JPH0353616Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention provides a mechanism for biasing the seedling presser against the seedlings placed on the seedling platform into a downward action state, and
The seedling presser is linked to the seedling vertical feeder so that when the seedling vertical feeder is driven, the seedling presser is raised to a deactivated state, and when the seedling vertical feeder is not driven, the seedling presser is lowered. The present invention relates to a seedling feeding device for a rice transplanter equipped with a seedling holding device drive mechanism for operating a seedling holding device.

[Conventional technology]

As shown in Japanese Patent Publication No. 57-22285, for example, the above-mentioned seedling feeding device prevents the placed seedlings from shifting laterally or falling off due to vibrations of the machine body, etc., by the pressing action of the seedling presser when the seedlings are fed horizontally. However, when vertically feeding the seedlings, the seedling holding device is lifted and released, so that the vertical seedling feeding device can smoothly feed the seedlings with little feeding resistance.

Conventionally, in this seedling feeding device, when the driving of the vertical seedling feeder stops, the seedling presser is instantly returned and lowered by a biasing mechanism, which has caused the following inconveniences.

[Problem that the invention attempts to solve]

That is, after the drive of the vertical seedling feeder has stopped, the seedling presser is returned to its operating state and lowered in an impactful manner by the biasing mechanism, and the impact of contact with the seedling presser causes soil collapse on the seedlings. In some cases, fatal injuries were caused.

The purpose of the present invention is to make it difficult for seedlings to be damaged by the seedling presser.

[Means for solving problems]

The characteristic configuration of the present invention is that, in the seedling supply device of the rice transplanter mentioned above, in the seedling presser driving mechanism, a driving rotary cam is brought into contact with a seedling presser side member that is interlocked with the seedling presser. The driving rotary cam is provided with an inclined cam surface portion that supports the seedling holding device side member so that the seedling holding device slowly descends to the operating state after the driving of the vertical seedling feeding device is stopped. In particular, its functions and effects are as follows.

[Effect]

Due to the inclination of the cam portion, the drive rotary cam slowly lowers the seedling presser regardless of the action of the biasing mechanism to gently act on the placed seedlings.

[Effect of idea]

Since the seedling holder gently contacts the seedlings, the seedlings will not be crushed even if the bed soil is fragile or soft, and the seedlings will not be damaged by the seedling holder being returned and lowered. It was possible to ensure that the holding and smooth vertical feeding of the seedlings were carried out reliably, while preventing the occurrence of stock defects due to damage to the seedlings.

〔Example〕

As shown in FIGS. 6 to 8, the seedling platform 1 equipped with a plurality of rows of seedling placement sections 1a is tilted so that its lower end is positioned toward the rear of the machine, and the seedling platform 1 A support part 3a for receiving the lower end of each of the pine-shaped seedlings 2 placed on the machine, and a plurality of seedling supply ports 5 for individually supplying seedlings to a plurality of seedling planting arms 4 arranged in parallel in the lateral direction of the machine body. It is attached to a transmission case 6 as a seedling planting device body through a guardrail 3 having a plurality of seedlings, and a plurality of seedling vertical feed wheels 7 are attached to the outer periphery in correspondence with the plurality of rows of seedling placement parts 1a. A part of the part protrudes from the through-hole of the seedling placement part 1a to the seedling placement surface side and is arranged so as to act on the placed pine-shaped seedlings 2, and is provided on the back side of the seedling placement stand 1. A plurality of rod-shaped seedling pressers 8a... or 8b... of two types, which are arranged in parallel in the width direction of the platform and have different lengths in the longitudinal direction of the seedling platform, are placed on the pine-shaped seedlings 2 on the seedling platform 1. It is provided on the side of the seedling mounting surface of the seedling mounting table 1 so as to be pressed against the surface of the seedling mounting table 1, and constitutes a seedling feeding device of a riding type rice transplanter.

The seedling platform 1 is configured to slide along the guard rail 3 in the lateral direction of the machine body. As shown in FIG.
0 is slidably passed through the transmission case 6, and is configured to be reciprocated by a driving rotary body 11 linked to the seedling planting arm 4, so that the seedling planting arm 4... Seedling planting nail 4
The seedling mounting table 1 follows the seedling planting movement of the seedling planting arm 4 so that block-like seedlings of a predetermined size are sequentially cut and taken out from one lateral end of the placed pine-like seedling 2 to the other end as shown in FIG. They are linked so that they can be transferred back and forth in the left and right directions of the aircraft.

A single rotary shaft 12 to which all of the seedling vertical feed wheels 7 are attached so as to be rotatable together is rotated by a swing arm 14 via a clutch 13 to which rotational force in only one rotational direction is transmitted. It is structured as follows. Then, the swing arm 14 is moved to the roller portion 14.
An operating arm 15 configured to be operated by contacting with a is swingably attached to the seedling stand 1 via a rotating shaft 16 and a plurality of supports 17...
When the seedling platform 1 reaches the left and right traverse stroke ends, one of the pair of swing arms 18a, 18b, which is integrally rotatably attached to the rotation shaft 16,
As shown in FIG.
Alternatively, the swing arm 14 is configured to swing by a set angle via the operating arm 15 by the swing arm 19b. In other words, every time the seedling platform 1 reaches the left and right horizontal seedling feed stroke end, all of the seedling vertical wheels 7 are rotated by the set angle by the rotary cams 19a or 19b to move the pine-shaped seedlings 2 on the table. The seedlings are transferred to the seedling supply port 5.

As shown in FIGS. 1 and 7, all of the seedling holding devices 8a... and 8b... include a rod 20 connecting them, a plurality of stays 21..., and a side wall portion of the seedling stand 1 or It is erected on the partition wall and attached to the seedling stand 1 via a plurality of supports 22. By attaching each of the plurality of stays 21 to the support 22 in a slidable manner, the seedling pressers 8a and 8b can be moved up and down with respect to the seedling platform 1, and act on each of the stays 21. The pine-shaped seedlings 2 are biased downward by a spring 23, which is an example of a biasing mechanism.

A rod 24 for raising and lowering the seedling holding devices 8a and 8b is attached to each of the plurality of stays 21, and the rod 24 is attached to the lower end of the seedling holding table 1 through the side wall or partition wall of the seedling holding table 1. It is formed so as to protrude from the back side. A plurality of swinging arms 25 are attached to the rotary shaft 16 so as to be integrally rotatable with one arm corresponding to each of the plurality of rods 24, the rotary shaft 16, and the rod 2.
The two swing arms 18a, 18b as the seedling holding tool side members that are brought into contact with and interlocked with the seedling presser 4, and the two drive rotary cams 19a, 19b, respectively,
Seedling pressers 8a and 8b are connected to the seedling vertical feed wheel 7.
A seedling presser driving mechanism 26 is configured to raise and lower the seedling presser. That is, when driving the seedling vertical feeding wheel 7,
As shown in FIG. 3, the rotating cam 19a or 19b operates the swinging arm 18a or 18b in the swinging direction A by means of the first circumferential cam portion 27 having an equal radius from the drive start point ON to the drive stop point OFF. For this purpose, the plurality of swing arms 25
... Each of them is swung in the same direction as the swiveling arm 18a or 18b, and the rod 24 is pushed up to lift all the seedling pressers 8a... and 8b to a released state. When the seedling vertical wheel body 7 is not driven, as shown in FIG. Because of the inclination in which the radius of the section 28 gradually decreases, the swinging arm 18a or 18b is caused to swing in the return direction B by the spring 23 and the return spring 29 acting on the swinging arm 14. Therefore, the swinging arm 25 is swinged in the same direction as the swinging arm 18a or 18b by the spring 23, and the second circumferential cam portion 28 is swinging due to the inclination. By supporting the movable arm 25 so as to swing back at a slow speed, the seedling pressers 8a and 8b are slowly lowered to the operating state.

In other words, when feeding the seedlings horizontally, the seedling presser 8a is
and 8b are activated, and when feeding the seedlings vertically,
The seedling pressers 8a and 8b are lifted and released so that the feeding resistance of the placed mat-like seedlings 2 is reduced. Furthermore, the seedling pressers 8a and 8b are returned and lowered at a slow speed so as to reduce the contact impact of the seedling pressers 8a and 8b, which are returned and lowered by the spring 23, on the mounted pine-shaped seedlings 2. It's like this.

Note that 30 shown in FIG. 1 is the swing arm 18a.
Or, when moving 18b horizontally on the seedling platform, rotate cam 1.
This is a stopper for holding in the standby position where it should come into contact with 9a or 19b.

In the case of the above-mentioned seedling presser drive structure, the time required from the time when the drive of the vertical seedling feed wheel stops until the seedling presser descends to the operating state becomes long.
When supplying seedlings, cut the planting part clutch,
It is advantageous to maintain the seedling presser in the lifted state while positioning the seedling platform at the stroke end because it is easy to time the clutch disengagement for this purpose.

[Another example]

In place of the seedling vertical feeding wheel 7, a swinging type feeding pawl may be adopted, and these are collectively referred to as the seedling vertical feeding tool 7.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling supply device in the rice transplanter according to the present invention, and FIG. 1 is a side view of the seedling presser drive mechanism;
Figures 2 to 4 are explanatory diagrams of the operation of the seedling presser, Figure 5 is a side view of the drive unit for the vertical seedling feeder, Figure 6 is a plan view of the seedling pedestal, and Figure 7 is the lateral feed of the seedling holder. A sectional view of the mechanism, and FIG. 8 is a partially cutaway side view of the seedling planting section of the rice transplanter. 1... Seedling mounting stand, 2... Placed seedlings, 7... Seedling vertical feeder, 8a, 8b... Seedling presser, 18a, 18b
... Seedling presser side member, 19a, 19b... Drive rotating cam, 23... Biasing mechanism, 26... Seedling presser drive mechanism, 28... Inclined cam surface portion.

Claims (1)

[Scope of utility model registration request] A seedling presser 8a for the seedlings 2 placed on the seedling table 1;
A mechanism 23 is provided for biasing the seedlings 8b into a downward operating state, and when the vertical seedling feeder 7 is driven, the seedling pressers 8a and 8b are raised to a released state, and when the vertical seedling feeder 7 is not driven, the The seedling presser 8a,
The seedling supply device for a rice transplanter is provided with a seedling presser drive mechanism 26 that operates the seedling pressers 8a and 8b in conjunction with the seedling vertical feeder 7 so that the seedling presser 8b is lowered, To configure the drive mechanism 26, the drive rotary cams 19a, 19b are connected to the seedling presser 8a,
Seedling holding tool side members 18a, 18b linked to 8b
and a slope supporting the seedling presser side members 18a, 18b so that the seedling pressers 8a, 8b slowly descend to the operating state after the seedling vertical feeder 7 stops driving. A seedling feeding device for a rice transplanter, in which a cam surface portion 28 is provided on the drive rotating cams 19a, 19b.