JP2018040484A - Water proof cap for pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water proof cap for pipeline capable of reducing the type of protective pipe to be prepared and the type of body cap to be prepared even if the diameter of a flexible tube changes.SOLUTION: A water proof cap for pipeline comprises a body cap KH, in which a cylindrical small diameter side outer fitting part KA fitted over a flexible tube 3; a cylindrical large diameter side outer fitting part KB fitted over a protective pipe 4 covering the flexible tube 3; and a connection cylinder part KC formed in a state where the smaller its diameter is made, the closer to the small diameter side outer fitting part KA from the large diameter side outer fitting part KB, for connecting the large diameter side outer fitting part KB to the small diameter side outer fitting part KA are molded integrally in a state where they are arranged in the longitudinal direction of the flexible tube 3 with synthetic resin to form the body cap KH. A cylindrical auxiliary outer fitting part KG having smaller diameter than the small diameter side outer fitting part KA and fitted over the flexible tube 3; and an auxiliary cylinder part KS having a flange part KT extending radially outward from one end part of the auxiliary outer fitting part KG are attached to the body cap KH in a state in which the auxiliary outer fitting part KG is positioned inside the small diameter side outer fitting part KA and the flange part KT is brought into contact with the connection cylinder part KC.SELECTED DRAWING: Figure 3

Description

  The present invention includes a cylindrical small-diameter side external fitting portion that is externally fitted to a flexible pipe, a cylindrical large-diameter side external fitting portion that is externally fitted to a protective tube that covers the flexible pipe, and the large-diameter side external fitting portion. A connecting cylinder portion that is formed so as to have a smaller diameter as it approaches the small-diameter side outer fitting portion and connects the large-diameter side outer fitting portion and the small-diameter side outer fitting portion is aligned in the longitudinal direction of the flexible tube. The present invention relates to a waterproof cap for piping provided with a main body cap that is integrally molded with a synthetic resin.

  Air-conditioning pipes that flow the air-conditioning heat medium, gas inflow pipes that flow gas into the gas meter, and gas discharge pipes that discharge gas from the gas meter to flexible pipes (flexible pipes) covered with a protective pipe In this case, in this case, a cylindrical small-diameter side external fitting portion that is externally fitted to the flexible tube, a cylindrical large-diameter side external fitting portion that is externally fitted to the protective tube, and a large-diameter side external fitting portion A main body cap in which a connecting tube portion that connects the portion and the small-diameter side outer fitting portion is integrally formed is mounted across the flexible tube and the protective tube (see, for example, Patent Document 1).

Patent Document 1 describes a case where a gas inflow pipe for injecting gas into a gas meter and a gas exhaust pipe for discharging gas from the gas meter to the outside are configured by a flexible pipe (flexible pipe) covered with a protective pipe. ing.
In Patent Document 1, detailed description of the main body cap of the waterproof cap for piping is omitted, but the large-diameter side external fitting portion is externally fitted to the end portion of the protective tube, and the small-diameter side external fitting is performed. By attaching the body cap in a state where the part is externally fitted to the flexible tube protruding from the end of the protective tube, foreign matter such as water passes through the space between the outer surface of the flexible tube and the inner surface of the protective tube. Prevent intrusion.

Japanese Patent Laid-Open No. 11-287663

  As the flexible pipe, pipes having various diameters are used according to the flow rate of the fluid to be flowed. In this case, if protective pipes with various diameters are used in accordance with the diameter of the flexible pipe, the main body cap constituting the waterproof cap for piping also has different diameters on the small-diameter side outer fitting part and the large-diameter side outer fitting part. There is a disadvantage that it is necessary to prepare various things, and it is necessary to prepare protective pipes with various diameters and body caps with various diameters constituting a waterproof cap for pipes as piping members.

