JPS62166716A - Fire-proof prefabricated construction of floor penetration - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention provides a fire-proofing method for installing cables, etc., through the floors of buildings, condominiums, and other buildings with concrete slabs. It is related to the construction method that carries out the treatment.

(Prior art) As shown in Fig. 9, this type of conventional fireproofing method involves providing a through hole 2 in a concrete slab 3 with a diameter larger than the diameter of the cable 1 to be passed through, and inserting iron into the cable 1. The pipe 4 is capped, a refractory filler 5 is backfilled into the gap, this is passed through the through hole 2, and then a refractory filler 6 is backfilled into the gap between the iron pipe 4 and the through hole 2. (Problems to be Solved by the Invention) However, according to such means, the following problems exist.

First, fireproof filler 5. It takes a lot of time to backfill the cables and 6, and it takes a lot of effort and effort when running multiple cables.
It took time. Also, when backfilling the refractory filler 6,
Since there is a difference in diameter between the iron pipe 4 and the through hole 2, it is necessary to separately install a support 7 on the underside of the concrete slab 3 to prevent the fireproof filler 6 from falling, and as a result, the concrete slab 3 A series of operations had to be carried out from both sides, above and below.

(Means for Solving the Problems) This invention has been made in view of the above points, and as for its specific configuration, when the vertically divided blocks that are created inside the block are combined, the wire can be connected. A vertical hole is formed in the center through which the cable to be inserted can be inserted, and when these vertically divided blocks are combined, the overall external shape becomes an inverted truncated pyramid or an inverted cone with approximately the same external shape and the same size as itself. A block formwork material in the shape of a stand is installed at the desired location of the slab reinforcement before concrete placement, that is, the location where the cable is to be routed, and when concrete is placed on the slab reinforcement. Concrete or the like is also injected into the inside of the block form material, and after the concrete dries, the block form material is pulled up and the completed block is taken out. Then, the cable to be routed is coated with a fireproof seal, and this is inserted into the through hole of the concrete slab created by the block form material, and then the block is pushed from above into the vertical hole formed by the block. , which is characterized by holding the cable to be wired.

(Function) The through-hole created in the concrete slab by the block formwork material has an inverted trapezoidal longitudinal section, and a cable coated with a fireproof seal is inserted into this through-hole to create a shape similar to that of the through-hole. When a large and somewhat small block is pushed in from above, it is like driving a wedge, and the cable, which is held in the vertical hole formed by the block, is firmly held. Also, this series of operations will be performed from the upper side of the concrete slab.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show block formwork material 11 used in the example.
0, and this block formwork material 11 has a west side 12.
The outer shape surrounded by 13, 14, 15 and the bottom surface 16 is an inverted truncated pyramid shape, and at the center of the bottom surface 16.

A cylindrical iron pipe 17 having through holes 17a and 17b facing each other on the upper and outer sides thereof is erected, and partition walls are provided between the outer sides of the iron pipe 17 and the inner sides of the side surfaces 13 and 15 that face each other. 18 and 19 are erected from the bottom surface 16.

As shown in FIG. 3, the block formwork 11 constructed in this way is placed at a desired location in the slab reinforcement field before concrete placement, that is, at a location where the cable will be routed in the future. The block formwork material 11 is fixed by driving an appropriate number of fixing nails ρ from the bottom surface 16 of the block formwork material 11 toward the slab formwork 21. After that ≠
As shown in the figure, the iron pipe 17 inside the slab formwork material 11
At the same time, concrete will be poured in the areas except for.

After the concrete B has dried, a pulling rod U is inserted between the holes 17a and 17b provided in the iron pipe 17 of the block form material 11, and the block form material 11 is pulled up in the direction of the arrow shown in FIG. Thereafter, as shown in FIG. 6, the concrete blocks 25a and 25b completed inside are pulled out from the block form material 11.

, = h, the part of the cable to be routed through which it passes through that concrete slab 23' is coated with a fireproof seal n, and this is applied to the inverted truncated pyramid-shaped through hole created by the block form material 11. Pass the wire through, and then connect the 7th wire from above.
Concrete blocks 25a, 2 in the direction of the arrow in the figure
5 Push in b〇 Figure R shows how the facility will look after completion.As is clear from the figure, the cable 26 is made up of concrete blocks 25a and 25b. It is firmly clamped in the vertical hole 29 made by. Also, the cable passage points are fireproofed with a fireproof seal.

This embodiment has the above-mentioned configuration, and all the construction can be done from above the floor surface, and it is extremely easy to install.
/I! iConcentrate on simple tasks. Therefore, no matter how many wires are connected, the same finish can be achieved no matter which worker is doing the work.

Moreover, the block formwork material 11 can be reused any number of times.

It is also highly economical. In addition, in order to manufacture the blocks 25a and 25b that are compatible with the through holes on site, the Tr1/1 degree is high, and the blocks 25a and 25b are manufactured at the same time as the slab reinforcement is placed and the concrete machine is placed. Therefore, no special work is required for manufacturing the blocks 25a and 25b.

(Effects of the Invention) According to the present invention, all construction work can be performed from one side, that is, from above the floor surface, making it extremely simple. In addition, the finished surface can be uniformly finished at each location, so that it does not interfere with other subsequent construction work.

In addition, the block formwork material can be used for other purposes many times, and it is also economically efficient, as it does not require special individual work for block manufacturing, and the practical aspects of this invention include simple work and time-consuming work. The effects are high.

[Brief explanation of drawings]

1 and 2 are a side view and a plan view, respectively, of block formwork materials used in the examples, and FIGS. The figure is a side sectional view showing the construction status of the example, Figure 6 is a side sectional view of the same main part, and Figure 7 is a side sectional view showing the construction status of the example.
The figure is a partial cross-sectional view of the same side, Figure R is a partial cross-sectional side view showing the state of completed construction, and Figure 9 is a partial cross-sectional side view of the conventional technology.In the figure, 11 is a block formwork material , 20 is slab reinforcement, 21 is slab formwork, 23 is concrete, n' is concrete slab, 25 a, 25 b is concrete block, is cable, n is fireproof seal, field is through hole, 4 is vertical hole It is.

Claims (1)

[Claims] When the vertically divided blocks are combined, a vertical hole is formed in the center through which the cable to be wired can be inserted, and the external shape of the combined blocks is approximately the same as the external shape of the blocks themselves. A block form material configured to form an inverted truncated pyramid or an inverted truncated cone of the same size is installed at the desired location of the slab reinforcement before concrete placement, and when placing concrete on the slab reinforcement. Concrete, etc. is also poured into the block form material, and after the concrete dries, the block form material is pulled up and the block formed inside is taken out, and the cable to be wired covered with a fireproof seal is placed.
A fireproof prefabricated construction method for floor penetration points, characterized by inserting the block into a through hole in a concrete slab created by block formwork material, pushing the block from above, and holding the cable to be routed in the vertical hole. .