JPS60192508A - Rolling apparatus of seedling planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a rolling device for a seedling transplanter.

When traveling in the field, the wheels of the seedling transplanter move up and down due to the unevenness of the tiller, but the float maintains a constant ground pressure against the soil surface, and the seedling transplanter slides while rolling against the traveling vehicle body to perform seedling planting work. However, if the seedling planting device is raised to a non-seedling position while rolling control is activated, such as when turning, it will be unstable as it will rise in a tilted position with respect to the vehicle body. It's so noticeable that it becomes a plant. Therefore, when ascending, it is necessary to correct the inclination of the seedling planting device and maintain it in a horizontal position.

The present invention takes the following technical measures for this purpose.

That is, a seedling planting device W (2) provided so as to be able to freely roll with respect to the traveling vehicle body (1) is equipped with a float sensor (3) located below the seedling planting device (2) and detecting the ground pressure; a rolling hydraulic device (4) that controls the rolling position of the seedling planting device (2) by means of a lifting hydraulic device (3); and a lifting hydraulic device (4) that raises the seedling planting device (2) to a non-seedling planting position.
5), and when the lifting hydraulic system (5) raises the seedling planting device (2), the rolling hydraulic system (4)
) is provided with an operating device (6) for lifting the seedling planting device (2) by canceling rolling control.

This invention has the following technical effects due to such a configuration. That is, a seedling planting device (2) using a traveling vehicle body (1)
) When performing seedling planting work, the float sensor (3) on the lower side of the seedling planting device (2) determines the relative position of the traveling vehicle body (1) and the seedling planting device (2) with respect to the soil surface. By detecting the ground pressure with the soil surface, the rolling position is controlled via the rolling hydraulic system (4) to keep the seedling planting device (2) sliding parallel to the soil surface, and the seedling planting state is always constant. However, the operating device (6) operates the lifting hydraulic device (5) to raise the seedling planting device M (2) to the non-seedling planting position t.
When planting, the rolling control position by the rolling hydraulic device (4) is released by operating this operating device (6), and the seedling planting device (2) is moved to the float sensor (3).
Vehicle running without rolling restrictions (1)
Since the seedling planting device (2) is raised while maintaining its posture relative to the vehicle body (1), the seedling planting device (2) does not travel in an inclined posture due to the rolling ring relative to the traveling vehicle body (1), and the operation can be simplified.

In addition, in the illustrated example, the prime mover (7) is located at the upper front of the vehicle body (1), and the transmission case (8) is located midway down.
The transmission case (10) is provided with a base end portion of a transmission case (1o) extending rearward and diagonally downward on both left and right sides of the transmission case (8), which has a pilot's seat (9) at the rear.
A rear wheel (2) is mounted on a shaft at the rear end for interlocking drive. (12) is a front wheel and is attached to the lower front of the traveling vehicle body (1), and above this front wheel (12) is a control handle (35).
) has been established.

A pair of left and right seven-piece links (13) (13) and a lower link (14) are pivotally connected to the rear end of the traveling vehicle body (1), and a rolling link is attached to the rear end of the upper link (13) (13). Links (15) (15) are pivotally connected using swivel bearings. Also, the rear end of the lower link (14) is connected to the gear case (1
6) is rotatably fitted into a shaft (17) that protrudes rearward from the center portion. A horizontal shaft (18) is inserted through and fixed to this shaft (17), and the rolling links (15) (15) are pivotally connected to both ends of this horizontal shaft (!8) by swivel bearings. At the rear end of these link mechanisms there is a flow of 31i) (3
) (3) (18) and a seedling planting device (2) equipped with a seedling insertion mechanism (20) and the like are connected. Of these, the float senna (3) (3) on both the left and right sides are implanted at the rear with 1 ■
The float sensor (3B) is pivotally mounted to the float sensor (3B) so as to be vertically movable, and the ground pressure against the soil surface can be detected by the downward swinging of the float sensor (3) (3).

Further, the rolling hydraulic system (4) has a circuit switching 5f'.
(21) Consists of (21), main circuit switching valve (22), and hydraulic cylinder (23) (23). The main circuit switching valve (22) is installed below the traveling vehicle body (1), and the hydraulic pump (38) and the circuit switching valve (21)
(21), the two switching valves (21) are configured to switch between a circuit that communicates with both of them and a circuit that communicates with either one separately, and are provided with protrusions (25). The pair of circuit switching valves (21) (21) are provided above each of the float sensors (3) (3) and are interlocked and connected to the float sensor (3) by a rod (41). , the hydraulic cylinders (23) communicating with each other are configured to perform switching such as raising the oil supply, lowering the oil drain, and shutting these off.

The hydraulic cylinder (23) (23) has its base end pivotally connected to the rear end of the transmission case (8), and the other end is an operating rod C28).
A spring (27) (27) is fitted into (2B) and slidably inserted into the tip side of the upper link (13) (13), and the seedling planting device (2) is connected to this hydraulic cylinder (2B).
23) A receiving piece (28) is fixed to the tip of the winter operating rod (28), which is provided to be movable up and down by (23).

