JP7371526B2 - Shipping method - Google Patents

Description

The present invention relates to a technique for delivering packages.

2. Description of the Related Art Conventionally, delivery vehicles have been known that are used to deliver packages collected by a delivery company to a delivery destination. A truck for collection and delivery, which is an example of this type of delivery vehicle, is disclosed in Patent Document 1 listed below. This truck for collection and delivery includes a cabin with a driver's seat and a loading platform with a luggage compartment. By traveling this pickup/delivery truck, it is possible to transport and deliver the cargo loaded into the luggage compartment to the delivery destination.

Japanese Patent Application Publication No. 2009-126442

By the way, when an electric vehicle is used as a delivery vehicle, the battery of the electric vehicle is consumed during driving, so it is necessary to charge the battery after the delivery is completed. Therefore, the electric vehicle must wait until the battery is fully charged and the electric vehicle can travel next time, and the operating time of the electric vehicle can be kept short. As a result, this may become a factor that reduces the efficiency of package delivery.

The present invention has been made in view of this problem, and aims to provide a technique that is effective in increasing efficiency when delivering cargo using electric vehicles.

One aspect of the present invention is
An electric vehicle having a drive wheel, a first motor that drives the drive wheel, a first battery that serves as a power source for the first motor, a luggage compartment, and a second battery that can be charged at a distribution center. A delivery method for delivering packages using a plurality of trolleys having a
When one of the plurality of carts is a first cart and one of the plurality of carts is a second cart, which is different from the first cart, the second battery is already charged. While the first trolley, which has cargo loaded in the luggage compartment, is connected to the electric vehicle for delivery work, in parallel with this delivery work, the second trolley is operated at the delivery center to store the second battery. a first delivery step in which pre-delivery work is performed to charge the battery and load the cargo into the luggage compartment;
The second truck, on which the pre-delivery work has been completed, is replaced with the first truck and connected to the electric vehicle for which the delivery work has been completed in the first delivery step, and another delivery work is performed. In parallel with the work, a second delivery step of performing another pre-delivery work of charging the second battery at the delivery center in the replaced first trolley and loading cargo into the luggage compartment;
The shipping method is as follows.

According to each of the above aspects, in the delivery vehicle, when either the first trolley or the second trolley is connected to the electric vehicle by the coupling portion, the second battery of the truck is connected to the electric vehicle through the electrical connection portion. Connected to the car's first motor. Therefore, power can be supplied from the second battery on the truck to the first motor on the electric vehicle, and this second battery can be used as a power source for the first motor.

At this time, the electric vehicle pulls the trolley and travels, making it possible to deliver the cargo. In addition, in parallel with this delivery work, the second battery of either the first or second cart can be charged at the distribution center, and the cargo can be loaded into the luggage compartment to wait until the next delivery operation. can.

Thereafter, by replacing the trolley connected to the electric vehicle for which the delivery work has been completed with another trolley in a standby state, it is possible to quickly move on to the next delivery work. Therefore, by avoiding waiting for the second battery to be charged as much as possible, it is possible to reduce the waiting time of the electric vehicle and increase its available operating time, and it is possible to prevent a drop in cargo delivery efficiency.

As described above, according to each of the above aspects, it is possible to provide a technique that is effective in increasing efficiency when delivering cargo using an electric vehicle.

FIG. 3 is a side view showing how the electric vehicle pulls the first cart in the delivery vehicle of Embodiment 1. FIG. FIG. 2 is a side view showing the state of the first truck in FIG. 1 when it is electrically driven. System configuration diagram of each trolley. FIG. 2 is a perspective view showing how the delivery system according to the first embodiment performs a first delivery step; FIG. 3 is a perspective view showing the delivery system according to the first embodiment when a second delivery step is executed; 1 is a flowchart of the delivery method of Embodiment 1. FIG. 7 is a side view showing how the electric vehicle pulls two first carts in the delivery vehicle of Embodiment 2;

Preferred embodiments of each of the above aspects will be described.

In the above delivery vehicle, it is preferable that each of the plurality of carts has a second motor powered by the second battery, and self-propelled wheels driven only by the second motor.

According to this delivery vehicle, the cart can be electrically driven in a state where it is separated from the electric vehicle, and the cart can be used independently for delivering cargo. As a result, the physical burden on the worker can be reduced compared to the case where a handcart that cannot run on its own is used.

In the delivery vehicle, each of the plurality of carts includes a left drive wheel and a right drive wheel as the self-propelled wheels, a left drive wheel motor and a right drive wheel motor as the second motor, and the It is preferable to include a controller for controlling a left drive wheel motor and a right drive wheel motor.

According to this delivery vehicle, when the trolley is used independently for delivering cargo, the controller can control the left drive wheel motor and the right drive wheel motor to make the trolley move electrically while adjusting its direction. It becomes possible.

In the above delivery vehicle, it is preferable that the capacity of the second battery of each of the plurality of trolleys exceeds the capacity of the first battery of the electric vehicle.

According to this delivery vehicle, by increasing the capacity of the second battery on the trolley side compared to the capacity of the first battery on the electric vehicle side, the second battery can be used as the main battery for the electric vehicle, and the first battery can be used as the main battery for the electric vehicle. The battery can be used as a sub-battery for electric vehicles.

Preferably, the delivery system includes the delivery vehicle and a charging facility provided at the delivery center to charge the second battery of each of the plurality of trolleys.

According to this delivery system, it is possible to charge the second battery of each cart using the charging equipment at the delivery center, and to perform pre-delivery work in which cargo is loaded into the luggage compartment of the cart.

In the above delivery method, each of the plurality of carts has a second motor powered by the second battery, and self-propelled wheels driven only by the second motor,
In each of the first delivery step and the second delivery step, it is preferable that the first cart or the second cart be separated from the electric vehicle in the delivery area and run electrically to the delivery destination.

According to this delivery method, the trolley can be electrically driven to the delivery destination in a state where it is separated from the electric vehicle in the delivery area, and the trolley can be used independently for delivering cargo. As a result, the physical burden on the worker can be reduced compared to the case where a handcart that cannot run on its own is used.

Hereinafter, embodiments will be described in more detail with reference to the drawings.

In addition, in the drawings used in the description of this specification, unless otherwise specified, the traveling direction of the delivery vehicle is indicated by an arrow X.

(Embodiment 1)
As shown in FIG. 1, the delivery vehicle 1 of the first embodiment is for delivering cargo W outdoors. This delivery vehicle 1 includes an electric vehicle 10, a plurality of carts 20, a connecting portion 30, and an electrical connection portion 40. The luggage W is composed of one article or a collection of a plurality of articles. "Delivery" here can also be referred to as "transportation,""delivery," or "home delivery."

The electric vehicle 10 is a vehicle that can run using a motor, and includes drive wheels 11, a first motor 12 that drives the drive wheels 11, and a first battery 13 that serves as a power source for the first motor 12. . This electric vehicle 10 can be driven by operator A.

Each of the plurality of trolleys 20 is a vehicle that can run using a motor, and has a luggage compartment 21 for loading luggage W, a second battery 22 that can be charged at a distribution center 50, which will be described later, and a second battery 22. The second motor 23 is powered by the second motor 23, and the second motor 23 is driven only by the second motor 23.

Each trolley 20 is provided with a controller 25, an operation panel 26, and a handle 27. The controller 25 is configured as a control unit that performs general control of each truck 20. Operator A can perform input operations for controlling each trolley 20 on the operation panel 26. Operator A can hold the handle 27 when each trolley 20 runs electrically.

Note that the number of carts 20 is not particularly limited, and an appropriate number of two or more carts 20 can be used as necessary. In FIG. 1, a first cart 20A, which is one of the two carts 20, and a second cart 20B, which is another cart from the first cart 20A, are illustrated. ing.

The connecting portion 30 has a function of connecting each of the plurality of carts 20 to the electric vehicle 10 in a separable manner. As a result, any one of the plurality of carts 20 selected from among the plurality of carts 20 can be connected to the electric vehicle 10 using the connecting portion 30.

The connecting portion 30 includes an arm member 31 provided on the back surface of the electric vehicle 10 and an arm member 32 provided on the front surface of each truck 20. The arm member 31 and the arm member 32 are configured so that they can be connected and disconnected from each other. Therefore, in order to connect the electric vehicle 10 and each truck 20, the arm member 31 of the electric vehicle 10 and the arm member 32 of each truck 20 are connected to each other. On the other hand, in order to disconnect the electric vehicle 10 and each truck 20, the connection between the arm member 31 of the electric vehicle 10 and the arm member 32 of each truck 20 is released.

Furthermore, an arm member 33 that can be connected to and disconnected from an arm member 31 of the electric vehicle 10 is provided on the front surface of each truck 20. Therefore, in order to connect the two trucks 20, the arm member 33 of one truck 20 and the arm member 32 of the other truck 20 are connected to each other. On the other hand, in order to disconnect the two trucks 20, the arm member 33 of one truck 20 and the arm member 32 of the other truck 20 are disconnected.

