JPS6038299B2 - paper handling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper processing device for a line printer that automatically loads paper and processes the paper according to the amount of paper feeding within the paper processing device.

Generally, a paper processing device is a device that receives printed paper from a line printer and folds the paper within a predetermined width.In this case, the maximum paper feeding speed of a line printer is about 1,000 minutes. The printing speed is about 100 inches/second, whereas the effective paper feeding speed of the paper processing device is set to about 50 inches/second. The reason for setting the effective paper feeding speed of this paper processing device is that, due to the nature of the paper, if the paper is fed at a speed of approximately 50 inches/second or higher, good folding will not occur, and furthermore, line printers can continuously operate at the maximum speed. (skip, motion, etc.), so even if the effective paper feed speed of the paper processing device is slower than the maximum paper feed speed of the line printer, in actual use (for example, when a line printer (The paper feed speed when performing a printing operation is about 10 inches/second) can provide sufficient response, and by lowering the effective paper feed speed of the paper processing device, stable paper processing operations and an inexpensive paper processing device can be achieved. This is so that you can be saved. However, since the effective paper feeding speed of a paper processing device is slower than the maximum paper feeding speed of a line printer, a line printer that is synchronized with the paper feeding speed of a line printer is not necessarily synchronized with the paper feeding speed of a paper processing device.

However, since the paper processing device operates the swing fins to fold the paper according to the amount of paper fed within the device, it is necessary to detect and synchronize some kind of pulse signal that is synchronized with the paper feeding speed within the paper processing device. However, depending on the paper processing speed of line printers, etc., if the swing fin operation is performed based on the starting edge of the paper, the paper may bounce at the starting edge, and the paper may not be folded accurately. SUMMARY OF THE INVENTION An object of the present invention is to provide a paper processing apparatus that can perform excellent paper processing by changing the operating timing of swing fins in order to prevent bouncing when processing the starting edge of paper. According to the present invention, continuous folding paper is automatically loaded and swing fins operate according to the paper feed amount in the paper processing device, so that the starting edge of the paper can be used in a paper processing device of a line printer that performs a paper folding operation. By including a means for preventing splashback during processing, a paper processing apparatus that can perform excellent paper processing can be obtained.

An embodiment of the present invention will be described with reference to the drawings.

Mechanically, the paper processing device 5 of the present invention includes a paper guide section 6 for guiding the paper 4 to a feed roller 7, and a feed roller 7 for feeding the paper 4, as shown in FIG. , a swing that folds the paper 4 onto the pedestal 9;
It is comprised of a fin 8, a pedestal 9 for accumulating the paper 4, a paper detection microswitch 10 for detecting the starting point of the paper processing operation of the paper processing device 5, and the like. Electrically, as shown in FIG. 2, there is a paper length setting rotary switch 1 for setting the paper length of the paper to be processed.
A feed pulse disk 14 and a feed pulse detection means 15 are attached to the feed roller 7 to generate a feed pulse that simulates the paper feed amount of the paper processing device, which corresponds to the paper feed amount of the paper processing device. an up/down counter 7 for detecting the feed pulse generated by the paper processing device, a paper length counter 20 for counting the paper feed amount of the paper processing device, and a paper length matching circuit 21 for detecting the driving timing of the swing fin. , a swing timing delay circuit 22 for delaying the drive timing of the swing fin, a swing timing advance circuit 24 for basing the drive timing on the swing fin, and a swing fin control circuit for driving the swing fin. 2
It is composed of 6 mag. Note that the tractor 3 of the line printer is provided with a line pulse disk 12 for generating line pulses that match the paper feed amount of the line printer.・Pulse is detected. Next, an overview of the operation of the paper processing device 5 will be explained.The paper 4 is transported by the tractor 3 of the line printer, printed at the position of the type drum 2, and sent to the paper processing device 5.

In the paper processing device 5, the paper 4 is allowed to fall naturally by the paper guide section 6, is automatically bitten by the feed roller 7, and is placed on the pedestal 9 by the swing fins 8 swinging left and right according to the paper length and paper feed amount. Correctly folded and stored. The pedestal 9 automatically descends according to the amount of accumulated paper 4, but since it is not directly relevant to this application, its explanation will be omitted. Further, the paper processing device 5 detects when the paper 4 is bitten by the feed roller 7 and the paper detection micro switch 10
Paper processing starts from the moment the is activated. In the paper processing device, first, a logical interface provided between the line printer 1 and the paper processing device 5 is used to
Have the printer supply line pulses that match the amount of paper feed.

