JPH0327654B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic dobby for raising and lowering a heddle frame of a loom.

[Conventional technology]

In a loom having a heald frame, the case where the heald frame is raised and lowered by a passive dobby machine will be explained with reference to FIG.

In FIG. 6, 1 is a loom frame, 2 is a heald frame, and 3 is a dobby loom. First, the heald frame 2 has connecting rods 4 at both ends thereof.
The heald frame 2 is suspended so that it can be raised and lowered freely, and the heald frame 2 is always held at the position shown by a spring (not shown). On the other hand, a wire 5 is connected to the heald frame 2 and connected to the dobby machine 3 via a guide roller 6, and the dobby machine 3 pulls the wire 5 in the direction of the arrow 7 shown in the figure to resist the force of the spring. The hold frame 2 is moved downward.

A large number of heald frames 2 are provided in the direction of the paper, and warp threads are passed through the heald frames 2. Each heald frame 2 is raised and lowered alternately as appropriate, and the weft thread is inserted into the opening of the warp threads formed between them. Weaving is done by passing it through.

A dobby machine 3 for drawing in the wire 5 has a pair of holding hooks, and when the holding hooks are in the working position, the wire 5 is drawn in, and when the holding hooks are in the non-working position, the wire 5 is not drawn in.
Conventionally, a peg card is used to determine the active and non-active positions of the holding hook.

In place of this peg card, the present applicant proposed a dobby machine that uses magnetic force to determine the active and non-active positions of the holding hook (Japanese Patent Application No. 78152/1983).

The dobby machine of this prior application will be explained with reference to FIGS. 4 and 5.

First, the end 5a of the wire 5 is placed inside the dobby machine body.
A rotatable jack lever 11 for connecting the wires 5 and drawing the wire 5 is provided rotatably about a fixed shaft 12.

A doglegged lever 14 is connected to the jack lever 11 via a lever ratio adjustment arm 13, and the lever 14 is rotatably provided around a fixed shaft.

A balk plate 18 having movable hooks 17a and 17b at both ends is connected to this doglegged lever 14 by a pin 16.

On the other hand, there is provided a reciprocating lever 21 that engages with the camshaft 19a of the cam 19 and reciprocates in the direction of the arrow 20 shown in the figure by the rotation of the cam 19, and a drive lever 23 is connected to the tip of the reciprocating lever 21 with a pin 22. Ru. Although the drive lever 23 is not shown, it is rotatably fixed to the main body of the dobby machine at approximately the same position as the pin 16 of the dogleg-shaped lever 14.
Pressing pieces 23a and 23b at both ends thereof are provided so as to come into contact with the back surface of the balk plate 18 on the opposite side from the movable hooks 17a and 17b.

The dobby machine body has holding hooks 35a and 35 having hooks 36a and 36b that engage with the movable hooks 17a and 17b of the balk plate 18, respectively.
b are rotatably provided around fixed shafts 38a and 38b, respectively.

These holding hooks 35a, 35b are held by springs 39a, 39b, respectively, with stoppers 55a, 35b.
55b and is urged to rotate to the non-operating position.

The holding hooks 35a and 35b are attached to the hook portion 36.
The hook parts 36a, 36b and the movable parts 37a, 37b have movable parts 37a, 37b that rotate between an active position where the hooks a and 36b are engaged with the movable hooks 17a and 17b and a non-active position where the hooks a and 36b are disengaged. are rotatably provided on fixed shafts 38a and 38b, respectively. These movable parts 37a, 37b and the hook part 36
Spring 39a, 39b is provided between a, 36b, and the hook parts 36a, 36b are always movable part 3.
The stopper pieces 7a and 37b are brought into contact with the stopper pieces 40a and 40b so that they rotate together. Movable part 37
In a, 37b, there are grooves 45 of action levers 44a, 44b, in which sliders 42a, 42b are rotatably provided on a fixed shaft 43 by means of pins 41a, 41b.
a, 45b in a slidable manner.

The action levers 44a, 44b have operation parts 46a, made of magnetic material, for rotating the action levers 44a, 44b to the working/non-working position.
46b, and solenoids 47a and 47b, which are magnetic force holding means for attracting the operating parts 46a and 46b, are arranged opposite to the operating parts 46a and 46b.

