JP4011063B2 - Avalanche detection device - Google Patents

Description

  The present invention relates to an avalanche detection device, and more particularly to an avalanche detection device that is installed on a slope where an avalanche or landslide may occur and detects the occurrence of an avalanche or landslide and generates a detection signal.

As an alarm device that is installed on a slope where an avalanche or landslide may occur and detects the occurrence of an avalanche or landslide and issues an alarm, for example, Patent Document 1 listed below proposes an alarm device shown in FIG. .
The alarm device shown in FIG. 10 has a plurality of detection devices 102 each provided with a buzzer 106 and a light emitter 108 at the tip end of a support column 100 erected on a slope where landslide or the like may occur. The units are connected to each other by the wire 104.
As shown in FIG. 11, the detection device 102 has a metal weight 114 at the tip of a wire 112 suspended from the ceiling in a rectangular body 110 provided with a buzzer 106 and a light emitter 108. A circuit board 122 in which a pendulum 116, a battery 120, and an alarm circuit are provided is provided.
The weight 114 of the pendulum 116 is disposed in the cylindrical contact portion 118. When the rectangular body 10 is inclined due to landslide or the like, the weight 114 and the contact portion 118 come into contact with each other, and an alarm circuit of the circuit board 122 is obtained. Becomes ON, and the buzzer 106 and the light emitter 108 operate.
Further, the buzzer 106 and the light emitter 108 operate even when the support column 100 is inclined by the wire 104 connected to the other unit when a landslide or the like occurs on the slope where the other unit is erected.
Japanese Patent Laid-Open No. 10-97690 (FIGS. 2 and 3)

According to the landslide warning device shown in FIGS. 10 and 11, it is possible to catch the movement of the slope, which is a sign of landslide, and it is possible to evacuate the person in the area where the landslide etc. reach quickly.
However, the pendulum 116 is used in the detection device 102 used in the alarm device such as landslide shown in FIGS. For this reason, in cold regions where the outside air temperature drops below the freezing point, when used as an avalanche or landslide detection device, frost adheres to the metal weight 114, cylindrical contact portion 118, etc. of the detection device 102, There is a possibility that malfunctions are likely to occur or the operation of the pendulum 116 becomes dull, and the accuracy of detecting avalanches and the like may be reduced.
Accordingly, an object of the present invention is to provide an avalanche detection device that can prevent malfunction and maintain the detection accuracy of an avalanche even when used in a cold region where the outside air temperature falls below the freezing point.

  As a result of repeated studies to solve the above problems, the present inventor has found that the pin extended from the main body of the microswitch provided so as to be positioned in the through-hole formed in the plate provided horizontally. When the tip is pressed by a ball that can be rolled on the plate, the transmission circuit that transmits the detection signal is turned off, the plate is tilted, the ball rolls, and the pin tip is released. The present inventors have found that an avalanche detection device that turns on the transmission circuit can be used even in cold regions where the outside air temperature falls below the freezing point, and has reached the present invention.

  That is, the present invention provides a detection device such as an avalanche, which is installed on a slope where avalanches and landslides are likely to occur and detects the occurrence of avalanches and landslides and generates a detection signal. The body portion so that the through hole formed in the plate body provided in parallel with a predetermined interval and the tip of the pin protruding from the body portion are located in the through hole formed in the plate body Is disposed between the substrate and the plate, and when the tip of the pin is pressed, the transmission circuit for transmitting a detection signal is turned OFF, and when the pressure at the tip of the pin is released, the transmission is performed. A micro-switch for turning on the circuit, and a resin sheet provided to cover the through-hole on one side of a plate having a through-hole in which the tip of the pin of the micro-switch is located inside And opening of the through hole And a resin ball mounted on the sheet body so as to be able to roll on the portion of the sheet body positioned on the opening of the through hole. When the ball is placed on the sheet body part, the sheet body is bent by the weight of the ball and positioned in the through hole. When the tip of the pin to be pressed is pressed, the transmission circuit for transmitting the detection signal is turned off, while the detection device installed on the inclined surface is inclined, and the ball rolls out from the position on the opening of the through hole, The bent part of the sheet body returns to substantially the same plane as the other part of the sheet body, the pressing of the tip of the pin is released, and the transmission circuit for transmitting the detection signal is turned on. Snow, characterized by being provided with cuts In the sensing device and the like.

