JP3367559B2 - Loom shedding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shedding device for a loom, and more particularly, it includes a wire rope locking member fixed to a swing lever in a shedding mechanism and connected to a heald frame at one end. The other end of the wire rope
The guide groove formed in the wire rope locking member is curved and guided in the extension direction of the rocking lever, and the locking member is provided on the tip side of the portion guided by the arc guide groove. The present invention relates to improvement of a wire rope locking technique in an opening device having a structure to be locked against.

[0002]

2. Description of the Related Art Generally, a wire rope (or a wire cable) is used in a shedding device of a loom to transmit an operation of a shedding mechanism to a heald frame. One end of the wire rope is attached to the heald frame. While being connected, the other end is locked to a swing lever in the opening mechanism, such as a cam lever or a guide lever. However, there are not a few accidents in which the wire rope is disengaged from the engagement with the swing lever due to loosening and vibration due to tension fluctuations of the wire rope accompanying the movement of the heald frame during the opening movement. When the wire rope disengages from the rocking lever in this way, the operation of the opening mechanism is not accurately transmitted to the heald frame, which causes the opening device to malfunction, leading to defective products such as the fabric. Become.
Therefore, various proposals have heretofore been made in order to prevent such engagement and disengagement of the wire rope from the swing lever.

The under-motion device for a dobby loom disclosed in Japanese Utility Model Publication No. 63-8783 is an example. In this prior application, a lever is provided with an arc portion for guiding the wire rope, a guide groove is formed on the outer periphery thereof, and a U-shaped wire rope detachment preventing rod is provided outside the arc portion.

In the opening device disclosed in Japanese Unexamined Patent Publication No. 3-124836, a locking connecting tool is provided in the tangential direction of the cam lever, and the other end of the wire rope connected to the heald frame is locked at the other end. The wire rope and the guide groove are connected to each other by a structural relationship such that the straight portion of the wire rope becomes a tangent line of the guide groove.

Further, in the opening device disclosed in Japanese Utility Model Laid-Open No. 59-37378, a wire rope having an arc-shaped groove centered on the swing center of the opening lever and having one end connected to a heald frame is provided. The groove is engaged.

[0006]

In any of the above-mentioned prior arts, each wire rope has its own effect of preventing engagement and disengagement of the wire rope. However, during the opening movement, a shocking force may be applied from the rising and falling heald frame to the locking part of the wire rope, especially to the swing lever, for various reasons.
This often breaks the locking portion of the wire rope. Therefore, in each of the above-mentioned prior arts, there is a measure for preventing engagement and disengagement of the wire rope, and a locking method for locking the end portion of the wire rope due to the impact force during the opening movement. Measures to prevent damage to the parts are not taken at the same time.

An object of the present invention is to prevent damage to a wire rope locking portion due to an impact force generated during shedding motion in a loom, and to loosen the wire rope due to tension fluctuations generated during shedding motion. The purpose is to prevent the wire rope from being disengaged from the swing lever.

[0008]

Therefore, according to the present invention, the wire rope fixed to the swing lever in the opening mechanism via the bracket and connected to the heald frame at one end is provided at the other end. A wire rope locking member to be locked is provided, and an arc-shaped guide groove for guiding the wire rope while turning it, and the wire rope is locked at the other end side of the wire rope with respect to the arc-shaped guide groove. In the opening device of the type in which the straight line portion is formed, the bracket is provided at a position facing the arc-shaped guide groove, and the wire rope is not always separated from the guide groove when the swing lever swings. The gist of the present invention is that a pressure welding unit for pressing the rope into the guide groove is attached.

[0009]

[Function] Even if an impact force is generated during the opening movement, transmission of this impact force is blocked at the wire rope pressure contact portion by the pressure contact member, and the impact force to the locking member that locks the end portion of the wire rope is mitigated. To be done. Even if the wire rope becomes loose due to the tension fluctuations that occur during the opening movement, the wire rope is always pressed by the pressure contact member, so the wire rope swing lever may also be disengaged from the guide groove. To be prevented.

[0010]

1 is an example of an opening device according to the present invention. The wire rope 6 whose one end is connected to the heald frame 7 is connected to the opening mechanism 10 which is a main part of the opening device via the guide pulley 9. This opening mechanism 10
Is attached to the frame 8 of the loom, and includes the swing lever 3, the wire rope pressure welding unit 4, and the wire rope locking member 1.
And are the main components.

