JPH0711537Y2 - Planting depth control mechanism in passenger rice transplanter - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a planting depth control mechanism for a riding rice transplanter.

(B) Conventional technology Conventionally, a riding rice transplanter connects a planting section supported by a planting surface of a field with a float to the traveling section so as to plant seedlings while traveling in the field with the traveling section. The height adjustment mechanism of the float is provided to adjust the planting depth of the seedling by changing the height of the planting part supporting the planting claw from the planting surface of the field. It is configured.

Also, regardless of the unevenness of the planting surface in the field or the inclination of the machine body,
In order to support the planting part at a constant height from the planting surface and keep the planting depth of the seedling constant, a hydraulic lifting mechanism is provided between the running part and the planting part, A sensor interlocking with a hydraulic control valve that controls the hydraulic lifting mechanism is provided between the front end of the float and the planting section, and when the front end moves up and down, the height of the planting section becomes low and the seedlings become deep. As a (shallow) planting, the hydraulic lifting mechanism is operated to raise (lower) the planting part, and the planting part is supported at a certain height from the planting surface to achieve a seedling planting depth. Is kept constant.

Further, in recent years, the planting mechanism has been improved to improve the planting speed of seedlings. Therefore, it is becoming possible to increase the traveling speed during the planting work to make the planting work more efficient.

As for the neutrality of the planting depth during the planting work, there is a structure in which the operator adjusts the relative position between the planting frame and the float in multiple stages by operating the planting depth adjusting lever.

(C) Problems to be solved by the device However, in recent years, due to the improvement of the planting mechanism, the planting speed of seedlings has been improved. Therefore, the traveling speed during planting work is increased to increase the planting work. It is becoming possible to streamline,
Therefore, the following problems newly occurred.

That is, when the traveling speed during planting work becomes high, the water that has been flooded in the field wraps around the front lower surface of the float to generate dynamic buoyancy, and the float is pushed up by the water and always rises forward. Becomes

In this way, when the front end of the float moves upward, the hydraulic lifting mechanism is activated even if the seedlings have become deeply planted even though the planting surface is kept at a normal planting depth, and the planting part is moved to the planting surface. The problem arises that the planting depth of seedlings becomes shallower.

(D) Means for Solving the Problems In the present invention, an operation lever for changing the traveling speed of the machine body,
The planting depth adjusting lever, which adjusts the planting depth, is interlocked by the wire connecting mechanism via the lever guide, and the planting depth adjusting lever is set at the set position in synchronization with the lever operation to the high speed side of the operating lever. A planting depth control mechanism in a riding rice transplanter configured to act on a slightly deeper planting side, wherein the lever guide body includes a guide plate and a fixed plate fixed to the surface of the guide plate by being superposed on the guide plate. The guide plate is formed with an operating plate superposed on the back surface of the guide plate so as to be rotatable and slidable. The guide plate is formed with an elongated hole extending in the vertical direction at the central part, and the fixed plate is provided with the central part. To form a long hole that extends in the up-down direction and that matches the above-mentioned long hole, and a plurality of cut grooves that are inclined downward inward are formed at one edge of the long hole at intervals in the up-down direction. The engaging groove is formed in each cut groove, and the operating plate extends vertically in the center. Forming a long hole consistent with the slots,
An overhanging elongated hole that coincides with the cut groove is formed on one side edge of the elongated hole, and an engaging projection pressing surface is formed on the inner edge of the overhanging elongated hole. The lower end corner on the side of forming the elongated slot is pivotally supported by the guide plate, while the wire connecting mechanism is interlockingly connected to the upper end corner that is diagonally opposite to the lower end corner so that the actuation plate is centered on the pivot support. Is made rotatable in the downward inclination direction of the notch groove, and an engaging projection is attached inwardly downwardly in a slanting manner at an intermediate portion of the implantation depth adjusting lever inserted into each elongated hole of the lever guide body. Engagement protrusions and recesses are formed on the mating protrusions, the engagement protrusions are engaged with the cut grooves of the fixing plate through the protrusions and recesses to position the implantation depth adjusting lever, and the engagement protrusions are pressed. It is intended to provide a planting depth control mechanism structure for a riding rice transplanter, which is characterized in that the front end surface of the engaging projection is brought into contact with the surface.

