Waterproof construction, waterproofing equipment

Abstract

To realize a waterproof structure that easily ensures sufficient waterproof performance. [Solution] The waterproof structure is provided in a gap space 101 between a through hole WH formed in a wall W that separates a first space S1 and a second space S2 and an elongated body 10 inserted into the through hole WH. The waterproof structure includes a first flange 2, a second flange 3, and a cylindrical body 4. The first flange 2 is fixed parallel to a first wall surface W1 on the first space side L1 of the wall W. The second flange 3 is fixed parallel to a second wall surface W2 on the second space side L2 of the wall W. The cylindrical body 4 is disposed in the through hole WH along the axial direction L of the through hole WH and is held by the first flange 2 and the second flange 3. The cylindrical body 4 has an inner circumferential surface that surrounds the hollow portion and has an inclined lower surface 411 that inclines upward Z1 as it moves from the first space S1 toward the second space S2.

Description

[Technical Field]

[0001] The present invention relates to a waterproof structure provided in a gap between a through hole formed in a wall body and an elongated body inserted into the through hole, and a waterproofing device used in the waterproof structure. [Background technology]

[0002] When a long object such as a pipe or cable is arranged across both a space on one side of a wall and a space on the other side of the wall, the long object may be inserted through a through-hole formed in the wall. One example of a long object that may be inserted through a through-hole formed in a wall is a pipe or cable that connects an indoor unit and an outdoor unit in an air conditioner. Specifically, the indoor unit is often placed inside a residence, building, or other structure (such as a building), and the outdoor unit is often placed outside the building. The indoor unit and the outdoor unit are connected by a pipe to circulate a refrigerant between them. Such a pipe is arranged across the interior and exterior of the building, passing through a through-hole formed in the building's wall.

[0003] When an elongated object is inserted into a through-hole formed in a wall, a waterproof structure may be provided to prevent water present in a space on one side of the wall from infiltrating into a space on the other side of the wall. For example, when a wall separates the interior and exterior spaces of a building, if it rains outside the building, it is necessary to prevent rainwater from infiltrating into the interior of the building through the through-hole formed in the wall of the building.

[0004] The waterproof structure includes, for example, a waterproofing member fixed to a through-hole formed in a wall body, and the waterproofing member fills the gap between the through-hole formed in the wall body and the elongated body inserted into the through-hole to prevent water from entering the gap.

[0005] For example, Japanese Patent Application Laid-Open Publication No. 2015-078741 (Patent Document 1) discloses a waterproof structure (wall-penetrating sleeve installation structure 10) for installing an elongated body that is inserted into a through-hole (H4) formed in a wall (wall material W'). This waterproof structure (wall-penetrating sleeve installation structure 10) includes a waterproofing device (wall-penetrating sleeve 110) for preventing water from entering the interior space of a building or the like. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-078741 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the waterproofing device (wall-penetrating sleeve 110) included in the waterproofing structure (wall-penetrating sleeve installation structure 10) described in Patent Document 1 has a spacer 120 disposed between the wall surface of the wall body (wall material W') and the waterproofing device (wall-penetrating sleeve 110). The spacer 120 described in Patent Document 1 tilts the flange (flange portion 130) relative to the wall surface (wall material W'), which makes it easy to create a gap between the flange (flange portion 130) and the wall surface that allows water to enter the through hole (H4).

[0008] Therefore, it is desirable to realize a waterproof structure that can easily ensure sufficient waterproof performance, and it is also desirable to realize a waterproofing tool that can easily and appropriately realize such a waterproof structure. [Means for solving the problem]

[0009] The waterproof structure according to the present invention comprises: A waterproof structure provided in a gap space between a through hole formed in a wall body that separates a first space and a second space and an elongated body that is inserted into the through hole, a first flange fixed parallel to a first wall surface of the wall body on the first space side; a second flange fixed parallel to a second wall surface of the wall body on the second space side; a cylindrical body that is disposed in the through hole along the axial direction of the through hole and is held by the first flange and the second flange, The cylindrical body has an inner circumferential surface surrounding a hollow portion, the inner circumferential surface having an inclined lower surface that inclines upward from the first space toward the second space.

[0010] According to this configuration, the first flange easily adheres to the first wall surface, making it easy to fix the first flange at a desired position relative to the first wall surface. Similarly, the second flange easily adheres to the second wall surface, making it easy to fix the second flange at a desired position relative to the second wall surface. Furthermore, according to this configuration, even if water seeps into the hollow portion of the cylindrical body from the first space, the water cannot reach the second space without overcoming the inclined lower surface. Therefore, sufficient waterproofing performance is easily ensured.

[0011] The waterproofing device according to the present invention is a waterproofing device for waterproofing a gap space between a through hole formed in a wall body that separates a first space and a second space and an elongated body that is inserted into the through hole, a first flange fixed parallel to a first wall surface of the wall body on the first space side; a second flange fixed parallel to a second wall surface of the wall body on the second space side; a cylindrical body disposed in the through hole along the axial direction of the through hole, When the cylindrical body is held by the first flange fixed to the first wall surface and the second flange fixed to the second wall surface, the inner surface surrounding the hollow portion has an inclined lower surface that slopes upward as it moves from the first flange side to the second flange side.

[0012] According to this configuration, the first flange easily adheres to the first wall surface, making it easy to fix the first flange at a desired position relative to the first wall surface. Similarly, the second flange easily adheres to the second wall surface, making it easy to fix the second flange at a desired position relative to the second wall surface. Furthermore, according to this configuration, even if water seeps into the hollow portion of the cylindrical body from the first space, the water cannot reach the second space without climbing over the inclined lower surface. Therefore, a waterproof structure with sufficient waterproof performance can be easily and appropriately realized.

[0013] Preferred embodiments of the present invention will be described below, but the scope of the present invention is not limited to the preferred embodiments described below.

[0014] As one aspect of the waterproof structure, a waterproof seal disposed between the first wall surface and the first flange in a state surrounding the entire periphery of the through hole; The waterproof seal further includes an auxiliary seal that is disposed on the first space side of the waterproof seal in a state where the auxiliary seal surrounds the waterproof seal over the entire periphery.

[0015] According to this configuration, the double seal using both the waterproof seal and the auxiliary seal can effectively prevent water from entering the gap between the through hole and the cylindrical body.

[0016] As one aspect of the waterproof equipment, The inner peripheral surface of the cylindrical body is formed in a tapered shape that gradually reduces in diameter from the first flange side toward the second flange side.

[0017] According to this configuration, when the cylindrical body is placed in the through hole, the lower inner circumferential surface always has an inclined lower surface, so that during construction, the worker does not need to pay attention to the up-down direction of the cylindrical body when realizing a configuration in which the cylindrical body has an inclined lower surface.

[0018] As one aspect of the waterproof equipment, the cylindrical body has a first thread portion on its outer circumferential surface, The second flange has a second threaded portion that threadably engages with the first threaded portion.

[0019] According to this configuration, with the tubular body connected to the first flange placed in the through hole, a worker can fasten the second flange having the second threaded portion to the tubular body having the first threaded portion, thereby fixing the first flange and the second flange to the wall body via the tubular body. Therefore, the worker can independently install the waterproof structure from the second space side.

[0020] As one aspect of the waterproof equipment, The outer circumferential surface of the cylindrical body is formed in a tapered shape that gradually reduces in diameter from the first flange side toward the second flange side, The height of the first threaded portion from the outer surface of the cylindrical body gradually increases from the first flange side toward the second flange side so that the distance between the first threaded portion and the central axis of the cylindrical body is constant.

[0021] According to this configuration, the second threaded portion properly threads into the first threaded portion at both positions in the axial direction, close to the first flange and at positions distant from the first flange, and therefore the first flange and the second flange can be properly fixed regardless of the thickness of the wall body.

[0022] As one aspect of the waterproof equipment, the cylindrical body further has a non-threaded portion on an outer circumferential surface of which the first threaded portion is not formed, The first threaded portions and the non-threaded portions are arranged alternately in the circumferential direction.

[0023] According to this configuration, the cylindrical body has a non-threaded portion where the first threaded portion is not formed, thereby reducing the resistance that occurs when threading the second threaded portion onto the first threaded portion. Therefore, the operator can fix the first flange and the second flange to the wall body with a relatively small force. Furthermore, to facilitate adjustment of the axial length of the cylindrical body, for example, when the axial length of the cylindrical body is longer than necessary for the through-hole, a mark indicating the position to cut the cylindrical body can be attached to the non-threaded portion. Since the mark attached to the non-threaded portion is easier for the operator to see than when the mark is attached to the threaded portion, the operator can easily perform the cutting and adjustment work of the cylindrical body.

[0024] As one aspect of the waterproof equipment, The device further includes a support member that supports the cylindrical body on the inner surface of the through hole.

[0025] According to this configuration, until the first flange and the second flange are fixed to the wall body, the cylindrical body disposed in the through hole is positioned by the support body at the fixed position when the first flange and the second flange are fixed to the wall body. Therefore, the first flange and the second flange can be fixed to the wall body with the position of the cylindrical body relative to the through hole fixed. Therefore, an operator can easily perform the work of fixing the first flange and the second flange to the wall body.

[0026] As one aspect of the waterproof equipment, The support body includes a flexible plate that extends circumferentially from the outer peripheral surface of the cylindrical body and has a tip end that engages with the inner surface of the through hole in a bent state.

[0027] With this configuration, the cylindrical body can be supported on the inner surface of the through-hole by the elastic restoring force of the flexible plate. Furthermore, even if there is some variation in the size of the through-hole, the variation can be absorbed by the deformation of the flexible plate, and the cylindrical body can be appropriately positioned inside the through-hole.

[0028] As one aspect of the waterproof equipment, The housing further includes a waterproof seal disposed between the first wall surface and the first flange in a state surrounding the entire periphery of the through hole.

[0029] According to this configuration, it is possible to prevent water from entering the gap between the through hole and the cylindrical body.

[0030] As one aspect of the waterproof equipment, Further provided is an outwardly extending portion extending radially outward from the outer peripheral surface of the first flange over the entire circumference, The extending portion forms a seal accommodating space for accommodating an auxiliary seal between the extending portion and the first wall surface when the first flange is fixed to the first wall surface.

[0031] According to this configuration, after fixing the first flange to the first wall surface, the worker can install the auxiliary seal in the seal accommodating space, thereby preventing water from entering the gap between the through hole and the cylindrical body.

[0032] As one aspect of the waterproof equipment, The first screw portion has a lower screw portion located below the central axis of the cylindrical body, and a pair of upper screw portions located above the central axis of the cylindrical body, separated on both sides of the central axis.

[0033] According to this configuration, the worker can easily grasp the vertical orientation of the tubular body based on the formation of the first threaded portion. Therefore, when the tubular body connected to the first flange is placed in the through hole, the worker can more appropriately perform the construction of a waterproof structure by itself when tightening the second flange having the second threaded portion to the tubular body having the first threaded portion.

[0034] As one aspect of the waterproof equipment, The first screw portion has a lightening structure formed by removing a part of the second flange side.

[0035] According to this configuration, the first threaded portion has a lightening structure, which reduces the contact area when the second threaded portion is screwed into the first threaded portion, thereby reducing resistance, allowing the worker to fix the first flange and the second flange to the wall with a relatively small force.

[0036] Further features and advantages of the present invention will become more apparent from the following description of exemplary and non-limiting embodiments, which is given with reference to the drawings. [Brief explanation of the drawings]

[0037] [Figure 1] Cross-sectional view of the waterproof structure of the embodiment. [Figure 2] FIG. 1 is an exploded perspective view of a waterproof tool according to a first embodiment; [Figure 3] 3 is a side view of the first flange and the cylindrical body shown in FIG. [Figure 4] FIG. 3 is a perspective view of the second flange shown in FIG. 2; [Figure 5] FIG. 3 is a partially enlarged cross-sectional view of the cylindrical body shown in FIG. 2. [Figure 6] A view of the first flange shown in Figure 2 from the second space side. [Figure 7] A cross-sectional view of Figure 1 taken along VII-VII in the state where the waterproofing device shown in Figure 2 has been installed on the wall. [Figure 8] 3 shows the waterproofing device shown in FIG. 2 before being installed on the wall. [Figure 9] 3 is a diagram showing the waterproofing device shown in FIG. 2 being installed on a wall. [Figure 10] 3 shows the state after the waterproofing device shown in FIG. 2 has been installed on the wall. [Figure 11] FIG. 10 is an exploded perspective view of a waterproof tool according to a second embodiment. [Figure 12] 12 is a side view of the first flange and the cylindrical body shown in FIG. [Figure 13] 13-XIII cross-sectional view of Figure 1 with the waterproofing device shown in Figure 11 installed on the wall [Figure 14] Six-sided view of the waterproofing equipment shown in Figure 2 [Figure 15] Six-sided view of the waterproofing equipment shown in Figure 11 [Figure 16] FIG. 10 is an exploded perspective view of a waterproof tool according to a third embodiment. [Figure 17] 17 is a partially enlarged view of the cylindrical body shown in FIG. 16. [Figure 18] 17 is a view of the first flange shown in FIG. 16 from the second space side. [Figure 19] 17 is a view of the second flange shown in FIG. 16 from the second space side. DETAILED DESCRIPTION OF THE INVENTION

[0038] 1. Overview of waterproof structure As shown in FIG. 1 , the waterproof structure is provided in a gap space 101 between a through hole WH formed in a wall W that separates a first space S1 and a second space S2 and an elongated body 10 inserted through the through hole WH. By providing the waterproof structure in the gap space 101, water present in the first space S1 is prevented from passing through the gap space 101 and entering the second space S2. The wall W separates, for example, an interior space from an exterior space of a building. In this case, the first space S1 is the exterior space of the building, and the second space S2 is the interior space of the building. The water present in the first space S1 is, for example, rainwater.

[0039] In this embodiment, the wall W is a wall W of a dovecote that is installed in a structure such as a building to gather together in one place on the roof the cables and pipes that connect equipment installed on the roof to equipment installed in the interior space of the building. The first space S1 is an outdoor space, and the second space S2 is a space inside the dovecote. Because dovecotes are frequently exposed to wind and rain, applying the waterproof structure of this embodiment can effectively prevent water from entering the dovecote.

[0040] The wall body W has a first wall surface W1 arranged on the first space side L1, a second wall surface W2 arranged on the second space side L2, and a through hole WH. The through hole WH is formed across the first wall surface W1 and the second wall surface W2 so as to communicate between the first space S1 and the second space S2. An elongated body 10 is inserted through the through hole WH. In this embodiment, the first wall surface W1 is arranged outdoors, and the second wall surface W2 is arranged inside the dovecote. A cable or a pipe, which is an example of the elongated body 10, is inserted through the through hole WH.

[0041] As a waterproof structure, the gap space 101 is provided with a first flange 2 and a second flange 3 fixed to the wall body W, and a cylindrical body 4 held by the first flange 2 and the second flange 3. By being fixed to the wall body W, the first flange 2 and the second flange 3 hold the cylindrical body 4 in a state where it is positioned inside the through hole WH.

[0042] The cylindrical body 4 divides the gap space 101 into an arrangement space 102 through which the elongated body 10 is inserted and a non-arrangement space 103 in which the elongated body 10 is not arranged. In detail, the cylindrical body 4 divides the gap space 101 so that the non-arrangement space 103 is surrounded by the arrangement space 102 and the inner surface of the wall body W. According to this configuration, water traveling along the first wall surface W1 is more likely to flow into the non-arrangement space 103 than into the arrangement space 102. Therefore, by sealing the arrangement space 102 from the first space side L1, water can be efficiently prevented from flowing into the second space S2.

[0043] 1, the cylindrical body 4 is a cylindrical structure having a hollow portion. The arrangement space 102 is the hollow portion of the cylindrical body 4. The non-arrangement space 103 is a space surrounded by the outer peripheral surface 42 of the cylindrical body 4 and the inner surface of the through-hole WH.

[0044] To improve waterproof performance, the waterproof structure preferably includes a waterproof seal 8, the details of which will be described later. The waterproof seal 8 is a sealing member that blocks a path through which water may infiltrate from the first space S1 into the non-placement space 103. This path is likely to be formed between the first wall surface W1 and the first flange 2. Therefore, the waterproof seal 8 is disposed between the first wall surface W1 and the first flange 2 in a state in which it surrounds the entire circumference of the through hole WH.

[0045] In order to obtain higher waterproof performance than a waterproof structure that includes the waterproof seal 8, the waterproof structure preferably includes an auxiliary seal 9, which will be described in detail below, in addition to the waterproof seal 8. Like the waterproof seal 8, the auxiliary seal 9 is a sealing member that blocks a path through which water may infiltrate into the non-placement space 103. By providing the auxiliary seal 9 in addition to the waterproof seal 8, it is possible to doubly seal the path through which water may infiltrate from the first space S1 into the non-placement space 103. Because the waterproof seal 8 is disposed between the first wall surface W1 and the first flange 2, the auxiliary seal 9 is disposed on the first space side L1 relative to the waterproof seal 8, surrounding the entire periphery of the waterproof seal 8.

[0046] 2. Overview of waterproof gear In this embodiment, the waterproof structure is configured by a waterproof device 1 including a first flange 2, a second flange 3, and a tubular body 4, as shown in Figures 1, 2, and 11. Therefore, the waterproof device 1 is used to prevent water from entering a gap space 101 between a through hole WH formed in a wall body W and an elongated body 10 inserted into the through hole WH. The waterproof device 1 of this embodiment will be described below.

[0047] Here, for ease of explanation, directions will be referred to as follows in this specification. Specifically, the longitudinal direction of the cylindrical body 4 will be referred to as the axial direction L. In the axial direction L, the side closer to the first space S1 when the cylindrical body 4 is disposed in the through hole WH will be referred to as the first space side L1. The side opposite the first space side L1 and closer to the second space S2 when the cylindrical body 4 is disposed in the through hole WH will be referred to as the second space side L2. Furthermore, the direction perpendicular to the axial direction L will be referred to as the radial direction. In the radial direction, the side away from the central axis 4C of the cylindrical body 4 will be referred to as the radial outer side. The side closer to the central axis 4C of the cylindrical body 4, opposite the radial outer side, will be referred to as the radial inner side. Furthermore, when the cylindrical body 4 is disposed in the through hole WH, the direction along gravity will be referred to as the vertical direction Z. The direction perpendicular to the vertical direction Z may be referred to as the horizontal direction.

[0048] 2.1. Structure of the waterproof device of the first embodiment As shown in Figs. 2 and 14, the waterproof apparatus 1 comprises a first flange 2, a second flange 3, and a tubular body 4. The first flange 2 is connected to one side of the tubular body 4 along the axial direction L (in this example, the first space side L1). The second flange 3 is connected to the other side of the tubular body 4 along the axial direction L (in this example, the second space side L2). In this embodiment, the first flange 2 is integral with the tubular body 4. Meanwhile, the second flange 3 is detachably connected to the tubular body 4. With this configuration, there is no need to connect the first flange 2 to the tubular body 4, which reduces the workload of the worker who installs the waterproof structure (hereinafter, referred to as the worker).

[0049] The first flange 2 is a member fixed parallel to the first wall surface W1. As shown in Figures 2 and 3, the first flange 2 extends radially outward from the outer peripheral surface 42 of the cylindrical body 4. In this embodiment, the first flange 2 is fixed to the first wall surface W1 by frictional force generated by sandwiching the waterproof seal 8 and the wall W between the first flange 2 and the second flange 3 (described later).

[0050] In this embodiment, as shown in FIG. 1 , the first flange 2 is configured so that a portion of the tubular body 4 protrudes toward the first space side L1 to facilitate connecting a tubular cover C that covers the elongated body 10 to the waterproof apparatus 1. Specifically, the first flange 2 is disposed at a position that is a certain distance away from the edge of the end of the tubular body 4 along the axial direction L. According to this configuration, the cover C can be fitted to the portion of the tubular body 4 that protrudes from the first flange 2 toward the first space side L1. As a result, the portion of the elongated body 10 that is disposed on the first space side L1 relative to the wall W can be protected simply by fitting the cover C to the tubular body 4, thereby reducing the workload of the worker.

[0051] The second flange 3 is fixed parallel to the second wall surface W2. In this embodiment, as shown in FIGS. 2 and 4, the second flange 3 has a connecting portion 31 for connecting to the cylindrical body 4 and a flange portion 32 for sandwiching the wall body W. The connecting portion 31 is a cylindrical portion having a hollow portion capable of containing the outer peripheral surface 42 of the cylindrical body 4. In this embodiment, the connecting portion 31 is cylindrical. The flange portion 32 extends radially outward from the connecting portion 31. In this embodiment, the flange portion 32 is provided at a position closer to the first space side L1 in the connecting portion 31.

[0052] As will be described in detail later, in order to detachably connect the second flange 3 to the cylindrical body 4, the cylindrical body 4 has a connected portion 43 that connects with the connecting portion 31. In this embodiment, the connected portion 43 and the connecting portion 31 are each provided with a thread structure for connecting them to each other. As this thread structure, the connected portion 43 has a first thread portion 431, which will be described in detail later, and the connecting portion 31 has a second thread portion 311 that screws into the first thread portion 431. The second thread portion 311, as illustrated in FIG. 4, is formed on the inner circumferential surface of the connecting portion 31 that surrounds the hollow portion.

[0053] 2 is held by a first flange 2 and a second flange 3. The first flange 2 and the second flange 3 are fixed to the wall W, so that the cylindrical body 4 is disposed in the through hole WH along the axial direction L of the through hole WH. In this embodiment, the cylindrical body 4 is cylindrical.

[0054] 2, 3, and 5, the cylindrical body 4 has an inner peripheral surface 41 surrounding its hollow portion, an outer peripheral surface 42, and a coupled portion 43 that is detachably coupled to the coupling portion 31 of the second flange 3. In this embodiment, the coupled portion 43 is formed on the outer peripheral surface 42.

[0055] As described above with reference to FIG. 1 , the hollow portion surrounded by the inner circumferential surface 41 becomes the arrangement space 102 through which the elongated body 10 is inserted when the tubular body 4 is disposed in the through hole WH. As described above, water running down the first wall surface W1 tends to flow into the non-arrangement space 103, so sealing the non-arrangement space 103 can efficiently seal the gap space 101. However, when the elongated body 10 is inserted into the arrangement space 102, water may seep into the cover C and adhere to the portion of the elongated body 10 that is disposed on the first space side L1 relative to the wall W. Then, the water adhering to the elongated body 10 may flow along the elongated body 10 into the second space S2.

[0056] In order to prevent water adhering to the elongated body 10 from seeping down the elongated body 10 into the second space S2, the inner circumferential surface 41 has an inclined lower surface 411, as shown in Fig. 4. The inclined lower surface 411 is inclined upward from the first space side L1 toward the second space side L2 while being held by the first flange 2 fixed to the first wall surface W1 and the second flange 3 fixed to the second wall surface W2. That is, in this state, the inclined lower surface 411 is inclined upward from the first space S1 toward the second space S2.

[0057] The inclined lower surface 411 is formed on the lower half of the inner circumferential surface 41 of the cylindrical body 4 when the cylindrical body 4 is placed in the through hole WH. Preferably, the inclined lower surface 411 is formed directly below the central axis 4C. The inclined lower surface 411 is formed at a position between one end and the other end of the inner circumferential surface 41 in the axial direction L. The inclined lower surface 411 illustrated in FIG. 5 is formed from one end to the other end along the axial direction L.

[0058] In this embodiment, the inner circumferential surface 41 of the cylindrical body 4 is formed in a tapered shape that gradually reduces in diameter from the first flange 2 side toward the second flange 3 side. The entire circumference of the inner circumferential surface 41, including the inclined lower surface 411, is formed so that the diameter gradually reduces from the first flange 2 side toward the second flange 3 side. By doing so, when placing the cylindrical body 4 in the through hole WH, the inclined lower surface 411 can be configured without paying particular attention to the orientation of the cylindrical body 4 in the up-down direction Z, thereby reducing the workload of the worker.

[0059] The outer peripheral surface 42 is formed in a tapered shape with a diameter that gradually decreases from the first flange 2 side toward the second flange 3 side. A first threaded portion 431, which is an example of a connected portion 43, is formed on the outer peripheral surface 42.

[0060] In this embodiment, the first thread portion 431 is configured so that the distance LX from the central axis 4C of the cylindrical body 4 is constant. Specifically, the first thread portion 431 is configured so that the height from the outer peripheral surface 42 of the cylindrical body 4 gradually increases from the first flange 2 side toward the second flange 3 side. With this configuration, the second thread portion 311 can be engaged with the first thread portion 431 over the entire axial direction L. Here, the position serving as the reference for the height of the first thread portion 431 may be, for example, the crest of the thread or a position serving as the reference for the effective diameter. FIG. 5 shows a case where the position serving as the reference for the height of the first thread portion 431 is the crest of the thread.

[0061] The coupled portion 43 does not necessarily have to be formed around the entire circumference of the outer circumferential surface 42. In this embodiment, the coupled portion 43 has a non-threaded portion 432 where the first threaded portion 431 is not formed. With this configuration, when the tubular body 4 is manufactured from a material that can be molded using a metal mold or other form, the tubular body 4 can be appropriately molded. Examples of such materials include resin. The non-threaded portion 432 is formed on the outer circumferential surface 42 so as to be adjacent to the first threaded portion 431 in the circumferential direction. The non-threaded portion 432 is formed in a flat shape or a curved shape that follows the outer circumferential surface 42.

[0062] The non-threaded portions 432 are preferably formed at horizontal positions on the outer peripheral surface 42 so that the first threaded portions 431 are positioned on at least one of the upper side Z1 and the lower side Z2 when the cylindrical body 4 is placed in the through hole WH. In the example shown in Fig. 6, the first threaded portions 431 and the non-threaded portions 432 are formed alternately in the circumferential direction. With this configuration, even if water present in the first space S1 enters the non-placement space 103 and adheres to the outer peripheral surface 42, the first threaded portions 431 prevent this water from flowing along the outer peripheral surface 42 toward the second space S2.

[0063] 2.2. Preferred Configuration of the Waterproof Apparatus 1 of the First Embodiment Preferred configurations of the waterproof equipment 1 of the first embodiment will be described below with reference to Figures 2 to 6. Preferred configurations of the waterproof equipment 1 of the first embodiment shown in Figure 2 include the shape of the first flange 2, the support body 5, the auxiliary connection structure 6, the loosening prevention structure 7, the waterproof seal 8, the extension portion 21 for accommodating the auxiliary seal 9, and the cutting line 44 formed on the tubular body 4. These configurations may be applied to the waterproof equipment 1 alone or in combination.

[0064] [Shape of the first flange] The through hole WH for disposing the cylindrical body 4 may have slightly different inner diameters within a tolerance range. To accommodate through holes WH with such different inner diameters, the first flange 2 is formed in an elliptical shape when viewed in the axial direction L, as shown in FIG. 6 . In this embodiment, the first flange 2 has a major axis along the vertical direction Z when viewed in the axial direction L, when the cylindrical body 4 is disposed in the through hole WH. With this configuration, the gap that occurs between the inner surface of the through hole WH and the cylindrical body 4 in the vertical direction Z can be appropriately filled regardless of the inner diameter of the through hole WH.

[0065] In addition, the cylindrical body 4 is preferably connected to the elliptical first flange 2 so as to be eccentric to the lower side Z2 when viewed in the axial direction L. That is, the cylindrical body 4 and the first flange 2 are preferably connected so that the central axis 4C of the cylindrical body 4 is located on the lower side Z2 than the central axis of the elliptical first flange 2. According to this configuration, simply by arranging the first threaded portion 431 of the cylindrical body 4 so that it abuts against the lower surface of the through hole WH, it is possible to easily form the inclined lower surface 411 on the inner circumferential surface 41 of the cylindrical body 4 and appropriately fill the gap that occurs between the inner surface of the through hole WH and the upper part of the cylindrical body 4.

[0066] 2, the first flange 2 is provided with a sign 11 indicating the installation orientation during construction. In this embodiment, the sign 11 is configured as a combination of an arrow and a character string ("UP" in this example). During construction, the cylindrical body 4 is installed so that the direction of the arrow matches the direction indicated by the character string (upward in the vertical direction Z in this example), thereby allowing the inclined lower surface 411 to be configured appropriately.

[0067] [Support] The tubular body 4 is in an unstable state until the first flange 2 is fixed to the first wall surface W1. For this reason, the waterproof apparatus 1 is provided with a support 5 that stabilizes the position of the tubular body 4 until the first flange 2 is fixed to the first wall surface W1.

[0068] As shown in Fig. 7, the support body 5 supports the tubular body 4 on the inner surface of the through hole WH. Specifically, the support body 5 prevents the tubular body 4 from moving in the axial direction L and the radial direction when the tubular body 4 is disposed in the through hole WH. The support body 5 also prevents the tubular body 4 from rotating in the circumferential direction. In this embodiment, the waterproof equipment 1 has a flexible plate 51 as the support body 5.

[0069] The flexible plate 51 supports the cylindrical body 4, and in a bent state, its tip engages with the inner surface of the through hole WH. The overall dimension of the cylindrical body 4 and the flexible plate 51 along the horizontal direction sandwiching the central axis 4C of the cylindrical body 4 is larger than the dimension of the through hole WH along the horizontal direction. For example, if the through hole WH is circular when viewed in the axial direction L, the horizontal dimension of the through hole WH is its diameter. If the through hole WH has any other structure, the horizontal dimension is based on the portion that abuts against the support body 5 when the cylindrical body 4 is placed inside the through hole WH.

[0070] In this embodiment, the flexible plates 51 extend radially outward from the outer peripheral surface 42 of the cylindrical body 4. In the example shown in FIG. 7 , a pair of flexible plates 51 are provided on the outer peripheral surface 42 of the cylindrical body 4. One of the pair of flexible plates 51 is disposed on the opposite side of the other flexible plate 51 in the horizontal direction across the central axis 4C of the cylindrical body 4. The horizontal distance from the tip end of one flexible plate 51 to the tip end of the other flexible plate 51 is greater than the horizontal dimension of the through hole WH. Here, the base end of the flexible plate 51 is the portion of the flexible plate 51 that connects to the outer peripheral surface 42 of the cylindrical body 4. The tip end of the flexible plate 51 is the end opposite the base end of the flexible plate 51.

[0071] As shown in FIG. 3 , each of the pair of flexible plates 51 has a plate shape whose dimension in the axial direction L gradually decreases from the base end toward the tip end. According to this configuration, the flexible plate 51 flexes flexibly while appropriately maintaining the strength of the connection portion 31 with the cylindrical body 4. The flexible plate 51 is formed at a position along the horizontal direction on the outer peripheral surface 42 of the cylindrical body 4 when the cylindrical body 4 is disposed in the through hole WH. In the example shown in FIG. 6 , the flexible plate 51 is formed at a circumferential position corresponding to the non-threaded portion 432 on the outer peripheral surface 42 of the cylindrical body 4. Additionally, the pair of flexible plates 51 are disposed symmetrically with respect to the central axis 4C of the cylindrical body 4. According to this configuration, it is easy to dispose the cylindrical body 4 at the center position of the through hole WH in the horizontal direction. Furthermore, when disposed in the through hole WH, the tip end of each of the pair of flexible plates 51 abuts on a portion of the upper side Z1 of the through hole WH, rather than the center position of the through hole WH in the vertical direction Z. According to this configuration, the cylindrical body 4 is pressed downward Z2 by the pair of flexible plates 51. Therefore, it is possible to easily realize an arrangement in which the first threaded portion 431 of the cylindrical body 4 abuts against the lower surface of the through hole WH, and as a result, it is possible to easily form the inclined lower surface 411 on the inner circumferential surface 41 of the cylindrical body 4.

[0072] [Connection auxiliary structure] The connection support structure 6 is a structure for assisting the operation of connecting the second flange 3 to the tubular body 4. In this embodiment, the connecting portion 31 and the connected portion 43 are connected by a threaded structure, and therefore the connection support structure 6 is structured to facilitate rotation of the second flange 3 by making it easier for the second threaded portion 311 of the second flange 3 to thread into the first threaded portion 431. In the example shown in FIG. 4, the connection support structure 6 is a blade 61 extending radially outward from the connecting portion 31 of the second flange 3. By hooking their fingers on the blade 61, an operator can easily rotate the second flange 3 from a state in which the connecting portion 31 and the connected portion 43 begin to mesh. In the example shown in FIG. 4, multiple blades 61 are arranged at intervals in the circumferential direction as the connection support structure 6. With this configuration, the blade 61 is arranged in a position that is easy to grasp with the operator's fingers regardless of the position of the second flange 3 in the circumferential direction. As a result, the worker can easily rotate the second flange 3.

[0073] [Loosening prevention structure] The loosening prevention structure 7 is a structure for preventing loosening of the second screw portion 311 threaded into the first screw portion 431. In this embodiment, the loosening prevention structure 7 is a plate body 71 that protrudes from the second flange 3 toward the first space side L1, as shown in FIG. 4. The plate body 71 illustrated in FIG. 4 is formed so that the amount of protrusion toward the first space side L1 increases from the radially inner side toward the radially outer side. The plate body 71 deforms along the axial direction L, thereby generating a repulsive force that resists the deformation. This repulsive force acts on the first screw portion 431 and the second screw portion 311, preventing the first screw portion 431 and the second screw portion 311 from loosening.

[0074] It is preferable that a plurality of plate bodies 71 are provided. According to this configuration, a repulsive force corresponding to the number of plate bodies 71 can be applied to the first screw portion 431 and the second screw portion 311, making the first screw portion 431 and the second screw portion 311 less likely to loosen. Furthermore, it is preferable that the plurality of plate bodies 71 are arranged at equal intervals in the circumferential direction. According to this configuration, a repulsive force can be applied to the first screw portion 431 and the second screw portion 311 evenly in the circumferential direction, making the first screw portion 431 and the second screw portion 311 less likely to loosen.

[0075] The loosening prevention structure 7 may be used by an operator to visually confirm that the first flange 2 and the second flange 3 are properly fixed to the wall W. For this purpose, a plate 71, which is an example of the loosening prevention structure 7, includes a base end 71a connected to the second flange 3, a tip end 71b that is an end radially outward from the base end 71a and abuts against the second wall surface W2 when the second flange 3 is fixed to the second wall surface W2, and a plate portion 71c between the base end 71a and the tip end 71b. The plate portion 71c is inclined toward the first space side L1 as it extends radially outward, and the tip end 71b extends toward the first space side L1. The dimension of the tip end 71b of the plate 71 in the axial direction L is set to a size such that the plate portion 71c is approximately parallel to the second wall surface W2 when the first flange 2 and the second flange 3 are fixed to the wall W. With this configuration, by confirming that the plate portion 71c is approximately parallel to the second wall surface W2, the worker can determine that the first flange 2 and the second flange 3 are properly fixed to the wall body W. Note that "approximately parallel" means a state in which the plate portion 71c is exactly parallel to the object or a state in which the plate portion 71c is very slightly inclined.

[0076] 1 is provided in a space penetrating the second flange 3 in the axial direction L, with a base end 71a connected to a surface of the second flange 3 on the second space side L2, and a tip end 71b having a dimension in the axial direction L that is approximately the same as the thickness of the second flange 3 in the axial direction L. Therefore, when the plate portion 71c is approximately parallel to the second wall surface W2, the plate portion 71c and the surface of the second flange 3 on the second space side L2 are flush with each other, making it easy for the worker to determine whether the first flange 2 and the second flange 3 are properly fixed to the wall W. Of course, visual confirmation of the completion of installation using the change in the position of the plate portion 71c is merely a guide, and installation may be considered complete when there is no gap between the entire second flange 3 and the second wall surface W2.

[0077] [Cutting line] The dimension of the cylindrical body 4 in the axial direction L may be excessively large compared to the thickness of the wall body W. In such cases, it is preferable to adjust the dimension of the cylindrical body 4 in the axial direction L to match the thickness of the wall body W. The cutting lines 44 are portions that provide a guide for adjusting the dimension of the cylindrical body 4 in the axial direction L. In this embodiment, the cutting lines 44 are configured to have lower strength than other portions so that the cylindrical body 4 can be easily cut. The cutting lines 44 illustrated in FIGS. 2 and 3 are narrow grooves formed on the outer peripheral surface 42 of the cylindrical body 4. A plurality of cutting lines 44 are formed on the outer peripheral surface 42 of the cylindrical body 4. The cutting lines 44 are arranged at intervals in the axial direction L. In the example shown in FIGS. 2 and 3, the cutting lines 44 are formed in the non-threaded portion 432 in the circumferential direction.

[0078] [Waterproof seal] As described above, the waterproof seal 8 is disposed between the first wall surface W1 and the first flange 2 in a state in which it surrounds the entire periphery of the through hole WH. In this embodiment, the waterproof seal 8 is in close contact with the first flange 2 and the wall body W, and covers the gap leading from the first space side L1 to the non-placement space 103. This prevents water present in the first space S1 from entering the non-placement space 103.

[0079] The waterproof seal 8 is made of compressible resin, rubber, or the like. According to this configuration, when the wall W is sandwiched between the first flange 2 and the second flange 3 to fix the waterproof device 1 to the wall W, the waterproof seal 8 is pressed against the first flange 2. Then, the repulsive force against the pressing force applied to the waterproof seal 8 prevents the first threaded portion 431 and the second threaded portion 311 from loosening.

[0080] In this embodiment, the waterproof seal 8 is an annular member having an outer dimension, as viewed in the axial direction L, that is larger than the dimension of the through hole WH as viewed in the axial direction L, and having a notch 81 that leads to the hollow portion. The hollow portion is sized so that the cylindrical body 4 can be fitted therein. The waterproof seal 8 has a positioning portion 82 on its inner circumferential surface surrounding the hollow portion for determining the radial position of the waterproof seal 8 relative to the cylindrical body 4. In this embodiment, the positioning portion 82 protrudes radially inward from the inner circumferential surface 41 of the waterproof seal 8. The inner circumferential surface of the positioning portion 82 is configured to abut against the outer circumferential surface 42 of the cylindrical body 4 when the cylindrical body 4 is fitted in the hollow portion of the waterproof seal 8. The waterproof seal 8 illustrated in FIG. 2 has multiple positioning portions 82. The positioning portions 82 are spaced apart from one another in the circumferential direction. With this configuration, when the waterproof seal 8 is set in the cylindrical body 4, the position of the waterproof seal 8 relative to the cylindrical body 4 can be easily determined in the radial direction.

[0081] [Extension part] The extension portion 21 forms a seal accommodating space that accommodates the auxiliary seal 9. The auxiliary seal 9 covers the gap that leads from the first space side L1 to the non-placement space 103 when the first flange 2 is fixed to the wall body W. The auxiliary seal 9 is preferably made of a material that can be applied by flowing around the first flange 2 when the first flange 2 is fixed to the wall body W. For example, the auxiliary seal 9 is made of a caulking material, rubber foam, other sealing material, etc.

[0082] The extension portion 21 extends radially outward from the outer peripheral surface of the first flange 2 around the entire circumference. When the first flange 2 is fixed to the first wall surface W1, the extension portion 21 forms a seal accommodating space between the first wall surface W1 and the first extension portion 21 to accommodate the auxiliary seal 9. In this embodiment, as shown in FIGS. 2 and 3 , the extension portion 21 is configured by a portion of the outer peripheral surface of the first flange 2 that extends radially outward from an edge portion on the first space side L1. When the first flange 2 is fixed to the wall body W, the auxiliary seal 9 is accommodated in the seal accommodating space surrounded by the extension portion 21, the outer peripheral surface of the first flange 2, and the first wall surface W1. Preferably, the auxiliary seal 9 is accommodated around the entire circumference. With this configuration, the auxiliary seal 9 accommodated in the seal accommodating space can completely cover the gap leading from the first space S1 to the non-installation space 103.

[0083] In this embodiment, the auxiliary seal 9 is disposed radially outside the waterproof seal 8, surrounding the entire periphery of the through hole WH and the waterproof seal 8. With this configuration, the double seal using both the waterproof seal 8 and the auxiliary seal 9 can effectively prevent water from entering the non-placement space 103 from the first space S1.

[0084] 3. Waterproofing construction method A method for constructing the waterproof structure of this embodiment will be described with reference to Figures 8 to 10. The waterproof structure is constructed by fixing the waterproofing device 1 to a wall W so as to fill the gap space 101.

[0085] 8 to 10, the construction method of the waterproof structure includes the steps of fixing the waterproofing device 1 to a wall W and inserting the elongated body 10 into the hollow portion of the tubular body 4 of the waterproofing device 1. After these steps are completed, the arrangement space 102, which is the gap between the inner circumferential surface 41 of the tubular body 4 and the elongated body 10, is sealed as necessary.

[0086] The process of fixing the waterproof device 1 to the wall W includes the steps of inserting the tubular body 4 into the through hole WH (hereinafter referred to as the "insertion step"), adjusting the position of the waterproof device 1 in the axial direction L (hereinafter referred to as the "position adjustment step"), connecting the second flange 3 to the tubular body 4 (hereinafter referred to as the "connection step"), and fixing the waterproof device 1 to the wall W (hereinafter referred to as the "fixing step"). In this embodiment, the worker can perform the insertion step and position adjustment step on the first space side L1, for example, and the connection step and fixing step on the second space side L2. By going through these steps, the tubular body 4 is inserted into the through hole WH at an appropriate position and fixed to the wall W.

[0087] 8, in the insertion step, the cylindrical body 4 is positioned so as to be inserted into the through hole WH. The cylindrical body 4 is inserted into the through hole WH from the first space side L1, starting from the end on the second space side L2, and the cylindrical body 4 is inserted into the through hole WH. Here, the cylindrical body 4 is formed in a tapered shape that gradually reduces in diameter from the first space side L1 toward the second space side L2, and therefore the inclined lower surface 411 is positioned so as to be inclined upward from the first space S1 toward the second space S2.

[0088] In the insertion step, it is preferable that the worker inserts the cylindrical body 4 with the waterproof seal 8 attached into the through-hole WH. By doing so, in the position adjustment step described below, the waterproof seal 8 can be positioned at the gap leading from the first space S1 to the non-positioning space 103.

[0089] In the position adjustment step, the worker brings the first flange 2 close to the first wall surface W1 so that the first flange 2 is parallel to the first wall surface W1. Then, the worker positions the waterproof device 1 in a position where the support body 5 abuts against the inner surface of the through hole WH and the waterproof seal 8 is sandwiched between the first flange 2 and the first wall surface W1. In this way, the waterproof device 1 is stably positioned in the position where the first flange 2 will finally be fixed.

[0090] In the connecting step, as shown in FIG. 9 , the worker screws the second threaded portion 311 of the second flange 3 into the first threaded portion 431 of the cylindrical body 4 from the second space S2. The worker tightens the second flange 3 until the flange portion 32 of the second flange 3 is in close contact with the second wall surface W2. In this case, because the support body 5 stabilizes the position of the cylindrical body 4, there is no need for a worker other than the worker tightening the second flange 3 to hold the cylindrical body 4 from the first space side L1 relative to the wall W. As a result, the worker can install the waterproofing device 1 on the wall W by himself, improving work efficiency.

[0091] In the fixing step, the worker further tightens the second flange 3 from a state in which the second flange 3 abuts against the second wall surface W2, thereby sandwiching the wall body W between the first flange 2 and the second flange 3. The first flange 2 and the second flange 3 are fixed to the wall body W by the force with which the first flange 2 and the second flange 3 sandwich the wall body W.

[0092] In this embodiment, the waterproof seal 8 is already disposed between the first flange 2 and the wall body W in the insertion step. Therefore, it is preferable that the worker tighten the second flange 3 to the extent that a repulsive force along the axial direction L is generated in the waterproof seal 8 sandwiched between the first flange 2 and the wall body W. In this manner, the waterproof seal 8 is pressed against the wall body W by the first flange 2, so that it adheres closely to both the first flange 2 and the wall body W. This allows the waterproof seal 8 to properly close the gap leading from the first space side L1 to the non-installation space 103. In addition, the repulsive force generated in the waterproof seal 8 prevents the first threaded portion 431 and the second threaded portion 311 from loosening, as described above.

[0093] Additionally, in the fixing step, it is preferable to tighten the second flange 3 to an extent that the loosening prevention structure 7 of the second flange 3 acts. In this embodiment, the second flange 3 is tightened until the plate body 71 serving as the loosening prevention structure 7 is deformed to a certain degree. In the example shown in FIG. 10, the plate body 71 is deformed until the plate portion 71c is parallel to the second flange 3. After tightening and fixing the second flange 3 to the wall body W, the fixing of the second flange 3 to the wall body W may be reinforced using fastening parts such as screws.

[0094] In this embodiment, after the waterproofing device 1 is fixed to the wall W, the auxiliary seal 9 is accommodated in the seal accommodating space formed by the extension portion 21, the outer peripheral surface of the first flange 2, and the first wall surface W1. For example, an operator applies the auxiliary seal 9 in a fluid state to the seal accommodating space. After this, after a certain period of time has passed, the auxiliary seal 9 solidifies while being accommodated in the seal accommodating space so as to integrally cover the first wall surface W1, the outer peripheral surface 42 of the first flange 2, and the surface of the extension portion 21 on the second space side L2.

[0095] Thereafter, although not shown, the gap between the hollow portion of the cylindrical body 4 and the elongated body 10, i.e., the arrangement space 102, is sealed as necessary. Examples of sealing materials for sealing the arrangement space 102 include caulking material, rubber, and other sealing materials.

[0096] 4. Waterproofing device of the second embodiment The first flange 2 and the cylindrical body 4 may be integrally formed as described in the first embodiment, or may be formed as separate members. The second embodiment differs from the first embodiment in that the first flange 2 is detachably attached to the cylindrical body 4, as shown in FIG. 11 . Furthermore, as described above, it is preferable to maintain the position of the cylindrical body 4 in a stable state when the first flange 2 and the second flange 3 are not fixed to the wall W. The second embodiment differs from the first embodiment in that the support 5 includes, instead of the flexible plate 51, a hook 52 that can maintain the position of the cylindrical body 4 in a state that is at least as stable as the flexible plate 51. Hereinafter, only the main differences between the second embodiment and the first embodiment will be described, and a description of the configuration common to the second embodiment and the first embodiment will be omitted.

[0097] As shown in FIG. 12 , the hook 52 has a shaft 521 that prevents the cylindrical body 4 from moving in the radial direction when the cylindrical body 4 is placed in the through hole WH, and a locking portion 522 that prevents the cylindrical body 4 from moving in the axial direction L. The shaft 521 extends in the axial direction L. The shaft 521 is configured to be deformable radially inward when pressed from the radially outer side. In this embodiment, the shaft 521 protrudes from the first flange 2 in the axial direction L, and its tip deforms radially inward from its base end connected to the first flange 2. The locking portion 522 extends radially outward from the tip of the shaft 521. When the locking portion 522 presses against the inner circumferential surface 41 of the through hole WH, frictional force generated between the locking portion 522 and the inner circumferential surface 41 of the through hole WH prevents the cylindrical body 4 from moving in the axial direction L and rotating in the circumferential direction.

[0098] As shown in FIG. 13 , the locking portion 522 is formed to abut against the inner circumferential surface 41 of the through hole WH when the cylindrical body 4 is disposed inside the through hole WH. As shown in FIG. 12 , the locking portion 522 has an abutment surface 523 that abuts against the inner circumferential surface 41 of the through hole WH, and an inclined surface 524 that extends in the axial direction L from the edge of the abutment surface 523 on the second space side L2. The inclined surface 524 inclines radially outward as it moves from the second space side L2 to the first space side L1. When the cylindrical body 4 is disposed inside the through hole WH, the locking portion 522 is disposed in a state in which the abutment surface 523 presses against the inner circumferential surface 41 of the through hole WH. According to this configuration, when the cylindrical body 4 is disposed inside the through hole WH, the connection portion between the abutment surface 523 and the inclined surface 524 is engaged with the inner circumferential surface 41 of the cylindrical body 4. Therefore, even if the cylindrical body 4 attempts to move toward the first space side L1, the connecting portion prevents the cylindrical body 4 from unintentionally moving toward the first space side L1.

[0099] In this embodiment, the multiple hooks 52 are evenly spaced in the circumferential direction. Furthermore, at least one pair of hooks 52 is formed so as to be horizontally symmetrical with respect to the central axis 4C of the cylindrical body 4 when the first flange 2 is attached to the cylindrical body 4. The distance from the tip of one of the pair of hooks 52 to the tip of the other hook 52 is greater than the horizontal dimension of the through hole WH. According to this configuration, when the cylindrical body 4 is disposed inside the through hole WH, the pair of hooks 52 deform appropriately, thereby aligning the central axis 4C of the cylindrical body 4 at the center of the through hole WH. When the central axis 4C of the cylindrical body 4 is to be positioned horizontally eccentrically with respect to the central axis 4C of the through hole WH, the pair of hooks 52 may be positioned appropriately so that the central axis 4C of the cylindrical body 4 is positioned at the target position.

[0100] Additionally, in this embodiment, a hook 52 is provided that is positioned on the lower side Z2 of the cylindrical body 4 when the cylindrical body 4 is placed inside the through hole WH. Hereinafter, the hook 52 that is positioned on the lower side Z2 of the cylindrical body 4 will be referred to as a support hook. The tip of the support hook is set so that the cylindrical body 4 is positioned directly below the central axis 4C when the cylindrical body 4 is placed inside the through hole WH. According to this configuration, because the support hook supports the cylindrical body 4 from the lower side Z2, the position of the cylindrical body 4 with respect to the through hole WH is likely to be stable until the first flange 2 and the second flange 3 are fixed to the wall W.

[0101] 5. Waterproofing device of the third embodiment The specific structures of the first threaded portion 431 formed on the cylindrical body 4 and the second threaded portion 311 formed on the second flange 3 are not limited to those described in the first and second embodiments, and other structures may be adopted. In the third embodiment, as shown in Fig. 16, the first threaded portion 431 adopts a structure in which it is divided into three parts in the circumferential direction. In addition, the second threaded portion 311 adopts a structure in which a so-called triple-start thread is partially machined. Hereinafter, only the main differences between the third embodiment and the first embodiment will be described, and a description of the configuration common to the third embodiment and the first embodiment will be omitted.

[0102] The first thread portion 431 of this embodiment is divided into three portions per revolution of the spiral: two provided on the upper side Z1 of the central axis 4C of the cylindrical body 4, and one provided on the lower side Z2 of the central axis 4C of the cylindrical body 4. Hereinafter, the first thread portion 431 provided on the upper side Z1 of the central axis 4C will be referred to as the "upper thread portion N1," and the first thread portion 431 provided on the lower side Z2 of the central axis 4C will be referred to as the "lower thread portion N2."

[0103] The pair of upper threaded portions N1 on the upper side Z1 of the central axis 4C are provided separately on both sides of the central axis 4C, as shown in Fig. 18. The pair of upper threaded portions N1 are arranged symmetrically with respect to a plane along the up-down direction Z that passes through the central axis 4C. The pair of upper threaded portions N1 are formed so that the outer surfaces on both sides in the width direction of each of the pair of upper threaded portions N1 are aligned along the up-down direction Z when viewed in the axial direction L.

[0104] The lower screw portion N2, which is disposed below the central axis 4C on the Z2 side, is formed symmetrically with respect to a plane passing through the central axis 4C in the vertical direction Z. The shape of the lower screw portion N2 as viewed in the axial direction L may be the same as that of the first and second embodiments.

[0105] 17, the first screw portion 431 is formed by removing a portion of the second flange 3 side. By providing the first screw portion 431 with such a removed structure, the area of ​​the surface (hereinafter referred to as the "first surface α") that comes into contact with the second screw portion 311 when the second screw portion 311 is screwed thereto is reduced. This reduces the resistance that occurs when screwing the second screw portion 311 into the first screw portion 431. Therefore, compared to when the first screw portion 431 has a thread structure without any removed part, it is easier for the worker to screw the second screw portion 311 into the first screw portion 431.

[0106] As shown in FIG. 17 , the first threaded portion 431 has remaining portions 431L that remain unremoved. The remaining portions 431L are formed in multiple locations in the circumferential direction. In this embodiment, the remaining portions 431L are formed in three locations per first threaded portion 431: both circumferential ends and a central portion. The remaining portions 431L function as ribs, and can reduce the strength reduction of the first threaded portion 431 while reducing the thickness of the first threaded portion 431. This makes the first threaded portion 431 less likely to break when the second threaded portion 311 is threaded into the first threaded portion 431 or after installation.

[0107] The first screw portion 431 has a lightening structure only partially on the second flange 3 side, and the first flange 2 side is not lightened. Therefore, the surface of the first screw portion 431 opposite to the first surface α (the surface that does not come into contact with the second screw portion 311 when the second screw portion 311 is screwed thereto; hereinafter, referred to as the "second surface β") is relatively large. Therefore, after the operation of screwing the second screw portion 311 into the first screw portion 431 is completed, the contact area between the first screw portion 431 and the second screw portion 311 becomes relatively large. Specifically, the area of ​​the second surface β is larger than the area of ​​the first surface α, and is preferably approximately 3 to 10 times the area of ​​the first surface α. Therefore, resistance that occurs when the second screw portion 311 tries to be removed from the first screw portion 431 is likely to be large. This makes it easier to ensure that the second screw portion 311 is less likely to come off the first screw portion 431 after the worker has completed the work of screwing the second screw portion 311 into the first screw portion 431.

[0108] The second threaded portion 311 of this embodiment is formed based on a triple-start thread structure. The three threaded portions that make up this triple-start thread are not formed as a single unit, but are divided into multiple parts. In this example, as shown in FIG. 19, the second threaded portion 311 is formed by cutting out the centers of the three threaded portions that make up the triple-start thread, resulting in a total of six threaded portions.

[0109] 6. Other embodiments Finally, other embodiments of the waterproof structure and waterproof equipment 1 according to the present invention will be described. Note that the configurations disclosed in the following embodiments can also be applied in combination with the configurations disclosed in other embodiments, provided that no contradictions arise.

[0110] (1) In the present embodiment, the cylindrical body 4 is described as being formed in a tapered shape with a diameter that gradually decreases from the first space side L1 toward the second space side L2. However, it is sufficient that at least the lower half of the inner circumferential surface 41 of the cylindrical body 4 is the inclined lower surface 411, and the upper half of the cylindrical body 4 may be formed in a cylindrical shape without an inclination.

