JPH08228864A - Protective device against earthquake - Google Patents

Abstract

PURPOSE: To make the structure which is shaken by an earthquake much simpler by using more than one pair of ferromagnets, one of which is a permanent magnet and which adsorb each other, and one of which is fixed at the prescribed position while the other is adsorbed and supported movably and which will separately act when the shock of earthquake is stronger than the prescribed level. CONSTITUTION: The upper ferromagnet 27 made of permanent magnet with a magnetic pole is at the top fixed on the under surface of each fixing part 12 above, and the lower ferromagnet 29 made of mild steel is fixed on the protective part 21 at the bottom which can be attracted at the position opposite to the ferromagnet 27. And if the protective part 21 is shaken by an earthquake more strongly than the prescribed level, the adsorption area between the upper ferromagnet 27 and the lower ferromagnet 29 is reduced, and the ferromagnets are separated by the force of inertia, and the protective part 21 immediately drops down. In this way, the structure of the parts which is shaken by the stronger shock of the earthquake than the prescribed level can be significantly simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to prevent damage caused by movement or damage of articles such as articles dropped on shelves or falling drawers during an earthquake. It relates to the device.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Publication No. 6-94766, there is provided a shutter which partially or wholly shields the front of a shelf in case of an earthquake to prevent articles from falling. The operation device having been raised and maintained by the engagement of the engagement device and having a certain weight due to the shaking of the earthquake operates to release the engagement and the shutter is lowered to shield the front surface of the shelf. Such a device has a drawback that the engaging device and the operating device have a complicated structure. Furthermore, the operating device may be difficult to operate depending on the direction of shaking.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above problems and provides an earthquake protection device in which the structure of the portion that operates due to an earthquake is significantly simplified. The present invention also provides an earthquake protection device that can be adapted even if it shakes in various horizontal directions due to an earthquake.

[0004]

SUMMARY OF THE INVENTION The present invention includes one or more sets of ferromagnetic bodies, at least one of which is a permanent magnet and can be attracted to each other, one of which is fixed at a predetermined position and the other of which is fixed. The object on the side is to provide an earthquake protection device characterized in that it is swingably supported in an adsorbed state, and performs a protective operation by separating when it swings more than a prescribed amount. The present invention is also such a device, wherein each of the ferromagnetic bodies is an upper ferromagnetic body arranged on the upper side and fixed in a predetermined position,
(EN) An earthquake protection device comprising a lower ferromagnetic material which is arranged on the lower side and which can be separated downward from an adsorbed state and which can swing in any horizontal direction. The present invention is also an earthquake protection device that prevents articles placed on shelves from falling in the event of an earthquake, and descends by its own weight to shield the front of the shelves partially or entirely to prevent the articles from falling. An upper ferromagnetic body including a shield, at least one of which is made of a permanent magnet, is fixed to a shelf to keep the shield in a raised state at all times, and a lower portion of the shield that can be attracted to this ferromagnetic body. A lower ferromagnet attached to the shelf, the lower ferromagnet being movable in a predetermined range in any horizontal direction with respect to the shelf and descending when separated from the upper ferromagnet. The present invention provides an earthquake protection device.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In one embodiment of the present invention shown in FIGS. 1 to 4, reference numeral 50 denotes a shelf, which is provided with a plurality of stages of support portions 51, and various articles 52 are supported on the respective support portions 51. Reference numeral 10 indicates an earthquake protection device as a whole, and a shelf 5
It is placed at the front of 0. Reference numeral 12 is a mounting member fixed to each of the upper ends of the front surface of the shelf 50 with screws 13, 15
Reference numeral 19 denotes a mounting member fixed to both sides of the lower part of the front surface of the shelf 50 by screws 16, and 19 denotes a pair of rod-shaped guide members extending vertically on both sides of the front surface of the shelf 50 and fixing both ends to the mounting members 12 and 15, respectively. Is. Reference numeral 20 is a shield, which is configured as described below. That is, reference numeral 21 denotes a thin plate-like protective member having the same number as the supporting portion 51 having a large hole 22 formed by allowing the guide member 19 to pass through in any direction with a margin near both ends. For example, aluminum, iron, wood, synthetic It is a thin plate made of a strong and light material such as resin. Reference numeral 25 denotes a flexible connecting member which is made of, for example, a ribbon and is attached to both ends of the protective member 21 with screws 26 so that the protective member 21 can be connected to the mounting member 12 and can be maintained at a predetermined interval. Can also be used. Reference numeral 27 denotes an upper ferromagnetic body made of permanent magnets having magnetic poles at upper and lower ends fixed to the lower surface of each upper mounting member 12. Reference numeral 29 denotes a lower ferromagnetic body made of, for example, mild steel, which is fixed on the lowermost protective member 21 at a position facing the upper ferromagnetic body 27. A hole 30 is formed to allow the ferromagnetic bodies 27 and 29 to pass through in any direction with a margin.

