Abstract: A transport system includes a first track that passes above loading ports of the processing devices, and an overhead travelling vehicle that travels along the first track and includes a hoist. A second track is below the first track, passes above the loading ports, and is disposed in parallel or substantially in parallel with the first track. A buffer is provided below the second track at a position higher than the loading ports, and is arranged such that the articles can pass in a vertical direction over the loading ports. The buffer is disposed such that the articles can pass through the height position of the buffer in a vertical direction over the loading ports. A local vehicle travels along the second track and includes a hoist to perform delivery and receipt of the articles between the buffer and the loading ports.

Abstract: An autonomous transport vehicle for transferring case units to and from predefined storage areas in an automated case unit storage system, the automated case unit storage system including an array of multilevel storage racks with picking aisles passing therebetween and at least one multilevel vertical conveyor having movable shelves, the autonomous transport vehicle including a frame configured to traverse the picking aisles and a transfer deck connecting the picking aisles to the at least one multilevel vertical conveyor for transferring case units between the predefined storage areas and the at least one multilevel vertical conveyor, and a controller connected to the frame, the controller being configured to effect movement of the autonomous transport vehicle through the picking aisles for accessing each storage area within a respective level of the array of multilevel storage racks and each shelf of the at least one multilevel vertical conveyor.

Abstract: There is provided a vertical lift storage system (101), comprising a storage rack (105) configured to store load units and a lift system with an upwardly and downwardly movable carrier structure (108), where the carrier structure (108) is configured to carry multiple load units at respective sections and with first transportation means configured to insert and withdraw respective load units into and from the storage rack. The system is characterized in that the carrier structure is configured with second transportation means to shift load units sideways on the carrier structure between its sections. In some embodiments the first transportation means comprises telescopic arms and the second transportation means comprises rollers.

Abstract: The invention relates to a method for automatically order-picking or consolidating articles of a wide variety of different formats and varieties, using the following steps: separating the stored articles, storing the articles in a rack bay, retrieving the articles and palletizing them. The method is predominantly characterized in that the articles which are to be order-picked for an order are put together in a rack bay already in the sequence which is necessary for palletizing. The invention also relates to an installation for implementing the method.

Abstract: A conveyance vehicle system that achieves an increased efficiency of loading an article from a conveyance vehicle into a loading opening of an automated warehouse, includes a stocker, a conveyance vehicle, and a conveyance vehicle controller. The stocker includes racks, a loading port, and a stocker controller. The conveyance vehicle loads an article into the loading port of the stocker. The conveyance vehicle controller assigns the conveyance vehicle with an article conveyance command to convey the article to the stocker. The stocker controller receives a predicted conveyance command before the article is loaded from the conveyance vehicle into the stocker. The predicted conveyance command includes ID information of the article and information indicating whether or not the article is to be loaded into a rack.

Abstract: An example system may include the following features: slots configured to receive devices to be tested; a device transport mechanism to move devices between a shuttle mechanism and slots; a feeder to provide devices untested devices and to receive tested devices; and a shuttle mechanism to receive an untested device from the feeder and to provide the untested device to the device transport mechanism, and to receive a tested device from the device transport mechanism and to provide the tested device to the feeder.

Abstract: A system for selectively disallowing unwinding of a storage library robotic mechanism cable assembly in a direction that would otherwise allow a platform of the robotic mechanism to move downwardly via the force of gravity while at the same time allowing for winding up of the cable assembly and the platform, such as during shipping, manual access, replacement of the robotic mechanism, and/or the like. The system may include a ratchet pawl for engaging between adjacent teeth of a drive assembly of the robotic mechanism and an actuator for selectively moving or allowing for movement of the ratchet pawl into and out of the engaged position. In one embodiment, the system may include an electric switch or the like to sense when the pawl is engaged with the drive assembly.

Abstract: A storage and distribution device and method based on an arrangement whereby the largest sides of boxed products are in contact with one another are disclosed. The device includes a storage device, a blind door and a restocking manipulator. The blind door is disposed at the front of the storage device, and the restocking manipulator is disposed at the rear of the storage device. The storage device includes a plurality of storage units. Each of the storage units includes a matrix storage rack provided with a plurality of storage passages in a matrix arrangement. Each of the storage passages includes two baffle plates having brushes and a bottom plate. A discharge control device is disposed at the front of a discharge end of each storage passage. A spiral spring driver is further disposed on each storage passage. The driver is driven by a spiral spring energy-storage device to move stored items towards the discharge end of the passage.