  Further, the present invention provides an avalanche detection device that detects the occurrence of an avalanche or landslide and generates a detection signal, and is installed on a slope where an avalanche or landslide may occur. The body portion so that the through hole formed in the plate body provided in parallel with a predetermined interval and the tip of the pin protruding from the body portion are located in the through hole formed in the plate body Is disposed between the substrate and the plate, and when the tip of the pin is pressed, the transmission circuit for transmitting a detection signal is turned OFF, and when the pressure at the tip of the pin is released, the transmission is performed. A micro-switch for turning on the circuit, and a hole formed in a smaller diameter than the through-hole on one surface side of the plate body in which the through-hole in which the tip of the pin of the micro switch is located is opened, Micro located in the through hole A resin sheet provided so as to be positioned above the tip of the switch pin; and a resin ball mounted on the hole of the sheet so as to roll on the sheet. Then, on the portion of the sheet body located on the opening of the through hole, the detection device is installed on a slope, the substrate is adjusted horizontally, and a ball is placed on the hole formed in the sheet body When the portion of the sheet body located above the opening of the through hole is bent by the weight of the mounted ball, the tip of the pin located in the through hole is directly pressed by the ball, and a detection signal is transmitted. When the transmitting circuit is turned off and the detecting device installed on the inclined surface is inclined, the ball rolls out from the bent portion of the sheet covering the opening edge of the through hole, and the ball at the tip of the pin The direct pressing by is released and the detection signal is As Shin originating circuit are ON, it is also a sensing device, such as avalanche, characterized in that cuts are provided.

In the present invention, by providing the adjusting means for adjusting the substrate horizontally, the substrate can be easily leveled when the detector is installed on the slope.
Further, by forming three tongue pieces by three notches in the portion of the sheet body located on the opening of the through hole, when the ball is placed, the three tongue pieces with the weight of the ball When the ball rolls from the position on the open end and the plate body is inclined, the three bent tongue pieces are substantially flush with the other parts of the sheet body. I can return.
Furthermore, by providing a frame body on the plate body along the outer peripheral edge of the plate body, the range in which the ball can roll can be limited, and the ball can be easily placed on the through hole.

In the avalanche detection device according to the present invention, the detection signal is transmitted by setting the pin of the micro switch to the pressed state or releasing the pressed state using the weight of the ball placed on the sheet body so as to be able to roll. The transmission circuit is turned on and off.
For this reason, even if it is used in a cold area where the outside air temperature falls below the freezing point compared to when the transmission circuit for transmitting the detection signal is turned ON / OFF by electrical contact with and separation from the electrode of the weight of the pendulum Further, it is possible to eliminate the possibility of malfunction due to frost adhering to the electrode surface and the weight and the risk of degradation in detection accuracy due to dullness of the pendulum operation.
Furthermore, the detection device for avalanches and the like according to the present invention employs resin sheet bodies and balls that are less likely to adhere to frost than metal, so they are used in cold regions where the outside air temperature falls below the freezing point. In addition, the malfunction caused by frost adhesion can be eliminated as much as possible, and the detection accuracy can be maintained.
In addition, a notch is provided in the portion of the sheet body located on the opening of the through hole of the plate body. This notch makes the sheet body easy to be bent by the weight of the ball placed on the portion of the sheet body located on the opening of the through hole, and the pin located in the through hole is bent by the bent sheet body portion. On the other hand, when the ball is rolled out from the position on the through hole of the sheet body when the detection device such as avalanche is inclined and the tip is pressed, the bent part of the sheet body is substantially different from the other parts of the sheet body It quickly returns to the same surface and facilitates release of the pin tip. For this reason, the detection accuracy of a detection device such as an avalanche can be improved.

In addition, when the detection device according to the present invention frequently malfunctions due to vibration of a civil engineering machine or the like that is operated in the vicinity of the installed slope, the diameter of the microswitch pin is smaller than the through hole where the tip is located. The sheet body in which the perforation hole is formed is provided so that the perforation hole is located above the tip of the pin of the micro switch located in the through hole of the plate body, and the sheet body located on the opening of the through hole is provided. By providing a cut in the portion, it is possible to prevent frequent malfunctions of the detection device due to vibrations of the civil engineering machine or the like.
The reason is that the hole and the cut are formed in the portion of the sheet body located on the opening of the through hole, so that the portion of the sheet body located on the opening of the through hole is easily bent due to the weight of the ball. It has become. For this reason, even if the ball moves from the perforation hole of the sheet body due to vibration, the ball returned to the perforation hole of the sheet body due to vibration is positioned on the opening of the through hole. This is considered to be due to the fact that the portion of the sheet body is bent and the ball is quickly positioned at a predetermined position.

FIG. 1 shows a state in which an example of an avalanche detection device according to the present invention is installed on a slope where an avalanche or landslide may occur. An avalanche detection device 10 shown in FIG. 1 (hereinafter sometimes simply referred to as the detection device 10) is provided at the tip of a column 12 driven into a slope where an avalanche or landslide may occur.
A partial cross-sectional view of such a detection device 10 is shown in FIG. In this detection device 10, a substrate 16 is provided on a fixed plate 14 fixed to a tip end portion of a column 12 driven into a slope so that an inclination angle can be adjusted. The inclination angle of the substrate 16 can be adjusted by an inclination angle adjusting tool provided between the fixed plate 14 and the substrate 16. Such an inclination angle adjusting tool includes screws 18 a, 18 a, 18 a provided between the fixing plate 14 and the substrate 16, an adjustment knob 18 b screwed in the middle of each screw 18 a, and the substrate 16. It is comprised from the level 20 provided in the edge vicinity part. The substrate 16 can be adjusted horizontally by turning each of the adjustment knobs 18b, 18b, 18b while checking the inclination of the substrate 16 with the level 20.

A plate body 22 is provided in parallel to the other end portions of the support members 24, 24 having one end portion fixed to the substrate 16 with a predetermined interval with respect to the horizontally adjusted substrate 16. A through-hole 26 is formed in the central portion.
Between the substrate 16 and the plate 22, a micro switch 28 in which the tip of the pin 28 b protrudes from the main body 28 a is provided so that the tip of the pin 28 b is located in the through hole 26 of the plate 22. It has been. In the detection device 10 shown in FIG. 2, the main body 28 a of the microswitch 28 is fixed to a battery holder 30 provided on the substrate 16.

A resin sheet 32 is placed on the upper surface of the plate body 22 in which the through hole 26 is formed so as to cover the through hole 26, and the sheet body 32 covering the entire upper surface of the plate body 22 It is fixed to the plate 22 by a frame 34 disposed in the vicinity of the outer periphery. In addition to the function of fixing the sheet body 32 to the plate body 22, the frame body 34 also has a function of restricting the range in which the resin ball 38 placed on the sheet body 32 can roll as shown in FIG. 2. Have.
Further, as shown in FIG. 2, the plate body 22, the frame body 34, and the ball 38 are covered with a dome portion 40, and restrict the range in which the ball 38 can roll even when the plate body 22 is inclined.
The dome part 40 is also accommodated in a cylindrical outer cylinder part 42 in which a transmitter 44 that transmits a detection signal is housed.
The detection signal transmitted from the transmitter 44 is received by a receiver described later and issues an alarm.

In the detection apparatus 10 shown in FIG. 2, the portion of the sheet body 32 that is located on the opening of the through hole 26 placed on the upper surface of the plate body 22 and covers the through hole 26 has three cuts 36 a, 36 a, 36 a. Are formed on three triangular tongues 36b, 36b, 36b.
In this way, by forming the portion of the sheet body 32 covering the through hole 26 on the three tongue pieces 36b, 36b, 36b, as shown in FIG. 2, the portion of the sheet body 32 covering the through hole 26 is formed. When the ball 38 is placed, the tongue pieces 36b, 36b, 36b are easily bent into the through hole 26 due to the weight of the ball 38, and press the tip of the pin 28b constituting the microswitch 28.
The fact that the tip of the pin 28b is pressed by the ball 38 can be confirmed by turning on the switch 46 provided on the substrate 16 and turning on the LED 48.

A circuit diagram of the detection apparatus 10 shown in FIGS. 1 to 3 is shown in FIG. The microswitch 28 in the circuit diagram shown in FIG. 4 turns on a battery 30a inserted in the battery holder 30 and a transmitter circuit that includes a transmitter 44 that transmits a detection signal, and a confirmation circuit that includes the battery 30a, the switch 46, and the LED 48. -A switch that turns off.
Further, the signal from the transmitter 44 is received by the receiver 50, turns on the warning lamp 52, and issues an alarm (not shown) such as a buzzer. The receiver 50 and the warning lamp 52 are driven by a power source that is generated by the solar battery 54 and stored in a storage battery (not shown).
In addition, since the detection apparatus 10 shown in FIGS. 1-4 is each member sealed in the cylindrical outer cylinder part 42 in the airtight state, even if the detection apparatus 10 installed in the slope etc. is buried in snow. The detection signal can be transmitted from the transmitter 44 to the receiver 50.

As shown in FIG. 1, an adjustment knob is used to check the inclination of the substrate 16 of the detection device 10 provided at the tip of the support column 12 driven into the slope where avalanches and landslides are likely to occur while checking the inclination with a level 20. Each of 18b, 18b, and 18b is rotated and adjusted horizontally.
In the detection device 10 in which the substrate 16 is horizontally adjusted, as shown in FIG. 2, the triangular tongue pieces 36b, 36b, 36b formed in the portion of the sheet body 32 covering the through hole 26 of the plate body 22 are formed. When the ball 38 is placed and the tip of the pin 28b is pressed by the tongue pieces 36b, 36b, 36b that are pressed and bent by the ball 38, the transmission circuit is turned off. For this reason, the transmitter 44 is in a stopped state.
On the other hand, since the confirmation circuit is ON, the LED 48 is turned on by turning on the switch 46 of the confirmation circuit, and it can be confirmed that the pin 28b is pressed by the ball 38.

When the detection device 10 shown in FIG. 2 in such a state is inclined as shown in FIG. 5 due to an avalanche or landslide, the ball 38 is placed on the tongue pieces 36b, 36b, 36b covering the through hole 26. Roll out. For this reason, the tongue pieces 36b, 36b, 36b bent by the weight of the ball 38 return to substantially the same plane as the other portions of the sheet body 32, and the pressing of the tip of the pin 28b is released.
When the pressing of the tip of the pin 28b constituting the micro switch 28 is released, the transmission circuit is turned on as shown in the circuit diagram of FIG. 6, and a detection signal is transmitted from the transmitter 44. A signal from the transmitter 44 is received by a receiver 50 placed in the vicinity of a person, turns on a warning lamp 52, and issues an alarm (not shown) such as a buzzer.
For this reason, warnings such as the warning lamp 52 and the buzzer allow people in the vicinity to know early the occurrence of avalanches and landslides and evacuate early.

Further, when the detection device 10 is installed on a slope where a tree or the like exists, a twig of a tree or the like may collide with the detection device 10 due to a wind, and the detection device 10 may be temporarily inclined. Even in such a case, if the tilted detection device 10 can immediately return to the original state, the ball 38 rolled out from the position on the tongue pieces 36b, 36b, 36b covering the through hole 26 when the detection device 10 tilts. Immediately return to the position on the tongues 36b, 36b, 36b. For this reason, it is possible to substantially prevent an alarm such as a warning light or a buzzer from being activated by the primary inclination of the detection device 10.
Here, in the detection apparatus 10 shown in FIGS. 1 to 6, when the sheet body 32 is omitted, the tip of the pin 28 b of the microswitch 28 is reliably pressed by the ball 38 as shown in FIG. 7. The tip of the pin 28 b passes through the through hole 26 of the plate 22 and protrudes to the one surface side of the plate 22.
For this reason, even if a twig of a tree collides with the detection device shown in FIG. 7 due to the wind and the detection device is inclined primarily, but immediately returns to the original state, As shown in FIG. 7, the ball 38 rolling out from the position is easily disturbed by the tip of the pin 28 b protruding to the one surface side of the plate body 22 and cannot easily return to the original position. In this case, an alarm such as a warning light or a buzzer is activated and treated as a malfunction. If such malfunctions occur frequently, the reliability of the detection device is impaired.

