JPS6141085B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cable fixing device for fixing a wired cable to a main body of a machine, a switchbox, or the like.

The characteristics required for this type of cable fixing device are that it can firmly fix the cable, that it will not loosen even if the fixed cable is mechanically bent repeatedly, and that the fixing part should be waterproof, making it easy to install. In addition, the same cable fixing device can be used for a wide range of cables with different outer diameters, and the cable can be fixed with a simple operation. However, with conventional cables,
For example, although the cable can be firmly fixed and can withstand cable bending well, it has the disadvantage that it is not waterproof and cannot be widely applied to cables with different outer diameters because the structure focuses on fixing the cable. cables, or cables with a complicated structure to improve cable fixation and waterproofness, and which have the disadvantage of requiring extremely troublesome cable installation operations, or cables with a predetermined outer diameter, There have been problems in that some parts have to be replaced each time a different cable is used, and the characteristics required of a cable fixing device cannot be satisfied.

The present invention superimposes a bell-shaped packing between an outer housing and an inner housing that can be screwed together, a guide ring having a guide hole, and a tightening ring having a plurality of flexible claw pieces. The various drawbacks of the above-mentioned conventional methods have been eliminated by screwing the claws of the tightening ring onto the cable and fixing the cable, and by attaching the bell-shaped packing to the cable to improve waterproofness. It is intended to provide a cable fixing device.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention. Reference numeral 1 denotes an outer housing, on the outer periphery of which a male threaded portion 2, a flange portion 3, and a hexagonal portion 4 are respectively provided, and an inner housing. A packing insertion groove 5 and a female threaded part 6 are formed around the periphery, and an inner housing 7 is formed in the female threaded part 6.
A male threaded portion 8 is screwed together, and a stepped portion 9 is formed at the tip of the male threaded portion 8 on the outer periphery of the inner housing 7, and a hexagonal shaped portion 10 is formed at the terminal end, and an inner hole 11 is formed. ing. 12 is a flat packing, and 13 is a hexagonal nut, which are attached to the male threaded portion 2 of the outer housing 1. Reference numeral 14 denotes a bell-shaped packing made of a highly elastic material such as synthetic rubber, and a tip 16 having an inner hole 15 is made somewhat thicker, and a large diameter flange 17 is attached to the outer housing. The distal end portion 16 is fitted into the packing insertion groove 5 of the outer housing 1 so as to protrude from the left end of the outer housing 1. Reference numeral 18 denotes a guide ring having a conical hole 13 as a guide hole, which is fitted into the outer housing 1 adjacent to the large diameter flange portion 17 of the bell-shaped packing 14, and 20 a plurality of flexible pawls inclined inwardly. A tightening ring formed around the piece 21 is inserted into the outer housing 1 in a direction in which the outer inclined surface of the inwardly inclined flexible claw piece 21 comes into contact with the conical hole 19 of the guide ring 18. At the same time, the annular portion 22 is connected to the stepped portion 9 of the inner housing 7.
The mating position is determined.

In FIG. 1, the cable is not inserted and therefore the inner housing 7 is inserted into the outer housing 1.
are still not fully screwed together, and the tightening ring 20 and guide ring 18
are spaced apart, and the flexible claw pieces 21 of the tightening ring 20 are fully expanded. In this state, as shown in FIG. 3, insert the male screw part 2 of the outer housing 1 into the mounting part 23 of the cable fixing device itself, such as a switch case, and secure the flat packing 12 with the flange part 3 and hexagonal nut 13. After tightening and fixing the cable 24 through the cable, the cable 24 is inserted into the cable fixture from the direction of the arrow a in the figure. At this time, the flexible claw piece 21 of the tightening ring 20 is in an open state as described above, and the cable 24 can be easily inserted into the cable fixture. 24
is inserted, and when the hexagonal part 10 of the inner housing 7 is grasped with a wrench or the like and screwed onto the outer housing 1, the inner housing 7 penetrates into the outer housing 1 and the tightening ring 20 advances inward, making it flexible. The flexible claw piece 21 comes into contact with the conical hole 19 of the guide ring 18, and is guided by this conical wall and falls inward, so that the tip of the flexible claw piece 21 digs deeply into the outer periphery of the cable 24, making the cable 24 strong. In addition to being fixed, the thick end portion 16 of the bell-shaped packing 14
The large-diameter flange portion 17 of the bell-shaped packing 14 is pressed against the guide ring 18 by the penetration of the inner housing 7, and is elasticized into the packing insertion groove 5 of the outer housing 1. Cable 24 and bell-shaped packing 14
The space between the outer housing 1 and the bell-shaped packing 14 is sealed, thereby improving waterproofness.

In addition, the cable 2 fixed by the tightening ring 20
4 has moderate pull-out strength in both the directions of arrows a and b in the figure, but the shape of the flexible claw piece 21 makes the pull-out strength in the direction of arrow b in the figure extremely strong, and the outer housing 1 On the other hand, by adjusting the tightening of the inner housing 7, even if the cable 24 has a different outer diameter, it can be firmly fixed. It can be widely applied to Furthermore, even if the cable 24 is repeatedly bent with respect to the cable fixing device at its fixing part, the flexible claw piece 21 of the tightening ring 20 has elasticity, and the characteristics of the thin wall part of the bell-shaped packing 14. This allows the cable 24 to be fixed stably without affecting its waterproof properties.

FIG. 4 shows a second embodiment of the present invention, in which the bell-shaped packing 1 is different from the first embodiment.
The guide ring 18 is superimposed adjacent to the large diameter flange portion 17 of the inner housing 7, and the tightening ring 20 is fitted into the stepped portion 9 of the inner housing 7, so that the conical hole 19 of the guide ring 18 and the tightening ring 20 are connected to each other. For the one facing the flexible claw piece 21,
The annular portion 22 of the tightening ring 20 is packed into a bell-shaped packing 14.
It fits into the large diameter flange portion 17 of the guide ring 18.
is inserted into the stepped portion 9 of the inner housing 7 so that the conical hole 19 and the flexible claw piece 21 are opposed to each other. The operation and effect are the same as those of the embodiment.

Therefore, depending on which direction it is necessary to particularly strengthen the pull-out strength of the cable 24, the first
As in the embodiment or the second embodiment, the direction of the flexible claw piece 21 of the tightening ring 20 can be selected and used.

FIG. 5 shows a third embodiment of the present invention, in which a cover portion 1' is provided on the outer housing 1 to cover the tip 16 of the bell-shaped packing 14, and a mounting portion for a switch case or the like is provided. The operation and effect are the same as in the first embodiment, except that the position of the cable fixing device 23 is shifted to minimize the portion of the cable fixing device body that protrudes to the left in the figure with respect to the mounting portion 23.

FIG. 6 shows a fourth embodiment of the present invention. In this case, the direction of the fastening ring 20 of the second embodiment is changed from that of the first embodiment. The direction of the tightening ring 20 is changed, and the other functions and effects are the same as those of the third embodiment.

FIG. 7 shows a fifth embodiment of the present invention. In this case, the guide hole 19' of the guide ring 18' has an arcuate cross section, and the arcuate surface is formed by the flexible claw piece 21 of the tightening ring 20.
, and a step 25 is provided on the outer periphery, and the inner end surface 11' of the inner hole 11 of the inner housing 7 has an arcuate cross section like the guide hole 19' of the guide ring 18'. The configuration is similar to that of the first embodiment,
Accordingly, in this embodiment, when the inner housing 7 is screwed onto the outer housing 1 and the flexible claw piece 21 of the tightening ring 20 is tightened to the outer periphery of the cable 24 with the guide ring 18', the guide ring 18'' and the sliding surface of the flexible claw piece 21 are in line contact, making it possible to lighten the tightening operation and to reduce wear on the outer wall surface of the flexible claw piece 21.

FIG. 8 shows a sixth embodiment of the present invention, in which the direction of the fastening ring 20 of the second embodiment is changed from that of the first embodiment, and in this case, the direction of the fastening ring 20 of the second embodiment is changed from that of the first embodiment. In the second and fourth embodiments, it was necessary to change the direction of the tightening ring 20 and the direction and position of the guide ring 18, but in this embodiment, the direction of the guide ring 18 was changed. The ring 18' is connected to the flange portion 17 of the bell-shaped packing 14 as in the fifth embodiment.
Change only the direction of the tightening ring 20 while still polymerizing with the
The outer wall surface of the flexible claw piece 21 of the tightening ring 20 is made to face the circular arc surface of the inner hole 11 of the inner housing 7, and the annular portion 22 of the tightening ring 20 is arranged to face the circular arc surface of the inner hole 11 of the inner housing 7.
It is fitted into the stepped portion 25 of 8'.

As a result, the cable 24 is tightened by the tightening ring 2.
The flexible claw piece 21 of 0 is inserted into the inner hole 1 of the inner housing 7.
The bell-shaped packing 14 is fixed by a guide ring 18' as in the fifth embodiment, and the bell-shaped packing 14 and the cable 24 are tightened. Because it does not come into direct contact with the movable tightening ring 20, damage to the relatively flexible bell-shaped packing 14 can be prevented, and when selecting a direction where the cable 24 needs to be particularly strong in pulling out. Compared to the fifth embodiment, it is sufficient to simply change the direction of the tightening ring 20, making handling easier.

As described above, the present invention includes a bell-shaped packing having an inner hole, a guide ring having a guide hole, and a plurality of flexible The bell-shaped packing is attached to the outer periphery of the inserted cable, and the inner housing is screwed into the outer housing, so that the flexible claws of the tightening ring are superposed. A cable fixing device adapted to fasten the cable, whereby the cable can be fastened extremely firmly and the fixed cable will not loosen even if the fixed cable is mechanically bent repeatedly. It has the effect of saying.

Further, there is an effect that high waterproofness can be maintained between the cable and the packing and between the packing and the housing.

Furthermore, the flexible claws of the tightening ring are designed to bite into the cable simply by screwing the inner housing into the outer housing, and the bell-shaped fittings make it possible to reduce the outer diameter. It has the effect of being widely applicable to many different types of cables.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is an exploded perspective view, FIG. 3 is a longitudinal sectional view explaining the operation, and FIG. The figure is a longitudinal sectional view of the second embodiment, FIG. 5 is a longitudinal sectional view of the third embodiment, FIG. 6 is a longitudinal sectional view of the fourth embodiment, and FIG. 7 is a longitudinal sectional view of the fifth embodiment. FIG. 8 is a longitudinal sectional view of the sixth embodiment. 1... Outer housing, 2... Male threaded part, 3...
...Flange part, 4...Hexagonal shaped part, 5...Packing insertion groove, 6...Female threaded part, 7...Inner housing, 8...Male threaded part, 9...Stepped part, 10...Hexagonal shaped part , 11... Inner hole, 14... Bell-shaped packing, 15... Inner hole, 16... Thick tip, 17
...Large diameter flange part, 18, 18'...Guide ring,
19, 19'... Guide hole, 20... Tightening ring, 21
... Flexible claw piece, 22 ... Annular part, 23 ... Mounting part, 24 ... Cable.

Claims (1)

[Claims] 1. A bell-shaped packing having an inner hole, a guide ring having a guide hole, and a plurality of inwardly inclined flexible claws are provided between an outer housing and an inner housing that can be screwed together. The bell-shaped packing is attached to the outer periphery of the inserted cable, and by screwing the inner housing into the outer housing, the flexible claws of the tightening ring are used to A cable fixing device characterized by being designed to tighten a cable. 2. The cable fixing device according to claim 1, wherein the guide hole of the guide ring is a conical hole, and the cable is fastened by abutting the flexible claw of the tightening ring into the conical hole. 3. The guide hole of the guide ring has an arcuate cross-section, and the end surface of the inner hole of the inner housing has an arcuate cross-section, so that the cable is tightened by abutting the flexible claw of the tightening ring on either of the arcuate surfaces. The cable fixing device according to claim 1.