JP2012102442A - Wet paper dewatering device and waste paper recycling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wet paper dewatering device that hardly causes a damage to a water suction belt for dewatering wet paper and is capable of improving durability of the water suction belt, and to provide a waste paper recycling device provided with the wet paper dewatering device.SOLUTION: The wet paper dewatering device is provided with a tension adjustment device 34 configured to move by moving means 36 at least one roller 32c among a plurality of rollers 32a, 32b and 32c over which a water suction belt 31 is bridged. The moving means 36 is provided with a movable roller axis supporting member 47 that rotatably supports a rotation axis 66 of the movable roller 32c; a tension spring 46, one end side of which is locked to the movable roller axis supporting member 47; a locking member 44 which locks the other end side of the tension spring 46; and a driving part 42 for tension adjustment to move the locking member 44 to a predetermined position.

Description

  The present invention relates to a wet paper dewatering device and a used paper recycling apparatus.

Conventionally, there has been known a wet paper dewatering device for dewatering a wet paper obtained by making a pulp suspension as a paper raw material. Patent Document 1 listed below discloses a water absorption belt that circulates to transport wet paper. A technique is disclosed in which at least one of a plurality of rollers around which a water absorbing belt is wound is formed as a tension adjusting roller, and the tension adjusting roller is held by an actuating drive device in an adjustable manner. ing.

JP 2004-360166 A

However, since the wet paper web dehydrating device described in Patent Document 1 uses the operation drive device to forcibly move the installation position of the tension adjusting roller to adjust the tension of the water absorbing belt, the water absorbing belt is damaged. Cheap.

SUMMARY OF THE INVENTION The present invention solves the above-described problems, and a wet paper web dewatering device that hardly damages the water absorbent belt for dewatering the wet paper web and can enhance the durability of the water absorbent belt, and the wet paper web dewatering device. It is an object of the present invention to provide a used paper recycling apparatus.

  In order to achieve the above object, a wet paper web dewatering device according to claim 1 includes an endless water absorbent belt for conveying wet paper in a wet state, a water absorbent belt and another belt, and a water absorbent belt. A wet paper web dewatering device comprising a dewatering roller pair for dewatering by pressing the wet paper web between the two belts via another belt, and a tension adjusting device for adjusting the tension of the water absorbing belt. The movable roller shaft support portion is configured such that at least one of the plurality of rollers around the water absorbing belt is movable by the moving means, and the moving means rotatably supports the rotation shaft of the movable roller. Material, a tension spring whose one end is locked to the movable roller shaft support member, a locking member that locks the other end of the tension spring, and a tension adjustment drive unit that moves the locking member to a predetermined position. It is provided.

According to a second aspect of the present invention, in the wet paper web dewatering device according to the first aspect, the tension adjusting drive unit includes a tension adjusting motor and a screw shaft that is rotated by driving the tension adjusting motor. And a nut portion into which the screw shaft is screwed is provided on the locking member.

The invention described in claim 3 is an endless water absorbing belt for conveying wet paper in a wet state, and a water absorbing belt and another belt are sandwiched between the two belts via the water absorbing belt and the other belt. A wet paper dewatering device comprising a pair of dewatering rollers that presses and dewaters the wet paper and a meandering correction device that corrects the meandering of the water absorption belt. This is a wet paper web dewatering device including a roller and a roller angle adjusting unit that tilts the meandering correction roller with respect to the width direction orthogonal to the traveling direction of the water absorbing belt.

  Further, according to a fourth aspect of the present invention, in the wet paper web dewatering device according to the third aspect, the roller angle adjusting unit includes a pair of left and right meandering correction roller shafts that rotatably support the meandering correction roller. A meandering correction drive unit that moves one of the meandering correction roller shaft support members of the left and right meandering correction roller shaft members with respect to the other meandering correction roller shaft support member along the traveling direction of the water absorption belt. It is prepared.

Further, the invention described in claim 5 is a wet paper web dewatering device provided with the tension adjusting device according to claim 1 or 2, and the meandering correction device according to claim 3 or 4. .

Furthermore, the invention described in claim 6 is a regenerated pulp manufacturing section that disaggregates waste paper to produce a pulp suspension, and a wet paper that forms a wet paper by making the pulp suspension manufactured in the regenerated pulp manufacturing section. A paper forming section;
The wet paper web dewatering device according to any one of claims 1 to 5 for dewatering the wet paper web formed by the wet paper web forming unit, and the wet paper web dehydrated by the wet paper web dewatering device, A used paper recycling apparatus including a drying unit for manufacturing recycled paper.

According to the wet paper web dewatering device of the first aspect, the tension adjusting device is configured such that at least one of the plurality of rollers around the water absorbing belt is movable by the moving device, and the moving device has the moving device. A movable roller shaft supporting member that rotatably supports the rotating shaft of the movable roller, a tension spring having one end locked to the movable roller shaft supporting member, and a latch for locking the other end of the tension spring Since the member and the tension adjusting drive unit that moves the locking member to a predetermined position are provided, the tension adjusting drive unit is driven to move the movable roller shaft support member via the locking member and the tension spring. The movable roller can be moved to adjust the tension of the water absorption belt. Therefore, since the driving force of the tension adjusting drive unit is applied via the urging force of the tension spring without directly applying the driving force to the water absorbing belt, the water absorbing belt is hardly damaged.

According to the second aspect of the present invention, the tension adjustment drive section includes a tension adjustment motor and a screw shaft that is rotated by the drive of the tension adjustment motor. Since the nut portion to be screwed is provided, the tension of the water absorption belt can be easily adjusted with a simple structure.

  According to the invention described in claim 3, the meandering correction device inclines the meandering correction roller whose outer peripheral surface is in rolling contact with the water absorbing belt and the meandering correction roller with respect to the width direction orthogonal to the traveling direction of the water absorbing belt. Since the roller angle adjusting unit is provided, the meandering of the water absorbing belt can be easily corrected by adjusting the angle of the meandering correction roller by the roller angle adjusting unit.

According to a fourth aspect of the present invention, the roller angle adjustment unit includes a pair of left and right meandering correction roller pivoting members that pivotally support the meandering correction roller and a left and right meandering correction roller pivoting member. Since the meandering correction roller shaft support member is provided with a meandering correction drive unit for moving the meandering correction roller shaft support member along the running direction of the water absorption belt with respect to the other meandering correction roller shaft support member, the water absorption belt is not damaged. It is possible to easily correct the meandering of the water absorption belt.

  Furthermore, according to the invention described in claim 5, since the tension adjusting device according to claim 1 or 2 and the meandering correction device according to claim 3 or 4 are provided, the tension adjusting device is provided. Thus, the meandering of the water absorbing belt can be corrected by the meandering correction device while adjusting the tension of the water absorbing belt, and the wet paper can be dehydrated properly without excessive force being applied to the water absorbing belt.

Furthermore, according to the invention described in claim 6, a recycled pulp manufacturing unit that disaggregates used paper to produce a pulp suspension, and forms a wet paper by making the pulp suspension manufactured by the recycled pulp manufacturing unit. The wet paper web forming unit, and the wet paper web dewatering device according to any one of claims 1 to 5 and the wet paper web dewatering device for dewatering the wet paper web formed by the wet paper web forming unit. The wet paper is dried to produce recycled paper, so that the wet paper formed in the wet paper forming part can be efficiently and properly dehydrated with a wet paper dewatering device to obtain good quality recycled paper. It is possible.

1 is a schematic configuration diagram of a used paper recycling processing apparatus according to an embodiment of the present invention. It is a longitudinal cross-sectional view which shows schematic structure of the paper making part of the said used paper reproduction | regeneration processing apparatus. It is a longitudinal cross-sectional view which shows the structure of the tension adjustment apparatus of the said papermaking part. It is the figure which looked at the said tension adjustment apparatus from the right side. It is a top view of the tension adjusting device. It is the figure which looked at the tension adjusting device from the front. It is a perspective view of the meandering detection means of the paper making part. It is the figure which looked at the meandering correction means of the said papermaking part from the left side. It is a perspective view of the meandering correction means.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a used paper recycling apparatus according to the present invention. In FIG. 1, a used paper recycling apparatus 100 includes a recycled pulp manufacturing unit 1, a deinking unit 2, a paper making unit 3, a finishing unit 4, and a control unit 8 for controlling each unit in a casing (not shown).

In the following description, the wet paper dewatering device D according to the present invention is used for the paper making unit 3 of the used paper recycling apparatus 100 for producing the recycled paper 7 using the used paper 6 as a raw material. However, the present invention is not necessarily limited thereto. Alternatively, it may be used for a paper making section of a paper making apparatus using other pulp raw materials such as wood.

The regenerated pulp manufacturing unit 1 disintegrates the waste paper 10 to manufacture a pulp suspension, and the deinking unit 2 deinks the pulp suspension manufactured in the regenerated pulp manufacturing unit 1. The paper making section 3 is for making a wet paper by making a paper suspension of the deinked pulp obtained in the deinking section 2, dehydrating the dried wet paper, and drying it. Is to finish the recycled paper 7 before finishing obtained in the paper making section 3 to obtain a standard size recycled paper 7 by cutting or the like. The control unit 8 controls the operation of the used paper recycling processing apparatus 100 as a whole. The regenerated pulp manufacturing unit 1 and the deinking unit 2 can use known regenerated pulp manufacturing devices and deinking devices, respectively.

FIG. 2 is a longitudinal sectional view of the paper making apparatus S constituting the paper making unit 3. In the following, the right side of the paper making apparatus S shown in FIG. 2 will be described as “front side”, the left side as “rear side”, the front side of the paper surface of FIG. 2 as “right side”, and the back side of the paper surface as “left side”. To do. The paper making unit 3 includes a wet paper web forming unit 11, a dehydrating unit 14, and a drying unit 15 housed in a casing 41. The wet paper web forming unit 11 includes a head box 12 and a wire unit 13. In the casing 41, a pair of left and right side plates 37, 38 are disposed, and these side plates 37, 38 pivotally support most of the rollers constituting each part.

The head box 12 is for uniformly supplying the pulp suspension after deinking onto the papermaking wire 23. The head suspension 12 stores the pulp suspension and the pulp suspension stored in the storage unit 18. It has the outflow part 19 which makes a liquid flow out on the papermaking wire 23, and the inflow part 20 of the pulp suspension formed in the bottom part of the storage part 18. As shown in FIG.

The wire unit 13 includes an endless paper-making wire 23 that is stretched over a plurality of rollers 24. Below the forward path of the papermaking wire 23, a plurality of vertical plates 26 for draining the pulp suspension are arranged at predetermined intervals in the traveling direction of the papermaking wire 23. Are arranged so as to be in sliding contact with the lower surface of the papermaking wire 23 in a direction crossing the traveling direction. Thereby, the vertical plate 26 guides the white water flowing down from the mesh of the papermaking wire 23 downward.

A water receiving portion 27 is provided below the vertical plate 26 for receiving white water flowing directly from the vertical plate 26 or from the mesh of the papermaking wire 23. The water receiving unit 27 is connected to a white water tank 29 installed below. The white water tank 29 includes a pipe and a pump (not shown) for sending white water stored therein to the regenerated pulp manufacturing unit 1 and the deinking unit 2, and is configured so that the white water collected in the water receiving unit 27 can be reused. .

The dewatering unit 14 includes a wet paper web dewatering device D. The wet paper web dewatering device D includes a water absorption belt 31, a plurality of rollers 32a, 32b, and 32c, a tension adjusting device 34, and a meandering correction device 35. The dehydrating roller pair 120 and the water supply unit 40 are provided. The water absorption belt 31 conveys wet paper in a wet state, is formed endlessly with a water-absorbing material such as felt or a blanket, and is stretched between a plurality of rollers 32a, 32b, and 32c. . The water absorbing belt 31 is in contact with the paper making wire 23 disposed below and the drying belt 16 of the drying unit 15 disposed above at predetermined positions, respectively, and the wet paper web is sequentially transferred at the contact portion. It is like that.

Of the rollers 32a, 32b, and 32c around which the water absorbing belt 31 is stretched, the two upper and lower rollers 32a and 32b positioned on the front side are fixedly supported rotatably on the left and right side plates 37 and 38. However, the roller 32c located on the rear side is a movable roller 33 which is guided by a long hole 39 formed in the left and right side plates 37, 38 and is movable in the horizontal direction. The movable roller 33 is moved in its installation position to adjust the tension of the water absorbing belt 31 by the moving means 36 of the tension adjusting device 34 provided outside the left and right side plates 37 and 38, respectively.

3 is a longitudinal sectional view showing the configuration of the tension adjusting device 34 provided outside the right side plate 38, FIG. 4 is a view of the tension adjusting device 34 viewed from the right side, and FIG. 5 is a plan view of the tension adjusting device 34. FIG. 6 and FIG. 6 are views of the tension adjusting device 34 as viewed from the front. The tension adjusting device 34 provided outside the left side plate 37 has the same configuration as that provided outside the right side plate 38. The tension adjusting device 34 is configured as a moving means 36 for the movable roller 33. The moving means 36 includes a tension adjusting drive section 42, a screw shaft 45, a locking member 44, a tension spring 46, and a movable roller shaft support section. The material 47 is provided.

The tension adjustment drive unit 42 includes a tension adjustment motor 49, a drive gear 51 fixed to the drive shaft 50 of the tension adjustment motor 49, and a driven gear 52 that meshes with the drive gear 51. In this embodiment, the screw shaft 45 is configured as the screw shaft 45 of the trapezoidal screw 43, but may be a ball screw instead of the trapezoidal screw 43. One end of the screw shaft 45 is fixed to the rotation center of the driven gear 52, and the other end is pivotally supported by a bearing 57 provided on the screw shaft support member 56. The screw shaft support member 56 is fixed to the right side plate 38. Further, the screw shaft 45 is slidably supported by a support member 59. The support member 58 is disposed opposite to the driven gear 52 at a position in front of the driven gear 52j, and is fixed to the right side plate 38. . As a result, the screw shaft 54 rotates as the driven gear 52 rotates in both forward and reverse directions.

The locking member 44 is located between the movable roller 33 and the tension adjustment motor 49, and is provided with a nut portion 60 that penetrates in the front-rear direction and engages with the screw shaft 45. Thus, the locking member 44 moves horizontally in the front-rear direction. As shown in FIGS. 5 and 6, a guide hole 61 is formed through the lower outer side of the locking member 44, and a guide rod 62 is inserted therethrough.

As shown in FIGS. 3 and 4, two tension springs 46 are arranged side by side, and each tension spring 46 is locked to the movable roller shaft support member 47 at one end side and to the locking member 44 at the other end side. Are arranged horizontally in the front-rear direction. The tension spring 46 is inserted through a through hole 64 formed above and below the bearing 57 of the screw shaft support member 56.

The movable roller shaft support member 47 rotatably supports the rotation shaft 66 of the movable roller 33. The rotary shaft 66 of the movable roller 33 is inserted into the long hole 39 and protrudes outward from the left and right side plates 37 and 38. The movable roller shaft support member 47 is pulled by the tension spring 46 and moves in the horizontal direction as the locking member 44 advances and retreats.

Further, the tension adjusting device 34 has three sensors, that is, a maximum tension detection sensor 68, a slack detection sensor 69, and a tension release sensor 70. Each sensor uses a U-shaped photo interrupter.

The maximum tension detection sensor 68 is a limiter for limiting the maximum tension, and is fixed to the side plate 38 at a position above the locking member 44. The maximum tension detection sensor 68 is aligned immediately above the locking member 44 when the maximum tension is applied to the water absorption belt 31 and the movable roller 33 and the locking member 44 are in the rearmost position. On the other hand, a first light shielding plate 72 is erected on the upper surface of the locking member 44. The first light shielding plate 72 shields the maximum tension detection sensor 68 when the locking member 44 reaches the rearmost position.

The slack detection sensor 69 is provided outside the locking member 44, and is installed inside a hanging portion 74a (see FIGS. 4 and 6) of a support plate 74 having one end fixed to the upper surface of the locking member 44. Yes. On the other hand, on the side surfaces of the locking member 44 and the movable roller shaft support member 47, an erection member 75 slidably provided between the both is provided. In the vicinity of the rear end portion of the erection member 75, a second light shielding plate 76 for detection of the slack detection sensor 69 is installed. The second light shielding plate 76 is provided so as to protrude toward the slack detection sensor 69 side, and the second light shielding plate 76 shields the slackness detection sensor 69 to detect that the tension of the water absorbing belt 31 is slack. .

As shown in FIG. 4, the erection member 75 has a front end portion fixed to the movable roller shaft support member 47 by a screw 77 and a rear end portion joined to the locking member 44 by a pin 79. The pin 79 is inserted through a horizontally elongated long hole 78 formed in the rear end portion of the erection member 75, and when the distance between the locking member 44 and the movable roller shaft support member 47 varies, the pin 79 is long. A pin 79 moves in the hole 78.

The tension release sensor 70 is fixed to the right side plate 38 that is located almost directly below the maximum tension detection sensor 68. A third light shielding plate 81 is suspended from the lower portion of the locking member 44. The third light shielding plate 81 is formed to be long in the front-rear direction, and while the third light shielding plate 81 shields the tension release sensor 70, tension is applied to the water absorbing belt 31, while the third light shielding plate 81 It is detected that the tension applied to the water absorption belt 31 is released by the rear end 81a of the light shielding plate 81 being removed from the tension release sensor 70 and the tension release sensor 70 being light-transmitted.

The meandering correction device 35 shown in FIG. 2 is for correcting the meandering of the water absorption belt 31 and includes meandering detection means 84 and meandering correction means 85. The meandering detection means 84 is provided on the left and right side plates 37 and 38 in order to detect a rightward displacement and a leftward displacement of the water absorption belt 31, respectively.

