JPH0813288A - Multistage yarn let-off device - Google Patents

Abstract

PURPOSE:To provide the subject space-saving and simple device efficiently compatible with multicolor products, so designed that yarn delivery pulleys and yarn winding means are plurally arranged side by side so as to be drivable with a single motor. CONSTITUTION:A yarn fed from a yarn feed body is threaded through a yarn guide 19a, the yarn end 3a is held at a plate spring 36 at the tip of the mobile shaft 32 of a yarn winding means 100 followed by starting-up of a motor 23 to revolve a belt 15 on a driving pulley 13 and a driven pulley 14 and integrally rotating a yarn winding member 16 to wind the yarn on the V-shaped groove 7a of a yarn delivery pulley 7, and a rack 18 and a ring gear 30 are mutually engaged through the advance of the revolution of the belt 15 to revolve a mobile cam member 31 and the mobile shaft 32 is slidingly displaced from its initial position against the energization of a coil spring 33, and the yarn is shifted in the arrow B direction, transferred onto a guide 19b and spirally wound along the V-shaped grooves 7a, 7b of the pulley 7 to effect setting. The above yarn delivery pulley 7 and yarn winding means 100 are alternately arranged side by side so as to be drivable with a single driving motor, thus the driving motor is started up on gripping a yarn with a loom gripper and the yarn is delivered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multistage yarn feeding device for feeding a plurality of yarns for a loom or a knitting machine.

[0002]

2. Description of the Related Art Conventionally, there are a water jet type and an air jet type in a fluid jet type loom, in which the upper thread and the lower thread of a warp yarn are alternately replaced by a heald frame, and the upper thread and the lower thread are While forming the opening by folding back the opening, the weft is sent out to the opening by a fluid consisting of an air flow or a water flow of the yarn sending device, and the weft is driven by a reed to weave the cloth. The weft yarn delivered by the fluid is arranged between the weft yarn feeder and the main nozzle, and is wound around a pulley having a groove on its peripheral surface and then introduced into the main nozzle. It has been cut with a cutter.

[0003]

When weaving a cloth individually by using a plurality of wefts or by weaving a cloth by using multicolored wefts, a plurality of yarns are sent out by using such a yarn feeding device. Since the devices are simply installed side by side and each device is individually driven and used, there is a problem that the installation space is taken up.

[0004]

Therefore, in the multistage yarn feeding device according to the first aspect, the yarn feeding pulley which is rotationally driven by the driving means, and the yarn which is fed from the yarn feeder is wound around the yarn feeding pulley. A plurality of yarn winding devices are provided, the yarn feeding pulley and the yarn winding device are arranged in parallel, and each yarn feeding pulley is driven by a single driving device. 3. The multi-stage yarn feeding device according to claim 2, wherein the yarn winding means is arranged outside the yarn feeding pulley, and is rotated by a drive pulley, and a fixed cam member supported by the belt so as to be integrally rotatable. , Rotatably supported by the fixed cam member,
A movable cam member having a gear formed on its peripheral surface is slidably supported by the fixed cam member and the movable cam member, one end of which is threaded through a thread guide member and the other end of which is the movable cam member. A movable shaft that contacts the member, a cam portion that is formed between the fixed cam member and the movable cam member, and that slides the movable shaft when the movable cam member rotates, and the movable shaft and the fixed cam member. A thread winding member having a spring member which is interposed between the movable shaft and the movable shaft to give the habit of returning to the initial position, and a rack which meshes with the gear at a predetermined position.

[0005]

According to the present invention, a plurality of yarn feeding pulleys around which the yarn supplied from the yarn feeder is wound, and a plurality of yarn winding means for winding the yarns around the yarn feeding pulleys are provided in parallel. Since each yarn feed pulley is rotationally driven by a single drive means, the size of the device can be suppressed as compared with the conventional yarn delivery device in which each yarn feed pulley is driven by an individual motor.
According to the invention described in claim 2, when the belt is rotationally driven by the drive pulley, the yarn winding member rotates in the same direction, and the yarn locked at one end of the movable shaft through the yarn guiding member is inside the belt. Is wound around the yarn feed pulley located at. When the thread winding member rotates and the gear of the movable cam member meshes with the rack, the movable cam member rotates with respect to the fixed cam member, and the movable shaft is slid by the action of the cam portion provided therebetween. It When the movable shaft slides to a certain range, it is slid back toward the initial position by the spring force of the spring member.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, reference numeral 1 indicates a multi-stage yarn feeding device mounted on the loom 2. The multi-stage yarn feeding device 1
It is arranged between the main nozzle 6 and the tensioner 5 which applies tension to the weft yarn 3 which is accommodated and fed in the bobbin 4 which is a yarn feeder constituting the loom 2. On the right side of the main nozzle 6, the weaving machine 2 is provided with a weaving section 10 which is formed by alternately replacing the upper thread and the lower thread of the warp 8 with a heald frame (not shown) and weaving the opening 9 back. 10
The weft yarn 3 sent from the main nozzle 6 is struck in the opening 9 by the reed 11 arranged in the above to woven the cloth. In addition, the tensioner 5, the main nozzle 6 and the bobbin 4 are provided on the base 4 of the loom 2.
8 are arranged side by side.

