JPH04127816A - Cable fixing structure - Google Patents

Abstract

PURPOSE:To fix it surely and stably over a long period even though the diameter of a cable is different a little without being influenced by the aging of the cable by forming a cable presser in a shape that the part corresponding to a recess is bent to project toward the recess. CONSTITUTION:A recess 7 a little larger than the diameter of a cable c is formed in a cable receiver 2, and a female screw holes 8 and 8 are formed on both sides of the recess 7. And the cable presser 9 is mad of a board material, and besides it is made in such shape that the part 10 corresponding to the recess 7 is curved to project toward the recess 7. Moreover, the presser 9 is fixed to the cable receiver 2, in the position separate from the recess 7. Furthermore, the cable presser 9 is fixed with screws 11 so that the projection 10 of the presser 9 may abut on the cable inserted in the recess 7 of the cable receiver, and a gap G is formed between the presser 9 and the fixing face 2a of the cable receiver 2.

Description

[Detailed Description of the Invention] [Summary] A cable fixing structure that can mechanically firmly fix shielded cables, power cables, etc. so that they do not move or move, and also allows reliable electrical connection for grounding. The purpose of this project is to create a cable fixing structure that can be fixed reliably and stably over a long period of time without being affected by changes in the cable over time, even if the cable diameter differs slightly. In the structure in which the cable is fixed with a pusher, a recess is formed in the cable receiver, and the cable is inserted into the recess, and the cable retainer is made of a plate material, and the recess is formed in the recess. The cable retainer is bent to protrude toward the recess at a position corresponding to the recess, and the cable retainer is fixed to the cable receiver at a position away from the recess on both sides of the protrusion. When the cable holder is fixed to the cable holder so that the protrusion of the cable holder contacts the cable inserted into the recess of the cable holder, the cable holder and the cable holder should be on the side. The structure is such that it is fixed so that there is a gap between it and the fixed surface.

[Industrial application field]

The present invention relates to a cable fixing structure that can mechanically firmly fix shielded cables, power cables, etc. so that they do not move or move, and also allows reliable electrical connection for grounding.

(Prior Art) Fig. 7 is a diagram showing a conventional shielded cable fixing structure, in which (a) is a plan view and (a) is a cross-sectional view taken along line bb in Fig. a1. 1 is a shielded cable, 2 is a cable receiver,
3 is a cable holding fitting. Shield cable 1
, remove the insulating outer cover 1a to expose the braided wire portion 1b for shielding, press the braided wire portion 1b with the holding metal fitting 3, and fix both sides of the holding metal fitting 30 to the cable receiver 2 with screws 4.4. It looks like this. lc is a signal line, 1
d is an insulating layer between the signal line 1c and the braided wire portion 1b.

Further, the cable receiver 2 is grounded.

[Problem to be solved by the invention]

By the way, with the structure in which the cable is fixed using the arc-shaped holding metal fitting 3 as shown in the figure, there is not much of a problem when it is first fixed, but as time passes, the cable may spread toward the gap 5 side due to the tightening force, or it may become plastically deformed and its elasticity may decrease. , the cable tightening force decreases. Therefore, especially when the cable l moves, noise is generated due to poor contact between the braided wire portion 1b and the presser metal fitting 3, making it impossible to meet the standards of radio wave related regulations, which are becoming stricter year by year.

Also, as shown in Figure 8, there is a semicircular recess 6 in the cable receiver 2.
The braided wire portion 1b of the cable is inserted into the braided wire portion 1b and fixed with the semicircular presser metal fitting 3a, thereby eliminating the gap in which the cable deforms, thereby preventing loosening due to deformation of the cable. However, it is necessary to match the diameter of the cable with the diameter of the circular arc of the recess 6 and the holding fitting 3a.
Not applicable to cables with different diameters. Further, since a decrease in elasticity and plastic deformation of the cable due to changes over time are unavoidable, the tightening force steadily decreases.

The technical problem of the present invention is to focus on these problems and to develop a cable fixing structure that is not affected by changes in cables over time and can be fixed reliably and stably over a long period of time even when the cable diameters are slightly different. It is about realization.

[Means to solve the problem]

FIG. 1 is a sectional view illustrating the basic principle of the cable fixing structure according to the present invention. Cable C is placed in cable receiver 2.
A recess 7 slightly larger than the diameter of the recess 7 is formed, and female threaded holes 8.8 are formed on both sides of the recess 7.

Reference numeral 9 denotes a cable holder according to the present invention, which is made of a plate material and has a bent shape at a position lO corresponding to the recess 7 so as to protrude toward the recess 7 side.

Further, this presser 9 is fixed to the cable receiver 2 on both sides of the protrusion 10 at a position away from the recess 7.

Reference numeral 11 exemplifies a screw as a fixing means, and the cable holder 9 is fixed with the screw 11 so that the protrusion 10 of the holder 9 comes into contact with the cable C inserted into the recess 7 of the cable receiver. In the fixed state, presser 9
and the fixing surface 2a of the cable receiver 2 so that a gap G is formed between the cable receiver 2 and the fixing surface 2a of the cable receiver 2.

In this figure, in order to ensure the gap G, a ring-shaped spacer 12 is arranged around the screw.

[Function] The presser 9 is made of a plate material, has a bent protrusion 10, and is fixed to the cable receiver 2 on both sides of the protrusion 10 at a position away from the recess 7 and with a gap G between them. has been done.

Therefore, the presser 9 is highly elastic in the direction shown by the arrow, and when the cable C is sandwiched and fixed between the protrusion 10 and the recess 7, even if the cable deforms plastically over time, The elasticity of the presser 9 allows the protrusion 10 to follow the plastic deformation of the cable and elastically press the cable, thereby preventing a reduction in the tightening force. This effect is maintained as long as the presser 9 maintains its elasticity.

