JPH0122350Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a buried type conduit terminal protector that remains buried without being removed even after concrete is poured and cured. The present invention relates to a buried type conduit end protector, characterized in that a coupling, which is a conduit connector, is integrally assembled to the protector body.

(Prior Art) Conventionally, a conduit protection device is known from Japanese Utility Model Publication No. 57-31606, which has an insertion part into which a coupling ring connected to the terminal of a buried conduit is inserted (Fig. 10). and Figure 11). This thing is
It corresponds to the inner diameter of the cylindrical coupling 21 that connects the electrical conduit C-1 buried in the slab and another electrical conduit C-2 that will be piped to a lighting fixture in the future, and is inserted into this coupling 21 in advance. Insert fitting part 22 to be fitted
and a cylindrical base part 23 larger than this insertion part 22 are formed so as to be integrally connected in the axial direction, and the lower surface of this base part 23 is cut obliquely to form a beveled surface that can be closely attached to the curtain plate B. 24 and further formed with a concave surface 25 that comes into contact with the outer circumferential surface of the coupling ring 21 to sandwich the coupling ring 21, the coupling clamping part 26 is connected integrally from the base part 23 with the legs 27 on the front surface and lower left and right sides of the coupling clamping part 26. It is characterized by being formed in However, since this device has a structure in which the insertion part 22 is inserted into the inner diameter of the coupling ring 21, the conduit protection device 20 must be removed before connecting another conduit C-2. It won't happen. Therefore, the piping work to connect the next electric conduit C-2 is troublesome. In addition, in this case, depending on the impact during concrete pouring, the area around the beveled surface 24 may bend inward, forming an undercut-like shape, making it difficult to remove the conduit protection device after concrete pouring and curing. There will be cases where this is not possible.

Furthermore, conventionally, Japanese Utility Model Application Publication No. 57-36721 discloses a structure in which the terminal end of a conduit buried in concrete is held in a terminal holding cylinder and connected to a pedestal formed integrally with or separately from the terminal holding cylinder. ing. In this case, it is possible to perform piping work without removing the pedestal.

However, in this case, the terminal holding cylinder and the pedestal can be connected by screwing the male thread formed at the end of the terminal holding cylinder into the screw hole formed in the pedestal, or by inserting the male thread formed at the end of the terminal holding cylinder into the fitting hole formed in the pedestal. An annular protrusion formed on the outer periphery of the end of the terminal holding cylinder is press-fitted, and the terminal holding cylinder easily loosens due to rotation.
Twisting occurs in the conduit tube held in the terminal holding tube,
As a result, the conduits meander, making it impossible to pass through the conduit, and when concrete is poured, there are areas where the meandering conduits are covered with concrete, weakening the strength of the concrete structure. It was hot. Further, the rotation of the electrical conduit held by the terminal holding tube sometimes causes the terminal holding tube to loosen, causing the problem that the terminal holding tube comes off from the pedestal.

(Purpose) The present invention was developed in view of the above circumstances, and it is designed to firmly attach the coupling ring connected to the end of the conduit to the main body of the protective equipment without rotating it.
A buried type electric wire that reliably prevents the coupling ring from coming loose from the body of the protective equipment, twisting the conduit due to the rotation of the coupling, and preventing the coupling from loosening and falling from the body of the protective equipment. The present invention provides a tube end protector.

(Structure) The conduit end protector in the present invention has a coupling to which the conduit is connected, an insertion part that matches the outer shape of the coupling, an insertion part through which the coupling is inserted, and a protector connected to the insertion part. The end of the coupling has a bulge with a claw that locks the conduit, and the insertion part of the protector body has a recess that locks the bulge. It is characterized by being assembled to the main body of the protective equipment in a non-rotating manner.

As described above, in the conduit end protector of the present invention, the bulge portion provided with the claw for locking the conduit formed at the end of the coupling ring is attached to the conduit end protector formed at the insertion portion of the protector body. By inserting the coupling into the recess, the coupling is assembled to the main body of the protector in a non-rotating manner, so the coupling does not rotate and twist the conduit, or the coupling becomes loose due to rotation of the conduit. do not have.

The present invention will be described below with reference to embodiments shown in the drawings.

In the figure, 1 is the main body of the protective equipment, and 2 is a coupling.

As shown in FIG. 5, the coupling ring 2 has a protrusion 11 formed at its end, and a locking claw 12 that projects inwardly. The locking pawl 12 bites into the outer peripheral surface of the wire tube 13, so that the electric conduit 13 is locked.

3 is an insertion part through which one end of the coupling ring 2 is inserted;
A recess 3a for locking the holder 1 is formed. The coupling ring 2 is attached to the protector main body 1 through the insertion portion 3 in a rotation-preventing manner. That is, by inserting the coupling ring 2 into the insertion part 3, the bulge 11 formed at the end of the coupling ring 2 is fixed in the recess 3a of the insertion part 3,
It is designed to restrict the rotation of the coupling ring.

Also, the coupling ring 2 inserted into the insertion part 3
, one opening 8 faces a space 10 formed inside the protector main body 1, and one end of the inserted coupling ring 2 is locked by a stepped portion 6 provided in the insertion portion 3. It's summery.

Reference numeral 4 denotes a pedestal provided in the insertion part, which is inclined so that the opening 8 of the coupling ring 2 fits into the insertion part 3 at a predetermined angle, and supports the coupling ring 2 from below. Further, the insertion portion 3 is formed with a wall surface 5 that matches the outer peripheral surface of the coupling ring 2, thereby improving the fixation of the coupling ring 2.

Reference numeral 7 denotes a nailing part formed on the outer edge of the protective equipment main body 1, through which a nail to be driven to fix the protective equipment main body 1 to the temporary concrete frame 15 passes through the hole 16. The embodiment shown in FIG.
This nailing portion 7 is formed into an undercut shape. That is, as shown in FIG. 7, the upper part 7a of the nailing part 7 is expanded outward, so that when concrete is poured, the concrete forms an undercut of the lower part 7b of the nailing part 7. The protective equipment main body 1 is prevented from coming off by penetrating into the concrete wall and solidifying, and the protective equipment main body 1 is firmly fixed without coming off from the concrete wall surface.

The conduit end protector according to the present invention is composed of a coupling ring 2, an insertion section 3, and a protection body 1 connected thereto. As for assembly, as described above, simply inserting the coupling ring 2 into the insertion part 3 will fix it into one piece. It is also free to glue them together and fix them together.

Next, a specific usage example of the present invention will be explained.

First, the protector main body 1 is fixed to the concrete temporary frame 15 by driving nails into the nailing portions 7 of the protector main body 1 to the concrete temporary frame 15. Next, the electric conduit 13 is embedded in the opening 9 of the coupling ring 2 which is assembled into the insertion part 3 of the protective equipment main body 1 in a non-rotating state.
Connect one end of. If the conduit end protector is installed in such a state and concrete is poured, and the concrete temporary frame 15 is removed after the pouring and curing, the opening 8 of the coupling ring 2 of the conduit end protector will be exposed to the outside of the concrete wall. Fixed inside. A conduit 14 to be piped is inserted into this opening 8 and connected to perform piping.

(effect) According to the present invention, the following effects can be obtained.

(1) A bulge formed at the end of the coupling ring,
With the recess formed in the insertion part of the protective equipment body, the coupling is assembled to the protective equipment body in a non-rotating state, reliably preventing the coupling from loosening from the protective equipment body, and the rotation of the coupling ring prevents the coupling from rotating into the conduit. This can prevent the coupling ring from twisting or coming loose from the protective equipment body.

(2) Furthermore, the coupling ring can be connected and fixed to the protective equipment body simply by inserting it into the insertion part of the protective equipment body, which is much easier to perform than a structure in which a male threaded portion is screwed into a screw hole.

(3) In addition, the bulge formed at the end of the coupling ring is equipped with a claw that locks the conduit.
You can connect the conduit to the coupling simply by inserting it, making it easy to connect the conduit.

(4) Furthermore, by integrating the protector body and the coupling, the protector body can be made compact and the entire conduit end protector can be made more compact than conventional conduit end protectors. That is, the protector main body of the conduit end protector of the present invention only needs to have a space necessary for inserting the conduit, and does not have any extra space necessary for separately connecting the conduit connector. No need to take up space.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention; Figure 1 is a perspective view thereof, Figure 2 is an exploded perspective view thereof, Figure 3 is a plan view thereof, and Figure 4 is a side cross section thereof. 5 is a front view of the coupling ring, FIGS. 6 and 7 show another embodiment of the present invention, FIG. 6 is a side view thereof, FIG. 7 is an enlarged perspective view of the nailing part, and FIG. 8 and 9 are side sectional views showing how the conduit end protector of the present invention is used, and FIGS. 10 and 11 are plan views of the conventional example and side sectional views showing how the conduit end protector is used. In the figure, 1 is the protective equipment body, 2 is the coupling, and 3
4 is a pedestal, 6 is a stepped portion, and 7 is a nailing portion.

Claims (1)

[Claim for Utility Model Registration] Consisting of a coupling to which a conduit is connected, an insertion part having an inner shape that matches the outer shape of the coupling and into which the coupling is inserted, and a main body of the protector connected to the insertion part, The end of the coupling ring has a bulge with a claw that locks the conduit, and the insertion part of the protective equipment body has a recess that locks the bulging part, and the coupling ring is inserted into the protective equipment body. A buried type conduit end protector characterized by being assembled in a non-rotating state.