JP3488702B2 - Safety shut-off device for gas appliances - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a gas appliance which is interposed between a gas appliance and a gas supply pipe and automatically shuts off the gas supply after a lapse of a certain time.

[0002]

2. Description of the Related Art In order to prevent accidents caused by forgetting to turn off the gas appliances, it is common practice to employ a safety device that shuts off the gas supply after a certain period of time. This safety device is often directly incorporated in a gas stove or the like, and an electromagnetic valve is often used.

By the way, in recent years, the number of households only for the elderly is increasing, and appliances that are complicated to operate and appliances that require replacement of batteries are shunned. That is, some people are shy of digital operation devices from the beginning, and some prefer analog operation devices. Moreover, these generations prefer to use the existing equipment as it is, rather than changing the existing equipment to ensure safety. Therefore, when trying to adopt a safety device that employs a mechanical drive timer by analog operation, it is of course necessary to consider the occurrence of a failure.

The present invention proposes a novel safety device which can be incorporated into existing equipment as it is, and which employs mechanically driven gas shutoff to operate safely and reliably.

[0005]

A safety device for a gas appliance according to the present invention operates with an opening / closing valve mechanism section having a shut-off urging function connected between a gas supply pipe and a gas appliance, and a mechanical timer actuation source different from each other. A first timer mechanism section and a second timer mechanism section that act on the opening / closing operation section of the on-off valve mechanism section, and a rotary knob section that simultaneously drives the timer operation sources of both mechanism sections and has a time display section. It is characterized in that the valve is opened only when the opening and closing action parts of both mechanism parts work simultaneously.

When the open / close valve mechanism is interposed between the gas supply pipe and the gas appliance and the rotary knob is operated by a predetermined angle, timer driving energy is accumulated in the operation sources of both timers, and both of the operation sources are operated. Enters the return operation and works as a timer. At the same time, the valves are opened by the simultaneous operation of the operating parts of both timer mechanism parts, and the valve is shut off when the operating part of any of the timer mechanism parts returns. As a result, even if one of the timer mechanism units fails during operation, if the other timer mechanism unit operates, the gas can be cut off properly.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described. The safety device for a gas appliance shown in the embodiment has a main body 1
In addition, the valve opening / closing mechanism 2, the first timer mechanism 3, the second timer mechanism 4, and the rotary knob 5 are included.

The valve opening / closing mechanism portion 2 includes a gas pipe connecting portion 21a,
21b is provided so as to project the valve chamber and the valve body 22 inside, and the valve body 22 is urged by the ridge 23 in the closing direction to project the opening / closing operation portion 24 continuous with the valve body 22 to the front. Become. Then, the gas pipe connecting portions 21a and 21b are fixed to the inner side of the main body 1 with the front portion opened, and the gas pipe connecting portions 21a and 21b are projected from the main body 1 so that the opening / closing operation portion 24 is located at the inner center of the opening concave portion.
The valve is opened by pressing the opening / closing operation portion 24 inward.

The first timer mechanism section 3 includes a rotary shaft 31 and
It is composed of a timer unit 32 and a cam unit 33. The rotary shaft 31 is mounted in front of the opening / closing operation unit 24 with the operating direction of the opening / closing operation unit 24 as the axial direction, and the tip thereof is attached to a rotary knob 51 to be described later, and performs a rotating operation together with the rotary knob unit 5. It is installed so that it can slide freely in the axial direction.

The timer portion 32 is provided with a return rotation mechanism by means of a mainspring (timer operation source), has a structure which allows the rotation shaft 31 to slide, and rotates the rotation shaft 31 (of the rotary knob 51). The mainspring is wound by (rotating operation), and the rotating shaft 31 is returned and rotated by a constant returning operation.

The cam portion 33 causes the tail end portion of the rotary shaft 31 to act as an action portion 331. A protrusion 332 is provided on the outer periphery of the tip end of the rotary shaft 31 so that the rotary shaft 31 has a sliding biasing force toward the tip end. And a cam surface 333 on which the rotary shaft 31 moves in the axial direction by the rotation of the protrusion 332.

The second timer mechanism section 4 is composed of a timer 41, a drive section 42, and an action section 43. The timer (timer actuation source) 41 is a so-called oil timer, and the piston in the cylinder is moved by an external force to move the cylinder. It is a known one in which the returning force due to the internal spring is controlled by the movement of oil.

In the drive unit 42, the timer 41 is driven only by the turning operation of the rotary knob 51, and the timer 4
It is necessary to have a structure in which the returning operation of 1 is not related to the returning operation of the first timer mechanism section 3 at all. Specifically, the operation pin 421 provided at the eccentric position of the rotary knob body 51 of the rotary knob portion 5 and the display plate 5 of the rotary knob portion 5 described later.
The operation body 422 provided on the back surface of the second body 2, the passive body 423 operated by the operation body 422, and the rotating arm 424 connected to the passive body 423 to directly operate the timer 41.

The rotating arm 424 pivotally locks the base portion to the main body side,
The tip is connected to the timer 41. The passive body 423 is
The base is pivotally fixed to the tip of the rotating arm 424, the tip side is biased so as to move along the inner peripheral surface of the main body 1, and the tip has a locking claw 425 that locks with the operating body 422. The display plate 52 is provided so as to project in a rotation region (a rear concave portion 522 of the display plate 52: an inside of a rear outer peripheral edge 521). Further, the timer 41 is provided on the inner peripheral surface of the main body on which the locking claw 425 moves.
The base of the locking claw 425 is provided with a projection 426 that is disengaged from the inner peripheral surface in correspondence with the operating range of the above.

The operating body 422 is a rear recess 5 of the display plate 52.
22, the base is pivotally connected to the back surface of the display plate 51 so as to operate together with the display plate 51, and the whole is arranged outside the projecting region of the locking claw 425, and the tip is bent. Thus, the bent portion 427 is housed in the housing recess 523 provided on the outer peripheral edge 521 of the back surface, and the bent portion 427 is locked by the locking claw 425 when the operating body 422 swings.
Further, the swinging mechanism of the operating body 422 urges the bent portion 427 to be stored in the storage recess 523, and the operating body 422 is provided with an inclined hole 428 so that the tip of the operating pin 421 is inclined. Inserted in 428, the rotary knob 51 and the display plate 5
The operation pin 421 in the inclined hole 428 is relatively moved by the rotational play with respect to 2, so that the bent portion 427 appears and disappears.

The operating portion 43 is an operating body 431 located between the operating portion 331 of the first timer mechanism portion 3 and the opening / closing operating portion 24 of the valve opening / closing mechanism portion 2, and an operating shaft 432 for operating the operating body 431. And an operating arm 433 that is connected to the timer 41 to rotate the timer operation, an operating shaft 434 that is rotationally driven by the operating arm 433, and a transmission mechanism 435 that connects the operating shaft 432 and the operating shaft 434. It The rotating arm 4
When the structure in which the base of 24 is pivotally fixed to the operating shaft 434 is adopted, the rotating arm 424 plays the role of the operating arm 433 without incorporating the operating arm 433.

The action body 431 is rotated by the action shaft 432.
The action body 331 of the first timer mechanism unit 3 and the valve opening / closing mechanism unit 2
The cross section has a cam shape (weight type) so as to fill the gap between the open / close operation part 24 and the action shaft 432, and the action shaft 432 is appropriately supported so as not to be restricted to the rotational movement in the fixed axis direction. Therefore, the transmission mechanism 435 appropriately determines according to the axial direction to be transmitted, such as a bevel gear. The ratio of the number of teeth of each gear is determined by the rotation angle of the operating arm 433 (= operating shaft rotation angle: about 30 degrees) and the operating shaft 4 corresponding to the piston advance / retreat distance of the oil timer.
It is appropriately determined according to the rotation angle of 32 (about 90 degrees).

The rotary knob 5 is a display plate 52 which also serves as a lid for covering the opening of the main body 1, and a display plate 52 which is connected to the display.
Rotating knob body 51 for inserting the tip of the rotating shaft 31 penetrating therethrough
Consists of. As described above, the rotary knob 51 is provided with the mounting hole 511 of the rotary shaft 31 and the operation pin 421, and is also provided with a storage hole 512 for the switch 53 described later. Appropriate play is provided for the connection with the display plate 52.

