JPH0514655Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cable rack bracing attachment device.

[Conventional technology]

In buildings, factories, etc., power cables are systematically routed using cable racks. This cable rack is generally placed by hanging from the ceiling or attached to the side wall with a bracket, but in pipe spaces of high-rise buildings, etc.
As shown in FIG. 9, a cable rack 52 consisting of a child girder 51 arranged in a ladder shape between two main girders 50, 50 is connected with a connecting fitting 53 with its extending direction vertical. may be installed. In the building, the cable racks 52 are generally supported at only two points by plates 56 and 56 attached to the ceiling 54 and the floor 55, respectively. However, the distance between the two points is 3~
Although it is high at about 4m, the cable rack 5
If 2 is a simple ladder type with main girders 50, 50 and child girders 51..., it will be strong against force from the front, but weak against force from the sides, and will be resistant to unexpected situations such as earthquakes. I can't respond adequately.

Therefore, in addition to the main girders 60, 60 and child girders 61..., as shown in Fig. 10, we installed a reinforced cable rack 63 by combining these with diagonal braces 62... as shown in Figure 10. ing.

[The problem that the idea attempts to solve]

Incidentally, while the standard length of the cable rack 63 is generally 3 m, the floor height, which is the height between the ceiling and the floor, is often higher than this, nearly 4 m.
In such a case, one cable rack 63 is not enough to cover the floor height of one floor, so as shown in Fig. 11, it is necessary to add another cable rack of about 1 m using the connecting fittings 64, 64, or use the same cable rack of 3 m. Connect things of the same size. In this case, the connection point will inevitably be between the floor heights. In the conventional connection structure, the main girders 60, 60 are simply connected by the continuous metal fittings 64, 64, and no braces or the like are provided between the connections. As a result, there was a risk that this connection would become a strength link and could break. Therefore, some products are custom-made with a total length of 3,750 mm, which is slightly longer than the standard length, so that the connection points are always located at the ceiling and floor. According to this method, it is troublesome in terms of separate ordering, inventory, and on-site handling, and furthermore, the cable rack itself is expensive and lacks economic efficiency.

In view of these circumstances, the object of this invention is to provide a cable rack bracing installation device that can easily improve the load bearing characteristics on the side of the cable rack without requiring special ordering. .

[Means to solve the problem]

In order to solve the above-mentioned problem, this invention provides a combination type device that is attached to the child girder in order to attach the braces that are passed between at least the cable racks, which includes at least a mounting board, a fixture, and a tightening device. The mounting board is configured to be attached to the end of the child girder with the mounting tool, and the mounting board is inserted into the protruding portion of the mounting board, and the mounting board is attached to the end of the child girder with the mounting tool inserted through the protruding portion of the mounting board. and the clamping plate is arranged on an opposite side of the brace from the protruding portion and is separately coupled to a fixture passing through the brace. The brace is tightened and fixed to the protruding portion. [Function] In this invention, the brace can be attached to the connection point by at least a combination of a mounting board, a fixture, and a tightening plate. This can be done extremely easily and reliably using a tool called ``No Welding''.

〔Example〕

This invention will be explained in detail below with reference to drawings showing embodiments thereof.

1 to 7 show an embodiment of the cable rack brace mounting device according to this invention. As seen in these figures, the cable rack 1 is provided with two main beams 2, 2, respectively. Each master girder 2 is a regular length member having a substantially U-shaped cross section, and is arranged so that its groove openings face each other. These parent digits 2,
A plurality of child girders 3... are arranged between the two.
These child girders 3... are fixed by orthogonal to the parent girders 2, 2 and each end thereof is welded into the groove corner of the parent girder 2, and is fixed in the direction in which the parent girders 2, 2 extend. are arranged parallel to each other at regular intervals. These sub-spars 3 are shaped like a U-shape in cross section and are composed of a bottom wall 3a, rising walls 3b, 3b, lips 3c, 3c, and inner protrusions 3d, 3d. The end of the bottom wall 3a rests on the side wall of the corner and is fixed, and the groove opening 3e
is directed in the direction between the opposite sides of the parent girders 2, 2. The width of the groove opening 3e of each child beam 3 is A, and the inner width of the rising walls 3b, 3b is B.
A mounting board 4 is attached to the end of each child beam 3. This board 4 is a plate having a constant width and having a shape similar to a hat-shaped steel section defined by JIS, and its center portion has a U-shaped base 4a that fits into the child girder 3 from the opening 3e side. and the same base 4a
The part extending horizontally from both ends of the lower part is the protruding part 4b,
It is said to be 4b. A recess 4c is formed in the center of the upper wall of the base 4a, and a simple circular through hole 4d is provided in the center, and a similar through hole 4e is provided in each of the protrusions 4b. is provided. Note that the through hole 4e is a hole opened in a recessed portion 4f that projects downward. The mounting board 4 has a screw (mounting tool) 6 with a washer 5 in the through hole 4d of the base 4a, and a screw (mounting tool) 6 with a washer 5 in the through hole 4d of the base 4a.
Screws (attachments) 8 with washers 7 are inserted through the through holes 4e, respectively. The screw 6
has a tightening nut 10, and each of the other screws 8
A tightening plate 12 is attached to each.
As shown in FIG. 5, the tightening nuts 10 are generally rectangular plates having a screw hole 10a in the center, and are all common. Same nut 1
0, the smaller width is the length a, which is smaller than each width A of the groove opening 3e of the child beam 3 and the groove opening 15e of the brace 15, which will be described later. The larger width of the tightening nut 10 has a length B', and this B' is approximately the same dimension as the inner width B of the child beam 2 and the brace 15. This substantially same dimension means that the tightening nut 10 fits loosely into the child beam 2 and the brace 15. The screw hole 10a is provided at the longer end of the tightening nut 10 at a diagonal position.
Arc-shaped rounded parts 10b, 10b are provided with the center at
It is located on the circle B′. Recesses 10c, 10c are provided on both sides of the nut 10 across the screw hole 10a, into which the inner protrusions 3d, 3d of the child beam 3 are fitted from below. Note that the diagonal length C between the corners of the nut 10 is made larger than the maximum width of the child beam 3. The brace 15 is formed of a profile having the same cross-sectional shape as the child beam 3, and includes a bottom wall 15a, rising walls 15b, 15b, and a lip 15.
c, 15c and inner protrusions 15d, 15d, a groove opening 15e is provided between the inner protrusions 15d, 15d, and a through hole 15f is provided between the end widths of the bottom wall 15a. . The tightening plate 12 is formed by bending a plate into an L shape.
One side is the seat part 12a, and the other side is the receiving part 1.
2b, a screw hole 12 is arranged in the center of the seat part 12a, and the seat part 12a is
There are folded ribs 12d, 12d on both sides of a.
is formed.

A screw 6 is passed through the through hole 4d of the mounting board 4 from above before setting it on the child beam 3, and a tightening nut 10 is loosely screwed onto the screw 6. The tightening nut 10 in the base portion 4a has its larger width facing the direction in which the child spar 3 extends, so that the narrow end thereof is parallel to the groove opening 3e of the child spar 3 and is inserted into the same opening 3e. It's starting to get passed. The mounting board 4 is set so that its base portion 4a is fitted into the sub-spar 3, and the recessed portion 4c is fitted into the groove opening 3e of the sub-spar 3 such that it cannot rotate. Note that both protrusions 4b, 4b are positioned substantially parallel to one end of the main beam 2. The mounting board 4
After being set on the sub-girder 3, the screw 6 is tightened. As a result, since the tightening nut 10 in the child spar 3 has rounded portions 10b, 10b, the screw 6
As a result, the same nut 10 rotates 90 degrees and straight parts 1 at both ends in the long direction.
0d and 10d come to abut parallel to the inner surface of each rising wall 3b of the child beam 3 and stop. When the screw 6 is further rotated, the tightening nut 10 is lifted with the straight portion 10d in contact with the inner protrusion 3b, and its recesses 10c and 10c fit into the inner protrusions 3d and 3d of the child beam 3. In this way, the child digit 3 is strongly
It becomes possible to tighten it. The screw 6 has a sharp tip 6a, and the length L from the lower end of the head of the screw 6 to the tip 6a.
is 1 mm longer than the length H from the lower end of the head to the inner surface of the bottom wall 3a of the child beam 3. Therefore, when the screws 6 are strongly tightened and the mounting board 4 is completely fixed to the child beam 3, the tip portion 6
a digs into the bottom wall 3a of the sub-girder 3 by about 1 mm to securely fix the mounting board 4. Two braces 15, 15 are attached to this mounting board 4. The groove opening 15e of this brace 15 is directed toward the protrusion 4b, and the tightening plate 12 is placed against the back of the brace 15. Said brace 15
With the through hole 15f and the screw hole 12c of the tightening plate 12 aligned, the screw 8 is passed through the through hole 4e of the protrusion 4b, and the screw 8 is
It is screwed into the screw hole 12c of the tightening plate 12 through the through hole 15f of the brace 15. When the screw 8 is rotated, the tightening plate 12 is tightened toward the protrusion 4b, and the brace 15 is tightened to the mounting board 4 so that the recess 4f enters into the groove opening 15e. The ribs 12d of the tightening plate 12 are located on both sides of the brace 15, and support the brace 15 while reinforcing the tightening plate 12.
Since the braces 2b abut against the end faces of the braces 15 so as to close them, displacement of the braces 15 in the extending direction is reliably prevented.

