JPH0211678Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention is suitable for wiring electric wires, telephone lines, optical fibers, and other cables inside and outside buildings.
When installing cladding tubes to cover the above-mentioned electric wires, etc. inside or outside of floors, ceilings, etc. as a preliminary work,
The present invention relates to a connecting fixture used for connecting and fixing the end of the cladding tube to a fixed object such as an outlet box or a distribution box.

<Prior Art> A conventional tube end connecting fixture of this kind for a cladding tube has a protrusion 20 on the inner peripheral surface of a through hole 3a of a fixture main body 3, as shown in FIGS. 8 and 9. A fixture (the one shown in FIG. 8) that connects the cladding tube 1 by protruding from the concave groove portion 1a formed on the outer circumferential surface of the cladding tube 1, and an end protrusion of the fixture body 3. A separately formed split ring 22 is fitted onto the portion 21, and a protrusion 23 formed protruding from the inner surface of the split ring 22 is fitted into the concave groove portion 1a of the cladding tube 1, thereby forming a cladding tube. There was a fixture (shown in Figure 9) that connects 1.

<Problems to be solved by the invention> However, in all of these, as is clear from the above two figures, the nut 6 as a tightening body for fixing to a fixed object 2 such as a wiring box is usually The through hole 3a of the fixture main body 3 is a square nut, and after the fixture main body 3 is fixed to a fixed object 2 such as a wiring box,
When attempting to insert electric wires etc. after completion of construction work on a building, etc., there is a drawback that dust gets into the through hole 3a or through the hole and enters the cladding pipe, causing trouble in the wiring work.

Therefore, in order to prevent such problems from occurring, the inventor of the present invention came up with the idea of manufacturing and using a lid that fits into the opening at the end of the fixture main body 3. However, manufacturing and using the lid as a separate component not only results in an additional component, which poses a problem in terms of cost, and if the fit is loose, it may fall off and be lost during transportation or handling. In addition, if the fitting is hard, it is difficult to remove it during wiring.Furthermore, when the fixing device body 3 is attached to the fixed object 2, the nut 6 is screwed. It also has the disadvantage that it obstructs the removal and screw-fitting work.

<Means for solving the problems> Therefore, the present invention proposes a pipe end connecting fixture for a cladding pipe that can solve these shortcomings all at once, and its configuration is as follows. .
That is, the present invention, as a means to solve the above-mentioned drawbacks, connects the end portions of cladding tubes having corrugated irregularities on the outer periphery at one end, and drills the other end into a fixed object such as a wiring box. A tube end connecting fixture for a cladding tube that is inserted through a provided fixing hole and clamped and fixed, the clamping and fixing clamp being screwed onto the end of the fixture body on the side fixed to the fixing object. A hole closing body that closes the hole on the fixing side of the fixing device main body via a plurality of small connecting parts at an outer end position of the attachment body, and a hole closing body that closes the hole on the fixed side of the fixing device body at an outer end position thereof, and an outer surface side of the attachment body at a position near the outer periphery of one side of the hole closing body. It has a structure in which a protruding removal knob is integrally connected.

<Function> To connect and fix this fixture to a fixed object such as a wiring box, unscrew the clamping body that has been temporarily screwed onto the fixture body, and then attach the fixture body to the fixed object. The fixing body is inserted into the fixing hole formed in the fixture body, and the clamping body is again screwed into the fixture body with the fixing object in between, and both are tightened. At this time, the hole closing body integrally connected to the clamping body automatically closes the hole of the fixture main body at the outer end position of the clamping body.

If you want to carry out wiring work etc. later in this state, use pliers or other necessary tools as explained in the next example to hold the removal knob and tighten the clamping body and the hole closing body. Removal by breaking or tearing off the connecting small connections.

<Example> The structure of the embodiment will be explained below with reference to the drawings.

(First Embodiment) FIGS. 1 to 4 show a tube end connecting fixture for a cladding tube, which shows the structure of a first embodiment. As shown in FIG. 2, the fixture engages with a fixture body 3 and an inner surface protrusion 3d protruding from the inner peripheral surface of the hole 3a at one end (lower side in the figure) of the fixture body 3. a connector 4 that connects the tube end portion of the cladding tube 1 to the fixture body 3;
A female screw portion 6 that screws into a male screw 3b formed on the outer peripheral surface of the other end (upper side in the figure) of the fixture main body 3
It is made up of three members: a nut 6 as a tightening body having a diameter e; On the outer end of the nut 6, there are three small and thin connecting parts 6 as shown in
A disk-shaped hole closing body 6b is formed to cover substantially the entire surface of the hole of the nut 6 through a..., and the fixed side of the fixture main body 3 is formed on the inner surface side (lower side in FIGS. 3 and 4) of the hole closing body 6b. An annular portion 6d having approximately the same diameter as the inner circumferential surface of the hole 3c of the end portion 3' is integrally formed to protrude (in FIG. 2, the annular portion 6d is omitted for convenience of drawing), On the outer surface side (upper side in FIGS. 3 and 4), a knob 6c is formed protruding near the outer periphery of one side of the disc-shaped hole closing body 6b.

The cladding tube 1 is then fixed using the fixing device having the above structure.
In order to connect and fix the connector 4 to the fixed object 2, as shown in FIG. 4a, and the spiral protrusion 4e formed protruding from the outer circumferential surface 4b is screwed into the inner protrusion 3d of the fixing device body 3 to form the vertical split cut 7a. The tube end portion 1' of the cladding tube 1 is inserted and fixed into the fixture main body 3 using the deformation effect of the lateral split cuts 7b and 7b. In the figure, 4c indicates a large-diameter stopper portion of the connector 4. Next, the nut 6 temporarily screwed in the state shown in FIG. It is inserted into the fixing hole 2' from the outside toward the inside (upward in FIG. 4), and the removed nut 6 is screwed into the male threaded portion 3b from the inside and tightened. At this time, the hole closing body 6b automatically closes the hole 3c in the fixed end 3' of the fixture main body 3, as shown in FIG.

In this way, when inserting and wiring an electric wire etc. into the cladding tube 1 fixed to the electric wire case etc. via a fixture, it is possible to tighten the grip part 6c with a gripping tool such as pliers or pliers and pull it. Thin connecting part 6a
... is torn to pieces, and the hole 3c in the fixed end 3' of the fixture body 3 can be easily opened.

(Second Embodiment) The embodiment shown in FIGS. 5 and 6 is similar to the first embodiment described above.
In the pipe end connecting fixture having the structure shown in the example, the disc-shaped hole closing body 6b, which is integrally formed and connected to the outer end side of the nut 6, is formed at a position that projects slightly outward. It is something. That is, in the structure of the first embodiment, as shown in FIGS. 3 and 4, the outer peripheral edge of the hole closing body 6b is formed at a position where the nut 6 is slightly inserted into the outer end surface 6f, and the connection is made. Part 6
a... was set to be the shortest, but in this embodiment, the connecting portion 6a... was made to protrude slightly outward, and the hole closing body 6
The position of b is closer to the space S than the outer end surface 6f of the nut 6.
The structure is such that it is located at a position that is outwardly separated by the amount of time.

Therefore, as shown in FIG. 6, when removing the hole closing body 6b after being fixed to the fixed object 2 such as a wire cover,
By inserting a protruding object such as a screwdriver into the space S and pinching it, the connecting portion 6a... can be easily cut into pieces.
The hole blocker 6b can be removed.

(Third Embodiment) The embodiment shown in FIG. 7 relates to an internally threaded fixture, in which a connecting portion 6a is provided on the outer end side of the opening of a fastening body 6 having a male thread formed on the outer periphery of the tip. This figure shows a structure in which the hole closing body 6b is integrally formed with the tightening body 6 through the hole closing body 6b. In this case as well, by inserting the tip of a tool such as a screwdriver into the space S and pinching it,
The hole blocker 6b can be removed. but,
It goes without saying that the hole closing body 6b may be formed at substantially the same height as the outer end surface 6f of the clamping body 6, as in the case of the first embodiment.

(Other Examples) In the hole closing body 6b of the embodiment shown in the first embodiment and the second embodiment, an annular portion 6d integrally formed to protrude toward the inner surface is fixed to the fixture main body 3. If the structure is such that it fits slightly firmly into the hole 3c of the side end 3', then the structure shown in FIGS.
When the nut 6 is temporarily screwed into the fixture main body 3 as shown in the figure, the annular portion 6d can be stably fixed to the fixture main body 3, so that the nut 6 can be prevented from rotating. , it is possible to prevent the nut 6 from loosening, falling, or being lost. Thus, the relationship between the annular portion 6d and the hole 3c is formed to be a relative relationship that can be fixed even more firmly, that is, near the final stage of screwing the nut 6 into the fixing device main body 3 when temporarily screwing,
If the nut 6 is formed in such a way that it is difficult to penetrate further, the friction between the two will prevent the nut 6 from rotating in the final rotation of the temporary screw-fit, or when the nut 6 is rotated in the opposite direction when attached to a wire holder, etc. Therefore, since the connecting portions 6a can be cut, the hole closing body 6b can be simply removed from the hole 3c during wiring work such as electric wires.

The tightening body 6 and hole closing body 6b described in the above embodiments can be easily manufactured by integrally molding them from a synthetic resin material.

<Effects of the Invention> As explained in the embodiments above, the present invention has a hole closing body that closes the hole of the fixture body on the outer end side of the tightening body that is screwed into the fixture body. Since it is integrally formed through the hole of the fixing device, after the cladding tube of the electric wire etc. is connected and fixed to a fixed object such as a wiring box (outlet box) or a distribution box, there is no possibility of dust etc. falling onto the hole of the fixing device or getting into it. Even if an attempt is made to do so, it is blocked by the hole closing body, so that the fixture and the inside of the corrugated pipe are protected from dust until the wiring work is completed, and it is possible to reliably prevent any trouble from occurring during the wiring work. In addition, the tightening body (nut) can be easily attached and detached without any problems as in the case of conventional ones, and there is no need to lose the hole closing body or manufacture it as a separate member, which is a practical advantage. Has a remarkable effect.

Moreover, in the case of the present invention, the connecting portion between the hole closing body and the fixing device main body is not formed over the entire circumference of the hole closing body, but is formed as a small and narrow partial connection. There is no need to cut out the surface, and it can be easily removed by tearing means, and furthermore, a removal knob protruding outward is integrally formed near the outer periphery of one side of the upper hole closing body. Since it is made of a solid material, it also has the effect that the removal operation of the hole closing body can be easily performed without requiring a large amount of force.

[Brief explanation of the drawing]

Figures 1 to 4 are views showing the first embodiment, with Figure 1 being an upper perspective view of the tightening body, Figure 2 being an exploded perspective view of all the parts, and Figure 3 being a vertical cross-sectional front view showing the assembled state. figure,
FIG. 4 is a longitudinal sectional view showing the state of fixing to a fixed object, FIGS. 5 and 6 are longitudinal sectional front views showing the second embodiment in an assembled state and a state of fixing to a fixed object, respectively. FIG. A longitudinal sectional front view showing a state in which the third embodiment is fixed to a fixed object, and FIGS. 8 and 9 are partially cutaway front views of the conventional product, respectively. In the figure, 1 is a cladding tube, 1' is a tube end portion, 2 is a fixed object,
2' is a fixing hole, 3 is a fixture main body, 3' is a fixed side end, 3c is a hole, 6 is a tightening body, 6a is a connecting part, 6b
indicates a pore blocker.

Claims (1)

[Claims for Utility Model Registration] A pipe end portion 1' of a cladding tube 1 having corrugated irregularities on the outer periphery is connected at one end, and the other end is fixed to a fixed object 2 such as a wiring box. A pipe end connecting fixture for a cladding tube which is inserted into a hole 2' and clamped and fixed, and a fixture for clamping and fixing which is screwed onto the end 3' of the fixture main body 3 on the fixed side to the fixed object 2. A hole closing body 6b that closes the fixing side hole 3c of the fixing device main body 3 through a plurality of small connecting portions 6a at the outer end side of the tightening body 6, and one side of the hole closing body 6b. A tube end connecting fixture for a cladding tube having a structure in which a removal knob 6c protruding from the outer surface at a position near the outer periphery is integrally connected. A tube end connecting fixture for a cladding tube according to claim 1, wherein the clamping body 6 is of an internally threaded type. A tube end connecting fixture for a cladding tube according to claim 1, wherein the clamping body 6 is of an externally threaded type. The hole closing body 6b has an annular portion 6d for fitting into the hole 3c on the fixed side of the fixture main body 3, which protrudes toward the inner surface thereof.
A tube end connecting fixture for a cladding tube according to claim 1 of the utility model registration claim, which has a structure having the following.