JP2002209324A - Cable connector - Google Patents

Abstract

(57) [Problem] To provide a cable connector using a multi-core packing, the entrance of the through hole of the packing (exposed end).
The present invention provides a cable connector in a simple and convenient form that prevents rolling up of water, oil and the like in a rolled up gap that can be formed in the past, and eliminates anxiety about apparent waterproofness. A packing (3) having a connector body (1), a plurality of cable passage holes (31) disposed in the connector body (1), and penetrating in the axial direction, and a packing (3) are inserted through the packing. Compression means (4, 5) for compressing the exposed side end of the wire hole in a direction to squash.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable connector for holding a cable through an opening in a wall plate of a casing or the like, and more particularly to a cable connector having a multi-core packing capable of holding a plurality of cables. About.

[0002]

2. Description of the Related Art There is a connector provided with a multi-core packing in order to draw a plurality of cables out of a casing or the like or into a casing or the like. FIG.
Shows an example of the connector body, a hollow connector body 101 fixed to a wall plate 100 such as a casing, and a connector body 10.
1 has an elastic gland packing 103 having a plurality of through holes 102 and a cap nut 104 screwed to the connector main body 101. The inner peripheral surface of the connector body 101 has a taper so as to gradually decrease in diameter from left to right in the figure from the opening side to the back, that is, in the axial direction. Has a taper surface having a diameter slightly larger than the taper of the inner periphery of the connector main body 101 in a no-load state. As a result, when the cap nut 104 is screwed into the connector main body 101 and gradually tightened, the gland packing 103 is pushed into the connector main body 101 by the flange 104a of the cap nut 104, and the respective tapered surfaces of the connector main body 101 and the gland packing 103 are formed. The gland packing 103 is compressed due to the difference in the diameter and the degree of inclination of the cable 10, and as a result, the cable 10
5 is tightened and held.

[0003]

In such a connector, it is possible to easily connect and hold a plurality of cables. However, as shown in FIG. The exposed side of the packing 103 tends to deform into an R-shape and the entrance (exposed end) 102a of the through hole 102 tends to be turned up. In such a case, it is difficult to maintain the cable and maintain water tightness. Although there is no serious adverse effect such as failure, water or oil etc. accumulates in the rolled-up gap 102, which is a cause of deterioration of the packing, or that the portion is also a portion that can be exposed from the outside and visible. However, it is easy to cause anxiety about the waterproof appearance (although there is no problem in waterproofing).

Accordingly, in view of the above, it is an object of the present invention to provide a cable connector having a simple structure in which there is no opening in a packing wire even in the case of a multi-core cable and the cable has a high pull-out strength. .

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, a cable connector according to the present invention is provided with a packing having a connector body and a plurality of cable passage holes disposed in the connector body and penetrating in the axial direction. And compression means for compressing the packing in a direction in which the end of the through hole is exposed.

Still further, a cable connector according to the present invention has a connector body, a packing having a plurality of through-holes penetrating in the axial direction, and a tapered surface which is reduced in diameter in the axial direction on an inner periphery thereof. A compression ring for compressing the packing by the tapered surface by inserting the packing and tightening and holding the cable passed through the through hole; and a cap nut screwed with the connector body to hold the compression ring and the packing in the connector body. And characterized in that:

In particular, the packing has a frusto-conical shape having a tapered surface on the outer circumference tapering in the axial direction,
Furthermore, it has a slit that allows the cable to be inserted into the through hole from the outside in the radial direction. The packing is held in the connector body such that the small diameter side faces the cap nut side.

In another aspect according to the present invention, there is provided a hollow connector body having a stepped portion having a reduced diameter on the inner periphery and a threaded portion on the outer periphery, and a through hole for inserting a cable in an axial direction. A packing having a plurality of wire holes and having a tapered surface on the outer periphery which is reduced in diameter in the axial direction; and a taper having an tapered surface on the inner circumference which is reduced in diameter in the axial direction and wherein the taper is formed as the packing is inserted. A compression ring that acts to compress the packing on the surface, and is mounted so as to screw with the screw part of the connector body, and as the screwing progresses, presses the compression ring and packing with its flange and the step of the connector body. And a cap nut acting to push the packing into the compression ring.

[0009]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an assembled view of a cable connector according to the present invention, and FIG. 2 is an exploded view of the connector of FIG. 1 showing respective components of the connector.

The cable connector 1 according to the present invention is roughly divided into a connector body 2 and a gland packing 3 (hereinafter referred to as a packing 3) mounted in the connector body 2.
And a compression ring 4, a cap nut 5 screwed on one side with the connector body 2, a lock nut 6 screwed on the other side, and a seal ring 7.

The individual components will be described in detail. The connector body 2 is a hollow cylindrical body as a whole, and has a large-diameter cylindrical portion 21 for receiving the packing 3 and the compression ring 4 therein, The main body 2 is mounted on a wall plate 8 such as a casing.
(FIG. 1) is composed of a cylindrical portion 22 having a slightly smaller diameter for attachment to the inside, and a step portion 23 having a reduced diameter and protruding inward is formed inside a boundary between the large-diameter cylindrical portion 21 and the small-diameter cylindrical portion 22. Further, external threads 21a and 22a are provided on the outer peripheral surface of the large-diameter cylindrical portion 21 and the outer peripheral surface of the small-diameter cylindrical portion 22, respectively.
Are formed.

The packing 3 disposed in the large-diameter cylindrical portion 21 of the connector main body 2 is made of an elastic packing, for example, rubber, and has a substantially trapezoidal cross section, that is, a truncated conical shape. Consists of The packing 3 is formed with a plurality of through-holes 31 penetrating in the axial direction.
The cable 9 (FIG. 1) can be inserted into the cable 1. The through-holes 31 are, for example, substantially circular holes arranged at substantially equal angular intervals about the axis of the packing 3. Although only two through holes 31 are shown in the figure, a plurality of through holes such as 4, 6, and 8 are formed, and each of the through holes 31 is necessarily a hole having the same diameter. Instead, holes having different diameters according to the diameter of the cable to be inserted may be used.

Each cable hole 31 has a cable 9
The packing 3 is cut from the outer peripheral surface of the packing 3 so as to reach the wiring hole 31 so that the cable 9 can be inserted from the lateral direction, that is, from the radial outside of the packing 3 toward the wiring hole 31. A slit 32 is formed,
The structure is convenient for inserting the cable 9. By compressing the packing 3 into which the cable 9 has been inserted from the outer peripheral side in the radial direction as described later, the cable 9 disposed in the through hole 31 can be tightened to hold the cable 9.

The packing 3 is disposed so that its small diameter side faces the cap nut 5 side, and a step 33 is formed on the outer periphery of its large diameter side, and as shown in FIG. 3 is a stepped portion of the connector body 2 having an end face
3 is arranged in the connector main body 2 so as to be in contact with the end face.

The compression ring 4 for pushing the packing 3 is
The tapered surface 41 having a diameter reduced toward the axial direction is provided on the inner periphery, and the tapered surface 41 is arranged so that the small diameter side faces the cap nut 5 side. The packing 3 is gradually compressed by the tapered surface 41 whose diameter is reduced, and the cables 9 inserted in the respective through holes 31 are tightened and held by the packing 3. For such compression, the gradient of the tapered surface 41 on the inner periphery of the compression ring 4 is formed to be steeper than the gradient of the tapered surface 34 on the outer periphery of the packing 3 and to have a slightly smaller diameter. .

The cap nut 5 has a female screw 51 on the inner circumference for screwing with the male screw 21a on the outer circumference of the connector body 2, and a flange 52 having a reduced diameter and protruding inward at an end thereof.
As the female screw 51 is screwed into the male screw 21 a of the connector body 2 and tightened, the compression ring 4 is pushed in by the flange 52, and the compression ring 4 is connected between the flange 52 and the end face of the step portion 23 of the connector body 2. The packing 3 is pressed against the packing 3 so that the packing 3 is pressed into the compression ring 4. FIG. 1 shows a state immediately before the packing 3 is pushed into the compression ring 4.

With this configuration, when connecting the cable 9 to the connector 1, the cable 9 to be connected is passed through the cap nut 5 from the flange 52 side, and then the compression ring 4 is formed on the side where the tapered surface 41 has a small diameter. Through.
Next, the packing 3 is positioned so that the small-diameter side faces the cap nut 5 side.
Is inserted into the through-hole 31 of the packing, and is inserted through the connector body 2 from the large-diameter cylindrical portion 21 side into the hollow portion, and then the cap nut 5 is screwed into the large-diameter cylindrical portion 21 of the connector body 2. 21a, the flange 52 of the cap nut 5 pushes the compression ring 4 in accordance with the progress of the screwing (tightening), so that the step 33 moves the packing 3 stopped by the step 23 of the connector body 2 to the escape area. It is lost and pushed into the compression ring 4. This insertion is performed smoothly because the load is gradually applied by the action of the tapered surface 41 on the inner periphery of the compression ring 4 and the tapered surface 34 on the outer periphery of the packing 3. The cable inserted into the wire hole 31 is securely fastened and held. Note that such compression by the compression ring 4 acts in a direction to narrow the exposed end (the end on the side of the cap nut 5) of the through hole 31 of the packing 3, thereby causing the packing to be turned up as in a conventional connector. Do not let.

On the other hand, a wall plate 8 such as a casing to which the connector main body 2 is to be mounted has a mounting hole 81 having a diameter slightly larger than the outer diameter of the small diameter cylindrical portion 22 of the connector main body 2. Is inserted into the mounting hole 81 from one side of the wall 8 and is mounted so that its tip protrudes to the other side of the wall 8, and the lock nut 6 is screwed into the male screw portion 22 a of the protruding small-diameter cylindrical portion 22. Combined
By tightening this, the connector main body 2 is fixed to the wall 8. Note that a seal ring 7 is mounted in an annular groove 24 at the step end surface formed on the outer periphery of the small-diameter cylindrical portion 22 of the connector main body 2, and when the connector main body 2 is mounted on a wall plate 8 such as a casing. It acts to maintain water tightness between the two.

[0019]

As described above, according to the cable connector of the present invention, the opening of the through hole of the packing, which causes the accumulation of water or oil, as seen in the conventional connector, is formed. In addition, since the entire area of the through hole of the packing is in close contact with the cable, the pull-out strength of the cable can be further enhanced, and the visual anxiety of water tightness can be eliminated. Further, in connecting the cable, the gasket has an advantage that the cable can be easily inserted into the gasket by providing the gasket with a slit connected to the insertion hole from the outer peripheral surface thereof.

[Brief description of the drawings]

FIG. 1 is a set view of a cable connector according to the present invention.

FIG. 2 is an exploded view of the connector of FIG.

FIG. 3 is a diagram showing an example of a conventional cable connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable connector 2 Connector body 3 Packing 4 Compression ring 5 Cap nut 6 Lock nut 7 Seal ring 23 Step 33 Step 34 Tapered surface 41 Tapered surface 52 Flange

Claims (6)

[Claims] A packing having a connector main body, a plurality of cable through-holes disposed in the connector main body and penetrating in an axial direction, and compressing the packing in a direction to narrow an exposed end of the through-hole. And a compression means. 2. A connector having a connector body, a packing having a plurality of through holes penetrating in an axial direction, and a taper surface which is reduced in diameter in an axial direction on an inner periphery, and the taper is inserted by inserting the packing. A compression ring that compresses the packing on the surface and tightens and holds the cable that has passed through the through hole; and a cap nut that is screwed with the connector body and holds the compression ring and the packing in the connector body. Cable connector. 3. The cable connector according to claim 2, wherein the packing has a truncated conical shape having a tapered surface on an outer circumference tapering in an axial direction. 4. The cable connector according to claim 2, wherein the packing has a slit through which the cable can be inserted into the through hole from the outside in the radial direction. 5. The cable connector according to claim 3, wherein the packing is held in the connector body such that the small diameter side faces the cap nut side. 6. A hollow connector body having a stepped portion with a reduced diameter on the inner periphery and having a threaded portion on the outer periphery, and a plurality of through holes for inserting a cable in the axial direction and extending in the axial direction. A packing having a tapered surface on the outer circumference that decreases in diameter,
A compression ring that has a tapered surface on the inner periphery that decreases in diameter in the axial direction and that acts to compress the packing with the tapered surface as the packing is inserted; And a cap nut that acts to push the compression ring and the packing by the flange and the step portion of the connector body as the screwing progresses and to push the packing into the compression ring. Connector for cable.