JP2003111235A - Connecting structure for cable rack constituent member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure for cable rack constituent members, which allows connection between a main beam and an auxiliary beam without hampering a high anti-corrosion property, further allows the connection without requiring a separate member, and achieves reduction in the connection cost. SOLUTION: The cable rack constituent member comprises a pair of main beams 2 and a plurality of auxiliary beams 3 connecting both main beams; a protruding piece 9 for bending is provided protrudingly on both sides of the auxiliary beam 3 at the end, two insertion holes 10 for the protruding pieces 9 for bending are provided on the longitudinal plate 4 of the main beam 2 at positions to connect the auxiliary beam 3, and the main beam 2 and the auxiliary beam 3 are connected by bending the protruding pieces 9 for bending along the outer surface of the main beam 2 in a state where the end part of the auxiliary beam 3 abuts on the main beam 2, upon inserting the protruding pieces 9 for bending into the insertion holes 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable rack used for laying cables for electric power, communication and control on a ceiling, etc. The present invention relates to a bonding structure that can be bonded without damage.

[0002]

2. Description of the Related Art The general structure of a cable rack as described above is composed of a pair of parent girders having a predetermined cross-sectional shape and a plurality of child girders, and the parent girders are connected by a child girder disposed therebetween. It is assembled by things.

[0003] In such a cable rack, there has been proposed a product which uses a material having excellent anticorrosion property for a main girder and a sub-girder which are constituent members and which can be used indoors where there is a lot of humidity and moisture.

Conventionally, the connection structure of the parent girder and the child girder described above is
For example, as shown in Japanese Patent Application Laid-Open No. 10-23632, the ends of the sub-beams are butted against the parent girders, and the metal plates are laid over the bottom surfaces of the parent girder and the child girders. The overlapping portions of the parent and child girders were fastened with screws.

[0005]

By the way, in the connection by welding, the corrosion resistance of the main girder and the sub-girder, which are the constituent members, is damaged by the heat during welding, so that it cannot be used in a humid or moist part. .

Further, the above-described connecting structure using the metal fittings and the screws is expensive in cost, and it is difficult to obtain the dimensional accuracy in the connection using the metal fittings and the screws. There is a problem with the product that you cannot do it.

[0007] Therefore, an object of the present invention is to connect a parent girder and a child girder without impairing high corrosion resistance, and also to join without requiring a separate member, and to reduce the connecting cost. An object of the present invention is to provide a connection structure for rack components.

[0008]

In order to solve the above problems, the present invention is directed to a cable rack component comprising a pair of parent girders and a plurality of child girders connecting the parent girders. At the end of the, project the bending protrusions on both sides,
An insertion hole for a bending projection is provided at a position where the child girder is connected to the parent girder, and the bending projection is inserted in the insertion hole so that the end of the child girder abuts the parent girder. By bending the projecting piece along the outer surface of the parent girder, a configuration in which the parent girder and the child girder are coupled is adopted.

A concave step portion is provided on the outer surface of the parent girder at a position adjacent to the insertion hole so that a bending projection bent along the outer surface of the parent girder can be housed in the concave step portion, or the parent girder and the child girder. The lower overlapping portion of the above can be configured to have a structure in which the overlapping portion is integrally deformed to form a caulked portion.

Further, the lower overlapping portion of the parent girder and the child girder is partially cut at the lower overlapping portion of the parent girder and the child girder at the same time, and the burring surrounded by the cut is folded back to the one surface side at the same time. Can be joined at the crimped portion.

As a material for forming the parent girder and the child girder, a material having excellent corrosion resistance such as a molten zinc aluminum magnesium alloy-plated steel plate is used, and the bending protrusion inserted into the insertion hole is bent to form the parent girder and the child girder. By connecting the girders, the connection can be performed without impairing the corrosion resistance of the material and without requiring other members.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the cable rack 1 is composed of a pair of parent girders 2 and a plurality of child girders 3, and is assembled by connecting the parent girders 2 with child girders 3 arranged therebetween. . The figure illustrates a linear cable rack,
Some have curved lines and three-way or four-way intersections.

The parent girders 2 and the child girders 3 are made of a material having excellent corrosion resistance such as a hot dip galvanized aluminum magnesium alloy plated steel plate. As shown in FIG. 2, the parent girder 2 is a tall vertical plate. It is formed in the shape of a long rod having a substantially U-shaped cross-sectional shape in which bending plates 5 and 6 are provided in the same direction above and below 4, and are arranged in parallel on both sides so that the U-shapes face each other.

The child girder 3 is provided with low side plates 8 and 8 on both sides of a bottom plate 7, and has a cross-sectional shape in which upper extensions of the both side plates 8 and 8 are bent inward with each other. It has a length that determines the surface spacing, and both ends of both side plates 8 and 8 are
A bending protrusion 9 is provided so as to have a vertical posture.

Further, in the vertical plate 4 of the main girder 2, at the lower position where the child girder 3 is connected, the insertion hole 10 of the bending projection 9 is inserted.
Two of them are provided, the bending projecting piece 9 is inserted into the insertion hole 10 and the end portion of the child girder 3 is brought into contact with the parent girder 2, and the bending projecting piece 9 is attached to the vertical plate 4 of the parent girder 2. The parent girder 2 and the child girder 3 are joined by bending along the outer surface of the.

A concave step portion 11 having a depth to accommodate the plate thickness of the slave girder 3 is provided at a position adjacent to the inside of both insertion holes 10 on the outer surface of the vertical girder 2 of the master girder 2, and along the outer surface of the master girder 2. The bent projecting piece 9 that is bent is housed in the recessed step portion 11 so that no protruding portion is formed on the outer surface of the main beam 2.

The parent girder 2 and the child girder 3 are connected to each other with the lower surface of the bottom plate 7 overlapped with the lower bending plate 6 of the parent girder 2 at the end of the child girder 3, and as shown in FIG. The bending plate 6 and the bottom plate 7 of the spar 3 are joined together by a caulking portion 12 that is integrally deformed. As a result, the parent girder 2 and the child girder 3 are bent at the both-side bending projecting piece 9 and are joined at three points of the crimped portion 12, so that a strong joining strength is obtained.

FIG. 7 shows another example of the caulking connection,
At positions on both sides of the overlapping portion of the lower bending plate 6 of the parent girder 2 and the bottom plate 7 of the child girder 3, a U-shaped or U-shaped cut 13 which is partially cut off by a punch is formed and surrounded by the cut 13. The parent girders 2 and the child girders 3 are connected by a pair of caulking portions 14 in which the two burrings are folded back to the one surface side at the same time to further improve the connection strength.

The connecting structure of the present invention has the above-described structure. To connect the parent girder 2 and the child girder 3 to assemble the cable rack 1, as shown in FIG. The child girder 3 is placed in the child girder 3, and the bending projection 9 is inserted into the insertion hole 10 so that the end portion of the child girder 3 is brought into contact with the inner surface of the vertical plate 4 of the parent girder 2 and the bottom plate 7 of the child girder 3 is inserted. In the state where the lower surface of the main beam is overlapped with the lower bending plate 6 of the main girder 2, the bending projecting piece 9 is bent along the outer surface of the main beam 2, and as shown in FIG. Store inside.

After that, if the overlapping portion of the lower bending plate 6 and the bottom plate of the child girder 3 as shown in FIG. 5 is joined by the caulking portion 12 or the caulking portion 14 of the example of FIG. 7, the parent girder 2 as shown in FIG.
The connection of the child girder 3 is completed, and the cable rack 1 is assembled.

As described above, the combination of the parent girder 2 and the child girder 3 is
This can be done without the need for other members, the parent girder 2 and the child girder 3 can be joined by the same material, and corrosion due to contact with dissimilar metals can be prevented, and the length of the child girder 3 can be prevented. Dimensional accuracy can be obtained by cutting by machining, and since the end face of the child girder 3 is joined in contact with the inner surface of the vertical plate 4, the distance between the parent girders 2 and 2 on both sides is constant over the entire length. Further, the parent girder 2 and the child girder 3 are directly overlapped with each other, so that conductivity can be secured.

[0023]

As described above, according to the present invention, the bending projections are provided at both ends of the child girder so that the bending projections are formed at the positions where the child girders of the parent girder are connected. An insertion hole is provided, the bending protrusion is inserted into the insertion hole, and the end portion of the child girder is brought into contact with the parent girder, and the bending protrusion is bent along the outer surface of the parent girder so that the parent girder is bent. Since the girders and child girders are combined, the parent girders and child girders can be combined without the need for any other member, the bonding cost can be reduced, and corrosion due to dissimilar metals does not occur. The main girder and the child girder can be joined without impairing the high corrosion resistance of the material for forming the girder and child girder.

In addition, the length of the sub-girder can be dimensionally accurate by cutting by machining, and by connecting the end face of the sub-girder in contact with the inner surface of the vertical plate, the gap between the parent girders on both sides can be improved. The dimensions can be made constant over the entire length, a cable rack with high dimensional accuracy can be assembled, and the parent girder and child girders can directly overlap each other to ensure conductivity.

[Brief description of drawings]

FIG. 1 is a plan view of a cable rack according to the present invention.

FIG. 2 is an exploded perspective view showing a connection structure of cable rack constituent members.

FIG. 3 is a perspective view of a coupled state showing a coupling structure of cable rack constituent members.

FIG. 4 is a front view of a connection state showing a connection structure of cable rack constituent members.

FIG. 5 is a vertical cross-sectional side view showing a combined structure of cable rack constituent members in a combined state.

FIG. 6 is a partially cutaway plan view showing a combined structure of cable rack constituent members in a combined state.

FIG. 7 is a vertical cross-sectional front view of another example of the caulking joint portion showing the joint structure of the cable rack constituent members.

[Explanation of symbols]

1 cable rack 2 parent digits 3 child digits 4 vertical plates 5 Bending plate 6 Bending plate 7 Bottom plate 8 side plates 9 Bending projections 10 insertion holes 11 concave step 12 Caulking part 13 breaks 14 Caulking part

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[Procedure amendment]

[Submission date] October 12, 2001 (2001.10.
12)

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

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Claims (4)

[Claims] 1. A cable rack constituent member comprises a pair of parent girders and a plurality of child girders connecting the parent girders, and bending projections are projected at both ends at the ends of the child girders to form a parent. An insertion hole for the bending projecting piece is provided at a position where the child girder is connected to the girder, and the bending projecting piece is inserted into the insertion hole so that the end portion of the child girder abuts the parent girder. A connection structure for cable rack components that connects a main girder and a sub-girder by bending the protrusions along the outer surface of the main girder. 2. The method according to claim 1, wherein a recessed step portion is provided on the outer surface of the parent girder at a position adjacent to the insertion hole, and a bending projection bent along the outer surface of the parent girder is housed in the recessed step portion. A connection structure for the cable rack constituent members described. 3. The cable rack component connecting structure according to claim 1 or 2, wherein the lower overlapping portions of the parent girder and the child girder are joined with a caulking portion formed by integrally deforming the overlapping portion. 4. The parent girder and the child girder are joined by a caulking portion in which a parting cut is made at the same time as the lower overlapping portion of the parent girder and the child girder, and the burring surrounded by the notch is folded back to one side at the same time. The connecting structure for a cable rack component according to claim 1 or 2.