JPH1132558A - Grass-collecting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to slowly move windrows from one direction to another direction of a farm by reciprocating operations. SOLUTION: This grass-collecting machine is installed with a revolution- driving means (a transmission 14) which rotates tine-arms 90 fixed with tines 91 for collecting grass around a vertical shaft installed on the side of a main body frame as a center, a revolving direction-switching means (a first actuator 16) for reversely revolving the rotational direction of the tine arm 90, a shaking means (a vertical shaft, a connecting lever, a cam plate, a guide roller, a horizontal shaft, etc.) which shakes tines 91 in the reverse direction against the rotational direction of the tine arms 90 by interlocking with both directions of right and reverse rotations of the tine arms 90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grass harvester for rotating a tine in a horizontal plane to scrape pasture and the like scattered in a field by the tine to form a grass row (wind row), and particularly to rotate the tine. The present invention relates to a grass harvester capable of switching the direction between forward and reverse directions.

[0002]

2. Description of the Related Art In a conventional grass collector, the tine is rotated only in one of a clockwise direction and a counterclockwise direction, and the tine is pulled by a tractor or the like. A row of grass is formed on one of the two.

Here, in an inclined field, it is difficult to pick up a row of grass and load it into a wagon or the like or pack it in a roll with a round baler. Grass row is gradually moved to the lower field, and grass is collected on a flat field connected to the lower side.
In some cases, it is desired to perform the loading operation or the packaging operation in this flat field.

[0004]

However, in the conventional grass collector, the tine is rotated in one direction to form a grass row on either the right side or the left side of the tractor or the like. And so on, the grass row could not be moved to the lower side of the cultivated land.

[0005] By reverse rotation of the tine, it seems that the grass row can be moved to the side opposite to the outward path, but since the swinging direction of the tine is determined by a cam mechanism incorporated in the grass collector, Even if the rotation direction of the tine is reversed, the swinging direction is the same as that of the forward rotation, and it does not swing and retreat to avoid the formed grass row, but swings in the direction of sticking into the formed grass row. It cannot be operated normally because it has moved.

[0006] Therefore, in order to move the row of grass in one direction of the field, the tractor or the like is caused to run idle to the starting point, and then the tractor or the like is run while operating the grass collector in the same direction as the outward route. That is, they had to do so-called one-sided work.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a grass collector capable of gradually moving a grass row in one direction of a field by a reciprocating operation.

[0008]

According to a first aspect of the present invention, there is provided a weed harvester comprising: a rotary drive means for rotating a tine arm on which a tine for collecting grass is fixed around a vertical axis provided on a main body frame side; And a swinging means for swinging the tine in a direction opposite to the direction of rotation of the tine arm in conjunction with both forward rotation and reverse rotation of the tine arm.

A cam fixed to the main body frame and arranged substantially concentrically with the longitudinal axis, a cam follower abutting on a cam surface of the cam, and the cam follower and the tine arm; It is preferable that a link lever be provided which is connected to the cam follower and swings in the rotation direction when the tine arm is rotated forward or backward.

[0010] It is preferable that a turning means is provided for turning the cam plate about the axis of the longitudinal axis substantially in conjunction with switching of the rotating direction of the tine arm by the rotating direction switching means.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a grass collector according to an embodiment of the present invention.

As shown in FIG. 1, a grass collector 10 according to the present embodiment forms a grass collection row by scraping grass and the like scattered on the ground connected by a tractor 1.

The weeding machine 10 includes a machine frame 12 connected to the tractor 1 and a weeding device 13 for gathering grass by gathering grass.
, A transmission 14 for transmitting power from the tractor side to the grass collector 13, a gear case 15 for driving the grass collector 13, and wheels 18 for traveling. Reference numeral 16 denotes a first actuator constituting a part of the rotation direction switching means of the present invention, and reference numeral 17 denotes a second actuator constituting a part of the rotating means of the present invention for rotating the cam plate. It is.

The machine casing 12 has a connecting portion 21 connected to the tractor 1 and a hollow shaft 20 protruding from the transmission 14. At the rear end of the connecting portion 21, an engaging portion 22 that engages with a link hidge of the tractor is provided.