The display plate 52 is attached so as to close the front opening of the main body, and the rear face portion is provided with an outer peripheral edge 521 and a rear concave portion 522 surrounded by the outer peripheral edge, and in the play range of the operation pin 421 as described above. Moreover, a pin hole 524 corresponding to the inclined hole 428 is provided. In particular, a switch 53 having an electrode facing each other is provided on the front surface side, the electrode is stored in the storage hole 512 of the rotary knob 51, and the electrode is pressed on the inner side surface of the storage hole 512 to switch on. It is a thing. That is, the switch is turned on by the play operation of the rotary knob body 51 in the setting direction, and the switch is connected to the electric circuit for ignition of the gas appliance to generate the spark for ignition when the switch is turned on. If you release the operation in the set direction at the same time,
The facing electrode of the switch 53 serves as a biasing force for restoring the play of the rotary knob 51.

Thus, the gas supply pipes and the gas pipes of the gas appliances are connected to the gas pipe connecting portions 21a and 21b protruding from the rear surface of the main body 1 and interposed therebetween, and the rotary knob 51 is used when the gas appliances are used. Operate at a specified angle. This device is a safety device as a measure against forgetting to turn it off, and since strictness is not required for the timer operation, the operating time is generally within one hour and the rotary operation is performed to the full extent (about 270 degrees).

When the rotary knob 51 is rotated, the rotary shaft 31 is interlocked to wind the mainspring (timer drive source) of the first timer mechanism section 3. Further, a slight play between the rotary knob 51 and the display plate 52 causes the operation pin 421 and the inclined hole 428 to move.
The relative position inside changes, and the operating body 422 swings. Due to the swinging of the operating body 422, the bent portion 427 causes the storage concave portion 5 to move.
23, and the locking claws 42 are projected along with the rotation of the display plate 52.
5, the lock claw 425 is pressed to rotate the rotating arm 424, and at the same time, timer driving energy is applied to the timer 41. In addition, the tip portion of the passive body 423 has the protrusion 4 so that the timer 41 does not exceed the driving range.
26, the tip of the passive body 423 (the locking claw 42
5) moves in the direction of the rotating shaft 31 to move out of the moving region of the bent portion 427, and the locking between the locking claw portion 425 and the bent portion 427 is released (FIG. 6).

At the same time, by the rotating operation of the rotary knob 51, the projection 332 of the cam portion 33 of the first timer mechanism portion 3 slides on the cam surface 333, and the rotary shaft 31 is moved inward. Further, the second timer mechanism section 4 also operates the arm 41, the operation shaft 434, and the operation shaft 43 by the energy saving operation of the timer 41.
2 rotates, the action body 431 rotates, and by the action of the vertically arranged action parts (the backward movement of the rotary shaft 31 and the action body 431 rotation), the opening / closing operation part 24 is pushed in and the valve is opened. , Gas can be supplied.

That is, the state of FIG. 1 (a) is changed to the state of (d), and the closed state of the valve is changed to the open state. Then, the gas appliance can be used, and the gas plug of the gas appliance is operated and used as usual. At the same time when this gas appliance is used, each timer mechanism section 3 and 4 performs a return operation,
After a lapse of a certain time, the protrusion 332 is formed by the return rotation of the rotary shaft 31.
Enters into the concave portion of the cam surface 333, the rotating shaft 31 moves forward, releasing the pressing of the opening / closing operation portion 24,
The valve body 22 is closed.

At the same time, the return operation of the oil timer 41 sequentially transmits the return operation to the operation arm 433, the operation shaft 434, the transmission mechanism 435, and the action shaft 432, and after a certain period of time, the action body 431 rotates to open and close. Pushing into the actuating portion 24 is released, and the valve body 22 is shut off.

With the return operation of the oil timer 41, the passive body 423 of the drive unit 42 and the rotating arm 424 are also operated together, and the locking claw 425 of the passive body 423 is operated by the operating body 422.
In this state, the bent portion 427 has advanced to the passing area of the bent portion 427. However, in the return operation of the display plate 52 (the return operation is performed along with the return operation of the first timer drive unit 3), the relative position of the operation body 422 and the operation pin 421 is the return elasticity of the counter electrode of the switch 53. Since the folded portion 427 is stored in the storage recess 523 and the operation body 422 and the passive body 423 are disconnected from each other, the return operation of the second timer mechanism section 4 is the return operation of the first timer mechanism section. It works independently regardless of.

Therefore, after the lapse of a certain period of time, when the first timer mechanism section 3 operates normally, the valve opening / closing mechanism section 2 realizes gas shutoff and automatically shuts off even if the gas appliance is forgotten to be turned off. Is safe.

Further, for shutting off the gas, since the action parts 331 and the action bodies 431 of both timer mechanism parts 3 and 4 are provided in a tandem state, the first timer mechanism part 3 fails and the return operation is not performed. Even so, gas shutoff is realized when the second timer mechanism operates normally (see FIG. 1).

When the gas appliance is used, even if the safety device is not operated and the plug of the gas appliance is opened, the gas is not supplied, but there is a possibility that the residual gas may flow out. Therefore, the rotary knob 51 If the ignition switch is turned on by this operation, the residual gas can be burned.

Further, the present invention is not limited to the above-mentioned embodiment, and the selection combination of two timers having different operation sources can be arbitrarily determined, and the timer for the opening / closing valve mechanism can be determined. The opening and closing action structure of is also appropriately determined.

[0030]

As described above, according to the present invention, an on-off valve mechanism unit having a shut-off urging function connected between a gas supply pipe and a gas appliance and an on-off valve mechanism operating with a different mechanical timer operating source are provided. Both mechanisms including a first timer mechanism section and a second timer mechanism section that act on the opening and closing operation section of the section, and a rotary knob section that simultaneously drives the timer operation sources of both mechanism sections and has a time display section. This is a safety device for gas appliances that opens the valve only when the parts that act on the opening and closing of the parts work at the same time. Existing appliances can be used as they are, and a simple mechanical timer without using electronic parts. By adopting
This eliminates the hassle of battery replacement and employs a dual timer even when a mechanical drive failure occurs so that it can operate safely and reliably.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an operation example of a working unit according to an embodiment of the present invention, in which (a) shows a normal cutoff (b) and (c) while a failure state (d) shows an open state.

FIG. 2 is a sectional view of the valve opening / closing mechanism section.

FIG. 3 is an explanatory diagram of a cam portion of the first timer mechanism portion.

FIG. 4 is a side view of the first timer unit.

FIG. 5 is a front view of a driving start state of a driving unit of the second timer mechanism unit, where (a) shows a passive body and a rotating arm and (b) shows an operating body.

FIG. 6 is a front view of the drive section of the second timer mechanism section in a returned state, in which (a) shows a passive body and a rotating arm, and (b) shows an operating body.

FIG. 7 is a rear perspective view of the display board.

FIG. 8 is a side view of the second timer mechanism section.

FIG. 9 is an assembled sectional view of the same.

FIG. 10 is an exploded explanatory view of the rotary knob portion.

[Explanation of symbols]

1 body 1 2 Valve opening / closing mechanism 21a, 21b Gas pipe connection part 22 valve body 23 lines 24 Opening / Closing part 3 First timer mechanism 31 rotation axis 32 timer 33 Cam part 331 Action part 332 protrusion 333 Cam surface 4 Second timer mechanism 41 timer 42 Drive 421 Operation pin 422 operation body 423 Passive body 424 rotating arm 425 locking claw 426 protrusion 427 Bent section 428 inclined hole 43 Working part 431 agent 432 Working axis 433 actuating arm 434 Working shaft 435 transmission mechanism 5 rotary knob 51 Rotating knob 511 mounting hole 512 storage hole 52 display board 521 outer peripheral edge 522 Back recess 523 Storage recess 524 pin hole 53 switch

Claims (3)

(57) [Claims] 1. An opening / closing valve mechanism section having a shut-off urging function connected between a gas supply pipe and a gas appliance, and an opening / closing operation section of the opening / closing valve mechanism section operated by different mechanical timer operating sources. It is equipped with a first timer mechanism section and a second timer mechanism section that operate, and a rotary knob section that simultaneously drives the timer operation sources of both mechanism sections and has a time display section, and the opening and closing action sections of both mechanism sections simultaneously operate the valve. A safety device for gas appliances characterized in that the valve is opened only when it is opened. 2. The safety device for a gas appliance according to claim 1, wherein each timer operation source is constituted by a mainspring and an oil timer. 3. The valve opening mechanism according to claim 2, wherein the operating portions of each timer mechanism portion are arranged in a row in the direction of movement of the opening / closing operation portion of the valve opening / closing mechanism portion, and the opening / closing operation portion is pressed in the column state to open the valve. Gas appliance safety device.