JPH0419010Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a stacking device for folded paper in, for example, a Kanji printer.

[Conventional technology]

3, 4, and 5 are a plan view, a front view, and a right side view of the main parts of a conventional folding paper stacking device, respectively, and FIG. 6 is an A-- It is a sectional view taken along the A line. In each figure, 1 is a swing fin composed of two rectangular plates, 2 is a shaft with a rectangular cross section that supports the swing fin 1 (see Fig. 6), and a slit 3 is provided in the center of this shaft 2. A round bar 4 is welded to both ends, and the round bar 4 is supported by a bearing 5. 6 connects a pulley 7 attached to the shaft 2 and a pulley 9 attached to the tip of the rotating shaft of the reversible motor 8;
A timing belt 10 for transmitting torque is provided below the swing fin 1, and as shown in FIG. A pair of rollers 13 for feeding the folded paper 12 are guide plates for feeding the folded paper 12 fed by the respective rollers 11 and 14 into the slit 3 provided on the shaft 2.

7 to 9 are diagrams for explaining the swinging motion of the swing fin shown in FIG. 4, respectively;
FIG. 10 is a model of the stacking section using the swing fin shown in FIG. 4, and FIG.
FIG. 5 is a comparison diagram between the feed amount by the conventional swing fin shown in FIG. 4 and the feed amount determined geometrically.

Next, the operation of the above-described conventional stacking device for folded paper will be explained. Each roller 1
The folded paper 12 fed by the paper feeders 1 and 14 passes through the guide plate 13, further passes through the slit 3 of the shaft 2 and the swing fin 1, and is discharged to the paper tray 10 at a constant speed. During this time, swing fin 1
The reversible motor 8 swings between angles φ ₀ to −φ ₀ from the state shown in FIG. 7 to the state shown in FIG. 9 . When the swing fin 1 is at the angle φ ₀ as shown in FIG. 7, the perforation of the folded paper 12 is located at the right end in FIG. When fin 1 is at the angle −φ ₀ ,
The perforations of the folded paper 12 are located at the left end in FIG. That is, during a half cycle,
The length of the folding width (one sheet) of the folding paper 12 is folded as the swing fin 1 swings.

FIG. 10 shows a model of the stacking section formed by the swing fin 1. In the figure,
θ is the angle of the swing fin 1, φ ₀ is the maximum swing angle of the swing fin 1, η is the angle of the paper holder 10,
L is the folding width of the folded paper 12. here,
Assuming that η = 30°, φ ₀ = 35°, and L = 381 mm, the angle θ of the swing fin 1 and the folded paper 12 at that time are
The 11th plot shows the relationship between the feed rate and the feed amount.
It is represented by the dotted line shown in the figure. In addition, as shown by the dotted line in FIG. 10, the swing fin obtained when it is assumed that the folded paper 12 ejected without considering the deflection of the folded paper 12 is closely attached to the paper holder 10 and deforms linearly. This movement is called the geometrically determined movement of the swing fin, and the solid line shown in FIG. It is expressed as The geometric feed amount determined in this way is considered to approximate the optimal feed amount. In this way, it can be seen that the actual feed amount is always larger than the geometric feed amount. Therefore, when the angle θ of the swing fin 1 is around 0°, that is, when the swing fin 1 is located near the center of the paper tray 10, the folded paper 12 will sag in two slack states. The amount of slack will be approximately 141 mm.

[Problem that the invention attempts to solve]

Since the conventional folding paper stacking device described above is configured as described above, when the swing fin 1 is located near the center of the paper holder 10, the required feed amount of the folding paper 12 and the actual There is a large difference between the amount of feed and the amount of feed, and this causes problems such as the folded paper 12 sagging, buckling, or jamming.

This invention was made to solve these problems, and aims to provide a stacking device for folded sheets that can reduce the jam rate and stack at high speed.

[Means for solving problems]

The stacking device for folded paper according to this invention comprises two paper stackers supported by a shaft having a slit.
A motor capable of speed and position control is used as the drive system for swinging the swing fin, which is composed of a blind plate, and a control device is used to change the speed of the motor to multiple stages during a half cycle. The folded paper is folded and stored in the paper holder by causing the paper to perform a motion that approximates the optimal motion determined geometrically.

[Effect]

In the folding paper stacking device of this invention, the movement of the swing fin is controlled by a motor capable of speed and position control in the drive system of the swing fin. Since it is controlled to perform similar movements, it is possible to eliminate slack in the folded paper and reduce the jam rate.

〔Example〕

FIG. 1 is a right side view showing a stacking device for folded sheets which is an embodiment of the present invention. The same parts as in FIG. 5 are designated by the same reference numerals, and detailed explanation thereof will be omitted. In the figure, 15 is
This is a stepping motor used in place of the reversible motor 8 shown in FIG. 5, or an equivalent motor capable of speed and position control. 16
is a control device for the stepping motor 15.

FIG. 2 is a comparison diagram between the movement of the swing fin shown in FIG. 1 and the movement of the swing fin determined geometrically.

In the stacking device for folded paper, which is an embodiment of this invention and configured as described above, in order to cause the swing fin 1 to perform a swinging motion in a swinging manner close to a geometric waveform, the stepping - Control is performed by the control device 16 so that the speed of the motor 5 is switched between two stages during a half cycle. In other words, the movement of the swing fin 1 is
Control is performed so that the motion is as shown by the solid line in the figure. Here, the movement of the swing fin 1 shown by the dotted line in FIG. 2 represents the optimum movement determined geometrically.

In the above embodiment, a case has been described in which the control device 16 controls the speed of the stepping motor 15 in two stages, but the speed can be controlled in multiple stages. It's okay.

[Effect of idea]

As explained above, this invention uses a motor that can control speed and position as the drive system for swinging the swing fin in a stacking device for folded paper, and changes the speed of the motor in multiple stages during a half cycle. The structure is configured so that the swing fin performs a motion that approximates the optimal motion determined geometrically, so even when the swing fin reaches a position near the center of the paper holder, the folded paper This has excellent effects such as reducing the jam rate and greatly improving stacking performance.

[Brief explanation of the drawing]

Fig. 1 is a right side view showing a folding paper stacking device which is an embodiment of this invention, and Fig. 2 shows the movement of the swing fin shown in Fig. 1 and the geometrically determined movement of the swing fin. Comparison diagram of
FIG. 3, FIG. 4, and FIG. 5 are plan views showing a conventional folding paper stacking device, respectively;
A front view and a right side view of the main parts thereof, and FIG. 6 are cross-sectional views taken along the line A-A in FIG. 10 is a diagram for explaining the 4th
FIG. 11, which is a model of the stacking section using the swing fin shown in the figure, is a comparison diagram between the feed amount by the conventional swing fin shown in FIG. 4 and the feed amount determined geometrically. In the figure, 1...swing fin, 2...
Shaft, 3...slit, 4...round bar, 5...bearing,
6...Timing belt, 7.9...Pulley, 8
...Reversible motor, 10...Paper holder,
11, 14...Roller, 12...Folding paper,
13...Guide plate, 15...Stepping motor, 16...Control device. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] (1) A swing fin made up of two plates supported by a shaft with a slit, a drive system that swings the swing fin, and a pair of rollers that swing the swing fin at a constant speed. In the stacking device, the stacking device includes a paper holder for storing folded paper sent through the inside of the swing fin, and a motor capable of speed and position control;
Approximately to the movement of the swing fin obtained when it is assumed that the folded paper ejected without considering the deflection of the folded paper is linearly deformed by closely contacting the paper holder, the movement of the swing fin during a half period is A stacking device for folded paper, comprising: a control device that changes the speed of the motor in a plurality of steps so as to change the angular velocity of the swing fin in a plurality of steps. (2) The stacking device for folded paper according to claim 1, which uses a stepping motor as the motor and is equipped with a control device that changes the speed of the stepping motor in two stages. . (3) The stacking device for folded paper according to claim 1, wherein the control device controls the swing fin to perform a geometrically determined movement.