JP2907658B2 - Seedling planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling pushing rod, which is reciprocally movable along a seedling planting claw, is mounted on a planting claw support case so as to be able to move back and forth, and the rod is urged to project by a spring. The present invention relates to a seedling planting device.

[0002]

2. Description of the Related Art Conventionally, in the above-described seedling planting apparatus, as shown in Japanese Patent Application Laid-Open No. 4-8211, for example, an arm which is driven to swing by a cam mechanism accompanying the operation of a planting claw and a seedling pushing-out device are used. The rod and the rod are interlockingly connected via a link plate, and a cushion rubber as an elastic buffer is externally fitted to a portion of the rod on the plate side via a washer. There is a configuration in which the regulation is performed by a contact action between the rubber and the inner surface of the planting nail supporting case.

[0003]

In the above-mentioned conventional structure, the rod for pushing out the seedling, which is slid and moved vigorously by the spring urging force in connection with the planting operation, is surely stopped at the tip position of the planting claw. Cushion rubber is interposed in order to suppress the generation of noise due to the impact of the contact between the metals during the contact regulation. However, in the above-described conventional structure, it is preferable to set the cushion rubber to a lower hardness in order to enhance the cushioning function and the soundproofing function. The operation is performed a considerable number of times even in a single field, and the durability of the rubber itself becomes a problem due to long-term operation. Therefore, in order to improve the durability, the higher the hardness of the rubber, the better. However, in this case, there is an adverse effect that the buffer function is reduced. An object of the present invention is to eliminate the above contradictions by a rational configuration.

[0004]

According to a characteristic feature of the present invention, a seedling pushing rod, which is reciprocally movable along a seedling planting claw, is attached to a planting claw support case so as to be able to move back and forth, and the rod is spring-loaded. A seedling planting device which is protruded and urged by the contacting portions between the inner end of the rod and the inner surface of the planting claw support case, respectively, so that the planting operation can be performed. The elastic buffer that regulates the sliding operation limit of the accompanying rod is interposed, the hardness of the other elastic buffer is set to be smaller than the hardness of one elastic buffer, and the thickness of the elastic buffer on the small hardness side is set. The point is that the thickness of the elastic buffer on the higher hardness side is set smaller than that of the elastic buffer, and the contact surfaces of these elastic buffers are formed on uneven planes.

[0005]

[Effect] Each of both sides at the position of the positioning contact for regulating the position of the sliding stroke of the rod for pushing out the seedling,
With the elastic buffer interposed, the sliding operation limit of the rod is regulated by the contact of the elastic buffers, so the sliding operation limit of the rod is restricted by the contact between the metal and the elastic buffer. The impact sound at the time of the contact operation can be made weaker than in the case of restricting. Moreover, one of the elastic buffers is made of a material having a high hardness and the other is made of a material having a low hardness, so that the elastic buffer having a low hardness can sufficiently absorb the impact force and sufficiently suppress the vibration noise. In addition to being able to spread to the surface of the low-hardness elastic buffer that is crushed by the impact force at the time of contact and is likely to be spread laterally, the elastic buffer with high hardness allows it to expand to some extent. By effectively preventing spread, and reducing the surface fatigue of the low-hardness elastic buffer, it is possible to suppress adverse effects such as early cracking of the low-hardness elastic buffer. In addition, while the high-hardness elastic buffer is made thicker, the low-hardness elastic buffer is made thinner, so that the low-hardness elastic buffer can be greatly expanded in the lateral direction due to contact. It can be further suppressed. Furthermore, since the contact surface of the elastic buffer is formed in an uneven plane, the deformation associated with the contact of the low hardness elastic buffer is restricted in the lateral direction, and the locality of the low hardness elastic buffer accompanying the contact is restricted. The deformation of the low-hardness elastic buffer can be prevented, and the amount of local deformation of the low-hardness elastic buffer can be reduced.

[0006]

Thus, by devising the hardness, softness, thickness, and contact surface of the elastic buffer, noise and vibration during the planting operation of the seedling can be satisfactorily suppressed, and the elastic buffer can be satisfactorily suppressed. It is possible to improve the durability by minimizing the surface fatigue at the contact points of the above.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
1 shows a seedling planting device in a walking rice transplanter. In this seedling planting apparatus, the planting claw 2 attached to the planting claw support case 1 draws a substantially elliptical locus in a side view while the seedling rest 3
The mat seedlings 4 placed on the ground are taken out one plant at a time and planted in a field scene. More specifically, the planting claw support case 1 is connected and supported by a swinging crank mechanism including a swing arm 5 and a rotating arm 6 so as to be vertically driven, and is integrally fixed to the planting claw support case 1. 2 moves up and down between the vicinity of the lower end of the seedling rest 3 and the field while the tip of the seedling almost describes an elliptical locus, and slides one stock of the mat seedling 4 placed on the seedling rest 3 on a sliding rail. Seedling outlet 8 formed in 7
And planted in a field scene. The planting nail supporting case 1 slides in the longitudinal direction along the planting nail 2 via a sliding rod 9 for pushing out the seedling and holds the planting seedling held by the planting nail 2 in the field mud. A seedling extruding tool 10 for extruding the inside is provided. A pushing operation arm 12 is mounted on the sliding rod 9 via a link plate 11 in the planting claw support case 1 so as to be swingable around a support shaft 13. A coil spring 14 that pushes the seedling pushing tool 10 to the tip of the planting claw 2 is provided in the middle of the operation arm 12, and the operation arm 12 is operated to the retreat side against the urging force of the coil spring 14. A rotating cam 15 is attached to a connecting pivot 16 between the rotating arm 6 and the planting claw support case 1 so as to be rotatable integrally. In this way, the seedling pushing-out tool 10 is located at the base end of the planting nail 2 when the planting nail 2 is taken out and descends, and when the planting nail 2 enters the field, the working position is set. Then, the holding seedlings are pushed out from the planting claws 2 so as to be slid in conjunction with the seedling planting operation.

In the above-described sliding operation, when the seedlings are pushed out, the sliding rod 9 is configured to abut at a predetermined position. That is, as shown in FIG. 2, a ring-shaped first cushion rubber 18 [an example of an elastic buffer] is externally fitted to a link plate connecting portion of the sliding rod 9 via a washer 17, and the action position is changed. In this first
A second cushion rubber 19 (an example of an elastic buffer) for positioning the cushion rubber 18 in contact with the cushion rubber 18 is positioned on the rod supporting portion end face 20 of the planting claw support case 1 and externally fitted to the rod 9. The first cushion rubber 18 is made of a low-hardness rubber material so as to exhibit a function of absorbing a striking sound at the time of contact impact, and to minimize the deformation at the time of contact to improve durability. In addition, the second cushion rubber 19 is formed of a rubber having a high hardness to enhance durability, and is formed to be thick to enhance a cushioning function against an impact at the time of contact and suppress generation of vibration noise and the like. is there. That is, the hardness of the first cushion rubber 18 is set lower than the hardness of the second cushion rubber 19, and the thickness of the first cushion rubber 18 is set smaller than the thickness of the second cushion rubber 19. In addition, the contact surfaces of the first cushion rubber 18 and the second cushion rubber 19 are formed in uneven planes.

[Another Embodiment] A first cushion rubber 18 formed of a thin material of low hardness rubber is located on the end surface 20 of the rod support portion, and a second cushion rubber 19 formed of a material of high hardness thick rubber is provided. May be provided at the link plate connection point.

[0010] 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 by the entry.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of a planting nail support case.

FIG. 2 is a cutaway front view of a cushion rubber disposition portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Planting claw support case 2 Planting claw 9 Rod 14 Spring 18 and 19 Elastic buffer

Claims (1)

(57) [Claims] 1. A seedling pushing rod (9) reciprocally movable along a seedling mounting claw (2) is attached to a planting claw support case (1) so as to be able to move back and forth, and the rod (9) is attached. Spring (14)
A planting and planting device which is protruded and biased by the above method, wherein the planting and planting device contact each other at a positioning contact position between the inner end of the rod (9) and the inner surface of the planting claw support case (1) .
Of rod (9) caused by seedling planting operation
Elastic shock absorbers (18) and (19) intervening to limit the dynamic limit
So that the hardness of one elastic buffer (19) is smaller than the hardness of the other elastic buffer (19).
The hardness of the elastic buffer (18) is set to small, and the elasticity of the small hardness side
The thickness of the buffer (18) is set to be larger than that of the elastic buffer (19).
Is set smaller than the thickness of both elastic cushions (1
8) and (19) the seedling planting device in which the contact surface is formed in an uneven plane .