JP6124850B2 - Point-extinguishing device - Google Patents

Description

  The present invention relates to a fire extinguisher equipped with a fire extinguishing button that opens and closes a gas passage to a gas burner by a pushing operation.

  In the gas stove, the fire extinguishing and the thermal power control are performed by using the fire extinguishing button and the thermal power control knob provided on the front panel of the gas stove. In the past, these point-extinguishing buttons and thermal power adjustment knobs were provided separately. However, due to design requirements, these point-extinguishing buttons and thermal power adjustment knobs are combined into one operation knob, and the operation knob is pressed. It is known that the fire power of a gas burner is adjusted by performing point extinguishing and turning an operation knob (for example, see Patent Document 1).

  In this case, when the operation knob that functions as a point fire extinguishing button is in the fire extinguishing position, set the operation knob so that it does not protrude from the front panel of the gas stove. The operation knob protrudes forward from the front panel so that the operation knob can be easily rotated, and it is easy to visually recognize that the operation knob is in combustion.

  On the other hand, when the operation knob is pushed from the fire extinguishing position to the ignition position, a rod for forcibly opening the valve body of the electromagnetic safety valve and pressing the valve body against the electromagnet built in the electromagnetic safety valve is provided. . In addition, a main valve is provided in the middle of the rod, and when the rod moves by pushing the operation knob from the fire extinguishing position to the ignition position, the main valve opens from the closed state. When the operation knob returns from the ignition position to the combustion position, the rod also returns to the near side, but it is necessary to lock the rod at a position where the main valve provided on the rod opens.

  If the combustion position is set to the pushing side with respect to the fire extinguishing position, the main valve can be held in the open state by bringing the rod toward the front side into contact with the operation knob. If the combustion position is set in front of the fire extinguishing position, even if the rod is locked at an intermediate position by the operation knob, the main valve closes and gas cannot be supplied to the gas burner.

  Therefore, in the device described in Patent Document 1, when the operation knob returns from the ignition position to the combustion position, there is provided a lock mechanism that locks the rod at an intermediate position and holds the original valve in an open state.

JP-A-6-58535 (FIG. 2)

  In the conventional point-extinguishing device, the rod is locked at a midway position by the lock mechanism when the operation knob is at the combustion position. The rod is moved to the near side and the original valve is closed. However, since the rod moves to the near side at that time, the operation knob moves to the back side, both of them collide, and the vibration is transmitted to the operation knob. In this state, the finger touches the operation knob to push it in, so that the vibration of the collision is transmitted to the finger and the operation feeling is impaired.

  Then, this invention makes it a subject to provide the point fire extinguishing apparatus which can relieve | moderate the impact of the collision in the case of fire extinguishing operation, and can prevent that a feeling of operation is impaired in view of said problem.

In order to solve the above-described problems, a point-extinguishing apparatus according to the present invention includes a point-extinguishing button that is movable in the front-rear direction and opens and closes a gas passage to the gas burner by a pushing operation, and the point-extinguishing button is ignited from the extinguishing position. When it is pushed to the position, the fire extinguishing button pushes on the rod that is long in the front-rear direction and the main valve is provided in the middle to open the main valve and the valve element provided on the electromagnetic safety valve at the tip of the rod When the valve was forced to open and the valve element was pressed against the electromagnet built in the electromagnetic safety valve, and the pushing force against the fire extinguishing button was released from the ignition position, the fire extinguishing button was set to the near side of the fire extinguishing position. In a point-extinguishing device that retreats to the combustion position by the urging force, a restricting member that can move in the front-rear direction is interposed between the point-extinguishing button and the rod, and the point-extinguishing button When the ignition button is pushed to the ignition position, the point-extinguishing button pushes the rod together with the restricting member, and when the point-extinguishing button retracts to the combustion position, the restricting member is moved to the near side and locked to the rod. The lock mechanism that holds the main valve in the open state is provided, and when the point-extinguishing button is returned from the combustion position to the extinguishing position, the lock mechanism is unlocked by the locking mechanism with the point-extinguishing button and the regulating member separated And a biasing means for moving the regulating member, which is unlocked by the locking mechanism , to the near side, and toward the point-extinguishing button where the regulating member is located on the near side by the biasing means. When returning, it is characterized in that a buffering means is provided for mitigating the impact caused by the restricting member colliding with the fire extinguishing button.

  By providing the buffer means, it is possible to mitigate the impact caused by the restriction member colliding with the point fire extinguishing button, and as a result, the impact transmitted to the finger during the fire extinguishing operation is reduced.

  As is apparent from the above description, the present invention does not impair the operational feeling because the impact transmitted to the finger during the fire extinguishing operation is reduced.

