JPH09166109A - Clamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp device to easily generate a crack and prevent the occurrence of breakage even when the clamp device is used on a severe vibration condition, and have excellent vibration durability. SOLUTION: A clamp device comprises a clamp body 1 wherein the two end sides of a belt-like strap 2 formed in an ring shape are folded back to the outside, the two end parts 3a and 3b thereof are respectively welded on the outer surface of a strap 2, and an opening part 8 is formed between folded back parts 4a and 4b; and a clamp auxiliary plate 11 disposed at the inner side of the clamp body 1 in such a manner to cover an opening part 8 and having one end side welded on the inner surface of the strap in such a state to front on the weld part on one side end part of the strap 2, and a reinforcing means 15 is welded to the weld part of the other end part 3b of the strap 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device for uniformly tightening hoses and ducts from the circumference,
More specifically, it relates to a clamp device that can withstand use even under severe vibration conditions.

[0002]

2. Description of the Related Art Conventionally, as a clamp device for uniformly and firmly tightening hoses and ducts from the circumference, although not shown, for example, as a typical example, both ends of an annular strap are folded back to the outside and both ends thereof are folded. The clamp auxiliary plate has an arc-shaped clamp body, which is welded to the outer surface of the ring-shaped strap, and has a clamp body having an opening formed in a part of the ring-shaped strap so as to cover the space between the openings of the folded-back portion of the clamp body. Is disposed from the inside, and one end side thereof is welded to the inner surface of the strap by facing one end welded portion of the strap.

When a hose, duct or the like is clamped by the clamp device having such a structure, the opening is elastically deformed and widened, the hose or duct is inserted into the clamp body, and a bolt is provided between the folded portions of the clamp body. By tightening with a nut, a tension is applied to the clamp body, and this tension is converted into a force in the centripetal direction to perform uniform tightening on the entire circumference.

[0004]

When the above-mentioned conventional clamp device is used for a hose or a duct of a rocket engine or the like having a strong vibration, both ends of the strap are folded back and welded to the outer surface of the strap. There was a problem that a crack was generated from the strap welding portion of the clamp body and the clamp body was damaged.

The object of the present invention is to prevent cracking and damage even when used under severe vibration conditions.
It is to provide a clamp device having excellent vibration durability.

[0006]

Therefore, the present invention provides the following means for achieving the above object. That is,
(1) Both ends of a belt-shaped strap formed in a ring shape are folded back to the outside, both ends are welded to the outer surface of the strap, respectively, and a clamp body having an opening between the folded portions, and the clamp body. In a clamping device having an arc-shaped clamp auxiliary plate, which is arranged to cover the opening on the inner side of the strap, one end of which faces the welded portion of the strap, and one end of which is welded to the inner surface of the strap,
There is provided a clamp device characterized in that a reinforcing means is welded to the other end welded portion of the strap.

Further, in the above (1), (2) the structure in which the reinforcing means is provided on the inner surface side of the strap, (3) the structure in which the reinforcing means is provided on the outer surface side of the strap,
(4) A configuration is provided in which the reinforcing means includes a flat plate-like reinforcing plate, and (5) a clamp device in which the clamp body, the clamp auxiliary plate, and the reinforcing means are all made of stainless steel.

Further, (6) both ends of a belt-shaped strap formed in a ring shape are folded back, both ends are welded to the respective straps, and a clamp body having an opening between the folded portions and the clamp. A clamping device having an arc-shaped clamp auxiliary plate, which is disposed inside the main body so as to cover the opening and has one end facing the one end welding part of the strap and one end of which is welded to the inner surface of the strap, At least the other end side of the strap is folded back inward and the end portion is welded to the inner surface of the strap.

Further, in the above (6), (7) a configuration in which the other end of the clamp auxiliary plate is extended to a terminal portion of the other folded back end of the strap, and (8) the other folded back end of the strap. A clamp device in which a reinforcing means is welded to a welded portion.

Further, in the above (8), (9) the reinforcing means comprises a flat reinforcing plate, and (1)
0) A clamp device is provided in which the clamp body, the clamp auxiliary plate, and the reinforcing means are all made of stainless steel.

