JPH0755027Y2 - cable clamp - Google Patents

Description

[Detailed Description of the Invention] [Outline] A cable clamp for grounding a cable to a housing, which aims to provide a cable clamp with high grounding reliability and easy cable fixing work. The lower clamp 11 is composed of a combination of a clamp 11 and an upper clamp 15. The lower clamp 11 is composed of a lower plate member 12 and a lower vertical plate member 13 having a right angle above one end thereof. A hole 26 for inserting a bolt is provided, and a plurality of slits 14 parallel to the upper edge are provided on the upper part of the lower vertical plate member 13, and an upper clamp 15 is a horizontal plate member 18, which is formed at a right angle downward from one end thereof. The engaging vertical plate member 19 is composed of an upper vertical plate member 17 having a right angle downward from the other end and an upper plate member 16 extending outward from the lower end thereof at a right angle. The engaging vertical plate member 19 has a lower end. From the inside to the bottom vertical plate member 13
The upper vertical plate member 17 has a length substantially equal to the length of the lower vertical plate member 13, and the upper plate-shaped member 16 has a lower plate-shaped member at its tip. A hole 27 that matches the hole 26 for inserting the bolt of 12 is provided, and the protruding piece 19A of the engaging vertical plate member 19 is provided from the outside to the lower vertical plate member 1.
The hinge means 20 is formed by inserting the slit means 3 into the slit 14, and the shield braided portion of the cable (1) is press-fitted into the rectangular tube portion formed by the lower clamp 11 and the upper clamp 15, and the upper plate member 16 is inserted. The bolts are inserted into the holes 27 and 26 for inserting the bolts, which are superposed on the lower plate member 12, and are screwed into the screw holes on the surface of the housing 7.

[Industrial application field]

The present invention relates to a cable clamp that grounds a cable to a housing.

When using an electronic device that transmits and receives a digital signal, it is required to reduce unnecessary electromagnetic radiation (noise).

Therefore, the cable connecting between digital devices connects the shield braid of the cable to the housing at the entrance / exit of the housing housing the devices.

[Conventional technology]

FIG. 4 is a perspective view of a conventional clamp, and FIG. 5 is a diagram showing use of the conventional clamp.

In FIG. 4, reference numeral 1 is a cable for transmitting a digital signal, and the shield braid 2 is exposed by peeling the outer cover.

5 is a conventional clamp in which a semi-cylindrical portion 6 is provided in the center of a strip made of a metal having good conductivity (brass, for example).

The clamp 5 covers the semi-cylindrical portion 6 on the shield braid 2, inserts small screws into the holes provided on the sleeve plates on both sides of the semi-cylindrical portion 6, and secures the cable 1 to the housing or the like by fixing the cable 1. In addition to being grounded, the cable 1 is fixed to a housing or the like.

The above-mentioned clamp 5 has a simple structure and a small size, and is convenient for grounding a large number of arranged cables 1 as shown in FIG.

That is, the cable introduction port 4 is provided on the bottom plate 8 of the housing 7 that houses the digital device, and the metal clamp base 9 provided with the horizontal members 9A in multiple stages is installed near the cable introduction port 4.

Then, the clamps 5, which respectively press the shield braided portions of the cables 1, are attached in parallel to the horizontal member 9A.

[Problems to be solved by the device]

However, in the above-mentioned conventional clamp, since the semi-cylindrical portion holds almost half of the cable, the sleeve plate of the clamp does not adhere to the housing.

Therefore, only the casing side of the cylindrical shield braid is useful for the grounding effect, and there is a problem that the reliability of grounding is low.

Further, in order to attach the clamp to the housing, it is necessary to alternately screw small screws penetrating both sleeve plates, which causes a problem that the work of fixing the cable is troublesome.

An object of the present invention is to provide a cable clamp that has high reliability of grounding and is easy to fix the cable.

[Means for Solving the Problems]

According to the present invention, as described above, the clamp 10 comprises a combination of a lower clamp 11 and an upper clamp 15 as shown in FIGS. 1 and 2, and the lower clamp 11 is located above the lower plate member 12 and one end thereof. The lower plate member 12 is formed of a right-angled lower vertical plate member 13. The lower plate member 12 is provided with a hole 26 for inserting a bolt, and the upper part of the lower vertical plate member 13 has a plurality of slits 14 parallel to the upper edge. The upper clamp 15 includes a horizontal plate member 18, an engaging vertical plate member 19 having a right angle downward from one end thereof, an upper vertical plate member 17 having a right angle downward from the other end, and a right angle shape from a lower end thereof. The upper plate member 16 extends outward, and the engaging vertical plate member 19 extends from the lower end to the inner side, and the lower vertical plate member 13
The upper vertical plate member 17 has a length substantially equal to the length of the lower vertical plate member 13, and the upper plate-shaped member 16 has a lower plate-shaped member at its tip. A hole 27 that matches the hole 26 for inserting the bolt of 12 is provided, and the protruding piece 19A of the engaging vertical plate member 19 is provided from the outside to the lower vertical plate member 1.
The hinge means 20 is formed by inserting the slit means 3 into the slit 14, and the shield braided portion of the cable (1) is press-fitted into the rectangular tube portion formed by the lower clamp 11 and the upper clamp 15, and the upper plate member 16 is inserted. This is achieved by a cable clamp characterized in that the bolts, which are superposed on the lower plate-shaped member 12 and are inserted into the bolt insertion holes 27 and 26, are screwed into the screw holes on the surface of the housing 7.

