Waterproof device

Abstract

To provide a waterproof device that improves workability when fitting into a pipeline port.SOLUTION: A waterproof device 100 includes: a packing body 101 made of an elastic body having a cylinder sized to be fitted in a gap between an inner peripheral surface P22 of a conduit port P11 and a cable C10; a slit that allows the cable C10 to be inserted into the cylinder of the packing body 101; and a hollow chamber 120 that expands a peripheral wall 110 of the cylinder of the packing body 101 by filling the inside with a filler. In the peripheral wall 110, in an outer peripheral portion 111, which is an outer peripheral side of the cylinder of the packing body 101, a first portion provided in a state extending in a circumferential direction of the cylinder of the packing body 101 and a second portion 111c provided in a state extending along the first portion and extending outward from the first portion are arranged in an axial direction of the cylinder of the packing body 101, and a first sealing material is provided along the outer peripheral surface of the first portion, which is the surface on the outer peripheral side.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present technology relates to waterproof devices. [Background technology]

[0002] Conventionally, a known underground cable installation structure for cables such as power transmission cables and communication cables involves connecting multiple manhole chambers with hollow conduits through which the cables are passed. However, conduits can be damaged during installation or other underground construction work, and cracks that result can serve as entry points for groundwater to seep into the conduits. Furthermore, gaps between the end bells, which are the openings of the joints connecting the conduits, and the conduits themselves can also serve as entry points for groundwater to seep into the conduits. In these cases, water may seep into the manhole chamber through the conduit opening. To prevent this, waterproofing devices are sometimes installed at the conduit openings facing the manhole chamber.

[0003] For example, Patent Document 1 discloses a technology for sealing a conduit opening by fitting a tubular waterproofing device into the gap between multiple twisted cables and the inner circumferential surface of the conduit opening. The waterproofing device includes a packing body made of an elastic material, which has a cutting portion that can be attached from the outer circumferential side of the cable and a hollow chamber in the circumferential direction, which is filled with a filler material. When the hollow chamber is filled with the filler material, the packing body expands radially, causing the outer circumferential surface of the packing body to press against the inner circumferential surface of the conduit, creating a tight seal. This allows for a good seal at the conduit opening.

[0004] Here, an adhesive layer made of water-swelling rubber is attached to the outer peripheral surface near the cut portion and to the outer peripheral surface corresponding to the injection tube for injecting the filler. This adhesive layer has flexibility and adhesiveness, and is configured to improve the waterproofing of the waterproof device by increasing the sealing performance of the gap between the outer peripheral surface of the packing body and the inner peripheral surface of the pipeline. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 2849069 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the technology disclosed in Patent Document 1, when fitting a waterproofing device provided with an adhesive layer for improving waterproofing into a pipe opening, it is possible that the adhesive layer may get caught on the inner surface of the pipe, and there is a need to improve the ease of fitting.

[0007] The present invention was devised in consideration of these points, and the problem that the present invention aims to solve is to provide a waterproofing device that achieves both further improvement in waterproofing and suppression of a decrease in workability when fitting it into a pipe opening. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides the following: First, a first invention is a waterproofing device capable of realizing a fitted state in a conduit opening of a conduit into which a cable is inserted, comprising: a packing body made of an elastic body and forming a tube sized to be fitted into a gap between the inner circumferential surface of the conduit opening and the cable; a slit that divides the peripheral wall of the tube of the packing body in the circumferential direction into two opposing edge portions, thereby allowing the cable to be inserted into the tube of the packing body through the space between the edge portions; and a hollow structure provided inside the peripheral wall that is filled with a filler material to expand the peripheral wall. and a hollow chamber, and in the peripheral portion of the peripheral wall that is on the outer periphery of the tube of the packing body, a first portion extending in the circumferential direction and a second portion extending along the first portion and projecting outward more than the first portion are arranged side by side in the axial direction of the tube of the packing body, and in the first portion, a sealing material is arranged along the outer peripheral surface that is the surface on the outer periphery side, the sealing material having an inner sealing surface facing the outer peripheral surface and an outer sealing surface that is the surface opposite the inner sealing surface.

[0009] According to a first aspect of the present invention, the waterproofing device can seal the conduit opening by fitting the packing body into the gap between the inner circumferential surface of the conduit opening and the cable, and then filling the hollow chamber with a filler to expand the circumferential wall of the packing body. Here, a sealant is disposed along the outer circumferential surface of a first portion of the circumferential wall of the packing body. The second portion is configured to protrude outward more than the first portion, so that when the waterproofing device is fitted into the conduit opening, the play between the second portion and the inner circumferential surface of the conduit opening is smaller than the play between the first portion and the inner circumferential surface of the conduit opening. Therefore, when the waterproofing device is fitted into the conduit opening, the second portion can be aligned with respect to the inner circumferential surface of the conduit opening with higher positional accuracy than when the first portion is fitted into the conduit opening. This reduces the unevenness of play between the first portion and the inner peripheral surface of the pipe opening, thereby reducing the risk of the sealant getting caught on the inner peripheral surface of the pipe opening. Furthermore, according to the first invention, the sealant in the first portion, where the peripheral wall is expanded, can function as a waterproofing material. Therefore, according to the first invention, it is possible to provide a waterproofing device that achieves both further improved waterproofing and minimizes a decrease in workability when fitting the waterproofing device into the pipe opening.

[0010] A second aspect of the present invention is the waterproofing device according to the first aspect of the present invention, wherein the second portion is provided in a state of projecting outward beyond the outer surface of the seal.

[0011] According to the second aspect of the present invention, the second portion of the waterproofing device protrudes outward from the outer seal surface, making it even less likely that the seal material disposed in the first portion will get caught on the inner circumferential surface of the pipe opening, thereby further improving the ease of fitting the waterproofing device into the pipe opening.

[0012] The third invention is a waterproofing device according to the first invention, wherein the sealing material is an elastic body that can achieve a compressed state in which it is elastically contracted in its thickness direction, and in a natural state in which no external force is applied, the outer surface of the seal protrudes outward beyond the second portion, and in the fitted state, the sealing material is in the compressed state and contacts the inner surface of the pipe opening.

[0013] According to the third aspect of the present invention, when the waterproofing device is fitted into the pipe opening, the sealing material that protrudes outward from the second portion is pulled axially against the inner circumferential surface of the pipe, and is inserted into the pipe in a state in which it is elastically contracted in the thickness direction. This allows the sealing material to conform to the inner circumferential surface of the pipe and be contracted in the thickness direction, making it less likely to peel off. Furthermore, according to the third aspect of the present invention, even if the pipe opening deforms and its inner diameter changes when the waterproofing device is fitted into the pipe opening, the sealing material elastically deforms in the thickness direction. This allows the pipe opening to be appropriately sealed. Therefore, according to the third aspect of the present invention, a waterproofing device can be provided that achieves both improved waterproofing when the pipe opening deforms and reduced workability when fitting into the pipe opening.

[0014] A fourth invention is a waterproofing device according to any one of the first to third inventions, wherein the first part, the second part, and the sealing material are arranged to surround the entire circumference of the outer peripheral part.

[0015] According to the fourth invention, the waterproofing device is arranged so that the first part, the second part, and the sealing material surround the entire outer periphery of the packing body, so that the pipe opening is kept sealed all around.

[0016] A fifth aspect of the present invention is the waterproofing device according to the fourth aspect of the present invention, wherein the sealing material is wrapped around the entire outer periphery of the outer periphery, with the starting end and the ending end coinciding with each other.

[0017] According to the fifth aspect of the present invention, the waterproofing device can be configured so that the sealing material surrounds the entire outer periphery of the packing body simply by fitting the ring of the sealing material onto the outer periphery of the packing body.

[0018] The sixth invention is a waterproofing device according to any one of the first to fifth inventions, wherein the second part is arranged to sandwich the first part from the axial direction, thereby forming a groove together with the first part.

[0019] According to a sixth aspect of the present invention, the waterproofing device has a second portion that axially sandwiches the first portion, thereby forming a groove together with the first portion. In this way, when the waterproofing device is fitted into or removed from the pipe opening, the outwardly projecting second portion makes it difficult for the seal material provided in the groove to come off.

[0020] The seventh invention is a waterproofing device according to any one of the first to sixth inventions, in which a lip extending along the second portion and projecting outward beyond the second portion is arranged in a line so as to cover the second portion from the outside in the axial direction of the tube of the packing body.

[0021] According to the seventh aspect of the present invention, in the fitted state, the lip of the waterproofing device covers the second portion from the outside in the axial direction of the tube of the packing body, thereby improving the function of the waterproofing device as a waterproofing material.

[0022] The eighth invention is a waterproofing device according to any one of the first to seventh inventions, wherein the sealing material is a double-sided seal having adhesive surfaces on both the inner and outer surfaces of the seal.

[0023] According to the eighth aspect of the present invention, the waterproofing device has a double-sided sealant that adheres to both the inner circumferential surface of the pipe opening and the first portion of the packing body, thereby keeping the pipe opening sealed. [Effects of the Invention]

[0024] By virtue of the above-described configurations, the present invention can provide a waterproofing device that achieves both improved waterproofing and suppresses a decrease in workability when fitting the waterproofing device into a pipe opening. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a perspective view of a waterproof device 100 according to a first embodiment. [Figure 2] FIG. 2 is a front view of the waterproof device 100 of FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. [Figure 4] FIG. 4 is an enlarged view of part IV in FIG. 3. [Figure 5] FIG. 4 is a cross-sectional view taken along the line VV in FIG. 3. [Figure 6] FIG. 10 is a front view of a waterproof device 200 according to a second embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. [Figure 8] FIG. 8 is an enlarged view of part VIII in FIG. 7. [Figure 9] 8, showing a state in which the hollow chamber 220 is filled with the filler material F10. [Figure 10] FIG. 10 is a front view of a waterproof device 300 according to a third embodiment. [Figure 11] FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. [Figure 12] FIG. 12 is an enlarged view of part XII of FIG. 11, in which the configuration shown in virtual lines is shown in solid lines. [Figure 13] FIG. 13 is an enlarged view of a portion XIII in FIG. [Figure 14] FIG. 1 is a front view of a waterproof device 400 according to a modified embodiment of the waterproof device 100 according to the first embodiment. [Figure 15] FIG. 10 is a front view of a waterproof device 500 according to a modified embodiment of the waterproof device 300 according to the third embodiment. [Figure 16] FIG. 10 is a front view of a waterproof device 600 according to a modified embodiment of the waterproof device 300 according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0026] A waterproofing device 100 according to a first embodiment of the present invention can be fitted into a conduit opening P11 of a conduit P10 into which three cables C10 are inserted in a bundled state, as shown in Fig. 1. Details of the waterproofing device 100 according to the present invention will be described below together with the conduit P10 using the drawings.

[0027] <Pipeline configuration> The conduit P10 is formed by disposing a hollow cylindrical power cable protection pipe P20 underground and inserting a cable C10, such as a power transmission cable or a communication cable, into the power cable protection pipe P20. Both end portions P21 of the power cable protection pipe P20 open to manhole chambers (not shown), thereby forming conduit entrances P11 of the conduit P10. The power cable protection pipe P20 is made of a material suitable for underground disposition (in this embodiment, for example, plastic such as FRP).

[0028] <Pipeline details> The conduit P10 is a power cable protection pipe P20 used when laying a cable C10 such as a power transmission cable or a communication cable underground. Here, the power cable protection pipe P20 has a hollow tubular shape, with both end portions P21 connected to respective manhole chambers (not shown). The tubular shape is such that an inner circumferential surface P22 is in close contact with the second portion 111C provided in the waterproofing device according to each embodiment of the present invention.

[0029] <Waterproofing device according to the first embodiment> The waterproofing device 100 according to the first embodiment of the present invention is fitted into a conduit opening P11 of a conduit P10 into which a cable C10 is inserted. Specifically, when the waterproofing device 100 is fitted into the conduit opening P11, a packing body 101 is fitted into a gap G10 between the cable C10 and an inner circumferential surface P22 of the power cable protection tube P20, which is the other side (see FIG. 3) of the waterproofing device 100. Then, a filler F10 (see FIG. 4) is filled into a hollow chamber 120 (see FIG. 3) to expand a peripheral wall 110 (see FIG. 3) of the packing body 101. Here, the other side refers to the near side of the conduit P10 in the axial direction (see FIG. 3). This allows the waterproofing device 100 to seal the conduit opening P11.

[0030] <Waterproof device configuration> 2, the waterproof device 100 comprises a packing body 101, a slit 121B formed by dividing a cylindrical peripheral wall 110 of the packing body 101 in the circumferential direction into two opposing edge portions 121, thereby enabling a cable C10 to be inserted into the cylindrical packing body 101 through the edge portions 121, and a hollow chamber 120 having a hollow structure formed inside the peripheral wall 110 and filled with a filler F10 (see FIG. 4) to expand the peripheral wall 110. The packing body 101, the slit 121B, the cable C10, and the hollow chamber 120 will be described below.

[0031] <Configuration of packing body> As shown in Fig. 3, the packing body 101 functions as a water-stopping material. The packing body 101 is configured so that it can be fitted into the gap G10 with the axial direction of its tube aligned with the axial direction of the conduit P10. Therefore, the packing body 101 is made of a cylindrical elastic body and has a size that allows it to be fitted into the gap G10 between the inner circumferential surface P22 of the power cable protection tube P20 on the other side and the cable C10. Here, in the peripheral wall 110 of the packing body 101, the inner diameter of an inner circumferential portion 110A that is the inner circumferential side of the tube of the packing body 101 is appropriately set so as to be able to accommodate three cables C10.

[0032] <Details of the packing body> As shown in FIGS. 2 and 5 , a first seal body 101B having adhesive properties is fitted in the gap (not shown) between the inner circumferential portion 110A of the packing body 101 and each cable C10. The first seal body 101B forms an arc-shaped seal surface 101C that fits tightly against the outer circumferential wall C11, which is the outer surface of each cable C10, and is integrally provided on the inner circumferential portion 110A. The first seal body 101B has a pair of joining surfaces 101D that are opposing surfaces that divide the first seal body 101B in the circumferential direction, and a joining layer 103 that joins these surfaces together. The joining surface 101D is a surface that extends from one of the contact surfaces C11A where the two cables C10 come into contact with each other. The first seal body 101B is made of liquid rubber (in this embodiment, for example, polybutadiene rubber, which has flexibility and adhesive properties) that can be easily reshaped to fit cables of various shapes. This allows the first seal body 101B to deform appropriately under pressure due to the expansion of the peripheral wall 110, which will be described later. Here, the pair of joining surfaces 101D forms a surface that extends from the contact surface C11A where the two cables C10 come into contact to the edge portion 121. This allows the pair of joining surfaces 101D to receive appropriate pressure even if the degree of deformation of the edge portion 121, which will be described later, when the peripheral wall 110 expands is smaller than that of the body wall portion 123 (see FIG. 4). Note that a water-absorbing swelling rubber (in this embodiment, for example, butyl rubber having adhesiveness that becomes tightly adhered when pressed) is used for the adhesive surface of the joining layer 103 where the pair of joining surfaces 101D are joined.

[0033] 3 and 4, second portions 111C are provided in the peripheral wall 110 of the packing body 101 at an outer peripheral portion 111 that is the outer peripheral side of the cylinder of the packing body 101, and are arranged side by side so as to sandwich the first portion 111A (see FIG. 4) in the axial direction of the cylinder of the packing body 101. Here, in this embodiment, the second portions 111C are provided so as to protrude outward more than the first portion 111A. Each portion will be described below.

[0034] <Structure of Part 1> 4, the first portion 111A is provided on the peripheral wall 110 so as to surround the entire circumference of an outer peripheral portion 111 that is the outer peripheral side of the tube of the packing body 101. Here, the first portion 111A is provided with a first seal material 112 along an outer peripheral surface 111B that is the outer peripheral surface of the first portion 111A. Here, the first seal material 112 corresponds to the "seal material" in the present invention.

[0035] <Configuration of the first sealing material> The first sealing material 112 is formed by wrapping a tape-like double-sided seal around the entire periphery of the outer peripheral surface 111B, which is the outer peripheral surface of the first portion 111A, with the start and end of the seal aligned. In this embodiment, the double-sided seal of the first sealing material 112 has adhesive surfaces on both the front and back sides. These adhesive surfaces are made of water-absorbing and swelling rubber (in this embodiment, for example, adhesive butyl rubber), which is the same material as the adhesive surface of the above-mentioned bonding layer 103 (see FIG. 2).

[0036] <Details of the first sealing material> The first seal material 112 is arranged with its rear surface facing the outer peripheral surface 111B of the first portion 111A and bonded to this outer peripheral surface 111B, thereby forming the rear surface as the seal inner surface 112A. In this case, the front surface of the first seal material 112 (i.e., the surface opposite to the seal inner surface 112A) forms the seal outer surface 112B, which is an adhesive surface facing outward from the cylinder of the packing body 101. In other words, the seal inner surface 112A and the seal outer surface 112B of the first seal material 112 have adhesive surfaces.

[0037] Here, the seal outer surface 112B is positioned closer to the first portion 111A than the second portion 111C. With this configuration, the first seal material 112 is inserted through the conduit P10 (see FIG. 3) without being easily caught on the inner circumferential surface P22 of the power cable protection tube P20 (see FIG. 3).

[0038] <Structure of the second part> The second portion 111C extends along the axial direction of the cylinder of the packing body 101 (see FIG. 3), and is provided in a state in which it protrudes outward more than the first portion 111A. Here, the second portion 111C is provided so as to surround the entire circumference of the outer circumferential portion 111 that is the outer circumferential side of the cylinder of the packing body 101 in the peripheral wall 110. In this embodiment, the protrusion of the second portion 111C is adjusted to a size and shape that allows it to be fitted in close contact with the inner circumferential surface P22 of the pipeline P10 (see FIG. 3).

[0039] The second portion 111C is arranged next to the first portion 111A so as to sandwich the first portion 111A in the axial direction (see FIG. 4) in the cylinder of the packing body 101. As a result, the second portion 111C, together with the first portion 111A, forms a groove 111D that opens radially outward (see FIG. 4) in the cylinder of the packing body 101.

[0040] <Slit configuration> 2 and 5, the slit 121B is formed by two opposing edge portions 121 that divide the cylindrical peripheral wall 110 of the packing body 101 in the circumferential direction. This makes it possible for the cable C10 to be inserted into the cylindrical packing body 101 by passing it between the edge portions 121 of the slit 121B.

[0041] <Edge Configuration> Here, the edge portions 121 are portions that close the edges of the peripheral wall 110 at the circumferential end sides of the packing body 101. The opposing surfaces 121A of the two opposing edge portions 121 are provided with bonding layers 103 that are pressed together to form a tight contact state.

[0042] <Cable configuration> As shown in FIGS. 2 and 5, there are three cables C10 according to the first embodiment. A second seal body 102, which is deformed by being pressed by each cable C10 and has adhesive properties, is in close contact with the core space G12 surrounded by the three cables C10. As shown in FIGS. 1 and 3, the three cables C10 are arranged so as to extend linearly in parallel with the axial direction of the conduit P10 (see FIG. 3). However, the three cables C10 may also be arranged so as to be twisted together to form a helical wire (not shown). The second seal body 102 is made of water-absorbing and swelling rubber (e.g., highly adhesive butyl rubber in this embodiment).

[0043] <Configuration of the void room> As shown in Fig. 4, the hollow chamber 120 has a hollow structure provided inside the peripheral wall 110, and is filled with a filler material F10 to expand the peripheral wall 110. Here, as shown in Figs. 2 and 3, an injection pipe 120A for filling the filler material F10 into the hollow chamber 120 and a handle 101A for gripping the waterproofing device 100 are provided in a mutually opposing state on an end wall portion 122 (see Fig. 3) on the other side of the tube of the packing body 101.

[0044] <Vacant room details> As shown in Fig. 5, the hollow chamber 120 is provided along the circumferential direction inside the circumferential wall 110. Here, as shown in Figs. 3 and 4, the hollow chamber 120 is sandwiched radially by a body wall portion 123 (see Fig. 4) and axially by an end wall portion 122 (see Fig. 4), and the edges of the body wall portion 123 and the end wall portion 122 are closed circumferentially by edge portions 121 (see Fig. 5). Here, the first portion 111A (see Fig. 4) is the outer circumferential portion 111 on the outer circumferential side of the body wall portion 123, and the second portion 111C is the outer circumferential portion 111 on the outer circumferential side of the end wall portion 122. The body wall 123 is made of a soft rubber material (in this embodiment, for example, chloroprene rubber with a hardness of about 55°), while the end wall 122 and the edge 121 are made of a hard rubber material (in this embodiment, for example, chloroprene rubber with a hardness of about 70°). Therefore, when the hollow chamber 120 is filled with the filler F10 (see FIG. 4) and the peripheral wall 110 expands, the degree of deformation of the end wall 122 and the edge 121 is smaller than the degree of deformation of the body wall 123.

[0045] <Configuration of injection pipe and handle> As shown in FIGS. 1 and 3, the injection pipe 120A for filling the hollow chamber 120 with the filler F10 (see FIG. 4) protrudes from the end wall portion 122 to the other side (see FIG. 3). An injection valve 120B is attached to the tip of the injection pipe 120A, and the filler F10 can be injected into the injection valve 120B to expand the cylindrical peripheral wall 110 of the packing body 101. The handle 101A has the same outer diameter and protruding length as the injection pipe 120A. This allows the waterproofing device 100 to be easily fitted into or removed from the conduit opening P11 by gripping the injection pipe 120A and the handle 101A with approximately equal gripping force.

[0046] <Filler composition> As shown in Fig. 4, the filler F10 is filled into the hollow chamber 120 through an injection pipe 120A (see Fig. 3). Here, a material having fluidity (for example, silicone liquid in this embodiment) is used as the filler F10.

[0047] <Installing the waterproof device> When assembling the waterproofing device 100 according to the first embodiment described above between the conduit opening P11 and the cable C10, the worker performs the assembling in the following manner.

[0048] First, the worker inserts the second seal body 102 into the core space portion G12 of each cable C10, as shown in Fig. 2. This brings each cable C10 and the second seal body 102 into close contact with each other.

[0049] Next, the worker widens the slits 121B of the packing body 101, and inserts each cable C10, with the second seal body 102 in close contact, into the tube of the packing body 101. Here, each cable C10 is fitted into the seal surface 101C of the first seal body 101B that is integrated with the packing body 101. This brings each cable C10 and the packing body 101 into close contact.

[0050] After each cable C10 is fitted into the tube of the packing body 101, the worker attaches the first seal material 112 to the first portion 111A of the packing body 101, as shown in Fig. 4. Here, the first seal material 112 is arranged by being wrapped around the entire outer circumferential surface 111B of the first portion 111A so that its starting end and ending end coincide with each other.

[0051] 1 and 3, the worker fits the waterproofing device 100 into the pipe opening P11. Here, the worker holds the injection pipe 120A and the handle 101A of the waterproofing device 100 approximately evenly, and then fits the waterproofing device 100 into the pipe opening P11.

[0052] Here, when the waterproofing device 100 is fitted into the conduit opening P11, the play between the second portion 111C and the inner circumferential surface P22 of the conduit opening P11 is smaller than the play between the first portion 111A (see FIG. 4) and the inner circumferential surface P22 of the conduit opening P11. Therefore, when the waterproofing device 100 is fitted into the conduit opening P11, the second portion 111C aligns the position of the second portion 111C with respect to the inner circumferential surface P22 of the conduit opening P11 with higher positional accuracy than when the first portion 111A is fitted into the conduit opening P11. This reduces the deviation in play between the first portion 111A (see FIG. 4) and the inner circumferential surface P22 of the conduit opening P11, making it less likely that the first sealant 112 will get caught on the inner circumferential surface P22 of the conduit opening P11.

[0053] Furthermore, because the second portion 111C is provided so as to sandwich the first portion 111A (see FIG. 4), the second portion 111C slides on the inner circumferential surface P22 of the conduit opening P11. As a result, while the second portion 111C slides on the inner circumferential surface P22 of the conduit opening P11, the packing body 101 is inserted into the conduit P10 while suppressing wobble in the axial direction of the tube. Furthermore, because the first sealant 112 (see FIG. 4) is disposed in the groove 111D (see FIG. 4) formed by the second portion 111C and the first portion 111A, when the waterproofing device 100 is fitted into or removed from the conduit opening P11, even if the first sealant 112 is turned up, it is caught on the second portion 111C and is therefore unlikely to come off.

[0054] After fitting the waterproofing device 100 into the pipe opening P11, the worker fills the hollow chamber 120 with filler F10 (see FIG. 4) through the injection valve 120B of the injection pipe 120A, as shown in FIG. 3. As a result, as shown in FIGS. 4 and 5, the body wall portion 123 deforms and the peripheral wall 110 expands in the radial direction of the packing body 101. As a result, the first seal body 101B deforms appropriately due to the pressure caused by the expansion of the peripheral wall 110. Then, the first portion 111A of the packing body 101 approaches the inner peripheral surface P22, and the first seal material 112 (see FIG. 4) disposed in the first portion 111A comes into close contact with the inner peripheral surface P22. As a result, the closely contacted first seal material 112 functions as a waterproofing material against water in the pipe P10 (see FIG. 3) on one side (see FIG. 3). In this case, the pair of joining surfaces 101D of the first seal body 101B forms a surface that extends from the contact surface C11A where the two cables C10 come into contact to the edge portion 121, and exerts pressure on each other. Here, one side refers to the side that is the far side in the axial direction of the conduit P10 (see FIG. 3).

[0055] 4, when the filler F10 is filled into the hollow chamber 120, the second portion 111C warps outward in the axial direction of the cylinder of the packing body 101. This results in the formation of a minute gap G11 between the inner circumferential surface P22 and the second portion 111C.

[0056] This completes the assembly of the waterproofing device 100 to the pipe opening P11. When the cylindrical peripheral wall 110 of the packing body 101 expands, it presses against the joining surface 101D of the first seal body 101B and the opposing surface 121A of the edge portion 121, as shown in Figures 2 and 5. This allows the joining surface 101D and the opposing surface 121A to be in tight contact with each other via the joining layer 103.

[0057] <Actions and Effects> According to the waterproofing device 100 described above, the packing body 101 is fitted into the gap G10 between the inner circumferential surface P22 of the conduit opening P11 and the cable C10, and then the hollow chamber 120 is filled with the filler F10 to expand the peripheral wall 110 of the packing body 101, thereby sealing the conduit opening P11. A first sealant 112 is disposed along an outer circumferential surface 111B of the first portion 111A of the peripheral wall 110 of the packing body 101. The second portion 111C is provided so as to protrude outward more than the first portion 111A. Therefore, when the waterproofing device 100 is fitted into the conduit opening P11, the play between the second portion 111C and the inner circumferential surface P22 of the conduit opening P11 is smaller than the play between the first portion 111A and the inner circumferential surface P22 of the conduit opening P11. Therefore, when the waterproofing device 100 is fitted into the pipe opening P11, the second portion 111C can be aligned with the inner circumferential surface P22 of the pipe opening P11 with higher positional accuracy than when the first portion 111A is fitted into the pipe opening P11. This reduces the deviation in play between the first portion 111A and the inner circumferential surface P22 of the pipe opening P11, thereby reducing the risk of the first sealant 112 getting caught on the inner circumferential surface P22 of the pipe opening P11. Furthermore, according to the waterproofing device 100 described above, the first sealant 112 in the first portion 111A where the peripheral wall 110 is expanded can function as a waterproofing material. Therefore, it is possible to provide a waterproofing device 100 that has improved waterproofing properties and improved workability when fitting into the pipe opening P11.

[0058] According to the waterproofing device 100 described above, the second portion 111C of the waterproofing device 100 protrudes more radially outward than the seal outer surface 112B, making it even less likely that the first seal material 112 disposed in the first portion 111A will get caught on the inner peripheral surface P22 of the pipe opening P11. This further improves the ease of fitting the waterproofing device 100 into the pipe opening P11.

[0059] According to the above-mentioned waterproofing device 100, the first part 111A, the second part 111C, and the first sealing material 112 are arranged to surround the entire circumference of the outer peripheral part 111 of the packing body 101, so that the pipe opening P11 is also kept sealed all around.

[0060] According to the waterproofing device 100 described above, simply by fitting the ring of the first seal material 112 onto the outer periphery portion 111 of the packing body 101, the first seal material 112 can be made to surround the entire periphery of the outer periphery surface 111B.

[0061] According to the above-described waterproof device 100, the second part 111C is arranged to sandwich the first part 111A in the axial direction, thereby forming the groove 111D together with the first part 111A. In this way, when the waterproof device 100 is fitted into or removed from the pipe opening P11, the outwardly projecting second part 111C makes it difficult for the first sealant 112 provided in the groove 111D to come off.

[0062] According to the waterproof device 100 described above, the first sealant 112 is a double-sided seal, and therefore adheres to both the inner circumferential surface P22 of the pipe opening P11 and the first portion 111A of the packing body 101. This allows the pipe opening P11 to be sealed.

[0063] <Waterproofing device according to the second embodiment> Next, the configuration of a waterproof device 200 according to a second embodiment of the present invention will be described with reference to Fig. 6 to Fig. 9. The waterproof device 200 according to the second embodiment is a modified version of the waterproof device 100 according to the first embodiment. Therefore, for components common to the waterproof device 100 according to the first embodiment, the numerals added with "100" are used to correspond to the numerals assigned to the components of the waterproof device 100 according to the first embodiment, and detailed description thereof will be omitted.

[0064] <Configuration of packing body> As shown in Fig. 7, the packing body 201 functions as a water-stopping material. The packing body 201 is configured so that it can be fitted into the gap G20 with the axial direction of its tube aligned with the axial direction of the conduit P10. Therefore, the packing body 201 is made of a cylindrical elastic body and has a size that allows it to be fitted into the gap G20 between the inner circumferential surface P22 of the power cable protection tube P20 on the other side and the cable C20. Here, in the peripheral wall 210 of the packing body 201, an inner circumferential portion 210A that is the inner circumferential side of the tube of the packing body 201 has an inner diameter that is appropriately set so that it can accommodate even when the cable C20 is used.

[0065] <Details of the packing body> As shown in Fig. 6, an adhesive layer 201B having adhesive properties is adhered to a gap (not shown) between the inner peripheral portion 210A of the packing body 201 and the cable C20. The adhesive layer 201B adheres to the outer peripheral wall C21, which is the outer peripheral surface of the cable C20, and also adheres to the inner peripheral portion 210A. Here, the adhesive surfaces of the adhesive layers (not shown) to which the adhesive layer 201B adheres are made of water-absorbing swelling rubber (for example, adhesive butyl rubber in this embodiment), which is the same material as the adhesive surface of the above-mentioned bonding layer 103 (see Fig. 2).

[0066] In addition, in the peripheral wall 210 of the packing body 201, the second portion 211C is provided in the outer peripheral portion 211 on the outer periphery of the tube of the packing body 201, as shown in Figure 7, in a state where it is arranged side by side so as to sandwich the first portion 211A (see Figure 8) from the axial direction of the tube of the packing body 201.

[0067] <Structure of Part 1> As shown in Fig. 8, the first portion 211A is provided in the peripheral wall 210 so as to surround the entire periphery of the outer peripheral portion 211, which is the outer peripheral side of the tube of the packing body 201. Here, the first portion 211A is provided with a second seal material 212 along its outer peripheral surface 211B, which is its outer peripheral surface. This second seal material 212 corresponds to the "seal material" in the present invention, and is provided in place of the first seal material 112 (see Fig. 4) provided in the first portion 111A (see Fig. 4) in the waterproof device (see Fig. 1) according to the first embodiment.

[0068] <Configuration of second sealing material> The second seal material 212 has an annular shape that surrounds the entire outer circumferential surface 211B of the first portion 211A. The second seal material 212 is an elastic body that can be elastically compressed in the thickness direction. The surface of the second seal material 212 facing the outer circumferential surface 211B of the first portion 211A is an inner seal surface 212A, and the surface opposite the inner seal surface 212A is an outer seal surface 212B. When the second seal material 212 is in its natural state, in which no external force is applied, the outer seal surface 212B protrudes outward beyond the second portion 211C. Therefore, when the waterproofing device 200 (see FIG. 7) is fitted into the pipe opening P11 (see FIG. 7), the second seal material 212 is in a compressed state and comes into contact with the inner circumferential surface P22 of the pipe opening P11. Here, an adhesive surface is set on a seal inner surface 212A that faces the outer peripheral surface 211B of the first portion 211A in the second seal material 212. The second seal material 212 uses an elastic material (for example, an EPDM foam material in this embodiment) as a base material, and uses a water-absorbing swelling rubber (for example, adhesive butyl rubber in this embodiment), which is the same material as the adhesive surface of the above-mentioned bonding layer 103 (see FIG. 2), for the adhesive surface.

[0069] <Cable configuration> As shown in FIG. 6, the cable C20 according to this embodiment is one cable.

[0070] <Installing the waterproof device> When assembling the waterproofing device 200 according to the second embodiment described above between the conduit opening P11 and the cable C20, the worker performs the assembling in the following manner.

[0071] First, the worker widens the slit 221B of the packing body 201 and inserts the cable C20 into the cylindrical packing body 201. Here, the adhesive layer 201B is adhered to the inner peripheral portion 210A of the packing body 201 in advance. The adhesive layer 201B may also be adhered to the outer peripheral wall C21 of the cable C20 in advance. This brings the cable C20 and the packing body 201 into close contact with each other.

[0072] After the cable C20 is fitted into the tube of the packing body 201, the worker attaches the second seal material 212 to the first portion 211A of the packing body 201, as shown in Fig. 8. Here, the second seal material 212 is arranged by being wrapped around the entire outer circumferential surface 211B of the first portion 211A so that its starting end and ending end coincide with each other.

[0073] Thereafter, the worker fits the waterproofing device 200 into the conduit opening P11, as shown in Fig. 7. Here, the worker holds the injection tube 220A and the handle 201A of the waterproofing device 200 approximately evenly, and then fits the waterproofing device 200 into the conduit opening P11.

[0074] When the waterproofing device 200 is fitted into the conduit opening P11, the second portion 211C, which sandwiches the first portion 211A (see FIG. 8), slides on the inner circumferential surface P22 of the conduit opening P11. The outer seal surface 212B (see FIG. 8) of the second seal member 212 (see FIG. 8) disposed on the first portion 211A is provided so as to protrude radially outward from the second portion 211C. Therefore, as shown in FIG. 8, the second seal member 212 is pulled in the axial direction relative to the inner circumferential surface P22 of the conduit opening P11 (see FIG. 7), and is inserted through the conduit P10 (see FIG. 7) in a state where it is elastically contracted in the thickness direction. This allows the second seal member 212 to conform to the inner circumferential surface P22 of the conduit P10 and contract in the thickness direction, making the inserted second seal member 212 less likely to turn over.

[0075] When the waterproofing device 200 is fitted into the pipe opening P11 (see FIG. 7), the second seal material 212 is compressed and comes into contact with the inner circumferential surface P22 of the pipe opening P11.

[0076] After fitting the waterproofing device 200 into the pipe opening P11, an operator fills the hollow chamber 220 with filler F10 (see FIG. 9) through the injection valve 220B of the injection pipe 220A, as shown in FIG. 7. When the filler F10 is filled into the hollow chamber 220, the body wall portion 223 is deformed, as shown in FIG. 9. The peripheral wall 210 then expands in the thickness direction. As a result, the first portion 211A of the packing body 201 approaches the inner circumferential surface P22, and the second sealant 212 disposed in the first portion 211A is further compressed between the inner circumferential surface P22 and the first portion 211A. As a result, the further compressed second sealant 212 functions as a waterproofing material against water in the pipe P10 (see FIG. 7) on one side (see FIG. 7).

[0077] This completes the assembly of the waterproofing device 200 to the pipe opening P11. As the cylindrical peripheral wall 210 of the packing body 201 expands, it presses the opposing surface 221A of the edge portion 221, as shown in Fig. 6. This allows the opposing surface 221A to be in tight contact with the bonding layer 203.

[0078] <Changes in pipe opening over time> As shown in FIG. 7, when the pipe opening P11 is sealed by the waterproofing device 200, the pipe opening P11 may be deformed due to changes in the environment. For example, changes in the environmental temperature or the application of an external force may cause the pipe opening P11 to deform and change its inner diameter. Even in such cases, the deformable, compressed second sealant 212 (see FIG. 9) will deform appropriately in its thickness direction (see FIG. 9). This allows the second sealant 212 to function as a waterproofing material against water in the pipe P10 on one side.

[0079] <Actions and Effects> According to the waterproofing device 200 described above, when the waterproofing device 200 is fitted into the pipe opening P11, the second sealant 212, which protrudes outward from the second portion 211C, is pulled axially relative to the inner circumferential surface P22 of the pipe P10. As a result, the second sealant 212 is inserted through the pipe P10 in a state where it is elastically contracted in the thickness direction. This allows the second sealant 212 to conform to the inner circumferential surface P22 of the pipe P10 and contract in the thickness direction, making it less likely to turn up. Furthermore, even if the pipe opening P11 deforms and its inner diameter changes when the waterproofing device 200 is fitted into the pipe opening P11, the second sealant 212 elastically deforms in the thickness direction. This allows the pipe opening P11 to be appropriately sealed. Therefore, it is possible to provide the waterproofing device 200 that achieves both improved waterproofing when the pipe opening P11 is deformed and suppressed deterioration in workability when fitting the waterproofing device 200 into the pipe opening P11.

[0080] <Waterproofing device according to the third embodiment> Next, the configuration of a waterproof device 300 according to a third embodiment of the present invention will be described with reference to Figures 10 to 13. The waterproof device 300 according to the third embodiment is a modified version of the waterproof device 100 according to the first embodiment. Therefore, for components common to the waterproof device 100 according to the first embodiment, the numerals added with "200" are used to correspond to the numerals assigned to the components of the waterproof device 300 according to the first embodiment, and detailed description thereof will be omitted.

[0081] <Configuration of packing body> As shown in Fig. 11, the packing body 301 functions as a water-stopping material. The packing body 301 is configured so that it can be fitted into the gap G30 with the axial direction of its tube aligned with the axial direction of the conduit P10. Therefore, the packing body 301 is made of a cylindrical elastic body and has a size that allows it to be fitted into the gap G30 between the inner circumferential surface P22 of the power cable protection tube P20 on the other side and the cable C30. Here, the inner diameter of an inner circumferential portion 310A of the peripheral wall 310 of the packing body 301, which is the inner circumferential side of the tube of the packing body 301, is appropriately set so that it can accommodate even when three cables C30 are used.

[0082] <Details of the packing body> As shown in FIG. 10 , a first seal body 301B having adhesive properties is fitted in the gap (not shown) between the inner peripheral portion 310A of the packing body 301 and each cable C30. The first seal body 301B forms an arc-shaped seal surface 301C that fits tightly against the outer peripheral wall C31, which is the outer peripheral surface of each cable C30, and is integrally provided on the inner peripheral portion 310A. The first seal body 301B has a pair of joining surfaces 301D, which are opposing surfaces that divide the first seal body 301B in the circumferential direction, and a joining layer 303 where these surfaces are joined together. The first seal body 301B is made of liquid rubber (e.g., flexible and adhesive polybutadiene rubber in this embodiment) that can be easily deformed so that it can fit tightly to cables of various shapes. This allows the first seal body 301B to deform appropriately under pressure due to the expansion of the peripheral wall 310, which will be described later. Furthermore, the angle 301F of the ridge 301E formed by the sealing surface 301C and the joining surface 301D of the first seal body 301B is set to be an angle of 90° or more. This makes it easier for the liquid rubber to enter the side of the ridge 301E formed by the sealing surface 301C and the joining surface 301D compared to when the angle 301F is an acute angle. This improves the formability of the first seal body 301B. The adhesive surface of the joining layer 303 where the pair of joining surfaces 301D are joined is made of a water-absorbing swelling rubber (in this embodiment, for example, butyl rubber having adhesiveness that allows it to adhere when pressed) that is the same material as the above-mentioned joining layer 103 (see FIG. 2).

[0083] <Structure of the second part> As shown in Fig. 11, the second portion 311C extends along the axial direction of the tube of the packing body 301 and is provided in a state where it protrudes outward more than the first portion 311A ​​(see Fig. 12). The second portion 311C is provided in a state where it is arranged side by side so as to sandwich the first portion 311A ​​in the axial direction. As a result, the second portion 311C forms a groove 311D (see Fig. 12) together with the first portion 311A. Here, the second portion 311C is also provided in the peripheral wall 310 so as to surround the entire circumference of the outer periphery portion 311, which is the outer periphery side of the tube of the packing body 301.

[0084] <Details of the second part> 12, a lip 311E is attached to the second portion 311C so as to extend along the second portion 311C and protrude outward beyond the second portion 311C. The lip 311E is arranged in a line so as to cover the second portion 311C from the outside in the axial direction of the tubular packing body 301. In this way, when the peripheral wall 310 expands in the fitted state, the lip 311E covers the minute gap G31 (see FIG. 13) formed between the inner circumferential surface P22 and the second portion from the outside in the axial direction of the tubular packing body 301. This makes it possible to improve the function of the waterproofing device 300 as a waterproofing material.

[0085] <Cable configuration> As shown in FIG. 10, the cable C30 according to the third embodiment has a smaller wire diameter than the cable C10 (see FIG. 2), and three such cables C30 are present. A second seal body 302, which is deformed by being pressed by each cable C30 and has adhesive properties, is tightly attached to the core space G32 surrounded by the three cables C30. As shown in FIG. 11, the three cables C30 are arranged so as to extend linearly in parallel with the axial direction of the conduit P10. However, the three cables C30 may also be arranged in a twisted state (not shown) to form a helical wire. The second seal body 302 (see FIG. 10) is made of water-absorbing and swelling rubber (e.g., highly adhesive butyl rubber in this embodiment).

[0086] <Installing the waterproof device> 10 to 13, the waterproofing device 300 according to the third embodiment described above has the same configuration as the waterproofing device 100, except for the shapes of the cable C30, the first seal body 301B, and the second seal body 302, and the presence or absence of a lip 311E in the packing body 301. Furthermore, the method of assembling the waterproofing device between the conduit opening and the cable is the same for the waterproofing devices 100 and 300 described above. Therefore, a detailed description of the method of assembling the waterproofing device 300 between the conduit opening P11 and the cable C30 will be omitted. However, since the waterproofing device 100 (see FIG. 4) does not have the lip 311E (see FIG. 4), the behavior of the lip 311E when assembling the waterproofing device 300 between the conduit opening P11 and the cable C30 will be described separately below.

[0087] Assume that an operator fits the waterproofing device 300 into the pipe opening P11 as shown in Fig. 11. Here, the lip 311E provided on the second portion 311C from the axially outer side of the tube of the packing body 301 is in a compressed state and comes into contact with the inner circumferential surface P22 of the pipe opening P11 (see Fig. 11) as shown in Fig. 13. Then, the lip 311E presses against the inner circumferential surface P22 of the pipe opening P11, making it difficult for the waterproofing device 300 to come off the pipe opening P11.

[0088] After fitting the waterproofing device 300 into the pipe opening P11, the worker fills the hollow chamber 320 with filler F10 (see FIG. 10) through the injection valve 320B of the injection pipe 320A, as shown in FIG. 11. When the peripheral wall 310 expands, the second portion 311C warps outward in the axial direction of the tubular packing body 301, as shown in FIG. 13. This results in the formation of a minute gap G31 between the inner circumferential surface P22 and the second portion 311C. The packing body 301 then covers the minute gap G31 from the axial direction of the tubular packing body 301 with its lip 311E, thereby sealing the minute gap G31. This improves the waterproofing function of the waterproofing device 300 (see FIG. 11).

[0089] As a result, the waterproofing device 300 is completely attached to the pipe opening P11, as shown in Fig. 11. When the cylindrical peripheral wall 310 of the packing body 301 expands, it presses against the joining surface 301D of the first seal body 301B and the opposing surface 321A of the edge portion 321, as shown in Fig. 10. This allows the joining surface 301D and the opposing surface 321A to be in close contact with each other via the joining layer 303.

[0090] <Actions and Effects> According to the waterproofing device 300 described above, in the fitted state, the lip 311E covers the second portion 311C from the outside in the axial direction of the tube of the packing body 301. This improves the function of the waterproofing device 300 as a waterproofing material.

[0091] The waterproofing device according to each of the above-described embodiments has the above-described configurations, which allows for both further improvement in waterproofing and suppression of a decrease in workability when fitting into the pipe opening P11.

[0092] <Other embodiments> The above-described embodiments have been used to describe the modes for carrying out the present invention. However, it will be apparent to those skilled in the art that various substitutions, modifications, and alterations are possible without departing from the scope of the present invention. In other words, the modes for carrying out the objects of the present invention may include all substitutions, modifications, and alterations that do not depart from the spirit and purpose of the claims appended hereto. For example, the following various modes can be implemented as modes for carrying out the present invention.

[0093] In the present disclosure, the specific configuration and shape of the sealing material are not limited to those described in the above-described embodiments. That is, the sealing material may be an endless ring that surrounds the entire outer periphery of the first portion. The sealing material may also be a spiral or helical wire that wraps around the entire outer periphery of the first portion. In such cases, the sealing material may have a starting end and an ending end that are located at different positions. Furthermore, the sealing material does not necessarily have to be arranged to surround the entire outer periphery of the first portion, but may also be arranged so that a "gap" is formed on the outer periphery where no sealing material is present.

[0094] As another aspect of each of the above-described embodiments, the waterproofing device may be configured such that only one second portion is provided, and the second portion is disposed on one side of the first portion.

[0095] As another aspect of each of the above-described embodiments, the waterproofing device may have a configuration in which three second portions are provided.

[0096] In another aspect of each of the above-described embodiments, the waterproofing device may use the same type of rubber material for the end wall, edge, and barrel wall of the packing body. In such a case, if a hard rubber material is used for the barrel wall, the barrel wall will be thinner than the barrel wall of each embodiment, and will deform to the same extent as the barrel wall when the peripheral wall expands. This allows only one type of material to be used for the packing body, thereby facilitating inventory management of the components that make up the packing body.

[0097] As another aspect of the first embodiment described above, in the waterproofing device, the first seal material provided in the first portion may have an adhesive surface only on the inner surface of the seal. In this case, it is possible to reduce the risk that the outer surface of the seal will get caught on the inner circumferential surface of the power cable protection tube when fitting the waterproofing device.

[0098] As another aspect of the first embodiment described above, the waterproofing device 400 is an embodiment in which the first seal body 101B of the waterproofing device 100 according to the first embodiment is modified. Therefore, for components common to the components of the first seal body 101B according to the first embodiment described above, reference numerals are assigned in which "300" is added to the reference numerals assigned to the components of the first seal body 101B according to the first embodiment, and detailed descriptions thereof will be omitted.

[0099] As shown in FIG. 14, the waterproofing device 400 has a first sealing body 401B that forms an arc-shaped sealing surface 401C that adheres to the outer wall C11, which is the outer surface of a single cable C10, and is integrally provided on the inner portion 110A.

[0100] In another aspect of the second embodiment, the waterproofing device may be configured such that the second seal does not have to have an adhesive surface. In such a case, the worker can attach the second seal to the first portion by fitting it to the first portion. Furthermore, in a waterproofing device in which the second portion is arranged to axially sandwich the first portion, when the waterproofing device is being fitted or removed, the second seal is caught by the outwardly protruding second portion, making it difficult to come off the first portion.

[0101] As another aspect of the third embodiment described above, the waterproofing device 500 is an embodiment in which the first seal body 301B of the waterproofing device 300 according to the third embodiment is modified. Therefore, for components common to the components of the first seal body 301B according to the third embodiment described above, reference numerals obtained by adding "200" to the reference numerals attached to the components of the first seal body 301B according to the third embodiment are assigned to correspond to the components, and detailed description thereof will be omitted.

[0102] As shown in FIG. 15, the waterproofing device 500 is configured such that an angle 501F of a ridge 501E formed by a sealing surface 501C and a joint surface 501D in the first seal body 501B is less than 90°. Here, the pair of joint surfaces 501D forms a surface extending from a contact surface C31A where the two cables C10 contact to the opposing surface 321A of the edge portion 321. This allows the pair of joint surfaces 501D to appropriately exert pressure on each other even when the degree of deformation of the edge portion 321 when the peripheral wall 110 expands is smaller than that of the body wall portion 323 (see FIG. 13). This allows the first seal body 501B to appropriately deform under pressure due to the expansion of the peripheral wall 110, which will be described later.

[0103] As another aspect of the above-described third embodiment, the waterproof device 600 is an embodiment in which the packing body 301 of the waterproof device 300 according to the third embodiment is modified. Therefore, for configurations that form part of the waterproof device 600 and that are common to each configuration of the packing body 301 according to the above-described third embodiment, a reference numeral with "300" added to the reference numeral attached to each configuration of the packing body 301 according to the third embodiment is attached to correspond to the same, and detailed description thereof will be omitted.

