JPH03100270A - Formation of sleeve for dloor penetrating piping - Google Patents

Abstract

PURPOSE:To improve the execution performance by fitting and fixing a cylindrical sleeve which is shorter than the thickness of a slab into a cylindrical elastic body. CONSTITUTION:An elastic body 12 is made of hard rubber, and the outside diameter is formed nearly equal to the inside diameter of a sleeve pipe 17, and a cylindrical form having a height of about 35 mm is formed, and a plurality of annular grooves 12a are formed on the outer peripheral part. Then, the elastic body 12 is fixed by driving a nail into a fixing nail hole 16, and a slab iron reinforcement 11 is arranged in a mold frame, and the cylindrical sleeve 17 which is shorter than the thickness of the slab is fitted onto the elastic body 12, and a rubber tape 15 is attached onto the upper surface. Then, concrete 19 is laid, and after hardening, a covered hole 18 is formed from the pipe 17 and a concrete cover in the upper part of the pipe 17. In the piping construction, the cylinder 17 is withdrawn by forming an opening by breaking the cover part of the covered hole 18. Therefore, the installation with high precision is permitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for forming a sleeve for through-floor piping for installing equipment piping through the slab surface of an apartment, building, or the like.

(Prior art) Conventionally, in order to install piping in the vertical direction through the slab surface of an apartment or building, as shown in Fig. 8, slab reinforcements 1 are arranged on the slab formwork and then placed at predetermined positions. A paper void 2 is installed, and a void fixing nail 4 is driven into the slab formwork plywood 3 to prevent the void 2 from moving. At this time, the upper part of the void 2 protruding from the slab surface is bent inward to drain rainwater. After placing reinforcement reinforcing bars (not shown) around this void 2, concrete is poured, and once the concrete has hardened, the void 2 is removed and a hole for piping is made. When installing equipment piping, the curing was removed and the piping was run through this hole.

Moreover, instead of bending the upper part of the void 2 inward, as shown in FIG. 9, packing tape was pasted on the top surface of the void 2 to prevent rainwater and other items from entering through the void 2.

(However, according to the conventional example described above, the void 2 was installed after the slab reinforcement 1 was placed, so if the slab reinforcement 1 is placed at the installation position of the void 2, The reinforcement position was shifted or cut by bending the void 2. Also, since the void 2 is made of paper, it is susceptible to water, resulting in water leakage or deformation during concrete pouring. There were problems such as concrete flowing into the interior and workers tripping over the voids 2 protruding from the slab surface.

Furthermore, if the construction process is delayed for some reason, there is a risk that the void installation time may have to be shortened.

In view of these circumstances, conventionally, for example, as shown in FIG. 10, the void 2 is removed after the concrete has solidified, and the opening of the formed piping hole is covered with a plywood 7 having a slip stopper 6. The surrounding area was also fixed with mortar.

However, even with this, when installing the void 2, the fixation with the nails 4 to the formwork plywood 3 was weak, and since the void 2 protruded from the top surface of the slab, it was not possible to finish the slab with a machine. There were still problems such as the floor surface not being finished neatly when plastering.

This invention was made to solve the problem of refusing.
The purpose is to form a piping sleeve on the slab surface with high precision, shorten the construction time, reduce the impact on other industries, and further reduce the need for sanding work. An object of the present invention is to provide a method for forming a piping sleeve.

(Means for Solving the Problems) In order to achieve the above object, the method of the present invention includes a step of removing dirt after completion of slab formwork in formwork work, and positioning and fixing a cylindrical elastic body at a piping position. , a step of simultaneously arranging slab reinforcing bars and necessary reinforcement reinforcing bars, a step of fitting and fixing a cylindrical sleeve shorter than the thickness of the slab into the elastic body, and a step of placing concrete in the slab formwork. and a step of removing the concrete cover on the upper part of the buried cylindrical sleeve pipe to open it and removing the cylindrical sleeve pipe at the time of equipment piping after the concrete hardens. do.

(Function) With the above configuration, according to the present invention, the cylindrical elastic body is positioned and fixed before placing slab reinforcing bars. Therefore, when placing slab reinforcing bars, a reinforcement worker does not have to worry about the piping sleeve position. This can be recognized in advance, and therefore it is possible to avoid this piping sleeve position and place reinforcement along with reinforcing bars.

Furthermore, when the cylindrical sleeve tube is fitted into the elastic body,
The cylindrical sleeve can be easily fitted due to the expansion and contraction of the elastic body, and after fitting, the cylindrical sleeve is firmly fixed due to its elasticity.

Furthermore, since the cylindrical sleeve pipe is formed to be shorter than the thickness of the slab, the cylindrical sleeve pipe is buried after concrete is placed and there is no opening on the slab surface, so there is no risk of water leakage from this pipe. There is no risk of this happening.

Furthermore, during piping, a complete sleeve for piping can be easily formed by punching the concrete cover at the top of the buried cylindrical sleeve pipe with a tool and removing the cylindrical sleeve pipe. .

(Example) Hereinafter, preferred examples of the present invention will be described based on the drawings.

Examples of the construction method of the present invention are shown in Figures 1 to 5.

A characteristic feature of the present invention is that it includes the steps of removing smudges after completion of the slab formwork in the formwork work, and positioning and fixing a cylindrical elastic body at the piping position.

In FIG. 1, the sleeve piping position is marked on the slab formwork plywood 13 when removing the edges, and the cylindrical elastic body 12 is fixed here with nails 14. In this embodiment, the elastic body 12 is made of hard rubber, and has a cylindrical shape with an outer diameter substantially equal to the inner diameter of a sleeve tube 17, which will be described later, and a height of about 35 vs. Further, a plurality of annular grooves 12a are formed on the outer circumference of the elastic body 12, and the formwork plywood 13
A nail hole 16 for fixing is provided. Said annular groove 12
A is for making it easy for the sleeve pipe 17 to fit in and securely fixing it.

Further, the present invention is characterized in that it includes a step of arranging slab reinforcing bars and necessary reinforcing bars.

That is, in FIG. 2, after the elastic body 12 is fixed, the slab reinforcing bars 11 are arranged within the formwork. In this case, since the columnar elastic body 12 is already fixed at a predetermined position of the formwork plywood 13, the reinforcement worker can recognize in advance that a piping sleeve will be provided here.
For this reason, reinforcing bars are placed avoiding this location. Note that reinforcing reinforcing bars (not shown) are arranged around the piping sleeve installation position as necessary.

Furthermore, the present invention is characterized in that it includes the step of fitting and fixing a cylindrical sleeve tube having a diameter shorter than the thickness of the slab into the elastic body.

That is, in FIG. 3, a cylindrical sleeve tube 17 is fitted into the elastic body 12 so as to cover it from above. This cylindrical sleeve pipe 17 has a hollow cylindrical shape as shown in FIG. 7, and is made of vinyl chloride pipe made from recycled equipment.
5 is attached. By covering the upper surface of the cylindrical sleeve pipe 17 in this manner, concrete can be prevented from flowing into the sleeve pipe 17 during concrete pouring. As described above, the plurality of annular grooves 12a are formed on the outer circumferential portion of the elastic body 12, so that the cylindrical sleeve tube 17 can be easily inserted into the tube because it expands and contracts due to its elasticity. It can be held firmly due to its elasticity.

The cylindrical sleeve pipe 17 is formed at a height h that is shorter than the thickness of the slab (thickness t in FIG. 4). In this embodiment, the difference (t-h) is approximately 51. It is set.

Next, the present invention is characterized in that it includes the step of pouring concrete into a slab formwork.

In FIG. 4, when concrete 19 is poured into the formwork, the height h of the cylindrical sleeve pipe 17 is set to be shorter than the slab thickness t, so the cylindrical sleeve pipe 17 The entire structure will be buried in concrete.

