JPH0236202B2 - HOKOGATATAUEKI - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an engine and a mission case in the front of the fuselage, a seedling planting device and a control handle connected to the rear of the fuselage, and a seedling planting device and a control handle connected to the rear of the fuselage. A wheel transmission case that extends rearward so as to be able to swing vertically, has a proximal case part connected to the transmission case so as to be swingable up and down, and a distal end part that is connected to the case part so as to be bendable up and down. and a side case part, and the tip of an arm extending from the base of the distal side case part, and the tip of a swinging arm pivotally connected to a fixed part on the mission case side so as to be able to swing vertically. The proximal case portion and the extending arm are pivotally connected so that the propulsion wheel pivotally supported by the distal case portion is reversibly moved rearward as the wheel transmission case swings downward. The present invention relates to a walk-behind rice transplanter in which the oscillating arm and the swinging arm are configured as a movable link part of four links.

[Conventional technology]

The above rice transplanter prevents the grounding point of the wheel from moving forward with respect to the center of gravity of the machine and causing loss of balance even when the wheel is lowered due to the bending of the wheel transmission case, and allows for deep plowing. When working in rice fields, this machine has the feature that the lifting of the front part due to the drive reaction force from the wheels can be corrected by adjusting the grounding point due to the bending. It was pivotally supported on one side along with the case part (for example, Japanese Patent Publication No. 52-34525).

[Problem that the invention seeks to solve]

However, if the tip side case part and the propulsion wheel are installed side by side, when driving in deep plowed fields where the wheels sink close to the axle, the width of the lower part of the tip side case and the width of the propulsion wheel combined is muddy soil. Since the seedlings are pushed widely in the left and right directions, there is a risk that the planting posture of the already planted seedlings will be disturbed. In addition, there was also a problem in which the propulsion resistance increased due to the mud pushing resistance of the distal case part.

The present invention has been made in view of the above-mentioned circumstances, and has an object to reduce mud pushing by the distal end side case portion by rationally arranging the wheel transmission case.

[Means for solving problems]

A feature of the present invention is that the distal end case portion is disposed closer to the center of rotation than the rim of the propulsion wheel and overlaps the propulsion wheel in the axial direction, and its functions and effects are as follows. It is.

[Effect]

In other words, since the distal end case section is arranged as described above, even if the distal end case section is made extremely close to the propulsion wheel in the shaft supporting direction, the rim and this case section will not come into contact with each other. By appropriately setting the width of the lug and the width of the tip side case part, the tip side case part can fit within the wheel width (lug width), and the shaft support part of the tip side case part can flow down. Even in such deep fields, all or most of the tip side case passes through the path of the propulsion wheel, reducing mud pushing. Moreover, propulsion resistance is also reduced.

〔Effect of the invention〕

Therefore, by rationally arranging the wheel transmission case, even when working in a deep plowing platform, there is less mud pushing and the planting posture of the already planted seedlings is less likely to be disturbed, and it is compact and has high strength. Now able to support propulsion wheels.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Figure 3, the engine 1 is located at the front of the aircraft.
and a transmission case 2, and a wheel transmission case 4 with one propulsion wheel 3 pivotally supported at the end thereof is attached to one side of the transmission case 2,
A seedling planting device 5 consisting of two planting arms, a seedling stand 6 for placing pine-shaped seedlings W, and a control handle 7 extending toward the rear are provided at the rear of the machine, and further,
A pair of soil leveling floats 8 on the left and right are provided for 2-row planting, 1
It consists of a walking rice transplanter.

To explain the wheel transmission case 4, the second
As shown in the figure, the case 4 includes a proximal case portion 4a that is vertically freely connected to the mission case 2 about an axis P, and a proximal case portion 4a that is vertically bendable about an axis Q with respect to the case 4a. Connected distal end side case part 4
b, and pivots the tip of a swinging arm 10 which is pivotally connected to the tip of an arm 9 extending from the base end of the distal case portion 4b and a fixed portion on the mission case 2 side so as to be able to swing vertically. The proximal case portion 4a and the proximal case portion 4a are connected to each other so that the propulsion wheel 3 pivotally supported by the distal case portion 4b is reversibly moved rearward as the wheel transmission case 4 swings downward. Out arm 9
and the swing arm 10 constitute a four-link. The vertical adjustment of the propulsion wheel 3 is performed by a hydraulic cylinder 11 interposed between the proximal case portion 4a and the transmission case 2.

As shown in FIG. 1, the proximal case portion 4a
The pivoting connection portion between the and the distal end case portion 4b is formed by overlapping the respective cases in the left-right direction, and further, the distal end case portion 4b is arranged closer to the center of rotation than the rim 3a of the propulsion wheel 3. By overlapping the propulsion wheel 3 in the axial direction and trimming the tip case 4b within the width of the wheel, that is, the width of the lug 3b, it can be used even when working in fields with deep tillers that sink down to the wheel shaft support. It is designed so that mud pushing occurs or hardly occurs at the lower end of the case 4b on the leading end side of the overlapping portion.

As shown in FIGS. 4 and 5, four star foil-shaped feeding claws 12 are arranged in parallel for each row at the bottom of the seedling stand 6 to feed the pine-shaped seedlings W downward, and four feeding claws 12 are arranged in parallel for each row. Two rods 13 per row are arranged in a downward cantilevered manner on the upper surface of the seedling stand 6 at the center of the left and right sides of the seedlings 12.

Incidentally, when feeding seedlings W with extremely good root growth to the seedling stand 6, the rod 13 eliminates entanglement between the roots and the feed claw 12 to smoothly feed the seedlings. Pine-shaped seedling W as shown
is deformed into a wave shape, and the bottom surface of the pine-shaped seedling W comes into contact with the feeding pawl 12 from the diagonal lateral direction during seedling feeding, so that the seedling feeding mechanism can be effectively performed.

[Another example]

In this embodiment, the present invention is applied to a one-wheel type rice transplanter, but the present invention may be applied to a two-wheel type rice transplanter as shown in FIG. 6 in addition to the one-wheel type rice transplanter.

That is, an engine 1 and a transmission case 2 are arranged at the front of the machine, and a wheel transmission case 4 consisting of a proximal case part 4a and a distal case part 4b is pivotally supported on both left and right sides of the transmission case 2. , the left and right tip side case portions 4b are connected to the rim 3 of the propulsion wheel 3.
The left and right wheels 3, 3 are pivoted so as to overlap with the propulsion wheel 3 in the axial direction so that the entire or most part of the case portion 4b is within the width of the lug 3b. It has been done.

[Brief explanation of drawings]

The drawings show an embodiment of the walk-behind rice transplanter according to the present invention, and FIG. 1 is a plan view showing the arrangement of the wheel transmission case, etc., FIG. 2 is a side view of the wheel transmission case, and FIG.
The figure is an overall side view of the rice transplanter, Figure 4 is a longitudinal side view of the seedling stand, Figure 5 is a sectional view taken along the line V-V in Figure 4, and Figure 6 is the arrangement of the wheel transmission case showing another embodiment. This is a diagram showing the relationship between the 1... Engine, 2... Mission case, 3
...Propulsion wheel, 3a...Rim, 4...Wheel transmission case, 4a...Proximal side case part, 4b...Distal side case part, 5...Seedling planting device, 7...Control handle, 9... ...Arm, 10...Swinging arm.

Claims (1)

[Claims] 1 Engine 1 and transmission case 2 are installed at the front of the aircraft, and a seedling planting device 5 is installed at the rear of the aircraft.
and a base end side case portion connected to the transmission case 4 to which the operation handle 7 is connected and which extends rearward from the transmission case 2 so as to be able to swing up and down. 4a, and a distal end case 4b connected to the case portion 4a so as to be vertically bendable, and an arm 9 extending from the base of the distal end case portion 4b.
The tip of the swing arm 10 is pivotally connected to a fixed part on the transmission case side so as to be able to swing vertically, and as the wheel transmission case 4 swings downward, the tip of the swing arm 10 is pivotally connected to a fixed part on the transmission case side. The proximal case portion 4a, the extending arm 9, and the swinging arm 10 are connected to a movable link portion of a quadruple link so that the propulsion wheel 3 pivotally supported by the portion 4b is reversibly moved rearward. The walking type rice transplanter is configured as follows, in which the distal end side case portion 4b is arranged closer to the center of rotation than the rim 3a of the propulsion wheel 3, and overlaps with the propulsion wheel 3 in the axial direction. Rice transplanter.