Continuous sheet cutting device and interfolder having continuous sheet cutting device

Abstract

To save labor for switching a web roll.SOLUTION: A continuous sheet cutting device, which cuts off a continuous sheet extending to a folding-back mechanism part of an inter-folder, comprises: a string-shaped body with an impregnating property which is facing a sheet passing path for one or a plurality of continuous sheets and is arranged across the sheet passing path; a movement path for the string-shaped body which crosses the sheet passing path for the continuous sheets; driving means that moves the string-shaped body to be reciprocatable in the movement path; and a porous elastic body having an impregnating property arranged on the movement path for the string-shaped body, which makes the string-shaped body contact the porous elastic body so that liquid is impregnated into the string-shaped body and makes the driving means press the string-shaped body impregnated with liquid against the continuous sheet positioned on the sheet passing path, so as to cut the continuous sheet.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a continuous sheet cutting device and a continuous sheet cutting method, and in particular to a continuous sheet cutting device that cuts a continuous sheet being unwound from a roll of continuous sheet, which is the base paper for household thin paper such as tissue paper, and an interfolder having this continuous sheet cutting device. [Background technology]

[0002] There are well-known products in which a bundle of multiple sheets of household thin paper, such as tissue paper, is folded and stacked and stored in a storage container, such as a storage box called a carton or a film packaging bag. In such products, when one sheet of sanitary thin paper is taken out from an opening provided in the storage container, the next sheet is successively pulled out from the opening.

[0003] To manufacture the bundles used in such products, folding equipment called interfolders is used. There are several types of interfolders, one of which is called a multi-stand type, stand type, folding plate type, or multi-row type.

[0004] This type of interfolder has a large number of folding mechanisms (e.g., 50 to 200) with folding plates arranged side by side in the direction of the line flow. Continuous sheets of the same width as the product width of the sanitary thin paper are supplied simultaneously from a roll of raw material to each folding mechanism, usually in sets of two sheets, and the continuous sheets are folded in each folding mechanism.

[0005] As the sheets are folded, the continuous sheets folded by the folding mechanism on the upstream side of the line are sequentially stacked on top of the continuous sheets folded by the folding mechanism on the downstream side, so that a continuous stack of sheets with the required number of sheets stacked is formed at the most downstream side.

[0006] In this type of interfolder, when the product type is changed or the remaining distance of the continuous sheet wound around the original roll becomes short, it is necessary to change each original roll leading to each of the numerous folding mechanisms (50 to 200 units) when changing the original roll.

[0007] Conventionally, this switching of raw rolls was performed by manually cutting the continuous sheet from the old raw roll, manually overlapping the continuous sheet from the next raw roll after the switch, and then manually crimping and joining the overlapped portions using a pneumatic tool such as an air chisel, air needle chisel, or jet chisel.

[0008] In this way, when switching between original rolls, the work of cutting the continuous sheet from the multiple original rolls that reach each folding mechanism was all done manually by human beings, requiring a great deal of time and effort, and impeding operational efficiency, safety, and labor savings. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] U.S. Patent No. 4,052,048 (JP Patent Publication No. 55-1215) [Patent Document 2] JP 2006-240750 A [Patent Document 3] JP 2011-121764 A [Patent Document 4] Japanese Patent Application Publication No. 60-249594 [Patent Document 5] Japanese Patent Application Publication No. 62-218367 Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, the object of the present invention is to provide a continuous sheet cutting device that can automate the cutting of a continuous sheet when changing raw fabric rolls in an interfolder, in particular, in order to achieve safety, labor savings, and improved operational efficiency when changing raw fabric rolls in an interfolder, and an interfolder having this continuous sheet cutting device. [Means for solving the problem]

[0011] The means for solving the above problems are as follows. The first means is, A device for cutting a continuous sheet leading to a folding mechanism of an interfolder, comprising: a liquid-impregnated or liquid-attachable string-shaped body that faces a paper-passing path of one or more continuous sheets and is arranged across the paper-passing path; a moving path of a string-like body that intersects a paper passing path of the continuous sheet; A driving means for reciprocatingly moving the string-like body within a moving path; a liquid-absorbent porous elastic body disposed in a path of movement of the string-like body; This continuous sheet cutting device is characterized in that it impregnates a string-like body with liquid by contacting it with a porous elastic body, and cuts the continuous sheet by pressing the liquid-impregnated string-like body against the continuous sheet located in the paper passage path using a driving means.

[0012] The second method is The continuous sheet cutting device according to the first means described above has a liquid supplying means for supplying liquid to the porous elastic body.

[0013] The third method is a receiving portion for receiving the continuous sheet at a position opposite to the porous elastic body across the sheet passage path; The continuous sheet cutting device according to the first or second means described above is configured so that the string-like body comes into contact with the continuous sheet in a state in which the continuous sheet is supported by the receiving portion.

[0014] The fourth measure is In the continuous sheet cutting device according to the first to third means, the porous elastic body has a curved convex surface at the contact portion with the string-like body toward the paper passage side.

[0015] The fifth measure is: The interfolder having a continuous sheet cutting device is characterized in that it comprises a plurality of the continuous sheet cutting devices according to the first to fourth means. Effect of the Invention

[0016] According to the present invention, in order to achieve safety, labor savings, and improved operational efficiency when switching raw material rolls in an interfolder, a continuous sheet cutting device capable of automating the cutting of a continuous sheet when switching raw material rolls is provided, and an interfolder having this continuous sheet cutting device is provided. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram of a stack of sanitary tissue paper to explain an interfolder. [Diagram 2] FIG. 1 is a schematic diagram of an interfolder. [Diagram 3] 2 is a side view showing an example of a folding plate mechanism and a continuous sheet cutting device. FIG. [Figure 4] FIG. 2 is a side view showing an example of a cutting device for a continuous sheet. [Diagram 5] FIG. 2 is a plan view showing an example of a continuous sheet cutting device. [Figure 6] 4A and 4B are diagrams for explaining cutting of a sheet by a continuous sheet cutting device. [Figure 7] 11 is another diagram for explaining cutting of the sheet by the continuous sheet cutting device. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The continuous sheet cutting device 20 according to this embodiment is provided in an interfolder 10 that produces stacks 1 that are mainly used for sanitary thin paper products.

[0019] Sanitary tissue paper products are made by storing a bundle 1 of sanitary tissue paper in a storage container such as a storage box called a carton or a film packaging bag. For example, when one set of sanitary tissue paper is removed from an opening provided in the storage container, the next set is successively pulled out from the opening.

[0020] As shown in Figure 1, a stack 1 of sanitary thin papers 2 is formed by folding a square piece of sanitary thin paper 2 in half, and stacking multiple pieces of sanitary thin paper 2 so that the folded inner side 2A of the folded piece has the folded back pieces 2B of other sanitary thin papers 2 located above and below it, and has a roughly rectangular shape with a pair of long sides 3B where the folded edges 2C of each piece of sanitary thin paper 2 are aligned, and a pair of short sides 3A where the folded edges 2C are not aligned, and a pair of flat surfaces (upper and lower sides) 3C connected to the short sides 3A and the long sides 3B.

[0021] 2 is a schematic diagram of an interfolder 10 according to this embodiment for manufacturing a stack 1 of sanitary thin paper 2. This interfolder 10 has a structure in which a plurality of folding mechanisms 10A each having a pair of folding plates 11, 11 are arranged in parallel in the line flow direction, for example, 80 to 150 units, and is also called a multi-stand type, stand type, folding plate type, multiple interfolder, etc. In the present invention and this specification, it is simply called an interfolder 10.

[0022] In this interfolder 10, the continuous sheets S1, S1 are sent to each folding plate 11, 11 of the folding mechanism unit 10A via appropriate rolls 12 such as guide rolls, expander rolls, and dancer rolls, and the ends of the continuous sheets S1, S1 are folded back while overlapping each other at each folding plate 11, 11. Furthermore, below the folding mechanism unit 10A, the continuous bundle 1A, which is stacked while being folded by the folding mechanism unit 10A on the more upstream side of the line, is positioned, and the continuous sheets S1, S1 folded by the folding mechanism unit 10A are stacked in association with this continuous bundle 1A. In this interfolder, the number of layers of the continuous bundle 1A increases from the upstream folding mechanism unit to the downstream folding mechanism unit, and the continuous bundle 1A is sent downstream by the conveyor. Then, the continuous bundle 1A is cut (cut) at a predetermined interval in the flow direction by a cutter or the like 14 at the rear of the most downstream folding mechanism unit 10A, and becomes individual bundles 1.

[0023] Therefore, in the folding mechanism 10A of this embodiment, the continuous sheets S1, S1 supplied to each folding plate 11, 11 become a single sheet of sanitary thin paper 2 after the continuous stack 1A is cut, so that the width of one folded continuous sheet S1 is the same as the width of one sheet of sanitary thin paper 2 that constitutes the stack 1 of sanitary thin paper 2.

[0024] The continuous sheet S1 to be supplied to the folding mechanism 10A is made of base paper of sanitary thin paper 2 in a form such as tissue paper when in use, and is supplied from a base roll 5 to the folding mechanism 10A.

[0025] The original roll 5 is a wound continuous sheet having a width equal to or multiple times the product width of the sanitary thin paper 2, and is rotatably attached to the original roll support part 13 of the interfolder 10. For example, if the continuous sheet fed from the original roll 5 is the same width as the product width of the sanitary thin paper 2, it is fed as is, but if it is equal to or larger than the product width, such as multiple times the product width of the sanitary thin paper, it is slit to the appropriate width of the sanitary thin paper and fed to the folding plate 11. The product width of the sanitary thin paper varies depending on the product type (such as tissue paper or paper towel) and the specifications (such as large or small), but is generally about 170 to 230 mm.

[0026] The interfolder 10 in the illustrated example has original roll support parts 13 in a number corresponding to the number of folding mechanisms 10A, and the original rolls 5, 5 are attached to the original roll support parts 13 in the form of an original roll unit 5A consisting of a set of two original rolls 5, 5 sharing one shaft 6. The original roll 5 has a continuous sheet S1 wound thereon that is the same width as the product width of the sanitary thin paper, and the continuous sheets S1, S1 of the product width are unwound from each original roll 5, 5.

[0027] However, the interfolder 10 according to the present invention is not limited to this form. As described above, the interfolder 10 may be configured such that the original roll 5 on which a continuous sheet of sanitary thin paper having a width equal to or greater than the product width is wound is attached to the original roll support section 13, and the continuous sheet of sanitary thin paper having a width equal to or greater than the product width unwound from the original roll 5 is slit into a continuous sheet S1 having the product width and then supplied to the folding plate. Furthermore, the folding operation of the continuous sheet S1 in the folding mechanism section 10A is not limited to this form.

[0028] Here, the device of the present invention is a device 20 that mechanically cuts the continuous sheet S1 from the original roll 5 to the folding mechanism unit 10A in an interfolder 10 of this type having a large number of folding mechanism units 10A, and is preferably installed in multiple units in the interfolder 10.

[0029] As shown particularly in Figures 3 to 5, this continuous sheet cutting device 20 has a string-like body 21 that can be impregnated with or adhered to liquid, a movement path 21R for this string-like body 21, a driving means 22 that moves the string-like body 21 back and forth within the movement path 21R, and a porous elastic body 23 that is disposed on the movement path 21R for the string-like body 21 and has liquid-absorbent properties for applying liquid to the string-like body 21.

