JP7168016B2 - work vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a working vehicle such as a seedling transplanter having a planting device for planting seedlings in a field connected to the rear part of the vehicle body, and belongs to the technical field of agricultural machinery.

Among seedling transplanters equipped with a seedling planting device at the rear of the body, there is known a seedling transplanter equipped with a spare seedling placement section consisting of a plurality of spare seedling placement tables on the side of the body.

In Patent Document 1 below, a stacked state in which a plurality of preliminary seedling placement stands overlap each other in a plan view, and a spread state in which the plurality of preliminary seedling placement stands are deployed in a substantially straight line in the front-rear direction. discloses a seedling transplanter in which the plurality of spare seedling placement tables can be switched. In this switching mechanism, a plurality of spare seedling mounts are attached to a parallel link mechanism consisting of one long moving link member and two short moving link members. The state of the preliminary seedling placement table can be switched between a stacked state in which the seedlings are stacked on top of each other) and a state in which the seedlings are arranged substantially in a straight line in the front-rear direction (an unfolded state in which the seedlings are arranged in the horizontal direction).

Then, when the position of any one of the movable preliminary seedling placement tables among the plurality of preliminary seedling placement stands is changed from the stacking state to the unfolded state with respect to the fixed preliminary seedling placement stands, the plurality of spare seedling placement stands are in the unfolded state. , and conversely, when any one of the plurality of preliminary seedling mounting bases is changed from the unfolded state to the stacked state with respect to the fixed preliminary seedling mounting base, the plurality of preliminary seedling mounting bases are stacked. It is a configuration in which the loading table is switched to the overlapping state.

Therefore, the configuration described in Patent Document 1 can easily and quickly switch the states of the plurality of spare seedling placement tables, and can improve the operability of switching the states of the plurality of spare seedling placement stations as compared with the conventional technology.

Moreover, a case is provided in which a seedling box described in Patent Document 2 can be placed temporarily.

JP 2012-205504 A JP 2014-87276 A

A case is provided so that the seedling box can be placed thereon, and it is configured so that it will not fall from the machine due to vibration or wind.

However, it does not take into consideration the frequent loading and unloading of the seedling box into and out of the case.

In addition, although an auxiliary worker performs replenishment work from the edge of the ridge, there is a problem that it is difficult to collect the seedling boxes placed in the case from the edge of the ridge.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of conventional work vehicles, the present invention aims to provide a seedling transplanter that is provided with a case that is easy to put in and take out, and that can collect seedling boxes placed in the case even from the edge of a ridge.

In order to solve the above-mentioned problems, the first aspect of the invention provides a seedling box (68) or a plurality of spare seedling frames (38) for placing seedlings on a supporting machine frame (49) provided on a traveling vehicle body (2). In the seedling transplanter provided, a seedling box placing member (101) for placing a seedling box (68) on the plurality of spare seedling frames (38) is provided, and the seedling box placing member (101) is configured to support the spare seedling frame ( 38), the seedling box (68) mounted on the seedling box mounting member (101) provided outside or inside the machine body is supported in an oblique posture toward the outside of the machine body, and the seedling box mounting member (101) Among the constituent members, the front side and the rear side of the bottom supporting the seedling box (68) are bent upward, and the seedling box mounting members (101) are provided on each of the plurality of spare seedling frames (38), and the seedling box is provided. The seedling boxes (68) are configured such that the placing members (101) are aligned in the vertical direction of the machine body, and the seedling box placing members (101) located above are placed on the seedling box placing members (101) located below. The seedling transplanter is characterized in that it plays a role in preventing the seedlings from falling.

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According to the first aspect of the invention, the seedling box mounting member (101) for placing the seedling box (68) is provided on the side of the spare seedling frame (38), so that the seedling box (68) can be taken in and out from the outside of the machine body. Because it is easy to remove, the nursery box can be collected by field workers working on the edge of the ridge.

In addition, since the seedling box (68) is supported in an oblique posture toward the outside of the machine body, it is possible to prevent the seedling box (68) from coming into contact with the seedling box mounting member (101), thereby preventing damage to the seedling box (68). can.

In addition, since the front and rear sides of the bottom supporting the seedling box (68) are bent upward, the seedling box (68) falls from the seedling box mounting member (101) during vibration of the machine or running on a slope. can be prevented.

In addition, the seedling box (68) is prevented from slipping down during vibration of the machine body or running on a slope.

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BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the riding type rice transplanter of one Embodiment of this invention. Fig. 2 is a plan view of the riding-type rice transplanter of Fig. 1; 1. It is a side view at the time of arrange|positioning the preliminary|backup seedling mounting base of the riding type rice transplanter of FIG. FIG. 2 is a schematic side view of the riding-type rice transplanter of FIG. 1 when the preliminary seedling stands are arranged in three stages (stacked state). 1. It is a side view at the time of arrange|positioning the preliminary|backup seedling mounting stand of the riding type rice transplanter of FIG. 1 on the same plane (deployed state). FIG. 2 is a simplified side view of the riding-type rice transplanter of FIG. 1 when the preliminary seedling mounting bases are arranged on the same plane (deployed state). FIG. 2 is a plan view of the riding-type rice transplanter shown in FIG. 1 when the spare seedling mounting bases are arranged on the same plane (deployed state); FIG. 2 is an operation control block diagram of a spare seedling mounting table of the riding-type rice transplanter of FIG. 1; FIG. 9 is a simplified side view showing a stacked state (FIG. 9(a)) and an unfolded state (FIG. 9(b)) of the preliminary seedling placement table of the riding-type rice transplanter of FIG. 1; It is a top view (Fig.10 (a)) of the switching drive device of the preliminary seedling mounting stand of the riding-type rice transplanter of FIG. 1, and an internal structural diagram (FIG.10(b)) of a switching drive device. Fig. 2 is a plan view of a switching drive device of a spare seedling mounting table of the riding-type rice transplanter of Fig. 1; Side view (Fig. 12(a), Fig. 12(b)) and plan view (Fig. 12(c)) of the spare seedling placing stand of the riding type rice transplanter of Fig. 1 and an enlarged view of the front protruding part of the spare seedling placing stand (FIG. 12(d)). A side view (Fig. 13(a)) showing the entire movement state of the seedling box mounting members and a side view showing the individual movement state of the seedling box mounting members (Fig. 13(b)) The front view which shows the individual movement state of a seedling box mounting member.

Preferred embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are a side view and a plan view of a riding-type rice transplanter equipped with a fertilizing device as a granular material delivery device, which is a typical example of the seedling transplanter of the present invention. In this riding-type rice transplanter 1 with a fertilizing device, a seedling planting unit 4 is attached to the rear side of a traveling vehicle body 2 via an elevating link device 3 so as to be able to move up and down, and a main body of a fertilizing device 5 is mounted on the rear upper side of the traveling vehicle body 2. is provided. When the boarding operator faces the forward direction of the riding rice transplanter, the left and right directions are referred to as left and right, respectively, and the forward and backward directions are referred to as front and rear, respectively.

The traveling vehicle body 2 is a four-wheel drive vehicle having a pair of left and right front wheels 10, 10 as driving wheels and a pair of left and right rear wheels 11, 11 (traveling device). Front wheel final cases 13, 13 are provided on the left and right sides of the transmission case 12, and left and right front wheels protrude outward from 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 attached to the axle. A front end portion of a main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18, a rear wheel gear case 18, and a rear wheel gear case 18 are mounted around a rear wheel rolling shaft provided horizontally in the front-rear direction at the center portion of the rear end of the main frame 15. Rear wheels 11, 11 are attached to rear wheel axles projecting outward from rear wheel gear cases 18, 18.

