JPH11158757A - Weft control for multicolor weft inserting loom and control unit therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct efficient weft control for a multicolor weft inserting loom of simplified structure so as to improve operating efficiency and operability through bending wefts traveling through weft inserting nozzles on the upstream side of the nozzles. SOLUTION: In controlling wefts 16a, 16b in a multicolor weft inserting loom including a multicolor weft inserting device 14 having one or more weft inserting means each equipped with a plurality of weft inserting nozzles 20a, 20b movable to the respective weft inserting positions, the weft inserting nozzles 20a, 20b lying at the respective weft inserting positions are moved to other positions to bend the wefts 16a, 16b traveling through the corresponding weft inserting nozzles 20a, 20b on the upstream side of the weft inserting nozzles 20a, 20b; wherein it is preferable that the weft inserting nozzles 20a, 20b are moved in the lateral stage of the weft inserting period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft control method and apparatus for a multicolor weft weaving loom having a plurality of weft inserting nozzles movable to a weft inserting position.

[0002]

2. Description of the Related Art In a fluid jet loom such as an air jet loom or a water jet loom, a weft is used for the purpose of braking, pulling back a weft, applying tension to a weft, and relaxing the tension of a weft. The so-called weft control for controlling the weft on the upstream side of the input nozzle is performed. Such weft control is mainly performed by bending the weft on the upstream side of the weft insertion nozzle.

As a technique for controlling the weft as described above, there are techniques described in JP-A-6-212536, JP-A-60-17150, and JP-A-8-325895. In these techniques, an engaging member that engages with a weft is provided between a locking means such as a clamper and a locking pin and a weft insertion nozzle, and the engaging member is driven by a dedicated drive such as an actuator or a cam. The weft is bent by displacing by means.

[0004] The engagement member and the driving means as described above are provided for each weft insertion nozzle. For this reason, in a multicolor weft insertion loom having a plurality of weft insertion nozzles, a plurality of engagement members and driving means must be provided corresponding to the number of weft insertion nozzles. For this reason, the configuration around the weft insertion device becomes very complicated, and the weft insertion device and thus the loom become very expensive. In particular, if an actuator is used as the driving means, the control means must also be provided, so that the configuration becomes more complicated and more expensive.

[0005]

Therefore, it is desired to realize a weft control in a multicolor weft weaving loom with a simple configuration.

[0006]

A weft control method according to the present invention comprises:
This is performed in a multicolor weft insertion loom including a multicolor weft insertion device having one or more weft insertion means each having a plurality of weft insertion nozzles movable to a weft insertion position.

A weft control device according to the present invention includes a multicolor weft insertion device having at least one weft insertion means having a plurality of weft insertion nozzles respectively movable to a weft insertion position, and provided in correspondence with the weft insertion nozzle. A plurality of weft locking means disposed between the corresponding weft insertion nozzle and the storage device; and a plurality of weft locking means disposed between the weft locking means and the weft insertion nozzle to regulate the path of the weft yarn therebetween. A guide member.

[0008] The method of controlling the weft includes moving the weft insertion nozzle at the weft insertion position from the weft insertion position to another position, and bending the weft passing through the weft insertion nozzle upstream of the weft insertion nozzle. .

[0009] The method of controlling the weft is also characterized in that the weft insertion is performed by one weft insertion nozzle of one weft insertion means and the next weft insertion is performed by another weft insertion means. Moving the weft from the weft insertion position to another position and bending the weft passing through the one weft insertion nozzle upstream of the one weft insertion nozzle.

The method of controlling a weft further includes moving the weft insertion nozzle from the weft insertion position to another position in a case where the weft insertion is not switched, and changing the weft passing through the weft insertion nozzle. After bending the nozzle on the upstream side of the weft insertion nozzle, returning the weft insertion nozzle to the weft insertion position before starting the next weft insertion is included.

[0011] The weft insertion nozzle can be moved later in the weft insertion period.

Each weft insertion means of the multicolor weft insertion device is generally
A nozzle moving mechanism that drives the selected weft insertion nozzle to the weft insertion position and moves the weft insertion nozzle at the weft insertion position from the weft insertion position to another position with the switching of the weft inserted. It has a mechanism.

Therefore, the weft can be bent by utilizing such a nozzle moving mechanism to positively move the weft insertion nozzle from the weft insertion position to another position at a predetermined timing. As a result, the weft passing through the weft insertion nozzle is bent upstream of the weft insertion nozzle, and is subjected to braking, pulling back, application of tension, relaxation of tension, and the like.

As described above, when the weft insertion nozzle at the weft insertion position is positively displaced from the weft insertion position to another position by the weft switching nozzle moving mechanism, the weft extending through the weft insertion nozzle is displaced. Despite being able to bend on the upstream side of the weft insertion nozzle, the driving means for the locking member, which is conventionally required, is not required, and the configuration is simplified and the cost is reduced.

