JPH087663Y2 - Holder for closing the pipe end - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an end portion of a protective tube such as a tube or a sleeve that protects a linear member such as a cord or a cable inserted therein. The present invention relates to a pipe-end closing holder that is suitable for closing while maintaining waterproofness in a pulled-out state.

[Conventional technology]

In various equipments, devices, etc., the end of the protective tube such as a conduit for protecting the cord wiring is blocked while keeping the waterproof property in a state where the cord wiring (linear member) is pulled out from this end of the protective tube. Tube end closing means are used. That is, as the pipe end closing means of this type, a bellows-shaped boot portion or the like having a tubular portion fitted to the end portion of the protective pipe on the inner end side and formed on the outer end side is used. A shape is used that binds and holds a linear member. And
The tubular portion is fixed to the end portion of the protective tube with a set screw, and the bellows-shaped boot portion and the like are provided so as to bind and hold the linear member by an appropriate fastening means. It was attached.

By the way, in the above-mentioned pipe end closing means, what is needed most is that the linear member drawn out from the end of the protective pipe is properly and reliably bound and held, and further protected between the linear member. There may be a structure that can reliably seal between the pipe and ensure waterproofness, and conventionally, in general, between the protective pipe and the tubular portion, or between the bellows-shaped boot portion and the linear member, By injecting a sealing material such as silicon or applying a sealing material, the sealing property at each joint is ensured, and the waterproof condition at the linear member withdrawal part from the protective tube is surely obtained. There is.

[Problems to be solved by the device]

However, in the waterproof structure in the conventional pipe end closing means described above, when closing the pipe end in the state where the linear member is pulled out, a work step of injecting and curing the sealing material is necessary, and workability is improved. It is not only a problem in terms of surface quality, but also lacks certainty in obtaining a reliable sealed state, and it is also difficult to hold the linear member in the required state in a tightly bound condition, and it is inevitable that costs will increase. However, it is desired to take some measures capable of solving such problems.

[Means for solving the problem]

In order to meet such a demand, the holder for closing a tube end according to the present invention is provided with a protective tube end portion when the linear member is pulled out from the end portion of the protective tube for inserting the linear member while tightly holding the waterproof member in a waterproof manner. A holder main body having a cylindrical portion on the inner end side that is fixed by screwing and fixed to the outer end and a threaded portion is formed on the outer periphery of the small diameter portion, and a screw portion on the outer periphery of the small diameter portion. The tightening nut that is assembled by screwing, the rubber bush that is inserted into the small diameter part of the holder body and has one end that extends outward from the small diameter part, and the small diameter part of the holder body that surrounds the rubber bush. It is configured by a fastening ring which is fitted and interposed between the tip and the tightening nut and is elastic in the radial direction.

[Action]

According to the present invention, the tubular portion of the holder body is fitted and fixed to the end portion of the protective tube, and the fastening ring that is elastic in the radial direction is provided between the small diameter portion of the holder body and the tightening nut. By sandwiching and reducing the diameter in the radial direction and binding and holding the linear member via the rubber bush, it is possible to draw out from the end of the protective tube while maintaining a reliable sealing property with the linear member. .

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

1 to 3 show an embodiment of a holder for closing a pipe end according to the present invention. In these drawings, in this embodiment, a cord 1 as a linear member is a simple circular pipe. A case will be described in which the body is fitted into the protective tube 2 and is used for pulling out from the end portion while keeping the waterproof property.

The pipe end closing holder shown by reference numeral 10 in these figures has a cylindrical portion 12 fitted inside the end portion of the protective tube 2 for inserting the linear member and fixed by screwing with set screws 16, 16. A holder body 11 having a threaded portion 13b formed on the outer circumference of the small diameter portion 13 on the outer end side and the outer end side, and a threaded portion on the outer circumference of the small diameter portion 13
A tightening nut 15 that is screwed and assembled to the 13b, a rubber bush 14 that is inserted into the small diameter hole 13a in the small diameter portion 13 and has one end extending outward from the small diameter portion 13 and the rubber bushing. 14 is characterized in that it is composed of a fastening ring 20 that is radially expandable and contractable and is fitted around the outer periphery of the small diameter portion 13 of the holder body 11 and the tightening nut 15.

Here, the holder main body is provided on the outer peripheral portion of the end portion of the protection tube 2.
The large hole 12a in the tubular portion 12 of 11 is fitted in a state of being press-fitted and fixed by the set screws 16 and 16 so that the sealing property in this portion is secured. Has become. In this embodiment, a flange portion 14a is provided on the inner end side of the rubber bush 14, and the flange portion 14a is located in the step portion between the large diameter hole 12a and the small diameter hole 13a in the holder body 11. It is configured so that the sealing property at the end of the protective tube 2 can be reliably obtained. Further, a tapered surface 13c corresponding to one tapered surface 25 of the outer peripheral portion of the fastening ring 20 described later is formed on the inner portion of the tip portion of the small diameter portion 13 of the holder body 11.

Further, on the inner peripheral portion of the tightening nut 15, the screw portion 13
A threaded portion 15a that is screwed into b is formed, and the inner side surface of the inward flange portion 15b on the outer end side thereof has a tapered surface corresponding to the other tapered surface 26 of the outer peripheral portion of the fastening ring 20 described later. Formed as 15c.

On the other hand, as is clear from FIGS. 4 (a), 4 (b) and 4 (c), the fastening ring 20 is made of various synthetic resin materials such as nylon, vinyl chloride, polypropylene and the like. As described above, it is formed of a material having an elastic force so as to have a substantially annular shape as a whole, and the end faces 20a, 20b in the axial direction thereof are equidistantly arranged at predetermined intervals in the circumferential direction, and both end faces 20a, 20b. A plurality of slits 21 are formed so as to be alternately positioned between them so as to be cut in the axial direction so as to have a substantially V shape in which the respective cut end sides are widened. Therefore, this fastening ring 20
Has a substantially saw-tooth shape when viewed from the circumferential direction, and can elastically deform by the gap of each slit 21, so that it can be expanded and contracted in the radial direction, and in particular, its inner peripheral portion 22 is elastically deformed uniformly over the entire circumference. I will get it.

Here, the inner peripheral portion 22 of the fastening ring 20 has an outer diameter so as to be fitted to the rubber bush 14 provided in the small-diameter portion 13 of the holder body 11 with the cord 1 inserted therethrough. Forming a circular hole 23 having a size slightly larger than
On the other hand, the outer peripheral portion 24 is formed by taper surfaces 25 and 26 having a central portion in the axial direction as a base portion and having a smaller diameter toward both end surfaces.

And, such a holder 10 for closing the pipe end according to the present invention.
According to this, the tubular portion 12 of the holder body 11 is fitted to the end portion of the protective tube 2 and fixed by screwing, and the fastening ring 20 that is expandable and contractible in the radial direction is provided as shown in FIG. As sandwiched between the small diameter portion 13 of the holder body 11 and the tightening nut 15, the tightening nut 15 is sequentially screwed to the holder body 11 side to reduce the diameter in the radial direction. At the same time, the cord 1 can be tightly bound and held over the entire circumference through the rubber bush 14 that is reduced in diameter in the radial direction. It is possible to pull out from the end of 2.

Here, in this fastening ring 20, the tapered surfaces 25 and 26 on the outer circumferences on both end sides are the tapered surface 13c at the tip of the small diameter portion 13 of the holder body 11 and the tapered surface 15c of the inward flange portion 15b of the tightening nut 15. It will be easily understood that, by abutting against, the radial compression force of the nut 15 causes the radial component force to be inwardly compressed and reduced, and the slit 21 is reduced in diameter.

Therefore, the rubber bush 14 has the fastening ring 20.
It is clamped around the entire circumference by
4) and the cord 1 will come into close contact with each other in a reliable pressure contact state, whereby the cord 1 can be prevented from coming off properly and reliably, and the effect can be sufficiently exerted in terms of sealing property. It is a thing. Of course, both ends of the fastening ring 20 are sandwiched between the holder body 11 and the nut 15, and the movement thereof in the axial direction is restricted. In addition, as shown in FIG. 4, the fastening ring 20 is
The inner peripheral portion 22 can come into contact with the outer peripheral portion of the rubber bush 14 in a wavy shape over the entire circumference without interruption, and thus, sealing at this portion can be surely performed.

Here, the rubber bush 14 is attached to the cord 1 as described above.
If it is interposed between the fastening ring 20 and the fastening ring 20, the elastic deformation of the rubber bush 14 can be utilized to obtain a high tightening holding state and a high sealing property, but it goes without saying that this may be omitted.

Needless to say, the holder 10 for closing the tube end according to the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part can be appropriately modified or changed.

For example, the fastening ring 20 may be formed in a substantially frustoconical shape having a taper surface whose outer peripheral portion 24 is inclined only in one direction. When such a fastening ring 20 is used, Corresponding to this, holder body 11, tightening nut 15
A taper surface may be formed on any of the above so that the diameter can be reduced in the radial direction.

Further, in the above-described embodiment, in order to secure the tightly held state and the sealing property of the cord 1, the fastening ring 20 is secured.
Although the case where the rubber bush 14 is also used together has been described above, it goes without saying that the rubber bush 14 can be omitted if necessary.

[Effect of device]

As described above, according to the holder for closing a tube end according to the present invention, when the linear member is pulled out from the end portion of the protective tube for inserting the linear member while tightly holding the waterproof member in a tightly held state, A holder main body having a cylindrical portion that is fitted and screwed and fixed on the inner end side and a screw portion is formed on the outer circumference of the small diameter portion on the outer end side, and a screw portion on the outer circumference of the small diameter portion. The tightening nut that is assembled together, the rubber bush that is inserted into the small diameter part of the holder body and has one end extended outward from the small diameter part, and the tip of the small diameter part of the holder body at the outer periphery of this rubber bush. Since it is configured with a fastening ring that is elastically expandable in the radial direction and is interposed between the fixing nut and the tightening nut, the holder body is attached to the end of the protective tube despite the simple and inexpensive configuration. Fit and fix the tubular part of the The ring for use is sandwiched between the small diameter part of the holder body and the tightening nut to reduce the diameter in the radial direction, and the linear member is bound and held via the rubber bush, ensuring a reliable seal with the linear member. It is possible to pull out from the end of the protective tube while maintaining the property, and there is no need for the troublesome work of injecting a sealing material as in the past, and there are various practically excellent effects such as reliable waterproofness. is there.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a holder for closing a pipe end according to the present invention, FIG. 2 is a schematic cross-sectional view for explaining the mounted state, and FIG. 3 is a pipe end according to the present invention. FIG. 4 (a), (b) and (c) are schematic exploded perspective views for explaining the schematic configuration of the closing holder, and FIGS. 4 (a), (b) and (c) show an embodiment of a fastening ring suitable for use in the pipe end closing holder according to the present invention. FIG. 3 is a side view and both end views thereof. 1 ... Cord (linear member), 2 ... Protective tube, 10 ... Holder for closing tube end, 11 ... Holder body, 12 ... Cylindrical part, 13 ...
… Small diameter part, 13b …… Screw part, 13c …… Tapered surface, 14 …… Rubber bush, 15 …… Tightening nut, 15c …… Tapered surface, 16 …… Set screw, 20 …… Fastening ring, 20a, 20b …
… Axial ends, 21 …… slits, 22 …… inner circumference,
23 ... Circular hole, 24 ... Outer periphery, 25, 26 ... Tapered surface.

Claims (2)

[Scope of utility model registration request] 1. A holder for closing a pipe end, which is attached to an end portion of a protective tube for inserting a linear member and tightly holds the linear member pulled out from the end portion while keeping the waterproof property. A holder main body having a cylindrical portion on the inner end side that is fitted and screwed to the end and fixed on the outer end side, and a screw portion is formed on the outer periphery, and a small diameter portion of the holder main body. A tightening nut that is screwed and assembled to the thread portion of the outer circumference, a rubber bush that is inserted into the small diameter portion of the holder body and has one end extending outward from the small diameter portion, and the outer circumference of the rubber bush. A pipe end closing holder, characterized in that it comprises a fastening ring that is fitted between the tip of the small diameter portion of the holder body and a tightening nut. 2. The fastening ring according to claim 1, wherein the fastening ring is formed as an annular body in which at least one side portion of an outer peripheral portion is made of an elastic material and has a taper surface, and each cut end is formed on both end surfaces in an axial direction thereof. A plurality of substantially V-shaped slits that are cut in the axial direction so that the sides widen are alternately formed at predetermined intervals in the circumferential direction from the end portions facing each other. The inner peripheral portion of at least one of the nuts engages with the tapered surface of the outer peripheral portion of the fastening ring, and the outer peripheral portion of the linear member is clamped and held by a rubber bush with a diameter reduction amount corresponding to the slit gap. A holder for closing a pipe end, which is characterized in that