JPH0424930B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing jig for a long object, which is used, for example, to fix an electric cable connected to an electric wiring box such as a switch box or a pool box.

As an example of this kind of long cable fixing jig, as shown in Fig. 6,
A nut 5 that can be attached and detached in the longitudinal direction of the electric cable 1 is screwed onto the main body 2, which has an insertion hole 2a for the electric cable 1 and a male threaded part 2b for attaching to another object. A cylindrical rubber 8 is interposed between the cylindrical member 6 that is engaged and held by the cylindrical member 6 and a stepped portion formed on the inner circumferential surface of the main body 1, so that the cylindrical member 6 and the cylindrical member are connected to each other by the screwing operation of the nut 5. By compressing the cylindrical rubber 8 as it moves relatively close to the shaped member 6,
There is a structure in which the cylindrical rubber 8 is brought into pressure contact with the outer peripheral surface of the electric cable 1 to clamp and fix the electric cable 1.

In the case of using the above-mentioned conventional fixing jig, when the tightening force of the cylindrical rubber 8 by the nut 5 is increased, the clamping force of the electric cable 1, that is, the cylindrical rubber 3
Although the frictional force between the cylindrical rubber 8 and the electric cable 1 can be increased, since the contact area between the cylindrical rubber 8 and the electric cable 1 is small, stress concentration at this contact area causes an annular recess in the electric cable 1. In addition to causing damage, the life of the cylindrical rubber 8 is significantly shortened due to the large compressive force constantly acting on the cylindrical rubber 8.

Further, by weakening the tightening force of the cylindrical rubber 8 by the nut 5, it is possible to suppress damage to the electric cable 1 and extend the life of the cylindrical rubber 8.
Since the frictional force between the cylindrical rubber 8 and the electric cable 1 is reduced, when a tensile force is applied to the electric cable 1, the electric cable 1 will shift and move without limit with respect to the main body 2, causing problems such as disconnection. There is a problem that leads to

In order to eliminate this inconvenience, for example, it may be considered to sufficiently enlarge the fitting range of the cylindrical rubber 8 to the electric cable 1 to increase the contact area between the cylindrical rubber 8 and the electric cable 1. Although this is possible, the holding portion on the main body 2 side that fits and holds the cylindrical rubber 8 must have an extremely large structure, which is impractical.

An object of the present invention is to enable a long object to be strongly attached to a main body to which the long object is attached while having a sufficient contact area without making the holding part on the main body unnecessarily large. The purpose is to provide a fixing jig for

The characteristic structure of the fixing jig for long objects according to the present invention, which was taken to achieve the above object, is that the main body has an insertion hole for the long object and a part for attaching to another object. , one end side of a clamping body that can be fitted over an appropriate length of the elongated object is fixedly connected, and the other end side of the clamping body is configured to be fixable to the outer peripheral surface of the elongated object, and , the holding body is constructed of a spiral flexible wire wound around the axis of the elongated object.

The functions and effects of the above characteristic configuration are as follows.

In other words, a clamping body attached between a long object such as an electric cable and the main body can cause the spiral flexible wire material to move in the axial direction of the long object due to the tensile force acting on the long object. It is pulled and subjected to twisting action,
The diameter of the spiral is bent and deformed so that the stronger the pulling force, the smaller the diameter.

Therefore, for the main body to be installed,
Although it is only for fixing one end,
The clamping action of the flexible wire can be applied to a long object over a wide range in the length direction of the holding body. Moreover, even when compared to a structure in which the clamping body is made of a rubber cylindrical member that undergoes bulk elastic deformation, as shown as a comparative example in FIG. Since the diameter does not change with changes in the cylinder wall thickness, it is possible to increase the ratio of change in the diameter of the helix to the change in elongation in the axial direction of the holding body. In other words, if a tensile force is applied to a long object and the clamping body stretches, the diameter of the clamping body immediately changes, reducing the displacement of the long object and reducing the tensile resistance of the clamping body. can be given. As a result, although it is small and simple in terms of structure, it makes contact with long objects over a wide contact area, suppresses movement of the object beyond a certain level, and helps avoid troubles such as wire breakage. be.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 to 3, a fixing jig used for fixing an electric cable 1, which is an example of a long object, to an electric wiring box B of a movable device A includes: 1 having an insertion hole 2a, and a male threaded portion for attachment to the electrical wiring box B (this is an example of a portion for attachment to another object) 2
b, the electric cable 1 can be fitted over an appropriate length corresponding to multiple times the axial length of the main body 2, and has a tensile force in the direction away from the main body 2. At the same time, one end side of the clamping body 3 is attached, which shrinks in diameter when the electric cable 1 is applied, and tightly adheres to the outer circumferential surface of the electric cable 1, and the other end side of the clamping body 3 is attached to the outer circumference of the electric cable 1 via the clamping fixture 4. fixed to the surface.