The tractor 1 is equipped with a control box 24 for controlling the operation of the grass collector 10 as shown in FIG. 1 (b). Two actuators 16,
17 is controlled.

In the present embodiment, the first and second actuators 16 and 17 are constituted by electric cylinders,
These are the control box 24 and the cable 24a.
And the battery 26 mounted on the tractor is also connected by a cable line 24b. The first and second actuators 16.17 may be hydraulic cylinders. In this case, the hydraulic source of the tractor communicates with the hydraulic cylinder via the control box 24.

At the front of the tractor 1, a pulley 33, which is rotationally driven by a PTO shaft, is mounted as shown in FIG. 2. The pulley 33 is fixed to one end of an input shaft 29 by a belt 32. 30.
The input shaft 29 is housed in a cylindrical member 31 protruding from a transmission case 34 of the transmission 14. A first pinion gear 35 is provided at the other end of the input shaft 29.
Has been fixed. A first intermediate shaft 36 is rotatably supported by the transmission case 34, and a first spur gear 37 is fixed to one end of the first intermediate shaft 36. The first spur gear 37 meshes with the first pinion gear 35. A second pinion gear 40 is fixed to the other end of the first intermediate shaft 36.

A second intermediate shaft 42 is rotatably mounted on the transmission cover, and a second spur gear 43 meshing with the pinion gear 40 is fixed to one end of the intermediate shaft 42. Also, the second intermediate shaft 42 has 2
Bevel gears 44 and 45 are loosely inserted so as to be slidable and rotatable on the outer peripheral surface of the intermediate shaft 42.
A clutch body 47 that rotates integrally with the intermediate shaft 42 is attached to the second intermediate shaft 42 between the shafts 4 and 45 so as to be slidable in the axial direction of the intermediate shaft 42. Clutch body 4
A peripheral groove 47a is formed on the outer peripheral surface of the groove 7. An output shaft 46 for supplying power to the grass collecting device 13 is rotatably arranged in the hollow shaft 20 attached to the transmission case 34, and a bevel pinion gear 48 is fixed to a tip end of the output shaft 46. The bevel pinion gear 48 is meshed with both bevel gears 44 and 45.

As shown in FIGS. 4 and 5, a rotary shaft 49 is provided through the upper wall of the transmission case 34, and the transmission case 34 of the rotary shaft 49 is provided.
A plate 50 is fixed in a cantilevered state to an inner end of the plate. A pin 52 projects from the tip of the plate 50, and is housed in the circumferential groove 47 a of the clutch body 47. A plate 53 is fixed in a cantilevered state to an end of the rotary shaft 49 outside the transmission case 34, and a cylindrical boss 54 is rotatable around an axis perpendicular to the plane of the drawing at the tip of the plate 53. Attached to.

The first actuator 16 includes the grass collecting apparatus 1.
3 is switched, and is fixed to the machine frame 12 by bolts 63. First actuator 1
An operation rod 57 is attached to the piston rod 56 by inserting and pinning a cylindrical attachment portion 57a formed at the base end thereof. The boss 54 is inserted into the operation rod 57. A screw portion is formed at the tip of the operating rod 57, and a nut 59 is screwed into the screw portion. Between the nut 59 and the boss 54 and the boss 5
Compression springs 60 and 61 are interposed between the mounting member 4 and the mounting portion 57a.

As shown in FIG. 3, a boss 66 is integrally formed at the center of the gear case 15, and a longitudinal axis 68 is rotatably supported by the boss 66. A cylindrical bearing member 71 is supported on the outer periphery of the boss 66 via a bearing 70, and a bevel gear 72 is fixed to the bearing member 71. In the gear case 15, a pinion gear 64 formed at an end of the output shaft 46 on the side opposite to the transmission is located, and the pinion gear 64 is engaged with the bevel gear 72.

A disk member 73 is concentrically fixed to the lower surface of the bearing member 71, and a plurality of brackets 74 are fixed to the lower surface of the disk member 73 at predetermined intervals in the circumferential direction. A longitudinal axis 76 is rotatably attached to each bracket 74 via a bearing 75. A miter gear 78 is fixed to the lower end of the vertical axis 76, and a connecting lever 80 is fixed near the upper end in a cantilever state. A guide roller (corresponding to a cam follower of the present invention) 81 that comes into contact with a cam groove 84 of a cam plate 83 described later is rotatably attached to a distal end portion of the connection lever 80. A horizontal shaft 85 is rotatably attached to the disk member 73 via bearings 88 and 89. A miter gear 86 meshing with the miter gear 78 is provided at an end of the horizontal shaft 85.
Has been fixed. A tine arm 90 is connected to the other end of the horizontal shaft 85 as follows.

That is, a locking plate 93 is fixed near the end of the horizontal shaft 85, a locking member 94 is fixed to the tine arm 90, and the locking member 94 is inserted into a through hole 93 a formed in the locking plate 93. And a locking pin 95 is inserted into a through hole 94a formed in the locking member 94 to connect the two.

As shown in FIG. 2, a plurality of tines 91 are fixed to each tine arm 90 so as to be substantially perpendicular to the axis of the tine arm 90. The tine 91 is fixed so as to hang vertically downward from the tine arm 90 when the connecting lever 80 faces the center axis O of the cam plate 83. The tine 91 is manufactured by bending a wire, and a coil portion 91a is formed at an end on the tine arm 90 side to allow deformation of the tine when an excessive load is applied.

As shown in FIG. 3, a cam plate 83 is fixed to an intermediate portion of the longitudinal axis 68 by a pin 96. Cam plate 83
6 or 8, a cam groove 84 having a circumferentially continuous cam surface 84a is formed.

An operation boss 100 is placed on the upper end of the vertical axis 68, and the operation boss 100 is fixed to the vertical axis 68 by a pin 101. A lever 103 protruding in the radial direction is fixed to the operation boss 100 in a cantilever state. Lever 1
The piston rod 102 of the second actuator 17 is connected to the tip of 03. Second actuator 1
7 is connected to an L-shaped bracket 106 fixed to the hollow shaft 20 by a bolt 105.

The shape of the cam groove 84 of the cam plate 83 will be described with reference to FIGS. FIG. 6 or FIG.
Corresponds to the case where the tine arm 90 is rotated forward or backward, respectively.

A dashed line B in the drawing indicates a center line of the cam groove 84 formed in the cam plate 83, and a two-dot chain line C indicates a rotation locus of the center axis of the vertical shaft 76 to which the miter gear 78 is fixed. The rotation locus indicated by the two-dot chain line C is a circle centered on the axis O of the vertical axis 68. The cam groove 84 is formed symmetrically with respect to the symmetry line D in the figure. In the drawings, “traveling direction” indicates the traveling direction of the tractor or the like, and “rotation direction” indicates the rotating direction of the tine arm 90.

FIG. 6 shows a case where grass and the like are collected on the right side with respect to the traveling direction. The symmetry line D is at a predetermined angle α counterclockwise with respect to the traveling direction.
Incidentally, in the case of FIG. 6, α is 20 °.

If the intersection of the symmetrical line D and the rotation locus C of the vertical shaft 76 on the traveling direction is C1, and the intersection of the symmetrical line D and the center line B of the cam groove 84 on the traveling direction is B1, C1 and B1
Is the longest distance. The distance between C1 and B1 depends on the axis of the vertical shaft 76 and the connecting lever 8.
The distance between the guide roller 81 and the rotation center of the guide roller 81 is the same.

In the present embodiment, the distance between the one-dot chain line B and the two-dot chain line C (the line segment passing through the O point B line and C
The length cut by the line) is the same as the distance between the axis of the vertical shaft 76 and the center of rotation of the guide roller 81 attached to the connecting lever 80. That is, a point at which the dash-dot line B intersects with the direction orthogonal to the traveling direction is P, a point on the dash-dot line B rotated 10 ° clockwise from the point P is S1, and a point rotated 120 ° clockwise from the point S1. Is defined as S2, in the range from the point S1 to the point S2 in the clockwise direction, the distance between the two-dot chain line C that is the rotation locus of the vertical shaft 76 and the one-dot chain line B that is the center line of the cam groove 84 is equal to the vertical axis 76. Is the same as the distance between the center axis of the guide roller 81 and the rotation center of the guide roller 81 attached to the connection lever 80.

The distance between the two-dot chain line C and the one-dot chain line B gradually decreases as the clockwise rotation starts from the point S2, and the distance between the two-dot chain line C and the point B2, C2 on the axis of symmetry D on the opposite side in the traveling direction becomes the smallest. The shape of the cam groove 84 is set so that the distance between the two-dot chain line C and the one-dot chain line B gradually increases as the rotation decreases, and becomes the largest at the point S1.

FIG. 8 shows a case where grass and the like are collected on the left side in the traveling direction.
3 is rotated about a point O so that the symmetrical line D of the cam plate 83 has a predetermined angle β clockwise with respect to the traveling direction. Incidentally, β is 20 °.

The wheel 18 is attached to the lower end of the vertical axis 68. That is, a cylindrical boss 110 is inserted near the lower end of the longitudinal axis 68, and the wheel 1 is located below the boss 110.
A spacer 114 for height adjustment and a locking cylinder 116 for retaining the boss 110 are inserted, and the locking cylinder 116 is fixed to the longitudinal axis 68 by a pin 117. Boss 11
A support shaft 111 is fixed obliquely downward on the side surface of the wheel 0, and a wheel shaft 112 for rotatably supporting the wheel 18 is provided at a lower end of the support shaft 111. A pin 120 protrudes downward and is fixed to the lower portion of the locking cylinder 116.
21 and a tension spring 122. The tension spring 122 urges the support shaft 111 so that the distance between the pin 120 and the protrusion 121 is the shortest. When the grass collector is lifted, the support shaft 111 rotates This is provided to prevent careless rotation.

Next, the operation of the grass collector of this embodiment will be described.

A grass collector is connected to a tractor or the like, and a tine 91 of the grass collector is rotated by rotating a tine arm 90 in a horizontal plane.
The grass and the like scattered in the field are swept together to form a grass collection line.

Here, when collecting grass on the right side in the traveling direction of the tractor, the control lever 25 of the control box 24 is moved rightward. The drive source 26 is controlled to synchronously move the piston rods 56, 102 of the first actuator 16 and the second actuator 17 to the most retracted position.

Here, when the piston rod 56 retracts, the rotation direction of the tine arm 90 is reversed. That is, the operating rod 57 retracts, the boss 54 moves, and the plate 53 swings about the rotation shaft 49. Since the plate 50 is fixed to the rotating shaft 49, the plate 50 swings in conjunction with the retraction of the piston rod 56, and the pin 52 provided at the tip of the plate 50
7 to the second spur gear 43 side, and the clutch body 4
7 is engaged with the bevel gear 45. Accordingly, the rotation of the input shaft 29 is controlled by the first pinion gear 35, the first spur gear 37, the first intermediate shaft 36, the second pinion gear 40,
The power is transmitted to the output shaft 46 via the second spur gear 43, the bevel gear 45, and the bevel pinion gear 48. further,
Bevel pinion gear 64 and bevel gear 72 of output shaft 46
The disk member 73 is driven to rotate through the, and the tine arm 90 attached to the disk member 73 is rotated clockwise in a substantially horizontal plane.

When the piston rod 102 of the second actuator 17 retracts, the longitudinal axis 68 is rotated counterclockwise. That is, when the piston rod 102 retracts, the lever 103 extending from the operation boss 100 rotates counterclockwise about the axis of the longitudinal axis 68 together with the operation boss 100. Since the operation boss 100 is fixed to the longitudinal axis 68 by the pin 101, the longitudinal axis 68 rotates counterclockwise. Since the cam plate 83 is fixed to the longitudinal axis 68 by the pin 96, the cam plate 83 also rotates counterclockwise. As a result, the state of the cam plate 83 is changed from the state shown in FIG. 8 to the state shown in FIG.

With the rotation of the disk member 73, the guide roller 81 attached to the connecting lever 80 moves inside the cam groove 84 while being regulated by the cam groove 84 formed in the cam plate 83, as shown in FIG. Move clockwise.

FIG. 7 shows the movement of the tines 91 at this time.
FIG. 7 shows the rotational movement of the tine arm 90 linearly developed. In FIG. 7, P, S1, S2, and B2 denote P, S in FIG.
1, S2 and B2. Tine arm 9
In the tine 91 fixed to 0, the connecting lever 80
Is set to hang vertically downward from the tine arm 90 when facing the center axis O of
While the guide roller 81 moves from the S1 position to the S2 position, the tine 91 rotates while maintaining the vertically downward state. As a result, the grass and the like scattered on the ground by the tines 91 are scraped by the rotating tines 91 and conveyed to the right in the traveling direction.

After the position S2, the cam groove 84
Is close to the two-dot chain line C which is the rotation locus of the vertical shaft 76, so that the connecting lever 80 attempts to swing about the axial direction of the vertical shaft 76. Here, a row of grass collection is formed ahead of the tine 91 in the traveling direction.
As the tine 91 receives a load from the grass row in the direction opposite to the rotation direction, the tine 91 tends to swing in the direction opposite to the rotation direction of the tine 91. Therefore, when the load exceeds the S2 position, a load acting on the tine 91 causes a load to rotate clockwise on the vertical axis, and the guide roller 81 guided and regulated by the cam groove 84 gradually rotates clockwise. . In other words, the vertical shaft 76 rotating around the point O is guided by the cam groove 84 so that the guide roller 81 follows the vertical shaft 76, whereby the vertical shaft 76 rotates clockwise and is fixed to the tine arm 90. The tine 91 swings in a direction opposite to the rotation direction.

When the position exceeds the position B2, the vertical axis 76
Since the two-dot chain line C, which is the rotation trajectory of the cam groove 84, and the center line B of the cam groove 84 gradually separate from each other, the vertical shaft 76 rotates in the opposite direction, and the tine arm 90 also rotates in the opposite direction. Then, the tine 91 swings so as to gradually return to the vertical direction.

As described above, when the tine arm 90 rotates clockwise, the tine 91 conveys grass and the like from the left side to the right side in the traveling direction.
Is gradually rotated in the retreating direction to release the transportation of the grass and the like, and the grass and the like transported by the tines 91 are gathered in a row on the right side in the traveling direction.

Then, when reaching the end of the field, the grass collector is lifted and the tractor or the like is turned in a U-turn, and the grass collector is lowered and the returning path is advanced while collecting grass.

Here, if the rotation direction of the tine arm 90 is the same as that of the forward path, a row of grass is formed on the right side of the grass collector. Cannot be combined in one direction of the field, but in the grass collector of the present embodiment, the tine arm 90
Can be rotated in the opposite direction to advance while collecting grass to the left in the traveling direction of the grass collector, so that the grass collection line formed on the outward path can be sequentially moved to one side of the field.

That is, after the U-turn, the control lever 25 of the control box 24 is moved counterclockwise to rotate in the opposite direction to the right side. That is, when the control lever 25 is moved to the left rotation side, the piston rods 56 and 102 of the first actuator 16 and the second actuator 17 are simultaneously extended to the maximum extended position.

When the piston rod 56 extends, the rotation direction of the tine arm 90 is reversed. That is, the operating rod 57 moves forward, the boss 54 moves, and the plate 5
3 swings about the rotation shaft 49. The plate 50 swings in conjunction with the extension of the piston rod 56, and the plate 5
0 pin 52 connects the clutch body 47 to the second spur gear 43.
And move the clutch body 47 to the bevel gear 4
4 is engaged. As a result, the rotation of the input shaft 29
, A first spur gear 37, a first intermediate shaft 36, a second pinion gear 40, a second spur gear 43, a bevel gear 44, and a bevel pinion gear 48 to the output shaft 46. As a result, the output shaft 46 is rotated in a direction opposite to that before the control lever 25 is turned to the left. A bevel pinion gear 64 of the output shaft 46,
The disk member 73 is rotated counterclockwise via the bevel gear 72, and the tine arm 90 attached to the disk member 73 is rotated in the opposite direction in a substantially horizontal plane.

When the piston rod 102 of the second actuator 17 extends, the longitudinal axis 68 is rotated clockwise. That is, when the piston rod 102 extends, the lever 103 extending from the operation boss 100 rotates clockwise about the axis of the vertical axis 68 together with the operation boss 100, and the vertical axis 68 rotates clockwise. As a result, the cam plate 83 fixed to the vertical axis 68 is also rotated clockwise. As a result, the state of the cam plate 83 is changed from the state of FIG. 6 to the state of FIG.

As the disk member 73 rotates, the guide roller 81 attached to the connecting lever 80 moves through the cam groove 84 while being regulated by the cam groove 84 formed in the cam plate 83, as shown in FIG. Move counterclockwise.

FIG. 9 shows the movement of the tines 91 at this time.
FIG. 9 is a view in which the rotational movement of the tine arm 90 is linearly developed, and P, S1, S2, and B2 in FIG.
It corresponds to the positions of S2 and B2. It should be noted that in FIG. 9, the rotation direction is reversed from that in FIG.

Tine 91 fixed to tine arm 90
Is set so as to hang vertically downward from the tine arm 90 when the connecting lever 80 faces the central axis O of the longitudinal axis 68, so that the tine 91 is not moved while the guide roller 81 moves from the S1 position to the S2 position. It rotates while maintaining its vertically downward state. As a result, the grass and the like scattered on the ground by the tine 91 rotate to the tine 9
1 and is conveyed to the left in the traveling direction.

After the position S2, the cam groove 84
Is close to the two-dot chain line C which is the rotation locus of the vertical shaft 76, so that the connecting lever 80 attempts to swing about the axial direction of the vertical shaft 76. As in the case shown in FIGS. 6 and 7, a grass row is formed in front of the tine 91 in the traveling direction, and the tine 91 rotates with the rotation of the tine 91.
Receives a load from the grass collection row in the direction opposite to the rotation direction, and thus tries to swing in the direction opposite to the rotation direction of the tines 91. Therefore, when the load exceeds the S2 position, a force acting on the vertical axis rotates counterclockwise due to the load acting on the tine 91, and the guide roller 81 guided and regulated by the cam groove 84 gradually rotates counterclockwise. Let me do.
As in the case shown in FIG. 6, the vertical shaft 76 rotating about the point O is guided by the cam groove 84 so that the guide roller 81 follows. The vertical shaft 76 rotates counterclockwise. The tine 91 fixed to the tine arm 90 swings in the direction opposite to the rotation direction.

When the position exceeds the position B2, the vertical axis 76
Since the two-dot chain line C, which is the rotation trajectory of the cam groove 84, and the center line B of the cam groove 84 gradually separate from each other, the vertical shaft 76 rotates in the opposite direction, and the tine arm 90 also rotates in the opposite direction. Then, the tine 91 swings so as to gradually return to the vertical direction.

As described above, when the tine arm 90 is reversed, the tine 91 conveys grass and the like from the right to the left in the traveling direction, and when the tine reaches the position S2, the tip of the tine 91 gradually rotates in the retreating direction. Thus, the transportation of the grass and the like is released, and the grass and the like transported by the tines 91 are collected in a row on the left side in the traveling direction. Therefore, pasture can be sequentially moved to one side of the field by making a tractor or the like make a U-turn.

By simply reversing the tine arm 90,
There is a case where the timing of the rotation operation of the tine arm 90 and the swing operation of the tine 91 do not coincide with each other, and there is a case where it is not possible to accurately gather the grass by scraping the grass or the like. In the present embodiment, since the cam plate 83 is rotated around the axis of the longitudinal axis 68 by the second actuator 17 in conjunction with the reverse rotation of the tine arm 90, the tine 91 properly scrapes grass and the like. So that the rotation of the tine arm 90 and the swing of the tine 91 can be performed.
Timing can be taken at each rotation position of zero.

Next, a grass collector according to another embodiment of the present invention will be described with reference to FIGS. The same components as those in the above embodiment are denoted by the same reference numerals and described.

In the grass collector of the present embodiment, as shown in FIG.
5 fixed.

A bracket 132 is fixed to the disk member 73, and the cylindrical bearing member 13 is fixed to the bracket 132.
The horizontal shaft 133 is rotatably attached to the bearing member 134. A connecting lever 136 is fixed to a tip of the horizontal shaft 133 in a cantilever state, and a guide roller 137 (corresponding to a cam follower of the present invention) is attached to a tip of the connecting lever 136. The guide roller 137 is inserted into the cam groove 131 of the cam 130.

Here, as shown in FIGS. 11 and 14, the cam 130 has a substantially circular shape in plan view, and the cam groove 131 which is opened laterally on the side surface has a symmetrical shape passing through the axis of the longitudinal axis 68. It is formed continuously in plane symmetry with respect to the plane E. The cam groove 131 is formed by a horizontal portion 131a formed in a range of a predetermined central angle around the axis of the vertical axis 68 (in this embodiment, 1/3 of the entire circumference), and from each end of the horizontal portion 131a. And an inclined portion 131b formed to be symmetrically raised.

FIG. 11 shows a case where grass and the like are collected on the right side with respect to the traveling direction. The symmetry plane E is at a predetermined angle α counterclockwise with respect to the traveling direction. Incidentally, in the present embodiment, α is 20 °.

In the figure, F1 is the position where the horizontal part 131a intersects with the symmetry plane E, and F2 is the position where the inclined part 131b intersects with the symmetry plane E. FIG. 12 shows a state in which the cam 130 is cut along the symmetry plane E, and the axis L of the horizontal shaft 133 is shown.
Is the longest, and the distance is the same as the distance between the axis L of the horizontal shaft 133 to which the connection lever 136 is fixed and the rotation axis M of the guide roller 137. I have. The horizontal portion 131a starts from T1 and ends at T2, and the range of T1 to T2 is a range in which the central angle about the point O is 60 ° left and right with respect to the symmetry plane E. In other words, the cam groove 131 is rotated clockwise 10 ° from a direction perpendicular to the traveling direction to the position T1.
A horizontal portion 131a is formed so as to be the farthest distance from the horizontal axis 133 up to a position T2 rotated 120 ° from the horizontal axis 133,
The inclined portion 131b is formed so that the cam groove 131 gradually approaches the horizontal axis 133 from the position T2, and the cam groove 1 is formed at the position F2.
31 is formed so as to be closest to the horizontal axis 133 and to be gradually distant therefrom toward the position T1.

FIG. 14 shows a case where a row of weeds is formed on the left side in the traveling direction of the tractor or the like. In the state shown in FIG. And the symmetry plane E is rotated clockwise by β with respect to the traveling direction. In the present embodiment, β is 20 °.

The operation of the grass collector according to the present embodiment will be described with reference to FIGS.

When grass is collected on the right side in the traveling direction of the tractor or the like, the first and second actuators 16 and 1 are collected.
7 is retracted to position the cam 130 in the state shown in FIG. As a result, the disk 73 rotates clockwise, and between the positions T1 and T2, the tine 91 fixed to the tine arm 90 maintains a substantially vertical state as shown in FIG. The grass is raked to the right in the direction of travel. After the position T2, the cam groove 131 approaches the horizontal shaft 133, so that the connecting lever 136 tries to swing. However, as in the above-described embodiment, the load is received by the grass-collecting row, and the horizontal shaft 133 moves forward. Connection lever 13
6 swings, and the tine 91 swings in the direction opposite to the rotation direction so as to avoid the row of grass collection.

Next, when grass is collected on the left side in the traveling direction of the tractor or the like, the first and second actuators 1 are used.
By extending 6, 17, the cam 130 is positioned as shown in FIG. As a result, the disc member 73 rotates counterclockwise, and between the positions T1 and T2, the tine 91 fixed to the tine arm 90 maintains a substantially vertical state as shown in FIG. At the same time, the grass is raked to the left in the direction of travel. After the position T2, the cam groove 131 approaches the horizontal shaft 133.
6 tries to oscillate, but receives a load from the grass-collecting row in the same manner as in the previous embodiment, the connecting lever 136 swings so that the horizontal shaft 133 moves ahead, and the tine 91 avoids the grass-collecting row. It swings in the direction opposite to the direction of rotation.

In the grass harvester of this embodiment, similarly to the above-described embodiment, the grass harvesting work is performed by reciprocating in the field and reversing the rotation direction of the tine arm 90 of the grass harvester between the forward path and the return path. Thereby, pasture can be sequentially moved from one side of the field to the other side.

The guide roller 137 is vertically guided by using a three-dimensional cam 130 to connect the connecting lever 136.
Is pivoted in the vertical plane to rotate the horizontal shaft 133 fixed to the connecting lever 136, and to rotate the tine arm 90 connected to the horizontal shaft 133, as in the above-described embodiment. The rotation of the vertical shaft 76 is controlled by the tine arm 90.
It is not necessary to provide the miter gears 78 and 86 for converting the swing into the above-mentioned swing, the number of parts can be reduced, the manufacturing cost can be reduced, and the reliability can be improved.

In the above embodiment, the vertical shaft 76 and the horizontal shaft 85 are connected by the miter gears 78 and 86. However, the vertical shaft 76 and the horizontal shaft 85 are connected to each other as shown in FIG.
7, it may be connected by two hook joints 200, or may be connected by a flexible shaft 210 as shown in FIG.

Further, in the above-described embodiment, an example is shown in which the grass collector is connected to the front of the tractor, but the present invention can also be applied to the case where the grass collector is connected to the rear of the tractor.

[0071]

As described above, according to the present invention, the row of grass can be gradually moved from one direction of the field to the other by the reciprocating operation.

[Brief description of the drawings]

FIG. 1 is a plan view showing a grass collector according to an embodiment of the present invention.

FIG. 2 is a side view of the grass collector shown in FIG. 1;

FIG. 3 is a sectional view showing a main part of the grass collector of FIG. 1;

FIG. 4 is a sectional view showing a main part of the grass collector of FIG. 1;

FIG. 5 is a plan view showing a part of the grass collector of FIG. 1;

FIG. 6 is a view showing the operation of the grass collector of FIG. 1;

FIG. 7 is a view showing the operation of the grass collector of FIG. 1;

FIG. 8 is a view showing the operation of the grass collector of FIG. 1;

FIG. 9 is a view showing the operation of the grass collector of FIG. 1;

FIG. 10 is a cross-sectional view showing a main part of a grass collector according to another embodiment of the present invention.

FIG. 11 is a plan view showing the operation of the grass collector of FIG. 10;

FIG. 12 is a sectional view showing a main part of the grass collector of FIG. 10;

FIG. 13 is a view showing the operation of the grass collector of FIG. 10;

FIG. 14 is a plan view showing the operation of the grass collector of FIG. 10;

FIG. 15 is a sectional view showing a main part of the grass collector of FIG. 10;

FIG. 16 is a view showing the operation of the grass collector of FIG. 10;

FIG. 17 is a sectional view showing still another embodiment of the present invention.

FIG. 18 is a sectional view showing still another embodiment of the present invention.

[Explanation of symbols]

 12 Machine frame 16 First actuator 17 Second actuator 42 Intermediate shaft 44, 45 Bevel gear 46 Output shaft 47 Clutch body 49 Rotation shaft 53 Plate 64 Bevel pinion gear 68 Vertical axis 72 Bevel gear 76 Vertical axis 78, 86 Miter gear 80 Connection lever 81 Guide roller 83 Cam plate 84 Cam groove 85 Horizontal shaft 90 Tine arm 91 Tine 103 Lever 130 Cam 131 Cam groove 133 Horizontal shaft 136 Connecting lever 137 Guide roller

Claims (3)

[Claims] 1. A rotation driving means for rotating a tine arm on which a tine for collecting grass is fixed around a vertical axis provided on a body frame side; a rotation direction switching means for reversing a rotation direction of the tine arm; Swinging means for swinging the tine in a direction opposite to the rotation direction of the tine arm in conjunction with both forward rotation and reverse rotation of the tine arm. 2. A cam fixed to the main body frame and arranged substantially concentrically with the longitudinal axis, a cam follower abutting on a cam surface of the cam, and the cam follower and the tine arm. 2. The grass collector according to claim 1, further comprising: a connecting lever that is connected to each other and swings around the cam follower in the rotation direction when the tine arm is rotated forward or backward. 3. A rotating means for rotating the cam plate about the axis of the longitudinal axis substantially in conjunction with switching of the rotating direction of the tine arm by the rotating direction switching means. 2. The grass collector according to 2.