[Action]

According to the present invention, the upper clamp 15 is a lower clamp.
A projecting piece of the engaging vertical plate member 19 at one end thereof in a shape covering 11
19A is the slit 14 of the lower vertical plate member 13 of the lower clamp.
The hinge means is formed by being inserted from the outside into the hinge means, and the upper clamp can open upward on the lower clamp with the hinge means as an axis.

Further, since the upper vertical plate member 17 of the upper clamp has a height substantially equal to the height of the lower vertical plate member 13, when the upper clamp is closed, the horizontal plate member 18 and the upper vertical plate member 1 are
7, the lower vertical plate member 13 and the lower plate member 12 form a laterally oriented rectangular tube portion, the upper plate member 16 is in full contact with the lower plate member 12, and the bolt insertion hole 27 is a hole. 26 will be completely overlaid.

Therefore, when the upper clamp is opened and the upper clamp is closed while the shield braided portion of the cable having a diameter slightly larger than the width of the rectangular tube portion is pressed against the lower vertical plate member 13,
In the closing process, the engaging vertical plate member 19 rotates on the outside of the lower vertical plate member, so that the movement of the engaging vertical plate member does not affect the braided portion in the rectangular tube portion at all, and the movement of the braided portion does not occur. The side is further pressed by the upper vertical plate member 17 toward the lower vertical plate member, and is finally pushed into the rectangular tube portion without damaging the surface of the braided portion.

As a result, the circular cross section of the shield braided portion is deformed into a shape similar to the rectangular tube portion at the outer circumference thereof, and contacts the inner circumference of the rectangular tube portion in a wide range.

When the upper clamp finally closes the lower clamp, the holes 26 and 27 for inserting the bolts are completely aligned.
If you screw the bolt that passed through this hole into the screw hole on the housing surface,
The lower plate-shaped member 12 entirely contacts the housing surface, and the upper plate-shaped member 16 entirely contacts the lower plate-shaped member 12.

Therefore, the contact resistance between the shield braid, which is in contact with a wide area in the rectangular tube formed by the upper and lower clamps, and the housing surface is small, grounding is reliably performed, and the upper clamp is closed to secure the holes. When the bolts through 26 and 27 are screwed into the screw holes on the surface of the housing, the holding of the cable to the housing is finished.

That is, in the present invention, the shield braided portion of the cable is press-fitted into the square tubular portion without damaging it, the outer circumference of the braided portion is widely contacted with the inner circumference of the square tubular portion, and the upper clamp is closed. At the same time, means that the attachment of the cable clamp to the housing is completed.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram of an embodiment of the present invention, (a) is a perspective view,
(B) is a sectional view, FIG. 2 is a perspective view showing the clamp in a separated form, and FIG. 3 is a perspective view showing the use of the clamp of the present invention.

The clamp 10 made of a metal plate (for example, brass) for peeling off the jacket of the cable 1 to expose the shield braid 2 portion and gripping the shield braid 2 portion has a lower clamp 11 and an upper clamp 15 hinged. They are connected by means 20.

As shown in detail in FIG. 2, the lower clamp 11 has a lower vertical plate member 13 and an L-shaped side view, which is composed of a lower plate-shaped member 12 having a lower surface closely contacting a desired portion of the housing 7, A slit 14 is provided in the upper part of the lower vertical plate member 13 in parallel with the edge, and a hole 26 into which the neck of the bolt 30 is inserted is provided in the lower plate member 12.

The upper clamp 15 includes an upper plate member 16 that overlaps the lower plate member 12 of the lower clamp 11, an upper vertical plate member 17 and a horizontal plate member 18 that rise from the side edges in an inverted L shape, and a horizontal plate member. Engagement vertical plate member with 18 side edges bent downward
It is composed of 19 and is almost Z-shaped in side view.

Then, a part of the lower portion of the engaging vertical plate member 19 is bent inward to provide a projecting piece 19A which is fitted / engaged with the slit 14.

Therefore, by engaging the protruding piece 19A with the slit 14 of the lower clamp 11, the hinge means 20 shown in FIG. 1 is constructed. The hinge means 20 is a detachable hinge means.

On the other hand, the upper plate member 16 of the upper clamp 15 is provided with a hole 27 into which the neck of the bolt 30 is inserted, at a position corresponding to the hole 26 of the lower plate member 12 of the lower clamp 11.

As shown in FIG. 1, the clamp 10 configured as described above is configured such that the shield braid 2 of the cable 1 is inserted into the rectangular tube portion formed by the lower clamp 11 and the upper clamp 15, and the upper clamp 15 is closed to close the upper portion. The plate member 16 is overlaid on the lower plate member 12,
The bolt 30 is inserted into the holes 27 and 26, and the screw portion is screwed into the screw hole 8A of the housing 7.

That is, the upper plate-shaped member 16 of the upper clamp 15 is almost in close contact with the lower plate-shaped member 12 of the lower clamp 11, and the lower plate-shaped member 12
The lower surface of the clamp 10 is in close contact with the surface of the housing 7, and the clamp 10 is fixed to the housing 7.

Therefore, the upper vertical plate member 17 and the horizontal plate member 18 of the upper clamp 15 and the lower vertical plate member 13 of the lower clamp 11 and a part of the lower plate-like member 12 of the cable 1 inserted in the rectangular tube portion are formed. As shown in FIG. 1 (b), the shield braid 2 portion is deformed into a substantially rectangular shape, and its outer peripheral surface is in pressure contact with each of the four inner walls of the rectangular tubular portion.

The lower plate member 12 of the lower clamp 11 is in close contact with the flat surface portion of the housing 7.

Therefore, the shield braid 2 and the housing 7 come into close contact with each other via the clamp 10, and the reliability of grounding is high.

On the other hand, using the hinge means 20 as a fulcrum, open the upper clamp 15,
After the cable 1 is stored in the rectangular tube, the upper clamp 15
Is closed and the bolt 30 is screwed, the outer peripheral surface of the shield braid 2 is pressed against the inner wall of the rectangular tube portion, and the clamp 10 is fixed to the housing 7. That is, the work of fixing the cable 1 is easy.

The clamp 10 described above is used as shown in FIG.

In FIG. 3, the housing 7 accommodates the digital device 35, and the bottom plate 8 of the housing 7 is provided with the cable introduction port 4.

Then, the cable 1 is drawn into the housing 7 through the cable introduction port 4 and connected to the digital device 35.

On the other hand, the outer jacket of the cable 1 is peeled off to expose the shield braid, and the shield braid is gripped by the clamp 10, and the clamp 10 is fixed near the cable introduction port 4.

In this way, by fixing the clamp 10 to the entrance / exit of the housing 7,
Since the cable 1 is grounded, unwanted electromagnetic waves are prevented from entering the digital device or being emitted to the outside.

[Effect of device]

INDUSTRIAL APPLICABILITY As described above, the present invention is a cable clamp in which a shielded braided portion of a cable is held in a rectangular tube portion composed of a lower clamp and an upper clamp, and the reliability of grounding is high and the cable is It has a practically excellent effect that the fixing work of is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram of an embodiment of the present invention, (a) is a perspective view,
(B) is a sectional view, FIG. 2 is a perspective view showing the clamp in a separated form, FIG. 3 is a perspective view showing the use of the clamp of the present invention, FIG. 4 is a perspective view of a conventional clamp, and FIG. Is a diagram showing the use of a conventional clamp. In the figure, 1 is a cable, 2 is a shield braid, 4 is a cable inlet, 5 and 10 are clamps, 6 are semi-cylindrical parts, 7 is a housing, 8 is a bottom plate, 8A is a screw hole, 9 is a clamp base, 11 is a lower clamp, 12 is a lower plate member, 13 and 17 are lower and upper vertical plate members, 14 is a slit, 15 is an upper clamp, 16 is an upper plate member, 18 is a horizontal plate member, and 19 is an engagement member. A vertical plate member, 19A is a protrusion, 20 is a hinge means, 26 and 27 are holes, 30 is a bolt, and 35 is a digital device.

Claims (1)

[Scope of utility model registration request] 1. A clamp 10 comprises a combination of a lower clamp 11 and an upper clamp 15. The lower clamp 11 is composed of a lower plate member 12 and a lower vertical plate member 13 which is perpendicular to one end thereof, A hole 26 for inserting a bolt is provided at the tip of the plate member 12, a plurality of slits 14 parallel to the upper edge are provided at the upper part of the lower vertical plate member 13, and the upper clamp 15 is a horizontal plate member 18, It is composed of an engaging vertical plate member 19 having a right angle downward from one end thereof, an upper vertical plate member 17 having a right angle downward from the other end, and an upper plate member 16 extending outward from the lower end thereof at a right angle. , The engaging vertical plate member 19 is inward from the lower end, and the lower vertical plate member 13
The upper vertical plate member 17 has a length substantially equal to the length of the lower vertical plate member 13, and the upper plate-shaped member 16 has a lower plate-shaped member at its tip. A hole 27 that matches the hole 26 for inserting the bolt of 12 is provided, and the protruding piece 19A of the engaging vertical plate member 19 is provided from the outside to the lower vertical plate member 1.
The hinge means 20 is formed by inserting the slit means 3 into the slit 14, and the shield braided portion of the cable (1) is press-fitted into the rectangular tube portion formed by the lower clamp 11 and the upper clamp 15, and the upper plate member 16 is inserted. A cable clamp, characterized in that the bolts are inserted into holes 27 and 26 for inserting bolts, which are superposed on the lower plate-like member 12 and screwed into screw holes on the surface of the housing 7.