JPH104794A - Seedling root cutting machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To realize a root cutting machine that can mechanize the operation of placing seedlings on a rake plate in addition to root cutting. SOLUTION: A cutting device B for cutting a root by pushing a cutting blade between a mat seedling W wound up by a lifting means and a nursery box 1, and a seedling for replacing the root-cut mat seedling W on a rake plate. A rooting machine for seedlings is provided including a mounting device, a scooping plate feeding device E for automatically supplying a rake plate, and a separating device for separating the empty seedling box from which the mat-shaped seedlings W have been taken out. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a root cutting machine for mat-like seedlings grown in a nursery box, and more particularly, to placing seedlings in a nursery box so that the seedlings can be easily taken out of the nursery box. The present invention relates to a machine for cutting a root entangled with a surface.

[0002]

2. Description of the Related Art When a mat-shaped seedling is grown in a nursery box, the root of the seedling is entangled and adheres to a drainage hole formed in the bottom of the box. Since a considerable amount of labor is required, it cannot be sufficiently covered by manual work.
No. 6107 proposes a machine for driving and cutting roots of seedlings attached to a nursery box.

[0003]

The mat-shaped seedlings from which the roots have been cut are taken out of the seedling raising box and placed on a seedling scooping plate, for example, in order to carry the seedlings to a rice transplanter at the ridge for replenishment. Therefore, in the above-mentioned proposed technique, the operation of placing the root-cut mat-shaped seedlings from the nursery box on the seedling rake board still relies on human power. An object of the present invention is to realize a root cutting machine that can mechanize an operation of placing a seedling on a rake plate in addition to root cutting.

[0004]

[Means for Solving the Problems]

[Constitution] The first invention is a cutting method in which a cutting blade is pushed between a seedling box and a mat-shaped seedling grown by the cutting blade to drive and cut the root of the lower mat-shaped seedling from the seedling mounting surface of the seedling raising box. An apparatus, a seedling placing apparatus for placing a mat-shaped seedling whose roots have been cut on a seedling rake board, and a scooping plate supply apparatus for supplying the seedling rake board to the seedling placing apparatus.

According to a second aspect of the present invention, in the first aspect, there is provided a separating device for separating the seedling rake plate on which the mat-shaped seedlings are placed and the empty nursery box from which the mat-shaped seedlings are taken out. Is the feature.

A third invention is the first or second invention, wherein
The cutting device, lifting means for forcibly lifting one end of the mat-shaped seedling grown in the seedling raising box from the seedling raising box, and pushing the cutting blade between the upper and lower sides of the mat-shaped seedling and the seedling raising box whose one end has been lifted. Cutting means for driving and cutting the lower side of the mat-shaped seedling from the seedling mounting surface of the seedling raising box.

According to the first aspect of the present invention, the mat-shaped seedlings whose roots have been cut by the cutting device and which are entangled in the nursery box are
Because the seedling mounting device puts it on the seedling rake board,
This means that both the root cutting of the seedlings and the transfer of the seedlings to the rake plate were mechanized. And the scooping plate supply device can also mechanize the supply operation of the seedling rake plate required in the seedling placing device.

When a mat-shaped seedling whose roots have been cut is replaced on a seedling rake board, the seedling rake board on which the seedlings are placed and the nursery box from which the seedlings are taken out and emptied are, for example, The subsequent handling is different, such as being transported to a place for shipment, and the empty nursery box being transported to an empty box collection unit. Therefore, according to the configuration of the second aspect, the separating operation of the seedling rake plate on which the mat-shaped seedlings are placed and the empty box, which is naturally required, is mechanized by the separating device.

According to the third aspect of the present invention, one end of the mat-shaped seedling in the seedling raising box is turned up by the lifting device, and the cutting blade is pushed into the cut-up portion by the cutting device so that the root can be driven and cut. become. That is, claim 1
Or, according to the configuration of 2, as in the proposed technique described above, a seedling box may be required in which the side wall at one longitudinal end is missing, but in the present invention, the cutting blade is Since it functions so that insertion can be performed, root cutting can be performed using a conventional nursery box in which a total of four front, rear, left, and right side walls are integrated with a rectangular seedling mounting surface. And
Since the mat-shaped seedlings whose roots are entangled in the nursery box by the cutting device are placed on the seedling rake plate by the seedling placing device, the rooting of the seedlings to the seedling rake plate is performed using the conventional seedling box. The transfer operation can be mechanized.

[Effect] As a result, the root cutting machine according to any one of claims 1 to 3 can (1) cut the roots of the seedlings in the seedling raising box and cut the rooted mat-shaped seedlings into a rake plate. Of the reloading work and the mechanization of the seedling rake plate supply work,
The root cutting work has become more convenient and efficient.

In the root cutting machine according to the present invention, in addition to the above-mentioned effect (a), (b) the operation of separating the seedling rake plate on which the mat-shaped seedlings are placed from the empty box can be mechanized. Was able to further promote automation.

In the root cutting machine according to the third aspect of the present invention, (c) the above-mentioned effect can be obtained by raising the seedling end and pushing the cutting blade into an economical state in which a conventional seedling raising box can be used. There are advantages.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, a scooping plate feeding device E capable of continuously supplying a seedling rake plate H, a cutting device B for cutting the roots of a mat-shaped seedling W in a seedling raising box 1, and a mat-shaped seedling whose roots have been cut A seedling placing device C for taking out the W from the nursery box 1 and replacing it on the seedling rake plate H; a separating device D for separating the seedling rake plate H on which the mat-shaped seedling W is placed from the empty seedling box 1;
1 shows a seedling root cutting machine including a placement section A on which a seedling raising box 1 is placed. The mounting portion A is configured by laying a mounting frame 4 over the main body frame 2 and the legs 3, and the nursery box 1 having a mat-shaped seedling W grown to some extent is mounted thereon.

First, the general operation of the root cutter except for the scooping plate feeding device E will be described. First, as shown in FIG. put,
Then, the cutting section B is operated by turning on a switch or the like. Then, the drum 12 rotates in the direction of arrow A, and the cutting blade 6 wound therearound starts to move forward with the seedling rake plate H, and the first cam 16 rotates to move the operated lever 18. Kick-up, as shown in FIG.
3 is swung down and thrust into the rear end of the mat-shaped seedling W (hook mechanism a). At this time, the lifting prevention mechanism d functions to maintain the shape of the quadruple link mechanism c in the side view at that time, and the pivot 19 to which the operated lever 18 is attached does not escape upward, and the hook The member 13 protrudes into the seedling.

[0015] Then, as shown in FIG.
7 kicks down the upper arm 22 and moves the quadruple link mechanism c in a direction in which the vertical length thereof is compressed, so that the hook-like member 13 is lifted up to forcibly lift and raise the seedling end. (Elevating mechanism b and lifting assist mechanism h). In the rolled-up state, the cutting blade 6 with the rake plate H comes into contact between the mat-shaped seedling W and the seedling mounting surface 1a (see FIG. 9). The cutting blade 6 advances while cutting the root to the front end of the seedling raising box 1 (see FIG. 10).

The cutting blade 6 advances to the front end of the nursery box 1 [FIG.
(See (b)), the drum 12 rotates in the reverse direction in the direction of arrow B to take up and move the cutting blade 6, and the mat-shaped seedling W with the root entanglement with the seedling raising box 1 released is placed on the seedling rake plate H. The cutting blade 6 remains in the seedling raising box 1 in the mounted state, and only the cutting blade 6 returns (moves backward). At this time, only the drum shaft 11 is reversely rotated by the one-way clutch 21 mounted on the first cam shaft 14, and the pull-out promoting mechanism e (see FIG. 9) functions to maintain the posture of the hook-shaped member 13. As a result, the mat-shaped seedling W easily comes off from the hook-shaped member 13. Then, the drum 12 rotates backward to the original position, and the cutting blade 6 returns to the standby position. When the seedling rake plate H is operated, the mat-shaped seedling W is moved to the seedling raising box 1.
It can be taken out from. At this time, each of the mechanisms a to e and h also returns to the original standby state.

Then, as shown in FIG.
Is operated, the seedling rake plate H on which the mat-shaped seedlings W are placed is inserted into the rear end of the holding frame 63 (see FIG. 16), and the first support 58 on the front side is moved forward to drop the empty seedling raising box 1A. , Is moved to the empty box collecting section 64 by sliding movement.
Automation of a series of steps from the supply of the seedling rake plate H to the replacement of the mat-shaped seedlings W whose roots have been cut onto the seedling rake plate H and the collection of the empty box 1A are achieved. Next, the structure of each part will be described.

As shown in FIGS. 6 to 11, the cutting device B includes a lifting device 5 for forcibly lifting and turning one end of the mat-shaped seedling W of the seedling raising box 1, and a mat-shaped seedling W having one end lifted. A cutting device 7 which pushes the cutting blade 6 between the upper and lower sides of the seedling raising box 1 to drive and cut the root of the lower mat-like seedling from the seedling placing surface 1a of the seedling raising box 1; And a drive mechanism 8 for supplying the power to the main body frame 2. The drive mechanism 8 includes an electric motor 9 and a gear mechanism 10, and the gear mechanism 10 transmits a gear to a drum shaft 11 described later.

As shown in FIG. 13, the cutting means 7 is equipped with two flexible cutting blades 6 made of metal such as spring steel wound in parallel on a drum 12 having a drum shaft 11. It is configured. The cutting blade 6 has a length sufficient to reach the box end of the seedling raising box 1 placed on the mounting portion A, and the end portion thereof is fixed to the drum 12. When the drum shaft 11 is driven to rotate forward in the direction of arrow A, the cutting blade 6 is unwound from the drum 12 and protrudes in the direction of the mounting portion A. When the drum shaft 11 is driven to rotate in the direction shown by arrow B, the cutting blade 6 is wound around the drum 12 and stored.

As shown in FIGS. 13 and 14, the cutting blade 6 is formed by arranging two very thin (t = 0.5) spring steels on the left and right side in parallel, and near the leading end thereof in the pushing movement direction. A raised portion 6R formed by partially cutting and raising the cutting blade 6 so that the side is raised upward is formed on the left and right.
That is, the raised portion 6R has a claw shape having the rear inclined surface 6a and the front pressing portion 6b.

Also, as shown in FIGS.
An upper guide roller 40 urged in the direction of pressing the seedling rake plate H downward and a lower guide roller 41 fixed in position are disposed at both left and right ends immediately before the drum 12 in the middle of the pushing movement path. I have. Upper guide roller 40
Is pressed and urged toward the lower fixed roller 41 by a tension spring 42 acting on the rotation axis thereof.
Is prevented from moving upward from the cutting blade 6.

On the other hand, on the left and right sides of the longitudinal end of the seedling rake plate H, claw holes 43 for engaging the raised portions 6R of the cutting blade 6 are formed, and when the cutting blade 6 is retracted. Escape groove 44 for avoiding interference with raised portion 6R
Is continuously formed from the claw hole 43 to the rear end of the seedling rake plate H. Also, the left and right ends of the stepped handle portion 45 at the rear end of the seedling rake plate H are notched to allow passage of the guide roller 40, and the seedling rake plate H passes over the guide roller 40 when the cutting blade 6 is completely pushed. It is possible to proceed.

As described above, as shown in FIG. 6, the tip of the seedling rake plate H is placed on the drum 12 and
Is started, the raised portion 6R engages with the claw hole 43 and is pushed and moved in an integrated state with the seedling rake plate H on its back, and pushes up and down between the upper and lower guide rollers 40 and 41 to pass therethrough. Then, it rushes between the raised seedling and the nursery box 1 (see FIGS. 7 and 8). When the cutting blade 6 reaches the front end of the seedling raising box 1 while cutting the root, the mat-shaped seedling W is replaced on the seedling rake board H at that time. A cutting device 7 having a structure in which the blade 6 moves also serves as a seedling placing device C (see FIGS. 9 and 10).

When the cutting blade 6 is retracted and moved, as shown in FIG. 14, the raised portion 6R and the seedling rake plate H
Therefore, only the cutting blade 6 returns. Therefore, the pushing movement force is transmitted to the seedling rake plate H when the cutting blade 6 is pushed and moved by the raised portion 6R and the claw hole 43, and is pulled into the seedling rake plate H when the cutting blade 6 is pulled and moved. A one-way transmission mechanism i that functions so as not to transmit the moving force is configured.

As shown in FIGS. 11 and 12, the lifting device 5 is provided with a hook mechanism a, a lifting mechanism A mechanism b, a posture maintaining mechanism f, and a lifting assisting mechanism h are arranged, and a lifting prevention mechanism d and a pull-out facilitating mechanism e are provided outside of the other (the right side if the placing section A is a machine front). It is arranged and configured.

As shown in FIG. 11, a first camshaft 14 having a first cam 16 mounted on a drum shaft 11 has a first
Second camshaft 1 having second cam 17 mounted on camshaft 14
5 are arranged respectively, and the shafts 11, 14, 15 are gear-linked, and the first and second cams 16, 17 are
A transmission mechanism g for transmitting power to the motor is constituted. A quadruple link mechanism c in front of the second camshaft 15 includes an upper arm 22 swingable about a fulcrum X1, a lower arm 23 swingable about a fulcrum X2, and a pair of upper and lower arms 22, 23. And a movable lever 24 pivotally connected therewith. The lower arm 23 and the movable lever 24 are pivotally connected,
In addition, both the lower arm 23 and the movable lever 24 are provided with a pivotal shaft 19 that is rotatable relative to each other, and the plurality of hook-shaped members 13 and the operated lever 18 are integrally attached to the pivotal shaft 19. is there.

The hooking mechanism a has a structure in which the first cam 16 kicks up and comes into contact with the operated lever 18 to rotate the pivot 19 in the direction in which the hook-shaped member 13 swings downward. . The elevating mechanism b has a structure in which the second cam 17 kicks down and contacts the root end of the upper arm 22 to lift and move the movable lever 24. In other words, the hook-shaped member 13 swings down around the pivot shaft 19 whose axis is fixed by the hooking mechanism a, and the four-way link mechanism c reduces its vertical length by the elevating mechanism b. The hook-shaped member 13 is lifted and moved upward by moving in the direction in which it moves.

Further, the working lever 37 pivotally supported by the fulcrum X3 at the upper rear portion of the main body frame 2 and the tip of the operated lever 18 are connected by a connecting link 38, and contact with the longitudinal middle portion of the working lever 37. The lifting assist mechanism h is configured by attaching the applicable roller 39 to the second cam 17. This is because when the second cam 17 pushes the upper arm 22 downward, the roller 39 also pushes the action lever 37, and the hook-shaped member 13 is raised in parallel by the elevating mechanism b, and simultaneously the pivot shaft 19 is further moved. It is slightly rotated in the direction of arrow C. As a result, not only is the wobble of the hook-shaped member 13 prevented,
The complex movement moves upward while being stabbed and swayed by the seedling W, and functions to reliably lift and turn the seedling.

As shown in FIG. 12, the lifting prevention mechanism d includes a third cam 25 attached to the first camshaft 14, and an upper right arm 26 that can swing around the fulcrum X1. That is, during the operation of the hook mechanism a, the first camshaft 14
When the arc surface 25a of the third cam 25 centered at the center and the root-side protruding end 26a of the upper right arm 26 contact each other,
The upward movement of the quadruple link mechanism c, that is, the pivot shaft 19 is prevented. Therefore, when the hook-shaped member 13 descends and swings, the pivot shaft 19 does not escape upward and cannot enter the seedling W properly.

The pull-out facilitating mechanism e is composed of a fourth cam 27 attached to the second cam shaft 15 and a regulating arm 28 attached to the pivot 19. That is, before winding the cutting blade 6 by rotating the drum 12 in the reverse direction, it is necessary to lift the hook-shaped member 13 upward to separate it from the mat-shaped seedling W, so that the cutting blade 6 is terminated. In the vicinity of the state in which the hook-shaped member 13 is rushed and moved to above, the hook-shaped member 13 floating above the mat-shaped seedling W placed on the seedling rake board H is suspended in the air while the cutting blade 6 is being wound. Floating hook-shaped member 1
Make sure that 3 does not fall. In other words, the function of maintaining the pivot shaft 19 so as not to rotate in the direction of arrow C is exhibited, and the cutting blade 6 can be smoothly wound up without falling by its own weight and the hook-like member 13 entering the mat-shaped seedling W. It is.

Further, there is provided a posture maintaining mechanism f for preventing the first camshaft 14 equipped with the one-way clutch 21 from rotating from the predetermined standby position (start position) when the drum 12 rotates in the reverse direction. is there. As shown in FIG. 11, the locking pin 29 deviated from the first camshaft 14 is
A bracket 31 bolted to the side surface of the cam 16 and bolted to the main body frame 2 at a position above and behind the first camshaft 14
A tension spring 32 spans the first and second locking pins 29, and a claw arm 34 which is urged by a return spring 33 so as to prevent the first cam 16 from rotating in the reverse direction (in the direction of arrow D); Notch 35 formed in one cam 16
(Which can be engaged with the tip of the claw arm 34) to form a posture maintaining mechanism f.

That is, as shown in FIGS. 6 and 11, when the ratchet mechanism 36 is engaged and the start piece 16a of the first cam 16 is located immediately below the operated lever 18, the start operation is started. The locking pin 29 is located below the first camshaft 14, and the first cam 16 is urged and maintained such that the notch 35 urges and contacts the tip of the claw arm 34. Therefore, despite the presence of the one-way clutch 21, the rotation of the first camshaft 14 due to the reverse rotation of the drum 12 is reliably prevented, and the operation is started by rotating the drum 12 in the forward direction. Sometimes the first cam 16, that is, the lifting device 5, is adjusted to the normal start position.

Next, a scooping plate feeding device E for supplying a seedling rake plate to the seedling placing device, a seedling rake plate H on which a mat-shaped seedling is placed, and an empty nursery box 1 from which the mat-shaped seedling is taken out. A separation device D for separating the above will be described.

As shown in FIGS. 1, 2 and 5, the scooping plate feeding apparatus E includes a mounting table 46 on which a large number of seedling rake plates H are stacked one above the other, and a topmost seedling rake plate H. Cutting device 7
And a supply mechanism 47 that feeds out the supply mechanism 47.
The mounting table 46 is mounted inside the mounting frame 48 so as to be able to move up and down by front and rear rollers 51 and is urged upward by a spring 49. A seedling rake plate H is provided at the rear of the mounting frame 48.
The door 50 for loading is swingably opened and closed.
At the upper end of the mounting frame 48, a plurality of guide rollers 52 for determining the upper limit position of the seedling rake plate H at the uppermost stage and serving as a guide at the time of feeding are provided.

The supply mechanism 47 includes a first chain 53 interlocked with the drum shaft 11 and left and right second chains
When the drum shaft 11 rotates in the reverse direction, the handle 45 of the seedling rake plate H at the uppermost stage
And is fed out to the drum 12 side. When the reverse rotation of the drum 12 is completed, the transmission ratio is set such that the tip of the seedling rake plate H comes to a position almost coincident with the tip of the cutting blade 6. 6 carries the seedling rake board H on his back.

When the seedling rake plate H at the top is paid out,
The next seedling rake plate H becomes the uppermost stage by the spring 49.
A wire 56 passing through a spring 49 is connected to the mounting table 46, and a handle 57 capable of winding the wire 56 is provided on the main body frame 2. In other words, when the seedling rake plate H runs out, the handle 57 is turned to pull down the mounting table 46 against the spring 49, and then the door 50 is opened to load the seedling rake plate H onto the mounting table 46.

As shown in FIG. 15 and FIG.
Is composed of a horizontal transfer mechanism j and a recovery mechanism k.
The lateral transfer mechanism j is provided with a gripping frame 63 in the form of a tuning fork in a horizontal direction when viewed from the rear.
At the left side of the rear end of the mounting frame 4 in a state in which it can be driven and retracted by a first actuator 62 having a rack and pinion structure. That is, the operation is performed when the root cutting is completed and the seedling rake plate H is placed on the seedling raising box 1. When the gripping frame 63 moves from the left side to the right side, the rear end portion of the seedling rake plate H is moved. , From the side (see FIG. 3).

The collection mechanism k includes a first support 58 on which the front end of the seedling raising box 1 is mounted, a second support 59 on which the rear end is mounted, and the slide table 6.
0 is provided on the mounting frame 4 and the first support 58 is moved by the second actuator 61 such as an electric cylinder.
It is configured such that it can be driven and moved between an operation position for supporting the seedling raising box 1 and a retreat position moved forward. That is, if the first support 58 is moved forward, the seedling raising box 1 falls and slides down the slide table 60, and the empty box 1 </ b> A can be collected in the collecting part 64.

The operation of the entire separation device D is shown in FIG.
As shown in (a) and (b), first, the gripping frame 63 protrudes and engages with the rear end of the seedling rake plate H.
As shown in FIG. 5, when the first support 58 is moved forward and the seedling raising box 1 of the shell is dropped, the seedling rake plate H is thereby held.
16 in a cantilevered state.
As shown in (c), the holding frame 63 is further protruded and moved to transfer the seedling rake plate H to the conveyor 65, and then the holding frame 6 is moved.
3 moves in and out, and so on.

