JPH0241740Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an embedded base for embedded installation of an intruder detector, fire detector, etc. in a ceiling.

(Prior art) Conventionally, when installing a fire detector etc. in the ceiling, for example, as shown in Fig. 3, the ceiling plate 1
Insert the embedded base body 3 into the opening of the mounting hole 2, and insert the presser metal fitting 4 provided on the upper part of the embedded base body 3.
By tightening with screws 5, the ceiling plate 1 is sandwiched between the clamping part 4a and the collar 6a, and the embedded base is fixed to the ceiling.

(Problem to be solved by the invention) However, when inserting the embedded base body 3 into the mounting hole 2, the holding part 4a of the presser metal fitting 4 must be held at an angle of, for example, 180 degrees so that it does not protrude beyond the mounting hole 2. Rotate it and set it inside the upper part of the convex part of the embedded base body 3, and when tightening the screw 5, move the presser metal fitting 4 to the mounting position, that is, to the outside of the embedded base body 3 in conjunction with the rotation of the screw 5. It is necessary to take special measures to tighten the clamp so that it rotates, and if the presser metal fitting 4 does not rotate or stops midway, the ceiling plate cannot be reliably clamped, which is a problem.

In addition, even if the connection wire of the fire detector gets caught between the holding bracket 4 and the embedded base main body 3 when tightening the screws 5, the installation worker should check the installation status of the embedded base. If the screws 5 were to be tightened and fixed as they were, the sheathing of the connecting wires would be damaged and problems such as short circuits could occur.

(Means for solving the problems) This invention was made in view of the above problems.
In order to provide a recessed base that can be securely fixed while checking the installation status to the ceiling, multiple screw insertion holes are provided in the recessed base body to correspond to the multiple holding metal fittings placed on the upper part of the recessed base body. In the embedded base, which is fixed to the ceiling by tightening the corresponding presser metal fittings using screws from each screw insertion hole, there is a pair of screws between the screw insertion holes on the lower side of the pair of presser metal fittings and the outer periphery of the embedded base body. The holding fittings are provided with an opening for attachment adjustment that can be rotated around a screw, and are further provided with a stopper for stopping the pair of holding fittings in a facing state.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is an overall view showing an embodiment of the present invention.

First, the structure will be described. Reference numeral 10 indicates an embedded base body, and reference numeral 11 indicates a collar, which are integrally molded from the same member. 12 is a presser metal fitting with a screw 13 at one end.
A threaded portion is provided to be screwed together, and a bent holding portion 15 is provided at the other end. The embedded base body 10 is provided with a pair of screw insertion holes 16, and the screws 13 are inserted through the screw insertion holes 16 to remove the presser metal fitting 1.
The presser metal fitting 12 is attached to the embedded base main body 10 by screwing it to the threaded part 2. Reference numeral 17 denotes a stopper, which specifies the fixing position of the presser metal fitting 12. Screw insertion hole 1 on the lower side of the presser fitting 12
6 and the outer periphery of the embedded base body is an opening 18 that opens concentrically around the screw insertion hole 16.
is provided and used for adjusting the fixing position of the presser metal fitting 12 or checking the attachment state of the presser metal fitting 12.
Reference numeral 19 indicates a fixing hole for fixing the fire detector, and reference numeral 20 indicates a wire passage hole for passing a connection wire to the fire detector.

Next, the action will be explained. FIG. 2 is an explanatory diagram showing a state in which the embedded base of FIG. 1 is attached. Presser metal fitting 1
Rotate 180 degrees so that the clamping part 15 of No. 2 does not protrude outward from the mounting hole 22 and set it inside on the upper part of the convex part of the embedded base main body 10. Insert into. When tightening the screws 13, proceed with the work while checking the installation state of the presser metal fitting 12 through the opening 18. If the presser metal fitting 12 does not move to the correct position, insert a jig such as a screwdriver through the opening 18, Move the presser metal fitting 12 around the screw 13, and press the presser metal fitting 1.
2 are brought into contact and stopped by the stopper 7 at the position where they face each other and adjusted to the normal mounting position. In this state, the ceiling plate 21 is sandwiched between the clamping part 15 and the collar 11 by screwing the presser metal fitting 12 with the screws 13, thereby fixing the embedded base to the ceiling.

To attach the fire detector 23 to the embedded base, fix the base 23a of the fire detector to the embedded base body 10 with screws 25, and then
3a is provided with an engaging portion that engages with the fire detector body 23b, and the fire detector 23 is fixed to the embedded base by locking the fire detector body 23b to the base 23a.

In the above embodiment, the openings 18 were uniformly opened so that the opening areas on the front and back surfaces of the embedded base body 10 were equal; are different, so-called
Providing a tapered opening or an opening consisting of a plurality of holes opened intermittently on a concentric circle centered on the screw insertion hole 16 is effective without compromising the strength of the embedding base. A large opening can be obtained.

In addition, in the embodiment shown in Fig. 1, two openings were provided corresponding to the two presser metal fittings, but an appropriate number of three or more openings were provided in the embedding base body. By providing screw insertion holes, arranging a plurality of presser fittings corresponding to each screw insertion hole, and providing an opening between the screw insertion holes on the lower side of each presser fitting and the outer periphery of the embedded base main body, The embedded base can be more securely attached to the ceiling surface.

(Effects of the invention) As explained above, according to the invention, the embedding base body has a flange on the peripheral edge, the pair of presser metal fittings arranged on the upper part of the embedding base body, and the pair of presser metal fittings. In an embedded base that has a screw insertion hole provided in the embedded base body, and a screw that tightens the presser fitting with a screw from the screw insertion hole, the screw insertion hole that is the lower side of the pair of presser fittings and the embedded base. An opening for mounting adjustment is provided between the outer periphery of the main body and the pair of presser metal fittings can be rotated around a screw, and a stopper is further provided to stop the pair of presser metal fittings in a facing state. This allows you to easily check the installation status of the presser fitting through the opening, and even if the presser fitting does not move to the correct position when installing the embedded base, you can insert the jig through the opening. The mounting position of the presser fitting can be corrected, and the embedded base can be reliably mounted to the ceiling surface.

[Brief explanation of the drawing]

Figure 1 is an overall view showing one embodiment of the present invention;
The figure is an explanatory diagram showing the installed state of the embodiment shown in FIG. 1, and FIG. 3 is a sectional view showing the installed state of the conventional embedded base. 10...embedded base body, 11...tsuba, 12...
...Presser fitting, 13...screw, 15...clipping part, 1
6...screw insertion hole, 17...stopper, 18...
...opening, 19...fixing hole, 20...wire hole, 2
1...Ceiling board, 22...Mounting hole, 23...Fire detector, 23a...Base, 23b...Fire detector body.

Claims (1)

[Claims for Utility Model Registration] An embedded base main body having a flange on its peripheral edge, a pair of presser metal fittings arranged on the upper part of the embedded base main body, and a pair of presser metal fittings arranged on the embedded base main body corresponding to the pair of presser metal fittings. In an embedded base having a screw insertion hole provided therein and a screw for tightening the presser fitting with a screw from the screw insertion hole, the screw insertion hole and the outer periphery of the embedded base main body, which is the lower side of the pair of presser fittings, are provided. A mounting adjustment opening is provided between the pair of presser metal fittings so that the pair of presser metal fittings can be rotated around a screw, and a stopper is further provided for stopping the pair of presser metal fittings in a facing state. Embedded base.