JP2000253705A - Farm working machine furnished with stand and connection method of farm working machine with stand to tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a farm working machine furnished with a stand and capable of easily connecting the main body of the farm working machine to a quick coupler. SOLUTION: A three-point engaging part 41 having an upper engaging part 42 and lower engaging parts 43a and 43b is placed at the front part of a farm machine main body 10 having a gravity center O deviated from the center of the width. The farm machine main body 10 has stand-attaching parts 51a and 51b at both sides and a light-load side stand 61a and a heavy-load side stand 61b are attached to the stand-attaching parts 51a and 51b. The height of the heavy-load side stand 61b is made to be higher than that of the light-load side stand 61a and a 2nd caster 66 is placed behind a 4th caster 64. The farm working machine main body 10 is rotated around a prescribed rotation center axis by the upward rotation of a three-point hitch part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a farming machine with a stand and a method of connecting the farming machine with a stand to a tractor. In particular, the center of gravity of the body of the farming machine is offset from the center in the width direction of the body of the farming machine. The present invention relates to a farm working machine with a stand and a method of connecting the farm working machine with a stand to a tractor, which makes it easy to connect the main body of the farm working machine to the quick coupler even when the user is in mind.

[0002]

2. Description of the Related Art Conventionally, in order to easily move a farm work machine such as a ridge coater and a trench machine in a warehouse, a stand device is detachably attached to both sides of a main body of the farm work machine. The stand device supports the agricultural working machine body in a state of being lifted from the ground.

[0003] In an agricultural work machine equipped with this stand device, that is, an agricultural work machine with a stand, not only is it easy to move in a warehouse, etc., but also the quick coupler mounted on the three-point link hitch portion of the tractor. Connection work is simplified.

That is, after the upper engaging portion of the quick coupler is positioned below the upper engaging portion of the three-point engaging portion of the farm working machine body of the agricultural machine with a stand, the three-point link hitch portion of the tractor is moved. When rotated upward, the upper engaging portion of the agricultural working machine main body engages with the upper engaging portion of the quick coupler. Subsequently, when the three-point link hitch portion is further rotated upward, the agricultural working machine main body is rotated. The pair of left and right lower engaging portions are engaged with the pair of right and left lower engaging portions of the quick coupler substantially simultaneously from the same ground level position, and the main body of the agricultural work machine is automatically connected to the quick coupler. ing.

[0005]

However, if the center of gravity of the main body of the agricultural working machine is eccentric from the center in the width direction of the main body of the farm working machine, the upper engaging portion of the main body of the farm working machine and the quick coupler are not used. When the three-point link hitch portion is further rotated upward in a state where the upper engagement portion is engaged, the main body of the agricultural work machine is tilted, and the pair of lower engagement portions on the left and right sides of the main body of the agricultural work machine are different from each other in ground height. Position.

[0006] As a result, the lower engaging portions of the main body of the agricultural work machine are located at different ground height positions, so that these lower engaging portions are not properly engaged with the lower engaging portions of the quick coupler.

For this reason, when the center of gravity of the agricultural working machine body is eccentric from the center in the width direction of the agricultural working machine body,
The work assistant must assist the agricultural work machine main body so as not to be tilted, and there is a problem that connecting work of the farm work machine main body to the quick coupler becomes complicated.

The present invention has been made in view of such a point, and even if the center of gravity of the main body of the agricultural work machine is eccentric from the center in the width direction of the main body of the farm work machine, the agricultural work machine is connected to the quick coupler. It is an object of the present invention to provide an agricultural work machine with a stand and a method of connecting the agricultural work machine with a stand to a tractor, which can easily connect the main body.

