JPH0312014Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cable connection case used, for example, at the connection part of a gas-filled cable filled with pressurized gas.

[Conventional technology]

In cables that undergo gas maintenance, air or nitrogen gas of 1 kg/cm ² or less is sealed inside the cable, so it is necessary to prevent gas leakage from the connections. For this reason, conventionally, various cable connection cases have been used for airtightly sealing the connection parts of these cables.

Figures 3 and 4 show an example of the conventional cable connection box of this type, which was previously proposed by the present applicant in Utility Application No. 1983-44763, and the reference numeral in the figure Reference numeral 1 designates a cable on one side whose conducting wires are connected to the other cable (not shown) on the right side of FIG. 3, and which are integrally connected by a connecting fitting 2. A pair of cables 1 connected in this way
On the outer periphery of each, end plates 3 (the one disposed on the outer periphery of the other cable is not shown) are arranged to face each other.

This end plate 3 is a disk-shaped half body 4 made of an elastic material with a large amount of deformation such as rubber, which is integrally joined with the outer periphery of the cable 1 in between. It is something. Here, on both end surfaces of the half-split bodies 4, 4 constituting the end plate 3, half-split cylindrical thick-walled portions 5 are formed which extend outwardly along the axial direction. . Bolt attachment portions 6 that bulge outward in the radial direction are formed in portions of these thick portions 5 that face each other with the cable 1 in between. On the other hand, a cable insertion hole 7 having an inner diameter slightly larger than the outer diameter of the cable 1 is bored in the center of the end plate 3 made up of the half bodies 4, 4 along the axial direction. And this cable insertion hole 7
A sealing material enclosing portion 8 is provided at the center of the inner peripheral portion of the sealing material, which is formed by a plurality of annular grooves (three in the figure) that communicate with each other along the circumferential direction. Furthermore, annular grooves 9, 9 each having a U-shaped cross section are formed on both sides of the sealing material enclosing portion 8 of the cable insertion hole 7. A viscoelastic sealing material 10 such as unvulcanized rubber is sealed in the sealing material enclosing portion 8 of the end plate 3 to airtightly seal the space between the end plate 3 and the cable 1. Furthermore, sealing washers 11, 11 made of rubber, plastic, etc. are provided in the grooves 9, 9, respectively, to prevent the sealing material 10 from flowing out.
is included. The halves 4, 4 of the end plate 3 are integrally tightened by bolts 12, 12 inserted between the bolt attachment portions 6. Here, between the bolt attachment part 6 and the bolt 12, the bolt is attached across the outer periphery of the thick part 5 of the end plate 3 and the bolt attachment part 6, and the tightening force of the bolt 12 is applied to the end plate 3. A metal plate 13 is attached for uniform transmission. Furthermore, arc-shaped deep grooves 3a are formed on the end face of the end plate 3 on the cable connection side side, which are deeply cut inward from the end face along the axial direction.
Further, an annular recess 14 is formed along the circumferential direction on the outer periphery of the end plate 3.
A sealing material 15 having adhesive properties, such as an unwashed rubber tape, is wound inside the sealing member 4 . A casing 16 is airtightly provided around the outer periphery of this end plate 3 with the seal 15 material interposed therebetween.

This casing 16 has a substantially cylindrical appearance,
Half bodies 17, 17 divided into two equal parts along the axial direction
are integrally connected by bolts 18, 18 and nuts 19, 19. here,
At both ends of the casing 16 and at positions slightly longer than the thickness of the end plate 3 along the axial direction from both ends, there are annular steps protruding radially inward, respectively. portions 20, 20 are formed. And the casing 16
is bridged between these end plates 3 with the cable 1 sandwiched therebetween, with the outer peripheral portion of the end plate 3 being housed between the stepped portions 20, 20.

According to the conventional cable connection case having the above structure, when a maintenance gas such as air or nitrogen gas is pressurized and sealed inside the cable 1, the outer skin is peeled off and the connection portion is exposed. Through this, the inside of the casing 16 is also pressurized to the same pressure as the inside of the cable 1. Then, the pressurized gas in the casing 16 acts to expand the deep grooves 3a of the end plate 3 from within, and the end plate 3 expands toward the outer and inner circumferences. Therefore, the inner and outer peripheries of the end plate 3 are covered with sealing materials 10 and 15, respectively.
The cable 1 and the casing 16 are tightly attached to each other with the cable 1 interposed therebetween, thereby keeping the inside of the casing 16 airtight.

[Problem that the invention attempts to solve]

However, in the conventional cable connection case described above, since the half bodies 4, 4 constituting the end plate 3 are fastened to each other by the bolts 12, 12, the thick wall portion 5 inevitably It is necessary to form bolt attachment portions 6 in which the bolts 12, 12 are inserted. Therefore, when the outer diameter of the cable 1 increases, the bolt attachment portion 6 of the thick wall portion 5 also protrudes in the radial direction of the end plate 3 and comes close to the stepped portion 20 of the casing 16. , 12, etc., the disadvantage is that these operations become difficult. Moreover, when the outer diameter of the cable 1 becomes even larger, the bolt attachment portion 6
Since the end plate 3 and the casing 16 interfere with each other, it was necessary to replace not only the end plate 3 but also the casing 16 with a larger diameter one. For this reason, the outer diameter of the casing 16 gradually increases in proportion to the outer diameter of the cable 1, which leads to an increase in the size of the entire cable connection box, and for each outer diameter of the cable 1. Since it is necessary to prepare component parts with corresponding dimensions, there is a problem in that the number of parts increases.

[Purpose of invention]

This idea was made in view of the above circumstances,
It is an object of the present invention to provide a cable connection case that is easy to handle and allows a common casing to be used for cables of multiple outer diameters, thereby reducing the size and number of parts. This is the purpose.

[Means for solving problems]

The cable connection box of this invention has end plates made of a pair of half-split bodies facing each other and sandwiching the cables between each other, arranged on the outer periphery of a pair of cables that sandwich the connection point therebetween, A fixing plate is provided on the side surface of these end plates, and the end plate and the fixing plate are integrally sandwiched and supported by receiving grooves formed at both ends of a cylindrical casing that covers the connection point of the cable, Further, a sealing member is interposed between the casing and the outer circumferential portion of the end plate, and between the inner circumferential portion of the end plate and the cable to airtightly seal the space between them.

[Effect]

In the cable connection case configured as described above, since each end plate is supported by the receiving groove of the casing via the fixing plate, bolts are not required for attaching the end plate. Further, since there is no need to form a bolt attachment part in the thick part of the end plate, there is no interference between the thick part and the stepped part of the casing even if the outer diameter of the cable becomes somewhat large. This allows the use of a common casing for cables of multiple outer diameters.

〔Example〕

Figures 1 and 2 show an example of the cable connection box of this invention, and Figures 3 and 4 show an example of the cable connection box of this invention.
Portions common to those shown in the figures are given the same reference numerals and their explanations will be omitted.

In FIGS. 1 and 2, in this case for cable connection, bolts 12, 12 are not used in assembling the half bodies 4, 4 constituting the end plate 3, and therefore the above-mentioned The thick portion 5 of the half body 4 is not formed with the bolt attachment portion 6 that bulges out in the radial direction. On the other hand, on both sides 24, 24 in the axial direction of each half body 4 of this end plate 3,
Fixing plates 25, 25 are provided so as to sandwich the half body 4 therebetween.

The fixing plate 25 includes an arc-shaped band plate portion 26 that covers the outer periphery of the thick wall portion 5 of the half-split body 4, and a half-ring plate-shaped flat plate portion 27 that covers the outer periphery of the end surface 24 of the end plate 3. It is formed by joining together from materials such as hard plastic or metal. And, the flat plate portion 27 of these fixed plates 25, 25,
27 and the outer periphery of the half body 4 sandwiched between the fixing plates 25, 25 are the stepped portions 28, 27 of the casing 16,
It is integrally held and supported by a receiving groove 29 of the casing 16 constituted by 28.

