JP2003112807A - Stock taking truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stock taking truck with a power source taking stock of commodities in a store. SOLUTION: In this stock taking truck 1, a battery 3, a charger 4, a power source 6 having an inverter 5, and a personal computer electric outlet 7 are arranged on a truck frame 2. A personal computer 116 is placed on the truck frame 2, and pushed and moved by hand in a state being placed on the truck frame 2. An insertion plug of cord of the personal computer 116 is inserted to the personal computer electric outlet 7. The inverter 5 converts DC voltage to AC voltage, and the battery 3 is used as a power source of the personal computer 116. The charger 4 charges the battery 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inventory cart having a power source for inventorying products.

[0002]

2. Description of the Related Art Generally, in stores such as supermarkets, in order to settle and close accounts, the types, quantities, and quality of the products in stock in the stores are investigated, and the inventory is evaluated periodically to evaluate the prices. . In recent years, in stores such as supermarkets, stocktaking of products using a personal computer has been carried out.

However, when carrying out a stocktaking operation of a product using a personal computer, the power source of the personal computer was taken from an outlet installed in the store, so that the stocktaking work of the product by the personal computer in a large store is inconvenient. It was

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to mount a personal computer equipped with a bar code reader and a wireless LAN card on a bogie frame and to mount a bogie frame on the personal computer. Move it by hand as it is, insert the plug of the cord of the PC into the outlet for the PC, and the inverter of the power supply unit will convert the DC voltage to AC.
Converted to voltage, use the battery of the power supply as the power supply of the personal computer, even if the battery of the power supply becomes weak, the battery is charged by the charger and when performing the inventory work of the product using the personal computer Another object of the present invention is to provide an inventory cart that does not require the power source of a personal computer to be taken from an outlet installed in the store and can quickly carry out inventory work of products by the personal computer in a large store.

[0005]

[Means for Solving the Problems] The trolley for inventory according to the present invention comprises:
It is a trolley for inventory that carries a personal computer equipped with a bar code reader and a wireless LAN card and is moved by hand, and a trolley frame is provided with a power supply unit having a battery, a charger, an inverter, and a personal computer outlet. It has a structure characterized by.

In the inventory truck of the present invention, the power supply unit is arranged at the bottom or middle of the truck frame.

In the trolley for inventory according to the present invention, the power source section comprises a power source box for accommodating the battery, the charger and the inverter.

In the trolley for inventory according to the present invention, the outlet for the personal computer is arranged on the upper shelf of the trolley frame.

In the trolley for inventory according to the present invention, the power supply unit has a function of supplying electric power to the outlet for the personal computer arranged on the upper shelf of the trolley frame.

The stock truck of the present invention has a structure in which the personal computer fall prevention member can be mounted on the upper shelf of the cart frame.

In the trolley for inventory according to the present invention, the mouse pad is arranged on the upper shelf of the trolley frame.

In the trolley for inventory according to the present invention, a personal computer fall prevention edge is provided on the upper ledge of the trolley frame.

In the trolley for inventory according to the present invention, the trolley frame and the upper ledge are coated with an antibacterial agent for preventing the generation of bacteria.

In the trolley for inventory according to the present invention, the trolley frame and the upper rack have a static electricity removing mechanism for eliminating static electricity.

In the trolley for inventory according to the present invention, the trolley frame has an upper rack and an intermediate rack, and the height of the upper rack and the intermediate rack with respect to the truck frame can be freely set.

In the trolley for inventory according to the present invention, the upper rack of the trolley frame is provided with a handle.

The trolley for inventory according to the present invention is provided with a shock absorbing mechanism for absorbing a shock when the trolley frame moves.

The inventory cart of the present invention has a structure in which the power supply unit surrounds and shields the battery, the charger and the inverter.

In the trolley for inventory according to the present invention, the rack for mouse operation is arranged in the trolley frame so that it can be freely moved in and out.

The inventory truck of the present invention has a structure in which the upper shelf and the intermediate shelf of the truck frame are expandable.

The stock truck of the present invention has a structure in which the power supply unit radiates the heat generated from the battery, the charger and the inverter to the outside.

In the trolley for inventory of the present invention, the power supply unit has an indicator light for indicating whether the battery is being charged or the power is being supplied.

