JP2002372224A - Safety shutoff device for gas instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device for forgotten extinguishment of a gas instrument wherein handling thereof is easy, and a mechanical driven timer is adopted, and further measures for troubles are installed thereto. SOLUTION: There are provided a valve opening/closing mechanism 2 having a shutoff energyzing function coupled between a gas supply pipe and a gas instrument, a first timer mechanism 3 and a second timer mechanism 4 operable with different mechanism timer actuation sources (32, 41) to act an opening/ closing actuation section of the opening/closing valve mechanism, and a rotary control 5 for simultaneously driving the time actuation sources of both mechanisms and including a time indication section. Only when the opening/ closing actuation sections of both mechanisms are simultaneously operated, the valve is opened.

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 gas supply after a lapse of a predetermined time.

[0002]

2. Description of the Related Art In order to prevent accidents caused by forgetting to turn off a gas appliance, a safety device that shuts off gas supply after a lapse of a predetermined time has been used. This safety device is often directly incorporated in a gas stove or the like, and an electromagnetic valve is frequently used.

[0003] In recent years, the number of homes for the elderly alone has increased, and appliances that require complicated operations and appliances that require replacement of batteries are avoided. That is, some people avoid digital operation devices from the beginning, and some people prefer analog operation devices. Moreover, these generations prefer to use existing equipment as is, rather than modifying existing equipment to ensure safety. Therefore, if a safety device employing a mechanical drive timer by analog operation is to be employed, the occurrence of a failure must be considered naturally.

The present invention proposes a novel safety device which can be incorporated with existing equipment as it is, employs mechanically driven gas shut-off, and operates safely and reliably.

[0005]

A safety device for a gas appliance according to the present invention is operated by an on-off valve mechanism having a shut-off biasing function connected between a gas supply pipe and the gas appliance, and a different mechanical timer operation source. A first timer mechanism and a second timer mechanism that act on the opening and closing operation section of the opening and closing valve mechanism, and a rotary knob provided with a time display section while simultaneously driving the timer operation sources of both mechanisms. And the valve is opened only when the opening and closing action parts of both mechanism parts work simultaneously.

[0006] When the opening / closing valve mechanism is interposed between the gas supply pipe and the gas appliance and the rotary knob is operated by a predetermined angle, the timer driving energy is accumulated in the operation sources of both timers, and the two operation sources are operated. Starts the return operation and works as a timer. At the same time, the valves are opened by the simultaneous operation of the action parts of both timer mechanism parts, and when the action parts of either timer mechanism part return, the valve is shut off. As a result, even if one of the timer mechanisms fails during the operation, if the other timer mechanism operates, the gas is cut off properly.

[0007]

Next, an embodiment of the present invention will be described. The safety device for a gas appliance shown in the embodiment has a body 1
In addition, it comprises a valve opening / closing mechanism 2, a first timer mechanism 3, a second timer mechanism 4, and a rotary knob 5.

The valve opening / closing mechanism 2 includes a gas pipe connecting portion 21a,
The valve body 22 is provided with a valve chamber 21 and a valve body 22 therein. The valve body 22 is urged by a spring 23 in a shut-off direction, and an opening / closing operation part 24 continuous with the valve body 22 is projected forward. Become. Then, the gas pipe connecting portions 21a and 21b are fixed to the back of the main body 1 with the front portion opened, and the gas pipe connecting portions 21a and 21b are protruded from the main body 1 so that the opening / closing operation portion 24 is located at the center of the back of the opening concave portion.
The valve is opened by pressing the opening / closing operation part 24 to the back.

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

The timer section 32 is provided with a return rotation mechanism by a mainspring (timer operation source). The timer section 32 has a structure that allows the rotation of the rotary shaft 31. The mainspring is wound by the rotation operation), and the rotating shaft 31 is returned and rotated by a constant return operation.

The cam portion 33 uses the tail end of the rotating shaft 31 as an action portion 331, and has a projection 332 projecting from the outer periphery of the leading end of the rotating shaft 31 so as to bias the rotating shaft 31 toward the leading end. And a cam surface 333 on which the rotating shaft 31 moves in the axial direction by the rotation of the protrusion 332.

The second timer mechanism 4 comprises a timer 41, a drive unit 42, and an action unit 43. A timer (timer operation source) 41 is a so-called oil timer, which moves a piston in a cylinder by an external force, It is a well-known device that controls the return force due to the internal spring by moving the oil.

The timer 41 is driven only by the turning operation of the rotary knob 51.
It is necessary to adopt a structure in which the return operation of No. 1 does not relate to the return operation of the first timer mechanism 3 at all. Specifically, an operation pin 421 provided at an eccentric position of a rotary knob 51 of the rotary knob 5 described later, and a display plate 5 of the rotary knob 5
2 includes an operating body 422 provided on the back surface, a passive body 423 operated by the operating body 422, and a rotating arm 424 connected to the passive body 423 and directly operating the timer 41.

