JPH0782632A - Pile-forming apparatus of pile loom - Google Patents

Abstract

PURPOSE:To provide a pile-forming apparatus effective for decreasing the power of a driving motor for terry motion and keeping the quality of pile fabric. CONSTITUTION:Follower nuts 20A, 20B are engaged with a ball screw 18a acting as an output shaft of a servo motor 18. The follower nut 20A is connected to the 1st arm 22a of a moving direction change lever 22 through a link 23. The follower nuts 20A, 20B are moved by the rotation of the ball screw 18a and the displacement is transmitted to an expansion bar 6 via the link 23, the moving direction change lever 22, a rod 24, an intermediate lever 13, a rod 17 and a supporting lever 16 to shift the cloth fell of the woven fabric W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile forming device for a pile loom which forms a pile by changing the relative distance between the reed hitting position of the reed and the cloth fell.

[0002]

2. Description of the Related Art As a method of forming a pile by changing the relative distance between the reed beating position of the reed and the cloth fell, the method of changing the reed position and the cloth fell position by changing the cloth path There is a method to change. Japanese Unexamined Patent Publication No. 2-47337 discloses a pile loom that changes a cloth cloth path to change a cloth fell position. A worm wheel portion is formed on a support lever that supports the expansion bar, and a worm fixed to the output shaft of the servomotor meshes with the worm wheel portion. The expansion bar swings and is displaced by the forward and reverse rotations of the servo motor, and the cloth fell position is changed by this displacement.

[0003]

However, there is a backlash between the worm and the worm wheel, and a large sliding load is generated between the worm and the worm wheel when the servomotor is switched between the forward and reverse directions. This sliding load causes wear between the worm and the worm wheel. If abrasion occurs between the worm and the worm wheel, backlash increases, and the position of the expansion bar during the first pick and the loose pick deviates from the normal position. Therefore, the cloth fell position at the time of the first pick and the loose pick deviates from the normal position. That is, the cloth fell position during the first pick is displaced in the direction in which the beating force increases, and the cloth fell position during the loose pick is displaced in the direction away from the beating position. Due to such displacement, the beating force becomes excessive, or the terry amount increases and changes. Excessive beating force and changes in the amount of terry adversely affect pile formation, and the quality of pile fabrics is degraded.

Further, since the sliding load is large, the driving force transmission efficiency between the worm and the worm wheel is poor, and a large load is applied to the servo motor. Therefore, a large-capacity motor that is disadvantageous in terms of cost must be used as the servomotor.

It is an object of the present invention to provide a pile forming device for a pile loom which enables reduction of the capacity of a drive motor for performing terry motion and avoidance of deterioration of quality of pile fabric.

[0006]

To this end, according to the first aspect of the invention, a ball is provided in which the driven body screwed into the ball screw is switched between a terry amount zero position and a terry amount present position by rotation of the ball screw. A pile including a screw mechanism, a terry motion member that changes the relative distance between the beating position of the reed and the cloth fell of the cloth in association with the displacement of the driven body, and a drive motor that reciprocally rotates the ball screw. The forming device was configured.

According to a second aspect of the present invention, the ball screw is covered with a flex cover which expands and contracts due to the displacement of the driven body.

[0008]

The terry motion member is, for example, an expansion bar or a reed forming a woven cloth path, and the terry motion displacement of the driven body is transmitted to the terry motion member. Since there is a ball between the ball screw and the driven body, there is no sliding load, and the rolling load is small. Therefore, no wear occurs between the ball screw, the ball, and the driven body, and the terry motion member does not shift from the normal position during the first pick and the loose pick.
Further, the drive transmission efficiency between the ball screw and the driven body is large, and the capacity of the drive motor can be reduced.

If the ball screw is covered with a flex cover, it is possible to prevent the fly thread from adhering to the ball screw, and it is possible to avoid a decrease in driving force transmission efficiency due to the adherence of the fly thread.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. FIG. 1 shows the side surface of the entire loom, and 1 is a warp beam for plain weaving. The ground warp T fed from the warp beam 1 for plain weave by the operation of a feed motor (not shown) is passed through the heald 4 and the deformed reed 5 through the back roller 2 and the tension roller 3. The woven cloth W is an expansion bar 6 which serves as a terry motion member,
It is wound around the cross roller 10 via the surface roller 7 and the guide rollers 8 and 9.

A pile warp beam 11 is supported above the ground warp beam 1. The pile warp yarn Tp delivered from the pile warp beam 11 by the operation of the delivery motor (not shown) is passed through the heddle 4 and the deformed reed 5 via the tension roller 12.

