JP2001116171A - Piping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping structure capable of preventing a gas supply pipe passed therethrough from being damaged by operations after piping, and enabling the pipe to be recovered to prevent a rise in costs of construction work. SOLUTION: This structure is adapted to lay a pipe within a passing part formed within an exterior wall part 1 for a multiple dwelling house. The structure has a metallic, circumferentially split cylinder member 4 having an outside diameter such that it can be inserted into a through hole 2 bored as the passing part. The longitudinal length of the split cylinder member 4 parallel to the direction of insertion into the through hole 2 is longer than the length of the through hole 2, and a flange portion 4B with a diameter greater than the inside diameter of the through hole 2 is provided longitudinally at the rear end of the split cylinder member 4 along the direction of insertion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure, and more particularly, to a piping structure for protecting a gas pipe such as a flexible pipe inserted into an outer wall of an apartment house from other works.

[0002]

2. Description of the Related Art At the time of building a multi-family house or the like, a pipe for supplying gas indoors is provided for each house. The gas supply pipe, for example, will be described with reference to the structure shown in FIG.
And the end of the supply pipe B is connected to the flexible pipe C to reach from the veranda A to the outer wall D. Flexible tube C
Is inserted into an insertion hole D1 formed at a required position of the outer wall D, and its terminal portion is cut to have a required length indoors, and is collected and accommodated in the insertion hole D1. The insertion hole D1 is formed by a sheath tube or the like made of cardboard or the like which is positioned and arranged before the concrete is poured. After the concrete is cured, the flexible tube is closed by a sealing material and accommodated therein. Are kept intact. In addition, in FIG. 4, the code | symbol E has shown the partition wall for pipe spaces provided between the outer wall D surfaces.

[0003]

By the way, when the concrete placement is completed and the concrete curing period has passed,
Finishing processing of the outer wall is performed to attach tiles and the like. A high-speed rotatable tool such as a sander capable of grinding the surface is used for this work. Therefore, if the grinding tube is accidentally deviated from the grinding position during the operation, the grinding blade reaches the position of the flexible tube C protruding from the outer wall surface, and a hole is formed in a part of the flexible tube or the flexible tube is broken. Sometimes.

On the other hand, works requiring piping work indoors and outdoors include not only gas works but also water supply, hot water supply or power distribution works. For this reason, when the piping position used for other construction is intersected with the flexible pipe that has finished piping, the flexible pipe may be bent to perform piping work in other construction. At this time, if the sheath tube is bent a plurality of times at the end, a crack may be generated at the edge of the end.

An object of the present invention is to provide a piping structure having a structure capable of preventing a damaged flexible pipe from being damaged by other construction work in view of the above problems in the conventional piping structure. .

[0006]

In order to achieve this object, an invention according to claim 1 is a structure for laying a pipe in an insertion portion formed in an outer wall portion for an apartment house,
A metal split cylindrical member having an outer diameter that can be inserted into an insertion hole formed as the insertion portion and divided in a circumferential direction is provided, and the split cylindrical member is inserted into the insertion hole. In this case, the length is at least equivalent to a length including a grinding allowance protruding from the outer wall surface.

The invention according to claim 2 is characterized in that a plurality of engaging portions which can be relatively fitted are provided on the division surface of the split tubular member along the longitudinal direction.

The invention according to claim 3 is characterized in that the outer peripheral surface of the split tubular member is formed by a tapered surface which increases in diameter from the front side to the rear side in the insertion direction.

According to a fourth aspect of the present invention, the tubular portion is formed as a trumpet-shaped curved surface whose diameter increases from the outer peripheral surface of the split tubular member.

[0010]

According to the first aspect of the present invention, when the split cylindrical member is inserted into the insertion hole, the end portion of the split cylindrical member projects from the outer wall surface by the grinding allowance. Even if you apologize and get mad at the time, the grinding tool touches the grinding allowance, so only the grinding allowance is ground,
The pipe accommodated in the split cylinder can be prevented from being damaged. Moreover, since the split tubular member can be separated even after the pipe has been inserted, when it is pulled out of the insertion hole, it can be collected without interfering with the pipe and can be reused.

