JPS6048122B2 - rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a grounding float that is swingable up and down about a horizontal axis on the rear side, and a mechanism that biases the front side of the float in a downward direction so that the biasing force can be changed and set. and a mechanism for automatically driving the seedling planting device up and down in order to maintain the float in a set posture as the float swings up and down, and a mechanism for changing the set posture of the float. Although it is a simple improvement, the purpose is to make it possible to change the setting posture of the grounding float and the float pressing force with good operability depending on the hardness and softness of the muddy soil for planting seedlings. In the machine, the biasing force changing setting mechanism and the setting attitude changing mechanism are automatically and reversibly connected to each other so that the setting attitude of the float is upward as much as possible as the biasing force is increased. characterized by things.

In other words, when the muddy soil for planting seedlings is hard, the biasing force is increased, and the control sensitivity of the automatic lifting mechanism based on the up-and-down movement of the float is made dull, and the unevenness of the mud surface is evened out by pressing down the float. At the same time, the float is set in a forward-upward position so that it can smoothly ride over the unevenness of the mud surface, and vice versa. When the mud is soft, the biasing force is reduced to make the control sensitivity more sensitive, increasing the ability of the elevating mechanism to follow the up-and-down movement of the float, and at the same time preventing disturbance of the mud surface due to sinking of the rear part of the float. In order to avoid trouble, the float float is set in a slightly horizontal position, and a simple improvement in which the correlation between the biasing force and the set position angle of the float is adjusted in conjunction with each other can be used to adjust the float to an appropriate position depending on the hardness and softness of the muddy soil in which seedlings are planted. It has become possible to perform various controls with ease using a single operation.

Next, embodiments of the present invention will be described in detail with reference to illustrative drawings.

The left and right steering front wheels 1, 1 and the driving rear wheels 2, 2 are interlocked and connected to a case 3 by an internal gear transmission, and the left and right front wheels 1, 1 are provided so as to be able to rise and fall in opposite directions around the front and rear horizontal axis. In addition, a frame 5 equipped with an engine 4
is connected to the front side of the mission case 3, a boarding seat 6 is provided between the left and right rear wheels 2, and a control section 7 is arranged at the front of the seat to form a traveling body 8. A seedling planting device 11 is connected to the rear of the machine via a four-link mechanism 10 to which a rice transplanter 9 is connected, and can be driven up and down and rolled around the front and back axis, thereby configuring a riding type rice transplanter. There is.

In configuring the seedling planting device 11, the link mechanism 1
Planting case 1 connected to 0 so that it can roll freely
2, grounding floats 13 are arranged in parallel in the horizontal direction, and the power take-off shaft 14 of the mission case 3 and the input shaft 15 of the planting case 12 are interlocked and connected, and the floats are reciprocated with a constant stroke in the left and right direction. A movable seedling stand 16,
Mechanism 17 for planting seedlings on the mud surface after the float passes...
... is provided.

To attach the central grounding float 13 to the planting case 12, as shown in FIG.
2, the front side arm 19 and the bracket 21 at the front of the float are attached to the front side arm 19 and the bracket 21 at the front of the float.
are connected via the hip bending link mechanism 22, and the rear side arm 20 and the bracket 23 at the rear of the float are connected to the horizontal shaft 2.
4, and by changing and fixing the swinging position of the rear arm 20, the float 13 is moved vertically in parallel, thereby changing the seedling planting depth while keeping the float posture constant. It's like this.

As shown in FIGS. 1 to 3, a mechanism 25 for biasing the front side of the float 13 in the downward direction is provided so that the biasing force can be artificially changed and set, and the float 13 is caused to swing up and down. A mechanism 2 for automatically driving and lowering the seedling planting device 11 to maintain the float 13 in a set posture as the seedling planting device 11 moves up and down.
6 is provided, and a mechanism 27 for changing the setting attitude of the float 13 is provided, and the urging force change setting mechanism 25 and the setting attitude change mechanism 27 are interlocked and connected by an interlocking mechanism 43 to change and set the urging force and the float 13. 13 setting postures can be changed simultaneously using one operating tool 28.

The urging force change setting mechanism 26 is constructed by extending the lower link 22a of the bending link mechanism 22 beyond the bending axis, and extending the upper link 22b beyond the axis of connection to the arm 19. A member 29 is connected to the extension part, and the operating tool 28 is provided on one side of the seat 6 so as to be swingable around the horizontal axis 30. An inner wire 31a and a tension spring 32 connected to the inner wire 31a are provided over the extension portion, and the spring 32 is connected to the lower link side, and an outer wire 31b is arranged and fixed near the interlocking arm 47. It is provided across the member 33 and the connecting member 29.

