JPH08130977A - Apparatus for processing stock - Google Patents

Abstract

PURPOSE: To provide an apparatus for processing a stock, equipped with a chucking machine, etc., for gripping a stem of a nursery stock, etc., readily compacted into a small size, improved in productivity and suitable for processing the nursery stock such as an eggplant into a stock. CONSTITUTION: This apparatus for processing a stock comprises a chucking machine 1 for gripping a stem of a nursery stock, a sensing part 2 for measuring the thickness of the nursery stock gripped with the chucking machine 1, a cutting part 3 for cutting the nursery stock gripped with the chucking machine 1 across at a prescribed position slightly above the 'gripped position', a drill part 4 for boring a nearly conical hole from the cut surface of the nursery stock cut with the cutting part 3 toward a root, a driving part 9 for successively relatively moving the chucking machine 1 to (i) a position 5 for gripping the nursery stock, (ii) a position 6 for cutting the nursery stock, (iii) a position 7 for boring the hole in the nursery stock and (iv) a position 8 for releasing the nursery stock and a controlling part for controlling the chucking machine 1, sensing part 2, drilling part 4 and driving part 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rootstock processing apparatus for processing eggplants and other seedlings (seedlings) into rootstocks, and a seedling chucking machine preferably used for a part thereof.

[0002]

2. Description of the Related Art Tomatoes, watermelons, melons, cucumbers, cucumbers, eggplants, etc. are seedlings of seedlings for the purpose of combating continuous cropping disorders, resisting diseases, increasing yield, dwarfing, etc. Grafted seedlings are often used instead of (see below). Taking tomatoes as an example, seedlings of eggplants (the ones that the true leaves have developed) are placed at predetermined positions (for example,
Make a rootstock by cutting it diagonally (just above the first cotyledon). On the other hand, a tomato seedling (developed with true leaves) is cut diagonally at a predetermined position (for example, immediately below the first cotyledon), and then the cotyledons are removed to form a scion.
The rootstock thus made and the scion are joined at the cut surface to complete one seedling. Wrap a tape around the joined part and fix it firmly. Thus, after several days, the cut surface (joint surface) is naturally connected and a grafted seedling is obtained.
Such grafted seedlings are needed in large quantities for mass production of tomatoes.

A plug-in method has been invented as a grafting method (see, for example, Japanese Patent Laid-Open No. 5-68432). In this method, instead of making a rootstock by cutting the seedlings (seedlings) at an angle, once the seedlings are cut transversely, from the cut surface of the cut seedlings toward the root, Make a rootstock by digging a "conical hole". On the other hand, for the spikes, instead of making the spikes by cutting the seedlings at an angle, once the seedlings are cut transversely, the lower end (near the cut surface) of the cut seedlings is “sharpened with a pencil. Make a spike by sharpening it like a cone. The rootstock 100A and the earstock 100B thus created are inserted into the "conical hole" of the rootstock to insert the "pointed lower end" of the earstock into a single seedling. After the insertion, the cut surfaces (joint surfaces) are naturally connected, and a grafted seedling (see FIG. 6) is obtained. This plug-in system has the advantage that the grafted seedlings can be obtained immediately and the yield of grafted seedlings is high because the positions of the conduits match.

[0004]

However, the plug-in type rootstock has a problem that it can hardly be manufactured by manual work. An object of the present invention is to solve this problem by mechanizing and automating the rootstock machining by the plug-in method.

[0005]

DISCLOSURE OF THE INVENTION As a result of earnest research, the inventor of the present invention has made a root stock processing apparatus capable of manufacturing a root stock with high productivity, and a seedling which is preferably used as a part of the root stock processing apparatus. Invented a chucking machine for the home. That is, the present invention is, firstly, "a chucking machine that grasps a sapling of a seedling, a detection unit that measures the thickness of a seedling grasped by the chucking machine, and a seedling that is grasped by the chucking machine from a" grasping position ". A cutting part that cuts transversely at a predetermined position slightly above, a drill part that digs a substantially conical hole from the cutting surface of the seedling cut by the cutting part toward the root, grab the seedling with the chucking machine Position, cutting position for cutting seedlings, position for digging holes in seedlings, drive unit for sequentially moving relative to a position for releasing seedlings, and a control unit for controlling the chucking machine, the detection unit, the drill unit and the drive unit. And a root stock processing device ”(claim 1).