According to the second aspect of the present invention, since the engaging portion which can be relatively fitted along the longitudinal direction is provided, the relative displacement in the case of the split shape is prevented. Pipe can be protected.

According to the third aspect of the present invention, since the outer peripheral surface of the split cylindrical member is a tapered surface, the inner surface state of the insertion hole is improved.
In other words, it can be inserted irrespective of a change in inner diameter, etc., and a press-fit state can be obtained, so that it can be firmly held in the insertion hole and exert the protection function of the pipe, and it can be easily held in the insertion hole. Can be.

According to the fourth aspect of the present invention, since the flange portion is a trumpet-shaped curved portion, the pipe inserted into the split tubular member does not bend even when bent.
It is possible to prevent the occurrence of a stress concentration portion as in the case of bending.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a schematic diagram for explaining a piping structure according to an embodiment of the present invention. In FIG. 1, reference numeral 1 indicates an outer wall of an apartment house or the like. An insertion hole 2 is formed in the outer wall 1 at a position where the gas supply pipe is drawn.
The insertion hole 2 is formed by positioning the outer cylinder 3 corresponding to the sheath tube described in the prior art at the time of placing concrete, and removing the outer cylinder 3 after curing after casting the concrete, or forming the outer cylinder 3 as it is. Is done. The present embodiment is directed to a case where the outer cylinder 3 is left.

A split cylinder member 4 is inserted into the outer cylinder 3 loaded in the insertion hole 2. As shown in FIG. 2, the split cylindrical member 4 is obtained by dividing a metal pipe into two in the circumferential direction, and has a length in the longitudinal direction parallel to the insertion direction indicated by an arrow in FIG. The length is configured to include the margin S.

The split tubular member 4 is formed with a shape that can be relatively fitted to the divided surface, that is, a plurality of locking portions 4A formed by combining concave portions and convex portions along the longitudinal direction. When the divided surfaces are matched, the engaging portions are fitted to each other so that the insertion hole 2
It has a cylindrical pipe shape that can be inserted into a pipe. When the engaging portions 4A are fitted to each other, it is possible to prevent the position of the split tubular member 4 from being displaced in the longitudinal direction, so that the engaging portions 4A are prevented from accidentally coming out after being inserted into the insertion hole 2. .

A flange 4 having a diameter larger than the inner diameter of the insertion hole 2 is provided on an end face of the split cylindrical member 4 on the rear side in the insertion direction in the longitudinal direction.
B is provided. The flange portion 4B has a trumpet-shaped curved portion 4B1 that is continuous with the outer peripheral surface of the split tubular member 4. After being inserted into the insertion hole 2, the gas supply pipe located on the insertion side is bent. At this time, the shape of the gas supply pipe is curved according to the curved portion 4B.

On the other hand, as shown in FIG. 1, the outer peripheral surface of the split cylindrical member 4 continuous with the curved portion 4B1 of the flange portion 4B is increased in diameter from the front side to the rear side in the insertion direction (arrow direction in the drawing). It is constituted by a tapered surface.

Since the present embodiment has the above configuration,
As shown in FIG. 3, the split cylinder member 4 is inserted into the outer cylinder 3 in the insertion hole 2 formed in the outer wall 1 after curing, with the divided surfaces aligned. The flexible pipe F, which is a gas supply pipe, is cut to have a required length after insertion, and is collectively accommodated in the split tubular member 4. The assembled flexible pipe F is
It is housed by being positioned on the side of the flange 4B in the split tubular member 4 so as not to be separated by a tape or the like. This is the collar 4B
This is because the end on the opposite side is the position where it touches the grinding sander. The split cylindrical member 4 inserted into the outer cylinder 3
When B comes into contact with the outer wall surface on the rear side in the insertion direction, since there is a length including a grinding allowance indicated by reference symbol S in FIG. 1, a blade of a grinding sander (not shown) comes in contact with the interior and exterior finishing processes. In this case, the accommodated flexible pipe can be protected.

The split cylindrical member 4 inserted into the outer cylinder 3 can be press-fitted even when the inner diameter of the cylindrical member is slightly different because the outer peripheral surface is tapered at the time of insertion. In addition, since the locking portions 4A formed on the divided surfaces are fitted to each other, there is no displacement in the longitudinal direction, and the flexible tube accommodated therein can be protected while maintaining the cylindrical shape. .