Further, when a guide member for regulating the path of the weft between the weft engaging means and the weft inserting nozzle is provided between the weft engaging means and the weft inserting nozzle, the weft is reliably bent,
A predetermined amount of bending can be obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 4, a multicolor weft control device 10 is used in a multicolor weft weaving machine that uses a pressurized fluid such as water or air for wefting.
(See FIG. 2). In the illustrated example, the weft control device 10 is used in a water jet loom. However, the present invention can also be applied to a yarn control device for an air jet loom.

The weft control device 10 includes a multicolor weft insertion device 14 supported on a frame 12. In the illustrated example, the weft insertion device 14 is a two-color weft insertion device having one weft insertion device.

The weft insertion device 14 includes wefts 16a and 16b.
And one weft insertion means provided with two weft insertion nozzles 20a and 20b that are selectively moved to a weft insertion position for inserting weft into the opening of the warp 18 and another position, respectively. The weft insertion nozzles 20a and 20b are moved by a common nozzle moving mechanism as described later.

The weft insertion device 14 includes weft yarns 16a and 16b.
Nozzles 20 for ejecting pressure and pressure fluid, respectively.
a and 20b, a swing shaft 22 supported on the frame 12 so as to be capable of angular reciprocating rotational movement (oscillating movement or pivotal movement) about an axis extending in the horizontal direction, and assembled to the swing shaft 22. Swing arms 24a and 24b.
In FIG. 1, for ease of understanding, weft insertion nozzle 2
0a is shown at a position different from the actual position.

The oscillating shaft 22 includes a pair of bearings 26a, 26
By b, it is received by the frame of the loom in a state of extending parallel to each other. In the illustrated example, as shown in FIG. 3, the rotation axis of the swing shaft 22 is the warp line 2 as shown in FIG.
8, but may be a place other than on the warp line 28.

The swing arms 24a and 24b are respectively connected to split screws 32 through bearings 30a and 30b.
a and 32b are attached to the swinging shaft 22 so as to be relatively non-rotatable.
4 is pressed against one bearing portion 26b. Bearing 3
Each of Oa and 30b can be formed by a convex spherical fitting member and a concave spherical bush.

The oscillating arms 24a and 24b move the oscillating shaft 2 such that the weft insertion nozzles 20a and 20b are spaced at a predetermined angular interval around a common pivot axis (the rotation axis of the oscillating shaft 22).
2 is held. The bearing portions 26a and 26b include a cylindrical bracket attached to the frame 12, a bearing that is immovably disposed at one end of the bracket and rotatably receives a corresponding swing shaft, and a bearing at the other end in the bracket. And a nipple inserted from the side.

The bearings 26a and 26b, the swing shaft 22 and the swing arms 24a and 24b
A flow path for supplying a pressure fluid to a and 20b is formed. Pipe 36 extending from a pressure fluid supply device (not shown)
a and 36b are connected to nipples of the corresponding bearing portions 26a and 26b by nuts 38a and 38b, respectively.

The weft insertion device 14 also includes a nozzle moving mechanism, ie, a drive mechanism 40 for rotating the swing shaft 22 angularly to move the weft insertion nozzles 20a, 20b between the weft insertion position and another position.

The drive mechanism 40 includes a drive source 42, which is a rotary electric actuator such as a servomotor, a crank 46 connected to an output shaft 42a of the drive source by a split screw 44, and one end at an eccentric portion of the crank. A link 50 pivotally connected to the other end of the link by a suitable connecting member 48 such as a pivot, and a swinging lever pivotally connected to the other end of the link by a suitable connecting member 52 such as a pivot. 54. The swing lever 54 is connected to the swing shaft 22 by a split screw 56. FIG. 1 omits some of these members.

When the connecting point between the crank 46 and the link 50 reaches the top dead center or the bottom dead center, the swing lever 54 moves relative to the swing shaft 22 so that the weft insertion nozzle reaches a predetermined weft insertion position. It is mounted so that it cannot rotate.

Therefore, when the output shaft 42a of the drive source 42 is rotated by one half in one direction, the swing lever 54 and the swing shaft 22 are rotated.
Then, the swing arms 24a and 24b are rotated by a predetermined angle in one direction, and one weft insertion nozzle is moved to a common weft insertion position, and the other weft insertion nozzle is moved from the weft insertion position to another position.

When the output shaft 42a of the driving source 42 is further rotated by 1/2 in the same direction, the swing lever 54, the swing shaft 22, and the swing arms 24a and 24b are rotated by a predetermined angle in the opposite directions. The switching of the weft insertion nozzle is performed.

