JPS6360962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention connects the seedling planting part to the traveling machine so that it can roll freely, so that even if the traveling machine tilts from side to side due to unevenness of the plowing platform, the seedling planting part remains on the rice field. This invention relates to a rice transplanter designed to maintain a constant planting depth on both sides by maintaining the rice transplanter parallel to the rice transplanter.

As mentioned above, as a means of rolling the seedling planting part with respect to the traveling machine body and maintaining it parallel to the field surface, the seedling planting part is connected to the traveling machine body so that it can roll freely. A means for making the seedling planting part follow the rice field by its own weight, and grounding members that can move vertically are installed side by side on the left and right sides of the seedling planting part, and the rice planting part's rice planting part is controlled by the vertical displacement of these grounding members that follow the rice field surface with respect to the seedling planting part body. A method has been devised in which the seedling planting section is controlled to be forcibly rolled relative to the traveling machine body so as to be parallel to the field surface based on the detection result.

Each of the above two methods has advantages and disadvantages.For example, in the free rolling method, the weight of the seedling planting part is supported by the rice field via grounded floats, etc., so in fields where the rice field is hard overall, the rice field may be somewhat rough. In addition, the convex parts of the rice field are crushed and leveled with the ground float, and as a result, the seedling planting area is maintained parallel to the rice field, but in soft fields, there is a difference in the hardness of the mud on the left and right sides. In some cases, the left and right sides of the seedling planting area may have different settlement amounts and tend to tilt toward the softer side.

On the other hand, in the form of drive rolling control, the seedling planting area is forcibly rolled using a drive mechanism, so even if there is a difference in the hardness of the mud on the left and right sides, the seedling planting area will not tilt due to its own weight. , the rolling operation is performed only when the left and right ground contact members are displaced, which is effective in soft fields.
On the other hand, in hard and rough fields, the grounding member spreads out on the convex part of the rice field and mistakenly detects it as the slope of the seedling planting area.
This has the disadvantage that unnecessary rolling control is performed and stability tends to deteriorate.

The present invention has been made in view of this situation, and by making simple adjustments according to the hardness and softness of the field, the seedling planting area can be maintained parallel to the rice field in a rolling form suitable for the field conditions. The purpose is to stabilize the planting depth on the left and right sides, and its feature is that grounding members that are biased downward and can move up and down are arranged side by side on the left and right. The seedling planting section is connected to the traveling machine body in a rolling manner, and the height of each of the grounding members relative to the seedling planting section machine body becomes approximately constant based on height detection of the ground contacting member relative to the seedling planting section machine body. A control mechanism is provided for automatically rolling the seedling planting section,
A change setting mechanism for the downward biasing force of each of the grounding members, and an operation mechanism for switching the control mechanism between an operating state and a non-operating state in which free rolling of the seedling planting section is enabled, are configured to adjust the downward biasing force of each of the grounding members. When the change setting mechanism acts so that the change setting mechanism becomes equal to or more than the set value, the operating mechanism acts so that the control mechanism becomes the non-operating state, and the biasing force of each of the grounding members becomes smaller than the set value. The present invention is characterized in that a mechanism is provided which is linked to the operation mechanism so that when the change setting mechanism operates, the control mechanism enters the operation state.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a link mechanism 3 that can be driven up and down by a fluid pressure cylinder 2 is attached to the rear of a wheeled traveling body equipped with a spare seedling stand 1 at the front.
5 seedling planting devices 4 arranged in parallel on the left and right.
...and three float type grounding members 5a, 5
The seedling planting section 6 having the links a and 5b is connected to the link mechanism 3.
It is configured to transmit rotary power from the traveling machine body to the seedling planting section 6, so that by operating the cylinder 2, the seedling planting section 6 can be raised and lowered with respect to the traveling machine body. 5.
This is a riding rice transplanter that enables row planting.

As shown in FIGS. 2 and 3, each of the grounding members 5a and 5b is attached to the seedling planting unit body 6a so as to be vertically swingable around a horizontal axis 7 on the rear end side, and on the front end side. Applied spring 8a or 8b
a swinging valve operating member 9 which is not biased by the cylinder 2 and is interlocked with the spool of the control valve V of the cylinder 2 by a fork F and a rotating shaft S.
is urged by the spring 10 toward the rising side of the link mechanism 3, and the valve operating member 9 and the center one 5 of the grounding members 5a, 5a, 5b are
A bending/extending link mechanism 11 whose front end side of b is connected to the seedling planting unit body 6a is interlocked with the operating wire 12, and the center grounding member 5b is connected to the seedling planting unit body 6a based on height detection with respect to the seedling planting unit body 6a. The seedling planting section 6 is automatically controlled to move up and down so that the height of the center grounding member 5b relative to the seedling planting section body 6a is within a set range. In other words, even if the surface height of the traveling machine relative to the mud changes due to the unevenness of the tiller, the planting depth in the traveling direction of the traveling machine body can be maintained substantially constant during the work.

