JPH0797929B2 - Rolling control device for paddy farm machinery - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rolling control device for a paddy farm work machine such as a rice transplanter or a submerged seeder.

[Prior art]

As a conventional technique of this type, as disclosed in Japanese Utility Model Publication No. 53-29627 and Japanese Utility Model Publication No. 54-22681, the left and right floats are prosperous with a balance rod, and a switching valve of a hydraulic system is provided at the balance fulcrum. There is a rolling control device for rice transplanters.

[Problems to be Solved by the Invention]

In the conventional technology disclosed in Japanese Utility Model Publication No. 53-29627 and Japanese Utility Model Publication No. 54-22681, since the left and right floats are connected by a balance rod that swings up and down, the linkage mechanism requires a large space. It is necessary, and as shown in the figure of the publication, the balance rod must be provided at a lower position of the machine body, which not only complicates the machine body structure but also causes the balance bar to be caught by foreign matter during traveling and damaged. There are drawbacks.

Also, since there is no mechanism for adjusting the switching timing of the hydraulic switching valve with respect to the vertical movement of the float, the control cannot be performed accurately due to manufacturing errors or assembly errors of each member, and proper work cannot be performed. Met.

[Means for solving the problem]

In order to solve the conventional problems, the present invention provides left and right side floats 19a and 19b on the left and right outer sides of left and right wheels 4 and 4 which are vertically movable on the left and right sides of the machine body, and the left and right side floats 19a and 19b. Hydraulic switching valve by moving up and down
11b is switched to operate the tilt correction hydraulic cylinder device 17 to change the left and right relative heights of the left and right wheels 4 and 4 to correct the left and right tilts of the machine body. Left and right shafts 29, 29 provided in the left and right direction from the inside to the outside of the left and right wheels 4, 4 are rotatably provided, and the outer ends of the left and right shafts 29, 29 and the left and right side floats 19a, 19b are respectively provided. The left and right side floats 19a and 29b are linked to each other by linking the inner ends of the left and right shafts 29 and 29 and the hydraulic switching valve 11b.
A hydraulic pressure switching valve 11b is switched by vertical movement of 19b, and a hydraulic switching valve 11b is switched by vertical movement of the left and right side floats 19a and 19b in the switching linkage mechanism. A rolling control device for a paddy field agricultural working machine characterized in that an adjusting device 30 for adjusting the timing is provided.

[Advantageous effects of the invention]

According to the present invention, the left and right shafts 29, 29 provided in the left and right direction so as to reach from the inside to the outside of each of the left and right wheels 4, 4 in a front view of the machine body are rotatably provided, and the outer end portions of the left and right shafts 29, 29 are provided. The left and right side floats 19a and 19b are linked to each other, and the inner ends of the left and right shafts 29 and 29 are linked to the hydraulic pressure switching valve 11b to link the left and right side floats 19a.
・ Since the switching linkage mechanism that can switch the hydraulic switching valve 11b by vertically moving 19b is configured, the switching linkage mechanism can be compactly arranged with a simple structure, and the switching linkage mechanism can be set to foreign matter when traveling as in the conventional example. It also reduces the chance of being damaged by being caught.

In addition, the left and right side floats 19a and 19b are installed in the switching linkage mechanism.
Since the adjusting device 30 for adjusting the timing at which the hydraulic pressure switching valve 11b is switched by each up and down movement is provided, even if a manufacturing error or an assembly error occurs in each member, the left and right side floats 19a are adjusted by the adjusting device 30. The timing at which the hydraulic pressure switching valve 11b is switched can be properly adjusted by the upward and downward movements of 19b, and the control can be accurately performed to perform appropriate work.

〔Example〕

A walk-behind rice transplanter according to an embodiment of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes a mission case, the base portion of which is integrally attached to the output shaft side of the engine 2, and which is provided in an L shape so that the main body portion of the mission is located at a lower rear position of the engine 2 when seen in a plan view. The cover cylinders 1a, 1a covering the drive shaft are protruding.

Reference numeral 3-3 is a swing case, the base side of which is rotatably pivotally attached to the cover cylinders 1a and 1a, and the tip end thereof is extended rearward. 4.
Reference numeral 4 denotes a propelling wheel, which is pivotally mounted on the outer side of the tip end side of the swing case 3 and can swing while being transmitted from the mission case side.