As shown in FIG. 2, the wire rope locking member 1 is fixed to the swing lever 3 via a bracket 2. The wire rope locking member 1 is formed with an arc-shaped guide groove 1a, and the wire rope 6 guided from the guide pulley 9 has a guide groove 1a on the other end side.
Is guided by being bent downward along the extending direction of the rocking lever 3, and the tip portion thereof is further guided by the rocking lever 3.
It is guided so as to extend in a direction away from. Further, the wire rope locking member 1 is integrally formed with a locking portion 5 for locking the wire rope at an end portion in the extending direction of the wire rope 6. And the guide groove 1a
The end portion of the wire rope 6 guided along is locked to the wire rope locking member 1 by a bolt at the wire rope locking portion 5. The other end of the wire rope 6 guided along the guide groove 1a is locked to the wire rope locking member 1 at the locking portion 5 by a bolt or the like. The locking portion 5 of the wire rope locking member 1 is not limited to being integrally formed with the wire rope locking member 1, but may be formed separately and supported by the bracket 2. Good.

Further, as shown in FIG. 3, a wire rope pressure welding unit 4 is attached to the bracket 3. The wire rope crimping unit 4 has a U-shaped crimping piece 41, and the crimping piece 41 has a guide groove 1 a of the wire rope locking member 1.
The pressure contact spring 43 that presses the pressure contact spring 43 and the adjusting bolt 44 that adjusts the pressing force of the pressure contact spring 43 are provided, and the entire pressure contact unit 4 is mounted on the bracket 2 by the mounting piece 42 that engages with the side hole of the bracket 2. It is fixedly attached to 2.

In such a structure, when the wire rope 6 is locked to the locking member 1, the pressure contact piece 4 of the pressure contact unit 4 is pressed.
1 is urged by the spring 43 to guide the wire rope 6 into the guide groove 1.
Press against a. The press contact position in this case is a portion guided by an arcuate guide groove including a portion where the wire rope is curvedly guided along the swing lever, and is always guided when the swing lever 3 swings. Set it at a position where it will not separate from the groove.

[0014]

Even if an impact force is generated during the opening movement, the impact force is prevented from being transmitted at the wire rope pressure contact portion by the pressure contact member, and is not transmitted to the portion where the wire rope is locked to the rocking lever. Therefore, since the impact force to the locking portion that locks the rocking lever of the wire rope due to the impact force is mitigated, the damage to the locking portion that locks the end portion of the wire rope due to the impact force is effective. Be prevented. In addition, the above-mentioned pressure contact member has a position where the wire rope does not always come out of the guide groove even if the wire rope is loosened due to the tension fluctuation generated during the opening movement, that is, the length of the wire rope changes during the opening movement. Since the wire rope is pressed into contact with the guide groove of the swing lever at a position where there is no influence, engagement and disengagement of the wire rope from the swing lever is also prevented.

[Brief description of drawings]

FIG. 1 is a front view showing an example of an opening device according to the present invention.

FIG. 2 is a partially cutaway side view showing a main part of the opening device.

FIG. 3 is a perspective view of the same main portion.

[Explanation of symbols]

1 Wire rope locking member 2 bracket 3 Swing lever 4 Wire rope pressure welding unit 5 Locking part 6 wire rope 7 heald frame 8 loom frame 10 Opening mechanism 11 Guide pulley

Claims (2)

(57) [Claims] 1. A is fixed via a bracket to the swing lever during opening mechanism, a wire rope engaging member to be engaged by the tip of the wire rope connected to the heddle frames in one end the other end comprising Rutotomoni, while turning the wire rope
The arc-shaped guide groove for guiding and the arc-shaped guide groove
The wire rope is locked at the other end of the wire rope
A type of a linear portion is formed, the bracket is provided at a position facing the arcuate guide grooves, the wire rope during the swing of the swing lever is not always detached from the guide groove position Dewa Iyaropu opening device of the loom, characterized in that it is set with pressure unit for pressing the to guide grooves. 2. The apparatus according to claim 1, wherein the wire rope pressing unit includes a pressing piece for pressing the wire rope into the guide groove and a means for adjusting the pressing force.