JPH01122578A - Clamping method for shielded cable - Google Patents

Abstract

PURPOSE:To enable the fitting of shielded cables of different diameters as a unit by winding a metal mesh around a shield layer exposed via the removal of a sheath over the predetermined length up to a diameter optimum for engagement with the hooking part of a cable clamp, and fixing the mesh via the engagement. CONSTITUTION:The sheath 3a of a shielded cable 3 is peeled off over the predetermined length and a shield layer 3b thereby exposed is wound with a metal mesh 8 up to a diameter optimum for engagement with the engagement part 7a of a cable clamp 7. Namely, the mesh 8 has a width W approximately equal to the length of the shield layer 3b and a given length L, and a clasp 9 having a hooking claw 9a is fitted to the upper and lower ends of the mesh 8 in a length-wise direction, using a caulking method and the like. If the diameter of the shield layer 3b is too small for the mesh 8 to agree to the engagement part 7a of the clamp 7, the mesh 8 is wound about the shield layer 3b, starting from the end thereof not fitted with the clasp 9. The widning end of the mesh 8 is hooked to the claw 9a and fixed, thereby keeping the diameter of the shield layer 3b equal to the engagement part 7a. The mesh 8, therefore, is engaged with the engagement part 7a with an optimum pressing force, and the sheilded cable 3 can be fixed to the fitting part thereof as a unit.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a cable clamping method for fixing a shielded cable to a housing, etc., and is aimed at reliably fixing multiple shielded cables of different thicknesses at once. Peel off a predetermined length of the cable sheath and wrap a metal mesh around the exposed shield layer until it has the optimal thickness to engage the engaging part of the cable clamp. The installation is configured to be fixed to the part.

[Industrial application field]

The present invention relates to a cable clamping method for fixing a shielded cable to a housing or the like.

Shielded cables are usually used for signal cables between information processing equipment and peripheral devices such as printers and displays to prevent noise.

The shielded cable is fixed at the entrance of the device using a cable clamp, but at the same time as this is fixed, it is necessary to ground the shield layer of the cable to the device.

[Conventional technology]

The side view in Figure 3 shows the metal casing 1 that has a shielding effect.
This figure shows a state in which a shielded cable (signal cable) 3 is introduced from the outside to a device 2, such as a printed board, mounted inside the device and connected using a connector 4.

The shielded cable 3 is introduced from the bottom of the housing 1, and at the introduction part, as shown in the perspective view of FIG. 4, it is fixed with a cable clamp 5 and grounded at the same time.

That is, the shield cable 3 is peeled off by a length such that the jacket 3a made of polyethylene or the like is engaged with the cable clamp 5, and the shield layer 3b made of a shield braid or the like is exposed.

On the other hand, in the metal frame 1a of the housing 1, threaded holes 1b for fixing the cable clamps 5 are bored at a predetermined pitch.

The cable clamp 5 is made of metal and has a semicircular engagement part 5a in the center having a diameter substantially equal to the diameter of the shield layer 3b of the shielded cable, and metal frames 1a are provided on both sides of the engagement part 5a. The screw hole 1b is provided with a through hole 5b of the same pitch.

Therefore, the shielded cable 3 is fixed by engaging the engaging portion 5a of the cable clamp 5 with the exposed shielding layer 3b.
Insert the screw 6 into the through hole 5b, and attach the screw to the cable clamp 5.
The cable clamp 5 is clamped and fixed to the metal frame 1a, and is also pressed directly to the metal frame 1a or with a cable clamp 5.
grounded through.

In addition, when there are a plurality of shielded cables 3 as shown in the perspective view of FIG. 5, the shield layers 3b are arranged in parallel so that they are parallel to each other, and a cable clamp 7 with a wide engaging portion 7a is used. A common method is to engage and fix each shield layer 3b all at once.

[Problem that the invention seeks to solve]

Shielded cables are fixed to the case and grounded as explained above, but when fixing multiple shielded cables, the thickness of each shielded cable may vary depending on the type and thickness of the shielded cables. It is necessary to use a plurality of cable clamps with engaging portions that match, and a wide installation requires space.

Further, there are problems such as difficulty in handling cases where the type of cable differs depending on the user's options.

Means for Solving Problem C] FIG. 1 (Al is a perspective view showing the shielded cable clamping method of the present invention.

In the present invention, the outer sheath 3a of the shielded cable 3 is peeled off by a predetermined length, and the exposed shielding layer 3b has the optimum thickness for engaging the metal mesh 8 with the engaging portion 7a of the cable clamp 7. Wrap it until the end.

[Effect]

A metal mesh was wrapped around the shield layer so that the thickness matched the engaging part of the cable clamp, and the metal mesh was fixed to the engaging part of the cable clamp.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention.

Identical parts are designated by the same reference numerals throughout the figures.

In the present invention, as shown in the perspective view of FIG. 1(a) showing a method of clamping the shielded cable, and the enlarged view of part A in FIG. A metal mesh 8 is wrapped around the shield layer 3b exposed by peeling off a predetermined length until it has an optimal thickness for engaging with the engaging portion 7a of the cable clamp 7.

In other words, as shown in the plan view of FIG. As shown in the side view shown in Figure (bl), the hook is attached by a method such as caulking with a fastener 9 having a claw 9a.

Such a metal mesh 8 has a thin thickness of the shield layer 3b of the shield cable 3, and is suitable for the engagement portion 7 of the cable clamp 7.
a, wrap the shield layer 3b from the side that does not have the clasp 9, hook the terminal end of the clasp 9 with the claw 9a, and fix the end of the clasp 9 with the engaging part 7a of the cable clamp 7. The thickness is made to match.

Therefore, by wrapping the metal mesh 8, even if the thickness of the shield cable itself varies, the thickness of the shield layer 3b can be made constant, and the optimal pressure can be applied to the engaging portion 7a of the cable clamp 7. By engaging with pressure, the attachment is secured to the part.

〔Effect of the invention〕

As explained above, by using the shielded cable clamping method of the present invention, even if the multiple shielded cables to be attached to a section are of different types and have different thicknesses, the cables can be attached by wrapping the metal mesh appropriately. This has great economic and industrial effects, such as being able to mount them all at once using clamps.

[Brief explanation of the drawing]

Figure 1 (al is a perspective view showing the shielded cable clamping method of the present invention, Figure 1 fbl is an enlarged view of part A of al, Figure 2 ta+
is a plan view of the metal mesh, Figure 2) is a side view of the metal mesh, Figure 3 is a side view showing the state in which the shielded cable is connected from the outside to the device mounted inside the casing, and Figure 4 FIG. 5 is a perspective view showing a conventional method of fixing shielded cables using a cable clamp, and FIG. 5 is a perspective view showing a conventional method of fixing a plurality of shielded cables at once using a cable clamp. In the figure, ■ is the housing, 1a is the metal frame, 1b is the through hole, 2 is the device, 3 is the shielded cable, 3a is the jacket, 3b is the shield layer, 4 is the connector, 5.7 is the cable clamp , 5a and 7a are engaging parts, 5b is a through hole, 6 is a screw,
8 is a metal mesh, 9 is a clasp,
In 9a, the hook is a claw. mouth area

Claims (1)

[Claims] A metal mesh (8) is attached to the engaging portion (7a) of the cable clamp (7) on the shield layer (3b) exposed by peeling off the jacket (3a) of the shield cable (3) for a predetermined length. A clamp for a shielded cable, characterized in that the cable is wrapped until it has an optimal thickness for engagement with the cable clamp, and is fixed to the attachment part by engaging with the engagement part (7a) of the cable clamp (7). Method.