JPH11206000A - Power interrupting device for emergency - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power interrupting device for emergency with high precision and reliability, whose ball body falls from its seat at a prescribed seismic intensity regardless of its fitting directions or the generating position (generating direction) of an earthquake or the like, which can automatically interrupt power supply due to a strong earthquake of a prescribed seismic intensity or higher, prevent secondary disaster or the like exactly, reduce damage due to the earthquake, release (reset) the interrupting condition of the power supply exactly and promptly with a simple operation, ensure dust-proof and drip-proof effects, and can attain simplicity of a structure, easy handling, high durability, and relatively-low cost. SOLUTION: This power interrupting device for emergency is constituted by mounting a ball body 4 on the seat 3 of a tubular body 2, permitting a reset cup 5 sliding freely in a tubular central direction with the tubular body 2 enclosed to be pushed above the tubular body 2 by a reset lever 10, so that a switch 16 may turn ON through a sliding body 15 when the ball body 4 is on the seat 3, the switch may turn OFF if it is not, and when a reset cup 5 bottom inclining so that its central side may be lower than its outer periphery is beyond the upper edge of the tubular body 2, the ball body 4 may be accommodated automatically in the seat 3 of the tubular body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly enables the power supply to be cut off promptly when a strong earthquake (or gas explosion or other disaster) of a predetermined seismic intensity or higher occurs.
The present invention relates to a disaster prevention power cutoff device that can release (reset) the cutoff state with a single touch after the safety is confirmed after the cutoff.

[0002]

2. Description of the Related Art Conventionally, as this type of power cut-off device for disaster prevention, for example, there are a seismic device and an automatic notification device as described in Japanese Patent Application Laid-Open No. 9-284986. This is a steel ball type vibration sensor that senses vibration of a predetermined level or more, a keep relay that operates based on the detection output of this vibration sensor, and a primary outlet terminal to a secondary outlet terminal by this keep relay. And a power relay that cuts off an electric circuit to the power supply. When an earthquake of a predetermined level or more occurs, the electric circuit is cut off to stop energizing the load, and the cut-off state is maintained by a keep relay.

[0003]

In the steel ball type vibration sensor of the invention as described above, the steel ball is mounted on a steel ball receiver projecting into the case of the seismic device. When
Three sides of the steel ball are surrounded by a case. That is, the steel ball is formed so as to surely fall on the operating lever, and when resetting the steel ball,
This is because the case serves as a guide wall so that the case is securely mounted on the steel ball receiver. However, since the operating lever of the steel ball can only fall down, the relationship between the mounting direction of the seismic device and the location (occurrence direction) of the earthquake,
Even if an earthquake having the same seismic intensity occurs, there is a possibility that the steel ball may fall or may not fall.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned drawbacks and the like, and has high accuracy, high reliability, easy resetting, easy handling, and a simple structure and a durable structure. It was created in order to provide a disaster prevention power cutoff device with excellent inexpensiveness and relatively inexpensively, and in the disaster prevention power cutoff device A according to claim 1, a strong earthquake having a predetermined seismic intensity or more occurs. A power supply for disaster prevention, which automatically shuts off the supply of power when it occurs, and is fixed to a case 1 and substantially in the center of the case 1 and has a cylindrical core parallel to a vertical line. A cylindrical body 2 arranged to be
A spherical body 4 mounted on a seat portion 3 provided by utilizing a peripheral edge portion of the upper end of the cylindrical body 2 and a spherical body 4 which surrounds the cylindrical body 2 and is mounted on the cylindrical body 2 so as to be slidable in the cylindrical direction. A reset cup 5, a reset spring 8 for urging an elastic force so that the reset cup 5 is always located below the cylindrical body 2,
A reset lever 10 capable of pushing up the reset cup 5 above the cylinder 2 against the resilience of the reset spring 8
A sliding member 15 disposed in the cylinder 2 so as to be slidable in the vertical direction, and a switch 16 for opening and closing the power supply circuit by the sliding member 15. When the sphere 4 is placed on the seat 3, the sphere 4 turns on the switch 16 via the sliding body 15, and the sphere 4 is
The switch 16 is configured to be turned off when it is not placed on the bottom, and the bottom of the reset cup 5 is formed in an inclined shape such that the center is lower than the outer periphery. When the bottom of the reset cup 5 rises beyond the upper edge of the cylinder 2, the means for automatically fitting the sphere 4 into the seat 3 of the cylinder 2 is adopted.

