JP3138363B2 - Walking paddy working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

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

[0003]

According to the above-described conventional structure, when the rear end of the center float is disposed in front of the rear end of the side float, the center float is disposed behind the center float. Behind the end, the side float is required to exhibit a so-called float function of taking part of the body load, so that the float needs to be large. Therefore, a large side float was provided, but because of the large float, there is a strong tendency to thrust. And, as the side float, the width in the width direction is limited due to the restriction of the spacing between the planting strips, and in order to increase the size, it must be a long float before and after, and if so, the rear end of the side float Swells to the rear of the fuselage, causing the rear end of the side float to draw a large turning radius when turning around a ridge, etc. .

Further, in the above-mentioned conventional structure, since the frame to which the side float is attached is supported so as to be able to perform rolling operation with respect to the body, even if the body is inclined right and left due to the difference in the depth of the left and right cultivators, the left and right sides are left and right. The side floats can follow the ground horizontally in the left and right directions, which is useful in that respect.However, the mounting frame is pivotally supported at a fixed height with respect to the aircraft, and the relative height with respect to the aircraft does not change. The amount of subsidence, in other words, the action height of the side float also changes according to the height of the aircraft with respect to the field scene,
The side float sinks into the mud, causing problems such as a decrease in the function as a float and an increase in mud pushing.

[0005] Further, since the mounting frame is pivotally supported at a fixed height position with respect to the body, for example, when one of the side floats climbs over a bulge in a field scene, the mounting frame rolls. Then, the other side float sinks into the field scene, or, if the field scene is hard enough not to sink the other side float too much, the fulcrum itself of the mounting frame will be pushed up,
There was also a risk that the rear part of the fuselage was raised and the planting depth became shallow.

The present invention has been made in view of such a point, and by improving the arrangement of the side float and the center float and the supporting structure thereof,
An object of the present invention is to solve the above-mentioned conventional problems.

[0007]

A feature of the present invention is that a propulsion wheel is disposed on each side of a center float, and a rear side of each of the right and left propulsion wheels is provided.
A walking paddy working machine having a wheel float leveling side float disposed thereon, wherein the rear end of the center float and the rear end of the side float are arranged in a state of being located at substantially the same front-back position, The two side floats are connected and supported at both ends of a mounting frame, and the entire mounting frame is supported on the body such that the entire mounting frame can move up and down with respect to the body and can perform a rolling operation based on a change in the ground pressure of the side floats. The operation and effects are as follows.

[0008]

According to the above construction, by setting the rear end of the center float at substantially the same front and rear position as the rear end of the side float, the body weight is supported by the rear end of the center float and the side float. In comparison, the burden of supporting the side float can be reduced. Therefore, the side float can be made compact, and the side float performs only the ground leveling function for the wheel traces in the normal working posture, and supports a part of the body weight when the body is inclined by rolling or the like.

In addition, even if the body is inclined left and right due to the difference in the sinking depth of the left and right wheels, the entire mounting frame can be rolled and moved up and down with respect to the body due to the difference in the ground pressure received by the side floats. The side floats are located at a level where a constant contact pressure is applied to maintain a leveling effect on wheel marks.

Further, even if one of the side floats climbs on a cliff or the like rising in the field scene, the mounting frame itself is displaced upward with respect to the body, so that the mounting frame is raised by pushing up one of the side floats. Rolling around the fulcrum prevents the other side float from being largely pushed in, or pushing up one side float to push up the rear of the fuselage with the mounting frame.

[0011]

According to the present invention, the side float itself can be reduced in size as compared with the conventional one, so that there is less mud push, and the rear end of the side float is located on the front side compared to the conventional one by the shortened overall length. So you can
The amount of headland formation is also reduced. In addition, the side float, which mainly has a leveling function by downsizing, and the lifting and lowering function of the entire mounting frame and the rolling function, always stably maintain both side floats in a predetermined posture with respect to the field scene regardless of the horizontal inclination of the aircraft. It can be grounded, and the leveling function for wheel marks can be improved. In addition, since the entire mounting frame has an elevating function, local bulges such as earthmass are absorbed by the rising of the entire mounting frame, and one side float is unduly settled, and shallow planting by lifting the rear part of the aircraft There is also an advantage that generation can be suppressed.

