JPH10310941A - Spinning machine with spindle motor control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine having a spindle motor control system which reduces the costs of production and maintenance/inspection and enables stable operation of the low-voltage circuit. SOLUTION: In a spinning machine 1A with a spindle motor control system A, a pair each of electroconductive contactors in electrical contact is disposed at a mid-point of at least two-phase power supply lines of the three-phase power supply lines 35. Each pair of electroconductive contactors is adapted to be separated when an insulating unit is inserted and to become contacted again when the same is removed. A control system is installed to control each of the spindles 9 separately when the insulating unit is inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning machine having a spindle motor control system (hereinafter, simply referred to as "spinning machine"). More specifically, at least a rotation of a spindle for drawing elongated fibers from a natural fiber or a synthetic fiber lump or a state before producing the fiber (hereinafter, these are referred to as “fiber lump”) and twisting the drawn fiber is described. For those that are temporarily suspended.

[0002]

2. Description of the Related Art A ring spinning machine as an example of a spinning machine will be described with reference to FIGS. The ring spinning machine is used in a spinning process, which is a final process of a spinning process for turning a fiber mass into a yarn. FIG. 21 is an overall perspective view of the ring spinning machine 1, and FIG.
23 is a view of the spindle 9s viewed from above, FIG. 24 is an enlarged view of a main part of the individual stop control unit 13, and FIG.
FIG. 2 is a view of the virtual cut plane including the line VV of FIG.
6 is a diagram showing a state in which the yarn 18 has been pulled out from the spindle blade 9s, FIG. 27 is a diagram showing the yarn 18 covered with the bobbin 9b, and FIG. 28 is a view showing a virtual cutting plane including the line VIII-VIII in FIG. FIG.

As shown in FIG. 21, the configuration of the conventional ring spinning machine 1 is generally as follows. That is, the uppermost roving portion 3 composed of a plurality of rovings 3r as a fiber mass, the draft portion 5 immediately below the roving portion 3, and the snail wire portion for guiding the yarn 6 hanging from the drafting portion 5 A guide body 7, a spindle section 8 for winding the thread 6 guided by the snail wire section below, a spindle motor section (drive section) 11 for driving the spindle section 8 from below, The ring spinning machine 1 is configured with an individual stop control unit 13 (hereinafter abbreviated as a control unit) for individually stopping the spindle motors 12 as a main part. The roving unit 3
r, the draft portion 5, the snare wire portion, and the driving portion 11 are all the same number (6 in this example), and therefore, unless otherwise specified, all members are the same number and correspond to each other unless otherwise specified. It will be described as if it were.

[0004] The configuration of the roving section 3 is as follows. That is, the roving part 3 is composed of a creel C in which two support rods are arranged in parallel, and six rovings 3r, 3r,... Suspended from the creel C. The yarn 6 taken out from each roving 3r is extended to the draft part 5 via the guide rod 14. The draft part 5 includes a back roller 5r1 and a middle roller 5r.
2 and a front roller 5r3. The surface speeds of the back roller 5r1, the middle roller 5r2, and the front roller 5r3 are set to approximately 1: 2: 20. Due to such a difference in speed, the roving 3r is stretched to provide a required thickness, elasticity, and strength.

[0005] The configuration of the snare wire section 7 is as follows. That is, the spirally wound wire body 7w is connected to the support rod 7s.
A snare wire portion is formed from the device attached to the snare wire.
Each wire body 7w is arranged directly below each roller group 5r. The yarn 6 hanging from the draft part 5 is
w is passed through the spiral, thereby preventing the adjacent yarns 6 from becoming entangled with each other.

[0006] The spindle section 8 is composed of a plurality of spindles 9, and each spindle 9 is configured as follows. That is, a spindle blade 9s (see FIGS. 26 and 28), which is a rod-shaped rotating body, and a bobbin 9b for winding the yarn 6 placed on the outside of the spindle blade 9s.
A ring-shaped traveler 15 for twisting the yarn 6 sent via the snail wire portion 7;
The spindle 9 is constituted by a ring 17 for guiding the spindle 9. As shown in FIG. 23, the traveler 15 can slide around the bobbin 9b in order to wind the twisted yarn 6 on the bobbin 9b several times. In FIGS. 22 and 23, reference numeral 18 denotes a tube thread formed by the thread wound around the bobbin 9b. Figures 26 and 27
Indicate a state in which the yarn 18 is removed from the spindle blade 9s and a state in which the bobbin 9b is put on the spindle blade 9s again to manufacture the yarn 18.

The spindle blade 9s is rotatably supported by a non-rotating bolster 11b (described later) via an insert 9i. Insert 9i is
This is for absorbing the impact of the spindle blade 9s. A rotor 9r corresponding to the spindle motor unit 11 is attached to a peripheral surface of a lower end portion of the spindle blade 9s.

Reference numeral 19a in FIG. 21 indicates an anti-node ring. The anti-node ring 19a is located above the spindle 9 to stabilize the yarn 6. Reference numeral 19b indicates a ring rail. The ring rail 19b is a plate-like body for supporting the ring 17. The ring 17 has a spindle 9 in its longitudinal direction.
A plurality of through holes (not shown) through which the spindle 9 is passed are formed side by side, and a plurality of spindles 9 are received in these holes.

As shown in FIGS. 21 and 22, the spindle motor section 11 includes a plurality of spindle motors 12, and the spindle motors 12 supported on the spindle rails 20 are directly attached to the respective spindles 9.
That is, the spindle motor 12 incorporates a box-shaped hollow case 12c and a stator 12s wound with a temporary winding,
The rotor 9r described above corresponds to the stator 12s. Each spindle motor 12 is shown in FIG.
As shown in FIG. 7, when the switch 11s is operated, the control unit 13 functions to stop or restart.

The control unit 13 is configured as follows.
That is, as shown in FIG. 24, a duct 21 having a dustproof and waterproof structure as a case body, a plurality of control circuit boards 23 incorporated in the duct 21, and a plurality of power supply line boards 2
5 constitutes a control unit 13. Power supply line board 2
5 is connected via a power supply line 27 covered with the output of an inverter power supply 26 provided outside. Also,
A low-voltage signal line and a low-voltage power supply line 29 for supplying a low voltage to the control circuit board 23 are also connected to the power supply line board 25. Note that in FIG.
Indicates a power supply connection line for connecting the control unit 13 to another control unit 13.

Next, the operating state of the ring spinning machine 1 will be described with reference to FIGS. First, electric power is supplied from an inverter power supply, whereby the spindle motor 12
Drives. By driving the spindle motor 12, the spindle 19s integral therewith rotates, and the bobbin 9b rotates accordingly. The traveler 15 on the ring 17 is pulled by the thread 6 to be wound on the bobbin 9b and rotates at a speed close to the rotation of the bobbin 9s (spindle 9s). At this time, the rotation difference between the bobbin 9b and the traveler 15 causes the bobbin 9b to wind the yarn 6. The speed at which the yarn 6 from the front roller 5r3 is sent out is determined by the bobbin 9b.
Is the same as the winding speed. In addition, this thread 6
Each time the traveler 15 makes one revolution, one twist is applied.

[0012]

As shown in FIGS. 26 and 27, when the yarn 6 is wound to form the tubing 18, the space between the snail wire 7 and the spindle 8 or The yarn 6 may be broken between the draft part 5 and the snare wire part 7. It is conceivable that extra force applied to the yarn 6 due to improper rotation of the spindle is a cause of the yarn breakage. The same applies to other spinning machines having a spindle control system such as a ring twisting machine and a double twister as well as a ring spinning machine.

In order to connect the broken yarn, the spindle motor 12 must first be stopped. The stop of the spindle motor 12 is performed by operating the switch 11s and controlling the control circuit board 23 provided on each spindle motor 12.
Is performed by individually operating Such a control circuit board must be provided for each spindle motor 12. Depending on the type of spinning machine, some large ones have approximately 1000 spindle motors, and in this case, approximately 1000 control circuit boards are required. However, it is highly unlikely that 1000 threads will break at the same time, so not all control circuit boards are needed at the same time. Having to have several control circuit boards without knowing when they would be needed was very uneconomical in terms of manufacturing costs and maintenance and inspection costs. Solving this economic problem is the first problem to be solved by the present invention.

A large-scale ring spinning machine has a total length of up to 40 meters, and the ring-spinning machine of this scale has a thread of about 1,000 weights.
To such a large-scale ring spinning machine, power is supplied from the inverter power supply 26 to the control unit 13 of the adjacent machine block via the power supply connection line 31. Similarly, the low-voltage power supply transmits low-voltage power and signals to the control circuit board 23 of the control unit 13 through a long distance of several tens of meters via the low-voltage signal line and the low-voltage power supply line 29. Can be Such a long low voltage system signal line / low voltage system power supply line 2
Using 9 makes it easier to pick up unnecessary signals, etc.
In some cases, the operation of the low voltage system circuit becomes unstable, and the control of the entire ring spinning machine is adversely affected. Eliminating this adverse effect is the second problem to be solved by the present invention.

[0015] The last problem to be solved by the present invention is:
It is to improve the efficiency of the power supply, that is, to reduce the voltage drop due to the electric resistance of the power supply line 27 and to increase the efficiency of the wiring work. That is, the storage duct 6
7, a coated power supply line 27 and the like are incorporated. In order to reduce the electric resistance, the power supply line 2 is used.
7 must be as thick as possible (as large as possible in cross-sectional area). However, there is a limit in increasing the thickness of the storage duct 67 due to the size restrictions of the storage duct 67 and the like. Also, since the wiring work must be performed with the power supply line 27 peeled off the clothing,
It is not always efficient. A third problem is to solve this.

[0016]

Means for Solving the Problems The inventor of the present invention, which has made intensive studies to solve the first problem described above, has to separately provide a control circuit board for every spindle motor in a conventional spinning machine. We abandoned the idea of focusing on the fact that control circuit boards need only be where needed when needed. In order to solve the second problem, an alternative method of transmitting low-voltage power or a signal has been developed. Furthermore, in order to solve the third problem, a bare wire is used without using a covered wire, and the shape and configuration of the bare wire are improved to improve the efficiency of wiring work. The present invention has been made from such a viewpoint. Hereinafter, the description will be given in detail after revising the section.

That is, a spinning machine according to the present invention comprises a plurality of spindles for drawing out elongated fibers from a lump of natural fibers or synthetic fibers, twisting the drawn fibers, and The same number of spindle motors as the number of spindles mounted on the spindle motor, an inverter power supply for supplying drive power to the spindle motor, and a three-phase power supply line for individually connecting each of these spindle motors and the inverter power supply are provided. Including, if necessary, other members and devices are provided. The feature of this spinning machine is that an opening / closing mechanism for interrupting power supply is provided at least in the middle of each of the two-phase power supply lines among these three-phase power supply lines, A braking device for individually braking the spindles is provided.

The spinning machine having the above-described characteristics does not include the individual control circuit board provided in the conventional spinning machine. Instead, an opening / closing mechanism is provided in the middle of each power supply line, the power supply is cut off by opening it, and the supply is resumed by closing it. If the supply of power is stopped, the spindle motor does not stop immediately due to the inertial force, and the braking device (brake) decelerates or stops it directly or indirectly. After stopping (moderately decelerating), the broken thread may be connected. By the action of the braking device, we can quickly enter the thread binding work,
The efficiency can be increased. After the connection, the opening / closing mechanism is closed and power is supplied to restart the spindle motor.
If this configuration is adopted, it can be made much cheaper than the conventional spinning machine, so that it can be economically greatly improved (solution of the first problem). Further, a long low-voltage signal line / low-voltage power supply line Can be omitted, so that adverse effects on the entire spinning machine caused by unnecessary signals and the like picked up by these can be eliminated (solution of the second problem).

The "spinning machine" in the present specification may be any machine having the above-mentioned characteristics.
Examples of such a device include a ring twisting machine and a ring twisting machine, as well as a double twister. Similarly, the "opening / closing mechanism" may be mechanical, electrical, or other, as long as it has a rating sufficient for supplying and shutting off power. Note that “at least two phases” in each of the three-phase power supply lines means that two phases or all three phases may be used.

Similarly, "braking" refers to decelerating or stopping the rotation of the spindle (spindle motor) while suppressing the rotation of the spindle. The "braking device" may be any device having a function of braking. . Examples of the braking device include an electric braking device that performs braking by applying a DC voltage to a spindle motor, a mechanical braking device that absorbs kinetic energy of rotation of a spindle (spindle motor) by friction, and decelerates and stops. is there. Examples of the mechanical braking device include a manual brake, a vacuum brake, and an air brake that directly and indirectly apply mechanical friction to a rotating spindle or the like.

The spinning machine according to the second aspect of the present invention basically has the same configuration, operation and effect as those of the first aspect, and its major feature lies in the opening and closing mechanism. That is, it includes a pair of electrically-contacted conductive contacts and an insulating unit that can be inserted and removed between the pair of conductive contacts, and the pair of conductive contacts is inserted when the insulating unit is inserted. This opening and closing mechanism is characterized in that it comes into contact again after being separated and extracted.

According to this opening / closing mechanism, since the individual members are only the conductive contacts and the insulating unit can be used as a common member, the structure of the opening / closing mechanism itself is correspondingly simplified and the cost is further reduced. In addition, as for "a pair of conductive contacts", as long as both can be electrically contacted, as long as the supply of power can be cut off and restarted by inserting or removing the insulating unit, It doesn't matter what shape it is made of. “Electrically contacting” means that contact is made so that electricity flows directly and indirectly. Further, the "insulating unit" may be any unit that can separate each pair of conductive contacts when inserted (inserted) and make contact again after removal. For example, there are a substrate itself having an insulating property, such as a synthetic resin plate, and a substrate having a structure for interrupting conduction by some method although the substrate itself has conductivity.

The spinning machine according to the third aspect of the present invention basically has the same configuration, operation and effect as those of the first aspect, and its major features are the opening and closing similar to the first aspect. In the mechanism. That is, it includes a pair of conductive contacts and an opening / closing member slidably provided between the pair of conductive contacts, and by sliding the opening / closing member, the insulating portion and the conductive portion provided on the insertion member are formed. The opening and closing mechanism is characterized in that it can be selectively brought into contact with each of the pair of conductive contacts.

According to this opening / closing mechanism, the opening / closing mechanism slides,
In other words, just moving the opening and closing member without removing it,
Conductive contact that was in contact with the insulation (electricity does not flow)
Can be brought into contact with the conductive part to energize or vice versa. The opening and closing member may be configured so as not to be removed from between the conductive contacts, but is preferably configured to be able to be removed. If it is configured to be able to be removed, this opening / closing member can be used as a common member as in the second aspect, so that the structure of the opening / closing mechanism itself is simplified and the cost can be further reduced. In this case, it is preferable that the pair of conductive contacts be in electrical contact with each other when the opening / closing member is pulled out.

A spinning machine according to a fourth aspect of the present invention basically has the same structure and operation and effect as those of the first aspect, and its major features are the opening and closing of the spinning machine as in the first aspect. In the mechanism. That is, the opening / closing mechanism is characterized in that it includes a pair of conductive contact terminals separated from each other and a connecting member for electrically connecting the pair of conductive contact terminals when closed, that is, when energized. .

The form of the conductive contact terminal and the connecting member in this opening / closing mechanism may be any as long as the purpose and the rating are satisfied. The connecting member may or may not be removable.

[0027] The spinning machine according to the invention described in claim 5 basically has the same configuration, operation and effect as those described in any one of claims 1 to 4, and its major feature is that it is mechanical. In the braking system. That is, a friction piece for bringing into frictional contact with the spindle, a brake arm to which the friction piece is fixed, an operating lever for moving the brake arm closer to and away from the spindle, and a rotatable operating lever. The braking device is characterized in that the braking device includes a supporting portion for supporting and a biasing means for biasing the brake arm away from the spindle.

The mechanical braking device may be mounted on an individual spindle, or may be a detachable type mounted on an arbitrary spindle as required. It suffices that at least one friction piece or brake arm is provided, but it is preferable that the friction pieces or the brake arms be simultaneously (concentrically) pressed from at least two opposing directions. This is because the gap between the stator and the rotor of the spindle motor is generally very small, and if the friction piece is pressed from only one side, the spindle may be shaken and both may come into contact with each other. Further, if cost-wise structure permits, three friction pieces may be used and shifted by 120 degrees at a time, and the three pieces may be simultaneously (concentrically) pressed against the spindle. The operation direction of the operation lever portion may be a vertical direction, a horizontal direction, or any other direction.

The spinning machine according to the invention described in claim 6 basically has the same configuration, operation and effect as those described in any one of claims 1 to 4, and its major features are described in claim 5 as in the braking device. That is, the braking device is characterized in that it includes a braking voltage power supply for applying a braking DC voltage to the spindle motor including a braking voltage power supply for applying a braking DC voltage to the spindle motor.

In this electric braking device, it is needless to say that the braking voltage is a voltage sufficient to brake the spindle, and is attached to each spindle similarly to the mechanical braking device according to the fifth aspect. Or a detachable type that can be attached to any spindle as needed. Needless to say, this braking voltage is sufficient to brake the spindle.

A spinning machine according to a seventh aspect of the present invention basically has the same configuration and operation and effect as those of any of the first to fourth aspects. DC voltage applied by the power supply. In other words, the three-phase power supply lines described above are rectified in three phases or any two phases of the three-phase power supply lines, that is, rectified AC voltages extracted from an inverter power supply that is a drive power supply for the spindle motor. In particular, there is a characteristic of this DC voltage.

Since the DC voltage is taken out in this way, it is not necessary to prepare a power source for taking out the braking voltage, so that the cost of the whole spinning machine can be reduced accordingly. .

The spinning machine according to the invention described in claim 8 basically has the same configuration, operation and effect as those described in any one of claims 1 to 7, and each opening and closing described so far. The most significant feature is that the opening and closing of the mechanism and the braking and release of the braking device are linked.

If the two are linked in this way, the braking device can be operated by opening the opening / closing mechanism, and conversely, the braking can be released in conjunction with the operation of closing the opening / closing mechanism. it can. As a result, a plurality of actions can be generated by one operation (one action), so that the operation procedure is simplified, and the work such as thread connection can be performed more quickly and efficiently. Which of the opening / closing operation of the opening / closing mechanism and the braking (release) operation of the braking device should be mainly used and which one should be used may be determined based on the design concept of the designer, the structure of the opening / closing mechanism (braking device), and the like. Any method that can be adopted by those skilled in the art can be used for how to link the two.

The spinning machine according to the ninth aspect of the present invention basically has the same structure, operation and effects as those of the first to eighth aspects. Mounting method. That is, it is characterized in that the periphery of the stator windings constituting each spindle motor is solidified with a synthetic resin material, and the form of the synthetic resin material is formed so that a part or all of each opening / closing mechanism can be attached.

With this configuration, a motor case generally used for protecting the stator winding portion can be omitted, so that the assembling work can be saved by that much and the cost is advantageous. . The use of synthetic resin material allows the design of the form with a relatively wide degree of freedom according to the form of the stator winding and the opening / closing mechanism, etc., and also facilitates the opening / closing between each opening / closing mechanism and each component. This is because it can be insulated. In this specification, "part or all of the opening / closing mechanism" means a part or all of the component parts of the opening / closing mechanism when they are single parts, and when there are a plurality of components, these components The meaning includes both meanings of (part of or all of) some components and (part or all of) all components. The mounting method may be any.

According to a tenth aspect of the present invention, there is provided a spinning machine, wherein a plurality of spindles for drawing out elongated fibers from a lump of natural fibers or synthetic fibers, twisting the drawn fibers, and each of the spindles are provided. The same number of spindle motors as the attached spindles, an inverter power supply for supplying drive power to the spindle motor, and a three-phase power supply line for individually connecting each of the spindle motors and the inverter power supply. A pair of conductive contacts are provided in the middle of at least two-phase power supply lines of each of the three-phase power supply lines in a state where they are in electrical contact with each other. The contact has a structure in which a circuit unit described in the next section can be inserted and removed between the two.

The spinning machine constructed as described above has the same effect as the first embodiment in that it does not have a separate control circuit board provided in the conventional spinning machine. The main difference in structure from the one described in claim 1 is that a pair of conductive contacts and a circuit unit are used as an opening / closing mechanism, and that the function of a braking device is provided to this circuit unit. is there. That is, setting the circuit unit to at least one of the DC braking mode, the three-phase power supply cutoff mode, the three-phase power supply mode, and at least one of the three DC weak braking modes, and operating the changeover switch. Thus, any one of the at least one mode set as the DC braking mode can be selected. In other words, this circuit unit requires the DC braking mode, and can select from at least three other modes. This circuit unit is operable when the pair of conductive contacts are inserted and the pair of conductive contacts are separated from each other, while the pair of conductive contacts are brought into contact again after being extracted.

Here, "select from at least three other modes" means that only the selected mode (for example, three-phase power supply cutoff mode) is set in the circuit unit, and that two (for example, three (Phase power supply cutoff mode and three-phase power supply mode) or three modes are set, and a necessary one of these modes is selected. That is, in the former case, only the three-phase power supply cutoff mode is set (selected), and either the DC braking mode or the three-phase power supply cutoff mode is selected. On the other hand, when the two modes are set in the latter, one of the DC braking mode, the three-phase power supply cutoff mode, and the three-phase power supply mode is selected. This is the same when a fourth mode other than these three modes is set.

The contents of each mode set in the circuit unit are as follows. That is, in the DC braking mode, the DC voltage obtained from the braking voltage power supply device provided outside or inside the circuit unit is applied to each of the spindle motors to perform braking. In the case of the three-phase AC power to each spindle motor is configured to be shut off, and in the three-phase power supply mode, the three-phase AC power is configured to be supplied to each spindle motor. In the weak braking mode, a DC weak voltage obtained from the braking voltage power supply device is applied to each of the spindle motors so as to prevent the respective spindles at the time of stoppage from rotating spontaneously.

The form of the above-mentioned "circuit unit" may be made in accordance with the form of each pair of conductive contacts.
The "braking voltage supply circuit" may be any circuit that can supply a DC voltage necessary for braking the spindle motor to such an extent that the thread binding operation can be performed. Also,
“Natural rotation” means rotation that is passively performed by a spindle motor that receives an external force, and is different from rotation that is actively performed by receiving power supply. Since the yarn joining is performed by twisting (rotating) the broken yarns, the spindle motor is spontaneously rotated by receiving an external force. When spinning naturally, the yarn cannot be twisted as desired. Therefore, in order to prevent the natural rotation, a DC weak voltage lower than the braking DC voltage is applied to the spindle motor. The circuit unit works only when inserted between the conductive contacts, and after being removed, a three-phase alternating current is applied to the spindle motor.

The spinning machine according to the eleventh aspect of the present invention basically has the same configuration, operation and effect as those of the tenth aspect, and the major feature lies in the braking voltage power supply. In other words, the braking voltage power supply device of this braking voltage power supply device is configured to rectify the AC voltage extracted from the three phases or any two phases of each three-phase power supply line connected to the inverter power source to obtain a DC voltage and a DC weak voltage. There are features.

With this arrangement, a DC voltage can be obtained by a simple circuit, and the structure of the braking voltage power supply circuit is simplified, which is very advantageous in terms of cost. In addition, since the circuit unit itself can be reduced in size and weight, it is very convenient to carry around in a spinning factory.

The spinning machine according to the twelfth aspect of the present invention basically has the same structure and operation and effect as those of the tenth or eleventh aspect. It is in. That is, this relay unit electrically relays the circuit unit and each pair of conductive contacts, and can be inserted into and extracted from each pair of conductive contacts instead of this circuit unit. . In addition, this relay unit is configured so that a circuit unit can be inserted and extracted freely. Further, when the relay unit is inserted alone, the conductive contacts are insulated from each other.

That is, in this spinning machine, the circuit unit is not directly inserted (connected) between the conductive contacts.
There is a great feature in performing the processing via the relay unit. That is, when the circuit unit is removed from the inserted relay unit or when the relay unit is independently inserted, the relay unit functions as an insulating unit and cuts off power supply to the spindle motor. The reason why the relay unit is provided is that it is particularly convenient when there is any reason that the spindle motor should be stopped even after the circuit unit is extracted. Even if the circuit unit is pulled out, the conductive space between the conductive contacts remains insulated, so that the spindle motor continues to stop. If the relay unit is inserted alone, it can be used as an insulating unit according to the second aspect.

The spinning machine according to the thirteenth aspect of the present invention basically has the same configuration, operation and effect as those of the tenth aspect of the present invention. In the method of mounting the conductive contact. That is, it is characterized in that the periphery of the stator windings constituting each spindle motor is solidified with a synthetic resin material, and the form of the synthetic resin material is formed so that each pair of conductive contacts can be attached.

According to this structure, the first aspect of the present invention is provided.
Almost the same operation and effect as those described in 3 can be obtained. The method of attaching the pair of conductive contacts may be any method as long as it can be attached without impairing the function of the conductive contact, and there is no limitation on the mounting direction.

According to a fourteenth aspect of the present invention, there is provided a spinning machine for drawing elongated fibers from a lump of natural fibers or synthetic fibers, twisting the drawn fibers, and providing a plurality of spindles for each of the spindles. The same number of spindle motors as these installed spindle motors, an inverter power supply for supplying drive power to these spindle motors, and a three-phase power supply line for individually connecting each of these spindle motors and the inverter power supply. The three-phase power supply line has a basic configuration including the three-phase power supply line.

That is, the feature of the three-phase power supply line is that the three-phase bare bus connected to the inverter power supply, that is, the uncovered three-phase bus, and the distribution wiring for connecting the three-phase bare bus to each spindle motor. At least these three-phase bare buses are buried in a case made of insulating material and a part of the bare bus is exposed from this case, thereby improving the efficiency of power supply and the efficiency of wiring work. That is, it can be achieved (solution of the third problem). That is,
If an uncovered bare copper bar (copper bar), for example, is embedded in a case molded of synthetic resin or the like as an insulating material and these are used as the three-phase buses, the synthetic resin inserted between the copper bars is used. Since the resin serves as a covering (insulator), there is no need to cover each three-phase bus, and each copper bar, that is, the three-phase bare bus, can be made thicker (larger cross-sectional area) by that much. is there. Other conductors may be used instead of copper bars. The form of the exposed surface of the copper bar may be any as long as the wiring operation can be performed.

A spinning machine according to a fifteenth aspect of the present invention basically has the same configuration, functions and effects as those of the fourteenth aspect, and is characterized by That is, at least the exposed portion is made flat. As described above, the configuration of the exposed surface is not limited at all as described above, but when connecting another conductor (copper bar) or the like, the contact area between the two is made as large as possible. This is because it is preferable to reduce the resistance. In addition, if it is formed in a flat shape, there is an advantage that attachment of a crimp terminal or the like can be easily performed.

A spinning machine according to a sixteenth aspect of the present invention basically has the same configuration, operation and effect as those described in the fourteenth or fifteenth aspect.
The three-phase bare bus bar exposed from the case body is provided with a detachable terminal for attaching and detaching the distribution wiring. By providing such detachable terminals, the distribution wiring can be attached and detached via the detachable terminals, so that the efficiency of the wiring operation can be improved. Further, wires and electric circuits other than the separate wires may be connected as necessary. The “detachable terminal” may be a screw type, a jack type, or any other type. For example, there is a banana jack (banana plug) having a banana shape.

In the spinning machine according to the invention, a plurality of spindles for drawing out elongated fibers from a lump of natural fibers or synthetic fibers, twisting the drawn fibers, and each of these spindles are provided. The same number of spindle motors as the installed spindles, an inverter power supply for supplying drive power to these spindle motors, and a three-phase power supply line for individually connecting each of these spindle motors and this inverter power supply. Including
13. The method according to claim 12, wherein each of these three-phase power supply lines is constituted by a three-phase bare bus connected to the inverter power supply and a distribution wiring for connecting the three-phase bare bus to each spindle motor. It has the same configuration, operation and effect as described above. According to this configuration, at least the three-phase bare buses are arranged at predetermined intervals in the case body, and thereby the cross-sectional area of the three-phase bare buses is increased by the amount of no covering in the limited case body. be able to.

The spinning machine according to the eighteenth aspect basically has a configuration similar to that of the seventeenth aspect, and is characterized in that an insulating material is provided between the three-phase bare buses. It has been filled. According to this configuration, the insulation between the three-phase bare buses is enhanced, so that the electrical safety of the spinning machine can be enhanced.

[0054]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention (referred to as "embodiment" in this specification) will be described with reference to the drawings. The difference between the ring spinning machine (spinning machine) according to the present invention and the spinning machine already described in the section of the related art is a portion relating to a spindle motor and a control system thereof. For this reason, the same members as those used in the conventional spinning machine are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is an overall perspective view of a ring spinning machine according to a first embodiment, and FIG. 2 is a longitudinal sectional view of a spindle and a spindle motor. FIG. 3 is an enlarged view of a main part of FIG. 2, and FIG. 4 is a partially enlarged view of the control unit. FIG. 5 is FIG.
FIG. 6 is a view of the virtual cross section including the line XX in FIG. 6 viewed in the direction of the arrow, and FIG. FIG. 7 is a diagram showing a state before the circuit board is inserted between the contacts, FIG. 8 is a diagram showing the same inserted state, and FIG. 9 is a view showing the same state after the insertion. . FIG. 10 is a diagram showing a state in which the conductive contact is incorporated in the holding unit, and FIG. 11 is a circuit diagram for rectifying the three phases of the three-phase power supply. FIG. 12 is a circuit diagram showing the state of each mode, and FIG. 13 is a schematic diagram showing the second embodiment. FIG. 14 is a schematic diagram showing the third embodiment, and FIG.
FIG. 5 is a schematic view showing a fourth embodiment. FIG. 16 is a partially enlarged view of the relay connector, and FIG. 17 is a schematic view showing the fifth embodiment. FIG. 18 is a front view of FIG.
FIG. 19 is a view of a virtual cross section including the line YY in FIG. FIG. 20 is a schematic view of the sixth embodiment, and FIGS. 21 to 23 are front views showing the schematic structure of the opening / closing mechanism. 24 and 25 are schematic cross-sectional views showing the seventh embodiment.

FIG. 21 is an overall perspective view showing an example of a conventional ring spinning machine, and FIG. 22 is a view showing a bobbin and a thread of a spindle portion. FIG. 23 is a view showing the spindle viewed from above, and FIG. 24 is an enlarged view of a main part of the individual stop control unit. FIG. 25 is a view of the virtual cross section including the line V-V in FIG. 24 viewed in the direction of the arrow, and FIG. 26 is a view showing a state where the tubing is removed from the spindle blade. FIG.
FIG. 7 is a view showing a state in which a bobbin is put on a spindle blade to manufacture a bobbin, and FIG. 28 is a view of a virtual section including a line VIII-VIII in FIG.

(First Embodiment) In FIGS. 1 and 2,
Reference numeral 12A indicates a spindle motor. The spindle motor 12A is contained in a hollow case 12c. An insertion portion 33 is provided in the hollow case 12c so that a circuit board unit (circuit unit) 49 can be inserted therefrom. As shown in FIGS. 2 and 3, a three-phase power supply line 35 for transmitting power to the spindle motor 12 </ b> A is passed through the insertion portion 33. Three-phase power supply line 35
Is cut at the relay point 35p, and a pair of conductive contacts 37 and 39 are connected thereto. One conductive contact 37 and the other conductive contact 39 are brought into contact with each other so that electricity flows. The conductive contact 37 is connected to the inverter power supply 26 (FIG. 21), and the conductive contact 39 is connected to the spindle motor 12A. In the present embodiment, a combination of the conductive contacts 37 and 39 and the circuit unit 49 constitutes an opening / closing mechanism for shutting off power supply. This opening and closing mechanism may be combined with a braking device as described later.

The conductive contacts 37 and 39 and the holding portions 41 and 43 will be described with reference to FIGS. The conductive contact 39 is the same as the conductive contact 37,
Since the holding unit 43 and the holding unit 41 are the same, only the former will be described, and the latter will be omitted. The conductive contact 37 is formed by bending a highly conductive metal piece into a hook shape and mounting it in a mounting groove 41 c provided in the holding portion 41. As shown in FIG. 9, a part of the back surface of the conductive contact 37 is cut out and rises obliquely rearward to stop the stopper 4.
4, and the stopper 44 is hooked on a locking hole 41h provided in the holding portion 41. Thus, the conductive contact 37 does not come off the holding portion 41.

Reference numeral 45 shown in FIGS. 7 and 8 denotes a spring for pressing the holding portion 41 in the direction inside the insertion portion 33 (from bottom to top in the drawing). The spacing between the holding portion 41 and the holding portion 43 pressed by the action of the springs 45, 45 elastically expands or contracts. The conductive contact 37 may be made of a material having high elasticity, and may also have the function of the spring 45. The facing surfaces of the holding section 41 and the holding section 43 are shown in FIG.
And an opening 47 is formed therein. With this configuration, when a circuit unit 49 (described later) is inserted from the opening 47, the conductive contacts 37 and 39 are separated from each other, and when the circuit unit 49 is removed,
The conductive contacts 37 and 39 come into contact again by the action of the springs 45 and 45.

Next, the circuit unit 49 will be described with reference to FIG. The circuit unit 49 is configured such that one end portion 49e can be fitted and fixed in the insertion portion 33. The circuit unit 49 includes a case portion 51 having both ends opened, a movable body 53 fitted inside the open end 51e of the case portion 51 so as to be slidable in the longitudinal direction,
It has a circuit board 55 attached to the center of the movable body 53 and a changeover switch 59 provided on the circuit board. The changeover switch 59 is connected to the circuit board 55 by a connection line 60. Although the circuit unit 49 in the present embodiment is configured to be inserted directly into the raking unit 33, an extension cable or the like is connected between the circuit unit 49 and the raking unit 33, and a connector attached to the distal end thereof. May be inserted. With this configuration, the operation of the circuit unit 49 can be performed at a position away from the insertion section 33, which is convenient.

A control circuit 57 is provided on the circuit board 55. The control circuit 57 in the present embodiment includes a DC braking mode, a three-phase power supply cutoff mode, a three-phase power supply mode, and a DC weak braking mode. Set. A mode other than these four modes may be set as necessary.
Switching between these modes is performed by operating the changeover switch 59. In the DC braking mode, each three-phase power supply line 35U,
This is for applying a DC voltage generated by rectifying three phases (or any two phases) of 35V and 35W to each of the spindle motors 12A to stop them. In the three-phase power supply cutoff mode, each spindle motor 12A, 12A. . . To shut off three-phase AC power to the In the three-phase power supply mode, the spindle motors 12A, 12A. . . To supply three-phase AC power to the Further, the DC weak braking mode is provided for each three-phase power supply line 35U, 35V,
A weak DC voltage generated by rectifying three phases or any two phases of 35 W is applied to the spindle motors 12A to prevent the respective spindles from rotating spontaneously when stopped.

The reason why the three-phase power cutoff supply mode is provided in this embodiment is that it is not necessary to turn off the main switch of the inverter power supply 26 when the power supply to the spindle motor must be cut off for some reason. In order to Similarly, the reason why the three-phase power supply mode is provided is that, for example, it is convenient when the spindle motor is temporarily rotated in order to finish the thread connection and check the state of the connection. That is, the spindle motor 12A
To rotate the circuit unit 49, the insertion unit 33
It is enough if you extract it from However, the thread connection is incomplete,
In some cases, the circuit unit 49 needs to be immediately inserted and stopped. Thus, it is troublesome to remove and insert each time. Therefore, such trouble can be solved by temporarily rotating the spindle motor using the three-phase power supply mode. Similarly, the reason why the direct current weak braking mode is provided is to enable efficient yarn binding as described above.

Conductive portions 61, 61 as shown in FIG. 7 are provided on both surfaces of the distal end portion 55e of the circuit board 55 so that the conductive portions 61, 61 are in contact with the conductive contacts 37, 39 when inserted into the insertion portion 33 (see FIG. 7). 8 and 9). The energization of the control board 55 is performed through these conductive portions 61, 61. The circuit board 55 incorporates a rectifier circuit for rectifying any two phases of the three-phase power supply line 35 and a power supply circuit 65 having a DC / DC conversion circuit. The power supply circuit 63 is for obtaining a DC voltage for applying the spindle motor 12A when the DC braking mode and the DC weak braking mode are selected. Instead of the power supply circuit 63, a battery or an external power supply may be used.

The above-mentioned circuit unit 49 is inserted into the insertion portion 33 as shown in FIGS. That is, when the circuit board 55 is inserted, the tip end 55e separates the holding parts 41, 43 (conductive contacts 37, 39) while opposing the resilience of the springs 45, 45, and from the inverter power supply 26 to the spindle motor 12A. Cut off the power supply. Conversely, when the circuit unit 49 is pulled out, the holding portions 41 and 43 separated from each other.
The (conductive contacts 37, 39) are returned to their original positions by the resilient force of the springs 45, 45 and make electrical contact again. As a result, power is supplied, and the spindle motor 12A restarts.

FIGS. 21 to 22 show a modification of the circuit unit 49 constituting a part of the opening / closing mechanism. Reference numeral 49a in FIG. 21 indicates an insulating unit made of synthetic resin. This insulating unit 4 is placed between the conductive contacts 37 and 39.
By inserting the plug 9a, the two are separated from each other to cut off the power supply (FIG. 21 (a)), and by extracting the two, the two are brought into contact to restart the power supply (FIG. 21 (b)).

On the other hand, reference numeral 49b in FIG. 22 denotes an opening / closing member. The opening / closing member 49b is provided with a metal terminal (conductive portion) 49d at one end of the insulating unit 49a for conducting the front and back of the insulating unit. It is. When sliding in the state inserted between the conductive contacts 37 and 39,
The conductive contacts 37, 39, the metal terminal 49d, and the other portion (insulating portion 49c) can be selectively contacted. That is, the power is supplied when the contact is made with the metal terminal 49d, and the supply is interrupted when the contact is made with the insulating part 49c. The opening / closing member 49b in the present embodiment is configured so as to be able to be removed from between the conductive contacts 37 and 39, and is configured so that when they are removed, they are electrically in contact with each other to supply power.

The opening / closing mechanism shown in FIG. 23 is generally constituted by a pair of conductive contacts 37 and 39 and a rotating opening / closing member 49f provided therebetween, and the rotating opening / closing member 49f is rotated in the direction of the arrow in the figure. By doing so, the insulating parts 49g, 49
g and the conductive portion 49h can be selectively contacted.

Next, the control section 13A will be described mainly with reference to FIGS. Control unit 13A
Is composed of a storage duct (case body) 67 and a three-phase bus (copper bar) 69 embedded in the storage duct 67. Three-phase bus 69 forms a part of three-phase power supply line 35. The storage duct 67 is made of an insulating material such as plastic, and includes a base 67 b, a backing plate 73, and a cover 75. Substrate 6
Four groove grooves 67b1 to 67b4 for embedding the three-phase bus bar 69 are formed in parallel in the longitudinal direction of 7b. Groove 67
After embedding three three-phase buses 69 and the ground 71 in b1 to 67b4, the cover is covered with a backing plate 73, and the backing plate 73 is covered with a cover 75. Four groove grooves 67b1 to 67b
The configuration of b4 may be devised so that the three-phase bus 69 and the ground 71 do not fall off, and the contact plate 73 may be omitted.

Storage duct 67 Each three-phase bus 69 and ground 7
It is preferable that a part of 1 is exposed to the outside of the storage duct 67 (exposed). Electric power is supplied to the spindle motor 12A by the electric wires 74 screwed to the exposed surfaces 69o and 71o. Storage duct 67 in this embodiment
Is constructed by connecting two spindles 9 and 9 and connecting several of them to form a series of storage ducts for each number of weights (24 weights in this case) that is convenient for the configuration of the ring spinning machine 1A. ing.

Here, the electric circuit used in the present embodiment will be described with reference to FIGS. FIG.
Is for applying a DC voltage obtained by half-wave rectification and phase control of each phase of the three-phase AC supplied from the three-phase power supply line 35 to the spindle motor 12A. The configuration of the control circuit 57 is as follows. That is, a main element circuit 57A that performs switching, rectification, and phase control of the three-phase power supply, and a phase control (ignition control) circuit 57B that performs phase control and ignition control of each thyristor.
And the control circuit 57 is composed of a phase detection circuit 57C used for phase control.

The main element circuit 57A uses six thyristors. Three-phase power is supplied and cut off by the bidirectional thyristors THU1, THV1, and THW1. THU2
, THV3, THW1, and THV2 to perform three-phase half-wave rectification control for generating a DC voltage. Furthermore, THU2
And THV3 to perform phase control for changing the value of the DC voltage. Reference symbol D1 is a freewheel diode for flowing a freewheel current.

The main element circuit 57A shown in FIG.
This is when the three-phase power supply mode is selected. When the circuit board 55 is inserted into the insertion portion 33, the contacts 37U, 37V, and 37W on the three-phase bus side and the contacts 61U, 37V, and 37W that come into contact therewith 61
Power is supplied to the control circuit 57 via U, 61V, and 61W. At this time, the gate signals 57a and 57b are turned on so that the bidirectional thyristors THU1, THV1 and THW1 connected in series to each of the three phases U, V and W are turned on. The three-phase voltage input in this way is
It is output via contacts 37U, 37V, 37W on each three-phase bus side.

The main element circuit 57A shown in FIG.
This is when the three-phase power cutoff mode is selected. When the thyristors THU1, THV1 and THW1 are turned off so that the gate signals 57a and 57b are turned on as shown in the figure, the input three-phase voltage is applied to the contacts 37U and 3U.
No output to 7V, 37W. In this case, the thyristor THV2 for rectification control may be in either the on state or the off state.

The main element circuit 57A shown in FIG.
This is when the DC braking mode is selected. The gate signals 57a, THU1, and THV1 are all off. Here, the gate signals 57b, 57c, 57e, 5
When 7a is turned on and the W-phase series THW1, the rectification control THV2, and the phase control THU2 and THV3 are turned on, a three-phase half-wave rectifier circuit is formed by the V-phase, U-phase and W-phase. I do. The DC voltage output from the half-wave rectifier circuit is applied to brake the spindle motor.

On the other hand, if the ignition phase of the thyristor THV3 for phase control is delayed in the state of the DC braking mode, the value of the DC voltage applied to the spindle motor becomes smaller, so that the braking force becomes weaker (DC weak braking). mode). In this case, the ignition phase is controlled so that the DC voltage is such that the natural rotation of the stopped spindle motor is prevented. Note that if the voltage is too low, the spindle motor will rotate spontaneously and the thread connection operation will not be possible as expected.

The switching (selection) of each mode described above is performed by:
As described above, the operation is performed by operating the mode changeover switch 59 (see FIG. 3) provided on the circuit board 55. Although the mode changeover switch 59 in the present embodiment is constituted by a single switch, the mode may be switched by using a plurality of switches. For example, a timer may be incorporated so that the mode is automatically switched from the DC braking mode to the DC weak braking mode after a certain period of time.

Any of the above-mentioned modes other than the DC braking mode can be omitted depending on the situation, and a configuration of only the DC braking mode and any one of the modes may be adopted. That is, for example, if necessary, the DC braking mode and the DC weak braking mode may be configured only by two parties (the three-phase power supply cutoff mode and the three-phase power supply mode are omitted), or
A three-phase power supply mode can be added to these to provide a three-party configuration (the three-phase power supply cutoff mode is omitted). In short, the DC braking mode is always required, but at least one other mode may be provided as needed.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. Symbol 1B is
1 shows a ring twisting machine which is a kind of spinning machine. The ring twisting machine 1B is basically different from the ring spinning machine 1A in that the latter does not have the draft part 5 that the latter has, and that it has the roller 5r for pulling out the yarn from the roving part 3 that the latter does not have. . Other than these, there is no difference between the ring twisting machine and the ring spinning machine. Therefore, the same reference numerals are used in FIG. 13 for members common to the ring spinning machine 1A. In addition, descriptions of common members will be omitted to avoid duplication. Therefore, the operation and effect obtained by using the ring twisting machine 1B are not different from those of the ring spinning machine 1A.

(Third Embodiment) Next, a third embodiment will be described with reference to FIG. Reference numeral 1C denotes a double twister which is a kind of spinning machine. Next, referring to FIG. 14, a double twister 1 which is a spinning machine
C will be described. The double twister 1C basically employs the same method as the ring spinning machine 1A and the ring twisting machine 1B, and the spindle motor 12 for rotating the spindle 9, which is a component thereof, is controlled by a spindle motor control system A. Control. In FIG. 14, the fiber is wound around the yarn supply package 88 via a winding package 80, a winding drum 82, a roller 84 such as a feed roller, and a balloon guide 85. Therefore, the operation and effect obtained by using the ring twisting machine 1B are not different from those of the ring spinning machine 1A.

(Fourth Embodiment) A fourth embodiment will be described with reference to (1) and (2) of FIG. The fourth embodiment is different from the first embodiment in that the fourth embodiment has a relay unit that the first embodiment does not have. Here, only the relay unit 80 constituting a part of the opening / closing mechanism will be described, and description of the other members will be omitted.

The relay unit 80 is inserted between the circuit unit 49 and the insertion section 33 to relay the function of the circuit unit 49. The main advantage of providing the relay unit 80 is that the spindle motor 12A can be stopped without inserting the circuit unit 49 as described above. The configuration of the relay unit 80 is as follows.
That is, the relay unit 80 is constituted by the hollow case 81, the relay board 82 incorporated inside the hollow case 81, and the relay connector mounted on the rear end of the relay board 82. The hollow case 81 is made slightly larger than the circuit unit 49 so that the circuit unit 49 can be fitted therein. Similarly to the front end 55e of the circuit board 55, the front end of the relay board is connected to the holding portions 41, 43 (each of the conductive contacts 37, 43).
39). Relay connector 83
Open end of the circuit unit 55 allows the circuit board 55 of the circuit unit 49 to be inserted in the same manner as the holding portions 41 and 43.

Referring to FIG. 16, the relay connector 83
Will be described. The relay connector 83 has a pair of support portions 84, 84 and a pair of conductive contacts 85, 85 sandwiched between the support portions 84, 84. The relay board 82 is inserted and fixed from one side (left side in the figure) of the relay connector 83. At this time, each of the conductive surfaces 82a, 82a of the relay board 82 and each of the conductive contacts 85, 85 are brought into electrical contact with each other, thereby making indirect contact with each of the conductive contacts 37, 39 of the insertion portion 33. Let it. The conductive contacts 85, 85 are made of a conductive material having a high elasticity so as to be elastically deformed as shown by arrows when the circuit board 55 of the circuit unit 49 is inserted and removed, and the conductive surfaces 55a, 55a and It is configured to make electrical contact. Thereby, each conductive contact 3 of the circuit board 55 insertion part 33
7, 39 are electrically connected, and the spindle motor 12A
Can be controlled (braking).

The open ends of the conductive contacts 85, 85 in which the circuit board 55 is not inserted are separated from each other and are not in electrical contact with each other as shown in FIG. Therefore, when the relay unit 83 in this state is inserted, the conductive contacts 37 and 39 of the insertion portion 33 are separated from each other, and the supply of power to the spindle motor 12A is cut off.
In this case, the relay unit 83 also functions as an insulating unit for cutting off power. When the relay unit 83 is used as an insulating unit, the relay unit 83
Is inserted alone to shut off the power and the spindle motor 12
Wait for A to stop spontaneously and connect thread 6.

Referring back to FIG. 15B, a modified example of the fourth embodiment will be described. The feature of this modification is that an extension cable 88 electrically connected to the circuit unit 49 (circuit board 55) and a connector 89 connected to an open end thereof are provided. The extension cable 88 and the connector 89 are for enabling control of the spindle motor 12A at a location away from the insertion section 33. The circuit unit 49 in this modified example may be configured by a closed case instead of the hollow case. By doing so, it is possible to prevent accidents such as short circuit of the circuit board 55 due to dust or foreign matter entering. The configuration of the connector 89 is as follows.
Any material can be used as long as it can satisfactorily make electrical contact with the device and has an appearance that allows easy insertion and removal.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIG. The reference numeral 100 indicates a braking device attached to each spindle motor 12. The braking device 100 generally includes the following members. That is, an operating lever portion 101 for the operator to push down by hand, a support portion 102 for supporting the operating lever portion 101 to be able to move up and down, and a projection 103 protruding from below the operating lever portion 101. And the brake arms 110 and 111 of FIG. The tip 103a of the projection 103 has a gentle conical shape, and when the operating lever 101 is pressed down, the cam surfaces 11 of the brake arms 110 and 112 as shown in FIG.
1 and 113 (described later) so that they can be pushed and spread. As shown in FIG. 27, the braking device 100 is disposed so that the spindle is sandwiched between the brake arms 110 and 112. When braking the spindle blade, care should be taken that an equal braking force is applied from both, that is, concentrically.

