JP2004322286A - Cutting failure detecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting failure detecting device for preventing a discharge mechanism for discharging a defective cut book from malfunction caused by a cut piece generated by a cutter for cutting a printed book. <P>SOLUTION: This cutting failure detecting device is provided with a carrying means 22 for carrying a cut book to a prescribed position, photoelectric sensors 23 to 25, and 26 to 28 for detecting finish width failure of the cut book carried to the prescribed position, cut book existence detecting sensors 29 and 30 for determining the existence of the cut book in the prescribed position, and a discharge mechanism 31 for discharging the cut book of the finish width failure by a finish width failure signal and a cut book existence signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cutting defect detection device in finishing cutting in a bookbinding process, and more particularly to a cutting defect detection device for preventing occurrence of jam due to malfunction due to cutting pieces or chips in a device for inspecting cutting dimension defects. It is.
[0002]
[Prior art]
As a conventional dimension discriminating apparatus for discriminating the dimensions of a plate-like body, as shown in FIG. 7, a plate-like body 4 is placed on a moving conveyor 1 and conveyed in the direction of an arrow. The reflection photoelectric tubes 3a and 3b are arranged at predetermined intervals, and when the plate-like body 4 passes directly below the reflection photoelectric tubes 3a and 3b, the reflection photoelectric tubes 3a and 3b detect reflected light from the plate-like body 4, The detection signal is input to a discriminator 5 to turn on one of the display lamps 6a, 6b, and 6c to determine whether the dimensions of the plate-like body 4 are good. The plate-like body 4a in FIG. It is possible to determine that the desired size is not satisfied and that the plate-shaped body 4b is longer than the desired size (see Patent Document 1).
[0003]
Further, as another conventional example of a cut book defective product detection apparatus, as shown in FIG. 8, a conveyor 1 for transporting a cut book 10, photoelectric switches 7, 8, and 9, and a light source 7 paired with these photoelectric switches. ', 8', 9 '. The trimming book 10 is conveyed by the conveyor 1 in the direction of the arrow, and the photoelectric switches 7 and 9 detect a width region between the back and the fore edge of the trimming book 10. Since the interval between the photoelectric switches 7 and 9 is set in a width range from the back of the cutting book 10 to the fore edge, when the cutting book 10 has a predetermined finishing width, the back of the cutting book 10 reaches the photoelectric switch 9. The photoelectric switch 7 is in an operation state (ON state). If the cut book 10 is narrower than the predetermined finishing width, the photoelectric switch 7 is turned off before the spine of the cut book 10 reaches the photoelectric switch 9. (See Patent Document 2).
[0004]
9 (a) and 9 (b), the cutting book 10 placed on the conveyor 1 is transported in the direction of the arrow, and the photoelectric switch is turned on. 11 (14), 12 (15), 13 (16) are provided, and light receiving sections 11 '(14'), 12 '(15'), 13 '(16') are arranged in pairs with these photoelectric switches. As shown in FIG. 9B, a cut book 10 whose front edge is cut diagonally can be determined to be defective (see Patent Document 3).
[0005]
[Patent Document 1]
Copy of the specification of Japanese Utility Model Laid-Open No. 51-125953 (Pages 3 and 4 of the specification, FIG. 1 of the drawings)
[Patent Document 2]
JP-A-59-49156 (pages 1 and 2 of the specification, FIGS. 1 to 3 of the drawings)
[Patent Document 3]
Japanese Patent Application Laid-Open No. 60-20160 (2 pages of the specification, FIG. 3 and FIG. 5 of the drawings)
[0006]
[Problems to be solved by the invention]
In the bookbinding process, a cutting book defect detecting device for inspecting the finishing width of the cutting book as described in the above-described conventional example is attached to the cutting apparatus. As shown in FIG. 10, the discharge unit is provided with a discharge mechanism 17 for discharging a defective cut book by a discharge claw or the like. Had been discharged. However, trimming scraps or trimmings (hereinafter referred to as trimming pieces) when the three sides of the printed book are trimmed may be transported to the trimming book defect detecting device, and the trimming book is transported to the trimming book defect detecting device. In spite of this, the sensor such as the photoelectric switch for checking the size of the trimming book is operated, and it is erroneously determined that the trimming book is defective. There is a possibility that the cutting book 10 may be pushed up, or the cutting book 10 may be prevented from being sent to a transport path subsequent to the cutting book defect detecting device.
