JP2002310780A - Earthquake intensity indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake intensity indicator that can be set up in the living room or reception room of an ordinary house, contains no component which is broken by the vibrations of earthquakes nor consumables, can be maintained easily, and can indicate the intensities of earthquakes through simple operation. SOLUTION: This earthquake intensity indicator is constituted by arranging a plurality of magnets M1, M2, M3, M4, and M5 having different magnetic intensities which are made different from each other step by step on a supporting body 5 and magnetically hanging identical balls 2, 2, etc., from the magnets M1-M5, respectively, so that some of the balls may fall due to the vibrations of earthquakes. Consequently, the intensities of earthquakes can be indicated by showing the fallen balls and unfallen balls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic intensity indicator which can easily display the seismic intensity of an earthquake with a ball in a general home, workplace, office or the like.

[0002]

2. Description of the Related Art Conventionally, various types of seismometers such as a pendulum type, an electromagnetic type, an electric type, and an electronic type have been developed and used in combination to accurately measure vibration. These seismometers are installed in tunnels and underground seismic stations that are completely free of vibrations associated with the activities of human society and are not easily affected by changes in temperature and pressure. These seismometers are inadequate for general households to purchase and use, because the equipment is sophisticated and expensive. The seismic intensity indicator for ordinary households has not been developed much, and it has not been put into practical use yet. Did not. Therefore, as a seismic intensity indicator for ordinary households, a vibration reference device, a vibration inspection device, and the like have been devised, and Japanese Patent Application Laid-Open Nos. 8-297168 and 59-14592 have been proposed.
No. 6 discloses this. In the following,
This will be described with reference to FIGS.

FIG. 6 is a perspective view showing a seismic intensity standard device capable of displaying seismic intensity. As shown in FIG.
Has a surface plate 31 fixed to the ground, and a plurality of columnar bodies 32 having different vibration destruction strengths are arranged on the upper surface of the surface plate 31. FIG. 7 is an enlarged perspective view showing the columnar body 32 of the seismic intensity standard and fixing means for fixing the lower part of the columnar body 32.
As shown in FIG. 7, the columnar body 32 includes a columnar portion 33, a fixing member 34, and a weight 35. The columnar portion 33 is formed of, for example, sand mixed with a binder such as cement.
By changing the mixing ratio of the binder, it is formed so as to be destroyed at a seismic intensity corresponding to the 7th JMA seismic intensity class. Surface plate 3
The upper surface of 1 is provided with seven fixing holes 36, and a pressing plate 37 is provided on the front side surface of the fixing holes 36,
By turning the handle 38 on the front side, the push plate 37 is pushed out, and the columnar body 32 is pressed to have a fixing means capable of fixing the lower part of the columnar body 32. With this configuration, the class of the seismic intensity class of the earthquake can be objectively displayed by visually checking the columnar body 32 destroyed by the occurrence of the earthquake. For example, in FIG.
If it is destroyed, it is known as seismic intensity 3.

FIG. 8 is a sectional view showing a vibration detecting device. As shown in FIG. 8, the vibration detection device is small, lightweight, and suitable for detecting vibration in ordinary households.
It is an inexpensive device. The ball 42 is suspended by the magnetic force of the holder 41. In this vibration detecting device, if there is a vibration equal to or more than a certain value, the ball 42 separates, and the electric circuit switch 47 is operated by the weight of the separated ball 42 to activate a sound generating device, a light generating device, and the like incorporated in the electric circuit. It is intended to be activated. When this device is used for earthquake vibration detection, when an earthquake involving a vibration exceeding a certain value occurs, the ball 42 separates due to the vibration and the switch 47 is turned on, so that a signal by sound, a signal by light, etc. are emitted. It is possible to instantly notify the occurrence of an earthquake.

