JP7553333B2 - Sleeve, through hole structure, and sleeve installation method - Google Patents

Description

The present invention relates to a sleeve, a through-hole structure, and a method for installing the sleeve.

In order to pass a penetrating member through a through hole that penetrates a partition wall of a building in the wall thickness direction, a sleeve is arranged in the through hole of the partition wall (see, for example, Patent Document 1).
As shown in Fig. 21, a large opening 111a is formed in one wall plate 111 of a hollow wall 110 serving as a partition wall, and a small opening 112a is formed in the other wall plate 112. A through hole 114 formed in the hollow wall 110 is formed such that the large opening 111a and the small opening 112a communicate with each other via an internal space 113 between the two wall plates 111, 112. The small opening 112a is of a size necessary for inserting a cable, which is an example of a penetrating member. The large opening 111a and the small opening 112a are each a rectangular hole, and are similar in shape to each other.

The frame 115, which serves as a sleeve and is placed in the through hole 114, has a rectangular cylindrical tube portion 116, a rectangular frame-shaped large flange portion 117, and a rectangular frame-shaped small flange portion 118. The tube portion 116 is sized to be inserted into the large opening 111a. The tube portion 116 is one size larger than the small opening 112a.

The large flange portion 117 is connected to one axial end edge of the tubular portion 116. The outer peripheral edge of the large flange portion 117 is one size larger than the large-size opening 111a. The outer peripheral edge of the small flange portion 118 is connected to the other axial end edge of the tubular portion 116. The inner peripheral edge of the small flange portion 118 is the same as or slightly larger than the small-size opening 112a.

The frame 115 is inserted through the large opening 111a in the through hole 114. The large flange portion 117 is in close contact with the outer surface of one wall panel 111. The small flange portion 118 is in close contact with the inner surface of the other wall panel 112. The frame 115 is used to prevent small animals and flames from entering the internal space 113 through the large opening 111a and the small opening 112a. Wiring and piping materials are inserted into the frame 115.

JP 2006-104738 A

However, through holes 114 of various sizes are formed in the hollow wall 110. In order to match the size of the frame body 115 to the size of the through holes 114 that are formed, it is necessary to prepare a plurality of types of frame bodies 115 of different sizes. Alternatively, when using a frame body 115 of one size, it is necessary to form the through holes 114 to match the size of the frame body 115.

The sleeve for solving the above problem is a sleeve that penetrates a partition wall in the wall thickness direction and surrounds a penetrating member that is disposed in a through hole that is rectangular when viewed in the wall thickness direction, and has a peripheral wall formed into a rectangular frame by combining four peripheral wall constituents, and if the direction in which the internal space surrounded by the peripheral wall opens is the penetrating direction of the peripheral wall, each of the four peripheral wall constituents is L-shaped when viewed along the penetrating direction and is made of a metal plate that has a constant width in the penetrating direction, has a corner forming portion and two plate portions that protrude perpendicularly from the corner forming portion and have a constant width in the protruding direction, the peripheral wall has four side walls, and each side wall is formed by overlapping the tip of the plate portion of one of the peripheral wall constituents adjacent to each other in the circumferential direction of the peripheral wall with the tip of the plate portion of the other peripheral wall constituent in the plate thickness direction, and the gist is that the overlap length in the protruding direction is changed to expand and reduce the internal space.

The sleeve for solving the above problem is a sleeve that penetrates a partition wall in the wall thickness direction, and surrounds a penetrating member that is disposed within a through hole that is rectangular as viewed in the wall thickness direction, and is provided with a peripheral wall that is formed into a rectangular frame by combining multiple peripheral wall components made of metal plates, the peripheral wall components having four bending members and two or four straight portion forming members, and when the direction in which the internal space surrounded by the peripheral wall opens is taken as the penetrating direction of the peripheral wall, each of the four bending members is L-shaped as viewed along the penetrating direction and is made of metal plate having a constant width in the penetrating direction, and has a square shape. The peripheral wall has four side walls, and at least two of the four side walls are composed of a tip end of one of the plate parts of the two bending members located apart in the peripheral wall in the circumferential direction, a tip end of the other plate part, and the straight part forming body overlapped in the plate thickness direction with both tip parts so as to connect the two tip parts, and the internal space is expanded or contracted by changing the overlap length in the protruding direction.

For the sleeve, the peripheral wall may be formed only from the four bending members, and each side wall may be formed by overlapping the tip of the plate portion of one peripheral wall component adjacent to the peripheral wall in the circumferential direction with the tip of the plate portion of the other peripheral wall component in the plate thickness direction.

Regarding the sleeve, the peripheral wall has a rectangular frame-shaped flange that protrudes outward from one end edge in the penetration direction, and all of the plurality of peripheral wall constituent bodies have a plate-shaped flange forming portion that forms the flange at one end edge in the penetration direction, and two flange forming portions adjacent to each other in the circumferential direction are overlapped in the plate thickness direction of the flange forming portion, the peripheral wall has two sets of two side walls that face each other in the four side walls, each of the two side walls of one set is constituted by two of the bending members and one of the straight portion forming bodies, and each of the side walls of the other set is constituted by the two bending members of one set that face each other via the internal space, and in one of the two side walls of one set, the two bending members that are located apart in the circumferential direction are constituted by the two bending members. The outer polymer is polymerized on the outside of the rectangular frame shape with respect to the first straight portion forming body connecting two bending members, and the flange forming portion is polymerized on the other end edge side in the penetration direction from the flange forming portion of the first straight portion forming body, and the two bending members located apart in the circumferential direction in the other side wall of the two side walls of one of the sets are inner polymers polymerized on the inside of the rectangular frame shape with respect to the second straight portion forming body connecting the two bending members, and the flange forming portion is polymerized on the one end edge side in the penetration direction from the flange forming portion of the second straight portion forming body, and in each of the two side walls of the other set, the tip portion of the plate portion of the outer polymer may be polymerized so as to be outside the tip portion of the plate portion of the inner polymer.

For a sleeve, the peripheral wall has the flange at the other end edge in the penetration direction, and all of the four bending members have the flange forming portion at the other end edge in the penetration direction, and when the peripheral wall is composed of only the four bending members, and each of the two side walls of one set and each of the two side walls of the other set are composed of two bending members, the outer polymer and the inner polymer may face each other through the internal space in one set, and the outer polymer and the inner polymer may face each other through the internal space in the other set.

The sleeve for solving the above problem is a sleeve that penetrates a partition wall in the wall thickness direction and surrounds a penetrating member that is disposed in a through hole that is rectangular when viewed in the wall thickness direction, and has a rectangular frame-shaped peripheral wall formed by combining multiple peripheral wall components, the penetrating direction is the direction in which the internal space surrounded by the peripheral wall opens, each of the peripheral wall components is made of a metal plate having a plate portion with a constant width in the penetrating direction, the peripheral wall has four side walls, and each side wall is formed by overlapping a tip end of one peripheral wall component of at least two peripheral wall components adjacent to each other in the circumferential direction of the peripheral wall with a tip end of the other peripheral wall component in the plate thickness direction, and the gist is that the overlap length of the peripheral wall in the circumferential direction is changed to expand and contract the internal space.

For the sleeve, the peripheral wall has a rectangular frame-shaped flange at one end edge in the penetration direction that protrudes outward from the peripheral wall, and all of the multiple peripheral wall constituents have a plate-shaped flange forming portion that forms the flange at one end edge in the penetration direction, and the flange forming portions of two peripheral wall constituents adjacent in the circumferential direction may overlap in the plate thickness direction of the flange forming portion.

In the sleeve, the flange forming portions adjacent to each other in the circumferential direction may be arranged such that an order of overlapping in the plate thickness direction is alternated in the circumferential direction.
The sleeve may include a joining member that joins the tip end of one of the plate portions and the tip end of the other of the plate portions adjacent to each other in the circumferential direction.

The sleeve may include a retaining member that maintains a state in which the peripheral wall is formed by joining the peripheral wall constituent bodies adjacent to each other in the circumferential direction.
With respect to the sleeve, the length from the base end to the tip end of one of the two plate portions of the peripheral wall constituent may be different from the length from the base end to the tip end of the other plate portion.

For a sleeve, the two peripheral wall components, in which the tip ends of the plate portions are overlapped in the plate thickness direction, may fit together and overlap, and may have a guide portion that guides the adjustment of the overlap length in the peripheral direction by sliding.

The sleeve may have an outer blocking member that has a thickness greater than the dimension in the thickness direction of the peripheral wall constituent and is compressible and deformable in the thickness direction by an amount equal to or greater than the thickness of the peripheral wall constituent.

The through hole structure for solving the above problems is characterized in that a penetrating member is disposed in a through hole that penetrates a partition wall in the wall thickness direction and is rectangular when viewed in the wall thickness direction, the penetrating member is surrounded by a sleeve in the through hole, the sleeve has a rectangular frame-shaped peripheral wall formed by combining multiple peripheral wall components, the penetrating direction is the direction in which the internal space surrounded by the peripheral wall opens, the peripheral wall has four side walls, each of the multiple peripheral wall components is made of a metal plate having a constant width in the penetrating direction, the side walls are arranged such that two peripheral wall components are adjacent to each other in the circumferential direction of the peripheral wall, the tips of the two adjacent peripheral wall components overlap in the plate thickness direction of the peripheral wall components, and an outer blocking member that is compressed and deformed in the plate thickness direction of the peripheral wall components is disposed between the overlapped peripheral wall components and the inner surface of the through hole.

The sleeve installation method for solving the above problem is a sleeve installation method that penetrates a partition wall in the wall thickness direction and surrounds a penetrating member that is disposed in a through hole that is rectangular as viewed in the wall thickness direction, and the sleeve has a peripheral wall formed by combining four peripheral wall components into a rectangular frame shape, and when the direction in which the internal space surrounded by the peripheral wall opens is defined as the penetration direction and the direction in which the internal space is surrounded is defined as the circumferential direction, the sleeve is L-shaped as viewed along the penetration direction and is made of a metal plate that has a constant width in the penetration direction, and four peripheral wall components are arranged in the through hole, each having an angular forming portion and two plate portions that protrude perpendicularly from the angular forming portion and have a constant width in the protruding direction, and the multiple peripheral wall components are adjacent to each other so that the protruding direction extends in the circumferential direction, and the tip of the plate portion of one of the two adjacent peripheral wall components and the tip of the plate portion of the other peripheral wall component are overlapped in the plate thickness direction of both tips to form the sleeve with the peripheral wall.

The present invention allows for flexible response to the size of the through-hole.

FIG. FIG. FIG. FIG. FIG. 13 is a perspective view showing the state in which an outer blocking member is placed along the inner surface of the through hole. FIG. A front view of the state in which an outer blocking member is placed along the inner surface of the through hole. FIG. 13 is a perspective view showing a state in which a first bending member is disposed in a through hole. FIG. 13 is a front view showing a state in which the second bending member is disposed in the through hole. FIG. 13 is a front view showing the state in which the third bending member is disposed in the through hole. FIG. 4 is a front view showing the state in which the sleeve is placed in the through hole. FIG. FIG. 11 is a front view showing a sleeve according to a second embodiment. FIG. 13A is a perspective view showing a sleeve according to a third embodiment, and FIG. 13B is an enlarged view showing an overlapping portion of a flange forming portion. FIG. 13 is a perspective view showing components of a sleeve of the third embodiment; FIG. 13 is a plan view showing a sleeve according to a third embodiment. FIG. 11 is a plan view showing a sleeve according to another embodiment. FIG. FIG. 11 is a front view showing another example of a sleeve. FIG.

First Embodiment
A first embodiment embodying a sleeve, a through-hole structure, and a sleeve installation method will be described below with reference to FIGS.

As shown in Figures 1 and 2, the fireproof hollow wall W as a partition wall is constructed from a number of lightweight steel members 10 and a first partition wall 11 and a second partition wall 12 erected on either side of the lightweight steel members 10. The first partition wall 11 and the second partition wall 12 are made of, for example, gypsum board.

A cavity S is formed between the first partition wall 11 and the second partition wall 12, which face each other with the lightweight steel material 10 in between. The fireproof hollow wall W has a through hole 14 for passing a fluid pipe 13, which is an example of a penetrating member. The through hole 14 penetrates the fireproof hollow wall W in the wall thickness direction. The wall thickness direction of the fireproof hollow wall W is the direction in which the first partition wall 11 and the second partition wall 12 are arranged side by side. Examples of penetrating members include wiring (control cables, coaxial cables, optical cables, etc.) and piping materials (synthetic resin flexible electrical conduits, steel electrical conduits, fluid pipes, etc.) arranged within a building.

The fluid pipe 13 is covered with a cylindrical insulating material 17. A fire-resistant member 18 is wrapped around the insulating material 17. The fire-resistant member 18 is in the form of a rectangular sheet. The fire-resistant member 18 includes a thermally expandable fire-resistant layer (not shown). The fire-resistant member 18 wrapped around the insulating material 17 is fastened in the circumferential direction of the fluid pipe 13 by wire 19, thereby being wrapped around the insulating material 17.

The through hole 14 is formed by communication between the first hole 11a in the first partition wall 11, the second hole 12a in the second partition wall 12, and the cavity S. In a front view of the first partition wall 11 from the front side of the wall, the first hole 11a is rectangular, and in a front view of the second partition wall 12 from the front side of the wall, the second hole 12a is rectangular. The center point P1 of the first hole 11a and the center point P2 of the second hole 12a coincide with the wall thickness direction of the fireproof hollow wall W. The through hole 14 penetrates the fireproof hollow wall W in the wall thickness direction and is rectangular when viewed in the wall thickness direction.

Next, a through-hole structure in which the fluid pipe 13 passes through the through-hole 14 will be described.
In the through hole 14, the rectangular frame-shaped sleeve 20 surrounds the fluid pipe 13 that is disposed penetrating the through hole 14. The fluid pipe 13 is inserted into the sleeve 20, so that the fluid pipe 13 penetrates the through hole 14 of the fireproof hollow wall W. A filler 15 is filled between the inner surface of the sleeve 20 and the outer peripheral surface of the fluid pipe 13 via the heat insulating material 17 and the fireproof member 18. The filler 15 closes the gap between the inner surface of the sleeve 20 and the outer peripheral surface of the fluid pipe 13 via the heat insulating material 17 and the fireproof member 18. The filler 15 is made of a flame-retardant heat-expandable heat-resistant material, but may be made of a non-flammable heat-expandable material or may not have heat-expandability.

An outer blocking member 16 is disposed between the inner surface of the first hole 11a and the outer surface of the sleeve 20, and between the inner surface of the second hole 12a and the outer surface of the sleeve 20. The outer blocking member 16 is made of non-breathable rock wool. The material of the outer blocking member 16 can be changed as appropriate as long as it is made of a non-flammable material such as ceramic wool. The outer blocking member 16 is in the form of a long and thin strip and a sheet. The outer blocking member 16 is formed by cutting a large sheet-shaped outer blocking member 16, but a long and thin sheet-shaped member may be used in advance.

As shown in FIG. 6, the dimension of the outer blocking member 16 in the short side direction is equal to or greater than the wall thickness of the first partition wall 11 and the wall thickness of the second partition wall 12. However, if the dimension of the outer blocking member 16 in the short side direction is greater than the wall thickness of the first partition wall 11 and the wall thickness of the second partition wall 12, the outer blocking member 16 protrudes toward the cavity S and does not protrude to the front side of the fireproof hollow wall W.

In the outer blocking member 16, the direction perpendicular to the short side direction and the long side direction is defined as the thickness direction, and the dimension of the outer blocking member 16 in the thickness direction is defined as the thickness. The outer blocking member 16 can be compressed and deformed in the thickness direction, and the thickness can be reduced by compression.

As shown in FIG. 2, an outer blocking member 16 is arranged along the inner surface of the first hole 11a in the first partition wall 11 and the inner surface of the second hole 12a in the second partition wall 12. The outer blocking member 16 arranged in the first hole 11a blocks the gap between the inner surface of the first hole 11a and the outer surface of the sleeve 20 facing the inner surface. The outer blocking member 16 arranged in the second hole 12a blocks the gap between the inner surface of the second hole 12a and the outer surface of the sleeve 20 facing the inner surface. The outer blocking member 16 is compressed in the thickness direction between the inner surfaces of the holes 11a and 12a and the outer surface of the sleeve 20. The compressed and deformed outer blocking member 16 returns to its original shape, deforming along and contacting the inner surfaces of the holes 11a and 12a and the outer surface of the sleeve 20. In other words, the outer blocking member 16 blocks the gap between the inner surfaces of the holes 11a and 12a and the outer surface of the sleeve 20.

The through hole 14 in the fireproof hollow wall W is blocked using a filler 15, an outer blocking member 16, and a sleeve 20. In other words, the filler 15, the outer blocking member 16, and the sleeve 20 form a through hole structure that blocks the through hole 14.

Next, the sleeve 20 will be described.
3 and 5, the sleeve 20 includes a peripheral wall 21 formed into a rectangular frame shape by combining four bending members 30, which are an example of a peripheral wall constructing body. The sleeve 20 in Fig. 5 is a reduced version of the sleeve 20 shown in Fig. 3.

An internal space K is defined inside the peripheral wall 21. The direction in which the central axis L of the peripheral wall 21 extends is the direction in which the internal space K opens, and the direction in which the central axis L extends is defined as the penetration direction Z. The peripheral wall 21 has four side walls 22 and corners 23 formed at the intersections of adjacent side walls 22. Each of the four side walls 22 is in the shape of a rectangular plate. In the peripheral wall 21, the direction surrounding the internal space K is defined as the circumferential direction.

Next, a description will be given of the bending members 30. Since the four bending members 30 have the same shape and size, a specific description will be given of one bending member 30.
As shown in Fig. 4, the bending member 30 is formed by bending a metal plate having an elongated rectangular shape in the plate thickness direction into an L shape. The bending member 30 has a first plate portion 31 having a rectangular plate shape, a second plate portion 32 perpendicular to the first plate portion 31, and an angle forming portion 33 located at the intersection of the first plate portion 31 and the second plate portion 32. Therefore, the bending member 30 is made of a metal plate having an L shape when viewed along the penetration direction Z and a constant width in the penetration direction Z. The bending member 30 also has the angle forming portion 33 and two plate portions that protrude from the angle forming portion 33 perpendicularly to each other in the protruding direction and have a constant width in the protruding direction, one plate portion being the first plate portion 31 and the other plate portion being the second plate portion 32.

The first plate portion 31 has a rectangular first inner surface 31a on one side in the plate thickness direction, and a rectangular first outer surface 31b on the other side in the plate thickness direction. The second plate portion 32 has a rectangular second inner surface 32a on one side in the plate thickness direction, and a rectangular second outer surface 32b on the other side in the plate thickness direction.

The first inner surface 31a of the first plate portion 31 is perpendicular to the second inner surface 32a of the second plate portion 32. The first outer surface 31b of the first plate portion 31 is perpendicular to the second outer surface 32b of the second plate portion 32. When the first plate portion 31 is viewed in the plate thickness direction, the direction in which the long sides of the first inner surface 31a and the first outer surface 31b extend is defined as the first direction H1 of the first plate portion 31. The first direction H1 is the direction in which the two long edges of the first plate portion 31 extend. The first direction H1 is the protruding direction in which the first plate portion 31 protrudes from the second plate portion 32.

When the second plate portion 32 is viewed in the plate thickness direction, the direction in which the short sides of the second inner surface 32a and the second outer surface 32b extend is the second direction H2 of the second plate portion 32. The second direction H2 is the direction in which the two short edges of the second plate portion 32 extend. The second direction H2 is the protruding direction in which the second plate portion 32 protrudes from the first plate portion 31.

The direction in which the short sides of the first inner surface 31a and the first outer surface 31b extend is the same as the direction in which the long sides of the second inner surface 32a and the second outer surface 32b extend, and these directions are referred to as the width direction H3. The dimension of the first plate portion 31 in the width direction H3 is constant in the first direction H1. Therefore, the first plate portion 31 has a constant width that does not change along the first direction H1, which is the protruding direction from the corner forming portion 33. The dimension of the second plate portion 32 in the width direction H3 is constant in the second direction H2. Therefore, the second plate portion 32 has a constant width that does not change along the second direction H2, which is the protruding direction from the corner forming portion 33. The dimension of the first plate portion 31 in the width direction H3 is equal to the dimension of the second plate portion 32 in the width direction H3. The dimension from the base end to the tip of the first plate portion 31 along the first direction H1 is longer than the dimension from the base end to the tip of the second plate portion 32 along the second direction H2. In other words, the dimension of the first plate portion 31 along the first direction H1 is different from the dimension of the second plate portion 32 along the second direction H2.

The corner forming portion 33 is the portion where the first plate portion 31 and the second plate portion 32 intersect. In the bending member 30, the base ends of the first plate portion 31 and the second plate portion 32 are located at the corner forming portion 33, and are located at the boundary between the first plate portion 31 and the second plate portion 32. In the first plate portion 31, the edge located at the tip of the first plate portion 31 is the first tip edge 31c, and the edge located at the tip of the second plate portion 32 is the second tip edge 32c. The first tip edge 31c and the second tip edge 32c have a thin dimension in the plate thickness direction, and a dimension in the width direction H3 that is greater than the dimension in the plate thickness direction.

As described above, the peripheral wall 21 is formed by combining four of the bending members 30. Specifically, as shown in FIG. 3 or FIG. 5, the peripheral wall 21 is formed by arranging the four bending members 30 to form a square frame. The four corners 23 of the peripheral wall 21 are formed by the corner forming portions 33 of the four bending members 30.

Each side wall 22 is formed by combining a first plate portion 31 of one of two circumferentially adjacent bending members 30 with a second plate portion 32 of the other. In other words, each side wall 22 is formed by overlapping the tip end of the first plate portion 31 of one circumferentially adjacent bending member 30 with the tip end of the second plate portion 32 of the other sleeve 20 in the plate thickness direction.

The reference method is a method of forming the peripheral wall 21 while butting the first leading edge 31c of the first plate portion 31 against the second leading edge 32c of the second plate portion 32 to form the side wall 22. Figure 3 shows the peripheral wall 21 formed by the reference method.

On the other hand, as shown in FIG. 5, the reduction method is to form the peripheral wall 21 while the tip of the first plate portion 31 of one of two adjacent bending members 30 is adjacent to the tip of the second plate portion 32 of the other bending member 30 and overlaps the plate portions 31, 32 in the thickness direction to form the side wall 22.

At this time, it is preferable to unify which of the first plate portion 31 and the second plate portion 32 is on the outside in the overlapping direction for each of the four side walls 22. However, it is optional which of the first plate portion 31 and the second plate portion 32 is on the outside in the overlapping direction. When the first plate portion 31 is on the outside of the second plate portion 32 in the overlapping direction, the first inner surface 31a contacts the second outer surface 32b, and when the second plate portion 32 is on the outside of the first plate portion 31 in the overlapping direction, the second inner surface 32a contacts the first outer surface 31b.

When the four bending members 30 are combined to form the peripheral wall 21, if the side walls 22 are formed using the standard method, the circumferential dimension of each of the four side walls 22 will be maximum. On the other hand, if the side walls 22 are formed using the reduction method, the circumferential dimension of each of the four side walls 22 will be smaller than that of the side walls 22 formed using the standard method.

When the side wall 22 is formed by the reduction method, the greater the amount of overlap between the first plate portion 31 and the second plate portion 32 along the circumferential direction of the peripheral wall 21, the smaller the dimension of the side wall 22 in the circumferential direction of the peripheral wall 21 can be. In addition, in the peripheral wall 21 formed by the reduction method, the internal space K of the peripheral wall 21 can be expanded or contracted by increasing or decreasing the overlap length between the first plate portion 31 and the second plate portion 32.

The peripheral wall 21 has two sets of two opposing side walls 22 among the four side walls 22, and the overlap length of the two side walls 22 that make up a set is the same. If the overlap length of the two sets is the same, the peripheral wall 21 is formed in a square rectangular frame shape when viewed in the penetration direction Z, and if the overlap length of the two sets is different, the peripheral wall 21 is formed in a rectangular rectangular frame shape when viewed in the penetration direction Z.

In each of the four side walls 22 of the peripheral wall 21, the tip of the first plate portion 31 and the tip of the second plate portion 32 are joined by a joining member 50. In this embodiment, the joining member 50 is aluminum tape.

In the standard method and the reduced method, the joining member 50 is attached across the first inner surface 31a at the tip of the first plate portion 31 and the second inner surface 32a at the tip of the second plate portion 32, or across the first outer surface 31b at the tip of the first plate portion 31 and the second outer surface 32b at the tip of the second plate portion 32. In the peripheral wall 21, each side wall 22 has one location where the tip of the first plate portion 31 and the tip of the second plate portion 32 overlap or are adjacent to each other. Therefore, there are four locations on the peripheral wall 21 where the two bending members 30 are joined by the joining member 50.

The four bending members 30 are assembled together by joining two adjacent bending members 30 with joining members 50, and the rectangular frame shape of the peripheral wall 21 is maintained. Therefore, the four joining members 50 function as maintaining members that maintain the shape of the peripheral wall 21. The sleeve 20 is composed of the peripheral wall 21 formed from the four bending members 30 and the four joining members 50.

As shown in FIG. 3, when the peripheral wall 21 is formed using the standard method, the first plate portion 31 and the second plate portion 32 that are adjacent in the circumferential direction in each side wall 22 are joined by the joining member 50 with the first leading edge 31c and the second leading edge 32c butted against each other. Even when the peripheral wall 21 is formed using the standard method, the surfaces to which the joining member 50 is attached to the first plate portion 31 and the second plate portion 32 may be appropriately selected.

The dimension of the peripheral wall 21 in the penetration direction Z is greater than the wall thickness of the fireproof hollow wall W. Therefore, when the sleeve 20 is placed in the through hole 14, both ends of the peripheral wall 21 in the penetration direction Z can protrude from the fireproof hollow wall W. Each of the four corners 23 of the peripheral wall 21 is a right angle.

In the through-hole structure having the sleeve 20 of the above configuration, the outer blocking member 16 arranged in the first hole 11a blocks the gap between the inner surface of the first hole 11a and the first outer surface 31b and the second outer surface 32b of each bending member 30 that faces the inner surface. The outer blocking member 16 arranged in the second hole 12a blocks the gap between the inner surface of the second hole 12a and the first outer surface 31b and the second outer surface 32b of each bending member 30 that faces the inner surface.

The outer blocking member 16 is compressed in the thickness direction between the inner surface of each hole 11a, 12a and the first outer surface 31b and the second outer surface 32b of each bending member 30. The compressed and deformed outer blocking member 16 returns to its original shape, deforming along and contacting the inner surface of each hole 11a, 12a and the first outer surface 31b and the second outer surface 32b of each bending member 30.

In each side wall 22 of the peripheral wall 21 formed by the reduction method, when the second plate portion 32 overlaps the outside of the first plate portion 31, a step is formed by the first outer surface 31b, the second tip edge 32c, and the second outer surface 32b, and when the first plate portion 31 overlaps the outside of the second plate portion 32, a step is formed by the second outer surface 32b, the first tip edge 31c, and the first outer surface 31b. The outer blocking member 16 deforms along the step and comes into contact with it.

As described above, steps are formed in each side wall 22, but if the joining member 50 is attached to the first inner surface 31a and the second inner surface 32a, the number of contact points between the sleeve 20 and the outer blocking member 16 is reduced, so it is preferable that the joining member 50 is attached to the first inner surface 31a and the second inner surface 32a. In addition, when the peripheral wall 21 is formed by the reduction method, the joining member 50 can be attached to the first inner surface 31a and the second inner surface 32a after the four bending members 30 are placed in the through hole 14, so that it is easy to match the size of the peripheral wall 21 to the through hole 14, and further, it is easy to determine the position where the outer blocking member 16 is compressed.

The outer blocking member 16 is strip-shaped with a smaller dimension in the penetration direction Z than the bending member 30. The outer blocking member 16 also has a thickness greater than the dimension in the plate thickness direction of the bending member 30, and in the through-hole structure, the outer blocking member 16 is compressed and deformed by an amount equal to or greater than the plate thickness of the bending member 30.

Next, a method for installing the sleeve 20 and a method for constructing the through-hole structure will be described.
First, a case where a through-hole structure is constructed while a sleeve 20 is installed using a reduction method will be described. As shown in Fig. 7, one of the four corners of the through-hole 14 is a first corner 14a, another corner adjacent to the first corner 14a in the horizontal direction is a second corner 14b, another corner adjacent to the second corner 14b in the vertical direction is a third corner 14c, and another corner adjacent to the first corner 14a and the third corner 14c is a fourth corner 14d.

Of the pair of inner surfaces of the through hole 14 that sandwich the first corner 14a, one of the inner surfaces located between the first corner 14a and the fourth corner 14d is the first inner surface 141, and the other inner surface is the second inner surface 142. Of the pair of inner surfaces of the through hole 14 that sandwich the second corner 14b, one inner surface is the second inner surface 142, and the other inner surface is the third inner surface 143. Of the pair of inner surfaces of the through hole 14 that sandwich the third corner 14c, one inner surface is the third inner surface 143, and the other inner surface is the fourth inner surface 144. And, of the pair of inner surfaces of the through hole 14 that sandwich the fourth corner 14d, one inner surface is the fourth inner surface 144, and the other inner surface is the first inner surface 141.

The four bending members 30 forming the sleeve 20 are designated as a first bending member 30a, a second bending member 30b, a third bending member 30c, and a fourth bending member 30d.
First, as shown in Figures 6 and 7, the outer blocking members 16 are arranged along the four sides of the inner surface of the first hole 11a of the first partition wall 11. Similarly, the outer blocking members 16 are arranged along the four sides of the inner surface of the second hole 12a. Then, the inner surfaces of the first hole 11a and the second hole 12a are covered with the outer blocking members 16. The thickness of each outer blocking member 16 is greater than the plate thickness of the four bending members 30.

8 and 9, the corner forming portion 33 of the first bending member 30a is placed in the through hole 14 so as to match the first corner 14a of the through hole 14. The second plate portion 32 of the first bending member 30a is placed along the first inner surface 141, and the first plate portion 31 of the first bending member 30a is placed along the second inner surface 142. At this time, the first bending member 30a is supported by the second inner surface 142 via the outer blocking member 16. In addition, a gap remains between the first tip edge 31c of the first bending member 30a and the third inner surface 143, sandwiching the outer blocking member 16.

Next, the corner forming portion 33 of the second bending member 30b is placed in the through hole 14 so as to match the second corner 14b. The second plate portion 32 of the second bending member 30b is placed along the second inner surface 142, and the first plate portion 31 of the second bending member 30b is placed along the third inner surface 143.

At this time, the tip of the first plate portion 31 of the first bending member 30a and the second plate portion 32 of the second bending member 30b are overlapped in the plate thickness direction. Then, the first inner surface 31a of the first plate portion 31 of the first bending member 30a comes into contact with the second outer surface 32b of the second plate portion 32 of the second bending member 30b.

The overlap length of the first plate portion 31 and the second plate portion 32 is adjusted to match the lengthwise dimension of the second inner surface 142. At this time, the outer blocking member 16 arranged along the second inner surface 142 is compressed in the thickness direction by more than the plate thickness of the bending member 30 between the first outer surface 31b and first tip edge 31c of the first plate portion 31 of the first bending member 30a, and the second outer surface 32b of the second plate portion 32 of the second bending member 30b, and the second inner surface 142. Then, the first plate portion 31 of the first bending member 30a and the second plate portion 32 of the second bending member 30b are joined by the joining member 50.

Next, as shown in FIG. 10, the corner forming portion 33 of the third bending member 30c is placed in the through hole 14 in alignment with the third corner 14c. The second plate portion 32 of the third bending member 30c is placed along the third inner surface 143, and the first plate portion 31 of the third bending member 30c is placed along the fourth inner surface 144. At this time, the tip portion of the first plate portion 31 of the second bending member 30b and the tip portion of the second plate portion 32 of the third bending member 30c are overlapped in the plate thickness direction. Then, the first inner surface 31a of the first plate portion 31 of the second bending member 30b and the second outer surface 32b of the second plate portion 32 of the third bending member 30c come into contact.

The overlap length of the first plate portion 31 and the second plate portion 32 is adjusted to match the lengthwise dimension of the third inner surface 143. At this time, the outer blocking member 16 arranged along the third inner surface 143 is compressed in the thickness direction by more than the plate thickness of the bending member 30 between the first outer surface 31b and first tip edge 31c of the first plate portion 31 of the second bending member 30b and the second outer surface 32b of the second plate portion 32 of the third bending member 30c, and the third inner surface 143. Then, the first plate portion 31 of the second bending member 30b and the second plate portion 32 of the third bending member 30c are joined by the joining member 50.

Next, as shown in FIG. 11, the corner forming portion 33 of the fourth bending member 30d is placed in the through hole 14 in alignment with the fourth corner 14d. The second plate portion 32 of the fourth bending member 30d is placed along the fourth inner surface 144, and the first plate portion 31 of the fourth bending member 30d is placed along the first inner surface 141. At this time, the tip portion of the first plate portion 31 of the third bending member 30c and the second plate portion 32 of the fourth bending member 30d are overlapped in the plate thickness direction. Then, the first inner surface 31a of the first plate portion 31 of the third bending member 30c and the second outer surface 32b of the second plate portion 32 of the fourth bending member 30d come into contact.

The overlap length of the first plate portion 31 and the second plate portion 32 is adjusted to match the lengthwise dimension of the fourth inner surface 144. At this time, the outer blocking member 16 arranged along the fourth inner surface 144 is compressed in the thickness direction by more than the plate thickness of the bending member 30 between the first outer surface 31b and the first tip edge 31c of the first plate portion 31 of the third bending member 30c and the second outer surface 32b of the second plate portion 32 of the fourth bending member 30d and the fourth inner surface 144. Then, the first plate portion 31 of the third bending member 30c and the second plate portion 32 of the fourth bending member 30d are joined by the joining member 50.

Furthermore, the outer blocking member 16 arranged along the first inner surface 141 is compressed in the thickness direction by more than the plate thickness of the bending member 30 between the first outer surface 31b and first tip edge 31c of the first plate portion 31 of the fourth bending member 30d and the second outer surface 32b of the second plate portion 32 of the first bending member 30a and the first inner surface 141. Then, the first plate portion 31 of the fourth bending member 30d and the second plate portion 32 of the first bending member 30a are joined by the joining member 50.

As a result, a peripheral wall 21 is formed in the through hole 14 by the four bending members 30 and the four joining members 50, and the sleeve 20 is placed in place. After that, the fluid pipe 13 is inserted into the sleeve 20 to form a through hole structure.

In the through-hole structure, the fluid pipe 13 is disposed in a through-hole 14 that penetrates the fireproof hollow wall W in the wall thickness direction and is rectangular when viewed in the wall thickness direction. In the through-hole structure, the fluid pipe 13 is surrounded by a sleeve 20 in the through-hole 14. The sleeve 20 has a rectangular frame-shaped peripheral wall 21 formed by combining four bending members 30. In each of the four side walls 22, two bending members 30 are disposed adjacent to each other in the circumferential direction of the peripheral wall 21, and the tips of the adjacent two bending members 30 overlap in the plate thickness direction of the bending members 30. In the through-hole structure, an outer blocking member 16 that is compressed and deformed in the plate thickness direction of the bending members 30 is disposed between the overlapping bending members 30 and the inner surface of the through-hole 14.

The installation method of the sleeve 20 can be said to have the following steps. Specifically, the installation method of the sleeve 20 includes a step of arranging the first to fourth bending members 30a to 30d in the through hole 14, and adjacently arranging the two bending members 30 so that the protruding directions of the first plate portion 31 and the second plate portion 32 extend in the circumferential direction of the peripheral wall 21. The installation method of the sleeve 20 also includes a step of overlapping the tip portion of the first plate portion 31 of one bending member 30 and the tip portion of the second plate portion 32 of the other bending member 30 in the plate thickness direction to form a side wall 22, thereby forming a peripheral wall 21 with four side walls 22.

When forming the sleeve 20 using the reference method, the corner forming portion 33 of the first bending member 30a is placed in the through hole 14 so as to match the first corner 14a of the through hole 14. The second plate portion 32 of the first bending member 30a is placed along the first inner surface 141, and the first plate portion 31 of the first bending member 30a is placed along the second inner surface 142. At this time, the first bending member 30a is supported by the second inner surface 142 via the outer blocking member 16.

Next, the corner forming portion 33 of the second bending member 30b is placed in the through hole 14 in alignment with the second corner 14b. The second plate portion 32 of the second bending member 30b is placed along the second inner surface 142, and the first plate portion 31 of the second bending member 30b is placed along the third inner surface 143. At this time, the first tip edge 31c of the first plate portion 31 of the first bending member 30a is butted against the second tip edge 32c of the second plate portion 32 of the second bending member 30b. The first plate portion 31 of the first bending member 30a and the second plate portion 32 of the second bending member 30b are joined by a joining member 50.

Next, the corner forming portion 33 of the third bending member 30c is placed in the through hole 14 along the third corner 14c. The second plate portion 32 of the third bending member 30c is placed along the third inner surface 143, and the first plate portion 31 of the third bending member 30c is placed along the fourth inner surface 144. At this time, the first tip edge 31c of the first plate portion 31 of the second bending member 30b is butted against the second tip edge 32c of the second plate portion 32 of the third bending member 30c. The first plate portion 31 of the second bending member 30b and the second plate portion 32 of the third bending member 30c are joined by a joining member 50.

Next, the corner forming portion 33 of the fourth bending member 30d is placed in the through hole 14 along the fourth corner 14d. The second plate portion 32 of the fourth bending member 30d is placed along the fourth inner surface 144, and the first plate portion 31 of the fourth bending member 30d is placed along the first inner surface 141.

At this time, the first tip edge 31c of the first plate portion 31 of the third bending member 30c is butted against the second tip edge 32c of the second plate portion 32 of the fourth bending member 30d. The first plate portion 31 of the third bending member 30c and the second plate portion 32 of the fourth bending member 30d are joined by the joining member 50.

Furthermore, the first tip edge 31c of the first plate portion 31 of the fourth bending member 30d is butted against the second tip edge 32c of the second plate portion 32 of the first bending member 30a. Then, the second plate portion 32 of the first bending member 30a and the first plate portion 31 of the fourth bending member 30d are joined by the joining member 50. As a result, a peripheral wall 21 is formed within the through hole 14, and the sleeve 20 is positioned.

Next, as shown in FIG. 12, the waterproof tape 60 is applied to the sleeve 20 and the fireproof hollow wall W so as to cover the outer blocking member 16, and then the sleeve 20 is positioned on the fireproof hollow wall W by the positioning tape 61. The waterproof tape 60 may be applied only to the sleeve 20 or only to the fireproof hollow wall W. The material of the waterproof tape 60 is non-breathable. By applying the waterproof tape 60 so as to cover the outer blocking member 16, the outside air is prevented from reaching the outer blocking member 16.

Then, the fluid pipe 13 is inserted through the peripheral wall 21 of the sleeve 20. When the filler 15 is filled between the inner surface of the sleeve 20 and the insulating material 17 and the fireproof member 18 on the outer periphery of the fluid pipe 13, the through-hole structure is completed.

According to the above embodiment, the following effects can be obtained.
(1-1) The peripheral wall 21 of the sleeve 20 can be formed by combining four bending members 30. Then, by adjusting the overlap length between the first plate portion 31 and the second plate portion 32 of the bending members 30 adjacent to each other in the circumferential direction of the peripheral wall 21, the dimension of the side wall 22 in the circumferential direction of the peripheral wall 21 can be adjusted, and the size of the peripheral wall 21 can be flexibly matched to the size of the through hole 14. Therefore, it is not necessary to prepare a plurality of sleeves 20 according to the size of the through hole 14. Or, it is not necessary to form the through hole 14 according to the size of the sleeve 20.

(1-2) With the first plate portion 31 and the second plate portion 32 of two adjacent bending members 30 overlapping each other, the first plate portion 31 and the second plate portion 32 are joined by a joining member 50. This makes it possible to maintain the overlap length of the first plate portion 31 and the second plate portion 32, and to maintain a state adjusted to the size of the through hole 14.

(1-3) The outer blocking member 16 is compressible and deformable. Therefore, the outer blocking member 16 is compressed in the thickness direction between the outer surface of the peripheral wall 21 of the sleeve 20 and the inner surface of the through hole 14 by more than the plate thickness of the bending member 30, and is pressed against the outer surface of the peripheral wall 21 and the inner surface of the through hole 14. Therefore, the outer blocking member 16 can block the gap between the outer surface of the peripheral wall 21 and the inner surface of the through hole 14.

In particular, when the peripheral wall 21 is formed by the reduction method, a step is formed at the overlapping portion of the first plate portion 31 and the second plate portion 32, but the outer blocking member 16 deforms to follow the step, so that the outer blocking member 16 can close the gap between the outer surface of the peripheral wall 21 and the inner surface of the through hole 14. Furthermore, even if the corner of the through hole 14 is not a right angle but has a rounded shape, or the inner surface of the through hole 14 has an uneven surface, the outer blocking member 16 deforms to follow the shape of the through hole 14, so that the gap between the outer surface of the peripheral wall 21 and the inner surface of the through hole 14 can be closed.

(1-4) When the waterproof tape 60 is applied so as to cover the outer blocking member 16, the waterproof tape 60 is non-breathable, so that outside air is less likely to reach the outer blocking member 16. This prevents the outer blocking member 16 from becoming damp due to water vapor contained in the outside air. In addition, the waterproof tape 60 prevents the outer blocking member 16 from being exposed to the front side of the fireproof hollow wall W, so deterioration of the outer blocking member 16 can be prevented.

Second Embodiment
Next, a second embodiment that embodies the sleeve, the through-hole structure, and the installation method of the sleeve will be described with reference to Figures 13 and 14. Note that the second embodiment is configured by simply changing the sleeve 20 of the first embodiment, and therefore detailed descriptions of similar parts will be omitted. Also, the circumferential direction, the through-direction Z, the first direction H1, the second direction H2, and the width direction H3 defined in the first embodiment are the same in the second embodiment.

As shown in Figures 13 and 14, the sleeve 70 has a rectangular frame-shaped peripheral wall 71. The peripheral wall 71 is composed of four bending members 30 as peripheral wall constituents and four straight portion forming bodies 80 as peripheral wall constituents.

The straight portion forming body 80 is a rectangular plate. The straight portion forming body 80 has a rectangular inner surface 81a on one side in the plate thickness direction, and a rectangular outer surface 81b on the other side in the plate thickness direction. When the straight portion forming body 80 is viewed in the plate thickness direction, the direction in which the short sides of the inner surface 81a and the outer surface 81b extend is the fourth direction H4. When the straight portion forming body 80 is used to form the sleeve 70, the direction in which the long sides of the inner surface 81a and the outer surface 81b of the straight portion forming body 80 extend is the same as the direction in which the long sides of the second inner surface 32a and the second outer surface 32b of the second plate portion 32 extend. In the straight portion forming body 80, the direction in which the long sides of the inner surface 81a and the outer surface 81b extend is the width direction H3. The dimension of the straight portion forming body 80 in the width direction H3 is constant in the fourth direction H4. Therefore, the straight portion forming body 80 has a constant width that does not change along the fourth direction H4.

The peripheral wall 71 has four side walls 72 and four corners 73. The peripheral wall 71 is formed by combining four bending members 30 and four straight portion forming bodies 80. Specifically, the peripheral wall 71 is formed by combining and arranging the four bending members 30 and the four straight portion forming bodies 80 to form a rectangular frame. The four corners 73 of the peripheral wall 71 are formed by the corner forming portions 33 of the four bending members 30.

Each of the four side walls 72 is formed by combining a tip of the first plate portion 31 of one of the two bending members 30 located apart in the circumferential direction of the peripheral wall 71, a tip of the second plate portion 32 of the other bending member 30, and a straight portion forming body 80 adjacent to the tip of the first plate portion 31 and the tip of the second plate portion 32 so as to overlap both tips in the plate thickness direction so as to connect them. In each side wall 72, the tip of the first plate portion 31 overlaps one end of the straight portion forming body 80 in the fourth direction H4, and the tip of the second plate portion 32 overlaps the other end of the straight portion forming body 80 in the fourth direction H4.

When the peripheral wall 71 is formed by combining the bending member 30 and the straight portion forming body 80, the greater the overlap amount between the first plate portion 31 and the second plate portion 32 relative to the straight portion forming body 80 along the circumferential direction of the peripheral wall 71, the smaller the dimension of the side wall 72 in the circumferential direction of the peripheral wall 71 can be. Conversely, the less the overlap amount between the first plate portion 31 and the second plate portion 32 relative to the straight portion forming body 80 along the circumferential direction of the peripheral wall 71, the larger the dimension of the side wall 72 in the circumferential direction of the peripheral wall 71 can be. In addition, the internal space K of the peripheral wall 71 can be expanded or contracted by increasing or decreasing the overlap length between the first plate portion 31 and the second plate portion 32 in the peripheral wall 71 along the circumferential direction of the peripheral wall 21.

In each of the four side walls 72 of the peripheral wall 71, the tip of the first plate portion 31 and the straight portion forming body 80, and the tip of the second plate portion 32 and the straight portion forming body 80 are joined by a joining member 50. It is preferable to unify which of the first plate portion 31 and the second plate portion 32 and the straight portion forming body 80 is on the outside in the overlapping direction in each of the four side walls 72. However, it is optional as to which of the first plate portion 31 and the second plate portion 32 and the straight portion forming body 80 is on the outside in the overlapping direction.

On each side wall 72, two joints are formed by the joint members 50. Therefore, eight joints are formed by the joint members 50 on the peripheral wall 71. By joining the four bending members 30 and the four straight portion forming bodies 80 with the joint members 50, the four bending members 30 and the four straight portion forming bodies 80 are assembled together and the shape of the peripheral wall 71 is maintained. The joint members 50 also serve as maintaining members that maintain the shape of the sleeve 70. The sleeve 70 is composed of the peripheral wall 71, which is formed from the four bending members 30 and the four straight portion forming bodies 80, and the joint members 50.

Therefore, according to the second embodiment, in addition to the effects described in the first embodiment, the following effects can be obtained.
(2-1) Each of the four side walls 72 of the peripheral wall 71 is formed from a first plate portion 31, a second plate portion 32, and a straight portion forming body 80. Even if two bending members 30 adjacent to each other in the circumferential direction of the peripheral wall 21 are spaced apart in the circumferential direction, the straight portion forming body 80 prevents the side walls 72 from being interrupted between the first plate portion 31 and the second plate portion 32, and allows each side wall 72 to be extended in the circumferential direction. Therefore, the internal space K of the peripheral wall 71 can be expanded.

Third Embodiment
Next, a third embodiment that embodies the sleeve, the through-hole structure, and the sleeve installation method will be described with reference to Figures 15 to 17. Note that the third embodiment is configured by simply changing the sleeve 20 and the fireproof hollow wall W of the first embodiment, and therefore detailed descriptions of similar parts will be omitted. Also, the circumferential direction, the penetration direction Z, the first direction H1, the second direction H2, and the width direction H3 defined in the first embodiment are the same in the third embodiment.

As shown in FIG. 15(a), the sleeve 82 of the third embodiment surrounds a penetrating member (not shown) in a rectangular through hole Fa that penetrates a floor plate F as a partition wall. Examples of the penetrating member that penetrates the floor plate F include control cables, coaxial cables, and optical cables as wiring, and synthetic resin flexible electric conduits, steel electric conduits, and fluid pipes as piping materials. The sleeve 82 is used as a form for forming the through hole Fa when forming the through hole Fa in the floor plate F. After the through hole Fa is formed in the floor plate F by the sleeve 82, the sleeve 82 remains installed in the floor plate F.

As shown in FIG. 17, the through hole Fa is rectangular in plan view when the floor plate F is viewed from above. A rectangular frame-shaped sleeve 82 is disposed within the through hole Fa. A penetrating member (not shown) is inserted into the sleeve 82, so that the penetrating member (not shown) penetrates the through hole Fa of the floor plate F.

The sleeve 82 has a peripheral wall 83 in the shape of a rectangular frame. The peripheral wall 83 has flanges 84 at both ends in the penetration direction Z. The peripheral wall 83 is composed of two long side walls 83a that face each other across the internal space K, and two short side walls 83b that face each other across the internal space K. Thus, the peripheral wall 83 has four side walls, that is, two long side walls 83a and two short side walls 83b. The flanges 84 are in the shape of a rectangular frame that protrudes outward from the sleeve 82.

As shown in Figures 15(a), 15(b) and 16, the peripheral wall 83 is composed of two outer polymers 85 as bending members of the peripheral wall structure, two inner polymers 90 as bending members, and an outer straight portion forming body 100 and an inner straight portion forming body 105 as peripheral wall structures.

The outer polymer 85 has a first plate portion 86 in the shape of a rectangular plate, a second plate portion 87 perpendicular to the first plate portion 86, a corner forming portion 88 located at the intersection of the first plate portion 86 and the second plate portion 87, and an outer flange forming portion 89 as a flange forming portion. The outer polymer 85 is made of a metal plate that is L-shaped when viewed along the penetration direction Z and has a constant width in the penetration direction Z. The outer polymer 85 also has the corner forming portion 88 and two plate portions that protrude from the corner forming portion 88 perpendicularly to each other in the protruding direction and have a constant width in the protruding direction, one of the plate portions being the first plate portion 86 and the other plate portion being the second plate portion 87.

The first plate portion 86 has a rectangular first inner surface 86a on one side in the plate thickness direction, and a rectangular first outer surface 86b on the other side in the plate thickness direction. The second plate portion 87 has a rectangular second inner surface 87a on one side in the plate thickness direction, and a rectangular second outer surface 87b on the other side in the plate thickness direction.

The first inner surface 86a of the first plate portion 86 is perpendicular to the second inner surface 87a of the second plate portion 87. The first outer surface 86b of the first plate portion 86 is perpendicular to the second outer surface 87b of the second plate portion 87. The first plate portion 86 has a constant width that does not change along the first direction H1, which is the direction of protrusion from the corner forming portion 88. The second plate portion 87 has a constant width that does not change along the second direction H2, which is the direction of protrusion from the corner forming portion 88. The dimension of the first plate portion 86 along the first direction H1 is different from the dimension of the second plate portion 87 along the second direction H2. The dimension of the first plate portion 86 along the first direction H1 is larger than the dimension of the second plate portion 87 along the second direction H2.

The outer flange forming portions 89 are located at both ends of the outer polymer 85 in the penetration direction Z. The outer flange forming portions 89 are provided over the entire direction in which the first plate portion 86 protrudes from the corner forming portion 88, and over the entire direction in which the second plate portion 87 protrudes from the corner forming portion 88. In other words, the outer flange forming portions 89 are provided over the entire L-shape of the outer polymer 85. The outer flange forming portions 89 are composed of a base end flange portion 89a near the first plate portion 86 and the second plate portion 87, and a tip end flange portion 89b protruding from the base end flange portion 89a.

The base end flange portion 89a and the tip flange portion 89b are offset in the penetration direction Z. The base end flange portion 89a is located closer to the first plate portion 86 and the second plate portion 87 than the tip flange portion 89b. Therefore, the outer flange forming portion 89 is formed in a stepped shape by the base end flange portion 89a and the tip flange portion 89b. In the outer flange forming portion 89, the base end flange portion 89a can be said to be located at a position recessed from the tip flange portion 89b in the penetration direction Z.

Each of the two outer flange forming portions 89 has a surface 89c of the base end flange portion 89a located at both ends of the outer polymer 85 in the penetration direction Z, and a back surface 89d on the opposite side of the surface 89c in the plate thickness direction of the outer flange forming portion 89.

The outer polymer 85 has an outer polymerization step 85a in the center in the penetration direction Z. The outer polymerization step 85a is provided over the entire direction in which the first plate portion 86 protrudes from the corner forming portion 88, and over the entire direction in which the second plate portion 87 protrudes from the corner forming portion 88. In other words, the outer polymerization step 85a is provided over the entire L-shape of the outer polymer 85.

The outer overlapping step 85a is formed by bulging the metal plate toward the first outer surface 86b of the first plate portion 86 and toward the second outer surface 87b of the second plate portion 87. The outer overlapping step 85a is recessed from the first inner surface 86a and the second inner surface 87a. The opening width of the outer overlapping step 85a along the penetration direction Z is constant throughout the entire L-shape of the outer polymer 85.

The outer overlapping step 85a has a plurality of holes 85b that penetrate the outer overlapping step 85a in the plate thickness direction. The holes 85b are provided at equal intervals throughout the entire L-shape of the outer overlapping step 85a.

The inner polymer 90 has a first plate portion 91 in the shape of a rectangular plate, a second plate portion 92 perpendicular to the first plate portion 91, a corner forming portion 93 located at the intersection of the first plate portion 91 and the second plate portion 92, and an inner flange forming portion 94 as a flange forming portion. The inner polymer 90 is made of a metal plate that is L-shaped when viewed along the penetration direction Z and has a constant width in the penetration direction Z. The inner polymer 90 also has the corner forming portion 93 and two plate portions that protrude from the corner forming portion 93 perpendicularly to each other in the protruding direction and have a constant width in the protruding direction, one of the plate portions being the first plate portion 91 and the other plate portion being the second plate portion 92.

The first plate portion 91 has a rectangular first inner surface 91a on one side in the plate thickness direction, and a rectangular first outer surface 91b on the other side in the plate thickness direction. The second plate portion 92 has a rectangular second inner surface 92a on one side in the plate thickness direction, and a rectangular second outer surface 92b on the other side in the plate thickness direction.

The first inner surface 91a of the first plate portion 91 is perpendicular to the second inner surface 92a of the second plate portion 92. The first outer surface 91b of the first plate portion 91 is perpendicular to the second outer surface 92b of the second plate portion 92. The first plate portion 91 has a constant width that does not change along the first direction H1, which is the direction of protrusion from the corner forming portion 93. The second plate portion 92 has a constant width that does not change along the second direction H2, which is the direction of protrusion from the corner forming portion 93. The dimension of the first plate portion 91 along the first direction H1 is different from the dimension of the second plate portion 92 along the second direction H2. The dimension of the first plate portion 91 along the first direction H1 is larger than the dimension of the second plate portion 92 along the second direction H2.

The inner flange forming portions 94 are located at both end edges of the inner polymer 90 in the penetration direction Z. The inner flange forming portions 94 are provided over the entire direction in which the first plate portion 91 protrudes from the corner forming portion 93, and over the entire direction in which the second plate portion 92 protrudes from the corner forming portion 93. In other words, the inner flange forming portions 94 are provided over the entire L-shape of the inner polymer 90.

The inner flange forming portion 94 has a surface 94a located at both ends in the penetration direction Z, and a back surface 94b located opposite the surface 94a in the plate thickness direction of the inner flange forming portion 94.
In the inner polymer 90, the dimension between the two back surfaces 94b in the penetration direction Z is slightly larger than the dimension between the two front surfaces 89c in the outer polymer 85. Therefore, the inner polymer 90 and the outer polymer 85 can be combined with each other by facing the back surface 94b of the inner flange forming portion 94 of the inner polymer 90 to the front surface 89c of the base end flange portion 89a of the outer polymer 85.

The inner polymer 90 has an inner polymerization step 90a in the center in the penetration direction Z. The inner polymerization step 90a is provided over the entire direction in which the first plate portion 91 protrudes from the corner forming portion 93, and over the entire direction in which the second plate portion 92 protrudes from the corner forming portion 93. In other words, the inner polymerization step 90a is provided over the entire L-shape of the inner polymer 90.

The inner polymerization step 90a is formed by bulging the metal plate toward the first outer surface 91b of the first plate portion 91 and toward the second outer surface 92b of the second plate portion 92. The thickness of the inner polymerization step 90a along the penetration direction Z is constant throughout the L-shape of the inner polymer 90. The thickness of the inner polymerization step 90a along the penetration direction Z is smaller than the opening width of the outer polymerization step 85a along the penetration direction Z. The inner polymerization step 90a has a plurality of holes 90b that penetrate the inner polymerization step 90a in the plate thickness direction. The plurality of holes 90b are provided at equal intervals throughout the L-shape of the inner polymerization step 90a.

The outer straight section forming body 100 has an outer main body portion 101 in the shape of a rectangular plate, outer flange forming portions 102 located at both end edges of the outer main body portion 101 in the penetration direction Z, and an outer bulge portion 103 located in the center of the outer main body portion 101 in the penetration direction Z.

The outer main body portion 101 has a rectangular inner surface 101a on one side in the plate thickness direction, and a rectangular outer surface 101b on the other side in the plate thickness direction. The outer flange forming portions 102 are located at both end edges of the outer main body portion 101 in the penetration direction Z. The outer flange forming portions 102 are provided over the entire both end edges of the outer main body portion 101. The outer flange forming portions 102 are composed of a base end flange portion 102a close to the outer main body portion 101, and a tip flange portion 102b extending from the base end flange portion 102a.

The base end flange portion 102a and the tip flange portion 102b are offset in the penetration direction Z. The base end flange portion 102a is located closer to the outer main body portion 101 than the tip flange portion 102b. Therefore, the outer flange forming portion 102 is formed in a stepped shape by the base end flange portion 102a and the tip flange portion 102b. In the outer flange forming portion 102, the base end flange portion 102a can be said to be located at a position recessed from the tip flange portion 102b in the penetration direction Z.

Each of the two outer flange forming portions 102 has a surface 102c of the base end flange portion 102a located at both ends of the outer straight portion forming body 100 in the penetration direction Z, and a back surface 102d on the opposite side of the surface 102c in the plate thickness direction of the outer flange forming portion 102.

Here, in the inner polymer 90, the dimension in the penetration direction Z between the two back surfaces 94b is slightly larger than the dimension in the penetration direction Z between the two front surfaces 102c in the outer straight section forming body 100. Therefore, the inner polymer 90 and the outer straight section forming body 100 can be combined by facing the back surface 94b of the inner flange forming portion 94 of the inner polymer 90 to the front surface 102c of the base end flange portion 102a of the outer straight section forming body 100.

The outer bulge 103 is formed by bulging a metal plate toward the outer surface 101b of the outer main body 101. The opening width of the outer bulge 103 along the penetration direction Z is constant throughout the entire short side of the outer main body 101.

The inner straight section forming body 105 has an inner main body portion 106 in the shape of a rectangular plate, inner flange forming portions 107 located at both end edges of the inner main body portion 106 in the penetration direction Z, and an inner bulge portion 108 located in the center of the inner main body portion 106 in the penetration direction Z.

The inner main body portion 106 has a rectangular inner surface 106a on one side in the plate thickness direction, and a rectangular outer surface 106b on the other side in the plate thickness direction. The inner flange forming portions 107 are located at both end edges of the inner main body portion 106 in the penetration direction Z. The inner flange forming portions 107 are provided over the entire both end edges of the inner main body portion 106. Each of the two inner flange forming portions 107 has a surface 107c located at both ends of the inner straight portion forming body 105 in the penetration direction Z, and a back surface 107d on the opposite side of the surface 107c in the plate thickness direction of the inner flange forming portion 107.

Here, in the inner straight portion forming body 105, the dimension in the penetration direction Z between the two back surfaces 107d is slightly larger than the dimension in the penetration direction Z between the two front surfaces 89c in the outer polymer 85. Therefore, the inner straight portion forming body 105 and the outer polymer 85 can be combined by facing the back surface 107d of the inner flange forming portion 107 of the inner straight portion forming body 105 to the front surface 89c of the base end flange portion 89a of the outer polymer 85.

The inner bulge 108 is formed by bulging the metal plate toward the outer surface 106b of the inner main body 106. The opening width of the inner bulge 108 is constant over the entire width of the inner main body 106.

Next, a method for installing the sleeve 82 and a method for constructing the through-hole structure will be described.
As shown in Figure 17, the sleeve 82 of this embodiment is configured by integrating two outer polymers 85, two inner polymers 90, one outer straight portion forming body 100, and one inner straight portion forming body 105 in advance and installing them in the through hole Fa.

The two outer polymers 85 are arranged so that the two first plate portions 86 are aligned in the circumferential direction of the peripheral wall 83. In this case, the first plate portions 86 of the two outer polymers 85 may be separated from each other in the circumferential direction of the peripheral wall 83, or their tips may be in contact with each other.

The inner straight section forming body 105 is placed on the first inner surface 86a side of the first plate portion 86 of the two outer polymers 85, and the back surface 107d of the inner flange forming portion 107 of the inner straight section forming body 105 faces the surface 89c of the outer flange forming portion 89 of each outer polymer 85. At this time, the tip portions of the two outer polymers 85 and the tip portion of the inner straight section forming body 105 are polymerized in the plate thickness direction. The polymerized outer polymer 85 and inner straight section forming body 105 are polymerized with the outer polymerization step portion 85a and the inner bulge portion 108 fitting together.

Then, the outer surface 106b of the inner main body portion 106 of the inner straight portion forming body 105 faces the first inner surface 86a of the two outer polymers 85. As a result, one long side wall 83a of the peripheral wall 83 is formed by the first plate portions 86 of the two outer polymers 85 and the inner straight portion forming body 105.

The two inner polymers 90 are arranged so that the two first plate portions 91 are aligned in the circumferential direction of the peripheral wall 83. In this case, the first plate portions 91 of the two inner polymers 90 may be separated from each other in the circumferential direction of the peripheral wall 83, or their tips may be in contact with each other.

The outer straight section forming body 100 is placed on the first outer surface 91b side of the two inner polymers 90, and the outer flange forming portion 102 of the outer straight section forming body 100 faces the inner flange forming portion 94 of the two inner polymers 90. Then, the surface 102c of the outer flange forming portion 102 of the outer straight section forming body 100 faces the back surface 94b of the inner flange forming portion 94 of each inner polymer 90. At this time, the tip portions of the two inner polymers 90 and the tip portion of the outer straight section forming body 100 are polymerized in the plate thickness direction. The polymerized inner polymer 90 and outer straight section forming body 100 are polymerized with the inner polymerization step portion 90a and the outer bulge portion 103 fitting together.

Then, the inner surface 101a of the outer main body portion 101 of the outer straight portion forming body 100 faces the first outer surface 91b of the two inner polymers 90. As a result, one long side wall 83a of the peripheral wall 83 is formed by the first plate portions 91 of the two inner polymers 90 and the outer straight portion forming body 100.

The second plate portion 92 of the inner polymer 90 is disposed on each of the inner sides of the second plate portions 87 of the two outer polymers 85. The surface 89c of the outer flange forming portion 89 of each outer polymer 85 faces the back surface 94b of the inner flange forming portion 94 of the inner polymer 90. At this time, the tip portion of the second plate portion 87 of the outer polymer 85 and the tip portion of the second plate portion 92 of the inner polymer 90 are polymerized in the plate thickness direction. The polymerized outer polymer 85 and inner polymer 90 are polymerized with the outer polymerization step portion 85a and the inner polymerization step portion 90a fitting together.

Then, the second outer surface 92b of the second plate portion 92 of the inner polymer 90 faces the second inner surface 87a of the second plate portion 87 of the outer polymer 85. As a result, the second plate portion 87 of the outer polymer 85 and the second plate portion 92 of the inner polymer 90 form two short side walls 83b of the peripheral wall 83.

The peripheral wall 83 has rectangular frame-shaped flanges 84 that extend outward from both ends of the peripheral wall 83 in the penetration direction Z. The flanges 84 are formed in a rectangular frame shape by combining an outer flange forming portion 89 of the two outer polymers 85, an inner flange forming portion 94 of the two inner polymers 90, an outer flange forming portion 102 of the outer straight portion forming body 100, and an inner flange forming portion 107 of the inner straight portion forming body 105.

Two of the four corners of the peripheral wall 83 are formed by corner forming portions 88 of the outer polymer 85 , and the remaining two are formed by corner forming portions 93 of the inner polymer 90 .
The outer flange forming portion 89 of the outer polymer 85 adjacent in the circumferential direction of the peripheral wall 83 and the inner flange forming portion 107 of the inner straight portion forming body 105 are overlapped in the plate thickness direction. Also, the inner flange forming portion 94 of the inner polymer 90 adjacent in the circumferential direction of the peripheral wall 83 and the outer flange forming portion 102 of the outer straight portion forming body 100 are overlapped in the plate thickness direction. Furthermore, the outer flange forming portion 89 of the outer polymer 85 adjacent in the circumferential direction of the peripheral wall 83 and the inner flange forming portion 94 of the inner polymer 90 are overlapped in the plate thickness direction.

The peripheral wall 83 has a pair of long side walls 83a facing each other and a pair of short side walls 83b facing each other. In one of the pair of two long side walls 83a, two bending members positioned apart in the circumferential direction are outer polymers 85. The two outer polymers 85 are polymerized on the outside of the rectangular frame with respect to the inner straight portion forming body 105, which serves as a first straight portion forming body connecting the outer polymers 85. In addition, the outer flange forming portion 89 of the two outer polymers 85 is polymerized on the other edge side in the penetration direction Z with respect to the inner flange forming portion 107 of the inner straight portion forming body 105.

In the other long side wall 83a of one set of two long side walls 83a, the two bending members located circumferentially apart are inner polymers 90. The two inner polymers 90 are polymerized on the inside of the rectangular frame with respect to the outer straight section forming body 100, which serves as a second straight section forming body connecting the inner polymers 90. In addition, the inner flange forming portion 94 of the two inner polymers 90 is polymerized on one edge side in the penetration direction Z with respect to the outer flange forming portion 102 of the outer straight section forming body 100.

Each of the two short side walls 83b is composed of an outer polymer 85 and an inner polymer 90, which are two bending members of one set that face each other through an internal space K. In each of the two short side walls 83b of the other set, the tip of the second plate portion 87 of the outer polymer 85 is polymerized so as to be located outside the tip of the second plate portion 92 of the inner polymer 90.

The larger the amount of each inner polymer 90 polymerized to the outer straight portion forming body 100 and the amount of each outer polymer 85 polymerized to the inner straight portion forming body 105 in the circumferential direction of the peripheral wall 83 in each long side wall 83a, the smaller the dimension of the long side wall 83a in the circumferential direction of the peripheral wall 83. Conversely, the smaller the amount of each inner polymer 90 polymerized to the outer straight portion forming body 100 and the amount of each outer polymer 85 polymerized to the inner straight portion forming body 105 in the circumferential direction of the peripheral wall 83, the larger the dimension of the long side wall 83a in the circumferential direction of the peripheral wall 83.

When adjusting the overlap length of the long side wall 83a, the overlap length in the circumferential direction of the peripheral wall 83 is guided by the fit between the overlapped outer overlap step 85a and the inner bulge 108, and the fit between the inner overlap step 90a and the outer bulge 103.

Furthermore, in the pair of short side walls 83b, the greater the amount of overlap between the second plate portion 87 of the outer polymer 85 and the second plate portion 92 of the inner polymer 90 along the circumferential direction of the peripheral wall 83, the smaller the dimension of the short side wall 83b in the circumferential direction of the peripheral wall 83 can be. Conversely, the less the amount of overlap between the second plate portion 87 of the outer polymer 85 and the second plate portion 92 of the inner polymer 90 along the circumferential direction of the peripheral wall 83, the larger the dimension of the short side wall 83b in the circumferential direction of the peripheral wall 83 can be.

When adjusting the overlap length of the short side wall 83b, the overlapping outer overlap step 85a and the inner overlap step 90a fit together to guide the adjustment of the overlap length in the circumferential direction of the peripheral wall 83. By increasing or decreasing the amount of overlap in the long side wall 83a and the short side wall 83b of the peripheral wall 83 along the circumferential direction of the peripheral wall 83, the internal space K of the peripheral wall 83 can be expanded or contracted.

Although not shown, in the long side wall 83a of the peripheral wall 83, the outer polymer 85 and the inner straight portion forming body 105, and the inner polymer 90 and the outer straight portion forming body 100 are joined by a joining member similar to the joining member 50 shown in the first embodiment, and in the short side wall 83b, the outer polymer 85 and the inner polymer 90 are joined by a joining member.

On each long side wall 83a, two joints are formed by the joining member. On each short side wall 83b, one joint is formed by the joining member. Therefore, six joints are formed by the joining members on the peripheral wall 83. The two outer polymers 85, the two inner polymers 90, the outer straight portion forming body 100, and the inner straight portion forming body 105 are joined by the joining members, so that they are assembled together and the shape of the peripheral wall 83 is maintained. The joining members also act as maintaining members that maintain the shape of the sleeve 82.

The sleeve 82 is composed of two outer polymers 85, two inner polymers 90, an outer straight section forming body 100, an inner straight section forming body 105, and a joining member. When the sleeve 82 is used as a form for forming the through hole Fa, the flange 84 is engaged around the through hole Fa in the floor plate F.

In addition, the joining member may be a bolt or a tapping screw instead of aluminum tape. In this case, the bolt or tapping screw may be inserted into the hole 85b formed in the outer overlapping step 85a of the outer polymer 85, and the bolt or tapping screw may be screwed into the inner bulge 108 of the overlapping inner straight portion forming body 105 to join the outer polymer 85 and the inner straight portion forming body 105. Therefore, the hole 85b is a hole that allows the bolt or tapping screw to be screwed back and forth.

Similarly, a bolt or tapping screw may be inserted into a hole 90b formed in the inner polymer 90's inner polymerization step 90a, and the bolt or tapping screw may be screwed into the outer bulge 103 of the outer straight section forming body 100 to be joined to the inner polymer 90 and the outer straight section forming body 100. Therefore, the hole 90b is a hole that allows the bolt or tapping screw to be screwed forward and backward. Also, a bolt or tapping screw may be inserted into the hole 85b of the outer polymer 85 or the hole 90b of the inner polymer 90, and the bolt or tapping screw may be screwed into the inner polymerization step 90a or the outer polymerization step 85a to be joined to the outer polymer 85 and the inner polymer 90.

Therefore, according to the third embodiment, in addition to the effects (1-1) to (1-4) described in the first embodiment and the effect (2-1) described in the second embodiment, the following effect can be obtained.
(3-1) The peripheral wall 83 has flanges 84 at both end edges in the penetration direction Z. In the flange 84, an outer flange forming portion 89 of the outer polymer 85 and an inner flange forming portion 107 of the inner straight portion forming body 105 overlap in the plate thickness direction. At this time, the inner flange forming portion 107 overlaps with a base end flange portion 89a that is recessed in the penetration direction Z more than a tip flange portion 89b of the outer flange forming portion 89. Therefore, the outer flange forming portion 89 and the inner flange forming portion 107 can be made flush with each other.

In addition, in the flange 84, the outer flange forming portion 102 of the outer straight portion forming body 100 and the inner flange forming portion 94 of the inner polymer 90 overlap in the plate thickness direction. At this time, the inner flange forming portion 94 overlaps with the base end flange portion 102a, which is recessed in the penetration direction Z more than the tip flange portion 102b of the outer flange forming portion 102. Therefore, the outer flange forming portion 102 and the inner flange forming portion 94 can be made flush.

In addition, in the flange 84, the outer flange forming portion 89 of the outer polymer 85 and the inner flange forming portion 94 of the inner polymer 90 overlap in the plate thickness direction. At this time, the inner flange forming portion 94 overlaps with the base end flange portion 89a, which is recessed in the penetration direction Z more than the tip flange portion 89b of the outer flange forming portion 89. Therefore, the outer flange forming portion 89 and the inner flange forming portion 94 can be made flush.

In addition, the overlap between the outer flange forming portion 89 and the inner flange forming portion 107, the overlap between the outer flange forming portion 102 and the inner flange forming portion 94, and the overlap between the outer flange forming portion 89 and the inner flange forming portion 94 can eliminate gaps between adjacent peripheral wall components. Therefore, when forming the floor plate F, the flange 84 is engaged around the through hole Fa in the floor plate F, but due to the overlap of the flange forming portions, no gap is formed between the through hole Fa and the peripheral wall 83, and the intrusion of concrete into the sleeve 82 can be suppressed.

(3-2) When adjusting the overlap length of the long side wall 83a, the overlapped outer overlap step 85a fits into the inner bulge 108, and the adjustment of the overlap length in the circumferential direction of the peripheral wall 83 is guided by the slide. Therefore, when adjusting the overlap length, it is possible to prevent the outer polymer 85 and the inner straight section forming body 105 from shifting in the penetration direction Z.

Similarly, when adjusting the overlap length of the long side wall 83a, the fit between the overlapped inner overlap step portion 90a and the outer bulge portion 103 guides the adjustment of the overlap length in the circumferential direction of the peripheral wall 83 by sliding. Therefore, when adjusting the overlap length, it is possible to prevent the inner polymer 90 and the outer straight portion forming body 100 from shifting in the penetration direction Z.

When adjusting the overlap length of the short side wall 83b, the overlap length in the circumferential direction of the peripheral wall 83 is guided by the fit between the overlapped outer overlap step 85a and inner overlap step 90a. Therefore, when adjusting the overlap length, it is possible to prevent the outer polymer 85 and the inner polymer 90 from shifting in the penetration direction Z.

As a result of the above, the overlap length of the peripheral wall 83 in the circumferential direction can be easily adjusted overall.
This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

○ In the third embodiment, the peripheral wall 83 of the sleeve 82 may be composed of two outer polymers 85 and two inner polymers 90. In other words, the peripheral wall 83 of the sleeve 82 may be composed of only two outer polymers 85 and two inner polymers 90 as four bending members. The peripheral wall 83 also has flanges 84 at both ends in the penetration direction Z. This form of the sleeve 82 is formed by removing the outer straight portion forming body 100 and the inner straight portion forming body 105 from the peripheral wall 83 of the third embodiment and forming the peripheral wall 83 from two outer polymers 85 and two inner polymers 90.

As shown in FIG. 18, each of the two long side walls 83 a in one set and each of the two short side walls 83 b in the other set are constructed with an outer polymer 85 and an inner polymer 90 .
At this time, in a pair of long side walls 83a, the outer polymer 85 and the inner polymer 90 face each other between the two long side walls 83a via an internal space K, and in a pair of short side walls 83b, the outer polymer 85 and the inner polymer 90 face each other between the two short side walls 83b via an internal space K. In other words, the two outer polymers 85 are located on a diagonal line of the peripheral wall 83, and the two inner polymers 90 are located on a diagonal line of the peripheral wall 83.

Therefore, for one outer polymer 85, the first plate portion 91 of one inner polymer 90 is disposed inside the first plate portion 86, and the second plate portion 92 of the other inner polymer 90 is disposed inside the second plate portion 87. Thus, the two outer polymers 85 are disposed in a position where one outer polymer 85 is inverted upside down with respect to the other outer polymer 85, and the two inner polymers 90 are disposed in a position where one inner polymer 90 is inverted upside down with respect to the other inner polymer 90.

In the flange 84, the order of stacking in the thickness direction of the flange forming portions adjacent in the circumferential direction is alternated in the circumferential direction. In other words, in the flange 84, the order of stacking in the thickness direction of the outer flange forming portion 89 of the outer polymer 85 and the inner flange forming portion 94 of the inner polymer 90 is alternated in the circumferential direction.

Two of the four corners of the peripheral wall 83 are formed by corner forming portions 88 of the outer polymer 85 , and the remaining two are formed by corner forming portions 93 of the inner polymer 90 .
By configuring in this manner, it is possible to provide a sleeve 82 having a smaller internal space K than the sleeve 82 of the third embodiment.

In addition, by adding an outer straight portion forming body 100 and an inner straight portion forming body 105 to the peripheral wall 83 of the sleeve 82 shown in FIG. 18, it is possible to return to the sleeve 82 of the third embodiment and to make a sleeve 82 with an expanded internal space K.

The method of installing the sleeve 20 in the first embodiment may be modified as follows.
The outer blocking member 16 is disposed along the first inner surface 141 and the second inner surface 142. Next, as shown in Fig. 19, the tip of the second plate portion 32 in the first bending member 30a and the tip of the first plate portion 31 in the fourth bending member 30d are overlapped in the plate thickness direction, and the adjacent first plate portion 31 and second plate portion 32 are joined by a joining member 50. When the first bending member 30a and the fourth bending member 30d are joined, a first assembly 51 is formed. This first assembly 51 includes one side wall 22, the first plate portion 31 protruding from one end of the side wall 22, and the second plate portion 32 protruding from the other end of the side wall 22.

The length of the side wall 22 formed in the first assembly 51 is adjusted by adjusting the overlapping length of the first plate portion 31 and the second plate portion 32 so that the length fits one of the four inner surfaces of the through hole 14 .
Then, the first assembly 51 is inserted into the through hole 14. At this time, the side wall 22 of the first assembly 51 is aligned along the surface of the inner surface of the outer blocking member 16 arranged in the through hole 14 that is aligned along the first inner surface 141. In addition, the first plate portion 31 is aligned along the second inner surface 142, and the second plate portion 32 of the fourth inner surface 144 is aligned along the second inner surface 142.

Next, the tip of the first plate portion 31 in the second bending member 30b and the tip of the second plate portion 32 in the third bending member 30c are overlapped in the plate thickness direction, and the adjacent first plate portion 31 and second plate portion 32 are joined by a joining member 50. When the second bending member 30b and the third bending member 30c are joined, a second assembly 52 is formed. This second assembly 52 includes one side wall 22, a first plate portion 31 protruding from one end of the side wall 22, and a second plate portion 32 protruding from the other end of the side wall 22.

The length of the side wall 22 formed in the second assembly 52 is adjusted by adjusting the overlapping length of the first plate portion 31 and the second plate portion 32 so that the length fits one of the four inner surfaces of the through hole 14 .
Then, the second assembly 52 is inserted into the through hole 14. At this time, the side wall 22 of the second assembly 52 is aligned along the surface of the inner surface of the outer blocking member 16 arranged in the through hole 14 that is aligned along the third inner surface 143, the second plate portion 32 is aligned along the second inner surface 142, and the first plate portion 31 is aligned along the fourth inner surface 144.

The first plate portion 31 of the first assembly 51 and the second plate portion 32 of the second assembly 52 are overlapped in the plate thickness direction to form the side wall 22. At the same time, the second plate portion 32 of the first assembly 51 and the first plate portion 31 of the second assembly 52 are overlapped in the plate thickness direction to form the side wall 22. At this time, the overlap length of the first plate portion 31 and the second plate portion 32 is adjusted so that the length of the side wall 22 matches one of the four inner surfaces of the through hole 14. Then, in the first assembly 51 and the second assembly 52, the overlapped first plate portion 31 and the second plate portion 32 are joined by the joining member 50.

The combination of the two bending members 30 forming the first assembly 51 and the combination of the two bending members 30 forming the second assembly 52 may be changed as appropriate.
The method of installing the sleeve 20 in the first embodiment may be modified as follows.

The overlap length of the first plate portion 31 and the second plate portion 32 of the four bending members 30 adjacent to each other is adjusted to form the peripheral wall 21, and the sleeve 20 is preformed by joining them with a joining member 50. At this time, the overlap length of the four side walls 22 is adjusted so that they are aligned with the inner surface of the through hole 14 and the outer blocking member 16 can be put into a compressed state. The size-adjusted sleeve 20 is then placed inside the through hole 14.

The peripheral wall constituent may be a rectangular plate material. In this case, one corner 23 of the peripheral wall 21 is formed by combining two peripheral wall constituents in an L shape. Also, one side wall 22 of the peripheral wall 21 is formed by combining at least two peripheral wall constituents. When the peripheral wall 21 is formed using multiple peripheral wall constituents, adjacent peripheral wall constituents may be joined by a joining member 50 or by welding. Alternatively, the peripheral wall constituents may be bonded to the inner surface of the through hole 14.

The bending member 30 does not have to be formed by bending a metal plate, but may be formed by forming two metal plates of a certain width into an L shape with adhesive tape. When configured in this way, the bending member 30 may be formed into an L shape at the installation site of the sleeve 20, or may be formed into an L shape in a factory.

The outer polymer 85 and the inner polymer 90 do not have to be formed by bending a metal plate, but may be formed by forming two metal plates of a certain width into an L shape with adhesive tape. When configured in this way, the outer polymer 85 and the inner polymer 90 may be formed into an L shape at the construction site of the sleeve 82, or may be formed into an L shape in a factory.

The joining member 50 is attached to the first plate portion 31 and the second plate portion 32 so as to span the first plate portion 31 and the second plate portion 32. However, if the joining member 50 is a double-sided tape, the joining member 50 may be interposed between the overlapping first plate portion 31 and the second plate portion 32 to join the first plate portion 31 and the second plate portion 32.

The joining member 50 is attached to the peripheral wall structure so as to extend over the outer polymer 85 and the inner straight portion forming body 105, the inner polymer 90 and the outer straight portion forming body 100, and the outer polymer 85 and the inner polymer 90. However, when the joining member 50 is a double-sided tape, the joining member 50 may be interposed between the outer polymer 85 and the inner straight portion forming body 105, the inner polymer 90 and the outer straight portion forming body 100, and the outer polymer 85 and the inner polymer 90 to join the two.

○ In the bending member 30, the dimension of the first plate portion 31 in the first direction H1 and the dimension of the second plate portion 32 in the second direction H2 may be the same or may be changed as appropriate. Also, in the outer polymer 85, the dimension of the first plate portion 86 in the first direction H1 and the dimension of the second plate portion 87 in the second direction H2 may be the same or may be changed as appropriate. In the inner polymer 90, the dimension of the first plate portion 91 in the first direction H1 and the dimension of the second plate portion 92 in the second direction H2 may be the same or may be changed as appropriate.

○ Adhesive tape may be applied around the entire circumferential direction of the peripheral walls 21, 71, 83 to maintain the rectangular cylindrical shape of the sleeves 20, 70, 82. In this case, the adhesive tape constitutes the maintaining member.

In the first embodiment, the first plate portion 31 and the second plate portion 32 are overlapped by the two bending members 30 constituting one side wall 22, but the first plate portions 31 may be overlapped by the two bending members 30 constituting one side wall 22. In this case, as shown in FIG. 20, the side wall 22 facing the side wall 22 formed by overlapping the first plate portions 31 also overlaps the first plate portions 31 by adjacent bending members 30. Therefore, the remaining two side walls 22 overlap the second plate portions 32 by adjacent bending members 30.

When configured in this manner, the peripheral wall 21 formed has an elongated rectangular frame shape. Therefore, by selecting the plate parts to be overlapped, the peripheral wall 21 can be easily matched to the shape of the through hole 14. In other words, the bending member 30 has a first plate part 31 and a second plate part 32 of different lengths. Therefore, by selecting the plate parts to be overlapped between the first plate part 31 and the second plate part 32, it is possible to flexibly respond to the shape and size of the through hole 14.

In the second embodiment, one set of side walls 72 of the peripheral wall 71 is formed using the first plate portion 31 and the second plate portion 32 of two bending members 30 that are positioned apart in the circumferential direction of the peripheral wall 71 and the straight portion forming body 80, and the remaining set of side walls 72 may be formed using the first plate portion 31 and the second plate portion 32 of two bending members 30 that are adjacent in the circumferential direction of the peripheral wall 71 without using the straight portion forming body 80.

The partition wall does not have to be a hollow wall, but may be a solid wall.
In the through hole structure of the fireproof hollow wall W, the outer blocking member 16 may be omitted.
The technical ideas that can be understood from the above-described embodiment and modified examples will be described.

(1) A method for installing a sleeve that penetrates a partition wall in a wall thickness direction and surrounds a penetrating member that is disposed in a through hole that is rectangular when viewed in the wall thickness direction, the method comprising:
The sleeve includes a peripheral wall formed into a rectangular frame shape by combining a first peripheral wall constituent, a second peripheral wall constituent, a third peripheral wall constituent, and a fourth peripheral wall constituent, and when a direction in which an internal space surrounded by the peripheral wall opens is defined as a penetration direction, each of the four peripheral wall constituents is L-shaped when viewed along the penetration direction, is made of a metal plate having a constant width in the penetration direction, and has an angular forming portion and two plate portions that protrude perpendicularly from the angular forming portion and have a constant width in the protruding direction,
the first circumferential wall constituent is disposed so that the corner forming portion is aligned with a first corner, which is one of the four corners of the through hole, and the corner forming portion of the second circumferential wall constituent is aligned with a second corner adjacent to the first corner, and the first circumferential wall constituent and the second circumferential wall constituent are disposed so that a tip end portion of the plate portion of the first circumferential wall constituent and a tip end portion of the plate portion of the second circumferential wall constituent overlap with each other on an inner surface between the first corner and the second corner, and the first circumferential wall constituent and the second circumferential wall constituent are joined;
The corner forming portion of the third circumferential wall constituent is aligned with a third corner adjacent to the second corner, and a tip end portion of the plate portion of the second circumferential wall constituent and a tip end portion of the plate portion of the third circumferential wall constituent are arranged so as to overlap with each other on an inner surface between the second corner and the third corner, and the second circumferential wall constituent and the third circumferential wall constituent are joined together;
a fourth circumferential wall component is aligned with a fourth corner adjacent to the third corner, and is arranged so that a tip end of the plate portion of the third circumferential wall component overlaps with a tip end of the plate portion of the fourth circumferential wall component on the inner surface between the third corner and the fourth corner; the third circumferential wall component and the fourth circumferential wall component are joined, and the tip end of the plate portion of the fourth circumferential wall component and the tip end of the plate portion of the first circumferential wall component are arranged to overlap with each other on the inner surface between the fourth corner and the first corner.

(2) The joining member is a bolt that penetrates both plate portions with the direction in which the tip ends of the plate portions overlap being the screw advance/retract direction, and the peripheral wall structure has a plurality of holes in the peripheral direction through which the bolts penetrate.

