JPH068653Y2 - Two-wheel, two-row walk-type rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a two-wheel, two-row walk type rice transplanter equipped with a fertilizer application device.

[Conventional technology]

In the above-mentioned walk-behind rice transplanter, conventionally, for example, the actual Kaisho 6
As disclosed in Japanese Patent Publication No. 0-156907, fertilizer feeding devices for left and right articles are arranged side by side in the upper part of the bonnet, and the feeding devices of the left and right planting claw drive mechanisms are pushed through pulling rods. Left-right side-by-side type, which is configured to reciprocally rotate the lateral drive shaft, or actual open sho-1
As disclosed in Japanese Patent No. 14624, there has been a front-rear type in which a hopper is provided side by side along the front-rear direction of the machine body, and a fertilizer feed-out drive is performed by a front-rear drive shaft.

[Problems to be Solved by the Invention] In the first conventional structure described above, the fertilizer application device is arranged near above the grounding point of the wheel in order to suppress a change in front-rear weight balance due to a change in the storage amount of fertilizer. It was done.

However, according to the first conventional structure, it is necessary to dispose the drive shaft that is laid in the lateral direction so as to pass above the body part such as the bonnet, and the hopper is set at a high position.
There is room for improvement because the center of gravity becomes high and the posture tends to be unstable, and the maneuverability may deteriorate. According to the second conventional structure described above, since it is not necessary to install the feeding drive mechanism across the lateral direction of the machine body, the hopper can be arranged at a low position and the center of gravity position can be set low.
The weight balance between the front and rear of the aircraft may change due to the difference in the amount of increase or decrease in the fertilizer storage amount in the front and rear hoppers.

Therefore, as a method to place the left and right hoppers in the low position,
Regarding the drive of the left and right feeding device in the first conventional structure, a structure is conceived in which the left and right feeding drive shafts are configured in the front-back direction without using the horizontal axis, and are separately driven from the planting pawl driving device through the interlocking mechanism. However, in the planting pawl drive device, since the drive shaft is extended around the longitudinal axis with respect to driving around the horizontal axis, the interlocking mechanism is an expensive member such as a ball joint to allow three-dimensional movement. Since it is necessary to use a pair of left and right interlocking mechanisms, the structure is complicated and the cost is high.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and to place the fertilizer application at the lowest position as much as possible to suppress the change in the front-rear weight balance of the machine regardless of the increase / decrease of fertilizer, but to drive the fertilizer feeding drive. 2 which can simplify the structure
The point is to provide a two-wheeled walk type rice transplanter.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is characterized in that a fertilizer application device is provided between the left and right wheels, and the fertilizer application device is provided with a pair of fertilizer feeding devices, each of which has a fertilizer flow-down path on its lower side. In addition to the above, the drive shafts of the fertilizer feeding devices are respectively arranged in the front-rear direction of the machine body, and the operating force associated with the seedling planting claw drive of the planting claw drive device that drives the seedling planting claws is transmitted via a transmission mechanism. Transmission to one drive shaft, and
A link-type transmission mechanism that transmits the reciprocating rotation of the drive shaft as the reciprocating rotation of the other drive shaft is arranged in a state of bypassing the frame supporting the fertilizer application device, and via the link-type transmission mechanism, It is a two-wheel, two-row walk type rice transplanter in which the drive shafts are interlocked and connected, and the operation and effect are as follows.

[Action]

By arranging a pair of feeding devices on the left and right and configuring each feeding drive shaft in the front-back direction, the width in the lateral direction can be made compact, and the link type transmission mechanism that links the left and right drive shafts is Since the drive shafts are parallel, a simple pivotal connection structure may be used, and the fertilizer application can be operated at a low position by interlocking connection by the link type transmission mechanism arranged so as to bypass the frame supporting the fertilizer application. Can be deployed at Further, only one set of the transmission mechanism having a complicated structure for transmitting the actuating force from the planting pawl drive device by the three-dimensional movement is required, and the drive structure is simplified as a whole.