In the above-mentioned structure, when the protection member 21 at the lowermost end is lifted by hand, all the protection members 21 are lifted as shown in FIGS. Will be adsorbed and will maintain that state. In the case of an earthquake, the protective member 21 shakes, so that the adsorption area between the upper and lower ferromagnetic bodies 27, 29 decreases or separates due to inertia, and the protective member 21 suddenly descends as shown in FIGS. Will be done. In this case, they may be separated by a vertical vibration component. In this state, the protection member 21 is arranged in front of each support portion 51 of the shelf 50 to prevent the article 52 from dropping. In this embodiment, the protection member 21 is a shield that partially covers the front surface of the shelf 50, but the shield member may be configured to cover the entire front surface. Further, either one of the upper and lower ferromagnetic bodies 27 and 29 may be a permanent magnet, but both may be permanent magnets that attract each other. Also, the ferromagnetic materials 27 and 29 are 1
Any number of groups may be provided. Alternatively, the protection member 29 may be lifted by using a string or the like. In addition, a hole 22 formed in the protective member 21 for penetrating the guide member 19 is opened so that the protective member 21 can hardly move in the horizontal direction, and the ferromagnetic bodies 27 and 29 are separated only by the vertical shaking during an earthquake. It may be configured as follows.

In another embodiment of the present invention shown in FIGS. 5 to 7, when the main body 55 is provided with, for example, two drawers 56, the earthquake protector 10 is adapted to prevent the drawers 56 from coming off due to an earthquake. Is shown. 40 is a mounting member fixed to the main body 55 above each drawer 56, 42 is a ferromagnetic member which is rotatably mounted on a shaft 43 provided in this mounting member, and one portion 42a is heavy, and 45 is It is a ferromagnetic body made of a permanent magnet that is fixed to the mounting member 40 and adsorbs the portion 42a to hold it in the raised position. If the state is shaken by the earthquake, the vertical movement included in the vibration of the earthquake separates the ferromagnetic body 45 from the ferromagnetic body 45, and the portion 42a rotates as shown by the chain line in FIG. 5 so that the drawer 56 cannot be pulled out. Become. Reference numeral 46 denotes a permanent magnet that attracts the portion 42a and the portion 42b on the opposite side so that the ferromagnetic material 42 does not return to the initial state again due to the shaking of the earthquake, but may not be provided. To restore the ferromagnetic body 42 to the initial state after the earthquake, the portion 42a may be pushed up from below.

[0008]

As described above, the present invention is provided with the ferromagnetic bodies 27, 29 or 42, 45, at least one of which is a permanent magnet and which can be attracted to each other. Therefore, the structure can be remarkably simplified. . Further, in the present invention, an upper ferromagnetic body 27 arranged at a predetermined position and a lower ferromagnetic body 29 attracting each other to the ferromagnetic body are provided so as to be movable in all the downward and horizontal directions. Has the advantage that it can perform well even if it shakes in any direction due to an earthquake.

[Brief description of drawings]

1A and 1B show the entire structure before performing a protective operation according to an embodiment of the present invention, wherein FIG. 1A is a vertical sectional view and FIG. 1B is a front view.

FIG. 2 shows the entire state of the protective operation,
(A) is a longitudinal sectional view and (b) is a front view.

FIG. 3 is a partially cutaway view showing a main part before performing the protection operation, (a) is a longitudinal sectional view, and (b) is a front view.

FIG. 4 is a partially cutaway view showing a main part in a state where the protection operation is performed, (a) is a longitudinal sectional view, and (b) is a front view.

5A and 5B show a drawer earthquake protection device, FIG. 5A is a vertical sectional front view, FIG. 5B is a transverse plan view, and FIG. 5C is a front view showing a mounted state.

[Explanation of symbols]

 10 Earthquake Protective Device 12 Mounting Member 15 Mounting Member 19 Guide Member 20 Shield 21 Protective Member 22 Hole 25 Connecting Member 27 Upper Ferromagnetic Material 29 Lower Ferromagnetic Material 30 Hole 40 Mounting Member 42 Ferromagnetic Material 45 Ferromagnetic Material

Claims (3)

[Claims] 1. One or more sets of ferromagnetic bodies, at least one of which is a permanent magnet and can be attracted to each other, are included. One side of the ferromagnetic bodies is fixed at a predetermined position and the other side is in an attracted state. An earthquake protection device, which is rockably supported and performs a protective operation by separating when it shakes a predetermined amount or more. 2. The earthquake protection device according to claim 1, wherein
Each of the ferromagnetic bodies is arranged on the upper side and fixed to a predetermined position on the upper side, and on the lower side, the lower side is separable from the attracted state and swingable in any horizontal direction. An earthquake protection device comprising a ferromagnetic material. 3. An earthquake protection device for preventing articles placed on shelves from falling in the event of an earthquake, which is lowered by its own weight and partially or wholly covers the front of the shelves to prevent articles from falling. Of the upper ferromagnet which is fixed to the shelf in order to maintain the shelter in a housed state in which at least one of them is a permanent magnet, and a shield which can be attracted to this ferromagnet. It includes a lower ferromagnet attached to the lower part, and this lower ferromagnet is movable in a predetermined range in any horizontal direction with respect to the shelf and descends when separated from the upper ferromagnet. Earthquake protection device characterized by being present.