JP3580360B2 - Power assisted mobile shelf - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of a power-assisted movable shelf that can operate a movable shelf with a sense of manual operation even though the drive source is an electric motor, and can extremely simplify a circuit configuration. It is a smoother one.
[0002]
[Prior art]
When a plurality of movable shelves can be moved by traveling wheels, a work passage can be formed only on the front of the shelves where articles are to be taken in and out. Can be gathered, so that there is an advantage that a limited space can be efficiently used as an article storage space.
As a drive form of the moving shelf, generally, by manually rotating a rotary operation handle, a rotational force is transmitted to the traveling wheels via a power transmission mechanism having a speed reduction mechanism, and the traveling wheels are driven. It can be broadly divided into a rotary operation handle type that is driven by rotation and an electric type that uses the driving force of a motor.
[0003]
According to the rotary operation handle type movable shelf, the rotational force of the rotary operation handle is transmitted to the traveling wheels via a power transmission mechanism having a speed reduction mechanism, so that even a relatively large movable shelf can be moved manually. be able to. Further, it is also possible to push and move a plurality of moving shelves by rotating a rotating operation handle of one moving shelf. However, there is still a limit in human power, and a considerable force is required to move a large, heavy moving shelf by operating the rotary operation handle. In particular, in recent years, mobile shelves have been increasingly installed in libraries and the like, and women have more opportunities to operate the mobile shelves. For a weak woman, manually moving a large mobile shelf is a heavy burden.
[0004]
On the other hand, in the case of the electric movable shelf, a motor having an output according to the size of the movable shelf is attached, so that the operator can easily operate regardless of female or male. However, when a command indicating that a work passage is to be formed between specific movable shelves is issued, the electric movable shelf has a relationship between a position at which a work passage is to be formed and a position of a space in which the movable passage can be moved. It is necessary to determine the moving shelf to be moved and the moving direction thereof, and based on this, control the energization of the motor of each moving shelf and control the rotation direction, which complicates a control circuit or control software. Further, it is necessary to detect and stop when there is no more space to be moved for each moving shelf. Further, when there is an operator or an obstacle in the moving space, it is necessary to detect and stop it. In addition, various detection circuits and control circuits for ensuring safety or protecting the motor are required, and the cost is considerably higher than that of the rotary shelf with a movable handle.
[0005]
From a different viewpoint, the moving distance of each moving shelf is at most 1 m on average, and moves only linearly along the guide rail. Further, the maximum moving speed is about 4 km / h, which is only a speed at which a human walks. In this way, despite the fact that the movable shelf is a very simple movement, the motorized type requires complicated control and sufficient safety measures, so the circuit configuration or control software There is a drawback that the wear becomes complicated and the cost increases. In addition, the conventional moving shelf has a slow moving speed and forms a work passage of about 900 mm to 1000 mm. However, a rotating operation handle type moving shelf takes about 8 seconds, and an electric moving shelf takes about 16 seconds. The work efficiency was not good because the operator had to wait while the user needed it.
[0006]
Therefore, the present applicant has invented a moving shelf of a unique drive system called a power assist type moving shelf, and has previously applied for a patent. The invention according to Japanese Patent Application No. 2000-55198 is a motor comprising traveling wheels, a DC motor for rotating the traveling wheels forward and reverse to reciprocate the movable shelf, and operation provided on the movable shelf on both sides in the moving direction. When the switch and one of the operation switches are operated, power is supplied such that the motor is driven in one direction, and when the other of the operation switches is operated, the motor is driven in the opposite direction. A power supply circuit.
[0007]
[Problems to be solved by the invention]
According to the invention according to the above-mentioned application, it is possible to provide a power-assist type moving shelf with a simple circuit configuration and a low cost, since the judgment of the moving control is left to a human. Further, quick movement is enabled, the waiting time when forming the passage can be shortened, and the working efficiency can be improved.
[0008]
However, the invention according to the above application has the following problems to be improved.
When trying to move a plurality of moving shelves at the same time, if one moving shelf tries to push and move another moving shelf, a large load is applied to one moving shelf. Assuming that the moving shelves are 1.8 tons, the limit was to move five moving shelves.
