JP6421158B2 - Transplantation hand unit - Google Patents

Description

  The present invention relates to a transplantation hand unit provided in a transplantation device for transplanting seedlings.

  Conventionally, for example, a hydroponic seedling transplanting device described in Patent Document 1 is known. In this transplantation device, when transplanting a plant seedling planted in a urethane block (nursery bed piece) into a hole in a transplant destination such as a growth panel, a pair of clamping plates (transplantation hands) are used to transfer a medium seedling (plant seedling stem part). The urethane block is inserted into the hole by sandwiching and lowering from above the hole. Further, in that case, the seedlings extending so as to spread outward from the lower surface of the urethane block by ejecting water downward from the outlet of the water guide pipe fixed vertically inside the holding plate. The tips of the roots of the seedlings are sharpened like the tip of a brush, which makes it possible to prevent the roots of the seedlings from being caught on the periphery of the hole of the transplantation destination.

JP 2004-242652 A

  By the way, at the stage of transplanting, the roots of seedlings often extend so as to spread radially outward from the lower surface of the urethane block. Therefore, in the configuration in which water is jetted downward from the outlets of the water guide pipes provided inside the pair of opposing sandwiching plates, water is applied to the entire roots that spread radially outward from the lower surface of the urethane block. It was difficult to spread, and there was a possibility that the whole root of the seedling could not be aligned and inserted into the hole of the transplant destination as desired.

  The present invention has been made in view of such circumstances, and its purpose is to align the entire roots of the seedlings that extend so as to spread outward from the lower surface of the seedbed pieces during transplantation, and within the holes of the transplant destination. It is to provide a transplantation hand unit that can be inserted.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
The transplantation hand unit that solves the above problems is
A transplanting hand unit provided in a transplanting apparatus for transplanting seedlings, wherein a first hand capable of sandwiching an elastically deformable seedbed piece on which the seedlings are planted, and the entire periphery of the lower surface of the seedbed piece are the central part of the lower surface A second hand capable of holding the seedbed piece at a position lower than a position of the seedbed piece held by the first hand.

  According to this configuration, when the seedbed piece held by the first hand is held by the second hand, the seedbed piece is squeezed by the second hand so that the entire periphery of the lower surface is brought toward the center of the lower surface. It will be in the state. Therefore, out of the seedling roots extending downward from the lower surface of the seedbed piece, the seedling roots extending downward from the vicinity of the periphery of the lower surface are brought toward the center of the lower surface, thereby aligning the entire seedling roots. Can do. Therefore, the whole roots of the seedlings extending so as to spread outward from the lower surface of the seedbed piece at the time of transplantation can be aligned and inserted into the hole at the transplantation destination.

  In the transplantation hand unit, the seedbed piece is configured to absorb and hold water, and further includes a water supply unit capable of supplying water to the seedbed piece in a state of being held by the first hand. Preferably it is.

  According to this configuration, when water is supplied from the water supply unit to the seedbed piece held by the first hand, the water is absorbed and held inside the seedbed piece. Then, when the nursery piece is held by the second hand in that state, the water held inside the nursery piece is squeezed downward from the entire lower surface, and the squeezed water is drawn from the lower surface of the nursery piece. It flows all at once through the roots of the seedlings that extend outward. Therefore, the tip of the root of the seedling extending so as to spread outward from the lower surface of the seedbed piece is aligned with the center of the lower surface by the flow of water, and the whole seedling root is inserted into the hole of the transplant destination can do.

  In the transplanting hand unit, it is preferable that the water supply unit is provided on a surface that contacts a side surface of the seedbed piece when the seedbed piece is sandwiched in the first hand.

  According to this configuration, in a state where the seedbed piece is sandwiched by the first hand that also functions as a water supply unit, water can be supplied from the side surface of the seedbed piece to the inside of the seedbed piece, and hangs down from the lower surface of the seedbed piece. Water can be uniformly transmitted from the root to the tip of the whole seedling root.

In the transplant hand unit, the first hand and the second hand are preferably configured to be movable up and down.
According to this configuration, if the first hand and the second hand are lowered together with the seedbed piece clamped by the first hand being clamped so that the lower surface is squeezed by the second hand, the center of the lower surface of the seedbed piece is obtained. The tips of the roots of the seedlings arranged so as to gather together can be easily inserted into the hole of the transplant destination.

