JPH04200310A - Seedling pressing structure of seedling placing stand - Google Patents

Abstract

PURPOSE:To stop vertical movement of a seedling placing stand by driving and moving linking mechanism downward and installing inverting mechanism of converting downward movement of the linking mechanism to rising actuation of supporting tool. CONSTITUTION:When longitudinally sending mechanism 7 is operated, a hexagonal drive shaft 12 is rotated by a given angle, a connecting rod 11 is moved downward and a supporting tool 26 linking through a balance type rocking arm 10 changes a seedling pressing tool 8 to a raising waiting attitude. When the longitudinal sending is stopped, the seedling pressing tool 8 is returned to the original attitude.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that the seedling presser is raised from the holding position for the seedlings placed on the seedling placing surface to the standby position only during vertical feeding. A support for supporting the seedling holding device installed on the seedling tray and a vertical feeding mechanism located below the seedling tray are interlocked via a linkage mechanism so as to move the seedling tray up and down. Regarding the seedling holding structure of the stand.

[Conventional technology]

Conventionally, in the seedling holding structure of this type of seedling stand, as shown in, for example, Japanese Utility Model Application Publication No. 2-26419, a vertical rod serving as a linking mechanism is moved upward as the vertical feeding mechanism is operated. Then, by upward movement of the linkage mechanism, the supporting device attached to the vertical rod and moving together is lifted, and the seedling holding device is raised to the standby position.

[Problem to be solved by the invention]

Therefore, since the vertical rod that interlocks the vertical feed mechanism with the supports located above and below the seedling stand is moved upward, the upward movement force of the support and the sliding force of the seedling stand that guides the vertical rod are In response to the frictional upward movement force received through the moving guide, the seedling stand moves up and down with respect to the support part that supports itself, and each time it moves, it produces an impact sound as it falls back to its original position. There was room for improvement.

An object of the present invention is to provide a device that can stop the vertical movement of a seedling stand by adding a simple reversing mechanism.

[Means to solve the problem]

The characteristic configuration of the present invention is that when the seedling holding device is raised to the standby position, the linking mechanism is driven downward and a reversing mechanism is provided that switches the downward movement of the linking mechanism to the lifting operation of the support tool. The functions and effects are as follows.

[For production]

That is, by moving the interlocking mechanism downward, the supporting tool moves upward via the reversing mechanism, and the seedling holding tool is raised to the standby position. Therefore, a downward moving force acts on the seedling pedestal, and the seedling pedestal is not moved upward relative to its supporting portion.

〔Effect of the invention〕

By simply modifying the device by installing a reversing mechanism, the driving force from the vertical feed mechanism does not act as upward movement force on the seedling stand, thereby eliminating the vibration phenomenon associated with the upward movement of the seedling stand. I can do it.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 shows a seedling planting device (1) according to the present invention.

This seedling planting device (1) is connected to the rear part of a traveling body (not shown) via a link mechanism so that it can be raised and lowered, and is tilted backwards and downwards, and reciprocates left and right with a constant stroke. Seedling stand (3), planting mechanism (4) that cuts out seedlings one by one from the lower end of the seedling stand (3) and plants them in the field.
A grounding float (5) and the like are supported by a planting transmission case (6) which also serves as a frame to form an 8-row planting type.

The seedling placing surface (3a) of the seedling placing stand (3) has an endless surface with protrusions that vertically feeds the placed seedlings in rows at a time at the end of the horizontal movement stroke of the seedling placing stand (3). A belt-type vertical feed mechanism (7) is installed, and a planting mechanism (4) is installed.
- The structure is such that the amount of plants and seedlings taken can be changed and adjusted.

Next, the drive structure of the vertical feed device (7) will be explained.

As shown in FIGS. 1, 3, and 4, the vertical feeding mechanism (7) includes a pair of upper and lower pulleys (15a).

An endless rotary belt (16) with protrusions is wound around (15b) and is arranged so as to slightly protrude from the seedling placement surface (3a). And the lower drive pulley (15a)
is rotated by a predetermined amount at the stroke end of the seedling table (3) to vertically feed the placed seedlings.

In other words, the one-way clutch (18) connects the sprocket member (17) which is rotatable around the drive pulley (15a) and the same axis.
This sprocket member (17), the lower rotation support shaft (19), and a sprocket member (20) which can rotate integrally are interlocked and connected via a chain (21). The rotating cam (23) attached to the drive shaft (22) extending from the planting transmission case (6) comes into contact with the dynamic support shaft (19) at the stroke end of the seedling platform (3) and swings. A drive arm (24) is integrally provided.

In addition, in synchronization with the above-mentioned vertical feeding operation, a seedling holding tool (8) changes its posture between a holding posture in which the placed seedlings are held down to prevent them from floating up, and a standby posture in which they are lifted upward and retracted to allow vertical feeding.
is provided.

As shown in Figs. 1 and 2, a bracket (9) is provided upright on the upper surface of the row partition (3A), and a scale-type swinging arm (lO) is pivotally supported on this bracket (9). ,
A seedling holding tool (8) is attached to the negative end of this scale-type swinging arm (10).
To install the support tool (26) in an idle state, use the seedling holder (8).
It is configured so that it can freely follow the mat-like seedlings, and a linkage mechanism (11) connected to the vertical feed mechanism (7) is connected to the other end of the scale-type swinging arm (10).

A hexagonal drive shaft (12) to which the drive pulley (15a) of the vertical feed mechanism (7) is fitted is installed, and this hexagonal drive shaft (1
The drive arm (13) of the seedling presser (8) is attached to the position corresponding to the row partition (3A) of 2), and the drive arm (13) and the linkage mechanism (11) are linked with a pin. This linkage mechanism (11) is a linkage rod that passes through the row partition (3A). The supporter (26) of the seedling presser includes a rod (14) that is loosely fitted to one end of the scale-type swinging arm (10) and is installed across the width of the seedling stand, and a rod (14) that extends from the rod (14) It consists of a plurality of support rods (25) extending downward.

A rod-shaped surface presser (8) is fixed to the lower end of this support rod (25) to constitute a supporter (26). This support (26)
The scale-type swinging arm (10) and the bracket (9) that drive the lever upward are 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 linking rod (11) moves downward. A support (26
) lifts the seedling holder (8) and switches it to the standby position. When the vertical feed is stopped, the seedling presser (8) returns to its original position.

[Another example]

■ As shown in Figures 7 and 8, the rod (14
) and attach the bracket (28) to this bracket (2).
A mounting hole (28a) is formed in the vertical direction with respect to 8), so that the support rod (25) can be mounted while changing the relative height to the rod (14). Therefore, the holding position of the seedling presser (8) can be changed depending on the thickness of the mat-like seedlings.

■ As shown in Figures 5 and 6, the bracket (
A holder (29) is pivotally supported on the holder (28), and a support rod (25) is supported on this holder (29) so as to be able to slide vertically.
) and attach a spring (30) between it and the seedling presser (8).
) is biased downward.

■ The seedling presser (8) may be a plate instead of a stick.
Its shape, installation, number, etc. can be arbitrarily selected and used.

■ The vertical feed mechanism (7) may be a rotating body using a chain or the like instead of a belt. Alternatively, it may be extruded in a cylindrical manner.

(2) As the connection mechanism (11), a wire mechanism or the like may be used instead of a rod.

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

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling holding structure of the seedling stand according to the present invention, FIG. 1 is a configuration diagram showing the linkage structure between the vertical feed and the seedling holding device, and FIG. 2 shows the operating state of the seedling holding device. 3 is a side view showing the vertical feeding structure, FIG. 4 is a side view showing the seedling planting device, and FIGS. 5 and 6 each show another embodiment of the mounting state of the support. 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 presser, (11)...
...Axis mechanism, (26) ...Support, (31)
...Reversing mechanism.

Claims (1)

[Claims] The seedling holding device (8) is installed on the seedling resting table (3) so that the holding position for the seedlings placed on the seedling resting surface is elevated above the seedling resting surface only when vertically feeding, and the raising and lowering operation is performed to the standby position. A support (26) that supports the seedling presser (8), and a vertical feeding mechanism (7) located below the seedling rest (3),
The seedling holding structure of the seedling stand is linked via a linking mechanism (11), and when the seedling holding tool (8) is raised to the standby position, the linking mechanism (11) is moved downward. A seedling holding structure for a seedling stand, which is provided with a reversing mechanism (31) for driving movement and switching the downward movement of the linkage mechanism (11) to the upward movement of the support (26).