JP2000268268A - Attaching device for exclusion cover of smoke fire detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching device for an exclusion cover of smoke fire detector which can safely and easily attach and remove the exclusion cover when the action of the detector arranged in a high place is cut off. SOLUTION: This device has an engage pin 10 which sticks out from a cover part which covers a detector 14 to cut off the action of the detector, an exclusion cover 1 which is equipped with a felt 3 which is fixed on a inner peripheral surface of the cover and elastically attached on an outer peripheral surface 15 of the detector 14, an attaching jig 11 which has a shaft direction groove 12a where the connection pin 10 can be penetrated and a rotation direction groove 12b which is releasably connected and a long operation rod of which the attaching device 11 is connected. The operation rod 17 is operated upward while the engage pin 10 is inserted inside the rotation direction groove 12b, the detector 14 is pushed into the exclusion cover 1 and fastens the exclusion cover. By inversely rotating and operating downward the operation rod 17, the connection pin 10 is pulled out from the rotation direction groove 12b and the shaft direction groove 12a and a connection of the exclusion cover 1 and the attaching jig 11 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting an exclusion cover of a detector, and more particularly, to a cover for excluding the operation of an abnormality detector installed at a high place or a dangerous place, for example, a smoke / fire detector, and mounting the cover. For jigs.

[0002]

2. Description of the Related Art When performing fire work (welding, fusing, or other work that generates smoke) in a facility where a smoke / fire detector is installed, it is necessary to turn off the power of the smoke / fire detector.
(1) Unfavorable for safety (it may be forgotten to turn on the detector power after work, or it may not be possible to turn off the power of only one detector), or
(2) Normally not permitted under the facility management regulations, so the smoke / fire detector is excluded to cover the smoke / fire detector in order to prevent it from detecting fire or smoke generated during normal work and operating. Attach the cover.

In factories and public halls,
A number of smoke / fire detectors may be installed on a ceiling having a height of 4 m or more. Conventionally, when attaching an exclusion cover to a smoke / fire detector installed at such a high place, a scaffold is assembled, and a person climbs on this scaffold, and the exclusion cover is directly attached manually.

[0004]

However, according to the above-mentioned conventional exclusion cover mounting method, it takes time and effort to assemble, disassemble and move the scaffold, and the cost is high. Also, since people need to climb to high places, it is necessary to take sufficient safety measures.

It is an object of the present invention to provide a simple exclusion cover attaching apparatus which can safely and easily attach and detach an exclusion cover when excluding the operation of a detector installed at a high place. It is.

[0006]

In the exclusion cover mounting device according to the present invention, the exclusion cover has an engaging portion projecting outward from the cover portion, and the mounting jig is rotated relative to the exclusion cover. A means for releasably engaging with the engaging portion of the exclusion cover is provided (first viewpoint). Further, in another exclusion cover mounting device according to the present invention, the exclusion cover includes an engagement pin projecting outward from the cover portion, and the mounting jig has a groove along a substantially rotation axis direction through which the engagement pin can be inserted. And a groove along the substantially rotational direction, and releasably engages with the exclusion cover when the engaging pin is located in the groove along the substantially rotational direction (second viewpoint). In still another exclusion cover attaching device according to the present invention, the exclusion cover includes a space extending substantially in the rotation axis direction, and a rotation direction rib extending substantially in the rotation direction opposite to the cover bottom surface, The mounting jig is formed so as to be releasably engaged between the cover bottom surface and the rotation direction rib by being inserted from a space extending in the rotation axis direction and relatively rotating along the rotation direction rib. A claw is provided (third viewpoint).

[0007] An example of a method of attaching an exclusion cover according to the present invention will be described. When attaching this exclusion cover to a detector installed at a high place, attach the above-mentioned mounting jig to the tip of a long operation rod, and rotate the mounting jig and the exclusion cover relative to each other. The engagement is performed such that the relative movement does not substantially occur in the rotation axis direction. In this state, the operation rod is lifted to position the exclusion cover immediately below the detector, and then the operation rod is further moved upward to push the detector into the exclusion cover and lock it. When the exclusion cover is locked to the detector, subsequently, the operation rod is rotated in a predetermined direction to release the engagement between the mounting jig and the exclusion cover. The removal operation of the exclusion cover may be performed in the reverse of the attachment operation, that is, the operation rod on which the attachment jig is attached is lifted and rotated in the opposite direction to the above so that the attachment jig and the exclusion cover are engaged. By manipulating and subsequently pulling downward, the lock between the exclusion cover and the detector is released and the exclusion cover is removed.

