JPH078035A - Walk-type paddy work machine - Google Patents

Abstract

(57) [Summary] [Purpose] The object is to provide a walk-behind rice transplanter that can improve the leveling of wheel marks and the straightness of the airframe. [Structure] Extend the rear end of the center float 10 to a position where the front and rear positions of the rear ends of the side floats 11 substantially coincide with each other,
The mounting frame 16 that connects and supports the side floats 11 and 11 is configured to be capable of freely rolling operation and lifting operation with respect to the handle support frame 12 on the machine body side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking in which propulsion wheels are arranged on both sides of a center float, and side floats for arranging wheel marks are arranged behind the left and right propulsion wheels. Type paddy work machine.

[0002]

2. Description of the Related Art In the walk type paddy working machine, conventionally, as shown in, for example, Japanese Utility Model Publication No. 49-34503, the rear end of the center float is located in front of the rear end of the side float. Was placed in.
Further, the side floats are connected and supported at both ends of the mounting frame, and the mounting frame is supported so as to be capable of rolling around the longitudinal axis of the machine body.

[0003]

In the case where the rear end of the center float is positioned in front of the rear end of the side float, the rear end of the center float is rearwardly Since it is required that the side floats perform a so-called float function that bears a part of the airframe load, it is necessary to increase the size of the center float. Therefore, a large side float was provided, but due to the large float, there is a strong tendency to push mud. And as the side floats, the width expansion in the width direction is limited due to the restriction of the planting line spacing, and in order to increase the size, it is inevitable that the floats are long in the front and rear. Was to extend to the rear of the aircraft, and when turning on a ridge or the like, the turning radius drawn by the rear end of the side float becomes large, which causes an adverse effect of enlarging the headland. Also, since the frame with the side float attached is configured to be able to perform rolling operation with respect to the machine axis, the side float can follow the ground contact even if the left and right tillers are different, which is useful in that respect, but the field hardness Depending on the difference in the depth of the wheel, the depth of depression of the wheel may differ, but in this case as well, the mounting frame is pivotally supported by the axis of the fuselage, so the relative height to the fuselage does not change, and the depth of depression of the wheel does not change. The height of action of the side float also changes depending on the condition, and the side float sinks into the mud, reducing its function as a float, and it is difficult to position it at the height at which it touches the field. . It is an object of the present invention to provide a device capable of eliminating the conventional drawbacks by changing the shapes of the side float and the center float.

[0004]

According to a characteristic configuration of the present invention, the rear end of the center float and the rear end of the side float are arranged in substantially the same front and rear positions, and both side floats are arranged. It is connected and supported at both ends of the mounting frame, and this mounting frame is configured to be capable of lifting operation and rolling operation based on the change of the ground pressure of the side float with respect to the machine body,
The effect is as follows.

[0005]

In other words, by setting the rear end of the center float to the front and rear position substantially the same as the rear end of the side float,
Since the body weight is supported by the rear end portion of the center float and the side float, the supporting load of the side float can be reduced as compared with the conventional case. Therefore, the side float can be made compact, and in the normal working posture, the side float only performs the ground leveling function with respect to the wheel marks, and when the machine body is tilted due to rolling or the like, it supports a part of the machine body weight. Moreover, even if there is a difference in the sinking height of the wheels due to the difference in the hardness of the field surface, the mounting frame will roll and move up and down with respect to the aircraft due to the difference in the ground contact pressure received by the side floats, so that the side floats will remain constant. It is located at a height (mud surface) that receives ground contact pressure and maintains the leveling action for wheel marks.

[0006]

Since the side float itself can be made smaller than the conventional one, there is less mud pushing, and the rear end of the side float is located at the front side compared to the conventional one because the overall length is shortened due to the miniaturization. Therefore, the amount of headland formation is reduced. Moreover, the side float, which mainly has a ground leveling function due to the miniaturization, can maintain a stable ground contact state with respect to the field by exhibiting the rolling elevating function of the mounting frame, and the ground leveling function for the wheels can be improved. In particular, since it has an elevating function, it has the advantage of being able to handle local swells such as clods.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
As shown in FIG. 3, the wheel transmission cases 3 and 3 are swingably mounted on the left and right sides of the transmission case 1 which also serves as a frame, around the horizontal axis.
And the left and right propulsion wheels 4 and 4 are supported on the rocking end sides of the respective wheel transmission cases 3 and 3 to support the airframe, and on the frame 5 extending from the mission case 1 to the front side. The engine 6 is mounted on the mission case 1
The planting case 2, the seedling planting device 8, and the steering handle 9 are provided at the rear of the cylindrical frame 7 extending rearward from the rear side, and further, the center float 10 and the wheels 4, 4 are provided below the machine body. The side floats 11 and 11 are arranged on the rear side to form a walk-behind rice transplanter.

Next, the mounting structure of the center float 10 will be described. As shown in FIGS. 2 to 4, the handle support frame 12 is extended rearward from the tubular frame 7, and the handle support frame 12 is
The first bracket 13 is swingably supported in the front-back direction via the lateral axis X, and the second bracket 14 is swingably supported in the left-right direction about the front-back direction axis Y with respect to the first bracket 13. The rear end portion of the center float 10 is attached to the second bracket 14 so that the center float 10 can be vertically swung around the lateral axis X and can be rolled around the longitudinal axis Y. The rear end of the center float 10 extends to near the lower part of the handle 9. The center float 10 functions as a sensor float, and ascend / descend control for vertically moving the propulsion wheels 4 and 4 by vertically swinging about the lateral axis X.
Rolling control is performed in which the left and right propulsion wheels 4 and 4 are oscillated back and forth by rolling operation around the front-rear axis Y.

The mounting structure of the side floats 11, 11 will be described. As shown in FIGS. 3 and 4, the side floats 11, 11 are connected to and supported by the handle support frame 12 via the mounting frame 16. This connection support structure will be described in detail. As shown in FIG. 4, the vertical frames 12A, 12A forming the handle support frame 12 are arranged parallel to each other in the left-right direction, and the vertical frames 12A, 12
A is connected by a horizontal connecting frame 12B facing left and right, the headed pin 15 is fixed to the horizontal connecting frame 12B, and the pin tip of the headed pin 15 extends forward. On the other hand, the mounting frame 16 is formed as a gate-shaped frame, the side floats 11 are mounted on both left and right ends of the mounting frame 16, and a plate bracket 16A is erected upward at an intermediate position of the mounting frame 16. A vertically oriented long hole 16a is formed in 16A. Next, the long hole 16a of the plate bracket 16A can be engaged with the headed pin 15 to attach the attachment frame 16 to the handle support frame 12. Since the hole for engaging the plate bracket 16A is the long hole 16a,
In this engaged state, the mounting frame 16 has the headed pin 15
It is possible to roll and swing around the axis of the above, and further, the mounting frame 16 can be moved up and down by the amount corresponding to the interchange of the elongated hole 16a. With such a configuration, the mounting frame 1
6, the side floats 11 and 11 can be simultaneously moved up and down while rolling. Locking brackets 16B, 1 are provided at the left and right ends of the mounting frame 16, respectively.
6B is provided upright, locking pins 12b and 12b are provided on the horizontal connecting frame 12B, and return springs 17 and 17 are installed over the locking bracket 16B and the locking pin 12b, respectively, to perform rolling operation. Side float 11,11
Has a function of urging the to the neutral position. Plate bracket 16
A locking pin 18 is erected on the upper end of A, and a return spring 19 is stretched across the locking pin 18 and a headed pin 15 provided at an intermediate position of the horizontal connecting frame 12B, together with the mounting frame 16. The side floats 11, 11 are grounded. As described above, by providing the return springs 17 and 19, the ground followability of the side floats 11 and 11 can be improved and the mounting frame 16
Although it freely swings, the traveling state of the machine is stable and the straightness is good. Also, the side float 11,
Due to the improvement of the leveling performance of No. 11, even in shallow water management, the exposure of soil mass from the water surface is small and the herbicidal effect is high.

Side float 11 and center float 10
The relationship with is explained. As shown in FIG. 2, the center float 10 is arranged so that the rear end of the side float 11 and the rear end of the center float 10 are located at substantially the same front and rear position.
The rear end extends to the rear. As a result, as described in the section of the operation, the side float 11 can be made compact, and it is not necessary to have a large ground contact area having a long front-rear length as in the conventional case.

[Other Embodiments] In the drawings, a fertilizer applicator is shown, but a fertilizer applicator may be omitted or the fertilizer applicator may be used as a sowing machine, which are collectively referred to as a paddy working machine. To call. Although the side floats 11 have a shape that oscillates in the opposite direction, the left and right side floats 11 may be independently lifted and lowered with respect to the handle support frame 12.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Side view showing a walk-behind rice transplanter

FIG. 2 is a plan view showing an arrangement state of a center float and a side float.

FIG. 3 is a partially cutaway side view showing a mounted state of a side float.

FIG. 4 is a front view showing an arrangement state of a center float and a side float.

[Explanation of symbols]

 4 Propulsion wheels 10 Center float 11 Side float 16 Mounting frame

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Harada 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory

Claims (1)

[Claims] 1. A center float (10) is provided on both sides of the float.
A walk-behind paddy work machine in which propulsion wheels (4) are respectively arranged, and side floats (11) for wheel mark leveling are arranged behind the left and right propulsion wheels (4), respectively. The rear end of the center float (10) and the rear end of the side float (11) are arranged so as to be positioned at substantially the same front and rear positions, and both side floats (1
1) is connected and supported at both ends of the mounting frame (16),
A walking paddy work machine in which the mounting frame (16) is configured to be capable of raising and lowering and rolling based on a change in the ground pressure of the side float (11) with respect to the machine body.