JPH0260936B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an ignition operating device for gas appliances.

The applicant of the present invention has previously developed an ignition operating device for gas appliances, including a first operating rod b that can be pressed from a starting position to an intermediate position and then to a terminal position against a return spring a, as shown in FIG. 1, for example. The igniter and other ignition devices are provided with a locking device c that locks the first operating rod b at an intermediate position when the pressure on the first operating rod b is released, and a second operating rod d that releases the operation of the locking device c. The operating member and the shutoff valve are pushed by the first operating rod b, and when the first operating rod b is pushed to a terminal position beyond the intermediate position, the ignition operated member is actuated and the ignition operated member is moved to the intermediate position. We have proposed a system in which this is released upon return, and when the first operating rod b is pressed to the terminal position, the shutoff valve is pushed open before the intermediate position, and held in that state at the intermediate position. However, this locking device c
is provided with a lock piece f that engages with the rear end of the protrusion e on the first operating rod b, and is biased toward the protrusion e by a spring g, so that the first operating rod b goes beyond the intermediate position. Generally, the lock piece f is configured to face the rear end of the protrusion e when pressed. According to this, the pressing operation can be performed without pressing the first operating rod b to the terminal position. Even if it is released, if it is beyond the intermediate position, the lock piece f will engage with the rear end of the protrusion e, and the first operating rod b will be locked at the intermediate position, eventually causing the ignition operated member to operate. The shutoff valve may be held open even though the ignition operation is not performed, and if the operated member for ignition is an igniter, ignition will not be performed, and there is a concern that raw gas will be released from the burner. When the operated member for ignition is a safety valve, there is an inconvenience that the first operating rod b is locked in an intermediate position even though the safety valve is not open, and remains in a state as if it were in the ignition operating state.

The object of the present invention is to obtain a device free from such inconveniences, which is a gas appliance comprising an operated member for ignition and a shutoff valve interposed in a gas passage, which resists a return spring. a first operating rod that can be pressed and operated from a starting position to an intermediate position and then to a terminal position; a locking device that locks the first operating rod at an intermediate position when the first operating rod is released from pressure and returns to the starting position with a spring; and a second operating lever for releasing the locking of the first operating lever by the locking device, and when the first operating lever is pressed from the starting end position to the ending position, the shutoff valve is pushed open before the intermediate position, The ignition operated member is actuated by pressing the first operating rod beyond the intermediate position toward the terminal position, and released by returning to the intermediate position, and when the first operating rod is locked at the intermediate position, the shutoff valve is activated. an engaging element in which the locking device is provided on either one of the first operating rod side and a fixed member supporting the first operating rod; and a cam body provided with a cam groove that is engaged with the engaging element provided on the other side, and the cam groove is a first operating rod that guides the engaging element when pushing the first operating rod from the starting end position to the final end position. The second cam groove is composed of a first cam groove and a second cam groove that guides the engager and locks the engager at the end point when the first operating rod is released from pressure at its end position. is branched from the end point of the first cam groove, and the branched portion is provided with means for preventing return to the first cam groove, and the end point of the second cam groove is set as the intermediate position.

The present invention will be explained with reference to embodiments shown in FIG. 2 and below. In Fig. 2, 1 is a burner unit having a main gas burner 1a and an ignition burner 1b, and 2 is a gas control unit.
, an electromagnetic safety valve 4 in series with this, and an ignition burner 1
These valves 3,
4 and 5 are opened and closed by a common operating lever 6, and a fixed lever 7 is fixed to the front end of the unit 2. The operating rod 8 is slidably inserted in the front-rear direction, the front end push button 8a is attached to the first operating rod 8, and the first operating rod 8 is returned from the terminal position A to the rear terminal end against the spring 8b. A lock device 9, which will be described in detail later, is operable to press the first operating rod 8 to position B, and further operates to lock the return operation of the first operating rod 8 from the terminal position B to the starting position A by a return spring 8b at an intermediate position C. , and a second operating lever 10, which will be described later after releasing the operation of the locking device 9, are provided, and the first operating lever 8 is locked in the intermediate position C after being pushed to the terminal position B.
The second operating rod 10 is operated to return to the starting position A.

According to the pressing operation of the first operating rod 8 from the starting end position A, the shutoff valve 3 is first opened via the operating rod 6 before the intermediate position C, and then from the intermediate position C to the terminal position B. The pushing motion causes the safety valve 4 to be pressed open and the ignition valve 5 to open, and the ignition switch 11 provided on the fixed frame 7 is pushed against the protrusion 8c on the first operating rod 8. turned on,
The igniter 12 facing the ignition burner 1b is activated so that the main burner 1a is given a flame transfer via the ignition burner 1b, and then the pressing operation of the first operating rod 8 is released. When the shutoff valve 3 is returned to the starting end position A side, the shutoff valve 3 is held open at the intermediate position C where it is locked by the locking device 9, but the ignition switch 11 and the ignition valve 5 are The igniter 12 is switched between the off state and the valve closed state.
becomes inoperative, the ignition burner 1b is extinguished, and the pressure on the safety valve 4 is released. At this time, steady combustion continues in the main burner 1a. Next, when the second operating lever 10 is operated to release the first operating lever 8 from the locking device 9, the first operating lever 8 returns to the starting position A, and the shutoff valve 3 is closed. The valve was turned on so that the main burner 1a was extinguished.

During steady combustion, the safety valve 4 is kept open by an output from a thermocouple or other flame detection element (not shown) facing the main burner 1a.

As is clear from the above description, in the illustrated embodiment, the ignition operated members to be operated by pressing the first operating rod 8 beyond the intermediate position C to the terminal position B are the electromagnetic safety valve 4 and the ignition valve. 5. Ignition switch 1
However, if the ignition burner 1b is omitted so that direct ignition can be given to the main burner 1a, the ignition valve 5 is not necessary, and the electromagnetic safety valve 4 can also be omitted.

In any case, even though the operated member for ignition is not operated for safety reasons or other reasons, the first operating rod 8
It is undesirable for the ignition operated member to remain in the operating state with the ignition member being locked in the intermediate position C.

Therefore, in the present invention, the locking device 9 is
A cam body comprising an engaging element 16 provided on either one of the operating rod 8 side and the fixed member side supporting the first operating rod 8, and a cam groove 14 in which the engaging element 16 provided on the other side engages. 15, and the cam groove 14 has a first cam groove 14a that guides the engager 16 when pushing the first operating rod 8 from the starting end position to the final end position.
and a second cam groove 14b that guides the engager 16 and locks the engager 16 at the end point when the first operating rod 8 is released from its terminal position B. The cam groove 14b branches from the end point of the first cam groove 14a, and a step 14d is provided at the branched portion as means for preventing return to the first cam groove, and furthermore, the end point of the second cam groove 14b is set at the intermediate position C. As a result, the first operating rod 8 is not locked at the intermediate position C unless the first operating rod 8 is pushed to the terminal position B.

To explain this in more detail, the cam body 15 is attached to the first operating rod 8, and the engager 16, which is swingably attached to the fixed rod 7, is moved into the cam groove by a spring 17.
The cam body 15 is elastically inserted and locked into the cam body 15.
The second cam groove 1 is opened by the second operating rod 10 mentioned above.
It further includes a third cam groove 14c that guides the engaging element 16 to the starting end position A when the engaging element 16 is disengaged from the end point of the engaging element 4b.

To further explain this, each cam groove 14a to 1
4c is formed in a loop shape connecting the points A, B, and C corresponding to each operation position A, B, and C of the first operating rod 8, and extends from the starting end position A to the ending position B of the first operating rod 8.
According to the pressing operation, the engaging element 16 is moved from point A to point B via the first cam groove 14a by the relative movement of the engaging element 16 with respect to the cam body 15,
Then, when the first operating rod 8 is returned from the terminal position B by the return spring 8b, the engaging element 16 is moved to the first position by the step 14d at the terminal end of the first cam groove 14a.
It is prevented from moving backward toward the cam groove 14a and is moved to point C via the first cam groove 14b. Here, the groove depth at point C is the second and third cam grooves 14b, 1 before and after this.
The engaging element 1 is formed deeper than 4c.
According to the movement of No. 6 to the point C, this is the third cam groove 1.
4c side, and the spring force of the return spring 8b is received by the engagement element 16, so that the first operating rod 8 is locked at the intermediate position C.

Therefore, when the first operating rod 8 is pressed from the starting end position A, the engaging element 16 is pushed into the first cam groove 14a.
If the engaging element 16 is not moved to a position beyond the step 14d at the end point, during the return operation, the engaging element 16 moves backward along the first cam groove 14a and returns to point A, and the first operating rod 8 is locked at the intermediate position C. I can't.

The second operating rod 10 is arranged side by side with the first operating rod 8, as shown in FIGS. 2 and 3, and is operated by a push button 10a at the front end against a return spring 10b to lock the rear lock. It can be pressed freely to the release position,
According to the pressing operation, the lock release rod 18 engaged with the engaging element 16 of the locking device 9 is moved to the second position.
The engaging element 16 is slid by the protrusion 10c on the operating rod 10 through the pin 18a against the spring 18b in the direction of pulling up the engaging element 16 from the cam groove 14.
6 climbs over the step 14e and enters the third cam groove 14.
c, the locking of the first operating rod 8 at the intermediate position C, that is, the operation of the locking device 9 is released, and the first
The operating rod 8 is returned to the starting position A by a return spring 8b.

As described above, according to the present invention, the locking device includes an engaging element provided on either one of the first operating rod side and a fixed member side supporting the first operating rod, and the engaging element provided on the other side. a cam body with a cam groove that engages with the first cam groove, which guides the engager when pushing the first operating rod from the starting end position to the final end position; A second cam groove guides the engaging element and locks the engaging element at the end point when the operating rod is released from pressure at its terminal position, and the second cam groove is located at the terminal point of the first cam groove. At the same time, the branch part is provided with means for preventing return to the first cam groove, and the end point of the second cam groove is set to the intermediate position, so that the first operating rod cannot be pushed from the starting position to the final position. The first operating rod will not be locked in the intermediate position unless the operated member for ignition is operated, that is, the first operating rod will not be locked in the intermediate position unless the operated member for ignition is operated. This has the effect of easily resolving the problem of the previously proposed method in which the rod is locked in an intermediate position.

[Brief explanation of drawings]

Fig. 1 is a cutaway plan view of the ignition operating device according to the earlier proposal, Fig. 2 is a partially cutaway plan view of an example of the device of the present invention, Fig. 3 is a perspective view of the main part, 4
The figure is a front view of the cam body of the locking device, and FIG. 5 is a developed cross-sectional view thereof. 3...Shutoff valve, 4...Electromagnetic safety valve, 5...Ignition valve ignition operated member, 11...Ignition switch, 8...First
Operating rod, 9... Lock device, 10... Second operating lever, 1
4...Cam body, 14a...First cam groove, 14b...Second
Cam groove, 14d...blocking means, 16...engaging element.

Claims (1)

[Claims] 1. A gas appliance comprising an ignition operated member and a shutoff valve interposed in a gas passage, and a first operating rod that can be pressed from a starting position to an intermediate position and then to a terminal position against a return spring; a locking device for releasing the pressure on the first operating rod and locking the first operating rod at an intermediate position when returning to the starting position side by a spring; and a second operating rod for releasing the locking of the first operating rod by the locking device. When the first operating rod is pressed from the starting end position to the ending position, the shutoff valve is pushed open before the intermediate position,
The ignition operated member is actuated by pressing the first operating rod beyond the intermediate position toward the terminal position, and released by returning to the intermediate position, and when the first operating rod is locked at the intermediate position, the shutoff valve is activated. an engaging element in which the locking device is provided on either one of the first operating rod side and a fixed member supporting the first operating rod; and a cam body provided with a cam groove that is engaged with the engaging element provided on the other side, and the cam groove is a first operating rod that guides the engaging element when pushing the first operating rod from the starting end position to the final end position. The second cam groove is composed of a first cam groove and a second cam groove that guides the engager and locks the engager at the end point when the first operating rod is released from pressure at its end position. is branched from the end point of the first cam groove, and the branched portion is provided with means for preventing return to the first cam groove, and the end point of the second cam groove is set at the intermediate position.