JP2007254006A - Sheet bundle transferring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet bundle transferring system which prevents a poor packaging from being caused by a displaced bundle produced in a sheet bundle, and accomplishes a high yield without making any substantial long tact time. <P>SOLUTION: There is provided a sheet bundle transferring system comprising: a size measurement part for measuring a size extending along a predetermined direction of the sheet bundle to be transferred in a predetermined direction; and a discriminating part for comparing a measured size where the sheet bundle is measured in the size measuring part with a predetermined reference size and discriminating whether the sheet bundle is acceptable, to be amended, or unacceptable, on the basis of a difference between the measured size and the reference size. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sheet bundle conveyance system, and in particular, a sheet bundle conveyance system capable of preventing a defective product having a large deviation between sheet materials from being conveyed to a packaging process without extending a tact time in a sheet bundle packaging line. About.

  The lithographic printing plates are accumulated in the thickness direction by an accumulating device to form a lithographic printing plate bundle, conveyed by various conveying devices such as a belt conveyor and a roller conveyor, and packaged in a packaging process.

  However, in the laser exposure type lithographic printing plate that has been widely used in recent years, the plate-making surface is slippery, and it is accumulated without inserting interleaving paper between the lithographic printing plate bundles, Bundle misalignment is likely to occur when the planographic printing plates are shifted during transportation.

  When the lithographic printing plate bundle having the bundle deviation is sent as it is to the packaging process and packaged, defective packaging such as jamming or perforation that opens a hole in the interior paper occurs.

  Therefore, it is necessary to determine whether or not the lithographic printing plates are correctly laminated before the packaging process, and to discharge the lithographic printing plate bundle having the bundle deviation from the line.

As an apparatus for determining whether or not a planographic printing plate bundle is correctly stacked, there is an integrated discharge apparatus described in Patent Document 1, for example.
Japanese Patent Laid-Open No. 9-073324

  However, the stacking / discharging device measures the weight of a stack in which a predetermined number of paperboards are stacked, compares the measured weight with a predetermined weight setting value, and determines the stack as a good product and a defective product. The defective products are discharged out of the line.

  However, among lithographic printing plate bundles, even lithographic printing plate bundles with bundle deviations are not only those with large bundle deviations but also those with small bundle deviations that can be transferred to the packaging process if corrected.

  Therefore, it is unreasonable to discharge all the lithographic printing plate bundles in which the bundle deviation has occurred to the outside of the line as defective products.

  However, if all the planographic printing plate bundles are corrected for misalignment and sent to the packaging process, the tact time becomes too long. In addition, since the correction width of the bundle deviation is excessive in the lithographic printing plate bundle having a large bundle deviation, there is a high possibility that the plate making surface is damaged.

  The present invention has been made to solve the above problem, and is a sheet bundle conveying system for sending a sheet bundle in which sheet materials such as lithographic printing plates are laminated to a packaging process, and is caused by a bundle deviation caused in the sheet bundle. An object of the present invention is to provide an apparatus capable of preventing the occurrence of defective packaging and achieving a high yield without greatly extending the tact time.

  According to the first aspect of the present invention, a dimension measuring unit that measures a dimension along a predetermined direction of a sheet bundle conveyed in a predetermined direction, and a measurement dimension obtained by measuring the sheet bundle in the dimension measuring unit are predetermined. And a determination unit that determines whether the sheet bundle belongs to a non-defective product, a correction-needed product, or a defective product based on a difference between the measured dimension and the reference dimension. The present invention relates to a sheet bundle conveying system.

  In the sheet bundle conveying system, it is determined whether the sheet bundle belongs to a non-defective product, a product requiring correction, or a defective product based on the difference between the measured dimension and the reference dimension.

  Therefore, when the non-defective product is left as it is, the dimensional deviation of the product requiring correction is corrected and then transferred to a subsequent process, for example, a packaging process, and then all the sheet bundle dimensions are corrected and then transferred to the subsequent process. The tact time can be shortened in comparison. In addition, for sheet bundles with large dimensional deviations, it is determined that the sheet is defective and discharged out of the line. By correcting the dimensional deviation, the sheet material is broken or the surface is rubbed and damaged. It can prevent effectively that it mixes in a post process.

