Closing member and space closing structure using the same

Abstract

To preferably close a space of a through hole of a division body after an elongated body is inserted into the through hole, regardless of whether or not the elongated body is eccentric relative to the through hole.SOLUTION: A closing member A closes a space between a circular through hole formed in a division body of a structure and an elongated body 1 which is inserted into the through hole. The closing member A has: an outer annular member 10 which is rotatably fitted into the through hole; and an inner annular member 20 which is rotatably fitted into the outer annular member 10. The outer annular member 10 includes, at an area which is eccentric relative to its center Ca, a first eccentric fitting part 11 into which the inner annular member 20 is fitted. The inner annular member 20 includes, at an area which is eccentric relative to its center Cb, a second eccentric fitting part 21 into which the elongated body 1 is fitted. An eccentric distance d1 of the first eccentric fitting part 11 in the outer annular member 10 and an eccentric distance d2 of the second eccentric fitting part 21 in the inner annular member 20 are set to be the same distance or substantially the same distance.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a closing member for closing a space between a circular through hole formed in a partition of a structure and a long member inserted through the through hole, and a space closing structure using the closing member.

Background Art

[0002] As the background art of the present invention, for example, after inserting a pipe (drain riser), which is an example of a long member, into a through hole formed in a floor slab, which is an example of a partition in a structure, a space is filled with mortar or the like to fill the space, thereby closing the space (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When inserting a long member such as a pipe into a through hole formed in a partition such as a floor slab or a wall, due to construction errors or the like, an eccentricity may occur in which the center of the long member is displaced with respect to the center of the through hole. In particular, when the long member is sequentially inserted into through holes formed in a plurality of partitions such as floor slabs on a plurality of floors, even if the long member is not eccentric with respect to the through hole of a certain partition, it may be eccentric with respect to the through hole of another partition due to construction errors or the like. And when such eccentricity is significant, if the space is filled with mortar to fill the space as described above, the thickness of the mortar filled in the space on the eccentric side becomes thin. For example, when the long member expands and contracts under the influence of temperature changes or the like, the mortar may not withstand the expansion and contraction and may be damaged.

[0005] In view of this situation, the main problem of the present invention is to be able to suitably close the space of the through-hole after the long member is inserted, regardless of whether there is eccentricity of the long member with respect to the through-hole of the partition body.

Means for Solving the Problems

[0006] A first characteristic configuration of the present invention is a closing member that closes the space between a circular through-hole formed in a partition body of a structure and a long member inserted through the through-hole, having an outer annular member rotatably and internally fitted in the through-hole, and an inner annular member rotatably and internally fitted in the outer annular member, the outer annular member is provided with a first eccentric fitting portion in a region eccentric from its center, into which the inner annular member is internally fitted, the inner annular member is provided with a second eccentric fitting portion in a region eccentric from its center, into which the long member is internally fitted, the eccentric distance of the first eccentric fitting portion in the outer annular member and the eccentric distance of the second eccentric fitting portion in the inner annular member are set to the same distance or substantially the same distance.

[0007] According to this configuration, when the closing member rotates the outer annular member and the inner annular member internally fitted in the first eccentric fitting portion of the outer annular member relative to each other, and the rotation angle of the inner annular member with respect to the first eccentric fitting portion of the outer annular member is changed, according to the rotation angle at this time, the eccentric amount of the first eccentric fitting portion in the outer annular member and the eccentric amount of the second eccentric fitting portion in the inner annular member are combined, and the eccentric amount and eccentric direction of the second eccentric fitting portion with respect to the outer annular member are changed. Thus, for example, when a long member such as a pipe is not eccentric with respect to a through hole formed in a partition body such as a floor slab or a wall, as a fitting state between the outer annular member and the inner annular member, the center of the outer annular member and the center of the second eccentric fitting portion in the inner annular member coincide with each other, and the eccentricity of the second eccentric fitting portion with respect to the outer annular member becomes zero. If the outer annular member and the inner annular member of the closing member are relatively rotated so that a zero-eccentric state is obtained, the space between the through hole and the long member inserted concentrically with respect to the through hole can be closed by the closing member.

[0008] Further, when the long member is eccentric with respect to the through hole of the partition body, as a fitting state between the outer annular member and the inner annular member, the second eccentric fitting portion of the inner annular member is eccentric with respect to the outer annular member, and the eccentricity of the second eccentric fitting portion with respect to the outer annular member corresponds to the eccentricity of the long member with respect to the through hole. If the outer annular member and the inner annular member of the closing member are relatively rotated so that an eccentric state is obtained, the space after the long member is eccentrically inserted with respect to the through hole can be closed by the closing member.

[0009] As a result, regardless of whether the long member is eccentric with respect to the through hole of the partition body, the space of the through hole after the long member is inserted can be suitably closed by the closing member.

[0010] The second characteristic configuration of the present invention lies in that the outer annular member and the inner annular member are made of different materials so that the inner annular member has higher elasticity than the outer annular member.

[0011] According to this configuration, the adhesion between the inner annular member and the long member can be enhanced to improve the water-stopping property. For example, when the long member expands and contracts in the radial direction under the influence of temperature changes or the like, the inner annular member expands and contracts in the radial direction between the long member and the outer annular member according to the expansion and contraction, and by this expansion and contraction, the state in which the space between the long member and the outer annular member is closed by the inner annular member can be maintained.

[0012] Moreover, compared with the case where the outer annular member has the same elasticity as the inner annular member, the fitting state between them can be easily changed by the relative rotation between the outer annular member and the inner annular member.

[0013] As a result, while ensuring the water stoppage property by the inner annular member between the long member and the outer annular member, it is possible to facilitate the change in the fitting state by the relative rotation between the outer annular member and the inner annular member according to the amount of eccentricity of the long member with respect to the through hole of the partition member.

[0014] The third characteristic configuration of the present invention lies in that the inner annular member is composed of different materials on the inner peripheral side and the outer peripheral side so that the inner peripheral side has higher elasticity than the outer peripheral side.

[0015] According to this configuration, the adhesion between the inner peripheral side of the inner annular member and the long member can be enhanced to improve the water stoppage property. Also, for example, when the long member expands and contracts in the radial direction under the influence of temperature changes or the like, the inner peripheral side of the inner annular member expands and contracts in the radial direction between the long member and the outer peripheral side of the inner annular member according to the expansion and contraction, and by this expansion and contraction, the state where the space between the long member and the outer annular member is closed by the inner annular member can be maintained.

[0016] Moreover, compared with the case where the entire inner annular member has high elasticity, the fitting state between the outer annular member and the inner annular member can be easily changed by the relative rotation between them.

[0017] As a result, while ensuring the water stoppage property by the inner annular member between the long member and the outer annular member, it is possible to facilitate the change in the fitting state by the relative rotation between the outer annular member and the inner annular member according to the amount of eccentricity of the long member with respect to the through hole of the partition member.

[0018] The fourth characteristic configuration of the present invention is a space closing structure for closing the space between a circular through hole formed in a partition member of a structure and a long member inserted through the through hole, The closing member has an outer annular member rotatably and internally fitted in the through hole, and an inner annular member rotatably and internally fitted in the outer annular member. The outer annular member is provided with a first eccentric fitting portion into which the inner annular member is fitted in an eccentric region from its center. The inner annular member is provided with a second eccentric fitting portion into which the long body is fitted in an eccentric region from its center.

[0019] According to this configuration, when closing the space between the through hole and the long body inserted into the through hole with a closing member, the outer annular member and the inner annular member of the closing member are relatively rotated according to the amount of eccentricity of the long body with respect to the through hole at that time, and the fitting state between the outer annular member and the inner annular member is changed. Then, according to the change in the fitting state at this time, the amount of eccentricity of the first eccentric fitting portion in the outer annular member and the amount of eccentricity of the second eccentric fitting portion in the inner annular member are combined, and the amount of eccentricity of the second eccentric fitting portion with respect to the outer annular member gradually approaches the amount of eccentricity of the long body with respect to the through hole and becomes equivalent to the amount of eccentricity of the long body with respect to the through hole.

[0020] Thus, for example, when the long body is not eccentric with respect to the through hole of the partitioning body, as the fitting state between the outer annular member and the inner annular member, the center of the outer annular member and the center of the second eccentric fitting portion in the inner annular member are made to coincide, and the outer annular member and the inner annular member of the closing member are relatively rotated so that the amount of eccentricity of the second eccentric fitting portion with respect to the outer annular member becomes zero, then the space between the through hole and the long body inserted concentrically with respect to this through hole can be closed with the closing member.

[0021] Also, when the long body is eccentric with respect to the through hole of the partitioning body, as the fitting state between the outer annular member and the inner annular member, the second eccentric fitting portion of the inner annular member is eccentric with respect to the outer annular member, and the outer annular member and the inner annular member of the closing member are relatively rotated so that the amount of eccentricity of the second eccentric fitting portion with respect to the outer annular member becomes equivalent to the amount of eccentricity of the long body with respect to the through hole, then the space between the through hole and the long body inserted concentrically with respect to this through hole can be closed with the closing member.

[0022] As a result, regardless of whether there is eccentricity of the long member with respect to the through hole of the partition body, the space of the through hole after the long member is inserted can be suitably closed by the closing member.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0024] Hereinafter, an example of a mode for carrying out the present invention will be described based on the drawings.

[0025] Figure 1 shows a space closing structure in which a circular through hole Sa for inserting a pipe is formed by core punching at a pipe insertion location of a floor slab S, which is an example of a partition body in a structure, and the space 2 between this through hole Sa and a straight pipe joint (socket) 1, which is an example of a long member inserted into the through hole Sa, is closed using a closing member A according to the present invention. The pipe joint 1 is inserted into the through hole Sa of the floor slab S at the construction stage in order to enable connection between the pipe 3 at the construction stage and the pipe 4 from the floor directly below.

[0026] Note that the partition body may be, for example, a wall or the like other than the floor slab S. The through hole Sa is not limited to being formed by core punching, and may be formed using a void pipe. The long member may be, for example, a T-shaped or Y-shaped pipe joint other than the pipe joint 1, a manifold, a pipe such as a drain pipe or a water supply pipe, or a wiring.

[0027] As shown in FIGS. 1 to 3, the closing member A closely contacts the inner peripheral surface of the through hole Sa formed in the floor slab S and the outer peripheral surface of the pipe joint 1 inserted into the through hole Sa, and closes the space 2 between the through hole Sa and the pipe joint 1 in a water-stopping manner. The closing member A has an outer annular member 10 that is rotatably fitted inside the through hole Sa of the floor slab S, and an inner annular member 20 that is rotatably fitted inside the outer annular member 10. As shown in FIGS. 4 to 5, the outer annular member 10 is provided with a first eccentric fitting portion 11 into which the inner annular member 20 is fitted inside a region eccentric from its center Ca. The inner annular member 20 is provided with a second eccentric fitting portion 21 into which the pipe joint 1 is fitted inside a region eccentric from its center Cb.

[0028] Specifically, as shown in FIGS. 4 to 5, the outer annular member 10 is formed in a cylindrical shape with both its outer and inner circumferences being circular, but is formed in an eccentric shape where the center position of the outer circumference and the center position of the inner circumference are different. As a result, the wall thickness between the inner and outer circumferences varies in the circumferential direction. In FIGS. 4 to 5, with respect to the center Ca of the circular outer circumference of the outer annular member 10, the center Cc of the circular inner circumference of the outer annular member 10 is eccentric to the right in the drawing plane. Thus, in the outer annular member 10 shown in FIGS. 4 to 5, the part on the left side of the drawing plane becomes the maximum wall thickness part t1a where the wall thickness between the inner and outer circumferences is the largest, and the opposite part on the right side of the drawing plane becomes the minimum wall thickness part t1b where the wall thickness between the inner and outer circumferences is the smallest.

[0029] As shown in FIGS. 2 to 3, in the outer annular member 10, a fitting portion 12 is formed on the outer peripheral side thereof to be fitted into the through hole Sa of the floor slab S, and a first eccentric fitting portion 11 into which the inner annular member 20 is fitted is formed on the inner peripheral side thereof. In this way, the outer annular member 10 is provided with the first eccentric fitting portion 11 into which the inner annular member 20 is fitted in a region eccentric from the center Ca of its outer circumference.

[0030] As shown in FIGS. 4 to 5, also in the inner annular member 20, similar to the outer annular member 10, it is formed in a cylindrical shape with both its outer and inner circumferences being circular, but is formed in an eccentric shape where the center position of the outer circumference and the center position of the inner circumference are different. As a result, the wall thickness between the inner and outer circumferences varies in the circumferential direction.

[0031] In the inner annular member 20, a fitting portion 22 is formed on the outer peripheral side thereof to be fitted into the first eccentric fitting portion 11 of the outer annular member 10, and a second eccentric fitting portion 21 into which the pipe joint 1 is fitted is formed on the inner peripheral side thereof. In this way, the inner annular member 20 is provided with the second eccentric fitting portion 21 into which the pipe joint 1 is fitted in a region eccentric from the center Cb of its outer circumference.

[0032] As shown in FIGS. 4 to 6, since the inner annular member 20 is rotatable with respect to the outer annular member 10, by rotating the inner annular member 20, the thickness between the inner circumference and the outer circumference of the inner annular member 20 with respect to the outer annular member 10 can be adjusted. For example, as shown in FIGS. 4(a) and 6(a), when the inner annular member 20 is rotated such that the center Cd of the circular inner circumference of the inner annular member 20 is eccentric to the left in the drawing plane with respect to the center Cb of the circular outer circumference of the inner annular member 20, in the inner annular member 20, the portion on the right side of the drawing plane becomes the maximum thickness portion t2a where the thickness between the inner circumference and the outer circumference is the maximum, and the opposite portion on the left side of the drawing plane becomes the minimum thickness portion t2b where the thickness between the inner circumference and the outer circumference is the minimum. Conversely, as shown in FIGS. 4(b) and 6(b), when the inner annular member 20 is rotated such that the center Cd of the circular inner circumference of the inner annular member 20 is eccentric to the right in the drawing plane with respect to the center Cb of the circular outer circumference of the inner annular member 20, in the inner annular member 20, the portion on the left side of the drawing plane becomes the maximum thickness portion t2a, and the opposite portion on the right side of the drawing plane becomes the minimum thickness portion t2b.

[0033] Both the outer annular member 10 and the inner annular member 20 have the centers Cc and Cd of the circular inner circumferences eccentric with respect to the centers Ca and Cb of the circular outer circumferences. However, as shown in FIGS. 4 to 6, their eccentric distances d1 and d2 are set to the same distance or substantially the same distance. In each of FIGS. 4 to 6(a), in the outer annular member 10, the center Cc of the circular inner circumference is eccentric to the right in the drawing plane by the eccentric distance d1 with respect to the center Ca of the circular outer circumference, while in the inner annular member 20, the center Cd of the circular inner circumference is eccentric to the left in the drawing plane, which is the opposite direction to the outer annular member 10, by the same eccentric distance d2 as the eccentric distance d1 with respect to the center Cb of the circular outer circumference. In each of FIGS. 4 to 6(b), in the outer annular member 10, in addition to the center Cc of the circular inner circumference being eccentric to the right in the drawing plane by the eccentric distance d1 with respect to the center Ca of the circular outer circumference, in the inner annular member 20, the center Cd of the circular inner circumference is eccentric to the right in the drawing plane, which is the same direction as the outer annular member 10, by the same eccentric distance d2 as the eccentric distance d1 with respect to the center Cb of the circular outer circumference.

[0034] As a result, when the closing member A rotates relative to the outer annular member 10 and the inner annular member 20 fitted inside the first eccentric fitting portion 11 of the outer annular member 10, and the rotation angle of the inner annular member 20 relative to the first eccentric fitting portion 11 of the outer annular member 10 is changed, the eccentricity of the first eccentric fitting portion 11 in the outer annular member 10 and the eccentricity of the second eccentric fitting portion 21 in the inner annular member 20 are combined according to the rotation angle at this time, and the eccentricity and the eccentric direction of the second eccentric fitting portion 21 relative to the outer annular member 10 are changed.

[0035] Also, as described above, the outer annular member 10 and the inner annular member 20 are set such that the eccentric distances d1 and d2 of the eccentric fitting portions 11 and 21 therein are the same distance or substantially the same distance.

[0036] As a result, for example, as shown in FIGS. 2 and 6(a), the rotation angle of the inner annular member 20 relative to the first eccentric fitting portion 11 of the outer annular member 10 is changed so that the eccentric direction of the second eccentric fitting portion 21 in the inner annular member 20 is exactly opposite (leftward in the drawing in FIGS. 2 and 6(a)) to the eccentric direction of the first eccentric fitting portion 11 in the outer annular member 10 (rightward in the drawing in FIGS. 2 and 6(a)). Then, the eccentricity (eccentric distance d1) of the first eccentric fitting portion 11 in the outer annular member 10 and the eccentricity (eccentric distance d2) of the second eccentric fitting portion 21 in the inner annular member 20 are offset. And by this offset, the fitting state of the outer annular member 10 and the inner annular member 20 becomes a zero-eccentric state where the second eccentric fitting portion 21 of the outer annular member 10 and the inner annular member 20 are concentric and the eccentricity of the second eccentric fitting portion 21 relative to the outer annular member 10 becomes zero. And in this zero-eccentric state, the circumferential wall thickness of the closing member A is such that the minimum circumferential wall thickness portion t2b of the inner annular member 20 overlaps with the maximum circumferential wall thickness portion t1a of the outer annular member 10 in the circumferential direction, and the maximum circumferential wall thickness portion t2a of the inner annular member 20 overlaps with the minimum circumferential wall thickness portion t1b of the outer annular member 10 in the circumferential direction, and the sum of them is constant.

[0037] Further, for example, as shown in FIGS. 3 and 6(b), the rotation angle of the inner annular member 20 with respect to the eccentric direction of the first eccentric fitting portion 11 in the outer annular member 10 (the right direction in the paper plane in FIGS. 3 and 6(b)) is changed so that the eccentric direction of the second eccentric fitting portion 21 in the inner annular member 20 is the same direction (the right direction in the paper plane in FIGS. 3 and 6(b)). Then, the eccentricity (eccentric distance d2) of the second eccentric fitting portion 21 in the inner annular member 20 is added to the eccentricity (eccentric distance d1) of the first eccentric fitting portion 11 in the outer annular member 10. And by this addition, the fitting state between the outer annular member 10 and the inner annular member 20 becomes the maximum eccentric state where the eccentricity of the second eccentric fitting portion 21 with respect to the outer annular member 10 is maximum (eccentric distance d1 + d2). And in this maximum eccentric state, the circumferential wall thickness of the closing member A gradually changes between the maximum wall thickness obtained by adding the maximum wall thickness portions t1a and t2a in the circumferential direction of the outer annular member 10 and the inner annular member 20, and the minimum wall thickness obtained by adding the minimum wall thickness portions t1b and t2b in the circumferential direction of the outer annular member 10 and the inner annular member 20, such that the maximum wall thickness portion t2a in the circumferential direction of the inner annular member 20 overlaps with the maximum wall thickness portion t1a in the circumferential direction of the outer annular member 10, and the minimum wall thickness portion t2b of the inner annular member 20 overlaps with the minimum wall thickness portion t2b in the circumferential direction of the outer annular member 10.

[0038] That is, by changing the rotation angle of the inner annular member 20 with respect to the first eccentric fitting portion 11 of the outer annular member 10, the fitting state between the outer annular member 10 and the inner annular member 20 can be changed between the zero eccentric state (see FIGS. 2 and 6(a)) and the maximum eccentric state (see FIGS. 3 and 6(b)) described above. Accordingly, the eccentricity and the eccentric direction of the second eccentric fitting portion 21 with respect to the outer annular member 10 can be changed, and the circumferential wall thickness of the closing member A can be changed.

[0039] Here, for example, in a piping process (see FIG. 1) of connecting the piping 3 on the construction floor to the piping 4 from the floor directly below the construction floor via a pipe joint 1 inserted into a through-hole Sa for piping formed in the floor slab S of the construction floor, it is assumed that due to construction errors or the like, an eccentricity occurs where the center C2 of the piping 4 from the floor directly below is displaced with respect to the center C1 of the through-hole Sa for piping (see FIGS. 3 and 6(b)). In this case, for example, after fitting the outer annular member 10 into the through-hole Sa for piping, the inner annular member 20 with the pipe joint 1 internally fitted into the second eccentric fitting portion 21 is fitted into the first eccentric fitting portion 11 of the outer annular member 10. Then, the rotation angle of the outer annular member 10 with respect to the through-hole Sa and the rotation angle of the inner annular member 20 with respect to the first eccentric fitting portion 11 of the outer annular member 10 are changed so that the center C3 of the pipe joint 1 coincides with the center C2 of the piping 4 from the floor directly below. Then, by changing these rotation angles, while maintaining the state where the inner peripheral surface of the inner annular member 20 is in close contact with the outer peripheral surface of the pipe joint 1, the eccentricity amount and eccentricity direction of the pipe joint 1 in the outer annular member 10 can be gradually changed to correspond to the eccentricity amount and eccentricity direction of the piping 4 with respect to the through-hole Sa, and the position of the pipe joint 1 in the outer annular member 10 can be changed to a position connectable to the piping 4 from the floor directly below. Thereby, as shown in FIGS. 3 and 6(b), the pipe joint 1 can be connected to the piping 4 from the floor directly below while maintaining the state where the space 2 between the pipe joint 1 and the through-hole Sa is closed by the closing member A.

[0040] Also, in the above piping process, even when there is no eccentricity of the piping 4 with respect to the through-hole Sa for piping due to construction errors or the like (see FIGS. 2 and 6(a)), similar to the case where eccentricity occurs, by changing the rotation angle of the outer annular member 10 with respect to the through-hole Sa and the rotation angle of the inner annular member 20 with respect to the first eccentric fitting portion 11 of the outer annular member 10, the position of the pipe joint 1 in the outer annular member 10 can be changed to a position connectable to the piping 4 from the floor directly below (the position in the zero-eccentricity state). Thereby, as shown in FIGS. 2 and 6(a), the pipe joint 1 can be connected to the piping 4 from the floor directly below while maintaining the state where the space 2 between the pipe joint 1 and the through-hole Sa is closed by the closing member A.

[0041] That is, in the blocking member A, the first eccentric fitting portion 11 of the outer annular member 10 and the inner annular member 20 fitted inside the first eccentric fitting portion 11 are configured to function as an eccentric corresponding portion B corresponding to the eccentricity of the pipe 4 and the pipe joint 1 from the directly lower floor with respect to the through hole Sa of the floor slab S.

[0042] As a result, regardless of the presence or absence of eccentricity of the pipe 4 and the pipe joint 1 from the directly lower floor with respect to the through hole Sa of the floor slab S, while maintaining the state where the space 2 between the pipe joint 1 and the through hole Sa is blocked by the blocking member A, the piping and the like can be performed well over the construction floor and its directly lower floor as described above.

[0043] As shown in FIGS. 4 to 5, the inner annular member 20 has a flange portion 23 that projects laterally outward from its upper end portion and closes the gap with the outer annular member 10. The outer annular member 10 has a ring-shaped recess 13 on the inner peripheral side of its upper end portion to receive the flange portion 23 of the inner annular member 20. The recess 13 is formed so that its depth is the same as the thickness of the flange portion 23. Thereby, as shown in FIGS. 2 to 3, the fitting depth of the inner annular member 20 with respect to the outer annular member 10 in the state where the inner annular member 20 is fitted inside the outer annular member 10 can be made constant, and the upper end surface of the outer annular member 10 and the upper end surface of the inner annular member 20 can be flush.

[0044] The outer annular member 10 is formed using a hard resin such as vinyl chloride resin. As shown in FIGS. 2 to 5, the outer annular member 10 is integrally formed with a flange portion 14 that projects laterally outward from its upper end portion and is received on the floor surface of the floor slab. As shown in FIGS. 4 to 5, on the lower side of the outer annular member 10, three (a plurality of) annular water stop portions 15 are integrally provided that project laterally outward from its outer peripheral surface and extend in the circumferential direction of the outer annular member 10. Each water stop portion 15 is formed using a soft resin having elasticity such as butyl rubber. Each water stop portion 15 adheres to the concrete Sb of the floor slab S and closes the gap with the concrete Sb of the floor slab S so as to be able to stop water.

[0045] Furthermore, the outer annular member 10 may be formed of a soft resin such as silicone rubber or elastomer. The water stop portion 15 may be integrally provided on the outer peripheral surface of the outer annular member 10 by being joined thereto by welding or adhesion to the outer annular member 10, or may be integrally provided on the outer peripheral surface of the outer annular member 10 by two-color molding of a hard resin forming the outer annular member 10 and a soft resin forming the water stop portion 15.

[0046] The inner annular member 20 is formed of a soft resin such as silicone rubber or elastomer, which is a different material from the outer annular member 10, so as to have higher stretchability than the outer annular member 10.

[0047] Thereby, the adhesion between the inner annular member 20 and the pipe joint 1 can be enhanced to improve the water stoppage property. For example, when the pipe joint 1 expands and contracts in the radial direction under the influence of temperature change or the like, the inner annular member 20 expands and contracts in the radial direction between the pipe joint 1 and the outer annular member 10 in accordance with the expansion and contraction, and due to this expansion and contraction, the state where the space between the pipe joint 1 and the outer annular member 10 is blocked by the inner annular member 20 can be maintained.

[0048] In addition, compared with the case where the outer annular member 10 has the same stretchability as the inner annular member 20, it becomes easier to change the fitting state between the outer annular member 10 and the inner annular member 20 due to their relative rotation.

[0049] As a result, while ensuring the water stoppage property by the inner annular member 20 between the pipe joint 1 and the outer annular member 10, it is possible to facilitate the change of the fitting state due to the relative rotation between the outer annular member 10 and the inner annular member 20 according to the amount of eccentricity of the pipe joint 1 with respect to the through hole Sa of the floor slab S.

[0050] As shown in Fig. 4, at the lower part of the inner annular member 20, a water stop portion 24 is integrally formed so as to be in close contact with the inner peripheral surface of the outer annular member 10 and block the gap with the inner peripheral surface of the outer annular member 10 to prevent water leakage. The water stop portion 24 is formed in a ring shape extending in the circumferential direction of the inner annular member 20 in a state of protruding laterally outward from the outer peripheral surface of the inner annular member 20.

[0051] Thereby, while ensuring the water stoppage property between the outer annular member 10 and the inner annular member 20, by reducing the contact area between the outer annular member 10 and the inner annular member 20, it is easier to change the fitting state between the outer annular member 10 and the inner annular member 20 due to their relative rotation.

[0052] In addition, as the inner annular member 20, the inner peripheral side and the outer peripheral side may be made of different materials so that the inner peripheral side has higher elasticity than the outer peripheral side. As an example, the inner annular member 20 can be formed by two-color molding of, for example, a hard resin such as vinyl chloride resin forming its outer peripheral side and a soft resin such as silicone rubber or elastomer forming its inner peripheral side.

[0053] In this case, the adhesion between the inner peripheral side of the inner annular member 20 and the pipe joint 1 can be enhanced to improve the water stoppage property. Also, for example, when the pipe joint 1 expands and contracts in the radial direction under the influence of temperature change or the like, the inner peripheral side of the inner annular member 20 expands and contracts in the radial direction between the pipe joint 1 and the outer peripheral side of the inner annular member 20 according to the expansion and contraction, and due to this expansion and contraction, the state where the space between the pipe joint 1 and the outer annular member 10 is blocked by the inner annular member 20 can be maintained.

[0054] Moreover, compared with the case where the entire inner annular member 20 has high elasticity, it is easier to change the fitting state between the outer annular member 10 and the inner annular member 20 due to their relative rotation.

[0055] As a result, while ensuring the water stoppage property by the inner annular member 20 between the pipe joint 1 and the outer annular member 10, it is possible to easily change the fitting state by the relative rotation of the outer annular member 10 and the inner annular member 20 according to the eccentricity of the pipe joint 1 with respect to the through hole Sa of the floor slab S.

[0056] 〔Alternative Embodiment〕 An alternative embodiment of the present invention will be described. Note that the configurations of the respective alternative embodiments described below are not limited to being applied individually, and can also be applied in combination with the configurations of the above-described embodiment and other alternative embodiments.

[0057] (1) In the above embodiment, as the closing member A, an example was given of a member that closes the space 2 between the circular through hole Sa formed by core extraction at the pipe insertion portion of the floor slab S and the pipe joint 1 inserted into this through hole Sa. However, it is not limited to this. For example, as shown in FIG. 7, a member that closes the space 2 between the through hole Sa formed using the void pipe 5 embedded in the floor slab S and the pipe joint 1 inserted into this through hole Sa may also be used. In this case, as shown in FIG. 7, a peripheral edge portion 14A that fits externally to the upper end portion of the void pipe 5 may be integrally formed on the flange portion 14 of the outer annular member 10 in the closing member A so as to cover the upper end portion of the void pipe 5.

[0058] (2) In the above embodiment, as the outer annular member 10, an example was given of a member integrally provided with three water stop portions 15 formed in a ring shape on its outer peripheral surface. However, it is not limited to this. For example, as shown in FIG. 8, a member integrally provided with a plurality of water stop portions 16 formed in a thin film shape protruding greatly on the outer peripheral surface of the outer annular member 10 may also be used.

[0059] (3) In the above embodiment, as the inner annular member 20, an example was given of a member integrally provided with a water stop portion 24 formed in a ring shape on its outer peripheral surface. However, it is not limited to this. For example, as shown in FIG. 9, a member integrally provided with a plurality of water stop portions 25 formed in a spiral shape may also be used. In this case, while ensuring higher water stoppage performance, it is possible to facilitate the change of the fitting state between the outer annular member 10 and the inner annular member 20 due to their relative rotation.

[0060] (4) In the above-described embodiment, the inner annular member 20 having the flange portion 23 projecting laterally outward from its upper end portion is exemplified. However, the present invention is not limited thereto. For example, as shown in FIG. 10, in a state of floating from the upper surface of the outer annular member 10, ear-shaped operation pieces 26 that facilitate the rotation operation of the inner annular member 20 with respect to the outer annular member 10 may be integrally formed at a plurality of locations (four locations in FIG. 10) in the circumferential direction at the upper portion of the inner annular member 20.

Explanation of Reference Numerals

[0061] 1 Pipe joint (long member) 2 Space 10 Outer annular member 11 First eccentric fitting portion 20 Inner annular member 21 Second eccentric fitting portion A Closing member Ca Center (outer annular member) Cb Center (inner annular member) S Floor slab (partition body) Sa Through hole d1 Eccentric distance d2 Eccentric distance

Claims

1. A closing member for closing the space between a circular through-hole formed in a partition of a structure and a long member inserted through the through-hole, comprising an outer annular member rotatably and internally fitted into the through-hole and an inner annular member rotatably and internally fitted into the outer annular member, wherein the outer annular member is provided with a first eccentric fitting portion into which the inner annular member is internally fitted in a region eccentric from its center, the inner annular member is provided with a second eccentric fitting portion into which the long member is internally fitted in a region eccentric from its center, and a closing member in which the eccentric distance of the first eccentric fitting portion in the outer annular member and the eccentric distance of the second eccentric fitting portion in the inner annular member are set to the same distance or substantially the same distance.

2. The closing member according to claim 1, wherein the outer annular member and the inner annular member are made of different materials so that the inner annular member has higher elasticity than the outer annular member.

3. The closing member according to claim 1 or 2, wherein the inner annular member is made of different materials for its inner peripheral side and outer peripheral side so that the inner peripheral side has higher elasticity than the outer peripheral side.

4. A space closing structure for closing the space between a circular through-hole formed in a partition of a structure and a long member inserted through the through-hole with a closing member, wherein the closing member comprises an outer annular member rotatably and internally fitted into the through-hole and an inner annular member rotatably and internally fitted into the outer annular member, the outer annular member is provided with a first eccentric fitting portion into which the inner annular member is internally fitted in a region eccentric from its center, and the inner annular member is provided with a second eccentric fitting portion into which the long member is internally fitted in a region eccentric from its center.

Images