JPS6411733B2 - - 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 jacquard machine that selectively drives each weft needle based on pattern information without using pattern paper.

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 needle is removed from the knife, and in this way, the warp threads associated with these needles are selected while distinguishing between the needles that will be pulled up when the knife is raised and those that are not, to create the required shed. 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 takes a lot of effort 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 rapid 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 directly select and drive each horizontal needle with an actuator, without using pattern paper. It's coming. However, in this case, it is extremely difficult to directly drive the horizontal needles using existing actuators such as solenoids and cylinders due to the shape of the horizontal needle pitch, which is only about 4 to 5 mm, and it is expensive. It has disadvantages such as becoming

On the other hand, in order to be able to arrange the solenoids that can sufficiently obtain these driving forces in correspondence with the horizontal needles, the horizontal needles and the suction piece of the suction solenoid are connected with a wire, so that the pitch interval of the horizontal needles can be expanded. has been proposed.

However, although this method is more practical 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.

The present invention provides a weft needle control device for a warp selection device of a jacquard machine that improves the conventional drawbacks, and embodiments thereof will be described in detail 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.
The free piston 8 has the same outer diameter over its entire length, but a ring-shaped locking groove 9, which is wider than at least the wall thickness of a movable stopper to be described later, is provided near the end facing the horizontal needle.

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.
0 to the right, both ends of which are locked to the spring. 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, the situation before the loom starts operating is such that the housing 6 is moved back the most and the rear end surfaces of all the free pistons 8 maintain contact with the solenoids 2.

Now, if the jacquard machine is operated and a current based on the data of the weaving pattern is applied to, for example, the first and third solenoids 2 from the top, the housing 6 will move as shown in FIG. 3b. Move forward in the direction of the arrow. At this time, the second and fourth free pistons 8 move forward together with the housing 6, while the first and third free pistons 8 are attracted to them by the energization of the solenoids 2. Stay in original position.

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 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 and fourth free pistons 8 have movable stoppers 10 in their locking grooves 9.
The area around the locking hole 11 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 pistons 8 that are not attracted are in contact with the horizontal needle 22, they still slide within the sliding hole 7 and the horizontal needle 22
will not be pushed out.

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. The selective energization of the solenoid 2 is started from this moment until the housing 6 is retracted to the rearmost position.

As is clear from the above explanation, the solenoid 2 does not directly move the horizontal needle, but acts as an external signal to the mechanism that sets whether or not to enable pressing of the horizontal needle. Solenoid 2 is energized only at the beginning. Therefore, according to this embodiment, the biasing force of the solenoid 2 is slightly smaller than the sliding resistance of the free piston 8, that is, the lowest resistance force that can follow the movement of the housing 6 by an appropriate frictional force. The bigger the better, this result is 4~
It is possible to sufficiently downsize the solenoid for driving the horizontal needles, which is located at the horizontal needle pitch interval of 5 mm. In other words, even a small solenoid can reliably perform the desired horizontal needle pressing operation.

FIGS. 4a to 4d are sectional views of main parts showing other embodiments of the cross needle control mechanism. That is, in FIG. 4a, fixed stoppers 23 are provided at the front and rear of the housing 6 shown in FIGS. 3a to 3c to prevent the free piston 8 from falling out of the sliding hole 7. 4b, a spring 24 is interposed between the front fixed stopper 23 and the free piston 8 shown in FIG. 4a,
This free piston 24 is biased in the direction of the solenoid 2 to stabilize the suction state when the solenoid 2 is suctioned. Also,
In Fig. 4c, an O-ring made of an elastic material is attached to the outer periphery of the free piston 8 in order to sufficiently follow the moving acceleration of the housing 6 and to prevent it from repelling and separating due to a collision upon contact with the solenoid 2. 25 is installed. Furthermore, in Fig. 4d, in order to reduce the inertial force of the free piston 8 and to alleviate the impact on the horizontal needle, only the attraction part is made of a magnetic material 26 such as iron, and the other parts are made of synthetic resin 27. .

As detailed above, according to the present invention, a solenoid is provided in a holder to correspond to the group of horizontal needles of a jacquard machine, and a solenoid is arranged 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 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 a free piston other than the piston is provided, and the free piston to be operated is selected by the initial energization of the solenoid, and the pointer is moved by the free piston by the subsequent advancement of the housing. By making the push-in action possible, even when the energizing current to the solenoid is small, in other words, even with an extremely small solenoid, the forward and backward movement of the housing can be used to provide sufficient selective control over the horizontal needle. It can be used for pushing work. In this way, the horizontal needle control mechanism is simple and compact, which is not only advantageous in terms of cost, but also requires no complicated assembly to the loom, such as connecting a wire between the horizontal needle and the suction piece, as in the past. This provides the advantage of being able to quickly produce small lots of a wide variety of products.

[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 main parts showing the control order of the horizontal needle, and FIGS. 4 a to d are partial sectional views showing other embodiments of the horizontal needle control mechanism, respectively. . 1...Solenoid holder, 2...Solenoid,
6...Housing, 8...Free piston, 10
...Movable stopper, 22...Horizontal needle.

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. A weft needle control device in a warp selection device of a jacquard machine, characterized in that: 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.