Abstract: a robot controller ensures the maintenance work property and the safety and practically uses a space in a housing of the robot controller. A controller for an industrial robot is provided with a first housing (1) for accommodating first internal devices (6), a second housing (2) for accommodating second internal devices (7), and a front door (3) supported by a first hinge (4), which is provided on a side of the first housing (1), being capable of freely opened and closed, wherein a second hinge (5) is provided on the sides of the first (1) and the second housing (2) and the entire first housing (1) is supported by the second hinge being capable of freely opening and closing with respect to the second housing (2).

Abstract: A shelving includes two tracks, two pair of end pieces, a stationary shelving unit attached to one of the two pair of end pieces and including a plurality of posts and a shelf, a mobile shelving unit includes a plurality of posts and a shelf supported by the posts, and a plurality of wheels adapted to roll on the tracks. Each of the tracks includes a plurality of bases, each base having a rail channel on a top and a recess on a bottom, a plurality of rails disposed in the rail channel with the first rail end projecting beyond the first base end and with the second rail end being recessed from the second base end, and a coupling member disposed in the recess of the track base, joining the first base end to another base end.

Abstract: A storage system having mobile storage units and lock means for securing a plurality of the storage units. A storage system having mobile storage units, door means, and lock means for securing a plurality of the storage units. A method for securing a storage system having mobile storage units and lock means.

Abstract: A driving mechanism having a braking system, for use on a storage unit movable about guiding tracks, The driving mechanism comprises a frame rotatably carrying at least one driving wheel, which in turn rollably engages a floor-embedded guiding track, A toothed wheel rotatably carried by the frame is operatively connected to the driving wheel and rotates in synchronism therewith, and defines at least one first interlock member, The driving mechanism also comprises a gravity-biased second braking member defining at least one second interlock member, said second braking member movably mounted to the frame so as to be movable between a standby position in which the second interlock member clears the first interlock member, and a braking position in which the second interlock member is interlocked with the first interlock member to block rotation of the rotary first braking member and thus of the driving wheel, The second braking member is biased under the action of gravity towards the braking position when it is

Abstract: The present invention is a mobile storage unit including an electric motor operably connected to wheels movably supporting the unit, and a motor brake operably connected to the electric motor. A shaft is rotatably mounted to the unit and supports the wheels on which the unit moves, and is engaged with an electric motor. The electric motor operates to rotate the shaft and the wheels to move the unit in the desired direction. Upon deactivation of the motor, the motor brake, which is also engaged with the shaft, operates to prevent any further rotation of the shaft to maintain the mobile storage unit in a specified location regardless of deflection of the surface on which the storage unit is positioned.

Abstract: A cabinet assembly has at least one cabinet. Each cabinet is a frame and has multiple erect bars, a front board, a rear board, a bottom board, a left opening, a right opening, a wheel assembly and an inner chamber. The wheel assembly is mounted on a lower surface of the bottom board and has multiple wheels and a substrate. The wheels are mounted on the lower surface of the bottom board. The substrate is mounted below the bottom board and contacts to the wheels, allows the wheels to slide on the substrate and holds the cabinet. The inner chamber is formed between the front board, the rear board and the bottom board and communicates with the left opening and the right opening. Therefore, users put the objects from both the left opening and the right opening, so the cabinet assembly is very convenient for the users.

Abstract: A brake for retaining a mobile carriage on which apparatus such as storage facilities are located. The brake includes a pivot member with a release end and a locking end and with a claw at the locking end. The claw engages a slotted member when the locking end is depressed. The opposite end of the pivot member from the locking end is the release end. Adjacent the release end is a slot which rides on a stoop pin to prevent the release end from being depressed below the horizontal.

Abstract: A mobile storage system includes movable storage units that can be positioned to selectively form an aisle between adjacent storage units. The storage units define a maximum aisle space that forms a single aisle between an adjacent pair of storage units, or a number of aisles between several adjacent pairs of storage units by distributing the maximum aisle space between at least two aisles. A control arrangement controls the position of the storage units, in response to user commands, so as to form the aisles. The control arrangement may be configured such that, when a pair of aisles are present between two pairs of storage units, one of the aisles is closed based on certain criteria when a command to open a different aisle is initiated. The criteria may be user defined, or may be a characteristic such as the frequency of use of the aisles such that the more frequently used aisle remains open and the less frequently used aisle is closed.

Abstract: An electrically driven mobile storage system employing guides along which the storage units move as means of electric transmission to minimize the dangers of electric shock.