When an attempt is made to form a work passage having a predetermined width, for example, a width of 900 mm, the time required for forming the work passage is about 4 to 5 seconds when only one moving shelf is moved. It took 8 to 10 seconds to move the, and there was a problem that the passage forming speed was reduced.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a power-assisted movable shelf capable of simultaneously moving a large number of movable shelves.
It is another object of the present invention to provide a power-assisted movable shelf that allows each shelf to be quickly moved to quickly form a passage even when a large number of movable shelves are moved at the same time.
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is provided with a traveling wheel, a DC motor that reciprocates the movable shelf by rotating the traveling wheel forward and reverse, and provided on the movable shelf on both sides in the moving direction. The right-hand operation switch and the left-hand operation switch, and when the right-hand operation switch is operated, the motor is driven to operate the left-hand operation switch so as to move the movable shelf toward the right. A power-assisted moving shelf provided with a drive circuit for driving the motor in the reverse direction so as to move the moving shelf toward the left, wherein one power-assisted moving shelf is used for another power-assisted moving. A plurality of power-assisted mobile shelves are arranged so that shelves can be pushed and moved, and one power-assisted mobile shelf can be operated to the right by operating the rightward operation switch. A signal transmission means for transmitting a rightward signal to a certain shelf, and transmitting a leftward signal to a shelf on the left side of the movable shelf by operating a leftward operation switch of one power assisted movable shelf, In a shelf to which a rightward signal or a leftward signal has been transmitted from a shelf, the drive circuit supplies less power to a motor of the shelf than power supplied to a shelf that pushes another shelf. And
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, in a shelf to which a rightward signal or a leftward signal has been transmitted from another shelf, a drive circuit pushes another shelf by a motor of the shelf. It is characterized in that power less than power supplied to a moving shelf is supplied for a short time.
According to a third aspect of the present invention, in the first or second aspect of the present invention, the power that is less than the power supplied to a shelf that pushes another shelf is power that cannot be started by the shelf alone. It is characterized by.
A fourth aspect of the present invention is characterized in that, in the first, second or third aspect of the present invention, the power supply to the motors of the respective shelves is stopped by the input of the emergency stop signal.
[0011]
According to a fifth aspect of the present invention, in the first aspect of the invention, each movable shelf has a DC power supply circuit, and the DC power supply circuit of each movable shelf can supply power to a motor of another movable shelf. It is characterized by being connected in parallel so that it can be performed.
According to a sixth aspect of the present invention, in the first aspect of the present invention, a direct-current power supply circuit including a solar panel and a battery for storing power generated by the solar panel is provided.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a power-assisted movable shelf according to the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 2 indicates a moving shelf. In the example shown in FIG. 2, five movable shelves 2 are movably arranged. In FIG. 2, the first moving shelf 2 is A, the second moving shelf 2 is B, the third moving shelf 2 is C, the fourth moving shelf 2 is D, and the fifth moving shelf 2 is E. . Each of these movable shelves 2 has running wheels 8 before and after running stitching at the bottom, and has a motor 52 for rotating and driving each running wheel. The traveling wheels 8 rotate on rails laid on the floor, and the moving shelves 2 can move by being guided by the rails.
[0013]
In the example shown in FIG. 2, the front surface of each movable shelf, that is, the article loading / unloading surface is oriented in a direction perpendicular to the plane of the paper, and each movable shelf moves in a direction perpendicular to the front surface (the left-right direction parallel to the paper). Has become. In this specification, the front face of each movable shelf is referred to as a right side face or a left side face, and the face on which the operation unit appears as shown in FIG.
[0014]
Each of the motors 52 is a DC motor having a characteristic that a maximum torque can be obtained at the time of start-up. The motor 52 rotates forward and reverse by switching the polarity of a DC power supply to rotate each traveling wheel 8 forward and reverse. The movable shelf can be moved back and forth. Operation switches 4 and 6 are provided on both sides of the moving shelf in the moving direction. In the illustrated example, a side panel is attached to the front of each moving shelf 2, and operation switches 4 and 6 are provided at front and rear ends of the side panel in the moving shelf traveling direction. The operation switch 4 is a rightward operation switch that is pushed rightward when the moving shelf 2 is to be moved to the right. The operation switch 6 is leftward when the moving shelf 2 is to be moved to the left. It is a leftward operation switch to be pressed.
[0015]
Next, an electric circuit built in each movable shelf 2 will be described with reference to FIG. In FIG. 3, reference numeral 20 indicates a circuit board built in each movable shelf 2. The circuit board 20 has terminals 21, 22, 23, 24 connected to the circuit board 20 of the moving shelf 2 adjacent on the left side, and the terminal 31 connected to the circuit board 20 of the moving shelf 2 adjacent on the right side, 32, 33, and 34. The terminal 21 is a DC power supply introduction terminal. For example, DC 24 V is introduced from an appropriate DC power supply and is connected to the terminal 31. The terminal 24 is a ground terminal and is connected to the terminal 34. Further, the circuit board 20 includes a central processing unit (hereinafter, referred to as “CPU”) 50, a DC / DC converter 53, and a drive circuit 54. The drive circuit 54 supplies power to the motor 52 based on the control of the CPU 50 and drives the motor 52 to rotate in the normal and reverse directions. The DC / DC converter 53 converts the 24 VDC power supply into a voltage suitable as a power supply for the CPU 50 and stably holds the voltage. The DC / DC converter 53 is supplied with 24 V DC power from an AC / DC converter 55 that converts commercial AC power into DC.
[0016]
The right-hand operation switch 4 and the left-hand operation switch 6 described with reference to FIG. 2 are connected to the CPU 50, and further, an emergency stop switch 56 is connected. The emergency stop switch 56 may be, for example, a switch that is manually operated in an emergency, or a switch that is installed on the front face of the movable shelf 2 and that operates when a human body or other foreign matter comes into contact. Good. The CPU 50 controls the drive circuit 54 by operating the rightward operation switch 4, drives the motor 52 so that the movable shelf 2 moves rightward, and simultaneously outputs a rightward signal. . This rightward signal is introduced from the terminal 23 to the circuit board 20 of the movable shelf 2 adjacent to the right side from the terminal 33. The CPU 50 controls the drive circuit 54 by operating the leftward operation switch 6, drives the motor 52 so that the movable shelf 2 moves leftward, and outputs a leftward signal at the same time. ing. This leftward signal is introduced from the terminal 33 to the circuit board 20 of the movable shelf 2 adjacent to the left side from the terminal 23.
[0017]
When a leftward signal is input from another movable shelf through the terminal 32, the CPU 50 controls the drive circuit 54 to drive the motor 52 so that the movable shelf 2 moves leftward and output a leftward signal. Then, the signal is transmitted from the terminal 22 to the moving shelf on the left side. Similarly, when a rightward signal is input from another movable shelf via the terminal 23, the CPU 50 controls the drive circuit 54 to drive the motor 52 so that the movable shelf 2 moves rightward, and also outputs a rightward signal. Is transmitted from the terminal 33 to the moving shelf on the right side.
[0018]
When the rightward operation switch 4 or the leftward operation switch 6 of the movable shelf 2 is operated, the CPU 50 controls the drive circuit 54 so that the DC motor 52 of the movable shelf 2 is operated at the rated output. . On the other hand, when a right going signal or a left going signal is input from another moving shelf, the CPU 50 operates the DC motor 52 of the moving shelf 2 by operating the right going operation switch 4 or the left going operation switch 6. Power that is less than the power supplied to the shelves that move the other shelves, for example, power that cannot move the movable shelf 2 alone, or that the movable shelf 2 moves alone. However, the driving circuit 54 is controlled so that power is supplied to the extent that it is driven at a speed lower than the moving speed of the shelf that pushes the other shelves. Assuming that the rated output of the DC motor 52 is obtained by supplying a current of 6 A at 24 V, for example, the power at which the movable shelf 2 cannot start moving alone supplies a current of about 2 A at 24 V. Can be obtained.
[0019]
The circuit board 20 built in each moving shelf 2 has the same circuit configuration as that shown in FIG. 3, and terminals 21, 22, 23, and 24 are terminals 31 of the circuit board 20 of the moving shelf 2 adjacent to the left side. 32, 33, and 34, and the terminals 31, 32, 33, and 34 are connected to the terminals 21, 22, 23, and 24 of the circuit board 20 of the movable shelf 2 adjacent to the right side. In this manner, when the rightward operation switch 4 of a certain moving shelf 2 is operated to generate a rightward signal, the rightward signal is transmitted to the moving shelf 2 located on the right side of the shelf and the circuit board 20 is moved to the right side. Is transmitted via When a leftward operation signal is generated by operating the leftward operation switch 6 of a certain moving shelf 2, the leftward signal is transmitted to the moving shelf 2 located on the left side of the shelf via the circuit board 20. Is transmitted.
