JP2004032995A - Coupling structure and coupling for keepers for wiring and piping materials - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure the mutual conductivity between keepers certainly and at low cost by coupling a keeper and a coupling with each other, keeping direct electric conductivity. <P>SOLUTION: This coupling structure consists of the keeper 1 and the coupling 4 for coupling the fellow keepers 1, and in the above keeper 1 and the coupling 4, a through hole 2a and a through hole 4a, wherein fastening bolts 5 are to be inserted, are made in corresponding positions, and the periphery of the through hole 4a of the above coupling 4a is provided integrally with a projection 4b which removes a surface treatment film by being compulsively fitted in the through hole 2a of a master beam member 2, thereby connecting the keeper 1 with the coupling 4 directly in conductive state. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure and a connection device for a wiring and piping material receiving device that supports various cables and interconnects a receiving device generally called a cable rack, and particularly relates to a receiving device provided with a surface treatment film. TECHNICAL FIELD The present invention relates to a connection structure and a connection tool for a wiring / piping material receiver for ensuring electrical conduction between the tools.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a connecting structure of a wiring / piping material receiver of this type shown in FIGS.
In the drawing, a receiving member 1 is generally called a cable rack, and includes two parallel main beam members 2 each having a constant cross-sectional shape, and a child beam composed of a frame member suspended at a predetermined interval therebetween. And a ladder shape as a whole. The receiving tools 1 are connected to each other via a connecting tool 4. The connection between the receiving members 1 is performed by inserting the mounting bolt 5 into the through hole 2a formed in the end of the main girder member 2 and the through hole 4a formed in the connecting member 4, and then fitting the washer 7 outside. This is performed by tightening the nut 6. Further, the parent girder member 2, the child girder member 3 and the connecting member 4 are formed of aluminum, steel, or the like, and are entirely subjected to surface treatment such as painting with a synthetic resin paint from the viewpoint of weather resistance, rust prevention and the like. Is given.
[0003]
By the way, since the surface treatment films applied to the surfaces of the receiving member 1 and the connecting member 4 are not conductive, the leakage current from the cable cannot be reliably released to the ground through the receiving member 1.
[0004]
Therefore, a technique disclosed in Japanese Patent Publication No. 4-4808 is disclosed as a means for solving this problem.
The technique disclosed in the above publication is for connecting cable racks provided with a non-conductive surface treatment film, forcibly fitting the cable rack into the bolt insertion hole, expanding the bolt insertion hole, and forming the surface treatment film of the insertion portion. A conductive nut having a square root portion that breaks the wire and a conductive nut formed with a screw-shaped breaking protrusion that pushes a surface treatment film pressed into contact with the joint bolt as it is screwed into the joint bolt. And the cable racks are brought into a conductive state.
Thereby, at the same time as the connection between the cable racks, electrical continuity between the cable racks is obtained, and it is possible to avoid a leakage current that may occur in the cables supported by wiring.
[0005]
[Problems to be solved by the invention]
However, according to the technique described in Japanese Patent Publication No. 4-4808, the receiving member and the connecting member are electrically connected via the joint bolt and the nut. In other words, an electrical route is formed that conducts from one of the cable racks to the joint bolt and the nut, and further to the other nut, the joint bolt and the cable rack in this order. Therefore, depending on the degree of tightening of the nut, the peeling of the surface treatment film of the receiving member due to the breaking projection of the nut may not be complete, and there is a possibility that electrical conduction cannot be secured.
In addition, joint bolts and nuts are special because they are specially processed.
It will be expensive.
[0006]
Therefore, the present invention provides a connection structure and a connection tool for a wiring and piping material receiver that can reliably and inexpensively secure the mutual conductivity of the receivers by directly connecting and electrically connecting the reception tool and the connection tool. Is the subject.
[0007]
[Means for Solving the Problems]
The connecting structure of the wiring / piping material receiving device according to the first aspect of the present invention includes a receiving device and a connecting device for connecting the receiving devices, and the receiving device and the connecting device are provided at corresponding positions. A through-hole through which the connecting bolt is inserted is formed, and the periphery of one of the through-holes of the receiving tool and the connecting tool is forcibly fitted into the other through-hole. The surface treatment film is removed by the above process, and a projection for directly connecting the receiving member and the connecting member in a conductive state is integrally provided.
[0008]
According to a second aspect of the present invention, there is provided a connecting member for a wiring and piping material receiving member, wherein a through hole through which a connecting bolt is inserted is formed at a position corresponding to the through hole of the receiving member, and a peripheral edge of the through hole. The part is integrally provided with a projection for removing the surface treatment film by being forcibly fitted into the through-hole of the receiving member and directly connecting the receiving member to the receiving member.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
<First embodiment>
An embodiment of the present invention will be described below with reference to FIGS.
In the drawing, a receiving member 1 is composed of two parallel main girder members 2 having a constant cross-sectional shape, and a child girder member 3 formed of a frame member horizontally suspended at a predetermined interval therebetween. In addition, the receiving tool 1 is connected to each other via a connecting tool 4 at an end. The parent girder member 2, the child girder member 3, and the connecting member 4 are made of aluminum, steel, or the like, and are entirely treated with a synthetic resin paint or the like from the viewpoint of weather resistance, rust prevention, and the like. Processing has been applied.
[0010]
At the end of the parent girder member 2, two horizontally long rectangular through holes 2 a are respectively formed. On the other hand, a connecting member 4 for connecting the receiving members 1 to each other has a hole of the parent girder member 2. At the position corresponding to the through-hole 2a, four square-shaped through-holes 4a each having a length dimension smaller than the through-hole 2a are formed. A projection 4b which can be forcibly fitted into the corresponding through hole 2a of the parent girder member 2 is provided at both lateral opening edges of the through hole 4a of the connecting member 4 so that the portion inside the through hole 4a is a parent. It is integrally formed by cutting and raising the beam member 2 at a right angle. The protrusion 4b is formed in a tapered shape in which the vertical width is equal to or slightly larger than the width of the through hole 2a of the parent girder member 2 at the bent portion, and is slightly reduced at the tip. . That is, the projection 4b can be easily inserted into the through hole 2a of the parent girder member 2 at the tip end, but as the insertion proceeds, the upper and lower ends of the projection 4b become the upper and lower peripheral edges of the through hole 2a of the parent girder member 2. It comes into strong contact with the portion 2b, and the bent portion is completely inserted into the through hole 2a of the parent girder member 2 by forcible press-fitting. The through hole 2a and the through hole 4a are formed in such a size that the screw portion of the mounting bolt 5 using a hexagonal bolt can be inserted, and the interval between the projections 4b is the same as that of the hexagonal head of the mounting bolt 5. It is almost the same as the interval between two parallel sides.
[0011]
As shown in FIG. 2, the head of the mounting bolt 5 is formed in a round shape, thereby preventing a cable or the like from being scratched at the edge of the head. After the mounting bolts 5 are inserted through the through holes 2a and the through holes 4a, the parent girder member 2 and the connecting member 4 are connected by tightening the nut 6.
[0012]
Next, a description will be given of the connection of the receivers by the connection structure of the wiring and piping material receivers of the present embodiment configured as described above.
First, the ends of the two receivers 1 are abutted or opposed at a predetermined interval, and the connecting tool 4 is bridged over the ends of the two receiving tools 1, and as shown in FIG. Is inserted into the through-hole 2a of the opposing parent girder member 2. At this time, since the width of the tip of the projection 4b is smaller than the upper and lower width dimensions of the through hole 2a, it can be easily inserted into the through hole 2a. Next, since the width of the projection 4b is gradually increased, the upper and lower ends eventually come into contact with the upper and lower peripheral portions 2b of the through hole 2a. When the projection 4b is inserted to some extent and the tip of the projection 4b projects inside the parent girder member 2, as shown in FIG. It is inserted into the through hole 2a and the through hole 4a while being fitted between the protrusions 4b on the hexagonal side. Thus, the mounting bolt 5 is supported in a detented state. After that, if the nut 6 is tightened, as shown in FIGS. 4 and 5, the parent girder member 2 and the connecting member 4 are pressed, and the projection 4b is completely inserted into the through hole 2a of the parent girder member 2. The main girder member 2 and the connecting tool 4 are press-fitted to be in a surface contact state.
[0013]
At this time, since the upper and lower end surfaces of the projection 4b are tapered, when the projection 4b is press-fitted into the through hole 2a, it is strongly rubbed and the surface treatment film of one or both of the parent girder member 2 and the coupling tool 4 is scraped off. It is. As a result, the parent girder member 2 and the connector 4 are electrically connected.
[0014]
Here, the mounting positions of the mounting bolt 5 and the nut 6 may be reversed, and the projections 4b may be formed on the upper and lower peripheral edges of the through hole 2a. In this case, the nut 6 is held by the upper and lower projections 4b. Therefore, the operator need not hold the head so that the nut 6 does not fall.
[0015]
As described above, the connection structure of the wiring / piping material receiver of the above embodiment includes the receiver 1 and the connecting tool 4 for connecting the receiving tools 1 to each other. A through-hole 2a and a through-hole 4a into which the mounting bolt 5 is inserted are respectively formed at corresponding positions, and a peripheral portion of the through-hole 4a of the connecting member 4 is formed in the through-hole 2a of the parent girder member 2. The surface treatment film is removed by being forcibly fitted, and a projection 4b for electrically connecting the receiving member 1 and the connecting member 4 is provided.
[0016]
Therefore, when the projection 4b of the connecting member 4 is forcibly fitted into the through hole 2a of the parent girder member 2, the surface treatment film is scraped off, and the receiving member 1 and the connecting member 4 are brought into a conductive state. Leakage current that may occur in the cable can be released to the ground. In particular, in the case of the above embodiment, the receiving member 1 and the connecting member 4 are electrically connected directly between the projection 4b and the peripheral portion 2b of the through hole 2a without passing through the mounting bolt 5 and the nut 6. Since the connection is established, the conductivity between the receivers 1 is reliably ensured.
[0017]
Further, there is no need to use specially processed joint bolts or nuts as in the conventional technique disclosed in Japanese Patent Publication No. 4-4808, and general-purpose bolts and nuts can be used.
[0018]
<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the figure, a through-hole 2c formed in the parent girder member 2 is formed as a round hole, and a projection 4b of the connecting tool 4 facing the through-hole 2c is pressed into the through-hole 2c as in the first embodiment. By doing so, the surface treatment film can be scraped off. Reference numeral 7 denotes an oval washer.
[0019]
Also in the second embodiment, when the projection 4b of the connecting member 4 is inserted into the through hole 2c of the parent girder member 2, the surface treatment film is rubbed and removed with the peripheral edge 2d of the through hole 2c. Therefore, the mutual conductivity of the receivers 1 can be ensured. Particularly, in the second embodiment, since the through hole 2c is formed as a round hole, the working of the through hole 2c is easy.
[0020]
The washer 7 is not limited to an elliptical shape, and various types of washers such as a normal flat washer or a spring washer can be used. Further, the mounting bolt 5 may have a head formed in an oval instead of a hexagon.
[0021]
By the way, in each of the above embodiments, the through hole 2a and the through hole 4a are formed as horizontally long holes, but may be vertically long holes, and the projections 4b are provided on both sides of the peripheral edge portion 2b. , May be provided on the upper and lower sides. Although two through holes are provided at the end of the receiving member 1 and four projections 4b are provided at the connecting member 4, the number is not limited to this number, and the position can be set arbitrarily.