[0005]

However, in the case of the seismic intensity standard shown in FIG. 6, even if the seismic intensity standard can be installed in a garden for general household use, if the columnar portion 33 is broken, sand is scattered and the sand is scattered. However, there is a problem that it is not easy to bring it into a living room or a reception room because it takes up space. In addition, if the columnar portion 33 is destroyed, it needs to be replaced anew. Further, if the columnar portion 33 is stored in excess, it is similarly destroyed by the earthquake at that time, and there is a problem that maintenance is difficult. Further, in the case of the vibration detecting device shown in FIG. 8, the ball 42 is used for switching, and with one ball 42, even if an alarm can be activated, it is difficult to display the seismic intensity. Was. In addition, a battery and a power supply are required, and consumables are generated, so that there is also a problem in economy.

Accordingly, the present invention has been made in order to solve the above-mentioned problems, and can be installed in a living room or a reception room of a general home, and there is no breakage or consumable parts due to the vibration of an earthquake, and maintenance is not required. It is an object of the present invention to provide a seismic intensity indicator which can display an earthquake intensity with a simple and simple operation.

[0007]

According to a first aspect of the present invention, there is provided a seismic intensity indicator according to the first aspect of the present invention, wherein a plurality of magnets having different magnetic forces are provided on a support in a stepwise manner, and the magnet is provided on the magnet. It is characterized in that balls of the same diameter are magnetically attached, and the balls are detached by vibration.

According to the invention of the seismic intensity indicator according to the first aspect, the magnet having the stepwise different magnetic force is a ball (iron ball) having a suitable diameter (mass) of the JMA seismic intensity class. A magnet that has enough magnetic force to be separated by vibrations appropriate for each class. For example, by disposing a plurality of magnets having different magnetic forces in a stepwise manner on the lower surface of a horizontally supporting support, magnetizing balls of the same shape and suspending the magnets, the vibration at the time of the earthquake, Release the ball. Also, in the case of a weak seismic intensity that does not lead to the ball detachment, for example, an earthquake corresponding to a seismic intensity 1, it can be displayed by shaking the ball. In other words, the seismic intensity indicator can instantly and objectively display the seismic intensity of the seismic intensity indicator by using the ball that has separated or the ball that has not separated, so that the seismic intensity of the earthquake can be quickly known and reflected in subsequent actions. . The seismic intensity indicator of the present invention has high durability because there is nothing to be destroyed or damaged by the vibration of the earthquake, so it can be used repeatedly, requires no maintenance, and has no power supply for driving and no consumable parts. Therefore, it is economical and can be reduced in size and weight.

According to a second aspect of the present invention, there is provided a seismic intensity indicator, wherein a plurality of magnets having the same magnetic force are arranged on a support, and balls having different outer diameters are magnetically attached to the magnets so as to vibrate. In response, the ball is detached.

According to the invention of the seismic intensity indicator described in claim 2, a plurality of magnets having the same magnetic force are provided, and the mass of the ball is set so that the ball separates due to the vibration corresponding to each class of the JMA seismic intensity class. Is gradually changing. For example, a plurality of magnets having the same magnetic force are arranged on the lower surface of a horizontally supported support, and balls with different masses are magnetically attached and suspended in a step-by-step manner. Let it. In the case of a weak seismic intensity that does not lead to the ball detachment, for example, an earthquake corresponding to a seismic intensity 1, it can be displayed by shaking the ball in the same manner as described above. That is, similarly to the above, the seismic intensity indicator can instantaneously and objectively display the seismic intensity of the seismic intensity indicator by means of the separated ball and the non-separated ball, and the seismic intensity of the seismic intensity can be quickly known and reflected in subsequent actions. be able to. Further, by making the magnets of the seismic intensity indicator of the present invention exactly the same, the assembling work of the magnet is simplified, and a defective product due to a simple mistake or misunderstanding does not occur, so that a seismic intensity indicator with stable quality can be obtained. Further, the size and weight can be reduced.

According to a third aspect of the present invention, there is provided the seismic intensity indicator according to the first or second aspect, wherein the magnetic poles of the plurality of magnets are aligned with one of the S pole and the N pole, It is characterized by being arranged at equal intervals.

