JPS5921153Y2 - Paper stacker device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper stacker device installed in a printing machine, etc., and particularly relates to a new paper stacker device with an improved vibrating roller section for folding perforated continuous paper in an orderly manner.

Printing paper used in printing machines that serve as output devices for computers and other devices generally has perforations at predetermined lengths, and the paper discharged from the printing machine follows these perforations before printing. It is folded by the restoring force that tries to return to the state.

However, in the case of a printing machine using an electrophotographic method, a method is used in which the developed print pattern is fixed by heating.

Therefore, as a result of the paper being heated to a high temperature during this fixing,
The folds along the perforations are stretched and the folded paper becomes weak, and if it is folded as is, the folds 2' will swell as the amount of paper 2 accumulated on the stacker table 1 increases, as shown in Figure 1. This causes folding defects in areas other than the perforations, which reduces the operator's work efficiency.

Therefore, in order to solve the bulging of the fold line 2', as shown in Fig. 2, impellers 3 and 3' are placed on both sides of the folded paper 2 and turned inward to form the fold line at the perforation. A folding method is adopted in which the blades are forcibly pressed by the impellers 3 and 3'.

However, with this method, when paper with different folding lengths is used depending on the business content, the interval between the impellers 3 and 3' must be adjusted each time, which not only complicates the operation but also reduces the number of parts. There was a drawback that the cost increased as the number increased.

The present invention was developed to solve the above-mentioned drawbacks, and the paper discharged from the printing machine is held between a vibrating roller and a diaphragm, and the printing paper is heated by simultaneously applying vertical and horizontal vibrations. A novel paper stacker device is proposed that facilitates cooling of paper and restoration of folds along perforations.

Embodiments of the paper stacker device according to the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a side view for explaining one embodiment of the present invention, and parts that are the same as those in the previous embodiment are denoted by the same reference numerals.

Reference numeral 4 denotes a drive shaft of an oblong vibrating roller 5; 6 a diaphragm made of an elastic material that faces the vibrating roller 5 and holds the paper 2; and 7 and 8 the printing paper 2 discharged from the printing machine 2.
81 are four parts provided on the guide plate 8 for escaping the vibrating roller 5.

In such a configuration, when the vibrating roller 5 made of an elastic material such as hard rubber is rotated by the drive shaft 4 in the direction of arrow A at a speed faster than the paper feed speed, the paper 2 discharged from the printing machine (not shown) is guided The gap between the plates 7 and 8 is regulated in the left-right direction, and the sheets are folded and stacked on the stacker table 1 while being subjected to vibration by the vibrating roller 5.

Now, if we consider the case where the diaphragm 6 is not attached, the paper 2 discharged from the printing machine will be pushed out as shown by the solid line A when the vibrating roller 5 is in the state B.
When the vibrating roller 5 rotates and reaches state C, it is natural that the paper 2 will be shaped like a two-dot chain line due to its own weight, but in reality, due to air resistance etc., it will become like a dotted line.
The vibration amplitude of the paper sheet due to the rotation of the vibrating roller 5 remains within the dimensional range.

However, due to this vibration, the speed at which the paper 2 comes into contact with the air is slow, so that heat dissipation during fixing is insufficient, and the paper 2 cannot be folded in an orderly manner as described above.

On the other hand, when a vibrating piece 6 made of an elastic material such as phosphor bronze is attached and the paper 2 is held between the vibrating rollers 5 and the periphery of the vibrating roller 5 by pressing lightly, the vibrating roller 5 moves the paper 2 to the state B. At some point, the paper is pushed out as shown by the solid line A, and the paper below is pulled up by the pushed out dimension.

When the vibrating roller reaches state C, the paper 2 is pushed by the diaphragm 6 as indicated by the chain double-dashed line and becomes almost vertical.
The lifted paper 2 returns to its original position and causes vertical vibration (■).

In this way, the paper 2 vibrates horizontally with an amplitude of H and longitudinally vibrates with an amplitude of ■ every time the vibrating roller 5 rotates, so that the paper 2 is exposed to air at a faster speed and the heat of the paper 2 can be easily dissipated. .

This condensed paper is cooled, increasing the strength of the paper, and the folds on the perforations that have been stretched by heating are
Since the recovery is caused by the longitudinal vibration (2) which is performed simultaneously with the amplitude H, it becomes possible to stack the sheets 2 on the stacker table 1 in an orderly manner.

In the above embodiments, the shape of the vibrating roller 5 is described in detail as an ellipse, but other rotationally asymmetric shapes that give vibration, such as an ellipse, may also be used, and the width direction of the vibrating roller 5 may also be It may be an integral shape with the same length as the paper width, or
It may be divided into multiple pieces.

Similarly, the diaphragm 6 may have a comb-like shape with a divided tip, or may have a single blade shape elongated in the width direction of the paper.

In some cases, it is also possible to replace the paper pressing function of the diaphragm with an air flow using a blower.

As is clear from the above explanation, according to the present invention, the paper discharged from the printing machine is held between the vibrating roller and the vibrating plate.
By simultaneously performing horizontal and vertical vibrations, it is possible to forcibly cool the paper and restore the creases at the perforations, which eliminates folding problems and is expected to provide a high-performance stacker device. It is extremely advantageous to attach it not only to thermal fixing type printing machines but also to various types of printing machines that use continuous paper.

[Brief explanation of drawings]

Figure 1 is a side view showing the conventional paper folding state;
The figure is a side view with an impeller that is forcibly folded.
FIG. 3 is a side view showing one embodiment of the paper stacker device according to the present invention. 1 stacker table, 2: paper, 3 and 3': impeller, 4: drive shaft, 5: vibrating roller, 6: diaphragm, 7 and 8 guide plates, 81 guide plate convex portion.

Claims (1)

[Scope of utility model registration request] In a paper stacker device that folds continuous paper discharged from a printing press main body while being vibrated by a vibrating roller, a diaphragm made of an elastic material is provided to face the vibrating roller and sandwich the paper, and the vibration of the paper is What is claimed is: 1. A paper stacker device, characterized in that the paper stacker is configured to follow a vibrating roller, and is provided with guide plates above and below a vibrating mechanism consisting of the vibrating roller and a diaphragm, respectively, for regulating the movement of the paper in the lateral direction.