JP2006206260A - Working carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working carriage provided with a high safety and easiness in conducting the maintenance works. <P>SOLUTION: The working carriage 10 is equipped with a machine body 11 having a built-in motor to drive casters 4 and 15 and structured so that a working platform 13 is provided over the machine body 11 through an elevating/sinking means 12, wherein the machine body 11 is embodied in a flat box whose width to the left and right is made smaller than the length fore and aft, while the height over the ground of the working platform 13 when the means 12 elongates upward to cause the platform 13 to be positioned at the uppermost position, is made larger than the left-right width of the machine body 11, and the platform 13 is placed in the center to left and right of the machine body 11 upright with the aid of the elevating/sinking means 12, and also a pair of batteries 16 and 17 are installed symmetrically on the left and right of the machine body 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a work carriage, and more particularly to a work carriage that can easily perform farming work at a high place in facility horticulture or the like and has high stability.

Conventionally, in Japanese Patent Application Laid-Open No. 2003-206098, a work cart has been proposed in which the vehicle body is propelled while driving wheels are driven by an electric motor, and an operator can get on the work table that can be moved up and down to perform work at high places. Has been.
As shown in FIG. 7, the work cart 1 of this publication is provided with a wheel 2 that travels along a pipe rail 6 provided in a house at the lower part of the machine body 3, and the work board 5 on which an operator rides is installed in the machine body 3. It arrange | positions through the raising / lowering link 4. Between the terminals of the electric motor M built in the machine body 3 is provided with a regenerative braking circuit provided with a resistor, and when the electric motor M is stopped, a resistance is applied to the inertial rotation of the motor to gradually stop the motor. This prevents sudden stops and increases safety when working at heights.

However, when an operator stands on the work platform 5 raised to the lift link 4 and performs a work at a high place, if the operator places a biased weight, such as leaning on a handrail, the direction of the arrow in FIG. There is a possibility that the work carriage 1 may tilt and fall.
In addition, in the publication, the arrangement of the battery that supplies power to the motor M is not clear. However, if the battery is built in the body 3, the body 3 must be separated when the battery liquid is replenished, and the number of operations is reduced. As a result, there is a problem that the maintainability of the battery is lowered.
JP 2003-206098 A

  This invention is made | formed in view of the said problem, and makes it a subject to provide the work trolley | bogie with high stability and maintainability.

In order to solve the above problems, the present invention is a work cart provided with a machine body incorporating a motor for driving a wheel, and a work table is disposed on the upper part of the machine body through lifting means,
The machine body is a flat box having a lateral width smaller than the longitudinal length, and the ground height of the work table when the lifting means extends upward and the work table is positioned at the highest point is the machine body. Larger than the left and right width of
There is provided a work carriage characterized in that the work table is erected at the center in the left-right direction of the machine body via the lifting means, and a pair of batteries are arranged on both left and right sides of the machine body. Yes.

With the above configuration, the machine body is shorter in the left-right width than the front-rear length, and the ground surface height of the work table is larger than the left-right width of the machine body. Since the balance of the aircraft in the left and right direction becomes unstable when it is on the back, heavy batteries are distributed on the left and right sides of the aircraft, so the battery weight serves as a balance weight and improves the stability of the aircraft in the left and right direction can do.
The pair of batteries may be arranged symmetrically. Further, it is preferable that a part of the battery is disposed so as to protrude downward from the airframe because the center of gravity becomes lower and stability is improved. Also, if the battery is arranged in the front-rear direction at the center or slightly rearward, that is, within a range of 1/2 to 2/3 of the front-rear length (assuming that the front end is 0 and the rear end is 1), Even in the case of a sudden stop, it is preferable that the front is not easily turned.

  The machine body protrudes in the left-right direction from the work table, and the battery is built in the housing in the left-right projecting portion of the machine body, and an opening / closing lid is formed at a location covering the battery of the housing. And preferred.

  With the above configuration, the battery is not disposed at the lower part of the workbench and the battery can be exposed by simply opening the opening / closing lid of the housing. Battery maintenance can be easily performed. In addition, it is preferable that the outer surface of the opening / closing lid is made to be in the same shape as the outer surface of the housing when the opening / closing lid is closed, which prevents the operator from scratching when using the outer surface of the housing. .

As is clear from the above description, according to the present invention, heavy batteries are arranged on both the left and right sides of the aircraft whose front and rear length is longer than the left and right width, so that the pair of batteries function as weights that balance the left and right. Fulfill. Therefore, even if the work table rises and becomes tall, the left and right machine body balance is stabilized, and the work cart can be prevented from falling.
In addition, since the battery can be exposed only by opening the opening / closing lid of the housing without arranging the battery at the lower part of the workbench, battery maintenance workability is greatly improved.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the work cart 10 according to the present embodiment includes a machine body 11, a work table 13 erected at the center in the left-right direction of the machine body 11 via lifting means 12, and a lower part of the machine body 11. A front wheel 14 and a rear wheel 15 attached to the vehicle.

  As shown in FIG. 2, the airframe 11 has a flat box shape with a substantially rectangular shape when viewed from above, and has a lateral width W smaller than the longitudinal length L and a lateral width W larger than the work table 13. It protrudes on both the left and right sides. The side surface of the body 11 is covered with the first housing 18, and the upper surface of the left and right protruding portions of the body 11 is covered with the second housing 19. Further, as shown in FIGS. 1 to 3, a pair of battery installation portions 23 are provided to protrude downward from the body 11 on the left and right sides in the center in the front-rear direction of the body 11, and the pair of batteries 16, 17 are connected to the battery installation portion 23. And projecting downward from the body 11. As described above, the batteries 16 and 17 are provided at portions projecting to the left and right of the work table 13 so as not to be disposed below the work table 13.

  A first opening / closing lid 20 is formed at a location covering the batteries 16, 17 of the first housing 18, and a second opening / closing lid 21 is formed at a location covering the batteries 16, 17 of the second housing 19. The batteries 16 and 17 can be exposed by opening the lid 20 and the second opening / closing lid 21. As shown in FIGS. 5 and 6, the first opening / closing lid 20 has an inverted L-shaped cross section, and locking claws (not shown) provided on both sides of the upper end are longitudinally cut in the front-rear direction on both sides of the upper surface of the body 11. It engages with a locked hole 54a drilled in the frame 54 and can be opened and closed. The second opening / closing lid 21 is joined to a frame 53 on the center side of the machine body 11 via a hinge 52 so as to be freely opened and closed. The leading edge of the second opening / closing lid 21 is configured to overlap the upper surface of the first opening / closing lid 20.

As shown in FIG. 3, a motor M for driving the front wheels 14 and the rear wheels 15 is built in the central position of the body 11. The front wheels 14 and the rear wheels 15 are rotatably supported by attachment pieces 55 suspended from both sides of the body 11, and rotational power is transmitted from the motor M to the axles 56 of the front wheels 14 and the rear wheels 15.
Casters 25 and 26 whose rotational direction is the left-right direction of the body are provided in the lower part of the front of the body 11 (and between the batteries 16 and 17 and the rear wheel 15). Specifically, the pair of casters 25, 26 are rotatably attached to swing pieces 27, 28 suspended from the body 11, and the axles of the casters 25, 26 are connected by a link material 29. Each swing piece 27, 28 is configured to be tilted by a motor (not shown). Each caster 25, 26 is set to be positioned below the front and rear wheels 14, 15 at the lowest point.
A main power switch 30 and an emergency stop button 31 are provided at the front of the machine body 11. Further, a step 24 for an operator to get on the work table 13 is attached to the rear portion of the machine body 11 so as to be tiltable.

A pantograph-like elevating means 12 is vertically provided in the center in the left-right direction of the machine body 11 so as to elevate by the expansion and contraction of the hydraulic cylinders 50 and 51.
A work table 13 is attached to the upper part of the lifting means 12. The ground height H of the work table 13 when the lifting means 12 extends upward and the work table 13 is positioned at the uppermost point is larger than the left and right width W of the machine body 11.

A handrail frame 35 is erected on the upper surface of the work table 13, and a door 37 that can be opened and closed is provided at the rear of the frame 35 to serve as a loading port. Is provided with a basket shelf 38. In the vicinity of the center of the work table 13, a traveling pedal 36 that can be stepped on by the operator is installed. The traveling pedal 36 is urged upward when there is no load. The motor M is driven to rotate the front and rear wheels 14 and 15.
A caster operation panel 32 is provided at the front portion of the work table 13, and an exit button 33 for tilting the swing pieces 27 and 28 downward to lower the casters 25 and 26 and tilting the swing pieces 27 and 28 upward. And a return button 34 for raising the casters 25, 26.

A main controller 40 is attached to the upper end of a column 39 that stands up above the front portion of the work table 13.
On the side of the main controller 40, an UP button 41 that extends the hydraulic cylinders 50 and 51 to extend the lifting means 12 and a DOWN button 42 that contracts the hydraulic cylinders 50 and 51 and contracts the lifting means 12 downward. I have.

  On the front of the main controller 40, as shown in FIG. 4, a forward button 43 for switching the rotational drive direction of the front and rear wheels 14, 15 to the forward mode, and a reverse button for switching the rotational drive direction of the front and rear wheels 14, 15 to the reverse mode. 44, a speed adjustment dial 45 that adjusts the traveling speed 45 by adjusting the rotational speed of the motor M, and a traveling state in which the traveling state is maintained even if the traveling pedal 36 is released when the traveling pedal 36 is depressed while being depressed. A holding button 46, an emergency stop button 47, and a battery checker 48 for displaying the remaining amount of the batteries 16 and 17 are provided.

  The airframe 11 has a control means (not shown) for controlling the motor M, the power source and the like based on commands from the traveling pedal 36, the main controller 40, the caster operation panel 32, the main power switch 30, and the emergency stop button 31. Is built-in. The pair of batteries 16 and 17 are connected in series, and distribute power is supplied to the traveling motor M, the raising and lowering motors of the casters 25 and 26, and the hydraulic cylinders 50 and 51.

Next, a maintenance procedure for the batteries 16 and 17 will be described.
Since the airframe 11 is symmetrical, the battery 16 will be described as a representative. As shown in FIG. 5, when the operator holds the first opening / closing lid 20 and opens upward with the upper end as a fulcrum, the first opening / closing lid 20 The second opening / closing lid 21 placed in an overlapping manner is also lifted simultaneously with the hinge 52 as a fulcrum. From this state, as shown in FIG. 6, the second opening / closing lid 21 is fully opened, and the first opening / closing lid 20 is disengaged from the locked hole 54a and removed. Then, the upper surface and the side surface of the battery 16 are exposed, and the operator can easily perform maintenance of the battery 16 from the outside.

Next, a usage example of the work cart 10 will be described.
For example, in a greenhouse house for growing tomatoes and the like, the front and rear wheels 14 and 15 of the work carriage 10 are placed on the pipe rail 6 laid in the passage between adjacent cultivation areas, and the main power switch 30 is turned on. The worker gets on the work table 13.
Next, the operator pushes the UP button 41 on the side surface of the in-controller 40 to raise the work table 13 to a required position, and then works on the high place while stepping on the travel pedal 36 and moving on the pipe rail 6. . The work content includes, for example, a work of placing the stock along a wire suspended from the ceiling of the greenhouse house, a leaf removal work, and the like.
Next, when the work cart 10 reaches the end of the pipe rail 6, the foot is released from the travel pedal 36 to stop it, and the operator presses the DOWN button 42 to lower the work table 13 to the lowest point. Get off.
Next, the casters 25 and 26 are lowered to the lowest point by pushing the exit button 33 of the caster operation panel 32, and are moved laterally to other adjacent pipe rails by the grounded casters 25 and 26. Repeat the work.

  According to the work carriage 10 having the above-described configuration, the heavy batteries 16 and 17 are symmetrically arranged on the left and right sides of the airframe 11 having a lateral width W smaller than the longitudinal length L. Even if the height of the work cart 10 is increased, the balance of the machine body in the left-right direction is stabilized, and the work cart 10 can be prevented from falling. Further, the batteries 16 and 17 are not disposed below the work table 13, and the batteries 16 and 17 can be exposed only by opening the first opening / closing lid 20 and the second opening / closing lid 21. In addition, it is possible to easily perform maintenance such as replenishment of battery fluid from the outside without obstructing the lifting and lowering means 12.

It is a perspective view of the work trolley | bogie of embodiment of this invention. It is a top view of a work trolley. It is a front view of a work trolley. It is drawing which shows a main controller. It is a principal part perspective view explaining operation | movement of an opening-and-closing lid. It is a principal part perspective view explaining operation | movement of an opening-and-closing lid. It is drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Work trolley 11 Machine body 12 Elevating means 13 Work table 14 Rear wheel 15 Front wheels 16, 17 Battery 18 First housing 19 Second housing 20 First opening / closing lid 21 Second opening / closing lid 25, 26 Caster 36 Traveling pedal 40 Main controller M Motor

Claims (2)

A work carriage provided with a machine body incorporating a motor for driving a wheel, and a workbench arranged on an upper part of the machine body through lifting means,
The machine body is a flat box having a lateral width smaller than the longitudinal length, and the ground height of the work table when the lifting means extends upward and the work table is positioned at the highest point is the machine body. Larger than the left and right width of
A work carriage characterized in that the work table is erected at the center in the left-right direction of the machine body via the elevating means, and a pair of batteries are arranged on both the left and right sides of the machine body.   The machine body protrudes in the left-right direction from the work table, and the battery is built in the housing in the left-right projecting portion of the machine body, and an opening / closing lid is formed at a location covering the battery of the housing. The work cart according to claim 1.

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