FIG. 7 is a perspective view of meandering detection means 84 provided on the right side plate 38. The meandering detection means 84 on the right side shown in FIG. 7 detects the displacement of the water absorbing belt 31 to the right. The meandering detection means 84 provided on the left side plate 37 for detecting the displacement of the water absorbing belt 31 to the left has the same configuration as the right meandering detection means 84. As shown in FIG. 2, the meandering detection means 84 is installed inside the water absorbing belt 31 that runs around.

As shown in FIG. 7, the meandering detecting means 84 includes a swing member 87 that swings about the swing shaft 87c. The swing member 87 is L-shaped when viewed from the rear side by a contact portion 87a extending in the vertical direction and a protrusion portion 87b extending in the horizontal direction and projecting outward from the window portion 88 formed on the right side plate 38. A swing shaft 87c is formed at the connecting portion between the contact portion 87a and the protruding portion 87b.

When the right edge of the water-absorbing belt 31 traveling on the lower side is displaced to the right, the right edge of the water-absorbing belt 31 first comes into contact with the lower part of the contact part 87a, and then the lower part of the contact part 87a is moved. Try to push it further to the right. As a result, as shown by an arrow in FIG. 7, the contact portion 87a swings upward about the swing shaft 87c, and the projecting portion 87b in the horizontal posture swings upward. The tip moves upward.

A support plate 86 protrudes outward from the right side plate 38, and a pair of upper and lower sensors are fixed to the support plate 86. The upper and lower sensors are provided in alignment with the vertical swing range of the tip of the protrusion 87b. The lower sensor is a meandering detection sensor 89 that detects a positional shift, and the upper sensor is an emergency stop sensor 90. When the position of the water absorbing belt 31 is in the normal position and the edge of the water absorbing belt 31 is not in contact with the contact portion 87a, the lower meandering detection sensor 89 is shielded by the tip of the protruding portion 87b. It becomes. When the position of the water absorbing belt 31 is shifted to the right side, the tip end portion of the protruding portion 87b moves upward, and the lower meandering detection sensor 89 conducts light. The upper emergency stop sensor 90 is shielded from light by the tip of the protruding portion 87b only when a significant positional shift is achieved, but is normally light-transmitting.

FIG. 8 is a view of the meandering correction unit 85 as viewed from the left side, and FIG. 9 is a perspective view of the meandering correction unit 85. The meandering correction means 85 includes a meandering correction roller 92 and a roller angle adjustment unit 96. As shown in FIG. 2, the meandering correction roller 92 is installed inside the circulating water absorbing belt 31, and the outer peripheral surface of the meandering correction roller 92 is brought into rolling contact with the lower surface of the water absorbing belt 31 that runs on the upper side. .

The roller angle adjusting unit 96 shown in FIG. 9 is for inclining the meandering correction roller 92 with respect to the width direction orthogonal to the traveling direction of the water absorbing belt 31, and includes a pair of left and right meandering correction roller shaft support members 103a and 103b. And a meandering correction drive unit 95 that moves the left meandering correction roller shaft support member 103a with respect to the right meandering correction roller shaft support member 103b along the running direction of the water absorption belt.

The meandering correction roller shaft supporting members 103a and 103b rotatably support the meandering correction roller 92. In this embodiment, the pair of left and right side plate members 97a and 97b of the roller support carriage 93 on which the meandering correction roller 92 is mounted. It is formed as. The roller support carriage 93 includes side plate members 97 a and 99 b, a bottom plate member 98, a rotating wheel 99, and a cover 101. The side plate member 97 pivotally supports the rotation shaft 92a of the meandering correction roller 92 at the position where the window portion 91 is formed on the left and right side plates 37, 38 of the paper making apparatus S. The bottom plate member 98 connects the lower portions of the side plate members 97a and 97b. Two rotating wheels 99 are provided on each of the left and right edges of the bottom plate member 98. The cover 101 guides the rotating wheel 99.

The meandering correction drive unit 95 includes a base 94, a meandering correction motor 107, a drive gear 109, a driven gear 110, and a crank arm 114. The base 94 is constructed between the left and right side plates 37, 38, and the left and right end edges of the base 94 are fixed to the left and right side plates 37, 38, respectively. The rotating wheel 99 of the roller support carriage 93 rotates and moves on the base 94 while being guided by the cover 101. As shown in FIG. 9, the base 94 and the bottom plate member 98 of the roller support carriage 93 are joined by a center pin 102 at the center in the width direction. The bottom plate member 98 is formed with a long hole 104 that is long in the traveling direction of the water absorption belt 31 at a position intermediate between the joining position by the center pin 102 and the left and right end edges of the bottom plate member 98. The direction pin 106 is inserted.

As a result, the roller support carriage 93 can be rotated with respect to the base 94 with the joint position of the center pin 102 as the center of rotation, and the rotatable range of the roller support carriage 93 is within the long hole 104. Corresponds to a range in which the side pin 106 can move. By the rotation of the roller support carriage 93, the meandering correction roller 92 rotates around the center in the width direction. In this way, the meandering correction roller 92 is inclined with respect to the width direction orthogonal to the traveling direction of the water absorbing belt 31.

The meandering correction motor 107, the drive gear 109, the driven gear 110, and the crank arm 114 are all provided outside the left side plate 37. A drive gear 109 is fixed to the rotating shaft 107 a of the meandering correction motor 107, and a driven gear 110 is engaged with the drive gear 109. Further, the rear end portion of the crank arm 114 is pin-joined by a crank pin 113 at one location near the outer peripheral portion of the disk surface 110 a of the driven gear 110. The front end portion of the crank arm 114 is joined to the upper portion of the left side plate member 97 a of the roller support carriage 93 by a pin 115.

Further, the meandering correction device 35 is provided with a rear end position detection sensor 116 and a front end position detection sensor 117 which are fixed to the left side plate 37 and spaced apart by a predetermined amount in front of the driven gear 110. Both sensors 116 and 117 detect the foremost position and the last position when the roller support carriage 93 rotates on the base 94 around the center pin 102 and the left side plate member 97a moves back and forth. Each of the sensors 116 and 117 is constituted by a U-shaped photo iterator that includes a light emitting element and a light receiving element.

On the other hand, a fourth light shielding plate 119 is fixed to the driven gear 110 between the left side plate 37 and rotates along with the rotation of the driven gear 110. The fourth light shielding plate 119 has two notches 119a and 119b formed on the outer peripheral portion.

When the left side plate member 97a is in the foremost position, the notch 119a is positioned at the installation position of the lower front end position detection sensor 117, so that the front end position detection sensor 117 is light-transmitted, and the upper rear end position detection sensor 116 is located. Is shielded by the disk surface of the fourth light shielding plate 119. When the meandering correction motor 107 is driven and the driven gear 110 rotates clockwise W from the state in which the left side plate member 97a is in the foremost position, the fourth light shielding plate 119 also rotates clockwise W, and both sensors 116 and 117 are shielded from light by the disk surface.

When the left side plate member 97a comes to the center position in the forward / backward movable range, the state shown in FIG. 8 is reached, and the notch 119a is located in the rear end position detection sensor 116, and the notch 119b is located in the front end position detection sensor 117. Both sensors 116 and 117 are light-transmissive. Further, when the meandering correction motor 107 is driven to rotate the driven gear 110 further in the clockwise direction W, and the driven gear 110 is also rotated in the clockwise direction W, when the fourth light shielding plate 119 rotates in the clockwise direction W, both sensors 116 are rotated. When both the left side plate member 97a comes to the last position after both of 117 are shielded from light, the notch 119b is positioned in the rear end position detection sensor 116 and light is transmitted, and the front end position detection sensor 117 is the fourth light shielding plate. The 119 disk surface provides light shielding.

As shown in FIG. 2, the dewatering roller pair 120 is installed at a contact portion between the water absorption belt 31 and the drying belt 16. The dewatering roller pair 120 holds the water absorption belt 31 and the drying belt 16 in the front and back direction, and transfers the wet paper from the water absorption belt 31 to the drying belt 16 while pressing and dehydrating the wet paper between both belts. is there. The pair of dewatering rollers 120 is a first dewatering roller 121 installed inside the water absorbing belt 31 and a second dewatering roller 122 installed inside the drying belt 16 and at a position opposite to the first dewatering roller 121. It consists of.

The second dehydrating roller 122 is connected to a driving unit (not shown), and the second dehydrating roller 122 is rotationally driven by the driving of the driving unit. The rotation of the second dewatering roller 122 causes the water absorbing belt 31 and the drying belt 16 to travel, and the first dewatering roller 121 that is in rolling contact with the second dewatering roller 122 through the belts 31, 16 is driven to rotate. .

The water supply unit 40 is for supplying water such as tap water to the water absorption belt 31. When the water absorbing belt 31 is in a dry state, water is supplied from the water supply unit 40 to the water absorbing belt 31 to expand the water absorbing belt 31, and further, the tension of the water absorbing belt 31 is adjusted.

The drying unit 15 includes a drying belt 16, a sandwiching belt 127, a drying roller 125, and a plurality of rollers 124. The drying belt 16 is stretched between the drying roller 125 and the plurality of rollers 124. The sandwiching belt 127 travels with the wet web sandwiched between the drying belt 16 at a predetermined location including a range wound around the drying roller 125. The material of the drying belt 16 and the sandwiching belt is not particularly limited, and is, for example, cloth, heat resistant resin, metal, or the like.

The drying unit 15 includes a drying belt meandering correction device 17 for correcting the meandering of the drying belt 16 and a sandwiching belt meandering correction device 128 for correcting the meandering of the sandwiching belt 127. Each of the drying belt meandering correction device 17 and the sandwiching belt meandering correction device 128 has the same configuration as that of the meandering correction device 35 provided in the dewatering unit 14, and each of the drying belt meandering detection means 17a and the drying belt meandering device. A correcting means 17b, a sandwiching belt meandering detecting means 128a, and a sandwiching belt meandering correcting means 128b are provided.

The drying roller 125 includes a heater (not shown) inside and a temperature sensor (not shown) that measures the temperature of the surface of the drying roller 125.

(Finish)
The finishing unit 4 shown in FIG. 1 includes a plurality of press rollers (not shown) for increasing the flatness of the paper and a cutting blade (not shown) for cutting the paper into a predetermined sheet size.

(Function)
The operation of the paper making apparatus 100 according to the present embodiment will be described below. First, a pulp suspension is manufactured by stirring a predetermined amount of used paper 10 together with a predetermined amount of water in the recycled pulp manufacturing unit 1 for a predetermined time. Next, the obtained pulp suspension is sent to the deinking section 2, and deinking processing is performed to obtain a pulp suspension after deinking. The pulp suspension after deinking is hydrated in the deinking section 2 or in the middle of the distribution path from the deinking section 2 to the papermaking section 3 to prepare a predetermined pulp concentration suitable for papermaking, and the papermaking section 3 To the head box 12.

During the production of the pulp suspension in the regenerated pulp production unit 1 and the deinking process in the deinking unit 2, the wet paper dewatering device D in the paper making unit 3 simultaneously performs the water supply unit 40. Thus, moisture is supplied to the water-absorbing belt 31 in a dry state, and the water-absorbing belt 31 is allowed to absorb moisture and expand. As described above, it is formed in the wet paper web forming process after the deinking process that the water absorbing belt 31 is preliminarily containing moisture during the manufacturing of the pulp suspension and the deinking process. This is because when the wet paper is transferred from the paper making wire 23 to the water absorbing belt 31, it is necessary that the water absorbing belt 31 sufficiently contains moisture. It is very difficult to transfer wet paper from the paper making wire 23 to the water absorbent belt 31 while the water absorbent belt 31 is in a dry state. However, if the water absorbent belt 31 contains moisture, the wet paper can be easily used. Can be transferred.

Moreover, even if the water absorption belt 31 is in a dry state, it is considered that wet paper can be transferred by providing a large facility such as a suction device. However, in the present embodiment, the wet paper can be transferred without providing a suction device or the like by preliminarily containing water in the water absorbing belt 31 as described above. Therefore, the manufacturing cost can be greatly reduced, and the occupied area can be reduced.

