JPH0157171B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weft needle control device in a warp selection device of a jiacard machine that selectively drives each weft needle based on pattern information without using pattern paper. The present invention relates to a weft needle control device in a warp selection device that ensures a reliable selection operation.

The selection of warp threads on conventional jia card machines uses a series of thick paper with weaving information punched in advance according to the weaving pattern, and these paper patterns are connected in an endless band and passed through the cylinder of the loom. Each rotation of the loom, one sheet is fed and pressed against the horizontal needle via a mechanical link mechanism, and the horizontal needle is selectively pressed and moved depending on the presence or absence of punched holes in the pattern paper at that time. The corresponding needles are removed from the knife, and in this way the warps associated with them are selected to create the required shed, distinguishing between the needles that will be pulled up when the knife is raised and those that are not. ing. However, this selection of pattern paper not only requires a great deal of effort and expense to create pattern paper with weaving information, but also requires special techniques. It requires a large number of main characters and space,
In addition, the spacing of the punch holes punched in the patterned paper differs depending on the region of production, and even in the same production region, the mechanism may differ depending on the textile factory, so it is difficult to find a pattern that matches the mechanism of the loom. It has problems such as the need for paper.

In addition, especially in recent years, jacquard fabrics have become increasingly diverse and sophisticated as lifestyles have improved, and woven patterns have become extremely complex or luxurious, making them highly fashionable and increasing the fashion cycle. It is extremely difficult to predict in a situation where weaving is fast and the duration is short, so it is absolutely necessary to make trial weaves and samples or products in a short period of time. Due to these changes in the market structure, it is essential to quickly produce a wide variety of small-lot products, and it is also required for Jia card machines to select and drive each horizontal needle directly with an actuator without using a pattern paper. It's coming. However, in this case, it is extremely difficult to directly drive the horizontal needles using current actuators such as solenoids and cylinders due to the pitch spacing of the horizontal needles, which is only about 4 to 5 mm, and is expensive. It has disadvantages such as becoming

On the other hand, in order to arrange the solenoid corresponding to the horizontal needle to obtain sufficient driving force, the horizontal needle and the suction piece of the suction solenoid are connected with a wire, so that the pitch between the horizontal needles can be expanded. Something is being proposed.

However, although this method is more realistic than directly driving the cross needle with a solenoid, etc.
Not only was the structure complex and large, requiring time to assemble and adjust to the loom, but it was also not advantageous in terms of cost. Therefore, it has not been possible to fully satisfy the conventional market demands mentioned above.

In response, the present applicant has provided a weft needle control device for a warp selection device of a jacquard machine that improves the above-mentioned drawbacks. The conventional example will be specifically explained below with reference to the drawings.

1 and 2 are a plan view and a front view of the entire horizontal needle control mechanism, with the attachment mechanism to the loom main body, solenoid control device, etc. omitted. In the figure, reference numeral 1 denotes a solenoid holder which is suspended horizontally on a bracket fixed to a frame or the like on the warp selection device side, and a large number of solenoids 2 are held in this solenoid holder so as to pass through its plate thickness. The intervals between these solenoids 2 are equal, and the pitch dimension is set to be extremely small. Reference numeral 3 denotes a post protruding from the back side of the solenoid holder 1, on which an insulating mounting board 4 is fastened and held by screws 5, and each solenoid 2 is mounted on this mounting board 4.
The rear ends of the solenoids 2 are supported, and the lead terminals of the solenoids 2 are led out.

On the other hand, in front of the solenoid holder 1, a housing 6 is disposed in place of the cylinder of the Jacquard machine and integrated with an interlocking member (not shown) that slides horizontally in response to the swinging motion of the cylinder operating arm. . This housing 6 repeatedly moves forward and backward relative to the horizontal needles with each movement of the loom.

The housing 6 is provided with sliding holes 7 at equal intervals corresponding to the number of horizontal needles through which the horizontal needles can penetrate, and one free piston 8 is installed in each of these sliding holes 7. Built-in so that it can slide freely.
This free piston 8 has the same outer diameter over its entire length, but near the end facing the horizontal needle there is a ring-shaped lock 9 that is wider than the wall thickness of a movable stopper, which will be described later.
is provided.

