JPH11306455A - Fire sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily check or exchange a fire sensor installed at a high place. SOLUTION: This fire sensor is provided with a fixed member 30 fixed to the member of the ceiling and a sensor attaching member 20 mounted inward the fixed member 30. The fixed member 30 has a cylindrical part 32 opening upper and lower faces and a flange part 31 protruded outward and inward on the downside of the cylindrical part 32, and the sensor attaching member 20 has a sensor attaching plate 21 for attaching the fire sensor on the side of its lower surface and a handle 25 for mounting the fire sensor 21 onto the fixed member 30 and taking it out of the fixed member 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire detector installed on a high ceiling.

[0002]

2. Description of the Related Art Conventionally, in order to perform a function test such as a heating test or a smoking test on a fire detector installed on a ceiling, a heating head or a smoking head is mounted on a rod-like support rod. Inspection was performed by using a dedicated inspection tool to contact the head with the fire detector.

[0003]

However, the fire detector installed on a high ceiling had to be constructed on a scaffold, and the above work had to be performed. Further, when replacing the fire detector due to the expiration of the type of the fire detector or the like, it was necessary to perform more difficult work.

[0004] In addition, when it becomes necessary to replace a fire detector or the like, a scaffold is required, so that there is a disadvantage that the fire detector cannot be replaced immediately. In addition, there was a problem that preparation and cost were required to build a scaffold.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a fire detector capable of easily checking or replacing a fire detector installed at a high place. It is in.

[0006]

According to a first aspect of the present invention, a fixing member fixed to a ceiling member and a sensor mounting member mounted inside the fixing member are provided. The fire sensor comprises a tubular part having upper and lower surfaces opened, and a flange part projecting outward and inward below the tubular part. The members are
A detector mounting plate for mounting the fire detector on its lower surface,
A handle for attaching the sensor mounting plate to the fixing member and removing the sensor mounting plate from the fixing member;

According to the second aspect of the present invention, the gap between the space above the ceiling and the lower part of the ceiling is eliminated by mounting the sensor mounting plate on the flange of the fixing member.

According to the third aspect of the present invention, a plurality of ceiling fixtures are provided on the outer wall of the tubular portion of the fixing member, and the ceiling fixture falls down when passing through the opening of the ceiling material. It has a fixed spring that opens after passing through the opening in the ceiling material.

[0009]

FIG. 1 shows a first embodiment of the present invention.
This will be described in detail with reference to FIG. FIG. 1 is an exploded perspective view of the fire detector, and FIG. 2 is a front view showing a partial cross section of the fire detector.

As shown in FIG. 1, the fire detector has a detector main body 10, a detector mounting member 20, and a fixing member 30. The sensor main body 10 includes a heat sensor, a smoke sensor, and the like, and has a sensor head 11 and a sensor base 12.

The sensor mounting member 20 includes a sensor mounting plate 21.
And a handle 25. The sensor mounting plate 21 is formed in a disk shape having an opening 22 in the center, and has a small opening for fixing the sensor base 12 and base mounting screws 28 and 2.
8 is provided. In addition, the sensor wiring 2 is provided in the opening 22.
3, 23 are inserted. The handle 25 includes two vertical plates 26, 26 erected from the sensor mounting plate 21, and the vertical plate 2.
And a horizontal plate 27 connecting the upper ends of the horizontal plates 6 and 26.

Next, the fixing member 30 will be described. The fixing member 30 is cylindrical and has a flange 31 at the lower end that protrudes outward and inward. The flange portion 31 is located below the ceiling 1, and the tubular portion 32 of the fixing member 30 is mainly located behind the ceiling. Two ceiling fixtures 3 are provided on the outer wall of the cylindrical portion 32.
3 and 33 are provided, and the fixing member 30 is attached to the ceiling 1 by sandwiching the ceiling 1 between the projecting pieces 34 and 34 and the flange 31. Also ceiling fixture 3
3 and 33 can be slid up and down, and can respond to the difference in the thickness of the ceiling material.
The ceiling fixtures 33, 33 may have a known structure. For example, Japanese Patent Publication No. 1-4, filed earlier by the applicant.
The structure of No. 3402 can also be adopted.

