Delivery system

1. A delivery system comprising:

a delivery vehicle configured to be able to carry a delivery box to be delivered to a delivery destination; and

a carrier vehicle configured to be able to carry the delivery vehicle thereon, the carrier vehicle including a storage container configured to be able to store one or more delivery boxes,

the carrier vehicle including a conveyance control mechanism configured to perform conveyance control to convey the delivery box located at a predetermined storage location in the storage container to a storage location different from the predetermined storage location, the conveyance control mechanism performing the conveyance control to convey the delivery box to a receipt location at which the delivery vehicle can receive the delivery box, and

the delivery vehicle including a carrying control mechanism configured to perform carrying control to receive the delivery box from the carrier vehicle at the receipt location and to carry the received delivery box thereon,

wherein the delivery vehicle delivers to the delivery destination the delivery box carried on the delivery vehicle by the carrying control of the carrying control mechanism.

2. The delivery system according to claim 1 , wherein:

the storage container is constituted by a plurality of layers and configured to be able to store the delivery box in each of the layers, and

the carrying control mechanism includes:

a holding part configured to hold the delivery box carried on the delivery vehicle; and an interlayer transfer controller configured to perform transfer control, when a specified layer having the storage location at which the delivery box to be delivered to the delivery destination is stored is full, and when a delivery box different from the delivery box to be delivered to the delivery destination is located at the receipt location, the interlayer transfer controller performing the transfer control to hold the different delivery box located at the receipt location by the holding part to transfer the different delivery box to a layer different from the specified layer.

3. The delivery system according to claim 2 , wherein:

the holding part is configured to be able to move up and down with respect to the plurality of layers; and

the interlayer transfer controller performs the transfer control to move the holding part holding the different delivery box up and down to transfer the different delivery box to a layer different from the layer in which the delivery box received from the carrier vehicle is stored.

4. The delivery system according to claim 2 , wherein the conveyance control mechanism includes:

a first conveyor provided at least in the receipt location and configured to convey the delivery box in a front-to-back direction and a width direction of the carrier vehicle;

a second conveyor provided at least at a storage location different from the receipt location and configured to convey the delivery box in the front-to-back direction of the carrier vehicle; and

a conveyance controller configured to perform conveyance control to convey the delivery box by controlling at least one of the first conveyor and the second conveyor.

5. A delivery system comprising:

a delivery vehicle configured to carry a delivery box to be delivered to a delivery destination; and

a carrier vehicle configured to carry the delivery vehicle thereon, the carrier vehicle including:

an automated warehouse configured to store a plurality of delivery boxes and change locations of the plurality of delivery boxes; and

a controller configured to control the automated warehouse such that the delivery box to be delivered to the delivery destination is located at a receipt location at which the delivery vehicle can receive the delivery box by the time the delivery vehicle gets out of the carrier vehicle at a relay point on a delivery route from a shipping place to the delivery destination, and

the delivery vehicle carries the delivery box to be delivered to the delivery destination thereon upon receiving the delivery box located at the receipt location;

the delivery vehicle gets out of the carrier vehicle when the carrier vehicle arrives at the relay point for the delivery destination; and

the delivery vehicle travels on the delivery route from the relay point to the delivery destination to deliver the delivery box to the delivery destination.

6. The delivery system according to claim 5 , wherein:

the automated warehouse can store the plurality of delivery boxes to be delivered to a plurality of delivery destinations, respectively; and

the controller controls the automated warehouse such that the plurality of delivery boxes to be delivered to the plurality of delivery destinations are located in the receipt region in a delivering order according to the delivery destination.

7. The delivery system according to claim 6 , wherein the controller is configured to:

determine whether or not to change the delivery destination;

change the delivering order according to the changed delivery destination when determining to change the delivery destination; and

control the automated warehouse to locate each of the delivery boxes in the receipt location in the changed delivering order.

8. The delivery system according to claim 7 , wherein the controller determines whether or not to change the delivery destination, based on at least one of traffic information and road information on the delivery route.