(E) Action When performing planting work, set the planting depth adjustment lever to match the field and start the work, but operate the operation lever that changes the traveling speed of the aircraft to the high speed side to plant it. When the speed is increased, the operating plate of the lever guide body linked to the operating lever via the wire connecting mechanism is rotated, and the engaging projection pressing surface formed on the operating plate is cut into the notch formed on the fixed plate. It comes into contact with the tip end surface of the engaging projection engaged with the groove, and pushes and moves the engaging projection in the inward downward inclination direction, and moves the implantation depth adjusting lever supporting the engaging projection downward. Move it and adjust the planting depth to the side that is appropriately deeper than the set position,
The optimum planting depth can be secured by synchronizing with the traveling speed of the aircraft.

At this time, the operating lever and the operating plate of the lever guide body are interlockingly connected by the wire connecting mechanism, and the pressing surface of the engaging projection of the operating plate is in contact with the tip of the engaging projection attached to the implantation depth adjusting lever. In addition, even a slight movement of the operation lever can be reliably transmitted to the planting depth adjustment lever, and the planting depth adjustment lever can perform a minute planting depth correction to ensure an optimal planting depth. You can

Further, since the operation lever and the planting depth adjusting lever are mechanically interlocked by the lever guide body and the wire connecting mechanism, the assembling work and the maintenance and inspection work can be easily performed.

(F) Effects According to the present invention, the operation lever for changing the traveling speed of the machine body and the planting depth adjusting lever for adjusting the planting depth are interlocked and connected to the high speed side of the operating lever. Since the planting depth adjusting lever is configured to act slightly toward the deep planting side from the set position in synchronism with the lever operation of (1), the following effects are achieved.

Even if the machine speed increases and the planting speed increases, the planting depth is automatically controlled to the deep planting side, so planting work can always be performed with the optimal planting depth. It is a thing.

In addition, the driver does not have to perform a troublesome lever operation according to the speed, so that the driver can efficiently perform the work.

Further, according to the present invention, since the hand operation lever and the implantation depth adjusting lever are connected by the wire connecting mechanism, the structure thereof is simple, and the processing and assembly are easy, and the adjusting Work and maintenance inspections are easy and reliable.

(G) Example An example of the present invention will be described in detail with reference to the drawings.
Is a passenger rice transplanter machine equipped with an engine (2) mounted in the front and a transmission case (3) connected to the lower part. (4) is a bonnet that covers the engine (2), and is equipped with a steering handle (5), an accelerator lever (6) as an operation lever for changing the traveling speed of the aircraft, and an auxiliary shift lever (7) on the upper part. ing. (8) is a front wheel connected to the lower part of the transmission case (3), (9) is a rear wheel provided at the lower rear part of the fuselage, and a driver's seat (10) and a main gearshift lever are provided at the upper rear part of the fuselage. (11) and a planting part operating lever (12) are provided.

Also, (13) is a planting device connected to the rear (14) of the fuselage,
The parallel link mechanism (15) allows it to move up and down. (16) is a hydraulic cylinder that moves the planting device (13) up and down, and is connected to the link mechanism (15).

Reference numeral (17) is an interlocking connection with a planting drive section (19 ') which is connected to a planting frame (19) via a shaft joint (18) by a planting section drive shaft projecting rearward of the transmission case (3). is doing.

(20) is a planting mechanism that pivotally supports a rotating case (21) at the rear end of the planting gear case (20 ') and shafts with a planting claw (22) at both ends of the rotating case (21). By supporting the two planting claws (22), the planetary rotation enables the planting operation at high speed.

(23) is a main float, and (23 ') is a side float, which receives the buoyancy of the paddy field and supports the entire planting device.

(24) is a seedling platform tilted backward, and (25) is a seedling feeding device.

In FIG. 4, (26) is a planting depth adjusting lever for adjusting the planting depth in multiple stages, and the base connecting part (27) is pivotally supported on the fulcrum shaft (28) provided on the planting frame (19). It is freely rotatable.

Reference numeral (29) is a link body for interlockingly connecting the vegetation depth adjusting lever (26) with the main float (23) and the side float (23 '), which are formed in a pair of two departments.

Further, as shown in FIG. 3, the main float (23) is arranged at the center of the lower part of the planting part (C), and the side floats (23 ') are respectively positioned on the left and right sides. ) And the side float (23 ') are respectively connected to the pivot (23
-1) (23'-1) and the link body (29).

When adjusting the planting depth by lowering the adjusting lever (26) from the driver's seat, the adjusting lever (26)
The link body (29) and the float (23) that rotate the counterclockwise are raised upward, and therefore, the planting depth (a) can be adjusted to be deep.

The accelerator lever (6) for changing the traveling speed of the machine body and the planting depth adjusting lever (26) for adjusting the planting depth are provided via a lever guide body (50) as shown in FIGS. 5 and 6. And the wire connection mechanism (41 ') are interlocked for connection, and in synchronization with the operation of the operation lever (6) toward the high speed side, the planting depth adjusting lever (26) acts a little deeper from the set position to the planting side. Is configured as follows.

Then, as shown in FIGS. 5 and 6, the lever guide body (50) has a guide plate (30) and a fixed plate (which is fixed to the surface (a) of the guide plate (30) by being polymerized. 35) and an actuating plate (37) superposed on the back surface (b) of the guide plate (30) so as to be rotatable and slidable. The guide plate (30) includes:
An elongated hole (31) extending vertically is formed in the central portion, and an elongated hole (32) extending vertically in the central portion and matching the elongated hole (31) is formed in the fixing plate (35). Together with
A plurality of notch grooves (33) inclined downward inward are formed at one side edge of the elongated hole (32) at intervals in the vertical direction, and each notch groove (33) is used for engagement. The concavo-convex portion (36) is formed, and the actuating plate (37) is formed with a long hole (40) extending in the vertical direction at the central portion and coinciding with the long holes (31) (32). An overhanging elongated hole (40a) matching the cut groove (33) is formed on one side edge of the elongated hole (40), and an engaging projection is pressed against the inner edge of the overhanging elongated hole (40a). Forming a surface (46).

Moreover, while the lower end corner portion (38) of the actuating plate (37) on the side where the overhanging elongated hole is formed is pivotally supported by the guide plate (30), the lower end corner portion (3) is also supported.
8) The wire connecting mechanism (41 ') is interlockingly connected to the upper end corner portion (37a) diagonally opposed to the operation plate (37), and the working plate (37) is inclined downward about the pivotal support portion. It can be rotated in any direction. (39) is a pivot pin.

As shown in FIGS. 5 and 6, the midway part of the implantation depth adjusting lever (26) is inserted into each of the elongated holes (31) (32) (40) of the lever guide body (50). And the engaging projection (43) is attached to the middle part of the engaging projection (43) in a downward slope.
An engaging concave and convex portion (44) is formed on the fixing plate (35).
Engage the protrusions (43) with the notches (33) in the concave and convex portions (36) (4
4), the implantation depth adjusting lever (26) is positioned, and the tip surface (45) of the engaging projection (43) is brought into contact with the engaging projection pressing surface (46). . (47) is a fixing fitting for fixing the tip of the outer wire (42).

Further, FIG. 7 shows another embodiment, in which the fixing plate (35 ') shown in FIG. 7 (a) is constructed such that the cut groove (33') has a gentle inclination angle. The fixing plate (35 ″) shown in is the notch (3
3 ″) has an acute inclination angle.

The present invention has the above-mentioned structure, and accordingly,
In the figure, when the accelerator lever (6) is at the low speed position (d), the vegetation depth adjusting lever (26) is held at the set position (e), but when the traveling speed of the aircraft is increased to increase the planting speed,
Rotate the accelerator lever (6) to the high speed side (f).

Then, the actuating plate (3
When 7) is rotated clockwise, the long hole (4
The engaging projection pressing surface (46) of (0) is the implantation depth adjusting lever (26).
The front end surface (45) of the engaging projection (43) of is pressed to the right, so that the engaging projection (43) operates downward along the inclined cut groove (33) of the fixing plate (35). At the same time, the adjusting lever (26) integrally operates downward to increase the planting depth.

Due to the relationship with the vegetation depth adjusting lever (26), not only the accelerator lever (6) but also the main speed change lever (11) and the auxiliary speed change lever (7) can perform the same operation as described above. .

Further, as shown in FIG. 7, the working amount of the implantation depth adjusting lever (26) can be variously adjusted by changing the inclination angle of the cut groove of the fixing plate.

The operation of the hydraulic cylinder (16) of the lifting mechanism (D)
It is controlled by a hydraulic control valve (69) shown in FIG. 8. The control valve (69) is a sensor (S) that detects a variation in height difference between the planting part (C) and the main float (23). Controlled.

That is, the sensor (S) is the same as the main float (23).
The pivot support (23b) is projected on the front upper surface of the
Pivotally attach the lower end of the sliding rod (71) with the long hole (70)
In the same long hole (70), the front extension part (20) of the planted gear case (20 ')
Insert the guide pin (72) protruding from a) so that it can move freely,
The spool (7) of the hydraulic control valve (69) is attached to the upper end of the sliding rod (71).
The outer of the wire (74) connected to 3), the inner (75) of the wire (74) is connected to the guide pin (72), and the main float (23) moves up and down to move the wire (74). The expansion and contraction are transmitted to the spool (73) of the hydraulic control valve (69) to operate the hydraulic cylinder (16).

The hydraulic control valve (69) is a five-position control valve, which blocks the hydraulic cylinder (16) side at the central neutral position (76) and hydraulically operates the choke (81) at the left side position (77). The pump (P) and the hydraulic cylinder (16) are connected, and the left side position (79) directly connects the hydraulic pump (P) and the hydraulic cylinder (16) to the right side position (80) of the neutral position (76). ) Connects the hydraulic cylinder (16) and the reservoir (82) with the choke (81) interposed, and further connects the hydraulic cylinder (16) and the reservoir (82) directly at the right outer position (83). There is.

Therefore, the position of the planting part (C) is low and the wire (74)
When the hydraulic control valve (69) side of the inner (75) is pulled in, the spool (73) is moved to the left to contract the hydraulic cylinder (16) to raise the planting section (C), and reverse. Inner part (75) of the wire (74) where the position of the planting part (C) is high
When the hydraulic control valve (69) side is pulled out, the spool (73) is moved to the right to extend the hydraulic cylinder (16) and the planting section (C) is lowered to lower the planting section (C). ) Is supported at a constant height, and the planting depth of seedlings is kept constant.

In addition, the hydraulic cylinder (16) side is blocked at the central neutral position (76), and the choke (7
8) with hydraulic pump (P) and hydraulic cylinder (1
6), and further, the hydraulic pump (P) and the hydraulic cylinder (16) are directly connected at the left side position (79) thereof, and the choke (81) at the right side position (80) of the neutral position (76).
By connecting the hydraulic cylinder (16) and the reservoir (82) with the interposition of, and directly connecting the hydraulic cylinder (16) and the reservoir (82) at the right outer position, it is suitable for the optimum planting depth. Planted part (C) and main float (23)
When the absolute value of the deviation from the set value of the height difference between and is small, the planting section (C) moves up and down at low speed, and when the absolute value of the deviation is large, the planting section (C) is By moving up and down at high speed, stepwise proportional operation is performed.

