JPH08270737A - Ring-shaped body with connecting structure - Google Patents

Abstract

PURPOSE: To provide a ring-shaped body, which is free from necessity of welding, freely assembled/removed, and produced easily at low cost, for a ring-shaped body which can constitute a chain and the like. CONSTITUTION: A metal frame body, which is formed into a ring shape and is provided with a spring characteristic, is folded at its substantial center in two, and on one side 3 in two-fold parts 2 overlapping each other, the first projection 7 extending to the vicinity of a frame part, 6 on the opposite side is formed in one side frame part 5, while on the other side 4 of the two-fold parts 2, the second projection 10 which overlaps the first projection 7 and extends to the vicinity of a frame part, 9 on the opposite side is formed in the other side frame part 8 facing the first projection part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular body having a connecting structure which can be constructed without welding, for example, a chain.

[0002]

2. Description of the Related Art For example, when considering a chain, conventionally, a large number of wire rods are bent into a C-shape, and after connecting them, they are assembled by welding in an annular shape. In this case, the above welding is indispensable, and the time and labor required for this welding process cannot be omitted. Further, the above-mentioned conventional chain cannot be separated after being welded once,
The only way to adjust the length was to cut.

[0003]

DISCLOSURE OF THE INVENTION The present invention addresses the above situation, and by discovering a novel connecting structure in an annular body, does not require welding, can be dissociated, and is simple and inexpensive. It is intended to provide an annular body.

[0004]

That is, the feature of the annular body of the present invention which meets the above-mentioned object is that a metal frame body having a spring property formed in an annular shape is folded in two at approximately the center and polymerized, and the above-mentioned two-folded structure is formed. On one side of the portion, a first projecting portion that extends to the vicinity of the other frame portion is formed on one of the opposing frame portions, and on the other side of the half-folded portion, the side that faces the first projecting portion. The second protrusion is formed on the frame portion so as to overlap with the first protrusion and extend to the vicinity of the opposing frame portion.

[0005]

In the above-mentioned annular body of the present invention, by opening the above-mentioned two-folded portion in the direction in which the protrusions are separated from each other, a gap for incorporating another annular body is formed. Returns to the polymerized state to prevent the other annular body from coming off. Further, when releasing the connected annular bodies, by opening the protrusions in the same manner as described above, it is possible to easily separate the annular bodies without cutting the annular bodies.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an annular body of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a view in the direction of arrow B of FIG. 1, and FIG. FIG. 5 is a plan view showing the frame body, and FIG. 5 is an enlarged perspective view of the protrusion.

The annular body of the embodiment of the present invention is shown in FIGS. 1 and 2 by folding an elliptic metal frame body 1 having a spring property as shown in FIG. Thus, they are formed so as to overlap with each other with almost no gap.

On one side 3 of the above-mentioned two-folded portion 2, a first protrusion 7 extending to the vicinity of the other frame portion 6 is formed on one of the opposing frame portions 5, and the above-mentioned one. Two
On the different side 4 of the folded portion 2, the first protrusion 7 is formed.
A second protrusion 10 is formed on the frame 8 on the side facing the first protrusion 7, which overlaps with the first protrusion 7 from the tip to the middle and extends to the vicinity of the opposing frame 9.

The overlapping of the first and second protrusions 7 and 10 does not necessarily have to be in contact with each other as shown in the figure. Further, regarding the shapes of the first and second protrusions 7 and 10, the portions 7a and 10a corresponding to the inner side of the annular body are bent at the bending line L.
It is suitable to be substantially parallel to, that is, substantially 90 ° with respect to the pulling direction H shown in FIG.

On the other hand, FIGS. 6 to 8 show an annular body for a spring structure of a nuclear fuel rod to which the structure of the present invention is applied, and leg seats 11 are integrally formed at both ends as shown in FIG. The elliptic spring-like metal frame 1'is folded in two along the central bending line L to be polymerized, and the metal frame 1'is also formed.
Are bent 90 ° along the bending line L ′ at the base of the leg seat 11 to form the shape shown in FIG. In this case, for the purpose of increasing the bonding strength, the projections 7b are returned to the projections 7 and 10, respectively.
10b is provided. The leg seats 11 may be welded at their abutting portions.

As the annular body of this embodiment, another same one is used, and by combining these with the projections 7 and 10 so as to open the overlapping, the coil spring 12 as shown in FIG. 8 is compressed. A spring structure that is loaded and mounted can be created very easily.

That is, in the annular body of each of the above-described embodiments of the present invention, by opening the double-folded portion 2 in the direction of separating the protrusions 7 and 10 from each other, a gap for incorporating another annular body is formed and incorporated. After that, due to the spring property, the protrusion 7,
10 returns to the polymerization state to prevent the other annular body from being separated. Further, when releasing the connected annular bodies, the protrusions 7 and 10 may be opened in the same manner as described above.

As shown in FIG. 8, the assembled annular body is connected so as to cross the original annular body. Therefore, the pulling force of these annular bodies is increased by the protrusions 7, 10.
It will be hung on the inner part of the annular shape of, and usually the connection between the two cannot be easily released.

In the above annular body of the present invention, however, the original frame bodies 1 and 1'are punched out from a metal plate by pressing or the like.
The production is completed by simply folding the frame bodies 1 and 1'into two, and it is possible to easily and inexpensively provide an annular body which does not require welding and which can be freely connected and disconnected.

Although the embodiment of the present invention has been described above, the annular body of the embodiment can be connected to another annular body by expanding the protrusions 7 and 10 in the facing direction. .

[0017]

As described above, in the annular body having the connecting structure of the present invention, the metal frame body having the spring property formed in an annular shape is folded in two at substantially the center and polymerized to form one side of the above-mentioned two-folded portion. In one of the frame portions facing each other, a first projecting portion extending to the vicinity of the other frame portion is formed, and at the other one side of the half-folded portion, the frame portion on the side facing the first projecting portion. And a second protrusion extending to the vicinity of the opposite frame portion is formed by overlapping with the first protrusion.
By opening the folding part in the direction of separating the overlap of the protrusion, other annular bodies can be incorporated or released without cutting or welding, and the annular body can be pressed from the metal plate by pressing etc. The preparation is completed by punching out the original frame body and folding this frame body in two, and as mentioned above, it provides a simple and inexpensive annular body that does not require welding and can be connected and disconnected freely. It has a remarkable effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an annular body according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a view on arrow B in FIG.

FIG. 4 is a plan view showing a frame body before bending.

FIG. 5 is an enlarged perspective view of a protrusion.

FIG. 6 is a plan view showing a frame body before bending according to a second embodiment of the present invention.

FIG. 7 is a front view showing the annular body according to the embodiment.

FIG. 8 is a front view of a spring structure using the annular body of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 2 folding part 3 One side of 2 folding part 4 Other side of 2 folding part 5, 6 Frame part 7 1st protrusion part 8, 9 Frame part 10 2nd protrusion part 11 Leg seat 12 Coil spring

Claims (1)

[Claims] 1. A ring-shaped metal frame body having a spring property is folded in two at substantially the center and polymerized, and on one side of the above-mentioned double-folded portion, one frame portion facing the other extends to the vicinity of the other frame portion. In the vicinity of the opposite frame portion, which forms the protruding first protrusion and is overlapped with the first protrusion on the frame portion on the side facing the first protrusion on the other side of the half-folded portion. A ring-shaped body having a connecting structure, characterized in that a second protrusion extending up to is formed.