JP2508907Y2 - Fire detector mounting structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire detector mounting structure for mounting a fire detector on a ceiling surface or a wall surface in a semi-embedded state.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional example in which a fire detector is attached to a ceiling surface or the like in a semi-embedded state.
No. 06 publication). In FIG. 6, one side (left side of the figure) shows a state where the fire detector is attached to the thin ceiling board, and the other side (right side of the figure) shows a state where the fire detector is attached to the thick ceiling board. Indicates.

In the figure, 1 is a main body, 2 is a cylindrical body for accommodating connection terminals of a fire detector, and 3 is an upper bottom wall provided at an upper end portion of the cylindrical body 2 and having an opening 4 at the center thereof. 5a,
Reference numerals 5b are provided on both sides of the opening 4, and are screw insertion holes that are long in the radial direction as shown in FIG. 6a and 6b are openings 4
And a screw insertion hole 5a, 5b, respectively, and an upright wall which is provided upright between the upright wall 6a and 6b.
a and 7b are formed. 8a and 8b are standing walls 6a and 6
b and a recessed hole provided between the screw insertion holes 5a and 5b, 9
Is a collar portion provided at the lower end of the cylindrical body 2.

Numeral 10 is a stopper made of an elastic material, which is composed of a V-shaped portion 11 bent in a substantially V-shape and a bending piece 12 in which one end of the V-shaped portion 11 is bent at a substantially right angle. A vertically elongated slot 13 extending from the V-shaped portion 11 to the bent piece 12 is provided. Reference numeral 14 is a locking piece provided at the tip of the bent piece 12, and a hooking piece 15 is provided at the base of the locking piece. 1
6 is a fixing screw inserted into the screw insertion holes 5a and 5b, 17
Is a nut. 18a is a thin ceiling plate to which the fire detector is attached, 18b is also a thick ceiling plate, and 19 is a hole provided in the ceiling plate 18a (or 18b) for inserting the cylinder 2.

In the fire detector as described above, the fixing screw 16 inserted into the screw insertion holes 5a and 5b from below is inserted into the slot 13 of the fastener 10 and screwed into the nut 17. In order to attach the main body 1 to the ceiling plate 18a (or 18b), first, the fixing screw 16 is loosened, the locking metal fitting 10 is raised while moving along the fixing screw, and the hooking piece 15
Is inserted into the recessed holes 8a, 8b to stand up, and in this state, the main body 1 is inserted into the hole 19 until the flange portion 9 contacts the lower surface of the ceiling plate 18a (or 18b). Then, a finger, a screwdriver, or the like is inserted into the opening 4 and the locking piece 14 of the stopper 10 is pushed upward.

As a result, the hooking piece 15 is formed into the concave holes 8a, 8
After being separated from b, the fastener 10 is bent by the weight 12
It turns with the bent part of the fulcrum as a fulcrum, and falls into a lying state. When the ceiling plate 18a is thin, when the fixing screw 16 is tightened, the fastener 10 is pressed down by the nut 17, and the ceiling plate 18a is held and fixed by the tip portion of the V-shaped portion 11 and the collar portion 9.
Further, when the ceiling plate 18b is thick, a finger is inserted from the opening 4 and the locking piece 14 is picked up, and the stopper 10 is lifted to lock the hooking piece 15 to the upper edge of the standing walls 6a and 6b. As a result, the stopper 10 is brought into a laterally lying state with the hooking piece 15 as a fulcrum, and the main body 1 is fixed to the ceiling plate 18b in the manner described above.

[0007]

In the mounting structure for the fire detector as described above, the ceiling plates 18a, 1 of the main body 1 are provided.
When attaching to 8b, it is necessary to insert a finger or the like through the opening 4 of the main body 1 to adjust the posture of the stopper 10, so that the attachment is troublesome. Further, as the ceiling plates 18a and 18b to which the fire detector is attached, those having various thicknesses (for example, 1 mm to 50 mm) are used as described above, and therefore, the fixing angles of the stoppers 10 that hold the fire detectors are different from each other. To do.

As a result, since the fixing screw 16 is also fastened at an angle corresponding thereto, when the fixing screw 16 is a flat screw as shown in FIG. 6, the lower surface of the head is formed as an inclined surface. Therefore, as shown in FIG. 7, the shape of the head portion 16a contacting the lower edge 5c of the screw insertion hole 5a differs depending on the tightening angle of the fixing screw 16, and when the fixing screw 16 is strongly tightened, the lower edge portion of the screw insertion hole 5a is 5c and its surroundings were not preferred because they were damaged or traces remained. Also, the same problem occurs when a round screw whose bottom surface is horizontally formed is used as the fixing screw 16.

The present invention has been made in order to solve the above-mentioned problems. It is easy to attach the main body to a ceiling plate or the like, and even if the fixing screw is strongly tightened at an arbitrary angle, the lower part of the screw insertion hole is The purpose is to obtain a mounting structure for a fire detector that does not cause scratches or traces on the edge and its periphery.

[0010]

A fire detector mounting structure according to the present invention comprises a tubular body, an upper bottom wall provided at an upper end portion of the tubular body and having an opening at a central portion thereof, and an outer side of the opening. A radially long screw insertion hole provided in the upper bottom wall, a bearing portion provided on the upper bottom wall between the screw insertion hole and the opening, and a collar provided on the outer periphery of the lower end portion of the cylindrical body. Part, a long piece having a long hole and a short piece formed into a substantially L-shape, and a tip of the short piece rotatably mounted on a bearing portion of the main body, and a head having a substantially spherical shape. Or a top surface is formed into a substantially flat hemispherical shape, and the fixing screw is inserted into the elongated hole of the fastener through the screw insertion hole of the main body, and the nut into which the fixing screw is screwed on the outside of the fastener. And the stopper is rotated toward the opening around the bearing. Wherein the cylindrical body of the main body is inserted into the hole, such as the ceiling board is obtained by the ceiling plate by a flange portion of the stop member and the body by tightening the fixing screw so as to be fixed pinching.

[0011]

[Operation] Loosen the nut of the fixing screw and rotate the stopper around the bearing part toward the opening side. In this state, insert the cylinder of the main body into the hole such as the ceiling plate, and the flange part on the surface of the ceiling plate. Abut. Then, when the fixing screw is tightened, the stopper rotates in the direction opposite to the above with the bearing as the center, and holds the ceiling plate or the like between the collar and the flange to fix it. In this case, the head of the fixing screw is formed into a spherical or hemispherical shape even if the thickness of the ceiling plate or the like changes over a wide range and the angle of the fixing screw changes significantly.
Tightening the fixing screw will not cause scratches or marks on the lower edge of the screw insertion hole.

[0012]

1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a bottom view of a screw insertion hole portion thereof. The same parts as those in the conventional example described with reference to FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. Reference numerals 20a and 20b denote bearing portions provided on the upper bottom wall 3 so as to face each other between the screw insertion holes 5a and 5b and the opening portion 4. Reference numeral 21 is a stopper formed of a long piece and a short piece in an approximately L-shape. A long hole 22 is provided on the short piece side of the long piece, and a support portion 23 provided at the tip of the short piece has a bearing portion 20a. , 20b are rotatably mounted. As shown in FIG. 3, a fixing screw 24 is composed of a screw portion 25 and a substantially spherical head 26, and as shown in FIG. 4, even if the fastening angle of the fixing screw 24 is changed in a wide range, the screw insertion hole 5a is formed. , 5b is in constant shape.