Next, a construction method and a maintenance (inspection) method of the fire detector will be described.

The construction work is performed by first fixing the fixing member 3 to the ceiling 1.
The hole 2 slightly larger than the 0 cylindrical portion 32 is formed. The fixing member 30 is inserted from below the ceiling 1 into the space behind the ceiling. The ceiling fixtures 33, 33 fall downward when the projecting pieces 34, 34 (fixing springs) pass through the opening 2 of the ceiling 1, and open after passing through the opening 2 of the ceiling 1 to open the ceiling 1 and the projecting pieces 34, 34. The fixing member 30 is held between the fixing member 34 and the fixing member 34. In addition, the lower surface of the ceiling 1 and the upper surface of the flange 31 can be fixed without a gap by the position adjusting action of the fixing screw 35.

After the fixing member 30 is mounted on the ceiling 1, the sensor main body 10 is mounted on the sensor mounting plate 21, and the sensor mounting member 20 and the sensor main body 10 are inserted into the fixing member 30 from behind the ceiling. The sensor mounting member 20 is lowered vertically so that the lower surface of the sensor mounting plate 21 contacts the upper surface side of the flange portion 31 of the fixing member 30. By mounting the sensor mounting plate 21 on the flange portion 31 of the fixing member 30, a gap between the ceiling and the lower part of the ceiling is eliminated, and a malfunction due to a gas flow (negative pressure) due to a temperature difference between the lower part of the ceiling and the lower part of the ceiling. And non-operation can be eliminated. When the fire detector is looked up from below the ceiling 1, the fire detector is very similar in appearance to a ceiling-mounted lighting device such as a downlight, and does not impair the beauty of the ceiling surface.

Next, a maintenance method will be described. At the time of inspection, the sensor mounting member 20
The handle 25 is pulled up and taken out of the fixing member 30, and if it is a smoke detector, a smoke test or the like is performed. With a heat sensor, a heating test or the like can be performed.

Also, when replacing the fire detector, holding the handle 25 of the detector mounting member 20 from behind the ceiling, pulling up the detector mounting member 20 and removing it from the fixing member 30, the sensor main body 10 is removed. Can be replaced.

[0018]

According to the first aspect of the present invention, the sensor can be inspected from behind the ceiling, and it is not necessary to perform the inspection with a scaffold even for a sensor at a high place.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the gap between the underside of the ceiling and the underside of the ceiling is eliminated, so that the gas flow due to the temperature difference between the underside of the ceiling and the underside of the ceiling. This has the effect that malfunctions and non-operations due to the above can be eliminated.

According to the third aspect of the invention, in addition to the effects of the first or second aspect of the invention, there is an effect that the fixing member can be easily attached to the ceiling material.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a fire detector according to an embodiment of the present invention.

FIG. 2 is a front view showing a partial cross section of the fire detector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ceiling 2 hole 10 sensor main body 11 sensor head 12 sensor base 20 sensor mounting member 21 sensor mounting plate 22 opening 23 sensor wiring 25 handle 30 fixing member 31 brim 32 cylindrical part 33 ceiling fixing 34 Fixed spring (projection piece)

Claims (3)

[Claims] 1. A fire detector comprising: a fixing member fixed to a ceiling member; and a detector mounting member mounted inside the fixing member, wherein the fixing member has a cylindrical shape with open upper and lower surfaces. And a flange portion protruding outward and inward below the cylindrical portion, wherein the sensor mounting member includes a sensor mounting plate for mounting a fire detector on a lower surface thereof, and a sensor mounting plate. A handle for mounting the plate on the fixing member and removing the plate from the fixing member. 2. The fire detector according to claim 1, wherein the sensor mounting plate is mounted on a flange of a fixing member to eliminate a gap between the ceiling and the lower part of the ceiling. 3. A plurality of ceiling fixtures are provided on the outer wall of the tubular portion of the fixing member, and the ceiling fixture falls down when passing through the opening of the ceiling material and passes through the opening of the ceiling material. 3. The fire detector according to claim 2, further comprising a fixed spring that opens rearward.