JPH02461Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to the carriage drive device of a knitting machine.
In particular, the present invention relates to a carriage drive device that can change the movement stroke of the carriage in accordance with the desired course width of the knitted fabric.

(Prior Art) In this type of carriage drive device, a drive belt is rotated by the forward and reverse rotation of a drive motor, and the carriage, which is connected to the belt through a connecting body, moves in the left-right direction on the needle bed. It is designed to be slid by. The motor is equipped with a forward/reverse motion belt (hereinafter referred to as "forward/reverse motion belt") that simulates forward and reverse movement in accordance with the forward and reverse rotation of the drive belt so that the stroke of the carriage can be changed according to the course width of the knitted material. A stroke changing device mainly composed of a moving body (also referred to as a moving body) is connected to the stroke changing device.

This stroke changing device includes a signal generating means supported by the moving body, and a pair of signal generating means disposed near both ends of the forward and reverse moving body and activated when the signal generating means approaches the moving body due to movement. and a sensor, the rotational direction of the motor can be reversed based on the activation signal of each sensor, and the position of each sensor can be moved along the direction of movement of the forward/reverse moving body, It is now possible to change the stroke of the carriage.

Therefore, the signal generating means for the forward and reverse moving body needs to be installed in synchronization with the coupling body disposed on the drive belt and connected to the carriage. That is, if the motor is driven in a state where the coupling body and the signal generating means are not synchronized, failures or damage to various parts will occur due to excessive movement of the signal generating means.

Conventionally, the signal generating means for the above-mentioned forward/reverse moving body has been fixed after synchronizing with the connecting body.

(Problems to be Solved by the Invention) When attaching the signal generating means to the above-mentioned forward/reverse moving body, it is difficult to synchronize the coupling body and the signal generating means, resulting in poor assembly workability. There was a problem. This not only causes a decrease in productivity and increases costs, but also makes disassembly and repair work in case of some kind of breakdown or inspection complicated. It was also predicted that misalignment or incorrect installation of the signal generating means would occur from time to time.

(Means for Solving the Problems) This invention to solve the problems in the above-mentioned conventional technology is based on a carriage that is installed on the needle bed so as to be able to slide left and right, and a carriage that corresponds to approximately both left and right sides of the needle bed. A drive belt that rotates in the forward and reverse directions when the drive wheel is driven by a drive motor that is hooked around the drive wheels and driven wheels that are arranged as follows, and that can rotate in the forward and reverse directions, and a straight portion of the drive belt. and a coupling body that is connected to the carriage and moves the carriage back and forth to the left and right in accordance with the forward and reverse rotation of the drive belt, and a connection body that is operatively connected to the motor and that moves the carriage back and forth in accordance with the forward and reverse rotation of the motor. A forward-reverse motion belt (also referred to as a forward-reverse motion body) that moves forward and backward, and a device that is arranged so as to be changeable in the direction of movement in the vicinity of the forward-reverse motion belt, and determines the horizontal movement end position of the carriage. a support member supported by the forward and reverse movement belt and having a signal generating means for activating the position sensor when the position sensor corresponds to the movement of the forward and reverse movement belt; , a carriage drive device comprising: a motor control circuit that reverses the rotational direction of the motor according to a starting signal from the position sensor; A pair of locking protrusions are provided for setting the right and left movement end positions of the carriage, and the support member is connected to the forward and reverse movement belt,
Supported so as to be relatively movable in the forward and reverse movement directions by contact means that make frictional contact, the belts are placed at positions corresponding to both sides of the installation range of the forward and reverse movement belt, and which correspond to left and right movement end positions of the carriage. The device is provided with a pair of stoppers that engage with the support member at the position where each position sensor is arranged to stop the movement of the support member.

(Function) In the above-described means, when the drive wheel is driven by the drive motor, the drive belt is rotated in forward and reverse directions, and the forward and reverse motion belt is simulated in forward and reverse motion with the rotation of the drive belt. be done.

As the drive belt rotates, the carriage is reciprocated via the connecting body.