[0005] Further, in the power cut-off device A for disaster prevention according to the second aspect, means for arranging a plurality of inclined ribs 6 at the bottom of the reset cup 5 at appropriate intervals in the radial direction is adopted.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated examples. A in the figure mainly shows a power cutoff device for disaster prevention according to the present invention which is installed near a breaker 20 (for example, a non-trip breaker) provided on a switchboard (for example, installed on a switchboard or other parts). As shown in FIG. 1, when a strong earthquake (or gas explosion, other disaster) or the like having a predetermined seismic intensity (for example, seismic intensity 4, seismic intensity 5 or the like) or the like occurs, the breaker 2
Zero power (or from the breaker 20) is automatically cut off to prevent secondary disasters caused by disasters such as earthquakes, and to reduce the damage.
When the safety is confirmed after the power supply is cut off, the cutoff state can be released (reset) with one touch.

[0007] The disaster prevention power cut-off device A is
A sealed type case 1 made of metal or synthetic resin, or a composite material thereof, which is configured to exhibit a drip-proof effect. A substantially cylindrical tubular body 2 arranged so that its tubular core direction is parallel to a vertical line, and a seat 3 formed by cutting a peripheral edge of an upper end of the tubular body 2 or the like.
Spherical sphere 4 stably and well-balanced
A reset cup 5 attached to the cylinder 2 so as to surround the cylinder 2 and to be slidable in the direction of the cylinder center; and a resilient force so that the reset cup 5 is always located below the cylinder 2. A reset spring 8 in the form of a coil spring to be urged, and disposed below the reset cup 5 and mounted so as to be vertically swingable via a shaft pin 12,
1 and a reset lever 10 capable of pushing up the reset cup 5 upwardly of the cylinder 2 against the resilience of the reset spring 8 by the pressing operation of the reset spring 8, and disposed in the cylinder 2 so as to be slidable in the vertical direction. And a switch 16 that opens and closes a power supply circuit with the sliding body 15.

Further, when the sphere 4 is placed on the seat 3 of the cylindrical body 2, the sphere 4 presses the sliding body 15 downward, and the sliding body 15 Piece 1
The switch 16 is turned ON by pressing the switch 7 downward. On the other hand, when the sphere 4 is not placed on the seat 3 of the cylindrical body 2 (when the sphere 4 falls from the seat 3),
The switch piece 17 of the switch 16 pushes up the sliding body 15 so that the switch 16 is turned off.

Further, the power cut-off device A for disaster prevention according to the present invention comprises:
The bottom of the reset cup 5 is formed so as to be inclined so that the center is lower than the outer circumference. When the reset lever 10 is pressed, the bottom of the reset cup 5 rises beyond the upper edge of the cylindrical body 2. The spherical body 4 is configured to automatically fit in the seat 3 of the cylindrical body 2. By the way, a plurality of substantially triangular plate-shaped inclined ribs 6 are provided on the bottom of the reset cup 5.
Are arranged at appropriate intervals in the radial direction.
The sphere 4 that has fallen into the cylinder 2 is surely moved toward the cylinder 2 by the inclined rib 6, and the cylinder 2
It is configured so that it can be prevented from moving around.

The case 1 is configured so that it can be easily and stably mounted on a switchboard, a wall surface or the like, and other portions. In particular, an upper horizontal surface portion such as a ceiling surface, a vertical surface portion such as a wall surface, or the like is provided. It is preferable to be able to be accurately and reliably attached to a lower horizontal surface portion such as a floor surface. In addition, the case 1 may be provided integrally with the switchboard, the breaker 20, or the like, so that the case 1 can be made compact.

The cylinder 2 is made of metal or synthetic resin.
Alternatively, the seat portion 3 on which the spherical body 4 can be stably mounted is formed by forming a relatively thick cylindrical shape from these composite materials and the like and cutting the upper end surface portion into a substantially spherical shape. I have.

The spherical body 4 is made of a metal (for example, stainless steel), a synthetic resin, or a solid sphere having a relatively heavy weight made of a composite material thereof.
The setting of the predetermined seismic intensity when the sphere 4 falls from the seat 3 includes the diameter and weight of the sphere 4, the shape and size of the seat 3, and the cylinder 2.
Are set by changing the dimensions and the like.

The reset cup 5 is made of a metal, a synthetic resin, or a composite material thereof, and has a short cylindrical portion which is externally mounted on the cylindrical body 2 and an upper end portion of the cylindrical portion. A bottom plate having a substantially annular plate shape, a short cylindrical side circumferential portion connected to an outer peripheral edge of the bottom plate portion, and a lid 7 for closing an open portion at an upper end of the side circumferential portion. The bottom plate has a plurality of inclined ribs 6 arranged at appropriate intervals in the radial direction.

The reset spring 8 is contracted between the case 1 and the lid 7 of the reset cup 5, and is formed so that the reset cup 5 can be constantly pushed down. Note that the reset spring 8 may be one that pulls down the reset cup 5.

The reset lever 10 is made of metal or
The operation piece 11 is made of, for example, a synthetic resin or a composite material of the above. The operation piece 11 is exposed at, for example, the center of the front of the case 1. Reset lever 1 as
The reset cup 5 is formed so as to swing up and push the reset cup 5 upward. The reset lever 10
Is configured to surround the cylindrical body 2 and to push up the reset cup 5 in a well-balanced manner.

The sliding member 15 is made of a metal, a synthetic resin, or a composite material thereof, and has an upper end formed in a substantially conical shape and a lower end formed in a flat shape. ing. The upper end of the sliding body 15 is
May be a spherical shape such that they closely contact each other, or may be another shape.

As the switch 16, for example, a micro switch, a limit switch, or the like is used.
7, the sliding member 15 is formed so as to be pushed up. If a circuit for an emergency light is connected to the switch 16 and the emergency light is turned on at the same time as the power supply is cut off, secondary disasters and the like can be more reliably prevented. , The damage can be further reduced. At this time, a switch having a plurality of switch portions may be used as the switch 16, or two switches 16 may be provided side by side below the sliding body 15.

By the way, the specific configuration, shape, dimensions, arrangement position, specific configuration of the case 1,
Shape, dimensions, material, specific configuration, shape, dimensions,
Material, disposition position, specific configuration, shape, dimensions of seat 3, specific configuration, shape, dimensions, material of sphere 4, specific configuration, shape, dimensions, material of reset cup 5, specific of inclined rib 6 Target shape, dimensions, arrangement position, number, specific configuration of lid 7, shape, dimensions, material, specific configuration of reset spring 8,
Shape, size, arrangement position, material, specific configuration, shape, size, material of reset lever 10, specific shape and size of operation piece 11, specific shape, size, material of shaft pin 12, slide member 15 Specific configuration, shape, dimensions, material, switch 16
Specific configuration, shape, dimensions, arrangement position, switch piece 17
The specific configuration, shape, dimensions, and the like of are not limited to those shown in the drawings, and can be freely set as appropriate.

The power cut-off device A for disaster prevention according to the present invention is configured as described above.
For example, it can be installed in large machinery, etc., and when they generate abnormal vibration, they can be used to detect this and stop operation immediately to prevent accidents etc. is there.

[0020]

According to the first aspect of the present invention, there is provided a power cutoff device for disaster prevention which automatically shuts off power supply when a strong earthquake having a predetermined seismic intensity or more occurs. A case 1, a cylinder 2 fixed at substantially the center inside the case 1, and arranged so that the cylinder center direction thereof is parallel to the vertical line, and an upper peripheral portion of the cylinder 2 are used. And a reset cup 5 surrounding the cylinder 2 and mounted on the cylinder 2 so as to be slidable in the cylinder center direction. A reset spring 8 for urging the resilient force so as to be always positioned below the cylinder 2, a reset lever 10 capable of pushing up the reset cup 5 upwardly of the cylinder 2 against the resilience of the reset spring 8; , Arranged in the cylinder 2 so that it can slide vertically A sliding body 15 which, this sliding member 15
And a switch 16 for opening and closing the power supply circuit by means of
The sphere 4 turns on the switch 16 via the slide 15,
When the sphere 4 is not placed on the seat 3 of the cylindrical body 2, the switch 16 is configured to be turned off, and the bottom of the reset cup 5 is formed so as to be inclined such that the center is lower than the outer periphery. Then, when the reset lever 10 is pressed to raise the bottom of the reset cup 5 beyond the upper edge of the cylinder 2, the sphere 4 is automatically fitted into the seat 3 of the cylinder 2. Therefore, when a strong earthquake (or gas explosion or other disaster) of a predetermined seismic intensity or higher occurs, the sphere 4 placed on the seat 3 of the cylindrical body 2 falls, and the switch 16 which has been in the ON state is turned off. Is turned off, the power supply is immediately cut off, secondary disasters and the like can be reliably prevented, and the disaster-prevention power cut-off device A can reduce damage caused by an earthquake or the like. In addition, the case 1 can be expected to have a dust-proof and drip-proof effect of the power cut-off device A for disaster prevention, and the structure is simple, easy to handle, and excellent in durability.
It can be provided relatively inexpensively.