The electrical connection unit 40 connects the second battery 22 of the first truck 20A and the second truck 20B to the first motor 12 of the electric vehicle 10 in a state where either the first truck 20A or the second truck 20B is connected to the electric vehicle 10 by the connecting portion 30. It has the function to connect to the power supply. That is, in a state where the first truck 20A is connected to the electric vehicle 10 by the connecting portion 30, the first truck 20A is connected to the first motor 12 of the electric vehicle 10 by the electrical connection portion 40 so as to be able to supply power. On the other hand, when the second truck 20B is connected to the electric vehicle 10 by the connecting portion 30, the second truck 20B is connected to the first motor 12 of the electric vehicle 10 by the electrical connection portion 40 so as to be able to supply power. .

The electrical connection section 40 is configured by a conductive member such as a connection cord or a connector in order to connect the second battery 22 and the first motor 12 to each other by wire. Alternatively, the second battery 22 can be connected to the first motor 12 of the electric vehicle 10 so as to be able to supply power using a known wireless power supply.

In the delivery vehicle 1 of this embodiment, the first battery 13 of the electric vehicle 10 and the second battery 22 of each trolley 20 are rechargeable batteries such as known lithium-ion batteries, nickel-metal hydride batteries, lead-acid batteries, etc. A secondary battery is used, and the capacity of each second battery 22 of the plurality of carts 20 is configured to exceed the capacity of the first battery 13 of the electric vehicle 10.

As shown in FIG. 1, when delivering the luggage W loaded into the luggage compartment 21 of the first trolley 20A, the first trolley 20A is connected to the electric vehicle 10 by the connecting part 30, and the electric vehicle 10 is connected to the first truck 20A. Travel to delivery area D while towing 20A. At this time, the second motor 23 of the first truck 20A is not used for traveling, and the self-propelled wheels 24 are not driven by the second motor 23. On the other hand, the second truck 20B is in a state separated from the electric vehicle 10.

As shown in FIG. 2, in each of the "first delivery step" and "second delivery step" described later, when the delivery vehicle 1 reaches the delivery area D, the first cart 20A is moved to the electric vehicle in the delivery area D. 10, the cargo W on the first trolley 20A can be electrically driven to the delivery destination E within the delivery area D. At this time, the worker A can make the electric vehicle 10 travel electrically to the delivery destination E by getting off the electric vehicle 10 and performing an input operation on the operation panel 26 while holding the handle 27 of the first trolley 20A. . Thereby, the packages W can be individually delivered to the destination E.

As shown in FIG. 3, each truck 20 includes a left drive wheel 24L and a right drive wheel 24R as self-propelled wheels 24, and a left drive wheel motor 23L and a right drive wheel motor 23R as the second motor 23. and has. The left drive wheel motor 23L and the right drive wheel motor 23R are controlled by the controller 25. Further, the controller 25 outputs control signals to the left drive wheel motor 23L and the right drive wheel motor 23R, and receives speed information from the left drive wheel motor 23L and the right drive wheel motor 23R. Voltage information from the second battery 22 is output to the controller 25.

In each truck 20, the second battery 22 is capable of supplying power to the left drive wheel motor 23L and right drive wheel motor 23R, and can also be charged from the left drive wheel motor 23L and right drive wheel motor 23R. It is configured so that it is possible. For this reason, for example, as shown in FIG. 1, when the electric vehicle 10 tows the first bogie 20A, the left drive wheel motor 23L and the right drive wheel motor 23R are connected to the second battery 22 of the first bogie 20A. It will be charged. On the other hand, as shown in FIG. 2, when the first bogie 20A runs alone on electric power, power is supplied from the second battery 22 of the first bogie 20A to the left drive wheel motor 23L and the right drive wheel motor 23R. be done.

As shown in FIG. 4, the delivery system 2 according to the first embodiment collects and collects cargo W in order to charge the second battery 22 of each of the delivery vehicle 1 and the plurality of carts 20 of the delivery vehicle 1. and a charging facility 51 provided at a distribution center 50 that performs.

As the charging equipment 51, typically, a wired charging stand in which a cable is provided with a charging connector can be used. In this case, by wire-connecting the charging connector of the cable to the charging port provided on each trolley 20, it becomes possible to charge the second battery 22.

Note that instead of the wired charging stand, it is also possible to use a wireless charging stand. In this case, it is possible to charge the second battery 22 by bringing the power receiving coil mounted on each trolley 20 close to the power transmitting coil installed on the road surface and electrically connected to the power transmission stand via a cable. become.

Here, the delivery method of Embodiment 1 will be explained mainly with reference to FIGS. 4 to 6. In this delivery method, an electric vehicle 10 and a plurality of trolleys 20 of a planned number are prepared, and the package W is delivered to the delivery destination E by using the delivery vehicle 1 consisting of the electric vehicle 10 and the plurality of trolleys 20. This is the way to do it.

The delivery method of the first embodiment is a method of delivering the package W, and is executed by sequentially executing a plurality of steps from step S101 to step S112 in FIG. Note that, if necessary, another step may be added to the plurality of steps in FIG. 6, or each step in FIG. 6 may be divided into a plurality of steps.

Step S101 in FIG. 6 is a step for preparing the electric vehicle 10 and a plurality of carts 20, as shown in FIG. According to this step S101, the electric vehicle 10 and a plurality of carts 20 that constitute the delivery vehicle 1 are prepared in advance at the delivery center 50 that is the delivery source.

In FIG. 6, steps from step S102 to step S106 are "first delivery steps" in which the cargo W is delivered using the first trolley 20A. Furthermore, the steps from step S107 to step S111 that are executed subsequent to the first delivery step are "second delivery steps" in which the cargo W is delivered using the second trolley 20B.

Step S102 in FIG. 6 is a step of connecting the first cart 20A in a standby state among the plurality of carts 20 to the electric vehicle 10, as shown in FIG. The "standby state" here means that the second battery 22 (see FIG. 1) in the first trolley 20A is already charged by the charging equipment 51 of the distribution center 50, and there is no cargo in the luggage compartment 21 of the first trolley 20A. This refers to a state in which W has already been loaded, that is, a state in which pre-delivery work has been completed. According to this step S102, the first cart 20A, on which the pre-delivery work has been completed, is connected to the electric vehicle 10 by the connecting portion 30 (see FIG. 1).

Step S103 in FIG. 6 is a step in which the first cart 20A is towed to the delivery area D by the electric vehicle 10, as shown in FIG. According to this step S103, the package W can be transported in the delivery area D to the vicinity of the delivery destination E.

Step S104 in FIG. 6 is a step in which pre-delivery work is performed on the second trolley 20B in parallel with the delivery work by the electric vehicle 10 and the first trolley 20A. This step S104 is preferably executed at an appropriate timing between step S103 and step S106. According to this step S104, as shown in FIG. 4, in the second truck 20B, the second battery 22 (see FIG. 1) is charged by the charging equipment 51 of the distribution center 50, and at the same time, the second battery 22 (see FIG. 1) is charged in the second truck 20B. Pre-delivery work is performed to load the cargo W onto the container 21.

Step S105 in FIG. 6 is a step in which the first cart 20A is separated from the electric vehicle 10 and driven to the delivery destination E, following step S103. According to this step S105, as shown in FIG. 2, the worker A moves the cargo W loaded in the luggage compartment 21 of the first trolley 20A to the delivery destination E by driving the first trolley 20A electrically. Can be delivered.

Step S106 in FIG. 6 is a step subsequent to step S105 in which the electric vehicle 10 tows the first cart 20A to the distribution center 50 after the delivery is completed. According to this step S106, the first cart 20A can be returned to the distribution center 50 with the luggage compartment 21 empty or with some of the luggage W remaining in the luggage compartment 21.

Step S107 in FIG. 6 is a step subsequent to step S106 in which a second truck 20B is connected to the electric vehicle 10 in place of the first truck 20A. According to this step S107, the second cart 20B, on which the pre-delivery work has been completed, is connected to the electric vehicle 10.

Step S108 in FIG. 6 is a step in which the second cart 20B is towed to the delivery area D by the electric vehicle 10, as shown in FIG. According to this step S108, the package W can be transported in the delivery area D to the vicinity of the delivery destination E. At this time, the delivery area D and the delivery destination E may be the same as in the first delivery step, or may be different from those in the first delivery step.

