JPH06192942A - Production of chenille woven fabric - Google Patents

Abstract

PURPOSE:To assure normal pattern weaving by dealing with the variation in chenille yarn extension depending on picking tension and the variation in rapier stroke due to loom vibration. etc., in weaving a chenille woven fabric so that chenille yarns with pattern elements such as in patterned yarns are picked using a rapier. CONSTITUTION:In weaving a chenille woven fabric so that chenille yarns Y with pattern elements are picked with a rapier 3 to weave a pattern, the chenille yarns Y under picking are gripped with a gripper 20 and moved to the side opposite to the picking side; at the beginning of such movement or toward the end of the picking, the ear mark A at the front side of the picking range for the yarns Y is put to constant point detection by a sensor 1; based on the result, the ear at the front side of the yarns Y is restrained in place with a clamp 14, and under this restraint, the above-mentioned movement by the gripper 20 is continued and another ear mark B at the other side of the yarns Y is put to constant point detection by a second sensor 2; based on the result, the movement by the gripper 20 is stopped at a specified time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a chenille fabric by a loom for weaving a pattern by wefting a chenille yarn with a pattern element such as a picture yarn with a rapier.

[0002]

2. Description of the Related Art Conventionally, in weaving a chenille fabric in which chenille yarn is wefted by a rapier, as well known to those skilled in the art, the pattern woven by wefting the chenille yarn has an unclear contour. Is forced to become. The cause is generally in the following events.

Unlike ordinary decorative twisted yarns, chenille yarns are extremely stretchable, and their extensibility is comparable to that of wool yarns.
For this reason, the chenille yarn is strongly affected by fluctuations in the rapier stroke due to vibration of the loom and the like, and the variation in elongation with respect to the weft-insertion tension is large, resulting in uneven weft-insertion positions by the rapier.

Thus, even if the pattern elements in the chenille yarn are positionally qualitative, in most cases,
The weft insertion of the chenille yarn by the rapier causes misalignment.

Regarding measures against weft misalignment of chenille yarn,
It has not been solved yet. By the way, when weaving Kasuri using a rapier-type loom, we have used Kasuri threads with ear marks, and when the weft insertion of Kasuri threads by rapier has progressed to a specified time, the ear marks are detected by a sensor and the gripper is used. Attempts have been made to match the Kasuri pattern of the specification that regulates the weft insertion by grasping the thread, but this has a problem in that the Kasuri pattern is adjusted by the unified fixed point control of the weft insertion according to the specification. In other words, this pattern pattern does not work as a measure against variations in elongation with respect to tension of weft insertion and fluctuations in rapier stroke.

[0006]

An object of the present invention is to weave a chenille woven fabric in which chenille yarn is weft-inserted by a rapier and overcome variations in elongation of the chenille yarn with respect to weft-insertion tension and variations in rapier stroke,
It is to guarantee the weaving of the pattern without the pattern collapse.

[0007]

In order to solve the above problems, the present invention relates to a weaving of a chenille fabric for weaving a chenille yarn with a pattern element such as a picture yarn by a rapier and weaving a pattern. Grasp the chenille yarn with the gripper and move it to the opposite weft inserting side, and at the beginning of the movement or at the end of the weft inserting of the chenille yarn, put the first ear mark on the tip side of the weft inserting range of the chenille yarn The sensor of No. 1 detects at a fixed point, and based on this detection, the tip side ear portion of the chenille yarn is restrained at a fixed position by the clamp, and the movement of the gripper is continued under this restraint to attach to the other end side of the chenille yarn. It is characterized in that the generated second ear mark is detected by a second sensor at a fixed point, and based on the detection, the movement of the gripper is stopped at a predetermined time.

By adopting this structure, the intended problem solution can be achieved as will be described later.

For the reason to be described later, in the present invention having the above-mentioned structure, the chenille yarn under the weft insertion, which is clamped by the clamp, is supplied from the yarn during or while the chenille yarn is pulled by the gripper to the opposite weft insertion side. It is preferable that the reed portion of the yarn extending toward the side is brought closer to the side of the second sensor by the yarn shifting.

In the present invention having the above structure, when the loom is a rapier loom, the reason will be described later.
When the chenille yarn weft is inserted, the chenille yarn finger advanced to a required position so as to extend the yarn into the space corresponding to the weft insertion is held by the stopper in the advanced position at least until the beating is almost halfway. Is desirable.

[0011]

The present invention will now be described with reference to the drawings showing an embodiment of a loom used for weaving a chenille fabric according to the present invention.

