JPH09294318A - Installing method for cable rack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify cable rack installing work by making it possible to perform it along with concrete depositing work side by side, and making cable rack fitting work to a wall surface unnecessary. SOLUTION: A slab penetrating frame 3 is provided along the peripheral brim of an opening 2 formed at a specified position of a slab mold material 1, the slab penetrating frame 3 is fixed to a slab mold material 1, and a lid 8 covering the whole surface of an opening 2 is put on the upper surface of the slab penetrating frame 3. A slab concrete 9 is deposited on the upside of the slab mold material 1 and is cured. And when the slab concrete 9 hardens and comes to have enough strength, supporting members 10 are fixed to fitting bolts 6 provided in the width-direction on both sides of the slab penetrating frame 3. And, cable racks 12 are fixed to the supporting members 10 by fastening firmly with bolts 13 and nuts 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a cable rack for laying a cable including electric wiring in a building.

[0002]

2. Description of the Related Art A conventional method of installing a cable rack is to attach a sleeve for inserting a cable and a cable rack to a slab formwork at the time of building a slab, and form an opening by placing slab concrete around the sleeve. , Furthermore, after removing the sleeve installed after curing the slab concrete and performing interior work such as walls, after installing the cable rack on the interior wall etc., the cable for electrical wiring is laid on the cable rack. It was

[0003]

However, in the conventional method of installing a cable rack as described above, since the cable rack is supported and fixed to a dry lightweight wall for interior having low strength, There is a problem that the installed cable rack becomes unstable and the wall surface at the position where the cable rack is fixed must be reinforced as necessary.

Further, since the cable rack is properly attached at a plurality of positions along the vertical direction of the wall surface, there is a problem that work at a high place is required when the cable rack is installed above the wall surface, resulting in poor workability.

Further, since the work of attaching the cable rack is performed after the completion of the interior work, there is a problem that the work is prolonged and the construction efficiency is poor. Then, this invention was made paying attention to the above-mentioned unsolved problems of the related art, and the installation work of the cable rack can be performed in parallel with the concrete placing work, and the installation on the wall surface of the cable rack is possible. It is an object of the present invention to provide a method for installing a cable rack that does not require work and can simplify the work.

[0006]

In order to solve the above problems, the present invention provides a method for installing a cable rack extending vertically through a slab in a building. An opening is formed in the slab formwork material at the position to be arranged, a slab penetration frame is installed along the upper peripheral edge of this opening, and then slab concrete casting curing and the slab penetration are provided around this slab penetration frame. A method of installing a cable rack, in which a support member is attached to a frame and a cable rack is fixedly mounted on the support member.

Thus, the slab penetration frame installed in the opening that should penetrate the cable rack functions as a formwork for the slab concrete, and the opening is formed in the cast slab concrete, and this opening is also formed. The support member is firmly supported by the slab penetration frame fixed to the section.

Also, the cable rack is fixed to the slab opening by the supporting member attached to the slab penetration frame. In particular, if the cable rack extending to the lower side of the opening is supported by the portion extending to the lower side of the opening, it is not necessary to install the cable rack at a high place on the lower floor.

On the other hand, when the slab form material is a half precast concrete slab, an opening for inserting a cable rack can be formed in advance before installation on the site to simplify the site work. Further, in the half precast floor slab, after forming an opening in advance, after attaching the slab penetration frame and the support member to the opening, when installing the half precast floor slab on site, the slab on site The installation work of the slab penetration frame and the support member before placing concrete is unnecessary and only the installation work of the cable rack is performed.

Further, when a cable rack receiving member having a loose hole is interposed between the support member and the cable rack, the position adjustment is accurately performed with respect to the verticality of the cable rack and the like.

Further, by forming the receiving portion of the partition plate for fireproof treatment at the upper and lower ends of the slab penetration frame, the fireproofing work of the opening can be quickly performed after the cable is laid on the cable rack.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for installing a cable rack according to the present invention will be described below with reference to the drawings.

First, as shown in FIG. 1, 1 is a slab form material, and here, a half precast floor slab (hereinafter,
Half PCa floor slab) is applied, and an opening 2 is formed in advance at a predetermined position where the cable rack is to be arranged.

The size of the opening 2 is such that a cable rack can be inserted and a sufficient working space can be provided before and after the insertion. Then, the slab penetrating frame 3 is installed along the periphery of the opening 2 on the upper surface of the slab frame material 1. The slab penetration frame 3 has a folded portion 4 formed inside the upper and lower ends thereof, and the height of the slab penetration frame 3 up to the folded portion 4 is about the thickness of the slab concrete cast on site. There is. In addition, when the folding | returning part 4 is bend | folded to the outer peripheral side of the slab penetration frame 3, it should be high enough for the leveling work of the concrete cast in situ below the folding | returning part 4.

The U-shaped ductor clip 5 is provided between the lower folded-back portion 4 and the lower surface of the slab frame material 1.
The slab penetration frame 3 is fixed to the slab form frame material 1 by firmly tightening with. Also, this slab penetration frame 3
Mounting bolts 6 are inserted in two places on the upper and lower sides on both sides in the width direction, and are fixed by nuts 7 from the inside of the slab penetration frame 3.

Next, a lid 8 covering the entire surface of the opening 2 is installed on the upper surface of the slab penetration frame 3. The lid 8 is made up of two pieces that divide the opening 2 at the center in the width direction, and the lid 8 is joined to the slab through-frame 3 by screwing a predetermined position on the peripheral edge of each lid 8. To do.

In addition, as a method of joining the lid 8 and the slab through-frame 3, the folded-back portion 4 may be folded back and sandwiched at the upper end of the slab-through frame 3 other than this. Then, as shown in FIG. 2, slab concrete 9 is cast on the upper side of the slab form material 1 to be cured.

At this time, the slab penetration frame 3 functions as a slab concrete formwork, and further, the slab penetration frame 3 covers the lid 8.
The cover 8 can prevent the concrete from flowing out through the opening 2 to the lower floor, and the cover 8 can function as a drop-preventing enclosure before the cable rack construction.

After that, when the slab concrete 9 is hardened and the concrete strength is sufficiently developed, the lid 8 attached to the upper side of the slab penetration frame 3 is removed and the ductor clip 5 is removed.

Then, as shown in FIG. 3, the support member 10 is inserted into the mounting bolts 6 installed on both widthwise inner sides of the slab penetration frame 3 and fixed by nuts. Here, as shown in FIG. 4, the support member 10 is made of flat steel having a thickness of about 4.5 mm, and is 200 m above and below the slab penetration frame 3, respectively.
The cable rack extends about m and has a width of about 70 mm, which is about the width and thickness of the cable rack. In addition, elongated holes 11 for attaching the slab penetration frame 3 are provided at two central positions, and two holes above and below the elongated hole 11 are provided.
A long hole 11 for attaching a cable rack is provided at the location.

A ground wire attaching screw 17 is installed on the upper end of the support member 10. Then, as shown in FIG. 3, the cable rack 12 made of an existing product is provided on the inner side surface of the portion projecting and extending from the top and bottom of the slab penetration frame 3.
Is firmly tightened and fixed by the bolt 13 and the nut 14.

The cable rack 12 has plate-shaped vertical members 12a extending vertically on both sides, and the vertical members 12a.
The plate-shaped horizontal member 12b is provided so as to maintain the above intervals at a predetermined interval in the horizontal direction.

The cable rack 12 and each support member 1
A spring washer (not shown) is interposed between 0s so as to finely adjust the verticality of the attached cable rack 12.

Next, as shown in FIG. 5, the lid 8 removed from the slab penetration frame 3 is fixed with screws so as to cover the openings 2 in front of and behind the cable rack 12, respectively. It can be used as a scaffolding for installation work and as a fireproof partition plate until fireproofing.

In the above embodiment, the case where the slab penetration frame 3 and the support member 10 are joined by bolts has been described, but the present invention is not limited to this, and welding joining can be performed as a simple method.

In the above embodiment, the case where the slab penetrating frame 3 and the support member 10 are installed in the opening 2 of the slab frame material 1 at the site has been described.
The process order is not necessarily limited to this way,
It is possible to install the cable rack 12 only by installing the slab frame material 1 on the site in advance with the through frame 3 and the support member 10 attached to the opening 2 of the slab frame material 1.

Thus, the cable rack 12 is installed by inserting it through the opening 2 in the slab and extending in the vertical direction. By fixing it to the member 12b, the cable can be installed in the vertical direction in the building.

In this way, the cable rack 12 is
By being fixed to the support member 10 without being fixed to the wall surface or the like in the building, the cable rack 12 can be installed at any position without being installed near the wall surface in the building,
The internal space can be effectively used.

Further, the construction work can be performed in parallel with the skeleton work without waiting for the completion of the interior finishing work for walls and the like, and the construction period can be greatly shortened. Further, the cable rack 12 is completed by simply fixing the upper and lower ends thereof to the support member 10 installed in the slab opening 2 of each floor, so that the work of attaching the upper end of the cable rack 12 is directed downward from the upper floor. The work can be performed, and work at high places is unnecessary, and the work is simplified.

