JPH0626014Y2 - Cable fixing device - Google Patents

Description

The present invention relates to a cable fixing device, and more particularly to a cable fixing device that is easy to assemble and has a waterproof and dustproof structure.

(Prior Art) Conventionally, as shown in FIG. 6, when fixing a cable of this type, an elastic member 4 is press-fitted between the case body 1 and the cable 6, and a hole formed in the holding metal fitting 6 is inserted into the case body. It was carried out by fitting the projection 2 of No. 1. Further, the press-fitting step was performed by a method of press-fitting in 3 to 5 times, for example.

(Problems to be solved by the invention) However, in the above-described conventional one, in the work of press-fitting the elastic member 4 between the main body case and the cable 5, waterproofness and tensile strength cannot be maintained due to insufficient press-fitting, or press-fitting is not possible. Case crack occurs due to excess,
There is a problem that variations in performance are likely to occur.
Further, the elastic member 4 has to be forcibly press-fitted, and its workability is also difficult.

The present invention eliminates the above problems, does not require jigs and tools,
It is an object of the present invention to provide a cable fixing device that can firmly fix a cable only by fitting due to the concavo-convex relationship, has easy workability, and is waterproof.

(Means for Solving the Problems) In order to achieve the above object, a cable fixing device according to the present invention is provided with a through hole in a side surface of a cable body, and a cable is inserted into the through hole, the case body and a holding member. In a cable fixing device that engages with each other in a concave-convex relationship, a projecting portion is formed around the through hole, and a concave-convex engaging portion that engages with the holding member is provided on the outer periphery thereof, and a step is provided outside the through hole. And a pair of elastic tongues that are inserted into the insertion hole and that engage with the outside of the protruding portion. And a O-ring is provided on the stepped portion so as to be pressed by the elastic tongue and to allow the projecting portion of the case body and the holding member to engage with each other in a concavo-convex manner. is there.

(Operation) As described above, according to the present invention, the stepped portion is formed continuously with the through hole of the case body, and the insertion hole having the tapered surface extending outward is connected to the stepped portion, and the O-ring is arranged on the stepped portion. The elastic tongue provided on the holding member is guided by the tapered surface, thereby squeezing inward and holding the outer circumference of the cable,
The flat washer at the tip presses the O-ring to fit it into the case body in a concave-convex relationship.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of the main part of the cable fixing device of the present invention, and FIG.
FIG. 3 is an exploded perspective view of the cable fixing device of the present invention, and FIG. 3 is an enlarged sectional view of a main part of the cable fixing device of the present invention.

In the figure, 10 is a case main body, 11 is a protruding portion of the case main body 10, and 12
Is a protrusion formed on the upper and lower surfaces of the protrusion 11, 13 is a protrusion formed on the bottom surface of the case body 10, 14 is a mounting hole formed in the protrusion 13, 15 is a fiber, 16 is an O-ring, 17 Is a plain washer, 18
Is a cable, 19 is an insertion hole, 20 is a holding member, and 21 is a holding member.
20 is a base, 22 is a pair of holding pieces extending horizontally from the upper and lower ends of the base 21, 23 is a square hole formed in the holding piece 22, 24 is a through hole formed in the center of the base 21, 25 is the base 21 The elastic tongue pieces extend horizontally from the upper and lower peripheral surfaces of the through hole 24.

As shown in these figures, a light projecting element and a light receiving element (not shown) of a photoelectric switch are provided in the case body 10, and a cable 18 projects from a through hole 11c on the side surface of the case body 10.

Then, the projecting portion 11 is formed on the case body 10 around the through hole 11c, and the holding member 20 is attached to the upper and lower outer surfaces thereof. At this time, the rectangular hole 23 formed in the holding piece 22 of the holding member 20 is fitted into the protrusion 12. With this structure, the protrusion 11
And the square holes 23 are used to engage and disengage.

A recess (not shown) may be formed in the protrusion 11 and a protrusion (not shown) may be formed in the holding piece 22 so that the concave and convex engagement is performed.

Further, the stepped portion 11a is formed outside the through hole 11c, and the insertion hole 19 in which the tapered surface 11b that spreads outward is formed.

Further, the holding member 20 has a substantially U-shape formed of a base 21 and a pair of holding pieces 22, and a square hole 23 that engages with the protrusion 12 of the case body 10 is formed on the opposite side surface of the holding piece 22. Has been done. In addition, the through hole 24 of the cable 18 is provided at the approximate center of the base 21.
Is formed, and a pair of elastic tongue pieces 25 are provided on the upper and lower portions thereof.

When the holding member 20 is engaged with the case main body 10, the elastic tongue piece 25 is guided by the insertion hole 19 having the tapered surface 11b and buds to clamp and fix the outer periphery of the cable 18, and the flat washer 17
The O-ring 16 mounted on the outer circumference of the cable 18 is pressed by the tip of the elastic tongue piece 25 and disposed between the step portions 11a.

FIG. 4 is a sectional view of a first modification of the holding member of the present invention.

In this embodiment, the holding member 30 has a base 31, and a through hole through which a cable is inserted in the center of the base 31.
34 is formed and has a pair of elastic tongues 35 protruding vertically along the through hole 34, and a projection 36 is formed on the inner surface of the tip end portion thereof.

Therefore, the elastic tongue piece 35 of the holding member 30 is attached to the above-mentioned protrusion 11
When pushed in along the tapered surface 11b of, the elastic tongue 35
Firmly clamps the cable, and the cable is firmly fixed to the case body 10.

FIG. 5 is a perspective view of a second modification of the holding member of the present invention. A part of the holding piece is broken.

In this embodiment, the holding member 40 has a base 41, and a through hole through which a cable is inserted at the center of the base 41.
44 is formed. Then, the cylindrical portion 45 having the pair of elastic tongues 47 protruding vertically along the through hole 44 is
It is provided so as to project around the periphery of 44 and the extension. With this structure, the flat washer 17 as shown in FIGS. 2 and 3 becomes unnecessary, and the tip of the cylindrical portion 45 presses the O-ring, so that the waterproof property can be improved.

The present invention is not limited to the above embodiment,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As described in detail above, according to the present invention, the following effects can be achieved.

(1) An elastic tongue is provided on the holding member, and the elastic tongue firmly clamps the outer circumference of the cable by fitting the elastic tongue in the insertion hole formed with the tapered surface.
It can be performed reliably and firmly.

(2) Water resistance is improved by providing a step outside the through hole, disposing an O-ring on the step, and pressing the O-ring with the tip of a holding member provided with an elastic tongue. Can be achieved.

(3) The elastic tongue is provided by providing the holding member with the elastic tongue, providing the stepped portion in the insertion hole having the tapered surface formed on the case body, and disposing the O-ring on the stepped portion and fitting the stepped portion. Since the O-ring is pressed by the tip of the holding member, the tensile strength and waterproofness of the cable can be quickly and accurately maintained in the same component and the same work process, and the work can be simplified.

(4) Compared to a conventional cable in which an elastic member is provided and the elastic member is press-fitted into a through hole provided in the case body, jigs are not required, and the assembly can be performed easily and in a short time. The workability is extremely good.

[Brief description of drawings]

FIG. 1 is a sectional view of the main part of the cable fixing device of the present invention, and FIG.
FIG. 4 is an exploded perspective view of the cable fixing device of the present invention, FIG. 3 is an enlarged cross-sectional view of a main part of the cable fixing device of the present invention, FIG. 4 is a cross-sectional view of a first modification of the holding member of the present invention, and FIG. FIG. 6 is a perspective view of a second modified example of the holding member of the present invention, and FIG. 6 is a cross-sectional view of a main part of a conventional cable fixing portion. 10 ... Case body, 11 ... Projection part, 11a ... Step part, 11b ... Tapered surface, 11c, 24, 34, 44 ... Through hole, 12 ... Projection part, 13 ... Convex part, 14
… Mounting hole, 15… Fiber, 16… O-ring, 17… Plain washer,
18 ... Cable, 19 ... Insertion hole, 20, 30, 40 ... Holding member, 21, 3
1,41 ... base, 22 ... holding piece, 23 ... square hole, 25,35,47 ... elastic tongue, 36 ... projection, 45 ... cylindrical part.

Claims (2)

[Scope of utility model registration request] 1. A cable fixing device in which a through hole is provided in a side surface of a case body, a cable is inserted into the through hole, and the case body and a holding member are engaged with each other in a concave-convex relationship, and a projecting portion is provided around the through hole. The concave-convex engaging portion that engages with the holding member is provided on the outer periphery of the through-hole, and a step portion is formed outside the through hole, and an insertion hole having a tapered surface that spreads outward is provided, A pair of elastic tongues to be inserted into the insertion holes are provided, a concave and convex engaging portion that engages with the outside of the projecting portion is provided to form a holding member, and an O-ring is provided on the step portion, A cable fixing device in which the projecting portion of the case body and the holding member are engaged with each other by pressing with an elastic tongue. 2. A cable fixing device according to claim 1, wherein a cylindrical portion to be inserted into the insertion hole is provided substantially in the center of the holding member, and an elastic tongue piece is formed by cutting out a part of the cylindrical portion.