JPS6265609A - Lifting and falling apparatus for rice planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elevating device for a rice transplanter in which a planting section is mounted on a traveling vehicle so as to be movable up and down via a link mechanism.

"Prior Art" Conventionally, as shown in the specification of Utility Application No. 6O-80E175,
We have developed a technology that is equipped with a hydraulic cylinder and hydraulic switching valve that raises and lowers the planting section, and returns the hydraulic switching valve to neutral in conjunction with the lifting operation of the hydraulic cylinder that raises and lowers the planting section.

"Problems to be Solved by the Invention" The above-mentioned conventional technology was able to return the hydraulic switching valve to the neutral position in conjunction with the upward A movement of the planting section, but it was possible to return the hydraulic switching valve to the neutral position in conjunction with the upward A movement of the planting section. If the A lowering bar is held in the raised position by a spring and the operation of the A lowering bar is simplified, it is not possible to easily connect the raising/lowering lever and the hydraulic switching valve. Therefore, by connecting the A lowering bar to the piston rod of the hydraulic cylinder with a wire or the like, it was possible to easily return the elevator lever to neutral when the planting area was raised, but the operating force was reduced during the transition period of the hydraulic switching valve. There was also a problem that the lifting lever would not return to the neutral position when hooked, and there were also problems such as the 91 lowering lever not returning to the neutral position and overstroke.

"Means for Solving the Problems" However, the present invention provides an operation 1 in which an elevating lever for elevating and lowering the planting section is held at the first position by a spring.
A restoring spring is provided for forcibly returning the elevating lever to the neutral position in conjunction with the 7A operation of the planting section.

"Function" Therefore, the interlocking mechanism that returns the 9g lowering lever to neutral due to the upward movement of the planting section can be simply configured, and by fully operating the restoring panel at the end of the interlocking stroke of the lever, the hydraulic pressure switching can be performed. The lowering lever and the hydraulic switching valve can be reliably returned to neutral by eliminating problems such as the operating force being hooked during the transition period of the valve, and the range of returning to neutral of the restoring spring can be easily adjusted. The neutral position of the bar can be easily set, and a stable A-down switching operation can be easily obtained by a simple operation of the H-down bar.

"Example" An embodiment of the present invention will be described below in detail with reference to the drawings.

Fig. 1 is a side view of the main parts, Fig. 2 is an overall side view of the passenger [mouth transplanter], Fig. 3 is an overall plan view of the same, Fig. 4 is a rear view of the same part,
Figure 5 shows a side view of the same part, and in the figure (1) is a traveling truck on which a worker rides, an engine (2) is mounted on a base frame (3), and the engine (2) is mounted on a bonnet (
4), and also a mission case (5) at the rear end of the base frame (3).
5) A transmission case (6) is integrally installed on the left and right inner sides of the rear end. The front ten wheels (8) for left and right water I11 running are attached to the front left and right sides of the transmission case (5) via axle frames (7), and the front ten wheels (8) for running left and right water I11 are attached to the rear outside of each transmission case (6). The rear wheels (8) are supported, and the driver's seat (10) in which the driver sits is attached to the L side of the transmission case (6) via the driving frame (11). 4) are equipped with pre-removal tables (12) on both the left and right sides, and a steering handle (13) is provided at the rear of the honnet (4) and in front of the driving island (10) to form a stem (14a). Heavy body cover (14)
covers the 1- side of the transmission case (6), etc.

In the figure (15) is a cutting stand (18) for multi-row planting.
This is the planting section where the rear tilting seedling stand (16) is attached to the left and right sides of the planting case (20) via the guide rail (18) and kite rail (18). The planting claw (17) is attached to the planting case (20) via a planting arm (21) supported by the reciprocating motor I and moved by a crank, and a planting claw drive shaft (22).

Main flow for leveling below the planting case (20))
(23) and left and right side flows) (24) (24)
At the same time, a link hitch (25) is provided on the front side of the planting case (20), and the driving frame ( 11) The link hitch (25)
A hydraulic cylinder (29) for raising and lowering the planting part (15) is interposed between the transmission case (5) and the top link (26), and the output of the engine (2) is transferred to the transmission case (5). Front and rear wheels for transmission and running in rice fields (8)
(9) is driven at a substantially constant speed, and at the same time, the planting claw (17
) so that seedlings can be continuously taken out and planted in the field.

As shown in FIGS. 4 and 5, the shift rod (32) and shift arm (33) for main shift operation are connected via a longitudinal swing fulcrum shaft (34), a left/right swing fulcrum shaft (35), etc. The traveling speed change lever (36) is connected and supported, and the speed is changed along the guide groove (38) of the lever guide plate (37a).
<-(36) is configured to swing back and forth to change the driving mode to on-road speed, neutral conflict planting speed, and backward driving as appropriate.

