JPH01269415A - Paddy field working machine - Google Patents

Abstract

PURPOSE:To prevent overlap of loci of wheels and operation row by providing means for setting the limit of transversely moving motion of working device on neutral side of position mutually overlapping working position of the working device in the field face and of loci wheels in straight running of running machine body. CONSTITUTION:A control member 23 capable of rocking sideways shaft 22 as a shaft center is provided and a moving amount-controlling means B is constituted so that transversely moving limit of a working device A can be arbitrarily set by coupling an arm body 24 for operating a control member 23 with a nut 27 fitting to a screw shaft 26 subjected to turning operation by a handle 25. In the moving amount controlling means B, a stopper 28 is provided on the screw shaft 26 so that limit of yawing motion of the working device A is set on neutral side of the position mutually overlapping the working position of working device A in the field face and loci of wheels in straight running of running machine body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a paddy field working machine, and more particularly to a paddy field working machine having a working device connected to the rear end position of a traveling machine so as to be able to move laterally.

[Conventional technology]

In general, the movement of the working device laterally with respect to the traveling machine body is called yawing, and conventionally, paddy field working machines in which the working device is connected to the traveling machine body in such a way that it can perform yawing motion are There is one disclosed in Japanese Patent No. 61-77721.

[Problem to be solved by the invention]

Regarding working devices, the working devices included in paddy field working machines are those configured to transplant paddy rice seedlings into the field, or those configured to sow seeds into the field. There are different types, and these working devices are usually equipped with planting arms or the like at predetermined intervals in the lateral direction so that they can work on multiple rows at the same time.

In addition, the yawing operation of the work equipment is used to maintain the traveling direction of the work equipment in a predetermined direction even if the traveling direction of the travel equipment changes temporarily, such as when the wheels of the travel equipment run onto a clod of soil. It has a buffering function. However, this yawing motion is also performed when the traveling aircraft is steered, so for example, even when the traveling aircraft is steered with a relatively large turning radius during work, this yawing motion appears. In some cases, the work lines overlapped on the trajectory of the wheels on the traveling aircraft.

□If the work line overlaps with the wheel track, it will be necessary to perform work such as planting seedlings or sowing in a field that is concave due to the wheel track, making it difficult to perform the desired work. There is room for improvement as results may not be obtained.

In addition, in the case of a paddy field work machine that is configured to allow the working device to cowl, if the working device rides on a clod of soil even when traveling straight, the working device will perform a yawing motion, resulting in a change in the trajectory of the wheels and the work being carried out. Columns may overlap, and for the same reason as mentioned above, there is room for improvement in this point as well.

An object of the present invention is to obtain, through rational modification, a yawing structure in which the locus of the wheels and the working row do not overlap during work.

(Means for Solving the Problems) A feature of the present invention is that a working device is connected to the rear end position of a traveling machine so that it can move laterally, and the working position of the working device in a field scene and the straight forward movement of the traveling machine are A movement amount adjusting means for setting the limit of the lateral movement of the working device is provided on the neutral side from the position where the locus of the wheels overlaps with the wheel trajectory at the time, and its operation and effect are as follows. be.

[For production]

If the above characteristics are configured as shown in FIGS. 1 and 2, for example, when the traveling body (3) is steered with a relatively large turning radius, the following features are formed in the field as shown in FIG.
The movement amount adjusting means (B) prevents the working device (A) from moving further than the position on the neutral side from the trajectory (R) of the wheels (2).
It is possible to set the movement amount adjustment means (B) even if a lateral movement force acts on the working device (A) when the traveling machine body (3) is moving straight. Due to the limit, the working position (X) of the working device (A) is
) can be maintained on the neutral side from the trajectory (R).

〔Effect of the invention〕

Therefore, by modifying the machine by forming the movement adjusting means with the maximum lateral movement of the work equipment assumed in advance, a yawing structure was obtained in which the trajectory of the wheels and the work line do not overlap during work. .

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Fig. 5, an engine (4) and a transmission case (5) are provided at the front of a traveling body (3) having front and rear wheels (1) and (2), respectively, and a rear fender (6). ) is provided with a driver's seat (7), a steering handle (8) is provided in front of this driver's seat (7), and a traveling aircraft (
3) Link mechanism (L) extending rearward from the center position
A seedling planting type working device (A) is connected to the rear end to constitute a rice transplanter as an example of a paddy field working machine.

As shown in the figure, the working device (A) includes a transmission case (9),
2 chain cases (10), (10), 3 soil leveling floats (11), (11), (11), seedling stand (12) for placing matted seedlings (-), 4 planting arms (13)..., and is configured to form four rows of planted seedlings with respect to the field scene (P) during work, and the link mechanism (L) has a pair of left and right top links (14).
, (14) and a pair of left and right lower links (15),
(15) and the left and right top links (14)
The front end of the and lower link (15) is connected to the fuselage frame (
3a) is supported by a boss member (17) loosely fitted to a support shaft (16) installed on the side, and the rear ends of the left and right top link (14) and lower link (15) are
The working device (A
), that is, a yawing motion.