The perspective view seen from the front of the gas stove to which the point fire extinguishing device of the present invention is applied The figure which shows the piping state in a gas stove Perspective view of a point fire extinguisher Exploded perspective view of a point fire extinguisher Diagram showing cam groove shape of heart cam Diagram showing heart cam position and spring bar status Sectional drawing which shows the state which an operation knob moves to a combustion position through an ignition position from a fire extinguishing position The figure explaining the function of a buffer means The figure explaining the function of other buffer means

  With reference to FIG. 1, 1 is a gas stove to which the point-extinguishing apparatus according to the present invention is applied. A top plate 11 is provided on the upper surface of the gas stove 1, and the top plate 11 is provided with three gas burners 11a, 11b, and 11c. On the other hand, the front panel 12 of the gas stove 1 is provided with thermal power control devices 13a, 13b, 13c for performing point-extinguishing operations and thermal power control operations of the gas burners 11a, 11b, 11c. A point fire extinguishing device is incorporated in each of 13c. In addition, a grill box 14 is provided in the approximate center of the front panel 12, and an upper fire burner 14 a and a lower fire burner 14 b are installed in the grill box 14. Then, the fire extinguishing and the thermal power adjustment of the upper fire burner 14 a and the lower fire burner 14 b are performed by the thermal power adjusting device 15.

  Referring to FIG. 2, in the present embodiment, the gas supply lines are branched into four in parallel, and thermal power control devices 13a, 13b, 13c, and 15 are provided in each of the branched supply lines. It has been. The thermal power control device 13a will be described as an example. The thermal power control device 13a includes the thermal power control device and an on-off valve unit 2 for performing point extinguishing and a flow rate control unit 3 for performing thermal power control.

  In the on-off valve portion 2, a main valve 21a that is opened by a manual operation and a valve body 22a of an electromagnetic safety valve are provided in series. On the other hand, a motor 31 is connected to the flow rate adjusting unit 3, and the flow rate is increased or decreased by driving the motor 31. Although both the thermal power control devices 13b and 13c have the same structure as the thermal power control device 13a, the thermal power control device 15 has the same structure as the on-off valve unit 2, but the structure of the flow rate control unit 3 is different from the other.

  The flow rate control unit 3 of the thermal power control device 15 is branched into two parallel systems, each of which is provided with on / off valves 15a and 15b that open and close by electromagnetic force, and an orifice 16 that bypasses both the on / off valves 15a and 15b. It has been. Therefore, for example, when the on-off valve 15a is opened, the heating power of the upper fire burner 14a becomes high fire, and when the on-off valve 15a is closed, the gas passing through the orifice 16 makes low fire.

  With reference to FIG. 3 and FIG. 4, the structure of the thermal power control device 13a will be described by taking the thermal power control device 13a as an example. Reference numeral 41 denotes an operation knob that functions as a point fire extinguishing button and a heating power adjustment knob. The operation knob 41 is pushed in during the point fire extinguishing operation, and is rotated by holding the outer peripheral surface during the heating power adjustment operation. Inside the operation knob 41, an inner member 42 that is integral with the operation knob 41, moves forward and backward as part of the operation knob 41, and rotates, is connected to the rotation member 44. On the other hand, it is movably engaged in the front-rear direction. A coil spring 43 is contracted between the inner member 42 and the rotating member 44, and the operation knob 41 is always urged forward through the inner member 42.

  The rotating member 44 is loosely fitted to a guide shaft 48 that engages with a bracket 47 made of sheet metal, and can rotate about the guide shaft 48. The guide shaft 48 is provided with an engaging claw for engaging the rotation member 44 so as not to move forward, and the rotation member 44 is pressed against the bracket 47 by the reaction of the coil spring 43. The member 44 can only rotate without moving in the front-rear direction. Since the rotation member 44 is engaged with the inner member 42, when the operation knob 41 is rotated, the rotation member 44 is rotated via the inner member 42.

  A gear 44a is formed on the outer peripheral surface of the rear end portion of the rotating member 44, and a pinion 45 is engaged with the gear 44a. The pinion 45 is fitted on a shaft 46a of a rotary encoder 46 that is a rotation sensor. Therefore, when the rotation member 44 rotates, the shaft 46a of the rotary encoder 46 rotates. An electrical switch is provided in the rotary encoder 46, and when the shaft 46a rotates, the switch repeats on / off every predetermined angle, so that a pulse signal is output every time the shaft 46a rotates by a predetermined angle. Is. The motor 31 operates in response to the pulse signal, and a built-in needle valve (not shown) moves back and forth to increase or decrease the opening, thereby adjusting the gas flow rate.

  A guide member 5 is attached to the rear of the bracket 47. The guide member 5 has a function of guiding the slider 62 and the regulating member 8 which are two members so as to be movable in the front-rear direction. Since the slider 62 moves in the front-rear direction together with the operation knob 41, the slider 62 functions as a part of the operation knob 41 when at least the operation knob 41 functions as a point-extinguishing button. Further, a micro switch 51 having two built-in contacts that are turned on and off depending on the position of the regulating member 8 is attached to the left side as viewed from the front. A window hole 52 from which an engaging claw 81 formed on the regulating member 8 projects is formed on the right side surface. Similarly, a lock plate 7 is attached to the right side surface so as to be swingable in the vertical direction. A lock portion 72 is formed on the lock plate 7. When the lock plate 7 swings upward and overlaps the window hole 52, the engagement claw 81 of the restriction member 8 comes into contact with the lock portion 72, thereby restricting the restriction. The lock mechanism is configured so that the movement of the restricting member 8 is locked so that the member 8 cannot move further forward. The buffer window 54 and the buffer claws 83 of the regulating member 8 constitute a buffer mechanism described later.

  The slider 62 is provided with an arm 61 protruding forward, and this arm is rotatably engaged with the inner member 42. Therefore, when the operation knob 41 is pushed in, the slider 62 moves through the arm 61 to the back side in the guide member 5. When the operation knob 41 is returned to the front by the biasing force of the coil spring 43, the slider 62 is also moved forward through the arm 61.

  A heart cam 6 is integrally provided on the slider 62, and a spring rod 71 into which the tip end portion 71 a is inserted into the cam groove of the heart cam 6 is held by the guide member 5 so as to be swingable. Since the tip 71a of the spring bar 71 is inserted through the window hole 73 of the lock plate 7, when the tip 71a swings and the vertical position is displaced, the lock plate 7 moves up and down in accordance with the displacement. Swing in the direction.

  A rod 21 projects forward from the on-off valve portion 2, and a coil spring 82 is contracted between the on-off valve portion 2 and the regulating member 8. Therefore, the regulating member 8 is always urged forward by the coil spring 82. However, when the slider 62 moves backward by pushing the operation knob 41, if the regulating member 8 is pushed by the slider 62, the regulating member 8 8 also moves backward to push the rod 21 backward. The rod 21 is provided with a main valve 21a described later. Further, when the slider 62 moves forward, the regulating member 8 also moves forward due to the urging force of the coil spring 82. At that time, the lock plate 7 swings upward and the lock portion 72 overlaps the window hole 52. As described above, the engaging claw 81 comes into contact with the lock portion 72 and the movement of the restricting member 8 is restricted.

  Referring to FIGS. 5 and 6, the heart cam 6 is formed with a substantially heart-shaped cam groove. When the operation knob 41 is in the fire extinguishing position, the tip 71a of the spring bar 71 is in the position a shown in FIG. When the operation knob 41 is pushed to the ignition position at the time of ignition from that position, the heart cam 6 moves backward, and at that time, the distal end portion 71a moves from a to b. At the time of the movement, the distal end portion 71a gets over the stepped portion D1, so that the pushing force against the operation knob 41 is released after completion of ignition, and the heart cam 6 moves together with the slider 62 to the heating power adjustment position which is the foremost end by the biasing force of the coil spring 43. At this time, the tip 71a does not return to a but moves to c beyond the step D2.

  When the fire is extinguished, the operation knob 41 is pushed in again. At this time, the tip 71a moves from c to d. Note that the vehicle travels over the step D3 immediately before reaching d. When the pushing force on the operation knob 41 is released from this state, the slider 62 returns to the front by the urging force of the coil spring 43, and the tip end portion 71a returns to a corresponding to the fire extinguishing position again over the step portion D4.

  With reference to FIG. 7, (a) has shown the state which has the operation knob 41 in a fire extinguishing position. In this fire extinguishing state, the operation knob 41 is substantially flush with the front panel 12. At this time, a gap is secured between the slider 62 and the regulating member 8 by a buffer mechanism described later, and the slider 62 and the regulating member 8 are not in contact with each other. Further, the front end of the rod 21 is separated from the regulating member 8. Therefore, the main valve 21a attached to the approximate center of the rod 21 is closed, and the valve body 22a of the electromagnetic safety valve 22 is also closed. Thus, since the main valve 21a and the valve body 22a constituting the on-off valve portion 2 are both closed, the gas does not flow to the flow rate adjusting portion 3.

  (B) has shown the state by which the operation knob 41 was pushed in to the ignition position. When the operation knob 41 is pushed down to the ignition position in this way, it is pushed by the slider 62 and the regulating member 8 also moves backward. At this time, the rod 21 is also pushed backward, so that the valve body 22a of the electromagnetic safety valve is pushed by the rear end of the rod 21 at the same time as the main valve 21a is opened. In this state, an electromagnet (not shown) in the electromagnetic safety valve 22 is energized, and the movable iron piece connected to the valve body 22a is attracted to the electromagnet.

  When the pushing force on the operation knob 41 is released from that state, the operation knob 41 protrudes forward and moves to the combustion position as shown in FIG. At that time, the slider 62 also moves forward together, but the lock plate 7 swings upward to restrict the movement of the restriction member 8 forward. In this state, the rod 21 is in contact with the regulating member 8, and the main valve 21a is held in a state in which the valve is opened. Further, the rear end of the rod 21 is retracted to a position where it does not interfere when the valve body 22a of the electromagnetic safety valve 22 returns to the valve closing position. Therefore, if the burner misfires during cooking, the valve body 22a is closed by shutting off the suction holding current that is energized to the electromagnetic safety valve 22, and the supply of gas to the gas burner is stopped. Can do.

  Referring to FIG. 8, (a) of FIG. 8 shows a state in which the operation knob 41 is at the heating power adjustment position (combustion position) as in (c) of FIG. The restricting member 8 tends to move leftward in the figure by the urging force of the spring 82, but the engaging claw 81 formed on the restricting member 8 abuts on the lock portion 72 of the lock plate 7, and the restricting member 8 moves leftward. I can't move. In this state, the lock plate 7 abuts against the abutting portion 53 and cannot swing counterclockwise in the figure, and the inner wall of the window hole 73 abuts against the tip 71a of the spring bar 71, It cannot swing clockwise. In addition, although the buffer pawl 83 is located in the buffer window 54 but is not in contact with any of them, the buffer mechanism is not functioning.

  When the operation knob 41 is pushed in to extinguish the fire from the state shown in (a), the distal end 71a of the spring bar 71 moves downward in the figure, but by the movement, the lock plate 7 immediately swings clockwise and the lock portion When 72 is disengaged from the engaging claw 81, the distance between the slider 62 and the restricting member 8 is increased, so that the moving speed of the restricting member 8 toward the slider 62 increases.

  However, as shown in (b), just before the regulating member 8 collides with the slider 62, the buffering claw 83 engages with the end 54a of the buffering window 54 to stop the movement of the regulating member 8, and the regulating member 8 becomes the slider. No collision with 62. As described above, since the regulating member 8 does not collide with the slider 62, it is possible to greatly reduce the impact that will occur when the regulating member 8 collides.

  As described above, the impact may be reduced by preventing the restricting member 8 from colliding with the slider 62. However, as shown in FIG. 9A, a rubber cushion 91 is attached to the restricting member 8 so as to prevent the impact. You may relieve the impact. Further, as shown in FIG. 5B, permanent magnets 92 are provided on both the regulating member 8 and the slider 62 so that the magnetic poles facing each other are of the same type, and the speed at the time of collision is increased by the repulsive force of the magnetic force. You may make it decelerate and relieve an impact.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Gas cooker 2 On-off valve part 3 Flow volume adjustment part 5 Guide member 6 Heart cam 7 Lock board 8 Control member 12 Front panel 13a Thermal power control device 13b Thermal power control device 13c Thermal power control device 14 Grill box 15 Thermal power control device 21 Rod 21a Main valve 22 Electromagnetic Safety valve 22a Valve body 31 Motor 41 Operation knob 46 Rotary encoder 54 Buffer window 62 Slider 71 Spring bar 72 Lock part 81 Engaging claw 83 Buffer claw 91 Cushion 92 Permanent magnet

Claims (1)

It has a point-extinguishing button that can move in the front-rear direction and opens and closes the gas passage to the gas burner by pushing.When the point-extinguishing button is pushed from the fire-extinguishing position to the ignition position, it is long in the front-rear direction and is An electromagnet built in the electromagnetic safety valve by opening the main valve by pressing the fire extinguishing button on the rod on which the valve is provided, and forcibly opening the valve body provided on the electromagnetic safety valve at the tip of the rod In the point-extinguishing device, the point-extinguishing button moves backward to the combustion position set before the extinguishing position by the urging force. When a restricting member that is movable in the front-rear direction is interposed between the button and the rod, when the point-extinguishing button is pushed from the extinguishing position to the ignition position, the point-extinguishing button is restricted. When the rod is pushed together with the material and the point-extinguishing button is retracted to the combustion position, a lock mechanism is provided that locks the movement of the regulating member toward the front and keeps the original valve provided on the rod open. When the point fire extinguishing button is returned from the combustion position to the fire extinguishing position, the lock mechanism is unlocked by the locking mechanism with the point extinguishing button and the regulating member being separated from each other. An urging means for moving the released restriction member to the near side is provided, and the restriction member collides with the point fire extinguishing button when the restriction member returns toward the point fire extinguishing button located in front by the urging means. A point-extinguishing device, characterized in that a shock-absorbing means for mitigating the impact caused by the shock is provided.

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