JPS6287014A - Rice field working machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 by a support member provided in the seedling planting device so as to be able to swing up and down relative to each other. The seedling planting device is configured to be controlled up and down so that the vertical position of the front fulcrum with respect to the support member is within a set range based on the rocking displacement, and side floats are provided on both sides of the sensor float. is pivoted around the rear fulcrum so that it can swing up and down,
The rear fulcrum of the sensor float and the rear fulcrum of the side float are interlocked and connected to the lateral support shaft on the side of the seedling planting device and rotated around the axis of the lateral support shaft. Both floats are raised and lowered integrally by providing a linkage mechanism that simultaneously lifts and lowers the fulcrum and lifts and lowers the front fulcrum of the sensor float in the same direction while its vertical position relative to the support member is within a set range. This invention relates to a paddy field work machine configured to be adjustable in depth.

[Conventional technology]

In this type of paddy field work machine, conventionally, when setting the rear fulcrum of the side float and the rear fulcrum of the sensor float,
Both were connected to the horizontal support shaft provided on the seedling planting device at approximately the same position in the longitudinal direction of the aircraft, or with the rear support of the sensor float located forward (for example, the Japanese Patent Publication Publication No. 56-29
Publication No. 963).

[Problem that the invention seeks to solve]

However, as shown in Figure 5 (see Figure 1), a sensor float (7A
), since the rear fulcrum (Q) is located relatively forward, the front end of the sensor float (7A) should be extended to the front end of the planting case (10) to increase the ground contact area. However, in order to do so, with the seedling planting device (B) in the raised position relative to the aircraft, connect the transmission shaft (6) extending from the device (A) to the planting case (10). In order to avoid interference, it was necessary to form a notch (a) at the front end of the sensor float (7A) that retracts in the longitudinal direction of the sensor float (7A).

Therefore, mud flows into the sensor float from this notch and adheres to it, increasing the weight of the float, changing the sensitivity of the sensor, and causing problems such as an increase in the amount of sinking into the rice field, causing mud to be pushed out. .

The purpose of the present invention is to provide a rational arrangement for the rear fulcrums of the sensor float and side float.
It is an object of the present invention to provide a sensor float that can secure a stable grounding posture and also secure a float posture that suppresses the influence on seedling planting work even when adjusting the planting depth.

[Means for solving problems]

The characteristic configuration according to the present invention is such that the rear fulcrum of the sensor float is located rearward than the rear fulcrum of the side float, and the linkage mechanism is arranged so that the amount of vertical movement of the front fulcrum is smaller than the amount of vertical movement of the rear fulcrum. The functions and effects are as follows.

[For production]

In other words, by positioning the rear fulcrum of the sensor float to the rear of the rear fulcrum of the side float, the rear fulcrum of the sensor float can be positioned further to the rear of the fuselage than conventional models, resulting in a reduction in the ground contact area of the sensor float. There is no need to provide a conventional notch at the front end of the sensor float.

〔Effect of the invention〕

As a result, there is no mud flow from the notch, and it is possible to suppress changes in sensor sensitivity and effects on planted seedlings such as mud pushing, and the front end is positioned as far back as possible to avoid interference with the transmission shaft. However, since the rear fulcrum can be positioned further rearward, the overall length of the sensor float can be substantially increased, and a stable grounding state can be obtained by increasing the grounding area.

Furthermore, when adjusting the planting depth, the vertical movement amount of the rear fulcrum of the sensor float is set to be larger than the vertical movement amount of the front fulcrum, so the attitude of the sensor float is spaced downward from the seedling planting device. When planting shallowly, the posture is tilted forward and upward compared to before adjustment, which dulls the sensor sensitivity and stabilizes the planting condition.
It is designed to suppress floating seedlings and fallen seedlings even in soft fields, and when planting deeply close to the seedling planting device, the position is tilted forward and downward compared to the previous position, making the sensor sensitivity more sensitive, even in hard fields. In addition to suppressing the mud-pushing phenomenon caused by the float, the planting position is deep, so there is little effect on the planting position of the seedlings.

Moreover, the rear fulcrum of the sensor float and the rear fulcrum of the side float are connected to the lateral support shaft on the side of the seedling planting device so as to be able to integrally operate around this lateral support shaft. -As disclosed in Publication No. 102714, at least the rear fulcrum is moved up and down relative to the front fulcrum, such as in a case where the rear fulcrum and the front fulcrum are configured to operate by the same amount in adjusting the planting depth. In order to position only the rear fulcrum of the sensor float to the rear of the side float, the rear fulcrum of the sensor float can be changed by simply lengthening the arm that connects the rear fulcrum of the sensor float to the horizontal support shaft on the side of the seedling planting device. The amount of vertical movement of the front fulcrum can be larger than the amount of vertical movement of the front fulcrum, and changes required for modification can be kept to the minimum required by simply lengthening the arm, and only one horizontal support shaft is required for adjusting the planting depth. , the structure is simpler and the operation is easier than the one that has a horizontal support shaft for the side float and a horizontal support shaft for the sensor float.

