JP3657101B2 - Wagon with auxiliary power mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wagon for carrying tools used on the stage of a theater or the like, and more particularly to a wagon with an auxiliary power mechanism to which auxiliary power is added to carry heavy objects such as large tools.
[0002]
[Prior art]
Conventionally, as this type of wagon, as shown in FIG. 4A, a small manual wagon w in which a free caster 2 is attached to a main body frame 1 is used. Usually, a relatively small and light tool is used. While carrying, large, to carry props a heavy, multiple combination of the small hand-wagon w, as shown in FIG. 4 (b), in the large wagon w, the props and the like I carry heavy objects.
[0003]
As another conventional example, as shown in FIG. 5, a wagon w with casters on a stage is pulled and driven by a drive motor 17, a drive sprocket 18 and a drive chain 19 which are installed under a stage floor (not shown). There is a powered wagon w that carries heavy items such as large tools.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional manual wagon described above, a plurality of small manual wagons are combined to increase the size, and a heavy load such as a tool is mounted on the enlarged wagon to move. In order to carry a large tool, it was heavy manually and could not be moved as expected, requiring a lot of manpower and time, and the workability was very bad. In addition, a power wagon that is driven by a drive motor, drive sprocket, and drive chain installed under the stage floor is loaded with heavy items such as large tools, and is moved to a large size for power. It is designed to be used and can be moved without the need for human resources or time, but heavy tools are less in number than small tools and can be used frequently. Since there are few, utilization efficiency is very bad and there also exists a problem that there exists an inconvenience that it can move only to the fixed direction and position which were installed.
[0005]
Therefore, the present invention can be driven by a single unit when carrying a relatively small and light tool, or manually by combining several wagons when carrying a large tool that is light in weight. In addition, to carry heavy tools, etc., we provide a wagon with an auxiliary power mechanism that can be used widely from heavy tools to small tools so that you can travel using auxiliary power to improve workability. The purpose is to do.
[0006]
[Means for Solving the Problems]
In the first invention, in a wagon having a main body frame and a freely movable caster provided on the main body frame, the main body frame is provided with an auxiliary power mechanism, and the auxiliary power mechanism is attached to the main body frame with a speed reducer. An electric actuator that is swingably attached to the electric motor, a lifting link that is swingably engaged with the electric actuator, a traveling wheel that is attached to the lifting link, a traveling wheel, and a motor with a reduction gear are connected to each other. And a control means for controlling the electric motor with speed reducer and the electric actuator, and activates the auxiliary power when the weight of an object to be loaded is large.
[0008]
In the second invention, the elevating link includes the second and third brackets provided on the main body frame, the main link pivotally supported about the shaft provided on the second and third brackets, and the first link. A sub-link, a second sub-link that is swingable about a shaft provided on the other end side of the main link, and a first sub-link and a second sub-link are pivotally supported. By swinging, the main link is rotated in the vertical direction.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
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).
[0011]
A free caster 2 is attached to the lower side of the main body frame 1 and enables the main body frame 1 to travel in any direction.
[0012]
3 is an electric motor with a reduction gear.
[0013]
Reference numeral 4 denotes an electric actuator (cylinder) mounted on the first bracket 5 a attached to the lower side of the main body frame 1 so that the one end side 4 a can swing around the shaft 6 a. The end side 4 b is engaged with the lifting link 7.
[0014]
As shown in FIG. 2, the elevating link 7 has second and third brackets 5b and 5c attached to the lower side of the main body frame 1, and has one end side centered on a shaft 6b provided on the second bracket 5b. The main link 8 provided to be rotatable at the center, the first sub-link 9 provided to be rotatable at one end around the shaft 6c provided to the third bracket 5c, and the other end of the main link 8 The first sub-link 9 includes a second sub-link 10 that is pivotally supported by a shaft 6e so as to be swingably engaged about a shaft 6d provided on the side.