The driving frame (11) also has left and right width axis cases (
fl) A horizontal frame (39) connected between (8), and left and right vertical frames (40a) whose lower ends are fixed to the horizontal frame (39) and whose upper ends support the heavy body cover (14).
(40b), and is a planting lifting mechanism that expands and contracts the hydraulic cylinder (29) as appropriate.
) to the guide frame (42) and the valve bracket) (4
It is fixedly supported via 2a). Further, a bearing sleeve (43) is fixed to the vertical frames (40a) (40b), and an operation rotating shaft (44) is inserted through and supported by the receiving sleeve (43). The right end is operatively connected to a planting lift lever (46) via a left-right swing fulcrum shaft (45). The switching valve (41) is attached to the rotating shaft (44).
) is integrally fixed with an operating piece (48a) that is brought into contact with the spool (47) of the clutch arm (50
) is fixed to the rotating shaft (44), and the lever guide plate (
37b) along the guide groove (51) of the lifting lever (
46) back and forth, the planting part (1
5) is configured to carry out the important operations of the lifting and planting clutch.

Further, an interlocking arm (5) is provided at the left end of the rotation shaft (44).
2) is fixed, and an interlocking pin (54) is supported via a holder (53) in the middle of the speed change lever (36), and when the speed change lever (36) is swung from a forward position to a reverse position, The tip of the interlocking pin (54) is engaged with the interlocking arm (52), and the operating piece (48a) is rotated integrally through the rotation shaft (44) to rotate the spool (47).
It is configured to move the planting part (15) back and forth and move the planting part (15) to "-W". The pin (54) is inserted into the holder (53) fixed to the middle of the speed change lever (36) and is connected to the rotating shaft (4).
4) is supported so as to be slidable in the axial direction, and is provided so that the tip of the pin (54) protrudes toward the interlocking arm (52) using a compression spring, etc., and the gear shift lever (36) is tilted to the right side to move forward. When switching from the planting position to the reverse position, the tip of the pin (54) is engaged with the front end of the interlocking arm (52) with the lift lever (46) in the lowered position to rotate the rotating shaft (44). , convert the lowering lever 91 (4B) to the raised state and operate the hydraulic switching valve (41) which is the lifting mechanism to move the planting part (15) to JJ? It is configured to allow Further, the lift lever (46) is biased by a fulcrum cross-over spring (57) to maintain the lever (46) at that position when the lever (46) is converted to the hinged position or the first hinged position. The rotating shaft (4
4) Fixed to the right end of the receiver A (83) and raised and lowered 8-(
46), there is a spring (64) for restoring the left and right tilt.
is being strung up.

Further, another operating piece (48b), which is adjacent to the operating piece (48a) and has one end in contact with the spool (47), is freely rotatably supported on the rotating shaft (44). , main flow) (23) is connected to the operation piece (48b) via the soft sensitivity adjustment lever (66),
) (23) With the change in ground pressure, the spool (
The planting section (15) is automatically controlled to maintain the ground pressure of flow (23) approximately constant, and the topsoil is adjusted by swinging the adjustment lever (86). It is configured to adjust the sensitivity of the load applied to the float according to each hardness, such as hard, soft (dry field, wet field), and standard hardness.

Next, as shown in FIGS. 1 and 4, the rotating shaft (44
), a receiving lever (67) is fixed, a sleeve sleeve (69) is provided on the right vertical frame (40b) via a support shaft (68), and a roll (70) is brought into contact with the receiving lever (67). The pressure lever (71) is pivotally supported at the tip of the pressure lever (71).
1) Fix the base end to the sleeve sleeve (B9) and press the lifting lever (
46) is lifted, the receiving lever (67) is brought into pressure contact with the roll (70) and the pressure lever (71) is moved backward.

Further, a stopper (72) for regulating the downward swing of the lift lever by the pressure lever (71) is provided on the sleeve sleeve (B8), and a stopper (72) is provided on the vertical frame (40b) for adjusting the neutral position (73). 72), one end of the restoring wire (75) is connected to the piston rod (70) of the hydraulic cylinder (28) that raises the planting part (15), and the arm (76) of the sleeve sleeve (88) Restoration spring (77
), the wire (75) is pulled by advancing the piston rod (74), and the spring (77) is pulled in conjunction with the upward movement of the planting part (15).
), the roll (70) is brought into pressure contact with the receiver lever (67), the JJI lowering lever 6) is returned to the neutral position, and the stopper (72) is brought into contact with the bolt (73). As shown in the figure, the receiver lever (
67) and the pressure lever (71) (B:A
), the lever ratio (B':A') of each lever (87) (71) on the neutral side is smaller than that of the wire (75).
The spring (77) force stored by the tension of each lever (
67) It acts more strongly at the end of the interlocking stroke of (71), and the hydraulic switching valve (41) and lifting lever (46)
is configured to return to the neutral position all at once from this transition period.

The present embodiment is constructed as described above, and by operating the lift lever (46) back and forth at the rear part of the guide groove (51), the hydraulic valve (41) is activated via the operation piece (48a). While moving the spool (47) to raise/lower or fix the planting part (15), the guide groove (
The planting clutch is turned on and off via the clutch wire (49) by operating the front part of the lever (51) back and forth, and by lifting the lift lever (46), this lever ( 46) is supported in the raised position by the spring (57), and the piston rod (74) of the hydraulic cylinder (29) advances to raise the planting part (15), and in conjunction with this, the planting part (15) is The spring (77) is pulled by the force of the spring (77), and the roll (70) of the pressure lever (71) is pressed against the receiving lever (87), and the stopper (72) is in neutral contact with the pole (73). This is to return the lift lever (46) to the position.

Furthermore, FIG. 7 shows another embodiment, in which the spring (7
7) is omitted and the restoring wire (75) is directly connected to the arm (76), a restoring spring (78) with a fulcrum is provided, and this spring (78) is connected to the arm (76). The advancement of the piston rod (74) of the cylinder (28) causes the wire (
75) and roll (70) of the pressure lever (71).
is brought into pressure contact with the receiving lever (87), and the elevating lever (46) is moved to the neutral side, and each of the levers (87) (7) is moved to the neutral side.
The spring (78) is activated at the end of the linked stroke in step 1), and the force of the spring (78) returns the lift lever (46) to the neutral position. Note that a wire (7) is connected to the piston rod (74) via a buffer spring (75a).
5) are connected.

Furthermore, FIG. 8 shows another embodiment, in which pressurized /<
- Install Bushrod page 79) instead of (71),
The restoring spring (80) causes the rod (79) to come into contact with the receiver lever (67) and move the lifting lever (46) to the neutral side, and the rod (79) moves against the spring (80).
A stopper (81) such as a nut that restricts the advance of the rod (9) is screwed onto the screw (79a) of the rod (79) so that its position can be adjusted freely. In addition, a lock bin (82) is provided that locks the bushing rod (79) when the lift lever (46) is in the raised position when the rod (79) is retracted, and a restoring wire ( 75) to connect the lock bin (82). Then, by lifting the lifting lever (46), the bushing rod (79)
is retracted to engage the lock bin (82), and the piston rod (70 is advanced) to open the planting portion (1).
5) is raised, the lock bin (82) is pulled out via the wire (75), the bushing rod (79) is protruded by the force of the restoring spring (80), and the lifting lever (46) is set to the neutral position by the stopper (81). This forcefully returns the object to its original position.

"Effects of the Invention" As is clear from the above embodiments, the present invention has a planting part (15
) is operated by a spring (5).
7), the lifting lever (46) is moved in conjunction with the lifting operation of the planting part (15).
) forcibly returning to the neutral position (77) (79)
(110), it is possible to simply configure an interlocking mechanism that returns the elevating lever (46) to the neutral position by the upward movement of the planting part (15), and the restoring spring is activated at the end of the interlocking stroke of the lever (4B). (77) (78) (80) By applying sufficient force, problems such as coupling of operating force during the transition period of the hydraulic switching valve (41) can be eliminated, and the lifting lever (46) and the hydraulic switching valve ( 41) can be reliably returned to neutral, and the restoring spring (77) (7
8) The neutral return range of (80) can be easily adjusted, the neutral position of the lift lever (46) can be easily set, and stable lift switching operation can be easily obtained by simple operation of the lift lever (46). It has the following effects:

[Brief explanation of the drawing]

Fig. 1 is a side view of the main parts showing an embodiment of the present invention, Fig. 2 is a side view of a riding rice transplanter, Fig. 3 is a plan view of the same, Fig. 4 is a rear view of the main parts, and Fig. 5 6 is a side view of the same part, FIG. 6 is an enlarged view of the same part, and FIGS. 7 and 8 are side views of main parts showing other embodiments. (15)... Planting part (46
)... Lifting lever (57)... Spring (77) (78) (80)... Restoration Spring applicant Yanmar Agricultural Machinery Co., Ltd. agent Tadashi Fujiwara Tsujiyokukan Lacquer
6 Ω

Claims (1)

[Claims] In an operation in which a lifting lever for raising and lowering a planting part is held in a raised position by a spring, a restoring spring is provided that forcibly returns the lifting lever to a neutral position in conjunction with the raising operation of the planting part. Characteristic lifting device for rice transplanters.