According to the third aspect of the present invention, the magnetic poles of the magnets are arranged so as to be aligned with either the S pole or the N pole and are arranged at equal intervals, so that the magnetic field lines of the magnets interfere with each other. Can be avoided to a minimum, so that the ball can be stably magnetized.

According to a fourth aspect of the present invention, there is provided the seismic intensity indicator according to the first or second aspect, wherein the magnetized surface of each magnet is the same as the surface of the support, or It is characterized in that it protrudes from the surface of the support.

In the invention described in claim 4, for example, when each of the magnets is buried in the surface of the support and enters a hole to form a dent (concave) shape, the ball swings greatly. Colliding with the edge of the hole of the support, and is easily separated (dropped). Therefore, by making the magnetized surface of each magnet the same as the surface of the support or protruding from the surface of the support, it is possible to prevent accidental detachment. Note that the protrusion amount here is preferably 3 mm.

According to a fifth aspect of the present invention, there is provided the seismic intensity indicator according to the fourth aspect, wherein:
It has a protective cap made of a non-magnetic material.

According to the fifth aspect of the present invention, since the non-magnetic protective cap is provided on the magnetically attached surface of each of the magnets, the surfaces of the magnets are separated or abraded by the sliding of the ball due to the vibration of the earthquake. Thus, the fine powder of each magnet can be prevented from adhering to the surface of the ball. Further, if fine powder of the magnet is interposed between the ball and the magnet, the magnetic force accuracy is reduced, but this can be prevented. In addition, the fine powder of the magnet
It is possible to prevent the surface of the ball finished to have a glossy spherical surface from being stained and the gloss from being lost. As a result, the mirror surface of the ball surface can be maintained forever, so that maintenance is easy and the appearance can be maintained.
The material of the protective cap made of a non-magnetic material is 18-8.
The thickness of the stainless steel plate is preferably 0.1 to 0.2 mm.

According to a sixth aspect of the present invention, there is provided the seismic intensity indicator according to the first or second aspect, wherein a pedestal is provided immediately below the support to prevent the ball detached from the pedestal from falling. It is characterized by having provided a fence to do.

In the invention described in claim 6, by providing a fence on the outer peripheral portion of the upper surface of the cradle, the ball can be secured in the cradle and the ball can be prevented from rolling down on the floor.

The invention described in claim 7 is the seismic intensity indicator according to claim 6, wherein the pedestal has a weight and a rubber plate is provided on a lower surface.

In the invention described in claim 7, the weight can be lowered by providing a weight on the cradle, so that even if the seismic intensity indicator receives a vibration caused by the occurrence of the seismic intensity 5 or more, Falling can be prevented. In addition, the rubber plates provided at the four corners on the lower surface of the cradle make it difficult to slip and allow stable seating.

[0021]

(First Embodiment) A seismic intensity indicator 1 according to the present invention will be described with reference to the drawings. FIG. 1A is a perspective view showing the entire view of the seismic intensity indicator 1 according to the present invention. As shown in FIG. 1A, a seismic intensity indicator 1 according to the present invention includes a support 5 on which permanent magnets M <b> 1 to M <b> 5 having different magnetic forces are provided in a stepwise manner, and a support for supporting the support 5, for example. , 6 and 6, a pedestal 7, and iron balls 2, 2,... Suspended magnetically on a permanent magnet. Regarding the process of detachment of the ball, in the seismic intensity indicator 1 placed on a short, hard-to-fall furniture, such as a sideboard in a common home, for example, an iron ball magnetically attached to each magnet is The magnet is formed into one magnet by the lines of magnetic force, strongly attracted, attracted, and maintained in a suspended state. Due to the vibration at the time of the earthquake, the lower surface of the magnet is swiftly tilted back and forth and left and right, and each ball also slides back and forth and right and left with the magnet attached to the magnet. And the inertial force and centrifugal force of the ball, or the combined force,
If the magnetic force is overcome, the ball falls out of the magnetic field of the magnet and falls.

