JP2017005802A - Duct sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct sleeve that is satisfactory in workability and obtains ensured water-proof effect.SOLUTION: A duct sleeve 1 fixed to a through-hole 2b in a wall 2 and in which an insertion pipe 3 is inserted comprises: a first pipe 11 whose one-end inside diameter is larger than the other-end inside diameter and whose one-end outside diameter is larger than the other-end outside diameter; a second pipe 12 inserted between the one-end inner periphery 11ab of the first pipe 11 and the outer periphery of the insertion pipe 3; a third pipe 13 inserted between the other-end outer periphery 11ca of the first pipe 11 and the inner periphery of the through-hole 2b; a first elastic body 14 inserted between the one-end inner periphery 11ab of the first pipe 11, the outer periphery of the insertion pipe 3, and the second pipe 12; and a second elastic body 15 inserted between the other-end outer periphery 11ca of the first pipe 11, the inner periphery of the through-hole 2b, and the third pipe 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a duct sleeve.

  There is a known structure and method for filling a through hole opened in a wall such as a hand hole and an insertion tube or cable with a putty in a joint structure where a cable is branched from a hand hole buried in the ground. (For example, Patent Document 1 and Non-Patent Document 1). Also, attach a cylinder with a flange (pipe connector, connector, duct, bell mouth, etc.) to a through hole opened in the wall of a hand hole, etc., and insert a packing between the cylinder and the through hole. Structures and methods for stopping water are known (for example, Patent Documents 2 to 5).

JP 2006-320155 A JP 2014-052022 A Japanese Patent Laid-Open No. 11-266519 JP-A-9-322348 JP 2000-257755 A

“Future Industry Electrical Materials Catalog 2015-2016” http://www.mirai.co.jp/densetu/pdf/2015_01.pdf, Mirai Kogyo Co., Ltd., 2015, p. 310-311

However, in the putty application in the structure and method in which the through hole opened in the wall of the hand hole or the like and the insertion tube or cable are filled with the putty, the putty is applied to the side wall of the hand hole or the like, but this side wall is dirty. , Cleaning takes time. In addition, an epoxy resin adhesive is generally used for the putty, but it takes several hours until it is completely cured. In addition, the putty application work has a problem in that the putty application by the installer varies and the waterproofness is not uniform.
In addition, in the structure and method in which the packing is sandwiched between the through-hole opened in the wall of a hand hole or the like and the cylinder to stop the water, the packing is likely to be deteriorated by rain water or the like, and a reliable waterproof effect cannot be obtained. There is.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a duct sleeve that has good workability in a short time and can provide a waterproof effect.

A duct sleeve according to an aspect of the present invention is a duct sleeve that is fixed to a through-hole opened in a wall and into which an insertion tube is inserted,
A first pipe having an inner diameter on one end larger than an inner diameter on the other end and an outer diameter on one end larger than the outer diameter on the other end;
A second tube inserted between an inner peripheral surface at one end of the first tube and an outer peripheral surface of the insertion tube;
A third tube inserted between the outer peripheral surface of the other end of the first tube and the inner surface of the through hole;
A first elastic body inserted between an inner peripheral surface at one end of the first tube, an outer peripheral surface of the insertion tube, and the second tube;
A second elastic body inserted between the outer peripheral surface on the other end side of the first tube, the inner surface of the through hole, and the third tube.

  According to the present invention, it is possible to provide a duct sleeve that has good workability in a short time and can provide a waterproof effect.

It is a section perspective view of the penetration tube penetration direction showing the section of the state where the duct sleeve concerning this embodiment was fixed to the wall, and the penetration tube was penetrated. It is a disassembled perspective view of the duct sleeve which concerns on this embodiment.

[Description of Embodiment of the Present Invention]
First, embodiments of the present invention will be listed and described.
The duct sleeve according to the embodiment of the present invention,
(1) A duct sleeve fixed to a through-hole opened in a wall and into which an insertion tube is inserted,
A first pipe having an inner diameter on one end larger than an inner diameter on the other end and an outer diameter on one end larger than the outer diameter on the other end;
A second tube inserted between an inner peripheral surface at one end of the first tube and an outer peripheral surface of the insertion tube;
A third tube inserted between the outer peripheral surface of the other end of the first tube and the inner surface of the through hole;
A first elastic body inserted between an inner peripheral surface at one end of the first tube, an outer peripheral surface of the insertion tube, and the second tube;
A second elastic body inserted between the outer peripheral surface on the other end side of the first tube, the inner surface of the through hole, and the third tube.

