JP5866846B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a working machine such as a seedling transplanting machine provided with a spare seedling stage on the side of an airframe having a traveling device.

A seedling transplanting machine provided with a seedling transplanting device at the rear part of the machine body is known which has a seedling transplanting machine provided with a spare seedling mounting portion including a plurality of spare seedling mounting tables on the side of the machine body.
In the following Patent Document 1, in the seedling transplanting machine, a plurality of preliminary seedling platforms are provided in the vertical direction of the preliminary seedling frame.

  In addition, in Patent Document 2 below, a plurality of preliminary seedling platforms are vertically stacked and overlapped in plan view, and the plurality of preliminary seedling platforms are deployed in a substantially straight line in the front-rear direction. A seedling transplanter configured to switch the plurality of preliminary seedling platforms to a state is disclosed. In this switching mechanism, a plurality of spare seedling platforms are attached to a parallel link mechanism consisting of one long moving link member and two short moving link members, and the vertical link mechanism is overlapped in a vertical direction by rotating the parallel link mechanism (plan view). And the state of the preliminary seedling stage can be switched between a state of being aligned in a substantially straight line in the front-rear direction (an unfolded state of being aligned in the horizontal direction).

Then, when any one of the plurality of spare seedling platforms is changed from the stacked state to the deployed state with respect to the fixed preliminary seedling platform, the plurality of preliminary seedling platforms are deployed. Conversely, when one of the plurality of spare seedling platforms is changed from the deployed state to the stacked posture with respect to the fixed preliminary seedling platform, a plurality of spare seedlings are obtained. In this configuration, the platform can be switched to the overlapping state.
Therefore, the configuration described in Patent Document 2 can easily and quickly switch the state of the plurality of preliminary seedling platforms, and the switching workability of the state of the plurality of preliminary seedling platforms can be improved over the prior art.

JP 2008-228705 A JP 2009-232809 A

In the above-mentioned Patent Document 1, the seedling transplanter is provided with a plurality of preliminary seedling platforms in the vertical direction of the preliminary seedling frame. However, since this preliminary seedling platform cannot change the posture, it assists at the end of the field. When an operator loads seedlings, if there is a water channel or the like at the end of the field, the distance between the auxiliary worker and the reserve seedling platform becomes long, and there is a problem that the efficiency of seedling loading work is reduced.
In addition, in the seedling transplanting machine having the configuration described in Patent Document 2, when the number of planting sections is larger than the number of seedlings that can be accommodated by the spare seedling platform, the field is wide and the seedling transplanter returns to replenishing seedlings many times. If necessary, it takes a lot of time to replenish the seedlings, and there is a problem that the work efficiency is lowered.

Further, since the working state of the spare seedling stage is configured to be switched manually, there is a problem that when the seedling is loaded and the weight increases, the operator must perform switching operation with extra effort.
Therefore, an object of the present invention is to perform a work with a simple configuration and a state in which a plurality of preliminary seedling platforms are arranged in a substantially straight line in the front-rear direction and a stacked state overlapping in the vertical direction in plan view. To provide a seedling transplanter equipped with a spare seedling mounting portion that can be automatically switched and that holds each state reliably in the deployed state and the stacked state and prevents damage due to load. .

The said subject is achieved by the following structure.
That is, the invention according to claim 1 is provided with a planting part (4) for planting seedlings in the field on the rear side of the traveling vehicle body (2), a steering unit (33) on the traveling vehicle body (2), and a traveling vehicle body. A plurality of preliminary seedling placement members (38a, 38b, 38c) for placing a seedling box on the support machine frame (49) provided in (2) and the plurality of preliminary seedling placement members (38a, 38b, 38c) are rotated respectively. A plurality of movable link members (39a, 39b, 39c) that are movably connected are attached, and a plurality of preliminary seedling placement members (38a, 38b, 38c) are moved back and forth by the rotation of the movable link members (39a, 39b, 39c). In a seedling transplanter configured to be switchable between an unfolded state aligned in a direction and a plurality of preliminary seedling placement members (38a, 38b, 38c) stacked in a vertical direction, a plurality of preliminary seedling placement members (38a, 38b, 38c) Of the above A switching drive device (70) in an open state and a stacked state is provided in the support machine frame (49). The switching drive device (70) includes a rotating member (70a), a switching actuator (71), and the switching actuator (71). And a drive switching mechanism (83) that stops the switching actuator (71) when the rotating member (70a) becomes unrotatable by rotating the rotating member (70a). ) Is provided with a switching operation member (73) for switching operation and stop of the switching drive device (70), and the switching drive device (70) is provided with a rotating member (70a), a switching actuator (71), and a drive switching mechanism (83). An internal switching unit cover (70b) is provided, and the drive switching mechanism (83) meshes with the sun gear (84) driven by the transmission from the output shaft of the switching actuator (71) and the sun gear (84). A planetary disk (88) rotatably provided with a plurality of planetary gears (85), and an internal tooth that rotates in mesh with the plurality of planetary gears (85) at a position adjacent to the planetary disk (88). (86a) and a switching drive gear (86) having external teeth (86b) that mesh and rotate with the rotating member (70a), and drive the switching actuator (71) on the outer periphery of the planetary disk (88). A stop switch (90) for stopping is provided, and a stop pin (91) that contacts the stop switch (90) is provided on the planetary disk (88), and spans between the stop pin (91) and the switching unit cover (70b). A seedling transplanting machine provided with a regulating member (92) for regulating the rotation of the planetary disk (88) .

The invention according to claim 2 is provided with a planting part (4) for planting seedlings in the field on the rear side of the traveling vehicle body (2), a steering unit (33) on the traveling vehicle body (2), and a traveling vehicle body (2 A plurality of spare seedling placement members (38a, 38b, 38c) for placing a seedling box on a support machine frame (49) provided on the support machine frame and the plurality of preliminary seedling placement members (38a, 38b, 38c) are rotatable. A plurality of moving link members (39a, 39b, 39c) to be connected to the head are attached, and the plurality of preliminary seedling placing members (38a, 38b, 38c) are moved in the front-rear direction by the rotation of the moving link members (39a, 39b, 39c). In the seedling transplanting machine configured to be switchable between a line-up deployed state and a plurality of preliminary seedling placement members (38a, 38b, 38c) arranged in a vertically stacked state, the plurality of preliminary seedling placement members (38a, 38b, 38c) Expanded state and The switching drive device (70) in the layer state is provided in the support machine frame (49), and the switching drive device (70) is rotated by the rotating member (70a), the switching actuator (71), and the switching actuator (71). And a drive switching mechanism (83) that stops the switching actuator (71) when the rotating member (70a) becomes unrotatable while rotating the rotating member (70a), and is switched to the control section (33). A switching operation member (73) for switching operation and stop of the drive device (70) is provided, the switching actuator (71) is a forward / reverse motor, and the switching actuator (71) is stopped after the switching operation member (73) is operated. If the time required until this time is less than the predetermined time, the switching actuator (71) is reversely rotated over the set time, the switching operation member (73) is operated, and then the switching actuator is operated. If data (71) is time required to stop more than a predetermined time, to characterized in that a control device (100) having a controllably configured stopped without reversely rotating the switch actuator (71) This is a seedling transplanter.

The invention according to claim 3 is provided with a planting part (4) for planting seedlings in a farm field on the rear side of the traveling vehicle body (2), a steering unit (33) on the traveling vehicle body (2), and a traveling vehicle body (2 A plurality of spare seedling placement members (38a, 38b, 38c) for placing a seedling box on a support machine frame (49) provided on the support machine frame and the plurality of preliminary seedling placement members (38a, 38b, 38c) are rotatable. A plurality of moving link members (39a, 39b, 39c) to be connected to the head are attached, and the plurality of preliminary seedling placing members (38a, 38b, 38c) are moved in the front-rear direction by the rotation of the moving link members (39a, 39b, 39c). In the seedling transplanting machine configured to be switchable between a line-up deployed state and a plurality of preliminary seedling placement members (38a, 38b, 38c) arranged in a vertically stacked state, the plurality of preliminary seedling placement members (38a, 38b, 38c) Expanded state and The switching drive device (70) in the layer state is provided in the support machine frame (49), and the switching drive device (70) is rotated by the rotating member (70a), the switching actuator (71), and the switching actuator (71). And a drive switching mechanism (83) that stops the switching actuator (71) when the rotating member (70a) becomes unrotatable while rotating the rotating member (70a), and is switched to the control section (33). A switching operation member (73) for switching operation and stop of the drive device (70) is provided, a seedling reduction detection member (94) for detecting the decrease in seedling is provided at the lower part of the planting part (4), and further at the field end A steering sensor (96) for detecting turning is provided in the handle operating portion, a counter (99) for counting the number of turning operations (x) of the steering sensor (96) is provided, and further, the traveling vehicle body (2) is provided. The reverse detection member (97) for detecting the advance is provided, and the number of turning operations (x) counted by the counter (99) in a state where the seedling decrease detection member (94) detects the decrease of the seedling. When the reverse detection member (97) detects the reverse travel of the traveling vehicle body (2) in a state where the rotation speed has reached the predetermined rotational speed, the control device has a control configuration that operates the switching actuator (71) of the switching drive device (83). a seedling transplantation machine you comprising the (100).

The invention according to claim 4 is provided with a planting part (4) for planting seedlings in the field on the rear side of the traveling vehicle body (2), a steering unit (33) on the traveling vehicle body (2), and a traveling vehicle body (2 A plurality of spare seedling placement members (38a, 38b, 38c) for placing a seedling box on a support machine frame (49) provided on the support machine frame and the plurality of preliminary seedling placement members (38a, 38b, 38c) are rotatable. A plurality of moving link members (39a, 39b, 39c) to be connected to the head are attached, and the plurality of preliminary seedling placing members (38a, 38b, 38c) are moved in the front-rear direction by the rotation of the moving link members (39a, 39b, 39c). In the seedling transplanting machine configured to be switchable between a line-up deployed state and a plurality of preliminary seedling placement members (38a, 38b, 38c) arranged in a vertically stacked state, the plurality of preliminary seedling placement members (38a, 38b, 38c) Expanded state and The switching drive device (70) in the layer state is provided in the support machine frame (49), and the switching drive device (70) is rotated by the rotating member (70a), the switching actuator (71), and the switching actuator (71). And a drive switching mechanism (83) that stops the switching actuator (71) when the rotating member (70a) becomes unrotatable while rotating the rotating member (70a), and is switched to the control section (33). A switching operation member (73) for switching operation and stop of the drive device (70) is provided, a distance information receiving member (102) is provided in a seedling storage part of a facility that is not a main seedling transplanter including a light truck, and a traveling vehicle body (2 ) Is provided with a distance information transmission member (103), a neutral detection member (105) for detecting that the operation position of the travel operation lever (45) is in the “neutral” position, and the distance information reception member (102) and the distance Information transmission member (103) has detected that are within a predetermined distance, the neutral detecting the member (105) detects the "neutral", automatically controlled to operate the switching actuator (71) of the drive switching mechanism (83) a seedling transplantation machine you comprising the control device (100) having a configuration.

The invention according to claim 5 is provided with an elevating link mechanism (3) for raising and lowering the planting part (4) relative to the traveling vehicle body (2), and is turned on when the elevating link mechanism (3) moves to a certain height. The raising / lowering link mechanism (3) is provided with a seedling replenishment detection member (95) for stopping the raising or lowering of the raising / lowering link mechanism (3), and a switching operation device for a plurality of preliminary seedling placing members (38a, 38b, 38c) ( 73. A control device (100) having a control configuration for raising or lowering the planting part (4) until the seedling replenishment detecting member (95) is turned on when the seedling replenishment detecting member (95) is turned on. The seedling transplanter according to any one of claims 1 to 4 .

The invention according to claim 6, provided with a rotating member to the switching drive (70) (70a) and switching the actuator (71) and the drive switching mechanism (83) switching unit cover interior and (70b), the switching actuator (71 ) Is an electric motor, and an auxiliary plate (79) in which the switching portion cover (70b) is provided with a rotation shaft (81) of the rotation member (70a) and a motor rotation shaft (83a) of the drive switching mechanism (83). ), A holding plate (80) made of metal was mounted across the switching portion cover (70b) and the auxiliary plate (79), and the holding plate (80) was brought into close contact with the electric motor (71). The seedling transplanting machine according to any one of claims 1 to 5, wherein the seedling transplanting machine is provided.

According to the first aspect of the present invention, the plurality of preliminary seedling placement members 38a, 38b, and 38c can be automatically switched between the expanded state and the stacked state by the operation of the switching drive device 70. There is no need to perform switching, and the work efficiency is improved as compared with the prior art. By providing the drive switching mechanism 83 also, a plurality of preliminary seedling members 38a, 38b, the working state of the 38c switches to complete, when the rotating member 7 0a becomes unrotatable, automatically switching actuator 7 1 can be stopped, it is not necessary for the operator to operate the switching drive device 70 to stop it, and the operator can perform other operations such as replenishment of seedlings, thus improving the work efficiency.

Further, a plurality of mobile link members 39a, 39 b, the 39c to goods and arms caught rotation member 7 0a is not rotated, the drive switching mechanism 83 to automatically stop the switching actuator 71, sandwiching It is possible to prevent the object from being broken or the operator from being injured, and the safety of the work is improved.

Further , when the rotation of the planetary disc 88 is restricted by a restriction member 92 provided between the stop pin 91 and the switching portion cover 70b, when the switching actuator 71 is operated to rotate the sun gear 84, only the planetary gear 85 is moved. Since the planetary gear 85 can be rotated, the switching drive gear 86 can be rotated to rotate the plurality of moving link members 39a, 39b, and 39c via the rotating member 70a.

Further, when the plurality of moving link members 39a, 39b, 39c do not move due to a thing sandwiched between the plurality of moving link members 39a, 39b, 39c, the switching drive gear 86 and the rotating member 70a are engaged with each other, and the engaging portion is locked. Since the planetary gear 85 revolves around the sun gear 84 to rotate the planetary disk 88, the stop pin 91 is brought into contact with the stop switch 90 to stop the switching actuator 71. Therefore, it is possible to prevent the members sandwiched between the plurality of moving link members 39a, 39b, 39c and the plurality of moving link members 39a, 39b, 39c from being damaged.
In particular, when the worker's body is sandwiched between the plurality of moving link members 39a, 39b, 39c, it is possible to prevent injury, so that the safety of work is improved.

According to the second aspect of the present invention, the plurality of preliminary seedling placement members 38a, 38b, and 38c can be automatically switched between the expanded state and the stacked state by the operation of the switching drive device 70. There is no need to perform switching, and the work efficiency is improved as compared with the prior art. Further, by providing the drive switching mechanism 83, when the working state of the plurality of preliminary seedling placing members 38a, 38b, 38c is completely switched and the rotating member 70a becomes unable to rotate, the switching actuator 71 is automatically stopped. Therefore, it is not necessary for the operator to operate and stop the switching drive device 70, and the operator can perform other operations such as replenishment of seedlings, thereby improving the work efficiency.
Further, when an object or arm is pinched by the plurality of moving link members 39a, 39b, 39c and the rotation member 70a stops rotating, the drive switching mechanism 83 automatically stops the switching actuator 71, so that the pinched object is broken. Or the operator can be prevented from being injured, and the safety of the work is improved.
Further, if the time required from the switching operation of the plurality of moving link members 39a, 39b, 39c to the stop of the switching actuator 71 is less than a predetermined time, the plurality of moving link members 39a, 39b, Since the thing pinched by 39c can be automatically open | released, it is prevented that the thing pinched | interposed into several moving link member 39a, 39b, 39c and several moving link member 39a, 39b, 39c are damaged.

