JPS61100113A - Agricultural working machine for rice field - 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] [Industrial Application Field] - This invention relates to agricultural machinery for paddy fields such as walk-behind rice transplanters and seeding machines. This relates to an agricultural machine for paddy fields in which the hydraulic switching valve is switched by the cooperation of a plurality of ground floats located on the left and right sides of the machine to move up and down with a device, thereby reducing the horizontal inclination of the vehicle body and propelling the machine. be.

[Prior art]

Conventionally, in walk-behind rice transplanters, the left and right running wheels are individually operated up and down by hydraulic cylinder devices, and the hydraulic switching valves of each hydraulic cylinder device are located on the left or right side of the left-right center of the vehicle body. A technique for preventing the vehicle from being propelled while tilting significantly to the left or right by switching the ground floats individually is well known, as seen in Japanese Utility Model Publication No. 49301/1983.

[Problem that the invention seeks to solve]

The prior art does not have a structure in which the running wheels on each side are controlled up and down by a plurality of grounding floats located on the left side or a plurality of grounding floats located on the right side, so the grounding area of the grounding floats is insufficient. The grounding float could not operate properly due to fluctuations in the grounding. Furthermore, if the ground pressure is increased by widening the horizontal width of the ground float, mud pushing becomes noticeable and accurate up and down movement is not possible. For this reason, there was a problem in that the vertical control of the left and right running wheels was not accurate.

However, in order to solve the problems of the above-mentioned prior art, the grounding float is divided and a plurality of grounding floats are provided on the left side, and a plurality of grounding floats are provided on the right side. A configuration was devised in which the switching valve of the hydraulic cylinder device was switched by the cooperation of individual ground floats. However, although the grounding float has at least the role of leveling the planting position and leveling the sowing position, in order to adjust the planting depth and sowing depth, the mounting position of the grounding float must be adjusted. must be adjusted up and down relative to the vehicle body. In this case, if a single ground float is adjusted up or down, a new problem arises in that the predetermined setting state in which the hydraulic switching valves were previously switched cooperatively is disrupted, resulting in an unexpected situation where accurate control of the traveling wheels is no longer possible. A situation arose.

[Means for solving problems]

The present invention has taken the following technical measures to solve the above-mentioned conventional technology and new problems that arise when improving it.

That is, the present invention is configured to separately drive and install the left and right sides,
In a walk-behind agricultural machine with a control handle α force attached to the rear, a pair of left and right front medial grounding floats 0υ
・Pair of left and right posterolateral grounding floats (78) and (79)
) and a single rear inside grounding float (80) are attached to the vehicle body so that the rear side can be adjusted up and down in conjunction with each other, and the front part of each grounding float can be freely moved up and down, and the front part of each grounding float can be freely moved up and down, so that The front inner grounding float (31) and the rear outer grounding float (78) located on the left side jointly switch the operating hydraulic pressure switching valve (9) of the hydraulic cylinder device 1 which operates the left traveling wheel α4, and the right side The front inner grounding float (2) located at Each ground float on the left and right side 0υ・(2), (78)・(79)
The structure of the agricultural machine for paddy fields is such that the ground pressure of the ground pressure is maintained so that it does not fluctuate before and after adjustment.

〔Example〕

A rice transplanter that is an embodiment of the present invention will be described in detail based on the drawings. (1) is a travel/mitsushicon case. (2) is an engine base and is attached to the front side of the traveling transmission case (1).

(3) is a frame that also serves as a transmission case, (4) is a planted transmission case, and 5 (5), which is attached to the rear end of the frame (3), is an engine at the front end of the engine base (2). It is placed on the top side. (6) and (7) are hydraulically pumped. (9a) and 00a) are valve switching arms.

Then, these hydraulic pumps (6) and (7) and the hydraulic tank (
A hydraulic unit αυ consisting of a hydraulic switching valve (9) and αO is attached to the rear part of the engine base (2-in).

