JP3030451B2 - Clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp used for connecting steel pipes such as temporary scaffolds and shelves.

[0002]

2. Description of the Related Art A clamp generally used in the prior art has a holder and one end of a holder pivotally connected. A base of a tightening bolt is pivotally connected to the other end of the holder and a U-shaped member is connected to the other end of the holder. In this structure, a bolt-like concave portion is formed, and the tip of a bolt is fitted into the concave groove, and a nut is screwed into the bolt to fasten the bolt.

[0003]

The conventional structure has a problem that a concave groove is formed at the tip of the holding body to cause a cross-sectional defect, resulting in insufficient strength and complicated processing. .

In order to solve the above problems, the inventor has previously developed a clamp disclosed in Japanese Utility Model Publication No. 57-18507. However, this inventor has further improved the clamp by using a bolt without providing a bolt insertion hole. The present invention is devised of a structure that can clamp the holder and can be applied to pipes having different sizes.

[0005]

According to the present invention, there is provided a clamp as a gist of the present invention. Both bases are pivoted,
A bolt 7 is screwed into the tip of the auxiliary holder 2.

The spherical portion at the tip of the bolt 7 has a spherical receiving recess A1 on the outer surface of the other end of the holding member 4 for a thick pipe, and a spherical receiving portion A1 on the other end of the holding member 4 for a thin pipe. The recess A2 is crimped, and the pipes are uniformly crimped and held by the hinges of the holding body 1, the holding body 4, and the auxiliary holding body 2.

[0007]

1 and 7 show a case of a thick pipe.
Shows an embodiment of a thin pipe.

In this clamp, one end of the holding body 1 and one end of the holding body 4 are pivotally connected by pins 5.

At the other end of the holding body 1, both bases of a groove-shaped auxiliary holding body 2 are pivotally connected by pins 3.
A nut 6 is fixed to the tip of the nut, and a bolt 7 having a spherical tip is screwed to the nut 6. It is to be noted that the nut 6 is not used, and the tip of the auxiliary holding member 2 is made thick, and a screw hole is formed in this end, so that the bolt 7 can be screwed. Spherical receiving recesses A1 and A2 are provided on the outer surface of the other end of the holding body.
Is formed.

In use, the periphery of the pipes B1 and B2 is surrounded by the holding body 1 and the holding body 4, the tip of the auxiliary holding body 2 is overlapped on the holding body 4, and then the bolt 7 is rotated to turn the tip of the bolt 7 on. To the receiving recesses A1 and A2 on the outer surface of the other end of the holder.

When assembling the two pipes at right angles or in parallel, the holding body 1 is used by being pivotally attached or fixed back to back as in the conventional case. Also this holding body 1
In some cases, various connection fittings may be attached to the vehicle.

This clamp forms an arc-shaped holding body and a holding body for a pipe having a circular cross section, and forms a holding body and a holding body for a pipe having a square cross section.

[0013]

According to the present invention, an auxiliary holding member having the above-described structure is provided, and a bolt is screwed to the tip of the auxiliary holding member. Since it is possible to perform pressure bonding, it is not necessary to provide a concave groove in the holder.

Therefore, there is no cross-sectional defect and there is no possibility of breakage during use. In addition, since the tip of the bolt and the receiving recess for holding are in contact with each other with a spherical surface, there is no problem in the rotational tightening of the bolt.

Since the holding body is provided with two receiving recesses, it can be safely and reliably applied to pipes of different diameters.

[Brief description of the drawings]

FIG. 1 is a front view of a clamp for a pipe having a thick circular cross section.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a left side view of FIG.

FIG. 5 is a front view of a clamp for a thin circular section pipe.

FIG. 6 is a bottom view of FIG. 2;

FIG. 7 is a front view of a clamp for a thick rectangular pipe.

FIG. 8 is a bottom view of FIG. 7;

FIG. 9 is a top view of FIG. 7;

FIG. 10 is a right side view of FIG. 7;

FIG. 11 is a front view of a clamp for a thin square section pipe.

FIG. 12 is a bottom view of FIG. 11;

[Explanation of symbols]

1 ... holding body, 2 ... auxiliary holding body, 3 ... pin, 4 ... holding body,
5 ... Pin, 6 ... Nut, 7 ... Bolt, A1 ... Recessed recess for thick pipe, A2 ... Received recess for thin pipe, B
1: thick pipe, B2: thin pipe

Claims (1)

(57) [Claims] An end of the holding body 1 and one end of the holding body 4 are pivotally connected, and both ends of the groove-shaped auxiliary holding body 2 are pivotally connected to the other end of the holding body 1.
Auxiliary retaining body bolts 7 to the tip of the 2 is screwed, characterized in that the spherical portion of the tip of the bolt 7 is formed by bonding the spherical receiving recess A1 or A2 of the two positions of the other end the outer surface of the抱着body 4 And clamp.