JPS60207831A - Push-button type operating device of burner - Google Patents

Abstract

PURPOSE:To facilitate the re-ignition operation by a constitution wherein a push button is returned to its start location when the depressing operation of the push button is released by the starting of the actuation of an igniter. CONSTITUTION:A locking device 10 to stop the push button 8 of a burner at the intermediate location C is equipped with a cam mechanism 18, which detects the depressed location of the push button 8 so as to actuate the locking action only when the push button 8 is depressed further beyond the predetermined ignition location D near the final location B. If the push button 8 is not depressed from the start location A of the push button 8 to the ignition location D or the location in order for an engaging piece 21 to travel beyond the step 19d at the end of a groove part 19a, the engaging piece 21 comes back to a point (a) by reversing its motion in the first groove 19a. Only when the push button 8 is depressed beyond the ignition location D, the locking device 10 is put into actuation. Because an igniter 12 is started its actuation before the ignition location D is reached, when the depressing operation of the push button 8 is released due to the start of the actuation of the igniter 12, the push button 8 returns to the start location A without being stopped at the intermediate location C.

Description

[Detailed description of the invention] The present invention relates to a push-button operating device for a combustor.

Conventionally, this type of device includes a push button that can be pressed freely against a return spring, and a locking device that operates to lock the return movement of the push button from the end position to the start end position at an intermediate position. Pushing the push button beyond the intermediate position to an end position activates the igniter to ignite the burner unit, and returning the push button to the intermediate position deactivates the igniter and ignites the burner unit. A device that provides a steady combustion operation is known, but in this case, the locking device is designed to lock the push button at the intermediate position when the push button is pushed beyond the intermediate position for the subsequent return operation. This configuration is generally configured and has the following disadvantages.

In other words, if you are not familiar with the operation, you may assume that the ignition operation is complete when the spark sound is generated when the igniter starts operating.
The push button may be released even though the burner unit is not actually ignited, and in this case, the push button is beyond the intermediate position, so the locking device prevents it from being engaged at the intermediate position. When the stop operation is applied and the burner unit is noticed not to be ignited and is to be turned on again, the lock device is released and the push button is returned to the starting position while being suppressed. It is necessary and the operation is troublesome.

In addition, the applicant of the present application previously proposed a locking device in Japanese Patent Application No. 59-275 as an improved device for this type of push-button operating device.
A cam mechanism is incorporated that detects the pressed position of the push button and activates the locking device only when the push button is pushed to a predetermined ignition position near the end position, and the pressing operation is released without pressing the push button all the way. At that time, we proposed a method in which the push button was returned to the starting position without being locked in the intermediate position, but in consideration of manufacturing errors, etc., this push button was designed to have some margin before the end position. Generally, the ignition position is set, and when the push button is pushed beyond the ignition position, the igniter is activated, and at the end position, an electromagnetic safety valve, etc. is completely pressed open to ignite the burner unit. Even in this case, if the push button is released immediately after the igniter starts operating, the push button is past the ignition position, so the locking device locks it at an intermediate position, preventing the re-ignition operation. This comes with the inconvenience of being troublesome.

In order to solve this inconvenience, the present invention, in the above-mentioned Hikari proposal, starts the operation of the igniter before the ignition position, and when the push button is released when the igniter starts operation, It is an object of the present invention to provide a device in which a push button is returned to a starting position without being locked in an intermediate position.

Referring to FIG. 1, (1) indicates a burner unit having a main burner (1a) and an ignition burner (1b), and (2) indicates a gas control unit. an electromagnetic safety valve (held open by the electromotive force of a thermocouple (4), which is a flame detection element, interposed in a gas passage (3) leading to the main burner (1a) and facing the main burner (1a); 5), a manual shutoff valve (6), and a large point gas passageway (3a) connected to the ignition burner (1b) branched from the downstream side of the shutoff valve (6) of the gas passageway (3). ), a large point valve (force is provided), and a push button (8) is provided in front of the gas control unit (2), and the push button (8) connects the button rod (8a) connected to the gas control unit (2). Valve rod (9) inserted into the control unit (2)
), these valves (51(6)) are opened and closed by force.

To explain this in detail, the push button (8) is provided so as to be freely pressed from the starting end position A to the rear end position B against the return spring (8b), and furthermore, the push button (8) is provided at the end position B. i1
A locking device (101, which will be described in detail later), operates to prevent the return operation by the return spring (8b) from [from to the starting end position A to being locked at intermediate position 0, and a fire extinguisher, which will be described in detail later, to release the operation of the locking device OQ. A button αυ is provided, and after the push button (8) is pushed to the terminal position B, it is locked at the intermediate position wO, and returned to the starting position A by operating the fire extinguishing button αυ. According to the pushing operation from the starting end position A of 8), the shutoff valve (6) is first opened at the intermediate position 0, and then the electromagnetic safety valve (5) is opened by pushing from the intermediate position O to the end position B.
An ignition switch is provided with a push valve opening and a force opening of the ignition valve, and an igniter O3 facing the ignition burner (1b) is interlocked with a protrusion (8C) on the button rod (8a). The main burner (1a) is energized by the switching operation on the 0th floor, and the main burner (1a) is given spark ignition via the ignition burner (1b);
Next, when the press button (8) is released and returned to the intermediate position 0, the shutoff valve (6) is maintained in the open state, but the igniter Q2 is inactivated and the igniter is turned off. valve(
The ignition burner (1b) is extinguished by closing the valve, and the pressure of the electromagnetic safety valve (5) is released and the main burner (1a) is extinguished.
) is given a steady combustion operation, and then the fire extinguishing button θυ is operated to return the push button (8) to the starting position A, the shutoff valve (6) is closed and the main burner (1a) The fire was extinguished.

The electromagnetic safety valve (5) is forcibly held in the open state by the discharge from the capacitor θa shown in FIG. 5 until a predetermined electromotive force is generated from the thermocouple (4) after the pressure is released. To explain this in detail, there is a hold switch Q! which is switched by being pushed by a protrusion (8d) on the button rod (8a) at an intermediate position of the push button (8). i1, and by switching the hold switch (IF5 to the a contact side in the intermediate position), a discharge circuit is closed that causes the discharge current from the capacitor a4 to flow through the solenoid (5a) of the electromagnetic safety valve (5), and the push button After returning to the intermediate position 0 of (8), the electromagnetic safety valve (5) is attracted and held in the open state by the discharge from the capacitor 0 and the electromotive force from the thermocouple (4); Furthermore, in the illustrated example, the capacitor (+4) is connected to the solenoid (
5a) closes a charging circuit connected to the power source ae via
A charging current is passed through the solenoid (5a) with the opposite polarity to that of the thermocouple (4), and when the push button (8) returns to the starting position, the electromagnetic current is immediately turned off without waiting for the thermocouple (4) to cool down. The safety valve (5) was closed.

In addition, in the illustrated example, the ignition switch 0th floor is the push button (8
) is switched from the a contact to the b contact by returning to the intermediate position 0, thereby inactivating the igniter 0a and closing the sub-discharge circuit of the capacitor a4. The electromagnetic safety valve (
The forced hold time in 5) can now be set appropriately.

The lock device ell is a cam mechanism that detects the pressed position of the push button (8) and operates the lock device (1G) only when the push button (8) is pushed beyond a predetermined ignition position near the terminal position B. 08, and to explain this in more detail, the lock device 00 has a cam groove 01 constituting the cam mechanism (+8) in the button rod (8a), as shown in FIGS. 1 and 2, for example. Attach the formed cam plate (21) and attach the machine frame (c)
The engaging element Cυ, which is swingably attached to the cam groove σ, is elastically inserted and locked into the cam groove σ by means of a spring. Stepped-shaped first to third grooves (19a
) (19b) and (19o), and when the push button (8) is pushed from the start end position A to the end position B, the engagement element Cυ moves relative to the cam plate. The engaging element Qυ is moved from point A to four points via the first groove (19a), and then the return spring (8) of the push button (8) is moved.
According to the return operation from the end position B according to b), the engager (2υ) is at the step (19d) at the end of the first groove (19a).
), it is prevented from moving backward toward the first groove (19a) and is moved to point C via the second groove (19b), and at the point F, it is connected to the step (19θ) at the starting end of the sixth groove (19c). The push button (8) was then locked at the intermediate position 0.

Here, when the push button (8) is pressed from the starting end position A, the push button (8) is moved by the engager shaft υ into the first groove portion (19a).
), that is, to the ignition position, the engagement element +21 will be removed during the return operation.
) moves backward through the first groove (19a) and returns to point A, and the push button (8) is not locked at the intermediate position 0. In other words, the push button (8) is not locked by the cam groove (1'l). 8) is detected and the locking device OQ will be activated only when it is pushed beyond the ignition position.

The fire extinguishing button αυ is arranged side by side with the push button (8) as shown in FIGS. Unlock lever (
) is the protrusion (1) on the button rod (11a) leading to the fire extinguishing button αυ
1b) through the bottle (24a) to the engager (211
spring (24b) in the direction of pulling up from the cam groove α9.
The engaging element Cυ is slid against the step (19e).
The button is moved to the fifth groove (19c), and the push button (
8) locking at intermediate position 0, that is, the locking device (IC
When the operation of J is released, the push button (8) is returned to the starting position A.

The configuration of each part has been explained above, and according to the present invention, the operation of the igniter 0z is started from before the above-mentioned ignition position by pushing the push button (8) beyond the intermediate position 0. That is, the ignition switch α line is switched to the a contact side before the ignition position to operate the igniter 0z.

In this case, the electromagnetic safety valve (5) is pressed to open at the same time as the igniter 02 starts operating, or after this, and when the electromagnetic safety valve (5) starts to open, the igniter α2 is always in an activated state to prevent release of raw gas.

Next, to explain the operation, if you are not familiar with the operation, you may think that the ignition operation is complete when the spark sound is generated by the start of operation of the igniter α, and release the push button (8) halfway. However, according to the present invention, since the igniter 02 starts operating before the ignition position, when the push button (8) is released at the start of its operation, the locking device α@ is not activated. First, the push button (8) returns to the starting position A without being locked at the intermediate position 0, and when you realize that the fire is not lit and try to relight it, the locking device OQ must be activated as in the conventional case. There is no need to release the push button (8) and return it to the starting position A, which facilitates the re-ignition operation.

In addition, in the above embodiment, the lock device M00 is composed of a cam plate (to) with a cam groove (1!J) and an engager atυ, but it is not limited to this. The button (Il+) is used to release the operation of the locking device 0ω and return the push button (8) to the starting position A. It is also possible to return the push button (8) to the starting position A by pressing it twice.
This is composed of a cam plate (1) and a retainer 01) in the same way as above, and the cam groove 0 formed on the cam plate is shaped like a deformed heart as shown in the sixth figure, and the step is formed as shown in the seventh figure. I attached it.

Here, when operating the push button (8) from starting end position A → ending position B → intermediate position O, the engaging element Qυ is moved from point A → first groove part (19a) → four points → second groove part (19b) in the same way as above. ) → point C, and then when pressing again from intermediate position 0, the retainer CD moves from point C → second point → fifth groove part (19c)
The push button (8) is returned to point A along the route shown in FIG. , the operation of the igniter (121) is started between the ignition position p and the push-in position E from the intermediate position 0 corresponding to the two points.

Thus, according to the invention, the locking device is actuated to lock the push button in the intermediate position only when the push button is pushed beyond the ignition position near the end position;
The igniter is designed to start operating before this ignition position, and if you make a mistake such as releasing the push button when the igniter starts operating, the push button will not be locked at the intermediate position and will return to the starting end. It has the effect of being returned to its original position and facilitating the re-ignition operation.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway plan view of one example of the device of the present invention, Fig. 2 is a perspective view of its main parts, Fig. 3 is a front view of a cam plate constituting the locking device, and Fig. 4 is a diagram of the cam plate. FIG. 5 is an electric circuit diagram, FIG. 6 is a front view of a modified example of the cam plate, and FIG. 7 is a cross-sectional view of the cam plate along the cam groove. be. (11... Burner unit (8)... Push button (8b)
Return spring Q Applicant Rin Sui 2 people other than Co., Ltd.

Claims (1)

[Claims] A push button is provided that can be pressed freely against a return spring, and a locking device is provided that operates to lock the return operation of the push button from the push end position to the start end position at an intermediate position. Pushing the push button to the end position activates the igniter to ignite the burner unit, and returning the push button to the intermediate position deactivates the igniter to provide steady combustion operation of the burner unit. A push-button operating device for a combustor, the lock device detecting the pushed position of the push button and only when the push button is pushed beyond a predetermined ignition position near the terminal position. A push-button type combustor incorporating a cam mechanism for operating a locking device, characterized in that pushing the push button past an intermediate position causes the igniter to start operating from before the ignition position.