JPS5845459Y2 - Cable rack fixing bracket - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to cable rack fixing fittings.

A cable rack that supports cables installed in a tunnel is installed on a tunnel wall or a support fixed thereto by being fixed to a frame attached perpendicularly to the wall surface.

Conventionally, various types of frames are prepared according to the dimensions of the site, bolt holes for fixing the rack are formed in these frames, and the rack is attached to the frame by tightening the bolts.

As mentioned above, since bolt holes for mounting are pre-machined in the pedestal, it is necessary to carefully adjust the mounting position of the pedestal at the installation site.

In order to avoid this, it is conceivable to make the bolt hole a long hole, but since the long diameter of the long hole cannot be increased unnecessarily, there is a limit to how long the hole can be used.

In addition, if you are adding a rack to an existing rack, or are using an existing rack to install a rack of a different model than the one you currently have, make new bolt holes on the rack for mounting the rack. Must.

If the existing rack is located at a relatively high location, machining the bolt holes described above is dangerous and difficult.

Furthermore, it is difficult to provide sufficient anti-corrosion measures to the newly created bolt holes as described above.

Furthermore, for example, the radius of curvature of the cable laying route is 100 m.
For gently curved sections, the curved section is approximated by a folded line rack arrangement using short straight racks with multiple tubes. Mounting the rack using bolt holes becomes difficult.

The present invention was developed based on the above-mentioned circumstances, and provides a cable rack fixing fitting that does not require providing bolt holes for mounting on the frame.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

1 and 2, only one master girder located on both sides of the rank is shown as 1, and the rack connects the master girders on both sides and is made up of a plurality of master girders distributed in the longitudinal direction of the master girder. It has child beams and is laid out in the form of a ladder.

At the lower part of the main girder 1, a gutter-like part 3 having a longitudinal notch 2 on the lower surface and a horizontally long rectangular cross section is provided.

The rack is placed with the lower surfaces of the gutter-like portions 3 of the main girders 1 on both sides placed on the upper surface of an angle-shaped pedestal 4 that projects perpendicularly to the wall surface, and is fixed by the fixing metal fittings of the present invention described below.

That is, the fixing fitting 5 includes a frame body 6 having a U-shaped cross section and a side wall parallel to the side wall of the gutter-like portion 3 of the main girder 1.

The frame has a deep U-shaped cross section at one end, and a shallow U-shaped cross section toward the other end.

Each side wall of the shallow U-shaped end is provided with a plurality of serrated projections 7, and the deep U-shaped end is provided with a fulcrum plate that stands vertically from the end of the frame bottom plate 8. 9 is the setting.

There is a through hole 10 in the frame bottom plate 8 near the fulcrum plate 9.
is the provision.

The fixture of the present invention is used as follows.

1. First, insert the bolt head 11a of the bolt 11 into the gutter-like part 3 of the main girder 1.
and attach the bolt 11 to the main girder 1.

If the bolts 11 are hexagonal head bolts, the distance between opposing sides of the hexagon is smaller than the inner dimension between both side walls of the gutter-like part 3, and the maximum diagonal is larger than the inner dimension, and the required number of bolts 11 are Insert from the 1st end of the girder.

In addition, if the bolt 11 is a diamond-shaped bolt and the shorter diagonal of the rhombus is smaller than the width of the notch 2 and the longer diagonal is larger than the width of the notch 2, the longer diagonal is the longitudinal direction of the notch 2. By matching, the head 11a of the bolt 11 can be inserted into the gutter-like part 3 of the main girder 1 at the required position.

A through hole 10 is inserted into the bolt 11 attached to the main girder 1 as described above.
are engaged, and the frame body 6 is arranged so that its serrated projections 7 are opposed to the lower surface of the pedestal 4, and the upper end of the fulcrum plate 9 is opposed to the lower surface of the main girder gutter-shaped part 3.

In this state, the nut 12 is screwed onto the bolt 11 and tightened.

Then, the frame 6 acts as a lever with the abutting part between the fulcrum plate 9 and the lower surface of the trough 3 as a fulcrum, and the penetration part of the bolt 11 as a point of force, and the serrated projections 7 are firmly attached to the lower surface of the pedestal 4. Pressed.

As a result, the serrated projections 7 bite into the lower surface of the pedestal 4, and the rack is securely fixed to the pedestal.

As mentioned above, according to the fixing bracket of the present invention, the rack can be fixed without providing mounting bolt holes in the frame.
There is no need to carefully adjust the mounting position of the frame at the installation site.

Further, even when constructing a rack using an existing frame or installing a rack of a different type, there is no need to perform work at high places, which is difficult and dangerous.

Furthermore, even if the gently curved portion of the cable installation route is approximated by a short straight rack in the form of a broken line, the rack can be easily attached to the frame.

FIG. 3 shows another embodiment of the invention.

In this embodiment, instead of the serrated protrusions 7 in the embodiment shown in FIG.
A bolt 13 having a concave portion 13a at its tip and a circumferential edge 13b at its tip is screwed into the frame bottom plate 8.

Even in this embodiment, the circumferential edge 13b bites into the lower surface of the pedestal 4, and the rack can be securely fixed to the pedestal 4.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line ■-■, and FIG. 3 is a front view of the main parts of another embodiment. 1... Main girder, 2... Notch, 3... Gutter-shaped part, 4...
- Frame, 5... Fixing metal fittings, 6... Frame body, 7... Serrated projections, 8... Frame body bottom plate, 9... Fulcrum plate, 11.
...Bolt, 12...Natsuto.

Claims (1)

[Scope of utility model registration request] The one end of the frame has a deep U-shaped cross section and a shallow U-shaped cross section at the other end, and a fulcrum plate that stands up from the end of the bottom plate of the frame toward the U-shaped opening is provided. The other end is provided with a sharp protrusion that similarly protrudes toward the U-shaped opening, and the upper end of the fulcrum plate faces the lower surface of the rack main girder, the upper end of the protrusion faces the lower surface of the frame, and the head is placed on the lower surface of the main girder. A cable rank fixing fitting characterized in that a bolt with the parts engaged is passed through the bottom plate near the fulcrum plate of the bottom plate, and a nut is screwed onto the bolt to tighten it.