Sleeve pipe and piping structure

Abstract

To provide a sleeve pipe which inhibits a seal material from falling from a flange to the indoor side, and to provide a pipe structure.SOLUTION: A sleeve pipe 12 includes: a cylindrical sleeve pipe body 20 having a flange part 22 at one axial side; a seal material 32 which is disposed at the other axial side relative to the flange part 22 and has an annular part 34 formed in an annular form along the other axial surface of the flange part 22 and a protruding part 36 which protrudes from an inner end as seen in a radial direction at the annular part 34 to the other axial side.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a sleeve pipe and a piping structure. [Background technology]

[0002] Patent Document 1 discloses an exterior wall through-piping structure comprising: a cylindrical sleeve pipe that is inserted into and fixed in a through-hole formed in an exterior wall material; a plate that is fixed so as to cover the outdoor end of the sleeve pipe; a joint that is formed through the plate and supported by the plate, and has an indoor pipe joint that can connect indoor piping on the indoor side of the plate and an outdoor pipe joint that can connect outdoor piping on the outdoor side of the plate; indoor piping that is connected to the indoor pipe joint; and outdoor piping that is connected to the outdoor pipe joint, wherein the plate is detachably fixed to the outdoor side of the sleeve pipe, and the indoor piping has an excess length that can be pulled out to the outdoor side of the sleeve pipe.

[0003] The sleeve pipe is cylindrical and made of resin, with an expanded diameter flange at the outdoor end. The flange is located close to the bottom of a recess formed by cutting into the outdoor edge of the exterior wall through-hole in the exterior wall material, with a ring-shaped outdoor sealing material made of an elastic material such as synthetic rubber sandwiched between them. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-162128 Summary of the Invention [Problem to be solved by the invention]

[0005] In the configuration described in Patent Document 1, when the outdoor sealant is fitted into the sleeve pipe in an expanded state, the outdoor sealant may warp and tilt from its parallel position to the flange toward the indoor side. If the outdoor sealant is fixed to the exterior wall material in this state, there is a risk that sufficient watertightness between the flange and the recessed portion will not be achieved.

[0006] The present invention aims to provide a sleeve pipe and a piping structure in which the sealing material is prevented from collapsing from the flange toward the indoor side. [Means for solving the problem]

[0007] A sleeve pipe according to a first aspect of the present disclosure comprises a cylindrical sleeve pipe body having a flange portion on one axial side, and a sealing material arranged on the other axial side of the flange portion, the sealing material having an annular portion formed in a ring shape along a surface of the flange portion on the other axial side, and a protruding portion protruding from a radially inner end of the annular portion to the other axial side.

[0008] With this sleeve pipe, the sealing material has a protrusion that protrudes from the radially inner end of the annular portion toward the other axial direction, so that the sealing material is less likely to warp even when it is expanded in diameter and attached to the sleeve pipe, thereby reducing the risk of the sealing material collapsing toward the other axial direction.

[0009] A sleeve pipe according to a second aspect of the present disclosure is the sleeve pipe according to the first aspect, wherein the sleeve pipe main body has a recess on the outer surface on the other side in the axial direction than the flange portion, and the sealing material covers the recess from the outside in the radial direction.

[0010] With this sleeve pipe, the sealing material covers the recess provided on the outer periphery of the sleeve pipe body from the radial outside, thereby reducing the risk of the mounting part coming off the recess when it is placed in the recess, for example.

[0011] A sleeve pipe according to a third aspect of the present disclosure is the sleeve pipe described in the first or second aspect, further comprising a restricting member that is positioned on the outer surface of the sleeve pipe body on the other side in the axial direction of the sealing material and restricts movement of the sealing material to the other side in the axial direction.

[0012] With this sleeve tube, the restricting member restricts the movement of the sealing material to the other axial side, thereby reducing the risk of the sealing material coming off the flange to the other axial side during transportation.

[0013] a joint formed through the plate and supported by the plate, the joint having a one-side pipe connection portion to which a one-side pipe can be connected on the one side in the axial direction and a other-side pipe connection portion to which a other-side pipe can be connected on the other side in the axial direction of the plate; the one-side pipe connected to the one-side pipe connection portion; and the other-side pipe connected to the other-side pipe connection portion with an excess length that can be pulled out to the one side in the axial direction of the sleeve pipe body. The sealing material has an outer diameter smaller than the outer diameter of the flange portion when the sleeve pipe is inserted into a through hole having a small diameter portion and a large diameter portion formed in a wall member and fastened to the wall member. The sealing material is in close contact with a surface on the other side in the axial direction of the flange portion and a step surface between the small diameter portion and the large diameter portion of the wall member, and has a gap with an inner peripheral surface in the radial direction of the large diameter portion.

[0014] According to this piping structure, the sealing material adheres to the other axial side surface of the flange portion and the step surface between the small diameter portion and the large diameter portion of the wall member, and since the outer diameter is smaller than that of the flange portion, it does not come into contact with the radial inner surface of the large diameter portion.Therefore, when fastening the sleeve tube to the wall member, the sealing material is prevented from being caught between the radial inner surface of the large diameter portion of the wall member and the radial outer surface of the flange portion, which would increase the fastening load when fastening the sleeve tube.

[0015] In addition, the one-side piping and the other-side piping are connected to a joint that is formed through a plate that covers one axial end of the sleeve pipe and is supported by the plate, and the one-side piping and the other-side piping are supported in communication within the main body of the sleeve pipe, making it easy to install the piping structure.

[0016] In addition, the plate is removably fixed to the other axial side of the sleeve pipe, and the piping on one side has an excess length that can be pulled out to the other side of the sleeve pipe. Therefore, by removing the plate from the sleeve pipe and pulling it to the other axial side, the piping on one side is pulled out, and the connection point between the joint and the piping on one side can be visually inspected. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide a sleeve pipe and a piping structure in which the sealing material is prevented from collapsing from the flange toward the indoor side. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 4 is a cross-sectional view illustrating a state in which a sleeve tube according to one embodiment is fastened to a wall member. [Figure 2] FIG. 2 is an exploded view of a sleeve tube according to one embodiment. [Figure 3] FIG. 2 is a cross-sectional view of a sleeve tube according to one embodiment. [Figure 4] 10 is a cross-sectional view illustrating a state in which a sleeve tube is fastened to a wall member with a sealing material of the sleeve tube in close contact with the wall member according to one embodiment. FIG. [Figure 5] FIG. 10 is a cross-sectional view illustrating a state in which a sleeve tube is fastened to a wall member with a sealing material of the sleeve tube in close contact with the wall member according to a modified example of an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] An example of an embodiment of the present disclosure will be described below with reference to the drawings. In each drawing, the same or equivalent components and parts are designated by the same reference numerals. Furthermore, the dimensional proportions in the drawings are exaggerated for the sake of explanation and may differ from the actual proportions.

[0020] In the following description, the "axial direction" refers to the direction in which the sleeve tube 12 of the present disclosure extends, and coincides with the direction in which the sleeve tube 12 of the present disclosure extends when fixed to the wall member 90.

[0021] (composition) 1 to 4 are diagrams illustrating a piping structure 10 according to the present disclosure. As shown in Fig. 1, the piping structure 10 according to the present disclosure includes a sleeve pipe 12 fastened to a wall member 90, a plate 50 fixed to the sleeve pipe 12, a joint 60 supported by the plate 50, and one side pipe 66 and another side pipe 68 connected to the joint 60.

[0022] 1, the "one-side pipe 66" has a "first one-side pipe 66A" and a "second one-side pipe 66B," but will be referred to simply as the "one-side pipe 66" unless otherwise specified. The "other-side pipe connection portion 64" has a "first other-side pipe connection portion 64A" and a "second other-side pipe connection portion 64B," but will be referred to simply as the "other-side pipe connection portion 64" unless otherwise specified. The "one-side pipe connection portion 62" has a "first one-side pipe connection portion 62A" and a "second one-side pipe connection portion 62B," but will be referred to simply as the "one-side pipe connection portion 62" unless otherwise specified.

[0023] The wall member 90 is a member that has a thickness and extends in the vertical direction, and is, for example, the exterior wall of a house. The wall member 90 is formed with a through-hole 92 having a large diameter portion 92L on one side and a small diameter portion 92S on the other side, and one surface of the wall member 90 is formed with an uneven pattern that adds design value to the house, for example.

