JPH0643658B2 - Drive for knitting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drive device for a knitting machine, and more particularly to a yarn swing drive device that drives a yarn swing, a stitch feed, and a top hook by a servomotor.

<Prior Art> A knotting point of a knitting machine is provided with a yarn swinging mechanism for moving a warp yarn up and down, back and forth, and left and right, and an upper hook for looping the warp yarn. The thread swing mechanism is configured such that the thread swing is fixed on a movably supported thread swing frame, and holes are formed in the thread swing at predetermined intervals to support and pass a large number of warp threads. A drive mechanism is provided for moving the yarn swing up and down and back and forth and right and left just after the time and the end of the knot.

This conventional yarn swinging drive mechanism is provided with a cam follower in each cam groove or cam surface of a vertical swing cam (main cam), a horizontal swing cam, and a front-back swing cam fixed to a main shaft of a knitting machine or a shaft linked to the main shaft. Via the levers and links to connect the thread swing shafts for up / down, front / rear, and left / right driving, and further through the levers and links fixed to the thread swing shafts, the thread swing frame. It is a structure that moves up and down, front and back and left and right at predetermined timing.

On the other hand, the upper hook drive mechanism is such that a large number of upper hooks are rotatably arranged vertically at regular intervals on a support frame supported by a longitudinal swing shaft, and a pinion is fixed to the shaft of the upper hook.
During the knotting process, a drive mechanism for rotating each upper hook is provided for swinging the support frame back and forth at a predetermined timing.

This conventional upper hook drive mechanism has an upper hook rotation cam and an upper hook front-back swing cam fixed to a main shaft of a braiding machine or a shaft linked to the main shaft, and a lever is provided in a cam groove or a cam surface thereof via a cam follower. Are engaged with each other and connected to the front-back swing shaft fixed to the rotation driving bar of the upper hook or the support frame of the upper hook via each lever or link, and the rotation of the cam causes the upper hook to move back and forth at a predetermined timing. It is a structure that moves or rotates around its axis.

<Problems to be Solved by the Invention> As described above, in the conventional thread swing and upper hook drive mechanism, the thread swing or upper hook is moved up and down, front and back through each cam fixed to the main shaft or the shaft linked to the main shaft and the cam follower. Since the structure is moved to the left and right, the rotational load of the main spindle is extremely large, a large amount of power is required, and the operating speed of the knitting machine is limited, which impedes the increase in the knitting speed. .

Furthermore, if a new braiding method is developed and it is attempted to carry out the braiding method with an existing braiding machine, many cams need to be newly manufactured or modified, and the cams need to be renewed. When manufactured or modified, it is necessary to accurately adjust the cam surface and cam groove in order to accurately set the timing of movement in each direction of thread swing, and such adjustment work requires many highly skilled techniques. There was a problem that required time.

The present invention has been made to solve the above problems, and can reduce the load on the main shaft of a knitting machine, enable high-speed operation, and easily control yarn swinging in response to changes in the knitting method and It is an object of the present invention to provide a drive device for a knitting machine that can be rapidly performed and that can knit a turtle shell net or a special net with gradually changing mesh.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the drive device of the present invention is configured so that the yarn swinging frame is moved up and down and is linked to the lever via a connecting member. A vertical servomotor that rotationally drives the drive shaft, a front-back servomotor that rotationally drives the front-rear drive shaft that is connected to the thread swing frame via a lever and a rod, and moves the thread swing back and forth. Left and right servo motors that rotate the screw shafts that are screwed into the left and right drive members that are connected to the thread swing frame, and the eye feed roll that drives the knotted net to rotate. Servo motors, motor drive circuits that are connected to each servo motor and that control the rotation of each servo motor in response to an input pulse signal, and vertical movement, forward / backward movement, and left / right movement of yarn swing during knitting. Position data corresponding to the rotation angle of the feed roller and each position data memory in which the position data corresponding to the rotation angle of the feed roller is stored in advance, and the moving direction data of the vertical movement of the thread swing, the longitudinal movement, and the lateral movement are stored in advance. A direction data memory, each position data memory, and control means for reading data by designating an address from the direction data memory at a fixed timing and sending the data to the motor drive circuit of each servo motor. It

<Operation> First, position data for the vertical, forward, backward, left and right of the yarn swing at the time of the knitting net, position data corresponding to the index feed rotation angle, and direction data for each swing are created, and each position data memory and direction data memory Write in.

