JPH07284336A - Apparatus for grafting young seedling - Google Patents

Abstract

PURPOSE:To carry out the smooth cutting and joining of a scion to a stock in an apparatus for grafting capable of continuously performing the grafting of young seedlings. CONSTITUTION:This apparatus for grafting young seedlings is obtained by installing an auxiliary cutter (E) for precutting off a true leaf part (h) of a stock seedling (n) before cutting off the side of an ear of the stock seedling (n) with a cutter, removing the part of the unnecessary true leaf (h) present on the ear side of the stock seedling (n) with the auxiliary cutter (E) and then cutting off the ear side of the stock seedling (n) with the cutter and carrying out the joining treatment of the cut end of the stock to that of the scion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grafting device for automatically grafting vegetables such as tomato, eggplant and watermelon, or seedlings such as flowers.

[0002]

2. Description of the Related Art In the cultivation of fruit and vegetables, grafting of seedlings has generally been carried out manually, but recently, researches on mechanization of grafting of these seedlings and labor saving have been actively conducted.
And among them, as what can be grafted continuously,
A grafting device described in JP-A-6-38630 has been proposed.

[0003]

The grafting device described in the above publication is considered to be capable of efficient grafting because it is a system for grafting continuously one by one. But,
In this grafting device, on the one hand, a scion cutting device and a root cutting device are separately provided, and the scoop and the root are separately cut out by these both cutting devices. Therefore, according to this device, two cutting devices, which are the main parts, are required, which raises the cost of the entire device. Further, when two cutting devices are separately provided in this way, it is difficult to adjust the attachment of the cutting devices. If the height or the cutting direction of the scion cutting device and the root cutting device are different, the scoops after cutting and The angles, directions, and positions of the cut edges of the rootstocks deviate from each other, which causes a problem that smooth joining cannot be performed.

Therefore, as a means for solving the above drawbacks,
The inventors of the present invention have developed the grafting device described below. That is, this grafting device basically cuts the scion and the rootstock by one cutting device, and one scissor cut from the scion seedling is the other rootstock cut by the same cutting device by the clamper. Are joined to each other and the joined state is held by a clip. In this way, cutting the spikes and rootstocks with a single cutting device can be more cost-effective than the one with separate cutting devices, and cuts the spikelets and rootstocks from the spikelet seedlings and rootstock seedlings. In this case, the angle and the direction of the joint surface (cut) are always constant, and the joint can be facilitated. Moreover, according to this device, the cuttings are cut out by the cutting device while being held by the clamper, and the cut out cuttings are moved to the rootstock seedling side together with the cutting device while being held by the clamper as they are. After cutting with the cutting device, the clamper is lowered to join the cut ends of the scion and the rootstock. Therefore, the positions of the scion and the rootstock are always constant, and the cut ends of the rootstock and the rootstock can be reliably matched.

However, this grafting device cuts off the scion and the rootstock with a single cutting device on the one hand, and moves the cutout scrubbing device to the rootstock seedling side together with the cutting device while sandwiching it with a clamper. Therefore, before and after cutting the rootstock, the main leaves of the rootstock seedlings that are widely spread easily interfere with the spikes that are sandwiched by the clamper and located above the rootstock seedlings. If you touch the cut end of the scion, the seedling posture of the scoop pinched by the clamper will be disturbed.After that, even if you try to lower the clamper to join the scion and the rootstock, the cut ends do not match and the splice is incorrect. There is a problem that causes. Similarly, when the rootstock of the rootstock seedling contacts the scion, the rootstock seedling falls and the stems of the rootstock seedling cannot be properly pinched when cutting the rootstock seedling, resulting in an error in cutting the rootstock. There is a problem called.

Further, in any of the grafting devices described above, the ear side of the rootstock seedlings cut by the cutting device while leaving the rootstocks is completely useless thereafter and is dropped outside the device, for example, by dropping it downward. . Then, when the true leaves on the ear side of the rootstock seedlings grow too much in the process of raising seedlings and spread widely to the left and right, when supplied as rootstock seedlings to the grafting device, the true leaves are often found in each part of the grafting device. Entanglement, and once entangled, there is the problem that the device must be stopped and removed. Also, in the cutting / joining process, if the true leaves come into contact with these devices or become entangled with downstream seedlings to be cut in the next process, the seedling posture of the rootstock seedlings will be disturbed and cutting of the rootstock seedlings will occur. There is a problem that you can not do it. Therefore, it is an object of the present invention to provide a grafting device capable of reliably joining a scion and a rootstock in any grafting device and efficiently grafting seedlings.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention cuts off the root side of a scion seedling and the side of a rootstock seedling with a cutting device, and cuts out one scion with a clamper. Joined to the rootstock of, and holding the joined state,
Alternatively, in a grafting device for seedlings held by an adhesive, an auxiliary cutting device is provided for cutting the true leaf portion of the rootstock seedling in advance before cutting off the ear side of the rootstock seedling by the cutting device. After removing the unnecessary true leaf portion on the ear side of the tree seedling, the ear side of the rootstock seedling is cut off by the cutting device, and the cut end of the rootstock is joined to the cut edge of the rootstock. Further, the auxiliary cutting device is provided on the upstream side of a conveyor belt that supplies rootstock seedlings in a row toward the cutting device, and is conveyed by rotary cutting blades provided on both left and right sides of the seedling conveying passage of the conveyor belt. The feature is that the unnecessary true leaves of the rootstock seedlings are cut out continuously.

[0008]

With the above-mentioned structure, the root cuttings having the true leaves that are widely spread to the left and right are cut in advance by the auxiliary cutting device to be supplied to the cutting device. And
The scion seedlings and rootstock seedlings are cut into scion and rootstocks by a cutting device, one of the cut scoops is joined to the other rootstock by a clamper, and the joint part is held by a holder or an adhesive. To be done. The true leaf cut by the auxiliary cutting device is removed outside the device on the spot. In addition, the auxiliary cutting device is provided on the upstream side of the conveyor that supplies the rootstock seedlings in a line toward the cutting device, and reliably cuts the true leaf portions of the rootstock seedlings one by one. Then, the left and right cutting blades provided on both sides of the transport passage sandwich the transporting seedlings and continuously cut off the unnecessary true leaf portions.
Therefore, except for the stems necessary for the rootstock and the true leaves that are not partially expanded, the rootstock seedlings become lighter by cutting off most of the unnecessary true leaves, and they are deployed in the subsequent cutting and joining processes. The true leaves do not become entangled with the device or adversely affect the grafting process.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the entire grafting device 1, 2 is a scion seedling stocking device, and 3 is a rootstock seedling stocking device. Reference numeral 4 is a seedling carry-in device provided on the scion seedling stocking device 2 and the rootstock seedling stocking device 3, and the seedling carrying-in device 4 is a scion seedling carrying block 6 on the carrying frame 5.
Also, the rootstock seedling transport block 7 is supported so as to be movable left and right. In addition, each of the transport blocks 6 and 7 is provided with a claw 6a that can move up and down.
7a. Each of the nails 6a., 7a. Engages the scion seedling tray t and the rootstock seedling tray t mounted on the scion seedling stock device 2 and the rootstock seedling stock device 3, and Supply to line G and root line H. The scion seedling tray t and the rootstock seedling tray t store the shrub seedlings m and the rootstock seedlings n constituting the cell-formed seedlings in a row in units of 6 to 8 units. In addition, as the scion seedling m and the rootstock seedling n, tomato seedlings are used in the examples.

On the other hand, the scion line G and the root line H are
The conveyor belts 10 and 11 are wound around the transport frames 8 and 9 in the longitudinal direction, and the conveyor belts 10 and 11 are intermittently driven by a motor (not shown). Therefore, the scion seedling tray t and the rootstock seedling tray t placed on each of the conveyor belts 10 and 11 are conveyed toward the front side of the drawing as indicated by the arrow. In addition, each conveyor belt 10 and 11 is configured to be vertically movable in the grafting processing unit 12 on the downstream side (a specific vertical movement mechanism will be described later), and the scion seedling n and the rootstock seedling m are accompanied by it. Move up and down. Further, the graft processing unit 12 described above includes a cutting device A and a scoop pinching device B provided between the scion line G and the stock line H, and a root clip device C and a clip supply device provided on the side of the scoop line H. The device D constitutes the main part. An auxiliary cutting device E, which will be described later, is provided on the root line H upstream of the graft processing unit 12. In addition, on the downstream side of the rootstock line H, the seedlings grafted in the grafting processing unit 12 are grafted into the grafted seedling stock device 13 for each tray t.
A seedling carrying-out device 14 for collecting the seedlings is provided. The seedling carry-out device 14 is configured almost the same as the seedling carry-in device 4, and the grafted seedlings conveyed to the end of the root line H are lifted by the vertically movable claws 14a for each tray t, and the grafted seedling stocking device is provided. Transfer to 13. At the end of the spike line G, the spikelets m from which the spikes have been cut off are placed in the tray t.
Each time, the tray t dropped off from the scion line G and the dropped tray t and the medium in the tray t are separately collected.

The overall structure of the grafting device 1 has been described above. Next, the detailed structure of the grafting unit 12 and the process of grafting will be described. FIG. 2 is an operation diagram showing the first process of grafting, in which the grafting processing section 12 carries the scion seedling m and the rootstock seedling n which are placed and conveyed on the conveyors 10 and 11. A stalk detection sensor that stops at a predetermined cutting (joining) position is provided. This stem detecting sensor uses, for example, a photoelectric sensor including light emitting units 15 and 15 and light receiving units 16 and 16, and the stem of the scion m or rootstock n blocks light from the light emitting units 15 and 15. And the light receiving parts 16 and 1
6 detects this and issues a stop command to the motors that drive the conveyor belts 10 and 11. As a result, when the conveyor belts 10 and 11 stop, the conveyor belts 10 and 11
Support pieces 8a, 9a of the transport frames 8, 9 supporting 11
Are lifted by the cam mechanisms 17 and 17, and the conveyor belts 10 and 11 once rise to the maximum. At about the same time, the cotyledon position detection sensors 18, 18 retracted to the seedling transport passage move below the cotyledon s of the scion seedling m or the rootstock seedling n, and then the cam mechanisms 17, 17 Lowers the conveyor belts 10 and 11 in reverse.

Then, the cotyledon s of the scion m or the rootstock n
When the sensor 18 touches the sensor 18 and closes the contact, the sensor 18, 18 issues a stop command to a motor (not shown) that drives the cam mechanism 17, 17, and the conveyor belt 1
0 and 11 stop descending at that position. Further, when the lowering of the conveyor belts 10 and 11 is stopped, the vertical axis 19 that integrally supports the cutting device A and the spike-clamping device B is rotated toward the spike-line G side in the figure and stopped. Then, the clamper 20 of the scion gripping device B moves forward while sliding toward the upper part of the cotyledon s of the scion seedling m below, and the left and right clamp pieces 20a, 20a are closed at the maximum slid position, and the scion Hold the ear side of seedling m. Further, substantially at the same time when the clamper 20 clamps the ear side of the scion m, the cutter 21 of the cutting device A
Slides forward from the holder part of the base part,
About 30 mm diagonally above the cotyledon s of the mushroom seedling m
Cut at an angle of degrees to cut out the spikes. When cutting the scion, the lower part of the cotyledon s of the scion m is preliminarily held by a chuck (not shown) so that the stem position of the scion m does not shift. With the above, the cutting and pinching of the scion, which is the first step of the graft, is completed, and then the second step shown in FIG. 3 is performed. In addition, when moving to the second step,
The detection of the rootstock seedling n on the rootstock line H side and the detection of the cotyledon s position of the rootstock seedling n are performed simultaneously with the rootstock line G side in the first step, and have already ended. .

In the second stroke, first, the revolving structure 22 (see FIG. 1) provided on the side of the stock line H rotates about the axis P provided at the center thereof in the counterclockwise direction by a predetermined amount, Chuck 23 of rootstock seedling holding device C integrally attached to revolving unit 22
However, the upper part of the cotyledon s of the rootstock seedling n is sandwiched by the sandwiching pieces 23a, 23b.
(Note that the root side of the rootstock seedling n held by the chuck 23 is cut in advance by the auxiliary cutting device E described later). Then, in this state, the vertical axis 19 is rotated from a side of the scion line G to a position facing the root line H by a drive device (not shown). In this case, the clamper 2
No. 0 slides and retracts to the position of maximum rearward lifting while holding the spike. Then, when the vertical axis 19 stops rotating and faces the root line H, the cutter 21 slides downward from the holder portion of the base to move forward, and the root seedling n
The upper part of the cotyledon s of about 5 mm is cut at an angle of 30 degrees diagonally. Further, when the rootstock is cut out by the cutter 21, the root side of the rootstock seedling n is held by the chuck 23 and is carried away from the rootstock line H as the revolving unit 22 rotates clockwise. Then, at the position where the chuck 23 moves away from the rootstock line H, the gripping pieces 23a and 23b are opened to the left and right to release the gripping, and the ear side of the rootstock seedling n falls outside the apparatus. Even when cutting the rootstock, the stems of the rootstock seedlings n under the cotyledons s are held in advance by a chuck (not shown) so that the position (cut) of the rootstock seedlings n is not displaced. Keep it. With the above, the cutout of the rootstock, which is the second step of the grafting process, is completed, and then the process proceeds to the third step shown in FIG.

In the third step, first, the clip supply device D integrally attached to the revolving structure 22 faces the stock line H by the rotation of the revolving structure 22 described above, and the opening / closing claws 24, 24 of the clip supplying device D (see FIG. 5) supplies a clip 25 to the cut end of the rootstock. The clip supply device D is located at the bottom of a large number of clips 25 loaded in advance in the magazine 26 in the previous stroke in which the rootstock seedling holding device C is rotated to a position facing the rootstock line H. The clip 25 is taken in. Further, the clip 25 has its legs 25a, 25
a is pressed by the opening and closing claws 24, 24, the slit portion at the tip is widened, and the cut of the rootstock is inserted from the slit. The open / close claws 24, 24 can be opened / closed by a return spring and a solenoid (not shown). Then, almost at the same time when the clip 25 is supplied to the cut end of the rootstock, the clamper 2 that has slid to the maximum raised position and has been retracted.
0 descends toward the clip 25 while holding the spike, and inserts the cut end of the spike into the clip 25. Also,
When the cut end of the scion is inserted into the clip 25, the opening / closing claw 2
Since 4, 24 open and release the foot portions 25a, 25a of the clip 25, the clip 25 is closed by its elastic restoring force and holds the scion and the rootstock.

Further, the clamper 20 pushes the scion into the clip 25 with a further small pressing force in a state where the clip 25 is closed, and then releases the scissors. Therefore, the cuts of the rootstock and the scion are securely joined, and the joined state is held by the clip 25. With the above, the joining and holding of the scion and the rootstock, which is the third step of the grafting process, is completed. After that, the grafting device 1 returns to the first step, and thereafter, the same steps are repeated in succession to continuously grow seedlings. Perform grafting. A tomato seedling grafted by the grafting device 1 is shown in FIG.
In the embodiment, the joining state of the spike and the rootstock is held by the flexible clip 25 such as vinyl, but the holding means is, for example, a cut end of the spike and the rootstock. It is also possible to cover the surroundings with clay etc. in the joined state to maintain the joined state, or use a heat-shrinkable tube and blow hot air to the tube with the scion and rootstock fitted to the tube. It may be attached to shrink it, or it may be attached by spraying it on the cut edges of the scion and the rootstock using an instant adhesive.

Next, the auxiliary cutting device E, which is a main part of the present invention,
The structure will be described with reference to FIGS. 7 to 9. The auxiliary cutting device E is provided on the upstream side of the graft processing unit 12 of the root line H, and is provided with paired cutting blades 26, 26 on the left and right sides of the seedling conveying path of the root line H. The holders 27, 27 to which the respective cutting blades 26 are attached are attached to shafts 29, 29 that are rotatably supported by the main frames 28, 28. Further, the left and right main frames 28, 28 have pins 9a, 9a, ... Extending from the transport frame 9 supporting the conveyor belt 11 of the stock line H.
The height can be adjusted freely. That is, the pins 9a, 9a
・ For the main frames 28, 28,
Move to an appropriate position within the range of (28a), and fix the main frames 28, 28 and the pins 9a, 9a ... With a nut. In addition, the left and right main frames 28, 28 are connected by an intermediate plate 30 at an upper portion bypassing the seedling transport passage, and are formed in a gate shape as a whole.

On the other hand, 31 is a motor for driving the cutting blades 26, ... The motor 31 is attached to the lower part of one main frame 28. Further, a drive gear 32 is fixed to the output shaft of the motor 31, and the drive gear 32 meshes with a driven gear 34 on an intermediate shaft 33 which is rotatably supported on the lower portion of the main frame 28, so that the intermediate shaft 33 has a motor 31. Decelerate rotation and transmit. Further, one end of a joint 35 is attached to the inner end of the intermediate shaft 33, and the other end of the joint 35 is attached to the intermediate shaft 36 on the other side. Further, the drive-side pulleys 37, 37 are provided on the outer ends of the left and right intermediate shafts 33, 36, respectively.
37 is fixed, and the drive side pulleys 37, 37 wind belts 39, 39 between the driven side pulleys 38, 38 fixed to the shafts 29, 29 on which the cutting blades 26 ... Are mounted. Therefore, the left and right cutting blades 26 ... Include the reduction gears 32, 34, the intermediate shafts 33, 36, the drive side pulley 37,
37, and the motor 3 via the driven pulleys 38, 38.
It is driven to rotate from 1. In addition, 40 (40), 41 (4
1) and 42 (42) are intermediate pulleys that give tension to the belts 39, 39, 43 and 43 are guide plates provided below the cutting blades 26, and 44 and 44 are covers that cover the pulley portions.

Next, the operation of the auxiliary cutting device E described above will be described. The conveyor belt 1 of the stock line H
1 Seedling seedling n placed by the seedling loading device 4 at the start end
Comes to the auxiliary cutting device E sequentially with the intermittent movement of the belt 11. Then, when the true leaves h that are particularly developed on the right and left sides of the rootstock seedling n touch the cutting blades 26 of the auxiliary cutting device E, the cutting blades 26 ... Are splashed upward by the motor 31. Since it is driven to rotate, the true leaf h is cut within the cutting locus k. At this time, although the cotyledon s is developed below the true leaf h, the left and right cutting blades 26,
.. Since the shafts 29 are attached to the shafts 29 which are inclined slightly inward, the cutting locus k becomes an inverted V shape and the cotyledon s is not cut. When the true leaves h are growing and are at a high position, the main frames 28, 28 are adjusted up and down so that the true leaves h are surely cut.
Further, the true leaves h cut by the rotation of the cutting blades 26 ... Are guided by the guide plates 43, 43 provided below the cotyledons s and fall outside the conveyor belt 11. Therefore, the cut true leaves h fall on the conveyor belt 11 and are wound around the conveyor belt 11, or fall on the rootstock seedling n, and the seedling posture of the rootstock seedling n is disturbed in the grafting processing unit 12 thereafter. It is possible to prevent the occurrence of entanglement or entanglement with the device portion of the processing unit 12.

Then, the rootstock seedling n, from which most of the true leaves h which are developed to the left and right are cut off by the auxiliary cutting device E, is conveyed toward the graft processing section 12 thereafter. Therefore, there is no risk that the rootstock seedling n reaches the graft processing unit 12, and the true leaves h that are developed to the left and right of the rootstock seedling n touch the cut edges of the rootstock held by the clamper 20, and the rootstock and the rootstock are joined. It is possible to prevent mistakes or pinching mistakes of the rootstock. Further, the true leaves h do not get entangled with these device parts in the graft processing section 12, and the situation such as frequent stopping of the device does not occur. If a blade used for shaving hair is used as the cutting blade 26 as shown in the embodiment, the true leaf h can be cut well with relatively sharpness, and if both blades having blades on both sides are attached to the holder 27, The cutting blade 26 can be easily attached to the holder 27 by inserting the bolts b, b into the gap provided in the middle portion of both blades and tightening them together with the holder 27.

Further, the auxiliary cutting device E has a graft processing section 12
Provide relatively close to. Therefore, the true leaf h position of the rootstock seedling n fluctuates up and down in the auxiliary cutting portion under the influence of the vertical movement of the conveyor belt 11 for adjusting the height of the cotyledon s. Further, the true leaf h position of the rootstock seedling n differs for each seedling, and it is not possible to adopt a cutting method such as, for example, 10 mm above the cotyledon s position is horizontally removed by a single cutting blade. Therefore, the auxiliary cutting device E is provided with two sets of the cutting blades 26 that are opposed to each other from the left and right with the seedling transport passage interposed therebetween, and surely cuts the unnecessary real leaf h without being affected by these. . However, if the auxiliary cutting device E is provided further upstream of the conveyor belt 11, the true leaf h position of the rootstock seedling n does not fluctuate up and down, and the rootstock seedling n is placed on the conveyor belt 11. It is also possible to cut the true leaf h before carrying it in. Then, in that case, a means for detecting the cotyledon s position, a vertical movement device for the cutting blade 26, and the like are additionally provided to remove unnecessary real leaves h from, for example, the cotyledon s position.
It is also possible to perform uprooting at a time so that the upper part of the millimeter is wiped off horizontally with a single cutting blade. Further, as the auxiliary cutting device E, in addition to a device for cutting with a blade (cutting blade), a device for cutting with a laser, or a device for nipping and tearing the true leaf h portion is also conceivable. However, the cutting device is not limited to the cutting device of the embodiment.

[0021]

As described above, according to the present invention, before cutting off the ear side of the rootstock seedling n by the cutting device A, the main cutting h of the rootstock seedling n is cut off by the auxiliary cutting device E in advance. Since the remaining light rootstock seedlings n are supplied to the cutting device A, during the grafting of the scion and the rootstock, the widely spread true leaves h of the rootstock seedling n become entangled with these device parts. Obstacles such as interruption of processing can be avoided, and smooth grafting can be performed continuously. Further, in the grafting device 1 of the embodiment in which the scion seedling m and the rootstock seedling n are cut by the single cutting device A to perform reliable cutting and joining, the rootstock seedling n Before and after the cutting, the true leaves h of the rootstock seedling n do not interfere with the cut end of the scion provided on the cutting device A, and more reliable cutout of the rootstock and joining to the scion rootstock can be expected. Furthermore, the auxiliary cutting device E
If it is provided on the upstream side of the conveyor belt 11 that supplies the rootstock seedlings n in a row toward the cutting device A, the true leaves h of the rootstock seedling n can be reliably cut continuously one by one. In addition, by providing the cutting blades 26 ... Which rotate to the left and right on both sides of the seedling conveying path of the conveyor belt 11, it is possible to easily cut the unnecessary real leaves h of the rootstock seedling n without remaining. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire grafting device.

FIG. 2 is an operation diagram showing a first stroke of a graft.

FIG. 3 is an action diagram showing a second stroke of the graft.

FIG. 4 is an operation diagram showing a third stroke of the graft.

FIG. 5 is a perspective view showing an opening / closing claw of a clip.

FIG. 6 is a front view showing a grafted seedling.

FIG. 7 is a perspective view of an auxiliary cutting device.

FIG. 8 is a side view showing a partial cross section of the auxiliary cutting device.

FIG. 9 is a cross-sectional view showing an auxiliary cutting device.

[Explanation of symbols]

 1 Grafting Device 10 Scion Conveyor Belt 11 Rootstock Conveyor Belt 20 Clamper 21 Cutter 25 Clip (Holder) 26 Cutting Blade A Cutting Device B Scion Clamping Device C Rootstock Clamping Device D Clip Supply Device E Auxiliary Cutting Device m Scrub Seedling n Rootstock

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tateo Tanimoto 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Research Laboratory (72) Inventor Masanori Masmoto Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture 4-6-22 Mitsubishi Heavy Industries, Ltd. Hiroshima Research Institute (72) Inventor Mitsuru Mange, Shimane Prefecture Higashi-Izumo-cho, Ojiya-cho 667-1 Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor Osamu Aka, Yatsuka-gun East, Shimane Prefecture Izumo Town, Ojiyacho, 667 1 Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor, Koichi Yamamoto, Yatsuka-gun, Shimane Prefecture, Higashi Izumo Town, Ojiyacho, 667 1 Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor, Yoshiaki Sato, Yatsuka-gun, Shimane Prefecture Izumo-cho, Ojiya-cho, 667 1 Mitsubishi agricultural machinery Co., Ltd.

Claims (2)

[Claims] 1. The root side of the scion seedling and the scion side of the rootstock seedling are cut off by a cutting device, and one of the cut out shrubs is joined to the other rootstock by a clamper, and the joined state is held by a holder, or In a grafting device for seedlings held by an adhesive material, an auxiliary cutting device is provided for cutting out the true leaf portion of the rootstock seedling in advance before cutting off the ear side of the rootstock seedling by the cutting device, and the rootstock is cut by the auxiliary cutting device. After removing the unnecessary true leaf portion on the ear side of the seedling, the ear side of the rootstock seedling is cut off by the cutting device, and the cut end of the rootstock is joined to the cut end of the rootstock. Grafting device. 2. A rotary cutting blade, wherein the auxiliary cutting device is provided on an upstream side of a conveyor belt for supplying rootstock seedlings in a line toward the cutting device, and is provided on both left and right sides of the conveyor belt with a seedling conveying passage interposed therebetween. The grafting device for seedlings according to claim 1, wherein unnecessary root leaves of the rootstock seedlings conveyed by are cut off continuously.