JPH10210625A - Structure of connection of wiring and piping member receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the electric connection between receivers at low cost by providing the receivers with projections for electrically connecting adjacent receivers. SOLUTION: A structure for connection of wiring and piping member receivers is such that the ends of adjacent master beams 2 form connecting sections which overlap in the width direction. At a periphery 4c of through-holes 4a of the connection section 4 of one beam 2, projections 4b are formed which are pressed into through-holes 2a of the connecting section of the other beam, and thereby have their surface treatment films removed and then electrically connect both receivers 1. As the surface treatment films of the projections 4b of one master beam 2 are removed, when the projections 4b are pressed into the through-holes 2a of the other master beam 2 and thereby the receivers 1 are electrically connected, leakage current which sometimes flows through a cable can be allowed to flow to the ground. Both receivers 1 can be electrically connected directly by the projections 4b and the peripheries 2b of the through-holes 2a, not through installation bolts 5 and nuts 6, and therefore the electrical connection between the receivers 1 can be ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of a wiring and piping material receiving member for connecting various receiving members, which are generally referred to as a cable rack, for supporting and supporting various cables. The present invention relates to a connection structure of wiring and piping material receiving members for ensuring electrical conduction between the applied receiving members.

[0002]

2. Description of the Related Art FIGS. 10 and 11 show a conventional connection structure for a wiring / piping material receiving member. In the drawing, a receiving device 1 is generally called a cable rack, and includes two parallel main girders 2 having a constant cross-sectional shape and a sub-girder 3 composed of a frame material horizontally suspended at a predetermined interval therebetween. And has a ladder shape as a whole. The receiving tools 1 are connected to each other via a connecting tool 9. 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 2 and the through hole 9a formed in the connecting member 9, and then fitting the washer 7 to the outside. 6 by tightening. Further, the parent girder 2, the child girder 3 and the connecting member 9 are made of aluminum, steel or the like, and are entirely subjected to a surface treatment such as coating with a synthetic resin paint from the viewpoint of weather resistance, rust prevention and the like. Have been.

However, since the surface treatment film applied to the surface of the receiving member 1 and the connecting member 9 is not conductive, the leakage current from the cable cannot be reliably released to the ground through the receiving member 1.

[0004] To solve this problem, a technique disclosed in Japanese Patent Publication No. 4-4808 is disclosed. The technique disclosed in the above publication is that when connecting cable racks having a non-conductive surface treatment film to each other, the cable racks are forcibly fitted into the bolt insertion holes, the bolt insertion holes are expanded, and the surface treatment film of the insertion portion is opened. 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 when screwed into the 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 a cable supported by wiring.

[0005]

However, the above-mentioned Tokuhei 4
According to the technology disclosed in Japanese Patent No. 4808, the receiving member and the connecting member are electrically connected to each other via the joint bolt and the nut. In other words, an electrical route is formed that conducts from one cable rack to the connecting bolt, the nut, and further to the other nut, the connecting 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 electrical conduction may not be secured. Further, since the joint bolt and the nut are specially processed, they are special products and are expensive.

Accordingly, the present invention provides a connection structure for a wiring / piping material receiving member which can secure the conductivity of the receiving members reliably and inexpensively by directly connecting adjacent receiving members to each other by direct conduction. It is an issue.

[0007]

According to a first aspect of the present invention, there is provided a connecting structure for a wiring and piping material receiving member, wherein both ends of adjacent parent girders form a connecting portion which overlaps with each other in a width direction. At the peripheral portion of the through hole of one of the connecting portions, a projection for removing the surface treatment film by forcibly fitting into the through hole of the other connecting portion and connecting the receiving members to each other in a conductive state was provided. Things.

According to a second aspect of the present invention, there is provided a connecting structure for a wiring / piping material receiving member, wherein the projection at the peripheral edge of the through hole according to the first aspect is formed by cutting and raising the side wall of the parent girder. It is.

According to a third aspect of the present invention, there is provided a connecting structure for a wiring / pipe material receiving member, wherein the protrusion at the peripheral edge of the through hole in the connecting portion according to the first or second aspect is provided with a through hole of the other connecting portion. It protrudes outward through the hole to support the head or nut of the connecting bolt in a detented state.

[0010]

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 main girders 2 having a constant cross-sectional shape in parallel and a child girder 3 made of a frame material horizontally suspended at a predetermined interval therebetween, and has a ladder shape as a whole. At the same time, the receiver 1 is interconnected at an end with the adjacent receiver 1. At one of the opposite ends of the main girder 2, a step portion is formed in which a portion connected to the end of the main girder 2 of the adjacent receiver 1 projects outward by an amount corresponding to the plate thickness of the main girder 2. Are formed alternately, and when the adjacent receiving members 1 are connected to each other,
Is polymerized in a flush state, as shown in FIG. The main girder 2 and the sub girder 3 are formed of aluminum, steel, or the like, and are entirely subjected to a surface treatment such as coating with a synthetic resin paint from the viewpoint of weather resistance, rust prevention, and the like. .

At the end of the main girder 2 having no step, a rectangular or oval through hole 2a elongated in the length direction thereof is formed. On the other hand, two square-shaped through-holes 4a whose longitudinal dimension is smaller than the through-hole 2a are formed at positions corresponding to the through-holes 2a of the main girder 2 in the connecting portion 4 formed with the stepped portion. Has been established. A projection 4b that can be forcibly fitted into the corresponding through hole 2a of the parent girder 2 is formed at both lateral opening edges of the through hole 4a by cutting a portion inside the through hole 4a at a right angle. It is formed integrally. The protrusion 4b is formed in a tapered shape whose upper and lower widths are the same as or slightly larger than the width of the through hole 2a of the main girder 2 at the bent portion, and are slightly smaller at the front end. That is, the projection 4b can be easily inserted into the through hole 2a of the other parent girder 2 at the tip, 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 2. Part 2b
, And the bent portion is completely inserted into the through hole 2a of the main beam 2 by forced press-fitting. The through hole 2a and the through hole 4a are formed to have a size that allows the screw portion of the mounting bolt 5 using a hexagonal bolt to be inserted. It is almost the same as the interval between two parallel sides.

Here, in the above-mentioned connecting portion, two through holes 4a are provided on the connecting portion 4 side, and two through holes 4a of the mating parent girder 2 are provided.
Although the two through holes 2a are inserted into the two through holes 2a, the present invention is not limited to this.
And two through holes 4a may be provided in the mating parent girder 2 and inserted into the through holes 4a, or the end of the main girder 2 having a step portion and no step portion may be provided. The through holes 4a and the through holes 2a corresponding to the ends of the main beam 2
It may be formed and inserted individually, and the number is not limited.

As shown in FIG. 4, the head of the mounting bolt 5 is formed in a round shape, thereby preventing a cable or the like from being flawed at the edge of the head. After the mounting bolts 5 are inserted through the through holes 2a and 4a, the nuts 6 are tightened to connect the parent girders 2 to each other.

Although FIG. 1 shows only one of a pair of opposing master girders 2, the other opposing master girder 2 has the same configuration. However, as shown in FIG. 2, in the connecting portion 41 on the opposite side, the parent girder 2 having no step has a through hole 4 a and a projection 4 b protruding outward, and the parent girder having the other step formed. 2, a through hole 2a is formed in the parent girder 2 having no step, and a through hole 4a and an inwardly protruding projection 4b are formed in the parent girder 2 having the other step. Are formed. In short, the through holes 4a, the projections 4b, and the through holes 2a of each master girder 2 are formed so that the adjacent master girders 2 can be overlapped in the width direction.

Further, in the above-described embodiment, the connecting portion 4 has a stepped portion formed so as to protrude outward. The present invention is not limited to this as long as the protrusion 4b of the connecting portion 4 can be inserted into the through hole 2a of the other parent girder 2. If there is no problem in drawing in wiring and piping material, for example, as shown in FIG. As described above, the step portion may be formed to protrude inward.

Next, a description will be given of the connection of the receiving members by the connecting structure of the receiving members for wiring and piping materials of the present embodiment configured as described above. First, the ends of the two receiving members 1 are opposed to each other from the width direction, and the through holes 4a of the parent girder 2 having the connecting portions 4 formed with the steps are opposed to the through holes 2a of the parent girder 2 on the other side. Then, the projection 4b of the connecting portion 4 of the main girder 2 having the step is inserted into the through hole 2a of the other main girder 2. At this time, since the width of the tip of the projection 4b is smaller than the upper and lower widths 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 edges 2b of the through hole 2a. Then, when the projection 4b is inserted to some extent and the tip of the projection 4b projects inside the parent girder 2, as shown in FIG.
Is inserted into the through-hole 2a and the through-hole 4a with its head being fitted between the protrusions 4b on the hexagonal side. As a result, the mounting bolt 5 is supported in a detented state. After that, when the nut 6 is tightened, the parent girder 2 is pinched as shown in FIGS. The two are in surface contact.

At this time, since the upper and lower end surfaces of the projection 4b are tapered, when the projection 4b is pressed into the through-hole 2a, it is strongly rubbed, and one or both surface treatment films of the master beam 2 are scraped off. As a result, the parent girders 2 are electrically connected.

Here, the interval between the opposing projections 4b may be reduced, or the projections 4b may be formed on the upper and lower peripheral edges of the through hole 2a. In this case, since the nut 6 is pinched or held by the projection 4b, the operator need not hold the head so that the nut 6 does not fall.

As described above, in the connection structure of the wiring / piping material receiver of the above embodiment, both ends of the adjacent parent girders 2 form a connection portion which overlaps with each other from the width direction, and the connection portion 4 is transparent. Hole 4a
Is provided with a projection 4b for removing the surface treatment film by forcibly fitting into the through hole 2a of the other connecting portion and connecting the receiving members 1 to each other in a conductive state.

Therefore, the protrusion 4b of the connecting member 9 is
When forcibly fitted into the through hole 2a, the surface treatment film is scraped off and the receivers 1 are brought into a conductive state, so that a leakage current that may occur in the cable can be released to the ground. In particular, in the case of the above-described embodiment, the two receiving members 1 are not connected to the mounting bolts 5 and the nuts 6, and the projections 4 b
And the peripheral portion 2b of the through hole 2a is directly electrically connected, so that the conductivity between the receiving members 1 can be reliably ensured.

Further, unlike the technique disclosed in Japanese Patent Publication No. 4-4808, there is no need to use specially processed joint bolts or nuts, and general-purpose bolts and nuts can be used. . Further, since the parent girders 2 are directly connected to each other, there is no need to use a separate connecting tool, and the cost can be reduced.

<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 2 having no step is formed as a round hole, and a projection 4b of the coupling portion 4 of the parent girder 2 facing the hole.
As in the first embodiment, the surface treatment film can be scraped off by press-fitting into the through hole 2c. Reference numeral 7 denotes an oval washer.

Also in the second embodiment, when the projection 4b of the connecting portion 4 is inserted into the through hole 2c of the other parent girder 2, the surface treatment film is formed between the protrusion 4b and the peripheral portion 2d of the through hole 2c. Since they are rubbed and removed, mutual conductivity of the receiving devices 1 can be secured. Particularly, in the second embodiment, since the through hole 2c is formed by a round hole, the working of the through hole 2c is easy.

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. Also, the mounting bolt 5 has a hexagonal head,
An oblong-shaped member such as the washer 7 can also be used. In this case, the washer 7 can be omitted.

In each of the above embodiments, the through holes 2a and the through holes 4a are formed as horizontally long holes, but may be vertically long holes.

Further, the protrusion 4b in each of the above embodiments is
The tapered end surface may be formed in a saw-tooth shape. In this case, the effect of removing the surface treatment film between the peripheral portion 2b of the through hole 2a and the peripheral portion 2d of the through hole 2c can be enhanced. Also,
The tapered end face may be formed not in a straight line but in a convex or concave curved line shape. In addition, the steps of the main girders 2 may be provided on both the main girders 2, or if the adjacent receiving members 1 can be satisfactorily connected to each other, the steps of both the main girders 2 can be eliminated.

[0027]

As described above, the wiring and wiring according to the first aspect of the present invention are described above.
The connection structure of the pipe material receiving member is such that when connecting the receiving members, when the projection provided at the peripheral portion of one of the through holes of the connecting portion is forcibly fitted into the other through hole. Then, the projection and the peripheral edge of the other through hole are rubbed, whereby both or one of the surface treatment films of the receiver is scraped off, and the receivers are brought into a conductive state. Here, since both the receiving members 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. it can.

In the connecting structure of the wiring / pipe material receiving device according to the second aspect of the present invention, the projection of the through hole of the connecting portion is formed by cutting and raising the side wall of the parent girder. It can be formed at low cost with a structure.

According to the third aspect of the present invention, the projection of the through-hole of the connecting portion projects outward through the other through-hole, and the head of the connecting bolt or Since the nut is supported in a non-rotating state, it is not necessary to hold the head of the connecting bolt or the nut in the non-rotating state during the tightening operation, and therefore the workability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a connection structure of a wiring / piping material receiver according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a state where the receivers are connected to each other in the connection structure of the receiver for wiring and piping material according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a state in which the receivers are connected to each other in another connection structure of wiring / piping material receivers according to the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a state before coupling of the receiving members of FIG. 1;

5 is a main part front view showing a state in which the mounting bolt of FIG. 1 is being tightened.

FIG. 6 is a longitudinal sectional view showing a state after connection of the receiving members of FIG. 1;

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

FIG. 8 is a perspective view showing a connection structure of a wiring / piping material receiver according to a second embodiment of the present invention.

FIG. 9 is a front view showing a main part of a connection structure of the wiring / piping material receiver of FIG. 8;

FIG. 10 is a perspective view showing a conventional connection structure of a wiring / piping material receiver.

FIG. 11 is an exploded perspective view of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 receiving member 2 parent girder member 2a, 2c, 4a through hole 2b, 2d peripheral portion 4 connecting portion 4b projection 5 mounting bolt 6 nut

Claims (3)

[Claims] 1. A connecting portion in which both ends of adjacent parent girders overlap each other from the width direction are formed with through holes through which bolts are inserted at corresponding positions, and the connecting portions overlap each other. The peripheral edge of one of the through holes has a projection for removing the surface treatment film by forcibly fitting into the through hole of the other connecting portion and connecting the receiving members to each other in a conductive state. A connection structure for a wiring / piping material receiving member. 2. The connecting structure for a wiring / pipe material receiving device according to claim 1, wherein the protrusion at the peripheral edge of the through hole of the connecting portion is formed by cutting and raising a side wall of the parent girder. . 3. The projection at the peripheral edge of the through hole of the connecting portion projects outward through the through hole of the other connecting portion to support the head or nut of the connecting bolt in a detented state. The connecting structure for a wiring and piping material receiving device according to claim 1 or 2, wherein: