JP2002303042A - Sleeve for concrete penetrating pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sleeve, which has fundamentally solved the problem of a conventional paper cylinder sleeve generally employed in concrete of a housing foundation, is available for use in the concrete foundation, while being embedded in the same, and eliminates formation of a gap between a pipe inserted into the sleeve and the sleeve as its is, the gap raising the risk of infiltration of insects, small animals, odors, etc. SOLUTION: The sleeve 1 is for use in penetrating the pipe 11, etc., in the concrete of the housing foundation 10 or the like and has a length which is almost equal to the thickness of the concrete. The sleeve 1 has a flexible plate body 3 mounted therein in a direction that crosses an axis of the sleeve. The flexible plate body 3 has a pipe insertion hole 4 formed therein at the center thereof, and an inner diameter thereof is slightly smaller than the outer diameter of the pipe 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping sleeve buried in concrete constituting a foundation or a wall of a building or a flexible plate-shaped member used by being attached to this sleeve. In particular, a sleeve for a concrete through pipe constituted by arranging a flexible plate-like body having an insertion hole at the center thereof through which a pipe such as a plumbing pipe can be penetrated in a sleeve, or used by being attached to this sleeve. The present invention relates to a flexible plate.

[0002]

2. Description of the Related Art Conventionally, when a pipe such as a water supply / drain pipe is pierced through a concrete foundation of a building, a form width is set at a position where a predetermined distance is secured from a base reinforcing bar before setting a concrete form. By temporarily fixing a paper sleeve (a so-called void tube) cut to the same length using a plurality of wire lines and setting a mold later, the paper sleeve is pushed by the mold from both sides and horizontally. The state was fixed. Then, after the concrete was cast and cured, it was left up to the formwork to form a concrete foundation having a through hole.

[0003] As described above, if the paper sleeve is left in the concrete for a long period of time, it deteriorates or deteriorates. After the concrete foundation is hardened, the pipe of the water supply / drainage pipe penetrates the concrete foundation. I had to remove the whole before letting it go.

[0004]

However, in the prior art using the above-mentioned conventional paper sleeve, it is necessary to remove the paper sleeve embedded in the concrete from the concrete foundation, and it takes a predetermined time. There was a problem that required. Further, since the removed paper sleeve has a cement attached to its surface and cannot be reused, it has become a large amount of industrial waste, and there has been a problem that its disposal requires a large cost. For example, in a case where ten paper sleeves are used in one building, if a 10,000 building is constructed annually, there is a problem that about 150 m ³ of industrial waste is discharged.

In addition, when the above-described paper sleeve is used, a gap is formed between the pipe and the through-hole only by arranging a water supply / drain pipe or the like in the through-hole from which the paper sleeve has been removed. Small animals such as worms, rats, earth and sand, moisture,
There was a problem that odor etc. penetrated into the house interior. In addition, in order to eliminate the gap, it is necessary to fill the entire gap with mortar, and there is a problem that it takes time and effort. Furthermore, there was a problem that the filling was incomplete due to the variation in the construction.

The pipe sleeve according to the present invention is a pipe sleeve completely invented in view of the above-mentioned many problems, and is particularly flexible with a pipe insertion hole slightly smaller than the outer diameter of the pipe at the center. A sleeve provided by arranging a plate-shaped body at a predetermined position of a sleeve, which provides a completely new technique capable of inserting the pipe into a pipe insertion hole of a flexible plate-shaped body. is there.

[0007]

The sleeve for concrete penetration pipes according to the present invention is an invention which fundamentally improves many of the above-mentioned conventional problems. A sleeve for allowing a pipe such as a water supply / drainage pipe to penetrate into the concrete, the length of the sleeve being equal to the thickness of the concrete, and having a pipe insertion hole at the center slightly smaller than the outer diameter of the pipe. A sleeve for concrete penetration piping, wherein a flexible plate-like body is disposed at a predetermined position of the sleeve at right angles to an axis of the sleeve.

In the first aspect of the present invention, since the length of the sleeve of the present invention is made equal to the thickness of the concrete to be constructed, both ends of the sleeve are closely contacted with each other in the form when concrete is poured. It can be fixed in a stable state. Therefore, even when the ready-mixed concrete is poured into the formwork, the ready-mixed concrete can be prevented from flowing into the sleeve.

In addition, since a flexible plate having a pipe insertion hole slightly smaller than the outer diameter of the pipe at the center thereof is disposed in the sleeve so as to be orthogonal to the axis, the pipe is inserted through the pipe. Since it is closely contacted with the inner peripheral edge of the hole, there is no fear that a gap is formed between the two. Therefore, unlike the related art, there is no need to completely fill the gap, and there is no possibility that insects, small animals, odors, and the like will pass through the sleeve and enter the inside of the house.

[0010] As described above, the pipe inserted into the pipe sleeve is supported by the inner peripheral edge of the pipe insertion hole of the flexible plate and is loosely fitted in the sleeve. Even when the ground is slightly displaced, the force for shearing the pipe can be suppressed, and the pipe can be freely piped by being inclined at a desired arbitrary angle.

The gist of the second invention of the sleeve for concrete penetration piping according to the present invention is that the flexible plate-shaped body has a center portion formed to be thinner than an outer peripheral portion thereof. Is a sleeve for concrete penetration piping.

In the second aspect of the present invention, the central portion of the flexible plate is formed to be thinner than the outer peripheral portion.
This center has flexibility. Therefore, a pipe having a slightly larger diameter can be smoothly inserted into the pipe insertion hole provided at the center. Further, since the outer peripheral portion is formed thick, it can be firmly and stably disposed on the inner peripheral surface of the sleeve.

The gist of the third invention of the sleeve for concrete penetration piping according to the present invention is that the flexible plate-like body is arranged on the inner periphery of the sleeve or on the edge of the sleeve. The sleeve for concrete penetration piping according to the first or second aspect of the present invention, characterized in that:

In the third aspect of the present invention, since the flexible plate is attached to the inner periphery of the sleeve or the end edge of the sleeve, the sleeve for concrete through piping can be easily formed. . As described above, when the flexible plate is attached to the inner periphery of the sleeve, the contact portion between the pipe and the flexible plate is less likely to be damaged. Also,
When the flexible plate is attached to the edge, it has an effect that the attached state can be easily visually confirmed. When the flexible plate is attached to the inner periphery of the sleeve, the length of the sleeve body is made equal to the length of the sleeve. When the flexible plate is attached to the edge of the sleeve body, the sleeve body is attached. The length of the sleeve body can be easily defined by making the sum of the length of the sleeve and the thickness of the flexible plate-shaped body equal to the length of the sleeve.

The gist of the fourth invention of the sleeve for concrete through pipe according to the present invention is that the flexible plate is attached to the sleeve integrally or separately. It is the sleeve for concrete penetration piping of the first to third inventions described above.

In the fourth aspect of the present invention, since the flexible plate is integrally or separately attached to the sleeve, the former sleeve and the flexible plate are integrated. In this case, a sleeve with a flexible plate can be mass-produced at a factory in advance at low cost. In the case where the latter flexible plate is separately attached to the sleeve, the flexible plate and the sleeve are separately manufactured in advance, and these are easily combined at the construction site. Can be assembled and used.

The flexible plate for a sleeve according to the present invention comprises:
An annular fitting portion which is provided on an end edge of the sleeve or is attached separately to the sleeve, and which is fitted on an outer peripheral surface of the sleeve main body; A ring-shaped contact portion formed integrally from the outer end of the portion, having an inner peripheral diameter smaller than the outer diameter of the pipe inserted into the sleeve body, and being in close contact with the outer peripheral surface of the pipe; It is a flexible plate for a sleeve having a structure formed by the above.

The flexible plate for a sleeve has an annular fitting portion fitted on the outer peripheral surface of the sleeve main body, and a ring-shaped fitting fitted on the outer peripheral surface of the pipe inserted into the sleeve main body. Since the contact portion and the contact portion are integrally formed to form a cap, the flexible plate for a sleeve can be easily fitted to the edge of the sleeve at a construction site or the like by simply fitting the end to the end of the sleeve. Can be mounted and used. Further, by using this flexible plate-shaped body for a sleeve, the end material pipe can be used as it is for the sleeve main body.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) and (b) are cross-sectional views of a piping sleeve according to the present invention. Drawing, Drawing 2 (a) and (b) are sectional explanatory views of a sleeve for concrete penetration piping concerning other examples of the present invention.

FIG. 3 is an explanatory sectional view showing a state in which the piping sleeve of FIG. 1 is attached to a foundation reinforcing bar and a concrete formwork is set, FIG. 4 is an explanatory view of a use state of the piping sleeve of FIG. 1, and FIG. It is explanatory drawing of the use condition which utilized one piping sleeve for another place.

FIG. 6 is a basic sectional view showing a state in which a cap-shaped flexible plate is attached to the edge of the sleeve body, FIG. 7 is a sectional view of a first application example, and FIG. 8 is a second application example. 9 is a sectional view of the third applied embodiment, and FIG. 10 is a sectional view of FIG.
It is a design explanatory view of the flexible plate-shaped body shown in FIG.

FIG. 11 is an explanatory cross-sectional view showing a state in which a piping sleeve is arranged on a mold, FIG. 12 is an explanatory cross-sectional view of a foundation on which a sleeve is installed, and FIG. 13 is an explanatory cross-sectional view showing a state in which piping is inserted through a piping sleeve. FIG. 14 and FIG. 14 are cross-sectional explanatory views of a foundation in a state where one end edge of a sleeve main body is closed with an adhesive tape or the like.
5 (a), (b), (c), and (d) are enlarged cross-sectional explanatory views of main parts in a state where a pipe is inserted through a flexible plate.

In FIGS. 1A and 1B, reference numeral 1 denotes a piping sleeve according to the present invention, which comprises a sleeve main body 2 and a flexible plate 3. The sleeve body 2
Is made of a hard resin and has a certain hardness and strength. The flexible plate 3 is made of a similar soft resin and has flexibility.

In the case of this embodiment, the above-mentioned sleeve body 2
Has a dimension equal to the length of the piping sleeve 1 and equal to the thickness of the foundation concrete described later.
The flexible plate 3 is attached and fixed substantially at the center of the long axis in the sleeve body 2 in a direction orthogonal to the long axis and integrally with the center of the flexible plate 3. A pipe insertion hole 4 is formed.

The center of the flexible plate 3 is formed to be thinner than its outer periphery, and the pipe insertion hole 4 provided in the flexible plate 3 has a It has an inner diameter slightly smaller than the outer diameter of the pipe inserted into the pipe insertion hole 4. The flexible plate 3 does not necessarily need to be formed integrally with the sleeve body 2, but may be formed separately from the sleeve body 2 in a later step by means such as adhesion or insertion.
Can be attached to the inner peripheral surface of the.

At approximately the center of the outer peripheral surface of the sleeve main body 2, projections 5 are provided to project upward and downward, respectively. This projection 5
Has a fan shape so that the wire can be easily wound and fixed. The projection 5 can be provided with a hole for inserting a number line.

When the piping sleeve 1 according to the present invention is embedded in a concrete foundation, first, as shown in FIG.
Before setting the formwork 6 for the concrete foundation, the piping sleeve 1 is fixed to a predetermined position of the reinforcing bar 8 arranged in advance via the number line 7. Thereafter, the mold 6 is set on both sides of the piping sleeve 1 and both ends of the piping sleeve 1 are fixed.
Reference numeral 9 in the figure denotes the root of the concrete foundation.

Next, in FIG. 4, reference numeral 10 denotes a concrete foundation, which is set after the fresh concrete is poured into the above-mentioned formwork 6, cured, and the surrounding formwork 6 is removed to remove soil. This shows a backfilled state. This concrete foundation 1
The pipe sleeve 1 is buried in the lower part of the pipe 0.

The pipe insertion hole 4 is provided in the pipe insertion hole 4 of the flexible plate 3 provided in the sleeve body 2.
A pipe 11 having an outer diameter slightly larger than the inner diameter is inserted. Reference numeral 12 denotes a floor of a building placed on the concrete foundation 10.

As shown in the figure, since the pipe 11 is in close contact with the inner peripheral surface of the pipe insertion hole 4 of the flexible plate 3, no gap is formed between the pipe 11 and the building 11. Insects, small animals, odors and the like can be completely prevented from entering the concrete foundation 10 from the outside.

The pipe 11 is supported by the flexible plate 3 as shown in FIG.
Even when the building and the ground around the building are slightly displaced during an earthquake, the force of the pipe 11 to shear can be suppressed. Further, when the pipe 11 is loosely fitted and attached to the sleeve body 2 as described above, the pipe 11 can be piped while being inclined at a desired arbitrary angle as shown in the figure.

