Airtight sealing device and airtight sealing structure

Abstract

This invention provides an airtight sealing device that can maintain airtightness around wiring and piping materials at points where they penetrate the walls of a cleanroom. [Solution] The airtight sealing device 1A has an internal routing path for the wiring material 60 and comprises a main body 10 with one end inserted into a through hole 51 in the wall 50, a fixing part 20 provided between one end and the other end of the main body 10 and fixed to the wall 50, and a receiving part 31 located within the routing path of the main body 10 and receiving the sealing material 34 that is filled into the interior from the other end of the main body 10. The airtight sealing device 1A is fixed to the wall 50 by the fixing part 20, and the other end of the main body 10 is positioned upright on the wall 50 so as to be spaced away from the wall 50. This makes it easier for workers to notice the airtight sealing area and prevents the airtightness from being compromised by accidentally stepping on the airtight sealing device 1A, which could create a gap between the sealing material 34 and the wiring material 60.

Description

Technical Field

[0001] The present invention relates to an airtight treatment tool and an airtight treatment structure for airtight-treating a location where wiring and piping materials are arranged so as to pass through a through-hole formed in a wall portion of a building.

Background Art

[0002] In a clean room maintained with clean air, a location provided with a through-hole for allowing a wiring material or a piping material to pass through a wall portion such as a ceiling is airtight-treated to prevent the intrusion of outside air. Regarding this airtight treatment, for example, in the through-hole airtight holding structure described in Patent Document 1, it includes a flat plate portion having an opening at the center and a pipe guide body which is a cylindrical body extending vertically from the opening, and it is disclosed that a sealing material is filled in the gap between the pipe and the pipe guide body.

[0003] According to this airtight holding structure, due to the pipe guide body, the sealing material is filled with thickness in the gap between the pipe and the pipe guide body in a state of being in close contact with the wall surfaces thereof without directly contacting the rough wall surface of the through-hole, so that stable airtightness is realized.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, the ceilings of cleanrooms are often constructed with walkable ceiling panels, allowing workers to walk on the top surface for work and inspections. In such cases, workers may not notice where pipes or cables penetrate the ceiling and may step on airtight sealing devices installed at these penetration points, such as the penetration airtightness retention structure described in Patent Document 1, or snag wiring materials with their feet. In such cases, vibrations caused by stepping on the pipes or cables can impact the contact points between the pipes and the sealing material, impairing the tight seal between them. Furthermore, if cables are routed in a bent manner along the top surface of the ceiling from the penetration point, the existence of the penetration point may be difficult to discern, leading to the stepping on or snagging of the bent sections of the cables, creating gaps between the sealing material and the cables. As a result, the airtightness at the pipe and cable penetration points may be lost.

[0006] Therefore, the present invention aims to provide an airtight sealing device and structure that make it easy to notice airtight areas and prevent accidental contact with these areas, thereby maintaining airtightness around wiring and piping materials that penetrate the walls of a cleanroom. [Means for solving the problem]

[0007] The airtight sealing device according to claim 1 is for sealing an area where wiring and piping materials are arranged to pass through a through-hole formed in a wall, The main body has an internal routing path for the wiring and piping material with both ends open, and one end is inserted into the through hole, A fixing part is provided between one end and the other end of the main body, which abuts against the periphery of the through hole in the wall to determine the insertion amount on the one end side, and is fixed to the wall, A receiving portion located within the installation path of the main body, which receives the sealing material that is filled into the interior from the other end of the main body, Equipped with, With the main body fixed to the wall by the aforementioned fixing part, the other end of the main body is positioned upright on the wall so as to be spaced apart from the wall. As a result, the airtight sealing device is positioned vertically from the wall, making its presence more visible and alerting workers walking nearby to avoid stepping on it. Furthermore, the receiving section prevents the sealant from leaking out to one end of the main body.

[0008] The airtight sealing device according to claim 2 is particularly characterized in that the distance between the receiving portion and the other end of the main body portion is greater than the required filling length of the sealing material in the direction in which the wiring and piping materials are laid out along the installation route. As a result, the distance between the receiving part and the other end of the main body becomes unnecessarily long, and the presence of the airtight sealing device is noticeable, making it easier for workers and others to become more aware of its existence. Furthermore, if the portion of the airtight sealing device for wiring and piping materials that is positioned on the outside is kicked, the moving wiring and piping materials will come into contact with the inner surface of the other end of the main body, preventing them from moving any further. This prevents deformation of the filled sealant and the formation of gaps between the sealant and the wiring and piping materials, which would compromise the airtight seal.