[0009]

According to a first aspect of the present invention, there is provided a farm working machine with a stand which engages with an upper engaging portion and a pair of left and right lower engaging portions of a quick coupler attached to a three-point link hitch portion of a tractor. An agricultural work machine main body having an upper engaging portion and a three-point engaging portion having a pair of left and right lower engaging portions at the front portion, a stand mounting portion on both sides, and a center of gravity eccentric from the center in the width direction; A stand device attached to both stand attachment portions of the agricultural work machine main body, and a stand device for supporting the farm work machine body in a state of being lifted from the ground, wherein the agricultural work machine supported by the stand device When the main body is connected to the quick coupler attached to the three-point link hitch portion of the tractor, by turning the three-point link hitch portion of the tractor upward, The upper engaging portion of the agricultural working machine main body engages with the upper engaging portion of the quick coupler, and the further upward rotation of the three-point link hitch portion of the tractor causes the light weight side of the agricultural working machine main body to rotate. The main body of the agricultural working machine is rotated at a predetermined rotation center so that one lower engagement portion is engaged with one corresponding lower engagement portion of the quick coupler prior to engagement of the other lower engagement portion. Rotating about an axis, the pair of left and right lower engaging portions of the agricultural work machine main body engage with the pair of left and right lower engaging portions of the quick coupler from substantially the same ground level position.

When the three-point link hitch portion of the tractor is rotated upward, the upper engaging portion of the agricultural work machine engages with the upper engaging portion of the quick coupler, and then the three-point link hitch portion of the tractor. Is rotated further upward, one lower engaging portion on the light load side of the agricultural work machine body is engaged with the corresponding lower engaging portion of the quick coupler prior to engagement of the other lower engaging portion. So that the main body of the agricultural work machine rotates about a predetermined rotation center axis, and the pair of lower engaging portions of the left and right sides of the main body of the farm work machine are moved from substantially the same ground level position to the pair of right and left of the quick coupler. Since it engages with the lower engaging portion, even when the center of gravity of the agricultural working machine body is eccentric from the center in the width direction, unlike the related art, there is no need to assist the agricultural working machine body so as not to tilt.

[0011] A farm working machine with a stand according to claim 2 is
The agricultural machine with a stand according to claim 1, wherein the stand device includes a heavy-load-side stand attached to a stand attachment portion provided on one side of the side of the agricultural machine with a decentered center of gravity; A light load side stand attached to a stand attachment portion provided on the other side opposite to the side where the center of gravity is eccentric, wherein the height dimension of the heavy load side stand is When the tractor is pivoted upwardly of the three-point link hitch portion, the farm working machine main body connects the upper engaging portion of the farm working machine main body and the rear end of the heavy load side stand body. By rotating the connected axis as a rotation center axis, the pair of left and right lower engaging portions of the main body of the agricultural work machine are engaged with the pair of left and right lower engaging portions of the quick coupler from substantially the same ground level position. Is what you do.

When the tractor is pivoted upwardly of the three-point link hitch portion, the agricultural working machine main body forms an axis connecting the upper engaging portion of the agricultural working machine main body and the rear end of the heavy load side stand body. Rotating as a rotation center axis, the pair of left and right lower engaging portions of the agricultural work machine main body engage with the pair of left and right lower engaging portions of the quick coupler from substantially the same ground level position,
Even when the center of gravity of the farm working machine main body is eccentric from the center in the width direction of the farm working machine main body, the operation of connecting the farm working machine main body to the quick coupler is reliably simplified.

[0013] A farm working machine with a stand according to claim 3 is
In the agricultural working machine with a stand according to claim 2, the rear end of the heavy load side stand is disposed at a position rearward of the rear end of the light load side stand.

Since the rear end of the heavy load side stand is disposed at a position rearward of the rear end of the light load side stand, a lower ground height position than in a configuration in which the rear ends are opposed to each other. , The main body of the agricultural work machine can be connected to the quick coupler.