Thus, by using the exclusion cover attaching device according to the present invention, it is possible to safely and easily attach and detach the exclusion cover to a detector installed at a high place without assembling a scaffold. Can be. Therefore, even when many detectors are installed on the ceiling of 3 or 4 m or more, the exclusion work can be completed in a very short time. Moreover, since the exclusion cover attaching device according to the present invention has a simple structure, it can be manufactured at a low cost while being lightweight and excellent in operability.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described.

In the preferred embodiment of the exclusion cover attaching device of the present invention, the exclusion cover (1 in FIG. 1 (A), 20 in FIG. 6 (A)) serves as an engaging portion and extends outward from the cover portion. Projecting engagement pin (engagement pin 1 in FIG. 1A)
0) or an engagement cap (21 in FIG. 6B).
The mounting jig (11 in FIG. 1 (A), 26 in FIG. 7 (E)) is used as a means for releasably engaging with the engaging portion of the exclusion cover. 12 of 1 (B)
b) or a claw (28 in FIG. 7E).

Preferably, the claw portion of the mounting jig penetrates between the cover portion bottom surface of the exclusion cover and a rotation rib formed on the engagement cap, and the claw portion comes into contact with the cover portion bottom surface. It is engaged between the rotation direction ribs. More preferably, the claw portion comes into contact with the bottom surface of the exclusion cover when attaching the exclusion cover, and with the rotation direction rib when removing the exclusion cover, so that the attachment jig and the exclusion cover are engaged. Is done. Preferably, the engaging cap is provided with an axial rib extending substantially in the rotation axis direction, and the axial rib is rotated by a predetermined angle relative to the mounting jig. At this time, it is formed so as to abut (position) the claw portion of the mounting jig.

In the preferred embodiment of the exclusion cover mounting apparatus of the present invention, a bayonet structure is used to releasably engage the exclusion cover and the mounting jig.

In a preferred embodiment of the exclusion cover mounting device of the present invention, an elastic member (felt 3 in FIG. 1A) is provided on the inner peripheral surface of the cover portion of the exclusion cover, and the exclusion cover is attached to the detector. When the elastic member is pushed in, the elastic member comes into contact with the outer peripheral surface of the detector (15 in FIG. 1 (A)) and is compressed. It is releasably locked to the detector.

In a preferred embodiment of the exclusion cover attaching device of the present invention, an elastic member is provided on the inner peripheral surface of the cover portion of the exclusion cover, and when the exclusion cover is pushed into the detector, the elastic member is provided. Is releasably locked to the flange surface of the detector.

In a preferred embodiment, the exclusion cover mounting device of the present invention reciprocates in the radial direction of the detector when the exclusion cover is pushed up so as to be in sliding contact with the outer peripheral surface of the detector. A releasably fitting member is provided on the exclusion cover, thereby locking the exclusion cover to the detector.

In the preferred embodiment of the exclusion cover attaching apparatus of the present invention, the outer surface of the exclusion cover is colored with fluorescent paint or the like in order to prevent forgetting to remove the exclusion cover after the end of the fire work. The material of the exclusion cover may be any material as long as it can block a predetermined abnormal signal from being transmitted to the detector, and is preferably made of a plastic material for weight reduction.

In the preferred embodiment of the exclusion cover attaching device of the present invention, particularly when the detector does not have a portion for locking the exclusion cover, the ceiling near the detector is attached to the ceiling by means of suction, adhesion, hooks or the like. The exclusion cover is releasably locked.

In the preferred embodiment of the exclusion cover mounting apparatus of the present invention, a notch or window for reducing the weight is formed in the mounting jig. Thereby, the operability when moving the exclusion cover or the like at a high place by remote control is improved.

In the preferred embodiment of the exclusion cover mounting device of the present invention, the mounting jig is interchangeably fastened to the tip of the operating rod. In addition, an assembling type or folding type mesh rod can be used as the operation rod.

In a preferred embodiment of the exclusion cover mounting apparatus of the present invention, conventionally, a high place, a low place or a dangerous place where a scaffold must be assembled in order to mount the exclusion cover, for example, 3 to 4 m or more. It is suitably used to attach an exclusion cover to a detector installed on the ceiling of a car, especially a smoke / fire detector.

In the present invention, the type of detector to which the exclusion cover is attached is not particularly limited. For example, the present invention is applied to a detector for detecting an abnormality such as smoke, fire, light, radio waves, liquid, and temperature. Exclusion cover can be attached.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the preferred embodiments of the present invention described above, an embodiment of the present invention will be described below with reference to the drawings.

[Embodiment 1] FIG. 1A is an exploded configuration diagram of an exclusion cover attaching apparatus according to Embodiment 1 of the present invention, and FIG. 1B.
FIG. 2 is an enlarged axis side projection view of the mounting jig shown in FIG. Referring to FIG. 1 (A), the exclusion cover mounting apparatus includes an exclusion cover 1 mounted to cover a detector 14 installed on a ceiling at a high place, and a mounting that releasably engages the exclusion cover 1. It comprises a jig 11 and a long operation rod 17 to which the mounting jig 11 is fastened. The exclusion cover 1 is coated with a fluorescent paint in order to prevent forgetting to remove it.

FIG. 2 is a front view of the detector shown in FIG. Referring to FIG. 2, the detector 14 has a substantially cylindrical shape, and the upper surface thereof is installed in contact with a ceiling surface, and the outer cover 15 elastically removes the exclusion cover 1 shown in FIG. It can be locked, and has a detection unit 16 at its lower part for detecting abnormalities such as smoke and fire.

FIG. 3 is a top view of the exclusion cover shown in FIG. 1A, and FIG. 4 is a front sectional view of the same. Referring to FIGS. 3 and 4, the exclusion cover 1 protrudes obliquely downward from the outer peripheral surface of the bottomed bowl-shaped cover portion, and is provided with four engaging pins ( Bayonet pin) 10
The cloth band 2 adhered along the rotation direction (circumferential direction) to the vicinity of the opening edge of the cover portion on the inner peripheral surface of the cover portion, and the detector 14 shown in FIG. And the felt 3 is elastically contacted with the outer peripheral surface 15 and locked.

Each of the four engagement pins 10 is screwed into the small screw 4 projecting outward through a hole formed in the peripheral portion of the cover portion and the small screw 4 from the outside of the cover portion. It is wound around a nut 7 for fixing the small screw 4 to the cover portion via the first and second flat washers 5 and the spring washer 6, and a portion of the small screw 4 projecting outward from the cover portion. And a protection cap 9 fitted to the small screw 4 from above the protection tape 8.

FIG. 5A is a top view of the mounting jig shown in FIG. 1A, and FIG. 4 is a front sectional view of the same. 1 (B), 5 (A) and 5 (B), the mounting jig 11 is cylindrical with a bottom and has an operation rod 17 shown in FIG. 1 (A).
Fastened to the tip. On the peripheral surface of the mounting jig 11, four grooves 12 that releasably engage with the engagement pins 10 of the exclusion cover 1 shown in FIG. 4 are formed at regular intervals along the rotation direction (circumferential direction). In addition, a plurality of windows 13 for reducing the weight are formed on the peripheral surface and the bottom surface. Each of the four grooves 12 extends in an axial direction extending in the rotation axis direction, and inclining slightly downward from an end of the axial direction groove 12a basically along the rotation direction. And a rotation direction groove 12b. The engagement pin 10 is releasably engaged in the rotation direction groove 12b.

Next, a method of operating the above-described exclusion cover attaching device will be described.

Referring particularly to FIGS. 1A and 1B, when attaching the exclusion cover 1 to the detector 14, first,
The operator engages the exclusion cover 1 with the mounting jig 11 fastened to the tip of the long operation rod 17. Specifically, the operator inserts the four engagement pins 10 of the exclusion cover 1 into the axial grooves 12 a of the mounting jig 11, and then,
Is rotated along its circumferential direction. As a result, the engagement pins 10 move in the rotation direction grooves 12b, and the relative movement of the exclusion cover 1 and the mounting jig 11 along the rotation axis direction is disabled, and the engagement between the two is completed.

Next, the operator lifts the operation rod 17 to position the exclusion cover 1 immediately below the detector 14, and further operates the operation rod 17 upward (axially) to move the inner peripheral surface of the exclusion cover 1. And the outer peripheral surface 15 of the detector 14 is brought into sliding contact. Since the inner diameter of the felt 3 is slightly smaller than the outer diameter of the outer peripheral surface 15 (the sliding is preferably about 3 mm), the felt 3 is elastically compressed, and the elastic force acting in the center direction of the detector 14 is reduced. Occurs. The exclusion cover 1 is locked to the detector 14 by this elastic force.

Next, the operator rotates the operating rod 17 in the opposite direction to position the engaging pin 10 of the exclusion cover 1 in the axial groove 12a. Subsequently, when the operator moves the operation rod 17 downward, the engagement pin 10 passes through the axial groove 12a, and the engagement between the exclusion cover 1 and the mounting jig 11 is released. Thus, the mounting of the exclusion cover 1 is completed, and the fire work is performed below the detector 14 with the detector 14 covered and excluded by the exclusion cover 1.

