JPH0676471U - Low tank handle device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a handle device for a low tank, which ensures a discharge operation during heavy-duty cleaning. [Structure] The motor 20 and the recess 2 are provided on the side surface of the low tank 10.
2, a drive mechanism for the shaft 44 including the worm wheel 24, the inter gear 30, the toothless gears 32 and 36, etc. is provided, and the handle 50 is attached to the shaft 44. In the final state of meshing of the tooth-chipped gears 32 and 36, the rearmost side of the tooth row of the tooth-chipped gear 36 is engaged with the teeth of the drive-side tooth-chipped gear 32, and the driven-side tooth-chipped gear 36 is no longer in contact with the teeth. It is in a state where it cannot rotate. At this time, the shaft 44 (and the handle 50 and the driven side partly toothless gear 34) is held in a state of being rotated by about 90 ° for a while. [Effect] Since the float valve is kept raised to the ascending limit by the motor for a while, it is possible to reliably discharge most of the water in the raw tank when cleaning the toilet bowl for so-called heavy use.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a handle device of a low tank for supplying flush water to a toilet bowl, and more particularly to a handle device of a low tank configured to start water outflow from the raw tank by both manual operation and switch operation.

[0002]

[Prior art]

 A conventional example of a handle device for a low tank of this type is disclosed in Japanese Patent Publication No. 1-18218. In this conventional low tank handle device, a thin rod-shaped second shaft is slid on a cylindrical first shaft for raising a valve (water discharge control valve at the bottom of the low tank) rotated by a manual handle. The second shaft is rotatably fitted inside, the second shaft is rotated by a motor outside the tank, and the valve can be pulled up by the rotation of the second shaft. An arm member is provided so as to project in the radial direction with respect to the shaft, the upper end of the chain is connected to the tip of the arm member, and the valve is connected to the lower end of the chain.

[0003]

[Problems to be solved by the device]

 In Japanese Examined Patent Publication No. 1-18218, after the tip of the arm member is lifted to the upper limit, the arm member is immediately lowered. When the upper limit staying time of the arm member tip is short in this way, the valve may immediately sit again on the valve seat due to the water flow discharged from the raw tank.

[0004]

[Means for Solving the Problems]

 A handle device for a low tank according to claim 1, wherein a tip side projects out of the side wall of the low tank, a rear end side is located inside the low tank, and a shaft for connecting a linear body for valve pulling up is connected to the rear end side. A handle device for a low tank, comprising: a handle for turning a shaft fixed to a tip of a shaft; and a shaft electric device having a motor and a power transmission mechanism for transmitting the rotation of the motor to the shaft. The transmission mechanism is provided with a driven-side tooth-missing gear that interlocks with the shaft and a drive-side tooth-missing gear that interlocks with the motor. The shafts are allowed to idle by non-meshing of the gear tooth groups, and the last tooth in the gear rotation direction of the tooth row of the driven side partially toothed gear has finished meshing with the tooth group of the drive side partially toothed gear. End A predetermined time from the time and is characterized in that a holding device for holding the attitude of the driven-side driven gear on the attitude of 該噛 engagement completion time.

According to a second aspect of the present invention, in the handle device for a low tank according to the first aspect, the holding device is a tooth on the rear side in the gear rotation direction of the tooth row of the drive side toothless gear, and the tooth on the rear side is, It is characterized in that it comes into contact with the rearmost tooth of the tooth row of the driven side partially toothed gear after the end of the meshing.

According to a third aspect of the present invention, in the handle device for a low tank according to the first aspect, the holding device includes a tooth on the rear side in the gear rotation direction of the tooth row of the drive side toothless gear and the driven side toothless gear. And a concave peripheral surface which is provided continuously to the rearmost end of the tooth row in the gear rotation direction and which engages with the tooth crests of the trailing teeth of the drive side toothless gear after the end of the meshing. It is characterized by.

According to a fourth aspect of the present invention, in the handle device for a low tank according to the first aspect, the holding device is provided subsequent to the rearmost tooth in the gear rotation direction of the tooth row of the drive side partially toothed gear. Of the arm of the drive side partly toothed gear after the end of the meshing is provided on the driven side partly toothed gear and the trailing end of the gear row of the tooth row in the gear rotation direction. It is characterized by comprising a concave peripheral surface that engages with the tip surface.

According to a fifth aspect of the present invention, in the handle device for a low tank according to the first aspect, the holding device is provided subsequent to the rearmost tooth in the gear rotation direction of the tooth row of the drive side partially toothed gear, The first arm extending in the radial direction and the driven-side tooth-missing gear are provided so as to be connected to the rearmost end of the tooth row in the gear rotation direction. It is characterized by comprising a second arm that engages with the tip end portion of the first arm.

[0009]

[Action]

 In the handle device of the low tank of the present invention, water can be drained from the low tank by turning the handle by hand and driving the motor by switch operation.

In the case of the present invention, when the valve is pulled up by the switch operation, the valve is held for a predetermined time in the ascending limit stay time by the action of the holding device.

Therefore, when the water in the low tank is discharged for so-called heavy use, the valve is surely opened, and a sufficient amount of water is discharged to the toilet bowl.

[0012]

【Example】

 Embodiments will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a handle device for a low tank according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a main part of the device, and FIG. 3 is a side view for explaining a state where a housing cover is removed. FIG. 4 is a perspective view for explaining the cam switch mechanism, FIG. 5 is an exploded perspective view for explaining the handle return mechanism, FIG. 6 is a front view for explaining the meshing state of the toothless gear, and FIG. 7 is an electric circuit diagram. Is.

First, the structure of the handle device will be described with reference to FIGS. An opening 12 (FIG. 3) is provided on the side wall surface of the raw tank 10, a screw column 14 is inserted into the opening 12, and a nut 16 is screwed into the screw column 14, whereby the handle device is fixed to the raw tank 10. ing. The threaded column 14 is provided so as to project from the back surface of the housing plate 18, and a male screw is engraved on the outer peripheral surface thereof.

As shown enlarged in FIG. 2, a motor 20 is mounted on the housing plate 18, and a worm 22 fixed to a drive shaft of the motor 20 meshes with a worm wheel 24. A pinion 26 integral with the worm wheel 24 is pivotally supported on the housing plate 18 via a pivot 28. The pinion 26 meshes with the teeth of the inter gear 30 which has teeth all around. The inter-gear 30 and the drive-side tooth-chipped gear 32 integral with the inter-gear 30 are pivotally supported on the housing plate 18 by a pivot shaft 34.

The driven-side tooth-missing gear 36, which has teeth that can mesh with the teeth of the driving-side tooth-missing gear 32 on a part of the outer circumference, is integrated with a ring 38 and a ring plate 40, and their shafts are integrated. A central hole 42 is provided in the core portion. A shaft 44 is inserted through the center hole 42.

The shaft 44 has its tip end side projected through the threaded column 14 to the front face side of the housing plate 18, and further penetrates the partly tooth-missing gear 36, the ring 38 and the ring plate 40 to form a housing cover. It is inserted in a circular hole 48 of 46.

A handle 50 is arranged on the front surface side of the housing cover 46, and a recessed hole 54 provided in the shaft center portion of the boss portion 52 of the handle 50 is externally fitted to the tip of the shaft 44.

The tip of the shaft 44 is a non-circular portion 56 (FIG. 1) whose both side surfaces are cut off, and the inner peripheral surface of the concave hole 54 has a non-circular shape that engages with the non-circular portion 56. Has become. The screw 50 is screwed into the screw hole 60 on the tip end surface of the shaft 44 from the outside of the handle 50, so that the handle 50 and the shaft 44 are connected.

The boss portion 52 of the handle 50 is provided with a convex portion 62 (see FIG. 2) on the outer peripheral surface thereof, and the convex portion 62 forms the toothless gear 36, the ring 38 and the ring plate. It engages with a concave portion 64 provided on the inner peripheral surface of the central hole 42 of the boot 40. Due to the engagement of the convex portion 62 and the concave portion 64, the driven side toothless gear 36, the ring 38 and the ring plate 40 are always rotated together with the handle 50.

A notch portion 66 extending in an arc direction is provided on the outer peripheral surface of the ring plate 40, and step portions 68 and 70 on both end sides of the notch portion 66 are held by the housing cover 46. Engaged with the pins 76, 78 of the sliders 72, 74 being mounted.

As shown in an enlarged view in FIG. 5, two annular portions 78 and 80 are coaxially projected from the inner surface of the housing cover 46, and the slider is provided in the circular groove 82 between them. 72 and 74 are inserted. Each of the sliders 72 and 74 has an arc shape, and has slits 84 and 86 extending in an arc shape in the longitudinal direction thereof. The sliders 72, 74 are inserted into the groove 82 so that the slits 84, 86 engage with the pins 88, 90 projectingly provided in the groove 82. They are connected by a tension coil spring 92.

Since the step portions 68 and 70 of the cutout portion 66 of the ring plate 40 are engaged with the pins 76 and 78 of the sliders 72 and 74, when the ring plate 40 rotates clockwise in FIG. The slider 72 moves in the groove 82 in the clockwise direction while stretching the tension coil spring 92. When the force applied to the ring plate 40 is released, the tension of the spring 92 restores the slider 72 to its original state, and the ring plate 40 also returns to its original posture. On the contrary, when the ring plate 40 rotates counterclockwise in FIG. 5, the step 70 pushes the pin 78 to pull the slider 74 counterclockwise, and the slider 74 stretches the spring 92 to counterclockwise. It moves in the groove 82 in the circumferential direction. When the force applied to the ring plate 40 is released, the tension of the spring 92 returns the slider 74 to its original position, and the ring plate 40 also returns to its original position.

A step portion 94 is provided at an intermediate portion in the longitudinal direction of the shaft 44, and a spring 96 is externally fitted to a small-diameter portion on the tip side of the step portion 94. As shown in FIG. 3, a step portion 98 is also provided in the middle of the center hole of the threaded column 14, and the spring 96 is interposed between the step portions 94 and 98.

A rear end side of the shaft 44 is bent into an L shape to form an arm portion 44a, and a linear body 100 such as a chain for pulling up a float valve is connected to a tip portion of the arm portion 44a. Has been done.

As shown in FIGS. 3 and 4, a cam 102 is provided on the back surface of the inter gear 30. The cam 102 has a ring shape, and a recess 104 is provided in a part of the outer peripheral surface thereof. A switch 110 whose contacts 106 and 108 are brought into contact with or separated from each other by the cam 102 is attached to the housing plate 18. As shown in FIG. 4B, when the recess 104 faces the contacts 106 and 108, the contacts 106 and 108 are separated from each other. When the recess 104 is separated from the contacts 106 and 108, the contacts 106 and 108 are brought into contact with each other as shown in FIG.

A lead wire 112 connected to the switch 110 and the motor 20 is drawn out of the housing through an opening 114 of the housing cover 46, and is connected to a power source and a push button switch. As shown in FIG. 7, a switch 110 and a push button switch 118 are installed in parallel between the motor 20 and the power supply 116.

The operation of the handle device of the low tank configured as above will be described below. When water is stored in the raw tank 10, the arm portion 44a of the shaft 44 faces downward, and the linear body 100 such as a chain is in a slackened state. In this case, the float valve closes the outlet at the bottom of the raw tank 10. In this water storage state, the partly tooth-missing gears 32 and 36 are in the state shown in FIG. 6 (a). That is, the tooth-missing portion 112 of the drive-side tooth-missing gear 32 faces the driven-side tooth-missing gear 36. In the driven toothless gear 36, one end side of the tooth row faces the toothless portion 112. The switch 110 is in the state shown in FIG. 4 (b) and is in the switch-off state.

