JPS61197367A - Automatic correction apparatus for deflection of fold in paper folding machine - Google Patents

Abstract

PURPOSE:To economize the labor in book making work by perfectly automating the stopper position adjustment of a contact guiding vane plate in a paper folding machine and automatically correcting the deflection of fold for the paper sheet having an erroneous cut dimension. CONSTITUTION:In the stopper mechanism 5 of the contact guiding vane plate 3 of a paper folding machine, automatic position adjustment is enabled by installing a motor-driven or other automatic controlled driving apparatus 6 which is operated by a control circuit E. A mark M is applied onto the blank part R on the back-surface side of the cut and superposed paper sheet which is reversed for the front surface through folding. Therefore, the top edge of a folded paper sheet P' is detected by a gate sensor 7 on the passage of a folded-sheet conveyor mechanism 4, and the position of the mark M at the moment is read at a same time by the mark reading sensors 8 and 9. A signal is transmitted to the automatic controlled driving apparatus 6 of the stopper mechanism 5, and when anormaly is detected, the stopper mechanism 5 is automatically corrected to a normal dimension position in accordance with the anormaly.

Description

[Detailed Description of the Invention] Conventionally, when folding paper for bookbinding, the entire printed sheet is divided into several equal parts and folded using a cutting machine. When the cutter slides and the paper is cut, or when cutting a stack of paper, the cutting position may shift as the cutter moves down (also known as a couple). This may occur, and the dimensions of the upper paper and the lower paper may be slightly different.
Therefore, an error occurs in the fold position of the paper.

In other words, in conventional paper folding machines, the paper is folded with the outer circumference of the paper aligned, resulting in misaligned folds.
The resulting signatures will be misaligned due to printing, for example, if the pattern is spread over two pages, the pattern will be misaligned and won't match up, and even if it's a notebook, the lines on both pages will be incorrect. In the past, it was impossible to produce poor-quality products in which the printing did not match or the printing was misaligned on each page even in text books, so conventionally, workers visually read the changes in the occurrence of fold misalignment while guiding the collision. Each time, the stopper position of the vane plate is finely adjusted back and forth manually and by intuition.

Therefore, this manual correction is not accurate at all due to the monthly adjustment, and it is difficult to quickly and accurately adjust the D4 in response to the occurrence of deviations, which is extremely time-consuming and troublesome, and the operator must constantly check. However, the present invention reliably and easily eliminates the above-mentioned conventional drawbacks and provides a method for adjusting the stopper position of the impact guide vane in the paper folding mechanism. By completely automating the process and correcting the fold misalignment of paper sheets that have misaligned dimensions between the top and bottom sheets during cutting, it improves accurate paper folding performance and saves labor. The purpose of this paper folding machine is to provide an economical paper folding machine that is highly demanding and has low productivity. By installing other suitable automatic control drive devices, the position ii#I! It is possible to align the sheets, and marks are made on the margins on the back side, which is folded and turned over to the front side, at a point away from the front edge.In the passage of the signature conveyor mechanism related to the signature transfer of the cut 7B stack sheet. On the other hand, we installed a mark reading device that operates the control circuit by the detection function by installing a gate sensor for detecting folds and two mark reading sensors for simultaneous detection of front and rear positional deviations in front of the gate sensor. The present invention is characterized in that the stopper mechanism of the wing plate is automatically corrected to the normal paper folding position in response to abnormality detection changes for the cutting dimension deviation folding 1.

The embodiments of the device of the present invention will be explained in detail with reference to the drawings as follows.

Is the impact guide vane plate +31 for the single paper folding roller mechanism (2) in front of the paper feed conveyor mechanism (1)? Equipment [2. In the bi-fold paper folding device which has the signature conveyor mechanism (4) installed from the roller mechanism (2) section, the stopper mechanism (5) of the impact guide vane plate (3) is installed. , control circuit IEI
By installing an electric motor or hydraulic or other suitable automatic control drive device * f61 to operate the F61, it is possible to automatically position the paper, and the blank area on one side of the back side 1111 which is folded and turned over to the front side. A mark (Δυ) is placed at a certain distance from the front side of the iRI, and the path of the signature conveyor mechanism (4) is One gate sensor 17) detects the fold V which is the front side of the signature P folded in half with respect to the top, and the sensor (
7) Two marks are arranged at front and back positions so that the front side of the mark N) can be simultaneously detected in accordance with the distance a from the accurate crease line v1 to the mark M. Increased reading sensor f81 (Due to the detection function of the three sensors with 91), the control (b) path f of the drive device 16
A mark reading device (lα) that operates El is installed, and the reading device (101) detects an abnormality due to an abnormal dimension between the fold line of the signature P and the mark M. The stopper mechanism (5) of the plate (3)
This configuration is characterized in that the paper folding position is automatically corrected to the normal paper folding position based on automatic forward and backward adjustment.

Note that the mark (Ml) may be a line, figure, character, etc., but a rectangular or thin line mark suitable for simultaneous detection is preferable. If so, you may use it.

Note that by sequentially combining the present invention in multiple ways, it can be applied to fold correction for multiple folds.

Approximately, divide the stack of all sheets of paper into equal parts [7 to 2 If you do not rely on folded paper, the cutting position will shift as described above (commonly known as a couple) in the cutting and stacking MP, and the dimensions of the front side of the paper P and the margin M will change. This will cause an error in the position of the exact fold line v1. Therefore, if the paper P is folded in half using the conventional device, a signature with completely inaccurate fold misalignment will be produced. The above-mentioned drawbacks will occur.

The device of the present invention has the above-described configuration, and has a mark reading device ff1l related to the three sensors installed above the path of the signature conveyor mechanism (4), and a stopper mechanism ( 5) is automatically moved forward and backward by the operation of the control circuit IEI. The position (state) of goods) is 2
Mark reading sensor! Interpret it with 8+ +91,
Since this is an installation that automatically corrects the stopper position in immediate response to abnormal detected changes in fold misalignment, its operation will be explained in detail as follows.

When performing paper folding, the stopper position of the impact guide vane plate (3) is set in advance to a predetermined position for folding at accurate fold #v1, and the mark reading device on the path of the signature conveyor Mkm (41) is set in advance. flQI's three flight sensor positions, namely the gate sensor (force and mark reading sensor +81
+91 simultaneous detection line tc)
By adjusting and setting the distance according to the distance of the dimension a from the accurate fold line v1 to the mark tsnt, each 2 pieces of cut stacked paper P that is folded in half and transferred to the signature conveyor mechanism (4) As shown in the detection state diagram in Figure 4, when a folded signature P is accurately folded without any misalignment, the gate sensor (7) detects the folding of the signature P as shown in Figure (B). The moment the V edge of the eye is detected, the front mark m-taking sensor 181
(9+ simultaneous detection line (simultaneous detection state at C1,
In this case, the control circuit for Pi pivot @ # f6) is OF
F, the stopper mechanism (5) remains in the stopped position, and the accurate paper folding operation continues.

By the way, as mentioned above, the cut stacked paper P has a cutting misalignment, and the length of the dimension O between the front side of the paper P and the mark M is misaligned as shown in Figure (f) or Figure f-1. Then, the exact position of the fold line #Vl will be out of order, naturally resulting in abnormal and defective paper folding.

The actual situation is shown in Fig. 9 of Fig. 4.

That is, in the case of the figure 0) in which the dimension O is short, the fold is inaccurate, and one mark M does not reach the detection line 0 when the gate sensor (7) detects the fold V. This results in a state in which simultaneous mark detection by the reading sensor +81191 does not occur. This is abnormality detection, and at that instant, the control circuit +1;, + is ONL, and the stopper mechanism (5) is controlled by the drive device (6) to automatically shorten the folding dimension.

In the case of the figure where dimension O is long (c), #[take sensor 781
After the detection state 191 occurs, the gate sensor (in a state where force is detected, this also indicates abnormality detection,
Instantly, the control circuit fE) turns ON, and the stopper-mechanism 1
5) is automatically controlled by the body @ device (6) in a free movement so as to lengthen the folding dimension.

In this way, when the above-mentioned abnormal folding occurs, the stopper mechanism (5) changes its position immediately in response to the abnormality detection state by instantaneously agile control by abnormality detection until it returns to the normal detection state as shown in the figure. It is automatically moved back and forth slightly to correct the zero force to the normal folding position, and the misalignment of the fold is automatically corrected.

Then, #:1) When the normal detection shown in the figure returns, the control circuit is instantly turned off again, the drive #J device (6) stops, the stopper position becomes the correct folding position, and normal folding is performed. It turns out.

Therefore, in the apparatus of the present invention, the gate sensor (7) first detects the advance of the signature P, issues a signal 7, and detects the mark position at that moment using the two mari reading sensors (t81191).
When an abnormality is detected, a signal is sent to the automatic control drive unit # (6) of the stopper mechanism (5), and the stopper mechanism (5) is quickly moved to the normal dimensional position in response to the detected abnormality. As a result, according to the device of the present invention, misaligned folds on paper with incorrect cutting dimensions are automatically corrected to normal folds, which saves the worker the trouble of continuing to monitor abnormal paper folds. It requires no effort at all, all misaligned folds are automatically corrected, and the double-folding process of paper with miscutting is maintained accurately and normally, so it is extremely convenient and extremely labor-saving. Fully automatic, highly accurate paper folding performance is guaranteed, and accurate binding is possible, making it highly desirable.
The advantages include providing a paper folding machine that is highly practical, has a simple structure, and is economical.

[Brief explanation of drawings]

The drawings are from a book showing embodiments of the present invention, and Fig. 1 is a perspective view of a bifold folded signature with marks, Fig. 2 is a surface view of cut stacked paper with marks, and Fig. 3 is a diagram of the apparatus of the present invention. Layout diagram,
FIG. 4 is an enlarged comparison detection state diagram of normality and abnormality shown with some parts omitted, the ←) diagram is a normal detection diagram, and the 0)f→ diagram is an abnormality detection diagram. Note that the arrow in FIG. 2 indicates the direction in which the paper is transported. (3) 0. Impact guide vane plate, (4)... signature conveyor mechanism, +5)... stopper mechanism, IEI... - control circuit, (6)... automatic control drive Equipment, M
...Mark, (7)...Gate sensor, f8
) +91...mark reading sensor, OI...轡mark reading device.

Claims (1)

[Claims] The stopper mechanism of the impact guide vane of the paper folding machine can be automatically adjusted in position by installing a suitable automatic control drive device operated by a control circuit, and the blank area on the back side where the paper is folded and turned over to the front side can be adjusted automatically. With respect to the path of the signature conveyor mechanism that is used to transport the signatures of cut and stacked sheets with marks placed away from the front side, the sensor for the gate for detecting folds and the position in front of it are misaligned. A mark reading device that operates a control circuit with a detection function by installing two mark reading sensors for simultaneous detection regarding the arrangement is installed, and the blade board is An automatic fold misalignment correction device for a paper folding machine, characterized in that the stopper mechanism of the paper folding machine is automatically corrected to a normal paper folding position.