Method of oil treatment and oil treatment device

Abstract

To improve quality of a product that is formed by cutting a paper material.SOLUTION: An oil treatment device 1 assembled to a cutting part 30 for cutting a paper material 5 into two or more products 3 with a cutting blade 32 includes an oil supply part 6 and a wiping out part 7. The oil supply part 6 supplies oil to at least one of the lateral surfaces 34, 35 on both sides of the cutting blade 32. The wiping out part 7 wipes out the oil with a cleaning material 8 other than a product 3 before the oil supplied to the lateral surfaces 34, 35 comes into contact with the product 3.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an oil treatment method and an oil treatment device used when cutting paper material with a cutting blade. [Background technology]

[0002] Various methods for cutting paper material to be cut into products such as toilet paper and tissue paper have been known in the past. For example, Patent Document 1 discloses a method for cutting a paper material to be cut by passing the paper material between a pair of upper and lower rotating slitter blades (cutting blades). In the method of Patent Document 1, oil is constantly sprayed as a lubricant onto the cutting edge of the lower slitter blade, thereby suppressing wear on the slitter blade, maintaining its sharpness, and reducing the generation of paper dust. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-179687 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when cutting paper with a cutting blade that is constantly sprayed with oil as described in Patent Document 1, the oil adhering to the cutting blade may adhere to the paper along with contaminants such as paper dust. This may result in a deterioration in the quality of products made from the paper. On the other hand, if oil is not supplied to the cutting blade, the cutting blade may lose its sharpness and may not be able to cut the paper smoothly. Therefore, in this case as well, the quality of products made from the paper may be reduced.

[0005] The present invention was conceived in consideration of the above-mentioned problems, and one of its objectives is to improve the quality of products made by cutting paper material. However, other objectives of the present invention are not limited to this objective. The functions and effects derived from the various configurations shown in the "Mode for Carrying Out the Invention" below, which cannot be obtained with conventional technology, can also be considered as other objectives of the present invention. [Means for solving the problem]

[0006] The oil treatment method in this case is an oil treatment method used in a cutting process in which paper material is cut into multiple products using a cutting blade, and includes an oil supplying process in which oil is supplied to at least one of the two side surfaces of the cutting blade, and a wiping process in which the oil supplied to the side surface is wiped off with a cleaning material other than the product before it comes into contact with the product.

[0007] The oil treatment device in this case is an oil treatment device incorporated into a cutting part that cuts paper material into multiple products using a cutting blade, and is equipped with an oil supply unit that supplies oil to at least one of the side surfaces on both sides of the cutting blade, and a wiping unit that wipes off the oil supplied to the side surface with a cleaning material other than the product before it comes into contact with the product.

[0008] (1) An oil treatment method used in a cutting process in which paper material is cut into multiple products with a cutting blade, comprising: an oil supplying step of supplying oil to at least one of both side surfaces of the cutting blade; a wiping step of wiping off the oil supplied to the side surface with a cleaning material other than the product before the oil comes into contact with the product. An oil treatment method characterized by: (2) In the cutting step, the paper material is cut into a plurality of products by the revolving cutting blade, The oil supplying step supplies the oil to the side surface located on the side of the edge portion during a revolution cycle in which the cutting blade cuts the edge portion, which is an end portion of the paper material and does not become the product, The wiping step includes wiping off the oil supplied to the side surface located near the edge portion with the edge portion as a cleaning material when the edge portion is cut by the cutting blade. The oil treatment method according to (1) above. (3) The oiling process includes a first oiling process of supplying the oil to one of the side surfaces located on the side of the first ear portion in a revolution cycle in which the cutting blade cuts the first ear portion, which is one of the ends of the paper material, and a second oiling process of supplying the oil to the other of the side surfaces located on the side of the second ear portion in a revolution cycle in which the cutting blade cuts the second ear portion, which is the other end of the paper material, The wiping step includes a first wiping step of wiping off the oil supplied to the side surface in the first oiling step with the first ear portion as the cleaning material, as the cutting blade cuts off the first ear portion, and a second wiping step of wiping off the oil supplied to the side surface in the second oiling step with the second ear portion as the cleaning material, as the cutting blade cuts off the second ear portion. The oil treatment method according to (2) above. (4) The oil supplying step supplies the oil to both side surfaces during a paper material replacement period from when cutting of the paper material into the products is completed until cutting of the next paper material into the products is started, The wiping step involves wiping off the oil supplied to both side surfaces with an oil-absorbing material serving as the cleaning material, which is different from the paper material, during a paper material replacement period. The oil treatment method according to any one of (1) to (3), characterized in that: (5) In the cutting step, the paper material is cut into a plurality of products by the revolving cutting blade, The oil supplying step supplies the oil to both side surfaces of the cutting blade at the first revolution of the cutting blade during the paper material replacement period. The oil treatment method according to (4), characterized in that (6) The wiping step is a step of wiping off the oil with the oil absorbent material a number of times corresponding to the number of revolutions of the cutting blade after the oil supply step is performed during the paper material replacement period. The oil treatment method according to (5), (7) The oiling step is carried out again after a predetermined number of the products have been cut since the wiping step was carried out. The oil treatment method according to any one of (1) to (6), characterized in that: (8) An oil treatment device incorporated into a cutting part that cuts paper material into multiple products with a cutting blade, an oil supply unit that supplies oil to at least one of both side surfaces of the cutting blade; and a wiping unit that wipes off the oil supplied to the side surface with a cleaning material other than the product before the oil comes into contact with the product. An oil treatment device characterized by: [Effects of the Invention]

[0009] According to the present invention, the quality of the products made by cutting paper materials can be improved. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic perspective view of a production line including a cutting part in which an oil treatment device is incorporated. [Figure 2] FIG. 2 is a schematic perspective view of a cut part. [Figure 3] FIG. 1 is a front view of a paper log being cut into multiple products. [Figure 4] 1A and 1B are schematic front views of a log saw, in which FIG. 1A shows the moment when the first ear of the log is cut, and FIG. 1B shows the moment when the second ear of the log is cut. [Figure 5] 1A and 1B are schematic front views of a log saw, in which FIG. 1A shows the revolution period for cutting the first ear of the log, and FIG. 1B shows the revolution period for cutting the second ear of the log. [Figure 6] FIG. 10 is a schematic front view of the log saw during a paper material replacement period. [Figure 7] 1 is a flow chart of a manufacturing process including a cutting process in which an oil treatment method is used. [Figure 8] 10 is a flowchart illustrating an example of a process performed in a cutting step. [Figure 9] 10 is a flowchart showing another example of the process performed in the cutting step. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following describes embodiments for carrying out the present invention. The embodiments described below are merely examples, and are not intended to exclude various modifications or applications of techniques not explicitly stated herein. The configurations of the following embodiments can be modified in various ways without departing from the spirit of the invention. Furthermore, they can be selected or combined as needed.

[0012] [1. Equipment] [1-1. Overall structure] As shown in Fig. 1, an oil processing device 1 according to this embodiment is applied to a production line 4 that produces a roll-shaped product 3. Here, the product 3 is exemplified as toilet paper (toilet roll) made of strip-shaped sanitary paper wound into a roll. However, the product 3 is not particularly limited as long as it is made of cut paper material, and may be, for example, kitchen paper made of strip-shaped sanitary paper (paper material) wound into a roll, or a bundle of tissues made of stacked sheets of sanitary paper (paper material).

[0013] The production line 4 is provided with a log forming part 10 that forms roll-shaped logs 5 that are axially longer than the products 3, an adjusting part 20 that temporarily stores the logs 5 formed in the log forming part 10 and adjusts the timing of sending out the logs 5, and a cutting part 30 that cuts the logs 5 sent out from the adjusting part 20 into a plurality of products 3. The production line 4 is further provided with a packaging part 40 that packages a certain number of the products 3 cut out by the cutting part 30, and a boxing part 50 that boxes the packages 9 of the products 3 packaged by the packaging part 40.

[0014] Hereinafter, upstream and downstream are defined based on the order of each process performed on the production line 4. On the production line 4, a log forming part 10, an adjusting part 20, a cutting part 30, a packaging part 40, and a boxing part 50 are arranged in this order from upstream to downstream.

[0015] The log forming part 10 unwinds the base paper 11 (material) from a base roll 12 around which the base paper 11 is wound in a strip shape that is wider than the product 3, and rewinds the base paper 11 with a winder 13 to form a log 5. The log 5 is a paper material wound into a roll (i.e., a paper material), and has an axial length equal to the axial length of the base roll 12 and a diameter equal to the diameter of the product 3. In the winder 13, the base paper 11 may be embossed or printed. The base paper roll 12 may be a primary base paper (jumbo roll) on which a single layer (one ply) of base paper 11 made of one sheet of paper material is wound, or a secondary base paper on which multi-layer (two or more plies) base paper 11 made of multiple sheets of paper material is wound.

[0016] The winder 13 cuts the base paper 11 every time it is wound around a cylindrical core 5c (long core tube) by a predetermined length, thereby continuously forming logs 5. More specifically, the base paper 11 is wound from the inner periphery (core 5c side) of the log 5 toward the outer periphery (i.e., from the inside to the outside in the radial direction). Then, once a predetermined length of base paper 11 has been wound around the outer periphery of the core 5c, the base paper 11 is cut (divided) along a straight line along the width direction of the base paper 11 (a direction perpendicular to the longitudinal direction), thereby forming logs 5. Each log 5 has its winding end 5a glued (tail sealed) to the outer periphery in a gluing part 14, which is the final process in the log forming part 10, and then sent to the downstream adjusting part 20.

[0017] The adjusting part 20 stores a plurality of logs 5 in an accumulator 21, and sequentially sends the logs 5 to the downstream cutting part 30. Here, an adjusting part 20 that sends two logs 5 at a time to the cutting part 30 will be illustrated as an example. The cutting part 30 cuts the logs 5 sent out from the adjusting part 20 in the axial direction at predetermined intervals using a log saw 31. As a result, each log 5 is cut into a plurality of products 3.

[0018] The packaging part 40 inserts, for example, four products 3 (two products x two layers) as a set into the packaging bag 22 and seals the opening 19 of the packaging bag 22 to form the package 9. The boxing department 50 packs a set of a plurality of packages 9 (for example, four packages) into a cardboard box 23. Then, the packages 9 packed in the cardboard box 23 are shipped.

[0019] [1-2. Main part configuration] [1-2-1. Cutting part] 2, the log saw 31 of the cutting part 30 has a disk-shaped cutting blade 32 with a sharp outer periphery and a support arm 33 that rotatably supports a center portion 36 of the cutting blade 32. The cutting blade 32 rotates relative to the support arm 33 around a rotation axis A2 that passes through the center portion 36 and extends in the thickness direction of the cutting blade 32.

[0020] Meanwhile, the support arm 33 rotates at its base end opposite the tip end to which the cutting blade 32 is attached, around a rotation axis A3 that extends parallel to the rotation axis A2 of the cutting blade 32. Therefore, it can be said that the cutting blade 32 rotates about the rotation axis A2 and revolves around the rotation axis A3 of the support arm 33. For this reason, in the following description, the rotation axis A2 of the cutting blade 32 will also be referred to as the "rotation axis A2," and the rotation axis A3 of the support arm 33 will also be referred to as the "revolution axis A3."

[0021] As described above, in the cutting part 30 of this embodiment, the log 5 is cut into a plurality of products 3 by the cutting blade 32 that rotates and revolves. The revolving cutting blade 32 alternately comes into contact (cuts) and does not come into contact (separates) with the log 5 set in a position where it can be cut. That is, in the process of making one revolution around the revolution axis A3, the cutting blade 32 cuts the log 5 (comes into contact with the log 5) at the position where the log 5 is set, and separates from the log 5 at other positions. The number of cutting blades 32 provided on the log saw 31 is not particularly limited. The log saw 31 may be provided with multiple cutting blades 32 that revolve around the same revolution axis A3. Furthermore, in the cutting part 30, multiple log saws 31 may be arranged side by side along the axial direction of the log 5.

[0022] The log 5 is fed into the log saw 31 with its axial direction extending parallel to the rotation axis A2 and revolution axis A3 of the cutting blade 32, and is set on the orbit of the revolving cutting blade 32. The log 5 is then cut (sliced ​​into rings) along its radial direction by the cutting blade 32, which rotates and revolves as described above. Furthermore, the log 5 is transported in the axial direction by a distance corresponding to the axial length of the product 3 while the cutting blade 32 makes one revolution around the revolution axis A3. In this way, the log saw 31 sequentially cuts the log 5 at different axial positions with the cutting blade 32, from one end 5b on the downstream side of the log 5 (hereinafter also referred to as the downstream end 5b) to the other end 5d on the upstream side (hereinafter also referred to as the upstream end 5d).

[0023] In the cutting part 30 of this embodiment, the axial conveyance of the log 5 and the cutting by the cutting blade 32 are repeated as described above, so that a predetermined number of products 3 are cut out from one log 5. Then, once the set number of products 3 have been cut out from the log 5, the products 3 are conveyed to the downstream packaging part 40, and the next log 5 is sent from the adjusting part 20 to the cutting part 30.

[0024] 3, the log 5 in this embodiment does not become the product 3 in its entirety, but rather its two axial ends, a downstream end 5b and an upstream end 5d, are cut off as ears 2 (log ears) that do not become the product 3. Here, the ears 2 are illustrated as having an axial length shorter than that of the product 3. The ears 2 are waste items that are discharged from the production line 4 after being cut from the log 5. Hereinafter, of the two ears 2 cut from a single log 5, one ear 2A cut from the downstream end 5b of the log 5 will be referred to as the first ear 2A, and the other ear 2B cut from the upstream end 5d of the log 5 will be referred to as the second ear 2B. In the process of cutting a single log 5 with the cutting blade 32, the first ear 2A is cut when the cutting blade 32 cuts the log 5 for the first time, and the second ear 2B is cut when the cutting blade 32 cuts the log 5 for the last time.

[0025] As shown in Figures 4(a) and (b), the side surfaces 34, 35 on both sides of the cutting blade 32 come into sliding contact with the cross section of the log 5 (the end surface of the product 3 or the end surface of the edge portion 2) when the log 5 is cut. The side surfaces 34, 35 here refer to a pair of surfaces facing in the thickness direction of the cutting blade 32. Hereinafter, the side surface 34 facing the downstream side will also be referred to as the "downstream surface 34," and the other side surface 35 facing the upstream side will also be referred to as the "upstream surface 35."

[0026] As shown in Figure 4(a), when cutting the first ear 2A, the downstream surface 34 slides against the end surface of the first ear 2A, and the upstream surface 35 slides against the end surface of the product 3. On the other hand, as shown in Figure 4(b), when cutting the second ear 2B, the upstream surface 35 slides against the end surface of the second ear 2B, and the downstream surface 34 slides against the end surface of the product 3. Furthermore, when cutting a portion of the log 5 other than the ear 2, both the downstream surface 34 and the upstream surface 35 slide against the end surface of the product 3.

[0027] [1-2-2. Oil Treatment Device] As shown in Figure 2, the oil treatment device 1 is incorporated into the cutting part 30. The oil treatment device 1 supplies oil to the cutting blade 32 of the log saw 31 in the cutting part 30 and also treats the oil supplied to the cutting blade 32. The oil treatment device 1 is equipped with an oil supply unit 6 that supplies oil to at least one of the side surfaces 34, 35 of the cutting blade 32, and a wiping unit 7 that wipes off the oil supplied by the oil supply unit 6 before it comes into contact with the product 3.

[0028] <Fueling Department> The oil supply unit 6 is provided at a position that does not interfere with the log 5, and supplies oil to at least one of the side surfaces 34, 35 when the cutting blade 32 is not in contact with the log 5. The oil supply unit 6 supplies oil, for example, on the opposite side (upper side in FIG. 2 ) of the position where the cutting blade 32 cuts the log 5, based on the revolution axis A3. The oil supplied to the side surfaces 34, 35 by the oil supply unit 6 has the function of improving the sharpness and smoothness of the cutting blade 32.

[0029] The oil supply unit 6 of this embodiment includes a first oil supply unit 6a that supplies oil to the downstream surface 34 and a second oil supply unit 6b that supplies oil to the upstream surface 35. Here, the first oil supply unit 6a and the second oil supply unit 6b are illustrated as injectors that are provided to face the side surfaces 34, 35, respectively, and that spray oil onto the side surfaces 34, 35. However, the method of supplying oil by the oil supply unit 6 is not limited to spraying as described above. The oil supply unit 6 may supply oil to the side surfaces 34, 35 by transferring oil from a roll provided to abut the side surfaces 34, 35, or by allowing oil to seep out from pores formed in the side surfaces 34, 35.

[0030] The oil supply unit 6 of this embodiment supplies oil to the side surfaces 34, 35 within a predetermined oil supply period. The predetermined oil supply period includes a first period T1, which is the revolution period during which the cutting blade 32 cuts the edge portion 2, and a second period T2, which is a log replacement period (paper material replacement period) from the completion of cutting the log 5 into products 3 to the start of cutting the next log 5 into products 3. Specifically, the first period T1 is a period that extends back from the time when the cutting blade 32 completes cutting of the selvage 2 to the time when the cutting blade 32 makes one revolution around the revolution axis A3. In other words, the first period T1 includes the time when the cutting blade 32 goes out of contact with the log 5 immediately before cutting the selvage 2. Note that the first period T1 can be detected, for example, by detecting the axial position of the log 5 relative to the cutting blade 32 or the number of cuts made by the cutting blade 32 on one log 5 using a known sensor.

[0031] During the first period T1, the oil supply unit 6 supplies oil to one of the side surfaces 34, 35 that is located on the side of the ear 2 that is being cut by the cutting blade 32. Specifically, as shown in FIG. 5(a), during the revolution cycle in which the cutting blade 32 cuts the first ear 2A, the oil supply unit 6 supplies oil from the first oil supply unit 6a to the downstream surface 34 that is located on the side of the first ear 2A (downstream side). Also, as shown in FIG. 5(b), during the revolution cycle in which the cutting blade 32 cuts the second ear 2B, the oil supply unit 6 supplies oil from the second oil supply unit 6b to the upstream surface 35 that is located on the side of the second ear 2B (upstream side).

[0032] On the other hand, the second period T2 is specifically a period during which no log 5 is set on the log saw 31. That is, the second period T2 is a period during which the cutting blade 32 continues to revolve (i.e., idling or hitting) without coming into contact with the log 5. In this embodiment, the cutting blade 32 revolves multiple times (multiple revolutions) during the second period T2.

[0033] As shown in Fig. 6, the oil supply unit 6 supplies oil to both side surfaces 34, 35 during the second period T2. For example, the oil supply unit 6 simultaneously supplies oil to the side surfaces 34, 35 from the first oil supply unit 6a and the second oil supply unit 6b during the second period T2. Alternatively, the oil supply unit 6 may supply oil to the side surfaces 34, 35 from the first oil supply unit 6a and the second oil supply unit 6b at different times within the second period T2. The oil supply unit 6 of this embodiment supplies oil to both side surfaces 34, 35 during the first revolution cycle of the cutting blade 32 during the second period T2 (during the first idling and initial striking).

