JP2775604B2 - Core case for cable clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core case for a cable clamp of a noise filter used for removing radiation noise of a power cable, a signal cable and the like using a cylindrical split type ferrite core.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional split-type ferrite core having a pair of arc-shaped split ferrite cores 15 and 16 for removing radiation noise from a power cable, a signal cable or the like using a split-type ferrite core. And a cable clamp core case 1. The cable clamp core case 1 is made of resin (generally 66 nylon).
It consists of a pair of case divided bodies 2 and 3 that are swingably connected to each other by a plate hinge 10. In the conventional noise filter, the split type ferrite cores 15 and 16 are housed in the cable clamp core cases 2 and 3, respectively, to form one annular core, and the power cable or the signal cable is inserted in the hole of the core. As shown in FIG. 5 (a), the plate hinge 10 is bent by 180 [deg.] So that the two case divisions 2 and 3 abut and engage with each other. The cable 17 was fixed.

[0003]

In a conventional resin cable clamp core case having a plate hinge, when the plate hinge is bent by 180 °, the plate hinge becomes thin (generally, the plate thickness is about 0.5 mm). Therefore, there is a drawback that the hinge is easily broken, and once the plate hinge is broken, it cannot be used again. In order to remove this defect, the root of the plate hinge is subjected to R processing to increase the plate thickness, strengthened against mechanical stress,
Even if this plate hinge was bent by 180 °, it was not broken.

However, even if the R processing is performed as described above, the plate hinge may be broken when the plate hinge is bent by 180 ° and the case divided members are brought into engagement with each other at the time of drying or low temperature. was there.

Further, when the core case for the cable clamp is opened, there is a large difference in how the case splits are opened due to variations in the thickness of the plate hinge and the number of times the case splits are abutted. When
There was also a problem that it took time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a core case for a cable clamp in which a hinge portion is not damaged at the time of drying or low temperature and the opening of a case divided body does not vary. is there.

[0007]

According to the present invention, there is provided a core case made of resin for accommodating a split type ferrite core, the split case comprising a pair of case split jointly holding the split type ferrite core. A cable clamp core case, wherein the pair of case divided bodies are swingably connected to each other, the pair of case divided bodies are swingably connected to each other by a hinge mechanism, and the hinge mechanism is A cross-sectional shape provided on one of the pair of case divided bodies has a square rotation center axis, and the other is provided on the other of the pair of case divided bodies to rotatably support the rotation center axis. A core case for a cable clamp, comprising: a bearing that engages with each side surface of the rotation center shaft and locks the rotation center shaft.

[0008]

In the core case for a cable clamp according to the present invention, the case divided bodies are swingably connected to each other by a hinge mechanism having a rotation center shaft and a bearing. There is no breakage, and by engaging each side surface of the rotation center shaft of the hinge mechanism with the bearing, one of the case divided bodies is locked at a predetermined position via the rotation center shaft, whereby the core case for the cable clamp is provided. It is possible to realize a core case for a cable clamp that can make opening and closing of the cable constant and can be easily performed.

[0009]

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

FIGS. 1A and 1B are views showing a core case for a cable clamp according to an embodiment of the present invention, wherein FIG. 1A is a front view, FIG. 1B is a side view, FIG. FIG. 3 is a view showing one of the case divided bodies of the cable clamp core case shown in FIG. 1, (a) is a front view, (b) is a side view, (c) is a plan view, and FIG. It is a figure which shows the other case division body of the core case for cable clamps shown, (a) is a front view, (b) is a side view, (c) is a top view.

As shown in FIG. 2, the cable clamp core case 1 of the present embodiment has a first case divided body 2 provided with two rotation center shafts 20, and as shown in FIG. The second case divided body 3 is provided with two bearings 30 that rotatably support the bearing 20. The rotation center shaft 20 is inserted into the bearing 30, and has a configuration as shown in FIG. 1.

As described above, the hinge mechanism is constituted by the rotation center shaft 20 provided on the first case split body 2 and the bearing 30 provided on the second case split body 3. The first case split body 2 and the second case split body 3 are swingably connected to each other. The cross-sectional shape of the rotation center shaft 20 of the hinge mechanism is a quadrangle. The cross-sectional shape of the bearing 30 of the hinge mechanism is also square. A notch 21 for receiving the bearing 30 is formed near the rotation center shaft 20 of the first case split body 2. On the other hand, the bearing 30 of the second case split body 3
Is formed with a notch 30a.
The upper wall portion 30b is narrower than the other portions and is easily bent. By bending the upper wall portion 30b, the rotation center shaft 20 can rotate within the bearing 30. At this time, the side wall surfaces of the rotation center shaft 20 and the inner wall surfaces of the bearing 30 are engaged with each other, and
Lock every other °. As a result, the first case divided body 2
Are 90 ° and 180 ° with respect to the second case divided body 3.
Locked at the pivoted position. Further, a retaining piece 30c is formed below the bearing 30. This retaining piece 3
A nail 30d is formed at the tip of the hook 30c.
The engagement of d with one axial end surface of the rotation center shaft 20 prevents the rotation center shaft 20 from falling off the bearing 30.

FIGS. 4A and 4B are views showing the opening and closing operations of the cable clamp core case of the present embodiment, wherein FIG. 4A shows a state in which the cable clamp core case is closed, and FIG. Shows a state in which the core case is opened by 90 °, and FIG.
This shows an open state. As shown in FIGS. 4A to 4C, when the core case for the cable clamp is opened and closed, the side wall surface of the rotation center shaft 20 of the hinge mechanism and the inner wall surface of the bearing 30 match (FIG. 4B). ) And the state shown in FIG. 4 (c)), and even if it is repeatedly opened and closed at the time of drying or low temperature, the connecting portion is not damaged, and the core case for the cable clamp is opened and closed. Easy to do.

[0014]

As described above, the cable clamp core case according to the present invention can be easily opened and closed without damage to the connecting portion even when it is repeatedly opened and closed at the time of drying or low temperature.

[Brief description of the drawings]

FIG. 1 shows a cable clamp core case of the present invention, wherein (a) is a front view, (b) is a side view, and (c) is a plan view.

FIGS. 2A and 2B show one case divided body of the cable clamp core case shown in FIG. 1, wherein FIG. 2A is a front view, FIG. 2B is a side view, and FIG.

3A and 3B show another case divided body of the cable clamp core case shown in FIG. 1, wherein FIG. 3A is a front view, FIG. 3B is a side view, and FIG. 3C is a plan view.

4A and 4B show opening and closing operations of a core case for a cable clamp of the present invention, wherein FIG. 4A is a cross-sectional view in a state where the core case for a cable clamp is closed, and FIG. (C) is a cross-sectional view showing a state in which the cable clamp core case is opened by 180 °.

FIG. 5 shows a conventional cable clamp core case,
(A) is a front view, (b) is a side view, and (c) is a plan view.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 core case for cable clamp 2 first case split body 3 second case split body 20 rotation center shaft 30 bearing

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiki Kondo 3-2 Chidori-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Denko KK Kawasaki Resin Research Institute Hikaru Hei 3-66219 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01F 17/06 H05K 9/00

Claims (1)

(57) [Claims] 1. A core case for a cable clamp made of resin for accommodating a split type ferrite core, comprising: a pair of case split bodies jointly holding the split type ferrite core; In a cable clamp core case in which the bodies are swingably connected to each other, the pair of case split bodies are swingably connected to each other by a hinge mechanism, and the hinge mechanism includes a pair of the case split bodies. A rotation center shaft provided on one side has a rectangular cross section, and the rotation center shaft is rotatably supported on the other of the pair of case divided bodies and is engaged with each side surface of the rotation center shaft. And a bearing for locking the rotation center shaft.