Screw rod for pushing trolley

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing cost of a screw for carriage propulsion which is applicable to a carriage type conveying apparatus of a screw-drive system. SOLUTION: The screw for carriage propulsion comprises a driving shaft 1, a cylindrical screw body 2 externally fit onto the driving shaft 1 concentrically, and a connection means 3 integrating the driving shaft 1 with the cylindrical screw body 2. In the screw for carriage propulsion, each of the connection means 3 comprises rod-like bodies 8a, 8b radially penetrating through a band-like spiral plate 7 constituting the cylindrical screw body 2 at a plurality of parts in the axis direction of the cylindrical screw body 2, the inner ends 9 of the rod-like bodies 8a, 8b are welded to a peripheral face of the driving shaft 1, and the peripheral faces of the rod-like bodies 8a, 8b outwardly protruded from the band-like spiral plate 7 are welded to an outer face of the band-like spiral plate 7. COPYRIGHT: (C)2012,JPO&INPIT

Description

technical field [0001] The present invention relates to a trolley propulsion screw composed of a drive shaft, a cylindrical screw body concentrically fitted outside the drive shaft, and a connecting member integrating the drive shaft and the cylindrical screw body Background technique [0002] Such a trolley propulsion screw is described in Patent Document 1, and is a member for propelling various conveyance trolleys along a traveling path. The passive rollers provided on the transport trolley are fitted between the helical belt plates constituting the cylindrical screw body to rotate and drive the cylindrical screw body, thereby moving the transport trolley to the The trolley is propelled in the axial direction of the screw. As described in Patent Document 1, in the existing screw for propulsion of this trolley, the connecting member that integrates the drive shaft and the cylindrical screw body will be interposed by the helical belt plate that constitutes the cylindrical ...

AI Technical Summary

Problems solved by technology

[0004] In the framework of the prior art described in the above-mentioned Patent Document 1, it is not easy to arrange the fan-shaped plate material constituting the connecting member at a predetermined position inside the helical belt plate constituting the cylindrical screw body, and even if it is disposed at The inner periphery of the fan-shaped plate at a predetermined position on the inner side of the spiral strip plate is relatively easy to weld to the peripheral surface of the drive shaft, but it is still quite difficult to weld the outer periphery of the fan-shaped plate to the inner surface of the spiral strip plate, so more steps and time, resulting in higher cost

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