As described above, according to the present invention, the operation lever (6) for changing the traveling speed of the machine body and the planting depth adjusting lever (26) for adjusting the planting depth are interlocked by the wire connecting mechanism (41 '). Then, in synchronization with the lever operation of the operation lever (6) to the high speed side, the planting depth adjusting lever (26) is configured to act slightly on the deep planting side at the set position. Even if the traveling speed becomes faster and the planting speed becomes faster, the planting depth is automatically controlled to the deep planting side, so planting work can always be performed with the optimal planting depth. Is.

Also, since the driver does not have to do a troublesome lever operation according to the speed, the work can be done efficiently. Especially, according to the present invention, the hand operation lever and the planting depth adjusting lever are connected by wire. Since they are connected by a mechanism, they can be easily processed and assembled, and adjustment work and maintenance inspection can be done easily and reliably.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall side view of a passenger rice transplanter equipped with the present invention, FIG. 2 is the same plan view, and FIG. FIG. 4 is a perspective view showing a connection state with a float and a side float, FIG. 4 is a side view of an essential part of the present invention, and FIGS. 5 to 7 are front views of the essential part.
FIG. 8 is a hydraulic circuit diagram for controlling the lifting mechanism. (1): Airframe (6): Operation lever (26): Vegetation depth adjustment lever (41 '): Wire connection mechanism

Claims (1)

[Scope of utility model registration request] 1. A wire connecting mechanism (4) comprising an operating lever (6) for changing the traveling speed of the machine body and a planting depth adjusting lever (26) for adjusting the planting depth via a lever guide body (50).
1 ') interlockingly connected so that the planting depth adjusting lever (26) acts slightly toward the planting side from the set position in synchronization with the operation of the operating lever (6) toward the high speed side. A planting depth control mechanism in a rice transplanter, wherein the lever guide body (50) includes a guide plate (30) and a guide plate (3).
Fixing plate (35) fixed on the surface (a) of (0) by polymerization.
And an actuating plate (37) which is mounted on the back surface (b) of the guide plate (30) so as to be rotatable and slidable. The guide plate (30) extends vertically in the central portion. The long hole (31) is formed, and the fixing plate (35) is formed with a long hole (32) extending in the vertical direction at the central portion and coinciding with the long hole (31). ) A plurality of notch grooves (33) are formed at one side edge of the inward downward slope with a space in the vertical direction, and each notch groove (3
An engaging concave-convex portion (36) is formed in 3), and the operating plate (37) has a long hole (40) extending in the vertical direction at the central portion and coinciding with the long holes (31) (32). To form an overhanging elongated hole (40a) at one side edge of the elongated hole (40) that matches the cut groove (33), and to form an inner edge of the overhanging elongated hole (40a). An engaging protrusion pressing surface (46) is formed on the guide plate (30), and the lower end corner portion (38) of the actuating plate (37) on the side of the projecting elongated hole is pivotally supported on the guide plate (30). Division (3
8) The wire connecting mechanism (41 ') is interlockingly connected to the upper corner portion (37a) diagonally opposed to 8), and the operating plate (37) is inclined downwardly of the notch groove (33) around the pivot portion. The lever projection (50), and the engaging projection (43) is inserted in the middle of the planting depth adjusting lever (26) inserted into the long holes (31) (32) (40) of the lever guide body (50). Mounting in a downwardly sloping direction, the same protrusion (43)
An engaging concave and convex portion (44) is formed on the fixing plate (35).
Engage the protrusions (43) with the notches (33) in the concave and convex portions (36) (4
(4) Engagement via 4) to position the implantation depth adjusting lever (26), and the tip surface (45) of the engaging projection (43) is brought into contact with the engaging projection pressing surface (46). Depth control mechanism for passenger rice transplanters.