JPH0646889B2 - Walk-behind rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention attaches to left and right wheels to a machine body via a pair of wheel transmission cases that can swing up and down, and is attached to the machine body at the left and right center portions of the machine body. An attached hydraulic cylinder that can expand and contract in the longitudinal direction of the machine body swings the wheel transmission case to move the left and right wheels up and down with respect to the machine body. The middle part of the interlocking arm is attached, and both ends of this interlocking arm are separately connected to the wheel transmission cases via a pair of left and right interlocking rods in the front-rear direction of the body, and the seedling stand is set to a higher level toward the rear of the body. The present invention relates to a walk-behind rice transplanter having a rearwardly tilted state planting device provided at the rear of the machine body.

[Conventional technology]

Conventionally, in this type of walk-type rice transplanter, the internal fertilizer in the fertilizer tank is fed by a feeding mechanism, and the fertilizer supply hose fed from the feeding mechanism is used as a piston rod of a hydraulic cylinder that can expand and contract in the machine longitudinal direction. It is arranged on the rear side of the machine body with respect to the interlocking arm connected to, and is configured to supply fertilizer to the groover via this hose and to feed the fertilizer supplied by the groover to the field. By providing the fertilizer application described above, the fertilization work can be performed simultaneously with the seedling planting work (for example, Japanese Utility Model Laid-Open No. 60-156907).

[Problems to be Solved by the Invention]

In this type of walk-behind rice transplanter, it is desirable to install a fertilizer tank and a feeding mechanism near the axle center of the axle in order to prevent the front-rear balance of the machine from being disrupted due to changes in the amount of fertilizer remaining in the fertilizer tank. . However, in the walk type rice transplanter of the conventional structure, since the fertilizer supply hose is arranged on the rear side of the machine body with respect to the interlocking arm connected to the piston rod of the hydraulic cylinder that can expand and contract in the machine body longitudinal direction, , There are the following problems.

In other words, in order not to form a curved path that tends to cause clogging of this fertilizer supply hose, the inclination and bending degree of the path from the fertilizer tank to the grooving device in the side view of the machine are suppressed to a small level. Then, the maximum extension position of the hydraulic cylinder for moving the interlocking arm in the machine longitudinal direction is limited to a position near the wheel axis where the hose is arranged.
Therefore, the installation range of the hydraulic cylinder is not limited to the limited range from the prime mover installation position in the front part of the machine body to the installation position of the hose. In particular, if the fertilizer tank or the feeding mechanism is to be positioned lower in order to lower the body weight and stabilize the running posture, the maximum extension position of the hydraulic cylinder will be further restricted than in the case of using a hose. .

Therefore, if the ratio of the expansion and contraction amount of the hydraulic cylinder to the required lifting amount of the wheel is made sufficiently large, the longitudinal length of the machine body becomes longer than necessary due to the installation of the hydraulic cylinder, and the turning radius of the machine body increases. However, if the ratio of expansion and contraction of the hydraulic cylinder is made small, it is effective in shortening the front-rear length of the machine, but on the other hand, it is necessary to move the wheels up and down with a small stroke. However, there is a disadvantage that a large driving force is required.

The object of the present invention is to obtain a fertilizing work that can be applied at the same time as the seedling work in an advantageous state in terms of weight balance and wheel lifting structure, do not lengthen the entire length of the machine more than necessary, and also provide a large driving force. It is to provide a walk-behind rice transplanter that can raise and lower wheels without using it.

[Means for Solving the Problems]

The technical means of the present invention taken to achieve the above object,
The left and right wheels are individually swingably mounted on the machine body through a pair of wheel transmission cases that can be swung up and down, and a hydraulic cylinder that is attached to the center of the machine body in the left-right direction and that can expand and contract in the machine longitudinal direction is transmitted to the wheels. Attach the middle part of the interlocking arm in the lateral direction of the machine to the piston rod of the hydraulic cylinder so that the left and right wheels can be moved up and down with respect to the machine by rocking the case. Each of the wheels is connected to the wheel transmission case through the interlocking rod in the front-rear direction of the machine, and a seedling planting device is provided at the rear of the machine having a rearward tilted state in which the seedling stand is located at a higher level toward the rear of the machine. In a walk-behind rice transplanter, a fertilizer tank, a feeding mechanism that feeds fertilizer from this fertilizer tank, a hose that guides the fertilizer from this feeding mechanism, and a fertilizer from this hose that feeds the fertilizer to the field maintenance. A fertilizer application device having a container is provided between the left and right wheels, and the hydraulic cylinder is expanded and contracted in the direction in which the hydraulic cylinder extends and contracts, and the hydraulic cylinder expands and contracts when the hydraulic cylinder extends and contracts. Is set so as to be interlocked with the swinging direction, and the end opposite to the side to which the interlocking arm is connected is supported and disposed on the front side of the machine body. The fertilizer supply path to the groove device is formed so as to be located between the piston rod and the interlocking rod at a location on the front side of the fuselage relative to the interlocking arm in plan view of the fuselage. And
The action and effect are as follows.