[Effect of device]

Therefore, by placing the left and right fertilizer feeding devices near the grounding point between the left and right wheels, it is possible to suppress the change in the front-rear weight balance of the machine to the smallest possible regardless of the increase / decrease in the fertilizer storage amount and to control the maneuverability. It is possible to set the fertilizer application to a low position and improve the steering stability by lowering the position of the center of gravity of the fertilizer application, while at the same time, it is possible to configure the feeding mechanism for feeding at low cost and with a simple structure. became.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 3 and 4, the engine (1) and the transmission case (2) are arranged in the front portion, and the left and right sides of the transmission case (2) are vertically swung about a lateral axis. Possible chain case
(3) is provided, traveling wheels (4), (4) are provided at the swinging ends of the chain cases (3), (3), respectively, and the chain is provided from the transmission case (2) toward the rear. A frame (5) containing a transmission mechanism (not shown) is provided, and a seedling planting device (A) for two rows is provided at the rear part of the frame (5), and a pair of rear end of the frame (5) is provided. The control handle rod (6) is extended, and further three leveling floats (7) are provided at the bottom to construct a two-wheel two-row walk type rice transplanter.

The seedling planting device (A) is a seedling stand on which a mat-like seedling (W) is placed.
(8) It is composed of two planting arms (9), (9), etc., is operated by the power from the chain transmission mechanism, and the frame (5) is arranged at the substantial center in the left-right direction of the machine body. The seedling stand (8) is located above the control handle rod (6) in a tilted rearward position, which is located at a higher level toward the rear of the aircraft.

As shown in FIG. 4 and FIG. 5, a hydraulic cylinder (10) extending and retracting in the front-rear direction is provided on the upper surface of the transmission case (2) at the center of the body in the left-right direction, and the piston rod (10a) is moved backward. The balance-like arm (11) is attached to the end of the piston rod (10a) so as to be swingable around the axis of the vertical axis and in a horizontal position.

Arms (3a) and (3a) are attached to the base ends of the left and right chain cases (3) and (3) substantially upward, and the tips of these arms (3a) and (3a) are attached. And both ends of the balance-like arm (11) are connected by rods (12) and (12), and a hydraulic cylinder (1
The level of the left and right wheels (4) and (4) with respect to the fuselage can be set by the operation of 0).

As shown in FIG. 5, the fertilizer applicator (B) that supplies fertilizer to the field in synchronism with the seedling planting operation in the rice transplanter has left and right wheels (4),
Prepared during (4).

This fertilizer application device (B) comprises a pair of fertilizer delivery devices (Ba) each consisting of a tank (13) for storing granular fertilizer and a delivery mechanism (14) integrally attached to the lower part of the tank (13). ), (Ba) are arranged in parallel on the left and right, and each feeding device (Ba), (Ba)
On the lower side of the fertilizer, a hose (15) that guides the fertilizer from the feeding mechanism (14) downward and a grooving device (16) that feeds the fertilizer from the hose (15) to the field constitute a fertilizer flow-down path. I am doing it. The left and right feeding mechanisms (14) and (14) enter the space between the hydraulic cylinder (10) and the left and right rods (12) and (12) in plan view,
In a side view, the rods (12) and (12) are arranged at a low level overlapping with each other.

In addition, as shown in FIGS. 1 and 2, the sub-frame (17) [the frame of the fertilizer application] extends from the upper part of the transmission case (2) to the frame (5) at the front position of the seedling planting device (A). One example] is formed, and the sub-frame (17) is formed on the upper surface of the sub-frame (17).
A slide frame (18) is slidably attached to the front and rear with respect to the left and right, and stays (19) and (19) for sandwiching the left and right feeding mechanisms (14) and (14) from the front and rear are provided on the slide frame (18). 18), the left and right feeding mechanisms (1
The slide frames (18) and (4) and (14) are configured to be movable in the front-back direction.

Further, the payout mechanism (14) is internally provided with a payout roll (14a) which swings with a shaft axis facing forward and backward.
The drive shaft (20) having a hexagonal sectional shape for operating (14a) penetrates the feeding mechanism (14) in the front-rear direction, and is in the axial direction of the drive shaft (20) with respect to the feeding mechanism (14). The rear parts of the left and right drive shafts (20), (20) are provided so as to be relatively movable, and are supported in a reverse state by a support frame (21) mounted in a horizontal position on the subframe (17). There is.