The pivot arm 424 pivots the base toward the main body,
The tip is connected to the timer 41. The passive body 423
A locking claw 425 for locking the base to the tip of the rotating arm 424, forcing the distal end to move along the inner peripheral surface of the main body 1, and for locking the distal end to the operating body 422, It is provided so as to protrude from the rotation area of the display plate 52 (the rear recess 522 of the display plate 52: inside the rear outer peripheral edge 521). Also, a timer 41 is provided on the inner peripheral surface of the main body where the locking claw 425 moves.
A projection 426 is provided in which the base of the locking claw 425 is detached from the inner peripheral surface in accordance with the operation range of.

The operating body 422 is provided on the rear side recess 5 of the display panel 52.
22 and the base is pivotally connected to the back surface of the display plate 51 so as to operate together with the display plate 51. The whole is disposed outside the projecting area of the locking claw 425, and the tip is bent. Thus, the bent portion 427 is stored in the storage recess 523 provided on the outer peripheral edge 521 of the rear surface, and the bent portion 427 is locked by the locking claw 425 by the swing of the operating body 422.
Further, the swinging mechanism of the operation body 422 biases the bent portion 427 to be stored in the storage recess 523, and provides the operation body 422 with an inclined hole 428. 428, the rotary knob 51 and the display panel 5
The relative movement of the operation pin 421 in the inclined hole 428 is performed by the rotation play with the second member 2 so that the bent portion 427 appears and disappears.

The action part 43 includes an action part 431 located between the action part 331 of the first timer mechanism part 3, the opening / closing operation part 24 of the valve opening / closing mechanism part 2, and an action shaft 432 for operating the action part 431. An operating arm 433 that is connected to the timer 41 to perform a timer operation as a rotational motion, 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. You. Note that the rotating arm 4
If a structure is adopted in which the base of the actuator 24 is pivoted to the operating shaft 434, 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,
Working body 331 of first timer mechanism 3 and valve opening / closing mechanism 2
The cross section is of a cam shape (weight type) so as to fill a gap between the opening and closing operation portion 24 of the opening and closing portion. That is, the transmission mechanism 435 is appropriately determined 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 operation arm 433 (= rotation angle of the operation shaft: about 30 degrees) corresponding to the piston advance / retreat distance of the oil timer and the operation shaft 4
It is determined appropriately in accordance with the rotation angle of 32 (about 90 degrees).

The rotary knob 5 has a display plate 52 also serving as a cover for covering the opening of the main body 1 and a display plate 52 connected to the display.
Knob 51 for inserting the tip of the rotating shaft 31 that has passed through
Consists of As described above, the rotary knob 51 is provided with the mounting hole 511 for the rotary shaft 31 and the operation pin 421, and the storage hole 512 for the switch 53 described later. An appropriate play is provided in connection with the display panel 52.

The display plate 52 is mounted so as to close the front opening of the main body, and the rear portion has an outer peripheral edge 521 and a rear concave portion 522 surrounded by the outer peripheral edge. Further, a pin hole 524 corresponding to the inclined hole 428 is provided. In particular, a switch 53 having electrodes facing each other is provided on the front surface side, the electrodes are stored in the storage holes 512 of the rotary knob 51, and the electrodes are pressed on the inner side surfaces of the storage holes 512 to switch on. Things. That is, the switch is turned on by the play operation of the rotary knob 51 in the setting direction, and is connected to the ignition electric circuit of the gas appliance, and the ignition spark is generated 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 an urging force for restoring the play of the rotary knob 51.

The gas supply pipes and the gas pipes of the gas appliances are connected and interposed between the gas pipe coupling portions 21a and 21b projecting from the back of the main body 1, and the rotary knob 51 is used when the gas appliances are used. Operate by a predetermined angle. This device is a safety device as a countermeasure for forgetting to turn it off, and the operation of the timer is not strictly required. Therefore, the operation time is generally set within one hour, and the rotation operation is performed over the entire range (about 270 degrees).

The rotation of the rotary knob 51 causes the rotation shaft 31 to move in conjunction therewith, thereby winding the mainspring (timer drive source) of the first timer mechanism 3. Further, the operation pin 421 and the inclined hole 428 are caused by a slight play operation between the rotary knob 51 and the display plate 52.
The relative position in the inside changes, and the operating body 422 swings. By the swing of the operation body 422, the bent portion 427 is moved to the storage recess 5.
23, and the locking claws 42
5, and the locking arm 425 is pressed to rotate the rotating arm 424, and at the same time, the timer 41 is given timer driving energy. Also, the tip of the passive body 423 is formed with a projection 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 and moves out of the movement 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, the rotation of the rotary knob 51 causes the protrusion 332 of the cam portion 33 of the first timer mechanism 3 to slide on the cam surface 333, and the rotary shaft 31 is moved backward. Further, the second timer mechanism unit 4 also operates the operation arm 433, the operation shaft 434, and the operation shaft 43
2 rotates and the operating body 431 rotates, and the opening / closing operating section 24 is pushed in by the action of the cascaded operating sections (the backward movement of the rotating shaft 31 and the rotation of the operating body 431) to open the valve. And gas can be supplied.

That is, the state shown in FIG. 1A is shifted to the state shown in FIG. 1D, and the valve is changed from the closed state to the open state. Then, the gas appliance can be used, and the gas cock of the gas appliance is operated and used as usual. Simultaneously with the use of this gas appliance, each timer mechanism 3, 4 performs a return operation,
After a certain time, the return rotation of the rotating shaft 31 causes the projection 332 to rotate.
Enters into the concave portion in the cam surface 333, the rotating shaft 31 moves forward, and the pressing of the opening / closing operation unit 24 is released.
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 operating arm 433, the operating shaft 434, the transmission mechanism 435, and the operating shaft 432, and after a lapse of a predetermined time, the operating body 431 is rotated to open and close. The pushing into the operating portion 24 is released, and the valve body 22 is turned off.

With the return operation of the oil timer 41, the passive body 423 and the rotating arm 424 of the drive section 42 also operate together, and the locking claw 425 of the passive body 423
Is in a state where it has advanced into the passage area of the bent portion 427 in the protruding state. However, at the time of the return operation of the display panel 52 (the return operation is performed in conjunction with the return operation of the first timer driving unit 3), the relative position between the operation body 422 and the operation pin 421 is determined by the return elasticity of the counter electrode of the switch 53, Since the bent portion 427 is stored in the storage recess 523 and the operation body 422 and the passive body 423 are disconnected, the return operation of the second timer mechanism 4 is performed by the return operation of the first timer mechanism. It works independently of anything.

Therefore, when the first timer mechanism 3 operates normally after a certain period of time, the gas shutoff is realized by the valve opening / closing mechanism 2, and the gas appliance is automatically shut off even if it is forgotten to turn off the gas appliance. And secure.

Further, in order to shut off the gas, since the action parts 331 and the action bodies 431 of both the timer mechanism parts 3 and 4 are provided in a tandem state, the first timer mechanism part 3 fails and does not perform the return operation. Even if the second timer mechanism operates normally, gas shutoff is realized (see FIG. 1).

When the gas appliance is used, even if the safety device is not operated and the stopper of the gas appliance is opened, gas is not supplied, but there is a possibility that residual gas may flow out. If the ignition switch is turned on in the operation described above, the residual gas can be burned.

The present invention is not limited to the above-described embodiment, and any combination of two timers having different operation sources can be arbitrarily determined. The opening / closing action structure of is also appropriately determined.

[0030]

As described above, the present invention provides an on-off valve mechanism having a shut-off biasing function connected between a gas supply pipe and a gas appliance, and an on-off valve mechanism operated by a different mechanical timer operating source. A first timer mechanism and a second timer mechanism that act on the opening and closing operation section of the section, and a rotary knob that simultaneously drives the timer operation sources of both mechanisms and has a time display section. A safety device for gas appliances that opens the valve only when the opening and closing action parts of the unit work at the same time, allowing existing appliances to be used as they are, and a simple mechanical timer without using electronic components By adopting,
This eliminates the hassle of battery replacement and the like, and ensures safe operation by employing a double timer even when a mechanical drive failure occurs.

[Brief description of the drawings]

1A and 1B are explanatory diagrams of an operation example of an action unit according to an embodiment of the present invention, in which FIG. 1A shows a normal interruption (B) and FIG.

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

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

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

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

6A and 6B are front views of the drive unit of the second timer mechanism unit in a return state, wherein FIG. 6A shows a passive body and a rotating arm, and FIG.

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1 2 Valve opening / closing mechanism part 21a, 21b Gas pipe connection part 22 Valve body 23 Spiral 24 Opening / closing operation part 3 First timer mechanism part 31 Rotating shaft 32 Timer part 33 Cam part 331 Working part 332 Projection 333 Cam surface 4 Second Timer mechanism section 41 Timer 42 Drive section 421 Operation pin 422 Operation body 423 Passive body 424 Rotating arm 425 Locking claw 426 Projection 427 Bending section 428 Inclined hole 43 Working section 431 Working body 432 Working axis 433 Working arm 434 Working axis 435 Transmission mechanism 5 Rotating knob 51 Rotating knob 511 Mounting hole 512 Storage hole 52 Display plate 521 Outer edge 522 Back recess 523 Storage recess 524 Pin hole 53 Switch

Claims (3)

[Claims] An opening / closing valve mechanism 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 operated by a different mechanical timer operation source. A first timer mechanism and a second timer mechanism that operate, and a rotary knob that simultaneously drives the timer operation sources of both mechanisms and has a time display section, and the opening and closing action sections of both mechanisms are valves at the same time. A safety device for gas appliances, characterized in that the valve is opened only when it is opened. 2. The gas appliance safety device according to claim 1, wherein each timer operation source is constituted by a mainspring and an oil timer. 3. The valve opening / closing section according to claim 2, wherein the action sections of each timer mechanism section are cascaded with respect to the operation direction of the opening / closing section of the valve opening / closing mechanism section, and the valve is opened by pressing the opening / closing section in the tandem state. Gas appliance safety device.