In particular, a cylindrical body 2 fixed at substantially the center inside the case 1 and arranged so that the cylindrical direction thereof is parallel to the vertical line, and a peripheral portion of the upper end of the cylindrical body 2 are used. A sphere 4 placed on the seat 3 provided in the above manner, a reset cup 5 surrounding the cylinder 2 and attached to the cylinder 2 so as to be slidable in the cylinder center direction, and a reset spring 8 The sphere 4 placed on the seat 3 can be dropped in any direction by 360 degrees since the sphere 4 is provided with the reset lever 10 which can push up the reset cup 5 above the cylindrical body 2 against the force of the force. As a result, regardless of the mounting direction of the power cut-off device A for disaster prevention or the location (occurrence direction) of the earthquake, if an earthquake of a predetermined seismic intensity or higher occurs, the vehicle falls from the seat 3 and the accuracy is high. It is possible to provide the disaster prevention power cutoff device A with high reliability.

In addition, the bottom of the reset cup 5 is formed so as to be inclined so that the center is lower than the outer periphery, and when the reset lever 10 is pressed, the bottom of the reset cup 5 exceeds the upper edge of the cylindrical body 2. The sphere 4 is configured to automatically fit into the seat 3 of the cylinder 2 when it rises as described above, so that the power supply cutoff state can be ensured by a simple one-touch operation simply by pressing the reset lever 10. And can be quickly and quickly released (reset). That is, the sphere 4 that has fallen from the seat portion 3 of the cylinder 2 is reliably received by the reset cup 5, and moves toward the cylinder 2 regardless of the position of the reset cup 5, and the reset cup 5 rises. Thereby, it can be securely accommodated in the seat 3 of the cylindrical body 2.

Further, in the power cut-off device A for disaster prevention according to the present invention, the plurality of inclined ribs 6 are arranged at the bottom of the reset cup 5 at appropriate intervals in the radial direction. The inclined ribs 6 ensure that the spherical body 4 moves toward the cylindrical body 2 and that it can be reliably prevented from moving around the cylindrical body 2 due to inertia when dropped. It can be quickly stored in the section 3.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of mounting a power cutoff device for disaster prevention according to the present invention.

FIG. 2 is a vertical side view illustrating a power cutoff device for disaster prevention according to the present invention.

FIG. 3 is a vertical side view illustrating a power cutoff device for disaster prevention according to the present invention.

FIG. 4 is a partially omitted perspective view illustrating a power cutoff device for disaster prevention according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS A Disaster prevention power cut-off device 1 Case 2 Cylindrical body 3 Seat 4 Sphere 5 Reset cup 6 Inclined rib 7 Lid 8 Reset spring 10 Reset lever 11 Operation piece 12 Axis pin 15 Slider 16 Switch 17 Switch piece 20 Breaker

Claims (2)

[Claims] 1. A disaster prevention power cutoff device for automatically shutting off power supply when a strong earthquake or the like having a predetermined seismic intensity or higher occurs, comprising: a case; A cylinder disposed so that the cylinder center direction is parallel to the vertical line, a sphere mounted on a seat provided using an upper peripheral edge portion of the cylinder, and a cylinder surrounding the cylinder. A reset cup mounted on the cylinder so as to be slidable in the direction of the cylinder center, a reset spring for urging the resilient force so that the reset cup is always located below the cylinder, and an elasticity of the reset spring. A reset lever capable of pushing the reset cup upwardly against the force against the force, a sliding member disposed in the cylinder so as to be slidable in the vertical direction, and a switch for opening and closing the power supply circuit with the sliding member. And the sphere is a cylinder When the sphere is placed on the cylindrical seat, the switch is turned on via the sliding body. When the sphere is not placed on the cylindrical seat, the switch is turned off.
The bottom of the reset cup is formed so that the center is lower than the outer circumference, and the bottom of the reset cup rises by pushing the reset lever so that the bottom of the reset cup exceeds the upper edge of the cylinder A power cutoff device for disaster prevention, characterized in that the sphere automatically fits in the seat of the cylinder when the power is turned off. 2. The power cut-off device for disaster prevention according to claim 1, wherein a plurality of inclined ribs are arranged at appropriate intervals in the radial direction at the bottom of the reset cup.