JP2014124586A - Paper processing device and paper processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper processing device and a paper processing method capable of easily adjusting the concentration of a dissolving liquid so that a variation in a thickness of a generated dissolution object block falls within a constant range.SOLUTION: The paper processing device on the present invention inputs waste paper in a dissolver for storing a solution, and carries the dissolving liquid of the waste paper fibrillated in a fiber shape to a compression part by a pump, and press-molds a dissolution object in the dissolving liquid in a block shape by the compression part, and recovers the dissolution object block generated by press-molding. When the thickness of the dissolution object block is smaller than a predetermined value, the manufacture number of dissolution object block is changed to a smaller value than a basic setting manufacture number, and when determining that the thickness is the predetermined value or more, the manufacture number of dissolution object block is set to the basic setting manufacture number.

Description

  The present invention relates to a paper processing apparatus and a paper processing method for processing a huge amount of waste paper generated in a government office, an office or the like in a government office or an office and collecting it as a melt block.

  In daily operations such as government offices and offices, a huge amount of unnecessary documents (waste paper) is generated every day. Some documents cannot be discarded as they are from the viewpoint of confidentiality, and are currently incinerated or processed by a document cutting machine.

  However, it is difficult to actually perform the treatment by incineration at least in the city center from the viewpoints of safety, smoke treatment, and the like. In addition, although the processing by the document cutter is effective from the viewpoint of confidentiality, the waste paper is shredded in a dry state. It becomes difficult to effectively use it as a raw material for paper. Furthermore, storage and transportation of shredded paper pieces, which are waste, are not easy depending on the quantity.

  Therefore, the waste paper put into the defibrating tank is defibrated in the swirling flow generated by the rotation of the stirrer in the surfactant solution to obtain suspended water of the defibrated material, and then the defibrated material suspension. A waste paper processing apparatus has been developed in which muddy water is introduced into a pressure vessel, compressed by a cylinder, drained, and formed into a defibrated block of a predetermined size. By forming the defibrated material block, it becomes easy to store and transport the waste after treatment, and the waste after treatment is suitable as a raw material for recycled paper. (See Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 05-200377 Japanese Patent No. 3295865

  However, when the defibrated material block (dissolved material block) is generated by press molding, the size of the defibrated material block varies depending on the concentration of the defibrated material suspension water (dissolved solution). That is, when the concentration of the defibrated material suspension water is low, the thickness of the defibrated material block to be generated becomes small, and when the concentration of the defibrated material suspension water is high, the thickness of the defibrated material block to be generated is reduced. Will grow. Since it is easier to reuse the variation in the thickness of the generated defibrated material block within a certain range, it is preferable to adjust the concentration of the defibrated material suspension water within the certain range. However, the conventional waste paper processing apparatus has a problem that it is difficult to adjust the concentration of the defibrated material suspension water within a certain range.

  For example, conventionally, the increase / decrease of the load current of the motor that rotates the stirring blades is detected, and when the load current becomes smaller than a predetermined value, the waste paper is put into the dissolution tank, thereby reducing the concentration of the defibrated material suspension water. It was adjusted within a certain range. However, in this method, the concentration of the defibrated material suspension water does not increase immediately after the waste paper is put into the dissolution tank, and there is a certain time lag. Therefore, skilled workers are required to adjust the concentration of defibrated material suspension water within a certain range.

  The present invention has been made in view of such circumstances, and a paper processing apparatus capable of easily adjusting the concentration of a dissolved solution so that the variation in thickness of the generated dissolved block falls within a certain range. An object is to provide a paper processing method.

  In order to achieve the above object, a paper processing apparatus according to a first aspect of the present invention introduces waste paper into a dissolution tank in which a solution is stored, and defibrates the input waste paper into a fiber shape in the dissolution tank. The waste paper lysate defibrated is transported to a compression unit by a pump, and the transported solution is compressed by the compression unit, and the melt in the solution is press-molded into a block shape. A paper processing apparatus for collecting a melt block generated by molding, wherein a block thickness acquisition means for acquiring the thickness of the melt block, and a certain amount of waste that is input at a time according to the acquired thickness And a production number changing means for changing the production number of the melt block for the paper.

  Further, in the paper processing apparatus according to the second invention, in the first invention, the production number changing means determines whether or not the acquired thickness is smaller than a predetermined value, and determines that the thickness is smaller than the predetermined value. If the production number of the melt block is changed to a value smaller than the basic production number, and the thickness is determined to be greater than or equal to a predetermined value, the production number of the dissolution block is basically set. It is characterized by setting to.

  In the paper processing apparatus according to a third aspect of the present invention, in the first aspect, the production number changing means calculates an average value of the thickness of the melt block generated by introducing a certain amount of waste paper. It is determined whether the average value is smaller than a predetermined value, and when the average value is determined to be smaller than the predetermined value, the production number of the melt block is changed to a value smaller than the basic production number, When it is determined that the average value is equal to or greater than a predetermined value, the number of manufactured melt blocks is set to a basic set number.

  Next, in order to achieve the above object, a paper processing method according to a fourth aspect of the present invention is to put waste paper into a dissolution tank in which a solution is stored, and disassemble the input waste paper into a fiber shape in the dissolution tank. Then, the solution of waste paper that has been fibrillated is transported to the compression unit by a pump, and the transported solution is compressed by the compression unit, and the melt in the solution is pressed into blocks. And a method of recovering a melt block generated by press molding, wherein the thickness of the melt block is obtained, and according to the obtained thickness, a certain amount of waste paper is charged at a time. The production number of the melt block is changed.

  In the paper processing method according to the fifth invention, in the fourth invention, it is determined whether or not the acquired thickness is smaller than a predetermined value, and when it is determined that the thickness is smaller than the predetermined value, the number of manufactured melt blocks Is changed to a value smaller than the basic number of production, and when the thickness is determined to be equal to or greater than a predetermined value, the production number of the melt block is set to the basic production number. To do.

  The paper processing method according to a sixth aspect of the present invention is the paper processing method according to the fourth aspect, wherein an average value of the thickness of the melt block generated by introducing a certain amount of waste paper is calculated, and the calculated average value is greater than a predetermined value. If it is determined whether the average value is smaller than a predetermined value, the number of manufactured blocks of the melt is changed to a value smaller than the basic number of manufacturing, and the average value is equal to or greater than the predetermined value. If it is determined that there is, the production number of the lysate block is set to a production number that is basically set.

  In the 1st invention and the 4th invention, waste paper is thrown into the dissolution tank where the solution was stored, and the input waste paper is fibrillated in the dissolution tank. Dissolved waste paper solution that has been fibrillated is conveyed to the compression unit by a pump, and the conveyed solution is compressed by the compression unit, and the melted solution in the solution is press-molded into blocks. The molded lysate block is collected. The thickness of the melt block is acquired, and the number of melt blocks produced for a certain amount of waste paper that is input at a time is changed according to the acquired thickness. Since the thickness of the melt block to be generated varies depending on the concentration of the waste paper melt that has been fibrillated, the generated melt block has been generated in order to keep the thickness of the melt block within a certain range. Depending on the thickness of the melt block, the number of melt blocks produced for a certain amount of waste paper charged at one time is changed. Thereby, it is possible to adjust the concentration of the dissolved solution of the waste paper fibrillated, for example, to increase the concentration of the dissolved solution that has been lowered by continuously generating a dissolved block, It becomes possible to return the thickness of the melt block that has become thinner due to the decrease in concentration to the original thickness.

  In 2nd invention and 5th invention, when the thickness of a melt | dissolution block is smaller than predetermined value, the production number of a melt block is changed into a value smaller than the production number which is set fundamentally, and thickness is more than predetermined value In this case, the production number of the melt block is set to the production number which is basically set. As a result, a melt block is generated with the number of melt blocks produced for a certain amount of waste paper, which is basically set, and when the thickness becomes smaller than a predetermined value, the number of production is reduced to be fibrillated. It is possible to increase the concentration of the waste paper solution and return the thickness of the dissolved block that has become thinner due to the decrease in concentration to the original thickness.

  In the third invention and the sixth invention, the average value of the thickness of the melt block generated by introducing a certain amount of waste paper is calculated, and when the calculated average value is smaller than the predetermined value, the number of the melt blocks manufactured Is changed to a value smaller than the basic production number, and when the average value is equal to or greater than a predetermined value, the production number of the melt block is set to the basic production number. As a result, a melt block is generated with the number of melt blocks produced for a certain amount of waste paper, which is basically set, and when the average thickness is less than the predetermined value, the number of production is reduced to solve the fiber block. It is possible to increase the concentration of the dissolved waste paper waste and return the thickness of the melt block that has become thinner due to the decrease in the concentration to the original thickness.

  According to the present invention, the thickness of the dissolved block to be generated varies depending on the concentration of the dissolved solution of the waste paper fibrillated, so that the thickness of the recovered dissolved block falls within a certain range. In order to accommodate this, the number of melt blocks produced for a certain amount of waste paper to be charged at one time is changed according to the thickness of the melt block produced. Thereby, it is possible to adjust the concentration of the dissolved solution of the waste paper fibrillated, for example, to increase the concentration of the dissolved solution that has been lowered by continuously generating a dissolved block, It becomes possible to return the thickness of the melt block that has become thinner due to the decrease in concentration to the original thickness.

It is a schematic diagram which shows schematic structure of the paper processing apparatus which concerns on Embodiment 1 of this invention. It is a schematic diagram explaining operation | movement of the waste paper input part of the paper processing apparatus which concerns on Embodiment 1 of this invention. It is a schematic diagram explaining operation | movement of the waste paper input part of the paper processing apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the control part of the paper processing apparatus which concerns on Embodiment 1 of this invention. It is the top view and front view which show the structure of the stirring means containing the stirring blade of the paper processing apparatus which concerns on Embodiment 1 of this invention. It is a schematic diagram which shows the structure of the compression part of the paper processing apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the density adjustment process of CPU of the control part of the paper processing apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the procedure of the density adjustment process of CPU of the control part of the paper processing apparatus which concerns on Embodiment 2 of this invention.

  Hereinafter, a paper processing apparatus according to an embodiment of the present invention will be described with reference to the drawings illustrating the embodiment. In the following embodiments, constituent elements having the same function are denoted by the same reference numerals, and detailed description is not necessarily given.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a schematic configuration of a paper processing apparatus according to Embodiment 1 of the present invention. As shown in FIG. 1, the paper processing apparatus 30 according to the first embodiment includes a waste paper input unit 40, a melting unit 50, a compression unit 60, and a control unit 80.

  The waste paper input unit 40 is disposed above the dissolution tank 51 of the dissolution unit 50, and includes a first waste paper base 42 on which the waste paper 41 to be processed is placed, and a lower part of the first waste paper base 42. And a second waste paper table 44 disposed in the upper and lower layers. The first waste paper tray 42 can move in the left-right direction in FIG. 1, and the waste paper 41 can be fed into the second waste paper tray 44 by a certain amount.

  2 and 3 are schematic diagrams for explaining the operation of the waste paper input unit 40 of the paper processing apparatus 30 according to the first embodiment of the present invention. First, as shown in FIG. 2A, the waste paper 41 is set through an opening located at the upper left of the waste paper input unit 40, and the set waste paper 41 moves in the left-right direction in FIG. It is placed on a first waste paper board (upper stage) 42 that can be used.

  On the side opposite to the side on which the waste paper 41 is set, a comb-like fixing member 43 is fixed to the inner wall of the waste paper input unit 40. When the first waste paper tray 42 moves to the right in FIG. 2, the waste paper 41 placed on the first waste paper tray 42 also moves to the right. When the waste paper 41 comes into contact with the fixing member 43, the movement stops, and only the first waste paper board 42 moves.

  Thereby, as shown in FIG. 2B, the waste paper 41 falls onto the second waste paper base (lower stage) 44. As shown in FIG. 2 (c), when the waste paper 41 is sent to the second waste paper tray 44, that is, the first waste paper tray 42 has moved to a position where it does not intersect with the second waste paper tray 44. At that time, the first waste paper tray 42 starts moving leftward to return to the original position. Then, as shown in FIG. 3A, when the first waste paper tray 42 returns to the original position, the second waste paper tray 44 is sealed by the first waste paper tray 42. The sent waste paper 41 cannot be taken out.

  With such a configuration, it becomes impossible to take out the waste paper 41 before starting the processing. In other words, it is possible to prevent a malicious third party from taking out, misusing, etc., and the information on the discarded waste paper 41 can reduce the chance of the third party seeing it as much as possible. it can.

  The waste paper 41 sent to the second waste paper table 44 is moved by the movement of the comb-like moving member 45 that can move in the left-right direction in FIG. 3 on the second waste paper table 44. 45 is moved in the moving direction. That is, as shown in FIG. 3B, by moving the moving member 45 in the right direction in FIG. 3, the waste paper 41 sent to the second waste paper table 44 is pushed out in the right direction.

  The paper processing apparatus 30 according to the first embodiment is provided with a drop guide 46 for dropping the waste paper 41 into the melting unit 50. The drop guide 46 has an opening that is higher on the opposite side, that is, on the side away from the second waste paper table 44, than on the side wall near the second waste paper table 44. Thereby, the waste paper 41 pushed out by the moving member 45 surely falls into the drop guide 46 and is guided to the dissolution tank 51 (see FIG. 3C).

  The movement of the first waste paper tray 42 and the movement of the moving member 45 are controlled by the control unit 80 of the paper processing apparatus according to the first embodiment. The control unit 80 also controls the operations of the melting unit 50 and the compression unit 60. Details will be described later.

  FIG. 4 is a block diagram showing a configuration of the control unit 80 of the paper processing apparatus according to Embodiment 1 of the present invention. The control unit 80 of the paper processing apparatus according to the first embodiment connects at least a CPU (central processing unit) 81, a memory 82, a storage device 83, an input / output interface 84, a communication interface 85, and the hardware described above. An internal bus 86 is used.

  The CPU 81 is connected to each hardware unit as described above of the control unit 80 via the internal bus 86, controls the operation of each hardware unit described above, and according to a computer program stored in the storage device 83. Perform various software functions. The memory 82 is composed of a volatile memory such as SRAM or SDRAM, and a load module is expanded when the computer program is executed, and stores temporary data generated when the computer program is executed.

  The storage device 83 includes a built-in fixed storage device (hard disk), a ROM, and the like. The computer program stored in the storage device 83 is expanded from the storage device 83 to the memory 82 and executed at the time of execution. The input / output interface 84 is connected to the internal bus 86 and receives, for example, an input of the number of manufactured melt blocks for a certain amount of waste paper 41 that is input at a time. The input device (not shown) connected to the input / output interface 84 may be, for example, a push button that determines the number of steps manufactured or a liquid crystal touch panel.

  The communication interface 85 is connected to the internal bus 86, and can communicate with the waste paper input unit 40, the melting unit 50, the compression unit 60, and the like. Operations of the waste paper input unit 40, the dissolving unit 50, the compression unit 60, and the like are controlled by control signals transmitted and received.

  Returning to FIG. 1, the dissolving unit 50 dissolves the waste paper 41 by rotating the stirring blade 53 by putting the waste paper 41 into the dissolution tank 51 in which the solution 52 is stored. In the first embodiment, it is not necessary to use a sea surface active agent solution or the like as the solution 52. For example, water (normal water) may be used. Specifically, a certain amount of waste paper 41 falling from the drop guide 46 sinks into the water 52 stored in the dissolution tank 51. The water level of the water 52 is measured by the water level sensor 55, and a water level signal is transmitted to the control unit 80 at all times. When the control unit 80 determines that the stored water 52 has decreased, the control unit 80 transmits a water supply instruction to the external water supply pump 57 to supply the reserve water stored in the water supply tank 56 to the water supply hose 58. Water is supplied to the dissolution tank 51 via Since the water supply tank 56 and the water supply pump 57 are provided outside the dissolution tank 51, there is no possibility that the turbid liquid of the waste paper 41 is mixed as in the conventional case, and water (normal water) 52 is used as a solution. In addition, the waste paper 41 can be dissolved, and it is not necessary to use a pump with special specifications for the feed water pump 57.

  The solution of the waste paper 41 that has been stirred by the stirring blade 53 and dissolved in the water 52 without cutting the fibers, that is, the solution of the waste paper 41 that has been fibrillated into a fiber shape is passed through the suction cover 59 to the main pump. (Pump) 71 is sent. The suction cover 59 is a plate having a plurality of holes, and when there is waste paper 41 that is not sufficiently dissolved, waste paper 41 that is not dissolved by the suction cover 59 enters the main pump 71. To avoid. The main pump 71 conveys the dissolved liquid to the compression unit 60 via the pressure feeding hose 72.

  FIG. 5 is a plan view and a front view showing the configuration of the stirring means including the stirring blade 53 of the paper processing device 30 according to the first embodiment of the present invention. As shown in FIG. 5 (b), the stirring means according to the first embodiment is arranged at the upper part of the dissolution tank 51 so that the waste paper 41 is evenly dissolved in the water 52 stored in the dissolution tank 51. A stirring blade 53 for stirring and a stirring motor 54 for rotating the stirring blade 53 are configured. The stirring motor 54 and the stirring blade 53 are connected.

  The stirring blade 53 has a rotating shaft 531 connected to the stirring motor 54, and a plurality of horizontal fins 532 are attached in the middle of the rotating shaft 531. The size of the horizontal fins 532 is not particularly limited, but it is preferable that the surface area of the fins located below is larger. For example, if the fins have the same width, it is preferable to increase the length of the fin located at the lower side. This is to increase the stirring efficiency and make the concentration of the dissolving liquid in the dissolving tank 51 as uniform as possible.

  Further, the rotation of the stirring blade 53 may cause the water flow to collide with the partition wall of the dissolution tank 51 and the undissolved paper piece may bounce back. The horizontal fin 532 also has a function of pushing back the undissolved paper piece that bounces back in the centrifugal force direction, and can prevent the undissolved paper piece from being entangled with the rotating shaft 531 in advance. Agitation is promoted to sufficiently dissolve the paper piece.

  In the first embodiment, as shown in FIG. 5A, the stirring fins 533 provided at the lowermost portion of the stirring blade 53 are four in the cross direction, and the plurality of horizontal fins 532 do not overlap the stirring fins 533. Each is attached to a rotating shaft 531 in each direction. This prevents the undissolved piece of paper from getting entangled with the horizontal fins 532 or the stirring fins 533 as much as possible.

  An elastic fin 534 made of an elastic member such as hard rubber is attached to the stirring fin 533 provided at the lowermost portion of the stirring blade 53 via a plate 535. Specifically, the elastic fin 534 is screwed to the lower part of the stirring fin 533 through the plate 535. Of course, the means for attaching is not particularly limited to screwing, and any means that can fix the elastic fins 534 may be used. By providing the elastic fins 534, when the waste paper 41 is stirred in the dissolution tank 51, the waste paper 41 can be dissolved in the water 52 without cutting the fibers.

  Returning to FIG. 1, the solution of the waste paper 41 that has been stirred by the stirring blade 53 and dissolved in the water 52 in a state where the fibers are not cut is sent to the main pump 71 through the suction cover 59. The waste paper 41 dissolved to the extent that it passes through the plurality of holes of the suction cover 59 does not hinder the operation of the main pump 71. The main pump 71 feeds the solution into the compression unit 60.

  FIG. 6 is a schematic diagram illustrating a configuration of the compression unit 60 of the paper processing device 30 according to the first embodiment of the present invention. As shown in FIG. 6, the compression unit 60 includes a ball screw 63 that moves the compression cylinder 62 forward (moves in the right direction) or moves backward (moves in the left direction) by rotation of the drive motor 61.

  The pressure feeding hose 72 is connected to the injection port 64, and the solution injected from the injection port 64 is stored in the compression chamber 65. When the ball screw 63 is rotated by the rotation of the drive motor 61 and the compression cylinder 62 is advanced, the solution stored in the compression chamber 65 is compressed by the compression cylinder 62, and the dissolved material in the solution is pressed into a block shape. Molded. By collecting the press-formed melt block 70, the processing of the waste paper 41 is completed.

  The thickness of the melt block 70 can be estimated from the arrival position of the compression cylinder 62 to be press-molded. This is because the compression cylinder 62 advances until a constant pressure is received as a reaction force from the melt block 70.

  Therefore, the paper processing apparatus 30 according to the first embodiment includes a position sensor (not shown) that measures the arrival position of the compression cylinder 62, and information detected by the position sensor is transmitted to the control unit 80. The The controller 80 estimates the thickness of the lysate block 70 from the position where the compression cylinder 62 arrives, and adjusts the concentration of the solution according to the estimated thickness.

  FIG. 7 is a flowchart showing the procedure of the density adjustment process of the CPU 81 of the control unit 80 of the paper processing apparatus 30 according to the first embodiment of the present invention. As shown in FIG. 7, the CPU 81 of the control unit 80 initializes the counter to “1”, and sets the number of manufactured melt blocks 70 for a certain amount of waste paper 41 to be charged at a time to “X1”. (Step S701). For example, X1 = '40 'is set.

  The CPU 81 transmits an input instruction to input a certain amount of waste paper 41 to the waste paper input unit 40 (step S702). Here, “inputting the waste paper 41” means that the waste paper 41 is input to the dissolution tank 51 by the waste paper input unit 40. The waste paper input unit 40 that has received the input instruction pushes out the waste paper 41 on the second waste paper table 44 by the moving member 45, and a certain amount of the waste paper 41 is input into the dissolution tank 51.

  CPU81 transmits the rotation instruction | indication of the stirring blade 53 to the melt | dissolution part 50 (step S703), and the melt | dissolution part 50 which received the rotation instruction performs melt | dissolution and stirring of the waste paper 41. FIG. After stirring the solution for a certain time, the CPU 81 transmits a conveyance instruction to the main pump 71 so as to send the solution to the compression unit 60, and transmits an instruction to generate the melt block 70 to the compression unit 60 (step S704). The compression unit 60 that has received the generation instruction generates the melt block 70.

  The CPU 81 detects the thickness of the generated melt block 70 (step S705). The method for detecting the thickness of the lysate block 70 is not particularly limited. For example, as described above, it may be estimated from the arrival position of the compression cylinder 62. Further, any method may be used as long as the thickness of the sampled lysate block 70 is actually measured and the thickness can be acquired, such as receiving an input of an actual measurement value via the input / output interface 84.

  The CPU 81 determines whether or not the thickness of the melt block 70 is equal to or greater than a predetermined value (step S706). When the CPU 81 determines that the thickness of the melt block 70 is equal to or greater than the predetermined value (step S706: YES), the CPU 81 determines whether or not the counter is equal to or greater than the set production number (step S707).

  When the CPU 81 determines that the counter is equal to or greater than the set number of productions (step S707: YES), the CPU 81 ends the process. When the CPU 81 determines that the counter is smaller than the set production number (step S707: NO), the CPU 81 increments the counter by “1” (step S708), returns the process to step S704, and repeats the above-described process. .

  When the CPU 81 determines that the thickness of the melt block 70 is smaller than the predetermined value (step S706: NO), the CPU 81 determines whether or not the counter is equal to or larger than X2 (X1> X2) which is a value smaller than the production number X1. Is determined (step S709). When the CPU 81 determines that the counter is equal to or greater than X2 (step S709: YES), the CPU 81 ends the process.

  When the CPU 81 determines that the counter is smaller than X2 (step S709: NO), the CPU 81 changes the production number of the melt block 70 with respect to the fixed amount of waste paper 41 that is input at a time to “X2”, and the counter Is reset to '1' (step S710). For example, X2 = 15 is set. The CPU 81 returns the process to step S702 and increases the concentration of the solution by newly introducing a certain amount of waste paper 41.

  Thus, when the thickness of the lysate block 70 is equal to or greater than the predetermined value, it is determined that the concentration of the dissolved solution is appropriate, and conversely, when the thickness of the dissolved solution is smaller than the predetermined value, the concentration of the dissolved solution is reduced. to decide. When the concentration of the dissolving liquid is low, the concentration of the dissolving liquid can be increased by reducing the number of manufactured melt blocks 70 and newly introducing a certain amount of waste paper 41.

  As described above, according to the first embodiment, when the thickness of the generated melt block 70 is smaller than a predetermined value, the production number of the melt block 70 is changed to a value smaller than the set production number. Then, a certain amount of waste paper 41 is newly input. Thereby, the density | concentration of the melt | dissolution liquid of the waste paper 41 disentangled in the fiber form can be adjusted easily, and it becomes possible to keep the dispersion | variation in the thickness of the melt | dissolution block 70 produced | generated within a fixed range. .

(Embodiment 2)
Since the configuration of the paper processing apparatus 30 according to the second embodiment of the present invention is the same as that of the first embodiment, detailed description thereof will be omitted by attaching the same reference numerals. The second embodiment is different from the first embodiment in that the concentration of the dissolved solution is adjusted using the average value of the thickness of the dissolved material block 70 generated by introducing a certain amount of waste paper 41.

  FIG. 8 is a flowchart showing the procedure of the density adjustment process of the CPU 81 of the control unit 80 of the paper processing apparatus 30 according to the second embodiment of the present invention. As shown in FIG. 8, the CPU 81 of the control unit 80 initially sets the counter to “1”, and sets the number of manufactured melt blocks 70 for a certain amount of waste paper 41 to be loaded at a time to “X1”. (Step S801). For example, X1 = '40 'is set.

  The CPU 81 transmits an input instruction to input a certain amount of waste paper 41 to the waste paper input unit 40 (step S802). Here, “inputting the waste paper 41” means that the waste paper 41 is input to the dissolution tank 51 by the waste paper input unit 40. The waste paper input unit 40 that has received the input instruction pushes out the waste paper 41 on the second waste paper table 44 by the moving member 45, and a certain amount of the waste paper 41 is input into the dissolution tank 51.

  CPU81 transmits the rotation instruction | indication of the stirring blade 53 to the melt | dissolution part 50 (step S803), and the melt | dissolution part 50 which received the rotation instruction performs melt | dissolution and stirring of the waste paper 41. FIG. After stirring the solution for a certain period of time, the CPU 81 transmits a conveyance instruction to the main pump 71 so as to send the solution to the compression unit 60, and transmits an instruction to generate the dissolved material block 70 to the compression unit 60 (step S804). The compression unit 60 that has received the generation instruction performs the melt block 70.

  The CPU 81 detects the thickness of the generated melt block 70 and stores it in the storage device 83 (step S805). The method for detecting the thickness of the lysate block 70 is not particularly limited. For example, as described above, it may be estimated from the arrival position of the compression cylinder 62. Further, any method may be used as long as the thickness of the sampled lysate block 70 is actually measured and the thickness can be acquired, such as receiving an input of an actual measurement value via the input / output interface 84.

  The CPU 81 determines whether or not the counter is equal to or greater than the set number of productions (step S806). When the CPU 81 determines that the counter is smaller than the set production number (step S806: NO), the CPU 81 increments the counter by “1” (step S807), returns the process to step S804, and repeats the above-described process. .

  When the CPU 81 determines that the counter is equal to or greater than the set number of productions (step S806: YES), the CPU 81 stores the melt block 70 generated by inputting a certain amount of waste paper 41 stored therein. An average value of the thickness is calculated (step S808). CPU81 determines whether the average value of the thickness of the melt block 70 is equal to or greater than a predetermined value (step S809). When the CPU 81 determines that the average thickness of the melt block 70 is equal to or greater than the predetermined value (step S809: YES), the CPU 81 ends the process.

  When the CPU 81 determines that the average value of the thickness of the melt block 70 is smaller than the predetermined value (step S809: NO), the CPU 81 manufactures the melt block 70 for a certain amount of waste paper 41 that is input at a time. Is changed to 'X2' (X1> X2), which is a value smaller than 'X1', and the counter is reset to '1' (step S810). For example, X2 = '15 'is set. The CPU 81 returns the process to step S802 and increases the concentration of the solution by newly introducing a certain amount of waste paper 41.

  Thus, when the average value of the thickness of the lysate block 70 is equal to or greater than a predetermined value, it is determined that the concentration of the lysis solution is appropriate. Judge that it has become lower. When the concentration of the dissolving liquid is low, the concentration of the dissolving liquid can be increased by reducing the number of manufactured melt blocks 70 and newly introducing a certain amount of waste paper 41.

  As described above, according to the second embodiment, when the average value of the thickness of the generated melt block 70 is smaller than a predetermined value, the number of manufactured melt blocks 70 is smaller than the set number. And a certain amount of waste paper 41 is newly input. Thereby, the density | concentration of the melt | dissolution liquid of the waste paper 41 disentangled in the fiber form can be adjusted easily, and it becomes possible to keep the dispersion | variation in the thickness of the melt | dissolution block 70 produced | generated within a fixed range. .

  The paper processing apparatus according to the present invention can be implemented in a form in which various modifications are added to the above-described embodiment without departing from the spirit of the present invention. For example, the thickness of the lysate block 70 may be detected one by one or by sampling every 40th. Further, although the amount of waste paper 41 to be input at a time is a fixed amount, it does not have to be exactly a fixed amount, and a certain allowable range is recognized, for example, 350 to 400 A4 sheets.

DESCRIPTION OF SYMBOLS 30 Paper processing apparatus 40 Waste paper input part 41 Waste paper 42 1st waste paper stand 44 2nd waste paper stand 50 Dissolution part 51 Dissolution tank 53 Stirring blade 70 Melt block 80 Control part 81 CPU

Claims (6)

Put the waste paper into the dissolution tank where the solution is stored,
Disassembling the input waste paper into fibers in the dissolution tank,
Dissolved waste paper solution that has been fibrillated into a fiber shape is conveyed to the compression section by a pump.
Compress the dissolved solution transported by the compression unit, press the melt in the solution into a block shape,
A paper processing apparatus for recovering a melt block generated by press molding,
Block thickness acquisition means for acquiring the thickness of the lysate block;
A paper processing apparatus, comprising: a production number changing unit that changes the production number of the melt block for a certain amount of waste paper that is input at a time according to the acquired thickness. The production number changing means is
Determine whether the acquired thickness is less than the predetermined value,
When it is determined that the thickness is smaller than the predetermined value, the production number of the melt block is changed to a value smaller than the production number that is basically set,
2. The paper processing apparatus according to claim 1, wherein when it is determined that the thickness is equal to or greater than a predetermined value, the number of the melt blocks manufactured is set to a basic number of manufactures. The production number changing means is
Calculate the average thickness of the lysate block generated by adding a certain amount of waste paper,
If it is determined whether the calculated average value is smaller than the predetermined value and the average value is determined to be smaller than the predetermined value, the production number of the lysate block is changed to a value smaller than the basic production number,
2. The paper processing apparatus according to claim 1, wherein when it is determined that the average value is equal to or greater than a predetermined value, the number of manufactured melt blocks is set to a basic set number. Put the waste paper into the dissolution tank where the solution is stored,
Disassembling the input waste paper into fibers in the dissolution tank,
Dissolved waste paper solution that has been fibrillated into a fiber shape is conveyed to the compression section by a pump.
Compress the dissolved solution transported by the compression unit, press the melt in the solution into a block shape,
A paper processing method for recovering a press-formed melt block,
Obtaining the thickness of the lysate block;
A paper processing method, wherein the number of the melt blocks to be produced for a certain amount of waste paper fed at a time is changed according to the acquired thickness. Determine whether the acquired thickness is less than the predetermined value,
When it is determined that the thickness is smaller than the predetermined value, the production number of the melt block is changed to a value smaller than the production number that is basically set,
5. The paper processing method according to claim 4, wherein, when it is determined that the thickness is equal to or greater than a predetermined value, the production number of the melt block is set to a production number that is basically set. Calculate the average thickness of the lysate block generated by adding a certain amount of waste paper,
If it is determined whether the calculated average value is smaller than the predetermined value and the average value is determined to be smaller than the predetermined value, the production number of the lysate block is changed to a value smaller than the basic production number,
5. The paper processing method according to claim 4, wherein when it is determined that the average value is equal to or greater than a predetermined value, the production number of the melt block is set to a production number that is basically set.

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