[0012]

Embodiments will be described below with reference to the drawings. FIG.
As shown in the figure, the wheel transmission cases 3 and 3 are provided on both left and right sides of the transmission case 1 serving also as a frame so as to be swingable around a horizontal axis.
And the left and right propulsion wheels 4 and 4 are supported on the swinging end sides of the respective wheel transmission cases 3 and 3 to support the fuselage, and on a frame 5 extending forward from the transmission case 1. With engine 6 and mission case 1
A planting case 2, a seedling planting device 8, and a steering handle 9 are provided at a rear portion of a cylindrical frame 7 extending rearward from the rear side, and a center float 10 and wheels 4, 4 are provided below the fuselage. The side floats 11 and 11 are arranged rearward to constitute a walking 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 extends rearward from the cylindrical frame 7, and the handle support frame 12
The first bracket 13 is pivotally supported via the horizontal axis X so as to be able to swing back and forth, and the second bracket 14 is pivotally supported with respect to the first bracket 13 around the axis Y which is forward and backward so as to be able to swing left and right. The rear end of the center float 10 is attached to the second bracket 14, and the center float 10 is configured to swing up and down around the horizontal axis X and to freely roll around the front and rear axis Y. The rear end of the center float 10 extends to near the bottom of the handle 9.

The center float 10 functions as a sensor float. The center float 10 moves up and down around the horizontal axis X to raise and lower the propulsion wheels 4 and 4, and rolls around the front and rear axis Y. Rolling control for causing the left and right propulsion wheels 4 and 4 to swing back and forth by the operation is performed.

The mounting structure of the side floats 11, 11 will be described. As shown in FIGS. 3 and 4, the side floats 11 are connected to and supported by a handle support frame 12 via a mounting frame 16. This connection support structure will be described in detail. As shown in FIG. 4, the vertical frames 12A, 12A constituting the handle support frame 12 are arranged in parallel to the left and right, and the vertical frames 12A, 12
A is connected by a horizontal connecting frame 12B facing left and right, a headed pin 15 is fixed to the horizontal connecting frame 12B, and the pin end of the headed pin 15 extends forward.

On the other hand, the mounting frame 16 is formed as a portal 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. The plate bracket 16A has a vertically long hole 16a. Next, the mounting frame 16 can be mounted on the handle support frame 12 by engaging the elongated holes 16a of the plate bracket 16A with the headed pins 15. Since the engagement hole of the plate bracket 16A is a long hole 16a, in this engaged state, the mounting frame 16 can roll and swing around the axis of the headed pin 15, and furthermore, has a long length. The mounting frame 16 can be moved up and down by the amount of the hole 16a. With such a configuration, the side floats 11, 11 together with the mounting frame 16 can be simultaneously moved up and down while rolling.

At the left and right ends of the mounting frame 16, respectively,
The locking brackets 16B, 16B are erected, and the locking pins 12b, 12b are provided on the horizontal connecting frame 12B.
Return springs 17, 17 are provided over the locking bracket 16B and the locking pin 12b, respectively, and have the function of urging the side floats 11, 11 that perform the rolling operation to the neutral position. A locking pin 18 is erected on the upper end of the plate bracket 16A, and a return spring 19 is laid over the headed pin 15 provided at an intermediate position of the horizontal connecting frame 12B and the locking pin 18 to form a mounting frame. 16 and the side floats 11, 11 are biased to the ground. 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 running state of the aircraft can be stabilized while the mounting frame 16 freely swings. Straightness is improved. In addition, due to the improvement of the leveling performance of the side floats 11, 11, even in shallow water management, the exposure of the soil mass from the water surface is small, and the weeding effect is high.

Side float 11 and center float 10
Will be described. As shown in FIG. 2, the center float 10 is positioned 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-rear position.
The rear end extends to the rear. As a result, as described in the section of operation, the side float 11 can be made compact, and it is not necessary to have a long front-to-rear long dog-like contact area as in the related art.

[Other Embodiments] In the drawings, the one with a fertilizer is shown, but the one without a fertilizer and the one used as a sowing machine may be used. Name.
Although the side float 11 is configured to swing back and forth, the left and right side floats 11 may be independently lifted and lowered with respect to the handle support frame 12.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view showing a walking 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 an attached 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 wheel 10 Center float 11 Side float 16 Mounting frame

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masayuki Harada 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References JP-A-1-132309 (JP, A) 139620 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A01C 11/02 334 A01C 11/02 312 A01C 11/02 342

Claims (1)

(57) [Claims] 1. On both sides of a center float (10),
A walking type paddy field working machine having a propulsion wheel (4) disposed therein and a side float (11) for grading wheel traces disposed 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 at substantially the same front-rear position, and both side floats (1
1) is connected and supported on both ends of the mounting frame (16),
Based on the change of the contact pressure of these side floats (11)
Then, the entire mounting frame (16) is
Elevating and rolling operation supported by the aircraft
A walking paddy working machine.