JPH0617422U - Riding rice transplanter - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the seedling mat from collapsing when adding the seedling mat to the seedling mounting table 15 of the seedling planting apparatus that has been raised so as to approach the spare seedling table on the traveling body side. [Structure] The auxiliary seedling stand 28 on the traveling machine side is rotated to approach the seedling stand 15 so as to be parallel thereto, and the hydraulic cylinder 13 is operated to raise the seedling planting device 10 to raise the seedling stand 15 The upper end of the plant should approach the preliminary seedling stand 28. Furthermore, the actuator 62 is operated to control the forward tilting angle of the seedling mounting table 15 so that the seedling mounting table 15 approaches the horizontal position, so that the seedling mat can be smoothly transferred from the spare seedling mounting table 28. Also, make sure that the seedling mat does not collapse.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a riding-type rice transplanter equipped with a spare seedling stand on a traveling body.

[0002]

[Prior art]

 Conventionally, when planting seedlings in a field with a riding type rice transplanter, a seedling planting device is attached to the rear part of the traveling machine so as to be able to move up and down through a link mechanism, and the lower part of the seedling planting device is mounted in the left and right direction of movement. A planting mechanism is installed at appropriate intervals in the field, and the planting mechanism that rotates up and down as the rice planting machine progresses divides the seedling mats on the slanted seedling table in the seedling planting device into appropriate number of plants. It is disclosed in, for example, Japanese Utility Model Publication No. 62-30893, which is a prior art, that it is configured to be planted on a surface and that the traveling machine body is provided with a spare seedling stand on which a large number of spare seedling mats are placed. .

In this prior art, when the seedling planting device is raised, the seedling mat supply port in the spare seedling stand and the seedling mat receiving port at the upper end of the seedling stand in the seedling planting device are close to each other. Is disclosed.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned prior art, since the upper end of the seedling placing table approaches the seedling mat supply port of the spare seedling stand only by raising and lowering the seedling planting device, the link for raising and lowering the seedling planting equipment is provided. The geometrical relations such as the dimensions and attachment points of the mechanism and the height of the link mechanism are unambiguously determined.

In addition, in this kind of seedling planting device, the pitch of the seedling planting device is kept constant in order to keep the seedling planting posture constant during the planting work regardless of the vertical height change of the seedling planting device with respect to the traveling machine body. Since the link mechanism often uses a parallel link mechanism to prevent the posture of the seedlings from changing, the tilted posture of the seedling stand does not change when the seedling planting apparatus is raised toward the preliminary seedling stand. However, even if the upper end of the seedling mounting table is brought close to the spare seedling mounting table, the seedling mat is supplied to the steeply inclined seedling mounting table at the time of seedling splicing, and the seedling mat sliding down the upper surface of the seedling mounting table is There was a problem that the impact when stopping at the lower end of the seedling stand became large and the seedling mat collapsed.

Therefore, the present invention aims at pursuing the convenience in this kind of seedling splicing work and efficiently performing seedling planting work by preventing the seedling mat to be replenished from collapsing.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention connects a seedling planting device to a rear part of a traveling machine equipped with a control seat so as to be able to move up and down through a hydraulic actuator. The seedling placing table is arranged in an inclined manner so that the upper end of the seedling placing table is located toward the upper side, and the spare seedling placing table provided on the traveling machine is rotatably provided so as to approach the upper end of the seedling placing table at least during the seedling joining work. In such a riding type rice transplanter, during seedling splicing work, the seedling planting device is controlled so as to be raised so that its seedling mounting table is approximately at the same height as the spare seedling table, while driving means provided in the seedling planting device. In the above, the control means is provided so as to change the inclination angle of the seedling mounting table in a decreasing direction so that the upper end of the seedling mounting table approaches the spare seedling mounting table.

[0008]

[Operation and effect of the device]

 With this configuration, during the seedling splicing work, the spare seedling stand is rotated so as to approach the upper end of the seedling stand, while the seedling planting device is set so that the seedling stand is at approximately the same height as the spare seedling stand. To raise. At that time, the drive means provided in the seedling planting device controls the inclination angle of the seedling mounting table to decrease so that the upper end of the seedling mounting table approaches the spare seedling mounting table. Since the heights of the seedling mounting table and the seedling mounting table are substantially the same, it is easy to transfer the seedling mat on the spare seedling mounting table to the seedling mounting table, and the seedling mats mounted on the seedling mounting table rapidly change to the seedling mounting table. Since it does not slide down toward the lower end, the seedling mat can be prevented from collapsing.

