A paper bag opening mechanism

Abstract

The invention relates to the technical field of paper bag bottom pasting machines, in particular to a paper bag expanding mechanism. The paper bag expanding mechanism comprises a frame, and a box mounted on the frame; a main gear is mounted in the box; and a bag expanding module is embedded in the main gear. The paper bag expanding mechanism further comprises a delay mechanism, and an external driving shaft; a gear set is arranged between the delay mechanism and the main gear; the delay mechanism comprises a swing arm; a positioning shaft is embedded in the end part of the swing arm; a first delay gear and a slide rod are fixed at two ends of the positioning shaft; a rotating shaft is inserted in the slide rod; the rotating shaft is rotationally connected with the slide rod; a second delaygear relatively rotated sleeves the driving shaft; and the second delay gear is in engaged connection to the first delay gear, and drives the gear set to synchronously rotate. The paper bag expandingmechanism is provided with the delay mechanism for maintaining the opening expanding gesture of paper bags, so that the openings of the paper bags are not easy to drop down when the paper bags are fed in a subsequent indentation roller set, and the possibility of generation of wrong indentation positions is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of a paper bag bottom gluer, in particular to a paper bag opening mechanism. Background technique [0002] At present, the production process of most domestic paper bag automatic bottom paste machines is to cut out the unsealed paper bag first, then insert the opening mechanism into the paper bag mouth to unfold the two sides of the paper bag mouth, and finally paste the bottom of the unfolded paper bag. [0003] The above-mentioned existing technical solutions have the following defects: since the paper bags are continuously advancing on the automatic bottom gluer, there must be a sequence in the opening of the end openings of the paper bags in the feeding direction. If the right side of the opening of the same paper bag is opened first, and the left side of the opening of the paper bag has not entered into the opening action in a short time, but the pipe inserted into the right side of the opening of the p...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned existing technical solutions have the following defects: since the paper bag is continuously advancing on the automatic bottom gluer, the opening of the end opening of the paper bag in the feeding direction will definitely have a sequence

If the right side of the opening of the same paper bag is opened first, and the left side of the opening of the paper bag has not entered into the opening action in a short time, but the pipe inserted into the right side of the opening of the paper bag has already begun to leave the paper bag, then it is very easy. It is easy to cause the right side of the paper bag to sag, making the indentation position of the subsequent processing wrong

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