KR100347457B1 - Gas cock device - Google Patents

Abstract

(Problem) When the operation shaft 10 is rotated, the plunger 9 moves in the axial direction by moving the pin 14 arranged in the intersecting state on the operation shaft 10 in the axial direction by the guide groove 6b. In the gas cock arrangement, in which the safety valve 3 is opened by moving the plunger 9 by pushing the rod 2, the reliability of the opening operation of the safety valve 3 at the time of ignition operation is further improved. to provide.

(Solution means) An insertion member 15 comprising an arm 15b slidable in the axial direction with respect to the plunger 9 and an insertion plate 15a rotatably fitted to the operation shaft 10 from the outside is provided and inserted. The plate 15a is inserted between the guide member 6 fixed to the main body 1 and the O-ring P on the side of the base plate 7 to impart rotational resistance to the insertion member 15.

Description

Gas cock device {GAS COCK DEVICE}

The present invention relates to a gas cock apparatus for use in gas appliances such as gas tables.

As this kind of gas cock apparatus, when the operation shaft axially supported by the gas cock main body is rotated by the ignition operation by the operation knob, the first follower and the first follower fitted to the operation shaft to be movable in the axial direction The safety valve is provided by a second follower fitted to the outside of the shaft, moving in the axial direction by the cam guide on the outside while interlocking with the operation shaft and pushing the rod in the axial direction in the axial direction. After opening the safety valve and opening the safety valve, if the rod is moved in the axial direction through the first follower by operation of the operation knob, the opening degree of the flow regulating valve is adjusted to the burner in conjunction with the movement of the rod. There is a case where the gas supply amount is increased or decreased (see Japanese Patent Laid-Open No. 9-101024).

In such a gas cock device, the position of the first follower as a plunger to push and push the rod relative to the second follower when the safety valve is opened and when the gas supply amount is adjusted is controlled by one rod. It is also possible to control the opening degree of the flow control valve. By the way, since the 1st, 2nd follower has a large slide contact area with each other, it may be caught in the middle of changing a relative position, and a relative position may not change smoothly.

Here, by arranging the pins in an intersecting state with respect to the operating shaft, and engaging the pin by forming a engaging groove in the plunger, by guiding the spiral in the spiral while rotating the pin around the axis in conjunction with the rotation of the operating shaft It is conceivable to move in the axial direction, press the side of the engagement groove with this pin to move the plunger in the axial direction, and push the rod to push it out. In this case, since the frictional resistance between the pin and the plunger is small, the change in the relative position of the plunger relative to the pin is smooth.

By the way, in the former gas cock apparatus, since the second follower is in sliding contact with the cam guide on the outside, when the first follower linked to the operation shaft is rotated, it is generated between the second follower and the cam guide. The frictional resistance is the rotational resistance. Therefore, the first follower and the second follower move in the axial direction while being rotated precisely following the rotation of the operation shaft and the cam guide. However, in the latter gas cock apparatus, since the pin interlocked with the operation shaft is moved in the axial direction by rotating along the guide groove, the rotational resistance is mainly given only to the pin and not to the plunger. Therefore, the rotational resistance required for the rotation of the plunger becomes extremely small, so that the so-called preliminary rotation in which the plunger is pulled out of the pin may occur because the plunger rotates before the pin. When a pre-rotation occurs, the pin that was holding the side of the engaging groove of the plunger slides and moves to the position at the time of gas supply adjustment, so that the plunger is pushed back by the rod rather than pushing the rod. The safety valve cannot be opened.

This invention is made | formed in view of the above point, Comprising: It makes it a subject to provide the gas cock apparatus with which the reliability of opening of the safety valve at the time of ignition operation was further improved.

1 is a side view having a fracture portion showing a valve closed state of a gas cock device;

2 is an exploded view showing the main structure of the gas cock device;

3 is a side view having a fracture portion showing an ignition state of the gas cock device;

Fig. 4 is a side view having a fracture portion showing a state at the time of gas amount adjustment of the gas cock device;

5 is an enlarged view showing the relationship between the engagement groove of the pin and the plunger;

Explanation of symbols for main parts of the drawings

1: main body (gas cock device) 2: rod

2b: flow control valve 3: safety valve

6: guide member (resistance member) 6b: guide groove

7: base plate 9: plunger

10: operating shaft 14: pin

15: insertion member 15a: insertion plate

15b: arm 90: engaging groove

91: the bomber 92: the bomber

93: inclined portion 93a: inclined surface

P: O-ring (resistance member)

SUMMARY OF THE INVENTION The present invention for solving the above problems comprises: an operating shaft rotatably axially supported by a gas cock body; a pin engaged with the operating shaft in an intersecting state and rotatable about an axis of the operating shaft and movable in an axial direction; And a guide member for guiding the operation of the pin according to the rotation of the operation shaft, a plunger rotating in conjunction with the operation of the pin and moving in the axial direction, and a rod extruded in the axial direction by the plunger to open the safety valve. As a gas cock device, when the pin is engaged with the engaging groove formed in the plunger, and the operating shaft is rotated by applying the rotational force, the plunger rotates in the axial direction while rotating in conjunction with the operation of the pin to press the rod to open the safety valve. When the rotational force is released, the plunger is pushed back by the gripping force applied to the rod to release the force for opening the safety valve. According to, in communication with the plunger aligning walking rotation as well as also with a relative movable member inserted in the axial direction of the plunger, it characterized in that the resistance member is brought into contact with the rotational resistance of the insertion member into the insertion member.

In the gas cock device configured as described above, when the operation shaft is rotated by the operation of the operation knob, the pin rotates along the guide groove of the guide member, the plunger rotates in conjunction with the pin, and the insertion member interlocks with the plunger. Rotates. Since the insertion member rotates while being in contact with a resistance member which becomes a rotational resistance, a force in the opposite direction of rotation is applied to the plunger by the insertion member. This force causes the plunger to be pressed against the pin so that the operation of the plunger is accurately linked to the operation of the pin. This prevents the preliminary rotation of the plunger, thereby improving the reliability of the pin pressing the rod in the axial direction through the plunger, thereby improving the reliability of the opening operation of the safety valve during the ignition operation.

As the insertion member, a member consisting of an arm portion slidable in the axial direction with respect to the plunger and an insertion plate that is rotatably fitted to the operation shaft is used. By this, the position of the insertion member in the axial direction can be determined, and the insertion member can be prevented from being pushed in the axial direction.

Embodiment of the Invention

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on drawing.

In Fig. 1, reference numeral 1 denotes a main body of a gas cock formed of, for example, an aluminum die cast or the like, and a hollow portion 1a formed therein and a gas inlet 1b for introducing gas into the hollow portion 1a. ), A gas outlet 1c for outflowing the gas from the hollow part 1a to the main burner (not shown), and a pilot gas outlet 1d for outflowing the gas from the hollow part 1a to the pilot burner (not shown). do.

The electronic safety which is disposed in the gas cock body 1 in the left and right directions in FIG. 1 and is attached to the rod 2 movable in the left and right directions and in the hollow portion 1a of the gas cock body 1 from the right end side. The valve 3 is attached. Reference numeral 1e denotes a valve seat in which the valve body 3a of the safety valve 3 abuts. The safety valve 3 is extruded to the right by the rod 2 and opened. In the state in which the safety valve 3 is closed, the gas flowing through the gas inlet 1b does not flow downstream of the safety valve 3. In the middle of the rod 2, a flow regulating valve 2a as an on / off valve for adjusting the gas flow rate in the hollow portion 1a is attached, and a valve seat 1f is formed on the downstream side thereof. The rod 2 is supported on the left side by a spring 4 interposed between the valve seat 1e and the flow regulating valve 2a, and the flow regulating valve 2a is connected to the valve seat 1f by the spring 4. In the closed state suppressed by), gas does not flow downstream of the flow control valve 2a.

Moreover, the downstream side of the valve seat 1f in the hollow part 1a is formed narrow, and the amount of gas supplied to the gas outlet 1c according to the distance between the flow regulating valve 2a and the valve seat 1f is small. Adjusted. Further, the hollow portion 1a facing the pilot gas outlet 1d formed further downstream than the gas outlet 1c is formed to have a slightly larger diameter, and the main body 1 and the upstream and downstream ends of the portion are formed. The upstream O-ring 5a and the downstream O-ring 5b which block the clearance with the rod 2 are attached.

