An automatic storage and retrieval system is disclosed including storage positions for storing containers, a portal and mobile robots for transferring the containers between the storage positions and portal. The portal may include a bot-access side where the mobile robots transfer containers to and from the portal, and a user-access side where users remove items from the containers.

A cargo handling system may comprise a roller tray and a power drive unit located in the roller tray. The power drive unit may comprise a drive roller, a motor configured to drive a rotation the drive roller, and a load cell configured to detect a load applied to the drive roller.

A storage system is described where goods are stored in containers and the containers are stored in stacks. Above the stacks runs a grid network of tracks on which load handling devices run. The load handling devices take containers from the stacks and deposit then at alternative locations in the stacks or deposit then at stations where goods may be picked out. The framework may be provided with one or more of the following services: power, power control, heating, lighting, cooling, sensing, and data logging. A method of partitioning the storage system prevents the spread of fire or prevent damage caused by sprinkler activation.

This disclosure concerns an article and a method for using it. The article enables the user to conveniently stand, temporarily, on the rollers of a roller conveyor. The user sets the article on the roller conveyor, stands on the article, and when finished with his task, steps off the article and removes it from the roller conveyor. The article is made of a material which is light and strong, such as ultra-high molecular weight polyethylene. It features semi-circular recesses in a bottom surface which selectively and operatively receive the rollers of the roller conveyor. Packages can pass on the roller conveyor and the rollers can still turn in many cases, while the package passes next to the article.

A modular building system or storage system can include a number of stacks of container, each stack being positioned within a frame structure having uprights and a horizontal grid disposed above the stacks. The grid can include substantially perpendicular rails on which load handling devices can run. Containers having functions associated with a number of residential or commercial uses are moved in to and out of the stacks by the robotic handling devices running on the grid. The containers disposed in the stacks are selected by function on demand by a user, the building being reconfigurable to take into account required uses.

A system and method for handling shipping containers is described. The container handling system comprises a crane, the crane comprising crane load handling devices. The container handling system further comprises conveyance means, the conveyance means further comprising transversal load handling devices. The system further comprises storage and sortation means for storing the containers in a series of stacks disposed beneath a grid, the grid comprising a series of load handling devices operable thereon. The crane load handling device removes a container from a ship, transports it to transversal load handling means operable on a conveyor. The container is moved on the conveyor to a transfer point where it is collected by a robotic load handling device for transport to the storage and sortation area.

Disclosed autonomous mobile robot systems can be used to safely and efficiently navigate through a facility while avoiding objects in the path of the autonomous mobile robot during completion of a task. Specifically, a safety zone of a first size may be generated around an autonomous mobile robot based at least in part on first data from a first set of sensors associated with the autonomous mobile robot that are configured to identify an object within the safety zone. Information indicating a current speed of the autonomous mobile robot from associated propulsion components may be received and utilized to update the first size and a shape of the safety zone. Instructions to cease propulsion of the autonomous mobile robot may be transmitted to the propulsion components based on first data identifying the object within the updated first size of the safety zone.

A maintenance access system for a storage and retrieval system having a storage and retrieval space and automated transport vehicles disposed in the space. The system includes at least one maintenance access control unit associated with a portion of the space, at least one barrier in the space and defining a boundary of the portion of the space and configured to substantially prevent the passage of the vehicles past the at least one barrier, and a controller connected to the control unit, the controller being configured to receive a signal from the at least one control unit for isolating the portion of the space associated with the at least one control unit, where the controller in response to the signal closes the at least one barrier isolating the portion of the space and effects the removal from or shutting down of vehicles within the portion of the space.

A shoe sorter is described. The shoe sorter can include a switch plate that supports movement of a shoe pin of a pusher shoe, a finger, and an actuation arm. In some examples, the finger can be configured to be moved in a first direction in response to a portion of the shoe pin contacting a portion of the finger. The actuation arm can be pivotably engaged to the finger so that a movement of the finger in the first direction can cause a movement of the actuation arm in a second direction. In this regard, the actuation arm in the second direction can cause a change in a signal outputted by the photoelectric sensor coupled to the shoe sorter. This change in the signal can be used by a processor to determine that the shoe pin is misaligned.

A contact protection structure can be positioned on a belt body to prevent a pinching gap, where the belt body presents a conveyor belt deflected by a roller, and where a roller holder supporting the roller and attachable to the belt body also supports the contact protection structure.