JPH04356112A - Side clutch of walking-type rice transplanter - Google Patents

Abstract

PURPOSE:To simplify the gyrating operation, etc., by actuating a change over valve in the case of shifting a side clutch lever beyond a clutch-disconnection position or returning the lever to a clutch-connection position. CONSTITUTION:An end of a changeover valve-operation wire 13a is fixed to a slit 24 above the connecting position of a side clutch-operation wire 23a of a side clutch lever 5. The side clutch is connected when the side clutch lever is released. When the lever is turned to a prescribed position, the side clutch is changed to disconnected state to operate a changeover valve. When the side clutch lever is turned beyond the disconnection position, the changeover valve is actuated to lower the driving wheel and lift the machine body. The changeover valve is returned to the original state by returning the side clutch lever to the connection position to lift the driving wheel and lower the machine body.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side clutch for a walk-behind rice transplanter, and more particularly to a side clutch in which a side clutch lever is used to raise and lower the traveling wheels at the same time as the clutch is operated.

0002

[Prior Art] Conventionally, a walk-behind rice transplanter has been equipped with a machine body equipped with running wheels that are raised and lowered by a hydraulic cylinder mechanism, a handle provided at the rear of the machine body, and a side clutch lever pivotally supported by the handle. generally known. In addition, in similar walk-behind rice transplanters, the wheel vertical adjustment device, which is configured to automatically adjust the wheels up and down in response to changes in mud pressure applied to the float, is configured to automatically lower or lower the wheels when the side clutch is disengaged. A structure in which only the fixation can be operated is shown in Japanese Utility Model Application Publication No. 56-8112, and a structure in which a lever for raising and lowering the wheels is attached to the grip part of the handle is shown in Japanese Utility Model Application Publication No. 59-87212. A marker that can be moved upward is provided, a stopper that prevents clutch operation is provided on the side clutch lever, and the stopper is interlocked with the marker that moves upward to the storage position to prevent the side clutch operation on the side of the marker that has moved upward. A structure configured to cancel the above is disclosed in Japanese Utility Model Application Publication No. 59-127411.

0003

[Problems to be Solved by the Invention] Incidentally, in each of the above-mentioned prior art walk-behind rice transplanters, in addition to the side clutch lever, an operating mechanism for operating and operating other mechanisms is provided. When turning on a headland, in addition to operating the side clutch lever, other operating mechanisms must also be operated, making the operation complicated. The present invention has been made to solve the above problems.

0004

[Means for Solving the Problems] In order to achieve the above objects, the present invention provides a machine body equipped with running wheels that are raised and lowered by a hydraulic cylinder mechanism, a handle provided at the rear of the machine body, and a pivot point attached to the handle. In a walk-behind rice transplanter equipped with a supported side clutch lever, the side clutch lever is in the clutch ``engage'' state when released, and the clutch is ``disengaged'' when the side clutch lever rotates to a predetermined position. The switching valve of the above hydraulic cylinder mechanism is connected to the clutch lever, and the side clutch lever is
When the side clutch lever is turned further from the clutch "on" position, the switching valve is activated to lower the traveling wheels, and when the side clutch lever is returned to the clutch "on" position, the switching valve is switched and the traveling wheels are raised. It is characterized by

[0005]

[Operation] With the above structure, the side clutch of the walk-behind rice transplanter of the present invention disengages when the side clutch lever is squeezed to the clutch "off" position, and the side clutch lever is rotated by squeezing the side clutch lever deeper than that position. When this happens, the switching valve operates and lowers the traveling wheels.
When the side clutch lever is returned to the clutch ``engage'' position, the switching valve is switched to raise the traveling wheels, so a single operation of the side clutch lever allows the clutch to be ``disengaged'' and the traveling wheels to be lowered. Also, the clutch ``engage'' operation and the traveling wheel lifting operation can be performed at the same time. Moreover, each of these operations can be performed consecutively.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to the accompanying drawings. The walking rice transplanter 1 shown in FIGS. 2 to 5 is equipped with an engine 2 and a transmission 3 at the front of the machine.
A handle 4 having grip portions 4a, 4a on the left and right is provided at the rear of the machine so as to be inclined rearward. Side clutch levers 5, 5 are pivotally supported below both grip portions 4a, 4a of the handle 4, respectively. A seedling stand 6 is provided on the upper side along the slope of the handle 4 so as to be reciprocated from side to side via a lateral movement mechanism 6a. The body between the engine 2, transmission 3, and handle 4 receives the power changed by the transmission 3, and has a base end connected to a balance mechanism 7.
Traveling wheels 8 are respectively pivotally supported at the distal end portions of a pair of left and right transmission cases 7 which are pivotally supported to be rotatable back and forth by a shaft a.