Therefore, according to the present invention, seedling splicing work is extremely convenient, and the seedling planting work can be efficiently performed by preventing the seedling mat to be added from collapsing.

[0010]

【Example】

 An example applied to a 6-row Ueda transplanter will be described below. In the figure, 1 indicates a traveling machine body, and the traveling machine body 1 is attached to a vehicle body frame 2 and front wheels 3, 3 attached to the front side thereof and a rear side thereof. It is composed of rear wheels 5 and 5 mounted on the body frame 2, and a control seat 6 and a steering handle 7 are provided on the upper surface of the body frame 2, and the driving force of the engine 8 on the upper front surface of the body frame 2 is changed in the transmission case 9. This is a configuration in which the rear wheel 5 is driven via a mechanism.

The seedling planting device 10 mounted on the rear portion of the traveling machine body 1 via a parallel link mechanism 11 so as to be vertically movable includes a central transmission case 12 and a transmission shaft on the left and right sides of the central transmission case 12. It consists of planted transmission cases 14, 14 that are attached at appropriate intervals via inserted connecting pipes, and a laterally reciprocally movable seedling table 15 that is inclined so that the upper end approaches the rear part of the traveling machine body. On the left and right sides of the rear part of the both-transplantation transmission cases 14, a planting mechanism 16 for raising and lowering planting claws is provided between the seedling take-out port at the lower end of the seedling platform 15 and the field scene 17.

Further, the parallel link mechanism 11 is largely moved up and down by a hydraulic cylinder 13 as a hydraulic actuator that attaches to the traveling machine body 1 side. As shown in FIG. 3, the parallel link mechanism 11 is composed of a top link 18 and a pair of left and right lower links 19, 19 and the base end of the top link 18 is pinned to a portal frame standing on the vehicle body frame 2. The gate-shaped support 11a, which is attached to each of the top links 18 and the lower links 19 and 19 and is attached to the seedling planting device 10 via the rolling shaft 60 of the hitch, is rotatable left and right. The planting device 10 has a traveling body centered on the rolling shaft 60 so that the floats 20, 20, 20 arranged on the lower surface sides of the central transmission case 12 and the planted transmission cases 14, 14 can slide in a field scene. It is a structure that can be vertically rotated (rolled) to the left and right of 1.

The rails 23 at the lower end of the rear surface of the seedling mounting table 15 are slidably fitted to the guide portions 22 projecting from the left and right transmission cases 14 and 14, while the rear upper portion of the rear surface of the seedling mounting table 15 is covered. The guide rails 24 are slidably fitted on the rollers at the upper ends of a pair of left and right columns 25, 25 protruding from the left and right both transmission cases 14, 14. As shown in FIG. 3, the portal 11a and the seedling planting device 10 are rotatably connected to each other via a horizontal pivot shaft 61 so as to allow pitching and rotation. When the piston rod of the actuator 62 such as a hydraulic cylinder as a driving means mounted between the top link 18 and the gate-shaped support 11a in the parallel link mechanism 11 is contracted, the seedling planting centering on the lateral pivot shaft 61. The device 10 and thus the seedling mount 15 can be rotated so that its forward tilt angle is reduced.

A seedling mat 26 obtained by germinating and growing paddy sown on the soil in a seedling raising box (not shown) is taken out from the seedling raising box and placed on the flat plate-like seedling taking plate 27 shown in FIG. Is supplied. As shown in FIGS. 1 and 2, the seedling mat 26 with the seedling take-up plate 27 brought to the edge of the running body 1 has a longitudinal direction perpendicular to the traveling direction of the running body 1, as shown in FIGS. It is mounted on the spare seedling stands 28, 28 arranged on both the left and right sides of the.