Further, since the cable is fixed in the recess 7 of the cable receiver, the cable is prevented from spreading, but even if the cable spreads a little and the tightening force decreases, the elasticity of the presser 9 prevents the cable from spreading. follows, which prevents the tightening force from decreasing.

Furthermore, even if the diameters of the cables are slightly different, since the presser 9 has elasticity, the tightening force can be maintained reliably and over a long period of time.

[Example] Next, how the shielded cable fixing structure according to the present invention is actually implemented will be explained using an example. FIG. 2 shows an embodiment of the depression 7, which can also be a concave groove with the opening side widened as shown in the figure.

FIG. 3 shows an embodiment of the holding tool 9, and as shown in the figure, the protrusion 10 is arc-shaped so as to follow the outer circumferential shape of the cable C to be fixed. Moreover, the space between the protruding part 10 and the part fixed to the cable receiver is formed in an arc shape.

4 to 6 are cross-sectional views illustrating means for providing a gap G between the presser 9 and the cable receiver 2. FIG.

In FIG. 4, a portion 15 having a larger diameter than the threaded portion 14 is formed between the head 13 and the threaded portion 14 of the fixing screw lla. By setting the dimension of this large diameter portion 15 to be the sum of the gap G and the plate thickness t of the presser 9, a constant gap G is always ensured when the screw lla is fully screwed in.

On the other hand, FIG. 5 shows an example in which a normal screw llb is used and no spacer is used. In this embodiment, the depth of the screw hole 8 is shallow, and even if the screw Ilb is screwed in all the way,
The screw llb is made long so that only the plate thickness t+C of the presser 9 remains.

In addition, studs, studs, etc. may be used so that only the plate thickness t+C remains outside the cable receiver 2.

FIG. 6 shows an example in which the presser 9 is bent toward the cable receiver 2 by the dimension of the gap G, and this bent portion 16 is directly fixed to the cable receiver 2.

In this way, in the embodiments shown in FIGS. 4 to 6, no spacer is used, but if the spacer 12 is used as shown in FIG. 1, several types of spacers with different thicknesses are prepared and the diameter By selecting and using a spacer according to the cable diameter, such as using a thicker spacer when fixing a large cable, it is possible to deal with cases where the cable diameters differ greatly.

Additionally, the holding tool 9 and fixing screws 11, lla, and llb are as follows:
Metal is suitable for ensuring electrical connection between the braided wire portion 1b of the shielded cable and the cable receiver 2.

〔Effect of the invention〕

As described above, according to the present invention, the holding member 9 for shielded cables and power cables has a highly elastic shape and has a mounting structure that easily exhibits elasticity, so that the cable can Even if the cable is plastically deformed and elasticity decreases due to changes over time, the protrusion 10 holding the cable can follow the plastic deformation of the cable and elastically press the cable, thereby preventing the tightening force from decreasing.

Moreover, the elasticity of the holding tool 9 allows it to cope with deformation of the cable and cables with different diameters, and to securely fix the cable.

As described above, according to the present invention, the braided wire portion 1b of the shielded cable can be mechanically and reliably fixed to the cable receiver 2, the electrical connection can be ensured for a long time, and radiated noise can be effectively prevented. For example, in the case of the conventional fixing structure shown in Figure 7 of 4J, the 40.0Od required by FCC regulations
The radiation noise of 30 to 80 MfL for Bu V is 3
While the noise level was as high as 5 dB, it was reduced to 23 dB when the structure shown in Figure 1 was adopted for this ship. In the end, 12d1 was also improved compared to the conventional fixing structure.

[Brief explanation of the drawing]

Fig. 1 is a sectional view explaining the basic principle of the cable fixing structure according to the present invention, Figs. 2 to 6 are diagrams showing embodiments of each part of the cable fixing structure according to the present invention, and Fig. 2 is an embodiment of the recess. 3 is a front view showing an embodiment of the holding tool, and FIGS. 4 to 6 are
The figures are cross-sectional views showing various embodiments of gap setting structures, and FIGS. 7 and 8 are views showing conventional cable fixing structures. In the figure, 1 is a shielded cable, la is an insulated outer cover,
lb is a braided wire part, lc is a signal line, ld is an insulating layer, 2 is a cable receiver, 2a is a fixing surface, 3.3a, 9 are cable holders (holding metal fittings), 4 is a fixing screw, 6 is a semicircle C is a cable, 7 is a hollow, 8 is a female screw hole, 10 is a protrusion, 11. lla and llb are fixing screws, 12 is a spacer, 16 is a bent portion, and G is a gap, respectively. Patent Applicant Fujitsu Limited Sub-Agent Patent Attorney Yasushi Fukushima Text Box 21! 1 Ki S Tatsumi

Claims (1)

[Claims] In a structure in which the cable is pressed and fixed to the cable receiver with a presser, the cable receiver (2) is formed with a recess (7) into which the cable is inserted, and the cable (c) is inserted into the recess (7). The cable retainer (9) is made of a plate material, and the position (10) corresponding to the recess (7) is located in the recess (7).
), and the cable retainer (9) is fixed to the cable receiver (2) at a position away from the recess (7) on both sides of the protrusion (10). so that the protrusion (10) of the cable holder (9) comes into contact with the cable (c) inserted into the recess (7) of the cable receiver (2). , while the cable holder (9) is fixed to the cable receiver (2), the cable holder (9) is fixed to the cable holder (2).
9) and a fixing surface (2a) on the cable receiver (2) side, the cable is fixed so that a gap (G) is formed between the cable receiver (2) and the fixing surface (2a).