JPH032971B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a foil yarn inserting device for a loom, and in particular, to a foil yarn weft inserting device for a loom, in which a long roll of foil yarn is placed in a fixed position, and the end portion of the foil yarn pulled out from the weft insertion device is provided. is placed on standby at a predetermined location, the thread end of the foil yarn is gripped by a rapier or gripper shuttle, and the weft is inserted, the grip is released at a predetermined time, and the inserted foil yarn is inserted into the waiting yarn end of the foil yarn. The present invention relates to a foil thread weft inserting device for a loom that cuts using mechanical force-driven scissors arranged at corresponding locations.

The foil thread used for weft insertion is called Hikihaku by those skilled in the art, and is a type of flat thread similar in form to Kankirihaku or Ginkirihaku. , the front and back may be reversed. If the weft-inserted foil yarns are turned inside out, the resulting fabric will be defective.
It is desirable to be able to detect whether the weft is inserted inside out or not.

Conventional technology and its problems Conventionally, as a means of detecting whether or not the weft insertion of foil yarn is reversed, the method of detecting whether or not the weft insertion of foil yarn is reversed is to detect the part of the inserted foil yarn protruding outside the parallel body of warp threads on the loom. A light emitter is placed in a fixed position so as to be diagonal to the plane, and a light receiving element is placed in a fixed position so as to be perpendicular to the plane of the foil yarn. Based on the fact that the amount of diffusely reflected light due to the metallic luster on the surface and the diffusely reflected light due to the matte surface on the back of the foil yarn is significantly different, when the light projected from the light emitter hits the surface of the foil yarn and is reflected (the foil yarn When the weft is inserted face up), the reflected light does not enter the light receiving element, and when the light projected from the emitter hits the back side of the foil yarn and is reflected (when the foil yarn is inserted inside out), the reflected light does not enter the light receiving element. There is a known method that uses the phenomenon of diffusely reflected light entering a light receiving element to detect the front and back sides of a weft-inserted foil yarn based on the difference in the amount of light entering the light receiving element (Japanese Utility Model Publication No. 59-29972).

However, in the case of conventional weft insertion foil yarn front and back detection,
No measure was taken to control the position of the edges of the weft-inserted foil yarns protruding from the warp parallel body in the front-rear direction and vertical direction of the fabric, and the relative positions occupied by the edges of the weft-inserted foil yarns were not taken. As in the case of foil yarn weft insertion using the conventional method, it is inevitable that the weft insertion results will be different, and it is not possible to accurately detect the front and back sides of each weft insertion foil yarn using the light emitter and light receiving element. .

The present invention solves the problems caused by the prior art described above, and provides a foil yarn weft inserter for a loom having a weft inserting foil yarn front and back detection function that guarantees the achievement of accurate front and back detection for all of the weft inserted foil yarns. The purpose is to provide equipment.

Means for Solving the Problems The device of the present invention for achieving the above object has a long winding of foil yarn placed in a fixed position, and the end of the foil yarn pulled out from this is placed at a prescribed location. The thread end of the foil thread is held in place with a rapier or a grip shuttle (hereinafter referred to as
(abbreviated as rapier) to insert the weft,
The grip is released when the rapier reaches a fixed position during the weft insertion movement, and the inserted foil yarn is removed by mechanical force-driven scissors placed at a location corresponding to the waiting yarn end of the foil yarn. It is a foil yarn weft inserting device for a loom of a cutting type, and the foil yarn long roll is marked with a mark on the front or back side of a portion corresponding to the fabric selvedge in each weft insertion range. Ok,
A yarn path for the foil yarn is provided at a location slightly upstream of the waiting foil yarn from the scissors, and a sensor is installed to detect the mark on the foil yarn under the weft insertion when the rapier inserts the weft. A weft insertion detection sensor is disposed at a location corresponding to the mark and operates to detect weft insertion before the rapier releases its grip on the weft insertion foil yarn and before the scissors cut the foil yarn. The above-mentioned loom is equipped with the above-mentioned mark detection sensor, and the above-mentioned mark detection sensor is capable of detecting the front side and the back side of the weft-inserted foil yarn in addition to the weft-insertion detection of the above-mentioned weft-insertion detection sensor by detecting and non-detecting the mark. There is.