With the above configuration, when the second tube is inserted between the inner peripheral surface on one end side of the first tube and the outer peripheral surface of the insertion tube, the first elastic body is in a direction along the central axis of the through hole. Is compressed. As a result, the first elastic body expands in the radial direction of the through hole, contacts the outer peripheral surface of the insertion tube in the circumferential direction, and contacts the inner peripheral surface of one end side of the first tube in the circumferential direction. The space between the outer peripheral surface of the tube and the inner peripheral surface on one end side of the first tube is sealed.
Further, when the third tube is inserted between the outer peripheral surface on the other end side of the first tube and the inner surface of the through hole, the second elastic body is compressed in a direction along the central axis of the through hole. The As a result, the second elastic body expands in the radial direction of the through hole, contacts the outer peripheral surface of the other end side of the first tube in the circumferential direction, and contacts the inner surface of the through hole in the circumferential direction. The gap between the outer peripheral surface of the other end of the tube and the inner surface of the through hole is sealed.
As described above, the gap generated between the duct sleeve and the through-hole and between the duct sleeve and the insertion tube by sealing the outer peripheral side (through-hole side) and the inner peripheral side (insertion-tube side) separately. Can be sealed more easily, and a waterproof effect can be obtained.

(2) In the duct sleeve of (1), a thread is provided on the outer peripheral surface on the other end side of the first tube, and a thread is provided on the inner peripheral surface on the other end side of the third tube, The first tube and the third tube are screwed together, and the second elastic body is compressed in a direction along the central axis of the through-hole when screwed.
When the third tube is inserted between the outer peripheral surface on the other end side of the first tube and the inner surface of the through hole by screw tightening, the second elastic body moves in a direction along the central axis of the through hole. Compressed. As a result, the second elastic body expands in the radial direction of the through hole, contacts the outer peripheral surface of the other end side of the first tube in the circumferential direction, and contacts the inner surface of the through hole in the circumferential direction. It is possible to satisfactorily seal between the outer peripheral surface of the other end of the tube and the inner surface of the through hole.

  (3) In the duct sleeve of (1) or (2), the outer dimension on the one end side of the first pipe is larger than the inner diameter of the through hole. Thereby, the periphery of the through hole in the wall surface portion can be closed with the first tube.

(4) In the duct sleeve according to any one of (1) to (3), a screw thread is provided on the inner peripheral surface on one end side of the first tube, and a screw thread is formed on the outer peripheral surface of the second tube. Provided, the first tube and the second tube are screwed together, and the first elastic body is compressed in a direction along the central axis of the through hole when screwed.
When the second tube is inserted between the inner peripheral surface on one end side of the first tube and the outer peripheral surface of the insertion tube by screwing, the first elastic body is in a direction along the central axis of the through hole. Is compressed. As a result, the first elastic body expands in the radial direction of the through hole, contacts the outer peripheral surface of the insertion tube in the circumferential direction, and contacts the inner peripheral surface of one end side of the first tube in the circumferential direction. It is possible to satisfactorily seal between the outer peripheral surface of the tube and the inner peripheral surface on one end side of the first tube.

  (5) In the duct sleeve according to any one of (1) to (4), the outer dimension on the one end side of the third pipe is larger than the inner diameter of the through hole. Thereby, the periphery of the through hole in the wall surface portion can be closed with the third tube.

(6) In the duct sleeve according to any one of (1) to (5), a second washer is provided between the other end side of the third tube and the second elastic body.
When the third tube is inserted into the first tube, the second washer can be slid and fixed with respect to the third tube. Therefore, it is possible to prevent a force other than compression from being applied to the second elastic body adjacent to the second washer as much as possible.

(7) In the duct sleeve according to any one of (1) to (6), a first washer is provided between the second tube and the first elastic body.
When the second tube is inserted into the first tube, the first washer can be slid and fixed relative to the second tube. Therefore, it is possible to prevent a force other than compression from being applied to the first elastic body adjacent to the first washer as much as possible.

(8) In the duct sleeve according to any one of (1) to (7), the first elastic body and the second elastic body are elastic bodies having a hardness of 1 to 15 according to a Shore A measurement method. .
Since the first elastic body and the second elastic body are soft elastic bodies having a hardness of 1 to 15 according to the Shore A measurement method, the inner shape of the through hole, the irregular shape of the outer shape of the insertion tube, and different inner shapes, It is easier to follow the outer shape and can be sealed more reliably.

[Details of the embodiment of the present invention]
Specific examples of the duct sleeve according to the embodiment of the present invention will be described below with reference to the drawings.
In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

  FIG. 1 is a cross-sectional perspective view in the insertion tube insertion direction showing a cross section in a state where the duct sleeve 1 according to the present embodiment is fixed to the wall 2 and the insertion tube 3 is inserted. FIG. 2 is an exploded perspective view of the duct sleeve 1 according to the present embodiment.

As shown in FIG. 1, a duct sleeve 1 is a cylinder for inserting and fixing an insertion tube 3 into a through-hole 2b opened in a wall 2 such as a concrete handhole embedded in the ground. Shaped member. The insertion tube 3 is, for example, a PF tube having a bellows structure, and can pass cables such as a communication cable.
As shown in FIG. 2, the duct sleeve 1 includes at least a first tube 11, a second tube 12, a third tube 13, a first elastic body 14, and a second elastic body 15. Further, a first washer 16 and a second washer 17 may be provided.

  As shown in FIG. 2, the 1st pipe | tube 11 has the flange part 11b which has an outer dimension larger than the inner diameter of the through-hole 2b in the one end side 11a. As shown in FIG. 1, the flange portion 11 b contacts the periphery of the opening of the through hole 2 b of one wall surface 2 a of the wall 2, thereby closing the gap around the opening of the through hole 2 b and the duct sleeve 1 to the wall 2. Make it easy to fix. The one end side 11a of the first tube 11 does not necessarily have a flange shape, and if it has an outer dimension larger than the inner diameter of the through hole 2b, that portion is not inserted into the through hole 2b, A gap around the opening of the through hole 2b can be closed.

  Moreover, as shown in FIG. 1, the one end side inner diameter r1 of the 1st pipe | tube 11 is larger than the other end side inner diameter r2, and the one end side outer diameter r3 is larger than the other end side outer diameter r4. In the example shown in FIGS. 1 and 2, there is a step 11d between the one end side 11a and the other end side 11c. In addition, a screw thread is provided on the end portion side 11e of the one end side inner peripheral surface 11ab, and a screw thread is also provided on the end portion side 11f of the other end side outer peripheral surface 11ca.

The second tube 12 has a flange portion 12 b on one end side 12 a, and the other end 12 c is inserted between the one end side inner peripheral surface 11 ab of the first tube 11 and the outer peripheral surface of the insertion tube 3. It is. The flange portion 12b may not be provided.
The other end side outer peripheral surface 12ca is provided with a thread, and the end side 11e of the first end inner peripheral surface 11ab of the first tube 11 and the other end side outer peripheral surface 12ca of the second tube 12 are These are screwed together. The connection between the first tube 11 and the second tube 12 is not limited to the screw connection, but a form in which the first tube 11 and the second tube 12 are engaged with each other so as to be engaged with each other, and a screw penetrating both. It may be fixed in the form.

The third tube 13 has a flange portion 13b on one end side 13a, and the other end side 13c is a member inserted between the other end side outer peripheral surface 11ca of the first tube 11 and the inner surface of the through hole 2b. is there.
Further, the inner peripheral surface 13 d of the third tube 13 is provided with a thread, and the end portion side 11 f of the other end side outer peripheral surface 11 ca of the first tube 11 and the inner peripheral surface 13 d of the third tube 13. Are screwed together. Note that the connection between the first tube 11 and the third tube 13 is not limited to the screw connection, and a form in which the first tube 11 and the third tube 13 are engaged with each other by forming irregularities that can be engaged with each other, and a screw that penetrates both. It may be fixed in the form.
As shown in FIG. 1, the flange portion 13 b does not necessarily contact the other wall surface 2 c of the wall 2, but, for example, is further screwed to the first tube 11 to form a through hole in the other wall surface 2 c. You may make it contact | connect the opening periphery of 2b. Note that the one end side 13a of the third tube 13 does not necessarily have a flange shape, and if there is a portion having an outer dimension larger than the inner diameter of the through hole 2b, that portion is not inserted into the through hole 2b. The gap around the opening of the through hole 2b can be closed.

  The first elastic body 14 is a member provided to be sandwiched between the one end side inner peripheral surface 11ab of the first tube 11 and the outer peripheral surface of the insertion tube 3. When the second tube 12 is inserted between the one end inner peripheral surface 11ab of the first tube 11 and the outer peripheral surface of the insertion tube 3, the first elastic body 14 is the central axis of the through hole 2b. Compressed in the direction along In the example shown in FIG. 1, since the first tube 11 and the second tube 12 are screwed together, the first elastic body 14 is compressed in the direction along the central axis of the through hole 2b when screwed. Is done.

Thereby, the first elastic body 14 expands in the radial direction of the through-hole 2b (the front-rear direction of the arrow B in FIG. 1), contacts the outer peripheral surface of the insertion tube 3 in the circumferential direction, and the first tube 11 The one end side inner circumferential surface 11ab is in contact with the circumferential direction. Thereby, the 1st elastic body 14 seals between the outer peripheral surface of the insertion tube 3, and the one end side inner peripheral surface 11ab of the 1st pipe | tube 11. As shown in FIG.
In the example shown in FIG. 1, the first elastic body 14 is provided inside the step 11 d of the first tube 11. Thereby, when the 2nd pipe | tube 12 is inserted, since the 1st elastic body 14 is pressed against the vertical surface inside the level | step difference 11d, the said compression can be performed efficiently.

  The 2nd elastic body 15 is a member provided so that it might be pinched | interposed between the other end side outer peripheral surface 11ca of the 1st pipe | tube 11, and the inner surface of the through-hole 2b. The second elastic body 15 penetrates the second elastic body 15 when the third pipe 13 is inserted between the other end side outer peripheral surface 11ca of the first pipe 11 and the inner surface of the through hole 2b. It is compressed in the direction along the central axis of the hole 2b. In the example shown in FIG. 1, since the first tube 11 and the third tube 13 are screwed together, the second elastic body 15 is compressed in the direction along the central axis of the through hole 2b when screwed. Is done.

Thereby, the second elastic body 15 expands in the radial direction of the through-hole 2b (the front-rear direction of the arrow C in FIG. 1), contacts the other end side outer peripheral surface 11ca of the first tube 11 in the circumferential direction, and It contacts the inner surface of the through-hole 2b over the circumferential direction. Thereby, the 2nd elastic body 15 seals between the other end side outer peripheral surface 11ca of the 1st pipe | tube 11, and the inner surface of the through-hole 2b.
In the example shown in FIG. 1, the second elastic body 15 is provided outside the step 11 d of the first tube 11. Thereby, when the 3rd pipe | tube 13 is inserted, since the 2nd elastic body 15 is pressed on the vertical surface outside the level | step difference 11d, the said compression can be performed efficiently.

The insertion tube 3 shown in FIG. 1 is a tube having irregularities on its outer peripheral surface, such as a bellows structure tube (for example, a PF tube). Further, the insertion tube 3 may use a tube having a different external shape from that shown in the figure. For this reason, if the 1st elastic body 14 and the 2nd elastic body 15 are elastic bodies, such as soft low-hardness rubber | gum, it can follow and seal the unevenness | corrugation of the external shape of the penetration tube 3. FIG. Further, it is possible to follow and seal a pipe having a different external shape from the insertion pipe 3 shown in FIG. For this reason, the 1st elastic body 14 and the 2nd elastic body 15 are good to be an elastic body with the hardness of 1-15 by the Shore A measuring method. More preferably, the hardness is 1 to 10. More preferably, the hardness is 2 to 5.
“Shore A” is a standard for measuring the hardness of general rubber, and is a standard measured with a type A durometer (spring type rubber hardness meter) of JIS K6253.

