JPS6246059Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas main valve opening/closing device.

Generally, the gas main valve is installed outdoors and supplies gas to indoor gas ranges, gas stoves, and other gas appliances through piping. It was a hassle to go outside and open and close the main valve lever. However, neglecting to open and close the main valve often causes gas to inadvertently leak from gas appliances, causing gas poisoning, gas explosions, and the like.

In view of the troublesome operation of opening and closing an outdoor gas main valve, the present invention provides a device that allows a main valve lever to be opened and closed by operating a switch indoors.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In Figures 1 to 3, reference numeral 1 denotes a robust case, and inside this case 1 there are an existing main valve A to which a gas supply pipe C is connected on both sides, a lever B for opening and closing the main valve, and a lever B to be described later. The entire device, including the rotation mechanism, is now incorporated.

The case 1 can be divided into upper and lower parts, connected from the upper and lower sides via a supply pipe C, and fixed with screws and attached to the supply pipe C. The main stopcock A is housed inside the case 1, and the supply pipe C is extended outside the case 1.

A drive gear 4 is fixed to the upper end of a drive shaft 3 of a reversely rotatable geared motor 2 installed and fixed in a case 1, and this gear 4 meshes with a gear 5. The gear 5 has an upper and lower two-layer structure with different diameters, and the upper gear 5b, which has a smaller diameter, is approximately twice or more thick than the lower gear 5a, which has a larger diameter.

The gear 4 meshes with a lower gear 5a, and the upper gear 5b meshes with a lever rotation gear to be described later. The gear 5 is installed on the upper plate 1a of the case 1 via a rotating shaft 6, the rotating shaft 6 penetrates the upper plate 1a and protrudes to the outside, and the lower part of the rotating shaft 6 is connected to the case 1 or the geared motor. 2
The gear 5 and rotating shaft 6 are fitted into a spring 8 placed on a support plate 7 which is horizontally connected and fixed to the gear 5, and the elasticity of the spring 8 always gives the gear 5 and the rotating shaft 6 the tendency to press upward.

The gear 9 for rotating the lever is fan-shaped, and its base, which coincides with the center of rotation of the lever B, is rotatably supported on the upper plate 1a, and a clamping body 11 protrudes from the lower surface of the gear 9. It has been set up. This clamping body 1
1 is a gear 9 so as to engage with a lever B for opening/closing a gas main valve A provided in the middle of the supply pipe C.
It is provided on one side of the peripheral part along the circumferential surface of the gear.

The present invention has the above-mentioned configuration, and the state of use will be explained next.

In FIG. 2, it is perpendicular to the supply pipe C.
The position of the lever B indicated by the solid line is a state in which the main valve A is closed and the gas supply is stopped. When the geared motor 2 is driven to rotate by operating a switch indoors in this lever A position, the rotational torque increased approximately 10 times is transmitted to the rotating gear 9 via the drive gear 4 and the double-layer gear 5. , gear 9 is A
Forcibly rotate the lever B in the direction of the arrow to fully open the main valve A at the chain line position parallel to the supply pipe C, making it possible to supply gas.

Next, when closing the main valve A, the geared motor 2 is rotated in the opposite direction to the above by operating the indoor switch, and the lever B is rotated to the solid line position by the rotation of the drive gear 4, the double-layer gear 5, and the rotation gear 9. Just let it happen.

The lever 9 is rotated using the geared motor 2 as a drive source, and stopped by turning off the indoor switch depending on the elapsed time.In order to ensure that the lever B is stopped in the open or closed position, a limit switch, It is also possible to install a photodetector or the like inside the case 1 to detect the lever B position and stop the geared motor 2.

The above explanation is for the case where the lever is rotated by remote control from indoors, but manual rotation is also possible.

That is, if the rotating shaft 6 is pushed down against the upward elasticity of the spring 8, the gear 5 will also move downward.
The gear 4 and the lower gear 5a of the gear 5 are disengaged, but since the upper gear 5b is thick, the engagement state between the gear 5b and the rotating gear 9 is maintained, and in this state, the rotating shaft 6 can be manually rotated. When rotated, lever B can be rotated.

According to the present invention described above, the outdoor main valve can be automatically opened and closed by operating the indoor switch.
Eliminates the hassle of opening and closing the main valve. Further, since the lever rotation is performed by a gear mechanism, the structure is simple and the rotation operation can be performed reliably.

In particular, in the present invention, as mentioned above, case 1
Since it can be separated, it can be easily installed to surround the existing gas main valve.

Furthermore, by disengaging the driving gear 4 and the lower gear 5a and leaving only the meshing between the gear 5b and the gear 9, the gear 9 can be manually operated.
It is extremely convenient in the event of a power outage or maintenance inspection. Furthermore, since the gear 9 has a fan shape, the rotation angle can be minimized, which has the advantage of making the whole device smaller.

The device of the present invention can be electrically connected to conventional gas leak alarms, earthquake sensing devices, etc., and can automatically close the main valve when a gas leak, earthquake, etc. occurs while the main valve is open.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view. 1 is a case, 2 is a geared motor, 3 is a drive shaft, 4 is a drive gear, 5 is a two-layer structure gear, 6 is a rotating shaft, 7 is a support plate, 8 is a spring, 9 is a rotating gear, 11 is a clamping body It is.

Claims (1)

[Scope of utility model registration request] A drive gear 4 fixed to a drive shaft 3 of a geared motor 2 that can rotate in reverse and is installed in a robust case 1 that can be divided into upper and lower parts into which the entire device is incorporated.
and a two-layer structure gear 5 in which an upper gear 5b having a smaller diameter is thicker than a lower gear 5a having a larger diameter which is rotatably supported on the upper plate 1a of the case 1 by a rotating shaft 6, and a fan-shaped base. It consists of a lever rotation gear 9 rotatably supported on the upper plate 1a,
Gear 4, lower gear 5a and upper gear 5b
The rotating shaft 6 and the gear 5, which protrude from the upper plate 1a to the outside, are pressed upward by the elasticity of the spring 8 installed between the support plates 7, and the lower surface of one side of the periphery of the gear 9 is engaged with the gear 9. A gas main valve opening/closing device characterized in that a downward U-shaped clamping body 11 protruding from the side is engaged with an opening/closing lever B of a gas main valve A surrounded in a case 1.