The number receiving piece (28) and the locking plates (28) provided near both ends of the main circuit switching valve (22) are connected by a 7-outer wire (30), and the inner wire (31) is connected to the upper link (31).
13) Connect each corresponding locking tool (32) provided near the tip of (13) and the main circuit switching valve (22) to the spring (42).
). This rolling hydraulic system (4
) is connected to the rod (4) by each float sensor (3) (3).
1), the circuit switching valves (21) (21) are switched to the upward or downward side to operate each hydraulic cylinder (23) (23) independently, and the left and right upper links (13) (1) are operated independently.
By rolling the seedling planting device (2) according to the relative vertical movement position of 3) and by varying the tension length of the left and right inner wires (31) by rolling the seedling planting device (2). , the inner wire (31) on the side with a larger pulling length pulls and moves the main circuit switching valve (22) to increase the oil pressure on the circuit switching valve (21).
The configuration is such that switching is linked to send oil only to the tank.

The operating device (6) is provided with a rotatable operating lever (33) on the side of the cockpit (9), and an operating plate (30) is integrally provided at the tip of this lever (33), and the operating Board (34)
A groove part (37) is formed with the tip expanded, and +iiJ
The operation wire (
38) and a lever (24) connected thereto, the switching valve (21) can be pushed by this lever (24).

The lifting hydraulic system (5) is a hydraulic cylinder (23).
(23) Consists of a circuit switching valve (2υ (21) and a main circuit switching valve (22). Operation lever (33)
) in the direction of arrow (a) to raise the seedling planting device (2), each circuit switching valve (21) is
(21) to the upward oil supply side, and at the same time the operation panel (34)
Pull the protrusion (25) back to the center position using the groove (37),
Connect the main circuit switching valve (22) to both circuit switching valves (21) (21
) in order to communicate with the oil supply system. (
40) is a relief valve.

By transmitting power to each part of the seedling transplanter and operating the control lever (33) in the direction opposite to the arrow (a) to switch each switching valve (21) (21) to the downward circuit, the hydraulic cylinder (23) (23
) is released, the seedling planting device (2) is lowered, and the float (
3) (3) (19) is grounded on the soil surface, and without moving the traveling vehicle body (1) forward, perform seedling planting work using the seedling cutting mechanism (20). At this time, the traveling vehicle body (1) is connected to the wheels (11).
Although it slopes due to the unevenness of the plowing plate (12),
The left and right float sensors (3) (3) separately sense the ground pressure with the soil surface and raise or lower the circuit switching valves (21) (21) via the rods (41) (41). By switching and operating the hydraulic cylinders (23) and (23) separately, the seedling planting device (2) is controlled in a rolling manner so that the left and right float sensors (3) (3) slide into contact with the soil surface with equal pressure. During such rolling control, the operating rod (28) on the side pushed out by the hydraulic cylinder (23)
) If the distance between the receiving piece (2B) and the 7-way link (13) (13) locking tool (32) is larger than the distance between the hydraulic cylinder (23) on the other side, the inch on the side where this distance is larger The wire (31) is pulled and the main circuit switching valve (
22) on this inch wire (31) side.
1), and the pump (33) passes through the switching valve (22) to the operating rod (2) of the hydraulic cylinder (23).
6) and roll the seedling planting device (2).

In this way, the seedling planting device (2) is attached to the traveling vehicle body (1).
), the switching valve (22)' is switched to form an oil supply circuit only to the switching valve (21) on the side where oil should be sent to the hydraulic cylinder (23), and
3) Downward switching due to drained oil is performed using each switching valve (21) (21
) carried out by its own.

When raising the seedling planting device (2) to the non-seedling planting position, when the operating lever (33) is operated to the ascending position a (a), the circuit switching valve (21) is opened via the operating wire (38) (3B). )
(21) to the raised position, but at the same time, the protrusion (25) of the hydraulic cylinder (23) in the rolling position is guided by the structure (37) of the operation plate (30) and pulled back to the center position. The main circuit switching valve (22) switches to the circuit position to send oil to both circuit switching valves (21) (21), and simultaneously sends oil to both hydraulic cylinders (23) (23). ) (13) is operated to raise.

Therefore, when performing a lifting operation using the operating device (6),
By canceling the circuit restriction by the rolling control switching valves (21) and (22), the seedling planting device (2) can be raised relative to the traveling vehicle body (1) to a non-seedling planting position.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a partial perspective view, and FIG. 3 is a mechanism diagram. In the figure, code (1) is the running vehicle body, (2) is the seedling planting, W, (
3) is a float sensor; (4) is a rolling hydraulic system; (5) is a lifting hydraulic system; and (6) is an operating device. Patent applicant name: Iseki IIE Machine Co., Ltd. Representative: Masataka Iseki

Claims (1)

[Claims] L provided so as to be able to roll freely relative to the traveling vehicle body (1)
7. The planting device (2) has a float sensor (3) located below the seedling planting device (2) that detects the ground pressure, and a flow i sensor (3) to control the rolling position of the seedling planting device (2). a rolling hydraulic device (4) for raising the seedling planting device (2) to a non-seedling planting position;
5) and this! When the seedling planting device (2) is raised by the lowering hydraulic device (5), the rolling hydraulic device (
4) Cancel the rolling control and plant the seedlings M(2)
A rolling device for a seedling transplanter, which is provided with an operating device (6) for operating the ``2''.