JP6592694B2 - Waste paper processing apparatus and waste paper processing method - Google Patents

Description

  The present invention relates to a used paper processing apparatus and a used paper processing method.

There is known a method in which when used paper is recycled, it is stirred with a stirring blade together with water in a pulper and disaggregated. Patent Document 1 below discloses a technique in which water is supplied from a water supply unit and the stirring blade is immersed in the liquid in the stirring tank when the rotation speed of the stirring blade is increased during the stirring process.

Japanese Patent No. 5499263

It is desirable that the recycled paper to be recycled is separated before processing to remove incompatible products. However, rarely, foreign matter such as cellophane tape or plastic sticky notes is affixed to the waste paper to be processed, and the waste paper processing may be started without noticing that fact. Such foreign matter floats in the mixed liquid of waste paper and water and is stirred without being dissolved. And when the disaggregation process of used paper is complete | finished and sent to a downstream from a stirring tank, piping and a valve | bulb may be clogged with a foreign material. In addition, if foreign matter is sent to a downstream apparatus, that is, a deinking apparatus or a papermaking apparatus, there is a possibility of causing a malfunction or failure of the apparatus.

The present invention solves the above-described problems, and an object of the present invention is to provide a used paper processing apparatus and a used paper processing method capable of suppressing foreign matters mixed during the disaggregation processing from being sent to the downstream side.

In order to achieve the above object, a used paper processing apparatus according to the present invention includes a stirring tank provided with a stirring blade that stirs waste paper together with water, and a drive unit that rotationally drives the stirring blade. , Rutotomoni the catching portion for locking the foreign matter mixed in the stirred vessel is provided, disposed flat portion in a predetermined range of at least the center of rotation near the the catching portion, projecting upward from the planar portion Protrusions are provided.

And, the collision detecting portion is provided with an oblique portion which is formed on the upward slope toward the rotation direction ahead of the stirring blade.

Further, the撹拌翼planar portion is provided in a predetermined range of at least the rotational center vicinity of the catching part has a cutout portion formed by cutting a flat section.

Furthermore, before Ki構 formed, the notch portion is provided adjacent to the protruding portion.

Further, in each of the above-described configurations, the stirring blade extends from the center of rotation toward the inner wall of the stirring tank, and is provided with a blade portion that is formed at least partially discontinuously in the circumferential direction. The front end edge in the rotational direction of the discontinuous portion of the blade portion includes a convex portion whose outer peripheral side in the radial direction protrudes forward in the rotational direction from the center side.

Further, in each of the above-described configurations, the stirring blade extends from the center of rotation toward the inner wall of the stirring tank, and is provided with a blade portion that is formed at least partially discontinuously in the circumferential direction. The angle formed by the front edge of the rotation direction in the range from the predetermined radial position of the discontinuous portion of the blade portion to the outer peripheral side by a predetermined amount and the rotation direction of the stirring blade at the predetermined position intersect with each other at 110 ° or less. The

Paper processing method according to the present invention, together with the used paper is agitated in a stirred tank by the stirring blades with water, then lock the foreign matters mixed in the stirring vessel to the catching portion provided on the stirring blades, stirring tank The stirrer blade is rotated in the opposite direction to that during the disaggregation process until the waste paper pulp liquid produced in step 1 is taken out of the stirrer tank .

According to the used paper processing apparatus according to the present invention, stirring blade, Rutotomoni be the catching portion for locking the foreign matter mixed in the stirred tank is provided, the planar portion is provided in a predetermined range of at least the rotational center vicinity, Since the foreign matter locking portion includes a protruding portion that protrudes upward from the flat portion, the foreign matter can be easily locked to the protruding portion.

Moreover, since the protrusion part was provided with the oblique part formed in the up-slope toward the rotation direction front of the stirring blade , the foreign substance can be easily locked to the oblique part.

The stirring blade is provided with a flat portion at least in a predetermined range near the rotation center, and the foreign matter locking portion includes a cutout portion in which the flat portion is cut out. Therefore, even when the rotation speed of the stirring blade is increased, the stirring blade It is possible to make it difficult for air to enter underneath.

When the notch is provided adjacent to the protrusion, the liquid can be circulated to the notch while the foreign matter mixed in the liquid stored in the stirring tank is locked to the protrusion. This can reduce the load on the drive unit.

Furthermore, the stirring blade extends from the center of rotation toward the inner wall of the stirring tank, and is provided with a blade portion that is formed at least partially discontinuously in the circumferential direction. When the front end edge in the rotational direction of the continuous portion includes a convex portion whose outer peripheral side in the radial direction protrudes forward in the rotational direction from the center side, foreign matter can be locked to the convex portion.

Furthermore, the stirring blade extends from the center of rotation toward the inner wall of the stirring tank, and is provided with a blade portion that is formed at least partially discontinuously in the circumferential direction. In the case where the angle formed by the rotation direction front end edge in the range from the predetermined position in the radial direction of the continuous portion to the outer peripheral side by a predetermined amount and the rotation direction of the stirring blade at the predetermined position intersects at 110 ° or less, foreign matter Can be easily locked to the foreign matter locking portion.

Paper processing method according to the present invention, together with the used paper is agitated in a stirred tank by the stirring blades with water, then lock the foreign matters mixed in the stirring vessel to the catching portion provided on the stirring blades, stirring tank The stirrer blade rotates in the opposite direction to that during the disaggregation process until the waste paper pulp liquid produced in step 1 is taken out of the agitation tank, so that the disaggregation process can be smoothly performed during the disaggregation process, and the reverse rotation The foreign matter can be locked to the foreign matter locking portion.

1 is a schematic configuration diagram of a recycling processing apparatus including a used paper processing apparatus according to an embodiment of the present invention. It is a perspective view of the used paper pulp manufacturing part of the said reproduction | regeneration processing apparatus. It is a front view of the said used paper pulp manufacturing part. It is a longitudinal cross-sectional view of the stirring tank of the said used paper pulp manufacturing part, and its periphery. It is the top view and front view of the stirring blade of the said used paper pulp manufacturing part. It is the elements on larger scale of the said stirring blade. It is a top view of the deinking part of the said reproduction | regeneration processing apparatus. It is the structure schematic of the paper making part of the said reproduction | regeneration processing apparatus. It is a use mode figure of the said stirring blade. It is a partial expanded sectional view of the stirring blade concerning other embodiment of this invention. It is a partial expanded sectional view of the stirring blade concerning reference example and other embodiment of this invention. It is a top view of the stirring blade concerning other embodiment of this invention. It is the elements on larger scale of the said stirring blade. It is a use mode figure of the said stirring blade. It is a top view of the stirring blade concerning other embodiment of this invention. It is the top view and front view of the stirring blade concerning further another embodiment of this invention. It is a top view of the stirring blade concerning other embodiment of this invention. It is a partial expanded sectional view of the said stirring blade. It is a top view of the stirring blade concerning other embodiment of this invention. It is a top view of the stirring blade concerning other embodiment of this invention. It is a top view of the stirring blade concerning other embodiment of this invention. It is a top view of the stirring blade concerning other embodiment of this invention. It is a partial expanded sectional view of the said stirring blade.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a recycling processing apparatus provided with a used paper processing apparatus according to the present invention. The recycle processing apparatus 1 disassembles the used paper 10 to produce a used paper pulp liquid, and produces the recycled paper 13 by making paper from the obtained used paper pulp liquid. In FIG. 1, the regeneration processing apparatus 1 includes a used paper pulp manufacturing unit 3, a deinking unit 5, a paper making unit 6, a finishing unit 7, and a control unit 8.

(Recycled Paper Pulp Production Department)
FIG. 2 is a perspective view of the used paper pulp manufacturing unit 3, FIG. 3 is a front view of the used paper pulp manufacturing unit 3, and FIG. 4 is a longitudinal sectional view showing the internal structure of the stirring tank 29 of the used paper pulp manufacturing unit 3. The used paper pulp manufacturing unit 3 includes a used paper supply unit 21 and a disaggregation processing unit 22. The used paper supply unit 21 includes a used paper storage unit 24 and a weighing unit 25. The used paper storage unit 24 is installed above the stirring tank 29 that constitutes the used paper pulp manufacturing unit 3. The used paper container 24 is formed in a box shape having an upper opening. As shown in FIG. 4, the used paper container 24 has a bottom plate 27 that can slide in the horizontal direction. The weighing unit 25 is configured by a weight measuring device such as a load cell. The measuring unit 25 measures the weight of the used paper stored in the used paper storage unit 24.

 The disaggregation processing unit 22 is constituted by a used paper processing apparatus F that stirs the used paper 10 together with water and performs the disaggregation processing. The disaggregation processing unit 22 includes a stirring tank 29, a water supply unit 28, and a stirring unit 31. The shape and size of the stirring tank 29 are not particularly limited, but it is preferable to use a bottomed and substantially cylindrical or polygonal cylindrical shape from the viewpoint of good stirring efficiency. In FIGS. 2-4, the case where the stirring tank 29 is formed in the regular octagonal cylinder shape as an example is shown. Further, the stirring tank 29 has an inner diameter of 30 mm to 2000 mm, more preferably about 300 mm to 1500 mm, and a capacity of about 0.4 L to 5000 L, more preferably about 7 L to 100 L, from the viewpoint of disaggregation efficiency and downsizing of the apparatus. Can be used.

As shown in FIGS. 2 to 4, a plurality of baffle plates 33 are provided on the inner wall surface of the stirring tank 29. The baffle plate 33 is not particularly limited in its shape, installation position, and number as long as the liquid stored in the agitation tank 29 is appropriately agitated and the rotation of the agitation blade 41 is suppressed while entraining the air. 2 to 4, as an example, a baffle plate 33 formed in a triangular prism shape is projected from a plurality of locations on the inner wall surface that is substantially the center in the height direction of the stirring tank 29.

At the bottom of the agitation tank 29, a used paper pulp liquid extraction unit 34 and a foreign matter extraction unit 37 are provided. The used paper pulp liquid take-out section 34 is connected to an opening 32 provided at the bottom of the stirring tank 39. The waste paper pulp liquid take-out section 34 takes out the waste paper pulp liquid containing waste paper pulp, water and the like produced by stirring the waste paper 10 together with water in the stirring tank 29 and disaggregating it from below the stirring tank 29. Is for.

One end of a pipe 35 is connected to the used paper pulp liquid extraction unit 34. The other end of the pipe 35 is connected to the pump 36. Although the kind of pump 36 is not specifically limited, It is preferable to use a tube pump. By using a tube pump, the waste paper pulp liquid can be transferred downstream at a predetermined timing without installing a valve. When using another pump instead of the tube pump, a valve is provided in the middle of the pipe 35.

The waste paper pulp liquid extraction unit 34 is provided with a foreign matter outflow suppression unit 38 that suppresses foreign matters mixed in the stirring tank 29 from being sent to the downstream side. The foreign matter outflow suppression unit 38 includes an erection member 39 spanned from one point on the periphery of the used paper pulp liquid extraction unit 34 opened in a circular shape to another point. The shape of the erection member 39 is not particularly limited, and can be formed into a rod shape, a columnar shape, a prismatic shape, a spherical shape, a lump shape, or the like. Among these, it is preferable that the waste paper pulp liquid is formed into a rod shape, a columnar shape, or a prismatic shape in that it can easily pass through the waste paper pulp liquid extraction portion 34 where the foreign substance outflow suppression portion 38 is installed and can be transferred to the downstream side.

In addition, it is preferable that the shaft diameter of the erection member 39 is smaller than a predetermined value. There may be one erection member 39 or a plurality of erection members 39. When a plurality of the erection members 39 are installed, these may be installed in a cross shape, may be installed at a predetermined angle, or may be parallel. Among these, in particular, the erection member 39 is disposed in the diameter direction of the opening 32 of the used paper pulp liquid extraction portion 34, so that foreign matters can be efficiently locked and the outflow to the downstream side can be suppressed. Is preferable.

The foreign substance extraction part 37 takes out such a foreign material, when the foreign material which is hard to disaggregate has mixed in the liquid mixture stored in the stirring tank 29. FIG. The foreign matter extraction unit 37 is connected to an opening 30 provided at a position different from the location where the used paper pulp liquid extraction unit 34 is installed at the bottom of the stirring tank 29. A lid 40 is provided in the opening 30 of the foreign matter extraction portion 37. The lid 40 closes the foreign matter takeout part 37 during the disaggregation process of the used paper 10, and opens the opening 30 after the used paper pulp liquid produced by the disaggregation process is taken out from the used paper pulp liquid takeout part 34. Then, the mixed liquid of the foreign matter and water can be flowed into the foreign matter extraction portion 37. The foreign matter extraction unit 37 is connected to the foreign matter collection unit 44. The foreign matter collection unit 44 includes a filtration unit 49. The filtration part 49 filters the liquid mixture of the foreign substance and water taken out from the stirring tank 29 by the foreign substance extraction part 37, and collects the foreign substance.

The water supply unit 28 is provided on the upper side wall of the stirring tank 29. The water supply unit 28 is connected to both a supply unit (not shown) of tap water or the like and a white water tank (not shown) of the papermaking unit 6 described later by piping (not shown). One of the white water in the white water tank is supplied into the stirring tank 29.

Further, a deinking agent supply unit 26 that supplies deinking agent necessary for the deinking process in the subsequent deinking unit 5 is installed next to the water supply unit 28 on the upper side wall of the stirring tank 29. .

The stirring means 31 includes a stirring shaft 42, a drive unit 43, and a stirring blade 41. The stirring shaft 42 is installed at a substantially central position in a plan view of the stirring tank 29. A pulley 46 for transmitting power is installed on the upper portion of the stirring shaft 42, and is connected to the drive unit 43 by a belt 47 and a pulley 48.

The drive unit 43 includes a motor. The drive unit 43 rotationally drives the stirring shaft 42 via a power transmission mechanism 45 including a belt 47 and pulleys 46 and 48, and thereby rotationally drives the stirring blade 41 in both forward and reverse directions.

The stirring blade 41 is installed in the lower part of the stirring tank 29. The stirring blade 41 stirs and separates the waste paper 10 together with the water supplied from the water supply unit 28. The stirring blade 41 is fixed to the lower part of the stirring shaft 42.

The installation height of the stirring blade 41 in the stirring tank 29 depends on the size of the stirring tank 29, but is preferably provided at a position of about 10 mm to 100 mm from the bottom surface of the stirring tank 29. By making the position of the stirring blade 41 higher than 10 mm from the bottom surface of the stirring tank 29, the used paper 10 can be easily submerged under the stirring blade 41 during the disaggregation process, and the used paper 10 is cut by the stirring blade 41. As a result, waste paper pulp can be easily produced. Further, by lowering the position of the stirring blade 41 below 100 mm from the bottom surface of the stirring tank 29, when the small amount of used paper 10 is disaggregated, the stirring blade 41 is placed in a mixed liquid containing water from the used paper 10 and the water supply unit 28. It is possible to prevent the rotation of the stirring blade 41 while entraining the air by setting the height so that it can be immersed.

The thickness T (see FIG. 5) of the stirring blade 41 is preferably about 0.3 mm to 10 mm, and more preferably about 0.5 mm to 7 mm. When the thickness of the stirring blade 41 is 0.3 mm or more, the used paper 10 stored in the stirring tank 29 and the liquid such as water can be sufficiently stirred, and the used paper 10 is stirred because it is 10 mm or less. The waste paper pulp liquid can be manufactured by cutting efficiently with the blades 41.

FIG. 5A shows a plan view of the stirring blade 41 and FIG. 5B shows a front view of the stirring blade 41. The stirring blade 41 includes a blade portion 15 formed into a disk shape by a thin plate. The blade portion 15 extends from the rotation center C toward the inner wall of the stirring tank 29 and is at least partially discontinuous in the circumferential direction E. A flat portion 16 is provided in a predetermined range at least near the rotation center C of the blade portion 15. The flat portion 16 is desirably provided at least in a range where the distance from the mounting position of the rotating shaft 42 is about 1/8 to 7/8 of the radius from the rotation center C to the outer peripheral edge of the stirring blade 41. In the stirring blade 41 shown in FIG. 5, the flat portion 16 is provided in the entire range of the blade portion 15 except the range in which the foreign matter locking portion 17 described later is provided.

The stirring blade 41 is provided with a foreign matter locking portion 17 for locking foreign matter mixed in the stirring tank 29. The foreign matter locking portion 17 is provided at the radially outer peripheral position of the blade portion 15. FIG. 5 shows a case where the foreign matter locking portions 17 are provided at four locations at intervals of 90 ° on the radially outer peripheral side of the blade portion 15. The foreign matter locking portion 17 has a distance from the mounting position of the rotary shaft 42 from a position of about 1/8 to 7/8 of the radius from the rotation center C to the outer peripheral edge of the stirring blade 41 to the outer peripheral edge. It is provided in the range.

The foreign matter locking portion 17 includes a cutout portion 18 obtained by cutting out the flat portion 16 and a protruding portion 19 that protrudes upward from the flat portion 16. The notch 18 is provided adjacent to the protrusion 19. Each notch 18 is formed by notching a predetermined position of the blade 15 in a reverse L-shape in plan view.

The notch 18 includes a first notch 75 and a second edge 76 that constitute each side of the inverted L shape. FIG. 6 shows an enlarged view of the foreign matter locking portion 171 at the 6 o'clock position shown at the bottom of the blade portion 15 in FIG. The first cut edge 75 is formed as a straight line parallel to the fold line 72 along the radial direction. The first cut edge 75 is formed by cutting out the blade portion 15 along a straight line connecting the predetermined position P in the radial direction of the blade portion 15 and the predetermined position U in the vicinity of the outer peripheral edge. A radius R that passes through a predetermined position P in the radial direction of the blade portion 15 and a straight line that forms the first missing edge 75 intersect each other at a predetermined angle θ2.

The projecting portion 19 is formed by bending a substantially rectangular folded piece 71 in plan view, which is partitioned by the inverted L-shaped cutout portion 18, upward at a folding line 72 along the radial direction by a predetermined angle. A foreign matter locking opening 78 is formed below the folded piece 71. The foreign matter locking opening 78 is a space that is surrounded by the fold line 72 and the notch 18 and has a defined periphery. The outer peripheral edge of the stirring blade 41 of the foreign matter locking opening 78 is open.

The protruding portion 19 has an upward slope toward the front in the rotational direction shown in FIGS. 5A and 6B in the reverse direction D2 of FIG. 5A in the reverse direction D2 when the breaker piece 71 is bent upward. A formed oblique portion 74 is provided. The inclination angle θ1 of the inclined portion 74 with respect to the plane portion 16 that is a horizontal plane is preferably about 3 ° to 85 °, and more preferably about 20 ° to 60 °. By setting the angle of protrusion of the inclined portion 74 from the flat portion 16 to 3 ° or more, when the stirring blade 41 rotates in the direction D2 opposite to that during the disaggregation process shown clockwise in FIG. The mixed liquid containing waste paper, water, waste paper pulp, and the like that circulates above is easily flowed from the notch portion 18 to the lower portion of the flat portion 16 through the foreign matter locking opening 78. Therefore, the foreign matter in the mixed solution is easily locked to the protruding portion 19. In addition, by setting the inclination angle θ1 of the inclined portion 74 from the flat portion 16 to 85 ° or less, it is possible to suppress the agitation resistance when the mixed liquid stored in the agitation tank 29 is agitated. Can reduce the load.

The length L1 in the radial direction of the protrusion 19 is set to about 1/8 to 7/8 of the radius from the rotation center C to the outer peripheral edge of the stirring blade 41.

The foreign matter locking portion 17 rotates in a direction D2 opposite to that during the disaggregation process in a range from a predetermined radial direction position S of the projecting portion 19 which is a discontinuous portion of the blade portion 15 to an outer peripheral edge on the outer peripheral side by a predetermined amount. The angle θ3 formed by the direction front end edge and the rotation direction D3 of the stirring blade 41 at the predetermined position S is formed to intersect at 110 ° or less. That is, the leading edge 192 of the protruding portion 19 contacts the used paper pulp liquid as the leading edge in the rotational direction when the stirring blade 41 is rotated clockwise in FIG. 6 which is the direction D2 opposite to that during the disaggregation process. To do. On the other hand, the first cut edge 75 is the rear end edge in the rotation direction of the reverse direction D2. FIG. 6 shows a case where the angle θ3 formed by the leading edge 192 and the rotation direction D3 at the predetermined position S is about 107 °.

The second notch edge 76 is connected to the first notch edge 75 at a predetermined position P, and both are substantially orthogonal. The second notch edge 76 is formed such that the distance from the mounting position of the rotary shaft 42 is in the range of about 1/8 to 7/8 of the radius from the rotation center C of the blade portion 15 to the outer peripheral edge of the stirring blade 41. Is done. The 2nd notch edge 76 is formed in linear form substantially along the circumferential direction.

(Deinking part)
FIG. 7 is a plan view of the deinking unit 5. The deinking unit 5 is constituted by a deinking device B that deinks the used paper pulp liquid manufactured by the used paper pulp manufacturing unit 3. The deinking unit 5 includes a deinking tank 51, a blade 53, and a foam receiving tank 55. In the deinking tank 51, a plurality of partition walls 52 are arranged in parallel, and a flow path for waste paper pulp liquid is formed by meandering. An air supply unit 58 that supplies air into the deinking tank 51 is provided on the bottom surface of the deinking tank 51. In addition, in the upper left corner and the upper right corner of the bottom surface of the deinking tank 51 in FIG. 7, an inflow part 56 that allows the used paper pulp liquid to flow into the deinking tank 51 and an outflow part 57 that causes the used paper pulp liquid after the deinking process to flow out. And are provided respectively.

The blade 53 is installed above the deinking tank 51 and is movable in the vertical direction in FIG. The blade 53 causes the bubbles floating above the deinking tank 51 to overflow from the peripheral wall of the deinking tank 51 and sweep it out. The foam receiving tank 55 is provided so as to surround the outer periphery of the deinking tank 51. The foam receiving tank 55 receives the foam swept out by the blade 53.

(Paper making)
FIG. 8 is a schematic diagram of the construction of the paper making unit 6. The paper making unit 6 includes a head box 61, a wire unit 62, a dehydrating unit 63, and a drying unit 64. The head box 61 includes a box-shaped storage portion 611, a waste paper pulp liquid inflow portion 614 having a pipe 613 connected to the lower portion of the storage portion 611, and a waste paper pulp liquid overflowing from the storage portion 611, and a wire portion 62. And an outflow portion 615 for flowing out.

The wire part 62 includes a papermaking net 621. The papermaking net 621 is configured by an endless mesh belt and is stretched around a plurality of rollers 622. In FIG. 8, the right roller 622 a is connected to the wire driving unit 623, and the net 621 travels around by the driving of the wire driving unit 623.

Waste paper pulp liquid is allowed to flow out from the outflow portion 615 of the head box 61 on the upper surface of the paper net 621, and drained by the paper net 621 to form the wet paper 12 forming a fiber layer. A water receiving portion 624 that receives water flowing down from the mesh of the papermaking net 621 traveling on the upper side is provided inside the papermaking net 621. The water receiving unit 624 is connected to a white water tank (not shown) and guides the received water to the white water tank.

The dewatering unit 63 has a water absorption belt 631. The water absorption belt 631 is made of felt or the like, and is stretched around a plurality of rollers 632 and a press roller 634b. The water absorbing belt 631 conveys the wet paper 12 transferred from the papermaking net 621 and dehydrates the wet paper 12.

The drying unit 64 includes a drying belt 641, a canvas 642, and a drying roller 643. The drying belt 641 conveys the wet paper 12 transferred from the water absorption belt 631. The drying belt 641 is stretched around a roller 645, a press roller 634a, and a drying roller 643.

  A dehydrating unit 633 is provided at a contact portion between the water absorbing belt 631 and the drying belt 641. The dehydrating means 633 includes a pair of press rollers 634a and 634b, and the pair of press rollers 634a and 634b presses and dehydrates the wet paper 12 sandwiched between the water absorbing belt 631 and the drying belt 641. The wet paper 12 that has passed through the dehydrating unit 633 is transferred from the water absorbing belt 631 to the drying belt 641.

In FIG. 8, the upper press roller 634a is connected to the press drive unit 637 and rotates by the drive of the press drive unit 637, and the lower press roller 634b rotates following the rotation of the upper press roller 634a. Then, the water absorption belt 631 and the drying belt 641 are caused to travel as the press rollers 634a and 634b rotate.

The canvas 642 is made of resin having a net shape, and is stretched over a plurality of rollers 646. The canvas 642 sandwiches and transports the wet paper 12 with the drying belt 641 and presses the wet paper 12 against the drying roller 643 via the drying belt 641 to dry it. In FIG. 8, the upper roller 646 a on the right side is connected to the canvas drive unit 647, and the canvas 642 runs around by the drive of the canvas drive unit 647.

The drying roller 643 is rotatably supported by a plurality of support shafts 650. A heating unit 648 is provided inside the drying roller 643. An electric heater or the like can be used as the heating means 648. The drying roller 643 is provided with a contact-type temperature sensor 649, and the surface temperature of the drying roller 643 is detected by the temperature sensor 649.

(Finishing part)
The finishing section 7 shown in FIG. 1 has a calendar section and a cutting section (not shown), the calendar section is provided with a plurality of press rollers (not shown) for increasing the flatness of the paper, and the cutting section has a predetermined paper. A cutting blade (not shown) for cutting the sheet size is provided.

(Control unit 8)
The control unit 8 includes a CPU, a memory, and the like, and controls operations of the used paper pulp manufacturing unit 3, the deinking unit 5, the paper making unit 6, and the finishing unit 7.

The operation of the reproduction processing apparatus 1 according to the present embodiment will be described below. When the used paper 10 as the raw material is stored in the used paper storage unit 24 shown in FIG. 4, the control unit 8 measures the weight of the used paper 10 by the measuring unit 25. Then, the control unit 8 slides the bottom plate 27 and opens the bottom portion of the used paper storage unit 24. As a result, the used paper 10 in the used paper container 24 falls into the stirring tank 29 below.

Based on the measurement value of the metering unit 25, the control unit 8 supplies an amount of water necessary for the disaggregation process from the water supply unit 28 to the stirring tank 29. Then, when the control unit 8 drives the driving unit 43, the stirring shaft 42 is rotated via the power transmission mechanism 45. With the rotation of the stirring shaft 42, the stirring blade 41 is rotated over a predetermined time in the positive direction D1 shown in the counterclockwise direction in FIGS. Thus, the used paper 10 stored in the stirring tank 29 is stirred together with water, and the disaggregation process is performed.

In the case of the disaggregation treatment, if foreign matter that is difficult to disaggregate is mixed in the mixed liquid containing waste paper, water, and waste paper pulp produced by the disaggregation treatment stored in the stirring tank 29, the foreign matter is easily disaggregated. It floats without being stirred and is stirred together with the liquid mixture in the stirring tank 29. Examples of foreign materials that are difficult to disaggregate include tape made of synthetic resin such as cellophane or vinyl, which has been pasted on waste paper 10, sticky notes or craft tape with adhesive applied, waterproofing agent, water-resistant agent, water-repellent agent, oil-proofing agent and gloss Paper, photographic paper, photographs, photographic paper for inkjet printers that have been surface-treated by applying a coating agent such as an imparting agent or an emulsion protective layer or sticking a film or aluminum foil, low solubility in water Examples thereof include paper manufactured from raw materials, thermal paper, carbon paper, and a crimped postcard.

FIG. 9 is a partially enlarged cross-sectional view showing an aspect of the periphery of the foreign matter locking portion 171 of the stirring blade 41 during the disaggregation process and when the manufactured waste paper pulp liquid is taken out thereafter. FIG. 9 shows a case where the stirring blade 41 rotates in the forward direction D1 and the reverse direction D2 during the disaggregation process and when the used paper pulp liquid is taken out.

As shown in FIG. 9A, during the disaggregation process, the liquid mixture around the foreign matter locking portion 171 in the stirring tank 29 is relatively moved with respect to the stirring blade 41 by the rotation of the stirring blade 41 in the positive direction D1. It moves from the right side to the left side in FIG. In the position where the protrusion 19 is formed, the mixed liquid is guided obliquely upward along the slope of the inclined portion 74 from the flat portion 16. Then, a part of the liquid mixture moves upward from the upper surface of the inclined portion 74 as indicated by an arrow Y2. As a result, a part of the mixed liquid positioned above the stirring blade 41 flows upward from the inclined portion 74 toward the upper portion of the stirring tank 29, and the vertical stirring in the stirring tank 29 is promoted. Therefore, it can stir efficiently. Thus, since the mixed liquid is efficiently stirred in the stirring tank 29 guided by the inclined portion 74, the stirring load of the drive unit 43 can be reduced.

On the other hand, the other part of the liquid mixture on the flat portion 16 is stirred from the upper surface of the inclined portion 74 over the rear end portion in the forward direction D1 rotation of the projecting portion 19, that is, over the front end portion 191 in the reverse direction D2. With respect to the rotation of the wing 41 in the positive direction D1, it is moved relatively to the left in the figure as indicated by an arrow Y3 that is rearward.

The control unit 8 drives the driving unit 43 for a predetermined time and rotates the stirring blade 41 in the forward direction D1 for a predetermined time, whereby the disaggregation process of the used paper 10 proceeds and the used paper pulp liquid is produced. After completion of the disaggregation process, an amount of deinking agent corresponding to the weight of the used paper 10 is supplied from the deinking agent supply unit 26 shown in FIG. 4 into the agitation tank 29 and mixed with the manufactured used paper pulp liquid. Then, the control unit 8 drives the pump 36. At this time, the control part 8 continues the drive of the drive part 43, and makes the stirring blade 41 remain rotating in the forward direction D1. When the pump 36 is driven, the used paper pulp liquid stored in the agitation tank 29 flows into the pipe 35 from the used paper pulp liquid take-out section 34 and is transferred to the deinking section 5 on the downstream side via the pump 36.

The foreign matter mixed in the mixed liquid in the stirring tank 29 is separated from the fiber component constituting the waste paper 10 by stirring by the stirring blade 41 or the fiber component is removed, and the waste paper pulp liquid after the disaggregation treatment is separated. It is mixed in. The control unit 8 controls the drive unit 43 at a predetermined timing while driving the pump 36 to take out the used paper pulp liquid from the used paper pulp liquid taking-out unit 34, and the agitating blade 41 is opposite to that during the disaggregation process. 5 and 6 in the direction D2, it rotates clockwise. Accordingly, the foreign matter mixed in the waste paper pulp liquid is locked by the foreign matter locking portion 17.

FIG. 9B shows an enlarged view of the state around the foreign matter locking portion 171 when the control unit 8 rotates the stirring blade 41 in the direction D2 opposite to that during the disaggregation process when taking out the used paper pulp liquid. . As shown in the figure, the waste paper pulp liquid in the stirring tank 29 moves to the right as indicated by the arrow Y4 relative to the stirring blade 41 that moves to the left in the figure. And the waste paper pulp liquid which flows over the plane part 16 on the left side from the protrusion part 19 in the same figure is divided into a flow path up and down by the front-end part 191 in the rotation of the protrusion part 19 in the reverse direction D2.

A portion of the used paper pulp liquid passes over the front end 191 of the projecting portion 19 as indicated by an arrow Y5, flows obliquely downward along the upper surface of the inclined portion 74, and is further rearward in the rotation in the reverse direction D2. And flow to the right. Another part of the used paper pulp liquid is guided from the front end portion 191 of the protruding portion 19 to the lower surface of the inclined portion 74 as shown by an arrow Y6, and flows into the foreign matter locking opening 78.

As described above, the waste paper pulp liquid is distributed by being separated from the protruding portion 19 by the control unit 8 rotating the stirring blade 41 in the direction D2 opposite to that during the disaggregation process. Then, the foreign matter mixed in the waste paper pulp liquid is also divided and distributed in the upper and lower flow paths, and as a result, the plurality of ends of the foreign matter J having a predetermined shape such as a long shape or a rectangular shape are in different flow paths. When divided and distributed, as shown in FIG. Once the foreign matter J is locked to the foreign matter locking portion 17, while the stirring blade 41 is rotating in the reverse direction D2, the flow of the waste paper pulp liquid flowing above and below the protruding portion 19 causes the foreign matter J to flow. As the end portions are pulled backward, the foreign matter J is kept locked.

Since the protrusion 19 includes a slant portion 74 formed in an upward gradient toward the front with respect to the rotation in the reverse direction D2 that is the rotation direction of the stirring blade 41 when the used paper pulp liquid is taken out, At the time of take-out, the foreign matter can be locked to the foreign matter locking portion 17 by rotating the stirring blade 41 in the direction D2 opposite to that during the disaggregation process. On the other hand, at the time of disaggregation processing, the stirring blade 41 rotates in the forward direction D1 opposite to that at the time of taking out the used paper pulp liquid. In this state, the inclined portion 74 is formed in an upward gradient toward the rear instead of the front with respect to the rotation of the stirring blade 41 in the positive direction D1. Therefore, the mixed liquid in the stirring tank 29 at the time of the disaggregation process is efficiently and smoothly stirred along the slanted portion 74, so that the load on the driving unit 43 can be reduced.

Further, since the foreign matter locking portion 17 includes the cutout portion 18 obtained by cutting out the flat portion 16, even when the rotation speed of the stirring blade 17 is increased, it is possible to make it difficult for air to enter below the stirring blade 17. Noise generation can be suppressed. Further, even when the amount of waste paper 10 to be disaggregated is small and the liquid level of the waste paper 10 stored in the agitation tank 29, water and waste paper pulp, etc. is low, the liquid mixture can be properly stirred and disaggregated. can do. Furthermore, when the agitation blade 41 is rotated in the reverse direction R2 when the used paper pulp liquid is taken out, the used paper pulp liquid can be circulated from the notch portion 18 to the lower portion of the flat surface portion 16 through the foreign matter locking opening 78. Therefore, the foreign matter J can be efficiently locked to the foreign matter locking portion 17.

Since the notch 18 is provided adjacent to the protrusion 19, a portion of the waste paper pulp liquid whose flow path is divided by the protrusion 19 can be caused to flow into the notch 18, and the foreign matter J can be efficiently used. It can be well locked to the foreign matter locking portion 17. In addition, since the waste paper pulp liquid is circulated through the flow path from the projecting portion 19 to the cutout portion 18, a smooth flow of the mixed liquid can be formed, so that the load on the driving portion 43 can be reduced.

Further, the foreign matter locking portion 17 is in a direction D2 opposite to that during the disaggregation process in a range from a predetermined radial direction position S of the protruding portion 19 which is a discontinuous portion of the blade portion 15 to the outer peripheral edge on the outer peripheral side by a predetermined amount. By forming the tip edge 192, which is the front edge in the rotation direction, and the rotation direction D3 of the stirring blade 41 at the predetermined position S so as to intersect at 110 ° or less, the tip edge 192 of the protrusion 17 has a foreign object. J can be easily locked.

The control unit 8 controls the drive unit 43 to rotate the stirring blade 41 in the direction D2 opposite to that during the disaggregation process. The liquid level of the waste paper pulp liquid stored in the agitation tank 29 is the liquid level during the disaggregation process. It is preferable that the position is about one-half to one-third lower than the position. Thus, the waste paper pulp liquid that collides with the front end 191 of the protrusion 19 with respect to the rotation in the reverse direction D2 of the stirring blade 41 is less likely to move upward above the protrusion 19 to form an ascending flow path. As shown by arrows Y5 and Y6 in 9 (b), most of the waste paper pulp liquor is likely to be moved rearward relative to the stirring blade 41 along the upper and lower surfaces of the inclined portion 74. Therefore, the foreign matter J can be more reliably locked.

The foreign matter that is not locked to the foreign matter locking part 17 and reaches the used paper pulp liquid take-out part 34 while being mixed in the used paper pulp liquid is a construction member that constitutes the foreign matter outflow suppression part 38 provided in the used paper pulp liquid take-out part 34 39 is locked. As a result, it is possible to suppress the inflow of the foreign matter that flows out to the downstream side into the pipe 35. That is, the foreign matter is locked to the erection member 39 when the fibers in the waste paper pulp liquid pass between the erection members 39 together with water. Therefore, the malfunction which clogs the piping 35 and the pump 36 can be suppressed.

When the control unit 8 controls the pump 36 and the stirring blade 41 starts to rotate in the reverse direction D2, when a predetermined time has elapsed, most of the used paper pulp liquid in the stirring tank 29 is taken out from the used paper pulp liquid extracting unit 34. . However, in the lower part of the agitation tank 29, the fiber that could not be properly transferred from the agitation tank 29 to the pipe 35 through the waste paper pulp liquid take-out part 34 only by driving the pump 36 once contained a lot of water. Remains.

Therefore, the control unit 8 supplies a predetermined amount of water from the water supply unit 28 into the stirring tank 29. As a result, the fibers remaining in the agitation tank 29 are hydrated, the waste paper pulp liquid is diluted, the fiber concentration is lowered, and the viscosity is lowered. The waste paper pulp liquid can be properly stirred by the stirring blade 41 and can be further transferred to the downstream side by driving the pump 36.

The rotation of the stirring blade 41 when supplying a predetermined amount of water from such a water supply unit 28 and diluting the waste paper pulp liquid may be changed from the reverse direction D2 to the forward direction D1, or the reverse direction D2 remains unchanged. It is good. However, for example, at least after the predetermined timing at which the liquid level of the used paper pulp liquid after dilution gradually decreases and becomes slightly higher than the position where the stirring blade 41 is installed, the reverse direction D2 opposite to that during the disaggregation process is set. Is preferred. Accordingly, even if the foreign matter J is detached from the foreign matter locking portion 17 due to the rotation in the forward direction D1, the foreign matter J can be locked again to the foreign matter locking portion 17 by the subsequent rotation in the reverse direction D2.

The control unit 8 continues the rotation of the agitating blade 41 for a predetermined time and continues to drive the pump 36 so that the used waste paper pulp liquid stored in the lower part of the stirring tank 29 is piped from the used paper pulp liquid takeout part 34. Take out to 35. The control unit 8 repeats the water supply operation from the water supply unit 28 to the agitation tank 29 several times by a predetermined amount every predetermined time. Accordingly, the control unit 8 controls to reduce the amount of fibers remaining in the stirring tank 29. By rotating the stirring blade 41 in the reverse direction R2 at a predetermined timing after water supply from the water supply unit 28, after the diluted waste paper pulp liquid is taken out from the stirring tank 29, the foreign matter J enters the foreign matter locking portion 17. It can be in the locked state.

After the control unit 8 determines that substantially all the fibers have been taken out from the agitation tank 29 and finishes repeating the water supply operation from the water supply unit 28, the control unit 8 stops the pump 36. And the operation | movement which removes the foreign material latched by the foreign material latching | locking part 17 is started. In order to remove foreign matter from the foreign matter locking portion 17, the control portion 8 supplies a predetermined amount of water from the water supply portion 28 to the extent that the stirring blade 41 is immersed into the stirring tank 39, and controls the drive portion 43 to perform stirring. The wing 41 is rotated in the positive direction D1. As a result, the foreign matter is detached from the foreign matter locking portion 17. Further, the foreign matter locked to the foreign matter outflow suppression portion 38 is also removed from the erection member 39 because there is no negative pressure by the pump 36, and floats in the water supplied from the water supply portion 28.

Next, the control unit 8 slides the lid 40 that has closed the foreign matter extraction unit 37 to open the foreign matter extraction unit 37. Thus, the liquid in the agitation tank 29, foreign matters floating in the water, and in some cases, mixed liquids such as remaining fibers flow into the opening 30 and are taken out from the foreign matter extraction portion 37. The extracted liquid mixture reaches the foreign matter collecting unit 44, and the liquid is filtered by the filtering unit 49, and the foreign matter J is collected. Thereafter, the foreign matter collected as filter cake on the filtration unit 49 is manually removed by the operator.

In the deinking section 5 shown in FIG. 7, the waste paper pulp liquid flows into the deinking tank 51 from the inflow section 56. Then, air is supplied from the air supply unit 58 into the waste paper pulp liquid stored in the deinking tank 51, and the deinking process is performed. The waste paper pulp liquid after deinking obtained by the deinking process flows out from the outflow part 57 and is sent to the papermaking part 6 on the downstream side.

In the paper making section 6 shown in FIG. 8, the waste paper pulp liquid after deinking flows into the head box 61 and is supplied from the outflow section 615 to the top surface of the paper making net 621, forming the wet paper 12 that is a uniform fiber layer. The The water flowing down from the screen net 621 is received by the water receiving unit 624 and stored in the white water tank.

If necessary, the white water in the white water tank is subjected to removal of fine fibers by a filter, separation of ink, toner, etc., addition of chemicals, neutralization treatment, etc., as shown in FIG. 3 and is reused by supplying water from the water supply unit 28 to the stirring tank 29.

The wet paper 12 formed on the papermaking net 621 shown in FIG. 8 is transferred to the water absorbent belt 631 at the contact portion between the papermaking net 621 and the water absorbent belt 631, and the water contained in the wet paper 12 by the water absorbent belt 631. Is absorbed and dehydrated. When the wet paper 12 reaches the installation position of the dewatering means 633, the wet paper 12 is pressed from both sides by the pair of press rollers 634a and 634b and dehydrated with the wet paper 12 being sandwiched between the water absorbing belt 631 and the drying belt 641. In addition, the water absorption belt 631 is transferred to the drying belt 641.

The wet paper 12 transferred to the drying belt 641 is sandwiched between the canvas 642 and, in this state, is pressed against the drying roller 643 via the drying belt 641 and dried. The surface temperature of the drying roller 643 is detected by the temperature sensor 649, and is maintained at a predetermined temperature set in advance based on the detection result.

The recycled paper 13 before finishing exiting the drying unit 64 is passed between a plurality of press rollers (not shown), thereby improving the flatness of the recycled paper 13 before finishing, and further, with a cutting blade, a predetermined sheet size. The recycled paper 13 is completed.

(Second Embodiment)
FIG. 10A shows a partially enlarged cross-sectional view of the foreign matter locking portion 171a of the stirring blade 41a according to the second embodiment. As shown in the figure, the stirring blade 41a according to the second embodiment is formed with a protruding portion 19a curved. As a result, the inclined portion 74a provided in the protruding portion 19a is not a flat surface but a curved surface like the inclined portion 74 according to the first embodiment. And the slant part 74a formed in this curved surface is formed in the up-slope toward the rotation direction front of the stirring blade 41a which becomes the direction D2 opposite to the time of disaggregation processing at the time of taking out used paper pulp liquid.

Like the protrusion 19 of the first embodiment, the curved protrusion 19a is formed at a predetermined angle upward at a fold line 72a along the radial direction in the notch 18a formed in the blade 15a. It is formed by bending. Further, the folded piece 71a is processed into a curved surface. Although not shown in the drawings, the shape of the fold 71a may be a substantially rectangular shape in plan view as in the first embodiment shown in FIG. 5 (a), and instead of this, a triangle, other polygons, a circle, It may be oval or irregular.

Since the protruding portion 19a is formed in a curved shape, there is an advantage that once the foreign matter is locked to the foreign matter locking portion 171a, it is difficult to come off.

(Third embodiment)
FIG. 10B is a partially enlarged cross-sectional view of the stirring blade 41b according to the third embodiment. In 3rd Embodiment, the protrusion part 19b is formed of a member different from the blade | wing part 15b. And the lower end part of the protrusion part 19b is being fixed to the upper surface of the blade | wing part 15b with the screw 65. FIG. Although not shown, a plurality of screws 65 are installed in the radial direction of the blade portion 15b.

And the notch part 18b is provided adjacent to the position where the protrusion part 19b of the blade | wing part 15b was fixed with the screw 65. FIG. The cutout portion 18b according to the third embodiment can be formed, for example, by punching the blade portion 15b vertically into a predetermined shape. The notch 18b is provided at a position on the lower end side of the projecting portion 19b that is recessed by a predetermined amount Lb from the tip 191b of the projecting portion 19b in the rotation direction D2 opposite to that during the disaggregation process of the stirring blade 41b. Yes. As a result, the foreign matter locking opening 78b is formed smaller than the foreign matter locking openings 78 and 78a according to the first embodiment shown in FIG. 9 and the second embodiment shown in FIG. .

In the third embodiment, since the projecting portion 19b is formed of a member different from the blade portion 15b, the thickness of the portion fixed to the blade portion 15b at the lower end portion of the projecting portion 19b is the first and second parts. It becomes thick compared with the case where the fold pieces 71 and 71a are bent like embodiment. Therefore, the durability of the stirring blade 41b is improved. Further, when the notch portion 18b is formed by punching the blade portion 15b up and down in a predetermined shape, the size and shape of the foreign matter locking opening 78b are the same as the size and shape of the protruding portion 19b. It can be set freely regardless of the setting. Therefore, the cutout portion 18b can be set to a size and shape with the best stirring efficiency, foreign object locking efficiency, and the like.

( Reference example )
FIG. 11A shows a partially enlarged sectional view of the stirring blade 41c of the reference example . As shown in the figure, the protruding portion 19c of the reference example protrudes downward from the plane portion 16c. The oblique portion 74c of the protruding portion 19c is formed in a downward gradient toward the front in the rotation direction D2 opposite to that during the disaggregation process. As described above, the stirring blade 41c from which the protruding portion 19c protrudes downward can be installed in the lower portion of the stirring tank 29, as in the first embodiment shown in FIG. It may be installed in the middle or upper position instead of the lower part. In addition, the stirring blade 41c shown in FIG. 11A has a larger inclination angle θc of the inclined portion 74c with respect to the flat portion 16c than the stirring blades 41 to 41b according to the first to third embodiments. Yes.

When the protrusion 19c locks the foreign matter J, as shown by the arrow Y7 in FIG. 11 (a), the waste paper pulp liquid circulates below the flat portion 16c is partially indicated by the arrow Y8. As shown, it flows through the foreign matter locking opening 78c and above the flat portion 16c. Further, as shown by the arrow Y9, another part of the used paper pulp liquid flows along the lower surface of the oblique portion 74c from below the tip portion 191c of the protruding portion 19c. As described above, the flow path of the used paper pulp liquid is divided by the foreign matter locking portion 17c, whereby the foreign matter is locked to the foreign matter locking portion 17c.

Since the protruding portion 19c protrudes downward in the stirring blade 41c of the reference example, it is possible to appropriately stir fibers that tend to remain on the upper surface of the bottom portion of the stirring tank 29 below the stirring blade 41c. In addition, the fibers can hardly remain on the upper surface of the inclined portion 74c.

( Fourth embodiment)
FIG. 11B is a partially enlarged cross-sectional view of the stirring blade 41d according to the fourth embodiment. As shown in the figure, the protruding portion 19d of the stirring blade 41d according to the fourth embodiment protrudes both above and below the plane portion 16d. Thus, even if it is a case where the stirring blade 41d rotates in the same direction D1 as the time of disaggregation processing and the opposite direction D2 by protruding part 19d protruding up and down, a foreign material latching | locking part A foreign object can be locked to 17d. Moreover, since the protrusion part 19d protrudes in both upper and lower sides from the plane part 16d, when stirring the liquid in the stirring tank 29, there exists an advantage that a big stirring force can be obtained.

The angles θd1 and θd2 at which the inclined portions 74d1 and 74d2 of the projecting portion 19d projecting upward and downward respectively incline with respect to the flat surface portion 16d may be different between the upward projection and the downward projection. There may be. In the foreign matter locking portion 17d shown in FIG. 11 (b), a case is shown in which both inclined portions 74d1, 74d2 are inclined at the same inclination angle from the flat portion 16d. In this case, the pair of opposed oblique portions 74d1 and 74d2 are parallel to each other. Then, since the used paper pulp liquid is easily circulated between the two protruding portions 19d, the stirring load of the driving portion 43 can be reduced. When removing the foreign matter from the foreign matter locking portion 17d, the rotational direction, rotational speed, and amount of rotation of the stirring blade 41d are adjusted, for example, the speed is relatively fast and the angle is reduced to reverse the forward and reverse directions R1, R2. There is a method in which the minute rotation such as repetition is continuously performed until the foreign object is removed.

( Fifth embodiment)
FIG. 12 is a plan view of a stirring blade 41e according to the fifth embodiment. FIG. 13 is an enlarged view of the periphery of the foreign matter locking portion 171e shown at the bottom in FIG. The stirring blade 41e according to the fifth embodiment shown in FIGS. 12 and 13 is not formed in parallel along a radius in which the foreign matter locking portion 17e extends radially from the rotation center Ce toward the outer peripheral edge, and is predetermined in the radial direction. It is formed with an angle inclination.

The first missing edge 75e of the foreign matter locking part 17e is formed in a substantially straight line shape in plan view from a predetermined position Pe in the radial direction of the blade part 15e to a predetermined position Ue near the outer periphery. The straight line that forms the first missing edge 75e and the radius Re1 that passes through the predetermined radial position Pe of the blade 15e intersect at a predetermined angle θe1.

The second notch edge 76e is formed substantially orthogonal to the first notch edge 75e. The second notch edge 76e is connected to the first notch edge 75e at the predetermined position Pe. The second cutout edge 76 intersects the radius Re1 passing through the predetermined position Pe at a predetermined angle θe2 in plan view.

Further, the second notch edge 76e is in a direction D2 opposite to the disaggregation process in the range from the predetermined radial position Pe of the notch 18e, which is a discontinuous portion of the blade 15e, to the predetermined position Ve on the outer peripheral side by a predetermined amount. The rotation direction front end edge is formed. The angle θe3 formed by the second notch edge 76e and the rotation direction D3 of the stirring blade 41e at the predetermined position Pe that is the radial center end of the second notch edge 76e intersects at 110 ° or less. It is formed. As an example, FIG. 13 shows a case where the angle θe3 formed by the second notch edge 76e and the rotation direction D3 at the predetermined position Pe is about 109 °. Thus, when the second notch edge 76e rotates counterclockwise in the direction D2 opposite to that during the disaggregation process, the foreign object J can be easily locked as shown by a thick practice and a broken line in FIG. .

The fold line 72e is formed in parallel with the first missing edge 75e. The fold line 72e is not formed on the radius Re3 connecting the predetermined position Qe that is the outer peripheral edge side end portion of the fold line 72e and the rotation center Ce, and intersects the radius Re3 at a predetermined angle θe4.

The protrusion part 19e comprises the discontinuous location of the blade | wing part 15e. Further, the leading edge 192e of the projecting portion 19e constitutes the front edge in the rotational direction in the direction D2 opposite to the disaggregation process in the range from the predetermined radial position Se to the predetermined position We near the outer peripheral edge on the outer peripheral side by a predetermined amount. To do. Then, an angle θe5 formed by the rotation direction D4 of the stirring blade 41e at the predetermined position Se is formed to intersect at 110 ° or less. That is, when the stirring blade 41e rotates clockwise in FIG. 13, which is the direction D2 opposite to that during the disaggregation process, the leading edge 192e of the protruding portion 19e contacts the used paper pulp liquid as the front edge in the rotational direction. FIG. 13 shows a case where the angle θe5 formed by the leading edge 192e and the rotation direction D4 at the predetermined position Se is about 25 °. Thus, the foreign matter J can be easily locked to the leading edge 192e of the protruding portion 17e.

Further, the foreign matter locking portion 17e is a convex portion 77 in which the front end edge in the rotation direction D2 in the opposite direction to the disaggregation processing of the discontinuous portion of the blade portion 15e protrudes forward in the rotation direction from the center side in the radial direction. Is provided. The convex part 77 is comprised by the front-end edge 192e of the protrusion part 19e in 5th Embodiment. The leading edge 192e of the protruding portion 19 becomes the front edge in the rotation direction when rotating in the direction D2 opposite to that during the disaggregation process. The leading edge 192e protrudes in the rotational direction of the reverse direction D2 from the predetermined position Se near the outer peripheral end in the radial direction of the stirring blade 41e from the predetermined position Se near the central end. Formed.

Thus, for example, as shown in FIG. 14, when the used paper pulp liquid is taken out, the foreign matter J once locked to the convex portion 77 is gradually reduced in diameter by rotation in the direction D2 opposite to that during the disaggregation processing of the stirring blade 41e. It moves to the direction center side and is collected around a predetermined position Se in the vicinity of the radial center side end or locked to the second notch edge 76e. The outer peripheral side of the stirring blade 41e has a longer moving distance during rotation than the central side. For this reason, the outer peripheral side tends to lock the foreign matter J more easily than the center side. Since the foreign matter J once locked on the outer peripheral side of the stirring blade 41e is gradually moved to the radial center side as it rotates, the foreign matter J is removed from the outer peripheral side position without staying at the outer peripheral side position. The Then, another foreign matter J becomes easier to be locked at the outer peripheral side position, and as a result, many foreign matters can be locked.

( Sixth embodiment)
FIG. 15 shows a plan view of a stirring blade 41f according to the sixth embodiment. In the stirring blade 41f shown in the figure, a large number of foreign matter locking portions 17f are provided on the flat surface portion 16f of the blade portion 15f. The foreign matter locking portion 17f is provided at the substantially central portion in the radial direction in addition to the outer peripheral side of the blade portion 15f. FIG. 15 shows a case where the foreign matter locking portions 17f1 and 17f2 on both the outer peripheral side and the substantially central portion in the radial direction are respectively provided at eight locations. The foreign matter locking portion 17f1 provided on the radially outer peripheral side is formed in parallel along a radius that extends radially from the rotation center Cf toward the outer peripheral edge. On the other hand, the foreign matter locking portion 17f2 provided at the substantially central portion in the radial direction is not formed in parallel along the radius extending radially from the rotation center Cf toward the outer peripheral edge, but is formed inclined at a predetermined angle in the radial direction. .

The radial length Lf of the protruding portion 19f constituting each foreign matter locking portion 17f can be formed to be about 1/8 to 1/3 of the length from the rotation center Cf of the stirring blade 41f to the outer peripheral edge. .

The notch 18f2 provided in the substantially central portion in the radial direction is formed in a U shape in a plan view. In the cutout portion 18f2, two parallel second cutout edges 76f2 and one third cutout edge 79 are substantially orthogonal. The third notch edge 79 is formed so as to connect the rotation direction front end in the direction D2 opposite to the disaggregation process of the second notch edge 76f2.

The foreign matter locking portion 17f includes a convex portion 77f whose front end edge in the rotational direction D2 is opposite to that in the disaggregation process of the discontinuous portion of the blade portion 15f and whose outer peripheral side in the radial direction protrudes forward in the rotational direction from the center side. . The convex portion 77f is configured by a tip edge 192e of a protruding portion 19f provided at a substantially central portion in the radial direction.

In addition, the foreign matter locking portion 17f is formed from the predetermined radial positions Sf1 and Sf2 with respect to the leading edge 192f of the projecting portions 19f1 and 19f2 on both the radially outer peripheral side and the substantially central portion in the radial direction, which are discontinuous portions of the blade portion 15e. An angle θf2 formed by the rotation direction front end edge in the reverse direction D2 and the rotation direction D4f of the stirring blade 41f at the predetermined positions Sf1 and Sf2 in the range up to the predetermined positions Wf1 and Wf2 on the outer peripheral side of the predetermined amount. It is formed so that θf3 intersects at 110 ° or less. Thus, the foreign matter J can be easily locked to the tip edge 192f of the protruding portion 17f.

( Seventh embodiment)
FIG. 16A is a plan view of a stirring blade 41g according to the seventh embodiment, and FIG. 16B is a front view thereof. The stirring blade 41g shown in the figure is formed such that the notches 18g between the four protruding portions 19g provided on the radially outer peripheral side are larger than the notches 18, 18a to 18f of the first to sixth embodiments. ing. The flat portion 16g is provided in a predetermined range near the rotation center Cg, and is smaller than the first to sixth embodiments. Thus, the rotational load of the stirring blade 41g can be reduced by reducing the flat surface portion 16g.

( Eighth embodiment)
FIG. 17 is a plan view of a stirring blade 41h according to the eighth embodiment, and FIG. 18 is a cross-sectional view taken along the line II in FIG. The stirring blade 41h shown in FIGS. 17 and 18 is not formed in parallel with the radius in which the foreign matter locking portion 17h extends radially from the rotation center Ch toward the outer peripheral edge, like the stirring blade 41e shown in FIG. Inclined by a predetermined angle with respect to the direction.

Moreover, the protrusion part 19h which comprises the foreign material latching | locking part 17h is comprised by the member different from the blade | wing part 15h. The protrusion 19h is formed in a columnar shape whose cross section is a pentagon having at least one obtuse angle. One surface forming one obtuse angle of the pentagon is installed at a predetermined position on the upper surface of the blade portion 15 and is fixed by a screw 65h from below. Then, the other surface constituting the obtuse angle is located on the front surface in the rotational direction D2 opposite to the disaggregation process shown in the clockwise direction in FIG. A plurality of through holes 66 through which the screws 65h are inserted are arranged in parallel in the width direction at a place where the protruding portion 19h is installed on the blade portion 15h.

The protruding portion 19h includes an inclined portion 74h formed in an upward gradient toward the front in the rotation direction D2 opposite to that during the disaggregation process of the stirring blade 41h. The oblique portion 74h includes a rear oblique portion 74h1 that is rearward in the rotation direction D2 opposite to that during the disaggregation process of the projecting portion 19h, and a front oblique portion 74h2 that is forward. The front oblique portion 74h2 has an upper portion at a forward position in the rotation direction D2 in the reverse direction from the lower portion. Accordingly, the foreign matter J mixed in the waste paper pulp liquid can be locked in front of the front oblique portion 74h2.

And the foreign material latching | locking part 17h is provided with the convex part 77h where the rotation direction front end edge of the protrusion part 19h which is a discontinuous location of the blade | wing part 15h protruded to the rotation direction front from the center side.

Further, the foreign matter locking portion 17h is rotated in a range from a predetermined radial direction position Sh of the protruding portion 19h, which is a discontinuous portion of the blade portion 15h, to a radially outer peripheral end portion Uh of the protruding portion 19h which is a predetermined amount outer peripheral side. The angle θh formed between the front edge of the direction and the rotation direction of the reverse direction D2 of the stirring blade 41h at a predetermined value Sh which is the radial center end of the protrusion 19h is formed to intersect at 110 ° or less.

In addition, the notch parts 18 and 18a-18g are not formed in the stirring blade 41h concerning 8th Embodiment shown to FIG.

( Ninth embodiment)
Fig.19 (a) shows the top view of the stirring blade 41i concerning 9th Embodiment. In the stirring blade 41i according to the ninth embodiment shown in the figure, the blade portion 15i extending from the rotation center Ci toward the inner wall of the stirring tank 29 has a circular flat plate at least partially discontinuous in the circumferential direction. Notched and formed. For this reason, the blade portion 15i is provided with a flat surface portion 16i in the entire range from the rotation center Ci to the radially outer peripheral edge. And the foreign material latching | locking part 17i of the stirring blade 41i is comprised only by the notch part 18i which notched the plane part 16i, and the protrusion parts 19 and 19a-19h are not provided.

The foreign matter locking portion 17i includes a convex portion 77i in which the front end edge in the rotational direction of the notch 18i, which is a discontinuous portion of the blade portion 15i, protrudes forward in the rotational direction from the center side in the radial direction. Accordingly, the foreign matter locked to the convex portion 77i of the notch 18i gradually moves toward the radial center with the rotation of the stirring blade 41i. Therefore, the foreign matter J once locked in the notch 18i can be prevented from coming off the outer peripheral edge of the blade portion 15i to the outside of the stirring blade 41i, and the foreign matter can be reliably locked.

In addition, the foreign matter locking portion 17i is in a range from a predetermined position Pi that is a radial center side end portion of the notch 18i that is a discontinuous portion of the blade portion 15i to an outer peripheral edge of the stirring blade 41i that is a predetermined amount outer peripheral side. The angle θi formed between the front edge of the rotation direction and the rotation direction in the direction D2 opposite to that during the disaggregation processing of the stirring blade 41i at the predetermined position Pi that is the radial center end of the notch 18i intersects at 110 ° or less. It is formed. FIG. 19A shows a case where the angle θi is about 45 ° as an example. Thereby, compared with the case where the angle θi is formed at an angle larger than 110 °, the foreign matter can be easily locked to the foreign matter locking portion 17i.

( Tenth embodiment)
FIG. 19B is a plan view of the stirring blade 41j according to the tenth embodiment. In the stirring blade 41j according to the tenth embodiment shown in the same figure, the blade portion 15j is flat in the entire range from the rotation center Cj to the radially outer peripheral edge, like the stirring blade 41i according to the ninth embodiment. While the part 16j is provided, the foreign matter locking part 17j of the stirring blade 41j is configured only by the notch part 18j obtained by notching the flat part 16j.

However, the foreign matter locking portion 17j of the stirring blade 41j shown in FIG. 19 (b) is different from the foreign matter locking portion 17i shown in FIG. 19 (a) in the shape of the cutout portion 18j of the blade portion 15j. A rotation direction front end edge in a range from a predetermined position Pj which is a radial center end of the portion 18j to a predetermined position Uj on the outer peripheral edge is formed on a radius extending from the rotation center Cj to a predetermined position on the outer peripheral edge. . Accordingly, the angle θj formed by the rotation direction in the reverse direction D2 of the stirring blade 41j at the end portion on the radial center side of the notch 18j intersects at about 90 ° which is 110 ° or less. In FIG. 19B, the front end edge in the rotational direction is not provided with convex portions 77 and 77i in which the outer peripheral side in the radial direction protrudes forward in the rotational direction from the center side.

( Eleventh embodiment)
Fig.20 (a) shows the top view of the stirring blade 41k concerning 11th Embodiment. In the stirring blade 41k according to the eleventh embodiment, the front end edge in the rotational direction D2 in the reverse direction D2 protrudes forward in the rotational direction in the notch portion 18k in the clockwise disaggregation process shown in FIG. 20A of the stirring blade 41k. A convex portion 77k is provided. The range from the radial position predetermined position Pk of the blade portion 15k to the predetermined position Uk on the outer peripheral side by a predetermined amount protrudes forward in the rotation direction in the reverse direction D2, and the range from the predetermined position Uk to the outer peripheral edge is the diameter of the convex portion 77k. It is formed along the direction.

Further, a convex portion 70 is provided at the rear end edge of the notch portion 18k so as to protrude rearward in the rotation direction D2 shown in the clockwise direction in FIG. Accordingly, even if the stirring blade 41k rotates in either the forward or reverse direction, the foreign matter locked to the foreign matter locking portion 17k moves to the center side with the rotation of the stirring blade 41k. The foreign matter locked to the locking portion 17k can be prevented from coming off the blade portion 15k to the outside of the stirring blade 41k due to centrifugal force or the like, and can be kept locked to the foreign matter locking portion 17k.

(Twelfth Embodiment)
FIG. 20B is a plan view of the stirring blade 41m according to the twelfth embodiment. The blade portion 15m of the stirring blade 41m according to the twelfth embodiment is formed in a cross shape in plan view. As for the blade | wing part 15m, the plane part 16m is provided in the whole range. A foreign matter locking portion 17m is provided at each tip of the cross-shaped blade portion 15m. The foreign matter locking portion 17m is formed to be bent in a bowl shape. The foreign matter locking portion 17m curved in a bowl-like shape has a convex portion 77m in which the rotation direction front end edge in the direction D2 opposite to that during the disaggregation processing of the blade portion 15m protrudes from the center side toward the rotation direction forward from the center side. Constitute.

Since the foreign matter locking portion 17m is formed in a bowl shape, the foreign matter mixed in the waste paper pulp liquid can be easily locked. Further, the blade portion 15m is formed such that the front end side in the positive direction D1, which is the rotation direction during the disaggregation process of the waste paper 10 shown in the counterclockwise direction in FIG. 20B, is linearly formed from the rotation center Cm side end portion to the outer peripheral edge. Therefore, the load on the drive unit 43 can be reduced during the disaggregation process of the used paper 10.

( 13th Embodiment)
FIG. 21 is a plan view of a stirring blade 41n according to the thirteenth embodiment. The stirring blade 41n according to the thirteenth embodiment is a predetermined amount inward without extending the notch 18n to the outer peripheral edge of the notch 18 of the stirring blade 41 according to the first embodiment shown in FIGS. By setting it to the position, the notch 18n is formed in a U shape in a plan view. Accordingly, the flat portion 16n of the stirring blade 41n is connected in a circular shape at the outer peripheral edge, so that the strength of the stirring blade 41n can be improved.

( Fourteenth embodiment)
22 is a plan view of a stirring blade 41p according to the fourteenth embodiment, and FIG. 23 is a cross-sectional view taken along the line II-II in FIG. The stirring blade 41p according to the fourteenth embodiment has a configuration in which the stirring blade 41h according to the eighth embodiment shown in FIG. 17 and the stirring blade 41n according to the thirteenth embodiment shown in FIG. 21 are combined. . That is, the notch 18p of the stirring blade 41p does not reach the outer peripheral edge, but is formed from the outer peripheral edge of the stirring blade 41p to a predetermined amount inward position. The shape of the notch 18p is rectangular in plan view, and a predetermined position of the blade 15p is punched in the vertical direction. As a result, the outer peripheral edge of the flat surface portion 16p is continuously formed in the circumferential direction E and is connected in a circular shape, so that the strength of the stirring blade 41p can be improved, and the end portion of the flat surface portion 15 where the cutout portion 18 is formed is made of used paper. It is possible to suppress or prevent bending due to mechanical action during the disaggregation process.

The protrusion 19h shown in FIG. 17 is formed at a predetermined angle with respect to the radial direction extending radially from the rotation center Ch toward the outer peripheral edge. However, the protrusion 19h of the stirring blade 41p according to the fourteenth embodiment shown in FIG. The protrusion 19p is formed in parallel with a radius that extends radially from the rotation center Cp toward the outer peripheral edge. Thus, when the stirring blade 41p is manufactured, the protruding portion 19p can be easily positioned when it is fixed at a predetermined position on the flat portion 16p.

The protruding portion 19p is configured by a member different from the blade portion 15p. As shown in FIG. 23, the protrusion 19p has an upper surface and a lower surface formed in parallel to the horizontal plane. The cross-sectional shape of the protrusion 19p shown in FIG. 23 is formed in a trapezoid whose upper part protrudes in the direction D2 opposite to the rotation direction during the disaggregation process. The protruding portion 19p is installed at a predetermined position on the upper surface of the blade portion 15p, and is fixed by a screw 65p from below.

The protrusion 19p includes an inclined portion 74p formed in an upward gradient toward the front in the rotation direction D2 opposite to that during the disaggregation process of the stirring blade 41p. The oblique portion 74p includes a rear oblique portion 74p1 that is rearward in the rotational direction D2 opposite to that during the disaggregation process of the projecting portion 19h, and a front oblique portion 74p2 that is forward. The front oblique portion 74p2 has an upper portion at a forward position in the rotation direction D2 in the reverse direction from the lower portion. Thus, the foreign matter J mixed in the waste paper pulp liquid can be locked in front of the front inclined portion 74p2, and the foreign matter J locked by the front inclined portion 74p2 passes through the notch portion 18p. It enters below the blade portion 15p. Thus, since both the protrusion part 19p and the notch part 18p are provided and these are formed adjacently, the foreign material J can be more reliably latched.

Further, the foreign matter locking portion 17p rotates in a range from a predetermined radial direction position Sp1 of the protruding portion 19p, which is a discontinuous portion of the blade portion 15p, to a radially outer peripheral end portion Up1 of the protruding portion 19p that is a predetermined amount outer peripheral side. The angle θp formed between the front edge of the direction and the rotation direction of the reverse direction D2 of the stirring blade 41p at a predetermined value Sp1 which is the radial center side end of the protrusion 19p is formed to intersect at 110 ° or less.

In the above embodiment, the stirring blades 41, 41a to 41p are provided with the flat portions 16 and 16a to 16p at least in a predetermined range near the rotation center. May be. Moreover, although the notches 18, 18a to 18p are provided adjacent to the protrusions 19, 19 to 19p, the protrusions and the notches may be provided at positions separated from each other.

In addition, the regeneration processing apparatus 1 is provided with the deinking unit 5, but does not include the deinking unit 5, and sends the used paper pulp liquid manufactured by the used paper pulp manufacturing unit 3 to the paper making unit 6 without deinking, It is good also as making paper.

J Foreign matter F Waste paper processing device 10 Waste paper 16, 16a to 16p Flat portion 17, 17a to 17p Foreign matter locking portion 18, 18a to 18p Notch portion 19, 19a to 19p Protrusion portion 29 Stirring tank 41, 41a to 41p Stirring blade 43 Drive Portion 74, 74a to 74hp Slope 77, 77f to 77m Convex

Claims (7)

A stirring tank provided with a stirring blade for stirring waste paper with water;
A drive unit that rotationally drives the stirring blade,
The stirring blade, the catching portion is provided Rutotomoni for locking the foreign matter mixed in the stirring vessel, the plane portion is provided in a predetermined range of at least the rotational center vicinity,
The waste paper processing apparatus, wherein the foreign matter locking portion includes a protruding portion that protrudes upward from the planar portion . A stirring tank provided with a stirring blade for stirring waste paper with water;
A drive unit that rotationally drives the stirring blade,
The stirring blade is provided with a foreign matter locking portion for locking foreign matter mixed in the stirring tank, and at least a flat portion is provided in a predetermined range near the rotation center,
The foreign matter locking portion includes a protruding portion that protrudes at least above or below the flat surface portion, and the protruding portion is an inclined portion that is formed in an upward slope toward the front in the rotational direction of the stirring blade. Used paper processing equipment. A stirring tank provided with a stirring blade for stirring waste paper with water;
A drive unit that rotationally drives the stirring blade,
The stirring blade is provided with a foreign matter locking portion for locking foreign matter mixed in the stirring tank, and at least a flat portion is provided in a predetermined range near the rotation center,
The waste paper processing apparatus, wherein the foreign matter locking portion includes a cutout portion formed by cutting out the flat portion. The used paper processing apparatus according to claim 3, wherein the notch is provided adjacent to the protrusion. The stirring blade extends from the center of rotation toward the inner wall of the stirring tank, and is provided with a blade portion formed at least partially discontinuously in the circumferential direction.
The foreign matter locking portion includes a convex portion in which a front end edge in the rotational direction of the discontinuous portion of the blade portion protrudes forward in the rotational direction from the center side on the outer peripheral side in the radial direction. Waste paper processing device as described in 1. The stirring blade extends from the center of rotation toward the inner wall of the stirring tank, and is provided with a blade portion formed at least partially discontinuously in the circumferential direction.
The foreign matter locking part has an angle formed by a rotation direction front end edge in a range from a predetermined position in the radial direction of the discontinuous portion of the blade part to a predetermined amount outer peripheral side and a rotation direction of the stirring blade at the predetermined position at 110 ° or less. The used paper processing apparatus according to any one of claims 1 to 5, wherein the used paper processing apparatus is formed so as to intersect. With waste paper and stirred in a stirred vessel by stirring blades with water, then lock the foreign matters mixed in the stirring vessel to the catching portion provided on the stirring blades, stirring the used paper pulp solution prepared in a stirred tank A used paper processing method in which the stirring blade rotates in the opposite direction to that during the disaggregation process before being taken out of the tank .

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