As shown in FIG. 2B, a plurality of cut grooves 13 are provided radially at the center of the flexible plate 3 of the sleeve body 2 used in a place where there is no odor problem. It is possible to Such a cut 13 is formed in the flexible plate 3
When the pipe 11 is provided at the peripheral edge of the pipe insertion hole 4, the pipe 11 having a large diameter can be smoothly inserted into the pipe insertion hole 4. It is particularly effective for piping having a large diameter.

The embodiment shown in FIG. 5 is an embodiment which is used when the piping sleeve 1 according to the present invention is buried in an outer wall 14 of a building and a cable 15 such as an electric wire is led into the outer wall 14. Is an example.

As shown in FIG. 5, when the pipe sleeve 1 is embedded in the outer wall 14 and used, as in the case of the concrete foundation 10 described above, the flexibility provided in the sleeve body 2 is used. The cable 15 is inserted into the pipe insertion hole 4 of the plate 3, and the outer peripheral surface of the cable 15 is connected to the pipe insertion hole 4.
Because it is in close contact with the peripheral edge of
There is no fear that wind or rainwater will enter indoors through.

In the embodiments shown in FIGS. 1 to 5, the sleeve body 2 having the same length as the piping sleeve 1 is inserted into the piping sleeve 1, and The embodiment in which the flexible plate 3 is attached to the inside has been described.
5, the flexible plate-shaped body (cap-shaped flexible plate-shaped body) 16 is connected to the edge 2 a forming the opening of the sleeve body 2.
Various embodiments will be described with respect to an embodiment configured to be mounted on a computer. In the case of this embodiment, the length of the sleeve main body 2 plus the flexible plate 3 is configured to be equal to the length of the piping sleeve 1.

In FIG. 6, the edge 2a of the sleeve body 2 is shown.
The following is a description of a basic mode in which the flexible plate-like body 16 is attached to the first embodiment. In the case of this embodiment, in order to attach the flexible plate 16 formed of an annular elastic body to the edge 2 a of the sleeve body 2, the flexible plate 16 is It is formed in an annular cap type so that it can be coated on the cap.

That is, the flexible plate 16 has a fitting portion 17 fitted on the outer peripheral surface of the sleeve main body 2 and an end edge 2a of the sleeve main body 2 bent at a right angle to the tip of the fitting portion 17.
And a ring-shaped contact portion 18 that is brought into contact with the contact portion. The inner peripheral edge of the ring-shaped contact portion 18 forms a pipe insertion hole, and the pipe 11 is configured to be inserted into the pipe insertion hole.

Therefore, since the above-mentioned flexible plate-like body 16 is formed in a cap shape, it can be used in a factory or the like in advance.
It can be manufactured with a separate member from the sleeve body 2. Then, at a construction site or the like, it can be assembled and used by fitting it to the edge 2a of the sleeve main body 2. When the cap-shaped flexible plate-like body 16 is used as in the present invention, the sleeve body can effectively utilize the end material.

The flexible plate 16 shown in FIG.
As shown in the example, the thickness of the central portion of the ring-shaped contact portion 18 is gradually reduced toward the center side, and the thin portion 18a is formed.
Can be formed to make this part flexible.

As shown in FIG. 8, the flexible plate 16
A protrusion or a ring-shaped stopper 19 is provided on the outer peripheral surface of the fitting portion 17.
When concrete is poured around the flexible plate 16, the retaining portion 19 is buried in the concrete, and the flexible plate 16 is opened in the opening of the sleeve body 2. It can be separated further and it can be prevented from falling off the foundation.

Further, an annular protruding rib 20 which can be in close contact with the formwork 6 of the concrete foundation 10 can be provided on the outer end face of the close contact portion 18 so as to protrude therefrom. In the embodiment of FIG. 8, a plurality of annular projecting ribs 20 are arranged concentrically. As described above, the annular protruding ribs 20 are provided and the annular protruding ribs 20 are brought into close contact with the formwork 6 so that when the concrete is poured into the formwork 6, the concrete becomes the piping sleeve 1 (the sleeve body 2). ) Can be prevented more reliably.

In FIG. 9, since the retaining portion 19 is provided on the outer periphery of the distal end edge of the fitting portion 17, the structure is simple and easy to manufacture. Further, a single annular protruding rib 20 having a sharp tip is attached to the outer end surface of the close contact portion 18. The single unit is simpler in structure and can sufficiently prevent the inflow.

FIG. 10 shows the flexible plate 1 shown in FIG.
6 is a design drawing, a longitudinal sectional view of the flexible plate-like body 16,
It is clarified in detail by a plan view, a side view, and a bottom view.
With this drawing, the configuration of the flexible plate 16 is more clearly described.

In the case where the piping sleeve 1 is formed using the above-mentioned flexible plate 16, as shown in FIG. 11, for example, the flexible plate The sleeve bodies 2 to which the flexible plate-shaped bodies 16 were attached were horizontally arranged between the two form frames 6 for the concrete foundation, and attached to both sides of the sleeve body 2. The flexible plate-like bodies 16 are respectively brought into close contact with the side surfaces of the formwork 6, and in this state, the formwork tightening bolts 21 are strongly tightened to fix the formwork 6, and concrete is poured into the formwork 6 in this state. Thus, a concrete foundation 10 can be constructed as shown in FIG.

Since the sleeve body 2 having the flexible plate members 16 attached to both ends is integrally embedded in the base 10 constructed as described above, a pipe is provided in the sleeve body 2. In this case, as shown in FIG. 13, the pipe 11 is inserted into a pipe insertion hole provided at the center of the contact portion 18 of the flexible plate 16 provided at both ends of the sleeve body 2. Can be easily piped.

As described above, when the pipe 11 is inserted into the pipe insertion hole provided at the center of the close contact portion 18 of the flexible plate 16 of the sleeve body 2, FIG. As shown in (d), the peripheral edge of the pipe insertion hole of the contact portion 18 is bent in a predetermined direction by the insertion of the pipe 11 so as to be in close contact with the outer peripheral surface of the pipe 11. Insects, small animals, odors, moisture and the like can be completely prevented from entering.

In the above-described embodiment, the description has been given of the embodiment in which the flexible plate 16 is fitted and attached to the openings at both ends of the sleeve main body 2. However, as shown in FIG. The plate-like body 16 may be configured to be fitted and attached to only one side opening of the sleeve body 2. In this case, as shown in the figure, the opening on one side where the flexible plate 16 is not attached can be closed with an adhesive tape 22 or the like, so that the inflow of concrete can be more completely prevented.

The close contact portion 18 of the flexible plate 16 of the present invention has a sufficient closing property, so that the object can be achieved by using a single unit. The use of a single unit is more economical, and the case where the tube 11 is inserted through the single flexible plate 16 can cause the tube 11 to be tilted at an arbitrary angle in the tube sleeve 1. It is possible.

[0049]

According to the present invention, since the length of the sleeve is made equal to the thickness of the concrete to be constructed, both ends of the sleeve are stably brought into close contact with the form when concrete is cast. It can be mounted and fixed in the state. For that reason, even when ready-mixed concrete is poured into the formwork,
This has the effect of preventing ready-mixed concrete from flowing into the sleeve.

Further, a flexible plate having a pipe insertion hole slightly smaller than the outer diameter of the pipe at the center thereof is disposed and mounted in the sleeve so as to be orthogonal to the axis. Since it is closely contacted with the inner peripheral edge of the hole, there is no fear that a gap is formed between the two. Accordingly, there is no need to perform the work of filling gaps as in the related art, and there is an effect that insects, small animals, odors and the like do not pass through the inside of the sleeve.

When the present invention is practiced, since the sleeve can be buried and used in the concrete foundation from the beginning, the discharge of industrial waste such as the conventional paper sleeve can be completely prevented. Further, since the sleeve body may be a cylindrical pipe, a cut-off waste pipe such as a PVC pipe can be used.

As described above, the pipe inserted into the pipe sleeve is supported by the inner peripheral edge of the pipe insertion hole of the flexible plate and is loosely fitted in the sleeve body. Even when some displacement occurs in the outer peripheral ground, it is possible to suppress the force of the pipe to shear. In addition, since the pipe is loosely fitted in the sleeve body, especially when there is only one plate-shaped body, the pipe has an effect that it can be freely piped by being inclined at a desired arbitrary angle. I have.

In the present invention, when the central portion of the flexible plate attached to the sleeve is formed to be thinner than the surrounding portion, the central portion has flexibility, so that the diameter is slightly larger. Pipe can be smoothly inserted into the pipe insertion hole provided at the center. Further, since the outer peripheral portion is formed to be thick, it has an effect that it can be firmly and stably fixed to the inner peripheral surface of the sleeve.

Further, in the present invention, when the sleeve body and the flexible plate are integrally formed, the sleeve body with the flexible plate is preliminarily inexpensive in a factory. It can be mass-produced. If the flexible plate is attached separately from the sleeve body, the flexible plate can be manufactured separately from the sleeve body and easily assembled and used at the construction site. Has the effect that can be. Further, in the case of the present invention, there is an effect that the flexible plate-shaped body can be attached to the inner periphery of the sleeve main body or the edge of the sleeve main body as required.

The flexible plate-like body for a sleeve according to the present invention has an annular fitting portion fitted on an outer peripheral surface of a sleeve main body and a damaged peripheral surface of a pipe inserted into the sleeve main body. Since the ring-shaped contact portion is integrally connected and formed in a cap shape, at a construction site or the like, this flexible plate for a sleeve is fitted to the edge of the sleeve. By doing so, there is an effect that it can be easily attached and used. Further, by using this flexible plate for a sleeve, the pipe fitted into the sleeve has a great effect such that the end pipe can be used as it is.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional explanatory views of a piping sleeve according to the present invention, respectively.

2 (a) and 2 (b) are cross-sectional explanatory views of another example of a sleeve for concrete penetration piping according to the present invention.

FIG. 3 is an explanatory cross-sectional view showing a state in which the piping sleeve of FIG. 1 is attached to a base reinforcing bar and a concrete formwork is set.

FIG. 4 is an explanatory view of a usage state of the piping sleeve of FIG. 1;

FIG. 5 is an explanatory view of a use state in which the piping sleeve of FIG. 1 is used in another place.

FIG. 6 is a basic sectional view showing a state in which a flexible plate is attached to an edge of a sleeve main body.

FIG. 7 is a cross-sectional view of the first application example.

FIG. 8 is a sectional view of a second application example.

FIG. 9 is a sectional view of a third applied embodiment.

FIG. 10 is an explanatory diagram of a design of the flexible plate-shaped body shown in FIG. 9;

FIG. 11 is an explanatory sectional view showing a state where a sleeve main body is arranged on a mold.

FIG. 12 is an explanatory sectional view of a foundation on which a sleeve is installed.

FIG. 13 is an explanatory cross-sectional view showing a state where a pipe is inserted into a pipe sleeve.

FIG. 14 is an explanatory sectional view of a foundation in a state where one end edge of a sleeve main body is closed with an adhesive tape or the like.

FIGS. 15 (a), (b), (c) and (d) are enlarged cross-sectional explanatory views of main parts in a state where a pipe is inserted through a flexible plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Piping sleeve 2 ... Sleeve main body 2a ... Edge 3 ... Flexible plate 4 ... Piping insertion hole 5 ... Protrusion 6 ... Form frame 7 ... Number line 8 ... Reinforcing bar 9 ... Root cut bottom 10 ... Concrete foundation 11 ... Piping 12 ... Floor 13 ... Cut groove 14 ... Outer wall 15 ... Cable 16 ... Flexible plate 17 ... Fitting part 18 ... Ring-shaped close contact part 19 ... Prevention part 20 ... Annular protruding rib 21 ... Formwork fastening bolt 22 …Adhesive tape

Claims (5)

[Claims] 1. A sleeve for penetrating a pipe such as a water supply / drain pipe in concrete such as a house foundation, the length of the sleeve being equal to the thickness of the concrete and being slightly smaller than the outer diameter of the pipe. A sleeve for concrete penetration piping, characterized in that a flexible plate-like body having a pipe insertion hole at the center is disposed at a predetermined position of the sleeve at right angles to an axis of the sleeve. 2. The flexible plate-like body has a central portion formed to be thinner than an outer peripheral portion thereof.
Sleeve for concrete penetration piping. 3. The concrete through pipe according to claim 1, wherein the flexible plate is disposed on an inner periphery of the sleeve or on an edge of the sleeve. Sleeve. 4. The sleeve for a concrete through pipe according to claim 1, wherein said flexible plate-like body is integrally or separately attached to said sleeve. 5. An annular fitting portion which is a flexible plate-shaped member disposed on an end edge of the sleeve or separately attached to the sleeve, the annular fitting portion being fitted to an outer peripheral surface of the sleeve main body. And a ring formed integrally from the outer end of the fitting portion, having an inner diameter smaller than the outer diameter of the pipe fitted into the sleeve body, and being in close contact with the outer peripheral surface of the pipe. A flexible plate-like body for a sleeve having a structure formed by a close contact portion having a shape.