JPH08240476A - Earthquake annunciator - Google Patents

Abstract

PURPOSE: To provide a means which can give an alarm by detecting seismic intensity of an earthquake by a simple means. CONSTITUTION: An outside contact body 5 is housed in and supported within a vessel 2, and a plumb bob terminal 6 whose plumb bob is suspended by a suspending spring 8 is arranged in a central part of its inside, and a vibration detecting switch 4 is constituted. When lateral swinging in the arrow A1 direction or vertical swinging in the A2 direction acts on the vessel 2, the vessel 2 vibrates, but the plumb bob terminal 6 hardly moves, and the suspending spring 8 extends and contracts. When the outside contact body 5 comes into contact with the plumb bob terminal 6 by vibration of the vessel 2, the vibration detecting switch 4 is closed, and an alarm 13 is actuated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake alarm capable of promptly informing the general public of the seismic intensity when an earthquake occurs.

[0002]

2. Description of the Related Art The seismic intensity during an earthquake can be empirically understood by ordinary people, and is generally reported relatively quickly via information media such as television and radio. Since the vibration is not correctly transmitted to the human body when riding on, the presence or absence of an earthquake, the magnitude of the seismic intensity, and the like are often unknown, and the notification by the information medium is not immediately transmitted. And since there is no earthquake warning facility along the road or along the track, there is a risk of traveling without knowing the occurrence of a big earthquake, and when there is a vehicle or a collapsed building that caused an accident in the front of the course, There is a risk of collision with this.

[0003]

DISCLOSURE OF THE INVENTION The present invention is directed to
Installed along the railroad track or inside / outside the building, when an earthquake with a seismic intensity greater than a certain level occurs, an alarm can be generated according to the seismic intensity, and an inexpensive and easy-to-maintain alarm can be obtained. It is an issue.

[0004]

As a first means for solving the above-mentioned problems, as described in claim 1, an outer contact body having a cylindrical portion and a bottom portion is attached to the inside of the container to provide conductivity. A weight terminal having a weight is hung from the top of the container via a suspension spring in the center of the outer contact body with a space, and a vibration detection switch is constituted by the outer contact body and the weight terminal. It is characterized by connecting an alarm circuit to.

According to a second aspect of the present invention, as described in claim 2, an inner contact body is provided inside the outer contact body having a cylindrical portion and a bottom portion, the inner contact body being freely contactable with and separable from the outer contact body. A vibration detection switch is configured, the vibration detection switch is attached to the inside of the container, a weight is hung from the top of the container via a suspension spring at the center of the vibration detection switch with a gap between the vibration detection switch and the vibration detection switch. It is characterized by connecting an alarm circuit to the switch.

As described in claim 3, the third means is, in claim 1 or 2, characterized in that a plurality of earthquake alarms operating with different seismic intensities are integrally assembled.

[0007]

According to the means of the first aspect, the container and the outer contact body immediately vibrate due to an earthquake, but the weight terminal hardly vibrates due to inertia, and the suspension spring expands and contracts. When the seismic intensity is equal to or higher than a predetermined level, the cylindrical portion of the outer contact body comes into contact with the weight terminal when rolling, and when the body is vertically swinging, the bottom portion of the outer contact body receives the cushioning action of the buffer spring. When the weight terminal is touched, the vibration detection switch is turned on and an alarm is issued in any case.

According to the second aspect of the present invention, when the container vibrates due to an earthquake, both the outer contact body and the inner contact body of the vibration detection switch vibrate.
The container is pressed against the weight to reduce the distance between the weight and the contacts, and the vibration detection switch is turned on to generate an alarm.

According to the means of claim 3, the seismic intensity can be known by extracting the signal of the maximum seismic intensity from the plurality of activated earthquake alarms.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows an embodiment of the present invention, 1 earthquake alarm, 2 containers, 2 ₁ its lid, 3 beam for hanging weight, the beam 3, for example, create a cross is, each end is supported fitted in a recess provided in the rim of the container 2, the hanging portion 3 ₁ is provided at the center. The recess is not essential, and the beam 3 may be supported only by the rim. Then, the vibration detection switch 4 is installed inside the container 2. As the container 2, a transparent plastic container having an insulating property is desirable. Vibration detection switch 4 is made from the outer contact body 5 and Jutsumu terminal 6, the outer contact body 5 is made lightweight by those of the cup-shaped with a cylindrical portion 5 ₁ and the bottom 5 _2, said bottom 5 ₂
Are supported by the buffer spring 7 on the bottom of the container 2.

The weight 6 is, for example, an iron ball having a weight of 1 kg, is suspended from the beam 3 by a suspension spring 8, and is normally located in the approximate center of the outer contact body 5 and between the cylindrical portion 5 _1. provided spacing L _1, the distance L ₂ is provided between the bottom 5 _2.

A lead wire 9 is led out of the outer contact body 5 and a lead wire 10 is led out of the dead weight terminal 6 to the outside of the container 2.
Is attached to the base plate 12 by a fixed point 11,
A power supply 13 and an alarm device 14 are connected to the conductors 9 and 10. 10 ₁ is a main switch.