  The first washer 16 is a member such as a washer that is sandwiched between the other end 12 c of the second tube 12 and the first elastic body 14. The inner peripheral surface of the first washer 16 is in contact with the outer peripheral surface of the insertion tube 3. The outer peripheral surface of the first washer 16 is in contact with the end portion side 11e of the one end side inner peripheral surface 11ab of the first tube 11.

  The second washer 17 is a member such as a washer that is sandwiched between the other end 13 c of the third tube 13 and the second elastic body 15. The outer peripheral surface of the second washer 17 is in contact with the inner surface of the through hole 2b. Further, the inner peripheral surface of the second washer 17 is in contact with the end portion side 11 f of the other end side outer peripheral surface 11 ca of the first tube 11.

  As described above in detail, according to the duct sleeve 1 of the present embodiment, the second tube 12 is inserted between the one end side inner peripheral surface 11ab of the first tube 11 and the outer peripheral surface of the insertion tube 3. In this case, the first elastic body 14 is compressed in a direction along the central axis of the through hole 2b. Accordingly, the first elastic body 14 expands in the radial direction of the through hole 2b, contacts the outer peripheral surface of the insertion tube 3 in the circumferential direction, and extends to the inner peripheral surface 11ab of the first tube 11 in the circumferential direction. By contacting, the space between the outer peripheral surface of the insertion tube 3 and the inner peripheral surface 11ab on the one end side of the first tube 11 is sealed.

  Further, according to the duct sleeve 1 of the present embodiment, when the third tube 13 is inserted between the other end side outer peripheral surface 11ca of the first tube 11 and the inner surface of the through hole 2b, the second tube 13 is inserted. The elastic body 15 is compressed in a direction along the central axis of the through hole 2b. As a result, the second elastic body 15 expands in the radial direction of the through hole 2b, contacts the other end side outer peripheral surface 11ca of the first tube 11 in the circumferential direction, and contacts the inner surface of the through hole 2b in the circumferential direction. Thus, the gap between the other end side outer peripheral surface 11ca of the first tube 11 and the inner surface of the through hole 2b is sealed.

That is, the duct sleeve 1 according to the present embodiment seals the outer circumference side (through hole 2b side) and the inner circumference side (insertion tube 3 side) separately, and between the duct sleeve 1 and the through hole 2b and the duct. A gap generated between the sleeve 1 and the insertion tube can be more easily sealed, and a waterproof effect can be obtained.
In order to obtain a stronger waterproof effect, a putty may be applied as an auxiliary.

  Further, the duct sleeve 1 is provided with a thread on the inner peripheral surface on one end side of the first tube 11 and a thread on the outer peripheral surface of the second tube 12. The tube 12 may be configured to be screwed together. Thereby, when the 2nd pipe | tube 12 is inserted between the one end side internal peripheral surface 11ab of the 1st pipe | tube 11, and the outer peripheral surface of the insertion pipe 3 by screwing, the 1st elastic body 14 is Compressed in a direction along the central axis of the through hole 2b. Accordingly, the first elastic body 14 expands in the radial direction of the through hole 2b, contacts the outer peripheral surface of the insertion tube 3 in the circumferential direction, and extends to the inner peripheral surface 11ab of the first tube 11 in the circumferential direction. By contacting, the space between the outer peripheral surface of the insertion tube 3 and the inner peripheral surface 11ab on the one end side of the first tube 11 can be satisfactorily sealed.

  Further, the duct sleeve 1 may include a first washer 16 between the other end side 12 c of the second tube 12 and the first elastic body 14. Thereby, when inserting the 2nd pipe | tube 12 in the 1st pipe | tube 11 by screwing, the 1st washer 16 slips with respect to the 2nd pipe | tube 12 and screw-tightens so that the 1st washer 16 may not be rotated. it can. Therefore, the first elastic body 14 adjacent to the first washer 16 can be prevented from rotating, and deformation due to the rotation of the first elastic body 14 can be prevented.

