JPH11257666A - Cock device for gas heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a cock from opening inadvertently by an infant, and open a thermo valve with always fixed force at use. SOLUTION: This cock device is provided with a cock body 20 which has an inflow port 22 on one end side in axial direction, and an outflow port 23 at the other end side in axial direction sandwiching a valve port 21 inbetween, and further provided with a thermo valve 25 which opens and closes the valve port 21 from the side of the outflow port 22, a cock valve 31 which rotates to open and close the outflow port 23, a push bar 32 for pressing which shifts in axial direction on the other end side in axial direction of the cock body 20, cam mechanisms 37, 38, and 39 which shift the push bar 32 in the direction of one end in axial direction at rotation of the cock shaft 36 for rotating the cock valve 31, a pusher 33 which is projected and energized in the direction of the thermo valve 25 by an elastic body 33b to one end in axial direction of the push bar 32, and a rotary lock device which checks the rotation of the cock shaft 36 in its initial stage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stove cock device for supplying or stopping fuel gas to a gas stove.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional technique. In FIG. 7, reference numeral 1 denotes a cylindrical cock body. The cock body 1 has a valve port 2 narrowed to a small diameter at an intermediate portion in the axial direction, and an inlet 3 on the right side with the valve port 2 interposed therebetween.
Has an outlet 4 on the left side. A thermo-valve 5 is accommodated in the right end of the cock body 1, and the thermo-valve 5
The valve body 6 is moved left and right to open and close the valve port 2 from the right. The thermo valve 5 urges the metal valve rod 7 supporting the valve element 6 to the left from the cylinder 8 by the elastic force of the valve closing spring 9. The valve body 6 is moved to the left by force to close the valve port 4, and a magnetic force is generated in the cylinder 8 by an electromotive force generated when the thermocouple is heated by the flame of the gas stove. The opening operation of the valve body 6 is held by sucking and holding the valve rod 7 moved to the position.

A cock valve 10 that rotates about the axis of the cock body 1 and opens and closes the outlet 4 is fitted to the left side of the cock body 1. A push rod 12 for pressing the body 6 from the left side is fitted so as to be movable left and right (axially). The cock body 1
A cock shaft 13 is attached to the left axial portion so as to be movable left and right (axial direction) and rotatable about the axis of the cock body 1. A large-diameter central shaft 14 is attached to the right end of the cock shaft 13. Fix it. The center shaft 14 is connected to the cock valve 10 so as to be able to move left and right and not to rotate relatively. Reference numeral 15 denotes a push rod return spring that urges the push rod 12 to the left, and reference numeral 16 denotes a center return spring that urges the center shaft 14 to the left. In addition, at the left end of the cock shaft 13,
An operation knob (not shown) is attached.

When supplying gas, the cock shaft 13 is moved to the right, the valve element 6 is moved to the right via the push rod 12, the valve port 2 is opened, and then the cock shaft 13 is opened. Is rotated in the opening direction, and the cock valve 10 is opened via the central shaft 14 to open the outlet 4. Then
Gas for fuel flows through the inflow port 3, the valve port 2, and the outflow port 4, is supplied to the gas stove, and is ignited by an ignition device (not shown). Due to the generation of the electromotive force due to the ignition, a magnetic force is generated in the electromagnet of the thermo valve 5, and the opening operation of the valve body 6 is maintained. Thus, even if the cock shaft 13 and the push rod 12 move to the left and return, the supply of gas to the gas stove is continued. Further, when the gas stove is extinguished due to boiling over, etc., the electromagnet of the thermo valve 5 loses magnetic force due to the disappearance of the electromotive force, and the valve 6 is closed by the elastic force of the valve closing spring 9 so that the gas to the gas stove is closed. The supply is stopped. Also, when the cock valve 10 is closed, the valve body 6 is similarly closed.

[0005]

In the prior art, when the valve port 2 is opened, the cock shaft 13 is manually pushed rightward, and the valve body 6 is moved rightward through the push rod 12 (opening). Actuation), when the cock shaft 13 is strongly pressed, the valve closing spring 9 is over-compressed and deformed,
There is a disadvantage that normal operation is hindered by close contact.
In addition, since the cock shaft 13 was rotatable at the initial stage when the cock shaft 13 returned to the left, when the cock shaft 13 was inadvertently rotated, the cock valve could be opened to cause gas leakage.

Further, during the ignition by opening the cock shaft 13 (pushing it to the right and rotating it), the force for pushing the cock shaft 13 is weakened and the valve body 6 moves slightly toward the valve port 2. In this case, the valve rod 7 is separated from the electromagnet in the cylinder 8 and the valve rod 7 is not attracted by the magnetic force generated by the electromagnet. In this state, when the cock shaft 13 is moved to the left and returned, the valve In some cases, the body 6 was closed by the elastic force of the valve closing spring 9, and the gas stove was extinguished unexpectedly. An object of the present invention is to provide a new gas cooker cock device that has solved the above-mentioned disadvantages.

[0007]

Means for Solving the Problems The present invention has the following configuration to achieve the above object. That is,
The invention according to claim 1 is a cylindrical cock body having a valve port formed at an intermediate portion in the axial direction, an inflow port formed at one axial end of the valve port, and an outflow port formed at the other axial side. A thermo valve that moves in the axial direction from the inflow port side to open and close the valve port, a cock valve that rotates around the axis of the cock body to open and close the outflow port, On the other end in the axial direction, a push rod that moves to one end in the axial direction and presses the thermo valve in the opening direction, and a cock shaft that rotates the cock valve are provided, between the cock shaft and the push rod. A cam mechanism for moving the push rod in one axial direction at the time of rotation of the cock shaft, and a pusher protruded and biased in the thermo valve direction by an elastic body at one axial end of the push rod. It was done. In the invention of claim 2, the cock shaft is provided so as to be movable in the axial direction, and when the cock shaft moves to one axial end side where the cam mechanism operates, further movement in the axial one end direction is performed. A regulating body is provided for regulating, and a rotation lock device for preventing rotation of the cockshaft when the cockshaft returns to the other axial direction and the initial rotational position is provided. The invention of claim 3 is:
After the cock shaft is moved to one axial end where the cam mechanism operates, when the cock shaft is rotated in the opening direction of the cock valve, the return of the cock shaft to the other axial end is braked. The return braking unit is provided.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is an explanatory sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a principal part for the explanation, FIG. 3 is a partial sectional view of a regulating body according to the present invention, and FIG. 5 and 6 are explanatory diagrams of the operation of the present invention.

In FIG. 1 and FIG. 2, reference numeral 20 denotes a cock body formed of an aluminum alloy in a cylindrical shape. The cock body 20 has a valve opening 21 narrowed to a small diameter at an axially intermediate portion. Inlet 2 on the right side of mouth 21
2 has an outlet 23 on the left side. A thermo-valve 25 is accommodated in the right end of the cock body 20, and the valve body 26 of the thermo-valve 25 is moved in the left-right direction to open and close the valve port 21 from the right. The thermo valve 25 is provided with the valve body 2
6 is urged to project leftward from the cylinder 28 by the elastic force of the valve closing spring 29,
Normally, the valve body 26 is moved to the left by the elastic force of the valve closing spring 29 to close the valve port 4, and the cylinder 2 is moved by the electromotive force generated when the thermocouple is heated by the flame of the gas stove.
A magnetic force is generated in the valve 8, and the valve rod 27 moved to the right is attracted and held by the magnetic force to hold the opening operation of the valve element 26.

A cock valve 31 that rotates about the axis of the cock body 20 and opens and closes the outlet 23 is fitted to the left side of the cock body 20. 31a is a valve hole formed in the peripheral wall of the cock valve 31. A push rod 32 is fitted to the axial center of the cock valve 31 so as to be movable left and right (axially), and is urged to move leftward by a return spring 34. At the right end of the push rod 32, a shaft portion 32a (FIG. 2) narrowed to a small diameter is formed, and a plastic pressing element 33 is fitted to the shaft portion 32a so as to be slidable left and right, and the pressing element 33 is pressed. Spring 33
It is urged to the right by b. The pressing element 33 is formed in a cylindrical shape having a stepped small-diameter engaging portion 33a at the left end, and the left peripheral wall is divided in a circumferential direction by a slit to form the large diameter engaging portion 33a. The push rod 32 is slidably fitted and locked to the shaft 32a of the push rod 32 from the right side.

A cock shaft 36 is mounted on the left side of the cock body 20 so as to be movable left and right (axially) and rotatable about the axis of the cock body 20. The right end of the cock shaft 36 is fitted to the left end shaft center of the cock body 20, and the cam pin 37 is fixed to the right end by protruding in the radial direction. The left end of the cock body 20 is closed by a mounting plate 35, and a cylindrical regulating body (center shaft) 41 with a flange is mounted on the inner surface (right surface) side of the mounting plate 35 so as to be rotatable and axially immovable. 41 bearings 4
At 1a, the right end of the cock shaft 36 is rotatably supported.

As shown in FIGS. 3 and 4, the restricting body 41 has a flange 41b which is bent outward in the radial direction at the left end of the bearing 41a, and is provided at two circumferential positions of the flange 41b. The locking piece 42 is formed so as to protrude outward in the radial direction, and the locking piece 42 is engaged with the locking groove 24 (FIG. 2) formed on the left end surface of the cock body 20 and having a substantially semicircular shape in the circumferential direction. By stopping, the regulation body 41 is made rotatable and immovable in the axial direction. Further, a restricting hole 43 elongated in the left-right direction is formed in the bearing portion 41a, and the base of the cam pin 37 described above is fitted in the restricting hole 43 so as to be slidable in the left-right direction. regulate.

As shown in FIG. 4, the right end of the restriction hole 43 is bent upward, that is, the cock shaft 36 is bent in the rotation direction in which the cock valve 31 opens, and the corner is formed on an inclined surface 43a having an obtuse angle. I do. This slope 43a is
The cam pin 37, and thus the cock shaft 36, forms a return braking portion that brakes the return to the left, and the inclination angle α is about 30 degrees. Also, a fork-shaped locking claw 44 projecting rightward is formed integrally with the bearing portion 41a of the regulating body 41, and the locking claw 44 is formed on the cock valve 31 in the left-right direction. It is slidably engaged with the groove 31b (FIG. 2).

A cup-shaped cock cam 38 is fitted to the left part of the cock body 20 so as to be movable left and right (axially) and non-rotatably, and the left end of the aforementioned push rod 32 is brought into contact with the bottom wall of the cock cam 38. Let it. The above-described bearing portion 41a of the regulating body 41 and the cam pin 37 are accommodated in the cock cam 38, and the cam surface 39 displaced in the axial (left / right) direction as it goes in the circumferential direction on the inner peripheral portion of the inner surface of the bottom wall of the cock cam 38.
To form The cock cam 38 and the cock valve 31
A cock spring 45 is pre-compressed and interposed therebetween, and the cock cam 38 is moved and urged to the left by the cock spring 45 to bring its cam surface 39 into contact with the tip of the cam pin 37 described above.

Thus, when the cock shaft 36 is rotated, the cam pin 37 slides along the cam surface 39 to move the cock cam 38 in the left and right direction, and the cock cam 38 moves the push rod 32 in the left and right direction. The valve body 26 is opened via the pressing element 33 when the valve body 26 moves rightward. In this case, the amount of movement of the pressing element 33 relatively moving in the left-right (axial) direction on the push rod 32 depends on the cam surface 39.
Is slightly larger than the axial displacement 15 of the push rod 32 when the push rod 32 moves to the right through the cam surface 39.
The engaging portion 33a of the pressing element 33 causes a predetermined gap L to be generated with respect to the right end of the shaft portion 32a of the push rod 32. The gap L is for absorbing a manufacturing error of the cam surface 39, the push rod 32, and the like, or an assembly error. In addition,
The cam pin 37, the cock cam 38, and the cam surface 39 form a cam mechanism referred to in the present application.

A rotation lock device 50 is provided to prevent the cock shaft 36 from rotating when the cock shaft 36 returns to the left and initial rotation positions. As shown in FIG. 1, the rotation locking device 50 fits a rotation stopper plate 51 supported by the mounting plate 35 to an intermediate portion in the left-right direction of the cock shaft 36, and An engagement hole 51a is opened at a predetermined location. On the other hand, the engaging plate 52 is fitted to the cock shaft 36 at a position located on the right side of the rotation stopping plate 51 so as to be relatively non-rotatable, and the engaging claw 52a is detachable from the engaging hole 51a. To form The engagement plate 52 is provided with a spring 53 pressing leftward.
And the stopper ring 5 attached to the cock shaft 36
3, the axial position is set to a predetermined position. An operation knob (not shown) is attached to the left end of the cock shaft 36.

FIGS. 5 and 6 are explanatory views of the operation of the cock valve 31, the regulating body 41, the cam device 50 and the like when the cock shaft 36 is operated. First, cock shaft 3
When the valve 6 has returned to the left and the initial rotation position, the valve hole 31a of the cock valve 31 is, as shown in (a1) of FIG.
The outlet 23 is closed. The cam pin 37 is shown in FIG.
As shown in (c1) and (e1), it is located at the base (left end in FIG. 2) of the restriction hole 43 and is separated from the valley 39a of the cam surface 39.

In this state, when the cock shaft 36 is pushed rightward, the cam pin 37 is moved to (c2) in FIG.
As shown in (a2), it is located at the tip (right end in FIG. 2) of the restriction hole 43 and abuts the valley 39a of the cam surface 39. When the cock shaft 36 starts rotating in the opening direction in this state, the cam pin 37
As shown in 3), after being located on the slope 43a at the tip of the regulation hole 43, the cam surface is rotated while the cock valve 31 is rotated ((e3) in FIG. 5) via the regulation body 41 and the regulation body 41. 3
Sliding along the slope 9 ((a3, d3) in FIG. 5), the cock cam 38 starts to be pushed rightward in FIG. Thereby, the push rod 32 starts to move rightward in FIG.

When the cock shaft 36 is rotated to the maximum in the opening direction, the cam pin 37 reaches the peak 39b of the cam surface 39 as shown in FIG. And the push rod 32 is moved to the right maximum through the cock cam 38. As a result, the valve body 26 is pressed rightward via the pressing spring 33b and the pressing element 33 to open the valve port 21. On the other hand, the cock valve 31 is rotated maximally in the opening direction via the regulating body 41, and the valve hole 31a matches the outlet 23, and the outlet 2
3 is fully opened ((e4) in FIG. 6). Thereby, the gas for fuel flows from the outlet 23 to the gas stove, and the gas stove can be ignited. The cock shaft 3
When the lock 6 is rotated to the maximum in the opening direction, the locking piece 42 of the restricting body 41 collides with the end of the locking groove 24 formed in the cock body 20, and further rotation in the opening direction is restricted. ((D4) in FIG. 6).

When the cock shaft 36 is rotated in the opening direction, the cam pin 37 is located on the slope 43a of the regulating hole 43 as shown in FIG. 6 (c4). Since the leftward movement of the cockshaft 36 is braked by the frictional resistance of the slope 43a, in particular, when the cockshaft 36 is rotated to the maximum and the cockshaft 36 is pushed rightward during ignition of the gas stove, Even if the cock shaft 36 is lowered, the cock shaft 36 is not accidentally moved to the left by the reaction force of the cock spring 45. Therefore, during the ignition, the presser 33 stably presses the valve body 26 rightward, and the valve rod 27
Is stably brought into contact (approach) with an electromagnet (not shown) of the cylinder 28. When a magnetic force is generated in the electromagnet in the cylinder 28 by the electromotive force of the thermocouple at the time of the ignition, the valve rod 27 is securely connected. Suction and holding, valve body 26
To prevent the misfire by maintaining the open operation of.

When the cock shaft 36 is released from being pressed to the right after the ignition, the cock shaft 36
6 is moved and returned mainly by the reaction force of the cock spring 45, and the cam pin 37 moves to the left in FIG. 2 against the frictional resistance of the slope 43a of the regulating hole 43, and (c) in FIG.
As shown in 5), it moves to the left end (base) of the restriction hole 43. Along with this, the push rod 32 and the pusher 33 move and return to the left by the reaction force of the return spring 34. In this case, since the cock shaft 36 has not returned to rotation, the open state of the outlet 23 is maintained as shown in (a5) of FIG. 6, and the gas stove continues to burn. In this state, when the gas stove is extinguished due to boiling, etc., the heating of the thermocouple of the thermo-valve 25 is released, the magnetic force disappears, and the valve body 26 is moved to the left by the valve closing spring 29 so that the valve is closed. The port 21 is closed, and the outflow of gas from the outlet 23 is blocked.