After the completion of the fire work, the exclusion cover 1 is removed. Since the removal operation may be performed in a manner reverse to the mounting operation, the description of the mounting operation is referred to the description of the mounting operation. Shall be.

[Embodiment 2] FIGS. 6A to 7G are views for explaining an exclusion cover mounting apparatus according to Embodiment 2 of the present invention, and FIG. Front view, FIG.
(B) is a front view of the exclusion cover, and FIG. 6 (C) is FIG. 6 (B).
6 (D) is a sectional view taken along the line DD of FIG. 6 (C), and FIG. 7 (B) is an exploded view of the excluded cover shown in FIG. 6 (B). 7 (E) is a front view of the mounting jig, FIG. 7 (F) is a top view of the mounting jig shown in FIG. 7 (E), and FIG. 7 (G) is a sectional view taken along line GG of FIG. 7 (F). FIG. 4 is an exploded view of the mounting jig.

Referring to FIG. 6A, the second detector 32
Is similar to the detector 14 of the first embodiment,
Reference is made to the description of the detector 14 in the first embodiment.

Referring to FIG. 6B, the second exclusion cover 20 is different from the exclusion cover 1 of the first embodiment in that the engagement pin 1
It has a common structure except that it has an engagement cap 21 in place of 0, and the description of the exclusion cover 1 in the first embodiment will be referred to for the point that the structure is common.

Referring to FIGS. 6B to 6D, the second
An engagement cap is fastened to the bottom of the cover portion (cover body) of the exclusion cover 20. An outer circumferential surface of the engaging cap 21 is provided with a rotating rib 22 extending along the circumferential direction so as to face the bottom surface of the cover portion, and an axial direction extending along the rotating shaft direction from an end of the rotating rib 22. And three ribs including the rib 23 are formed at equal intervals.
A screw groove 25 is formed on the central axis of the engagement cap 21, and the screw 24 is screwed into the screw groove 25 so that the engagement cap 21 is fastened to the cover portion of the second exclusion cover 20. .

Referring to FIGS. 7 (E) to 7 (G), the second
The mounting jig 26 has a bottomed cylindrical shape, and includes three claw portions 28 including a portion protruding inward in the radial direction and three notches (spaces) 29 extending in the direction of the rotation axis in the circumferential direction ( (Rotational direction) at regular intervals. Second mounting jig 2
A screw hole 30 is formed in the center of the bottom surface of 6, and the second mounting jig 26 is fixed to the tip of the operation rod 17 by a screw 31 penetrating the screw hole 30.

Next, a method of operating the exclusion cover attaching device will be described.

Referring to FIGS. 6A to 7G, the second
Detector 32 with the exclusion cover 20 installed at a high place
When attaching to the second exclusion cover 2,
0 is engaged with the second mounting jig 26 fastened to the distal end of the long operation rod 17. Specifically, the operator inserts the three rotation ribs 22 of the second exclusion cover 20 into the three notches 29 of the second mounting jig 26, and then,
Is rotated along its circumferential direction. When the second exclusion cover 20 is rotated by a predetermined angle, the axial rib 23 comes into contact with the circumferential end surface of the claw portion 28 and is locked.
Then, the bottom surface of the cover portion of the second exclusion cover 20 is brought into contact with the upper surface of the claw portion 28, whereby the second exclusion cover 20 and the second mounting jig 26 are engaged. The second
When removing the exclusion cover 20, the second exclusion cover 20 and the second mounting jig 26 are engaged by the bottom surface of the claw portion 28 and the upper surface of the rotation direction rib 22 abutting against each other.

The following attaching and detaching operations are as follows:
Since the operation is the same as that described in the first embodiment, the description of the first embodiment will be referred to.

[0041]

According to the present invention, there is provided an exclusion cover attaching apparatus which can safely and easily attach and detach the exclusion cover and has a simple structure.

[Brief description of the drawings]

FIG. 1A is an exploded configuration diagram of an exclusion cover mounting device according to a first embodiment of the present invention, and FIG. 1B is an enlarged axial projection view of a mounting jig.

FIG. 2 is a front view of the detector shown in FIG.

FIG. 3 is a top view of the exclusion cover shown in FIG.

FIG. 4 is a front sectional view of an exclusion cover shown in FIG. 3;

5A is a top view of the mounting jig shown in FIG. 1A, and FIG. 5B is a front view.

6 (A) to 6 (D) are explanatory views of an exclusion cover attaching device according to Embodiment 2 of the present invention, (A) is a front view of a detector, (B) is a front view of an exclusion cover, (C) is a partially deleted top view of the exclusion cover shown in (B), and (D) is D in (C).
FIG. 3 is a cross-sectional view taken along line D, and is an exploded view of the exclusion cover shown in FIG.