[0007]
Further, conventionally, the bookbinding line is stopped by detecting that a trimmed book has accumulated in the transport path and a jam has occurred for the first time after the trimming apparatus has been stopped, but the productivity may be deteriorated, and a jam occurs. Previously, there has been a demand for a cut book defect detecting device that can detect the undetectable state of the cut book defect detecting device, which is the cause of the occurrence, and prevent malfunction of the discharge mechanism.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems, and provides a cutting device that can prevent a discharge mechanism that discharges a defective cutting book from malfunctioning due to a cutting piece generated by a cutting device that cuts a printed book. It is an object to provide a defect detection device.
[0009]
[Means for Solving the Problems]
The present invention has achieved the above object, and the invention according to claim 1 includes a conveying unit that conveys a trimmed book to a predetermined position,
Dimension detecting means for detecting the finishing width of the cut book conveyed to a predetermined position,
Cutting book presence detecting means for detecting the presence or absence of a cutting book at a predetermined position,
A discharge unit that discharges the trimmed book with a defective finish width when the dimension detecting unit detects a trimmed width defect of the trimmed book and the trimmed book presence / absence detecting unit determines that the trimmed book is present. This is a cutting defect detection device.
[0010]
According to the first aspect of the present invention, the trimmed book is transported to the predetermined position by the transporting unit, the finishing width of the trimmed book transported to the predetermined position is detected by the dimension detecting unit, and the presence or absence of the trimmed book at the predetermined position is determined. Detected by the detecting means, the dimension detecting means detects the finishing width defect of the trimming book, and when the trimming book presence / absence detecting means determines that there is a trimming book, the trimming book with the finishing width defect is discharged from the discharging means. A cutting defect detecting device, in which the dimension detecting means mistakenly recognizes that the cutting width is a cutting book having a defective finishing width by the cutting pieces and erroneously operates the discharging means, thereby conveying the non-defective cutting book from the predetermined position to the subsequent stage. Has the effect of not hindering the operation.
[0011]
That is, in the cutting defect detecting device of the present invention, when the finishing width defect is detected and it is determined that the trimming book is present, the trimming unit having the defective finishing width is discharged by operating the discharging unit as a normal determination result. If a defective finishing width is detected and it is determined that there is no trimming book, it can be determined that a trimming piece has been detected. More specifically, a normal determination result is obtained by inputting a finishing width failure signal from the dimension detecting means and a signal indicating the presence or absence of a trimming book from the trimming book presence / absence detecting means to an AND circuit (logical product calculating circuit) or a logical product calculating means, Only when both signals are detected, the discharge operation judging means outputs a defective product discharge control signal and the discharge means operates, so that the trimmed book with a defective finishing width can be reliably discharged, so that the discharge means malfunctions. Without having the effect of preventing the occurrence of jam. The predetermined position is a position at which the finishing width of the cut book is detected.
[0012]
Further, according to the invention of claim 2, the size detecting means and the trimming book presence / absence detecting means comprise sensors, and output a stop signal for stopping the operation when any one of the plurality of sensors is in an operating state for a predetermined time. The cutting failure detecting device according to claim 1, further comprising a stop signal output unit.
[0013]
According to the invention of claim 2, the stop signal for outputting a stop signal for stopping operation when any one of the plurality of sensors is in an operating state for a certain period of time, wherein the size detecting means and the cut book presence detecting means are sensors. The cutting defect detecting device according to claim 1, further comprising an output unit, wherein one of the plurality of sensors is in an operating state for a predetermined time, and the operating state of the cutting piece is determined to be continuous. In such a case, a stop signal to stop the operation is output from the stop control means, and the printing book is sent to the cut book, and the cutting machine sends the cut book to the cut defect detecting device. By controlling so as to stop feeding, it has an effect of preventing the occurrence of jam. The above sensor may be a transmission type photoelectric sensor or a reflection type photoelectric sensor, and the cut book presence detecting means does not prevent the use of an ultrasonic sensor or a pattern matching sensor.
[0014]
According to a third aspect of the present invention, in the cutting defect detecting device according to the second aspect, the stop signal output unit is configured such that an operation state of any one of the plurality of sensors is equal to or longer than a passage time during which the cutting book passes a predetermined position. A cutting defect detection device characterized in that it is a unit that outputs whether or not it is continuous or not by means of an operating time measuring means and outputs a stop signal when it is determined that the operating state is continuous for a transit time or longer. .
[0015]
In the invention according to claim 3, the stop signal output means in the cutting failure detecting device according to claim 2 is such that the operating state of any one of the plurality of sensors is continuous for a passage time or more when the cutting book passes a predetermined position. Is a means for outputting a stop signal when it is determined that the operating state is continuous for a transit time or longer. The defect detection device determines that it is not possible to detect a cutting defect and outputs a stop signal, thereby having an effect of preventing an abnormal stop due to the occurrence of a jam. Incidentally, the operating time measuring means measures the duration of the operating state, compares the reference passing time from the reference time setting means with the duration of the operating state by the comparing and determining means, and outputs a stop signal. The determination is made by the operation time measurement / comparison determination means. Note that the time required for the cutting book to pass through the predetermined position is the time required for the cutting book to pass from the spine to the fore edge of the predetermined position, but the transport time required for the cutting book spine to reach the predetermined position cannot be ignored. The time when the cut book passes through the predetermined position includes the time until the cut book is transported to the predetermined position.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a cutting defect detecting device according to the present invention will be described below with reference to the drawings. In the bookbinding process, the printed paper sheet is folded up and bound on the back of the signature with thread, metal, adhesive, etc., and the top and bottom edges of this book are cut and conveyed to the post-process. The present invention relates to an apparatus for detecting a cutting defect in a bookbinding process.
[0017]
This embodiment will be described with reference to FIGS. The cutting failure detection device 20 of the present embodiment is installed at a stage subsequent to a cutting machine 21 that cuts three sides of a printed book. In the cutting machine 21, the bound print book is fed with its back side facing in the transport direction, the top and bottom cutting blades cut the top and bottom of the print book 10a, and then the fore-edge of the print book 10b is cut by the fore-edge cutting blade. In this cutting process, the top, ground, and fore-edge cutting pieces 18a to 18c are cut off, and the cut book 10 cut in three directions is sent to the cutting defect detection device 20 via a conveyor (transporting means) 21a. On the other hand, the cutting pieces 18a to 18c are normally dropped and discharged, but a part of the cutting pieces is carried on the cutting book 10 or the carrying means 21a, and is conveyed to the cutting defect detecting device 20, or is cut by static electricity or the like. There is a case where the cutting piece attached to the blade is conveyed to the cutting defect detecting device 20 while being sandwiched between the cutting book 10 and the conveyor 21a.
[0018]
A cutting book 10 from a conveyor (transporting means) 21a of a cutting machine 21 is fed to the cutting defect detecting device 20, and the cutting book 10 is sandwiched between conveying means 22 including conveyors 22a and 22b, and a predetermined finishing width detecting position is detected. (Hereinafter, referred to as a predetermined position). Above the conveyance path at a predetermined position, photoelectric sensors 23 to 25 and photoelectric sensors 26 to 28, which are sensors for detecting the finished width, are provided as dimension detecting means for detecting the finished width of the cut book 10. The photoelectric sensors 23 to 25 are arranged in series in the transport direction of the trimming book 10, and the photoelectric sensors 26 to 28 are similarly arranged in series in the transport direction of the trimming book 10, and these sensors are arranged in parallel to the transport direction. ing. Light sources 23 ′ to 25 ′ and 26 ′ to 28 ′ are arranged below the conveyance path in pairs with the photoelectric sensors 23 to 25 and 26 to 28. The dimension detecting means is configured as described above, detects the finishing width of the trimming book 10, and outputs a finishing width defect detection signal when the finishing width is defective.
[0019]
Further, the cutting defect detecting device 20 is provided with a cutting book presence / absence detecting sensor 29, 30 for inspecting the presence or absence of the cutting book 10 substantially above the center of the predetermined position. Is composed. In FIGS. 1 and 2, the cut book presence / absence detection sensors 29 and 30 are arranged parallel to the back of the cut book 10, but to detect the cut books 10 having different finishing widths. Is included. The cut book presence / absence detection sensors 29 and 30 constitute a cut book presence / absence detecting means, and unless the cut book presence / absence detecting means detects that the cut book 10 is present at a predetermined position and outputs a cut book present signal, Even if the dimension detecting means detects the defective finishing width, the control is performed so that the trimmed book having the defective finishing width is not discharged.
[0020]
A discharge mechanism (discharge means) 31 for discharging the trimming book 10 ′ having a defective finishing width to the outside is provided at a discharge portion of the cutting defect detection device 20. The discharge mechanism 31 is provided with a discharge claw 31a and a rotating mechanism (not shown) for rotating the discharge claw 31a, and constitutes discharge means. When the dimension detecting means of the cutting defect detecting device 20 detects the finishing width defect of the cutting book 10 and the cutting book presence detecting means detects the presence of the cutting book, the ejection claw 31a rotates upward, and the defective cutting book 10 ′ Is prevented from being conveyed to the subsequent stage and is sent to the discharge chute 32 to be discharged. If the finishing width of the cut book is within the allowable range, it is passed as a non-defective product through the discharge mechanism 31 and fed to the conveying means 33 for the next process.
[0021]
Next, a description will be given, with reference to FIG. The trimming book 10 is transported from the back side to a predetermined position P in the direction of the arrow, and first, the photoelectric sensors 23 and 26 detect the spine of the trimming book 10. The photoelectric sensors 24, 25, 27, and 28 detect the fore edge of the cut book 10 at the timing when the spine of the cut book 10 is detected. The interval between the photoelectric sensors 23 (26) and 25 (28) detects the finishing width from the back to the fore edge of the cut book. The photoelectric sensors 24 and 27 arranged inside the photoelectric sensors 23 (26) and 25 (28) are sensors for determining whether or not the fore edge of the cutting book 10 is cut diagonally.
[0022]
For example, assuming that the photoelectric sensor 23 operates when the light of the light source 23 ′ is blocked by the cutting book 10, this operation state is “ON”, and when the light of the light source 23 ′ is received by the photoelectric sensor 23, Description will be made as “off”. The same applies to the other photoelectric sensors 24-28. At the timing when the photoelectric sensors 23 and 26 detect the back of the trimming book 10 and turn “ON”, if the photoelectric sensors 24 and 27 are “ON” and the photoelectric sensors 25 and 28 are “OFF”, trimming is performed. It can be determined that the finishing width from the back to the fore edge of the book 10 is within the allowable range. Further, if either of the photoelectric sensors 24 and 27 is “ON” at the timing when the spine of the cutting book 10 is detected, it can be detected that the fore edge side of the cutting book 10 is cut diagonally, and finishing is performed. It can be determined that the width is defective. When either of the photoelectric sensors 25, 28 is turned on, it is possible to detect that the finishing width from the back to the fore edge of the trimming book is longer than an allowable range. In this manner, it is possible to detect whether the finishing width of the cut book is within the allowable range or out of the allowable range depending on the operation state of the photoelectric sensors 24, 25, 27, and 28. A finish width failure detection signal is output.
[0023]
On the other hand, as shown in FIG. 4, when the cutting piece 18 obtained by cutting the three sides of the printed book from the cutting machine 21 is sent to the cutting failure detecting device 20, the photoelectric sensor 23 or 26 is turned on, and the other Since the photoelectric sensors 24 (27) and 25 (28) are “OFF”, the cutting failure detection device 20 determines that the cutting book 10 is defective in finishing width and outputs a defective finishing width signal. At this time, when the discharge claw 31a of the discharge mechanism 31 rotates, the cut book 10 being conveyed is pushed up to cause a jam, but in the present embodiment, the cut book presence detecting means by the cut book presence detection sensors 29 and 30 is used. It is determined whether or not the trimming book 10 is conveyed to the predetermined position P, and unless there is a trimming book, the trimming book present signal is not output, so that the ejection claw 31a of the ejection mechanism 31 does not rotate. . As described above, in the present embodiment, the finishing width defect is detected by the dimension inspection unit, and the trimming book presence / absence detecting unit determines whether the trimming book 10 exists at the predetermined position P, and the trimming book 10 exists. Only at this time, the discharge mechanism 31 is operated to discharge the trimming book 10 ′ having a defective finishing width to the discharge chute 32.
[0024]
Subsequently, the present embodiment will be described with reference to FIG. The cutting failure detecting device 20 of the present embodiment includes a control unit 40. As described above, the control means 40 outputs the defective trimming book based on the finishing width defective detection signal from the finishing width defective detecting means and the trimming present signal from the trimming actual presence detecting means. (Ejecting Means) An ejecting operation judging means 41 for outputting a defective article ejection control signal for ejecting from the ejector 31 is provided. The discharge operation determining means 41 is composed of an AND circuit (logical product operation circuit) or a logical product operation means, and the discharge operation is not performed until the finishing width failure signal and the signal indicating the presence or absence of the trimming book from the trimming book presence / absence detecting means are input. The determination unit 41 outputs a defective product discharge control signal to drive the discharge unit 31, so that a trimmed book with a defective finishing width can be reliably discharged.
[0025]
Further, the control means 40 is provided with a self-monitoring function for determining whether or not the cutting failure detection device 20 can detect the cutting failure. This self-monitoring function is performed when one of the photoelectric sensors 23 to 25 and the photoelectric sensors 26 to 28, which are photoelectric sensors for detecting the finishing width, or one of the cut book presence / absence detection sensors 29 and 30 is in the “ON” state. There is provided an operation time measurement / comparison / determination means 44 for determining whether or not the time indicated by has continued for a predetermined time. The operating time measurement / comparison / determination means 44 determines that the cutting failure detection device 20 detects the finishing width when it is determined that the continuation time of the operating state exceeds the passing time (reference passing time) of the cutting book passing through the predetermined position P. An impossible state can be detected.
[0026]
The cutting main passage time is set by a reference time setting means 42 for setting a reference passage time by a setting switch or the like, and a duration (measurement passage time) of an operation state is measured by an operation time measurement / comparison means 44. When the measured transit time exceeds the trimming pass time, an output unit 45 of the stop signal output unit 43 outputs an abnormal stop signal to the bookbinding machine 34. Further, by making the alarm 46 sound in response to a stop signal from the output means 45, an abnormality can be notified to the entire bookbinding line.
[0027]
The control means 40 can be implemented by ordinary sequential control, or of course, may be computer-controlled.
[0028]
Next, the operation of the present embodiment will be described based on the processing flow of FIG. The sheet is sent to a predetermined position P from the cutting machine 21 at a predetermined timing. First, in step S1, when the finishing width defect detecting unit detects a finishing width defect of a trimming book, the cutting defect detecting device 20 proceeds to step S2, and the trimming book presence / absence detecting unit determines that there is no trimming book at the predetermined position P. If this is detected, the process proceeds to step S3, where the discharge mechanism (discharge means) 31 is driven to discharge the defective cut book 10 '. After the ejection of the defective trimmed book 10 'is completed in step S5, the process proceeds to step S6, where it is determined whether or not the bookbinding is completed. If the process is continued, the process returns to step S1. On the other hand, in step S1, when the trimming width detecting unit detects that the trimming book 10 at the predetermined position P has the specified finishing width, the process proceeds to step S4, where the sheet is sent to the subsequent conveying unit 33 by the conveying unit 22, and the process returns to step S1. The finishing width of the next cut book is detected. If the trimming book 10 cannot be detected in step S2, the process proceeds to step S7, where the finishing width defect detecting means determines from the cutting piece 18 that the finishing width defect is erroneously recognized, and the discharge mechanism 31 is activated. Instead, the process proceeds to step S8. In step S8, when it is determined that the continuous operation time of the photoelectric sensor that has detected the cut piece 18 or the like exceeds the reference passage time, a stop signal for stopping the bookbinding machine 34 is output. If it is determined that the operation is a temporary operation, the process returns to step S1, and the finishing width of the new cutting book 10 is detected.
[0029]
In the present embodiment, the dimension detecting means is composed of a plurality of transmission type photoelectric sensors, and the cut book presence detecting means may be any of a photoelectric sensor, an ultrasonic sensor, or a pattern matching sensor. The (camera) may be installed at one place above a predetermined position where the cut book is sent. In addition, the pattern matching sensor can determine whether or not the trimming book is accurately conveyed to a predetermined position. When a trimming piece is photographed, the presence or absence of trimming is displayed. Primary stop, etc. can be performed.
[0030]
【The invention's effect】
As described above, according to the present invention, even if the sensor for detecting the finishing width of the trimming book malfunctions due to the trimming piece, it detects whether or not the trimming book exists at a predetermined position. However, there is an advantage that it is possible to prevent the occurrence of a jam due to malfunction of the cut book in the conveyance path due to malfunction, and there is an advantage that the productivity of bookbinding is not reduced.
[0031]
Further, according to the present invention, when it is determined that the operation state of any one of the size detection sensor and the cut book presence / absence detection sensor has passed the reference passage time or more, an abnormality has occurred in the cut defect detection device. It outputs the stop signal by judging what it is, stops the operation of the bookbinding machine, and has the advantage of reducing the number of printing and cutting books that become defective due to the occurrence of jams by interrupting the transport path of printing and cutting books. Since the worker can be notified of the abnormality by an alarm or the like, there is an advantage that the worker at each place can take the best countermeasures.
[Brief description of the drawings]
FIG. 1 is a schematic side view of the present embodiment and a cutting machine.
FIG. 2 is a schematic plan view of the embodiment.
FIG. 3 is a schematic diagram of a main part for describing detection of a cut piece by the cutting defect detection device according to the embodiment.
FIG. 4 is a schematic diagram of a main part for describing detection of a cut piece by the cutting defect detection device according to the embodiment.
FIG. 5 is a block diagram illustrating the present embodiment.
FIG. 6 is a diagram illustrating an example of a processing flow according to the present embodiment.
FIG. 7 is a schematic diagram of a main part for describing a conventional dimension discriminating apparatus.
FIG. 8 is a schematic view of a main part for explaining a conventional cut and defective product detection apparatus.
FIG. 9 is a schematic view of a main part for explaining a conventional defective cutting size inspection machine.
FIG. 10 is a main part schematic side view showing a state in which a jam has occurred in a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Cutting book 10 'Defective cutting book 20 Cutting defect detecting apparatus 21 Cutting machine 22 Conveyor (conveyance means)
23 to 25, 26 to 28 Photoelectric sensors 23 'to 25', 26 'to 28' for finishing width detection Light sources 29, 30 Cutting book presence / absence detection sensor 31 Discharge mechanism (discharge means)
31a discharge claw 32 discharge chute 33 conveyor (transportation means)
34 bookbinding machine 41 discharge operation determination means 42 reference time setting means 43 stop signal output means 44 operation time measurement / comparison determination means 45 output means 46 alarm

Claims (3)

Conveying means for conveying the cut book to a predetermined position;
Dimension detecting means for detecting the finishing width of the cut book conveyed to a predetermined position,
Cutting book presence detecting means for detecting the presence or absence of a cutting book at a predetermined position,
A discharge unit that discharges the trimmed book with a defective finish width when the dimension detecting unit detects a trimmed width defect of the trimmed book and the trimmed book presence / absence detecting unit determines that the trimmed book is present. Cutting defect detection device. The size detection unit and the cut book presence / absence detection unit include a sensor, and include a stop signal output unit that outputs a stop signal for stopping operation when any one of the plurality of sensors is in an operating state for a predetermined time. The cutting defect detecting device according to claim 1. The stop signal output means in the cutting failure detection device according to claim 2, wherein an operation time of any one of the plurality of sensors is determined as to whether or not an operation state of the plurality of sensors is continuous for a passage time or more when a cutting book passes a predetermined position. A cutting defect detecting device, characterized in that it is a means for outputting a stop signal when it is determined by the measuring means that the operating state has been continuously continued for a passage time or longer.

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