[0015]
A traveling wheel 11 is attached to the main link 8 of the elevating link 7, and the traveling wheel 11 is connected to the output shaft 3 a of the motor 3 with speed reducer via a universal joint 12 and a telescopic shaft 13 which are connecting members. The traveling wheel 11 is driven by the rotational output of the motor 3 with speed reducer.
[0016]
The elevating link 7 swings the shaft 6e engaged with the first and second sub links at the tip 4b of the electric actuator 4 by the expansion / contraction operation of the electric actuator 4 in the horizontal direction in the figure, so that the main link 8 The traveling wheel 11 provided on the main link 8 can be lifted up and down by rotating up and down around a shaft 6b provided on the second bracket 5b.
[0017]
As shown in the block diagram of FIG. 3, the motor 3 with speed reducer and the electric actuator 4 are connected to a control panel 15, and are provided with control means so that power is supplied from the power source 16 by the operation buttons 14 and operates. At the same time, the motor 3 with speed reducer rotates and drives the traveling wheel 11 via the universal joint 12 and the telescopic shaft 13 which are connecting members, and the electric actuator 4 moves the main link 8 of the elevating link 7 downward. The auxiliary power mechanism F is configured such that the wheel 11 is rotated and the traveling wheel 11 is grounded to the floor of the stage, and the wagon w is driven with auxiliary power.
[0018]
Next, the operation will be described. Now, if the tool to be moved is small and light, one wagon is used. If the tool is large but relatively light, a plurality of wagons are combined and moved manually to the target location.
[0019]
When the weight of the tool to be moved is significant, when the operation button 14 is operated and electric power is supplied from the power source 16 through the control panel 15 by the operation button 14, the motor 3 with speed reducer and the electric actuator 4 are The traveling wheel 11 is rotated and driven via the universal joint 12 and the telescopic shaft 13 that are operated and connected to the electric motor 3 with a speed reducer. On the other hand, the main link 8 of the elevating link 7 is driven by the extension operation of the electric actuator 4. The traveling wheel 11 mounted on the main link 8 touches the floor of the stage and rotates the wagon w with auxiliary power and manpower to easily carry a heavy object to a predetermined position. .
[0020]
When the heavy load comes to a predetermined position, when the operation button 14 is turned off, the power supply from the control panel 15 is cut off, the motor 3 with the speed reducer stops operating, and the universal joint 12 connected to the motor 3 with the speed reducer. The traveling wheel 11 also stops without being rotated and driven via the telescopic shaft 13, while the electric actuator 4 stops in the extended operation state, and the traveling wheel 11 attached to the main link 8 contacts the floor of the stage. In this state, the wagon w is stopped at a predetermined position.
[0021]
Then, at the position where the wagon w is stopped, a tool or the like is lowered using a crane, a lift, etc. (not shown).
[0022]
When a large tool or the like is lowered, the electric actuator 4 is contracted by the operation button 14 and the main link 8 of the elevating link 7 is rotated upward, so that the traveling wheels 11 attached to the main link 8 are separated from the floor of the stage, The wagon w is placed in a state where the auxiliary power is not applied, and the wagon is run and stored manually.
[0023]
Thus, in the stage wagon w having the freely movable caster 2 provided in the main body frame 1, the auxiliary power mechanism F is provided in the main body frame 1, and the auxiliary power is increased when the weight of the tool to be loaded is large. Because it was activated, even tools that could not be moved as expected because they were heavy by hand to carry heavy tools can be easily moved to a predetermined position, requiring no hands or time, Workability is greatly improved and this wagon can be combined with multiple wagons without auxiliary power to increase the size and load heavy items such as tools on the enlarged wagon. It can be used widely from tools to small large tools, and it can also improve the efficiency of use.
