JP5484270B2 - Gas stove - Google Patents

Description

  The present invention relates to a gas stove that can store a gas burner and five victories in a stove body when the gas burner is not used.

  As this type of gas stove, there is a gas stove that raises and lowers the top plate so that the gas burner and the five virtues are stored and not stored (Patent Document 1). The elevating part of the top plate includes a rack provided downward on the top plate portion, a pinion gear that meshes with the rack, and an electric motor that rotates the pinion gear. When using the gas burner, the top plate is lowered by the elevating unit to hold the top plate at the lowest position where the gas burner and five virtues are exposed, and when the gas burner is not used, the top plate is raised by the elevating unit. The top plate is held at the highest position above the gas burner and the five virtues (paragraph 0026 and paragraph 0027 of Patent Document 1).

JP 2003-247723 A

However, in the gas stove, since the elevating part is a gear drive type using a rack and a pinion gear, when the rotation direction of the gear is switched, a positional shift or a large load is received due to an influence of a gap (backlash) between the gears. For this reason, at the lowest position where the elevating part is stopped in the descending process, the position is not fixed due to the backlash corresponding to the backlash, and the position shift occurs at the highest position when it is raised next time. In addition, when the ascent starts from the lowest position, the load on the top plate is applied together with the load caused by backlash, and at that time, a large load is applied and an impact is generated, and the ascending / descending part may fluctuate and the ascending operation may not be performed smoothly. is there. For this reason, the electric motor needs to have a large size having a relatively large driving force.
In addition, while the gas burner is in use, a recess is formed by the descending of the top plate, so that heat is applied to the recess and the top plate is overheated, and it is difficult to understand the state of the fire. It is not preferable.

  The present invention has been made in view of the above circumstances, and even if a gear-driven lifting mechanism is used for storing and not storing a gas burner and five virtues, a positional shift is not generated and a smooth lifting operation is performed. Furthermore, it is an object of the present invention to provide a gas stove that can easily understand the state of fire without overheating the top plate during use of the gas burner.

The gas stove according to the present invention is
In the gas stove where the gas burner and the five virtues are arranged at the opening of the top plate arranged at the top of the stove body,
A lifting platform on which a gas burner and five virtues are arranged via a support;
The upper and lower parts of the virtues and gas burner are vertically moved up and down to the use position where the opening is closed by the support, and the storage position where the gas burner and virtues are stored in the stove body. A gear-driven lifting mechanism,
Control means for controlling the lifting operation of the lifting mechanism,
When controlling the lifting mechanism to move the lifting platform from the use position to the storage position, the control means lowers the lifting platform to the lowest position below the storage position and then raises the lift platform from the lowest position. In the ascending process, the control unit is configured to stop at the storage position without any play between the gears, and to perform control to stop the lift platform from the storage position to the use position when performing control to raise the lift from the storage position to the use position .

With the above configuration, the lifting mechanism in the storage position is stopped in the ascending process from the lowest position. Thereby, in the gear drive part of the raising / lowering mechanism in the storage position, play due to backlash between the gears in the upward direction can be eliminated. Therefore, the position in the ascending direction is determined at the storage position, and when the lifting platform is lifted from the storage position to the use position, the use position is not displaced.
Moreover, since the lifting mechanism at the storage position is in a state of being stopped in the ascending process, it is in a state of receiving a load applied to the lifting platform. Therefore, when starting to raise the lifting platform from the storage position to the use position, it is not affected by the backlash, the load or impact on the lifting mechanism is suppressed, and the lifting mechanism performs a smooth lifting operation. Can be done.
Moreover, since a recessed part is not formed by the descent | fall of a top plate at the time of use of a gas burner, a top plate is not overheated and the state of a fire can also be made easy to understand.

The gear-driven lifting mechanism includes a pantograph jack provided with a ball screw that is rotated by an electric motor and a link arm that is attached to the lifting platform and is assembled in an X shape to convert the rotational motion of the ball screw into a lifting motion. Preferably it is configured.
According to this, even if the driving force of the electric motor is relatively small, it is possible to smoothly raise and lower the lifting platform on which the weight of the gas burner or virtues is applied. Accordingly, it is possible to further suppress a load, an impact, and the like on the lifting mechanism at the start of the lifting, and it is possible to perform a smooth lifting operation by the lifting mechanism. In addition, the electric motor can be made small and the lifting mechanism can be made compact.

  As described above, according to the gas stove according to the present invention, even if a gear-driven lift mechanism is used to move the gas burner or the five virtues between the use position and the storage position, the use position is not displaced, and A smooth raising / lowering operation can be performed. Moreover, the top plate is not overheated during use of the gas burner, and the fire condition can be easily understood.

It is a perspective view which shows the external appearance structure of the gas stove which concerns on this embodiment. It is explanatory drawing which shows the state which assembled | attached the connection state of a gas burner and an instrument stopper, a gas burner, five virtues, and a burner ring to a support member. It is sectional drawing which shows the state which has a gas burner and virtues in a use position (the highest rise position of a lifting platform). It is sectional drawing which shows the state in which the raising / lowering stand 81 exists in the lowest position. It is sectional drawing which shows the state which has a gas burner and five virtues in a storage position. It is sectional drawing which shows the state which has a gas burner and five virtue in a cover body removal position.

Embodiments will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the gas stove 1 according to the present embodiment is applied to a built-in type, and the stove of the gas stove 1 having a plurality of gas burners 2 in a rectangular box-shaped cabinet C whose upper side is opened. The main body 11 is accommodated. The upper open portion of the stove main body 11 is covered with a top plate 12 made of glass or enamel, and the gas burner 2 and the five virtues 3 are arranged in each opening 12a formed at a plurality of predetermined positions on the top plate 12. The The gas stove 1 may be provided with one gas burner.

  As shown in FIG. 2, the gas burner 2 and the virtues 3 are arranged on the lift table 81, and the lift table 81 is lifted and lowered by a gear-driven lift mechanism 8 (see FIG. 3). The upper part is configured to be disposed at a use position where the upper part is located above the top plate 12 and a storage position where the gas burner 2 and the virtues 3 are stored in the stove main body 11. A cylindrical inner wall 12b having a height longer than the range of vertical movement of the gas burner 2 is formed below each opening 12a.

  The gas burner 2 includes a burner portion 21 and a mixing tube 24 that supplies the burner portion 21 with a mixed gas of gaseous fuel and air. The burner portion 21 includes a burner body 22 formed by an inner cylinder 22 a and an outer cylinder 22 b extending in the vertical direction, and a circular burner head 23 placed on the burner body 22, and an outer peripheral portion of the burner head 23. A number of flame holes 23a are formed. A downstream end of the mixing tube 24 is connected to the lower end of the burner body 22, and an ignition electrode and a flame detector (not shown) are externally attached around the burner body 22.

  A closing body 26 provided with a nozzle 25 serving as a gas jetting outlet is attached to the gas receiving port at the upstream end of the mixing tube 24, and a supply port 26 a for supplying primary air is formed in the closing body 26. ing. In addition, without providing the closing body 26, the clearance gap between the nozzle 25 and the gas receiving port of the mixing pipe 24 can also be used as the supply port to which primary air is supplied. A crank-shaped first connection pipe 41 is rotatably connected to the nozzle 25 via a first rotary joint 43, and a crank-shaped first connection pipe 41 is connected to the upstream end of the first connection pipe 41 via a second rotary joint 44. The second connection pipe 42 is rotatably connected. The upstream end of the second connection pipe 42 is rotatably connected to a communication pipe 54 extending from the instrument plug 5 that controls the gas supply to the gas burner 2 via a third rotary joint 45. Therefore, even if the gas burner 2 is moved up and down, the first connecting pipe 41 and the second connecting pipe 42 are rotated via the first to third rotary joints 43 to 45, and therefore, from the instrument plug 5 to the mixing pipe 24. With the distance kept constant, the nozzle 25 can be held in a state of being arranged at the gas inlet of the mixing tube 24.

  A cylindrical support 17 is fixed on a lifting table 81 on which the gas burner 2 and the virtues 3 are arranged. The support 17 is composed of a cylindrical portion 17a and a ceiling portion 17b that closes the upper portion of the cylindrical portion 17a. Is done. The burner body 22 is fixed to the center hole formed at the center of the ceiling portion 17b in a state where the burner body 22 is inserted, and the burner ring 6 is fixed to the upper surface of the ceiling portion 17b with a bolt or the like. The burner ring 6 is installed such that no gap is formed between the peripheral edge of the opening 12a of the top plate 12. An annular step 62 for placing Gotoku 3 is formed on the outer periphery of the upper surface of the burner ring 6, and Gotoku 3 is attached to the burner ring 6. The five virtues 3 have an annular five virtue frame 31 that is detachably fitted to the annular step portion 62 of the burner ring 6 and a plurality of five virtue claws 32 that project from the five virtue frame 31 at equal intervals. The five virtue claws 32 are formed to be higher than the burner head 23 of the gas burner 2. Thereby, even if the gas burner 2 is moved up and down, the gas burner 2 and the five virtues 3 are arranged on the lift table 81 in a state in which the height positional relationship is kept constant. Therefore, when the gas burner 2 is used, a good combustion state can be ensured.

  In the inner cylinder 22a of the burner body 22, a pan bottom temperature sensor 71 (cooking container temperature detecting means) for detecting the bottom temperature of the cooking container A is provided. The pan bottom temperature sensor 71 is attached to the support 17 in a state in which a shaft portion 71a provided with a heat-sensitive portion 71b at the tip is biased upward by a biasing means such as a spring, and the cooking container A is mounted on the virtues 3. If it puts, it will be in the state where the upper heat sensitive part 71b was pressed by the pan bottom, and it is constituted so that the pan bottom temperature may be detected. In addition, the pan bottom temperature sensor 71 is provided with an object detection means 72 constituted by a micro switch or the like that is turned on when a projection provided on a vertically movable shaft 71a is lowered to a predetermined position. When an object such as a cooking container A is placed on the virtues 3 by the object detection means 72, an on signal is output by the lowering of the shaft portion 71a, and the cooking containers A and the like on the virtues 3 are output by turning on and off the signal. The presence or absence of an object is detected.

  As shown in FIG. 3, the gear-driven lifting mechanism 8 is configured by a pantograph jack attached below the lifting table 81, and the pantograph jack is fixed to a plate-like shape fixed to the bottom surface of the stove main body 11. It is disposed between the member 82 and the elevator table 81. In the link arm 83 constituting the pantograph jack, one pantograph mechanism 84 is constituted by the four link arms 83, and the two pantograph mechanisms 84 are arranged on the fixing member 82 so as to face each other.

  In the pantograph mechanism 84, two link arms 83 are overlapped in an X-shape, and the center portion in the longitudinal direction is rotatably supported by the end portion of the shaft 85a. A two-stage pantograph mechanism 84 is configured by connecting the ends in the longitudinal direction of 83 with the end of the other X-shaped link arm 83 and the end of the shaft 85b. Two pantograph mechanisms 84 are arranged opposite to each other and connected to each other by shafts 85a and 85b. And the edge part of the remaining four link arms 83 of an upper side edge part and a lower side edge part is connected by the axis | shaft 85c.

  One shaft 85c that connects the lower end portions of the link arm 83 is fixed to a pair of lower guide plates 86 provided on the fixing member 82 by bolts 87, and the other lower shaft 85c has both ends thereof. The inside of the lower guide hole 86a can be slid in the horizontal direction by fitting into a lower guide hole 86a made of a long hole formed in the lower guide plate 86. In addition, one shaft 85c that connects the upper end of the link arm 83 is fixed to a pair of upper guide plates 88 attached to the lower surface of the elevator 81 with bolts 87, and the other upper shaft 85c Both end portions are fitted into an upper guide hole 88a formed of a long hole formed in the upper guide plate 88, and the inside of the upper guide hole 88a can be slid in the horizontal direction. The shafts 85c fixed to the upper and lower guide plates 86 and 88 are fixed at the same position in the vertical direction.

  In addition, an insertion hole through which the ball screw 89 is inserted is formed in the central portion in the axial direction of each shaft 85b. The insertion hole of one of the shafts 85 b arranged on the tip side of the ball screw 89 (the sliding shaft 85 c side) is formed with a screw hole that meshes with the screw of the ball screw 89. The other shaft 85 b disposed on the base end side of the ball screw 89 is provided with a stopper 89 a that prevents the ball screw 89 from moving in the axial direction. In addition, an electric motor 80 capable of forward and reverse rotation is connected to the base end portion of the ball screw 89. When the electric motor 80 is driven and the ball screw 89 is rotated, the shaft 85b having a screw hole approaches and separates from the other shaft 85b by the action of the ball screw 89, and the elevating platform 81 is moved up and down by the pantograph mechanism 84. .

