JPH043541Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a bottom plate for a cable rack that is capable of closing a gap between the lower surfaces of a ladder-shaped cable rack.

(Prior Art) Conventionally, when wiring various types of cables together in a building, factory, or other architectural structure, a cable rack is installed in the architectural structure and the cables are routed and stored in the cable rack.

Many of these types of cable racks are lightweight, easy to select from a variety of branching forms,
In consideration of ease of handling and other considerations, it has a so-called ladder-type structure. That is, it has a structure in which a plurality of child girders are provided at predetermined intervals between a pair of left and right parent girders facing each other.

However, in such ladder-type cable racks, the cables are exposed in the gaps between the lower girders, and the cables in these exposed areas cannot be protected from flames in the event of a fire. Moreover, there was a risk that the cable might hang down from this part, which was dangerous, and it also did not look good.

In order to improve these points, cable racks having protective structures have been proposed, such as in Japanese Utility Model Application Publications No. 58-43119, No. 58-159818, and No. 59-47216. The first one covers the top and bottom surfaces of the cable rack with a board and a protection plate, the second one has a shielding plate attached to the bottom of the lower girder, and the third one The shield covering the lower surface is suspended from the upper edge of the main girder via a spring.

(Problems to be solved by the invention) Regarding the conventional protection structures as described above, especially in the first one, the protection plate arranged on the lower surface is formed by two horizontal protrusions arranged side by side inside the main girder. Since the protection plate is attached to the fitting groove between the pieces, it is only possible to arrange the protection plate when the cable rack itself is assembled, and it is difficult to attach it to an existing cable rack. Also, in the second one,
Although it is possible to attach the cable to an existing cable rack using adhesive means, once it is attached, it is difficult to remove it, and for example, it is necessary to branch the cable downward from the middle of the cable rack. When doing so, there were some difficulties that could not be addressed. Furthermore, since the third type has a suspension structure that utilizes the elastic force of the spring, long-term use will cause the suspension to become unstable due to fatigue of the spring.
When a cable load is applied to the shield, the burden on the spring becomes large, making it difficult to withstand long-term use.

Therefore, this idea was devised in view of the conventional circumstances mentioned above, and it can be easily installed even with existing cable racks, and if necessary, it can be removed to make it easy to re-branch the cable downwards, for example. To provide a bottom plate for a cable rack which can firmly and firmly support even when the load of cables passing and stored in the cable rack is applied, and which is extremely good in terms of disaster prevention and appearance.

(Means for solving the problem) In order to achieve the above-mentioned purpose, in this invention, a plurality of child girders L2 are installed at predetermined intervals between a pair of opposing left and right parent girders L1. It is a bottom plate for a cable rack that closes the lower side of the cable rack L, which is slightly wider than the width of the cable rack L, and is in contact with the lower surface of the cable rack L, and its both side edges are bent at approximately right angles. The bolt 7 is inserted through the bottom plate main body 1 having the side piece 2 formed by the bottom plate main body 1 and the bolt 7 and the nut 8 which are inserted through the mounting hole 3 formed in the side piece 2 of the bottom plate main body 1. The lower end portion provided with the hole 5 is tightened and fixed to the side piece 2, and
A mounting bolt 4 with a threaded portion 6 threaded on the upper end.
A notch 11 that engages with the threaded part 6 of the mounting bolt 4 is formed, and is fixed to the threaded part 6 of the mounting bolt 4 via the nut 9 and abuts against the upper surface of the bent piece on the upper part of the main girder L1. One end of the clamping piece 10 is in contact with the lower surface of the bent piece on the upper part of the main girder L1, and the clamping piece 1
A means is adopted which includes a small clamping piece 14 which clamps the bent piece on the upper part of the main girder L1 between the main girder L1 and the other end of the clamping piece 14 and which is screwed and fixed by a bolt 13 that penetrates the clamping piece 10.

(Function) Therefore, in this invention, the bottom plate main body 1 is applied to the lower surface of the cable rack L, and closes the lower surface of the cable rack L, and the mounting hole 3 of the side piece 2 of the bottom plate main body 1 and The bolt 7 is inserted into the insertion hole 5 at the lower end of the mounting bolt 4 and is tightened and fixed with a nut 8, so that the mounting bolt 4 is fixed to the side piece 2.

Also, the notch 11 provided at one end of the clamping piece 10 is engaged with the threaded part 6 at the upper end of the mounting bolt 4, and the lower surface of the clamping piece 10 comes into contact with the upper surface of the bent piece on the upper part of the main girder L1. In this state, the nut 9 is tightened to the threaded portion 6 at the upper end of the mounting bolt 4, and the clamping piece 1
0 is fixed to the mounting bolt 4.

Furthermore, the upper surface of one end of the small clamping piece 14 is brought into contact with the lower surface of the bent piece on the upper part of the main spar L1, and the bent piece on the upper part of the main spar L1 is sandwiched between the clamping piece 10, and the clamping piece 10
The bolt 13 inserted through is screwed into the screw hole 15 provided in the small clamping piece 14, and the small clamping piece 14 is fixed to the clamping piece 10.

