JP5122312B2 - Seal connector for shielded cable connection - Google Patents

Description

  The present invention relates to a shielded connector for connecting a shielded cable used for sealing (leakage prevention) of a shielded cable used for connection with a device.

Conventionally, for a cable used for connection with a device, the seal member inserted into the nipple is tightened with the nipple and the crocodile nut so that the seal member is reduced in the axial center (inner diameter direction) and closely attached to the cable. An example of a technique for preventing leakage is disclosed (for example, see Patent Document 1).
JP 2004-180352 A

  Although the technique of Patent Document 1 is applied to a general cable, this technique can be similarly applied to a shielded cable. An application example is shown in FIG. 6, for example. In the case of FIG. 6, since the ground wire 111 is connected to the wire blade 113, the shield cable 110 is fixed to a predetermined hole of the device 70 with the connector 100, and the ground wire 111 is fastened to a terminal provided on the device 70. Need to be grounded. Therefore, there is a problem that it takes time and labor in that the work of fastening the ground wire 111 is required in addition to the work of fixing the connector 100, and if the fastening of the ground wire 111 is forgotten, it is not grounded.

  The present invention has been made in view of the above points, and provides a sealed connector for connecting a shielded cable that can reliably ground the wire blade by reducing the amount of work compared to the prior art while preventing leakage. Objective.

(1) Means for solving the problem (hereinafter simply referred to as “solution means”) 1 is as described in claim 1.
According to the solution 1, the elastic sleeve is inserted into the nipple while the wire blade is covered with the covering portion, and the two flange portions are positioned between the outer end of the nipple and the outer end of the taper washer. In this state, when the nipple and the hook nut are engaged with each other, the two flange portions are both compressed toward the groove portion, bulge in the axial direction around the groove portion, and bite into the outer periphery of the shield cable. Since the wire blade is grounded to the device (for example, the housing) through the conductive nipple and the lock nut that are in direct contact with each other, there is no need for fastening the ground wire as in the conventional case, and the work amount can be reduced as compared with the conventional case. . Further, since the elastic sleeve bites into and comes into close contact with the shielded cable simply by engaging the nipple and the owl nut, it is possible to prevent leakage.

(2) Solution 2 is as described in claim 2.
According to the solution 2, the tapered portion of the nipple is formed so as to become gradually narrower in the direction in which the shield cable is inserted. Even if the diameter of the shielded cable is small or large, it is possible to reliably ground the device through the nipple by simply inserting the elastic sleeve into the nipple with the wire blade placed on the covering portion.

(3) The solving means 3 is as described in claim 3.
According to the solution 3, the elastic sleeve is formed such that the end portion on the side where the covering portion is formed is shaped to be hooked on the end portion of the outer sheath of the shielded cable (for example, an L shape). Therefore, the two flange portions provided in the elastic sleeve can be reliably positioned between the outer end of the nipple and the outer end of the taper washer. Therefore, it is possible to prevent leakage by biting into the outer periphery of the shielded cable with the groove portion of the elastic sleeve as the center.

  According to the present invention, it is possible to reliably ground the wire blade by reducing the amount of work compared to the conventional one while preventing leakage.

  The best mode for carrying out the present invention will be described with reference to FIGS.

  First, FIG. 1 schematically shows an exploded configuration example of a seal connector in a partially broken view. That is, the upper half is represented by a sectional view and the lower half is represented by an external view. The seal connector of the present invention is constituted by components such as a lock nut 10, a nipple 20, an elastic sleeve 30, a taper washer 40, and an owl nut 50. Except for the elastic sleeve 30, each component is formed of a conductive material (for example, metal or conductive resin).

  The lock nut 10 has a threaded portion 11, a sharpened portion 12, and the like. The screw portion 11 meshes with a screw portion 24 of the nipple 20 described later, and fixes the entire seal connector to the device. The sharpened portion 12 has a sharp tip, and when it is fixed to the device, it comes into contact with the housing to ensure conduction (grounding).

  The nipple 20 includes a storage part 21, a taper part 22, an inclined part 23, screw parts 24, 25, and the like. The storage unit 21 stores a packing 71 (see FIG. 3) described later. The tapered portion 22 is formed so as to become gradually narrower (in other words, the diameter becomes smaller) in the direction in which the shield cable is inserted (that is, the left direction in the drawing). The inclination part 23 compresses the flange parts 33 and 35 of the elastic sleeve 30 to the groove part 34 side together with the inclination part 41 of the taper washer 40 described later. The screw portion 25 meshes with the screw portion 51 of the owl nut 50 and compresses the flange portions 33 and 35 by the inclined portions 23 and 41 described above.

  The elastic sleeve 30 is formed of an elastic material, and has a flange portion 31, a covering portion 32, a groove portion 34, two flange portions 33 and 35, and the like. The collar portion 31 is an end portion on the side where the covering portion 32 is formed, and in this example, is formed in an L shape so as to protrude in the axial direction. The coating | coated part 32 is a site | part of the outer peripheral surface which covers the wire braid | blade of a shield cable. The two flange portions 33 and 35 are formed with a groove portion 34 therebetween.

