JP2017197849A - Used paper regeneration treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a used paper regeneration treatment apparatus that can stably perform smoothing of used paper and does not apply an excess load on a pressure roller.SOLUTION: A used paper regeneration treatment apparatus includes a paper-making part 13 for papering wet paper 12 from a pulp suspension, a drying part 14 for drying the wet paper 12 to form dry paper, and a calendar part 200 that is located on a downstream side of the drying part 14 in a paper transporting direction and smooths the dry paper 61 to form regenerated paper, in which the calendar part 200 makes, among a pair of pressure rollers 201 and 202 arranged faced in a vertical direction via a paper transportation path, one pressure roller 201 form a stationary roller 201b of which position is fixed and the other pressure roller 202 form a pressure roller 202b located freely accessible to the stationary roller 201b, an energization part 203 energizes the pressure roller 202b toward the stationary roller 201b, and a regulation part 202d forms a regulated clearance t narrower than a finish paper thickness of the regenerated paper between the stationary roller 201b and the pressure roller 202b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a used paper recycling apparatus that can be installed in an office or the like where waste paper is generated to recycle the paper, and particularly relates to a calendar technology.

  Conventionally, in the paper making process of making pulp suspension containing waste paper pulp with a paper making wire, the wet paper made by paper is pressed against the drying roller with the paper making wire, or the wet paper is pressed against the drying roller with a felt canvas belt and dried. I am letting. At this time, the mesh of the paper making wire or the mesh of the canvas belt remains as an uneven impression on the wet paper. This indentation becomes a factor that hinders printing, and it is difficult for ink or toner to get on the recessed portion, resulting in a reduction in the quality of the finished print. In addition, the writing quality when handwritten with a pen or the like also deteriorates.

  For this reason, for example, in the technique described in Patent Document 1, the drying unit includes a steel lower conveyance belt that is stretched between a plurality of rollers and a drying roller having a heater therein, and a plurality of rollers and a drying roller. It has an upper transport belt made of resin that is stretched between them, and the lower transport belt and the upper transport belt overlap on the surface of the drying roller with the wet paper sandwiched between them, and press the dry roller to dry the wet paper. ing.

  In the calendar unit, the press roller is disposed at a position facing the drying roller, and the press roller is provided so as to be displaceable between a press position where the press roller is in contact with the wet paper and a retreat position where the press roller is separated from the wet paper. The paper surface is smoothed by pressing.

JP2012-1820

  As described above, when the wet paper is pressed with the press roller during the process of pressing the wet paper onto the drying roller and dried, the wet paper is easily smoothed and the press pressure of the press roller is relatively small. There is an advantage that it is good, but when wet paper that contains moisture is pressed, the fibers of the wet paper flow out due to the movement of moisture in the wet paper, and the phenomenon that the tip of the wet paper rolls around the press roller, etc. There are unstable elements.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a used paper recycling apparatus that can stably smooth recycled paper and that does not give an excessive load to a press roller. To do.

  In order to solve the above-described problems, the used paper recycling apparatus of the present invention includes a paper making unit that makes wet paper from a pulp suspension, a drying unit that dries the wet paper into dry paper, and dries in the paper conveyance direction. A calendering unit that smoothes dry paper and forms recycled paper, and the calendering unit is one of a pair of press rollers arranged vertically opposite to each other via a paper conveyance path. The press roller forms a fixed roller whose position is fixed, the other press roller forms a pressure roller that can be moved close to and away from the fixed roller, and the urging unit urges the pressure roller toward the fixed roller. The regulating portion forms a regulating gap narrower than the finished paper thickness of the recycled paper between the fixed roller and the pressure roller.

  In the used paper recycling apparatus of the present invention, the paper recycling direction has a cutting unit for cutting dry paper into a predetermined size downstream of the drying unit in the paper conveyance direction, and the calendar unit is arranged downstream of the cutting unit in the paper conveyance direction. Features.

  In the used paper recycling apparatus of the present invention, the calendar unit has a guide unit that guides the dry paper to the regulation gap on the upstream side of the pair of press rollers in the paper conveyance direction, and the guide unit has one of the leading edges of the dry paper. It is characterized by being along the outer peripheral surface of the press roller.

  As described above, according to the present invention, the dry paper after drying the wet paper is pressed between the fixed roller and the pressure roller under the pressure applied by the urging unit, thereby The unevenness can be leveled and smoothed to improve the quality of the printed ink by improving the printing ink and toner, and the writing quality of handwriting with a pen can be improved. In addition, it is possible to prevent the occurrence of an event in which fibers generated when pressing in a conventional wet paper state or an event in which the wet paper web is wound around the press roller.

  In addition, by securing a regulation gap narrower than the finished paper thickness of the recycled paper between the fixed roller and the pressure roller, the dry paper is smoothly guided between the fixed roller and the pressure roller, and the leading edge is bent and wrinkled. Occurrence can be prevented, excessive press against dry paper can be prevented, and the quality of recycled paper can be stabilized. Furthermore, it is possible to prevent excessive pressure from acting between the fixed roller and the pressure roller, reducing the load applied to the press roller, especially the pressure roller on the pressure receiving side, and reducing the mechanical load of the device. As a result, energy consumption during operation can be reduced.

By arranging the calendar part on the downstream side of the cutting part, there is no situation in which the paper transport is interrupted while the dry paper passes through the calendar part, and the paper surface can be smoothed in the paper transport direction evenly. .
In other words, the paper is in a continuous paper state on the transport path from the paper making section to the cutting section, and when the dry paper is cut into recycled paper of a predetermined size by the cutting section, the paper is not transported. Pause. For this reason, when the calendar part is arranged upstream from the cutting part, the conveyance of the dry paper is temporarily stopped during the smoothing process, and unevenness such as unnecessary lines on the paper surface is likely to occur. However, since it is a cut cut sheet downstream from the cutting section, it is not affected by the temporary stop of the conveyance that occurs at the time of cutting, and is continuous without interruption to the dry paper that passes through the calendar section. Smoothing treatment can be performed.

  Also, in the calender unit located upstream of the cutting unit, once wrinkles occur on the dry paper, it is continuous paper, so it can be restored to normal until the press roller pressure is released and the press rollers are widened to correct the wrinkles. In the meantime, the generation of soot continues. However, since a calendar is placed downstream of the cutting part and the dry paper sheet is pressed, even if a single dry paper sheet is wrinkled, As the leading edge of the next single sheet of dry paper that has not been wrinkled is introduced into the regulation gap, the press roller pressure is not released. Both can return to normal.

  In addition, the guide portion causes the leading edge of the dry paper to follow the outer peripheral surface of one of the press rollers, so that the leading edge of the dry paper is linearly corrected following the outer peripheral surface of the press roller, and the leading edge of the dry paper The edge is preliminarily stretched before being introduced into the regulation gap, and the occurrence of wrinkles that may occur in the dry paper when introduced into the regulation gap can be suppressed.

The front view which shows the calendar part in embodiment of this invention Sectional drawing which shows the calendar part in the same embodiment Schematic diagram showing a used paper recycling apparatus in the same embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 3, the paper making unit 13 makes the wet paper 12 from the deinked pulp suspension, and includes a paper making wire 42 formed of a mesh belt wound around a plurality of rollers 41. And a head box 43 for pouring the deinked pulp suspension onto the papermaking wire 42.

  The endless track of the paper making wire 42 includes an outward path portion from the head box 43 to a later-described drying roller 49, a transition portion that covers a part of the drying roller 49, and a return path portion that returns from the drying roller 49 to the head box 43. .

  In the forward path portion of the papermaking wire 42, a draining portion 44 that slides on the lower surface of the papermaking wire 42 and drains water from the lower surface of the papermaking wire 42 near the head box 43 on the lower side of the papermaking wire 42, and the papermaking wire 42 A suction device 45 for sucking moisture from the wet paper 12 is provided.

  Further, on the downstream side of the suction device 45, a plurality of squeezing rollers 41a and 41b are located with the paper making wire 42 interposed therebetween, and the wet paper 12 on the paper making wire 42 passing between both rollers by the squeezing rollers 41a and 41b. Squeeze. Assuming that the moisture content of the wet paper 12 immediately after being supplied from the head box 43 to the papermaking wire 42 is 100%, the wet paper that has passed through the squeeze rollers 41a and 41b has a moisture content of 60 to 65%.

  The drying unit 14 dries the dehydrated wet paper 12, and a canvas belt 51 in which a part of a drying roller 49 incorporating a heating device is wound around a plurality of rollers 50 is dried on a part of an endless track. The wet paper 12 is sandwiched between the canvas belt 51 and the outer peripheral surface of the drying roller 49 in the drying unit 14, and the wet paper 12 is dried by the drying roller 49.

The dried dry paper 61 is separated from the canvas belt 51 by the scraper 111 at the forward end position of the canvas belt 51 and guided to the finish 15.
The finishing section 15 performs a finishing process on the continuous paper 61 obtained by drying the wet paper 12, and discharges the obtained cut paper 62 to the paper receiving section 63. As the cutting unit, a metal cutter device 60 and a slitter device 112 for cutting the dry paper 61 into sheet paper of a predetermined size are provided.

  On the downstream side in the paper transport direction of the drying unit 14, between the cutter device 60 and the slitter device 112 of the cutting unit, the calendar unit 200 and the cut sheet paper that smoothes the dry paper 61 of the cut paper into the recycled paper 62. A decurling unit 300 for correcting the curling of the dry paper 61 is arranged.

  As shown in FIGS. 1 and 2, the calendar unit 200 includes a pair of press rollers 201 and 202 that are arranged to face each other vertically via a paper conveyance path. One press roller 201 located above constitutes a fixed roller 201b on the driving side, and the rotating shaft 201a is fixed at a predetermined position, and the other press roller 202 constitutes a pressure roller 202b on the driven side, and the rotating shaft 202a. Are arranged so as to be able to approach and separate from the fixed roller 201b.

  Below the pressure roller 202b, an urging portion 203 that urges the pressure roller 202b toward the fixed roller 201b is provided. The urging unit 203 includes a disc spring 203a that applies an urging force to the holding unit 202c of the pressure roller 202b, and a push bolt 203b that adjusts the urging force of the disc spring 203a.

  The holding portion 202c of the pressure roller 202b is provided with a restriction portion 202d that forms a restriction gap t between the fixed roller 201b and the pressure roller 202b to prevent the fixed roller 201b and the pressure roller 202b from coming into contact with each other. The regulation gap t is narrower than the finished paper thickness of the recycled paper 62 and is about 0.03 mm, and the gap size set in common for the recycled paper 62 having a finished paper thickness in the range of 0.1 mm to 0.3 mm. It is.

  The calendar unit 200 has a guide unit 204 on the upstream side of the press rollers 201 and 202 in the paper conveyance direction. The guide unit 204 guides the dry paper 61 to the regulation gap t. The upper guide 204a and the lower guide 204b. The gap between the upper guide 204a that forms a downward gradient toward the downstream side in the paper conveyance direction and the lower guide 204b that forms an upward gradient toward the downstream side in the paper conveyance direction is narrower toward the downstream side in the paper conveyance direction. The downstream edge of the lower guide 204b is located downstream of the downstream edge of the upper guide 204a in the paper transport direction, and is opposed to the outer peripheral surface of the fixed roller 201b at a position above the regulation gap t.

  In the above configuration, the wet paper 12 made by the paper making unit 13 is dried by the drying unit 14 and sent to the finishing unit 15 as the dry paper 61. The finishing unit 15 cuts the length of the dry paper 61 in the paper conveyance direction into a predetermined size by the cutter device 60 of the cutting unit to form a cut sheet, and the dry paper 61 is guided to the calendar unit 200 for smoothing processing. Then, after the curl is corrected by the decurling unit 300, the width of the cut paper 61 is cut into a predetermined size by the slitter device 112 to obtain the recycled paper 62.

  In the calendar unit 200, the guide unit 204 guides the wet paper 61 to the regulation gap t by the upper guide 204a and the lower guide 204b. At this time, the lower guide 204b moves the leading edge of the wet paper 61 along the outer peripheral surface of the fixed roller 201b, so that the leading edge of the dry paper 61 is linearly corrected following the outer peripheral surface of the fixed roller 201b. The leading edge of 61 is preliminarily extended before being introduced into the regulating gap t. As a result, generation of wrinkles that may occur in the dry paper 61 when it is introduced into the regulation gap t can be suppressed.

  Then, the dry paper 61 is smoothly guided to the regulation gap t between the fixed roller 201b and the pressure roller 202c as the fixed roller 201b rotates, and in the state of the dry paper 61, the fixed roller 201b and the pressure roller 202c Pressed between. At this time, pressing is performed under the pressure applied to the pressure roller 202b by the disc spring 203a of the urging portion 203, and the space between the fixed roller 201b and the pressure roller 202b is maintained in the restriction gap t by the restriction portion 202d.

  As a result, the dry paper 61 is pressed without causing bending of the leading edge or wrinkles, and without receiving excessive pressure, and smoothes the surface irregularities of the paper. In addition, since the occurrence of the phenomenon of fibers flowing out when pressing in the conventional wet paper state and the event of the wet paper web leading end being wound around the press roller can be prevented, the quality of the recycled paper 62 can be stabilized.

  Furthermore, it is possible to prevent an excessive pressurizing force from acting between the fixed roller 202b and the pressure roller 202c, and to suppress the load applied to the press rollers 201 and 202, particularly the pressure-receiving side fixed roller 202b. The energy consumption during operation can be reduced by reducing the mechanical load.

  By arranging the calendar unit 200 on the downstream side of the cutter device 60 of the cutting unit, there is no situation in which the conveyance of the paper is interrupted while the dry paper 61 passes through the calendar unit 200, and the paper surface is evenly smoothed. Can be implemented.

  That is, on the conveyance path from the paper making unit 13 through the drying unit 14 to the cutter device 60 of the cutting unit, the paper is in a continuous paper state, and when the dry paper 61 is cut into a predetermined size by the cutting unit, Paper transport is temporarily stopped. For this reason, when the calendar unit 200 is arranged on the upstream side of the cutting unit, the conveyance of the dry paper 61 is temporarily stopped during the smoothing process, and unevenness such as unnecessary lines on the paper surface easily occurs. However, since it is a cut sheet on the downstream side from the cutting unit, it is not affected by the temporary stop of the conveyance that occurs at the time of cutting, and continuously without interruption to the dry paper 61 that passes through the calendar unit 200. Smoothing processing can be performed.

  In addition, in the calendar unit 200 arranged on the upstream side of the cutting unit, once the dry paper 61 is wrinkled, it is a continuous paper. It cannot be restored to normal until it is spread out and the wrinkles are corrected.

  However, in the calendar unit 200 arranged on the downstream side of the cutting unit, the cut dry paper 61 of the cut sheet is pressed, so that even if a flaw occurs in the cut dry sheet 61, it is conveyed next. As a result of the disconnection with the coming single-sheet dry paper 61, wrinkles do not continue, and the leading edge of the next single-sheet dry paper 61 without wrinkles is introduced into the regulation gap t. The normal state can be restored without releasing the pressure applied by the press rollers 201 and 202.

DESCRIPTION OF SYMBOLS 12 Wet paper 13 Paper making part 14 Drying part 15 Finishing part 41 Roller 41a, 41b Drawing roller 42 Paper making wire 43 Head box 44 Draining part 45 Suction device 49 Drying roller 50 Roller 51 Canvas belt 60 Cutter device 61 Dry paper 62 Recycled paper 63 Paper Receiving part 200 Calender part 201, 202 Press roller 201a Rotating shaft 201b Fixed roller 202a Rotating shaft 202b Pressure roller 202c Holding part 202d Restricting part 203 Energizing part 203a Belle spring 203b Pushing bolt 204 Guide part 204a Upper guide 204b Lower guide t Restriction gap

Claims (3)

A paper making unit for making wet paper from a pulp suspension, a drying unit for drying wet paper to form dry paper, and a downstream side of the drying unit in the paper transport direction, smoothing the dry paper, With a calendar section
The calendar part is a fixed roller in which one press roller is fixed in position, and the other press roller approaches the fixed roller. There is a pressure roller that is arranged so as to be separable, the urging unit urges the pressure roller toward the fixed roller, and the regulating unit has a regulation gap narrower than the finished paper thickness of the recycled paper between the fixed roller and the pressure roller A used paper recycling apparatus characterized by forming a paper.   2. The cutting unit according to claim 1, further comprising a cutting unit that cuts the dry paper into a predetermined size in the paper transport direction on the downstream side of the drying unit, and the calendar unit is disposed on the downstream side of the cutting unit in the paper transport direction. Waste paper recycling processor.   The calendar unit has a guide unit that guides the dry paper to the regulation gap on the upstream side of the press roller pair in the paper conveyance direction, and the guide unit causes the leading edge of the dry paper to be along the outer peripheral surface of one of the press rollers. The used paper recycling apparatus according to claim 1 or 2, characterized by the above-mentioned.

Images