The present invention is configured as described above, and in (1) to (3), since the reinforcing means is welded to the inner surface or the outer side of the strap at the other end welded portion of the strap, the other end welded. Similar to the one strap end welded part where the clamp auxiliary plate is welded, the part has a triple structure consisting of a folded part, a strap part and an auxiliary means, for stopping hoses and ducts in rocket engines etc. which have severe vibrations. Even if it is used, it is possible to give strength enough to withstand the vibration, cracks do not easily occur in the welded part, and therefore it is effective to peel off and damage the part. It can be prevented.

In addition, in (4) and (5), the reinforcing means is a flat plate, which facilitates processing, and the reinforcing means including the clamp body and the clamp assisting plate are made of stainless steel to provide elasticity. Since it has, the hose and the like can be easily inserted and tightened in the clamp body, and it has weather resistance and corrosion resistance, and maintains high strength.

In (6) and (7), at least the other end side of the strap is folded back inward, and the end portion is folded back and is extended to the middle of the end portion or the end portion to be welded to the inner surface of the strap. With only the structure in which the other end side of the strap is folded back to the outside and the end part is welded to the outer surface of the strap, when the reaction force of the tightening force acts, the fulcrum (fixed end) of the bending load is The nugget uses the base material of the strap as the fulcrum of the bending load due to the reaction force of the tightening force, so it is possible to increase the strength against the reaction force compared to the conventional one, and violent vibration is given. Even if it is done, cracks are not easily generated in the welded portion, and the effect is further enhanced as compared with the above-mentioned clamp device of (1).

In (8), since the reinforcing means is added in addition to the structure in which the end portion of the strap in (6) is folded back inward, the effect in the structure in (6) is further enhanced.
Make sure to prevent cracks.

In (9) and (10), the above (8)
In the above configuration, by using a flat plate as the reinforcing means, its processing is facilitated, and since the reinforcing means is made of stainless steel, including the clamp body and the clamp auxiliary plate, it has elasticity, It can be easily inserted and tightened with hoses, has weather resistance and corrosion resistance, and maintains high strength.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view of a clamp device according to a first embodiment of the present invention, and FIG. 2 is a front view thereof. In both figures, 1 is a clamp body, 1
Reference numeral 1 is a clamp auxiliary plate, and 15 is a reinforcing means. The clamp body 1 has a structure in which both ends of a belt-shaped strap 2 formed in a ring shape are folded outward, and both ends 3a and 3b are brought into contact with the outer surface of the strap 2 in the same shape and welded by spot welding or the like. ing.

The strap 2 is provided on the folded-back portions 4a and 4b.
Locking portion 5 having a substantially circular hollow portion along the width direction of the
a and 5b are formed respectively. One locking part 5a
Is provided with a head 6a of a T-shaped bolt 6, and a locking member 7 for locking the bolt 6 is provided on the other locking portion 5b. The bolt 6 engages with the locking member 7. I am fit.
The bolt 6 is formed in a slightly arcuate shape so as to follow the ring shape of the clamp body. In addition, this folded portion 4
An opening 8 is provided between a and 4b at a predetermined distance.

The clamp auxiliary plate 11 is formed by making a flat plate into an arc shape and is arranged inside the clamp body 1 so as to cover the opening 8. One end side 12a of the clamp auxiliary plate 11
Is welded to the inner surface of the strap by spot welding or the like, facing the welded portion of one end 3a of the strap. An outer surface of the other end side 12b of the clamp assisting plate 11 is in contact with at least the inside of the strap of the other folded-back portion 4b.

The reinforcing means 15 is a characteristic part of the present invention, and is composed of a reinforcing plate which is an arc-shaped planographic plate and can abut along the clamp body 1, and the other end of the strap 2. It is arranged at 3b. The reinforcing means 15 is welded and fixed to the inner surface side of the strap 2 at least over the entire welded portion of the end portion 3b.

The reinforcing means 15 may be provided at the end welded portion on the outer surface side of the strap 2 instead of the inner surface side. Moreover, in order to further increase the strength, it is preferable to provide the strap 2 on both sides of the inner and outer surfaces.

Reference numeral 9 is a tightening nut, which is a bolt 6
The head portion 6a is locked to the locking portion 5a, and is screwed to the screw portion 6b of the bolt 6 inserted into the through hole of the stopper member 7.
The T-shaped bolt 6 is arranged in an arc shape along the central portion of the strap 2 in the width direction, and the folded portion is provided via the head portion 6a of the locking portion 5a and the stopper member 7 of the locking portion 5b. An even load can be applied to 4a and 4b.