[0034] Furthermore, in order to avoid excessive oil supply to the side surfaces 34, 35, the oil supply unit 6 of this embodiment does not supply oil throughout the first period T1 and the second period T2, but instead supplies oil again after the oil has been wiped off by the wiping unit 7 and a predetermined number of products 3 have been cut. In other words, the supply of oil to the side surfaces 34, 35 by the oil supply unit 6 is prohibited during a third period T3, from the time the oil on the side surfaces 34, 35 is wiped off by the wiping unit 7 until the predetermined number of products 3 have been cut. The predetermined number that defines the third period T3 is, for example, an integer multiple of the number of products 3 to be cut from one log 5 (set number).

[0035] In this way, oil supply unit 6 supplies oil to side surfaces 34, 35 at intervals of at least third period T3. In this embodiment, oil supply unit 6 again supplies oil to at least one of side surfaces 34, 35 during the first first period T1 or second period T2 after third period T3 has elapsed.

[0036] For example, if the third period T3 has elapsed while the product 3 is being cut (excluding the period during which the selvage 2 is being cut), the oil supply unit 6 will supply oil to the upstream surface 35 of the cutting blade 32 during the next first period T1 when the second selvage 2B is being cut. The oil supply unit 6 will then wait (not supply oil) during the subsequent second period T2, and supply oil to the downstream surface 34 of the cutting blade 32 during the next first period T1 when the first selvage 2A is being cut. On the other hand, if the third period T3 has elapsed during the first period T1 when the second selvage 2A is being cut and the log 5 is being replaced, the oil supply unit 6 will wait (not supply oil) during the subsequent second period T2, and supply oil to the downstream surface 34 of the cutting blade 32 during the next first period T1 when the first selvage 2A is being cut. The oil supply unit 6 will then wait (not supply oil) during the subsequent first period T1 when the product 3 is being cut (excluding the period during which the selvage 2 is being cut), and supply oil to the upstream surface 35 of the cutting blade 32 during the next first period T1 when the second selvage 2B is being cut. In addition, the timing at which the oil supply unit 6 supplies oil after the third period T3 has elapsed may be the first second period T2 after the third period T3 has elapsed, instead of or in addition to the first period T1 as described above.

[0037] <Wiping part> As shown in Fig. 2, wiping unit 7 uses cleaning material 8 other than product 3 to wipe away excess oil adhering to side surfaces 34, 35. Cleaning material 8 is preferably made of a flexible material with oil absorption properties to ensure ease of wiping off oil and cushioning against side surfaces 34, 35. In this embodiment, the above-mentioned ear portion 2 is provided as cleaning material 8 for wiping away oil supplied by oil supply unit 6 during first period T1, and oil-absorbing material 8A is provided as cleaning material 8 for wiping away oil supplied by oil supply unit 6 during second period T2.

[0038] 5(a) and 5(b), the cleaning material 8 that wipes away the oil supplied during the first period T1 is the edge portion 2 that is cut off by the cutting blade 32 during the first period T1. That is, the wiping portion 7 wipes away the oil that has been supplied to the side surfaces 34 and 35 during the first period T1 with the edge portion 2 as the edge portion 2 is cut off by the cutting blade 32.

[0039] The wiping section 7 of this embodiment includes a first wiping section 7A that wipes away oil supplied to the downstream surface 34 by the first oil supply section 6a with the first ear 2A as the first ear 2A is cut, and a second wiping section 7B that wipes away oil supplied to the upstream surface 35 by the second oil supply section 6b with the second ear 2B as the second ear 2B is cut. The first wiping section 7A and the second wiping section 7B are formed, for example, by a base (not shown) that supports the ear 2 (cleaning material 8) when the ear 2 is cut.

[0040] As shown in FIG. 5(a), the first wiping portion 7A wipes away oil supplied from the first oil supply portion 6a to the downstream surface 34 during the first period T1 with the first ear 2A, which comes into sliding contact with the downstream surface 34 when the first ear 2A is cut by the cutting blade 32. On the other hand, as shown in FIG. 5(b), the second wiping portion 7B wipes away oil supplied from the second oil supply portion 6b to the upstream surface 35 during the first period T1 with the second ear 2B, which comes into sliding contact with the upstream surface 35 when the second ear 2B is cut by the cutting blade 32. In this way, the wiping portion 7 of this embodiment wipes away oil supplied to the side surfaces 34, 35 located on the ear 2 side with the ear 2, which serves as the cleaning material 8, simultaneously with cutting the ear 2.

[0041] As shown in FIGS. 2 and 6, the cleaning material 8 that wipes away the oil supplied in the second period T2 is an oil-absorbing material 8A that is different from the log 5. That is, the oil-absorbing material 8A is provided as a separate member from the log 5 that is cut into the product 3 and the edge 2. Here, the oil-absorbing material 8A is exemplified as a member that is different from the log 5 (it does not become the product 3), but is made of paper wound into a roll like the log 5. Note that, for example, logs 5 that are waste materials discharged from the production line 4 due to some kind of abnormality, or edge 2 that are waste materials generated during the production process of the product 3, can be used as such oil-absorbing material 8A.

[0042] The oil absorbent material 8A is provided at a position where it does not interfere with the log 5, and wipes off oil from the side surfaces 34, 35 when the cutting blade 32 is not in contact with the log 5. Specifically, the oil absorbent material 8B is provided at two locations: a position where it contacts the downstream surface 34 of the cutting blade 32, and a position where it contacts the upstream surface 35 of the cutting blade 32. Here, a pair of oil absorbent materials 8A is shown as an example, which are arranged within the range where the revolving cutting blade 32 moves from when oil is supplied by the oil supply unit 6 until it cuts the log 5 (on the trajectory of the cutting blade 32).

[0043] The pair of oil-absorbing materials 8A are arranged to face each other in the thickness direction of the cutting blade 32, with a gap smaller than the dimension of the cutting blade 32 in the thickness direction. The oil-absorbing materials 8A come into contact with the side surfaces 34, 35 every time the cutting blade 32 revolves. As a result, the oil-absorbing materials 8A wipe oil from the side surfaces 34, 35 according to the number of revolutions of the cutting blade 32. Note that the oil-absorbing materials 8A, which come into contact with the side surfaces 34, 35 every time the cutting blade 32 revolves in this way, wipe oil from the side surfaces 34, 35 not only in the second period T2 but also in the first period T1.

[0044] For the oil supplied during the second period T2, the wiping unit 7 wipes the oil off both of the side surfaces 34, 35 during the second period T2 (log replacement period) with the oil absorbent material 8A. Specifically, during the second period T2, the wiping unit 7 wipes off the oil on the downstream surface 34 with one (downstream) oil absorbent material 8A that is placed so as to contact the downstream surface 34, and wipes off the oil on the upstream surface 35 with the other (upstream) oil absorbent material 8A that is placed so as to contact the upstream surface 35.

[0045] In this embodiment, since the cutting blade 32 revolves multiple times during the second period T2 as described above, the wiping unit 7 wipes off the oil with the oil-absorbing material 8A multiple times during the second period T2, corresponding to the number of revolutions of the cutting blade 32, after the oil supply unit 6 supplies oil during the second period T2. Furthermore, the wiping unit 7 of this embodiment also wipes off the oil supplied during the first period T1 with the oil-absorbing material 8A, which comes into contact with the side surfaces 34, 35, each time the cutting blade 32 revolves. However, when wiping with the edge 2 is performed, the end surface (cross section) of the edge 2 of the cleaning material 8 is pressed firmly against the side surfaces 34, 35, compared to wiping with the oil-absorbing material 8A without cutting the edge 2, resulting in improved oil wiping performance. The oil-absorbing material 8A is not limited to being pre-fixed in a position in contact with the side surfaces 34, 35, but may be provided with an adjustable (movable) position, for example, to more appropriately and reliably contact the side surfaces 34, 35.

[0046] [2. Method] 7, processes (manufacturing processes) corresponding to the above-mentioned parts are carried out on the production line 4. Specifically, on the production line 4, a log forming process S10, an adjusting process S20, a cutting process S30, a packaging process S40, and a boxing process S50 are carried out in this order. In each of the above steps, processing is performed by a device in which the "step" in the name is replaced with "part." For example, in the log formation step S10, processing is performed by the log formation part 10, and in the adjustment step S20, processing is performed by the adjustment part 20.

[0047] The oil treatment method according to this embodiment is used in the cutting step S30 and is performed by the oil treatment device 1. The oil treatment method includes an oil supplying step S1 performed by the oil supply unit 6 and a wiping step S2 performed by the wiping unit 7. In the oiling process S1, oil is supplied to at least one of the side surfaces 34, 35 on both sides of the cutting blade 32. As described above, in the oiling process S1 of this embodiment, oil is supplied to both the side surfaces 34, 35. On the other hand, in the wiping process S2, the oil supplied to the side surfaces 34, 35 in the oiling process S1 is wiped off from the side surfaces 34, 35 with a cleaning material 8 other than the product 3 before the oil comes into contact with the product 3.

[0048] In the cutting step S30 of this embodiment, the log 5 is cut into a plurality of products 3 by the cutting blade 32, which rotates and revolves as described above. As shown in FIG. 8 , in the cutting step S30, first, the first ear 2A, which is the downstream end 5b of the fed log 5, is cut by the cutting blade 32 (step S31). Next, as the cutting blade 32 revolves, the log 5 is cut into a plurality of products 3 (step S32). Then, when the set number of products 3 have been cut from the log 5, the second ear 2B, which is the upstream end 5d of the log 5, is cut by the cutting blade 32 (step S33). This completes the cutting of the log 5 into products 3.

[0049] Next, the log 5 to be cut is replaced in the log saw 31 (step S34). Specifically, the products 3 cut from the log 5 are sent to the downstream packaging process S40, and the edge portions 2 cut from the log 5 are discharged from the production line 4, and the next log 5 is set in the log saw 31. Then, in the log saw 31, the above steps S31 to S34 are repeated again.

[0050] The oil supplying process S1 supplies oil to the sides 34, 35 located on the ear portion 2 side during a first period T1 in which the above-mentioned steps S31 and S33 are performed. The oil supplying process S1 of this embodiment includes a first oil supplying process S11 performed by the first oil supplying unit 6a during the first period T1 in which the above-mentioned step S31 is performed, and a second oil supplying process S12 performed by the second oil supplying unit 6b during the first period T1 in which the above-mentioned step S33 is performed.

[0051] In the first oil supply step S11, oil is supplied from the first oil supply part 6a to the downstream surface 34 located on the side of the first ear 2A during the revolution cycle in which the cutting blade 32 cuts the first ear 2A. Meanwhile, in the second oil supply step S12, oil is supplied from the second oil supply part 6b to the upstream surface 35 located on the side of the second ear 2B during the revolution cycle in which the cutting blade 32 cuts the second ear 2B.

[0052] In the wiping step S2 of this embodiment, with respect to the oil supplied to the side surfaces 34, 35 during the first period T1, the oil on the side surfaces 34, 35 is wiped away by the edge portions 2 serving as the cleaning material 8 as the cutting blade 32 cuts off the edge portions 2. The wiping step S2 includes a first wiping step S21 performed by the first wiping unit 7A on the oil supplied in the first oil supply step S11, and a second wiping step S22 performed by the second wiping unit 7B on the oil supplied in the second oil supply step S12.

[0053] In the first wiping step S21, the oil supplied to the downstream surface 34 in the first oil supply step S11 during the first period T1 is wiped away by the first lug 2A as the first lug 2A is cut. Meanwhile, in the second wiping step S22, the oil supplied to the upstream surface 35 in the second oil supply step S12 during the first period T1 is wiped away by the second lug 2B as the second lug 2B is cut.

[0054] In the oil supplying step S1, during the second period T2 in which the above-described step S34 is performed, oil is supplied to both side surfaces 34, 35 by the oil supply unit 6. In the oil supplying step S1 of this embodiment, oil is supplied from the oil supply unit 6 to both side surfaces 34, 35 during the first revolution of the cutting blade 32 in the second period T2. In the wiping step S2, during the second period T2, the oil supplied to both side surfaces 34, 35 in the oil supplying step S1 is wiped away with oil absorbent material 8A as cleaning material 8. In the wiping step S2 of this embodiment, during the second period T2, after the oil supplying step S1 is performed, the oil is wiped away with oil absorbent material 8A multiple times corresponding to the number of revolutions of the cutting blade 32.

[0055] In this embodiment, the oiling process S1 is performed again after the wiping process S2 has been performed and a predetermined number of products 3 or more have been cut. That is, the oiling process S1 is prohibited from being performed during the above-mentioned third period T3. In this embodiment, the oiling process S1 is performed again in the first first period T1 or second period T2 after the third period T3. Note that FIG. 8 shows an example in which the oiling process S1 (first oiling process S11 and second oiling process S12) and the wiping process S2 (first wiping process S21 and second wiping process S22) are both performed in the first period T1, and then the oiling process S1 and the wiping process S2 are performed again in the first second period T2 after the third period T3 has elapsed.

