JPH0129014Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an opening fitting device for an electric wire protection tube for sequentially closing fasteners provided in a slit portion of the electric wire protection tube in the longitudinal direction.

BACKGROUND ART Conventionally, for the purpose of protecting or reinforcing electric wires, a protective tube has been placed around the outer periphery of electric wires.

As a conventional example of such a protection tube, one having a structure shown in FIG. 1 is known.

This protective tube P is generally made of a material such as plastic, and has a slit (opening section) S formed in a part of its cylindrical side wall along its entire length. A fastener F consisting of an engaging protrusion Fa and an engaging groove Fb is provided on the mating surface of the slit S.

In order to cover the outer circumference of the electric wire C with this protective tube P, first widen the protective tube P so that the width of the slit S is almost the same as the outer diameter of the electric wire C, and then protect the protective tube from the opening of the slit S. The tube P is placed over the outer periphery of the electric wire C, and then a pressing force is applied to the circumferential wall of the protective tube P so as to narrow the opening of the slit S, that is, so that the fastener F is closed together.
Fa and the engagement groove Fb are fitted sequentially in the length direction (see Fig. 2).

However, conventionally, the above-mentioned engagement protrusion Fa and engagement groove
Since workers manually close the fastener F that fits the Fb, the workability and efficiency are poor, and the work is not very skillful, resulting in poor attachment to the wire. There were problems such as stability in some cases.

This invention provides an opening fitting device for a wire protection tube that can easily and reliably perform the aforementioned fastener closing operation on the wire protection tube.

An embodiment of this invention is shown below in Figures 3 to 9.
This will be explained with reference to the figures.

As shown in FIG. 3, the opening fitting device of this embodiment includes a casing 1 into which a protective tube P is inserted;
The rotating body 2 is rotatably installed in the casing 1 with the longitudinal direction as the axis of rotation and into which the protective tube P is inserted.The protective tube P is inserted into a part of the peripheral wall of the casing 1. An insertion port 1a is formed at both ends of the casing 1 for the protection tube P inserted into the casing 1. The rotating body 2 is formed with a fitting groove into which the protective tube P is fitted, and the fitting groove 5 is formed with a semicircular guide portion a that contacts the outer wall of the protective tube P. The basic structure is such that the base end of the operating rod 6, which extends outwardly through the casing 1, is fixed to the wall of the rotating body 2.

Furthermore, if these details are explained with reference to FIGS. 4 to 6, a support hole 7 extending in the length direction is formed inside the casing 1,
The support hole 7 communicates with the insertion opening 1a formed in the side of the casing 1 over its entire length. Further, a through hole 8 is formed in a part of the side wall of the casing 1 on the side opposite to the insertion opening 1a, and extends almost all the way in the circumferential direction. (See Figure 5). Furthermore, the casing 1
Guide plates 9, 10 are fixed to both ends of the inlet 1a by bolts B, B, respectively. The guide groove 11,1 has a width of
2 are formed respectively, and semicircular arc-shaped guide portions 3 and 4 are formed in these guide grooves 11 and 12 so as to be concentric with the support hole 7.

Further, the rotary body 2 is formed to have an outer diameter slightly smaller than the inner diameter of the support hole 7, and is rotatably supported within the support hole 7 with its own length direction being the axis of rotation. . The fitting groove 5 formed in the rotary body 2 is formed to have a width substantially equal to the width of the insertion opening 1a and the guide grooves 11 and 12, and the guide portion 5 of the fitting groove 5
a is concentric with the guide portions 3 and 4 of the casing 1. Further, a screw hole 13 is formed in the wall surface of the rotating body 2 at a position facing the through hole 8, and the base end of the operating rod 6 extending outwardly through the through hole 8 is connected to the screw hole. 13 and is screwed and fixed. This operating rod 6 is connected to the through hole 8.
When positioned at one end, the opening of the fitting groove 5 is aligned with the insertion opening 1a of the casing 1, as shown in FIG. When rotated to the other end, as the operating rod 6 moves, the rotating body 2
rotates, and as shown in FIG. A perfect circle with a diameter approximately equal to the outer diameter is formed.

Furthermore, in this embodiment, protrusions 3a and 4a are formed on the inner circumference of the guide parts 3 and 4, and protrusions 5b, 5c, and 5d are formed at both ends and in the middle of the inner circumference of the guide part 5a of the rotating body 2. is formed. Furthermore, the protrusions 3a and 5b on one side are connected to the protrusions 4 on the other side.
It is formed with an inner diameter slightly larger than that of a, 5c, and 5d (see Fig. 3).

Next, the method of using the aperture fitting device of the illustrated embodiment will be explained as follows.

First, as shown in FIG. 7, a wire protection tube P is placed over the outer periphery of the wire C. Further, the opening of the fitting groove 5 of the rotating body 2 and the insertion opening 1a of the casing 1 are made to coincide with each other by rotating the operating rod 6 of the opening split fitting device according to the present invention. Next, after inserting the wire protection tube P into this opening fitting device (see Fig. 8),
The operating rod 6 is rotated again to rotate the rotating body 2 so that the guide portions 3, 4, and 5a are brought into contact with each other over the entire outer circumference of the wire protection tube P (see FIG. 9).

During the process of such operations, at the time when the wire protection tube P is fitted into the fitting groove 5 or when the rotating body 2 is rotated, a pressing force in the circumferential direction is applied to the wire protection tube P. Then, the fastener F is closed. Especially at the latter point, the entire circumference of the wire protection tube P is restrained by the guide portions 3, 4, and 5a, so that reliable closing is achieved.

Next, when the opening split fitting device is moved along the length direction of the wire protection tube P, the fasteners F are sequentially closed in the length direction, and as a result,
The wire protection tube P is formed into a complete tubular body over its entire length.

In this embodiment, as described above, the guide portions 3, 4 and 5a have protrusions 3a, 4a, 5b,
5c, 5d, and protrusions 3a, 5 on one side.
Since b has a slightly larger inner diameter, when moving this in the length direction of the wire protection tube P, the friction between the guide parts 3, 4, 5a and the wire protection tube P is reduced to make the movement smoother. . In addition, communication between the closed portion and the open portion of the fastener F is made smooth, thereby facilitating the closing action of the fastener F.

On the other hand, in order to remove the proposed device from the wire after the fastener F has been closed, rotate the operating rod 6 in the opposite direction to the above-mentioned direction to open the fitting groove 5 of the rotating body 2 and open the casing 1. What is necessary is to match the insertion opening 1a, and then remove and move the present device in the radial direction of the wire.

Note that between the casing 1 and the rotating body 2,
As shown in FIG. 10, a recess 14 formed in the outer wall of the rotating body 2 and a ball 15 fitted into the recess 14
A locking mechanism 17 consisting of a compression spring 16 provided in the casing 1 to press the ball 15 against the outer wall of the rotating body 2 may be provided. This locking mechanism 1
7, the rotating body 2 can be temporarily fixed in the position shown in FIGS. 8 and 9, thereby facilitating the operation of the present instrument.

Further, the holes 18 for inserting the bolts B provided in the guide plates 9, 10 are formed into elongated holes as shown in FIG. 11, so that the positions of the guide plates 9, 10 and the casing 1 can be adjusted. It's okay. By having such a configuration, the guide parts 3, 4 and the guide part 5 can be
It becomes possible to finely adjust the perfect circle formed by a in response to variations in the outer diameter of the wire protection tube P.

As explained above, according to the electric wire protection pipe opening fitting device according to the present invention, the casing 1 and the rotating body 2, which are relatively rotatable in the circumferential direction, are inserted into the insertion opening 1a and the fitting groove 5 to protect the electric wire. The rotating body 2 is attached to the outer circumference of the pipe P, and then the rotating body 2 is rotated relative to the casing 1 in the circumferential direction to restrain the entire circumference of the wire protection pipe P by both of them, and while this state is maintained, the casing 1 and the rotating body are rotated. By moving the body 2 linearly along the length of the wire protection tube P, the fastener F of the wire protection tube P can be quickly, reliably, and easily closed over the entire length, and therefore the wire It is possible to significantly improve the workability and work efficiency of installing the protective tube.

[Brief explanation of drawings]

Figures 1 and 2 show an example of a wire protection tube. Figure 1 is an external perspective view, Figure 2 is a longitudinal cross-sectional view showing the wire protection tube covered with the wire, and Figures 3 to 3 show an example of the wire protection tube. Fig. 6 shows an embodiment of this invention, Fig. 3 is a vertical sectional side view showing a schematic configuration, Fig. 4 is an exploded perspective view, and Fig. 5 is a sectional view taken along the line - in Fig. 3. , Fig. 6 is a diagram similar to Fig. 5 showing the state in which the rotating body is rotated, Figs. 7 to 9 are explanatory diagrams of the operation, and Fig. 7 shows the state in which the electric wire is covered with the electric wire protection tube. A vertical cross-sectional view, FIG. 8 is a view similar to FIG. 5 showing the device of the present invention mounted on electric wires and a wire protection pipe, and FIG. 9 is a view similar to FIG. 6 showing a state in which the rotating body is rotated. Fig. 10 shows an example in which a locking mechanism is provided between the casing and the rotating body, and is a sectional view taken along the - line in Fig. 3, and Fig. 11 shows a guide plate of one embodiment. This is a view taken along the line XI-XI in FIG. 3, showing a modification of the above. P... Wire protection tube, S... Slit, F... Fastener, Fa... Engaging protrusion, Fb... Engaging groove, C
...Wire, 1...Casing, 1a...Insertion port,
2...Rotating body, 3...Guide portion, 3a...Protrusion,
4... Guide portion, 4a... Projection, 5... Fitting groove,
5a...Guide part, 5b, 5c, 5d...Protrusion,
6... Operating rod, 7... Support hole, 8... Through hole,
9, 10... Guide plate, 11, 12... Guide groove, 1
4... recess, 15... ball, 16... compression spring, 1
7... Locking mechanism, 18... Hole.

Claims (1)

[Scope of utility model registration request] An opening split of a wire protection tube P having a slit S along the length and a fastener F provided on the mating surface of the slit, and the fastener F being closed by applying a pressing force in the circumferential direction. The fitting device includes a casing 1 having an insertion port 1a into which the electric wire protection tube is inserted, and a casing 1 which is rotatably mounted in the casing with the longitudinal direction as a rotation axis and into which the electric wire protection tube is fitted. a rotating body 2 having a fitting groove 5, and semicircular guide portions 3 at both ends of the casing that are continuous with the insertion port and contact the outer wall of the wire protection tube inserted into the casing; 4 is formed, and a semicircular guide portion 5a that is continuous with the fitting groove and comes into contact with the outer wall of the wire protection tube is formed on the rotating body, and the rotation of the rotating body causes the casing to open. 1. An opening split fitting device for a wire protection tube, characterized in that the guide portion and the guide portion of the rotating body are configured to restrain the outer wall of the wire protection tube over the entire circumference.