JPS61282262A - Paper folding apparatus - Google Patents

Abstract

PURPOSE:To easily use papers in a variety of length by easily varying the swing angle of a fin by moving the fin in reciprocation by the normal and reverse revolution of a reversing motor. CONSTITUTION:A pulley 38 is revolution-driven by a reversing motor 30 through a reduction gear 32, pulley 34 and a belt 36. When the reversing motor 30 is revolved normally and reversely, a fin 24 swings in reciprocation around a shaft 23, namely the center of revolution of a coupling 22. Since the swing angle of the fin 24 is varied by varying the revolution quantity, namely the driving time of the reversing motor 30, papers in a variety of length can be used. Therefore, the papers any length can be certainly folded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper folding device that uses swing fins (hereinafter referred to as fins) to fold a paper sheet alternately from front to back.

[Background of the Invention] An example of the paper folding device shown in FIG. 3 is shown. A paper 1 printed and discharged from a printing device (not shown) is pulled by a feed roller 2 and sent into a fin 4. The fins 4 swing back and forth once every two pages of the paper 1 to fold the paper 1 alternately from front to back. The folded sheets 1 are stacked on a table 6, and the folds are held down by a rotating paddle 5.

The fin 4 and its driving device are shown in FIG.

The fin 4 consists of a pair of plates separated into a plurality of strips on the lower side, and its upper end is attached to each shaft 3 rotatably supported by the seven frames 7.

One end of the shaft 3 projects to the side of the frame 7, and the projecting end is connected by a link 15 via a holder 14. Therefore, the pair of fins 4 reciprocate as a unit.

The rotation of the roller 8, which rotates continuously in one direction, is transmitted to a pulley 11 via a pulley 9 and a belt 10. Link 12 with one end attached to an eccentric pin provided on pulley 11
The other end is attached to a connector 13 provided on one side of the shaft 3 so as to extend downward. Therefore, the rotational motion of the motor 8 is converted into reciprocating motion by the pulley 11, link 12, and connector 13, and is transmitted to the fins 4.

According to the above configuration, the swing angle of the fin 4 is determined by the distance between the center of the pulley 11 and the eccentric pin, and the swing angle cannot be changed unless the pulley 11 etc. are replaced.

However, as is well known, printing devices use 1) sheets of different lengths, and the swing angle can be easily changed in accordance with the length of the sheets used; Therefore, depending on the paper used, it may not be possible to fold it reliably. Furthermore, since rotary motion is converted into reciprocating motion using a link mechanism or the like, there is a drawback that the structure becomes complicated. Furthermore, when the motor 8 starts rotating, the amount of swing of the fin 4 relative to the rotation angle of the motor 8 changes depending on the stop position of the eccentric pin, and as a result, the load on the motor 8 changes. Another drawback was that it required a large capacity motor.

[Object of the Invention] An object of the present invention is to provide a paper folding device that eliminates the above-mentioned drawbacks of the prior art, can easily accommodate sheets of various lengths, and has a simple configuration.

[Summary of the Invention 1] The present invention focuses on the fact that reciprocating motion can be easily obtained by normal rotation of the motor, and that the swing angle can be changed by changing the amount of rotation of the motor.
It is devised so that the reciprocating swing of the fins is performed by forward and reverse rotation of a reversible motor.

[Embodiments of the Invention] The present invention will be described below with reference to FIG. 1 and FIG. 2 showing examples. In FIG. 1, the upper part of the fin 24 is omitted for ease of understanding.
As shown in FIG. 2, the upper end is attached between the upright portions of a pair of L-shaped holders 20 extending in the lateral direction by means such as screws.

Both ends of the holder 20 are attached to two couplings 22 by means such as welding, and a shaft 23 rotatably supported by the frame 7 is attached to the couplings 22 by means such as welding. One end of the shaft 23 is attached to the boot 938, and the encoder desk 40 is attached to the other end. The pulley 38
! 32, is driven and rotated by a reversible motor 30 via a pulley 34 and a belt 36. Note that 42 is a sensor that detects the slit of the encoder desk 40.

According to this embodiment, when the reversible motor 30 is rotated in the forward and reverse directions, the fins 24 are attached to the shaft 23, that is, the coupling 22.
It begins to swing back and forth using the center of rotation as a fulcrum. Further, by changing the amount of rotation of the reversible motor 30, that is, the driving time, the swing angle of the fins 24 can be changed, so that sheets 1 of various lengths can be easily handled. As a result, paper 1 of any length can be reliably folded.

Further, since a link mechanism or the like for converting rotational motion into reciprocating rocking motion is not required, the configuration is simplified. Furthermore, since the load on the reversible motor 30 does not fluctuate, there is an advantage that a small-capacity motor is sufficient.

[Effects of the Invention] According to the present invention, the reciprocating swing of the fins is performed by forward and reverse rotation of a reversible motor, so the swing angle of the fins can be easily changed, and sheets of various lengths can be easily processed. This makes it possible to reliably fold sheets of various lengths.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the device of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a side view showing an example of a general paper folding device, and FIG. FIG. 1 is a perspective view showing a conventional paper folding device. In the figure, 1 is paper;
23 is a shaft, 24 is a swing fin, and 30 is a reversible motor. Name of Patent Applicant Hitachi Koki Co., Ltd. Le 1 Figure 4D Cow 2 Kukoku Spike 4 Figure

Claims (1)

[Claims] A paper folding device that alternately folds paper from front to back by means of a swing fin that swings back and forth once every two pages of printed and ejected paper, and the back and forth swing of the swing fin is controlled by the forward and reverse rotation of a reversible drive motor. A paper folding device characterized by folding paper.