JPS6024095Y2 - Riding rice transplanter - Google Patents

Description

[Detailed description of the invention] The present invention connects a seedling planting device to a drive lifting device equipped on a towing vehicle, and equips the seedling planting device with a ground level detection mechanism that is applied with ground pressure by a biasing mechanism. The ground level detection mechanism and the operating mechanism of the driving lifting device are linked and linked via a release wire, and the seedling planting device is set at a certain level with respect to the planting mud surface based on the detection result by the ground level detection mechanism. A mechanism is provided for automatically controlling the drive lifting device to maintain the same, and the position of the outer wire end of the release wire near the operating mechanism is changeable,
The present invention relates to a riding rice transplanter in which the biasing force of the biasing mechanism is configured to be changeable.

With this type, the planting depth of seedlings in the rice field can be made constant by detecting the ground reaction force. In areas where there is a lot of mounds of soil at the tip of the float, there is a risk of the already planted seedlings being knocked over by the muddy water or mud pressed by the float, so the ground pressure of the ground level detection mechanism is reduced and the seedling planting device is operated. On the other hand, the level of the seedling planting device tends to fluctuate even with small irregularities such as on hard muddy soil, and there is a difference in the sinking depth of the floats at both ends. When the seedling planting device is tilted to either the left or right, or when the float on one side is completely lifted off the ground, the ground support becomes unstable, so the ground pressure of the ground level detection mechanism is increased and the seedlings are planted. It is necessary to change the control tendency of the seedling planting device on the planting mud surface depending on the field conditions, such as controlling the position of the planting device so that it tends to be biased downward from a predetermined level. In order to change the trend, various complicated configurations are adopted, which poses a particular problem in terms of cost.

In view of the above points, the present invention enables the control tendency of the seedling planting device for the planting mud surface to be changed with an extremely simple structure, and furthermore, so that the changing operation can be easily performed. It is an object of the present invention to make it possible to easily attach and detach an outer wire when connecting and disconnecting an attached device to a tow vehicle.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

A seedling planting device 2 for planting six rows is pivotally connected to the rear of the towing vehicle 1 so as to be able to rise and fall freely, and a seedling mounting table 3 is movable back and forth in the lateral direction of the machine.
The device is configured to take out a predetermined amount of seedling blocks and plant them in the rice field using six seedling planting mechanisms 4. The machine is configured.

In the planting case 5 of the seedling planting device 2, a pair of left and right lower links 6.6 and an upper link 7. While being pivotally connected to the hitch 8, the upper link 7.
The front end of 7 is connected to a hydraulically driven lift arm 10.10 for raising and lowering an attachment provided on the upper part of the rear transmission case 9 of the tow vehicle 1, and as a result, as the lift arms 10, 10 swing up and down, The seedling planting device 2 is constructed to swing up and down centering around a pivot point Q at the front end of the upper links 6, 6.

At the bottom of the seedling planting device 2, four hollow float-like ground leveling bodies 11 made of synthetic resin are arranged side by side, and between the front side and the rear wheel 12, the width of the seedling planting device 2 is almost the entire width. A corrugated plate 13 that is always biased towards the ground contact side is provided over the area, and after leveling the marks of the wheels 12 and unevenness of the rice field with the corrugated plate 13, the field for planting is leveled with the leveling body 11. It is structured so that it will continue.

The ground leveling body 11... has, in its longitudinal intermediate portion,
Arm 1 is concentrically and pivotally supported at the rear of planting case 5.
A bending link 18 is attached to an arm 17 which is pivotally attached to an arm 17 via a bracket 15 and juxtaposed to a support shaft 16 which is rotatably and horizontally supported on the front part of the planting case 5.
Near the front end of each soil leveling body 11... is pivotally connected via..., and each soil leveling body 11... is pivoted to the intermediate pivot point P according to changes in the relative distance between the seedling planting device 2 and the circular surface. It is configured to be able to swing up and down around...

Both the arms 14...17... are connected by links 19..., and by adjusting the rotation of the support shaft 16, the arms 14... are swung, and the intermediate pivot point P of the earth leveling body 11... is planted. It is configured so that the planting depth can be adjusted by changing the position up and down with respect to the case 5.

Also, the brackets 15 of the ground leveling bodies 11 are also provided with a plurality of pivot connection holes 20 in the vertical direction, and by changing the connection position between the arms 14 and the brackets 15... The plant is also constructed so that the planting depth can be adjusted.

One of the ground leveling bodies 11 operates as a ground level detection mechanism that detects the relative distance between the seedling planting device 2 and the circular surface, and automatically controls the raising and lowering of the seedling planting device 2 based on the detection result. The control mechanism 21 is configured as described below.

That is, the bracket 15 is pivotally supported on one end of the L-shaped arm 22 that is pivotally supported by the arm 14, and
A tension spring 23 as a biasing mechanism that applies ground pressure to the ground level detection mechanism is interposed at the other end of the ground level detecting mechanism 2, and the arm 22 is always biased to swing downward, and the ground leveling body 11 The L-shaped arm 22 is configured to swing in response to changes in ground reaction force received by the L-shaped arm 22.

One end of an inner wire 24a of a release wire 24 is connected to the other end of the above-mentioned arm 22, and one end of an outer wire 24b of the release wire 24 is supported by a connecting portion between the arm 14 and the link 19. The other end of the inner wire 24a is connected to a control valve 2 for a single-acting hydraulic cylinder 25 that drives the lift arm 10 up and down.
6, and the other end of the outer wire 24b is connected to a floating control device 28 provided on the tow vehicle 1 side so that its position can be changed and fixed, The swinging displacement of the mold arm 22 is transmitted to the rotating member 27 via the release wire 24, and the valve 26 is actuated to automatically raise and lower the seedling planting device 2 so that the planting depth can be made constant. It is configured.

As clearly shown in FIGS. 3 and 4, the floating control device 28 swings a U-shaped engagement rod 30 opened downward around the horizontal axis 11 on a fan-shaped guide plate 29 when viewed from the side. An operation lever 31 is pivotally connected to the engaging rod 30 so as to be swingable around an axis 12 orthogonal to the horizontal axis P1, and is bored in the upper part of the guide plate 29. of,
The lever 31 is configured to be swingable along a guide groove 33 having a wavy stepped locking portion 32, and an outer wire is inserted into the engagement grooves 34, 34 cut out from the lower end of the engagement rod 30. The protrusions 36, 36 are configured to engage with an engaging member 35 connected to the end of the lever 24b, and as the operating lever 31 is swung, the engaging member 35 is
The upper surface of the inner wire 24a is configured to be reciprocated within a predetermined range while being along a guide 37 that is configured substantially parallel to the longitudinal direction of the inner wire 24a.
The structure is such that the fixing position of the end of the inner wire 24 can be changed along the longitudinal direction of the inner wire 24.

Reference numeral 38 in the figure denotes a coiled spring interposed between the lever 31 and the engagement rod 30, which is configured to always bias the lever 31 toward the locking portion 32 around the axis 12. 31 can be maintained at a predetermined operating position.

The engaging member 35 is attached to a threaded portion 39 at the end of the outer wire 24b via a nut 40, 40 so that the position can be changed and fixed in the longitudinal direction of the outer wire 24b. The screw type adjustment mechanism 41 is configured so that changes in control tendency can be finely adjusted by changing the attachment position to the outer wire 24b.

With the above configuration, when the lever 31 is swung to the side A away from the towing vehicle 1, the biasing force of the tension spring 23 in the non-controlled state where the valve 26 is in the neutral position is reduced and the ground leveling body 11 is The phantom pressing force is reduced, that is, the valve 26 becomes stable with a slight floating state, and as a result, the valve 26 is automatically controlled with a relatively weak ground reaction force.

On the other hand, when the lever 31 is swung toward the side B approaching the tow vehicle 1, the pressing force of the ground leveling body 11 against the ground increases, that is, it becomes stable with a slight sinking state, and a relatively strong ground reaction force is generated. Thus, the valve 26 is operated in a controlled manner.

At the end of the guide groove 33 on the towing vehicle 1 side, a long groove portion 33a is formed with an interval approximately equal to the diameter of the lever 31, and the end thereof is configured as a stopper 43 that can prevent movement of the lever 31. When the operating lever 31 is operated to the limit point for swinging in the direction toward the towing vehicle 1, the operating lever 31 is engaged and held by the friction received from the long groove portion 33a, and in this state, the engaging rod 30 The engagement grooves 34, 34 formed in the release wire 24 are preferably configured so that the projections 36, 36 can be disengaged from the engagement grooves 34, 34 in the lateral direction along the release wire 24 by orienting their openings in the lateral direction. When attaching the seedling planting device 2 to the towing vehicle 1 or removing the seedling planting device 2 to attach other working devices, the seedling planting device 2 is attached to the ground. The control lever 3 is used to connect or disconnect the release wire 24, whose end is connected to the level detection mechanism, to a control mechanism provided on the tow vehicle 1 side.
1 is swung to the operating limit point on the side closer to the tow vehicle 1 and fixed, and then the engaging member 35 is moved to the guide 37 on the tow vehicle 1 side.
While the protrusion 36 is engaged with the engaging groove 34, the operating lever 31 is swung in the opposite direction away from the towing vehicle 1, so that the engaging member 35 is brought as close as possible to the rotating member 27. However, the ends of the inner wires 24a can also be brought close to the rotating member 27 to facilitate mutual connection, and on the other hand, it is also possible to easily disconnect the connections by performing the operations opposite to those described above, making these operations extremely easy as a whole. It is configured as follows.

(See A and A in Figure 5) A hydraulic cylinder 2 is used to drive and lower the seedling planting device 2.
5, various types of drive elevating devices 25 can be applied.

Note that the present invention is not limited to the case where one of the ground leveling bodies 11 is used to detect the ground level of the seedling planting device 2 as in the above embodiment; It can also be applied to devices that use a support to detect the ground level, or those that have a special member for detecting the ground level.
The ground leveling body 11, the support, special members, etc. are collectively referred to as a ground level detection mechanism.

The rotating member 27 and the control valve 26 are collectively referred to as an operating mechanism (2) for the drive elevating device 25.

In summary, the present invention provides an officially registered riding rice transplanter in which an engaging member 35 is provided at the end of the outer wire 24b of the release wire 24 near the operating mechanism 42, and the engaging member 35 is engaged with the retaining member 35. A swinging lever 31 having an engaging rod 30 formed with an engaging groove 34 in a downwardly open state at its tip is configured to be movable and fixed in its operating position.
The outer wire 24b end position can be freely changed in a substantially one-dimensional distance direction with respect to the inner wire 24a end position by changing the operating position of the swing lever 31; The swinging lever 31 is provided in a swingable state to a position where the retaining member 35 that moves linearly at the end of the outer wire 24b is removed from the engagement groove 34 where the par 31 swings and displaces. characterized by something.

In other words, in the control mechanism for keeping the planting depth constant with respect to the planting mud surface of the seedling planting device 2, the operation for changing the ground pressure by the ground level detection mechanism according to the properties of the planting mud surface is performed. Although the operation of the release wire 24 can be performed simply by changing the position of the end of the outer wire 24b near the tMit 42 by operating the swinging lever 31 on the towing vehicle 1 side, the swinging of the swinging lever 31 is The swing lever 3 is moved to a position where the linearly moving engagement member 35 of the end of the outer wire 24b is released from the dynamically displaced engagement groove 34.
1, the inner wire 24a end and the outer wire 24b end of the release wire whose position is changed in one dimension can be moved by simply operating the swing lever 31 provided on the tow vehicle 1 side. The operation mechanism 42 and the swing lever 31 can be easily attached and detached from the engagement groove 34, and the seedling planting device 2 can be easily connected and disconnected from the tractor 1.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the riding rice transplanter according to the present invention. Figure 1 is an overall side view, Figure 2 is a side view of the main part, Figure 3 is an enlarged side view of the main part, and Figure 4 is an essential part. FIG. 6 is a rear view of the part, A of FIG. DESCRIPTION OF SYMBOLS 1... Traction vehicle, 2... Seedling planting device, 24... Release wire, 24a... Inner wire, 24b...
・Outer wire, 25... Drive lifting device, 31...
- Lever 42...operation mechanism.

Claims (1)

[Scope of utility model registration request] The seedling planting device 2 is connected to a driving lifting device 25 equipped on the towing vehicle 1, and a ground level detection mechanism to which ground pressure is applied by the biasing mechanism 23 is provided in the seedling planting device 2, and the ground level detection mechanism and The operation mechanism 42 of the drive lifting device 25 is linked and linked via the release wire 24, and the seedling planting device 2 is brought to a certain target level with respect to the planting mud surface based on the detection result by the ground level detection mechanism. In addition, a mechanism is provided to automatically control the drive lifting device 25 in order to maintain the operation.
The riding rice transplanter is configured such that the position of the end of the wire 24b can be changed to change the urging force of the urging mechanism 23, and the end of the outer wire 24b of the release wire 24 near the operating mechanism 42. is provided with an engaging member 35, and a swinging lever 31 having an engaging rod 30 formed with an engaging groove 34 in a downwardly open state that engages with the engaging member 35 at its tip, is moved to the operating position. It is configured to be fixable and provided on the tow vehicle 1 side, and by changing the operation position of the swing lever 31, the end position of the outer wire 24b is moved in a substantially one-dimensional distance direction with respect to the end of the inner wire 24a. The swing lever 31 is configured to be freely changeable, and the swing lever 31 is rocked to a position where the linearly movable engagement member 35 of the end of the outer wire 24b is released from the engagement groove 34 where the swing lever 31 swings. A riding rice transplanter characterized in that it is installed in a movable state.