[0024] As shown in FIGS. 1, 3 and 4, the sleeve pipe 12 includes a sleeve pipe main body 20, a sealing material 32, and a nonwoven fabric 30.

[0025] The sleeve pipe body 20 is a cylindrical member having a flange portion 22 on one axial side, a plate mounting portion 44 that protrudes radially inward from an end radially inner than the flange portion 22, and a cylindrical portion 24 formed on the other axial side than the flange portion 22.

[0026] The flange portion 22 is a portion that is formed into a substantially circular ring shape when viewed from one side in the axial direction, and, for example, the radially inner end thereof coincides with the inner diameter of the sleeve pipe main body 20 .

[0027] In addition, a groove 46 is formed on one axial surface of the flange portion 22 between the radially outer end and the radially inner end, when viewed from one axial side, into which an O-ring 54, described later, fits.

[0028] 1 and 4, the flange portion 22 has a diameter larger than that of the small diameter portion 92S and fits into the large diameter portion 92L. In other words, when the cylindrical portion 24 of the sleeve pipe main body 20 is inserted into the through hole 92 from one axial side, the flange portion 22 is the portion that catches on the small diameter portion 92S of the through hole 92 of the wall member 90. The diameter of the flange portion 22 is, for example, 134 mm.

[0029] As shown in Figures 2 and 4, the plate mounting portions 44 are formed at four locations equally spaced circumferentially, and are portions into which the plate 50 is attached by inserting the plate fasteners 52 described later.

[0030] 1, 3, and 4, the cylindrical portion 24 has an outer peripheral surface formed in a male thread shape, a diameter slightly smaller than that of the small diameter portion 92S, and is capable of being inserted into the small diameter portion 92S. The outer diameter of the cylindrical portion 24 is, for example, 115.6 mm.

[0031] As shown in FIGS. 1, 3 and 4, the plate mounting portion 44 is formed with a recess 28 recessed radially inward.

[0032] As shown in Figures 1 and 4, the recess 28 is a portion into which a fastening nut 42, which is an example of an attachment part according to the present disclosure, is inserted from the radial outside to fasten the plate 50 together with a plate fastener 52 described later.

[0033] In other words, the recess 28 is a portion recessed from the radially outer side of the plate mounting portion 44 toward the radially inner side.

[0034] The recess 28 and the fastening nut 42 may have any shape, but as an example, the width of the recess 28 and the width of the fastening nut 42 when viewed from the axial direction are made equal to each other, thereby preventing the fastening nut 42 from rotating inside the recess 28 when viewed from the axial direction.

[0035] The sleeve pipe body 20 has a radially inner through-hole when viewed from the axial direction. This through-hole functions as an insertion portion 40 through which a joint 60 and a second-side pipe 68, which will be described later, pass.

[0036] The sleeve tube body 20 may be made of any material that is not easily deformed, and is made of a hard resin, for example.

[0037] 1 and 2, the sleeve pipe main body 20 is fixed by fastening to the wall member 90 by threading the cylindrical portion 24 into the female thread of a sleeve pipe fastener 38 (described later). This fastening procedure will be described later.

[0038] As shown in Figures 1 to 4, the sealing material 32 is a member provided on the other axial side of the flange portion 22, along the outer periphery of the sleeve pipe main body 20 and the flange portion 22, and as shown in Figures 1 and 4, when the sleeve pipe 12 is inserted into a through hole formed in the wall member 90 and fastened to the wall member 90, it comes into close contact with the surface on the other axial side of the flange portion 22 and the step surface between the small diameter portion 92S and the large diameter portion 92L of the wall member 90.

[0039] The sealing material 32 may be made of any material as long as it is made of a material that adheres tightly to the flange portion 22 and the wall member 90 as described above, but as an example, it is made of a material that has low fluid permeability and flexibility, such as EPDM rubber or Everlite Moran (registered trademark).

[0040] As shown in FIGS. 1 to 4, the sealing material 32 has an annular portion 34 and a protruding portion 36.

[0041] The annular portion 34 has a thickness in the axial direction and is formed into an annular shape when viewed from the axial direction, and has an outer diameter smaller than that of the flange portion 22 when the sealing material 32 is provided in the sleeve pipe main body 20. Furthermore, as will be described later, when the sleeve pipe main body 20 is fastened to the wall member 90, the outer diameter is smaller than that of the plate 50.

[0042] Furthermore, when the sealing material 32 is removed from the sleeve pipe main body 20, the annular portion 34 has an inner diameter smaller than that of the cylindrical portion 24, and when attached to the sleeve pipe main body 20, it applies a radially inward load to the sleeve pipe main body 20.

[0043] As an example, when the sealing material 32 is removed from the sleeve pipe main body 20, the annular portion 34 has an outer diameter of 128.5 mm, an inner diameter of 113.5 mm, and a thickness of 3 mm.

[0044] The protrusion 36 is a portion that protrudes from the radially inner end of the annular portion 34 to the other axial side, and is an annular portion whose inner diameter, for example, matches the inner diameter of the annular portion 34 when removed from the sleeve pipe main body 20.

[0045] As an example, as shown in FIG. 4, the outer shape of the protrusion 36 is such that when the sleeve tube 12 is inserted into the through-hole 92 formed in the wall member 90 and fastened to the wall member 90, it does not come into contact with the inner surface of the small diameter portion 92S and has a gap.

[0046] As an example, when the sealing material 32 is removed from the sleeve pipe main body 20, the protruding portion 36 has an outer diameter of 116 mm and an axial protruding length of 2.5 mm.

[0047] The nonwoven fabric 30 is an example of a "restricting member" according to the present disclosure, and as shown in Figures 1, 3, and 4, is a member that is positioned adjacent to the other axial side of the sealing material 32 when the sealing material 32 is provided in the sleeve tube main body 20, and restricts the movement of the sealing material 32 to the other axial side.

[0048] The nonwoven fabric 30 may be arranged by any method, but is arranged by being adhered to the outer circumferential surface of the cylindrical portion 24.

[0049] The outer diameter of the nonwoven fabric 30 is, for example, smaller than the inner diameter of the small diameter portion 92S of the wall member 90 in a state where it is adhered to the cylindrical portion 24.

[0050] As shown in Figures 1 to 4, the sleeve pipe fastener 38 is annular when viewed from the axial direction, and its inner surface is a female thread that screws into a male thread formed on the outer periphery of the cylindrical portion 24.

[0051] Furthermore, the radial outer side of the sleeve pipe fastener 38 may have any shape, but as an example, it is made approximately regular hexagonal when viewed from the axial direction, making it easy to grip when fastening.

[0052] The sleeve pipe fastener 38 may be made of any material, but as an example, it is made of a hard resin.

[0053] As shown in FIGS. 1 to 4, the plate 50 is a member formed in the shape of a circular flat plate when viewed from the axial direction.

[0054] When viewed from the axial direction, the plate 50 has an insertion hole 50H formed concentrically with the plate mounting portion 44 described above, and as shown in Figures 1 to 4, the plate 50 is detachably attached to one axial side of the flange portion 22 by a plate fastener 52, for example a bolt, and is fixed so as to cover the flange portion 22.

[0055] The plate 50 also holds the joint 60, which will be described later, in a state where the joint 60 is inserted through the radial center of the plate 50.

[0056] The plate 50 may be made of any material as long as it is capable of holding the joint 60, which will be described later, and is made of stainless steel, for example.

[0057] Furthermore, when the plate 50 "covers the flange portion 22," this refers to a state in which, when the plate 50 is fixed to the flange portion 22, the space on one side of the axial direction and the insertion portion 40 are kept watertight by, for example, an O-ring 54.

[0058] As shown in FIG. 1, the joint 60 is a member formed to penetrate the plate 50 and supported by the plate 50, and has a second pipe connection portion 64 on the other axial side of the plate 50 to which a second pipe 68 can be connected, and a first pipe connection portion 62 on one axial side of the plate 50 to which a first pipe 66 can be connected.

[0059] The other-side pipe connecting portion 64 is a portion to which the other-side pipe 68 is connected from the other axial side in a state in which the joint 60 is held by the plate 50 .

[0060] The other-side pipe connection portion 64 and the other-side pipe 68 may be connected in any manner. tube Connection 64The female thread formed on the other side of the pipe 68 is screwed onto the male thread formed on the other side of the pipe 68, thereby fastening the other side of the pipe 68 together.

[0061] The one-side pipe connecting portion 62 is a portion that is connected to the one-side pipe 66, similar to the other-side pipe connecting portion 64 and the other-side pipe 68 described above.

[0062] The joint 60 may be fixed to the plate 50 in any manner. As an example, as shown in FIG. 1, a male screw-shaped joint male screw 60M is inserted from the other axial side, and a joint nut 60F is screwed into the joint 60M from one axial side, thereby fastening the joint 60 to the plate 50.

[0063] The other side pipe 68 is a pipe that is connected to the other side pipe connecting portion 64 with an excess length that can be pulled out to one side in the axial direction of the sleeve pipe main body 20 .

[0064] The above-mentioned "having extra length that can be pulled out" means that when the sleeve tube 12 of the present disclosure is fixed to the wall member 90 and one side piping 66 and the other side piping 68 are connected to the joint 60 of the plate 50, and the plate 50 is removed, the other side piping 68 can be pulled out by the removed plate 50.

[0065] In other words, the above-mentioned "having extra length that can be pulled out" means that the length of the other side piping 68 may be determined appropriately as long as it is long enough so that the removal of the plate 50 is not restricted by the other side piping 68.

[0066] The one-side pipe 66 is a pipe connected to the one-side pipe connecting portion 62 .

[0067] As an example, the piping structure 10 according to the present disclosure is disposed at a position accessible to an operator inspecting the piping structure 10 from at least one side in the axial direction.

[0068] (Fastening procedure) Next, a procedure for obtaining a piping structure 10 using a sleeve pipe 12 according to the present disclosure will be described with reference to FIGS. 1 to 4 as appropriate.

[0069] First, as shown in FIG. 3, the fastening nut 42 is inserted into the recess 28 of the cylindrical portion 24, and the seal material 32 is provided along the flange, thereby covering the fastening nut 42 together with the recess 28 with the seal material 32.

[0070] Next, the nonwoven fabric 30 is wrapped around and adhered to the other axial side of the sealing material 32 along the circumferential direction of the cylindrical portion 24, thereby restricting movement of the sealing material 32 to the other axial side.

[0071] Next, as shown in Figures 2 and 4, the cylindrical portion 24 of the sleeve pipe body 20 is inserted into the through hole 92, and the sleeve pipe fastener 38 is screwed onto the cylindrical portion 24 from the other side of the wall member 90, thereby fastening the sleeve pipe body 20 to the wall member 90.

[0072] Next, the joint 60 is fastened to the plate 50 by screwing together the joint male screw 60M and the joint nut 60F.

[0073] In addition, the other side piping 68, with some excess length, is pulled out from the other side of the wall member 90 through the insertion portion 40 to one axial side of the wall member 90, and the other side piping 68 is connected to the other side pipe connection portion 64 of the joint 60.

[0074] Furthermore, one side pipe 66 is connected to one side pipe connecting portion 62 of joint 60 from one side of wall member 90 .

[0075] Next, with the O-ring 54 fitted into the groove 46 of the flange portion 22, the plate 50 is aligned with the flange portion 22 from one axial side, the plate fastener 52 is inserted into the insertion hole 50H, and the plate fastener 52 is screwed into the fastening nut 42 to fix the plate 50 so as to cover the flange portion 22.

[0076] (Action and effect) The sleeve pipe 12 and the piping structure 10 according to the present disclosure can provide the following functions and effects.

[0077] The sleeve pipe 12 according to the present disclosure comprises a cylindrical sleeve pipe body 20 having a flange portion 22 on one axial side, and a sealing material 32 arranged on the other axial side of the flange portion 22, the sealing material 32 having an annular portion 34 formed in a ring shape along the surface on the other axial side of the flange portion 22, and a protrusion 36 protruding from the radially inner end of the annular portion 34 on the other axial side.

[0078] Therefore, according to this sleeve pipe 12, the sealing material 32 has a protrusion 36 that protrudes from the radially inner end of the annular portion 34 to the other side in the axial direction, thereby reducing the risk of the sealing material 32 falling to the other side in the axial direction.

[0079] Furthermore, since only the protrusion 36 of the sealing material 32 protrudes from the annular portion 34, the overall increase in volume is suppressed compared to when the annular portion 34 is formed to the extent of the axial length of the protrusion 36.

[0080] Therefore, with this sleeve pipe 12, it is possible to prevent the seal material 32 from collapsing to the other side in the axial direction while suppressing an increase in the manufacturing cost of the seal material 32.

