JP2002315419A - Tea field working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tea field managing machine, applicable to works such as picking, pruning and pest control while running along tea ridges and produced at a low cost by simplifying the lifting mechanism of a lift installing the working machine. SOLUTION: This tea plantation tending machine has a prop of its machine body and a lift body enfolding the prop and is simplified its mechanism by that the lift body or the prop is composed of a sliding plate of a low friction factor and the lift body is lifted along the prop.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for raising and lowering a work tool attached to a tea garden management machine for managing tea gardens such as plucking, pruning, cutting and pest control while traveling in a tea garden. The above-mentioned tea garden management machine includes a riding type that travels in a furrow using a traveling device using an endless transport zone, and a rail traveling type that travels on a rail laid in a furrow.

[0002]

2. Description of the Related Art As a typical example of a tea garden management machine, a tea leaf plucking machine will be described.
Japanese Utility Model Publication No. 7-39392 and Japanese Patent Application Laid-Open No. 10-262434. The former is for a rail-running plucker and the latter is for a riding plucker, both of which use the same system with respect to the device for raising and lowering the working implement. In these, a guide rod for elevating is provided along a support, and the guide rod is sandwiched by four rollers to prevent a swing of the elevating body. Further, a screw rod is provided inside the column, and by rotating the screw rod, the elevating body attached to the female screw side is moved up and down, and the plucking device attached to the elevating body is moved up and down. The plucking device has a tea bag support frame at the rear, which also moves up and down integrally with the plucking device. Therefore, in order to support the tea bag support frame, an elevating frame with a roller mounted around the column is provided using the rear column as a guide, and the elevating frame serves as a steady rest of the tea bag support frame.

[0003]

As described above, the conventional one requires a guide rod separately from the support of the body in order to guide the vertical movement of the elevating body.
It is necessary to attach two rollers to the lifting body. The guide rod must be provided completely parallel to the column. Further, in order to drive up and down, a precision member such as a screw rod and a female screw which accumulates the screw rod is required. In addition, there is a difficult work of embedding the screw rod inside the column, and the column must be cut out in order to connect the elevating body with the female screw, so that the strength of the column is weakened. A rotating shaft is mounted horizontally to connect the above-mentioned lifting mechanism using the screw rods provided on the left and right supports of the gate formwork, but a bevel gear is required at the connection to change the rotation direction to a right angle. And In order to support the tea bag support frame, the lifting frame provided on the rear support column does not have a drive mechanism for lifting, so it will move up and down by the force of the screw rod provided on the front gate frame, In this case, there are many problems, for example, a force is generated to pry the tea bag support frame connecting the front and rear elevating frames, the front and rear columns, the elevating guide, and the like. SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive elevating device which has a simple structure and does not generate excessive force.

[0004]

In order to solve the above problems, according to the first aspect of the present invention, there is provided a gate-shaped body extending over a tea ridge and a tea garden management machine having a traveling device at a lower part of the body.
A means is used in which an elevating body is provided so as to enclose the pillars constituting the body and is slid up and down along the pillars. In this case, since the column itself that forms the portal frame serves as a guide for the elevating body, there is no need to provide a guide rod separately from the column. Since the elevating body is formed so as to enclose the column, there is no need for four guide rollers provided on the elevating body as in the related art. Since there is no need to cut the strut itself, the strength of the strut is not reduced.

According to a second aspect of the present invention, there is provided means for attaching a member having a low friction coefficient to the elevating body. With this configuration, even if a large force is applied to the lifting / lowering body, the lifting / lowering body can be smoothly moved up and down with a small force. Unlike a conventional guide roller, a force is received by a flat member, not by a single point, so that a greater force can be received without difficulty.

According to a third aspect of the present invention, a means is used in which a member having a low coefficient of friction is attached to a column on which the elevating body slides up and down. According to the second aspect, a member having a small friction coefficient is provided on the lifting / lowering body side. However, the same effect can be obtained by providing the member on the support side as in the third aspect.

According to a fourth aspect of the present invention, a means is provided in which sprockets are provided above and below the column, a chain is stretched along the column, and the elevating body is connected with the chain to move up and down. This eliminates the need for a screw rod for raising and lowering and a female screw. In the case of a screw rod, it must be provided exactly parallel to the lifting guide, but if it is moved up and down with a chain, as in the present invention, the chain is flexible, and the column that guides the lifting body, There is no need to put it out. In the combination of the screw rod and the female screw, it is necessary to rotate the screw rod at high speed in order to obtain the vertical speed of the elevating body. For this reason, the friction of the screw portion is severe, and it is necessary to supply oil to the screw portion. With chain drive, the vertical speed of the elevating body can be obtained simply by turning the sprocket slowly.

