A roller assembly having a central axis can comprise a roller having an outer surface and defining an inner bore. The apparatus can further comprise a bushing comprising a sleeve having an outer surface and defining an inner bore. The inner bore of the sleeve can have an operative circumference. The sleeve comprises a bladder that is configured to expand radially upon receipt of a fluid to reduce the operative circumference of the inner bore. The bushing can further comprise a flange extending radially outwardly from the sleeve. The flange defines a vessel containing fluid therein. The vessel is in fluid communication with the bladder of the sleeve. The bushing comprises an actuator that is configured to cause the fluid from the vessel of the flange to flow into the bladder of the sleeve. An alignment feature can be configured to rotationally position the roller relative to the bushing.

A roller assembly having a central axis can comprise a roller having an outer surface and defining an inner bore. The apparatus can further comprise a bushing comprising a sleeve having an outer surface and defining an inner bore. The inner bore of the sleeve can have an operative circumference. The sleeve comprises a bladder that is configured to expand radially upon receipt of a fluid to reduce the operative circumference of the inner bore. The bushing can further comprise a flange extending radially outwardly from the sleeve. The flange defines a vessel containing fluid therein. The vessel is in fluid communication with the bladder of the sleeve. The bushing comprises an actuator that is configured to cause the fluid from the vessel of the flange to flow into the bladder of the sleeve. An alignment feature can be configured to rotationally position the roller relative to the bushing.

The invention concerns a capstan reel (10) and a method for transporting an elongated article (6, 6a, 6b, 39, 42, 43, 45a, 47) between a floating vessel (2) and a body of water situated below the vessel, and a vessel applying such a capstan reel. The capstan reel comprises a rotatable cylindrical body (100) for spooling the elongated article around the body's axial axis (11), said body comprising a cylindrical contacting surface (35) for indirectly supporting at least a portion of the elongated article. Furthermore, the capstan reel comprises an endless chain (18) spooled at least partly around the cylindrical body in a helical direction relative to the axial axis of the body, acting as an intermediate layer between the cylindrical contacting surface and the intended elongated article, and a chain transfer guide (17) extending across the axial length of the cylindrical body for guiding the endless chain between a chain exit region (T) in a first axial end region (7a) of the cylindrical body and a chain entry region (E) in a second axial end region (7b), the second axial end region being situated at the opposite axial end of the cylindrical body.

The invention concerns a capstan reel (10) and a method for transporting an elongated article (6, 6a, 6b, 39, 42, 43, 45a, 47) between a floating vessel (2) and a body of water situated below the vessel, and a vessel applying such a capstan reel. The capstan reel comprises a rotatable cylindrical body (100) for spooling the elongated article around the body's axial axis (11), said body comprising a cylindrical contacting surface (35) for indirectly supporting at least a portion of the elongated article. Furthermore, the capstan reel comprises an endless chain (18) spooled at least partly around the cylindrical body in a helical direction relative to the axial axis of the body, acting as an intermediate layer between the cylindrical contacting surface and the intended elongated article, and a chain transfer guide (17) extending across the axial length of the cylindrical body for guiding the endless chain between a chain exit region (T) in a first axial end region (7a) of the cylindrical body and a chain entry region (E) in a second axial end region (7b), the second axial end region being situated at the opposite axial end of the cylindrical body.

A 3D printing filament feeding apparatus for feeding a filament (10) includes a primary driving wheel (100), a secondary driven wheel (300), a measurement scale rotating disk (400), an optical sensor (500) and a cleaning assembly (600). The primary driving wheel (100) is connected to a power source (200) and driven thereby to rotate. The secondary driven wheel (300) is arranged adjacent to and parallel with the primary driving wheel (100). The measurement scale rotating disk (400) includes scale structures (410) and rotates together with the secondary driven wheel (300). The optical sensor (500) detects the scale structures (410). The cleaning assembly (600) engages with the scale structures (410); wherein the secondary driven wheel (300) engages with the filament (10) and rotates along a driven direction (D) together therewith such that the scale structures (410) passes through the cleaning assembly (600), followed by detection of the optical sensor (500).

A 3D printing filament feeding apparatus for feeding a filament (10) includes a primary driving wheel (100), a secondary driven wheel (300), a measurement scale rotating disk (400), an optical sensor (500) and a cleaning assembly (600). The primary driving wheel (100) is connected to a power source (200) and driven thereby to rotate. The secondary driven wheel (300) is arranged adjacent to and parallel with the primary driving wheel (100). The measurement scale rotating disk (400) includes scale structures (410) and rotates together with the secondary driven wheel (300). The optical sensor (500) detects the scale structures (410). The cleaning assembly (600) engages with the scale structures (410); wherein the secondary driven wheel (300) engages with the filament (10) and rotates along a driven direction (D) together therewith such that the scale structures (410) passes through the cleaning assembly (600), followed by detection of the optical sensor (500).

A system for adjusting a path of a wire includes a precast pulley assembly having at least one precast pulley having at least first and second positions. The at least one precast pulley may be adjustable from the first position to the second position without a user touching the at least one precast pulley. A path of a wire is adjusted when disposed around the at least one precast pulley when it is in the second position instead of in the first position. In one embodiment, the precast pulley assembly includes first and second precast pulleys disposed in an adjacent relationship with respect to one another, wherein a wire can selectively pass over one or both of the first and second precast pulleys.

A system for adjusting a path of a wire includes a precast pulley assembly having at least one precast pulley having at least first and second positions. The at least one precast pulley may be adjustable from the first position to the second position without a user touching the at least one precast pulley. A path of a wire is adjusted when disposed around the at least one precast pulley when it is in the second position instead of in the first position. In one embodiment, the precast pulley assembly includes first and second precast pulleys disposed in an adjacent relationship with respect to one another, wherein a wire can selectively pass over one or both of the first and second precast pulleys.

It is intended to provide a cable pulling machine that can avoid, even when installed at a high place, a stop of pulling and a cable installation method. A cable pulling machine according to the present invention includes two roller portions c having outer peripheries between which a cable a is to be held and a guide f that introduces the cable a between the roller portions c. The guide f adjusts an angle θ formed between a straight line connecting respective centers o of the roller portions c and the cable a introduced between the roller portions c to a value of not less than 45° and not more than 90°.

It is intended to provide a cable pulling machine that can avoid, even when installed at a high place, a stop of pulling and a cable installation method. A cable pulling machine according to the present invention includes two roller portions c having outer peripheries between which a cable a is to be held and a guide f that introduces the cable a between the roller portions c. The guide f adjusts an angle θ formed between a straight line connecting respective centers o of the roller portions c and the cable a introduced between the roller portions c to a value of not less than 45° and not more than 90°.