JPH0115294Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a so-called one-wheel type rice transplanter in which the body frame of the rice transplanter is supported by one wheel.

The body frame, transmission case with engine,
A pair of left and right side members each having a seedling planting case with a seedling planting mechanism attached to a side frame whose front end is connected to the transmission case, and arranged behind the transmission case and between the two side members. One wheel is attached to the rear end of a swing case whose front end is pivoted to the transmission case so as to be able to move up and down, while a rearward-tiling seedling stand and a pair of left and right controls are installed at the rear of both seedling planting cases. A single-wheel walking rice transplanter equipped with a handle is disclosed in Japanese Utility Model Application Publication No. 55-56514 as a prior art.

However, in this prior art single-wheel walking type rice transplanter, the rear ends of the pair of left and right side members extending rearward from the front transmission case are extended to the rear surface of the seedling stand, and the rear ends of the left and right side members are extended to the rear surface of the seedling stand. Since it is connected by a structural member attached to the rear of the seedling platform, the pair of left and right side members must be long enough to extend from the transmission case to the rear of the seedling platform. .

On the other hand, this type of one-wheeled rice transplanter has the advantage of a smaller turning radius when turning in a direction compared to a two-wheeled rice transplanter in which the body frame is supported by two wheels on both the left and right sides. The balance of the aircraft in the left-right direction is unstable, and it is necessary to hold one of the control handles at all times to prevent the body frame from tilting in either direction.

However, in the prior art, the inclination of the vehicle body frame must be supported by one of the two control handles.In other words, even if the weight of the vehicle body frame acts on both the control handles, Regardless, by configuring both control handles to be bent so that the distance between them is wider at the rear end and narrower at the front end, and attached to the horizontal member at the front end, the lateral side of both control handles is Since the structure is such that a large torsional load acts on the mounting base for the horizontal member, the mounting base for the horizontal member must be sufficiently reinforced, which complicates the configuration of the mounting base and As the length of the pair of side members becomes longer, the weight of the rice transplanter increases considerably.

The present invention shortens the length of both side members by connecting the pair of left and right side members at the front of the seedling stand, and at the same time allows both operating handles to be placed approximately straight from the side members. By extending rearward, the torsional load acting on the attachment bases of both operating handles to the side members is reduced. The purpose is to simplify the mechanism for raising and lowering the wheels by using connecting members.

Below, an embodiment of the present invention will be explained with reference to the drawings. In the drawing, 1 is a body frame of a rice transplanter, and the body frame 1 includes a transmission case 3 to which an engine 2 is attached on the top surface, and a front end connected to both left and right ends of the transmission case 3. A pair of left and right side members 1a, 1b are formed by attaching seedling planting cases 9, 10 to the rear ends of hollow side frames 4, 5 connected to the transmission case 3. The front end of a swing case 7, which is arranged to extend rearward between the side members 1a and 1b, is rotatably connected to the integrally provided traveling mission case 6. One wheel 8 located on the center line of the vehicle body frame 1 in plan view is mounted on the rear end, and this wheel 8 is connected to the traveling transmission case 6 through a chain (not shown) in a swing case 7. It is rotationally driven by the power transmitted by the

13 and 14 are the both side members 1a and 1
A pair of left and right operating handles are shown at the rear of the unit b, extending substantially straight rearward from both side members 1a, 1b, and the operating handles 13, 1
4 are attached to both side members 1a, 1b, and both operating handles 13, 14 are bent in a diagonally upward direction toward the rear in side view, and both operating handles are attached to the front part of the steering handles 13, 14. 1
Guide rail 15 installed laterally between 3 and 14
A seedling mounting stand 17 is provided which is supported movably in the left and right direction by a rail mechanism 16 and a seedling mounting stand 1.
7 is configured in a backward-tilting manner so that the upper end is located rearward than the lower end, and a transverse feed shaft 18 for the seedling platform 17 is provided on the rear side of the seedling platform 17. Power is transmitted through a chain case 19 extending rearward from one seedling planting case 9.

On the inner surfaces of the seedling planting cases 9 and 10 on both side members 1a and 1b, the seedling mounting stand 1 is provided.
The seedling planting mechanisms 20 and 21 are provided with vertically swinging type seedling planting mechanisms 20 and 21 that reciprocate between the seedling outlet 22 in the guide rail 15 of No. 7 and the field surface 27, and both seedling planting mechanisms 20 and 21 It is driven by power transmission from the case 3 through shafts (not shown) in both side frames 4 and 5.

Further, 23 and 24 are the both side frames 4,
5, and the floats 23 and 24 have their rear ends connected to both the control handles 1.
3, 14 via a planting depth adjuster 25, and the front end is attached to both side frames 4, 5 via a link 26 so as to be vertically movable.

The side members 1a and 1b are connected to each other by a connecting frame 11 configured in a gate shape so as to straddle the wheels 8 at a position in front of the seedling stand 17, and this gate-shaped connecting frame 11 A wheel lifting mechanism 12 with an operating lever for moving the wheels 8 up and down is attached to the wheel.

That is, to the right side member 1b adjacent to the swing case 7 among the side members 1a and 1b, a bell crank lever 28 is rotatably attached by a pin 29, and one end of the bell crank lever 28 is connected to the right side member 1b adjacent to the swing case 7. The bell crank lever 28 is connected to the swing case 7 via the bell crank lever 28, and the other end of the bell crank lever 28 is connected to the wheel lifting mechanism 12.