At the center of the front and rear of the loom, a three-pronged intermediate lever 13 is arranged so as to be rotatable around a support shaft 13a.
A support lever 14 is arranged at the rear of the loom so as to be rotatable around a support shaft 14a, and a tension roller 12 is supported by the support lever 14. The support lever 14 and the first arm 13b of the intermediate lever 13 are connected by a rod 15. A support lever 16 is provided on the front part of the loom as a spindle 1.
The support lever 1 is arranged so as to be rotatable around 6a.
An expansion bar 6 is supported by 6. The support lever 16 and the second arm 13c of the intermediate lever 13 are connected by a rod 17. When the intermediate lever 13 rotates, the support levers 14 and 16 rotate in the same direction, and the tension roller 12 and the expansion bar 6 are displaced in the same direction by the same amount. By this displacement, the path of the pile warp threads Tp and the path of the woven cloth W are displaced, and the cloth cloth W ₁ of the woven cloth W is displaced.

As shown in FIGS. 1 and 2, the intermediate lever 13
A servo motor 18 is disposed above the. The output shaft of the servo motor 18 is a ball screw 18a,
The ball screw 18a is inserted through the rear wall 19a of the support box 19. The ball screw 18a is the rear wall 1 of the support box 19.
It is rotatably supported by 9a and the front wall 19b.
The ball screw 18a has a pair of driven nuts 20A and 20B.
Are screwed together via balls (not shown). The driven nuts 20A and 20B are biased toward each other by a tightening mechanism (not shown). That is, the driven nut 20
A and 20B are preloaded to the ball screw 18a via the balls, and the forward and reverse rotations of the ball screw 18a cause the driven nuts 20A and 20B to integrally move back and forth along the ball screw 18a without backlash. Move by screwing.

The servomotor 18 is controlled by the control computer C. The control computer C controls the operation of the servo motor 18 based on the pile weave pattern. The driven nuts 20A and 20B are switchably arranged between a zero terry amount position shown by a chain line and a terry amount existing position shown by a solid line in FIG. 2 as the ball screw 18a rotates. At the time of the first pick, the driven nuts 20A and 20B are arranged at the terry amount zero position,
At the time of loose picking, the driven nuts 20A and 20B are arranged at positions where the terry amount is present.

A slider 25 is fixed to the driven nut 20B. A guide 26 is fixed to the bottom wall of the support box 19, and the guide 26 guides the movement of the slider 25 that moves integrally with the driven nuts 20A and 20B. This guiding action prevents rotation of the driven nuts 20A and 20B.

A guide 26 for guiding the slider 25 is provided.
It is preferable to use a roller guide type to prevent seizure. As shown in FIG. 3, both side walls 19c, 1 of the support box 19
A support shaft 21 is rotatably installed and supported between 9d.
As shown in FIG. 2, a bifurcated displacement direction conversion lever 22 is supported on the support shaft 21. The first arm 22a of the displacement direction conversion lever 22 and the driven nut 20A are connected by a link 23.

Second arm 22 of displacement direction changing lever 22
b and the third arm 13d of the intermediate lever 13 are rod 24
Are connected by. Therefore, the reciprocal displacement of the driven nuts 20A and 20B due to the forward and reverse rotation of the ball screw 18a is transmitted through the displacement transmission mechanism including the link 23, the displacement direction conversion lever 22, the rod 24, the intermediate lever 13, the rod 17 and the support lever 16. It is transmitted to the expansion bar 6. Due to this displacement transmission, the expansion bar 6 is rotationally displaced about the support shaft 16a. Driven nut 20A,
When 20B is at the terry amount zero position, the displacement direction conversion lever 22 is at the position shown by the chain line in FIG. 2, and the expansion bar 6 is arranged at the position shown by the chain line in FIG. Driven nut 2
When 0A and 20B are in the positions with terry amount, the displacement direction changing lever 22 is in the position shown by the solid line in FIG. 2, and the expansion bar 6 is arranged in the position shown by the solid line in FIG.

A temple device (not shown) for preventing the cloth W from shrinking in the width direction and a fell plate (not shown) for preventing downward movement of the cloth W near the cloth fell W ₁ are also displaced by the expansion bar 6. It is designed to follow. Further, the reciprocating displacement of the driven nuts 20A and 20B is transmitted to the tension roller 12 via the intermediate lever 13, the rod 15 and the support lever 14.

Ball screw 18a and driven nuts 20A, 2
There is no sliding load existing in the worm mechanism between 0B and 0B, but only a rolling load. The rolling load is considerably smaller than the sliding load, and the driving force transmission efficiency from the ball screw 18a to the driven nuts 20A and 20B is very good as compared with the worm mechanism. Therefore, as compared with the conventional method using the worm mechanism, it is possible to use a small-capacity motor that is small and advantageous in cost as the servo motor 22. Also, the ball screw 18a, the ball and the driven nut 2
The wear between 0A and 20B does not occur due to a small rolling load, and the driven nuts 20A and 20B are preloaded on the ball screw 18a. Therefore, the placement accuracy of the driven nuts 20A and 20B with respect to the normal zero terry amount position and the terry amount present position is always extremely high, and the driven nuts 20A and 20B are not displaced from the normal terry amount zero position and the terry amount present position. Absent. That is, the expansion bar 6 is always arranged with high accuracy at the regular position at the time of beating in both the first pick and the loose pick. Therefore, the cloth fell W ₁ is always arranged with high accuracy at the regular position at the time of beating in both the first pick and the loose pick. This always provides a proper beating force and the desired terry amount, which ensures the quality maintenance of the pile fabric.

Further, since the amount of displacement of the driven nuts 20A, 20B can be adjusted steplessly, the terry amount can be adjusted steplessly to form a pile of arbitrary length. The present invention is, of course, not limited to the above-mentioned embodiment, and for example, FIG.
The driven nut 20A and the rear wall 19 of the support box 19 as shown in FIG.
a and between the driven nut 20B and the front wall 1 of the support box 19.
An embodiment in which the flex covers 27A and 27B are interposed between 9b and 9b is also possible. Both flex covers 27A, 2
7B expands and contracts due to the reciprocating movement of the driven nuts 20A and 20B, and the ball screw 18a moves to the flexes cover 27A and
Always covered by 27B. When the cotton wool adheres to the ball screw 18a, the cotton wool is caught between the ball screw 18a and the ball or between the ball and the driven nuts 20A and 20B. If there is such a bite, the rolling load increases. However, the flex cover 27A,
27B prevents the fly thread from adhering to the ball screw 18a,
An increase in rolling load is prevented.

Further, as shown in FIG.
9 to the outside of the support box 19 in a sealed state, and the first arm 22a and the second arm 22a driven by the ball screw 18a.
An embodiment in which the arm 22b is separate and fixed to the support shaft 21 is also possible. In this way, the support box 19 can be used as an oil bath, and the ball screw 18a and the slider 25 are oiled to prevent wear and seizure, and
It is possible to prevent the cotton wool from adhering to the drive unit in the support box 19.

Further, in place of the driven nut rotation preventing structure of the slide guide system using the slider 25, a driven nut rotation preventing structure of the rolling guide system can be adopted. If the driven nuts 20A and 20B rotate on their own axis, this rotation acting force acts on the displacement direction conversion lever 22 in the axial direction of the support shaft 21, and the displacement direction conversion lever 2
The smoothness of 2 hinders the rotation. That is, the driving force transmission efficiency is reduced. The driven nut rotation prevention structure prevents such a reduction in driving force transmission efficiency, but in the slide guide system, a sliding load is generated between the slider 25 and the guide 26. The rolling guide system only produces a rolling load smaller than the sliding load, and the rolling guide system further contributes to the improvement of the driving force transmission efficiency as compared with the sliding system.

In the present invention, it is also possible to employ an embodiment in which driven nuts are fixed to both sides of the expansion bar, and the expansion bar is reciprocally moved back and forth by the forward and reverse rotations of the ball screw to perform terry motion. is there.

Further, the present invention can be applied to a pile loom of a beating position changing system as disclosed in Japanese Patent Laid-Open No. 2-47334.

[0025]

As described in detail above, according to the present invention, the driving force of the drive motor for performing the terry motion is transmitted to the terry motion member via the ball screw mechanism, so that the capacity of the drive motor is reduced. It has an excellent effect that reduction and avoidance of quality deterioration of pile fabric can be achieved.

[Brief description of drawings]

FIG. 1 is a side view of the entire loom.

FIG. 2 is an enlarged side sectional view showing a ball screw mechanism.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged side sectional view showing another example.

FIG. 5 is a cross-sectional view showing another example.

[Explanation of symbols]

6 ... Expansion bar serving as terry motion member, 18 ... Servo motor serving as drive motor, 18a ... Ball screw, 20A, 20B ... Driven nut serving as driven body,
22 ... Displacement direction conversion lever that constitutes a displacement transmission mechanism, 2
3 ... Links constituting displacement transmission mechanism, 27A, 27B ...
Flex cover.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuki Suzuki, 2-chome, Toyota-cho, Kariya city, Aichi stock company Toyota Industries Corp.

Claims (2)

[Claims] 1. A pile loom for forming a pile by changing a relative distance between a beating position of a reed and a cloth cloth front, and a driven body screwed to the ball screw is rotated by the ball screw so that a terry amount is zero. A ball screw mechanism that is switched between a position and a position with a terry amount, a terry motion member that changes the relative distance between the reed hitting position of the reed and the cloth fell in cooperation with the displacement of the driven body, and the ball screw. A pile forming device in a pile loom including a drive motor for reciprocally rotating the machine. 2. The ball screw is covered with a flex cover that expands and contracts according to the displacement of the driven body.
A pile forming device for a pile loom according to item 1.