For example, assuming the case where the vertical, forward, backward, and left and right swings of the yarn swing are realized by a cam mechanism, each cam curve of the vertical movement cam, the forward and backward movement cam, and the left and right movement cam (with respect to the time of the cam follower) A position change curve) is created, and position data and direction data of the cam curve with respect to time are extracted. Then, the vertical, front-rear, and left-right position data are written in the position data memory by specifying addresses in time order, and those direction data are written in the direction data memory.

Furthermore, assuming that the feed mechanism is realized by a cam mechanism, a cam curve of the feed cam is created, the position data for the time of the cam curve is taken out, and the position data is addressed in the position data memory in chronological order. Specify and write.

When knitting a mesh with a normal mesh, it is sufficient to create position data and direction data during the one- or two-knot process and write it in memory. When a net is knitted, data for several continuous steps may be created and written in the memory.

Creation of such position data and direction data
It can be created relatively easily by a general-purpose personal computer, and can be easily written in the ROM serving as a memory.

When the knitting machine starts the knitting operation, the control means reads each data in order by designating an address from each position data memory and direction data memory at a predetermined timing synchronized with the rotation of the main shaft of the knitting machine, As the pulse train signal, signals and outputs to the respective motor drive circuits of the up / down servo motor, the front / rear servo motor, and the left / right servo motor. Each motor drive circuit drives each servo motor by the number of rotations according to the number of input pulses, which allows the thread swing to move up and down, front and back, left and right at predetermined timings, such as rotation of the upper hook and movement of the lower hook. The knot is made and the knitting is performed.

After the knotting process is completed and the tightening is performed, the control means
Data is read from the position data memory for the eye feed at a predetermined timing, and the signal is output to the motor drive circuit of the eye feed servo motor as a pulse train signal. The motor drive circuit drives the servomotor by the number of rotations corresponding to the input number of pulses, whereby the feed roller is rotated by a predetermined angle to perform feed.

<Example> Hereinafter, an example of the present invention is described based on a drawing.

FIG. 1 shows a schematic side view of the knitting machine, and FIG. 2 shows a perspective view of the yarn swinging mechanism.

First, the yarn swinging mechanism will be described with reference to FIG. 2. Reference numeral 1 is a yarn swinging frame movably supported vertically, forward and backward, and left and right. On the yarn swinging frame 1, a hole for supporting and passing warp yarns is formed. The thread swing 2 having a structure in which a frame member having a V-shaped cross section is provided at regular intervals is fixed along the longitudinal direction.

Reference numeral 3 is a front-rear drive shaft supported by the main body frame along the thread swing 2, a lever 4 is fixed to a part of the shaft, and the lever 4 is connected to the upper portion of the thread swing frame 1 via an adjusting rod 5 to drive the front-back drive. In accordance with the rotation of the shaft 3, the thread swing 2 moves back and forth in the knitting machine. Reference numeral 6 denotes a front-rear servomotor that rotationally drives the front-rear drive shaft 3, and its rotating shaft is linked to the front-rear drive shaft 3 via a speed reducer 7 and a gear 8. Front-back servo motor 6
As a result, the front-rear drive shaft rotates, and the thread swing frame 2 moves in the front-rear direction via the lever 4 and the adjusting rod 5.