Then, the bottom plate main body 1 has both sides 2 supported and fixed by the mounting bolts 4, and the upper end of the mounting bolt 4 has a clamping piece 14 that clamps the bent piece on the upper part of the main girder L1 of the cable rack L. The pieces 10 are engaged and fixed, and the bottom plate main body 1 is firmly attached and fixed to the lower surface of the cable rack L.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

As shown in the figure, the cable rack L to which the cable rack bottom plate of this invention is attached has a plurality of child girders L2 installed at predetermined intervals between a pair of opposing left and right main girders L1, and the overall shape is exhibits a so-called ladder shape. This cable rack L is installed in a building, factory, or other appropriate architectural structure, for example, by a suspension rod member B such as a predetermined suspension bolt.
The cable is installed by being suspended from the cable.

Moreover, a bottom plate main body 1 is arranged on the lower surface of the cable rack L to close the gap between the lower surfaces. The left and right side pieces 2 are formed by bending the portions at approximately right angles, and attachment holes 3 are bored at appropriate positions in the side pieces 2, and the longitudinal section thereof is formed in the shape of a generally shallow groove. The bottom plate main body 1 disposed on the lower surface of the cable rack L closes the gap between the child beams L2 on the lower surface of the cable rack L over the entire cable rack L.
The length of one cable rack L does not necessarily have to correspond to the length of one cable rack L.

To fix the bottom plate body 1 to the cable rack L, first place the bottom plate body 1 on the lower surface of the cable rack L, and insert the lower ends of the mounting bolts 4 into the mounting holes 3 drilled in the side pieces 2 of the bottom plate body 1. The lower end of the mounting bolt 4 is brought into contact with the outer surface of the side piece 2 by aligning the insertion hole 5 drilled in the lower part. Then, the bolt 7 is inserted from the inside of the side piece 2 into the attachment hole 3 of the side piece 2 and the insertion hole 5 of the attachment bolt 4, and tightened with the nut 8.

Furthermore, the notch 11 provided at one end of the clamping piece 10 is engaged with the threaded part 6 at the upper end of the mounting bolt 4, and tightened with the nut 9. Bring it into contact with the top surface of the curved piece. Next, the upper surface of one end of the small clamping piece 14 is brought into contact with the lower surface of the folded piece on the upper part of the master spar L1, and the folded piece on the upper part of the master spar L1 is sandwiched between it and the clamped piece 10. This clamping is performed by tightening and fixing a bolt 13 inserted into a through hole 12 drilled at the other end of the clamping piece 10 into a screw hole 15 provided in the small clamping piece 14.

By the way, the mounting bolt 4 is attached to the cable rack L.
It is formed to be longer than the width of the main girder L1, and its lower end is formed substantially flat so as to make good contact with the side piece 2, and an insertion hole 5 is opened in its center, and the upper end is A threaded portion 6 is provided with a male screw.

The clamping piece 10 is formed of a substantially rectangular plate-shaped metal piece, and a notch 11 in a substantially U-shape is formed on one end of the clamping piece 10 so that the threaded portion 6 of the mounting bolt 4 can engage with the side edge thereof. ing. And on the other end,
A through-hole 12 is drilled through which a bolt 13 for clamping and fixing the bent piece on the upper part of the main beam L1 between the small clamping piece 14 is inserted.

The small clamping piece 14 has an upper surface of the upper part of the main spar L1 so that the upper surface of one end abuts the lower surface of the folded piece on the upper part of the main spar L1, and the other end contacts the lower face of the folded piece of the upper part of the main spar L1 so that it abuts on the clamping piece 10 across the folded piece of the upper part of the main spar L1. A bent portion 16 is formed which is bent obliquely upward at a height corresponding to the thickness of the bent piece. Due to this bent portion 16, when the bolt 13 inserted through the insertion hole 12 of the clamping piece 10 is fastened to the screw hole 15 with a female thread, there is a gap between the clamping piece 10 and the main girder L.
1. The upper part of the folded piece is firmly clamped and fixed in a stable manner.

In addition, fixing the lower end of the mounting bolt 4 to the side piece 2 is as follows:
Instead of using the nut 8, a female thread may be threaded into the insertion hole 5 at the lower end of the mounting bolt 4, and the bolt 7 may be used to tighten it. Of course, instead of the screw hole 15, a simple small hole may be bored in the hole 14, and the screw hole 14 may be fixed with the bolt 13 via a nut.

