JPH06136944A - Construction method of duct piping and actual pipe corresponding type sleeve - Google Patents

Abstract

PURPOSE:To dispense with the ensuring of a clearance, use a sleeve with a necessary minimum diameter, solve a limitation on structure, simplify piping work and repairing work as much as possible, and realize overall cost reduction. CONSTITUTION:Blind plug 7 are fitted to the other end parts of metal pipes of an inner pipe 4 and an outer pipe 5 the end parts of which are mutually fitted in such a manner as to be capable of sliding. The blind plug 7 has a bolt hole, and the cap 7 is fixed to the inside of a beam form 10 through the bolt hole by a bolt 13, whereby the metal pipes are arranged as a sleeve in the form 10, and after concrete placing and form removal, the metal pipes are used as an actual pipe for duct.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for piping a beam through duct and a sleeve for a real pipe used for the method.

[0002]

2. Description of the Related Art When a duct is made to penetrate a reinforced concrete beam, a sleeve is arranged in the beam form and a through hole for inserting the duct in the concrete is secured by the sleeve.

A void sleeve made of paper is often used for this sleeve because of its easiness of dimensioning.

[0004]

In the construction using such a conventional void sleeve, it is necessary to make the sleeve diameter one size or two sizes larger than the duct diameter in order to insert the duct later. In some cases, it may be structurally unfavorable, such as being caught in the plastic hinge region of the beam.

Further, as shown in FIG. 6, since an air space is generated around the duct 1, it takes a long time to fill the hole with the mortar 2 and the like, and the hole filling operation is unfavorable in the working posture and is likely to be an unsafe action. Furthermore, since there is a clearance, it is easy to create a work rework location and an easy work. Especially, in the case of one size upgrade, the clearance is small, so if multiple ducts are lined up, it will be a major rework.

In addition to this, external repair and sealing 3 are required, and the void sleeve has a low material cost, but there is a problem that labor cost becomes expensive.

The object of the present invention is to eliminate the inconveniences of the above-mentioned conventional examples, eliminate the need for clearance, only require a sleeve with the smallest diameter, structural restrictions are eliminated, and piping work and repair work can be simplified as much as possible. An object of the present invention is to provide a duct piping method capable of realizing down and a sleeve for a real pipe used for the method.

[0008]

In order to achieve the above object, the present invention enables a blind lid to be removably attached to the other end of a metal pipe whose ends are slidably fitted to each other. , The blind lid is provided with a bolt hole, and the blind lid is bolted to the inside of the form through the bolt hole to dispose the metal pipe as a sleeve in the form, and after concrete placing and demolding. ,
The gist is to use the metal pipe as a real pipe of a duct.

[0009]

According to the present invention, the metal pipe can be set in the mold by adjusting the degree of fitting of the ends to each other so that the entire length of the metal pipe matches the width of the mold. Further, since the metal pipe as the sleeve is used as the actual duct, it is not necessary to take a clearance, and the work of filling the through portion is unnecessary.
Furthermore, the duct connection is only plugged in, improving work efficiency and saving labor.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a side view showing an embodiment of a duct piping method of the present invention and a sleeve for a real pipe used therein.

First, the sleeve for a real pipe of the present invention will be described. As shown in FIGS. 2 and 3, an inner pipe 4 and an outer pipe made of rolled steel for general structure are used as a pipe that can be used as a real pipe. The metal pipes of 5 and 5 are fitted to each other so that their ends are slidable.

Inside the other end of each of the inner pipe 4 and the outer pipe 5, a mounting member 6 made of a metal piece bent at a substantially right angle is attached by spot welding or the like, and the bent portion of the mounting member 6 is attached to the inner pipe. 4. Claw-like projections are provided on the inner circumference of the outer tube 5 at appropriate intervals. Further, a screw hole is formed in this protruding piece.

Reference numeral 7 in the drawing is a blind lid having the same outer diameter as the inner diameters of the inner pipe 4 and the outer pipe 5, which is also made of rolled steel for general structure. The nut 8 is attached. A screw hole is formed near the outer periphery of the blind lid 7.

In this way, the blind lid 7 is detachably attached to each end of the inner pipe 4 and the outer pipe 5 by fastening the screws 9 to the mounting member 6.

Bolt holes 12 are formed at predetermined positions on the side surface of the beam form 10, and although not shown, the inner pipe 4 and the outer pipe 5 are temporarily fixed to the beam prefabricated rebar.

Then, the inner pipe 4 and the outer pipe 5 are stretched, and the bolt 13 is inserted into the nut 8 of the blind lid 7 through the bolt hole 12, and the washer 14 and the nut 15 are attached to the bolt 13 outside the beam form 10. Is fitted and the bolt 13 is tightened to fix the blind lid 7 to the inside of the mold 10. As a result, the inner tube 4 and the outer tube 5 are fixed in the mold 10 via the blind lid 7.

When the fixation of the inner pipe 4 and the outer pipe 5 is confirmed, an aluminum tape 16 for duct is wrapped around the fitting ends of the inner pipe 4 and the outer pipe 5 to prevent the concrete paste from entering.

After placing concrete on the beam form 10, the beam form
The nut 15, washer 14, and bolt 13 are removed from the outside of the beam 10, and the beam form 10 is disassembled, and then the blind lid 7 is removed.

As shown in FIG. 5, the duct pipe 17 and the vent cap 18 are inserted into the inner pipe 4 and the outer pipe 5, and the heat-resistant sealing 19 is applied to complete the construction. If the fitting 6 interferes with the insertion of the duct pipe 17 or the vent cap 18, it should be removed or bent to make it flat.

[0020]

As described above, the duct pipe construction method of the present invention and the sleeve for a real pipe used for the duct pipe construction method do not require clearance, only require a sleeve having a minimum diameter, and structural restrictions are eliminated. is there.

Further, the piping work and the repair work can be simplified as much as possible, and the cost can be reduced as a whole.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a duct piping method of the present invention and a sleeve for a real pipe used for the method.

FIG. 2 is a side view of the sleeve for a real pipe of the present invention.

FIG. 3 is a vertical sectional side view of a main part of a sleeve for a real pipe of the present invention.

FIG. 4 is a front view of a sleeve for a real pipe of the present invention.

FIG. 5 is a side view after the duct is installed.

FIG. 6 is a side view showing a conventional example.

[Explanation of symbols]

 1 ... Duct 2 ... Mortar 3 ... Sealing 4 ... Inner tube 5 ... Outer tube 6 ... Mounting bracket 7 ... Blind lid 8 ... Nut 9 ... Screw 10 ... Beam formwork 12 ... Bolt hole 13 ... Bolt 14 ... Washer 15 ... Nut 16 … Aluminum tape 17… Duct piping 18… Vent cap 19… Heat-resistant sealing

Claims (2)

[Claims] 1. A metal pipe, the ends of which are slidably fitted to each other, is arranged as a sleeve in a beam form, and after the concrete is cast and demolded, the metal pipe is used as a real pipe of a duct. A duct piping method characterized by being used. 2. A blind lid is removably attached to the other ends of metal pipes whose ends are slidably fitted to each other, and a bolt hole is provided in the blind lid. A sleeve for a real pipe, characterized in that a metal pipe is arranged as a sleeve in the mold by bolting a blind lid to the inside of the mold via.