That is, the stepped portions 28, 2 of this casing 16
The width of the receiving groove 29 formed by the casings 8 is slightly larger than the overall width of the half body 4 and the fixing plates 25, 25, and when assembling the casings 16, 16. The half body 4 and the fixed plates 25, 25 are inserted into this receiving groove 29. When the casings 16, 16 are tightened with the bolts 18, 18, the fixed plate 25 is sandwiched between the half body 4 and the stepped portion 28, or the outer peripheral portion thereof is
is pushed toward the cable 1 side by the inner peripheral surface of the receiving groove 18. As a result, the half bodies 4, 4 of the end plate 3 are also pressed toward the cable 1 side.

Therefore, in the case of such a cable connection box, the half body 4 of each end plate 3 is attached to the fixing plates 25, 2.
In addition, in order to support these integrally by sandwiching them between the receiving grooves of the casing 1, the end plate 3
No bolts are required for installation. Therefore, assembly and disassembly of the half bodies 4, 4 constituting the end plate 3 can be performed extremely easily. Moreover, since it is no longer necessary to form the bolt attachment part 6 on the thick wall part 5 of the end plate 3, even if the outer diameter of the cable 1 becomes somewhat large, the bolt attachment part 6 does not need to be formed on the thick wall part 5 of the end plate 3. Casing 1
The step portions 20 of No. 6 do not interfere with each other. Therefore, a common casing 16 can be used for cables 1 having a plurality of cables 1 having slightly different outer diameters. As a result, it is possible to reduce the size of the entire cable connection case, and it is also possible to further reduce the number of component parts.

[Effect of idea]

As explained above, in the cable connection case of this invention, end plates consisting of a pair of half-pieces, which are opposite to each other and which sandwich the cables between them, are placed on the outer periphery of a pair of cables that sandwich the connection point between them. A fixing plate is provided on the side surface of these end plates, and the end plate and the fixing plate are integrally sandwiched by receiving grooves formed at both ends of a cylindrical casing that covers the connection point of the cable. Further, a sealing member is interposed between the casing and the outer circumferential portion of the end plate, and between the inner circumferential portion of the end plate and the cable to airtightly seal the space between them. Therefore, according to this cable connection case, it is easy to handle because no bolts are required to attach the end plate, and even if the outer diameter of the cable is slightly different, the thick part of the end plate can be attached to the casing step. Therefore, a common casing can be used for cables with a plurality of outer diameters by simply replacing the end plate. Therefore, it is possible to achieve both a reduction in size and weight as a whole and a reduction in the number of component parts.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the cable connection case of this invention. Figure 1 is a side sectional view of the main part, Figure 2 is a - line view of Figure 1, and Figure 2 is a side sectional view of the main part. 3
4 and 4 show a conventional cable connection case, FIG. 3 is a side sectional view of the main part, and FIG. 4 is a view taken along the line - - of FIG. 3. 1... Cable, 3... End plate, 4, 17...
Half body, 5... Thick wall part, 6... Bolt mounting part, 1
0, 15... Sealing material, 11... Sealing washer, 12... Bolt, 13... Metal plate, 16
...Casing, 20, 28, 30...Step part, 2
4...End face, 25...Fixing plate, 26...Strip plate portion, 27...Flat plate portion, 29, 32...Receiving groove,
31... Clamping bolt.

Claims (1)

[Scope of utility model registration request] An end plate consisting of a pair of half-split bodies each disposed on the outer periphery of a pair of cables with a connection point sandwiched therebetween and facing each other and sandwiching the cable between them, and an end plate provided on the end face of these end plates. a fixing plate; a cylindrical casing that covers the connection point of the cable; and a receiving groove formed at both ends of the casing for integrally holding the end plate and the fixing plate and supporting the end plate; and the casing. and a sealing member interposed between the outer periphery of the end plate, the inner periphery of the end plate, and the cable to airtightly seal the space between them. Box for use.