Function In the present invention, the foil yarn drawn out from the long roll of foil yarn placed in a fixed position is made to stand by at a predetermined position, is gripped by a rapier and inserted into the weft, and the rapier is inserted into the weft. When the weft insertion movement (in other words, the backward movement) reaches a fixed position, that is, moves backward, the grip is released, and the inserted foil yarn is cut at a predetermined point by mechanical power-driven scissors in a fixed position, and the following In the same way, weft insertion of the foil yarn with the rapier and cutting with the scissors at predetermined locations, that is, locations corresponding to one weft insertion range of the long rolled foil yarn, are repeated.

During the weft insertion, the weft insertion detection sensor is activated before the rapier releases its grip on the weft insertion foil yarn and before the scissors cut the foil yarn, thereby detecting weft insertion.

On the other hand, in the above-mentioned weft insertion, when the foil yarn is inserted in the normal direction (front side), the mark on the front or back side of the weft insertion foil yarn edge also occupies the normal front and back sides, When the mark is detected by the mark detection sensor at the position corresponding to the mark, and the foil yarn is inserted with the front and back reversed, the mark of the weft insertion foil yarn is also facing the reversed side, that is, the mark detection sensor. Since the mark occupies the side where there is no mark, the mark detection sensor does not respond.

This mark detection sensor is capable of detecting marks,
The non-detection is responsible for detecting the front and back sides of the weft-inserted foil yarn in conjunction with the weft insertion detection by the weft insertion detection sensor, and the detection timing is before the rapier releases its grip on the foil yarn and when the scissors have detected the foil yarn. corresponds to a point in time before the disconnection.

In the above-mentioned weft insertion, the foil yarn whose yarn end is waiting at a predetermined location is fixed or regulated in position by the yarn path at a location slightly upstream of the scissors, and is in a waiting state where it maintains a constant posture. Under this condition, the foil yarn is gripped by a rapier and inserted, so that the foil yarn is positioned at a fixed relative position with respect to the shed in the longitudinal and vertical directions during the weft insertion.

Effects of the Invention As described above, according to the present invention, the front and back sides of the weft-inserted foil yarn are detected by the mark and the sensor that detects the mark at a time point before the rapier releases the foil yarn grip and before the scissors cut the foil yarn. In this way, the weft inserting foil yarn can still be positioned in a certain position in the longitudinal and vertical directions of the fabric on the loom.
Accurate detection of the front and back sides of all weft-inserted foil yarns is guaranteed.

In the present invention, the marks made on the front or back surface of each predetermined part of the weft insertion area of the long roll of foil yarn are arranged to correspond to both the left and right ears of the fabric, and the mark detection sensors are arranged at the left and right sides of the fabric. When corresponding to each of the markings for the selvedge placement, the inserted foil yarn must be reversed, not over the entire weft insertion, but on either the front or rear side. However, this can be detected without any problem, and the usefulness of the device of the present invention is improved.

In the present invention, if a warp splicing thread that is interwoven with the selvedge of the weft-inserted foil yarn or crossed under the selvage is incorporated into the device of the present invention, such a warp splicing thread can be omitted. Compared to the case where the weft-inserted foil yarn is inserted, the vertical positioning of the selvedge protruding from the fabric warp parallel body is better, so the mark detection sensor is more certain to detect the mark on the weft-inserted foil yarn. Improves quality.

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, 1 is a rapier in a loom, 2 is a mechanical power-driven scissor placed at a location corresponding to the standby yarn end of the foil yarn shown below, and 3 is a long winding of foil yarn placed at a fixed position in the loom. The rapier 1 is reciprocated during shedding of the warp threads in the same manner as before, and the scissors 2 are sheared in the same manner as before. In the scissors 2 shown in the figure, a movable blade holder 2b to which a movable blade 2a is attached and which performs shearing operation occupies the side of the fixed scissor blade 2c that is further away from the fabric selvage (the left side in FIG. 2). The long roll of foil yarn 3 is formed by forming a metal film on the surface of a base sheet made of yarn, more preferably a long slip of Japanese paper or plastic film, by vacuum deposition, lamination, or an appropriate method during transfer. Foil thread material that has a surface texture such as gold leaf, silver leaf, or sunako leaf, or foil thread material that has been given a suitable appearance and texture by printing or other appropriate methods on the surface of a similar base sheet is made into a narrow width. The foil yarn obtained by slitting can be applied, and the long roll of foil yarn 3 has marks 4 on the front or back side of the part corresponding to the fabric selvedge in each weft insertion area. Apply in advance. In the case shown,
The marks 4 are arranged corresponding to both the left and right edges of the fabric in each one weft insertion area of the long foil yarn wound material 3.