As shown in Fig. 7, the brace mounting device consisting of these is attached to one end of each of the child girders 3 arranged between the parent girders 2 and 2, and the braces 15
In addition to being used for mounting ......, as shown in Figure 1, the connection fittings 20, 2 are
It is also used for installing braces 15 between the connections of cable racks 1, 1 which are vertically connected at 0.

As mentioned above, according to the cable rack brace installation device according to the present invention, braces can be firmly installed between cable racks connected by the connecting tool, so that the connection points are effectively reinforced and the lateral This makes it possible to use standard length cable racks as they are without having to custom order long cable racks that match the floor height. The bracing attachment device includes at least a combination of a mounting board, a fixture, and a tightening plate, and the mounting board is attached to an end of the child girder with the fixture, and the mounting board has a protrusion. The fitting is inserted through the part of the brace, and the tightening plate is arranged on the opposite side of the brace from the protruding part. By screwing into the fixture that penetrates the brace, the brace is tightened and fixed to the protruding part, so even after the cable rack is installed, labor-intensive work such as welding can be avoided. You can easily install braces without having to rely on them.

In the above embodiment, the bracing installation device was attached to all of the child girders, so that braces were provided between all the child girders, but the device was installed on every child girder. Alternatively, as shown in FIG. 8, the braces may be arranged diagonally so that two or more of the same devices are installed. In the embodiment described above, the attachment device according to the invention was also used for the braces arranged on the cable rack itself, but these braces may also be attached by other means such as welding. In the above embodiment, the braces provided between the cable racks were arranged between the child girders provided at the ends of each cable rack, but the braces were arranged between the child girders provided at the ends of each cable rack. Sometimes. Although the protrusions of the mounting board protrude from the base on both sides, they may protrude only on one side.

[Effect of idea]

Since the cable rack brace mounting device according to this invention is constructed as described above, it has become possible to easily improve the load bearing characteristics of the cable rack on the side without having to make a special order.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the cable rack brace mounting device according to this invention, Fig. 2 is an enlarged view of its main parts, and Fig. 3 is the same as Fig. 2.
A line sectional view, FIG. 4 is a view taken from the direction of FIG. 2, and FIG. 5 shows the tightening nut taken out.
Figure a is its front view, figure b is its side view, and
The figure shows the tightening plate taken out, figure a is its front view, figure b is its sectional view, figure 7 is a front view of the cable rack of figure 1 as a single item,
Fig. 8 is a front view showing another embodiment in which the braces are arranged differently, Fig. 9 is a perspective view showing how a conventional cable rack without braces is installed through the floor and ceiling, and Fig. 10. 11 is a front view showing a conventional cable rack of fixed length type with braces, and FIG. 11 is a front view showing how the cable racks of FIG. 10 are connected to each other. 1... Cable rack, 2... Main girder, 3... Child girder, 4... Mounting board, 6, 8... Screw (mounting tool),
12...Tightening plate, 15...Brace, 20...Connection fitting (connection fitting).

Claims (1)

[Scope of utility model registration request] It is equipped with two parallel parent girders and child girders which are connected in a crosswise manner between these parent girders and arranged at intervals in the direction in which the parent girders extend, and the ends of the two parallel girders in the extending direction are A combination device attached to said child girder for attaching braces passing between at least cable racks which are adapted to be connected by connectors, said combination device comprising at least a mounting board, a fixture and a fastener. The mounting board is configured to be attached to the end of the child girder with the mounting tool, and another mounting tool is inserted into the protruding portion of the mounting board, the clamping plate is adapted to extend through the brace, and the clamping plate is adapted to be disposed on an opposite side of the brace from the projecting portion and is releasably coupled to a fixture passing through the brace. A brace mounting device for a cable rack, wherein the brace is tightened and fixed to the protruding portion.