(2) and (to) are chain cases, which are pivoted to the boss part of the traveling mission case (1) so that the inside of the base rotates around the drive shaft that protrudes to the left and right outside of the traveling mission case (1). are doing. Q4) and (2) are running wheels that are supported by the chain case @ and α3.

αQ and αQ are sub-planted transmission cases, which are provided separately on both left and right sides of the planted transmission case (4) via horizontal tube cases (not shown).

αη is a control handle whose base is the planted transmission case (4
) side and extends upwardly on both the left and right sides of the rear. A~ is a seedling tank, which is disposed along the control handle αη, and is supported by the base side and intermediate part of the handle Q7) so as to be able to reciprocate from side to side. α is a moving rod, which is connected to the reciprocating mechanism in the planting transmission case (4) and is provided so as to protrude from both left and right sides of the case (4),
Attach the mounting arm 4 (1) to this and attach the seedling tank (
A reed and a seedling tank (to) are connected to the reed and seedling tank (to) so that they can be moved back and forth from side to side.

? υ, 12υ... are seedling planting tools, which are attached to the planting transmission case (4) and sub-planting transmission cases αe and QQ by a crank and a swinging arm, and are used to transfer the seedlings from the seedling tank (to). Seedlings are divided and engaged and planted on the lower soil surface. (a) is the bonnet, and this bonnet (
A spare seedling support frame (2) is integrally attached to the rear and part of 2).

(2) is a hydraulic cylinder device, which is held elastically by rear springs on the left and right ends of a horizontal frame (1) whose left and right intermediate portions are fixed to the upper front end side of the engine pace (2). Cylinder C24A)/(25B
), attach the base 1 side of the piston (24b>・(25b
) is provided so as to protrude rearward. The tip sides of the pistons (24b) and (25b) are pivotally connected to an arm holder (7) that is integral with the chain case (2).

c3η・(2) is a front inner grounding float, which is arranged on the front side between the running wheels q4 and 00 on the left and right sides, and has a rear upper part provided at the bottom of the frame (3).
A mounting bracket (to) is attached to a pin (to) that is provided at the tip of the balance arm, whose front and rear intermediate portions are pivotally connected to the left and right sides.
(to).

(B) and (to) are the valve switching arms (9a) and (10a).
) is an interlocking plate fixed to the top of the

(To) The ring is an interlocking pipe, and its upper part is connected to the interlocking plate (2).
) and (to) are connected with pins.

(The 41 horizontal shaft penetrates the engine base (2) and is pivotally mounted. (4) is a rotating arm, which is rotatably attached to both the left and right ends of the horizontal shaft (41). The distal ends are pivoted. (44) and (45) are lofts bent into an L shape, and their bases are connected to the rotating arms (42) and (45).
43), insert the tip side into the interlocking pipe (2) and ring, and fix washers (46) and (47) to this loft to stop the interlocking pipe (to) from descending. There is.

(4th) and (49) are square tubes, and the left and right rotating arms (
42) and (45) with pins (50) for free rotation.

(51) and (52) are the ground floats 0 and (2)
This is a bracket fixed to the front upper part of the
)・The lower part of (54) is bent and pivoted to form the square tube (48).
・Insert the upper part into (49) and tighten this pin 63)・(54)
) has a screw finish on the upper end, and a nut 65)
- (56) is screwed together to prevent removal. Then, springs (57) and (57) are provided between the square tubes (48) and (49) and the pins 65) and 64), and the ground floats 01) and
(to) are provided so as to be shot down against the rotating arms (42) and (43).

(It is an interlocking fitting for simultaneously operating the 58 company switching valve (9) and QQ. It is a horizontal axis pivoted freely on the protrusion frame (59) that is integrally attached to the hydraulic tank (8). (6
Plate bodies (61) and (62) are fixed to both left and right end sides of 0), and the left and right plates (61) and (6) and the interlocking plates (B) and (To) are used for free movement. Long hole (65)/(63)
They are connected via lofts (64) and (65) that engage with. The left plate (61) is interlocked with a hydraulic pressure switching operation lever (66) provided on the control handle αη side via an interlocking wire (67).