Further, this link mechanism (L) can be raised and lowered by the operation of the hydraulic cylinder (21), and can also be operated by the movement amount adjusting means (B).
), the amount of yawing movement is regulated.

That is, as shown in FIGS. 1, 2, and 5, on the lower surface of the rear fender (6) there is a U-shaped regulating member (23 ), an arm body (24) for operating this regulating member (23), and a screw shaft (26) rotatably operated by a handle (25).
), the lateral movement limit of the working device (A) can be arbitrarily set by connecting with the nand (27) which is screwed into ), and the movement amount adjusting means (11) is configured. As shown in Fig. 3, the adjustment means (B) adjusts the working position (X) (seedling planting position) of the working device (A) in the field scene (I) and the straight movement of the traveling machine (3). Wheels when running (2)
, (2) A stomper (28) is attached to the helical shaft (26) so as to set the limit of the yawing operation of the working device (A) to the neutral side from the position where the trajectories (R) and (R) of (2) overlap.
) is provided.

In addition, if it is necessary to set the amount of yawing motion to a small value, as shown in Fig. 4, when steering the front axle (1), the trajectory (R) of the wheels (2), (2) , (II') and the working position may overlap.

In addition, in this rice transplanter, as mentioned above, the front end of the link mechanism (I,) is supported at the center of the traveling body (3). ) even if the direction of movement of the link machine tM(L) changes temporarily, the yawing of the relatively long link machine tM(L) makes it difficult to cause problems such as swinging the working device (A) around greatly.

[Another example]

In addition to the above embodiments, the present invention also includes, for example, as shown in FIG.
Lever (3) that sets the sensitivity of the lifting/lowering control of the work equipment (^)
1) and the movement amount adjusting means (B) may be linked. In the case of this configuration, the lever (31) and the coil spring (32) are linked together so that the biasing force of the coil spring (32) that sets the ground load of the ground leveling flow 1-(11) can be adjusted, and the ground leveling float The lift control valve (3) of the lift hydraulic cylinder (21) is based on the change in the ground load of (11).
3) is operated, and this lever (31
) is linked in such a way that the higher the sensitivity is, that is, the more it is operated toward the side corresponding to a softer field, the smaller the amount of yawing becomes.

Furthermore, as shown in FIG. 7, the present invention links a detection arm (34) that automatically adjusts the sensitivity of the elevation control of the working device (A) according to field conditions and a movement amount adjustment means (B). It's okay. In the case of this configuration, the biasing force of the coil spring (32) that sets the ground load of the ground leveling flow (till) can be adjusted by the swinging displacement of the detection arm (34), and the ground leveling flow) (11 A system is formed such that the lift control valve (33) of the lift hydraulic cylinder (21) is operated based on changes in the leveling load of the ground, and the detection arm (34) swings downward in a soft field. The more the yaw angle decreases, the more the yawing amount is reduced.

In addition to the above-mentioned embodiments, the present invention can be applied to, for example, a paddy field working machine exclusively for sowing, or a structure for yawing can be formed so that the link mechanism swings around a single vertical swing axis. Furthermore, various implementations are possible, such as configuring the movement amount adjusting means with a retractable contact member.

Note that although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the paddy field working machine according to the present invention, and FIG. 1 is a plan view of the working device in a state where the working device is moved to the maximum extent, FIG. 2 is a plan view of the state where the movement of the working device is adjusted, and FIG. The figure is a plan view showing the working position when the working device is moved to the maximum extent, Fig. 4 is a plan view showing the working position during steering, and Fig. 5 is an overall side view of the rice transplanter. FIG. 6 is a diagram showing another embodiment of the operating structure of the movement amount adjusting means, and FIG. 7 is a diagram showing another embodiment of the operating structure of the movement amount adjusting means. (2)...wheels, (3)...traveling body, (A)...work device, (B)...movement adjustment means, ( R)...Trajectory, (P)...
...Field scene, (X)...Working position.

Claims (1)

[Claims] A working device (A) is connected to the rear end position of the traveling machine (3) to enable lateral movement, and the working position (X) of the working device (A) in the field scene (P) and the traveling machine (3) are connected to the rear end position of the traveling machine (3). A movement amount adjusting means (B) for setting a limit of lateral movement of the working device (A) is provided on the neutral side from the position where the locus (R) of the wheel (2) overlaps with the trajectory (R) of the working device (A) when traveling straight ahead. Paddy field work machine.