JPS6024096Y2 - 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 operation mechanism of the drive lifting device are linked and linked via a release wire, and the seedling planting device is set at a certain target on 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 level, and the position of the outer wire end of the release wire near the operating mechanism is configured to be changeable, so that the biasing force of the biasing mechanism can be freely changed. Regarding the riding rice transplanter.

With this type of device, the planting depth of seedlings in the rice field can be made constant by detecting the ground reaction force.
For example, for types equipped with floats for leveling the ground,
In areas with soft mud or 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 soil pushed out by the float, so the seedling planting device reduces the ground pressure of the ground level detection mechanism. On the other hand, the level of the seedling planting device tends to fluctuate even with small irregularities such as on hard muddy soil, which causes a difference in the sinking depth of the floats at both the left and right ends. When the seedling planting device tilts to either the left or right, or when one side of the float entirely lifts off the ground, the ground support becomes unstable, so increase the ground pressure of the ground level detection mechanism. 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 seedling planting device so that it tends to be biased downward from a predetermined level. In order to change the control tendency, various complicated configurations are adopted, which poses a particular problem in terms of cost.

In view of the above points, the present invention enables changing the control tendency of the seedling planting device on the planting mud surface with an extremely simple structure, and prevents wear between the inner wire and the outer wire end. The purpose is to make it possible to easily change the control tendency while avoiding the problem.

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.
, six sets of seedling planting mechanisms 4 take out a predetermined amount of seedling blocks and plant them in the rice field. A model rice transplanter 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 by a pin 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 towing vehicle 1, so that as the lift arms 10, 10 swing up and down, The seedling planting device 2 is configured to swing up and down around the front end pivot point Q of the lower link 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 is provided which is always biased toward the ground side over the
After smoothing out the marks of the wheels 12 and unevenness of the rice field with the corrugated plate 13, the rice field for planting is leveled with the leveling bodies 11.

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 the 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 earth leveling body 11... is pivotally connected via ., and each earth leveling body 11... is pivoted to an intermediate pivot point P... according to a change in the relative distance between the seedling planting device 2 and the field surface. It is constructed so that it can swing up and down around the center.

The arms 14..., 17... are connected by a link 19..., and by adjusting the rotation of the support shaft 16, the arms 14... are swung to set the intermediate pivot point P of the ground leveling body 11... It is configured so that the planting depth can be adjusted by changing the position up and down with respect to the attached 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 rice field surface, and automatically controls the raising and lowering of the seedling planting device 2 based on the detection result. A control mechanism 21 is configured and will be explained below.

That is, the bracket 15 is pivotally supported on one end of the L-shaped arm 22 that is pivotally supported on the arm 14, and (2) the other end of the L-shaped arm 22 is used as an urging mechanism that applies ground pressure to the ground level detection mechanism. A tension spring 23 is interposed,
The above-mentioned arm 22 is always urged to swing downward, and the L is adjusted according to changes in the ground reaction force received by the ground leveling body 11.
The mold arm 22 is configured to swing.

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, which operates the valve 26 to automatically control the raising and lowering of the seedling planting device 2 so that the planting depth can be made constant. It is composed of

As clearly shown in FIGS. 3 and 4, the floating control device 28 swings a downwardly opened U-shaped engagement rod 30 around a horizontal axis 21 on a fan-shaped guide plate 29 when viewed from the side. A control lever 31 is pivotally connected to the engaging rod 30 so as to be swingable around an axis 12 perpendicular to the horizontal axis P0, 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 fixing position of the end of the inner wire 24a can be changed along the longitudinal direction of the inner wire 24a.

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 screw 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 the 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 The state in which the pressing force against
The valve 26 is automatically controlled and operated by 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. If the operating lever 31 is operated to the swinging operation limit point 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 is By directing the openings of the engagement grooves 34, 34 drilled in the R 30 in the lateral direction, the protrusions 36, 36 are removed from the engagement R 34, 34.
The seedling planting device 2 is configured to be released laterally along the release wire 24, so that the seedling planting device 2 can be attached to the towing vehicle 1.
or when the seedling planting device 2 is removed in order to attach another working device, the above-mentioned device whose end is connected to the ground level detection mechanism of the seedling planting device 2. To connect or disconnect the release wire 24 to the control mechanism 21 provided on the towing vehicle 1 side, the operating lever 31 is swung to the operating limit on the side closer to the towing vehicle 1 and then fixed. Place the engaging member 35 on the guide 37 on the tow vehicle 1 side, engage the protrusion 36 in the engagement groove 34, and swing the operating lever 31 in the opposite direction away from the tow vehicle 1 to engage. While keeping the member 35 as close as possible to the rotating member 27, the end of the inner wire 24a can also be brought close to the rotating member 27 to facilitate mutual connection, and on the other hand, it is also easy to disconnect the connection by reversing the operation described above. The overall structure is such that these operations can be performed extremely easily.

(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 42 for the drive lifting 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 and the inner wire 24a end position can be changed approximately one-dimensionally in the distance direction by changing the operation position of the swing lever 31, and the release wire 24 innerwaf
The guide 37 along the inner wire 24a is connected to the outer wire 24b.
It is characterized by being provided below the end.

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. , the position of the end of the outer wire 24b near the operating mechanism 42 of the release wire 24 can be changed by a simple operation by operating the swing lever 31 on the tow vehicle side; 37 is provided below the end of the outer wire 24b, and as the lever 31 swings, the outer wire 24b
The movement posture and direction of the end portion are guided by the guide 37 in a linear direction along the inner wire 24a, and the lever 31
and the end of the outer wire 24b, the end of the outer wire 24b moves along a circular locus to create a bent part between it and the inner wire 24a,
In particular, it is possible to reliably avoid problems that are common with rocking types, such as wear and tear on the inner wire 24a, and
When the engaging member 35 at the end of the outer wire 24b is engaged and disengaged from the engaging groove 34 of the swing lever 31, the engaging member 35 is reliably guided to the engaging groove 34, and the engaging/disengaging operation is performed. This can be done very easily with one hand.

[Brief Description of the Drawings] The drawings illustrate embodiments 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 parts, and Figure 3 is an enlarged side view of the main parts. FIG. 4 is a rear view of the main part, and an explanatory view of the mode of operation of A and M in FIG. 5. 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, -(2...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 for automatically controlling the drive lifting device 25 is provided in order to maintain the outer
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 guide 37 along the inner wire 24a of the release wire 24 is connected to the outer wire 2.
A riding rice transplanter characterized in that it is installed below the 4b end.