The brake arms 110 and 112 are
Each has an S-shape, and both ends 110a and 112a are rotatably fixed by a pivot 114. Further, the guide holes 116 and 117 are penetrated in the thickness direction in the middle of the two, and the moving shaft 115 is passed through the guide holes 116 and 117 so that the brake arms 110 and 112 can be guided and moved by the guide holes 116 and 117. The support 102 is fixed to the upper end of the moving shaft 115. The open ends 110b and 112b of the upper end brake arms 110 and 112 of the moving shaft 115 are provided with the tapered cam surfaces 111 and 113 described above. Inside the brake arms 110 and 112, friction pieces 11
8 and 118, and the coil spring 11
9 and 119 are attached, and the brake arm 110 and the brake arm 112 are operated in a direction in which they are separated from each other. In this state, the spring force of the coil springs 119 is acting on the cam surface 111 and the cam surface 113 in a direction to draw them together.

The operation of the fifth embodiment is as follows. When the insulating unit is inserted into the power supply line to cut off the power supply and the operator pushes down the operating lever unit 101 by hand, the state shown by the phantom line in FIG. The tip of the projection 103 comes into contact with the cam surfaces 111 and 113. The solid line in FIG.
It is in contact. When the operating lever 101 is further depressed, the state shown by the imaginary line in FIG. 25 is obtained, and the component force of the projecting end 103a acts on the cam surfaces 111 and 113, respectively, so that the open end 110 of the projecting brake arm 110
b and the open end 112b of the brake arm 112 are pushed out while opposing the spring force of the coil springs (biasing means) 119, 119. Then, the guide hole 11 is formed in the moving shaft 115.
6,117 are guided, and as a result, the brake arm 11
As 0 and 112 rotate (rotate) about the pivot 114, the friction pieces 118 and 118 approach each other to brake the spindle 9s.

As shown in FIG. 18, since the friction pieces 118 and 118 come into contact with the spindle blade concentrically, the braking force of one of them does not become larger or smaller than that of the other. Is added to To release the braking, the operating lever 101 may be released. By the action of the coil springs 119, 119, the cam surfaces 111, 1
13 are brought close to each other and push up the protrusion tip 103a, so that the operation lever 101 automatically returns to the original position. In the fifth embodiment, a coil spring is used as the urging means. However, the present invention is not limited to this. Any type can be used as long as the brake arms 110 and 112 can always be urged in the expanding direction (direction away from the spindle). For example, when the friction pieces 118, the brake arms 110, 112, and the like have elasticity, they function as urging means. That is, in this case, the friction piece 1
The arm 18 is deformed when it comes into contact with the spindle, and returns elastically when it receives no external force for braking, and functions to expand the brake arms 110 and 112.

(Sixth Embodiment) A sixth embodiment of the present invention will be described with reference to FIG. In the sixth embodiment,
Basically, the same operation and effect as those of the fifth embodiment can be obtained. The major feature is that in the fifth embodiment,
While the spindle blade is braked by depressing the operating lever portion, in the sixth embodiment, the braking is performed by gripping the handles 111, 111 of a braking device configured like a pliers. It is in the point. Also in this case, the coil spring 119 functions as an urging means. As described in the fifth embodiment, the coil spring 119 may be omitted and the friction piece 118 or the like may be used as the urging means.

(Seventh Embodiment) A seventh embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the opening and closing of the opening and closing mechanism, the braking of the braking device, and the release thereof are interlocked. The combination of the opening / closing mechanism and the braking device can be freely determined as long as they can be linked, but FIG. 24 shows a combination of the opening / closing mechanism of FIG. 22 and the mechanical braking device of FIG. In order to avoid repeated description, common reference numerals and names are used for common members, and descriptions of those members are omitted.

That is, the opening / closing member 49f is fixed to the lower end of the center of the operating lever 101, and the operating lever 101 is rotated (rotated) in the direction indicated by the arrow with the support 102 as a pivot.
When opened, the opening and closing member 49b slides between the conductive contacts 37 and 39. In the present embodiment, when the operating lever portion 101 is pulled up, the two conductive contacts 37 and 39 and the insulating portion 4 of the opening / closing member 49f.
9c (see FIG. 22), the opening / closing mechanism is opened, and when it is pulled down, it comes into contact with the conductive portion 49d to be closed. The protrusion 103 acts on the brake arm 112 to brake the spindle 9s in conjunction with the raising of the operating lever 101, and releases the braking in conjunction with the lowering.

Reference numeral 150 in FIG. 25 denotes a synthetic resin cover member (synthetic resin material) in which the stator windings (shown by dotted lines) of the spindle motor are solidified. As described above, in the present embodiment, the form of the cover member 150 is formed so as to have the function of a motor case and to be able to attach the opening / closing member 49f. The form of the cover member 150 is formed according to the shape of the opening and closing mechanism.

Further, instead of the conductive contacts 37 and 39, a pair of conductive contact terminals 37a and 39a separated as shown in FIG. 25 may be used. Double conductive contact terminal 3
Conduction between 7a and 39a is performed by pushing down the operating lever portion 101 against the spring force of the spring 101b and bringing the conductive connecting member 101a insulated and fixed to the lower end thereof into contact with both terminals. When the operating lever portion 101 is released, the operating lever portion is pushed up by the spring force of the spring 101b and the contact of the connecting member 101a is eliminated, and the projection 103 acts on the brake arm 112 in conjunction with this.

[0094]

The following effects can be obtained by using the spinning machine according to the present invention. First, since the number of control circuit boards is reduced, manufacturing costs and maintenance / inspection costs can be suppressed. Second, since unnecessary long low-voltage signal lines and low-voltage power supply lines are not required, unnecessary signals and the like are not picked up. As a result, the operation of the low-voltage circuit is stabilized, and the control of the spinning machine is also stabilized. Finally, the efficiency of power supply and
It is possible to improve the efficiency of wiring work.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a ring spinning machine according to a first embodiment.

FIG. 2 is a longitudinal sectional view of a spindle and a spindle motor.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a partially enlarged view of a control unit.

5 is a view of an imaginary cross section including the line XX in FIG. 4 as viewed in the direction of the arrow.

FIG. 6 is a view of a virtual cross section including a line IV-IV in FIG. 4 as viewed in a direction of an arrow.

FIG. 7 is a diagram showing a state before a circuit board is inserted between contacts.

FIG. 8 is a diagram showing a state where a circuit board is inserted between contacts.

FIG. 9 is a diagram showing a state in which the circuit board has been inserted between the contacts.

FIG. 10 is a diagram showing a state in which a conductive contact is incorporated in a holding unit.

FIG. 11 is a circuit diagram for rectifying three phases of a three-phase power supply.

FIG. 12 is a circuit diagram showing the state of each mode.

FIG. 13 is a schematic view showing a second embodiment.

FIG. 14 is a schematic view showing a third embodiment.

FIG. 15 is a schematic view showing a fourth embodiment.

FIG. 16 is a partially enlarged view of a relay connector.

FIG. 17 is a schematic view showing a fifth embodiment.

FIG. 18 is a front view of FIG.

FIG. 19 is a view of a virtual cross section including a line YY in FIG. 18 as viewed in a direction indicated by an arrow.

FIG. 20 is a schematic diagram of a sixth embodiment.

FIG. 21 is a front view showing a schematic structure of an opening / closing mechanism.

FIG. 22 is a front view showing a schematic structure of an opening / closing mechanism.

FIG. 23 is a front view showing a schematic structure of an opening / closing mechanism.

FIG. 24 is a schematic view showing a seventh embodiment.

FIG. 25 is a schematic view showing a seventh embodiment.

FIG. 26 is an overall perspective view of a conventional ring spinning machine 1.

FIG. 27 is a view showing a bobbin 9b and a thread 18 of the spindle unit 8;

FIG. 28 is a view of the spindle 9s as viewed from above.

FIG. 29 is an enlarged view of a main part of the individual stop control unit 13.

30 is a view of a virtual cut plane including a line VV in FIG. 24 as viewed in a direction indicated by an arrow.

FIG. 31 is a view showing a state in which the yarn 18 has been extracted from the spindle blade 9s.

FIG. 32 is a view showing a tube thread 18 covered with a bobbin 9b.

FIG. 33 is a view of an imaginary cutting plane including a line VIII-VIII in FIG. 26 viewed in a direction indicated by an arrow.

[Explanation of symbols]

 1A to 1C Spinning machine A Spindle motor control system 3r Fiber lump 9 Spindle 12A Spindle motor 26 Inverter power supply 35 Three-phase power supply line 37 Conductive contact 39 Conductive contact 49 Circuit board unit 59 Operation switch 67 Case body 69 Exposed Part 80 relay unit 83 relay connector 84 support part 89 connector 100 braking device 101 operating lever part 102 support part 103 protruding part 110 braking device 111 cam surface 119 urging means

Claims (18)

[Claims] 1. A plurality of spindles for drawing out elongated fibers from a lump of natural fibers or synthetic fibers and twisting the drawn fibers; the same number of spindle motors as the number of spindle motors attached to each of the spindles; A spinning machine having a spindle motor control system including: an inverter power supply for supplying drive power to the spindle motor; and a three-phase power supply line for individually connecting the spindle motors and the inverter power supply. An opening / closing mechanism for shutting off power supply, at least in the middle of each of the two-phase power supply lines of the phase power supply lines,
A spinning machine having a spindle motor control system, comprising a braking device for individually braking each of the spindles when opening these opening / closing mechanisms. 2. Each of the opening / closing mechanisms includes a pair of conductive contacts that are in electrical contact with each other and an insulating unit that can be inserted and removed between the pair of conductive contacts. 2. The spinning machine having a spindle motor control system according to claim 1, wherein when the insulating unit is inserted, the insulating unit is separated and removed and comes into contact again. 3. Each of the opening and closing mechanisms includes a pair of conductive contacts and an opening and closing member slidably provided between the pair of conductive contacts, and the insertion member is slid by sliding the opening and closing member. 2. The spinning machine having a spindle motor control system according to claim 1, wherein the insulating portion and the conductive portion provided in the first and second pairs are selectively brought into contact with the pair of conductive contacts. 4. Each of the opening and closing mechanisms includes a pair of conductive contact terminals separated from each other, and a connecting member for electrically connecting the pair of conductive contact terminals when closed. A spinning machine having the spindle motor control system according to claim 1. 5. The braking device includes a friction piece for bringing the spindle into frictional contact with the spindle, a brake arm to which the friction piece is fixed, and an operation lever for moving the brake arm closer to or away from the spindle. 6. A device according to claim 1, further comprising: a support portion for rotatably supporting said operating lever portion; and a biasing means for biasing said brake arm in a direction away from said spindle. A spinning machine having the spindle motor control system described in any of the above. 6. The spindle motor control system according to claim 1, wherein the braking device includes a braking voltage power supply device for applying a braking DC voltage to the spindle motor. A spinning machine. 7. The spindle according to claim 6, wherein the DC voltage applied by the braking voltage power supply is obtained by rectifying three phases or any two phases of each of the three-phase power supply lines. A spinning machine having a control system. 8. The spindle motor control system according to claim 1, wherein the opening and closing of each of the opening and closing mechanisms, the braking of the braking device, and the release thereof are interlocked. Spinning machine. 9. A configuration in which the periphery of the stator windings constituting each of the spindle motors is solidified with a synthetic resin material, and the form of the synthetic resin material is formed so that a part or all of the opening and closing mechanisms can be attached. A spinning machine having the spindle motor control system according to any one of claims 1 to 8. 10. A plurality of spindles for pulling out elongated fibers from a lump of natural fibers or synthetic fibers and twisting the drawn fibers; the same number of spindle motors as the number of the spindles attached to each of the spindles; A spinning machine having a spindle motor control system including: an inverter power supply for supplying drive power to the spindle motor; and a three-phase power supply line for individually connecting the spindle motors and the inverter power supply. A pair of conductive contacts are provided in a state of being in electrical contact with each other at least in the middle of each of the two-phase power supply lines of the two-phase power supply lines, and the pair of conductive contacts are provided between the two. The circuit unit has a DC braking mode, a three-phase power supply cutoff mode, and a three-phase power supply. By setting at least one of the at least three modes of the supply mode and the DC weak braking mode, and operating the changeover switch, any one of the DC braking mode and the set at least one mode can be selected. The circuit unit in the DC braking mode is configured to brake by applying a DC voltage obtained from a braking voltage power supply device provided outside or inside the circuit unit to each of the spindle motors. The circuit unit in the three-phase power supply cutoff mode is configured to cut off three-phase AC power to each of the spindle motors, and the circuit unit in the three-phase power supply mode is
The circuit unit is configured to supply three-phase AC power to each of the spindle motors, and the circuit unit in the DC weak braking mode is applied with a DC weak voltage obtained from the braking voltage power supply device to each of the spindle motors. When the spindle is stopped, the respective spindles are prevented from rotating spontaneously.When the circuit unit is inserted to separate the pair of conductive contacts, the circuit unit becomes operable. On the other hand, a spinning machine having a spindle control system, wherein the pair of conductive contacts come into contact again after the circuit unit is extracted. 11. The braking voltage power supply device is configured to rectify three phases or any two phases of each of the three-phase power supply lines to obtain the DC voltage and the DC weak voltage. A spinning machine having the spindle control system according to claim 9. 12. A relay unit for electrically relaying the circuit unit and each of the pair of conductive contacts is configured to be freely inserted into and extracted from each of the pair of conductive contacts instead of the circuit unit, and 11. The relay unit according to claim 9, wherein the circuit unit is configured to be freely inserted into and removed from the relay unit, and is configured to insulate between the conductive contacts when the relay unit is independently inserted. A spinning machine having the spindle control system described in 1. 13. The method according to claim 13, wherein the periphery of the stator winding constituting each of the spindle motors is solidified with a synthetic resin material, and the form of the synthetic resin material is formed so that the pair of conductive contacts can be attached. 13. The method according to claim 10, wherein:
A spinning machine having the spindle motor control system described in any one of the above. 14. A plurality of spindles for extracting elongated fibers from a lump of natural fibers or synthetic fibers and twisting the extracted fibers; and the same number of spindle motors as the number of spindles attached to each of the spindles; A spinning machine having a spindle motor control system including: an inverter power supply for supplying drive power to the spindle motor; and a three-phase power supply line for individually connecting the spindle motors and the inverter power supply. A phase power supply line comprising a three-phase bare bus connected to the inverter power supply and a distribution line for connecting the three-phase bare bus to each spindle motor, and at least the three-phase bare bus made of an insulating material; A spindle motor embedded in the body and partially exposed from the case body. Spinning machine having a control system. 15. The apparatus according to claim 1, wherein at least an exposed portion of each of the three-phase bare buses is made flat.
2. A spinning machine having the spindle motor control system described in 2. 16. The three-phase bare bus bar exposed from the case body is provided with a detachable terminal for attaching and detaching the distribution line.
A spinning machine having the spindle motor control system described in 1. 17. A plurality of spindles for drawing out elongated fibers from a lump of natural fibers or synthetic fibers and twisting the drawn fibers; the same number of spindle motors as the number of spindle motors attached to each of the spindles; A spinning machine having a spindle motor control system including: an inverter power supply for supplying drive power to the spindle motor; and a three-phase power supply line for individually connecting the spindle motors and the inverter power supply. The phase power supply line is composed of a three-phase bare bus connected to the inverter power supply, and a distribution line for connecting the three-phase bare bus and each spindle motor, and at least a predetermined interval of the three-phase bare bus is provided in the case body A spinning machine having a spindle motor control system, wherein the spindle motor control system is arranged via a spinner. 18. The spinning machine according to claim 15, wherein an insulating material is filled between the three-phase bare buses.