Abstract: A modular storage system for installation on a floor includes a plurality of carts. Each cart includes a base that generally has a length that separates opposed ends of the base, a storage structure that is operably attached to and carried by the base, at least three pivotable wheel assemblies, the wheel assemblies being operably attached to and extending below the base to provide a rolling surface adapted to roll on the floor, and at least one track follower mechanism that is operably attached to one end of the base and having at least a portion of which is selectively vertically movable to engage the track.

Abstract: A mobile storage unit system includes a vehicle guide arrangement that navigates a forklift or other vehicle along aisles formed between mobile storage units. The vehicle guide arrangement allows an operator to identify the aisle containing a desired loading or unloading point and the guide arrangement defines a path of travel for the vehicle along that aisle to ensure that the vehicle has sufficient room to perform the loading and unloading functions. The mobile storage unit system may also include one or more perceptible indicators, such as lamps, that provide the operator a signal when an aisle is fully open and ready to receive the vehicle. A corresponding signal may also be provided to the vehicle guide arrangement so that the vehicle is not navigated along an aisle until the aisle is fully open. This ensures that the vehicle has the space needed to maneuver during the loading and unloading process.

Abstract: Attached to an upper end or rear sidewall of each of a plurality of movable racks is a hollow tube mounted on a rectangular plate in two places on each rack. Passing through the hollow tubes of each of the plurality of movable racks is a solid rod having a diameter of one to two inches. The solid rod is anchored at opposite ends on two stationary or fixed racks to facilitate sliding of the plurality of racks across a floor. No special equipment is required to maximize floor space for storage of tires.

Abstract: A storage system (1) for cleaning cloths (2) is provided that comprises at least one container (3) and two rails (5) that can be attached to the cleaning cart (4), with the container (3) being slidably supported in the rails (5), and with the rails (5) and the container (3) comprising a fixture (6), by means of which the container (3) can be locked at least into one position.

Abstract: A folding bookcase or other furniture or wall unit having a rolling mechanism guided along a floor track, the rolling mechanism supporting a substantial portion of the weight of the unit.

Abstract: The disclosure relates to aisle width sensor for a mobile storage system for determining the width between adjacent movable storage units, particularly when creating an aisle therebetween. The sensor includes a first bracket which is slidable with respect to a second bracket. The first and second brackets are attached to respective first and second arms of a scissor arm arrangement between the adjacent storage units. The sensor provides an output, particularly an analog output, which is proportional to the distance between the adjacent storage units and therefore simple to calculate and process for the central controller of the mobile storage system.

Abstract: A system for mounting a member such as a rail to a support surface such as a floor, made of a precast concrete material, without penetrating the floor. The rail mounting system includes a base plate secured to the upper surface of the floor via an adhesive, with one or more connectors extending upwardly from the base plate. An anchor plate is secured to the rail, and adjustment screws are interconnected with the rail for adjusting the elevation of the rail relative to the base plate. When the desired elevation of the rail is attained, engagement members such as nuts are secured to the threaded connectors extending upwardly from the base plate, to fix the height of the anchor plate, and thereby the rail. A grout layer is then applied between the base plate and the anchor plate. After the grout layer is set, the leveling screws are removed and a topping layer of concrete is applied over the components of the mounting system so as to encapsulate the base plate, the anchor plate and the engagement members.

Abstract: A mobile storage system includes movable storage units that can be positioned to selectively form an aisle between adjacent storage units. The storage units define a maximum aisle space that forms a single aisle between an adjacent pair of storage units, or a number of aisles between several adjacent pairs of storage units by distributing the maximum aisle space between at least two aisles. A control arrangement controls the position of the storage units, in response to user commands, so as to form the aisles. The control arrangement may be configured such that, when a pair of aisles are present between two pairs of storage units, one of the aisles is closed based on certain criteria when a command to open a different aisle is initiated. The criteria may be user defined, or may be a characteristic such as the frequency of use of the aisles such that the more frequently used aisle remains open and the less frequently used aisle is closed.

Abstract: An adjustable furniture assembly having a support structure for receiving a bridge of the furniture assembly is described. The support structure includes a horizontal support member which receives the bridge in a slidable engagement to provide the furniture assembly with adjustability in a right or left direction. The horizontal support member is further adjustable to provide the furniture assembly with adjustability in a vertical direction.

Abstract: The invention provides longitudinally extending track support and track members for a mobile storage unit. The track support's upper surface has at least one protrusion which projects above and extends longitudinally along that upper surface. A mating recess extends within and along the track member's under surface. The recess and protrusion are sized and shaped for loose-fit longitudinal engagement of the protrusion within the recess when the track member is laid atop the track support. This permits limited transverse movement of the track member with respect to the track support, reducing susceptibility of the mobile storage unit's wheels to derailment if a transverse force is applied to mobile storage unit as it rolls along the track.

Abstract: A shelving system includes at least two parallel lengths of track, at least two pair of end pieces disposed on opposite ends of each of the at least two lengths of track, and a stationary shelving unit attached to one of the at least two pair of end pieces, with the stationary shelving unit including a plurality of posts and a shelf supported by the plurality of posts, and a mobile shelving unit, which includes a plurality of posts, a shelf supported by the plurality of posts, and a plurality of wheels adapted to roll on the at least two lengths of track.

Abstract: A splice arrangement for rail sections in a rail-mounted mobile system, such as a mobile storage system. The rail arrangement includes first and second rail sections, each of which has a base member and a support member defining a support surface for supporting the movable member of the mobile storage system. The base members of the adjacent rail sections are adapted for placement adjacent each other to form a joint therebetween. The support members of the adjacent rail sections are also adapted for placement adjacent each other to define a joint therebetween. The support member joint is offset from the base member joint, such that the support member joint overlies a lower wall defined by one of the base members. The ends of the support members further include a tongue and groove arrangement for maintaining the support members in horizontal alignment with each other.

Abstract: A track system for high density mobile storage comprises parallel tracks each receiving a rail on which mobile carriages roll. The tracks are supported off a building floor by multiple transverse leveler channels. A pair of insert nuts are immovably held in each leveler channel. Elevator bolts rest on the building floor and engage the insert nuts. Turning the elevator bolts adjusts the height of the tracks above the building floor. Deck channels have holes in opposite ends that fit over the insert nuts of two leveler channels secured to the two tracks. The deck channels thus space the tracks parallel to each other. A deck panel is supported by and joined to both a wing of each track and the deck channels. Additional leveling devices are used to support the deck channels off the building floor.

Abstract: The shelving system has a number of electrically powered shelf units movable over ground, each shelf unit including an electronic circuit controlling the displacement of the shelf unit, a power cord connected to the shelf unit with of a power terminal rod, for feeding power to the shelf unit, and a network cable connected to the shelf unit with a network terminal rod, for allowing information to be exchanged with the electronic circuit. The shelving system further has a wire track that may be embedded in the ground, the wire track including an elongated main body having a hollow power wire channel housing the power cord and having an elongated opening allowing access to the power wire channel and forming an elongated power raceway allowing the power terminal rod to extend from the power wire channel to the shelf unit through the power raceway and to slide along the power raceway.

Abstract: An anti-tip arrangement for a mobile system, such as a mobile storage system, in which a movable member is mounted to a rail arrangement. The anti-tip arrangement includes an anti-tip member which is pivotably mounted to the movable member for movement between an operative position and an inoperative position. The anti-tip member has a hook section that is engageable with an engagement surface of the rail arrangement, for preventing tipping of the movable member relative to the rail arrangement. The anti-tip member further includes a retainer section and a tab section that extend in opposite directions from the pivot axis about which the anti-tip member is pivotable. The tab section extends laterally from the pivot axis, and is engageable by a user to enable the user to pivot the anti-tip member to the operative position.

Abstract: A system for mounting a member such as a rail to a support surface such as a floor, made of a precast concrete material, without penetrating the floor. The rail mounting system includes a base plate secured to the upper surface of the floor via an adhesive, with one or more connectors extending upwardly from the base plate. An anchor plate is secured to the rail, and adjustment screws are interconnected with the rail for adjusting the elevation of the rail relative to the base plate. When the desired elevation of the rail is attained, engagement members such as nuts are secured to the threaded connectors extending upwardly from the base plate, to fix the height of the anchor plate, and thereby the rail. A grout layer is then applied between the base plate and the anchor plate. After the grout layer is set, the leveling screws are removed and a topping layer of concrete is applied over the components of the mounting system so as to encapsulate the base plate, the anchor plate and the engagement members.

Abstract: A storage cabinet for use in an office environment including a stationary housing defining a hollow interior which opens frontwardly, and a drawer-type cart defining storage space thereon which is movable into the interior of the housing when not in use and out of the housing when access to the storage space is desired. The cart mounts thereon a wheel or roller arrangement on a lower front end thereof for engagement with a floor surface, and a roller arrangement at an upper rear end thereof which is engaged within a track or rail mounted along a top of the housing so as to suspend a rear end of the cart therefrom.

