JPH048211A - Seedling planting device - Google Patents

Abstract

PURPOSE:To reduce the fabrication cost and to obtain an economical seedling- transplantation apparatus by attaching an elastic member to a seedling-pushing rod and restricting the protrusion limit of the rod in cushioned state by the contact of the elastic member with the inner face of a transplanting arm. CONSTITUTION:A seedling-pushing tool 15 is pushed until a cushion rubber 19 acting as an elastic member is brought into contact with the rod-supporting end face 5 of an arm 7. The force of a spring 20 is applied to an operation arm 17 in such a manner as to push out the seedling-pushing tool 15 to the acting position near the tip end of the seedling-transplantation claw 6. A rotary cam 21 to move a cam lever 17 against the force of the spring 20 is attached to a shaft 8a connected to a transplantation arm 7 of a driving rotary link 8 in a state to enable integral rotation of the cam and the shaft. The link connecting the rod and the cam lever is used also as a member to restrict the movement of the elastic member and reduce the fabrication cost of the apparatus.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a seedling planting device, and more specifically, for planting, a seedling pushing rod that can reciprocate along a claw is attached to a planting arm so as to be able to move in and out. A cam lever that is swing-driven by a rotating cam and the rod are interlocked and a spring is provided for urging the rod to protrude;
The present invention relates to a seedling planting device equipped with an elastic member that buffers and restricts the protrusion limit of the rod by coming into contact with the inner surface of the planting arm.

[Prior art] In this type of seedling planting device, conventional technology
In order to connect the cam lever and the seedling pushing rod, as shown in Japanese Patent No. 438, a sliding member shaped like a pinwheel is threaded onto the tip of the rod, and this sliding member and the tip of the cam lever are connected. It is known that a buffer ring is fitted onto a rod in a state in which the buffer ring is interlocked and connected by slidably engaging the buffer ring and is prevented from being removed by a nut portion of the sliding member.

This configuration has the advantage that the buffer ring has the effect of pushing the lubricating oil in the arm between the rod and the rod fitting portion of the arm.

[Problem to be solved by the invention]

However, in the prior art, the tip of the cam lever must be machined as a sliding contact part, and the inside upper and lower surfaces of the sliding member must be machined as a sliding contact part, and the body part of the cam lever must be machined as a sliding contact part. Since a flat surface is machined to insert the tip, and the sliding contact member and the rod tip are threaded, the overall cost of machining them is high, and there is still room for improvement. It was something.

An object of the present invention is to solve the above-mentioned problems.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides the seedling planting device described at the beginning, in which the tip of the cam lever and the inner end of the planting arm of the rod are connected to each other. The elastic member is interlocked and connected via a link that is pivotally connected to both ends, and the elastic member is fitted onto the rod in a state where movement in the direction of the link is restricted by contact with the end face of the link. The characteristic configuration is that it is equipped with

[For production]

According to the above configuration, (a) the tip of the cam lever and the tip of the rod are connected via a link, allowing relative changes between the cam lever that swings and the rod that moves in parallel, allowing for the conventional interlocking connection. At the same time, the pivot connection structure between the rod and each link of the cam lever can be formed by ordinary machining that does not require special precision, such as, for example, a bottle connection.

In addition, (0) the elastic member fitted to the rod restricts its movement by preventing the link end face from receiving the reaction force that comes into contact with the inner surface of the planting arm when the rod protrudes to its limit. Therefore, there is no need to separately provide a movement regulating member for the elastic member.

In other words, the link that interlocks and connects the rod and the cam lever also serves as a movement regulating member for the elastic member.

〔Effect of the invention〕

Therefore, by the effect of (a), it was possible to reduce the processing cost while having the necessary functions, and by the effect of (b), the movement restricting means for the elastic member fitted to the rod could also be constructed at a low cost. It was possible to rationally realize an economically superior seedling planting device.

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

FIG. 1 shows a seedling planting device in a walk-behind rice transplanter. That is, seedlings are planted using a planting arm (6) equipped with claws (6) in a planting case (not shown) that receives power from an engine.
7) are connected to each other via a drive rotation link (8) and a swing link (9) so as to be driven to swing up and down.

Then, by swinging the planting arm (7), the seedlings are planted using the claws (
6) moves up and down between the lower end of the seedling stand (4) and the field with its tip drawing a loop trajectory (T), and the mantle-shaped seedlings placed on the seedling stand (4) Cut out one block-shaped seedling from the lower end of (11) and take out the mat-shaped seedling (
11) and the seedling stand (4) are lowered into the field mud through the seedling retrieval opening (13) formed in the rail member (12) that supports the seedlings so as to be slidable in the lateral direction of the machine, and are then planted. It's like this.

For the above-mentioned planting, a sliding rod (for pushing out seedlings) is attached to the arm (7).
14), a seedling pushing tool (15) is attached to slide in the longitudinal direction along the claw (6), and a link (16) is attached to the sliding rod (14). The cam lever (F) for operating the seedling pusher that is linked with the support shaft (1
It is installed inside the planting arm (7) so that it can swing freely around the plant. Then, press the seedling pushing tool (15) until the cushion rubber (19) as an elastic member comes into contact with the rod support end surface (5) of the arm (7).
For planting seedlings, a spring (2) is attached to the operating arm (17) so as to push the seedling to the operating position near the tip of the claw (6).
0) and a rotating cam (21) that operates the cam lever (17) against the spring (20), the driving rotation link (8) is connected to the planting arm (7). It is attached to the shaft part (8a) so that it can rotate integrally.

Seedling planting is done when the claw (6) takes out the seedlings and when the seedlings are being taken out, the seedling planting is located on the proximal side of the claw (6), and when the claw (6) is planting the seedlings, the seedling planting position is located at the base end side of the claw (6). The seedlings are planted with nails (6
) to push out the holding cylinder from the seedling pusher (15).
However, seedling planting is performed by sliding operation in conjunction with the seedling planting movement of the claw (6).

As shown in FIG. 3, the link (work 6) consists of a pair of link plates (1), (1) and a pin (2),
(2), the tip of the sliding rod (14) is flattened to have an oval cross-sectional shape. And the sliding loft (14) has a ring-shaped cushion rubber (19).
At the same time, a washer (3) is interposed between the cushion rubber (19) and the link (16), and the inward movement of the cushion rubber (19) is reliably restricted at the end face of the link. .

As shown in FIG. 2, the cushion rubber (19) is
In the free state, its inner diameter is slightly smaller than the outer diameter of the sliding rod (14), and the abutment surface (22) with the opening/7d support end surface (5) is made thinner in the rod axial direction as the inner diameter increases. It is formed into an inclined surface of The lubricating oil (grease) in the arm (7) can be more reliably pushed between the rod (14) and the rod support part (23) of the planting arm (7).

[Another example]

As shown in FIG. 4, the contact surface (22) of the cushion rubber (19) may be provided with corrugated or ring-shaped irregularities.

Further, a cushion rubber (19) may be attached to the planting arm (7) side, and the above-mentioned inclined surface or uneven surface may be formed on the surface that contacts the one-shoe (3).

Note that although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not attached to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling planting device according to the present invention, FIG. 1 is a cross-sectional side view showing the main parts of the device, FIG. 2 is a cross-sectional view showing the state in which the elastic member is attached, and FIG. FIG. 4 is a perspective view showing the procedure for assembling the members, and is a diagram showing another embodiment of the elastic member. (6)......Claw for planting, (7)...Planting arm, (■4)...Rod, (16)...
... Link, (17) ... Cam lever, (1
9)...Elastic member, (20) Old... Spring, (
21) Rotating cam. Asahi 1 figure

Claims (1)

[Claims] A seedling extrusion rod (14) that can reciprocate along the planting claw (6) is attached to the planting arm (7) so as to be freely retractable, and a cam lever (17) is driven to swing by the rotating cam (21).
) and the rod (14) are provided with a spring (20) for urging the rod (14) to protrude, and the rod (14) is connected to the planting arm (
The seedling planting device is equipped with an elastic member (19) that buffers and restricts the protrusion limit of the rod (14) by contacting with the inner surface of the cam lever (17), the seedling planting device comprising: a tip of the cam lever (17) and the rod; (14) is interlocked with the inner end of the planting arm through a link (16) which is pivotally connected to both ends, and the elastic member (19) is connected to the inner end of the planting arm (16). ) A seedling planting device fitted to the rod (14) in such a manner that movement in the direction of the link (16) is restricted by contact with the end face.