To configure the seedling planting device elevating mechanism 26, the drive device 9 is composed of a cylinder 34 connected to the upper link 10a of the quadruple link mechanism 10, and a valve 35 for controlling the cylinder 34, and a control valve 35 for controlling the cylinder 34. A shift fork 36 for pushing and pulling the spool 35a as a part is provided on the shaft 37, and an arm 38 equipped with a return spring 52 is connected to the shaft 37. The outer wire 39b is connected to the holder 41 of the posture changing mechanism 27, which will be described later, near the arm connection part of the upper link 22b, thereby preventing the float 13 from being caused by unevenness of the tiller. Seedling planting device 1
1 is driven up and down, and the float 13 is automatically maintained in a set posture.

A boss 49 of an operating tool 48 is fitted onto the shift fork shaft 37, and the operating tool 48 is positioned on the opposite side of the seat 6 from the urging force setting operating tool 28, and a ball detent mechanism is installed. Valve spool 35 by 50
An arm 51 for maintaining the seedling planting device 11 in a neutral state is connected to the boss 49, so that the lifting position of the seedling planting device 11 can be fixed by the action of the ball detent mechanism 50 that resists the downward biasing force of the float 13. The seedling planting device 11 can be manually raised by operating the operating tool 48 that resists the downward biasing force of the float 13, and by removing the arm 51 from the spool operation area, the automatic lifting mechanism 26 is configured to be switched to an automatic control mode that follows the vertical movement of the float 13.

To configure the attitude changing mechanism 27, a U-shaped holder 41 for engaging the outer wire is loosely fitted onto a shaft 40 parallel to the swing axis 30 of the operating tool 28, and a U-shaped holder 41 is positioned on the outside of the holder 41. A fixing member 42 is provided on the shaft 40, and a long hole a is bored in the fixing member 42 around the shaft 40, and the holder 41 is inserted through the long hole a.
A bolt b is provided to be screwed into the shaft 4 of the holder 41.
By fixing the swinging position around 0, the stretching and absorbing operation of the inner wire 39a can be easily performed from the outside of the machine body, and the other end of the shaft 40 and the operating tool 28 are each The arms 44 and 45 are arranged in series, and the arms 44 and 45 are interlocked and connected to each other by a member 46, and the arms 44 and 45 and the interlocking member 46 are connected to each other by an interlocking mechanism 43.
As a result, the set posture of the float 13 is automatically and reversibly changed to a forward-upward position by the swinging operation of one operating tool 28, as the biasing force of the biasing force change setting mechanism 25 is changed to a larger biasing force. It's like this.

In the interlocking mechanism 43, the connecting hole c of the inner wire 31a to the arm 47, and the arm 44
By providing the connecting holes d of the interlocking member 46 in the outer wire 39b connected to the outer wire 39b at intervals in the radial direction around the shaft 30, and changing the connecting points,
The interlocking relationship between the urging force by the operating tool 28 and the float setting attitude angle is configured to be changeable.

Incidentally, the present invention may be applied to a walking type rice transplanter.

[Brief explanation of drawings]

The drawings illustrate embodiments of the rice transplanter according to the present invention, and the first
The figure is an overall side view, FIG. 2 is a control system diagram, and FIG. 3 is a detailed diagram of the operating tools. 11...Seedling planting device, 13...Grounding float, 25...Biasing force change setting mechanism, 26
... Automatic lifting mechanism, 27 ... Float setting attitude change mechanism.

Claims (1)

[Claims] 1. A grounding float 13 is provided so as to be able to swing up and down around a horizontal axis on the rear side, and a mechanism 25 for urging the front side of the float 13 in the downward direction is provided so that the urging force can be changed and set. A mechanism 26 is provided to automatically drive the seedling planting device 11 up and down in order to maintain the float 13 in a set posture as the float 13 is vertically oscillated.
The rice transplanter is equipped with a mechanism 27 for changing the setting posture of the rice transplanter, wherein the urging force change setting mechanism 25 and the setting posture changing mechanism 27 are automatically and reversibly changed in accordance with a change setting to increase the urging force. , a rice transplanter characterized in that the set posture of the float 13 is interlocked and connected so that the set posture is as forward as possible.