Further, swing members (22) and (22) are attached to the rear ends of the drive shafts (20) and (20), and these swing members (22) and (22) are attached to the subframe.
A link (23) made of a rod material that passes through a high level that bypasses the upper front side of (17) is linked with [an example of a link type transmission mechanism], and at the same time, of the planting arms (9) and (9). By transmitting power from one to the swing member (22) via a push-pull rod (28) [an example of a transmission mechanism] equipped with a ball joint that allows three-dimensional swing operation at the end, The feeding mechanisms (14) and (14) operate in synchronization.

In other words, the pushing / pulling rod (28) as the transmission means and the swinging member (22) actuate the driving force of the seedling planting claws of the planting claw driving device that drives one of the pair of left and right seedling planting claws. It transmits to the rear part of the drive shaft (20) of the one feeding mechanism (14) in the front-back direction of the machine body, and this drive shaft (20) is linked by the link (23) to the drive shaft of the other feeding mechanism (14) in the front-back direction of the machine body. By linking with the rear part of (10), it is possible to drive the left and right feeding mechanisms (14), (14) in conjunction with the seedling planting movement.

Incidentally, the feeding mechanism (14), the amount of feeding the fertilizer is adjusted by the turning operation of the adjusting knob (14b) fitted onto the drive shaft (20) at the front position of the feeding mechanism (14), As shown in FIG. 1, the screw shaft (24) is placed on the upper surface of the sub-frame (17) in a front-back orientation.
Is provided, and the nut (25) is in a state of being screwed with the screw shaft (24).
Is provided on the stay (19), and a crank arm (26) for rotating the screw shaft (24) is connected to the screw shaft (24) through a joint (27). The left and right feeding mechanisms (14), (14) and the tanks (13), (1
3) and are configured so that they can be moved and adjusted to any positions.

Further, as shown in FIG. 6, the grooving device (16) is attached to a grooving plate (7a) integrally formed with the front leveling float (7) so that its vertical position can be adjusted.

[Another embodiment]

In the above embodiment, the feeding device for the sub-frame (17)
(Ba) is configured to be supported so that it can be moved back and forth, but instead of such a configuration, it is located rearward of the feeding mechanisms (14) and (14) of the drive shafts (20) and (20). The protrusion amount may be reduced, and the left and right interlocking links (23) may be arranged at positions overlapping in the front and rear in a state of detouring above the subframe (17).

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a walk-behind rice transplanter according to the present invention.
The figure is a side view showing the moving structure of the feeding mechanism, Fig. 2 is a plan view showing the moving structure of the feeding mechanism, Fig. 3 is a partially cutaway plan view of the rice transplanter, and Fig. 4 is an overall side view of the rice transplanter. FIG. 5 is a rear view showing the arrangement position of the fertilizer application device, and FIG. 6 is a cross-sectional view showing the grooving plate of the leveling float. (4), (4) …… Wheels, (17) …… Frame, (20), (20) ……
Drive shaft, (23) …… link type transmission mechanism, (28) …… transmission mechanism, (B) …… fertilizer application, (Ba), (Ba) …… fertilizer feeding device.

Claims (1)

[Scope of utility model registration request] A fertilizer applicator (B) is provided between the left and right wheels (4), (4), and the fertilizer applicator (B) is provided with a pair of fertilizer feeding devices each having a fertilizer flow-down path on the lower side. (Ba) and (Ba) are arranged side by side, and the fertilizer feeding devices (Ba) and (B)
The drive shafts (20) and (20) of a) are arranged in the front-rear direction of the machine, respectively, and the transmission mechanism (28) is used to transmit the operating force associated with the seedling planting claw drive of the planting claw drive device that drives the seedling planting claw. A link type transmission mechanism (23) configured to transmit the reciprocating rotation of the drive shaft (20) as reciprocating rotation of the other drive shaft (20). , The frame (17) supporting the fertilizer application device (B) is arranged in a detoured state, and the drive shafts (20), (20) are interlockingly connected via the link type transmission mechanism (23). Have 2
A two-row walkable rice transplanter.