Further, as the forward/reverse motion belt moves, a support member having a signal generating means is moved. When the signal generating means activates the sensor in response to the position sensor, the motor control circuit reverses the rotating direction of the motor based on the activation signal, thereby reversing the direction of movement of both belts. be done.

Therefore, when synchronizing the drive belt and the forward/reverse motion belt, each position sensor is placed at a position corresponding to the left/right movement end position of the carriage.
The motor is driven to rotate both the drive belt and the forward/reverse motion belt. Then, with the support member abutting one of the stoppers, both belts are further rotated until the connecting body abuts the locking protrusion. As a result, the support member is relatively slid on the forward/reverse motion belt against the frictional resistance of the contact means, and the signal generating means on the forward/reverse motion belt is at a position synchronized with the connecting body on the drive belt. The position will be adjusted automatically.

(Example) An example of this invention will be described below with reference to the drawings. For the explanation, please refer to Figure 1, which shows a partially cutaway front view of the main parts of the carriage drive device of the knitting machine, Figure 2, which shows a plan view of the same, and Figure 3, which shows a schematic perspective view of the same. 4, which shows a schematic front view of the knitting machine.

A needle bed 1 of a knitting machine A is installed on a table 2, and a carriage 3 is installed on the needle bed 1 so as to be slidable in the left and right direction.

The machine frame 5 is attached to the table 2 via the stand 4.
is constructed so as to be located above the needle bed 1. This machine frame 5 is provided with a carriage drive device B, which will be described below.

A drive motor 6 equipped with a reduction gear mechanism 7 is disposed at the front right end of the machine frame 5 . An output shaft 9 with an output gear 8 in the reduction gear mechanism 7 of the drive motor 6 is configured to be rotated in forward and reverse directions by electrical conversion, and the rear end of the output shaft 9 protrudes into the machine frame 5. At the same time, its front end protrudes forward of the motor case 10 of the motor 6. Note that the drive motor 6 is housed in the housing 11 together with a stroke changing device B1 that will be described later.

A drive wheel 12 is provided at the rear end of the output shaft 9 of the drive motor 6.
is fixed. Further, a driven wheel 13 is rotatably supported at the left end of the machine frame 5 via a support shaft 14 .

A drive belt 15 is hung between the drive wheel 12 and the driven wheel 13. On the lower side of the drive belt 15,
A connecting body 16 having a bifurcated connecting portion 17 formed at its lower end is fixed. The connecting portion 17 is engaged with the handle 3a of the carriage 3, and the carriage 3 is reciprocated on the needle bed 1 in conjunction with the forward and reverse rotation of the drive belt 15 driven by the drive motor 6. This is how the organization is accomplished.

At the bottom of the machine frame 5, a pair of locking protrusions 18,
18 are provided. Each locking protrusion 18, 18
collides with the connecting body 16 that has reached the left and right moving ends and prevents the connecting body 16 from moving. That is,
The maximum stroke of the connecting body 16 is set to a predetermined amount by the locking protrusions 18, 18.

Next, the stroke changing device B1 adjacent to the left side of the drive motor 6 will be described. On the left front side of the motor case 10 of the drive motor 6,
The right end portion of the elongated holding frame 19 is attached with screws or the like. The holding frame 19 includes a vertical main plate 20 attached to the motor case 10, an upper plate 21 bent forward from the upper edge of the main plate 20, and a lower edge of the main plate 20. A lower plate portion 22 is bent forward from the lower plate portion 22, and a guide flange 23 is bent downward from the front edge of the lower plate portion 22.
and side plate parts 24, 24 bent forward from the left and right edges of the main plate part 20 (see FIGS. 7 and 9).

Regarding the drive mechanism of the stroke changing device B1,
This will be described with reference to FIGS. 5 and 6. Holding frame 1
The drive motor 6 is mounted on the right end of the main plate 20 of 9.
An opening hole 25 located in front of the output shaft 9 is opened, and the drive gear 2 is inserted through this opening hole 25.
6 is provided at the front end of the output shaft 9. A small gear 27 that meshes with the left side of the drive gear 26 is rotatably supported on the main plate portion 20 of the holding frame 19 on a shaft 28, and a large gear 3 that meshes with the left side of the small gear 27.
A drive sprocket 29 having a diameter of 0 is rotatably supported on a shaft 31. Further, the holding frame 19
A driven sprocket 3 is located at the left end of the main plate 20 of the
2 is rotatably supported on a shaft 33.

