JPH0545507B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a contact roller of a yarn winding machine, and more specifically, a contact roller that rotates in pressure contact with a bobbin attached to a bobbin holder or a yarn wound on the bobbin. The present invention relates to a device for forcibly driving a motor using a separate drive mechanism.

(Prior Art) Conventionally, as methods for forcibly driving a contact roller, there are, for example, a method in which the contact roller uses an out-rotor motor system, and a method in which the contact roller is forcibly driven by a separate motor.

As an example of an out rotor motor type (hereinafter referred to as the former) for forcibly driving a contact roller, the one shown in FIG. 5 is known. (Refer to Special Publication No. 50-21582). In FIG. 5, reference numeral 1 denotes an outrotor motor, to which a rotor 3 is fixed to a roller 2 and a stator 5 is fixed to a shaft 4. Furthermore, bearings 6 and 7 are disposed near both ends of the shaft 4, and the inner diameters of the bearings 6 and 7 are engaged with the shaft 4, respectively. The outer diameter of the bearing 6 is engaged with the roller 2 via the housing 8 and the mounting seat 9, and similarly, the outer diameter of the bearing 7 is engaged with the roller 2 via the housing 10 and the mounting seat 11. Coil 1 wound around stator 5
One end of a lead wire 13 is connected to the shaft 2, and the other end of the lead wire 13 is led out through a passage formed inside the shaft 4. Note that 14 is a rotation detector for detecting the number of rotations of the roller 2.

On the other hand, as an example of a device in which the contact roller is forcibly driven by a separate motor (hereinafter referred to as the latter), there is a device as shown in FIG. 6, for example. In the figure, 21 is a contact roller, and the contact roller 21 is engaged with a case 26 via bearings 22 and 23. A motor 27 for forcibly driving the contact roller 21 is arranged in series on the coaxial line of the contact roller 21.
The shaft 28 and the contact roller 21 are connected by a universal joint 29. Further, 30 is an electromagnetic pick-up, and the electromagnetic pick-up 30 is driven by a motor 2.
The rotation speed of the contact roller 21 is indirectly detected by detecting the rotation speed of the spur gear 31.

(Problems to be Solved by the Invention) However, with regard to the contact rollers of such conventional yarn winding machines, both the former and the latter devices have the following problems due to structural reasons. There is. Below, we will discuss the former and the latter problems.

Former () In the former type of out rotor motor 1 in which both ends of the shaft 4 are fixed to a case (not shown) to rotate the roller 2, the stator 5 is fixed to the shaft 4, so the shaft It was not possible to increase the outer diameter of the shaft 4, and the shaft 4 had a small diameter and a long length.
The natural frequency of a single element becomes low. Therefore,
As shown in FIG. 7, the relationship between the rotational speed N of the bobbin holder on the winding side and the outer diameter D of the yarn (package) to be wound is as shown in FIG. A point where the natural frequency intersects with the natural frequency may occur, and a resonance phenomenon of the shaft 4 using the rotational frequency of the bobbin as an excitation source is induced, which is dangerous.

() Also, if the outer diameter of the shaft 4 is made smaller and the natural frequency of the shaft 4 is lowered, stresses generated in the shaft 4 (for example, bending stress due to the weight of the stator 5, the weight of the shaft 4, and when the outrotor motor 1 is started) Not only is this dangerous because the torsional stress of the shaft 4
There is a problem that the rotor 3 and stator 5 come into contact with each other due to the bending.

() If the outer diameter of the shaft 4 is increased, the stator 5, rotor 3, and roller 2 will also inevitably have larger diameters, so the external resistance (windage loss, etc.) that acts on the outer periphery of the roller 2 during rotation will increase, and As the inertia of the rollers 2 and rotor 3 increases, the starting torque when starting the outrotor motor 1 has to be increased, resulting in a large energy loss during starting and operation.

() The weight of the outrotor motor 1 is heavier (approximately 2 to 3 times) than the weight when the free roller is driven by a separate motor, making it difficult to attach and remove the outrotor motor 1 from the case.

() When performing surface treatment on the outside of the roller 2 (plating, ceramic coating, etc.), it is very important to prevent the plating liquid from entering the inside of the roller 2, but the internal structure of the out rotor motor 1 Because the rotor is complex (there are iron cores, permanent magnets, etc. inside the rotor), prevention measures are difficult and require skill.

() The outrotor motor system itself is expensive and poses a problem in terms of cost.

For the reasons () to () above, it has been extremely difficult to respond to higher speeds and longer lengths using the outrotor motor system.

The latter Contact roller 21 as described above in FIG.
A motor 27 that drives the contact roller 21 is arranged separately on the same axis as the shaft 28 of the motor 27.
Since the contact roller 21 and the contact roller 21 are connected,
The contact roller 21 and the motor 27 have become considerably long in the axial direction, resulting in poor workability. In addition, since the motor 27 is bored in the case 26, it is necessary to increase the rigidity of the entire device, and as the device needs to be larger, there are problems such as vibrations easily occurring during high-speed rotation. .

As described above, with the current technology (that is, conventional devices), there is room for further improvement in terms of improving safety, workability, cost, etc. in both the former and latter devices.

(Objective of the Invention) Therefore, the present invention aims to shorten the total length of the contact roller and motor (distance between the bearings that support the contact roller) in the attached state, thereby improving safety, operability, and workability, as well as improving the contact roller. The aim is to increase speed, length, and cost reduction.

(Means for Solving the Problems) In order to achieve the above object, the contact roller of the yarn winding machine according to the present invention rotates in contact with the bobbin mounted on the bobbin holder or the yarn wound on the bobbin. In a contact roller of a yarn winding machine in which the contact roller is forcibly driven by a separate drive mechanism, the contact roller and the drive mechanism that drives the contact roller are disposed coaxially, and the drive shaft of the drive mechanism and a contact roller are connected at one end side of a drive mechanism, at least the one end side portion of the drive mechanism is disposed inside the contact roller, and the contact roller is supported at both ends by a pair of bearings arranged at the one end side of the drive mechanism. In addition, a contact roller for a yarn winding machine is provided, wherein the bearing closer to the drive mechanism of the pair of bearings is engaged with a frame portion constituting the one end side of the drive mechanism. .

(Function) In the present invention, the drive shaft of the drive mechanism and the contact roller are connected at one end of the drive mechanism, and at least the one end portion of the drive mechanism is disposed inside the contact roller. Further, the contact roller is supported at both ends by a pair of bearings disposed at the one end of the drive mechanism, and the bearing closer to the drive mechanism among the pair of bearings is attached to a frame portion forming the one end of the drive mechanism. engaged with.

Therefore, the total length of the contact roller and motor in the attached state is shortened, safety, operability, and workability are improved, and the contact roller can be made faster, longer, and lower in cost.

(Example) Hereinafter, the present invention will be explained based on the drawings.

1 to 4 are diagrams showing an embodiment of an automatic switching winding machine to which a contact roller according to the present invention is applied. First, the configuration will be explained. FIG. 2 is a front view of the automatic switching winding machine, FIG. 3 is a side view, and FIG. 4 is an overall configuration diagram. In Figures 2 and 3, 41
4 is a frame of the automatic switching winding machine, and 42 is a turret table rotatably mounted on the frame 41. Two bobbin holders 43 and 44 are disposed on the turret table 42, and the bobbin holders 43 and 44 are rotationally driven by induction motors 45 and 46 provided within the frame 41 and controlled by an inverter. On the other hand, the turret table 42 rotates half a turn in response to a turret command after the yarn winding is completed, and the relative positions of the bobbin holders 43 and 44 are exchanged. Further, bobbins 47, 48 are attached to the bobbin holders 43, 44, and the bobbins 47, 48 are attached to the bobbin holders 43, 44.
48 rotates together with the bobbin holders 43 and 44.
In the illustrated state, a rotational driving force is applied to the bobbin holder 43, and the bobbin holder 43 forms a package (not shown) on the circumference while winding the yarn, contacts the contact roller 49, and rotates in conjunction with the contact roller 49. do. The contact roller 49 applies appropriate surface pressure to the package when winding the yarn, and is rotatably attached to the case 50. The structure of the contact roller 49 will be described in detail in FIG. 1, which will be described later. Further, a traverse unit 51 is provided on the right side of the contact roller 49 in the figure, and the traverse unit 51 traverses the yarn during the yarn winding process. The case 50 and the traverse unit 51 are guided by a slide shaft (not shown) and are installed in a slide block 52 that is movable in the vertical direction.

In FIG. 4, the contact roller 49 is connected to a shaft 54 of a motor (in this embodiment, an induction motor) 53 via a universal joint 89, which will be described later, and the motor 53 is connected to an inverter 56 via a relay 55. Similarly, a motor 57 disposed in the traverse unit 51 is connected to an inverter 59 via a relay 58, and an induction motor 45 is connected to an inverter 59 via a slip ring 60 and a relay 63.
Connected to 4. Further, the induction motor is connected to an inverter 62 via a slip ring 60 and a relay 61. Although induction motors are used for the motor 53 that moves the contact roller 49 and the induction motors 45 and 46, synchronous motors, DC motors, etc. may also be used.

Output control of each inverter 56, 59, 62, 64 is performed based on commands from a controller 65. A signal from an electromagnetic pickup (detector) 66 is input to the controller 65, and the peripheral speed of the contact roller 49 is is controlled to be constant. The electromagnetic pickup 66 is disposed close to a spur gear 67 connected to the shaft 54 of the motor 53, and detects the rotation speed of the spur gear 67 to indirectly detect the rotation speed N of the contact roller 49.

The structure of the contact roller 49 is shown in FIG.

In FIG. 1, the contact roller 49 is arranged coaxially with the motor 53, and the drive shaft of the motor 53 and the contact roller 49 are connected at one end side of the motor 53 (the right side in FIG. 1), and at least the right side of the motor 53 is arranged inside the contact roller 49. In addition, a pair of bearings 68 and 69 arranged on the right side of the motor 53 cause the contact roller 4 to
9 is supported at both ends, and a pair of bearings 68,
Of the bearings 69 , the bearing 68 that is closer to the motor 53 is engaged with a frame 71 that constitutes the right side portion of the motor 53 . In addition, the outer diameter of the bearing 69 is
2 to the housing 73, and the housing 73 is engaged to the case 50. On the other hand, a frame 74 of the motor 53 is fixed to the case 50 with hexagon socket head bolts 75, and a stator 76, a coil 77, a rotor 78, a shaft 54, etc. are arranged inside. The shaft 54 is supported by a bearing 79.
The outer diameter of the frames 71 and 82 is
is engaged with. Contact roller 4 on shaft 54
A universal joint 83 is engaged on the 9 side (right side in the figure) with a hexagon socket set screw 84 and a parallel key 85.
A universal joint 87 is attached to the contact roller 49 with a hexagon socket head bolt 86. Furthermore, the universal joints 83 and 87 engage with the elastic body 88 to transfer the driving force of the motor 53 to the contact roller 4.
It is transmitted to 9. The above-mentioned universal joint 83, hexagon socket set screw 84, parallel key 85, hex socket bolt 86, universal joint 87, and elastic body 88 constitute a universal joint 89 as a whole. On the other hand, axis 5
A spur gear 67, an electromagnetic pick-up (detector) 66, and a brake drum 90 are arranged at the other end of the 4. It is formed to be engaged with the shaft 54 and rotate integrally with the shaft 54. In addition, the cover 94
is fixed to the case 50 with hexagon socket head bolts (not shown).

In the above configuration, the rotation speed of the contact roller 49 that rotates in contact with the bobbin 47 or the yarn wound on the bobbin 47 is controlled by the electromagnetic pickup 6.
6, and the controller 65 feeds back the frequency to the inverter 64 so that the rotation speed becomes a predetermined value. The frequency of the inverter 56 is controlled by the controller 65 to prevent windage damage of the contact roller 49 during winding.
Compensates for shaft loss.

In this way, in this embodiment, at least one end side of the motor that drives the contact roller is disposed inside the contact roller, so the total length (length in the axial direction) of the contact roller and motor in the attached state is It's getting shorter. Therefore, the operability and workability can be greatly improved, and the rigidity of the case in which the contact roller is disposed can be reduced, making it possible to downsize the device. Moreover, since the structure is simple, costs can be reduced. Further, the contact roller is supported at both ends by a pair of bearings disposed on the one end side of the motor, and the one of the pair of bearings that is closer to the motor is engaged with a frame portion constituting the one end side portion of the motor. Therefore, the distance between the bearings of the contact roller can be shortened, the rigidity of the contact roller can be increased, the natural frequency can be increased, and the maximum allowable rotation speed of the contact roller can be increased. As a result, the contact roller can be made faster and longer.

In this embodiment, the explanation is based on control that sets the circumferential speed of the contact roller 49 to a predetermined value; however, this is not limited to this, and the control may be replaced with control that sets the tension of the yarn to be wound to a predetermined value. good.

In addition, in order to compensate for windage damage and shaft loss of the contact roller 49, the contact roller 49 is connected to the motor 53.
Although the embodiment has been described in which the contact roller is forcibly driven by the bobbin, the present invention is also applicable to a friction drive system in which the contact roller is brought into pressure contact with the bobbin or the yarn wound on the bobbin, and the contact roller is driven only by the contact roller. Applicable.

Furthermore, although the outer periphery of the contact roller 49 is smooth, it may have a plurality of annular stepped portions, and other known universal joints may be used for the flexible shaft joint 89 using an elastic body. Good too.

Furthermore, although cushioning materials 70, 72, and 80 are used to support the bearings in this embodiment, rigid support without using cushioning materials may also be used. It goes without saying that it may be on the opposite side to that in this embodiment. The motor is not limited to an electric type, and may be of other types, such as an air motor.

(Effects) In the present invention, at least one end side portion of the motor that drives the contact roller is disposed inside the contact roller, and one of the pair of bearings disposed at one end side of the drive mechanism so as to support the contact roller at both ends. Since the bearing closer to the drive mechanism is engaged with the frame part that constitutes the one end of the drive mechanism, the total length of the contact roller and motor installation state (distance between the bearings that support the contact roller) is shortened. It is possible to improve safety, operability, and workability, and to achieve higher speed, longer length, and lower cost of the contact roller.

[Brief explanation of the drawing]

1 to 4 are diagrams showing one embodiment of the contact roller of the yarn winding machine according to the present invention, FIG. 1 is a configuration diagram of the contact roller, and FIG. 2 is an automatic Figure 3 is a front view of the switching winder, Figure 3 is its side view, Figure 4 is its overall configuration, Figure 5 is a configuration diagram of a conventional out rotor motor type contact roller, and Figure 6 is a conventional contact roller. FIG. 7 is a diagram for explaining the conventional operation. 43, 44... Bobbin holder, 47, 48...
Bobbin, 49...contact roller, 53...motor, 68, 69...bearing, 71...frame.

Claims (1)

[Claims] 1. A contact roller of a yarn winding machine in which a contact roller that rotates in contact with a bobbin attached to a bobbin holder or a yarn wound on the bobbin is forcibly driven by a separate drive mechanism. A roller and a drive mechanism for driving the contact roller are disposed coaxially, the drive shaft of the drive mechanism and the contact roller are connected at one end of the drive mechanism, and at least a portion of the one end of the drive mechanism is placed inside the contact roller. The contact roller is supported at both ends by a pair of bearings disposed on the one end side of the drive mechanism, and the one of the pair of bearings that is closer to the drive mechanism is connected to a frame forming the one end side of the drive mechanism. A contact roller for a yarn winding machine, characterized in that the contact roller is engaged with a portion of the yarn winding machine.