FIGS. 7 (E) to (G) are explanatory diagrams of the exclusion cover attaching device according to the second embodiment of the present invention, following FIGS. 6 (A) to 6 (D), and FIG. (F) is a top view of the mounting jig shown in (E), (G) is G in (F).
FIG. 3 is an exploded view of the mounting jig shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Excluded cover 2 Cloth strip 3 Felt 4 Small screw 5 First and second washer 6 Spring washer 7 Nut 8 Tape 9 Screw cap 10 Engagement pin (bayonet pin) 11 Mounting jig (removal jig) 12 Groove 12a Axial groove 12b Rotational groove 13 Window for weight reduction 14 Detector 15 Outer peripheral surface 16 Smoke detector 17 Operation rod 20 Second exclusion cover 21 Engagement cap 22 Rotational rib 23 Axial rib 24 Screw 25 Screw hole 26 second mounting jig 28 claw 29 notch (space extending in the rotation axis direction) 30 screw hole 31 screw 32 second detector

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kozo Miyamoto 22 Fukushima Daiichi Nuclear Works, Fukushima Branch Office, Fukushima Branch, Okuma Town, Okuma-machi, Futaba-gun, Fukushima Prefecture (72) Inventor Atsushi Saiki, Futaba-gun, Fukushima Prefecture Okuma Town Ozawazawa Kitahara 22 Toden Kogyo Co., Ltd.Fukushima Branch Fukushima Daiichi Nuclear Power Plant (72) Inventor Go Go Irokawa Fukushima County Fukuba District Okuma Town Ozawa Ozawazawa Kitahara 22 Toden Kogyo Fukushima Branch Fukushima Daiichi Nuclear In-house (72) Inventor Yukihiro Wakisaka 22 Fukushima Daiichi Okuma-machi Ozawa Town Kitahara 22 Fukushima Branch Office Fukushima Daiichi Nuclear Power Plant (72) Inventor Koji Watanabe Okuma-machi Okuma Town Futaba County Fukushima Prefecture 22 character Kitahara Toden Kogyo Co., Ltd. Fukushima branch office Fukushima Daiichi Nuclear Power Plant F-term (reference) 5C085 AA03 AB01 AB09 CA08 FA11 FA 40

Claims (5)

[Claims] 1. A cover locked to cover the detector for temporarily excluding operation of the detector, the cover having an engagement portion projecting outward from the cover portion. A jig that is rotated and moved along a rotation axis direction by an indirect operation, the jig being relatively rotated with the exclusion cover to releasably engage with an engagement portion of the exclusion cover. A mounting jig provided with means; and an operating member to which the mounting jig is mounted and which is operated along a rotation operation and a rotation axis direction. 2. A cover locked to cover the detector for temporarily excluding operation of the detector, the cover including an engagement pin projecting outward from the cover portion. A jig that is rotated and moved along the rotation axis direction by an indirect operation, and includes a groove along the substantially rotation axis direction and a groove along the substantially rotation direction through which the engagement pin of the exclusion cover can be inserted. A mounting jig that releasably engages with the exclusion cover when the engaging pin is located in the groove along the substantially rotational direction; and the mounting jig is mounted, and An exclusion cover mounting device for a detector, comprising: an operation member operated along the detector. 3. A cover locked to cover the detector for temporarily excluding operation of the detector, wherein the cover extends substantially along the rotation axis direction and faces a bottom surface of the cover portion. An exclusion cover comprising: a rotation direction rib extending substantially along the rotation direction; and a jig moved in the rotation and rotation axis directions by an indirect operation, wherein the rotation of the exclusion cover Formed to be releasably engaged between the cover bottom surface of the exclusion cover and the rotation direction rib by being inserted from a space extending along the axial direction and being relatively rotated along the rotation direction rib. A mounting jig having a set claw portion; and an operating member to which the mounting jig is mounted and which is operated along a rotation operation and a rotation axis direction. . 4. An elastic member is provided on an inner peripheral surface of a cover portion of the exclusion cover, and when the detector is covered by the cover portion of the exclusion cover, the elastic member of the exclusion cover is attached to the detector. The exclusion cover mounting device for a detector according to any one of claims 1 to 3, wherein the exclusion cover is locked to the detector by elastic force by being pressed against an outer peripheral surface. . 5. The detector according to claim 1, wherein said detector is for detecting one or more abnormalities including smoke and fire, and is installed at a high place. An exclusion cover mounting device for a detector according to any one of the above.