As shown in FIGS. 1 to 3, the rake 13 attached to each of the grounding members 5a, 5b is used to push down or cut down the mud that rises on the mud surface, and to remove the raised mud from the grounding members 5a, 5b. This is to prevent the height relative to the aircraft from changing unevenly. In addition, this rake 13 has its base end connected to the grounding member 5.
It is installed in a state where it is inserted into the recessed groove formed on the back side of parts a and 5b, and the positional shift due to the contact resistance with the raised mud is caused by the contact between the base end side and the side wall for forming the recessed groove. It is designed to be blocked. Further, an operating lever 14 shown in FIG. 3 is used to manually operate the control valve V.

Moreover, as shown in FIG. 2, the seedling planting unit body 6
A is attached to the free end member 3a of the link mechanism 3 so as to be rotatable around an axis _P1 in the longitudinal direction of the machine body, so that the seedling planting section 6 can be rolled with respect to the traveling machine body. A reversibly rotatable electric motor M is attached to the free end side member 3a, and a pair of left and right locking members 1 are fixed on the free end side to the seedling planting unit body 6a.
The rolling operation arm 16 engaged between 5 and 15 is thereby aligned with the vertical axis of the motor M.
A pair of left and right switches 17, 17 are connected to each other so as to be oscillated around _P2 , and further correspond to the ones 5a, 5a located on the left and right lateral outer sides of the grounding members 5a, 5b, respectively. , as the side grounding member 5a moves up and down with respect to the seedling planting unit body 6a, the detected part 18 approaches and moves away.
The control circuit 19 is attached to the seedling planting unit body 6a in a state where the switch is cut off, and automatically operates the motor M so that both the switches 17, 17 are in the cut state based on information from the switches 17, 17. Both the switches 17, 17 and the motor M are linked,
Based on the height detection of the left and right side grounding members 5a, 5a relative to the seedling planting unit body 6a, seedlings are planted so that the heights of both grounding members 5a, 5a relative to the seedling planting unit body 6a are approximately constant. A control mechanism 20 for automatically rolling the section 6 is configured. an operating lever 22 that is interlocked and connected by an operating wire 21 to the springs 8a and 8b that respectively bias the grounding members 5a and 5b downward;
is swingably provided in the operating section of the traveling machine body, and the grip section side portion of the lever 22 is engaged with the notch of the lever guide 23, so that the lever 22
The lever 22 is configured to be fixed against the biasing force of the springs 8a and 8b, so that the lever 22
This allows the downward biasing force of each of the grounding members 5a and 5b to be artificially changed to be stronger or weaker in the same direction. An electromagnetic clutch 24 is connected to the operating arm 16 for switching the operating arm 16 between an active state driven by the motor M and a non-active state in which it swings freely.
and the motor M, and by engaging and disengaging the clutch 24, the control mechanism 20 can be switched between an operating state and a non-operating state in which free rolling of the seedling planting section 6 is possible. . The operating switch 25 of the electromagnetic clutch 24 is fixed to the lever guide 23, and when the lever 22 is operated to the operating position where the downward urging force of each of the grounding members 5a, 5a is strongest, the lever 22 When the switch 25 is operated to the clutch disengagement state by the pressing action of , and the lever 22 is operated such that the biasing force of each grounding member 5a, 5a is weaker than the strongest operating position, the pressing force by the lever 22 is released. is configured so that the switch 25 returns to the clutch engagement state by its self-restoring force when the clutch is engaged,
When the biasing force of each grounding member 5a, 5a is operated to the strongest, the clutch 24 is operated in conjunction with the disengaged state, and when the grounding members 5a, 5a are operated to a weaker side than the strongest, the clutch 24 is engaged. It is designed to be operated in conjunction with the state.

In short, when the mud is hard, if the lever 22 is operated to the position with the strongest biasing force, the planting section 6 will be in a state where it can freely roll relative to the traveling body, and the downward biasing force of the grounding member 5a will be If the mud becomes strong, or if the mud is weak, lever 2
2 to the weaker side than the strongest position, the planting part 6 will be controlled by drive rolling, and the downward biasing force of the grounding member 5a will become weaker, so in either case, Regardless of the horizontal inclination of the traveling machine, it is possible to work while maintaining the planting depth on the left and right sides almost constant.

