Elastic piece transposition device

Abstract

The invention provides an elastic piece transposition device. The elastic piece transposition device comprises a machine frame, a rotary shaft, a transposition device, a drive device and a negative pressure system, wherein the rotary shaft, the transposition device, the drive device and the negative pressure system are installed on the machine frame. The drive device is installed on the machine frame, the rotary shaft is rotationally installed on the machine frame, one end of the rotary shaft is in transmission connection with the output end of the drive device, the transposition device is installed on the rotary shaft, and the negative pressure system is installed on the transposition device and used for adsorbing or releasing transferred objects. Plural base plates and adsorption plates are installed on the transposition device, wherein each adsorption plate is installed on each base plate, each base plate is rotationally installed on the rotary shaft, and a differential gear is installed between each base plate and the rotary shaft. Each differential gear comprises an eccentric disc, a connection rod and a swing arm, wherein each eccentric disc is fixedly installed on the machine frame, one axial side of each eccentric disc is provided with an eccentric guide groove which is closed along the circumferential direction, the middle portion of each connection rod is rotationally installed on the radial outer side of the rotary shaft, one end of each connection rod is installed inside each guide groove in a sliding mode, the other end of each connection rod is installed at one end of each swing arm in a pivoted mode, and the other end of each swing arm is installed on each base plate in a pivoted mode.

Description

technical field [0001] The invention relates to an elastic sheet indexing device, which is used to release an elastic sheet after rotating 90 degrees along its plane. The device is applied to a diaper production line as a waist elastic belt adding device. Background technique [0002] refer to Figure 7 , the known disposable diapers include a liquid-permeable top layer, a liquid-impermeable bottom layer and an absorbent core 1' between the top layer and the bottom layer. The disposable diapers also include a front waist sticker 2' and a left and right waist sticker 3', After the diaper is worn in the body compartment, the diaper is kept in the wearing state by the mutual adhesion of the left and right waist stickers 3' and the front waist sticker 2'. Usually, the waist part of the diaper is also provided with a laterally extending waist elastic band 4'. Definition The diaper has a longitudinal direction extending from the front waist region to the rear waist region, and the...

AI Technical Summary

Problems solved by technology

Specifically, there are two ways to add the waist elastic band 4': one is that the continuous sheet has elasticity in the transverse direction, and the elastic sheet is cut and then stretched transversely and then composited to other sheets of the diaper in a stretched state In general, this method of adding elastic sheets requires a clamping part that is stretched horizontally, so its effective stretching part is narrow, and it cannot really achieve the wearing effect of elastic shrinkage; the other is that the continuous sheet is elastic in the longitudinal direction, The elastic sheet is stretched longitudinally after being cut, then the stretched sheet is rotated 90 degrees to become horizontal, and then attached to other sheets of diapers; this method still has an effective elastic part in the cutting After being released and the large elastic contraction in the process of repositioning, it is manifested in that after the waist elastic band 4' is added to the diaper, the elasticity of the diaper's waist direction does not change much. The main reason is that the elasticity of the elastic sheet is fixed to Diapers have been partially released before

[0003] The Chinese patent ZL200920136942.7 filed by the applicant of the present invention on February 27, 2009 discloses an indexing wheel device for sanitary napkin production, which discloses a structure for changing sanitary napkins from vertical to horizontal, which constitutes the structure of the present invention. Background technology, but this technical solution does not have the function of angular velocity differential rotation of the adsorption disc during the revolution process. This structure is possible as the indexing of the final product, but the speed of the elastic sheet must match the speed of the production line after indexing is not applicable

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