The output shaft of the drive source 42 can be controlled not only in one direction but also in such a manner that the rotation angle of the output shaft 42a is reduced so that the output shaft 42a repeats normal rotation and reverse rotation. Good.

FIGS. 1 to 4 show a state in which the weft insertion nozzle 20b has been moved to the common weft insertion position, and the weft insertion nozzle 20a has been moved from the common weft insertion position to another position. The single weft insertion position shared by the weft insertion nozzles 20a and 20b is the position of the weft insertion nozzle 20b indicated by a solid line in the figure.

FIGS. 3 and 4 show the position of the weft insertion nozzle 20b by a dotted line when the weft insertion nozzle 20a is moved to the common weft insertion position, and the weft insertion nozzle 20b is moved to the common weft insertion position. The position of the weft insertion nozzle 20a at the time is shown by a solid line.

When the weft insertion nozzle 20b is at the weft insertion position, the weft insertion nozzle used for weft insertion is changed from 20b to 20.
a, the swing shaft 22 and the swing arm 24
a and 24b are rotated by a predetermined angle by the drive mechanism 40.
Thereby, the weft insertion nozzle 20a is moved to the weft insertion position, and the weft insertion nozzle 20b is moved from the weft insertion position to another position.

In the above state, when the weft insertion nozzle 20b is used again for weft insertion, the swing shaft 22 and the swing arm 2
4a and 24b are reversed by a predetermined angle by the drive mechanism 40. Thereby, the weft insertion nozzle 20b is moved to the weft insertion position, and the weft insertion nozzle 20a is moved from the weft insertion position to another position.

As described above, the weft insertion nozzle used for weft insertion is switched by the rotation of the output shaft 42a of the drive source 42 and is appropriately selected. When bending the weft yarn 16a or 16b, the output shaft 42a of the drive source 42 is rotated by a predetermined angle, so that the weft insertion nozzle 20a or 20b at the weft insertion position is moved from the weft insertion position to another position.

The weft control device 10 further includes a clamper 60 disposed upstream of the weft insertion device 14. The clamper 60 includes the weft insertion nozzles 20a, 20b and the wefts 16a,
It is supported by the frame 12 between a pair of storage devices (not shown) for measuring the length of the weft 16b and storing the weft. The clamper 60 includes three pushers 62, 64, and 66 that are sequentially arranged coaxially on the frame 12. First and third pushers 62 and 66 are spaced with a second pusher 64 therebetween.

The opposite ends of the first and second members 62 and 64 are relatively moved toward and away from each other to clamp and release the weft yarn 16a.
Acts as a weft locking portion. Similarly, the opposite ends of the second and third members 64 and 66 are relatively moved toward and away from each other to clamp and release the weft 16b. Act as

On the upstream and downstream sides of the first and second weft engaging portions, fixed yarn guides 68a, 68b and 70a for guiding the wefts 16b and 16b to the corresponding weft engaging portions of the clamper 60, respectively. And 70b are arranged. These yarn guides are immovably attached to the frame 12.

Fixed guides 72a and 72b are arranged between the yarn guides 70a and 70b and the weft insertion nozzles 20a and 20b, respectively. Fixed guide 72a
And 72b are yarn guides 70a and 70b, respectively.
It is attached to the frame 12 so as to regulate the paths of the wefts 16a and 16b extending from the frame 12b.

The wefts 16a and 16b are respectively connected to the yarn guides 70a and 70b and the weft insertion nozzles 20a and 20b.
b, the position with respect to the weft insertion position is regulated by the fixed guides 72a and 72b.

FIG. 5 is a diagram for explaining weft control by the weft control device 10. As shown in FIG.

In FIG. 5, (A) shows the rotation angle of the main shaft of the loom, and (B) shows the swing shaft when the weft control device 10 is used as a braking device and the selection of the weft inserted is not performed. (C) is a oscillating curve of the oscillating shaft 22 when the weft control device 10 is used as a braking device, and the oscillating shaft 22 performs a selective switching of the weft to be inserted. (D) is a weft control device. 10 is used as a weft pull-back device, a swing curve of the swing shaft 22 in a case where selection switching of the weft inserted into the weft is not performed, and
(E) shows the oscillating curve of the oscillating shaft 22 when the weft control device 10 is used as a weft pull-back device and when the selection of the weft to be inserted is switched.

In FIG. 5, θ1 is the weft insertion nozzle 2
0a is the swing angle of the swing shaft 22 with respect to an arbitrary origin at the weft insertion position, and θ2 is the swing angle of the swing shaft 22 with respect to the arbitrary origin when the weft insertion nozzle 20b is at the weft insertion position. It is.