Abstract: A system for loading workpieces into a process chamber for processing in a matrix configuration includes a conveyor configured to transport multiple workpieces in a linear fashion. A workpiece hotel is configured to receive the multiple workpieces from the conveyor. The workpiece hotel comprises a matrix of cells arranged in N columns and M floors. A pick blade is configured to insert into the hotel and retract from the hotel in order to unload a plurality of substrates from a first floor into a single row of the pick blade, and to repeat the unloading operation to form a matrix comprising a plurality of rows of substrates disposed on the pick blade. In one example, the workpiece hotel has a staggered configuration that provides individual accessibility of each hotel cell.

Abstract: A storage structure (10) according to the invention comprises a plurality of pallets (14) that is each configured to carry a load such as a car (16), a vertical conveyor (12) including a number of endless chains (26), a support structure (24) that defines storage bays (18) in which the pallets (14) and cars (16) can be stored, a number of brackets (30) on each chain (26), and a sliding mechanism (44,46) on each level, for sliding the pallets (14) between the bays (18) and a position in which the pallet (14) is supported on some of the brackets (30) on the chains (26). The bays (18) are provided on opposing sides of the vertical conveyor (12) and are spaced apart vertically on multiple levels, with equal vertical spacing between the levels.

Abstract: An automated warehouse includes first and second stacked racks parallel to each other; first and second shipping-and-receiving stations placed at the same end of the stacked racks; transfer shuttles located between the stacked racks and between the shipping-and-receiving stations; elevator mechanisms equipped with first and second elevator platforms for receiving or transferring the packages to stand-by conveyors; and means for transferring the packages to and from the first and the second elevator platforms. The direction of motion of the stand-by conveyor of the first shipping-and-receiving station and the direction of the motion of the stand-by conveyor of the second shipping-and-receiving station, on the same level of stack, may be opposite; and the direction of motion of some of the stand-by conveyors pertaining to the first shipping-and-receiving station may be opposite to that of the rest of the stand-by conveyors of the first shipping-and-receiving station.

Abstract: A chassis stacker having a first and a second vertical storage rack displaced from one another by a distance wide enough to accommodate a trailer chassis, and connected at a top end by a trolley rail support beam. A trolley is positioned on the trolley rail support beam, said trolley having an elevation system capable of raising and lowering a first and a second stabilizing beam that are suspended from the trolley and guided in their vertical motion by low-friction, storage-rack contact members attached at respective first and second ends of the elevating structure, said contact members in contact with an inner surface of the respective first and second vertical storage racks. A first and a second stabilizing-beam trolley is attached to the, respective, first and second stabilizing beams while a spreader containing a chassis-clamping mechanism extends between and attaches to the first and the second stabilizing beam trolley.

Abstract: Method for providing transport units from a storage facility on at least one removal line, wherein the transport units are stored in a plurality of storage racks and storage rack levels, wherein interior storage racks are arranged in pairs adjoining one another and have a storage aisle on each side of the pair. At least one storage line and at least one removal line is provided. The transport units are placed into storage in, and removed from storage from, the storage rack via a storage and removal apparatus for each access aisle. For each access aisle, a storage and removal apparatus is provided. At least one removal lift is used to transfer the transport units to the removal line connected downstream thereof. A direct exchange of transport units takes place between two adjoining storage racks from one access aisle to an adjacent access aisle via transverse conveyance locations in the storage racks. The storage and removal apparatus moves the transport units in the transverse conveyance locations.

Abstract: Methods and apparatus for selecting and combining items in an outbound container through the use of autonomous vehicles, each of which includes means for automatically loading and unloading a payload, to perform both transfer and transport functions in moving containers of items within a workspace via a network of roadways. Under computer control, said autonomous vehicles transfer and transport case containers of item units between incoming receiving stations, intermediate storage locations, and outgoing order-assembly stations where entire containers or individual item units are combined in the outbound container.

Abstract: A lift mechanism is provided. The lift mechanism includes a frame having a base, a spine extending from the base and a table, adjustment units configured to permit table adjustments, an attachment mechanism by which the table is attachable to a rack frame and a driving unit configured to drive a load relative to the rack frame.

Abstract: A modular system for storage of cargo units in a designated space. The modular system includes: a plurality of interconnected active cell units, each cell unit including a cell transporting mechanism with at least one active shuttle unit moveable between the plurality of cell units. Each shuttle unit includes a shuttle transporting mechanism adapted to transport at least one pallet of the plurality of pallets to and from one of the plurality of cell units and also to and from at least one shuttle unit. The system also includes a central controller adapted to control the operation of the cell and the shuttle transporting mechanisms, the operation of which is performed in an independent manner via the central controller such that a construction of any arrangement of the cell units is performed to effectively exploit a designated space.

Abstract: An automatic system for replenishing display shelves in retail businesses. The display shelves each including a shelf board having a conveyor belt circulating around the respective shelf board. Each of the display shelves further including a stop bar and a removable fall-off guard at respective front and rear sides of the display shelves to prevent goods from falling off the display shelves and, wherein, the display shelf is designed to cooperate with a shelf-stocking vehicle such that the fall-off guard is automatically opened when the display shelves are refilled by the shelf-stocking vehicle.

Abstract: A microscope slide holding cassette includes a main body for surrounding and protecting microscopes, and shelves capable of holding the microscope slides. The shelves have support members that extend outwardly in order to support label ends of slides. Catches carried at the end of the support members are capable of limiting movement of the slides during transport of the cassette. To transport slides to different workstations, a pickup device can use a vacuum to pick up a slide without contacting areas of the slide that may have glue. The pickup device can load and unload the cassette. The pickup device can have a low-profile configuration in order to access relatively small spaces for processing flexibility.

Abstract: A storage apparatus has an rack of storage bins, a pick head drive unit to drive a pick head to an access location for a selected bin, and a platform drive unit to drive a platform forming part of the pick head into and out of the rack to pick or load packages at a selected bin of the rack. The platform has a cam formation which, in the course of entry of the platform into the rack acting to lift a desired package until the platform reaches a clearance position at which the cam formation clears the package. Subsequent withdrawal of the platform from the rack acts to drag the desired package from the selected bin.

Abstract: In a method for introducing loading auxiliary structures with a transport device into a shelf compartment with storage spaces arranged one behind the other, a loading auxiliary structure is conveyed by the transport device into the shelf compartment to the front storage space in the direction of introduction, after which a further loading structure is moved by the transport device into the shelf compartment to the front storage space and in this way the preceding loading auxiliary structure is moved to the storage space that is behind and the additional loading auxiliary structure is moved into the front storage space. The transport device includes a removing unit with a stop device adjustable at its front end in the introduction direction into the movement path of the loading auxiliary structure and a drive member on a side facing the loading auxiliary structure.

Abstract: A robotic device movable in a vertical direction between rails arranged in multiple rows at various levels with respect to ground. The robotic device has a frame, wheels coupled to the frame for moving the frame along the rails, and a movable platform provided on the frame. The platform is configured for moving the frame in a vertical direction between first rails and second rails arranged above the first rails, and for placing onto the robotic device first and second loads arranged at different levels with respect to the ground.

Abstract: Embodiments of the invention include systems and methods for selective gripping and/or releasing of media cartridges using a robotic ratcheting gripper mechanism. Embodiments operate in context of a data storage library having a number of media cartridges physically located within slots of one or more magazines. A robot with a hand assembly uses a gripper mechanism to retrieve and ferry the cartridges between the magazines and one or more media drives. A novel gripper mechanism is provided that toggles between open and closed states according to movement of the gripper. In some embodiments, movement of a carriage from a retracted to an extended position extends the gripper mechanism and toggles its state, while movement of the carriage from the extended to the retracted position retracts the gripper mechanism while maintaining its state. Certain embodiments implement this functionality with simple mechanical components.

Abstract: Aspects of the present invention relate to use of a MMU. In one embodiment, a method for transporting a media cartridge includes receiving one or more media cartridges from a source media library, storing the one or more media cartridges in a holding portion of a media mobility unit, sensing at least an approximate location of the media mobility unit, and transporting the one or more media cartridges to a destination media library. Additional embodiments are also presented.

Abstract: A specimen storage device capable of easily identifying a specific specimen plate stored in a rack is proposed. The specimen storage device for storing a tested specimen plate in a rack capable of storing a plurality of specimen plates, the specimen storage device including specimen storage section configured to store the specimen plate in the rack, and a control section configured to control the specimen storage section to store a specific specimen plate, whose test result satisfies a predetermined condition, in the rack in a manner distinguishable from a one or more specimen plate, whose test result does not satisfy the predetermined condition.

