JPH0244663Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to the structure of a left-right steering clutch lever for a walk-behind rice transplanter.

(b) Conventional technology Conventionally, the left and right clutch levers of riding-type rice transplanters that can be operated in three stages have been developed by Jitsukasho.
There is a conventional technology such as that disclosed in Japanese Utility Model Application Publication No. 56-66209, and a technique for switching between forward and reverse directions of a riding rice transplanter while gripping the loop-shaped handle is as described in Japanese Utility Model Application Publication No. 56-66208. The technology is known to the public.

(c) Problems to be solved by the invention In the case of a riding-type rice transplanter, since the operator is on board, there is no need to balance his or her body, and both hands can be freed.
The clutch lever, which can be operated even when moving backwards, can be operated with both hands without taking your hands off the running handle, but in the case of walk-behind rice transplanters, the operator has to walk, and the rice transplanter does not need to move. In order to maintain the straightness of the machine, it is necessary to always hold the left and right steering handles and perform turning operations at the edge of the field.

Therefore, it is impossible to arrange a clutch lever that can be operated in three stages separately from the steering handle as in the prior art.

Furthermore, it is impossible to integrate the left and right clutch levers, which operate in three stages, into a loop handle.

This invention enables interliner rotation even with a walk-behind rice transplanter by arranging clutch lever operations, including backward movement, on the left and right clutch levers provided on the steering handle. It is something.

(d) Means for solving the problem The problems to be solved by this invention are as described above.
Next, means for solving the problem will be explained.

Left and right steering handles 3L and 3R of the walk-behind rice transplanter
Left and right clutch levers 5L and 5R are attached below the steering clutch lever 5L and 5R so that they can be grasped and operated.
The gripping state of the steering clutch levers L and 5R is configured to be operated in three stages, and when the steering clutch levers 5L and 5R are in an open position, the left and right steering clutches are "engaged," and when the steering clutch levers 5L and 5R are in a half-grip position, the steering clutch is "disengaged." The vehicle is driven in "reverse" mode when the grip is in the full grip position.

(E) Embodiment The problems to be solved by the present invention and the means for solving them are as described above.Next, the structure of the embodiment shown in the attached drawings will be explained.

Figure 1 is an overall plan view of the walking rice transplanter, Figure 2 is a power transmission diagram of the transmission case, and Figure 3 is a diagram of the power transmission of the transmission case.
The figure is a side view of a three-stage clutch lever provided with a handle, and FIG. 4 is a plan view showing the turning operation at the edge of a field.

In Figure 1, the walk-behind rice transplanter has bonnet 1.
Power is transmitted from the engine in 0 to the transmission case M via a centrifugal clutch. Swing shafts 17L, 17R protrude from the transmission case M to the left and right, these swing shafts 17L, 17R are pivotally supported, and left and right wheels 2L, 2R are supported by a short axle at the rear end of the swing case. A power transmission case protrudes rearward from the mission case M, and a power transmission shaft in this case drives the planting drive mission case.

Seedling take-out plate 11 is placed on the planting drive transmission case.
is provided, and the seedling platform 8 moves left and right on the seedling take-out plate 11.

Further, steering handles 3L and 3R are protruded rearward from the planting drive transmission case.
The steering handles 3L, 3R are provided with steering clutch levers 5L, 5R, a planting clutch lever 6, a traveling clutch lever 4, etc., which are essential parts of the present invention.

In FIG. 2, power from the engine through a centrifugal clutch is shifted between double sliding gears 13, 14 and fixed gears 16, 15 between working speeds. Power is transmitted from the fixed gear 18 to the fixed gear 19,
Power is transmitted to forward gear 21 and reverse gears 20 and 22. The forward gear 21 is the swing shaft 17L, 17
The back gears 20 and 22 are always meshed with the loose fit gear 26 on the butt portion of R, and the reverse gears 20 and 22 are the reverse gears 23R and 23.
Via L, power is constantly transmitted to loosely fitted gears 24R, 24L on the left and right swing shafts 17L, 17R.

The aforementioned forward loose fit gear 26 is provided with clutch engaging pawls on the left and right sides, and the left and right clutch sliding bodies 25L, 25
When R moves inward and engages with this clutch engaging pawl, it moves forward.

Conversely, when the left and right clutch sliding bodies 25L, 25R mesh with the clutch engagement holes of the loosely fitted gears 24L, 24R for reverse travel, the vehicle travels in reverse.

These clutch sliding bodies 25L, 25R are moved by steering clutch levers 5L, 5R provided on the handle.

In FIG. 3, at the position of the steering clutch lever 5, the clutch sliding body 25 is engaged with the clutch engaging pawl of the forward loosely fitted gear 26, and the steering clutch is in the "engaged" state.

When the steering clutch lever 5 is in the half-grip position 5', the clutch sliding body 25 is in a neutral state in which it does not engage with either clutch engaging pawl, and the steering clutch is in a "disengaged" state.

When the steering clutch lever 5 is fully gripped to the 5'' position, the clutch sliding body 25 meshes with the reverse loose gear 24, resulting in a "reverse" state.

In Fig. 4, when the rice transplanter was trying to turn around the edge of the field from the outbound path shown by the solid line to the return path shown by the chain line, conventionally only the steering clutch was used and reverse movement was not possible, so the rice transplanter must pass through the turning path A. I had no choice but to do so. Therefore, when there was a diagonal ridge, the ridge could not be bent all at once, and had to be turned back and forth several times using the operator's physical strength to move it to the adjacent ridge.

On the other hand, with the present invention, the clutch lever can be used to move backwards, so it is possible to turn on the spot following route B, and it is possible to attach to the adjacent row without having to turn back or turn using arm strength.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, in a walk-behind rice transplanter, the operator must follow the machine and must keep his/her hands on the steering handles 3L and 3R at all times in order to maintain balance while walking. Therefore, it is impossible to operate a clutch lever provided in a position separate from the steering handle or a steering handle provided in a loop shape, as in the interlining rotation mechanism provided in a conventional riding rice transplanter.

In the present invention, the steering clutch levers 5L and 5R attached to the steering handles 3L and 3R can be operated in three stages, making it possible to rotate the interlining. It is possible to rotate the interlining while holding the facing handles 3L and 3R.

Second, left and right steering clutch levers 5L, 5R
By fully squeezing both at the same time, you can make the left and right wheels move backwards, so if you want to move the aircraft a short distance backwards, use the steering handles 3L,
By fully grasping 3R and steering clutch levers 5L and 5R, it is possible to move backwards with a simple operation.

[Brief explanation of the drawing]

Figure 1 is an overall plan view of the walking rice transplanter, Figure 2 is a power transmission diagram of the transmission case, and Figure 3 is a diagram of the power transmission of the transmission case.
The figure is a side view of the three-stage clutch lever provided on the handle, and FIG. 4 is a plan view showing the turning operation at the edge of the field. 2L, 2R...Wheels, 3L, 3R...Steering handle, 5L, 5R...Steering clutch lever.

Claims (1)

[Scope of utility model registration request] Left and right steering handles 3L and 3R of the walk-behind rice transplanter
Left and right clutch levers 5L and 5R are attached below the steering clutch lever 5L and 5R so that they can be grasped and operated.
The grip state of the steering clutch levers L and 5R is configured to be operated in three stages, and when the steering clutch levers 5L and 5R are in an open position, the left and right steering clutches are "engaged," and when the steering clutch levers 5L and 5R are in a half-grip position, the steering clutch is "disengaged." A walk-behind rice transplanter that is characterized by being able to travel "backwards" when the grip is in the full grip position.