When using this device constructed as described above, the bottom plate main body 1 is placed on the lower surface of the cable rack L, and the bolts 7 are inserted through the mounting holes 3 of the side pieces 2 and the insertion holes 5 at the lower end of the mounting bolts 4. , the mounting bolt 4 is fixed to the outer surface of the side piece 2 by tightening the nut 8. Then, the notch 11 of the clamping piece 10 is engaged with the threaded portion 6 at the upper end of the mounting bolt 4, and the nut 9 is screwed from above. On the other hand, the lower surface of the clamping piece 10 is brought into contact with the upper surface of the bent piece on the upper part of the main girder L1, and the clamping piece 1
The upper surface of one end of 4 is brought into contact with the lower surface of the bent piece on the upper part of the main spar L1, and the main spar L is held between the clamping piece 10 and the small clamping piece 14
1. Pinch the folded piece at the top. And bolt 13
is inserted into the through-hole 12 of the clamping piece 10 and screwed into the screw hole 15 of the clamping piece 14, thereby clamping and fixing the bent piece on the upper part of the main girder L1 between the clamping piece 10 and the clamping piece 14.

At the same time, the mounting bolt 4 can be fixed even more firmly to the clamping piece 10 by tightening the nut 9 even more strongly while checking the fixing condition between the clamping piece 10 and the clamping piece 14.

As a result, the bottom plate main body 1 is attached and fixed to the lower surface of the cable rack L.

Apart from attaching and fixing the bottom plate main body 1 to the cable rack L, there is also a cable W inside the cable rack L.
is wired and stored. The bottom plate main body 1 can be attached to an existing cable rack L or a newly installed cable rack L.

Also, when removing the cable rack bottom plate, just follow the installation procedure described above in reverse order.
First, loosen the bolt 13 and remove the small clamping piece 14 from the clamping piece 10, then loosen the nut 9 and remove the clamping piece 10 from the threaded part 6 of the mounting bolt 4, and finally loosen the nut 8 and remove the bolt 7. Then, the mounting bolt 4 can be removed.

(Effect of the invention) Therefore, according to the cable rack bottom plate of this invention, it can be used in any cable rack L, whether it is an existing or newly installed one, and even if the cable W is wired and stored in the cable rack L. , cable rack L
To easily and surely close a gap between the lower surfaces and to improve not only disaster prevention but also good appearance when viewed from below (appearance appearance).

To attach the cable rack L, place the bottom plate main body 1 from below the cable rack L, and insert the bolts 7 into the mounting holes 3 in the side pieces 2 of the bottom plate main body 1 and the insertion holes 5 in the lower ends of the mounting bolts 4. At the same time, the notch 11 of the clamping piece 10 is engaged with the threaded part 6 at the upper end of the mounting bolt 4, and the nut 9 is fastened to the threaded part 6. At this time, the clamping piece 10
The lower surface of the cable rack L is brought into contact with the upper surface of the bent piece on the upper part of the main girder L1, and the upper surface of one end of the small holding piece 14 is brought into contact with the lower face of the bent piece on the upper part of the main girder L1. The bottom plate main body 1 can be securely attached to the lower surface of the cable rack L by simply inserting the bent piece at the top of the main girder L1 and fixing the small clamping piece 14 with the bolt 13 inserted through the clamping piece 10. . Moreover, this installation work
Since the work can be carried out only on the side of the cable rack L, the work can be carried out easily even in a confined space.

As explained above, according to this invention, the cable rack can be easily installed even in an existing cable rack, and if necessary, it can be removed to facilitate re-branching the cable downward, allowing the cable to be routed within the cable rack. It can firmly and firmly support even when the load of the stored cables is applied, and it has extremely useful effects in terms of disaster prevention and appearance.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is an exploded perspective view before installation to a cable rack, Fig. 2 is an exploded perspective view of the main part, and Fig. 3 is a sectional view of the main part after installation. It is a diagram. L...Cable rack, L1...Main girder, L2...
... Child girder, W... Cable, B... Hanging rod member, 1...
...Bottom plate body, 2...Side piece, 3...Mounting hole, 4...
Mounting bolt, 5...Insertion hole, 6...Threaded part, 7...
...Bolt, 8...Natsuto, 9...Natsuto, 10...
...Holding piece, 11... Notch, 12... Penetration hole, 1
3... Bolt, 14... Small clamping piece, 15... Screw hole, 16... Bent part.

Claims (1)

[Scope of utility model registration request] A bottom plate for a cable rack that closes the lower surface of a cable rack, which is made up of a plurality of child girders installed at predetermined intervals between a pair of opposing left and right parent girders, and is slightly wider than the width of the cable rack. and a bottom plate main body having side pieces that are in contact with the lower surface of the cable rack and formed by bending both side edge portions at a substantially right angle, and a bolt that is inserted through a mounting hole drilled in the side pieces of the bottom plate main body. The lower end, which has an insertion hole into which the bolt is inserted, is tightened and fixed to the side piece through a nut and a mounting bolt, which has a threaded part on the upper end, and a threaded part of this mounting bolt. A clamping piece is formed with an engaging notch, is fixed to the threaded part of the mounting bolt via a nut, and comes into contact with the upper surface of the bent piece on the upper part of the main girder, and one end is attached to the lower surface of the bent piece on the upper part of the main girder. and a small clamping piece that clamps the bent piece of the upper part of the main girder between the clamping piece and the other end of which is screwed and fixed by a bolt that penetrates the clamping piece. Bottom plate for cable rack.