JPH0461250B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for an operating part for igniting and extinguishing a gas appliance such as a gas stove.

When igniting a gas appliance, it is easier to ignite it by setting the gas flow rate to maximum, so you can return the fire power adjustment control unit to the maximum position as soon as the fire is extinguished, and keep it in this position at all times when the gas is extinguished. There are some that are designed to lock like this. Furthermore, in order to prevent the ignition from being accidentally ignited due to a child's mischief, some devices are designed to lock the ignition operating member so that it cannot be operated in the extinguished state. However, many conventional locking devices of this type have complex combinations of cams and link devices, resulting in a complex structure and high cost.

The present invention has focused on this point, and has been made with the object of providing a locking device for the operation part of a gas appliance that has a simple structure, can be manufactured at low cost, and is reliable in operation. In a locking device for the operation part of a gas appliance, which is configured so that the fire power adjustment operation part returns to the maximum fire power position in the extinguishing state in conjunction with the operation, by changing the posture in response to the operation of the extinguishing operation part, In the extinguished state, it locks on the firepower adjustment operation part and makes it impossible to move the firepower adjustment operation part in the direction of the minimum firepower position, and in the ignition state, it does not lock with the firepower adjustment operation part and allows the firepower adjustment operation in the direction of the minimum firepower position. The first locking member allows movement of the part, and the position changes according to the operation of the ignition/extinguishing operation part, so that it can be connected to the fire power adjustment operation part only in the extinguishing state; and a second locking member that disables the ignition operation of the ignition/extinguishing operation section when the ignition/extinguishing operation section is activated.

That is, in the extinguished state, the first locking member locks the firepower adjustment operation part that has returned to the maximum firepower position, so the firepower adjustment operation part cannot move toward the minimum firepower position and is held at the maximum firepower position where ignition is easy. Ru. Further, in this extinguished state, the second lock member can be connected to the fire power adjustment operation section, and when connected, the second lock member becomes a so-called child lock state and cannot be operated to ignite.

Next, the present invention will be specifically explained with reference to an illustrated embodiment.

FIG. 1 is a partially cutaway schematic plan view, and FIG. 2 is a schematic side view. Reference numerals 1 and 2 are a piano touch type ignition operating member and extinguishing operating member, respectively, which are attached to a support shaft 5 attached to a frame 4. 3 is a sliding firepower adjustment member, and a guide shaft 5 coaxially extends from one end of the support shaft 5.
It is supported by a. Reference numeral 6 denotes a gas tank main body which is fixed to the frame 4, and a main valve and a pilot valve installed therein are opened and closed by pushing out a main valve opening/closing button 7 and a pilot valve opening/closing button 8. Reference numeral 9 denotes a gas flow rate regulator, in which a gear cam (not shown) meshing with a sector gear 10 connected to the thermal power adjustment member 3 rotates to adjust the flow rate. 11 is an igniter equipped with an ignition element 12, a hammer 13, a claw cam 14, and the like.

Reference numeral 21 denotes a first cam made of a U-shaped metal fitting fixed to the support shaft 5, and the operating portion 1a is integrally molded to constitute a part of the ignition operating member 1. Further, 22 is a second cam made of a U-shaped metal fitting, which is disposed inside the first cam 21 and is attached to the support shaft 5.
It is loosely inserted into. Reference numeral 23 denotes a fire extinguishing cam made of a U-shaped metal fitting, with an operating portion 2a integrally molded to constitute a part of the extinguishing operation member 2, and loosely inserted into the support shaft 5.

FIG. 3 is a perspective view of each of these cams 21, 22, 23, and the first cam 21 is provided with a D-shaped hole 25 for non-rotatably mounting it on the support shaft 5, as shown in FIG. 3a. A cam portion 26 having a cut portion 26b extending from a circumferential edge 26a toward the center is formed at the lower part of one side piece, and an engaging claw 27 is formed at the upper portion toward the inside. ing. The second cam 22 is provided with a round hole 28 for rotatably attaching it to the support shaft 5, as shown in FIG. 3b, and has a notch 29b extending from the circumferential edge 29a toward the center. A portion 29 is provided to protrude so as to partially overlap the cam portion 26 of the first cam 21, and an engaging claw 27 is provided on the upper portion.
A notch groove 30 is formed corresponding to the groove. Furthermore, a cam portion 31 having a circumferential edge 31a is provided protruding from the lower portion of the other side piece, and a locking groove 32 is formed at the upper portion. As shown in Fig. 3c, the fire extinguishing cam 23 has a round hole 33 formed therein for rotatably attaching it to the support shaft 5, and a convex cam portion 34 for unlocking is formed on one side piece. A cam portion 35, to which a push rod 36 for operating the sector gear is connected, is protruded from the lower part of the other side piece.

41 is a second support shaft provided below the support shaft 5; 42 and 43 are an intermediate lever and a pilot lever made of U-shaped metal fittings rotatably supported on the second support shaft 41; Lever 4
2 includes the cam portions 2 of the first cam 21 and the second cam 22.
An engaging pin 44 is provided which slides into contact with the pilot levers 6 and 29, and a separately provided pin 45 engages with an elongated hole 46 of the pilot lever 43. An ignition lever 47 is made of a spring material, and its base end is fixed to the frame 4 so as to be in sliding contact with the cam portion 31 of the second cam 22. The ignition lever 47 and the pilot lever 43 open and close the main valve, respectively, when activated. Button 7
and is placed in a position to press the pilot opening/closing button 8.

Return springs 51, 52, and 53 are coil springs fitted into the support shaft 5. The return spring 51 has one end engaged with the upper plate (not shown) of the frame 4 and the other end engaged with the lower end of the cam portion 26 of the first cam 21 to apply a return force to the first cam 21, that is, the ignition operating member 1. The return spring 52 has one end engaged with the frame 4 and the other end engaged with the second cam 22 to apply a return force to the second cam 22. Similarly, the return spring 53 has one end engaged with the frame 4 and the other end engaged with the fire extinguishing cam 23 to apply a return force to the fire extinguishing cam 23, that is, the extinguishing operation member 2. Reference numeral 55 designates a similar return spring, which is fitted into the second support shaft 41 and has one end attached to the intermediate lever 42.
The other end is locked to a pilot lever 43, and the intermediate lever 42 is biased with a rotational force in the direction of the cams 21 and 22, and the pilot lever 43 is biased with a rotational force in the direction of the pilot valve opening/closing button 8. As will be described later with reference to FIG. 5 and subsequent figures, a lock spring 57 having a locking portion 57a that engages with the lock groove 32 of the second cam 22 is provided on the upper plate of the frame 4. A is the ignition operating member 1 as described above;
This is a fire extinguishing operation section that includes a fire extinguishing operation member 2, various cams 21, 22, 23, various levers 42, 43, 47, and the like.

The firepower adjustment member 3 includes a slider 61 that is slidably inserted into the guide shaft 5a, and an operation section 3a that is integrally molded with a guide plate 62 that is fixed to the slider 61.
The end of the sector gear 10 is connected to the guide plate 62 by a pin 63, and the sector gear 10 is connected to the guide plate 62 by moving it left and right along the guide shaft 5a.
0, the gas flow regulator 9 is driven, and moving the operating section 3a to the left decreases the thermal power, and moving the operating section 3a to the right increases the thermal power. B indicates a firepower adjustment operation section that includes the firepower adjustment member 3 and the like as described above.

The other end of the sector gear 10 has a connecting piece 10a.
is provided, and one end of the push rod 36 connected to the cam part 35 of the fire extinguishing cam 23 connects to the connecting piece 10.
a, and when the operating part 2a is pushed down, the bent part 36a of the push rod 36 is inserted into the connecting piece 10a.
is pressed, the sector gear 10 rotates counterclockwise, and the firepower adjustment operation part B moves to the maximum firepower position at the right end of the guide shaft 5a.

Reference numerals 65 and 66 indicate first shafts having a D-shaped outer shape formed near the right end and the rightmost end of the guide shaft 5a, respectively.
and a second lock member, and the guide plate 6 corresponds to these lock members 65 and 66.
2 has a D-shaped guide hole 6 through which the guide shaft 5a passes.
7 is provided. The lock members 65 and 66 rotate with the operation of the ignition operating member 1, but when the ignition operating member 1 is in the ignition position as shown by the chain line in FIG. 4b, the locking members 65 and 66 rotate as shown by the solid line in FIG. The locking member 65 is at the same angle as the guide hole 67, the locking member 66 is at a different angle from the guide hole 67, and when the ignition operating member 1 returns to the extinguishing position, it is at the same angle as the guide hole 67, as shown by the broken line. The angles of the locking members 65 are different, and the angles of the locking members 66 are the same.

In this way, the locking members 65 and 66 are provided so as to rotate together with the ignition operating member 1, and are provided at different angles to each other, so that in the extinguishing state, the firepower adjustment operating section B has the guide plate 62 attached to the locking member 65. It is locked and prevented from moving toward the minimum firepower position, and ignition is always performed at the maximum firepower state. Furthermore, when the fire power adjustment operation part B is moved to the right in this state, the locking member 66 is fitted into the guide hole 67 and becomes connected to each other in the direction of rotation, so that the ignition operation member 1 is locked and rotated. This prevents the fire from being inadvertently ignited by a child or the like due to the fire becoming immobile and unable to be pushed down. on the other hand,
In the ignition state, the lock member 65 and the guide hole 67 are at the same angle, and the firepower adjustment operation part B is connected to the lock member 6.
It can move freely in the direction of the minimum firepower position without being blocked by the locking member 66, and it will not be locked because it does not fit into the locking member 66.

Next, the operation of the ignition/extinguishing operation section A will be explained with reference to FIG. 5 and the following drawings. Note that these drawings only show parts related to the ignition operating member 1, and in order to avoid complicating the drawings, the springs 51,
52 and 55 are omitted. Figure 5 shows the standby state;
In other words, FIG. 6 shows the extinguished state, and FIG.
The figure shows the state in which the ignition operating member 1 is pushed down the most, and FIG. 8 shows the state in which the ignition operating member 1 is held at the ignition position after the ignition operation is completed.
In the standby state, the main valve opening/closing button 7 and the pilot valve opening/closing button 8 are kept in a protruding state by built-in springs, and the main valve and pilot valve of the gas tank main body 6 are closed.

When the ignition operation starts and the ignition operation member 1 begins to rotate, the engagement pin 44 is first pushed by the cam portion 29 of the second cam 22, the intermediate lever 42 rotates, and the pilot is released via the return spring 55. The lever 43 is also pushed and rotated, and the pilot valve open/close button 8
is pressed to open the pilot valve. on the other hand,
The igniter 11 is activated in response to the rotation of the support shaft 5 to ignite a pilot burner (not shown), and then the ignition lever 47 is pushed by the edge 31a of the cam portion 31 of the second cam 22. Then, the main valve open/close button 7 is pressed to open the main valve and ignite the main burner (not shown). As the second cam 22 further rotates, the engagement pin 44 comes into sliding contact with the edge 29a as shown in FIG. 6, and the intermediate lever 42 is maintained in a rotating state.

When the ignition operating member 1 is subsequently pushed to the state shown in FIG. 7, the sliding contact position of the engagement pin 44 moves from the edge 29a of the second cam 22 to the edge 26a of the first cam 21, and Since the diameter of the edge 26a is set to be slightly smaller than that of the edge 29a, the intermediate lever 42 returns slightly counterclockwise, but the button 8 remains pressed, and the ignition lever 47 moves toward the edge 31a.
The button 7 is also kept in a pressed state by sliding in contact with the button 7. At this position, the locking portion 57a of the locking spring 57 engages with the locking groove 32 of the second cam 22, and the second cam 22 is locked.

