JPS6314562B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal protector embedded within a concrete wall.

BACKGROUND ART Conduit pipes for passing electric wires have conventionally been buried in concrete walls of houses and the like. Burying is performed by covering and protecting the end of the conduit with a terminal protector, and then pouring ready-mixed concrete into the conduit. This terminal protector protects the terminal of the conduit from concrete flowing into it.

Such terminal protectors are generally removed from the concrete wall for reuse after use, but since removing them is quite troublesome, they are now divided into two parts to make removal easier than before.
29315), etc., various improvements have been made. Although various improvements have been made, it is still not easy to remove from concrete walls.

The present invention eliminates the need to remove the terminal protector (inserting and protecting the end of a conduit buried in the concrete wall) from the concrete wall, which has conventionally been removed from the concrete wall. This is a new idea of leaving the wiring box buried in the concrete wall and directly fixing the wiring box to the concrete wall surface (for example, the ceiling wall) by using the terminal protector buried in the concrete wall. The present invention embodies this idea.

(Prior Art) For example, when fixing a wiring box in a double ceiling, as shown in FIG.
In addition, a separate metal fitting 33 is used to structure the box 34 to be located within the ceiling space 31. The main reason for this is that the box 34 is fixed after concrete is poured, so the hard concrete wall 35
It is difficult to directly fix the box 34 to the ceiling board 36, and it is difficult to fix the box 34 directly to the ceiling board 36 because molded steel and conduit pipes 37 are routed in all directions on the lower ceiling board 36. Depends on the circumstances. In this way, in the past, the box 34 had to be located within the ceiling space 31;
4 to the terminal protector 38.
9 Furthermore, electrical wiring etc. are required. Furthermore, other parts such as hanging bolts 32 for fixing the box 34 are also required. Further, since the hanging bolts 32 are installed throughout the ceiling space 31, they often get in the way of electrical wiring work.

(Objective) The present invention solves the problems of the prior art. An object of the present invention is to leave such a terminal protector buried in a concrete wall, attach a wiring box to the terminal protector, and thereby fix the wiring box directly to the concrete wall. In addition to the above-mentioned purpose, the invention set forth in claim 4 simplifies the installation process by simply fitting a daruma hole into the head of a screw and sliding the wiring box. The purpose is also to familiarize them.

(Structure) The feature of the present invention is that the terminal protector, which was conventionally removed from the concrete wall, is left buried instead of being removed from the concrete wall, and the wire is wired to the boss section provided on the open end side of the terminal protector. The point is that the box can be fixed directly.

In addition to the above-mentioned features, the invention described in claim 4 is characterized in that a daruma hole is formed in the wiring box.