[0020]
FIG. 1 shows the operation of the embodiment configured as described above. Each operation step is denoted by a reference numeral such as "S1,""S2," or "S3." In FIG. 1, it is checked whether or not the emergency stop switch 56 shown in FIG. 3 is turned on while the moving shelf is stopped (S1) (S2). If the emergency stop switch 56 is not on, that is, if it is not an emergency, it is checked whether the rightward operation switch 4 is on (S3). If the rightward operation switch 4 is on, the output current is set to 6 A (S4), and the motor 52 is operated at the rated output so that the movable shelf 2 runs to the right (S5).
[0021]
If the rightward operation switch 4 is not on in S3, it is checked in S6 whether the rightward signal is on. Here, whether or not the right-going signal is on in S6 means whether or not a right-going signal is being input from another moving shelf, and in the case where a right-going signal is being input from another moving shelf. Sets the output current to 2 A (S7), and supplies the electric power to the motor 52 such that the movable shelf 2 cannot move alone and the moving shelf 2 runs to the right.
[0022]
If the rightward signal is not on in S6, it is checked in S8 whether the leftward operation switch 6 is on. If the leftward operation switch 4 is on, the output current is set to 6 A (S9), and the motor 52 is operated at the rated output so that the movable shelf 2 travels to the left (S10).
[0023]
If the leftward operation switch 6 is not on in S8, it is checked in S11 whether the leftward signal is on. Here, whether or not the left-going signal is on in S11 is whether or not a left-going signal is being input from another moving shelf, and if a left-going signal is being input from another moving shelf. Sets the output current to 2 A (S12), and supplies to the motor 52 electric power that is such that the movable shelf 2 cannot start moving alone and that is directed to the direction in which the movable shelf 2 runs to the left.
[0024]
If the leftward signal is not on in S11, the process returns to S2, and the above operation is repeated.
If the emergency stop switch 56 is operated while the moving shelf 2 is moving, the operation of the emergency stop switch 56 is performed, for example, after the above steps S4, S7, S8, and S12 so that the power supply to the motor 52 is stopped immediately. There should be a step to check.
[0025]
According to the embodiment described above, a DC motor that reciprocates the movable shelf by rotating the traveling wheels forward and reverse, a rightward operation switch and a leftward operation switch provided on the movable shelf on both sides in the moving direction, When operating the right-going operation switch, drive the DC motor to move the moving shelf to the right, and when operating the left-facing operation switch, move the moving shelf to the left. A power-assisted mobile shelf provided with a drive circuit for driving a motor in a reverse direction, wherein a plurality of power-assisted mobile shelves can be moved by one power-assisted mobile shelf. On the shelf to which a right-going signal or left-going signal has been transmitted from another shelf, the motor of that shelf is less than the power supplied to the shelf that pushes the other shelf. Since no power, for example, power that cannot be started by the shelf alone is supplied, when one moving shelf pushes another moving shelf, the load on the one moving shelf is reduced. It is now possible to push more moving shelves with one moving shelf. Further, even when one moving shelf pushes and moves many other moving shelves, a passage having a predetermined width can be formed in a short time.
[0026]
The reason why the power supplied to the DC motor on the shelf to which the rightward or leftward signal was transmitted from the other shelf was smaller than the power supplied to the shelf for pushing the other shelf is that one moving shelf was used. In order to prevent a gap from being created between the moving shelves by the other shelves pushed by moving ahead, the aim is to move one moving shelf with another moving shelf It depends. Therefore, the power supplied to the DC motor on the shelf to which the rightward or leftward signal has been transmitted from the other shelf (shelf for pushing the other shelf) is such that the shelf alone cannot start moving. Alternatively, the moving shelf 2 can move alone, but the power may be such that the moving shelf 2 is driven at a speed lower than the moving speed of the shelf that pushes the other shelf.
[0027]
In addition, the most energy is required at the time of starting the moving shelf, and once it starts to move, since the energy required after that is small, the shelf to which the rightward signal or the leftward signal is transmitted from the other racks, The time for supplying electric power to the DC motor that cannot be started by the shelf alone may be only a short time until the shelf starts to move.
In FIG. 2, the rightward operation switch 4 of the center movable shelf 2 of the five movable shelves 2 is operated, and the motor 52 of the movable shelf 2 is driven to move the movable shelf 52 rightward. The two moving shelves 52 located on the right side of the moving shelves 52 are shown as being pushed and moved. The left moving shelf 2 may be moved leftward by operating the leftward operation switch 6. This makes it possible to quickly form a work passage having a desired size at a desired position.
[0028]
Next, various modifications applicable to the present invention will be described.
As shown in FIG. 4, a DC power supply circuit 60 is provided in each moving shelf 2, a commercial AC power supply is drawn into each DC power supply circuit 60 and converted into a DC power supply of a predetermined voltage. Are connected in parallel to supply power from the DC power supply circuit 60 of one moving shelf 2 to the DC motor 52 of the other moving shelf 2.
[0029]
With such a configuration, when one moving shelf pushes another moving shelf, the load is not concentrated on the DC power supply circuit 60 of the one moving shelf, and the DC power supply circuit of the other moving shelf is moved. Since the electric power is also supplied from the moving shelf 60, the capacity of the DC power supply circuit 60 in each moving shelf can be reduced, so that the weight and cost of the circuit can be reduced. Further, if a DC power supply circuit 60 is provided for each block having a predetermined number of moving shelves, a DC power supply having a considerably large capacity is required. However, according to the above embodiment, one DC power supply circuit 60 is provided. Since the DC power supply circuits 60 are distributed to one moving shelf and each DC power supply circuit 60 can be reduced in size, the weight and cost of the circuit can be reduced from this point as well.
[0030]
FIG. 5 shows still another modification, in which a DC power supply circuit includes a solar panel 60 and a secondary battery 62 for storing power generated by the solar panel 60. The solar panel 60 is configured in such a manner that a large number of solar cell modules are configured in series and in parallel to obtain a predetermined output, and is installed outdoors where sunlight is well exposed. The output terminal of the solar panel 60 is connected to a secondary battery 62 via a diode 61 for preventing backflow, so that electric power generated by the solar panel 60 is stored in the secondary battery 62. The battery 62 is used as a DC power source for the moving shelf described above, and the power stored in the battery 62 is used as a power source for driving the DC motor and also as a power source for the CPU 50 and the like shown in FIG. You.
[0031]
The DC power supply including the solar panel 60 and the secondary battery 62 may be used as a main power supply of the movable shelf 2 or may be used as an auxiliary power supply. In any case, by using such a power supply, power saving of the movable shelf can be achieved.
[0032]
In the embodiment described above, a push button switch (push switch) is assumed as the rightward operation switch and the leftward operation switch, but a pull switch may be used. That is, a pull switch as a rightward switch is provided on the right side of the moving shelf, and a pull switch as a leftward switch is provided on the left side. To move the moving shelf toward the right, push the rightward switch toward the right. When pulling and moving the moving shelf to the left, pull the leftward switch toward the left.
Further, at least one of the front and rear wheels in the traveling direction of the movable shelf may be connected by a through shaft to be used as a drive shaft, and the rotational driving force of the DC motor may be transmitted to a longitudinal center portion of the drive shaft. In this case, the amount of torsion of the shaft at the time of driving becomes substantially equal on both sides in the axial direction, so that the skew of the movable shelf can be reduced and smooth running can be realized.
[0033]
【The invention's effect】
According to the first aspect of the present invention, in the power assisted movable shelf, a plurality of power assisted movable shelves are arranged so that one power assisted movable shelf can push and move another power assisted movable shelf. By operating the right-going operation switch of one power-assisted mobile shelf, a right-going signal is transmitted to the shelf on the right side of the mobile shelf, and by operating the left-going operation switch of one power-assisted mobile shelf. It has signal transmission means for transmitting a leftward signal to a shelf on the left side of the moving shelf, and a drive circuit of the shelf to which a rightward signal or a leftward signal has been transmitted from another shelf is connected to a motor of the other shelf. In order to supply less power than the power supplied to the shelves that push the shelves, even if one moving shelf pushes the other moving shelves, the above one that tries to push the other moving shelves It is possible to reduce the load on the movable rack can be moved a large number of mobile shelves simultaneously. Further, even when a large number of movable shelves are moved at the same time, each of the shelves can be quickly moved, and a rapid passage can be formed.
[0034]
According to the invention described in claim 2, in the invention described in claim 1, in a shelf to which a right-going signal or a left-going signal has been transmitted from another shelf, a drive circuit connects the other shelf with a motor of the shelf. Since less power is supplied for a short time than the power supplied to the shelves to be pushed, power is supplied to the motor of the shelves pushed by other shelves when the moving shelves that require the largest torque are started, and assisted Therefore, the same effect as the first aspect of the invention can be obtained.
The third aspect of the invention can also provide the same effect as the first or second aspect of the invention.
[0035]
According to the fourth aspect of the present invention, in the first, second or third aspect of the present invention, the power supply to the motor of each shelf is stopped by the input of the emergency stop signal. It is possible to ensure the safety of workers inside the building.
[0036]
According to the invention described in claim 5, in the invention described in claim 1, each moving shelf has a DC power supply circuit, and the DC power supply circuit of each moving shelf supplies power to a motor of another moving shelf. The DC power supply circuits of the moving shelves complement each other, and the size of each power supply circuit can be reduced.
[0037]
According to the fifth aspect of the present invention, in the first aspect of the present invention, a power assist type is provided because the DC power supply circuit includes a solar panel and a battery for storing power generated by the solar panel. The power saving of the moving shelf can be achieved.
[Brief description of the drawings]
FIG. 1 is a flowchart illustrating an operation example of a power-assisted movable shelf according to the present invention.
FIG. 2 is a front view showing an embodiment of a power-assisted movable shelf according to the present invention.
FIG. 3 is a block diagram showing an example of an electric system according to the embodiment.
FIG. 4 is a block diagram showing an example of a power supply circuit applicable to the present invention.
FIG. 5 is a block diagram showing another example of a power supply circuit applicable to the present invention.
[Explanation of symbols]
2 Moving shelf 4 Rightward operation switch 6 Leftward operation switch 8 Traveling wheel 52 DC motor 54 Drive circuit

Claims (6)

A traveling wheel, a DC motor for reciprocating the movable shelf by rotating the traveling wheel forward and reverse, a rightward operation switch and a leftward operation switch provided on the movable shelf on both sides in the traveling direction, and the rightward operation switch When the operation is performed, the motor is driven to move the moving shelf toward the right, and when the left operation switch is operated, the motor is reversed to move the moving shelf toward the left. A power-assisted moving shelf comprising a driving circuit for driving in a direction,
A plurality of power-assisted mobile shelves are placed so that one power-assisted mobile shelf can push and move another power-assisted mobile shelf,
By operating the above-mentioned rightward operation switch of one power-assisted movable shelf, a rightward signal is transmitted to a shelf on the right side of the movable shelf, and by operating the above leftward operation switch of one power-assisted movable shelf. Signal transmission means for transmitting a leftward signal to a shelf on the left side of the movable shelf,
In a shelf to which a rightward or leftward signal has been transmitted from another shelf, the drive circuit supplies less power to the motor of that shelf than to the shelf that pushes the other shelf. A power-assisted moving shelf characterized by the following. In a shelf to which a rightward signal or a leftward signal has been transmitted from another shelf, the drive circuit supplies the motor of that shelf with power less than the power supplied to the shelf that pushes the other shelf for a short time. The power-assisted movable shelf according to claim 1, wherein the movable shelf is supplied. The power-assisted mobile shelf according to claim 1 or 2, wherein the power less than the power supplied to the shelf that pushes another shelf is power that cannot be started by itself. 4. The power-assisted movable shelf according to claim 1, wherein power supply to a motor of each shelf is stopped by input of an emergency stop signal. 2. The power-assisted type according to claim 1, wherein each of the moving shelves has a DC power supply circuit, and the DC power supply circuits of the respective moving shelves are connected in parallel so that power can be supplied to the motors of the other moving shelves. Moving shelves. The power-assisted mobile shelf according to claim 1, further comprising a DC power supply circuit including a solar panel and a battery for storing power generated by the solar panel.

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