JP4251978B2 - Defective sheet removal device - Google Patents

Description

  The present invention relates to a defective sheet removing apparatus that automatically removes a defective sheet from a non-defective sheet conveyance line.

  In a production line for forming a flat box for forming a corrugated cardboard box from a rectangular corrugated cardboard sheet having two parallel ruled lines, for example, as described in Patent Document 1, the corrugated cardboard sheet is used as a printer. The paper is supplied to the slotter and printed on the cardboard sheet by the printer slotter. At the same time, four vertical ruled lines are formed at right angles to the horizontal ruled lines, and slots are formed to form a blank for forming a cardboard box. Then, the blank is supplied to the folder gluer unit, and the blanks are conveyed by the folder gluer unit, and the panels at both ends of the blank are bent by approximately 180 ° along the vertical ruled line formed between adjacent panels. Then, the end of one panel is overlaid on the connection piece formed on the edge of the other panel, and one of the panels is adhered to the connection piece by an adhesive applied in advance. By adhering the panel to the connecting piece so that to form a flat box body.

  In addition, the flat box body discharged from the folder gluer part is dropped and stacked in a hopper provided on the downstream side of the folder gluer part, and the counter ejector part is continuously taken out one by one from the lower end of the hopper. A predetermined number of boxes are piled up by the counter ejector unit, and the piled boxes are bound with a string in the next step.

  In the flat box production line as described above, when forming a box forming blank in the printer slotter section, there may be a feeding error in which the corrugated board sheet is sent with an inclination, and printing is caused by the feeding mistake. Punching mistakes occur when forming mistakes and slots.

  Since the flat box formed by the blank in which these mistakes have occurred is a defective product, the defective product needs to be removed from the transport line before being stacked in the hopper.

  Further, when forming a flat box body by the folder gluer portion, a feeding error may occur in the blank, and the blank cannot be folded with high accuracy due to the feeding error, and a bending error occurs. Also, when applying adhesive to blank connection pieces, there may be excess or deficiency in the amount applied, and when the amount of adhesive applied is small, the connection between the connection piece and the panel is insufficient and peels off. On the other hand, in the case where there are many, there is a risk that the adhesive will protrude to the periphery, contaminating the peripheral portion of the connection piece, or adhering to the overlapping box when the flat boxes are stacked in the hopper.

  Therefore, when these mistakes occur, the box becomes a defective product, and it is necessary to remove the defective product from the transport line.

  Here, it is extremely difficult for an operator to find out a blank in which a printing error or the like has occurred or a box body in which bending failure or adhesion failure has occurred (hereinafter referred to as a defective sheet) during the box manufacturing process. It cannot be excluded with certainty.

Therefore, in the invention described in Patent Document 1, a detection sensor that detects a sheet feeding error, a detection sensor that detects a printing misalignment, a detection sensor that detects a punching defect, and the like on the sheet transfer path of the printer slotter and the folder gluer. These detection sensors are provided, and when each of these detection sensors detects a defective sheet, an alarm is activated or a defective sheet discharge pusher is activated.
JP-A-9-165124

  By the way, if it is the structure which detects a bad sheet | seat and only operates an alarm device, an operator will be needed in order to remove a bad sheet | seat, it will be inefficient and a problem will arise economically.

  Japanese Patent Application Laid-Open No. 2004-151561 has a description of operating a defective sheet dispensing pusher, but does not describe anything about the installation position and operation of the dispensing pusher.

  Japanese Patent No. 2896132 proposes a sheet stacking apparatus that can automatically remove defective sheets from a conveyance line.

  In the sheet stacking device, a stacking table is provided below the suction transport conveyor that sucks the upper surface of the sheet fed from the transport device and transports it downstream, and the upper end of the front end wall provided on the downstream side of the stacking table and the above A gate is provided between the suction conveyor and the carrier side surface, the gate can be opened and closed by a gate plate that is moved up and down, and a detection sensor for detecting a defective sheet is provided on the discharge end of the conveyor. Only when the detection sensor detects a defective sheet, the gate plate is lowered, and the defective sheet is discharged downstream from the opened gate.

  By the way, in the sheet stacking apparatus, even when the sheet is a non-defective sheet, the sheet is always sucked by the suction conveyance conveyor, and when the non-defective sheet comes into contact with the gate plate and stops, the protruding member provided on the upper side rotates. Since the extruding member forcibly releases the non-defective sheet from the adsorption by the action of pressing the upper surface of the non-defective sheet, the non-defective sheet is dropped on the stacking table. There is a risk of scratching by pressing the member.

  An object of the present invention is to remove a defective sheet which can travel along a conveyance line without damaging the non-defective sheet and can automatically remove a defective sheet from the conveyance line of the non-defective sheet. Is to provide.

  In order to solve the above-described problems, in the present invention, there is provided a conveyance device that conveys a sheet in one direction, and a shutter that can be opened and closed, and a sheet that is fed from a carry-out end of the conveyance device when the shutter is open. A blower that blows air toward the upper surface, a stopper member that receives and drops the sheet fed from the carry-out end of the transport device, and a tip that is disposed on the stopper member and is located on the carry-out end side of the transport device A defective sheet receiving member that receives a defective sheet that is sent from the conveying device in a state that is supported so as to be swingable in a vertical direction, and whose leading end is positioned below a conveying line for the sheet that is sent from the conveying device, and the receiving member A lift drive device that moves the tip of the fan up and down, and a shutter drive device in the direction in which the shutter of the blower device closes based on the failure signal It actuates the tip of the receiving member is of adopting a structure consisting of a control unit for operating the elevator drive unit to descend.

  In the defective sheet removing apparatus having the above configuration, when a defective signal is input to the control unit, immediately before the defective sheet is sent out from the carry-out end of the conveying device, the shutter of the blower device is closed to stop the blowing, Further, the elevating drive device is operated, and the leading edge of the defective sheet receiving member is lowered to a position below the sheet conveying line.

  For this reason, the defective sheet sent out from the carry-out end of the conveying device is received by the receiving member and removed from the conveying line for the non-defective sheet.

  As described above, in the present invention, just before a defective sheet is sent out from the carry-out end of the transport device, the leading end of the receiving member descends and receives the defective sheet carried out from the carry-out end of the transport device. It can be automatically removed from the sheet conveying line.

  Further, since the air is blown on the upper surface of the non-defective sheet received by the stopper member, the non-defective sheet can be sent to the lower conveying line without being damaged.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, defective sheets are mixed in the sheet S formed of a flat box or the like formed by folder gluer.

  A conveying apparatus 1 that conveys a sheet S in one direction includes a pair of upper and lower belt conveyors 1a and 1b, and the pair of belt conveyors 1a and 1b sandwiches the sheet S from above and below at a carry-out end. It is conveyed toward.

  Below the carry-out end of the conveyance device 1, a hopper 10 capable of accommodating the sheets S carried out from the conveyance device 1 in a stacked state is provided.

  The hopper 10 includes a front guide 11 that positions the front edge in the conveyance direction of the sheet S and a back guide 12 that positions the rear edge. As shown in FIGS. 3 and 4, the front guide 11 is provided between the opposing side plates 13 a of the movable frame 13 whose position can be adjusted toward the carry-out end of the conveying device 1, and the movement of the movable frame 13 causes the sheet S to move. The position of the front guide 11 can be adjusted according to the size.

  As shown in FIG. 1, below the hopper 10, a conveyance conveyor 14 is provided that conveys sheets S stacked in the hopper 10 one by one from the lower part to the downstream side.

  As shown in FIGS. 2 and 4, a plurality of bearings 15 are attached to the upper portion of the front guide 11, and a lower end portion of a plate-like stopper member 17 is supported by a shaft 16 supported by the bearings 15.

  The stopper member 17 can be raised and lowered about the shaft 16. The stopper member 17 is oscillated between an upright state and an inclined state where the stopper member 17 is tilted to the downstream side in the conveying direction of the sheet S by operation of an oscillating cylinder 18 as a undulating drive device connected to both sides of the back surface. The sheet S sent out from the carry-out end of the conveying device 1 is received and dropped.

  As shown in FIGS. 1 and 2, a blower 20 is provided above the hopper 10. The blower device 20 includes a blower fan 22, a shutter 23, and a wind direction adjusting blade 24 in order from the top in a blower duct 21 whose upper and lower ends are open, and sends the wind downward by the rotation of the blower fan 22.

  The direction of the wind direction adjusting blade 24 is adjusted according to the conveyance speed of the sheet S and the size of the sheet S.

  The shutter 23 includes a plurality of blades 25 arranged in parallel, and each blade 25 is fixed to a shaft 26 that is rotatably supported by a blower duct 21.

  The shutter 23 is opened and closed by a shutter driving device 27. The shutter drive device 27 attaches a lever 28 to the end of each shaft 26 that passes through the side wall of the air duct 21 and faces the outside, connects the tip of each lever 28 to the link 29, and also connects the plurality of shafts 26. Among them, a drive lever 30 is attached to the end of one shaft 26, a cylinder 31 is connected to the drive lever 30, and each of the plurality of shafts 26 is rotated by expansion and contraction of the cylinder 31, so that the blades 25 are substantially vertical. It is configured to rotate between a state and a substantially horizontal state.

  Here, in the shutter 23, the state in which the blades 25 are substantially vertical is an open state, while the state in which the blades 25 are substantially horizontal is a closed state, and the air blown from the blower fan 22 is blown in the closed state. To prevent discharge from the lower end opening of the.

  As shown in FIG. 1, a fixed frame 40 is provided on the downstream side of the hopper 10, and a conveyor base 42 is provided between opposing side plates 41 of the fixed frame 40.

  As shown in FIGS. 6 to 8, the conveyor base 42 includes a pair of side frames 43 and a support beam 44 provided between the side frames 43. The pair of side frames 43 includes a horizontal axis. A plurality of horizontal rollers 45 rotatable around the core and a vertical roller 46 rotatable around a vertical axis are provided. The horizontal roller 45 is a substantially horizontal roller provided on the inner surface of the side plate 41 of the fixed frame 40. Rolling is possible along the upper surface of the rail member 48, while the vertical roller 46 is capable of rolling along the inner surface of the rail member 48.

  For this reason, the conveyor base 42 is movable with respect to the carry-out end of the transport device 1 and is moved by a reciprocating cylinder 49 as a reciprocating device connected to the side frame 43.

  On the support beam 44 of the conveyor base 42, the carry-out end portion of the discharge conveyor 50 is arranged. The discharge conveyor 50 is composed of a double-row belt conveyor 51, the pulley shaft 53 of the drive pulley 52 provided on the carry-out end side of the belt conveyor 51 is made common, and both ends of the pulley shaft 53 are fixed to the support beam 44. The plurality of bearings 54 are rotatably supported. The pulley shaft 53 is rotationally driven by a motor 55 with a speed reducer supported by a support beam 44.

  As shown in FIGS. 3 and 4, the carry-in end of the double-row belt conveyor 51 is disposed on a movable beam 56 provided between the side plates 13 a of the movable frame 13.

  The movable beam 56 has a pair of roller arms 57 at both ends, and a pair of guide rollers 58 are provided on the outer surface of each roller arm 57, and each guide roller 58 is formed on the inner surface of the side plate 13a of the movable frame 13. It is possible to roll along the provided guide groove 59 extending in the vertical direction.

  For this reason, the movable beam 56 is guided by the guide groove 59 and can be moved up and down, and is moved up and down by a lifting cylinder 60 as a lifting device connected to the lower end of each roller arm 57.

  Two pairs of opposed pairs of rollers 61 are provided on the upper surface of the movable beam 56, and each pair of rollers 61 is fitted in guide grooves 62 provided on both sides of the conveyor frame 51a in the belt conveyor 51, When the conveyor base 42 is reciprocated in the horizontal direction, the reciprocation of the belt conveyor 51 moving together with the conveyor base 42 is guided.

  A receiving member 63 for receiving a defective sheet is provided between the carry-in ends of the conveyor frame 51 a of the double-row belt conveyor 51. The receiving member 63 has a tapered lower surface and a thin tip at the front end facing the carry-out end of the transfer device 1. The receiving member 63 is disposed at a lower end than the conveying line of the sheet S fed from the unloading end of the conveying apparatus 1 at the stop position where the movable beam 56 is lowered by the operation of the lifting / lowering cylinder 60, and the movable beam described above. In the lift stop state of 56, it is arranged above the transport line so as not to obstruct the movement of the sheet S.

  As shown in FIG. 1, a detection sensor PH that detects a defective sheet S is provided at the carry-out end portion of the conveyance device 1. This detection sensor PH starts a detection operation immediately after the passage of time from when the pass / fail judgment sensor provided in the sheet processing step detects a defective sheet until the defective sheet reaches the position immediately before the detection sensor. When the detection sensor PH detects the defective sheet S, it outputs the defect detection signal to the control unit 65.

  Based on the defect detection signal input from the detection sensor PH, the control unit 65 operates the shutter driving device 27 in the direction in which the blades 25 of the shutter 23 in the blower 20 are closed, and in the direction in which the stopper member 17 is tilted downstream. The oscillating cylinder 18 is operated, the reciprocating cylinder 49 is operated in the direction in which the conveyor base 42 moves toward the carry-in end of the transfer device 1, and the carry-in end of the discharge conveyor 50 is moved up and down. The cylinder 60 is actuated.

  The defective sheet removing apparatus shown in the embodiment has the above structure. When the sheet S conveyed by the conveying apparatus 1 is a non-defective sheet S, the detection sensor PH does not operate.

  At this time, as shown in FIGS. 1 and 2, the stopper member 17 is held in an upright state, the shutter 23 of the blower 20 is held in an open state, and the lower end of the blower duct 21 is rotated by the rotation of the blower fan 22. Wind is sent downward from the opening. Further, the conveyor base 42 is disposed at a retracted position away from the carry-out end of the transport device 1, and the movable beam 56 is held at the raised position, and the tip of the receiving member 63 provided between the carry-in ends of the discharge conveyor 50. Are arranged on a conveyance line that is fed out from the carry-out end of the conveyance device 1.

  For this reason, the non-defective sheet S carried out from the carry-out end of the conveying device 1 is received by the stopper member 17 held in an upright state, and pushed downward by the air blown from the blower duct 21 of the blower device 20 to be pressed downward. It falls into the hopper 10 and is stacked on the non-defective sheet S that has been fed into the hopper 10 first.

  When the sheet conveyed by the conveying device 1 is a defective sheet S, when the defective sheet S is conveyed to the position of the detection sensor PH, the detection sensor PH detects the defective sheet S and the defect detection signal is transmitted to the control unit 65. Output to.

  Based on the failure detection signal input from the detection sensor PH, the control unit 65 operates the swing cylinder 18 in a direction in which the stopper member 17 is tilted downstream, and moves the cylinder 31 in a direction in which the shutter 23 of the blower 20 is closed. Operate.

  Further, the reciprocating cylinder 49 is operated in the direction in which the conveyor base 42 moves forward toward the carry-out end of the transport device 1, and the lifting cylinder 60 is operated in the direction in which the movable beam 56 is lowered.

  By the operation of the reciprocating cylinder 49 and the raising / lowering cylinder 60, the discharge conveyor 50 moves forward while the carry-in end is lowered, and the leading end of the receiving member 63 is slightly smaller than the carrying line of the sheet S carried out from the carry-out end of the carrying device 1. It arrange | positions in the downward position (refer FIG. 9).

  For this reason, the defective sheet S sent out from the carry-out end of the conveying device 1 is received by the receiving member 63 and sent onto the carry-in end portion of the discharge conveyor 50, and the defective sheet S is conveyed by the discharge conveyor 50. It is sent out from the carry-out end onto an inclined receiving table 70 provided on the downstream side thereof, and is automatically removed from the conveyance line of the non-defective sheet S.

  When the defective sheet S is fed onto the discharge conveyor 50 and the sheet following the defective sheet S is a non-defective sheet S, the control unit 65 operates the elevating cylinder 60 to raise the movable beam 56 and to move the reciprocating cylinder 49. The conveyor base 42 is moved backward by operating.

  Further, the swing cylinder 18 is operated to raise the stopper member 17, and the cylinder 31 of the shutter driving device 27 is operated to open the shutter 23.

  Therefore, the non-defective sheet S is received by the stopper member 17, and the upper surface is pushed by the air sent downward from the blower duct 21 of the blower device 20 and falls into the hopper 10. Stacked.

  As described above, when the detection sensor PH detects the defective sheet S, the discharge conveyor 50 is moved toward the carry-out end of the transport device 1 and the carry-in end is lowered. It can be automatically removed from the transfer line.

  Further, since the discharge conveyor 50 and the receiving member 63 are lowered while being advanced, and are raised while being retracted, the non-defective sheet sent before the defective sheet and the non-defective sheet following the defective sheet are transferred to the front end of the receiving member 63. It is possible to prevent damage by buffering with the part.

  Further, since the receiving member 63 and the discharge conveyor 50 support and convey the lower surface of the defective sheet S, the conveying member 63 and the discharge conveyor 50 are conveyed when the defective sheet is formed of a flat box or a pair of panels incompletely bonded. Troubles such as the box opening inside or the pair of panels hanging down causing the transport path to be caught can be prevented, and the defective box can be reliably transported without clogging. be able to.

  Further, when the non-defective sheet S is transported from the conveying device 1, since the air is blown on the upper surface of the non-defective sheet S and sent to the lower conveying line, the non-defective sheet S is not damaged. Can be sent to the transport line.

  In the embodiment, when the pass / fail discrimination sensor provided in the sheet processing step detects a defective sheet, the detection operation of the detection sensor PH is started after a predetermined time based on the defect detection signal input to the control unit 65. When the detection sensor PH detects a defective sheet, based on the detection signal input to the control unit 65, the inside of the air duct 21 is closed and the stopper member 17 is laid down. 50 and the receiving member 63 are moved forward and lowered, but when the pass / fail judgment sensor detects a defective sheet, the defective sheet is marked and a detection sensor provided at the carry-out end of the transport device 1 When the mark is detected, the detection signal is output to the control unit 65, the inside of the air duct 21 is closed, and the stopper member 17 is laid down, Luo, may be to lower the tip while advancing the discharge conveyor 50 and the receiving member 63.

  Alternatively, when the pass / fail judgment sensor detects a faulty sheet, the faulty sheet is tracked based on a detection signal output from the pass / fail judgment sensor to the control unit, and the faulty sheet reaches a predetermined position at the carry-out end portion of the transport device 1. When the air is sent, the inside of the air duct 21 may be closed, the stopper member 17 may be laid down, and the leading end may be lowered while the discharge conveyor 50 and the receiving member 63 are advanced.

  Further, in the embodiment, the receiving member 63 is lowered while being advanced with respect to the carry-out end of the transport device 1 to receive the defective sheet S sent out from the carry-out end of the transport device 1, and the defective sheet S is discharged to the discharge conveyor 50. However, the discharge conveyor 50 is omitted, and the receiving member 63 is supported so that the rear end of the receiving member 63 can be swung up and down, and the leading end of the receiving member 63 is driven up and down. The defective sheet may be lowered by the apparatus and sent out from the carry-out end of the conveying apparatus.

The front view which shows embodiment of the defective sheet removal apparatus which concerns on this invention Sectional drawing which expands and shows the air blower part of the defective sheet removal apparatus shown in FIG. The top view which shows the carrying-in end part of the discharge conveyor of the defective sheet removal apparatus shown in FIG. Partial cutaway side view of FIG. Sectional view along line VV in FIG. Partially cutaway front view showing the discharge end of the discharge conveyor of the defective sheet removing apparatus shown in FIG. Plan view of FIG. Sectional view along line VIII-VIII in FIG. Front view showing the removal state of the defective sheet

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance device 17 Stopper member 18 Oscillating device 20 Blower device 23 Shutter 27 Shutter drive device 60 Lifting cylinder (lifting device)
63 Receiving member 65 Control unit PH Detection sensor

Claims (1)

  A conveying device that conveys a sheet in one direction, a shutter that can be freely opened and closed, and a blower that blows air toward the upper surface of the sheet that is sent out from the carry-out end of the conveying device when the shutter is open, and the conveying device A stopper member for receiving and dropping the sheet fed from the unloading end of the sheet, and a tip disposed on the stopper member and supported on the unloading end side of the transport device so as to be swingable in a vertical direction, the tip of which is supported A defective sheet receiving member for receiving a defective sheet sent from the conveying device in a state positioned below a conveying line for the sheet sent from the conveying device, an elevating drive device for moving the leading end of the receiving member up and down, and a failure signal Based on the above, the shutter driving device is operated in the direction in which the shutter of the blower is closed, and the tip of the receiving member is lowered. Cormorant lifting drive apparatus for removing defective sheets comprising a controller for actuating the.

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