JPS5845724Y2 - Gas valve automatic closing device for earthquake disaster prevention - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic gas valve closing device for earthquake disaster prevention that is used for city gas and can quickly and reliably close the gas main valve in the event of an earthquake.

Hereinafter, an example of the present invention will be explained with reference to the embodiments of the drawings.
The present invention includes a housing 1 that is attached to a gas pipe 12 that is fixed to a gas valve 10, a ball drop table 3 that is fixed to the inner wall 1a of the housing 1, holds a ball 2, and is inclined to cause the ball to fall due to earthquake vibrations. , a lever plate retaining stand 4 which is swingably supported via a spring 4b so as to be tilted by the impact of the ball 2 on the rear part of the inner bottom 1b of the casing 1; The rear end 7a is always placed on the lever plate holding stand 4, and is elastically supported integrally with the lever plate 7 by the front end 7b, so that the housing is A lever plate 7 having a locking rod 6 that can be raised and lowered through a hole 1C provided in the bottom surface 1b of the body 1, and a lever plate 7 that is rotatably attached to the lower front end of the housing 1 and is driven by the operation of an internal spiral spring 8a. This automatic closing device for a gas valve for earthquake disaster prevention is characterized by comprising a rotating box 8 and a locking pawl 9 which is attached integrally therewith and is intended to hold a lever 11 of a gas valve 10.

In FIG. 1, gas pipes 12 are connected upward and downward to a gas valve 10 for city gas, and when the lever 11 is in the state shown in FIG. 1, the gas valve 10 is emptied and gas is supplied.

The gas pipes 12 are for supplying and receiving gas, respectively.

One of the gas pipes 12 houses the housing 1 (main mechanical parts of the proposed device are housed therein).

) is attached via the fastener 13.

The upper front part of the inner wall 1a of the housing 1 (the right side in FIG. 1 is the front).

) is attached with a ball drop table 3 tilting backwards.

A ball platform 3a integrated with the drop platform 3 is provided flatly,
A hole is made in this and the ball 2 is placed flat on it.

The ball 2 is of moderate weight, such as a steel ball.

The ball 2 falls down the arc-shaped inner surface of the ball drop table 3 due to the vibration of the earthquake, and a lever plate holding table 4 is provided at a position where the ball 2 comes out from the rear end exit of the drop table 3 and receives the ball 2. A base 4a of the engagement base 4 is swingably supported on the inner bottom 1b via a spring 4b.

4C is a ball receiver. Reference numeral 7 denotes a lever plate, which is pivotally supported 5b by a support plate 5a which is erected in front of the center of the inner bottom 1b.
Using this as a fulcrum, move the rear arm 7C from the fulcrum of the plate with a roughly Z-shaped cross section.
When the forearm 7d rises, the horizontal forearm 7d falls.

A locking piece 6 is attached to the front end portion of the forearm 7d, a spring 15 is interposed between the support rod 14 attached to the inner wall and the forearm 7d, and the lower end of the locking piece 6 is connected to the locking piece through the hole 1C of the inner bottom 1b. 6 is integrally formed with the lever plate 7 so that it can be raised and lowered elastically.

Reference numeral 8 denotes a rotating box, which is the front plate 1d of the housing 1 (the right side in FIG. 1 is the front side).

) extends downward and is attached to the back of this spring spring 8.
Insert a into the interior and turn the wing screw 16 to roll up the spring. When you release the rotating box with the spring spring rolled up, the spring will unravel and rotate if left as it is, as shown in Figures 1 and 2. Thus, the stopper 17 is engaged with the lower end of the locking piece 6 to stop the rotational force of the rotating box 8.

Also, the tip of the locking piece 9 is connected to the lever 11 via the stopper 17.
The gas valve 10 which is held is kept open.

When the ball 2 fell down the ball drop table 3 due to the vibration of the earthquake and hit the ball receiver 4C, it was tilted backwards and placed on the lever plate 4a placed on the pedestal 4a of the lever plate holding table 4. The rear arm 7C of the lever plate 7 falls, and at that time, the forearm 7d is lifted by the spring 18, and therefore the locking rod 6
is pushed up, the stopper 17 comes off from the rod 6, and the rotation box 8
rotates, and the lock pawl 9 rotates the lever 11 to close the gas valve 10 and instantly cut off the gas supply, thereby preventing gas leakage and accidents such as ignition and explosion caused by this.

Further, as shown in FIG. 2, a ratchet gear 19 and a detent pawl 20 are provided on the front side of the rotating box 8 to prevent the spring from returning when it is wound.

Further, when the rotating box 8 rotates, the detent pawl 20 can be disengaged from the gear 19 by the action of the spring 21.

Reference numeral 22 is a hinge that allows the locking pawl 9 to move in the direction of the arrow to release the lever 11.

1e is a lid of the casing. Although the present invention is designed for use with city gas, it is also possible to provide an appropriate number of lock pieces on the rotating box 8 and use these to grip the handle of the valve of the gas cylinder to close the gas cylinder in the event of an earthquake. We are free to make any design changes other than those described in the specification and drawings within the scope of the spirit of the invention, such as changing the material of the ball to a suitable material, locking the rotation of the rotation box 8, etc. can.

According to the present invention, the casing of the device of the present invention is easily attached to the pipe of a city gas gas valve, and the ball 2 placed on the ball dropping table 3 in the casing 1 is damaged by the shaking of the earthquake. The lever base, which had been resting on the base 4a of the engaging base 4, fell down and hit the ball receiver 4C of the lever plate holding base 4, which was swingably supported, and when it was tilted. The rear end of the lever plate 7 comes off and falls, and the front end of the lever plate 7 is lifted up by the lever action, and the locking piece 6 integrated therewith is lifted and unlocks the rotating box 8. 8 is rotated and the lever 11 is moved via the locking pawl 9 to quickly close the stopper. Therefore, the structure is simple and operates accurately.

For example, since it does not use anything that emits sparks as a power source, it is safe with no risk of explosion or fire.

In addition, in order to install the present device in preparation for an earthquake, the ball 2 is placed on the ball drop table 3 and the rear end of the lever plate 7 is placed on a part of the pedestal 4a of the lever plate engagement table 4. The lower end of the rod 6 protrudes below the hole in the inner bottom.

The spring of the rotating box 8 is wound up and locked to the stopper 17 and the locking rod 6 to prevent the rotating box 8 from moving, and the locking piece 9 is fitted into the lever 11 to complete the preparation, making the operation extremely easy and quick. Can be done.

When an earthquake occurs, the falling balls are used to operate the device, so it operates reliably, can be made small and low cost, can be widely used, and has great practical benefits such as being able to put mass production on track.

[Brief explanation of the drawing]

Figures 1 to 3 relate to the automatic gas valve opening/closing device for preventing earthquake disasters of the present invention. Figure 1 is a partially cutaway side view showing the device installed on a gas pipe and lever, and Figure 2 is a partially cutaway side view of the device. FIG. 3 is a front view of the main parts and a plan view with the lid of the casing partially cut away and the ball and ball drop table removed. 1...Housing, 1a...Inner wall, 1b...
...Inner bottom, 1C...hole, 1d...
Front plate, 1e... Lid, 2... Ball,
3...ball drop table, 3a...ball resting table, 4a...pedestal, 4b...spring, 4C...ball receiver, 4... Lever plate engagement base, 5a... Support plate, 5b... Pivotal support, 6... Locking rod, 7...・Lever plate, 8
...Rotating box, 9...Lock claw, 10...
...Gas valve, 11...Lever, 12.
... Gas pipe, 13 ... Fastener, 14
...Support rod, 15...Flip, 16...
... Thumb screw, 17 ... Stopper, 18.
... Spring, 19 ... Ratchet gear, 2
0... Detent claw, 21... Spring,
22... Hinge.

Claims (1)

[Scope of utility model registration request] A casing 1 attached to a gas pipe 12 fixed to a gas valve 10, a ball drop table 3 fixed to the inner wall 1a of the casing 1 and tilted to hold a ball 2 and cause it to fall due to earthquake vibrations, and a casing. A lever plate retaining stand 4 is swingably supported via a spring 4b so as to be tilted by the impact of the ball 2 on the rear part of the inner bottom 1b of the casing 1, and a lever plate holding stand 4 is erected on the inner bottom of the casing 1. It is supported by a shaft 5b via a support plate 5a, and the rear end 7a is always placed on the lever plate holding stand 4, and is elastically supported by the front end 7b together with the lever plate 7. A lever plate 7 having a locking rod 6 that can be raised and lowered through a hole 1C provided in the bottom surface 1b, and a lever plate 7 that is rotatably attached to the lower front end of the casing 1 and driven by the operation of an internal spiral spring 8a. An automatic gas valve closing device for preventing earthquake disasters, comprising a moving box 8 and a locking pawl 9 attached integrally thereto and designed to hold a lever 11 of a gas valve 10.