This line pulse generation means is the line printer 1.
A line pulse disk 12 is attached to the drive shaft of the tractor 3.
A line pulse detection means 13 detects a large number of equally spaced slits provided on the disk surface and sends out the pulses. The means for generating a feed pulse that simulates the paper feed amount of a paper processing device is to provide a feed pulse disk 14 on the drive shaft of the feed roller 7, and to feed pulses through a large number of equally spaced slits provided on the disk surface. The pulse detection means 15 detects the pulse and sends out the pulse. The feed pulse detected by the feed pulse detection means 15 is a feed pulse that simulates the paper feed amount of the paper processing device 5 because the feed roller 7 is constantly rotating. Next, the up/down counter 17 extracts feed pulses that simulate the paper feed amount of the paper processing device by the number of line pulses that match the paper feed amount of the line printer, and calculates the paper feed amount of the paper processing device. Create a feed pulse that matches the That is, the up/down counter 17 increments the line pulses that match the paper feeding amount of the line printer by the line pulse detection means 13, and only when the count value of the counter 17 is not zero, the feed pulse detection means is activated. By decrementing the feed pulse simulated by the paper feeding amount of the paper processing device by the counter 15, the decrement count signal of the counter 17 is used as a feed pulse that matches the paper feeding amount of the paper processing device. The paper length counter 20 counts the feed pulses that match the paper feed amount, and uses the counted value as the paper feed amount of the paper processing device. The counted value of the paper length counter 20 is supplied to a paper length matching circuit 21. When the paper length matching circuit 21 matches the set value of the paper length setting rotary switch 11 that sets the paper length of the paper processed by the paper processing device, it sends out the output and controls the swing fin. The circuit 26 is activated and the paper length counter 20 is reset. Swing fin control circuit 2
6 moves the swing fin 8 by one step in response to a command from the paper length matching circuit 21, that is, a signal passed through an AND gate 23 and an OR gate 25. Note that although the drive means for the swing fin 8 is not specifically shown, it can be realized by a very general means such as an electromagnetic clutch, so its explanation will be omitted. Further, the operation of the swing fin 8 is such that one cycle is performed in four steps: left side → center → right side → center. Next, referring to FIG. 2, a detailed explanation will be given of a means for preventing bounce when processing the starting edge of the paper 4 in the paper processing apparatus 5 of the present invention.

The paper length one-number verification circuit 21 is connected to a swing timing delay circuit 22 and a swing timing advance circuit 24 .

The output of the swing timing phase delay circuit 22 is connected to the swing fin control circuit 26 via the AND gate 23 and the OR gate 25, and the output of the swing timing phase advance circuit 24 is connected to the swing fin control circuit 26 via the OR gate 25.
It is connected to the fin control circuit 26. The paper detection microswitch 10 is connected to a reset terminal of an up/down counter 17 and a paper length counter (via an OR gate 19), and is further connected to a swing timing delay circuit 22 and a swing timing advance phase circuit. circuit 2
o connected to the reset terminal of No. 4. Next, the operation of the bounce prevention means of the present invention will be explained in detail.

First, since the paper processing apparatus 5 of the present invention is of a type that automatically loads the paper 4, the starting point of the paper processing operation is detected at the position of the feed roller 7 by the paper detection micro switch 10. This output signal is supplied to each reset terminal of the up/down counter 17, paper length counter 20, swing timing delay circuit 22, and swing timing phase advance circuit 24 to initialize them. That is, each circuit starts its control operation from the time the starting edge of the paper 4 is detected. On the other hand, the line printer 1 sends line pulses corresponding to the amount of paper feed to the drive shaft of the tractor 3 of the line printer 1 through a number of equally spaced slits provided in the line pulse disk 12, magnetically or optically. is detected by the line pulse detection means.

Note that while the sheet 4 is fed one inch by a means similar to the means for generating line pulses, means for generating, for example, six or eight line pulses are included, so that the line pulses cannot be detected by this means. Line pulses may also be used. Further, in the present invention, the feed pulse that simulates the paper feed amount of the paper processing device 5 is
Fi. A feed pulse is applied to the drive shaft of the feed roller 7.
A large number of equally spaced slits provided on the disk 14 are detected by a feed pulse detection means 15 magnetically or optically.

The feed pulse that matches the paper feed amount of the paper processing device 5 is a pulse that matches the AND gate 16 among the feed pulses that simulate the paper feed amount, and is processed by the AND gate 16, the up/down counter 7, and the OR gate 18. It can be taken out. The number of line pulses and feed pulses that match the paper feed amount for a constant paper feed amount of the line printer 1 and paper processing device 5 must be the same or an integral multiple, but the present invention In the embodiment described above, it is assumed that the number of line pulses and feed pulses for a constant paper feed amount of both devices are the same. A feed pulse that matches this paper feed amount is supplied to two paper length counters, and the counted value of this paper length counter 20 is expressed as the paper feed amount of the paper processing device 5.

The paper length matching circuit 21 matches the setting value of the paper length setting rotary switch 11 with the counted value of the paper length counter 20, and activates the swing fin control circuit 26 to drive the swing fin 8 by one step. However, the swing timing delay circuit 22 and the swing timing
The timing phase advance circuit 24 is activated. The swing timing delay circuit 22 counts the output of the matching circuit 21,
By closing the AND gate 23 at an appropriate time, the operation timing of the swing fin 8 is delayed, such as not sending the output of the paper length matching circuit 21 to the swing fin control circuit 26. The swing timing phase advance circuit 24 counts the output of the matching circuit 21 and outputs the swing timing signal to the swing fin control circuit 26 of an appropriate number of steps at an appropriate time, such as through an OR gate 25.
The operation timing of the fin 8 is advanced. In addition, the swing
The timing phase advance circuit 24 counts the output of the paper length matching circuit 21, and when an appropriate timing is reached, controls the swing fin 8 delayed by the swing timing phase delay circuit 22 to return to its original operating timing. Note that the swing fin 8 forms one cycle with four steps: left side → center → right side → center, so when the swing timing delay circuit 22 delays the swing timing by 4 steps or a step that is a multiple of 4. Although the swing timing phase advance circuit 24 is not necessary, the present invention is described assuming that the swing timing phase delay circuit 22 delays the swing timing by steps other than 4 steps or steps that are a multiple of 4.

The number of steps to be delayed by the swing timing delay circuit 22 varies depending on the mechanical dimensions of the paper processing device, etc., but realistically, the swing timing is delayed by one step by the swing timing delay circuit 22, and the swing timing is delayed by one step. As long as the timing phase advance circuit returns the swing timing to its original state around the third to fourth steps, the female end of the paper 4 can be processed satisfactorily. As explained above, the present invention provides a paper processing device that prevents bouncing of the starting edge of the paper and performs good paper processing by including means for changing the drive timing of the swing fin 8 at the starting edge of the paper to be processed. It will be done.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the structure of a paper processing device, and FIG. 2 is a block diagram of the paper processing device of the present invention. 1...Line printer, 2.T...Type drum,
3...Tractor, 4...Paper, 5...
...Paper processing device, 6...Paper guide section, 7...
Feed roller "8...Swing fin, 9...
... cradle, 10 ... paper detection micro
Switch, 11...Rotary switch for setting paper length, 12...Line/Gurus disk, 1
3""" line/gurus detection means, 14...
Feed pulse disk, 15... Feed pulse detection means, 16... AND gate, 1
7... Up/down counter, 18... OR gate, 19... OR gate, 20... Paper length counter, 21... Paper length matching circuit, 22...
... Swing fin phase delay circuit, 23 ... AND gate, 24 ... Swing fin phase advance circuit, 25
...OR gate, 26...Swing fin control circuit. Figure 2 Figure 1

Claims (1)

[Claims] 1 By attaching continuous folding paper and operating the swing fin according to the paper feed amount in the paper processing device, the paper processing device of a line printer that performs the paper folding operation has a swing fin in the processing of the starting edge of the paper. A paper processing device comprising means for controlling the operation timing of a swing fin in order to prevent curling.