JPH0721065Y2 - Closure airtight structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a closure airtight structure for protecting a connecting portion of a cable in an airtight state.

"Prior Art" Conventionally, there is known a closure that accommodates two connecting portions as shown in FIG.

This closure is a sleeve 3 which is entirely formed in a tubular shape and in which the connecting portion 2.2 of the cable 1.1 is housed.
.3 and a synthetic rubber (vulcanized rubber) having a through hole 5/5 .., which is arranged at an end portion of these sleeves 3 and 3, in which the main body 4. End plate 6
・ 6 and 6 are provided, and these sleeves 3 ・
3 and the end face plates 6 and 6 are filled in the storage space 7 with an inert gas, and the connecting portions 2 and 2 of the cables 1 and 1 are arranged in an airtight state isolated from the outside. It is like this.

By the way, in the closure as described above, when only one connecting portion 2 of the cable 1 is to be housed, it is necessary to keep the housing space 7 airtight. Therefore, as shown in FIG. The through holes 5, 5 which are not inserted in the main bodies 4, 4, ... Are closed by a closing plug 8.8 made of synthetic rubber (vulcanized rubber).

As shown in FIGS. 5 and 6, the plug 8 has convex portions 8A, 8A formed at its end portion that engage with the concave portions 6A, 6A of the end face plate 6, and The outer peripheral surface of the closure plug 8,
Between the inner peripheral surface of the end face plate 6 forming the through hole 5 and a non-vulcanized rubber having a high viscosity, the blocking plug 8 is placed in the through hole 5 of the end face plate 6, A sealing tape 9 for tightly attaching the closing plug 8 to the end plate 6 is wound.

[Problems to be Solved by the Invention] By the way, according to the closure airtight structure configured as described above, since the end face plate 6 or the closure plug 8 is made of synthetic rubber, the overall shape is maintained with a certain strength. In order to hold it, it is necessary to increase the size of the end plate 6 or the closing plug 8, which causes a problem that the weight of the whole is increased and the handling becomes troublesome.

In addition, the closing plug 8 is formed with projections 8A and 8A that directly engage with the recesses 6A and 6A of the end face plate 6, and is formed so as to fit according to the diameter of the through hole 5. Therefore, if the diameter of the through hole 5 is different, the through hole 5 must be newly manufactured, which leads to an increase in cost.

The present invention has been made in view of the above circumstances, and provides a closure airtight structure in which the weight of the entire body is reduced and the closure plug can be used regardless of the diameter of the through hole formed in the end plate. It is intended.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the present invention, a sleeve having a tubular shape as a whole, in which a cable connection portion is housed, and an end portion of these sleeves are arranged. A closure configured to have a plurality of through holes through which the main body of the cable is inserted, and the sleeve and the end face plate to arrange the connecting portion of the cable isolated from the outside. , The end plate is made of plastic, and a plastic plug for closing the through hole is detachably provided in the through hole of the end plate where the cable is not inserted, and the through hole is formed. A rubber tape for adjusting the diameter of the closing plug is wound between the inner peripheral surface of the end plate and the outer peripheral surface of the closing plug, and further, the closing plug has a through hole between the end plate and the closing plug. Along the central axis Therefore, a fixing member for restricting the movement is provided.

[Operation] According to the present invention, by forming the end plate or the closing plug from plastic, for example, the end plate can be thinned, and the end plate and the closing plug can be lightened.

Further, since the diameter of the plug can be adjusted by the rubber tape wound between the inner peripheral surface of the end face plate forming the through hole and the outer peripheral surface of the plug, the plug can be inserted into the through hole. Can be used regardless of the diameter.

Further, since the fixing member for restricting the movement of the closing plug along the central axis of the through hole is provided between the end face plate and the closing plug, even if the pressure of the inert gas is applied. The obstruction plug does not move.

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIG. 1 and FIG.

In these drawings, reference numerals 10 and 11 respectively represent the end face plate 6 and the end face plate corresponding to the closing plug 8 and the closing plug described in "Prior Art". In the following description, the same components as those of the conventional technique are designated by the same reference numerals to simplify the description.

The end face plate 10 is formed of a plastic having a certain rigidity such as a thermoplastic resin containing short fibers or a plastic containing a reinforcing filler, and has an inner side through which a through hole 13 for inserting the body 4 of the cable 1 is inserted. An outer cylinder 10B supported by the sleeve 3 is arranged on the outer side of the cylinder 10A, and a flange portion 10C as a connecting member formed thinly between the inner cylinder 10A and the outer cylinder 10B. 10C ... are arranged.

The end face plate 10 is formed by fastening members such as bolts and nuts 10D and 10D as shown in FIG. is there.

The blocking plug 11 is made of the same plastic as the end plate 10 and has a recess 11A formed at one end thereof to be engaged with a pin described later.

As shown in FIG. 1, between the outer peripheral surface of the block plug 11 and the inner peripheral surface of the end plate 10 in a state where the block plug 11 is arranged in the through hole 13 of the end plate 10. The synthetic rubber tape 14 and the sealing tape 15 are sequentially arranged in a laminated state. The synthetic rubber tape 14 is a band-shaped body formed of vulcanized rubber, and by winding the synthetic rubber tape 14 around the outer peripheral surface of the closure plug 11 in a predetermined manner, the diameter of the closure plug 10 is approximated to the diameter of the through hole 13. is there.

The sealing tape 15 is a belt-shaped body made of high-viscosity unvulcanized rubber, and is formed by the end face plate 10 and the sleeve 1 by closely contacting the synthetic rubber tape 14 and the end face plate 10, The storage space 7 in which the first connecting portion 2 is stored is hermetically sealed in an inert gas filled state.

On the other hand, the inner cylinder 10A of the end face plate 10 is formed with holes 10E (a plurality of holes are provided (not shown)) at regular intervals. These holes 10E are provided with pins 16 (fixing members) which are engaged with the recesses 11A of the closure plug 11, and the internal pressure of the inert gas sealed in the storage space 7 acts on the pins 16 by the pins 16. Then, the obstruction plug 11 moves in the axial direction (arrow A
The movement in the (-B direction) is restricted.

As described above, according to the closure airtight structure shown in the present embodiment, the end face plate 10 or the closure plug 11 is made of plastic, for example, the flange portion 10 of the end face plate 10.
C can be thinned, and the end face plate 10 and the closure plug 11
Each of them can be made lighter, and the whole can be made lighter. Further, since the diameter of the closing plug 11 can be adjusted by the synthetic rubber tape 14 wound between the inner peripheral surface of the end face plate 10 forming the through hole 13 and the outer peripheral surface of the closing plug 11, the closing plug can be adjusted. 11 can be used irrespective of the diameter of the through hole 13, that is, it is not necessary to use a special closing plug 11 according to the diameter of the through hole 13, whereby the versatility of the closing plug 11 is expanded and the cost is reduced. The effect that can be obtained is obtained.

Further, since the pin 16 for restricting the movement of the plug in the direction of arrow AB is attached between the end face plate 10 and the plug 11, the pressure of the inert gas filled from the inside is applied. Even if it does, the obstruction plug 11 will not be displaced, so that the airtight state inside the sleeve is stably maintained, and the connection portion 2 of the cable 1 is protected for a long period of time.

In the airtight structure of the closure described above, the closure plug 11
The two through-holes 13 and 13 through which the main body 4 of the cable 1 is not inserted are closed by 11, but the present invention is not limited to this, and the branch portion where one cable 1 branches into two is stored in this closure. Then, only one through hole 13 through which the main body 4 of the cable 1 is not inserted may be closed by the closing plug 11.

Further, although the cable 1 is arranged on a substantially straight line via the connecting portion 2, the present invention is not limited to this, and the connecting portion 2 may be a terminal end and folded back. In this case, the body 4 of the cable 1 is inserted into the through holes 13 formed in the end plate 10 on the one side, but the main body 4 of the cable 1 is formed on the end plate 10 on the other side. Blocking plugs 11 and 11 are inserted into the through holes 13 and 13, respectively.

[Advantage of Invention] As described in detail above, according to this invention, by forming the end plate or the closure plug from plastic,
For example, the end face plate can be made thin and the overall weight can be reduced.

Further, since the diameter of the plug can be adjusted by the rubber tape wound between the inner peripheral surface of the end face plate forming the through hole and the outer peripheral surface of the plug, the plug can be inserted into the through hole. Can be used irrespective of the diameter, the versatility can be expanded, and the cost can be reduced at the same time.

Further, since the fixing member for restricting the movement of the closing plug along the central axis of the through hole is provided between the end face plate and the closing plug, even if internal pressure is applied to the sleeve, the closing member is closed. The stopper is not displaced, and thereby the airtight state inside the sleeve is stably maintained.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, in which FIG. 1 is a side sectional view showing an end plate into which a plug is inserted, and FIG. 2 is a perspective view showing the plug. FIG. 3 is a perspective view showing a closure accommodating two connecting portions, FIG. 4 is a perspective view showing a closure accommodating one connecting portion, and FIGS. 5 and 6 are conventional examples corresponding to the present invention. FIG. 5 is a side cross-sectional view showing the end face plate into which the plug is inserted, and FIG. 6 is a perspective view showing the plug. 1 ... Cable, 2 ... Cable connection part, 3 ... Sleeve, 4 ... Cable body, 10 ... End plate, 11 ... Block plug, 13 ... Through hole, 14 ... Synthetic rubber tape (rubber tape) ), 16 …… Pin (fixing member).

Claims (1)

[Scope of utility model registration request] 1. A sleeve (3) having a tubular shape as a whole, in which a connecting portion (2) of a cable (1) is housed, and a main body of the cable (3) arranged at an end portion of these sleeves. 4) A closure having an end face plate (10) provided with a plurality of through holes (13) through which the cable connecting portion is arranged to be separated from the outside by the sleeve and the end face plate. In the above, the end face plate is formed of plastic, and a plastic plug plug (11) for closing the through hole is detachably provided in a through hole of the end face plate in which a cable is not inserted, A rubber tape (14) for adjusting the diameter of the closing plug is wound between the inner peripheral surface of the end plate forming the through hole and the outer peripheral surface of the closing plug, and further, the end plate and the closing plug. Between the plug and the Closure airtight structure, wherein a fixing member which restricts movement along the axis (16) is provided.