JPH0813208B2 - Seedling transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used, for example, for planting strawberries, rye and the like, and is divided from a mother plant on the seedling surface of a seedling stand. The present invention relates to a seedling transplanter having a plurality of crop seedlings mounted thereon, sending the crop seedlings toward a seedling take-out port, and taking out, holding and planting the sent crop seedlings.

[Conventional technology]

In this kind of seedling transplanter, conventionally, the seedling placed on the seedling surface is transported by a vertical feed mechanism that acts on the root,
The seedlings fed to the seedling take-out port were taken out and held by a planting nail type seedling (for example, Japanese Patent Application No. 1-23387).

[Problems to be Solved by the Invention]

In the case of the conventional configuration described above, a partition wall is certainly placed between adjacent placed seedlings to prevent the seedlings from falling down in the left-right direction, but since there is no upward pressing, the seedlings are not pressed down. In some cases, the seedlings floated above the seedling surface and fell sideways while being positioned at the outlet.

Then, when holding the top seedling with the planting nail, it is necessary to hold the stem slightly above the root, because the seedling is not in the desired posture, but below the stem It sometimes acted on the roots to damage the shoots (if the crop seedlings were strawberries), and if the posture of the seedlings was too disturbed, they could not be held by the planting nails.

The object of the present invention is to additionally configure a mechanism capable of positioning the leading seedling at the seedling take-out opening in a desired posture,
The point is to provide a device that can reliably operate the additional mechanism.

[Means for solving the problem]

The feature according to the invention operates prior to the planting mechanism,
While holding the leading crop seedling that has been fed to the vicinity of the seedling take-out port, the holding seedling is forcibly moved to the seedling take-out port, and the moved seedling is held until the planting mechanism holds. A seedling holder for maintaining the state is provided, and this seedling holder is composed of a tip seedling holding portion for holding seedlings and a frame for supporting the seedling holding portion in a relatively swingable manner, and the seedling holder is The tip seedling holding portion is provided with a drive mechanism for switching between an action posture and a non-acting posture for holding the seedling, and the tip seedling holding portion is provided in the drive mechanism so that the tip seedling holding portion forcibly moves the held seedling to the seedling take-out port. Is provided with a cam mechanism for swinging relative to the movable frame, and the function and effect thereof are as follows.

[Work]

That is, as shown in FIG. 2 and FIG. 3, before the planting mechanism (6) grips the leading seedling (a), the seedling holder (13) operates in advance, and specifically, The fork-shaped tip seedling holding portion (23) of the seedling holding tool (13) holds the stem portion of the crop seedling (a) in a state of being held, and at the same time, the driving mechanism (15) of the seedling holding tool (13). ), The fork-shaped holding portion (23) swings downward so as to make a "bow", and the leading crop seedling (a) is provided.
Is pulled out to the seedling take-out opening (b) and maintained in a predetermined posture.

At this time, the top crop seedling (a) is separated even if it is entangled with the succeeding crop seedling (a), and even if it is lifted from the seedling surface (C), this pushing-down action is performed. Is switched to a predetermined posture. The leading crop seedling (a) switched to a predetermined posture by the seedling holder (13) is kept in posture by the seedling holder (13) until it is held by the planting mechanism (6). Therefore, even if the planting mechanism (6) takes out the top crop seedling (a) with some impact, the impact force does not cause the surface of the seedling to rise above the seedling surface (C) or disturb the posture. The top seedling (a) can be taken out well by the attachment mechanism (6).

〔The invention's effect〕

As a result, the posture of the crop seedling before being taken out by the planting mechanism can be maintained in a desired posture, and the subsequent work of taking out and planting the seedling can be smoothly performed.

However, Japanese Patent Application No. 1-
Although there is a proposal in No. 146198, the gist of this is that a four-link is adopted as a drive mechanism, and a fork-shaped seedling holding part is pivotally supported at the tip of the four-link so that it can be relatively swung. Another link mechanism for swinging the fork-shaped seedling holding portion downward while the fork-shaped seedling holding portion holds the crop seedling is linked to the fork-shaped seedling holding portion. That is, as shown in FIG. 9 and FIG. 10, the first swing link (40) and the second swing link (41) pivotally supported by the planting case (4) are respectively provided at the upper end with the third swing link. While linking the links (43) so that they can swing relative to each other to form a four-link,
A fork-shaped seedling holding portion (23) is pivotally supported at the tip of the third link (43) so as to be relatively swingable. Then, the fourth swing link (44) is pivotally supported on the planted case (4), and the fourth swing link (44) and the fork-shaped seedling holding portion (23) are placed at the fifth position.
The fifth link (45) is passed through a bracket (46) protruding from the side of the first swing link (40) while being connected by a link (45), and the bracket (46) and the fifth link are connected. The fifth link (45) and the fourth swing link (44) are moved rearwardly between the fork-shaped seedling holding part (2) and the (45).
The first spring (47) that swings 3) downward is stretched.
Further, between the fourth swing link (44) and the first swing link (40), a second tension spring (48) against the force of the first spring (47) and a first swing link (40) are provided. Between the planting case (4),
A third tension spring (49) for urging the entire four-link structure in the backward retracted state is stretched.

Therefore, from the standby state of FIG. 10, the first swing link (40)
When is driven by the drive mechanism (50), as shown in FIG. 9, the quadruple link swings and the fork-shaped seedling holding portion (23) advances to grab the leading seedling (a). In this gripping state, the angle (α) between the first swing link (40) and the third link (43) changes from an acute angle to an obtuse angle, so that the urging force of the first spring (47) increases. As the biasing force of the second spring (48) decreases, the fork-shaped seedling holding portion (23) swings downward with the rearward movement of the fifth link (45) to move the leading seedling (a). Push down.

In order to adopt the complicated structure as described above, the fork-shaped seedling holding portion (23) must be formed unless the biasing spring force is properly balanced.
There is a difficulty in adjusting that does not swing downward while holding the seedling (a), but in the case of the present invention, since the cam mechanism is used, the top crop seedling (a) is gripped. In this state, the fork-shaped seedling holding portion can be reliably swung downward, and the swivel timing can be easily set.

〔Example〕

A description will be given of a seedling planting device (A) for strawberries, which is attached to the rear end of the traveling machine retreat (figure body) through the elevating link mechanism (1). As shown in FIG. 1, this seedling planting device (A) is
A seedling stand (2) that reciprocates laterally with a constant stroke, a feed case (3) that receives power transmission from the traveling machine body (figure body) side, and a plurality of feed cases (3) extending rearward from the feed case (3). Planting case (4) and planting arm (5) pivotally supported on both lateral sides of this planting case (4).
A planting claw type planting mechanism (6) attached to the tip of the planting arm (5), and a leveling float (7) arranged below the planting case (4).

Next, the structure of the seedling stand (2) will be described. Fifth
As shown in Figures (a) and (b), the seedling placement surface (C) of this seedling placement base (2) is divided into multiple parts by the number of planting rows,
For each of these divisions, rows of strawberries as crop seedlings are stored in rows.

For this group of strawberries, a plurality of first partition walls (8) made of a resin plate for partitioning adjacent groups of seedlings vertically are arranged in parallel.
The plurality of first partition walls (8) are supported by a round bar-shaped frame (9A) that laterally penetrates the upper end and the lower end of the first partition wall (8) at the end on the hand side in the feeding direction of the strawberries. The lower side end is supported by a round bar-shaped frame (9A) that laterally penetrates only the upper ends thereof, and the insertion portion of the round bar-shaped frame (9A) is laterally bulged to adjoin the first partition wall (8 ) And the interval setting section (8a). These round bar frames (9A)
Is cantilevered and fixed to the partition wall (8A) at one end so that the other first partition wall (8) can be inserted and assembled from its free end. Then, by assembling and fixing the first partition wall (8) at the other side end to the free end of the round bar-shaped frame (9A), the plurality of first partition walls (8) for one line of planting are used as a unit. It can be configured and these units can be attached to and detached from the seedling stand (2). These first partition walls (8) are installed at a certain height above the seedling surface so that they act on the upper part of the stem portion of the bunting grass.
A seedling squeeze plate (21) is arranged at a position opposite to the lower end of the partition wall (8) while being supported by the first partition walls (8A) and (8B) at both ends. Strawberry seedlings (a) separated from the mother stock are stored in a vertical row between the adjacent partition walls (8) and (8), and the roots of the respective storage crop seedlings (a) are placed in the seedling squeeze board (21). ) Supported by the operator and the seedling squeeze board (21) and the first
When the partition walls (8) and (8) are integrally mounted on the seedling placing stand (2) and the seedling squeeze plate (21) is pulled out above the seedling placing stand (2), it can be planted.

Below this seedling scooping plate (21), there is provided a belt type vertical feed mechanism (10) for feeding the strawberries (a) toward the seedling take-out port (b). (10) is constructed such that a belt (10a) is stretched over a freewheel (not shown) at the upper end of the seedling stand (2) and a drive wheel (12) at the lower end.

Next, the seedling holder (13) will be described. As shown in Fig. 1, the lateral drive shaft (1
4) is installed, and a crank arm (not shown) for driving the planting mechanism (6) is attached to a portion of the lateral drive shaft (14) projecting from the planting case (4). ), The first drive cam (1
5) is attached to the lateral drive shaft (14). on the other hand,
The lateral rotation shaft (16) is supported by the planting case (4) above the lateral drive shaft (14), and the first drive is provided inside the planting case (4) of the lateral rotation shaft (16). A first swing arm (18) is attached to the cam follower (17) driven by the cam (15) and the outer portion of the planting case (4). On the other hand, behind the first swing arm (18), the second swing arm (20) is pivotally supported on a support frame (19) extending rearward from the rear end of the planting case (4). A horizontal arm (21) is pivotally supported on the upper ends of the first swing arm (18) and the second swing arm (20) so as to be capable of relative swing. The first swing arm (18), the second swing arm (20), and the horizontal arm (21) form a four-link type movable frame (22).
The fork-shaped seedling holding portion (23) is pivotally supported at the front end of the horizontal arm (21) so as to be vertically swingable. The seedling holding portion (23) is pivotally supported by a connection case (21A) of the horizontal arm (21) and the first swing arm (18) via a horizontal rotation shaft (24), and the connection case. In the (21A), the cam follower (24a) attached to the lateral rotation shaft (24) and the second drive cam (26) attached to the lateral shaft (25) so as to rotate integrally with the first swing arm (18). ), The rocking timing is set. As shown in FIG. 4, in this seedling holding portion (23), two piano wires having a diameter of about 2 mm are extended at an interval (l) of approximately 12 to 13 mm on the left and right, and the two seed wires serve as a crop seedling. It has a function of holding and holding the stem portion of (a). On the other hand, the planting claw (6) has bars having a diameter larger than that of the piano wire arranged on the left and right, and the outer-to-outer distance (L) of the bars is set to 15 to 16 mm.

In such a configuration, the first swing arm (18)
The movable frame (22) urged to the standby position by the return spring (27) installed on the first drive cam (15)
When the cam follower (17) is swung upward by the above, the first swing arm (18) swings forward and the movable frame (2
2) The whole moves forward toward the seedling stand (2). In this case, the second drive cam (26) rotates in conjunction with the swing of the first swing arm (18), but the cam follower (24a) moves to the second
Since it is placed on the highest cam surface of the drive cam (26), the posture of the seedling holding part (23) does not change. Then, as shown in FIG. 2, while further advancing in that state to hold the leading crop seedling (a) prior to the planting claw (6), as shown in FIG. 3, the cam follower ( 24a) is the second drive cam (2
In order to reach the stepped portion of 6), the seedling holding portion (23) swings downward by a certain angle. At this time, the top crop seedling (a) is moved downward and set in a predetermined position at a predetermined position of the seedling take-out port (b).

[Another Example] Another form of the seedling holder (13) will be described. 8th
As shown in Figures (a) and (b), the third drive cam (28) as a drive mechanism is pivotally supported in the planted case (4), and the drive force of the third drive cam (28) is applied. The bell crank (29) to be received is pivotally supported, and the lateral rotation shaft (30) that rotates by receiving the driving force of the bell crank (29) is supported, and the lateral rotation shaft (30) is provided with a planting case (4). An engaging arm (31) that engages with the bell crank (29) is provided in the inner portion, and a fixed shaft (32) is inserted into the shaft of the lateral rotation shaft (30) so that the rotation shaft (32) is planted. A fourth drive cam (33) is provided on the outside of the case (4). A rocking case (34) that covers the fourth drive cam (33) and projects upward is integrally fixed to the shaft end of the lateral rotation shaft (30), and the rocking case (34) is attached to the tip of the rocking case (34). Seedling holding part (23)
Is supported so that it can move up and down relatively. The rocking case (3
4) An arm (35) that swings integrally with the seedling holding portion (23) is provided in the upper end, and the arm (35) and the fourth drive cam (33) are brought into contact with the seedling holding portion ( A vertically oriented rod (36) for oscillatingly driving 23) is housed in the oscillating case (34).

Reference numeral (37) in the figure denotes a link portion that achieves a quadruple link together with the swing case (34).

With the above configuration, when the third drive cam (28) rotates and the bell crank (29) rocks, the rocking case (34) rocks forward and the seedling holding portion (23) moves. Move forward to the top crop seedling (a). Then, during the forward movement, the vertical rod (36) moves on the low cam surface of the fourth drive cam (33) in a fixed state, so that the posture of the seedling holding portion (23) does not change, Further advance to the seedling holding part (2
When 3) holds the seedlings, the vertically oriented rod (36) rides on the cam step surface of the fourth drive cam (33) and the seedling holding portion (23) faces downward, as shown in Fig. 8 (b). Rock to. Then, the leading crop seedling (a) is delivered to the seedling take-out opening (b) in a predetermined posture, and the posture is maintained by the seedling holder (13) until it is taken out by the planting claw (6).

The planting mechanism (6) may be held in an openable and closable manner.

The movable frame (22) is shown in FIG.
As shown in (b), the first swing arm (18) or the swing case (34) alone may not have the link portion (37).

As the drive mechanism (15), a cylinder or the like for exclusively moving the movable frame (22) may be provided, and its form is not specified.

Assuming that the cam surfaces of the cam mechanisms (26) and (33) are gradually lowered as the movable frame (22) advances, the seedling holding section is also moved by the swing operation of the first swing arm (18). (23) moves linearly, and the occupied space can be reduced accordingly.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a seedling transplanting machine according to the present invention, FIG. 1 is an overall side view, FIGS. 2 and 3 are longitudinal side views showing an operating state of a seedling holder, and FIG. 4 is FIG. IV-IV line sectional view of FIG. 5, FIG. 5 is a perspective view of inserting and placing strawberries in the partition wall, and FIGS. 6 (a) and 6 (b) are vertical side views showing another embodiment of the seedling holder. Fig. 7 is a plan view of the seedling holder, Fig. 8 (a), (b)
Is a vertical sectional side view showing another embodiment of the seedling holder, FIG. 9 and FIG.
FIG. 10 is a side view showing a conventional example of a seedling holder. (2) …… Seedling stand, (6) …… Planting mechanism, (13) ……
Seedling holder, (15) …… Drive mechanism, (22) …… Movable frame, (23) …… Seedling holding part, (a) …… Crop seedling, (b)…
… Sapling outlet, (C) …… Surface of seedling.

Claims (1)

[Claims] 1. A plurality of crop seedlings (a) separated from a mother plant are placed on the seedling surface (C) of a seedling stand (2), and the crop seedlings (top) are taken out from the seedling take-out port. A seedling transplanter provided with a planting mechanism (6) for sending out toward the plant (b), taking out the plant seed (a) sent out, holding and planting the plant (a), which precedes the planting mechanism (6). Then, the head crop seedling (a) that has been fed to the vicinity of the seedling take-out port (b) is held, and the held seedling (a) is forcibly moved to the seedling take-out port (b), A seedling holder (13) is provided for maintaining the moved seedling (a) until the planting mechanism (6) holds the seedling holder (13). The tip seedling holding part (23) for holding and a frame (22) for supporting the seedling holding part (23) in a relatively swingable manner are provided. The holding mechanism (13) is provided with a drive mechanism (15) for switching between a working posture and a non-working posture in which the tip seedling holding portion (23) holds the seedlings, and the driving mechanism (15) includes the tip seedling holding portion ( 23) retains the seedling (a) at the seedling take-out port (b)
Cam mechanism (2) for swinging the tip seedling holding portion (23) relative to the movable frame (22) in order to forcibly move the tip seedling holding portion (23).
6) A seedling transplanter equipped with.