JP4717389B2 - Agricultural wheels - Google Patents

Description

  The present invention relates to agricultural wheels.

A typical agricultural wheel mounted on agricultural machinery that runs on soft ground, such as rice transplanters, is baked with rubber or other elastic material around a rim formed in a ring shape with a steel round pipe. It has the formed elastic ring body.
There are various types of agricultural wheels. For example, some rims use pipe materials other than round pipes, and the outer periphery of a donut plate-shaped iron core is pressed into an L-shaped cross section. And the like, and an elastic material is adhered (rubber baked or the like) around the bent portion. In addition, a spoke-type foil portion having a plurality of spokes is provided on the inner peripheral side of a ring-shaped rim or donut plate-shaped core material (hereinafter collectively referred to as “core material”), Alternatively, a disk-type foil portion such as a circle, a rectangle, or a triangle is provided.

In such an agricultural wheel, when an elastic material is originally attached to the core material, an adhesive is applied to the core material in advance to generate a strong bonding force between the core material and the elastic material. It was.
However, since this makes it difficult to separate the agricultural wheels when they are disposed of, as a technique for solving this problem, no adhesive is used. After being wrapped, the inner circumferential side is overlapped, and a pair of left and right flange-shaped portions are formed so as to project from the inner circumferential direction. A structure has been proposed in which sandwiched plates are sandwiched between a pair of sandwiched plates and these are fastened in a skewered manner with bolts and nuts (see Patent Document 1).
JP 2002-46407 A

  If it is an agricultural wheel provided with the countermeasure structure (patent document 1) concerning the conventional proposal, the core part and the elastic material can be easily disassembled by loosening and loosening the bolt and nut at the time of disposal. It was certainly excellent in that respect. However, since many bolts and nuts are used in addition to the clamping plate, the number of parts may increase. In addition, there was a problem that the assembly and disassembly of agricultural wheels would be troublesome.

  The present invention has been made in view of the above circumstances, and while reducing the number of parts while ensuring the ease of separation at the time of disposal, prevents assembly and disassembly from becoming troublesome, and reduces the cost. An object is to provide agricultural wheels that can be made.

In order to achieve the above object, the present invention has taken the following measures.
That is, the agricultural wheel according to the present invention includes a ring-shaped core portion and a plurality of spokes extending from the core portion toward the center portion of the ring shape, and an elastic covering material ( 2) around the core portion (2). In the agricultural wheel having the elastic ring body (4) to which 3) is attached, the core portion is a radial protrusion protruding radially outward of the ring shape or a radially deformed portion sinking radially inward. And at least one of a ring-shaped protrusion protruding outward in the width direction of the ring shape or a width-shaped deformed portion sinking inward in the width direction, and the core portion and the elastic covering material are adhesives The elastic covering material is fixed to the inside of the core portion by using the vulcanization adhesion without using the radial projection receiving portion or the radial projection receiving portion which meshes with the radial projection according to the shape of the core portion. Convex radial projections that mesh with radial irregularities A convex widthwise protrusions meshing with the lateral projections and meshing lateral projections receiving or the width direction profile portion, at least one is formed, and by the elastic covering material, around the base portion of the spoke A build-up portion is formed so as to surround the padding portion, and the build-up portion is pressed against the spoke by a fastening member .

  Here, the meaning of “in accordance with the form of the core part” as to the elastic covering material is that, when the core part includes a radial protrusion or a radially deformed part, the elastic covering material engages with the radial protrusion in the radial direction. In the case where the projection is provided with a radial protrusion that meshes with the projection receiving portion or the radially deformed portion, and the core portion includes the widthwise projection or the width deformed portion, the elastic covering material is a widthwise projection receiving portion that engages with the widthwise projection or A width-direction convex portion that meshes with the width-direction deformed portion is provided. When the core portion includes a radial protrusion or a radially deformed portion and a widthwise protrusion or a width-shaped deformed portion, the elastic covering material includes a radial protrusion receiving portion or a radially protruding portion and a widthwise protrusion receiving portion or A width direction convex portion.

With such a configuration, when the agricultural wheel is discarded, the core portion and the elastic covering material can be easily disassembled, and bolts and nuts are not used for the connection between the core portion and the elastic covering material. Therefore, an increase in the number of parts can be suppressed. Therefore, assembly and disassembly are not troublesome, and cost can be reduced.
As for the core portion being ring-shaped, for example, a circular plate is used, and only the outer peripheral portion (annular region) is used as the core portion (the inside of the annular region is used as a disk for the foil portion). In some cases, there is no limitation on whether the ring shape is integral or separate (independent).

The core portion can be formed by a round pipe, but a ring-shaped radial cross-sectional shape formed by bending from a plate material may be adopted. In this case, the protrusions may be formed by deformed portions that are additionally generated as the plate material is bent. As a result, welding or the like is not necessary for the production of the core part and the protrusion, which is easy.
A plurality of the widthwise protrusions are provided at intervals in the circumferential direction on both sides in the width direction of the core portion, and the positions differing in the circumferential direction so that the widthwise protrusions on both sides of the width direction are staggered. May be arranged.

  A plurality of radial projections are provided with an interval in the circumferential direction of the core portion, and a plurality of the width direction projections are provided with an interval in the circumferential direction on both sides in the width direction of the core portion. The radial protrusion and the width protrusion may be arranged at different positions in the circumferential direction.

  With the agricultural wheel according to the present invention, the number of parts can be reduced while ensuring the ease of separation at the time of disposal. Therefore, assembly and disassembly are not troublesome and cost can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of an agricultural wheel according to the present invention. This agricultural wheel 1 has an elastic ring body 4 formed by attaching an elastic covering material 3 around a core portion 2 having a ring shape. In the illustrated example, the core portion 2 is formed of a metal round pipe, and the elastic covering material 3 is made of rubber or the like and is attached to the core portion 2 by baking.

  The elastic ring body 4 is provided with a plurality of spokes 5 extending from the core portion 2 toward the center of the ring shape, and the tips of the spokes 5 are directed to the ring-shaped center portion of the core portion 2. A boss 6 is provided in this portion in a concentrated manner, and the elastic ring body 4 is attached to the axle of the agricultural machine via the boss 6. The spoke 5 may be replaced with a circular, triangular, or quadrangular disk.

On the outer peripheral surface of the elastic covering material 3, lugs 7 are provided at a plurality of positions spaced apart from each other in the circumferential direction, and triangular lugs 8 projecting to the sides are provided on every predetermined number of lugs 7. Yes.
The core portion 2 and the elastic covering material 3 are integrally formed with a coupling force governed by the mechanical engagement means 10. The mechanical engagement means 10 includes projections 11 and 12 provided on the outer peripheral surface of the core portion 2, and the elastic coating material 3 side formed as a recess corresponding to the projections 11 and 12 inside the elastic coating material 3. It is formed by meshing with the projection receiving portions 13 and 14.

In the core part 2, one protrusion 11 protrudes radially outward in the ring shape of the core part 2. The other protrusion 12 protrudes outward in the width direction with respect to the core portion 2. These protrusions 11 and 12 are fixed to the core portion 2 by welding.
The protrusions 12 in the width direction can be provided in a zigzag arrangement on the left and right in the circumferential direction of the core portion 2 as shown in FIG. Further, the radial projection 11 and the width projection 12 are provided at the same position along the circumferential direction of the core 2 as shown in FIG. 4, or in the circumferential direction of the core 2 as shown in FIG. A staggered arrangement can be provided.

Each of the protrusions 11 and 12 is chamfered at a corner that is generated along the circumferential direction of the core 2. In the example shown in the figure, it is round chamfering, but it may be straight chamfering. Note that chamfering is not necessarily required.
The protrusion receiving portions 13 and 14 provided on the elastic covering material 3 side with respect to the protrusions 11 and 12 are the process of attaching the elastic covering material 3 to the core portion 2 (rubber pasting or vulcanizing step). Thus, the elastic material adheres around the protrusions 11 and 12 and is automatically and reversibly formed into a protrusion shape. Therefore, it is not particularly necessary to produce the projection receiving portions 13 and 14, and the formed projection receiving portions 13 and 14 are in close contact with each of the projections 11 and 12 without any gaps or rattling. .

  Such a close contact state between the projections 11 and 12 and the projection receiving portions 13 and 14 forms the mechanical engagement means 10, and the mechanical engagement means 10 makes it possible to elastically cover the core portion 2. The rotational deviation of the material 3 and the positional deviation of the elastic covering material 3 along the circumferential direction of the core 2 are prevented. That is, the coupling force between the core portion 2 and the elastic coating material 3 is sufficient by the mechanical engagement means 10. Other than this coupling force, the core portion 2 and the elastic coating material 3 are both bonded to each other. It is not necessary to apply the agent.

On the other hand, in the agricultural wheel 1 having such a configuration, the core portion 2 and the elastic coating material 3 are not chemically bonded by an adhesive, so that the elastic coating material 3 is dissolved, crushed and pulverized at the time of disposal. Needless to say, the core portion 2 and the elastic covering material 3 can be easily disassembled by incision or the like.
As shown in FIGS. 6 and 7, the widthwise protrusion 12 and the radial protrusion 11 provided on the core 2 can be formed in a continuous rib shape along the circumferential direction of the core 2.

Moreover, as shown to Fig.8 (a)-(i), you may make it form the core part 2 using the board | substrate raw materials 20-37 bend | folded variously single or in combination. These plate materials 20 to 37 are bent so that the cross-sectional shape along the radial direction in the ring shape exhibited by the core portion 2 swells in the width direction, and arc shapes (semicircle, quarter circle, etc.) ) Or L shape.
The plate materials 20 to 37 themselves may be formed corresponding to the ring shape of the core 2, or the plate materials 20 to 37 are formed as a disc shape and have an outer periphery. Only the portion (region exhibiting the ring shape) may be bent as described above (the radially inner side of the region exhibiting the ring shape may be formed as a foil portion (disk) as the agricultural wheel 1).

When such a core part 2 is employed, as shown in FIGS. 8A to 8C, the protrusions 11 and 12 may be bonded to another member by welding or the like, and FIGS. As shown in FIG. 9, a convex-type deformed portion 20 may be additionally generated at the time of bending when the cross-sectional shape is formed, and the protrusions 11 and 12 may be formed by the deformed portion 20.
Further, as shown in FIGS. 8 (h) and (i), a concave-type deformed portion 21 is additionally generated, and the protrusions 11, 12 are formed by convex portions that appear relatively on the peripheral portion of the deformed portion 21. You may do it.

By adopting these deformed portions 20 and 21, welding or the like is not necessary for manufacturing the core portion 2 and the protrusions 11 and 12, which is easy.
As shown in FIG. 9, when the spokes 5 are provided toward the inside in the radial direction of the core portion 2, the root portions of these spokes 5 penetrate the elastic coating material 3. Therefore, a built-up portion 40 is formed on the elastic covering material 3 so as to surround the base portion of the spoke 5, and the built-up portion 40 is fastened by a fastening member 41 such as a band, and the spoke 5 You may make it crimp on.

Thereby, since a foreign material, muddy water, etc. do not penetrate | invade from between the spoke 5 and the build-up part 40, the core part 2 and the elastic coating | covering material 3 will peel during use as the agricultural wheel 1. Can be prevented.
By the way, this invention is not limited to each above-mentioned embodiment, It can change suitably according to embodiment.

For example, only one of the radial protrusion 11 and the widthwise protrusion 12 may be used. One or a plurality of protrusions may be provided between the radial protrusions 11 and the widthwise protrusions 12.
It is not limited whether the elastic ring body 4 is integral with or separate from the spoke type or disk type foil portion.

It is the side view which crushed and showed 1st Embodiment of the agricultural wheel which concerns on this invention. It is an AA arrow line view of FIG. It is a BB arrow directional cross-sectional view of FIG. It is the side view which showed an example of the positional relationship of radial direction protrusion and the width direction protrusion in a core part. FIG. 5 is a side view showing an example of a positional relationship between a radial protrusion and a width protrusion in a core portion (an example different from FIG. 4). It is CC sectional view taken on the line of FIG. It is the side view which showed the example which each protrusion of radial direction and the width direction continued in the circumferential direction in the core part. It is sectional drawing which showed the various modifications of the core part formed with the board | plate material. It is the side view which showed another embodiment using a fastening member.

DESCRIPTION OF SYMBOLS 1 Agricultural wheel 2 Core part 3 Elastic covering material 4 Elastic ring
5 Spoke 11 Protrusion (radial protrusion)
12 Protrusion (width direction protrusion)
13 Protrusion receiving part (radial protrusion receiving part)
14 Projection receiving part (width direction projection receiving part)
21 Deformed section (Diameter-shaped deformed section, Width-shaped deformed section)
40 meat overlay
41 Tightening member

Claims (3)

A ring-shaped core (2) and a plurality of spokes (5) extending from the core (2) toward the center of the ring-shaped core are provided around the core (2) to provide an elastic covering material (3 In the agricultural wheel having the elastic ring body (4) to which
The core (2)
A radial protrusion (11) protruding radially outward of the ring shape or a radially deformed portion (21) sinking radially inward;
And at least one of a widthwise protrusion (12) protruding outward in the widthwise direction of the ring shape or a widthwise deformed portion (21) sinking inwardly in the widthwise direction,
The core portion (2) and the elastic covering material (3) are fixed by vulcanization adhesion without using an adhesive,
According to the form of the core (2), the elastic covering material (3) is arranged inside the core (2).
A radial projection receiving portion (13) that meshes with the radial projection (11) or a convex radial projection that meshes with the radially deformed portion (21);
At least one of a widthwise protrusion receiving portion (14) that meshes with the widthwise projection (12) or a convex widthwise convex portion that meshes with the widthwise deformed portion (21) is formed ,
And by the said elastic coating | covering material (3), a build-up part (40) is formed so that the surroundings of the root part of the said spoke (5) may be surrounded,
Agricultural wheel, wherein the build-up portion (40) is pressure-bonded to the spoke (5) by a fastening member (41) . The widthwise protrusion (12) is
In any of both sides in the width direction of the core portion (2), a plurality are provided with an interval in the circumferential direction,
The agricultural wheel according to claim 1, wherein the widthwise protrusions (12) on both sides in the widthwise direction are arranged at different positions in the circumferential direction so as to form a staggered arrangement. The radial protrusion (11) is
A plurality of the core portions (2) are provided at intervals in the circumferential direction,
The widthwise protrusion (12) is
In any of both sides in the width direction of the core portion (2), a plurality are provided with an interval in the circumferential direction,
The agricultural wheel according to claim 1, wherein the radial protrusion (11) and the width protrusion (12) are arranged at different positions in the circumferential direction.

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