Drive sprocket 29 and driven sprocket 32
A forward/reverse moving belt 34 having internal teeth 35, which is a forward/reverse moving body, is hung over the belt. The forward/reverse motion belt 34 is rotated by the drive motor 6 in the same direction as the forward/reverse rotation of the drive belt 15 .

A guide rod 36 located in front of the lower side of the forward/reverse movement belt 34 is installed on the left and right side plate portions 24, 24 of the holding frame 19. A position sensor (described later) 4 is mounted on the guide rod 36.
A pair of left and right stroke adjusting members 37,
37 are each slidably provided.

Regarding the stroke adjustment member 37, Figs. 9 to 1
This will be explained with reference to Figure 1. Stroke adjustment member 37
A substantially U-shaped guide portion 38 formed at the lower end of the
is engaged with the guide flange 23 of the holding frame 19 so as to be slidable in the left-right direction. Note that protrusions 39 and 40 protruding from the opposing surface of the guide portion 38
are in contact with the front and rear surfaces of the guide flange 23, respectively, and the stroke adjusting member 37 is prevented from rotating.

A knob portion 41 that protrudes forward is formed on the upper portion of the stroke adjustment member 37 . The knob portion 41 is exposed at the front surface of the housing 11 through the oblong slit 11a of the housing 11, and is operated to move in the left-right direction by the knitting machine user.

A fitting protrusion 42 having a fitting hole 43 opening on the front side is formed approximately in the center of the rear side of the stroke adjusting member 37 . Further, on the front surface of the stroke adjusting member 37, left and right locking pieces 44, 44, which are located on the left and right sides of the fitting hole 43 and have locking portions 45 on their tips, are protruded, respectively. Furthermore, a locking protrusion 46 is protruded rearward from the upper end of the stroke adjustment member 37.

The center piece of a substantially T-shaped printed circuit board 47 is fitted into the fitting hole 43 of the fitting protrusion 42, and the engaging pieces 44, 4 are fitted to the left and right side pieces of the board 47.
4, and the same board 47 is attached to the stroke adjustment member 37. A position sensor 48 made of a Hall element is fixed onto the tip of the central piece of the printed circuit board 47, and conductive wires 49 to 49 are appropriately wired to each piece of the printed circuit board 47.

Further, a support member 50 equipped with a permanent magnet 56 serving as a signal generating means is provided on the lower side of the forward/reverse motion belt 34.

The support member 50 will be described with reference to FIGS. 5 to 8. The support member 50 includes a front plate 51, a guide protrusion 52 protruding from the center of the back surface and having a mounting recess 53 on the upper surface, and cylindrical guide protrusions 54, 54 protruding from the left and right ends of the back surface. The guide protrusion 52 includes an engaging protrusion 55 formed vertically on the distal end surface (rear side surface) of the guide protrusion 52 . Note that the guide protrusion 21 and the guide protrusion 54 constitute a contact means that makes frictional contact with the forward/reverse motion belt 34. The front plate 51 and the guide protrusion 52 of the support member 50 are formed to be able to pass between the fitting protrusion 42 and the locking protrusion 46 of the stroke adjusting member 37.

A permanent magnet 56, which is a signal generating means, is fitted into the mounting recess 53 of the support member 50. The forward/reverse motion belt 34 has its upper surface (inner surface) aligned with the guide protrusions 54, 54 of the support member 50.
The guide protrusion 52 is engaged in a meandering manner so that the guide protrusion 52 contacts the lower side thereof and its lower surface (outer surface) contacts the upper side of the guide projection 52 . Therefore, the support member 50 is supported so as to be movable relative to the forward/reverse motion belt 34 against the frictional resistance caused by the contact means. Note that the support member 5 supported by the forward/reverse movement belt 34
The end face of the engagement protrusion 55 of No. 0 is in contact with the front surface of the main plate portion 20 of the holding frame 19, and the end face of the engagement protrusion 55 of
The rotation of the main plate section 20 causes the main plate section 20 to slide along the front surface thereof.

As shown in FIG.
It is incorporated into 9. When the permanent magnet 56 approaches one of the position sensors 48, 48, the sensors 48, 48
Generates a start signal by sensing the magnetic field of
This activation signal is input to the motor control circuit 57 through the amplifier circuits 58, 58, and the control circuit 57 is operated based on the signal, so that the rotation of the drive motor 6 is reversed.

Further, a pair of stoppers 60, 60 are protruded forward from the lower left and right sides of the main plate portion 20 of the holding frame 19. The stoppers 60, 60 are connected to the support member 5.
0 and prevents the member 50 from moving. Further, the stroke adjustment member 37,
Each of the locking protrusions 46, 46 of 37 is also connected to each stopper 6.
0 and 60, and movement of the adjustment member 37 is blocked at a position corresponding to the moving end position of the support member 50. In this example, the maximum stroke of the support member 50 is set to about one-tenth of the maximum stroke of the connecting body 16.

Furthermore, in the upper left part of the housing 11, there is a stage counter 6 that can count the number of reversals of the forward/reverse motion belt 34.
1, and a main board (not shown) that is electrically connected to the printed circuit boards 47, 47 of the stroke adjusting members 37, 37, etc. are built therein.

In the carriage drive device described above, when organizing the carriage 3, the drive motor 6 is driven to rotate the drive belt 15, and as the drive belt rotates, the belt moves forward and backward. 34 is rotated in a simulated manner. Then, the permanent magnet 56 of the support member 50
7, the position sensors 48, 48 that sense the magnetism of the same magnet 56 generate a starting signal, and the motor control circuit 57 operates based on this starting signal. The rotation of the drive motor 6 is reversed. By repeating this, the carriage 3 is slid back and forth in the left-right direction along the needle bed 1. By appropriately moving the positions of the stroke adjustment members 37, 37 in the left and right directions, the reversal timing of the drive motor 6 can be changed, and the stroke of the carriage 3 can therefore be adjusted by an amount corresponding to the course width of the knitted material. will be changed to

By the way, when assembling the permanent magnet 56 to the forward/reverse motion belt 34, a hole is placed on the upper surface (inner surface) of the forward/reverse motion belt 34 below the guide protrusions 54, 54 of the support member 50 into which the permanent magnet 56 is incorporated. The movement belt 34 is engaged in a meandering manner so that the lower surface (outer surface) of the movement belt 34 is in contact with the upper side of the guide protrusion 52 of the member 50, and is supported with respect to the forward and reverse movement belt 34. The member 50 is supported so as to be relatively movable against frictional resistance.

Next, with the position sensor 48 and the stroke adjustment member 37 disposed at the left and right end of the movement, the drive motor 6 is driven to rotate the drive belt 15 and the forward/reverse motion belt 34 together. Then, with the engagement protrusion 55 of the support member 50 engaged with one (for example, the left) stopper 60, the both belts Rotate 15 and 34. Then, the support member 50 slides relatively on the forward/reverse motion belt 34 against the frictional resistance caused by the contact means, and is moved to a position in synchronization with the connecting body 16 on the drive belt 15. That is, when the connecting body 16 abuts against the locking protrusion 18 on the left side, the support member 50 is positioned in synchronization with the connecting body 16.

As described above, the permanent magnet 5 on the forward/reverse motion belt 34 relative to the coupling body 16 on the drive belt 15
6 can be easily and reliably synchronized.

Note that since the signal generating means is constituted by the permanent magnet 56, and the position sensors 48, 48 are constituted by Hall elements that sense the magnetism of the permanent magnet 56 and generate the activation signal, other Compared to the above detection sensor, it is possible to prevent malfunctions and failures caused by dust such as knitting yarn waste, and it is also superior in durability and reliability, and is small and inexpensive.