Further, in the detection device 10 shown in FIGS. 1 to 6, civil engineering work or the like is performed in the vicinity of the installed inclined surface, and the detection device 10 vibrates due to vibration generated during the operation of the civil engineering machine. When the ball 38 rolls out from the portion of the sheet body 32 covering the hole 26, even if the ball 38 returns to the portion of the sheet body 32 covering the through hole 26 due to vibration, it is not easily positioned at a predetermined position. There are cases where malfunctions due to the above occur frequently.
In this case, as shown in FIG. 8, it is preferable to use a sheet body 56 in which a hole 56a having a smaller diameter than the through hole 26 where the tip of the pin 28b of the microswitch is located.
The sheet body 56 is provided on the one surface side of the plate body 22 so that the perforated hole 56a is located above the tip of the pin 28b of the microswitch in the through hole 26, and the sheet body 56 has a through hole 26a. A portion of the sheet body 56 located on the opening, that is, a portion of the sheet body 56 extending from the opening edge of the through hole 26 to the opening edge of the drilling hole 56a is formed into three fan-like shapes by three cuts 58a, 58a, 58a. The tongue pieces 58b, 58b and 58b are formed.

FIG. 9 shows the detection device 10 in which the sheet body 56 shown in FIG. 8 is provided on one surface side of the plate body 22. In FIG. 9, the same members as those of the detection apparatus 10 shown in FIGS.
When the substrate 16 of the detection device 10 shown in FIG. 9 is adjusted horizontally and the ball 38 is placed on the hole 56a of the sheet body 56, the sheet positioned on the opening of the through hole 26 as shown in FIG. Tongue pieces 36b, 36b, 36b formed on the body 56 are bent by the weight of the ball 38, and the tip of the pin 28b located in the through hole 26 is directly pressed by the ball 38. In this state, the transmission circuit that transmits the detection signal is in the OFF state.
The fan-like tongue pieces 58b, 58b, 58b of the sheet body 56 shown in FIG. 8 are easier than the triangular tongue pieces 36b, 36b, 36b of the sheet body 32 shown in FIG. Easy to bend.
Since the ball 38 positioned on the hole 56a in this manner is placed on the bent tongues 58b, 58b, 58b covering the opening edge of the through hole 26, the detecting device 10 is slightly inclined. However, the ball 38 rolls out from the hole 56a of the sheet body 56, releases the direct pressing by the ball 38 at the tip of the pin 28b located in the through hole 26, and the transmission circuit for transmitting the detection signal is in the ON state. And For this reason, the detection apparatus 10 shown in FIG. 9 also has detection accuracy capable of detecting even a slight movement of the slope, which is a precursor of an avalanche.
When the ball 38 temporarily moves from above the perforation hole 56 a of the sheet body 56, the tongue pieces 58 b, 58 b, 58 b bent by the weight of the ball 38 are substantially different from other parts of the sheet body 56. Return to the same plane.

On the other hand, in the detection device 10 shown in FIG. 9, when the detection device 10 vibrates due to vibration of a civil engineering machine or the like, the detection device 10 may be temporarily inclined to roll out from the hole 56 a of the sheet body 56. is there.
However, since the detection device 10 that is temporarily tilted by vibration returns to the vertical position immediately, the ball 38 returns to the hole 56a of the sheet body 56, and the tongue pieces 58b, 58b, and 58b are weighted by the ball 38. It bends easily and the ball 38 is immediately positioned over the drill hole 56a.
As a result, even if the detection apparatus 10 vibrates due to vibration of a civil engineering machine or the like, it is possible to substantially prevent an alarm such as a warning light or a buzzer from malfunctioning.
In this way, the detection device 10 shown in FIG. 9 has a detection accuracy capable of detecting even a slight movement of a slope, which is a sign of an avalanche, and can prevent a malfunction due to vibration of a civil engineering machine. Can be improved.

As described above, the detection device 10 illustrated in FIGS. 1 to 9 transmits the detection signal to the receiver 50 wirelessly, but may transmit the detection signal to the receiver 50 by a wire.
In addition, a plurality of detection devices 10 can be installed on an inclined surface where avalanches and landslides may occur, and the receiver 50 can determine at which position the detection signal is transmitted from the detection device 10. You may do it.