Next, another embodiment of the present invention will be described. As shown in FIG. 6, first, a slab form material 1 made of plywood as a normal floor form is installed below a slab concrete 9 to be constructed, and an opening 2 is formed at a predetermined position. Next, the slab rebar 13 is arranged on the upper surface of the slab form material 1, and the slab penetrating frame 3 is installed in the opening 2.

The slab penetration frame 3 is formed higher than the slab concrete 9 to be cast, and the upper and lower ends of the slab concrete frame 3 are horizontally folded back to the outer peripheral side to form a receiving portion. Can be arranged along the periphery of the opening 2.

Next, the support members 10 are fixed to the outer side surfaces of the slab penetration frame 3 in the width direction by welding or screwing. The support member 10 is formed with a relief portion 18 for the fireproof partition plate 14 which is installed on the outer peripheral side of the slab penetration frame 3, and the upper end portion thereof is bent horizontally inward.

Next, the slab concrete 9 is poured and cured. At this time, the support member 10 is buried inside the concrete to the extent that the concrete leveling work can be performed.
Then, the cable rack 12 is provided on the upper surface of the support member 10,
Cable rack receiving member 1 made of an angle member having long holes for attaching the cable rack 12 and the supporting member 10.
5 are bolted to each other. Therefore, the cable rack 12 installed by the cable rack receiving member 15 can be finely adjusted, and the cable rack 12 is accurately fixed without a gap or the like on the joint surface.

Further, since the slab penetration frame 3 is higher than the slab concrete 9 cast around it,
The water inside the slab concrete is stopped to prevent it from flowing out to the lower floor from the opening, and after laying the cable on the installed cable rack, the slab penetration frame 3 is removed from the frame along the peripheral edge. The fireproof partition plate 14 is screwed to the slab penetration frame 3 and is joined to the escape portion of the support member 10 by welding or screwing, so that the fireproofing process can be simultaneously performed.

In the above embodiment, the slab form material 1 is composed of a half PCa floor slab or plywood, but it is not limited to this and may be composed of a deck plate floor or the like.

[0036]

As described above, according to the method of installing a cable rack of the present invention, an opening is formed in the slab form material at a position where the cable rack is to be arranged, and the opening is formed along the upper peripheral edge of the opening. After installing the slab penetrating frame, the slab penetrating frame is placed and cured around the slab concrete and the supporting member is attached to the slab penetrating frame, and by fixing the cable rack to the supporting member, The cable rack can be firmly fixed to the slab opening at a predetermined position without supporting it on the wall surface in the building, greatly simplifying the installation work and supporting the cable rack by the support member of the slab opening. Since the upper and lower ends are fixed, it is possible to eliminate the work at height.

Further, an opening is formed in the slab form material in advance, the slab penetration frame and the cable rack support are attached to the opening, and then the half PCa floor slab is installed on the site, whereby the cable is Installation work is completed simply by mounting the rack, and the construction period can be greatly shortened.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a construction procedure of a cable rack installation method according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a construction procedure of a method for installing a cable rack, similar to FIG.

FIG. 3 is a side sectional view showing a construction procedure of a method for installing a cable rack, similar to FIG.

FIG. 4 is a front view showing a support member in FIG.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a side sectional view showing another embodiment of the cable rack installation method of the present invention.

[Explanation of symbols]

 1 …… Slab form material 2 …… Opening 3 …… Slab penetration frame 4 …… Folding part 5 …… Ductor clip 6 …… Mounting bolt 7 …… Nut 8 …… Lid 9 …… Slab concrete 10 …… Support Member 11 ... Long hole 12 ... Cable rack 13 ... Bolt 14 ... Nut 15 ... Cable rack support

Claims (5)

[Claims] 1. A method of installing a cable rack extending vertically through a slab in a building, wherein an opening is formed in a slab form member at a position where the cable rack is to be arranged, and the opening is formed. After installing the slab through-frame along the upper peripheral edge of the part, perform slab concrete casting curing around this slab-through frame and attach a supporting member to the slab through-frame, and attach a cable rack to this supporting member. A method of installing a cable rack, which is characterized by being fixedly installed. 2. The cable rack installation method according to claim 1, wherein the slab formwork material is a half precast floor slab. 3. The method of installing a cable rack according to claim 2, wherein the half precast floor slab is previously
A method of installing a cable rack, characterized in that an opening is formed, a slab penetration frame and a support member are attached to the opening, and then the half precast floor slab is installed. 4. The cable rack installation method according to claim 1, wherein a cable rack support member having a loose hole is interposed between the support member and the cable rack. Method. 5. The method of installing a cable rack according to claim 1, wherein receiving portions for partition plates for fireproof treatment are formed at upper and lower ends of the slab penetration frame.