In supplying water from the water supply unit 40, the control unit 8 first drives the tension adjustment drive unit 28 to apply tension to the water absorbing belt 31 in a state in which the tension is released. That is, the tension adjusting motor 49 shown in FIG. 3 is driven, the screw shaft 45 is rotated via the drive gear 51 and the driven gear 52, the locking member 44 is moved rearward, and the tension spring 46 is moved to the movable roller shaft support member. 47 is urged backwards. As a result, the movable roller 33 is pulled backward with a predetermined force, and tension is applied to the water absorbing belt 31.

In a state where the tension of the water absorption belt 31 is released, the third light shielding plate 81 is positioned in front of the tension release sensor 70, and the tension release sensor 70 is light-transmitted. In this state, by applying tension to the water absorbing belt 31, the third light shielding plate 81 moves rearward along with the movement of the locking member 44, and the rear end 81 a of the third light shielding plate 81 is connected to the tension release sensor 70. By reaching the installation position, the tension release sensor 70 is shielded from light. Accordingly, the tension release sensor 70 detects that the tension is applied to the water absorption belt 31 and transmits the detected tension to the control unit 8.

When the tension applied to the water absorbing belt 31 by driving the tension adjusting motor 49 reaches a predetermined amount, the slack detection sensor 69 detects that a predetermined amount of tension has been applied to the water absorbing belt 31, and responds accordingly. Then, the control unit 8 stops driving the tension adjustment motor 49. In the slack detection sensor 69, the tension of the movable roller shaft support member 47 is applied to the tension spring 46 because the tension of the water absorbing belt 31 is large even though the locking member 44 is retracted by the drive of the tension adjusting motor 49. As a result, the distance between the locking member 44 and the movable roller shaft support member 47 is gradually increased. As a result, the rear end of the second light shielding plate 76 is detached from the slack detection sensor 69 and is slack. It is detected when the detection sensor 69 transmits light.

In this manner, moisture is supplied from the water supply unit 40 to the water absorbing belt 31 in a dry state in a state where a predetermined amount of tension is applied to the water absorbing belt 31. Moreover, the drive part of the 2nd dehydration roller 122 is driven, and the water absorption belt 31 is made to run around. Thereby, the water | moisture content supplied from the water supply part 40 is absorbed in the location where the water absorption belt 31 differs sequentially. Then, the water absorbing belt 31 absorbs moisture and expands to gradually increase the circumferential length, and the tension of the water absorbing belt 31 gradually decreases.

Due to the decrease in the tension of the water absorbing belt 31, the force to hold the movable roller 33 at a predetermined position is weakened, and the movable roller shaft support member 47 is attracted rearward by the urging force of the tension spring 46, and the movable roller shaft support portion The distance between the material 47 and the locking member 44 is shortened. Then, the erection member 75 moves rearward relative to the locking member 75, and the slackness detection sensor 69 that has passed light is blocked by the second light blocking plate 76. Thereby, the slack detection sensor 70 detects that the tension of the water absorbing belt 31 has decreased. In response to this, the control unit 8 operates the tension adjustment motor 49 to apply a predetermined amount of tension to the water absorption belt 31.

The tension adjusting motor 49 is repeatedly actuated and stopped according to the detection of the slack detecting sensor 69, and a predetermined amount of tension is applied to the water absorbing belt 31, and the water absorbing belt 31 is sufficiently moistened. When the maximum tension detection sensor 68 detects that the first light shielding plate has shielded the light, the control unit 8 determines that the maximum tension is applied to the water absorbing belt 31 and stops the tension adjusting motor 49. End the tension adjustment.

In this way, after sufficiently containing water in the water absorption belt 31, the pulp suspension is sent from the deinking unit 2 to the head box 12 shown in FIG. It flows out from the outflow part 19 onto the papermaking wire 23. After the liquid suspension in the pulp suspension supplied onto the papermaking wire 23 passes through the mesh of the papermaking wire 23 and is guided to the lower water receiving portion 27 by the vertical plate 26 and received by the water receiving portion 27. The white water tank 29 is accommodated. The white water in the white water tank 29 is sent to the recycled pulp manufacturing unit 1, the deinking unit 2, etc. and reused. The recycled pulp remaining on the papermaking wire 23 forms a wet paper which is a fiber layer containing a relatively large amount of moisture.

When the wet paper on the paper making wire 23 reaches the contact portion 30 with the water absorbing belt 31, it is transferred from the paper making wire 23 to the water absorbing belt 31. The water absorption belt 31 travels while carrying wet paper in a wet state, thereby absorbing water contained in the wet paper to the water absorption belt 31 side and dehydrating. Further, the wet paper web is sandwiched and pressed by the dewatering roller pair 120 at the position where the dewatering roller pair 120 is installed, dehydrated, and transferred to the drying belt 16.

When the meandering detecting means 84 detects meandering of the water absorbing belt 31 during the conveyance of the wet paper by the water absorbing belt 31, the control unit 8 corrects the meandering of the water absorbing belt 31 by the meandering correcting means 85. At this time, when the right meandering detecting means 84 detects the displacement of the water absorbing belt 31 to the right side, the control unit 8 rotates the meandering correction motor 107 counterclockwise in FIG. As a result, the drive gear 109 rotates counterclockwise, and the driven gear 110 rotates clockwise W. Then, the rear end of the crank arm 114 moves clockwise W while drawing an arc-shaped locus along the outer periphery from the center position of the upper half circle of the driven gear 110, and the front end of the crank arm 114 is joined. The left side plate member 97a moves backward on the base 94 from the central reference position.

Due to the rearward movement of the left side plate member 97a, the roller support carriage 93 rotates counterclockwise in plan view with the center pin 102 as the rotation center, and the meandering correction roller with respect to the width direction perpendicular to the traveling direction of the water absorbing belt 31 The right end of 92 is in contact with the water absorbing belt 31 with the left end inclined forward and the left end inclined rearward, so that the displacement of the water absorbing belt 31 to the right with respect to the rollers 32a, 32b, 32c is corrected, and the rollers 32a, 32b, 32c are corrected. Properly drive in the center of the car.

Conversely, when the left meandering detecting means 84 detects the displacement of the water absorbing belt 31 to the left side, the control unit 8 rotates the meandering correction motor 107 clockwise in FIG. 8 and turns the drive gear 109 clockwise. Rotates and rotates the driven gear 110 counterclockwise U. Then, the rear end portion of the crank arm 114 is moved counterclockwise U while drawing an arc-shaped trajectory along the outer periphery from the center position of the upper half circle of the driven gear 110, pushing the crank arm 114 forward, The side plate member 97a is moved forward from the central reference position. In this way, the roller support carriage 93 is rotated clockwise in plan view with the center pin 102 as the center of rotation.

By rotation of the roller support carriage 93, the meandering correction roller 92 causes the water absorption belt 31 to travel in a state where the right end is inclined backward and the left end is inclined forward from the width direction orthogonal to the traveling direction of the water absorption belt 31. Thus, the displacement of the water absorption belt 31 to the left with respect to the rollers 32a, 32b, and 32c is corrected so that the central portion of the rollers 32a, 32b, and 32c travels appropriately.

As described above, the meandering correction device 35 includes a meandering correction roller 92 whose outer peripheral surface is in rolling contact with the water absorbing belt 31 and a roller angle adjusting unit 96 for inclining the meandering correction roller 92 with respect to the width direction perpendicular to the traveling direction of the water absorbing belt 31. Therefore, the meandering of the water absorbing bell 31 can be easily corrected by adjusting the angle of the meandering correction roller 92 by the roller angle adjusting unit 96.

The roller angle adjustment unit 96 includes a pair of left and right side plate members 97a and 97b as left and right side plate members 97a and 97b, and a pair of left and right side plate members 97a and 97b. Since one side plate member 97a is provided with a meandering correction drive unit 95 that moves the side plate member 97a with respect to the other side plate member 97b along the traveling direction of the water absorption belt 31, the water absorption belt 31 can be easily obtained without damaging the water absorption belt 31. Can be corrected.

During the dewatering of the wet paper, basically, the tension adjustment motor 49 is driven and the tension adjustment is not performed, and the position of the locking member 44 is moved to the last position where the maximum tension is applied to the water absorbing belt 31. I won't let you. As for the slight expansion and contraction of the water absorbing belt 31 during the dewatering of the wet paper, the predetermined tension can be maintained without loosening the water absorbing belt 31 by moving the position of the movable roller 33 by the urging force of the tension spring 46. it can.

The wet paper transferred from the water absorbing belt 31 to the drying belt 16 is sandwiched between the sandwiching belt 127 and applied to the drying roller 125 heated by a heater and maintained at a predetermined temperature via the drying belt 16. Drying is performed by contact, and recycled paper 7 before finishing is obtained.

When the drying belt meandering detection means 17a detects that the drying belt 16 meanders while the drying belt 16 is running, the control unit 8 performs the meandering correction means for the drying belt, similarly to the meandering correction of the water absorbing belt 31 described above. The meandering correction of the drying belt 16 is performed by 17b. When the sandwiching belt meandering detecting means 128a detects that the sandwiching belt 128 meanders, the control unit 8 similarly performs meandering correction of the sandwiching belt 16 by the sandwiching belt meandering correcting means 128b.

The finished recycled paper 7 obtained in the drying unit 15 is fed to the finishing section 4 and pressed with a plurality of press rollers to increase the flatness of the paper, and then cut into a predetermined sheet size with a cutting blade. 7 is completed.

The end material of the recycled paper 7 cut by the cutting blade is returned to the recycled pulp manufacturing unit 1 as shown in FIG. 1 and used again for manufacturing the recycled paper 7.

After the operation of the used paper recycling apparatus 100, the tension applied to the water absorption belt 31 is released. When the water absorbing belt 31 contains moisture, the tension applied is left as it is for a long time, so that the water absorbing belt 31 contracts due to drying of the water absorbing belt 31 and excessively moves the movable roller 33 and other members. There is a risk of damaging the apparatus, for example, by bending the rotating shaft 66 of the movable roller 33. Further, the circumferential length of the water absorbing belt 31 at the start of the next operation may vary, and it may be difficult to adjust the tension.

In order to release the tension of the water absorbing belt 31, the tension adjusting motor 49 shown in FIG. 3 is rotated in the opposite direction to that when the tension is applied, and the screw shaft 45 is rotated in the reverse direction to rotate the locking member 44 and the movable roller shaft support portion. By moving the material 47 forward, the movable roller 33 is advanced. Then, the movable roller shaft support member 47 is moved to a position where the urging force of the tension spring 46 is no longer applied. When the rear end 81a of the third light shielding plate 81 is removed from the tension release sensor 70 and light is transmitted, the controller 8 Determines that the tension applied to the water absorption belt 31 has been released, and stops the tension adjustment motor 49.

As described above, the tension adjusting device 34 moves the movable roller 33 rearward by driving the tension adjusting drive unit 42 and moving the movable roller shaft support member 47 via the locking member 44 and the tension spring 46. A constant tension can be applied to the water absorbing belt 31. Therefore, since the driving force of the tension adjusting drive unit 42 is applied to the water absorbing belt 31 directly through the biasing force of the tension spring, the water absorbing belt 31 is hardly damaged and durability can be improved. . Further, when the tension of the water absorbing belt 31 fluctuates, the movable roller 33 moves while being urged by the tension spring 46, so that the rollers 32a, 23b, and 32c can be used even while the tension adjusting drive unit 42 is stopped. The traveling length of the water absorbing belt 31 that travels around the belt can be varied according to the expansion and contraction of the water absorbing belt 31, and the increase or decrease in the tension of the water absorbing belt 31 can be reduced. Therefore, control for tension adjustment by the control unit 8 can be simplified.

As a result, since the water absorbing belt 31 traveled slackly, the water absorbing belt 31 is wrinkled when it is sandwiched between the dewatering roller pair 120, and the wrinkle is formed in the wet paper dewatering process. The trouble of lowering the formation of the paper 7 is not caused.

The tension adjustment drive unit 42 includes a tension adjustment motor 49 and a screw shaft 45 that is rotated by driving the tension adjustment motor 49, and a nut to which the screw shaft 45 is screwed onto the locking member 44. Since the portion 60 is provided, it is possible to easily apply a certain tension to the water absorbing belt 31 with a simple structure.

The wet paper web dewatering device D performs meandering by the tension adjusting device 34 that adjusts the tension of the water absorbing belt 31 using the tension spring 46 and the meandering correction roller 92 that contacts the water absorbing belt 31 being inclined from the width direction. Since the meandering correction device 35 for correction is provided, the meandering correction device 35 can correct meandering without damaging the water absorbing belt 31 while keeping the tension of the water absorbing belt 31 constant by the tension adjusting device 34, and the water absorbing belt. The wet paper web can be dehydrated properly by applying an appropriate force without applying an excessive force that causes wrinkles and the like on the 31.

Furthermore, the used paper recycling apparatus 100 includes a recycled pulp production unit 1 that disaggregates used paper to produce a pulp suspension, and a wet paper that forms a wet paper by making paper from the pulp suspension produced by the recycled pulp production unit 1. Paper forming unit 11, wet paper dewatering device D for dewatering the wet paper formed by wet paper forming unit 11, and drying for producing recycled paper by drying the wet paper dehydrated by wet paper dewatering device D Therefore, the wet paper web formed by the wet paper web forming unit 11 can be efficiently and appropriately dehydrated by the wet paper web dewatering device D to obtain good quality recycled paper.

In the above embodiment, the deinking unit 2 is provided in the used paper recycling processing apparatus 100, but the deinking unit 2 may be omitted. The tension adjustment drive unit 42 includes a tension adjustment motor 49 and a screw shaft. However, the tension adjustment drive unit 42 according to the present invention is not limited to this, and may be a crank mechanism or a rack and pinion. It may be configured. Further, the roller angle adjustment unit 96 includes a pair of left and right meandering correction roller shaft support members 103 and a meandering correction drive unit 95 of the crank mechanism. However, the present invention is not limited to this. Trapezoidal screws may be used, and racks and pinions may be used.

The meandering correction drive unit 95 moves the left meandering correction roller shaft support member 103a with respect to the right meandering correction roller shaft support member 103b along the running direction of the water absorption belt. The right meander correction roller shaft support member may be moved along the running direction of the water absorption belt with respect to the left meander correction roller shaft support member. In this case, the meander correction motor, the drive gear, the driven gear and the crank arm of the meander correction drive unit 95 are provided outside the right side plate, and the front end of the crank arm is pinned to the right meander correction roller shaft support member. Join. Furthermore, the meandering correction drive unit 95 may be provided on both the left and right side plates, and the correction roller may be inclined by setting the direction of movement of the meandering correction roller shaft support member in the opposite direction.

D Wet paper dewatering device 1 Recycled pulp manufacturing unit 11 Wet paper forming unit 15 Drying unit 31 Water absorption belts 32a, 32b, 32c Roller 34 Tension adjusting device 35 Meandering correction device 36 Moving means 42 Tension adjusting drive unit 45 Rod screw 44 Stop member 46 Tension spring 47 Movable roller shaft support member 49 Tension adjustment motor 60 Nut portion 66 Rotating shaft 92 Meander correction roller 95 Meander correction drive portion 96 Roller angle adjustment portion 100 Used paper recycling processor 103, 103a, 103b Meander correction roller Shaft support member 120 Dewatering roller pair

Claims (6)

An endless water absorption belt that conveys wet paper in a wet state;
A pair of dewatering rollers that sandwich the water absorption belt and another belt, press the wet paper between the belts through the water absorption belt and the other belt, and dehydrate.
A wet paper web dewatering device comprising a tension adjusting device for adjusting the tension of the water absorbing belt,
The tension adjusting device is configured such that at least one of the plurality of rollers over which the water absorption belt is stretched can be moved by the moving means,
A moving means rotatably supports a rotating shaft of a movable roller, a tension roller having one end locked on the movable roller shaft, and a second end of the tension spring. An apparatus for dewatering a wet paper, comprising: a locking member to be moved; and a tension adjusting drive unit that moves the locking member to a predetermined position. The tension adjustment drive unit includes a tension adjustment motor and a screw shaft that is rotated by driving the tension adjustment motor.
The wet paper web dewatering device according to claim 1, wherein the locking member is provided with a nut portion into which the screw shaft is screwed. An endless water absorption belt that conveys wet paper in a wet state;
A pair of dewatering rollers that sandwich the water absorption belt and another belt, press the wet paper between the belts through the water absorption belt and the other belt, and dehydrate.
A wet paper dewatering device having a meandering correction device for correcting meandering of a water absorbing belt,
The meandering correction device includes a meandering correction roller whose outer peripheral surface is in rolling contact with the water absorbing belt,
A wet paper web dewatering device comprising: a roller angle adjusting unit that tilts a meandering correction roller with respect to a width direction orthogonal to a running direction of a water absorbing belt. The roller angle adjustment unit includes a pair of left and right meandering correction roller shafts that rotatably support the meandering correction roller, and
A meandering correction drive unit that moves one of the meandering correction roller shaft support members of the left and right meandering correction roller shaft members with respect to the other meandering correction roller shaft support member along the running direction of the water absorption belt. The wet paper web dewatering device according to claim 3. A wet paper web dewatering device comprising the tension adjusting device according to claim 1 or 2 and the meandering correction device according to claim 3 or 4. Regenerated pulp manufacturing department that disaggregates waste paper to produce pulp suspension;
A wet paper web forming section for paper making a pulp suspension produced in the recycled pulp production department to form a wet paper;
The wet paper web dewatering device according to any one of claims 1 to 5, wherein the wet paper web formed by the wet paper web forming unit is dehydrated.
A used paper recycling apparatus comprising: a drying unit that dries wet paper dehydrated by a wet paper dewatering device to produce recycled paper.

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