(68) is an interlocking metal fitting for adjusting the switching resistance of the switching valve (9) and αG, and a plate is attached to both left and right ends of the shaft (70) which is pivoted to the bracket (69) attached to the protruding frame (59). The bodies (71) and (72) are fixed, and the plates σ1) and
(72) and the lower end sides of the valve switching arms (9a) and (10B) are hung by springs (73) and (74). In addition, the springs (79 and (74) are provided in the engagement portions of the plates (71) and (72) in the boss holes of (75) and (75), and the springs (
75) and (74) can be reduced to zero. Then, the tension of the springs (73) and (74) can be changed and adjusted by connecting this left plate body σ1) to the sensitivity adjustment lever σ6), which can be rotated and adjusted, provided on the control handle side using an interlocking wire (77). It is set up like this.

(78)・(79 company's rear outer grounding float, located on the outer side of the left and right running wheels α4 and aFJ. (8
0) is the rear medial grounding float, and the left and right running wheels σa-Q
! It is located in the rear part between 19 and 19. The rear portion of each of these grounding floats σ8), (79), and (80) is attached to a bracket (81) fixed to the control handle αη.
) The arm (83) is attached to the horizontal shaft (82) which is freely rotatable.
・(83)・(83) and pin (84)・(84)・(8
4) and brackets (85), (85), and (85), and the front part is attached to the planting transmission case (4), a link that can be expanded and contracted to the sub-planting transmission case α (! -Qe).
86) and (86), the front part of each grounding float is provided to be able to move freely up and down.

(With the 8-point grounding float vertical adjustment lever, the base side is fixed to the horizontal shaft (8), and the middle part is inserted into the notched groove drilled in the lever guide plate (88) fixed to the control handle αη. It is provided so that it can be locked by changing its rotation angle.

(89) Connect the rear end of the balance arm (■) and the adjustment lever (87) with a fi interlocking wire, and connect each ground float (78) on the rear side with a leash wire and the adjustment lever (87). - When the rear portions of (79) and (80) are adjusted up and down, the rear pivot portion of the front inner grounding float 6D-(2) is also adjusted up and down in the same direction.

(90) and (91) are interlocking pipes, which are attached to the supporting shafts (
The pipe (90) and the ground float (78) and the pipe (91) and the ground float (79) are inserted into and supported by the floating slot (94) and (94) in a free rotation manner.
Connecting rods (95) and (96) with
) and (98).

(99) and (100 companies) The protruding arms have their bases fixed to the interlocking pipes (90) and (91), and their tips protrude upward.

(101) and (102) are shafts that are rotatably supported on brackets (103) and (104) attached to the upper part of the plate (3). and arms (105) and (106) that protrude downward.
) and (107) and (108) are fixed, and the arm (107) and (108M front protrusion arm (
It is connected to 99) and (100) via interlocking pins 109) and (110). In addition, an arm (10
5) and (106) are the valve switching arms (9a) and (1
0a) via rods (111) and (112). At this time, the tips of the rods (111) and (112) are configured as screws, and nuts are screwed into these to ensure that the cylindrical bodies (113) and (1) are fixed to the arms (105) and (106).
14), insert the rods (111) and (112), and connect the cylinder bodies (115) and (114) to the nut (11
5) and (116) seconds, springs (117) and (118) are interposed. (119) and (120) are nuts as stoppers.

(121) is a planting clutch operating lever for turning on and off the seedling planting clutch. Of course, this planting clutch operation lever (121) is interlocked with the planting clutch via a wire, but it is also interlocked with the plate (61) and υ1) to operate the planting clutch. "cut"
In the "off" position (a) of (A), the springs σ3) and σ4) are relaxed, and when the plate is moved from this "off" position to the position (/'), which is further toward the "cut" direction, the plate body ω1)・(6
2) in the direction of the arrow) to open the hydraulic switching valve (9)・α
It is convenient if O is configured so that both the running wheels αX and αG are switched to the side in which they move downward. In the position (c), the seedling planting clutch is in the "on" position.

In the upper configuration, top mat-shaped seedlings are placed on the seedling tank (to), and each part is driven by the engine (5) to propel the rice transplanter in the paddy field. At this time, each ground float 0υ・
All of the workpieces (78), (79), and (80) slide in contact with the soil surface.

Then, each seedling planting tool Q1), T2D... is attached to the seedling tank (
(to) - - Divide and engage the seedlings one by one, and attach the ground float (7 to 7).
8) Plant seedlings one after another on the soil leveled in steps (79) and (80).

In this way, while the seedling planting work is carried out, the running wheels (14) and aυ are brought into contact with the plowing surface of the field and rotated, thereby exerting a propulsive force.

If the depth of the plow surface changes in the forward direction or in the left and right directions with respect to the forward direction, the supporting force of the traveling wheels will change, so each ground float 3υ・(to)・(
The front parts of 78), (79), and ω0) move up and down.

In other words, if the tiller becomes uniformly shallow or deep as a whole, each ground float 0]), (2), (78),
The front parts of σ9) and (80) move up and down together. Then, from the anteromedial grounding float 6η・Q, there is a bracket (51
)・(52), pin (55) - (54), spring (57
)・(57), Square tube (48)・(49), Rotating arm (
Connect the valve switching arm (9
a)・(1,0a) is also the posterolateral grounding float (
From 78) and (79), there are connecting fittings (97) and (98),
Connecting rods (95)/(96), interlocking pipes (90)/(9
1), protruding arm (99)/(100), interlocking rod (10
9)・(110), Arm (107)・(108), Axis (101)・(102), Arm (105)・(106
), rod (111)/(112), interlocking plate (b)/(
The valve switching arms (9a) and (10&) are jointly rotated through the hydraulic switching valves (9) and αG to switch to the next mode.

That is, when the plowing platform becomes shallow, the machine body is moved upward, so each of the grounding floats 0υ, (a), (78), and (79) descend.

For this reason, the anteromedial grounding float 61) and the pin (
44)/G45) and the interlocking pipe (to)/(32) are free to slide, so they cannot be directly connected to the valve switching arm (9a).
)・(10B) is not activated and the spring (73) −(7
4) Tension deer and posterolateral grounding float (78)/(79
) side, the hydraulic pressure switching valves (9) and aO are switched so that the pistons (24b) and (25b) are retracted into the cylinders (24B) and (25&), and the running wheels αΦ and (
(to) moves upward.

On the other hand, when the tiller becomes deeper, the ground float 6υ・(
Since the front parts of 2), (78), and (79) are pushed up by the soil surface, the hydraulic switching valves (9) and
αG switches the pistons (24b) and (25b) to the protruding side, and the traveling wheels 114 and αG are moved downward.

Also, if the tiller changes from side to side and the left side becomes shallower or deeper, or even if the right side becomes shallower or deeper, the left ground float 0η・(
78) The left and right hydraulic switching valves (9) and αG are independently switched by the right ground float (@- (79)) in the same way as above, so the aircraft does not tilt to the left or right. The running wheels 0 tatami α$ will be controlled up and down.

Therefore, 1. It is possible to carry out reliable seedling planting work without causing the aircraft to tilt to the left or right, and without causing fluctuations in slippage, thereby preventing variations in seedling planting depth and between plants. can.

Next, when adjusting the seedling planting depth, move the rear pivot positions of the posteromedial grounding float (80) and the posterolateral grounding floats (78) and (79) up and down to level the seedling planting position. It's a good idea to change it. To do this, rotate the adjustment lever (87), rotate the side [82], and use the arm (83) to rotate the pin (84).
) should be moved downwards when planting shallowly and upwards when planting deeply.

At this time, along with this operation, the front side grounding float CI
The rear pivot position of I) and (to) is also connected to the interlocking wire (89),
They will be operated in the same direction via the balance arm (b).

Therefore, the hydraulic pressure switching valve (9) and α0 can be controlled to always maintain an accurate predetermined state without fluctuations in the state. That is, when this interlocking wire (89) is not present, by raising and lowering the rear portions of the grounding floats (31), (79), and (80), the front grounding float G1J
- (to) ground pressure fluctuation occurs, and the hydraulic switching valve (9)
This solves the problem that the control sensitivity of α0 changes and makes it impossible to accurately detect the ground pressure.

In the above embodiment, the pins (44) and (45) and the interlocking pipes (to) and (32
) constitutes a floating part, and the hydraulic switching valves (9) and aO are forcibly switched only when the ground float (b) and ni) move upward, and when the ground float moves downward, the springs (73) and (74) Can be switched. For this purpose, the hydraulic switching valve (9) and α0 are connected to the pistons (24b) and (25b) using the hydraulic switching operation lever (66), etc.
When trying to switch to the protruding side, the ground float 8
1)・(to) can be done without lifting the operation lever (
66) becomes very easy to operate. At this time, the rear outer grounding float (78), (79) and hydraulic switching valve (9)
・It becomes even easier when α0 is left in an unswitched state. To disable this switching, press Natsu (119)
The movement of the ground floats (78) and (79) moves the rod (111) and (115) forward and backward.
)・(112).

In addition, by adjusting these nuts (119) to (115), the hydraulic pressure switching valve control from the rear outer grounding foot (78) and (79) can be changed from the inner side grounding foot 0υ (to) side. The control force can be changed to strong or weak.

This kind of adjustment depends on the leveling condition of the soil surface in the field.

The size of the bottle can be changed depending on the soil quality, etc., and precise control can be performed.

In response to this, the hydraulic switching valve is switched by the vertical movement of both the front inner ground contact float and the rear inner ground contact float, and the vertical control of the traveling wheels is performed to prevent the aircraft from being propelled by leaning to the left or right. , each ground float receives the appropriate ground pressure for the work, and stable work is carried out.
When adjusting the working depth (working depth, planting depth, seeding depth, etc.) using a working machine, the adjustment can be made reliably without causing large fluctuations in the operating status of the hydraulic switching valve of the front inside grounding float and the rear inside grounding float. It has the effect of making it possible to perform the work.

[Brief explanation of drawings]

The figures show a rice transplanter which is an embodiment of the present invention. Fig. 1 is a side view, Fig. 2 is a side view of the main parts, Fig. 3 is a plan view of the main parts, and Fig. 4 is a side view of the rice transplanter. 5 is a simplified side view of the main parts, FIG. 5 is a simplified plan view of the main parts, and FIG. 6 is a hydraulic circuit diagram for explaining hydraulic control. Symbols in the figure: (9) and αG are hydraulic switching valves, a4 and αQ are single running wheels, αη is the control handle, (to) and (to) are hydraulic cylinder devices, 0η and ■ are front-inside grounding floats, (7
8) and (79) indicate the posterolateral grounding float, and (80) indicates the posteromedial grounding float.

Claims (1)

[Claims] Hydraulic cylinder device (24
) and (25), the running wheels (14) and (15) are moved up and down.
) is equipped with a rice field work machine such as a rice transplanter or sowing machine, and a walking-type agricultural machine is equipped with a control handle (17) at the rear. ), (32), a pair of left and right rear outer grounding floats (78) and (79), and a single rear inner grounding float (80) can be adjusted up and down in conjunction with the rear side relative to the vehicle body. The front part of each grounding float is freely movable up and down, and the front inner grounding float (31) and the rear outer grounding float (78), which are located on the left side with respect to the left-right center of the vehicle body, jointly move the left running wheel. The operating hydraulic pressure switching valve (9) of the hydraulic cylinder device (24) that operates (14) is switched, and the right traveling wheel is The ground pressure of each of the left and right ground floats (31), (32), (78), and (79) is adjusted by switching the operating hydraulic pressure switching valve (10) of the hydraulic cylinder device (25) that operates (15). An agricultural machine for paddy fields that is held so that no fluctuation occurs in the front and back.