JPH02154918A - Pressing operation device for gas appliance - Google Patents

Abstract

PURPOSE:To enable a solenoid safety valve to be reliably attracted and opened, and to enable an operating rode to be reliably operated by forming an idle groove, which further extends toward the front side or toward the rear side of the pressing direction of the operating rode from a groove position corresponding to a terminal end position, in a cam groove, and by regulating a position with respect to the pressing operation of the operating rode at the terminal end position where the member to be attracted of the solenoid safety valve is allowed to abut against an electromagnet. CONSTITUTION:When an operating rode 7 is operated in order of a starting end position A, a terminal end position B, an intermediate position C and a disengagement position, and is then returned to the starting end position A, an engaging member 15 that moves relatively with respect to a guide member 14, is so designed as to move in a cam groove 13 in order of a groove position 'a', a groove position 'b', a groove position 'c' and a groove position 'd', and then to be returned to the groove position 'a'. The operating rode 7 to which a returning force is given by a returning spring 7a due to the abutment of the engaging member 15 against the groove wall of the groove position 'c', is allowed to engage at the intermediate position C. The pressing operation of the operating rode 7 is restrained by the abutment of the engaging member 15 against the groove wall of the groove position 'd' to inhibit the further pressing operation, and the operating rode 7 is returned to the groove position 'a' by releasing the pressing operation.

Description

[Detailed description of the invention] The present invention relates to a press operation device for gas appliances.

2. Description of the Related Art As a conventional operating device for igniting gas appliances, one that opens and closes a closing member by rotating an operating element is known.

On the other hand, it is also known that an electromagnetic safety valve is installed in the gas supply path to the burner to shut off the gas if the burner goes out due to wind blowing or boiling over. This electromagnetic safety valve is opened manually and is held open using a weak electric power, such as the output from a thermal lightning pair facing the flame of a burner, so an electromagnet is used to hold the valve open. It is necessary to bring it into contact with the

The operations for opening and closing the above-mentioned closure (rotating operation) and the operation for opening the electromagnetic safety valve (pressing operation) are different, and in order to do this with one operator, for example,
It required a complicated mechanism as seen in Publication No. 83.

In addition, for example, when looking at gas appliances such as gas stoves and gas water heaters used in the kitchen, it is common for hands to get wet with water while cooking.
Pressing operation is preferable to rotating operation as the operation of the operator.

As a push operation device that satisfies this demand, we have adopted a so-called push-push mechanism that uses a heart-shaped cam groove and an engager that engages with the cam groove to return the operating rod to the fixed frame from the starting position against the spring force. It is provided in the terminal position so that it can be pressed freely, and the return operation of the operating rod from the pressing terminal position is locked at an intermediate position, and the locking at the intermediate position is released by the second pressing operation to the unlocking position. and return the operating lever to the starting position, and by pressing the operating lever to the terminal position, the shutoff valve is opened to supply gas to the burner, and the igniter is operated to ignite the burner. , upon returning to the intermediate position, the ignition operation is stopped with the shut-off valve open to allow steady combustion of the burner, and upon pressing again from the intermediate position, the operating rod is returned to the starting position and the shut-off valve is closed. One possibility is to make the burner extinguish.

This push-push mechanism is configured to move one of the fixed frame and the operating rod from a groove position corresponding to the start end position to the end position, the intermediate position, and the unlocking position through groove positions corresponding to each other. A guide member is provided with a cam groove that returns to a groove position corresponding to the starting end position, and an engager that is elastically inserted into the cam groove is provided on the other side, and the engagement between the guide member and the engagement element as the operating rod is operated is provided. The engaging element moves within the cam groove by relative movement with the engaging element, and the movement of the operating rod is guided. According to this, the operating rod moves through the engagement between the guide groove and the engaging element. Entrance and exit operations are guided.

Therefore, when installing an electromagnetic safety device to prevent the release of gas due to a misfire etc. to a gas appliance that employs such a push-push operation device, a push button is required to make the electromagnetic safety valve's adsorbent come into contact with the electromagnet and attract it. The force direction and the operating direction of the operating rod are the same, making it mechanically simple.

However, if the above-mentioned method is simply adopted, even though the operating rod has reached the final position, the attracting body of the electromagnetic safety valve may not yet come into contact with the electromagnet, and the electromagnetic safety valve may not be opened or closed by attraction.

It is an object of the present invention to provide a device that eliminates such a case, and the cam groove has an idle groove that extends further back in the pressing direction of the operating rod from the groove position corresponding to the terminal position. The electronic safety valve is characterized in that the position of the operating rod is restricted to the pressing operation at the terminal position where the absorbing body of the electronic safety valve is brought into contact with the electromagnet.

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

In Fig. 1, (1) shows a gas control unit in which an electromagnetic safety valve (2), a cutoff valve (3), and a gas governor (4) are assembled in series. ) are arranged coaxially in front and behind each other, so that the rear end of the valve rod (5) of the shutoff valve (3) faces the safety valve (2), and a fixed frame is attached to the front end of the unit (1). (6), insert the operating lever (D) facing the front end of the valve lever (5) into the fixed frame (6) so as to be slidable in the front and rear direction, and insert the operating lever (D) at the front end of the operating lever (7) into the fixed frame (6). Press the push button (9) attached to the front panel (8) of the gas appliance.
) is brought into elastic contact with the spring (9a), and thus the operating rod (n
from the starting end position A indicated by the solid line, whose position is regulated by the contact of the push button (9) with the front panel (8), to the rear end position B via the push button (9), as shown in FIG. 6, for example. Like <10
It can be freely suppressed against the return spring (7a) by about mm,
Furthermore, the operating rod (1) is equipped with a push-push mechanism (described later).
After assembling the IG, the return operation of the operating rod (D) from the end position B to the start end position A is stopped at an intermediate position C, approximately 5.5a+m from the start end position A, and the return operation from the intermediate position C is stopped. If this is pushed to an unlocking position of about 1.5 m from the intermediate position C before the end position B by a pressing operation, the locking at the intermediate position C will be released and the operating rod (7 ) is returned to the starting position A.

According to the suppression operation of the operating rod (7) from the starting end position A to the starting end position B, the operating rod (7) is first moved at point A in FIG.
) comes into contact with the valve rod (5) and the shutoff valve (3) begins to open, and then at four points beyond the intermediate position C, the electromagnetic safety valve (2) is pushed open via the valve rod (5). The ignition switch Gt provided on the fixed frame (6) is pushed by the cam protrusion (+21) on the operating rod (7) to close the ignition switch Gt at the point C near the end position B, and the ignition switch Gt is closed by the cam projection (+21) on the operating rod (7). is ignited, and by continuing to press it, the pressure is released at the end position B, where the adsorbent 2a of the electromagnetic safety valve (2) is in contact with the electromagnet 2b, and the operating lever (D) returns to the intermediate position C. According to
When the ignition switch av was opened, the pressure on the safety valve (2) was released, allowing steady combustion to be applied to the burner. In this case, the safety valve (2) is held open by suction by an output from a fire detection element such as a thermocouple facing the burner.

When extinguishing a fire, the operating rod (7) is pressed again from the intermediate position C to return it to the starting position A, and the shutoff valve (3) is closed to cut off the gas supply to the burner. In this case, the operating rod (n) is returned to the starting end position A from the unlocked position before it without being pushed again to the end position B, and the electromagnetic safety valve (2) and ignition switch AV, which should be operated only when igniting,
Unnecessary operation of the ignition operated member consisting of the ignition member is prevented from occurring.

As shown in FIGS. 2 to 5, the push-push mechanism (IG) includes a guide member a41 in which a cam groove 93 is formed on one side of the fixed frame (6) and the operating rod (7), and a guide member a41 on the other side. It is provided with an engager (ISI) that is elastically inserted into the cam groove (1). In the illustrated example, the guide member aΦ is fixed to the operating rod (D), and the engager (lS is attached to the U-shaped rod). Its tail end was pivotally supported on the fixed frame (6), and its tip was inserted into the cam groove 93 while being resiliently pushed toward the guide member 11Q by a leaf spring ae.

The cam groove 13 moves from groove position a corresponding to the starting end position A to groove position a through groove positions S, c, and d corresponding to the terminal end position B, intermediate position C, and unlocking position. The guide member a@
Due to the relative movement of the engager (ISl) to the cam groove ae
The inside is moved from groove position a in the order of groove position b1 groove position c1 groove position d so that it is returned to groove position a, and when the engager (+51) comes into contact with the groove wall (13a) at groove position C, the return spring (7a
) by the operating lever (D) is received and the operating lever (7
) is locked at the intermediate position C, and when the engager (+51) comes into contact with the groove wall 13b at the groove position d, the pressing operation of the operating rod (7) is restricted, and further pressing operation is not possible. When the operation is released, it returns to the groove position a.

As described above, at the groove position C and the groove position d among the turning points of the cam groove 13, the engaging member (1s) was made to come into contact with the groove walls 13a and 13b, but the operating rod ( 7) Idle groove 13 that extends further toward the back in the pressing direction
was formed.

Incidentally, the cam groove 0 is provided with several steps at each groove position to prevent the engager 09 from moving backwards, as shown in the fourth figure.
In this case, in the illustrated example, the groove depth from the plate surface (14a) of the guide member aΦ at groove position a and groove position d is, for example, 4II.
If the groove position is in the middle of ms, the groove position C is 3 am,
A step with a height of 1 m+* was formed in front of each groove position, but according to this, the operating rod (7a) by the return spring (7a)
) The difference in height between the deepest part and the shallowest part of the groove connecting groove position C and groove position C, where the engager a9 moves during the return operation of groove position A, and the groove connecting groove position d and groove position a, is the step difference. This is advantageous because it can reduce the influence of the sliding resistance of the engaging element (1) on the return operation of the operating lever (D).

In this case, the difference in height of the groove extending from groove position a to groove position 2 is relatively large, but this groove is not connected to the operating rod (7).
This is the part where the engaging element a9 is moved during the suppression operation, so there is no problem.

In the illustrated example, on the opposite side of the inserting direction of the engaging element (), the engaging element ('19) is brought into contact with the insertion shaft end (15a) of the engaging element (+51) from the plate surface (14a) of the guide member 0Φ. A stopper 0 is provided to prevent the engaging element (+5) from floating upward, so that the engaging element (+5) is not disengaged from the cam groove a3, and even if the operating rod (7) is strongly suppressed from the intermediate position C, the engaging element a9 The position of the operating rod (7) at the unlocked position is regulated without coming off the groove wall (13b) at the groove position d.

In addition, in the illustrated example, the stopper a force is applied to the engager ('19
It also serves as a mounting plate for the leaf spring qG that biases the plate spring qG in the insertion direction.
It is attached to the fixed frame (6) so that it is supported approximately horizontally at a position of approximately Floating has been suppressed.

In this way, according to the present invention, the engaging element is positioned in the idle groove at the terminal position where the attracting body of the electromagnetic safety valve of the operating rod comes into contact with the electromagnet, so that the electromagnetic safety valve is reliably opened by attracting. , it has the effect of reliable operation.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of an example of an ignition operating device to which the device of the present invention is applied, Fig. 2 is a perspective view of its main parts, Fig. 3 is a front view of the guide member, and Fig. 4 is an expanded view of the cam groove. FIG. 5 is a cutaway side view illustrating the arrangement of the engager and the stopper, and FIG. 6 is a diagram illustrating the operation of the operating lever. (2)...Solenoid safety valve (2a)...Adsorbent (2
b)...Electromagnet (3)...Shutoff valve (6)
...Fixed frame (7) ...Operation rod (7a)
...Return spring a...Push-push mechanism (3)...Cam groove (13')...Idle groove (
+4)... Guide member (Is)... Engagement procedure amendment form 1989/Mon.

Claims (1)

[Claims] The operating rod is provided in the fixed frame so that it can be pushed freely from the starting end position to the ending position against the return spring, and the return movement of the operating rod from the ending position to the starting end position is stopped at an intermediate position, and The second pressing operation from the intermediate position to the unlocking position releases the locking at the position, and the operating rod returns to the starting position, and pressing the operating rod to the terminal position releases the shutoff valve. and an electromagnetic safety valve to supply gas to the burner, and when the operating rod returns to the starting position, the shutoff valve is closed to stop the supply of gas to the burner. A press operation device for a gas appliance with a groove provided in one of the fixed frame and the operating rod, from a groove position corresponding to the starting end position, to the end position, to the intermediate position, and to the unlocking position. The push-push mechanism is constructed by providing a guide member having a cam groove that returns to a groove position corresponding to the starting end position through the groove position, and an engager that is elastically inserted into the cam groove on the other side. In the cam groove, an idle groove is formed in the cam groove to extend further inward in the pressing direction of the operating rod from the groove position corresponding to the terminal position, and the absorbing body of the electromagnetic safety valve is brought into contact with the electromagnet. A push operation device for a gas appliance, characterized in that the push operation of the operating rod is restricted in position at a terminal position.