  The taper washer 40 has an inclined portion 41, a flange portion 42, and the like. The owl nut 50 has a screw portion 51, a locking portion 52, and the like. The taper washer 40 is used by being inserted into the owl nut 50 so that the flange portion 42 is locked by the locking portion 52.

  A method of fixing the shielded cable to the device using the seal connector configured as described above will be described with reference to FIGS. FIG. 2 shows a state where an elastic sleeve or the like is passed through the shielded cable. FIG. 3 shows a state before the seal connector is fastened. FIG. 4 shows a state after the seal connector is fastened. FIG. 5 shows an enlarged part of FIG.

  First, the nipple 20 in which the packing 71 is fitted in the storage portion 21 is fixed to a predetermined hole of the device 70 using the lock nut 10. Specifically, the screw portion 11 of the lock nut 10 and the screw portion 24 of the nipple 20 are engaged and fastened until the sharpened portion 12 of the lock nut 10 hits the device 70 and stops. The state thus fixed is shown in FIG. In addition, the apparatus 70 (specifically housing | casing) shall be earth | grounded previously.

  On the other hand, the elastic sleeve 30, the taper washer 40 and the owl nut 50 are passed through the shield cable 60. Among these, the elastic sleeve 30 is stopped by the collar portion 31 hitting the end portion of the exterior covering 64. The state at this time is shown in FIG. The shield cable 60 of this example has a plurality of wires 61 (three in FIG. 2B but actually several tens in FIG. 2B) from the inside to the outside, an interior covering 62, a wire blade 63, and an exterior covering. The order is 64.

  In the state shown in FIG. 2B, the end of the wire blade 63 is turned over (see arrow D1), and the wire blade 63 covers the covering portion 32 of the elastic sleeve 30. Then, when the nipple 20 is passed through the electric wire 61 of the shield cable 60 and the screw portion 25 of the nipple 20 and the screw portion 51 of the flocc nut 50 are slightly engaged, the result is as shown in FIG.

In FIG. 3, the wire blade 63 that is turned upside down and covers the covering portion 32 is in close contact with the tapered portion 22 of the nipple 20. Two flange portions 33 and 35 are located between the inclined portion 23 (outer end) of the nipple 20 and the inclined portion 41 (outer end) of the taper washer 40.
When the threaded portion 25 of the nipple 20 and the threaded portion 51 of the owl nut 50 are tightened, the owl nut 50 moves in a predetermined direction (the arrow D2 direction in the drawing). In accordance with this movement, the inclined portion 23 of the nipple 20 and the inclined portion 41 of the taper washer 40 compress both the flange portions 33 and 35 of the elastic sleeve 30 toward the groove portion 34, and the groove portion 34 gradually disappears. When fastening of the owl nut 50 to the nipple 20 is completed, the flange portions 33 and 35 are in contact with each other as shown in FIG. 4, and the elastic sleeve 30 around the groove portion 34 swells in the axial direction of the shield cable 60. Take out and bite into the perimeter.

  Referring to FIG. 5 in which a part of FIG. 4 is enlarged, the wire blade 63 covering the covering portion 32 contacts the taper portion 22, that is, the nipple 20, and the sharpened portion 12 of the lock nut 10 meshing with the nipple 20 is attached to the device 70. Contact. Therefore, the external noise N flows in the order of the wire blade 63 → the nipple 20 → the lock nut 10 → the device 70 and is grounded (see the arrow D3 shown in FIG. 5).

According to the embodiment described above, the following effects can be obtained.
(1) The elastic sleeve 30 is inserted into the nipple 20 with the wire blade 63 covered on the covering portion 32, and the two flange portions 33, between the inclined portion 23 of the nipple 20 and the inclined portion 41 of the taper washer 40, 35 was positioned (see FIG. 3). In this state, when the nipple 20 and the frog nut 50 are engaged with each other, the two flange portions 33 and 35 are both compressed toward the groove portion 34, and bulge in the axial direction around the groove portion 34, and are formed on the outer periphery of the shield cable 60. Encroach (see FIG. 4). Since the wire blade 63 is grounded to the device 70 through the nipple 20 and the lock nut 10 that are in direct contact (see FIG. 5), the conventional fastening operation of the ground wire 111 becomes unnecessary, and the work amount is reduced as compared with the conventional case. be able to. Further, since the elastic sleeve 30 bites into and comes into close contact with the shield cable 60 only by engaging the nipple 20 and the owl nut 50, leakage can be prevented.

(2) The tapered portion 22 of the nipple 20 is formed so as to become gradually narrower in the direction in which the shield cable 60 is inserted (see FIGS. 1 and 3). Even if the diameter of the shielded cable 60 is small or large, the device 70 can be securely grounded through the nipple 20 by simply inserting the elastic sleeve 30 into the nipple 20 with the wire blade 63 covered on the covering portion 32.