In step S109 in FIG. 6, pre-delivery work of the first trolley 20A is performed in parallel with the delivery work by the electric vehicle 10 and the second trolley 20B (delivery work different from the delivery work by the electric vehicle 10 and the first trolley 20A). (Pre-delivery work different from the pre-delivery work of the second trolley 20B) is performed. According to this step S109, as shown in FIG. 5, in the first truck 20A, the second battery 22 (see FIG. 1) is charged by the charging equipment 51 of the distribution center 50, and the luggage W is loaded into the luggage compartment 21. Pre-delivery work is carried out. This step S109 is preferably executed at an appropriate timing between step S108 and step S111.

Step S110 in FIG. 6 is a step in which the second cart 20B is separated from the electric vehicle 10 and driven to the delivery destination E, following step S108. According to this step S110, the worker A can deliver the cargo W loaded in the luggage compartment 21 of the second trolley 20B to the destination E by driving the second trolley 20B electrically.

Step S111 in FIG. 6 is a step subsequent to step S110 in which the electric vehicle 10 tows the second cart 20B to the distribution center 50 after the delivery is completed. According to this step S111, the second cart 20B can be returned to the distribution center 50 with the luggage compartment 21 empty or with some of the luggage W remaining in the luggage compartment 21.

Step S112 in FIG. 6 is a step for determining whether or not to end the delivery work. According to this step S112, if the delivery work is to be continued (in the case of "No" in step 112), the process returns to step S103, and if the delivery work is to be completed (in the case of "Yes" in step 112), the process is directly terminated. do.

Next, the effects of the first embodiment described above will be explained.

According to the first embodiment described above, in the delivery vehicle 1, when either the first cart 20A or the second cart 20B is connected to the electric vehicle 10 by the connecting portion 30, the second battery 22 of the cart is connected to the electric vehicle 10. It is connected to the first motor 12 of the electric vehicle 10 via the electrical connection part 40 . Therefore, power can be supplied from the second battery 22 on the truck 20 side to the first motor 12 on the electric vehicle 10 side, and this second battery 22 can be used as a power source for the first motor 12.

At this time, the electric vehicle 10 travels while towing the trolley 20, thereby making it possible to perform the work of delivering the cargo W. In addition, in parallel with this delivery work, the second battery 22 of either the first trolley 20A or the second trolley 20B is charged at the distribution center 50, and the luggage W is loaded into the luggage compartment 21 for the next delivery. You can wait until the work is done.

Thereafter, by replacing the trolley 20 connected to the electric vehicle 10 for which the delivery work has been completed with another trolley 20 in a standby state, it is possible to quickly move on to the next delivery work. Therefore, by avoiding waiting to charge the second battery 22 as much as possible, it is possible to reduce the waiting time of the electric vehicle 10 and increase its available operating time, and it is possible to prevent the delivery efficiency of the cargo W from decreasing. become.

Therefore, according to the first embodiment described above, it is possible to provide an effective technique for increasing efficiency when delivering cargo W using the electric vehicle 10.

According to the above-described first embodiment, the trolley 20 can be electrically driven while being separated from the electric vehicle 10, and the trolley 20 can be used independently for delivering the cargo W.

According to the first embodiment described above, when the trolley 20 is used independently for delivering cargo W, the direction of the trolley 20 is controlled by the controller 25 controlling the left drive wheel motor 23L and the right drive wheel motor 23R. This makes it possible to drive electrically while making adjustments.

According to the first embodiment described above, by increasing the capacity of the second battery 22 on the trolley 20 side compared to the capacity of the first battery 13 on the electric vehicle 10 side, the second battery 22 is used as the main battery for the electric vehicle 10. In addition, the first battery 13 can be used as a sub-battery for the electric vehicle 10.

According to the first embodiment described above, in the delivery system 2, the second battery 22 of each trolley 20 is charged by the charging equipment 51 of the delivery center 50, and the cargo W is loaded into the luggage compartment 21 of the trolley 20 before delivery. Work can be done in advance.

Other embodiments related to the first embodiment will be described below with reference to the drawings. In other embodiments, the same elements as those in Embodiment 1 are given the same reference numerals, and descriptions of the same elements will be omitted.

(Embodiment 2)
As shown in FIG. 7, in the delivery vehicle 101 of the second embodiment, a first trolley 20A is connected to the electric vehicle 10 via the coupling part 30 when delivering the cargo W, and the first trolley 20A is further provided with two arms. Another first truck 20A is connected via members 32 and 33.