Reference numeral 5 denotes a frame, the front end of which is fixed to the mission case 1, extends rearward, and is then bent so as to face upward and rearward. The frame 5 is formed of a hollow pipe having a square shape or a circular shape. Reference numeral 6 denotes a steering handlebar having a U-shape in plan view, and the left and right intermediate portions are fixed to the upper end of the frame.

Reference numeral 7 denotes a planting transmission case, which is formed with a front gate-shaped fixing portion 7a in which lower portions of the left and right central portions are fitted into the frame 5 from above and a planting instrument transmission case portion 7b for mounting the central seedling planting instruments 57a and 57b. The central vertical planting case 7c is provided rearward and upward from the planting tool transmission case portion 7b, and the upper case 7d for mounting the planting portion drive shaft is provided at the upper end of the case 7c. An integral bearing metal 7e is provided, and a bearing metal 7f that can be separated from this is provided on the other side, a cylindrical body 7g is interposed between the left and right bearing metals 7e and 7f, and both left and right sides of the upper case 7d are provided. Is provided with thin cylindrical horizontal overhanging cases 7h, 7h extending to the left and right sides, and lateral vertical planting cases 7i, 7i extending forward and downward are provided on the tip side. still,
The right side overhanging case 7h is integrated with the bearing metal 7f and can be removed from the upper case 7d.

And, the swinging arm pivotal support portion (a) extending to the lower side is attached to the side part vertical planting case 7i, 7i for mounting the side part seedling planting tool 57c.
And the float support part (b) that supports the float support rotation shaft that is swung backward and upward are integrally formed, and this case 7i, 7i is provided with a lid on the upper end side, from which the chain transmission assembly is performed. It can be assembled by transmission by inserting members.

8 is a seedling table, left and right side frames 8a, 8a, partition frames 8b, 8b and bottom plate
8c and 4 seedlings with a nursery bed that are rectangular in plan view are arranged side by side in a row, and a belt for intermittently transferring the placed seedlings is provided on the bottom plate on the front end side of each placing part. It is stretched. Then, the seedling mounting table 8 is attached to each of the vertical planted cases 7c.
The tip end side is arranged between the 7i and 7i sides and the frame 5 extending upward and rearward so that the tip side is lower, and the tip end side of this seedling placing table 8 receives the front end of the seedling to be placed and its bottom surface. The seedling receiving frame 9 is attached to an adjusting frame which can be adjusted in the forward and backward directions by a lever 10 provided on the frame 5 side.

The rear surface of the rear side of the seedling mounting table 8 is supported by the handle 6 by a support rail, and the seedling mounting table 8 is actuated by a left and right reciprocating mechanism in the cylindrical body 7g so as to be able to reciprocate laterally left and right. The distal end side of the moving shaft is linked with a connecting member.

11 is a hydraulic switching valve case, the mission case 1
This valve case is integrally attached to the upper part of
An upper and lower hydraulic cylinder device 12 for simultaneously raising and lowering a pair of left and right wheels 4 and 4 is integrally provided on 11. A horizontal rod 14 is provided at the tip of the piston 12a of the upper and lower hydraulic cylinder device 12 in a projecting direction of the piston by a spring 13, and the left and right ends of the horizontal rod 14 and the left and right swing cases 3 and 3 are provided. Are connected to the rods 15 and 15 and the swing case side by integral projection arms 16 and 16. Then, an inclination correcting hydraulic cylinder device 17 for independently raising and lowering the wheels 4 on the one side is provided in the rod 15 on the one side.

Reference numeral 18 denotes a center float, which is disposed between the left and right wheels and extends in the lower front and rear of the frame 5. 19a
19b is a side float, which is located outside the left and right wheels and has a front end that extends to the vicinity of the base ends of the left and right swing cases 3 and a rear end that is approximately the same length as the rear end of the center float 18. There is. And each of these floats 18 ・ 19
The rear side of a / 19b is an arm 21 integrated with a float support rotation shaft 20 rotatably provided at the rear end of the float support portion (b) integrated with the side vertical planting case 7i / 7i. The front part of the bracket is attached to the bracket via a pin so that the front part can be rotated up and down. Reference numeral 22 is a lever for adjusting the planting depth for rotating and adjusting the rotating shaft 20. Reference numeral 23 is a link provided with an absorber mechanism, and the front portion of the center float 18 is attached to a projection rod 24 fixed to the mission case 1.

Reference numeral 25 denotes a rod, which links the control switching valve 11a of the vertical hydraulic cylinder device 12 and the center float 18, and when the float 18 comes too close to the body side from a predetermined vertical range, the piston 12a is projected and the wheel 4・ 4 is lowered at the same time, and conversely, if they are too far apart, the piston 12a retracts so that the wheels 4 and 4 rise together.

26, 26 is a bearing metal, and in the illustrated example, a pipe 26b is integrally attached to a mounting seat plate 26a so that the base end side of the pipe 26b slightly projects from the seat plate.
26 is fixed to the side surface of the mission case 1. The structure of the fixing place and the mounting portion is as shown in FIG. 3, and the side of the mission case 1 is protruded from the rear side to the front side at the portion of the swing case 3 which is separated from the outer periphery of the base end to the front side. A protrusion 1b whose side is cut by a predetermined width is provided, and a seat plate 26a is fixed to the end surface of the protrusion 1b with a bolt. And before this fixation, the shaft with the arm 28
29 is rotatably inserted in the pipe 26b. Also this axis 29
Is provided so as to project from the end of the pipe, and the shaft end side has a part of the outer peripheral surface cut (c) to the shaft end side, and the interlocking metal fitting 31 provided with the adjusting device 30 has the shaft 29. It is provided so that it can be inserted and rotated together.

32 is a side float attachment link, made of resin or aluminum alloy, the base side of which is rotatably provided through the shaft 29, and the tip side of which is the side float 19a.
A long hole (d) is provided through which a pin 34 attached to a bracket 33 fixed to 9b is inserted to be movable back and forth. The base end side of the link 32 is notched in the left and right middle, and the interlocking metal fitting 31 is fitted into this portion and inserted into the shaft 29 as it is, and the tip side is pinned to the side float with a pin 34.
The side floats 19a and 19b can be freely moved up and down. Further, when the floats 19a and 19b move upward and the link 32 rotates upward around the shaft 29 at the tip of the adjustment device 30, the shaft 29 is rotated only when the upper surface of the link comes into contact. Has become.

Reference numeral 35 is a balance rod, which has a left and right center portion mounted on a shaft 36 which is rotatably supported by the hydraulic pressure switching valve case 11 and which is integrally mounted on the left and right sides of the balance rod 35 and the left and right shafts 29.
28 and 28 are linked by a rod 38 with a compression spring 37 interposed.

39 is a switching valve for controlling the inclination correcting hydraulic cylinder device 17
A lever for pushing and pulling the switching spool 40 of 11b for switching, and the base end side of this lever 39 is fixed to the shaft 36,
The switching valve 11b is configured to be switched by rotating together with the balance rod 35. That is, when the body tilts to the left, the balance rod 35 is tilted to the left by the left side float 19a, the spool 40 is pushed in, and the switching valve 11b is switched to project the piston 17a of the tilt correction hydraulic cylinder device 17, and the left wheel It is configured to descend 4 to make the body.

The left and right side float mounting links 32, the left and right adjusting device 30, the left and right shafts 29, the left and right arms 28, the left and right rods 38 with the compression springs 37, the balance rod 35, the shaft 36, and the lever 39, the left and right side floats 19a. A switching linkage mechanism that switches the hydraulic pressure switching valve 11b by the vertical movement of 19b is configured.

In the figure, 41 is a machine cover, 42 is a preliminary seedling mounting base, and 43 is a hydraulic pump.

Next, the operation of the above example will be described.

After the seedlings are mounted on the seedling mounting base 8 and the spare seedling mounting base 42, the engine 2 drives each part to start the rice planting work.

When the left and right wheels 4, 4 are transmitted and rotated by contacting the cultivator,
The center float 18 and the side floats 19a and 19b are grounded and propelled on the surface soil surface of the paddy field, and the front portions of these float up and down depending on the depth of the tiller with which the wheels 4 and 4 abut.

During such propulsion, each seedling planting tool 57a / 57b divides the seedling from the left and right reciprocating seedling mounting table 8 and successively plants it on the surface soil surface of the paddy field cultivated by the center float 18, 19a, 19b. .

During such a rice planting operation, when the height of the cultivator does not fluctuate to the left and right but fluctuates to the front and back, the vertical movement of the front part of the center float 18 switches the control of the vertical hydraulic cylinder device 12. The valve 11a is switched and the pair of left and right wheels 4 and 4 are simultaneously moved up and down to control the body to a substantially constant height above the surface soil of the paddy field.

Also, if the cultivator is changing between the left and right sides, the body tilts, and the side float on only one side is pushed up above a certain level. Then, the link 32 is pushed up to rotate around the shaft 29, abut on the tip of the adjusting device 30 attached to the metal fitting 31 fixed to the shaft 29, and rotate the shaft 29 to be integrated with the shaft 29. The arm (28) moves the rod (38) upward, and the balance (35) is swung through the spring (37). Then, the lever 39 integrated with the balance rod 35 actuates the spool 40 of the switching valve 11b to actuate the tilt correction hydraulic cylinder device 17 to restore the horizontal tilt of the machine body.

In this way, the height of the airframe is always within a certain range from the surface soil surface of the paddy field, and it is prevented from inclining greatly to the left and right sides.
The planting depth is controlled to be kept constant.

Then, the shaft 29 in the linkage mechanism for switching the switching valve 11b from the side floats 19a and 19b as the tilt detectors of the rolling control for correcting the tilting of the body to the left and right is projected from the mission case 1 to the left and right. Since it is supported by metal 26, its configuration is extremely simple, and swing case 3
・ 3 does not get in the way.

Further, since the adjusting device 30 of the switching valve 11b is interposed in the middle of connecting the shaft 29 and the front portions of the side floats 19a and 19b, the upper moving position of the floats 19a and 19b and the switching valve in front of the wheels 4 and 4.
The relationship between the switching position of 11b and the switching position can be accurately adjusted while operating the floats 19a and 19b.

And, in particular, the left and right shafts 29, 29 provided in the left and right direction so as to reach from the inside to the outside of each of the left and right wheels 4, 4 in a front view of the machine body are rotatably provided, and the outer end portions of the left and right shafts 29, 29 are provided. The left and right side floats 19a and 19b are linked to each other, and the inner end portions of the left and right shafts 29 and 29 are linked to the hydraulic pressure switching valve 11b to link the left and right side floats 1 and
Since the switching linkage mechanism in which the hydraulic switching valve 11b is switched by moving the 9a and 19b in the vertical direction is configured, the switching linkage mechanism can be compactly arranged with a simple configuration, and failures can be reduced.

In addition, the left and right side floats 19a and 19b are installed in the switching linkage mechanism.
Since the adjusting device 30 for adjusting the timing at which the hydraulic pressure switching valve 11b is switched by each up and down movement is provided, even if a manufacturing error or an assembly error occurs in each member, the left and right side floats 19a are adjusted by the adjusting device 30. The timing at which the hydraulic pressure switching valve 11b is switched can be appropriately adjusted by the upward and downward movements of 19b, and the control can be accurately performed to perform proper rice planting work.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of a main part, FIG. 2 is a plan view of the same, FIG. 3 is a plan sectional view of the main part, and FIG. FIG. 5 is a plan view with a part thereof omitted, and FIG. 6 is a perspective view of an essential part. In the figure, reference numerals 4 and 4 are left and right wheels, 11b is a hydraulic switching valve, 1
7 is a tilt correction hydraulic cylinder device, 19a and 19b are left and right side floats, 29 and 29 are left and right shafts, and 30 is an adjusting device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Hitoshi Yamazaki, No. 1 Yakura, Tobe, Iyo-gun, Ehime Prefecture, Engineering Department, Iseki Agricultural Machinery Co., Ltd. Company Engineering Department (72) Inventor Seike Rihe 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Koriyama Jun

Claims (1)

[Claims] 1. Left and right side floats 19a, 19b are provided on the left and right outer sides of left and right wheels 4, 4 which are vertically movable on the left and right sides of the machine body, and hydraulic pressure is applied by vertical movement of the left and right side floats 19a, 19b. In the rolling control device of the paddy agricultural work machine, which switches the switching valve 11b to operate the tilt correction hydraulic cylinder device 17 to change the left and right relative heights of the left and right wheels 4, 4 to correct the left and right tilt of the machine, The right and left shafts 29, 29 provided in the left and right direction from the inside to the outside of the left and right wheels 4, 4 are rotatably provided, and the outer ends of the left and right shafts 29, 29 and the left and right side floats 19a, 19b are Respectively, and the inner ends of the left and right shafts 29, 29 and the hydraulic switching valve 11b are linked,
A hydraulic pressure switching valve 11b is switched by the vertical movement of the left and right side floats 19a and 19b, and a switching linkage mechanism is formed, and the left and right side floats 19a and 1b are provided in the switching linkage mechanism.
A rolling control device for a paddy farming machine, which is provided with an adjusting device 30 for adjusting the timing at which the hydraulic pressure switching valve 11b is switched by each upward and downward movement of 9b.