A vertical drive shaft 10 is provided near the lower portion of the thread swing frame 1 and is supported by the main body frame along the thread swing 2.
The lever 11 is fixed to a part thereof, and the tip of the lever 11 is connected to the lower end portion of the thread swing frame 1 via the connecting member 12. Reference numeral 13 denotes a vertical servomotor that rotationally drives the vertical drive shaft 10. The rotary shaft is linked to the vertical drive shaft 10 via a speed reducer 7 and a gear 8. The vertical drive shaft 10 is rotated by the vertical servomotor 13, and the thread swing frame 1 moves vertically via the lever 11 and the connecting member 12.

Reference numeral 14 denotes a left / right drive mechanism fixed on the main body frame near the lower portion of the thread swing frame 1, and a screw shaft 16 is pivotally supported on a base frame 15. The screw shaft 16 has left and right sides supported by guide shafts. The drive member 17 is screwed together, and the left and right drive members 17 are moved along the yarn swinging 2, that is, in the left and right direction of the braiding machine by the rotation of the screw shaft 16. The left and right drive members 17 are adjustment rods 1.
It is connected to the lower part of the thread swing frame 1 via 8. 19
Is a left / right servomotor for driving the left / right driving member 17, and its rotation shaft is connected to the screw shaft 16 via a coupling. The left and right servomotors 19 allow the screw shaft 16
Rotates, whereby the left-right drive member 17 moves left and right, and the thread swing frame 2 connected thereto moves left and right.

Next, the upper hook driving mechanism will be described with reference to FIGS. 3 and 4. Reference numeral 21 denotes a support frame having a U-shaped cross section, and a large number of upper hooks 22 are vertically supported on the support frame 21 so as to be rotatable at predetermined intervals. The front and rear swing shafts 23 are fixed to both ends of the support frame 1 in order to swing the upper hooks 22 back and forth at a predetermined timing on the support frame 21. It is horizontally supported on the frame.

A pinion 24 is attached to the shaft portion 22a of each upper hook 22. On the other hand, a rack 25 that meshes with the pinion 24 is slidably arranged in the support frame 21 along the longitudinal direction of the frame, that is, horizontally slidable, and the rack 25 moves in the horizontal direction, so that a large number of hooks are hooked. 22 rotates about its axis.

A groove is formed in the axial direction of one of the front and rear swing shafts 23 that supports the support frame 21, and the drive bar 26 connected to the rack 25 is inserted into the groove. A moving member 28 of a horizontal moving mechanism 27, which will be described later, is connected to an end portion of the drive bar 26 via a connecting member 32. The connecting member 32 has a structure that transmits the moving force of the moving member 28 to the drive bar 26 while allowing the front-back swing shaft 23 to rotate.

In the horizontal moving mechanism 27, a screw shaft 30 is rotatably supported in a base frame 29 having a U-shaped cross section, and the screw shaft 30 is provided at the center of a moving member 28 slidably supported by guide shafts 31 on both sides. The moving member 28 is configured to be screwed and is rotated, so that the moving member 28 moves in the horizontal direction, that is, along the front-back swing shaft 23.

An upper hook rotation servomotor 33 is connected to the end of the upper shaft to rotate the screw shaft 30. Therefore, the drive bar 26 of the horizontal movement mechanism 27 is horizontally moved by the rotational drive of the rotation servomotor 33, and the drive bar 26 and the rack 2 are moved.
5, each upper hook 22 is rotated in the forward or reverse direction via the pinion 24.

On the other hand, a gear 34 is fixed to the front-rear swing shaft 23 on the opposite side, and the upper hook front-rear servo motor 36 is rotated through the gears 34 and 35 so as to rotate the swing shaft 23 in both directions at a low speed.
Is arranged, and its rotating shaft is connected to the shaft of the gear 35 via a speed reducer. Therefore, by driving the upper hook front-back servo motor 36, the entire upper hook 22 swings back and forth together with the support frame 1.

Next, referring to FIG. 5, an explanation will be given of the feed mechanism 41, which is a feed roll which feeds the knotted net in accordance with the mesh size, and is horizontally arranged below the knotted portion, with both sides supported by the body frame. Set up. A guide roll 42 contacts the side of the indexing roll 41 and is axially supported so as to be driven, and the mesh passes between the guide roll 42 and the guide roll 42. The index feed roll 41 includes a index feed servo motor 4 via a bevel gear 43 and a speed reducer 44.
5, which is connected to 5, by the rotation of the feed servo motor 45,
At the end of the nodule, rotate the net by a predetermined angle.

Next, the above-mentioned servo motors 6, 13, 19, 33, 3
The control system of Nos. 6 and 45 will be described with reference to the block diagram of FIG. ROMs 50 to 55 each serve as a position data memory
The ROM 50 stores vertical position data, the ROM 51 stores front-back position data, and the ROM 52 stores left-right position data. Each position data corresponds to the position of each cam curve when the thread swing 2 is moved virtually up and down, front and back, and left and right by a two knot process using a cam.
Each position data is created as described later, and each ROM 50 to 5 is created.
2 to 8 bits of data are sequentially written to the addresses of 0000 to FFFF.

Reference numeral 56 is a ROM which serves as a direction data memory for storing the data of the moving direction of the thread swing (the rotating direction of the motor).
The direction data is stored for each bit at addresses corresponding to the vertical, front-rear, and left-right position data stored in the OMs 50 to 52.

59 is a 16-bit binary counter, which is 0000 above.
The numbers (0 to 65535) corresponding to the addresses from ~ FFFF are incremented, and the signals are connected to the ROMs 50 to 56, respectively.

Reference numeral 58 denotes a clock generator that generates a clock signal f1 having a predetermined frequency and a clock signal f2 having a frequency eight times that of the clock signal. The clock signal f1 is sent to the counter 59 to shift the clock signal f2 to shift registers 60 to 65 described later. Connected to send.

A shift register 60 is provided on the output side of each of the ROMs 50 to 52.
~ 62 are connected. The shift registers 60 to 62 operate so that the 8-bit data read from the ROMs 50 to 52 are output one bit at a time in response to the input of the clock signal f2.

The output side of each shift register 60-62 is provided with a motor drive circuit 70-for the above-mentioned servomotors 13, 6, 19, respectively.
72 is connected.

Further, reference numerals 53 and 54 are ROMs serving as position data memory for the upper hook, and the rotational position data is stored in the ROM 53 in the ROM 53.
In 4, the upper hook front and rear position data is stored. Similar to the above, each position data corresponds to the position of each cam curve when the upper hook 22 is virtually rotated and moved back and forth for one knot step by using a cam, and each position data will be described later. Data is created and sequentially written in the ROMs 53 to 54 as 8-bit data at addresses 0000 to FFFF.

The data of the rotation direction of the upper hook 22 or the back-and-forth swing direction (the rotation direction of the servo motor) corresponds to the rotation of the upper hook and the front and rear position data stored in the ROMs 53 and 54 in the ROM 56 serving as the above-mentioned direction data memory. Each bit is stored in the specified address.

The shift registers 6 are provided on the output sides of the ROMs 53 and 54, respectively.
3, 64 are connected. This shift register 63, 64
Operates to output the 8-bit data read from each of the ROMs 53 and 54 one by one in response to the input of the clock signal f2.

Motor drive circuits 73 and 74 of the upper hook rotating servo motor 33 and the upper hook rotating servo motor 36 are connected to the output sides of the shift registers 63 and 64, respectively.

Further, 55 is an RO which serves as a position data memory for feeding the eye.
At M, the ROM 55 stores the position data corresponding to the rotation angle of the feed roller 41. Similar to the above, the position data corresponds to the position of the cam curve when the eye feeding roll 41 is virtually rotated using the cam to perform the eye feeding operation. Is created, and the ROM 55 has 0000 to FF as 8-bit data.
It is written in the address of FF in order.

