CN110313282B

CN110313282B - Seedling transplanter

Info

Publication number: CN110313282B
Application number: CN201910248891.5A
Authority: CN
Inventors: 堀田直岐
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2018-03-30
Filing date: 2019-03-29
Publication date: 2022-10-14
Anticipated expiration: 2039-03-29
Also published as: CN110313282A; JP2019176812A; JP6897618B2; KR20190114802A

Abstract

The invention provides a seedling transplanter which is easy to take out and load into a seedling box relative to a seedling box carrying part. A seedling transplanter having a preliminary seedling frame configured to be switchable between a development state in which a plurality of preliminary seedling placing members are arranged in a front-rear direction and a stacking state in which a plurality of preliminary seedling placing members are arranged in a vertical direction, the seedling transplanter comprising: the prepared seedling frame is provided with a seedling box carrying part (101) for carrying an empty seedling box, and the seedling box carrying part (101) is moved in linkage with the switching between the unfolding state and the stacking state of the plurality of prepared seedling carrying parts.

Description

Seedling transplanter

Technical Field

The invention belongs to the technical field of seedling transplanting machines.

Background

As a seedling transplanter having a seedling transplanting device at the rear of a machine body, there is known a seedling transplanter having a preliminary seedling placing part formed of a plurality of preliminary seedling placing frames at a side part of the machine body.

Patent document 1 discloses a seedling transplanter configured to be capable of switching a plurality of preliminary seedling placement frames between a stacked state in which the plurality of preliminary seedling placement frames are stacked in a plurality of layers in a top-bottom direction in plan view and an expanded state in which the plurality of preliminary seedling placement frames are expanded in a substantially linear shape in a front-back direction. The switching mechanism is configured such that a plurality of preliminary seedling placement racks are attached to a parallel link mechanism including one long moving link member and two short moving link members, and the state of the preliminary seedling placement racks can be switched between a state in which the preliminary seedling placement racks are vertically overlapped (a stacked state in which the preliminary seedling placement racks are stacked in a plan view) and a state in which the preliminary seedling placement racks are arranged substantially on a straight line in the front-rear direction (an unfolded state in which the preliminary seedling placement racks are arranged in the horizontal direction) by rotation of the parallel link mechanism.

In addition, when any of the plurality of preliminary seedling placement racks is changed from the stacked state to the expanded state, the plurality of preliminary seedling placement racks are switched to the expanded state, and conversely, when any of the plurality of preliminary seedling placement racks is changed from the expanded state to the stacked state, the plurality of preliminary seedling placement racks are switched to the stacked state.

Therefore, the configuration described in patent document 1 can easily and quickly switch the states of the plurality of preliminary seedling placement racks, and can improve the operability of switching the states of the plurality of preliminary seedling placement racks as compared with the conventional art.

Patent document 2 describes the following mechanism: a seedling box placing member capable of temporarily placing a seedling box is provided so as not to fall down from a body due to vibration or wind.

Patent document 1: japanese laid-open patent publication No. 2012-205504

Patent document 2: japanese patent laid-open No. 2014-87276

However, it is not considered that the seedling box is frequently taken out and put into the seedling box.

Further, although the worker is assisted in performing the replenishing work from the side of the ridge, there is a problem that it is difficult to collect the seedling box placed on the seedling box placing member from the side of the ridge.

Disclosure of Invention

In view of the above-described problems of the seedling transplanter, an object of the present invention is to provide a seedling transplanter which is provided with a seedling box placing member that is easy to take out and load, and which can collect a seedling box placed on the seedling box placing member even in the vicinity of a ridge.

In order to solve the above problems, the invention according to claim 1 is a seedling transplanter comprising a preliminary seedling frame 38, wherein the preliminary seedling frame 38 is mounted on a support frame 49 provided on a traveling vehicle body 2: a plurality of preliminary

seedling carrying parts

38a, 38b, 38c for carrying seedlings box 68 or seedlings; and a plurality of moving link members for rotatably connecting the plurality of preliminary

seedling placing members

38a, 38b, and 38c, respectively, the preliminary seedling frame 38 being configured to: by the rotation of the plurality of moving link members, the seedling transplanting machine can be switched freely between a spread state in which the plurality of preliminary

seedling placing members

38a, 38b, 38c are arranged in the front-rear direction and a stacked state in which the plurality of preliminary

seedling placing members

38a, 38b, 38c are arranged in the up-down direction, and is characterized in that: a seedling box placing member 101 for placing the seedling box 68 is provided on the outer side of the body of the preliminary seedling frame 38, the arrangement of the seedling box placing member 101 can be switched by the rotation of the plurality of moving link members, the seedling box 68 placed on the plurality of seedling box placing members 101 is supported in an inclined posture toward the outer side of the body, and the front side and the rear side of the body of the bottom portion of the seedling box placing member 101 for supporting the seedling box 68 are bent upward.

According to the invention of claim 1, since the seedling box placing member 101 for placing the seedling box 68 is provided at the side of the

movable link members

39a, 39b, and 39c, the seedling box 68 can be easily taken out and put in from the outside of the machine body, and therefore, a field operator who works near the ridge can collect the seedling box.

Further, the arrangement of the seedling box placing member 101 can be switched, so that the seedling box 68 can be easily taken out and put in.

Drawings

Fig. 1 is a side view of a riding-type rice transplanter according to an embodiment of the present invention.

Fig. 2 is a plan view of the riding rice transplanter shown in fig. 1.

Fig. 3 is a side view of the pre-seedling placing rack of the riding type rice transplanter shown in fig. 1 arranged in three layers (stacked state).

Fig. 4 is a simplified side view of the pre-seedling rack of the riding type rice transplanter shown in fig. 1 arranged in three layers (stacked state).

Fig. 5 is a side view showing a state (an unfolded state) in which the preliminary seedling placement racks of the riding type rice planting machine of fig. 1 are arranged on the same plane.

Fig. 6 is a simplified side view of the pre-seedling placing rack of the riding type rice transplanter shown in fig. 1 arranged on the same plane (in an unfolded state).

Fig. 7 is a plan view showing a state (an unfolded state) in which the preliminary seedling placement racks of the riding type rice planting machine of fig. 1 are arranged on the same plane.

Fig. 8 is a block diagram showing the operation control of the preliminary seedling mounting rack of the riding type rice transplanter shown in fig. 1.

Fig. 9 (a) and (b) are simplified side views showing a stacked state and an expanded state of the preliminary seedling support of the riding type rice transplanter in fig. 1, and fig. 9 (c) and (d) are simplified side views showing a partially enlarged view of the expanded state of the preliminary seedling support of the riding type rice transplanter in fig. 1.

Fig. 10 (a) and (b) are a plan view of the switching drive device of the preliminary seedling placement rack of the riding type rice planting machine of fig. 1 and an internal configuration diagram of the switching drive device.

Fig. 11 is a plan view of a switching drive device of the preliminary seedling placing rack of the riding type rice planting machine of fig. 1.

Fig. 12 (a) and (b) are side views of the preliminary seedling support of the riding rice transplanter of fig. 1, fig. 12 (c) is a plan view of the preliminary seedling support of the riding rice transplanter of fig. 1, and fig. 12 (d) is an enlarged view of the front side protrusion of the preliminary seedling support.

Fig. 13 (a) and (b) are a side view showing the entire movement state of the seedling box placing member and a side view showing the individual movement state of the seedling box placing member.

Fig. 14 is a front view showing an individual moving state of the seedling box placing member.

Description of the reference symbols

2: a running vehicle body; 38: preparing a seedling frame; 38a, 38b, 38c: a plurality of preliminary seedling placing parts; 68: seedling box; 101: a seedling box carrying part; 101a: a state of overall movement; 101b: the individual movement state.

Detailed Description

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

Fig. 1 and 2 are a side view and a plan view of a riding type rice transplanter as a typical example of the seedling transplanter of the present invention, and the riding type rice transplanter is equipped with a fertilizer application device as a powder delivery device. In this riding rice transplanter 1 with a fertilizer applicator, a seedling planting unit 4 is installed on the rear side of a traveling vehicle body 2 so as to be able to ascend and descend via a lifting link device 3, and a main body part of a fertilizer applicator 5 is provided on the upper side of the rear part of the traveling vehicle body 2. The left and right directions in which the riding operator is directed to the forward direction of the riding rice transplanter are referred to as left and right, respectively, and the forward direction and the backward direction are referred to as front and rear, respectively.

The traveling vehicle body 2 is a four-wheel drive vehicle including 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), a transmission case 12 is disposed in a front portion of a vehicle body, front wheel final gearboxes 13, 13 are provided on left and right sides of the transmission case 12, and the left and right

front wheels

10, 10 are mounted on left and right front wheel axles protruding outward from respective front wheel support portions capable of changing a steering direction of the left and right front wheel final gearboxes 13, respectively. A front end portion of a main frame 15 is fixed to a rear surface portion of the transmission case 12, rear wheel gear boxes 18, 18 are supported to be swingable with rear wheel yaw shafts provided horizontally in front and rear at right and left center portions of a rear end of the main frame 15 as support points, and rear wheels 11, 11 are mounted on rear wheel axles protruding outward from the rear wheel gear boxes 18, 18.

The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission 12 via a belt transmission 21 and a hydraulic continuously variable transmission (HST) 23. The rotational power transmitted to the transmission case 12 is output by being split into traveling power and external output power after being shifted by a transmission in the transmission case 12. Also, a part of the running power is transmitted to the front wheel final gearboxes 13, 13 to drive the front wheels 10, and the remaining part is transmitted to the rear wheel gearboxes 18, 18 to drive the rear wheels 11, 11. The external output power is transmitted to the transplanting clutch box 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling transplanting portion 4 by the transplanting transmission shaft 26, and transmitted to the fertilizing device 5 by the fertilizing transmission mechanism 28.

The upper portion of the engine 20 is covered with an engine cover 30, and a seat 31 is provided thereon. A front cover 32 having various operating mechanisms built therein 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, and this region is used as an operating section 33. The left and right sides of the lower ends of the engine cover 30 and the front cover 32 are horizontal footrests 35. A part of the step plate 35 is in a grid shape (see fig. 2), and mud attached to the shoes of the worker stepping on the step plate 35 falls down into the field. The rear part of the step 35 is a rear step 36 which 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 right and left lower links 41, 41. The base sides of the links 40, 41 are rotatably attached to a link base frame 42 that is vertically provided at the rear end of the main frame 15 and has a portal shape when viewed from the rear, and a vertical link 43 is connected to the tip sides of the links 40, 41. A connecting shaft 44 rotatably supported by the seedling planting unit 4 is inserted and connected to the lower end of the vertical link 43, and the seedling planting unit 4 is connected to be swingable about the connecting shaft 44.

A hydraulic cylinder 46 for lifting and lowering is provided between a support member (not shown) fixed to the main frame 15 and the tip end of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is extended and contracted by hydraulic pressure to vertically pivot the upper link 40, thereby lifting and lowering the seedling planting unit 4 in a substantially constant posture.

The seedling transplanting part 4 is a six-row transplanting structure and has the following parts: a transmission case 50 that doubles as a frame; a seedling carrying frame 51 for carrying blanket seedlings (125101248312488, 12488, which reciprocates left and right to provide the seedlings to seedling taking-out ports 51a and 8230of each row one by one, and provides all the seedlings of a whole horizontal row to the seedling taking-out ports 51a and 8230, and when the seedlings are conveyed by seedling conveying belts 51b and 8230, the seedlings are conveyed downwards; a seedling planting device 52, 8230for planting seedlings supplied to the seedling take-out opening 51a, 8230into a field; and a pair of left and right scribe marks 75 (fig. 1) which scribe the body forward path in the next stroke on the surface of the earth.

A central floating body 55 is provided at the center of the lower part of the seedling planting part 4, and side

floating bodies

56, 56 are provided at the left and right sides thereof, respectively. When the machine body is moved in a state where the

floating bodies

55, 56 are in contact with the soil surface of the field, the

floating bodies

55, 56 slide while leveling the soil surface, and seedlings are planted along the soil preparation track by the seedling planting device 52, \8230. The

floating bodies

55, 56 are rotatably mounted so that the front end side moves up and down according to the unevenness of the surface of the earth, and the upward and downward movement of the front portion of the central floating body 55 during the transplanting operation is detected by an attack angle control sensor (not shown), and a hydraulic valve (not shown) for controlling the lifting hydraulic cylinder 46 is switched according to the detection result to lift the seedling planting part 4, whereby the planting depth of the seedlings is always maintained constant.

The fertilizer application device 5 feeds out granular fertilizer stored in the fertilizer hopper 60 by a predetermined amount at a time by the feeding portions 61, 8230823082308260, and guides the fertilizer to the fertilizer guides (not shown) attached to the left and right sides of the

floating bodies

55, 56, and falls into the fertilizer grooves formed near the side portions of the seedling row via the work groove bodies 76 (fig. 1) and 8230provided in front of the fertilizer guides. Air generated by a blower 58 driven by a blower motor 53 is blown into the fertilizing hoses 62, 8230and the fertilizer in the fertilizing hoses 62, 8230and is forcibly conveyed by wind pressure through an air chamber 59 which is long in the left-right direction.

A rotor 27 (a combination of the first rotor 27a and the second rotor 27b may be simply referred to as a rotor 27) as an example of a soil preparation device is attached to the seedling planting part 4. The seedling placing rack 51 is configured to slide in the left-right direction using, as a guide rail, a support roller 65a of a rectangular support rack body 65 having a width extending over the entire range in the left-right direction and the up-down direction and supporting the entire seedling planting section 4.

A pair of preliminary seedling mounting racks 38, 38 for mounting supply seedlings are provided on the left and right sides of the front portion of the traveling vehicle body 2 so as to be rotatable to positions extending forward and backward of the machine body and vertically aligned.

In fig. 3, a side view of the arrangement of the first, second and third preliminary

seedling mounting shelves

38a, 38b, 38c on one side of the machine body into three layers is shown, and in fig. 4, a simplified side view thereof is shown. Fig. 5 is a side view showing the first, second and third preliminary

seedling mounting shelves

38a, 38b and 38c arranged on the same plane, and fig. 6 is a simplified side view showing the same.

