JPH11123110A - Wagon with auxiliary power mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability of a wagon by providing the main body frame with an auxiliary power mechanism and operating auxiliary power when the weight of an object to be loaded is heavy so as to widely utilize the wagon from a heavy large tool to a light small tool. SOLUTION: An auxiliary power mechanism F is provided in the main body frame 1 of a wagon (w) having freely traveling casters provided to the main body frame 1 and when the weight of an object to be loaded is heavy, auxiliary power is operated. A control means connecting a motor with a reducer 3 and a power actuator 4 to a control panel and supplying power from a power source by an operation button to operate is provided. Further, the motor 3 rotates and drives a traveling wheel 11 through a universal joint being a connecting member and a freely extensible contractible shaft. In addition, the actuator 4 grounds the wheel 11 to the floor surface of a stage so as to travel the wagon (w) by auxiliary power. An auxiliary power mechanism F is constituted by this way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wagon for carrying tools used on a stage such as a theater, and more particularly to a wagon with an auxiliary power mechanism to which auxiliary power is added for carrying heavy objects such as large tools. Things.

[0002]

2. Description of the Related Art Conventionally, as a wagon of this type, FIG.
(A) As shown in FIG.
Use a small manual wagon w with
They carry relatively small, light props, but they are big,
In order to carry heavy props, a plurality of these small manual wagons w are combined, and as shown in FIG. 4B, large wagons W are used to carry heavy goods such as props. .

As another conventional example, as shown in FIG. 5, a drive motor 17 installed under the stage floor (not shown),
There is a power type wagon w which pulls and drives a wagon w with casters on the stage by a drive sprocket 18 and a drive chain 19 to carry a heavy object such as a tool.

[0004]

By the way, in the above-mentioned conventional manual wagon, a plurality of small manual wagons are combined to increase the size, and a heavy object such as a tool is mounted on the enlarged wagon. Although it is made to move, heavy heavy tools can not be moved manually as it is heavy to carry it, and there is a problem that labor and time are considerably required, and workability is very poor. . In the case of a power wagon driven by a drive motor, a drive sprocket, and a drive chain installed under the stage floor, a large-sized tool such as a prop is used to move the power wagon. Although it is designed to be used, it can be moved without the need for manpower or time.However, the number of heavy props is smaller than that of small props, and the frequency of use is small. Since there are few, there is a problem that the use efficiency is very poor, and there is an inconvenience that the user can only move to a fixed direction and position where it is installed.

[0005] Therefore, the present invention is to run relatively small and light props by themselves, or to carry large and light props by manually driving several wagons in combination. Auxiliary power mechanism that can be used widely from heavy props to small props so that heavy props can be run with auxiliary power to carry heavy props etc. The purpose is to provide a wagon.

[0006]

According to a first aspect of the present invention, in a wagon having a main body frame and a freely movable caster provided on the main body frame, an auxiliary power mechanism is provided on the main body frame so that the weight of a load can be reduced. Activate the auxiliary power when is large.

In the second aspect of the invention, the auxiliary power mechanism includes an electric motor with a speed reducer mounted on the main body frame, an electric actuator oscillatably mounted, and an elevating / lowering unit engaged with the electric actuator and oscillatably provided. It comprises a link, a traveling wheel mounted on the lifting link, a connecting member for coupling the traveling wheel and the electric motor with a speed reducer, and control means for controlling the electric motor with a speed reducer and the electric actuator.

In the third aspect, the lifting link includes the second and third brackets provided on the main body frame, and the main link which is pivotally supported on a shaft provided on the second and third brackets. A first sub-link, a second sub-link provided to be swingable about an axis provided on the other end side of the main link, and a first sub-link and a second sub-link made to be swingable. The main link is pivoted vertically by pivoting and pivoting.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In the wagon w with an auxiliary power mechanism according to this embodiment, as shown in FIG. 1, reference numeral 1 denotes a main body frame formed for mounting a stage tool (not shown).

Reference numeral 2 denotes a swivel caster which is attached to the lower side of the main body frame 1 and allows the main body frame 1 to run in a free direction.

Reference numeral 3 denotes an electric motor with a speed reducer.

Reference numeral 4 denotes an electric actuator (cylinder) mounted on the first bracket 5a attached to the lower side of the main body frame 1 so as to swing about one end 4a about a shaft 6a provided on the first bracket 5a. 4 other end 4
b is engaged with the lifting link 7.