According to the fifth aspect of the present invention, the above-mentioned vertical mechanism is provided on the left and right columns of the portal frame forming the body, the sprocket provided on the upper part is connected by a rotating shaft, and a worm wheel is provided on the rotating shaft. The worm gear integrated with the worm gear is turned by the handle, and the left and right elevating bodies are simultaneously moved up and down. This eliminates the necessity of a conventional bevel gear for connecting a lifting shaft provided on the left and right columns and a rotating shaft horizontally laid on the portal frame as in the related art. If the speed reduction ratio between the worm and the worm wheel is set to an appropriate value, a self-locking function for stopping at that position occurs, so that the elevating body does not lower due to gravity.

According to the invention of claim 6, sprockets are provided above and below each of the four front, rear, left and right columns constituting the body.
A chain is stretched along each column, a lifting body that goes up and down along each column is provided, a sprocket provided at the top of the left and right columns in front is connected by a rotating shaft, and a sprocket provided at the bottom of the left and right columns is attached on the left side. The lower sprocket of the left rear support and the right sprocket are connected to the lower sprocket of the right rear support by a power transmission mechanism, respectively, so that the four elevating bodies of front, rear, left and right are simultaneously moved up and down. In this way, the work beams such as the plucking device and the tea bag holding frame are supported at the four points of the two elevating bodies of the front strut and the two elevating bodies of the rear strut.
An unreasonable force is not generated when moving up and down, and it is possible to widen the space between the front and rear struts. Since the elevating mechanisms provided on the front and rear columns are connected by sprockets below each column, the upper part of the body frame can be used freely without interfering with the devices provided on the upper part of the body frame.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, description will be made based on embodiments. FIG. 1 is a side view of a riding type tea leaf picking machine which is a typical example of the tea garden management machine of the present invention, and FIG. 2 is a plan view. FIG. 3 is a front view. Reference numerals 1 and 2 denote traveling devices using an endless transport zone.
The left and right traveling devices are connected by a gate form 3. Elevating bodies 5 and 7 that move up and down along the columns are provided on the columns 11 and 13 at the front. The rear posts 12, 14 are provided with elevating bodies 6, 8, which move up and down along the posts. A picking machine 9 is mounted on the lifting bodies 5 and 7
Install. A tea bag holding frame 10 is attached to the lifting members 6 and 8. The plucking machine 9 and the tea bag holding frame 10 are connected to each other and are integrated.

The details of the elevating body will be described with reference to FIGS. FIG. 4 is an enlarged view of a portion of the column 11 and the column 12 of FIG. 2, and FIG. 5 is a diagram of FIG. 4 viewed from a side. The elevating body 5 is provided so as to surround the front half of the front column 11, and moves up and down along the column 11. Also, the back column 1
An elevating body 6 is provided so as to enclose the rear half of 2, and moves up and down along columns 12. The lifting body 5 has a support 1
A sliding plate 15 is attached to a sliding portion between the sliding plate 1 and the sliding plate 15. A sliding plate 16 is attached to the elevating body 6 at a portion where the elevating body 6 slides with the column 12. The sliding plate may be any member as long as it is a member having low frictional resistance (fluororesin, polyethylene, etc.). Front strut 11
A sprocket 19 is provided on the upper part, and a sprocket 19 is provided on the lower part, and a chain 25 is stretched. The end of the chain 25 is connected to the lifting body 5. The lifting body 5 supports a plucking machine 9. At the top of the rear column 12, a sprocket 24,
A sprocket 23 is provided at the lower part, and a chain 27 is stretched, and is connected to the elevating body 6. The lifting body 6
The tea bag holding frame 10 is supported.

At the upper part of the left and right columns at the front, left and right sprockets 19 and 28 connected to the lifting chain are provided, and are connected by a rotary shaft 41. Rotating shaft 41
Is provided with a gear box 42 in which a worm wheel and a worm gear are combined, and is connected to an upper handle 43. The handle 43 is provided at a position where the operator 37 can reach from the driver's seat 38. A motor 44 is provided below the opposite side of the handle 43. The lower sprocket on each column is 2
It is overlapping. Sprocket 20 below left front column
A sprocket 21 is provided on the outer side of the sprocket 23, and a sprocket 22 is provided on the outer side of the sprocket 23 below the left rear column. A sprocket 30 is provided outside the sprocket 29 below the right front column, and a sprocket 31 is provided outside a sprocket 32 below the right rear column. The sprocket 31 is connected by a chain 35 (lower right).

Next, the method of use will be described. When the operator 37 reaches out of the driver's seat 38 and turns the handle 43, the rotating shaft 41 rotates, the sprockets 19 and 28 at both ends of the rotating shaft 41 rotate, and the sprockets 20 and 29 on the lower side of the column are rotated. Chain 25, 3
4, the lower double sprockets 20, 21, 29,
30 rotates. Furthermore, the chain 26 passed back and forth,
35, the rear sprocket lower double sprockets 22, 23,
31 and 32 rotate, and the sprockets 24 and 3
3 and the chains 27 and 36 which extend vertically are moved simultaneously. The four lifting members 5, 6, 7, 8 attached to the chains 25, 27, 34, 36 also move up and down at the same time. The plucking machine 9 and the tea bag holding frame 10 attached to these elevating bodies are moved up and down to match the height of the tea plant. The motor 44 is not always necessary, but when the up and down control is performed by automatic operation, the rotating shaft 41 is rotated by the motor 44 to be moved up and down.