When the push button switch 110 is pushed in this state, the motor 20 rotates. Then, the rotational power is transmitted in the order of the worm wheel 24, the pinion 26, the inter gear 30, and the drive side toothless gear 32, and the teeth of the toothless gear 32 mesh with the teeth of the driven side toothless gear 36.

By the way, when the inter gear 30 rotates even a little, the recess 104 moves away from the switch 110 as shown in FIG. 4A, and the contacts 106 and 108 come into contact with each other. Therefore, even if the hand is released from the push button switch 118, the power is supplied from the power source 116 to the motor 20 through the switch 110, and the rotation of the motor 20 is continued.

As the motor 20 continues to rotate, the tooth-missing gears 32 and 36 mesh with each other as shown in FIG. 6B, and the tooth-missing gear 36 rotates. With the rotation of the partly tooth-missing gear 36, the handle 50 is rotated by the engagement relationship between the concave portion 64 and the convex portion 62 (FIG. 2). The shaft 44 is rotated by the rotation of the handle 50. When the shaft 44 rotates, the linear body 100 is pulled up, the float valve is raised, and water is discharged from the raw tank 10 toward the toilet bowl.

From FIG. 6 (b) to FIG. 6 (c), the rotation of the motor 20 is continued, the toothless gear 36 is further rotated in the clockwise direction, and the state of FIG. 6 (c) is reached. . In the states of FIGS. 6C to 6D, the rearmost side of the tooth row of the tooth-chipped gear 36 is engaged with the teeth of the drive-side tooth-chipped gear 32, and the driven-side tooth-chipped gear 36 is no longer in contact therewith. The above rotation cannot be performed. At this time, the shaft 44 (and the handle 50, the driven side partly toothless gear 34) is held for a while in a state of being rotated by about 90 °.

Incidentally, as the driven side partly tooth-missing gear 36 rotates clockwise, the slider 74 (FIGS. 2 and 5) also moves in the groove 82 in the same direction via the pin 78. As the slider 74 moves, the spring 92 is stretched. The stretched spring 92 serves as a power source at the time of returning rotation shown in FIG. 6 (e) later.

The motor 20 and the tooth-chipped gear 32 continue to rotate even in this state, and finally reach the state shown in FIG. 6D, and the rearmost part of the tooth row of the tooth-chipped gear 32 has the tooth-chipped gear 36. When the tooth missing portion 112 faces away from the tooth missing gear 36, the driven tooth missing gear 36 rotates counterclockwise as shown in FIG. 6 (e). It will be in an acceptable state. As shown in FIG. 5, the ring plate 40 integral with the driven toothless gear 36 is biased in the counterclockwise direction of FIG. 6 by the tension coil spring 92 via the slider 74. Therefore, as soon as the engagement of the tooth rows of the toothless gears 32 and 36 is released, the driven side toothless gear 36 starts rotating in the counterclockwise direction in FIG. This rotation is transmitted to the shaft 44 via the handle 50, the shaft 44 returns to the state shown in FIGS. 1 and 3 (the state in which the arm portion 44a hangs down), and the partly tooth-missing gear 36 is shown in FIG. It returns to the state shown in a).

In the state shown in FIG. 6 (e), the inter gear 30 is rotated to the state shown in FIG. 4 (b), and the contacts 106 and 108 of the switch 110 are open. Therefore, the motor 20 is stopped in the state shown in FIG. 6 (e) and the state shown in FIG. 6 (e).

As described above, between FIG. 6 (c) and FIG. 6 (d), the arm portion 44a of the shaft 44 keeps the linear body 100 pulled up to the highest position. Therefore, during this period, the float valve is pulled up sufficiently, and even if the arm portion 44a of the shaft 44 returns to the state shown in FIGS. 1 and 3 thereafter, the float valve is in the floating state. Then, most of the water in the raw tank 10 is discharged toward the toilet bowl.

The above-described operation is performed when the handle device is switched to release most of the water in the low tank 10. However, in the present embodiment, the water in the low tank 10 can also be discharged by manually operating the handle 50. Most can be released. That is, when the handle 50 is rotated to the left (clockwise direction), only the toothless gear 36 rotates clockwise together with the shaft 44 in the state of FIG. 6 (a). As a result, the linear body 100 is pulled up, and the water in the raw tank 10 is discharged toward the toilet bowl according to a normal manual operation. At this time, the tooth-chipped gears 32 and 36 do not mesh at all, and the tooth-chipped gear 36 freely rotates from the drive-side tooth-chipped gear 32.

When a small amount of water is to be poured into the toilet bowl, such as when the Western-style toilet bowl is used for men's urine, the handle 50 is flipped up to the right. Then, the shaft 44 is rotated counterclockwise in FIG. 1, the linear body 100 is pulled up, and the water in the raw tank 10 is discharged. In this case, the handle 50 can rotate by an angle of about 45 °. That is, when the handle 50 is rotated, the ring plate 40 rotates integrally with the handle 50, and the slider 72 rotates in the clockwise direction in FIG. The slit 84 of the slider 72 extends over a circumferential range of about 45 ° with respect to the axis of the shaft 44, and when the slider 72 rotates about 45 °, the slit 84 has an end portion. The pin 88 abuts on the pin 88, and further rotation of the slider 72 is prevented. For this reason, the ring plate 40 and the handle 50 cannot be further rotated, and the float valve in the raw tank 10 is also in a slightly raised state. Therefore, when the handle 50 is subsequently released, the float valve is seated at the outlet of the bottom of the low tank by the water pressure and the water is stopped.

The handle device of the present embodiment can automatically discharge the water in the raw tank 10 by pressing the push button switch 118, and the handle 50 can be operated similarly to the conventional manual type low tank. It is also possible to release water by doing so. This handle 50 releases water by the same manual operation as the low tank handle that has been used for a long time. Moreover, the handle 50 has the same external shape as the old low tank handle. Even a person can discharge the water in the raw tank 10 by a manual operation without frustration.

Another example of the structure of a holding device for holding the driven side partially toothed gear at the end of meshing will be described with reference to FIGS.

In the holding device shown in FIGS. 8 and 9, a concave peripheral surface 130 is provided on the outer circumference of the driven side partly toothless gear 36 so as to be continuous with the rearmost end of the tooth row of the driven side partly toothless gear 36. . The operation of this holding device is as shown in FIGS. 9 (a) to 9 (e). The operation of FIGS. 9 (a) to 9 (e) is substantially the same as that of FIGS. 6 (a) to 6 (e), and the differences reside in (c) and (d). That is, when the driven-side tooth-missing gear 36 and the shaft 44 rotate to the state of FIG. 9C, the tooth on the rearmost side of the tooth row of the driving-side tooth-missing gear 32 becomes Engage 130. In the states of FIGS. 9 (c) to 9 (d), the concave peripheral surface 130 thus engages with the teeth of the drive side partly tooth-missing gear 32 to prevent rotation in the counterclockwise direction in FIG. Has been done. When the rearmost tooth of the tooth row of the drive-side tooth-chipped gear 32 passes through the concave peripheral surface 130, the driven-side tooth-chipped gear 36 returns and rotates counterclockwise as shown in FIG. 9 (e). To do.

In the holding device shown in FIGS. 10 and 11, a piece 134 having a concave peripheral surface 132 at its tip is provided on the driven side partly tooth-missing gear 36 so as to be movable back and forth in the radial direction. The piece 134 is housed in a radial groove 136 provided in the driven tooth-missing gear 36, and the groove 136 is covered with a cover 138. A coil spring 140 is arranged on the rear end side of the piece 134 and can bias the piece 134 in the radial direction.