  The present invention has been made in view of the above circumstances, and can provide a piping waterproof cap that can reduce the types of protective tubes to be prepared and the types of body caps to be prepared even if the diameter of the flexible tube changes. Is to provide

The present invention includes a cylindrical small-diameter side external fitting portion that is externally fitted to a flexible pipe, a cylindrical large-diameter side external fitting portion that is externally fitted to a protective tube that covers the flexible pipe, and the large-diameter side external fitting portion. A connecting cylinder portion that is formed so as to have a smaller diameter as it approaches the small-diameter side outer fitting portion and connects the large-diameter side outer fitting portion and the small-diameter side outer fitting portion is aligned in the longitudinal direction of the flexible tube. It is a waterproof cap for piping provided with a body cap that is integrally molded with synthetic resin in the state, and its characteristic configuration is
An auxiliary cylinder portion having a cylindrical auxiliary outer fitting portion that is smaller in diameter than the outer fitting portion on the small diameter side and that is fitted on the flexible pipe, and a flange portion that extends radially outward from one end portion of the auxiliary outer fitting portion. The auxiliary outer fitting portion is positioned inside the small-diameter side outer fitting portion, and the collar portion is attached to the connecting cylinder portion, and is attached to the main body cap.

  That is, when the small diameter side external fitting part of the main body cap corresponds to the flexible pipe to be used, the small diameter side external fitting part is used as it is, and the small diameter side external fitting part of the main body cap is used as the flexible pipe to be used. If the diameter of the tube is too large, the auxiliary cylinder portion including the auxiliary outer fitting portion corresponding to the flexible tube to be used is positioned inside the small-diameter side outer fitting portion with the auxiliary outer fitting portion. Is attached to the main body cap in a state of being applied to the connecting cylinder part, and the auxiliary external fitting part of the auxiliary cylinder part is externally fitted to the flexible pipe to be used.

  And in the state which attached the auxiliary cylinder part to the main body cap, since the collar part of the auxiliary cylinder part is applied to the connecting cylinder part of the main body cap, the small diameter side outer fitting part of the main body cap and the auxiliary cylinder part It is possible to prevent foreign matters such as water from entering the inside of the protective tube through the auxiliary outer fitting portion.

  Accordingly, the outer diameter fitting portion of the main body cap is fitted to one type (diameter) of the protective pipe, and the outer diameter fitting portion of the main body cap and the auxiliary fitting are adapted according to the diameter of the flexible pipe to be used. By selecting the auxiliary external fitting part of the cylindrical part, it becomes possible to make it fit externally to multiple types of flexible pipes with different diameters. As a result, even if the diameter of the flexible pipe changes, The number of types can be reduced, and the number of main body caps to be prepared can be reduced.

  That is, using the point that the auxiliary cylinder portion including the auxiliary outer fitting portion and the collar portion can be easily manufactured as compared with the main body cap including the large diameter side outer fitting portion, the small diameter side outer fitting portion, and the connecting cylinder portion, By attaching the auxiliary cylinder part to the main body cap according to the diameter of the flexible tube to be used, while preparing one type of the main body cap, It is possible to appropriately prevent foreign matters such as the like from entering the protective tube.

  In short, according to the characteristic configuration of the waterproof cap for piping of the present invention, the types of protective tubes to be prepared and the types of body caps to be prepared can be reduced even if the diameter of the flexible tube changes.

A further characteristic configuration of the waterproof cap for piping according to the present invention is formed in a truncated cone shape in which the connecting cylinder portion has a smaller diameter as it approaches the outer fitting portion on the smaller diameter side,
The said collar part exists in the point formed in the truncated cone shape which becomes a small diameter, so that the said auxiliary | assistant external fitting part is approached.

  That is, the connecting tube portion that connects the large-diameter side outer fitting portion and the small-diameter side outer fitting portion of the main body cap is formed in a truncated cone shape having a smaller diameter as it approaches the small-diameter side outer fitting portion. When the flexible tube is moved from the large diameter side outer fitting portion toward the small diameter side outer fitting portion when inserted through the large diameter side outer fitting portion and the small diameter side outer fitting portion, a truncated cone shape is obtained. The flexible pipe can be smoothly moved from the large-diameter side outer fitting portion toward the small-diameter side outer fitting portion by the guiding action of the connecting tube portion.

  In addition, since the flange portion of the auxiliary cylinder portion is formed in a truncated cone shape having a smaller diameter as it approaches the auxiliary outer fitting portion, the flexible tube is attached to the auxiliary cylinder portion in a state where the auxiliary cylinder portion is attached to the main body cap. When the flexible tube is moved from the large-diameter side outer fitting portion of the main body cap toward the auxiliary outer fitting portion of the auxiliary cylinder portion when being inserted into the outer fitting portion, the guiding action of the truncated cone-shaped flange portion The flexible tube can be smoothly moved from the outer diameter fitting portion of the main body cap toward the auxiliary fitting portion of the auxiliary cylinder portion.