This earthquake alarm 1 is placed on the ground E or in a portion near the ground of a building, and the container 2 is moved in the same direction by the horizontal motion of the ground E in the direction of arrow A _{1 and} the vertical motion in the direction of A _2. Vibrate. However, since the weight terminal 6 tries to remain stationary due to inertia, the outer contact body 5 collides with the weight terminal 6 to close the vibration detection switch 4, and once closed, the alarm device 14 is activated. Then, a timer is used to generate an alarm by voice, screen, etc. for a certain period of time.

When the container 2 vibrates due to an earthquake and the outer contact body 5 collides with the weight terminal 6, an impact corresponding to the weight of the weight terminal 6 is about to occur on the outer contact body 5, but With respect to the shaking, the impact between the base plate 12 and the ground E is mitigated by the displacement
The shock is damped by the buffer spring 7 with respect to vertical vibration. However, if the container 2 is made to have a high strength, the container 2 is fixed to the ground, the buffer spring 7 is omitted, and the outer contact body 5 is omitted.
May be closely attached to the container 2.

Next, in the embodiment of FIG. 2, the vibration detection switch 1
5 is formed of double cup-shaped inner and outer contact bodies 16 and 17, and both of the contact bodies 16 and 17 are spaced apart by a spacer 18 made of a light weight elastic body. Are held, and lead wires 9 and 10 are connected to each. Although the weight 20 is suspended from the lid 3 by the suspension spring 8, it is merely a weight and is electrically unrelated to the alarm device 14.

When a vibration of an earthquake is applied to this device in the direction of arrow A ₁ or A ₂ and the vibration detection switch 15 collides with the weight 20, the switch 15 is sandwiched between the weight 20 and the container 2, The inner contact body 17 moves relative to the outer contact body 18 in the direction of the arrow a ₁ or the direction of a ₂ to make contact, and once contacted, the switch 15 is closed and the alarm 14 is activated. When the earthquake subsides, contact bodies 16 and 17 inside and outside, weight 2
0 returns to the illustrated state, and the alarm device 14 terminates its operation after a fixed time.

Next, the embodiment of the earthquake alarm 21 shown in FIG. 3 has the same structure as the embodiment of FIG. 1, but the earthquake alarms 1a, 1b, 1c having different detected seismic intensities are stacked in three stages. For example, the earthquake alarm 1a has the ability to detect a seismic intensity of 3 or more, the seismic intensity of 1b has an seismic intensity of 4 or more, and the seismic intensity of 1c has an seismic intensity of 5 or more. It has a size. The alarm device 22 includes the alarm devices 1a, 1b, 1
The one with the maximum seismic intensity of any of the signals in c is selected and operated, and the detected seismic intensity is displayed.

In the above embodiment, the cup-shaped outer contact bodies 5, 16 and inner contact body 17 are shown, but the shape is not limited to this, and the cylindrical portion is not limited as long as it is electrically connected. And the bottom may be separated. Further, it is preferable to use a solar cell as the power source 13 from the viewpoint of maintenance.

[0019]

As described above, according to the means of claim 1 or 2, since the container, the contact body, the weight, etc. are the main constituent members, the structure is simple, the operation is reliable, and the cost is low. It has the advantage that it can be manufactured. Therefore, a large number can be installed along the road or railroad track, and there is an effect that the occurrence of an earthquake and the lower limit of the seismic intensity can be known to predict or prevent the occurrence of an accident.

Further, according to the means of claim 3, by providing a plurality of seismic intensity detection switches having different detected seismic intensity,
It has the advantage that the seismic intensity can be known in detail and appropriate responses can be taken.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of another embodiment.

FIG. 3 is a perspective view of still another embodiment.

[Explanation of symbols]

1, 21 Seismic intensity alarm 2 Container 4, 15 Vibration detection switch 5 Outer contact body 6 Weight terminal 7 Buffer spring 8 Suspension spring 14 Alarm device 16 Inner contact body 20 Weight

Claims (3)

[Claims] 1. An outer contact body having a cylindrical portion and a bottom portion is attached to the inside of a container, and a conductive weight terminal is spaced from the top of the container through a suspension spring at the center of the outer contact body. The earthquake alarm is characterized in that a vibration detection switch is constituted by the outer contact body and the weight terminal, and an alarm circuit is connected to the vibration detection switch. 2. A vibration detection switch is constructed by providing an inner contact body that can come in contact with and separate from the outer contact body with a space provided inside the outer contact body having a tubular portion and a bottom portion. It is attached to the inside of the container, and a weight is hung from the top of the container via a suspension spring at the center of the vibration detection switch with a gap therebetween, and a circuit of an alarm device is connected to the vibration detection switch. And an earthquake alarm. 3. An earthquake alarm according to claim 1, wherein a plurality of earthquake alarms operating at different seismic intensities are integrally assembled.