JPH0223915Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial application field The present invention relates to a sleeve for forming an opening such as a ventilation hole in a wall of a building.

Conventional technology In general, sleeves for wall openings are susceptible to rainwater entering from the outdoor opening side, so conventional sleeves for wall openings have a water return installed at the bottom of the approximately central part of the sleeve body. Something was warm.

Problems that the invention aims to solve However, with the conventional sleeves as described above, the effective diameter is insufficient if a water return is provided, especially when the sleeve is of small diameter, and the external waterproofing is not possible especially when it is provided on the outer peripheral wall. Not only is it necessary, but when setting it on a temporary frame in the on-site pouring method, it is necessary to check the direction so that the water return is located at the bottom.
Further, there were drawbacks such as the sleeve moving or deforming during installation.

The present invention was developed in order to eliminate the drawbacks of the conventional wall opening sleeves mentioned above.The purpose of this invention is to have not only a water returning function but also a water draining function, and also to provide a temporary frame for use in on-site pouring methods. can be easily and reliably set up, eliminating the need for post-waterproofing,
To provide a sleeve for a wall opening that reduces costs.

[Structure of the idea]

Means for Solving the Problems The sleeve for a wall opening of the present invention has an annular step formed in the middle part of the cylindrical sleeve body, and
This sleeve body is characterized in that a flange is provided on the outside of the sleeve body to form a depressurized space between it and the poured concrete.

Embodiment Next, an embodiment of the wall opening sleeve of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a sleeve main body,
It is made of plastic material and is approximately cylindrical in shape.

Annular step portions 1a and 1b are formed at two locations in the middle portion of the sleeve body 1. A flange portion 1c is formed on the outside of the step portion 1a, and as shown in the figure, a depressurized space 2 is formed when concrete is poured.

An external cap 3 is fitted onto the outdoor opening side of the sleeve body 1, and its outer peripheral flange portion 3
a completely covers the outer end surface 1d of the sleeve body 1.

Further, an auxiliary sleeve 4 is fitted into the indoor opening side of the sleeve main body 1, and an internal cap 5 is fitted into this.

Note that 6 is concrete and 7 is a board.

Since the wall opening sleeve of this embodiment is constructed as described above, the lower side of the stepped portions 1a and 1b has the function of returning water such as rain that enters from the outside, and the upper side has the function of draining water. Demonstrate. Therefore,
No vertical direction is required when setting.

Furthermore, since the outer peripheral flange portion 3a of the external cap 3 covers the outer end surface 1d of the sleeve body 1, waterproofing is not required, resulting in cost reduction.

Further, by providing the stepped portions 1a and 1b, the structural strength of the sleeve main body 1 is increased, and it is difficult to deform even if formed with a thin wall.

Furthermore, as shown in FIG. 2, the sleeve main body 1 can be attached to the temporary frame 9 by the setting jig 8 using the stepped portion 1a during on-site pouring, so that the sleeve body 1 can be easily set to the temporary frame 9. becomes accurate.

[Effect of idea]

(1) Since the annular stepped portion is formed, the lower side of the stepped portion functions to return water such as rain that enters from the outside, and the upper side of the stepped portion functions as a drain.

(2) The sleeve body can be quickly and accurately set into a temporary frame for concrete pouring by using the stepped portion.

(3) Since the flange is provided on the outside, there is no need for waterproofing on the outside of the sleeve, resulting in lower construction costs.

(4) Since a depressurized space is formed between the concrete and the poured concrete, water that has entered due to capillary action can be prevented from penetrating into the interior.

(5) By providing a step and a flange on the sleeve,
Even if the sleeve body is made thin, sufficient strength can be obtained, and deformation due to external pressure during concrete pouring can be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the sleeve of the present invention, and FIG. 2 is a view showing the set state in the on-site casting method. 1...Sleeve body, 1a, 1b...Stepped portion, 1
c... Flange portion, 1d... Outer end surface, 2... Decompression space,
3...External cap, 3a...Outer flange part,
4... Auxiliary sleeve, 5... Internal cap, 6...
...Concrete, 7... Board, 8... Setting jig, 9... Temporary frame.

Claims (1)

[Scope of utility model registration request] A ring-shaped step is formed in the middle part of the cylindrical sleeve body, and a flange is provided on the outside of the sleeve body to form a depressurized space between it and the poured concrete. Sleeves for wall openings.