Each preliminary seedling stand 28 is composed of a front fixed stand 30 attached to a fixed stand 29 and a turning stand 32 attached to a horizontally rotatable stand 31. Each turning stand 32 is seen in a plan view. 2, it is arranged between the rear end of the front fixing base 30 and the upper end of the seedling mounting base 15. The upper and lower intermediate portions of the guide cylinder 33 fitted on the support column 31 are supported on the side surface of the traveling machine body 1 via a bracket 34. The gearbox 35 at the lower end of the column 31 has a built-in drive motor 37 and a transmission gear mechanism 36 capable of rotating in the forward and reverse directions, and the column 31 is rotated 90 degrees horizontally in the directions of arrow A and arrow B in FIGS. 2 and 6. When the rotary table 32 is rotated to the state shown by the alternate long and short dash line in FIG. 2, the seedling mats 26 placed on the rotary tables 32 are moved in the longitudinal direction. It becomes almost along the longitudinal direction of.

As shown in FIGS. 5 and 6, a protrusion 39 is fixed to the lower end of the rotating column 31 in the gear box 35 so that the rotating column 31 can rotate integrally. The rotation support column 31 rotates forward and backward by an angle 90 between the first limit switch 70 and the second limit switch 71 which are arranged in the box 35 with the central angle appropriately separated. Further, a tilt switch 75 for the actuator 62 for changing the tilt angle of the seedling stand 15 is arranged between the first limit switch 70 and the second limit switch 71.

The spare seedling stand rotation switch 38 for operating the rotation base 32 is located on the side surface of the rotation base 32 and on the side near the side of the control seat 6 (inside the traveling machine body 1). Set up (see Figures 2 and 6). FIG. 9 shows a rotary drive circuit for the rotary table 32 and the seedling table 15, and the spare seedling table rotary switch 38 is provided with a contact point T on the seedling splicing side and a contact point U on the planting side. Input to an electronic controller 72 such as a microcomputer, and connected to the drive motor 37 from the controller 72 via the relay circuit (drive circuit) 73 via the first limit switch 70 and the second limit switch 71. Has been. The first limit switch 70 and the second limit switch 71 are OFF when the protruding piece 39 is in contact, and are ON when separated. In this embodiment, since the turning bases 32 are arranged on both the left and right sides of the traveling machine body 1, the turning columns 31 and the gear boxes 35 are provided as a pair of left and right.

Input from the automatic switch 74 for controlling the pitching of the seedling planting device 10 to the controller 72 via the forward tilt switch 75, and the controller 72 is connected to the actuator 62 via the relay circuit (driving circuit) 76. ing. With the manual pitching switch 77 that is input to the controller 72, the actuator 62 is actuated in such a direction that the tilt angle of the seedling mounting table 15 decreases when it is inserted into the forward tilt side contact S, and when it enters into the backward tilt side contact K, the seedling mount 15 of the seedling mounting table 15 is moved. The actuator 62 is operated in the direction in which the tilt angle increases.

On the other hand, the raising / lowering operation of the seedling planting device 10 has the following configuration. That is, the power from the engine 8 is transmitted to the transmission mechanism in the transmission case 9 via the belt-type main clutch 40 in FIG. 7 to drive the rear wheels 5, and via the PTO shaft (not shown). And transmitted to the seedling planting device 10. The main gear shift lever 41 in FIG. 7 is rotated to rotate the arm 45 attached to the operation shaft 44 of the transmission case 9 via the link 43 together with the interlocking shaft 42, and H (high speed), L (low speed), It can be switched to N (neutral position and seedling joint position). Since the dedent mechanism 47 is released when the foot petal 46 is depressed, the main gear shift lever 41 is rotated to the L (low speed) and N (neutral) sides by the force of the spring 48, while the wire 49 disengages the main clutch 40.

Reference numeral 51 shown in FIG. 8 is a hydraulic operation lever that operates the hydraulic cylinder 13 to raise and lower the seedling planting device 10. When the leftward rotation in FIG. The planting device 10 is raised by descending to the seedling working position where it is grounded and rotating to the right in FIG. With this configuration, when the seedling splicing sensor 66 (see FIG. 9) arranged on the seedling mat mounting portion 15a of the seedling mounting table 15 detects that the seedling mat has been consumed and shortened during seedling planting work, The operator rotates the main transmission lever 41 to the neutral position or the seedling joint position. As a result, the interlocking shaft 42 is rotated in the direction of arrow C in FIG. 8, and the hydraulic operating lever 51 is directed from the lowered position in FIG. 8 to the raised position beyond N (the neutral position) via the pressing lever 50. To force it to rotate. At this time, the rotating arm 52 is pushed up by the auxiliary arm 53 that rotates integrally with the pressing lever 50, and the trochanter 54 fixed to the rotating arm 52 is fixed to the hydraulic operating lever 51. The hydraulic operation lever 51 is held at a predetermined raised position by being disengaged from the engaging groove.

On the other hand, in order to horizontally rotate the rotary base 32 of the preliminary seedling stand 28, when the automatic switch 74 is turned on and the preliminary seedling stand rotation switch 38 is connected to the contact T, the drive motor 37 is driven. Rotates in the forward direction to rotate the turntable 32 in the direction of arrow A. When the turntable 32 turns 90 degrees, the drive motor 37 is stopped when the relay circuit 73 is turned off by the first limit switch 70 or when the switch 38 is turned off, so the turntable 32 is turned at that position. The pillars 31 are stopped, and the turntables 32 are arranged in a left-right longitudinal shape so as to face the seedling placement table 15 (see the state indicated by the alternate long and short dash line in FIG. 2), and the seedling mat 26 placed on each turntable 32 in the longitudinal direction. Become substantially along the longitudinal direction of the seedling mat mounting portion 15a of the seedling mounting table 15. When the forward tilt switch 75 is turned on by contacting the projection piece 39 during the rotation of the rotary base 32, the actuator 62 is operated via the relay circuit 76, and the tilt angle of the seedling mounting base 15 is reduced. Turn to. As described above, during the seedling splicing work, the operator operates the hydraulic cylinder 13 to move the seedling planting device 10 upward, so that the upper end of the seedling mounting table 15 is substantially the same as the preliminary seedling table 28. When the height rises to the height, this is detected by a sensor 56 provided at the rear end of the preliminary seedling stand 28, and an actuator 57 such as a hydraulic cylinder attached to the hydraulic operation lever 51 is operated. As a result, the hydraulic operation lever 51 automatically returns to N (neutral position), so that the raising of the seedling planting device 10 is stopped (see the state indicated by the alternate long and short dash line in FIG. 8). In this state, the actuator 57 is returned to the free state (non-operating state).

In this state, the worker can carry out the seedling splicing work by dropping the seedling mat 26 from the spare seedling stand 28 from the upper end of the seedling stand 15. As described above, the heights of the preliminary seedling stand 28 and the upper end of the seedling stand in the seedling planting apparatus 10 are substantially the same, and the two are close to each other, and the inclination angle of the seedling stand 15 is close to horizontal. Since the seedling mat 26 is reduced in number, the work of moving the seedling mat 26 from the spare seedling stand 28 to the seedling stand 15 can be carried out smoothly, and the seedling mat 26 does not slide down suddenly and there is no inconvenience such as collapse.

When the seedling joining work is completed, the hydraulic operation lever 51 may be returned to the lowered position and the seedling planting work may be restarted. When driving on the road, the seedling planting device 10 is raised to a position higher than the seedling joining work position. In that case, the sensor 56 is switched to the inoperative state and the hydraulic operation lever 51 is turned to the raised position. Move. Then, when it rises to a predetermined height, the wire 58 connected to the parallel link mechanism 11 and the hydraulic operation lever 51 pulls to return the hydraulic operation lever 51 to the neutral position.

When the seedling splicing work is completed, the spare seedling stand rotation switch 38 is connected to the contact U, the relay circuit 76 is operated via the controller 72, the drive motor 37 is rotated in the reverse direction, and the rotation base 32 is moved. Rotate in the direction of arrow B. When the rotary base 32 is rotated 90 degrees in the same manner as described above, the drive motor 37 is stopped when the relay circuit 73 is turned off by the first limit switch 70 or the switch 38 is turned off. 32 is oriented along the longitudinal direction of the traveling machine body 1.

The spare seedling stand rotation switch 38 may be provided on the traveling machine body 1 between the inner surface of the rotation base 32 and the control seat 6. In this way, the spare seedling stand turning switch 38 is provided on the side surface of the turning table 32 and on the side close to the lateral side of the control seat 6 (inside the traveling machine body 1) or inside the turning table 32. If it is provided on the traveling body 1 between the side surface and the control seat 6, the spare seedling stand rotation switch 38 will be located at a position where it does not interfere with the operation when the rotation base 32 rotates. The operator can easily perform the seedling splicing work and the work of starting and stopping the rotation of the turntable 32.