Further, the action levers 44a, 44b have cam lever parts 48a, 48b, and a spring 49 is provided between the cam lever parts 48a, 48b, and an auxiliary cam 50 is provided.

Further, the solenoids 47a and 47b are formed by having a core 52 mounted in a U-shape on the mounting space 51, and coils 53 and 53 provided on both sides of the core 52.

In addition, the hook portions 3 of the holding hooks 35a and 35b
Both hook portions 36a, 36b are provided between 6a, 36b.
A spring 54 is provided to urge the hook portions 36a, 36b to rotate toward the non-active position, and stoppers 55a, 55b are provided to restrict the rotation of the hook portions 36a, 36b in the non-active position.

The auxiliary cam 50 is connected to the auxiliary cam 50 via an intermediate gear 57 from a drive gear 56 connected to the shaft of the cam 19 that drives the drive lever 21, and rotates in synchronization with the rotation of the cam 19 by a driven gear 58. be done.

Next, the operation will be explained.

First, the holding hook 35a, which is a lifting support means,
When the hook portions 36a, 36b of the balk plate 18 are in the operating position where they engage with the movable hooks 17a, 17b of the balk plate 18, the doglegged lever 14 is rotated, the wire 5 is pulled in through the jack lever 11, and the heald Frame 2 descends (or rises)
When the hook portions 36a and 36b are in the non-operating position where they are not engaged with the movable hooks 17a and 17b of the balk plate 18, the heald frame 2 is raised (or lowered) in the opposite manner to the above.

That is, the hook portions 36a and 36b are in the operating position, and in this state, the reciprocating lever 2 is moved by the cam 19.
1 is reciprocated in the direction of the arrow 20 shown in the figure, the drive lever 23 is rotated. At this time, when the drive lever 23 is rotated counterclockwise from the illustrated state, the hook part 36a of the upper holding hook 35a and the movable hook 17a of the balk plate 18 are engaged, so that the balk plate 18 is rotated. The pin 18a that connects the movable hook 17a is fixed, so the rotational force of the drive lever 23 is transmitted from the pressing piece 23b to the balk plate 18, and the balk plate 18 is rotated counterclockwise about the pin 18a. Accordingly, the dog-shaped lever 14 connected by the pin 16 is rotated clockwise, and the jack lever 11 is rotated clockwise via the lever ratio adjustment arm 13 to pull in the wire rope 5, and the heald frame 2 ( Figure 6) will be lowered.

Similarly, when the lower hook portion 36b is in the operating position, the jack lever 11 is similarly rotated clockwise.

Next, when the holding hook parts 36a, 36b are in the non-operating position, the movable hooks 17a, 17b of the balk plate 18 alternately move the holding hooks 35a, 35
b, but is not engaged with the holding hooks 35a, 35b, and even if the drive lever 23 rotates clockwise or counterclockwise, the movable hooks 17a, 17b at both ends of the balk plate 18 are restrained. Since the heald frame 2 is not attached, it becomes free, and the heald frame 2 is raised by the force of the spring explained in FIG.
4 will be returned to the position shown by the solid line.

In order to rotate the holding hooks 35a, 35b to the working/non-working position, the holding hooks 35a, 35b must be rotated.
Action levers 44a, 4 that rotate 35b
What is necessary is to control the energization of the solenoids 47a and 47b corresponding to the operation parts 46a and 46b of the controller 4b.

That is, when the solenoid 47a is energized,
The operating portion 46a of the action levers 44a, 44b is attracted and held by the magnetic force of the solenoid 47a to the tip of the core 52 of the solenoid 47a, and the action lever 44a is moved accordingly.
The movable part 37a of the holding hook 35a is rotated from the groove 45a of the holding hook 35a through the slider 42a and the pin 41a, and at the same time the hook part 36 is rotated by the spring 39a.
a is also rotated to the operating position shown in FIG. 4, so that it can engage with the movable hook 17a of the balk plate 18. In this case, since the hook portion 36a is supported by the spring 39a and can be moved to the non-operating position, the movable hook 1 of the balk plate 18
Even if it collides with 7a, it can escape and engage.

Further, if the solenoid 47a is not energized, the hook portion 35a of the holding hook 35a
At the same time, the movable portion 37a is rotated via the spring 37a, and the operating portion 46a of the action lever 44a is separated from the solenoid 47a.

The rotation range of the operating portion 46a of the action lever 36a is set at a small angle (for example, 3 degrees) since there is a limit to the suction force of the solenoid 47a.
In order to attract the
By mechanically urging the solenoid 6a closer to the solenoid 47a, the relatively small capacity solenoid 4
7a enables adsorption.

[Problem to be solved by the invention]

By the way, the operation section 46 by this auxiliary cam 50
A, 46b are biased by holding hooks 35a, 35b.
The hook portions 36a, 36b are movable hooks 17a,
17b, that is, the range in which the movable hook 17a is not pressed into contact with the holding hooks 35a, 35.
When approaching the b side, the scrap operating parts 46a, 46b are positioned as close to the solenoid 52 as possible while there is a clearance between the engaging surfaces of the hooks 17a, 17b and the engaging surface of the hook part 36a. It is preferable to do so because the range of attraction and movement due to magnetic force becomes smaller.

Further, in recent years, the speed of the dobby has been increased, and it is preferable that the auxiliary cam 50 and the cam lever portions 48a, 48b have less wear due to their contact.

However, in the invention of the earlier application mentioned above, the auxiliary cam 50 and the cam lever parts 48a, 48b
In other words, the operating angle is large, and therefore, while there is clearance between the movable hooks 17a, 17b and the hook portions 36a, 36b, the angle at which the operating portions 46a, 46b approach the maximum is limited. easy to receive. In addition, there remains the problem of increased wear due to the large operating angle.

An object of the present invention is to further improve the invention of the prior application mentioned above, and to provide an electronic dobby that is good for speeding up and can minimize the attraction movement due to the magnetic force when holding the holding hook with the magnetic force holding means. shall be.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a holding hook that rotates to an operative or non-operative position to determine the elevation or descent of a heald frame, and a magnetic force retainer that holds the holding hook in an operative or non-operative position using magnetic force. auxiliary cam means, which comprises a roller provided on the side of the holding hook and a cam that swings the roller; the rotation of the cam urges the holding hook to rotate to the active/non-active position via the roller; It is equipped with the following.

[Effect]

According to the above configuration, since the auxiliary cam means consists of a roller and a cam, its operation is smooth even under high-speed rotation, and since the cam comes into contact with the roller, its operating angle can be reduced, and the magnetic force holding means can attract The range of movement can be reduced.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

1 to 3 show an example of the electronic dobby of the present invention, but it is basically the same as the invention of the earlier application explained in FIGS. The same reference numerals as in the application are given, and the explanation thereof will be omitted.

First, the solenoid 47a, which is a magnetic force holding means,
Action lever 44 held by suction by 47b
a, 44b are operating parts 46a, 46b which are rotatably provided on the fixed shaft 43 and held by suction to solenoids 47a, 47b, and holding hooks 35a, 35b.
The cam lever has grooves 45a and 45b that slidably engage sliders 42a and 42b supported by pins 41a and 41b in the movable parts 37a and 37b of the cam lever, and also rotatably supports the rollers 61a and 61b of the auxiliary cam means 60. It has parts 62a and 62b.
The cam lever parts 62a, 62b are provided so as to face each other, and a spring 49 is connected therebetween, so that the corresponding operating parts 46a, 46b are biased away from the solenoids 47a, 47b. The cam 63 of the auxiliary cam means 60 is formed by attaching a protrusion 64 to the outer periphery of a circular cross section. ,
The driven gear 58 is integrally connected to the cam 63 and is rotated in synchronization with the rotation of the cam 19.

When the holding hooks 35a and 35b are in the non-operating position, the cam 63 is attached to its cam lever portion 62.
a, 62b and the circumferential surface of the cam 63 are formed with a diameter slightly apart from each other in a non-contact state, and the protrusion 64
starts to come into contact with the rollers 61a, 61b, and after moving the cam lever parts 62a, 62b to the operating position side to the maximum operating position, the rollers 61a, 61b
The working angle θ until it separates is 40°.

Next, the operation of this embodiment will be explained.

For example, as shown in FIG.
5a is held in the working position and engaged with the movable hook 17a, the holding hook 35a is held in the non-working position shown by the two-dot chain line in the figure, where it hits the stopper 55 by the force of the spring 54, until the movable hook 17a approaches. be done. In this state, when the movable hook 17a approaches the maximum as shown in the figure, the protrusion 64 of the cam 63 of the auxiliary cam means 60 comes into contact with the roller 61a rotatably provided on the cam lever portion 62a of the action lever 44a. , that cam 63
When it rotates further, the roller 61a is pushed down and the action lever 44a is rotated as shown by the solid line in the drawing, thereby moving the operating portion 46a to a position where it comes into close contact with the solenoid 47a. At this time, the solenoid 47a is energized and holds the operating part 46a thereof by suction, and as a result, the hook part 36a of the holding hook 35a is held in the operating position shown in the figure, so that it engages with the movable hook 17a and its movable position. As a result of preventing the hook 17a from returning, the jack lever 11 is rotated to pull in the wire 5a as described above.

This auxiliary cam means 60 is a contact between a roller 61a and a cam 63 having a protrusion 64, and the roller 61a can rotate freely even at high speeds, so it has good wear resistance. Further, when pushing down the roller 61a with the protrusion 64, the operating angle θ while the protrusion 64 is in contact with the roller 61a can be made as small as possible, so that the movable hook 17a is able to press down on the hook portion 3 of the holding hook 35a.
6a has a clearance c, and it is possible to bring the operating portion 46a as close as possible to the solenoid 47a.

Although the above description has been made using the example of the upper holding hook 35a, the same applies to the lower holding hook 35b.

Further, when the holding hooks 35a, 35b are held in the non-operating position, the solenoids 47a, 47b are not energized, and therefore the operating portion 46 is not energized as described above.
Even if the solenoids a and 46b are brought close to the solenoids 47a and 47b by the auxiliary cam means 60, they are not attracted by the magnetic force, so the holding hooks 35a and 35b are returned to the non-operating position where they hit the stoppers 5a and 55b by the force of the spring 54. Movable hook 17
a, 17b, the balk plate 18 and the swing lever 23 only swing around the pin 16, and the jack lever 11 is not rotated either.

The auxiliary cam means 60 is attached to the holding hooks 35a, 35.
b and the movable hooks 17a, 17b have a clearance c
Since the holding hooks 35a, 35b can be rapidly moved up and down under certain conditions regardless of whether the cam 63 rotates in the forward or reverse direction, the shedding motion can be followed regardless of whether the loom is in the forward or reverse direction of rotation.

In the above embodiment, the solenoids 47a, 4
Although the holding hooks 35a and 35b are held in the operating position when the power is applied to the holding hook 7b, and the holding hooks 35a and 35b are held in the non-operating position by the spring 54 when the power is not applied, it is also possible to control both positions with a solenoid. good.

Further, although the heald frame 2 is lowered when the holding hooks 35a and 35b are in the operating position, it may be raised. Furthermore, although the example of passive dobby has been explained, active dobby may also be used.

In addition, the holding hooks 35a and 35b are connected to the solenoid 47a and the solenoid 47a through the action levers 44a and 44b.
47b, but the holding hook 35
a, 35b may be directly held by solenoids 47a, 47b.

〔Effect of the invention〕

As is clear from the above explanation, the present invention exhibits the following excellent effects.

(1) Since the holding hook is set to the active or non-active position using a solenoid, there is no need for a conventional peg card.

(2) By composing the auxiliary cam means that urges the rotation of the holding hook with a roller and a cam, high-speed operation is possible and holding by the magnetic force holding means is facilitated.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, FIG. 3 is a diagram explaining the operation of the present invention, and FIG. 4 is an example of the invention of the earlier application. 5 is an enlarged view of the main part of FIG. 4, and FIG. 6 is a diagram showing an example of a loom. In the figure, 35a and 35b are holding hooks that are lifting support means, 47a and 47b are solenoids that are magnetic force holding means, 60 is an auxiliary cam means, and 61a and 61
b is a roller, and 63 is a cam.

Claims (1)

[Claims] 1. A holding hook that rotates to an active/non-active position to determine whether the heald frame is raised or lowered, a magnetic force holding means that uses magnetic force to hold the holding hook in an active or non-active position, and a roller provided on the side of the holding hook. An electronic dobby comprising: a cam that swings the roller; and auxiliary cam means that urges the holding hook to rotate to an active/non-active position via the roller by rotation of the cam.