SU1664583A1 - Method of transferring newspapers from printing press folder - Google Patents

Abstract

This invention relates to printing. The purpose of the invention is to provide high-quality newspapers. The invention makes it possible to increase the accuracy of the layout of the newspapers by smoothing out their speed in the receiving-output device. For this, the brake rollers rotate unevenly. Moreover, the maximum linear speed of their surface is equal to the speed of transportation of newspapers in the folding device, and the minimum speed corresponds to the speed of transportation of newspapers in the collector’s pockets. The synchronous rotation of the rollers is ensured by the presence of a gear connection between them by wheels, and the constants of the gaps in the gearing of these wheels during technological changeovers are articulated by a lever link. 2 Il.

Description

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The invention relates to printing machinery and can be used to improve the accuracy of the layout of newspapers.

The purpose of the invention is to provide high-quality newspapers.

FIG. 1 shows a diagram of an apparatus for carrying out a transportation method; Fig. 2 is a diagram of a change in the speed of a newspaper during its braking.

The method of transporting newspapers from the folding machine of the printing machine consists in taking the newspaper out of the folding machine, wiring the newspaper through its frictional contact with the braking elements and placing it in a pocket of the spreading device. Frictional contact of the brake elements with a newspaper is carried out along the entire length of the newspaper as it moves, and the linear velocity

braking elements at the time of the seizure of the newspaper's cross fold equal to the speed of its processing in the folding machine, and at the time the cross fold of the pocket bottom spreads, the linear velocity of the tail portion of the newspaper held by the brake elements smoothly

The mechanism for braking newspapers (Fig. 1) consists of two rollers 1 and 2 rotating with variable speed, one of them, for example 1, having a rigid surface, and the surface of the second roller 2 is made of an elastic material. The diameters of the rollers 1 and 2 are the same, and the gear ratio of the kinematic connection between them, realized in the form of gears 3-6, is equal to one

oh oh cl

00 WITH

A hinge-joint connection between the wheels ensures the stability of the side gaps in the gearing in case of a change in the distance between the working surfaces of the rollers 1 and 2 in the thickness of the newspaper 7, performed by the adjustment unit 8.

The rotational movement of the rollers 1 and 2 with variable speed can be provided by various mechanisms. As an example (fig; 1), a two-crank mechanism is shown. The drive crank 9 has a uniform rotation and the gears 10-14 are coupled with the folding cylinder 15.

The geometric synthesis of the four-level OiABCte is carried out on the basis of the required coefficient of braking of newspapers, which is a K / V2 ratio, where Vi (figure 2) is the speed at which a newspaper is transported in a folding device; V2 - the speed of movement of the fold of the newspaper in the collector's pocket. Since Vi о) ф and V2 RO Шв (Кф and RO are the radii of the folding cylinder and initial collector disk, respectively; Шф и are angular velocities), and the ratio u / w U depends on the construction of the cylinder group of the folding device and the number of feathers known value, the required drag coefficient depends on the geometry of these elements, i.e. TO

 R &.

Ro

U. The parameters of the two-crank

the hinge mechanism is easy to select using the machine builder reference book.

Other mechanisms, such as non-circular gears, can be used to drive variable speed rotating brake rollers.

The mechanism works as follows.

Newspaper 7 enters the contact zone of the brake rollers 1 and 2 (Fig. 1), moving at a maximum speed Vi (Fig. 2). At the time of the capture of the newspaper its speed is equal to the speed of the surface of the brake rollers. Then, as the speed of the surfaces of the rollers decreases, a smooth braking of the newspaper takes place and at a speed V2 equal to the speed of the bottom of the collector’s pocket, the newspaper

removed from the contact area of the rollers.

The effectiveness of the proposed method consists in smoothly braking newspapers before the contact of their fold with the bottom of the pocket of the collector and the elimination of this collision and subsequent deformation of the newspapers. Smooth braking of newspapers is a prerequisite for improving the accuracy of their vyklad, necessary to increase the operational speeds of newspapers.

Claims (1)

Invention Formula A method of transporting newspapers from the folding machine of the printing machine, consisting in taking the newspaper out of the folding machine. posting newspaper by its frictional contact with the brake elements and placing it in the pocket of the spreading device, characterized in that, in order to ensure high-quality output of newspapers, the frictional contact of the brake elements with the newspaper is carried out along the entire length of the newspaper as it moves; at the moment of capture of the transverse fold of the newspaper is equal to its speed 5 processing in the folding machine, and at the moment of contact with the transverse fold of the pocket bottom, the linear velocity of the tail of the newspaper, held by the brake elements, is equal to the bottom velocity 0 pockets of the spreading pocket, while damping the speed of the newspaper with the braking elements is carried out smoothly. eight Editor O.Hripta Compiled by N. Kalashnikova Tehred M.MorgentalKorrektor M.Kucher va W FIG. 2