The stock truck of the present invention has a structure in which the power supply unit can input AC power.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a front view showing an inventory cart according to a first embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a right side view of FIG. 1, and FIG. 4 is a plan view of FIG. FIG. 5 is a plan view of relevant parts showing a state in which the power supply unit of the stock truck according to the first embodiment of the present invention is attached to the bogie frame. A personal computer 116 (FIG. 7) equipped with the barcode reader 114 and the wireless LAN card 115 of the present invention.
As shown in FIG. 1, a stocking cart 1 on which a cart 3 is placed and moved by hand is provided with a cart frame 2, a power source section 6 including a battery 3, a charger 4, and an inverter 5, and an outlet 7 for a personal computer. It is set up.

As shown in FIG. 1, a horizontal member 21a is provided between the lower end portions of the two vertical members 20a and the vertical member 20b which are parallel to each other on the carriage frame 2 of the stock truck 1.
Is crossed over.

As shown in FIG. 2, a horizontal member 21b is provided between the lower ends of the two vertical members 20a and the vertical member 20c, which are parallel to each other, of the carriage frame 2 of the stock truck 1.
Is crossed over.

As shown in FIG. 3, a horizontal member 21b is provided between the lower ends of the two vertical members 20b and the vertical member 20d which are parallel to each other on the carriage frame 2 of the stock truck 1.
A horizontal member 21c that is parallel to is horizontally installed.

As shown in FIGS. 2 and 3, a horizontal member 21a is provided between the lower ends of the two vertical members 20c and the vertical member 20d, which are parallel to each other, of the carriage frame 2 of the stock truck 1. A horizontal member 21d that is parallel to is horizontally installed.

At the lower ends of the four vertical members 20a, 20b, 20c, 20d of the carriage frame 2 of the stock truck 1, casters 22a, 22b with stoppers are provided at the lower ends of the four vertical members 20a, 20b, 20c, 20d, as shown in FIGS. 22c and 22d are mounted respectively.

As shown in FIGS. 1, 2 and 3, an upper shelf 8 is arranged at the uppermost stage of the carriage frame 2 of the stock truck 1, and the front edge and both sides of the horizontal plate 80 of the upper shelf 8 are arranged. As shown in FIG. 4, personal computer fall prevention edges 81a, 81b, 81c, 81d rising upward are integrally provided on the edge and the rear edge.

As shown in FIG. 4, a personal computer outlet 7 is provided above the corners of the horizontal plate 80 on one side edge and the rear edge of the upper shelf 8.

As shown in FIGS. 1, 2 and 3, an intermediate shelf 9 is arranged in the middle of the carriage frame 2 of the stock truck 1.

As shown in FIGS. 1, 2 and 3, a horizontal member 21a is provided at the bottom of the trolley frame 2 of the trolley for inventory 1.
The power supply unit 6 is disposed in the upper part between the horizontal member 21d and the horizontal member 21d.
The power supply unit 6 includes a power supply box 60 for accommodating the battery 3, the charger 4, and the inverter 5.

On the upper portion of the bottom plate 61 of the power source box 60 of the power source unit 6, as shown in FIG.
A charger 4 for charging the battery 3 and an inverter 5 for converting a DC voltage into an AC voltage are provided.

As shown in FIG. 1, the front plate 62 of the power supply box 60 of the power supply unit 6 has a large number of vent holes 62a (for discharging heat generated from the battery 3, charger 4 and inverter 5 to the outside). The front plate 62 of the power supply box 60 is made of a punching metal plate.

As shown in FIG. 2, a plug 64 is provided on the side plate 63 located on the left side of the power source box 60 of the power source unit 6.
An AC power input cord 64 having a, an AC power output outlet 65, an indicator light 66 for indicating that the battery 3 is being charged, and cord winding hooks 67, 67 are provided, respectively.

Inside the vertical member 20b of the trolley frame 2 of the trolley 1 for inventory, as shown in FIG. 2, a cord 70 for inputting the AC power of the outlet 7 for a personal computer along the vertical direction.
Is plugged in, and a plug (not shown) provided at the lower end of the AC power input cord 70 is connected to the power supply box 60 of the power supply unit 6.
It is inserted into an AC power output outlet 65 arranged on the side plate 63.

The upper part between the horizontal member 21a and the horizontal member 21d of the trolley frame 2 of the trolley 1 for inventory is shown in FIGS.
As shown in FIG. 3, the power supply box 60 of the power supply unit 6 is placed, and the horizontal member 21 a of the trolley frame 2 has the same structure as that shown in FIG.
As shown in FIG. 5, the front edge of the bottom plate 61 of the power supply box 60 is fixed by two fixing bolts 68a, 68a, and the horizontal edge 21d of the bogie frame 2 has a rear edge of the bottom plate 61 of the power supply box 60 of two. Book fixing bolts 68b, 68b
It is fixed by.

FIG. 6 is an electric circuit diagram of the power supply unit of the stock truck according to the first embodiment of the present invention. Inventory trolley 1
As shown in FIG. 6, the power supply unit 6 of the battery 3 includes a battery 3, a charger 4, an inverter 5, an AC power input cord 64 having an insertion plug 64a, an AC power output outlet 65, and an indicator light. 66, fuses 73 and 74, a relay 75, relay contacts 76 and 77 of the relay 75, and a diode 78.

When the battery 3 is being charged, the relay contact 76 is opened by the operation of the relay 75, and the relay contact 7
7 is switched from the battery side to the commercial side by the operation of the relay 75, and the AC power output outlet 65 is automatically switched to the commercial power source.

FIG. 7 is a block diagram showing a stocktaking operation management system for goods using the stocking cart of the present invention. As shown in FIG.
01 and the management center 102 are connected via the network 103 so as to transmit and receive the barcode information of the product,
Management center 102 and product shipping centers 104a, 104b
Are connected via the network 105 so as to transmit and receive the barcode information of the product.

As shown in FIG. 7, in the store 101, a plurality of product shelves 106 for displaying products to which product labels with bar codes are attached are installed.

The store 101, as shown in FIG.
Computer 108 with AN 107 and personal computer 1
09 and a database 110.

The management center 102, as shown in FIG.
Computer 111, personal computer 112, and database 1
Have 13.

Next, a method of using the inventory cart according to the first embodiment of the present invention will be described. First, as shown in FIG. 7, a personal computer 116 equipped with a bar code reader 114 and a wireless LAN card 115 is placed on the upper shelf 8 arranged on the uppermost stage of the trolley frame 2 of the inventory cart 1, and the personal computer 116 is By inserting an insertion plug (not shown) at the tip of a cord (not shown) into the outlet 7 for a personal computer arranged on the upper shelf 8, the battery 3 of the power supply unit 6 supplies power to the personal computer 116.

The store clerk 120 manually moves the stocking cart 1 on which the personal computer 116 is placed, and the bar code attached to the product label is read by the bar code reader 114 mounted on the personal computer 116, and the personal computer 116 is read. The installed wireless LAN card 115 transmits the barcode information of the product to the wireless LAN 107 of the computer 108 of the store 101, and the personal computer 116 of the product in the store 101 performs an inventory work.

During the stocktaking work of the products in the store 101 by the personal computer 116, the cord wrapping hook 6 is provided so that the AC power input cord 64 does not disturb the stocktaking work of the products.
It is wrapped around 7,67.

After the stocktaking work of the products in the store 101 by the personal computer 116 is carried out, the plug of the cord of the personal computer 116 is removed from the personal computer outlet 7 of the upper shelf 8 and the side plate 63 of the power source box 60 of the power source section 6 is removed. Store the installed plug 64a of the AC power input cord 64 in the store 1
By inserting into an outlet (not shown) installed in 01, the charger 4 of the power supply unit 6 charges the battery 3,
An indicator light 66 provided on the side plate 63 of the power supply box 60 of the power supply unit 6 lights up to indicate that the battery 3 is being charged.
The battery 3 is charged.

FIG. 8 is a front view showing an inventory truck according to the second embodiment of the present invention, FIG. 9 is a right side view of FIG. 8, and FIG.
0 is a plan view of FIG. As shown in FIG. 8 and FIG. 9, the inventory cart 1 of the present invention has a cart frame 2 provided with a power source section 6 including a battery, a charger and an inverter, and a personal computer outlet 7.

As shown in FIGS. 8 and 9, an upper shelf 8 is arranged at the uppermost stage of the trolley frame 2 of the trolley for inventory 1.
As shown in FIG. 1 on the front edge, both side edges and rear edge of the horizontal plate 80 of the upper shelf 8.
As shown in FIG. 0, personal computer fall prevention edges 81a, 81b, 81c, and 81d that rise upward are integrally provided.