As shown in FIG. 5B, the weft control device 1
In the case where 0 is used as a braking device and the switching of the weft used for weft insertion is not performed, the swing shaft 22 is rotated from the angle θ1 to θ2 in the later stage (about 210 degrees) of the weft insertion period. , The weft insertion nozzle 2 at the weft insertion position
0a is moved from the weft insertion position. Next, the swing shaft 22
Is rotated from the angle .theta.2 to the angle .theta.1, so that the weft insertion nozzle 20a is returned to the weft insertion position again.

The weft thread 18a is mainly used when the swing shaft 22 is rotated from the angle θ1 to the angle θ2.
And is subjected to braking. The swing shaft 22 has an angle θ
When rotated from 1 to θ2 and then from angle θ2 to θ1, the weft insertion nozzle 20b is moved to the weft insertion position and then moved again from the weft insertion position.

As shown in FIG. 5C, the weft control device 1
When the weft 0 is used as a braking device, when the selection of the weft used for weft insertion is performed, the swing shaft 22 is moved from the angle θ1 to the angle θ2 from the latter half (about 210 degrees) of the weft insertion period to the end of the weft insertion period. By being rotated to
The weft insertion nozzle 20a at the weft insertion position is moved from the weft insertion position, and the weft insertion nozzle 20b is moved to the weft insertion position.
As a result, the weft 18a is bent by the weft insertion nozzle 20a and subjected to braking, and the weft used for the next weft insertion is switched.

As shown in FIG. 5D, the weft control device 1
0 is used as the weft pull-back device, and when the weft used for weft insertion is not switched, the swing shaft 2
2 is rotated from the angle .theta.1 to the angle .theta.2 from after the cutting of the weft 16a to before the start of the next weft insertion (about 10 to 90 degrees), so that the weft insertion nozzle 20a at the weft insertion position causes the weft insertion nozzle 20a to rotate. Moved from position. Next, by rotating the swing shaft 22 from the angle θ2 to θ1, the weft insertion nozzle 20 is rotated.
a is returned to the weft insertion position again. Thereby, the weft 16
a is bent by the weft insertion nozzle 20a and pulled back at the tip end side.

As shown in FIG. 5E, the weft control device 1
When the weft pull-back device is used, when the weft to be used for weft insertion is switched, the swing shaft 22 is moved from after the cutting of the weft 16a to before the start of the next weft insertion (about 1).
By rotating from the angle θ1 to the angle θ2 (between 0 ° and 90 °), the weft insertion nozzle 20a at the weft insertion position is moved from the weft insertion position, and the weft insertion nozzle 20b is moved to the weft insertion position. As a result, the weft yarn 16a is inserted into the weft insertion nozzle 20a.
And the tip side is pulled back, and the weft insertion nozzle used for the next weft insertion is switched.

When the weft insertion nozzle 20b is at the weft insertion position, except that the swing shaft 22 is rotated in the opposite direction,
The same weft control as described above is performed. Further, the weft control for bending the weft at the upstream side of the weft insertion nozzle as described above is performed every time the weft is inserted.

According to the weft control device 10 described above, the weft 1
The positions of the weft insertion nozzles 20a and 16b are controlled by the fixed guides 72a and 72b.
And 20b are bent from the weft insertion position while being locked to the corresponding fixed guides 72a and 72b, and as a result, the predetermined required amount is reliably bent.

Referring to FIGS. 6 and 7, the multicolor weft insertion device 14 of the weft control device 80 is also a two-color weft insertion device having one weft insertion means.

The weft control device 80 includes two sets of two fixed guides 82a, 82b, 84a, 84b at intervals in the running direction of the weft between the yarn guides 70a, 70b and the weft insertion nozzles 20a, 20b. Arranged, weft insertion nozzle 20a
And 20b are attached with stays 86a and 86b so as to be relatively immovable, and swing guides 88a and 88b are attached to stays 86a and 86b, respectively.

The wefts 16a and 16b are guided by guides 82a,
84a, 88a and 82b, 84b, 88b to the corresponding weft insertion nozzles 20a, 20b. Swing guide 8
8a and 88b are the weft insertion nozzles 20a and 2b, respectively.
When 0b is at the weft insertion position, the fixed guides 82a, 84
a and between 82b and 84b. The swing guides 88a and 88b are moved to a position between the corresponding fixed guides and another position by the stays 86a and 86b swinging with the swing of the weft insertion nozzles 20a and 20b, respectively. .

In the weft control device 80, the weft insertion nozzle 2
0b has been moved to the weft insertion position indicated by the solid line in FIG. 7, the swing guide 88b becomes the corresponding fixed guide 82b, 8
4b, and the swing guide 88a is moved to the position shown in FIG.
The weft insertion nozzle 20a has been moved to the position shown by the solid line in FIG.

When the weft insertion nozzle 20b is moved to the weft insertion position shown by the dotted line in FIG. 7, the swing guide 88b is moved to the position shown by the solid line in FIG.
a is between the corresponding fixed guides 82a and 84a, and the weft insertion nozzle 20a is moved to the weft insertion position.

As a result, according to the weft controller 80,
Weft yarns 16a and 16b are inserted into weft insertion nozzles 20a and 20b.
Is not only bent while being locked to the fixed guides 84a and 84b, but also fixed guides 82a, 84a with the movement of the swing guides 88a, 88b.
And 82b, 84b. For this reason, the wefts 16a and 16b are bent more reliably than a predetermined required amount.

In the above description, the weft control technique in the two-color weft insertion has been described. However, the present invention can be applied to the weft control in the multi-color weft insertion of three or more colors.

In the case of weft control of three or more colors, the movement amount of the weft insertion nozzle at the weft insertion position greatly changes depending on the selection order due to an increase in the number of weft insertion nozzles. In such a case, it is preferable to separately perform the operation for controlling the weft and the operation for moving to the weft insertion position.

The movement amount of the weft insertion nozzle for weft control is not limited to the movement amount required for switching the weft insertion nozzle used for weft insertion as in the above embodiment, but may be an arbitrary movement amount. be able to. Also in this case, it is preferable that the weft insertion nozzle selected before the start of the next weft insertion is moved again so that it is at the weft insertion position.

FIG. 8 shows four weft insertion nozzles 20a, 20
The relationship between each weft insertion nozzle and the weft insertion position in a four-color weft insertion device having one weft insertion means having b, 20c, and 20d is shown. Weft insertion nozzles 20a, 20b, 20c, 20
d is attached to a common swing shaft, and is moved to a common weft insertion position and another position by swinging the swing shaft by a common nozzle moving mechanism, that is, a drive mechanism. In FIG. 8, the common weft insertion position is the current position of the weft insertion nozzle 20b.

FIG. 9 is a diagram for explaining weft control for braking in the embodiment shown in FIG.

In FIG. 9, (A) shows the rotation angle of the main shaft of the loom, and (B) shows the swing curve of the swing shaft when the weft insertion nozzle used for weft insertion is switched from the weft insertion nozzle 20a to the weft insertion nozzle 20d. (C) shows a swing curve of the swing axis when the weft insertion nozzle used for weft insertion is switched from the weft insertion nozzle 20a to the weft insertion nozzle 20b.

In FIG. 9, θ1, θ2, θ3 and θ4 are the weft insertion nozzles 20a, 20b and 20 respectively.
The swing angles of the swing shaft 22 with respect to an arbitrary origin when c and 20d are at the weft insertion position.

As shown in FIG. 9 (B), when braking the weft 16a corresponding to the weft insertion nozzle 20a at the weft insertion position, the swing shaft 22 is moved from the angle θ1 to θ2 in the latter half of the weft insertion period. Is rotated, and then the swing shaft 22 is moved from the angle θ2 to θ.
Rotated to 1. Thereby, the weft insertion nozzle 20a at the weft insertion position is moved from the weft insertion position and then returned to the weft insertion position.

When the weft 16a corresponding to the weft insertion nozzle 20a at the weft insertion position is braked and the weft insertion nozzle used for weft insertion is switched from 20a to 20d, the swing shaft 22
Is rotated from the angle .theta.1 to .theta.2 in the latter half of the weft insertion period, and then the oscillating shaft 22 is rotated from the angle .theta.2 to .theta.4 after the cutting of the weft 16a and before the start of the next weft insertion. Is moved from the weft insertion position, and the weft insertion nozzle 20b is moved to the weft insertion position. As a result, the weft yarn 16a is bent by the weft insertion nozzle 20a, and the weft insertion nozzle used for the next weft insertion is switched.

As shown in FIG. 9 (C), the weft 16a corresponding to the weft insertion nozzle 20a at the weft insertion position is braked, and the weft insertion nozzle used for weft insertion is inserted from the weft insertion nozzle 20a to the next weft insertion nozzle. When switching to the nozzle 20b, the swinging shaft 22 is rotated from the angle θ1 to θ2 from the latter half of the weft insertion period to the end of the weft insertion period, so that the weft insertion nozzle 20a at the weft insertion position moves from the weft insertion position. And
The weft insertion nozzle 20b is moved to the weft insertion position. As a result, the weft yarn 16a is bent by the weft insertion nozzle 20a, and the weft insertion nozzle used for the next weft insertion is switched.

The start and end timings of the weft insertion control can be arbitrarily set based on the type of the weft inserted, the weft insertion conditions (for example, the timing of the start and the end of the weft insertion). it can. In FIGS. 5B and 5D, the movement of the weft insertion nozzle to the weft insertion position is started immediately after the movement of the weft insertion nozzle from the weft insertion position is completed. The movement for returning to the weft insertion position can be performed at an appropriate timing as long as the weft insertion nozzle completes the movement to the weft insertion position by the start of the next weft insertion.

Although each of the above embodiments relates to a multicolor weft insertion device having one weft insertion means, the present invention relates to a multicolor weft insertion device.
Multicolor weft insertion device having one or more weft insertion means having one weft insertion nozzle and one or more weft insertion means having two or more weft insertion nozzles, a plurality of weft insertion means each having a plurality of weft insertion nozzles Such as a multicolor weft insertion device with
The present invention can also be applied to a weft control method and device in a multicolor weft insertion device having a plurality of weft insertion means having the above-described weft insertion nozzle.

Referring to FIGS. 10 to 12, the multicolor weft control device 90 differs from the weft control devices 10 and 80 in that the weft insertion device 14 includes first and second weft insertion means. The first and second weft insertion means have the same structure as the weft insertion means shown in FIGS. 1 to 4 and are arranged symmetrically. 10 to 12, FIG.
The same members as those shown in FIG. 4 are denoted by the same arithmetic numerals as symbols, and symbols such as A, B, a, b, c, d are added after the arithmetic numerals.

The first weft insertion means has weft insertion nozzles 20a and 20b, and the second weft insertion means has weft insertion nozzles 20c and 20d. The weft insertion nozzles 20a and 20b are driven by a nozzle moving mechanism, that is, a driving mechanism 40A, and the weft insertion nozzles 20c and 20d are driven by a nozzle moving mechanism, that is, a driving mechanism 40B.

The swing lever 9 of the first and second weft insertion means
2a, 92b and swing levers 92c, 92d are attached to the corresponding swing shafts 22A and 22B, respectively, and swing together with the corresponding swing arms 24a, 24b and 24c, 24d by the corresponding drive mechanisms 40A and 40B. Be moved. The swing levers 92a, 92b, 92c and 92d have first and second guide holes for the weft. The first guide holes are denoted by reference numerals 96a, 96b,
Shown at 96c and 96d.

The wefts 16a, 16b, 16c and 16d
Is a clamper 60 that grips the weft so that it can be unwound.
a, 60b, 60c and 60d, swing levers 92a, 9
First guide holes 96a, 96 of 2b, 92c and 92d
b, 96c and 96d, fixed yarn guides 94a, 94
4b, 94c and 94d, swing levers 92a and 92b,
It extends through second guide holes 92c and 92d (not shown) and weft insertion nozzles 20a, 20b, 20c and 20d.

In the illustrated example, as shown in FIG. 12, the rotation axes 98A and 98B of the oscillating shafts 22A and 22B are spaced apart on the warp line 28. However, the rotation axes 98A and 98B may be located other than on the warp line 28. The weft insertion position is on the warp line 28 in any of the weft insertion means.

The weft insertion nozzles 20a and 20b are driven by the drive mechanism 40A so that one of them is at the weft insertion position and the other is at the other position.
And 92b together with the yarn guides 94a and 94b and the swing levers 92a and 92b to bend the weft yarns 16a and 16b.

Similarly, the weft insertion nozzles 20c and 20d are
The drive mechanism 40B simultaneously moves the swing guides 92c and 92d together with the swing levers 92c and 92d so that one of them is at the weft insertion position and the other is at the other position.
In cooperation with b, the wefts 16c and 16d are bent.

Next, an embodiment of a weft control method by the weft control device 90 will be described with reference to FIGS. 13 to 16 show an example in which the weft control device 90 functions as a weft pullback device.

13 to 16, the weft insertion nozzles 22b, 22a, 22c and 22d are respectively
As shown in FIG. 12, the nozzle numbers are 1, 2, 3, and 4, and the circle of the nozzle number of the weft insertion nozzle that has been moved to the weft insertion position protrudes from the weft insertion nozzle tip after weft insertion. The length of the weft protrusion amount is indicated by long (long) and short (short) symbols.

The weft insertion selection pattern is a pattern for selecting a weft insertion nozzle (hence, a weft). Also, for example, weft insertion selection pattern 1 → 2 → 3 → 4
This means that nozzles used for weft insertion are repeatedly selected in the order of 1, 2, 3, 4, 1, 2,....

13 to 16, (a) shows a conventional control method, and (b) shows a control method according to the present invention. 13, 14, 15 and 16 respectively
The weft-insertion selection pattern repeats 1, 2, 3, 4
・ 3 ・ 2 ・ 4 repeat 、 1 ・ 4 ・ 2 ・ 3 repeat,
This is an example in the case of repetition of 1, 1, 2, 2, 3, 3, 4, 4.

As is apparent from FIGS. 13 to 16, when the weft insertion nozzle used for the next weft insertion belongs to a different weft insertion means, the switching of the weft insertion nozzle of the weft insertion means used for the previous weft insertion is performed. The movement is not performed conventionally, but is performed in the present invention.

For example, in FIG. 13, when the weft insertion pattern is switched from 2 to 3, after the weft insertion and cutting of the weft by the nozzle 2, the nozzle 3 to be used for the next weft insertion is selected. At this time, on the side of the second weft insertion means provided with the nozzles 3 and 4, switching of the weft insertion nozzle from the nozzle 4 to the nozzle 3 is performed.

However, conventionally, the first weft insertion means provided with the weft insertion nozzles of the nozzles 1 and 2 does not switch the weft insertion nozzle from the nozzle 2 to the nozzle 1. As a result, in the related art, since the pull-back by the nozzle 2 is not performed, the weaving proceeds with the weft projection length from the tip of the nozzle 2 being long.

As described above, conventionally, one of the lengths of the weft projecting from the tip of the weft insertion nozzle adjacent to the warp line is always long. As a result, in a multicolor weft insertion device in which a plurality of weft insertion nozzles are adjacent in the vicinity of the warp line, the weft portions protruding from the tips of the adjacent weft insertion nozzles may be entangled with each other, obstructing the weft insertion.

On the other hand, in the present invention, the nozzle 2
During or after weft insertion, the nozzle 2 is moved from the weft insertion position to another position on the side of the first weft insertion means, that is, switching of the weft insertion nozzle from the nozzle 2 to the nozzle 1 is performed.

As a result, according to the present invention, the weft is pulled back also in the nozzle 2, the length of the weft projecting from the tip of the nozzle 2 is shortened, and stable weft insertion is performed. When the first and second weft insertion means are alternately selected as in the embodiment of FIGS. 14 and 15, the movement of the weft insertion nozzle is selected next to the weft insertion means to which the nozzle belongs. , The moving time of the nozzle can be set long, and as a result, the load on the speed of the drive motor can be reduced, and the size and speed of the drive motor can be reduced.

FIGS. 13 to 16 are based on the assumption that the selected weft insertion nozzle is switched by each weft insertion means. For this reason,
In the case of the weft insertion selection pattern in which the same weft insertion nozzle is continuously selected as in the example shown in FIG. 16, a state in which the weft is not pulled back and the weft projection length remains long exists in some weft insertions. Will be. Even in such a case, according to the present invention, the case where both of the weft protrusion lengths are shorter is more than before.

When weft insertion is performed a plurality of times continuously by the same weft insertion nozzle as in the weft insertion selection pattern shown in FIG.
For each subsequent weft insertion other than the last, the weft insertion nozzle is moved from the weft insertion position to another position for pulling back the weft, and then the weft insertion nozzle may be returned to the weft insertion position by the start of the next next weft insertion. .

In other words, when the weft to be inserted is not switched, the weft insertion nozzle is moved from the weft insertion position to another position, and then the weft insertion nozzle is moved again before the next weft insertion starts. All you have to do is return to the weft insertion position. As a result, the weft is pulled back each time the weft is inserted, so that the length of the weft projecting from the nozzle tip is reduced.

The weft insertion nozzle may be moved from the weft insertion position to another position each time weft insertion, regardless of whether or not the weft insertion is switched. Thus, regardless of whether or not the weft inserted into the weft is switched, if the weft insertion nozzle is positively moved from the weft insertion position to another position, the weft extending through the weft insertion nozzle each time weft insertion is performed. Can be bent upstream of the weft insertion nozzle to pull back the weft.

In each of the above embodiments, the motion of the drive source is transmitted to the swing arm using the crank mechanism.
A cam mechanism may be used instead of the crank mechanism. In each of the above embodiments, the weft insertion nozzle is moved by swinging. However, the weft insertion nozzle may be moved linearly instead. In this case, a mechanism using a rack and a pinion, a linear motor, a solenoid mechanism, or the like may be used as the drive source.

The present invention can be applied not only to the weft braking technique and the weft pull-back technique but also to other weft bending techniques such as a tension applying technique and a tension relaxing technique by setting the timing of the movement of the weft insertion nozzle to an appropriate timing. The present invention can also be applied to a weft bending technique that executes these multiple techniques.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a multicolor weft control device of the present invention, with some members omitted.

FIG. 2 is a side view of the weft insertion device in the multicolor weft control device shown in FIG. 1, with some members omitted.