The above servo motors 13, 6, 19, 33, 36, 45
A DC servo motor, an AC servo motor, a step motor, or the like is used for this, and has a rotational position detector. Further, the motor drive circuits 70 to 75 supply power to the motor according to the signal from the amplification unit that calculates the position deviation between the rotation position sent from the rotation position detector and the target value due to the input pulse. The power conversion unit for driving each servo motor is accurately driven according to the number (frequency) of the input pulse signals.

The output side of the ROM 56 that stores and reads the data of the rotation direction is connected to the above-mentioned motor drive circuits 70 to 75, and gives a command signal of the rotation direction to each of the motor drive circuits 70 to 75. The counter 59, the clock generator 58, and the shift registers 60 to 65 constitute a control means. Moreover, although ROM was used as the data memory, of course RA
It is also possible to use M, and in this case, the data created in advance may be stored in a magnetic disk or the like and moved to RAM when used. Further, if the dual port RAM is used, it is possible to change the data during operation.

The lower hook of the knitting machine, the warp yarn feeding mechanism, etc. are driven by the cam mechanism driven by the main shaft, which is driven by the servo motor and also controls the servo motor in synchronization with the same clock signal as above. The entire knitting machine is synchronized.

Next, a method of creating the position data and the direction data of the above-mentioned thread swing, upper hook, and eye feeding will be described with reference to FIGS. 7 and 8.

First, assuming that each movement of the thread swing 2, the upper hook 22, and the feed roller 41 is realized by a cam structure, a vertical movement cam, a forward / backward movement cam, and a left / right movement cam for thread swing during a single knot or several knot process. The peak value of each cam (cam follower) in the moving cam, the rotary moving cam for the upper hook, the back-and-forth moving cam, and the feed cam is set on the coordinate of the position with respect to time (a in FIG. 7). This peak value data is input to a personal computer or the like, and linear velocity data whose velocity is the inclination of the line connecting the peak values is created by calculation (b in FIG. 7).

Since this linear speed data has a large speed change when the direction changes, it is converted to curve speed data that has a small speed change when the direction changes. That is, curve velocity data of a sine curve having the area of each periodic portion equal to the area of each shaded periodic portion as shown in b of FIG. 7 is created by calculation (c of FIG. 7). . Then, by integrating this curve velocity data at time t, curve position data is obtained as shown in FIG. 7d.

The curve position data is a change curve of the position of the virtual cam follower with respect to time, and the position data and the direction data of the curve with respect to time are extracted as shown in FIG.

That is, as shown in FIG. 8, the clock signal f1,
The above curve position data (curve A) is arranged on the time axis where f2 is arranged, and the time axis is divided for each cycle of the clock signal f1 (8 clocks for the clock signal f2), and the vertical axis indicating the position is further divided. Is divided into, for example, 5 and horizontal lines 1 to 5 are drawn.

Then, the intersections of the curve A and the horizontal lines 1 to 5 are obtained, and one output pulse signal is generated in synchronization with the rising edge of the clock signal f2 closest to the intersections.
Create position data of 8 bits. Therefore, for example, in the case of FIG. 8, the position data of the address 0008 is 00001000 and the position data of the address 0009 is 10001000.

On the other hand, the direction data of the thread swing and the upper hook are compared with the previous position data when the position output pulse signal is generated, and if the position is increased, the sign 0 indicating the forward direction is set, and the position is decreased. If it is done, it is made in one bit so as to have a code 1 indicating the opposite direction. The direction data for index feed is always 0.

In this way, the position data and the direction data for the vertical, forward, backward, left and right of the thread swing 22 during the single knot or several knot process, the upper hook 2
Two rotations, front and rear positions and direction data, and position data corresponding to the rotation angle of the feed roller 41 are created. Then, the position data of the thread swing is written in the up / down ROM 50, the front / rear ROM 51, and the left / right ROM 52 by designating addresses of 0000 to FFFF, and the upper hook position data is similarly rotated in the ROM 53. Are written in the front and rear ROM 54, and their direction data are written in the corresponding addresses of the ROM 56. Similarly, the position data for the index feed is written in the ROM 55 for the index feed.