  Further, at least 5 seconds from the start of the operation for switching the working state of the plurality of preliminary seedling placement members 38a, 38b, 38c for a predetermined time or longer (for example, 5 seconds or longer; switching operation of the plurality of moving link members 39a, 39b, 39c). When the operation state of the plurality of spare seedling placement members 38a, 38b, and 38c has been switched without any problem, the switching actuator 71 is stopped without reverse rotation, so that a plurality of spare seedlings can be obtained. Since the switching of the mounting members 38a, 38b, and 38c is automatically performed, the work efficiency is improved as compared with the prior art, and the labor of the worker is reduced.

According to the invention described in claim 3, since the plurality of preliminary seedling placement members 38a, 38b, and 38c can be automatically switched between the expanded state and the stacked state by the operation of the switching drive device 70, the operator manually There is no need to perform switching, and the work efficiency is improved as compared with the prior art. Further, by providing the drive switching mechanism 83, when the working state of the plurality of preliminary seedling placing members 38a, 38b, 38c is completely switched and the rotating member 70a becomes unable to rotate, the switching actuator 71 is automatically stopped. Therefore, it is not necessary for the operator to operate and stop the switching drive device 70, and the operator can perform other operations such as replenishment of seedlings, thereby improving the work efficiency.
Further, when an object or arm is pinched by the plurality of moving link members 39a, 39b, 39c and the rotation member 70a stops rotating, the drive switching mechanism 83 automatically stops the switching actuator 71, so that the pinched object is broken. Or the operator can be prevented from being injured, and the safety of the work is improved.

Furthermore, when the amount of seedlings loaded on the planting unit 4 is small, when the seedling transplanter approaches the end of the field to replenish seedlings and moves the body to the seedling replenishing position, each spare seedling is automatically loaded. Since the working states of the bases 38a, 38b, and 38c are switched, the seedling loading operation can be quickly performed, and the working efficiency is improved as compared with the conventional one.
When the reverse detection member 97 is a rear wheel rotation sensor, the switching actuator 71 is operated to switch the plurality of preliminary seedling placement members 38a, 38b, and 38c to the loaded state when a predetermined number of rotations (1-2 rotations) is detected. With this configuration, the planting operation is not performed without forgetting to operate the plurality of preliminary seedling placement members 38a, 38b, and 38c, and the plurality of preliminary seedling placement members 38a, 38b, and 38c in the expanded state are Contact with an object is prevented, the safety of work is improved, and the loaded seedlings are less likely to slip off, and it is not necessary to pick up the dropped seedlings, thereby improving the work efficiency.

According to the fourth aspect of the present invention, since the plurality of preliminary seedling placement members 38a, 38b, and 38c can be automatically switched between the expanded state and the stacked state by the operation of the switching drive device 70, the operator manually performs the operation. There is no need to perform switching, and the work efficiency is improved as compared with the prior art. Further, by providing the drive switching mechanism 83, when the working state of the plurality of preliminary seedling placing members 38a, 38b, 38c is completely switched and the rotating member 70a becomes unable to rotate, the switching actuator 71 is automatically stopped. Therefore, it is not necessary for the operator to operate and stop the switching drive device 70, and the operator can perform other operations such as replenishment of seedlings, thereby improving the work efficiency.
Further, when an object or arm is pinched by the plurality of moving link members 39a, 39b, 39c and the rotation member 70a stops rotating, the drive switching mechanism 83 automatically stops the switching actuator 71, so that the pinched object is broken. Or the operator can be prevented from being injured, and the safety of the work is improved.
Furthermore, the reservoir of the seedlings provided on seedling transplanter non equipment vehicle body 2 of the seedling transplantation machine proximate to, automatically plurality of preliminary seedling member 3 8a becomes a stop state such as light trucks, 38b, By adopting a configuration in which 38c is switched to the unfolded state, the seedling loading operation can be performed more efficiently, and the work efficiency is improved.

Also, when the neutral detecting member 97 becomes non-detection state, or when the distance information receiving member 1 02 and the distance information transmitting member 1 03 is non-detection state, a plurality of preliminary seedling members 38a, 38b, 38c are stacked state Since the operation to change the plurality of spare seedling placement members 38a, 38b, 38c to the loaded state at the time of planting work is not forgotten, the safety of the work is improved as compared with the conventional, Since the fall is prevented, there is no need to pick up the dropped seedling, and the work efficiency is improved as compared with the conventional one.
According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, a plurality of preliminary seedling placement members 38a, 38b are operated by operating the switching operation device 73. , 38c, the planting part 4 automatically moves to a predetermined height (raises or descends) when the working state is switched, so that the seedlings can be easily loaded when replenishing the seedlings, and the work efficiency is improved compared to the conventional one. To do.
From the detection value of the seedling replenishment detection member 95 provided in the lifting link mechanism 3, it is determined whether the current height of the planting part 3 is above or below the detection height of the seedling replenishment detection member 95. The oil feeding direction of the valve of the lifting hydraulic cylinder 46 of the lifting link mechanism 3 can be determined.
According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the holding plate 80 is provided across the switching portion cover 70b and the auxiliary plate 79, Since the electric motor 71 is mounted on the holding plate 80, when a load is applied to the first, second, and third moving link members 39a, 39b, and 39c, a force for the electric motor 71 to escape is applied to the holding plate 80, Since the switching portion cover 70b receives this force, the holding plate 80 is difficult to bend.
Further, since no force is applied to the electric motor 71 due to the load, the escape of the electric motor 71 is prevented, and the distance between the electric motor 71 and the rotating member 70a is prevented from being separated. The work is omitted, and the labor of the worker is reduced.
Further, since the holding plate 80 is made of metal and the holding plate 80 is in close contact with the electric motor 71, even if the coil portion generates heat due to the operation of the electric motor 71, the heat is exhausted through the holding plate 80. Therefore, the electric motor 71 is prevented from being stopped due to overheating, and the work efficiency is improved.
Furthermore, since it is not necessary to form the space part which takes in cooling air in the switch part cover 70b, it prevents that water and mud adhere to the electric motor 71, and prevents the electric motor 71 from being damaged.

It is a side view of the riding type rice transplanter of one embodiment of the present invention. It is a top view of the riding type rice transplanter of FIG. FIG. 2 is a side view of the case where the preliminary seedling platforms of the riding type rice transplanter of FIG. 1 are arranged in three upper and lower stages (stacked state). FIG. 3 is a simplified side view when the preliminary seedling platforms of the riding type rice transplanter of FIG. 1 are arranged in three upper and lower stages (laminated state). It is a top view when the reserve seedling stand of the riding type rice transplanter of FIG. 1 is arranged on the same plane (deployed state). It is a control block diagram of the riding type rice transplanter of FIG. 1 centering on the operation | movement control apparatus of a preliminary seedling stand. FIG. 7 is a plan view (FIG. 7 (a)) in a normal state of the drive switching mechanism of the spare seedling platform of the riding type rice transplanter in FIG. 1 and a plan view (FIG. 7 (b)) when an object is sandwiched between the links. . FIGS. 8A and 8B are a perspective view (FIG. 8A) and a plan view (FIG. 8B) illustrating how the planetary gear is attached to the planetary disk of the drive switching mechanism of FIG. 7. It is a flowchart which performs control for the drive switching of the reserve seedling stand of the riding type rice transplanter of FIG. It is a flowchart which raises / lowers a planting part by the presence or absence of the seedling replenishment detection to the seedling planting part of the riding type rice transplanter of FIG. FIG. 11A is a plan view showing an example of a drive switching mechanism for a spare seedling platform of the riding type rice transplanter shown in FIG. 1 and FIG. 11B is a view from the bottom of FIG. 11A. Figure).

