JPS6024098Y2 - 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 together via a release wire, and the seedling planting device is set at a certain target 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 release wire, and the position of the outer wire end of the release wire near the operating mechanism is changeable, so that the urging force of the urging mechanism is configured to be changeable. Regarding riding rice transplanters.

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 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.
From there, six sets of seedling planting mechanisms 4... are configured to take out a predetermined amount of fallen seedlings and plant them in the rice field, thereby continuously planting seedlings in the rice field as the vehicle travels. The riding-type rice transplanter is constructed as follows.

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, a small hollow float-like ground leveling body 11 made of synthetic resin is juxtaposed, and between the front side and the rear wheel 12, the width of the seedling planting device 2 is almost the full width. A corrugated plate 13 is provided which is always biased toward the ground side over the
After leveling the marks of the wheels 12 and unevenness of the rice field with the corrugated plate 13, the rice field surface 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.
4... via a bracket 15..., and is bent into an arm 17... which is juxtaposed and protrudes from a support shaft 16 which is rotatably fixed to the front part of the planting case 5. Link 1
Near the front end of each soil leveling body 11... is pivotally connected via . It is configured to be able to swing up and down around...

Both the arms 14...17... are connected by a link 19..., and by adjusting the pivot 16 to swing the arms 14..., the intermediate pivot point P of the ground 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 rice field surface, and automatically controls the raising and lowering of the seedling planting device 2 based on the detection result. A control mechanism is constructed 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 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, which operates the valve 26 to automatically control the raising and lowering of the seedling planting device 2, thereby making it possible to maintain a constant planting depth. It is configured as follows.

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 41 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 able to swing along a guide groove 33 having a wavy stepped locking portion 32, and an outer wire is inserted into a retaining groove 34, 34 cut out from the lower end of the engaging 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 engagement member 35 is attached to the threaded portion 39 at the end of the outer wire 24b via nuts 40, 40 so that its 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 tow vehicle 1 side, a long groove portion 33a is formed at an interval approximately equal to the diameter of the lever 31, and the end thereof is configured as a stopper 43 that can prevent the lever 31 from moving Sif+. , its operating lever 31
When the operating lever 31 is operated to the limit point for swinging in the direction of one example of the tow vehicle, 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 is engaged with the drilled part. The projection 36.3 is removed from this engagement R34,34 by the engagement 134,34 orienting its opening laterally.
6 is configured so that it can be detached in the lateral direction along the release wire 24, so that when attaching the seedling planting device 2 to the tow vehicle 1, or in order to attach another working device, the seedling planting device 2 When the device 2 is to be removed, the release wire 24, whose end is connected to the ground level detection mechanism of the seedling planting device 2, is provided on the tow vehicle 1 side and the control mechanism can be connected or disconnected at once. To do this, the operating lever 31 is swung to its operating limit on the side closer to the tow vehicle 1 and fixed, and then the engaging member 35 is placed on the guide 37 on the tow vehicle 1 side and the protrusion 36 is While engaging the engagement groove 34, the operating lever 31 is swung in the opposite direction away from the towing vehicle 1, and while the retaining member 35 is brought as close as possible to the rotating member 27, the end of the inner wire 24a is moved. The structure is such that the parts can be brought close to the rotating member 27 to facilitate mutual connection, and on the other hand, the connection can be easily disconnected by performing the operation opposite to the above-mentioned case, so that these operations can be performed extremely easily as a whole. .

(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.
By displacing the operating position of the swing lever 31, the end position of the outer wire 24b can be changed from the inner wire to the inner wire.
The outer wire 24a is configured to be movable in the near and far directions with respect to the end of the outer wire 24a, and is in an operating position where it can be engaged with and disengaged from the end of the outer wire 24b by one displacement of the swing lever 31. It is characterized in that a stopper 43 is provided to restrict the swinging of the swinging lever 31.

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. , tMf'143H of release wire 24?
Although the position of the end of the outer wire 24b near the outer wire 24b can be easily changed by operating the swinging lever 31 on the tow vehicle 1 side, the swinging lever 31 can be moved to a position regulated by the stopper 43. By swinging and displacing, the receiving and disengaging positions of the engagement groove 34 of the swing lever 31 with respect to the engagement member 35 at the end of the outer wire 24b are determined, and therefore the swing position of the swing lever 31 is confirmed. Even if there is no need to assemble the end of the outer wire 24b into the swing lever 31 and the operation is difficult to see, the outer wire 24 can be reliably assembled with one hand and by groping.
The b end can be positioned at a predetermined position for engagement and disengagement, making it extremely easy to connect and disconnect the seedling planting device 2 to the towing vehicle 1.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the riding rice transplanter according to the present invention,
Fig. 1 is an overall side view, Fig. 2 is a side view of the main part, Fig. 3 is an enlarged side view of the main part, Fig. 4 is a rear view of the main part, and Fig. It is an explanatory diagram. 1... Traction vehicle, 2... Seedling planting device, 2
4... Release wire, 24a... Inner wire, 24b... Outer wire, 2
5... 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 interlocked with the operating mechanism 42 via the release wire 24 to maintain the seedling planting device 2 at a constant target level with respect to the planting mud surface based on the detection result by the ground level detection mechanism. In order to achieve this, a mechanism for automatically controlling the drive lifting device 25 is provided, and an outer portion of the release wire 24 near the side 12 of the operating device is
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, which has an engaging rod 30 formed with an engaging groove 34 in a downward open state that engages with this retaining 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. A stopper U that restricts the swinging of the swinging lever 31 is provided at an operating position where the swinging lever 31 can be engaged with and disengaged from the end portion of the outer wire 24b by the swinging displacement of the swinging lever 31. A riding rice transplanter characterized by: