JPS595733B2 - Lighting fixtures and other fixtures embedded in concrete structures and their construction methods - Google Patents

Description

Detailed Description of the Invention (Object of the Invention) The present invention provides a fixture main body into which a hanging bolt for directly or indirectly suspending a lighting fixture or other appliance or device is inserted into the ceiling of a concrete structure. Nails whose tips are exposed when the curtain board is removed after the concrete that makes up the ceiling has hardened can be removed without damaging the fixture body in the slightest, and the removal work is extremely easy. This invention relates to lighting fixtures and other fixtures that are intended to be easily embedded in concrete structures.

(Prior Art) Conventionally, as shown in FIG. 4, a fixture body 16Fi supporting a hanging bolt 15 for hanging lighting equipment etc. from the ceiling 23 of a concrete structure has a vertical cross section approximately in the shape of an hourglass and is inserted into the interior. A blind nut 19 having a label 18 at the center is fitted into the socket 17, and a plurality of pairs of bolts are formed in each of seven flanges 20, 20 provided on both upper and lower end surfaces of the fixture body 16. The nail holes 21, 21 of each pair are on the same axis, and the nails 22 are inserted through the corresponding upper and lower nail holes 21, 21, respectively, and the nails 22 are attached to the ceiling 23.
A method has been used in which the fixture body 16 is nailed and fixed on the curtain plate 24 of the concrete pouring basin that constitutes the concrete, and the curtain plate 24 is removed after the poured concrete has hardened. The tip of the nail 22 will be exposed after removing the curtain plate 24, so attach the exposed part of this nail 22 to the ceiling 2.
Since it was bent to the 3rd side, the ceiling 23 after construction
The disadvantage was that it significantly impaired the aesthetic appearance of the

Furthermore, when bending the nails 22, there is a risk of damaging the fixture body 16 and the ceiling 23, which requires skill.

(Structure of the Invention) In view of the above-mentioned problems, the present invention has been devised to provide a nail hole which is in parallel contact with the suspension port insertion hole in the center of the synthetic resin fixture body and which communicates with the suspension bolt insertion hole on the contact side. A micro-protrusion or a thin-walled membrane-like support is provided in the hole, and after the nail is inserted into the nail hole, a nut is placed through a washer, and the nut is fitted with a blind lid, which is also made of synthetic resin and has an inner cavity into which the nut fits. The present invention can be described with reference to the drawings of the embodiments. In Figures 1 and 2, the fixture body 1 is integrally made of synthetic resin. Nail holes 3 are formed at two or more locations (two locations in this embodiment) penetrating the axis of the fixture body 1 and parallel to the hanging bolt insertion holes 2, and these nail holes 3 and It communicates with the hanging bolt insertion hole 2 on the side surface in contact with the hanging bolt insertion hole 2, and a part of this communication part is provided with a minute protrusion or a thin film-like shape to the extent that the nail 4 inserted into the nail hole 3 does not come out into the hanging bolt insertion hole 2. As shown in FIG. 2A, a seat 6 is formed at the top of the fixture body 1 from which the nail head leading to the top of the nail hole 3 escapes, into which a blind cover 7, which will be described later, is fitted. A seat 8 is provided on the upper surface of the fixture main body 1, and legs 9, 9 are integrally molded on the lower outer periphery so that the fixture main body 1 can easily sit vertically on a curtain plate A (see Fig. 3 A) to be described later. has been done.

A washer 10 and a nut 11 are placed on top of each other on the seat 8, so as to cover both the washer 10 and the nut 11.
The blind lid 7, which is also made of synthetic resin and has a lumen 12 having the same shape as the outer shape of the nut 11, can be closed by applying an adhesive to the corresponding surface of the upper part of the fixture body 1.

Prior to this lid installation, nails 4, 4 are inserted into the nail holes 3, 3 in advance.

The above-mentioned corresponding surfaces are the lower inner peripheral surface 12' of the inner cavity 12 of the blind lid 7 and the upper outer peripheral surface 1' of the fitting main body 1 shown in FIG. There is a corresponding surface when it is placed over the main body 1, and this becomes the adhesive surface.

(Operation of the invention) To explain the operation of this invention with reference to the drawings of the embodiment, the third
When constructing a concrete ceiling B of a concrete structure (not shown) in Figure A and the same entrance, a lighting fixture or a hanging frame made of shaped steel or other material to hang this lighting fixture from the ceiling B ( In order to bury the fixture body 1 of the hanging port 13 for suspending the hanging port 13 (not shown), stretch the curtain plate A at the position of the ceiling B of the structure as shown in Fig. 3A. A nail 4 is inserted into the nail hole 3 in advance along the planned wiring route of the fixture body 1.
In this way, the required number of fixture bodies 1 are sequentially hammered onto the top surface of the curtain plate A, and after this work is completed, concrete of the required thickness is poured onto the curtain plate A. to construct ceiling B.

Next, when the concrete of this ceiling B has hardened, the curtain plate A
When it is removed, the lower part of the nail 4 that was driven into the curtain plate A protrudes from the nail hole 3 as shown in Fig. 2A, so gently push the nail 4 toward the support part 5 side with a hammer. When the nail 4 is pressed in the direction of the center of the hanging bolt insertion hole 2 by tapping or using pliers, the minute support part 5 is broken due to the impact or pressure, and the nail 4 is inserted through the nail hole 3. It is pushed out into hole 2 and falls.

After removing the nail 4, insert the hanging bolt 13 into the hanging bolt insertion hole 2 as shown in Figure 3, and insert the nut 1 in the blind cover 7 deep inside.
1 by screwing the male threaded part 14 at the tip of the hanging bolt 13 into the fixture body 1, and sequentially attaching the hanging bolt 13 to the fixture body 1.
Hanging lighting fixtures, electrical wiring conduits, exposed pipes for liquids, gases, etc., and other fixtures or equipment directly, or suspending lighting fixtures and other fixtures or equipment via shaped steel or other hanging frames.

(Effects of the Invention) This invention provides nail holes that communicate with each other in parallel with the hanging bolt insertion holes of the fixture body, and the lower part of the nail hole is squeezed by a micro-projection-like support part or by a thin-walled membrane-like support part. It is blocked off by the part to prevent the nail from coming out of the nail hole when not in use.
After this mounting bracket is buried in a concrete ceiling and the concrete hardens and the curtain plate is removed, the nail can be easily removed from the nail hole by tapping the nail lightly against the supporting part or applying pressure with a hand tool. Can be done.

Therefore, unlike conventional methods in which nails cannot be removed after installation, the exposed part is bent to the ceiling and the appearance is significantly damaged, this method is effective in removing nails without damaging the fixture itself. big.

In addition, this invention provides legs on the outer periphery of the fixture body, so the curtain plate A
It is possible to maintain a vertical posture so as to provide stability when concrete is poured into concrete and not easily fall over even if there is some impact when pouring concrete.

[Brief explanation of drawings]

Figure 1 is an enlarged side perspective view of the fixture body and accessories of this invention when disassembled, Figure 2 A is a partially broken side view when assembled, the opening is a bottom view of only the fixture body, and C is the blind side. A partially broken side view and a bottom view of the lid, Figures 3A and 3B are illustrations of the construction procedure, and Figure 4 is an illustration of the prior art. (Explanation of symbols of main parts) 1... Fixture main body,
2... Hanging bolt insertion hole, 1'... Upper outer peripheral surface, 3... Nail hole, 4... Nail, 5...
... Nail hole support part, 6 ... Nail head seat, 7.
...Blind cover, 8...Blind cover seat, 9...
...Leg, 10...Washer, 11...Nut, 12...Inner cavity, 12'...Lower inner peripheral surface, A... ...Curtain board, B...Concrete ceiling.

Claims (1)

[Claims] 1 A suspension bolt insertion hole is drilled through the center, a plurality of legs are integrally formed on the outer periphery, and one or more nails are circumscribed and approximately parallel to the suspension bolt insertion hole. The main body of the fixture is made of synthetic resin, and the hole is drilled in communication with the suspension bolt insertion hole, and a minute protrusion or thin wall part is formed in this communicating place. A nut that is threaded into the hanging bolt inserted into the bolt insertion hole, a nail that is inserted into the nail hole, and a synthetic resin that is installed on the upper part of the fixture body so as to overlap and cover the nut and washer. A lighting fixture or other fixture embedded in a concrete structure, characterized in that the lower inner circumferential surface of the inner cavity of the blind cover and the upper outer circumferential surface of the fixture body can be bonded together. .