JP2004267164A - Rotary tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary tiller that is equipped with plates for inhibiting soil after tillage, from sticking to covers on the upper and rear parts of a rotory tillar part. <P>SOLUTION: In this rotaty tiller 1, the rotor tiller part is covered with the main cover 12 on the upper part and additionally with the rear cover 13 on the rear part. Plates 14, 15 that are made of a hard thermoplastic resin, e.g., polypropylene and can inhibit the tilled soil from sticking are lined on the inner surface of the main cover 12 or that of the rear cover or on those of the both covers. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotary tilling device having a soil adhesion prevention plate for preventing soil after tilling from being attached to a cover that covers the upper and rear sides of a rotary tilling unit.
[0002]
[Prior Art and Problems to be Solved by the Invention]
Conventionally, a rotary tilling device is attached to a tractor to cultivate the field.At this time, the inner surface of the cover that covers the upper and rear parts of the rotary tilling part is painted and smooth, so mud etc. adhere during tilling. Hateful. However, if the cover is used for a long time, the inner surface of the cover is peeled off by the impact of the soil after being plowed. And if the paint is peeled off, the surface of the metal, which is the material of the cover itself, is exposed and rust is generated, so that the metal surface becomes rough. There is a problem that the work of removing mud or the like adhering to the inner surface of the rotary cover after the tilling work is very troublesome after the tilling work is completed.
Further, when mud or the like adheres to the inner surface of the rotary cover during tillage, the weight of the rotary tillage device increases, the horsepower loss of the tractor pulling the rotary tillage device increases, and the workability deteriorates.
[0003]
Therefore, an elastic body made of rubber or the like that forms a space capable of vibrating due to the impact of the soil is attached to the inner surface of the rotary cover that covers the tilling part via a spring member, so that the soil that has been repelled by the tilling claws of the rotary tilling part When the elastic body hits the elastic body, the elastic body is deformed toward the inner side of the space against the elastic force of the spring member due to the impact at that time, and then the elastic body is restored by the elastic force of the elastic body itself and the elastic force of the spring member. Restore to the shape of In this way, the elastic body prevents the cultivated soil from attaching due to the vibration generated by the repetition of elastic deformation using the elastic force of the spring member (for example, see Patent Literature 1), and covers the tilling portion. There has been proposed a configuration in which a rubber plate is attached to the inner surface of a rotary cover to prevent soil cultivated from attaching due to vibration generated by the elastic force of the rubber plate itself (for example, see Patent Document 2).
However, the elastic body made of rubber or the like in Patent Document 1 forms a space that can vibrate due to the impact of soil and is attached to the rotary cover via a spring member that urges the elastic body in a direction to restore the elastic body. There is a problem that the cost increases due to the complexity and the provision of the spring member.
Further, since the rubber plate attached to the inner surface of the rotary cover as in Patent Document 2 may be broken by mud or stones during tilling if the thickness is small, it is necessary to increase the thickness of the rubber plate. In such a case, the cost of the rubber plate increases, and if the thickness is large, the weight becomes heavy and the rubber plate itself needs to be attached to the inner surface of the rotary cover without increasing the number of mounting points on the cover. There has been a problem that the rubber plate may fall off the cover and hang down due to the weight, and may come into contact with the rotating tilling nail.
[0004]
Also, by attaching a synthetic resin soil-prevention member such as Teflon (registered trademark) having a smooth surface to the inner surface of the rotary cover, soil repelled by the tilling claws of the rotary tilling portion adheres to the inner surface of the rotary cover. There is a proposal that prevents such a situation (see, for example, Patent Document 3).
In this case, the weight of Teflon (registered trademark) is heavy, and it is necessary to increase the number of mounting points in order to mount it on the inner surface of the rotary cover, and the cost is higher than other synthetic resins. There was a problem that it was not suitable for practical use.
[0005]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 2-9006 [Patent Document 2]
Japanese Patent No. 3325386 [Patent Document 3]
Japanese Utility Model Publication No. 49-144713
[Means for Solving the Problems]
The rotary tillage device of the present invention for solving the above problems is a rotary tillage device that covers the upper part of the rotary tillage with a main cover, and covers the rear of the rotary tillage with a rear cover, wherein the inner surface of the main cover or It is characterized in that a soil adhesion prevention plate made of a hard thermoplastic resin made of polypropylene or the like is attached to one or both of the inner surfaces of the rear cover.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and 2 are a side view and a rear view of a rotary tillage device 1 according to the present invention. The rotary tilling device 1 is connected to a tractor 2 and is a conventionally known device that performs tilling work on a field as the tractor 2 travels. A pipe frame 5 protrudes left and right, a chain case 7 is integrally attached to one (left) outer end of the pipe frame 5, and a side frame 8 is integrally attached to the other (right) outer end. ing.
[0008]
The chain case 7 and the side frame 8 are both extended downward, and a claw shaft 9 is rotatably supported between the chain case 7 and the lower portion of the side frame 8 as in the related art. A plurality of tilling claws 10 for performing tilling work in a field are attached to the claw shaft 9, and the claw shaft 9, the cultivating claw 10, and the like constitute a rotary tilling unit.
[0009]
With the above structure, the driving force input to the gear case 4 is input to the claw shaft 9 via the chain case 7, and the claw shaft 9 is driven to rotate in the downcut direction, so that the rotary tilling unit (tiling claw 10) tills the field. Do the work. A top mast 11 is attached to the upper part of the gear case 4, and the front end of the top mast 11 is one of the connection points between the rotary tilling device 1 and the tractor as in the conventional case.
[0010]
The rotary tilling portion is covered on the upper side by a main cover 12 provided between the chain case 7 and the side frame 8 and on the rear side by a rear cover 13 rotatably arranged behind the main cover 12. I have.
[0011]
The main cover 12 is formed of a substantially arc-shaped plate. The front portion of the main cover 12 is bent upward in an L-shape 12a in a side view, and the rear portion has a stepped plate 12b on the lower surface of the main cover 12. The lower surface of the main cover 12 is formed into a bag shape by welding. An L-shaped plate 12c with a nut welded to the rear surface is welded on the L-shaped plate 12a bent at the front of the main cover 12.
Therefore, the point of attaching the soil adhesion preventing plate 14 formed using a hard thermoplastic resin made of polypropylene or the like, which is the gist of the present invention, to the inner surface of the main cover 12 will be described.
Generally, polypropylene is lighter in weight than synthetic resins such as Teflon (registered trademark) and rubber, and is characterized by being cheaper to purchase.
First, one end of the soil adhesion preventing plate 14 is inserted into a bag-shaped space formed by the rear portion of the main cover 12 and the stepped plate 12b. Next, the other end of the soil adhesion preventing plate 14 is brought along the inner surface of the main cover 12 to the front portion of the main cover 12, and finally the V-shaped plate 12e is moved from below the front of the soil adhesion preventing plate 14 to the bottom. The soil adhesion preventing plate 14 is attached to the entire inner surface of the main cover 12 by bolts 12d while being sandwiched between the L-shaped plates 12c.
[0012]
Also, as shown in FIGS. 3 and 4, one end of the soil adhesion preventing plate 15 made of a hard thermoplastic resin made of polypropylene or the like is attached to the rear cover 13 near the rotation fulcrum 13a of the rear cover 13 as shown in FIGS. Are sandwiched between plates 13b and 13c formed in a Y-shape.
A protrusion 15a is formed in the middle of the soil adhesion preventing plate 15, and is attached to the inner surface of the rear cover 13 by a fastener 15b via the protrusion 15a.
[0013]
As described above, the soil-adhesion preventing plates 14 and 15 formed of a hard thermoplastic resin made of a smooth surface such as polypropylene are attached to the inner surface of the main cover 12 and the inner surface of the rear cover 13. Adhesion of mud or the like to the inner surface 12 of the main cover and the inner surface of the rear cover 13 during the tilling operation can be minimized. Therefore, it is possible to prevent the weight of the rotary tilling device from increasing due to mud or the like attached to the inner surface of the cover, and to prevent the tractor pulling the rotary tilling device from losing horsepower and impairing workability. . Further, after the tilling operation is completed, the operation of removing mud or the like adhering to the inner surface of the main cover 12 and the inner surface of the rear cover 13 can be easily performed.
In addition, since the weight of the polypropylene itself is lighter than that of synthetic resin such as Teflon (registered trademark) or rubber, it can be easily attached to the inner surface of the main cover 12 and the inner surface of the rear cover 13.
A hard thermoplastic resin made of polypropylene or the like has an advantage that it can be purchased at a lower cost than a synthetic resin such as Teflon (registered trademark) or rubber.
[0014]
【The invention's effect】
The present invention is, as described above, a rotary tilling device that covers the upper part of a rotary tilling part with a main cover, and covers the rear of the rotary tilling part with a rear cover, wherein either the inner surface of the main cover or the inner surface of the rear cover or By attaching a hard soil-prevention plate made of thermoplastic resin made of polypropylene or the like to both inner surfaces, mud etc. adheres to the inner surface of the main cover and the inner surface of the rear cover during tilling work. It can be reduced as much as possible. Therefore, it is possible to prevent the weight of the rotary tilling device from increasing due to mud or the like attached to the inner surface of the cover, and to prevent the tractor pulling the rotary tilling device from losing horsepower and impairing workability. . Further, after the tilling operation is completed, the operation of dropping mud or the like adhering to the inner surface of the main cover and the inner surface of the rear cover can be easily performed.
Further, since the weight of the polypropylene itself is lighter than that of synthetic resin such as Teflon (registered trademark) or rubber, it can be easily attached to the inner surface of the cover.
A hard thermoplastic resin made of polypropylene or the like has an advantage that the cost is lower than a synthetic resin such as Teflon (registered trademark) or rubber.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a rotary tilling device of the present invention is mounted on a tractor.
FIG. 2 is a rear view showing the configuration of the rotary tillage device of FIG.
FIG. 3 is a plan view showing a state in which a soil adhesion preventing plate made of polypropylene or the like is attached to a rear cover.
FIG. 4 is a side view showing a state where a soil adhesion preventing plate made of polypropylene or the like is attached to a rear cover.
[Explanation of symbols]
12 Main cover 13 Rear cover 14 Soil adhesion prevention plate 15 Soil adhesion prevention plate

Claims (1)

A rotary tilling device that covers an upper part of a rotary tilling part with a main cover, and covers a rear part of the rotary tilling part with a rear cover. A rotary tilling device, comprising a soil-adhesion preventing plate formed by using a hard and thermoplastic resin.

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