JPH0981873A - How to adjust the installation position of the scanning fire detector - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To make it possible to easily and accurately adjust the horizontal installation position of a scanning fire detector. SOLUTION: A visible light laser emitting device 26 installed at a position of a predetermined horizontal angle θ1 from a reference position of the monitored area in which the fire detector 11 is to be installed in the monitored area is provided with a predetermined position from a horizontal scanning start position. The visible laser light 27 is emitted toward the fire detector 11 which is horizontally scanned by the horizontal angle θ1. The visible laser light 27 is generated by the rotating mirror 1 of the fire detector 11.
The reflected light 28 is reflected by 7, and the reflected light 28 irradiates the surveillance area in a straight line from directly below the fire detector 11 to a direction of 90 degrees to form a bright line by the reflected light 28. The main body of the fire detector 11 is rotationally adjusted so that the bright line of the reflected light 28 and the optical axis of the visible light laser device 26 coincide with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire detector installation position adjusting method for adjusting a horizontal installation position of a scanning fire detector using a visible light laser emitting device.

[0002]

2. Description of the Related Art Conventionally, in order to monitor a fire in a large-scale building such as a competition facility or a convention center, a radiant energy from a flame generated by the fire is detected by two-dimensionally scanning a wide monitoring area to cause the fire. A scanning fire detector that outputs a signal and a fire source position signal is used.

As a scanning fire detector (hereinafter, simply referred to as a fire detector), a mirror scanning radiation detector disclosed in JP-A-62-255832 is known. A schematic configuration of this fire detector is shown in FIG. It has a rotating mirror 3 which is rotationally driven by a vertical scanning motor 2 attached to a housing 1. The rotating mirror 3 reflects an optical image of an object incident from a surveillance area 6 to a reflecting mirror 4 side, and further the reflecting mirror. The subject optical image reflected by 4 is received by the photoelectric conversion element 5. Although not shown, the reflection mirror 4 and the photoelectric conversion element 5
The photoelectric conversion element 5 receives only the light that has passed through the slit provided between the scanning areas, thereby defining the area of each scanning area.

In the detecting operation, the rotary mirror 3 is rotated at a predetermined angular velocity to scan the inside of the monitoring area 6 along the vertical direction Y, and every time one scan of the vertical direction Y is completed, a predetermined rotation angle is set in the horizontal direction. The housing 1 is rotated to X by a stepping motor (not shown) for horizontal scanning. The scanning area 6 is finely divided by the rotating mirror 3 to sequentially scan each scanning area, and the photoelectric conversion element 5 photoelectrically converts the detection signal into a detection signal corresponding to the intensity of the radiant energy. By comparing and judging with, it is judged in which scanning area in the monitoring area 6 the fire occurred.

The position of each scanning area obtained by subdividing the surveillance area is represented by a horizontal scanning angle θ and a vertical scanning angle α with respect to the start position of the scanning of the fire detector, and the fire detector scans when it is judged that there is a fire. The position (θ, α) of the section, that is, the fire source position is calculated and output from the time from the start position of the horizontal scanning motor and the vertical scanning motor and the number of steps. In addition,
The fire detector is, for example, θ = 0 to 180 degrees in the horizontal direction,
Scanning is performed in the range of α = 0 to 90 degrees in the vertical direction.

By the way, such a monitoring area and a scanning area are determined by the data of the design drawings before the building is completed,
A system including a fire detector will be manufactured. Therefore, when a wall is formed and the fire detector 1 is installed in a predetermined position, the reference position of the actual monitoring area of the building and the start position of the scanning of the fire detector are made to coincide with each other, and the range of the building monitoring area and the fire are matched. The scanning range of the detector must be matched. If the fire source is detected in a non-coincident state, the calculated fire source position (θ, α) will deviate from the actual position of the fire source. Due to this, when the fire source position is displayed on the CRT, the display position may shift, or if the water is discharged to the fire source position with a water gun, water will be discharged to a place that is off, so when installing the fire detector in the building, The fire detector installation position is adjusted so that the reference position of the actual monitoring area of the building and the start position of the scan of the fire detector coincide with each other.

A conventional method for adjusting the installation position of the scanning fire detector will be described with reference to FIG. For the adjustment, first, the fire detector 1 is installed at a predetermined position in the building. At the time of installation, adjust the fire detector 1 so that it is horizontal by a spirit level so as to eliminate the vertical shift. In this installation state, the horizontal range θ of the actual monitoring area of the building and the horizontal range θ'of the fire detector do not match, and as shown in the figure, they are shifted by Δθ in the horizontal direction. Then, adjust the installation position of the fire detector to eliminate this deviation. A gas stove 8 serving as a pseudo fire source is placed at a predetermined pseudo fire source position 7. The pseudo fire source position 7 is determined by reading a predetermined horizontal angle θ1 and vertical angle α1 from the reference position of the preset monitoring area 6 from the design drawing of the building and measuring the result. Next, the fire detector 1 is activated and driven by horizontal scanning by a horizontal angle θ1 from the position of the horizontal scanning start position (θ ′ = 0 degree) by manual scanning. In the horizontal scanning drive by manual scanning, for example, the horizontal angle θ1 itself may be input to the drive control unit to drive, or the number of steps of the horizontal scanning stepping motor corresponding to the horizontal angle θ1 may be calculated and You may enter the number of steps. Since the fire detector 1 faces the direction of the line 9 in the state after driving, the gas stove 8 is ignited in order to face the direction of the pseudo-fire source position 7, and on the screen of the display device such as the CRT. While monitoring the analog value of the amount of received light, move the fire detector 1 itself horizontally to the position where the analog value becomes the highest, and fix the fire detector itself at the horizontal angle position where the analog value reaches the maximum value. . By this adjustment, the reference position of the monitored area and the start position of the horizontal scanning of the fire detector coincide with each other, that is, the actual range of the monitored area and the scanning range of the fire detector coincide with each other.

However, in such a method of adjusting the installation position of the fire detector, the direction of the mirror 3 of the fire detector 1 is aligned with the position where the thermal energy emitted from the flame of the gas stove 8 is maximum. The fire detector 1 itself is pivotally adjusted to the installation position, but the flame of the gas stove 8 is not a spot but a certain width, for example, a gas stove 8 having a width of 1 m and a length of 50 cm is placed on a table. It is difficult to adjust the installation position of the fire detector 1 to match the direction of the simulated fire source position 7, which is the target spot, due to the use of the fire detector and the fluctuation of the flame caused by the wind. There was a deviation between the reference position of the surveillance area and the horizontal scanning start position of the fire detector 1. Further, the gas stove 8 must be prepared, and the fire detector 1 must be rotated while monitoring the analog value of the amount of received light, which makes the adjustment work complicated.

As a method of adjusting the installation position of the fire detector in the horizontal direction for solving such a problem, there is a method disclosed in Japanese Patent Application Laid-Open No. 5-1948 filed by the present applicant. In FIG. 11, reference numeral 1 denotes a scanning fire detector. A light emitting device 120 for emitting a highly linear visible ray, for example, a visible laser beam is provided on the front surface of a detection window 110 of the detector housing 10, and the light emitting apparatus 120 is provided. When the visible laser light 6 emitted from the light emitting element 130 such as a semiconductor laser in the inside is emitted to the rotating mirror 3, the visible laser light 6 is reflected by the rotating mirror, and the bright line 7 of the visible laser light 6 is reflected in the monitoring area 2. You can do it. As shown in FIG. 12, the adjustment work is performed by first erecting a pillar 300 as a reference target at a position of a predetermined horizontal scanning angle from the reference position of the monitoring area 6, and then using the same predetermined horizontal scanning of the fire detector. The horizontal scanning is stopped at the horizontal scanning angle, and the horizontal scanning is stopped at the horizontal scanning angle. In that state, the base 200 is rotationally adjusted so that the bright line 7 of the visible laser light 6 reflected by the rotating mirror 3 passes through the center of the column. , The reference position of the actual surveillance area of the building and the start position of the horizontal scanning of the fire detector should be matched.

[0010]

However, in such a method for adjusting the installation position of the scanning type fire detector, the light emitting device 120 for emitting visible light is included in the detector housing 1.
Since it has to be fixed to the front surface of the detection window 110 of 0, when a semiconductor laser which is optimal as the light emitting device 120 is used, there is a problem that the fire detector 1 itself becomes large and the cost increases. Also, the pillar 300 has to be erected in the adjustment-time monitoring area 6, and there is a problem that the work becomes complicated, and it has not been actually carried out.

[0011]

In order to achieve this object, the present invention is constructed as follows. The scanning fire detector to which the present invention is directed is to detect radiant energy from a surveillance area obtained by scanning the surveillance area in a horizontal direction step by step and by scanning the horizontal direction in a vertical direction with a rotating mirror. It is a scanning fire detector that judges a fire based on a signal.