[0056] However, as shown in Figure 9, the oiling step S1 and the wiping step S2 are preferably performed during the first period T1 after the third period T3 has elapsed. Figure 9 illustrates a case where the third period T3 elapses during cutting of the product 3 (excluding cutting of the selvage 2). In this case, during the first period T1 after the third period T3 has elapsed and in which the second selvage 2B is cut, the oiling step S1 and the wiping step S2 are sequentially performed on the upstream surface 35 of the cutting blade 32. Then, after the subsequent second period T2 has elapsed, during the next first period T1 in which the first selvage 2A is cut, the oiling step S1 and the wiping step S2 are sequentially performed on the downstream surface 34 of the cutting blade 32. Note that the oiling step S1 and the wiping step S2 may be performed during both the first period T1 and the first second period T2 after the third period T3 has elapsed.

[0057] [3. Actions and Effects] (1) In the oil processing device 1 and oil processing method described above, oil supplied to at least one of the side surfaces 34, 35 of the cutting blade 32 is wiped off with the cleaning material 8 before the oil comes into contact with the product 3. Therefore, while oil is being supplied to the cutting blade 32, excess oil adhering to the side surfaces 34, 35 can be removed with the cleaning material 8 together with dirt such as paper powder adhering to the side surfaces 34, 35 before the oil comes into contact with the product 3. Therefore, while the oil improves the sharpness and smoothness of the cutting blade 32, it is possible to prevent oil and dirt from adhering to the product 3 from the side surfaces 34, 35. This improves the quality of the product 3 made by cutting paper material.

[0058] (2) When oil is wiped off using the edge 2 as it is cut by the revolving cutting blade 32, excess oil and dirt adhering to the side surfaces 34, 35 can be properly removed from the side surfaces 34, 35 by the shear force generated during cutting. That is, wiping that involves cutting the edge 2 more reliably removes excess oil and dirt from the side surfaces 34, 35 due to the shear force acting between the end surface (cross section) of the edge 2 and the side surfaces 34, 35, compared to wiping that does not involve cutting (e.g., wiping with oil-absorbing material 8A). Furthermore, by using the edge 2, which does not become the product 3, as the cleaning material 8, it is possible to reduce costs and save space while maintaining the oil absorbency of the cleaning material 8, compared to providing a cleaning material 8 dedicated to wiping separately from the edge 2.

[0059] (3) In the oil treatment device 1 and oil treatment method described above, oil supplied to the downstream surface 34 during the revolution cycle (the first period T1) for cutting the first ear 2A is wiped off by the first ear 2A as the first ear 2A is cut, and oil supplied to the upstream surface 35 during the revolution cycle for cutting the second ear 2B is wiped off by the second ear 2A as the second ear 2B is cut. This configuration allows excess oil and dirt to be appropriately removed from the side surfaces 34 and 35 of the log 5 by utilizing the first ear 2A and the second ear 2B, which are the ends 5b and 5d on both sides of the log 5. This further improves the quality of the product 3 while reducing costs and saving space.

[0060] (4) In the oil processing device 1 and oil processing method described above, oil supplied to both side surfaces 34, 35 during the log replacement period (the second period T2 described above) is wiped off with the oil absorbent material 8A during the log replacement period. By using the log replacement period to supply oil to the cutting blade 32 and wipe off excess oil and dirt, the manufacturing efficiency of the product 3 can be improved compared to, for example, temporarily stopping the operation of the log saw 31 or the transport of the log 5 to supply oil to and wipe off the cutting blade 32. Furthermore, by using the log replacement period, during which the cutting blade 32 is not cutting the log 5 as described above, it becomes easy to simultaneously supply oil to and wipe off both side surfaces 34, 35 without the cutting blade 32 touching the product 3. This saves time compared to alternately supplying and wiping off oil from both side surfaces 34, 35 (one side at a time). This also improves the manufacturing efficiency of the product 3.

[0061] (5) Supplying oil to both side surfaces 34, 35 during the first revolution of the cutting blade 32 during the log replacement period (i.e., the first blank strike) increases the likelihood that oil supply and wiping off of each side surface 34, 35 will be completed within the log replacement period. Furthermore, supplying oil to both side surfaces 34, 35 in this manner promptly after the log replacement period begins makes it easier to ensure time within the log replacement period for wiping off the oil from each side surface 34, 35. This makes it easier to more reliably remove excess oil and dirt adhering to the side surfaces 34, 35. This further improves the quality of the product 3.

[0062] (6) If, during the log replacement period, after supplying oil to the side surfaces 34, 35, the oil is wiped off with the oil absorbent material 8A multiple times according to the number of revolutions of the cutting blade 32, excess oil and dirt adhering to the side surfaces 34, 35 can be more reliably removed. Therefore, the quality of the product 3 can be more reliably improved.

[0063] (7) If oil is supplied to the sides 34, 35 again after a predetermined number of products 3 have been cut after the oil has been wiped off, the interval between the repeated supply of oil to the sides 34, 35 and the wiping can be set to at least the third period T3. This prevents excessive oil supply to the sides 34, 35 and excessive wiping. Therefore, while the oil improves the sharpness and smoothness of the cutting blade 32, it is possible to prevent oil and dirt from adhering to the products 3 from the sides 34, 35 and to suppress excessive oil consumption. This improves the quality of the products 3 and reduces oil costs.

[0064] [4. Modifications] The above-mentioned refueling periods are merely examples. The oil supply at the refueling unit 6 and in the refueling process S1 may be performed, for example, during only one of the first period T1 and the second period T2, or during a period other than the first period T1 and the second period T2. Furthermore, the oil supply at the refueling unit 6 and in the refueling process S1 may be repeated at intervals shorter than the third period T3, or may be repeated at intervals other than the third period T3.

[0065] The oil supply unit 6 and the oil supply process S1 may supply oil only to one of the side surfaces 34, 35. For example, the oil supply unit 6 and the oil supply process S1 may supply oil only to the downstream surface 34, and not to the upstream surface 35. In this case, the wiping unit 7 and the wiping process S2 only need to wipe oil from the downstream surface 34, and there is no need to wipe oil from the upstream surface 35. Even in such a case, the oil supplied to at least one of the side surfaces 34, 35 can improve the sharpness and smoothness of the cutting blade 32, and can prevent oil and dirt from adhering to the product 3 from at least one of the side surfaces 34, 35.

