JPS583057B2 - Shuttle braking device in loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shuttle braking device provided in a shuttle box of a loom.

In a loom, reliably stopping the shuttle in a predetermined position is extremely important for stable weft insertion, and various shuttle braking devices have been developed.

However, as we see today, as shuttle looms become faster and more packaged, and various developments are made, the conventionally known shuttle braking devices do not have sufficient functionality for shuttle braking. As a result, the stopping position becomes unstable, the flying force of the shuttle decreases due to backlash of the shuttle, the quality of fabric decreases due to tube change errors or shuttle scissors, and parts This causes various defects such as breakage of the weft, which greatly impedes the weft insertion function.

That is, in conventional shuttle braking devices, a swell placed in a shuttle box is biased at both ends by a shuttle braking spring, or the anti-woven fabric side of the swell serves as a rotational fulcrum, and the woven fabric side end is pressed against the shuttle. This structure is biased by a braking spring.

In all of these conventional devices, the woven fabric side of the swell, that is, the side that the shuttle first contacts, is biased by a shuttle braking spring. It pivots significantly backwards using the side as a fulcrum.

This conventional device is based on the idea that the shuttle is strongly braked by the impact when it enters the shuttle, and while the loom was operating at a relatively low speed, the braking function was effective, but as the shuttle's flying speed increases. As the shuttle enters, the impact with the swell increases, and this impact force has a greater ability to bounce the swell than brake the shuttle.Moreover, because the shuttle speed is high, the shuttle is braked by the collision at the beginning of the shuttle entry, and then It enters the shuttle box without receiving much of the braking force at the intermediate point.

As a result, poor braking of the shuttle occurs, resulting in various defects as described above.

The present invention has changed the concept of shuttle braking in conventional devices, and constitutes a braking device that has a so-called wedge-type braking function so that the braking force is sufficiently exerted at the intermediate point and at the completion of shuttle entry, rather than at the beginning of shuttle entry. This enables stable and reliable braking of the shuttle and eliminates the defects of the conventional device.

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 is a plan view showing the shuttle box portion on the left side of the race 1.

A front guard 2 is fixedly disposed on the front side of the race 1.

A swell 4 is disposed on the pack side of the lace 1 adjacent to a rotatable back guard 3, and its most forward position is regulated by pins 5 and 27 fixed on the lace 1.
This prevents the swell 4 from moving laterally.

Note that the pin 6 fits into a long hole I formed in the swell 4.

Further, blind holes 8 and 9 are provided at both ends of the swell 4, namely the woven fabric side and the non-woven fabric side, respectively, and a spring 10 is provided inside the blind holes 8 and 9.
11 are installed inside.

These springs 10 and 11 have a biasing force necessary to hold the shuttle 12 in a stable state during shuttle action, and always bias the swell 4 forward.

A swell control rod 13 is rotatably arranged behind the race 1 and rotates forward via a lever 14 and a rod 15 only when the shuttle is braked.

The base end of the press lever 16 is loosely fitted onto the swell control rod 13 on the non-woven fabric side of the swell 4, and a control pin 21 fixed to the rod 13 engages with a part of the press lever 16. It is stretched out.

The pressing lever 16 passes through its center and is biased toward the swell 4 by a strong spring 18 for braking the shuttle provided on a rod 17 fixed to a part of the race 1, but it is integral with the pressing lever. The forward position of the race 1 is regulated by the tip of the adjustment pin 19 provided at the rear surface of the race 1 coming into contact with the rear surface of the race 1.

Further, the upper end of the pressing lever 16 corresponds to the pressing plate 20 provided opposite to the opening of the blind hole 9 on the anti-woven fabric side of the swell 4,
The swell 4 can be biased via the pressing plate 20.

The pressing plate 20 locks the other end of the shuttle holding spring 11 housed in the blind hole 9, while the pressing lever 16 is mounted on the swell control rod 13 on the woven fabric side of the swell 4. The base end of the stopper 22, which has almost the same shape, is loosely fitted.

The stopper 22 passes through its center and is prevented from rotating backward by a spring 24 provided on a rod 23 fixed to a part of the race 1, and the forward biasing force by the spring 24 is applied to the stopper 22. This is prevented by the tip of the adjustment pin 25 provided integrally with the race 1 coming into contact with the rear surface of the race 1.