[Action]

a. A fertilizer supply path from the fertilizer tank to the groover,
In a plane view of the machine body, it is formed so as to be positioned between the piston rod and the interlocking rod at a location on the front side of the machine body with respect to the interlocking arm. In other words, the interlocking arm is more than the fertilizer supply path of the fertilizer applicator. Since it is located on the rear side,
The extension amount of the hydraulic cylinder for moving the interlocking arm in the machine longitudinal direction is not restricted by the position of the fertilizer supply path. Therefore, as a hydraulic cylinder,
Even if a sufficient amount of expansion and contraction is adopted, it is possible to prevent the total length of the machine body from unnecessarily increasing, and it is possible to set a large ratio of the amount of expansion and contraction of the hydraulic cylinder to the amount of wheel elevation.

b. Also, make sure that the arm attachment end of the piston rod and the interlocking arm are located in a relatively large space between the fertilizer application and the seedling stand, and that the interlocking rod is located in a relatively large space between the wheels and the fertilizer application. A wheel lifting mechanism can be installed in the.

c. When inspecting or adjusting the fertilizer application in the field, the wheels are lowered due to the extension of the hydraulic cylinder and the machine is relatively raised, but at this time, the direction in which the interlocking arm moves away from the fertilizer application Can be moved to
It is easy to check the feeding mechanism and adjust the feeding both without being disturbed by the existence of the interlocking arm.

〔The invention's effect〕

I. Above a. Due to the action, while using a hydraulic cylinder with a large stroke that does not require a large driving force, the entire length of the machine can be configured to be short, a small turn can be made at the end of the field, and the headland that requires manual planting can be taken as much as possible. You can

B. Above b. c. Therefore, it is easy to inspect and adjust the wheel elevating mechanism and fertilizer application by using a relatively large space between the fertilizer application and the seedling placement and between the fertilizer application and the wheels. There are advantages.

〔Example〕

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

As shown in FIG. 1 and FIG. 2, the engine (1) and the transmission case (2) are arranged in the front part, and the laterally-oriented axis center is provided on both left and right sides of the machine body composed of the transmission case (2). The traveling wheels (4) and (4) are mounted so that they can be swung up and down via the chain type wheel transmission case (3) that can be swung up and down. Also, the chain transmission is performed from the transmission case (2) toward the rear. A frame (5) containing a mechanism (not shown) is provided, a seedling planting device (A) for two rows is provided at the rear part of the frame (5), and a pair of right and left is provided from the rear end of the frame (5). A walk-behind rice transplanter is constructed by extending the control handle rod (6) and further providing three leveling floats (7) at the bottom.

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., and is configured to be operated by power from the chain transmission mechanism.
The seedling stand (8) is arranged in a rearwardly inclined state, which is located at a higher level toward the rear of the aircraft. The frame (5) is arranged substantially in the center in the left-right direction of the machine body.

As shown in FIG. 2 and FIG. 4, a hydraulic cylinder (10) extending and retracting in the front-back direction is provided on the upper surface of the transmission case (2) at the center of the machine body in the left-right direction, and the piston rod (10a) is moved backward. The intermediate portion of the balance-like interlocking arm (11) in the machine lateral direction is attached to the end of the piston rod (10a) so as to be swingable around the vertical axis. Transmission case for left and right wheels
(3), (3) Arms (3a), (3
a) is attached, and the ends of these arms (3a), (3a) and both ends of the balance-like interlocking arm (11) are connected by interlocking rods (12), (12) in the machine longitudinal direction. The level of the left and right wheels (4) and (4) for the machine body can be set by operating the hydraulic cylinder (10).

In other words, as the hydraulic cylinder (10) expands and contracts, the interlocking arm (11) moves in the machine front-rear direction to move one interlocking rod.
One wheel transmission case (3) via (12) and the other wheel transmission case via the other interlocking rod (12).
By swinging (3) respectively, the hydraulic cylinder (10)
Is configured to swing the pair of wheel transmission cases (3) and (3) in the same direction to move the left and right wheels (4) and (4) up and down in the same direction with respect to the machine body.

As shown in FIG. 4, a fertilizer application device (B) for supplying fertilizer to the field is provided substantially in synchronization with the seedling planting operation.

The fertilizer applicator (B) is made for two articles by arranging two structures with the same function side by side. The structure for one article is a hopper type tank (13) for storing granular fertilizer, this tank ( The feeding mechanism (14) attached to the lower surface of the fertilizer tank (13) so as to feed the internal fertilizer from (13), and the hose (1 that guides the fertilizer from the feeding mechanism (14).
5), Groover (16) that feeds fertilizer from hose (15) into the field
And is located between the left and right wheels (4), (4).

The left and right feeding mechanisms (14) and (14) are shown in Figs.
By arranging as shown in the figure, the fertilizer supply path from the fertilizer tank (13) to the grooving device (16) on both the left and right sides is the piston rod (10a) on the front side of the machine from the interlocking arm (11) in plan view of the machine. The fertilizer tank (13) and the feeding mechanism (14) on the right and left sides of the wheel (4) and on the left and right. In each case, consideration is given to the degree of bending and inclination of the fertilizer supply path when viewed from the side of the machine body.

Further, as shown in FIG. 3, a sub-frame extends from the upper part of the transmission case (2) to the frame (5) at the front position of the seedling planting device (A).
(17) is formed, and the stays (18) and (18) for connecting the feeding mechanisms (14) and (14) to each other are detachably fixed to the upper surface of the sub-frame (17) to apply fertilizer. When inspecting or repairing the device (B), the left and right fertilizer tanks (13), (13) and the feeding mechanisms (14), (14) are integrally removed upward.

The feeding mechanism (14) is formed by fitting a feeding roll (not shown) onto the swing shaft (14a) arranged in the front-back direction in a penetrating state, and is provided at the front end of the swing shaft (14a). It is configured to adjust the feed amount of fertilizer by rotating the adjustment knob (14b), and
Left and right swing shafts (14a), (14b) are links (19) made of rod material
The left and right fertilizer applicators (B) and (B) are simultaneously driven by the power transmitted from one of the planting arms (9) and (9) through the push-pull rod (20). Operate.

Further, as shown in FIG. 5, the groovers (16) and (16) are provided with protrusions (7a) formed on the left and right of the rear end of the front float (7),
It is attached to (7a) via grooved plates (21), (21).

It should be noted that reference numerals are added to the claims 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 THE DRAWINGS The drawings show an embodiment of a walk-behind rice transplanter according to the present invention.
The figure is a partially cutaway plan view of the rice transplanter, Fig. 2 is the entire side view of the rice transplanter, and Fig. 3 is a side view showing the mounting structure of the feeding mechanism.
FIG. 4 is a rear view showing the arrangement position of the fertilizer application device, and FIG. 5 is a plan view showing the arrangement position of the grooving device. (3) …… Wheel transmission case, (4) …… Wheels, (8) …… Seedling stand, (10) …… Hydraulic cylinder, (10a) …… Piston rod, (11) …… Interlocking arm, (12) …… Interlocking rod, (13)…
… Fertilizer tank, (14) …… Feeding mechanism, (15) …… Hoses,
(16) …… Grower, (A) …… Seedling planting device, (B) …… Fertilizer.

Claims (1)

[Claims] Claims: 1. The left and right wheels (4), (4) are individually attached to the machine body through a pair of wheel transmission cases (3), (3) capable of swinging up and down, and are attached to the machine body at the center of the left and right sides of the machine body. A hydraulic cylinder (10) attached to the vehicle that can expand and contract in the longitudinal direction of the machine swings the wheel transmission cases (3) and (3) to move the left and right wheels (4) and (4) with respect to the machine. In order to move up and down with the piston rod (10a) of the hydraulic cylinder (10), the middle part of the interlocking arm (11) in the machine lateral direction is attached, and both ends of this interlocking arm (11) are paired with the left and right machine parts. After connecting the wheel transmission cases (3) and (3) to each other through the front and rear interlocking rods (12) and (12), the seedling stand (8) is positioned at a higher level toward the rear of the machine. A walk-behind rice transplanter provided with a seedling planting device (A) in a tilted state at the rear of the machine body, a fertilizer tank (13), a feeding mechanism (14) for feeding fertilizer from the fertilizer tank (13), This payout Mechanism (14) Hose (15) for guiding the manure from the left and right wheels fertilizing device (B) having a Sakumizoki (16) for feeding the manure from the hose (15) in the field
The hydraulic cylinder (10) is provided between (4) and (4) and the
The hydraulic cylinder (10) expands and contracts and the transmission cases (3) and (3) swing so that the wheels (4) and (4) ascend as (4) and (4) descend and contract as they move. Set the interlocking relationship with the direction, and
The fertilizer tank (13) supplies fertilizer from the fertilizer tank (13) to the groover (16) by arranging the end opposite to the side to which the interlocking arm (11) is connected to the front side of the machine body. A walk-behind rice transplanter in which a road is formed between the piston rod (10a) and the interlocking rod (12) at a location on the front side of the fuselage from the interlocking arm (11) in a plan view of the airframe.