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 are a side view and a plan view of a riding type rice transplanter equipped with a fertilizer application device as a granular material feeding device which is a typical example of the seedling transplanter of the present invention. In this riding type rice transplanter 1 with a fertilizer application, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so that the seedling planting portion 4 can be moved up and down. Is provided. The boarding operator refers to the left and right directions in the forward direction of the riding type rice transplanter as left and right, respectively, and the forward direction and the reverse direction are referred to as forward and backward, respectively.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 (traveling devices) as drive wheels, and a transmission case 12 is disposed at the front of the airframe. Front wheel final cases 13, 13 are provided on the left and right sides of the transmission case 12, and the left and right front wheels project outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. Left and right front wheels 10, 10 are respectively attached to the axles. Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18, with a rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum. The rear wheels 11 and 11 are attached to a rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via a belt transmission device 21 and a hydraulic continuously variable transmission (HST) 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26, and also the fertilizer application device 5 by the fertilization transmission mechanism 28. Is transmitted to.

  The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

  The elevating link device 3 is a parallel link mechanism, and includes a single upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44.

An elevating hydraulic cylinder 46 is provided between a support member (not shown) fixed to the main frame 15 and the tip of a swing arm (not shown) formed integrally with the upper link 40. By expanding and contracting with hydraulic pressure, the upper link 40 is rotated up and down, and the seedling planting portion 4 is lifted and lowered with a substantially constant posture.
The seedling planting section 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings one by one to the seedling outlets 51a,. When all the seedlings are supplied to the seedling outlet 51a, ..., the seedling feeding base 51b, ..., the seedling stage 51 for transferring the seedling downward, the seedling planting planting the seedling supplied to the seedling outlet 51a, ... in the field Attaching device 52,..., A pair of left and right drawing markers 75 (FIG. 1) and the like for drawing the aircraft path in the next stroke to the topsoil surface.

  In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 56, 56 in contact with the mud surface of the field, the floats 55, 56, 56 slide while leveling the mud surface, and the seedling planting device 52, ... to plant seedlings. Each of the floats 55, 56, and 56 is rotatably mounted so that the front end side moves up and down in accordance with the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor during planting work. The planting depth of the seedling is detected by switching a hydraulic valve (not shown) that controls the lifting hydraulic cylinder 46 according to the detection result and raising and lowering the seedling planting unit 4 according to the detection result. Is always kept constant.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... And applies the fertilizer to the left and right sides of the floats 55, 56, 56 with the fertilizer hoses 62,. Guide to a guide (not shown), ..., and drop into a fertilization groove formed in the vicinity of the side of the seedling planting line by a grooved body 76 (Fig. 1) provided on the front side of the fertilization guide, ... It has become. The air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hoses 62,... Via the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hoses 62,. It is designed to be transported.

The seedling planting unit 4 is provided with a rotor 27 (an example of a combination of the first rotor 27a and the second rotor 27b may be simply referred to as the rotor 27) as an example of a leveling device. The seedling platform 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame body 65 that is a full width in the left-right direction and the up-down direction that supports the entire seedling planting unit 4 as a rail.
In addition, on the left and right sides of the front part of the traveling vehicle body 2, a pair of spare seedling platforms 38, 38 on which replenishment seedlings are placed can be pivoted to a position where they protrude from the front and back of the machine body and a position where they are aligned vertically. Is provided.

FIG. 3 shows a side view when the first preliminary seedling stage 38a, the second preliminary seedling stage 38b, and the third preliminary seedling stage 38c on one side of the machine body are arranged in three upper and lower stages. Further, FIG. 4 shows a side view when the first preliminary seedling stage 38a, the second preliminary seedling stage 38b, and the third preliminary seedling stage 38c are arranged on the same plane.
The preliminary seedling table 38 is supported by a support machine frame 49 having a base side disposed below the floor step 35 of the traveling vehicle body 2, and is configured in three upper and lower stages via moving link members 39a, 39b, and 39c, respectively. It comprises a preliminary seedling stage 38a, a second preliminary seedling stage 38b, and a third preliminary seedling stage 38c.

  A first support frame body 37a, a second support frame body 37b, and a third support frame are integrally formed on the bottom surfaces of the first preliminary seedling stage 38a, the second preliminary seedling stage 38b, and the third preliminary seedling stage 38c, respectively. A body 37c is attached, and rotation shafts 39a1 and 39a2 at both ends of the first moving link member 39a are rotatable at the center of the first support frame 37a and the front end of the second support frame 37b, respectively. The rotating shafts 39b1 and 39b2 at both ends of the second moving link member 39b are rotatably connected to the rear end portion of the first support frame body 37a and the front end portion of the third support frame body 37c, respectively. Rotating shafts 39c1 and 39c2 at both ends of the third moving link member 39c are rotatably connected to the rear end of the second support frame 37b and the center of the third support frame 37c.

The outer peripheral portions of the rotation shafts 39a2, 39b1, 39b2, and 39c1 are attached to the support frame bodies 37a, 37b, and 37c by welding, respectively. Then, support pieces (not shown) of the moving link members 39a, 39b, and 39c are inserted into insertion portions (not shown) of the rotating shafts 39a2, 39b1, 39b2, and 39c1 respectively welded to the support frames 37a, 37b, and 37c. ) And insert.
Further, a rotation fulcrum 37b1 is provided at a substantially central portion of the second moving link member 39b and a substantially central portion of the second support frame body 37b so as to be rotatable with respect to each other.

  The support machine frame 49 is provided with two front and rear branch posts 49a and 49b, and the tops of the branch posts 49a and 49b reach the vicinity of the lower surface of the second support frame 37b. A rotating shaft 39b3 provided near the center of the second moving link member 39b is provided near the top of the front branching column 49a, and the second moving link member 39b is centered on the rotating shaft 39b3. It is freely rotatable around 49a. The rotation shaft 39b3 is provided on the second moving link member 39b below the rotation fulcrum 37b1. Further, a rotating shaft 39c3 provided near the rear end of the third moving link member 39c is provided near the top of the rear branch post 49b, and the third moving link member 39b is located behind the rotating shaft 39c3. It is freely rotatable around the side branch column 49b. The rotation shaft 39c3 is provided on the third moving link member 39c below the rotation shaft 39c1.

  The second preliminary seedling table 38b is not fixed to the front branch support machine frame 49a and the rear support machine frame 49b, which are machine body members, and the second moving link member 39b has the rotation fulcrum 39b3 from the state shown in FIG. When the center pivots to the state shown in FIG. 4, the pivot fulcrum 39b3 is below the pivot shaft 37b1 on the side surface of the central portion of the second preliminary seedling stage 38b. A second preliminary seedling table 38b is arranged on the side. At this time, when the third moving link member 39c also turns from the state shown in FIG. 3 around the turning fulcrum 39c3 to the state shown in FIG. It is arranged in front of the position shown.

  Therefore, as shown in the plan view of FIG. 5, when the first preliminary seedling stage 38a, the second preliminary seedling stage 38b, and the third preliminary seedling stage 38c are deployed on substantially the same plane, a wide seedling box (FIG. These three preliminary seedling platforms 38a, 38b, 38c are moved more forward than in the past to project the front end of the machine body out of the field. Therefore, for example, it becomes easy to load seedlings from the truck or the like onto the preliminary seedling placing bases 38a, 38b, and 38c at the shore.