Abstract: To provide a specimen storage device capable of preventing liquid such as immersion oil and the like attached to the specimen plate from leaking to the outside of the rack and capable of enhancing the operation efficiency by automating the supply and discharge of the rack. Provided is a specimen storage device which stores a imaged specimen plate in a bottomed-shaped rack having an opening at an upper part, the specimen storage device including a rack transport mechanism which transports the rack with the opening directed upward, and a specimen transport mechanism which transports the specimen in an up-down direction, wherein the rack transport mechanism transports the rack to a predetermined specimen storage position, and the specimen transport mechanism stores the specimen to the rack positioned at the specimen storage position from above the rack.

Abstract: A sample sorting apparatus used in a sample processing system comprises a sample supplying apparatus, a sample processing apparatus, and a transporting apparatus connected to the sample processing apparatus. The sample sorting apparatus comprises a first entrance for receiving a sample rack from the sample supplying apparatus, a container conveyor configured to take out a sample container from the sample rack received through the first entrance and configured to set the taken out sample container on a sample rack, a first exit for sending the sample rack on which the sample container is set to the transporting apparatus, a second entrance for receiving the sample rack from the transporting apparatus, a second exit for sending the sample rack received through the second entrance to the sample supplying apparatus, and a transporter configured to transport the sample rack from the second entrance to the second exit.

Abstract: The present invention discloses a storage system for glass substrate and also a method for storing a glass substrate. The storage system includes a rail system, a plurality of stockers, and a trolley. The rail system is configured with first and second interconnected loops of monorails. And a plurality of stockers is arranged adjacent to the rail system. A trolley is moveably arranged to travel along the first and second monorails of the rail system for transporting glass substrates between the stockers. Accordingly, the yield of the liquid crystal display panel can be increased, while the maintenance costs of the overhead shuttle can be lowered.

Abstract: A handling device may include a frame and a carriage movably mounted on the frame. A clip assembly may be attached to the carriage and be adapted to frictionally engage a portion of an electronic device. The handling device may include at least one slot guide member attached to the frame. The slot guide member is adapted to engage within one of a plurality of slots of a magazine for holding electronic devices.

Abstract: A system for storing and picking storage units including a rack arrangement having a plurality of racks, a plurality of rack-bound vehicles adapted to travel in a rack aisle for storing and retrieving the storage units into and from the storage locations in a transversal direction, wherein a rack-integrated lifter includes a load-handling device for transferring storage units between a rack-integrated handing-over location and at least one rack-integrated buffer location arranged only vertically beneath, or only vertically above, the handing-over location and at a transferring device for exchanging storage units between a feeding/discharging conveyor and the handing-over location.

Abstract: Storage device for storing and/or retrieving articles from storage, includes a frame having a first series of mutually parallel elongated storage sections, preferably positioned in a column set-up, that extend between a first end and a second end of the frame; a number of holders for the articles; storage sections being provided with holder supports, wherein at the first and second ends of the frame, first and second platforms, respectively, have been arranged for accommodating at least one holder; and first movement elements for moving the platforms, from one storage section to another; second movement elements for horizontally moving at least one holder from the first platform at the first end of the frame to the holder supports of a selected storage section while moving one or more holders from the selected storage section to the second platform at the second end of the frame, and vice versa.

Abstract: Rack storage and retrieval device for a rack storage facility, the rack storage and retrieval device comprising a carriage with a carriage drive to move the carriage on a base, a loading/removing rod that can be displaced by means of a lifting drive transverse to the base, at least one loading drive arranged on the loading/removing rod to load the rack storage facility with goods, and a separating unit for a separate removal of the goods from the rack storage facility.

Abstract: A tube sorter comprising: a rack stocker configured to have stocked therein a sample rack capable of holding one or more sample tubes; a transporting section configured to transport a sample rack; a tube conveyor configured to perform an unloading operation of unloading a sample tube from a sample rack that was transported by the transporting section and a loading operation of loading the sample tube onto a sample rack supplied from or stocked in the rack stocker; and a rack conveyor configured to convey an empty sample rack or a sample rack to be emptied to the rack stocker, is disclosed.

Abstract: A system for assembling and dispensing an order made up of one or more individually packaged items from a plurality of different individually packaged items includes a storage module containing one or more packages of each of the items, and a conveyor having selectively assignable spaces configured to receive the packaged items associated with a particular order and to transport the packaged items to a processing location. A pick device is movable relative to the storage module and is configured to retrieve a package from the storage module. A transfer station adjacent the conveyor receives one or more of the packaged items from the pick device and an actuator associated with the transfer station moves the packaged items from the transfer station to the conveyor when the assigned space associated with the order is in registration with the transfer station.

Abstract: Order allocation techniques pertaining to stops that a container makes in the process of fulfilling a customer order is disclosed. In one embodiment, this is accomplished by first identifying a pod that stocks the largest number of different items in a customer order. Then, a second pod is identified that stocks the largest number of remaining items in the customer order. The collection of pods defines a container path through the distribution center.

Abstract: A traveling body of a stacker crane is separable into a lower traveling portion and an upper traveling portion by separating a post into a lower post portion and an upper post portion, in which the lower traveling portion in a separated state separated from the upper traveling portion and supporting a lift body is moved in a width direction with its traveling posture being maintained to be taken in or out between a moving space and a take-in/out space.

Abstract: An article storage facility includes a transport device for transporting the transporting containers to the plurality of storage units, a controller, and a supply state detecting device for detecting a supply state of the inactive gas to the plurality of storage units. The controller makes a determination based on detected information from the supply state detecting device as to whether the inactive gas is properly supplied, and manages the plurality of storage units by distinguishing the disallowed storage units for which it is determined that the inactive gas is not properly supplied from the allowed storage units that are the storage units that are not the disallowed storage units. The controller performs a retreating transport operation in which a transporting container, that is stored in the storage unit that is changed from the allowed storage unit to the disallowed storage unit, is transported to an allowed storage unit.

Abstract: Automated handling systems move container through storage facilities with transfer elements that move to storage spaces, to an elevator, a margin space, and/or to a loading/unloading point. Different assemblies, arms, and structures are useable in these areas, including multiple arms and assemblies to uniformly and automatically move containers through the several different system parts. Containers may be fully-supported while stationary or moving by the handling systems, and securing structures, drives, and/or sensors are useable with each of the arms, assemblies, and spaces. A universal controller can communicate with and control every element of the systems, permitting coordinated and automated handling of many containers throughout the system. Storage and/or retrieval algorithms for containers may be programmed into the controller to automatically move containers from/to a loading/unloading point to/from a storage space.

Abstract: A material handling system includes an overhead rack defining a plurality of storage positions. The overhead rack defines at least one interior window devoid of storage locations. First and second side rails are disposed above the overhead rack. A first cross rail is movably coupled to the first and second side rails. A first transport vehicle movably is coupled to the first cross rail and operable to descend below the overhead rack through the at least one interior window.

Abstract: A system of shuttle cars for transporting a vehicle in an automated parking facility. Each shuttle car includes an x-shuttle that supports two z-shuttles. The z-shuttles move from the x-shuttle and under the vehicle for transport. The z-shuttles locate and engage the front and rear tires of a vehicle to lift the vehicle from the floor. Once the z-shuttles have engage the vehicle tires, the z-shuttles return to the x-shuttle so that the x-shuttle can transport the vehicle (and the z-shuttles) to and from the appropriate parking space.

Abstract: The invention relates to a method and a transport device (207) for positioning loading aids (208) prior to the transfer thereof into a shelf compartment (209) on storage spaces (211a to 211d) arranged behind one another using a transport device (207). The loading aids (208) are positioned against one another, behind one another against a first stop device (243 to 247) of the transport device (207) in the transfer direction (210), then a separating device (256, 257) is adjusted in the movement path (251) between the loading aids (208) and the front loading aid (208) in the transfer direction (210) is positioned against the separating device (256, 257) and the rear loading aid (208) in the transfer direction (210) is positioned against a second stop device (243 to 247) of the transport (207) in the transfer direction (210). Afterwards a third stop device (243 to 247) is adjusted between the separated loading aids (208).

Abstract: There is provided a storage system for storing and retrieving watercraft or other items to or from a storage position in a storage area as part of an enclosure having a plurality of storage areas. The storage system may include at least one carrier to support the item during movement to or from a storage position, and a positioning system to move the carrier system. An elevator system is usable to move the positioning system and carrier system to and from a storage area, and a control system is usable to control the positioning system to move the carrier system and item into and out of its storage position.

Abstract: A mobile drive unit is provided for transporting an inventory holder. The mobile drive unit is operable to dock with the inventory holder, move the inventory holder in a first translational direction, and while docked with the inventory holder, selectively rotate the inventory holder while continuing to move in the first translational direction.

Abstract: A method and apparatus is provided for the automated discharge of treated sewage sludge to trucks, via inventory management by tracking the flow of sludge from bins in which it is located to trucks, on a first-in/first-out basis, including automated truck positioning, automated precision truck loading and monitoring and controlling the various interrelated components via a PLC computer program.

Abstract: An apparatus and method determines the location of wafer boat plate elements having a plurality of plate elements arranged substantially parallel to each other. At least three sensors are moved along travel paths perpendicular to the plate elements, wherein at least a first travel path is above, at least a second travel path is below the wafer boat and at third travel path is laterally spaced from the first or second travel paths above or below the wafer boat. During this movement the position of the sensors along a respective travel path is determined continuously, and it is determined, in which position a respective plate element enters the measuring area of a sensor and exits the same. A distance between a sensor and an edge of a plate element is measured and the location of a respective plate element is determined by means of the sensor signals.

Abstract: The invention generally provides methods and devices for handling materials including the sorting or storing of waste. The invention further provides a modular materials handling and storage workstation unit for sensitive materials such as hazardous materials or waste common in a retail environment.

Abstract: A pharmaceutical storage and retrieval device and a method of accessing and loading the device. The device includes a housing, at least one port with controlled access to inventory stored within the device, a robotic transfer mechanism for moving inventory items to and from the controlled port, software for tracking the inventory and users of the device, and an interface with the pharmacy software system to track and monitor which inventory is authorized for access by each user and which inventory is needed to fill a prescription.

Abstract: The article storage device (1) includes a warehouse (2) including racks (21) to store articles (A), a cage (4) suspended from a crane (3) so as to go up and down, and a carriage (5) disposed on the cage (4). The cage (4) includes outriggers (6) capable of extending and retracting to the racks (21) and of being engaged with the racks (21). The racks (21) each include first engagement portions (7) disposed at portions with which the outriggers (6) are engaged, and a second engagement portion (8) disposed adjacent to one first engagement portion (7) in an extending and retracting direction of the outriggers (6). The second engagement portion (8) is capable of positioning one outrigger (6). One outrigger (6) is engaged with the second engagement portion (8) disposed in a side to which the carriage (5) travels, and the other outriggers (6) are engaged with the first engagement portions (7).

Abstract: During picking products (P) stored in high-bay racking (R), the products are transported to manual goods-to-person picking stations (M1-M8) by means of a conveyor system (2). Order transport units (B) can be supplied to the goods-to-person picking stations (M1-M8), into which order transport units products supplied to the goods-to-person picking stations (M1-M8) are picked manually according to picking orders. All products (P) of the high-bay racking (R) which are to be picked manually can be supplied to all goods-to-person picking stations (M1-M8). If a picking order includes products (P) to be picked manually, at least one order transport unit (B) is allocated to those products to be picked manually, wherein each order transport unit is supplied to only one manual goods-to-person picking station (M1-M8) at which all products to be picked manually which have been allocated to this order transport unit are picked.

Abstract: A load handling device of a storage and retrieval device, which can travel in a longitudinal direction along a storage and retrieval side of a storage rack and can be positioned in front of the storage and retrieval side so that storage goods can be stored and retrieved in a transverse direction, including a loading platform; at least one tine comb comprising a plurality of tines which are substantially oriented along the transverse direction and are distanced to each other so that each of the tines can engage a space between neighbouring cantilever arms of the storage rack for delivering or lifting one or more of the storage goods on the cantilever arms or from the cantilever arms.

Abstract: Embodiments of the invention include systems and methods for selective gripping and/or releasing of media cartridges using a robotic ratcheting gripper mechanism. Embodiments operate in context of a data storage library having a number of media cartridges physically located within slots of one or more magazines. A robot with a hand assembly uses a gripper mechanism to retrieve and ferry the cartridges between the magazines and one or more media drives. A novel gripper mechanism is provided that toggles between open and closed states according to movement of the gripper. In some embodiments, movement of a carriage from a retracted to an extended position extends the gripper mechanism and toggles its state, while movement of the carriage from the extended to the retracted position retracts the gripper mechanism while maintaining its state. Certain embodiments implement this functionality with simple mechanical components.