The seismic intensities in various parts of Japan announced by the Japan Meteorological Agency are based on a standard called the Japan Meteorological Agency's seismic intensity class. The following seismic intensities 0, 1, 2, 3, 4, 5
It is divided into 10 classes: low, 5 strong, 6 low, 6 strong and 7 Until now, the seismic intensity display has been displayed based on human sensation and movement of objects, but since 1996, it has been changed to a method of displaying seismic intensity measured by a seismic intensity meter.
FIG. 1B is a perspective view showing a state where the seismic intensity is displayed on the seismic intensity indicator 1. The seismic intensity indicator 1 of the present invention includes five classes, excluding the five classes of the seismic intensity 0, the seismic intensity 1, the seismic intensity 6 weak, the seismic intensity 6 strong, and the seismic intensity 7 among the 10 class seismic intensities, that is, seismic intensity 2, seismic intensity 3, Seismic intensity 4, seismic intensity 5 weak, seismic intensity 5 strong M1, M
2, M3, M4, M5 magnets are in charge.

For example, as shown in FIG. 1B, three magnetized balls are attached to the magnets M1, M2, and M3 due to the vibration of the earthquake.
If it falls, it is known that the seismic intensity is 4. In addition, magnet M
If one ball falls, seismic intensity 2 and magnets M1 and M
If two balls of 2 fall, it is known that the seismic intensity is 3. Similarly, when four balls fall, the seismic intensity is lower than 5, and when five balls fall, the seismic intensity is higher than 5. In addition,
The seismic intensity display area is not limited to the five classes according to the present invention, and may be increased or decreased as appropriate. Further, the number of balls in charge of displaying each class may be plural.
Because it is small and light, it can be installed in the living room or reception area of ordinary households.

FIG. 2 is a three-sided view showing the seismic intensity indicator 1 in detail. FIG. 2 (a) is a plan view, FIG. 2 (b) is a front view with the ball suspended, and FIG. (c) is a bottom view. As shown in FIG. 2 (b), 5
Five magnets M1, M2, M having different magnetic forces in stages
3, M4, M5 are holes 5a, 5b, 5c, 5 respectively.
It is embedded in d and 5e and is fixed with an adhesive. The magnets M1 to M5 are cylindrical, have the same diameter, and have different lengths to change the magnetic force. Therefore, holes 5a to 5e having different depths are formed in accordance with the lengths of the respective magnets. By changing the depths of the holes 5a to 5e in accordance with the lengths of the magnets M1 to M5, mistakes in assembling can be prevented at the time of assembling the magnets M1 to M5, which is beneficial for quality control. I do not care.

The materials and magnetic forces of the magnets M1 to M5 indicating the respective seismic intensity classes will be described. The magnet used here is a permanent magnet, and it is desired that the remaining magnetization is stable and the magnetic force does not decrease during use. Magnet M
The materials 1 to M5 are made of permanent magnet Hi-HC (high holding power)
This is an Sr-based ferrite magnet having a high magnetic flux density and an inexpensive price. In addition, a rare earth magnet may be used. The unit indicating the magnetic force of the magnets M1 to M5 is preferably Tesla (T), and indicates the magnetic flux density per unit area. The optimum value of Tesla (T) of each magnet is determined by a test. The ball magnetically attached to each magnet is an iron ball and has a diameter of 25.4 mm.
And the mass is 66.8 g.

The value of Tesla (T) of each magnet when this ball is used will be introduced. The magnet M1 is for displaying the seismic intensity 2 and has a weak magnetic force so as to be surely separated by the vibration corresponding to the seismic intensity 2, and the magnetic force is preferably 0.05T. The magnet M2 is for displaying the seismic intensity 3 and has a weak magnetic force so as to be surely separated by the vibration corresponding to the seismic intensity 3, and the magnetic force is preferably 0.06T. The magnet M3 is
It is for displaying seismic intensity 4 and has a weak magnetic force so that it can be reliably separated by the vibration corresponding to seismic intensity 4, and the magnetic force is 0.0
7T is preferred. The magnet M4 is for displaying a seismic intensity of less than 5, and has a medium magnetic force so as to be surely separated by the vibration corresponding to the seismic intensity of less than 5, and the magnetic force is preferably 0.08T. The magnet M5 is for displaying a seismic intensity of 5 or more, and has a strong magnetic force so as to be surely separated by a vibration corresponding to the seismic intensity of 5 or more, and the magnetic force is preferably 0.09T.

The balls 2, 2,... Are made of iron and have the same material, the same size and the same mass, and the surfaces are also mirror-finished and subjected to the same surface treatment. For example, the size is not limited to one inch in diameter, but can be changed as appropriate. However, changing the ball diameter changes the mass,
The magnetic force must also be changed appropriately. The relationship between the magnetic force of the magnets M1 to M5 and the ball 2 may be determined in an experiment by reproducing each seismic intensity state of the seismic intensity class.

In FIG. 2C, a weight 8 is buried in the lower surface of the receiving table 7 and is fixed by an adhesive. The weight 8 is a weight and is an iron plate having a thickness of 3.2 mm. As a result, the center of gravity is lowered, and it is difficult for the vehicle to fall down, so that the vehicle is stabilized. The weight 8 may be made of another material, or the entire cradle 7 may be made of metal. Further, rubber plates 10, 10,... Formed in a columnar shape are fitted into holes 9, 9,. As a result, the coefficient of friction can be increased, so that the seismic intensity indicator 1 can be stably seated and hard to slip.

FIG. 3 is a sectional view taken along the line AA shown in FIG. As shown in FIG. 3, a fence 7 a is provided in a headband shape on the upper surface of the receiving stand 7. The cushioning material 3 is spread on the bottom surface to prevent the ball from bouncing. The ball 2 ′ that has separated due to the vibration of the earthquake once separates from the upper surface of the cradle 7, and is prevented from rebounding by the cushioning material 3 that absorbs the collision force. I have. In addition, the ball 7a secures the ball 2 'to the cradle 7 to prevent the ball 2' from tumbling to the floor. Once the ball 2 'falls to the floor, it takes time and effort to find it, and it may be lost. Fence 7
a secures the ball 2 'in the receiving stand 7, thereby eliminating the time and labor for searching for the ball 2' that has fallen to the floor. The fence 7a is a separate part of the ball receiving box.
It may be fixed to the upper surface of the cradle 7. The material of the support 5, the columns 6, 6 and the pedestal 7 is wooden, but may be non-metal such as plastic or resin, or light metal such as aluminum. Furthermore, the seismic intensity indicator 1 of the present invention is small and inexpensive and can be stocked with wooden furniture, which is always available in ordinary homes.

As shown in FIG. 3, the lower surface of the magnet M3 is covered with a non-magnetic protective case 4. The purpose of coating with the protective case 4 of the present invention is to prevent the surfaces of the magnets M1 to M5, which are ferrite magnets, from being rubbed by the balls, thereby separating the ferrite magnets and preventing the separated ferrite fine powder from adhering to the balls 2. It is in. If this object is achieved, the method is not limited to the non-magnetic protective case 4 but may be other methods, such as coating with a paint or plating.

FIG. 4A shows that the lower portions of the magnets M1 to M5 are N
It is a schematic diagram showing a case where the poles are aligned and arranged at equal intervals,
FIG. 4B is a schematic diagram showing a case where the lower portions of the magnets M1 to M5 are aligned with the S pole and are arranged at equal intervals. Magnets M1 to M5
By arranging the S pole or N pole magnetic poles at the same magnetic pole and arranging them at equal intervals, the flow of the lines of magnetic force can be arranged in the vertical direction, and magnetic adhesion between the balls can be prevented. It is possible to provide a compact and space-saving seismic intensity indicator 1 that can be made and the interval is minimized.

The operation procedure of the seismic intensity indicator 1 is as follows. The ball 2 is attached to the lower surface of the five magnets M1, M2, M3, M4, M5.
2... Are magnetically attached one by one and suspended to complete. Therefore, the operation becomes extremely simple.

(Second Embodiment) FIG. 5A is a perspective view showing the whole view of the seismic intensity indicator 11 according to the present invention. As shown in FIG. 5A, a seismic intensity indicator 11 according to the present invention
Are different from each other in the support 5 on which the permanent magnets M6 having the same magnetic force are disposed, the columns 6, 6 at both ends, the pedestal 7, and the mass (diameter) magnetized and suspended from the permanent magnet. It is composed of iron balls 12a, 12b, 12c, 12d, and 12e. Magnets M6, M6 of seismic intensity indicator 11 of the present invention
By making all the same, the diameter of each ball can be changed. Further, since the assembly of the magnet is simple and no error occurs, the seismic intensity indicator 11 with good quality can be obtained. FIG. 5B is a perspective view showing a state where the seismic intensity is displayed on the seismic intensity indicator 11. The seismic intensity indicator 11 of the present invention displays seismic intensities of five grades of seismic intensity 2, seismic intensity 3, seismic intensity 4, weak intensity 5 and strong intensity 5 with balls 12a, 12b, 12c, 12d, 12
e is in charge of each and displays.

The magnetic force of the common magnet M6 shown in FIG. 5A is preferably 0.05T. The ball 12a has a seismic intensity 2
It is designed to be released by the vibration corresponding to the seismic intensity 2, and the ball weighs 66.8 g.
It is. The ball 12b is used for displaying the seismic intensity 3 and is surely separated by the vibration corresponding to the seismic intensity 3, and the mass of the ball is 56.8 g. Ball 12
“c” is for displaying the seismic intensity 4 and is surely separated by the vibration corresponding to the seismic intensity 4, and the ball has a mass of 46.8 g. The ball 12d is for displaying a seismic intensity of less than 5, and is surely separated by a vibration corresponding to a seismic intensity of less than 5, and the ball has a mass of 36.8 g. The ball 12e is for displaying a seismic intensity of 5 or more.
The ball is surely separated by strong vibrations, and the ball weighs 26.8 g. The detailed description is the same as that of the first embodiment, and will not be repeated here.

As a preferred embodiment of the present invention, a seismic intensity indicator having a structure in which a support for supporting the support is provided and a pedestal for supporting the support is provided has been described. The present invention is not limited to the above-described embodiment, although it is convenient to carry or display. For example, the magnet may be provided on the upper surface or the side surface in addition to the lower surface of the support, as long as the support 5 is horizontally supported. May be arranged on the vertical side surface. Further, the permanent magnet may be of an electromagnet type.

[0036]

According to the first aspect of the present invention, a plurality of magnets having different magnetic forces are disposed on the lower surface of the support in a stepwise manner, and balls of the same shape are magnetically attached and suspended, so that the earthquake is prevented. By releasing the ball by the vibration at the time of occurrence and displaying the released ball and the ball that did not leave,
You can easily display the seismic intensity of the earthquake. By knowing the seismic intensity of the earthquake early, it is possible to respond quickly to subsequent actions. Furthermore, since there is no thing to be destroyed or damaged by the vibration of the earthquake and high durability, it can be used repeatedly, no maintenance is required, and it is economical because there is no power supply and consumable parts for driving, Energy saving and environmental issues are considered. In addition, since it is small and lightweight, it can be installed in a living room or a reception room of a general household.

According to the second aspect of the present invention, a plurality of magnets having the same magnetic force are provided on the lower surface of the support, and balls having different diameters are magnetically attached in a stepwise manner and suspended.
The seismic intensity of the earthquake can be easily displayed by separating the ball by the vibration at the time of the earthquake and displaying the separated ball and the ball that did not. By knowing the seismic intensity of the earthquake early, it is possible to respond quickly to subsequent actions. Furthermore, since there is no thing to be destroyed or damaged by the vibration of the earthquake and high durability, it can be used repeatedly, no maintenance is required, and it is economical because there is no power supply and consumable parts for driving, Energy saving and environmental issues are considered. In addition, since it is small and lightweight, it can be installed in a living room or a reception room of a general household.