[0066] The configuration of the cutting part 30 and the cutting process S30 is not limited to the above example. For example, the cutting part 30 and the cutting process S30 may use a cutting blade 32 that does not revolve. When multiple cutting blades 32 are provided, it is preferable to supply oil to and wipe off each cutting blade 32 using the oil treatment device 1 and oil treatment method described above. For example, when the log saw 31 is provided with two cutting blades 32 that revolve around the same revolution axis A3, the number of times (number of passes) N that the cutting blade 32 passes the position where the log 5 is set between the start of cutting one log 5 and the start of cutting the next log 5 can be set to an odd number. This number of passes N includes not only the number of times (number of cuts) that the cutting blade 32 cuts the log 5 set on its path, but also the number of times (number of misses) that the cutting blade 32 passes the position where the log 5 is set during a log replacement period when no log 5 is set on the path of the cutting blade 32. In the log saw 31 provided with two cutting blades 32, each time one cutting blade 32 rotates around the revolution axis A3, the number of passes N is counted as two.

[0067] In this way, by setting the number of passes N to an odd number and then performing the above-mentioned first oiling step S11, first wiping step S21, second oiling step S12, and second wiping step S22 on two consecutive logs 5, it is possible to improve the sharpness and smoothness of each cutting blade 32 as described above while preventing oil and dirt from adhering to the product 3. Therefore, when multiple cutting blades 32 are provided, the quality of the product 3 can be more reliably improved.

[0068] It is expected that most of the dirt adhering to the side surfaces 34, 35 of the cutting blade 32 is grinding powder from the cutting blade 32. Therefore, if the timing of performing the oil treatment method described above is synchronized with the grinding of the cutting blade 32, it is possible to effectively remove dirt from the side surfaces 34, 35. For example, the cutting blade 32 may be ground within the first period T1 or the second period T2, and then the oiling step S1 and the wiping step S2 may be performed in this order.

[0069] More specifically, the upstream surface 35 of the cutting blade 32 may be sharpened during the first period T1 in which the second ear 2B is cut, and the oiling process S1 and wiping process S2 may be sequentially performed on the upstream surface 35 during this first period T1, the subsequent second period T2, or the next first period T1 in which the first ear 2A is cut. Alternatively, the downstream surface 34 of the cutting blade 32 may be sharpened during the first period T1 in which the first ear 2A is cut, and the oiling process S1 and wiping process S2 may be sequentially performed on the downstream surface 34 during this first period T1. Furthermore, the sharpening of both side surfaces 34, 35 of the cutting blade 32, as well as the oiling process S1 and wiping process S2, may all be performed during the second period T2, which is the log replacement period. Thus, it is preferable to perform the sharpening of the cutting blade 32 and the oiling process S1 and wiping process S2 during a period in which the cutting blade 32 is not cutting the product 3. Furthermore, from a disaster prevention perspective, it is desirable not to perform the sharpening of the cutting blade 32 and the oiling process S1 simultaneously. The object to be cut by the cutting blade 32 is not limited to the log 5 described above, and may be any paper material that can be cut into a plurality of products.

[0070] [5. Notes] The following additional notes are provided regarding the above-described embodiments. (Appendix 1) An oil treatment method used in a cutting process in which paper material is cut into multiple products with a cutting blade, comprising: an oil supplying step of supplying oil to at least one of both side surfaces of the cutting blade; a wiping step of wiping off the oil supplied to the side surface with a cleaning material other than the product before the oil comes into contact with the product. An oil treatment method characterized by: (Appendix 2) In the cutting step, the paper material is cut into a plurality of products by the revolving cutting blade, The oil supplying step supplies the oil to the side surface located on the side of the edge portion during a revolution cycle in which the cutting blade cuts the edge portion, which is an end portion of the paper material and does not become the product, The wiping step includes wiping off the oil supplied to the side surface located near the edge portion with the edge portion as a cleaning material when the edge portion is cut by the cutting blade. 2. The oil treatment method according to claim 1, (Appendix 3) The oiling process includes a first oiling process of supplying the oil to one of the side surfaces located on the side of the first ear portion in a revolution cycle in which the cutting blade cuts the first ear portion, which is one of the ends of the paper material, and a second oiling process of supplying the oil to the other of the side surfaces located on the side of the second ear portion in a revolution cycle in which the cutting blade cuts the second ear portion, which is the other end of the paper material, The wiping step includes a first wiping step of wiping off the oil supplied to the side surface in the first oiling step with the first ear portion as the cleaning material, as the cutting blade cuts off the first ear portion, and a second wiping step of wiping off the oil supplied to the side surface in the second oiling step with the second ear portion as the cleaning material, as the cutting blade cuts off the second ear portion. 3. The oil treatment method according to claim 2, (Appendix 4) The oil supplying step supplies the oil to both side surfaces during a paper material replacement period from when cutting of the paper material into the products is completed until cutting of the next paper material into the products is started, The wiping step involves wiping off the oil supplied to both side surfaces with an oil-absorbing material serving as the cleaning material, which is different from the paper material, during a paper material replacement period. 4. The oil treatment method according to any one of claims 1 to 3, (Appendix 5) In the cutting step, the paper material is cut into a plurality of products by the revolving cutting blade, The oil supplying step supplies the oil to both side surfaces of the cutting blade at the first revolution of the cutting blade during the paper material replacement period. 5. The oil treatment method according to claim 4, (Appendix 6) The wiping step is a step of wiping off the oil with the oil absorbent material a number of times corresponding to the number of revolutions of the cutting blade after the oil supply step is performed during the paper material replacement period. 6. The oil treatment method according to claim 5, (Appendix 7) The oiling step is carried out again after a predetermined number of the products have been cut since the wiping step was carried out. 7. The oil treatment method according to any one of claims 1 to 6, (Appendix 8) An oil treatment device incorporated into a cutting part that cuts paper material into multiple products with a cutting blade, an oil supply unit that supplies oil to at least one of both side surfaces of the cutting blade; and a wiping unit that wipes off the oil supplied to the side surface with a cleaning material other than the product before the oil comes into contact with the product. An oil treatment device characterized by: (Appendix 9) In the cutting part, the paper material is cut into a plurality of products by the revolving cutting blade, the oil supply unit supplies the oil to the side surface located on the side of the edge portion during a revolution cycle in which the cutting blade cuts the edge portion, which is an end portion of the paper material and does not become the product; The wiping unit wipes away the oil supplied to the side surface located on the side of the ear portion when the ear portion is cut by the cutting blade, with the ear portion serving as the cleaning material. 9. The oil treatment device according to claim 8, (Appendix 10) The oil supply unit includes a first oil supply unit that supplies the oil to one of the side surfaces located on the side of the first ear portion during a revolution cycle in which the cutting blade cuts the first ear portion, which is one of the ends of the paper material, and a second oil supply unit that supplies the oil to the other of the side surfaces located on the side of the second ear portion during a revolution cycle in which the cutting blade cuts the second ear portion, which is the other end of the paper material, The wiping section includes a first wiping section that wipes away the oil supplied to the side surface by the first oil supply section with the first ear section as the cleaning material when the first ear section is cut by the cutting blade, and a second wiping section that wipes away the oil supplied to the side surface by the second oil supply section with the second ear section as the cleaning material when the second ear section is cut by the cutting blade. 10. The oil treatment device according to claim 9, (Appendix 11) the oil supply unit supplies the oil to both side surfaces during a paper material replacement period from when cutting of the paper material into the products is completed until cutting of the next paper material into the products is started; The wiping unit wipes away the oil supplied to both side surfaces with an oil-absorbing material serving as the cleaning material different from the paper material during a paper material replacement period. 11. The oil processing device according to any one of appendices 8 to 10. (Appendix 12) In the cutting part, the paper material is cut into a plurality of products by the revolving cutting blade, The oil supply unit supplies the oil to both side surfaces at the first revolution of the cutting blade in the paper material replacement period. 12. The oil treatment device according to claim 11, (Appendix 13) The wiping unit wipes off the oil with the oil absorbent material a number of times corresponding to the number of revolutions of the cutting blade after the oil supply unit supplies the oil during the paper material replacement period. 13. The oil treatment device according to claim 12. (Appendix 14) The oil supply unit supplies the oil again after the oil has been wiped off by the wiping unit and a predetermined number or more of the products have been cut. 14. The oil processing device according to any one of appendices 8 to 13, [Explanation of symbols]