[0111] (2) In the present embodiment, the first flange 2 and the second flange 3 are fixed to the wall body W by sandwiching the waterproof seal 8 and the wall body W between the first flange 2 and the second flange 3. However, the waterproof seal 8 is not an essential component for fixing the first flange 2 and the second flange 3 to the wall body W. In addition, the first flange 2 and the second flange 3 may be fixed to the wall body W by fastening parts such as screws or by an engagement structure formed between the first flange 2 and the second flange 3 and the wall body W. Furthermore, the first flange 2 and the second flange 3 may be fixed to the wall body W by adhering them to the wall body W with an adhesive or the like.

[0112] (3) In the present embodiment, it has been described that the first threaded portion 431 is preferably positioned on at least one of the upper side Z1 and the lower side Z2 when the cylindrical body 4 is positioned in the through hole WH. However, the non-threaded portion 432 may be positioned on the upper side Z1 or the lower side Z2 when the cylindrical body 4 is positioned in the through hole WH.

[0113] (4) In the present embodiment, the auxiliary connection structure 6 is described as a plate-shaped blade 61 extending radially outward from the outer circumferential surface 42 of the connecting portion 31. However, the auxiliary connection structure 6 may be any structure that makes it easier for an operator to hold the connecting portion 31. Therefore, for example, the auxiliary connection structure 6 may be an unevenness formed on the outer circumferential surface of the connecting portion 31, or one or more notches.

[0114] (5) In this embodiment, the loosening prevention structure 7 is described as one or more plates 71 protruding from the second flange 3. However, the loosening prevention structure 7 may be configured such that the second flange 3 itself curves toward the first space side L1 as it moves radially outward from the center, and the second flange 3 receives force from the first space side L1, causing the second flange 3 to deform flat. According to this configuration, when the wall W is sandwiched between the first flange 2 and the second flange 3, a repulsive force generated by the deformation of the second flange 3 is transmitted to the first threaded portion 431 and the second threaded portion 311. As a result, this repulsive force prevents the first threaded portion 431 and the second threaded portion 311 from loosening. Alternatively, instead of using the loosening prevention structure 7, the first threaded portion 431 and the second threaded portion 311 may be prevented from loosening by applying an anti-loosening agent to the first threaded portion 431 and the second threaded portion 311. According to this configuration, there is no need to provide a structure for preventing the first threaded portion 431 and the second threaded portion 311, and therefore the overall structure of the waterproof equipment 1 is simplified.

[0115] (6) In this embodiment, it has been described that the auxiliary seal 9 is preferably made of a material that is fluid when installed. However, the auxiliary seal 9 is not limited to a material that is fluid when installed, and may be installed around the first flange 2 while the first flange 2 is fixed to the wall body W. For example, the auxiliary seal 9 may be made of a sealing member made of resin or rubber.

[0116] (7) In the present embodiment, the first flange 2 is connected to the cylindrical body 4 so as to be perpendicular to the central axis 4C of the cylindrical body 4. However, the cylindrical body 4 may be disposed so that its central axis 4C is inclined, and the first flange 2 may be connected to the cylindrical body 4 so as to be inclined with respect to the central axis 4C of the cylindrical body 4.

[0117] (8) In this embodiment, the construction method of the waterproof structure has been described as including the steps of fixing the waterproof device 1 to the wall W and inserting the elongated body 10 into the hollow portion of the tubular body 4 of the waterproof device 1. Here, the order in which the steps of fixing the waterproof device 1 to the wall W and inserting the elongated body 10 into the hollow portion of the tubular body 4 of the waterproof device 1 are performed is not limited to the order described.

[0118] (9) With regard to other configurations, it should be understood that the embodiments disclosed in this specification are illustrative in all respects and that the scope of the present invention is not limited thereby. Those skilled in the art will easily understand that appropriate modifications are possible without departing from the spirit of the present invention. Therefore, other embodiments modified without departing from the spirit of the present invention are naturally included in the scope of the present invention. [Industrial Applicability]

[0119] The technology disclosed herein can be used in a waterproof structure provided in the gap between a through hole formed in a wall body and an elongated body inserted into the through hole, and in a waterproofing device used in the waterproof structure. [Explanation of symbols]

[0120] 1: Waterproof gear 2: First flange 3: Second flange 4: Cylindrical body 4C: Central axis 5:Support 8: Waterproof seal 9: Auxiliary seal 10: Long body 11:Sign 21: Extended part 41: Inner surface 42: Outer surface 51: Flexible plate 101: Interstitial Space 311: Second screw section 411: Slanted bottom surface 431: First screw section α: First page β :Second side N1: Upper thread N2: Lower thread 431L: Remaining parts 432: Non-threaded part 521: Axis L: Axial direction S1: 1st space S2:Second space W: Wall W1: First wall W2: Second wall WH: Through hole

Claims

1. A waterproof structure provided in a gap space between a through hole formed in a wall body that separates a first space and a second space and an elongated body that is inserted into the through hole, a first flange fixed parallel to a first wall surface of the wall body on the first space side; a second flange fixed parallel to a second wall surface of the wall body on the second space side; a cylindrical body that is disposed in the through hole along the axial direction of the through hole and is held by the first flange and the second flange, The cylindrical body has a waterproof structure in which an inner circumferential surface surrounding a hollow portion has an inclined lower surface that slopes upward as it goes from the first space to the second space.

2. a waterproof seal disposed between the first wall surface and the first flange in a state surrounding the entire periphery of the through hole; The waterproof structure according to claim 1 , further comprising: an auxiliary seal arranged on the first space side of the waterproof seal in a state surrounding the waterproof seal over its entire periphery.

3. A waterproofing device for waterproofing a gap space between a through hole formed in a wall body that separates a first space and a second space and an elongated body that is inserted into the through hole, a first flange fixed parallel to a first wall surface of the wall body on the first space side; a second flange fixed parallel to a second wall surface of the wall body on the second space side; a cylindrical body disposed in the through hole along the axial direction of the through hole, The tubular body is held by the first flange fixed to the first wall surface and the second flange fixed to the second wall surface, and the inner surface surrounding the hollow portion has an inclined lower surface that slopes upward as it moves from the first flange side to the second flange side.

4. The waterproofing equipment according to claim 3, wherein the inner peripheral surface of the cylindrical body is formed in a tapered shape that gradually reduces in diameter from the first flange side toward the second flange side.

5. the cylindrical body has a first thread portion on an outer circumferential surface, The waterproof equipment according to claim 3 , wherein the second flange has a second threaded portion that screws into the first threaded portion.

6. The outer circumferential surface of the cylindrical body is formed in a tapered shape that gradually reduces in diameter from the first flange side toward the second flange side, 6. The waterproofing device according to claim 5, wherein the height of the first threaded portion from the outer surface of the cylindrical body gradually increases from the first flange side toward the second flange side so that the distance of the first threaded portion from the central axis of the cylindrical body is constant.

7. the cylindrical body further has a non-threaded portion on the outer circumferential surface where the first threaded portion is not formed, The waterproof equipment according to claim 5 , wherein the first threaded portions and the non-threaded portions are arranged alternately in the circumferential direction.

8. The waterproofing equipment according to claim 3 , further comprising a support member for supporting the cylindrical body on the inner surface of the through hole.

9. The waterproofing equipment according to claim 8 , wherein the support has a tip portion that engages with the inner surface of the through hole in a bent state.

10. The waterproof equipment according to claim 3 , further comprising a waterproof seal disposed between the first wall surface and the first flange in a state surrounding the entire periphery of the through hole.

11. an extending portion extending radially outward from the outer circumferential surface of the first flange over the entire circumference, The waterproofing equipment according to claim 3 , wherein the extending portion forms a seal accommodating space for accommodating an auxiliary seal between the extending portion and the first wall surface when the first flange is fixed to the first wall surface.

12. The waterproofing device according to claim 5, wherein the first threaded portion has a lower threaded portion provided below the central axis of the tubular body, and a pair of upper threaded portions provided above the central axis of the tubular body, separated on both sides of the central axis.

13. The waterproofing equipment according to claim 5, wherein the first threaded portion has a lightening structure formed by lightening a part of the second flange side.

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