FIGS. 6 and 7 show a case in which the invention of claim 3 is applied to the support 11 and the elevating body 5. FIG. A sliding plate 45 having a small coefficient of friction is attached to the surface of the support 11. The elevating body 5 is pulled by the chain 25 and slides along the slide plate 45.
In the embodiment, the tea leaf pruning machine has been described. However, when performing the pruning and cutting work, a pruning machine and a cutting machine are attached to the elevating body instead of the plucking machine. At the time of the control work, a mist spraying device is similarly attached to the elevating body.

[0015]

According to the present invention, since the column itself constituting the body is used as the elevating guide, there is no need to provide a guide rod separately from the column. Since it is the chain that transmits the force to move the lifting guide up and down, it is easier than a screw rod. The elevating body is connected from above and below with chains attached to the sprockets provided above and below each of the columns, and the upper chain is pulled when ascending, and the lower chain is pulled when descending. In addition, each of the front and rear struts has an elevating chain, and the tea garden's
Since it can be moved up and down by supporting it with the elevating bodies at the two places, the heavy work beam can be moved up and down smoothly without difficulty. Further, the manufacture of the airframe is simple, there are few failures, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a riding plucking machine according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is an enlarged plan view showing the relationship between the left and right front and rear supports and the elevating body.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a plan view of a column according to the third embodiment.

FIG. 7 is a view of FIG. 6 as viewed from the side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling device (left) 2 Traveling device (right) 3 Gate form 4 Engine 5 Lifting body (left front) 6 Lifting body (left rear) 7 Lifting body (right front) 8 Lifting body (right rear) 9 Picking machine 10 Tea bag holding Frame 11 support (left front) 12 support (left rear) 13 support (right front) 14 support (right rear) 15 sliding board (left front) 16 sliding board (left rear) 17 sliding board (right front) 18 sliding board (right rear) 19 Sprockets (on the left front column) 20 Sprockets (in the lower left column) 21 Sprockets (outside the lower left column) 22 Sprockets (outside the lower left column) 23 Sprockets (in the lower left column) 24 Sprockets (on the left rear column) 25 Up and down Chain (front left) 26 Front and rear connecting chain (left) 27 Vertical chain (rear left) 28 Sprocket (upper right front column) 29 Sprocket (under right front column) 30 Sprocket (outside right front column lower) 31 Sprocket (right) Sprockets (under the right rear column) 33 Sprockets (on the right rear column) 34 Vertical chain (front right) 35 Front and rear connecting chain (right) 36 Vertical chain (right rear) 37 Worker 38 Driver's seat 39 Tea bag 40 Tea ridge 41 Rotary shaft 42 Gear box 43 Handle 44 Motor 45 Sliding plate

Claims (6)

[Claims] 1. A gate-shaped airframe extending over a tea ridge and a tea garden management machine having a traveling device at a lower portion of the airframe, an up-and-down body wrapping up a support that constitutes the airframe is provided, and is slid up and down along the support. Tea garden management machine characterized by moving. 2. The tea garden management machine according to claim 1, wherein a member having a low coefficient of friction is attached to said elevating body. 3. The tea garden management machine according to claim 1, wherein a member having a small coefficient of friction is attached to a column on which the lifting member slides up and down. 4. Sprockets are provided above and below the column,
The tea garden management machine according to claim 1, 2 or 3, wherein a chain is stretched along the column, and the lifting body is connected with the chain and moved up and down. 5. The left and right supports of a gate formwork constituting the body,
The above-described vertical mechanism is provided, a sprocket provided on the upper part is connected with a rotating shaft, a worm wheel is provided on the rotating shaft, a worm gear integrated therewith is turned, and the left and right elevating bodies are simultaneously moved up and down. The tea garden management machine according to claim 1, 2, 3, or 4. 6. The front, rear, left and right four pillars constituting the body,
Sprockets are provided on each top and bottom, chains are stretched along each column, elevating bodies that go up and down along each column are provided, and the sprockets provided on the upper left and right columns in front are connected by a rotating shaft, and the lower part of the left and right columns The sprocket provided on the left side is connected to the lower sprocket of the left rear column on the left side and the lower sprocket of the right rear column on the right side by a power transmission mechanism, and the four elevating bodies of front, rear, right and left are simultaneously moved up and down. Item 7. A tea garden management machine according to item 1, 2, 3, 4, or 5.