[0030] The string-like body 21 faces the paper passage path L1 of one or more continuous sheets S1 and is arranged across the paper passage path L1. The material and structure of the string-like body 21 are not particularly limited as long as it is a flexible, elongated string and can sufficiently impregnate or adhere liquid. Examples of the material include a plurality of thin strings, short thin strings, a net string made of woven fibers, a net rope, a twisted string, a twisted rope, a cloth such as towel cloth cut into a string shape, and a synthetic resin material formed into a string shape with a large number of fine holes and grooves on the surface to give it impregnation. A preferable example is a synthetic resin material formed into a string shape with a large number of fine holes and grooves on the surface to give it impregnation, or a net string made of a plurality of thin strings or fibers woven together. The material constituting the string-like body is not limited. Examples of the material include synthetic resins such as polypropylene, polyethylene, polyvinyl chloride, and polyethylene terephthalate, and natural fiber materials such as cotton fiber and palm fiber. A synthetic resin material is particularly preferable. It is less stretched by liquid impregnation and has excellent corrosion resistance. There is no particular limitation on the thickness. If it is too thick, the cutting width becomes wide and much paper surface is wasted, so it is preferably 2 to 4 mm. There is no limitation on the cross-sectional shape of the string-like body 21. It may be any appropriate shape such as a circle, oval, square, or triangle.

[0031] The illustrated device 20 is configured so that the string-like body 21 straddles the paper passage paths L1, L1 through which two continuous sheets S1, S1 of the product width of the sanitary thin paper pass, but the width and number of the continuous sheets S1 straddled by the string-like body 21 are not necessarily limited. For example, it may be configured to straddle a continuous sheet of a width equal to or greater than the product width of the sanitary thin paper, or to straddle two or more continuous sheets regardless of width. However, since the interfolder 10 pays out the continuous sheet S1 from a large number of original rolls 5, it is not preferable to straddle the continuous sheets S1... from all original rolls 5, 5... at once. If the continuous sheets are about the same width as the product width of the sanitary thin paper, it is desirable to straddle the paper passage paths L1 for 10 sheets or less, preferably 6 sheets or less, more preferably 4 sheets or less, and especially 2 sheets. Also, it is preferable that the interfolder is configured to straddle the sheet path L1 of the continuous sheet S1 leading to one folding mechanism 10A or the sheet path L1 of the continuous sheet S1 leading to one folding plate 11. In the interfolder, maintenance may be required for each folding mechanism 10A or each folding plate 11, so cutting the continuous sheet S1 leading to the folding mechanism 10A or the folding plate 11 is preferable in terms of safety and labor saving when switching the original roll, and further improving operational efficiency. In addition, since most interfolders are configured so that the continuous sheet S1 leads from one original roll 5 or original roll unit 5A to the folding mechanism 10A, it is particularly preferable to configure the cord-like body 21 so that one or more continuous sheets S1 can be cut simultaneously for each folding mechanism 10A.

[0032] The movement path 21R of the string-like body 21 is a path along which the string-like body 21 moves while maintaining a predetermined tension, and this movement path 21R is arranged to cross the paper-passing paths L1, L1 of the continuous sheets S1, S1. Thus, by moving along the movement path 21R, the string-like body 21 comes into contact with both side edges of the continuous sheet S1 located on the paper-passing path L1 so as to bridge the two sides of the continuous sheet S1. The tension of the string-like body 21 is not necessarily limited. It is sufficient that the tension is not excessively loose. It is sufficient that the string-like body 21 is maintained approximately linearly.

[0033] The driving means for moving the string-like body 21 can be a known mechanism that can move the string-like body 21. A preferred example is a pair of cylinder mechanisms 22, 22 that are provided so as to protrude from both side edges of the paper passage path L1 at an outer position and can be expanded and contracted by a driving source such as a motor (not shown) as in the illustrated device. Examples of the cylinder mechanisms 22, 22 include hydraulic cylinders and air cylinders. Air cylinders are particularly preferable from the viewpoint of preventing contamination of sanitary thin paper. The string-like body 21 is bridged to the ends of these cylinders 22, 22, and the cylinders 22, 22 are synchronously expanded or contracted by a driving source, so that the string-like body 21 reciprocates along the movement path 21R while maintaining a predetermined tension. However, the driving means is not limited to the above cylinder mechanisms. For example, a mechanism in which a pair of guides such as rails are provided so as to protrude from both side edges of the sheet passage path L1 at an outer position, a moving body such as a pulley or a locking device is provided so as to be movable along the guide, and the moving body can be moved by a belt drive, a chain drive, or a cylinder drive can be exemplified. Note that the driving source of the driving means is not limited, and a known driving source such as an air pressure, an electric motor, or a magnetic motor can be used.

