JP2819286B1 - Fastening clamp - Google Patents

Abstract

An object of the present invention is to provide a large number of tough and lightweight fasteners at a low cost by forming a main body of a fastener for fastening and clamping a plurality of members by performing three-dimensional sheet metal processing. SOLUTION: Two notches 2 and 2 are formed symmetrically from two opposing sides toward the center of a substantially rectangular tough plate member 1, and the plate member 1 is bent into a substantially U-shape from between these notches and tightened. A male screw 5 in which the main body 3 is made, and a plurality of clamped members 4, 4 inserted between the cutouts 2 and 2 of the main body 3 are screwed into one main body 3 on one side of the notch side.
By tightly tightening, the clamped members were clamped and held by the clamping body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a clamp for fastening two plate members or a plate and a three-dimensional object such as a rod from the outer surface thereof, and in particular, can promote a reduction in weight and toughness. To a fastening and joining device.

[0002]

2. Description of the Related Art This type of fastening and clamping device has long been used, for example, by molding cast iron into a C-shape in a side view, or by joining two U-shaped iron plates into a plate shape by spotting or the like. There is a so-called "Shako Manriki" fastener. At the time of use, a plurality of members are loosely inserted between the ends of the C-shaped or U-shaped metal fittings, and the above-mentioned members are fastened and fixed to one side of the above-mentioned edges from outside by bolts screwed to the upper or lower parts of the metal fittings. Things.

[0003]

Among the above-mentioned conventional techniques, those made by molding a metal in order to strengthen the tightening force are difficult to handle with a large weight for a small size.
There is a problem that the production is complicated and expensive.

Further, the conventional "Shakoman", which is made by joining two U-shaped iron plates in the form of a spot and attaching them in a plate shape, is likely to be twisted up and down when the iron plate is strongly tightened. However, when the size is large, the above-mentioned torsion becomes severe, so that there is an essential and serious problem that it cannot be used in places where thick objects are strongly fastened.

According to the present invention, in order to eliminate the above-mentioned problems, a main body of a fastener used at a joint site of a plurality of members is formed by three-dimensional sheet metal processing, thereby providing a strong and lightweight fastener. The purpose is to provide a large amount at low cost.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to form two notches symmetrically from two opposing sides toward the center of a substantially rectangular tough plate, and to substantially cut the plate from between these notches. It is bent into a U-shape to form a tightening main body, and a plurality of clamped members inserted between the cutouts of the main body are screwed to one cutout end side and screwed to the main body at the other cutout end side. This was achieved by clamping and holding the members to be clamped together by the tightening main body.

[0007]

Embodiments of the present invention will be described with reference to the drawings. First, the basic form of the present invention is:
As shown in FIGS. 1 and 2, two notches 2 and 2 having a wide shape are formed symmetrically in a substantially rectangular tough plate material 1 such as a metal plate from the opposite short sides thereof toward the center thereof by a press die cutting method. Then, the plate material 1 is bent into a substantially U-shape as shown in FIG. 1 by a press machine from the two parallel fold curves 1a between these notches to form a three-dimensional fastening body 3 having a substantially U-shape in both the plane and the side. .

Then, a plurality of sandwiching members 4, such as plate members, which are inserted between the notches 2, 2 of the main body 3 in a state of two sheets are partially inserted inward with the lower notch end side 2 a 90 inward. ° Place it on the folded bridging piece 6 and, from the top,
1 and FIG. 3 show the above-mentioned two-member clamped members 4 and 4 with a male screw 5 screwed into a nut N of a bridging piece 7 formed by partially bending the upper side 3a inward through a seat plate 5a. By tightly tightening as described above, a fastening and clamping device according to the present invention which can clamp and hold the clamped members 4 and 4 to each other with the clamping member 3 in a state of two sheets as shown in FIG.

A manual handle h such as a horizontal bar or a butterfly is provided on the upper part of the male screw 5, and a pressing seat plate 5a is rotatably supported on the lower end of the male screw 5 by a known means. Although an example has been described, the seat plate 5a can be omitted when the to-be-clamped member 4 is a tough material, and may be tightened with the male screw 5 only. Further, the bridging piece 6 below the main body may be omitted, and the to-be-clamped members 4, 4 may be fastened and clamped to the end side itself of the notch 2 with the male screw 5, and the nut N may be bridged. FIG.
As shown in FIG. 3, welding is performed at the welding portion y.

In any of the above cases, the tightening stress applied to the main body 3 is applied to the upper and lower edges of the notches 2 and 2 of the main body 3 in a direction orthogonal to the thickness direction of the main body 3 as shown in FIG. Therefore, even if the thickness of the main body 3 is not so small as about 2 to 3 mm, the main body 3 can sufficiently withstand the tightening stress without being twisted. Further, the sandwiching members 4, 4 are not limited to plate materials, but may be pipes or rods.
It can be arranged in any direction, such as oblique, and the mounting direction of the tightening main body 3 is uniquely determined according to the direction of this arrangement.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a specific example of the means for screwing the male screw 5 to the main body 3, as shown in FIG.
A female screw hole n into which the male screw 5 can be inserted is formed by a tapping tool, a screw hole longer than the wall thickness is formed after the hole is formed by a well-known burring method, or two screw holes are formed as shown in FIG. A female screw hole n may be formed in the bridging piece 7 having the joining structure.

Further, the location where the bridging piece 7 is formed is not limited to the above-described upper side of the main body, but may be formed one step lower than the upper side of the main body as shown in FIG. As shown in (d), the upper side of the cutout end side of the main body 3 is bent inward to form a bridging piece 7, and a nut N is welded to the bridging piece 7 or a female screw hole n is formed. Can also be used.

If the vertical interval of the cutout 2 itself of the main body 3 is set small as shown in FIG. 5A, it becomes small and convenient for sandwiching the plate members and the like. If the upper and lower dimensions of the notch 2 are large as shown in b), a thick plate material or a three-dimensional object such as a pipe or a column material can be sandwiched.

[0014]

The present invention adopts the above-described embodiment, and has the following effects. Two notches 2 and 2 are formed symmetrically from the opposite two sides of the substantially rectangular tough plate 1 toward the center thereof, and the plate 1 is bent in a substantially U-shape in a plane and a side from between these notches. To make a three-dimensional tightening main body 3 and the notches 2 of the main body 3
The plurality of clamped members 4, 4 inserted between the two are tightly fastened to one notch end side with a male screw 5 screwed into the main body 3 on the other notch end side, thereby clamping the clamped members together. The main body 3 can clamp and hold. Therefore, since the tightening stress applied to the main body 3 is applied to the upper and lower edges of the main body cutouts 2 and 2 in a direction orthogonal to the main body thickness direction, even if the main body 3 becomes thicker, Has the first effect that it can withstand a sufficiently strong tightening stress without being twisted to the left and right, and can obtain a lightweight and robust fastener.

Further, the tightening main body 1 according to the present invention comprises:
Since metal plates can be easily manufactured in large quantities by sheet metal press three-dimensional forming, compared to the conventional two types of "Shako Manri", they can be made tough and lightweight even if they are large, and can be provided in large quantities at low cost. There is also a second effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention.

FIG. 2 is a development view of the one shown in FIG.

FIG. 3 is a vertical sectional view of a main part of the one shown in FIG. 1;

FIG. 4 is a partial perspective view showing a specific example of a male threaded portion with respect to a main body.

FIG. 5 is a perspective view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate material 2 Notch 3 Tightening main body 4 Clamping member 5 Male screw 6, 7 Bridge piece N Nut n Female screw hole

Claims (1)

(57) [Claims] 1. A substantially rectangular tough plate 1 is formed with two notches 2 and 2 symmetrically from two opposing sides thereof toward the center, and the plate 1 is bent into a substantially U-shape from between these notches. A male screw in which a tightening main body 3 is formed, and a plurality of clamped members 4, 4 inserted between the notches 2 and 2 of the main body 3 are screwed into one main body 3 on one side of the notch end side. 5
A tightening and clamping device in which the clamped members are clamped and held by a clamping body 3 by tightly tightening.