(3) The collar portion 31 of the elastic sleeve 30 is formed in an L shape that is hooked on the end portion of the outer sheath 64 in the shielded cable 60 (see FIGS. 1 and 3). Therefore, the two flange portions 33 and 35 provided in the elastic sleeve 30 can be reliably positioned between the inclined portion 23 of the nipple 20 and the inclined portion 41 of the taper washer 40. Therefore, leakage can be prevented by biting into the outer periphery of the shielded cable 60 around the groove 34 of the elastic sleeve 30.

[Other Embodiments]
Although the best mode for carrying out the present invention has been described above, the present invention is not limited to this mode. In other words, various forms can be implemented without departing from the scope of the present invention. For example, the following forms may be realized.

(1) In the above-described embodiment, when the nipple 20 is fixed to the device 70 using the lock nut 10, the screw portion 11 of the lock nut 10 and the screw portion 24 of the nipple 20 are engaged and fastened (FIG. 2). (See (B)). Instead of this form, the nipple 20 may be fixed to the device 70 using the lock nut 10 by fastening means other than the threaded portion, and only the nipple 20 is replaced with a conductive fastening member (for example, a screw) without using the lock nut 10. Or a rivet or the like). In any form, the device 70 can be grounded from the nipple 20 through the lock nut 10 or the fastening member.

(2) In the above-described embodiment, the flange portion 31 of the elastic sleeve 30 is formed in an L shape that is hooked on the end portion of the outer sheath 64 of the shielded cable 60 (see FIGS. 1 and 3). Instead of this form, the collar portion 31 may be formed in a shape other than the L-shape (for example, a shape such as a U-shape or a J-shape) and hooked on the end of the exterior covering 64. Even in a shape other than the L-shape, the two flange portions 33 and 35 provided in the elastic sleeve 30 can be reliably positioned between the inclined portion 23 of the nipple 20 and the inclined portion 41 of the taper washer 40. it can. Therefore, the same effect as the above-described embodiment can be obtained.

(3) In the above-described embodiment, the tapered washer 40 and the owl nut 50 are configured separately (see FIG. 1). Instead of this form, the taper washer 40 and the owl nut 50 may be configured integrally. In other words, the inclined portion 41 may be provided at the portion of the locking portion 52 in the owl nut 50. Even in this structure, both the flange portion 33 and 35 together with the inclined portion 23 of the nipple 20 are compressed toward the groove portion 34, and bulges in the axial direction around the groove portion 34 and bites into the outer periphery of the shield cable 60. Can be made. Therefore, the same effect as the above-described embodiment can be obtained.

It is a figure showing typically the example of decomposition composition of a seal connector. It is a figure showing the state which passed the elastic sleeve etc. through the shield cable. It is a figure showing the state before fastening a seal connector. It is a figure showing the state after fastening a seal connector. It is a figure which expands and represents a part of FIG. It is a figure showing the example which fixed the shield cable to the apparatus with the connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lock nut 11 Screw part 12 Sharp part 20 Nipple 21 Storage part 22 Taper part 23 Inclination part 24 Screw part 25 Screw part 30 Elastic sleeve 31 Gripper part 32 Cover part 33, 35 Flange part 34 Groove part 40 Taper washer 41 Inclination part 42 Flange Part 50 Owl nut 51 Screw part 52 Locking part 60 Shield cable 61 Electric wire 62 Interior coating 63 Wire blade 64 Exterior coating 70 Equipment 71 Packing 100 Connector 110 Shield cable 111 Ground wire 112 Electric wire 113 Wire blade N Noise

Claims (3)

A shielded cable having a conductive nipple that can be inserted into a shielded cable and fixed to a predetermined hole of the device using a lock nut, a owl nut that meshes with the nipple, and a taper washer attached to the inside of the owl nut. A sealed connector for connecting a shielded cable that is tightened by engaging a nipple inserted with a crocodile nut,
It is formed in a cylindrical shape into which a shielded cable can be inserted, and has an elastic sleeve provided with a covering portion for covering the outer peripheral surface with the wire blade of the inserted shielded cable, and two flange portions formed with a groove interposed therebetween,
The elastic sleeve is inserted into the nipple with the wire blade covered, and two flanges are positioned between the outer end of the nipple and the outer end of the taper washer to engage the nipple and the crocodile nut. A shield connector for connecting a shielded cable, wherein two flanges are sometimes compressed toward the groove and bulge in the axial direction around the groove so as to be able to bite into the outer periphery of the shielded cable. A sealed connector for connecting a shielded cable according to claim 1,
The nipple is a sealed connector for connecting a shielded cable having a tapered portion formed so as to be gradually narrowed in a direction in which the shielded cable is inserted. A sealed connector for connecting a shielded cable according to claim 1 or 2,
The elastic sleeve is a sealed connector for connecting a shielded cable in which the end portion on the side where the covering portion is formed is hooked to the end portion of the sheath covering of the shielded cable.

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