As shown in FIGS. 8 and 9, the upper shelf 8 is provided with a handle 83 for gripping the inventory cart 1 by hand, and the handle 83 drops the personal computer of the upper shelf 8. It is fixed to the prevention edge 81a.

As shown in FIGS. 8 and 9, a mouse operation shelf 10 is arranged on the upper stage of the carriage frame 2 of the stock truck 1 so as to face the lower portion of the upper shelf 8 so as to be able to move in and out in the front-rear direction. A handle 11 is attached to the mouse operation shelf 10.

Since the other configurations of the inventory cart 1 according to the second embodiment of the present invention are substantially the same as those of the first embodiment shown in FIG. 1, the same parts are designated by the same reference numerals. The description is omitted.

Further, the method of using the inventory cart 1 according to the second embodiment of the present invention is the same as that of the first embodiment shown in FIG.

In the stock truck 1 of the present invention, the power supply unit 6 is arranged at the lowermost stage or the middle stage of the truck frame 2.

In the trolley 1 for inventory according to the present invention, the power supply unit 6 is composed of a power supply box 60 for accommodating the battery 3, the charger 4 and the inverter 5.

In the trolley for inventory 1 of the present invention, the outlet 7 for the personal computer is arranged on the upper shelf 8 of the trolley frame 2.

The stock truck 1 of the present invention has a function of supplying power to the personal computer outlet 7 arranged on the upper shelf 8 of the cart frame 2 by the power supply unit 6.

The trolley 1 for inventory according to the present invention comprises a trolley frame 2
The upper shelf 8 has a structure in which a personal computer fall prevention member can be mounted.

The inventory cart 1 of the present invention comprises a cart frame 2
A mouse pad (not shown) is provided on the upper shelf 8 of the.

The inventory cart 1 of the present invention comprises a cart frame 2
PC falling prevention edges 81a, 81b, 8 on the upper shelf 8
1c and 81d are provided.

In the trolley for inventory 1 of the present invention, the trolley frame 2, the upper ledge 8 and the intermediate ledge 9 are coated with an antibacterial agent for preventing the generation of bacteria.

The stock truck 1 of the present invention is equipped with a static electricity removing mechanism for removing static electricity from the cart frame 2, the upper shelf 8 and the intermediate shelf 9.

The inventory truck 1 of the present invention comprises a truck frame 2
Has an upper shelf 8 and an intermediate shelf 9, and has a structure in which the height of the upper shelf 8 and the intermediate shelf 9 with respect to the carriage frame 2 can be freely set.

The trolley for inventory 1 of the present invention comprises a trolley frame 2
The upper shelf 8 has a handle 83.

The inventory cart 1 of the present invention comprises a cart frame 2
Is equipped with a shock absorbing mechanism that absorbs shock during movement.

The inventory truck 1 of the present invention has a structure in which the power source section 6 surrounds and shields the battery 3, the charger 4 and the inverter 5.

The inventory cart 1 of the present invention comprises a cart frame 2
The mouse operation shelf 10 is arranged so as to be freely accessible.

The trolley for inventory 1 of the present invention comprises a trolley frame 2
The upper shelves 8 and the middle shelves 9 have an expandable structure.

The stock truck 1 of the present invention has a structure in which the power source section 6 radiates the heat generated from the battery 3, charger 4 and inverter 5 to the outside.

In the trolley for inventory 1 of the present invention, the indicator light 66 for indicating that the power supply unit 6 is charging the battery 3 or supplying power.
have.

In the trolley for inventory 1 of the present invention, the power supply unit 6 is AC.
It has a structure capable of inputting electric power.

[0073]

As described above, according to the trolley for inventory of the present invention, the bar code reader and the wireless L are mounted on the trolley frame.
If you put a PC with an AN card on it, you can move the trolley frame with the PC on by hand, and just plug the cord plug of the PC into the outlet for the PC. Inverter is D
Since the C voltage is converted to AC voltage, the battery of the power supply can be used as the power supply of the personal computer, and even if the battery of the power supply becomes weak, the battery can be charged by the charger. It is not necessary to take the power source of the personal computer from the outlet installed in the store when carrying out the inventory work of the product, and the inventory work of the product by the personal computer in a wide store can be quickly performed.

According to the trolley for inventory of the present invention, since the power supply unit is arranged at the lowest stage or the middle stage of the trolley frame, the power supply unit does not interfere with the inventory work by the personal computer of the product.

According to the stock truck of the present invention, since the power supply unit comprises the power supply box for accommodating the battery, the charger and the inverter, the battery, the charger and the inverter can be attached to the carriage frame together with the power supply box.

According to the trolley for inventory of the present invention, the outlet for the personal computer is arranged on the upper shelf of the trolley frame, so that the plug of the cord of the personal computer placed on the upper shelf can be inserted into the outlet for the personal computer. You can

According to the inventory cart of the present invention, it is possible to supply power from the power supply unit to the personal computer outlet on the upper shelf of the cart frame.

According to the inventory truck of the present invention, the personal computer fall prevention member can be mounted on the upper shelf of the truck frame.

According to the inventory cart of the present invention, the mouse pad is arranged on the upper shelf of the cart frame, so that the mouse of the personal computer placed on the upper shelf can be operated on the mouse pad.

According to the trolley for inventory of the present invention, since the personal computer fall prevention edge is provided on the upper shelf of the trolley frame, it is possible to reliably prevent the personal computer from falling from the upper shelf by the personal computer fall prevention edge. it can.

According to the stock truck of the present invention, since the antibacterial agent for preventing the generation of bacteria is applied to the cart frame and the upper shelf, the cart frame and the upper shelf can be kept clean.

According to the trolley for inventory of the present invention, since the trolley frame and the upper shelf are provided with the static electricity removing mechanism, the static electricity on the truck frame and the upper shelf can be removed by the static electricity removing mechanism.

According to the trolley for inventory of the present invention, the height of the upper rack and the intermediate rack with respect to the trolley frame can be freely set.

According to the inventory cart of the present invention, since the upper shelf of the cart frame is provided with the handle, the cart frame can be smoothly moved in a stable state while grasping the handle of the upper shelf by hand.

According to the trolley for inventory of the present invention, the impact when the trolley frame is moved can be absorbed by the impact absorbing mechanism.

According to the trolley for inventory of the present invention, since the power supply unit has a structure which surrounds and shields the battery, the charger and the inverter, the battery, the charger and the inverter are exposed to the outside of the power supply unit. And the appearance of the power supply can be improved.

According to the trolley for inventory of the present invention, the rack for mouse operation is arranged in the trolley frame so that it can be freely moved in and out. Therefore, the mouse for the mouse is simply pulled out from the trolley frame, and the mouse of the personal computer is moved to the rack for mouse operation. It can be operated above, and if the mouse operation shelf is pushed into the dolly frame, the mouse operation shelf can be stored in the dolly frame.

According to the trolley for inventory of the present invention, the upper ledge and the intermediate ledge of the trolley frame can be expanded.

According to the trolley for inventory of the present invention, the heat generated from the battery, the charger and the inverter inside the power source can be radiated to the outside.

According to the trolley for inventory of the present invention, since the power supply unit has the indicator light for indicating whether the battery is being charged or the power is being supplied, the indicator lamp can indicate whether the battery is being charged or the power is being supplied. it can.

According to the inventory cart of the present invention, AC power can be input to the power supply section.

[Brief description of drawings]

FIG. 1 is a front view showing an inventory cart according to a first embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is a plan view of essential parts showing a mounting state of the power supply unit of the stock truck according to the first embodiment of the present invention with respect to the truck frame.

FIG. 6 is an electric circuit diagram of a power supply unit of the inventory cart according to the first embodiment of the present invention.

FIG. 7 is a configuration diagram showing an inventory management service management system for products using the inventory cart of the present invention.

FIG. 8 is a front view showing an inventory cart according to a second embodiment of the present invention.

9 is a right side view of FIG. 8.

FIG. 10 is a plan view of FIG.

[Explanation of symbols]

1 Inventory Cart 2 Cart Frame 3 Battery 4 Charger 5 Inverter 6 Power Supply 7 Personal Computer Outlet 8 Upper Shelf 9 Middle Shelf 10 Mouse Operation Shelf 11 Handles 20a, 20b, 20c, 20d Vertical Members 21a, 21b, 21c, 21d Horizontal members 22a, 22b, 22c, 22d Casters 60 Power supply box 61 Bottom plate 62 Front plate 62a Vent hole 63 Side plate 64 AC power input cord 64a Insert plug 65 AC power output outlet 66 Indicator light 67 Cord winding hook 68a , 68b Fixing bolt 70 AC power input cord 73, 74 Fuse 75 Relay 76, 77 Relay contact 78 Diode 80 Horizontal plates 81a, 81b, 81c, 81d Personal computer fall prevention edge 83 Handle 100 Product inventory management system 101 Store 102 management center 03 network 104a, 104b shipment center 105 network 106 shelf 107 wireless LAN 108 computer 109 computer 110 database 111 computer 112 computer 113 database 114 bar code reader 115 wireless LAN card 116 PC 120 clerk

Continued front page    (72) Inventor Hiroshi Kikuchi             2 504 Shinanomachi, Totsuka-ku, Yokohama-shi, Kanagawa             Within Hitachi Electronic Services Co., Ltd. (72) Inventor Masamichi Takasaki             2 504 Shinanomachi, Totsuka-ku, Yokohama-shi, Kanagawa             Within Hitachi Electronic Services Co., Ltd. (72) Inventor Reiwa Yamagishi             2 504 Shinanomachi, Totsuka-ku, Yokohama-shi, Kanagawa             Within Hitachi Electronic Services Co., Ltd. (72) Inventor Takaaki Habara             2 504 Shinanomachi, Totsuka-ku, Yokohama-shi, Kanagawa             Within Hitachi Electronic Services Co., Ltd. (72) Inventor Mina Imai             2 504 Shinanomachi, Totsuka-ku, Yokohama-shi, Kanagawa             Within Hitachi Electronic Services Co., Ltd. F term (reference) 3D050 AA11 BB05 EE08 EE15                 3F022 AA09 FF01 LL02 MM08 MM22                       MM28 MM59 PP04

Claims (19)

[Claims] 1. A trolley for stocktaking which carries a personal computer equipped with a bar code reader and a wireless LAN card and is moved by hand, a power source section having a trolley frame with a battery, a charger and an inverter, and a personal computer outlet. A trolley for inventory, which is characterized by being provided with. 2. The trolley for inventory according to claim 1, wherein the power supply unit is arranged at the lowest stage or the middle stage of the trolley frame. 3. The trolley for inventory according to claim 1 or 2, wherein the power supply unit comprises a power supply box accommodating a battery, a charger and an inverter. 4. The trolley for inventory according to claim 1, wherein the outlet for a personal computer is arranged on an upper shelf of the trolley frame. 5. The trolley for inventory according to claim 1, wherein the power supply unit has a function of supplying electric power to an outlet for a personal computer arranged on an upper shelf of the trolley frame. 6. The trolley for inventory according to claim 4, wherein the upper shelf of the trolley frame has a structure in which a member for preventing personal computers from falling can be mounted. 7. The trolley for inventory according to claim 4, wherein a mouse pad is arranged on the upper shelf of the trolley frame. 8. The trolley for inventory according to claim 4, wherein a rim for preventing personal computers from falling is provided on an upper shelf of the trolley frame. 9. The trolley for inventory according to claim 1, wherein a bactericidal agent for preventing the generation of bacteria is applied to the trolley frame and the upper shelf. 10. The trolley for inventory according to claim 1, wherein the trolley frame and the upper shelf are provided with a static electricity removing mechanism for eliminating static electricity. 11. The inventory according to claim 1, wherein the truck frame has an upper shelf and an intermediate shelf, and the height of the upper shelf and the intermediate shelf with respect to the truck frame can be freely set. Dolly. 12. The trolley for inventory according to claim 1, wherein the upper shelf of the trolley frame is provided with a handle. 13. The truck for inventory according to claim 1, wherein the truck frame is provided with a shock absorbing mechanism for absorbing a shock during movement. 14. The trolley for inventory according to claim 1, wherein the power supply unit has a structure surrounding and shielding the battery, the charger and the inverter. 15. The trolley for inventory according to claim 1, wherein a rack for operating a mouse is arranged in a trolley frame so as to be freely inserted and removed. 16. The trolley for inventory according to claim 1, wherein the upper shelf and the intermediate shelf of the trolley frame have an expandable structure. 17. The trolley for inventory according to claim 14, wherein the power supply unit has a structure for radiating heat generated from the battery, the charger and the inverter to the outside. 18. The trolley for stocktaking according to claim 14, wherein the power supply unit has an indicator light for indicating that the battery is being charged or the power is being supplied. 19. The inventory truck according to claim 1, wherein the power supply unit has a structure capable of inputting AC power.