JP2013082546A - Defective sheet-like product removal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a defective sheet-like product removal device that removes a defective sheet-like product determined to be defective from a conveyance line so as to be easily and immediately visually checked by an operator.SOLUTION: The defective sheet-like product removal device 1 includes: a conveyance means 13 for conveying a sheet-like product; removal means 14 and 15 for removing the sheet-like product determined to be defective by a determination means, from the conveyance means 13; and an accumulation means 16 in which the sheet-like products removed from the removal means 14 and 15 are accumulated. The removal means 14 and 15 comprise a flip-up mechanism 14 which flips up the sheet-like product determined to be defective, when conveyed by the conveyance means 13, and a removal mechanism 15 which blows off the flipped-up sheet-like product to a downstream side. The accumulation means 16 is arranged downstream of the removal mechanism 15, and arranged above the conveyance means 13. The sheet-like product determined to be non-defective is conveyed below the accumulation means 16.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for rejecting defective sheet-like products used in a printing machine for corrugated cardboard sheets, and to reject defective sheet-like products such as cardboard sheets from a conveying line when they are defective. .

  Some printing machines for corrugated cardboard sheets are provided with an exclusion device that removes defective corrugated cardboard sheets from the conveyance line. For example, a sheet rejection apparatus for a printing press disclosed in Japanese Patent Application Laid-Open No. 63-208457 includes a reading device that reads a barcode printed on a cardboard, a determination device that determines the quality of barcode printing, and a determination When the apparatus determines that the barcode printing is defective, the apparatus includes a sorting device that discharges defective cardboard sheets from the conveyance line. Japanese Patent Application Laid-Open No. 2004-338006 discloses a quality assurance inspection device that photographs a corrugated cardboard sheet to inspect the printing state and excludes the corrugated cardboard sheet determined to be defective from the conveyance line.

  The sorting device included in the sheet rejection apparatus disclosed in Japanese Patent Application Laid-Open No. 63-208457 is such that the lower conveyor and suction conveyor of the sandwich conveyor are swung downward on the conveying line, and the corrugated sheet is formed on the inclined engaging claws. The defective corrugated cardboard sheet is dropped onto a defective product discharge conveyor provided below the conveyance line. In the quality assurance inspection apparatus disclosed in Japanese Patent Application Laid-Open No. 2004-338006, when a flap provided at the front end of a non-defective conveyor rises, a defective cardboard sheet is sent to a defective conveyor provided below the conveyor. Furthermore, it is dropped on the discharge conveyor.

JP-A 63-208457 JP 2004-338006 A

  When determining whether the corrugated cardboard sheet is a non-defective product based on the image data obtained by photographing the corrugated cardboard sheet, and removing the corrugated cardboard determined to be non-defective (that is, defective) from the transport line, the transport line Since it is necessary to prevent a situation in which defective cardboard sheets are mixed with non-defective cardboard sheets accumulated at the end point, the criteria to be satisfied by the corrugated cardboard sheets determined to be non-defective are set strictly. However, as a result, a case where a corrugated cardboard sheet, which is originally a good product, is determined to be defective is likely to occur. For example, when a printed corrugated cardboard sheet is photographed to determine whether the printed state of the corrugated cardboard sheet is good or bad based on the obtained image data, if the cardboard sheet is warped, bent or misaligned during photographing, A non-defective cardboard sheet in a good printing state is determined as a defective product. Therefore, it is necessary for the operator to confirm whether or not the corrugated cardboard sheet determined to be defective is (really) defective. Then, the operator removes the non-defective cardboard sheets determined to be defective in the determination process from the group of cardboard sheets determined to be defective in the determination process, and adds them to the accumulated non-defective cardboard sheet group. There is a need.

  However, when the corrugated cardboard sheet determined to be defective is discharged under the transport line as in the conventional technique described above, it is inconvenient for the operator to visually confirm the corrugated cardboard sheet. The operator cannot confirm the cardboard sheet until the cardboard sheet is taken out from the bottom of the conveyance line by the discharge conveyor for defective products, and the operator needs to crouch to see the cardboard sheet. Although it is possible to incline the discharge conveyor for defective products and move the corrugated cardboard sheet to a position where it is easy for the operator to visually check, the discharge conveyor extends long so as to be orthogonal to the transport line. Such a configuration is not preferable in that it hinders the movement of the worker along the transport line.

  The present invention solves the above-mentioned problem, and conveys a sheet-like product determined as a defective product so that an operator can easily and immediately visually check it without providing a discharge conveyor for defective products. Provided is an apparatus for rejecting defective sheet-like products that is excluded from a line.

  The defective sheet-like product rejection apparatus according to the present invention includes a conveying unit that conveys a sheet-like product, a determination unit that determines the quality of the sheet-like product, and the sheet-like product that is determined to be defective by the determination unit. An apparatus for rejecting defective sheet-like products, comprising: exclusion means for eliminating from the means; and stacking means for collecting the sheet-like products excluded from the exclusion means, wherein the conveying means includes a suction conveyor, and the exclusion The means is a flip-up mechanism that flips up an end portion of the sheet-like product that has been determined to be defective by the determining means on the downstream side in the conveying direction of the conveying means when the sheet-like product is being conveyed by the suction conveyor. And a discharge mechanism for flying the sheet-like product flipped up by the flip-up mechanism to the downstream side, and the stacking means is disposed downstream of the discharge mechanism Together with the said is disposed above the suction conveyor, the sheet-like products that are determined to be non-defective in the determination means is conveyed through the lower side of the stacking means.