FIG. 3 is a view for explaining the movement of a weft insertion nozzle with respect to a weft insertion position in the multicolor weft control device of FIG. 1;

FIG. 4 is a diagram for explaining a positional relationship between a weft insertion position and a weft insertion nozzle in the multicolor weft control device of FIG. 1;

FIG. 5 is a view for explaining a method of weft control by the multicolor weft control device of FIG. 1;

FIG. 6 is a plan view showing another embodiment of the multicolor weft control device.

FIG. 7 is a view for explaining a positional relationship between a weft insertion position and various members in the multicolor weft control device of FIG. 6;

FIG. 8 is a diagram for explaining the movement of a weft insertion nozzle with respect to a weft insertion position in still another embodiment of the multicolor weft control device.

9 is a diagram for explaining a method of weft control by the multicolor weft control device of FIG.

FIG. 10 is a plan view showing another embodiment of the multicolor weft control device according to the present invention, in which some members are omitted.

FIG. 11 is a front view of the multicolor weft insertion device shown in FIG. 10 with some members omitted.

FIG. 12 is a view showing one embodiment of a positional relationship between a weft insertion nozzle and an opening.

13A and 13B are diagrams showing a positional relationship of a weft insertion nozzle with respect to a weft insertion position and a result of a weft protrusion length from the nozzle in the first embodiment of the weft insertion selection pattern, wherein FIG. (B) shows the relationship and result according to the present invention.

14A and 14B are diagrams showing a positional relationship between a weft insertion nozzle and a weft insertion position and a weft protrusion length from the nozzle in a second embodiment of the weft insertion selection pattern, wherein FIG. (B) shows the relationship and result according to the present invention.

15A and 15B are diagrams showing a positional relationship between a weft insertion nozzle and a weft insertion position with respect to a weft insertion position in a third embodiment of a weft insertion selection pattern, and a result of a weft protrusion length from the nozzle; FIG. (B) shows the relationship and result according to the present invention.

16A and 16B are diagrams showing a positional relationship of a weft insertion nozzle with respect to a weft insertion position and a result of a weft protrusion length from the nozzle in a fourth embodiment of the weft insertion selection pattern, wherein FIG. (B) shows the relationship and result according to the present invention.

[Explanation of symbols]

10, 80, 90 Multicolor weft control device 12 Loom frame 14 Weft insertion device 16a, 16b, 16c, 16d Weft 18 Warp 20a to 20d Weft insertion nozzle (weft insertion means) 22, 22A, 22B Swing shafts 24a, 24b , 24c, 24d Swing arm 26a, 26b, 26c, 26d Bearing part 28 Warp line 40, 40A, 40B Driving mechanism (nozzle moving mechanism) 42 Driving source 60, 60a, 60b, 60c, 60d Clamper 68a, 68b Yarn guide 70a , 70b Yarn guides 72a, 72b Fixed guides 82a, 82, 84a, 84b Fixed guides 88a, 88b Swing guides 92a, 92b, 92c, 92d Swing levers 94a, 94b, 94c, 94d Fixed yarn guides 96a, 96b, 96c , 96d First hole of swing lever 8A, the axis of rotation of 98B pivot shaft

Claims (5)

[Claims] 1. A weft control method for a multicolor weft insertion loom including a multicolor weft insertion device having one or more weft insertion means each having a plurality of weft insertion nozzles movable to a weft insertion position. A method of controlling the weft of a multicolor weft weaving loom, comprising: moving a weft insertion nozzle from the weft insertion position to another position to bend the weft passing through the weft insertion nozzle upstream of the weft insertion nozzle. 2. When weft insertion is performed by one weft insertion nozzle of one weft insertion means and the next weft insertion is performed by another weft insertion means, the one weft insertion nozzle is moved from the weft insertion position. The weft control method according to claim 1, comprising moving the weft passing through the one weft insertion nozzle to another position and bending the same at an upstream side of the one weft insertion nozzle. 3. When the weft insertion is not switched, the weft insertion nozzle is moved from the weft insertion position to another position, and the weft passing through the weft insertion nozzle is moved to the weft insertion nozzle. The weft control method according to claim 1 or 2, comprising bending at an upstream side of the weft, and then returning the weft insertion nozzle to the weft insertion position again before the start of the next weft insertion. 4. The weft control method according to claim 1, wherein the weft insertion nozzle is moved at a later stage of the weft insertion period. 5. A multicolor weft insertion device having one or more weft insertion means each having a plurality of weft insertion nozzles movable to a weft insertion position, and a corresponding weft insertion provided corresponding to said weft insertion nozzle. A plurality of weft locking means disposed between the nozzle and the storage device, including a guide member disposed between the weft locking means and the weft insertion nozzle to regulate the path of the weft between them, Weft control device in multicolor weft insertion loom.