JP2818810B2 - Rotary type agricultural machine cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cover for preventing adhesion of mud used in agricultural machines such as a rotary cultivator and a scraper.

[Conventional technology]

2. Description of the Related Art As an agricultural machine that performs farming work such as tilling or scraping, a rotary type that mounts a number of tilling claws around a shaft of a tilling shaft and rotates the tilling shaft with power transmitted from an engine is known.

For example, the present applicant has also developed an up-cut type cultivator having a structure shown in FIG. 3 as a kind of the rotary type, and applied for the application as Japanese Utility Model Application No. 62-137316.

The tillage device 1 has a top mast 2 and a lower link connecting portion 3 mounted on a three-point link hitch mechanism protruding forward from a work machine main body 4, and an input shaft 5 extending forward from a transmission case of the work machine main body 4. , And rotational power is transmitted to the input shaft 5 from the PTO shaft of the tractor.

On the work machine main body 4, a tillage shaft 6 is mounted horizontally.
A cultivating rotor 8 is provided around the shaft of the cultivating shaft 6 and is equipped with a number of up-cut tilling claws 7 having a rake face formed on a horizontal blade 7a, and the power received by the input shaft 5 is up-cut via a transmission system. It rotates in the direction.

A shield cover 9 is provided from the upper part of the tilling rotor 8 to the front, and a front reinforcing cover 10 is provided outside the lower end of the shield cover 9. A bulging portion 11 bulging upward is formed at a rear end portion of the shield cover 9, and a rubber cover supporting member made of a comb-like elastic material is provided here.
12 is supported, and the rubber cover 13 is
Is supported. Also, the apron mounting seat 14 so that the rubber cover support 12 and the lower portion of the rubber cover 13 overlap.
The apron 15 is rotatably supported via.

Further, in the space between the rubber cover support member 12 and the tilling rotor 8 in the bulging portion 11, a support shaft 16a at the front end of the rake body 16 is provided.
Are provided so as to be adjustable in the vertical direction. The rotation adjustment of the rake body 16 is performed by a rake adjustment mechanism 18 provided on a frame pipe 17 extending laterally from the work machine body 4.
The rotation angle of the rake body 16 can be adjusted steplessly around the support shaft 16a.

The rake adjustment mechanism 18 projects the other end of the rotating arm 16b having one end fixed to the support shaft 16a upward from the front of the support member 12 and the rubber cover 13, and the rear end of the screw moving section 19 at the protruding end. A pivot handle 20 is attached to the tip of a screw moving section 19 for pivotal support. The rotating handle 20 can be operated by the worker riding the tractor facing backward in a state where the rotary tilling device 1 is lifted by the tractor.

The mounting seats 14 of the apron 15 are selectively mounted in mounting holes 22 provided in three upper and lower stages at rear ends of side covers 21 provided on the left and right sides of the tilling rotor 8. The pivot height of this apron 15, that is, the mounting seat
Adjustment of the mounting position of the 14 with respect to the mounting hole 22 is performed together with adjustment of the plowing depth and angle adjustment by the rake adjusting mechanism 18 of the rake body 16.

[Problems to be solved by the invention]

In this type of rotary agricultural machine, mud and soil are remarkably adhered to the shield cover 12, the apron 15, the side cover 21, and the like. The attached mud or soil, for example, in the shield cover 12, accumulates in the space between the tip of the tilling claw 7 and hinders the rotation of the tilling shaft 6. In addition, mud and soil attached to the apron 15 inhibit the apron 15's original leveling action,
Decreases the finish of tillage work and scraping work.

Therefore, the mud or soil attached to the shield cover 12, the apron 15, the side cover 21, and the like (in the specification of the present application, these are collectively referred to as covers, in the specification of the present application) (Similarly referred to as mud). However, it adheres to the cover
The accumulated mud has a large adhesive force to the cover, and a great deal of labor and time is consumed in the mud removing operation.

In order to suppress or prevent this adhesion of mud, there are some methods such as applying vibration to the cover to drop the adhering mud, or changing the surface of the iron plate, which is the material of the cover, to a material with less adhesion and accumulation of mud. Proposed. However, even with these methods, a sufficient effect for preventing adhesion of mud has not been obtained.

Therefore, the present invention promotes the formation of a water film on the surface of the cover by maintaining the cover at a positive potential, suppresses the adhesion of mud, and makes the attached mud easily detach from the cover. An object of the present invention is to provide a cover for a rotary agricultural machine.

[Means for solving the problem]

In order to achieve the object, the present invention provides a cover arranged on a part of a cultivating rotor having a plurality of cultivating claws mounted on a circumference of a cultivating shaft erected in a horizontal direction, which is disposed on a part of a circumferentially outer side of the cultivating rotor. And a means for applying a voltage between the cover and the electrode so that the cover is maintained at a positive potential.

(Operation)

In the rotary agricultural machine to which the present invention is applied,
Cover is maintained at a positive potential. It is presumed that the mud adhesion is suppressed by this potential for the following reasons. That is, cations such as potassium ions and sodium ions contained in the soil move toward the electrode, and an atmosphere having a high concentration of these cations is formed around the electrode. When the concentration of these cations exceeds a predetermined value, it absorbs water in the soil and changes to hydroxide. This hydroxide further absorbs the moisture contained in the soil. As a result, the soil dries on the cover side.

Dry soil has less adhesion to the cover surface and will spontaneously separate from the cover surface. As a result, adhesion and accumulation of mud on the cover are eliminated.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the cover for a rotary agricultural machine of this embodiment has an electrode C attached to a cover body A via an insulator B. Then, a voltage of about several volts to several tens of volts is applied from the power supply D between the cover body A and the electrode C, and the cover body A is maintained at a positive potential.

The electrode C is at an interval where voltage application is effective (for example, 70 mm)
Are attached to the cover body A. Further, as the insulator B, it is preferable to use a material having resistance to mud adhesion, for example, a synthetic resin having a smooth surface.

In this manner, when a voltage is applied between the cover A and the electrode C, potassium ions, sodium ions, calcium ions, etc. contained in the soil migrate to the vicinity of the electrode C as shown in FIG. An atmosphere having a high cation concentration is formed. This atmosphere having a high cation concentration has strong water absorption and absorbs moisture in the soil. On the other hand, the earth mass E around the cover A is in a dehydrated dry state F.

Due to the drying of the earth mass E, the adhesive force to the cover A is reduced. Then, the earth mass E with reduced adhesion is
Peel off from the surface of the cover A so that it falls off.

For example, on the surface of a steel plate 20 cm wide and 1 m long,
A cover with a plurality of electrodes C having a thickness of 0 mm was prepared. After attaching an earthen mass E having an average thickness of 3 cm to the cover A, a voltage of 12 volts was applied between the cover A and the electrode C. In this state, the cover A was dragged while making contact with the soil surface.

After one hour, the state of the earth mass E adhering to the cover A was measured. As a result, mud having an average thickness of 1.0 cm, which was smaller than the mud adhesion state before the test, was adhering. In contrast, when no voltage was applied, the mud adhesion thickness after testing under similar conditions reached 10 cm.

Then, when the cover A to which the electrode C was attached was attached to an actual tilling machine and used for actual farming, it was necessary to remove the clod E attached to the cover A every two hours in the past. Average thickness after one day use
The soil mass E of 1.5 cm or less remained. Further, since the adhesive force of the earth mass E to the cover A is small, the earth mass E adhered could be removed from the cover A by a simple operation.

(Effects of the Invention) As described above, in the present invention, by keeping the cover at a positive potential, the adhesion of mud, which has conventionally adhered to the cover and hindered the movement of the tilling shaft or the like, is suppressed. In addition, it is possible to use the agricultural machine with good workability.
In addition, since the attached mud has a small adhesive force to the cover, the mud can be removed from the cover by a simple operation,
The agricultural machine can always be kept in good condition.

[Brief description of the drawings]

FIG. 1 shows a main part of a cover in an embodiment of the present invention, FIG. 2 is a view for explaining a situation in which mud adhesion is suppressed using the cover, and FIG. 3 is an up-cut type. 1 shows a tillage device. A: cover, B: insulator, C: electrode, D: power supply, E: earth mass, F: dry soil.

Claims (1)

(57) [Claims] 1. A cover disposed on a part of a cultivating rotor having a plurality of cultivating claws mounted on a circumference of a cultivating shaft erected in a horizontal direction on a part of a circumferentially outer side of the cultivating rotor. A cover for a rotary agricultural machine, comprising means for mounting an electrode and applying a voltage between the cover and the electrode so that the cover is maintained at a positive potential.