(Effect of the invention) In other words, this invention provides a carriage drive device equipped with a forward-reverse motion belt that moves in a simulated forward and reverse direction as a result of the forward and reverse rotation of a drive belt equipped with a connecting body that reciprocates the carriage. The signal generating means on the counter-moving belt can be automatically positioned in synchronism with the coupling on the drive belt. Therefore, when attaching the signal generating means to the forward/reverse motion belt, it is possible to easily and reliably synchronize the signal generating means with the coupling member on the drive belt, and the assembly of the signal generating means can be easily and reliably synchronized. This has the effect of improving workability. This is useful for improving productivity and reducing costs, and is also convenient because it facilitates disassembly and repair work in case of any kind of breakdown or inspection.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a partially cutaway front view of the main part of the carriage drive device of the knitting machine, Figure 2 is a plan view of the same, Figure 3 is a schematic perspective view of the same, and Figure 4 is a schematic front view of the knitting machine. , FIG. 5 is a partially cutaway front view showing the support member together with the driving mechanism of the forward/reverse motion belt, FIG. 6 is a plan sectional view thereof, FIG. 7 is a sectional view taken along the line -- in FIG. 5, and FIG. FIG. 9 is a cross-sectional view taken along the line -- in FIG. 1, FIG. 10 is a front view of the stroke adjustment member, FIG. 11 is an exploded perspective view of the same, and FIG. 12 is a motor control circuit. FIG. 2 is a block diagram of an electric circuit including a DESCRIPTION OF SYMBOLS 1... Needle bed, 3... Carriage, 6... Drive motor, 15... Drive belt, 34... Forward/reverse motion belt (forward/reverse motion body), 48... Position sensor, 56
... Permanent magnet (signal generating means), 57 ... Motor control circuit, 60 ... Stopper.

Claims (1)

[Claims for Utility Model Registration] (1) A carriage 3 that is installed on the needle bed 1 so as to be able to slide left and right, and a driving wheel 12 and a driven wheel 13 that are arranged corresponding to substantially the left and right sides of the needle bed 1. It is hung on
A drive belt 15 rotates forward and backward when the drive wheel 12 is driven by a drive motor 6 that can rotate forward and backward, and a straight portion of the drive belt 15 is connected to the carriage 3, and the drive wheel 12 is connected to the carriage 3. A connecting body 16 that reciprocates the carriage 3 left and right according to the forward and reverse rotation of the belt 15, and the motor 6.
a forward/reverse movement belt 3 which is operatively connected to the motor 6 and moves forward and backward in accordance with the forward and reverse rotation of the motor 6;
4, a pair of position sensors 48 which are arranged in the vicinity of the forward/reverse movement belt 34 so as to be changeable in its movement direction, and for determining the left/right movement end position of the carriage 3; a supporting member 50 supported by the belt 34 and having a signal generating means 56 for activating the position sensor 48 when corresponding to the position sensor 48 as the belt 34 moves in forward and reverse directions; and activating the position sensor 48; In a carriage drive device equipped with a motor control circuit 57 that reverses the rotational direction of the motor 6 in accordance with a signal, a motor control circuit 57 is provided with a motor control circuit 57 that abuts against the coupling body 16 near the drive wheel 12 and the driven wheel 13, respectively. A pair of locking protrusions 18 are provided for setting the right and left movement end positions of the carriage 3, and the support member 50 is connected to the forward and reverse movement belt 3.
4, the carriage 3 is supported so as to be movable relative to the forward and reverse movement directions by contact means 52 and 54 that are in frictional contact with each other. A knitting machine characterized by comprising a pair of stoppers 60 that engage with the support member 50 to stop the movement of the support member 50 at positions where each of the position sensors 48 is disposed corresponding to left and right movement end positions of the knitting machine. Carriage drive. (2) The signal generating means is constituted by a permanent magnet 56, and each of the position sensors 48 is constituted by a Hall element that senses the magnetism of the permanent magnet 56 and generates an activation signal. A carriage drive device for a knitting machine as set forth in claim 1 of the utility model registration claim.