  Further, as shown in the plan view of FIG. 5, a pair of front projecting portions 38a1, 38b1, and 38c1 projecting forward are provided at both front end portions of the first, second, and third preliminary seedling platforms 38a, 38b, and 38c. Respective projecting portions 38 a 2, 38 b 2, and 38 c 2 are formed at the center of the rear end portion and projecting rearward. Therefore, when the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are in the expanded configuration, the rear protrusions 38a2 and 38b2 of the preliminary seedling platforms 38a and 38b that are located on the front side of the machine body are located on the rear side of the machine body. It will be arranged at a position that overlaps with the front protrusions 38b1 and 38c1 of the positioned preliminary seedling platforms 38b and 38c in a side view. Therefore, when the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are arranged in the front-rear direction, the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are moved in the front-rear direction. Therefore, the seedling boxes loaded on the preliminary seedling platforms 38a, 38b, and 38c can be smoothly moved to the rear side, and the work efficiency is improved as compared with the prior art.

  Further, as shown in the side views of FIGS. 3 and 4, the front protrusions 38a1, 38b1, and 38c1 of the first, second, and third preliminary seedling platforms 38a, 38b, and 38c have a rear-upward inclined shape (a rear-upward-inclined portion). ), And the upper surface of the inclined shape is made higher than the seedling placement surfaces of the preliminary seedling placement stands 38a, 38b, and 38c. Further, the rear protrusions 38a2, 38b2, and 38c2 of the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are made higher than the seedling mounting surfaces of the preliminary seedling platforms 38a, 38b, and 38c, and the front side It is the same as the upper surface of protrusion part 38a1, 38b1, 38c1, or is made lower than the said upper surface.

  Since the front protrusions 38a1, 38b1, and 38c1 are rearwardly inclined portions in this way, when the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are in the unfolded state, the front preliminary seedling platform When moving a seedling box or the like from the rear seedling stand 38b or 38c on the rear side from 38a or 38b, it can be placed on the rear-upward inclined portion and moved rearward, so that the seedling box or the like can be easily moved, Work efficiency is improved than before. Further, the upper surfaces of the front protrusions 38a1, 38b1, 38c1 and the rear protrusions 38a2, 38b2, 38c2 are made higher than the seedling mounting surfaces of the preliminary seedling mounting bases 38a, 38b, 38c. The seedlings placed on the preliminary seedling placement stands 38a, 38b, 38c with the front protrusions 38a1, 38b1, 38c1 and the rear protrusions 38a2, 38b2, 38c2 when the seedling placement stands 38a, 38b, 38c are stored. Since the box can be prevented from moving back and forth, it is possible to prevent the seedling box, etc. from dropping downward from each of the spare seedling platforms 38a, 38b, 38c, eliminating the need to pick up the dropped seedling box, etc. Is improved from the conventional level.

  Between the left and right sides of the pair of front protrusions 38a1, 38b1, 38c1 of each of the spare seedling platforms 38a, 38b, 38c, and at the bottom of the preliminary seedling platforms 38a, 38b, 38c, the front preliminary seedling platforms 38a, 38b Receiving members 38a3, 38b3, 38c3 for receiving the rear protrusions 38a2, 38b2, etc. are provided, respectively, and the receiving members 38a3, 38b3, 38c3 protrude into the space between the pair of front protrusions 38a1, 38b1, 38c1. Formed.

  In this way, the receiving members 38b3 and 38c3 receive the rear protrusions 38a2 and 38b2 of the front spare seedling platforms 38a and 38b between the front side protrusions 38b1 and 38c1 of the preliminary seedling platforms 38b and 38c. Therefore, the preliminary seedling platforms 38a, 38b, and 38c are not lowered too much, and the deployed preliminary seedling platforms 38a, 38b, and 38c are surely arranged on substantially the same plane. Loading work such as is easy, and work efficiency improves than before.

  Further, by providing the receiving members 38a3, 38b3, 38c3 at the bottom of the preliminary seedling mounts 38a, 38b, 38c, the upper ends of the rear protrusions 38a2, 38b2, 38c2 are the upper ends of the front protrusions 38a1, 38b1, 38c1. Since it is located at the same height as the lower part or on the lower side, the movement of the seedling box mounted on the front protrusions 38a1, 38b1, 38c1 having the rear rising slope part is smoothly performed, so that the work efficiency is improved than before. To do.

In addition, first, second and third partition walls 38a4, 38b4 which prevent the seedling box from falling at a total of four locations before and after the left and right side surfaces of the first, second and third preliminary seedling platforms 38a, 38b and 38c. 38c4 is arranged.
Further, the rotation fulcrum 39b3 of the second moving link member 39b may be provided coaxially with the rotation shaft 37b1 of the second preliminary seedling stage 38b. In this case, the center second preliminary seedling table 38b does not move back and forth.

  As described above, the operation of the first, second, and third moving link members 39a, 39b, and 39c (rotation) causes the first, second, and third preliminary seedling platforms 38a, 38b, and 38c to move in the front-rear direction. The switching state is switched between the aligned state and the preliminary seedling platforms 38a, 38b, and 38c stacked in the vertical direction. This switching can be performed by the switching drive device 70 that is driven by the electric motor 71. As shown in FIG. 3, the switching drive device 70 has a circular shape in which a drive gear 83x of a drive switching mechanism 83 attached to a rotation shaft (not shown) of an electric motor 71 rotates integrally with a rotation shaft 39b3 of a moving link member 39b. It is provided so as to mesh with the switching gear 70a.

The switching gear 70a is provided concentrically with the rotation shaft 39b3 of the moving link member 39b provided on the front branch post 49a, and rotates together with the rotation shaft 39b3. Therefore, the rotation shaft 39b3 is driven by the drive of the electric motor 71. And the second moving link member 39b integral with the rotating shaft 39b3 is rotated at the same time, so that the first, second, and third moving link members 39a, 39b, and 39c are in the stacked state and the deployed state. Can be switched.
FIG. 6 shows a control block diagram centering on the operation control of the preliminary seedling stage 38a, 38b, 38c.
A switching switch 73 (which may be a button or a lever) (FIG. 1) is provided in the vicinity of the seat 31 as a switching operation means for switching the preliminary seedling platforms 38a, 38b, and 38c between the deployed state and the stacked state by the switching drive device 70. Yes.
The switching gear 70a and the electric motor 71 are rotated by the electric motor 71 to rotate the switching gear 70a, and when the switching gear 70a becomes unrotatable, a drive switching mechanism 83 that stops the electric motor 71 is provided to the switching drive device 70. Provided.

  FIG. 7 shows a drive switching mechanism 83 different from the drive switching mechanism 83 shown in FIG. As shown in the plan view of FIG. 7, the drive switching mechanism 83 of this embodiment is a planetary gear mechanism, and is arranged in the switching unit cover 70 b together with the fan-shaped switching gear 70 a having the rotation shaft 81 and the electric motor 71. The drive switching mechanism 83 is provided with a sun gear 84 that is driven by transmission from an output shaft (not shown) of the electric motor 71 and three planetary gears 85 that rotate in mesh with the sun gear 84 so as to be rotatable. Consists of a planetary disk 88. The planetary disk 88 is shown in the perspective view of FIG. 8A and the plan view of FIG. In addition, the figure which shows the rotation direction of the sun gear 84 grade | etc., Is shown in FIG.7 (b).

A switching drive gear 86 having internal teeth 86a that rotate while meshing with the three planetary gears 85 and external teeth 86b that mesh and rotate with the switching gear 70a is provided at a position adjacent to the planetary disk 88. A stop switch 90 for stopping the driving of the electric motor 71 is provided on the outer periphery of the planetary disc. A stop pin 91 that contacts the stop switch 90 is provided on the planetary disc 88. Further, one end is locked to the stop pin 91 and the other end is switched. A spring 92 that is locked to the part cover 70b is disposed.

  When the rotation of the planetary disk 88 is restricted by a spring 92 provided between the stop pin 91 and the switching unit cover 70b, the electric motor 71 is operated to rotate the sun gear 84, thereby rotating the planetary disk 88. Since only the planetary gear 85 can be rotated without rotation, even if the switching drive gear 86 is rotated by the rotation of the planetary gear 85, the moving link members 39a, 39b, 39c are rotated via the switching gear 70a. It will not be configured.

Further, when the moving link members 39a, 39b, 39c do not move due to an object caught in the moving link members 39a, 39b, 39c, etc., the meshing portion of the switching drive gear 86 and the switching gear 70a is locked and does not move. As a result, the planetary gear 85 revolves around the sun gear 84 and rotates the planetary disc 88, so that the stop pin 91 is brought into contact with the stop switch 90 and the stop switch 90 stops the electric motor 71. Thus, it is possible to prevent the objects sandwiched between the moving link members 39a, 39b and 39c and the moving link members 39a, 39b and 39c themselves from being damaged.
In particular, when the worker's body is sandwiched between the moving link members 39a, 39b, and 39c, it is possible to prevent injury, so that work safety is improved.

  With the above-described configuration, each of the preliminary seedling platforms 38a, 38b, and 38c can be automatically switched between the unfolded state and the stacked state by operating the switching drive device 70, so that it is not necessary for the operator to switch manually. Work efficiency is improved than before. Further, by providing the drive switching mechanism 83, when the working state of each of the preliminary seedling platforms 38a, 38b, 38c is completely switched and the switching gear 70a becomes unable to rotate, the electric motor 71 is automatically connected to the gear 70a. Since it can be stopped by locking, it is not necessary for the operator to operate the switching drive device 70 to stop it, and the operator can perform other operations such as replenishment of seedlings, thus improving the work efficiency.

  Further, when an object or arm is caught between the moving link members 39a, 39b, 39c and the switching gear 70a does not rotate, the drive switching mechanism 83 automatically stops the electric motor 71. It is possible to prevent a person from being injured, and work safety is improved.

  Further, if the electric motor 71 is a forward / reverse motor, when the control device 100 contacts the stop switch 90 with the stop pin 91, the electric motor 71 is reversely rotated for a predetermined time (for example, 0.5 to 1.5 seconds). Thereafter, the control configuration may be stopped. However, if the stop pin 91 comes into contact with the stop switch 90 after, for example, 5 seconds or more after the operation of the changeover switch 73, the control device 100 can control to stop the electric motor 71 without rotating backward. Also good. A control flow in this case is shown in FIG.

  Thus, since the electric motor 71 is configured to rotate reversely when the stop pin 91 contacts the stop switch 90, an object sandwiched between the moving link members 39a, 39b, 39c can be automatically released. It is possible to prevent the pinched object and the moving link members 39a, 39b, 39c themselves from being damaged.

  In addition, a state in which a predetermined time or more (for example, 5 seconds or more from the start of the operation) has elapsed since the switching operation of the moving link members 39a, 39b, 39c, that is, the working state of each of the spare seedling platforms 38a, 38b, 38c has been switched without any problem In some cases, the configuration is such that the electric motor 71 is stopped without rotating in reverse, so that each of the spare seedling platforms 38a, 38b, 38c is automatically switched. Labor is reduced.

  In addition, since the rice transplanter 1 of the present embodiment is provided with the lifting link mechanism 3 that lifts and lowers the planting part 4 with respect to the traveling vehicle body 2, the seedling replenishment detection sensor 95 (the lifting link mechanism 3 has a certain height (for example, , 40 to 50 cm), which is turned on when it is moved (raised or lowered) is provided in the control unit 33, the control device 100 is operated by the operation switch 73 for each of the spare seedling platforms 38a, 38b, 38c. Then, control for raising or lowering the planting unit 4 with the elevating hydraulic cylinder 46 can be executed until the seedling replenishment detection sensor 95 is turned on. A flowchart of control in this case is shown in FIG.

  Under the above control, when the changeover switch 73 is operated to switch the working state of each of the spare seedling platforms 38a, 38b, 38c, the planting unit 4 automatically moves (rises or descends) to a predetermined height. When replenishing, seedlings are easy to load, and work efficiency is improved compared to the past.

In addition, a seedling reduction detection sensor 94 that detects a decrease in seedlings is provided below the planting unit 4, and a steering sensor 96 that detects a turn (U-turn) at the end of the field is provided in the steering wheel operation unit. turning operation number of 96 (x) providing a counter 99 to count, (or in a way that the rear wheel rotation sensor detects the rotation of the reverse direction) further back sensor 97 for detecting the backward to detect the reverse of the vehicle body 2 the may be provided, in a state in which the seedling decrease detection sensor 94 has detected a decrease in seedlings, counted turning operation number in front Symbol counter 99 (x) is changed by a predetermined rotational speed (field area and planting conditions If.) back sensor 97 in a state that reached detects the reverse of the aircraft, the control equipment 1 0 0 includes a control arrangement for operating the electric motor 71 of the switching drive unit 83 That.

  With the above control configuration, when the amount of seedlings loaded on the planting unit 4 is small, when the seedling transplanter approaches the field end for replenishment and moves the body to the seedling replenishment position, Since the working states of the seedling platforms 38a, 38b, and 38c are switched, the seedling loading operation can be performed quickly, and the working efficiency is improved as compared with the conventional one.

  In the case where the back sensor 97 is a rear wheel rotation sensor, the electric motor 71 is operated so as to switch the spare seedling platforms 38a, 38b, 38c to the loaded state when a predetermined number of rotations (1-2 rotations) is detected. Then, without carrying out the planting operation without forgetting the operation of each of the spare seedling platforms 38a, 38b, and 38c, each of the preliminary seedling platforms 38a, 38b, and 38c in the expanded state comes into contact with a person or an object at the field end. As a result, the safety of the work is improved, and the loaded seedlings are less likely to slip off, and it is not necessary to pick up the dropped seedlings, thus improving the work efficiency.

  In addition, a distance information receiver 102 is provided in a seedling storage part of a facility that is not a main seedling transplanter such as a light truck, a distance information transmitter 103 is provided in the traveling vehicle body 2 of this embodiment, and a speed change such as an HST 23 disposed in the control part 33 is provided. A neutral detection member (neutral sensor = potentiometer) 105 for detecting that the operation position of the travel operation lever 45 for operating the device is “neutral” of the transmission is provided, and the control device 100 receives a distance information receiver (distance information reception). Sensor 102 and distance information transmitter (distance information transmission sensor) 103 are detected to be within a predetermined distance, and when neutral detection member 105 detects “neutral”, electric motor 71 of drive switching mechanism 83 is automatically operated. The control to be executed is executed.

  Thus, when the traveling vehicle body 2 of the seedling transplanter comes close to a seedling storage section provided in a facility that is not a main seedling transplanter such as a light truck and stops, the spare seedling platforms 38a, 38b, and 38c are automatically deployed. By adopting a configuration that switches to a state, it is possible to more efficiently load seedlings, and work efficiency is improved.

  In addition, when the neutral detection sensor 105 is in a non-detection state, or when the distance information receiver 102 and the distance information transmitter 103 are in a non-detection state, the spare seedling platforms 38a, 38b, and 38c are switched to the loading state. In addition, since the operation of changing each of the spare seedling platforms 38a, 38b, 38c to the loaded state is not forgotten during the planting operation, the safety of the work is improved and the seedling is prevented from falling. There is no need to pick up the work, improving work efficiency.

Further, the coil portion of the electric motor 71 can be brought into close contact with the iron plate cover to radiate the heat generated by the motor 71 to the iron plate cover.
An embodiment of the switching drive device 70 is shown in the plan view of FIG. 11A and the internal structure diagram of FIG. In this embodiment, the electric motor is moved out of phase with the rotation shaft 81 of the fan-shaped switching gear 70a that moves the first, second, and third moving link members 39a, 39b, and 39c to the cover plate 70b that constitutes the switching drive device 70. The auxiliary plate 79 provided with the rotation shaft 83a of the drive switching mechanism 83 is mounted. A configuration is adopted in which a motor mounting plate (holding plate) 80 is mounted across the cover plate 70b and the auxiliary plate 79, and an electric motor 71 for rotating the rotating gear 70a is mounted on the holding plate 80. .

  By the way, as shown in FIG. 3, stop plates 73a1 and 73a2 for stopping the preliminary seedling platforms 38a, 38b and 38c are provided on the side surfaces of the second preliminary seedling platform 38b and the third preliminary seedling platform 38c, respectively. When the preliminary seedling platforms 38a, 38b, 38c are in the deployed state, the stop plate 73a1 hits the stop plate 73a1 with the second moving link member 39b and overloads the electric motor 71 to generate an excessive voltage, or The stop plate 73a2 hits the second moving link member 39b when the spare seedling platforms 38a, 38b, and 38c are stacked, and overloads the electric motor 71 to apply an excessive voltage. It is a member that stops the operation by generating or overheating.

In the switching drive device 70 configured as described above, the holding plate 80 is provided across the cover plate 70b and the auxiliary plate 79, and the electric motor 71 is mounted on the holding plate 80, so the first, second, and third moving links. When the members 39a, 39b, 39c come into contact with the stop plates 73a1, 73a2 and a load is applied, the force by which the electric motor 71 escapes is applied to the holding plate 80, and the force is received by the cover plate 70b, so the holding plate 80 is bent. It becomes difficult.
Further, since no force is applied to the electric motor 71 due to the load, the electric motor 71 is prevented from escaping, and the distance between the electric motor 71 and the switching gear 70a is prevented from being increased. Is omitted, and the labor of the operator is reduced.

Further, since the holding plate 80 is made of metal and the holding plate 80 is in close contact with the coil portion of the electric motor 71, even if the coil portion generates heat due to the operation of the electric motor 71, the holding plate 80 passes through the holding plate 80. Since exhaust heat is performed, stopping of the electric motor 71 due to overheating is prevented, and work efficiency is improved.
Further, since it is not necessary to form a space for taking in cooling air in the cover plate 70b, water and mud are prevented from adhering to the electric motor 71, and the electric motor 71 is prevented from being damaged.
Note that the holding plate 80 is made of a metal having high thermal conductivity, or when a metal having high thermal conductivity is plated, it is easy to remove heat from the electric motor 71, and the exhaust heat efficiency of the electric motor 71 is further improved.

  By arranging a torque spring (not shown) on the rotation shaft 39b3 of the second moving link member 39b, it is possible to assist when the electric motor 71 rotates the second moving link member 39b. The torque spring begins to rotate when the preliminary seedling platforms 38a, 38b, 38c start to rotate from the stacked state, and when the second moving link member 39b is perpendicular to the ground, the preliminary seedling platforms 38a, 38b, 38c As the position approaches the deployed state, the acting force of the torque spring gradually increases, and the torque spring torque is maximized when the deployed state is reached.

Therefore, the shaking is reduced when the reserve seedling platforms 38a, 38b, 38c are deployed, and the seedling boxes on the preliminary seedling platforms 38a, 38b, 38c are stabilized.
Further, even if the driving force of the electric motor 71 is weakened, it is possible to surely switch from the stacked state of the preliminary seedling platforms 38a, 38b, and 38c to the deployed state, so that the electric motor 71 is prevented from being damaged by a load. .

  The seedling transplanter of the present invention is not limited to a rice transplanter, and may be used as a seedling transplanter for planting other seedlings such as vegetable seedlings.

DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter with fertilizer 2 Traveling vehicle body 3 Elevating link device 4 Seedling planting part 5 Granule feeding device (fertilizer) 10 Front wheel 11 Rear wheel 12 Mission case 13 Front wheel final case 15 Main frame 18 Rear wheel gear case 20 Engine 21 Belt transmission 23 Hydraulic continuously variable transmission (HST)
25 Planting clutch case 26 Planting transmission shaft 27 (27a, 27b) Rotor (first rotor, second rotor)
28 Fertilizer transmission mechanism 30 Engine cover 31 Seat 32 Front cover 33 Control section 34 Handle 35 Floor step 36 Rear steps 37a, 37b, 37c First to third support frames 37b1 Rotating shafts 38a, 38b, 38c First to third Preliminary seedling mounts 38a1, 38b1, 38c1 Front protrusions 38a2, 38b2, 38c2 Rear protrusions 38a3, 38b3, 38c3 Receiving members 38a4, 38b4, 38c4 First to third partition walls 39a, 39b, 39c First to third Moving link member 39a1, 39a2, 39b1, 39b2 Rotating shaft 39c1, 39c2, 39b3, 39c3 Rotating shaft 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting shaft 45 Traveling operation lever 46 Lifting hydraulic cylinder 49 ( 49a, 49b) Supporting machine frame Branch posts)
DESCRIPTION OF SYMBOLS 50 Transmission case 51 Seedling stand 51a Seedling outlet 51b Seedling feed belt 52 Seedling planting device 53 Blower electric motor 55 Center float 56 Side float 58 Blower 59 Air chamber 60 Fertilizer hopper 61 Feeding part 62 Fertilizer hose 65 Support frame 65a Support roller 70 Switching drive device 70a Switching gear 70b Switching section cover 71 Electric motor 73 Switching switches 73a1, 73a2 Stop plate 75 Drawing marker
76 Groove body 79 Auxiliary plate 80 Motor mounting plate (holding plate)
81 Rotating shaft 83 Drive switching mechanism (for electric motor drive)
83a Rotating shaft 83x Drive gear 84 Sun gear 85 Planetary gear 86 Switching drive gear 86a Internal tooth 86b External tooth 88 Planetary disk 88a Rod 90 Stop switch 91 Stop pin 92 Spring 94 Seedling reduction detection sensor 95 Seedling supplement detection sensor 96 Steering sensor 97 Back sensor 99 Turn counter 100 Control device 102 Distance information receiver 103 Distance information transmitter 105 Neutral detection member

Claims (6)

A planting part (4) for planting seedlings in the field is provided on the rear side of the traveling vehicle body (2), a control unit (33) is provided on the traveling vehicle body (2), and a support machine frame ( 49) a plurality of spare seedling placement members (38a, 38b, 38c) for placing a seedling box and a plurality of movable link members for rotatably connecting the plurality of preliminary seedling placement members (38a, 38b, 38c). (39a, 39b, 39c) are attached, and a plurality of preliminary seedling placement members (38a, 38b, 38c) are arranged in the front-rear direction and a plurality of preliminary seedlings by rotating the movable link members (39a, 39b, 39c). In the seedling transplanting machine configured so that the placing members (38a, 38b, 38c) can be switched to a stacked state in which they are arranged in the vertical direction,
Provided in the support machine frame (49) is a switching drive device (70) between the expanded state and the stacked state of a plurality of preliminary seedling placement members (38a, 38b, 38c),
The switching drive device (70) is rotated by the rotating member (70a), the switching actuator (71) and the switching actuator (71) to rotate the rotating member (70a), and the rotating member (70a) A drive switching mechanism (83) that stops the switching actuator (71) when rotation becomes impossible is provided, and a switching operation member (73) that switches between operation and stop of the switching drive device (70) is provided in the control section (33). ,
The switching drive device (70) is provided with a switching portion cover (70b) that houses a rotating member (70a), a switching actuator (71), and a drive switching mechanism (83). The drive switching mechanism (83) is provided with a switching actuator (71). ) And a planetary disk (88) rotatably provided with a sun gear (84) driven by transmission from the output shaft and a plurality of planetary gears (85) rotating in mesh with the sun gear (84). An internal tooth (86a) that meshes with and rotates with the plurality of planetary gears (85) and an external tooth (86b) that meshes with the rotating member (70a) and rotates at positions adjacent to the disk (88). A stop switch (90) that includes a switching drive gear (86) and that stops driving of the switching actuator (71) is provided on the outer periphery of the planetary disk (88), and contacts the stop switch (90) on the planetary disk (88). Provided stop pins (91), seedlings transplanted characterized in that a regulating member for regulating the rotation of the planet disk (88) (92) over the stop pin and (91) and the switching cover (70b) Machine. A planting part (4) for planting seedlings in the field is provided on the rear side of the traveling vehicle body (2), a control unit (33) is provided on the traveling vehicle body (2), and a support machine frame ( 49) a plurality of spare seedling placement members (38a, 38b, 38c) for placing a seedling box and a plurality of movable link members for rotatably connecting the plurality of preliminary seedling placement members (38a, 38b, 38c). (39a, 39b, 39c) are attached, and a plurality of preliminary seedling placement members (38a, 38b, 38c) are arranged in the front-rear direction and a plurality of preliminary seedlings by rotating the movable link members (39a, 39b, 39c). In the seedling transplanting machine configured so that the placing members (38a, 38b, 38c) can be switched to a stacked state in which they are arranged in the vertical direction,
Provided in the support machine frame (49) is a switching drive device (70) between the expanded state and the stacked state of a plurality of preliminary seedling placement members (38a, 38b, 38c),
The switching drive device (70) is rotated by the rotating member (70a), the switching actuator (71) and the switching actuator (71) to rotate the rotating member (70a), and the rotating member (70a) A drive switching mechanism (83) that stops the switching actuator (71) when rotation becomes impossible is provided, and a switching operation member (73) that switches between operation and stop of the switching drive device (70) is provided in the control section (33). ,
If the switching actuator (71) is a forward / reverse motor, and the time required from when the switching operation member (73) is operated until the switching actuator (71) stops is less than a predetermined time, the switching actuator (71) is set. If the time required until the switching actuator (71) is stopped after the switching operation member (73) is operated after being reversely rotated over time is not reversed, the switching actuator (71) is not reversely rotated. seedling transplanter you comprising the control device (100) having a control arrangement for stopping the. A planting part (4) for planting seedlings in the field is provided on the rear side of the traveling vehicle body (2), a control unit (33) is provided on the traveling vehicle body (2), and a support machine frame ( 49) a plurality of spare seedling placement members (38a, 38b, 38c) for placing a seedling box and a plurality of movable link members for rotatably connecting the plurality of preliminary seedling placement members (38a, 38b, 38c). (39a, 39b, 39c) are attached, and a plurality of preliminary seedling placement members (38a, 38b, 38c) are arranged in the front-rear direction and a plurality of preliminary seedlings by rotating the movable link members (39a, 39b, 39c). In the seedling transplanting machine configured so that the placing members (38a, 38b, 38c) can be switched to a stacked state in which they are arranged in the vertical direction,
Provided in the support machine frame (49) is a switching drive device (70) between the expanded state and the stacked state of a plurality of preliminary seedling placement members (38a, 38b, 38c),
The switching drive device (70) is rotated by the rotating member (70a), the switching actuator (71) and the switching actuator (71) to rotate the rotating member (70a), and the rotating member (70a) A drive switching mechanism (83) that stops the switching actuator (71) when rotation becomes impossible is provided, and a switching operation member (73) that switches between operation and stop of the switching drive device (70) is provided in the control section (33). ,
A seedling reduction detection member (94) for detecting a decrease in seedling is provided at the lower portion of the planting part (4), and a steering sensor (96) for detecting turning at the end of the field is provided in the steering wheel operation part. A counter (99) for counting the number of turning operations (x) of (96), a reverse detection member (97) for detecting the reverse of the traveling vehicle body (2), and a seedling reduction detection member (94). In the state where the decrease of the seedling is detected, and the reverse detection member (97) is in the traveling vehicle body (2) while the number of turning operations (x) counted by the counter (99) has reached the predetermined number of rotations. Upon detecting the reverse of seedling transplantation machine you comprising the control device (100) having a control arrangement for operating the switching actuator (71) of the switching drive (83). A planting part (4) for planting seedlings in the field is provided on the rear side of the traveling vehicle body (2), a control unit (33) is provided on the traveling vehicle body (2), and a support machine frame ( 49) a plurality of spare seedling placement members (38a, 38b, 38c) for placing a seedling box and a plurality of movable link members for rotatably connecting the plurality of preliminary seedling placement members (38a, 38b, 38c). (39a, 39b, 39c) are attached, and a plurality of preliminary seedling placement members (38a, 38b, 38c) are arranged in the front-rear direction and a plurality of preliminary seedlings by rotating the movable link members (39a, 39b, 39c). In the seedling transplanting machine configured so that the placing members (38a, 38b, 38c) can be switched to a stacked state in which they are arranged in the vertical direction,
Provided in the support machine frame (49) is a switching drive device (70) between the expanded state and the stacked state of a plurality of preliminary seedling placement members (38a, 38b, 38c),
The switching drive device (70) is rotated by the rotating member (70a), the switching actuator (71) and the switching actuator (71) to rotate the rotating member (70a), and the rotating member (70a) A drive switching mechanism (83) that stops the switching actuator (71) when rotation becomes impossible is provided, and a switching operation member (73) that switches between operation and stop of the switching drive device (70) is provided in the control section (33). ,
In a facility that is not a seedling transplanter including a light truck, a distance information receiving member (102) is provided in the seedling storage part, a distance information transmitting member (103) is provided in the traveling vehicle body (2), and the traveling operation lever (45) is operated. A neutral detection member (105) for detecting that the position is in the “neutral” position is provided, and it is detected that the distance information receiving member (102) and the distance information transmission member (103) are within a predetermined distance. When (105) detects the "neutral", the drive switching mechanism (83) seedling transplanter you characterized by comprising automatic control device having a control arrangement for operating the (100) a switching actuator (71) of . An elevating link mechanism (3) for raising and lowering the planting part (4) relative to the traveling vehicle body (2) is provided, and is turned on when the elevating link mechanism (3) moves to a certain height, and the elevating link mechanism (3) When the raising / lowering link mechanism (3) is provided with the seedling replenishment detection member (95) for stopping the raising or lowering of the two, and the switching operation device (73) of the plurality of preliminary seedling placing members (38a, 38b, 38c) is operated, The control device (100) having a control configuration for raising or lowering the planting part (4) until the seedling replenishment detecting member (95) is turned on, according to any one of claims 1 to 4, The seedling transplanter according to item 1 . The switching drive device (70) is provided with a switching unit cover (70b) that houses a rotating member (70a), a switching actuator (71), and a drive switching mechanism (83), and the switching actuator (71) is an electric motor, and the switching An auxiliary plate (79) provided with a rotating shaft (81) of the rotating member (70a) and a motor rotating shaft (83a) of the drive switching mechanism (83) is attached to the section cover (70b), and the switching section cover is mounted. over (70b) and the auxiliary plate (79), fitted with a holding plate (80) which is made of metal, according to claim 1, characterized in that is brought into close contact with the holding plate (80) to the electric motor (71) The seedling transplanter according to any one of claims 5 to 6.

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