JP2525112Y2 - Ignition device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ignition device for a gas stove or other combustor.

(Prior Art) Conventionally, this type of device includes an operating member that can be pressed against a return spring, and a lock member that locks a return operation of the operating member by the return spring. Opening the shut-off valve interposed in the gas supply passage connected to the burner, closing the ignition switch for operating the ignition plug, and keeping the ignition switch open at the position where the operation member is locked by the lock member. When the operating member is pressed again to extinguish the fire, the ignition switch is not closed, and an ignition device that eliminates problems such as explosion ignition is provided. As shown in FIG. 19, this is engaged with a cylinder (g) which moves up and down together with an operation member (a) and has an engagement recess (f) on an outer peripheral surface, as shown in FIG. Or a detached ammunition (H), and the operating member (b) is locked at the pressing position by the engagement of the armature pawl (h) with the engaging concave portion (f). In this device, when the electromagnetic safety valve is to be pressed and opened with the pressing operation, the operating member (a) is hindered by the closing of the electromagnetic safety valve. It is difficult to retreat to a position where it is not necessary.

Therefore, there is provided an operating member capable of being pressed from a starting end position to an end position via an intermediate position against a return spring, and a lock member for locking the returning operation of the operating member by the return spring at the intermediate position, At the time of pressing operation from the starting end position of the member to the intermediate position, the shutoff valve interposed in the gas supply path connected to the burner is opened, and the electromagnetic safety valve is pressed and opened by pressing operation from the intermediate position to the end position, and The ignition switch that activates the ignition plug at the time of pressing operation from the position to the end position is closed, and the ignition switch is kept open at the intermediate position locked by the lock member of the operation member, and the shut-off valve is opened. There is also known a device using the lock member having a heart-shaped cam groove for holding the ignition switch. However, when the operation member is pushed again for extinguishing a fire, the ignition switch is used. There is a disadvantage that close again.

Therefore, as shown in Japanese Patent Application Laid-Open No. 60-103232, the locking member is, as shown in FIG. 17, one and the other of an operating member (a) and a fixed frame (b) slidably supporting the operating member (a). A guide plate (d) provided with a heart-shaped cam groove (c) constituting a push-push mechanism and a pin (e) engaged with the cam groove (c), and the heart-shaped cam groove (c) The shape of the first cam groove α extends from the point a corresponding to the start position to the point b corresponding to the end position, as shown in FIG.
A second cam groove β extending from the point b toward a point c corresponding to the intermediate position, and a point b extending from the point c toward a point d corresponding to an unlocking position for releasing the locking at the intermediate position. And a fourth cam groove δ extending from the point d toward the point a, and the point d corresponding to the unlocked position is shifted to the point a side from the operation position for closing the ignition switch. There is also known an arrangement in which the ignition switch is closed so that the ignition switch is not closed when the operating member (a) is pressed again by operating the operating member (a) again.

(Problems to be solved by the present invention) However, in this case, the pushing amount at the time of re-pressing operation is smaller than the pushing amount at the time of operating the operation member (a) first, which is strange to the operator. It gives a feeling and is strongly pushed when it is pushed again, so that the pin
It is a win that causes a problem such as bending when strongly hitting the cam groove γ wall.

An object of the present invention is to obtain an ignition device free of such a problem.

(Means for Solving the Problems) In order to achieve such an object, the present invention provides an operating member which can be pressed from a starting end position through an intermediate position to an end position against a return spring, and a return of the operating member. A lock member for locking a return operation by a spring at an intermediate position thereof, the lock member comprising a groove member having a heart-shaped cam groove, and a pin engaging with the cam groove; The first is to engage the pin when the operating member is moved from the start position to the end position.
A cam groove, a second cam groove with which a pin engages when shifting from the end position to the intermediate position, a third cam groove with which the pin engages when shifting from the intermediate position to the release position, and a start position from the release position A fourth cam groove with which a pin is engaged when shifting, wherein the ends of the first cam groove and the fourth cam groove extend substantially the same length in the shifting direction of the operating member; When the member is pressed, the end position and the release position of the operation member are set to the same position, and when the operation member is pressed from the start position to the intermediate position, the operation member is interposed in the gas supply path connected to the burner. The shutoff valve is opened, the electromagnetic safety valve is pressed and opened by the pressing operation from the intermediate position to the end position, and the ignition switch for operating the ignition plug at the time of the pressing operation from the start end position to the end position is closed by the operating element. Locked to the lock member of the operation member The shut-off valve is kept open at an intermediate position, and the operating member for closing the ignition switch is operated in conjunction with the pressing operation of the operating member from the start end position to the end position. The ignition switch is switched to an inoperative position where the pressing operation of the ignition switch cannot be performed in conjunction with the returning operation of the member from the end position to the intermediate position, and the operating element is switched to the ignition switch in association with the returning operation from the intermediate position to the starting position. A switching means for switching to an operating position where the user can operate the.