Secondly, the present invention provides scissors for sandwiching a sapling between a pair of blades, which are "blades", and a straight line which is provided so as to overlap the scissors and divides the angle of spread legs of the pair of blades into two equal parts. A chucking machine for seedlings, which mainly comprises a slide plate that slides along L, and when the pair of blade portions aim at the center of the seedling and approach, the front end of the slide plate also approaches, and at this time, A chucking machine (claim 2), wherein the approaching amounts x1 and x2 of the blade portion 21 and the approaching amount y of the front end are equal to each other.

Thirdly, the present invention provides scissors for sandwiching a sapling between a pair of blades, which are "blades", and the scissors, which are vertically overlapped with each other and divide the leg opening angle into two equal parts. A chucking machine for seedlings mainly consisting of a slide plate that slides along a straight line L, wherein when the pair of blades is opened, the seedling is inserted between the spread legs to The seedling can be positioned by abutting against the front end, and the slide plate is provided with two substantially rectangular guide holes, and the straight lines passing through the guide holes in the longitudinal direction are 45 degrees each with the straight line L. On the other hand, pins are erected on the pair of blades, respectively, and these pins are fitted in the guide holes respectively, so that the pair of blades are closed. If you try to sandwich the seedling, The chucking machine is characterized in that the front end of the dove plate approaches the center of the sapling by an approaching amount y which is equal to the approaching amount of the pair of blades approaching each other toward the center of the sapling. Claim 3) is provided.

A fourth aspect of the present invention is an "apparatus processing apparatus according to claim 1, wherein the chucking machine is the chucking machine according to claim 2 or 3" (claim 4). I will provide a.

[0009]

The principle of the chucking machine according to the present invention (claims 2 to 4) will be described with reference to FIG. FIG. 5 shows a state in which the pair of blades 21 are opened and viewed from above. Sapling 10
0 indicates a cross section. When the pair of blades 21 approach the center O of the seedling 100 in order to grip the seedling, the front end of the slide plate also approaches.

At this time, in the chucking machine of the present invention, the approach amounts x1 and x2 of the blade portion 21 and the approach amount y of the front end are equal to each other. Therefore, the position of the center O of the seedling 100 is constant regardless of the thickness of the seedling. Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited thereto.

[0011]

EXAMPLE FIG. 1 is a schematic plan view of a rootstock processing apparatus (for eggplant seedlings) according to this example, as viewed from above. The device is
Mainly, a chucking machine 1 that grabs the stem of a seedling, a detection unit 2 that measures the thickness of the seedling grabbed by the chucking machine 1, a seedling grabbed by the chucking machine 1 at a predetermined position slightly above the "grasping position" A cutting part 3 for cutting the seedling transversely with a cutting part 3, a drill part 4 for digging a substantially conical hole from the cutting surface of the seedling cut by the cutting part 3 toward the root, a position 5 for gripping the seedling with the chucking machine 1, Position 6 to cut the seedling,
It comprises a drive unit 9 for sequentially moving the seedling into a position 7 for digging a hole and a position 8 for releasing the seedling, and a chucking machine 1, a detection unit 2, a drill unit 4 and a control unit (not shown) for controlling the drive unit 9. .

Next, each part will be described in detail. Four chucking machines 1 are evenly arranged on the rotary table 11 of the drive unit 9. FIG. 2 is a plan view (A) showing the chucking machine 1 and a sectional view (B) thereof. Chucking machine 1
Is a substantially L-shaped operation lever 16 and the lever 1
6, a substantially V-shaped relay lever 18 that abuts the tip of 6, a pair of scissors 22 that are connected to the lever 18 and sandwich the seedling 100 between a pair of blade portions 21 that are "blades", and that are stacked on the scissors.
And a slide plate 24 that slides along a straight line L that bisects the leg opening angle of the pair of blades 21. The blade 21 of the scissors 22 corresponds to the “blade” of the actual scissors, but the blade 21 is for holding the seedling 100 by sandwiching it instead of cutting an object like the actual scissors.

A substantially L-shaped operating lever 16 is provided on the rotary base 11.
It is rotatable around a fulcrum 15 fixed to the center of rotation and is urged clockwise by a spring 17. The tip of the lever 16 is in contact with the vicinity of the rotary shaft 18a at the position where it abuts the lower end of the V-shape of the substantially V-shaped relay lever 18. The relay lever 18 converts the rotational movement of the tip of the operation lever 16 into a linear movement, and makes an open leg movement and a closed leg movement about the rotation shaft 18a. The relay lever 18 is urged by a spring 19 toward the rotation center 10 of the rotary table 11.

The scissors 22 are fulcrums 2 fixed to the turntable 11.
With 0 as the center of rotation, the blade part 21 that hits the “blade” opens the leg,
Make a closed leg movement. The rear end of the handle portion corresponding to the “handle” of the scissors 22 is connected to the front end of the relay lever 18 at two places by a rotary shaft 22a. Therefore, the relay lever 18 and the scissors 2
The handle portion 2 is rotatable about the rotation shaft 22a. Therefore, when the substantially V-shaped relay lever 18 is opened, the handle portion of the scissors 22 is also opened, and as a result, the blade portion 2 of the scissors 22 is opened.
1 closes his leg. The opposite occurs when the lever 18 is closed. The sapling is caught near the tip of the blade 21 of the scissors 22.

Pins 23 are set up near the tip of the blade 21. A slide plate 24 is placed on the scissors 22 in an overlapping manner, and the slide plate 24 can slide on a straight line L passing through the rotation center 10 of the rotary table 11. A long rectangular guide hole 26 is formed in the middle of the slide plate 24 along the straight line L, and the rotary shaft 20 stands up in the guide hole 26. At the rear end of the slide plate 24 (in the direction of the rotation center 10 of the rotary table 11), there is also a substantially rectangular guide hole (strictly, not a hole) that is long along the straight line L. Stands up. With these two guide holes, the slide plate 24
Can slide without departing from the straight line L.

Around the tip of the slide plate 24 (in the outer peripheral direction of the rotary table 11), a chevron notch 28 having an angle of about 60 degrees is formed.
(The apex of the cut has a roundness with a radius of 3 mm). The chevron notches 28 are not always necessary and are provided merely to facilitate the insertion of seedlings. The apex of this cut constitutes the "front end" referred to in the present invention. When the tips of the blades 21 are closest to each other, they can be seen from above through this cut 28. At the tip of the slide plate 24, two elongated rectangular guide holes 25 are formed along the mountain shape. The straight lines penetrating the two guide holes 25 in the longitudinal direction intersect the straight line L at an angle of 45 degrees. This angle is important for the invention (claim 3). The pin 23 stands through the guide hole 25.

Next, the operation of the chucking machine 1 will be described. The outer end of the substantially L-shaped operation lever 16 is pushed in a predetermined direction (here, counterclockwise = the direction of the arrow in FIG. 2). Then, the tip (inner end) of the lever 16 rotates counterclockwise around the fulcrum 15 and pushes the apex of the substantially V-shaped relay lever 18. Therefore, the relay lever 18 opens while moving in the outer peripheral direction of the rotary table 11. Along with this, the handle portion of the scissors 22 connected to the relay lever 18 is also opened, and the blade portion 21 is also opened by its action. Therefore, the seedlings are pushed in until they come into contact with the back (front end) of the mountain-shaped notches 28 of the slide plate 24. By contacting this front end, the position of the center O of the seedling 100 is determined.

Then, pushing the outer end of the operating lever 16 in a predetermined direction is stopped. Then, the spring 17 causes the lever 16 to move.
Pull back in the clockwise direction (original position direction). This allows
The rear end of the lever 16 rotates clockwise around the fulcrum 15 and stops pushing the apex of the substantially V-shaped relay lever 18. As a result, the relay lever 18 is pulled back toward the rotation center 10 of the rotary table 11 by the spring 19, and at the same time, the relay lever 18 is closed. In accordance with this, the handle portion of the scissors 22 connected to the relay lever 18 is also closed, and the blade portion 21 is also closed by its action. The closed legs cause the two pins 23 to move toward each other. At this time, since the pins 23 are standing in the guide holes 25 of the slide plate 24, the movements (forces) toward each other cause the slide plates 24 to slide (forward) in the outer peripheral direction.

FIG. 6 is a diagram showing the principle of this chucking machine. The closing leg angle of the blade 21 differs depending on the thickness of the seedling. That is, the amount of approach x at which the two pins 23 approach each other x
1 and x2 (= x1) are different. If the sapling is thick, it does not come close, and if it is thin, it comes close. At this time, 2
Since the two guide holes 25 face the straight line L at an angle of 45 degrees, respectively, and the opening angle is small, the approach amounts x1 and x2 at which the blade portions 21 approach each other and the front end of the slide plate approaches the seedling. The quantity y is approximately equal. Therefore, the center O (core part) of the seedling is always in a predetermined position even if the seedlings having different thicknesses are grabbed. That is, the distance from the center O (core portion) of the seedling to the rotation center 10 of the turntable 11 is substantially constant.
As a result, by simply rotating the turntable 11, the chucking machine attached to the turntable 11 can position the sapling at the position 5 where the sapling is grabbed, the position 6 where the sapling is cut, the position 7 where the sapling is digged, Each can be accurately positioned at the releasing position 8.

Even when the seedlings are moved in a straight line without being rotated by the turntable 11, the position where the seedlings are grasped, the position where the seedlings are cut, the position where the seedlings are dug, and the position where the seedlings are released can be arranged in a straight line. Yes, all you have to do is translate the chucking machine. Therefore, the structure of the device is simplified. The detection unit 2 is composed of a light projecting unit 32 and a light receiving unit 33 provided on a mounting table 31 of the apparatus body as shown in FIG.

A slit is provided in the light projecting section 32, and a light beam 34 is emitted from the slit in parallel toward the light receiving section 33. A preamplifier is arranged in the light receiving unit 33, and only the light not blocked by the seedlings is incident on a predetermined position (pixel) of the linear sensor forming the light receiving unit 33. The thickness of the sapling is required depending on its position. The cutting portion 3 is composed of a fixed blade 35 having a sharp edge as shown in FIG.

The height position of the fixed blade 35 is slightly lower than the position where the seedlings are gripped by the chucking machine 1. Drill part 4
4, a drill motor 41 that rotates at an ultra-high speed as shown in FIG. 4, a drill blade 42 that is attached to the shaft of the drill motor 41 and digs a substantially conical hole, and a drill motor 41 that cuts the cutting direction of the drill. Is attached to a linear guide 43 that guides the vertical drive motor, a vertical drive motor 44 that vertically drives the drill motor 41 along the guide 43, and a plate 45 that moves together with the drill motor 41 to stop the vertical drive motor 44 at a predetermined position. And a plurality of limit switches 47 that are fixed to the apparatus main body and work corresponding to the plurality of docks 46.

The plurality of docks 46 are provided at a plurality of positions that are slightly displaced in the cutting direction (downward). The drive unit 9 includes a rotary base 11 to which the chucking machine 1 is attached, a bearing (not shown) that supports the rotary base 11, and the rotary base 1
1 includes a Geneva mechanism (not shown) for rotating 1 and a rotary table motor (not shown) for driving the Geneva mechanism.

The control unit controls the movements of the plungers 52 and 53, the detection unit 2, the drill unit 4 and the drive unit 9. Plungers 52, 53 for pressing the operation lever 16 at a position 5 for grasping the seedling and a position 8 for releasing the seedling are fixed to the mounting table 31 in the device. The plungers 52 and 53 have attachment / detachment pins 54 and 55 for actually pushing the operation lever 16 of the chucking machine 1, and these pins move up and down according to an instruction from the control unit.

Next, the operation of this apparatus will be described. The motor drives the Geneva mechanism in response to a command from the control unit to rotate the turntable 1
Rotate 1. As a result, when the chucking machine 1 moves to the position 5 for gripping the seedlings, the operation lever 16 comes into contact with and is pushed by the attachment / detachment pin 54 protruding from the plunger 52. At this time, the Geneva mechanism stops the rotation of the turntable 11 for a certain period of time.

The pushed operation lever 16 opens the blade portion 21 corresponding to the "blade" of the scissors as described above. This device is one side of the chucking machine 1 at this time (outer peripheral direction of the turntable 11).
There is a feature that it is easy to insert a seedling because it opens completely. Then, when the seedling is manually inserted into the cut 28, the detection unit 2 detects the insertion of the seedling, and the control unit drives the plunger 52 and lowers the attachment / detachment pin 54 in response to a signal from the detection unit 2.

When the attachment / detachment pin 54 is lowered, the operation lever 16 is disengaged from the attachment / detachment pin 54, and the operation lever 16 is returned to the original direction by the tension spring 17 (rotates clockwise in FIG. 2). When the operation lever 16 returns, the part 21 corresponding to the "blade" of the scissors is closed and the seedling is grabbed as described above. At the same time, the slider 24 slides in the outer peripheral direction of the turntable 11,
The center of the sapling is located.

At this time, as described above, the distance between the center of the seedling and the center 10 of the turntable 11 is equal regardless of the thickness of the seedling. Since the chucking machine 1 used here is mechanically configured without any electric mechanism such as a plunger or a motor inside, it is easy to be compact, and is unlikely to malfunction even if it is wet with washing water or saplings of seedlings. There are features.

Next, the thickness of the seedlings grasped by the chucking machine 1 is measured by the detection unit 2. The measurement is performed at the position 5 where the seedlings are grabbed at the command of the control unit.
The measured thickness of the seedling is used to set the depth of the hole to be drilled at the position 7 where the seedling is to be drilled later. In addition, it is also possible to use it for dividing the seedlings by the thickness at the position 8 after which the seedlings are released. Here, the thickness of the stem of the seedling is about 1 to 4 mm, so this is used in three steps to set the depth of the hole.

Here, an example of non-contact measurement by light was shown in order to measure the stem of a soft seedling without deformation. However, it is also possible to perform contact-type measurement using a probe with a small pressure. Since the detection unit 2 is provided in the non-contact type on the mounting table 31 of the apparatus main body, there is a feature that no wiring is required to pass through the rotary table 11 when the contact type is used.

Next, in response to a command from the control unit, the motor rotates the turntable 11, and the seedlings caught by the chucking machine 1 are
Move to position 6 for cutting the seedlings. There is a fixed blade 35, and the moving sapling crosses the fixed blade 35. As a result, the seedlings are cut transversely (upper and lower halves). The cutting position is a predetermined position slightly above the "position grasped by the chucking machine 1."

Here, the fixed blade 35 is used for cutting, but it is also possible to rotate the rotary blade for cutting. The seedlings move without stopping at position 6 where the seedlings are cut,
Come to position 7 to dig a hole in the sapling. Then, the turntable 11 stops rotating for a certain period of time by the Geneva mechanism. Since the distance between the center of the sapling and the center of rotation 10 is almost constant in the chucking machine 1 regardless of the thickness of the stalk, the center of the sapling is the drill part 4
Located just below the center of the conical blade 42 of the drill.

The conical blade 42 cuts from the cutting surface of the seedling toward the root. As a result, a substantially conical hole is dug.
Since the conical blade 42 rotates at an extremely high speed of 500 to 50,000 revolutions / minute (usually about 20,000 revolutions / minute), the soft seedling cells are cut without being crushed. The drilling motor 41 is guided by a linear guide 43, and is vertically moved by a vertical drive motor 44 along the guide.

When the drilling motor 41 moves along the guide 43, the plurality of docks 46 moving in the same direction come into contact with the plurality of limit switches 47 fixed to the mounting table 31. The plurality of docks 46 are respectively provided at a plurality of positions that are slightly shifted in the cutting direction (downward), and the docks 4 are arranged according to the data of the thickness of the seedlings measured by the detection unit 2.
The control unit selects an appropriate limit switch 47 corresponding to No. 6. As a result, the vertical drive motor 44 is stopped at each predetermined position according to the thickness of the seedling.

As a result, a hole having an appropriate depth corresponding to the thickness of the stem is opened in the seedling. When the cutting (drilling) is completed, the vertical drive motor 44 is driven in the opposite direction to return the drill motor to the original position. Next, the motor is rotated by the Geneva mechanism to the turntable 1.
The sapling that was rotated by 1 and caught by the chucking machine 1
Move to position 8 where the seedlings are released. There, the mounting table 31
There is a plunger 52 fixed to, and a detachable pin 55 projects upward. The attachment / detachment pin 55 contacts the operation lever 16, and the operation lever 16 is moved by the rotational force of the turntable 11 as shown in FIG.
Push counterclockwise. Here, the Geneva mechanism stops the rotation of the turntable 11 for a certain period of time.

The pushed operation lever 16 opens the blade portion 21, so that the sapling that has been grasped is released. As a result, the seedlings fall down and rootstocks are obtained. At this time, it is also possible to classify the seedlings by the thickness using the data of the thickness of the seedlings from the detection unit 2. The drive unit 9 converts the rotation of the rotary base motor into smooth intermittent rotation by the Geneva mechanism, positions the stop position with a ratchet, and detects the stop position with a photoelectric sensor. The detection signal of the photoelectric sensor is sent to the control unit. Then, the turntable motor is driven according to a command from the control unit to sequentially move the chucking machine 1 to a position 5 for grasping the seedling, a position 6 for cutting the seedling, a position 7 for digging a seedling, and a position 8 for releasing the seedling.

Here, the rotary table is smoothly intermittently rotated by the Geneva mechanism, but it is also possible to directly control the motor for the rotary table to smoothly rotate like the Geneva mechanism. In this way, the rootstock processed from the seedlings is grafted with another seedling (for example, tomato) having the lower end portion cut into a conical shape (spikes), and the bonding of the connection portion is completed in about 15 minutes. FIG. 5 is a diagram in which another seedling (spike) is grafted on the rootstock.

Since sap and chips are produced when the seedlings are processed, a sap cleaning device and a chip discharging device (not shown) are provided at the position 8 for cutting the seedlings and the position 7 for digging holes in the seedlings. ing.

[0039]

According to the present invention (Claims 1 and 4), since the rootstock can be mechanically manufactured for the first time, the productivity of the rootstock is significantly improved as compared with the manual labor. According to the present invention (Claims 2 to 4), the center of the seedling can be always grasped at a predetermined position of the chucking machine regardless of the thickness of the seedling, so that it is always possible to rotate the chucking machine so that The center of rotation of the blade and the center of the seedling can be matched.

The chucking machine (claims 3 and 4) is characterized in that seedlings can be easily inserted because one side of the chucking machine in the outer peripheral direction of the rotary table is completely opened. Further, since the chucking machine (claims 3 and 4) does not use an electric mechanism inside, the chucking machine is easy to be compact and has a characteristic that it is hard to break down even if it is wet with washing water or sap of seedlings.

In the embodiment, since the thickness of the seedling is measured by the detector, it is possible to dig a hole having an appropriate depth according to the thickness of the seedling.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an entire rootstock processing apparatus (for eggplant seedlings) according to an embodiment of the present invention as seen from above.

FIG. 2 is a plan view and a cross-sectional view showing a chucking machine.

FIG. 3 is a plan view showing the entire stock processing device.

FIG. 4 is a side view showing a drill unit.

FIG. 5 is a schematic plan view showing the principle of the chucking machine.

FIG. 6 is a perspective view in which a scion is grafted to a rootstock.

[Explanation of symbols]

1 chucking machine, 2 detector
3 Cutting part, 4 Drill part, 5 Position to grab seedlings, 6 Position to cut seedlings 7
Position to dig a hole in the sapling, 8 Position to release the sapling 9
Drive part, 21 blade part, 22 scissors,
23 blade pin, 24 slide plate,
25, 26 guide holes, 100 seedlings
100A Houki 100B Rootstock

Claims (4)

[Claims] 1. A chucking machine for gripping a sapling of a sapling, a detector for measuring the thickness of the sapling gripped by the chucking machine, and a predetermined position slightly above the "grasping position" for the sapling gripped by the chucking machine. A cutting part that cuts transversely at a position, a drill part that digs a substantially conical hole from the cutting surface of the seedling cut by the cutting part toward the root, a position to grab the seedling with the chucking machine, and a seedling A table composed of a cutting unit, a position for digging a hole in the seedling, a drive unit for sequentially moving the seedling to a position where the seedling is released, and a control unit for controlling the chucking machine, the detection unit, the drill unit and the drive unit. Wood processing equipment. 2. A pair of scissors for sandwiching a sapling between a pair of blades corresponding to a "blade", and slides along a straight line L which is provided so as to overlap the scissors and bisects an opening angle of the pair of blades. In a chucking machine for seedlings mainly consisting of a slide plate that moves, when the pair of blade portions approach the center of the seedling, the front end of the slide plate also approaches, and at this time, the blade portions approach each other. A chucking machine characterized in that the amounts x1 and x2 are equal to the approaching amount y of the front end. 3. A pair of scissors for sandwiching a sapling between a pair of blade portions corresponding to a “blade” and a pair of scissors, which slides along a straight line L that bisects an opening angle of the pair of blade portions. In a seedling chucking machine mainly consisting of a slide plate, when the pair of blades are opened, by inserting the seedling between the open legs and contacting the front end of the slide plate. The seedlings can be positioned, the slide plate is provided with two substantially rectangular guide holes, and straight lines that penetrate the guide holes in the longitudinal direction intersect the straight line L at an angle of 45 degrees, respectively. On the other hand, pins are set up on the pair of blades, and these pins are fitted into the guide holes, so that the pair of blades is closed to try to sandwich the seedling. In this case, the front end of the slide plate is The chucking machine is characterized in that the pair of blades aim at the center of the sapling and approach each other by an approaching amount y equal to the amount of approaching each other toward the center of the sapling. 4. The rootstock processing apparatus according to claim 1,
An apparatus, wherein the chucking machine is the chucking machine according to claim 2 or 3.