JPH0365130B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a system in which a sensor float is pivotably supported vertically about a rear fulcrum for a seedling planting device that is connected to this machine so as to be vertically movable. At the same time, the front fulcrum of the sensor float is supported so as to be relatively vertically movable by a support member provided in the seedling planting device so as to be able to freely swing vertically. The seedling planting device is configured to be controlled to raise and lower so that the vertical position of the front fulcrum with respect to the support member is within a set range, and the relative height of the sensor float with respect to the seedling planting device is changed by raising and lowering the rear fulcrum. The present invention relates to a paddy field working machine that is configured to adjust the planting depth, and is provided with a linkage mechanism that moves the front fulcrum up and down in the same direction as the rear fulcrum moves up and down in the same direction as the rear fulcrum moves up and down in adjusting the planting depth.

[Conventional technology]

Conventionally, in this type of paddy field work machine, the rear fulcrum of the sensor float is pivoted to be able to swing relative to one end of a bell crank that is loosely fitted to the planting depth adjustment operation shaft in a horizontal position. The front fulcrum of the sensor float is pivoted to a bell crank-shaped support member pivoted to the front end of the case via a bending link.
The free ends of the bell crank on the rear fulcrum side and the support member on the front fulcrum side are connected to each other so as to be able to swing relative to each other by a connecting rod, and the rear fulcrum is adjusted by the rotation work required to adjust the planting depth of the operating shaft. It was constructed so that when it was moved up and down, the front fulcrum was also raised and lowered by the same amount of vertical movement (Japanese Patent Laid-Open No. 102714/1983).

[Problem that the invention seeks to solve]

However, in a case where the vertical movement of the front and rear supports is set to be the same, the reference posture of the sensor float is simply parallel. The performance is good, and the seedling planting device moves up and down frequently.
The planting conditions of seedlings were not stable, causing floating and falling seedlings.

An object of the present invention is to provide a device that can solve the conventional problems by simply changing the amount of elevation of the front and rear supports relative to the seedling planting device when adjusting the seedling planting depth.

[Means for solving problems]

A feature of the present invention is that the linkage mechanism is configured such that the amount of vertical movement of the front fulcrum is smaller than the amount of vertical movement of the rear fulcrum, and its effects are as follows.

[Effect]

In other words, the amount of vertical movement of the rear fulcrum for adjusting the planting depth is set to be greater than the amount of vertical movement of the front fulcrum, so when the rear fulcrum is lowered for shallow planting, the amount of vertical movement of the rear fulcrum The amount of descent becomes greater than the amount of descent of the front fulcrum, and the sensor float assumes a forward upward posture compared to the posture before the planting depth adjustment. or,
When raising the rear fulcrum for deep planting, the amount of rise of the rear fulcrum will be greater than the amount of rise of the front fulcrum,
The sensor float will be in a lower position than before the planting depth adjustment.

〔Effect of the invention〕

As a result, in the case of shallow planting, the sensor float is in a relatively forward upward position, making it difficult for the sensor float to move up and down due to the ups and downs of the seedling planting device. The vertical movement of the device is suppressed, making it possible to stabilize planting even in soft fields, suppressing the phenomenon of floating seedlings and falling seedlings.In addition, when planting deeply, the sensor float moves forward and downward, allowing seedlings to be planted in a stable manner even in soft fields. The sensor float is likely to move up and down due to the ups and downs of the planting device, which means that the sensor sensitivity becomes more sensitive, reducing the mud pushing phenomenon caused by the float in hard fields, and even if the sensor sensitivity becomes a little sharper due to deep planting. The planting condition of seedlings has little effect.

As described above, by simply making changes to the amount of vertical movement of the front fulcrum for adjusting the planting depth, it is possible to ensure a good planting posture of the seedlings in any planting condition, and to improve the planting process. It can contribute to high efficiency.

〔Example〕

As shown in FIG. 4, at the rear end of this machine A, which has an engine 1 and a transmission case 2 at the front of the machine, and a driving section 3 in the middle, a seedling stand 4, a planting mechanism 5,
A seedling planting device B, which is composed of a planting case 10 that is transmission-connected to a transmission shaft 6 from this machine A, and a float group 7 that includes a sensor float 7A and two side floats 7B, is connected to a hydraulic cylinder. 8 are interlocked and connected via a link mechanism 9 that can be raised and lowered to form a riding rice transplanter.