As shown in FIG. 1, the multistage yarn feeding device 1 includes a yarn feeding pulley 7 and 7'rotatably driven by a driving motor 12 as a driving means, and a bobbin 4 from the bobbin 4 to the yarn feeding pulleys 7 and 7 '. And a yarn winding means 100, 100 'for winding the wefts 3, 3'of the yarn feeding pulley 7,
7'and the yarn winding means 100, 100 'are alternately arranged side by side.

The yarn feed pulleys 7 and 7'are the base 48 of the loom.
It is fixed to the drive shaft 12a of one drive motor 12 supported by the motor support 47 which is fixed to the right side of the drawing. It is adapted to be sent out to the side of the main nozzle 6 arranged in one direction. As shown in FIG. 1, on the peripheral surfaces of the yarn feeding pulleys 7 and 7 ', two annular V grooves 7a,
7a ', 7b, 7b' are formed in the axial direction.

The yarn winding means 100, 100 'are provided so as to be displaced in the axial direction of the drive shaft 12a with respect to the yarn feeding pulleys 7, 7', and each of the plurality of connecting shafts 46 supported and fixed to the substrate 48 is provided. Edges 17a, 17 of the base plates 17, 17 '
It is supported and connected by penetrating a '. Since the yarn winding means 100 and 100 ′ and the yarn feeding pulleys 7 and 7 ′ have the same configuration, the description will be made below using the yarn feeding pulley 7 and the yarn winding means 100 located on the left side in FIG. to continue. As shown in FIGS. 2 and 3, the yarn winding device 100 includes an endless belt 15 wound around a drive pulley 13 and a driven pulley 14, a yarn winding member 16 supported integrally rotatably on the belt 15, Base plate 1
7, a yarn guide 19 and a yarn guide 1 as a yarn guide member that regulates the positions of the weft yarns 3.
9 and a gripper 20 that intermittently holds and releases the weft yarn 3 wound around the yarn feeding pulley 7.

The drive pulley 13 has a diameter larger than that of the yarn feeding pulley 7 and is rotatably supported by a shaft 21 provided at a lower portion of a base plate 17, and a gear 22 is formed on an outer peripheral surface thereof. The gear 22 includes a drive gear 24 provided on a drive shaft 23 a of a drive motor 23 fixed to the base plate 17.
Mesh with each other and drive the drive pulley 13 to rotate clockwise in FIG. The gear 22 has a diameter larger than that of the drive gear 24, and reduces the rotation of the drive gear 24. The driven pulley 14 is rotatably supported by a shaft 25 supported by a base plate 17 located above the yarn guide 19. Therefore, the belt 15 hung between the driven pulley 14 and the drive pulley 13 is arranged outside the yarn guide 19 and the yarn feeding pulley 7. As shown in FIG. 2, an L-shaped support plate 27 is fixed to a part of the surface of the belt 15 via a U-shaped support base 26 with screws 28. A fixed cam member 29 forming the thread winding member 16 is fastened and fixed to the support plate 27.

The thread winding member 16 is a fixed cam member 2.
9, a movable cam member 31 rotatably supported by the fixed cam member 29, a movable shaft 32 slidably supported by the fixed cam member 29 and the movable cam member 31, and a movable shaft 32 and the fixed cam member 29. A coil spring 33 as a spring member and a cam portion 34 formed between the fixed cam member 29 and the movable cam member 31 are mainly arranged. The fixed cam member 29 is a tubular member, and a sleeve 29a formed on one side thereof projects from the support plate 27 toward the yarn feeding pulley 7 side. A guide pin 35 is fixed to the sleeve 29a toward the inside thereof. A cam 29b is provided on the other side of the fixed cam member located opposite to the sleeve 29a. The cam 29b is a fixed cam 29.
The peripheral surface of the member is shaved so as to have three step portions indicated by reference numerals and in FIG. Movable cam member 31
Is rotatably supported by being covered on the peripheral surface of the uncut unillustrated fixed cam member 29 shown in FIG. 2, and a portion facing the cam 29b is formed on a cam 31b corresponding to the cam.
The peripheral end portion 3 of the movable cam member located on the opposite side of the cam 31b
The rack 1 has a rack 1a when the thread winding member 16 is rotated.
A ring gear 30 is formed as a gear that meshes with the gear 8. The movable cam member 31 is also rotatable with respect to the movable shaft 32. The movable shaft 32 penetrates the fixed cam member 29 and the movable cam member 31, and forms a flat portion 32b at one end 32a thereof. In this flat portion 32b,
A leaf spring 36 is fixed at one end so that it can be opened and closed, and constitutes a locking portion of the weft yarn tip 3a. A guide groove 37 that engages with the pin 35 is formed at an approximately center of the movable shaft 32 so as to extend in the axial direction, and by engaging with the pin 35, rotation of the movable shaft 32 is stopped. The length of the guide groove 37 is
It is set longer than the sliding range of the movable shaft 32 so as not to interfere with the coaxial movement. A ring-shaped spring hook portion 38 is provided on the shaft located between the guide groove 37 and the one end 32a. The other end 33b of the coil spring 33, whose one end 33a is locked to the outer circumference of the sleeve 29a of the fixed cam member, is locked to this spring hook 38, and the habit of returning to the initial direction shown by the arrow A on the movable shaft 32. Is giving.

The rack 18 is arranged on the base plate 17 located upstream of the yarn guide 19 in the rotational direction of the belt 15 and meshes with the ring gear 30 before the belt 15 makes one rotation. . Yarn guide 19
2 is fixedly disposed on the bracket 39 between the drive pulley 13 and the driven pulley 14 as shown in FIG. 2, and is arranged side by side in the axial direction so as to face the yarn feeding pulley 7. There is. The bracket 39 is a bracket 4 that supports the gripper 20 on a plate 40 fixed to the base plate 17.
It is fixed through 1. The gripper 20 has a bracket 41 between the yarn guide 19 and the yarn feeding pulley 7.
It is fixed and arranged. The gripper 20 includes a disc 20C provided on a movable rod 20B of an electromagnetic solenoid 20A and a disc 20C fixed to a bracket 41.
It opens and closes with respect to D and is normally urged in the closing direction indicated by arrow C by a spring 42 locked to the movable rod 20B and the plate 40. The gripper 20 is an electromagnetic solenoid 2
When a drive signal is applied to 0A, the disc 20C is opened to the open position shown in the figure.

As shown in FIG. 3, a pair of guide pins 43 are arranged between the gripper 20 and the yarn feeding pulley 7. The guide pin 43 displaces the weft yarn 3 wound around the yarn guide 19 and the yarn feed pulley 7 between the entry position into the opening / closing area of the gripper 20 indicated by the chain double-dashed line and the retracted position indicated by the solid line. The guide pin 43 is shown in FIG.
As shown in FIG. 5, the grippers 20 are fixed to the free ends 44a of a pair of levers 44 that are rotatably provided below the gripper 20, respectively. A movable piece 45 of a solenoid 45 is connected to the base end 44b of each lever, and when the yarn winding means 100 is operating, it occupies the retracted position shown by the solid line, and when the loom 2 is in operation, two points are provided. It is rotated by the solenoid 45 to the entry position shown by the chain line.

Now, the profiles of the cam 29b and the cam 31b will be described. The cam portion 34 is for sliding the movable shaft 32 in stages, and as shown in FIG. 7, a step portion formed continuously with the cam 29b, and a step portion formed on the cam 31b. ,,, and are matched with each other, and they are usually placed in a matched state. In each step, the belt 15 makes one rotation and the rack 18 and the phosphorus. When meshed with the gear 30, it can move only one step, and when the belt 15 rotates twice, the movable shaft 3
2 is slidably guided toward the initial position. Specifically, when the step portion 'is engaged with the step portion, the movable shaft 32 is displaced in the arrow B direction, and when the step portion' is engaged with the step portion, the movable shaft 32 is moved in the arrow A direction. It has become a profile to be displaced. The gear ratio between the rack 15 and the ring gear 30 is set to 1: 2.

The operation of the multi-stage yarn feeding device 1 thus constructed will be described. First, the weft yarn 3 passed from the bobbin 4 through the tensioner 5 is passed through the yarn guide 19a on the left side in FIG.
The movable shaft 32 is locked to the leaf spring 36 at the tip 32a. At this time, if there is another color or another weft, the thread winding means 1
The weft is locked to a movable shaft (not shown) at 00 '.

