JP2833516B2 - Sealing member and sealing method used for cable junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable connection box having excellent workability and a sealing method.

[0002]

2. Description of the Related Art Conventionally, as one method for making a cable connection portion airtight, a cable connection portion is introduced into a connection box, and both sides of the connection box are connected to a cable 7 and a connection box 6 as shown in FIGS. It was press-fitted and fixed via a cylindrical seal member 10 between them. Here, an unvulcanized rubber adhesive member 12 is provided on the inner surface and the outer surface of the seal member 10, and pressure is applied to the adhesive member 12 to secure airtightness.

[0003]

When such a method is used, since the inner diameter of the seal member 10 is set, it cannot be applied to cables having different outer diameters. I needed to prepare.
Also, the airtightness could not be maintained unless the adhesive member was provided again for the slit portion 11, and the assembling work was complicated. Therefore, an object of the present invention is to provide a sealing structure and a sealing method for a cable connection box which solves such a problem.

[0004]

According to the present invention, there is provided a seal structure for a cable connection box, comprising: a connection box; a seal member held on each side of the connection box; and a connection portion gripped around the axis of the seal member. A sealing structure of a cable connection box comprising a cable having: a cylindrical member having a slit in an axial direction, having at least two ring-shaped ribs on an outer surface of the cylindrical member; On both sides of the inner surface of the body, there is no flared shape with a wide inside and a narrow outside, folds made of elastic material are provided, and adhesive members are introduced between the ribs and between the folds and folds, respectively. It is characterized by having been done.

Further, a method of sealing a cable connection box according to the present invention comprises forming a cable having a connection portion, a connection box for storing the connection portion and the cable, and a cylinder having a slit in an axial direction. A step of preparing at least two ring-shaped ribs on the outer surface and a trumpet-shaped sealing member having a wide inner side and a narrower outer side on both inner side surfaces of the cylindrical body; A step of introducing an adhesive member between the folds and the folds, a step of opening two slits of the seal members to cover the cable, and a step of crimping the seal members holding the cable to both sides in the connection box Fixing step.

In the above method, it is preferable that a groove is provided in the slit portion, and when the sealing member is fixed to both sides in the connection box by pressure bonding, it is preferable that an extra adhesive member fills the groove.

[0007]

According to the above construction, the seal member of the present invention is provided with elastic folds on both inner surfaces thereof and is formed by introducing an adhesive member between the folds. Can be easily coped with by deformation of the folds and the adhesive member. In addition, a groove is provided in the slit portion, and an extra member overflowing due to pressure by an adhesive member introduced between the folds fills the groove, so it is not necessary to seal the slit portion again. Therefore, the assembly work is simple.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description. FIG. 1 is a longitudinal sectional view showing a seal structure of a cable connection box according to the present embodiment,
FIGS. 2 and 3 are perspective views of a seal member applied to the connection box. The connection box 6, the seal members 1 respectively held on both sides in the connection box, and the connection gripped at the axial center of the seal member. And an adhesive member 5 is introduced between the seal member 1 and the inner surface of the connection box 6 and between the seal member 1 and the outer surface of the cable 7, respectively.

The cable connection box 6 has a cylindrical shape in which metal semi-cylindrical members are usually overlapped with each other, and has a sealing member 1 on both sides thereof for holding the cable at the center of the shaft and ensuring airtightness. .

The sealing member 1 has a cylindrical body having a slit 8 in the axial direction, and has at least two ring-shaped ribs 2 on the outer surface of the cylindrical body. There is provided a pleat 3 made of an elastic material without a trumpet-shaped narrowed. Seal member 1
Is formed of vulcanized ethylene propylene rubber, nitrile rubber, or elastomer resin, has weather resistance, and needs to be appropriately deformed when pressed and fixed through a cable in the cable connection box 6.

Adhesive members 5 are respectively introduced between the ribs and between the folds and the folds. More preferably, a groove 4 is provided in a slit portion between the ribs,
When the introduced adhesive member 5 presses and fixes the semi-cylindrical cable connection box 6, it overflows and fills the groove 6 to maintain the airtightness between the slits 8.

Therefore, the adhesive member 5 is preferably an adhesive material such as unvulcanized butyl rubber or polyurethane resin which easily deforms and flows under an external pressure. The adhesive member 5 is integrally molded in advance so as to fill the gap between the seal member and the cable or the seal member and the connection box, and is embedded between the ribs and between the folds and the folds. 5 is covered with release paper and peeled off at a factory or site to assemble.

The seal member 1 of the present invention is provided with elastic pleats 3 on both inner surfaces thereof, and is formed by introducing an adhesive member 5 between the pleats. In addition, it is possible to easily cope with the deformation of the adhesive member 5.

Next, a method of sealing the connection box will be described. A step of preparing a cable 7 having a connection portion, a connection box 6 for accommodating the connection portion and the cable, and the above-described sealing member 1; In between, a step of introducing the adhesive member 5, a step of opening the two sealing members 1 to cover the cable 7 by opening their slit portions 8, and a step of attaching the sealing member 1 holding the cable 7 to the inside of the connection box 6. Press-fixing both sides.

The slit portion 8 is provided with a groove 4.
The member in which the adhesive member 5 introduced between the folds 3 overflows due to pressure fills the groove, so that it is not necessary to seal the slit portion again, and the assembling operation is simplified.

[0016]

As described above, according to the present invention,
Since one sealing member can be applied to various cable outer diameters, the number of types of parts is reduced and connection work is simplified. In addition, the sealing process of the slit part is unnecessary,
Workability can be improved. Further, since the adhesive member is integrally formed so as to fill the gap between the seal member and the cable or the seal member and the connection box, or is previously embedded in the factory, the connection work on site is simplified.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a seal structure of a cable connection box according to the present embodiment.

FIG. 2 is a perspective view of a seal member applied to the connection box of the present embodiment.

FIG. 3 is a sectional view of a seal member applied to the connection box of the present embodiment.

FIG. 4 is a perspective view of a seal member applied to a conventional connection box.

FIG. 5 is a longitudinal sectional view showing a conventional cable junction box sealing structure.

[Explanation of symbols]

 1, 10: seal member 2: rib 3: fold 4: groove 5, 12: adhesive member 6: connection box 7: cable 8, 11: slit

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-136185 (JP, A) JP-A-1-120484 (JP, A) JP-A-3-43972 (JP, A) JP-A-2- 217684 (JP, A) JP2-4065 (JP, U) JPN 55-93982 (JP, U) JP 4-711115 (JP, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) H02G 3/08 H01R 13/52

Claims (6)

(57) [Claims] 1. A wrapper having a cylindrical body having a slit in an axial direction, having at least two ring-shaped ribs on the outer surface of the cylindrical body, and having a wide inside and a narrow outside on both inner surfaces of the cylindrical body. A seal member for use in a cable junction box, wherein said seal member is provided to face each other and is formed of an elastic material. 2. An adhesive member is introduced between the ribs and between the folds and between the folds and the folds, respectively.
Seal member described in 3. The slit portion is provided with a groove in which an extra adhesive member overflows.
The seal member according to item 1. 4. The seal member according to claim 1, wherein the seal member is formed of a vulcanized ethylene propylene rubber, a nitrile rubber, or an elastomer resin. 5. The seal member according to claim 2, wherein the adhesive member is an unvulcanized butyl rubber or a polyurethane resin. 6. A cable having a connection portion, a connection box for storing the connection portion and the cable, and a cylindrical body having a slit in an axial direction, and at least two ring-shaped ribs are provided on an outer surface of the cylindrical body. A step of preparing a sealing member provided on both sides of the inner surface of the cylindrical body, facing each other with a trumpet-shaped fold having a wide inside and a narrow outside; In between, a step of introducing an adhesive member, a seal member with an adhesive member is prepared in advance, the two seal members with an adhesive member are opened in their slits and covered with a cable, And a step of crimping and fixing the gripped seal members to both sides in the connection box.