JP6747715B2 - Work trolley - Google Patents

Description

The present invention relates to a work trolley.

Conventionally, in facility horticulture for cultivating fruits and vegetables such as tomato, paprika, eggplant, and cucumber, the length of the crop is often 2 m or more, which often results in a position beyond the reach of the operator. For this reason, when performing cultivation management or fruit harvesting, a stepladder or a wheelbarrow is used as a stepping stone to perform work in high places. In this case, the operator has to move the footsteps by an appropriate distance and perform the work while repeatedly ascending and descending the footsteps, resulting in a heavy physical burden.

On the other hand, in order to reduce the physical burden on the worker, there has been proposed a work carriage or a work moving device that allows the worker to get in and move along a track (rail) by traveling wheels (for example, , Patent Documents 1 and 2).

JP, 2009-77656, A JP, 10-338144, A

However, since the work carriage described in Patent Document 1 has the traveling electric motor, the weight of the carriage increases and it is expensive. On the other hand, in the work moving device described in Patent Document 2, the wheel for track running is rotated by manually rotating the rotatable handle, but the handle is installed only in one place. Therefore, depending on the structure and size of the work moving device, it may be necessary to move the work moving device to a position where the handle can be reached, which is not efficient.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a work cart capable of improving work efficiency.

In one aspect, the work carriage is provided with a work carriage main body capable of moving between crop ridges by rotation of wheels and capable of working at a plurality of height positions, and a first operation handle, and extending in the height direction. A first drive system having a first rotation shaft and a first transmission mechanism that transmits the rotation of the first rotation shaft to the wheels and rotates the wheels, and a height different from that of the first operation handle. A second drive system that is provided with a second operation handle and that has a second rotating shaft extending in the height direction and a second transmission mechanism that transmits the rotation of the second rotating shaft to the first rotating shaft; , Are provided.

The work carriage of the present invention has an effect that work efficiency can be improved.

FIG. 1A is a diagram showing a state in which the work carriage is viewed from the front side (−Y side), and FIG. 1B is a state in which the work carriage is viewed from the side surface side (−X side). It is a figure. FIG. 2A and FIG. 2B are diagrams showing a state in which an operator is riding on a stepped portion viewed from the front side (−Y side) and the side surface side (−X side). It is a figure which expands and shows the state which looked at the 1st traveling wheel vicinity from the -X side. FIG. 4A and FIG. 4B are views for explaining the relationship between the rotation of the first operation handle and the second operation handle and the rotation of the first traveling wheel. 5(a) and 5(b) are graphs for explaining the effect of the work carriage. FIG. 6A and FIG. 6B are views for explaining a modified example of the second rotation shaft.

Hereinafter, the work carriage according to the embodiment will be described in detail with reference to FIGS. 1 to 5. The work trolley 100 of the present embodiment is used when a worker performs work such as pruning, sprouting, attracting, hanging down, and harvesting at a high place in facility horticulture for cultivating fruits and vegetables such as tomatoes, paprika, eggplant, and cucumber. Is a dolly used for. 1A shows a state where the work carriage 100 is viewed from the front side (−Y side), and FIG. 1B shows a state where the work carriage 100 is viewed from the side surface side (−X side). There is. Note that in FIGS. 1A and 1B, the XY plane matches the horizontal plane, and the Z-axis direction matches the height direction (vertical direction).

The work carriage 100 is movable along a pair (two) of rails R laid between the ridges of the crop, as shown in FIGS. 1(a) and 1(b). The work cart main body 10 includes a first traveling wheel 12 and a second traveling wheel 14, and a drive mechanism 16 used by an operator to rotate the first traveling wheel 12. In addition, in this embodiment, the rail R is assumed to be laid in the ridge along the X-axis direction.

The work trolley body 10 is a structure manufactured by, for example, assembling plastic pipes, and has a work pedestal portion 24 and a step-shaped portion 22. As shown in FIGS. 1A and 1B, the workbench portion 24 is a portion that stands when the worker performs a work, and is provided with a tread plate 26. The step-like portion 22 is used for the worker to go up to the workbench portion 24, and is also used when performing a work at a position lower than the work performed on the workbench portion 24. That is, in the present embodiment, the workbench portion 24 is the first work position where the worker works, and the stepped portion 22 is the second work position whose height position is different from the first work position. .. FIG. 2A and FIG. 2B show a state in which the worker is riding on the stepped portion 22 as viewed from the front side (−Y side) and the side surface side (−X side). Note that the stepped portion 22 may also be provided with a tread plate, like the workbench portion 24. The work carriage main body 10 may be manufactured using, for example, an aluminum pipe. Further, the structure of the work carriage main body 10 does not have to be a frame-like structure as shown in FIG.

FIG. 3 is an enlarged view showing a state in which the vicinity of the first traveling wheel 12 is viewed from the −X side. As shown in FIG. 3, the first traveling wheel 12 includes an axle 30 extending in the Y-axis direction, drive wheels 32A and 32B provided at both ends of the axle 30, a +Y side surface of the drive wheel 32A, and a drive wheel 32B. The guide members 34A and 34B are provided on the -Y side surface.

The axle 30 is provided in the lower portion of the work carriage main body 10 so as to be rotatable around the Y axis, and a bevel gear 40A is fixed near the central portion in the Y axis direction. The drive wheels 32A and 32B are cylindrical members and move on the rail R while rotating. The guide members 34A and 34B are disk-shaped members, and prevent the drive wheels 32A and 32B from falling off the rail R by contacting the rail R while the drive wheels 32A and 32B move on the rail R. Have the function to

The second traveling wheel 14 has the same configuration as the first traveling wheel 12 except that the bevel gear is not provided on the axle.

Returning to FIG. 1A and FIG. 1B, the drive mechanism 16 includes a first rotating shaft 52 provided with a first operating handle 50 at an upper end portion (+Z end portion), and a second operating handle 60. Has a second rotating shaft 62 provided at the upper end (+Z end). As shown in FIGS. 1A and 1B, the first operation handle 50 is provided at a position where an operator can easily rotate the work table portion 24 (first work position). Has been. On the other hand, as shown in FIGS. 2(a) and 2(b), the second operating handle 60 is at a position where the operator can easily rotate the stepped portion 22 (second working position). It is provided (in the vicinity of the stepped portion 22). Here, the height position of the second operating handle 60 is set lower than that of the first operating handle 50. The tread plate 26 is provided with a cutout portion 26a in order to avoid mechanical interference with the first rotating shaft 52 (see FIG. 2B).

As shown in FIG. 3, a bevel gear 40B is provided at the lower end of the first rotating shaft 52. Since the bevel gear 40B meshes with the bevel gear 40A fixed to the axle 30 of the first traveling wheel 12, the rotation of the first rotation shaft 52 around the Z axis is transmitted to the axle 30, and the axle 30 is rotated along the Y axis. It is designed to rotate around. In the present embodiment, the first transmission mechanism 42 that includes the bevel gears 40A and 40B and that transmits the rotation of the first rotation shaft 52 to the axle shaft 30 is configured. Further, the first drive system is configured to include the first rotary shaft 52 provided with the first operation handle 50 and the first transmission mechanism 42.

As shown in FIGS. 1A and 1B, a sprocket 54 is fixed to a part of the first rotating shaft 52, and a sprocket 64 is provided to a part of the second rotating shaft 62. It is fixed. The height positions of the sprocket 54 and the sprocket 64 are the same, and the sprocket 54, 64 is provided with a roller chain 74. Therefore, the rotation of the second rotary shaft 62 around the Z axis is transmitted to the first rotary shaft 52 via the sprockets 54 and 64 and the roller chain 74. In the present embodiment, a second transmission mechanism 84 that includes the sprockets 54 and 64 and the roller chain 74 and that transmits the rotation of the second rotation shaft 62 to the first rotation shaft 52 is configured. Further, the second drive system is configured to include the second rotating shaft 62 provided with the second operation handle 60 and the second transmission mechanism 84.

FIG. 4A and FIG. 4B are diagrams for explaining the relationship between the rotation of the first operating handle 50 and the second operating handle 60 and the rotation of the first traveling wheel 12. In the present embodiment, the worker rotates the first operating handle 50 in the clockwise direction when viewed from the +Z direction, as indicated by the solid arrow A in FIG. Rotates counterclockwise when viewed from the -Y direction (solid arrow B direction). Thereby, the work carriage 100 can be moved in the -X direction. Conversely, the worker rotates the first operating handle 50 in the direction opposite to the solid arrow A (counterclockwise direction when viewed from the +Z direction) to move the work carriage 100 in the +X direction. be able to.

On the other hand, the operator rotates the second operating handle 60 in the clockwise direction when viewed from the +Z direction, as indicated by the solid arrow C in FIG. 4B, whereby the roller chain 74 of the second transmission mechanism 84 is rotated. Rotates in the clockwise direction (the direction of the solid arrow D) when viewed from the +Z direction, and accordingly, the first traveling wheel 12 rotates in the counterclockwise direction (the direction of the solid arrow E) when viewed from the -Y direction. To do. Thereby, the work carriage 100 can be moved in the -X direction. Further, the worker can move the work carriage 100 in the +X direction by rotating the second operation handle 60 in the direction opposite to the solid arrow C (counterclockwise direction when viewed from the +Z direction).

As described above, in the present embodiment, the operator operates the first operating handle 50 when the operator is on the workbench portion 24, and operates the second operating handle 60 when the operator is on the stepped portion 22. Since it can be operated, in any case, the work carriage 100 can be moved (forward or backward) along the rail R.

As described above in detail, according to the present embodiment, the work trolley body 10 capable of working at a plurality of height positions moves between the ridges of the crop by the rotation of the first traveling wheels 12, and The transmission mechanism 42 transmits the rotation of the first rotation shaft 52 (the rotation of the first operation handle 50) to the wheels, and the second transmission mechanism 84 rotates the second rotation shaft 62 (the rotation of the second operation handle 60). Rotation) is transmitted to the first rotating shaft 52. As a result, in the present embodiment, when the first operation handle 50 is rotated, the work carriage main body 10 can be moved forward and backward, and when the second operation handle 60 is rotated, the second operation handle 60 is also rotated. Since the first rotating shaft 52 is rotated by the action of the transmission mechanism 84, the work carriage main body 10 can be moved forward and backward. For example, if only one operating handle is installed on the work carriage main body 10, depending on the structure and size of the work carriage main body 10, the work carriage main body 10 may be operated from the position where the work is performed when moving forward and backward. You may have to move to a position where you can reach the handle. On the other hand, in the present embodiment, since a plurality of operating handles are provided at different positions and heights, it is possible to reduce the need for the operator to move when moving the work carriage main body 10 back and forth. .. Thereby, the work efficiency of the worker can be improved.

Here, in FIG. 5A, the worker A is at the position shown in FIG. 2A and FIG. 2B, and the conventional machine (the work truck of the same type in which only the first operation handle 50 is provided). ) Is used to perform a work (scraping or attracting a ground height of about 2.5 m) and a work speed when the work vehicle 100 of the present embodiment is used to perform the same work. ing. Further, in Fig. 5(b), the worker B is working at a position shown in Fig. 2(a) and Fig. 2(b) using a conventional machine (harvesting and attracting a height of about 2.5m above the ground). ) And the work speed when the same work is performed using the work carriage 100 of the present embodiment.

From FIGS. 5(a) and 5(b), the work of scraping, attracting, and harvesting is about 27 to 45% more efficient using the work carriage 100 of the present embodiment than when using a conventional machine. It can be seen that it is.

Further, in the present embodiment, since the first transmission mechanism 42 and the second transmission mechanism 84 have a simple structure, the weight of the work carriage 100 and the manufacturing cost can be reduced. Since the weight of the work carriage 100 can be reduced, it is possible to easily handle the work carriage 100 (transportation to a ridge or installation on a rail).

In the above embodiment, the second rotary shaft 162 having a stretchable structure (stretchable structure) may be adopted as the second rotary shaft provided near the stepped portion 22. An example of the second rotating shaft 162 is shown in FIGS. 6A and 6B. The second rotary shaft 162 in FIGS. 6A and 6B has a lower rotary shaft 164A and an upper rotary shaft 164B having a hollow inside, and the upper rotary shaft 164B is opposed to the lower rotary shaft 164A. It is slidable up and down (height direction). Further, the height position of the upper rotary shaft 164B can be fixed by a screw 166. Therefore, when it is desired to lengthen the second rotary shaft 162 (to raise the position of the second operation handle 60), the upper rotary shaft 164B is positioned as shown in FIG. When it is desired to shorten the shaft 162 (to lower the position of the second operation handle 60), the upper rotary shaft 164B is positioned as shown in FIG. 6B and the screw 166 is tightened. By doing so, the second operation handle 60 can be installed at a height that is easy for the operator to operate. For example, when a large amount of work is performed at the high position of the stepped portion 22, the second operation handle 60 is set high, and when a large amount of work is performed at the low position of the stepped portion 22, the second operation handle 60 is set low. You can do so. The lower rotary shaft 164A may be a spline shaft, and the hollow portion of the upper rotary shaft 164B may be shaped so that the spline shaft fits therein. Further, in the second rotary shaft 162, the inside of the lower rotary shaft 164A may be hollow, and the upper rotary shaft 164B may be inserted into the hollow portion of the lower rotary shaft 164A.

Note that not only the second rotating shaft but also the first rotating shaft 52 may have a retractable structure as shown in FIGS. 6(a) and 6(b). In this case, for example, the height position of the first operation handle 50 can be adjusted according to the height of the operator.

In the above embodiment, the case where the first transmission mechanism 42 includes the bevel gears 40A and 40B has been described, but the present invention is not limited to this, and any transmission mechanism that can transmit the rotation of the first rotation shaft 52 to the axle shaft 30 may be used. The configuration does not matter. For example, instead of the bevel gears 40A and 40B, a combination of a worm and a worm wheel, a screw gear, or the like may be used. In the above embodiment, the case where the second transmission mechanism 84 includes the sprockets 54 and 64 and the roller chain 74 has been described. However, the present invention is not limited to this, and the rotation of the second rotation shaft 62 can be transmitted to the first rotation shaft 52. The structure is not limited as long as it is a transmission mechanism. For example, a rubber belt or the like may be used instead of the roller chain 74. Further, the second transmission mechanism 84 may be a combination of a timing belt and a timing pulley.

In the above embodiment, the work carriage 100 may have the third rotating shaft provided with the third operating handle. In this case, the rotation of the third rotation shaft may be directly transmitted to the first rotation shaft 52, or may be transmitted to the first rotation shaft 52 via the second rotation shaft 62. It should be noted that the work cart may have four or more operation handles and rotary shafts.

In the above embodiment, the case where the work carriage 100 moves along the rail R has been described, but the present invention is not limited to this, and the work carriage 100 may move on the ground or a concrete headland. Even when moving on the ground, since the work carriage 100 of the present embodiment is made lightweight as described above, it is possible to suppress sinking on the ground.

The embodiment described above is an example of a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

10 work trolley body 12 first traveling wheel (wheel)
22 Stepped portion 42 First transmission mechanism (part of first drive system)
50 First Operating Handle 52 First Rotating Shaft (Part of First Driving System)
54, 64 Sprocket 60 Second operation handle 62 Second rotation shaft (part of second drive system)
84 Second transmission mechanism (part of the second drive system)
74 roller chain

Claims (3)

A work trolley body that can move between crop ridges by rotating wheels and can work at multiple height positions,
A first drive including a first rotating shaft provided with a first operation handle and extending in the height direction, and a first transmission mechanism that transmits the rotation of the first rotating shaft to the wheels and rotates the wheels. System,
A second operating handle is provided at a height different from that of the first operating handle, and a second rotating shaft extending in the height direction and a second rotating shaft for transmitting the rotation of the second rotating shaft to the first rotating shaft. A work carriage including a second drive system having two transmission mechanisms. The work carriage main body has a first work position and a second work position having a height different from that of the first work position,
The first operation handle is provided in the vicinity of the first work position, and the second operation handle is provided in the vicinity of the second work position. The work cart described. At least one of the said 1st rotating shaft and the said 2nd rotating shaft has a telescopic structure, The work trolley|bogie of Claim 1 or 2 characterized by the above-mentioned.

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