There is provided a method of installing spiral hangers about a messenger line installed between first and second utility poles with a cable being lashed to the messenger line with a lashing wire. The method includes attaching a first and second spiral hangers to the messenger line between first and second utility poles with the first spiral hanger disposed about the messenger line and the cable. The method includes removing the lashing wire from being around the messenger line and the cable adjacent the second spiral hanger. The method includes moving the second spiral hanger towards the second utility pole. The method includes attaching a successive spiral hanger to the messenger line between the spiral hangers and repeating the moving of the second spiral hanger and attaching another successive spiral hanger.

An upgraded quay crane system and an operation process, wherein a conventional quay crane girder is upgraded into a double-trapezoid four-track girder (1). An upper trolley (2) travels on upper trolley running tracks (a16) on an inner side of the double-trapezoid four-track girder (1), a lower trolley (3) is suspended upside down on lower trolley running tracks (a8) on an outer side of the double-trapezoid four-track girder (1), and a container (5) hoisted by the upper trolley (2) via a hoist (4) is able to pass through the lower trolley (3). The present quay crane system improves on the conventional quay crane having a single operation trolley by adding one more operation trolley on the outer side of the original quay crane girder. The two trolleys are vertically disposed, and the space structure for the lower trolley is cleverly designed, such that the two trolleys can operate independently without interfering with each other. The two trolleys of the upgraded quay crane have enough space to pass by each other and operate at the same time, thereby doubling loading and unloading efficiency.

An upgraded quay crane system and an operation process, wherein a conventional quay crane girder is upgraded into a double-trapezoid four-track girder (1). An upper trolley (2) travels on upper trolley running tracks (a16) on an inner side of the double-trapezoid four-track girder (1), a lower trolley (3) is suspended upside down on lower trolley running tracks (a8) on an outer side of the double-trapezoid four-track girder (1), and a container (5) hoisted by the upper trolley (2) via a hoist (4) is able to pass through the lower trolley (3). The present quay crane system improves on the conventional quay crane having a single operation trolley by adding one more operation trolley on the outer side of the original quay crane girder. The two trolleys are vertically disposed, and the space structure for the lower trolley is cleverly designed, such that the two trolleys can operate independently without interfering with each other. The two trolleys of the upgraded quay crane have enough space to pass by each other and operate at the same time, thereby doubling loading and unloading efficiency.

A ceiling conveyance vehicle includes a traveling wheel to roll on a track including a first track and a second track and a main body below the track and coupled to the traveling wheel. The ceiling conveyance vehicle includes a direction changer to change between a first state in which the traveling wheel rolls on the first track and a second state in which the traveling wheel rolls on the second track, with an orientation of the main body with respect to the track maintained, an article holder capable of holding an article, a hoisting-and-lowering driver to hoist and lower the article holder, a lateral slider to slidingly move the hoisting-and-lowering driver in a horizontal, linear direction, and a first rotational driver to rotationally drive the lateral slider around a first perpendicular axis with respect to the main body.

A ceiling conveyance vehicle includes a traveling wheel to roll on a track including a first track and a second track and a main body below the track and coupled to the traveling wheel. The ceiling conveyance vehicle includes a direction changer to change between a first state in which the traveling wheel rolls on the first track and a second state in which the traveling wheel rolls on the second track, with an orientation of the main body with respect to the track maintained, an article holder capable of holding an article, a hoisting-and-lowering driver to hoist and lower the article holder, a lateral slider to slidingly move the hoisting-and-lowering driver in a horizontal, linear direction, and a first rotational driver to rotationally drive the lateral slider around a first perpendicular axis with respect to the main body.

An overhead rail system includes a hollow tube having a channel running longitudinally along a bottom surface of the overhead rail. A stopper for use in the overhead rail, includes a base having a thickness less than a width of the channel of the overhead rail, a base length, a base width, and first and second countersunk threaded holes. The base further includes a pair of wings having a length greater than a width. The wings are rotatably attached to ends of the base and are rotatable approximately 90 degrees between a first position and a second position. Bolts may attach a stopper portion including a stopper base, and bumper base, and a bumper. The bolts further prevent rotation of the wings, thus securing the stopper in the overhead rail.

An overhead rail system includes a hollow tube having a channel running longitudinally along a bottom surface of the overhead rail. A stopper for use in the overhead rail, includes a base having a thickness less than a width of the channel of the overhead rail, a base length, a base width, and first and second countersunk threaded holes. The base further includes a pair of wings having a length greater than a width. The wings are rotatably attached to ends of the base and are rotatable approximately 90 degrees between a first position and a second position. Bolts may attach a stopper portion including a stopper base, and bumper base, and a bumper. The bolts further prevent rotation of the wings, thus securing the stopper in the overhead rail.

A produce loading and unloading device and system. The device and system has structures for lifting an entire stack of flats loaded with produce such as berries, moving the stack of flats to a conveyor, and dumping the produce off each flat of the stack, one flat at a time. During the process, the operator of the device doesn't have to lift a single flat of produce. The dumping operation operates continuously, with no pauses to load stacks of flats. Throughput and safety are greatly improved.

A produce loading and unloading device and system. The device and system has structures for lifting an entire stack of flats loaded with produce such as berries, moving the stack of flats to a conveyor, and dumping the produce off each flat of the stack, one flat at a time. During the process, the operator of the device doesn't have to lift a single flat of produce. The dumping operation operates continuously, with no pauses to load stacks of flats. Throughput and safety are greatly improved.

There is provided a method of installing spiral hangers about a messenger line installed between first and second utility poles with a cable being lashed to the messenger line with a lashing wire. The method includes attaching a first and second spiral hangers to the messenger line between first and second utility poles with the first spiral hanger disposed about the messenger line and the cable. The method includes removing the lashing wire from being around the messenger line and the cable adjacent the second spiral hanger. The method includes moving the second spiral hanger towards the second utility pole. The method includes attaching a successive spiral hanger to the messenger line between the spiral hangers and repeating the moving of the second spiral hanger and attaching another successive spiral hanger.