JP5858383B2 - Doyo ring - Google Patents

Description

  The present invention relates to an earthen wheel in a transplanter or a seeder.

  In general, the earthen wheel is required to have the action of crushing and pulling the ground (crushing and earthing action) and the action of preventing the dirt from adhering to the wheel surface (action to prevent adhesion of the earth). It is done. In the case where the adhesion interface does not deform, such as an iron wheel, it exerts a crushing and soiling effect well. The trouble that it ends up occurs. On the other hand, in the case where the adhesion interface is softly formed, for example, a soft foam, the adhesion prevention function such as soil is exhibited well, but there is a problem that the crushing action and the earth contribution function are reduced.

  As a conventional example proposed to solve such a problem, there is a wheel described in Patent Document 1. As shown in FIG. 5, the wheel includes a hard cylindrical rim 53, an elastic body 51 that is externally provided on the outer peripheral surface thereof, and a fluororesin film 52 that is integrally coated on the outer peripheral surface of the elastic body 51. It is made up of. The integrated elastic body 51 and fluororesin film 52 have a surface hardness of 20 to 80 by JISA on the fluororesin film surface. The elastic body 51 has a plurality of ribs 55 that form a circumferential direction on the inner peripheral surface, and the ribs 55 are elastically attached to the outer peripheral surface of the cylindrical rim 53 to form a gap between the ribs. The thickness of the fluororesin film 52 is 10 to 200 μm. According to this rolling wheel, the soil containing moisture first contacts the surface film, but does not absorb moisture and does not adhere because it is non-adhesive. At times, it will fall off due to deformation of the elastic body.

  As another conventional example, there is a earthen wheel described in Patent Document 2. As shown in FIG. 6, the earthen wheel 71 has a hard cylindrical rim 72 and an elastic covering the cylindrical rim 72 so as to be in close contact with the inner peripheral surface of the cylindrical rim 72 and detachable from the outer peripheral surface. And a filling material 74 that is filled and sealed in a space formed between the outer peripheral surface of the cylindrical rim 72 and the inner surface of the covering portion 73 and is more flexible than the covering portion 73. ing. The cylindrical rim 72 includes a through hole (not shown) for injecting a filling material 74 into the space, which communicates the inner and outer peripheral surfaces of the cylindrical rim 72. A valve 77 is attached. In FIG. 6, an arrow F indicates the front side of the aircraft.

Japanese Patent No. 2818020 JP 2008-212034 A

However, the wheel of Patent Document 1 is provided with a two-layered elastic means comprising an elastic body 51 and a fluororesin film 52 on the outer peripheral surface of the cylindrical rim 53. In this structure, it is difficult to peel off the fluororesin film 52 in manufacturing, and it is difficult to adhere to the elastic body 51, and there is a problem that durability is inferior in practical use.
In addition, the edge of the outer peripheral surface of the roller wheel is a portion that is strongly pressed by the field, but the inside of the portion (the edge of the inner peripheral surface of the elastic body 51 and the edge of the outer peripheral surface of the cylindrical rim 53). In this part, the elastic body 51 and the fluororesin film 52 are pressed against the corner 53a of the outer peripheral edge of the cylindrical rim 53 and bent and deformed. And the restoration from the deformation are repeated. For this reason, the elastic body 51 and the fluororesin film 52 are easily damaged, and there is a problem that maintenance takes time and cost.
Further, both edge portions of the elastic body 51 do not have a contact surface on the edge portion of the outer peripheral surface of the cylindrical rim 53 and are bonded to the side surface of the cylindrical rim 53 and the edge portion on the inner peripheral surface. For this reason, when the outer peripheral surface of the wheel is pressed against a farm scene, there is a problem that a peeling force is applied to the bonding site and the bonding is easily peeled off.

  In addition, the earthen wheel of Patent Document 2 requires a valve 77 attached to the cylindrical rim 72 or a covering portion 73 so as to prevent the filling material 74 from leaking. Therefore, there is a problem that costs are required.

In order to solve the above-mentioned problem,
A hard cylindrical rim and an elastic body covering the outer peripheral surface thereof,
The elastic body is formed on the entire circumference of one or two or more ridges extending in the circumferential direction formed at the center in the width direction of the inner peripheral surface and both edges of the inner peripheral surface, A pair of raised portions that rise so as to become thicker as they approach the center in the width direction, and an engaging portion that is formed so as to be engaged with the outer peripheral edge of the cylindrical rim together with the raised portion. And
The one or more ridges and the pair of raised portions abut each other on the widthwise central portion and both edges of the outer peripheral surface of the cylindrical rim, thereby forming a gap between the two. It is configured.

  Although it does not specifically limit as a material of the said elastic body, Rubber or resin is illustrated.

According to this configuration, the elastic body includes the pair of raised portions that abut on both edges of the outer peripheral surface of the cylindrical rim on the entire circumference of both edges of the inner peripheral surface. When both edge portions of the outer peripheral surface of the body are pressed against the field scene, it is pressed against the cylindrical rim and compressively deformed. There is nothing. For this reason, it is possible to prevent the elastic body from being damaged, and it is possible to reduce maintenance labor and cost.
Moreover, since the said elastic body is comprised so that the said space | gap may be formed between the said 1 or 2 or more protrusion and said pair of protruding part, the soil of a farm field adheres to the outer peripheral surface of this elastic body Even so, when the soil adhesion site in the elastic body is separated from the ground, it can be removed by deformation of the elastic body due to the presence of the gap.

Further, the elastic body is formed so that the engaging portion engages with the outer peripheral edge portion of the cylindrical rim together with the raised portion, and a wide contact area with the cylindrical rim can be ensured. Can be securely attached to the rim.
Further, at both edges of the elastic body, the raised portion contacts the edge of the outer peripheral surface of the cylindrical rim, and the engaging portion has a side surface of the cylindrical rim and an edge of the inner peripheral surface. It is the structure which contacts. If these contact parts are bonded, when the outer peripheral surface of the earthen wheel of the present invention is pressed against a field scene, a compressive force is applied particularly to the contact part of the raised portion, so that the bonding is more than conventional. Hard to peel off.

  According to the earthen wheel according to the present invention, the labor and cost of maintenance can be reduced, and the excellent effect of preventing the adhesion of soil on a farm scene can be achieved.

It is a perspective view which shows the principal part of the transplanter provided with the earthwork ring which concerns on one Embodiment which actualized this invention. It is a front sectional view of the earthen wheel attached to the transplanter. It is a principal part expanded end view of the earthen wheel. It is a figure explaining the effect | action of the same earthen wheel, (a) is the IVa arrow directional view of FIG. 2, (b) is the bb sectional view taken on the line of (a), (c) is c of (a). FIG. It is sectional drawing of the conventional wheel. It is a figure explaining the effect | action of the conventional earthen wheel, (a) is a side view of an earthen wheel, (b) is the bb sectional view taken on the line of (a), (c) is c- of (a). It is c line sectional drawing.

  1 to 4 show a dirt wheel in a transplanter according to an embodiment of the present invention. In each figure, an arrow F indicates the front side of the machine body. The transplanting machine 11 of this example is for planting a vegetable seedling P grown in a pot seedling box in a field H, as shown in FIG. A transport unit 14 that takes out the vegetable seedlings P horizontally from the pot seedling box and transports them one by one, and a planting unit 15 for sequentially planting the transported vegetable seedlings P in the field H are provided. And the planting part 15 forms the planting groove | channel 20 in the agricultural field H, and while planting the vegetable seedling P conveyed by the conveyance part 14 in this planting groove | channel 20, it is planted with a pair of left and right earthen wheels 1 The groove 20 is backfilled.

  As shown in FIGS. 2 to 4, the earthen wheel 1 includes a hard cylindrical rim 2 and an elastic body 3 that covers the outer peripheral surface thereof.

  In this example, the cylindrical rim 2 is made of iron as a metal. A plurality of spokes 8 extending toward the center of the cylindrical rim 2 are provided on the inner peripheral surface of the cylindrical rim 2 at intervals in the circumferential direction, and the tips of the plurality of spokes 8 are attached to the axle. The hubs 9 are connected to each other.

  The elastic body 3 is formed in the width direction center part of the inner peripheral surface thereof, and is formed in the width direction formed on the entire periphery of one edge 3a extending in the circumferential direction and both edges of the inner peripheral surface. A pair of raised portions 3b that rise so as to become thicker as they approach the center, and an engaging portion 3c that is formed to engage with the outer peripheral edge of the cylindrical rim 2 together with the raised portion 3b. ing. Then, a single protrusion 3a and a pair of raised portions 3b are brought into contact with the center and both edges in the width direction on the outer peripheral surface of the cylindrical rim 2 so that a gap 4 is formed between them. It is configured.

  The manufacturing method of the earthen wheel 1 will be described. First, an adhesive is applied to the inner surfaces of the raised portions 3b and the engaging portions 3c of the elastic body 3. At this time, an adhesive may also be applied to the contact surface of the protrusion 3a with the cylindrical rim 2. Next, the elastic body 3 is attached to the cylindrical rim 2. When the adhesive is cured to a practical strength and the elastic body 3 is fixed to the cylindrical rim 2, the process is completed.

According to the earthen wheel 1 of the present example configured as described above, the elastic body 3 is in contact with both edges of the outer peripheral surface of the cylindrical rim 2 on the entire circumference of both edges of the inner peripheral surface. 2b, when both edges of the outer peripheral surface of the elastic body 3 are pressed against a field scene, the cylindrical rim 2 is pressed against the cylindrical rim 2 to be compressed and deformed. There is no bending deformation at the corners of the outer peripheral edge of the cylindrical rim 2 (see FIG. 4B). For this reason, the elastic body 3 can be prevented from being damaged, and maintenance labor and cost can be reduced.
Moreover, since the elastic body 3 is comprised so that the space | gap 4 may be formed between the one protrusion 3a and a pair of protruding part 3b, the soil of the agricultural field H adheres to the outer peripheral surface of the elastic body 3. In addition, when the soil adhesion site on the elastic body 3 is separated from the ground, it can be removed by deformation of the elastic body 3 due to the presence of the gap 4 (see FIG. 4C).

Further, the elastic body 3 is formed so that the engaging portion 3c engages with the outer peripheral edge portion of the cylindrical rim 2 together with the raised portion 3b, so that a wide contact area with the cylindrical rim 2 can be secured. It can be securely attached to the rim 2.
Further, at both edge portions of the elastic body 3, the raised portions 3 b are in contact with the edge portions of the outer peripheral surface of the cylindrical rim 2, and the engaging portions 3 c are the edge portions on the side surface and the inner peripheral surface of the cylindrical rim 2. It is the structure which contacts. If these contact portions are bonded, a compressive force is applied to the contact portion of the raised portion 3b when the outer peripheral surface of the earthen wheel 1 is pressed against the field scene. Is less likely to peel off than the elastic body of the wheel).

In addition, this invention is not limited to the said embodiment, For example, it can also be suitably changed and embodied as follows, for example in the range which does not deviate from the meaning of invention.
(1) Use the earthen wheel 1 of this example for other agricultural machines such as a seeding machine.
(2) Change the material of the elastic body 3 as appropriate.
(3) Changing the shape and size of the protrusion 3a, the raised portion 3b, and the engaging portion 3c as appropriate.
(4) The number of the ridges 3a is set to 2 or more, and a gap is also formed between the ridges 3a.
(5) Filling the gap 4 with a filling material (for example, rubber, resin or foamed resin) having higher flexibility than the elastic body 3.

DESCRIPTION OF SYMBOLS 1 Soil ring 2 Cylindrical rim 3 Elastic body 3a Projection 3b Raised part 3c Engagement part 4 Space | gap 8 Spoke 9 Hub 11 Implanting machine 12 Machine body 14 Conveyance part 15 Planting part 20 Planting groove F Front side H Field P Vegetable Seedling

Claims (1)

A hard cylindrical rim and an elastic body covering the outer peripheral surface thereof,
The elastic body is formed on the entire circumference of one or two or more ridges extending in the circumferential direction formed at the center in the width direction of the inner peripheral surface and both edges of the inner peripheral surface, A pair of raised portions that rise so as to become thicker as they approach the center in the width direction, and an engaging portion that is formed so as to be engaged with the outer peripheral edge of the cylindrical rim together with the raised portion. And
The one or more ridges and the pair of raised portions abut each other on the widthwise central portion and both edges of the outer peripheral surface of the cylindrical rim, thereby forming a gap between the two. Constructed earthen wheel.

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