JPH0210882Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention has a working posture in which a support arm with a drawing arm at the tip is laid down to the outside of the aircraft body,
This invention relates to a line drawing device for a rice transplanter which is pivotably pivoted between a stored position standing upright on the side of the machine and a swingable position.

[Conventional technology]

In the working position, the support arm and line drawing arm are in a protruding state, lying down to the outside of the fuselage, and when in the storage position, standing up on the fuselage side, the support arm and the drawing arm are stored compactly by minimizing the overhang to the outside of the fuselage. A chain-like drawing arm is attached to the tip of the support arm, so that when the support arm is in a working position with the support arm lying down to the side of the aircraft, the drawing arm hangs directly below, and when it is in a retracted position when standing on the side of the aircraft. The drawing arm was configured to automatically switch to a position in which it overlaps and adheres to the support arm by its own weight. (For example, Utility Model Application No. 58-80951) [Problem that the invention attempts to solve] However, since the drawing arm is chain-shaped,
When the machine is in a working position hanging directly below, if the field is hard, the line drawing arm may move away from the intended line drawing area, causing a problem in which the desired work results cannot be obtained.

The purpose of the present invention is to provide a device that allows line drawing work to be performed as scheduled while maintaining a compact configuration that suppresses sideward protrusion of the fuselage when in the retracted position.

[Means for solving problems]

The characteristic configuration of the present invention is that the proximal end of the wire drawing arm is pivotally connected to the distal end of the support arm so as to be freely swingable around the longitudinal axis, and the support arm is in the working position at this pivotally connected portion. In this state, when the drawing arm is suspended directly below, the engaging portion is configured to be engaged by the ground resistance acting on the drawing arm toward the rear of the machine body to prevent the drawing arm from swinging from side to side. This engaging portion is configured to be automatically disengaged when no external force is applied to the rear of the machine body on the wire drawing arm, and its effects are as follows.

[Effect]

In other words, since the drawing arm is pivotally connected to the support arm so that it can freely swing, it can automatically overlap and close to the support arm when in the retracted position, resulting in a compact structure, and it is in a freely swinging state when in the working position. The wire-drawing arm located at the wire-drawing arm can be engaged with the engaging portion by utilizing the effect of slightly displacing the wire-drawing arm toward the rear of the fuselage due to the ground resistance received when the wire-drawing arm is suspended directly below, Regardless of the hardness or softness of the field, the drawing arm is prevented from swinging to the left or right, making it possible to perform drawing work along the area to be drawn.

[Effect of idea]

By simply modifying the engaging part,
Since the line drawing work can be performed reliably without increasing the installation space for the line drawing device, the overall work can be carried out efficiently, and it has high practical value, especially for multi-row rice transplanters. We were able to provide something.

〔Example〕

As shown in FIG. 5, at the rear of the traveling body A, which has a driving part 1, a driving part 2, a spare seedling stand 3, etc.
It is equipped with a four-link link 5 that can be vertically swung by a hydraulic cylinder 4, and a rice transplanting device B that is equipped with a seedling stand 6, a planting mechanism 7, and a ground float 25 is attached to the four-link link 5. They are detachably connected to form a riding-type rice transplanter for planting 8 rows.

As shown in Figures 1 to 5, a pair of line-drawing devices 9, 9 are distributed on both the left and right sides of the traveling machine to draw scheduled travel lines on the field for the next trip. Indicator for line 8
is installed at the front of the traveling machine A, and the machine is moved along the planned traveling line drawn on the side of the vehicle body as the machine advances during the previous work, and a constant planting between the planting shoots is carried out. It is ready for work.

To describe the wire drawing device in detail, the support arm 11 is pivoted to the body frame 10 so as to be able to swing freely between a working position in which it lies down to the outside of the body and a storage position in which it stands up on the side of the body.
B. The base end part 11A is divided into three parts, and the intermediate part 11B is horizontally swingable in the front-rear direction about the vertical axis P, and fixedly protrudes from the middle part side with respect to the base end part 11A. Through the engagement between the pin 12 and the notch on the proximal end side and in cooperation with the biasing force of the spring 13, the intermediate portion 11B can be maintained in a working posture that extends outward from the side of the fuselage within the set biasing force. be. The distal end portion 11C is connected to the intermediate portion 11B so as to be vertically swingable around the horizontal axis 15.
A hook 16 is provided which can switch C between a working position in which it lies down to the outside of the body and a storage position in which it stands up on the side of the aircraft, and biases the tip part 11C into the working position with a spring 14 and maintains the tip 11C in the storage position. , is attached to the intermediate part 11B in a state where it is urged to the operating position by the spring 17, and is configured to automatically act when the distal end part 11C is in the retracted position, and the distal end part 1
1C is pulled up and stored by a rope 18, and the hook 16 is released by a release wire 23 to move the distal end portion 11C into a use position.

Support arm 11 supports the base end of wire drawing arm 19
A pin 24 is connected to a plate-shaped bracket 20 provided on the tip 11C of the wire drawing arm 19 so as to be freely swingable about the longitudinal axis X, and the wire drawing arm 19 hangs directly below when the tip 11C is in the working position. A plate-shaped bracket is provided with a protruding engaging portion 20A that is engaged by ground resistance acting on the drawing arm 19 toward the rear side of the machine (in the direction opposite to the arrow in FIG. 2) to prevent left-right rocking when 20, and is configured such that the state of engagement of the drawing arm 19 with the engaging portion 20A is automatically released when no external force is applied to the drawing arm 19 toward the rear of the machine body.

As shown in FIG. 6, a telescopic damper 21 is installed between the frame 26 that supports the upper part of the seedling platform 6 and the four-link link 5, and damps the rolling and pitching operations of the seedling planting device B. It is configured to be applied. A hook member 2 is provided at the tip of the damper 21 and can be freely fitted into and removed from the cylindrical locking member 22 extending from the frame 26 from above.
1A, and a rubber bush 22A in which the inner diameter of the hooking member 21A is covered with the cylindrical locking member 22.
The damper 21 is formed to be smaller than the outer diameter dimension, and the axis Y of the damper 21 is configured to be lower than the axis Z of the cylindrical locking member 22, so that it is difficult to come off even when subjected to expansion and contraction force, and it is easy to plant seedlings. When removing the attached device B, if an upward swinging force is applied to the damper 21, it can be removed relatively easily.

[Brief explanation of the drawing]

The drawings show an embodiment of the wire drawing device for a rice transplanter according to the present invention, and FIG. 1 is a partially cutaway rear view, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a wire drawing arm in FIG. 2. 4 is a sectional view taken along the line -- in FIG. 2, FIG. 5 is a side view of the rice transplanter, and FIG. 6 is a side view showing the telescopic damper. 11...Support arm, 19...Line drawing arm,
20A...Engagement part.

Claims (1)

[Scope of utility model registration request] A wire drawing device for a rice transplanter in which a support arm 11 having a wire drawing arm 19 at its tip is pivotably pivoted to switch between a working position in which it lies down to the side of the machine body and a storage position in which it stands up on the body side, The proximal end of the drawing arm 19 is pivotally connected to the distal end of the support arm 11 so as to be freely swingable around the axis X in the longitudinal direction, and at this pivotally connected portion, there is provided a support arm 11 with the support arm 11 in the working position. , an engaging portion 20A that is engaged by the ground resistance acting on the drawing arm 19 toward the rear of the machine body to prevent the drawing arm 19 from swinging from side to side when the drawing arm 19 is suspended directly below. This drawing device for a rice transplanter is provided, and this engaging portion 20A is configured to be automatically disengaged when an external force to the rear of the machine body ceases to act on the drawing arm 19.