Near the left end of the rod 2, a tapered pilot valve 2b is formed. When the rod 2 moves to the right from the valve closing position shown in Fig. 1, the upstream O-ring 5a and the pilot valve ( Since a gap is formed between 2b) (see FIG. 3), the gas can be discharged through the pilot gas outlet 1d. In addition, the downstream O-ring 5b prevents the gas sent to the pilot gas outlet 1d through the pilot valve 2b from leaking into the hollow portion 1a on the plunger 9 side (left end) described later.

At the left end of the hollow portion 1a, a substantially cylindrical guide member 6 made of resin is fitted as shown in Figs. The guide member 6 has a pair of engaging projections 6a projecting to the left through the base plate 7 attached to the left end of the gas cock body 1, and the engaging projections 6a. Is engaged with the engaging hole 8a formed in the approximately C-shaped guide plate 8 attached to the base plate 7. By this engagement, the guide member 6, the base plate 7 and the guide plate 8 are integrally fixed to the gas cock body 1. In the guide member 6, a substantially cylindrical plunger 9 is housed in a slidable state in the axial direction. The plunger 9 is provided with the block part 9a at the right end, and this block part 9a presses the rod 2 when it moves to the right side. The plunger 9 is fitted with a movable shaft 10 having an axial direction in an axial direction. The operation shaft 10 is axially supported by the base plate 7 and the guide plate 8, and is rotatable about the axis line. An operation knob 11 is attached to the operation shaft 10.

The operating shaft 10 has a flange 10a in the middle thereof. Between the flange 10a and the base plate 7, a driving plate 12 and a spring 13 for operating a piezoelectric element (not shown) are sandwiched, and the spring 13 holds the operation shaft 10 to the left. . The convex part 10b is formed in the left side of the flange 10a, and the notch part 8b which the convex part 10b engages when the operation shaft 10 rotates to the valve closing position shown in FIG. 1 is guided. It is formed in the plate 8. In the state where the operation shaft 10 is in the valve closing position, the safety valve 3, the flow regulating valve 2a, and the pilot valve 2b are all closed. A groove 10c extending in the radial direction of the operation shaft 10 is formed at the right end of the operation shaft 10, and the pin 14 is engaged with the groove 10c.

The pin 14 is crossed with respect to the operation shaft 10, and rotates around the axis of the operation shaft 10 in association with the rotation of the operation shaft 10. Both ends of this pin 14 are engaged with the guide groove 6b formed in the side surface of the cylindrical guide member 6. The guide groove 6b is formed in the helical direction of the left screw, and the pin 14 moves in the left and right direction by the guide groove 6b.

Moreover, the pin 14 is engaged with the engaging groove 90 formed in the radial direction at the left end of the plunger 9 in the part between the operation shaft 10 and the guide groove 6b. Therefore, the plunger 9 rotates in conjunction with the rotation of the pin 14. As shown in Fig. 5, the engaging groove 90 is deeply dug to the right side of the drawing, and has a wide light-emitting portion 91 and a bottom side (drawing) which become an opening side (left side of the drawing). A narrow width narrow portion 92 and a slanted portion 93 therebetween, and one side surface that is an upper side of the slanted portion 93 becomes an inclined surface 93a. have. Therefore, when the operation knob 11 is rotated left (counterclockwise) in the state toward the gas cock device and the end of the pin 14 shown in FIG. 5 is rotated upward along the guide groove 6b, the plunger 9 The side surface 90a is pressed by the rotation direction component Fr of the pressure F received from the pin 14, and the inclined surface 93a is rotated by the right direction component Fa of the pressure F. It is moved to the right by being pressed.

In addition, between the base plate 7 and the plunger 9, there is interposed an insertion member 15 fitted to the operation shaft 10 so as to be rotatable from the outside. The insertion member 15 is sandwiched between the O-ring (resistance member) P and the guide member (resistance member) 6 disposed on the right side of the base member 7. The insertion member 15 includes an insertion plate 15a rotatably fitted to the operation shaft 10 and a pair of arm portions 15b extending to the right side from the insertion plate 15a. The pair of arm portions 15b are engaged in the axially slidable state in the pair of engagement passages 9b formed on the outer circumference of the plunger 9, respectively. Thus, for example, when the plunger 9 is rotated left during the ignition operation, one side of the engagement passage 9b is rotated while pressing the arm 15b of the insertion member 15 in the rotational direction. On the other hand, since the insertion plate 15a is sandwiched between the O-rings P and the guide member 6 as described above and is in contact with each other, the rotation opposite occurs between the O-rings P and the guide member 6 when rotated. Frictional force in the direction. The frictional force acts as a rotational resistance that presses the side surface 90a of the plunger 9 against the pin 14 in the opposite direction of rotation through the arm 15b. As a result, the vertical drag received by the pin 14 from the side surface 90a of the plunger 9 becomes large. Therefore, the pre-rotation of the plunger 9 is prevented so that the plunger 9 is interlocked correctly in accordance with the operation of the pin 14. In addition, the insertion member 15 may be in contact with a member other than the O-ring P or the guide member 6 as long as it is rotated while being subjected to a frictional force. In addition, a clearance in the rotational direction may be formed between the arm 15b and the engagement passage 9b.

The operation of the gas cock device having such a configuration will be described.

In the ignition operation of the burner, first, by pressing the operation knob 11 in the valve closing state shown in Fig. 1, the convex portion 10b of the operating shaft 10 inserted in the cutout portion 8b of the guide plate 8 is removed. The operation shaft 110 is rotatable. Subsequently, when the operation knob 11 is turned left (counterclockwise) with respect to the gas cock, the pin 14 rotates left in conjunction with the rotation of the operation shaft 10. The left pin 14 rotates the plunger 9 to the left by pressing the one side 90a of the light-exploding portion 91 in the engagement groove 90. The plunger 9 rotates left while pressing the arm 15b of the insertion member 15 slidably engaged with the engagement passage 9b. When the insertion member 15 receives rotational force from the O-ring P and the guide member 6 in the insertion plate 15a at the time of rotation, the insertion member 15 becomes a rotational resistance of the plunger 9. Further, the left-turned pin 14 moves to the right along the guide groove 6b of the guide member 6 formed in a spiral shape, and at this time, the inclined portion of the engaging groove 90 of the plunger 9 The inclined surface 93a of the 93 is pushed to move the plunger 9 to the right.

When the operation knob 10 is rotated to the left by operating the operation knob 11 in this manner, as shown in FIG. 3, the rod 2 is extruded to the right by the plunger 9 moved to the right, so that the safety valve 3 is rotated. Is opened. In the state where the safety valve 3 is opened, both the flow control valve 2a and the pilot valve 2b are in the open state, so that the gas is supplied to the pilot gas outlet 1d and the gas outlet 1c (Iii) 'Gas is supplied in an amount corresponding to the thermal power. In addition, the rotation range of the operation shaft 10 is limited by the movable range of the pin 14 by the guide groove 6b, but may be limited by forming a separate projection or the like.

If the pilot burner (not shown) is ignited by rotating the drive plate 12 to operate a piezoelectric element (not shown), the main burner (not shown) is ignited by this pilot burner and disposed near the main burner. A thermocouple (not shown) is heated. Until the safety valve 3 is kept open by the thermoelectric power generated by the thermocouple, the rotational force of the left rotation is continuously applied to the operation shaft 10 by the operation knob 11, and the safety valve 3 Is maintained in the open state, the rotation force of the left turn is released. In this way, the left-hand direction component Fr of the pressure F which the plunger 9 receives from the pin 14 is lost, and the right-hand component Fa is lost and the pressure F is released. When the pressure F is released, the plunger 9 is pushed to the left by the rod 2 which is held to the left by the spring 4 so that the pin 14 rests on the width narrow portion 92 of the engagement groove 90. Since it moves to the engaged state (position of the dashed-dotted line of FIG. 5), a gas cock apparatus will be in the gas amount adjustment state shown in FIG. At this time, the plunger 9 is guided by the arm 15b to move to the left, and the pin 14 is pressed by the inclined surface 93a so as to rotate slightly right (clockwise) and the operation shaft 10 rotates slightly right.

Then, the operation shaft 10 is pushed back to the left side by the holding force of the spring 13 until the convex portion 10b abuts against the right side surface of the guide plate 8, and the convex portion of the operating shaft 10 Since the angles of the cutouts 8b of the 10b and the guide plate 8 do not coincide with each other, the operation shaft 10 is maintained in a rotatable state. In addition, the flow regulating valve 2a is kept open, but the pilot valve 2b is closed. When the operating shaft 10 is turned right in this state, the pin 14 moves to the left while turning right along the guide groove 6b, and the rod 2 and the plunger 9 are moved by the holding force of the spring 4. As it flows back to the left side, the flow control valve 2a approaches the valve seat, so that the gas flow rate supplied to the burner is reduced, and the burner's thermal power is weakened. On the other hand, when the operation shaft 10 is turned left in this state, the pin 14 moving to the right while turning left along the guide groove 6b moves the bottom surface of the width narrow portion 92 of the engagement groove 90 to the right. Since it presses, the plunger 9 moves to the right, and the rod 2 is extruded to the right, the gas flow volume supplied to a burner will increase, and the burner's thermal power will become strong.

If the operation shaft 10 continues to turn right, the positions of the convex portion 10b of the operation shaft 10 and the cutout portion 8b of the guide plate 8 coincide with each other, so that the operation shaft 10 is connected to the spring 13. It pushes back and the convex part 10b is fitted in the notch part 8b. In addition, the rod 2 is pushed back to the left by the spring 4 to return to the valve closing position shown in FIG. As a result, the flow regulating valve 2a is closed and gas supply to a burner is stopped, and a burner is extinguished. When the burner is extinguished, the thermoelectric power generated in the thermocouple is reduced so that the safety valve 3 cannot be kept open, so the valve is closed and the entire gas cock device is returned to the valve closed state shown in FIG.

By the way, as shown in FIG. 5, the plunger 9 receives the force Fs of the counterclockwise direction (clockwise) from the arm part 15b of the insertion member 15 at the time of the left rotation (counterclockwise direction) of an ignition operation. Suppress 14 Therefore, according to the present embodiment, the plunger 9 is rotated ahead of the pin 14 and precedes the rod 14 so that the pin 14 slides toward the width narrowing portion 92 side and the plunger 9 moves to the left side so that the rod 2 The phenomenon that the safety valve 3 cannot be extruded to the right through the open position does not occur. That is, during the ignition operation, the pin 14 is reliably engaged with the inclined surface 93a without sliding to the width narrowing portion 92 side, thereby moving the plunger 9 to the right. Therefore, the rod 2 is reliably pushed out by the plunger 9 to the right, thereby increasing the reliability of the opening operation of the safety valve 3 at the time of ignition operation.

In this embodiment, the rotational resistance can be adjusted appropriately by adjusting the frictional force by appropriately changing the contact area or the shape of the contact surface between the insertion member 15 and the O-ring P or the guide member 6. The adjustment of the frictional force is also used to adjust the rotational torque during the rotation operation of the operation knob 11. In addition, the friction force can be adjusted by inserting a wave washer having a suitable elastic force between the base plate 7 and the insertion member 15.

Moreover, in this embodiment, the vertical force received by the pin 14 from the side surface 90a is enlarged, and the friction force between the pin 14 and the side surface 90a is enlarged, and the inclined surface 93a is ensured by the pin 14. It can be pressed to the right. Thereby, the gradient with respect to the side surface 90a of the inclined surface 93a can be made gentle. When the gradient becomes smooth, the pin 14 moves smoothly to the width narrowing portion 92 side when the rotational force applied to the plunger 9 is released from the operation handle 11, so that the plunger 9 and the rod ( 2) can be moved to the gas amount adjusting position shown in FIG.

As described above, according to the present invention, the reliability of the opening operation of the safety valve at the time of ignition operation is further improved.

Claims (2)

An operating shaft rotatably axially supported by the gas cock body, a pin interlocked with the operating shaft and rotatable about an axis of the operating shaft and movable in the axial direction, and guiding operation of the pin according to the rotation of the operating shaft; A gas cock device having a guide member, a plunger which rotates in synchronism with the operation of the pin and moves in the axial direction, and a rod which is extruded in the axial direction by the plunger to open the safety valve. When the pin is engaged with the engaging groove formed on the plunger, and the rotary shaft is applied to rotate the operation shaft, the plunger rotates in the axial direction while rotating in conjunction with the operation of the pin to press the rod to open the safety valve, and release the torque. When the plunger is pushed back by the holding force applied to the rod, the force for releasing the safety valve is released. And a resistance member which rotates in conjunction with the plunger and which is relatively movable in the axial direction, is engaged with the plunger, and the resistance member becomes a rotational resistance of the insertion member. The method according to claim 1, And the insertion member comprises an arm portion slidable in the axial direction with respect to the plunger and an insertion plate rotatably fitted to the operation shaft, wherein the resistance member fits the insertion plate.