This wheel lifting mechanism 12 has an operating lever 30
When the female threaded pipe 31 is turned, the rod 32 screwed into the female threaded pipe 31 expands and contracts, thereby raising and lowering the wheel 8 via the bell crank lever 28. On the front side of the seedling stand 17, the control handle 13,1
The rice transplanter is disposed so as to face the rice transplanter 4 side, and is located between the two control handles 13 and 14 in a plan view of the rice transplanter.

In this configuration, the seedlings are supplied onto the seedling stand 17, and the vehicle body frame 1 is
3 and 14, and when the engine 2 is started, the wheels 8 and the seedling planting mechanism 20,
12, the rice transplanter moves forward by driving the wheels 8, while the seedling stand 17 is driven by the transverse feed shaft 18.
The seedlings on the seedling platform 17 are moved back and forth from side to side by the rotation of the seedling planting mechanism 2 which swings up and down.
0 and 21, and then planted one by one along two rows in a field 27 that has been leveled with floats 23 and 24 in advance.

During rice planting work using the rice transplanter or when the rice transplanter is running on the road, the operator is positioned behind the seedling platform 17 and between the two operating handles 13 and 14, so that the operating lever 3 of the wheel lifting mechanism 12
0 is disposed between the operating handles 13 and 14, the operator can use both operating handles 1
3 and 14, operate the operating lever 30 with your right hand while holding the left operating handle 13 with your left hand, or hold the right operating handle 14 with your right hand. This makes it easy to operate the operating lever 30 with the left hand.

As described above, the present invention comprises a vehicle body frame, a transmission case equipped with an engine, and a pair of left and right side members, each consisting of a side frame whose front end is connected to the transmission case, and a seedling planting case with a seedling planting mechanism attached to the side frame. One wheel is arranged at the rear of the transmission case and between both side members, and the front end is attached to the rear end of the swing case, the front end of which is pivoted to the transmission case so as to be movable up and down. In a walk-behind rice transplanter comprising a rearward-tiling seedling platform and a pair of left and right control handles arranged behind both seedling planting cases, the wheels are positioned between the two side members at a position in front of the seedling platform. are connected by a gate-shaped connecting frame that straddles the seedlings, and both of the control handles are configured to extend substantially straight rearward from the seedling planting case, and the front ends of both of the control handles are attached to the seedling planting case. On the other hand, the operating lever of the wheel lifting mechanism for vertically moving the swing case is attached to the gate-shaped connecting frame at a location between the operating handles when the rice transplanter is viewed from above. ,
It has the following actions and effects.

Both side members, which are each composed of a side frame and a seedling planting case with a seedling planting mechanism, are connected by a gate-shaped connecting frame that straddles the wheels at a position in front of the seedling stand. Since it is not necessary to extend to the rear surface of the seedling stand unlike in the prior art described above, the length of both side members can be shortened.

By configuring the left and right pair of control handles to extend substantially straight rearward from the seedling planting case on both side members, and by attaching the front ends of both control handles to the seedling planting case, the control handles are Since the torsional load acting on the attachment bases to the side members can be reduced compared to the case of the prior art, the structure of the attachment bases of both operating handles to the side members can be simplified.

The reduction in the length of both side members described above and the simplification of the mounting bases of both control handles described above combine to reduce the weight of the rice transplanter.

By locating the control lever for raising and lowering the wheels between the two control handles in a plan view of the rice transplanter, the operator can operate the left side while remaining in the position between the two control handles. This allows you to operate the control lever with your right hand while holding the steering wheel in your left hand, or operate the control lever with your left hand while holding the right control handle in your right hand. It is possible to extremely easily lift and lower the wheels of a single-wheel rice transplanter without tilting the rice transplanter in the left-right direction.

A gate-shaped connecting frame that connects both side members by attaching an operating lever for raising and lowering the wheels to the gate-shaped connecting frame that connects both side members at a position in front of the seedling stand. can be used as a support member for the operation lever for raising and lowering the wheels, and it is not necessary to separately provide the support member for the operation lever for raising and lowering the wheels at the front part of the seedling stand, so the structure of that part can be reduced. It can be simplified and the weight of the rice transplanter can be further reduced.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a rice transplanter, and FIG. 2 is a plan view of the rice transplanter. 1...Vehicle frame, 1a, 1b...Side member, 2...Engine, 3...Transmission case,
4, 5... Side frame, 7... Swing case, 8... Wheels, 9, 10... Seedling planting case,
DESCRIPTION OF SYMBOLS 11... Connection frame, 13, 14... Operating handle, 17... Seedling stand, 20, 21... Seedling planting mechanism, 12... Wheel lifting mechanism, 30... Operating lever.

Claims (1)

[Scope of utility model registration request] The vehicle body frame is composed of a transmission case equipped with an engine, and a pair of left and right side members each having a seedling planting case with a seedling planting mechanism attached to a side frame whose front end is connected to the transmission case,
One wheel disposed behind the transmission case and between the two side members is attached to the rear end of the swing case whose front end is pivoted to the transmission case so as to be movable up and down, while the two seedling planting cases A walk-behind rice transplanter comprising a rearward-tiling seedling stand and a pair of left and right control handles arranged at the rear of the machine, wherein the gate-type rice transplanter straddles the wheels between both side members at a position in front of the seedling stand. The two operating handles are configured to extend substantially straight rearward from the seedling planting case, and the front ends of the operating handles are attached to the seedling planting case, while the swing A walk-behind rice transplanter, characterized in that an operating lever in a wheel lifting mechanism for moving the case up and down is attached to the gate-shaped connection frame at a location between the two operating handles when the rice transplanter is viewed from above.