As shown in FIG. 10, the contacts of the spare seedling stand rotation switch 38 are set to R contacts (right contacts), L contacts (left contacts), and CO contacts (both simultaneous contacts). , When put in the R contact, only the right turntable 32 can be turned, when put in the L contact, only the left turntable 32 can be turned, and when put in the CO contact, the left and right turntable 32 can be turned. , 32 may be controlled by the controller 72 so as to operate the drive motors 37, 37 so that they can rotate simultaneously.

Further, if the first limit switch 70 and the second limit switch 71 for restricting the rotation of the left and right rotating bases 32, 32 are arranged with respect to the respective rotating columns 31, 31, the respective rotations can be changed. Even if the rotation timings of the bases 32, 32 are deviated, each rotary base 32 is accurately rotated to a predetermined position (a position along the traveling direction of the traveling machine body 1 and a position along the left-right direction of the seedling mounting table 15). Can be made.

A rotation sensor (not shown) provided in the gear box 35 is brought into contact with the projection piece 39 attached to the rotation support column 31 to detect the rotation position of the rotation base 32. Alternatively, instead of this, when the rotation bases 32, 32 on both the left and right sides are rotated so as to face each other on the upper end side of the seedling placing base 15, a detection signal is output by a sensor provided at the facing portion. Then, the actuator 62 for tilting the seedling mounting table 15 forward may be operated.

Further, as shown in FIG. 1, the auxiliary base frames 59, 59 adjacent to the front fixed base 30 and the rotary base 32 of the spare seedling base 28 are flipped up via a link or the like so as to be flipped. It is foldably connected so that when an operator gets on or off the side of the traveling machine body 1, the auxiliary underframes 59 and 59 are flipped up and folded so that the operator can easily enter the control seat 6. Then, when the upper surfaces of the auxiliary underframes 59, 59 are extended to the original state so as to be flush with the upper surfaces of the front fixed base 30 and the rotary base 32, the front parts are held by the stoppers. The seedling mat 26 (with the seedling take-up plate 27) can be continuously moved from the fixed base 30 to the rotary base 32.

[Brief description of drawings]

FIG. 1 is a side view of a riding-type rice transplanter.

FIG. 2 is a plan view of a riding type rice transplanter.

FIG. 3 is a side view of an essential part showing a tilting part of a seedling table.

FIG. 4 is a perspective view of a seedling mat and a seedling removing plate.

FIG. 5 is a side sectional view of a rotating portion of the preliminary seedling stand.

FIG. 6 is a schematic plan view of a preliminary seedling stand rotating unit.

FIG. 7 is a diagram illustrating the operation of the main shift lever.

FIG. 8 is a diagram illustrating the operation of the hydraulic operating lever.

FIG. 9 is a circuit block diagram of control.

FIG. 10 is a circuit block diagram of another control. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling machine 3, 5 Wheels 6 Steering seat 10 Seedling planting device 15 Seedling mounting table 15a Seedling mat mounting part 16 Planting mechanism 11 Link mechanism 13 Hydraulic cylinder 15 Seedling mounting table 26 Seedling matting plate 28 Seedling seedling stand 31 Post 32 Rotating table 37 Drive motor 41 Main gearshift lever 42 Interlocking shaft 51 Hydraulic operation lever 56 Sensor 62 Actuator

Claims (1)

[Scope of utility model registration request] A seedling planting device is movably connected to a rear portion of a traveling body provided with a control seat via a hydraulic actuator, and the upper end of the seedling planting device is located toward the rear portion of the traveling body. In the riding-type rice transplanter, in which the seedling placing table is arranged in an inclined manner and the spare seedling placing table provided on the traveling body is rotatably provided so as to approach the upper end of the seedling placing table at least during the seedling joining operation, During the splicing work, the seedling planting device is controlled so as to be raised so that its seedling placing table is at substantially the same height as the spare seedling placing device, while the driving means provided in the seedling planting device causes the upper end of the seedling placing device to rise. The riding-type rice transplanter is provided with a control means for controlling the inclination angle of the seedling placing table to decrease so that the seedling approaches the spare seedling placing table.