JP2002272241A - Tea tree straddling type apparatus for tending tea plantation equipped with automatically aligning mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tea tree straddling type apparatus for tending a tea plantation by which a positioning of a tea plantation tending unit accompanied with a change of a gauge width can automatically be performed with an extremely simple structure. SOLUTION: This apparatus 1 for tending a tea plantation equipped with the automatically aligning mechanism is equipped with a running machine unit 2 striding and running over a tea ridge A and the tea plantation tending unit 3 carrying out tending of tea plantation such as a nipping of tea leaves or the like. The running machine unit 2 is formed so that the gauge width can freely be changed to suit different set widths of tea ridges A. On the other hand, the tea plantation tending unit 3 is supported by a displacement support frame 6 capable of displacing in the cross direction of the tea ridge and set so as to always locate at the center of the running machine unit 2 by an automatically aligning mechanism 7 installed between the displacement support frame 6 and the running machine unit 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tea ridge running type tea garden management apparatus for picking tea leaves or performing other tea garden management while running over a tea ridge, and particularly relates to a tailing width of the tea ridge. The present invention relates to a tea ridge running tea garden management device provided with an automatic aligning mechanism capable of obtaining an accurate work posture with respect to the tea ridge and a stable work state even if different.

[0002]

BACKGROUND OF THE INVENTION In recent years, devices have been developed for picking tea leaves or performing other tea garden management while traveling over tea ridges. This device is equipped with a tea plant management unit for picking tea leaves or performing other tea plant management for a traveling machine unit traveling across a tea ridge, and a prime mover serving as a drive source for these units. Of these, a riding-type tea garden management device, in which a worker rides on a traveling machine unit and performs work while maneuvering, has recently become popular.

[0003] Looking at the actual situation of tea gardens, the topography of the tea garden differs from farmer to farmer, and the width of the tea ridges is tailored differently according to the topography or according to the intention of the farmer. At this time, apart from the case of a very large tea plantation, since the tea plantation management unit such as a portable plucking machine has been widely used in the past, even if the tea ridge width is slightly different, the worker can use his own work experience. By making appropriate adjustments based on this, accurate tea garden management work was performed.
However, in the case of using a so-called riding-type tea garden management device that has recently become popular, work efficiency can be significantly improved, but sufficient measures to perform such accurate tea garden management have not been achieved. . In the case of tea gardens, they do not always show their full potential.

[0004] In other words, a riding-type tea garden management apparatus in which the width between gauges can be adjusted so as to allow such a difference in the width of the tea ridge is desired, and development is proceeding. However, at this stage, with the change of the gauge width, it was necessary to reset the tea garden management unit to the center of the traveling machine unit each time. Specifically, in this type of tea garden management device, since the tea garden management unit is supported on the left and right leg frames of the traveling machine unit, the mounting position is adjusted each time the gauge width changes. This has been dealt with by changing the fastening position using bolts and nuts by using a long hole or the like for free configuration.

[0005] Naturally, such work is extremely complicated, and in particular, when it is necessary to change the gauge width for the same tea ridge, the substantial tea garden management work is temporarily interrupted and such a setup work is also called. The above work to be performed must be performed, resulting in a significant decrease in work efficiency. Under such circumstances, the present applicant has already filed a patent application such as Japanese Patent Application Laid-Open No. 10-14356 to solve the problem. However, a structure in which the leg frame is tilted to cope with a change in the gauge width is tilted. Therefore, it is not familiar with the riding type, particularly the crawler type tea garden management device, and leaves room for further improvement.

[0006]

[Technical Problems Attempted to Be Developed] The present invention has been made after recognizing such a background and conducting thorough investigation. The tea garden management unit according to the change of the gauge width has an extremely simple structure. The technical issue was to develop a tea ridge running tea garden management device with a self-aligning mechanism that can automatically adjust the position of the car and can be applied to a riding type and crawler type tea garden management device. It is.

[0007]

According to a first aspect of the present invention, there is provided a tea ridge running type tea garden management apparatus provided with an automatic centering mechanism, wherein the traveling machine unit travels across the tea ridge and plucks tea leaves or other tea gardens. In a device comprising a tea garden management unit for performing management, the traveling machine unit is configured so that the gauge width can be changed so as to correspond to different tailoring widths of the tea ridge, while the tea garden management unit is arranged in the tea ridge width direction. It is supported by a displacement supporting frame that can be displaced, and is set so as to always be located at the center of the traveling machine unit by an automatic alignment mechanism provided between the displacement supporting frame and the traveling machine unit. . According to the present invention, the position adjustment and fixing work of the tea garden management unit, which has been conventionally performed each time the gauge width is changed, becomes unnecessary, and a dramatic improvement in work efficiency can be expected.

According to a second aspect of the present invention, in addition to the above requirements, the displacement supporting frame is movable up and down with respect to the leg frame of the traveling unit. It is characterized by comprising two guide brackets that can be engaged with a lifting bracket provided and that can slide in the width direction of the tea ridge, and an intermediate frame that integrally connects the two guide brackets. According to the present invention, the tea garden management unit can be moved up and down in association with the elevating movement of the elevating bracket, and it can slide in the tea ridge width direction integrally with the displacement support frame,
Position adjustment becomes possible.

Further, in the tea ridge running tea garden management device provided with an automatic centering mechanism according to claim 3, in addition to the above requirements, the automatic centering mechanism is a leg portion of a traveling machine unit accompanying a change in a gauge width. In conjunction with the movement of the frame, the displacement amount and the displacement direction of the displacement support frame are automatically determined based on the moving amount and the moving direction of the leg frame, and the distance to the leg frame at both ends of the displacement support frame is always equal. It is characterized by being displaced as follows. According to the invention,
With an extremely simple structure, it becomes possible to automatically align the displacement support frame and the tea garden management unit supported by the displacement support frame with the movement of the leg frame around the apparatus center of the traveling machine unit.

[0010] Furthermore, the tea ridge running type tea garden management device provided with the self-centering mechanism according to claim 4 is the said claim 2 or 3.
In addition to the requirements described above, the self-aligning mechanism includes an equalizer link rotatably provided around a substantially center of the intermediate frame as a pivot, one end connected to the equalizer link, and the other end connected to a lifting bracket. And a connecting portion between the equalizer link and the equalizer rod is provided at a position opposite to each other at an equal distance across a rotation fulcrum, and two opposing equalizer rods are long. , And are arranged in parallel. According to the present invention, when the leg frame moves, the equalizer link is rotated by a predetermined angle via the equalizer rod according to the amount of movement, and the other equalizer rod connected to the equalizer link is moved up and down at the other end. By pressing against the bracket or pulling the other equalizer rod, the reaction force generated by this makes it possible to move the position of the rotation fulcrum of the equalizer link to the center of the traveling unit unit, making the structure simple. Become.

Further, in a tea ridge running type tea garden management device provided with an automatic centering mechanism according to claim 5, in addition to the above requirements, the traveling machine unit includes a so-called crawler type traveling device to perform tea garden management. It is a riding-type tea garden management vehicle in which a worker who performs the operation actually rides and steers. According to the present invention, in addition to the rail traveling type tea plantation management device, the riding type crawler type tea plantation management device, which has recently become popular, can automatically adjust the tea plantation management unit to the center of the traveling machine unit. Mind becomes possible.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on the illustrated embodiments. Reference numeral 1 denotes a tea ridge crossing type tea garden management device provided with the self-aligning mechanism of the present invention. As shown in FIGS. And a tea garden management unit 3 mounted on the travel machine unit 2 and directly performing tea garden management work such as plucking.

The traveling machine unit 2 includes a frame 20 having a substantially gate shape as viewed from the traveling direction as a machine frame member so that the traveling machine unit 2 can travel across the tea ridge A. The frame 20 includes left and right leg frames 20A positioned so as to stand between the tea ridges A, an upper frame 20B that horizontally connects the upper ends of the leg frames 20A, and a part of the leg frame 20A. And an elevating bracket 20C which is attached so as to be able to move up and down. A traveling device 21 using a crawler is provided at the lower end of the leg frame 20A as an example. Of course, the traveling device 21 is not limited to the one to which such a crawler is applied, and a pneumatic tire that does not excessively press the field between the tea ridges A, or a rail when the rails are laid between the tea ridges A, Appropriate means such as rolling wheels can be used. In addition to the riding type, the traveling unit 2 may be of a self-propelled type by automatic driving, of course. A detailed description of the lifting / lowering shift mechanism of the lifting / lowering bracket 20C is omitted, but as an example, a configuration in which the screw shaft is rotated by operating a hand-operated type handle 200 provided on the top of the leg frame 20A to perform the lifting / lowering operation. Take.

A cockpit 22 is provided above the upper frame 20B, and a control box 23 for maneuvering is provided on the front surface thereof. A motor 24 to which a diesel engine or the like is applied, for example, is mounted near the cockpit 22. As an example, a hydraulic pump (not shown) is driven by the motor 24, and an operation supplied by the hydraulic pump is performed. A cylinder (shown in the drawing) used to drive the driving of the traveling device 21 and the tea garden management unit 3 by oil, for example, the drive of the cutting blade 30 if it is a plucking machine, and the lifting shift of the lifting bracket 20C. Drive).

Furthermore, in the embodiment shown in the drawings, since a plucking machine is applied as an example of the tea garden management unit 3, a fan for blowing the picked tea leaves A (the same reference numeral as that of the tea furrow A) is blown. 25 is provided on the upper frame 20B, and is driven by the rotation of the prime mover 24 as an example. And duct 26 from fan 25
Is supplied to the tea garden management unit 3 side via the.
Reference numeral 26A denotes a flexible duct that constitutes a part of the duct 26, which is set at an appropriate height according to the height of the tea ridge A by the tea garden management unit 3 as described later. This is a necessary configuration so as to cope with a change in position. When the tea garden management unit 3 in which the engine and the fan are mounted on the plucking machine itself is used, it goes without saying that the members such as the motor 24, the fan 25, and the duct 26 are not essential components.

The tea garden management unit 3 includes a plucking machine,
A pruning machine, a chemical spraying machine, or the like can be applied. Of these, the main members when a plucking machine is applied will be described. First, reference numeral 30 denotes the aforementioned cutting blade, which is a long rod combined with two upper and lower pairs. A so-called clipper-type cutting blade, in which a large number of teeth are formed on a shaped member and the pair of upper and lower cutting blades are reciprocally slid to perform plucking, can be applied as an example. Of course, the cutting blade applied here does not have to be such a so-called clipper-type blade, and may be, for example, a rotary-type rotary blade. When the cutting blade 30 is driven, the cutting blade 30 can be driven by receiving the power from the hydraulic motor driven by the prime mover 24 mounted on the upper frame 20B as described above. It can be said.

An air supply pipe 31 having a large number of branch pipes is provided above and in front of the cutting blade 30. At the time of the plucking operation, the transfer air generated by the fan 25 is supplied from the air supply pipe 31 to transfer the tea leaves A backward. A guide frame 32 is provided directly behind the cutting blade 30, and a tunnel-shaped guide cylinder 33 is provided so as to surround the guide frame 32 as a lower surface member. Further, behind the guide cylinder 33, a displacement support frame 6 and a tunnel-shaped relay cylinder 35, which are one of characteristic features of the present invention described later, are provided.

Although a detailed description of the lifting brackets 20C on the left and right sides of the relay cylinder 35 is omitted, rollers 201 are provided as appropriate, and the rollers 201 are configured to roll and contact along the leg frame 20A. Moves up and down in such a state that the whole is pulled up by a chain or the like. The displacement support frame 6, which is a characteristic configuration of the present invention, is attached to the lifting bracket 20C, and the self-aligning mechanism 7 is connected.

Such a relay cylinder 35 has a partition at the center in the width direction, and a large number of hooks 36 are attached to each rear opening end as an example.
The two tea bags 5 are connected to the hook 3 so that
6 are locked. A bag stand 37 for receiving the tea bag 5 is provided further behind such a relay cylinder 35.
In addition, since the bag stand 37 itself protrudes greatly rearward with respect to the main body of the traveling unit 2, it is easily attached to and detached from the displacement support frame 6 described later in consideration of the convenience of storage or detachment. It is configured to be supported by a simple support structure and a storage structure of a type that jumps upward.

Next, a description will be given of the displacement support frame 6 and the self-centering mechanism 7, which are characteristic structures of the present invention, which are mounted on the tea ridge running type tea garden management apparatus 1 constructed as described above. The displacement support frame 6 is slidably provided in the width direction of the tea ridge by using an elevating bracket 20C which is provided to be vertically movable with respect to the left and right leg frames 20A of the traveling machine unit 2. As a configuration, two guide brackets 60 provided at both ends, and these guide brackets 60
And an intermediate frame 65 that connects them together. The guide bracket 60 is a box-shaped member having an open outer end face and a bottom face, and a cutout 61 for receiving the leg frame 20A is provided on the upper surface. The guide bracket 60 is the lifting bracket 20.
C is placed from above so as to cover the upper and lower surfaces of the lifting bracket 20C so that the front and rear sides and the upper end surface of the lifting bracket 20C can slide (displace) in the width direction of the tea ridge.
Is engaged. Of course, the displacement support frame 6 and the elevating bracket 20C only need to be configured so as to be able to relatively move toward and away from each other, and are not limited to the sliding contact engagement as described above. The displacement support frame 6 may be suspended from the elevating bracket 20C via the like.

The intermediate frame 65 is formed by using a square steel pipe as an example, and bending the central frame to be slightly higher in accordance with the shape of the relay cylinder 35 attached to the tea garden management unit 3. Further, a support post 66 that stands up is provided at the center of the intermediate frame 65,
Between this support post 66 and the above-mentioned bag base 37, a link-type storage structure 67 for flipping up the bag base 37 upward.
Is provided. The guide bracket 60 has a bag base 37.
A support stay 62 for rotatably supporting the bag base 37 is provided as a support structure, and a hanging chain 63 is provided rearward as an auxiliary member for maintaining the horizontal posture of the bag base 37. A support bracket 64 for supporting the tea garden management unit 3 is provided in the front.

The self-aligning mechanism 7 is provided between the displacement support frame 6 thus constructed and the lifting bracket 20C of the traveling machine unit 2. The self-aligning mechanism 7 is interlocked with the movement of the leg frame 20A in the direction of the ridge width of the leg unit 20A in the traveling machine unit 2 due to the change in the gauge width, and is automatically displaced based on the moving amount and moving direction of the leg frame 20A. This is a mechanism for determining the amount of displacement and the direction of displacement of the support frame 6 and for centering the displacement support frame 6 and thus the tea garden management unit 3 so that the distance between the two ends of the displacement support frame 6 and the leg frame 20A is always equal.

Specifically, an equalizer link 70 rotatably provided around a support post 66 provided at the center of the intermediate frame 65 of the displacement support frame 6 as a rotation fulcrum O, and one end connected to the equalizer link 70 And the other end of the lift bracket 2 of the traveling unit 2
Basically, it is provided with a pair of left and right equalizer rods 71 connected to a connection bracket 202 rising upward from 0C. The equalizer link 70 is, for example, a rectangular flat plate-shaped member, and a connecting portion P with the equalizer rod 71 is provided at a position at the center, which is a rotation fulcrum O, at equal distances across the rotation fulcrum O. . On the other hand, the equalizer rod 71 is a round bar-shaped member as an example, and the equalizer link 7 is provided at both ends thereof.
0 and the connecting portion 7 with the connecting bracket 202
2 are provided rotatably. The two opposing equalizer rods 71 have substantially the same length and are arranged in parallel.

The pivot O of the equalizer link 70
Is preferable in that it can be provided at the complete center of the intermediate frame 65 in that the left-right balance on the dimensional surface and the operating surface of the equalizer rod 71 can be easily obtained.
As described above, the rotational fulcrum O of the equalizer link 70 may be set at a position deviated from the center of the intermediate frame 65 depending on the positional relationship with the support post 66. In this case, the self-aligning function sufficiently functions. .

Next, regarding the operation state of the tea ridge running type tea garden management device 1 having the self-centering mechanism of the present invention configured as described above, the gauge width by the displacement support frame 6 and the self-centering mechanism 7 will be described. The operation state at the time of change will be mainly described. (i) When the gauge width is increased When the gauge width is increased, for example, when only the right leg frame 20A moves outward as shown in FIG.
With the movement of the leg frame 20A, the leg frame 20A
Also moves by the same amount in the same direction. When the lifting bracket 20C moves, the connecting portion 72 of the equalizer rod 71 in the self-aligning mechanism 7 is pulled outward, and the equalizer link 70 is rotated clockwise in the drawing. When the equalizer link 70 rotates, the other equalizer rod 71 is moved so as to press against the other lifting bracket 20C. Then, the entire displacement support frame 6 is moved by a predetermined displacement amount in the moving direction of the leg frame 20A by a reaction force from the lifting bracket 20C accompanying the pressing.

The displacement of the displacement support frame 6 is about half of the displacement of the leg frame 20A. That is, since the distance between the rotation fulcrum O and the connecting portion P is equal, the length of the equalizer rod 71 is equal, and the equalizer rods 71 are always kept parallel, the rotation of the equalizer link 70 is maintained. Since the fulcrum O always tries to be located in the middle of the left and right lifting brackets 20C, the displacement of the displacement support frame 6 is
This is about half of the moving amount of A. . When the left and right leg frames 20A move so as to spread symmetrically, the displacement support frame 6 does not move because the rotation fulcrum O of the equalizer rod 70 remains at the same position. Also,
When the left and right leg frames 20A move by different amounts at the same time, the displacement support frame 6 is moved by the difference in the reaction force accompanying the movement.
And the direction of movement are determined.

(Ii) Reduction in gauge width When the gauge width is reduced, for example, when only the right leg frame 20A moves inward as shown in FIG.
With the movement of the leg frame 20A, the leg frame 20A
Also moves by the same amount in the same direction. When the lifting bracket 20C moves, the connecting portion 72 of the equalizer rod 71 in the self-aligning mechanism 7 is pressed inward, and the equalizer link 70 is rotated counterclockwise in the drawing. When the equalizer link 70 rotates, a pulling force acts on the other equalizer rod 71. The lifting bracket 20 associated with this pulling force
By the reaction force from C, the entire displacement support frame 6 is moved by a predetermined displacement amount in the moving direction of the leg frame 20A.

The displacement of the displacement support frame 6 is about half of the displacement of the leg frame 20A. That is, since the distance between the rotation fulcrum O and the connecting portion P is equal, the length of the equalizer rod 71 is equal, and the equalizer rods 71 are always kept parallel, the rotation of the equalizer link 70 is maintained. Since the fulcrum O always tries to be located in the middle of the left and right lifting brackets 20C, the displacement of the displacement support frame 6 is
This is about half of the moving amount of A. When the left and right leg frames 20A move so as to be narrowed symmetrically, the displacement support frame 6 does not move because the rotation fulcrum O of the equalizer rod 70 remains at the same position. When the left and right leg frames 20A move by different amounts at the same time, the displacement amount and the moving direction of the displacement support frame 6 are determined by the difference in the reaction force accompanying the movement.

[0029]

[Other Embodiments] A tea ridge running type tea garden management apparatus 1 having an automatic centering mechanism according to the present invention is based on the above-described configuration. Changes in the partial configuration as described are also possible. For example, as an engagement structure between the guide bracket 60 in the displacement support frame 6 and the lifting bracket 20C in the traveling unit 2, a simple sliding contact with a surface, a rolling contact type in which a support roller or a roller is interposed, or a guide is used. Various configurations such as an engagement type using a rail and a slider and a fitting type using a shaft and a bearing can be adopted.

The shape of the equalizer link 70 in the self-centering mechanism 7 is not limited to a rectangular flat plate shape, but may be a disk shape, a bar shape or a block shape. As another embodiment in which the structure of the self-aligning mechanism 7 is changed, a magnet 80 is provided between the lifting bracket 20C and the guide bracket 60 as shown in FIG. 6B, a guide rod 81 is provided between opposing lifting brackets 20C, and the displacement support frame is loosely fitted to the guide rod 81 as shown in FIG. 6B. 6 and lifting bracket 20C
Compression coil spring 8 between
2, the displacement support frame 6 can be centered by contracting.

Although not shown, the use of a rack and pinion and an appropriate gear train allows the leg frame 20A to be used.
It is also possible to adopt a configuration capable of converting the amount of movement of the first direction into the amount of displacement of about half in the same direction. Further, in this case, it is of course possible to adopt a configuration using a chain and a sprocket, a timing belt and a timing pulley, a wire and a pulley, and a balancer weight instead of the rack and pinion.

[0032]

According to the present invention, it is not necessary to correct the mounting position of the tea garden management unit 3 due to the change of the gauge width, which has been conventionally troublesome, and the working efficiency can be greatly improved. In addition, since the center of the tea garden management unit 3 is automatically adjusted in conjunction with the movement of the leg frame 20A, the temporary work is interrupted even when the gauge width is changed during the tea garden management work. Without changing the distance between the gauges of the leg frame 20A and the centering of the tea garden management unit 3, two different operations can be simultaneously performed.
Further, the structure of the self-aligning mechanism 7 is relatively simple, and does not become an obstacle even when applied to a riding-type tea garden management device. In addition, since the leg frame 20A is configured to move horizontally, a traveling device 21 other than a rail traveling type such as a crawler type is used.
Of course, it is also possible to apply to the traveling machine unit 2 including

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state of a tea ridge running type tea garden management device provided with an automatic centering mechanism of the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view showing an operation state in a case where a gauge width is increased.

FIG. 5 is a plan view showing an operating state when the gauge width is reduced.

FIG. 6 is a plan view showing another two embodiments in which the configuration of the self-aligning mechanism is different.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tea ridge running type tea garden management device 2 Traveling machine unit 3 Tea garden management unit 5 Tea bag 6 Displacement support frame 7 Self-centering mechanism 20 Frame 20A Leg frame 20B Upper frame 20C Elevating bracket 21 Traveling device 200 Handle 201 Roller 202 Connecting bracket Reference Signs List 22 cockpit 23 control box 24 prime mover 25 fan 26 duct 26A flexible duct 30 cutting blade 31 air duct 32 guide frame 33 guide cylinder 35 relay cylinder 36 hook 37 bag stand 60 guide bracket 61 cutout 62 support stay 63 suspension chain 64 Support bracket 65 Intermediate frame 66 Support post 67 Storage structure 70 Equalizer link 71 Equalizer rod 72 Connecting part 80 Magnet 81 Guide rod 82 Compression coil spring A Tea ridge ( Leaf) O pivot point P connecting portion

Claims (5)

[Claims] 1. A device comprising a traveling machine unit traveling over a tea ridge and a tea garden management unit for picking tea leaves or performing other tea garden management, wherein the traveling machine unit can cope with different tailoring widths of the tea ridge. The track width is configured to be variable as described above, while the tea garden management unit is supported by a displacement support frame that can be displaced in the tea ridge width direction, and a self-centering provided between the displacement support frame and the traveling machine unit. A tea ridge running type tea garden management device provided with an automatic centering mechanism, which is set so as to be located at the center of the device of the traveling machine unit by a mechanism. 2. The guide frame according to claim 1, wherein the displacement support frame is engaged with a lifting bracket provided to be able to move up and down with respect to a leg frame of the traveling unit, and two guide brackets slidable in the width direction of the ridge. The tea ridge running type tea garden management device with an automatic centering mechanism according to claim 1, further comprising an intermediate frame that integrally connects the base guide brackets. 3. The self-centering mechanism interlocks with a movement of a leg frame in a traveling machine unit accompanying a change in a gauge width,
The displacement amount and displacement direction of the displacement support frame are automatically determined based on the moving amount and moving direction of the leg frame,
3. The tea ridge running type tea garden management device provided with the self-aligning mechanism according to claim 1, wherein the displacement support frame is displaced so that the distance between the both ends of the displacement support frame and the leg frame is always equal. 4. The self-aligning mechanism comprises an equalizer link rotatably provided substantially at the center of the intermediate frame as a rotation fulcrum, one end connected to the equalizer link, and the other end connected to a lifting bracket. It is provided with a pair of left and right equalizer rods, and a connecting portion between the equalizer link and the equalizer rod is provided at a position opposite to each other at an equal distance across a rotation fulcrum, and two opposing equalizer rods have a length. The tea ridge running tea garden management device provided with a self-aligning mechanism according to claim 2 or 3, wherein the tea ridge running type tea garden management device is arranged in parallel. 5. The tea machine according to claim 1, wherein the traveling machine unit comprises a crawler-type traveling device, and is a riding-type tea garden management vehicle in which a worker who performs tea garden management actually rides and steers. A tea ridge running type tea garden management device comprising the self-centering mechanism according to 2, 3, or 4.