According to a fourth aspect of the present invention, in the method for connecting an agricultural work machine with a stand to a tractor, the agricultural work machine body supported by the stand device and having a center of gravity eccentric from the center in the width direction is attached to the three-point link hitch portion of the tractor. A method for connecting a farm working machine with a stand to a tractor connected to a quick coupler, wherein the quick coupler is mounted below an upper engaging portion of a three-point engaging portion of the farm working machine body supported by the stand device. By locating the upper engagement portion and rotating the three-point link hitch portion of the tractor upward,
Engaging the upper engagement portion of the agricultural work machine main body with the upper engagement portion of the quick coupler; and rotating the three-point link hitch portion of the tractor further upward to move the agricultural work machine main body to a predetermined position. The front side of the agricultural working machine body is rotated in a direction in which the front side of the agricultural working machine body is raised upward about the rotation center axis, and one lower engaging portion on the light load side of the agricultural working machine body is connected to one corresponding lower portion of the quick coupler. Engaging the engaging portion with the engaging portion, and rotating the three-point link hitch portion of the tractor further upward so that the other lower engaging portion on the heavy load side of the agricultural working machine main body corresponds to the quick coupler. And engaging the lower engaging portion by pulling it toward the other lower engaging portion.

When the main body of the agricultural working machine supported by the stand device is connected to the quick coupler mounted on the three-point link hitch portion of the tractor through each process, the center of gravity of the main body of the agricultural working machine is positioned from the center in the width direction. Even if it is eccentric, unlike the conventional case, there is no need to assist the agricultural work machine main body from tilting.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of a farming machine with a stand according to the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 1 denotes a tractor, and a three-point link hitch portion 2 is provided at a rear portion of the tractor 1, and the three-point link hitch portion 2 has a quick coupler 3 for a three-point link hitch. Is detachably attached.

The three-point link hitch 2 has one upper link 5 and a pair of left and right lower links 6a and 6b. The lower links 6a and 6b are interposed by lifting rods 7 and It is suspended by a pair of lift arms.

When the lift arm is moved up and down by hydraulic pressure, the three-point link hitch part 2 rotates upward or downward. Moves up and down. The upper link 5 and the lifting rod 7 can be adjusted in length.

The quick coupler 3 is for automatically connecting the agricultural work machine main body 10 to the three-point link hitch portion 2 of the tractor 1, and has a substantially triangular outer shape as shown in FIG. Have been.

The quick coupler 3 has a base 11 formed in a substantially inverted U-shape with a pipe material. An upper engaging portion 12 is provided at the upper center of the base 11, and a lower part is provided at a lower part. A pair of left and right lower engaging portions 13a and 13b are provided. In addition, both lower engaging portions 13a, 13b of this quick coupler 3
Are located at substantially the same height before the agricultural work machine body 10 is connected.

The upper engaging portion 12 has a pair of upper plates 15 and 15 facing each other. An upper link is provided on the upper front side of each upper plate 15, that is, on the upper side on the side facing the tractor 1. A plurality of connection holes 16 are formed, and the tip of the upper link 5 is connected to an upper link connection hole 16 appropriately selected from the upper link connection holes 16. A substantially semi-circular engaging recess 17 is formed in the rear upper portion of each upper plate 15 so as to be cut downward, and a pin guide 18 is directed rearward and upward following the engaging recess 17. It is formed in an inclined shape.

Each of the lower engaging portions 13a and 13b has a lower plate 22, and a lower link connecting pin 23 is provided at a lower front portion of the lower plate 22, that is, a lower portion facing the tractor 1. Are formed to protrude horizontally,
The distal ends of the lower links 6a and 6b are connected to the lower link connecting pins 23. On the rear side of the lower plate 22, an engagement notch 25 is formed at the center in the vertical direction.

Further, an arm pin 26 is formed on the lower plate 22 so as to protrude outward in a horizontal direction, and a substantially central portion in the longitudinal direction of a lock arm 27 is rotatable on the arm pin 26. The lock arm 27 is urged by a spring 28 in a direction in which the rear side is directed upward. A substantially semi-circular engaging recess 29 is formed in the lock arm 27 so as to be cut downward, and a pin guide portion 30 is formed to be inclined downward and rearward continuously to the engaging recess 29. Have been.

The pin guide 30 of the lock arm 27
In, the lower pin 49 of the agricultural work machine body 10 described later is guided,
When the lock arm 27 is rotated against the urging force of the spring 28 and the lower pin 49 is engaged with the engagement recess 29 and the engagement notch 25, the lower pin 49
Is locked by the lock arm 27, but the lock can be easily released by operating the lever 31 connected to the front end of the lock arm 27.

