JP6482210B2 - Construction structure and construction method of sleeve penetration part of building and cap material - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a construction structure and construction method of a sleeve penetration part of a building, and a cap material used for the construction. The present invention relates to a construction structure and construction method suitable for preventing foreign matter from entering the sleeve, and a cap material.

  For example, a through-hole for ventilation or the like is usually provided on the outer wall of a wooden building such as a residence (see Patent Documents 1 and 2). The sleeve at the end portion on the outdoor side of the ventilation duct is fitted into the through hole.

JP 2011-64378 A JP 2004-309095 A

  During the construction of the building, there is a period in which the opening of the sleeve installed on the outer wall or the like is exposed to the outside. During this exposure period, foreign matter such as rainwater and dust may enter the sleeve, and leaving it unattended will affect ventilation performance and the like. Therefore, in general, the opening of the end portion of the sleeve is blocked with a curing tape (easy peelable adhesive tape) to prevent foreign matter from entering. However, since the width of the curing tape is usually smaller than the diameter of the sleeve, multiple curing tape pieces are required, and both ends of each curing tape piece must be firmly attached to the edge of the sleeve opening, Complex and time consuming. In the end, it is necessary to peel off these pieces of curing tape from the sleeve. However, although the curing tape has a certain degree of adhesiveness even though it is easy to peel off, it is somewhat difficult to peel off. It takes time and effort. Furthermore, once used, the tape piece must be discarded and cannot be reused many times.

In order to solve the above problems, the sleeve penetration structure construction structure according to the present invention is:
A sleeve provided in the through hole of the structure with the through hole of the building;
A cap material detachably provided at the opening of the end of the sleeve;
Comprising the cap material,
A flexible cover that covers the opening;
An annular and expandable / contractible edge string provided on the peripheral edge of the cover part, and the edge string is elastically locked to the entire circumference of the end part of the sleeve.
As a result, the opening at the end of the sleeve can be easily closed with the cap material, and foreign matter can be prevented from entering the sleeve. Further, when it becomes unnecessary to close the opening, the cap material can be easily pulled out from the sleeve by, for example, picking and pulling the cover portion. Thereby, the construction of the sleeve penetrating portion can be performed efficiently, and the construction period can be shortened. Furthermore, the removed cap material can be reused, and the material cost can be reduced.
It is preferable that a circumferential length of the edge string in a natural state (a state where no tensile force is applied) is shorter than a circumferential length of the end portion of the sleeve. As a result, the edge string can be extended and reliably elastically locked to the end of the sleeve.
The foreign matter includes rainwater, snow, dust, small animals, and the like, as well as a covering material and a scattering body of paint.

The sleeve includes an outer cylinder, an inner cylinder provided in the outer cylinder, and an annular heat insulating layer provided between the outer cylinder and the inner cylinder, and the outer cylinder It is preferable that an annular water return flange protruding outward in the radial direction is formed at an end portion on the outdoor side of the cylindrical body.
The cover portion of the cap material covers the outdoor-side opening of the inner cylinder and covers the end surface of the heat-insulating layer on the outdoor side, and the outer peripheral portion of the cover portion covers the water return flange from the outdoor side to the indoor side. It is preferable that the edge string is elastically locked to the indoor side surface of the water return flange or the indoor side outer peripheral surface of the water return flange in the sleeve.
Accordingly, the cap member can be more stably disposed at the end portion of the sleeve because the water return flange becomes a locking member of the edge string. Moreover, the cover part covers the opening of the inner cylinder and the end face of the heat insulation layer, so that not only foreign matter can be prevented from entering the internal space of the sleeve, but also rainwater can penetrate into the heat insulation layer and dust can adhere to it. Can be prevented. Furthermore, the dew condensation water generated inside the structure with through-holes is guided to the outer periphery of the sleeve through the back surface of the water return flange (the surface facing the indoor side), so that the dew condensation water penetrates into the heat insulation layer. It is possible to prevent entry into the internal space of the sleeve.

The cap material according to the present invention is a cap material that is detachably provided at an opening of an end portion of a sleeve provided in the through hole when a structure with a through hole of a building is constructed,
A flexible cover that covers the opening;
An annular and expandable / contractible edge string provided on the peripheral edge of the cover part, and the edge string is elastically locked to the entire circumference of the end part of the sleeve.
With this cap material, the opening at the end of the sleeve can be easily closed, and foreign matter can be prevented from entering the sleeve. Further, when it is no longer necessary to close the opening, the cap member can be easily pulled out of the sleeve by grasping and pulling the cover portion.

The sleeve penetration part construction method according to the present invention is:
While providing a sleeve in the through hole of the structure with a through hole of the building,
Preparing a cap material having a flexible cover part and an annular and stretchable edge string provided on the periphery of the cover part;
Covering the opening at the end of the sleeve with the cover,
Elastically locking the edge string to the entire circumference of the end of the sleeve;
The cap material is removed after a required period.
As a result, the opening at the end of the sleeve can be easily closed with the cap material, and foreign matter can be prevented from entering the sleeve. In addition, the cap material can be easily removed after the required period ends. Here, the required period refers to a period in which foreign matter intrusion must be prevented until blocking of the opening of the sleeve becomes unnecessary, or a period in which foreign matter intrusion is likely to occur. Specifically, for example, an exterior material such as siding The period until the installation of the vent cap on the sleeve and the insertion or connection of the ventilation duct to the sleeve, the period until the application of the coating material and the paint is completed, and the like.

  According to the present invention, the opening at the end of the sleeve can be easily closed with the cap material, and foreign matter such as rainwater, dust, and a scattering material of the covering material can be prevented from entering the sleeve. Moreover, when it becomes unnecessary to close the opening, the cap material can be easily removed. Thereby, the construction of the sleeve penetrating portion can be performed efficiently, and the construction period can be shortened. Furthermore, the removed cap material can be reused, and the material cost can be reduced.

FIG. 1 shows the construction of a sleeve penetration part of a building according to the first embodiment of the present invention. Specifically, the sleeve penetration part of the outer wall of a wooden house under construction and its periphery are not covered with exterior materials and interior materials. It is side surface sectional drawing shown in the state of construction. FIG. 2 is an exploded perspective view of a sleeve and a cap material provided in the penetrating portion. FIG. 3A is a side sectional view showing the sleeve penetration portion of the outer wall under construction in a state where an exterior material, an interior material, and the like are installed. FIG.3 (b) is side surface sectional drawing which shows the sleeve penetration part of the said outer wall after completion of construction. FIG. 4 shows a structure for constructing a sleeve penetration part of a building according to a second embodiment of the present invention. Specifically, the steel beam of a steel structure under construction, a sleeve penetrating the steel beam, and both ends of the sleeve are provided. It is a disassembled perspective view of a cap material. FIG. 5 is a cross-sectional view showing the sleeve penetration portion of the steel beam and its surroundings during construction of the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of the present invention. 1st Embodiment concerns on the sleeve penetration part construction structure 1 and the construction method for the ventilation duct 2 in the outer wall 10 (structure with a through-hole) of the wooden house A (building). In addition, FIG.1 and FIG.3 (a) shows the outer wall 10 under construction. A two-dot chain line in FIG. 1 indicates an outer wall component that is not installed. FIG.3 (b) shows the outer wall 10 after construction completion. The following structure of the outer wall 10 and the ventilation duct 2 will be described in a state after completion of construction unless otherwise specified.

  As shown in FIGS. 1 and 3B, the outer wall 10 includes a wall plate material 11, an exterior material 12, and an interior material 13. The wall board material 11 is comprised, for example with the structural plywood, and is arrange | positioned perpendicularly. An exterior material 12 such as a siding is provided on the outdoor side (right side in both drawings) of the wall plate material 11 via a trunk edge 14. A ventilation layer 15 is formed between the wall plate material 11 and the exterior material 12. An interior material 13 such as a gypsum board is provided on the indoor side (left side in both drawings) of the wall plate material 11 via a shaft assembly 16. The shaft set 16 includes a column 16v (including an inter-column and a tube column), a horizontal member 16h, and the like. A heat insulating material 17 is provided in a space surrounded by the columns 16v and the horizontal member 16h.

  A through hole 19 is formed in the outer wall 10. The through hole 19 penetrates the outer wall 10 from the indoor side to the outdoor side in the thickness direction (left and right in FIG. 3B). The hole portion 19 b of the exterior material 12 in the through hole 19 has a smaller diameter than the hole portion 19 a of the wall plate material 11 and the hole portion 19 c of the interior material 13.

  A ventilation duct 2 is piped in the wooden house A. The ventilation duct 2 includes a duct body 2 a and a sleeve 20. The sleeve 20 is connected to the end of the duct main body 2a via a connecting cylinder 28. The sleeve 20 is fitted in the through hole 19.

  As shown in FIGS. 1 and 2, the sleeve 20 includes an outer cylindrical body 21, an inner cylindrical body 22, and a heat insulating layer 23. The outer cylinder 21 is made of a metal such as galvanized steel, stainless steel, high corrosion-resistant hot-dip galvanized steel, or aluminum, and has a cylindrical shape. The outer peripheral surface of the outer cylinder 21 is in contact with or faces the inner peripheral surface of the through hole 19. An annular inner rib 21 c is formed at an intermediate portion in the axial direction of the outer cylindrical body 21. The inner rib 21 c is recessed radially inward from the outer peripheral surface of the outer cylindrical body 21 and protrudes radially inward from the inner peripheral surface of the outer cylindrical body 21.

  As shown in FIGS. 1 and 2, a flange member 24 is provided on the outer periphery on the outdoor side from the inner rib 21 c in the intermediate portion of the outer cylindrical body 21. The flange member 24 includes a fitting cylinder portion 24b and a mounting flange 24f, and has a rectangular plate shape. A fitting hole 24 c is formed in the center of the flange member 24. At the periphery of the fitting hole 24c, a fitting tube portion 24b is provided so as to protrude to the outdoor side (right side in FIG. 1). The fitting cylinder portion 24 b has a circular short cylinder shape that matches the size of the outer cylinder body 21. The fitting cylinder portion 24 b is fitted to the outer periphery of the outer cylinder body 21 and is integrated with the outer cylinder body 21.

  A flat plate portion excluding the fitting cylinder portion 24b in the flange member 24 constitutes a mounting flange 24f. The mounting flange 24f protrudes radially outward from the entire circumference of the outer cylindrical body 21. The outer peripheral shape of the mounting flange 24f is a square, but is not limited to this, and may be a circle. This mounting flange 24f is assigned to the surface of the wall plate 11 on the outdoor side. Furthermore, the four corners of the mounting flange 24 f are connected to the wall plate 11 by screws 25. As a result, the sleeve 20 is fixed to the outer wall 10.

  Furthermore, a water return flange 21f is integrally formed at the end of the outer cylinder 21 on the outdoor side. The water return flange 21 f protrudes radially outward from the outer cylinder 21 and has an annular shape over the entire circumference of the outer cylinder 21. The protruding height of the water return flange 21f from the outer cylinder 21 is, for example, about 1 mm to 50 mm, preferably about 3 mm to 20 mm, and more preferably about 7 mm. The water return flange 21f is arranged away from the outdoor side (right in FIG. 1) of the mounting flange 24f. And the edge of the fitting cylinder part 24b on the outdoor side is in contact with the water return flange 21f. The area of the water return flange 21f is sufficiently smaller than the mounting flange 24f. As shown in FIG. 3B, the water return flange 21 f is addressed to the back surface (surface facing the interior) of the exterior material 12.

  As shown in FIGS. 1 and 2, an inner cylinder 22 is disposed inside the outer cylinder 21. The inner cylinder 22 has a cylindrical shape that is smaller in diameter than the outer cylinder 21 and longer than the outer cylinder 21. The material of the inner cylinder 22 is a metal such as galvanized steel, stainless steel, high corrosion-resistant hot dip plated steel, or aluminum. Preferably, the inner cylindrical body 22 is configured by a spiral tube in which a metal strip is wound in a spiral shape and the overlapping portion is goug-fitted. An end portion on the outdoor side (right side in FIG. 1) of the inner cylindrical body 22 protrudes to the outdoor side from the outer cylindrical body 21. As shown in FIG. 3 (b), this protrusion amount substantially corresponds to the thickness of the exterior material 12. The protruding end portion of the inner cylindrical body 22 is fitted into the through hole portion 19 b of the exterior material 12. A vent cap 26 is provided on the outer surface of the exterior material 12. The vent cap 26 covers the through-hole portion 19b and is fitted into the opening 29 at the end of the inner cylinder 22 on the outdoor side.

  An annular heat insulating layer 23 is provided between the outer cylindrical body 21 and the inner cylindrical body 22. Although the material of the heat insulation layer 23 is comprised with the glass fiber felt, it is not restricted to this, Glass wool, ceramic wool, rock wool, etc. may be sufficient. The inner rib 21 c bites into the heat insulating layer 23. Thereby, the adhesion degree of the outer cylinder 21 and the heat insulation layer 23 is improved. The end face on the outdoor side of the heat insulating layer 23 is substantially flush with the end face on the outdoor side of the outer cylinder 21, and is exposed from between the outer cylinder 21 and the inner cylinder 22. As shown in FIG. 3B, the end face on the outdoor side of the heat insulating layer 23 is assigned to the back surface of the exterior material 12.

  As shown in FIG. 1, a cap material 30 is provided on the outer wall 10 under construction, that is, the sleeve penetration portion construction structure 1. As shown in FIGS. 1 and 2, the cap member 30 includes a cover portion 31 and an edge string 32. The cover part 31 is comprised with the thin resin film, and has flexibility (easy-deformability). The cover part 31 has a thickness of about 10 μm to 300 μm, for example. The material of the cover part 31 is, for example, polyethylene (PE) or polypropylene (PP), but is not limited thereto. The unfolded shape of the cover part 31 before joining to the edge string 32 is substantially circular.

  An edge string 32 is provided on the periphery of the cover portion 31. The edge string 32 is made of rubber or the like that is annular and stretchable. Preferably, the edge string 32 has a thin flat band shape. The thickness of the edge string 32 in the natural state is, for example, about 10 μm to 300 μm. The peripheral length of the edge string 32 in the natural state (when not stretched) is shorter than the outer peripheral length of the cover portion 31 before joining with the edge string 32, and the outer peripheral length of the outer cylindrical body 21 of the sleeve 20 and thus the water return flange 21f. It is shorter than the perimeter of the outer periphery. The edge string 32 is joined to the peripheral edge of the cover portion 31 over the entire circumference by joining means such as fusion, adhesion, and sewing. At the time of joining, for example, the edge string 32 is extended in accordance with the outer peripheral length of the cover portion 31, and after the joining, the edge string 32 is released and returned to the natural length. As a result, the peripheral portion of the cover portion 31 is shrunk into a gather shape, and the outer peripheral portion of the cover portion 31 including the peripheral portion is folded or turned to the indoor side. The general shape of the cap member 30 when the cover 31 is inflated is a slightly flat hemispherical shape and is open to the indoor side. The cap material 30 can be folded and unfolded.

  As shown in FIG. 1, the cap material 30 is attached to an end portion on the outdoor side of the sleeve 20 in the outer wall 10 under construction. The cover portion 31 of the cap material 30 covers the opening 29 of the sleeve 20, covers the exposed end surface of the heat insulating layer 23 on the outdoor side, and further wraps around the indoor side of the water return flange 21 f. And the edge string 32 is extended | stretched rather than a natural state, and is latched elastically over the perimeter of the indoor side surface of the water return flange 21f, or the outer peripheral surface of the fitting cylinder part 24b.

A construction method of the outer wall 10 and a penetration part construction method will be described focusing on a method of using the cap material 30.
As shown in FIG. 1, after the wall plate member 11 and the shaft assembly 16 of the outer wall 10 are constructed and the sleeve 20 of the ventilation duct 2 is fitted into the through hole 19 of the wall plate member 11, the end portion of the sleeve 20 on the outdoor side The cap material 30 is attached to
That is, the cover portion 31 of the cap member 30 is placed on the projecting portion of the inner cylindrical body 22 on the outdoor side and the exposed end surface of the heat insulating layer 23 on the outdoor side. Further, the outer peripheral portion of the cover portion 31 is placed on the water return flange 21f, and the edge string 32 is extended and positioned on the indoor side with respect to the water return flange 21f. Thereby, the edge string 32 is elastically locked over the entire circumference of the indoor side surface of the water return flange 21f or the outer peripheral surface of the fitting tube portion 24b (and eventually the end portion on the outdoor side of the sleeve 20). In this way, the cap member 30 can be easily attached to the end portion of the sleeve 20 on the outdoor side. Since the water return flange 21 f serves as a locking member for the edge string 32, the cap material 30 can be stably disposed at the end of the sleeve 20 on the outdoor side.

Even if the opening 20 of the sleeve 20 is exposed to the outside, the cover 29 of the cap member 30 covers the opening 29, so that foreign matters such as rain, snow, dust, and small animals can pass through the opening 29 into the inner cylinder 22. As a result, it can prevent entering into the ventilation duct 2.
In addition, by covering the exposed end face of the heat insulating layer 23 to the outdoor side with the cover portion 31, rainwater permeates into the heat insulating layer 23 during the construction period of the outer wall 10, and dust adheres to the heat insulating layer 23. Can be prevented.

As shown in FIG. 3A, the installation process of the exterior material 12 of the outer wall 10 and the installation process of the interior material 13 are performed in a state where the cap material 30 is attached to the end of the sleeve 20 on the outdoor side. Accordingly, it is possible to prevent foreign matters such as dust from the exterior material 12 from entering the inner cylindrical body 22 from the opening 29, particularly when installing the exterior material 12.
By installing the exterior material 12, the cover portion 31 is sandwiched between the exterior material 12 and the sleeve 20. Since the cover portion 31 is a thin film, it can be sufficiently accommodated in the gap between the exterior material 12 and the sleeve 20, and does not hinder the installation of the exterior material 12.

After installation of the exterior material 12 (after the end of the required period), the cap material 30 is removed. As shown by the arrow in FIG. 3A, when removing, for example, the center part of the cover part 31 is grasped and pulled outward. Thereby, the cap member 30 can be easily pulled out from the sleeve 20. At this time, the edge string 32 moves over the water return flange 21f and moves to the outdoor side. By making the protruding height of the water return flange 21f preferably about 3 mm to 10 mm (more preferably about 7 mm), the edge string 32 can easily get over the water return flange 21f. Further, since the cover portion 31 is a thin film having a thickness of micron order, and the edge string 32 is a thin flat band having a thickness of micron order, the cover part 31 and the edge string 32 are disposed between the exterior member 12 and the sleeve 20. It can be easily pulled out from the gap.
Thereafter, the vent cap 26 is installed in the opening 29.

The cap material 30 is very easy to attach to and remove from the sleeve 20 compared to the curing tape. Therefore, construction can be performed efficiently and the construction period can be shortened.
Furthermore, the removed cap member 30 can be reused, and the material cost can be reduced.
Further, the cap material 30 is compacted by being folded and is thin, so that even if a large number of cap materials 30 are stacked, the cap material 30 is not so bulky. Therefore, carrying, storage, storage, etc. can be easily performed.

  In the outer wall 10, the condensed water attached to the back surface of the exterior material 12 flows downward along the back surface (surface facing the indoor side) of the water return flange 21f. As a result, it is possible to prevent the condensed water from entering the heat insulating layer 23 or entering the inner cylindrical body 22.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are attached to the drawings for the same configurations as those described above, and the description is simplified.
4 and 5 show a second embodiment of the present invention. 2nd Embodiment concerns on the sleeve penetration part construction structure 4 and construction method of the steel beam 40 (structure with a through-hole) of steel building B (building), such as an office building. A circular through hole 49 is formed in the web 41 of the steel beam 40. A sleeve 50 is inserted into the through hole 49. The sleeve 50 is for supporting the ventilation duct 5 indicated by a two-dot chain line in FIG. 5 and has a cylindrical shape. The sleeve 50 penetrates the steel beam 40, the central portion thereof is positioned in the through hole 49, and both end portions protrude to both sides of the web 41. Although illustration is omitted, support means is provided on the outer periphery of the sleeve 50, and the sleeve 50 is supported by the steel beam 40 through this support means.

  As shown in FIG. 5, a fireproof coating material 45 is applied to the outer surface of the steel beam 40. Prior to this application, the cap material 30 is attached to each end of the sleeve 50. That is, the cover portions 31 of the pair of cap materials 30 are respectively placed on the openings 59 at both ends of the sleeve 50, and the edge string 32 of each cap material 30 is placed on the outer periphery of the end portion of the sleeve 50. Thereby, the cap member 30 can be easily attached to the sleeve 50. The peripheral length of the edge string 32 in the natural state is shorter than the outer peripheral length of the sleeve 50. Therefore, the edge string 32 is elastically locked to the outer peripheral surface of the sleeve 50. As a result, the cap member 30 can be stably disposed at the end of the sleeve 50.

