JP6747667B2 - Gap closing structure and closing member - Google Patents

Description

TECHNICAL FIELD The present invention relates to a closing member that closes a clearance around a penetration portion of a penetration pipe that penetrates a structure such as a floor, a wall, and a ceiling of a building, and a clearance blocking structure including the closure member.

Generally, a through hole is formed in a floor material of a building, and a through pipe such as a drain pipe or a CD (Conduct Duct) pipe for accommodating an electric wire is passed through the through hole (see Patent Document 1, etc.). The inner diameter of the through hole is slightly larger than the outer diameter of the through tube. Therefore, an annular gap is formed between the inner peripheral surface of the through hole and the outer peripheral surface of the through tube. The gap is filled with a filler such as urethane resin or mortar. The filler protruding from the through hole to the upper surface side and the lower surface side of the floor material is cut off.

JP, 2010-281366, A ([0002]).

Filling the filler such as urethane resin and cutting off the protruding portion are complicated and time-consuming. Further, depending on the skill of the operator, there may be a case where the filling is defective, the heat insulation performance and the airtight performance vary, and the quality is not stable.
In view of the above circumstances, the present invention can easily close the gap around the penetration portion of the penetration pipe that penetrates a structure such as the floor of the building, and stabilizes the heat insulation performance and the airtight performance regardless of the skill of the operator. It is an object of the present invention to provide a gap closing structure and a closing member that can be secured in a specific manner.

In order to solve the above problems, the present invention is a closing member that closes a gap around the through portion of a through pipe that penetrates a building structure,
The first and third layers having a relatively high airtightness and the second layer having a relatively high heat insulating property are provided,
These first to third layers are laminated so that the second layer is sandwiched between the first layer and the third layer,
And a tube insertion hole for inserting the through tube is formed so as to penetrate in the stacking direction of the first to third layers,
The pipe insertion holes in the first layer and the third layer are smaller in diameter than the pipe insertion holes in the second layer.
The first layer and the third layer have higher airtightness (air permeation resistance or the like) than the second layer.
The second layer has a higher heat insulating property (heat resistance value or the like) than the first layer and the third layer.
Further, the present invention is a gap closing structure for closing the gap around the through portion of the through pipe penetrating the building structure,
Including the closure member,
The through-tube is inserted through the tube insertion hole of the closing member, and the first layer of the closing member is applied to a surface on one side of the structural body,
The inner diameters of the tube insertion holes in the first layer and the third layer of the closing member are smaller than the outer diameter of the through tube.

At the time of construction, the blocking member is fitted to the outer periphery of the through-tube by passing the through-tube through the tube insertion hole of the blocking member. In the natural state (the state where the through pipe is not inserted), the diameters of the pipe insertion holes of the first layer and the third layer are made smaller than the diameter of the penetration pipe, so that the peripheral portions of the pipe insertion holes in the first layer and the third layer are expanded. It can be made to have a diameter so as to be in close contact with the through pipe. As a result, the closing member can be firmly held by the through tube. Further, by applying the first layer of the closing member to the building structure, it is possible to easily close the gap around the through portion of the through pipe. Moreover, the airtightness can be secured by the first layer and the third layer, and the heat insulating property can be secured by the second layer. As a result, it is possible to prevent the airtight performance and the heat insulating performance from becoming unstable depending on the skill of the worker.

Further, it is preferable that the inner diameter of the tube insertion hole in the second layer is smaller than the outer diameter of the through tube.
As a result, the peripheral portion of the tube insertion hole in the second layer is brought into close contact with the through tube, so that the blocking member can be held in the through tube more stably.

It is preferable that a peripheral edge portion of the tube insertion hole in the first layer is wound along the through tube and enters the gap. This allows the gap to be at least partially filled.
It is preferable that the peripheral edge portion of the tube insertion hole in the third layer is wound along the through tube and is sandwiched between the inner peripheral surface of the tube insertion hole in the second layer and the through tube. As a result, the blocking member can be held in the through tube more stably.

According to the present invention, it is possible to easily close the gap around the penetration portion of the penetration pipe that penetrates the building structure. Moreover, it is possible to stably secure the heat insulating performance and the airtight performance regardless of the skill of the operator.

