JPS5923165B2 - Cable entry section - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in cable inserts for protecting cables and providing fixed connections to other cables or equipment.

The cable insertion part has a structure in which the cable is tightly passed through the center hole of a bead-shaped elastic stress cone made of hard rubber, and is pressed and fixed with members on both sides having conical surfaces that match the conical surfaces on both sides of the elastic stress cone. It has been commonly used in the past because it is easy to assemble and can be disassembled.

However, in the cable insertion portion, both sides of the elastic stress cone are in close contact with the mating member, making it difficult to separate when disassembling the cable.

Further, if a tool or the like is used to pull out the cable, the cable or the connecting member such as the elastic stress cone is likely to be damaged, which may make it impossible to reuse the member.

An object of the present invention is to provide a cable insertion part that enables disassembly and reuse without damaging cables and cable insertion fixing members. The purpose of this invention is to provide a gap and reduce or pressurize this gap during disassembly to facilitate separation of the insertion member.

FIG. 1 is a sectional view of a cable insertion portion according to an embodiment of the present invention.

The insulating molded body 1 attached to other equipment, etc. is a hard tubular member made of, for example, epoxy resin, and a cable 2 is inserted into its center hole, and an elastic stress cone 3 with the cable 2 passed through it closely. It has an end surface that coincides with the conical surface of.

The side surface parallel to the axis of the elastic stress cone 3 is also the insulating molded body 1
The elastic stress cone 3 is surrounded by the insulating molded body 1 except for the right conical surface.

Therefore, the elastic stress cone 3 made of hard rubber material
When a pressing force is applied from the right side for a long period of time, the elastic stress cone 3 and the insulating molded body 1 come into close contact, making it difficult to pull out during disassembly.

On the other hand, a suppression fitting 4 is attached to the right conical surface of the elastic stress cone.
are in contact with each other, and this pressing fitting 4 is pressed toward the elastic stress cone 3 by the next pressing mechanism.

A plurality of compression springs 7, one end of which is in contact with the press fitting 4, are connected to the seat plate 9.
The seat plate 9 is inserted into a plurality of shaft rods 8 which are set up in the insulating molded body 1, and the seat plate 9 is locked to a stepped portion on the inner surface of a protection tube 10 which is fixedly connected to the insulating molded body 1 with a plurality of screws 9.

Therefore, the pressing fitting 4 was pressed against the elastic stress cone 3 by the compression spring 7, and after a long period of time, the two came into close contact, making disassembly difficult.

The above structure is the same as that of a conventional cable insertion section.

The feature of this embodiment is that, as described above, a cavity 5 is provided at the center of the conical surface of the pressing fitting 4 that contacts the elastic stress cone 4, and a communication port 6 communicating with this cavity 5 is provided on the side surface of the pressing fitting 4. That's true.

When disassembling this cable insertion part, first screw 1
1 is removed to separate the protective tube 10, and the communication port 6 is connected to a vacuum pump to bring the cavity 5 into a reduced pressure state.

Next, by fixing the insulating molded body 1 and grasping the suppressing fitting 4 and pulling it out, the insulating molded body 1 and the elastic stress cone 3 are separated.

Finally, if pressurized fluid is introduced through the communication port 6, the elastic stress cone 3 and the pressing fitting 4 can be easily separated.

As described above, the cable insertion part of the present embodiment has a space in the pressing fitting 4 and a communication port that communicates with the space.
This has the effect of making it easier to disassemble the components and also allowing for reuse without damaging the components.

In the embodiment shown in FIG. 1, four parts are provided at the center of the conical surface of the pressing fitting 4, and these recesses are formed on the surface of the elastic stress cone 3 that contacts the pressing fitting 4. It may be provided on the contact surface of both the elastic stress cone 3 and the press fitting 4.

Also, when assembling the cable insertion part, the communication port 6 is sealed after the gap 5 is evacuated to increase the adhesion between the elastic stress cone 3 and the press fitting 4, and when the two are separated, the vacuum is It is also effective to break it.

Furthermore, if it is extremely difficult to separate the insulating molded body 1 and the elastic stress cone 3, an adhesive may be injected into the gap 5 to increase the adhesion between the elastic stress cone 3 and the press fitting 4. The void portion 5 can have various effects, such as being able to utilize the space.

The cable insertion part of the present invention has the effect that by gripping and pulling out the pressing fitting, the cable and other members used in the cable insertion part can be disassembled without damaging them.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a cable insertion portion according to an embodiment of the present invention. In the figure, 1 is an insulating molded body, 2 is a cable, 3 is an elastic stress cone, 4 is a press fitting, 5 is a cavity, 6 is a communication port, and 10 is a protective tube.

Claims (1)

[Claims] 1. A tubular insulating molded body having a conical end surface that expands outward into which a cable is inserted into a central hole, and a centrally penetrating tube having a conical surface that matches the conical end surface of the insulating molded body. A bead-shaped elastic stress cone with the cable passed through the hole closely, an annular suppressing fitting having a conical surface that matches a conical surface on a side different from the conical surface of the elastic stress cone, and this suppressing fitting. In the cable insertion portion, the cable insertion portion includes a suppression mechanism that presses toward the elastic stress cone, a suppression fitting fixed to an end face of the insulating molded body, and a protective tube that fixes the suppression mechanism and surrounds the cable. A cable insertion part characterized in that an airtight gap having a communication port in the metal fitting is provided between the pressing metal fitting and the elastic stress cone. 2. The cable insertion portion according to claim 1, wherein the void portion is a void provided in at least one of the suppression fitting or the elastic stress cone.