JPH0124700Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mounting structure for electrical equipment such as fire detectors installed on the ceiling, and its purpose is to provide a mounting structure for electrical equipment that is easy to install. There is a particular thing.

Conventionally, the mounting structure of electrical equipment such as fire detectors is as shown in Figs.
By screwing together using the real mounting screws 27 and pinching the peripheral edge of the mounting hole 14 drilled in the ceiling plate 13 with the locking pieces 25a and 26a of both mounting brackets 25 and 26, the mounting bracket can be attached. 25 and 26 into the mounting holes 14, and the electrical equipment mounting base 1' is fixed to the lower mounting bracket 25 using two mounting screws 28.
A fire detector 20 such as a smoke detector or a heat detector is detachably attached to the cylindrical portion of the base 1'. 18 in the figure is a screw insertion hole made of an arcuate hole having a round hole portion 18a, and the mounting screw 28
into the mounting bracket 25 in advance, and then tighten the mounting screw 2.
8 protrudes from the bottom surface of the base 1' through the round hole 18a of the screw insertion hole 18, and the base is moved in the direction indicated by the arrow C.
After rotating as shown in FIG. 1, the base 1' is attached to the attachment hole 14 of the ceiling plate 13 by tightening the attachment screw 28. However, in such a conventional example, after first fixing the mounting brackets 25 and 26 to the mounting hole 14 using the mounting screw 27,
Since the base 1' is fixed to the mounting bracket 25 with the mounting screws 28, there is a disadvantage that there are many screw-fastening points, making the construction troublesome.
The present invention has been developed in view of the above drawbacks.

Examples will be described below using figures. Figures 4 to 7 show an embodiment of the present invention.
Reference numeral 1 designates a cylindrical electrical equipment mounting base with a closed upper end and an outwardly protruding flange 2 on the lower end periphery.The cylindrical portion of the base 1 is equipped with a fire detector such as a smoke detector or a heat detector. An electrical device 20 such as the one described above is installed in a detachable manner. The upper end closing wall 3 of this base 1
A screw insertion hole 5 into which the mounting screw 4 is inserted is provided around the periphery of the
The jig insertion hole 6, which is a square hole into which a jig 15 such as a driver is inserted, is 2 with the diameter as the axis of symmetry.
It is drilled in certain places. 7 is an F-shaped presser piece 8;
This is a mounting bracket formed by an upright piece 9 which is formed by bending the base of an F-shaped holding piece 8 at a substantially right angle, and a locking protrusion 1 that bites into the ceiling plate 13 is provided at the tip of the F-shaped holding piece.
0 is provided, and a jig engagement piece 9 is provided at the tip of the upright piece 9.
A is provided. Reference numeral 12 denotes a screw insertion hole formed of an elongated hole that spans the holding piece 8 and the upright piece 9 of the mounting bracket 7, and the mounting screw 4 is inserted from below into this screw insertion hole 12 and the screw insertion hole 5 of the base 1. By screwing the nut-shaped body 4a onto the tip of the mounting bracket 7, the mounting bracket 7 is attached to the upper surface of the base 1 so that it can be raised or lowered freely.
A jig engaging piece 9a provided at the tip of the upright piece 9 projects into the jig insertion hole 6. As shown in FIG. 8a, the cylindrical part of the base 1 is inserted into the mounting hole 14 bored in the ceiling plate 13 with the mounting bracket 7 erected, and the flange 2 is inserted into the mounting hole 14.
As shown in FIG. 8b, with a jig 15 disposed so as to abut the lower peripheral edge of the jig 15 and inserted through the jig insertion hole 6, the mounting screw 4 is tightened with the mounting bracket 7 laid down horizontally. The mounting hole 1 of the ceiling plate 13 is secured by the holding piece 8 of the mounting bracket 7 and the flange 2 of the base 1.
The base 1 is fixed to the mounting hole 14 of the ceiling plate 13 by sandwiching the four peripheral edges. In the figure, 16 is a power supply terminal, 17 is a wiring introduction hole, and a power supply fitting (not shown) provided on the sensor 20 can be freely connected to the power supply terminal 16.

