JPH044493Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is used in a seedling planting device of a rice transplanter. This invention relates to a seedling planting device in which a swinging arm, one end of which is connected to a fork that removes seedlings, is pivotally supported for drive and swing movement, and a compression coil spring is interposed to provide swinging driving force to the swinging arm. .

[Prior art]

Conventionally, in a seedling planting device having the above-mentioned configuration, as in Utility Model Publication No. 59-21608, a seat supporting the end of the compression coil spring is swingably provided, and the swing arm swings. As time progressed, a system was devised in which the catch was able to swing around a fulcrum.

[Problem that the invention attempts to solve]

With this device, the catch swings as the swing arm swings, so the coil spring does not bend or buckle, and the durability of the coil spring itself is improved, and the swing arm swings. Although dynamic drive is performed smoothly, it has a complex structure and is difficult to assemble in a small space, is expensive, and may cause wear to the swinging fulcrum of the catch, making it difficult to maintain smooth operation over a long period of time. There is a defect such that the operation cannot be expected.

The technical problem of the present invention is to provide a coil spring that does not buckle and deteriorate its function and durability, yet has a simple structure, low cost, and good durability.

[Means for solving problems]

The seedling planting device according to the present invention, which was devised to solve the above problems, is as follows.

A swinging arm, one end of which is connected to a fork that detaches the seedlings held by the planting claw, is rotatably supported inside a planting rod having a planting claw, and the swinging arm and the planting claw are connected to each other. In a seedling planting device in which a compression coil spring is interposed between the swing arm and the swing arm to apply swing driving force, the swing arm has a protrusion that fits inside the coil spring and projects from the main body. At the same time, a catch is provided in the middle of the projection in a direction perpendicular to the swinging direction of the swinging arm, and one end of the coil spring is supported by the projection and the catch. It is characterized by this.

[Effect]

The crank pin rotates and the planting rod swings up and down, scraping the seedlings at the upper position of the planting claw, and when the planting claw reaches the lower position, the base of the swinging arm comes into contact with the recess of the cam. The swinging arm is pressed by the elastic restoring force of the coil spring, and the fork is pushed down, pushing the seedling out of the planting claw and planting it on the ground.

〔Example〕

An example of the present invention will be described based on the drawings.
Reference numeral 1 denotes a planting rod whose intermediate portion is pivotally connected to a crank pin 3 at the tip of a crank arm 2, a planting claw 4 is attached to the tip, and the base is connected to the tip of a swinging rod 5. The portion from the vicinity of 3 to the tip side is formed hollow.

Reference numeral 6 denotes a fork rod inserted into the tip of the planting rod 1 so as to be able to move up and down, and a fork 6a at the lower end for pushing out the seedling 7 held by the planting claws 4 into the soil and planting it. is installed.

Reference numeral 9 denotes a swinging arm whose base portion is pivotally supported by a fulcrum pin 10, and whose base portion is in sliding contact with the circumferential surface of a cam 11 fixed to the crank pin 3.
The tip portion is interlocked and connected to the upper end of the fork rod 6.

A protrusion 9a that protrudes upward from the main body is integrally provided in the middle part of the swing arm 9, and a protrusion 9a in the direction perpendicular to the swing direction of the swing arm 9 is provided in the middle of the protrusion 9a. A catch pin 9b serving as a catch is integrally protruded.

On the other hand, a cover 13 forming a hollow part of the planting rod 1
A spring receiving recess 13a is formed in the middle of the spring at a position facing the protrusion 9a.

12 presses the base of the swinging arm 9 against the circumferential surface of the cam 11, and also connects the swinging arm 9 to the fork 6a.
is a coil spring that urges the spring to be pushed out, and the upper end of the spring is inserted into the spring receiving recess 13a.
The coil spring 12 is fitted and supported, and its lower end surface is covered with the protrusion 9a of the swinging arm 9, and its lower end is supported on the seat pin 9b, so that the lower end of the coil spring 12 does not come into direct contact with the main body of the swinging arm 9. It's summery.

The present invention is constructed as described above, and when the crank pin 2 rotates, the planting claws 4 move up and down in a fixed trajectory, scrape off the seedlings from above, and descend to insert the seedlings into the field. However, when the planting claw 4 is at the upper dead center (Fig. 2), the base of the swing arm 9 is in contact with the convex part of the cam 11, and the planting claw 4 is at the lower dead center (the third
When the base of the swing arm 9 reaches the position shown in FIG.
The fork 8 pushes out the seedling from the planting claw 4 and inserts it into the muddy soil.

At this time, the coil spring 12 is covered with the protrusion 9a of the swing arm 9, and the central part of the end surface is supported by the seat pin 9b.
As the spring 12 swings, the end surface of the spring 12 tilts in a seesaw manner on the seat pin 9b as shown in FIG.

For example, when the fork rod 6 is at the top dead center position, the coil spring 12 is oriented linearly in the U direction,
When at the bottom dead center, the coil spring 12 is oriented linearly in the D direction, and the coil spring 12 operates smoothly without bending and buckling, and therefore the seedling pushing operation of the fork 8 is performed accurately.

[Effect of idea]

One end of the coil spring is supported by a protrusion provided integrally with the main body of the swinging arm and a catch provided in the middle of the protrusion, and the end surface of the coil spring moves above the catch as the swinging arm swings. By making the coil spring tilt like a seesaw, the swinging drive action is performed smoothly without causing buckling due to bending of the coil spring.
Unlike No. 21608, which is complicated and does not cause wear, it has a simple structure and is easy to assemble, reducing costs and maintaining smooth operation over a long period of time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a side view of a planting rod partially shown in cross section, FIGS. 2 and 3 are side views of the main parts, and FIG. FIG. 4 is a plan view of the coil spring seat, and FIG. 5 is an explanatory diagram of its operation. 1... Planting rod, 4... Planting claw, 6a... Fork, 9... Swinging arm, 9a... Projection, 9b...
...Socket pin, 12...Coil spring.

Claims (1)

[Scope of utility model registration request] A swinging arm, one end of which is connected to a fork that detaches the seedlings held by the planting claw, is pivotally supported inside a planting rod having a planting claw so that the swinging arm can be driven and moved. In a seedling planting device in which a compression coil spring is interposed between the swinging arm and the swinging arm to provide swinging driving force, the swinging arm has a protrusion that fits inside the coil spring and protrudes from the main body. At the same time, a catch is provided in the middle of the projection in a direction perpendicular to the swinging direction of the swing arm, and one end of the coil spring is supported by the projection and the catch. A seedling planting device characterized by: