JP2012205504A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter having a reserve seedling placing part which efficiently performs to make a developed state in which two or more reserve seedling trays are arranged almost linearly in a front-back direction and to make a laminate state in which the reserve seedling trays vertically overlap each other in planar view, and can surely keep each state in the developed state and the laminate state.SOLUTION: The switching between the developed state in which two or more reserve seedling members 38a, 38b, and 38c are lined in the front-back direction and the laminate state in which the reserve seedling members are lined vertically, by the turn of two or more movement link members 39a, 39b, and 39c, is performed by turning a turn gear 70a by a motor 71, and the reserve seedling placing members 38a, 38b, and 38c can be automatically set in the developed state and the laminate state by the movement link members 39a, 39b, and 39c touching stop plates 73a1 and 73a2 provided in the right place of the reserve seedling member 38.

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.

In a seedling transplanter equipped with a seedling planting device at the rear part of the machine body, a seedling transplanter having a spare seedling mounting part composed of a plurality of spare seedling platforms on the side of the machine body is known.
In the following Patent Document 1, a plurality of preliminary seedling platforms are vertically stacked and overlapped in plan view, and a plurality of preliminary seedling platforms are deployed in a substantially straight line in the front-rear direction. In addition, a seedling transplanter configured to switch the plurality of preliminary seedling platforms 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 1 can easily and quickly switch the state of the plurality of preliminary seedling platforms, and can improve the switching workability of the state of the plurality of preliminary seedling platforms compared to the prior art.

JP 2009-232809 A

In the seedling transplanting machine having the configuration described in Patent Document 1, it is necessary to return to replenishing seedlings many times when the number of planting sections is larger than the number of seedlings that can be accommodated by the spare seedling stage or the field is wide. In some cases, it takes a lot of time to replenish seedlings, resulting in a problem that work efficiency decreases.
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, the problem of the present invention is to automatically switch between a deployment state in which a plurality of preliminary seedling platforms are arranged in a substantially straight line in the front-rear direction and a stacking state overlapping in a vertical direction in plan view, and An object of the present invention is to provide a seedling transplanter equipped with a preliminary seedling placement section that can reliably hold each state in the expanded state and the stacked state.

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 spare seedling placement members (preliminary seedling placement platforms) (38a, 38b, 38c) for placing the seedling box (68) on the support machine frame (49) provided in (2) and the plurality of preliminary seedling placement members ( 38a, 38b, and 38c) are attached to a plurality of movable link members (39a, 39b, and 39c), and a plurality of preliminary seedling placing members are provided by rotating the movable link members (39a, 39b, and 39c). In a seedling transplanter configured to be switchable between an unfolded state in which (38a, 38b, 38c) are arranged in the front-rear direction and a stacked state in which a plurality of spare seedling placement members (38a, 38b, 38c) are arranged in the vertical direction, a plurality of spare seedlings Mounting member (38a 38b, 38c) are provided in the support frame (49), and the switching device (70) is provided with a rotating member (rotating gear) (70a) and a switching actuator (electric motor). ) (71), a switching operation member (switch) (73) for switching the operation and stop of the switching device (70) is provided in the control section (33), and a plurality of spare seedling placement members (38a, 38b, 38c) are provided. A plurality of stop members (stopper plates) (73a1, 73a2) for stopping the moving link members (39a, 39b, 39c) in the unfolded state or the loaded state are any of the preliminary seedling placement members (38a, 38b, 38c). When the moving link member (39a, 39b, 39c) continues to contact the stop member (73a1, 73a2) and a predetermined load is applied, the switching actuator ( 1) is a seedling transplantation machine provided with a control device (100) having a control structure to stop.

  In the invention according to claim 2, the first stop member (73a1) for stopping the plurality of moving link members (39a, 39b, 39c) in the expanded state of the plurality of preliminary seedling placing members (38a, 38b, 38c) is provided. A second seedling placement member (38a, 38b, 38c) is disposed on a central stage seedling placement stand (38b) among the plurality of spare seedling placement members (38a, 38b, 38c), and the moving link members (39a, 39b, 39c) are stopped in the loaded state. The seedling transplanter according to claim 1, wherein the stop member (73a2) is arranged on the preliminary seedling placement member (38c) at a lower stage than the preliminary seedling placement member (38b) provided with the first stop member (73a1).

  In the invention according to claim 3, the plurality of preliminary seedling placement members (38a, 38b, 38c) are composed of three preliminary seedling placement members (38a, 38b, 38c), and the plurality of moving link members (39a, 39b, 39c). Consists of three moving link members (39a, 39b, 39c), and the three moving link members (39a, 39b, 39c) are provided with three spare seedling placing members (38a, 38b, 38c) provided at equal intervals. The movable link member (39b), the two preliminary seedling placing members (38a, 38b) and the two preliminary seedling placing members (38b, 38c) are respectively connected to the auxiliary moving link members (39a, 39c). The seedling transplant according to claim 1, wherein stop members (73a1, 73a2) are respectively arranged on the two preliminary seedling placement members (38b, 38c) positioned in the lower stage or the front row and the rear row, respectively. It is.

  In the invention according to claim 4, the cover plate (78) is mounted with the auxiliary plate (79) with the rotation member (70a) and the rotation member (70a) being out of phase, and the cover plate (78) and the auxiliary plate are attached. A switching device (70) comprising: a holding plate (80) mounted over (79) and a switching actuator (71) for rotating the rotating member (70a) mounted on the holding plate (80). It is a seedling transplanting machine given in any 1 paragraph of 1-3.

 The invention according to claim 5 covers the main cover (83) covering the rotating member (70a) and the switching actuator (71) as a guide cover (88) covering the rotating member (70a) and the switching actuator (71). The auxiliary cover (82) is divided and provided, the main cover (83) is connected to the cover plate (78), and the auxiliary cover (82) is connected to the main cover (83) and the cover plate (78). This is a seedling transplanter.

  According to a sixth aspect of the present invention, the switching actuator (71) is an electric motor, and a bimetal (85) is provided that is deformed and stops the energized state when a load is applied to the electric motor (71) and heat of a predetermined temperature or more is generated. The seedling transplanter according to any one of claims 1 to 5.

  According to the seventh aspect of the present invention, the spare seedling placement member (38b, 38c) other than the preliminary seedling placement member (38a) disposed at the tip in the expanded state among the plurality of preliminary seedling placement members (38a, 38b, 38c). ) Are formed at the front end of each of the front side protrusions (38b1, 38c1), and the front side protrusions (38b1, 38c1) are formed with rear-upward inclined surfaces. 38c1) is provided with a conveyance auxiliary rotator (conveyance auxiliary rollers) (47b, 47c) for assisting the conveyance of seedlings, and the upper surface of the conveyance auxiliary rotator (47b, 47c) is a front protrusion (38b1, 38c1). The seedling transplanting machine according to any one of claims 1 to 6, wherein the seedling transplanting machine protrudes upward from the upper part of the rear upward inclined surface.

According to the first aspect of the present invention, when the switching device (70) is operated, the switching actuator (71) rotates the rotating member (70a), and the plurality of preliminary seedling placing members (38a, 38b, 38c). Can be automatically switched between the “deployed form” and the “stored form”, so that the operator does not have to switch manually and the work efficiency is improved.
The switching actuator (71) automatically stops when the plurality of moving link members (39a, 39b, 39c) continue to come into contact with the stop members (73a1, 73a2). 71), it is not necessary to perform the stop operation, so that it is possible to concentrate on other operations and work efficiency is improved.

Further, when the plurality of preliminary seedling placement members (38a, 38b, 38c) are in the expanded state or the loaded state, any of the plurality of moving link members (39a, 39b, 39c) comes into contact with the stop members (73a1, 73a2). Therefore, it is possible to prevent the plurality of moving link members (39a, 39b, 39c) from moving due to the vibration of the fuselage and swinging the preliminary seedling placing members (38a, 38b, 38c) back and forth, preventing the seedling from falling, The wear of the preliminary seedling placement members (38a, 38b, 38c) and the surrounding constituent members due to shaking is reduced.
Furthermore, since it is possible to omit components and circuits such as a switch for stopping the switching actuator (71) in the unfolded state or the loaded state, the number of parts is greatly reduced and the configuration is simplified.
In this way, it is not necessary to provide a special device for stopping the switching actuator (71) when the unfolded state and the loaded state other than the stop member (73a1, 73a2), and the equipment cost can be saved.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the first stop member (73a1) for stopping the plurality of moving link members (39a, 39b, 39c) in the deployed state is provided. A second stop member (73a2) that stops the moving link members (39a, 39b, 39c) in the loaded state is placed on the preliminary seedling stage (38b) in the center stage, and the first stop member (73a1) By disposing the spare seedling placement member (38c) below the provided preliminary seedling placement member (38b), the plurality of preliminary seedling placement members (38a, 38b, 38c) can be stopped with a simple configuration.
Since the plurality of moving link members (39a, 39b, 39c) come into contact with the stopping members (73a1, 73a2) and stop, the moving link members (39a, 39b, 39c) are moved by the vibration of the fuselage and are reserved. The seedling placing member (38a, 38b, 38c) is prevented from shaking back and forth, the seedling is prevented from falling, and the wear of the constituent members of the preliminary seedling placing member (38a, 38b, 38c) due to the shaking is reduced. .
Furthermore, since the load is easily applied to the switching actuator (71) due to the contact between the moving link members (39a, 39b, 39c) and the stop members (73a1, 73a2), the switching actuator (71) is stopped more quickly and power consumption is increased. The amount is reduced.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1, the three moving link members (39a, 39b, 39c) are replaced with one main moving link member (39b) and two sub moving links. By arranging the stop members (73a1, 73a2) on the two preliminary seedling placement members (38b, 38c), which are configured by the members (39a, 39c) and located respectively in the upper and lower stages or in the front and rear rows, When the seedling placing members (38a, 38b, 38c) are in the unfolded state, the movable link members (39a, 39b, 39c) are locked when the main link members (39b) come into contact with the stop members (73a1, 73a2), respectively. Therefore, the movement link member (39a, 39b, 39c) may move due to the vibration of the fuselage, and the preliminary seedling placement member (38a, 38b, 38c) may swing back and forth. Sealed, with falling seedlings is prevented, the preliminary seedling member by shaking (38a, 38b, 38c) and the wear of the components around it are reduced.

  When the three preliminary seedling placing members (38a, 38b, 38c) are switched to the loaded state, the main moving link member (39b) and the auxiliary moving link members (39a, 39c) sandwich the stop members (73a1, 73a2), respectively. As a result, the three moving link members (39a, 39b, 39c) are locked, and the moving link members (39a, 39b, 39c) are moved by the vibration of the fuselage to move the preliminary seedling placement members (38a, 38b, 38c) is prevented from swinging back and forth, the fall of the seedling is prevented, and wear of the preliminary seedling placing members (38a, 38b, 38c) and the surrounding constituent members due to the swing is reduced.

According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the holding plate (80) is provided across the cover plate (78) and the auxiliary plate (79). By providing the switching actuator (71) on the holding plate (80), when the moving link members (39a, 39b, 39c) contact the stop members (73a1, 73a2) and a load is applied, the switching actuator (71 ) Is applied to the holding plate (80) and the cover plate (78) receives the force, so that the holding plate (80) is hardly bent.
Further, since the switching actuator (71) is prevented from escaping, the switching actuator (71) and the rotating member (70a) are prevented from being separated from each other, so that the adjustment work of the switching device (70) is omitted. , Labor of workers is reduced.

  According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the invention, the guide cover (88) covers the main cover (83) covering the rotating member (70a) and the auxiliary covering (71). When the auxiliary cover (83) is removed by dividing the cover (82) and attaching the auxiliary cover (82) across the main cover (83) and the cover plate (78), the switching actuator (71) and the holding plate ( 80) is exposed, adjustment and cleaning can be performed without removing all of the guide cover (88), and maintenance is improved.

  According to the invention of claim 6, in addition to the effect of the invention of claim 1, the switching actuator (71) is an electric motor, heat is generated by overload, and the bimetal (85) is deformed when the temperature exceeds a predetermined temperature. Thus, it is not necessary to stop the electric motor when the plurality of spare seedling placement members (38a, 38b, 38c) are in the expanded state or the loaded state, and the work efficiency is thus reduced. Is improved more than before.

  According to the seventh aspect of the invention, in addition to the effect of the invention according to any one of the first to sixth aspects, the preliminary seedling placement member (38b) other than the preliminary seedling placement member (38a) disposed at the tip. , 38c) are formed with front protrusions (38b1, 38c1) projecting forward, and are rotated to the front protrusions (38b1, 38c1) to assist in transporting seedlings. By arranging the (conveyance auxiliary roller) (47b, 47c), when the operator pushes and moves the seedling loaded on the front side of the preliminary seedling placement member (38a, 38b, 38c), the force applied to the movement of the seedling is reduced. Therefore, the labor of the operator is reduced, and the upper surface of the conveyance auxiliary rotating body (conveyance auxiliary roller) (47b, 47c) is positioned above the front protrusion (38b1, 38c1). Co rotating body (47b, 47c) acts reliably.

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 side view of the case where the reserve seedling platform of the riding type rice transplanter of FIG. 1 is arranged on the same plane (deployed state). FIG. 3 is a simplified side view when the spare seedling platform of the riding type rice transplanter of FIG. 1 is arranged on the same plane (deployed 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 an operation control block diagram of the reserve seedling stand of the riding type rice transplanter of FIG. It is the side surface simplification figure which shows the lamination | stacking state (FIG. 9 (a)) and expansion | deployment state (FIG.9 (b)) of the reserve seedling stand of the riding type rice transplanter of FIG. It is a top view (Drawing 10 (a)) of the change drive device of the reserve seedling stand of the riding type rice transplanter of Drawing 1, and the internal structure figure (Drawing 10 (b)). It is a top view of the switching drive device of the reserve seedling stand of the riding type rice transplanter of FIG. Side view (FIGS. 12 (a) and 12 (b)) and plan view (FIG. 12 (c)) and an enlarged view of the front protrusion of the spare seedling platform of the riding type rice transplanter of FIG. (FIG. 12D). It is the top view ((FIG.13 (a)) and side view ((FIG.13 (b))) of the reserve seedling stand of the riding type rice transplanter of FIG. They are the perspective view (FIG. 14 (a)) and the partial top view (FIG.14 (b)) of the reserve seedling stand of the riding type rice transplanter of FIG. The side view (FIGS. 15 (a), 15 (b)) and the developed side view (FIG. 15 (c)) of the four-stage reserve seedling platform of the riding type rice transplanter of FIG. It is a side view (Drawing 15 (d)) of a four-stage reserve seedling stand.

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,. Guided to a guide (not shown),... And dropped into a fertilization structure 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 fertilizer guide,. ing. 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 stages, and a simplified side view is shown. As shown in FIG. Moreover, the side view at the time of arrange | positioning the 1st reserve seedling stand 38a, the 2nd preliminary seedling stand 38b, and the 3rd preliminary seedling stand 38c on the same plane is shown in FIG. 5, and a side simplified view is shown in FIG.

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 members 37a, 37b, and 37c by welding. And the support piece (not shown) of the moving link members 39a, 39b, 39c is inserted into the insertion part (not shown) of the rotating shafts 39a2, 39b1, 39b2, 39c1 welded to the support frames 37a, 37b, 37c. Insert and install.

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. 5, the pivot fulcrum 39b3 is located below the pivot shaft 37b1 on the side surface of the central portion of the second preliminary seedling stage 38b, so that it is in front of the position shown in FIG. A second preliminary seedling table 38b is arranged on the side. At this time, when the third moving link member 39c also rotates from the state shown in FIG. 3 around the rotation fulcrum 39c3 to the state shown in FIG. It is arranged in front of the position shown.

  Accordingly, as shown in the plan view of FIG. 7, when the first preliminary seedling stage 38a, the second preliminary seedling stage 38b, and the third preliminary seedling stage 38c are developed on substantially the same plane, a wide seedling box 68 or the like When these three preliminary seedling platforms 38a, 38b, 38c are moved more forward than before, the front end of the machine body can be projected out of the field. For example, it becomes easy to load seedlings on the spare seedling platforms 38a, 38b, and 38c from a truck or the like at the shore.

  Further, as shown in the plan view of FIG. 7, a pair of front projecting portions 38a1, 38b1, 38c1 projecting forward are provided at both front end portions of the first, second and third preliminary seedling platforms 38a, 38b, 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 68 loaded on the preliminary seedling platforms 38a, 38b, and 38c can be smoothly moved to the rear side, and the working efficiency is improved as compared with the prior art.

  As shown in the side views of FIGS. 3 and 5, the front protrusions 38a1, 38b1, and 38c1 of the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are formed in a rear upward inclined shape (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 the seedling box 68 (see FIG. 12) or the like is moved from the 38a, 38b to the rear spare seedling platforms 38b, 38c, the seedling box 68 can be placed on the rear rising slope and moved rearward. This makes it easier to move and improves work efficiency. 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 it is possible to prevent the box 68 and the like from moving back and forth, the seedling box 68 and the like are prevented from falling downward from the respective reserve seedling platforms 38a, 38b and 38c, and it is not necessary to pick up the dropped seedling box 68 and the like. , Work efficiency is improved than before.

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, 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. The loading work such as 68 becomes easy, and the work efficiency is improved as compared with the conventional one.

  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 the seedling box 68 and the like placed on the front protrusions 38a1, 38b1, 38c1 having the rear rising slope are smoothly moved, the work efficiency is higher than the conventional one. improves.

In addition, the first, second, and third partition walls 38a4, 38b4 that prevent the seedling box 68 from falling at a total of four locations on the front and rear sides of the first, second, and third preliminary seedling platforms 38a, 38b, and 38c. , 38c4 are 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 stacked state where the preliminary seedling platforms 38a, 38b, and 38c are vertically aligned. This switching can be performed by the switching drive device 70 that is driven by the electric motor 71. The switching drive device 70 includes a disk gear, a semicircle, or a drive gear 71a attached to a rotation shaft (not shown) of the electric motor 71 and a rotation shaft 39b3 of a moving link member 39b meshing with the drive gear 71a. A half-moon shaped switching gear 70a is provided.

  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. 8 is a block diagram showing the operation control of the preliminary seedling platforms 38a, 38b, and 38c.
A switch 73 (which may be a button or a lever) (FIGS. 1 and 2) 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. Further, as shown in the simplified diagrams of FIGS. 4 and 6, when the standby seedling platforms 38a, 38b, and 38c are rotated by the operation of the changeover switch 73 to the expanded state or the stacked state, these preliminary seedlings are provided. Stop plates 73a1 and 73a2 for stopping the platforms 38a, 38b and 38c were provided on the side surfaces of the third preliminary seedling platform 38b and the second preliminary seedling platform 38c, respectively. When the preliminary seedling platforms 38a, 38b, and 38c are in a stacked state, the stop plate 73a1 hits the stop plate 73a1 and overloads the electric motor 71 to generate an excessive voltage or overheat. The stop plate 73a2 hits the second moving link member 39b when the preliminary seedling stage 38a, 38b, 38c is in the expanded state, overloads the electric motor 71 and generates an excessive voltage. It is a member that stops the operation by heating or overheating.

  Further, if the stop plates 73a1 and 73a2 continue to contact the second moving link member 39b, the load (the second moving link member 39b contacts the stop plate 73a1 or 73a2 and is driven even though it cannot be rotated any more. This is a load of the electric motor 71 that is continued, and an energization path using the bimetal 85 is arranged inside the electric motor 71, and the bimetal 85 is bent (retracted) when heated by the load or an excessive voltage is applied. In this configuration, the energization is stopped and the rotation of the electric motor 71 is stopped.In the case of the voltage type, the operation can be restarted immediately after the stop. The electric motor 71 is stopped until it returns, and the operator does not have to stop the electric motor 71. Can concentrate, work efficiency can be improved more than ever.

Further, when the preliminary seedling stage 38a, 38b, 38c is in the expanded state or the loaded state, the second moving link member 39b comes into contact with the stop plate 73a1 or 73a2, so that the second moving link member 39b is caused by vibration of the machine body. The first, second and third preliminary seedling platforms 38a, 38b and 38c are prevented from shaking back and forth, preventing the seedlings from falling and the first, second and third preliminary seedlings due to the shaking. The wear of the mounting bases 38a, 38b, 38c and other components for placing the preliminary seedling is reduced.
Further, when the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are in an expanded state or a loaded state, components such as a switch for stopping the electric motor 71 and a circuit can be omitted. The number of parts is greatly reduced and the configuration is simplified.

When a conventional limit switch is used, a cable or a circuit that sends a stop signal simultaneously with the movement of the moving link members 39b and 39c to the switch is required, so that the number of parts is large and the structure is complicated. In addition, since a limit switch that stops in the unfolded state and a limit switch that stops in the loaded state are necessary, the number of parts is further increased and the structure is complicated.
In contrast, in the present invention, when the bimetal 85 in the electric motor 71 is retracted (bent) due to overvoltage or overheating, the electric motor 71 automatically stops, so that a path for transmitting a stop signal is not required. Since it is only necessary to provide a switch for operating the switch in the unfolded state and the loaded state and connect the switch and the electric motor with a cable, the number of parts can be reduced and the structure can be simplified.

  Further, as shown in FIG. 5, when the first, second and third preliminary seedling platforms 38a, 38b and 38c are in the unfolded state, the first, second and third moving link members 39a, 39b and 39c are used. A stop plate 73a1 for stopping the movement of the first preparatory seedling table 38b is arranged on the second preliminary seedling table 38b in the center stage, and as shown in FIG. 3, the first, second, and third preliminary seedling table 38a, 38c, 38c are loaded. Since the stop plate 73a2 for stopping the first, second, and third moving link members 39a, 39b, and 39c in the state is disposed on the third preliminary seedling stage 38c in the lower stage, at the position where the unfolded state or the loaded state is reached. Since the first, second, and third moving link members 39a, 39b, and 39c are in contact with each other, a simple configuration can be achieved.

Since the first, second and third moving link members 39a, 39b and 39c come into contact with the stop plates 73a1 and 73a2 and stop, the first, second and third moving link members 39a are vibrated by the vibration of the airframe. , 39b, 39c are moved to prevent the first, second and third preliminary seedling platforms 38a, 38b, 38c from shaking back and forth, preventing the seedling from falling, and the first, second and second The wear of the third preliminary seedling stage 38a, 38b, 38c and the members around it is reduced.
Further, since the load is easily applied to the electric motor 71 due to the contact between the first, second, and third moving link members 39a, 39b, and 39c and the stop plates 73a1 and 73a2, the electric motor 71 is stopped more quickly and the electric power is consumed. The amount is reduced.

Further, FIGS. 9 (a) and 9 (b) show simplified views of the loading state and the unfolding state of the first, second, and third preliminary seedling platforms 38a, 38b, and 38c according to another embodiment of the present invention. Show. Stop plates 73a1 and 73a2 in this case are provided on the front and rear side surfaces of the second preliminary seedling stage 38b, respectively.
In this case, when the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are loaded, the upper and lower ends of the second moving link member 39b abut against the stop plates 73a1 and 73a2, respectively. Since the first, second, and third moving link members 39a, 39b, and 39c are stopped, the first, second, and third moving link members 39a, 39b, and 39c are moved by the vibration of the fuselage, and the first and second moving link members 39a, 39b, and 39c are moved. The second and third preliminary seedling platforms 38a, 38b, 38c are prevented from shaking back and forth, so that the seedlings are prevented from falling, and the first, second, and third preliminary seedling platforms 38a, 38b, Wear of components including 38c is reduced.

  When the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are switched from the loaded state to the unfolded state, as shown in partially enlarged views in the round frames A and B of FIG. Since the two moving link members 39b and the first and third moving link members 39a and 39c sandwich the stop plates 73a1 and 73a2, respectively, the first, second and third moving link members 39a, 39b and 39c are locked. The first, second, and third moving link members 39a, 39b, and 39c are prevented from moving back and forth due to vibrations of the airframe, preventing the seedling from falling and preventing the seedling from being shaken. The wear of the constituent members is reduced.