On the other hand, as shown in FIGS. 1 to 4, the agricultural working machine main body 10 is, for example, a ridge coating machine main body, and the farm working machine main body 10 is lifted from the ground by a predetermined distance by a stand device 40. The agricultural work machine body 10 can be easily moved in all directions in a field or a warehouse.

The farm working machine body 10 has a longitudinal direction in the width direction, and the center of gravity O of the farm working machine body 10 is eccentric from the center in the width direction, and the position of the center of gravity is the center of the farm working machine body 10 in the width direction. A portion on one end side, that is, the tractor 1
Is located on the right side of the traveling direction X.

A three-point engaging part 41 is provided on the other side of the front part of the agricultural working machine main body 10, that is, on the left side which is a light load side.
And a pair of left and right lower engaging portions 43a and 43b respectively engaged with a pair of left and right lower engaging portions 13a and 13b of the quick coupler 3. ing.

As shown in FIG. 1, the upper engaging portion 42
It has a pair of masts 45, 45 protruding toward the tractor 1 side, that is, toward the front.
A top pin 46 is attached between the distal ends of the quick coupler 3, and the top pin 46 removably engages with the engaging concave portion 17 of the upper engaging portion 12 of the quick coupler 3.

Each of the lower engaging portions 43a and 43b has a lower arm 48 protruding forward, and a lower pin 49 is formed at a distal end of the lower arm 48 so as to protrude outward. Are engaged with the engagement recesses 29 and the engagement notches 25 of the lower engagement portions 13a and 13b of the quick coupler 3 in a detachable manner.

The lower engaging portion 43a on the light load side of the agricultural working machine body 10 and the other lower engaging portion 43 on the heavy load side are connected.
b, an input shaft 50 such as a spline shaft is rotatably disposed. The input shaft 50 is connected to a power take-off shaft (PTO shaft) (not shown) of the tractor 1 via a power transmission shaft (not shown). Connected.

Also, on both sides of the agricultural working machine body 10,
A pair of left and right stand mounting portions 51a and 51b are provided. Each of the stand mounting portions 51a and 51b has an elongated cylindrical holder 52 having an axial direction in the vertical direction. 53 are formed. The holder 52 is rotatable so that its orientation can be changed as needed.

Further, the lower part of one side, which is the heavy load side, of the agricultural working machine body 10 is rotated by receiving the power input from the input shaft 50 to form a ridge, as shown in FIGS. A ridge excavation section 55 for excavation is provided, and a ridge coating section 56 is provided behind the ridge excavation section 55. At the ridge coating section 56, soil excavated by the ridge excavation section 55 is applied to the ridge. A new ridge will be created. Reference numeral 57 denotes a straight traveling wheel which gives the tractor 1 a straight traveling property.

On the other hand, as shown in FIGS. 1 to 4, the stand device 40 includes a light load side stand body 61a and a heavy load side stand body 61b.

The light load side stand body 61a is attached to a stand mounting portion 51a provided on the other side of the agricultural work machine main body 10 opposite to the side where the center of gravity O is eccentric. A third caster 63 and a fourth caster 64 are arranged at a predetermined distance from each other along the front-rear direction of the main body 10 of the agricultural working machine.

The heavy load side stand body 61b is attached to a stand mounting portion 51b provided on one side of the agricultural machine body 10 where the center of gravity O is eccentric, and the lower part of the heavy load side stand body 61b is provided. The first caster 65 and the second
The casters 66 are arranged at a predetermined distance from each other along the front-rear direction of the agricultural working machine body 10.

The height H1 of the heavy load side stand body 61b is equal to the height dimension H2 of the light load side stand body 61a.
It is getting bigger.

That is, the heavy load side stand body 61b and the light load side stand body 61a allow the
As shown in FIG. 3, the main body 10 of the agricultural working machine is moved from one end to the other end in the width direction at a predetermined angle α ゜ (for example, about 3 °) with respect to a horizontal line parallel to the ground. To a state inclined downward. This predetermined angle α
゜ is the same as the angle between the center axis of the lower pin 49 and a horizontal line parallel to the ground.

The second caster 66 at the rear end of the heavy load side stand body 61b is disposed at a position behind the fourth caster 64 at the rear end of the light load side stand body 61a.

That is, as shown in FIG. 4, the second caster 66 and the fourth caster 64 are at a predetermined angle β ゜ (for example, about 3 °) as compared with the case where the second caster 66 and the fourth caster 64 are at positions facing each other. The front and rear positions are different. Similarly, the front and rear positions of the first caster 65 and the third caster 63 are different from each other by a predetermined angle β ゜.

On the other hand, as shown in FIG. 4, the heavy load side stand body 61b and the light load side stand body 61a are formed as horizontal rods having substantially the same length and having a longitudinal direction in the front-rear direction. The horizontal plate 71 has a horizontal plate 71
The first to fourth casters 6 are provided at both ends in the longitudinal direction of the
3, 64, 65 and 66 are mounted so that they can be turned in all directions.

A rising bar 72 projects upward from the longitudinal center of the horizontal plate 71, and the upper end of the rising bar 72 is inserted into the insertion hole 53 of the holder 52. The upper end of the rising bar portion 72 is connected and fixed to the holder 52 so that the height position can be adjusted by a connecting pin or the like (not shown).

Next, the operation of the above embodiment will be described with reference to FIG.

When connecting the agricultural working machine body 10 supported by the stand device 40 to the quick coupler 3 attached to the three-point link hitch portion 2 of the tractor 1, first, the first to fourth casters 63, 64, 65 , 66, the agricultural working machine main body 10 is appropriately moved, and the agricultural working machine main body 10 is positioned behind the tractor 1. A power transmission shaft (not shown) has a base end connected to the PTO shaft of the tractor 1 and a front end supported at a predetermined portion of the quick coupler 3.

Then, the tractor 1 is retracted toward the agricultural working machine main body 10, and a quick coupler is located below the upper engaging portion 42 of the three-point engaging portion 41 of the agricultural working machine main body 10 supported by the stand device 40. The third upper engaging portion 12 is located. FIG. 6A shows the state of the agricultural working machine body 10.

Thereafter, when the three-point link hitch portion 2 of the tractor 1 is turned upward by a hydraulic device (not shown), the top pin 46 of the upper engaging portion 42 of the agricultural work machine main body 10 is moved to the upper engaging portion of the quick coupler 3. It is guided by the pin guide portion 18 of the joint portion 12 and engages with the engaging recess 17.

Next, when the three-point link hitch portion 2 of the tractor 1 is further rotated upward, one lower engaging portion 43a on the light load side of the agricultural working machine main body 10 is brought into contact with the corresponding lower portion of the quick coupler 3. The agricultural working machine main body 10 is rotated by a predetermined rotation so as to engage with the engaging portion 13a prior to the engagement of the other lower engaging portion 43b of the agricultural working machine main body 10 with the lower engaging portion 13b of the quick coupler 3. As a result, the pair of left and right lower engaging portions 43a and 43b of the agricultural working machine main body 10 are brought into a pair of corresponding left and right lower engaging portions of the quick coupler 3 from substantially the same ground level. It will engage with the parts 13a and 13b.

That is, the upper engaging portion 42 of the agricultural working machine body 10
When the three-point link hitch portion 2 is further rotated upward in a state where the upper engagement portion 12 of the quick coupler 3 is engaged with the
The front side of the agricultural working machine body 10 is raised upward, and the agricultural working machine body 10 moves slightly forward, and the first caster 65 and the third caster 63 are separated from the ground as shown in FIG. Thereafter, based on the eccentricity of the center of gravity O, the agricultural working machine main body 10 is positioned at a predetermined rotation center axis, that is, after the top pin 46 of the upper engaging portion 42 of the agricultural working machine main body 10 and the heavy load side stand body 61b. FIG. 6 with the second caster 66 at the end
The front side of the agricultural working machine main body 10 rotates about the axis Z shown in FIG.

As a result, the lower pin 49 of the lower engaging portion 43a on the light load side of the agricultural working machine main body 10 moves forward while the corresponding lower engaging portion 13a of the quick coupler 3 moves.
Of the lock arm 27 is guided by the pin guide portion 30 of the
The lower pin 49 is rotated against the urging force of
And engages with the engagement notch 25.

Subsequently, the upper engaging portion 42 of the agricultural working machine body 10 and the upper engaging portion 12 of the quick coupler 3 are engaged, and the lower engaging portion 43a on the light load side of the agricultural working machine body 10 With the corresponding lower engagement portion 13a of the coupler 3 engaged,
When the three-point link hitch 2 is further rotated upward,
The front side of the farm working machine body 10 is raised further in a state where the front side is supported by the lower engagement portion 13a, and
Moves a little forward, and the fourth caster 64 in addition to the first caster 65 and the third caster 63 moves off the ground.

Then, as the fourth caster 64 moves away from the ground, the other lower engaging portion 43b on the heavy load side of the agricultural machine body 10 moves toward the corresponding other lower engaging portion 13b of the quick coupler 3. The lower pin 49 of the other lower engaging portion 43b is moved forward and moves to the corresponding pin guide portion 30 of the other lower engaging portion 13b of the quick coupler 3 while being pulled forward. Guided by the lock arm
27 rotates against the urging force of the spring 28, and the lower pin 49 engages with the engagement recess 29 and engages with the engagement notch 25. When the three-point link hitch 2 is pivoted upward, the input shaft 50 of the agricultural machine body 10 is attached to the tip of a power transmission shaft (not shown).
Are automatically linked.

After the connection of the agricultural machine body 10 to the tractor 1 is completed, the light load side stand body 61a and the heavy load side stand body 61b of the stand device 40 perform the agricultural work so as not to disturb the work by the farm machine body 10. Remove it from the machine body 10 or set it to a different orientation from the normal orientation. In the case where the horizontal plate 71 and the rising bar 72 have a structure in which the length can be adjusted, the lengths of the horizontal plate 71 and the rising bar 72 are appropriately shortened so as not to interfere. .

As described above, according to the above embodiment, when the agricultural machine with the stand is connected to the tractor 1, the three-point link hitch portion 2 of the tractor 1 is pivoted upward, so that the agricultural machine main body 10 is rotated. The upper engaging portion 42 of the agricultural work machine body 10 is engaged with the upper engaging portion 12 of the quick coupler 3. The engaging portions 43a are connected to the corresponding lower engaging portions 13a of the quick coupler 3 by the lower engaging portions 43b, 13a.
So that the main body of the agricultural working machine 10 is rotated by a predetermined rotation center axis, that is, the top pin 46 of the upper engaging portion 42 of the agricultural working machine main body 10 and the rear side of the heavy load side stand body 61b. Is rotated about the axis Z connected to the second caster 66 in the direction in which the front side is raised upward, so that the pair of left and right lower engaging portions 43a and 43b of the agricultural work machine main body 10 are both approximately the same ground clearance. From the center position, the center of gravity O of the agricultural working machine main body 10 is eccentric from the center in the width direction of the agricultural working machine main body 10 because the lower engaging portions 13a and 13b of the quick coupler 3 are sequentially engaged from the position. Also, unlike the conventional,
There is no need to assist the user to prevent tilting.
The connection work of the agricultural work machine body 10 to the main body can be reliably and easily performed, and can be smoothly mounted.

Further, the second caster 66 at the rear end of the heavy load side stand body 61b is disposed at a position behind the fourth caster 64 at the rear end of the light load side stand body 61a. The position of the second caster 66 and the fourth caster 64 are adjusted to match the position of the fourth caster 64 so that the agricultural work machine main body is located at a lower ground level. 10 can be connected to the quick coupler 3.

In the above-described embodiment, the agricultural working machine main body 10 is described as being, for example, a ridge coater main body. However, the present invention is not limited to the ridge coater main body. It is sufficient that the center of gravity O has a structure eccentric from the center in the width direction.

Further, the agricultural work machine main body 10 is
With the first to fourth casters 63, 64, 6
5. Do not apply excessive load to the 66.
As shown in FIG. 7, the first to fourth casters of the stand device 40a can be used to smoothly perform
63, 64, 65, 66, these first to fourth casters 63,
The heavy load side stand body 61b and the light load side stand body 61a may be provided so that 64, 65, and 66 are perpendicular to the grounding surface. That is, in this configuration, the rising rod 72 is perpendicular to the vertical line
The farm work machine main body 10 is erected on the horizontal plate portion 71 at a predetermined angle γ ゜ (for example, about 3 °) so as to be inclined in a direction from one end side to the other end side in the width direction of the farm working machine body 10. It should be noted that the holder 52 may have an inclined shape instead of the rising bar portion 72 having an inclined shape. Also, the first to fourth casters 63, 64, 6
5, 66 is not necessary.

[0058]

According to the first aspect of the present invention, the upper engaging portion of the main body of the agricultural work machine is engaged with the upper engaging portion of the quick coupler by the upward rotation of the three-point link hitch portion of the tractor. When the three-point link hitch portion is further rotated upward, one lower engaging portion on the light load side is connected to the corresponding lower engaging portion of the quick coupler by the other lower engaging portion. The farm work machine body is rotated so that
Since the pair of left and right lower engaging portions of the main body of the agricultural work machine are engaged with the pair of right and left lower engaging portions of the quick coupler from substantially the same ground height position, the center of gravity of the main body of the agricultural work machine is in the width direction of the main body of the agricultural work machine. Even if it is eccentric from the center of
The work of connecting the farm working machine body to the quick coupler can be simplified.

According to the second aspect of the present invention, when the tractor is pivoted upward from the three-point link hitch portion, the agricultural working machine main body is moved backward from the upper engaging portion of the farm working machine main body by the heavy load side stand body. Rotating around the axis connecting the ends with the rotation center axis, the pair of left and right lower engaging portions of the main body of the agricultural work machine are moved from substantially the same ground level to the pair of left and right lower engaging portions of the quick coupler. Since the engagement is performed, even when the center of gravity of the farm working machine main body is eccentric from the center in the width direction of the farm working machine main body, the operation of connecting the farm working machine main body to the quick coupler can be reliably and easily performed.

According to the third aspect of the present invention, the rear end of the heavy load side stand is disposed at a position rearward from the rear end of the light load side stand, so that the rear end is disposed at a position facing each other. In comparison, the agricultural work machine main body can be connected to the quick coupler at a lower ground height position.

According to the fourth aspect of the present invention, when the main body of the agricultural working machine supported by the stand device is connected to the quick coupler attached to the three-point link hitch portion of the tractor through the respective steps, Even if the center of gravity is eccentric from the center in the width direction, unlike the related art, there is no need to assist the agricultural work machine main body from tilting, and the work of connecting the agricultural work machine main body to the quick coupler can be simplified.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an agricultural working machine with a stand according to the present invention.

FIG. 2 is a plan view of the agricultural working machine with the same stand.

FIG. 3 is a front view of the agricultural work machine with the same stand.

FIG. 4 is a perspective view of the agricultural work machine with the same stand.

FIG. 5 is a rear view of the quick coupler attached to the three-point link hitch portion of the tractor.

6A and 6B are explanatory views for explaining the operation of the agricultural working machine with a stand, in which FIG. 6A is a diagram showing the agricultural working machine main body in a state before the upper engaging portion 42 is engaged, and FIG. It is a figure which shows the agricultural working machine main body in the state where the 1 caster 65 and the 3rd caster 63 were separated from the ground, and (c) is a figure which shows the agricultural working machine main body after rotating about the predetermined rotation center axis Z. is there.

FIG. 7 is a front view of a stand device of another embodiment of the agricultural working machine with a stand according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 2 3-point link hitch part 3 Quick coupler 10 Farm working machine main body 12 Upper engaging part of quick coupler 13a, 13b Lower engaging part of quick coupler 40, 40a Stand device 41 Three-point engaging part 42 Upper part of agricultural working machine main body Engaging portions 43a, 43b Lower engaging portions 51a, 51b of agricultural machine main body Stand mounting portion 61a Light load side stand body 61b Heavy load side stand body O Center of gravity Z axis

Claims (4)

[Claims] 1. A quick coupler attached to a three-point link hitch portion of a tractor has an upper engaging portion and a pair of left and right lower engaging portions respectively engaged with a pair of left and right lower engaging portions. A farm working machine main body having a three-point engaging portion at the front and stand mounting portions on both sides, and a center of gravity eccentric from the center in the width direction; and the agricultural working machine attached to both stand mounting portions of the farm working machine main body. An agricultural work machine with a stand, comprising: a stand device for supporting the main body in a state of being lifted from the ground, wherein the agricultural work machine body supported by the stand device is attached to a three-point link hitch portion of the tractor. When the tractor is pivoted upward by the three-point link hitch portion, the upper engaging portion of the agricultural working machine main body is positioned above the quick coupler. The lower engagement portion on the light load side of the agricultural work machine main body is engaged with the engagement portion, and the lower engagement portion on the light load side of the agricultural work machine main body is rotated by the further upward rotation of the three-point link hitch portion of the tractor. The main body of the agricultural working machine is rotated around a predetermined rotation center axis so as to engage with the lower engaging portion of the main body prior to the engagement of the other lower engaging portion. An agricultural working machine with a stand, wherein a pair of lower engaging portions engage with a pair of left and right lower engaging portions of the quick coupler from substantially the same ground level position. 2. A stand apparatus comprising: a heavy load side stand attached to a stand attachment portion provided on one side of a side where the center of gravity of the agricultural work machine main body is eccentric; and a side where the center of gravity of the agricultural work machine main body is eccentric. Comprises a light load side stand attached to a stand attachment portion provided on the other side on the opposite side, wherein the height of the heavy load side stand is larger than the height of the light load side stand. Then, when the tractor is rotated upwardly of the three-point link hitch portion, the agricultural working machine body rotates about an axis connecting the upper engagement portion of the agricultural working machine body and the rear end of the heavy load side stand body. Rotating as a central axis, the pair of left and right lower engaging portions of the agricultural work machine main body are engaged with the pair of left and right lower engaging portions of the quick coupler from substantially the same ground level position. Agriculture with stand according to claim 1 Machine. 3. The agricultural working machine with a stand according to claim 2, wherein a rear end of the heavy load side stand is disposed at a position rearward of a rear end of the light load side stand. 4. A method of connecting an agricultural work machine with a stand to a tractor, wherein the agricultural work machine body supported by the stand device and having a center of gravity eccentric from the center in the width direction is connected to a quick coupler attached to a three-point link hitch portion of the tractor. And 3 of the agricultural working machine main body supported by the stand device.
Locating the upper engaging portion of the quick coupler below the upper engaging portion of the point engaging portion; and rotating the three-point link hitch portion of the tractor upward to thereby move the upper portion of the agricultural working machine main body. Engaging the engaging portion with the upper engaging portion of the quick coupler; and rotating the three-point link hitch portion of the tractor further upward to center the agricultural work machine main body around a predetermined rotation center axis. By rotating the front side of the main body of the agricultural working machine in a direction in which the front side is raised upward, one lower engaging portion on the light load side of the main body of the agricultural working machine is engaged with the corresponding lower engaging portion of the quick coupler. And rotating the three-point link hitch portion of the tractor further upward so that the other lower engaging portion on the heavy load side of the agricultural working machine main body corresponds to the other lower engaging portion of the quick coupler. Method of connecting to the tractor with stand agricultural machine, characterized by comprising a step of engaging as draw towards.