  According to a second aspect of the present invention, in the sheet bundle whose dimensions are measured by the dimension measuring unit, the difference between the measured dimension and the reference dimension is equal to or less than a predetermined first allowable value. Is a non-defective product, a product that needs to be corrected when it is less than or equal to the second tolerance value that is greater than the first tolerance value and greater than the first tolerance value, and a defective product that is greater than the second tolerance value. The sheet bundle conveyance system according to claim 1 for determination.

  In the sheet bundle conveyance system, whether the sheet bundle belongs to a non-defective product, a product requiring correction, or a defective product based on the relationship between the difference between the measurement dimension and the reference dimension and the first and second tolerances. Judgment is being made.

  Therefore, by appropriately setting the first and second tolerance values, it is possible to effectively prevent the sheet bundle having a large dimensional deviation from being mixed into the subsequent process so as to cause a defect in the subsequent process, while improving the yield and tact time. Time reduction can be prevented.

  According to a third aspect of the present invention, the dimension of the sheet bundle measured by the dimension measuring unit is a sheet bundle length that is a dimension along the conveyance direction of the sheet bundle, and a direction orthogonal to the conveyance direction of the sheet bundle. In the determination unit, the sheet bundle length is compared with a reference length that is a reference dimension along a sheet bundle conveyance direction, and the sheet bundle width is a dimension along the sheet bundle width. The present invention relates to a sheet bundle conveyance system according to claim 1 or 2, which is compared with a reference width that is a reference dimension along a direction orthogonal to the sheet bundle conveyance direction.

  A fourth aspect of the present invention relates to the sheet bundle conveying system according to the third aspect, wherein both the sheet bundle length and the sheet bundle width are measured in the dimension measuring unit.

  In the sheet bundle conveying system, since one or both of the sheet bundle length and the sheet bundle width are measured as the dimensions of the sheet bundle, the dimensions can be measured while conveying the sheet bundle. Accordingly, it is not necessary to temporarily stop the sheet bundle in order to measure the dimensions, so that the tact time can be further shortened.

  According to a fifth aspect of the invention, the dimension measuring unit measures the projection length and the projection width of the sheet bundle on a plane parallel to the conveyance path of the sheet bundle, and based on the measured projection length and projection width. The sheet bundle conveying system according to claim 3, wherein the sheet bundle length and the sheet bundle width are obtained.

  In the sheet bundle conveyance system, the projection length and the projection width of the sheet bundle are dimensions obtained by projecting the sheet bundle on a plane parallel to the conveyance path of the sheet bundle, and thus the sheet bundle length and the sheet bundle width, respectively. be equivalent to.

  The projected length of the sheet bundle is the time when the sheet bundle blocks the light when the sheet bundle is conveyed at a constant speed while applying light to the sheet bundle from a direction perpendicular to the surface of the sheet bundle. And the product of the conveyance speed. On the other hand, the projected width of the sheet bundle is such that the sheet bundle blocks the light when the sheet bundle is conveyed at a constant speed while applying light to the sheet bundle from a direction perpendicular to the surface of the sheet bundle. Calculated as the width.

  According to a sixth aspect of the present invention, in the determination unit, the first allowable value and the second allowable value are determined for each of a length direction and a width direction of the sheet bundle, and the determination unit When the difference from the reference length is larger than the first allowable value and equal to or less than the second allowable value, it is determined that the product needs to be corrected for cut deviation requiring correction in the length direction, and the sheet bundle width and the reference width are determined. The sheet bundle according to any one of claims 3 to 5, wherein when the difference is larger than the first allowable value and equal to or smaller than the second allowable value, the sheet bundle is determined to be a width deviation correction product requiring correction in the width direction. Concerning the transport system.

  The deviation of the sheet material generated in the sheet bundle is divided into a cut deviation in the length direction and a width deviation in the width direction.

  In the sheet bundle conveyance system, the sheet bundle is classified as either a cut required deviation correction product or a required width deviation correction product according to the type of deviation generated in the sheet bundle. Minor corrections are possible.

  The invention according to claim 7 includes a classification correction unit that sorts and corrects a sheet bundle based on a determination result in the determination unit, and the separation correction unit includes a sheet bundle that is determined to be non-defective by the determination unit. Is transferred to the subsequent process as it is, and for the sheet bundle determined to be a correction product in the determination unit, the deviation between the sheet materials is corrected and transferred to the subsequent process, and the sheet bundle determined to be a defective product in the determination unit. Relates to the sheet bundle conveying system according to any one of claims 1 to 6, wherein the sheet bundle is discharged out of the line.

  In the sheet bundle transport system, the sheet bundle is directly sent to the packaging process based on the determination made by the determination unit, or the deviation between the sheet materials is corrected and sent to the packaging process, or the product is lined as a defective product. Decide whether to discharge outside.

  Therefore, the yield of the sheet bundle to be sent to the packaging process can be improved as compared with the case where all the sheet bundles are corrected, and the tact time can be shortened.

  The invention according to claim 8 corrects the deviation in the length direction between the sheet materials for the sheet bundle that is determined to be a cut required correction product in the determination unit in the classification correction unit, and in the determination unit The sheet bundle conveyance system according to claim 7, wherein the sheet bundle determined to be a width deviation correction product is corrected for a deviation in a width direction between sheet materials and then sent to a packaging process.

  In the sheet bundle conveyance system, in the sheet bundle conveyance system, since one or both of the sheet bundle length and the sheet bundle width are measured as the sheet bundle dimensions, the dimensions are measured while conveying the sheet bundle. It is possible.

  Therefore, there is no need to temporarily stop the sheet bundle in order to measure the dimensions.

  Further, since the sorting correction unit corrects the shift in the length direction and the shift in the width direction between the sheet materials according to the type of shift generated in the sheet bundle, the grain according to the type of shift generated. Minor corrections are possible.

  The invention according to claim 9 relates to the sheet bundle conveyance system according to any one of claims 1 to 8, wherein the dimension measuring unit optically measures the length and width of the sheet bundle.

  In the sheet bundle conveyance system, since the length and width of the sheet bundle are optically measured by the dimension measuring unit, the dimension of the sheet bundle can be measured in a non-contact manner.

  Accordingly, it is possible to prevent the sheet bundle from being displaced during the dimension measurement.

  As described above, according to the present invention, it is possible to prevent defective packaging due to a bundle shift occurring in a sheet bundle, and to send the sheet bundle to the packaging process with a high yield without greatly extending the tact time. A sheet bundle conveying system capable of performing the above is provided.

1. Embodiment 1
A planographic printing plate bundle sorting and conveying system which is an example of a sheet bundle conveying system according to the present invention will be described below.

  As shown in FIG. 1, the planographic printing plate bundle sorting and conveying system 1000 according to the first embodiment is carried in by a carry-in conveyor 2 that carries in a planographic printing plate bundle P that is an example of a sheet bundle in the present invention, and a carry-in conveyor 2. A width measuring sensor 4 for optically measuring the width of the lithographic printing plate bundle P, and an optical for optically detecting the lithographic printing plate bundle P provided at the center of the width measuring sensor 4 and passing through the width measuring sensor 4 Based on the measurement results of the sensor 6, the encoder 8 provided on the roller on the downstream side of the carry-in conveyor 2, the width measurement sensor 4, the optical sensor 6, and the encoder 8, the lithographic printing plate bundle P is determined to be a non-defective product and a correction required product. A separation conveyor 10 for separating into NG products, an NG product conveyor 12 for transporting the NG products sorted by the separation conveyor 10 to an NG stock space (not shown), and a separation conveyor 10 It is located between the non-defective conveyor 14 that conveys the sorted non-defective products along the conveying direction a toward the downstream packaging device, and the separation conveyor 10 and the non-defective conveyor 14 that need to be sorted. A shift correcting conveyor 16 for correcting a dimensional shift of the product and a central control computer 100 are provided. The width measuring sensor 4, the optical sensor 6, and the encoder 8 are the dimension measuring unit in the present invention, the central control computer 100 is the determining unit in the present invention, the separation conveyor 10, the NG product conveyor 12, the non-defective product carrying conveyor 14, and the shift. The correction conveyor 16 corresponds to the classification correction unit in the present invention.

  The central control computer 100 receives the measurement results from the width measurement sensor 4, the optical sensor 6, and the encoder 8, and the lithographic printing plate bundle P is a non-defective product, a product requiring correction, or an NG product based on the input results. It has a function to determine which corresponds to the above, and to control the separation conveyor 10, the NG product conveyor 12, the non-defective product delivery conveyor 14, and the misalignment correction conveyor 16 based on the determination result.

  As shown in FIG. 2, the width measuring sensor 4 includes a pair of portal sensors 42 and 44 that are disposed across the conveyance path of the planographic printing plate bundle P. Each of the portal sensors 42 and 44 has a C-shaped configuration that opens toward the transport path of the planographic printing plate bundle P. Emitting portions 42A and 44A for emitting measurement light toward the conveyance path protrude from the upper ends of the portal sensors 42 and 44 toward the conveyance path, respectively, and are emitted from the emission portions 42A and 44A at the lower end. Light receiving portions 42B and 44B that receive measurement light are provided so as to face the emitting portions 42A and 44B with the conveyance path interposed therebetween.

  As shown in FIG. 3A, the optical sensor 6 includes a light emitting unit that emits measurement light toward the transport path of the planographic printing plate bundle P and a light receiving unit that receives the measurement light emitted from the light emitting unit. Prepare. Then, when the lithographic printing plate bundle P passes through the width measuring sensor 4, as shown in FIG. 3B, the measurement light measured from the light emitting part is reflected by the lithographic printing plate bundle P and received by the light receiving part. , Become on. Here, since the lithographic printing plate bundle P is transported at a constant speed along the transport direction a by the carry-in conveyor 2, the interval between pulses generated by the encoder 8 is also constant. Therefore, the projection length of the lithographic printing plate bundle P is obtained from the number of pulses and the pulse interval when the optical sensor 6 is on.

  As shown in FIGS. 1 and 4, the separation conveyor 10 is disposed at a constant interval, and a transport roller 10 </ b> A that transports the lithographic printing plate bundle P along the transport direction “a” and between two adjacent transport rollers 10 </ b> A. Is provided with a belt conveyor 10B. The belt conveyor 10B is provided so as to be movable up and down with respect to the transport roller 10A as shown in FIG. 4A, and rotates in the direction of the arrow b as shown in FIG. 4B. When transporting the lithographic printing plate bundle P toward the misalignment correcting conveyor 16, the belt conveyor 10B is in a lowered position as shown by the solid line in FIG. It is lower than the conveying surface of 10A. On the other hand, when the planographic printing plate bundle P is transported toward the NG product conveyor 12, the belt conveyor 10B is lifted so that the transport surface is higher than the transport surface of the transport roller 10A, as indicated by a two-dot chain line. . Here, since the conveyance direction b of the belt conveyor 10B is the direction toward the NG product conveyor 12 as shown in FIG. 1, when the belt conveyor 10B rises, the planographic printing plate bundle P is conveyed toward the MG product conveyor 2. Is done.

  As shown in FIGS. 1 and 5, the misalignment correcting conveyor 16 includes a roller conveyor 16A for conveying the lithographic printing plate bundle P along the conveying direction a, and an abutting pad provided on the downstream side above the roller conveyor 16A. A transport path a of the lithographic printing plate bundle P is provided between 16B, a pusher 16C provided to face the abutting pad 16B on the upstream side of the abutting pad 16B, and the abutting pad 16B and the pusher 16C. Pushers 16D and 16E provided so as to be opposed to each other.

  As shown in FIG. 5, the pushers 16C, 16D, and 16E are each provided with an air cylinder 17 and a pusher plate 18 positioned at the tip of the air cylinder. Each of the air cylinders 17 is erected on the base 19. The base 19 is provided with one pair of linear bushings 20.

  A pair of guide bars 18A are erected on the back surface of the pusher plate 18, that is, on the surface opposite to the side in contact with the planographic printing plate bundle P. The guide bar 18A is inserted into the linear bush 20 and guides the pusher plate 18 in a direction in which the pusher plate 18 approaches or separates from the planographic printing plate bundle P.

  The pushers 16C, 16D, and 16E each include a support plate 21 that supports the base 19 so as to be movable up and down. The support plate 21 is provided in parallel to the pusher 18. Therefore, the support plate 21 is provided so as to be opposed to the abutting pad 18B in the pusher 16C, and is provided so as to be opposed to the pushers 16D and 16E with the conveyance path a of the planographic printing plate bundle P interposed therebetween. A ball screw 23 is provided above each support plate 21, and a ball nut 22 that is screwed into the ball screw 23 is provided at the upper end of the support plate 21. Each of the ball screws 23 is provided horizontally, and in the pusher 16C, the ball screw 23 is provided in parallel with the transport direction a of the planographic printing plate bundle P in the roller conveyor 16A, and in the pusher 16D and 16E in the transport direction a. It is provided in a direction orthogonal to the direction. A motor 24 is provided at one end of the ball screw 23. When the ball screw 23 is rotated by the motor 24, the ball nut 22 and the support plate 21 move along the ball screw 23, and the pushers 16C, 16D, and 16E also move along the direction of the ball screw 23. .

  A pair of elevating linear guideways 25 is provided between the support plate 21 and the base. The support plate 21 is provided with rails 25A of the linear guideway 25 for raising and lowering along the vertical direction, and the base 19 is provided with blocks 25B that engage with the rails 25A and move in the vertical direction. The support plate 21 is also provided with an elevating air cylinder 26 for elevating the base 19.

  The abutting pad 16B and the pushers 16C, 16D, and 16E are provided at the same height and can be moved up and down. Further, the pushers 16D and 16E can be brought close to and separated from each other according to the width of the planographic printing plate bundle P. Similarly, the pusher 16C can adjust the distance from the abutting pad 16B according to the length of the planographic printing plate bundle P. The abutting pad 16B and the pushers 16C, 16D, and 16E are normally in a state of being lifted so that there is no support for the passage of the lithographic printing plate bundle P, and only when correcting the dimensional deviation of the lithographic printing plate bundle P It descends on the conveyor 16A.

  Hereinafter, the operation of the planographic printing plate bundle sorting and conveying system 1000 will be described.

  The width of the planographic printing plate bundle P carried into the planographic printing plate bundle sorting and conveying system 1000 by the carry-in conveyor 2 is measured by passing through the width measuring sensor 4, and at the same time, the length is measured by the optical sensor 6. The lithographic printing plate bundle P that has passed through the width measuring sensor 4 is carried into the sorting conveyor 10, and the width and length of the lithographic printing plate bundle P measured by the width measuring sensor 4 and the optical sensor 6 at the same time are determined by the central control computer 100. Is input.

  The central control computer 100 compares the input length and width with the reference length and reference width stored in advance, and determines the difference. Then, it is determined whether or not the difference ΔL between the measured length value and the reference length and the difference ΔW between the measured width value and the reference width are smaller than the second allowable value. Here, the second allowable value is that when the planographic printing plate bundle P is corrected in the width direction and the length direction, the plate-making surface of the planographic printing plate constituting the planographic printing plate bundle P is damaged, or the planographic printing plate It is the maximum difference ΔL and ΔW that does not cause a risk of bending, and in the example of the first embodiment, both the length and the width are set to 5 mm.

  When at least one of the difference ΔL and the difference ΔW is larger than the second allowable value, the belt conveyor 10B is raised in the separation conveyor 10 according to an instruction from the central control computer 100. Here, since the belt conveyor 10B rotates in the direction of the arrow b as described above, the planographic printing plate bundle P is conveyed toward the NG product conveyor 12, and is discharged to the NG product stock space by the NG product conveyor 12. The

  When both the difference ΔL and the difference ΔW are equal to or smaller than the second allowable value, the conveying roller 10A rotates in the state where the belt conveyor 10B is lowered in the separation conveyor 10, and the planographic printing plate bundle P is moved in the direction of the arrow a. Then, it is conveyed toward the misalignment correcting conveyor 16. The central control computer 100 further determines whether or not the difference ΔL and the difference ΔW are equal to or less than a first allowable value. Here, the first allowable value is the maximum difference ΔL and ΔW that can determine that the lithographic printing plate bundle P is a non-defective product. In the example of the first embodiment, both the length and the width are set to 1 mm.

  When at least one of the difference ΔL and the difference ΔW is larger than the first allowable value, the abutting pad 16B is first lowered onto the roller conveyor 16A according to an instruction from the central control computer 100. When the tip of the lithographic printing plate bundle P conveyed on the roller conveyor 16A comes into contact with the abutting pad 16B, the elevating air cylinder 26 extends in the pushers 16C to 16E, and the base 19 moves over the support plate 21. It descends toward the roller conveyor 16A.

  When the difference ΔL is larger than the first allowable value, the air cylinder 17 extends in the pusher 16D and the pusher 16E and the pusher plate 18 is moved to the planographic printing plate bundle P so as not to cause a deviation in the width direction during correction. It contacts the side edge in the longitudinal direction. Then, the air cylinder 17 repeatedly expands and contracts in the pusher 16C, and the pusher plate 18 is repeatedly brought into contact with the side edge of the planographic printing plate bundle P opposite to the side in contact with the abutting pad 16B. As a result, for example, in the planographic printing plate bundle P, the shift generated on the side surface as shown in FIG. 6B is eliminated, and is corrected to the vertical side surface as shown in FIG. Thereby, the shift | offset | difference of a length direction is corrected.

  On the other hand, when the difference ΔW is larger than the first allowable value, the air cylinder 17 expands in the pusher 16C and the abutting pad 16B of the lithographic printing plate bundle P is prevented so that the displacement in the length direction does not occur during correction. The pusher plate 18 comes into contact with the side edge opposite to the side in contact with the pusher plate 18. In the pushers 16D and 16E, the air cylinder 17 repeatedly expands and contracts, the pusher plate 18 is repeatedly brought into contact with a pair of side edges in the longitudinal direction of the planographic printing plate bundle P, and the planographic printing plate is displaced in the width direction. To correct.

  Furthermore, when both of the difference ΔL and the difference ΔW are larger than the first allowable value, the larger deviation is corrected after correcting the smaller deviation of the deviations in the length direction and the width direction.

  When the shift in the length direction and the width direction is corrected in this way, the abutting pad 16B and the pushers 16C to 16E are raised, and the lithographic printing plate bundle P is carried out toward the non-defective product carry-out conveyor 14.

  The planographic printing plate bundle P carried out to the non-defective product carrying conveyor 14 is carried out toward the packaging process.

  When both the difference ΔL and the difference ΔW are smaller than the first allowable value, the planographic plate 16B and the pushers 16C to 16E are raised from the roller conveyor 16A in accordance with an instruction from the central control computer 100. The printing plate bundle P is carried out toward the non-defective product carrying conveyor 14 by the roller conveyor 16A.

  The planographic printing plate bundle P carried out to the non-defective product carrying conveyor 14 is carried out toward the packaging process.

  In the lithographic printing plate bundle sorting and conveying system 1000, the length and width of the lithographic printing plate bundle P are measured, the measured values of the length and width, and the reference length and reference width stored in the central control computer 100 in advance. When the difference is larger than the second tolerance (5 mm), the product is discharged out of the line as an NG product, and the difference is larger than the first tolerance (1 mm) and the second tolerance (5 mm). When it is below, after correcting the shift by the shift correcting conveyor 16, it is carried out to the packaging process. And when the said difference is below a 1st tolerance (1 mm), it carries out to a packaging process, without correct | amending deviation by the deviation correction conveyor 16. FIG.

  Therefore, the yield of the lithographic printing plate bundle P carried out to the packaging process can be increased without greatly extending the tact time, and the lithographic printing plate bundle P having a large deviation can be sent to the packaging process. Absent. Therefore, as shown in FIG. 6C, it is possible to avoid the trouble that the interior paper is damaged after packaging due to the deviation generated in the lithographic printing plate bundle P.

  Further, since the width and length of the lithographic printing plate bundle P are optically measured by the width measuring sensor 4 and the optical sensor 6, the width and length are measured in a non-contact manner. Therefore, the lithographic printing plate bundle P does not newly shift due to the measurement of the width and length.

  The sheet bundle conveying system of the present invention is not only a lithographic printing plate, but also laminates various sheet materials such as various metal sheets such as aluminum plates, painted steel plates, and stainless steel plates, plastic sheets, and sheets in the thickness direction. The sheet bundle can be suitably used in the conveyance and packaging process.

FIG. 1 is a plan view showing an outline of a configuration of a planographic printing plate bundle sorting and conveying system according to the first embodiment. FIG. 2 is an enlarged front view showing an outline of a configuration of a width measurement sensor provided in the planographic printing plate bundle sorting and conveying system shown in FIG. FIG. 3 is an enlarged view showing an optical sensor included in the planographic printing plate bundle sorting and conveying system shown in FIG. FIG. 4 is a partial perspective view showing a configuration of a sorting conveyor provided in the planographic printing plate bundle sorting and conveying system shown in FIG. FIG. 5 is an enlarged perspective view showing a configuration of a misalignment correcting conveyor provided in the planographic printing plate bundle sorting and conveying system shown in FIG. FIG. 6 is an explanatory diagram showing the state of the lithographic printing plate bundle P that is separated and transported by the lithographic printing plate bundle sorting and conveying system shown in FIG. 1 and the damage of the interior paper caused by the displacement after packaging. .

Explanation of symbols

2 Carrying Conveyor 4 Width Measurement Sensor 6 Optical Sensor 8 Encoder 10 Sorting Conveyor 10A Conveying Roller 10B Belt Conveyor 12 NG Product Conveyor 14 Good Product Carrying Conveyor 16 Deviation Correcting Conveyor 16A Roller Conveyor 16B Pad 16C Pusher 16D Pusher 16E Pusher 17 Air Cylinder 18 Pad 42 Gate-type sensor 42A Emitting unit 42B Light-receiving unit 44 Gate-type sensor 44A Emission unit 44B Light-receiving unit 100 Central control computer 1000 Planographic printing plate bundle sorting and conveying system

Claims (9)

A dimension measuring unit for measuring a dimension along a predetermined direction of a sheet bundle conveyed in a predetermined direction;
Comparing a measurement dimension obtained by measuring the sheet bundle in the dimension measurement unit with a predetermined reference dimension, and based on the difference between the measurement dimension and the reference dimension, regarding the sheet bundle, a non-defective product, a correction required product, a defective product A sheet bundle conveying system comprising: a determination unit that determines which of the sheet bundles.   When the difference between the measured dimension and the reference dimension is less than or equal to a predetermined first allowable value for the sheet bundle whose dimensions are measured by the dimension measuring unit, 2. The sheet according to claim 1, wherein the sheet is determined to be a correction-required product when it is greater than a value and less than or equal to a second tolerance value that is greater than the first tolerance value, and is defective when greater than the second tolerance value. Bundle transport system. The dimension of the sheet bundle measured by the dimension measuring unit is a sheet bundle length that is a dimension along the conveyance direction of the sheet bundle, and a sheet bundle width that is a dimension along a direction orthogonal to the conveyance direction of the sheet bundle. At least one of the
In the determination unit, the sheet bundle length is compared with a reference length which is a reference dimension along the sheet bundle conveyance direction, and the sheet bundle width is a reference dimension along a direction perpendicular to the sheet bundle conveyance direction. The sheet bundle conveying system according to claim 1 or 2, wherein the sheet bundle conveying system is compared with a reference width.   The sheet bundle conveying system according to claim 3, wherein the dimension measuring unit measures both the sheet bundle length and the sheet bundle width.   The dimension measuring unit measures a projection length and a projection width of the sheet bundle on a plane parallel to a conveyance path of the sheet bundle, and a sheet bundle length and a sheet bundle width based on the measured projection length and projection width. The sheet bundle conveying system according to claim 3 or 4, wherein: In the determination unit, the first tolerance value and the second tolerance value are determined for each of the length direction and the width direction of the sheet bundle,
When the difference between the sheet bundle length and the reference length is greater than the first allowable value and less than or equal to the second allowable value, the determination unit determines that the product needs to be corrected for cut deviation that requires correction in the length direction. 6. When the difference between the sheet bundle width and the reference width is larger than the first allowable value and equal to or smaller than the second allowable value, it is determined that the width deviation correction product requires correction in the width direction. The sheet bundle conveyance system according to any one of the above. A sorting correction unit that sorts and corrects a sheet bundle based on a determination result in the determination unit,
In the sorting correction unit, the sheet bundle determined to be non-defective in the determination unit is directly passed to a subsequent process, and the deviation between the sheet materials is corrected for the sheet bundle determined in the determination unit to be corrected. The sheet bundle conveying system according to any one of claims 1 to 6, wherein the sheet bundle determined to be defective by the determination unit is discharged out of the line while being sent to a subsequent process.   The separation correction unit corrects the deviation in the length direction between the sheet materials for the sheet bundle that is determined as the required cut deviation correction product in the determination unit, and is determined as the required width deviation correction product in the determination unit. The sheet bundle conveyance system according to claim 7, wherein the sheet bundle is rotated to a subsequent process after correcting a deviation in a width direction between the sheet materials.   The sheet bundle conveyance system according to any one of claims 1 to 8, wherein the dimension measuring unit optically measures a length and a width of the sheet bundle.

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