JP2001314108A - Walking-type seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking-type seedling transplanter so designed that operative tools and the corresponding operative guides are furnished at proper positions in consideration of the operability of the operative tools, and a seedling tray conveyor is made attachable/detachable to/from the machine body as well. SOLUTION: This walking-type seedling transplanter has such a scheme that a seedling tray conveyor 4 is disposed to convey seedling trays packed with seedlings midway in the longitudinal direction between a traveling section 1a furnished in the front of a machine body and a steering handle 7 in the rear of the machine body, and seedlings are taken out of the thus conveyed seedling trays and planted in the farming field; wherein the seedling tray conveyor 4 is detachably mounted on a frame 14 linking the traveling section 1a and the steering handle 7 to each other, the respective rear ends of operative tools 148 and 154 for the traveling section 1a, etc., are disposed behind the seedling tray conveyor 4, and the respective operative guides 148a and 154a for the operative tools always lie united with the frame 14 whether the seedling tray conveyor 4 is in a detached or attached state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking-type seedling transplanter for removing seedlings from a seedling tray and planting the seedlings in a field.

[0002]

2. Description of the Related Art A seedling tray transfer device for transferring a seedling tray containing seedlings to a front and rear intermediate portion between a traveling portion arranged at a front portion of a body and a steering handle provided at a rear portion of the body, and a seedling tray transfer device. There is a walking type seedling transplanter provided with a seedling removal device for taking out seedlings from a seedling tray to be taken, a seedling planting device for receiving seedlings from the seedling removal device and planting the seedlings in a field.

[0003]

In the walking type seedling transplanter of this type, operating devices such as a traveling speed change lever, a planting depth adjusting lever, and a recoil knob of an engine are required to be operated in consideration of their operability. It is desirable to provide it near the steering handle on the rear side. When arranging the operation tools as described above, it is a practically reasonable arrangement to attach the operation guides of these operation tools to a part of the seedling tray transport device. However, such an arrangement has a disadvantage that the seedling tray transport device cannot be detached from the machine for maintenance or the like. Therefore, an object of the present invention is to provide an operation tool and an operation guide thereof at an appropriate position in consideration of the operability of the operation tool, and to make the seedling tray transport device detachable from the machine body.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is constituted as follows: a seedling transplanter according to the present invention comprises a traveling part arranged at the front part of the body and a rear part of the body. A seedling tray transport device that transports a seedling tray containing seedlings is disposed at an intermediate portion between the front and rear of the steering handle arranged in the plant, and the seedlings are taken out from the seedling tray transported by the seedling tray transporting device and planted in a field. In the walking type seedling transplanter to be attached, the seedling tray transport device is detachably provided on a frame connecting the traveling section and the steering handle, and a rear end of an operating tool for operating the traveling section and the like is provided on the seedling tray. The present invention is characterized in that the operation guide of the operation tool is provided behind the transporting device and is always integrated with the frame irrespective of the detached state of the seedling tray transporting device.

[0005]

1 to 14 show a vegetable transplanter as an example of a seedling transplanter to which the present invention is applied. The vegetable transplanting machine 1 is configured such that a traveling portion 1a having traveling wheels 2, 2, 3, and 3 moves the machine body in a state of straddling a ridge U, while transferring a seedling tray transport device 4, a seedling removal device 5, a seedling planting device. 6
The planting section 1b is configured to plant the soiled seedlings of vegetables stored in the seedling tray on the upper surface of the ridge U. The operator moves the steering handle 7 while walking behind the fuselage.
Then, the steering operation of the aircraft is appropriately performed. Hereinafter, the configuration of each unit will be described.

[0006] The traveling section 1a has an engine 8 at the front end of the body.
And a traveling unit transmission case 9 to which the rotational power of the engine 8 is transmitted is provided on the rear side. Further, a hydraulic pump 10 driven by the power of the engine 8 is provided on a left side surface portion of the engine 8. Further, a fuel tank 11 and the like are provided above the engine 8, and a hood 12 covers the upper side thereof. A left and right long connecting frame 13 of a rectangular shape in a side view is integrally provided on the back of the traveling unit transmission case 9, and a front end of a main frame 14 is fixedly connected to a right end of the back of the connecting frame. The main frame 14 extends rearward through the right side of the planting portion 1b in plan view, curves obliquely upward on the way, and extends as it is to the rear position of the planting portion 1b. And
A steering handle 7 is fixedly attached to the rear end.

[0007] The traveling transmission cases 16, 1 are attached to rotating tubular portions 15, 15 projecting from the left and right side surfaces of the traveling section transmission case 9, respectively.
The rear wheels 2, 2 as driving wheels are supported on the outside of the front end of the traveling transmission case. From the transmission section transmission case 9 to the rear wheels 2, 2,
The transmission is performed via shafts in the transmission transmission cases 5 and 15 and chains in the traveling transmission cases 16 and 16. Front wheel support rods 18, 18 are attached to the left and right ends of a front wheel support frame 17 provided at the lower side of the engine 8 so as to be swingable about a pivot shaft 17a in the front-rear direction. The front wheels 3, 3 which are rolling wheels are pivotally supported at the lower end.

The traveling section 1a is provided with a body control mechanism for controlling the position of the body by moving the rear wheels 2, 2 up and down with respect to the body. This body control mechanism is provided with an elevating cylinder 21 provided rearward from a hydraulic valve unit 20 disposed on the traveling unit transmission case 9, and a balance rod 22 is provided at a tip end of a piston rod of the cylinder around a vertical axis. Is mounted to be rotatable. The front and rear ends of the piston rod slide along a guide shaft 24 supported by the hydraulic valve unit 20 and an attachment member 23 attached to the main frame 14. The swing arm 2 fixed to the left and right ends of the balance rod 22 and the rotating cylinders 15, 15.
5, 25 are connected via connecting rods 26, 26. The left connecting rod 26 has a rolling cylinder 27 incorporated therein, and its length can be changed by expanding and contracting the cylinder.

The hydraulic pump 10 supplies hydraulic oil to the lifting cylinder 21 and the rolling cylinder 27, and the supply is controlled by a control valve (not shown) in the hydraulic valve unit 20. When the elevating cylinder 21 is extended and retracted, the left and right rear wheels 2 and 2 move up and down by the same amount in the same direction with respect to the body, and the body is raised and lowered. When the rolling cylinder 27 is extended and retracted, the left and right rear wheels 2 and 2 move up and down by the same amount in the opposite direction with respect to the body, and the body is tilted left and right.

On the upper surface of the connecting frame 13, a lower portion of the planting section transmission case 30 transmitted from the traveling section transmission case 9 is fixed. An intermediate gear case 32 serving also as a support frame of the seedling extracting device 5 is fixedly provided on an upper frame 31 bridged between an upper end portion of the planting section transmission case 30 and a rear portion of the main frame 14. The shaft and longitudinal feed in the transmission pipe 34 are transmitted from the transmission case 30 to the intermediate gear case 32 via the chain in the seedling removal transmission case 33 and from the intermediate gear case 32 to the later-described vertical feed drive shaft 44 of the seedling supply device 4. Power is transmitted through a chain in the transmission case 35. The base of the first planting transmission case 36 is fixed to the upper part of the planting section transmission case 30, and the base of the second planting transmission case 37 is fixed to the tip of the first planting transmission case. . The first planting transmission case 36 and the second planting transmission case 37 are connected to a planting cup operating mechanism of the seedling planting device 6 described later. Reference numeral 38 denotes a spare seedling mounting table, which is attached to a spare seedling mounting frame 39 having a base fixed to an upper end of the planting section transmission case 30.

Here, a seedling tray used in the seedling transplanter will be described. As shown in FIG.
Is a plurality of seedling raising pots 161,... Connected in rows and columns, and is made of plastic and has a flexible structure. The pots 161 are connected on the front side,
Since the back side is an independent form, the seedling tray 160
The vertical groove 162 and the horizontal groove 16
3 are formed.

FIGS. 3 to 5 show a seedling tray transport device. The seedling tray transport device 4 includes a seedling mounting table 41 that can move in the left-right direction along guide rails 57 and 58 described later.
The seedling mounting table 41 has a bottom plate 42 inclined forward and downward to support the bottom of the seedling tray 160 over a horizontal row of pots, and side plates 43, 43 are fixedly provided on both left and right ends of the bottom plate 42. .

A vertical feed drive shaft 44 is provided between the lower portions of the left and right side plates 43, 43, and drive sprockets 45, 45 are respectively attached to both left and right ends thereof. Also,
A vertical feed driven shaft 46 is provided between the upper portions of the left and right side plates 43, 43, and driven sprockets 47, 4 at both left and right end portions thereof.
7 are attached respectively. The transport chain 50 is wound around the driving sprocket 45, the driven sprocket 47, and the chain tightener 48. On the inside of the opposite side of the transport chain 50, engaging pins 51,... Protruding in a cantilever shape inside the seedling mounting table 41 are attached at predetermined intervals so as to fit into the lateral grooves 163 of the seedling tray. .

On the outer peripheral portions of the left and right side plates 43 facing each other,
A flange portion 43a that covers the transport chain 50 from outside is formed inward. And, this flange portion 43a
Is provided with a holding frame 52 for holding the edge of the seedling tray from above. A guide plate 53 that engages with the vertical groove 162 at the center of the seedling tray and guides the seedling tray in the vertical feeding direction is provided at the left and right central portions of the bottom plate 42.

The lower end of the bottom plate 42 has an arc shape in a side view centered on the vertical feed drive shaft 44. In addition, a pressing member 54 for pressing the seedling tray from the upper surface side and bending the seedling tray along the arc-shaped portion is provided corresponding to the arc-shaped portion 42a. The holding member 54 has a tip portion at the bottom plate 4.
In a state of being urged to the two sides, it is mounted on a mounting shaft 55 provided between the lower portions of the side plates 43, 43. Further, a guide rod 5 for guiding the seedling tray backward after the pressing member 54 is provided.
6 is provided below the bottom plate 42.

When the seedling tray 160 is inserted from above the seedling mounting table 41 so as to be sandwiched between the bottom plate 42 and the holding frame 52, the transport chains 50 and 5 are inserted into the lateral groove 163 of the seedling tray.
Are engaged. When the drive shaft 44 rotates in the direction of the arrow in FIG. 4 in this state, the seedling tray 160 is vertically fed obliquely downward along the bottom plate 42. When the seedling tray 160 is fed vertically to the arc-shaped portion 42a of the bottom plate, the seedling tray 160 is bent downward along the arc-shaped portion, and further guided along the guide rod 56 to above the control handle 7.

The seedling mounting table 41 is movably supported along guide rails 57 and 58 provided in the left-right direction. The left and right ends of both guide rails 57, 58 are connected by support members 59, 59, and the lateral feed shaft 6 having a spiral groove 60a formed on the outer peripheral surface between the left and right support members.
0 is rotatably supported. A slider 61 connected to the seedling mounting table 41 is externally fitted to the lateral feed shaft 60,
An engaging member (not shown) of the slider is engaged with the spiral groove 60a. Thus, when the transverse feed shaft 60 is intermittently driven to rotate, the slider 61 moves left and right, and the seedling mounting table 41 is intermittently reciprocated in one of the left and right directions. .. Are supplied to a predetermined seedling removal position P one by one in order. The seedling 165 supplied to the seedling removal position P is removed from the pot 161 by the seedling removal device 5.

A pair of left and right vertical feed cams 62 are fixedly attached to the horizontal feed shaft 60. Cam followers 63, 6 corresponding to these vertical feed cams 62, 62
3 is attached to the left and right side plates 43,
A horizontal feed shaft 60 and the vertical feed drive shaft 44 are provided between the reference numerals 43. The left end portion of the vertical feed action shaft 64 protrudes out of the side plate 43, and the swing link 65 is fixed to this protruding portion. The vertical feed drive shaft 44 also has a left end projecting outward from the side plate 43, and a pair of drive gears 6 having engaging teeth with which the swing link 65 engages at the projecting portion.
6, 67, and a one-way clutch 68 for rotating the vertical feeding action shaft 64 only in the vertical feeding direction of the seedling tray.

When the seedling mounting table 41 reaches the end of the left and right strokes and the seedling removal device 5 has taken out all the seedlings 165 in one row, the vertical feed cam 62 moves the cam follower 63.
, The vertical feed action shaft 64 is slightly rotated, and the swing link 65 is swung. Then, by the swing of the swing link 65, one of the drive gears 66 or 67 is rotated by one engagement tooth, and the vertical feed drive shaft 44 is rotationally driven by a certain angle. Thereby, the seedling tray 1 on the seedling mounting table 41
60 is fed vertically downward by one pot. Which of the pair of drive gears 66 and 67 is to be operated can be selected, and the drive gear is selected so that the vertical feed amount matches the pot pitch of the seedling tray to be used.

The guide rails 57 and 58 of the seedling mounting table are
Rear part of main frame 14 and horizontal bar 7b of steering handle
Are fixed to the mounting members 69,. Therefore, the seedling tray transport device 3
Can be easily removed from the body together with the guide rails 57 and 58, and maintenance can be easily performed.

The seedling removal device 5 is shown in FIGS. The seedling extraction device 5 includes a pair of left and right seedling extraction claws 70, 70, a nail support 71 provided with the seedling extraction nail at the tip, a nail guide 72 for guiding the seedling extraction claws 70, 70 forward and backward, a nail support 71, and a nail. Guide 7
2 is provided with a seedling removal tool 5a comprising a holding body 73 and the like for reciprocatingly holding the seedling 2 and moving along a predetermined trajectory while changing the posture.
70 moves forward and backward and opens and closes, so that the seedling removal position P
The seedlings are taken out of the pot located at the position (1) and supplied to the seedling planting device 6 into the planting cup 120.

The seedling removal claws 70, 70 are rotatably inserted into the claw mounting portion 71a of the claw support by inserting a base end bent at a right angle to the claw, and the tip side is rotatable in the left-right direction. It has become.

The main body of the claw support 71 is cylindrical, and claw guides 72 are inserted therein while being slidably supported by the claw mounting portions 71a and the lock arm mounting portions 71b at both ends of the claw support. Have been. A guide portion 72 a having a nail insertion hole through which the seedling removal nails 70 are inserted is integrally attached to the tip of the nail guide 72. A stopper 75 is attached to a middle part of the claw guide 72, and a claw guide projecting spring 76 is fitted between the stopper 75 and the lock arm attachment portion 71b of the claw support.

The interval between the nail insertion holes formed in the guide portion 72a of the nail guide is smaller than the interval between the base ends of the seedling extraction nails 70, 70. For this reason, when the claw guide 72 slides with respect to the claw support 71 and the seedling removal claws 70, 70 and the guide portion 72a move relatively, the distance between the tips of the seedling removal nails changes. That is, the guide part 72a is
The distance between the tips of the seedling removal nails becomes smaller as it is located closer to the base end of 0, 70, and when it becomes the narrowest, the solid line in FIG. In this way, the nail guide 72 is
Slides, the seedling removal claws 70, 70 are opened and closed.

The claw support 71 is slidably held by the cylindrical portion of the holding member 73, and is provided between the lock arm mounting portion 71b and the holding member 73.
Thus, the seedling removal claws 70, 70 are urged in a direction to retract with respect to the holding body 73.

A swing shaft 8 is provided below the intermediate gear case 32.
The holding member 73 is pivotally connected to the upper end of a swing arm 81 rotatably supported by a pin 0 with a pin 82, whereby the whole seedling removal tool is swingably supported about a swing shaft 80 as a fulcrum. Have been. A groove cam 83 is formed at an intermediate portion of the swing arm 81, and a crank pin 87 provided at a tip end of a crank body 86 attached to a seedling extracting drive shaft 85 protruding leftward from the intermediate gear case 32 is formed by the groove cam 83. It is loosely fitted to the cam 83. As shown in FIG. 10, the groove cam 83 is
1 from the fulcrum side to the tip side, a straight line portion 83a, a regular arc portion 8
3b, an inverted arc portion 83c is continuously formed. When the crank body 86 is driven to rotate counterclockwise in FIGS. 7 to 9, the crank pin 87 moves in the groove cam 83 and the seedling removal tool 5a swings.

A swinging plate 90 is swingably mounted on the upper part of the intermediate gear case 32 with a fulcrum pin 89. The swinging plate 90 has a J-shaped elongated hole 91, a holder 73 and a bracket 92 interposed therebetween. The roller 93, which is freely rotatable, is engaged. A rolling roller 95 is provided on the rocking plate 90, and the rolling roller 95 is connected to the seedling removal drive shaft 85.
Abuts on the outer peripheral surface of the drive cam 96 attached to the drive cam 96. When the drive cam 96 is driven to rotate counterclockwise, the posture of the rocking plate 90 is changed, whereby the posture of the seedling removal tool 5a is also changed.

Further, an extruding link 98 is rotatably connected to the lower end of the holding member 73 by a pin 99. A long groove 100 is formed at the tip of the extrusion link 98,
A pin 101 provided on an arm integrated with the claw mounting portion 71a of the claw support is engaged with this. The extrusion link 98 is provided with a substantially arcuate cam plate 102.
2 can contact the crank pin 87 of the crank body 86. When the crank pin 87 moves the groove cam 83 from the fulcrum side to the distal end side by the rotation drive of the crank body 86, the crank pin 87 pushes the push-out link 98 via the cam plate 102, so that the claw support 71 and The protruding seedlings 70, 70 supported on the holding member 73 project from the holding member 73. At the same time, the pawl support return spring 7
8 is compressed, and the restoring force for returning the nail support 71 and the seedling removal nails 70 and 70 to their original positions is stored.

The seedling removal tool 5a includes, in addition to the above components,
The following members are provided. The operating piece 104 is rotatably provided on the holding body 73 on a fulcrum shaft 105 and is urged by a torque spring 106 in the clockwise direction in FIGS. The operating piece 104 is substantially T-shaped, and each end is a lock portion 104a, a release portion 104b, and a pushing portion 104c, respectively.

The operating member 108 is provided integrally with the claw guide 72, and engages with the lock portion 104a of the operating piece in a state where no force is applied from the outside, thereby causing the claw guide 72 to operate.
The movement in the projecting direction is restricted.

The lock arm 109 is pivotally supported by the lock arm mounting portion 71b of the claw support, and
0 urges in the clockwise direction in FIGS. An engaged portion 109a engageable with the engaging portion 73a of the holding body 73, and an inclined surface 1 pushed up by the operating member 108
09b and a projection 109c pushed up by the release portion 104a of the operating piece.

The release member 111 is fixed to the rocking plate 90 so as to be adjustable in position.

Next, the operation of the seedling removal device 5 will be described. The cycle of the operation of the seedling removal device is such that the seedling 165 in the pot 161 of the seedling tray 160 at the seedling removal position P is
The process of projecting the seedling extraction claws 70, 70 from the lower side of the leaves 165a in an inclined state with respect to the center line of the seedling in front view and entering the floor soil portion 165b of the seedling (A of the seedling extraction nail tip trace K1). -B), and the pierced seedlings
The process of retracting the pot to the middle of the pot depth by the retracting operation of 70 (B-C), changing the position of the seedling removal claws 70, 70 from within the pot and moving the same to shift from the position facing the seedling tray to a substantially downward position. And the movement and posture of the seedling removal claws 70, 70 are performed following this stroke.
At the final position, the relative movement between the seedling removal claws 70, 70 and the claw guide 72 guiding the seedling removal claws 70, 70 causes the seedling removal claws 70, 7 to move.
The seedlings are detached from 0 and dropped and supplied to the planting cylinder of the planting device.
Further, the step of retracting the seedling removal claws 70, 70 (the same D-
E), a step of returning the seedling removal claws 70, 70 after the seedling detachment (same EF), and following this step, the seedling removal nails 70, 70 are moved from the substantially downward position to the seedling tray until the first step. It is a process of moving back while changing to the facing posture (FA).

FIG. 7 shows the state 1 during the FA process, in which the tip of the guide portion 72a scoops up the soiled seedling leaves of the pot 161 at the seedling extraction position P from the lower side, and the seedling removal tool 5a is placed on the seedling tray. It shows a state of moving toward the seedling tray 160. From this state, while the crank pin 87 moves along the circular arc portion 83b of the groove cam 83, the crank body 8
Even if 7 rotates, the swing arm 81 is maintained in a stationary state in which it does not swing.

During this time, the crank pin 87 is
By pushing and rotating the push-out link 98 through the, the seedling removal claws 70, 70 advance toward the floor soil portion of the seedling in the pot. On the other hand, the claw guide 72 is
Is engaged with the lock portion 104a of the operating piece, so that movement in the tip side of the seedling removal claw is restricted. For this reason,
When the seedling removal claws 70 are moved forward, the guide portion 72 of the nail guide
a relatively moves to the base end side of the seedling extraction claws 70, 70, and the distance between the distal ends of the pair of seedling extraction claws 70, 70 is reduced. As a result, the pair of seedling removal claws 70, 70 stabs obliquely with respect to the left and right centers of the floor soil portion 165b (see FIG. 6) and below the vertical center of the floor soil portion 165b (see FIG. 8).

Next, when the crank pin 87 passes through the regular arc portion 83b of the groove cam 83 and moves to the reverse arc portion 83c, the swing arm 81 rotates counterclockwise in FIGS. As a result, the entire seedling removal tool 5a moves to the side away from the pot, and the seedling is removed from the pot (FIG. 8).
By piercing the seedling removal claws 70, 70 into the floor soil as described above, the seedlings can be firmly held and taken out without damaging the stems and roots of the seedlings.

The seedling removal tool 5a holding the seedlings moves above the planting cup 120 while changing the posture from the substantially horizontal seedling removal posture to the substantially downwardly facing seedling release posture. The posture change of the seedling removal tool in this process is performed by engaging the roller 93 with the arc-shaped portion of the J-shaped elongated hole 91.

When the seedling removal tool 5a moves above the planting cup 120, the roller 93 moves to near the arc-shaped end of the elongated hole 91, and the release member 111 pushes the pushing portion 104c of the operating piece. Accordingly, the operation piece 104 rotates counterclockwise, and the engagement between the lock portion 104a of the operation piece and the operation member 108 is released. As a result, the nail guide 72 protrudes toward the tip of the seedling removal claw due to the resiliency of the claw guide projection spring 76, and the guide portion 72a pushes the seedling held by the seedling removal claws 70, 70 toward the tip to remove the seedling. Claws 70,
Remove from 70.

When the claw guide 72 protrudes, the operating member 108, which operates integrally with the claw guide 72, pushes up the inclined surface 109b to slightly rotate the lock arm 109 counterclockwise, and the engaged portion 109a of the lock arm 109a Is disengaged from the engaging portion 73a of the holder 73. As a result, the claw support 71 at the forward position is returned to the retracted position by the elastic force of the claw support return spring 78 (FIG. 9). At this time, since the operating member 108 is in contact with the lock arm mounting portion 71b of the claw support, the claw guide 72 also retreats as the claw support 71 retreats.

Even if the operating member 108 cannot push up the inclined surface 109b of the lock arm for some reason, when the roller 93 moves to the end of the elongated hole 91 on the arcuate portion side, the release member 111 is actuated by the operating member. By further rotating the 104 and pushing up the projection 109c of the lock arm with the release portion 104c of the operating piece, the engagement between the engaged portion 109a of the lock arm and the engagement portion 73a of the holder 73 is forcibly performed. To release.

As a result, the seedling removal claws 70, 70 and the claw guide 71 are both returned to the retracted positions, and the operating member 108 is in a lockable state. Thereafter, the swing arm 81 rotates clockwise with the rotation of the crank body 86, and the seedling removal tool 5
a moves to the position of FIG. During this movement, the drive cam 9
The convex portion 6 acts on the rolling roller 106 to change the posture of the rocking plate 90, whereby the posture of the seedling removal tool 5a is rapidly changed from a substantially downward posture to a substantially horizontal posture. For this reason, the seedling removal tool 5a moves to the entry start position by scooping up the leaves of the seedling at the seedling removal position P from below, and does not damage the leaves of the seedling.

FIGS. 12 and 13 show the configuration of the seedling planting apparatus.
The seedling planting device 6 includes a planting cup 12 whose lower part is opened and closed back and forth.
0 is provided. The planting cup 120 is used for the front member 1
The front member mounting arms 122A, 12 are each composed of a front member rotation arm 121A and a rear member 120b.
A front member 120a is integrally attached to 2A, and a rear member mounting arm 122B, 1 rotatably supported by a rear member rotation shaft 121B located in front of the planting cup 120.
The rear member 120b is integrally attached to 22B. Therefore, when the two members 120a and 120b rotate about the rotation shafts 121A and 121B as fulcrums, the planting cup 12
0 opens and closes back and forth. Front member mounting arm 122
The front member 120a and the rear member 120b rotate in conjunction with each other by the interlocking pin 123 that loosely fits into the long hole formed in the A and the rear member mounting arm 122B. The front member 120 is located between the leg 122aA of the front member mounting arm 122A and the leg 122aB of the rear member mounting arm 122B.
a and a spring 124 for urging the rear member 120b toward the closing side. The front member rotating shaft 12
1A and the rear member rotation shaft 121B are connected to each other by a connection member 125.

On the upper side of the planting cup 120, a cylindrical seedling guiding portion 126 for guiding the seedlings released from the seedling removing claws 70, 70 of the seedling removing device 5 into the planting cup 120 is provided with a front member rotating member. It is provided so as to be supported by the moving shaft 121A and the rear member rotating shaft 121B. As shown in FIG.
The release position X of the seedling by 0, 70 is closer to the seedling tray than the center Y-Y of the seedling guide path of the seedling guide 126.
Since the released seedlings 165 have inertia when moving from the seedling tray to above the seedling guide 126, they move to the opposite side of the seedling tray 160 before falling into the seedling guide 126, At the time of falling into the seedling guide 126, the seedling 16
5 passes through the center Y-Y of the seedling guide route.

The operation mechanism of the planting cup 120 has the following configuration. That is, the rear link support arm 127A is attached to the support portion projecting upward from the second planting transmission case 37.
Is rotatably mounted, and the base of the support arm is pivotally attached to the rear end of the link 128A.
1A is connected. A rear link drive arm 129A provided at the rear end of the second planted transmission case 37 is connected to an intermediate portion of the rear link 128A. A front link support arm 127B is rotatably attached to the planting section transmission case 30, and a rear member rotation shaft 121B is attached to the rear end of a front link 128B with a base pivotally attached to the support arm.
Are connected. A front link drive arm 129B provided at the rear end of the first planted transmission case 36 is connected to an intermediate portion of the front link 128B. Both drive arms 129
When A and 129B are driven and rotated, the rear link 128A and the front link 128B swing up and down while changing the position of the base part back and forth, and the planting cup 120 moves up and down while keeping a fixed posture with the lower end locus K2.

The opening and closing arm 1 is provided at the base of the rear link 128A.
31 is rotatably mounted and its opening / closing arm 131
And the front member mounting arm 122A are connected by an opening / closing rod 132. An opening / closing cam 133 that rotates integrally with the rear link drive arm 129A is attached to an intermediate portion of the rear link 128A. This opening / closing cam 1
A roller 134 as a cam follower 33 is provided on the opening / closing arm 131.

When the planting cup 120 is at the top dead center, seedlings are dropped and supplied into the seedling guide 126 by the seedling removal device. The supplied seedlings are guided into the planting cup 120 through the seedling guiding path of the seedling guiding section 126. The planting cup 120 holding the seedling descends and rushes into the topsoil of the ridge. And
At the bottom dead center, the lower part of the planting cup 120 is opened to form a hole for transplanting seedlings, and the seedlings held in the holes are released and planted. After planting the seedlings, the planting cup 120 rises with the lower part open, and closes the lower part just before the top dead center.

As shown in FIG. 13, the swing arm 81 of the seedling removal device is arranged outside the right front member mounting arm 122A, the rear member mounting arm 122B, and the connecting member 125, so that the planting is performed. When the cup 120 is at the top dead center, the swing arm 81 is connected to the front member mounting arm 122.
A, rear member mounting arm 122B, and connecting member 125
Even when they overlap with each other in a side view (see FIG. 14), they do not interfere with each other. For this reason, the seedling removal device, the seedling tray transport device, the spare seedling mounting table 41, and the like can be provided at a low position,
Stability can be achieved by lowering the center of gravity of the aircraft. In addition, since the distance from the lower end of the planting cup 120 to the rotation fulcrum (121A, 121B) can be increased, seedling transplantation of an appropriate size can be performed without increasing the opening and closing angles of the front member 120a and the rear member 120. Holes can be formed. For this reason,
Front member 12 opened when planting cup 120 is raised
Oa and the rear member 120 hardly lift the soil on the side wall of the seedling transplanting hole, and the formed seedling transplanting hole is stable.

Behind the seedling planting position, a pair of left and right pressure reduction wheels 140, 140 are provided. This crush wheel 140,
140 is mounted diagonally on the pressure-reducing wheel frame 141 supported at the front and rear intermediate portion of the main frame 14 so as to be able to swing up and down so that the interval between them becomes smaller toward the lower part. The surface is tumbled to collapse the soil around the seedling transplant hole after the seedlings are planted, refill the hole, and lightly crush the trace. In addition,
The crushing wheels 140, 140 are pressed against the ground by weights 142 provided at the rear end of the crushing wheel frame 141.

At the lower part of the fuselage, there is provided a grounding body 145 that rotates up and down according to the unevenness of the ridge surface. The vertical rotation of the grounding member 145 is transmitted to the lifting hydraulic valve in the hydraulic valve unit 20 via the interlocking mechanism 146, and causes the lifting cylinder 21 to expand and contract. Specifically, in the convex portion of the ridge surface, the elevating cylinder 21 is operated on the side that raises the aircraft,
In the concave portion of the ridge surface, the lifting cylinder 21
Activate Thereby, the planting depth of the seedlings is always kept constant.

The grounding member 145 is connected to the main frame 14.
And is supported by the tip of a support arm 147 that is rotatably provided. The planting depth of the seedling is adjusted by operating the planting depth adjusting lever 148 provided so as to rotate integrally with the support arm 147 to change the supporting height of the grounding body 145. By selectively engaging a middle portion of the planting depth adjusting lever 148 with any of a plurality of engaging portions of the guide groove formed in the lever guide 148a, the angle of the planting depth adjusting lever can be changed. It is designed to be fixed.
Therefore, the planting depth of the seedling is adjusted in a plurality of stages.

Note that the rolling hydraulic valve in the hydraulic valve unit 20 is switched in accordance with the movement of the pendulum 150 for detecting the left and right inclination, and when the machine body is inclined left and right, the rolling cylinder 27 is operated appropriately. Control the aircraft to return to the left and right horizontal.

The steering handle 7 has a substantially U-shape in plan view with both ends extending rearward, and grips 7a, 7
a is attached. Side clutch levers 151, 151 are provided below the grips 7a, 7a. In the vicinity of the steering handle 7, there are provided a planting raising / lowering lever 152 for performing an on / off operation of a planting clutch for transmitting to the planting section 1b and an elevating operation of the machine body, and a main clutch for performing an on / off operation of the main clutch. A lever 153, a running speed change lever 154 for changing the running speed, the planting depth adjusting lever 148, a recoil knob 155 of the engine, and the like are provided.

Similarly to the planting depth adjusting lever 148, the traveling speed change lever 154 has a middle portion selectively engaged with any one of a plurality of engaging portions of a guide groove formed in the lever guide 154a. , And the traveling speed is adjusted in a plurality of stages. A lever guide 154a of the traveling speed change lever is attached to the horizontal bar portion 7b of the steering handle 7, and a lever guide 148a of the planting depth adjustment lever.
Is attached to the main frame 14. Conventionally, since these lever guides are attached to the guide rails of the seedling mounting table, when the seedling tray transport device 3 is removed from the body, the traveling speed change lever 154 and the planting depth adjusting lever 148 are set.
Could not be used, but with this configuration, the traveling speed change lever 1 was removed with the seedling tray transport device 3 removed from the machine.
The aircraft can be moved by operating the lever 54 or the planting depth adjusting lever 148.

[0054]

As described above, in the walking type seedling transplanter according to the present invention, the operation guide of the operating tool is always integrated with the frame regardless of the state of attachment / detachment of the seedling tray transfer device. With this arrangement, the rear end of the operating tool extending rearward from the traveling portion can be disposed rearward of the seedling tray transport device, and the seedling tray transport device can be detachably attached to the machine body.

[Brief description of the drawings]

FIG. 1 is a side view of a vegetable transplanter.

FIG. 2 is a partially omitted plan view of the vegetable transplanter.

FIG. 3 is a perspective view of a seedling tray transport device.

FIG. 4 is a side sectional view of the seedling tray transport device.

FIG. 5 is a plan sectional view of the seedling tray transport device.

FIG. 6 is a plan sectional view of the seedling removal device.

FIG. 7 is a partially enlarged side view showing a state immediately before the seedling removal of the seedling removal device.

FIG. 8 is a side cross-sectional view showing a state immediately after the seedling removal of the seedling removal device.

FIG. 9 is a side cross-sectional view illustrating a state immediately after the seedling removal device of the seedling removal device.

FIG. 10 is a side view of the swing arm.

FIG. 11 is a rear view of the seedling removal device.

FIG. 12 is a side view of the seedling planting apparatus.

FIG. 13 is a plan view of the seedling planting apparatus.

FIG. 14 is a side view showing a release position of a seedling by a seedling removal nail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vegetable transplanter (seedling transplanter) 1a Running part 2 Rear wheel 3 Front wheel 4 Seedling tray transfer device 5 Seedling removal device 6 Seedling planting device 7 Operating handle 14 Main frame 57,58 Guide rail 148 Planting depth adjustment lever ( Operating tool) 148a Lever guide of planting depth adjusting lever 154 Travel shifting lever (operating tool) 154a Lever guide of traveling shifting lever

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 3, 2001 (2001.7.3)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Continued on the front page (72) Inventor Hitoshi Fukumoto 64 Ishizukita-cho, Sakai-shi, Osaka Inside Kubota-Sakai Factory (72) Inventor Eiichiro Kinoshita 1 Yatsukura, Tobe-cho, Tobe-cho, Iyo-gun, Ehime Prefecture In-house Technical Department (72 ) Inventor Minoru Matsuoka 1F, Yakukura, Tobe-cho, Iyo-gun, Ehime Pref.

Claims (1)

[Claims] 1. A seedling tray transport device for transporting a seedling tray containing seedlings is disposed at a front and rear intermediate portion between a traveling portion disposed at a front portion of the fuselage and a steering handle disposed at a rear portion of the fuselage. In a walking-type seedling transplanter that takes out seedlings from the seedling tray conveyed by the conveying device and implants the seedlings in a field, the seedling tray conveying device is detachably provided on a frame that connects the traveling unit and the steering handle, A rear end of an operating tool for operating the traveling section or the like is disposed behind the seedling tray transport device, and an operation guide of the operating tool is connected to the frame regardless of the detached state of the seedling tray transport device. A walking type seedling transplanter characterized by being provided so as to be always integrated.