As shown in FIG. 4, the seedling mounting surface 1 of the nursery box 1
a is both ends in the longitudinal direction of the box (about 100 mm from the end)
The draining hole 1b is omitted to form a flat surface so that the root is not entangled with the draining hole 1b. Thus, the lifting movement of the seedling end by the hook-shaped member 13 can be easily performed.

[Alternative Embodiment] As shown in FIGS. 17 to 20, a flat-shaped seedling rake plate H is used, and both the horizontal transfer mechanism j and the mounting table 46 are forcibly moved downward by the electric motor 9.
A root cutter that is driven by a motor may be used. That is, if only the differences from the present embodiment are described, first, the portion pushed by the claw 54 of the second chain 55 is the rear end of the seedling rake plate H. The power of the electric motor 9 is transmitted to the gear mechanism 10 via the first electromagnetic clutch 70, to the rack and pinion mechanism 72 for moving the gripping frame 63 through the second electromagnetic clutch 71, and to the third electromagnetic clutch 73. A power transmission system is configured to transmit the power to the take-up drum 74 for lowering the mounting table 46 via the mounting table 46.

That is, when the drum 12 rotates forward and backward, only the first electromagnetic clutch 70 is connected, and then only the second electromagnetic clutch 71 is connected to operate the lateral transfer mechanism j. When the seedling rake plate H has run out, only the third electromagnetic clutch 73 is connected and the mounting table 4
6 is forcibly lowered.

By using the seedling raising box 1 whose one end can be opened, the cutting means 7, the seedling placing device C, and the scooping plate feeding device E
And a root cutter without the lifting means 5 may be configured.

[Brief description of the drawings]

FIG. 1 is an overall side view of a root cutter.

FIG. 2 is a plan view of a root cutter.

FIG. 3 is a plan view showing a separation device.

FIG. 4 is a perspective view of a nursery box.

FIG. 5 is a side view showing the structure of the scooping plate supply device.

FIG. 6 is a side view of the root cutter in a standby state.

FIG. 7 is a side view of the root cutting machine in a state where the hook-like member has protruded into the seedling.

FIG. 8 is a side view of the root cutting machine in a state where a seedling end is turned up.

FIG. 9 is a side view of the root cutter in a state where the cutting blade has entered deeply.

FIG. 10 is a side view of the root cutter with the cutting blade largely moved back;

FIG. 11 is a side view of the left side of the frame showing the structure of the cutting portion.

FIG. 12 is a side view of the right side of the frame showing the structure of the cutting portion.

FIG. 13 is a perspective view showing the relationship between a cutting blade and a rake plate.

FIG. 14 is a sectional side view showing an engagement structure between a cutting blade and a rake plate.

FIG. 15 is an operation diagram showing an empty box collecting operation by the collecting mechanism.

FIG. 16 is an operation diagram showing a rake plate lateral transfer operation by the lateral transfer mechanism.

FIG. 17 is a side view of a main part showing a scooping plate supply device having another structure.

FIG. 18 is a plan view of the root cutter shown in FIG. 17;

FIG. 19 is a system diagram showing a transmission system of the root cutter shown in FIG. 17;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nursery box 1A Empty box 5 Lifting means 6 Cutting blade 7 Cutting means B Cutting device C Seedling device D Separation device E Scooping plate feeding device H Seedling rake plate W Mat-shaped seedling

Claims (3)

[Claims] A cutting device for pushing a cutting blade between upper and lower sides of a seedling box and a mat-shaped seedling grown thereby to drive and cut a root of the lower mat-shaped seedling from a seedling mounting surface of the seedling raising box; A root cutting machine for a seedling, comprising: a seedling placing device for placing a mat-shaped seedling whose roots have been cut on a seedling rake plate; and a scooping plate supply device for supplying the seedling rake plate to the seedling placing device. 2. A seedling rake plate on which a mat-like seedling is placed,
2. The root cutting machine for seedlings according to claim 1, further comprising a separation device for separating the mat-shaped seedlings from the empty seedling raising box. 3. A raising means for forcibly lifting one end of a mat-shaped seedling grown in a seedling box from the seedling box, and a vertical movement between the mat-shaped seedling whose one end is raised and the seedling box. 3. A root cutting machine for a seedling according to claim 1, further comprising cutting means for driving and cutting the root of the lower mat-like seedling from the seedling mounting surface of the seedling raising box by pushing a cutting blade into the cutting blade.