JPS6269850A - Shuttle controller in loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of Application in Irregular Industry) This invention relates to a reed control device for Ra, and more specifically to an improvement in a loom of the type that retracts the reed during weft beating immediately after a weft insertion failure. It is.

In the following description, r front and back 1 refers to the warp direction, and r front and back 1 refers to the side closer to the fabric.

[Prior art and its problems]

When a weft insertion defect occurs in a loom, it is necessary to remove the defective weft yarn. However, even if a weft insertion error occurs, the loom does not stop immediately and rotates due to inertia, so the defective weft yarn is driven into the fabric front with the same weft striking force as during normal operation. In order to avoid such inconvenience that it is difficult to remove defective weft yarns, it has already been done to move the reed back from the normal operating position when weft beating immediately after defective weft insertion, and the applicant himself has already attempted to do so. We have filed an application for a proposal. That is, in the proposal of this prior application, a race supporting the reed is provided in a groove in the head of the sleigh sword so as to be movable back and forth, and during normal operation, the first pressing force resists the second pressing force. The lace is pressed against the front wall of the groove, and the reed is moved backward by removing the pressing force of 5Sl during weft striking immediately after weft insertion failure.

However, in the proposal of this prior application, since the first and second pressing forces are opposed to each other, there is a drawback that energy loss is large. In addition, since an elastic body such as a spring is used to obtain the first pressing force, when a weft insertion failure occurs, the elastic body will succumb to the inertial force of the reed and vibrate, making it difficult to reliably retreat the reed. There is also a drawback.

(Means for Solving the Problems) In this invention, a fluid pressure piston mechanism is connected to the race, and its action presses the race against the front wall of the concave groove during normal operation. This is to release this river stone state at the time of the stroke.

(Embodiment) In FIG. 1(A), the left side is the front, that is, the front of the fabric. A concave groove 2a is formed on the upper surface of the slay sword head 2, whose lower end is M-fitted onto a locking shaft (not shown). Further, a guide pin 6 is provided so as to cross in the front-rear direction near the bottom of this groove 2a, and its tip is screwed onto the slay sword head 2. The race 4 is accommodated in the groove 2a in a state where it is loosely attached to the guide bin 6. The lower part of the reed H is placed in the groove formed on the upper surface of the race 4.
It is fixed by 8. That is, the reed H can be moved back and forth with respect to the sleigh sword head 2 together with the race 4.

A fluid pressure piston mechanism IO is installed inside the rear wall of the groove 2a. Cylinder 1 of this fluid pressure piston mechanism lO
The tip of the piston 1 which reciprocates back and forth within the piston 2 is fixed to the race 4. The piston chamber in the cylinder 12 is connected by a wave channel 16.18 to a hydraulic control circuit (not shown). This fluid pressure control circuit has an electromagnetic directional switching valve, and controls the flow of fluid into and out of the fluid pressure piston mechanism 10 as appropriate in response to a detection signal of the occurrence of a weft insertion failure.

Hydraulic pressure, which is the most universal type of fluid pressure, is used.

During normal operation, fluid is fed into the cylinder 12 from the flow path 18, and the piston 1 moves to the left to press the race 4 against the front wall of the groove 2a, so that a normal weft striking force can be obtained.

When a weft insertion failure occurs, a detection signal enters the fluid pressure control circuit and the electromagnetic directional control valve operates to send fluid through the flow path 16 and remove fluid through the flow path 18. As a result, the piston 1 moves to the right and races. 4 leaves the @ wall of the groove 2a. That is, when the reed H has finished processing the zero weft yarns that are retreated from the position during normal operation, the fluid pressure control circuit once again sends fluid through the flow path 18, and at the same time, the fluid is removed through the flow path 16, and the piston 1] moves to the left, and the race 4 is pressed against the front wall of the groove 2a again.

In the device shown in FIG. 1(B), a hydraulic piston mechanism 20 is provided within the front wall of the groove 2a. The hydraulic piston mechanism 20 has a cylinder 22 and a piston 24 and is connected to the hydraulic control circuit described above by a flow path 26.2B. The action is essentially the same as that shown in Figure 1(A), only the movement of the piston is reversed from that in Figure 1(A) because the flow of fluid in and out is reversed. .

The device shown in FIG. 1(C) is provided with a fluid pressure piston mechanism 1O120 in the front and rear walls of the groove 2a, and its function is substantially the same as that described above. Only the flow of fluid in and out of the piston mechanism is reversed.

1Js1 The apparatus shown in FIG. 1(D) is substantially the same as that in FIG. 1(C).
, but each piston 1]. 24
The tip is not fixed to the race 4, but simply fits into the groove of the race 4.

In the example described above, the race 4 is moved back and forth in the groove 2a of the lace sword head, but in the device shown in Fig. 2, it is made to swing back and forth. Yes. That is, a support shaft 5 is provided in the groove 2a in the left-right direction, and a race is fitted onto the support shaft 5 ift. In addition, the tip of the piston 1 of the fluid pressure piston mechanism 10 becomes a sphere 1]a, which is engaged with the eroded wall of the race 4 [0].
Functionally, apart from the fact that the race 4 swings, it is similar to that shown in Figure 1 (
It is substantially the same as that in A).

(Effects of the invention) Since opposing pressing forces are not used, there is less energy loss. Also, since the reed is actively retreated by the action of the fluid pressure piston mechanism, vibration is reduced due to the inertial force of the reed. does not occur, is operationally certain,
The defective weft can be easily disposed of without driving the weft inserted into the shedding with a reed when the weft is defective in weft insertion.

[Brief explanation of drawings]

FIGS. 1(A) to 2(D) and FIG. 2 are partially sectional side views showing embodiments of the present invention. H-11 reed 2-m-sleigh sword head 4-m-race 10.20-m-hydraulic piston mechanism 1]. 24-m-Piston Patent Applicant 1e I'JJ @ Kogyo Co., Ltd. Patent Issuance Agent Masu Kan Atsushi - Part Figure 1 (A) 2 Figure 1 (D)

Claims (1)

[Scope of Claims] [1] A race that supports the reed is provided in a groove in the head of the sled sword so that it can move back and forth, and the action of a hydraulic piston mechanism connected to the race allows the reed to be moved normally. A reed control device for a loom, characterized in that the lace is pressed against the front wall of the concave groove during operation, and the pressed state is released at the time of weft striking immediately after a weft insertion failure. [2] The device according to claim [1], wherein the hydraulic piston mechanism is provided within the front wall of the concave groove of the slay sword head. [3] The device according to claim [1], wherein the hydraulic piston mechanism is provided within the rear wall of the concave groove of the slay sword head. [4] The device according to claim [1], wherein the hydraulic piston mechanism is provided in the front and rear walls of the groove of the slay sword head.