  In short, according to the further characteristic configuration of the waterproof cap for piping of the present invention, the flexible pipe can be inserted well.

  A further characteristic configuration of the waterproof cap for piping according to the present invention is such that the auxiliary outer fitting portion is configured such that a plurality of cylindrical outer fitting portions having different diameters are closer to the flange portion as the diameter is larger. In the form of being arranged in the longitudinal direction.

  That is, since the auxiliary outer fitting portion includes a plurality of outer fitting portions having different diameters, the diameter of the outer fitting portion having the smallest diameter among the plurality of outer fitting portions corresponds to the flexible pipe to be used. If the outer fitting part is used as it is, the diameter of the outer fitting part closer to the collar part than the outer fitting part with the smallest diameter among the plurality of outer fitting parts is the flexible pipe to be used. When it respond | corresponds, it cut | disconnects the outer fitting part of a small diameter side from the corresponding outer fitting part, and uses the corresponding outer fitting part in an auxiliary | assistant outer fitting part.

Accordingly, by selecting an outer fitting portion to be used from a plurality of outer fitting portions provided in the auxiliary outer fitting portion in the auxiliary cylinder portion, the auxiliary outer fitting portion can be externally fitted to a plurality of types of flexible pipes having different diameters. As a result, even if the diameter of the flexible pipe changes, the types of auxiliary cylinder parts to be prepared can be reduced.
That is, as an auxiliary cylinder part, it is possible to prepare a plurality of types of auxiliary cylinder parts having auxiliary outer fitting parts having different diameters in correspondence with a plurality of types of flexible pipes having different diameters. The type can be reduced.

  In short, according to the further characteristic configuration of the waterproof cap for piping of the present invention, the types of auxiliary cylinder portions to be prepared can be reduced even if the diameter of the flexible pipe changes.

  In the waterproof cap for piping according to the present invention, the flange portion on the surface of the outer fitting portion of the plurality of outer fitting portions, the other outer fitting portion being connected to the end portion on the side away from the flange portion. The cutting line along the circumferential direction is formed at the end portion side away from the center.

  That is, the cutting | disconnection along the circumferential direction in the edge part side location on the side which leaves | separates from the collar part in the surface of the outer fitting part connected with the edge part on the side where the other outer fitting part leaves | separates from a collar part among several external fitting parts Since the line is formed, when other external fitting parts that are no longer needed are cut off, the outer fitting parts are cut along the cutting line, so that the other external fitting parts that are no longer needed can be separated well. Can be done.

  That is, if the cutting line is formed at a position where the length of the cut outer fitting portion is an appropriate length when the outer fitting portion is cut in order to cut off other unnecessary outer fitting portions, When cutting the outer fitting part, the central part in the length direction of the outer fitting part is cut, and the length of the cut outer fitting part is not shortened. Can be cut off satisfactorily.

  In short, according to the further characteristic configuration of the waterproof cap for piping of the present invention, it is possible to satisfactorily disconnect other unnecessary fitting portions.

  A further characteristic configuration of the waterproof cap for piping according to the present invention is a truncated cone-shaped cylindrical portion having a smaller diameter as the adjacent outer fitting portion of the plurality of outer fitting portions approaches the outer fitting portion on the smaller diameter side. It is in a connected point.

  That is, since the adjacent outer fitting portions of the plurality of outer fitting portions are connected by the truncated cone-shaped cylindrical portion having a smaller diameter as approaching the outer fitting portion on the small diameter side, the flexible pipe is connected to the plurality of outer fitting portions. When the flexible tube is moved from the large-diameter side outer fitting portion toward the small-diameter side outer fitting portion when inserted through the portion, the flexible tube is moved by the guiding action of the truncated cone-shaped cylindrical portion. It can be smoothly moved from the outer fitting portion on the large diameter side toward the outer fitting portion on the small diameter side.

  In short, according to the further characteristic configuration of the waterproof cap for piping of the present invention, it is possible to satisfactorily insert the flexible tube into the plurality of external fitting portions of the auxiliary cylinder portion.

Front view of gas meter mounting part Partially cut away side view showing the cap installed Partially cutaway side view showing the mounted state of the main body cap with the first auxiliary cylinder mounted Partially cutaway side view showing the mounted state of the body cap with the second auxiliary cylinder mounted Partially cutaway side view of the waterproof cap for piping of the second embodiment Partially cutaway side view of a waterproof cap for piping of a third embodiment Partial cutaway side view of piping waterproof cap of reference form

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
(Configuration of gas meter mounting part)
As shown in FIG. 1, a flexible gas pipe 3 for gas inflow or gas outflow is connected to the gas inflow pipe part 1 and the gas exhaust pipe part 2 of the gas meter G, and is passed through the flexible gas pipe 3 for gas outflow into the home. Gas is configured to be supplied.

As shown in FIG. 2, in the present embodiment, the flexible tube 3 is composed of a metal bellows-like tube body 3A and a resin-covered tube portion 3B that is externally fitted to the tube body 3A. However, the flexible pipe 3 may be configured in a form in which the covering cylinder portion 3B is omitted.
The flexible tube 3 is covered with a synthetic resin bellows-shaped protective tube (CD tube) 4, and a pipe waterproof cap K is provided at the end of the protective tube 4. Details of the cap K will be described later.

In the present embodiment, the case where the flexible pipe 3 on the gas inflow side is directly connected to the underground gas pipe and the cock 6 is provided in the gas inlet pipe portion 1 of the gas meter G is exemplified. Alternatively, the gas inflow flexible pipe 3 may be connected to a gas introducing branch pipe that is branched from the pipe and exposed to the ground.
In addition, although illustration is abbreviate | omitted, the waterproof cap K for piping is provided corresponding to each of the both ends of the protective tube 4. FIG.

(Details of waterproof cap for piping)
As shown in FIGS. 2 to 4, the piping waterproof cap K includes a main body cap KH, and the main body cap KH has a cylindrical small diameter that is externally fitted to the flexible pipe 3 as shown in FIG. 2. Connection for connecting the side outer fitting portion KA, the cylindrical large-diameter side outer fitting portion KB that is fitted on the protective tube 4 covering the flexible tube 3, and the large-diameter side outer fitting portion KB and the small-diameter side outer fitting portion KA. The cylindrical portion KC is integrally formed of synthetic resin (for example, vinyl chloride resin, thermoplastic elastomer, etc.) in a state in which the flexible tube 3 is aligned in the longitudinal direction.

  Further, as shown in FIGS. 3 and 4, a cylindrical auxiliary outer fitting portion KG that is smaller in diameter than the small outer diameter fitting portion KA and is fitted on the flexible tube 3, and a radial direction from one end portion of the auxiliary outer fitting portion KG. The auxiliary cylinder portion KS including the flange portion KT extending outwardly is positioned in the state where the auxiliary outer fitting portion KG is positioned inside the small diameter side outer fitting portion KA and the flange portion KT is applied to the connection cylinder portion KC. It is attached to the cap KH.

  Further, in the present embodiment, as the auxiliary cylinder part KS, there are a first auxiliary cylinder part S1 (see FIG. 3) and a second auxiliary cylinder part S2 (see FIG. 4) in which the diameters of the auxiliary outer fitting parts KG are different. The first auxiliary cylinder part S1 and the second auxiliary cylinder part S2 are provided so as to be selectively attached to the main body cap KH according to the diameter of the flexible pipe 3.

In the main body cap KH of this embodiment, the inner diameter of the large-diameter side outer fitting portion KB is 42 mm corresponding to the protective tube 4 having a nominal opening diameter of 25A, and the inner diameter of the small-diameter side outer fitting portion KA is 25A. It is 31.5 mm corresponding to the flexible tube 3.
The inner diameter of the auxiliary outer fitting part KG of the first auxiliary cylinder part S1 is 25 mm corresponding to the flexible pipe 3 having a nominal diameter of 20A, and the inner diameter of the auxiliary outer fitting part KG of the second auxiliary cylinder part S2 is The nominal diameter is 19 mm, corresponding to the flexible pipe 3 with 15A.

Therefore, in this embodiment, as shown in FIGS. 2 to 4, the large-diameter side external fitting portion KB of the main body cap KH is externally fitted in close contact with the protective tube (CD tube) 4. As shown in FIG. 2, the small-diameter side external fitting portion KA of the main body cap KH is configured to be externally fitted in close contact with the flexible pipe 3 having a nominal diameter of 25A.
That is, by fitting the small-diameter side outer fitting portion KA in close contact with the flexible tube 3, and by fitting the large-diameter side outer fitting portion KB in close contact with the protective tube (CD tube) 4, The waterproof cap K for piping is configured to be positioned with respect to the flexible tube 3 and the protective tube (CD tube) 4 while preventing intrusion of rainwater or the like.

Further, as shown in FIG. 3, the auxiliary external fitting part KG of the first auxiliary cylinder part S1 is fitted in close contact with the flexible pipe 3 having a nominal diameter of 20A, and similarly, as shown in FIG. The auxiliary external fitting part KG of the second auxiliary cylinder part S2 is configured to be externally fitted in close contact with the flexible pipe 3 having a nominal diameter of 15A.
That is, the large-diameter side outer fitting portion KB of the main body cap KH is fitted in close contact with the protective tube (CD tube) 4, and the auxiliary outer fitting portion KG of the auxiliary cylinder portion KS is in close contact with the flexible tube 3. The flexible pipe 3 and the protection in a state in which the penetration of rainwater and the like is suppressed by external fitting in the state, and the relative movement of the main body cap KH and the auxiliary cylinder part KS in the longitudinal direction of the flexible pipe 3 is prevented. The piping waterproof cap K is positioned with respect to the tube (CD tube) 4.

Further, the connecting cylinder portion KC of the main body cap KH is formed in a truncated cone shape that becomes smaller in diameter as it approaches the small-diameter side outer fitting portion KA, and the diameter decreases as the flange portion KT of the auxiliary cylinder portion KS approaches the auxiliary outer fitting portion KG. It is formed in a truncated cone shape.
The auxiliary cylinder KS is configured to be attached to the main body cap KH in such a manner that the entire outer surface of the collar KT of the auxiliary cylinder KS is applied to the entire inner surface of the connection cylinder KC of the main body cap KH. Has been.

  Therefore, when the flexible tube 3 is inserted into the waterproof cap K for piping, if the flexible tube 3 is moved from the large-diameter side outer fitting portion KB toward the small-diameter side outer fitting portion KA, the connecting tube portion The flexible tube 3 can be inserted satisfactorily by the guiding action of the KC and the buttocks KT.

  That is, for example, as shown in FIG. 7, the connecting cylinder part KC of the main body cap KH and the flange part KT of the auxiliary cylinder part KS are formed in a stepped shape extending in the radial direction in a state orthogonal to the axis of the flexible tube 3. In this case, when the flexible tube 3 is inserted into the waterproof cap K for piping, the flexible tube 3 is inserted into the waterproof cap K for piping. It becomes easy to get caught in the step-like connecting cylinder part KC and the flange part KT.

Further, by attaching the auxiliary cylinder part KS to the main body cap KH in such a form that the entire outer surface of the collar part KT of the auxiliary cylinder part KS is applied to the entire inner surface of the connection cylinder part KC of the main body cap KH, protection is achieved. It is configured to accurately suppress the intrusion of rainwater or the like into the inside of the pipe 4.
Incidentally, in this embodiment, the collar part KT is formed so that the front-end | tip part may be in contact with the inner surface of the large-diameter side outer fitting part KB of the main body cap KH.

[Second Embodiment]
Next, a second embodiment will be described. This second embodiment shows another form of the auxiliary cylinder portion KS, and the other configuration is the same as that of the first embodiment, so the following description will be given. Then, only a different part from 1st Embodiment is demonstrated, and detailed description is abbreviate | omitted about the structure similar to 1st Embodiment.

As shown in FIG. 5, the auxiliary outer fitting part KG of the auxiliary cylinder part KS has a plurality of (two in this embodiment) cylindrical outer fitting parts 7 and 8 having different diameters. It is provided in a form close to KT and arranged in the longitudinal direction of the flexible tube.
The two outer fitting portions 7 and 8 are connected by a truncated cone-shaped cylindrical portion 9 that becomes smaller in diameter as it approaches the outer fitting portion 8 on the smaller diameter side.

Further, of the two outer fitting portions 7 and 8, the end portion side portion on the side away from the collar portion KT on the surface of the outer fitting portion 7 connected to the end portion on the side where the other outer fitting portion 8 is separated from the collar portion KT. In addition, a cutting line L along the circumferential direction is formed.
That is, in the present embodiment, the cutting line L is formed on the surface of the outer fitting portion 7 adjacent to the collar portion KT of the two outer fitting portions 7 and 8.

  The cutting line L can be formed into a continuous concave groove shape or an intermittent concave groove shape, and is continuous with a coloring material in a color different from the surface of the waterproof cap K for piping. It can also be formed in a linear shape or an intermittent linear shape.

  Of the two outer fitting portions 7 and 8, the inner diameter of the outer fitting portion 7 on the large diameter side is 25 mm corresponding to the flexible pipe 3 having a nominal diameter of 20A, and the inner diameter of the outer fitting portion 8 on the smaller diameter side. However, it is 19 mm corresponding to the flexible pipe 3 having a nominal diameter of 15A.

Therefore, when the nominal diameter of the flexible tube 3 is 15A, as shown in FIG. 5, the auxiliary cylinder portion KS having the two outer fitting portions 7 and 8 is attached to the main body cap KH.
Then, the large-diameter side external fitting portion KB of the main body cap KH is externally fitted in close contact with the protective tube (CD tube) 4, and the small-diameter side external fitting portion 8 of the auxiliary cylinder portion KS is fitted to the flexible tube 3. The waterproof cap K for piping is mounted in a form that fits in a close contact state.

Further, when the nominal diameter of the flexible tube 3 is 20A, the outer fitting portion 7 on the large diameter side is cut by the cutting line L, the outer fitting portion 8 on the small diameter side is cut off, and the outer portion on the large diameter side is cut off. The auxiliary cylinder part KS provided with the fitting part 7 is attached to the main body cap KH. The auxiliary cylinder part KS in this state corresponds to the first auxiliary cylinder part S1 in the first embodiment.
Therefore, the external fitting portion 7 on the large diameter side of the auxiliary cylinder portion KS is externally fitted on the flexible tube 3 protruding from the protective tube 4, and the large diameter external fitting portion KB of the main body cap KH is externally fitted on the protective tube 4. Attach a waterproof cap K for piping. Incidentally, since this mounting state is the same as the mounting state of the first auxiliary cylinder part S1 in the first embodiment (see FIG. 3), the illustration is omitted.

  Further, as described above, the two outer fitting portions 7 and 8 are connected by the truncated cone-shaped cylindrical portion 9 that becomes smaller in diameter toward the outer fitting portion 8 on the small diameter side, and the flexible pipe 3 is waterproofed for piping. When the flexible tube 3 is moved from the large-diameter side outer fitting portion KB of the main body cap KH toward the small-diameter side outer fitting portion KA when inserted into the cap K, the guide action of the cylindrical portion 9 The flexible tube 3 can be inserted satisfactorily.

Incidentally, since the cutting line L is formed in the outer fitting portion 7 that is disengaged from the truncated cone-shaped tube portion 9, the thickness of the outer fitting portion 7 in the radial direction is smaller than that of the tube portion 9, The portion 7 can be easily cut, and the shape of the outer fitting portion 7 can be made into an appropriate cylindrical shape after cutting.
In other words, when the cutting line L is formed in a portion corresponding to the truncated cone-shaped tube portion 9, not only is it difficult to cut the outer fitting portion 7, but after cutting, the distal end portion of the outer fitting portion 7 is For example, the outer fitting portion 7 cannot be formed into an appropriate cylindrical shape such as being tapered.

[Third Embodiment]
Next, a third embodiment will be described. This third embodiment shows another form of the main body cap KH, and the other configuration is the same as that of the first embodiment. Only the parts different from the first embodiment will be described, and detailed description of the same configuration as the first embodiment will be omitted.

  As shown in FIG. 6, the convex engagement portion 10 that engages the concave portion of the bellows-like protective tube (CD tube) 4 in which annular concave portions and convex portions are alternately arranged in the large-diameter side outer fitting portion KB. The main body cap KH is positioned with respect to the protective tube (CD tube) 4.

  That is, in the first embodiment, the main body cap KH is attached to the protective tube (CD tube) 4 by externally fitting the large-diameter side outer fitting portion KB to the protective tube (CD tube) 4. As shown in FIG. 6, by engaging the engaging portion 10 with the concave portion of the bellows-shaped protective tube (CD tube) 4 in which the annular concave portions and the convex portions are alternately arranged as shown in FIG. The main body cap KH is positioned with respect to the tube (CD tube) 4.

In this case, as shown in FIG. 6, in addition to externally fitting the large-diameter side outer fitting portion KB to the protective tube (CD tube) 4, an engaging portion 10 may be provided. Although not shown, the large-diameter side external fitting portion KB is externally fitted to the protective tube (CD tube) 4 in a loosely fitted state (a state of loosely fitting with play). A joint portion 10 may be provided.
In addition, although it is preferable to form the engaging part 10 in the cyclic | annular form connected over the perimeter, you may form in the form which exists intermittently along the circumferential direction, and a partial range of the circumferential direction It may be carried out in the form of forming only in the above.

[Another embodiment]
Next, another embodiment is listed.
(1) In the said 1st-3rd embodiment, although the flexible pipe 3 of nominal diameter 25A, 20A, 15A was illustrated as the flexible pipe 3, this invention is applied also to the flexible pipe 3 of other diameters. It can be done.

(2) In the second embodiment, the auxiliary outer fitting portion KG of the auxiliary cylinder portion KS is illustrated as having two outer fitting portions 7 and 8, but when there are many target flexible pipes 3, You may implement with the form provided with three or more external fitting parts.

(3) In the first to third embodiments, the case where the inner diameter of the large-diameter side outer fitting portion KB of the main body cap KH is 42 mm corresponding to the protective tube 4 having a nominal diameter of 25A is exemplified. The inner diameter of the radial outer fitting portion KB can be changed according to the size of the protective tube 4.

(4) In the first to third embodiments, the entire outer surface of the collar part KT of the auxiliary cylinder part KS is applied to the entire inner surface of the connection cylinder part KC of the main body cap KH. Various forms of applying the flange part KT to the connecting cylinder part KC can be changed, for example, by providing a convex part on a part of the outer surface and applying the convex part of the flange part KT to the connecting cylinder part KC.
In addition, when attaching the auxiliary | assistant cylinder part KS to the main body cap KH, you may make it adhere | attach the collar part KT and the connection cylinder part KC with an adhesive agent.

  The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in the other embodiment, as long as no contradiction occurs. The embodiment disclosed in this specification is an exemplification, and the embodiment of the present invention is not limited to this. The embodiment can be appropriately modified without departing from the object of the present invention.

3 Flexible tube 4 Protective tube 7 Outer fitting part 8 Outer fitting part 9 Cylinder part KA Small diameter side outer fitting part KB Large diameter side outer pipe part KC Connection cylinder part KG Auxiliary outer fitting part KH Main body cap KS Auxiliary cylinder part KT Gutter part L Cutting line

Claims (5)

A cylindrical small-diameter side outer fitting part that fits externally on the flexible pipe, a cylindrical large-diameter side outer fitting part that fits externally on a protective pipe that covers the flexible pipe, and the small-diameter side outer part from the large-diameter side external fitting part The synthetic resin is formed in a state where the diameter becomes smaller as it approaches the fitting portion, and the connecting cylinder portion connecting the large-diameter side outer fitting portion and the small-diameter side outer fitting portion is aligned in the longitudinal direction of the flexible pipe. A waterproof cap for piping comprising a main body cap integrally molded at
An auxiliary cylinder portion having a cylindrical auxiliary outer fitting portion that is smaller in diameter than the outer fitting portion on the small diameter side and that is fitted on the flexible pipe, and a flange portion that extends radially outward from one end portion of the auxiliary outer fitting portion. A waterproof cap for piping attached to the main body cap in a state where the auxiliary outer fitting portion is positioned inside the small-diameter side outer fitting portion and the flange portion is applied to the connecting tube portion. The connecting cylinder part is formed in a truncated cone shape having a smaller diameter as it approaches the outer fitting part on the smaller diameter side,
The waterproof cap for piping according to claim 1, wherein the flange portion is formed in a truncated cone shape having a smaller diameter as it approaches the auxiliary outer fitting portion.   The said auxiliary | assistant external fitting part is equipped with the several cylindrical external fitting part from which a diameter differs in the form which closely approaches the said collar part, and is arranged in the longitudinal direction of the said flexible pipe, so that a diameter is large. The waterproof cap for piping according to 2.   Of the plurality of outer fitting portions, the other outer fitting portion is along the circumferential direction at the end portion side portion on the side away from the flange portion on the surface of the outer fitting portion that is continuous with the end portion on the side away from the flange portion. 4. The waterproof cap for piping according to claim 3, wherein a cutting line is formed.   The waterproofing for pipes according to claim 3 or 4, wherein adjacent outer fitting portions among the plurality of outer fitting portions are connected by a truncated cone-shaped tube portion having a smaller diameter as it approaches the outer fitting portion on the small diameter side. cap.

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