An engine 20 is mounted on the main frame 15 , and 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 changed in speed by the transmission in the case 12, and then separated into traveling power and external power and taken out. A part of the driving power is transmitted to the front wheel final cases 13, 13 to drive the front wheels 10, 10, and the rest is transmitted to the rear wheel gear cases 18, 18 to drive the rear wheels 11, 11. The external extracting power is transmitted to the planting clutch case 25 provided at the rear portion of the traveling vehicle body 2, and then transmitted to the seedling planting section 4 by the planting transmission shaft 26. is transmitted to

An upper portion of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 containing various operating mechanisms is provided in front of the seat 31, and a steering wheel 34 for steering the front wheels 10, 10 is provided above the front cover 32. Horizontal floor steps 35 are formed on both left and right sides of the lower ends of the engine cover 30 and the front cover 32 . The floor step 35 is partly grid-shaped (see FIG. 2) so that the mud on the shoes of the worker walking on the step 35 falls onto the field. The rear part above the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

The lifting link device 3 is a parallel link mechanism, and includes one upper link 40 and a pair of left and right lower links 41 , 41 . These links 40, 41, and 41 are rotatably attached at their base sides to a rear sight gate-shaped link base frame 42 erected at the rear end of the main frame 15, and a vertical link 43 is connected to their tip sides. ing. A connecting shaft 44 rotatably supported by the seedling planting section 4 is inserted into and connected to the lower end of the vertical link 43 , and the seedling planting section 4 is connected to the seedling planting section 4 so as to roll around the connecting shaft 44 .

A lifting 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) integrally formed with the upper link 40. The upper link 40 rotates up and down by expanding and contracting with hydraulic pressure, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

The seedling planting unit 4 is composed of 6 rows of planting, and a transmission case 50 which also serves as a frame, reciprocates left and right on which the mat seedlings are placed, and feeds the seedlings one by one to the seedling outlets 51a of each row and aligns horizontally. When all the seedlings are supplied to the seedling outlets 51a, ..., the seedlings are transferred downward by the seedling feeding belts 51b, ..., the seedlings supplied to the seedling outlets 51a, ... are planted in the field. Attachment device 52, .

A center float 55 is provided in the center of the lower part of the seedling planting part 4, and side floats 56, 56 are provided on both left and right sides thereof. When the machine body is advanced with these floats 55, 56, 56 in contact with the muddy surface of the field, the floats 55, 56, 56 slide while leveling the muddy surface, and the seedling planting device 52, Seedlings are planted by …. Each float 55, 56, 56 is rotatably mounted so that the front end side moves up and down according to the unevenness of the topsoil surface of the field. (not shown), and by switching a hydraulic valve (not shown) that controls the elevation hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4, the seedling planting depth is kept constant.

The fertilizing device 5 feeds out the granular fertilizer stored in the fertilizer hopper 60 by a fixed amount by the feeding parts 61, and the fertilizer is attached to the left and right sides of the floats 55, 56, 56 by the fertilizing hoses 62. Guides (not shown), . ing. Air generated by a blower 58 driven by a blower electric motor 53 is blown into the fertilizing hoses 62 through an air chamber 59 elongated in the left-right direction, and the fertilizer in the fertilizing hoses 62 is forced by air pressure. It is designed to be transported to

A rotor 27 (a combination of the first rotor 27a and the second rotor 27b may be simply referred to as the rotor 27) is attached to the seedling planting section 4 as an example of a leveling device. The seedling mounting table 51 slides in the left-right direction using support rollers 65a of a rectangular support frame 65 that supports the entire seedling planting unit 4 in the left-right direction and the up-down direction as rails.

Also, on the left and right sides of the front portion of the traveling vehicle body 2, a pair of spare seedling mounting bases 38, 38 on which replenishment seedlings are placed are rotatable between a position projecting forward and backward of the body and a position aligned vertically. is provided.

FIG. 3 shows a side view when the first preliminary seedling placement table 38a, the second preliminary seedling placing table 38b, and the third preliminary seedling placing table 38c on one side of the machine body are arranged vertically in three stages, and a simplified side view is shown. It is shown in FIG. FIG. 5 shows a side view when the first preliminary seedling placement table 38a, second preliminary seedling placement table 38b, and third preliminary seedling placement table 38c are arranged on the same plane, and FIG. 6 shows a simplified side view thereof.

The preliminary seedling mounting table 38 is supported by a supporting machine frame 49 whose base side is arranged under 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. It consists of a preliminary seedling mounting table 38a, a second preliminary seedling mounting table 38b and a third preliminary seedling mounting table 38c.

A first support frame 37a, a second support frame 37b and a third support frame are integrally mounted on the bottom surfaces of the first preliminary seedling placement table 38a, the second preliminary seedling placement table 38b and the third preliminary seedling placement table 38c, respectively. A body 37c is attached to the central portion of the first support frame 37a and the front end of the second support frame 37b. Rotating shafts 39b1 and 39b2 at both ends of the second moving link member 39b are rotatably connected to the rear end of the first support frame 37a and the front end of the third support frame 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 central portion of the third support frame 37c.

The outer peripheral portions of the rotating shafts 39a2, 39b1, 39b2, 39c1 are attached by welding to the support frames 37a, 37b, 37c. 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 welded to the support frames 37a, 37b, and 37c. is inserted and installed.

A pivot point 37b1 is provided at substantially the center of the second moving link member 39b and substantially at the center of the second support frame 37b so that they can rotate freely.

Further, the support machine frame 49 is provided with two front and rear branch struts 49a and 49b, and the tops of the branch struts 49a and 49b reach near 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 side branch strut 49a. It is rotatable around 49a. The rotating shaft 39b3 is provided on the second moving link member 39b below the rotating fulcrum 37b1. A rotation shaft 39c3 provided near the rear end of the third moving link member 39c is provided in the vicinity of the top of the rear side branch strut 49b. It is rotatable around the side branch strut 49b. The rotating shaft 39c3 is provided on the third moving link member 39c below the rotating shaft 39c1.

The second preliminary seedling placement table 38b is not fixed to the front side branch support machine frame 49a and the rear side support machine frame 49b, which are body members, and the second moving link member 39b moves the rotation fulcrum 39b3 from the state shown in FIG. 5, the fulcrum 39b3 is located below the pivot shaft 37b1 on the side surface of the central portion of the second preliminary seedling placement table 38b. A second preliminary seedling placement table 38b is arranged on the side. At this time, when the third moving link member 39c also rotates about the rotation fulcrum 39c3 from the state shown in FIG. 3 to the state shown in FIG. It is placed closer to the front than the position shown.

Therefore, as shown in the plan view of FIG. 7, when the first preliminary seedling mounting table 38a, the second preliminary seedling mounting table 38b and the third preliminary seedling mounting table 38c are laid out on substantially the same plane, a wide seedling box 68 and the like can be obtained. When trying to obtain a mounting plane of , these three preliminary seedling mounting bases 38a, 38b, 38c can be moved closer to the front than in the conventional case, and the front end of the machine body can be protruded outside the field. For example, it becomes easier to load seedlings from a truck or the like onto the preliminary seedling loading tables 38a, 38b, and 38c at the edge of a ridge.

Further, as shown in the plan view of FIG. 7, a pair of front projections 38a1, 38b1, 38c1 projecting forward are provided at both front end portions of the first, second, and third preliminary seedling placement bases 38a, 38b, 38c. Rear projections 38a2, 38b2, and 38c2 projecting rearward are formed at the center of the rear end. Therefore, when the first, second, and third spare seedling placement tables 38a, 38b, and 38c are in the unfolded form, the rear protruding portions 38a2 and 38b2 of the spare seedling placement tables 38a and 38b located on the front side of the machine body move toward the rear side of the machine body. It is arranged at a position that overlaps the front protruding portions 38b1 and 38c1 of the positioned preliminary seedling placement bases 38b and 38c in a side view. Therefore, when the first, second and third spare seedling placement boards 38a, 38b and 38c are arranged in the longitudinal direction, the first, second and third spare seedling placing boards 38a, 38b and 38c are arranged in the longitudinal direction. Since the seedling boxes 68 can be arranged in a partially fitted state, the seedling boxes 68 to be loaded on the spare seedling placing tables 38a, 38b, 38c can be smoothly moved to the rear side, and the work efficiency is improved as compared with the conventional case.