Abstract: A splice arrangement for rail sections in a rail-mounted mobile system, such as a mobile storage system. The rail arrangement includes first and second rail sections, each of which has a base member and a support member defining a support surface for supporting the movable member of the mobile storage system. The base members of the adjacent rail sections are adapted for placement adjacent each other to form a joint therebetween. The support members of the adjacent rail sections are also adapted for placement adjacent each other to define a joint therebetween. The support member joint is offset from the base member joint, such that the support member joint overlies a lower wall defined by one of the base members. The ends of the support members further include a tongue and groove arrangement for maintaining the support members in horizontal alignment with each other.

Abstract: A heavy-duty workbench with strong metal legs and a thick hardwood top. The workbench can provide docking space for three modules that can function as an additional work surface when pulled out from under the workbench or when used alone. The modules can be provided with an optional hardwood top. The modules can have large heavy-duty casters to facilitate easy movement for use and cleaning. The workbench and modules are designed for use in non-climate controlled spaces such as a garage where temperature and humidity extremes are common. Electrical outlets can be provided in an optional backsplash mounted at the rear edge of the workbench.

Abstract: A mobile storage system includes a series of carriages which are movably mounted to a series of rails supported on a surface such as a floor. Storage units, such as drawer-type file cabinets, are adapted to be engaged with each carriage, and are movable on the rails along with the carriages. Each carriage is modular in construction, and incorporates a series of mobile housing assemblies interconnected by a structural cross-brace arrangement. At least one end of the carriage includes an end panel arrangement which overlies a sidewall of an endmost one of the storage units. The end panel arrangement includes a frame defining an interior, and one or more cover members are demountably secured to the frame so as to selectively cover the interior of the frame and to conceal the sidewall of the endmost storage units. A series of retainer members are interconnected with each carriage, and interact with the rails so as to prevent upward movement of the carriage relative to the rails.

Abstract: A product inventory control system is provided that utilizes both fixed and movable racks. The present system may be utilized in a walk-in display cooler or other product storage application to help with inventory management and to provide easy access to stored product. The racks of the present system include shelf support members that are selectively positionable at a plurality of different orientations so as to achieve different product support surface orientations relative to a horizontal The shelf support members are adapted for storing a plurality of different types of products and product containers. Movable racks are positioned in front of fixed racks whereby movement of a movable rack provides access to a rack positioned therebehind.

Abstract: A double-stack tool rack is constructed to include a base having an upright pivot shaft, a plurality of tool boxes respectively pivoted to the upright shaft and arranged into two stacks, and a carrying handle coupled to the upright pivot shaft of the base at the top.

Abstract: The wheeled skate includes an inverted U-shaped elongated channel member, two housings, and two wheels. The channel member has apertures formed in the top near both ends of the member. Each housing is in an inverted U-shape and has a rounded portion covering one end. Apertures are formed in the top and sides of each housing. Each wheel has a bushing and axle that pass through the center thereof. The wheel is inserted into its respective housing so that the axle fits into the apertures formed within the sides of the housing. Each housing is then secured within an end of the channel member. A bolt is inserted through each aperture formed within the top of the channel member and is secured to the bottom of the storage device. In a second embodiment, the wheel is secured directly to the elongated channel member via a bolt.

Abstract: A mobile storage system includes carriages mounted to rails supported on a floor, for mobilizing storage units such as drawer-type file cabinets. Each carriage incorporates mobile housing assemblies interconnected by a cross-brace arrangement. One end of the carriage includes an end panel arrangement that overlies a sidewall of an endmost storage unit, and which includes a frame and one or more cover members demountably secured to the frame so as to conceal the sidewall of the endmost storage unit. Each carriage includes retainers that interact with one of the rails so as to prevent upward movement of the carriage relative to the rails, and also function to mount one of the storage units to the carriage. The carriages and the rail and floor system are modular, enabling the components of the system to be shipped knocked-down and assembled on site, and to be expanded or contracted after installation.

Abstract: A single-stack tool rack is constructed to include a base having an upright pivot shaft, a plurality of tool boxes respectively pivoted to the upright shaft and arranged into a stack for keeping tools and/or accessories, a swivel case pivoted to the base and turned in and out of a bottom open chamber of the base for keeping tool bits, and a carrying handle formed of a handle body and a detachable hand tool and coupled to the upright pivot shaft of the base at the top.

Abstract: A brake for retaining a mobile carriage on which storage facilities are constructed and having a slidable actuating assembly with a claw which engages a slotted member when the actuating assembly is depressed. The mobile carriage is mounted on a platform with a track in which the mobile carriage rolls and with a channel in which the slotted member is secured. A back plate is used to mount the brake on the mobile carriage. A cover is mounted on the back plate and an actuating assembly extends through and is slidably mounted in the pair of openings in the cover so that the actuating assembly may move to and from the platform.

Abstract: A movable storage assembly includes at least one storage unit defined by a frame structure and having a roller member secured to each of the upper corners of the frame structure. A pair of roller tracks are mounted above the at least one storage unit and aligned to structurally receive the roller members secured to the frame structure. The storage unit is suspended in an upright stored position and is movable along the roller tracks from a stored position to an accessible position.

Abstract: A reticle storing movable rack system comprises a plurality of flat tracks fixedly secured to a floor. There is provided a plurality of rows of storage units. Each row has a plurality of independent racks interconnected with each other, which racks are adapted to be moved as a single row along the flat tracks. A user engageable drive assist mechanism is provided to move the rows. Each of the racks comprises shelves with plurality of cells for housing reticles. The racks are electrically grounded, and the cells are made metallic and electrically connected to the racks to secure electrostatic shielding properties. With the purpose of imparting antiseismic properties to the system, the shelves are made with a slope inside the racks, the slope being preferably about 8°.

Abstract: A plurality of wheeled cabinets, including single-sided cabinets (20) and double-sided cabinets (21), is movably mounted upon fixed rail assemblies (90) and (90A). Each cabinet is fitted with an extendable privacy partition (80), an automatically deployed safety-spacer assembly (110), and is capable of accepting both factory-finished and custom-fabricated furniture and fixture infill packages (24) that provide the activity spaces (23) created in between the cabinets with all of the appurtenances necessary to particularize these spaces into functionally specific rooms. A continuous conductor rail (100) supplies power, telephone, and data to the residential program deck.

Abstract: A product inventory control system is provided that utilizes both fixed and movable racks. The present system may be utilized in a walk-in display cooler or other product storage application to help with inventory management and to provide easy access to stored product. The racks of the present system include shelf support members that are selectively positionable at a plurality of different orientations so as to achieve different product support surface orientations relative to a horizontal The shelf support members are adapted for storing a plurality of different types of products and product containers. Movable racks are positioned in front of fixed racks whereby movement of a movable rack provides access to a rack positioned therebehind.

Abstract: A storage unit having at least one movable storage module is provided. According to the invention, the storage unit includes at least one support device having at least one support rail. A carrying device interconnected to the storage module engages the support device, thereby carrying at least a first portion of the weight of the storage module. A rolling device interconnected to the storage module engages the floor to carry a second portion of the weight of the storage module. The provided storage unit allows heavy loads to be carried by the movable storage module along a path defined by the support device.

Abstract: The modular moving carts include removable, attachable shelf storage units which are useful in two, three or four different positions. By changing the relative positions of the units, i.e., standing and facing one direction, they form bookcases/storage areas having a depth to accommodate books, or to form deep shelves to accommodate computers, typewriters, etc., and in a position lying down, to form a container or bin. The cart includes a rectangular base member having four outer edges adapted to support and retain two or more shelf storage units and has a predetermined width, a predetermined length and a predetermined area (based on the width multiplied by the length), with a plurality of wheels attached thereto. There is also at least one first type of shelf storage unit and at least one second type of shelf storage unit included in the present invention.

Abstract: A loudspeaker box arrangement has a plurality of loudspeaker boxes. Adjacent boxes are actively connected to one another by connecting elements in a positionally adjustable manner. Adjacent boxes are pivotally connected at their front sides and joined by the connecting elements at their rear sides for adjusting the pivot angle between boxes. The connecting elements are automatically adjustable as to angle and/or length by a control unit for achieving the individual positional adjustment of a particular loudspeaker box.

Abstract: A storage assembly includes a storage cabinet removably mounted to a wheeled base which is supported by a supporting surface such as a floor. A guide assembly is interconnected with the floor and the base for guiding movement of the base in a longitudinal direction, so as to provide movement of the storage cabinet between an extended position and a retracted position in response to application of an axial pull-out or push-in force to the cabinet. The guide assembly includes an inner mounting member secured to the floor, and an extendible and retractable guide mechanism extends from the inner mounting member. The guide mechanism may be in the form of a telescoping drawer slide assembly including a fixed-position member secured to the inner mounting member and an extension member secured to and interconnected with the base and slidably mounted to the fixed-position guide member.

Abstract: An infrared receiver mount is disclosed that is capable of directional reception with discrete positions and is applicable for use in a mobile carriage system. An infrared receiver is mounted within a conical section of an outer cover which directs the infrared receiver to receive infrared transmission from a first given angle of reception. The outer cover contains a plurality of grooves, which are engageable with a plurality of tabs located on a base plate to prevent rotation of the infrared receiver. The tab and groove system provides a discrete number of directions for the infrared receiver to receive infrared transmission from a second angle of reception. While this second angle of reception is adjustable, the first angle of reception is predetermined. In one application, the infrared receiver is mounted to the lower portion of a carriage in order to receive light beams from an infrared transmitter.

Abstract: A work space 10 is provided which incorporates structures 12 in order to flexibly divide the workspace 10 into areas 14. The structures 12 are moveable to adjust the prospective sizes of the areas 14 as required by differing business teams over a commercial project lifespan. The structures 12 incorporate a plurality of facilities normally required by staff such as telephone and power connections etc.

Abstract: An attractive single-piece operator interface for high density mobile storage conveys an intuitive meaning to operators. The operator interface includes a bezel mounted to the outside of a mobile carriage panel. Self-leveling buttons are pivotally connected by living hinges to openings in the bezel. The buttons are in operative association with respective switches in a control assembly on the inside of the mobile carriage panel. A base on the control assembly limits pivoting of the buttons. The operator interface is made of ABS plastic material. The buttons are preferably shaped to indicate the directions of mobile carriage travel. The bezel further includes holes that receive light emitting diodes that are part of the control assembly.

Abstract: A modular shelf moving cart includes a base with a plurality of wheels for permitting movement of said base, a first shelf retaining unit which is removably fastened to the base and which extends vertically from the base, and a second shelf retaining unit removably fastened to the base adjoining the first shelf retaining unit. The second unit is configured so as to permit 180 degree rotation thereof in order to engender a first configuration having dual open sided shelf unit with a central dividing wall and a second configuration having a single open sided shelf unit with a rear wall thereby doubling the side-to-side storage depth capacity of the modular shelf moving cart.

Abstract: An extension and retraction system for an article of furniture, such as a storage unit, includes a mounting structure for securement to the storage unit, a base arrangement for mounting to a floor or other supporting surface, and a cantilever-type extension and retraction arrangement interposed between the mounting structure and the base arrangement. The extension and retraction arrangement is in the form of a plurality of slide assemblies, each of which includes a stationary inner guide member mounted to the base arrangement mounted to each stationary guide member for telescoping inward and outward movement. Each extension member is connected to the mounting structure, and exertion of a pull-out or push-in force on the article of furniture is transferred through the mounting structure to cause extension and retraction of the extension members, to provide movement of the article of furniture between an extended position and a retracted position.

Abstract: A large capacity mobile storage system having a plurality of storage units and a plurality of interconnected support assemblies for rolling movement. Each of the support assemblies includes a frame and a pair of spherical shaped hardened steel support wheels. Only one of the support assemblies includes a pair of guide rollers disposed perpendicular to its associated support wheels in order to maintain rolling movement of the storage system along a linear path. The support wheels of the other support assemblies are allowed to move independently from one another in order to prevent the scrubbing action of the supporting apparatus. The supporting assemblies also include a drive track and a sprocket disposed at one end of the storage unit with a drive mechanism. This feature helps to keep the floor area between the flat tracks uncluttered. The apparatus compensates for a significant degree of unlevelness and undulation of the flat tracks caused by an unlevel floor upon which the flat tracks are mounted.

Abstract: A safety system for high density mobile storage utilizes a photoelectric transmitter that cyclically emits an intermittent beam at a predetermined frequency into an aisle adjacent a mobile carriage. Two or more transmitters can be arranged in each of one or more clusters on the carriage. The intermittent beams are directed to photoelectric receivers across the aisle. Each receiver sends a signal to reset an associated counter each time the receivers detect an intermittent beam. As long as every receiver detects at least one intermittent beam at the predetermined frequency, the mobile carriage is enabled to move. The receivers can be on the same mobile carriage as the transmitter to protect a vertical plane close and parallel to the front face of the carriage.