JPH11137028A - Structure for regulating longitudinal feed amount of seedling in seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for longitudinally feeding seedlings, capable of readily assembling and maintaining smooth operation. SOLUTION: This structure for controlling longitudinal feed amount of seedlings in a seedling transplanter is equipped with a longitudinal feed device 18 for rotating a driving arm 22 engaged through one-way rotating clutch to a driving shaft 20 returned, rotated and pressed to a standard waiting position by a set amount against pressing force by a rotating cam 24 and longitudinally feeding placed seedlings in a set amount in a horizontal moving stroke end of a seedling placing table 1 on which seedlings for planting are carried and horizontally reciprocated, and a control operating tool for controlling the position of a regulating member 25 for regulating the standard waiting position of the driving arm 22 in rotating direction. In the structure, the regulating member 25 is laid and supported over a pair of supporting members 26 externally fitted relatively rotatably to the driving shaft 20 on right and left both sides of the driving arm 22, and an engaging member 27 interlocked and connected to right and left both sides of the regulating member 25 is engaged with the control operating tool.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical feed drive shaft which is urged to return to a reference standby position at the end of a horizontal movement stroke of a seedling rest on which seedlings for planting are placed and reciprocally move sideways. The drive arm linked via a directional rotation clutch is rotated by a set amount against a biasing force by a rotating cam, and is provided with a vertical feed device for feeding the seedlings vertically by a set amount. The present invention relates to a vertical seedling feed amount adjusting structure in a seedling planting apparatus provided with an adjusting operation tool for adjusting a position of a regulating member for regulating a reference standby position in a rotating direction.

[0002]

2. Description of the Related Art In the structure for adjusting the amount of seedlings vertically fed in the above-described seedling planting apparatus, conventionally, for example, Japanese Patent Application No. 4-193327 is disclosed.
As shown in the figure, a contact pin is fixed in a cantilever manner to an arm that is rotatably attached to the drive shaft for vertical feed, and the contact pin rotates the drive arm of the one-way rotating clutch. A pin fixed to the drive arm in a cantilever manner is linked to an adjusting operation tool via a long hole linking member (corresponding to the regulating member) to change the reference standby position of the drive arm. There was a configuration in which the vertical feed amount was changed.

[0003]

However, in the above-mentioned conventional structure, the contact pin is fixed to the rotating arm in a cantilever manner. It is necessary to accurately process the pivot boss of the drive arm so that it will not be twisted or rattled, and welding is required to form the contact pin firmly in a cantilever shape However, there is a disadvantage that the number of processing steps is increased and the manufacturing cost is increased, and there is room for improvement. An object of the present invention is to eliminate the above disadvantages.

[0004]

According to a feature of the present invention, in the seedling planting apparatus described at the beginning, in the structure for adjusting the amount of vertical feed of seedlings, the left and right sides of the drive arm are rotatable relative to the drive shaft. The present invention is characterized in that the regulating member is erected and supported over a pair of fitted support members, and a linking member interlockingly linked to both left and right end portions of the regulating member is linked to the adjusting operation tool.

[0005]

The position of the regulating member for regulating the contact of the drive arm is adjusted by the adjusting operation tool via the interlocking members which are interlocked on the left and right sides of the drive member. , The contact reaction force is supported, so that there is little possibility of occurrence of stiffness and rattling due to torsion. In addition, since the regulating member has a two-sided support structure, it is possible to adopt a simple linkage structure by, for example, fitting engagement, and it is not necessary to perform a troublesome process such as welding.
Further, since the regulating member is supported in a double-supported state by a supporting member rotatably provided around the same axis as the drive arm, even when the position of the regulating member is changed and adjusted,
The relative positional relationship between the regulating member and the drive arm is always constant, and the precision of the vertical seedling change adjustment can be increased.

[0006]

According to the present invention, it is possible to perform a smooth operation in which rattling and stiffness are less likely to occur due to a rational linking support structure, and to simplify the assembling work and reduce the production cost. The vertical feed structure can be provided.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows a seedling planting apparatus. This seedling planting apparatus comprises a seedling stand 1 on which seedlings for planting are placed and which reciprocate and reciprocate at a constant stroke, and six planting mechanisms for picking and planting seedlings one by one from the lower end of the seedling stand 1. It is provided with two or three leveling floats 3 and the like, and is connected to a rear part of a riding type traveling body (not shown) via a link mechanism 4 so as to be able to move up and down and to roll freely around the longitudinal axis Y. A feed case 6 is attached to a pivot boss 5 formed on a rear link 4a of the link mechanism 4 so as to be relatively rotatable around a longitudinal axis Y, and a square pipe-shaped main frame 7 is bolted below the feed case 6. Are tightened and connected. The main frame 7 extends in the lateral direction, and is formed by welding and connecting a pair of sheet metal members bent and formed in a U-shaped cross section at a mating surface portion. Power is transmitted to the feed case 6 from the traveling machine body via a power take-off shaft 8, and the power is transmitted to the feed case 6 by the lateral feed drive mechanism of the seedling rest 1 and the planting mechanism 2.
It is configured to supply to.

As shown in FIG. 4, on the rear surface side of the main frame 7, three planting cases 9 are bolted in a cantilever manner toward the rear at predetermined intervals, and are connected by bolts. The planting mechanism 2 is disposed on each of the left and right sides of the rear part of the planting case 9 so as to form a six-row planting. That is, each planting case 9
Case 1 via a chain transmission mechanism 10 installed inside
1 by rotating the rotating case 11 so that the tips of the planting claws 12 attached to both ends vertically move along a substantially elliptical locus by a cam mechanism (not shown) provided in the case 11. The planting mechanism 2 is configured. Then, each of the planting mechanisms 2 is connected to the feed case 6 via a lateral drive shaft 13 provided on the outside of the rear side of the main frame 7.
The power is branched and transmitted.

A sliding rail 14 that slidably supports the lower end of the seedling placed on the seedling mounting table 1 is slid up and down by an adjusting lever 15 to change the amount of seedling taken out by the planting claws 12 in a plurality of stages. It is configured to be adjustable. That is,
A seedling removal amount adjusting lever 15 is attached to a horizontal shaft 16 rotatably supported on the planting case 9 near the sliding rail 14.
A drive arm 17 for engaging the sliding rail 14 is extended from the horizontal shaft 16 and the adjusting lever 15 is turned up and down to supply the sliding rail 14, that is, the entire seedling rest to the seedling supply. It is configured so that it can be slid along the direction.

The seedling gantry 1 is provided with a vertical feeding device 18 for vertically feeding the seedlings placed by a predetermined amount toward the planting mechanism 2 at the end of the horizontal movement stroke. As shown in FIG. 2, the vertical feed device 18 has a pair of upper and lower pulleys 18a and 18b wound around an endless vertical feed belt 18c with a protrusion, and drives and rotates the lower pulley 18b. And is configured to operate vertically. That is, each drive side pulley 18b is externally fitted to the hexagonal drive shaft 20 extending over substantially the entire width of the seedling rest 1 so as to be able to transmit torque, and a ball clutch type one-way rotation clutch [FIG. Not shown]
At the end of the stroke of the seedling gantry 1 with respect to the drive arm 22 which is rotationally biased downward, the feed case 6
A rotary cam 24 provided on a vertical feed rotary shaft 23 projecting laterally and outwardly comes into contact with the rotary cam 24 and rotates by a predetermined amount to rotate the vertical feed belt 18c by a predetermined amount. .

A regulating pin 25 (an example of a regulating member) for regulating the reference standby position of the drive arm 22 is provided so as to be freely adjustable in the rotating direction, and the rotational vertical feed amount by the rotating cam 24 can be changed and adjusted. It is configured as follows. To elaborate,
As shown in FIG. 3, on both left and right sides of the drive arm 22, a regulating pin 25 is inserted through a pair of left and right support members 26, 26 which are idlely fitted to the drive shaft 20 to support the drive shaft 22 and prevent it from falling off. It is. Further, in a state where the drive arm 22 is straddled from the upper side, the U-shaped linking member 27 is inserted into the left and right ends of the regulating pin 25 to engage and engage, and the regulating pin 25 is hooked and engaged on both left and right sides. Coil spring 2
8, 28 pulls downward. As described above, the regulating position adjusting structure is constituted by the insertion engagement linkage, and does not require a troublesome manufacturing process such as welding of the cantilever member, and hardly causes stiffness and rattling. An operation wire 29 is screwed and linked to the laterally extending portion 27a above the linking member 27 with a screw.
Arm 30 integrally formed with the horizontal shaft 16 for adjusting the amount of seedlings collected
When the adjustment is made to change the seedling picking amount to a larger side while allowing the reciprocating lateral movement of the seedling cradle 1, the vertical feed amount is changed to a larger side, and the seedling collecting amount is changed to a smaller side and adjusted. An interlocking operation is performed so that the vertical feed amount is changed to the small side. Therefore, in this configuration, the seedling picking amount adjusting lever 15 also serves as the adjusting lever for the vertical feed amount.

As described above, in place of the configuration in which the lever for adjusting the vertical feed amount and the lever for adjusting the amount of seedlings are also used, a configuration in which an adjustment lever dedicated to adjusting the vertical feed amount may be provided.

[0013] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling planting apparatus.

FIG. 2 is a side view of a vertical feeder.

FIG. 3 is a front view of a vertical feed amount adjusting mechanism.

FIG. 4 is a simplified plan view of a seedling planting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seedling stand 15 Adjustment lever 18 Vertical feeder 20 Drive shaft 22 Drive arm 24 Rotating cam 25 Restriction member 26 Support member 27 Linkage member

Claims (1)

[Claims] At the end of a horizontal movement stroke of a seedling rest (1) on which seedlings for planting are placed and reciprocally move sideways, a vertical feed drive shaft (20) which is urged to return to a reference standby position.
To a drive arm (2)
2) is provided with a vertical feed device (18) for rotating the set seedling longitudinally by rotating a set amount against a biasing force by a rotating cam (24) against the urging force, and A seedling vertical feeding amount adjusting structure for a seedling planting device including an adjusting operation tool (15) for adjusting a position of a regulating member (25) for abutting the reference standby position in a rotation direction, wherein the drive arm A pair of support members (26), (2) which are rotatably fitted to the drive shaft (20) on both left and right sides of (22).
6) The control member (25) is erected and supported over a period of 6), and a linking member (27) interlockingly connected to both left and right ends of the control member (25) is linked to the adjustment operation tool (15). Structure for adjusting the amount of seedlings vertically fed in the planting device.