JPH0213558A - Detecting device for scoring direction of continuous per - Google Patents

Abstract

PURPOSE:To adequately detect the folding direction of a scoring at the stage of the scoring folding way being kept by providing a detection means for detecting the crest folding or valley folding part of a continuous paper generated by the stoppage of a feed roller, etc. and providing a memory means storing the electric signal obtd. by this detection means. CONSTITUTION:A feed roller 4 is stopped and the transfer of a continuous paper 1 is temporarily stopped. On the other hand, the paper feeding operation of a tractor part 2 is stopped after transferring the continuous paper 1 in specified amt. by continuing the feeding operation by the tractor part 2 as it is. As a result, the folding way position of scoring on the continuous paper 1 is projected upward or downward at the center part of a form guide opening part 3a. The scoring part of the continuous paper is subjected to crest folding or valley folding by this projection. This crest folding or valley folding is detected by paper folding detectors 6a, 6b getting into contact therewith and stored in order in a memory device 7. This stored information is transmitted to a folding mechanism provided at the paper discharging part inside a printer device and the folding direction of the scored part is restored.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to detecting the direction of folds along perforations in continuous paper used in high-speed printers used as output devices for converters, particularly in electrophotographic systems.

[Conventional technology]

Conventionally, in an electrophotographic apparatus that uses continuous paper such as folding paper, the continuous paper is transported at an extremely high speed in addition to high-speed printing, so a means for quickly and accurately folding the continuous paper after printing is required.

To print characters, figures, etc. in an electrophotographic device, a thermal fixing method (e.g. heat roll) is used, so the folded part of the perforation of continuous paper may be elongated, and sometimes wrinkles may occur. The original folds are significantly weakened and the restoring force is weakened. For this reason, when the continuous paper ejected from the printing device falls into the paper storage section, it is unwound regardless of the direction in which the perforations are folded.
As a result, the sheets are not folded neatly, and the sheets protrude from the paper storage section, and the sheets have to be sorted out manually, which requires troublesome work and time.

To prevent these conditions, a paper folding device is provided after the continuous paper is discharged from the device. This device is a commonly used method in which a pendulum-moving oscillating plate is synchronized with the perforations of continuous paper to distribute the paper.

[Problem to be solved by the invention]

Generally, in printers that use continuous paper, the paper transport path inside the printer is not necessarily arranged in a straight line. This is partly due to the need to downsize printer devices, etc., and the conveyance path has a partially bent arrangement, so that when the continuous paper passes, the mountain folds and valley folds of the perforations are It is ejected from the printer section after being stretched or bent at the bend.

As mentioned above, in electrophotographic printing devices, since the thermal fixation method is performed using heat and pressure, the folded part of the perforation of the continuous paper may be elongated, and sometimes the continuous paper may be ejected from the printer in a wrinkled form. Because of this, it was unreliable to fold neatly into the paper storage section. In order to solve these problems, the above-mentioned paper folding device has been provided, but it has the disadvantage of being complicated and expensive.

[Means to solve the problem]

The present invention has been made in view of the above points, and has the purpose of detecting the fold direction (mountain fold or valley fold) of the perforation in advance while the fold of the continuous paper is maintained. This is what I did.

In order to achieve all of the above objects, the paper has a feed roller that freely repeats the movement of contact with and separation from the paper, or a stash lever operated by a magnet, and can determine the feeding distance of the paper to the minimum position during the conveyance of the continuous paper. a photoelectric detection means for detecting the leading edge of the paper, a detection means for detecting a mountain fold or a valley fold portion of the continuous paper generated by stopping the feed roller, etc.; and a memory for storing the electrical signal obtained from the detection means. It consists of means.

[Effect]

According to the present invention having the above-mentioned means, after continuous paper is set in a printer device, it is automatically transported, transferred through various processes such as transferring characters and figures on the photosensitive drum surface, and then thermally fixing (e.g., using a heat roll). Through a series of operations, the folding direction of the perforation can be detected at a position immediately after the continuous sheet is automatically conveyed, and this can be converted into an electrical signal and stored in the storage device.

〔Example〕

Hereinafter, the present invention will be explained in detail according to the drawings.

FIG. 1 is a partial side view of one embodiment of the present invention.

In the figure, 1 is continuous paper, 2 is a tractor unit that conveys the continuous paper, 3 is a paper guide, 3a is an opening of the paper guide, and 4 is a pair of feed rollers that rotate and stop by a drive source (not shown). conduct.

Reference numeral 5a is a light emitting element, and 5b is a light receiving element (hereinafter referred to as photoelectric detector 5), which detects the entire leading edge of the continuous paper.

6a+6b is a detector that detects all the mountain folds or valley folds at the perforations of the continuous paper, and 7 is a storage device that stores the output signal of the mountain fold or valley fold detected by 6a or 6b.

Now, the continuous paper 1 is set on the tractor section 2, and is conveyed in the direction of the arrow by a drive source (not shown) of the tractor section 2.

Continuous paper 1 is guided by a paper guide 3 and advances, and a photoelectric detector 5 detects the leading edge of the paper.

Here, as shown in FIG. 3, the length L between the perforations of the continuous paper 1 used is determined in advance by paper manufacturing standards. Therefore, a mountain fold or a valley fold at the perforation of the continuous paper 1 is detected at a position further advanced by a distance from the position where the leading edge of the continuous paper 1 is detected by the photoelectric detector 5, that is, at a position (L+t). Paper fold detectors 6a and 6b are provided.

In this way, the folding position of the perforation can always be set at the center of the paper opening 3a by the photoelectric detector 5.

As a subsequent operation, the rotation of the feed roller 4 is stopped by a drive source (not shown), and the conveyance of the continuous paper 1 is temporarily stopped. On the other hand, the sheet feeding operation by the tractor section 2 continues as it is, and after conveying the sheet by a predetermined amount, the sheet feeding operation of the tractor section 2 is stopped.

As a result, as described above, the folding position of the perforation of the continuous paper 1 tends to protrude upward or downward at a part of the center 6 of the paper guide opening 3a. At this time, the continuous paper 1 tries to bend at the weak perforations where the folds are formed. That is, as shown in FIG. 1, if it is in a mountain-folded state, it is bent as shown in 1a, and if it is in a valley-folded state, it is bent as shown in 1b. For example, assuming that the paper protrudes in the direction of the mountain fold 1a, these 18 parts collide with the paper fold detector 6a.

Then, by the detection operation of the paper fold detector 6a, it is converted into an electrical signal and stored in the storage device 7 as "mountain fold 9J".Contrary to the above example, if a valley fold occurs, the paper fold detection is performed. 6b, and its detection signal is stored in the storage device 7 as a "valley bend" in the same way as above.

In the subsequent paper processing operation, in order to return the protruding continuous paper to the normal horizontal conveyance state, first, the feed roller 4 is driven to convey the protruding amount by the amount known in advance.
Make it horizontal. It goes without saying that the tractor unit 2 is in a stationary state during this operating time.

Thereafter, the continuous paper l is rotated in synchronization with the drive of the tractor unit 2 and the drive source of the feed roller 4, and performs a normal paper conveyance operation.

Next, FIG. 2 will be explained.

FIG. 2 is a partial side view showing another embodiment.

The mechanism for stopping the conveyance of continuous paper by the feed roller 4 explained in FIG. 1 is replaced with a granger magnet drive mechanism. In the figure, 8 is a plunger magnet, 9
is a link, and 10 is a stop lever. Other symbols are the same as in FIG. 1.

Now, due to the suction operation of plunger magnet 8, link 9
The stop lever 10 rotates counterclockwise around the shaft 11, and its tip serves as a mechanism for forcibly stopping the running of the continuous paper 1. The subsequent method of detecting a mountain fold or a valley fold is the same as the operation explained in FIG. 1, and will therefore be omitted. The paper processing operation after detecting a mountain fold or valley fold is to return the protruding continuous paper to the normal horizontal conveyance state.
First, the rotational direction of the tractor section 2 is driven in the direction opposite to the normal conveyance direction A, and the tractor section 2 is conveyed by a predetermined amount of protrusion, and returned to a horizontal state. During this operating time, stop lever 1
The leading end of the paper 0 is holding down the continuous paper 1. When the predetermined rotational speed is completed, the suction state of the plunger magnet 8 is released, and the stop lever 1°Fi@11 is rotated clockwise as a pivot, and the tip of the stop lever is separated from the pressing surface of the continuous paper. , are kept separated by springs 12.

In the embodiments of the present invention, a detection method using a microswitch is described as the perforation fold direction detector, but a photoelectric detection method such as a reflective optical sensor may be used.

In addition, the perforation length L of the continuous paper 1 is determined depending on the paper standard used, and the folding and folding directions are regularly and alternately folded, so when detecting the folding direction,
For example, by first detecting the mountain fold direction, subsequent fold directions can be easily determined, so it is possible to use only one detector 6a. FIG. 4 shows an operation flow for detecting the perforation fold direction of the continuous paper 1. As shown in FIG.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to easily determine whether the fold direction of the perforation of continuous paper is a mountain fold or a valley fold within the printer device and at a position immediately after the device automatically transports the sheet. and can be memorized. By notifying the result as a signal to a folding mechanism (not shown) provided in a paper discharge section in the printer, the folding direction of the perforation can be restored. Therefore, the paper discharged from the printer device can be neatly folded into the paper storage section.

[Brief explanation of the drawing]

FIG. 1 is a partial side view showing an embodiment of the present invention. FIG. 2 is a partial side view showing another embodiment, and FIG. 3 is a perspective view of continuous paper. FIG. 4 is a flowchart showing the control system of the present invention. 1... Continuous paper, 2... Tractor section with bin, 3...
・Paper guide, 4...Feed roller, 5a, 5b・
...Photoelectric detector, 6a, 6b... Paper fold detector, 7
...Storage device, 8...Plunger magnet, 9.
・・Link, 1θ・−・Stop lever, 1 No. 11
2...Spring.

Claims (1)

[Scope of Claims] A printer using continuous paper having folds at regular intervals, comprising: paper feeding means provided at both ends of the continuous paper; means for moving towards and away from the paper using an electromagnetic clutch; When the perforation of the continuous paper is a mountain fold, the mountain fold is detected by a photoelectric detection means that detects the leading edge of the paper and a contact operation of the means that performs the approach and separation operation on the paper at the center position of the opening of the paper guide. a detection means for detecting the valley fold when the perforation is a valley fold; and a detection means for detecting the valley fold;
1. A perforation fold direction detection device for continuous paper, comprising: storage means for storing detection results of mountain folds or valley folds at perforations.