In linking the switching of the electromagnetic clutch 24 and the change setting of the downward biasing force of the grounding member,
As in another embodiment shown in FIG. 7, a mud hardness detection sensor 26, the switch 25, and the springs 8a, 8a are connected so that when the hardness detected by the sensor 26 exceeds a set value, the switch 25 is activated. When the biasing force of each spring 8a becomes equal to or higher than the set value in the disconnecting state and the detected hardness becomes smaller than the set value, the switch 25 is in the clutch engagement state and the biasing force of each spring 8a becomes less than the set value. It may be linked to the mud hardness detection sensor 26 so that the hardness of the mud becomes small. In this case, each changeover is automatically performed based on the mud hardness detection result, which is convenient because the work can be performed more efficiently.

As shown in FIG. 4, each of the seedling planting devices 4 includes a planting arm 2 that is driven to rotate up and down.
A seedling planting claw 28 made of sheet metal bent and formed into a U-shaped cross section is fixed on the free end side of the 7, and a seedling pusher 29 is used to plant the seedlings as the planting arm 27 rotates. It is attached so as to be driven to reciprocate and slide along the inner surface of the claw 28. As shown in FIG. 5, the cutting blade 28a of the seedling planting claw 28 is formed by bending the cutting edge forming part in advance so as to face laterally outward, and the tip side of this bent part is placed at the finishing position. It is formed by cutting to A.

The specific configuration for switching the control mechanism 20 between the operating state and the non-operating state can be varied in various ways, and the clutch 24 will be referred to as a switching operation mechanism 24.

The specific structure for changing and setting the downward biasing force of the grounding member can be changed in various ways, and the lever 22,
Alternatively, the sensor 26 will be referred to as the change setting mechanism 22, 26, and the switch 25 will be referred to as the linking device 25.

As explained above, according to the present invention, the lower the downward biasing force of the grounding member 5a is made weaker in the field where the mud is softer, thereby reducing the sinking of the grounding member 5a to the field surface, improving the ground followability, and seedlings. Appropriate rolling control can be performed by reliably detecting a slight inclination of the planting section 6 with respect to the rice field surface.In addition, the harder the muddy soil is in the field, the stronger the downward biasing force of the grounding member 5a is, thereby preventing convex parts of the rice field surface. In addition, in hard fields where the downward biasing force of the grounding member 5a exceeds the set value, by adopting a free rolling mode, unnecessary driving rolling operation is avoided. Rather, the seedling planting section 6 can be stably maintained parallel to the rice field surface, and as a result, even in fields with any muddy soil hardness, the seedling planting section 6 can be maintained parallel to the rice field surface with an appropriate rolling form. It is now possible to stabilize the planting depth on both sides.

Moreover, switching between the free rolling mode and the drive rolling control mode is performed in conjunction with the adjustment of the grounding member biasing force, so the free rolling mode is in an adjusted state where the grounding biasing force is weak, and the adjusted state is in which the grounding biasing force is stronger than the set value. There is also an advantage that the appearance of the drive rolling control mode as it is can be avoided, and the seedling planting section can always be rolled in an appropriate mode.

Incidentally, 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 drawings]

The drawings show an embodiment of the rice transplanter according to the present invention; FIG. 1 is a side view of the riding rice transplanter, FIG. 2 is a side view of the attachment structure of the seedling planting part, FIG. 3 is a schematic diagram of the control system, and FIG. 4
The figure is a side view of the seedling planting claw attachment part, FIG. 5 is a cross-sectional view taken along the - arrow in FIG.
FIG. 7 is a side view showing another implementation structure of the urging force change setting mechanism. 5a...Grounding member, 6...Seedling planting part, 20...
Control mechanism, 22, 26... Change setting mechanism, 24...
...Switching operation mechanism, 25...Linkage mechanism.

Claims (1)

[Claims] 1. A seedling planting section 6 in which grounding members 5a that are biased downward and are movable up and down are arranged side by side on the left and right is connected to a traveling machine body in a rollable manner, and the height of the grounding members 5a with respect to the seedling planting section machine body 6a is detected. A control mechanism 20 is provided that automatically rolls the seedling planting section 6 so that the height of each of the grounding members 5a relative to the seedling planting section body 6a is approximately constant, and lowering of each of the grounding members 5a is provided. Change setting mechanism 22 for biasing force
or 26 and the operating mechanism 24 that switches the control mechanism 20 between an operating state and a non-operating state in which free rolling of the seedling planting section 6 is enabled, when the biasing force of each of the grounding members 5a exceeds a set value. When the change setting mechanism 22 or 26 acts so that the control mechanism 20 becomes inactive, the operating mechanism 24 acts so that the biasing force of each of the grounding members 5a becomes smaller than the set value. When the change setting mechanism 22 or 26 acts, the control mechanism 2
A rice transplanter characterized in that a mechanism 25 is provided in which the operating mechanism 24 is linked so that the operation mechanism 24 is in the operating state.