JPS641969Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Purpose of the invention ``Industrial application field'' The middle hook of the invention supports a heald rod that suspends a heald wire at its support part,
It moves up and down in conjunction with the opening and closing movement of the warp threads of the loom, and is designed to move the heald wire up and down via the heald rod.

``Prior Art'' The synthetic resin middle hook is narrow between the heald wires, and because it frequently moves up and down while supporting the heald rod, the rod supporting portion is subject to severe wear and tear. In order to cope with this, an attempt was made to embed a substantially annular bush made of a wear-resistant hard material and having a separate upper end in the heald rod support portion of the hook body.

``Problem that the invention aims to solve'' However, even though this button is embedded in the hook body, the hook body moves up and down extremely frequently, so while using it for a long time, The bush may easily come off from the hook body due to vibration or other factors. In addition, when supporting the held rod on the support part of the hook body, first,
The hook body is pushed up from below the held rod toward the held rod, the divided portion is pushed open by the held rod, and the rod is slid into the support portion. However, as the hook becomes older, during this operation, when the hook body is pushed open at the split part, the button and the hook body separate as shown in Figure 6, and only the hook body opens, and the upper end of the button accepts the rod. This will cause the inconvenience of not being able to open properly, and this should be avoided.

(b) Structure of the invention ``Means for solving the problem'' In the present invention, a protrusion is provided on the outer center of the bushing, and the end of the protrusion is connected to the upper cutout part of the bushing. At a position slightly set back from the hook, the end portion is rounded up almost vertically, in other words, the end portion is formed approximately parallel to the vertical dividing line of the hook.

"Function" In the present invention, the hook body and the bushing become one body due to the protrusion of the bushing as described above.
That is, the protrusions can sufficiently resist the force applied in the thickness direction of the hook body, and the bush and the hook body will not separate. Furthermore, since the end of this protrusion stops at a distance S retreating from the cut, the meat of the hook body is completely filled between the cut and the end of the protrusion. Since the ends of the strips are cut up in the vertical direction, when the split portion is about to be expanded as described above, the flesh of the hook body, which is completely filled, is against the vertical end surface of the protruding strips. Since the push is applied with sufficient force, the bush is opened integrally with the hook body (see FIG. 5), and the rod can be smoothly accommodated in the support.

``Example'' The present invention is a well-known synthetic resin middle hook which has a supporting part 1 of the held rod R at the lower part and is divided 2 from the upper end of this supporting part to the upper end of the middle hook main body M, but the upper part is divided. is,
A protrusion 4 which is rounded up almost vertically at a position recessed by an amount S from this dividing part 3
However, the wear-resistant hard material 5 (for example, polycarbonate containing carbon) provided at the center of the outside
This is similar to the middle hook of a weaving device in a loom, which is embedded inside the support part 1.

6 in the figure represents a heald wire, and the same or equivalent parts in the figure are given the same reference numerals.

(c) Effect of the invention ``Effect of the invention'' If you simply embed a bushing inside the insertion support part 1 of the held rod, if a special force is applied to the middle hook in the direction of its thickness, there will be damage between the bushing and the main body. This is an inconvenience because it causes slippage and tends to separate the two after long-term use.However, in the case of the present invention, the protrusions are provided in the state described above, so they are not affected by the force in the thickness direction. On the other hand, this protrusion prevents the above-mentioned slipping from occurring. Also, when the hook body is pushed up while being expanded by the held rod, there is a lot of meat between the end of the protrusion and the main body, so this thick part can be used to hold the end of the protrusion that is rising almost vertically. As a result, the button is pushed, and the button expands completely as one with the hook body (see Figure 5).
The rod slides into the support very smoothly and does not cause any inconvenience. Needless to say, from the above, it is clear that the middle hook of the present invention is highly durable.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the hook of the present invention, (section taken along Y-Y in Fig. 2) Fig. 2 is a sectional view taken along Fig. 1 XX, and Fig. 3 shows the hook and its FIG. 4 is a perspective view showing the main parts of the bush according to the present invention. FIG. 5 is an explanatory diagram of the present invention when the supporting part is expanded. FIG. It is an explanatory diagram of a similar situation in a product. 1...Held rod support part, 2...Vertical division of the hook body, 3...Divided part of the upper part of the bush, 4
... Protrusion provided on the outside of the bush, 5... Bush, S... Distance from the dividing line of the hook to the vertical surface of the end of the protrusion, M... Hook body, R... Held rod.

Claims (1)

[Scope of utility model claims] In a synthetic resin middle hook which has a heald rod support part 1 at the lower part and is divided into two parts from the upper end of this support part to the upper end of the middle hook main body M, the upper part is divided and both ends are set back from the divided part 3 by an amount S. A weaving device for a loom in which a wear-resistant hard material 5 is embedded inside the support portion 1, and a protrusion 4 having a substantially vertically cut-up shape is provided at approximately the center of the outside. Middlefish.