[0081] Furthermore, the sleeve pipe 12 according to the present disclosure has a recess 28 on the outer circumferential surface on the other axial side of the flange portion 22, and the seal material 32 covers the recess 28 from the radial outside.

[0082] Therefore, according to this sleeve pipe 12, the sealing material 32 covers the recess 28 provided on the outer periphery of the sleeve pipe main body 20 from the radial outside, so that when a fastening nut 42 is placed in the recess 28, for example, the risk of the fastening nut 42 coming off the recess 28 is reduced.

[0083] In addition, the sleeve pipe 12 according to the present disclosure further includes a nonwoven fabric 30 that is positioned on the outer surface of the sleeve pipe main body 20 on the other axial side of the sealing material 32 and restricts the sealing material 32 from moving to the other axial side.

[0084] Therefore, with this sleeve tube 12, the nonwoven fabric 30 restricts the movement of the sealing material 32 to the other axial side, reducing the risk of the sealing material 32 coming off the flange to the other axial side during transportation.

[0085] The piping structure 10 according to the present disclosure includes a sleeve pipe 12, a plate 50 that is detachable from one axial side of the flange portion 22 and fixed to cover the flange portion 22, a joint 60 that is formed through the plate 50 and supported by the plate 50, and has a one-side pipe connection portion 62 to which a one-side pipe 66 can be connected on one axial side of the plate 50 and a other-side pipe connection portion 64 to which a other-side pipe 68 can be connected on the other axial side of the plate 50, and a joint 60 that is connected to the one-side pipe connection portion 62. and the other side piping 68 connected to the other side pipe connecting portion 64 with an excess length that can be pulled out to one side in the axial direction of the sleeve pipe main body 20, and when the sleeve pipe 12 is inserted into a through hole 92 having a small diameter portion 92S and a large diameter portion 92L formed in the wall member 90 and fastened to the wall member 90, the sealing material 32 is in close contact with the other axial side surface of the flange portion 22 and the step surface between the small diameter portion 92S and the large diameter portion 92L of the wall member 90, and has a gap with the radial inner surface of the large diameter portion 92L.

[0086] Therefore, according to this piping structure 10, the sealing material 32 adheres closely to the other axial side surface of the flange portion 22 and the step surface between the small diameter portion 92S and the large diameter portion 92L of the wall member 90, but does not come into contact with the radial inner surface of the large diameter portion 92L.Therefore, when fastening the sleeve pipe 12 to the wall member 90, the sealing material 32 is prevented from being caught between the radial inner surface of the large diameter portion 92L of the wall member 90 and the radial outer surface of the flange portion 22, which would increase the fastening load when fastening the sleeve pipe 12.

[0087] In addition, one side piping 66 and the other side piping 68 are connected to a joint 60 formed by penetrating a plate 50 covering one axial end of the sleeve pipe 12 and supported by the plate 50, and the one side piping 66 and the other side piping 68 are supported in communication within the main body of the sleeve pipe 12, making it possible to easily install the piping structure 10.

[0088] Furthermore, the plate 50 is removably fixed to the other axial side of the sleeve pipe 12, and the one-side piping 66 has an excess length that can be pulled out to the other side of the sleeve pipe 12. Therefore, by removing the plate 50 from the sleeve pipe 12 and pulling it to the other axial side, the one-side piping 66 is pulled out, and the connection point between the joint 60 and the one-side piping 66 can be visually inspected.

[0089] (Variation) FIG. 5 is a diagram showing a modified example of the piping structure 10 according to the present disclosure. This modified example differs from the above-described embodiment in that the sleeve pipe main body 20 does not have the nonwoven fabric 30, and a protrusion 26 is formed in the location of the cylindrical portion 24 where the nonwoven fabric 30 was provided.

[0090] As shown in FIG. 5, the protrusion 26 is a portion on the other axial side of the recess 28 where a protrusion is formed radially outward from the cylindrical portion 24, and its radial size and axial length are the same as those of the nonwoven fabric 30 according to the embodiment described above.

[0091] The protrusion 26 may be formed around the entire circumference of the cylindrical portion 24 in the circumferential direction, or a plurality of protrusions may be formed at intervals so as to be aligned in the circumferential direction.