The preliminary seedling carrier 38 is supported by a support frame 49 arranged on the base side below the floor 35 of the traveling vehicle body 2, and is formed into three layers, i.e., upper and lower layers, by means of

movable link members

39a, 39b, and 39c, and the preliminary seedling carrier 38 is formed of a first preliminary seedling carrier 38a, a second preliminary seedling carrier 38b, and a third preliminary seedling carrier 38 c.

A first support frame body 37a, a second support frame body 37b and a third support frame body 37c are integrally attached to the bottom surfaces of the first preliminary seedling placing rack 38a, the second preliminary seedling placing rack 38b and the third preliminary seedling placing rack 38c, respectively, rotating shafts 39a1 and 39a2 at both ends of the first moving link member 39a are rotatably connected to the central portion of the first support frame body 37a and the front end portion of the second support frame body 37b, respectively, 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, and rotating shafts 39c1 and 39c2 at both ends of the third moving link member 39c are rotatably connected to the rear end portion of the second support frame body 37b and the central portion of the third support frame body 37c, respectively.

The outer peripheral portions of the rotating shafts 39a2, 39b1, 39b2, 39c1 are attached to the

support frame bodies

37a, 37b, 37c by welding. Support pieces (not shown) for moving the

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 frame bodies

37a, 37b, and 37c.

A pivot point 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, and is rotatable with respect to each other.

The support frame 49 is provided with two branch supports 49a and 49b at the front and rear sides, and the top portions of the branch supports 49a and 49b reach the vicinity of the lower surface of the second support frame 37 b. A rotation shaft 39b3 provided near the center of the second moving link member 39b is provided near the top of the front support 49a, and the second moving link member 39b is rotatable around the front support 49a about the rotation shaft 39b 3. The pivot shaft 39b3 is provided below the pivot fulcrum 37b1 of the second moving link member 39 b. A rotation shaft 39c3 provided near the rear end of the third moving link member 39c is provided near the top of the rear support 49b, and the third moving link member 39c is rotatable around the rear support 49b about the rotation shaft 39c 3. The pivot shaft 39c3 is provided below the pivot shaft 39c1 of the third moving link member 39 c.

The second preliminary seedling mounting frame 38b is not fixed to the front side support column 49a and the rear side support column 49b as the machine body members, and when the second moving link member 39b is rotated about the rotation fulcrum 39b3 from the state shown in fig. 3 to the state shown in fig. 5, the rotation fulcrum 39b3 is located below the rotation shaft 37b1 on the side surface of the central portion of the second preliminary seedling mounting frame 38b, and therefore the second preliminary seedling mounting frame 38b is disposed at a position ahead of the position shown in fig. 3. At this time, when the third movement link member 39c is also rotated about the rotation fulcrum 39c3 from the state shown in fig. 3 to the state shown in fig. 5, the second preliminary seedling placing rack 38c is also disposed at a position before the position shown in fig. 3.

Therefore, when the first, second, and third preliminary

seedling placement racks

38a, 38b, and 38c are brought into the expanded form on substantially the same plane as shown in the plan view of fig. 7, in the case where it is desired to obtain a placement plane for a wide seedling box 68 or the like, the three preliminary

seedling placement racks

38a, 38b, and 38c are moved to positions further forward than in the conventional case, and the front end of the machine body can be projected to the outside of the field, so that the operation of placing seedlings on the preliminary

seedling placement racks

38a, 38b, and 38c by a tractor or the like, for example, on a ridge, can be easily performed.

As shown in the plan view of fig. 7, a pair of front side protruding portions 38a1, 38b1, 38c1 protruding forward are formed at both front side end portions of the first, second, and third preliminary

seedling placing racks

38a, 38b, 38c, respectively, and rear side protruding portions 38a2, 38b2, 38c2 protruding rearward are formed at the center of the rear side end portions, respectively. Therefore, when the first, second and third preliminary

seedling placement frames

38a, 38b and 38c are in the expanded form, the rear protruding portions 38a2 and 38b2 of the preliminary seedling placement frames 38a and 38b positioned on the front side of the machine body are disposed at positions overlapping the front protruding portions 38b1 and 38c1 of the preliminary seedling placement frames 38b and 38c positioned on the rear side of the machine body in side view. Therefore, when the first, second and third preliminary

seedling support shelves

38a, 38b and 38c are in the spread state arranged in the front-rear direction, the first, second and third preliminary

seedling support shelves

38a, 38b and 38c can be arranged in a partially fitted state in the front-rear direction, and therefore the seedling box 68 mounted on the preliminary

seedling support shelves

38a, 38b and 38c can be smoothly moved to the rear side, and the work efficiency can be improved more than ever.

As shown in the side views of fig. 3 and 5, the front side projections 38a1, 38b1, 38c1 of the first, second and third preliminary

seedling placement frames

38a, 38b, 38c are formed in a shape inclined upward to the rear (rear upward inclined portion) such that the upper surfaces of the inclined shapes are higher than the seedling placement surfaces of the preliminary

seedling placement frames

38a, 38b, 38 c. The rear side projections 38a2, 38b2, 38c2 of the first, second and third preliminary

seedling placement frames

38a, 38b, 38c are higher than the seedling placement surfaces of the preliminary

seedling placement frames

38a, 38b, 38c, and are equal in height to or lower than the upper surfaces of the front side projections 38a1, 38b1, 38c 1.

Since the front side projections 38a1, 38b1, 38c1 are formed as the backward upward inclined portions, when the first, second and third preliminary

seedling placement frames

38a, 38b, 38c are brought into the expanded state, the seedling box 68 (see fig. 12) or the like can climb up the backward upward inclined portions and move backward when moving the preliminary

seedling placement frames

38a, 38b from the front side to the preliminary seedling placement frames 38b, 38c from the rear side, and therefore the movement of the seedling box 68 or the like is facilitated, and the work efficiency is improved over the conventional one. Further, by making the upper surfaces of the front side projecting portions 38a1, 38b1, 38c1 and the rear side projecting portions 38a2, 38b2, 38c2 higher than the seedling placing surfaces of the preliminary

seedling placing shelves

38a, 38b, 38c, when the first to third preliminary

seedling placing shelves

38a, 38b, 38c are brought into the storage form, the front side projecting portions 38a1, 38b1, 38c1 and the rear side projecting portions 38a2, 38b2, 38c2 can prevent the forward and backward movement of the seedling box 68 or the like placed on the preliminary

seedling placing shelves

38a, 38b, 38c, and therefore the downward falling of the seedling box 68 or the like from the respective seedling

preliminary placing shelves

38a, 38b, 38c is prevented, and the falling seedling box 68 or the like does not need to be picked up, and the work efficiency is improved over the conventional one.

Support members 38a3, 38b3, 38c3 for supporting the rear side protruding portions 38a2, 38b2, etc. of the front side preliminary

seedling placement frames

38a, 38b are provided between the left and right sides of the pair of front side protruding portions 38a1, 38b1, 38c1 of the preliminary

seedling placement frames

38a, 38b, 38c and at the bottom of the preliminary

seedling placement frames

38a, 38b, 38c, respectively, and the support members 38a3, 38b3, 38c3 are formed so as to protrude toward the space between the pair of front side protruding portions 38a1, 38b1, 38c 1.

In this way, the supporting members 38b3, 38c3 can support the rear side protruding parts 38a2, 38b2 of the preliminary

seedling placing racks

38a, 38b on the front sides between the left and right sides of the front side protruding parts 38b1, 38c1 of the preliminary

seedling placing racks

38b, 38c, so that the preliminary

seedling placing racks

38a, 38b, 38c are not excessively lowered, and the preliminary

seedling placing racks

38a, 38b, 38c in the spread state are reliably arranged in a posture substantially on the same plane, and therefore the loading operation of the seedling box 68 and the like is facilitated, and the operation efficiency is improved over the conventional one.

Further, since the support members 38a3, 38b3, 38c3 are provided on the bottoms of the preliminary

seedling placing shelves

38a, 38b, 38c and the upper ends of the rear side protruding portions 38a2, 38b2, 38c2 are at substantially the same height as the upper ends of the front side protruding portions 38a1, 38b1, 38c1 or are located below the upper ends, the movement of the seedling box 68 or the like that ascends the front side protruding portions 38a1, 38b1, 38c1 having the upwardly inclined portions can be smoothly performed, and thus the work efficiency is improved over the conventional one.

First, second, and third blocking walls 38a4, 38b4, and 38c4 for preventing the seedling box 68 and the like from falling are disposed respectively in front and rear (four positions in total) of the left and right side surfaces of the first, second, and third preliminary

seedling placing shelves

38a, 38b, and 38 c.

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 placing rack 38 b. In this case, the central second preliminary seedling carrier 38b does not move back and forth.

As described above, the first, second, and third preliminary

seedling placement frames

38a, 38b, and 38c can be switched between the spread state in which the preliminary

seedling placement frames

38a, 38b, and 38c are arranged in the front-rear direction and the stacked state in which the preliminary

seedling placement frames

38a, 38b, and 38c are arranged in the up-down direction by the operation (rotation) of the first, second, and third

movement link members

39a, 39b, and 39c, and the switching can be performed by the switching drive device 70 driven by the electric motor 71. The switching drive device 70 is provided with: a drive gear 71a attached to a rotation shaft, not shown, of the electric motor 71; and a disk-shaped, semicircular, or half-moon shaped switching gear 70a that meshes with the drive gear 71a and rotates integrally with the rotating shaft 39b3 of the moving link member 39 b.

Since the switching gear 70a is provided concentrically with the turning shaft 39b3 of the moving link member 39b provided on the front support strut 49a and rotates integrally with the turning shaft 39b3, the turning shaft 39b3 is turned by the driving of the electric motor 71, and the second moving link member 39b integrally with the turning shaft 39b3 is turned at the same time, thereby switching the first, second, and third moving

link members

39a, 39b, and 39c between the stacked state and the deployed state.

A block diagram of the operation control of the

preliminary seedling carriers

38a, 38b, 38c is shown in fig. 8.

As a switching operation member for switching the preliminary

seedling placement frames

38a, 38b, 38c between the expanded state and the stacked state by the switching drive device 70, a switching switch 73 (which may be a button or a lever) (fig. 1, 2) is provided near the seat 31, and as shown in the simplified diagram of fig. 4 and 6, stop plates 73a1, 73a2 are provided on the side surfaces of the third preliminary seedling placement frame 38b and the second preliminary seedling placement frame 38c, respectively, and the stop plates 73a1, 73a2 stop the preliminary

seedling placement frames

38a, 38b, 38c when the preliminary

seedling placement frames

38a, 38b, 38c are rotated to the expanded state or the stacked state by the operation of the switching switch 73. The stop plate 73a1 is a member as follows: when the preliminary

seedling placing shelves

38a, 38b, and 38c are in the expanded state, the second moving link member 39b contacts the stop plate 73a1, and applies an excessive load to the electric motor 71 to generate an excessive voltage or overheat it to stop the operation, and the stop plate 73a2 is a member that: when the preliminary

seedling placing shelves

38a, 38b, and 38c are stacked, the stopper plate 73a2 contacts the second moving link member 39b, and an excessive load is applied to the electric motor 71 to generate an excessive voltage or the electric motor is overheated to stop the operation.

Further, when the stop plates 73a1 and 73a2 are continuously in contact with the second moving link member 39b, the electric motor 71 is stopped by the load of the electric motor 71 which is continuously driven although the second moving link member 39b is in contact with the stop plate 73a1 or 73a2 and cannot be further rotated, and an energizing path using the bimetal portion 85 is arranged inside the electric motor 71, and when heating is performed by the load or an excessive voltage is applied, the bimetal portion 85 is bent (retracted), and energization is stopped, and rotation of the electric motor 71 is stopped, so that the operator does not have to perform a stopping operation of the electric motor 71, and thus the work efficiency can be improved over the conventional one, and the work efficiency can be improved. In the case of the voltage type, the operation can be performed again immediately after the stop. In the case of the heating type, the electric motor 71 is not operated until the heat of the bimetal portion 85 is reduced to return to its original state.

Further, since the second moving link member 39b is configured to contact the stop plate 73a1 or 73a2 when the preliminary

seedling placement frames

38a, 38b, 38c are in the spread state or the stacked state, the first, second, and third preliminary

seedling placement frames

38a, 38b, 38c are prevented from swinging back and forth by the movement of the second moving link member 39b due to the vibration of the machine body, the falling of the seedlings is prevented, and the wear of the first, second, and third preliminary

seedling placement frames

38a, 38b, 38c and other components for placing the preliminary seedlings due to the swinging is reduced.

Further, since the components and circuits such as the switch for stopping the electric motor 71 when the first, second and third preliminary

seedling placing shelves

38a, 38b and 38c are brought into the expanded state or the stacked state can be omitted, the number of components is greatly reduced and the structure becomes simple.

If a conventional limit switch is used, a cable or a circuit for transmitting a stop signal while moving the

link members

39b and 39c into contact with the switch is required, and therefore, the number of parts is large and the structure is complicated. Further, since a limit switch for stopping in the expanded state and a limit switch for stopping in the stacked state are required, the number of parts further increases, and the structure becomes complicated.

In contrast, in the present invention, since the electric motor 71 is automatically stopped when the bimetal portion 85 in the electric motor 71 is retracted (bent) due to overvoltage or overheat, a path for transmitting a stop signal is not required, and therefore, a switch for operating the electric motor 71 into the expanded state and the stacked state is provided and the switch and the electric motor are connected by a cable, so that the number of components is reduced and the structure is simplified.

Further, as shown in fig. 5, the stop plate 73a1 for stopping the operation of the first, second, and third

movement link members

39a, 39b, and 39c when the first, second, and third preliminary

seedling placement frames

38a, 38b, and 38c are in the spread state is disposed on the second preliminary seedling placement frame 38b on the center layer, and as shown in fig. 3, the seedling plate 73a2 for stopping the first, second, and third

movement link members

39a, 39b, and 39c in the stacked state of the first, second, and third preliminary

seedling placement frames

38a, 38b, and 38c is disposed on the third preliminary seedling placement frame 38c on the lower layer, whereby the first, second, and third

movement link members

39a, 39b, and 39c are brought into contact at the position of the spread state or the stacked state, and thus a compact configuration can be achieved.

Further, since the first, second and third moving

link members

39a, 39b and 39c are in contact with the stop plates 73a1 and 73a2 to stop, the first, second and third preliminary

seedling placement frames

38a, 38b and 38c are prevented from swinging back and forth by moving the first, second and third moving

link members

39a, 39b and 39c due to vibration of the machine body, preventing the falling of the seedlings, and reducing the wear of the first, second and third preliminary

seedling placement frames

38a, 38b and 38c and their surrounding members due to the swinging.

Further, since a load is easily applied to the electric motor 71 by the contact of the first, second, and third moving

link members

39a, 39b, and 39c with the stop plates 73a1 and 73a2, the electric motor 71 is stopped quickly, and the amount of power consumption is reduced.

Also, simplified diagrams of the stacked state and the spread state of the first, second and third

preliminary seedling carriers

38a, 38b and 38c, respectively, as other embodiments of the present invention, are shown in fig. 9 (a) and 9 (b). The stop plates 73a1 and 73a2 in this case are provided on the front and rear side surfaces of the second preliminary seedling placing rack 38b, respectively.

In this case, when the first, second and third preliminary

seedling placement frames

38a, 38b and 38c are brought into the spread state, the upper and lower ends of the second moving link member 39b are brought into contact with the stop plates 73a1 and 73a2, respectively, and the first, second and third moving

link members

39a, 39b and 39c are brought into a stopped state, so that the first, second and third preliminary

seedling placement frames

link members

39a, 39b and 39c due to vibration of the machine body, and falling of seedlings is prevented, and abrasion of the components represented by the first, second and third preliminary

seedling placement frames

38a, 38b and 38c due to the swinging is reduced.

When the first, second, and third preliminary

seedling placement frames

38a, 38b, and 38c are switched from the stacked state to the spread state, as shown in fig. 9 (c) and (d), which are partially enlarged views, the second moving link member 39b and the first and third moving

link members

39a and 39c sandwich the stopper plates 73a1 and 73a2, respectively, so that the first, second, and third moving

link members

39a, 39b, and 39c are in a locked state, and the first, second, and third moving

link members

39a, 39b, and 39c are prevented from moving and swinging back and forth due to vibration of the machine body, and the falling of the seedlings is prevented, and the wear of the components of the preliminary seedling placement frames due to the swinging is reduced.

As shown in the plan view of the switching drive device 70 in fig. 10 (a) and the internal configuration diagram of the switching drive device 70 in fig. 10 (b), in the present embodiment, an auxiliary plate 79 is attached to a cover plate 78 constituting the switching drive device 70, and the auxiliary plate 79 is provided with a rotating shaft 71a1 on which the drive gear 71a of the electric motor 71 is provided so as to be out of phase with a rotating shaft 81 of the switching gear 70a that moves the first, second, and third moving

link members

39a, 39b, and 39 c. Moreover, the following structure is adopted: a motor mounting plate (holding plate) 80 is mounted between 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, since the holding plate 80 is provided between the cover plate 78 and the auxiliary plate 79 and the electric motor 71 is attached to the holding plate 80, when the first, second, and third moving

link members

39a, 39b, and 39c contact the stop plates 73a1 and 73a2 and a load is applied, a force for retracting the electric motor 71 is applied to the holding plate 80 and the cover plate 78 receives the force, so that the holding plate 80 is not easily bent.

Further, since no force is applied to the electric motor 71 by the load, the electric motor 71 is prevented from retreating, and the distance between the electric motor 71 and the switching gear 70a is prevented from increasing, so that the adjustment work of the switching drive device 70 is omitted, and the workload of the worker is reduced.

As shown in the plan view of the switching drive device of the first, second, and third preliminary

seedling placement racks

38a, 38b, and 38c in fig. 11, a guide cover 88 covering the switching drive device 70 is provided around the side surface portion of the second preliminary seedling placement rack 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 coupled to the cover plate 78, and the auxiliary cover 82 is coupled to the main cover 83 and the cover plate 78.

According to the configuration shown in fig. 11, since the electric motor 71 and the holding plate 80 are exposed when the auxiliary cover 82 is removed, adjustment and cleaning can be performed without removing the entire guide cover 88 at each maintenance, and the maintenance is higher than ever before.

The electric motor 71 may be provided with a bimetal 85 (only shown in fig. 8) incorporated therein, and the bimetal 85 may be deformed to stop the energization state when a load is applied and heat of a predetermined temperature or higher is generated. In this way, when an overload is applied to the electric motor 71 to generate an overvoltage or an overheat occurs to reach a predetermined temperature or higher, the bimetal portion 85 deforms to stop the energization, and therefore, when the first, second, and third preliminary

seedling placing racks

38a, 38b, and 38c are in the expanded state or the stacked state, if an overvoltage or an overheat is applied to the electric motor 71, the electric motor 71 is stopped, and thus, the stopping operation of the electric motor 71 is not required.

As shown in fig. 12 (a), a side view of the preliminary seedling placing rack of fig. 12 (b), a plan view of fig. 12 (c), and an enlarged view of the front side protruding part of the preliminary seedling placing rack of fig. 12 (d), front side protruding parts 38b1, 38c1 protruding forward are formed at the front side end parts of the first, second, and third preliminary

seedling placing racks

38a, 38b, 38c, respectively, but a backward and upward inclined surface is formed at the front side protruding parts 38b1, 38c1, and transfer

auxiliary rollers

47b, 47c for assisting transfer of seedlings by making a vacant turn are disposed at the front side protruding parts 38b1, 38c1, respectively. The upper surfaces of the conveyance

auxiliary rollers

47b and 47c are configured to protrude upward from the upper portions of the rearward and upward inclined surfaces of the front side protrusions 38b1 and 38c 1.

Further, the seedling box placing member 101 shown in fig. 13 and 14 will be described.

Seedling box loading parts 101 are respectively arranged at the outer sides of the machine bodies of the first, second and third preliminary

seedling loading frames

38a, 38b and 38c, and the seedling box loading parts 101 are used for loading the seedling box 68. The seedling box placing member 101 is fixed to the preliminary seedling placing rack, and is configured to move together with the preliminary seedling placing rack.

The seedling box placing member 101 is made of a wiring material, and has a body opened in the front-rear direction and the upper side, and inclined portions are provided at the front and rear end portions of the seedling box placing member 101. Therefore, the seedling box 68 can be taken out and loaded from the front-rear direction and from above the machine body, so that the seedling box 68 does not fall down due to vibration of the machine body when being placed on the seedling box placing member 101 via the inclined portion.

Further, when the first, second and third preliminary

seedling placing racks

38a, 38b and 38c are switched from the stacked state to the spread state, the seedling box placing part 101 is also similarly switched from the individual moving state 101b in which the seedling box placing parts 101 are arranged in the up-down direction of the machine body to the overall moving state 101a in which they are arranged in the front-rear direction of the machine body.

In the overall movement state 101a, the seedling box placement members 101 are arranged in the front-rear direction of the machine body, so that the seedling box placement members 101 are in a track shape adjacent to each other, and the seedling box 68 can be easily loaded and unloaded from the machine body into and from the field.

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

In the case of the entire movement state 101a, the seedling box placement member 101 located on the rear side of the machine body is located above the seedling box placement member 101 located on the front side of the machine body, so that the seedling box 68 can be smoothly fed out to the front side of the machine body.

The seedling box placing member 101 is configured to place the seedling box 68 in an inclined posture toward the outside of the machine body. Thus, the seedling box 68 can be prevented from being inclined toward the inside of the machine body and from contacting the preliminary seedling placement racks 38 when the first, second and third preliminary

seedling placement racks

38a, 38b and 38c are in the stacked state (the individually moved state 101 b).

Further, the seedling box 68 can be switched between the overall movement state 101a and the individual movement state 101b in a state of being placed on the seedling box placing member 101. In the single movement state 101b, the seedling box placement members 101 are arranged in the vertical direction of the machine body with a space therebetween, and thus the seedling box placement member 101 located above serves to fix the seedling box 68 located below. The seedling box 68 placed on the uppermost part can be prevented from falling from the machine body by another fixing member (not shown).

The front end and the rear end of the seedling box placing member 101 are curved upward of the body. Thereby, the seedling box 68 is not slid off during traveling due to vibration or inclination of the body.

Industrial applicability

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

Claims

1. A seedling transplanter having a preliminary seedling frame (38), the preliminary seedling frame (38) being mounted on a support frame (49) provided to a traveling vehicle body (2) with: a plurality of preliminary seedling placing members (38 a, 38b, 38 c) for placing a seedling box (68) or seedlings; and a plurality of moving link members for rotatably connecting the plurality of preliminary seedling placing members (38 a, 38b, 38 c) to each other,

the prepared seedling frame (38) is composed of: by the rotation of the plurality of moving link members, the switching between the spread state in which the plurality of preliminary seedling placing members (38 a, 38b, 38 c) are arranged in the front-rear direction and the stacked state in which the plurality of preliminary seedling placing members (38 a, 38b, 38 c) are arranged in the up-down direction is free,

the seedling transplanter comprises: a seedling box carrying component (101) for carrying a seedling box (68) is arranged at the outer side of the body of the preparation seedling frame (38), the arrangement of the seedling box carrying component (101) can be switched by the rotation of the plurality of movable connecting rod components,

the seedling boxes (68) placed on the plurality of seedling box placing members (101) are supported in an inclined posture toward the outside of the machine body, and the front side and the rear side of the machine body of the bottom of the seedling box placing members (101) supporting the seedling boxes (68) are bent upward.