JPS59144310A - Method of mounting concrete box and engating tool used therefor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for installing a concrete box in which electrical wiring is carried out while being buried in a concrete wall of a building, and a locking tool used therefor.

Conventionally, there is a concrete box shown in Fig. 1. In order to install this concrete box A with its opening B in contact with the temporary frame C, it has a structure in which 6 openings are made on the back side of the concrete box and a separate back wall E is brought close to the concrete box. That is, after attaching the concrete box A to the temporary frame C, remove the back wall E (screw off the screws F and F), attach the connector H to the conduit insertion hole G of the concrete box A, and then attach the connector H to the back wall E. Attach the connector, fill the back opening, and install the 11-piece electric cotton pipe. Now, fit the male part H' of the connector H into the conduit insertion hole G of the concrete box A from the outside of the box, and fit the female part H'' from the inside of the box to hold the periphery of the conduit insertion hole 0. Since the connector H is to be attached, the connector H cannot be attached unless the back wall E is removed.In this way, the conventional product does not require the complicated work of removing and attaching the back wall E. Furthermore, if the user forgets to attach the back wall E, concrete ~1 will enter the box, which often results in a very troublesome situation in which the concrete box A cannot be used at all.

In view of these drawbacks, the present invention forms a space on the outside of the side wall of the concrete box, and inserts and holds a locking tool to the outer wall of the conduit into the window space to secure the conduit. The purpose of this invention is to improve the workability of installing the concrete I-box and to prevent concrete I-1 from entering the concrete box.

That is, in the present invention, a concrete box is attached to a temporary frame with the opening surface of the concrete box in close contact with the temporary frame, and the front wall of the concrete box is removed without removing the back wall of the concrete box. , With the conduit through the cotton tube insertion hole facing the conduit, insert the locking tool into a certain space formed on the outside of the side wall of the concrete box, support it, and lock the locking tool to the outer wall of the conduit. How to install a concrete box made by pouring concrete 1N around the side wall, having a conduit insertion hole in the side wall, and protruding a holding plate with a certain space on the outside of the side wall, and inside the holding plate. A locking tool for use in a concrete box having an opening through which a conduit is inserted at a position corresponding to the conduit insertion hole, the locking device being provided on at least two opposing sides of the clamping plate forming the window space. A lock used in the method for installing the concrete box, which has an external shape to be handled and an opening that fits into the conduit, and a conduit locking part is provided inwardly protruding from the opening. We aim to provide the following ingredients.

Examples will be explained below. Figure 2 (A) Port C) (
c) is a perspective view and a bottom projection view of a locking device that locks onto a corrugated conduit, and Figure 3 is a perspective view and its bottom projection of a locking device that can lock onto both corrugated and smooth conduit. The bottom projection view, Figure 4 is a perspective view of the method of inserting the fastener into the concrete box and the concrete box, Figure 5 is a cross-sectional view showing the state in which the corrugated conduit is attached to the concrete box, and Figure 6 is The figure is a diagram showing how the concrete box is attached to the temporary frame. FIG. 2(a) shows a hollow rectangular parallelepiped locking tool 1 with an open bottom surface.
An inverted U-shaped opening 2 is formed which has a reduced dimension: a and a horizontal dimension: b and is connected to the lower opening and is fitted into the conduit.
A conduit locking portion 3 is provided on the inner circumferential surface of the wire. The conduit locking portion 3.3 is formed to have a width that fits into the valley width W of the corrugated conduit 4 in which peaks and valleys continue alternately. The locking tool B shown in FIG. 2 (b) is H-shaped in plan, has a reduced dimension: a, and a horizontal dimension: b, and has an inverted U-shaped opening 2' that fits into the conduit, and this opening It has conduit locking parts 3'' and 3' provided on the inner circumferential surface of the wire conduit 21.The locking tool 1'' shown in FIG. Valley width of pipe 4: Corresponds to W, horizontal dimension: B,
Open D 13112"EC'li fc line%' Section J
k BB 3", 3' 11.1Hci (a) (0)
It is similar to The locking tool 1'' shown in FIG. In this case, there is a conduit locking part 3': a” on the outer wall.
It locks by biting in 3sft of the sharp end. The rest of the structure is the same as the locking tool 1.141') shown in FIG. 2, and can also lock corrugated electrical conduits. FIG. 4 shows a concrete I/box 5 used in the present invention, which has a rectangular parallelepiped shape with an open bottom and a back wall integrally formed with the side walls, and the side walls have conduit insertion holes 6. There is a space k with a rectangular cross section on the outside of the side wall, and a holding plate 8...
... is provided protrudingly, and the holding plate 8 has a U for inserting the conduit into the position corresponding to the conduit insertion hole 6.
4 fixed spaces 7 having character-shaped openings 9...
. . . is a locking tool 1, bi, +r: 1'l), and at least two opposing surfaces are a locking tool 1.1t1'.
71'''', that is, the reduced size: a, W or the horizontal size: b.
When it is formed to a size that fits closely with W, the locking tool 1,
+', +:'+'''+i, -+ 7 ri') -h
Hox 5% (Since it is in contact with the IllI wall, even if concrete 1 is poured, concrete will not be received inside the concrete box 5 through the gap between the conduit insertion hole 6 and the conduit.) .In addition, conduit insertion hole 6...
. . . is usually called a knockout, and has a cut 10 shown in FIG. 5, which is opened and broken with a hammer or the like when in use, so that a conduit can be inserted therethrough. Therefore, the unused conduit insertion hole 6...
Concrete will not enter the concrete box 5 from... In the figure, reference numeral 11 denotes protrusions having holes 13 for fixing the concrete box 5 to the temporary frame 12, and two protrusions are provided at symmetrical positions.

The method for attaching the concrete box of the present invention constructed in this way will be described. As shown in FIG. 6, the concrete box 5 is attached to the temporary frame 12 using the dogetsu 4.

Next, as shown in FIG. 5, the conduit insertion hole 6 provided in the side wall of the concrete box 5 is penetrated with a hammer or the like, and the corrugated conduit 4 is inserted into the opening 9 provided in the holding plate 8. Then, insert the conduit through the conduit insertion hole 6 to face the inside of the concrete box 5, and insert the locking tool 1 into the fixed space 7 (direction R in Fig. 4). Stop part 3
into the valley of the corrugated wire g4, and attach the locking tool 1 to the clamping plate 8.
possess. This completes the installation of the corrugated electric conduit 4 to the concrete box 5, and concrete is poured around the concrete box 5.

In this way, the present invention provides a clamping plate protruding from the outside of the side wall of the concrete box to form a fixed space, and a locking tool is inserted and clamped into this fixed space to lock the locking tool to the outer wall of the conduit. By doing this, the conduit was attached to the concrete box 1\box and then concrete was poured, so in order to install the connector into the conduit insertion hole like a conventional concrete box, the separate back wall was removed and reinstalled. This eliminates this complicated work and greatly improves work efficiency. Also, since a large number of concrete boxes are used at the same construction site, it is often necessary to forget to attach a separate back wall when using conventional concrete boxes. If this situation continued, concrete would fill the concrete box during concrete pouring, making it impossible to run wiring inside the concrete box, necessitating extremely time-consuming repair work. However, the concrete box installation method of the present invention does not require the removal and installation of the separate back wall as described above, so it is easy to install concrete inside the concrete box even if you forget to install the back wall!・There is no intrusion at all. Therefore, troublesome repair work is completely unnecessary, which significantly contributes to improving work efficiency.

Furthermore, since the locking tool of the present invention is used on at least two opposing sides of the fixed space formed by the killing plate protruding from the outside of the concrete I/hook side wall,
・Even if external force such as installation pressure acts on the conduit, locking device, etc., it will not easily come off.

Then 2, Con 7 sort; IJ 7th to 14 I γ 1 - U 9 To Hayabusa 1 Ko is 6 (History Z゛ matches.

[Brief explanation of drawings]

Figure 1 is a partially broken front view showing the conventional concrete box installation method, and Figures 2 (a), (b), and (c) are
FIG. 3 is a perspective view of a locking device that can be locked to a corrugated conduit and its bottom projection, and FIG. Figure 4 is a perspective view of the concrete box and the method of inserting the locking device into the concrete box, Figure 5 is a cross-sectional view showing the state in which the corrugated conduit is installed in the concrete box, and Figure 6 is a perspective view of the concrete box. The figure shows a state in which concrete 1\water box is attached to the temporary frame. Explanation of the symbols of the main parts 1.1', 1"I""...2 with the locking tool 2.2
″'...Opening 3 to 3', 3'''...Conduit locking part 4...
... Corrugated conduit 5 ... Concrete point 6 ... Conduit insertion hole 7 ... - Leg space 8 ... Holding plate 9 ... Opening part 1 Figure 3

Claims (2)

[Claims] (1) Attach the concrete box to the temporary frame with the opening surface of the concrete box in close contact with the temporary frame,
The conduit can be exposed to the conduit insertion hole of the concrete box without removing the back wall of the concrete box.]
]Installing a concrete box by inserting a locking tool into a certain space formed on the outside of the concrete box side, locking the locking tool to the outer wall of the conduit, and pouring concrete 1 around the concrete box. Method. (2) A conduit insertion hole is provided on a side wall f, a clamping plate is protruded from the outside of the side wall with a certain space, and a conduit is inserted into the clamping plate at a position corresponding to the conduit insertion hole. A locking tool for use in a concrete box having an opening for insertion, which comprises an outer shape that is held between at least two opposing sides of a holding plate that forms a window space, and an opening that fits into a conduit. and a conduit locking portion provided on the inner circumferential surface of the opening! - Locking tool used for box installation method.