JP2002298937A - Earth branching metal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth branching metal fitting of excellent economical efficiency and reliability, attaining cost reduction and weight reduction with simple constitution to contribute to the reduction of construction cost and the improvement of work efficiency. SOLUTION: This earth branching metal fitting 7 is made of a plate member as a whole and provided with a square bottom face part 7a at the center part. Connection parts 8 extending outward in cross shape are provided at four corners of the bottom face part 7a. The connection part 8 has a triangular cross section by bending the end parts of the plate member to rise from both sides. Projecting parts 9 projecting downward are formed at four corners of the bottom face part 7a, and a stopper 10 abutting on the end part of an earth wire 2 is formed at the center of the bottom face part 7a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground branching bracket for branching a ground wire into a plurality of branches.

[0002]

2. Description of the Related Art At a time when IT-related equipment is rapidly spreading,
Grounding work, which is essential for equipment maintenance, is becoming increasingly important. One of the devices used in the grounding work is a ground branch metal fitting that branches a plurality of ground wires. The number of earth branch fittings used tends to increase in proportion to the number of devices installed, and high demand has been obtained. Here, a conventional example of the earth branch metal fitting will be specifically described with reference to FIGS. FIG. 6 is a perspective view of a conventional example, and FIG. 7 is a sectional view of a connector in the conventional example.

[0006] The earth branch metal fitting 1 shown in FIG. 6 is of a three-way type for connecting three earth wires 2. The branching metal fitting 1 is provided with a branching member 3 having a T-shaped copper round pipe. Openings are respectively formed on the left and right and below the branch member 3, and a cylindrical connector 4 is connected to each of the openings. Branch member 3 in connector 4
A stopper 5 is formed at the side end, that is, at the inside end (see FIG. 7). The stopper 5 is provided with a step so as to have a smaller inner diameter than the other parts of the connector 4, and comes into contact with the end of the ground wire 2. Further, the inside diameter of the outer end of the connector 4 is set slightly smaller than the outside diameter of the ground wire 2, and a notch 6 extending linearly in the axial direction of the connector 4 is formed. The notch 6 serves to widen the opening of the connector 4 when the ground wire 2 is inserted, and to tighten the ground wire 2 by a spring effect.

[0004]

The above-mentioned earth branch metal fitting 1 is manufactured by cutting a copper round bar as a raw material. For this reason, not only was the material used wasted and economically disadvantageous, but also the processing itself was troublesome. In addition, the above-mentioned earth branch metal fitting 1
It is composed of many parts such as one branch member 3 and three connectors 4. Therefore, assembling the parts requires a long working time, and the manufacturing cost is increased. In addition, the earth branch fitting 1 having a plurality of parts is heavy in weight, and has been an obstacle in improving work efficiency during construction. As a result, a problem such as a rise in construction cost has occurred.

The present invention has been proposed to solve such problems of the prior art, and its object is to reduce the manufacturing cost and weight by a simple configuration, and to reduce the construction cost. Another object of the present invention is to provide an economical and reliable earth branch metal fitting which contributes to improvement of work efficiency.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a ground branching metal fitting provided with a plurality of connecting portions to which a ground wire can be connected, and has the following technical features. ing. The invention according to claim 1 is characterized in that the whole is composed of a plate member, and the connecting portion is provided by bending an end of the plate member. According to the first aspect of the present invention, since the whole is constituted by one plate member, it can be manufactured only by press forming. Therefore, there is no waste in the materials used, and the assembling operation can be omitted. As a result, a significant cost reduction is realized. Further, since the number of parts is small, the weight can be easily reduced and the working efficiency can be improved.

According to a second aspect of the present invention, in the ground branch metal fitting according to the first aspect, the connecting portion is provided by bending an end of the plate member so that a cross section thereof has a triangular shape. I have. According to the second aspect of the invention,
The connecting portion can be made extremely easily, and the cost can be further reduced.

According to a third aspect of the present invention, in the earth branch metal fitting according to the first or second aspect, a projection protruding downward is formed on the bottom surface. According to the third aspect of the invention, the ground branching metal can be slightly lifted from the floor surface by the projection. For this reason, handling when lifting the earth branch metal fitting from the floor surface is facilitated, and work efficiency is improved. Further, the rigidity of the metal fitting body when the ground wire is inserted can be increased by forming the projection.

According to a fourth aspect of the present invention, there is provided the ground branch metal fitting according to any one of the first to third aspects, wherein a stopper is formed to contact an end of the ground wire. According to the fourth aspect of the present invention, since the stopper for the ground wire can be formed by press forming, the manufacturing cost can be reduced and the construction cost can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a representative embodiment of the earth branch metal fitting according to the present invention will be specifically described with reference to FIGS. This embodiment is described in claims 1 to 3.
FIG. 1 is a perspective view schematically showing the present embodiment, FIG. 2 is a plan view of the present embodiment, and FIG. 3 is a front view of the present embodiment.

(1) Configuration The earth branch metal fitting 7 shown in FIGS. 1 to 4 is of a four-way type for connecting four earth wires 2. Earth branch fitting 7
Is composed entirely of a plate member, and has a square bottom surface 7a at the center. At four corners of the bottom surface portion 7a, connection portions 8 are provided so as to extend outward in a cross shape. The connecting portion 8 is provided so that the end of the plate member is bent so as to rise from both sides, and the cross section becomes triangular. At this time, as shown in FIG. 3, the ground wire 2 is inserted into the connection portion 8.

At the four corners of the bottom surface 7a and at positions overlapping the ends of the connection portions 8, there are formed substantially elliptical projections 9 projecting downward. Further, a circular stopper 10 is formed at the center of the bottom surface portion 7a so as to protrude upward. The stopper 10 comes into contact with the end of the ground wire 2. The plate member is plated with tin having a thickness of 5 μm.

(2) Operation and Effect The operation and effect of the present embodiment having the above configuration are as follows. That is, since a single plate member is used instead of using a plurality of parts as in the conventional example, the ground branch metal fitting 7 including the protrusion 9 and the stopper 10 is manufactured only by press forming. be able to. Moreover, the connecting portion 8 can be made by simply bending the plate member. Therefore, it is possible to use no wasted material and to omit the assembling work. Further, a stopper 10 for regulating the position of the ground wire 2 is sufficient at one place common to the four connection portions 8, and can be formed by press molding. According to the present embodiment, it is possible to significantly reduce the cost, and to provide the economically advantageous earth branch metal fitting 7.

Further, according to this embodiment, since the weight can be reduced by reducing the number of parts, the work efficiency at the time of construction can be improved. Further, in the present embodiment, the projection 9 can slightly lift the earth branch metal fitting 7 from the floor surface. Therefore, the ground branch metal fitting 7 is not placed exactly on the floor, but is slightly lifted off the floor. Thereby, the earth branch metal fitting 7 can be easily lifted from the floor surface, and the work can be speeded up. In addition, the formation of the projection 9 makes it possible to increase the rigidity of the main body of the earth branch metal fitting 7 when the earth wire 2 is inserted into the connection part 8.

(3) Other Embodiments The present invention is not limited to the above embodiments, and the shapes, materials and dimensions of each member can be changed as appropriate. A three-way type embodiment in which the portion 8 spreads in a T-shape (see FIG. 4) and a two-way type embodiment in which two connecting portions 8 are linearly arranged (see FIG. 5) are also included. Further, the connection portion can be appropriately selected, and the cross section is not limited to a triangle and may be a quadrangle.

[0016]

As described above, according to the earth branch metal fitting of the present invention, the whole is constituted by the plate member, and the end of the plate member is bent to provide the connection portion of the earth wire, so that the press forming is performed. Production is possible only by processing, and cost reduction and weight reduction can be achieved, which can contribute to reduction of construction cost and improvement of work efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a typical embodiment according to the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a front view of the embodiment.

FIG. 4 is a plan view of another embodiment according to the present invention.

FIG. 5 is a plan view of another embodiment according to the present invention.

FIG. 6 is a perspective view of a conventional earth branch metal fitting.

FIG. 7 is a sectional view of a connector in a conventional earth branch metal fitting.

[Explanation of symbols]

 1, 7 earth branch metal fittings 2 earth wire 3 branch member 4 connector 5, 10 stopper 6 cutting part 8 connecting part 9 projecting part

Claims (4)

[Claims] 1. An earth branch metal fitting provided with a plurality of connection portions to which a ground wire can be connected, wherein the whole is formed of a plate member, and the connection portion is provided by bending an end of the plate member. The earth branch metal fitting characterized by the above-mentioned. 2. The earth branch metal fitting according to claim 1, wherein the connection part is provided by bending an end of the plate member so that a cross section becomes triangular. 3. The earth branch metal fitting according to claim 1, wherein a projection protruding downward is formed on the bottom surface. 4. The earth branch metal fitting according to claim 1, wherein a stopper is formed to abut on an end of said ground wire.