  The opening 59 at the end of the sleeve 50 can be closed by the cover portion 31 of the cap material 30. Therefore, it is possible to prevent the scattering body (foreign matter) of the fireproof coating material 45 from entering the sleeve 50 during the application of the fireproof coating material 45.

  After application of the fireproof covering material 45 (after the end of the required period), the cap material 30 is removed. At the time of removal, the cap member 30 can be easily pulled out from the sleeve 50 by grasping the center portion of the cover portion 31 and pulling it to the opposite side to the web 41 side.

  Thereafter, the ventilation duct 5 is inserted into the sleeve 50. Since the fireproof covering material 45 does not adhere to the inside of the sleeve 50, the insertion work of the ventilation duct 5 can be performed easily.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the mounting time and the removal time of the cap material 30 on the sleeves 20 and 50 may be appropriately changed. In the first embodiment, the cap material 30 may be removed from the sleeve 20 before the exterior material 12 is installed.
The shape of the sleeves 20 and 50 is not limited to a cylindrical shape, and may be a rectangular tube shape such as a square tube. Even in that case, the edge string 32 can be locked to the entire circumference of the outer peripheral surface of the sleeve 20 or 50 by elasticity.
In the first embodiment, the cap member 30 may be attached to the end portion on the indoor side (left side in FIG. 1) of the sleeve 20 before connecting the duct body 2a.
The present invention is not limited to the wooden house A and the steel building B as long as the building has a sleeve penetrating portion, and can also be applied to a building having a reinforced concrete structure. The sleeve penetrating portion is not limited to the ventilation duct, and may be one that passes a gas pipe or a water pipe, or may be one that passes an electric line or a communication line.
The water return flange 21 f can also be applied to the sleeve 20 that is installed without using the cap material 30.

  The present invention can be applied to the construction of a duct penetration part of a building such as a wooden house or a steel structure.

A wooden house (building)
B Steel building (building)
1 Sleeve penetration construction structure 10 Outer wall (structure with through hole)
19 Through-hole 20 Sleeve 21 Outer cylinder 21f Water return flange 22 Inner cylinder 23 Heat insulation layer 29 Opening (opening at the end of the sleeve, opening on the outdoor side)
30 Cap material 31 Cover part 32 Edge string 4 Sleeve penetration part construction structure 40 Steel beam (structure with through hole)
49 Through hole 50 Sleeve 59 Opening

Claims (3)

A sleeve provided in the through hole of the structure with the through hole of the building;
A cap material detachably provided at the opening of the end of the sleeve;
A mounting flange that protrudes radially outward and is fixed to the structure with the through hole is provided on an outer periphery of the sleeve, and a portion of the outer periphery of the sleeve that is closer to the end portion than the mounting flange. An annular locking member that protrudes radially outward is provided,
The cap material has a flexible cover portion that covers the opening, and an annular and expandable / contractible edge string provided on the periphery of the cover portion,
The edge string is elastically locked to the entire circumference of the surface of the locking member facing the mounting flange or the outer peripheral surface of the sleeve between the locking member and the mounting flange. Construction structure for sleeve penetration. The sleeve has an outer cylinder, an inner cylinder provided inside the outer cylinder, and an annular heat insulating layer provided between the outer cylinder and the inner cylinder,
A water return flange serving as the locking member is formed at the outdoor end of the outer cylinder,
The cover portion of the cap material covers the outdoor-side opening of the inner cylinder and covers the end surface of the heat-insulating layer on the outdoor side, and the outer peripheral portion of the cover portion covers the water return flange from the outdoor side to the indoor side. The edge string is elastically locked to an indoor surface facing the mounting flange side of the water return flange or an outer peripheral surface of the sleeve between the water return flange and the mounting flange. The sleeve penetration part construction structure of Claim 1 characterized by these. A sleeve is provided in the through hole of the structure with a through hole of the building under construction, and a mounting flange protruding radially outward from the outer periphery of the sleeve is fixed to the structure with the through hole,
Preparing a cap material having a flexible cover part and an annular and stretchable edge string provided on the periphery of the cover part;
Covering the opening at the end of the sleeve with the cover,
A surface of the annular locking member that protrudes radially outward from a portion of the sleeve closer to the end than the mounting flange of the sleeve faces the mounting flange, or the locking member and the mounting of the sleeve. Elastically locked to the entire circumference of the outer peripheral surface between the flange,
The sleeve penetration part construction method, wherein the cap material is removed after a required period.

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