TWI571601B - Gas cocks (c) - Google Patents

Description

Gas cock (3) Field of invention

The present invention relates to a gas cock that performs an operation of temporarily pressing an operating shaft in a fully closed state at the time of ignition.

Background of the invention

As the above-mentioned conventional gas cock, there is known an operating shaft for rotating a plug which is built in a gas cock, and by rotating the operating shaft to interlock with the operating shaft to rotate the plug to increase or decrease the gas. Traffic. At the time of ignition, the operating shaft is temporarily pressed in the fully closed state, and the pressed state is maintained, and when the operating shaft is rotated toward the full opening direction, the opening degree of the plug is increased.

On the other hand, the gas cock has an electromagnetic safety valve therein, and the electromagnetic safety valve can be opened by the ignition operation. Specifically, the operating shaft is provided with a cam, and when the opening degree of the plug is suitable for the opening degree of the ignition, the rotational operating force acting on the operating shaft is transmitted from the operating shaft through the cam to the valve of the electromagnetic safety valve. body. Moreover, when the valve body crimps the electromagnetic stone of the electromagnetic safety valve, when the gas burner is ignited, the electromagnetic stone is excited to cause the valve body to be adsorbed and held in the open state. However, when the operating shaft is pressed in the fully closed state, the state of the pressing is maintained to be rotated in the fully open direction, and the electromagnetic safety valve must be made The valve body is crimped to the electromagnet. When the pressing force on the operating shaft is slowed down during the rotation, the engagement between the operating shaft and the cam is released, and the cam does not rotate, so the ignition cannot be performed. At this point, it is necessary to return the operating shaft to the fully closed state, and restart the ignition operation from the beginning.

Advanced technical literature Patent literature

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2008-89145 (paragraphs 0050, 0051)

Summary of invention

In the above-mentioned prior art, in order to open the electromagnetic safety valve during the ignition operation, the operating shaft is rotated to a predetermined opening degree while maintaining the state of the operating shaft, thereby maintaining the depressed state and utilizing the rotational operating force. The valve body of the electromagnetic safety valve is crimped to the electromagnet, and the pressing force to the operating shaft and the rotational operating force must be continuously applied to the gas burner to ignite and the valve body is adsorbed and held by the electromagnet. Therefore, there is a problem that it is difficult to perform an ignition operation for an elderly person with a degraded muscle of the hand or a hand with a handicap.

Accordingly, the present invention has been made in view of the above problems, and it is an object of the invention to provide a gas cock which can perform an ignition operation more easily than the prior art.

In order to solve the above problems, the gas cock of the present invention has an electromagnetic safety valve that is adsorbed by an electromagnet and holds a valve body that gives potential energy in a valve closing direction in a fully open state, and is rotatably operated from a fully closed position across a firepower operation range. Operating the shaft and, when igniting the gas burner connected to the downstream, pressurizing the operating shaft in the fully closed position, and in the series of ignition actions in which the pressed state is rotated toward the fully open position, the electromagnetic safety valve is actuated The valve body is press-contacted to the electromagnet, and is provided with a swinging member that is oscillated in conjunction with the press-fitting operation of the operating shaft, and the swinging member swings, and the valve body of the electromagnetic safety valve is pressed by the swinging member to make the valve The body pressure is connected to the electromagnet, and the valve body is brought into pressure contact with the electromagnet while the operating shaft is rotated toward the fully open position.

According to the above configuration, the swinging member can be swung by pressing the operating shaft, and the valve body of the electromagnetic safety valve can be pressed by the swinging member to be pressed against the electromagnet. It is easier to press down than to rotate the operating shaft, and since the weight can be utilized in the direction of pressing down, a greater force can be exerted. Therefore, the valve body of the electromagnetic safety valve and the electromagnetic stone can be reliably crimped. Further, while the operation shaft is being rotated, the state in which the valve body is pressed against the electromagnet can be constantly maintained.

However, the valve body in which the electromagnetic safety valve cannot be disposed on the axis of the operation shaft is structurally considered. Therefore, it is conceivable to fix the plate member on the operation shaft and press the valve body of the electromagnetic safety valve with the plate member, but The operation shaft must be rotated more in a state in which the valve body of the electromagnetic safety valve is pressed. Therefore, since the plate member is also rotated when the operation shaft fixes the plate member, friction is generated in the portion where the valve body is pressed, and the rotation operation is performed. It will become heavy.

Therefore, it is preferable to provide an upper and lower plate that is engaged with the operation shaft and that moves up and down together with the operation shaft in a state where the rotation is stopped, and the upper and lower plates are used to swing the swing member and the valve body of the electromagnetic safety valve is pressed against the electromagnetic stone.

As can be understood from the above description, the present invention utilizes the force of pressing the operating shaft to press the valve body of the electromagnetic safety valve against the electromagnet during the ignition operation, and thus is a conventional technique of crimping with a rotational operating force. The valve body can be more reliably crimped to the electromagnet.

1‧‧‧ gas cock

2‧‧‧Operating shaft

3‧‧‧Up and down board

4‧‧‧ Spring

5‧‧‧ cam

6‧‧‧ bracket

8‧‧‧Main and secondary burners

12.13‧‧‧Export

14‧‧‧Electromagnetic safety valve

15‧‧‧Put

16‧‧‧Swing axis

17‧‧‧Swing plate

17a‧‧‧ Protrusion

21‧‧‧Axis

22‧‧‧ditch

Prominence of 31‧‧

32‧‧‧ Large Cave Department

33‧‧‧Small hole department

34‧‧‧Point of action

41‧‧‧ claws

42‧‧‧Clock Department

51‧‧‧ cam surface

52, 53‧‧ ‧ recess

54‧‧‧ convex

71, 72‧‧‧ micro switch

81‧‧‧Main burner

82‧‧‧Sub burner

a, b, c, d, e, f‧‧‧ range

Fig. 1 is a perspective view of one of the gas cocks of the present invention.

Fig. 2 is a perspective view seen from the other side of the gas cock.

[Fig. 3] is an exploded view of the same gas cock.

[Fig. 4] is a view showing details of a cam.

Fig. 5 is a view showing a relationship between a spring and an upper and lower plates and an operation shaft.

Fig. 6 is a view for explaining a rotational phase of an operation shaft.

1 to 3, 1 is an example of a gas cock of the present invention. The Benvas cock 1 introduces gas from the inlet, divides the introduced gas into two systems, and flows the gas from the two outlets 12, 13. 8 is a primary and secondary burner, and is piped so that the gas flowing out from the two outlets 12, 13 is supplied individually to the main burner 81 and the sub-burner 82.

When the fire-extinguishing state in which the two-outlet outlets 12 and 13 are not flowing out, that is, the main-secondary burner 8 is ignited from the fully-closed state, the operating shaft 2 is pushed downward, and the pressed-in state is maintained and left to the left. Rotate.

The operation shaft 2 is mounted with the upper and lower plates 3 moving up and down together with the operation shaft 2, and by pressing the operation shaft 2, the upper and lower plates 3 are moved downward and the micro-motion is opened. Off 72 is on. In this way, the controller outside the figure detects the situation in which the operating shaft 2 is pressed in, so that the igniter outside the drawing is activated and intermittent spark discharge is generated in the vicinity of the main and sub-burner 8.

The operating shaft 2 is also moved up and down together with the operating shaft 2, and the cam 5 that is rotated together with the operating shaft 2 is disposed above the upper and lower plates 3. When the operating shaft 2 is rotated by the state in which the operating shaft 2 is pressed, the cam 5 causes the micro switch 71 to be opened, and the controller can detect the rotation of the operating shaft 2. Further, a plug (not shown) is attached to the lower end of the operating shaft 2. When the operating shaft 2 is rotated, the plugs are also rotated together, and the flow rate of the gas flowing out from the outlets 12 and 13 gradually increases, at least in Before the opening of the plug reaches full opening, the primary and secondary burners 8 will surely ignite.

Further, an electromagnetic safety valve is housed in the position shown at 14, and when the upper and lower plates 3 are moved downward, the micro switch 72 is opened and the projection 17a of the oscillating plate 17 is pressed down. The oscillating plate 17 is rotatably held around the swing shaft 16. When the projection 17a is pressed down, the oscillating plate 17 swings rearward and presses the push rod 15 rearward.

Further, when the push rod 15 is pressed rearward, the valve body of the electromagnetic safety valve is pressed against the electromagnetic stone, and when the ignition of the main and sub-burner 8 is completed in this state, the electromagnet is supplied. Maintain current to attract the valve body. Therefore, the ignition is completed and the hand is released from the operation shaft 2, whereby the electromagnetic safety valve can continue to be in the open state even if the operation shaft 2 is returned upward and the swinging plate 17 does not press the push rod 15 backward.

Referring to Fig. 4, the outer peripheral surface of the cam 5 becomes a cam surface 51 for opening the micro switch 71 described above. The cam 5 will be hollow and the inner peripheral surface is formed Two concave portions 52, 53 and one convex portion 54.

On the other hand, as shown in FIG. 5, the upper and lower plates 3 are formed with a pair of upright projections 31, and the elastic member, that is, the spring 4 wound in a circular shape is engaged with the projections 31. Both ends of the wire constituting the spring 4 are bent inward to form the claw 41. The claw 41 is configured such that it engages with the above-mentioned projection 31 and does not rotate with respect to the upper and lower plates 3 of the spring 4. On the other hand, the two claws 41 can be bent downward, and the upper and lower plates 3 are not provided with the projections 31 but are inserted into the claws, and the claws which are bent downward are inserted in the holes, thereby stopping the rotation.

Further, the engaging portion 42 is formed to extend outward and is engaged with the concave portions 52 and 53. However, when the concave portion 52, 53 or the convex portion 54 is formed on the ceiling surface of the cam 5, the engaging portion 42 is folded. The curved ground is formed and raised upwards.