Elevation control of the seedling planting device B will be explained in detail. As shown in FIG. 1, the front fulcrum P of the sensor float 7A and the support member 11 pivotally supported on the front end of the planting case 10 so as to be able to swing up and down are interlocked by a bending link 12, and the bending link 12 A spring 13 is attached that biases the body in the direction of expansion. The bending link 12 and an arm 16 fixed to an operating shaft 15 of a valve 14 that controls the hydraulic cylinder 8 are interlocked and connected by a wire mechanism 17 to transmit vertical swinging motion of the bending link 12 to the control valve 14. It is designed to do so. In other words, sensor float 7
When the bending link 12 is extended by a downward movement centering on the rear fulcrum Q, which will be described later, due to a decrease in the ground pressure at A, the inner wire 17a of the wire mechanism 17 is pulled and the spool 14a of the control valve 14 is actuated in the direction of the arrow. The hydraulic cylinder 8 is operated to lower the seedling planting device B, and the seedling planting device B is lowered to keep the distance l between the support member 11 and the front fulcrum P constant. On the other hand, when the ground pressure increases and the sensor float 7A lifts up, the seedling planting device B is raised to keep the distance l constant while keeping the seedling planting device B constant relative to the field surface. It is configured to be able to be raised and lowered to ensure a stable posture.

As shown in Figures 1 and 2, planting case 1
0 along the width direction of the aircraft.
is rotatably supported around its own axis, and a plurality of arms 19 fixed to this first horizontal support shaft 18 are connected to the rear support R of the two side floats 7B so as to be relatively swingable. It has been done. Further, the sensor float 7A has a rear fulcrum Q connected to one end of a swinging arm 21 which is pivotally supported to be vertically swingable on a second lateral support shaft 20 provided behind the lateral support shaft 18. is pivotally supported around the second horizontal support shaft 20 so as to be vertically swingable, and the other end of the swing arm 21 and the first
Since the horizontal support shaft 18 is connected with the link mechanism 22, the rotation of the first horizontal support shaft 18 about its own axis causes the side float 7B to be raised and lowered integrally with the side float 7B, thereby adjusting the planting depth. It is configured to be adjustable.

the second horizontal support shaft 20 and the support member 11
and the support shaft 23 which can be rotated integrally with the second
A linkage mechanism 27 consisting of a first arm 24 erected on the horizontal support shaft 20, a second arm 25 erected on the support shaft 23, and a connecting rod 26 connecting the first arm 24 and the second arm 25, By interlocking and connecting, the sensor float rear fulcrum Q is raised and lowered in conjunction with the rotational operation of the first horizontal support shaft 18,
The support member 11 is configured to swing up and down in the same direction as the rear fulcrum Q while keeping the distance l constant. Further, as shown in FIG. 3, the first arm 24 and the second arm 25 have the same length, and the length L ₁ of the support member 11 and the rear fulcrum Q of the bell crank-shaped arm 21 are the same. By setting the relationship with the length L ₂ of the connecting side to (L ₁ <L ₂ ), the rear fulcrum Q for the planting depth adjustment operation can be
The amount of vertical movement of the front fulcrum P is set to be smaller than the amount of vertical movement of the front fulcrum P. Therefore, if the sensor float 7A attempts to obtain a shallow planting state by moving downward and away from the seedling planting device B, it will tend to take a more forward upward position and attempt to obtain a deep planting state. This will put you in a forward-down position.

[Another example]

B. The means for expressing the difference in the amount of vertical movement of the rear fulcrums P and Q related to the planting depth adjustment is not limited to the method of setting the link length.

○B The paddy field working machine may be equipped with a fertilization device.

[Brief explanation of drawings]

The drawings show an embodiment of the paddy field working machine according to the present invention, FIG. 1 is a side view showing the state of connection between the seedling planting device and the raising/lowering valve of the seedling planting device, and FIG. 2 is a side view showing the relationship between the sensor float and the side float. FIG. 3 is a perspective view showing the state of attachment to the seedling planting device, FIG. 3 is an operation explanatory view showing the raising and lowering operation of the sensor float in adjusting the planting depth, and FIG. 4 is an overall side view. A... This machine, B... Seedling planting device, P... Front fulcrum, Q... Rear fulcrum, 7A... Sensor float, 2
7... Linkage mechanism.

Claims (1)

[Claims] 1. The sensor float 7A is pivotably supported vertically around the rear fulcrum Q to the seedling planting device B which is connected to the machine A so as to be able to rise and fall freely, and the front fulcrum P of the sensor float 7A is connected to the seedling planting device B. The support member 11 provided in the planting device B so as to be swingable up and down is supported so as to be relatively movable up and down, and the front fulcrum for the support member 11 is set based on the up and down swinging displacement of the sensor float 7A due to ground pressure fluctuations. The seedling planting device B is controlled to rise and fall so that the vertical position of P is within a set range, and the rear fulcrum Q is raised and lowered to change the relative height of the sensor float 7A to the seedling planting device B. A paddy field working machine is configured to adjust the planting depth by adjusting the planting depth, and is provided with a linkage mechanism 27 that moves the front fulcrum P up and down in the same direction as the rear fulcrum Q moves up and down in the adjustment of the planting depth, The paddy field work machine is configured such that the linkage mechanism 27 is configured such that the amount of vertical movement of the front fulcrum P is smaller than the amount of vertical movement of the rear fulcrum Q.