The holding body 3 is constructed by knitting a plurality of wires 3a, which are an example of a spiral flexible wire material, into a mesh-like and cylindrical shape. Moreover, this clamping body 3
is in a smaller constricted state than the electric cable 1 at the time of knitting, and is configured to expand in diameter as it is fitted into the electric cable 1.

Furthermore, a nut 5 which can be freely attached and detached in the longitudinal direction of the electric cable 1 is screwed into another male threaded part 2d of the main body 2, which is connected to the male threaded part 2b via the tool operating hexagonal part 2c. In the nut 5, a cylindrical member 6 is engaged and held, which has a locking groove 6a for the stopper 3b fixed to the end of the wire 3a of the clamping body 3. A pair of washers 7, 7 and a cylindrical rubber 8 are interposed between the stepped portion formed on the inner circumferential surface of the main body 2, and the main body 2 and the cylindrical member are screwed together with the nut 5. By compressing the cylindrical rubber 8 as it moves relatively close to the electric cable 6, the cylindrical rubber 8 is brought into pressure contact with the outer circumferential surface of the electric cable 1, and the electric cable 1 is clamped and held. In other words, the main body 2 has the function of holding the electric cable 1 in place.

The clamping fixture 4 is composed of a band 4a curved in an annular shape and an operating tool 4b for operating the band 4a to increase or decrease its diameter.

Next, another example will be listed.

(a) As shown in FIG. 4, the holding body 3 is composed of a plurality of coil springs that can contract in diameter when a tensile force in a direction away from the main body 2 is applied.

(b) As a means for fixing the other end of the holding body 3 to the outer circumferential surface of the elongated object 1, a holding fixture having a structure other than the above embodiment may be used, or an adhesive or the like may be used. It's okay.

(c) As the main body 2, one that does not have the function of holding and holding the long object 1 is used.

(d) The technology of the present invention is applied to a fixing jig for other long objects 1 such as optical fibers.

[Brief explanation of drawings]

1 to 3 show an embodiment of the fixing jig for long objects according to the present invention, FIG. 1 is a schematic front view showing an example of use, and FIGS. 2 and 3 are diagrams of the fixing jig. They are a front view and an enlarged sectional view of important parts. FIG. 4 is a front view showing another embodiment, FIG. 5 is a front view showing a comparative example, and FIG. 6 is an enlarged sectional view showing a conventional fixing jig. 1...Long object, 2...Main body, 2a...Insertion hole,
2b... Attachment part, 3... Clamping body, 3a... Flexible wire material.

Claims (1)

[Scope of Claims] 1. The elongated object 1 can be fitted over an appropriate length into the main body 2, which has an insertion hole 2a and a part 2b for attachment to another object. One end side of the clamping body 3 is fixedly connected, and the other end side of the clamping body 3 is configured to be fixable to the outer circumferential surface of the elongated object 1; A fixing jig for a long object, which is composed of a spiral flexible wire 3a wound around the axis of the long object. 2. The fixing jig for a long object according to claim 1, wherein the main body 2 has a function of holding and holding the long object 1. 3. Fixing for a long object according to claim 1 or 2, wherein the holding body 3 has a mesh-like and cylindrical shape with a plurality of flexible wires 3a... jig. 4. The elongated object fixing device according to claim 1 or 2, wherein the holding body 3 is a coil spring. 5. The fixing jig for a long object according to claim 3, wherein the flexible wire is a wire.