According to the present invention as such a method for adjusting the installation position of the scanning fire detector, a predetermined horizontal angle is set from the reference position of the monitoring area in which the scanning fire detector is to be installed. A visible light laser emitting device is installed at a position of θ1, and the visible laser light is emitted from the visible light laser emitting device toward a scanning fire detector in a state of being horizontally scanned by a predetermined horizontal angle θ1 from a horizontal scanning start position. The scanning fire detector main body is irradiated so that the emission line of the visible laser light reflected by the rotating mirror of the scanning fire detector reflected by the rotating mirror of the scanning fire detector overlaps the optical axis of the visible light laser emitting device. Rotate horizontally to adjust the installation position.

Also, a flange having a L-shaped cross section and a circular hole into which the main body of the scanning fire detector is inserted is formed at the tip of the horizontal portion, and a mounting base for mounting the vertical portion on a wall and a flange. And a ring member which is held at a predetermined interval above and which rotatably and horizontally mounts the scanning type fire detector main body and mounts and fixes the scanning type fire detector on the ring member. The main body of the scanning fire detector is placed on the ring member so that the emission line of the visible laser light reflected by the rotating mirror of the scanning fire detector and the optical axis of the visible light laser emitting device may overlap with each other. Rotate horizontally to adjust the installation position.

Therefore, it is possible to easily and accurately match the reference position of the actual monitoring area of the building with the starting position of the horizontal scanning of the scanning type fire detector easily and accurately without raising a pillar as in the conventional case. The installation position of the detector body can be adjusted.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view for explaining a method for adjusting the installation position of a scanning fire detector according to the present invention. In FIG. 1, reference numeral 11 is a scanning fire detector (hereinafter referred to as a fire detector), and the fire detector 11 constantly monitors a monitoring area and detects infrared energy radiated from a flame when a fire occurs to detect a fire. Output signal and fire source position information. The fire detector 11 has a main body 16 having a conical turning portion 13 below the detector body cover 12, and a slit-shaped detection window 14 is formed in the turning portion 13.

As shown in FIG. 2, the swivel unit 13 is rotated by a horizontal scanning motor 15 which is a pulse motor in a horizontal direction with respect to the main body 16 in steps of, for example, 0.72 degrees.
It can be reciprocally rotated in the range of 0 degree. 17 has a rotating mirror,
The rotating mirror 17 is fixed to a shaft 18A of a vertical scanning motor 18 which is a DC motor, facing the detection window 14. The front and back surfaces of the rotary mirror 17 are mirror surfaces, and the vertical scanning motor 1
8 rotates at a constant speed of 45 degrees to scan the vertical scanning range of 90 degrees from immediately below to a horizontal plane at a distance.

Infrared light from the monitoring area is regulated by the detection window 14 within a range of 90 degrees in the vertical direction from immediately below to the horizontal plane, reflected by the rotating mirror 17, imaged by the objective lens 19, and reflected by the reflecting mirror 20. Reflected by the slit 2
The instantaneous field of view 22 is determined by 1, and then the condenser lens 2
The light is focused on the light receiving surface of the infrared sensor 24 by the light source 3. The instantaneous visual field 22 is a monitoring visual field when it is assumed that the rotating mirror 17 is stopped.

By rotating the horizontal scanning motor 15 stepwise and reciprocally in this manner, the revolving unit 13 is rotated in the horizontal direction, and the vertical scanning motor 18 rotates the rotary mirror 17 at a constant speed. While scanning in the vertical range up to 90 degrees and the horizontal range from 0 to 190 degrees, if a flame 25 occurs due to a fire as shown in the figure, the infrared light emitted from the disaster 25 will be detected by the detection window. 14
The light enters, is reflected by the rotating mirror 17, and is condensed by the infrared sensor 24 through the objective lens 19, the reflecting mirror 20, the slit 21, and the condenser lens 23.

When a control unit (not shown) judges that there is a fire based on the detection signal from the infrared sensor 24, the control unit outputs the fire signal and fire source position information in which the scanning position is calculated. Next, FIGS. 3 to 5 show how the fire detector 11 is attached to the wall. FIG. 3 is a plan view and FIG. 4 is a front view.
FIG. 5 is a side view. 3 to 5, reference numeral 41 denotes a wall on which the fire detector 11 is attached, and the wall 41 has a cross section of L.
A V-shaped mounting base 42 is fixed by bolts 43. As shown in FIG. 6, the mounting base 42 is formed with a plurality of screw holes 44 into which the bolts 43 are screwed, and a pair of arms 45 in the horizontal portion and the main body 16 of the fire detector 11 is inserted into the tip portions of the arms 45. A circular flange 46 is formed. A circular hole 47 is formed in the circular flange 46, and the body 16 is inserted into the hole 47. On the circular flange 46, the main body 16 is rotatably mounted in the horizontal direction, and a fixed ring member 48 is held. The ring member 48 and the circular flange 46 are provided with screws 49 at three positions.
Then, the horizontal level of the fire detector 11 can be finely adjusted by adjusting the rotation of these three screws.

Fine adjustment plates 50-1, 50-2, 50-3, and 50-4 are provided at four locations on the upper surface of the main body 16 with bolts 6.
The fine adjustment plate 50 has a long hole 51 formed therein, and a horizontal fixing screw 52 for fixing the fine adjustment plate 50 to the ring member 48 is inserted into the long hole 51. Fine adjustment plate 50
A hexagonal bolt 53 for moving the fine adjustment plate 50, that is, the main body 16 fixed to the fine adjustment plate 50 in the circumferential direction is provided on the ring member 48 outside the side walls 61 on both sides of -1.
It is provided through. The tip of the hexagon bolt 53 is in contact with the outer surface of the side wall 61 of the fine adjustment panel 51. With the horizontal fixing screws 52 of the fine adjustment boards 50-1 to 50-4 loosened, the hexagon bolt 5 on the opposite side of the direction to be moved
The main body 16 can be rotated in the circumferential direction with respect to the ring member 48 by screwing in 3 and pushing in the fine adjustment plate 50. By screwing the horizontal fixing screw 52 at a predetermined horizontal position, the main body 16 is slightly moved. It is fixed to the ring member 48 via the adjusting plate 50. In this way, the main body 16 is attached to the mounting base 4
It can be fixed in a predetermined horizontal position with respect to 2. A power cable 55 and a signal cable 56 are respectively pulled out from the main body 16. In addition, the mounting base 4
A bubble tube 57 is placed on the second member 2, and a bubble tube 58 is also placed on the ring member 48 and the main body 16. Reference numeral 59 is an inspection connector.

Returning to FIG. 1, reference numeral 26 is a visible light laser emitting device, and the visible light laser emitting device 26 measures the horizontal detection position of the fire detector 11 installed at a predetermined position in the monitoring area to detect a fire. The visible light laser emitting device 26 is arranged at a predetermined position in the monitoring area to adjust the installation position of the detector 11, and the visible light laser emitting device 26 emits the visible laser light 27 toward the detection window 14 of the fire detector 11.

The visible laser light 27 from the visible light laser emitting device 26 is reflected by the rotating mirror 17 when entering the detection window 14. Since the rotating mirror 17 is rotated by the vertical scanning motor 18 to scan up to 90 degrees in the vertical direction from directly below to the horizontal plane, the visible laser light 27 hits the rotating mirror 17 to become reflected light 28, and the reflected light 28 is illustrated. The monitoring area 6 in a straight line from directly below to the visible light laser emitting device 26.
It can be seen as a bright line of reflected light.

Here, as the visible light laser emitting device 26, for example, a helium neon laser oscillator 26A as shown in FIG. 7 is used. Helium neon laser oscillator 2
6A is attached to a mounting portion 32 provided at the tip of a support column 31 which is inserted into the united portion 30 of the three support legs 29 and stands upright. The helium neon laser oscillator 26A includes a support pillar 3
The height is adjusted by operating the lever 33 attached to 1. A power line 34 is drawn out from the rear end of the helium neon laser oscillator 26A,
It is connected to a power supply unit 35 of AC100V. The helium neon laser oscillator 26A is installed in the window 14 of the fire detector 11.
Helium-neon laser light 2 which is a visible laser light
Fire a 7.

When the emitted helium neon laser light 27 enters the window 14 of the fire detector 11, it is reflected by the rotating mirror 15 and becomes reflected light 28 which is linearly directed from directly below to the helium neon laser oscillator 26A. The monitoring area 6 is illuminated and forms a visible bright line. next,
A method of adjusting the installation position of the fire detector 11 using the visible light laser emitting device 26 will be described.

First, the fire detector 11 is installed at a predetermined position in the monitored area by using the mounting base 42. At the time of installation, the fire detector 11 is adjusted by rotating the screw 49 so that the fire detector 11 becomes horizontal by the bubble tubes 57 and 58, which are spirit levels. In this case, the hexagon bolt 53 and the horizontal fixing screw 52 are loosened.
Next, the pseudo fire source position 3 (θ1, α1) is determined. The pseudo fire point position 3 is determined from the result of reading the design drawing of the building and the result of actual survey. When the pseudo excessive point position 3 is determined by measuring from the reference position of the actual monitoring area of the building, the visible light laser emitting device 26 is installed at that position. Next, the fire detector 11 is activated to horizontally scan the horizontal scanning angle θ1 from the horizontal scanning reference position (position of 0 degree) and stop.

That is, in the horizontal scanning, the horizontal scanning motor 15 rotates the swivel part 13 of the fire detector 11 by the same horizontal angle θ1 as the horizontal angle θ1 of the pseudo fire source position, and stops, and then the detection window 14 rotates. The mirror 17 is directed toward the horizontal scanning angle θ1. The horizontal scanning drive of the fire detector 11 is performed by a horizontal angle θ with respect to a drive control unit (not shown) of the horizontal scanning motor 15.
You may drive by inputting 1 itself, horizontal angle θ1
It is also possible to calculate the number of steps of horizontal scanning corresponding to, and input the number of steps to drive.

Next, from the helium neon laser oscillator 26A installed at a position in front of the detection window 14 thus rotated by the horizontal angle θ1, the helium neon which is a visible laser beam toward the detection window 14 is emitted. Laser light 27
Fire. When the emitted helium neon laser light 27 does not enter the detection window 14, it is not reflected by the rotating mirror 17 and therefore the reflected light 28 does not return. In this case, the orientation of the helium neon laser oscillator 26A is adjusted so that the emitted helium neon laser light 27 enters the detection window 14.

The helium-neon laser beam 27 is used to detect the detection window 14.
When incident on the rotary mirror 17, the vertical scanning motor 18 rotates the rotary mirror 17 at a constant speed in the vertical direction of 90 degrees from directly below to the horizontal plane. Therefore, as shown in FIG. 28 is linearly irradiated to the monitoring area 6 from immediately below the fire detector 11 to 90 degrees in the vertical direction, and a bright line of the reflected light 28 is formed. When the emission line of the reflected light 28 overlaps the helium neon laser light oscillator 26A, the reference position of the surveillance area where the fire detector 11 should be installed and the start position of the horizontal scanning of the fire detector 11 match. I can confirm.

If the bright line of the returned reflected light 28 does not overlap the optical axis of the helium neon laser light oscillator 26A as shown in FIG. 8, the reference position of the actual monitoring area and the horizontal scanning of the fire detector 11 are performed. It can be immediately seen that the starting position deviates by Δθ. If there is a deviation, the fire detector 11 is displaced by the deviation so that the bright line of the reflected light 28 reflected by the rotating mirror 17 overlaps the helium neon laser oscillator 26A.
Rotate to make fine adjustments.

That is, the hexagonal bolt 53 that has been loosened so as to eliminate the deviation is screwed in and the fine adjustment plate 50 is pushed. Thereby, the main body 16 moves in the circumferential direction with respect to the ring member 48 together with the fine adjustment plate 50. When the bright line of the reflected light 28 overlaps with the helium neon laser oscillator 26A, tighten the four horizontally fixed screws 52 that have been loosened,
The main body 16 is fixed to the mounting base 42 via the ring member 48.

By this adjustment, the horizontal angle θ from the reference position of the surveillance area 6 in which the fire detector 11 is to be installed is horizontal angle θ1 and from the horizontal scanning start position of the fire detector 11 is horizontal angle θ.
The position scanned by 1 can be matched. Therefore, by adjusting the installation position of the fire detector 11, the reference position of the building monitoring area 6 and the start position of the horizontal scanning of the fire detector 11 can be matched, and as a result, the horizontal range of the building monitoring area can be obtained. The horizontal scanning range of the fire detector 11 can be matched.

In the embodiment of the present invention, the position of the horizontal angle θ1 from the reference position of the surveillance area of the building and the position of the fire detector scanned by the horizontal angle θ1 from the horizontal scanning start position coincide with each other. However, it is difficult to perform the adjustment work because the reference position of the monitoring area is often the corner of the building, so the adjustment work should be performed at the place moved by the predetermined horizontal angle θ1. I have to. If the position of the reference position is a place where the adjustment work is easy, the adjustment work may be performed at the reference position.

Although the helium neon laser light is used as the visible laser light 27 in the embodiment of the present invention, the invention is not limited to this, and any other device that emits visible light can be used. It can be anything. However, a laser that emits linear light is desirable. Further, before the visible light laser emitting device 26 is installed at the position of the predetermined horizontal angle θ, the fire detector 11 may be previously scanned by only the predetermined horizontal angle.

[0034]

As described above, according to the present invention, the visible light laser installed in the surveillance area at a predetermined horizontal angle θ1 from the reference position of the surveillance area where the fire detector should be installed. Visible laser light was emitted from the launching device toward the fire detector that was horizontally scanned by a predetermined horizontal angle θ1 from the horizontal scanning start position, and was reflected by the rotating mirror of the fire detector that is irradiated to the surveillance area. In order to adjust the installation position by horizontally rotating the fire detector main body so that the bright line due to the reflected light of the visible laser light and the optical axis of the visible light laser emitting device overlap, the pillar can be erected as before. Without doing
The visible light laser emitting device alone can easily and accurately adjust the installation position of the fire detector body so that the reference position of the surveillance area of the building and the start position of the horizontal scanning of the fire detector coincide with each other.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a method for adjusting the installation position of a scanning fire detector according to the present invention.

[Figure 2] Fire detector configuration diagram

FIG. 3 is a plan view showing a mounting state of the fire detector.

FIG. 4 is a front view showing a mounting state of a fire detector.

FIG. 5 is a side view showing a mounting state of the fire detector.

FIG. 6 is a diagram showing a mounting base.

FIG. 7 is a diagram showing a helium neon laser oscillator.

FIG. 8 is an explanatory diagram of the positional deviation between the reflected light and the fire detector.

FIG. 9 is an explanatory view of a conventional example.

FIG. 10 is an explanatory diagram of an adjustment method.

FIG. 11 is an explanatory diagram of another method for adjusting the installation position.

FIG. 12 is an explanatory diagram of adjustment work.

[Explanation of symbols]

 11: Fire detector (scanning fire detector) 12: Detector main body cover 13: Revolving part 14: Detection window 15: Horizontal scanning motor 16: Main body 17: Rotating mirror 18: Vertical scanning motor 18A: Axis 19: Objective lens 20: Reflector 21: Slit 22: Instantaneous field of view 23: Condenser lens 24: Infrared sensor 25: Fire 26: Visible light laser emitting device 26A: Helium neon laser oscillator 27: Visible laser light 28: Reflected light 29: Support leg 30 : Combined part 31: Supporting pillar 32: Mounting part 33: Lever 34: Power supply line 35: Power supply unit 41: Mounting wall 42: Mounting base 43, 60: Bolt 44: Screw hole 45: Arm 46: Circular flange 47: Hole 48 : Ring member 49: Screw 50-1, 50-2, 50-3, 50-4: Fine adjustment plate 51: Long hole 52: Horizontal fixing screw 53: Hexagon Belt 54: support plate 55: Power cable 56: signal cable 57, 58: bubble tube 59: inspection connector 61: accumbens

Claims (2)

[Claims] 1. A fire is judged based on a detection signal of radiant energy from the surveillance area obtained by scanning the surveillance area in a horizontal direction step by step and scanning each horizontal direction in a vertical direction by a rotating mirror. In the method for adjusting the installation position of the scanning fire detector, in the surveillance area, the visible light laser emitting device is installed at a position of a predetermined horizontal angle from the reference position of the surveillance area where the scanning fire detector is to be installed, The visible laser light emitting device irradiates visible laser light toward the scanning type fire detector in a state of being horizontally scanned by the predetermined horizontal angle from the horizontal scanning start position, and the scanning type irradiated to the monitoring area. Align the scanning fire detector body horizontally so that the emission line of the visible laser light reflected by the rotating mirror of the fire detector overlaps the optical axis of the visible laser emitting device. Installation position adjusting method of a scanning fire detector and adjusts the installation position and rotated to. 2. The method for adjusting the installation position of a scanning fire detector according to claim 1, wherein a circular hole is formed when the main body of the scanning fire detector is inserted into the tip of a horizontal portion having an L-shaped cross section. And a mounting base for mounting a vertical portion on a wall and a flange mounted at a predetermined interval on the flange for mounting and fixing the scanning fire detector main body so as to be horizontally rotatable. A ring member, wherein the scanning fire detector is installed on the ring member, and a bright line by the reflected light of the visible laser light reflected by the rotating mirror of the scanning fire detector irradiated to the surveillance area and the The scanning fire detector main body is horizontally rotated on the ring member to adjust the installation position so that the optical axis of the visible light laser emitting device overlaps with the scanning fire detector. Installation position adjustment method.