JPS582103Y2 - Branch connection fitting for cable rack - Google Patents

Description

[Detailed description of the invention] This invention relates to branch connection fittings for cable racks, and is particularly useful for branching cable racks laid inside and outside building structures when wiring conduit, cables, etc. The present invention relates to a branch connection fitting for cable racks that allows linear cable racks to be connected horizontally in a crossed manner.

BACKGROUND ART Conventionally, branching cable racks configured in advance according to the branching situation have been used at branching points that are provided as necessary when wiring conduits, cables, etc. inside and outside of building structures.

For this reason, cable racks of various shapes are available depending on the width of the girder, but they take up space and are cumbersome to transport and store.

In view of this situation, in order to simplify the branch connection, a branch connection fitting consisting of a straddle plate and a pair of holding plates was proposed as Utility Model Application No. 115228/1983 (publication of Utility Model Publication No. 13031/1983). However, the side piece 108 of this holding plate 107
Since the connecting piece 110 is provided with a through hole 114 and the connecting piece 110 is provided with an insertion groove 112 that communicates with the outside, there is a drawback that the strength is weak (see FIG. 4).

Therefore, this idea was devised to eliminate the above-mentioned drawbacks.It is installed at the crossing points of straight cable racks to achieve a strong and reliable connection, and it is possible to connect branch wiring from any position without being limited to the branch position. In addition to making it possible to change the branching position easily, it also has increased strength and robustness, and also allows for easy screw fastening operations between the straddle plate and the holding plate. It is something.

Therefore, the gist of this invention is to extend a connecting support piece having a vertical locking piece at the end to a main piece having an insertion hole into which a predetermined hanging rod member can be screwed, A straddle plate having a generally bifurcated planar shape with a bolt insertion hole bored in the connecting support piece, a supporting piece having a generally groove-shaped cross section at the lower part of the side piece, and a connecting piece capable of abutting the connecting support piece being provided at the upper part. , a pair of holding plates with bolt insertion holes that are approximately cross-shaped on the side pieces and approximately letter-shaped on the connecting pieces but communicate with each other but do not communicate with the outside. and a fastening bolt with a nut that is inserted into the bolt insertion hole and can be inserted into the bolt insertion hole with the nut attached.

One embodiment of this invention will be explained below.
The reference numeral 1 shown in the figure is a straddle board, which has a main piece 3 with an insertion hole 2 through which a hanging rod member B such as a hanging bolt buried and fixed in the ceiling or the like can be inserted and screwed. A connecting support piece 4 having a shaped locking piece 5 at its end is extended to form a substantially bifurcated shape with a thousand sides.

As shown in the figure, the main piece 3 and the connecting support piece 4 are
By forming the cable rack L into a T-shape, the cable rack L can be branched into a T-shape, but it is also possible to change the bifurcated angle of the connecting support pieces 4 as necessary.

Further, the connecting arm 4 has a bolt insertion hole 6 through which a fastening bolt 13 (to be described later) can be inserted, and this bolt insertion hole 6 is communicated with the outside at one end edge of the connecting arm 4 if necessary. Sometimes.

7 is a pair of holding plates, each of which has a side piece 8.
A support piece 9 having a generally groove-shaped cross section is provided at the lower part, and a connecting piece 10 that can come into contact with the connecting support piece 4 is provided at the upper part, and can be connected to each connecting support piece 4 of the straddle board 1 with a fastening bolt 13. In addition, the 8 side pieces are approximately cross-shaped, and the connecting piece 1
At position 0, bolt insertion holes 11 are bored that are approximately in the shape of a letter and communicate with each other, but do not communicate with the outside.

That is, in the bolt insertion hole 11, the cross-shaped part and the straight-shaped part communicate with each other at the continuous bending part of the side piece 8 and the connecting piece 10, and the vertically elongated hole along the height direction of the side piece 8 communicates with the straight part. The width of the hole is not smaller than the thread diameter of a fastening bolt 13, which will be described later, and the width and height of the horizontally elongated hole are not smaller than those of a nut 12, which will be described later.

There is a fastening bolt 13 with a nut 12 that screws together the straddle plate 1 and the pair of holding plates 7,
This fastening bolt 13 is inserted into the bolt insertion hole 6,
Thereafter, the nut 12 can be inserted into the bolt insertion hole 11, particularly the cross-shaped portion thereof, while the nut 12 remains temporarily screwed.

Next, to explain its use with reference to Figures 2 and 3, two of these devised metal fittings are used as a set at the T-shaped branch position of the cable rack L, and the straddle plate 1 is The stop piece 5 and the support piece 9 of the holding plate 7 are made to face each other vertically, and between them, the main girder 20 of the cable rack L is brought into close contact with the side piece 8, and is firmly clamped and tightened appropriately with a fastening bolt 13.

At this time, the fastening bolt 13 is inserted into the bolt insertion hole 6 and the nut 12 is screwed in advance, and the fastening bolt 13 with the nut 12 in this state is inserted into the bolt insertion hole 11 as it is, and then the nut 12 is inserted again. Rotate the connecting piece 10
It is pressed against the surface.

Then, with respect to the cable rack L crossed to be branched, one side of the bifurcated connecting branch 4 is placed at the branching position of the main cable rack L, and the other side of the connecting branch 4 is connected to the cable to be branched. It is placed at the end of the rack L so as to straddle both cable racks L, and is inserted and screwed into the hanging rod member B through the insertion hole 2 as necessary to support the load.

Furthermore, it goes without saying that this portion of the main girder 20 may be cut off in order to run wires such as conduits and cables.

Therefore, the locking piece 5 formed vertically at the end of the connecting support piece 4 and the holding piece 9 connected to the connecting support piece 4 by the fastening bolt 13 both hold the main girder 20 of the cable rack L. When gripped from above and below and once attached, the connecting support piece 4 extends integrally with the main piece 3, and the connected cable racks L may separate from each other or become distorted due to external impact. It can sufficiently withstand the load of wiring conduits, cables, etc., without causing any risk of damage.

Moreover, since the fastening bolt 13 with the nut 12 can be inserted into the bolt insertion hole 11 of the holding plate 7 as it is, the connecting piece 10 of the holding plate 7 can be inserted into the connecting piece 4 of the straddle plate 1. The abutment and connection work can be performed extremely smoothly.

In addition, by temporarily screwing the nut 12 after the fastening bolt 13 is inserted into the bolt insertion hole 6, an integral combination with the holding plate 1 can be obtained, and the fastening parts can be used in the field. Since loss can be prevented, the work efficiency can be further improved.

Not only that, but the bolt holes 11 are approximately cross-shaped in the 8 side pieces, and approximately in the shape of a letter in the 10 connecting pieces, and although they communicate with each other, they do not communicate with the outside. , the mechanical strength of the member itself can be increased, which in turn serves to increase the support stability of the cable rack L.

That is, in the past, as shown in FIG. 4, in order to insert a fastening bolt with a nut, an insertion groove 112 communicating with the outside was formed, so that the opening portion communicating with the outside was formed. There was a risk that it would expand and fall off, but with this invention, there is no such risk at all.

As explained above, according to this invention, by simply combining straight cables appropriately and installing them at their horizontal crossing positions, you can construct any branching situation, branch at any desired position, and change the branching position after installation. Not only is it possible to provide a strong and reliable connection and support, but because a fastening bolt with a nut can be pre-assembled to the straddle plate, there is no need to lose fastening parts, making it convenient. It is possible to dramatically improve work efficiency, is strong and stable, does not fall off once connected, and can be installed without being restricted by the cross-sectional shape of the cable rack. Great effects can be expected.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of this invention.
FIG. 1 is an exploded perspective view, FIG. 2 is a perspective view of the device in use, FIG. 3 is a partially cut-away side view, and FIG. 4 is a perspective view of a conventional example of silver holder.

Claims (1)

[Scope of utility model registration request] A flat surface in which a main piece has an insertion hole through which a specified hanging rod member can be screwed, a connecting piece having a vertical locking piece at the end is extended, and a bolt insertion hole is made in the connecting piece. A substantially bifurcated straddle plate, a supporting piece having a substantially groove-shaped cross section at the lower part of the side piece, and a connecting piece capable of contacting the connecting support piece at the upper part, and a substantially cross-shaped straddle plate at the side piece part. In the connecting piece part, there is a pair of holding plates with bolt insertion holes that are approximately letter-shaped and communicate with each other but do not communicate with the outside, and a pair of holding plates that are inserted into the bolt insertion holes and equipped with nuts. A branch connection fitting for a cable rack, comprising a fastening bolt with a nut that can be inserted into a bolt insertion hole as is.