JPH0159498B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push-button ignition device for use in gas appliances such as gas instantaneous water heaters and gas stoves.

Conventionally, an ignition operated member such as a heater switch and a pilot valve for ignition are actuated by pressing operation, as shown in Japanese Utility Model Publication No. 43-21740. An operating ring c equipped with an opening pilot spindle b is fixed by a spring d so as to be able to rise and fall freely, and a piston g having an inclined surface f is formed on the main spindle e which opens and closes the main valve, and a steel ball contacts the inclined surface f. j, a stepped hole h provided in the actuating ring c, and a push button k for integrally engaging or disengaging the inclined surface, the steel ball j, and the stepped hole h, and is raised and lowered together with the main spindle e. A push-button type ignition device is known in which a cylinder m having a recess l on its outer periphery is provided with a bullet n that engages or disengages.

However, the above-mentioned device has a problem in that it has a very large number of parts and its structure is complicated.

The object of the present invention is to obtain a device free of such defects, and the push rod can be freely pushed from the starting position to the intermediate position and then to the final position, and at the intermediate position, the gas supply path connected to the burner is connected. In a device in which the intervening on-off valve is opened and the ignition operated member to be operated at the time of ignition, such as the igniter, is actuated by a pressing operation from an intermediate position to a terminal position, the pushing operation lever and a fixed frame for slidably supporting the same, a guide plate having a guide portion constituting a push mechanism on one side and the other side, and an engager to be engaged with the guide portion, and a guide plate provided on the guide plate. A first guide part extends from point a corresponding to the starting position to point b corresponding to the terminal position, and a second guide part extends from point b towards point c corresponding to the intermediate position. a third guide part on the side of point b extending from point c toward point d corresponding to the unlocking position for releasing the lock at the intermediate position, and a fourth guide part extending from point d toward point a. The invention is characterized in that point d corresponding to the unlocked position is located closer to point a than the actuation position for actuating the ignition operated member.

Next, the present invention will be explained with reference to the illustrated embodiments.

FIG. 1 shows an embodiment in which the present invention is applied as an ignition device for a gas instantaneous water heater. A hydraulic response valve 7 is provided on the downstream side of the on-off valve 4 and is opened via a water governor 6 when water is supplied to the heat exchanger 1.
interposed therebetween, and a thermocouple 8 for controlling the safety valve 5 faces the side of the burner 2.
and an ignition burner 2b facing the igniter 9 are arranged in parallel, and the ignition burner 2a is connected through the ignition gas passage 3a, and the ignition burner 2b is connected through the ignition gas passage 3b and the ignition valve 10, respectively. It was connected to the downstream side of the on-off valve 4.

The ignition valve 10 is constituted by a spool valve having a small diameter portion formed at the rear end of the valve rod 4a of the on-off valve 4, and a push button 1 is provided at the rear coaxially with the valve rod 4a.
1 is provided so that the push operation rod 11 connected to the push button 11 can be freely pressed against the spring 11b from the starting end position A through the intermediate position C and back to the end position B. According to the pressing operation,
The valve rod 4a is pushed forward via the push rod 11a, the on-off valve 4 is opened to a predetermined opening degree at the intermediate position C, and the ignition is activated by pushing from the intermediate position C to the terminal position B. The valve 10 can be opened and the safety valve 5 can be pressed to open via a lever 12 that comes into contact with the tip of the valve rod 4a.

FIG. 6 shows an operating circuit for the safety valve 5 and the igniter 9, in which the igniter 9 is connected to the power supply battery 13 via the ignition switch 14, and the battery 13 and the safety valve 5 are connected via the changeover switch 15. Solenoid 5a
A capacitor 16 which can be switched and connected is provided in each switch, and the switches 14 and 15 are arranged so as to be interlocked with a pair of protrusions 14a and 15a on the push lever 11a, as shown in the third figure. Terminal position B of 11a
When the ignition switch 14 is pressed by the protrusion 14a, the ignition switch 14 is closed, the igniter 9 is activated, and the ignition burner 2a is activated via the ignition burner 2b.
ignition is applied to the protrusion 1, and the changeover switch 15 is already in the intermediate position C.
5a and is switched to the solenoid 5a side, and after igniting the pilot burner 2a, the solenoid 5
The safety valve 5 is held open by the discharge from the capacitor 16 until the thermocouple 8 connected to the thermocouple 8 is heated to a predetermined temperature.
And these valves 4, 5, 10 and switches 14, 1
5, as shown in FIG. 1, a guide plate 21 provided with a guide groove 22 as a guide portion on the push rod 11a integrated with the push button 11, and a fixed frame on the side that slidably supports the push rod 11a. a push mechanism 17 having one end provided at 18 and an engagement pin serving as an engagement element 19 having the other end engaged with the guide groove 22;
The push lever 11a is operated sequentially when the push lever 11a is pushed.

To explain this, the guide portion 22 has a first guide portion 22a extending rearward from a point a in front corresponding to a starting end position A to a point b corresponding to a terminal end position B, as shown in FIG. a second groove portion serving as a second guide portion 22b extending obliquely forward toward point a from point b toward point c corresponding to intermediate position C;
A third guide groove 2 extends from point c toward point b toward point d, which corresponds to the lock release position D diagonally rearward.
2c, and a fourth guide portion 22d extending forward from point d in a curved manner, and these guide portions 22
A, 22b, 22c, and 22d are each provided with a step as shown in FIG.
According to the pressing operation from to terminal position B, the engaging element 19 moves relative to the guide plate 21 from point a to point b along the first guide portion 22a, and the pressing at terminal position B is released. According to the above, the engaging element 19 is prevented from moving backward toward the first guide part 22a by the step at the end of the first guide part 22a, and is moved along the second guide part 22b to point c, and when the engagement element 19 is pushed The return movement of the operating rod 11a from the terminal position B by the return spring 11b is stopped by the movement of the engaging element 19 to the point c, and the pushing operating rod 11a is locked at the intermediate position C, and then the pushing operation is stopped. According to the pressing operation of the rod 11a from the intermediate position C, the engagement element 19 is prevented from moving backward to the second guide part 22b due to the step at the end of the second guide part 22b, and moves toward the third guide part 22c. The push rod 11a is moved to point d through the lock release position D, and the pushing movement of the push rod 11a is regulated at the corresponding release position D. When the push is released at the position D, the engager 19 is moved to the third guide. It is prevented from moving backward to the third guide part 22c by the step between it and the third guide part 22c, and is moved to point a along the fourth guide part 22d,
The push rod 11a is returned to the starting position A.

The valves 4, 5, 10 and switches 14, 1
For example, the exact operation timing of No. 5 is as shown in Fig. 7. Assuming that the pushing stroke from the starting end position A at the end position B is set to 8.5 mm and that at the intermediate position C to 4.5 mm, the pushing stroke from the end position A to the end position A is set to 8.5 mm. The on-off valve 4 begins to open at a point A of about 2 mm, discharge to the solenoid 5a starts by switching the changeover switch 15 at a point B of about 2.8 mm, and the electromagnetic safety valve 5 opens at a point C about 6 mm beyond the intermediate position C. begins to press open, 6.3mm
The ignition valve 10 is opened and the ignition switch 1 is turned on at two points.
4 is closed, and the operation of the igniter 9 is started by closing the igniter 9, and the igniter 9 as an operated member for ignition is pressed from the intermediate position C without causing the operation of the electromagnetic safety valve 5 and the ignition valve 10, for example. As shown in FIG. 7, the push button 11 is returned to the starting position A by pressing the button 11 from the intermediate position C to the unlocking position D by about 1 mm.

Incidentally, a push push mechanism in which the push lever is returned to its old position by pushing the push lever again is known in the art from Japanese Patent Publication No. 1767-1970, Publication No. 12334-1973, etc., and the push push mechanism of the present invention Although the mechanism is not different in principle from these mechanisms, the conventional mechanism locks the push lever to the locking position returned from the final push-in position, and then returns it from the lock position to the final push-in position. In contrast, in the present invention, the pressing operation is not performed from the intermediate position C to the terminal position B, and a slight pressing operation is performed to the unlocking position D just before the pressing operation. The difference is that the pushing rod 11a is returned to the starting end position A at the step .

Next, to explain the overall operation of the device of the present invention described above, first, when igniting, the push lever 11a
is pressed from the start end position A to the end position B. According to this, in addition to the on-off valve 4 as described above, the electromagnetic safety valve 5 and the ignition valve 10 are opened, and the pilot burner 2a and the ignition burner 2b are opened. When gas is supplied, the igniter 9 is operated by closing the ignition switch 14, and ignition is provided to the pilot burner 2a via the ignition burner 2b. After this ignition, the pressure on the push rod 11a is released, but when doing so, the push rod 11a is moved back to the intermediate position C and is locked at the position C. When the pushing rod 11a returns to the intermediate position C, the operation of the igniter 9 is stopped, the ignition valve 10 is closed, and the ignition burner 2b is extinguished, but the on-off valve 4 is not opened. The pilot burner 2a is maintained in this state and continues combustion, and the burner 2 is ignited when the hydraulic push valve 7 is opened during water flow.