This spring 24 is extremely strong compared to the shuttle braking spring 18, and can keep the stopper 22 in a nearly fixed state, so that when the stopper 22 receives a strong impact,
The stopper 22 can be elastically configured to help alleviate this impact force and eliminate its influence on others.

The upper end of the stopper 22 corresponds to a receiving plate 26 provided opposite to the blind hole 8 on the fabric side, and the receiving plate 26 locks the other end of the shuttle holding spring 10 installed in the blind hole 8. Therefore, it comes into contact with the upper end of the stopper 22 due to the biasing force of the spring 10.

The stopper 22 is disposed with a predetermined distance from the rear surface of the swell 4 via a receiving plate 26, and as shown in FIG. A gap S is created between the swell 6 and the swell 4.

That is, there is no pressing action on the swell 4 by the spring 24 at all.

Next, the shuttle control operation of the present invention will be explained based on FIGS. 3 and 4.

When the shuttle 12 launched from the opposite shuttle box reaches the other shuttle box as shown in FIG. 3, the shuttle 12 collides with the swell 4 and the woven fabric side portion of the front guard 2 at the beginning of entering the shuttle.

The impact at this time causes the swell 4 to rotate largely counterclockwise around the pin 27.

However, after the swell 4 rotates a little, the woven fabric side portion collides with the stopper 22, and further rotation is prevented.

Therefore, the swell 4 assumes an angle regulated by the pin 6 and the stopper 22 at the maximum rotation position, and the shuttle contact surfaces of the front guard 2 and the swell 4 form a so-called wedge shape that narrows in the direction of movement of the shuttle 12. do.

Therefore, as the shuttle 12 approaches, the shuttle braking spring 18
The biasing force increases gradually, and at the most advanced position, the vehicle receives the strongest braking force and comes to rest in the state shown in FIG.

As shown in FIG. 3, when the swell 4 that bounces back due to the collision with the shuttle 12 at the initial stage of shuttle entry comes into contact with the stopper 22 and is prevented from rotating, the impact on the stopper 22 is absorbed by the spring 24. , it is not transmitted to other parts of the machine.

As described above, the shuttle braking device according to the present invention completely prevents the swell from bouncing back due to collision with the entering shuttle, thereby forming the swell into a wedge shape with the narrow side biased by the shuttle braking spring. However, no matter how much the flying speed of the shuttle increases, the shuttle braking force gradually increases as the shuttle enters the shuttle box, and the strongest braking force is applied at the most advanced position of the shuttle. It can be reliably stopped in position and the most stable shuttle control operation can be performed.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a shuttle box in which the present invention is implemented, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIGS. 3 and 4 are schematic plan views illustrating the functions of the present invention. . 1: Lace, 4: Swell, 10, 11: Shuttle holding spring,
18: Shuttle braking spring, 22: Stopper.

Claims (1)

[Claims] 1 In the shuttle box formed at the end of the race 1, an elongated hole 7 extending in the front-rear direction of the race 1 is bored in the swell 4, and a pin of approximately the same diameter is installed in the elongated hole 7 and is hung vertically on the race 1. 6 is fitted to prevent the swell 4 from moving in the lateral direction, relatively weak shuttle holding springs 10 and 11 are arranged at both ends of the rear side of the swell 4, and the swell 4 is attached to the inside of the shuttle box. Race 1
The movement of the swell 4 inward to the inside of the shuttle box is restricted at both ends of the front side of the swell 4 by pins 5 and 27 vertically installed at predetermined positions on the top, and a swell control device is provided on the non-woven fabric side of the swell 4. A pressing lever 16 is provided which is rotated to the swell 4 side only when the shuttle is entered, and the pressing lever 16 is biased by a shuttle braking spring 18 that is stronger than the shuttle holding spring 10. A predetermined distance S is provided on the woven fabric side of the swell 4 relative to the back surface of the swell 4 when the shuttle is housed in the shuttle box, so that the swell 4 is allowed to rotate slightly around the anti-woven fabric side. A shuttle braking device for a loom, characterized in that an elastic stopper 22 biased by a spring 4 stronger than the shuttle braking spring 18 is disposed.