Further, as shown in the side views of FIGS. 3 and 5, the front protrusions 38a1, 38b1, 38c1 of the first, second, and third preliminary seedling placement tables 38a, 38b, and 38c have a rear upward slope shape (rear upward slope portion). ), and the inclined top surface is higher than the seedling mounting surfaces of the preliminary seedling mounting bases 38a, 38b, and 38c. Further, the rear projections 38a2, 38b2, 38c2 of the first, second, and third preliminary seedling mounts 38a, 38b, 38c are set higher than the seedling mount surfaces of the respective preliminary seedling mounts 38a, 38b, 38c, and the front side It is the same as or lower than the upper surface of the projections 38a1, 38b1, 38c1.

Since the front projections 38a1, 38b1, and 38c1 are formed as rear upwardly inclined portions in this way, when the first, second, and third preliminary seedling mounting bases 38a, 38b, and 38c are deployed, the front auxiliary seedling mounting bases can When the seedling boxes 68 (see FIG. 12) and the like are moved from 38a, 38b to the rear spare seedling mounting bases 38b, 38c, the seedling boxes 68 can be placed on the rear ascending slope and moved backward. It becomes easy to move such as, and the work efficiency is improved than before. In addition, the top surfaces of the front projections 38a1, 38b1, 38c1 and the rear projections 38a2, 38b2, 38c2 are higher than the seedling mounting surfaces of the seedling mounting bases 38a, 38b, 38c. Seedlings placed on the preliminary seedling platforms 38a, 38b, 38c by the front protruding parts 38a1, 38b1, 38c1 and the rear protruding parts 38a2, 38b2, 38c2 when the seedling platforms 38a, 38b, 38c are in the storage mode. Since the boxes 68 and the like can be prevented from moving forward and backward, the seedling boxes 68 and the like are prevented from falling downward from the respective preliminary seedling placing tables 38a, 38b and 38c, and the need to pick up the fallen seedling boxes 68 and the like is eliminated. , work efficiency is improved than before.

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

In this way, the receiving members 38b3, 38c3 between the left and right sides of the front projections 38b1, 38c1 of the respective preliminary seedling mounts 38b, 38c receive the rear projections 38a2, 38b2 of the respective front preliminary seedling mounts 38a, 38b. Therefore, the preliminary seedling mounting bases 38a, 38b, 38c are prevented from being lowered too much, and the unfolded preliminary seedling mounting bases 38a, 38b, 38c are reliably lined up substantially on the same plane. Loading work such as 68 is facilitated, and work efficiency is improved more than before.

In addition, by providing the receiving members 38a3, 38b3, 38c3 at the bottoms of the preliminary seedling mounts 38a, 38b, 38c, the upper ends of the rear protrusions 38a2, 38b2, 38c2 are aligned with the upper ends of the front protrusions 38a1, 38b1, 38c1. Since the seedling boxes 68 and the like placed on the front protrusions 38a1, 38b1, and 38c1 having rear upward slopes can be smoothly moved, work efficiency is improved compared to the conventional art. improves.

First, second and third partition walls 38a4 and 38b4 for preventing seedling boxes 68 from falling are provided at four places in total on the left and right side surfaces of the first, second and third spare seedling mounting bases 38a, 38b and 38c. , 38c4 are arranged respectively.

Further, the pivot point 39b3 of the second moving link member 39b may be provided coaxially with the pivot shaft 37b1 of the second preliminary seedling placement table 38b. In this case, the central second preliminary seedling placement table 38b does not move back and forth.

As described above, the first, second, and third spare seedling mounts 38a, 38b, and 38c move forward and backward by the operation (rotation) of the first, second, and third moving link members 39a, 39b, and 39c. The arrangement can be switched between the unfolded state and the stacking state in which the preliminary seedling mounts 38 a , 38 b , 38 c are arranged in the vertical direction. The switching drive device 70 has a disc-shaped, semi-circular or semi-circular shape that rotates integrally with a driving gear 71a attached to a rotating shaft (not shown) of the electric motor 71 and a rotating shaft 39b3 of a moving link member 39b that meshes with the driving gear 71a. A half-moon-shaped switching gear 70a is provided.

The switching gear 70a is provided concentrically with the rotating shaft 39b3 of the moving link member 39b provided on the front side branch strut 49a, and rotates integrally with the rotating shaft 39b3. rotates, and at the same time the second moving link member 39b integral with the rotating shaft 39b3 rotates, so that the first, second, and third moving link members 39a, 39b, and 39c are in a stacked state and an unfolded state. can be switched.

FIG. 8 shows an operation control block diagram of the preliminary seedling mounts 38a, 38b and 38c.

A changeover switch 73 (which may be a button or a lever) (FIGS. 1 and 2) is provided near the seat 31 as a switching operation means for switching between the unfolded state and the stacking state of the spare seedling placing tables 38a, 38b, and 38c by the switching drive device 70. Further, as shown in the simplified diagrams of FIGS. 4 and 6, when the selector switch 73 is operated to rotate the preliminary seedling mounting bases 38a, 38b, 38c to the unfolded state or the stacked state, these preliminary seedling mounting bases 38a, 38b, 38c are rotated. Stop plates 73a1 and 73a2 for stopping the platforms 38a, 38b and 38c are provided on the side surfaces of the third preliminary seedling platform 38b and the second preliminary seedling platform 38c, respectively. When the auxiliary seedling mounts 38a, 38b, and 38c are stacked, the stop plate 73a1 is hit by the second moving link member 39b and overloads the electric motor 71 to generate excessive voltage or overheat. The stop plate 73a2 comes into contact with the second moving link member 39b when the spare seedling placement bases 38a, 38b, 38c are in the unfolded state, overloading the electric motor 71 and generating excessive voltage. It is a member that causes heat to be applied, or causes it to overheat and stop operating.

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 cannot be rotated any more is not driven). The load of the electric motor 71 that continues. Inside the electric motor 71, an energization path using a bimetal 85 is arranged. ), 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 resumed immediately after stopping.In the case of the heating type, the heat of the bimetal 85 is reduced and the motor returns to its original state. ), the electric motor 71 does not need to be stopped. improve to

In addition, when the spare seedling mounts 38a, 38b, and 38c are deployed or loaded, the second moving link member 39b contacts the stop plate 73a1 or 73a2. movement of the first, second and third preliminary seedling mounts 38a, 38b and 38c to prevent them from shaking back and forth, preventing the seedlings from dropping and also preventing the first, second and third preliminary seedlings from shaking. Wear of the mounting bases 38a, 38b, 38c and other components for preliminary seedling mounting is reduced.

Further, since the components and circuits such as the switch for stopping the electric motor 71 when the first, second, and third spare seedling platforms 38a, 38b, and 38c are deployed or loaded, it is possible to omit them. The number of parts is greatly reduced and the configuration is simplified.

When a conventional limit switch is used, a cable or a circuit is required to transmit a stop signal at the same time when the moving link members 39b and 39c contact the switch, resulting in a large number of parts and a complicated structure. Moreover, since limit switches for stopping in the unfolded state and limit switches for stopping in the loaded state were required, the number of parts increased and the structure became complicated.

In contrast, in the present invention, the electric motor 71 automatically stops when the bimetal 85 in the electric motor 71 retracts (turns) due to overvoltage or overheating. Since it is sufficient to simply 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 spare seedling placement tables 38a, 38b and 38c are in the unfolded state, the first, second and third moving link members 39a, 39b and 39c are disengaged. A stop plate 73a1 for stopping the movement of the seedlings is arranged on the second preliminary seedling placing table 38b in the center stage, and as shown in FIG. By arranging the stop plate 73a2 for stopping the first, second and third moving link members 39a, 39b and 39c in the state on the lower third preliminary seedling placing table 38c, the position where the spreading state or the loading state is achieved. Since the first, second, and third moving link members 39a, 39b, and 39c are configured to contact each other, the configuration can be simplified.