  In this way, the gear-driven lifting mechanism 8 is configured to be able to lift and lower the lifting platform 81 between the highest position and the lowest position. The most elevated position is a position where the elevator 81 is raised to a position where the outer peripheral edge of the burner ring 6 coincides with the opening 12 a formed in the top plate 12, and is the use position of the gas burner 2. The lowest position is a position where the elevator 81 is lowered to a position where the five virtue claws 32 of the five victories 3 arranged on the burner ring 6 are arranged below the top plate 12, and the storage positions of the gas burner 2 and the five victories 3 It is a position below. An upper microswitch 91 and a lower microswitch 92 that are turned on and off by the movement of the lifting mechanism 8 are provided in the stove body 11, and the highest position is detected by an on signal from the upper microswitch 91. The lowest position is detected by the ON signal of the switch 92. A scale sensor 93 for finely detecting the position while the elevator 81 is moving up and down is provided on the stove body 11. The upper microswitch 91, the lower microswitch 92, and the scale sensor 93 constitute the position detecting means 9.

  On the front side of the top plate 12 (the standing position side of the user), a touch operation type operation unit 12c is provided corresponding to each gas burner 2 (see FIG. 1). Each operation unit 12c is provided with a lift switch (not shown) for performing the above-described lift operation of the gas burner 2. Although not shown, on the top surface of the top plate 12, a power switch, a point fire switch for igniting and extinguishing the gas burner 2 corresponding to each gas burner 2, and a burner for adjusting the combustion amount of the gas burner 2 A thermal power adjustment switch and the like are also provided. And the command information according to the touch operation of each switch (for example, the command information by the electric signal of the touch switch such as the capacitance type) is input to the control unit 10 (see FIG. 3) provided in the gas stove 1. . Detection signals from the object detection means 72 and the position detection means 9 are also input to the control unit 10.

  And the control part 10 controls the raising / lowering mechanism 8 to raise / lower the raising / lowering stand 81 in which the gas burner 21 and Gotoku 3 are arrange | positioned by operating the raising / lowering switch, and the upper part of the burner part 21, and Gotoku 3 Is placed in a use position (see FIG. 3) in which the top plate 12 protrudes above the top plate 12 and a storage position (see FIG. 5) in which the burner portion 21 and the virtues 3 are non-projected with respect to the top plate 12. Let The operation by the control unit 10 will be described below.

  First, when the raising / lowering switch of the operation unit 12c is turned on at the use position of the gas burner 2 shown in FIG. 3, the electric motor 80 is driven in the forward rotation direction, the ball screw 89 is rotated forward, and the pantograph mechanism 84 is lowered. By doing so, the elevator 81 that was at the highest position is lowered. When the object detection means 72 provided in the pan bottom temperature sensor 7 detects the presence of an object such as the cooking container A on the virtues 3 at the start of the lowering operation of the elevator 81 or during the lowering operation, the electric motor 80 is turned on. The drive is stopped and the lowering operation of the lifting platform 81 is stopped. This prevents the cooking container A or the like placed on the Gotoku 3 from being turned over. At this time, if the object such as the cooking container A is retreated from the top of Gotoku 3 and the lift switch is turned on again, the above-described lowering operation is resumed.

  Then, as shown in FIG. 4, when the lifting platform 81 reaches the lowest position, the lower micro switch 92 is turned on. Then, the rotation of the electric motor 80 is switched from the normal rotation direction to the reverse rotation direction, the ball screw 89 is rotated in the reverse direction, the pantograph mechanism 84 is raised, and the lifting platform 81 is raised. Then, as shown in FIG. 5, when the scale sensor 93 detects that the lifting / lowering table 81 has been slightly raised (for example, about 5 mm) from the lowest position, the lifting / lowering table 81 has reached the storage position of the gas burner 2. Judgment is made and driving of the electric motor 80 is stopped.

  In this storage position, the gas burner 2 and the virtues 3 are stored in the stove main body 11 so as to be positioned below the top plate 12. And when it exists in the state of this accommodation position, it covers the opening part 12a of the top plate 12 with the cover body 18 formed with the designed transparent glass. Thus, when the gas burner 2 is not in use, the gas burner 2 and the virtues 3 are housed in the stove body 11 and the opening 12a of the top 12 is closed with the lid 18 so that the top 12 can be widely used as a cooking table. It can be used effectively, and dust and dirt can be prevented from entering the storage space in the opening 12a. When the lifting / lowering base 81 reaches the storage position of the gas burner 2, a buzzer or the like is notified by a command from the control unit 10, and the arrangement of the lid 18 in the opening 12 a is urged to prevent forgetting to place the lid 18. It may be. Further, the fact that the lid 18 is disposed in the opening 12 a can be detected by the object detection means 72 provided in the pan bottom temperature sensor 7 pushed down by the lid 18.

  Next, when the raising / lowering switch is turned on at the storage position of the gas burner 2 shown in FIG. 5, the electric motor 80 is driven in the reverse direction, the ball screw 89 is rotated in the reverse direction, and the pantograph mechanism 84 is raised. The lifting / lowering base 81 that was in the storage position raised from the lowest position is raised. At this time, based on the position detection result of the scale sensor 93, as shown in FIG. 6, an interval is formed between the bottom surface of the lid 18 and the top plate 12 so that a finger can be put on the lid 18. When the lifting platform 81 is raised to the lid removal position, the drive of the electric motor 80 is stopped to temporarily stop the lifting. In this way, by lifting and stopping the lifting platform 81 once at the lid removal position, the lid 18 can be easily removed from the opening 12a, and the cooking container A or the like is placed on the lid 18. In such a case, the cooking container A or the like can be removed from the lid 18 before the cooking container A or the like is turned over. In addition, when the lifting platform 81 is once lifted and stopped at the lid removal position, a buzzer or the like may be notified.

  Then, when the lid 18 is removed from the top of the virtues 3 based on the detection result of the object detection means 72, the lifting platform 81 starts to rise automatically or by turning on the lifting switch again. In addition, after this, when the thing detection means 72 provided in the pan bottom temperature sensor 7 detects the presence of an object such as the cooking container A on the virtues 3 until the lifting / lowering base 81 reaches the highest position, The drive of the electric motor 80 is stopped and the raising operation of the lifting platform 81 is stopped. This prevents the cooking container A or the like placed on the Gotoku 3 from being turned over. At this time, if the object such as the cooking container A is withdrawn from the top of Gotoku 3 and the lift switch is turned on again, the ascending operation is resumed. Then, as shown in FIG. 3, when the lifting platform 81 reaches the highest position and the upper micro switch 91 is turned on, it is determined that the lifting platform 81 has reached the use position of the gas burner 2, and the electric motor 80 Stop driving.

  As described above, according to the gas stove 1 of the present embodiment, when the control unit 10 controls the lifting mechanism 8 to move the lifting platform 81 from the use position to the storage position, the lifting platform 81 is moved from the storage position. Also, the control is performed such that it is lowered to the lowest lowered position (FIG. 4) and then raised to stop at the storage position (FIG. 5). As a result, the ball screw 89 and the pantograph mechanism 84 that constitute the elevating mechanism 8 in the storage position are stopped in the ascending process from the lowest position. Accordingly, in the ball screw 89 and the gear drive portion of the pantograph mechanism 84 in the storage position, play due to backlash between the gears in the upward direction can be eliminated. Therefore, the position in the ascending direction is determined at the storage position, and when the elevating table 81 is raised from the storage position to the use position, the use position is not displaced. Moreover, since the ball screw 89 and the pantograph mechanism 84 that constitute the lifting mechanism 8 at the storage position are stopped in the ascending process, the load applied to the lifting platform 81 is received. Therefore, when starting to raise the lifting / lowering base 81 from the storage position to the use position, it is not affected by the backlash, and the load or impact on the lifting / lowering mechanism 8 is suppressed. The ascending operation can be performed.

