JPH0114096Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a riding rice transplanter having a float that can swing up and down and automatically controls the raising and lowering of the planting device by detecting the ground load based on the vertical displacement of the swinging fulcrum.

For example, the riding rice transplanter with the above configuration requires frequent elevation control due to the presence of local irregularities in the mud surface, compared to one that automatically controls the raising and lowering of the planting device based on the amount of rocking displacement of the tip of the float. It has the advantage of being able to perform good control with less risk of adverse effects. And this kind of riding rice transplanter,
In particular, in the case of multi-row type rice transplanters, the planting width of the planting device is larger than the width of the traveling machine body, so when driving on the road, the planting device is generally removed from the traveling machine body and the planting device is removed from the machine body. A means of transportation is adopted in which the device is towed in a vertical position via auxiliary wheels attached to the device. However, in this type of riding rice transplanter, as mentioned above, the swinging fulcrum of the float is configured to be able to move vertically to control the automatic elevation of the planting device, so the float may sag when transported on the road. There was a risk of damage due to sliding contact with the ground.

In view of the above-mentioned circumstances, the purpose of the present invention is to make it possible to easily avoid damage to the float during transportation on the road. The present invention is characterized in that it is provided with a fixed holding mechanism that fixes and holds the swinging fulcrum of the float when it is raised to or above the current position relative to the main machine, and a fixed holding mechanism that fixes and holds the tip of the float.

With this, when the planting device is towed in a vertical position, the float can be fixed and held at the position relative to the main machine that has risen due to the ground reaction force during rice planting work, or in a state where it has been raised higher. As a result, damage caused by the hanging of the float as in the conventional method can be reliably avoided, and the planting device can be safely and efficiently towed and transported when traveling on the road.

In addition, if the fixed holding mechanism that fixedly holds the swinging fulcrum of the float is one that locks and holds a wire for linking the float and an automatic lifting control mechanism for the planting device, the automatic lifting control It has the advantage that it can be easily configured by using the above-mentioned linking wire that is originally attached to the device.

Embodiments of the present invention will be described below based on the drawings.

Figure 1 shows a rear-mounted riding rice transplanter, in which a seedling stand 2 is installed at the rear of a tractor 1 that can be moved back and forth in left and right directions, and a seedling block for planting is taken out from this seedling stand 2 and planted in a rice field. A planting mechanism 3 for planting, a planting case 4 in which these drive mechanisms are installed, and a planting device 6 for planting six rows consisting of a float 5 having a planting surface leveling function are connected so as to be able to rise and fall.

A pair of left and right lower links 7 and an upper link 8 are pivotally connected to the planting case 4 of the planting device 6 in a concentric manner, and the lower links 7
The front end of the upper link 8 is removably attached to the rear hitch 9 of the tractor 1, and the front end of the upper link 8 is attached to a hydraulically driven lift arm 11 for raising and lowering an attachment provided on the upper part of the rear transmission case 10 of the tractor 1. The lift arm 11
By vertically swinging the planting device 6 , the planting device 6 is driven up and down using the front end pivot of the lower link 7 as a fulcrum.

The support structure for the float 5 is constructed as shown in FIGS. 3 and 4.

That is, in the front part of the planting case 4, a support shaft 12 that can be freely rotated and fixed around the horizontal axis is installed, and the first arm 13 arranged in parallel with this support shaft 12 and the front end of each of the floats 5 are connected to each other. A bent link 14 is interposed between each, and the second arm 15 pivotally connected near the seedling take-out point of the planting device 6 and the first arm 13 are pivotally connected via a link 16, and A bracket 17 connected to the longitudinal center of each of the floats 5 is pivotally attached to the rear end of the second arm 15 so that the mounting position can be changed up and down . Each float 5 is moved to the rear swing fulcrum P according to the change in relative distance to the surface.
The planting depth can be adjusted by structuring the float 5 so that it can swing up and down around it, and by positioning the rear swing fulcrum P of the float 5 up and down as the first arm 13 rotates around the support shaft 12 axis. It is configured to adjust.

A swingable L-shaped arm 18 is interposed between the bracket 17 of one of the floats 5 and the corresponding second arm 15, and one end of this L-shaped arm 18 and the second Between the U-shaped member 19 fixed to the arm 15,
Spring 20 that urges the float 5 to move downward
The float 5 is connected to its swinging fulcrum P by interposing
It is configured to double as a sensor float that detects the ground load with vertical displacement of .

A mechanism 21 is provided to automatically control the raising and lowering of the planting device 6 based on the detection results of the sensor float 5, and the sensor float 5 is fixedly held in a raised state at or above the position relative to the main machine during rice planting work. A mechanism 22 is provided.

The automatic elevation control mechanism 21 is constructed as follows.

That is, the rear transmission case 10 of the tractor 1 is equipped with a hydraulic cylinder 23 that controls the vertical swing of the lift arm 11, and the operating arm 24A of the control valve 24 for this hydraulic cylinder 23 and the receiver 25 provided on the valve case One end of the inner wire 26A and one end of the outer wire 26B constituting the release wire 26 are detachably connected, and the other ends of both wires 26A, 26B are connected to one end of the L-shaped arm 18 and the second end of the inner wire 26A and the outer wire 26B.
By connecting to receivers 27 provided at the front end of the arm 15, and operating the valve 24 via the L-shaped arm 18 and the release wire 26 based on the vertical displacement of the sensor float 5. , the planting device 6 is automatically controlled to move up and down to keep the planting depth constant or almost constant.

Fixing and holding mechanism 22 for the sensor float 5
In this case, a locking pin 28 and a receiver 29 for one end of the inner wire 26A and the outer wire 26B are fixed to a box-shaped case 37 provided between the front ends of the pair of left and right lower links 7, and a control valve is installed. By locking and holding the release wire 26 removed from the operation arm 24A of 24 and the receiver 25 in a tensioned state, the rear part of the sensor float 5 is raised to the position relative to the main machine during rice transplanting work or higher. It is configured to be fixedly held.

In addition, a float 5 is attached to the bent link 14.
When the front part is raised to the main machine position or higher during rice transplanting work, a hook-shaped locking tool 35 that can be fitted and engaged with a pin 34 provided on the first arm 13 is attached and fixed. A holding mechanism 36 is configured.

As shown in FIG. 2, when the auxiliary running wheels 30 are attached to the planting device 6 removed from the tractor 1 and the planting device 6 is towed and transported in a vertical position, the front part of each float 5 and the rear part of the sensor float 5 are It is configured to be fixed and held at the position relative to the main machine during rice planting work or in a raised state.

FIG. 5 shows another fixing and holding mechanism 22 for the sensor float 5, in which a locking pin 31 is connected to the U-shaped member 19, and the swinging fulcrum P
The pin 32 constituting the is provided with a hook-shaped locking tool 33 that can be fitted and engaged with the pin 31 only when the rear part of the sensor float 5 is raised to or above the position relative to the main machine during rice planting work. It is fitted with.

[Brief explanation of the drawing]

The drawings show an embodiment of the riding rice transplanter according to the present invention, and Fig. 1 is an overall side view during rice planting work;
FIG. 2 is a plan view when the vehicle is running on the road, FIG. 3 is a control system diagram of the main parts, FIG. 4 is a plan view of the main parts, and FIG. 5 is a perspective view showing another embodiment. 5...Float, 6 ...Planting device, 21 ...
automatic lifting control mechanism, 22 , 36... fixed holding mechanism, 26... wire.

Claims (1)

[Scope of Claim for Utility Model Registration] A riding rice transplanter having a float 5 which can be vertically oscillated and which detects the ground load by vertical displacement of its oscillating fulcrum P and automatically controls the raising and lowering of the planting device 6, A fixed holding mechanism 22 that fixedly holds the swinging fulcrum P of the float 5 in a state in which the float 5 is raised to the position relative to the main machine during rice transplanting work or higher; and a fixed holding mechanism that holds the tip of the float 5 fixedly. A riding rice transplanter characterized by being provided with 36. A fixed holding mechanism 22 that fixedly holds the swinging fulcrum P of the float 5 is a utility model that locks and holds a wire 26 for linking the float 5 and an automatic lifting control mechanism 21 for the planting device 6 . A riding rice transplanter according to the registered claims.