[0007] A center float 9 and side floats 10, 10 are supported on the lower side of the body by link mechanisms so as to be movable up and down within a predetermined range. A hydraulic system 11 is provided behind the engine 2, and this hydraulic system 1
1 hydraulic cylinder 12 is arranged to operate the balance mechanism 7a, and by switching the switching valve 13 of the hydraulic cylinder 12, the hydraulic cylinder 12 is telescopically operated and the transmission case 7 is rotated in the front and back direction, and the transmission case 7 is rotated in the front and rear direction. The support height of the aircraft body is changed by moving the wheels 8 up and down. Further, the switching valve 13 is connected to the center float 9 so as to be switched by the vertical movement of the center float 9, and during rice planting work, the traveling wheels 8 are automatically moved up and down relative to the vertical movement of the center float 9. , the planting depth of seedlings is kept almost constant.

A plurality of (four in this embodiment) seedling planting bodies 14 are provided opposite the inclined lower end of the seedling platform 6, and the seedlings placed on the seedling platform 6 are taken out one by one. It is ready to be planted in the field. Power is transmitted to the drive unit 15 of the seedling planting body 14 and the seedling platform 6 by a transmission frame 16 extending rearward from the transmission 3 and also serving as a main body frame. Also, on the lower back of the handle 4, a main clutch 17 that inputs and disengages power to the drive unit 15 of the running wheels 8, the seedling platform 6, and the seedling planting body 14 is connected to a main clutch 17 that is operated via an operating wire 17a. Clutch lever 18, seedling mounting stand 5, drive unit 15 for seedling planting body 14
A planting clutch lever 2 that operates a planting clutch 19 that turns on and off power to the plant via an operating wire 19a.
0, by switching the switching valve 13 of the hydraulic cylinder 12, the running wheels 8 are connected via the balance mechanism 7a and the transmission cases 7, 7.
.

As shown in FIG. 1, both side clutch levers 5 (only one is shown) are pivotally supported below both grips 4a of the handle 4, and are provided at the base ends of transmission cases 7, 7. An operation wire 23a is connected between the friction type side clutches 23, 23, respectively. An elongated hole 24 is bored above the position where the operating wire 23a of the side clutch lever 5 is connected, and the end of the operating wire 13a for switching and operating the switching valve 13 is connected to the elongated hole 24. .

When the side clutch lever 5 is in the released state, the side clutch 23 is "engaged," and when the side clutch 23 is rotated to a predetermined position, the side clutch 23 is "disengaged." Switch the switching valve 13 via the operating wire 13a connected to the
When the side clutch lever 5 is rotated further from the "off" position of the side clutch 23, the switching valve 13 is actuated to lower the traveling wheels 8, 8 and raise the aircraft, and the side clutch lever 5 is turned to the clutch "on" position. When the machine is returned to its original position, the switching valve 13 is switched to raise the traveling wheels 8, 8 and lower the machine body.

An extension frame 6b is provided at the inclined upper end of the seedling platform 6 so as to be movable between an extension position and a storage position. The balance mechanism 7a is provided with an inclination adjustment hydraulic cylinder 25 and a switching valve 26 that adjust the left and right inclination of the aircraft body by changing the ground height of the left and right running wheels 8, 8, so that the inclination of the aircraft body can be adjusted. At the same time, a pendulum type horizontal sensor 27 is attached to the switching valve 26 of the hydraulic cylinder 25 for adjusting the inclination.
are connected to each other, and the machine is automatically held in a horizontal position during rice planting work. Further, the transmission 3 is provided with a main transmission gear 28, a stock switching gear 29, and the like, each of which can be switched by a lever. The drive unit 15 of the seedling planting body 14 and the seedling platform 6 is provided with a gear 30 for switching the amount (number of seedlings) to be taken out. Note that the clutch lever portion 22 is provided with a marker switching device that switches a line marker (not shown) between an operating position and a storage position. The reference numeral 31 designates a spare seedling stand for placing spare seedlings, and the reference numeral 32 designates an accelerator lever of the engine 2.

[0012] In the walk-behind rice transplanter 1 of the embodiment constructed as described above, when the rice transplanter 1 is introduced into a paddy field and starts rice transplanting work, the hydraulic lever 21 is first pressed while the running wheels 8 are in contact with the tiller. Switch the center float 9 and side floats 10, 10 to support the aircraft by touching the rice field,
Next, the planting clutch lever 20 is put into the engaged state and the main clutch lever 18 is put into the engaged state, so that the machine runs, and the seedling platform 6 and the seedling planting body 14 are operated to perform the seedling planting work.

[0013] When the aircraft comes to the edge of the field and turns around the headland,
The worker grips and rotates the side clutch lever 5 on the side to be turned. Then, the operating wire 23a is first pulled and the side clutch 23 on the swing side is disconnected, and when the side clutch lever 5 is further rotated, the elongated hole 24 causes the operating wire 1 to be connected to the operating wire 1 with a slight time difference from the operating wire 23a.
3a is pulled to switch the switching valve 13, and at the same time the aircraft starts turning, the hydraulic cylinder 12 is extended and the transmission case 7 rotates, lowering the traveling wheels 8 and raising the aircraft. Therefore, in a state where the center float 9 and the side floats 10, 10 are separated from the field, only the other running wheel 8 is driven to rotate, and the machine body can turn smoothly. Incidentally, at the start of turning, the planting clutch lever 20 is operated to the disengaged state.

When the headland turn of the aircraft is completed and the side clutch lever 5 is released, the operating wire 13a and the operating wire 23a are sequentially returned to their original states by a spring (not shown), and the switching valve 13 , the traveling wheels 8 are raised and the aircraft is lowered, and the center float 9 and side floats 10, 10 touch the rice field.
The side clutch 23 is turned on to return to the state before turning, and the planting clutch lever 20 is turned on to restart the seedling planting work. Incidentally, depending on how tightly the side clutch lever 5 is gripped, only the engagement and disengagement of the side clutch 23 can be performed.

In the above embodiment, a case has been described in which the operating wire 13a for switching and operating the switching valve 13 is connected to the elongated hole 24 bored above the position where the operating wire 23a of the side clutch lever 5 is connected. However, instead of this operating wire 13a, an operating wire 17a for operating the main clutch 17, an operating wire 19a for operating the planting clutch 19, an operating wire for operating the marker switching device, etc. may be connected.

When the operating wire 17a for operating the main clutch 17 is connected to the elongated hole 24, when one of the side clutch levers 5, 5 is grasped and rotated, one of the side clutches 23, 23 is first moved. When the main clutch 17 is disconnected and the side clutch lever 5 is further rotated, the main clutch 17
is cut off and the machine body stops running, and at the same time, the operation of the drive unit 15 of the seedling mounting table 5 and the seedling planting body 14 is stopped. Therefore,
When the aircraft turns into a headland, when replenishing seedlings, or in an emergency, the aircraft can smoothly stop traveling and the seedling planting section can be stopped. In particular, when the machine is moving backwards, a strong upward force acts on the grips 4a, 4a of the handle 4, and the operator cannot take his hands off the grips 4a, 4a. When it is necessary to stop the running of the machine, the running of the machine is stopped simply by strongly grasping either side clutch lever 5, 5 without releasing the grips 4a, 4a.