[0009] The airtight sealing device according to claim 3 is further characterized in that the fixing portion is provided on an annular flange portion that protrudes outward from the main body portion in a circumferential direction, and an annular packing is provided on the flange portion that surrounds the through hole and is interposed between the flange portion and the wall portion of the peripheral edge of the through hole. This allows the flange portion to ensure airtightness over a wide area, including the periphery of the through-hole. Furthermore, the packing enhances airtightness.

[0010] The airtight sealing device according to claim 4 is further provided with an easily separable portion at one end of the main body for shortening the length from the fixing portion to the other end, the easily separable portion having a discontinuous through groove formed by leaving a part of the circumferential direction of the main body as a connecting portion, and the length to one end of the main body can be shortened by breaking the connecting portion. This makes it easier to pry open the through-groove in the easily separable section with a tool such as a flathead screwdriver to break the connection, and also makes it easier to shorten the length from the fixing part to one end of the main body depending on the surrounding environment of the through-hole.

[0011] The airtight sealing device according to claim 5 is further characterized in that the easily separable portion comprises an annular groove extending along the circumferential direction of the main body, and a through groove is provided in a part of the direction in which the groove extends. The length of the connecting portion of the groove is longer than the length of the through groove. This allows for a clean separation of one end of the main body along the groove. On the other hand, the thin-walled portion of the groove is long and does not easily break, making it easy to handle during tasks such as installing airtight sealing devices.

[0012] The airtight sealing device according to claim 6 further comprises a clamping body having a clamping portion for tightening and compressing wiring and piping materials in the outer peripheral direction, the other end of the main body having an attachment portion to which the clamping body can be attached, and the clamping body can be attached to the attachment portion from the other end of the main body after the sealing material has been filled inside. This allows the clamping portion attached to the mounting portion to clamp the wiring / piping material, making it difficult for the wiring / piping material to move axially, thereby maintaining the relative position between the wiring / piping material and the sealing material.

[0013] The airtight sealing structure of claim 7 is characterized in that the airtight sealing device described in claim 1 is fixed to the through hole, the wiring and piping material is arranged in the arrangement path, the sealing material is filled in the main body, and in order to restrict the axial movement of the wiring and piping material, the portion of the wiring and piping material exposed from the other end of the main body is clamped by a clamping portion positioned relative to the other end of the main body. This will result in the same operation as in claim 6. [Effects of the Invention]

[0014] Since the airtight processing tool is erected from the wall portion in a state where it is fixed to the wall portion, its presence can be made conspicuous, making it easier to notice the airtight processed location, and it is possible to call the attention of workers walking in the vicinity not to come into contact with the airtight processed location. As a result, it is possible to prevent the adhesion state between the wiring / wiring pipes and the sealing material from being impaired by vibrations or impacts caused by workers accidentally stepping on the airtight processing tool, etc., and it is possible to prevent a gap from being formed between the sealing material and the wiring / wiring pipes by tripping or stepping on the bent portions of the wiring / wiring pipes around the airtight processing tool. As a result, the airtightness around the wiring / wiring pipes penetrating the wall portion of the clean room can be maintained.

Brief Description of the Drawings

[0015] [Figure 1] The airtight processing tool of the first embodiment of the present invention is shown, (a) is a front view, and (b) is a cross-sectional view taken along the cutting line A-A of (a). [Figure 2] The airtight processing tool of FIG. 1 is shown, (a) is a plan view, and (b) is a cross-sectional view taken along the cutting line B-B of (a). [Figure 3] The main body portion of FIG. 1 is shown, (a) is a perspective view seen from obliquely above, and (b) is a perspective view seen from obliquely below. [Figure 4] The receiving member of FIG. 1 is shown, (a) is a perspective view seen from obliquely above, (b) is a perspective view seen from obliquely below, (c) is a plan view, (d) is a front view, and (e) is a cross-sectional view taken along the cutting line C-C of (d). [Figure 5] It is a perspective view showing the state where the airtight processing tool of FIG. 1 is fixed to the through-hole of the wall portion. [Figure 6] It is a longitudinal sectional view of the airtight processing tool of FIG. 5. [Figure 7] It is a longitudinal sectional view showing the state where the airtight processing tool of FIG. 6 is filled with a sealing material. [Figure 8] It is a perspective view of the airtight processing tool of the second embodiment of the present invention. [Figure 9] It is an exploded perspective view of the airtight processing tool of FIG. 8. [Figure 10] It is a longitudinal sectional view of the airtight processing tool of FIG. 8. [Figure 11] Figure 8 is a longitudinal cross-sectional view showing the airtight sealing device fixed to a through-hole in the wall. [Figure 12] Figure 11 is a longitudinal cross-sectional view of the main part of the airtight sealing device. [Modes for carrying out the invention]