In the above-described clamp device, by tightening the nut 9, the interval between the openings 8 (the size of the ring of the clamp body 1) is narrowed, and the hoses and ducts disposed inside are clamped to the clamp body 1 and the clamp body 1. The auxiliary plate 11 can be tightened uniformly and firmly from the circumference.

That is, by tightening the nut 9, a tension is applied to the clamp body 1, and this tension is converted into a force in the centripetal direction. Since the clamp auxiliary plate 11 is arranged in an arc shape in the opening 8 of the clamp main body 1, the clamp main body 1 and the clamp auxiliary plate 11 can perform uniform clamping from the circumference.

Further, since the reinforcing means 15 is welded to the welded portion of the other end 3b of the strap 2, the end 3b is clamped even when it is used to stop hoses or ducts in a rocket engine or the like that violently vibrates. It has a triple structure similar to the welded portion of the strap end 3a on which the auxiliary plate 11 is welded, cracks do not easily occur at the welded portion, and very good results are obtained even when actually tested. Was given.

The clamp body 1 can be made of any conventionally known material as long as it is a high-strength metal formed so as to have an elastic force in view of clamping hoses and ducts. For example, stainless steel or the like having excellent weather resistance and corrosion resistance can be preferably used. The clamp auxiliary plate 11 and the reinforcing means 15 can be the same as the conventional one as long as they are high-strength metal. For example, stainless steel or the like is preferably used in terms of weather resistance and corrosion resistance as in the clamp body 1. be able to.

Next, FIG. 3 is a front view of a clamp device according to a second embodiment of the present invention. In the second embodiment, instead of providing the reinforcing means 15 in the clamp device of the first embodiment, the other end 3b of the strap 2 is provided.
The side is folded back inward so that the end portion 3b is along the inner surface of the strap 2, and the clamp assisting plate 11 is extended more than the first embodiment shown in FIG. 1 and is welded to the inner surface of the strap 2. . The other structure is the first shown in FIG. 1 and FIG.
It is the same as the form. Even in this case, the same effect as that of the first embodiment can be obtained.

That is, conventionally, as shown in FIG.
Since the other end 3a side of the strap 2 is folded back to the outside and the end 3a is welded to the outer surface of the strap 2, when the reaction force N of the tightening force from the article H is applied during use, The fulcrum of the bending load (fixed end) becomes the nugget of the welded portion W.

In such a state, cracks are likely to occur, and in the past, the strap end portion 3b did not have a triple structure, and the strength at the end portion 3b was insufficient when there was severe vibration. The first embodiment of the present invention in which the reinforcing means 15 is provided as shown is proposed.

On the other hand, in the second embodiment of the present invention, as shown in FIG. 4B, the fulcrum of the bending load due to the reaction force N of the tightening force is the base material of the strap 2. ,
The strength can be increased with respect to the reaction force N. Therefore, even if violent vibration is applied, cracks are not easily generated in the welded portion. In addition, since it can be manufactured with the same member as the conventional one without using other members, it does not cause an increase in cost and an increase in manufacturing process,
It has a greater crack prevention effect than the first embodiment.

In FIG. 3, the folded-back portion 4b has an arc-shaped portion 2x until it comes into contact with the end portion 3b of the strap 2 located on the outer side thereof. However, as shown in FIG. The strap portion 2x can also be formed in a linear shape.

As shown in FIG. 3, the clamp assisting plate 11 has the other end 12b at the other end 3 of the strap 2.
Although it may be extended to the end portion of b or halfway, it may be extended to the end portion as described above to cover the welded portion and end 3b.
It is preferable to have a triple structure in order to increase the strength of the welded portion.

Further, the reinforcing means 15 described in the first embodiment shown in FIGS. 1 and 2 may be welded to the welded portion of the end portion 3b of the strap 2, thereby further increasing the strength and cracking. Can be prevented.

In the above second embodiment, the end portion 3 of the strap 2 is
Although b is welded to the inner surface of the strap 2 to enhance the strength during use, one end 3 of the strap 2 is used.
It goes without saying that the side a may be similarly folded back inward and its end 3a may be welded to the inner surface of the strap 2 so as to increase the strength of the welded portions at both ends of the strap 2.

[0034]

As described above in detail, the present invention is characterized in that, in the clamp device having the clamp body and the clamp auxiliary plate, the reinforcing means is welded to the other folded-back end weld portion of the strap. Alternatively, since at least the other end side of the strap is folded back inward and the end portion is welded to the inner surface of the strap, the following effects can be obtained.

(1) It is possible to obtain a clamp device which is excellent in durability against vibration without cracks and being easily broken even when used under severe vibration conditions.

(2) Also, by folding the other end side of the strap inward and welding the end portion to the inner surface of the strap, it is possible to manufacture the same member as the conventional one without using any other member. Therefore, there is no increase in cost and increase in manufacturing process.

(3) A flat plate can be used for the reinforcing means, which facilitates the manufacture and also the strap body,
If stainless steel is used for the reinforcing means including the clamp auxiliary plate, the clamp device can have weather resistance, corrosion resistance, and high strength.

[Brief description of the drawings]

FIG. 1 is a perspective view of a clamp device according to a first embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a front view of a clamp device according to a second embodiment of the present invention.

4A and 4B are diagrams showing effects of the clamp device according to the second embodiment of the present invention, FIG. 4A is an explanatory diagram when a reaction force acts on a welding portion of a conventional clamp device, and FIG. It is explanatory drawing when a reaction force acts on the welding part of the clamp apparatus of FIG.

FIG. 5 is an explanatory view of a main part showing another example of the folded-back portion in the clamp device of FIG.

[Explanation of Codes] 1 Clamp body 2 Straps 3a, 3b Ends 4a, 4b Folded back portions 5a, 5b Locking portions 6 Bolts 7 Stopping members 8 Openings 9 Nuts 11 Clamp auxiliary plates 12a One end side 12b Other end side 15 Reinforcing means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masumi Gyokuya, Masumi Gotani, 36-11 Shinbashi, Minato-ku, Tokyo, Yokohama Rubber Co., Ltd. (72) Masahiro Atsumi 1200, Higashi Tanaka, Komaki City, Aichi Prefecture Mitsubishi Heavy Industries (72) Inventor Haruhisa Isogai 1200, Higashi-Tanaka, Komaki City, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Nagoya Propulsion System Factory

Claims (10)

[Claims] 1. A clamp main body having both ends of a band-shaped strap formed in a ring shape folded back to the outside, the both ends being welded to the outer surface of the strap, and an opening provided between the two folded parts, A clamp device, which is disposed inside the clamp main body so as to cover the opening, has an arc-shaped clamp auxiliary plate whose one end side is welded to the inner surface of the strap, facing one end welded portion of the strap, A reinforcing device is welded to the other end welded portion of the strap. 2. The clamp device according to claim 1, wherein the reinforcing means is provided on the inner surface side of the strap. 3. The clamp device according to claim 1, wherein the reinforcing means is provided on the outer surface side of the strap. 4. The clamp device according to claim 1, wherein the reinforcing means comprises a flat reinforcing plate. 5. The clamp device according to claim 1, wherein the clamp body, the clamp auxiliary plate, and the reinforcing means are all made of stainless steel. 6. A clamp main body having a loop-shaped band-shaped strap, both ends of which are folded back, and both ends of which are welded to the strap, and an opening is provided between the folded-back portions, and an inner side of the clamp main body. A clamp device having an arc-shaped clamp auxiliary plate that is disposed so as to cover the opening and that faces one end welded portion of the strap and has one end side welded to the inner surface side of the strap. The other end side of the above is folded back inward and the end portion is welded to the inner surface of the strap. 7. The clamp device according to claim 6, wherein the other end of the clamp auxiliary plate is extended to a terminal portion of the other end of the strap. 8. The clamp device according to claim 6, wherein a reinforcing means is welded to the other end welded portion of the strap. 9. The clamp device according to claim 8, wherein the reinforcing means comprises a flat reinforcing plate. 10. The clamp body, a clamp auxiliary plate,
9. The clamp device according to claim 8, wherein both the reinforcing means and the reinforcing means are made of stainless steel.