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 moved by the vibration of the machine body. , 39b, 39c are moved to prevent the first, second, and third preliminary seedling platforms 38a, 38b, and 38c from swinging back and forth, preventing the seedlings from dropping and preventing the first, second, and second seedlings from swinging. Abrasion of the third spare seedling mounts 38a, 38b, 38c and surrounding members is reduced.

Furthermore, since the contact between the first, second and third moving link members 39a, 39b and 39c and the stop plates 73a1 and 73a2 makes it easier to apply a load to the electric motor 71, the electric motor 71 can be stopped more quickly and power consumption is reduced. quantity is reduced.

9(a) and 9(b) are simplified diagrams of the loaded state and unfolded state of the first, second and third preliminary seedling placement tables 38a, 38b and 38c, which are other embodiments 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 placement table 38b, respectively.

In this case, when the first, second, and third spare seedling platforms 38a, 38b, and 38c are placed in the loading state, the upper and lower ends of the second moving link member 39b come into contact with 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 move due to the vibration of the aircraft, and the first and third moving link members 39a, 39b, and 39c The second and third preliminary seedling placement tables 38a, 38b and 38c are prevented from swinging back and forth, the seedlings are prevented from dropping, and the first, second and third preliminary seedling placement tables 38a, 38b, 38b, Wear of components including 38c is reduced.

Also, when the first, second, and third spare seedling placement bases 38a, 38b, and 38c are switched from the loaded state to the unfolded state, the first, second, and third seedling mounts 38a, 38b, and 38c are partially enlarged as shown in circular frames A and B in FIG. 9(b). Since the second moving link member 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. This prevents the first, second, and third moving link members 39a, 39b, and 39c from moving back and forth due to the vibration of the machine body, preventing the seedlings from dropping, and also preventing the seedlings from falling due to the shaking. The wear of the components of the is reduced.

As shown in the plan view of the switching drive device 70 in FIG. 10(a) and the internal structure diagram of the switching drive device 70 in FIG. , second and third moving link members 39a, 39b, and 39c. do. A motor mounting plate (holding plate) 80 is mounted over the cover plate 78 and the auxiliary plate 79, and an electric motor 71 for rotating the rotary 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 over the cover plate 78 and the auxiliary plate 79, and the holding plate 80 is mounted with the electric motor 71. When the link members 39a, 39b, and 39c come into contact with the stop plates 73a1 and 73a2 and a load is applied, a force that causes the electric motor 71 to escape is applied to the holding plate 80, and the cover plate 78 receives the force. less likely 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 increasing. is omitted, and the labor of the operator is reduced.

As shown in FIG. 11, which is a plan view of the switching drive device for the first, second, and third spare seedling placement bases 38a, 38b, and 38c, the switching drive device 70 is centered around the side surface of the second spare seedling placement base 38b. The guide cover 88 is divided into a main cover 83 covering the drive gear 71a of the electric motor 71 and an auxiliary cover 82 covering the electric motor 71. The main cover 83 is connected with the cover plate 78 to form the auxiliary cover. 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, so adjustment and cleaning can be performed without removing the entire guide cover 88 each time maintenance is performed. improves.

The electric motor 71 may be provided with a bimetal 85 (shown only in FIG. 8) which deforms 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 if overheating occurs and the temperature rises above a predetermined temperature, the bimetal 85 is deformed and the current is stopped. When the platforms 38a, 38b, and 38c are in the unfolded state or loaded state, the electric motor 71 is stopped when overvoltage is applied or overheated.

12(a) and 12(b) are side views of the preliminary seedling mounting base, the plan view of FIG. 12(c), and the enlarged view of the front protruding portion of the preliminary seedling mounting base of FIG. 12(d). Front side projections 38b1 and 38c1 projecting forward are formed at the front end portions of the first, second and third preliminary seedling placement bases 38a, 38b and 38c, respectively. The 38b1 and 38c1 are formed with a rear upwardly inclined surface, and transport assist rollers 47b and 47c for assisting the transport of the seedlings by idle rolling on the front protrusions 38b1 and 38c1 are arranged, respectively. Further, the upper surfaces of the auxiliary conveying rollers 47b and 47c are configured to protrude higher than the upper portions of the rear ascending inclined surfaces of the front protruding portions 38b1 and 38c1.

Also, the seedling box mounting member 101 shown in FIGS. 13 and 14 will be described.

A seedling box mounting member 101 for mounting a seedling box 68 is provided outside the body of the first, second and third preliminary seedling mounting tables 38a, 38b and 38c. Since this seedling box mounting member 101 is fixed to the preliminary seedling mounting table, it is configured to move together with the preliminary seedling mounting table.

In addition, the front and rear ends of the seedling box mounting member 101 are inclined, and the front and rear ends of the seedling box mounting member 101 are open. Therefore, the seedling box 68 can be put in and taken out from the front and rear direction of the machine body and from above, and when the seedling box 68 is placed on the seedling box mounting member 101 due to the inclination, it is prevented from falling due to the vibration of the machine body.

Also, when the first, second, and third spare seedling mounting bases 38a, 38b, and 38c are switched from the loaded state to the unfolded state, the seedling box mounting members 101 are similarly aligned in the vertical direction of the machine body. The moving state 101a is switched to the taking-out state 101b in which they are arranged in the longitudinal direction of the machine body.

In the unloading state 101b, the seedling box mounting members 101 are arranged in the longitudinal direction of the machine body, so that the seedling box mounting members 101 are adjacent to each other in a rail shape, and the seedling boxes 68 can be easily loaded and unloaded from the machine body to the field.

Also, since the seedling box 68 placed on the seedling box placing member 101 can be easily taken out from the field side, workability is improved.

In addition, in the take-out state 101b, the seedling box mounting member 101 positioned at the rear of the machine body is positioned above the seedling box mounting member 101 positioned at the front of the machine body, so that the seedling box 68 can be moved forward smoothly. can send.

Also, the seedling box placing member 101 is configured to place the seedling box 68 in an oblique posture toward the outside of the machine body. By doing so, when the first, second, and third spare seedling placement platforms 38a, 38b, and 38c are in the loaded state (the overall movement state 101a), the seedling box 68 inclines inward and comes into contact with the spare seedling placement platforms. can be prevented.

Further, in a state where the seedling box 68 is placed on the seedling box mounting member 101, it is possible to switch between the overall movement state 101a and the removal state 101b. In the overall movement state 101a, the seedling box mounting members 101 are separated from each other and aligned in the vertical direction of the machine body, so that the seedling box mounting member 101 positioned above serves to fix the seedling box 68 positioned below. It should be noted that the seedling box 68 placed on the top can be prevented from falling from the machine by another fixing member (not shown).

In addition, the front end and the rear end of the seedling box mounting member 101 are bent toward the upper side of the machine body. This prevents the seedling boxes 68 from slipping off during vibration of the machine or running on slopes.

The seedling transplanter according to the present invention can be used not only as a rice transplanter but also as a seedling transplanter for planting other seedlings such as vegetable seedlings.

2 Traveling vehicle bodies 38a, 38b, 38c Plural spare seedling mounting members 39a, 39b, 39c Plural moving link members 49 Support machine frame 68 Seedling box 101 Seedling box mounting member 101a Overall movement state 101b Individual movement state

Claims (1)

A seedling transplanter equipped with a seedling box (68) or a plurality of spare seedling frames (38) for placing seedlings in a supporting machine frame (49) provided on a traveling vehicle body (2),
A seedling box mounting member (101) for placing the seedling boxes (68) on the plurality of preliminary seedling frames (38) is provided, and the seedling box mounting member (101) is mounted on the outside of the preliminary seedling frame (38) or A seedling box (68) provided inside the machine body and placed on the seedling box mounting member (101) is supported in an oblique posture toward the outside of the machine body. The front and rear sides of the bottom supporting the box (68) are bent upward,
The seedling box mounting members (101) are provided in a plurality of spare seedling frames (38) respectively, the seedling box mounting members (101) are arranged in the vertical direction of the machine body, and the seedling box mounting members located above. A seedling transplanter characterized in that (101) plays a role of preventing a seedling box (68) placed on a seedling box mounting member (101) below from dropping.

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