FIG. 1 shows an embodiment of the present invention and is a front sectional view of a structure for closing a gap in a floor of a building. FIG. 2 is an enlarged cross-sectional view of the circle II of FIG. FIG. 3 is a perspective view of a closing member of the gap closing structure. FIG. 4 is a plan view of the closing member. FIG. 5 is a sectional view taken along the line VV of FIG.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a gap closing structure 1 between a floor 10 (construction body) of a building and a through pipe 2. The gap closing structure 1 includes a floor 10, a through tube 2, and a closing member 20. The floor 10 includes a floor plywood 11. An underfloor heat insulating material 12 is provided on the lower surface of the floor plywood 11. Through holes 13 are formed in the floor 10. The through hole 13 penetrates the floor plywood 11 and the underfloor heat insulating material 12 in the thickness direction (vertical direction).

The through pipe 2 is vertically inserted into the through hole 13. The through pipe 2 is composed of, for example, a drain pipe made of vinyl chloride, a CD pipe made of resin, or the like. As shown by the chain double-dashed line in FIG. 4, the cross-sectional shape of the through tube 2 is usually circular.

As shown in FIG. 1, the inner diameter of the through hole 13 is slightly larger than the outer diameter of the through tube 2. Therefore, an annular gap 13a is formed around the through portion 2c (the portion passing through the through hole 13) of the through tube 2. The gap 13 a is defined between the outer peripheral surface of the through tube 2 and the inner peripheral surface of the through hole 13.

As shown in FIG. 1, a closing member 20 is provided below the through hole 13 in the floor 10. The closing member 20 closes the gap 13a around the through portion 2c of the through tube 2 from below. As shown in FIGS. 3 and 4, the closing member 20 is formed in a rectangular thick plate shape. A circular tube insertion hole 20c is formed through the central portion of the closing member 20.
The outer shape of the closing member 20 is not limited to a quadrangle, and may be a circle or a polygon other than a quadrangle. The shape of the tube insertion hole 20c is preferably similar to the cross-sectional shape of the through tube 2.

As shown in FIGS. 3 and 5, the closing member 20 includes a first layer 21, a second layer 22, and a third layer 23. The three layers 21, 22, 23 are laminated in the thickness direction (up and down) such that the second layer 22 is sandwiched between the first layer 21 and the third layer 23.
In addition, in FIG. 5, the thickness of the first to third layers 21, 22, and 23 is exaggerated with respect to the width dimension.

The first layer 21 and the third layer 23 are made of polyethylene (PE), for example, and have a sheet shape having elasticity. The first layer 21 and the third layer 23 have a sufficiently smaller air permeability than the second layer 22 and are excellent in airtightness. More preferably, the first layer 21 and the third layer 23 also have a heat insulating property. The thickness of the first layer 21 and the third layer 23 is, for example, about several mm, but the present invention is not limited to this. The material of the first layer 21 and the third layer 23 is not limited to polyethylene as long as it can ensure airtightness, and preferably also has elasticity and heat insulation, and other resin such as polypropylene (PP). May be. The first layer 21 and the third layer 23 may be made of foamed resin having finer bubbles than the second layer 22.

The second layer 22 is made of, for example, closed-cell expanded polyethylene, and has a thick sponge shape (porous body). The second layer 22 has a sufficiently high thermal resistance value as compared with the first and third layers 21 and 23 and is excellent in heat insulation. The thickness of the second layer 22 is larger than the thickness of the first layer 21 and the third layer 23 and is, for example, about several tens of mm, but the present invention is not limited to this. The material of the second layer 22 is not limited to foamed polyethylene as long as it can ensure heat insulation and preferably has elasticity, and may be another foamed resin such as urethane foam or styrene foam, and may be a closed cell. It is not limited and may be open cells, or may be glass wool or the like.

As shown in FIG. 5, the first layer 21 and the third layer 23 are superposed on the upper and lower surfaces of the second layer 22, respectively. The second layer 22, the first layer 21, and the third layer 23 may be joined by heat fusion, or may be joined via an adhesive.

As shown in FIGS. 3 and 4, pipe insertion hole portions 21c, 22c, and 23c are formed in the central portions of the first to third layers 21, 22, and 23, respectively. The tube insertion holes 20c are formed by the tube insertion holes 21c, 22c, and 23c. As shown in FIG. 5, the tube insertion hole 20c penetrates the three layers 21, 22, 23 vertically (in the stacking direction).

