An article transport vehicle includes a travel body; a holding device that holds an article; and a lift device that is on the travel body, and that raises and lowers the holding device with respect to the travel body. The holding device includes: a connection portion connected to the lift device and an article support portion that supports the article; an elastic support mechanism that is between the article support portion and the connection portion, and that supports the article support portion against the connection portion while being elastic in a vertical direction, and a guide mechanism that guides the article support portion in the vertical direction with respect to the connection portion. The guide mechanism allows the article support portion to move parallel with the vertical direction with respect to the connection portion and restricts swinging of the article support portion with respect to the connection portion.

An article transport vehicle includes a travel body; a holding device that holds an article; and a lift device that is on the travel body, and that raises and lowers the holding device with respect to the travel body. The holding device includes: a connection portion connected to the lift device and an article support portion that supports the article; an elastic support mechanism that is between the article support portion and the connection portion, and that supports the article support portion against the connection portion while being elastic in a vertical direction, and a guide mechanism that guides the article support portion in the vertical direction with respect to the connection portion. The guide mechanism allows the article support portion to move parallel with the vertical direction with respect to the connection portion and restricts swinging of the article support portion with respect to the connection portion.

It is described an assembly for lifting pre-stressing cables for a pre-stressed concrete structure having ducts for pre-stressing cables, to be arranged on top of the concrete structure, comprising: (a) a rail 22 on which a hoist or pulley 30 is arranged, which has wheels, which allow hoist 30 to move along the rail 22; (b) a supporting structure 12, attached to rail 22; (c) a plurality of columns 14, which supports the supporting structure 12 of the rail 22, arranged at a certain distance from the rail; and (d) an hoists 30 having a chain 34 which is inserted into the vertical ducts 52 for the pre-stressing cables of the concrete structure, and uploads the wires to the top of the structure.

It is described an assembly for lifting pre-stressing cables for a pre-stressed concrete structure having ducts for pre-stressing cables, to be arranged on top of the concrete structure, comprising: (a) a rail 22 on which a hoist or pulley 30 is arranged, which has wheels, which allow hoist 30 to move along the rail 22; (b) a supporting structure 12, attached to rail 22; (c) a plurality of columns 14, which supports the supporting structure 12 of the rail 22, arranged at a certain distance from the rail; and (d) an hoists 30 having a chain 34 which is inserted into the vertical ducts 52 for the pre-stressing cables of the concrete structure, and uploads the wires to the top of the structure.

An overload brake and method for trolley suspended on a flange of a load traveling apparatus girder prevents the displacement movement of a suspended load along a girder by clamping a brake between two symmetrical flange tabs of the girder. The girder is elastically deformed by the load which is applied to the girder by the contact between a surface of the girder and translation wheels that move the load along the girder. Upon sufficient elastic deformation, portions of the girder contact a brake to prevent movement of the load along the girder.

A hook block suspended by a wire rope and provided with: sheave shaft parts for rotatably supporting hook sheaves; a connecting shaft inserted into shaft holes that penetrate the sheave shaft parts in the axial direction; brackets which support the sheave shaft parts by fitting the same in engaging holes in first piece parts, which are provided with second piece parts substantially orthogonal to the first piece parts, and in which insertion holes are formed, the insertion holes enabling the insertion of the upper side of a hook in a mutually facing arrangement; a bracket-fixing member supported by the second piece parts above the second piece parts; and a hook support member rotatably arranged above the bracket-fixing member and fixed to the outer periphery of the upper side of the hook.

A high-precision positioning system for a monorail hoist in a mine includes two gear carriers symmetrically arranged on both sides of an I-beam track. Each of the gear carriers includes a positioning wheel and a plurality of travelling wheels. The travelling wheels are travelling on an upper end face of a bottom plate of the I-beam track, and the positioning wheel is in engagement transmission with a rack at a lower end of the bottom plate of the I-beam track. The gear carriers include an installation bracket and a connecting seat configured to connect the monorail hoist. The installation bracket includes an inertial measuring unit and a single-chip microcomputer that are electrically connected with each other. The positioning wheel includes a rotation angle sensor and the rotation angle sensor is electrically connected to the single-chip microcomputer. A headstock at both ends of the monorail hoist includes a coordinate updating unit.

A high-precision positioning system for a monorail hoist in a mine includes two gear carriers symmetrically arranged on both sides of an I-beam track. Each of the gear carriers includes a positioning wheel and a plurality of travelling wheels. The travelling wheels are travelling on an upper end face of a bottom plate of the I-beam track, and the positioning wheel is in engagement transmission with a rack at a lower end of the bottom plate of the I-beam track. The gear carriers include an installation bracket and a connecting seat configured to connect the monorail hoist. The installation bracket includes an inertial measuring unit and a single-chip microcomputer that are electrically connected with each other. The positioning wheel includes a rotation angle sensor and the rotation angle sensor is electrically connected to the single-chip microcomputer. A headstock at both ends of the monorail hoist includes a coordinate updating unit.

It is described an assembly for lifting pre-stressing cables for a pre-stressed concrete structure having ducts for pre-stressing cables, to be arranged on top of the concrete structure, comprising: (a) a rail 22 on which a hoist or pulley 30 is arranged, which has wheels, which allow hoist 30 to move along the rail 22; (b) a supporting structure 12, attached to rail 22; (c) a plurality of columns 14, which supports the supporting structure 12 of the rail 22, arranged at a certain distance from the rail; and (d) an hoists 30 having a chain 34 which is inserted into the vertical ducts 52 for the pre-stressing cables of the concrete structure, and uploads the wires to the top of the structure.

A drilling rig transfer system includes a mobile transfer beam, a trolley assembly operatively attached to and moveable along the mobile transfer beam, and a connection mechanism suspended from the trolley assembly for connecting to and lifting a device. The mobile transfer beam is suspended from first and second traveling blocks through connections at first and second suspension positions along the mobile transfer beam. A method of transferring a device may include suspending a connection mechanism from the trolley assembly over a first location, lowering and attaching the connection mechanism to a device disposed at the first location, lifting the device with the connection mechanism, moving the trolley assembly along the mobile transfer beam to position the connection mechanism and the device over a second location, and lowering the connection mechanism and the device into the second location.