JPS58172913A - Terminal metal for wire sheathed cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal fitting for a cable sheathed with wire.

The terminal fitting shown in FIG. 2, which is armored with a wire, is known to have the structure shown in FIG. 1.

In the figure, 10 is a main body, 12 is a tapered collar, and a tapered surface 12a is formed on one outer peripheral portion of the collar. Reference numeral 14 denotes a crumbling ring, and a tapered surface 14a is formed on the inner circumferential surface of the crumbling ring. 16 is a union nut, 18 degrees 20 is a rubber backing, and 22 is a ground.

The main body 10, the taper collar 12, the crumbling 1
4, the union nut 16 and the gland 22 are made of steel.

In the above-described configuration, in order to fix the cable 6 to the box 8, first screw the outer peripheral part of the main body 10 into the screw hole Ejb of the cord arrangement opening 8a of the box 8, and fix the main body 10 to the box 8.

Next, the rubber packing 18 and the tapered collar 12 are inserted into the enlarged diameter part of the inner diameter part of the main body 10. At this time, the operator presses the tapered collar 12 against the main body 10 by hand so that the taper collar 12 does not come off the main body 10 and fall due to its own weight. On the other hand, a special tool is used to cut the outer tube 6a of the cable 6 at a predetermined distance from one end of the cable 6 to expose the wire 24, and cut the wire 24 to a predetermined length. Furthermore,
The inner tube 6b is cut at a position a predetermined distance from one end of the cable 6 to expose the core member 28 containing the copper wire 26 inside the inner tube 6b. Next, the gland 22 in which the rubber backing 20 is placed is loosely fitted onto the cable 6 from the tip thereof, and then the union nut 16 and the clamp ring 14 are loosely fitted onto the cable 6. Next, connect the cable 6 to the tapered collar 12 and the main body 10.
, and one end of the cable 6 is positioned within the box 8.

Next, the wire 24 is connected to the tapered surface 12 of the tapered collar 12.
Place it in opposition to a. Next, the union nut 16 is screwed into the thread formed on the outer periphery of the main body 10, thereby connecting the tapered surface 14a of the clamp ring 14 and the tapered collar 1.
The wire 24 is clamped and fixed with the tapered surface 12a of No. 2.

At this time, the tip of the tapered collar 12 suppresses and deforms the rubber backing 18, and the rubber backing 18 comes into close contact with the outer peripheral surface of the inner tube 6b of the cable. Next, the gland 22 is compressed and deformed by the end surface of the thread on the outer periphery of the union nut 16, and the rubber backing 20 is brought into close contact with the outer periphery of the external tube 6a of the cable. By the above operations, the cable 6 is fixed to the box 8 via the terminal fitting. The copper wire 26 of the cable 6 is connected to a terminal or the like in the box 8.

As is clear from the above description, the pressing force of the clamp ring 14 causes the wire 24 to be tightly fixed to the tapered surface 12a of the tapered collar 12 and the backing 18
The tightening operation for the inner tube 6b is performed.

Therefore, the tapered surface of the clamp ring 14
When pressed against the tapered surface of the tapered collar 12 through the taper surface, the collar 12 receives this pressing force,
Due to the elasticity of the clamping ring 18, it moves slightly in the direction of escaping from this pressing force, so the clamping ring 1
However, there were drawbacks in that the pressure force applied to the wire 24 by the tapered surface of the clamp ring 14 was weak, and the wire 24 could not be strongly clamped and fixed between the clamp ring 14 and the taper collar 12.

In addition, since the taper collar 12 is configured separately from the main body 1O, when the cable 6 is fixed to the box 8, the taper collar 12 is prevented from coming off the main body 10 and falling due to its own weight as described above. The cable 6 must be supported by hand, which makes the operation of fixing the cable 6 extremely cumbersome. Furthermore, in order to bring the wire 24 into close contact with the tapered surfaces of the tapered collar 12 and the clamp ring 14, the parallelism and opposing distance between the tapered surface 12a of the tapered collar 12 and the tapered surface 14a of the clamp ring 14 must be set with high precision. Must therefore S ear 2
There was a drawback in that even if the thickness of the clamp ring 4 was slightly different, the clamp ring 14 and collar 12 had to be replaced with corresponding ones. Further, since the clamp ring 14 is a rigid body, the tapered surface 14a of the ring and the wire 24 come into line contact, which has the disadvantage that the frictional force between them cannot be sufficiently increased.

An object of the present invention is to provide a terminal fitting that eliminates all of the above-mentioned defects.

The structure of the present invention will be explained in detail below based on the embodiments shown in FIG. 2 and below.

30 is a tubular main body, and a mounting screw 32 is formed on the outer periphery of one end of the main body.

Reference numeral 34 denotes a flange formed on the outer periphery of the main body 30, and the outer shape of the flange is set in a hexagonal shape corresponding to the hexagonal hole of the rotary tool. A circumferential groove is formed on one side of the flange portion 34, and a rubber O-ring 36 is disposed in the circumferential groove. 38 is a screw formed on the outer periphery of the main body 3o;
A rubber 01J7 gug 40 is fitted onto the outer peripheral surface of the main body 30 and positioned between one end of the screw 38 and the side surface of the protrusion 34a integrally formed on the flange 34. There is.

Reference numeral 42 denotes a tapered surface formed on the outer peripheral surface within a predetermined range from the other end of the main body 30. Due to the tapered surface 42, the outer diameter of the main body 30 increases from the other end of the main body 30 toward one end of the main body 30. The diameter is expanded at a predetermined slope. The portion of the main body 30 where the tapered surface 42 is formed constitutes a tapered collar. 44 is a union nut, and a female thread 46 is formed on one of the inner diameter portions of the union nut. A stopper surface 48 is formed on one of the protrusions 44a formed on the inner diameter portion of the union nut 44 and spaced from the other end of the screw 38 by a predetermined distance. A tapered surface 50 is formed on the other side of the protrusion 44a to expand the diameter of the inner diameter portion of the union nut 44 toward the other end. A female thread 52 is formed on the other inner diameter portion of the union nut 44 . Reference numeral 54 denotes a clamp ring whose outer diameter is set to be slidably fitted onto the inner circumferential surface of the union nut 44, and is composed of a copper ring and a lead ring 54a press-fitted therein. Reference numeral 56 denotes a coupling, 58 a washer, and 60 a ground, which has a hexagonal flange and a screw formed on the outer periphery.
0, the union nut 44 and the gland 60 are made of steel.

Next, the operation of this embodiment will be explained.

First, with the 01J rings 36 and 40 fitted into the main body 30, the screws 32 of the main body 30 are screwed into the screw holes of the connection box 8 of a terminal box or other electrical equipment, and the main body 30 is fixed to the box 8. Next, ground 60, waratsuya-58, backing 56
, union nut 44, and clamp ring 54 are loosely fitted into the cable 6 shown in FIG. 2 from its left end in this order.

Next, the cable 6 is inserted into the main body 30 and the wire 24
are arranged opposite to the tapered surface 42 of the main body 30. Next, the union nut 44 is screwed into the screw 38 of the main body 30. At this time, the clamp ring 54 is attached to the union nut 4
The lead ring 54a of the clamp ring 54 is pushed toward the left in FIG. 3 by the stopper surface 48 of the wire 2.
4, and the wire 24 is in pressure contact with the tapered surface 4 of the main body 30.
2 and the inner diameter portion of the lead ring 54a. The inner diameter part of the lead ring 54a' is deformed by the pressure contact force with the wire 24, and due to this deformation, the wire 24 comes into surface contact with a part of the inner diameter part of the lead ring 54a, and the wire 24 comes into contact with the tapered surface 42 and the lead ring 54a. When the union nut 44 is firmly fixed in between, the screwing and rotation operation of the union nut 44 is stopped. Thereby, the cable 6 is fixed to the terminal box via the wire 24 and the main body 30.

Next, the screw of the gland 60 is screwed into the female thread 52 of the union nut 44, and the backing 56 is pressed against the tapered surface 50 of the union nut 44 via the washer 58. The backing 56 has a ground pressure of 6° and a tapered surface of 5°.
The inner diameter portion of the backing 56 is deformed in the diametrical direction due to the interaction with the locking action of the outer tube 6a of the Kehepuru 6.
Crimp the outer circumferential surface of the

Since the present invention is constructed as described above, it has the following effects.

(1) Since the chipar surface 42 is integrally formed with the main body 30, the tapered surface 42 does not escape against the pressing force from the clamp ring 54, and the wire 24 is firmly attached to the tapered surface 42 by the clamp ring 54. It can be crimped.

(2) Since the clamp/pull ring 54 is configured with the lead ring 54a, the lead ring 54 is attached to the cable wire 24.
By strongly crimping the wire 24, the lead ring 54a and the wire 24 can be brought into surface contact, and the frictional force between them can be increased. The tapered surface 4 does not require high precision parallelism with the inner diameter of the
The wire 24 of the cable can be firmly clamped and fixed between the lead ring 54a and the inner diameter portion of the lead ring 54a.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the conventional scheme, Fig. 2 is a side view of a cable armored with wire, Fig. 3 is a partially cutaway side view showing an embodiment of the present invention, and Fig. 4 is a rear view of the same. It is. 30...Main body, 32...e screw, 34...Armor part, 3
6...0 ring, 38...Thread, 40...0 ring, 42...Tapered surface, 44...Union nut, 46...Female thread, 481・e stopper surface, 50・
...Tapered surface, 54...Clamp ring, 54a.
...Lead ring, 60, working, ground.

Claims (1)

[Claims] 1 It is formed into a rotatable shape by a rotary tool, and a screw Okawa screw 32 is formed on one side, and a tapered surface 42 is formed on the other side, and a nut screw 38 is formed between the tapered surface 42 and the screw 32. tubular body 30
, a clamp ring 54 in which a lead ring 54a is press-fitted into a rigid ring, an inner peripheral surface into which the clamp ring 54 can be slidably fitted, and a stopper surface 48 perpendicular to the axial direction of the inner peripheral surface. A tubular union nut 4 having a screw 46 that can be screwed into the nut screw 38 of the main body 30 formed on one side of the inner diameter portion and a gland screw 52 formed on the other side.
4, and a gland 60 formed with a screw that can be screwed into the gland screw 52.