In a natural state in which the through pipe 2 is not inserted into the pipe insertion hole 20c, the pipe insertion hole 20c (the pipe insertion hole portion 21c) in the first layer 21 and the pipe insertion hole 20c (the pipe insertion hole portion 23c) in the third layer 23 ) Are smaller in diameter than the tube insertion hole 20c (tube insertion hole portion 22c) in the second layer 22, respectively. The peripheral edge portion 21b of the tube insertion hole portion 21c in the first layer 21 and the peripheral edge portion 23b of the tube insertion hole portion 23c in the third layer 23 are more radial than the inner peripheral surface of the tube insertion hole portion 22c of the second layer 22. It is projected inward.
In addition, the inner diameters of the tube insertion hole portions 21c and 23c in the natural state are smaller than the outer diameter of the through tube 2.
Further, the inner diameter of the tube insertion hole portion 22c in the natural state is also smaller than the outer diameter of the through tube 2.
The pipe insertion hole portion 21c and the pipe insertion hole portion 23c in the natural state have the same diameter as each other, but the invention is not limited to this, and the pipe insertion hole portion 21c may be larger than the pipe insertion hole portion 23c. Conversely, it may be small.

As shown in FIG. 1, the through tube 2 is inserted through the tube insertion hole 20c, and the closing member 20 is fitted on the outer periphery of the through tube 2. The tube insertion hole 20c is expanded in diameter by being inserted into the through tube 2. Further, the first layer 21 is applied to the underfloor heat insulating material 12, and further to the lower surface (one surface) of the floor plywood 11 via the underfloor heat insulating material 12.
As shown in FIG. 2, the hole peripheral edge portion 21b of the first layer 21 is elastically deformed so as to be rolled upward along the penetration tube 2 and enters the gap 13a, and at the same time, the outer peripheral surface of the penetration tube 2 is entirely covered. It is strongly pressed against the circumference and is in close contact.
The hole peripheral edge portion 22b of the second layer 22 is compressed and pressed against the entire circumference of the through tube 2 to be in close contact therewith.
The hole peripheral edge portion 23b of the third layer 23 is elastically deformed so as to be rolled up along the through tube 2, so that the inner peripheral surface of the tube insertion hole portion 22c of the second layer 22 and the through tube 2 are separated from each other. While being sandwiched between them, they are strongly pressed and closely attached to the entire outer peripheral surface of the through tube 2.

When constructing the gap closing structure 1, the closing member 20 is fitted into the through pipe 2 from the upper end portion of the through pipe 2 after the through pipe 2 is vertically piped or before being piped. That is, the upper end portion of the through tube 2 is inserted into the tube insertion hole 20c of the closing member 20. As a result, the diameter of the tube insertion hole 20c is increased according to the diameter of the through tube 2. Further, the closing member 20 is slid to a predetermined position along the tube axis of the through tube 2. By this sliding operation, the hole peripheral portions 21b and 23b of the first layer 21 and the third layer 23 are elastically deformed so as to be respectively turned up by friction with the through tube 2. In addition, the hole peripheral edge portion 23b of the third layer 23 enters between the hole peripheral edge portion 22b of the second layer 22 and the through tube 2. Further, the hole peripheral portions 21b, 22b, 23b are elastically strongly pressed against the outer peripheral surface of the through tube 2. As a result, a large frictional resistance is generated between the closing member 20 and the through tube 2, and the closing member 20 can be held on the outer periphery of the through tube 2 in a self-supporting manner. The closing member 20 does not fall naturally due to its own weight. In particular, the hole peripheral edge portion 23b of the third layer 23 is inserted into the tube insertion hole portion 22c, whereby the second layer 22 is further compressed and strongly adhered to the through tube 2. Thereby, the holding force of the blocking member 20 to the through tube 2 can be further increased.

Next, as shown in FIG. 1, the floor 10 is installed, and the through pipe 2 is passed through the through hole 13. In addition, the first layer 21 of the closing member 20 is pressed against the underfloor heat insulating material 12. As a result, the gap 13a around the through tube 2 is closed from below by the closing member 20. It is not necessary to fill a filler such as urethane resin or to cut off the protruding portion of the filled filler, and the gap 13a can be easily closed in a short time.
Moreover, since the closing member 20 is held by the penetrating pipe 2 in a self-supporting manner, it is not necessary to fix the closing member 20 to the penetrating pipe 2 or the floor 10 with an adhesive tape or the like.
Further, as shown in FIG. 2, the hole peripheral edge portion 21b of the first layer 21 enters the gap 13a, whereby the gap 13a can be at least partially filled.

According to the gap closing structure 1, the airtightness around the penetrating portion 2c of the penetrating tube 2 can be ensured mainly by the first layer 21 and the third layer 23 of the closing member 20. In particular, since the hole peripheral portions 21b and 23b on the upper surface side and the lower surface side of the closing member 20 are in close contact with the entire circumference of the through tube 2, respectively, sufficient airtightness between the through tube 2 and the closing member 20 can be ensured. .. Further, by pressing the first layer 21 against the underfloor heat insulating material 12, airtightness between the closing member 20 and the underfloor heat insulating material 12 can be secured. In addition, the heat insulation around the penetrating portion 2c of the penetrating tube 2 can be ensured mainly by the second layer 22 of the closing member 20. The heat insulation can be secured. The airtightness and heat insulation performance will not be unstable due to the skill of the operator.

The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the spirit of the invention.
For example, the blocking member 20 may be attached to the through pipe 2 or the underfloor heat insulating material 12 with an adhesive tape or the like.
The closing member 20 may be fitted from below the through tube 2. The hole peripheral edge portion 21b of the first layer 21 may be sandwiched between the inner peripheral surface of the tube insertion hole portion 22c of the second layer 22 and the through tube 2. Either one of the first and third layers 21 and 23 may be omitted.
The inner diameter of the tube insertion hole portion 22c of the second layer 22 may be equal to or larger than the outer diameter of the through tube 2.
The structure of the building is not limited to the floor 10, but may be a wall, a pillar, a ceiling, or the like. INDUSTRIAL APPLICABILITY The present invention can be applied as a closing means around the penetration portion 2c of various penetration pipes 2 that penetrate various building structures.

The present invention can be applied to, for example, a floor structure of a building.

1 Gap Closure Structure 2 Penetration Pipe 2c Penetration Part 10 Floor (Constituent)
11 Floor Plywood 12 Underfloor Insulation 13 Through Hole 13a Gap 20 Closing Member 20c Pipe Insertion Hole 21 First Layer 21c Pipe Insertion Hole Part (Pipe Insertion Hole in First Layer)
21b Hole peripheral portion 22 Second layer 22c Tube insertion hole portion (tube insertion hole in the second layer)
22b Hole peripheral portion 23 Third layer 23c Pipe insertion hole portion (pipe insertion hole in the third layer)
23b Hole peripheral part

Claims (4)

A closing member that closes a gap around the through portion of a through pipe that penetrates a building structure,
The first and third layers having a relatively high airtightness and the second layer having a relatively high heat insulating property are provided,
These first to third layers are laminated so that the second layer is sandwiched between the first layer and the third layer,
And a tube insertion hole for inserting the through tube is formed so as to penetrate in the stacking direction of the first to third layers,
A closing member characterized in that the pipe insertion holes in the first layer and the third layer have a smaller diameter than the pipe insertion holes in the second layer. A gap closing structure for closing a gap around the through portion of a through pipe that penetrates a building structure,
Including the closure member according to claim 1,
The through-tube is inserted through the tube insertion hole of the closing member, and the first layer of the closing member is applied to a surface on one side of the structural body,
The gap closing structure, wherein the inner diameters of the tube insertion holes in the first layer and the third layer of the closing member are smaller than the outer diameter of the through tube. Furthermore, the inner diameter of the pipe insertion hole in the second layer is smaller than the outer diameter of the through pipe, and the gap closing structure according to claim 2. The peripheral portion of the pipe insertion hole in the first layer is rolled along the through pipe to enter the gap,
The peripheral portion of the tube insertion hole in the third layer is wound along the through tube and is sandwiched between the inner peripheral surface of the tube insertion hole in the second layer and the through tube. The structure for closing a gap according to Item 2 or 3.

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