The operation of this holding device is as shown in FIGS. 11 (a) to 11 (e). The operation shown in FIGS. 11 (a) to 11 (e) is almost the same as that shown in FIGS. 9 (a) to 9 (e), and the differences reside in (c) and (d). That is, when the driven side partly tooth-missing gear 36 and the shaft 44 rotate to the state of FIG. 11 (c), the tooth on the rearmost side of the tooth row of the driving side partly tooth-missing gear 32 becomes the concave peripheral surface 132 of the piece 134. Engage and push piece 134 into groove 136.

In the state shown in FIGS. 11C to 11D, the concave peripheral surface 132 thus engages with the teeth of the drive-side missing tooth gear 32, so that the counterclockwise direction in FIG. Rotation is blocked. When the rearmost tooth of the tooth row of the drive side partly toothless gear 32 passes through the concave peripheral surface 132, the driven side partly toothless gear 36 returns and rotates in the counterclockwise direction as shown in FIG. 11 (e). To do.

In the holding device shown in FIGS. 12 and 13, the first arm 146 is provided so as to project in the radial direction from the boss portion 144 which is integral with the drive side partly toothless gear 34. Further, a second arm 148 is provided so as to project in a radial direction from a ring 38 which is integral with the driven side toothless gear 36. The front end surface of the arm 146 is convexly curved, and the front end surface of the arm 148 is concavely curved. The arms 146 and 148 are provided at the rearmost portions of the toothless gears 32 and 36, respectively.

The operation of this holding device is as shown in FIGS. 13 (a) to 13 (d). 13 (a) and 13 (b) are similar to FIGS. 6, 9 and 11 (a) and (b), the tooth-missing gears 32 and 36 that were not initially meshed with each other are the tooth-missing gear 32. And the driven side partly tooth-missing gear 36 is driven to rotate. When the state shown in (c) is reached, the engagement of the tooth-missing gears 32 and 36 is released, but the arms 146 and 148 engage with each other, and the driven-side tooth-missing gear 36 holds the stopped state. When the arm 146 is disengaged from the arm 148 as the drive-side tooth-chipped gear 32 continues to rotate, the driven-side tooth-chipped gear 36 returns and rotates counterclockwise as shown in FIG. 13 (d).

In the holding device of FIGS. 14 and 15, the fan-shaped first arm 150 is projected from the boss portion 144 which is integral with the drive side tooth-chipped gear 32, and the ring 3 which is integral with the driven side tooth-chipped gear 36. A second arm 152 is provided so as to project from 8.

The operation of this holding device is as shown in FIG. 15. As shown in FIG. 15A, the tooth-missing gears 32 and 36, which were not meshed with each other in the initial stage, rotate the driving-side tooth-missing gear 32. As a result, the driven toothless gear 36 also rotates by meshing as shown in FIG. (C) As shown in the figure, the arms 150 and 152 engage after the engagement of the tooth-chipped gears 32 and 36 is completed, and only the drive-side tooth-chipped gear 32 continues to rotate between (c) and (d). Then, the driven toothless gear 36 holds the stopped state. (E) When the arm 150 passes over the tip of the arm 152 as shown in the figure, the driven side partly toothless gear 36 returns and rotates in the counterclockwise direction.

[0048]

[Effect of device]

 As described above, the handle device for the low tank of the present invention holds the water discharge control valve at the bottom of the rotor tank raised to the upper limit by the motor for a while, so that when cleaning the toilet bowl as a so-called general purpose, Most of the water can be reliably discharged.

Since the holding device is provided in the present invention, the valve can be reliably opened even if the voltage or frequency of the power source changes. In addition, even if the chain length varies, the valve can be reliably opened.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an apparatus according to an embodiment.

FIG. 2 is an exploded perspective view of a main part of the apparatus according to the embodiment.

FIG. 3 is a side view of a main part of the apparatus according to the embodiment.

FIG. 4 is a perspective view illustrating the operation of the switch 110 of the apparatus according to the embodiment.

FIG. 5 is an exploded perspective view of a main part of the apparatus according to the embodiment.

FIG. 6 is a front view for explaining the operation of the partly tooth-missing gear in the embodiment apparatus.

FIG. 7 is an electric circuit diagram of the apparatus of the embodiment.

FIG. 8 is a perspective view showing another holding device used in the present invention.

FIG. 9 is an operation explanatory view of the holding device in FIG.

FIG. 10 is a perspective view showing another holding device used in the present invention.

FIG. 11 is an operation explanatory view of the holding device of FIG.

FIG. 12 is a perspective view showing another holding device used in the present invention.

FIG. 13 is an operation explanatory view of the holding device of FIG.

FIG. 14 is a perspective view showing still another holding device used in the present invention.

FIG. 15 is an operation explanatory view of the holding device of FIG.

[Explanation of symbols]

 10 Low tank 20 Motor 22 Worm 24 Worm wheel 30 Intergear 32 Drive side toothless gear 36 Driven side toothless gear 44 Shaft 50 Handle 72, 74 Slider 84, 86 Slit 94, 98 Step 96 Spring 110 Switch 112 Missing tooth Part 130,132 Concave peripheral surface 134 Piece 146,148,150,152 Arm

Claims (5)

[Scope of utility model registration request] 1. A shaft, the tip side of which projects outside the side wall of the raw tank, the rear end side of which is located inside the raw tank, and which is connected to a linear body for valve pull-up at the rear end side, and which is fixed to the tip of the shaft. A handle for turning the shaft, a shaft electric device having a motor and a power transmission mechanism for transmitting the rotation of the motor to the shaft, and a handle device for a low tank comprising: A driven side toothless gear that interlocks and a drive side toothless gear that interlocks with the motor are provided, and the shaft is rotated by the meshing of the tooth group of these toothless gears. Allowing the shaft to idle by meshing, and the last tooth in the gear rotation direction of the tooth row of the driven side partially toothed gear has finished meshing with the tooth group of the drive side partially toothed gear for a predetermined time from the meshing end point. The subordinate Handle apparatus low tank, characterized in that a holding device for holding the attitude of Gawaketsuha gear position of 該噛 engagement completion time. 2. The holding device according to claim 1, wherein the holding device is a tooth on the trailing side in the gear rotation direction of a tooth row of the drive side toothless gear, and the tooth on the trailing side is the driven side after the end of the meshing. A handle device for a low tank, which comes into contact with a rearmost tooth of a tooth row of a toothless gear. 3. The holding device according to claim 1, wherein the holding device includes a tooth on a trailing side in a gear rotation direction of a tooth row of the drive side partly toothed gear and a trailing side tooth of the driven side partly toothed gear in a gear rotation direction last of the tooth row. A handle device for a low tank, comprising: a concave peripheral surface which is provided in series with the tail and which engages with the tooth crests of the rear tail teeth of the drive side toothless gear after the end of the meshing. 4. The arm according to claim 1, wherein the holding device is provided following the tooth at the rear end of the tooth row of the drive side partially toothed gear in the gear rotation direction and extends in the radial direction of the gear. And a concave circumference that is provided on the driven-side tooth-missing gear and is connected to the rearmost end of the tooth row in the gear rotation direction, and engages with the tip surface of the arm of the driving-side tooth-missing gear after the end of the meshing. A handle device for a low tank, which is characterized by comprising a surface and 5. The first holding device according to claim 1, wherein the holding device is provided subsequent to the last tooth in the gear rotation direction of the tooth row of the drive side partly toothed gear and extends in the radial direction of the gear. Of the first side arm of the drive side partly toothed gear after the end of the meshing. A handle device for a low tank, comprising: a second arm that engages with the second arm.