  As shown in the plan view of the switching drive device 70 in FIG. 10A and the internal structure diagram of the switching drive device 70 in FIG. The auxiliary plate 79 provided with the rotation shaft 71a1 of the drive gear 71a of the electric motor 71 is shifted in phase with the rotation shaft 81 of the switching gear 70a for moving the second and third moving link members 39a, 39b, 39c. To do. A configuration is employed in which a motor mounting plate (holding plate) 80 is mounted across the cover plate 78 and the auxiliary plate 79, and an electric motor 71 for rotating the rotating gear 70a is mounted on the holding plate 80. .

In the switching drive device 70 configured as described above, the holding plate 80 is provided across the cover plate 78 and the auxiliary plate 79, and the electric motor 71 is mounted on the holding plate 80. Therefore, the first, second, and third movements are performed. When the link members 39a, 39b, 39c are in 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 78. It becomes difficult to bend.
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.

As shown in the plan view of the switching drive device for the first, second, and third preliminary seedling platforms 38a, 38b, and 38c in FIG. 11, the switching drive device 70 is provided around the side surface of the second preliminary seedling platform 38b. A guide cover 88 is provided, and the guide cover 88 is divided into a main cover 83 that covers the drive gear 71a of the electric motor 71 and an auxiliary cover 82 that covers the electric motor 71. The main cover 83 is connected to the cover plate 78, and the auxiliary cover is provided. 82 is connected to the main cover 83 and the cover plate 78.
With the configuration shown in FIG. 11, when the auxiliary cover 82 is removed, the electric motor 71 and the holding plate 80 are exposed. Therefore, adjustment and cleaning can be performed without removing the entire guide cover 88 every time maintenance is performed. improves.

  The electric motor 71 may be provided with a bimetal 85 (shown only in FIG. 8) that is deformed and stops the energized state when a load is applied and heat of a predetermined temperature or higher is generated. In this way, if the electric motor 71 is overloaded and overvoltage is generated or overheating occurs and the temperature exceeds a predetermined temperature, the bimetal 85 is deformed to stop energization. When the platforms 38a, 38b, and 38c are in the unfolded state or the loaded state, an overvoltage is applied to the electric motor 71, and the electric motor 71 is stopped when it is overheated.

  12A and 12B are a side view, a plan view of FIG. 12C, and an enlarged view of a front protrusion of the preliminary seedling table of FIG. 12D. As described above, the front end portions of the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are formed with front protrusion portions 38b1 and 38c1 that protrude toward the front, respectively. 38b1 and 38c1 are formed with rear-upward inclined surfaces, and transport auxiliary rollers 47b and 47c are arranged on the front protrusions 38b1 and 38c1 to assist the transport of seedlings. In addition, the upper surfaces of the conveyance auxiliary rollers 47b and 47c are configured to protrude upward from the upper portions of the rear upward inclined surfaces of the front protrusions 38b1 and 38c1.

Thus, by providing the conveyance auxiliary rollers 47b and 47c on the front protrusions 38b1 and 38c1, the operator pushes and moves the seedling box 68 loaded on the front side of the second and third preliminary seedling platforms 38b and 38c. In doing so, the force required to move the seedling box 68 can be reduced, so that the labor of the operator is reduced.
The upper surfaces of the conveyance auxiliary rollers 47b and 47c are positioned above the front protrusions 38b1 and 38c1, so that the auxiliary rotation rollers 47b and 47c act reliably.

Further, as shown in the plan view of FIG. 13 (a) and the side view of FIG. 13 (b), the first, second and third preliminary seedling platforms 38a, 38b and 38c (hereinafter referred to as the preliminary seedling platform 38). A strain or weight sensor 84 is provided on the front side of (described below) so that it can be detected whether or not the seedling box 68 is on the way between two adjacent preliminary seedling platforms 38. In this way, when the strain or weight sensor 84 detects that the seedling box 68 is on the way between two adjacent preliminary seedling platforms 38, 38, the operation of the electric motor 71 is stopped to stop the preliminary seedling. Safety is ensured by preventing the platform 38 from being unfolded.
Thereafter, the seedling box 68 is repositioned in the center of the preliminary seedling stage 38 and the electric motor 71 is operated again to bring the three preliminary seedling bases 38 into the deployed state.

As shown in FIG. 1, the preliminary seedling stage 38 is supported on the machine body by a support frame 49. Then, as shown in the perspective view of FIG. 14A and the partial plan view of FIG. 14B, the preliminary seedling stage 38 that can be provided to the seedling transplanter of this embodiment is horizontally rotated by the support frame 49. As a support shaft.
The rotation mechanism of the preliminary seedling table 38 is provided with two disks 86 and 87 having a horizontal surface of a support frame 49 with the preliminary seedling table 38 attached to the upper end thereof, and is supported by the upper disk 86. A plurality of holes 86 a are provided on the circumference centering on the frame body 49. A rod 89 having a lower end supported at the same radial position centered on the hole 86a of the upper disc 86 and the support frame 49 is attached to the lower disc 87 in the vertical direction. The upper disk 86 is integrally attached to the support frame 49, and the lower disk 87 and the support frame 49 are loosely fitted. A compression spring 90 is disposed around the rod 89 so as to pass through the rod 89, and is adjacent to the rod 89 in parallel with the rod 89, and includes a lower disk 87 and an upper circle. A support column 91 having both ends supported and fixed to the plate 86 is disposed, and a first manual lever 93 supported rotatably is provided at an intermediate portion of the support column 91. One end portion of the first manual lever 93 is a grip portion, and a cable 94 is connected to the other end portion. The intermediate portion of the rod 89 is rotatably supported by the first manual lever 93 at a position where the upper end portion of the spring 90 arranged around the rod 89 contacts. The upper end of the spring 90 is connected to the first manual lever 93, the lower end is connected to the lower disc 87, and the lower end of the spring 90 is supported by the disc 87.

  Therefore, when the grip portion of the first manual lever 93 is pushed down against the urging force of the spring 90, the cable connecting portion at one end of the first manual lever 93 is raised and simultaneously inserted into the hole 86a of the upper disk 86. The rod 89 comes out of the hole 86a of the upper disk 86 against the urging force of the spring 90, and the preliminary seedling stage 38 can be rotated integrally with the support frame 49.

Further, an additional manual lever 95 is provided on the front side of the preliminary seedling table 38. One end of the cable 94 is connected to the opposite end of the grip portion of the additional manual lever 95, and the cable of the first manual lever 93 is operated via the cable 94 by operating the grip portion of the additional manual lever 95. When the connecting side end moves up and down and the rod 89 is disengaged from the hole 86 a of the upper disk 86, the preliminary seedling stage 38 can be rotated around the support frame 49.
When the additional manual lever 95 is operated to the solid line position shown in FIG. 14 (b) to rotate the preliminary seedling stage 38, it becomes easy to replenish the seedlings from the cocoon or the like.

Conventionally, as a four-stage type preliminary seedling stage 38d in a seedling transplanter, as shown in FIG. 15 (d), the three-stage type preliminary seedling stage 38a, 38b, 38c described in FIG. A first stage seedling stage 38d was mounted. However, when the support legs 49x of the fourth-stage preliminary seedling platform 38d are attached to the support frame body 49, if the legs 49x of the support frame body 49 are not lengthened, the third-stage preliminary seedlings will be obtained when the layers are stacked. The seedling box 68 on the stage 38a hits the fourth stage preliminary seedling stage 38d, and the seedling may be damaged.
Therefore, even if the configurations shown in the side views of FIGS. 15 (a) to 15 (c) are adopted as the four-stage preliminary seedling platforms 38a, 38b, 38c, and 38d applicable to the seedling transplanting machine of the present embodiment. good.

  A bridge 96 is provided between the two legs of the support frame 49 that supports the preliminary seedling platforms 38a, 38b, and 38c, and the switching drive device 70 having the switching gear 70a is disposed on the bridge 96. At this time, the switching gear 70a is an egg-shaped cam 70b in a side view, the cam 70b is in the state shown in FIG. 15A during normal operation, and the cam 70b is rotated 90 degrees from the state shown in FIG. When the state shown in FIG. 15B is established, the tip of the cam 70b hits the bridge 96 and lifts the leg of the support frame 49 upward by a height (L). Thus, the height (L) is also increased between the third stage preliminary seedling stage 38a and the fourth stage preliminary seedling stage 38d, so that the seedling boxes 68 on the third stage preliminary seedling stage 38a have four levels. It is possible to prevent the seedlings from being damaged because they do not hit the preliminary seedling stage 38d.

  Further, as shown in FIG. 15C, when the three-stage type reserve seedling table 38a, 38b, 38c is in the unfolded state, the bridge 96 does not hit the cam 70b. Since it is lower than the 4th stage preliminary seedling stage 38d of the prior art shown in FIG. 15D, the operator can easily reach the 4th stage preliminary seedling stage 38d.

  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 27a First rotor 27b Second rotor 28 Fertilizer transmission mechanism 30 Engine cover 31 Seat 32 Front cover 33 Control section 34 Handle 35 Floor step 36 Rear step 37a, 37b, 37c First to third support frames 37b1 Rotating shafts 38a, 38b, 38c, 38d First to fourth preliminary seedling platforms 38a1, 38b1, 38c1 Front protrusions 38a2, 38b2, 38c2 Rear protrusions 38a3 38b3, 38c3 Receiving member 38a4, 38b4, 38c4 First to third partition walls 38a7, 38b7, 38c7 Projection 38c5 Horizontal shaft 39a, 39b, 39c First to third moving link members 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 Connection shaft 46 Lift hydraulic cylinders 47b, 47c Conveyance auxiliary rollers 49 (49a, 49b, 49x) Support machine frame 50 Transmission case 51 Seedling stand 51a Seedling Take-out port 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 Fertilization hose 65 Support frame body 65a Support roller 68 Seed box 70 Switching drive device 70a switching gear 70b cam 71 electric motor 71a electric motor drive gear 71a1 rotating shaft 73 changeover switch 73a1, 73a1 stop plate 75 drawing marker 76 groove forming body 78 cover plate 79 auxiliary plate 80 motor mounting plate (holding plate)
81 Rotating shaft 82 Auxiliary cover 83 Main cover 84 Strain or weight sensor 85 Bimetal 86, 87 Disc 88 Guide cover 89 Rod 90 Compression spring 91 Strut 93 First manual lever 94 Cable 95 Additional manual lever 96 Bridge 100 Control device

Claims (7)

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 preliminary seedling placing members (38a, 38b, 38c) for placing the seedling box (68) on the plurality of spare seedling placing members (38a, 38b, 38c), respectively A movable link member (39a, 39b, 39c) is attached, and a plurality of preliminary seedling placement members (38a, 38b, 38c) are arranged in the front-rear direction by rotating the movable link member (39a, 39b, 39c). In the seedling transplanting machine configured so that the preliminary seedling placing members (38a, 38b, 38c) can be switched to a stacked state arranged in the vertical direction,
The support machine frame (49) is provided with a switching device (70) between the expanded state and the stacked state of the plurality of preliminary seedling placing members (38a, 38b, 38c),
The switching device (70) is composed of a rotating member (70a) and a switching actuator (71), and a switching operation member (73) for switching the operation and stop of the switching device (70) is provided in the control section (33).
A plurality of stop members (73a1, 73a2) for stopping the moving link members (39a, 39b, 39c) in the unfolded state or the loaded state of the plurality of spare seedling placing members (38a, 38b, 38c) , 38b, 38c)
Provided is a control device (100) having a control configuration in which the switching actuator (71) is stopped when a predetermined load is applied while the moving link members (39a, 39b, 39c) continue to contact the stop members (73a1, 73a2). A seedling transplanter characterized by that.   The first stop member (73a1) for stopping the plurality of moving link members (39a, 39b, 39c) in the expanded state of the plurality of preliminary seedling placement members (38a, 38b, 38c) is provided with the plurality of preliminary seedling placement members (38a). , 38b, 38c), a second stop member (73a2) that is arranged on the preliminary stage seedling stand (38b) at the center stage and stops the moving link members (39a, 39b, 39c) in the loaded state, The seedling transplanter according to claim 1, wherein the seedling transplanter is arranged on a preliminary seedling placing member (38c) at a lower stage than the preliminary seedling placing member (38b) provided with one stop member (73a1). The plurality of preliminary seedling placing members (38a, 38b, 38c) are composed of three preliminary seedling placing members (38a, 38b, 38c), and the plurality of moving link members (39a, 39b, 39c) are provided with three moving link members (39a). , 39b, 39c)
The three moving link members (39a, 39b, 39c) are provided with a main moving link member (39b) in which three preliminary seedling placing members (38a, 38b, 38c) are provided at equal intervals, and two preliminary seedling placing members (38a). , 38b) and two auxiliary seedling placement members (38b, 38c), respectively, and sub-moving link members (39a, 39c),
The seedling transplanter according to claim 1, wherein stop members (73a1, 73a2) are respectively arranged on two preliminary seedling placing members (38b, 38c) positioned in the upper and lower stages or in the front and rear rows, respectively. Attaching the auxiliary plate (79) to the cover plate (78) with the rotation member (70a) and the rotation member (70a) shifted in phase,
Mount the holding plate (80) across the cover plate (78) and the auxiliary plate (79),
4. The switch device according to claim 1, further comprising a switching device having a switching actuator that turns the rotating member in the holding plate. Seedling transplanter. The guide cover (88) covering the rotating member (70a) and the switching actuator (71) is divided into a main cover (83) covering the rotating member (70a) and an auxiliary cover (82) covering the switching actuator (71). Provided
The main cover (83) is connected to the cover plate (78),
The seedling transplanter according to claim 4, wherein the auxiliary cover (82) is connected to the main cover (83) and the cover plate (78). The switching actuator (71) is an electric motor, and a bimetal (85) is arranged to be deformed and stop the energized state when a load is applied to the electric motor and heat of a predetermined temperature or more is generated. The seedling transplanter according to any one of the above. Among the plurality of spare seedling placement members (38a, 38b, 38c), the front end of the preliminary seedling placement member (38b, 38c) other than the preliminary seedling placement member (38a) disposed at the tip in the unfolded state is forward. Forming front protrusions (38b1, 38c1) protruding toward the
A rear upward inclined surface (38b11, 38c11) is formed on the front protrusion (38b1, 38c1);
A transport auxiliary rotator (47b, 47c) that rotates around the front protrusions (38b1, 38c1) and assists the transport of seedlings is disposed,
The upper surface of the auxiliary conveyance rotating body (47b, 47c) protrudes upward from the upper part of the rear upward inclined surface of the front protrusion (38b1, 38c1). The seedling transplanter according to Item.

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