A movable stopper 10 that can slide perpendicularly to the sliding direction of the free piston 8 is provided on the front surface of the housing 6.
Also provided is a locking hole 11 having the same diameter as or slightly larger than the sliding hole 7 of the housing 6.

Reference numeral 12 denotes four guides attached to the housing 6 with screws 13, along which the movable stopper 10 horizontally slides in the left-right direction. 14 is a movable stopper 1 relative to the housing 6.
It is a spring that biases 0 left and right and both ends are locked to these. 15 is the movable stopper 1
This is a regulating piece that regulates the amount of sliding at zero.

On the other hand, a pair of guide holes 16 are bored at the left and right ends of the housing 6, into which a guide pin 18 having a conical portion 17 at the tip is slidably inserted. The portion 17 is inserted through a guide hole 19 provided in the movable stopper 10 so as to face the guide hole 16 thereof. These guide holes 16 and 19 have approximately the same size, and a guide hole 19 is formed at the end of the conical portion 17.
Regulating pin 20 to prevent more than the required amount from escaping from the
is inserted.

Note that the guide pin 18 is always urged rearward (toward the solenoid holder 1 side) by a spring 21 that is engaged between the guide pin 18 and the housing 6.

22 corresponds to the number of free pistons 8,
Located in front of these are the horizontal needles.

Next, the operation of the horizontal needle control mechanism will be described.

As shown in FIG. 3a, before the loom starts operating, the housing is at its most retracted position, and the rear end surfaces of all the free pistons 8 are in contact with the solenoids 2.

Now the jiacard machine is activated, and the current based on the data of the weaving pattern is, for example, the first one from the top.
If the flow is caused by the third solenoid 2, the housing 6 moves forward in the direction of the arrow as shown in FIG. 3b. At this time, the second free piston 8 moves forward together with the housing 6, while the first and third free pistons 8 are attracted to each other by the energization of the solenoids 2 and returned to their original positions. Stay.

The horizontal needle 2 of the free piston 8 that was attracted at this time
The second end face passes through the locking hole 11 of the movable stopper 10 and enters into the sliding hole 7 of the housing 6.

In this state, the movable stopper 10 receives the elastic force of the spring 14 as the solenoid 2 is stopped from being energized and the guide pin 18 retreats within the guide hole 16 of the housing 6. and slide to the right. That is, the movable stopper 10 acts to reduce the diameter of the sliding hole 7. Thus, the second free piston 8
The locking hole 1 of the movable stopper 10 is inserted into the locking groove 9.
The periphery of the solenoid 1 is locked, and further return to the solenoid 2 side is prevented. Note that the energizing and stopping of the solenoid and the movement of the movable stopper 10 do not necessarily need to be activated at the same timing.

Subsequently, the housing 6 moves forward, but only the free piston 8 that has not been attracted by the solenoid 2 is moved forward with the periphery of the locking hole 11 being locked in the locking groove 9, and the horizontal needle 22 is moved forward. It comes into contact with the rear end surface and pushes it forward. On the other hand, even if the other free piston 8 that is not attracted to the piston contacts the horizontal needle 22, it slides within the sliding hole 7 and does not push out the horizontal needle 22.

Next, when the housing 6 completes its forward movement and then starts its backward movement, the free piston 8 moves back together with the housing 6 while remaining in the state shown in FIG. 3c.
The rear end surface of the free piston 8 that was attracted first comes into contact with the solenoid 2 and is pushed back into the sliding hole 7. Then, the movable stopper 10 is moved to a position where the free piston 8 is free to move, that is, before the free piston 8 that has been attracted earlier is pushed back and its tip surface collides with the movable stopper 10, that is, in FIG. 3a. returned to the indicated position. Further, when the housing 6 is retracted almost to the rearmost position, the free piston 8 that was not attracted earlier also comes into contact with the solenoid 2. Note that the selective energization of the solenoid 2 is started from this moment until the housing 6 is retracted to the rearmost position. In this way, the solenoid 2 does not move the horizontal needle linearly, but only at the beginning of the operation of the control mechanism, the solenoid 2 is energized.

By the way, in such a horizontal needle control device, since the solenoid 2 has residual magnetism even after the current is cut off, the solenoid 2
Even though no current is applied to the free piston 8, the free piston 8 continues to be attracted and remains, or is only pulled to a halfway position, which hinders the movement of the movable stopper 10. Furthermore, when the housing 6 is moved back, the horizontal needle may temporarily stick to the end surface of the free piston 8 through oil or the like, causing the problem that the free piston 8 remains in a halfway position. It was happening. As a result, there was a drawback that accurate selection operation by the solenoid 2 of the free piston 8 could not be performed.

The present invention aims to solve such conventional drawbacks, and includes a magnet attached to the side of the free piston opposite to the solenoid, and an adsorption device that is biased toward the solenoid side by a spring in the housing and moves toward and away from the magnet. The adhesion force against the attraction piece of the magnet is reduced by the adsorption force of the energized solenoid, and is made larger than the adsorption force due to the residual magnetism of the de-energized solenoid, and the spring reaction force is reduced by the adhesion force between the horizontal needle and the free piston. To provide a weft needle control device in a warp selection device of a jacquard machine, which is made larger than the above, thereby making it possible to reliably perform a free piston selection operation.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIGS. 4a, b, c, and d are cross-sectional views of main parts showing operational changes of the cross needle control device of the present invention, and the same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals. is attached. In the figure, 6A is a housing, and a free piston 8a is attached to this housing 6A.
A sliding hole 7A for slidingly supporting the is provided. A free piston 8A is provided on the back of the housing 6A.
A position regulating plate 31, a spring sheet plate 32, and a suction piece locking plate 33 are fixed by screws 36 via spacers 34 and 35. Further, a magnet 38 and an iron piece 38a are attached to the rear end of the free piston 8A via a connecting rod 37, and the connecting rod 37 is slidably supported by the regulating plate 31 and the spring sheet plate 32, and the magnet 38 is attached to the rear end of the free piston 8A. 38 is provided so as to be able to move in and out of a through hole 39 provided in the suction piece holding plate 33 and to correspond to the axis of the solenoid 2 . Reference numeral 40 denotes a suction piece made of an iron plate or the like that is located between the spring sheet plate 32 and the suction piece locking plate 33 and does not come out of the through hole 39 even though it is biased in the direction of the solenoid 2 by the spring 41.

Further, the attraction force between the magnet 38 and the attraction piece 40 is set to be smaller than the attraction force of the energized solenoid 2, and greater than the attraction force due to residual magnetism of the non-energized solenoid 2. The setting can be easily made by selecting the attracting area and distance of the solenoid 2 and the magnet 38, or the thickness of the magnet. On the other hand, the spring 41 is designed so that its resiliency is greater than the adhesive force of oil adhering to the contact surface between the free piston 8A and the horizontal needle 22.

Next, the operation of this horizontal needle control device will be explained.

First, FIG. 4a shows the housing 6A in its most retracted state, and the iron piece 38a integrated with the free piston 8A is pressed against the end surface of the solenoid 2. When the housing 6A moves forward from this position,
The free piston 8A corresponding to the energized solenoid 2 attracts the iron piece 38a and remains, and the free piston 8A corresponding to the de-energized solenoid 2 attracts the iron piece 38a due to the attraction force between the magnet 38 and the attraction piece 40.
It moves forward following the housing 6A. Such a situation is also shown in FIG. 4b.

In this way, the selection operation of the free piston 8A is made so that the free piston 8A is attracted to the solenoid 2, but by reliably selecting whether to integrate the free piston 8A into the housing 6A, the unstable state of the free piston 8A that has conventionally occurred can be avoided. disappears.

Next, the housing 6A moves forward further and comes to the position shown in FIG.
While touching the end, push the horizontal needle 22 further forward. In this way, warp thread selection is performed by moving the horizontal needles 22.

Subsequently, the housing 6A begins to retreat. For this reason, the free piston 8A that pushed the horizontal needle 22 is pulled by the adhesive force of the oil adhering to these contact surfaces, and cannot retreat beyond a certain position. However, the magnet 38 comes into contact with the suction plate 40 again, and then the magnet 38 in FIG.
Although the spring 41 bends by a small amount, the repulsive force overcomes the adhesive force, and the free piston 8A is forcibly separated from the horizontal needle 22. With the subsequent retraction of the housing 6A, the free piston 8A is returned to the position shown in FIG. 4a. As a result, the iron piece 38a integrated with the free piston 8A comes into complete contact with the solenoid 2, and the selection operation of the free piston 8A in the next step is reliably continued.

In this way, even if the adhesion force due to the residual magnetism of the solenoid 2 and the adhesive force between 8A and the horizontal needle 22 through the oil act, the selection operation of the free piston 8A is reliably performed, and the free piston is 8
This can prevent A from stopping at a halfway position.

As explained above, according to the present invention, a magnet is attached to the side of the free piston facing the solenoid, and an adsorption piece is provided in the housing that is biased toward the solenoid by a spring and moves toward and away from the magnet, The attraction force of the magnet is selected to be smaller than the attraction force of the energized solenoid and larger than the attraction force due to the residual magnetism of the de-energized solenoid, and the reaction force of the spring is selected to be smaller than the attraction force of the energized solenoid to the attraction piece of the magnet, and the reaction force of the spring is selected to be smaller than the attraction force of the energized solenoid against the attraction piece of the magnet. By selecting the force to be larger than the force, the solenoid and the housing can reliably select the free piston, thereby ensuring that the warp yarn selection can be performed accurately along the weaving pattern.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view showing the entire horizontal needle control device according to the present invention, FIG. 2 is a front view,
FIGS. 3a, b, and c are plan sectional views of the main parts showing the control order of the horizontal needle, respectively, and FIGS. 4 a to d are sectional views of the main parts showing the operating change states of the horizontal needle control mechanism of the present invention, respectively. It is. 1...Solenoid holder, 2...Solenoid,
6A...housing, 8A...free piston,
10...Movable stopper, 22...Horizontal needle, 38...
Magnet, 40...adsorption plate, 41...spring.

Claims (1)

[Scope of Claims] 1. A solenoid disposed in a holder to correspond to a group of horizontal needles of a jacquard machine; a housing disposed in front of the holder so as to move forward and backward with each movement of the loom; A free piston that is slidably attached to the housing and is provided to face the solenoid; and a free piston other than the free piston that slides in the left and right direction with respect to the housing and is attracted to the solenoid. A movable stopper for locking and holding the piston is provided, and the free piston to be operated is selected by the initial energization of the solenoid, and the subsequent forward movement of the housing causes the free piston to push the horizontal needle. In the weft needle control device for a warp selection device of a jacquard machine, a magnet is attached to a surface of the free piston facing the solenoid, the housing is biased toward the solenoid by a spring, and the magnet is biased toward the solenoid by a spring. At the same time, an adsorption piece that moves toward and away from the magnet is provided, and the adsorption force of the magnet to the adsorption piece is
The attraction force of the spring is selected to be smaller than the attraction force of the energized solenoid and larger than the attraction force due to residual magnetism of the non-energized solenoid, and the reaction force of the spring is selected to be greater than the adhesive force of the horizontal needle and the free piston through the oil. A weft needle control device in a warp selection device of a jacquard machine, characterized by: 2. A patent claim in which the free piston is provided with a locking groove and the movable stopper is provided with a locking hole so that they lock and hold each other, and the locked free piston allows the horizontal needle to be pushed in. A horizontal needle control device in a warp selection device of a jacquard machine according to item 1. 3. A weft needle control device in a warp selection device for a jacquard machine according to claim 1, wherein the solenoid is energized prior to the movement of the housing. 4 The sliding of the movable stopper with respect to the housing is as follows:
2. A weft needle control device in a warp selection device for a jacquard machine as set forth in claim 1, wherein the weft needle control device is operated by guiding a movable stopper with the slope of a guide pin inserted into the housing.