The second battery 22 on the front side of one first bogie 20A is electrically connected to the second battery 22 on the rear side of the other first bogie 20A via an electrical connection section 41 made of the same elements as the electrical connection section 40. Connected. Therefore, the second battery 22 on the front side is electrically connected to the first motor 12 on the electric vehicle 10 side via the electrical connection part 40, and the second battery 22 on the rear side is electrically connected to the first motor 12 on the electric vehicle 10 side via the electrical connection part 41. It is electrically connected to the second battery 22 on the front side. In this case, the second battery 22 on the rear side is electrically connected to the first motor 12 on the electric vehicle 10 side via the two electrical connections 40 and 41.

The other configurations are the same as in the first embodiment.

According to the second embodiment described above, it becomes possible to transport the luggage W loaded into the luggage compartment 21 of the first trolley 20A and the luggage W loaded into the luggage compartment 21 of the second trolley 20B to the delivery area D at the same time. . Therefore, it is possible to improve the efficiency of sorting the luggage W.

Furthermore, according to the second embodiment described above, since it is possible to supply power to the first motor 12 from the two second batteries 22, the distance that the electric vehicle 10 can travel is longer than that of the delivery vehicle 1 of the first embodiment. It is effective in increasing

Other than that, the same effects as in the first embodiment are achieved.

In addition, in a modification particularly related to the second embodiment described above, three or more first carts 20A or second carts 20B can be connected in series to the electric vehicle 10.

The present invention is not limited to the typical embodiments described above, and various applications and modifications are possible without departing from the purpose of the present invention. For example, the following embodiments that apply the above-described embodiments can also be implemented.

In the above-described embodiment, the case where each truck 20 is a self-propelled truck is illustrated, but instead, a non-self-propelled truck in which the second motor 23 is omitted may be used. Such a cart is used as a push cart that is manually operated by an operator.

In the above-described embodiment, the case where each truck 20 has two drive wheels 24L and 24R is illustrated, but the number of drive wheels of each truck 20 is not limited to this, and the number of drive wheels may be one or more as necessary. Three or more drive wheels may be provided.

In the above-described embodiment, the case where the capacity of the second battery 22 of each truck 20 exceeds the capacity of the first battery 13 of the electric vehicle 10 is exemplified, but if necessary, the capacity of the second battery 22 may be The capacity may be the same as the capacity of the battery 13 or may be less than the capacity of the first battery 13.

In the embodiment described above, the electric vehicle 10 is a manned vehicle, but an unmanned electric vehicle may be used instead. Further, the electric vehicle 10 only needs to be able to run electrically, and if necessary, it can be equipped with an engine that assists electric driving in addition to a motor for electric driving.

In the above-described embodiment, the technique for delivering the package W outdoors is exemplified, but this technique can also be applied to the technique for delivering the package W indoors.

W Luggage 1,101 Delivery vehicle 2 Delivery system 10 Electric vehicle 11 Drive wheel 12 First motor 13 First battery 20 Trolley 20A First trolley (truck)
20B 2nd trolley (bogie)
21 Luggage space 22 2nd battery 23 2nd motor 23L Left drive wheel motor 23R Right drive wheel motor 24 Self-propelled wheel 24L Left drive wheel (self-propelled wheel)
24R right drive wheel (self-propelled wheel)
25 Controller 30 Connection part 40 Electrical connection part 50 Distribution center 51 Charging equipment D Delivery area E Delivery destination S102-S106 First delivery step S107-S111 Second delivery step

Claims (2)

An electric vehicle having a drive wheel, a first motor that drives the drive wheel, a first battery that serves as a power source for the first motor, a luggage compartment, and a second battery that can be charged at a distribution center. A delivery method for delivering packages using a plurality of trolleys having a
When one of the plurality of carts is a first cart and one of the plurality of carts is a second cart, which is different from the first cart, the second battery is already charged. While the first trolley, which has cargo loaded in the luggage compartment, is connected to the electric vehicle for delivery work, in parallel with this delivery work, the second trolley is operated at the delivery center to store the second battery. a first delivery step in which pre-delivery work is performed to charge the battery and load the cargo into the luggage compartment;
The second truck, on which the pre-delivery work has been completed, is replaced with the first truck and connected to the electric vehicle for which the delivery work has been completed in the first delivery step, and another delivery work is performed. In parallel with the work, a second delivery step of performing another pre-delivery work of charging the second battery at the delivery center in the replaced first trolley and loading cargo into the luggage compartment;
shipping method. Each of the plurality of carts has a second motor powered by the second battery, and self-propelled wheels driven only by the second motor,
The delivery according to claim 1, wherein in each of the first delivery step and the second delivery step, the first cart or the second cart is separated from the electric vehicle in the delivery area and is electrically driven to the delivery destination . Method.

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