When the operation wire 19a for operating the planting clutch 19 is connected to the elongated hole 24, when the aircraft is turning on a headland, when the side clutch lever 5 on the turning side is grasped and rotated, the When the side clutch 23 on the swing side is disengaged and the side clutch lever 5 is further rotated, the planting clutch 19 is disengaged and the driving of the seedling platform 5 and the seedling planting body 14 is stopped. And the hydraulic lever 21
is operated to switch the switching valve 13, and at the same time the aircraft starts turning, the hydraulic cylinder 12 is extended, the transmission case 7 rotates, the traveling wheels 8, 8 are lowered, and the aircraft is raised. rotate. When the rotation is completed, the planting clutch 19 is engaged by releasing the grip on the side clutch lever 5, and the seedling mounting table 5 and the seedling planting body 14 are engaged.
is driven, the side clutch 23 is connected, and the hydraulic lever 21 is operated to raise the running wheels 8, 8 and lower the machine body, and the seedling planting work is resumed.

When the operating wire of the marker switching device is connected to the elongated hole 24, when the aircraft is turning on a headland, when the side clutch lever 5 on the turning side is grasped and rotated, the side clutch 23 is first When the one on the swing side is disconnected and the side clutch lever 5 is further rotated, the marker switching device is actuated by the operating wire, and the line drawing marker that was in use until then is placed in the retracted state, and is used in the next seedling planting process. The delineation marker to be used is switched to be in use. Therefore, the operator does not forget to switch the marker switching device, and the operator can
You can turn the aircraft without taking your hands off the handle.

In another embodiment of the present invention shown in FIG. 6 and FIG. Consisting of a side clutch lever 5b,
A sub side clutch lever 5b is pivoted inside the main side clutch lever 5a, and the main side clutch lever 5a is gripped and rotated, and the sub side clutch lever 5b approaches the grip portion 4a, and further the main side clutch lever 5a is rotated. When rotated, the grip portion 4 of the secondary side clutch lever 5b
The surface facing a is in contact with the grip portion 4a, and the auxiliary side clutch lever 5b is rotated. Then, the side clutch 2 is connected to the main side clutch lever 5a.
The operation wire 23a of the switching valve 13 is connected to the auxiliary side clutch lever 5b.

[0020] In the walk-behind rice transplanter 1 of another embodiment having such a configuration, when carrying out the seedling planting work as in the case of the above embodiment, when the machine comes to the edge of the field and turns around the headland, the rice transplanter 1 performs the work. The person grips and rotates the main side clutch lever 5a on the side to be turned. Then, the secondary side clutch lever 5b
First, the operating wire 23a is pulled by the main side clutch lever 5a, the side clutch 23 on the rotation side is disconnected, and then the main side clutch lever 5
When a is rotated, the auxiliary side clutch lever 5b comes into contact with the grip portion 4a, and the auxiliary side clutch lever 5b is rotated, and the operation wire 13a is pulled with a slight time difference from the operation wire 23a, and the switching valve 13 is pulled. When the changeover is made and the aircraft starts turning, the hydraulic cylinder 12 is extended, the transmission case 7 rotates, the traveling wheels 8 are lowered, and the aircraft is raised. Therefore, in a state where the center float 9 and the side floats 10, 10 are separated from the field, only the other running wheel 8 is driven to rotate, and the machine body can turn smoothly. At this time, at the start of turning, the planting clutch lever 20 is operated to the disengaged state.

When the main side clutch lever 5a is released after the aircraft has completed the headland turn,
The auxiliary side clutch lever 5b is separated from the grip part 4a, the operating wire 13a and the operating wire 23a are returned to their original states in order by a spring (not shown), the switching valve 13 is switched, the traveling wheels 8 are raised, and the aircraft is lowered. The center float 9 and side floats 10, 10 come into contact with the rice field, the side clutch 23 is engaged to return to the state before turning, and the planting clutch lever 20 is engaged to resume seedling planting work. Note that the side clutch 23 can be engaged or
It is also possible to perform only a cutting operation.

In the other embodiment described above, the operating wire 23a is connected to the main side clutch lever 5a, and the operating wire 13 of the switching valve 13 is connected to the auxiliary side clutch lever 5b.
In the above description, the operation wire 13 of the switching valve 13 is connected to the auxiliary side clutch lever 5b.
Instead of a, similarly to the above embodiment, the operating wire 17a for operating the main clutch 17, the operating wire 19a for operating the planting clutch 19, the operating wire for operating the marker switching device, etc. may be linked. . Even when the operating wire 17a of the main clutch 17, the operating wire 19a of the planting clutch 19, or the operating wire of the marker switching device is connected to the auxiliary side clutch lever 5b, the auxiliary side clutch lever 5b The same effect as when connected to the elongated hole 24 is performed. In FIG. 7, reference numeral 33 is an operation wire for operating the marker switching device, and 34 is a lock wire for the balance mechanism 7a.

[0023]

[Effects of the Invention] As explained above, according to the side clutch of the walk-behind rice transplanter of the present invention, when the side clutch lever is grasped and rotated to the clutch "disengage" position, the clutch is disengaged, and the clutch is disengaged even deeper than that position. When you squeeze and rotate the side clutch lever, the switching valve is activated to lower the traveling wheels and raise the aircraft, and when the side clutch lever is returned to the clutch "engaged" position, the switching valve is switched and the aircraft travels. Since the aircraft is lowered by raising the wheels, a single operation of the side clutch lever is enough to disengage the clutch and lower the traveling wheels, as well as engage the clutch and raise the traveling wheels. However, each can be performed successively, and the operation when turning the headland at the edge of the field is simplified, the turning operation can be performed accurately, and the seedling planting rows will not be disturbed. Moreover,
The configuration is simple, as the switching valve of the hydraulic cylinder mechanism is simply connected to the elongated hole provided in the clutch lever.
Operability is also good.

[Brief explanation of drawings]

FIG. 1 is a side view of essential parts of the present invention.

FIG. 2 is a side view of a walking rice transplanter to which the present invention is applied.

FIG. 3 is a plan view of the same.

FIG. 4 is a plan view of the power transmission mechanism.

FIG. 5 is a plan view of the hydraulic mechanism.

FIG. 6 is a side view of essential parts of another embodiment of the present invention.

FIG. 7 is a perspective view of the handle portion.

[Explanation of symbols]

1 Walking type rice transplanter 2 Engine 3 Transmission 4 Handle 4a Grip part 5 Side clutch lever 6 Seedling stand 7 Transmission case 7a Balance mechanism 8 Running wheel 9 Center float 10 Side float 11 Hydraulic device 12 Hydraulic cylinder 13 Switching valve 13a Operation wire 14
Seedling planting body 15 Drive section 16 Transmission frame 17 Main clutch 17a Operation wire 18
Main clutch lever 19 Planting clutch 19a Operating wire 20
Planting clutch lever 21 Hydraulic lever 22 Clutch lever part 23 Friction type side clutch 23a Operating wire 24 Elongated hole 25 Hydraulic cylinder for tilt adjustment 26 Switching valve 27 Pendulum type horizontal sensor 28 Main transmission gear 29 Inter-plant switching gear 30 Seedling removal amount switching gear 31 Spare seedling stand 32 Accelerator lever 33 Marker switching operation wire 34 Balance mechanism lock wire

Claims (1)

[Claims] 1. A walk-behind rice transplanter comprising: a body equipped with running wheels that are raised and lowered by a hydraulic cylinder mechanism; a handle provided at the rear of the body; and a side clutch lever pivotally supported by the handle; When the side clutch lever is released, the clutch is engaged, and when it has rotated to a predetermined position, the clutch is disengaged.The switching valve of the hydraulic cylinder mechanism is connected to the elongated hole provided in the side clutch lever, and the side clutch lever is turned on. When the clutch is rotated further from the ``off'' position, the switching valve is activated to lower the traveling wheels, and when the side clutch lever is returned to the clutch ``engaged'' position, the switching valve is switched and the traveling wheels are raised. A side clutch for a walk-behind rice transplanter that is characterized by: