JP2019119565A - Paper feeder and double feeding prevention method of paper sheet body - Google Patents

Abstract

To provide a paper feeder which can reliably prevent double feeding that overlaps and feeds paper sheet bodies in a device that feeds paper sheet bodies for laminator to a laminator one by one.SOLUTION: A paper feeder includes: a suction mechanism which is provided on the upper part of a conveyance path of a paper sheet body and sucks and floats the paper sheet body by a suction fan; a conveyance mechanism which conveys the sucked and floated paper sheet body; a sensor which detects the tip of the sucked and floated paper sheet body conveyed by the conveyance mechanism; means which stops the suction of the suction fan when detecting the tip of the paper sheet body with the sensor; exhaust duct means which guides exhaust air of the suction mechanism to the lower surface of the tip of the floated paper sheet body, and maintains floating; and a ventilation path which guides a part of the exhaust air of the exhaust duct means to the lower surface of the side end side of the floated paper sheet body, and maintains floating. When the first paper sheet body is sucked and conveyed and a predetermined amount of the sucked paper sheet body is conveyed, the paper feeder stops the suction and continues conveyance by the conveyance mechanism.SELECTED DRAWING: Figure 1A

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a sheet feeding device for supplying a sheet to be laminated to a laminating machine for heat and pressure laminating film and a method for preventing double feeding of a sheet fed by the sheet feeding device.

A laminating apparatus generally applies a laminate film to the surface side of a sheet to protect a sheet or the like, or heat pastes the entire sheet with a laminate sheet and encloses it to be transparent. It is a machine covered with film.
Such a laminating apparatus is provided with an apparatus for supplying a sheet (referred to as "work" or the like) on which a document, a photograph, a figure or the like to be protected is printed. Paper sheets vary in size (size), thickness, and material (the surface friction of paper products varies depending on the manufacturing method and materials), and a large number of these paper sheets are set in a sheet feeding device to It is necessary to be sent out without sending.

  The laminating apparatus is for laminating one sheet at a time, and for example, when a part of a large number of set sheets is transported to a sheet to be conveyed, normal lamination can not be performed. Become. If the processing is not successful, the laminate film and the paper sheet to be protected will be wasted.

  Therefore, various mechanisms for preventing double feeding have been considered. For example, it is conceivable to provide a mechanism for promoting separation by applying air from a certain direction to separate the first sheet to be transported from the second sheet. In addition, it is devised that the leading end of the next sheet of paper is restricted during the delivery of the first sheet.

  Patent Document 1 discloses a paper feeding device capable of quickly separating upper and lower paper sheets. This apparatus is provided with a sheet deflection restricting member corresponding to a supply unit for separately supplying sheets one by one to a mounting table to separate the sheets.

  Patent Document 2 discloses a paper feed roller for a double feeding prevention mechanism of a paper feeding device capable of maintaining the original double feeding prevention performance for a long time even when feeding a bad paper with a large amount of paper dust generation. It is disclosed. In this case, in order to prevent double feeding, unevenness is provided on the surface of the sheet feeding roller.

  However, the mechanisms such as the paper feed device and the paper feed roller for the double feed prevention mechanism according to Patent Documents 1 and 2 do not correspond to a structure that can be coupled to the laminator device, and a mechanism for feeding the sheet without double feed to the laminator device. It is difficult to make

JP, 2013-014419, A Unexamined-Japanese-Patent No. 2004-299842

  SUMMARY OF THE INVENTION An object of the present invention is, in an apparatus for feeding a sheet of laminator sheet or the like one by one, a sheet feeding apparatus capable of reliably preventing double feeding in which sheets are stacked and delivered, and which can be easily combined with a laminator apparatus. It is to provide. Another object of the present invention is to provide a method for preventing double feeding of a sheet.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a sheet feeding apparatus for feeding a sheet, which is set by stacking a large number of sheets, one by one. A suction mechanism provided by a suction fan which is provided on a conveyance path and sucks and raises a sheet, a conveyance mechanism which conveys the sheet which has been suction-floated, and a suctioned and brought-up sheet conveyed by the conveyance mechanism. A sensor for detecting the leading edge, a means for stopping the suction of the suction fan when the leading edge of the sheet is detected by the sensor, and the exhaust of the suction mechanism are guided to the lower surface of the tip of the raised sheet. The exhaust duct means for maintaining the levitation, and an air passage for guiding a part of the exhaust of the exhaust duct means to the lower surface of the side end side of the levitated paper sheet, and maintaining the levitation The aspirated paper sheet is transported by suction, and the sucked paper sheet When it conveyed a predetermined amount, characterized in that the suction is stopped and continues the transport by the transport mechanism.
The invention according to a second aspect of the present invention is the friction member according to the first aspect, provided in the vicinity of the lower portion of a pulley for rotating the transport belt of the transport mechanism, and forming a slope giving movement habitability in the pulley direction. When the leading end of the sheet passes through the lower portion of the pulley, a pressing force to the conveying belt is generated on the sheet being conveyed, and a frictional force is applied to the lower surface of the sheet to be suctioned and conveyed. It is characterized in that a force for conveying the sheet is given even after the suction by the suction fan is stopped.
The invention according to claim 3 of the present invention is characterized in that, in the invention according to claim 1 or 2, the two suction mechanisms are provided, and the air discharged by each suction mechanism is guided in the direction of both sides of the paper sheet. I assume.
The invention according to a fourth aspect of the present invention is characterized in that, in the invention according to the first, second or third aspect, the two suction mechanisms are provided on both sides centering on the center of the sheet to be conveyed. Do.
The invention according to claim 5 of the present invention is a method for preventing double feeding of a sheet feeding device for feeding a sheet of paper set in a stack of a large number of sheets one by one. A suction mechanism that sucks and floats, a transport mechanism that sucks and transports a sucked paper sheet, a sensor that detects the leading end of the paper sheet, and an exhaust duct that sends the exhaust of the suction mechanism to the lower surface of the paper sheet A means for suctioning and conveying the paper sheet into the conveyance path, and when the leading end of the paper sheet is detected, the suction is released and the floating state is maintained by the exhaust air.

  According to the above configuration, double feeding of the sheet to the laminator can be reliably prevented, and the structure can be easily incorporated into the laminator device.

FIG. 1 is a plan view showing an embodiment of a sheet feeding device according to the present invention. FIG. 1 is a front view showing an embodiment of a sheet feeding device according to the present invention. It is a left side view showing an embodiment of a sheet feeding device according to the present invention. It is a right side view showing an embodiment of a sheet feeding device according to the present invention. It is a figure which shows the detail of the double feed cancellation | release part which comprises a part of double feed prevention mechanism. It is a top view which shows the detail of paper sheet suction and an air delivery isolation | separation mechanism. It is AA sectional drawing. It is a BB sectional view. FIG. 2 is a view for explaining the incorporation state of the sheet feeding device according to the present invention into the laminator device, where (a) is a plan view at the time of incorporation, (b) is a front view at the incorporation, and (c) is a front view of the laminator Respectively. It is a perspective view showing the state where the sheet feeding device by the present invention was built into a laminator device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1A, 1B, 1C and 1D respectively show a plan view, a front view, a left side view and a right side view showing an embodiment of a sheet feeding device according to the present invention. This figure shows a state in which a plurality of works (sheets) are set. The sheet feeding device according to the present invention can correspond to a sheet of a size such as A3, A4, B4, or B5.
The sheet feeding device 1 conveys the sheet 152 one sheet at a time, suctions the sheet 4 sheet by sheet and sucks the air taken in by the exhaust ducts 10 and 11 onto the lower surface of the tip of the sheet 4 suctioned. It has a suction / separation mechanism to guide, a sensor mechanism for detecting the transport position of the sheet 4, a table mechanism for setting the sheet, an operation unit for operating the sheet feeding device 1, and an electric circuit portion. Each of these mechanisms is incorporated in the sheet feeding device frame 35.

Four pulleys 20 are rotatably supported on the pulley shaft 25, and similarly, four pulleys 21 are rotatably supported on the pulley shaft 26. A conveyor belt (round belt) 29 is stretched between the pulleys 20 and 21 and the rotational driving force of the motor 2 is transmitted to the pulley shaft 26 by a motor connecting shaft (not shown). The sheet 4 sucked by turning on the operation switch 5a is conveyed in contact with the conveying belt. FIG. 2 shows a state in which the paper sheet 151 is pressed and conveyed by the conveyance belt 29 by the suction force.
The fans 6a and 6b are positioned between the two pulleys 20 and 20 of the transport mechanism and attached to the fan base 27, and the fan base 27 is fixed to the stay (aluminum square bar) 36 by the set screw 109 (see FIG. 3C) It is done. The lower surfaces of the fans 6a and 6b are suction ports 102 (see FIG. 3C), and the sucked air is guided to the exhaust ducts 10 and 11.

  The nozzle 103 constituting the exhaust duct is connected to the air outlet 101 (see FIG. 3A) of the fans 6a and 6b. The nozzle 103 is formed in a shape similar to a rectangular cylindrical portion which guides the direction of air sent from the fans 6a and 6b in the side direction of the apparatus to the lower surface of the sheet. Details of the shape are shown in FIGS. 3A, 3B and 3C. The nozzle 103 is attached with its length adjusted so that the fans 6a and 6b are attached to the air outlet 101 so as to be in contact with the side surface of the paper feed unit frame 35, and fixed by the nozzle fixing screws 16a and 16b.

  The front end detection sensor 8 and the rear end detection sensor 9 are attached to a stay (aluminum square bar) 36 by a sensor holding unit 31. The leading end detection sensor 8 detects the leading end portion of the paper sheet 151, and when it detects the leading end, sends out a signal for stopping suction of the fan to the electric circuit portion. The rear end detection sensor 9 detects a rear end portion of the sheet 151, and sends out a signal for activating a fan for suctioning the next sheet of the sheet sent to the laminator apparatus. .

  Guides 12 and 13 which can regulate the width direction of the paper sheet are provided on both sides of the table 14 on which the paper sheet is set, and paper of various sizes can be provided by the movement of the guides 12 and 13 in the inward and outward directions It is possible to cope with leaf size. An extension table 17 is extended on the table 14 and provided with a stopper 15 for defining the rear surface of the sheet.

  The operation unit at the top of the paper feeder frame 35 has an operation switch 5a for starting / stopping the operation, a speed switching switch 5b for switching the speed of the sheet, an emergency stop button 5c for stopping immediately when an abnormality occurs in the operation A speed controller 5d is provided to adjust the speed. Legs 30 are provided on the lower surfaces of the four corners of the sheet feeding device frame 35. Below the pulley 20, there is provided a double-feed releasing unit for pressing the leading end of the advancing suctioned sheet against the conveying belt 29. The double feed release portion includes a plate rubber 22 having a friction surface.

  FIG. 2 is a view showing the details of a double feed cancellation unit that constitutes a part of the double feed prevention mechanism. A double feed release portion is disposed along the shaft 26 below the pulley shaft 26 of the pulley 21. The rubber plate 22 is attached so as to be an inclined surface, and the plate spring 23 is provided on the lower surface of the rubber plate 22 to give the plate spring 23 upward movement habit. When the front end of the sheet passes through the double feed release unit, it plays a role of clamping the double-conveyed sheet and conveying only the sheet in contact with the conveyance belt (round belt) 29. That is, when there is a sheet of paper that is likely to be fed in double, the double feed release unit not only tears off the sheet but also exerts the pressing force of the conveying belt (round belt) 29 on the sheet being conveyed. Enables stable transportation. The rubber plate 22 has a lower friction than the round belt. In addition to this, if the brush is used instead of a rubber plate, the pressing force can be widely adjusted.

  In this figure, the sheet 151 is pressed against the conveying belt (round belt) 29 by the suction force of the fan and conveyed, and the leading edge of the sheet is guided upward by the slope of the rubber plate 22 to under the leading edge detection sensor 8 It shows the state of reaching. Until reaching this position, a suction force is working, and between the lower surface of the sheet 151 and the upper surface of the large number of sheets 152, air sucked and conducted is fed. When the leading edge detection sensor 8 detects the leading edge of the sheet, the suction and air feeding are stopped, and the sheet 151 is fed by the frictional force of the conveyance belt.

  FIGS. 3A, 3B and 3C respectively show a plan view, a cross-sectional view taken along the line A-A and a cross-sectional view taken along the line B-B showing details of the sheet suction and air delivery separation mechanism. The air outlet 101 of the fan 6 b is connected to the length adjustment unit 104. A long groove 110 is provided in a portion covering the length adjusting portion 104 of the nozzle 103, and the nozzle fixing screws 16a and 16b can be fixed to the length adjusting portion 104 by screwing through the long groove 110. The mounting position of the nozzle 103 can be adjusted so as to be in contact with the side surface of the sheet feeding device frame.

  A loosening air duct (nozzle) 103 is connected to the length adjusting unit 104 (a rectangular cylindrical section 103a has a rectangular cross section, and the same rectangular cylindrical section as the following rectangular cylindrical section) 103a and a rectangular cylindrical section 103a A rectangular tube portion 103b obtained by bending the lower portion 90 degrees downward, a rectangular tube portion 103c obtained by bending the rectangular tube portion 103b leftward (as viewed from FIG. 3A) 90 degrees, and the rectangular tube portion 103c And a rectangular tube (blow duct tip) 103d bent 90 degrees. The air from the fan 6b travels as an arrow in the duct blowing direction 108, and is further guided to the air duct tip portion 103d to reach the lower end portion of the sheet. Further, the air duct end portion 103d is a side opening, and air is sent from the side surface of the paper sheet to the back surface thereof, and air is sent between the first sheet and the next sheet.

  FIG. 4 is a view for explaining how the paper feeding device according to the present invention is incorporated into the laminator device. (A) is a top view at the time of incorporation, (b) is a front view at the time of incorporation, (c) is a front view of a laminator device. A boundary when the sheet feeding device is assembled by being fitted to the laminator device is indicated by an alternate long and short dash line. A part of the laminator device is incorporated in a state of being accommodated in the laminator coupling space of the sheet feeding device.

  FIG. 5 is a perspective view showing the sheet feeding device according to the present invention incorporated in a laminator device. As shown by dotted lines in FIG. 1A and FIG. 1B, by fitting the laminator frame 50 to the laminator connection guide 24, the sheet fed one by one from the sheet feeding device is guided by the guide 28 and the laminator device It is supplied to a predetermined position.

  Next, the operation and operation of the sheet feeding device will be described with reference to FIGS. 1A, 1B, 1C and 1D, and FIGS. 3A, 3B and 3C. A large number of sheets of paper are set on a table 14 having a sheet support portion 19. When the operation switch 5a is turned on, the motor 2 rotates the pulley shaft 26 to drive the four conveyor belts 29 wound around the pulleys 20 and 21 in the direction of the laminator device. At substantially the same time, the fans 6a and 6b are driven to start suction and introduce the sucked air into the blowing duct 103. The sheet is pressed against the conveyance belt 29 and the conveyance starts by the movement of the conveyance belt. At this time, the air in the air blowing duct 103 is blown to the air blowing duct tip portion 103d and is blown out to the back surface of the tip portion of the paper sheet. Further, the air in the blowing duct 103 is blown out also from the side surface side of the paper sheet.

  By the above operation, the intake air of the fan floats up the upper surface of the front end of the paper sheet and draws it to the conveyance belt, and the exhaust of the fan causes the front end of the paper sheet to float by blowing on the front side surface and front of the paper sheet. When the leading end of the sheet reaches the sheet rubber 22, when another sheet is continuously attached to the lower surface of the sheet being conveyed, the sheet rubber 22 prevents the sheet 2 from being attached. When the sheet advances further and the leading edge detection sensor 8 detects the leading edge of the sheet, the detection signal is sent to the electronic circuit and the fan is stopped. After that, the sheet is conveyed by the pressing force of the double feed releasing unit and the frictional force of the conveying belt. When the trailing edge of the conveyed sheet is detected by the rear end detection sensor 9, the suctioned sheet is not present in the conveyance mechanism, and the fan 6a, Drive 6b to start suction.

  Although the example which used two suction fans was shown in the above embodiment, three or more suction fans may be used, and also when providing a plurality of suction ports using one fan, the present invention is not limited. It can be implemented similarly. Further, the transport belt and the number of pulleys for rotating the transport belt can be set arbitrarily. Furthermore, a ventilation duct is provided for guiding the exhaust direction of the exhaust duct to the respective outer directions of both fans and then guiding the suction to the lower surface of the first tip of the first sheet and the side lower surface. Instead, it is also possible to provide a channel that leads directly to the lower surface of the first tip and the lower surface on the side surface side. The present invention covers all the claims including these modifications.

  It is a sheet feeding device that supplies sheets to be laminated one by one to a laminating machine that heats and crimps a laminated film.

1 sheet feeder 2 motor 3 motor connecting shaft 4, 151, 152 sheet (media)
5a Operation switch 5b Speed changeover switch 5c Emergency stop button 5d Speed controller 6a, 6b Intake fan 7 Sensor holding part 8 Tip detection sensor 9 Rear end detection sensor 10, 11 Exhaust duct part 12, 13, 28 Guide 14 Table 15, 18 Stopper 16a, 16b Nozzle fixing screw 17 Extension table 19 Paper sheet support portion 20, 21 Pulley 22 Rubber plate 23 Leaf spring 24 Laminator connection guide 25, 26 Pulley shaft 27 Fan base 29 Conveying belt (round conveying belt)
30 legs 31 sensor holding portion 35 sheet feeder frame body 36 stay (aluminum square bar)
50 Laminator Frame 101 Blower 103 Blower duct (nozzle)
103a, 103b, 103c, 103d rectangular cylinder (the tip of the air duct)
104 Length adjuster 105 Adjustment screw 106 Air flow direction mark 108 Duct air flow direction 109 Fixing screw 110 Long groove

Claims (5)

A sheet feeding device for feeding sheets of a large number of stacked sheets one by one.
A suction mechanism provided by a suction fan which is provided on the conveyance path of the sheet and which sucks and raises the sheet;
A transport mechanism for transporting the suction-lifted sheet;
A sensor for detecting the leading end of the suctioned and floated sheet conveyed by the conveyance mechanism;
A means for stopping the suction of the suction fan when the front end of the sheet is detected by the sensor;
Exhaust duct means for guiding the exhaust of the suction mechanism to the lower surface of the tip of the raised paper sheet and maintaining the floating;
And a vent path for guiding a part of the exhaust of the exhaust duct means to the lower surface of the side end of the raised paper sheet and maintaining the floating.
A sheet feeding apparatus characterized in that the first sheet is suctioned and conveyed, and when the suctioned sheet is conveyed by a predetermined amount, the suction is stopped and conveyance by the conveyance mechanism is continued. . In the sheet feeding device according to claim 1,
It has a friction member which is provided in the vicinity of the lower part of the pulley for rotating the conveyor belt of the conveyor mechanism and which forms a slope giving movement habit toward the pulley.
When the front end of the sheet passes through the lower portion of the pulley, a pressing force against the conveying belt is generated on the sheet being conveyed, a frictional force is applied to the lower surface of the sheet to be suctioned and conveyed, and adsorption by the suction fan A sheet feeding device characterized by applying a force to convey a sheet even after the sheet is stopped. In the sheet feeding device according to claim 1 or 2,
There are two suction mechanisms,
A sheet feeding device characterized in that air discharged by each suction mechanism is guided in the direction of both ends of a sheet. In the sheet feeding device according to claim 1, 2 or 3,
A sheet feeding apparatus characterized in that the two suction mechanisms are provided on both sides of a center of a sheet to be conveyed. A method for preventing double feeding of a sheet feeding device, which feeds sheets of a large number of stacked sheets one by one.
A suction mechanism for suctioning and raising the sheet on the conveyance path of the sheet;
A transport mechanism that sucks and transports the sucked paper sheet;
A sensor that detects the leading edge of the sheet;
Exhaust duct means for sending the exhaust of the suction mechanism to the lower surface of the paper sheet;
The paper sheet is sucked into the conveyance path and conveyed, and when the leading end of the paper sheet is detected, the suction is released, and double feeding is prevented by conveying while holding the floating by the exhaust air. How to prevent double delivery.