JPH0965548A - Cable inlet sealing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the formation of gaps, such as delta voids, and improve the reliability of seal by inclining a portion that divides the deformed layer of a slit for inserting a cable into an insertion hole at an angle, other than perpendicular, to a surface facing the cable inlet in the deformed layer or an insertion surface. SOLUTION: A fin-like internal projection 20 protruded toward the opposite side through a slit 13, is formed on internal bent portions 19. Meanwhile, a similar fin-like external projection 22 is formed on external bent portions 21. As a result a cable inlet sealing member 10, when fit between a cable inlet 14 and a cable 11, fills the gap between both the internal bent portion 19 and the circumference of the cable 11 with the internal projection 20, and fills the gap between both the external bent portion 21 and the cable inlet 14 with the external projection 22. The cable inlet sealing member 10 thereby brings deformed layer 18 into tight contact with the outside surface of the cable 11 and the inside surface of the cable inlet 14. This prevents the formation of gaps, such as delta voids, and improves the reliability of seal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable introduction hole sealing member used for a cable introduction hole formed in a cable connection box or the like.

[0002]

2. Description of the Related Art Conventionally, as a sealing structure for water-tightly sealing a space between an inner surface of a cable introduction hole formed in a cable connection box or the like and an outer peripheral surface of a cable inserted in the cable introduction hole,
(1) Laminate a sealing tape on the outer peripheral surface of the cable,
(2) A ring-shaped elastic body adapter having an insertion hole into which the cable is inserted is attached to the outer peripheral surface of the cable to fill the clearance between the inner surface of the cable introduction hole and the outer peripheral surface of the cable. (3) Inner surface of the cable introduction hole A ring-shaped elastic body in which a deformable layer made of a soft elastic body having a hardness of 10 degrees or less measured by a hardness meter specified by JIS standard A is formed on the outer peripheral surface abutting against Generally, an adapter is attached to the outer peripheral surface of the cable.

[0003]

By the way, in the above-mentioned sealing structure, (1) has a problem that the working efficiency is low due to the enormous number of laminated sealing tapes, and it is difficult to obtain sufficient water tightness. there were. In (2), it is necessary to prepare in advance a large number of types of elastic body adapters having internal holes corresponding to the cable diameter and to select one of these elastic body adapters that fits the cable diameter. However, there is a problem in that the elastic adapter is wasted and the cost is increased. Further, in many cases, it is necessary to laminate a sealing tape on the outer peripheral surface of the cable to adapt the cable diameter to the inner insertion hole, which is unsatisfactory in work efficiency.

As for (3), as shown in FIGS. 4 and 5, the insertion hole 2 formed in the central portion of the elastic adapter 1 is used.
The slit 4 for inserting the cable 3 into the
The elastic adapter 1 is formed so as to communicate with the inside and outside of the slit. When the elastic adapter 1 is fitted between the cable 3 and the cable introduction hole 5, it is formed at the end of the slit 4 on the inner insertion hole 2 side. Between the deformed layer 6 and the cable 3 formed, a triangular Δ void 8 is formed between the deformed layer 6 formed at the end of the slit 4 on the outer peripheral surface 7 side of the elastic body 1 and the cable introduction hole 5. There was a problem that they were easily affected. This Δ void 8 is difficult to eliminate even if the compressive force acting on the elastic body adapter 1 and the cable 3 in the cable introduction hole 5 is increased, which hinders the improvement of sealing reliability.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a cable introducing hole sealing member that improves the work efficiency of sealing the cable introducing hole and the reliability of the sealing. It is a thing.

[0006]

In order to solve the above-mentioned problems, the cable introducing hole sealing member according to the first aspect of the present invention is provided with an inner surface of the cable introducing hole formed in a cable connection box or the like and a cable inserted into the cable introducing hole. A cable introduction hole sealing member that seals the cable introduction hole in a watertight or airtight manner by being interposed between the outer peripheral surface and a support elastic body having an insertion hole at the center for inserting the cable And a deformation layer formed on the outer peripheral surface of the support elastic body facing the inner surface of the cable introduction hole and a deformation layer formed on the inner surface of the insertion hole, the cable being formed in a softer elastic body than the support elastic body. The slit for insertion is made to communicate with the inside and outside of the insertion hole, and the part that divides the deformation layer of the slit is inclined at an angle other than perpendicular to the surface of the deformation layer facing the cable introduction hole or the insertion surface. That the above It was determined means.

In order to solve the above problems, the cable introducing hole sealing member according to a second aspect is provided between an inner surface of the cable introducing hole formed in a cable connection box and the like and an outer peripheral surface of the cable inserted into the cable introducing hole. A cable introducing hole sealing member that seals the cable introducing hole in a watertight or airtight manner by being interposed, and a supporting elastic body having an inner insertion hole in the center for inserting the cable, and the supporting elastic body. In comparison, the support elastic body is provided with an outer peripheral surface facing the inner surface of the cable introduction hole of the supporting elastic body and a deformation layer formed on the inner surface of the insertion hole, and has a slit for inserting the cable into the insertion hole. The means for solving the above-described problems is to form a protrusion that is communicated with the inside and outside of the insertion hole and is divided by the slit and that protrudes toward the other side on at least one side of the opposing deformation layer.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a cable introducing hole sealing member of the present invention will be described below with reference to FIGS. Reference numeral 10 in the drawing is a cable introduction hole sealing member of the present embodiment. The cable introduction hole sealing member 10 has an inner insertion hole 12 into which a cable 11 such as a communication cable is inserted, and the cable 11 is inserted through a slit 13 communicating with the inside and the outside of the insertion hole 12. The cable 11 which can be inserted into the insertion hole 12 and which is inserted into the insertion hole 12 is connected to the cable connection box 1
Cable introduction hole 14 opened in a circular shape in a structure such as 4a
The support elastic body 15 that can be supported at a substantially predetermined position is mainly configured. The support elastic body 15 is the cable introduction hole 1
4 is a substantially donut-shaped member that substantially matches 4. The supporting elastic body 15 is made of an elastic material such as EPT (ethylene-propylene rubber), EPDM (ethylene-propylene-diene terpolymer), thermoplastic elastomer, etc., and has a hardness of 30 to 80 degrees, preferably 55 degrees. Formed in
Moreover, the slit 11 is manually pushed open to open the cable 11
Has elasticity such that it can be inserted into the insertion hole 12 and can return to its original shape after insertion. The support elastic body 15 is formed in such a size that an appropriate compression force acts by being fitted into the cable introduction hole 14.

The cable introducing hole 14 of the support elastic body 15
On the outer peripheral surface 16 facing the inner surface, the entire inner surface of the insertion hole 12, and the entire facing surface 17 facing the slit 13, a deformation layer 18 made of an elastic body softer than the supporting elastic body 15 is formed. The deformable layer 18 is made of EPT, EPDM, thermoplastic elastomer, or the like and has a hardness of about 0 to 10 degrees, and has flexibility such that it can be elastically deformed by being pressed by a human fingertip. The deformation layer 18 formed on the inner surface of the insertion hole 12 is
It is formed in a C shape divided by the slit 13. A boundary portion between the inner surface of the insertion hole 12 of the supporting elastic body 15 and the slit 13 is covered with an internal bent portion 19 formed by bending the deformable layer 18 at about 90 degrees. Internal bend 19
Are formed so as to face each other through a slit 13, and one side thereof has an internal protrusion (projection) 2 protruding toward the other side.
0 is projected. The internal protrusion 20 has a fin shape, and when the slit 13 is closed, the internal bent portion 19 on the other side is formed.
It is supposed to wrap. The deformation layer 18 is
Although it is integrated with the support elastic body 15, the support elastic body 1
It may be separate from 5.

The deformable layer 18 formed on the outer peripheral surface 16 of the support elastic body 15 facing the inner surface of the cable introduction hole 14 is formed in a C-shape divided by the slit 13. At the boundary between the outer peripheral surface 16 of the supporting elastic body 15 and the slit 13, the outer bending portion 2 is formed by bending the deformation layer 18 at about 90 degrees.
1 is formed. The external bent portions 21 are formed so as to face each other through the slits 13, and external projections (projections) 22 projecting toward the other side are provided on one side thereof so as to project therefrom. The external protrusion 22 has a fin-like shape and is configured to wrap with the external bent portion 21 on the other side when the slit 13 is closed.

The operation and effect of the present invention will be described below. As shown in FIG. 2, the cable introducing hole sealing member 10 includes a cable introducing hole 14 inner surface and the cable inserting hole 14
The cable introduction hole 14 is sealed in a watertight or airtight manner by being fitted in a state of being interposed between the cable 11 and the cable 11 inserted therein. That is, the cable introduction hole sealing member 10
Indicates that the slit 13 is closed by the compressive force generated when the cable introducing hole 14 and the cable 11 are fitted together,
The internal protrusion 20 is wrapped between the internal bends 19 facing each other and sandwiched between the internal bend 19 and the outer peripheral surface of the cable 11, and the external protrusion 22 is wrapped around the external bends 21 facing the external bends 21. It is sandwiched between the bent portion 21 and the inner surface of the cable introduction hole 14. As a result, the deformable layer 18 facing the inner insertion hole 12 adheres to the outer peripheral surface of the cable 11 without a gap, and the deformable layer 18 on the outer peripheral surface 16 of the support elastic body 15 adheres to the cable introduction hole 14 without a gap.

Therefore, the cable introducing hole sealing member 10 of the present embodiment has a cable introducing hole 14 and a cable 11.
When fitted between the inner bent portion 19 and the outer circumferential surface of the cable 11, and between the outer bent portion 21 and the cable introduction hole 14, the inner protruding portion 20 and the outer protruding portion 22 respectively.
Since the deformation layer 18 is filled in with the outer peripheral surface of the cable 11 and the inner surface of the cable introduction hole 14, the formation of gaps such as Δ voids is prevented and the sealing reliability is improved.
As a result, when the cable 11 is a cable for a telecommunication cable, the cable introduction hole 1 of a structure such as the connection box 14a
4, the conductive connection part and the like housed inside is protected, and when the cable 11 is an optical fiber cable, the optical connection part and the like are protected, and the reliability of communication can be maintained for a long time.

The internal projection and the external projection may have a shape other than the fin-like shape as long as they can be wrapped with the internal flexion and the external flexion which are opposed to each other through the slits. They may be formed on opposite sides of the portion or the external bent portion so as to mesh with each other in a zigzag manner, for example.
The cable introducing hole sealing member 10 can be formed in various shapes corresponding to the shape of the cable introducing hole other than the donut shape. Further, the cable introduction hole sealing member 10 may have a plurality of insertion holes. As shown in FIG. 3, the slits may also be formed in the supporting elastic body so as to be inclined at an angle other than perpendicular to the outer surface facing the inner insertion hole of the deformation layer or the cable introduction hole. In this case, it is not necessary to form a protrusion on the deformable layer.

[0014]

As described above, according to the cable introducing hole sealing member of the first aspect, the inner surface of the cable introducing hole formed in the cable connection box and the outer peripheral surface of the cable inserted in the cable introducing hole are provided. A cable introduction hole sealing member for sealing the cable introduction hole in a watertight or airtight manner by being interposed between the support elastic body having an insertion hole in the center for inserting the cable, and the support elastic body. To insert the cable into the inner insertion hole, which is made of an elastic body that is softer than the elastic body, and is provided with an outer peripheral surface facing the inner surface of the cable introduction hole of the supporting elastic body and a deformation layer formed on the inner surface of the inner insertion hole. Of the slit is communicated with the inside and outside of the insertion hole, the portion of the slit that divides the deformation layer is inclined at an angle other than perpendicular to the surface of the deformation layer facing the cable introduction hole or the insertion surface, and the slit is formed. Deformation facing through When at least one side of the cable wraps outside the other side and is fitted between the cable introduction hole and the cable, the deformation layer formed near the end on the insertion hole side of the slit and the cable outer circumference Between the surface and the deformation layer formed near the end of the slit on the outer peripheral surface side of the support elastic body and the cable introduction hole are filled with the deformation layer,
Since the generation of voids or the like is prevented, the sealing reliability is improved, and the excellent effect that the communication reliability can be maintained for a long period of time is achieved.

According to the cable introduction hole sealing member of the second aspect, the cable has an insertion hole at the center for inserting the cable,
A support elastic body capable of inserting the cable into the insertion hole through a slit communicating with the inside and outside of the insertion hole and supporting the cable inserted into the insertion hole at a substantially predetermined position of the cable introduction hole; An elastic body that is softer than the body, and an outer peripheral surface of the supporting elastic body that faces the inner surface of the cable introduction hole and a deformation layer formed on the inner surface of the insertion hole, and the end portion of the slit on the insertion hole side. A protrusion protruding toward the other side is formed on at least one side of the deformation layer facing through the slit at the end portion on the outer peripheral surface side of the support elastic body, and is fitted between the cable introduction hole and the cable. When, and between the deformation layer and the cable outer peripheral surface formed near the end portion of the slit insertion hole side,
The gap between the deformation layer formed near the end of the outer peripheral surface of the supporting elastic body of the slit and the cable introduction hole is reliably filled by the protrusions, so that the formation of gaps such as Δ voids is prevented. Therefore, the reliability of the sealing is further improved, and the excellent effect that the reliability of the communication can be maintained for a long time is exerted.

[Brief description of drawings]

FIG. 1 is a front view showing a cable introducing hole sealing member according to an embodiment of the present invention.

FIG. 2 is a front view showing the operation of the embodiment of the cable introducing hole sealing member of the present invention.

FIG. 3 is a front view showing another aspect of the embodiment of the cable introducing hole sealing member of the present invention.

FIG. 4 is a side sectional view showing a conventional sealing structure.

5 is a front view showing the sealing structure of FIG. 3. FIG.

[Explanation of symbols]

10 ... Cable introduction hole sealing member, 11 ... Cable, 12
… Internal insertion hole, 13… slit, 14… cable introduction hole, 1
5 ... Support elastic body, 16 ... Outer peripheral surface, 18 ... Deformation layer, 20 ...
Projections (internal projections), 22 ... Projections (external projections).

Claims (2)

[Claims] 1. A cable introducing hole by being interposed between an inner surface of a cable introducing hole (14) formed in a cable connection box (14a) and the like and an outer peripheral surface of a cable (11) inserted in the cable introducing hole. Is a cable introduction hole sealing member (10) for water-tightly or watertightly sealing a support elastic body (15) having an insertion hole (12) in the center for inserting a cable, and the support elastic body. In comparison, the support elastic body includes an outer peripheral surface (16) facing the inner surface of the cable introduction hole of the supporting elastic body and a deformation layer (18) formed on the inner surface of the insertion hole. The slit (13) for insertion is communicated with the inside and outside of the insertion hole, and the portion of the slit that divides the deformation layer is at an angle other than perpendicular to the surface of the deformation layer facing the cable introduction hole or the insertion surface. The case is characterized by tilting Le introducing hole sealing member. 2. A cable which is interposed between an inner surface of a cable introduction hole formed in a cable connection box or the like and an outer peripheral surface of a cable inserted in the cable introduction hole to seal the cable introduction hole in a watertight or airtight manner. An inner surface of the cable introducing hole of the supporting elastic body, which is a member for sealing the introducing hole, and which includes a supporting elastic body having an inner insertion hole into which a cable is inserted, and an elastic body softer than the supporting elastic body. And a deformation layer formed on the inner surface of the insertion hole, the slit for inserting the cable into the insertion hole is communicated with the inside and outside of the insertion hole, and the deformation layer is divided by the slit and faces the deformation layer. A cable introducing hole sealing member, characterized in that at least one side is provided with a protrusion (20, 22) protruding toward the other side.