Further, the present invention is characterized in that the method includes the step of removing the concrete cover on the upper part of the buried cylindrical sleeve pipe to open it and removing the cylindrical sleeve pipe when piping the equipment after concrete hardens.

In Fig. 5, after the concrete has hardened, a covered hole 18 is formed by the cylindrical sleeve pipe 17 and the concrete lid on its upper part when demolding the slab formwork, but this state must be maintained until piping work is carried out. This can prevent leakage, intrusion of dirt, etc., and fall. Incidentally, the sleeve pipe 17 may be provided with a cut of 17 degrees around the circumference in the axial direction, for example, to facilitate separation from the concrete.

In addition, when performing piping work, first tap the lid of the covered hole 18 with a hammer or the like (thereby breaking the concrete lid and opening it, and removing the cylindrical sleeve pipe).

As explained above, according to the embodiments of the present invention, the construction time for forming a piping sleeve can be significantly shortened, and materials such as vinyl chloride pipes diverted from equipment materials can be used as cylindrical sleeve pipes. is reused and material costs are reduced. In addition, when the cylindrical sleeve pipe is removed after concrete pouring, the piping sleeve does not penetrate through it, so there are no accidents caused by items falling from the piping sleeve, and the sleeve pipe protrudes from the slab surface. This also has the advantage of eliminating accidents caused by workers stumbling and falling. Furthermore, according to this embodiment, since the construction method is simple, the difference between skilled workers and apprentice workers is reduced, and the construction quality is made uniform.

(Effects of the Invention) As explained above, the present invention includes the process of removing the smudges after the completion of the slab formwork in formwork work, positioning and fixing the cylindrical elastic body at the sleeve pipe installation position, and the necessary steel reinforcement for the slab. a step of arranging reinforcement reinforcing bars, a step of fitting and fixing a cylindrical sleeve pipe with a diameter shorter than the thickness of the slab into the elastic body, and a step of pouring concrete into the slab formwork,
At the time of equipment piping after the concrete has hardened, the step of removing the upper concrete cover of the buried cylindrical sleeve pipe, opening it, and removing the cylindrical sleeve pipe allows the piping sleeve to be shortened on the slab surface. It can be formed in a short time and with high precision. Further, since the sleeve pipe etc. do not protrude upward from the slab surface, the slab surface can be finished neatly and furthermore, the occurrence of cutting work can be prevented.

[Brief explanation of drawings]

Figures 1 to 5 are views showing an embodiment of the method of the present invention, Figure 6 is a view showing the appearance of the elastic body, Figure 7 is a view showing the appearance of the cylindrical sleeve tube, and Figures 8 to 10. The figure shows a conventional method of forming a sleeve for floor penetrating piping. 1.11... Reinforcing bars for slabs Figure 1 Figure 2 12 ・ ・ ・ 3 13 ・ 17 ・ ・ 18 ・ ・ 19 ・ ・ ・ ・Elastic body, formwork plywood, cylindrical sleeve pipe, lid Hole/Concrete (1 idiot) Figure 3 3 4 Figure 7 Chiku 6 Figure 10 Figure Procedure amendment (voluntary)

Claims (1)

[Claims] After completing the slab formwork in formwork construction, removing the smudges,
A process of positioning and fixing a cylindrical elastic body at the piping position, a process of arranging reinforcing bars for the slab and necessary reinforcing bars, and a process of inserting a cylindrical sleeve pipe that is shorter than the thickness of the slab into the elastic body. a step of pouring concrete into the slab formwork; and a step of pouring concrete into the slab form; and after the concrete has hardened, at the time of equipment piping, removing the concrete cover on the upper part of the buried cylindrical sleeve pipe to open the cylindrical sleeve. A method for forming a sleeve for floor-penetrating piping, comprising the steps of: removing the pipe;