Abstract: In an industrial machine, the work safety is further improved by eliminating blind spots from an image displayed on a monitor. A hydraulic excavator 1 which is the industrial machine is equipped with monitoring cameras 15F, 15B, 15L, 15R mounted in the respective places of a revolving upperstructure 3 in order to capture images for monitoring. A monitor 20 displays camera images 21F, 21B, 21L, 21R obtained by the cameras as well as an icon image 21C of an image illustration of the hydraulic excavator 1. The cameras 15F, 15L, 15R are mounted at the distal ends of support arms 40F, 40L, 40R to be located in positions jutting from a revolving upperstructure main unit 3a of the revolving upperstructure 3, so that a hidden area under the underside of a catwalk 14 provided on the revolving upperstructure 3 falls within the field of view.

Abstract: The present invention relates to a particularly compact and safe extendable access device for gaining access to elevated locations via a hatch opening. The access device comprises a telescopic ladder with a plurality of sliding elements movable between an extended position and a retracted position, each sliding element comprising two stiles connected by a rung. The stiles of each sliding element are interlocked with the stiles of adjacent sliding elements, wherein each sliding element comprises a first locking mechanism for releasably connecting at least one of the stiles to an adjacent stile of an adjacent sliding element, the first locking mechanism being adapted to lock each sliding element in its retracted position.

Abstract: A personnel elevator assembly is provided to enable a person to gain access to the elevated platform of a combine with the combine having a ladder assembly extending downwardly from the platform. The elevator assembly is secured to and is supported by the ladder assembly and includes an elevator step which is movable from a position close to the ground to a position thereabove so as to be at approximately the same level as the platform.

Abstract: An access ladder includes a plurality of sections connected together to telescope between an extended position and a retracted position that has an increasing reactive force to counterbalance the weight of the sections as they extend. A method for accessing a room with a ladder connected to a ceiling including the steps of moving the ladder to a fully extended position subject to an increasingly active force to counterbalance the weight of the ladder as it extends. There is the step of retracting the ladder into a retracted position in the ceiling.

Abstract: A jack plate ladder comprises a jack plate mount having a ladder groove, a pair of threaded ladder mount bolt holes, and a pair of threaded plate mounting holes. A ladder containment piece is coupled by a plurality of ladder mount bolts to the jack plate mount and forms a generally rectilinear ladder aperture there through the jack plate mount. A ladder has a central shaft and a pair of steps, the ladder being contained with the ladder aperture.

Abstract: An access ladder includes a plurality of sections connected together to telescope between an extended position and a retracted position that has an increasing reactive force to counterbalance the weight of the sections as they extend. A method for accessing a room with a ladder connected to a ceiling including the steps of moving the ladder to a fully extended position subject to an increasingly active force to counterbalance the weight of the ladder as it extends. There is the step of retracting the ladder into a retracted position in the ceiling.

Abstract: A staircase system (2) includes a rail element (40) and multiple stair elements (42). Baluster elements (44) are coupled to the rail element (40) and to the stair elements (42). A center support system (46) is coupled to and supports the rail element (40) and the stair elements (42). The center support system (46) has a stowed state and a deployed state.

Abstract: A ladder unit for climbing up and down a construction machine, capable of stabilizing a ladder in a position of descent thereof and that of storage thereof, facilitating an operator's actions to climb up and down the construction machine, and preventing the ladder from projecting toward circumferential parts and being thereby broken. Mechanisms for locking the ladder in the position of descent thereof are provided. The ladder locking force of these locking mechanisms is rendered releasable from the ladder in a position on the construction machine. Mechanisms for locking the ladder in its storage position are also provided.

Abstract: An escaping device includes a main frame including a pair of vertical rods adapted to be fixedly mounted on an inner side of a wall, a pair of supporting rods horizontally mounted on the main frame and having a track, a supporting bracket mounted on the main frame, and a cable fixing rod fixedly arranged on the vertical rods, a suspending rail vertically mounted on the main frame and having a top provided with a pulley, a retractable ladder having two sides provided with two axles slidably fitted into the track of the supporting rods, the retractable ladder having a plurality of transverse rods each provided with a sleeve, a cable controlling means fastened on the supporting bracket, and a cable having an end secured to the cable fixing rod and another end extending through a bottom of the ladder, the pulley and the sleeves to connect with the cable controlling means.

Abstract: A portable mini silo system for delivering dry mortar blends to batch mixers is disclosed. Such system includes a silo that is constructed for portable transport to a construction site, while providing support for the silo at the construction site, through the use of telescopic leg elements. The telescopic leg elements are suitably reinforced and mounted to the silo to provide both lateral offset and reinforcement. A collapsible ladder is attached to one of the telescopic leg elements for collapse and extension as one of the leg elements is collapsed and extended. The collapsible ladder, when extended at a construction site, enables a user to load dry mortar blends into the silo. A platform is also attached to the silo side wall and cooperates with the collapsible ladder to enable a user to climb the ladder and stand on the platform, thus facilitate loading and checking the contents of the silo.

Abstract: A boarding ladder assembly for mounting a boarding ladder on a support for movement between raised storage and lowered boarding positions. The assembly includes a guide structure that has first and second guide tracks mounted in spaced diverging angular orientation relative to each other and first and second guide track followers that are mounted therein for changing the angular orientation of the boarding ladder as it is raised and lowered. A counterweight has an actual weight greater than the weight of the ladder. A linkage is connected between the counterweight and ladder at a lift angle that varies as the ladder is raised and lowered to cause the counterweight to exert an actual lifting force that is sufficient to overcome the ladder weight when the ladder is in a raised position and that is less than the weight of the ladder when the ladder is in its lowered boarding position to automatically maintain the ladder in either position without the need for a latching mechanism.

Abstract: A movable type staircase is disclosed, particularly one which is located at the exterior wall or veranda at various floor levels of a building. In an emergency, a safety bar on any floor may be pushed aside to enable the movable staircase to unfold itself and connect rapidly by its own gravity with the veranda or fire exit at a lower floor level. Also by means of the force produced when the movable type staircase is being lowered, a safety bar at the next lower floor level will be further pushed aside to again enable that movable staircase to unfold itself and rapidly connect by its own gravity with still another lower floor level and so on until the various floor levels which are lower than the floor which the user is staying can be connected automatically in a way similar to an indoor staircase. It is a staircase which provides a highly safe and automatic means of escape for people in time of emergency.

Abstract: A ladder apparatus and method for use with large construction equipment, such as large tractors, mining trucks and similar vehicles that have an operator's platform or operating station located a substantial distance off the ground. The powered ladder has a fixed ladder portion rigidly attached to such a vehicle. The fixed ladder portion has spacedly attached thereto a frame element upon which a retractable ladder element is slidably disposed. The retractable ladder element is raised and lowered by an electric winch operable from the vehicle's operating station.

Abstract: Ladder assemblies are needed on large vehicles for an operator to ascend to the cab of a vehicle. The ladder assembly should be moveable between a lowered position for easy access and a raised position to prevent damage to the ladder when the vehicle is in use. The subject ladder assembly includes a pair of spaced rails mounted to the vehicle and an elongate ladder moveably positioned between the spaced rails. Cooperating means extend between the rails and the elongate ladder to position the ladder with respect to the rails and guide the ladder on the rails when the ladder is moved. The arrangement of components provides a simple and compact arrangement for raising and lowering the ladder.

Abstract: A ladder assembly for ease of access to a wharf or pier is disclosed. The ladder assembly includes a pair of vertical frame members having channels therein which are disposed about a ladder which is free to move upwardly and downwardly within the channels. The ladder may be secured to a cleat on the pier in a raised position when not in use. Upon releasing the ladder from the cleat, the ladder will move downwardly under its own weight so that its lower portion enters the water. A plate member attached to the top rung of the ladder will engage the deck surface of the pier in the lowermost position of the ladder.

Abstract: A fire escape ladder system for high-rise buildings having balconies with parapets. Each balcony stores its own corresponding ladders. A first ladder is securely mounted on the parapet. This ladder folds out and over the parapet when in use. A second ladder with a flanged top is pushed through a cooperating opening at the base of the parapet. The flange prevents the ladder from sliding through the opening. This second ladder descends to the top of the next lower balcony where it is secured with a bar and clamp assembly. Each user wears a safety belt that connects to T-shaped longitudinal slots integrally formed in both side pieces of the ladder. The ladder systems provide escape routes from balcony to balcony to ground.

Abstract: A rigid guide assembly having two inwardly disposed facing channel members secured to the stringer of a stationary platform and one end of a support member attached at each outward side of the top portion of the channel member. The other end of each support member is secured to the decking of the stationary platform. A vertical ladder secured to a floating base is disposed between the flanges of the two channel members thereby restricting the lateral movement of the ladder and float while allowing vertical movement as the water level changes.