This completes the ignition operation, so ignition operation member 1
When you stop pressing , the first cam 21 engages the engaging claw 2.
The second cam 22 is rotated clockwise by the return spring 51 to a position regulated by the notched groove 30 of the second cam 22 with which the second cam 7 is engaged, resulting in the state shown in FIG. In this state, the cam portion 26 of the first cam 21 has the engagement pin 44 at the edge 2.
Since the intermediate lever 42 is shaped so as to move from the notch 6a to the notch 26b, the intermediate lever 42 further rotates counterclockwise, and the pressing force of the return spring 55 becomes smaller than the return force of the pilot valve opening/closing button 8. , the pilot lever 43 also rotates clockwise to close the pilot valve and turn off the pilot burner. By appropriately selecting the position of the notch 26b, the rotation angle at which the ignition operating member 1 returns from the state shown in FIG. 7 to the state shown in FIG. 8 is reduced, and the state shown in FIG. The angle θ can be made considerably large, and it becomes easy to visually confirm that the ignition state is ignited.

When extinguishing a fire, all you have to do is push down the fire extinguishing operation member 2, and the fire extinguishing cam 23 rotates to release the convex cam part 34.
pushes up the locking portion 57a of the lock spring 57, the lock of the second cam 22 is released, and the second cam 22 is returned together with the first cam 21 by the return spring 52, returning to the state shown in FIG. 5, and the main valve is also closed. It will be closed. At this time, the notch 29b of the second cam 22
The engagement pin 44 is pushed by the notch 29c on the opposite side, and the intermediate lever 42 is rotated once in a large counterclockwise direction.
9 and return to the notch 29b side. As described above, this fire extinguishing operation automatically moves the fire power adjustment member 3 to the maximum fire power position.

Note that in the embodiment described above, the lock member 6
5, 66 and the guide hole 67 are D-shaped, but these shapes may be other non-circular shapes that cannot be rotated with respect to each other when the lock member is inserted. 65, 66 and the guide hole 67 may be provided not coaxially with the guide shaft 5a but at different positions. In addition, each cam 21, 22
etc. are U-shaped, but they may have other shapes, and the intermediate lever 42 and the pilot lever 43 may be integrally formed using a spring material.

As is clear from the description of the embodiments above, the present invention provides first and second locking members whose postures change in conjunction with the operation of the ignition/extinguishing operation section, and the first locking member is capable of controlling the firepower in the extinguishing state. The second lock member is locked to the adjustment operation part to prevent its movement in the direction of the minimum fire power position, and when the second lock member is connected to the fire power adjustment operation part in the extinguished state, the ignition extinguishing operation of the ignition extinguishing operation part is prevented. This has the advantage that a complicated mechanism such as a link mechanism is unnecessary and the fire power adjustment operation section and the ignition/extinguishing operation section can be reliably locked with a simple structure.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway schematic plan view, Fig. 2 is a schematic side view, Fig. 3 a, b, and c are perspective views of each cam, and Fig. 4
Figures a, b, and c are - lines and - lines in Figure 1, respectively.
5 to 8 are explanatory views of the operation at the time of ignition operation. 1...Ignition operation member, 2...Extinguishing operation member, 3
...Firepower adjustment member, 5...Support shaft, 5a...Guide shaft, 6...Gas cock body, 7...Main valve opening/closing button, 8...Pilot valve opening/closing button,
23... Fire extinguishing cam, 51, 52, 53... Return spring, 62... Guide plate, 65... First locking member, 66... Second locking member, 67... Guide hole, A... Point Fire extinguishing operation section, B... Fire power adjustment operation section.

Claims (1)

[Scope of Claims] 1. A locking device for an operating part in a gas appliance configured such that the fire power adjustment operating part returns to the maximum fire power position in the extinguished state in conjunction with the extinguishing operation of the one-point extinguishing operating part, the locking device comprising: By changing the posture according to the operation of the fire extinguishing operation part, it locks on the fire power adjustment operation part in the extinguishing state, making it impossible to move the fire power adjustment part in the direction of the minimum fire power position, and in the ignition state, the fire power adjustment part is locked. The first locking member allows the fire power adjustment operation part to move in the direction of the minimum fire power position without being locked to the operation part, and the position changes according to the operation of the ignition extinguishing operation part, so that the fire power is adjusted only in the extinguished state. A second locking member that can be connected to the adjustment operation section and disables the ignition operation of the ignition/extinguishing operation section when connected to the firepower adjustment operation section. locking device.