JP5610401B2 - Farm work vehicle - Google Patents

Description

  The present invention relates to a farm vehicle for performing various farming operations such as planting work of bulbs and seedlings, crop harvesting work, and the like on an agricultural field while an operator is seated on a seat.

  As a conventional example, the agricultural work vehicle described in Patent Document 1 by the present applicant is exemplified. As shown in FIG. 10, the farm vehicle 101 is supported by a left and right front wheel 102 and a left and right rear wheel 103 disposed so as to straddle the kite U so as to be able to run in the front-rear direction, which is the length direction of the kite. 104, swivel stands 113 provided on the left and right sides of the body 104, a pair of eaves guide rollers 109 provided on both sides of the eaves U in front of the front wheels 102, the front wheels 102 and the rear wheels 103, respectively. Between a pair of rod guide rollers 109 provided on both sides of the rod U, a seat 105 supported at a low position near the upper surface of the rod by the airframe 104, and the power of the engine 108 as a prime mover A driving unit 107 that drives the rear wheel 103, a seedling table 106 as a work table supported above the front wheel 102, and a pre- And a preliminary seedling case base 110 for placing seedlings case 110a.

  The swivel stand 113 is movably provided between a support state Sa that contacts the ground and supports the airframe 104 and a retreat state Sb that does not support the airframe 104 away from the ground, and in the support state Sa, the rear wheel 103 is moved. The airframe 104 is supported on the ground so as to be able to turn in a state of being floated from the ground, and a grounding ring 120 which is grounded to be able to roll on the ground in the support state Sa, and a stand against the grounded grounding wheel 120. And a support portion 122 that supports the airframe 104 via a mounting seat 121.

  In order to turn the farm work vehicle 101, first, the turning stand 113 on the turning direction side is set to the support state Sa. Next, the body 104 is lifted by holding the vicinity of the front wheel on the side opposite to the turning direction by hand. Then, the fuselage 104 is in a state where it can be turned at one point around the ground wheel 120 of the turning stand 113 and can be turned.

JP 2006-101753 A

However, since the grounding position of the swivel stand 113 is substantially the rear end of the airframe 104, when the operator lifts the front end side of the airframe 104, which is the point of action, with the fulcrum as the fulcrum, the center of gravity of the airframe 104 is the fulcrum. There is a problem that it is located away from the working point side and is heavy and difficult to handle.
It is conceivable that the grounding position of the swivel stand 113 is directly below the center of gravity of the fuselage 104, but in this case, the rear side of the fuselage 104 protrudes longer than the grounding position of the swivel stand 113, and the fuselage When the front side of 104 is lifted, there is a problem that the rear side easily comes into contact with the farm surface.

In order to solve the above problems, the agricultural vehicle according to the present invention is:
By a crawler attached to either the front side or the rear side, the entire body from the one side to the other side is supported by the field so that it can run freely.
The one side of the machine body is equipped with a seat where an operator is seated toward the other side, a driving means for driving the crawler, and a turning means.
The other side of the machine body is equipped with a step part for placing an operator's foot and a handle part for the operator to lift the other side of the machine body when turning,
The swivel means includes a swivel wheel arm having a base end rotatably supported on the one side of the airframe by a support shaft extending in the left-right direction, and a swivel rotatably supported by a distal end of the swivel wheel arm. A support state in which the swivel wheel arm rotates substantially downward and the swivel wheel supports the airframe instead of the crawler, and the swivel wheel arm rotates to the one side and does not support the airframe. A farm vehicle configured to be switchable between a retracted state,
The turning means is attached with a turning element that turns integrally with the turning wheel arm,
The rotating element is configured to be positioned relatively on the one side in the front-rear direction of the airframe when the center of gravity is in the supporting state as compared to when the rotating element is in the retracted state.

  According to this configuration, when the turning means is in the support state, the center of gravity of the rotating element is positioned on the one side relative to the position in the retracted state. Move relatively to the one side. For this reason, the burden when the operator lifts the handle portion as the action point on the other side with the turning wheel on the one side as a fulcrum or turns the body in that state is reduced. The

As the farm work vehicle,
The said rotation element illustrates the aspect which is a sunshade which covers the upper part of the said seat part.

  According to this configuration, since the functional element in the farm vehicle is used as the rotating element instead of a simple weight, an extra weight is not increased in the farm vehicle.

  According to the agricultural work vehicle according to the present invention, when turning the aircraft, the load on the operator lifting the other side of the aircraft is reduced by using either the front side or the rear side of the aircraft as a fulcrum. Excellent effect.

It is a side view of the agricultural working machine which concerns on 1st embodiment which actualized this invention. It is a top view of the farming machine. It is an enlarged side view of the rear side of the farm working machine. (A) is the IVa-IVa sectional view taken on the line of FIG. 1, (b) is the IVb-IVb sectional view taken on the line of FIG. It is a side view which shows the state which is turning the agricultural working machine. It is a side view of the agricultural working machine which concerns on 2nd embodiment which actualized this invention. It is a top view of the farming machine. It is a figure which shows the wheel of the crawler of the same agricultural working machine, (a) is a plane sectional view of a wheel, (b) has shown the side view of the sprocket with which the wheel was mounted | worn, respectively. It is a side view which shows the state which is turning the agricultural working machine. It is a side view of the conventional agricultural machine.

  1 to 5 show a farm vehicle 1 according to a first embodiment that embodies the present invention. In each figure, an arrow F indicates the front side of the machine body. As shown in FIGS. 1 and 2, the farm work vehicle 1 of this example is configured to travel with a worker W along a groove M of a field that has been grooved in advance. On the other hand, the operator W is directly used to plant a raccoon bulb N by reaching out to the field scene, and the crawler 2 attached to the rear side is used to move the whole from the rear side to the front side. Is provided with an airframe 3 that is supported by a farm so that it can run freely.

As shown in FIGS. 1 and 4, the airframe 3 is designed to be self-propelled at a height that does not touch the ridge U in a grooved field.
On the rear side of the machine body 3, a seat portion 4 on which an operator sits facing the front side, a sunshade 15 as a rotating element (described later) disposed above the seat portion 4, and the crawler 2 are driven. A driving means 5 for turning and a turning means 6 are provided.
On the front side of the airframe 3, three sets of guide means 20 for guiding the advancing direction of the airframe along the groove M, a step portion 22 for placing an operator's foot seated on the seat portion 4, and a Raccoon bulb N And a handle portion 25 for an operator to lift the other side of the machine body when turning.
Thus, in this example, by providing relatively heavy components such as the crawler 2 and the driving means 5 on the rear side of the machine body 3, only the ground surface of the crawler 2 provided on the rear side of the machine body 3 is used. Is not provided with a support means such as a front wheel for supporting the front side of the body 3.

  The guide means 20 includes a guide wheel arm 26 whose base end portion is rotatably supported by a shaft 23 extending in the left-right direction with respect to an arm mounting seat 27 attached to the body 3, and a distal end portion of the guide wheel arm 26. The guide wheel 21 is rotatably supported by the guide wheel 21. The guide wheel 21 dropped into the guide groove M guides the traveling direction of the airframe 3 along the guide groove M. ing. As described above, the guide means 20 is grounded to the field when the guide wheel 21 is dropped into the guide groove M, but does not support the machine body 3. The guide wheel 21 is formed in an abacus bead shape, and both side surfaces thereof are in contact with the inclined side surfaces of the groove M so as to roll as the machine body 3 advances. In this example, three sets of guide means 20 are arranged at equal intervals in the width direction of the machine body 3. The mounting positions of the left and right arm mounting seats 27 on the machine body 3 in the left-right direction can be adjusted so as to correspond to various grooves. According to this configuration, the entire machine body can be reliably run along the groove M even in the groove M that is not formed in a straight line or the groove M that is provided along the contour line of the inclined ground. For this reason, the worker W can concentrate on the farm work. As shown in FIG. 4 (a), the left and right arm mounting seats 27 are provided with step portions 22 formed so as to drop into the grooves M, respectively. The attachment position to the body 3 is adjusted integrally.

  The handle portion 25 is for lifting the front side of the airframe 3 and protrudes forward from both the left and right sides of the front side of the airframe 3. When the handle portion 25 is bent backward as shown in FIG. The handle portion 25 is configured to be exposed on the front side of the body 3.

  The crawler 2 is configured to travel in the same groove as the guide wheels 21, and three corresponding to the three guide wheels are provided on the rear side of the machine body.

  The drive means 5 includes a battery 30, an electric motor 31 as a prime mover operated by the battery 30, and a power transmission mechanism 33 that transmits the rotational force of the electric motor 31 to each crawler 2. An operator can control the driving state by a foot switch 34 provided in front of the section 22.

  The sunshade 15 includes a support column 36 erected with respect to the airframe 3, a ceiling 37 that protrudes forward from the upper end of the support column 36, and a cover 38 that covers the ceiling 37. .

  The turning means 6 includes a support shaft 11 that is supported in a freely rotating manner with respect to the airframe 3, a turning wheel arm 12 that is attached to each side of the support shaft 11, and each turning wheel arm 12. And a switching means 14 for switching the state of the turning wheel 13 to a support state Sa (see FIG. 5) or a retracted state Sb (see FIG. 1). The support state Sa is a state in which the turning wheel arm 12 is rotated substantially downward and the turning wheel 13 is supporting the body 3 instead of the crawler 2, and the retreating state Sb is a state in which the turning wheel arm 12 is rotated substantially rearward. 3 is not supported.

  As shown in FIG. 3, the switching means 14 is attached to the support shaft 11, a positioning guide 41 formed in a fan shape centered on the support shaft 11, and attached to the machine body 3. A projecting piece 42 projecting from the projecting piece 42, a guide hole 42a extending through the projecting piece 42 and extending substantially in the radial direction of the support shaft 11, and a positioning inserted so as to be slidable in the longitudinal direction of the guide hole 42a. A bar 43 and an arm 44 pivotally supported on the machine body 3 so as to support the positioning bar 43 so as to be reciprocally movable in a substantially radial direction of the support shaft 11 are provided. The positioning guide 41 is formed with two front and rear recesses 41a at its peripheral edge, and when the positioning bar 43 is fitted into the rear recess 41a, the turning means 6 is fitted into the support state Sa and the front recess 41a. The swiveling means 6 can be fixed in the retracted state Sb.

A sunshade 15 as a turning element is attached to the support shaft 11 or the turning wheel arm 12 so as to turn integrally with the turning wheel arm 12. The sunshade 15 has a center of gravity of the sunshade 15 when it is in the support state Sa (the state in which the support column 36 has fallen rearward) compared to when it is in the retracted state Sb (in the state in which the support column 36 is upright). Cr is configured to be positioned relatively rearward in the front-rear direction of the body 3.
A part other than the sunshade 15 can be adopted as the turning element. In this case, the center of gravity of the part is centered on the support shaft 11 in the retracted state Sb and is substantially upward from the front of the support shaft 11. It is preferable to be located within an angle range of approximately 90 ° up to.

  Next, a method in which the worker W turns the agricultural work vehicle 1 with the turning means 6 will be described. First, the farm vehicle 1 is stopped at the end of the groove M. At this time, the turning means 6 is in the retracted state Sb. Next, on the rear side of the airframe 3, the support 36 of the sunshade 15 or the swivel wheel arm 12 is supported with one hand, the positioning bar 43 is removed from the recess 41a with the other hand, and the swiveling means 6 is supported. The positioning bar 43 is fitted into the recess 41a by turning to Sa. Then, the center of gravity Cr of the sunshade 15 as a turning element is positioned relatively rearward in the front-rear direction of the body 3. At the same time, when the three guide means 20 are raised on the front side of the body 3 and tilted backward, the handle portion 25 is exposed to the front side of the body 3. Next, as shown in FIG. 5, the front side of the airframe 3 is lifted by holding the handle portion 25, the airframe 3 is turned, and then the front side of the airframe 3 is lowered. Finally, when the three sets of guide means 20 and turning means 6 are returned to the state before turning, the turning is completed.

  According to the farm vehicle 1 of the present example configured as described above, when the turning means 6 is in the support state Sa, the center of gravity Cr of the sunshade 15 as the turning element is more than the position in the retracted state Sb. Since it is located relatively on the rear side, the center of gravity of the entire farm vehicle also moves relatively rearward. For this reason, the burden at the time of the operator W lifting the handle | steering-wheel part 25 or turning the body 3 in the state is made light by using the turning wheel 13 on the rear side as a fulcrum and the action point on the front side.

  Moreover, in this example, the shade 15 which covers the upper part of the seat part 4 is employ | adopted as the said rotation element. As described above, since the functional element in the agricultural work vehicle 1 is used as the rotating element instead of a simple weight, an excessive weight is not increased in the agricultural work vehicle 1.

  Next, FIGS. 6 to 9 show a second embodiment in which the present invention is embodied. This farm work vehicle is mainly different from the first embodiment in the following points. Accordingly, portions common to the embodiment are given the same reference numerals, and redundant description is omitted.

As shown in FIGS. 6 to 8, the machine body 3 of the present example is supported by the field so that it can run freely from the front side to the rear side by the crawler 2 attached to the front side.
On the front side of the machine body 3, a seat portion 4 on which an operator is seated facing rearward, a sunshade 15 as a rotating element described later disposed above the seat portion 4, and the crawler 2 are driven. Driving means 5, turning means 6, a set of guide means 20 for guiding the traveling direction of the machine body along the groove M, and three groove cutters 51 disposed on the rear side of each crawler 2. Equipped.
On the rear side of the airframe 3, a step portion 22 for placing the operator's feet seated on the seat portion 4, a container 8 for storing a rachicho bulb N, and an operator at the time of turning A handle portion 25 for lifting the other side is provided.

  The groove cutters 51 are arranged in the width direction of the machine body 3 with an interval equal to the interval of the grooves M. The tip of the grooving device 51 is configured to be nested so that it can expand and contract, so that the grooving depth can be adjusted.

  As shown in FIG. 8, the wheel 55 of the crawler 2 has a sprocket 57 mounted between a pair of wheel main bodies 56. The sprocket 57 is formed to have the same diameter as the wheel main body 56 and the teeth 57 a engaged with the engagement holes 58 a of the crawler belt 58 wound around the wheel 55. And a support portion 57b to be supported, and a concave portion 57c which is formed to have a smaller diameter than the support portion 57b and does not support the inner surface of the crawler belt 58.

  Next, a method in which the worker W turns the agricultural work vehicle 1 with the turning means 6 will be described. First, the farm vehicle 1 is stopped at the end of the groove M. At this time, the turning means 6 is in the retracted state Sb. Next, on the front side of the airframe 3, the support 36 of the sunshade 15 or the swivel wheel arm 12 is supported by one hand, the positioning bar 43 is removed from the recess 41a with the other hand, and the swiveling means 6 is supported. And the positioning bar 43 is fitted into the recess 41a. Then, the center of gravity of the sunshade 15 as a turning element is positioned relatively forward in the front-rear direction of the body 3. At the same time, the guide means 20 is raised and tilted backward. Next, as shown in FIG. 9, on the rear side of the body 3, the rear side of the body 3 is lifted by holding the handle portion 25, the body 3 is turned, and the rear side of the body 3 is lowered. Finally, when the guiding means 20 and the turning means 6 are returned to the state before the turning, the turning is completed.

According to the farm work vehicle of this example, in addition to the same effects as those of the first embodiment, the following effects can be obtained.
(A) Since the guide means 20 is raised so that it can be stored compactly above the turning means 6, the weight burden on the handle portion 25 side can be reduced when the body 3 is turned.
(B) Since the grooving device 51 is provided on the rear side of the crawler 2, it is possible to form a clean groove suitable for planting, which is suitable for planting, with respect to the field scene that has been crushed by the crawler 2.
(C) Since the concave portion 57c is provided between the teeth 57a of the sprocket 57 of the crawler 2, it is possible to make it difficult for soil to accumulate between the teeth 57a.

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) Instead of the sunshade 15 as the rotating element, a simple weight is adopted.
(2) For a farm field in which the space between the ridges is widely formed, a heel guide roller (for example, the heel guide roller 109 of the conventional example) whose peripheral surface abuts on the side surface of the ridge U instead of the guide wheel 21 of the groove M is adopted. .
(3) The drive means 5 is configured to drive the crawler 2 by the power of the engine as a prime mover.

DESCRIPTION OF SYMBOLS 1 Farm vehicle 2 Crawler 3 Machine body 4 Seat part 5 Drive means 6 Turning means 8 Container 11 Support shaft 12 Turning wheel arm 13 Turning wheel 14 Switching means 15 Sunshade 20 Guide means 21 Guide wheel 22 Step part 23 Shaft 25 Handle part 26 Guide wheel arm 27 Arm mounting seat 30 Battery 31 Electric motor 33 Power transmission mechanism 34 Foot switch 36 Post 37 Ceiling 38 Cover 41 Positioning guide 41a Recess 42 Projection piece 42a Guide hole 43 Positioning bar 44 Arm 51 Grooving device 55 Rolling wheel 56 Rolling Wheel body 57 Sprocket 58 Crawler belt Cr Center of sunshade F Front side of machine body Sa Support state Sb Retracted state U 畝 M Groove W Worker

Claims (2)

By a crawler attached to either the front side or the rear side, the entire body from the one side to the other side is supported by the field so that it can run freely.
The one side of the machine body is equipped with a seat where an operator is seated toward the other side, a driving means for driving the crawler, and a turning means.
The other side of the machine body is equipped with a step part for placing an operator's foot and a handle part for the operator to lift the other side of the machine body when turning,
The swivel means includes a swivel wheel arm having a base end rotatably supported on the one side of the airframe by a support shaft extending in the left-right direction, and a swivel rotatably supported by a distal end of the swivel wheel arm. A support state in which the swivel wheel arm rotates substantially downward and the swivel wheel supports the airframe instead of the crawler, and the swivel wheel arm rotates to the one side and does not support the airframe. A farm vehicle configured to be switchable between a retracted state,
The turning means is attached with a turning element that turns integrally with the turning wheel arm,
The agricultural vehicle configured to be positioned relatively to the one side in the front-rear direction of the machine body when the center of gravity of the rotating element is in the supporting state as compared to when the rotating element is in the retracted state. .   The agricultural vehicle according to claim 1, wherein the rotating element is a sunshade that covers an upper portion of the seat portion.

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