FIG. 6 shows the upright and horizontal positioning of the mounting bracket 7, with the right half of the figure showing the upright state and the left half of the figure showing the horizontally lying state. Now, in the upright state, the mounting screw 4 is inserted into the upright piece 9 of the screw insertion hole 12 of the mounting bracket 7.
The end portion 9a of the jig engagement piece 9 projects into the jig insertion hole 6. In this state, the cylindrical portion of the base 1 is inserted into the mounting hole 14 of the ceiling plate 13 until the flange 2 comes into contact with the lower surface of the ceiling plate 13, as shown in FIG. 8a. Next, when the jig engaging piece 9a protruding into the jig insertion hole 6 is pushed upward (arrow A) with the jig 15 as shown in FIG. 8c, the mounting bracket 7 is laid down. When the mounting screw 4 is tightened in this state, the periphery of the mounting hole 14 of the ceiling plate 13 is held between the holding piece 8 of the mounting bracket 7 and the flange 2 of the base 1, and the base 1 is inserted into the mounting hole 14. Fixed. At this time, the locking protrusion 10 of the presser piece 8
Since this will bite into the ceiling plate 13, rotation of the base 1 is prevented. In addition, when the mounting bracket 7 is in a horizontal position, the mounting screw 4 moves toward the holding piece 8 side of the screw insertion hole 12 of the mounting bracket 7, and by appropriately adjusting this amount of movement, the ceiling plate It is designed to accommodate changes in thickness of 13.

The present invention is constructed as described above, and the base of the F-shaped presser piece is bent at a substantially right angle to provide an upright piece. Insert the above-mentioned mounting screw into the long screw insertion hole, screw the nut-shaped body onto the tip of the mounting screw, attach the mounting bracket to the top surface of the base so that it can stand up or down, and then stand the mounting bracket up. The cylindrical part of the base is inserted into the mounting hole drilled in the ceiling plate, and the nut-shaped body is positioned at the base of the holding piece while the mounting bracket is laid down and the mounting screw is tightened. , forming a screw insertion hole consisting of an elongated hole spanning the holding piece and the upright piece of the mounting bracket, and screwing a nut-shaped body onto the tip of the mounting screw inserted through the screw insertion hole;
Since the mounting bracket is attached to the top of the base so that it can be raised or lowered, the mounting bracket will not protrude into the center of the base when the base is inserted into the ceiling mounting hole with the mounting bracket upright. There is an effect that the electric wire can be easily introduced through the electric wire introduction hole provided in the center of the base. In addition, since the nut-shaped body is positioned at the base of the holding piece and the mounting screw is tightened, the nut-shaped body is prevented from rotating by the base of the upright piece and the holding piece. This has the effect that the mounting screw can be easily tightened without providing any means, and the configuration is simple.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a conventional construction method, Fig. 2 is a partially broken front view of the same as above, Fig. 3 is a bottom view of the same as above, and Fig. 4 is a partially broken front view of an embodiment of the present invention. Figure 5 is a bottom view of the same as the above, Figure 6 is a sectional view showing the operation of the same as the above, Figures 7 a and b are enlarged top views and enlarged sectional views of the same as the above, Figures 8 a and b are the same as the above. Figure c is an enlarged sectional view of the X section shown in figure b. 1 is the base, 2 is the flange, 3 is the upper end closing wall,
4 is a mounting screw, 4a is a nut-shaped body, 5 is a screw insertion hole, 6 is a jig insertion hole, 7 is a mounting bracket, 8 is a holding piece, 9 is an upright piece, 12 is a screw insertion hole, 13 is a ceiling plate, 14 is a mounting hole.

Claims (1)

[Scope of utility model registration request] A mounting screw is inserted from below around the upper end closing wall of a cylindrical electrical equipment mounting base, which has an electric wire introduction hole in the center of the upper end closing wall that closes the upper end opening, and an outwardly projecting flange at the lower end periphery. A long hole that spans the holding piece and the standing piece is drilled in the mounting bracket, which has a screw insertion hole for insertion, and an upright piece is provided by bending the base of the F-shaped holding piece at a substantially right angle. Insert the above-mentioned mounting screw into the screw insertion hole, screw the nut-shaped body onto the tip of the mounting screw, and attach the mounting bracket to the top surface of the base so that it can be raised or lowered freely. At the same time, with the mounting bracket lying down, position the nut-shaped body at the base of the holding piece and tighten the mounting screw, thereby attaching the periphery of the mounting hole in the ceiling board. A mounting structure for electrical equipment in which the mounting bracket is held between the holding piece of the mounting bracket and the flange of the base.