Next, the operation of the present invention constructed as above will be described. First, the main body 1 is attached to the ceiling plate 18a (or 18
Before attaching to b), loosen the nut 27 and tilt the fixing screws 24 inward (center side). As a result, the fixing screw 24 moves within the elongated hole 22 of the stopper 21, and when reaching the end, the stopper 21 is pushed by the fixing screw 24 and the bearing portion 20.
A and 20b are rotated inward with the fulcrum as a fulcrum to be in a standing state. In this state, the collar portion 9 has the ceiling plate 18a (or 18
Insert the cylindrical body 2 into the hole 19 until it hits the surface of b).

Then, the fixing screw 24 is pulled down to rotate the stopper 21 outward with the bearings 20a and 20b as fulcrums, and the tip of the long piece is brought into contact with the ceiling plate 18a (or 18b). If the fixing screw 24 is tightened in this state, the ceiling plate 18a (or 18b) is sandwiched and fixed between the collar portion 9 and the stopper 21. In this case, even if the thickness of the ceiling plates 18a and 18b is changed over a wide range and the angle of the fixing screw 24 is changed, the head 26 of the fixing screw 24 is formed into a spherical shape, so that the set screw 20 is tightened to insert the screw. Holes 5a, 5b
There are no scratches or traces on the lower edge or its periphery.

FIG. 5 shows another embodiment of the set screw. In this embodiment, the upper part of the spherical head is cut out horizontally (at a right angle to the screw part 25) to form a substantially hemispherical shape. Head 26a. Even with this configuration, the same effect as in the case of FIG. 1 can be obtained.

[0016]

As is apparent from the above description, the mounting structure of the fire detector according to the present invention is such that the support portion of the stopper is attached to the bearing portion provided on the upper bottom wall of the main body so that the fire detector is rotatable. Since the head of the fixing screw for fixing the stopper is spherical or hemispherical, the fire detector can be easily and surely attached without being restricted by the thickness of the ceiling plate, etc.
In addition, no scratches or traces are formed on the lower edge of the screw insertion hole provided on the upper and lower walls and its periphery.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a bottom view of a screw insertion hole portion of FIG.

3 is a plan view, a side view, and a bottom view of the fixing screw of FIG. 1. FIG.

FIG. 4 is an explanatory view of the action of the fixing screw of FIG.

FIG. 5 is a plan view, a side view, and a bottom view of another embodiment of the fixing screw.

FIG. 6 is a sectional view of an example of a conventional fire detector.

7A and 7B are a plan view and a vertical sectional view for explaining the relationship between the screw insertion portion and the fixing screw in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Cylindrical body 3 Upper bottom wall 4 Opening 5a, 5b Screw insertion hole 9 Collar part 18a, 18b Ceiling board 19 Hole 20a, 20b Bearing part 21 Fastener 22 Long hole 23 Support part 24 Fixing screw 26 Head part 27 Nut

Claims (2)

(57) [Scope of utility model registration request] 1. A tubular body, an upper bottom wall provided at an upper end portion of the tubular body and having an opening portion in a central portion, and a threaded thread extending in a radial direction provided outside the opening portion and facing the upper bottom wall. A main body consisting of a hole, a bearing portion provided on the upper bottom wall between the screw insertion hole and the opening, and a flange portion provided on the outer periphery of the lower end portion of the cylindrical body, and a long piece and a short piece having long holes. Is a substantially L-shape, and the tip of the short piece is rotatably mounted on the bearing portion of the main body, and the head has a substantially spherical shape, and is fixed through the screw insertion hole of the main body. A fixing screw that is inserted into the elongated hole of the metal fitting, and a nut into which the fixing screw is screwed on the outside of the fastener, and the fastener is rotated in the opening side around the bearing portion. Insert the cylinder of the main body into the hole of the ceiling plate, etc., and tighten the fixing screw to stop the metal fitting. A mounting structure for a fire detector, characterized in that the ceiling plate and the like are sandwiched and fixed by and a collar portion of the main body. 2. A mounting structure for a fire detector, characterized in that, instead of the spherical head of the fixing screw, the head is formed in a hemispherical shape having a substantially flat upper surface.