The foil yarn long winding material 3 in the above-mentioned fixed position is used to transfer the foil yarn 3a to the thread path 5, and performs a pinch-feeding operation in which the amount of the foil yarn 3a is slightly less than the amount of the foil yarn 3a being pulled out during weft insertion, which will be described later, using the rapier 1. The yarn is pulled out through the rollers 6 and the yarn path 7, and the end of the yarn is kept waiting at a predetermined location. The standby foil thread is designated in FIG. 2 by the reference numeral 3a'. In the figure, the yarn path 5 is shown in a perspective view for the sake of ease of understanding, but its installation is such that the surface that matches the inner space of the yarn path traverses the drawn foil yarn. This is the mode.

A yarn path 15 for the foil yarn 3a is provided at a location slightly upstream of the scissors 2 of the standby foil yarn 3a'. The yarn path 15 may be one having a groove on the upper surface for guiding the thread travel of the foil yarn 3a or one having a tubular shape. The illustrated one is of the former type (grooves are omitted).

When performing weft insertion as described below with Rapier 1,
A sensor 8 for detecting the mark 4 of the foil yarn under the weft insertion is arranged at a location corresponding to the mark 4. Needless to say, the sensor 8 detects the position corresponding to the mark 4 on the front side of the weft inserting foil yarn when the mark detection 4 is on the front side of the foil thread 3a, and on the back side of the foil yarn when the mark 4 is on the back side. This is the arrangement of the locations corresponding to mark 4. As the mark detection sensor 8, an optical sensor such as an optical reflector sensor can be used, and the mark 4 can be a color mark that is detected by the sensor 8, for example, black.

Reference numeral 9 denotes a clamp for the cut end of the drawn-out foil thread 3a, and the clamp 9 is placed at a fixed position corresponding to the back surface of the movable blade holder 2b (the left side in FIGS. 2 and 4). has been done. The clamp 9 is biased by a spring of such strength that the end of the cut thread is clamped by the clamp 9 and released by pulling the end of the thread under the grip of the rapier 1, which will be described later. being pushed to the side. 10 is a spring for urging the spring, and 11 is a spring strength adjusting screw.
The clamp 9, spring 10 and adjustment screw 11 are mounted on a fixed mounting 1 on the loom frame (not shown).
Equipped with 2. 13 is a pressing pin for the clamp 9, and 14 is a ball interposed between the pin 13 and the spring 10. The clamp 9 is pressed against the back surface of the movable scissors blade holder 2b, which is in a closed state relative to the fixed scissors blade 2c, by the spring bias of the spring 10.

A certain point in time before the rapier 1 releases its grip on the weft-inserted foil yarn (described later) and before the scissors 2 cuts the foil yarn, for example, immediately before the release and cutting (however, the release and cutting are performed at approximately the same time). The loom is equipped with a weft insertion detection sensor 20 that is activated to detect weft insertion when the weft is inserted. The sensor 20
For this purpose, a sensor similar to the mark detection sensor 8, a proximity switch, etc. may be applied, and a movable member in the foil thread weft insertion device, for example, the rapier 1 or another movable member linked thereto, may be positioned at a predetermined position during foil thread insertion. It may be activated at a predetermined time by an appropriate method such as placing the sensor at a location corresponding to detecting the displacement.

Reference numeral 16 denotes a presser foot disposed further upstream of the thread path 15 of the drawn-out foil yarn 3a, and the presser foot 16 is used when the rapier 1 is at rest and when the rapier 1 is moving forward until it approaches the forward limit in the forward movement. The foil yarn 3a is restrained under pressure until it reaches the forward limit, and the restraint is released when the rapier 1 approaches or reaches the forward limit, and the release is continued while the foil yarn is being inserted by the rapier 1. There is. This presser foot 16
The pressing and releasing of pressure at specified times can be controlled by appropriate means.
For example, this can be done via an interlocking mechanism by actuating a suitable moving member of the system for reciprocating the rapier 1. 1
7 is a fixed presser foot that faces the presser foot.

18 is a hit placed at a fixed position on the return movement (weft insertion) running path of the rapier 1;
When the thread gripper 19 of the rapier 1 retreats to the home position during the weft insertion movement, the tip of the lever portion 19a of the thread gripper 19 of the rapier 1 collides with the corresponding thread gripper 18, the thread gripper 19 is released, and the weft insertion foil thread is no longer held. To be released.

Reference numeral 21 designates a spring that gives the rapier thread gripper 19 a tendency to close. Reference numeral 22 denotes a foil yarn slack-removal weight whose required side is a reflective surface, which is suspended in the middle of the foil yarn 3a between the pinch feed roller 6 and the yarn path 7 so as to be vertically movable, if necessary. It is a board. The left and right side edges of the weight plate 22 are fitted into opposing guide grooves (not shown) extending in the vertical direction, and the vertical movement is guided by the grooves. The weight plate 2
2, a sensor 23 that captures the reflected light from the reflective surface is placed at a fixed position on the side corresponding to the reflective surface. ), and drives the roller 6 at a predetermined time based on the position detection of the weight plate 22,
make it stop. As the sensor 23, an optical sensor similar to the mark detection sensor 8 described above can be used. Pinch feed roller 6 is rapier 1
It is activated during weft insertion as described below. 2
Reference numeral 4 indicates an operating lever of the movable scissor blade holder 2b, and the lever 24 is rotated in the vertical direction in FIG. 4 at a predetermined time through an interlocking medium (not shown) in conjunction with the reciprocation of the rapier 1.

After the following weft insertion is performed using the rapier 1, an appropriate number of warp splicing yarns are placed on the loom at locations corresponding to the ears of the inserted foil yarns and at locations other than the mark detection sensors 8, 8. The warp splicing threads are interwoven with the weft-inserting foil thread selvage by the same means as for general warp paper, or intersect with the selvage under the selvage. It is sufficient that the weaving is sparse in the warp direction. The warp splint is the first
The woven warp splints therein are shown in the figure with reference numeral 2.
5, and the lower cross or warp splint is designated by 25'. The warp splints shown in FIG. 1 are a combination of woven and undercrossed threads.
The end of the warp splicing yarn 25 to be woven with the weft inserting foil yarn edge is wound around a fabric winding beam (not shown) of the loom (not shown) in the same way as the normal warp yarn W. The warp splint 25' does not need to be wound around the winding beam, and may be kept at a constant value under an appropriate tension.

A loom equipped with the device of the present invention including the above-mentioned parts may be a general shuttle-type power loom, a rapier loom, or a gripper loom. In the illustrated embodiment of the present invention, the loom is a general shuttle-type power loom (FIG. 1), and in FIG. 1, reference numeral 26 indicates a shuttle box and 27 indicates a reed in the power loom. In the case of a typical shuttle-type power loom, the shuttle is used for the same purpose as before.
The power loom is additionally equipped with the above-mentioned parts including the rapier 1, and a shedding control means (not shown) that causes the warp to perform the shedding movement necessary for inserting the foil yarn by the rapier 1. will be added.
This shedding control means may be a warp shedding control means that is known per se.

The foil yarn weft insertion and front/back detection of the weft insertion foil yarn in the illustrated apparatus according to the present invention are as follows.

The foil yarn 3a' is pulled out from the foil yarn long winding material 3 through the yarn path 5, roller 6, yarn path 7 and 15, and the yarn end is held at a predetermined position. The end of the thread is held between the back surface of the movable scissors blade holder 2b and the front surface of the clamp 9 which is pressed against the movable scissors blade holder 2b by the spring bias of the spring 10, as will be described later. In this standby state, the end of the standby foil yarn 3a' assumes an oblique orientation as shown in FIG.

When the weight plate 22 is provided, the weight plate 22 occupies a lowered position due to its weight when the drawn foil thread 3a is in the above-mentioned standby state, and the sensor 23 is located on the reflective surface of the weight plate 22. They are facing each other.

With the foil thread 3a in the standby state, the rapier 1 moves forward (travels to the left in Figures 1 and 2), and the end of the foil thread 3a' in the standby state is held at the rapier fixed side thread grip. 28, the rapier 1 reaches its forward limit. At this time, the thread gripping portion 28 moves the side surface 28a, which corresponds to the upper side in FIG. 5, slightly toward the upper direction in FIG. , and pass through the area by pushing it away. When the rapier 1 moves forward, the presser foot 16 presses and restrains the foil thread 3a until it approaches or reaches its forward limit.

The rapier 1 switches from the limit to the return movement, and at the beginning of the return movement, the thread gripping section 28 moves the standby foil thread 3
When passing through the yarn end point a', the yarn end is held between the yarn gripping section 28 and the yarn gripping body 19 under pressure by the biasing of the yarn gripping body 19 by the spring 21. . In this way, Rapier 1 moves further after that.
The foil yarn 3a is inserted into the weft by the backward motion. Prior to this, the presser foot 1 that was holding down the foil thread 3a above
6 is reset to release the pressing restraint of the foil thread 3a when the rapier 1 approaches or reaches its forward limit. The release of the foil yarn 3a continues during the weft insertion movement of the rapier 1.

At the beginning of the return movement of the rapier 1, the rapier 1
The weight plate 22 is raised by the increase in the pull-out tension of the foil thread 3a as the backward movement progresses (however, the weight plate 22
2). Then, the weight plate 22
occupies a position above the sensor 23, the sensor 23 detects this, and based on this, the pinch delivery roller 6 is driven to send out the foil yarn 3a.
Since the amount of foil yarn fed out by the roller 6 is slightly smaller than the amount of foil yarn pulled out by the retreat of the rapier 1, the foil yarn being inserted by the return movement of the rapier 1 is held at a predetermined pull-out tension.

When the rapier 1 reaches the home position in the backward motion, the lever portion 19a of the rapier thread gripping body 19 is pressed against the hit 18.
The tips of the foil thread collide with each other, and the thread gripping body 19 opens, releasing the grip of the foil thread end by the rapier thread gripping body 19.

From the beginning of the advance of the rapier 1 until the weft insertion by the rapier 1 reaches an appropriate point, for example, a point slightly before the release of the rapier thread gripping body 19, the movable scissor blade holder 2b is held against the fixed blade 2c together with the movable blade 2a. Maintain the closed state, that is, the state under the traveling path range of Rapier 1 (Fig. 6),
When this point is reached, the holder 2b moves the movable blade 2
It rotates in the counterclockwise direction in Figure 6 along with a, passes through the state shown in Figure 7 on the way, and is displaced to a position where it is open to the fixed blade 2c (Figure 8), and then reverses in the clockwise direction in Figure 8. With this reverse rotation, the movable blade 2a and the fixed blade 2c shear a predetermined portion of the end of the foil yarn 3a'.

The thread end of the foil thread 3a' that is cut at a predetermined location is parallel to the movable blade 2a in the pre-rotation process of the holder 2b, which causes the movable blade 2a to perform a shearing operation. The finger portion 2b' of the holder 2b hits the lower edge of the finger portion 2b' of the clamp 9, and is pushed downward in FIG. Immediately after the thread end of the foil system 3a' comes into contact with the upper edge of the clamp 9 by the holder finger 2b', it is finally cut by the subsequent rotation of the movable blade 2a in the clockwise direction in FIG. Holder 2b moving forward
By rotating clockwise in FIG. 8, the thread end of the foil thread 3a' at the part that contacts the lower edge of the holder finger part 2b' is pushed downward, corresponding to the contact part. The part is substantially the holder 2b
[Strictly speaking, the holder finger portion 2b'] is held between the back surface of the clamp 9 and the front surface of the clamp 9.

The point in time when the movable blade 2a is rotated in the clockwise direction in FIG. 8 to cut the foil thread 3a' end may be made to coincide with the time when the rapier thread gripper 19 releases its grip on the thread. When cutting the end of the foil thread 3a', presser foot 1
6 presses and restrains the foil thread 3a again.

After the rapier 1 has finished retracting, the delivery roller 6 continues to operate, thereby lowering the tension of the foil thread 3a after the roller 6, and lowering the weight plate 22 (provided that the weight plate 22 is present). The weight plate 22
When it descends to the point facing the sensor 23,
The sensor 23 detects this, and the delivery roller 6 is stopped based on it.

If the weight plate 22 is not provided, the delivery roller 6
may be driven and stopped as required by means similar to the foil yarn delivery roller in a conventional rapier (or gripper) loom.

Hereafter, in the same way, for each reciprocating movement of rapier 1,
One weft insertion of the foil yarn is performed, and the scissors 2 cut the foil yarn at a predetermined location, that is, at a location corresponding to the one weft insertion range. The weft-inserted foil yarn 3b is interwoven with the warp W on the loom...the selvedge protruding from the parallel body is interwoven with the warp splicing yarn 25... on the lower surface of the selvedge. 25' intersect, that is, the warp splint 2
The ear part rests on 5'. Due to the interweaving and crossing, the warp W of the weft-inserted foil yarn 3b...the vertical positioning of the portion protruding from the parallel body is ensured.

In the above foil thread insertion using rapier 1,
The foil yarn with the yarn end waiting at a predetermined location should be cut with scissors 2.
The position of the part slightly upstream is regulated in a fixed or fixed position by the thread path 15, and it is in a standby state where it maintains a constant posture, and in this state, it is gripped by the rapier 1 and inserts the weft, and during the weft insertion, The foil yarn is positioned in a fixed position relative to the shed in the front and back (up and down in FIG. 1) and vertical directions.

In addition, during the weft insertion, before the rapier 1 releases its grip on the weft insertion foil yarn and the scissors 2
The weft insertion detection sensor 20 is activated before the yarn end is cut, thereby detecting weft insertion.

On the other hand, when the foil yarn 3a is weft inserted in its normal direction, that is, facing up, the marks 4, 4 on the edges of the foil yarn 3b that have been inserted also occupy normal surfaces on the front and back sides, and the marks 4 , 4 are detected by the mark detection sensors 8, 8 while ensuring the above-mentioned vertical positioning of the ear portion. When the weft-inserted foil thread 3b is reversed, the marks 4, 4 on the edges of the weft-inserted foil thread 3b also do not face the reversed faces, in other words, the mark detection sensors 8, 8. Therefore, the mark detection sensors 8, 8 do not react.

The mark detection sensors 8, 8 detect or non-detect the marks 4, 4 on the weft inserting foil thread 3b, and in addition to the weft inserting detection at a predetermined time by the weft inserting detection sensor 20, the front side of the weft inserting foil thread 3b, Controls back detection. This detection of the front and back sides of the weft insertion foil threads is confirmed by activating alarms such as buzzers and lamps based on the non-operation (or activation) of the mark detection sensors 8 and 8 and the operation of the weft insertion detection sensor 20. All you have to do is
Further, if necessary, the foil yarn weft insertion system of the loom may be stopped by appropriate means when the front and back sides of the foil yarn are reversed and weft insertion occurs.

[Brief explanation of the drawing]

Fig. 1 is a plan view schematically showing an embodiment of the present invention, Fig. 2 is a front view showing the foil thread in a standby state together with a rapier in the same embodiment, and Fig. 3 is a weft inserting foil thread and mark detection sensor. A perspective view of the
FIG. 5 is an enlarged plan view of the tip of the rapier and the opening part of the rapier thread gripper in the same embodiment, and FIGS. 6 to 8 are movable blades of the scissors. FIG. 3 is an explanatory diagram showing the operating state of the machine in the order of steps. 1 is a rapier, 2 is a pair of scissors, 3 is a long roll of foil thread, 3a is a foil thread pulled out from the roll, 3a' is a foil thread with the end of the thread waiting at a predetermined location, and 3b is a foil thread. Weft-inserted foil yarn, 4 is a mark, 6 is a pinch feed roller, 8 is a mark detection sensor, 9 is a clamp, 15 is a yarn path, 18 is a rapier foil yarn grip release hit, 20 is a weft insertion detection sensor, 25, 25'
is a warp thread.

Claims (1)

[Claims] 1. A long roll of foil yarn is placed in a fixed position, and the end of the foil yarn pulled out from the roll is placed in a predetermined position,
The yarn end of the foil yarn is gripped by a rapier or a gripper shuttle and the grip is released when the rapier or gripper shuttle reaches a fixed position during the weft insertion movement, and the inserted foil yarn is inserted into the foil yarn. A foil yarn weft inserting device for a loom, in which cutting is performed using mechanical force-driven scissors located at a location corresponding to the waiting yarn end of the loom; A mark is made on the front or back side of the area corresponding to the selvage of the fabric, and a thread path for the foil thread is provided at a location slightly upstream of the standby foil thread from the scissors, and the rapier or gritspa shuttle is equipped with a thread path for the foil thread. When weft insertion is performed, a sensor for detecting the mark on the foil yarn under the weft insertion is placed at a location corresponding to the mark, and before the rapier or grip shuttle releases its grip on the weft insertion foil yarn. The loom is equipped with a weft insertion detection sensor that operates to detect weft insertion before the scissors cut the foil yarn, and the mark detection sensor detects the weft insertion by detecting or not detecting the mark. What is claimed is: 1. A foil yarn weft insertion device for a loom, characterized in that it is responsible for detecting the front and back sides of weft insertion foil yarns as well as for weft insertion detection. 2. Arranging a long roll of foil yarn in a fixed position, letting the yarn end of the foil yarn pulled out from this stand by at a predetermined location, gripping the yarn end of the foil yarn with a rapier or gripper shuttle, and inserting the weft, The grip is released when the rapier or gripper shuttle reaches a fixed position during the weft insertion movement, and the inserted foil yarn is held by a mechanically driven type machine located at a location corresponding to the waiting yarn end of the foil yarn. In a foil thread weft inserting device for a loom that uses scissors to cut the foil thread, the foil thread is cut on the front or back side of the portion corresponding to the left and right edges of the fabric in each weft inserting range. A mark is provided and a thread path for the foil yarn is provided at a location slightly upstream of the standby foil yarn from the scissors, and when weft insertion is performed using the rapier or grip shuttle, the foil yarn under the weft insertion is Sensors for detecting marks on both the left and right ears are placed at locations corresponding to the respective marks, and the sensor is placed before the rapier or gripper shuttle releases its grip on the weft-inserted foil yarn and before the scissors cut the foil yarn. The loom is equipped with a weft insertion detection sensor that operates at a previous point in time to detect weft insertion. A foil yarn weft insertion device for a loom, characterized in that it is responsible for detecting the front and back sides of foil yarn on both the left and right sides. 3 Place the long roll of foil yarn in a fixed position, let the end of the foil yarn pulled out from this stand by in a predetermined position,
The yarn end of the foil yarn is gripped by a rapier or a gripper shuttle and the grip is released when the rapier or gripper shuttle reaches a fixed position during the weft insertion movement, and the inserted foil yarn is inserted into the foil yarn. A foil yarn weft inserting device for a loom, in which cutting is performed using mechanical force-driven scissors located at a location corresponding to the waiting yarn end of the loom; A mark is made on the front or back side of the area corresponding to the selvage of the fabric, and a thread path for the foil thread is provided at a location slightly upstream of the standby foil thread from the scissors, and the rapier or gritspa shuttle is equipped with a thread path for the foil thread. When weft insertion is performed, a sensor for detecting the mark on the foil yarn under the weft insertion is placed at a location corresponding to the mark, and before the rapier or grip shuttle releases its grip on the weft insertion foil yarn. The above-mentioned loom is equipped with a weft insertion detection sensor that operates to detect weft insertion before the scissors cut the foil yarn, and the weft insertion detection sensor operates to detect weft insertion before the scissors cut the foil yarn. A warp splicing yarn that intersects with is provided on the loom, and the mark detection sensor detects the front and back sides of the weft-inserted foil yarn by detecting and non-detecting the mark, in addition to the weft-insertion detection of the weft-insertion sensor. A foil yarn inserting device for a loom, which is characterized by being a device for inserting foil yarn into a loom.