On the other hand, the upper and lower plates 3 move up and down together with the operation shaft 2 as described above, but when moving downward, it is necessary to open the micro switch 72 and to press the projection 17a. However, since the action point 34 that acts to press the micro switch 72 or the protrusion 17a is separated from the operation shaft 2, when the upper and lower plates 3 are attached to the operation shaft 2, the upper and lower plates 3 are inclined. Since the action point 34 is shifted upward, there is a problem that the push rod 15 cannot be sufficiently pushed backward, and the micro switch 72 cannot be opened. Therefore, in the operation shaft 2, the upper and lower plates 3 are fitted with almost no gap, and in the fitted state, the groove 22 of the width dimension which can rotate the operation shaft 2 is formed, and the other side can pass the operation shaft in the upper and lower plates 3. The large hole portion 32 of the shaft portion 21 of the second portion is formed in communication with the small hole portion 33 having a diameter close to the bottom of the groove 22, and the operation shaft 2 is passed through the large hole portion 32, and then the small hole portion 33 is fitted into the groove 22, Take this up and down The plate 3 is mounted to the operating shaft 2 without any gaps. On the other hand, when the gas cock 1 is assembled, since the bracket 6 restricts the movement of the upper and lower plates 3 in the horizontal direction, the groove 22 does not move toward the large hole portion 32 side.

Referring to Fig. 6, as described above, when the ignition is performed from the fire-extinguishing state, that is, from the fully-closed state, the operation shaft 2 is first pressed downward (a). Further, the operation shaft 2 is rotated to the left (b) while maintaining the press-in state. When the operation shaft 2 is rotated to the strong fire position (fully open position), the engaging portion 42 of the spring 4 is fitted into the concave portion 52 to generate a key sensation, and since the torque for rotating the operation shaft 2 is increased, the operator You can know that its position is the fully open position. When the pressure is maintained in the state of the operating shaft 2 for a certain period of time, the ignition of the primary and secondary burners 8 ends, and the valve body of the electromagnetic safety valve is adsorbed to the electromagnet. When the hand is released in this state, the operating shaft 2 is returned upward by the potential energy of a spring (not shown). When the operating shaft 2 is rotated during the period from the fully open state to the fully closed state (c), the heating power of the primary and secondary burners 8 is increased or decreased.

Next, when only the sub-burner 82 is in the combustion state, the operation shaft 2 is rotated to the left side beyond the fully open position. The range indicated by d is that the two burners 81 and 82 are in a strong fire state and the heating power is not changed, but the engaging portion 42 is fitted to the next concave portion 53, whereby the operating shaft 2 is temporarily stopped. Further, when the operating shaft 2 is rotated to the left, only the fire power of the main burner 81 is limited (e), but in the range of e, the main burner 81 has a backfire phenomenon, so The operating shaft 2 is intended to stop within the range of e. Therefore, the convex portion 54 is provided.

When the engaging portion 42 of the spring 4 moves from d to e, the recess 53 is fitted, but in order to rotate it further to the left, the engaging portion 42 must pass over the convex portion 54. Therefore, in order for the operating shaft 2 to continue to rotate, a large torque is required. If it has not crossed the convex In the portion 54, the operation shaft 2 is reversed to the right, but when it passes over the apex of the convex portion 54, the torque is rapidly reduced, so that the operation shaft 2 is rotated to the range of f by one breath.

At the point of entry into the range of f, the main burner 81 has been fired, and the sub-burner 82 is burning in a strong fire state. When the rotation is further to the left within the range of f, the fire power of the sub-burner 82 can be limited to the minimum heating power. From this state to the firing of the main and sub-burner 8, it is only necessary to rotate the operating shaft 2 to the right to the fire extinguishing position. The convex portion 54 is again passed over the middle, and the key tone is generated by sequentially fitting the concave portions 53, 52.

However, the present invention is not limited to the above-described embodiments, and various modifications may be added without departing from the scope of the invention.

1‧‧‧ gas cock

2‧‧‧Operating shaft

3‧‧‧Up and down board

4‧‧‧ Spring

5‧‧‧ cam

6‧‧‧ bracket

14‧‧‧Electromagnetic safety valve

15‧‧‧Put

16‧‧‧Swing axis

17‧‧‧Swing plate

17a‧‧‧ Protrusion

31‧‧‧ Protrusion

71, 72‧‧‧ micro switch

Claims (1)

A gas cock having an electromagnetic safety valve that adsorbs a valve body with a potential energy in a valve closing direction and holds the valve body in a fully open state, and an operation of rotating from a fully closed position across a fire operation range a shaft, and when the gas burner connected to the downstream is ignited, the operating shaft is pressed in the fully closed position, and the valve body of the electromagnetic safety valve is made in a series of ignition actions in which the pressing state is rotated toward the fully open position. The oscillating member formed of the oscillating shaft and the oscillating plate that is oscillated in conjunction with the press-fitting operation of the operating shaft is provided, and the oscillating member is swung by the oscillating member, and the electromagnetic safety valve is pressed by the oscillating member. The valve body is pressed against the electromagnet by the valve body, and while the operating shaft is rotated toward the fully open position, the valve body is held in a state of being pressed against the electromagnet, and the state is engaged with the operation shaft to stop the rotation. The upper and lower plates that move the shaft up and down together, and the upper and lower plates are used to swing the swinging member so that the valve body of the electromagnetic safety valve is pressed against the electromagnet.