Next, a start switch (not shown) is turned on to start the drive motor 23, drive the gear 22, and drive the belt 15 wound around the drive pulley 13 and the driven pulley 14.
Is rotated clockwise in FIG. Then, the yarn winding member 16 rotates integrally with the belt 15 and moves on the outer peripheral side of the yarn feeding pulley 7, and the weft yarn 3 is wound around the V groove 7a of the yarn feeding pulley. As the belt 15 rotates, the rack 18 and the ring gear 3 located in front of the yarn guide 19 are rotated.
When 0 meshes, the ring gear 30 rotates 1/2. When the ring gear 30 rotates, the movable cam member 31 also integrally rotates, and as shown in FIG. 8, the step portion ′ passes over the step portion, and the movable shaft 32 resists the spring force of the coil spring 33.
And slide from the initial position indicated by the two-dot chain line to the first displacement position indicated by the solid line in FIG. Due to this sliding displacement of the movable shaft 32, the position of the weft yarn 3 is displaced in the direction of arrow B.

When the yarn winding member 16 passes through the rack 18 and the yarn guide 19 and starts the second rotation, the movable shaft 3
2, the weft yarn 3 displaced by the first sliding displacement is passed through the yarn guide 19b at the center in FIG. 2, and is wound around the V groove 7b of the yarn feeding pulley as the rotation of the belt 15 progresses. When the thread winding member 16 rotates together with the belt 15 and the ring gear 30 and the rack 18 are engaged for the second time, the step 'of the movable cam member 31 crosses over the step as shown in FIG. You will be guided to the step. Due to the displacement of the movable cam member 31, the movable shaft 32 slides from the first displacement position shown by the chain double-dashed line in FIG. 6 to the second displacement position shown by the solid line in FIG. 2 is displaced in the direction of arrow B, and is passed through the yarn guide 19c on the right side in FIG. 2, then the step portion 'of the movable cam member 31 is guided along the step portion of the fixed cam member 29, and the movable shaft 32 is moved to the coil spring 33. It slides in the direction of arrow A due to the habit of returning. When the yarn winding member 16 passes through the yarn guide 19 and enters the third rotation, and the yarn winding member 16 is in a range not exceeding the yarn feeding pulley 7 in FIG. 3, the switch (not shown) of the drive motor 23 is turned off. Belt 15
To stop the movement of the yarn winding member 16.

Thus, the movable shaft 32 for locking the weft thread 3
The belt winding member 16 for supporting the movable shaft.
The weft yarn 3 can be automatically and spirally wound around the V grooves 7a and 7b formed in the yarn feeding pulley 7 by being displaced stepwise in synchronization with the rotation of the yarn 5.

When the drive motor 23 is switched off and the multistage yarn feeding device 1 is set to the operating state, the solenoid 45 is driven and the guide pin 43 placed in the retracted position shown by the solid line in FIG. Is displaced to the entry position indicated by the chain double-dashed line, and the weft 3 held by the pin 43 outside the opening / closing area of the gripper 20 is
, The gripper 20 is closed by its solenoid 20A, and the weft thread 3 is placed in the gripper 20.
Sandwiched between. When the gripper 20 clamps the weft thread 3,
The drive motor 12 of the multistage yarn feeding device 1 is driven to rotate the yarn feeding pulley 7 clockwise and the weft yarn 3 wound in a spiral shape is fed rightward in FIG. .

As described above, since the yarn feeding pulleys 7 and 7'and the yarn winding means 100 and 100 'are alternately arranged in parallel and the single driving motor 12 drives the yarn feeding pulleys 7 and 7'to rotate, they are individually driven. The size of the device is larger than that of the conventional yarn feeding device 1 in which individual yarn feeding pulleys are driven by using various driving motors,
In particular, the width in the axial direction can be suppressed, and the equipment installation space can be saved. Further, by disposing a plurality of thread feed pulleys and thread winding means, a plurality of weft threads of other colors can be fed out at the same time, and the thread delivery device 1 capable of coping with other color weaves or patterned weaves has a simple structure. Can be provided. Furthermore, a single drive motor 1
By setting the number to 2, the number of parts can be reduced and the cost can be reduced, and the synchronization of the drive motors can be eliminated, so that the structure can be simplified.

