JP2021101617A - Agricultural implement - Google Patents

Abstract

To provide an agricultural implement capable of preventing soil intrusion.SOLUTION: An agricultural implement 11 includes a tillage body 13 for performing a tillage work, and a ground leveling body 14 for performing a ground leveling work. The agricultural implement 11 further includes a rubber cover plate 51 for covering a surface on the tillage body 13 side of the ground leveling body 14, and a presser plate 52 for preventing soil intrusion between the ground leveling body 14 and the rubber cover plate 51. The presser plate 52 prevents soil intrusion between the ground leveling body 14 and the rubber cover plate 51 by supporting a side end part of the rubber cover plate 51 from below.SELECTED DRAWING: Figure 1

Description

The present invention relates to an agricultural work machine capable of preventing the invasion of soil.

Conventionally, for example, the agricultural work machine described in Patent Document 1 below is known.

This conventional agricultural work machine includes a tiller that performs tillage work, a ground leveler that performs ground leveling work behind the tiller, and an elastic body (rubber cover plate) that covers the upper part of the surface of the ground leveler on the tiller side. It is provided with a soil adhesion preventive body (stainless plate) that covers the lower part of the surface of the ground leveling body on the tiller side, and a common fixing means for fixing these elastic bodies and the soil adhesion prevention body to the ground leveling body.

Japanese Unexamined Patent Publication No. 2016-163563

However, in the conventional agricultural work machine, for example, the elastic body bends due to its own weight, and as a result, a large amount of soil 3 may invade between the ground leveling body 1 and the elastic body 2 as shown in FIG.

The present invention has been made in view of such a point, and an object of the present invention is to provide an agricultural work machine capable of preventing the invasion of soil.

The agricultural work machine according to claim 1 includes a cultivated body for cultivating work, a ground leveling body for laying the ground behind the cultivated body, an elastic body covering the surface of the cultivated body on the cultivated body side, and the ground leveling body. It is provided with a soil intrusion prevention body that prevents soil from entering between the elastic body and the elastic body.

The agricultural work machine according to claim 2 is the agricultural work machine according to claim 1. In the agricultural work machine according to claim 1, the soil intrusion prevention body supports at least a side end portion of the elastic body, so that soil invades between the ground leveling body and the elastic body. It prevents you from doing so.

The agricultural work machine according to claim 3 is the agricultural work machine according to claim 1 or 2, and the soil intrusion prevention body is provided only on the left and right side ends of the ground leveling body.

The agricultural work machine according to claim 4 is the agricultural work machine according to any one of claims 1 to 3, wherein the soil intrusion prevention body is formed in an elongated plate shape.

The agricultural work machine according to claim 5 is the agricultural work machine according to any one of claims 1 to 4, wherein the soil intrusion prevention body is bent so as to correspond to the ground leveling body.

According to the present invention, it is possible to prevent soil from entering between the ground leveling body and the elastic body.

It is a side view of the agricultural work machine which concerns on 1st Embodiment of this invention. Same as above. It is a plan view of an agricultural work machine. It is a figure which shows the ground leveling body of the agricultural work machine, (a) is a side view, and (b) is a plan view. FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a cross-sectional view taken along the line BB in FIG. It is a figure which shows the soil invasion prevention body (pressing plate) of the agricultural work machine, (a) is a side view, and (b) is a plan view. It is a figure which shows the ground leveling body of the agricultural work machine which concerns on 2nd Embodiment of this invention, (a) is a side view, (b) is a plan view. It is a figure which shows the ground leveling body of the agricultural work machine which concerns on 3rd Embodiment of this invention, (a) is a side view, (b) is a plan view. It is sectional drawing of the ground leveling body of the agricultural work machine which concerns on 4th Embodiment of this invention. It is sectional drawing of the ground leveling body of the agricultural work machine which concerns on 5th Embodiment of this invention. It is sectional drawing of the ground leveling body of the conventional agricultural work machine.

The first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

Reference numeral 11 in the figure is an agricultural work machine. For example, the agricultural work machine 11 is connected to the rear part of a tractor (not shown), which is a traveling vehicle, and the tractor travels to move the field forward in the direction of travel while cultivating land. It is a rotary cultivator that performs work (farming work).

The agricultural work machine 11 includes a machine body 12 that is detachably connected to a three-point link at the rear of the tractor, and a tiller body (rotary) 13 that is rotatably provided on the machine body 12 and performs tillage work while rotating in a predetermined direction. , The machine body 12 is provided so as to be rotatable in the vertical direction, and is provided with a ground leveling body (flat plate) 14 for leveling work behind the tillage body 13.

The airframe 12 has a three-point connecting portion (traveling vehicle connecting portion) 16 that is detachably connected to a three-point link at the rear of the tractor (not shown). The three-point connecting portion 16 is composed of one top mast 17 and two lower arms 18 and the like in a pair on the left and right.

Further, the airframe 12 has a mission case portion 21 which is a shaft holding portion for rotatably holding an input shaft 20 connected to the PTO shaft of the tractor via a joint. The inner ends of the frame pipe portion 22, which is a frame portion extending in the left-right direction, are attached to both the left and right sides of the mission case portion 21.

Further, a chain case portion 23, which is a tiller support portion on one side, is attached to the outer end portion of the frame pipe portion 22 on the left side, and a chain case portion 23 on the other side is attached to the outer end portion of the frame pipe portion 22 on the right side. A bracket portion 24, which is a tiller support portion, is attached. A tiller body 13 is rotatably installed between the chain case portion 23 and the bracket portion 24 which are separated from each other and face each other. A side cover plate 25, which is a side plate portion, is attached to the chain case portion 23 and the bracket portion 24, respectively.

The tiller body 13 has a tiller shaft 26 that is longitudinally longitudinal in the left-right direction, and a plurality of tiller claws 27 attached to the tiller shaft 26. Then, the tilling shaft 26 rotates together with the tilling claw 27 by the power from the input shaft 20 side, and the tilling work is performed by the rotating tilling claw 27.

Further, the upper portion of the tillage body 13 is covered with, for example, a plate-shaped rubber tillage cover plate 31. The tillage cover plate 31 is supported by a plurality of support plates (rubber receiving plates) 32. The front end side of each support plate 32 is attached to the front frame portion 33 of the machine body 12, and the rear end side of each support plate 32 is attached to the rear frame portion 34 of the machine body 12.

A gauge wheel 35 is provided on the front frame portion 33, and a leveling body 14 is rotatably attached to the rear frame portion 34 via a plurality of hinges 36. A ground pressure adjusting means 37 for adjusting the ground pressure of the ground leveling body 14 with respect to the field scene is installed between the ground leveling body 14 and the machine body 12.

The ground leveling body 14 is formed on a plate-shaped ground leveling body main body 41 that is longitudinal in the left-right direction, side plate portions 42 fixed to both ends of the ground-leveling body main body 41 in the left-right direction, and the back surface of the ground leveling body main body 41. It has an erected back plate portion 43. Further, the ground leveling body main body 41 has an obtuse-angled bent portion 45 on the upper side, and has a curved portion 46 bent in a curved shape toward the tillage body 13 side on the lower end side. Have in. In the illustrated example, the curved portion 46 is covered with, for example, a stainless steel plate 47 which is a soil adhesion prevention plate, but the stainless steel plate 47 may not be provided.

Further, the agricultural work machine 11 is a rubber cover plate which is an elastic body for preventing soil adhesion, which is an elastically deformable plate having a longitudinal shape in the left-right direction that covers the surface (inner surface) of the ground preparation body 14 on the cultivated body 13 side. By supporting the 51 and the left and right side ends of the rubber cover plate 51 in a plane shape from the lower side so that the side ends do not bend downward due to their own weight, the ground preparation body of the ground preparation body 14 Prevents (suppresses) soil from entering between the part 41 and the rubber cover plate 51 from the side. It is equipped with a holding plate 52 which is.

As is clear from FIG. 3B, for example, the holding plate 52, which is a metal support plate, is provided only on the left and right side ends of the leveling body 14, and is provided on both the left and right sides of the leveling body 14. It is not provided in any part other than the end. The horizontal length dimension of the rubber cover plate 51 is slightly smaller than the horizontal length dimension of the ground leveling body main body 41 of the ground leveling body 14. Therefore, there is a slight slit-shaped gap 53 between the side end surface of the rubber cover plate 51 and the inner surface of the side plate portion 42 of the ground leveling body 14.

Further, as is clear from FIGS. 4 and 5, there is a collision with soil between the inner surface (front surface) of the ground leveling body 41 of the ground leveling body 14 and the facing surface of the rubber cover plate 51 facing the inner surface (front surface). There is a gap 55 for elastically deforming the rubber cover plate 51 due to vibration or the like. That is, the rubber cover plate 51 can be attached to and detached from the ground leveling body 14 by a plurality of upper mounting means 56 and lower mounting means 57, respectively, so that a gap 55 for elastic deformation is formed between the rubber cover plate 51 and the ground leveling body 14. (Available) is attached.

The presser plate 52 is attached to the ground leveling body 14 together with the rubber cover plate 51 at two locations above and below by the upper mounting means 56 and the lower mounting means 57 (57a) at the side end positions. In other words, the holding plate 52 is fastened and fixed to the ground leveling body 14 together with the side ends of the rubber cover plate 51 by two upper and lower mounting means (common fixing means) 56 and 57.

The upper mounting means 56 includes, for example, a set pin (female screw member) 63 in which the screw hole portion 61 is formed in the shaft portion 62, a bolt (male screw member) 65 in which the screw shaft portion 64 is screwed into the screw hole portion 61, and a washer. It is composed of 66 and two washers 67 and 68, which are holding members. In the enlarged cross-sectional view in FIG. 4, hatching is omitted.

Further, in the vicinity of the upper end portion of the rubber cover plate 51, an upper hole portion 70 into which the shaft portion 62 of the stop pin 63 is inserted is formed. In the illustrated example, the rubber cover plate 51 and the pressing plate 52 that overlap each other are sandwiched and fixed by the two washers 67 and 68, but for example, the rubber cover plate 51 moves slightly with respect to the stop pin 63. You may do so.

The lower mounting means 57 includes, for example, a countersunk bolt (male screw member) 72 in which the head 71 is formed in a conical shape, a nut (female screw member) 74 into which the screw shaft portion 73 of the countersunk bolt 72 is screwed. It is composed of a washer 75 and a countersunk bolt receiving member 76. However, of the plurality of lower mounting means 57, the lower mounting means 57 (57a) at the side end position used for mounting the holding plate 52 does not have the countersunk bolt receiving member 76. Further, at the lower end of the rubber cover plate 51, a screw shaft portion 73 of the countersunk bolt 72, or a lower hole portion 80 into which the head portion 71 of the countersunk bolt 72 and the countersunk bolt receiving member 76 are inserted is formed.

Here, as shown in FIGS. 6A and 6B, the holding plate 52, which is a supporting means for supporting the side end portion of the rubber cover plate 51, has, for example, a side view, and is a ground leveling body. It is bent at only one place in the middle so as to correspond to the bent portion 45 of the ground leveling body main body 41 of 14. That is, the holding plate 52 has a bent portion 81 bent at the same obtuse angle as the bent portion 45 of the ground leveling body 14 on the upper side.

The side end portion of the rubber cover plate 51 overlaps with the side view-shaped presser plate 52 and has the same side view omission shape. The side end portion of the rubber cover plate 51 is the presser plate. Since it is sandwiched between the 52 and the ground leveling body 41, it is maintained in a side-viewing shape even during work.

Further, a perfect circular upper mounting hole 82 into which the screw shaft portion 64 of the bolt 65 of the upper mounting means 56 is inserted is formed at the upper end of the holding plate 52. On the other hand, at the lower end of the holding plate 52, a conical lower mounting hole (counterbore hole) 83 into which the head 71 of the countersunk bolt 72 of the lower mounting means 56 is inserted (fitted) is formed. There is. Since the lower mounting hole 83 receives the head 71 of the countersunk bolt 72, the lower mounting means 57a used for mounting the holding plate 52 does not require the countersunk bolt receiving member 76.

Further, the longitudinal length dimension of the presser plate 52 is smaller than the lateral length dimension of the rubber cover plate 51, and the side end portion of the rubber cover plate 51 is positioned so as to project upward from the upper end portion of the presser plate 52. It has a protruding portion 85 at the upper end (see FIG. 4). Further, the pressing plate 52 is located inward from the side edge of the rubber cover plate 51, and is slightly separated from the side plate portion 42 of the ground leveling body 14 (see FIG. 3B).

For example, the width dimension of the pressing plate 52 may be increased so that the pressing plate 52 comes into contact with the side plate portion 42 of the ground leveling body 14. Further, for example, the upper mounting hole portion 82 is formed in the sag hole like the lower mounting hole portion 83, and the upper end portion of the holding plate 52 is set to the side end portion of the rubber cover plate 51 by using the countersunk bolt corresponding to the sagging hole. It may be attached.

Next, the operation and the like of the agricultural work machine 11 will be described.

When the agricultural work machine 11 is connected to the rear part of the tractor and the agricultural work machine 11 is moved forward by the forward traveling of the tractor, the tiller body 13 performs the tillage work while rotating in a predetermined direction, and the ground leveling body 14 is a rubber cover plate 51. And the ground leveling work together with the stainless steel plate 47.

At this time, since the surface of the ground leveling body 14 on the cultivated body 13 side of the ground leveling body main body 41 is covered with the rubber cover plate 51 and the stainless steel plate 47, the cultivated soil cultivated by the cultivated body 13 is covered on the surface. It does not come into direct contact and does not adhere.

Further, since both ends of the rubber cover plate 51 in the left-right direction are supported from the lower side by the left and right pressing plates 52 so as not to hang down due to their own weight, the cultivated soil cultivated by the tiller body 13 is covered with a rubber cover. There is almost no penetration between the rubber cover plate 51 and the ground preparation body 41 through the gap 53 between the side end surface of the plate 51 and the side plate 42 of the ground preparation body 14, and even if some penetration occurs, the soil grows significantly. There is no such thing.

Then, according to such an agricultural work machine 11, the left and right side ends of the rubber cover plate 51 are supported between the ground leveling body 14 and the rubber cover plate 51 so that the side ends do not bend due to their own weight. Since the holding plate 52 for preventing (suppressing) the intrusion of soil is provided, it is possible to prevent the invasion of soil between the ground leveling body 14 and the rubber cover plate 51. Therefore, for example, it is possible to prevent adverse effects on performance and an increase in maintenance burden on the operator, and it is also possible to prevent damage to the rubber cover plate 51 due to intrusion of soil.

Further, since the holding plate 52 is provided only on the left and right side ends of the ground leveling body 14 and supports only the left and right side ends of the rubber cover plate 51, the rubber cover plate 51 other than the left and right side ends is supported. Since the portion is bent (dripping) due to its own weight, soil does not easily adhere to the rubber cover plate 51, and even if it adheres, it easily falls off.

Further, since the holding plate 52 is formed in an elongated plate shape that is bent so as to correspond to the ground leveling body 14, the side end portion of the rubber cover plate 51 can be sandwiched between the ground leveling body 14 and the soil intrusion prevention. Can be properly planned.

Next, a second embodiment of the present invention will be described with reference to FIG.

The holding plate (soil intrusion prevention body) 52 of the agricultural work machine 1 according to the second embodiment is different from the one of the first embodiment, and the left and right positions can be adjusted with respect to the ground leveling body 14. There is.

That is, the mounting holes 82 and 83 of the presser plate 52 are both formed in the shape of elongated holes having a longitudinal direction in the left-right direction, and the left-right position of the presser plate 52 can be adjusted by the elongated holes. Therefore, as shown in FIG. 7, the gap 53 can be closed by the pressing plate 52 by bringing the side end surface of the pressing plate 52 into contact with the side plate portion 42 of the ground leveling body 14 by adjusting the position of the pressing plate 52. It is possible to prevent the intrusion of the material even more appropriately. In this illustrated example, the lower mounting hole 83 is not a counterbore hole, and the male screw member of the lower mounting means 57 is also a normal hexagon bolt, but for example, the bolt head does not protrude from the surface of the holding plate 52. The long hole-shaped lower mounting hole 83 may be formed into a counterbore long hole by counterbore processing.

Although not shown, for example, the longitudinal length dimension of the presser plate 52 and the lateral length dimension of the rubber cover plate 51 are made equal so that the slit-shaped gap 53 is closed by the presser plate 52 over the entire length. You may. Further, for example, the side end surface of the rubber cover plate 51 may be brought into contact with the side plate portion 42 of the ground leveling body 14 so that the gap 53 is not formed.

Next, a third embodiment of the present invention will be described with reference to FIG.

The agricultural work machine 1 according to the third embodiment supports the ground leveling body 14 and the rubber cover plate 51 by supporting the side end portion of the rubber cover plate 51 from the lower side so that the side end portion does not bend due to its own weight. It is provided with a support means 91 that functions as a soil intrusion prevention body that prevents (suppresses) the invasion of soil between the two.

The support means 91 is the same as the lower mounting means 57, and is composed of, for example, a countersunk bolt 72, a nut 74, a countersunk bolt receiving member 76, and the like. It is attached to a portion located between the side attachment means 57 and the side attachment means 57.

Further, even with the configuration shown in FIG. 8, it is possible to prevent soil from entering between the ground leveling body 14 and the rubber cover plate 51. Note that, for example, the side end portions of the rubber cover plate 51 may be supported by using a plurality of supporting means 91 arranged in the lateral direction of the rubber cover plate 51.

Further, for example, as in the fourth embodiment shown in FIG. 9, the rubber cover plate 51 may be in close contact with the ground leveling body main body 41 of the leveling body 14 so that the gap 55 is not formed. And, in this structure, the invasion of soil can be prevented more effectively than the structure in which the gap 55 is formed. For example, the length dimension of the presser plate 52 in the longitudinal direction is adjusted to the length of the side end portion of the rubber cover plate 51 so that the entire side end portion of the rubber cover plate 51 is always in close contact with the ground leveling body main body 41. May be good.

Further, for example, as in the fifth embodiment shown in FIG. 10, the pressing plate 52 may be formed in an elongated flat plate shape so that the pressing plate 52 does not have the bent portion 81, and the illustrated flat bar may be formed. Counterbore holes 82 and 83, which are mounting holes, are formed at both ends of the holding plate 52.

Although some embodiments of the present invention and modified examples thereof have been described, it is also possible to appropriately combine the embodiments and the modified examples without departing from the gist of the present invention.

11 Agricultural work machine
13 Tillage
14 Leveling body
51 Rubber cover plate that is an elastic body
52 Presser plate that is a soil intrusion prevention body
91 Support means that is a soil intrusion prevention body

Claims (5)

A tiller body for tilling work and
A ground leveling body that performs ground leveling work behind the tillage body,
An elastic body that covers the surface of the ground leveling body on the cultivated body side,
An agricultural work machine provided with a soil intrusion preventive body for preventing soil from invading between the ground leveling body and the elastic body. The agricultural work machine according to claim 1, wherein the soil intrusion prevention body prevents soil from entering between the ground leveling body and the elastic body by supporting at least a side end portion of the elastic body. The agricultural work machine according to claim 1 or 2, wherein the soil intrusion prevention body is provided only on the left and right side ends of the ground leveling body. The agricultural work machine according to any one of claims 1 to 3, wherein the soil intrusion prevention body is formed in an elongated plate shape. The agricultural work machine according to any one of claims 1 to 4, wherein the soil intrusion prevention body is bent so as to correspond to a ground leveling body.

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