KR20100031918A - Cart for work - Google Patents

Abstract

PURPOSE: A conveying vehicle is provided to perform a working task on a high position using a worktable which can move up and down. CONSTITUTION: A conveying vehicle comprises a vehicle body(11), a worktable(12), a lift(13), a drive unit(14) and a spring unit(15). The worktable can move up and down. The lift is installed between the vehicle body and the worktable. The drive unit operates the lift. The spring unit is connected between the vehicle body and the worktable, and lifts the worktable using less power.

Description

Cart for work}

The present invention relates to a work cart used for various purposes, such as repairing facilities or harvesting fruit in an industrial site or orchard, more specifically, the height can be adjusted, in particular, the work table with a small force during the initial rise of the workbench By making it easy to raise, it relates to the working truck which can exhibit the outstanding performance even in a small capacity.

In general, the work cart is used to quickly and safely approach a work position without additional equipment, and is particularly widely used for plumbing, duct work, plastering, and building exterior wall construction.

The work trolley used for this purpose is a moving means equipped with wheels so as to move to a working position, a work platform where a worker carries out work by loading necessary tools and materials at the working position, between an upper end of the moving means and a lower end of the working table. It is installed to be foldable and comprises a lifting means for raising and lowering the worktable to the working position.

Accordingly, after moving to a position for work through a moving means such as wheels, the worker boarded in the state loaded with the tools and materials necessary for the work on the work table, the work platform is raised by the operation of the lifting means to work Work is carried out in the stopped position, and when the work is completed, all the work is completed when the work platform is lowered to the original position by the operation of the lifting means.

On the other hand, for orchard farming, fruit can be harvested from fruit trees by fertilizing a large number of fruit trees or by spraying pesticides and by continuously managing the fruit trees.

For example, when pruning a fruit tree, the first time the fruit grows, the ladder is leaned against the tree, and the worker climbs the ladder and prunes or excesses.

In addition, when harvesting fruit from the fruit tree, a long pole or a ladder is used to drop the fruit placed at a high position.

When you manage the fruit trees in the orchard or harvest the fruits like this, you need to use a ladder to climb to a high place, so it is difficult and inconvenient to work, and there is a risk of accidents such as falling.

In addition, orchards, etc. to transport the harvested fruit or fertilize the fruit trees, the fruit box or fertilizer bag at this time is a heavy weight, so it is very inefficient to transport directly to the workforce.

For these reasons, in recent years, anyone in the orchard can operate freely and maneuver freely, and it is possible to use a work cart equipped with a work platform capable of safe maneuverability and operation even in the rough terrain of the orchard and capable of raising and lowering. It is a popular trend.

However, the conventional work cart has a disadvantage that requires a lot of power at the beginning when the work platform is raised, which is required to have a hydraulic device such as a large-capacity cylinder, etc. As a result, the overall structure of the truck is complicated and the size and size are also increased. There is a disadvantage in that the efficiency is poor in terms of handling, management, usability, etc., and there is a disadvantage in that the economic aspect such as an increase in manufacturing cost.

Therefore, the present invention has been devised in view of the above, it is possible to raise the workbench to the desired height by using the battery power and the elasticity of the spring after a certain height while replacing the initial driving force when the workbench rises with the spring force. By implementing a new type of bogie, it is possible to reduce the power associated with the rise of the workbench, thereby simplifying the overall structure of the bogie, making it possible to miniaturize the scale. The purpose is to provide a work balance that can be greatly reduced.

To achieve the above object, the work cart provided in the present invention includes a bogie body configured to be movable, a worktable capable of raising and lowering, a collapsible lift connected between the bogie body and the workbench, and operating the lift. It is characterized in that it is made of a structure comprising a drive device, and a spring device for connecting between the main body and the workbench to increase the workbench by using a force restored when the workbench is compressed after the workbench descends.

Here, the spring device is a shaft extending vertically from the bottom of the workbench, a spring housing that can accommodate a portion of the lower end of the shaft and is installed on the bogie body to receive the lower end of the spring, disposed around the lower end of the shaft and the flange and the spring housing of the shaft It is preferable to configure in a form including a spring or the like that is supported at both ends between the bottom of the force to always push the shaft up.

The work cart provided by the present invention can efficiently perform work in a high position by using a worktable capable of raising and lowering, as well as a new lifting using the compressed force of the spring when raising the worktable to the working position. By adopting the method, most of the power required to raise the workbench can be replaced by spring restoring force, and thus excellent performance can be achieved with only a small amount of power. Therefore, the overall structure of the truck can be simplified and the size can be reduced. In addition, it is easy to handle, maintain and repair, and above all, the production cost is low, so there is an advantage that can be used in small businesses or farms without any burden.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view showing a work balance according to an embodiment of the present invention, Figure 2 is a plan view showing a work balance according to an embodiment of the present invention.

As shown in Figs. 1 and 2, the work cart is a work table 12 using the motor 20 and the spring device 15 using the spring restoring force as the main power means. It is made in the form that can raise the working position.

In particular, when the lift 13 is moved to some extent by the operation of the motor 20 during the initial rise of the work table 12, the work table 12 is then raised to a predetermined height by the power exerted by the spring device 15. By doing so, even if only the motor 20 of a small capacity | capacitance is used, that is, the work bench 12 can be raised efficiently with little power.

To this end, the work trolley is a trolley body 11 made of a rectangular steel frame structure, a work platform 12 which can be practically carried by the operator, and a lift 13 that raises and lowers the work table 12 while being folded. ), A driving device 14 for providing power for raising and lowering the worktable 12, and a spring device 15 for providing most power when the worktable 12 is raised.

The trolley body 11 can be moved to a work place using four wheels 10, and in particular, each wheel 10 has one wheel driving motor 27 assigned thereto.

Accordingly, when the wheel driving motor 27 supplied with power from the battery 19 is operated, the balance body 11 may be moved to a desired place by driving the wheel 10.

At this time, the transmission form between the wheel driving motor 27 and the wheel 10 may be a conventional transmission form connecting the motor shaft and the wheel shaft via a reducer or the like.

Here, one of the two wheels 10 of the four wheels 10 is preferably installed in a structure capable of changing the direction by a steering device (not shown).

The work table 12 is formed in the form of a square steel structure having a size corresponding to approximately the balance body 11, both sides are equipped with handrails for convenience and safety.

The work table 12 is arranged side by side on the upper portion of the main body 11, it is supported by a pair of lift 13 is installed in a structure capable of raising and lowering by the folding motion of the lift (13).

The driving device 14 uses the battery 19 as a power source, and functions to move the lift 13 by using the operation of the motor 20 and rack / pinion transmission.

To this end, the battery main body 11 is installed, and between the lower ends of the movable bar 25a of the lift 13, the drive shaft 24 is installed in a rotatable structure and at the same time the drive shaft ( 24 is connected to the gearbox 21 side directly connected to the motor 20.

For example, the motor 20 and the gear box 21 are installed on the bracket of the lift 13, and the drive shafts 24 are connected to both output sides of the gear box 21 thus installed. In this case, the drive shaft 24 extends to both sides and is installed to penetrate the lower end of the movable bar 25a of the lift 13.

In addition, pinions 22 are mounted at both ends of the drive shaft 24, and the pinions 22 are supported in such a manner as to engage with the racks 23 provided on both sides of the trolley body 11.

Accordingly, when the motor 20 is operated by receiving power from the battery 19, the power at this time is transmitted to both drive shafts 24 via the gearbox 21, and then the rotation of the drive shaft 24 is continued. As the pinion 22 is moved on the rack 23, the movable bar 25a of the lift 13 is also moved together, so that the lift 13 is folded or unfolded by the movement of the bar 25a. While raising and lowering the worktable 12 can be made.

The lift 13 is composed of a bar structure consisting of two bars (25a, 25b) are combined in an X shape, the bar structure is provided with a pair between the bogie body 11 and the work table 12 It is arranged before and after being supported to support the work table 12, and also serves to raise and lower the work table 12 through a folding motion.

The lift 13 has a fixed end on one side and a mobile end on the other side, whereby the lift 13 can be folded or unfolded by the movement of the moving end.

For example, four connecting bars 29a, 29b, 29c, and 29d and a drive shaft 24 are interposed between the pair of bar structures, and are installed at each end and an intersection thereof. In this case, one bar 25a is provided. In the case of), the upper end forms a fixed point on the work table 12 side through the connecting bar 29a, and the lower end forms a moving point on the bogie body 11 side through the drive shaft 24, and the other one bar ( In the case of 25b), the upper end forms a moving point on the worktable 12 side through the connecting bar 29b, and the lower end forms a fixed point on the bogie body 11 side through the connecting bar 29c.

At this time, the upper movement point of the bar (25b) is equipped with a roller 30 to move along the rail 26 formed on the work table 12, the two bars (25a, 25b) The connecting bar 29d, which is installed at the intersection part, serves as a central axis to set the standard when the bar is folded.

Accordingly, when transmission is performed between the rack 23 and the pinion 22 by the rotation of the drive shaft 24 attached to the lower movement point of the bar 25a, the lower movement point of the bar 25a and the bar 25b By moving the top moving point of the back and forth, the lift 13 can be folded or unfolded, and eventually the work table 12 can be raised or lowered by the folding movement of the lift 13.

The spring device 15 stores the compressed force of the spring 18 when the work table 12 is lowered, and then exerts the stored force at the time of the work table 12 when the work table 12 is raised. It is a means to provide a large amount of power during the initial rise as well as most of the power required during the rise.

To this end, a shaft 16 having a flange 28 for supporting the spring 18 is installed in the bottom portion of the work table 12 and extends vertically in a predetermined length, and the bogie body 11 A spring housing 17 is formed which is made of a cylindrical shape of the upper opening type for accommodating the spring 18.