The multi-stage yarn feeding device 1 shown in this embodiment
In the above, two sets of the feed pulley and the thread winding means are used, but it is also possible to increase the number of the feed pulleys and the thread winding means in the axial direction as shown in FIG. In this case, the yarn feeding pulleys 7A, 7B, 7B, 7D and the yarn winding means 100A, 100B, 100C, 100D are alternately adjacent to each other on the through shaft 49 rotatably supported by the bracket 50 having a U-shaped cross section. And the bevel gear 51 is fixed to the coaxial one end 49a of the drive shaft 12 of the drive motor 12.
A bevel gear 52 may be provided in a so as to mesh with each other to rotationally drive each feed pulley. In this way, the feed pulleys 7A, 7B. 7B. 7D and thread winding means 10
By providing 0A, 100B, 100C, 100D on the through shaft 49 and supporting them by the bracket 50, the load on the drive shaft 12a can be reduced and the supporting structure can be stabilized. In addition,
Although the bevel gears 51 and 52 are used here, the present invention is not limited to this, and for example, a drive mechanism in which a chain is wound around another type of gear or sprocket may be adopted. If the drive mechanism in which the chain is wound around the sprocket is adopted, the drive motor 12 and the penetrating shaft 49 do not have to be adjacent to each other, so that the degree of freedom in the layout of the drive mechanism and the multistage yarn feeding device is increased.

[0022]

According to the invention described in claim 1, since a plurality of feed pulleys and a yarn winding means are arranged in parallel, and the yarn feeding pulley is rotationally driven by a single driving means, the axial direction of the device can be improved. The width can be suppressed, the space for equipment installation can be reduced, and the use of a single drive means reduces the number of parts and costs, and also requires the synchronization of the drive motor. The structure can be simplified because there is no Furthermore, by arranging a plurality of thread feed pulleys and thread winding means, a plurality of threads of other colors can be fed out at the same time, and it is possible to cope with other color weaves and patterned weaves. According to the invention described in claim 2, since the weft can be automatically wound around the outside of the yarn feeding pulley, it is not necessary to manually cut the weft and wind the pulley around the pulley during setting. In addition, it is possible to automate the device and improve work efficiency.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a multistage yarn feeding device showing an embodiment of the present invention.

FIG. 2 is a side sectional view of a multistage yarn feeding device.

FIG. 3 is a partially cutaway front view showing the configuration of a multi-stage yarn feeding device.

FIG. 4 is a front view showing a schematic configuration of a loom equipped with a multistage yarn feeding device.

FIG. 5 is an enlarged view showing a first operation of the yarn feeding device.

FIG. 6 is an enlarged view showing a second operation of the yarn feeding device.

FIG. 7 is a development view of the cam portion when the movable shaft is at the initial position.

FIG. 8 is a development view of the cam portion when the movable shaft is at the first displacement position.

FIG. 9 is a development view of the cam portion when the movable shaft is at the second displacement position.

FIG. 10 is an enlarged view showing the configuration and operation of a weft guide pin and its drive mechanism.

FIG. 11 is a side view showing a modified example of the yarn feeding device.

[Explanation of symbols]

1, 1'multi-stage yarn feeding device 3 yarn (weft) 4 yarn feeder (bobbin) 7 (A, B, C, D), 7 'yarn feeding pulley 12 driving means (driving motor) 13 driving pulley 15 belt 16 Thread winding member 17 Rack 19 Thread guide member (yarn guide) 29 Fixed cam member 30 Gear (ring gear) 31 Movable cam member 32 Movable shaft 32a One end 32b Other end 33 Spring member (coil spring) 34 Cam portion 100 (A, B, C, D), 100 'thread winding means

Claims (2)

[Claims] 1. A yarn feeding pulley rotatably driven by a driving means, and a plurality of yarn winding means for winding a yarn supplied from a yarn supplying body on the yarn feeding pulley, the yarn feeding pulley and the yarn winding means. And a plurality of yarn feeding pulleys are arranged side by side, and each yarn feeding pulley is driven by a single driving means. 2. The yarn winding means is arranged outside the yarn feeding pulley, is rotated by a drive pulley, is fixed to the belt, and is fixed to the fixed cam member. A movable cam member, which is rotatably supported and has a gear formed on its peripheral surface, is slidably supported by the fixed cam member and the movable cam member, and a thread is locked at one end through a thread guide member. A movable shaft having the other end in contact with the movable cam member, a cam portion formed between the fixed cam member and the movable cam member, and sliding the movable shaft when the movable cam member rotates; And a fixed cam member, and a thread winding member having a spring member for providing the movable shaft with a habit of returning to the initial position, and a rack that meshes with the gear at a predetermined position. Multi-stage thread feed described in 1. And equipment.