  Further, the gear-driven lifting mechanism 8 is constituted by a pantograph jack including a link arm 83 assembled in an X shape that converts the rotational motion of the ball screw 89 into the lifting motion, so that the electric motor 80 that drives the ball screw 89 is provided. Even if the driving force is relatively small, it is possible to smoothly raise and lower the lifting platform 81 on which the weight of the gas burner 2 or the virtues 3 is applied. Accordingly, it is possible to further suppress a load, an impact, and the like on the lifting mechanism 8 at the start of the lifting, and the lifting mechanism 8 can perform a smooth lifting operation. In addition, the electric motor 80 can be made smaller and the lifting mechanism 8 can be made compact.

  Further, when the gas burner 2 is used, no depression is formed by the lowering of the top plate 12, so that the top plate 12 is not overheated and the state of the fire can be easily understood, and the gas burner 2 is used. When not, the top plate 12 can be used effectively as a cooking table. Furthermore, the appearance of the entire gas stove is good regardless of the usage state of the gas burner 2.

In addition, this invention is not limited to the said embodiment, A various change can be given within the scope of the present invention.
For example, in the present embodiment, the elevating mechanism 8 is configured to drive the pantograph mechanism 84 by the action of the ball screw 89, but includes a rack formed integrally with the elevating base 81 and a pinion gear meshing with the rack. Various gear-driven lifting mechanisms may be employed.

  In the above embodiment, the mixing tube 24 of the gas burner 2 and the instrument plug 5 are always connected by the upper and lower crank-shaped connection pipes and a plurality of rotary joints. A connecting pipe of the type is connected to the instrument plug 5, the nozzle of this connecting pipe and the gas receiving port of the mixing pipe 24 are separated, and the nozzle is guided so that the mixing pipe 24 is arranged at the set position. A member may be provided, and when the mixing tube 24 rises to the use position based on the detection result of the position detecting means 9, the nozzle of the communication tube is arranged at the center position of the gas inlet of the mixing tube 24. You may control so that it is. Further, a metal flexible pipe may be used instead of the crank-shaped connecting pipe.

  Further, in order to easily recognize the lifting operation of the lifting platform, a lamp that is lit during the lifting may be provided on the inner wall 12b formed in the opening 12a of the top plate 12.

  Further, in the present embodiment, the burner body 22, the burner ring 6, and the support body 17 of the burner portion 21 are separated from each other. However, the burner body 22 and the burner ring 6 may be formed integrally or burner ring. 6 and the support 17 may be formed integrally, the burner body 22 and the support 17 may be formed integrally, or all may be formed integrally. Moreover, although the support body 17 integrally formed the cylinder part 17a and the ceiling part 17b, you may form each separately.

DESCRIPTION OF SYMBOLS 1 Gas stove 2 Gas burner 3 Gotoku 8 Lifting mechanism 9 Position detection means 10 Control part (control means)
DESCRIPTION OF SYMBOLS 11 Stove body part 12 Top plate 12a Opening part 18 Cover body 21 Burner part 71 Pan bottom temperature sensor (cooking container temperature detection means)
72 Object detection means 72
80 Electric motor 81 Lifting table 83 Link arm 84 Pantograph mechanism 89 Ball screw 91 Upper micro switch 92 Lower micro switch 93 Scale sensor A Cooking container

Claims (2)

In the gas stove where the gas burner and the five virtues are arranged at the opening of the top plate arranged at the top of the stove body,
A lifting platform on which a gas burner and five virtues are arranged via a support;
The upper and lower parts of the virtues and gas burner are vertically moved up and down to the use position where the opening is closed by the support, and the storage position where the gas burner and virtues are stored in the stove body. A gear-driven lifting mechanism,
Control means for controlling the lifting operation of the lifting mechanism,
When controlling the lifting mechanism to move the lifting platform from the use position to the storage position, the control means lowers the lifting platform to the lowest position below the storage position and then raises the lift platform from the lowest position. A gas stove configured to stop at the storage position without any play between the gears in the ascending process, and to perform control to stop the lift platform from the storage position to the use position without causing a position shift. . The gas stove according to claim 1, wherein
The gear-driven lifting mechanism includes a pantograph jack provided with a ball screw that is rotated by an electric motor and a link arm that is attached to the lifting platform and is assembled in an X shape to convert the rotational motion of the ball screw into a lifting motion. Composed gas stove.

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