[0104] As shown in Figure 16, when the waterproofing device 600 is in an inserted state, with the side that is the back side of the conduit P10 (see Figure 11) being one side, at least one of the lips 611E that are arranged next to the second part 611C may be arranged on one side of the first part 611A. [Explanation of symbols]

[0105] 100 waterproofing device 101 Packing body 101A Handle 101B First seal body 101C sealing surface 101D Joint surface 102 Second seal body 103 Bonding layer 110 Peripheral wall 110A inner circumference 111 Outer area 111A First Part 111B Outer surface 111C Second Part 111D Groove 112 First sealing material (sealing material) 112A Seal inner surface (adhesive surface) 112B Seal outer surface (adhesion surface) 120 Hollow chamber 120A injection tube 120B Injection Valve 121 Edge 121A Opposite surface 121B Slit 122 End wall 123 Torso wall 200 Waterproofing device 201 Packing body 201A Handle 201B Adhesive layer 201C sealing surface 201D Joint surface 203 Bonding layer 210 Peripheral wall 210A inner circumference 211 Outer area 211A First Part 211B Outer surface 211C Second Part 211D Groove 212 Second sealing material (sealing material) 212A Seal inner surface (adhesive surface) 212B Seal outer surface 220 Hollow chamber 220A injection tube 220B Injection Valve 221 Edge 221A Opposite side 221B Slit 222 End wall 223 Torso wall part 300 Waterproofing device 301 Packing body 301A Handle 301B First seal body 301C sealing surface 301D joint surface 301E Ridgeline 301F corner 302 Second seal body 303 Bonding layer 310 Peripheral wall 310A inner circumference 311 Outer area 311A First Part 311B Outer surface 311C Second Part 311D Groove 311E Lip 312 First seal material (seal material) 312A Seal inner surface 312B Seal outer surface 320 Hollow chamber 320A injection tube 320B Injection Valve 321 Edge 321A Opposite side 321B Slit 322 End wall 323 Torso wall 400 Waterproofing device 401 Packing body 401B First seal body 401C sealing surface 401D joint surface 500 waterproofing device 501 Packing body 501B First seal body 501C sealing surface 501D joint surface 501E Ridgeline 501F corner 600 Waterproofing device 601 Packing body 610 Peripheral wall 610A inner circumference 611 Outer area 611A First Part 611B Outer surface 611C Second Part 611D Groove 611E Lip 612 First sealing material (sealing material) 612A Seal inner surface 612B Seal outer surface 620 Hollow chamber C10 cable C11 Outer wall C11A contact surface C20 Cable C21 Outer wall C30 Cable C31 Outer wall C31A contact surface F10 Filler G10 gap G11 Minute Gap G12 Core space G20 Gap G21 Minute Gap G30 Gap G31 Minute Gap G32 Core space P10 Pipeline P11 Pipe port P20 Power cable protection tube P21 end P22 Inner surface

Claims

1. A waterproofing device that can realize a fitted state in a conduit opening of a conduit into which a cable is inserted, a packing body made of an elastic body having a cylindrical shape and sized to be fitted into the gap between the inner circumferential surface of the conduit opening and the cable; a slit that divides the peripheral wall of the tubular packing body in the circumferential direction into two opposing edge portions, thereby allowing the cable to be inserted into the tubular packing body through the gap between the edge portions; a hollow space having a hollow structure provided inside the peripheral wall, the hollow space being filled with a filler material to expand the peripheral wall; Equipped with The peripheral wall has an outer peripheral portion on the outer periphery of the cylinder of the packing body, a first portion provided in a state of extending in the circumferential direction and a second portion provided in a state of extending along the first portion and projecting outward more than the first portion are provided in a state of being aligned in an axial direction of the cylinder of the packing body, a seal material is disposed along an outer peripheral surface of the first portion, the outer peripheral surface being a surface on the outer peripheral side of the first portion; the seal material has an inner seal surface facing the outer peripheral surface and an outer seal surface being a surface opposite to the inner seal surface; The sealing material is an elastic body that can be elastically compressed in a thickness direction, In a natural state where no external force is applied, the seal outer surface protrudes outward beyond the second portion, In the fitted state, the sealing material is in the compressed state and contacts the inner circumferential surface of the pipe opening.

2. A waterproofing device capable of realizing a fitted state in a conduit opening in a conduit into which a cable is inserted, a packing body made of an elastic body having a cylindrical shape and sized to be fitted into the gap between the inner circumferential surface of the conduit opening and the cable; a slit that divides the peripheral wall of the tubular packing body in the circumferential direction into two opposing edge portions, thereby allowing the cable to be inserted into the tubular packing body through the gap between the edge portions; a hollow space having a hollow structure provided inside the peripheral wall, the hollow space being filled with a filler material to expand the peripheral wall; Equipped with The peripheral wall has an outer peripheral portion on the outer periphery of the cylinder of the packing body, a first portion provided in a state of extending in the circumferential direction and a second portion provided in a state of extending along the first portion and projecting outward more than the first portion are provided in a state of being aligned in an axial direction of the cylinder of the packing body, a seal material is disposed along an outer peripheral surface of the first portion, the outer peripheral surface being a surface on the outer peripheral side of the first portion; the seal material has an inner seal surface facing the outer peripheral surface and an outer seal surface being a surface opposite to the inner seal surface; A waterproofing device in which a lip extends along the second portion and protrudes outward from the second portion, and is arranged in a line so as to cover the second portion from the outside in the axial direction of the tube of the packing body.

3. A waterproofing device capable of realizing a fitted state in a conduit opening in a conduit into which a cable is inserted, a packing body made of an elastic body having a cylindrical shape and sized to be fitted into the gap between the inner circumferential surface of the conduit opening and the cable; a slit that divides the peripheral wall of the tubular packing body in the circumferential direction into two opposing edge portions, thereby allowing the cable to be inserted into the tubular packing body through the gap between the edge portions; a hollow space having a hollow structure provided inside the peripheral wall, the hollow space being filled with a filler material to expand the peripheral wall; Equipped with The peripheral wall has an outer peripheral portion on the outer periphery of the cylinder of the packing body, a first portion provided in a state of extending in the circumferential direction and a second portion provided in a state of extending along the first portion and projecting outward more than the first portion are provided in a state of being aligned in an axial direction of the cylinder of the packing body, a seal material is disposed along an outer peripheral surface of the first portion, the outer peripheral surface being a surface on the outer peripheral side of the first portion; the seal material has an inner seal surface facing the outer peripheral surface and an outer seal surface being a surface opposite to the inner seal surface; The waterproof device, wherein the sealing material is a double-sided seal having adhesive surfaces on both the inner seal surface and the outer seal surface.

4. The waterproof device according to any one of claims 1 to 3, The waterproof device, wherein the second portion is provided in a state of protruding outward from the seal outer surface.

5. The waterproofing device according to any one of claims 1 to 4, A waterproof device, wherein the first portion, the second portion, and the sealing material are provided so as to surround the entire periphery of the outer periphery portion.

6. The waterproofing device according to claim 5, The waterproof device is such that the sealing material is wrapped around the entire outer periphery, with the starting end and the ending end coinciding with each other.

7. The waterproofing device according to any one of claims 1 to 6, The waterproofing device, wherein the second portion is arranged to sandwich the first portion in the axial direction, thereby forming a groove together with the first portion.

Images