2 to 8 show examples to which the present invention is specifically applied. Reference numeral 1 denotes a main body of a terminal protector for a buried electrical conduit, which is made of relatively hard plastic, for example. Reference numeral 2 denotes an open end surface of the terminal protector main body 1, and the interior thereof is hollow.
The open end face 2 has a flange 3 in this example. Reference numeral 4 denotes the upper wall of the terminal protector main body 1, which in this example has an arcuate shape as shown in FIG.
Reference numeral 5 denotes the front wall of the terminal protector main body 1, which has a conduit insertion hole 6. Here, in this example, the upper wall 4 and the front wall 5 are inclined in a substantially U-shaped longitudinal section, as is clear from FIG. That is, the upper wall 4
The front wall 5 slopes downward in a curved line toward the right in the figure, and the front wall 5 slopes downward toward the left in the figure. The reason why the front wall 5 is inclined is mainly because the tip of the conduit 8, which is located at a higher position than the insertion hole 6 of the terminal protector main body 1 attached to the curtain plate 7, is bent once as shown in FIG. This is because consideration was given to the fact that it can be inserted into the insertion hole 6 simply by forming the hole 6. In FIGS. 3 and 4, reference numeral 9 denotes a boss portion provided on the open end surface 2 of the terminal protector main body 1.
In this example, two bosses 9 are provided near the front wall 5, as shown in FIG.
As shown in the figure, one portion is provided on the lowermost end side of the upper wall 4. The boss portion 9 is provided with a hole 9a that opens only to the open end surface 2. The holes 9a include both blank holes and screw holes. Furthermore, the hole may be formed by insert molding a nut and embedding it in the boss portion 9. Note that the position and number of the boss portions 9 may be variously changed as necessary. Reference numeral 10 denotes a screw that is screwed into the boss portion 9 so that it can be screwed forward and backward. For example, it is preferable to use a tapping screw, but a screw may also be used. Reference numeral 11 denotes a seat for screw attachment, which is formed by recessing the open end surface 2 side of the boss portion 9. If this seat 11 is recessed, the screw head 10a will not protrude from the open end surface 2 of the terminal protector main body 1. 1
2 is an anchor provided on the outer surface of the peripheral wall other than the front wall 5 of the terminal protector main body 1;
They are provided protrudingly spaced apart by a predetermined length, that is, a dimension L as shown in FIG. In this example, the anchor 12 is formed continuous with a boss portion 9 provided at the lowermost end of the upper wall 4. In addition, the shape of the anchor 12
The position may be changed in various ways. For example, an undercut or a protruding tube may be used. Further, without providing an anchor, the terminal protector body 1 itself may have a structure to prevent it from coming off. Particularly in the case of this example, which has a structure that prevents it from coming off, such as the anchor 12 and undercut, it can be buried in a concrete wall more reliably, and therefore, even when the weight of the wiring box 13 is large, it is reliably prevented from coming off. can. In FIG. 3, reference numeral 13 denotes a wiring box which is separate from the terminal protector main body 1 and has a hole 14. The daruma hole 14 is provided at a position corresponding to the boss portion 9 of the terminal protector main body 1. As shown in FIG. 3, the daruma hole 14 consists of a large-diameter hole 14a and a small-diameter hole 14b continuous therewith. Note that the wiring box 13 of this example has the opening 15 on the top surface connected to the open end surface 2.
It also has a hole 16 in the side plate and a lid plate 17 for closing the lower opening.

Now, a typical example of how to attach the terminal protector main body 1 and the box 13 will be explained. First, screw 10
into the hole 9a of the boss portion 9. Screw 10 like this
As shown in FIG. 7, the terminal protector main body 1 with a built-in
Insert the tip. When the seat 11 is recessed, the screw head 10a is prevented from protruding beyond the open end surface 2 of the terminal protector main body 1.
does not touch the curtain plate 7, and therefore the open end surface 2 touches the curtain plate 7.
can be ensured in close contact with the When fixing the terminal protector main body 1 to the curtain plate 7, it is preferable to drive nails into the terminal protector main body 1 through a nailing portion 18 provided on the outer surface of the peripheral wall of the terminal protector main body 1, as shown in FIG. FIG. 7 shows a state in which the terminal protector main body 1 is fixed by driving nails.

Concrete is poured around the terminal protector main body 1 with the open end surface 2 in close contact with the curtain plate 7 to form a concrete wall 19 as shown in FIG. When the anchor 12 is provided, the terminal protector main body 1 is reliably prevented from coming off by the concrete wall below the anchor 12 and the concrete wall around the electric conduit 8. After that, when the curtain plate 7 is removed from the concrete wall, the open end surface 2 of the terminal protector main body 1 is exposed, so as shown in FIG.
The screw 10 inserted into the seat is rotated appropriately with a screwdriver or the like to unscrew it, thereby causing the screw head portion 10a to protrude from the seat 11.

Once the screw head 10a is protruded in this way, the screw 10 is inserted into the hole 14 of the wiring box 13.
Insert and slide. That is, the large diameter hole 14a of the daruma 14 is first fitted into the screw head 10a, and the daruma hole 14 is slid in this state.
The screw head 10 is formed by the peripheral edge of the small diameter hole 14b.
Fasten a, then use a screwdriver 20 etc. to tighten screw 1.
Turn 0 to tighten and complete. As a result, the wiring box 13 is directly fixed to the surface side of the concrete wall 19 as shown in FIG.

In the above example, the curtain plate 7 is brought into close contact with the screw 10 inserted into the boss portion 9, but instead of this,
The screws 10 may be placed in close contact with the curtain plate 7 without being screwed into the boss portions 9, and the screws 10 may be screwed into the boss portions 9 after the curtain plate 7 is removed from the concrete wall.

(Effects) In the present invention, the terminal protector main body 1 having the boss portion 9 is not removed from the concrete wall 19 and remains buried, unlike the conventional case, and therefore this boss 9 is used. Thus, the electrical wiring box 13 can be easily and reliably attached directly to the surface side of the concrete wall 19. Of course, if the screw 10 is screwed into the boss portion 9 of the terminal protector main body 1 in advance, the risk of losing the screw 10 can be prevented as much as possible.

In addition, in the invention described in claim 4, since the drill hole 14 is formed in the box 13, it is only necessary to fit the drill hole 14 into the exposed screw head 10a and slide it. With very simple work, box 13 can be assembled into terminal protector body 1.
It can be fixed to

As described above, the present invention eliminates the need to remove the terminal protector from the concrete wall, which has conventionally been removed from the concrete wall, and instead allows the terminal protector to remain buried within the concrete wall. This is a new idea for directly fixing a wiring box to a concrete wall using the same hardware.

[Brief explanation of the drawing]

FIG. 1 is a side view for explaining the prior art. 2 to 8 show an embodiment of the present invention,
Figure 2 is a longitudinal side view of the mounting body fixed to the terminal protector body buried in a concrete wall;
The figure is an exploded perspective view of the terminal protector body and box.
Figure 4 is a plan view of the main body of the terminal protector, and Figure 5 is the top view of the terminal protector body.
Figure 6 is a cross-sectional view taken along the - line in Figure 4, Figure 7 is a longitudinal side view of the terminal protector body fixed to the curtain plate, and Figure 8 is a terminal buried in a concrete wall. FIG. 3 is a vertical side view showing a state in which the screw head is exposed from the protector main body. In the figure, 1 is the terminal protector body, 2 is the open end surface, and 4
is the upper wall, 5 is the front wall, 6 is the conduit insertion hole, 8 is the conduit, 7 is the curtain plate, 9 is the boss, 10 is the screw, 10a
11 is a screw head, 11 is a seat, 12 is an anchor, 13 is a box, and 14 is a daruma hole.

Claims (1)

[Scope of Claims] 1 (a) A concrete wall is used to pass through a conduit buried in a concrete wall and to relay a wire extending from the conduit to a wiring box installed in a space outside the concrete wall. It is embedded in the wall surface, and includes (b) a terminal protector body having an open end face and a conduit insertion hole; (c) a boss portion provided on the open end face side of the terminal protector body; ) A terminal protector comprising a hole provided in a boss portion with only the open end surface side open, in order to directly attach a wiring box to the open end surface side of the terminal protector main body. 2. The terminal protector according to claim 1, which has a seat with a recessed hole. 3 (a) A device that is buried in the surface of a concrete wall to relay electric wires extending from a conduit buried in the concrete wall to a wiring box outside the concrete wall, and (b) An open end surface and a conduit insertion hole. (c) a boss provided on the open end side of the terminal protector body; (d) an open end surface for directly attaching the wiring box to the open end side of the terminal protector body; A terminal protector comprising: a hole provided in a boss portion with only one side open; and (e) a screw that is screwed into the boss portion so as to be able to be screwed forward and backward. 4 (a) A device that is buried in the surface of a concrete wall to relay electric wires extending from a conduit buried in the concrete wall to a wiring box outside the concrete wall, and (b) An open end surface and a conduit insertion hole. (c) a boss provided on the open end side of the terminal protector body; (d) an open end surface for directly attaching the wiring box to the open end side of the terminal protector body; (e) A hole provided in the boss part with only the side open;
A terminal protector comprising a wiring box that is attached by fitting a daruma hole into a screw head that is screwed back and protruding from a boss part and sliding the wiring box.