JP6764674B2 - Waste paper recycling equipment - Google Patents

Description

The present invention relates to a waste paper recycling apparatus capable of recycling paper by installing it in an office or the like where waste paper is generated, and more specifically relates to a calendar technique.

Conventionally, in the papermaking process of making a pulp suspension containing waste paper pulp with a papermaking wire, the papermaking wet paper is pressed against a drying roller with a papermaking wire, or the wet paper is pressed against a drying roller with a felt cambus belt to dry. I'm letting you. At this time, traces of the mesh of the papermaking wire or the mesh of the canvas belt remain on the wet paper as indentations of unevenness. These indentations become a factor that hinders printing, making it difficult for ink and toner to get on the dents, and the print quality deteriorates. In addition, the writing quality when handwriting with a pen or the like deteriorates.

For this reason, for example, in the technique described in Patent Document 1, the drying portion includes a steel lower transport belt spanned between a plurality of rollers and a drying roller provided with a heater inside, and a plurality of rollers and a drying roller. It has a net-like upper transport belt that is hung 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 are pressed against the drying roller to dry the wet paper. ing.

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

JP 2012-1820

As described above, if the wet paper is pressed by the press roller in the middle of the process of pressing the wet paper against the drying roller to dry it, the wet paper can be easily smoothed and the press pressure of the press roller is relatively small. Although it has the advantage of being good, when a wet paper containing moisture is pressed, the fibers of the wet paper flow out due to the movement of the moisture in the wet paper, and the tip of the wet paper wraps around the press roller. There is an unstable element.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a recycled paper recycling processing apparatus capable of stably smoothing recycled paper and not giving an excessive load to a press roller. To do.

In order to solve the above problems, the used paper recycling apparatus of the present invention has a paper making section for making wet paper from a pulp suspension, a drying section for drying wet paper to make dry paper, and drying in the paper transport direction. It is located on the downstream side of the section and has a cutting section that cuts dry paper to a predetermined size, and a calender section that is located on the downstream side of the cutting section in the paper transport direction and smoothes the dry paper to make recycled paper. Of a pair of press rollers arranged vertically facing each other via a paper transport path, one press roller forms a fixed roller with a fixed position, and the other press roller can approach and separate from the fixed roller. The pressure roller is arranged in, and the urging part urges the pressure roller toward the fixed roller, and the regulation part forms a regulation gap narrower than the finished paper thickness of recycled paper between the fixed roller and the pressure roller. It is characterized by doing.

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

As described above, according to the present invention, the dry paper after the wet paper is dried is pressed between the fixed roller and the pressure roller under the pressing force applied by the urging portion to obtain the surface of the paper. By smoothing and smoothing the unevenness, it is possible to improve the printing ink and toner, improve the print finish quality, and improve the writing quality of handwriting with a pen or the like. In addition, it is possible to prevent the occurrence of the outflow of fibers that occurs when pressing in the conventional wet paper state and the event that the tip of the wet paper wraps around the press roller.

Furthermore, by ensuring a regulation gap between the fixed roller and the pressurized roller, which is narrower than the finished paper thickness of the recycled paper, the dry paper is smoothly guided between the fixed roller and the pressurized roller, and the tip edge is bent or wrinkled. It is possible to prevent the occurrence, prevent excessive pressing on dry paper, and stabilize the quality of recycled paper. Furthermore, it is possible to prevent excessive pressing force from acting between the fixed roller and the pressure roller, suppress the load applied to the press roller, especially the fixed roller on the pressure receiving side, and reduce the mechanical load as a device. This can reduce energy consumption during operation.

By arranging the calendar portion on the downstream side of the cutting portion, the paper transport is not interrupted while the dry paper passes through the calendar portion, and the paper surface can be smoothed evenly in the paper transport direction. ..
That is, the paper is in the state of continuous paper on the transport path from the papermaking section to the cutting section through the drying section, and when the cutting section cuts the dry paper into recycled paper of a predetermined size, the paper is transported. Pause. Therefore, when the calendar portion is arranged on the upstream side of the cutting portion, the transport of the dry paper is temporarily stopped during the smoothing process, and unevenness such as unnecessary lines is likely to occur on the paper surface. However, since the cut sheet is cut on the downstream side of the cutting section, it is not affected by the temporary suspension of transportation that occurs during cutting, and the dry paper passing through the calendar section is continuously uninterrupted. Can be smoothed.

In addition, in the calendar section located on the upstream side of the cutting section, once wrinkles occur on the dry paper, since it is continuous paper, the pressing force of the press rollers can be released and the space between the press rollers can be widened to correct the wrinkles. However, wrinkles continue to occur during that time. However, since the calendar is placed on the downstream side of the cutting section and the dry paper of the single sheet is pressed, even if wrinkles occur on the dry paper of a single sheet, the dry paper of the single sheet to be transported next Wrinkles do not continue due to the disconnection between the gaps, and the tip edge of the next sheet of dry paper without wrinkles is introduced into the regulation gap, so that the pressing force of the press roller is not released. Both can return to the normal state.

Further, when the guide portion aligns the tip edge of the dry paper with the outer peripheral surface of either press roller, the tip edge of the dry paper is linearly straightened following the outer peripheral surface of the press roller, and the tip of the dry paper is straightened. The edges are preliminarily stretched before being introduced into the regulated gap, which can reduce the occurrence of wrinkles that may occur on the dry paper when introduced into the regulated gap.

Front view showing the calendar part in the embodiment of the present invention Sectional drawing which shows the calendar part in the same embodiment Schematic diagram showing a waste 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 papermaking section 13 is used to make a wet paper 12 from a deinked pulp suspension, and is a papermaking wire 42 composed of a mesh-shaped belt wound around a plurality of rollers 41. Has a headbox 43 for pouring the deinked pulp suspension onto the papermaking wire 42.

The endless track of the papermaking wire 42 includes an outward path portion from the head box 43 to the drying roller 49 described later, a transition portion covering a part of the drying roller 49, and a return path portion returning from the drying roller 49 to the head box 43. ..

The outbound portion of the papermaking wire 42 includes a drainer 44 that slides against the lower surface of the papermaking wire 42 and drains water from above the lower surface of the papermaking wire 42 near the head box 43 on the lower side of the papermaking wire 42, and a papermaking wire 42. A suction device 45 for sucking water from the wet paper 12 is provided.

Further, on the downstream side of the suction device 45, a plurality of drawing rollers 41a and 41b are located so as to sandwich the papermaking wire 42, and the wet paper 12 on the papermaking wire 42 passing between both rollers by the drawing rollers 41a and 41b. Squeeze. Assuming that the water 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 drawing rollers 41a and 41b has a water content of 60-65%.

The drying unit 14 dries the dehydrated wet paper 12, and a cambus belt 51 in which a part of a drying roller 49 having a built-in heating device is wound around a plurality of rollers 50 is dried by a part of an endless orbit. The wet paper 12 is sandwiched between the cambus belt 51 and the outer peripheral surface of the drying roller 49 in the drying portion 14, and the wet paper 12 is dried by the drying roller 49.

The dried dry paper 61 is peeled off from the canvas belt 51 by the scraper 111 at the end position of the outward path of the canvas belt 51 and guided to the finishing 15.
The finishing portion 15 performs a finishing step on the dry paper 61 of the continuous paper obtained by drying the wet paper 12, and discharges the obtained recycled paper 62 of the cut sheet paper to the paper receiving unit 63. As a cutting portion, a metal cutter device 60 and a slitter device 112 that cut the dry paper 61 into a cut sheet of a predetermined size are provided.

On the downstream side of the drying section 14 in the paper transport direction, between the cutter device 60 and the slitter device 112 of the cutting section, the calender section 200 and the sheet sheet that smooth the dry sheet 61 of the cut sheet to form the recycled paper 62. A decal portion 300 for correcting the curl of the dry paper 61 is arranged.

As shown in FIGS. 1 and 2, the calendar unit 200 has a pair of press rollers 201 and 202 that are vertically opposed to each other via a paper transport path. One press roller 201 located above forms a fixed roller 201b on the drive side and fixes the rotating shaft 201a at a predetermined position, and the other press roller 202 forms a pressure roller 202b on the driven side and the rotating shaft 202a. Are arranged so as to be close to and separated from the fixed roller 201b.

Below the pressurizing roller 202b, an urging portion 203 for urging the pressurizing roller 202b toward the fixed roller 201b is provided. The urging portion 203 includes a disc spring 203a that applies an urging force to the holding portion 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 regulation portion 202d that forms a regulation 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, about 0.03 mm, and is a gap size commonly set for the recycled paper 62 having a finished paper thickness in the range of 0.1 mm to 0.3 mm. Is.

The calendar section 200 has a guide section 204 on the upstream side of the press rollers 201 and 202 in the paper transport direction, and the guide section 204 guides the dry paper 61 to the regulation gap t, and the upper guide 204a and the lower guide It consists of 204b. The gap between the upper guide 204a, which has a downward slope toward the downstream side in the paper transport direction, and the lower guide 204b, which has an upward slope toward the downstream side in the paper transport direction, becomes narrower toward the downstream side in the paper transport direction. The downstream side edge of the lower guide 204b is located downstream of the downstream side edge of the upper guide 204a in the paper transport direction, and faces 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 section 13 is dried by the drying section 14 and sent to the finishing 15 as the dry paper 61. In the finishing portion 15, the length of the dry paper 61 in the paper transport direction is cut into a predetermined size by the cutter device 60 of the cutting portion to form a cut sheet, and the dry paper 61 is guided to the calendar portion 200 for smoothing processing. Then, after the curl is corrected by the decal portion 300, the width of the dry paper 61 of the cut sheet is cut into a predetermined size by the slitter device 112 to form the recycled paper 62.

In the calendar portion 200, the guide portion 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 aligns the tip edge of the wet paper 61 along the outer peripheral surface of the fixed roller 201b, so that the tip edge of the dry paper 61 is linearly straightened following the outer peripheral surface of the fixed roller 201b, and the dry paper is straightened. The tip edge of 61 is preliminarily stretched before being introduced into the regulation gap t. As a result, it is possible to suppress the occurrence of wrinkles that may occur on the dry paper 61 when it is introduced into the regulation gap t.

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 the fixed roller 201b and the pressure roller 202c are in the state of the dry paper 61. Pressed between. At this time, the disc spring 203a of the urging unit 203 presses under the pressing force applied to the pressure roller 202b, and the regulation unit 202d maintains the space between the fixed roller 201b and the pressure roller 202b in the regulation gap t.

As a result, the dry paper 61 is pressed without bending or wrinkling of the tip edge and without receiving excessive pressure, and the unevenness of the paper surface is smoothed and smoothed. In addition, the quality of the recycled paper 62 can be stabilized because it is possible to prevent the occurrence of the outflow of fibers that occurs when pressing in the conventional wet paper state and the event that the tip of the wet paper wraps around the press roller.

Further, it is possible to prevent an excessive pressing force from acting between the fixed roller 202b and the pressure roller 202c, and suppress the load applied to the press rollers 201 and 202, particularly the fixed roller 202b on the pressure receiving side, as a device. The mechanical load can be reduced to reduce energy consumption during operation.

By arranging the calendar portion 200 on the downstream side of the cutter device 60 of the cutting portion, the paper transport is not interrupted while the dry paper 61 passes through the calendar portion 200, and the smoothing of the paper surface is evenly performed. Can be implemented.

That is, the paper is in the state of continuous paper on the transport path from the papermaking section 13 through the drying section 14 to the cutter device 60 of the cutting section, and when the dry paper 61 is cut to a predetermined size by the cutting section, Paper transport is paused. Therefore, when the calendar portion 200 is arranged on the upstream side of the cutting portion, the transport of the dry paper 61 is temporarily stopped during the smoothing process, and unevenness such as unnecessary lines is likely to occur on the paper surface. However, since it is a single sheet on the downstream side of the cutting section, it is not affected by the temporary suspension of transportation that occurs during cutting, and the dry paper 61 passing through the calendar section 200 is continuously uninterrupted. A smoothing process can be applied.

Further, in the calendar portion 200 arranged on the upstream side of the cutting portion, once wrinkles are generated on the dry paper 61, since it is a continuous paper, the pressing force of the press rollers 201 and 202 is released and the space between the press rollers 201 and 202 is released. It cannot be restored to normal until it is spread and the wrinkles are repaired, and wrinkles continue to occur during that time.

However, in the calender section 200 arranged on the downstream side of the cutting section, the dry paper 61 of the cut sheet is pressed, so that even if wrinkles occur on the dry sheet 61 of a certain sheet, it is conveyed next. Wrinkles do not continue due to the disconnection between the dry paper 61 of the coming single sheet, and the tip edge of the dry paper 61 of the next single sheet without wrinkles is introduced into the regulation gap t. , The normal state can be restored without releasing the pressing force of the press rollers 201 and 202.

12 Wet paper 13 Paper making part 14 Drying part 15 Finishing part 41 Roller 41a, 41b Squeezing roller 42 Paper making wire 43 Headbox 44 Draining part 45 Suction device 49 Drying roller 50 Roller 51 Cambus belt 60 Cutter device 61 Dry paper 62 Recycled paper 63 Paper Receiving part 200 Calendar part 201, 202 Press roller 201a Rotating shaft 201b Fixed roller 202a Rotating shaft 202b Pressurizing roller 202c Holding part 202d Restricting part 203 Biasing part 203a Countersunk spring 203b Push bolt 204 Guide part 204a Upper guide 204b Lower guide t Regulation gap

Claims (2)

A papermaking section for making wet paper from a pulp suspension, a drying section for drying wet paper to make dry paper, and a cutting section located downstream of the drying section in the paper transport direction to cut dry paper to a predetermined size. It is located on the downstream side of the cutting part in the paper transport direction, and has a calender part that smoothes dry paper to make recycled paper.
The calendar unit is a pair of press rollers arranged vertically and vertically via a paper transport path. One press roller forms a fixed roller with a fixed position, and the other press roller approaches the fixed roller. The pressure rollers are arranged so that they can be separated from each other. The urging part urges the pressure rollers toward the fixed rollers, and the regulation part between the fixed rollers and the pressure rollers is narrower than the finished paper thickness of the recycled paper. A used paper recycling device characterized by forming. The calendar portion has a guide portion that guides the dry paper to the regulation gap on the upstream side of the press roller pair in the paper transport direction, and the guide portion has the tip edge of the dry paper along the outer peripheral surface of either one of the press rollers. The used paper recycling processing apparatus according to claim 1 .

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