JP4634860B2 - Clamp - Google Patents

Description

  The present invention belongs to the technical field of clamps for attaching wires such as optical fibers and electric wires to plates and wall surfaces.

As a clamp to attach a wire such as an optical fiber or electric wire to a plate-like material,
An attachment base to which attachment means such as a snap for attaching to a plate-like material are connected, one end is connected to the attachment base as a fixed end, and the other end which is a free end has a locking projection A belt part to which the elastic arm is connected, a locking hole for elastically deforming and receiving the elastic arm, and a locking receiving protrusion formed to protrude inward from the peripheral wall of the locking hole to lock the locking protrusion. Provided with a latch receiving portion connected to the mounting base,
An elastic arm is inserted into a locking hole to be elastically deformed, and the locking protrusion is locked to the locking receiving protrusion by the repulsive force of the elastic deformation, so that the wire is gripped and attached by the belt-shaped belt. There is a clamp attached to a plate-like material (for example, a sheet metal of an automobile, a housing of an electronic device, etc.) by means.
Japanese Utility Model Publication No. 57-104081 (FIG. 3)

  In the conventional clamp, when the elastic arm is inserted into the locking hole, the wire may be sandwiched between the elastic arm and the peripheral wall of the locking hole. When such pinching occurs, the elastic arm cannot be sufficiently inserted into the locking hole, and the locking projection and the locking receiving projection are not properly locked. In particular, in the case of an optical fiber, there is a possibility that distortion caused by the compression accompanying this pinching causes deterioration of light transmission, or in the worst case, the optical fiber breaks.

The clamp according to claim 1 is:
An attachment base to which attachment means for attaching to the plate-like material are connected,
One end is connected to the mounting base as a fixed end, and the other end, which is a free end, is connected to an elastic arm having a locking projection,
A locking hole that elastically deforms and receives the elastic arm, and a locking receiving protrusion that protrudes inward from a peripheral wall of the locking hole and locks the locking protrusion, are connected to the mounting base. A latch receiving portion to be
The elastic arm is inserted into the locking hole to be elastically deformed, and the locking protrusion is locked to the locking receiving protrusion by the repulsive force of the elastic deformation, whereby the wire member is formed into an annular body. In the clamp that is attached to the plate-like material by the attachment means,
A part of the upper edge of the facing portion facing the fixed end portion of the peripheral wall is an inclined edge portion, and the protruding height from the mounting base on the lower end side of the inclined edge portion is higher than the upper end side of the inclined edge portion. Providing a low low edge,
The elastic arm is provided with an extrusion surface that is inclined opposite to the inclined edge portion when the elastic arm is inserted into the locking hole in a portion that passes through the inside of the facing portion during the insertion. And

  An attachment means such as a snap for attaching to the plate-like material, a fixed end portion of the belt portion, and a latch receiving portion are connected to the attachment base portion of the clamp according to claim 1. In addition, an elastic arm having a locking projection is connected to the free end of the belt portion, a locking hole for elastically deforming and receiving the elastic arm in the locking receiving portion, and an inward protruding from the peripheral wall of the locking hole. And a latch receiving projection for locking the latch projection.

  Then, the elastic arm is inserted into the locking hole to be elastically deformed, and the locking protrusion is locked to the locking receiving protrusion by the repulsive force of the elastic deformation, thereby forming the belt portion into an annular body. Note that the attachment base may be a part of the annular body. A clamp that grips the wire rod with the belt-like band is attached to the plate-like member by the attaching means. Alternatively, after the clamp is attached to the plate-like material by the attaching means, the belt portion is formed into an annular body to grip the wire.

  In the operation of gripping the annular body, the wire is placed on the mounting base before the annular body is formed. At this time, since the longitudinal direction of the wire is along the facing portion, the wire may get on the upper edge of the facing portion. is there. When the elastic arm is inserted into the locking hole with the wire rod riding on the upper edge of the facing portion in this way, the above-described pinching is likely to occur in the conventional clamp.

However, in this clamp, a part of the upper edge of the facing portion that faces the fixed end of the peripheral wall is an inclined edge, and the protruding height from the mounting base on the lower end side of the inclined edge is the inclined edge. A lower edge portion is provided that is lower than the upper end side, and the elastic arm passes through the inner surface of the facing portion during insertion through an extrusion surface that is reverse to the inclined edge portion when the elastic arm is inserted into the locking hole. The elastic arm is formed with a thick portion having an avoiding slope that approaches the inclined edge and faces the inclined edge when the locking projection is locked to the locking receiving projection. The thick portion is inclined at the end which is the low edge side when the locking projection is locked to the locking receiving projection, and the inclination is on the side facing the inner side of the annular body. It is formed to be thinner tip part of the wire when inserting the elastic arm in the locking hole inclination If it rides on the part and passes above the locking hole, the elastic arm pushes the wire above the locking hole, so that the wire is moved along the inclined edge from the lower end to the lower edge. .

Moreover, since the inclination of the extrusion surface is inclined opposite to the inclined edge when the elastic arm is inserted into the locking hole,
If the extrusion surface 23 comes into contact with the wire by causing the elastic arm to enter the locking hole, the wire is further moved to the lower edge side by the inclination of the extrusion surface.

  Therefore, if a part of the wire rod is on the inclined edge, it acts to push it back onto the mounting substrate from the lower end portion of the inclined edge portion, so that the elastic arm remains on the upper edge of the facing portion. There is no possibility that the wire rod is caught by the insertion into the locking hole.

The clamp according to claim 2 is the clamp according to claim 1,
Since the locking hole is rectangular and the low edge portion is provided on a side surface orthogonal to the facing portion, the effect of the configuration of claim 1 is further ensured.

  The clamp according to claim 3 is the clamp according to claim 2, wherein the low edge portion includes a corner portion formed between the facing portion and the side portion. Further ensure the effect.

Next, embodiments of the present invention will be described based on examples of the present invention. The present invention is not limited to the following examples and the like, and it goes without saying that the present invention can be implemented in various ways without departing from the gist of the present invention.
[Example]
The clamp 10 of this embodiment is a molded product of nylon 66, but other types of synthetic resins such as polyethylene, polypropylene, ABS, etc. can be used.

  FIG. 1 ((a) is a front view, (b) is a plan view, (c) is a left side view, (d) is a bottom view, (e) is a right side view, (f) is a rear view), FIG. (Front view, enlarged view (A, D), arrow view (C, E) and cross-sectional view), as shown in FIG. 3 (perspective view), the clamp 10 of this embodiment includes a belt portion 11, a belt portion. 11, the elastic arm 13 connected to the free end portion 11 b, the mounting base portion 15 connected to the fixed end portion 11 a of the band portion 11, the latch receiving portion 16 connected to the mounting base portion 15, and the back surface of the mounting base portion 15. A snap 19 (corresponding to the attaching means) and the like are provided.

  As will be described in detail later, the belt portion 11 is formed into an annular shape by locking the elastic arm 13 to the engagement receiving portion 16, and the clamp 10 is a wire rod such as an optical fiber or an electric wire at the annular belt portion 11. Used to grip. The band portion 11 is provided with a thin portion 11c in the vicinity of the fixed end portion 11a for facilitating bending deformation when the belt portion 11 is formed into an annular shape.

  The elastic arm 13 is substantially U-shaped, and is connected to the band portion 11 at one end of the U-shape. The other end portion of the elastic arm 13 is a half-bar-shaped knob portion 21, and a locking projection 22 is provided in parallel with this.

  The width of the U-shaped bottom portion 20 is narrower than the widths of both end portions (portions where the strip portion 11 is connected, the knob portion 21 and the locking projection 22), and the wide portion and the narrow portion. A portion connecting the first portion and the second portion is tapered, and one is an extrusion surface 23 and the other is a guide surface 24.

  Further, a stopper 25 having a substantially right-angled corner is provided at a portion adjacent to the extrusion surface 23, and an avoidance slope 26 is provided between the stopper 25 and the belt portion 11 as shown in FIG. ing.

As shown in FIGS. 1B and 1D, the outline of the attachment base 15 is substantially rectangular, and the fixed end 11 a of the band 11 described above is connected to one end thereof.
Further, a locking receiving portion 16 is connected to the other end portion of the mounting base portion 15. As shown in FIG. 1B, the planar projection contour of the latch receiving portion 16 is substantially rectangular, and a latch hole 30 having a rectangular cross section is provided therein.

  The peripheral wall 31 of the locking hole 30 is formed as a projection support portion 32, a guide side surface portion 33, a facing surface portion 34, and a low edge side surface portion 35 corresponding to each side of the rectangle, and the protrusion support portion 32, the facing surface portion 34, and the guide side surface. The portion 33 and the low edge side surface portion 35 are opposed to each other. The facing portion 34 faces the fixed end portion 11a.

On the inner surface of the protrusion support portion 32, a locking receiving protrusion 36 protruding toward the facing portion 34 is provided. The locking receiving projection 36 is provided to lock the locking projection 22.
The guide side surface 33 is provided with a guide surface 37 for guiding the elastic arm 13 in cooperation with the guide surface 24 of the elastic arm 13.

  The protrusion support portion 32, the guide side surface portion 33, and the facing portion 34 have the same protruding height from the mounting base 15, but the facing portion 34 is provided with an inclined edge portion 38 where the low edge side portion 35 is lowered. On the other hand, the protruding height of the low edge side surface portion 35 from the mounting base portion 15 is lower than that of the projection support portion 32, the guide side surface portion 33, and the facing portion 34. For this reason, the upper edge of the peripheral wall 31 extends from the lower edge of the high edge 39, the inclined edge 38, and the inclined edge 38 from the protrusion support portion 32 through the guide side surface 33 to the upper end of the inclined edge 38 of the facing portion 34. Divided into three low edges 40 across the low edge side 35.

A snap column 42 is connected to the back surface of the mounting base 15, and a pair of elastic support plates 43 extend obliquely downward from the connecting portion between the mounting base 15 and the snap column 42.
The tip 44 of the snap column 42 is plate-shaped, and the head 45 of the snap 19 is connected to the tip. A pair of elastic pieces 46 (the cross-sectional shape is a hook shape as shown in FIG. 2) extend obliquely upward from the head 45. The function of the snap 19 in cooperation with the elastic support plate 43 is well known.

  As shown in FIG. 4, the clamp 10 puts a wire rod (for example, an optical fiber F, which is one in the figure but may be plural) on the upper surface of the mounting base 15, and then tilts the belt 11. When the elastic arm 13 is pushed into the locking hole 30 of the locking receiving portion 16 by being deformed (see FIG. 4A), the elastic arm 13 is once elastically deformed by the reaction force exerted from the locking receiving projection 36, When the locking projection 22 gets over the locking receiving projection 36, the locking projection 22 is elastically restored and the locking projection 22 is locked to the locking receiving projection 36 (see FIG. 4B).

  As a result, a closed annular body is formed by the band portion 11 and the attachment base 15, and the optical fiber F is held by the closed annular body. If the clamp 10 is attached to a plate-like material such as a housing of an electronic device or a sheet metal of an automobile by the snap 19 (or if attached in advance), the optical fiber F can be attached to the plate-like material.

By the way, the optical fiber F placed on the attachment base 15 during this operation may get on the upper edge of the facing portion 34. The operation of the clamp 10 in such a case will be described with reference to FIG.
In this clamp 10, a part of the upper edge of the facing portion 34 of the peripheral wall 31 is an inclined edge 38, and the protruding height from the mounting base 15 on the lower end side of the inclined edge 38 is that of the inclined edge 38. A lower edge 40 lower than the upper end side is provided, and the elastic arm 13 is provided with an extrusion surface 23 that is inclined opposite to the inclined edge 38 when the elastic arm 13 is inserted into the locking hole, and the facing portion 34 at the time of insertion. It is provided in the part that passes through the inside.

  For this reason, if a part of the optical fiber F rides on the inclined edge 38 and passes over the locking hole 30 when the elastic arm 13 is inserted into the locking hole 30 (see FIG. 5A), The bottom 20 of the elastic arm 13 pushes the optical fiber F above the locking hole 30. Then, the optical fiber F is moved to the lower end side of the inclined edge 38 along the inclined edge 38 by the force received from the bottom 20. That is, the bottom 20 of the elastic arm 13 pushes the optical fiber F and enters the locking hole 30 (see FIG. 5B).

  The elastic arm 13 is provided with the push-out surface 23. If the push-in surface 23 comes into contact with the optical fiber F when the elastic arm 13 enters the locking hole 30 deeply, the push-out surface 23 is inclined. The optical fiber F is pushed away (see FIG. 5C).

  Therefore, if a part of the optical fiber F rides on the inclined edge portion 38, the optical fiber F acts to push it back onto the mounting substrate 15 from the lower end portion of the inclined edge portion 38. There is no possibility that the optical fiber F is caught by the insertion of the elastic arm 13 into the locking hole 30 while being on the upper edge.

  As shown in FIG. 4B, in the state where the locking projection 22 is locked to the locking receiving projection 36, the avoidance slope 26 approaches the inclined edge 38 and faces, and the stopper 25 is low. It approaches the edge 40 and enters a facing state. The stopper 25 is provided to restrict the pushing limit of the elastic arm 13 into the locking hole 30, and if it comes into contact with the low edge portion 40, the elastic arm 13 cannot be pushed further. Further, since the avoidance slope 26 is provided so as to be parallel to the sloped edge 38, the peripheral wall 31 does not hit the elastic arm 13 and does not hinder the pushing.

6 is a six-side view of the clamp according to the embodiment (a is a front view, b is a plan view, c is a left side view, d is a bottom view, e is a right side view, and f is a rear view). Structure explanatory drawing of the clamp of an Example. The perspective view of the clamp of an Example. Explanatory drawing of the usage method of the clamp of an Example. Explanatory drawing of the effect | action of the clamp of an Example.

Explanation of symbols

10 ... Clamp,
11 ... belt part
11a ... fixed end,
11b ... free end,
15 ... Mounting base,
16: Lock receiving part,
19 ... snap (attachment means),
20 ... bottom,
22 ... locking protrusion,
23 ... extruded surface,
25 ... stopper,
26 ... avoiding slope,
30 ... locking hole,
31 ... peripheral wall,
32 ... projection support part,
33 ... guide side part,
34 ... facing part,
35 ... low edge side surface,
36... Locking receiving projection,
38 ... inclined edge,
39 ... High edge,
40 ... Low edge,
F: Optical fiber.

Claims (3)

An attachment base to which attachment means for attaching to the plate-like material are connected,
One end is connected to the mounting base as a fixed end, and the other end, which is a free end, is connected to an elastic arm having a locking projection,
A locking hole that elastically deforms and receives the elastic arm, and a locking receiving protrusion that protrudes inward from a peripheral wall of the locking hole to lock the locking protrusion, are connected to the mounting base. A latch receiving portion to be
The elastic arm is inserted into the locking hole to be elastically deformed, and the locking protrusion is locked to the locking receiving protrusion by the repulsive force of the elastic deformation, whereby the wire member is formed into an annular body. In the clamp that is attached to the plate-like material by the attachment means,
A part of the upper edge of the facing portion facing the fixed end portion of the peripheral wall is an inclined edge portion, and a protruding height from the mounting base on the lower end side of the inclined edge portion is higher than that on the upper end side of the inclined edge portion. Providing a low low edge,
The elastic arm is provided with an extrusion surface that is inclined opposite to the inclined edge when the elastic arm is inserted into the locking hole, in a portion that passes through the inside of the facing portion during the insertion ,
The elastic arm is formed with a thick portion including an avoiding slope that approaches the inclined edge portion and faces the inclined edge portion when the locking projection is locked to the locking receiving projection,
The thick portion is formed with an inclination at an end which is on the low edge side in a state where the engaging protrusion is engaged with the engaging receiving protrusion, A clamp characterized by being formed so as to be as thin as possible . The clamp of claim 1,
The locking hole is rectangular,
The clamp characterized by the said low edge part being provided in the side part orthogonal to the said facing part. The clamp according to claim 2, wherein
The said low edge part contains the corner part formed between the said facing part and the said side part, The clamp characterized by the above-mentioned.

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