JP3031784B2 - Storage box for electrical equipment embedded in ceiling and method of installing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a heat detector, a smoke detector, a gas detector in an automatic fire alarm system, an infrared detector in a security system, or an electric device such as an illumination lamp. TECHNICAL FIELD The present invention relates to a ceiling-mounted electrical device storage box configured to be housed in a ceiling and mounted with its box body embedded in a ceiling, and a method of installing the box.

[0002]

2. Description of the Related Art Conventionally, there is an exploded perspective view in FIG. 8 and a sectional view in an attached state in FIG.

According to this conventional example, a connecting portion 03 of an electric wire insertion pipe 02 is formed at a predetermined position in a circumferential direction of a cylindrical body 01, and a pair of inward tongue pieces 0 are respectively provided at upper and lower sides.
4, 05 are connected, and a pair of outward tongue pieces 06 are connected to the lower part.

An upper lid 07 is attached to the upper inward tongue pieces 04 and 04 by screwing, while an annular member 08 is attached to the lower inward tongue pieces 05 and 05 by screws. It is attached by a stopper, and an attachment portion 010 of the electric device 09 is formed on the annular member 08.

[0005] According to these constructions, when forming a slab, nails 012 passed through outwardly extending tongue pieces 06 and 06 are driven into a formwork 011 prior to casting concrete, and the cylindrical body 01 is formed into a formwork 011. After the electric wire insertion pipe 02 is connected to the connection portions 03, 03, the upper lid 07 is closed with screws to the upper inward tongue pieces 04, 04 to close the upper lid.

[0006] Concrete 013 is poured from above,
After the concrete 013 is cured and solidified, the formwork 011 is removed, and thereafter, after completion of the skeleton construction, the inside of the tubular body 01 is cleaned, and the electric wire 014 is inserted into the electric wire insertion pipe 02, and further, electrical equipment 09 to 0
14 and the lower inward tongue pieces 05, 0
5, an electric device 09 is attached.

However, in the case of the conventional example described above,
After completion of the skeleton work, etc., the inside of the tubular body 01 must be cleaned, and the cleaning, the insertion of the electric wire 014, the connection of the electric wire 014 to the electric device 09, and
Since all of the installation of the electric device 09 must be performed in an upward operation at a high place using a rolling tower or the like, there is a disadvantage that not only the workability is poor but also a great deal of fatigue is imposed on the operator. .

[0008] In order to avoid the above-described conventional upward work at a high place, the present applicant has proposed an improved example as shown in the sectional views of FIGS. (Japanese Patent Application No. 2-308276).

According to this improvement, the first cylindrical member 021
And the second cylindrical body 022 are connected in a nectar state via a terminal block mounting plate 024 for mounting the terminal block 023 and first packings 025 and 025 above and below.

A connection portion 027 of the electric wire insertion pipe 026 is formed at a predetermined position in the circumferential direction of the upper first cylindrical body 021, and an inward flange 028 is connected to an upper portion thereof. The upper lid 029 is mounted in a nectar state via the second packing 030.

A lower lid 033 is connected to the inward flange 031 at the lower portion of the lower second cylindrical body 022 via a tear-like portion 032 formed in a circular shape and having a very thin wall thickness, A handle 03 for tearing is provided on the lower surface of the lower lid 033.
4 are connected.

An annular slide member 035 is provided in the second cylindrical body 022 so as to be movable in the vertical direction with its inner peripheral surface serving as a guide, and the slide member 035 is provided.
In addition, for example, electrical devices 036 such as smoke detectors and heat detectors
The terminal block 023 is mounted on the terminal block mounting plate 024, and the terminal block 023 and the electrical equipment 0 are mounted.
36 is a wire 037 having a length that allows vertical displacement.
And the electric wire 038 inserted into the electric wire insertion pipe 026 is connected to the terminal block 023. In the figure, reference numeral 039 denotes a sensing unit 03 below the electric device 036.
Shown is a cushioning member such as a sponge attached to the lower lid 033 to prevent the 6a from abutting the lower lid 033 and being damaged. In the figure, reference numeral 040 denotes a second cylindrical body 022.
A fixed claw projecting from the lower inward flange 031 at a predetermined interval in the circumferential direction in a nectar state is shown.

With the above configuration, when forming a slab,
Prior to placing concrete, the outward fixed claws 040, 040 are pierced into the formwork 041, and the first and second tubular bodies 021, 022 are placed and fixed on the formwork 041, and the connecting portion 0
27, 027, the wire insertion pipe 026 is connected, the wire 038 is inserted into the wire insertion pipe 026, and the terminal block 02 is connected.
3 and then connect the upper lid 029 to the first cylindrical body 02
The first inward flange 028 has a first packing 0
Screws 25 are closed via 25.

[0014] Concrete 042 is poured from above,
After the concrete 042 is cured and solidified, the formwork 041 is removed.
34, a hook (not shown) is hooked, the lower lid 033 is peeled off from the tearing portion 032, and the electric device 036 is moved downward to be supported by the inward flange 031 on the lower side of the second cylindrical body 022. The sensing unit is configured to protrude downward from the ceiling.

[0015]

However, in the case of the above-mentioned improved example, since the nectar state must be maintained at the tearing portion 032, the strength of the tearing portion 032 is hardly weakened. 034 is easily torn off, and if such a tear occurs, the lower lid 033 is not removed properly, such as a tear-off portion 032 must be cut by upward work using a stepladder and the lower lid 033 must be peeled off. There is a drawback that causes.

The present invention has been made in view of such circumstances, and the electric equipment storage box for ceiling embedding according to the first aspect of the present invention has an opening closed by a cap that can be attached to and detached from the opening. An object of the invention according to claim 2 is to provide a device that can easily attach an electric device to a ceiling in a state where a part such as a sensing unit projects without relying on an upward operation. The purpose of the present invention is to prevent the surface of the peripheral portion of the opening of the box main body from being soiled. It is an object of the present invention to make it easy to remove a cap from a ceiling, and further to install an electric equipment storage box for ceiling embedding according to the invention according to claim 4. Are irrespective of the upward working part such as the sensing unit is intended to be able easily attached to the electrical equipment on the ceiling in a state of projecting.

[0017]

According to a first aspect of the present invention, there is provided an electric equipment storage box for mounting on a ceiling, in which an opening is provided at a lower side of the box body and a formwork is provided on the formwork. An attachment member for attaching and fixing is attached to the box body, and in the box body, a part of the electric device is housed so as to be able to move out of the opening so as to be vertically displaceable,
In addition, a cap is provided that is detachably attached to the opening to close the opening.

According to a second aspect of the present invention, in order to achieve the above object, the electric equipment storage box for ceiling embedding is mounted on the opening over the entire outer peripheral edge of the cap according to the first aspect. A supporting portion protruding downward from the outer surface of the peripheral edge of the opening and abutting and supporting the formwork is provided.

According to a third aspect of the present invention, in order to achieve the above object, the electrical equipment storage box for ceiling embedding is provided with the cap according to the first or second aspect attached to the opening in the opening state. A pull-out member is provided so as to be elastically displaceable between an approaching falling posture and a standing posture away from the opening, and which becomes a standing posture in a natural state.

According to a fourth aspect of the present invention, there is provided a method of installing an electric equipment storage box for embedded in a ceiling according to any one of the first to third aspects of the present invention. Place the device storage box on the slab formwork with the cap attached to the opening,
Attach and fix to the formwork via the mounting member, connect the electric wiring, pour concrete, remove the formwork after curing and solidification, remove the cap, and make a part of the electric device protrude from the opening It is characterized by.

[0021]

According to the structure of the electrical equipment storage box for ceiling embedding according to the first aspect of the present invention, the box body is mounted and fixed to the form via the mounting member in a state where the opening is closed by the cap, and reinforcing bars are arranged there. At the same time, cast concrete, remove the formwork after curing and solidification, complete the framing work such as interior decoration, remove the cap, and make a part of the electrical equipment such as the sensing part protrude from the opening Electrical equipment can be mounted on the ceiling.

According to the configuration of the electric equipment storage box for ceiling embedding according to the second aspect of the present invention, the cap is mounted on the opening and fixed to the formwork, so that the lower surface of the electric equipment is supported by the support portion. Can be supported in a state of being lifted from the upper surface of the formwork, and the downward facing peripheral surface of the opening of the box body can be covered with cast concrete.

According to the third aspect of the present invention, in the state where the electric equipment storage box is mounted on the ceiling, the draw-out member against the elastic restoring force due to the contact with the form when the apparatus is fixed on the form. In a collapsed position approaching the opening, and
When the form is removed, the pressing force is released, and the state becomes a natural state, so that the pulling-out member can be displaced from the opening to a standing posture in which the pulling-out operation is easy from below.

According to the construction of the method for installing the electrical equipment storage box for ceiling embedding according to the fourth aspect of the present invention, it is possible to fix the mounting to the formwork with the cap attached to the opening, connect the electric wiring, and drive the concrete. By installing, removing the mold, and removing the cap, the electric device can be attached to the ceiling with a part of the electric device protruding from the opening.

[0025]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of a main part of an electric equipment storage box for ceiling embedding according to the present invention, and FIG. 2 is a cross-sectional view showing a state where the electric equipment storage box is fixed to a formwork. An opening 2 is provided on the lower side of the box body 1, and pipe connection portions 4, 4 for connecting the wire insertion pipe 3 are provided on side walls of the box body 1 facing each other,
An inner screw 5 is provided at each of the upper four corners of the box body 1, and a lid member 7 is externally fitted via a packing 6 and attached by screws 8. An L-shaped attachment member 10 attached to and fixed to the formwork 9 is attached to an outer surface of each of a pair of mutually facing side walls of the box body 1.

A slide plate 11 is provided in the box main body 1 so as to be vertically displaceable using the inner peripheral surface thereof as a guide, and a lead wire 1 is provided at the center of the slide plate 11.
2 and a hole 13 through which a pair of screws 1 are formed.
4, 14 are attached.

A terminal board 15 for connecting the lead wires 11.
An arc-shaped elongated hole 1 through which each of the screws 14 is inserted
6 is formed, and one end of each of the long holes 16, 16 in the longitudinal direction is formed in a hole 17 having a larger diameter than the head of the screw 14. Terminal board 15 by tightening the screws 14 and 14.
Are integrally attached to the slide plate 11, while the terminal board 15 can be separated from the slide plate 11 by performing the reverse operation.

A knife-shaped contact member 18 connected to the terminal board 15 by being inserted and removed from the horizontal direction is provided. On the other hand, a sensing member 19 for sensing heat and the like is connected to the knife-shaped contact member 18 from the horizontal direction. A contact member (not shown) for external fitting and connection is provided by insertion and removal of the terminal board 15.
Guide groove 21 is formed in the sensing member 19.
Are provided with projections (not shown) which are fitted into the arc-shaped guide grooves 21 and 21. The projections are fitted into the guide grooves 21 and 21 and the sensing member 19 is rotated so that the contact member is turned into a knife-shaped contact. The sensing member 19 is integrally attached to the terminal board 15 by being connected to the member 18 and prevented from coming off, while the sensing member 19 can be separated from the terminal board 15 by a reverse operation. The slide plate 11 described above
And the terminal board 15 and the sensing member 19 are referred to as an electric device A.

A cap 23 for closing the opening 2 of the box body 1 is detachably attached thereto. The cap 23 has a spherical portion at the center thereof for receiving and supporting the downwardly facing outer surface of the sensing member 19, and has a tapered surface F whose diameter becomes larger toward the lower side over the entire outer peripheral edge thereof. In the attached state, a support portion 24 that protrudes outward and downward from the outer surface of the peripheral edge of the opening 2 and abuts and supports the formwork 9 is additionally provided. The cap 23 is, for example,
It is formed of an elastic material such as low density polyethylene. A gap is formed between the downward facing surface of the opening 2 of the box body 1 and the formwork 9 by the support portion 24, and concrete can be wrapped around the gap to cover the gap. There is nothing.

The cap 23 has a downwardly facing surface that can be elastically displaced between a falling position approaching the opening 2 and a standing position away from the opening 2 when attached to the opening 2, and a standing position in a natural state. A pair of pull-out members 25,
25 is integrally provided, and each of the extraction members 25 has a hole 26 for hooking a hook or the like.

Next, a description will be given of a method of installing the electric equipment storage box B having the above-mentioned structure for mounting on a ceiling.

First, as shown in FIG. 2, with the lid member 7 removed and the cap 23 attached to the opening 2,
The box body 1 is placed on a slab formwork 9. Then, the nail 27 is driven into the formwork 9 via the mounting members 10, 10, and is fixed to the formwork 9. In this state, the pull-out member 25 is pressed on the upper surface of the mold 9 and
It is displaced to the falling posture against the elastic restoring force.

Next, a wire insertion pipe 3 is connected to each of the pipe connection portions 4 and 4, and an electric wire 28 is inserted into each of the wire insertion pipes 3 and 3 and connected to the lead wires 12 and then the cover member is connected. 7 are attached with screws 8 through the packing 6.

After that, although not shown, upper and lower streaks are arranged, and as shown in the sectional view of FIG.
The concrete 29 is poured on top and cured.

After the concrete 29 has solidified, the form 9 is removed. With the removal of the formwork 9, as shown in the cross-sectional view of FIG. 4, the pull-out member 25 is in a natural state and returns to the upright posture. Thereafter, the cap 23 is removed after the frame work such as the interior of the lower part is completed, and the electric equipment A
Is moved downward by its own weight, and the sensing member 19 is
From the bottom.

FIG. 5 is a sectional view showing a modification of the cap 23. A pair of pull-out members 25a, 25a are respectively mounted on the downward surface of the cap 23 so as to be swingable about a horizontal axis P. Pull-out member 25
a, 25a, in the natural state, the opening 2
When the box body 1 is attached to the form 9, a coil spring 30 is provided that urges the coil spring 30 to be in a standing position away from the opening 2 in a state where the box spring 1 is attached to the form 2. It is configured to be elastically displaced to a standing position in which the pull-out operation is facilitated with the removal of the formwork 9 while being in the falling position approaching the opening 2.

FIG. 6 is a perspective view showing another modification of the cap, and FIG. 7 is a sectional view thereof. A pair of projections projecting outward and rising upward on the outer peripheral edge of the cap 23. 31 and 31 are provided, and locking holes 33 and 33 for fitting and locking both ends of the yoke-shaped tool are formed on the downward surface.

On the other hand, notches 34 for inserting and removing the projecting pieces 31 are formed at two positions in the circumferential direction of the opening 2 of the box body 1, and the inner peripheral surface of the opening 2 on the upper side of the notch 34. Are formed on the tapered surface F1 and the horizontal surface F2 connected thereto.

With these configurations, the projections 31, 31 are inserted into the notches 34, 34 so as to be aligned with the notches 34, 34, and the cap 23 is rotated in this state, whereby the cap 23 is pushed up to the opening 2 side by the tapered surface F1. And attached to the box body 1 in a sealed state.
The cap 23 can be removed from the box main body 1 by inserting and locking both ends of a yoke-shaped tool into the third and 33 and rotating in the opposite direction.

According to the electric apparatus A of the above embodiment, the terminal board 15 can be attached to and detached from the slide plate 11 by rotating and tightening the screws 14, and the sensing member 19 can be attached to and detached from the terminal board 15 by rotating. Further, the terminal board 15 and the sensing member 19 are configured to be able to be taken out from the opening 2. As described above, even after the electric device A is mounted in a state of being embedded in the ceiling along with the formation of the slab, the opening can be removed. 2 has an advantage that the maintenance can be easily performed appropriately.

In the above embodiment, the electric equipment A incorporating the heat detector and the smoke detector in the automatic fire alarm system has been described. However, the present invention relates to, for example, a gas detector or an infrared detector of a security system. Alternatively, the present invention can be applied to the case of an electric device incorporating a lighting lamp.

[0043]

As described above, according to the electrical equipment storage box for ceiling embedding according to the first aspect of the present invention, by detaching the cap, when the concrete is poured,
Also, when performing framing work such as interior decoration, prevent slag, water, dust, etc. from entering the box body,
Eventually, the electrical device such as the sensing unit can be mounted on the ceiling with part of the electrical device protruding from the opening. Generation can be avoided favorably, and an electric device can be easily mounted on a ceiling in a state where a part such as a sensing portion projects without relying on upward work.

According to the electrical equipment storage box for ceiling embedding according to the second aspect of the present invention, the peripheral surface of the opening of the box body is covered with the cast concrete without contacting the formwork. The surface of the peripheral portion of the opening can be prevented from being stained, and the appearance can be improved.

According to the electrical equipment storage box for ceiling embedding according to the third aspect of the present invention, the pull-out member which has been in a collapsed position with the removal of the formwork, for example, after completion of the frame work such as the interior. Is elastically displaced into a standing position, so that it is easy to pull out from below, such as by hooking a hook or the like, and to easily remove the cap.

According to the method for installing the electrical equipment storage box for ceiling embedding according to the fourth aspect of the present invention, when the slab is formed, it is mounted and fixed to the formwork, connected to the electric wiring, cast concrete, and cured and solidified. By removing the frame and removing the cap after completion of the framing work such as interior decoration, the electrical equipment is attached to the ceiling with part of the electrical equipment protruding from the opening, so the work on the lower side includes tearing etc. All you have to do is remove the cap without removing it, and you can perform other tasks from the upper side in the same way as reinforcing bars, and easily mount electrical equipment on the ceiling with parts such as the sensing unit protruding. Now you can.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of an electric device storage box for ceiling embedding according to the present invention.

FIG. 2 is a cross-sectional view showing a fixed state of attachment to a mold.

FIG. 3 is a cross-sectional view showing a state where concrete is cast.

FIG. 4 is a cross-sectional view showing a state where a mold is removed.

FIG. 5 is a sectional view showing a modified example of the cap.

FIG. 6 is a perspective view showing another modification of the cap.

FIG. 7 is a sectional view showing another modification of the cap.

FIG. 8 is an exploded perspective view of a conventional example.

FIG. 9 is a cross-sectional view showing a mounting state of a conventional example.

FIG. 10 is a sectional view showing an improved example.

FIG. 11 is a cross-sectional view showing a mounting state of an improved example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Box main body 2 ... Opening 9 ... Mold frame 10 ... Mounting member 23 ... Cap 24 ... Support part 25 ... Pull-out member 29 ... Concrete A ... Electric equipment

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiharu Nakajima 4-1-1, Honcho, Chuo-ku, Osaka City Inside Takenaka Corporation Osaka Main Store (72) Inventor Mitsuaki Takeda 2-3-3 Higashitenma, Kita-ku, Osaka-shi No. 21 Inside Nichido Electric Works Co., Ltd. (72) Inventor Shigeru Nakajima 2-3-21 Higashitenma, Kita-ku, Osaka City Inside Nichido Electric Works Co., Ltd. (56) References JP-A-64-93869 (JP, A) 4-178800 (JP, A) Japanese Utility Model Showa 56-34904 (JP, U) Japanese Utility Model Utility Model Hei 4-35616 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 3/12 H02G 3/20 H05K 5/02

Claims (4)

(57) [Claims] An opening is provided at a lower side of a box main body, and an attaching member to be attached to and fixed to a mold is attached to the box main body. An electric device storage box for ceiling embedding, comprising: a device for storing a device so as to be displaceable in a vertical direction, and a cap for detachably attaching the device to the opening to close the opening. 2. A support portion is provided over the entire outer peripheral edge of the cap according to claim 1 so as to protrude below the outer surface of the peripheral edge of the opening in a state of being attached to the opening and to support and support the formwork. Electrical storage box for ceiling mounting. 3. The cap according to claim 1 or 2,
A ceiling-embedded electrical device provided with a pull-out member which is elastically displaceable between a falling position approaching the opening and a standing position away from the opening when attached to the opening, and which is in a standing position in a natural state. Storage box. 4. The electrical equipment storage box for embedded ceiling according to claim 1, 2 or 3 is placed on a slab formwork with a cap attached to an opening.
After attaching and fixing to the form via an attaching member and connecting electric wiring, placing concrete, removing the form after curing and solidifying, removing the cap, opening a part of the electric device to the opening. The installation method of the electrical equipment storage box for ceiling embedding characterized by making it protrude from the ceiling.