Next, when it is desired to forcibly extinguish the fire of the gas stove during combustion, the cock shaft 36 is rotated in the closing direction, and as shown in FIGS. 37 returns to the initial rotation position, the regulating body 41 and the cock valve 31 are rotated in the closing direction via the cam pin 37, and as shown in (e6) of FIG. To stop. Further, the heating of the thermocouple of the thermo valve 25 is released, the magnetic force disappears, and the valve body 26 is moved leftward by the valve closing spring 29 to close the valve port 21.

[0023]

As is apparent from the above description, claim 1
According to the invention, when the cock shaft is rotated in the opening direction, the push rod is advanced through the cam mechanism, and a pusher projected and urged by an elastic body is provided at the advance end of the push rod. Since the thermo-valve is opened with this pressing element, the thermo-valve can always be opened with a constant force, and the operation function of the thermo-valve is stabilized for a long time. The invention according to claim 2 is characterized in that, when the gas stove is not used, the cock is not carelessly opened by an infant or the like, and when the gas stove is used, the cock shaft is pushed to release the rotation lock device. In addition, since the advance position is defined by the restricting body, the thermo valve can always be opened with a constant force regardless of the magnitude of the pushing force on the cock shaft. Further, according to the invention, when the cock shaft is pushed in order to release the rotation lock device and the cock shaft is rotated in the opening direction, the return (reverse movement) of the cock shaft in the axial direction is predetermined. , The suction operation by the magnetic force of the thermo valve at the time of ignition is stabilized, and the ignition operation is facilitated. And so on.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part for explanation showing an embodiment of the present invention.

FIG. 3 is a partial sectional view of a regulating body according to the present invention.

FIG. 4 is a view showing A in FIG. 3;

FIG. 5 is an operation explanatory diagram from an initial stage to a stage prior to an ignition operation according to the present invention.

FIG. 6 is an explanatory diagram of the operation from the time of ignition operation to the time of fire extinguishing according to the present invention.

FIG. 7 is an explanatory sectional view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 20 cock body 21 valve port 22 inflow port 23 outflow port 24 locking groove 25 thermo valve 26 valve body 27 valve rod 28 cylinder 29 valve closing spring 31 cock valve 31a valve hole 31b locking groove 32 push rod 32a shaft part 33 presser 34 Return Spring 35 Mounting Plate 36 Cock Shaft 37 Cam Pin 38 Cock Cam 39 Cam Surface 39a Valley 39b Crest 41 Regulator 41a Bearing 41b Flange 42 Locking Piece 43 Regulator Hole 43a Slope (Return Braking) 44 Lock Claw 45 Cock Spring 50 Rotation lock device 51 Rotation stop plate 51a Lock hole 52 Engagement plate 52a Engagement claw 53 Spring 54 Stopper ring

Claims (3)

[Claims] 1. A valve port (21) is provided at an intermediate portion in the axial direction, an inlet (22) is provided at one end in the axial direction across the valve port (21), and an outlet (23) is provided at the other end in the axial direction. A cylindrical cock body (20) formed respectively is provided, and the inflow port (22) is provided.
A thermo valve (25) that moves axially from the side to open and close the valve port (21), and a cock valve that rotates about the axis of the cock body (20) to open and close the outlet (23) (31), a push rod (32) which moves to one axial end of the cock body (20) in the axial direction and presses the thermo-valve (25) in an opening direction, and the cock valve (31). )
And a cock shaft (36) for rotating the cylinder, and between the cock shaft (36) and the push rod (32),
The push rod (32) when the cock shaft (36) rotates.
Cam mechanism (37, 38,
A gas stove provided with a pusher (33) provided at one axial end of the push rod (32) in a manner to protrude toward the thermovalve (25) by an elastic body (33b). Cock device. 2. The cock shaft (36) is provided so as to be movable in the axial direction, and when the cock shaft (36) is moved to one axial end of the cam mechanism (37, 38, 39), the cock shaft (36) is moved further. A restricting body (41) for restricting the movement of the cock shaft in one axial direction is provided to prevent the cock shaft (36) from rotating when the cock shaft (36) returns to the other axial direction and the initial rotation position. Rotating lock device (5
2. The gas cooker cock device according to claim 1, wherein 0) is provided. 3. After the cock shaft (36) is moved to one axial end of the cam mechanism (37, 38, 39), the cock shaft (36) is moved to the cock valve (3).
When rotated in the opening direction of 1), the cock shaft (3
3. The gas cooker cock device according to claim 2, further comprising a return braking portion (43a) for braking the return in the other axial direction of (6).