According to the third aspect of the present invention, since the magnetic poles of the magnets are aligned with one of the S pole and the N pole and are arranged at equal intervals, interference between the magnetic force lines of each magnet can be avoided. A stable magnetic attachment of the ball is possible, and a high-precision, compact and lightweight seismic intensity indicator can be obtained.

According to the fourth aspect of the invention, since the magnet is projected from the surface of the support, it is possible to prevent the magnet from hitting the edge of the hole of the support and inadvertent detachment.
It is possible to display a highly reliable seismic intensity display.

According to the fifth aspect of the present invention, since the surface of the projecting portion of the magnet is covered with the protective cap made of a non-magnetic material, the magnet surface is not peeled off, so that the magnetizing effect by the magnetic force is maintained. Therefore, a highly reliable seismic intensity indicator can be maintained. Further, the mirror surface of the ball surface can be kept forever, and maintenance becomes easy.

According to the sixth aspect of the present invention, by providing a fall prevention fence on the cradle, the ball can be secured on the cradle and the ball can be prevented from rolling down on the floor. So that the subsequent search for the ball is unnecessary.

According to the seventh aspect of the present invention, since the center of gravity is lowered by storing the weights (weights) in the cradle, even if the seismic intensity indicator receives a vibration with a seismic intensity of 5 or more, it may fall. Disappears. In addition, the rubber plates provided at the four corners on the lower surface of the cradle prevent slippage, secure stable seating, and improve quality.

[Brief description of the drawings]

FIG. 1 is a diagram showing a seismic intensity indicator according to a first embodiment of the present invention, and (a) is a perspective view. (B) is a perspective view showing a display result on a seismic intensity indicator.

FIG. 2A is a plan view showing a seismic intensity indicator,
(B) is a front view in a state where the ball is suspended,
(C) is a bottom view thereof.

FIG. 3 is a sectional view taken along the line AA in FIG. 2 (b).

FIG. 4A is a schematic diagram when a magnetically attached portion to a ball is aligned with an N pole. (B) is a schematic diagram in the case where the magnetically attached portion with the ball is aligned with the S pole.

FIG. 5 is a diagram showing a seismic intensity indicator according to a second embodiment of the present invention, and (a) is a perspective view. (B) is a perspective view showing a display result on a seismic intensity indicator.

FIG. 6 is a perspective view showing a conventional seismic intensity reference device capable of displaying seismic intensity.

FIG. 7 is a perspective view showing a columnar body and fixing means of a conventional seismic intensity standard.

FIG. 8 is a sectional view showing a conventional vibration detector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Seismic intensity indicator 2 Ball 3 Buffer material 4 Non-magnetic material cap 5 Supports 5a, 5b, 5c, 5d, 5e Hole 6 Support 7 Receiving stand 7a Fence 8 Weight (weight) 9 Hole 10 Rubber plate 12a, 12b, 12c, 12d, 12e Ball M1, M2, M3, M4, M5 Magnet

Claims (7)

[Claims] 1. A method according to claim 1, wherein a plurality of magnets having stepwise different magnetic forces are disposed on the support, and a ball having the same diameter is magnetically attached to the magnet, and the ball is separated by vibration. Characteristic seismic intensity indicator. 2. A plurality of magnets having the same magnetic force are arranged on a support, and balls having different outer diameters are magnetically attached to the magnets in a stepwise manner. A seismic intensity indicator characterized by the following. 3. The seismic intensity indicator according to claim 1, wherein the magnetic poles of the plurality of magnets are aligned with one of the S pole and the N pole and are arranged at equal intervals. . 4. The seismic intensity display according to claim 1, wherein the magnetized surface of the magnet is flush with the surface of the support or protrudes from the surface of the support. vessel. 5. The seismic intensity indicator according to claim 4, wherein the magnetically attached surface of the magnet has a protective cap made of a non-magnetic material. 6. The seismic intensity indicator according to claim 1, wherein a pedestal is provided directly below the support, and a fence is provided on the pedestal to prevent the detached ball from falling. 7. The seismic intensity indicator according to claim 6, wherein the cradle has a weight and a rubber plate is provided on a lower surface.