JP2644370B2 - Seedling holder structure of seedling stand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention raises the seedling holding device to a standby position by raising the seedling holding device on the seedling mounting surface only during vertical feeding from the holding posture for the seedling placed on the seedling mounting surface. In order to perform the raising and lowering operation, the support portion of the seedling presser mounted on the seedling rest and the vertical feed mechanism located below the seedling rest are linked with a seedling rest which is linked via a linkage mechanism. It relates to a seedling holding structure.

[Conventional technology]

In the seedling holding structure of this type of seedling rest, conventionally, [1] As shown in Japanese Utility Model Laid-Open No. 2-26419, a vertical rod as a linking mechanism is directed upward with the operation of a vertical feeding mechanism. The support device attached to the vertically-oriented rod is lifted by the upward movement of the linkage mechanism, and the seed presser is raised to the standby position.

[2] As shown in Japanese Utility Model Application Laid-Open No. 2-111219, the upper end side of the seedling presser is pivotally supported so as to be able to swing with respect to the seedling mounting table, and the seedling presser is extended from a pivot shaft of the seedling presser. A link member extending in a direction opposite to the setting direction is provided, and the link member and the vertical feed mechanism are connected by a rod, and with the operation of the vertical feed mechanism, the seedling presser is lowered by pulling down the rod. Standing posture raised.

 The above-mentioned [1] and [2] are known.

[Problems to be solved by the invention]

Therefore, in the case of the conventional structure described in the former [1], the vertical rod interlocking the vertical feed mechanism and the support portion of the seed presser positioned above and below the seedling support is moved upward. Receiving the rising movement force of the support part of the tool and the frictional rising movement force received through the sliding guide part of the seedling nest that guides the vertical rod, the seedling nest moves up and down with respect to the supporting part that supports itself. It moved and generated an impact sound that dropped to its original position each time it moved, leaving room for improvement.

Further, in the case of the conventional structure described in the latter [2], although the above-mentioned problem can be avoided, since the presser is moved up and down by swinging around a fixed fulcrum on the seedling rest, the presser is moved to the seedbed portion. The range of the pressing action parallel to the upper surface is easily varied depending on the thickness of the nursery, and it is difficult to reliably press the nursery surface over a wide range.

An object of the present invention is to make it possible to stop the vertical movement of the seedling cradle by adding a simple reversing mechanism, but to properly act on the seedlings on the seedling laying surface in the holding posture. Another object of the present invention is to provide a seedling holding structure for a seedling holder so that a seedling can be placed.

[Means for solving the problem]

The characteristic configuration of the present invention is such that when the seed presser is raised to the standby position, the linkage mechanism is driven downward and the downward movement of the linkage mechanism is switched to the raising operation of the seed presser. A mechanism is provided, and the seedling presser is connected to the reversing mechanism so as to freely rotate around a continuous point. The operation and effect are as follows.

(Operation)

In other words, when the seedling presser is in the standby position, the linkage mechanism moves downward, thereby moving the seedling presser upward through the reversing mechanism and switching the seedling presser to the standby position. Therefore, a downward moving force acts on the seedling rest, and the seedling rest does not move upward relative to the support member.

In addition, when the seedling presser is moved to the seedling holding posture, the vertical feed is completed in the ascending state, and then the linking mechanism is moved upward so that the seedling presser is actuated, and at the same time, the seedling presser is moved downward by the reversing mechanism. Then switch to the finished posture. At that time, since the seedling holding device is freely rotatably connected to the reversing mechanism around the connecting point, it is easy to automatically take a posture along the seedling surface when holding the seedling on the seedling mounting surface, The range in which the seedlings can be held without moving can be widened.

[Effects of the Invention] With a simple modification that only provides the reversing mechanism, the driving force of the vertical feed mechanism does not act as an ascending movement force on the seedling pedestal, so that the vibration applied to the upward movement of the seedling pedestal The seedling holding structure of the seedling holder that can remove the phenomenon and make full use of the seedling holding action of the seedling holding tool by simply making a simple improvement to the connection structure between the seedling holding tool and the reversing mechanism. Can be provided.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 4 shows a seedling planting apparatus (1) according to the present invention. This seedling planting device (1) is connected to a rear part of a traveling machine body (not shown) via a link mechanism so as to be able to move up and down freely.
A seedling rest (3) which is in a backward and downward inclination posture and reciprocates left and right at a constant stroke, and a planting mechanism (4) for cutting out seedlings one by one from a lower end of the seedling rest (3) and planting them in a field. ) And a grounding float (5) are supported by a planting transmission case (6) serving as a machine frame that also serves as a frame to form an eight-row planting type.

On the seedling mounting surface (3a) of the seedling mounting (3), at the end of the horizontal movement stroke of the seedling mounting (3), an endless belt type vertical with projections for vertically feeding the mounted seedlings by an amount equivalent to one planting. A feeding mechanism (7) is provided, and the planting mechanism (4) is configured to be able to change and adjust the amount of seedlings taken per plant.

Next, the drive structure of the vertical feeder (7) will be described.

As shown in FIGS. 1, 3, and 4, the vertical feed mechanism (7) winds an endless rotating belt (16) with a projection over a pair of upper and lower pulleys (15a) and (15b). It is arranged so that it turns slightly from the seedling mounting surface (3a). The lower drive pulley (15a) is rotated by a predetermined amount at the stroke end of the seedling mounting table (3) to feed the seedlings vertically. In other words, the sprocket member (1) that is rotatable around the coaxial center with the drive pulley (15a)
7) is attached via a one-way clutch (18), and the sprocket member (17) and the lower rotating support shaft (19) and the sprocket member (20) which can rotate integrally with the sprocket member via a chain (21). A rotating cam (23) attached to the rotating support shaft (19) and attached to a drive shaft (22) extending from the planting transmission case (6) at the stroke end of the seedling rest (3). ) Abuts and swings a drive arm (24) that is integrally connected.

Also, in synchronization with the vertical feed operation, there is provided a seedling presser (8) for changing the posture between a holding position for holding the seedlings to prevent lifting and a standby position for lifting upward and retreating to allow vertical feeding. It is provided.

As shown in FIGS. 1 and 2, a bracket (9) is erected on the upper surface of the unpartitioned portion (3A), and a balance-type swing arm (10) of the bracket (9) is pivotally supported. Then, the support portion (26) of the seedling presser (8) is attached to one end of the balance-type swing arm (10) in an idle state, and the seedling presser (8) is freely aligned with the mat-shaped seedling. The linkage mechanism (11) connected to the vertical feed mechanism (7) is connected to the other end of the balance-type swing arm (10).

A hexagonal drive shaft (12) having a drive pulley (15a) of the vertical feed mechanism (7) externally fitted thereto is installed, and the hexagonal drive shaft (12)
At the position corresponding to the strip partition (3A), a seedling presser (8) and a drive arm (13) are attached, and the drive arm (13) and the linkage mechanism (11) are linked with pins. The linking mechanism (11) is a linking rod penetrating the strip partition (3A). Further, the supporting portion (26) of the seedling presser is provided with a rod (14) that is loosely fitted to one end of the balance-type swing arm (10) and that spans the width of the seedling rest. It consists of a plurality of support rods (25) extending downward. A rod-shaped seedling presser (8) is fixed to the lower end of the support rod (25) to form a support portion (26). The balance-type swing arm (10) for driving the support portion (26) to ascend and the bracket (9) is referred to as a reversing mechanism.

With the above configuration, as shown in FIG. 2, when the vertical feed mechanism (7) operates, the hexagonal drive shaft (12) rotates by a predetermined angle, and the link rod (11) moves downward, The supporting portion (26) interlocked via the balance-type swing arm (10) lifts the seedling presser (8) and switches to the stand-by posture. When the vertical feed stops, the seedling presser (8) returns to the original posture.

[Another Embodiment] As shown in FIGS. 7 and 8, the rod (14)
Attach a bracket (28) to the bracket, form a mounting hole (28a) in the vertical direction with respect to the bracket (28),
It is configured so that it can be mounted with the relative height to the rod (14) of 5) changed. Therefore, the holding position of the seedling presser (8) can be changed according to the thickness of the mat-shaped seedling.

As shown in FIGS. 5 and 6, a holder (29) is supported by the bracket (28), and a support rod (25) is supported by the holder (29) so as to be vertically slidable. A spring (30) is mounted between the lower end of the holder (29) and the support rod (25) to urge the seed presser (8) downward.

The seedling holder (8) may be a plate instead of a rod,
The shape, installation, number and the like can be arbitrarily selected and used.

The vertical feed mechanism (7) may be a rotating body using a chain or the like in addition to the belt. Alternatively, it may be extruded in a cylinder type.

As the connecting mechanism (11), a wire mechanism or the like may be applied other than the rod.

The reversing mechanism (31) may be configured to combine gear trains and drive the support (26) in the opposite direction.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

Drawings show an embodiment of a seedling presser structure of a seedling rest according to the present invention, FIG. 1 is a configuration diagram showing a linking structure between a vertical feed and a seedling presser, and FIG. 2 shows an operation state of a seedling presser. FIG. 3 is a side view showing a vertical feeding structure, FIG. 4 is a side view showing a seedling planting apparatus, and FIGS. 5 and 6 show another embodiment of a mounting state of a support portion. FIGS. 7 and 8 are a rear view and a side view, respectively, showing another embodiment of the mounting state of the support. (3) ... Seedling stand, (7) ... Vertical feed mechanism, (8) ...
… Seedling holder, (11)… rotating mechanism, (26)… support part,
(31) ... Reversal mechanism.

Claims (1)

(57) [Claims] 1. A seedling holder (8) which raises a seedling holder (8) to a stand-by posture by raising the seedling holder from a holding posture for a seedling placed on the seedling mounting surface only during vertical feeding and to a standby posture. 3)
A support portion (26) of the seedling presser (8) provided above,
A seedling holding structure for a seedling holding base which is linked with a vertical feed mechanism (7) located below the seedling mounting base (3) via a linking mechanism (11); When the lifting mechanism is moved to the standby position, the linkage mechanism (11) is driven to move downward, and the reversing mechanism () switches the downward movement of the linkage mechanism (11) to the raising operation of the seed presser (8). 31) A seedling holding structure for a seedling holder, wherein the seedling holding tool (8) is connected to the reversing mechanism (31) so as to freely rotate around a connection point.