As shown in FIG. 2, the lifting link 7 has the second and third brackets 5b and 5c attached to the lower side of the main body frame 1, and has a shaft 6b provided on the second bracket 5b as a center. A main link 8 rotatably provided at one end thereof, a first sub link 9 provided rotatably at one end thereof about a shaft 6c provided at the third bracket 5c, and a main link 8 The first sub-link 9 engages with a shaft 6d provided on the other end side of the
Second sub-link 1 pivotally supported by a shaft 6e so as to be able to swing
It consists of 0.

A traveling wheel 11 is mounted on a main link 8 of the elevating link 7. The traveling wheel 11 is connected to a universal joint 12 as a connecting member and a telescopic shaft 1.
The drive wheel 3 is connected to an output shaft 3a of the motor 3 with a speed reducer via a motor 3 so that the running wheel 11 is driven by the rotation output of the motor 3 with a speed reducer.

The elevating link 7 swings a shaft 6e, which engages with the first and second sub-links, at the distal end 4b of the electric actuator 4 in the left-right direction in the drawing by the expansion and contraction operation of the electric actuator 4, thereby forming a main link. 8 rotates vertically around a shaft 6b provided on the second bracket 5b,
The traveling wheels 11 provided on the main link 8 can be raised and lowered and lowered.

The electric motor with speed reducer 3 and the electric actuator 4 are connected to a control panel 15 as shown in the block diagram of FIG. And the motor 3 with a speed reducer is connected to the traveling wheel 1 via a universal joint 12 and a telescopic shaft 13 as connecting members.
1 and the electric actuator 4 rotates the main link 8 of the lifting link 7 downward so that the traveling wheel 11 is in contact with the stage floor, and the wagon w is driven by the auxiliary power. The auxiliary power mechanism F is configured as described above.

Next, the operation will be described. Now
For a small and light tool to be moved, one wagon is used. For a large but relatively light tool, a plurality of wagons are combined and manually moved to a target place.

If the tool to be moved has a considerable weight, the operation button 14 is operated, and when power is supplied from the power supply 16 via the control panel 15 by the operation button 14, the motor 3 with the reduction gear and the electric motor Actuator 4 operates and universal joint 1 connected to motor 3 with reduction gear
2. The running wheel 11 is rotated and driven via the telescopic shaft 13, while the main link 8 of the lifting link 7 is rotated downward by the extension operation of the electric actuator 4,
The running wheels 11 mounted on the main link 8 are in contact with the floor of the stage, and the wagon w can be driven by the assisting power and the human hand to easily carry a heavy object to a predetermined position.

When the heavy object comes to a predetermined position, the operation button 14 is turned off, and the power supply from the control panel 15 is cut off.
The electric motor 3 with the reduction gear stops operating, and the traveling wheel 11 also stops without being rotated and driven via the universal joint 12 and the telescopic shaft 13 connected to the electric motor 3 with the reduction gear. The wagon w is stopped at a predetermined position in a state where the running wheels 11 attached to the main link 8 are in contact with the floor of the stage while stopping in the extension operation state.

Then, at the position where the wagon w is stopped, a tool or the like is lowered by using a crane, a lift or the like (not shown).

When the props or the like are lowered, the operation buttons 14
When the main link 8 of the elevating link 7 rotates upward, the running wheels 11 attached to the main link 8 are separated from the floor of the stage, and the wagon w is set to a state where the auxiliary power does not act. The wagon is manually driven and stored.

As described above, in the stage wagon w having the freely movable casters 2 provided on the main body frame 1, when the auxiliary power mechanism F is provided on the main body frame 1 and the weight of the loaded tool is large. Since the auxiliary power is activated, heavy tools that cannot be moved by hand due to their heavy weight can be easily moved to the desired position, requiring time and labor. In addition, the workability is greatly improved, and this wagon can be combined with multiple wagons without auxiliary power to make it larger, large-sized wagons can be loaded with heavy items such as large tools, and less frequently used It can be used widely from heavy props to small props, and can also increase the efficiency of use.

The auxiliary power mechanism F is connected to the main frame 1
, An electric actuator 4 rotatably mounted on the motor 3, an elevating link 7 engaged with the electric actuator 4 and rotatably provided, and a traveling wheel mounted on the elevating link 7. 11, a universal joint 12, a telescopic shaft 13, which is a connecting member for connecting the traveling wheel 11 and the motor 3 with a speed reducer, and control means 14, 15, 16 for controlling the motor 3 with a speed reducer and the electric actuator 4. Therefore, most can be constituted by commercially available products, and can be easily obtained and manufactured, and can be manufactured at low cost.

Further, the lifting link 7 is connected to the second and third brackets provided on the main body frame 1 and the second bracket 5b.
A main link 8 pivotally supported about a shaft 6b provided on the third bracket 5c, a first sub-link 9 pivotally supported about a shaft 6c provided on a third bracket 5c, A second sub-link 10 provided to be swingable about a shaft 6d provided on the other end side of the link 8, and a first sub-link 9 and a second sub-link 10 are swingably connected to a shaft 6e. Support
Since the main link 8 is configured to rotate in the vertical direction by swinging the shaft 6e, the number of components is small, and the traveling wheels can be reliably moved up and down by a simple mechanism.

[0026]

According to the first aspect of the present invention, there is provided a wagon having a freely movable caster provided on a main body frame, wherein an auxiliary power mechanism is provided on the main body frame so that the weight of an object to be loaded is large. Since the auxiliary power was activated, heavy tools that could not be moved by hand due to their heavy weight could be easily moved to the required position, requiring labor and time. In addition, the workability is greatly improved, and this wagon can be combined with multiple wagons without auxiliary power, making it possible to increase the size of the wagon and load heavy objects such as large tools on the larger wagon, and use it less frequently It can be used widely from heavy props to small props,
There is also an effect that the use efficiency can be improved.

According to the second aspect of the present invention, the auxiliary power mechanism is provided with a motor with a speed reducer mounted on the main body frame, an electric actuator oscillatably mounted, and an oscillating engagement with the electric actuator. The lifting link, a traveling wheel mounted on the lifting link, a connecting member for coupling the traveling wheel and the electric motor with a speed reducer, and control means for controlling the electric motor with a speed reducer and the electric actuator. So it can be mostly made up of commercially purchased products,
This has the effect of being easy to manufacture and inexpensive.

According to the third aspect of the present invention, the elevating link comprises a second and third brackets provided on the main body frame and a main shaft pivotally supported about axes provided on the second and third brackets. The link and the first sub-link, the second sub-link provided to be swingable about an axis provided on the other end side of the main link, and the first and second sub-links are swung. Since the main link is configured to pivot in the vertical direction by pivotally supporting and swinging as much as possible, there is an effect that the number of components is small and the traveling wheels can be reliably moved up and down by a simple mechanism.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a wagon with an auxiliary mechanism showing an embodiment of the present invention.

2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is a block diagram similarly.

FIG. 4 (a) is a perspective view showing a conventional wagon. (B) It is a reduced perspective view which combined the wagon similarly.

FIG. 5 is a perspective view showing another conventional wagon.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body frame 2 Free caster 3 Electric motor with reduction gear 4 Electric actuator 5a, 5b, 5c Bracket 6a, 6b, 6c, 6d, 6e Shaft 7 Elevating link 8 Main link 9 First sub-link 10 Second sub-link 11 Travel Wheels 12 universal joint 13 telescopic shaft 14 operation button 15 control panel 16 power supply 17 drive motor 18 sprocket 19 drive chain F auxiliary power mechanism w wagon

Claims (3)

[Claims] 1. A wagon having a main body frame and a freely movable caster provided on the main body frame,
A wagon with an auxiliary power mechanism, wherein an auxiliary power mechanism is provided on a main body frame, and the auxiliary power is operated when the weight of an object to be loaded is large. 2. The auxiliary power mechanism includes: a motor with a speed reducer mounted on a main body frame; an electric actuator rotatably mounted; an elevating link engaged with the electric actuator and rotatably provided; 2. The vehicle according to claim 1, further comprising a traveling wheel mounted on the lifting link, a connecting member for coupling the traveling wheel and the electric motor with a speed reducer, and control means for controlling the electric motor with the speed reducer and the electric actuator.
A wagon with an auxiliary power mechanism according to item 1. 3. The first link according to claim 1, further comprising a second bracket provided on the body frame, a main link pivotally supported on a shaft provided on the second and third brackets, and a first link.
Sub-link, a second sub-link provided to be pivotable about an axis provided at the other end of the main link, and a first sub-link and a second sub-link pivotally supported. The wagon with an auxiliary power mechanism according to claim 2, wherein the main link is vertically rotated by swinging.