[0016] <First Embodiment> First, the airtight sealing device of the first embodiment of the present invention will be described with reference to Figures 1 to 7. The airtight sealing device 1A of the first embodiment is used to airtightly seal a section of a wall 50, such as a ceiling, that has a through-hole 51 for passing wiring and piping materials through. It comprises a main body 10 through which wiring and piping materials are inserted and one end of which is inserted into the through-hole 51, a fixing part 20 fixed to the wall 50, and a receiving part 31 that receives a sealing material 34 filled inside the main body 10, and is erected on the wall 50. In this embodiment, wiring materials 60 such as cables are exemplified as wiring and piping materials. The ceiling of the wall 50 has sufficient strength for workers to walk on its upper surface for work or inspection.

[0017] First, as shown in Figures 1-3, the main body 10 is formed in a roughly cylindrical shape from synthetic resin, metal, etc., with both ends open and having an internal routing path 11 for the wiring material 60. One end of the main body 10, that is, the part below approximately the midpoint height of the main body 10 in Figure 1, is inserted into the through hole 51 of the wall 50 to prevent the wiring material 60 from being scratched by contact with the periphery of the through hole 51. One end of the main body is formed with an outer diameter slightly smaller than the through hole 51 of the wall 50.

[0018] A ring-shaped step 12 is formed at approximately the midpoint in the height direction of the main body 10, and the inner circumferential surface 13a above a predetermined length from the step 12 has a slightly smaller diameter than the inner circumferential surface 13a of other parts. On the other hand, at the other end of the main body 10, that is, above approximately the midpoint height of the main body 10 in Figure 1, a ring-shaped step 14 is formed at approximately the midpoint in the height direction, and the inner circumferential surface 13a above the step 14 is slightly larger than the part between the step 12 and the step 14.

[0019] On one end of the main body portion 10, multiple easily divisible portions 15 are provided at vertical intervals to shorten the length from the fixing portion 20 to the end, i.e., the lower end of the main body portion 10 in Figure 1. The easily divisible portion 15 has a discontinuous through groove 18 formed by leaving a part of the circumferential direction of the main body portion 10 as a connecting portion 17. As shown in Figure 3, the easily divisible portion 15 has an annular recessed groove 16 extending along the circumferential direction of the main body portion 10, and the through groove 18 is provided in a part of the direction in which the recessed groove 16 extends. That is, the easily divisible portion 15 has an annular recessed groove 16 formed along the circumferential direction of the main body portion 10, with a discontinuous through groove 18 provided in a part of it, and the part of the recessed groove 16 other than the through groove 18 is the connecting portion 17. The through groove 18 is formed to a predetermined length at two locations in the recessed groove 16 that are 180 degrees apart in the circumferential direction and facing each other. The length extending of the connecting portion 17 is formed to be greater than the through groove 18 in the circumferential direction of the main body portion 10.

[0020] The easily separable section 15 allows the length of one end of the main body 10 to be shortened by inserting the tip of a tool such as a flathead screwdriver into the through groove 18 and prying to break the connecting section 17 in the recessed groove 16. By separating the main body 10 through breaking, the length of one end from the fixing section 20 to the end can be adjusted to a length corresponding to the wall thickness of the through hole 51.

[0021] An attachment portion 19 is formed on the other end of the main body portion 10, that is, on the upper end of the main body portion 10 in Figure 1. The inner surface of the attachment portion 19 has a female threaded portion 19a, which allows the clamping body 40 of the second embodiment, which will be described later, to be attached.

[0022] The fixing portion 20 is provided at approximately the midpoint between one end of the main body portion 10 and the other end, i.e., the upper end of the main body portion 10 in Figure 1, and is fixed to the wall portion 50. The fixing portion 20 is provided on an annular flange portion 21 that protrudes outward from approximately the midpoint of the main body portion 10 in the circumferential direction. As shown in Figure 2(a), the flange portion 21 is formed in the shape of a disc or an oval plate, and screw insertion grooves 21a are formed by notches at three locations on the periphery through which screws 23 for fixing to the wall portion 50 are inserted.

[0023] An annular packing 22 is provided in the flange portion 21 so as to surround the through hole 51 between it and the wall portion 50. In this embodiment, double-sided adhesive tape is used as the packing 22. Figure 3 shows the main body portion 10 before the packing 22 is provided.

[0024] The fixing part 20 abuts against the periphery of the through hole 51 in the wall part 50, determining the insertion amount of one end of the main body part 10 into the through hole 51. The main body part 10 is fixed to the wall part 50 by the fixing part 20, and the other end is positioned vertically so as to be spaced apart from the wall part 50.

[0025] The receiving portion 31 is located approximately midway in the height direction within the installation path 11 of the main body portion 10, and as shown in Figure 4, it is provided at the lower end of the cylindrical receiving member 30. The receiving portion 31 receives the sealing material 34 that is filled into the main body portion 10 from the other end side, and prevents the sealing material 34 from leaking out to the one end side of the main body portion 10.

[0026] The receiving member 30 is made of a soft material such as rubber or elastomer and is inserted into the small-diameter peripheral wall 13 of the main body 10 between the stepped portion 12 and the upper stepped portion 14. The receiving member 30 has an annular flange 32 integrally formed at its lower end, and the upper surface of the flange 32 abuts against the stepped portion 12 of the main body 10, restricting insertion beyond that point. The outer diameter of the peripheral wall 33 of the receiving member 30 is the same as or slightly larger than the inner diameter of the peripheral wall 13 of the main body 10, and it is inserted into the main body 10.

[0027] Slightly below the fixing portion 20 on the peripheral wall 13 at one end of the main body 10, two small protrusions 13b are provided facing each other, slightly projecting radially within the installation path 11. The distance between the lower surface of the stepped portion 12 and the small protrusions 13b is formed to be approximately the same as the thickness of the flange 32 of the receiving member 30. The receiving member 30 is inserted into the installation path 11 from the lower end opening of the main body 10, and at approximately the midpoint height of the main body 10, the flange 32 elastically moves over the small protrusions 13b and is housed between the lower surface of the stepped portion 12 and the small protrusions 13b. After housing, the upper surface of the flange 32 abuts against the stepped portion 12, restricting upward movement, and the lower surface of the flange 32 abuts against the small protrusions 13b, restricting downward movement. As a result, the receiving member 30 is held at a constant height position within the installation path 11 of the main body 10.

[0028] Furthermore, the receiving member 30 has an open upper end and its lower end is closed by a receiving portion 31 that can be opened. The receiving portion 31 is formed of six fan-shaped pieces 31a that close the lower end opening, and the fan-centered side elastically flexes vertically with the arc portion 31b joined to the inner surface of the peripheral wall 33 of the receiving member 30 as the base end, allowing the wiring material 60 to be inserted into the receiving portion 31. The vertical groove 33a formed in a part of the peripheral wall 33 of the receiving member 30 slightly reduces the diameter of the peripheral wall 33 when it is pressed into the main body 10, making insertion easier.

[0029] As shown in Figure 7, the distance L1 between the receiving portion 31 and the other end of the main body portion 10 is set to be greater than the required filling length L2 of the sealing material 34 in the direction in which the wiring material 60 of the wiring path 11 is laid.

[0030] Next, we will explain how to attach the airtight sealing device 1A, configured as described above, to the through hole 51 and how to perform airtight sealing in the through hole 51. The airtight sealing device 1A is attached to the flange portion 21 of the fixing portion 20 by attaching double-sided adhesive tape as packing 22, then positioning the flange portion 21 on the peripheral wall portion 50 of the through hole 51 and bonding it, and finally inserting screws 23 into the screw insertion grooves 21a of the flange portion 21 to attach and fix it to the wall portion 50.

[0031] Next, as shown in Figures 5 and 6, the wiring material 60 is inserted through the other end opening of the airtight sealing device 1A into the routing path 11 of the main body 10, and then connected to the electrical equipment 61 located below the ceiling. After that, the sealing material 34 is injected through the other end opening of the airtight sealing device 1A and filled into the gap S between the inner circumferential surface 13a of the main body 10 and the outer circumferential surface of the wiring material 60, as shown in Figure 7. Since a receiving portion 31 is provided in the routing path 11 of the airtight sealing device 1A, the sealing material 34 is filled up to the position of the receiving portion 31. After the airtight sealing device 1A is installed, the wiring material 60 comes out upward from the other end opening of the airtight sealing device 1A, bends, and is routed along the upper surface of the ceiling. Alternatively, the airtight sealing device 1A may be fixed to the wall 50 after the wiring material 60 has been inserted into it first.