F...floor plate as partition wall, K...internal space, W...fire-resistant hollow wall as partition wall, 13...fluid pipe as penetrating member, Fa, 14...through hole, 16...outer blocking member, 20, 70, 82...sleeve, 21, 71, 83...peripheral wall, 22, 72...side wall, 30...bending member as peripheral wall constituent body, 31, 86, 91...first plate portion, 32, 87, 92...second plate portion, 33, 88, 93...angle forming portion, 50...maintenance member and joint member, 80...straight portion forming body as peripheral wall constituent body, 83a...side wall long side wall as a guide portion, 83b... short side wall as a side wall, 84... flange, 85... outer polymer, 85a... outer overlapping step as a guide portion, 89, 102... outer flange forming portion, 90... inner polymer, 90a... inner overlapping step as a guide portion, 94, 107... inner flange forming portion, 100... outer straight portion forming body as a second straight portion forming body, 103... outer bulge portion as a guide portion, 105... inner straight portion forming body as a first straight portion forming body, 108... inner bulge portion as a guide portion.

Claims (13)

A sleeve that penetrates a partition wall in a wall thickness direction and surrounds a penetrating member that is disposed in a through hole that is rectangular when viewed in the wall thickness direction,
A peripheral wall is provided which is formed into a rectangular frame shape by combining four peripheral wall constituent bodies,
The peripheral wall has four side walls and corners formed at intersections of adjacent side walls,
If the direction in which the internal space surrounded by the peripheral wall opens is defined as the penetration direction of the peripheral wall,
Each of the four peripheral wall constituents is L-shaped when viewed along the penetration direction, is formed from a metal plate having a constant width in the penetration direction, and has a corner forming portion formed by bending the metal plate to form the corner , and two plate portions made of the metal plate protruding perpendicularly to each other from the corner forming portion and having a constant width in the protruding direction,
Each side wall is formed by overlapping a tip end of the plate portion of one of the peripheral wall constituents adjacent to each other in the circumferential direction of the peripheral wall with a tip end of the plate portion of the other peripheral wall constituent in the plate thickness direction, and the sleeve is characterized in that the internal space can be expanded or contracted by changing the overlap length in the protruding direction. The peripheral wall constructing body further has two or four straight portion forming bodies in addition to the four L-shaped bending members having the corner forming portion and the two plate portions ,
The straight portion forming body is formed from a metal plate and has a shape extending with the constant width ,
At least two of the four side walls can be composed of a tip end portion of one of the plate portions of the two bending members located apart in the circumferential direction of the peripheral wall, a tip end portion of the other plate portion, and the straight portion forming body overlapped with both tip ends in the plate thickness direction so as to connect the two tip ends,
The sleeve according to claim 1 , wherein the internal space can be enlarged or reduced by changing the overlap length in the protruding direction. The peripheral wall has a rectangular frame-shaped flange at one end edge in the penetration direction that protrudes outward from the peripheral wall, and all of the plurality of peripheral wall constituents have plate-shaped flange forming portions that form the flange at one end edge in the penetration direction, and two of the flange forming portions adjacent to each other in the circumferential direction are overlapped in the plate thickness direction of the flange forming portions,
The peripheral wall includes two sets of side walls opposed to each other in the four side walls,
Each of the two side walls of one of the sets is constituted by two of the bending members and one of the straight portion forming bodies, and each of the side walls of the other set is constituted by the two bending members of the one set opposed to each other via the internal space,
In one of the two side walls of one of the sets, the two bending members positioned apart in the circumferential direction are outer polymers that are polymerized on the outside of the rectangular frame shape with respect to the first straight portion forming body connecting the two bending members, and the flange forming portion is polymerized on the other end edge side in the penetration direction relative to the flange forming portion of the first straight portion forming body,
In the other side wall of the two side walls of one of the sets, the two bending members positioned apart in the circumferential direction are inner polymers that are polymerized on the inside of the rectangular frame shape with respect to the second straight portion forming body connecting the two bending members, and the flange forming portion is polymerized on one end edge side in the penetration direction relative to the flange forming portion of the second straight portion forming body,
A sleeve as described in claim 2, wherein in each of the two side walls of the other set, the tip of the plate portion of the outer polymer overlaps so as to be more outward than the tip of the plate portion of the inner polymer. The peripheral wall has the flange at the other end edge in the penetration direction, and all of the four bending members have the flange forming portion at the other end edge in the penetration direction,
When the peripheral wall is constituted by only the four bending members, and each of the two side walls of one set and each of the two side walls of the other set are constituted by two of the bending members,
The sleeve described in claim 3, wherein in one said set, the outer polymer and the inner polymer face each other across the internal space, and in the other said set, the outer polymer and the inner polymer face each other across the internal space. A sleeve that penetrates a partition wall in a wall thickness direction and surrounds a penetrating member that is disposed in a through hole that is rectangular when viewed in the wall thickness direction,
A rectangular frame-shaped peripheral wall is provided which is formed by combining a plurality of peripheral wall constituent bodies,
A direction in which the internal space surrounded by the peripheral wall opens is defined as a penetration direction,
Each of the peripheral wall constituents is made of a metal plate having a plate portion having a constant width in the penetration direction,
The peripheral wall has four side walls,
Each side wall is formed by overlapping a tip end portion of one of at least two peripheral wall constituents adjacent to each other in a circumferential direction of the peripheral wall with a tip end portion of the other peripheral wall constituent in a plate thickness direction, and the internal space can be enlarged or reduced by changing the overlap length in the circumferential direction of the peripheral wall,
The sleeve further comprises a joining member that is attached to the inner surface of one of the plate portions and the other of the plate portions that are adjacent to each other in the circumferential direction and overlap each other in the plate thickness direction, joining both of the plate portions . A sleeve that penetrates a partition wall in a wall thickness direction and surrounds a penetrating member that is disposed in a through hole that is rectangular when viewed in the wall thickness direction,
A rectangular frame-shaped peripheral wall is provided which is formed by combining a plurality of peripheral wall constituent bodies,
A direction in which the internal space surrounded by the peripheral wall opens is defined as a penetration direction,
Each of the peripheral wall constituents is made of a metal plate having a plate portion having a constant width in the penetration direction,
The peripheral wall has four side walls,
Each side wall is formed by overlapping a tip end portion of one of at least two peripheral wall constituents adjacent to each other in a circumferential direction of the peripheral wall with a tip end portion of the other peripheral wall constituent in a plate thickness direction, and the internal space can be enlarged or reduced by changing the overlap length in the circumferential direction of the peripheral wall,
The sleeve further comprises an outer blocking member having a thickness greater than the dimension in the plate thickness direction of the peripheral wall constituent, capable of being compressed and deformed in the thickness direction by an amount of compression equal to or greater than the plate thickness of the peripheral wall constituent, and capable of deforming along a step formed between the outer surface of the peripheral wall constituent overlapped on the inside and the outer surface of the peripheral wall constituent overlapped on the outside, among the peripheral wall constituents adjacent in the circumferential direction of the peripheral wall. 7. The sleeve according to claim 1, wherein the peripheral wall has a rectangular frame-shaped flange at one end edge in the penetration direction that protrudes outward from the peripheral wall , and all of the plurality of peripheral wall constituent bodies have plate-shaped flange forming portions at one end edge in the penetration direction that form the flanges, and the flange forming portions of two peripheral wall constituent bodies adjacent in the circumferential direction are overlapped in the plate thickness direction of the flange forming portions. The sleeve according to claim 7, wherein the flange forming portions adjacent in the circumferential direction are alternately stacked in the plate thickness direction in the circumferential direction. A sleeve as described in any one of claims 1 to 8, wherein the length from the base end to the tip end of one of the two plate portions of the peripheral wall structure is different from the length from the base end to the tip end of the other plate portion. The sleeve according to any one of claims 1 to 9, wherein the two peripheral wall constituent bodies, in which the tip portions of the plate portions are overlapped in the plate thickness direction, fit together and overlap, and have a guide portion that guides adjustment of the overlap length in the circumferential direction by a slide . A penetrating member is disposed in a through hole that penetrates the partition wall in a wall thickness direction and has a rectangular shape when viewed in the wall thickness direction,
the penetrating member is surrounded by a sleeve within the through hole;
The sleeve has a rectangular frame-shaped peripheral wall formed by combining a plurality of peripheral wall constituent bodies,
A direction in which the internal space surrounded by the peripheral wall opens is defined as a penetration direction,
The peripheral wall has four side walls and corners formed at intersections of adjacent side walls ,
Among the plurality of peripheral wall constituents, each of the four peripheral wall constituents is formed from a metal plate having a constant width in the penetration direction, and is formed by bending the metal plate to form the corners ,
The side wall has two peripheral wall constituents arranged adjacent to each other in the circumferential direction of the peripheral wall, and the two adjacent peripheral wall constituents have tip portions overlapping each other in the plate thickness direction of the peripheral wall constituent,
A through hole structure, characterized in that an outer blocking member that is compressively deformed in the thickness direction of the peripheral wall constituent body is disposed between the overlapped peripheral wall constituent body and the inner surface of the through hole. A method for installing a sleeve that penetrates a partition wall in a wall thickness direction and surrounds a penetrating member disposed in a through hole that is rectangular when viewed in the wall thickness direction, the method comprising:
The sleeve has a peripheral wall formed into a rectangular frame shape by combining four peripheral wall constituent bodies,
The peripheral wall has four side walls and corners formed at intersections of adjacent side walls ,
If the direction in which the internal space surrounded by the peripheral wall opens is defined as a penetration direction, and the direction in which the internal space is surrounded is defined as a circumferential direction,
Four peripheral wall structures are disposed in the through hole, the peripheral wall structures having an L-shape when viewed along the through-hole direction, the peripheral wall structures being formed from a metal plate having a constant width in the through-hole direction, the peripheral wall structures having a corner forming portion formed by bending the metal plate to form the corner, and two plate portions each made of the metal plate protruding perpendicularly to each other from the corner forming portion and having a constant width in the protruding direction,
A plurality of the peripheral wall constituents are adjacent to each other so that the protruding direction extends in the circumferential direction,
A sleeve installation method comprising the step of overlapping a tip end of the plate portion of one of the two adjacent peripheral wall constituents with a tip end of the plate portion of the other peripheral wall constituent in a plate thickness direction to form the sleeve having the peripheral wall. A method for installing a sleeve that penetrates a partition wall in a wall thickness direction and surrounds a penetrating member disposed in a through hole that is rectangular when viewed in the wall thickness direction, the method comprising:
The sleeve includes a peripheral wall formed into a rectangular frame shape by combining a first peripheral wall constituent, a second peripheral wall constituent, a third peripheral wall constituent, and a fourth peripheral wall constituent, the peripheral wall having four side walls and a corner formed at an intersection of adjacent side walls, and when a direction in which an internal space surrounded by the peripheral wall opens is defined as a penetration direction, each of the four peripheral wall constituents is L-shaped when viewed along the penetration direction, is formed from a metal plate having a constant width in the penetration direction, and has a corner forming portion formed by bending the metal plate to form the corner, and two plate portions protruding perpendicularly to each other from the corner forming portion and having a constant width in the protruding direction,
the first circumferential wall constituent is disposed so that the corner forming portion is aligned with a first corner, which is one of the four corners of the through hole, and the corner forming portion of the second circumferential wall constituent is aligned with a second corner adjacent to the first corner, and the first circumferential wall constituent and the second circumferential wall constituent are disposed so that a tip end portion of the plate portion of the first circumferential wall constituent and a tip end portion of the plate portion of the second circumferential wall constituent overlap with each other on an inner surface between the first corner and the second corner, and the first circumferential wall constituent and the second circumferential wall constituent are joined;
The corner forming portion of the third circumferential wall constituent is aligned with a third corner adjacent to the second corner, and a tip end portion of the plate portion of the second circumferential wall constituent and a tip end portion of the plate portion of the third circumferential wall constituent are arranged so as to overlap with each other on an inner surface between the second corner and the third corner, and the second circumferential wall constituent and the third circumferential wall constituent are joined together;
a fourth circumferential wall component is aligned with a fourth corner adjacent to the third corner, and is arranged so that a tip end of the plate portion of the third circumferential wall component overlaps a tip end of the plate portion of the fourth circumferential wall component on the inner surface between the third corner and the fourth corner; the third circumferential wall component and the fourth circumferential wall component are joined, and the tip end of the plate portion of the fourth circumferential wall component and the tip end of the plate portion of the first circumferential wall component are arranged to overlap on the inner surface between the fourth corner and the first corner.