[0024]
The auxiliary power mechanism F includes an electric motor 3 with a speed reducer attached to the main body frame 1, an electric actuator 4 attached so as to be able to swing, and a lifting link 7 engaged with the electric actuator 4 and provided so as to be able to swing. And a traveling wheel 11 attached to the lifting link 7, a universal joint 12 that is a connecting member that connects the traveling wheel 11 and the motor 3 with a speed reducer, a telescopic shaft 13, a motor 3 with a speed reducer 3, and an electric actuator 4. Since most of the control means 14, 15, and 16 are configured to be commercially available products, they can be easily obtained and manufactured, and the cost can be reduced.
[0025]
Further, the elevating link 7 includes second and third brackets provided on the main body frame 1, a main link 8 pivotally supported around a shaft 6b provided on the second bracket 5b, and a third bracket. A first sub-link 9 pivotally supported about a shaft 6c provided on 5c, and a second sub-link provided on a shaft 6d provided on the other end side of the main link 8 so as to be swingable. The link 10, the first sublink 9 and the second sublink 10 are supported by a shaft 6e so as to be swingable, and the main link 8 is rotated in the vertical direction by swinging the shaft 6e. Therefore, the number of parts is small, and the traveling wheel can be moved up and down reliably with a simple mechanism.
[0026]
【The invention's effect】
According to the first aspect of the present invention, a wagon having a freely movable caster provided on a main body frame, the auxiliary power mechanism is provided on the main body frame, and the auxiliary power is operated when the weight of an object to be loaded is large. As a result, tools that were heavy and could not be moved by hand when carrying heavy tools could easily be moved to the specified position, requiring less labor and time, and having improved workability. A large-sized tool that is greatly improved and can be loaded with heavy items such as large tools by combining this wagon with multiple units of wagons without auxiliary power. Can be used in a wide range from small tools to small tools, and it has the effect of increasing the usage efficiency.
[0027]
The auxiliary power mechanism is attached to the motor with a speed reducer attached to the main body frame, the electric actuator attached so as to be able to swing, the lifting link engaged with the electric actuator so as to be swingable, and the lifting link. Most of the products are commercially available products, because they are composed of a traveling wheel, a connecting member that connects the traveling wheel and the electric motor with a reduction gear, and a control means that controls the electric motor with the reduction gear and the electric actuator. It can be configured, easily obtained and manufactured, and has the effect of being inexpensive.
[0028]
According to the second invention, the elevating link includes the second and third brackets provided on the main body frame, the main link pivotally supported about the shaft provided on the second and third brackets, and the first link. 1 sub-link, a second sub-link that can swing around a shaft provided on the other end of the main link, and a shaft that can swing between the first sub-link and the second sub-link Since the main link is configured to rotate up and down by supporting and swinging, the number of parts is small, and there is an effect that the traveling wheel can be moved up and down reliably with 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 cross-sectional view taken along arrow AA in FIG.
FIG. 3 is a block diagram of the same.
4A is a perspective view showing a conventional wagon. FIG.
(B) It is the 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 Swivel caster 3 Electric motor with reduction gear 4 Electric actuators 5a, 5b, 5c Brackets 6a, 6b, 6c, 6d, 6e Shaft 7 Lifting link 8 Main link 9 First sub link 10 Second sub link 11 Traveling Wheel 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 (2)

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, and the auxiliary power mechanism can swing with an electric motor with a speed reducer attached to the main body frame. An electric actuator attached to the electric actuator, an elevating link that engages and swings with the electric actuator, a traveling wheel attached to the elevating link, a connecting member that connects the traveling wheel and the motor with a speed reducer, A wagon with an auxiliary power mechanism, comprising a motor with a speed reducer and a control means for controlling an electric actuator , wherein the auxiliary power is operated when the weight of an object to be loaded is large. The elevating link includes second and third brackets provided on the main body frame, a main link and a first sub-link that are pivotally supported about an axis provided on the second and third brackets, and a main link. A second sublink that is swingable about an axis provided on the other end side of the link, and the first sublink and the second sublink are swingably supported so as to swing. The wagon with an auxiliary power mechanism according to claim 1 , wherein the main link is rotated in the vertical direction.

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