It is explanatory drawing which shows the installation state of detection apparatuses, such as an avalanche, concerning this invention. It is a fragmentary sectional view showing an example of detection devices, such as an avalanche, concerning the present invention. It is a partial front view which shows an example of the sheet | seat body used for the detection apparatus shown in FIG. FIG. 3 is a circuit diagram in a state of a detection device such as an avalanche shown in FIG. 2. It is a fragmentary sectional view which shows the state which inclined detection apparatuses, such as an avalanche shown in FIG. FIG. 6 is a circuit diagram in a state of a detection device such as an avalanche shown in FIG. 5. It is explanatory drawing explaining the case where the sheet | seat body 32 of detection apparatuses, such as an avalanche shown in FIG. 2, is abbreviate | omitted. It is a partial front view explaining the other example of the sheet | seat body used for the detection apparatus of this invention. It is a fragmentary sectional view showing other examples of detection devices, such as an avalanche, concerning the present invention. It is explanatory drawing explaining the conventional alarm device which detects generation | occurrence | production of an avalanche and landslide, and issues a warning. It is explanatory drawing explaining the internal structure of the alarm device shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Avalanche detection apparatus 12 Support | pillar 14 Fixing plate 16 Board | substrate 18a Screw 20 Level 22 Plate body 26 Through-hole 28b Pin 28 Micro switch 28a Main part 30a Battery 30 Battery holder 32, 56 Sheet body 34 Frame 36a, 58a Notch 36b 58b Tongue 38 Ball 40 Dome 42 Cylindrical outer cylinder 44 Transmitter 46 Switch 24 Support material 50 Receiver 52 Warning lamp 54 Solar cell 56a Drilling hole

Claims (5)

In a detection device such as an avalanche that is installed on a slope where an avalanche or landslide may occur and detects the occurrence of an avalanche or landslide and generates a detection signal,
A through-hole formed in a plate provided in parallel with a predetermined interval with respect to the substrate constituting the detection device;
The main body is disposed between the substrate and the plate so that the tip of the pin protruding from the main body is located in a through-hole formed in the plate, and the tip of the pin is pressed. A microswitch that turns off the transmission circuit that transmits the detection signal and turns on the transmission circuit when the tip of the pin is released.
A resin sheet provided to cover the through hole on one side of the plate body in which a through hole in which the tip of the pin of the microswitch is located is opened;
On the portion of the sheet body located on the opening of the through-hole, comprising a resin ball placed so as to be able to roll on the sheet body,
When the sheet is positioned on the slope of the sheet body located above the opening of the through hole, the substrate is adjusted horizontally, and the ball is placed on the sheet body portion, the ball The tip of the pin located in the through hole is pressed by the portion of the sheet body bent by the weight of the sensor, and the transmission circuit for transmitting the detection signal is turned off, while the detection device installed on the slope is When the ball rolls from a position on the opening of the through-hole, the bent portion of the sheet body returns to the same plane as the other portion of the sheet body, and the tip of the pin is pressed. A device for detecting avalanches or the like, characterized in that a notch is provided so that a transmission circuit for transmitting a detection signal is turned on when the is released. In a detection device such as an avalanche that is installed on a slope where an avalanche or landslide may occur and detects the occurrence of an avalanche or landslide and generates a detection signal,
A through-hole formed in a plate provided in parallel with a predetermined interval with respect to the substrate constituting the detection device;
The main body is disposed between the substrate and the plate so that the tip of the pin protruding from the main body is located in a through-hole formed in the plate, and the tip of the pin is pressed. A microswitch that turns off the transmission circuit that transmits the detection signal and turns on the transmission circuit when the tip of the pin is released.
A microswitch in which a hole formed in a smaller diameter than the through hole is located in one side of a plate body in which a through hole in which a tip of a pin of the microswitch is located is opened A resin sheet provided to be located above the tip of the pin,
A resin ball mounted on the hole of the sheet body so as to be able to roll on the sheet body;
In the portion of the sheet body located on the opening of the through hole, when the detection device is installed on a slope, the substrate is horizontally adjusted, and a ball is placed on the hole formed in the sheet body, Transmission that transmits a detection signal by bending the weight of the ball on which the portion of the sheet body positioned on the opening of the through hole is bent, and the tip of the pin positioned in the through hole being directly pressed by the ball When the circuit is turned off and the detection device installed on the slope is inclined, the ball rolls out from the bent sheet body portion covering the opening edge of the through hole, and directly by the ball at the tip of the pin. A device for detecting an avalanche or the like, characterized in that a cut is provided so that the transmission circuit for transmitting a detection signal is turned on when the pressure is released.   3. An avalanche detecting device according to claim 1, wherein an adjusting means for adjusting the substrate horizontally is provided.   The avalanche detection device according to any one of claims 1 to 3, wherein the sheet body portion located on the opening of the through hole is formed into three tongue pieces by three cuts.   The avalanche detection device according to any one of claims 1 to 4, wherein a frame body is provided on the plate body along an outer peripheral edge of the plate body.

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