On the other hand, the split tube member 4 inserted in the outer tube 3 can be taken out after the flexible tube is inserted therein. That is, the split tube member 4 can be pulled out from the outer tube 3 in a state where the interior and exterior finishing processes are completed, for example, in a state where the flexible tube is inserted inside. In addition, since the dividing surface can be separated after being pulled out, even if the flexible tube is inserted, it can be divided without interference and it can be reused in another place. Become.

Further, since the split tube member 4 inserted into the outer tube 3 has the trumpet-shaped curved portion 4B1 on the flange portion 4B, the flexible tube inserted therein is lifted. When the flexible tube is bent, the flexible tube bends following the curved portion 4B1 and the bent portion is not formed. Therefore, stress concentration or the like does not occur at the bent portion, and the flexible tube has defects such as cracks and breakage. Does not occur. As a result, even if the flexible pipe is carelessly bent during construction other than the plumbing work, the flexible pipe is not damaged. Although the above embodiment has been described on the assumption that the outer cylinder 3 is loaded in the insertion hole 2, the insertion hole 2
Of course, it is possible to implement the method for itself.

[0023]

According to the first aspect of the present invention, when the split tubular member is inserted to a position where the flange is brought into contact with the outer wall surface,
Since the end opposite to the flange is longer by the grinding allowance, even if the grinding tool touches the split cylindrical member, only the grinding allowance is ground. The contained pipe can be protected from damage. Moreover, since the split tubular member can be separated even after the pipe has been inserted, when it is pulled out of the insertion hole, it can be collected without interfering with the pipe and can be reused. As a result, it is possible to reduce costs related to piping work.

According to the second aspect of the present invention, since the engaging portion which can be relatively fitted along the longitudinal direction is provided, the relative displacement in the case of the split shape is prevented. To protect the pipe. This prevents the protection member from being inadvertently detached from the gas supply pipe, so that the gas supply pipe can be reliably protected.

According to the third aspect of the present invention, since the outer peripheral surface of the split cylindrical member is a tapered surface, it can be inserted regardless of the inner surface state of the through hole, that is, regardless of a change in inner diameter, and can be press-fitted. Since the state is obtained, it can be held firmly in the insertion hole and can exert the protection function of the pipe,
It can be easily held in the insertion hole. Thus, the careless removal of the gas supply pipe from the insertion hole can be prevented, so that the stored gas supply pipe can be reliably protected.

According to the fourth aspect of the present invention, since the flange portion is formed as a trumpet-shaped curved portion, even if the pipe inserted into the split tubular member is bent, it is not bent. It is possible to prevent the occurrence of a stress concentration portion as in the case of the above. Accordingly, even if the gas supply pipe is bent inadvertently in other works, it is possible to reliably prevent the occurrence of troubles such as breakage and cracks.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining a piping structure according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a split tubular member used in the piping structure shown in FIG.

FIG. 3 is a perspective view showing a configuration of a split tubular member used in the piping structure shown in FIG.

FIG. 4 is a schematic diagram for explaining a conventional example of a piping structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer wall 2 Insertion hole 3 Outer cylinder 4 Split cylinder member 4A Locking part 4B Flange part 4B1 Curved part

Claims (4)

[Claims] 1. A structure for laying a pipe in an insertion portion formed in an outer wall portion for a multiple dwelling house, the outer diameter having a diameter that can be inserted into an insertion hole drilled as the insertion portion. A metal split cylinder member divided in the direction, wherein the split cylinder member is equivalent to a length including at least a grinding allowance protruding from the outer wall surface when inserted into the insertion hole. A piping structure characterized by: 2. A piping structure according to claim 1, wherein a plurality of engaging portions which can be relatively fitted are provided on the dividing surface of said split tubular member along said longitudinal direction. . 3. The piping structure according to claim 1, wherein the outer peripheral surface of the split tubular member is formed of a tapered surface that increases in diameter from a front side to a rear side in the insertion direction. 4. The piping structure according to claim 1, wherein said tubular portion has a trumpet-shaped curved surface whose diameter increases from an outer peripheral surface of said split tubular member.