(Operation) In the present invention, the operating member is switched to the inoperative position where the ignition switch cannot be pressed by the switching means in conjunction with the return operation of the operating member from the end position to the intermediate position. The ignition switch is not operated unless it returns to the starting position, and the ignition plug does not operate when the operating member is pressed again from the intermediate position where the shut-off valve is open.

(Example) An example of the present invention will be described with reference to the attached drawings.

In the drawing, (1) is an operation member capable of being pressed from the start position A to the end position B against the return spring (2), and (3) is a return operation of the operation member (1) by the spring (2). FIG. 4 shows a lock member that is locked in the middle thereof, wherein the lock member (3) is
A groove member (3b) provided with a heart-shaped cam groove (3a) on the operating member (1) shown in FIGS. 4 and 5, and one end pivotally supported on the machine frame (4). And the other end is the cam groove (3a)
When the operating member (1) is pressed from the start position A to the end position B after the pressing operation is released as shown in FIG. 1, the pin (3c) Is locked at the bent portion Y of the cam groove (3a), and is locked at the intermediate position C of the return operation by the spring (2) of the operating member (1).

In this case, when the operation member (1) is pushed again, the lock at the intermediate position C is released and the operation member (1) returns to the start position A.

When the operation member (1) is pressed from the start position A to the end position B shown in FIG. 8, the cam groove (3a) engages with the pin (3c), as is apparent from FIG. 1 cam groove a
And the second cam groove b with which the pin (3c) is engaged when shifting from the end position B to the intermediate position C, and the pin (3c) when shifting from the intermediate position C to the release position D when performing the re-pressing operation. And a fourth cam groove d with which the pin (3c) engages when moving from the release position D to the start end position A. The first cam groove a and the fourth cam groove d Are configured to extend substantially the same length in the transition direction of the operation member (1). When the operation member (1) is pressed, the eighth operation is performed.
As shown in the figure, the end position B and the release position D of the operation member (1) are set to be the same position. The first cam groove a
, The second cam groove b, the third cam groove c, and the fourth cam groove d have portions shared with each other.

In FIG. 1, (5a) and (5b) show an electromagnetic safety valve and a shutoff valve provided in a gas passage (6) connected to a burner (not shown), and the shutoff valve (5b) is provided for the operation member (1). The shut-off valve (5b) is provided on the valve rod (7) opposed to the distal end, and when the operating member (1) is pressed from the start position A to the end position B as shown in FIG. The electromagnetic safety valve (5a) is pushed open at a position beyond the intermediate position C until the electromagnetic safety valve (5a) faces the burner until the electromotive force of the thermoelectric element is generated. This is forcibly held by the discharge charge of the capacitor. When the operating member (1) is pushed in for a predetermined length, the operating member (1) is stopped by, for example, an electromagnetic safety valve (5a).

(31) indicates a switch interposed in the operation circuit for forcibly holding the electromagnetic safety valve (5a), and (8) indicates an ignition switch interposed in the operation circuit of the ignition plug facing the burner.

The configuration so far is no different from the conventionally known one. According to the present invention, the operating member (10) for closing the ignition switch (8) in conjunction with the pressing operation of the operating member (1) from the start position A to the end position B is operated by the operating member (1). ), The ignition switch (8) is switched to an inoperative position where the pressing operation cannot be performed in conjunction with the return operation from the end position B to the intermediate position C, and in conjunction with the return operation from the intermediate position C to the start position A. A switching means (11) for switching the operation element (10) to an operation position where the ignition switch (8) can be operated is provided. The one shown in FIGS. 1 to 12 is a pin as the operation element (10). Is switched to an inoperative position in which the ignition switch (8) cannot be depressed in conjunction with the return operation of the operating member (1) to the intermediate position C, and the return operation from the intermediate position C to the start position A is performed. An operating position where the operator (10) can operate the ignition switch (8) in conjunction with it. Comprises switching means (11) for switching.

More specifically, as shown in FIG. 6, the switching means (11) makes the operating member (1) pivotally support the root,
A swinging piece (13) provided so as to be able to retreat when abutting on a swinging cam (16) to be described later; a triangular cam (14) provided at the tip of the swinging piece (13); The root is pivotally supported by the machine frame (4) so as to be close to 1), and the tip (16a) is moved when the triangular cam (14) moves with the pressing operation of the operating member (1). The triangular cam (1) comprises a swing cam (16) resiliently spring-loaded by a spring (15) so as to protrude into the locus.
4) is configured to include a slope (14a) inclined with respect to the moving direction of the operating member (1) and a side surface (14b) orthogonal to the moving direction of the operating member (1).

As described above, the swinging piece (13) is supported by the operating member (1) when the shaft (12) is in contact with the swinging cam (16).
Press spring (12b) interposed between a) and the operation member (1)
Was supported so as to be able to retract. In the drawing, (17) indicates a cam for closing the switch (31) via the actuator (31a), and the cam (17) is provided integrally with the operation member (1). The operation of this embodiment will be described with reference to FIGS.
This will be described with reference to FIG.

When the operating member (1) is pressed from the start position A to the end position B, first, before the intermediate position C, the triangular cam (14) pushes the swing cam (16) by the side surface (14b),
As shown in FIG. 10, the tip (16a) of the oscillating cam (16) is retracted from within the movement trajectory of the triangular cam (14), and then the cam plate (9) is turned on by the operator (10). 8), the ignition switch (8) is closed, and the switch (31) is closed by the cam (17).

Accordingly, spark discharge is obtained in the spark plug, the forced hold circuit is activated, and then the shutoff valve (5b) is pressed and opened.

When the operation member (1) is further pressed, the engagement between the swing cam (16) and the triangular cam (14) is released as shown in FIG. (15), it returns to its original position, and the tip (16a) of the swing cam (16) faces the slope (14a) of the triangular cam (14).
Thereafter, the above-described electromagnetic safety valve (5a) is pushed by the operating member (1) to open, whereby fuel gas is supplied to the burner to ignite. At this time, the pin (3
c) falls into the second groove b of the heart-shaped cam groove (3a). This indicates that the operating member (1) can be locked at the intermediate position C by the lock member (3) when the pressing of the operating member (1) is released.

Next, when the pressing operation of the operating member (1) is released at the end position B, the operating member (1) retreats by the return spring (2). The slope (14a) of the triangular cam (14) hits the swing cam (16),
In this state, the triangular cam (14) moves to the start end position A side together with the operating member (1), so that the triangular cam (14) and thus the swinging piece (13) swing and move on the swing cam (16). The pin as the operating element (10) provided on the rocking piece (13) retreats to the inoperative position as shown in FIG. Is disengaged. Accordingly, the cam plate (9) is repelled by the spring (9c) and pivots away from the ignition switch (8), the actuator (8a) is released from the pressure and the ignition switch (8) is opened to open the ignition plug. Becomes inoperative, and thereafter the operating member (1) is locked at the intermediate position C by the lock member (3). More specifically, after opening the ignition switch (8), the intermediate position C
Therefore, there is no inconvenience that the ignition plug operates even after the transition to the normal combustion.

When the pressing is released after the re-pressing operation, the locking at the intermediate position C is released, and the operating member (1) returns to the start position A. In the process, first, the shut-off valve (5b) is turned off. After being closed and further moved, the triangular cam (14) is disengaged from the swing cam (16), and the swinging piece (13) swings back to its original position. (13) Therefore, the pin as the operating element (10) returns to the position where the ignition switch (8) can be operated, that is, the operating position shown in FIG.

In FIG. 1, (18) is a spring for pressing the shut-off valve (5b) to the valve closing side, (19) is a valve housing constituting the gas passage (6), (2)
0) is a gas inlet provided in the valve housing (19), (21) is a gas outlet connected to a main burner (not shown), and (22) is a gas outlet connected to a normal fire burner (not shown).

13 to 16 show another embodiment. In this embodiment, the switching means (11) is supported on the operating member (1) by a shaft (24), and A cam plate (23) provided so as to rotate counterclockwise by a spring (25), a root portion is supported by the machine frame (4), and a stopper (2) is provided by a spring (27).
6) and a locking piece (28) that is resiliently pushed to the side that comes into contact with the operating member (1) when the operating member (1) returns from the end position B to the intermediate position C. A hook (28a) engaging with (26) is provided.

On the left side of the cam plate (23), there is provided a cam surface (23a) as an operator (10) for pressing the actuator (8a) of the ignition switch (8).

(29) receives the upper end of the cam plate (23) just before the operating member (1) is released from the locking at the intermediate position C and returns to the start position A, and the cam plate (23) is spring-loaded (25). (3) A receiving piece provided on the machine frame (4) for returning to the initial state against
Reference numeral 0) denotes a spring for urging the stopper (26) in the counterclockwise direction, that is, the side engaging with the cam plate (23).

The operation according to this embodiment will be described.
Is pressed from the start end position A to the end position B, the cam plate (23) is engaged with the stopper (26), and the ignition switch (8) is engaged with the cam surface (23a) constituting the operation element (10). )
The actuator (8a) moves in the pressing direction of the operating member (1) while maintaining the operating position where the actuator (8a) can be operated. Accordingly, the ignition switch (8) is closed by the actuator (8a) being pushed by the cam surface (23a) as the operating element (10), and the stopper (26) is stopped at the end position B as shown in FIG. Engage with the hook (28a) of (28), and then the operating member (1)
When the pressing operation is released, the engagement of the cam plate (23) by the stopper (26) is released just before returning to the intermediate position C, and the cam surface (23a) as the operation element (10) is turned on by the ignition switch (8). )
It is kept in the inoperative position as shown in FIG. Therefore, the actuator (8
The pressing of a) is released, the ignition switch (8) is opened, and the operating member (1) is locked at the intermediate position C. Then, according to the re-pressing operation and the pressing release of the operation member (1), the locking at the intermediate position C is released, and the operation member (1) returns to the starting position A.
When the engagement between the stopper (26) and the locking piece (28) is released and the operating member (1) returns to the start position A, the machine frame (4)
The rear end of the cam plate (23) comes into contact with the receiving piece (29) provided on the cam plate (23), and the cam plate (23) returns to the initial state, and the stopper (26)
And returns to the operating position where the ignition switch (8) can be operated by the operation member (10) shown in FIG.

In the drawing, reference numeral (33) denotes a blocking piece that prevents the stopper (26) from rotating more than a certain amount in the counterclockwise direction.

(Effect of the Invention) As described above, according to the present invention, the operation member for closing the ignition switch is returned from the end position of the operation member to the intermediate position in conjunction with the pressing operation of the operation member from the start position to the end position. A switching means for switching the ignition switch to an inoperative position where the ignition switch cannot be pressed in conjunction with the operation, and switching the operation element to an operation position where the ignition switch can be operated in conjunction with a return operation from the intermediate position to the start position. Since the operating member is switched to the inoperative position where the ignition switch cannot be pressed by the switching means in conjunction with the return operation of the operating member from the end position to the intermediate position by the switching means, the operating member is temporarily moved to the start position. The ignition switch is not operated unless the operation is returned to the normal position, and when the operation member is pushed again from the intermediate position in which the shut-off valve is open, the ignition plug is operated. The ignition switch can be prevented from being operated at the time of the re-pressing operation without using a deformed heart cam for the lock device as in the conventional example, and the problem associated with using the deformed heart for the lock device can be solved. Has the effect.

[Brief description of the drawings]

FIG. 1 is a cutaway front view showing one embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a front view of a main part, FIG. 4 is a right side view excluding a part thereof, FIG. FIG. 6 is an enlarged view of a groove member, FIG. 6 is an exploded perspective view of a main part, FIG. 7 is a perspective view of a swinging piece, FIG. 8 is an explanatory view showing an operation sequence thereof, and FIGS. FIG. 13 is a partial front view showing another embodiment, FIG. 14 to FIG. 16 are operating state diagrams thereof, and FIG. 17 is a sectional side view of a main part of a conventional example. FIG. 18 is an enlarged view of a heart cam groove, and FIG. 19 is a sectional side view showing another conventional example. (1) Operating member (2) Return spring (3) Lock member (5a) Electromagnetic safety valve (5b) Shutoff valve (6) Gas passage (7) Valve rod ( 8) Ignition switch (10) Operator (11) Switching means

Claims (1)

(57) [Scope of request for utility model registration] An operating member which can be pressed from a start position to an end position via an intermediate position against a return spring, and a lock member which locks a return operation of the operating member by the return spring at the intermediate position. The lock member includes a groove member having a heart-shaped cam groove, and a pin engaging with the cam groove. The cam groove is engaged with the pin when the operating member is moved from the start position to the end position. A first cam groove to be engaged with, and a second cam groove to which a pin is engaged when shifting from the end position to the intermediate position;
A third cam groove in which the pin engages when shifting from the intermediate position to the release position; and a fourth cam groove in which the pin engages when shifting from the release position to the start end position. The end of the groove is configured to extend substantially the same length in the moving direction of the operating member, and when the operating member is pressed, the terminal position and the release position of the operating member are the same position, When the operation member is pressed from the starting end position to the intermediate position, the shutoff valve interposed in the gas supply passage connected to the burner is opened, and the electromagnetic safety valve is pressed and opened by the pressing operation from the intermediate position to the end position. An ignition switch for activating an ignition plug at the time of pressing operation from the start end position to the end position is closed by an operator, and the shut-off valve is held in an open state at an intermediate position locked by a lock member of the operation member. The operation The operation switch for closing the ignition switch in conjunction with the pressing operation of the member from the starting end position to the end position cannot be operated by pressing the ignition switch in conjunction with the returning operation of the operating member from the end position to the intermediate position. An ignition device, comprising: switching means for switching to an operating position and switching the operating element to an operating position where the ignition switch can be operated in conjunction with a return operation from the intermediate position to the start position.