JP2935670B2 - Weft pushing device of jet loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft pushing device for a jet loom.

[0002]

2. Description of the Related Art In a jet loom, a fluid composed of water or air is jetted from a nozzle along a warp row opened by an opening motion, and a weft yarn measured in a required amount each time is placed on this jet stream, and a jet loom is mounted on the jet loom. The woven fabric is manufactured by repeating the operation of inserting from the side and driving the weft before weaving by a beating motion.

In order to detect the insertion error of the weft, a weft detecting device is installed on the opposite side of the nozzle. The device detects the presence of the weft immediately after the insertion, and when the presence of the weft cannot be confirmed, The operation of the loom has been stopped.

[0004]

However, the weft detection by the above-mentioned weft detection device is performed by pushing the weft immediately after insertion on the front surface of the reed by utilizing the operation of the reed moving to the front side of the weaving for the beating movement. It is performed by pushing the device toward the detection device, and therefore, it is necessary to provide an opening for the weft to pass through the detection portion of the weft detection device on one side of the reed. The installation position of this weft detecting device has been installed as close as possible to one ear of the fabric to be manufactured in order to save the amount of weft used. Therefore, the opening provided on one side of the reed needs to be formed at a position corresponding to the installation position of the weft detecting device. Conventionally, each time the weave width of the woven fabric is different, the position corresponding to the weave width of the woven fabric is changed. It is necessary to replace and use a reed with an opening in
The preparation work is troublesome, and the reed must be stored and managed, and the reed needs to be replaced due to a change in the fabric width.

In view of the above problems, the reed has a structure in which an opening is not provided in the reed by causing the weft immediately after insertion to be pushed into the weft detecting device by a thread guide fixedly installed on the front surface of the reed. The present inventor has proposed in Japanese Patent Application Laid-Open No. Hei 6-200452. However, in this proposal, since the yarn guide was fixedly installed on the front surface of the reed, there was another problem that when inserting the weft, the yarn guide narrowed the weft insertion path and hindered the insertion of the weft. .

The present invention has been proposed in view of the above-mentioned problems of the prior art, and has as its object to eliminate the need to provide an opening in a reed and to prevent insertion of a weft yarn.
It is an object of the present invention to provide a weft pushing device of a jet loom which enables a weft immediately after insertion to be pushed into a weft detecting device or the like.

[0007]

According to the present invention, in order to achieve the above object, a fluid consisting of water or air is ejected from a nozzle along a warp row opened by an opening motion, and a required length is measured each time. The weft is placed on this jet, inserted from one side of the loom, and the operation of driving the weft before weaving in a beating motion is repeated to produce a woven fabric, and the weft is detected by the weft detecting device fixed on the opposite side of the nozzle. In the case of a jet loom that stops the operation of the loom when the presence of the weft can not be confirmed, it is suspended or supported on the upper part of the front side of the reed so that it can swing in the same direction as the beating direction. Launched and supported
In the first half of the forward movement of the beating movement by the crank mechanism
Towards weft locking hook which is installed separately from the hook portion or the weft detecting device for the weft immediately after insertion and quickly moved forward to the front weave than reed weft detection system in the latter half process of forward movement by the inertia generated An arm that pushes the arm forward, a stopper that regulates a forward movement end of the arm, and a force that urges the arm in a retreating direction to retreat the reed side from the insertion path of the weft when inserting the weft, and to advance the arm during beating. A spring for adjusting the timing of the movement start, wherein the biasing force of the spring is set to be weaker than the inertial force in the forward movement direction of the arm during the beating movement.

According to the present invention, the arm can be retracted from the weft insertion path to the reed side when the weft is inserted by adopting the above-mentioned structure, and the insertion of the weft is not hindered.
Immediately after the insertion, the weft can be moved toward the hook portion of the weft detecting device or the weft locking hook portion installed separately from the weft detecting device, and moved to the front of the weave earlier than the reed and pushed into the weft. That is, in the present invention, since the beating movement is performed by the crank mechanism, the moving speed of the reed is zero at one end of the reciprocating stroke, but gradually increases to the center of the stroke when moving toward the other end. Paying attention to the point that the speed gradually decreases from the center to the other end and becomes zero, and when the reed moves toward the weaving front side, the speed is gradually increased up to the center of the movement stroke and gradually toward the end of the beating. The arm is decelerated, and the arm can be moved forward faster than the reed by the moving inertia force of the arm generated in the first half of the movement of the reed to the weaving front side. The stopper regulates the forward moving end of the arm due to the inertial force. By the time the reed retreats and the next weft is inserted, the arm automatically returns backward. When the spring is strengthened, the arm starts moving forward later than the operating angle of the crank of 270 °. If the woven fabric is wide, the weft may arrive later than 270 °, so it is necessary to delay the start of the forward movement of the arm beyond 270 °, and therefore a spring is provided.

[0009]

1A is a schematic side view of a main part of a jet loom according to a first embodiment of the present invention when a weft is inserted, FIG.
(B) is a schematic side view at the time of beating, FIG. 2 (A) is a schematic plan view of the loom on the installation side of the weft detecting device, (B)
1 is a schematic front view showing the relationship between a weft detecting device and an arm. In FIG. 1, 1 is a warp, 2 is a weft, 3 is a reed,
Denotes an arm, 5 denotes a stopper, 6 denotes a spring, and 7 denotes a weft detecting device.

The warp yarn 1 is drawn out from the warp beam 8, and is wound on a cross beam 16 via a backrest 9, ayatake 10, healds 11 and 12, a breast beam 13, a winding roller 14 and a guide roller 15. Held 1
The opening motion mechanism (not shown) 1 and 12 is formed by a tappet cam or the like. Each time the weft 2 is inserted, the warp 1 is alternately moved up and down to form an opening for inserting the weft 2.

Although the mechanism for inserting the weft 2 is omitted in the drawing, a nozzle (not shown) is provided on one side of the insertion path for the weft 2, and the nozzle is mounted on the fluid ejected from the nozzle and measured in advance each time. The lengthened weft 2 is skipped and inserted toward the other side. On the side opposite to the nozzle, a weft detecting device 7 and a corresponding arm 4 are installed, and a scissor 17 for cutting the weft that has protruded laterally and a catch cord 18 for catching the cut weft waste are provided. is set up. The weft detecting device 7 has a bifurcated shape as shown in FIG. 1, has an opening toward the reed 3, and is provided with a light emitter and a light receiver for checking the presence of the weft 2 above and below the opening, Further, a hook portion 7a for locking the inserted weft 2 is provided at the lower portion on the inner side at the back, and when the weft 2 is not confirmed, the movement of the loom is stopped. In the case of a water jet loom, the light projector and the light receiver are installed at different positions that do not come into contact with water, and from this position are guided to the bifurcated portion by an optical fiber cable, and are connected to a terminal of the optical fiber cable. Are installed facing each other.

The reed 3 is driven by a crank (not shown) of the beating movement mechanism interlocked with the opening movement mechanism in a manner as shown in FIG. 3 to perform a beating movement. An arm 4 is suspended and supported on a front upper portion of the reed 3, that is, an upper portion on the weave front 19 side, via a pivot 4 a so as to be swingable in the same direction as the beating direction. Also, on the lower front of the reed 3,
A stopper 5 that regulates the forward moving end of the arm 4 is provided. A spring 6 for urging the arm 4 in the backward direction is provided on the pivot 4a. The strength of this spring 6 is
The arm 4 can be adjusted, and its biasing force is set to be weaker than the inertial force of the arm 4 during the beating movement. Arm 4
Although a thin metal wire is formed into a U shape so that the weft detecting device 7 can be sunk as shown in FIG. 2B, another shape may be used.

The first embodiment of the present invention has the above configuration, and the operation will be briefly described below. First, a fluid consisting of water or air is ejected from a nozzle along one row of the warp yarn opened by the opening motion, and the weft 2 measured for the required amount each time is placed on this jet, and inserted from one side of the loom, The operation of driving the weft 2 into the weave 19 with the reed 3 by the beating motion is repeated to produce the woven fabric 20, which is wound around the cross beam 16.

When the weft 2 is inserted, the arm 4 can be retracted from the insertion path of the weft 2 toward the reed 3, so that the insertion of the weft 2 is not hindered. It can be moved to the cloth fell 19 side earlier than the reed 3 toward 7 and pushed. That is, in the present invention, since the beating motion is performed by the crank mechanism, the moving speed of the reed 3 is zero at one end of the reciprocating stroke, but gradually increases to the center of the stroke when moving toward the other end, Paying attention to the point that the speed is gradually reduced from the center toward the other end to become zero, and when the reed 3 moves toward the weave 19, the speed is gradually increased up to the center of the moving stroke, and the beating end Gradually slow down toward this reed 3
The arm 4 can be moved forward faster than the reed 3 by the movement inertia of the arm 4 generated in the first half of the movement of the arm 4 toward the weave front 19 side. The stopper 5 regulates a forward moving end of the arm 4 due to the inertial force. The return spring 6 is for returning the arm 4 backward by the time the reed 3 retreats and the next weft 2 is inserted.

FIG. 4A is a schematic side view of a main part of a jet loom according to a second embodiment of the present invention when a weft is inserted, and FIG. Is shown rising from the support leg of the reed 3, and other configurations and operations are the same as those of the first embodiment, so that the same members are denoted by the same reference numerals and description thereof will be omitted.

In each of the above embodiments, the case where the hook portion 7a is provided in the weft detecting device 7 is illustrated. However, the present invention is directed to a weft locking hook portion which is installed separately from the weft detecting device 7. It can also be applied to the case where the user pushes down. Conventionally, pushing the weft into the hook portion is performed by the reed itself using the forward movement of the reed (beating operation).
Therefore, it was necessary to open a window in the reed. However, if the present invention is applied, it is not necessary to provide such a window in the reed.

[0017]

According to the present invention, there is no need to provide an opening in the reed, and furthermore, the insertion of the weft is not hindered, and the weft immediately after insertion is installed separately from the hook portion of the weft detector or the weft detector. It is possible to provide a weft pushing device of a jet loom that can be pushed into the weft locking hook portion.

[Brief description of the drawings]

1A is a schematic side view of a main part of a jet loom according to a first embodiment of the present invention when a weft is inserted, and FIG.

FIG. 2 (A) is a schematic plan view of a loom on the installation side of a weft detecting device, and FIG. 2 (B) is a schematic front view showing a relationship between the weft detecting device and an arm.

FIG. 3 is a time chart showing an operation related to a crank, a reed, and an arm.

FIG. 4A is a schematic side view of a main part of a jet loom according to a second embodiment of the present invention when a weft is inserted, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Warp 2 Weft 3 Reed 4 Arm 5 Stopper 6 Spring 7 Weft detector

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) D03D 51/34 101 D03D 49/60 D03D 47/28

Claims (1)

(57) [Claims] 1. Along a warp row opened by an opening motion,
A fluid consisting of water or air is ejected from the nozzle, and the weft yarn measured for the required amount is placed on this jet each time, inserted from one side of the loom, and the wefting operation is repeated by a beating motion to repeat the operation of weaving the fabric. In the jet loom which stops the operation of the loom when the presence of the weft is confirmed by the weft detecting device fixed to the opposite side of the nozzle and when the presence of the weft cannot be confirmed, the front side of the reed is woven. Is supported by a swing mechanism in the same direction as the beating direction .
Apart from the hook portion or the weft detection device of the weft detecting device weft immediately after insertion moves forward quickly to the front weave than the reed in that the second half process of beating motion forward forward movement due to inertia generated in the first half process of movement of An arm that is pushed toward the weft-engaging hook portion to be installed, a stopper that regulates a forward movement end of the arm, and a force that retreats the arm in a retreating direction to insert the weft into the reed side from the weft insertion path. And a spring for adjusting the timing of the start of the forward movement of the arm at the time of the beating, and the urging force of the spring is used to advance the arm at the time of the beating.
A weft pushing device for a jet loom, characterized in that it is set weaker than the directional inertial force.