  The duct sleeve 1 may be configured such that the end portion side 11f of the outer peripheral surface 11ca on the other end side of the first tube 11 and the inner peripheral surface 13d of the third tube 13 are screw-coupled to each other. Thereby, when the 3rd pipe | tube 13 is inserted between the other end side outer peripheral surface 11ca of the 1st pipe | tube 11, and the inner surface of the through-hole 2b by screwing, the 2nd elastic body 15 penetrates. It is compressed in the direction along the central axis of the hole 2b. As a result, the second elastic body 15 expands in the radial direction of the through hole 2b, contacts the other end side outer peripheral surface 11ca of the first tube 11 in the circumferential direction, and contacts the inner surface of the through hole 2b in the circumferential direction. Thus, the gap between the outer peripheral surface 11ca on the other end side of the first tube 11 and the inner surface of the through hole 2b can be satisfactorily sealed. In addition, the connection between the first tube 11 and the third tube 13 is not limited to the screw connection, but is formed in a form in which the first tube 11 and the third tube 13 are respectively formed with projections and recesses, and fixed with screws that penetrate both. Form may be sufficient.

  Furthermore, the duct sleeve 1 may include a second washer 17 between the other end side 13 c of the third tube 13 and the second elastic body 15. Thereby, when inserting the 3rd pipe | tube 13 in the 1st pipe | tube 11 by screwing, the 2nd washer 17 slips with respect to the 3rd pipe | tube 13, and screw-tightens so that the 2nd washer 17 may not be rotated. it can. Therefore, the second elastic body 15 adjacent to the second washer 17 can be prevented from rotating, and deformation due to the rotation of the second elastic body 15 can be prevented.

DESCRIPTION OF SYMBOLS 1 Duct sleeve 2 Wall 2a, 2c Wall surface 2b Through-hole 3 Insertion pipe 11 1st pipe | tube 11a One end side 11ab One end side inner peripheral surface 11b Flange part 11c Other end side 11ca Other end side outer peripheral surface 11d Level difference 11e End part side 11f End Part side 12 Second pipe 12a One end side 12b Flange part 12c Other end side 12ca Other end side outer peripheral face 13 Third pipe 13a One end side 13b Flange part 13c Other end side 13d Inner peripheral face 14 First elastic body 15 Second Elastic body 16 First washer 17 Second washer r1 One end side inner diameter r2 Other end side inner diameter r3 One end side outer diameter r4 Other end side outer diameter

Claims (8)

It is a duct sleeve that is fixed to a through hole opened in a wall and into which an insertion tube is inserted,
A first pipe having an inner diameter on one end larger than an inner diameter on the other end and an outer diameter on one end larger than the outer diameter on the other end;
A second tube inserted between an inner peripheral surface at one end of the first tube and an outer peripheral surface of the insertion tube;
A third tube inserted between the outer peripheral surface of the other end of the first tube and the inner surface of the through hole;
A first elastic body inserted between an inner peripheral surface at one end of the first tube, an outer peripheral surface of the insertion tube, and the second tube;
A second elastic body inserted between the outer peripheral surface of the other end side of the first tube, the inner surface of the through hole, and the third tube;
Duct sleeve.   A thread is provided on the outer peripheral surface of the other end side of the first tube, and a thread is provided on the inner peripheral surface of the other end side of the third tube, and the first tube and the third tube 2. The duct sleeve according to claim 1, wherein the second elastic body is compressed in a direction along a central axis of the through hole when the two are screwed together and tightened.   The duct sleeve according to claim 1 or 2, wherein an outer dimension on one end side of the first pipe is larger than an inner diameter of the through hole.   A screw thread is provided on the inner peripheral surface of the one end side of the first tube, and a screw thread is provided on the outer peripheral surface of the second tube, and the first tube and the second tube are screwed together. The duct sleeve according to any one of claims 1 to 3, wherein the first elastic body is compressed in a direction along a central axis of the through hole when being screwed.   The duct sleeve according to any one of claims 1 to 4, wherein an outer dimension on one end side of the third pipe is larger than an inner diameter of the through hole.   The duct sleeve according to any one of claims 1 to 5, further comprising a second washer between the other end of the third tube and the second elastic body.   The duct sleeve as described in any one of Claims 1-6 provided with a 1st washer between said 2nd pipe | tube and said 1st elastic body.   The duct sleeve according to any one of claims 1 to 7, wherein the first elastic body and the second elastic body are elastic bodies having a hardness of 1 to 15 according to a Shore A measurement method.

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