[0092] The other configurations are the same as those of the above-described embodiment.

[0093] The piping structure 10 according to this modified example can also achieve the effects obtained in the above-described embodiment.

[0094] In the above description, in the piping structure 10 according to the present disclosure, the protruding portion 36 of the sealing material 32 is annular as an example, but is not limited to this as long as it prevents the sealing material 32 from falling to the other side in the axial direction. For example, the protruding portion 36 may be a plurality of protruding portions arranged in a line at intervals in the circumferential direction.

[0095] As shown in FIG. 1, in the piping structure 10 according to the present disclosure, among the one-side piping 66, the first one-side piping 66A is connected to the first one-side piping connection portion 62A, and the first Other side piping 68A is connected to the first other-side pipe connection portion 64A, the second one-side pipe 66B is connected to the second one-side pipe connection portion 62B, and the second other-side pipe 68B is connected to the second The other pipe connection part 64B However, any fluid may flow through each pipe in either one axial direction or the other axial direction.

[0096] That is, the fluids flowing through the first one-side piping 66A and the first other-side piping 68A and the second one-side piping 66B and the second other-side piping 68B may be the same or different fluids, and may be flowing in the same or different directions.

[0097] In Figures 1 and 2, two one-side pipe connection portions 62 and two other-side pipe connection portions 64 are provided, and two one-side pipes 66 and two other-side pipes 68 are connected, but this is not limited to this, and the numbers of one-side pipe connection portions 62 and two other-side pipe connection portions 64 and the numbers of one-side pipes 66 and two other-side pipes 68 may be set appropriately according to the usage pattern.

[0098] The above describes an embodiment of the present disclosure with reference to the accompanying drawings. However, it is clear that a person with ordinary knowledge in the field of technology to which the present disclosure pertains can conceive of various modifications or applications within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure. [Explanation of symbols]

[0099] 10 Piping structure, 12 Sleeve pipe, 20 Sleeve pipe body, 22 Flange portion, 24 Cylindrical portion, 26 Protrusion portion, 28 Recessed portion, 30 Nonwoven fabric (an example of a restricting member), 32 Sealing material, 34 Annular portion, 36 Protrusion portion, 38 Sleeve pipe fastener, 40 Insertion portion, 42 Fastening nut (an example of a mounting part), 44 Plate mounting portion, 46 Groove, 50 Plate, 52 Plate fastener, 54 O-ring, 60 Joint, 62 One side pipe connection portion, 64 Other side pipe connection portion, 66 One side pipe, 68 Other side pipe, 90 Wall member, 92 Through hole

Claims

1. a cylindrical sleeve pipe body having a flange portion on one axial side; a sealing material disposed on the other side in the axial direction with respect to the flange portion, the sealing material having an annular portion formed in an annular shape along a surface of the flange portion on the other side in the axial direction, and a protruding portion protruding from a radially inner end of the annular portion to the other side in the axial direction; a restricting member that is disposed on the outer peripheral surface of the sleeve pipe main body on the other side in the axial direction relative to the sealing material and restricts movement of the sealing material toward the other side in the axial direction; A sleeve pipe comprising:

2. the sleeve pipe body has a recess on its outer circumferential surface on the other side in the axial direction relative to the flange portion, The sealing material covers the recess from the outside in the radial direction. The sleeve pipe according to claim 1 .

3. The sleeve pipe according to claim 1 or 2; a plate that is detachably attached to one side of the flange portion in the axial direction and fixed to cover the flange portion; a plate joint formed to penetrate the plate and supported by the plate, the plate joint having a one-side pipe connection portion on one side in the axial direction to which one-side piping can be connected, and a other-side pipe connection portion on the other side in the axial direction of the plate to which the other-side piping can be connected; one-side piping connected to the one-side pipe connection portion; a second pipe connected to the second pipe connecting portion, the second pipe having an excess length that can be pulled out toward one side in the axial direction of the sleeve pipe body; Equipped with When the sleeve tube is inserted into a through hole having a small diameter portion and a large diameter portion formed in a wall member and fastened to the wall member, the sealing material has an outer diameter smaller than the outer diameter of the flange portion, and is in close contact with the other side surface of the flange portion in the axial direction and a step surface between the small diameter portion and the large diameter portion of the wall member. Piping structure.

Images