[0071] 1 Oil treatment equipment 2 ears 2A First ear 2B Second ear 3 products 4 Production Lines 5 Logs (paper materials) 5a End of winding 5b Downstream end (one end) 5c Core 5d Upstream end (other end) 6. Fuel Station 6a First Refueling Station 6b Second Refueling Station 7 Wiping part 7A First wiping section 7B Second wiping section 8 Cleaning materials 8A oil absorbing material 10 Log formation part 11 Base paper (materials) 12 Raw roll 13 Winder 14 Glue part 19 Opening 20 Adjustment Part 21 Accumulator 22 Packaging bag 23 Cardboard Box 30 Cutting Part 31 Log saw 32 Cutting blade 33 Support arm 34 Downstream surface (side) 35 Upstream surface (side) 36 Center 40 Packaging Section 50 Packing Part A2 Rotation axis (rotation axis of cutting blade 32) A3 revolution axis (rotation axis of support arm 33) T1 First period (revolution period during which the cutting blade 32 cuts the edge portion 2) T2 Second period (log [paper] replacement period) T3 Third Period

Claims

1. An oil treatment method used in a cutting process in which paper material is cut into multiple products with a cutting blade, comprising: an oil supplying step of supplying oil to at least one of both side surfaces of the cutting blade; a wiping step of wiping off the oil supplied to the side surface with a cleaning material other than the product before the oil comes into contact with the product, In the cutting step, the paper material is cut into a plurality of products by the revolving cutting blade, the oiling step includes supplying the oil to the side surface located on the side of the edge portion, while not supplying the oil to the side surface located on the opposite side of the edge portion, during a revolution cycle in which the cutting blade cuts the edge portion, which is an end portion of the paper material and does not become the product; The wiping step includes wiping off the oil supplied to the side surface located near the edge portion with the edge portion as a cleaning material when the edge portion is cut by the cutting blade. An oil treatment method characterized by:

2. The oiling process includes a first oiling process of supplying the oil to one of the side surfaces located on the side of the first ear portion in a revolution cycle in which the cutting blade cuts the first ear portion, which is one of the ends of the paper material, and a second oiling process of supplying the oil to the other of the side surfaces located on the side of the second ear portion in a revolution cycle in which the cutting blade cuts the second ear portion, which is the other end of the paper material, The wiping step includes a first wiping step of wiping off the oil supplied to the side surface in the first oiling step with the first ear portion as the cleaning material, as the cutting blade cuts off the first ear portion, and a second wiping step of wiping off the oil supplied to the side surface in the second oiling step with the second ear portion as the cleaning material, as the cutting blade cuts off the second ear portion.

2. The oil treatment method according to claim 1 .

3. The oil supplying step supplies the oil to both side surfaces during a paper material replacement period from when cutting of the paper material into the products is completed until cutting of the next paper material into the products is started, The wiping step involves wiping off the oil supplied to both side surfaces with an oil-absorbing material serving as the cleaning material, which is different from the paper material, during a paper material replacement period.

3. The oil treatment method according to claim 1 or 2.

4. In the cutting step, the paper material is cut into a plurality of products by the revolving cutting blade, The oil supplying step supplies the oil to both side surfaces of the cutting blade at the first revolution of the cutting blade during the paper material replacement period.

4. The oil treatment method according to claim 3.

5. The wiping step is a step of wiping off the oil with the oil absorbent material a number of times corresponding to the number of revolutions of the cutting blade after the oil supply step is performed during the paper material replacement period.

5. The oil treatment method according to claim 4.

6. The oiling step is carried out again after a predetermined number of the products have been cut since the wiping step was carried out.

3. The oil treatment method according to claim 1 or 2.

7. An oil treatment device incorporated into a cutting part that cuts paper material into multiple products with a cutting blade. 、 an oil supply unit that supplies oil to at least one of both side surfaces of the cutting blade; a wiping unit that wipes off the oil supplied to the side surface with a cleaning material other than the product before the oil comes into contact with the product; In the cutting part, the paper material is cut into a plurality of products by the revolving cutting blade, the oil supply unit supplies the oil to the side surface located on the side of the edge portion, and does not supply the oil to the side surface located on the opposite side of the edge portion, during a revolution cycle in which the cutting blade cuts the edge portion, which is an end portion of the paper material and does not become the product; The wiping unit wipes away the oil supplied to the side surface located on the side of the ear portion when the ear portion is cut by the cutting blade, with the ear portion serving as the cleaning material. An oil treatment device characterized by:

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