In the figure, 1 is a first sensor, 2 is a second sensor, and these sensors 1 and 2 weave a pattern by weft-inserting a chenille yarn Y with a pattern element like a picture yarn by a rapier 3. The loom A to be taken out is equipped with the sensor 1 at the right end of the shed and the sensor 2 at the left end of the shed. The loom may be a rapier loom, or may be a shuttle loom to which a rapier for weft-inserting chenille yarn and a necessary member attached thereto are added. As the latter type, for example, a known type shown in the invention of Japanese Patent Publication No. 3-80869 can be applied. The illustrated one is a rapier loom. An optical reflective sensor can be applied as the sensors 1 and 2. The first and second sensors 1 and 2 may be installed substantially on the reed 4 of the loom A.

Substantially, the first sensor 1 is attached to the reed 4 by mounting a support rod 5 on the reed 4 and mounting the sensor 1 thereon.
Can be fixed (FIGS. 2 and 3). The support rod 5 has a lower end located slightly above the shuttle and extends vertically in a fixed position. The support rod 5 can move up and down on a frame 7 fixed to the reed 4 by a fixture 6. Support rod 5
Has a chip 8 (FIG. 4) at the lower end, and the sensor 1 is embedded in the chip 8 downward. A portion of the tip 8 facing the lower surface of the sensor 1 is a concave portion 9 serving as a yarn path for the yarn Y. The concave portion 9 can be formed in a gradually expanding shape downward.

The lower surface of the tip of the arm 11 (corresponding to the left end in FIG. 3) faces the upper end of the support rod 5. The arm 11
Has a configuration similar to an arm 16 for driving a support rod 15 of the clamp 14 to be described later.
Similarly, the actuator is driven by a solenoid (not shown) to be angularly displaced counterclockwise in FIG. 3, and the support rod 5 is pushed down by the lower surface of the tip portion thereof. When the solenoid is demagnetized, the support rod 5 is returned by the bias of the spring 12 which is compressed by pushing down the support rod 5.

Substantially, the second sensor 2 can be attached to the reed 4 by fixing the support rod 10 on the reed 4 and mounting it on the reed 4 (FIG. 1). The support rod 10 extends vertically at a fixed position near the back surface of the reed 4, and has a lower end portion extending laterally toward the reed 4 and a tip end thereof facing the shed. The support rod 10 is supported by a bracket 13 fixed to the reed 4. The sensor 2 is attached to the tip of the laterally lower end of the support rod 10.
Is attached to face forward.

Reference numeral 14 denotes a clamp, which is located in the vicinity of the right side of the first sensor 1 and is provided at a position corresponding to the right end of the shuttle. The equipment of the clamp 14 may be installed substantially on the reed 4 of the loom A.

Substantially, the clamp 14 can be attached to the reed 4 by mounting a support rod 15 on the reed 4 and fixing the clamp 14 thereto (FIGS. 2 and 3).
The lower end of the support rod 15 is located slightly above the shuttle and extends vertically at a fixed position. The support rod 15 can move up and down on the frame 7 fixed to the reed 4 by the attachment 6. The clamp 14 is connected to the lower end of the support rod 15.

The lower surface of the tip (left end in FIG. 3) of the arm 16 faces the upper end of the support rod 15. The arm 16 is
When the solenoid 17 is excited, it is angularly displaced downward through the cable 18 in the counterclockwise direction in FIG. 3, and the support rod 15 is pushed down by the lower surface of the tip portion thereof. When the solenoid 17 is demagnetized, the support rod 15 is returned by the bias of the spring 19 which is compressed by pushing down the support rod 15.

Reference numeral 20 is a gripper, and the gripper 20 is mounted at a fixed position on the left side of the reed 4. The equipment of the gripper 20 may be mounted on a fixed portion (not shown) of the loom A.

The gripper 20 can be attached to the loom fixing section by connecting the frame 22 to the loom fixing section and equipping the frame 22 with the gripper 20 (FIG. 1). The gripper 20 may be of a sandwich plate type operated by a solenoid 21. The solenoid 21 is shown schematically. The solenoid 21 is moved back and forth in the left-right direction in FIG. 1 by a feed screw 25 that is rotated in the forward and reverse directions by a reversible motor 24.

When the finger 27 for the chenille yarn Y in the loom A moves to the forward position, the yarn puller 26 brings the tip of the finger 27 slightly forward near the right side of the yarn path 23. It is equipped at a position corresponding to the position of the 26 tip. When the finger 27 moves to the forward position, it is held by the stopper 30 at the forward position for a predetermined period of time. The fingers 27 may be the same as those known per se. As the stopper 30, a solenoid (not shown) drive type may be used.
The equipment of the yarn pulling member 26 can be installed substantially on the reed 4 of the loom A.

Substantially, the thread shifter 26 is attached to the reed 4 by connecting the bracket 29 to the sley angle 40,
The yarn puller 26 may be attached to this (FIG. 1). As the yarn puller 26, a rotary arm type driven by a rotary solenoid 28 can be used. The rotary solenoid 28 is attached to the bracket 29.

The chenille yarn Y is provided with a first ear mark I on the front end side of each of the one weft insertion areas and a second ear mark I on the other end side. The distance between the ear marks (i) and (ii) is a little shorter than the distance between the sensors 1 and 2 under no tension of the chenille yarn Y.

The chenille yarn Y is on the front side of the reed 4, that is, in FIG.
The left side passes through the yarn paths 23, 31 and 32 to the side opposite to the reed 4 and continues to the chenille yarn bobbin (not shown) on the loom A.

The chenille yarn Y is weft-inserted by the rapier 3 in the same manner as in the conventional case. Finger 2 when wefting
No. 7 is advanced to the required position in the same manner as in the past so that the chenille yarn Y is extended in the space corresponding to weft insertion.

The first sensor 1 stands by at a position corresponding to a preset position and up to a predetermined time point at a position corresponding to the upper part of the shovel so as not to interfere with the running of the rapier 3.

Under this waiting condition, the rapier 3 advances to grasp the chenille yarn Y and pull it to the right in FIG. 1, that is, weft insertion. At the time of this weft insertion, the first sensor 1 is at the above height and is not sensitive to the first ear mark Y of the chenille yarn Y running below.

When the rapier 3 finishes pulling the chenille yarn Y, the solenoid of the support rod 5 is excited and the arm 11 is driven to allow the first sensor 1 to detect the first ear mark I so that the support rod is low. It descends together with 5.

At the same time, the motor 24 feeds the screw 25.
Is driven to move the gripper 20 together with the solenoid 21 in the reverse weft insertion direction (left in FIG. 1). During the movement, the gripper 20 is closed by the excitation of the solenoid 21 and holds the chenille yarn Y. This gripper 20
At the beginning of the movement of the chenille yarn Y to the anti-weft insertion side,
The first sensor 1 detects the first ear mark at a fixed point.

Alternatively, according to another setting, for example, the rotational phase of the loom is detected by a method known per se, and according to the setting based on the detected value, the rapier 3 descends to a fixed position at the end of weft insertion of the chenille yarn Y. The sensor 1 detects the first ear mark I, and based on that, the gripper 20 moves to the left in FIG. 1 while holding the chenille yarn Y.

The first sensor 1 is substantially mounted on the reed 4, and the portion of the tip 8 with the first sensor 1 facing the lower surface of the sensor 1 serves as a concave portion 9 as a yarn path. That is, the lowering of the first sensor 1 ensures the positioning of the first ear markey with respect to the sensor 1 in the scoop, and the fixed point detection of the first ear markey by the first sensor 1 is performed. Make certainty high enough. The certainty of this fixed point detection is also improved by an ear thread (not shown).

When the first sensor 1 detects the first ear mark I at a fixed point, the solenoid 17 of the support rod 15 is excited, the arm 16 is driven, and the clamp 14 is moved to the support rod 1.
5, the clamp 14 is pressed down integrally, and the clamp 14 presses the tip side ear of the chenille yarn Y extending to the shuttle onto the race.

That is, the clamp 14 operates at a predetermined time,
The tip side ear of the chenille yarn Y extending in the shuttle is restrained. Therefore, the front end side of the weft insertion range of the chenille yarn Y is reliably regulated in the position in the weft direction.

The chenille yarn Y under the weft insertion whose ears are restrained by the clamp 14 is pulled to the opposite weft insertion side by the above-mentioned movement of the gripper 20 to the left in FIG.

Thus, the second selvage mark on the other end side of the chenille yarn Y under the restraint on the tip side is displaced to the position of the second sensor 2, and when this is detected by the second sensor 2 at a fixed point, this The motor 24 is stopped based on the
The movement in the reverse weft insertion direction is stopped at a predetermined time. That is,
The chenille yarn Y in the shuttle, whose tip ears are restrained,
By the operation of the gripper 20, the gripper 20 is extended to the other end side to a certain extent. Therefore, the position in the weft direction of the chenille yarn Y is surely regulated also on the other end side of the weft insertion area.

When the chenille yarn Y under the constraint weft insertion is pulled by the gripper 20 toward the anti-weft insertion side or during the pulling, the rotary solenoid 28 is excited and the yarn pulling 2
6 is driven to the side of the chenille yarn Y, and the portion of the yarn extending from the yarn Y to the supply side thereof near the reed 4 is moved to the side of the second sensor 2. The operation of the yarn shifting 26 is performed by the chenille yarn Y.
The tension is applied to the yarn to effectively pull the yarn, and the certainty of the fixed point detection of the second ear mark by the second sensor 2 is enhanced.