〔Example〕

As shown in Figure 4, a seedling stand ( 4) Planting mechanism (5)
, a planting case (10) transmission-connected to the transmission shaft (6) from the machine (A), and a float group (7) comprising a sensor float (7A) and two side floats (7B).
A seedling planting device (B) consisting of 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) pivotably supported on the front end of the planting case (10) are connected to the bending link (12).
), and a spring (13) is attached that biases the bending link (12) in a direction to extend it. The bending link (I2) 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),
The vertical swing movement of the bending link (12) is controlled by a control valve (14).
) It is designed to transmit power. In other words, the sensor float (
When the bending link (12) expands due to a downward movement centering on the rear fulcrum (Q), which will be described later, due to a decrease in the ground pressure of 7A), the inner wire (17a) of the wire mechanism (17) is pulled, and the control valve (14) is pulled. Operate the spool (14a) in the direction of the arrow, operate the hydraulic cylinder (8) to lower the seedling planting device (B), and adjust the distance (1) between the support member (11) and the front fulcrum (P). The seedling planting device (B) descends in order to maintain a constant level. On the other hand, when the ground pressure increases and the sensor float (7A) lifts up, the seedling planting device (B) is raised while keeping the distance (β) constant. B) is configured to be able to be controlled up and down so as to maintain a constant posture with respect to the circular surface.

As shown in Figures 1 and 2, a horizontal support shaft (18) extending along the width direction of the aircraft body is supported below the planting case (10) so as to be rotatable around its own axis. Horizontal support shaft (1
A plurality of short arms (19A) fixed to 8) are connected to rear supports (R) of two side floats (7B) so as to be able to swing relative to each other. On the other hand, connect the long arm (19B) fixed to the horizontal support shaft (18) to the rear support of the sensor float (
Q) is connected to allow relative swinging. The horizontal support shaft (18
) is fixed with an artificial adjustment lever (20), and by rotating the horizontal support shaft (18) around its own axis with this adjustment lever (20), the sensor float (7A)
and the rear fulcrum (Q) of the side float (7B) and the rear fulcrum (
The planting depth of the seedling planting device (B) can be adjusted by simultaneously swinging the seedling planting device (R) up and down.

A first connecting arm (21) is erected on the horizontal support shaft (18), and a second connecting arm (22) is attached to the planting case (10) so as to be rotatable together with the support member (11).
) is erected on a support shaft (23) pivotally supported at the front end, and both connecting arms (21) and (22) are connected by a connecting rod (24), so that the front and rear support points (P), (fll
) in the same direction.

The linkage mechanism (25) has a first linkage arm (21) and a second linkage arm (21).
By setting the connecting arms (22) to the same length and the long arm (19B) to be longer than the support member (11), the rear fulcrum of the sensor float (7A) is adjusted to adjust the planting depth. (b) vertical movement of the front fulcrum (P)
) is set to be larger than the amount of vertical movement.

Embodiment C] 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 linkage between the seedling planting device and the pulp for controlling the elevation 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 arrangement state, FIG. 3 is a side view showing the swinging posture of the sensor float, FIG. 4 is an overall side view, and FIG.
The figure is a plan view showing a state in which a conventional sensor float and a side float are connected at a rear fulcrum. (A)...This machine, (B)...Seedling planting device, (P)...Front fulcrum, (B)...Rear fulcrum, (R)... Rear fulcrum, (78)...
...Sensor float, (7B)...Side float, (11)...Support member, (18)...
...Horizontal support shaft, (25) ...Linkage mechanism.

Claims (1)

[Claims] A seedling planting device (
The sensor float (7A) is pivoted vertically about the rear fulcrum (Q) to B), and the front fulcrum (P) of the sensor float (7A) is vertically supported to the seedling planting device (B). The sensor float (7A) is supported by a swingably provided support member (11) so as to be relatively vertically movable, and the sensor float (7A) has the above-described vertical movement based on the vertical movement caused by ground pressure fluctuations around the rear fulcrum (Q) of the sensor float (7A). Front fulcrum (P) for support member (11)
Seedling planting device (B) so that the vertical position of
side floats (7A) provided on both sides of the sensor float (7A).
7B) is pivoted around the rear fulcrum (R) so that it can freely swing up and down,
The rear fulcrum (Q) of the sensor float (7A) and the rear fulcrum (R) of the side float (7B) are interlocked and connected to the lateral support shaft (18) on the side of the seedling planting device (B) to By rotating the support shaft (18) around the axis, the rear support point (Q) and the rear support point (R) are raised and lowered simultaneously, and the front support point (P) of the sensor float (7A) is moved to the support position. By providing a linkage mechanism (25) that lifts and lowers in the same direction when the vertical position with the member (11) is within the set range, both floats (7A) and (7B) can be raised and lowered to adjust the planting depth in an integrated manner. The rice paddy work machine is configured such that the rear fulcrum (Q) of the sensor float (7A) is located rearward than the rear fulcrum (R) of the side float (7B), and the rear fulcrum (Q) of the sensor float (7A) is The linkage mechanism (2
5) A paddy field working machine comprising: