Production method and production device of roll-shaped sanitary paper

Abstract

To inspect whether or not a trim is mixed in a product, and prevent the trim from being available on the market.SOLUTION: There is provided a production method of roll-shaped sanitary paper 3 including: a paper log generation step of generating a paper log 5; a cut step of cutting both end sides of the paper log 5 in a longitudinal direction, for cutting at a prescribed dimension, for generating a pair of trims 3T and multiple pieces of roll-shaped sanitary paper 3; and a trim removal step of removing the trims 3T from a production line by transporting the roll-shaped sanitary paper 3 generated in the cut step to the downstream side but not transporting the trims 3T to the downstream side. In the method, the number of removed trims 3Td is measured, and the measured number is compared with twice the number of the cut paper logs 5 cut in the cut step to determine whether or not the measured number is less than the twice the number of the cut paper logs.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a method and an apparatus for manufacturing a roll-shaped toilet paper including a step of removing the trim of a paper log.

Background Art

[0002] Conventionally, a roll-shaped toilet paper (hereinafter, also simply referred to as "roll-shaped toilet paper") in which toilet paper such as toilet paper, kitchen paper, paper towel, and paper wiper (hereinafter, also simply referred to as "toilet paper") is wound in a roll shape is obtained by cutting a paper log with a product width. However, since the portions corresponding to both ends of the paper log after cutting (hereinafter, also referred to as "trim") are not suitable as products, they are required to be removed in the production line.

[0003] Therefore, for example, Patent Document 1 describes a configuration in which, when it is determined that the outer dimensions of the roll-shaped toilet paper deviate from the specified dimensions, the object is determined as a dimension-defective product and removed to separately remove the trim.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, since the trim corresponds to both ends of the paper log, proper processing as a product is often not thorough, and it is considered not good for it to be on the market. However, in Patent Document 1, since the outer dimensions are the criteria for quality, if the outer dimensions of a certain trim meet the criteria of the specified dimensions, there is a risk that the trim will be judged as a good product and appear on the market as a product. On the other hand, if it is known in advance that the trim is mixed in the product, it is possible to take measures to prevent the trim from appearing on the market.

[0006] An object of the present invention is to provide a method and an apparatus for manufacturing a roll-shaped toilet paper capable of inspecting whether or not a trim is mixed into a product when removing the trim of a paper log and preventing the trim from being circulated in the market.

Means for Solving the Problems

[0007] A first aspect of the method according to the present invention is a method for manufacturing a roll-shaped toilet paper, including a paper log generation step of generating a paper log, and cutting both longitudinal ends of the paper log and cutting it to a predetermined size to generate a pair of trims and a plurality of roll-shaped toilet papers. A cutting step, and while conveying the roll-shaped toilet paper generated in the cutting step downstream, removing the trim by not conveying the trim downstream, including a trim removal step of removing the trim from the production line, measuring the number of the removed trims, and measuring the number of the removed trims. Comparing the measured number with twice the number of paper logs cut in the cutting step to determine whether the measured number is less than twice the number.

[0008] A second aspect of the method according to the present invention is a method for manufacturing a roll-shaped toilet paper, including a paper log generation step of generating a paper log, and cutting both longitudinal ends of the paper log and cutting it to a predetermined size to generate a pair of trims and a plurality of roll-shaped toilet papers. A cutting step, and while a picker unit conveys the roll-shaped toilet paper generated in the cutting step downstream, removing the trim by not conveying the trim downstream by the picker unit, including a trim removal step of removing the trim from the production line, the picker unit including a first pick member that lifts and conveys the generated roll-shaped toilet paper downstream, and a second pick member that lifts the trim and conveys it to a predetermined position downstream and stops lifting the trim at the predetermined position, and determining whether the second pick member holds the trim by blocking light of a photoelectric sensor installed downstream of the predetermined position.

[0009] A third aspect of the method according to the present invention is that, in the trimming removal step, the roll-shaped toilet paper and the trim generated in the cutting step are lifted by a picker unit and conveyed to a predetermined position downstream, and at the predetermined position, the picker unit stops lifting the trim, thereby dropping the trim, removing the trim from the production line, and measuring the number of the dropped trims, as described in the first aspect.

[0010] A first form of the apparatus according to the present invention is a manufacturing apparatus for roll-shaped toilet paper, comprising a paper log generation unit that generates a paper log, a cutting unit that cuts both longitudinal ends of the paper log and cuts it to a predetermined dimension to generate a pair of trims and a plurality of roll-shaped toilet papers, a conveyor unit that conveys the roll-shaped toilet paper and the trim downstream, a trim removal unit that removes the trim from the production line by conveying the roll-shaped toilet paper conveyed by the conveyor unit downstream while not conveying the trim downstream, a measurement unit that measures the number of the removed trims, and a comparison determination unit that compares the number of the dropped trims measured by the measurement unit with twice the number of the paper logs cut in the cutting unit and determines whether the measured number is less than twice the number.

[0011] A second form of the apparatus according to the present invention is a manufacturing apparatus for roll-shaped toilet paper, comprising a paper log generation unit that generates a paper log, and a cutting unit that cuts both longitudinal ends of the paper log and cuts it into a predetermined size to generate a pair of trims and a plurality of roll-shaped toilet papers. A trim removal unit that removes the trim from the production line by transporting the roll-shaped toilet paper generated in the cutting unit downstream while not transporting the trim downstream. The trim removal unit includes a first pick member that lifts the generated roll-shaped toilet paper and transports it downstream, and a second pick member that lifts the trim and transports it to a predetermined position downstream and stops lifting the trim at the predetermined position. The manufacturing apparatus includes a photoelectric sensor installed downstream of the predetermined position, and a light shielding determination unit that determines whether or not to shield light when the light from the photoelectric sensor is applied to the place where the second pick member holds the trim.

Effects of the Invention

[0012] According to the present invention, it is possible to determine whether or not a trim is mixed in a product, and thus it is possible to surely remove the trim and obtain an appropriate roll-shaped toilet paper product.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0014] An embodiment of a manufacturing apparatus in which a manufacturing method for manufacturing roll-shaped toilet paper according to the present invention is performed will be described in detail with reference to FIGS. 1 to 3. However, the present invention is not limited to the aspects of this embodiment.

[0015] In the present specification and claims, as described above, the "rolled toilet paper" is toilet paper rolled in a roll shape, and the "toilet paper" is referred to as including toilet paper, kitchen paper, paper towels, paper wipes, etc.

[0016] <First Embodiment> <Manufacturing Apparatus> FIG. 1 is a schematic perspective view of a manufacturing apparatus 1 in which a manufacturing method according to an embodiment of the present invention is performed, and FIG. 2 is a schematic block diagram of a trimming unit 40 shown in FIG. 1.

[0017] As shown in FIG. 1, a manufacturing apparatus 1 for rolled toilet paper according to the present embodiment manufactures a rolled toilet paper (toilet roll) 3 in which toilet paper (toilet paper in the present embodiment) is wound in a roll shape.

[0018] The manufacturing apparatus 1 is provided with a paper log generation unit 10 that forms a roll-shaped paper log 5 that is longer in the axial direction than the rolled toilet paper 3, an adjustment unit 20 that temporarily stores the paper log 5 formed by the paper log generation unit 10 and adjusts the delivery timing of the paper log 5, and a cut unit 30 that cuts both longitudinal ends of the paper log 5 sent out from the adjustment unit 20 to cut it into a predetermined size, thereby generating a pair of trims 3T and a plurality of rolled toilet papers 3. Further, the manufacturing apparatus 1 is provided with a trimming unit 40 that removes the trim 3T from the rolled toilet paper 3 and the trim 3T cut by the cut unit 30, a packaging unit 50 that packages the rolled toilet paper 3 after removing the trim 3T in predetermined numbers, and a boxing unit 60 that boxes the packages 9 of the rolled toilet paper 3 packaged by the packaging unit 50.

[0019] In the present embodiment, as shown in FIGS. 1 and 2, in the trimming unit 40 of the manufacturing apparatus 1 for the rolled toilet paper 3, the trim 3T is removed from the manufacturing line, and it is determined whether the measured number is less than twice the number of the removed trims 3Td compared to twice the number of the paper logs 5.

[0020] Hereinafter, the upstream and downstream are defined based on the order of the processes of each part implemented in the manufacturing apparatus 1. In the manufacturing apparatus 1, a paper log generation unit 10, an adjustment unit 20, a cutting unit 30, a trimming processing unit 40, a packaging unit 50, and a boxing unit 60 are arranged in this order from upstream to downstream.

[0021] The paper log forming unit 10 feeds out the base paper 11 (material), which is a strip-shaped base paper wider than the roll-shaped toilet paper 3, from the parent roll 12 around which the base paper 11 is wound, and rewinds this base paper 11 with a winder 13 to form a paper log 5. The paper log 5 has a roll shape with an axial length equal to the axial length of the parent roll 12 and a diameter equal to the diameter of the product 3.

[0022] The winder 13 may perform embossing or printing on the base paper 11. Further, the parent roll 12 may be a primary parent roll (jumbo roll) around which a single-layer (1 ply) base paper 11 made of a single paper material is wound, or a secondary parent roll around which a multi-layer (2 plies or more) base paper 11 formed by laminating a plurality of paper materials is wound.

[0023] The winder 13 continuously forms the paper log 5 by cutting the base paper 11 every time a predetermined length of the base paper 11 is wound around the cylindrical core 5c (long core tube). The base paper 11 is wound from the inner peripheral side (core 5c side) to the outer peripheral side of the paper log 5 (that is, from the inner side to the outer side in the radial direction). Then, when a predetermined length of the base paper 11 is wound around the outer periphery of the core 5c, the paper log 5 is formed by cutting (dividing) the base paper 11 along a straight line intersecting the longitudinal direction of the base paper 11. Here, an example is shown in which the base paper 11 is cut along a straight line extending in its width direction (a direction orthogonal to the longitudinal direction).

[0024] Among the base paper 11 continuously forming the paper log 5 as described above, the portion on the downstream side of the straight line becomes the winding end 5a (tail) in one paper log 5, and the portion on the upstream side of the straight line (the portion separated from the winding end 5a) becomes the winding start end 5b in the next log 5.

[0025] As shown in FIG. 1, after the winding end 5a of each paper log 5 is pasted (tail sealed) on the outer peripheral surface in the pasting section 14 which is the final process of the paper log generation section 10, it is sent to the downstream adjustment section 20.

[0026] The adjustment section 20 sequentially feeds out the paper logs 5 to the downstream cutting section 30 while stocking a plurality of paper logs 5 with the accumulator 21. Here, an adjustment section 20 that feeds out two paper logs 5 at a time toward the cutting section 30 is illustrated.

[0027] The cutting section 30 cuts the paper log 5 sent out from the adjustment section 20 at a predetermined interval in the axial direction with the log saw 31. Thereby, each paper log 5 is cut into a plurality of roll-shaped toilet papers 3. In the present invention, for example, by cutting one paper log 5, 20 roll-shaped toilet papers 3 and a pair of trims 3T are obtained.

[0028] In the trimming unit 40, as shown in FIG. 2, the roll-shaped toilet paper 3 and the trim 3T that are generated in the cutting unit 30 and conveyed by the flight member 41 of the flight conveyor unit are lifted and conveyed downstream, and the lifting of the trim 3T is stopped at a predetermined position, so that a pair of trims 3T (the trim 3T on the leading side and the trim 3T on the trailing side of the paper log) are dropped and removed. The number of the dropped trims 3Td is measured, and the measured number is compared with twice the number of the paper logs 5 to be cut in the cutting unit 30 to determine whether the measured number is less than twice the number. Details will be described later. In the present embodiment, in the trimming unit 40, the roll-shaped toilet paper 3 and the trim 3T that are conveyed by the flight member 41 of the flight conveyor unit are lifted and conveyed downstream, and the lifting of the trim 3T is stopped at a predetermined position, so that the trim 3T is dropped and removed. However, the present invention is not limited to this. For example, for the roll-shaped toilet paper 3 and the trim 3T that are conveyed by the flight member 41 of the flight conveyor unit, the roll-shaped toilet paper 3 is placed (or sucked from above) on a conveying member (for example, a lower support member (such as a holder) or a suction member), and the trim 3T is not placed (or sucked), so that the trim 3T is dropped and removed. Further, in the present invention, since the trim 3T only needs to be removed from the production line, not only the method of dropping the trim 3T but also the method of removing the trim 3T by lifting it, for example, is acceptable. The flight conveyor unit includes a known flight conveyor, and the flight member 41 of the flight conveyor unit is, for example, a flight bar or a flat plate.

[0029] The packaging unit 50 inserts, for example, eight (four × two stages) roll-shaped toilet papers 3 as a set into the packaging bag 19, seals the opening 22 of the packaging bag 19, and forms the package 9.

[0030] The boxing unit 60 packs eight sets of a plurality of (for example, eight) packages 9 into the cardboard box 23 as a set. Then, the packages 9 packed in the cardboard box 23 are shipped.

[0031] <Trimming unit> As shown in Fig. 2, the trimming unit 40 of the present embodiment includes a flight conveyor unit having a flight member 41 that conveys the roll-shaped toilet paper 3 and the trim 3T generated in the cutting unit 30 from upstream to downstream, and a picker unit (trim removal unit) 42 that lifts the roll-shaped toilet paper 3 and the trim 3T conveyed by the flight member 41 of the flight conveyor unit with a pick member 421 and conveys them downstream, and stops lifting the trim 3T with the pick member 421 at a predetermined position, while conveying the roll-shaped toilet paper 3 to the belt conveyor unit 43; a belt conveyor unit 43 that conveys the roll-shaped toilet paper 3 conveyed by the pick member 421 downstream; and a trim conveyor unit 44 that places the trim 3Td that has fallen after the picker unit 42 stops lifting and conveys it to a predetermined processing location (see arrows A, B, and C in Fig. 2). Further, the trimming unit 40 includes a sensor unit 451 that detects the trim 3Td that has fallen (passed) as a result of the picker unit 42 stopping lifting, and a control device 452 that receives a detection signal from the sensor unit 451, measures the number of the fallen trims 3Td based on the detection signal, compares the measured number with twice the number of the paper logs 5 cut in the cutting step 30, and determines whether the measured number is less than twice the number. The trimming unit 40 is provided with a determination device 45 including the control device 452.

[0032] In the picker unit 42, the roll-shaped toilet paper 3 and the trim 3T are conveyed at a predetermined interval. As shown in FIG. 2, the pick member 421 of the picker unit 42 has a pair of reversely approximately U-shaped members, and sandwiches the roll-shaped toilet paper 3 and the trim 3T with the pair of members, respectively. In the present invention, the pick member 421 is not limited to the reversely approximately U shape, and can have various shapes as long as it can sandwich and convey the roll-shaped toilet paper 3 and the trim 3T. The picker unit 42 is controlled, for example, based on the position information of the roll-shaped toilet paper 3 and the trim 3T (or a periodic signal instructing not to lift the trim 3T, for example), to lift the roll-shaped toilet paper 3 and not to lift the trim 3T. That is, for a pair of trims 3T and a plurality of roll-shaped toilet papers 3 generated by cutting one paper log 5, the position information of the flight conveyor unit and the picker unit is recorded in the recording unit in advance (for example, recorded in association with the angle information from 0° to 360°). When a predetermined pick member 421 of the picker unit 42 comes to a predetermined location, the control device of the picker unit 42 sends a signal to stop the lifting to the picker unit 42, and the trim 3T falls from the pick member 421. In the present embodiment, the roll-shaped toilet paper 3 is lifted from above, but in the present invention, a mode of conveying while supporting the roll-shaped toilet paper 3 from below or a mode of sucking and holding the roll-shaped toilet paper 3 from above may also be allowed. As the sensor unit 451, for example, a photoelectric sensor such as a phototube is used. In the present invention, the place for measuring the number of trims 3Td removed from the production line may be anywhere as long as the effects of the present invention are achieved. In the present embodiment, the detection is performed at the position where the trim 3T has completely fallen. In the belt conveyor unit 43, or on the upstream side or the downstream side thereof, a step of blowing off paper powder and dust attached to the roll-shaped toilet paper 3 with air or the like during the conveyance of the roll-shaped toilet paper 3 may be provided.

[0033] As shown in FIG. 2, the control device 452 includes a measurement unit 4521 that receives a detection signal from the sensor unit 451 and measures the number of trims 3Td that have fallen based on the detection signal, and a comparison determination unit 4522 that compares the measured number with the number of paper logs 5 stored in a storage unit (not shown), that is, twice the number of paper logs 5 to be cut in the cutting process 30 (for example, counted in advance), and determines whether the measured number is less than twice the number. In the present invention, for example, the CPU of the control device 452 may command to output the determination result in the comparison determination unit 4522 to the display unit so that it can be visually recognized by the user. Thereby, when the measured number is less than twice the number, it is possible to consider the possibility that the trim 3T has been mixed into the product or to use it as a basis for determining to stop the production line. In the present invention, when the measured number is less than twice the number, the machine or production line having the function of transporting the roll-shaped toilet paper 3 may be automatically stopped or an alarm may be sounded. Further, in the present embodiment, the control device 452 is included in the trim processing unit 40, but in the present invention, it may be incorporated in the manufacturing apparatus 1 of the roll-shaped toilet paper 3 other than the trim processing unit 40.

[0034] Conventionally, roll-shaped toilet paper is obtained by cutting a paper log to the product width, but the remaining trims are not suitable as products, so they are required to be removed within the production line. When it is determined that the outer dimensions of the roll-shaped toilet paper deviate from the specified dimensions, a configuration is described in, for example, Patent Document 1 in which the trims are separately removed by determining the object as a dimension defective product and removing it.

[0035] By the way, since the trims correspond to both ends of the paper log, proper processing as a product is often not thorough, and it is considered that it is not good for them to be on the market. However, in Patent Document 1, since the outer dimensions are the criteria for quality, if the outer dimensions of a certain trim meet the criteria of the specified dimensions, there is a risk that the trim will be judged as a good product and be on the market as a product. On the other hand, if it is known in advance that the trim has been mixed into the product, it is possible to take measures to prevent the trim from being on the market.

[0036] According to this embodiment, by comparing the number that is twice the number of the paper logs 5 with the number of the removed trims 3Td, it is possible to determine whether or not the trim 3T is mixed into the product. That is, it is possible to perform, by trim measurement, the determination as to whether or not the trim 3T has been removed outside the system. As a result, it becomes possible to more surely remove the trim 3T and obtain a product of the proper roll-shaped toilet paper 3.

[0037] In the present invention, it is also possible to determine whether or not the trim 3T is mixed into the product by the light shielding of a photoelectric sensor.

[0038] <Second Embodiment> Unlike the first embodiment, the second embodiment of the present invention determines whether or not the second pick member 421b of the picker unit 42 holds the trim 3T by the light shielding of a photoelectric sensor 451' installed downstream of a predetermined position that is the dropping position of the trim 3T in the trim processing unit 40'.

[0039] FIG. 3 is a schematic block diagram of the trim processing unit shown in FIG. 1 according to the second embodiment of the present invention. Among the elements constituting the trim processing unit 40' according to this embodiment, those having the same functions are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.

[0040] As shown in FIG. 3, the trimming unit 40' of the present embodiment includes a flight conveyor unit having a flight member 41 that conveys the roll-shaped toilet paper 3 and the trim 3T generated in the cutting unit 30 from upstream to downstream, a first pick member 421a that lifts the roll-shaped toilet paper 3 conveyed by the flight member 41 of the flight conveyor unit and conveys it to the downstream belt conveyor unit 43, and a second pick member 421b that lifts the trim 3T and conveys it downstream, and stops lifting the trim 3T at a predetermined position. A picker unit (trim removal unit) 42 including the above, a belt conveyor unit 43 that conveys the roll-shaped toilet paper 3 conveyed by the first pick member 421a downstream, and a trim conveyor unit that places the trim 3Td that has fallen after the second pick member 421b of the picker unit 42 stops lifting and conveys it to a predetermined processing location (see arrows A, B, and C in FIG. 3). 44.

[0041] Further, the trimming unit 40' includes a sensor unit (photoelectric sensor) 451' installed downstream of a predetermined position, and a control device 452' that irradiates the light from the photoelectric sensor 451' to the position where the second pick member 421b holds the trim 3T, and determines whether or not the light is blocked. It includes a determination device 45' including

[0042] In the picker unit 42, the roll-shaped toilet paper 3 and the trim 3T are conveyed at a predetermined interval in the same manner as in the first embodiment. The first pick member 421a that conveys the roll-shaped toilet paper 3 and the second pick member 421b that conveys the trim 3T in the picker unit 42 have a pair of reverse substantially U-shaped members as shown in FIG. 3, similar to the first embodiment, and the roll-shaped toilet paper 3 and the trim 3T are respectively sandwiched between the pair of members.

[0043] Similar to the first embodiment, the picker unit 42 controls the lifting of the roll-shaped toilet paper 3 and prevents the trimming 3T from being lifted based on, for example, the position information of the roll-shaped toilet paper 3 and the trimming 3T (or a periodic signal instructing not to lift the trimming 3T, for example). That is, for a pair of trimmings 3T and a plurality of roll-shaped toilet papers 3 generated by cutting one paper log 5, the position information of the flight conveyor unit and the picker unit is recorded in the recording unit in advance (for example, recorded in association with the angular information from 0° to 360°). When the second pick member 421b of the picker unit 42 reaches a predetermined position, the control device of the picker unit 42 sends a signal to stop the lifting of the picker unit 42, and the trimming 3T falls from the second pick member 421b.

[0044] The photoelectric sensor 451' is a transmissive type having a light projecting unit and a light receiving unit, and for example, a phototube is used.

[0045] As shown in FIG. 3, the control device 452' includes a light shielding determination unit 4523 that determines whether or not to shield light when projecting light from the photoelectric sensor 451' onto the location where the trimming 3T of the second pick member 421b is held downstream of a predetermined position.

[0046] In this embodiment, one revolution of the picker unit 42 (that is, the positions of the first pick member 421a and the second pick member 421b) is associated with the angular information of 360°. Twenty first pick members 421a that grasp the 20 roll-shaped toilet papers 3 generated by cutting one paper log 5 between 30° and 330° are located, and two second pick members 421b that grasp a pair of trimmings 3T between 330° and 30° are located. When the second pick member 421b of the picker unit 42 reaches a predetermined position, after the control device of the picker unit 42 sends a signal to stop the lifting of the picker unit 42, the light projecting unit of the photoelectric sensor 451' projects light onto the location where the trimming 3T of the second pick member 421b is held between 330° and 30°. When the light receiving unit of the photoelectric sensor 451' cannot detect light, based on the non-detection signal, the light shielding determination unit 4523 determines that light is shielded.

[0047] In the present invention, when the light shielding determination unit 4523 determines that the second pick member 421b is shielding light, the machine having the function of conveying the roll-shaped toilet paper 3 may be automatically stopped and an alarm may be configured to sound. Further, in the present invention, for example, the CPU of the control device 452' may be instructed to output the determination result of the light shielding determination unit 4523 to the display unit to make it visible to the user. In the present embodiment, the control device 452' is included in the trimming unit 40', but in the present invention, it may be incorporated into the manufacturing apparatus 1 of the roll-shaped toilet paper other than the trimming unit 40.

[0048] According to the present embodiment, it is possible to determine whether or not the trim 3T is mixed into the product due to the light shielding of the photoelectric sensor 451', and thus it is possible to more reliably remove the trim 3T and obtain an appropriate roll-shaped toilet paper 3 product.

[0049] <Others> The present invention is not limited to the above-described embodiments and the modification examples described throughout, and appropriate changes and modifications can be made without departing from the technical idea of the present invention.

[0050] For example, in each of the above embodiments, the number of trims removed is measured for the two paper logs 5, but in the present invention, the number of paper logs 5 may be four or other numbers.

[0051] In addition, a form combining the first embodiment and the second embodiment is also acceptable in the present invention as long as the effects of the present invention are achieved.

[0052] The control devices 452 and 452' according to the above embodiments and the control device of the picker unit 42 may include a control unit and a storage unit for storing various data and threshold data generated by the control unit. The control unit includes a CPU (Central Processing Unit), and each of the above-described functional units can be executed by the CPU. The storage unit is composed of a storage area such as a ROM (Read Only Memory) or a RAM (Random Access Memory), for example. The control devices 452 and 452' and the control device of the picker unit 42 may be the same control device.

Explanation of Signs

[0053] 1 Manufacturing apparatus for roll-shaped toilet paper 3 Roll-shaped toilet paper 3T Trim 3Td Trim removed (removed from the production line) 5 Paper log 5a End of winding 5b Start of winding 5c Core 5S Paper log after cutting 10 Paper log generation unit 11 Base paper (material) 12 Reel of base paper 13 Winders 14 Gluing section 20 Adjustment section 21 Accumulator 30 Cutting section 31 Log saw 40 Trim processing section 41 Flight member (of the flight conveyor section) 42 Picker unit (trim removal unit) 421 Pick member 421a First pick member 421b Second pick member 43 Belt conveyor section 44 Trim conveyor section 45, 45' Judgment device 451, 451' Sensor section (photoelectric sensor) Control devices 452 and 452' Measurement unit 4521 Comparison and determination unit 4522 Light shielding determination unit 4523 Packaging unit 50 Box packing unit 60

Claims

1. A method for manufacturing roll-shaped toilet paper, comprising: a paper log generation step of generating a paper log; a cutting step of cutting both longitudinal ends of the paper log to a predetermined dimension to generate a pair of trims and a plurality of roll-shaped toilet papers; a trim removal step of removing the trim from the production line by transporting the roll-shaped toilet paper generated in the cutting step downstream while not transporting the trim downstream; measuring the number of the removed trims, comparing the measured number with twice the number of paper logs cut in the cutting step, and determining whether the measured number is less than twice the number.

2. A method for manufacturing roll-shaped toilet paper, comprising: a paper log generation step of generating a paper log; a cutting step of cutting both longitudinal ends of the paper log to a predetermined dimension to generate a pair of trims and a plurality of roll-shaped toilet papers; a trim removal step of removing the trim from the production line by transporting the roll-shaped toilet paper generated in the cutting step downstream by a picker section while not transporting the trim downstream by the picker section; the picker section includes a first pick member that lifts and transports the generated roll-shaped toilet paper downstream, and a second pick member that lifts the trim and transports it to a predetermined position downstream and stops lifting the trim at the predetermined position; determining whether the second pick member holds the trim by blocking light of a photoelectric sensor installed downstream of the predetermined position.

3. In the trim removal step, the roll-shaped toilet paper and the trim generated in the cutting step are lifted by a picker section and transported to a predetermined position downstream, and the picker section stops lifting the trim at the predetermined position, so that the trim falls, and the trim is removed from the production line; The method for manufacturing roll-shaped toilet paper according to claim 1, characterized in that the number of the fallen trims is measured.

4. A manufacturing apparatus for roll-shaped toilet paper, comprising: a paper log generation section for generating a paper log; A cutting unit that generates a pair of trims and a plurality of roll-shaped toilet papers by cutting both longitudinal ends of the paper log and cutting it to a predetermined size; A trim removal unit that removes the trim from the production line and removes it by transporting the roll-shaped toilet paper generated in the cutting unit downstream while not transporting the trim downstream; A measuring unit that measures the number of the removed trims; A comparison determination unit that compares the number of the removed trims measured by the measuring unit with twice the number of the paper logs cut in the cutting unit and determines whether the measured number is less than twice the number; A manufacturing apparatus for roll-shaped toilet paper, characterized by comprising the above.

5. A manufacturing apparatus for roll-shaped toilet paper, comprising: A paper log generation unit that generates a paper log; A cutting unit that generates a pair of trims and a plurality of roll-shaped toilet papers by cutting both longitudinal ends of the paper log and cutting it to a predetermined size; A trim removal unit that removes the trim from the production line and removes it by transporting the roll-shaped toilet paper generated in the cutting unit downstream while not transporting the trim downstream, The trim removal unit includes a first pick member that lifts and transports the generated roll-shaped toilet paper downstream, and a second pick member that lifts the trim and transports it to a predetermined position downstream and stops lifting the trim at the predetermined position; The manufacturing apparatus is characterized by comprising a photoelectric sensor installed downstream of the predetermined position, and a light shielding determination unit that determines whether to shield light when the light from the photoelectric sensor is applied to the place where the second pick member holds the trim.

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