When knitting a special net in which the mesh size gradually changes, the position data for the index feed changes according to the mesh size. Therefore, all the position data is the data at the time of maximum feed, and when reading and outputting the data, F-F
The converter gradually changes the pulse frequency and outputs it to the drive circuit. By doing so, it is not necessary to increase the capacity of the position data memory. Further, when knitting a hexagonal mesh having a hexagonal eye, two stitch feeds with different stitch feed amounts in each process are repeated, so the stitch feed data of the two processes is written in the ROM 55. After the knotting process, the left and right position data of the thread swing is created and stored in the ROM 62 so that the movement of the comb between the recesses performed by the thread swing is performed every other step in the case of the turtle shell net. do it.

Since the creation and writing of each value data and direction data for thread swing, hooking, and stitch feed as described above can be performed on a general-purpose personal computer, it is possible to easily and quickly deal with the change of the knitting method. it can.

Next, the operation of the driving device for the knitting machine having the above structure will be described.

When entering the knotting process, for example, the thread swing 2 holding the warp thread 20 first rises to the uppermost portion. In this case, counter 5
Address signals of 9 to 8 bits are output to the ROMs 50 to 56, and the vertical position data is output from the ROM 50 to the ROMs.
Direction data is read from 56. The position data is sent to the shift register 60 and output as a pulse train signal synchronized with the clock signal f2 to the motor drive circuit 70. The direction data is output from the ROM 56 to the motor drive circuit 70.

The motor drive circuit 70 supplies a drive current to the up / down servo motor 13 according to the input pulse, and the up / down servo motor 13 rotates in the designated direction by the number corresponding to the number of pulses. As a result, the vertical drive shaft 10 in FIG. 2 rotates, and the yarn swing frame, that is, the yarn swing 2, is lifted up to a predetermined position via the lever 11 and the connecting member 12.

As described above, during the operation of the knitting machine, the yarn swinger 2 controls and drives the servo motor by using the data directly read from the ROM without performing any calculation or the like. Controlled.

Next, while the upper hook 22 rotates, the thread swing 2 descends, and the warp thread 20 is wound around the upper hook. In this case, the thread swing 2
In the control of 1, the reverse rotation direction data is read from the ROM 56, the up / down servo motor 13 rotates in the reverse direction to the above, and the thread swing 2 moves downward to a predetermined position.

When the upper hook 22 rotates in a specific direction and the warp thread 20 is wound around the upper hook 2, an 8-bit address signal is output from the counter 59 to the ROMs 53 and 54, and rotation position data from the ROM 53 and direction data from the ROM 54. Read out. The position data is sent to the shift register 63,
The pulse train signal synchronized with the clock signal f2 is output to the motor drive circuit 73. Similar to the above, it is output from the ROM 56 to the motor drive circuit 73.

The motor drive circuit 73 supplies a drive current to the rotation servomotor 33 according to the input pulse, and the rotation servomotor 33 rotates in the designated direction by the number corresponding to the number of pulses. As a result, the screw shaft 30 of the horizontal moving mechanism 27 of FIG. 3 rotates, the moving member 28 moves, and the connecting member 32
The rack 25 slides in the horizontal direction via the drive bar 26, and the plurality of upper hooks 22 are rotationally driven in the specific direction by a predetermined rotation angle via the pinion 24.

Next, the lower hook penetrates the lower part of the upper hook 22, and the thread swing 2 moves vertically like a triangle, that is, ascending and moving to the right, and descending to the left, so that the warp thread 20
Is wrapped around the lower hook and finally moved backward. The lower hook is generally operated by the rotation of a cam fixed to the main shaft of the knitting machine. The main shaft is rotationally driven by a servo motor, and the servo motor is driven by a counter 59 and a clock generator 58. If the constant speed or variable speed rotation is performed in synchronism with the signal, the movement of the thread swing 2, the upper hook 22 and the lower hook can be completely synchronized for operation.

When the thread swing 2 moves up and down, front and back, and left and right at substantially the same time, in the up and down direction, the data is read from the ROM 50 as described above and the up and down servo motor 13 is rotationally driven to move the thread swing 2 up and down. Move to. In the left-right direction, the ROM 52 outputs the left-right position data and RO.
The direction data is read from M56, the position data signal is sent to the shift register 62, the pulse train signal is output from the shift register 262 to the motor drive circuit 72, and the direction data is also sent to the motor drive circuit 72. Then, the motor drive circuit 72 supplies a drive current to the left and right servo motors 19 according to the input pulses, and the left and right servo motors 19 rotate in the designated direction by the number corresponding to the number of pulses. As a result, the screw shaft 16 in FIG. 2 rotates, the left and right driving members 17 are moved, and the thread swing frame, that is, the thread swing 2 is moved to the right or left via the adjusting rod 18.

Regarding the front-back direction, front-back position data is read from the ROM 51 and direction data is read from the ROM 56. The position data is sent to the shift register 61 and the clock signal f
The motor drive circuit 71 is output as a pulse train signal synchronized with 2. The direction data is output from the ROM 56 to the motor drive circuit 71.

The motor drive circuit 71 supplies a drive current to the front-rear servo motor 6 according to the input pulse, and the front-rear servo motor 6 rotates in the designated direction by the number corresponding to the number of pulses. As a result, the front-rear drive shaft 3 shown in FIG. 2 is rotated, and the yarn swing frame, that is, the yarn swing 2 is moved to a predetermined front or rear position via the lever 4 and the adjusting rod 5.

Then, with the warp thread 20 hung on the lower hook, the lower hook moves forward to warp the lower thread 2 from the lower portion of the upper hook 22.
0 is pulled out, and the thread goes under the boat shape, that is, the weft thread. Then, the upper hook 22 swings forward and the knot is removed from the upper hook.

When the upper hook 22 swings forward and breaks the loop, the front and rear position data is read from the ROM 54 and the direction data is read from the ROM 56 by the output of the address signal from the counter 59. The position data is sent to the shift register 64 and is output to the motor drive circuit 74 as a pulse train signal synchronized with the clock signal f2. The direction data is output from the ROM 56 to the motor drive circuit 74.

The motor drive circuit 74 supplies a drive current to the front-rear servo motor 36 according to the input pulse, and the front-rear servo motor 36 rotates in the designated direction by the number corresponding to the number of pulses. As a result, the front-back swing shaft 23 rotates via the gears 34 and 35, and the support frame 21 that supports the upper hook 22.
Swings forward, the upper hook 22 swings forward, and the upper hook 22
The loop of warp yarn 20 is removed.

Then, a not-shown tightening mechanism is operated to perform the tightening, and then, the feed roller 41 is rotated to feed the net, thereby making a mesh leg having a length corresponding to the mesh.

When performing the eye feeding, the position data for the eye feeding is read from the ROM 55 by the output of the address signal from the counter 59. The position data is sent to the shift register 65 and output to the motor drive circuit 75 as a pulse train signal synchronized with the clock signal f2.

The motor drive circuit 75 supplies a drive current to the eye-feeding servo motor 45 according to the input pulse, and the eye-feeding servo motor 45 rotates in the designated direction by the number corresponding to the number of pulses. As a result, the index feed roll 41 is rotated by a predetermined angle via the reduction gear 44 and the bevel gear 43, and index feed is performed.

After that, the thread swinger 2 operates so as to transfer the warp thread 20 to the concave portion adjacent to the comb, and in this case also, similarly to the above,
The yarn swinging 2 moves up and down, front and back, and left and right by a predetermined distance by the three servomotors 13, 6, and 19 to change the position of the comb of the warp yarn 20.

<Effects of the Invention> As described above, according to the drive device of the knitting machine of the present invention, the data calculated in advance and written in the memory is read as it is during operation and used for drive control of the servo motor. However, since the yarn swinger, the upper hook, and the eye-feeding roll are moved, it is possible to drive and control those operating members extremely quickly and accurately without requiring time for calculation processing during operation. In addition, when changing the braiding method, position data and direction data according to the movement of the thread swing, upper hook, etc. can be easily created on a personal computer, etc. You can respond quickly. In addition, the number of large-sized cams driven by the spindle is smaller than that of the conventional braiding machine, the load on the spindle is significantly reduced, and high-speed operation is possible with small power. In addition, thread swing and feed
By sequentially reading the data stored in advance in the data memory and driving it by the controlled servo motor, it is possible to knit a net having a gradually changing mesh or a special net such as a turtle shell net.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is a schematic side view of a knitting machine, FIG. 2 is a perspective view of a yarn swinging drive mechanism, FIG. 3 is a perspective view of an upper hook drive mechanism, and FIG. Is an enlarged cross-sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a perspective view of the feed mechanism, FIG. 6 is a block diagram of the control system of the drive device, and FIG. 7 is an explanation when creating curve position data. FIGS. 8A and 8B are explanatory views when the position data and the direction data are created from the curve position data. 2 ... Thread swinger, 3 ... Front-rear drive shaft, 6 ... Front-rear servo motor, 10 ... Vertical drive shaft, 13 ... Vertical servo motor, 17 ... Left-right drive member, 19 ... Left-right servo motor , 20 ... warp thread, 21 ... support frame, 22 ... upper hook, 23 ... longitudinal swing axis, 24 ... pinion, 25 ... rack, 27 ... horizontal movement mechanism, 33 ... rotation servo motor, 36 ... Servo motor for front and rear hooks, 41 ... Feed roll, 45 ... Servo motor for feed, 50-56 ... ROM (data memory), 70-75 ... Motor drive circuit.

Claims (2)

[Claims] 1. A vertical servomotor for rotationally driving a vertical drive shaft linked to a thread swing frame via a lever so as to move the thread swing up and down, and for moving the thread swing back and forth. As described above, a front-rear servomotor that rotationally drives a front-rear drive shaft that is connected to the thread swing frame via a lever and a left and right servomotor that is connected to the thread swing frame to move the thread swing left and right. Left and right servo motors that rotate and drive screw shafts that are screwed into the drive members, index feed servo motors that rotate and feed index feed rolls that feed the knotted net, and pulse signals that are connected to the servo motors and input A motor drive circuit that controls the rotation of each servo motor according to the above, position data corresponding to the vertical movement, forward / backward movement, and left / right movement of the yarn swing at the time of knitting, and the rotation angle of the feed roller. Each position data memory in which corresponding position data is stored in advance, each direction data memory in which vertical movement, back-and-forth movement, and left-right movement direction data of the thread swing are stored in advance, each position data memory and each direction A drive unit for a knitting machine, comprising: a control unit that reads out data by designating an address from a data memory at a constant timing and sends the data to a motor drive circuit of each servo motor. 2. A plurality of upper hooks, which are rotatably supported by a support frame and have a pinion attached to a shaft portion, are rotationally driven.
An upper hook rotation servomotor that drives a horizontal movement mechanism that is linked via a rack, and a front and rear swing shaft that is connected to the support frame so as to swing the support frame that supports the upper hook back and forth. The upper hook front and rear servo motors, the motor drive circuit which is connected to each of the servo motors and controls the rotation drive according to the input pulse signal, and the position data corresponding to the back and forth movement and the rotation movement of the upper hook during knitting The control means further includes: each position data memory stored in advance; and a direction data memory in which direction data of forward and backward movements and rotational movements of the upper hook are stored in advance, and the control means stores the position data and direction data for the upper hook in the position. 2. The knitting machine driving device according to claim 1, wherein the driving device reads the data from the data memory and the direction data memory and sends the data to the motor driving circuit to control the movement of the upper hook.