By the way, when the pushing lever 11a returns to the intermediate position C, the electromagnetic safety valve 5 is released from the opening state via the Nova 12, but as described above, it remains open for a certain period of time due to the discharge of the capacitor 16. During this hold time, the thermocouple 8 facing the pilot burner 2a is heated to a predetermined temperature, and thereafter the safety valve 5 is held open by the electromotive force of the thermocouple 8.

In particular, since the point d corresponding to the unlocking position provided on the third guide portion 22c is located at the position where the ignition operated member is actuated, that is, on the side of the point a rearward from the two points, again The push rod 11a
When pressed, it returns to the starting position A without operating the ignition operated member. That is, when the push lever is pushed in the event of a misfire in the burner 2, the igniter 9 is not activated, and the safety valve 5 and ignition valve 10 are not opened, so that the igniter 9 cannot be ignited after an ignition error. Explosive ignition caused by the operation of is effectively prevented.

In addition, in the above embodiment, since it is applied to a gas appliance having an electromagnetic safety valve 5 as a misfire safety device, in addition to operating the igniter 9, the safety valve 5 is also pressed by pressing the push operation rod 11a to the terminal position B. Although the present invention is not limited to this, in the above-described embodiment, the ignition valve 10 is opened by pressing the end position B, and the igniter 9 is actuated to first open the pilot burner 2a. Although the present invention is described in which the flame is transferred to the burner 2 after being ignited, the present invention is similarly applicable to gas appliances such as gas stoves that do not have an pilot burner that directly ignites the burner 2 with the igniter 9 facing it.

In this way, according to the present invention, there is provided a guide plate provided with a guide portion constituting a push mechanism on one side and the other side of the push operation rod and a fixed frame that slidably supports it, and a guide plate provided with a guide portion constituting the push push mechanism, and A guide portion provided on the guide plate is provided with an engager to be engaged, and a guide portion provided on the guide plate,
a first guide portion extending from point a corresponding to the starting end position toward point b corresponding to the end position; a second guide portion extending toward point a from point b toward point c corresponding to the intermediate position; A third guide part on the side of point b extending from point d toward point d corresponding to the unlocking position for releasing the lock at an intermediate position, and a fourth guide part extending from point d toward point a. and a configuration in which point d corresponding to the unlocked position is located closer to point a than the actuation position for actuating the ignition operated member, that is, a guide portion provided on the guide plate and an engagement engaging therewith. With a very simple structure consisting of a comb, it is possible to open the on-off valve and operate the ignition operated member to maintain normal combustion after ignition by simply pressing and releasing the push lever. Done,
Moreover, when the fire is extinguished, or when an ignition error or misfire occurs, even if the push lever is pressed again, the opening/closing valve can be closed without operating the ignition operated member.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of one example of the device of the present invention, FIGS. 2 and 3 are cross-sectional views along the line and - of FIG. 1, respectively, and FIG. 4 is a guide on the guide plate constituting the push mechanism. Fig. 5 is a plan view of the groove, Fig. 5 is an expanded cross-sectional view thereof, Fig. 6 is a circuit diagram of the igniter and electromagnetic safety valve, Fig. 7 is a line diagram explaining the operation of the push button, Fig. 8
The figure is a longitudinal sectional view showing a conventional example. 2...burner, 3...gas supply path, 4...on/off valve, 9
...Igniter, 11...Push button, 17...Push push mechanism.

Claims (1)

[Claims] 1. The push lever can be pushed freely from the starting position to the intermediate position and then to the terminal position, and at the intermediate position, an on-off valve interposed in the gas supply path connected to the burner is opened, and the pushing lever is pressed from the intermediate position to the terminal position. In a device that operates an ignition operated member to be operated when igniting an igniter or other igniter, a push lever is provided on one side and the other of the push lever and a fixed frame that slidably supports the push lever. A guide plate provided with a guide part constituting a mechanism and an engager to be engaged with the guide part are provided, and the guide part provided on the guide plate is moved from a point a corresponding to a starting end position to a terminal end position. a first guide portion extending toward point b;
A second guide portion extends from point b toward point a toward point c, which corresponds to the intermediate position, and point b extends from point c toward point d, which corresponds to the unlocking position for releasing the lock at the intermediate position. a third guide part on the side, and a fourth guide part extending from point d toward point a, and the point d corresponding to the unlocked position is located from the operating position for operating the ignition operated member. A push-button ignition device characterized in that it is located on the point a side.