JPS6191886A - Sealer for cable connector - 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 (Technical Field) The present invention relates to a sealing device for a cable connector that requires a high degree of sealing performance, particularly for use in nuclear power plants.

(Prior art) As shown in FIG. 7, in a conventional cable connector, the outer periphery of a cable 1 consisting of a core is press-fitted into a center hole of a rubber bush 3 fixed to a plug shell 2, and each loose core 1α from the cable 1 is inserted into a female insulating member 4. Each female contact 5 fixed to
was connected to. However, the outer diameter of cable 1. The inner diameter of the rubber bushing 3 center hole varies depending on the number of cores. The setting is complicated, especially when using a multi-purpose cable, the outer circumference of each cable is sealed with a separate rubber bushing, which makes the structure complicated and expensive, and the loose core part is free and cannot be crossed left and right. However, since it is connected to a female contact, a certain length is required, and there is a problem in that the overall length of the connector becomes long.

(Objective) The present invention aims to simplify the structure and shorten the overall length of the connector by sealing the middle of the loose cores with a sealing bush instead of the outer periphery of the cable.

(Structure) In order to achieve the above object, the present invention provides a sealing bushing having a predetermined number of truncated conical protrusions each having a conical center hole protruding from one side of a disc, each of which has a conical center hole. Insert the loose cores of the cables into the respective holes and connect them to the contacts fixed in the through holes of the contact holder insulating member, press the ends of the through holes against the outer peripheral surface of each truncated conical projection, and press the ends of the through holes into each conical center hole. It is characterized by being pressure-sealed to the loose core. Hereinafter, a detailed explanation will be given based on an example. Reference numeral 10 denotes a sealing bush, which has a predetermined number of truncated conical protrusions 10C having a conical center hole 10b protruding from one side of a disc 10α, and is made of an elastic material such as rubber. The smooth surface of this sealing bush 10 is brought into contact with the washer 12 which is fixed to the collar 11a of the plug shell 11, and the holes of both are aligned, and each individual core 131Z from the multi-core cable 13 is inserted into the sealing push 10. The female contact 15 is inserted into the conical center hole 10h of the contact holder insulating member 14 and connected to the female contact 15 fixed in each hole 14α of the contact holder insulating member 14, and the nut 16 holding the contact holder insulating member 14 is screwed into the screw hole 11b of the plug shell 11. Then, each hole 144 presses the outer peripheral surface of each truncated conical projection 1.0.7 to press and seal each conical center hole 10b to each loose core 13a as shown in FIG. 1
0α is suppressed and sealed to the washer 12. Reference numeral 17 denotes a receptacle shell having the same structure as above, with a loose core 18a connected to a male contact 20 fixed in each hole 19c of a contact holding insulating member 19, pressed and sealed with a sealing bushing 21, and a male contact 2o connected to a female contact 15. A nut 16 which is fitted into the plug shell 11 and locked by a locking nut 22 is screwed into the receptacle shell 17 by a connecting nut 23 to form an integral unit. 24 is a tightening nut of the washer 25 which is in contact with the sealing bush 2, 26.27 is a contact retainer for preventing the female contact 15 and male contact 20 from being removed, 128 is a female insulator, and 29 is a male insulator. be.

(Effects) According to the present invention, the outer periphery of a cable consisting of multiple cores is not sealed, and the middle of the loose cores is fixedly sealed to the sealing bush, so the structure is simple, and the length of the loose cores can be shortened, so the connector The total length can be shortened.

[Brief explanation of drawings]

Fig. 1 is an upper half-cut front view of an embodiment of the present invention before the sealing bushing is tightened, Fig. 2 is a side view of the sealing bushing in Fig. 1, and Fig. 3 is a cross-sectional view taken along A-A in Fig. 2. Cross-sectional view, Figure 4 is an enlarged front cross-sectional view of the main part of the sealing bush before tightening, Figure 5
The figure is an enlarged front sectional view of the main part after tightening the sealing bushing, Figure 6 is a front sectional view of the main part after tightening the sealing bushing of Fig. 1, and Fig. 7 is a view equivalent to Fig. 6 of the conventional product. be. 10... Sealing bush, 10α... Disc, 1
0h...conical center hole, 10C... truncated conical projection, 1
1...Plug shell, 13...Cable, 13α・
...Discrete core, 14...Contact holder insulating member, 15
... Female contact, 17... Receptacle shell, 20... Female contact.

Claims (1)

[Claims] A predetermined number of truncated conical protrusions with a conical center hole are provided on one side of the disk, and the loose cores of the cable are inserted into each conical center hole of the sealing bush, which is made entirely of an elastic material, to insulate the contact holder. A sealing device for a cable connector, which is connected to a contact fixed in a through hole of a member, presses the end of the through hole against the outer circumferential surface of each truncated conical projection, and press-seals each conical center hole to each loose core.