[0032] Next, the operation of the airtight sealing device 1A of the first embodiment will be explained. Since the airtight sealing device 1A is fixed to the wall 50 and positioned vertically from the wall 50, its presence is conspicuous, making it easy to notice the airtight sealed area and alerting workers walking nearby not to step on the airtight sealed area. This prevents the deterioration of the adhesion between the wiring material 60 and the sealing material 34 due to vibrations or impacts caused by workers accidentally stepping on the airtight sealing device 1A, and prevents cracks or gaps from forming between the outer surface of the wiring material 60 and the sealing material 34 due to workers tripping over or stepping on bends in the wiring material 60 around the airtight sealing device 1A. As a result, the airtight state of the area where the wiring material 60 penetrates the through-hole 51 in the wall 50 of the cleanroom can be maintained.

[0033] Furthermore, since the distance L1 between the receiving portion 31 and the other end of the main body portion 10 is greater than the required filling length L2 of the sealing material 34, the airtight sealing device 1A is long, has a noticeable presence, and is therefore more likely to make its presence known to workers and others. In addition, if the portion of the wiring material 60 located outside the main body 10 is kicked or otherwise moved, the moving wiring material 60 will come into contact with the inner circumferential surface 13a on the other end of the main body 10, suppressing further movement. This prevents deformation of the filled sealant 34 or the formation of cracks or gaps between the sealant 34 and the wiring material 60, thereby preventing the airtight seal from being compromised.

[0034] Furthermore, since the fixing portion 20 is provided on the flange portion 21 which is formed to protrude outward from the main body portion 10, airtightness can be ensured over a wide area, including the periphery of the through hole 51. Furthermore, since an annular packing 22 is provided on the flange portion 21, airtightness is enhanced.

[0035] In addition, a detachable portion 15 is provided on one end of the main body portion 10, and the detachable portion 15 has a discontinuous through groove 18. Therefore, the connecting portion 17 can be easily broken by prying the through groove 18 of the detachable portion 15 with a tool such as a flathead screwdriver, and the length of one end of the main body portion 10 can be easily shortened and adjusted according to the surrounding environment of the through hole 51.

[0036] Furthermore, since the easily separable portion 15 is equipped with an annular groove 16, one end of the main body portion 10 can be cleanly separated along the groove 16. In addition, a through groove 18 is provided in part of the direction in which the recessed groove 16 extends, and in the circumferential direction of the main body 10, the length of the connecting portion 17 of the recessed groove 16 is longer than the through groove 18, so the thin-walled portion of the connecting portion 17 is long, and the easily detachable portion 15 does not break off easily. For this reason, there is no need to pay excessive attention to prevent the airtight sealing device 1A from being broken off at a portion other than the predetermined height during handling, making it easy to handle.

[0037] <Second Embodiment> Next, the airtight sealing device 1B of the second embodiment will be described. The airtight sealing device 1B of the second embodiment, compared to the airtight sealing device 1A of the first embodiment, is further equipped with a clamping body 40 at the other end of the main body 10, as shown in Figures 8 to 12. As described above, the other end of the main body 10 is provided with an attachment portion 19 to which the clamping body 40 can be attached.

[0038] The clamping body 40 is equipped with a clamping section 41 that tightens and compresses the wiring material 60 in the outer direction. As shown in Figures 9 and 10, the clamping body 40 is composed of a clamping body body 42, a packing 43, a packing tightening member 44, and a nut 45, of which the packing 43 and the packing tightening member 44 constitute the clamping section 41. The axes of these components and the airtight sealing device 1A are all on the same straight line. In the description of the clamping body 40, one side and one end of the clamping body 40 and each member refer to the side and edge attached to the main body 10, i.e., the lower side and lower end in Figures 8-10, respectively, while the other side and other end refer to the opposite side and opposite edge from the main body 10, i.e., the upper side and upper end in Figures 8-10.

[0039] The clamping body 42 is cylindrical, and a wiring material 60 is inserted axially inside it. A hexagonal plate-shaped intermediate flange 42a is provided in the axial middle of the clamping body 42, and male threaded portions 42b and 42c are provided on the outer surfaces of one and the other axial sides of the flange 42a. The outer surface on one side is attached to the attachment portion 19 of the main body 10. The outer surface on the other side is inserted into and attached to the inside of the nut 45. A contact surface 42e consisting of an annular stepped surface is provided slightly inside the other side opening 42d on the inner circumferential surface of the other side of the clamping body 42, and one end surface 43a of the packing 43 inserted inside from the other side opening 42d abuts against it, preventing the packing 43 from entering any further inside.

[0040] The packing 43 is roughly cylindrical and made of an elastic material such as rubber or elastomer. One end of the packing 43 is inserted into the contact surface 42e on the other side of the clamping body 42, and the other end is inserted through one end opening of the packing tightening member 44 and fitted inside.

[0041] The packing tightening member 44 is generally cylindrical in shape and has a narrow ring-shaped end 44a at one end. The packing tightening member 44 also has a tightening peripheral wall portion 44b that extends axially from the ring-shaped end 44a as the base end and is deformable by gradually narrowing in the radial direction, and a hook claw 44c that bends radially inward at the tip of the tightening peripheral wall portion 44b and engages with the other end face of the packing 43. The tightening peripheral wall portion 44b is formed by providing a large number of comb teeth 44d extending from the ring-shaped end 44a to the other end via a slit 44e along the circumferential direction. The packing tightening member 44 is placed over the other end of the packing 43, and the other end elastically deforms integrally with the packing 43, tightening the packing 43 radially inward.

[0042] The nut 45 is formed in a hexagonal cylindrical shape, and a female threaded portion 45a is provided on the inner circumferential surface of one end, which engages with the male threaded portion 42c of the clamping body 42. The nut 45 has a bottom portion 45b on the other end, which bulges out while tapering towards the tip, and an insertion opening 45c into which the wiring material 60 is inserted is provided in the center of the bottom portion 45b. Furthermore, a tapering inclined surface 45d is formed on the inner surface of the bottom portion 45b, which slopes in an inclination that gradually decreases in diameter from one end to the other end along the axial direction. The tapering inclined surface 45d is formed to press the outer edge 44f of the other end of the packing tightening member 44 inward as the nut 45 is tightened while being attached to the other end of the clamping body 42.

[0043] Of these components, the clamping body 42, the packing tightening member 44, and the nut 45 are made of synthetic resin, metal, etc., and basically have a certain degree of rigidity.

[0044] Next, the attachment of the airtight sealing device 1B of the second embodiment to the through hole 51 of the wall portion 50 and the airtight sealing process in the through hole 51 will be described. The airtight sealing device 1B is prepared by first inserting the wiring material 60 into the inside of the clamping body 40 through the insertion opening 45c of the nut 45 of the clamping body 40, and then pulling out the end of the wiring material downwards from one end opening, i.e., the lower end opening, of the clamping body 42.

[0045] In that state, in the same manner as in the first embodiment, first, the airtight sealing device 1A is attached to the through hole 51 in the wall portion 50. Then, while further pulling out the wiring material 60 from the clamping body 40, it is inserted into the routing path 11 of the main body portion 10 from the other end opening of the airtight sealing device 1A and connected to the electrical equipment 61 located on the lower surface of the ceiling. Subsequently, the sealing material 34 is injected from the other end opening of the airtight sealing device 1A and filled into the gap S between the inner circumferential surface 13a of the main body portion 10 of the airtight sealing device 1A and the outer circumferential surface of the wiring material 60, as shown in Figure 11.

[0046] Next, the clamping body 40 is attached to the airtight sealing device 1A by gripping the intermediate flange 42a of the clamping body 42 and screwing the male threaded portion 42b into the female threaded portion 19a of the attachment portion 19 of the main body 10. The clamping body 42 stops screwing when the intermediate flange 42a comes into contact with the peripheral edge of the other end opening of the main body 10.

[0047] Subsequently, as the nut 45 is tightened against the clamping body 42, as shown in Figure 12, the tapered inclined surface 45d of the nut 45 moves axially from the initial position shown by the dashed line, pushing in the outer edge 44f of the other end of the packing tightening member 44. Then, as shown by the solid line, the tightening peripheral edge 44b of the packing tightening member 44 bends radially with the ring-shaped end 44a as its base, and following this, presses the other end of the packing 43 radially. As a result, the other end of the packing 43 bends radially while its diameter decreases, and eventually the inner peripheral edge of the other end face 43b of the packing 43 comes into contact with the outer peripheral surface of the wiring material 60 inside the clamping body 40, and is further clamped and tightened by the clamping portion 41, which consists of the packing 43 and the packing tightening member 44 and is positioned relative to the other end of the main body 10. This prevents the wiring material 60 from moving in the axial direction and holds it in a fixed position. With this, the installation of the airtight sealing device 1B into the through hole 51 is completed, and the airtight sealing work in the through hole 51 is finished.

[0048] From the airtight sealing device 1B of the second embodiment, the following airtight sealing structure can also be understood. In other words, the airtight sealing device 1A is fixed to the through hole 51, the wiring material 60 is arranged in the installation path 11, the sealing material 34 is filled inside the main body 10, and in order to restrict the axial movement of the wiring material 60, the portion of the wiring material 60 exposed from the other end of the main body 10 is clamped by a clamping portion 41 positioned relative to the other end of the main body 10, thus forming an airtight sealing structure.

[0049] Next, the operation of the airtight sealing device 1B and the airtight sealing structure of the second embodiment will be explained. Since the airtight sealing device 1B is equipped with the airtight sealing device 1A of the first embodiment, it is positioned vertically from the wall 50, just like the airtight sealing device 1A, making its presence conspicuous and alerting workers and others not to step on the airtight sealed area or trip over the wiring material 60 around the installation site, thereby preventing cracks or gaps from forming between the sealing material 34 and the wiring material 60.

[0050] In addition, the airtight sealing device 1B is equipped with a clamping body 40, the clamping portion 41 of which clamps the wiring material 60, making it difficult for the wiring material 60 to move in the axial direction. This maintains the relative position between the wiring material 60 and the sealing material 34, preventing them from shifting relative to each other in the axial direction. As a result, it is more effective in preventing the sealing material 34 from being pulled and deformed in the axial direction by the wiring material 60 getting caught on something, which would cause cracks or gaps to form between the sealing material 34 and the wiring material 60 and impair airtightness, and the airtight state at the point where the wiring material 60 penetrates the through hole 51 can be maintained more stably.

[0051] By the way, although the above embodiments show wiring material 60 as wiring and piping material, the present invention can also be applied to piping materials such as water supply pipes and hot water supply pipes.

[0052] Furthermore, although the receiving portion 31 of the airtight sealing device in each of the above embodiments is provided separately from the main body portion 10 because it is made of a soft material, it is not limited to this, and may be integrally formed from the same material as the main body portion 10. In addition, although the receiving portion 31 is provided at approximately the midpoint of the height of the main body portion 10, it may be provided at other locations as well.

[0053] Furthermore, the receiving portion 31 is made of a fan-shaped piece 31a and opens and closes elastically, but it may also be provided with an insertion hole through which wiring and piping materials are inserted in advance, and the wiring and piping materials may be in close contact with the periphery of the insertion hole. Furthermore, the receiving portion 31 may be configured such that a through hole for inserting wiring and piping materials is formed by punching out by knocking. In this case, the receiving member 30 can be made of a hard resin, or it can be formed integrally with the main body portion 10 using the same material. In this case, the stepped portion 12 of the peripheral wall 13 of the main body portion 10 becomes unnecessary, and the formation of small protrusions 13b also becomes unnecessary.

[0054] Furthermore, although the circumferential length of the connecting portion 17 of the easily separable portion 15 of the main body portion 10 is formed to be longer than the through groove 18, it may be the same length as or shorter than the through groove 18. Furthermore, although the through grooves 18 of the easily separable portion 15 are formed in two opposing locations, they may be formed in three or more locations. In addition, the connecting portion 17 of the easily separable portion 15 is broken by inserting the tip of a tool such as a flathead screwdriver into the through groove 18 and prying it open, but the method of breaking is not limited to this method. Furthermore, the easily separable portion 15 is formed having a discontinuous through groove 18 created by leaving a part of the circumferential direction of the main body portion 10 as a connecting portion 17, but it is not limited to this configuration.

[0055] In addition, one end of the main body 10 is provided with an easily separable portion 15 so that the length from the fixing portion 20 to the end can be shortened, but it is not necessarily required that it be shortenable. Furthermore, the easily separable section 15 may also be provided on the other end of the main body 10. This makes it possible to adjust the height at which the main body 10 is erected from the wall 50 on the other end according to the surrounding environment.

[0056] In each embodiment, the packing 22 provided on the flange portion 21 of the fixing portion 20 is made of double-sided adhesive tape, but it may be made of other materials. Also, the packing 22 is not necessarily required.

[0057] Furthermore, in the second embodiment, the airtight sealing device 1B is filled with sealing material 34. However, if strict airtight sealing is not required, the sealing material 34 may not be filled, and the packing 43 of the clamping body 40 may be tightened with the packing tightening member 44 to clamp the wiring material 60, thereby providing airtight sealing with the clamping body 40 alone.

[0058] Furthermore, the configuration of the clamping body 40 is not limited to that shown in the second embodiment. In addition, the clamping method of the clamping body 40 is not limited to clamping by packing 43. That is, since the airtight sealing device 1B of the second embodiment is sealed by the sealing material 34, the clamping body 40 does not need to have an airtight function by packing 43 or the like in the restricting portion, as long as it can clamp and restrict the movement of the wiring material 60.

[0059] Furthermore, when implementing the present invention, a cylindrical body may be added to the attachment portion 19 on the other end of the main body portion 10 to make its presence more conspicuous, or fluorescent paint may be applied to the top of the airtight sealing device or clamping body 40, or fluorescent tape may be attached to make the presence of the airtight sealing device more conspicuous.

[0060] Although the airtight sealing device in each embodiment is described as being attached to a through-hole 51 provided in the ceiling as a wall portion 50, the present invention is also applicable to cases where it is attached to a through-hole 51 provided in a wall portion 50 such as a side wall that is prone to contact by people or objects. [Explanation of Symbols]

[0061] 1A: Airtight sealing device of the first embodiment, 1B: Airtight sealing device of the second embodiment, 10: Main body, 11: Installation route, 15: Easily separated part, 16: Recessed groove, 17: Connection part, 18: Through groove, 19: Attachment part, 20: Fixing part, 21: Flange part, 22: Packing, 30: Receiving member, 31: Receiving part, 34: Sealing material, 40: Clamping body, 41: Clamping part, 42: Clamping body body, 43: Packing, 44: Packing tightening member, 45: Nut, 50: Wall part, 51: Through hole, 60: Wiring material, L1: Distance between the receiving part and the other end of the main body, L2: Required filling length of the sealing material, S: Gap between the inner circumferential surface of the main body and the outer circumferential surface of the wiring material.

Claims

1. An airtight sealing device for sealing areas where wiring and piping materials are installed so as to pass through through holes formed in a wall, A main body having an internal routing path for the wiring and piping material with both ends open, and one end of which is inserted into the through hole, A fixing part is provided between one end and the other end of the main body, which abuts against the periphery of the through hole in the wall to determine the insertion amount on the one end side, and is fixed to the wall, A receiving portion located within the installation path of the main body, which receives the sealing material that is filled into the interior from the other end of the main body, Equipped with, An airtight sealing device characterized in that, while fixed to the wall by the fixing part, the other end of the main body is positioned upright on the wall so as to be spaced apart from the wall.

2. The airtight sealing device according to claim 1, characterized in that the distance between the receiving portion and the other end of the main body portion is greater than the required filling length of the sealing material in the direction in which the wiring and piping materials are laid out along the installation path.

3. The fixing portion is provided on an annular flange portion that protrudes outward from the main body portion so as to surround it in the circumferential direction. The airtight sealing device according to claim 2, characterized in that an annular packing is provided on the flange portion so as to surround the through hole and interposed between it and the wall portion at the periphery of the through hole.

4. One end of the main body is provided with an easily detachable section for shortening the length from the fixing section to the one end. The airtight sealing device according to any one of claims 1 to 3, characterized in that the easily separable portion has a discontinuous through groove formed by leaving a part of the circumferential direction of the main body as a connecting portion, and the length to one end of the main body can be shortened by breaking the connecting portion.

5. The easily separable portion is provided with an annular groove extending along the circumferential direction of the main body, and the through groove is provided in a part of the direction in which the groove extends. The airtight sealing device according to claim 4, characterized in that the length extending from the connecting portion of the groove is longer than the through groove.

6. The clamping body further comprises a clamping section that tightens and compresses the aforementioned wiring and piping material in the outer direction, The other end of the main body is provided with an attachment portion to which the clamping body can be attached. The airtight sealing device according to claim 1, characterized in that the clamping body can be attached to the attachment portion after the sealing material has been filled inside from the other end of the main body.

7. An airtight sealing structure characterized in that the airtight sealing device described in claim 1 is fixed to the through hole, the wiring and piping material is arranged in the arrangement path, the sealing material is filled in the main body, and in order to restrict the axial movement of the wiring and piping material, the portion of the wiring and piping material exposed from the other end of the main body is clamped by a clamping portion positioned relative to the other end of the main body.

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