A device that pulls out an optical fiber includes: a bobbin support that supports a bobbin rotatably about a rotation axis; a first pulling out unit that holds a first end of the optical fiber, pulls out a first portion of the optical fiber wound around the bobbin from a side of the first end in a state where the bobbin rotates in a predetermined direction, and returns a part of the first portion to the bobbin in a state where the bobbin rotates in a direction opposite to the predetermined direction; and a second pulling out unit that holds a second end of the optical fiber after the first pulling out unit pulls out the first portion from the side of the first end, and pulls out a second portion of the optical fiber wound around the bobbin from a side of the second end.

A 3D printing apparatus includes a consumable spool for winding a consumable. A consumable rewinding device includes: a driving assembly including a driving portion and a rotating shaft, the driving portion being connected to the rotating shaft for providing power to drive the rotating shaft to rotate; and a roller for bearing a consumable spool, the rotating shaft is connected to the roller, and when the rotating shaft drives the roller to rotate, the consumable spool is driven to rotate by a frictional force between the roller and the consumable spool. The 3D printing apparatus and the consumable rewinding device enable the consumable to be rewound around the consumable spool, avoiding the problem of printer jamming due to messy distribution of the consumable, have a simple structure, and is easy to implement.

A 3D printing apparatus includes a consumable spool for winding a consumable. A consumable rewinding device includes: a driving assembly including a driving portion and a rotating shaft, the driving portion being connected to the rotating shaft for providing power to drive the rotating shaft to rotate; and a roller for bearing a consumable spool, the rotating shaft is connected to the roller, and when the rotating shaft drives the roller to rotate, the consumable spool is driven to rotate by a frictional force between the roller and the consumable spool. The 3D printing apparatus and the consumable rewinding device enable the consumable to be rewound around the consumable spool, avoiding the problem of printer jamming due to messy distribution of the consumable, have a simple structure, and is easy to implement.

A system for braking rotational movement of at least one beam is disclosed. The system can comprise a frame and at least one beam rotatably supported on the frame. Each beam of the at least one beam can comprise at least one sheave groove on at least one longitudinal end. A rope can have a first end and a second end. Each of the first end and second end can be fixedly coupled to the frame. The rope can be received within a portion of at least one of the at least one sheave groove of each beam. A tensioning assembly can be configured to selectively cause a predetermined braking tension in the rope.

A system for braking rotational movement of at least one beam is disclosed. The system can comprise a frame and at least one beam rotatably supported on the frame. Each beam of the at least one beam can comprise at least one sheave groove on at least one longitudinal end. A rope can have a first end and a second end. Each of the first end and second end can be fixedly coupled to the frame. The rope can be received within a portion of at least one of the at least one sheave groove of each beam. A tensioning assembly can be configured to selectively cause a predetermined braking tension in the rope.

A large diameter lay-flat hose spool apparatus has a mobile platform with a chassis and wheels. Side supports extend up from the chassis. An axle bears on the side supports, spanning a gap therebetween. Plural spools are rotatably mounted on the axle. Each spool has at least one rim and a length of lay-flat hose wound thereon. A driver rotates the individual spools about the axle independently of the other spools. The driver has a first actuator that moves a drive wheel into and out of contact with a rim of one of the spools. The driver has a second actuator that moves the drive wheel from one of the spool rims to another of the spool rims. A motor rotates the drive wheel. A controller system operated the motor, the first actuator and the second actuator.

A large diameter lay-flat hose spool apparatus has a mobile platform with a chassis and wheels. Side supports extend up from the chassis. An axle bears on the side supports, spanning a gap therebetween. Plural spools are rotatably mounted on the axle. Each spool has at least one rim and a length of lay-flat hose wound thereon. A driver rotates the individual spools about the axle independently of the other spools. The driver has a first actuator that moves a drive wheel into and out of contact with a rim of one of the spools. The driver has a second actuator that moves the drive wheel from one of the spool rims to another of the spool rims. A motor rotates the drive wheel. A controller system operated the motor, the first actuator and the second actuator.

Apparatus for lifting and supporting an item above a floor includes a frame and a pair of upright telescoping post assemblies having two opposite ends and which are positionable on opposite sides of the item to be lifted. A pair of guide posts are arranged as to extend substantially vertically of the frame and adjacent the post assemblies. A carriage assembly having an elongated member is mounted upon each post assembly for cooperating between the item and an adjacent guide post, and jacks are utilized for moving the ends of the post assemblies apart so that by positioning the elongated members of the carriage assemblies in cooperating relationship with an end of the item and moving the ends of the post assemblies apart, the end of the item is lifted by a corresponding amount and the carriage assemblies are guided along the guide posts.

Apparatus for lifting and supporting an item above a floor includes a frame and a pair of upright telescoping post assemblies having two opposite ends and which are positionable on opposite sides of the item to be lifted. A pair of guide posts are arranged as to extend substantially vertically of the frame and adjacent the post assemblies. A carriage assembly having an elongated member is mounted upon each post assembly for cooperating between the item and an adjacent guide post, and jacks are utilized for moving the ends of the post assemblies apart so that by positioning the elongated members of the carriage assemblies in cooperating relationship with an end of the item and moving the ends of the post assemblies apart, the end of the item is lifted by a corresponding amount and the carriage assemblies are guided along the guide posts.

A spool holder includes a cylinder defining a longitudinal axis and having an external surface on which a spool of wire may be supported. A first plate is positioned at a first end of the cylinder and a second plate is positioned at a second end of the cylinder. Both first and second plates have portions extending radially outward from the external surface of the cylinder. The first and second plates both have a perpendicular orientation relative to the longitudinal axis. The first and second plates restrict axial movement of the spool of wire therebetween. The first plate and cylinder are stationary relative to a mounting structure, while the second plate is configured to rotate with the spool of wire. A mechanism urges the second plate and, thus, the spool of wire toward the first plate, thereby regulating rotation of the spool of wire.