When the chenille yarn Y is pulled, the chenille yarn on the front side of the gripper 20 is loosened. Therefore, it is desirable to eliminate the slack in order to obtain a steady accuracy of the next weft insertion of the chenille yarn. . This slack elimination may be performed by an appropriate specification known per se.

After the movement of the gripper 20 in the counter-weft insertion direction is stopped, beating is performed in that state, that is, in the state where the chenille yarn Y under the restraint weft insertion is pulled toward the anti-weft insertion side. At an appropriate time from the middle of the beating to a little before the end, the first sensor 1, the clamp 14,
The gripper 20 and the thread shifter 26 are reset respectively. At this time, the chenille yarn Y is pushed to the cloth fell side by the beating, to the extent that the warp yarns of the loom A are not displaced in the weft direction.

The finger 27, which has advanced to the required position when wefting the chenille yarn Y, is held by the stopper 30 at least until the beating at the advanced position reaches approximately halfway, and the finger 27 is normally operated by a spring bias (not shown). Is prevented from returning. After the chenille yarn Y is pushed to the cloth fell side by the beating, the stopper 30 is reset and the above-mentioned return prevention is released.

The automatic weft position regulation of the weft insertion of the chenille yarn described above is performed every time the weft insertion of the chenille yarn is performed, and a pattern is woven by the accumulation of the weft insertion of the chenille yarn.

The weft-inserted chenille yarn has an automatic cutter (not shown) in which the rear end side of the weft-insertion area is the same as the conventional one.
Is cut by.

The weft insertion by the ground rapier is no different from the conventional method. Therefore, the illustration of the weft insertion system for the ground latitude is omitted except for the rapier 3.

As described above, in the present invention, the weft insertion of the chenille yarn by the rapier is automatically restricted in the weft position, and the automatic weft insertion pattern matching is performed.

As described above, in the present invention, the weft insertion pattern of the chenille yarn is adjusted by the rapier in the manner that the weft position is regulated not only on the front end side but also on the other end side of the chenille yarn extending to the shuttle. Since this is performed, the front end side of the weft insertion range of the chenille yarn is constrained, the fixed point detection of the ear mark on the other end side of the yarn is performed while the yarn is stretched to the other end side to a certain extent, and The automatic weft insertion pattern adjustment of the yarn is achieved without being affected by the variation of the elongation of the chenille yarn with respect to the weft insertion tension and the fluctuation of the rapier stroke.

[0045]

As is apparent from the above description, according to the present invention, when weaving chenille yarn with a rapier and weaving a pattern with the chenille yarn, variations in elongation of the chenille yarn with respect to weft-inserting tension and rapier It has the effect of overcoming the fluctuation of the stroke and guaranteeing the weaving of a pattern without pattern collapse.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of an embodiment of the present invention with a part cut away.

FIG. 2 shows a detailed front view of the mounting arrangement of the first sensor and clamp in the embodiment shown in FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a perspective view of the chip with the first sensor shown in FIGS.

FIG. 5 is a front view showing the outline of the weft insertion range of the chenille yarn used in the present invention.

[Explanation of symbols]

 Y chenille thread a 1st ear mark b 2nd ear mark 1 1st sensor 2 2nd sensor 3 Rapier 4 Reed 14 Clamp 20 Gripper 26 Threader 27 Chenille thread Finger 30 Stopper

Claims (3)

[Claims] 1. A method of manufacturing a chenille fabric using a loom, wherein a chenille yarn with a pattern element as in a picture yarn is wefted by a rapier to weave a pattern, and the chenille yarn under the weft insertion is gripped by a gripper to insert an anti-weft yarn. First, which is attached to the tip side of the weft inserting range of the chenille yarn at the beginning of the movement or at the end of weft insertion of the chenille yarn.
The ear mark of the chenille yarn is detected at a fixed point by the first sensor, and based on this detection, the tip side ear portion of the chenille yarn is restrained at a fixed position by the clamp, and the movement of the gripper is continued under this restraint to move the chenille yarn A method for manufacturing a chenille fabric, comprising detecting a second ear mark attached to the other end side by a second sensor at a fixed point and stopping the movement of the gripper at a predetermined time based on the detection. 2. The method for manufacturing a chenille fabric according to claim 1, wherein the chenille yarn under the weft insertion, which is restrained by a clamp, is pulled from the chenille yarn when the gripper is moved to the side opposite to the weft inserting side or during the pulling. A method for manufacturing a chenille woven fabric, characterized in that a reed portion of the yarn extending to the supply side is brought closer to the second sensor side by yarn pulling. 3. The method for producing a chenille fabric according to claim 1, wherein the loom is a rapier loom, and the chenille yarn is advanced to a required position so as to extend the yarn into a space corresponding to the weft insertion when the weft insertion is performed. A method of manufacturing a chenille fabric, characterized in that the finger is held by a stopper in its advanced position at least until the beating is almost halfway.