[0022]
Further, in each of the above embodiments, the projection 4b is provided on the through hole 4a side of the connecting tool 4, but the projection is provided on the parent girder member 2 side. Instead, it can be inserted from the outside of the connecting tool 4 on the opposite side. However, when the projection 4b is provided on the connecting member 4 side and the mounting bolt 5 is inserted from the inside of the main girder member 2 as in the above embodiments, the head of the mounting bolt 5 is stopped by the projection 4b. , The nut 6 can be tightened from the outside of the connector 4 which is a wide working space, so that workability is good.
[0023]
Further, the protrusion 4b in each of the above embodiments may have a tapered end surface formed in a sawtooth shape. In this case, the effect of removing the surface treatment film between the protrusion 4b and the peripheral portion 2b of the through hole 2a can be enhanced. Further, the tapered end face may be formed not in a straight line but in a convex or concave curved line.
【The invention's effect】
As described above, the connecting structure for the wiring / piping material receiver according to the first aspect of the present invention is provided at the peripheral portion of one of the through holes of the receiving device or the connecting device when connecting the receiving devices. When the projection is forcibly fitted into the other through-hole, the projection and the peripheral edge of the other through-hole are rubbed, whereby the surface treatment film of one or both of the receiving member and the connecting member is scraped off. The receiving tool and the connecting tool are brought into a conductive state. Here, since the receiving member and the connecting member are directly electrically connected at the peripheral portions of the projections and the through-holes without passing through mounting members such as bolts and nuts, the conductivity between the receiving members is reliably ensured. Can be secured.
[0024]
The connecting tool for a wiring and piping material receiver according to the second aspect of the present invention is characterized in that the projection provided on the peripheral portion of the through hole of the connecting tool is forcibly inserted into the through hole of the receiving tool. And the peripheral portion of the through hole of the receiving device are rubbed, and thereby, both or one surface treatment film of the receiving device and the connecting device is scraped off, so that the receiving device and the connecting device can be reliably brought into a conductive state. it can.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a connection structure of a receiving member for wiring and piping material according to a first embodiment of the present invention.
FIG. 2 is a vertical cross-sectional view showing a state before connection between a receiving member and a connector of FIG. 1;
FIG. 3 is a front view of a main part showing a state in which the mounting bolt of FIG. 1 is being tightened;
FIG. 4 is a longitudinal sectional view showing a state after connection of the receiving member and the connecting member of FIG. 1;
FIG. 5 is a sectional view taken along line AA of FIG. 4;
FIG. 6 is an exploded perspective view showing a connection structure of a wiring / piping material receiver according to a second embodiment of the present invention.
FIG. 7 is a front view showing the main part of the connection structure of the wiring / piping material receiver of FIG. 6;
FIG. 8 is a perspective view showing a connection structure of a conventional wiring and piping material receiving member.
FIG. 9 is an exploded perspective view of FIG. 8;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Receiving tool 2 Parent girder member 2a, 2c, 4a Through hole 2b, 2d Peripheral part 4 Connecting tool 4b Projection 5 Mounting bolt 6 Nut

Claims (2)

Consisting of a receiving tool and a connecting tool for connecting the receiving tools to each other,
The receiving tool and the connecting tool each have a through hole through which a connecting bolt is inserted at a corresponding position,
At the peripheral edge of one of the through holes of the receiving member and the connecting member, the surface treatment film is removed by being forcibly inserted into the other of the through holes, and the receiving member and the connecting member are separated. A connection structure for a wiring / piping material receiving member, wherein a projection for directly connecting to a conductive state is integrally provided. A through-hole through which a connecting bolt is inserted is formed at a position corresponding to the through-hole of the receiving member, and is forcibly fitted into the through-hole of the receiving member at a peripheral portion of the through-hole. A connector for a wiring and piping material receiver, wherein the surface treatment film is removed and a projection for directly connecting to the receiver in a conductive state is integrally provided.

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