Reeling and unreeling device of wide-width coiled material

Abstract

The invention provides a reeling and unreeling device used for reeling and unreeling a coiled material in wide-width package printing equipment. The device comprises an air expansion shaft, a supporting mechanism, a machine frame and a driving mechanism, wherein the supporting mechanism is positioned at two ends of the air expansion shaft, the machine frame is used for fixing the supporting mechanism, the supporting mechanism comprises a bearing and a bearing support seat, the bearing support seat is provided with a U-shaped notch and fixedly arranged at the side wall of the machine frame, an outer ring of the bearing is fixedly arranged in the U-shaped notch of the bearing support seat, an inner ring of the bearing is sheathed onto a connecting shaft of the end surface of the air expansion shaft, and the air expansion shaft can be arranged in the U-shaped notch of the bearing support seat through a bearing frame and can also pass through the bearing to be connected with a driving mechanism for realizing the rotation. The reeling and unreeling device has the advantages that the change of the structures of the existing air expansion shaft and the machine frame is not needed, the function of carrying the air expansion shaft and the function of driving the air expansion shaft to rotate can be resolved only through improving the structure of the supporting mechanism, the construction on the existing wide-width coiled material reeling and unreeling device can be easily realized, and the advantages of simple structure and low cost are realized.

Description

technical field [0001] The present invention relates to a coil processing equipment, in particular to a device for rewinding and unwinding in the processing of wide-format coils, and more particularly to a device for processing coils in wide-format packaging and printing equipment. Winding and unwinding device for winding and unwinding. Background technique [0002] The device used for winding and unwinding the roll material in the existing packaging and printing equipment generally includes an air expansion shaft and supporting mechanisms located at both ends of the air expansion shaft and fixed on the frame, such as figure 1 As shown, the air expansion shaft is a cylinder with a connecting shaft extending from the center of both ends. The end of the connecting shaft is provided with a positioning end with a rectangular cross section. The supporting mechanism is a transmission with a clamping surface and located on the back of the clamping surface The chuck of the shaft ha...

AI Technical Summary

Problems solved by technology

In the processing of large-format coils, since the air shaft is relatively long and heavy, the chuck must not only bear the load of the air shaft, but also drive the air shaft to rotate, and in order to facilitate the loading and unloading of the air shaft, generally The cross section of the positioning end of the air shaft is designed to be smaller than the cross section of the chuck positioning groove. In this way, after working for a period of time, it is easy to loosen between the positioning end of the air shaft and the positioning groove of the chuck, resulting in the air shaft being in the middle of the chuck. Shaking phenomenon occurs when rotating, which will not only greatly affect the quality of unwinding and rewinding, but also in the continuous collision between the positioning end of the air expansion shaft and the positioning groove of the chuck, the air expansion shaft and the chuck will be seriously damaged, and its service life will be greatly reduced. shorten

In recent years, technical personnel in the field have continuously proposed improvements to address the above-mentioned defects, but most of these improvements involve changes to the structure of the air shaft; since the air shaft is a common Parts can only be effective if the relevant manufacturers change the structure of the air shaft at the same time, which involves a wide range of areas, so it is difficult to popularize and apply; in addition, because the air shaft is a relatively expensive part, if the existing air shaft cannot be modified Shaft to be used, will cause great waste

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