A mold transfer assembly comprises a carriage assembly configured to be placed adjacent a concrete products forming machine. The carriage assembly has a track running along a mold-transfer path to the mold-receiving path. Each of at the mold cassette assemblies running within the track are configured to retain a mold assembly, wherein the mold cassette assemblies are configured to move along the track between a retracted position spaced from the mold-receiving path adjacent to the concrete products forming machine, and position(s) intersecting the mold-receiving path including an incoming mold cassette position, and an outgoing mold cassette position.

A nursery assembly for use in a nursery includes a cultivation floor, a gantry construction, a tool, a manipulator, and a rail system arranged along the cultivation floor. The gantry construction includes: a gantry beam, a first and a second gantry upright, which support the gantry beam at a distance above the cultivation floor. The manipulator is configured to be able to displace the tool along the gantry beam and/or to be able to rotate said tool with respect to the gantry beam. The gantry beam extends transverse to the rail system. The gantry uprights are each provided, at the bottom ends thereof, with a gantry drive. The gantry drives are configured to be able to displace the gantry construction in a longitudinal direction of the rail system.

A nursery assembly for use in a nursery includes a cultivation floor, a gantry construction, a tool, a manipulator, and a rail system arranged along the cultivation floor. The gantry construction includes: a gantry beam, a first and a second gantry upright, which support the gantry beam at a distance above the cultivation floor. The manipulator is configured to be able to displace the tool along the gantry beam and/or to be able to rotate said tool with respect to the gantry beam. The gantry beam extends transverse to the rail system. The gantry uprights are each provided, at the bottom ends thereof, with a gantry drive. The gantry drives are configured to be able to displace the gantry construction in a longitudinal direction of the rail system.

A robotic service device is described for use on a robotic picking system grid. The robotic service device is capable of driving to any location on the grid order to perform maintenance operations or cleaning. Additionally, the service device may be used to rescue robotic load handling devices operational in the picking system. The robotic service device may include a releasable docking mechanism to enable it to dock and latch on to malfunctioning load handling devices. The service device may also be provided with cleaning capability and a camera to enable the condition of the grid and other robotic devices to be monitored.

A robotic service device is described for use on a robotic picking system grid. The robotic service device is capable of driving to any location on the grid order to perform maintenance operations or cleaning. Additionally, the service device may be used to rescue robotic load handling devices operational in the picking system. The robotic service device may include a releasable docking mechanism to enable it to dock and latch on to malfunctioning load handling devices. The service device may also be provided with cleaning capability and a camera to enable the condition of the grid and other robotic devices to be monitored.