In addition, the spring 18, which substantially provides the restoring force (expansion force) after compression, is accommodated in the spring housing 17 and installed in a form surrounding the lower end of the shaft 16 at a predetermined length.

That is, the spring 18 at this time is installed in a form in which the lower end is supported on the bottom of the spring housing 17, the upper end is supported on the flange 28 of the shaft 16.

Accordingly, the spring 18 is compressed when the shaft 16 along with the work table 12 is lowered, and pushes the shaft 16 upward when the work table 12 is raised, thereby the work table 12 It is possible to provide power at the rise of.

Therefore, looking at the rising and falling operating state of the working platform in the work cart configured as described above are as follows.

Figure 3 is a side use state diagram showing the falling / rising state of the work platform in the work cart according to an embodiment of the present invention.

As shown in FIG. 3, the work table 12 shows a lowered state where the work table 12 is closely attached to the balance body 11 side.

At this time, the spring 18 of the spring device 15 is pressed by the flange 28 of the shaft 16 to be fully accommodated in the spring housing 17 while maintaining a state of maximum compression, the shaft 16 The lower end part of is also in a state in which a part is entered in the spring housing 17.

In addition, the lift 13 is in a completely folded state.

As shown by the virtual line in FIG. 3, in order to ascend the worktable 12 to the working position, first, when the motor 20 is operated, the power at this time is output through the gearbox 21, and both drive shafts 24 are provided. As the pinion 22 at both ends moves along the rack 23 as the rotation rotates), the moving point of the lift 13 is extended to one side, and at the same time, the compressed spring 18 is restored and the shaft 16 is restored. Since the whole work table 12 is pushed up, the work table 12 can be smoothly lifted by the power of the spring 18 with the unfolding of the lift 13 without a large force.

That is, by simply operating the motor 20 at the initial stage of the work table 12 to move the moving point of the lift 13 slightly, the spring 18 then uses the restoring force of the work table 12 to operate the work table 12. Since it is raised, it is possible to effectively raise the work table 12 without a large power.

As described above, the work cart provided in the present invention can be easily moved to a desired work place when maintenance and inspection work, fruit harvesting work, etc. at a work site or orchard, etc. In addition, since the work can be performed and the height of the workbench can be increased, the worker can increase the work efficiency, such as being able to work more easily in the high working condition while standing thereon.

In particular, by using the power of the spring for most of the power when the work platform, it is possible to easily raise the work platform even with a small amount of battery power, it is possible to increase the efficiency associated with the power usage of the bogie.

1 is a side view showing a work balance according to an embodiment of the present invention

Figure 2 is a plan view showing a work cart according to an embodiment of the present invention

Figure 3 is a side use state showing the falling / rising state of the work platform in the work cart according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

10: wheel 11: bogie body

12: workbench 13: lift

14: drive device 15: spring device

16: shaft 17: spring housing

18: spring 19: battery

20: motor 21: gearbox

22: pinion 23: rack

24: drive shaft 25a, 25b: bar

26: rail 27: wheel driving motor

28: Flange 29a, 29b, 29c, 29d: Connection bar

30: roller

Claims (5)

In the work cart, The balance main body 11; A worktable 12 capable of raising and lowering; A collapsible lift (13) connected between the cart body (11) and the work table (12); A driving device (14) for operating the lift (13); A spring device 15 connected between the cart body 11 and the work table 12 to raise the work table 12 by using a force restored when the work table is lowered and then compressed when the work table is lowered; A work cart comprising the. The spring device 15 of claim 1, wherein the spring device 15 accommodates a shaft 16 vertically extending from the bottom surface of the work table 12 and a portion of the lower end of the shaft 16 and is installed on the bogie body 11 so as to have a spring. A spring housing 17 which receives the lower end of the 18 and a circumferential end disposed around the lower end of the shaft 16 and supported both ends between the flange 28 of the shaft 16 and the bottom of the spring housing 17. A work cart comprising a spring 18 for exerting a force in a direction to push the shaft 16 up. The method of claim 1, wherein the driving device 15 is a motor 20 that is operated by receiving power from the battery 19, a gear box 21 for transmitting the shaft of the motor 20, and the gear box ( 21 and a drive shaft 24 connected to the side to receive power and move along the rack 23 in the bogie body 11 using the pinions 22 at both ends to fold or unfold the lift 13. Work cart characterized in that configured. The method of claim 1, wherein the lift 13 is made up of a pair of front and rear bar structures 25 combined in an X-shape while spanning between the bogie body 11 and the work table 12, the bar structure 25 One of the bars 25a and 25b constitutes a fixed end and the other of the bars 25a and 25b is connected to the drive shaft 24 of the driving device 15. And the movable end of the other bar 25b is movable along the rail 26 in the worktable 12. The work cart according to claim 1, wherein each wheel (10) of the trolley main body (11) is provided with a wheel driving motor (27) one by one so that the trolley can be moved by a power source of the battery (19).

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