JPH078036A - Walking type paddy field working machine - Google Patents

Abstract

PURPOSE:To keep a side float so as not to come into contact with seedlings which have already been planted in turning the side of levee. CONSTITUTION:In this walking type paddy field working machine, the lower face position (a) of a side float 11 at the upper end position in the vertical moving range of the side float 11 is situated in a position higher than the lower face position (b) of the center float 10 at the upper end position in planting depth control range of the center float 10 and the lower face position (c) of the side float 11 at the lower end position in the vertically moving range of the side float 11 is situated in almost same height position as the lower face position (d) of the center float 10 at the lower end position in planting depth control range of the center float 10.

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 Conventionally, in the above walking type paddy working machine, the rear end of the center float is located in front of the rear end of the side float as shown in, for example, Japanese Patent Laid-Open No. 60-105415. It was placed in the state.

[0003]

In the case of adopting such a structure, it is required that the side float has a function of a so-called float, which is responsible for a part of the load of the body, behind the rear end of the center float. Therefore, 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. The width of the side float is limited in the widthwise expansion due to restrictions between planting ridges, and in order to increase the size, the float must be long in the front-rear direction. When the vehicle was extended to the rear of the aircraft, the turning radius drawn by the rear end of the side float became large when the vehicle operated to turn at a ridge or the like, resulting in an adverse effect of enlarging the headland. Also, the side float itself can swing up and down with respect to the support frame, but there is no mechanism for limiting the swing range in particular, so for example, if the handle is lifted when turning at the ridge, the side float Oscillates to the lower end position, but if you make a turning motion while lifting such an aircraft in a forward leaning posture, this hanging side float may contact the seedlings that have already planted, causing the floating seedling phenomenon. There are also things to do. The object of the present invention is to eliminate the conventional drawbacks by changing the shapes of the side float and the center float, and at the same time enhance the ground leveling function for the wheel marks, and also to improve the existing features even when turning at the ridge. The point is to provide something that can suppress the impact on planting seedlings.

[0004]

According to a characteristic structure 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 the side float is attached. The side float is configured to be movable up and down with respect to the support frame based on a change in ground pressure, and the side float lower surface position when the side float is at the upper end position of the vertical movement range is planted by the center float. When the side float lower surface position is higher than the center float lower surface position when it is at the upper end position of the depth adjustment range, and the side float is the lower end position of the vertical movement range, the center float is It is located at approximately the same height as the bottom position of the center float when it is at the lower end of the planting depth adjustment range. Yes, the effects thereof are 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 downsized. Moreover, since the side floats can be moved up and down, even if the amount of swelling of the wheel traces is different due to the difference in hardness of the field, or if there is a lump of soil, a uniform leveling action can be given. Furthermore, when the center float is located at the upper end of the planting depth adjustment range of the center float, the lower surface of the side float is located above the lower surface of the center float, so There is no plunge, and it mainly performs the leveling action on the desired wheel mark. When the center float is located at the lower end of the planting depth adjustment range of the center float, the bottom surface of the side float is located at approximately the same height as the bottom surface of the center float, so lift it with the center float as a reference. If so, the side floats can also be lifted to almost the same height position, so that the side floats can be prevented from coming into contact with the planted seedlings.

[0006]

[Effect of the invention] The support load of the side float can be reduced,
Moreover, since the function is only the ground leveling function for the wheel marks, the side float itself can be made smaller than before, and there is less mud pushing, and the rear end of the side float is located at the front side compared to the past. Because you can
The amount of headland formation also decreases. Moreover, since it can be rocked, the leveling action can be performed evenly, and it is possible to maintain a good leveling action with a low rate of mud coverage, with little effect on existing seedlings, and to prevent floating seedlings and seedling collapse phenomena. Can be suppressed.

[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 will be described. As shown in FIGS. 2 and 3, the handle support frame 12 extends rearward from the tubular frame 7, and the first bracket 13 swings back and forth on the handle support frame 12 via the lateral axis X. The shaft is freely supported, and the front-and-back axial center Y is attached to the first bracket 13.
The second bracket 14 is pivotally supported around the left and right, and the rear end portion of the center float 10 is attached to the second bracket 14 so that the center float 10 swings up and down around the lateral axis X and moves back and forth. The rolling operation is configured around the axis Y of the direction. This center float 10
The rear end of the handle 9 extends near the bottom of the handle 9. The center float 10 functions as a sensor float, and ascends and descends to vertically move the propulsion wheels 4 and 4 by vertically swinging about the lateral axis X, and rolls around the longitudinal axis Y to the left and right. Propulsion wheels 4,
The rolling control for swinging 4 in the reverse direction is performed.

A planting depth adjusting mechanism of the center float 10 will be described. As shown in FIGS. 3 and 4, the planting depth adjusting lever 21 is attached to the handle support frame 12 via the lateral shaft 20 and the lateral axis X described above is attached to the lever portion of the planting depth adjusting lever 21. The first bracket 13 is attached via. A guide plate 24 for guiding the planting depth adjusting lever 21 is provided near the grip portion of the planting depth adjusting lever 21, and the guide plate 24 is attached to the handle support frame 12. Information board 2
4, a sawtooth-shaped engaging portion 24a for locking the adjusting position of the planting depth adjusting lever 21 is formed, and the planting depth adjusting lever 21 is swung to change the engaging position to the engaging portion 24a. By doing this, the planting depth can be changed. Planting depth adjustment lever 2
When 1 is swung, the first bracket 13 and the second bracket 14 are interlocked with each other to change the height of the center float 10 with respect to the body and adjust the planting depth.

The mounting structure of the side floats 11, 11 will be described. As shown in FIGS. 3 and 4, a bracket 15 is attached to an intermediate position of the handle support frame 12, and a portal frame 16 as a support frame for supporting the side float is pivotally supported at the axial center P position on the bracket 15. I am doing it. Side floats 11 are attached to the left and right ends of the gate frame 16. The mounting of the side float 11 will be described in more detail. The support brackets 16A are mounted on the left and right ends of the gate frame 16 and the receiving brackets 11A are mounted on the upper surface of the side float 11.
Link with the upper link 17 and the lower link 18,
The parallel quadruple link mechanism 19 is configured to include the side float 11
It is possible to move up and down in parallel. The support bracket 16A is formed in an angle type. The upper link 17 is pivotally supported on the side surface of the angle type frame, and the swing range of the upper link 17 is brought into contact with the upper link 17 on the ceiling surface of the angle type frame. In order to regulate the above, the ceiling surface is projected in parallel. That is, when the side float 11 rises due to an increase in the ground contact pressure, the upper link 17 comes into contact with the rear end of the ceiling surface when the amount of rise reaches a certain level, and the rise is stopped. The lower surface of the side float 11 in this state is at the height a, as shown in FIG. When the ground pressure decreases from that state and the upper link 17 swings downward and reaches a certain amount, the upper link 17 contacts the front end of the ceiling surface and does not swing further. The lower surface of the side float 11 in this state is at the height c, as shown in FIG. For such a vertical movement range of the side float 11, the center float 1
The correspondence with the vertical movement range by adjusting the planting depth of 0 is as shown in the figure. That is, the lower surface position a of the side float 11 is the center float 10 at the upper end position of the planting depth adjustment range of the center float 10.
At a position higher than the lower surface position b. Side float 1
The lower surface position c of 1 is higher than the lower surface position d of the center float 10 at the lower end position of the planting depth adjusting range of the center float 10. In this case, the height c of the lower surface of the side float 11 may be lowered to substantially the same height as the lower end position d to expand the vertical movement range.

A locking bracket 22 is provided on the gate frame 16 and the locking bracket 22 and the upper link 1 are provided.
7, a tension spring 23 for biasing is provided, the side float 11 is biased downward, and the locking position of the tension spring 23 with respect to the locking bracket 22 is changed so that the biasing force can be changed. Configured. The bottom surface of the side float 11 is provided with an elevation angle of about 2 to 5 °, which is an upward slope, and is configured to easily swing in the upward direction.
Since the side float 11 has a good leveling effect on the soil mass and the like, the soil mass is less exposed from the water surface and the weeding effect is high.

[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. To call. Although the side float 11 has a form in which the gate frame 16 swings back and forth, the left and right side floats 11 may be independently raised and lowered with respect to the handle support frame 12.

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

[Brief description of drawings]

[Figure 1] Side view of 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 plan view showing an arrangement state of a center float and a side float.

FIG. 4 is a side view showing a mounted state of a side float.

FIG. 5 is an operation diagram showing a height state of a center float and a side float.

[Explanation of symbols]

 4 Propulsion Wheel 10 Center Float 11 Side Float 16 Support Frame a, b, c, d Bottom Position

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Nagata 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Sakai Factory

Claims (1)

[Claims] 1. A center float (1 with adjustable planting)
0) Walk-type paddy fields in which propulsion wheels (4) are arranged on both sides, and side floats (11) for wheel land leveling are arranged behind the left and right propulsion wheels (4) respectively. In the working machine, the rear end of the center float (10) and the rear end of the side float (11) are arranged such that they are located at substantially the same front and rear positions, and the side float (11)
The side float (11) is configured to be movable up and down based on the change of the ground pressure with respect to the support frame (16) to which the side float (11) is located at the upper end position of the vertical movement range. The float lower surface position (a) is higher than the center float lower surface position (b) when the center float (10) is at the upper end position of the planting depth adjustment range, and the side float (11). ) Is located at the lower end position of the vertical movement range, the side float lower surface position (c) is the center float lower surface position (d) when the center float (10) is at the lower end position of the planting depth adjustment range. A walkable paddy work machine located at approximately the same height.