In the transplant hand unit, the first hand and the second hand are preferably configured to be movable up and down separately.
According to this configuration, after the first hand and the second hand holding the seed bed piece are lowered together to insert the tip of the seedling root into the hole of the transplant destination, the holding state by the second hand is released. Then, if the first hand is further lowered, the seedbed piece can be transplanted into the hole of the transplant destination.

The front view which shows typically one Embodiment of the transplant apparatus provided with a transplant hand unit. The perspective view which shows the part of the transplant hand unit in a transplant apparatus. The 1st hand of a transplant hand unit shows the state which pinched the seedbed piece, (a) is the perspective view of the whole, (b) is the front view of the principal part. The 1st hand and 2nd hand of a transplant hand unit show the state which pinched the seedbed piece, (a) is the perspective view of the whole, (b) is the front view of the principal part. FIGS. 5A and 5B show a state where the transplantation hand unit is lowered from the state shown in FIG. 4, wherein FIG. 5A is a perspective view of the whole and FIG. FIG. 6 shows a state in which the second hand of the transplantation hand unit is opened from the state shown in FIG. 5, (a) is a perspective view of the whole, and (b) is a front view of the main part. FIG. 7 shows a state in which the first hand of the transplantation hand unit is further lowered from the state shown in FIG. 6, (a) is a perspective view of the whole, and (b) is a front view of the main part.

Hereinafter, an embodiment of a transplantation apparatus including a transplantation hand unit used when transplanting a plant seedling will be described with reference to the drawings.
As shown in FIG. 1, the transplanting device 11 includes a transplanting mechanism 12 that transplants a plant seedling S and a transport mechanism 13 that transports the seedling S. In addition, the transplant apparatus 11 in this embodiment is an apparatus which transplants the seedling S planted in the seedbed piece N which is a sponge-like block comprised, for example with urethane etc. with the seedbed piece N together.

  The transport mechanism 13 includes a first transport unit 15 that transports a first panel 14 on which a plurality of seedlings S before transplantation are placed, a second transport unit 17 that transports a second panel 16 that is a transplant destination of the seedlings S, and have. The first panel 14 is provided in a tray shape and has a plurality of grooves 18 penetrating in the vertical direction Z on the bottom wall thereof. In the seedling S placed on the first panel 14, the root Ne of the seedling S extends downward from the lower surface of the seedbed piece N via the groove 18. On the other hand, the 2nd panel 16 is provided in plate shape, and has the some hole 19 penetrated to the up-down direction Z from the upper surface to the lower surface. That is, the transplanting mechanism 12 transplants the seedling S from the first panel 14 to the second panel 16 by inserting the seedbed piece N placed on the first panel 14 into the hole 19 of the second panel 16. The hole 19 provided in the second panel 16 is opened in a circular shape.

  The 1st conveyance part 15 and the 2nd conveyance part 17 are comprised by the conveyor etc., for example, and are arrange | positioned so that it may mutually adjoin. Moreover, the 1st conveyance part 15 and the 2nd conveyance part 17 are conveying the 1st panel 14 and the 2nd panel 16 in the mutually passing direction, respectively. The first transport unit 15 and the second transport unit 17 may be configured to transport the first panel 14 and the second panel 16 in the same direction, respectively. Here, in this embodiment, a direction along the direction in which the transport mechanism 13 transports the first panel 14 and the second panel 16 is referred to as a depth direction X.

  The transplanting mechanism 12 includes a transplanting hand unit 20 having a hand for transplanting the seedling S, and a moving mechanism 30 that moves the transplanting hand unit 20. The moving mechanism 30 is installed on the pair of frames 31 so as to straddle the transport mechanism 13 and the pair of frames 31 disposed so as to sandwich the transport mechanism 13 in the width direction Y intersecting the depth direction X and the vertical direction Z. It has the 1st rail part 32 and the 1st slider 33 attached to the 1st rail part 32 so that a movement is possible. The moving mechanism 30 is attached to the first slider 33 on the opposite side to the side where the first rail portion 32 is located, and is attached to the second rail portion 34 so as to be movable. And a second slider 35. The first rail portion 32 extends along the width direction Y, and the first slider 33 is movable along the first rail portion 32 in the width direction Y. The second rail portion 34 extends in the vertical direction Z, and the second slider 35 is movable in the vertical direction Z along the second rail portion 34.

  The transplantation hand unit 20 is attached to the second slider 35. In other words, the transplantation hand unit 20 is movable in the vertical direction Z by the second rail portion 34 and the second slider 35. The transplantation hand unit 20 can be moved in the width direction Y together with the second rail portion 34 and the second slider 35 by the first rail portion 32 and the first slider 33. In summary, the transplantation hand unit 20 can be moved along the width direction Y and the vertical direction Z by the moving mechanism 30 above the transport mechanism 13.

  As shown in FIG. 2, the transplant hand unit 20 has a support plate 21 whose vertical direction Z is the longitudinal direction. The support plate 21 is attached to the second slider 35 on the back side facing the second rail portion 34. Then, on the front surface of the support plate 21 opposite to the back surface in the depth direction X, the first hand 40 capable of sandwiching the seedbed piece N and the seedbed piece N sandwiched by the first hand 40 are connected to the nursery piece. A second hand 50 that can be clamped at a position below the position clamped by the first hand 40 at N is provided. That is, on the front side of the support plate 21, the first hand 40 is provided so as to be positioned above the second hand 50 attached to the lower front portion of the support plate 21.

  An elevating mechanism 22 that allows the first hand 40 and the second hand 50 to move relative to each other in the vertical direction Z is attached to the front surface of the support plate 21. The elevating mechanism 22 includes a guide rail portion 23 that extends along the vertical direction Z, and a moving body 24 that is movably attached to the guide rail portion 23. The lower portion of the back surface of the guide rail portion 23 is attached to the upper portion of the front surface of the support plate 21. The movable body 24 that is movable in the vertical direction Z along the guide rail portion 23 is attached with a metal fitting 60 that is bent and extended in an L shape along the vertical direction Z and the depth direction X. In the metal fitting 60, a portion extending along the vertical direction Z is attached to the moving body 24, and a portion extending forward along the depth direction X supports the first hand 40. That is, in the present embodiment, the first hand 40 moves up and down based on the driving of the elevating mechanism 22 attached to the support plate 21, thereby moving up and down with respect to the second hand 50 fixed to the support plate 21. Move relative to Z.

  As shown in FIG. 2, the first hand 40 has a pair of sandwiching arms 41 for sandwiching the seedbed piece N and a drive unit 42 for driving the sandwiching arms 41. The drive part 42 is comprised, for example with an actuator etc., and the metal fitting 60 is attached to the upper surface with the screw which is not shown in figure. The drive unit 42 is connected to each clamping arm 41 via a plate-like transmission member 43. The transmission member 43 is screwed to the holding arm 41 with a screw (not shown), and is provided so as to be rotatable about a base end side on which the drive unit 42 is located. Then, the drive unit 42 changes the distance between the tips of the sandwiching arms 41 so that the pair of sandwiching arms 41 moves symmetrically in the width direction Y. That is, the first hand 40 is configured so that the holding arm 41 can be opened and closed, and the driving arm 42 is in a state in which the holding arm 41 is closed so as to reduce the distance between the tips of the holding arm 41, thereby Pinch. The first hand 40 in FIGS. 1 and 2 shows a state in which the holding arm 41 is closed.

  The sandwiching arm 41 constituting the first hand 40 has a sandwiching portion 46 that is bent and extends in an L shape along the depth direction X and the vertical direction Z. The clamping portion 46 is provided so as to be bent in an L shape downwardly after extending forward along the depth direction X, and a base end portion (portion side portion) along the depth direction X is transmitted. It is attached to the lower surface of the member 43. And the clamping part 46 can clamp the seedbed piece N because the front-end | tip part (front side part) 46a bent in the L shape toward the lower part contacts the side surface of the seedbed piece N. As shown in FIG.

  In addition, as shown in FIG. 2, a water supply made of an injection port capable of jetting water is provided on a surface that comes into contact with the side surface of the seed bed piece N when the seed bed piece N is held at the distal end portion 46 a of the holding unit 46. A portion 47 is provided. That is, a channel (not shown) having the water supply unit 47 as a downstream end is provided in the clamping unit 46 of the clamping arm 41, and the upstream end of the channel (for example, at the base end of the clamping arm 41). A water supply tube (not shown) is connected to the provided connection port.

  On the other hand, the second hand 50 is a squeezing arm that squeezes the lower part of the seed bed piece N so that the entire periphery of the lower surface of the seed bed piece N held by the first hand 40 is moved toward the center of the lower surface. 51 and a drive unit 52 for driving the aperture arm 51. The drive part 52 is comprised, for example with an actuator etc., and is connected with each aperture arm 51 via the plate-shaped transmission member 53 attached to the lower surface. Here, the drive unit 52 and the transmission member 53 of the second hand 50 have the same configuration and function as the drive unit 42 and the transmission member 43 of the first hand 40. That is, the second hand 50 is configured such that the aperture arm 51 can be opened and closed, and the drive arm 52 is in a state in which the aperture arm 51 is closed so as to reduce the distance between the ends of the aperture arm 51, thereby In contact with the lower side. The second hand 50 in FIGS. 1 and 2 shows a state in which the aperture arm 51 is closed.

  The diaphragm arm 51 constituting the second hand 50 has an arm-shaped diaphragm portion 56 that extends long along the depth direction X. The throttle portion 56 is attached to the lower surface of the transmission member 53 at the base end portion (the back side portion) in the depth direction X. The distal end portion 56a of the throttle portion 56 is provided wide in the width direction Y so that portions thereof overlap each other in the vertical direction Z when the second hand 50 is in a closed state. The tip 56a has a lower portion of the seedbed piece N so that when the second hand 50 holds the lower portion of the seedbed piece N, the entire periphery of the lower surface of the seedbed piece N is brought toward the center of the lower surface. An encircling portion 58 for encircling and squeezing is provided. The surrounding portion 58 is provided so as to be opposed to each other in the width direction Y at the distal end portions 56a of the pair of throttle portions 56, and is provided so as to be cut out in an L shape when viewed in a plan view. And the surrounding part 58 which mutually opposes can make it surround the whole periphery of the lower part of the seedbed piece N because some parts of the front-end | tip part 56a overlap in the up-down direction Z (refer FIG. 4).

Next, the operation of the transplantation hand unit 20 configured as described above will be described.
As shown in FIGS. 3A and 3B, when transplanting the seedling S using the transplanting hand unit 20, first, the seedbed piece N sandwiched by the sandwiching portion 46 of the first hand 40 is used. The second panel 16 is aligned above the hole 19 to be transplanted. In this case, the seedbed piece N is clamped by the tip part 46a of the clamping part 46 of the first hand 40 so that both side surfaces in the width direction Y of the seedbed piece N are sandwiched from above. Then, the seedbed piece N is elastically deformed so that a relatively upper portion in the vertical direction Z held by the distal end portion 46a of the holding portion 46 contracts in the width direction Y.

  On the other hand, at this time, the second hand 50 is open at a position below the first hand 40. That is, as shown in FIG. 3B, the lower part of the seedbed piece N that is sandwiched by the sandwiching portion 46 of the first hand 40 and whose upper part is elastically deformed is not yet squeezed. Accordingly, the root Ne of the seedling S that hangs downward from the lower surface of the seedbed piece N remains extending so that the tip thereof radially spreads outward from the lower surface of the seedbed piece N. Therefore, even if the seedbed piece N is lowered together with the first hand 40 in the state shown in FIG. 3B, the tip where the root Ne of the seedling S spreads in the hole 19 of the transplant destination located below the hole. It is difficult to insert without interfering with the 19 opening edges.

  Then, next, in the state shown in FIG. 3A and FIG. 3B, water is jetted from the water supply portion 47 of the distal end portion 46 a in the clamping portion 46 of the first hand 40. Then, the water permeates into the inside of the seed bed piece N through the side surface of the seed bed piece N. In addition, since the seedbed piece N is a sponge-like block such as urethane, the water sprayed from the water supply unit 47 including a plurality of injection ports is absorbed and held by the seedbed piece N. That is, since the water supply part 47 is open in the surface which contacts the side surface of the seedbed piece N currently clamped by the front-end | tip part 46a in the front-end | tip part 46a of the clamping part 46, it sprays from the water supply part 47 ( The supplied water does not flow down as a single stream along the side surface of the seed bed piece N, but permeates and is absorbed and held from the side surface of the seed bed piece N to the entire interior.

  Next, as shown in FIGS. 4A and 4B, the aperture arm 51 of the second hand 50 is closed based on the drive of the drive unit 52. Then, the second hand 50 sandwiches the lower part of the seedbed piece N in the state where the upper part is sandwiched by the first hand 40 so as to be sandwiched from both sides in the width direction Y. Specifically, the surrounding portion 58 of the distal end portion 56a of the narrowed portion 56 is closed in a state of surrounding the lower portion of the seedbed piece N, and the entire periphery of the lower surface of the seedbed piece N is placed at the center of the lower surface of the seedbed piece N. It is squeezed by elastic deformation so that it can be approached.

  Then, as shown in FIG. 4B, among the root Ne of the seedling S that extends downward from the lower surface of the seedbed piece N, the root Ne of the seedling S that extends downward from the vicinity of the periphery of the lower surface thereof. As the entire periphery of the lower surface of the seedbed piece N is squeezed in a state of being surrounded by the surrounding portion 58, the seedbed pieces N are bundled so as to be brought toward the center portion of the lower surface. At the same time, the water that has permeated the inside of the seedbed piece N and absorbed and held is squeezed downward from the entire lower surface of the seedbed piece N, and the squeezed water is outward from the lower surface of the seedbed piece N. It flows along the whole root Ne of the seedling S extending so as to spread. As a result, the tip of the root Ne of the seedling S extending so as to spread outward from the lower surface of the seedbed piece N is aligned so as to be within the region R projected in the vertical direction Z by the flow of water. It is done.

  Next, as shown in FIGS. 5A and 5B, the second slider 35 is lowered and the first hand 40 and the second hand 50 sandwich the upper and lower portions of the seedbed piece N. Continue to descend. Then, the lowering of the second slider 35 stops at a position where the aperture 56 of the second hand 50 is just above the upper surface of the second panel 16. Then, as shown in FIG. 5 (b), the root Ne of the seedling S extending downward from the lower surface of the seedbed piece N is aligned so as to be gathered at the center of the lower surface, and the hole 19 of the transplant destination is It is inserted into the hole 19 without interfering with the opening edge.

  Next, as shown in FIGS. 6A and 6B, the aperture arm 51 of the second hand 50 opens based on the drive of the drive unit 52. Then, the lower part of the seedbed piece N which has been elastically deformed so as to be sandwiched and contracted by the second hand 50 is elastically restored to the original shape as shown in FIG. 6B. At this time, the upper part of the seedbed piece N remains sandwiched by the first hand 40.

  Next, as shown in FIGS. 7A and 7B, the moving body 24 moves downward along the guide rail portion 23 while the upper part of the seedbed piece N is held by the first hand 40. To do. Specifically, when the tip 46a of the clamping part 46 of the first hand 40 is inserted into the hole 19 of the transplant destination, the moving body 24 moves downward at the position where the seedbed piece N is inserted into the hole 19. Stops. Then, as shown in FIG. 7B, in the hole 19, the seedbed piece N is in a state where the lower peripheral edge thereof is frictionally locked to the inner surface of the hole 19.

  Then, from the state shown in FIGS. 7A and 7B, the first hand 40 is opened in the opening direction so that the holding force for the seedbed piece N in the hole 19 is weakened based on the drive of the drive unit 42. While operating, the moving body 24 is moved upward along the guide rail part 23. Then, only the seedbed piece N remains in the hole 19 at the transplant destination, and the transplanting operation of the seedbed piece N to the hole 19 at the transplant destination is completed. And the transplanting operation | work of the new seedbed piece N with respect to another hole 19 used as the next transplant destination is repeated in the same procedure.

According to said embodiment, the following effects can be acquired.
(1) When the seedbed piece N in a state of being held by the first hand 40 is held by the second hand 50, the second hand 50 is arranged so that the entire periphery of the lower surface of the seedbed piece N is moved toward the center of the lower surface. It will be in the state of being squeezed. Therefore, among the root Ne of the seedling S extending downward from the lower surface of the seedbed piece N, the root Ne of the seedling S extending downward from the vicinity of the periphery of the lower surface is brought toward the center of the lower surface, thereby The whole root Ne can be aligned. Therefore, the whole root Ne of the seedling S extending so as to spread outward from the lower surface of the seedbed piece N at the time of transplantation can be aligned and inserted into the transplantation destination hole 19.

  (2) When water is supplied from the water supply unit 47 to the seedbed piece N sandwiched between the first hands 40, the water is absorbed and held inside the seedbed piece N. Then, when the seedbed piece N is sandwiched between the second hands 50 in this state, the water held inside the seedbed piece N is squeezed downward from the entire area of the lower surface, and the squeezed water is used as the seedbed piece. It flows at a stretch through the entire root Ne of the seedling S extending so as to spread outward from the lower surface of N. Therefore, by the flow of the water, the tips of the root Ne of the seedling S extending so as to spread outward from the lower surface of the seedbed piece N are aligned at the center of the lower surface, and the seedling S is placed in the hole 19 of the transplant destination. The entire root Ne can be inserted.

  (3) In a state where the seedbed piece N is sandwiched by the first hand 40 that also functions as the water supply unit 47, water can be supplied from the side surface of the seedbed piece N to the inside of the seedbed piece N. Water can be uniformly transmitted from the root to the tip of the entire root Ne of the seedling S hanging from the lower surface.

  (4) If the first hand 40 and the second hand 50 are lowered together with the second hand 50 holding the seedbed piece N sandwiched by the first hand 40 so that the lower surface of the seedbed piece N is squeezed, the nursery piece N The tip of the root Ne of the seedling S aligned so as to gather at the center of the lower surface can be easily inserted into the hole 19 of the transplant destination.

  (5) After the first hand 40 and the second hand 50 holding the seed bed piece N are lowered together and the tip of the root Ne of the seedling S is inserted into the hole 19 of the transplant destination, the holding by the second hand 50 If the first hand 40 is further lowered after releasing the state, the seedbed piece N can be transplanted into the hole 19 at the transplant destination.

In addition, you may change the said embodiment as follows. Further, the following modifications may be combined as appropriate.
The transplantation hand unit 20 may be configured such that the first hand 40 is fixed to the support plate 21 and the second hand 50 moves up and down based on the driving of the lifting mechanism 22 attached to the support plate 21.

  The first hand 40 and the second hand 50 may be configured to move up and down together rather than being moved up and down separately. In this case, by adjusting the opening / closing operation timing of the first hand 40 and the second hand 50, the same effects as the above (1) to (4) of the embodiment can be enjoyed.

  If the second panel 16 is configured to move up and down in the vertical direction Z with respect to the transplantation hand unit 20, the first hand 40 and the second hand 50 may be configured not to move up and down. In this case, a delivery mechanism is provided for gripping and carrying the seedbed piece N to be transplanted from the first panel 14 and delivering it to the first hand 40.

  The water supply unit 47 is not limited to the configuration in which the water supply tube 47 is opened at the distal end portion 46 a of the holding portion 46 of the first hand 40, and for example, has a configuration in which the distal end of the water supply tube is routed to the distal end portion 46 a of the clamping portion 46. There may be. In short, any structure may be used as long as water can permeate into the inside of the seedbed piece N held by the first hand 40 and can be absorbed and held.

  -The water supply part 47 does not necessarily need to be. That is, the surrounding part 58 formed in the front-end | tip part 56a of the aperture | diaphragm | squeeze part 56 of the 2nd hand 50 can approach the whole peripheral edge of the lower surface of the seedbed piece N toward the center part of a lower surface with the closing operation | movement. If so, the roots Ne of the seedlings S can be prepared without depending on the water from the water supply unit 47.

-The 1st hand 40 is good also as a structure opened and closed by moving so that the clamping arm 41 may slide along the width direction Y. FIG. The same applies to the second hand 50.
-The clamping part 46 of the 1st hand 40 does not necessarily need to bend below, and the structure only extended along the depth direction X may be sufficient. In this case, it is preferable that the clamping part 46 clamps the upper end of the seedbed piece N.

  DESCRIPTION OF SYMBOLS 11 ... Transplant apparatus, 20 ... Transplant hand unit, 40 ... 1st hand, 47 ... Water supply part, 50 ... 2nd hand, N ... Nursery piece, Ne ... Root, S ... Seedling.

Claims (5)

A transplanting hand unit provided in a transplanting device for transplanting seedlings,
A first hand capable of sandwiching an elastically deformable seedbed planted with the seedling;
A second hand that can clamp the seedbed piece at a position lower than the position of the seedbed piece held by the first hand so that the entire peripheral edge of the lower surface of the seedbed piece is moved toward the center of the lower surface. When,
A transplantation hand unit comprising:   The seedbed piece is configured to absorb and hold water, and further includes a water supply unit capable of supplying water to the seedbed piece held by the first hand. 2. The transplantation hand unit according to 1.   The transplanting hand unit according to claim 2, wherein the water supply unit is provided on a surface that comes into contact with a side surface of the nursery piece when the nursery piece is sandwiched in the first hand.   The transplant hand unit according to any one of claims 1 to 3, wherein the first hand and the second hand are configured to be movable up and down. The transplant hand unit according to any one of claims 1 to 3, wherein the first hand and the second hand are configured to be movable up and down separately.

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