  Furthermore, in the defective sheet-like product rejection apparatus according to the present invention, the discharge mechanism includes a plurality of discharge rollers juxtaposed above the suction conveyor, and a discharge on the upstream side of the plurality of discharge rollers in the transport direction of the transport means. A plurality of pressing rollers disposed above the rollers and spaced apart from each other in the width direction of the suction conveyor, and the plurality of discharge rollers are configured such that the discharge rollers on the downstream side are more The sheet-like product that is disposed away from the suction conveyor and is flipped up by the flip-up mechanism is inserted between the plurality of discharge rollers and the plurality of pressing rollers, and the plurality of discharge rollers and the The plurality of pressing rollers are rotationally driven so as to send the inserted sheet-like product to the downstream side. The determined sheet material and is conveyed through the lower of the plurality of discharge rollers.

  Further, in the defective sheet-like product exclusion device of the present invention, the suction conveyor is circulated and includes a plurality of endless belts to which the sheet-like product to be conveyed is adsorbed, A plurality of flaps provided so as to be able to protrude and retract from the upper surfaces of the plurality of endless belts, and between any adjacent endless belts in the plurality of endless belts, One or more flaps are provided.

  In the present invention, the sheet-like product determined to be defective by the determining means is flipped up by the flip-up mechanism while being transported by the suction conveyor, and is discharged downstream using the discharge mechanism. The skipped sheet-like product falls to the accumulation mechanism provided on the downstream side. Since the stacking mechanism is provided above the suction conveyor, the operator can visually confirm the sheet-like products collected in the stacking mechanism without squatting. Moreover, the sheet-like product determined to be non-defective is conveyed through below the stacking means.

  By using a discharge mechanism having a plurality of discharge rollers and a plurality of pressing rollers as described above, it is possible to fly a series of sheet-like products that are flipped up to the downstream side in a substantially similar orbit. In addition, by using the flip-up mechanism provided with a plurality of flaps as described above, a plurality of types of sheet-like products having different dimensions in the width direction of the suction conveyor can be handled by the defective sheet-like product removing device.

It is a side view which shows the outline | summary of the printing machine provided with the defective sheet-like product exclusion apparatus which is an Example of this invention. It is a top view which shows the suction conveyor and the flip-up mechanism of the defective sheet-like product exclusion apparatus which is an Example of this invention. It is an enlarged view which shows the structure of the 1st and 2nd flap of the flip-up mechanism of the defective sheet-like product exclusion apparatus which is an Example of this invention, and those periphery. It is an enlarged view which shows the structure of the 3rd and 4th flap of the flip-up mechanism of the defective sheet-like product exclusion apparatus which is an Example of this invention, and those periphery. FIG. 3 is a partial top view of the defective sheet-shaped product removing apparatus according to the embodiment of the present invention, in which a discharge mechanism and a defective product accumulation mechanism are shown. It is arrow sectional drawing which follows the AA line of FIG. It is sectional drawing which shows the pattern which the 1st flap rose from the state shown in FIG. It is arrow sectional drawing which follows the BB line of FIG. It is a block diagram which shows the control structure of the defective sheet-like product exclusion apparatus which is an Example of this invention. It is a flowchart which shows operation | movement of the defective sheet-like product exclusion apparatus which is an Example of this invention. Each of FIGS. 11a and 11b is an explanatory view schematically showing the operation of the defective sheet-like product eliminating apparatus which is an embodiment of the present invention. 12a and 12b are explanatory views schematically showing the operation of the defective sheet-like product eliminating apparatus which is an embodiment of the present invention. Each of FIGS. 13a and 13b is an explanatory view schematically showing the operation of the defective sheet-like product eliminating apparatus which is an embodiment of the present invention. Each of FIGS. 14a and 14b is an explanatory view schematically showing the operation of the defective sheet-like product eliminating apparatus which is an embodiment of the present invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a corrugated cardboard printing machine provided with a defective sheet-like product eliminating apparatus (1) according to an embodiment of the present invention. The printing machine includes three printing units (2a-c), a sheet feeding unit (3) for supplying corrugated cardboard sheets S one by one to the upstream printing unit (2a), and a downstream printing unit (2c). And a ruled line unit (4) for forming a ruled line on the corrugated cardboard sheet S sent from. In addition, the printing machine includes an intermediate conveyor (5) for sending the corrugated sheet S from the ruled line unit (4) to the defective sheet-like product eliminating device (1) and a good corrugated cardboard sheet S sent from the defective sheet-like product eliminating device (1). And a stacker (9) for stacking and holding. The conveyance path for corrugated cardboard sheets from the sheet feeding unit (3) to the stacker (9) is referred to as a conveyance line. Further, in this specification, the terms “upstream” and “downstream” depend on the flow direction of the conveyance line of the corrugated cardboard sheet S in the printing press, Used when referring to orientation.

  The sheet feeding unit (3) includes a table (21) on which the cardboard sheets S are stacked, a kicker (22) that pushes the cardboard sheets S stacked on the table (21) one by one downstream at a predetermined time interval. And a pair of feed rolls (23a) and (23b) for feeding the cardboard sheet S pushed out from the kicker (22) to the most upstream printing unit (2a). Note that a lead-edge type paper feeding unit may be used as the paper feeding unit (3).

  Each of the three printing units (2a-c) includes a cylindrical plate cylinder (24) around which a printing plate is wound, a receiving roller (25) provided below the plate cylinder (24), and An ink transfer roller (26) for applying ink sent from an ink supply mechanism to the printing plate, and a pair of upper and lower feed rollers (27a) (27b) for feeding the corrugated cardboard sheet S that has passed through the plate cylinder (24) downstream. ). By passing through the plate cylinder (24), the ink applied to the printing plate adheres to the upper surface of the cardboard sheet S. The ink colors of the printing units (2a-c) are different, and three-color printing is performed on the corrugated cardboard sheet S in this printing machine. In this printing machine, the number of printing units and the color of ink printed by each printing unit are not limited. For example, only one printing unit is provided in the printing machine, and monochrome printing is performed on the cardboard sheet S. May be given.

  The ruled line unit (4) includes a pair of upper and lower creaser (28a) (28b), a pair of upper and lower slotter heads (29a) (29b), a creaser (28a) (28b) and a slotter head (29a). ) (29b) and a pair of upper and lower feed rollers (30a) (30b). A plurality of annular protrusions are formed along the circumferential direction on the outer peripheral surface of the lower creaseer (28b), and pass between the creasers (28a) and (28b), so that the downstream paper feed unit ( Ruled lines are formed on the cardboard sheet S sent from 3). A plurality of annular blade portions along the circumferential direction are formed on the outer peripheral surface of the slotter heads (29a) and (29b). By passing through the slotter heads (29a) and (29b), the corrugated cardboard sheet S is grooved. Processing is applied. A double slotter type ruled line unit may be used as the ruled line unit (4) of the printing press.

  The intermediate conveyor (5) is, for example, a suction conveyor, and its downstream end is rotatably supported by the support base (8). As shown in FIG. 1, the intermediate conveyor (5) is normally arranged horizontally to form a conveying line, and the corrugated sheet S sent from the ruled line unit (4) at regular intervals or intervals is excluded from defective sheet-like products. Send to device (1). The cardboard sheet S is fed so as not to overlap with other cardboard sheets S. An imaging device (11) is disposed above the upstream end of the intermediate conveyor (5). The imaging device (11) is, for example, a CCD camera, and is attached to a bracket fixed to the upper end of the frame of the ruled line unit (4). Near the upstream end of the intermediate conveyor (5), a first sensor (12) for detecting the cardboard sheet S is provided in the vicinity of the approximate center in the width direction of the intermediate conveyor (5). When the first sensor (12) detects the cardboard sheet S sent out from the ruled line unit (4) and reaching the upstream end of the intermediate conveyor (5), the imaging device (11) Take a picture of the print side. For example, a reflective photoelectric sensor is used as the first sensor 12, and the light reflected by the cardboard sheet S is received to detect the cardboard sheet S. Each time the cardboard sheet S is sent to the intermediate conveyor (5), the imaging device (11) photographs the upper surface of the cardboard sheet S. The quality of the printed state of the corrugated cardboard sheet S is determined based on the image data obtained by photographing, details of which will be described later.

  The defective sheet-like product rejection apparatus (1) is configured as a suction conveyor (13) that constitutes a conveyance line as the conveyance means of the present invention and the exclusion means of the present invention, and is determined to have a poor printing state (that is, The flip-up mechanism (14) that jumps up the corrugated cardboard sheet S (determined as a defective product) on the conveyance line and the exclusion means of the present invention, and discharges the cardboard sheet S that is flipped up and discharged downstream The mechanism (15), the stacking means of the present invention, and the defective product stacking mechanism (16) that receives the discharged corrugated cardboard sheet S, and the corrugated cardboard sheet S are prevented from flying over the defective product stacking mechanism (16). And a support mechanism (18) on which a suction conveyor (13) and the like are mounted. The upstream end of the support mechanism (18) is fixed to the support base (8).

  The stacker (9) includes a pair of pillars (91) (91) erected along the vertical direction, and a pair of mounting plates (92) (92) provided on the pillars (91) (91). It has. The column portions (91) (91) are spaced apart from each other in the width direction of the printing press, and a mounting plate (92) is provided on each of the column portions (91) (91). Each of the mounting plates (92) and (92) is provided with a horizontally long support member (93) and (93) having a rectangular cross section, and at each end of the support member (93) and (93), The sheet restricting portion (94) to which the corrugated cardboard sheet S (determined as a non-defective product) sent from the defective sheet-like product rejecting device (1) hits is fixed (in FIG. 1, column portions (91) (91), Only one of the mounting plates (92) (92) and the supporting members (93) (93) is shown). The sheet restricting portion (94) includes a frame body fixed to the support members (93) and (93), and a sheet-like flexible member (for example, a vinyl sheet) attached to the frame body along a substantially vertical direction. Is included. The corrugated cardboard sheet S that has jumped out of the defective sheet-like product removing device (1) falls on the flexible member of the sheet restricting section (94) and is stacked on a support table (95) that is provided so as to be movable up and down. The position or height of the support table (95) is appropriately adjusted so as to decrease as the height or number of stacked cardboard sheets S increases.

  FIG. 2 is a top view of the defective sheet-like product removal apparatus (1). For convenience of explanation, the discharge mechanism (15), defective product accumulation mechanism (16), and pop-out prevention mechanism (17) are omitted in FIG. The support mechanism (18) includes a pair of frames (81a) (81b) arranged in parallel, and a suction conveyor (13) is provided between the frames (81a) (81b). The suction conveyor (13) includes four endless belts (31a-d) that are circulated and driven, a drive shaft (32) provided near the upstream end of the frames (81a) and (81b), and a frame ( 81a) includes a driven shaft (33) provided in the vicinity of the downstream end of (81b) and two suction boxes (34a) (34b) spaced apart in the transport direction of the transport line .

  Both ends of the drive shaft (32) and both ends of the driven shaft (33) are supported by bearings (not shown) provided on the frames (81a) and (81b). One end of the drive shaft (32) is connected to a drive motor (not shown) and is rotationally driven by the drive motor. The endless belt (31a-d) is stretched between a drive pulley (35a-d) fixed to the drive shaft (32) and a driven pulley (36a-d) fixed to the driven shaft (33). It is. The four endless belts (31a-d) are arranged in parallel to each other, near the first belt (31a) arranged near one frame (81a) and the other frame (81b). It consists of a fourth belt (31d) arranged, and a second belt (31b) and a third belt (31c) arranged between the first belt (31a) and the fourth belt (31d). In this embodiment, the width of the second belt (31b) and the third belt (31c) is approximately twice the width of the first belt (31a), and the width of the fourth belt (31d) is It is the same as the width of one belt (31a). The interval between the second belt (31b) and the third belt (31c) is approximately twice the interval between the first belt (31a) and the second belt (31b). The interval between the fourth belt (31d) is the same as the interval between the first belt (31a) and the second belt (31b). In the present invention, the number of endless belts (31a-d) is not particularly limited.

  Both sides of the substantially rectangular suction box (34a) (34b) are fixed to the inner surface of the frame (81a) (81b), and the endless belt is stretched between the pulleys (35a-d) (36a-d) The upper part (the part moving downstream) of (31a-d) is disposed close to the upper surface of the suction box (34a) (34b). A lower portion (portion returning to the upstream side) of the endless belt (31a-d) is disposed below the suction boxes (34a) and (34b) (see FIG. 6 and the like). A plurality of openings (37) are formed along the endless belt (31a-d) on the upper surface of the suction box (34a) (34b), and the lower surface of the suction box (34a) (34b) is shown in the figure. An exhaust port (38) connected to the omitted exhaust means is formed (only the downstream suction box (34b) has an opening (37) and an exhaust port (38) shown by wavy lines). A large number of pores (not shown) are formed in the endless belt (31a-d), and the exhaust means sucks the air in the suction box (34a) (34b), so that the endless belt (31a-d) ), The cardboard sheet S is conveyed by the suction conveyor (13). In FIG. 2, the corrugated cardboard sheet S to be conveyed is indicated by a one-dot chain line.

  Between the suction boxes (34a) and (34b), a rectangular plate member (82) whose both ends are fixed to the frames (81a) and (81b) is close to the upper part of the endless belt (31a-d), It is arranged below (see FIG. 6 etc.). The plate-like member (82) is provided to limit the upper end of the endless belt (31a-d) and to protect the flip-up mechanism (14). The flip-up mechanism (14) of the defective sheet-like product rejection apparatus (1) includes four flaps (41a-d) that flip up the corrugated cardboard sheet S determined to be defective. These flaps (41a-d) are provided so as to be able to protrude and retract with respect to the plate-like member (82). The plate member (82) has a first opening (83a) between the first belt (31a) and the second belt (31b), and the second belt (31b) and the third belt (31c). A second opening (83b) and a third opening (83c) are opened between the third belt (31c) and a fourth opening (83d) between the third belt (31c) and the fourth belt (31d). These openings (84a-d) are substantially rectangular openings, and the flaps (41a-d) are taken in and out through these openings (83a-d). The plate-like member (82) has a U-shaped guide member (84a-d) for preventing the end portion of the corrugated cardboard sheet S from being caught on the flap (41a-d), and the edge of each opening (83a-d). Is fixed along.

  As long as the effects of the present invention are obtained, the shape, number and arrangement of the flaps (41a-d) are not particularly limited. However, in order to jump up the end portion of the corrugated cardboard sheet S in the same shape along the width direction, one or a plurality of flaps are provided between any adjacent endless belts (31a-d). Would be preferred. A flap may also be provided between the frames (81a) (81b) and the endless belts (31a) (31d).

 A second sensor (19) for detecting the cardboard sheet S sent from the intermediate conveyor (5) between the second belt (31b) and the third belt (31c) on the upstream side of the suction box (34a). Is provided. The second sensor (19) is, for example, a reflective photoelectric sensor that detects the ball sheet by light reflected from the cardboard sheet S, and is attached to a horizontal member (not shown). Further, a third sensor (20) used as described later is provided between the second flap (41b) and the third flap (41c). The third sensor (20) is, for example, a reflective photoelectric sensor, and is mounted on a support member (not shown) provided on the lower surface of the plate-like member (82). Light is irradiated upward through the established opening, and the reflected light is received.

  FIG. 3 is an enlarged view showing the first and second flaps (41a) and (41b) and their peripheral mechanisms, in which the frame (81a) and the plate-like member (82) are shown broken away. FIG. 4 is an enlarged view showing the third and fourth flaps (41c) and (41d) and their peripheral mechanisms, in which the frame (81b) and the plate-like member (82) are shown broken away. For simplicity, the suction boxes (34a) (34b) and the endless belts (31a-d) are not shown in FIGS.

  Each flap (41a-d) includes a plate-shaped base member (42), a substantially rectangular guide plate (43) fixed to the upper end surface of the base member (42), and a downstream side of the base member (42). And a pair of guide rollers (44a) (44b) pivotally attached to the ends. The guide rollers (44a) and (44b) are arranged so as to sandwich the base member (42) and so that the plane including the upper surface of the guide plate (43) is in contact with the peripheral surface of the guide rollers (44a) and (44b). Is done. The upstream end of the guide plate (43) is bent downward (see FIG. 6 and the like).

  Further, the flip-up mechanism (14) of the defective sheet-like product exclusion device (1) passes through the upstream end of the base member (42) of each flap (41a-d), and the endless belt (31a-d) The shaft member (45) arranged so as to be orthogonal to the (or the conveying direction of the cardboard sheet S), a plurality of bearing portions (46) into which the shaft member (45) is inserted, and the shaft member (45) are rotated. And an actuator (47) driven to rotate about the axis. The upstream end of the base member (42) of each flap (41a-d) is fixed to the shaft member (45) by welding, key connection, or the like. The bearing portion (46) is fixed to a horizontal member (85) that connects the frames (81a) and (81b). The actuator (47) is, for example, an air cylinder. As shown in FIG. 3 (and FIG. 6 and the like), the bracket (86) fixed to the lower surface of the frame (81a) is attached to the cylinder portion of the actuator (47). The lower end is pivoted. The tip of the rod of the actuator (47) is pivotally supported by the lower end of the first arm member (48) fixed to the end of the shaft member (45) on the frame (81a) side (see FIG. 6 and the like). . As the actuator (47) expands and contracts, the shaft member (45) rotates forward and backward about its central axis, and the flaps (41a-d) tilt or swing. A second arm member (49) is fixed to the end of the shaft member (45) on the frame (81b) side as shown in FIG. The frame (81b) includes an adjusting means (87) for adjusting the inclination or posture of the flap (41a-d) by restricting the displacement or movement of the second arm member (49) accompanying the rotation of the shaft member (45). ) Is provided (see FIG. 8).

  FIG. 5 is a partial top view of the defective sheet-like product removing device (1), showing a discharge mechanism (15), a defective product accumulation mechanism (16), and a pop-out prevention mechanism (17). 6 is a cross-sectional view taken along line AA in FIG. 5, and FIG. 7 is a cross-sectional view showing a pattern in which the first flap (41a) is lifted or tilted from the standby position shown in FIG. FIG. 8 is a cross-sectional view taken along the line BB in FIG.

  The discharge mechanism (15) of the defective sheet-like product rejection device (1) ejects the corrugated cardboard sheet S jumped up by the rise of the flaps (41a-d) toward the defective product accumulation mechanism (16). The discharge mechanism (15) is provided above the suction conveyor (13) and downstream of the flaps (41a-d). The discharge mechanism (15) includes three long cylindrical discharge rollers (51a-c) juxtaposed and seven short cylindrical pressing rollers (above the upstream discharge rollers (51a)). 52). The corrugated cardboard sheet S bounced up by the raised flaps (41a-d) is sandwiched between the discharge rollers (51a-c) and the pressing rollers (52).

  The discharge rollers (51a-c) are arranged such that their rotation axes are orthogonal to the conveyance direction of the conveyance line or the endless belt (31a-d). Further, the discharge roller (51a-c) is arranged so that the discharge roller on the downstream side is further away from the suction conveyor (13), and when the flap (41a-d) is raised, the discharge roller (51a-c) -c) is arranged such that a plane F coming into contact with the outer peripheral surface of the discharge roller (51a-c) from the upper side is substantially flush with the upper surface of the guide plate (43) (see FIG. 7). Thus, by arranging the discharge rollers (51a-c), the orientation and posture at the time of discharging the cardboard sheet S toward the defective product stacking mechanism (16) are given (or determined). Further, the pressing roller (52) suppresses fluctuations in the orientation and posture of the corrugated cardboard sheet S when it is ejected, thereby stabilizing the trajectory of the series of corrugated cardboard sheets S to be ejected. The separation distance between the discharge rollers (51a-c) (more specifically, the flat surface F) and the outer peripheral surface of the pressing roller (52) is made the same as or slightly shorter than the thickness of the cardboard sheet S. Although details are omitted, the discharge roller (51a-c) and the pressing roller (52) are provided such that the angle formed by the plate-like member (82) and the plane F, the separation distance, and the like can be adjusted.

  In this embodiment, each of the discharge rollers (51a-c) is formed in a cylindrical shape having substantially the same length as the interval between the frames (81a) and (81b), and the discharge rollers (51a-51) are arranged along the central axis thereof. It is fixed to a shaft member (53a-c) that passes through c). These shaft members (53a-c) are pivotally supported by bearings (not shown) provided on support plates (54a) (54b) fixed to the frames (81a) (81b). The shaft member (53a) to which the upstream discharge roller (51a) is fixed is connected to the discharge roller drive motor (55) via connection means including, for example, a sprocket and a chain. On the support plate (54b) side, the shaft members (53a-c) of the three discharge rollers (51a-c) are connected via connection means including, for example, sprockets and chains, and the discharge roller drive motor (55), the three discharge rollers (51a-c) are rotationally driven to send the corrugated cardboard sheet S toward the defective product stacking mechanism (16) (in FIGS. 6 and 7, the discharge rollers ( The direction of rotation of 51a-c) is indicated by an arrow).

  The seven pressing rollers (52) are concentrically fixed to a shaft member (56) supported at both ends by bearings (not shown) provided on the support plates (54a) (54b). In this embodiment, the diameter of the pressing roller (52) is about twice the diameter of the discharge rollers (51a-c). Of the seven pressing rollers (52), the pressing roller (52) closest to the frame (81a) is disposed on the first endless belt (31a), and the pressing roller (52 closest to the frame (81b)) ) Is disposed on the fourth endless belt (31d). The remaining pressing rollers (52) are arranged at a predetermined interval between the pressing rollers (52) and the pressing rollers (52). The end portion of the shaft member (56) on the support plate (54a) side is connected to the pressing roller drive motor (57) via connecting means including, for example, a sprocket and a chain. The pressure roller (52) is rotationally driven by the pressure roller drive motor (57) so as to feed the corrugated cardboard sheet S toward the defective product accumulation mechanism (16) (in FIG. 6 and FIG. 7, the pressure roller (52 ) Is indicated by an arrow). As long as the effects of the present invention can be obtained, the number of the pressing rollers (52) and the way of arranging the pressing rollers (52) are not particularly limited.

  During the operation of the defective sheet product removing device (1), the discharge rollers (51a-c) and the pressing roller (52) are always rotating. In order to smoothly discharge the corrugated cardboard sheet S, the conveyance speed of the discharge rollers (51a-c), that is, the circumference of the discharge rollers (51a-c) × the number of rotations per unit time, and the pressure roller (52) The conveyance speed, that is, the circumferential length of the pressing roller (52) × the number of rotations per unit time, is slightly higher than the conveyance speed of the suction conveyor (13), that is, the movement speed of the endless belt (31a-d). . In the prototype defective sheet-like product elimination device (1), the trajectory of a series of corrugated cardboard sheets that are blown by making the conveyance speed of the pressing roller (52) slightly higher than the conveyance speed of the discharge rollers (51a-c). Was more stable.

  In the ruled line unit (4), the corrugated cardboard sheet S is grooved. In order to prevent or suppress the deformation of the corrugated sheet S due to the formed grooves when the flaps (41a-d) are raised, the adjacent ones of the plural grooves formed in the downstream portion of the corrugated sheet S And between the groove closest to the frame (81a) and the frame (81a) side edge of the cardboard sheet S, and between the groove closest to the frame (81b) and the frame (81b) side edge of the cardboard sheet S Is preferably supported or guided by at least one of the flaps (41a-d) when the flaps (41a-d) are raised. The corrugated cardboard sheet S inserted between the discharge roller (51a-c) and the pressing roller (52) also has a frame (81a) between the adjacent grooves in the plurality of grooves formed in the downstream portion thereof. Between the groove near the frame and the frame (81a) side edge of the cardboard sheet S and between the groove closest to the frame (81b) and the frame (81b) side edge of the cardboard sheet S. It is preferable that at least one is pressed.

  As shown in FIG. 5, the defective product accumulation mechanism (16) is provided above the suction conveyor (13) and downstream of the discharge mechanism (15). The defective product accumulation mechanism (16) includes a rectangular base plate (61) disposed in parallel with the endless belt (31a-d) and above the upper end of the endless belt (31a-d), and the base plate (61 ) On the upstream side of the defective product conveyor (62) and the downstream end of the base plate (61), the plate provided substantially perpendicular to the base plate (61) Or a sheet-like flexible member (63) and a pair of support members (64a) and (64b) for supporting the flexible member (63).

  The cardboard sheet S discharged from the discharge mechanism (15) falls on the defective product conveyor (62). The defective product conveyor (62) is, for example, a thin belt conveyor, and moves the dropped cardboard sheet S from the frame (81a) toward the frame (81b). At the end of the base plate (61) on the frame (81b) side, a first wall (65) is provided substantially perpendicular to the base plate (61), and falls on the defective product conveyor (62). The cardboard sheet S is restricted from moving by hitting the first wall portion (65). The corrugated cardboard sheet S discharged from the discharge mechanism (15) may fly over the defective product conveyor (62), hit the flexible member (63), and be dropped onto the defective product conveyor (62). For example, a vinyl sheet is used for the flexible member (63). A second wall portion (66) is provided at the upstream end of the base plate (61), and the defective sheet-shaped product removing device (1) is used in an inclined state as shown in FIG. In this case, it is possible to prevent the corrugated cardboard sheet S from slipping out of the defective product accumulation mechanism (16).

  An operator stands on the outside of the first wall portion (65), and when the corrugated cardboard sheet S is sent to the defective product stacking mechanism (16), the corrugated cardboard sheet S is visually checked to determine whether it is a defective product. . Alternatively, the operator picks up a plurality of corrugated cardboard sheets S stacked in the defective product stacking mechanism (16) one by one and confirms whether they are non-defective products.

  When adjusting the defective sheet-like product removing device (1), the corrugated sheet S may be discharged from the discharge mechanism (15) at a considerable speed or momentum. In such a case, the pop-out prevention mechanism (17) prevents the corrugated cardboard sheet S from jumping over the defective product accumulation mechanism (16). The pop-out prevention mechanism (17) includes a U-shaped support frame (71) fixed to the frames (81a) and (81b) on the upstream side of the flaps (41a-d), and a downstream from the upper part of the support frame (71). A shaft body (73) supported by a pair of support members (72a) and (72b) extending to the side, and four flexible belt-shaped members (74a-d) fixed to the shaft body (73) ). Both end portions of the shaft body (73) are pivotally supported by bearings (not shown) provided on the support members (72a) and (72b). The shaft body (73) is arranged so as to be orthogonal to the endless belt (31a-d), and the belt-like member (74a-d) extends from the shaft body (73) to the defective product conveyor (62). Go up.

 The belt-like member (74a) near the frame (81a) is on the first endless belt (31a), and the belt-like member (74d) near the frame (81b) is on the fourth endless belt (31d). The strip members (74b) and (74c) are arranged between the strip members (74a) and (74d) so that the strip members (74a-d) are separated at a predetermined interval. The rotation mechanism of the shaft body (73) can be adjusted and held by an adjustment mechanism (not shown), and the angle or posture of the belt-like member (74a-d) is appropriately adjusted. The corrugated cardboard sheet S discharged or blown from the discharge mechanism (15) at a considerable speed hits the belt-like member (74a-d) and is dropped onto the defective product conveyor (62), and thus is discharged from the discharge mechanism (15). The situation where the corrugated cardboard sheet S jumps over the flexible member (63) and goes out of the defective product accumulation mechanism (16) is prevented.

  As shown in FIG. 8, the adjusting means (87) for adjusting the inclination or posture of the flap (41a-d) is a U-shaped block body (fixed to the frame (81b) via an attachment member (88) ( 89). The block body (89) is arranged to be inclined so as to open upward and to be higher on the downstream side. Screw holes are formed in each of the opposing extension portions of the block body (89), and bolts (90a) and (90b) are inserted from the outside into the screw holes and screwed together. The front ends of the bolts (90a) and (90b) protrude inward from the extending portions of the block body (89), and the jumping mechanism (14) is provided between the front ends of these bolts (90a) and (90b). A lower end portion of the second arm member (49) fixed to the shaft member (45) is disposed. In the standby state of the flip-up mechanism (14), as shown in FIG. 8, the lower end of the second arm member (49) contacts the tip of the upstream bolt (90a). When the actuator (47) extends and the second arm member (49) rotates or swings as the shaft member (45) rotates, the lower end of the second arm member (49) is connected to the downstream bolt (90b). It abuts on the tip. As a result, the flaps (41a-d) of the flip-up mechanism (14) are stopped at the raised position shown in FIG. The inclination of the flap (41a-d) at the time of ascending stop changes according to the degree of insertion of the bolt (90b) on the downstream side.

  The corrugated cardboard sheet S determined to be a non-defective product passes under the discharge rollers (51a-c) of the discharge mechanism (15) and under the base plate (61) of the defective product stacking mechanism (16), and then the suction conveyor (13). Is transported to the stacker (9). As shown in FIG. 6, the upper surface of the guide member (84a-d) is disposed below the upper surface (conveying surface) of the upper end of the endless belt (31a-d), and the flap (41a-d) Since the guide plate (43) and the guide roller (52) are arranged so as not to protrude from the upper surface of the guide member (84a-d) when the discharge mechanism (15) is stopped, the corrugated cardboard sheet S determined to be non-defective is obtained. Then, it is smoothly conveyed by the suction conveyor (13).

  There may occur a situation in which a portion between the endless belts (31a-d) of the cardboard sheet S conveyed by the suction conveyor (13) bends or curves downward. Even if such a situation occurs, guide members (84a-d) are provided in order to smoothly jump up the cardboard sheet S and send it to the discharge mechanism (15). Without the guide member (84a-d), when the flap (41a-d) rises with the portion between the endless belts (31a-d) of the corrugated cardboard sheet S bent, the tip of the corrugated cardboard sheet S flaps ( 41a-d) may come into contact with the end face of the guide plate (43), or the front end of the cardboard sheet S may be caught between the front end portion of the guide plate (43) and the plate-like member (82). In the defective sheet-like product rejection apparatus (1) of the present embodiment, as shown in FIG. 7, the guide plate of the flap (41a-d) with the flap (41a-d) of the flip-up mechanism (14) raised. The upper surface of (43) and the inclined surface on the upstream side of the guide member (84a-d) are arranged in substantially the same plane, and the guide member (84a-d) is a flap (41a- The end face of the guide plate (43) of d) is shielded. As a result, the state where the portion between the endless belts (31a-d) of the cardboard sheet S is bent is also guided by the inclined surface of the guide member (84a-d), and the cardboard sheet is smoothly moved by the flaps (41a-d). Be jumped up to. Further, the corrugated cardboard sheet S determined to be non-defective is smoothly conveyed by hitting the inclined surface of the guide member (84a-d) even if the portion between the endless belts (31a-d) is bent.

  FIG. 9 is a block diagram showing a control configuration of the defective sheet-like product removing apparatus (1). FIG. 10 is a flowchart showing the operation of the defective sheet-like product rejection apparatus (1). FIGS. 11 a and b, FIGS. 12 a and b, FIGS. 13 a and b, and FIGS. 14 a and b are explanatory views schematically showing the operation of the defective sheet-like product eliminating device (1). The defective sheet-like product rejection apparatus (1) controls the defective sheet-like product exclusion apparatus (1) in an integrated manner, executes a program describing the operation shown in the flowchart of FIG. 10, and serves as a determination means of the present invention. Image of the corrugated cardboard sheet S generated by the functioning CPU (101), the ROM (102) storing the program describing the control of the defective sheet-like product elimination apparatus (1) including the program, and the imaging device (11) RAM (103) for storing data and data used for arithmetic processing of the CPU (101), and I / O (104) for connecting the CPU (101) and the imaging device (11) and the like are provided. ing.

  Referring to FIG. 10, when the first sensor (12) detects the corrugated cardboard sheet S discharged from the ruled line unit (4) (step S1), a CPU (1) receiving a signal indicating that from the first sensor (12). 101) instructs the imaging device (11) to shoot the detected cardboard sheet, and the imaging device (11) receiving the instruction from the CPU (101) shoots the cardboard sheet S (step S3). ). More specifically, as shown in FIG. 11a, the first sensor (12) detects the downstream end of the cardboard sheet S sent from the ruled line unit (4) to the intermediate conveyor (5). The CPU (101) that has received the signal indicating that from the first sensor (12), as shown in FIG. 11b, the entire upper surface of the corrugated cardboard sheet S (or the entire printing area) is captured by the imaging device (11 The imaging command is issued to the imaging device (11) at a timing so as to be within the angle of view).

  The image data of the cardboard sheet S obtained by the imaging device (11) is stored in the RAM (103), and based on the image data, the CPU (101) determines whether the printing state of the cardboard sheet is good, that is, the cardboard sheet S. Whether or not is a non-defective product is determined (step S5). For example, the RAM (103) stores reference image data obtained by photographing a non-defective cardboard sheet S in advance. In step S5, the image data obtained in step S3 is compared with the reference image data. If these image data are considered to be the same within a preset error range or tolerance, it is determined that the cardboard sheet S related to the image data obtained in step S3 is a non-defective product. As described above, the judgment criteria (for example, the above error range or allowable range) are (non-defective product) so that the defective cardboard sheets S are not mixed with the cardboard sheets accumulated in the stacker (9). Against).

  If it is determined in step S5 that the cardboard sheet S sent from the ruled line unit (4) is not a non-defective product, that is, a defective product, it is sent from the intermediate conveyor (5) as shown in FIG. 12a. When the second sensor (19) provided on the suction conveyor (13) detects the downstream end of the cardboard sheet S (step S7), the CPU that has received a signal indicating that from the second sensor (19) (101) instructs the actuator (47) to move the rod to the extended position shown in FIG. 7 after a predetermined time has elapsed after receiving the signal. The actuator (47) receiving the instruction from the CPU (101) extends the rod, and thereby the flaps (41a-d) are raised (step S9). As shown in FIG. 12b, when the leading end of the corrugated cardboard sheet S comes in front of the flaps (41a-d), the flaps (41a-d) are raised by the suction conveyor (13) during the predetermined period. Determined based on speed. The flaps (41a-d) wait for the corrugated cardboard sheet S determined to be defective in the raised state.

  Since the corrugated board sheet S is conveyed in a state of being sucked by the endless belt (31a-d) of the suction conveyor (13), when the leading end of the corrugated board sheet S comes into contact with the flap (41a-d), the flap (41a -d) jumps up. The cardboard sheet S is pushed by the suction conveyor (13) (biased downstream by the endless belt (31a-d)) and guided by the flap (41a-d) to advance toward the discharge mechanism (15). As shown in FIG. 13a, the sheet is inserted between the discharge roller (51a-c) and the pressing roller (52) of the discharge mechanism (15) in a curved state. The discharge roller (51a-c) and the pressing roller (52) are rotationally driven so as to send the corrugated cardboard sheet S to the downstream side at a conveyance speed faster than the conveyance speed of the suction conveyor (13), as shown in FIG. 13b. In addition, the corrugated cardboard sheet S is blown above the defective product stacking mechanism (16) and removed from the suction conveyor (13). When the corrugated cardboard sheet S is guided by the flaps (41a-d) and flipped up, the third sensor (20) is turned on, and the corrugated cardboard sheet S jumped above the defective product stacking mechanism (16). In this case, the third sensor (20) is turned off (step S11). When receiving a signal indicating that it has been turned off from the third sensor (20), the CPU (101) instructs the actuator (47) to move the rod to the retracted position shown in FIG. The actuator (47) which received the instruction from (5) contracts the rod. As a result, the flaps (41a-d) are accommodated and enter a standby state (step S13). As shown in FIG. 14a, the skipped corrugated cardboard sheet S falls on the defective product conveyor (62) of the defective product stacking mechanism (16) directly or by hitting the flexible member (63).

  When it is determined that the product is non-defective in step S5, the corrugated cardboard sheet S passes under the discharge rollers (51a-c) and under the defective product stacking mechanism (16) as shown in FIG. ) To the stacker (9). When it is determined that the product is non-defective in step S5, or after step S13, the CPU (101) confirms whether there is a next corrugated cardboard sheet to be processed by the defective sheet-like product removing device (1) (step S13). S15) If there is a next cardboard sheet, step S1 and the subsequent steps are performed again on the cardboard sheet. Note that the processing shown in FIG. 10 may be executed in parallel on a plurality of corrugated cardboard sheets at different times.

  In the above embodiment, the defective sheet-like product exclusion device (1) is provided as a part of the corrugated cardboard printing machine, but the defective sheet-like product elimination device of the present invention is an apparatus or system other than the printing machine. For example, it may be used as a part of a quality assurance inspection apparatus disclosed in Japanese Patent Application Laid-Open No. 2004-338006 (Patent Document 2).

  The present invention may be applied to sheet products such as synthetic resin films in addition to corrugated cardboard sheets. In the above embodiment, good / bad is determined based on the printing state of the corrugated cardboard sheet, but it may be determined whether good / bad is determined based on the shape of the sheet-like product such as the corrugated cardboard sheet instead of the printing state. Further, good / bad may be determined based on the printing state and shape of the sheet-like product.

  In this embodiment, since a plurality of short cylindrical pressing rollers (52) are used at predetermined intervals, the area of the printing surface (upper surface) of the corrugated cardboard sheet in contact with the pressing rollers (52) is reduced. This is preferable. When it is judged whether the shape of the non-printed sheet-like product is good or bad, the presser has a length similar to the interval between the frames (81a) and (81b) like the discharge rollers (51a-c). A roller (52) may be used.

  The above description is provided to illustrate the present invention and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

(1) Device for rejecting defective sheet products
(2a-c) Printing unit
(3) Paper feed unit
(4) Ruled line unit
(5) Intermediate conveyor
(9) Stacker
(11) Imaging device
(13) Suction conveyor
(14) Bounce mechanism
(15) Ejection mechanism
(16) Defective product accumulation mechanism
(17) Pop-out prevention mechanism
(31a-d) Endless belt
(41a-d) Flap
(51a-c) Discharge roller
(52) Presser roller
(101) CPU

Claims (3)

Conveying means for conveying the sheet-like product, determination means for judging the quality of the sheet-like product, exclusion means for excluding the sheet-like product determined as defective by the judging means from the conveying means, and the exclusion means A defective sheet-like product exclusion device comprising a stacking means for collecting the sheet-like product excluded from
The conveying means comprises a suction conveyor;
The rejecting means bounces up an end portion of the sheet-like product determined to be defective by the judging means on the downstream side in the conveying direction of the conveying means when the sheet-like product is being conveyed by the suction conveyor. A lifting mechanism, and a discharge mechanism for flying the sheet-like product jumped up by the flip-up mechanism to the downstream side,
The stacking means is disposed on the downstream side of the discharge mechanism and is disposed above the suction conveyor, and the sheet-like product determined by the determination means as a non-defective product passes below the stacking means. Defective sheet-like product removal device that is transported by The discharge mechanism is disposed above a plurality of discharge rollers juxtaposed above the suction conveyor, and above the discharge rollers on the upstream side in the transport direction of the transport means of the plurality of discharge rollers. A plurality of pressing rollers arranged apart from each other in the width direction,
The plurality of discharge rollers are arranged such that the discharge rollers on the downstream side are further away from the suction conveyor,
The sheet-like product bounced up by the bounce-up mechanism is inserted between the plurality of discharge rollers and the plurality of pressing rollers,
The plurality of discharge rollers and the plurality of pressing rollers are driven to rotate so as to send the inserted sheet-like product downstream.
2. The defective sheet-shaped product rejection apparatus according to claim 1, wherein the sheet-like product determined as a non-defective product by the determination unit is conveyed below the plurality of discharge rollers. The suction conveyor is provided with a plurality of endless belts that are driven to circulate and on which a sheet-like product to be conveyed is adsorbed,
The flip-up mechanism includes a plurality of flaps provided so as to be able to protrude and retract from the upper surfaces of the plurality of endless belts, and between any adjacent endless belts in the plurality of endless belts, The defective sheet-like product rejection apparatus according to claim 1 or 2, wherein one or a plurality of flaps among the plurality of flaps are provided.

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