[0034] Moreover, in the present device 20, it is desirable that the string-like body 21 is replaceable. Therefore, it is desirable that the string-like body is attached to the driving means or a predetermined attachment part in a detachable manner. A known technique can be used for the replacement method. For example, a clamping part that can be narrowed and widened by a screw or the like may be provided on the cylinder or the moving body, so that the string-like body can be selected to be clamped or released. Also, the string-like body may be attached and detached by being engaged with an appropriate fixing jig such as a carabiner or a clip. Also, a part for tying the string-like body to the cylinder or the moving body may be formed, so that the string-like body is directly tied to the cylinder or the moving body. By making the string-like body replaceable, the maintenance is improved, and the thickness, material, and water content of the string-like body can be appropriately changed according to the thickness and quality of the continuous sheet S1 to be cut.

[0035] The porous elastic body 23 is disposed on a moving path 21R of the string-like body 21 that is separated from the paper passage path L1. Therefore, in this device 20, the string-like body 21 comes into contact with the porous elastic body 23 as the driving means 22 moves the string-like body 21. The illustrated continuous sheet cutting device 20 is configured to be able to move the moving path 21R by a pair of cylinder mechanisms 22, 22 to a position where the string-like body 21 comes into contact with the porous elastic body 23 and to a predetermined position that has passed through the paper passage path L1.

[0036] The contact between the string-like body 21 and the porous elastic body 23 may be such that the string-like body 21 presses against the porous elastic body 23 to the extent that the porous elastic body 23 is elastically deformed. The separation distance between the paper passage path L1 and the porous elastic body 23 is not limited, but it is preferable that the separation distance is such that the continuous sheet S1 passing through the paper passage path L1 does not come into contact with the porous elastic body 23. The separation distance may be 30 mm or more, and is preferably 50 to 90 mm.

[0037] The porous elastic body 23 is liquid-absorbent and can impart liquid to the string-like body 21 by contacting the string-like body. Specific materials for the porous elastic body 23 include, for example, sponge materials such as natural or synthetic resin spongy bodies. Fabrics or fiber materials may be elastically solidified with an adhesive. A synthetic resin sponge material is preferable because it is easy to adjust the liquid retention and is resistant to corrosion.

[0038] Furthermore, it is desirable that the porous elastic body 23 has an elongated shape, for example, so that it can contact the string-like body 21 over a range of 80% or more, and preferably 100% or more, of the length of the string-like body 21. In the illustrated device 20, the porous elastic body 23 is formed in an elongated shape facing the paper passage paths L1, L1 over a range of 100% or more at a position between a pair of cylinders 22, 22 which are the drive means for the string-like body 21.

[0039] On the other hand, it is particularly desirable that the contact side surface 23A of the porous elastic body 23 with the string-like body 21 is a curved convex surface that is convex toward the paper passage path L1 side and from each end side of the string-like body 21 toward the center side. When the string-like body 21 is moved toward the porous elastic body 23 by the driving means 22 such as a cylinder mechanism and brought into contact with the porous elastic body 23, even if the tension of the string-like body 21 is loosened or there is a slight difference in the moving distance at each end of the string-like body 21, the entire string-like body 21 is easily brought into contact with the porous elastic body 23, improving the reliability of applying the liquid from the porous elastic body 23 to the string-like body 21.

[0040] Furthermore, it is desirable that the curved convex surface 23A of the porous elastic body 23 is configured with two or more types of curvature, preferably two types of curvature as shown in FIG. 5. By configuring the curved convex surface 23A with two or more types of curvature, the extensive contact between the string-like body 21 and the porous elastic body 23 is more assured. The curvature of the curved convex surface 23A is not limited. It can be appropriately designed according to the width (width of the continuous sheet) and number of paper-passing paths L1 that the string-like body 21 straddles. In the case of a porous elastic body 23 having a width that straddles two paper-passing paths L1 of a continuous sheet S1 having a product width of 170 to 230 mm for sanitary thin paper, it is desirable that the curvature R1 is about 1 to 3 m and the curvature R2 is about 2 to 6 m.

[0041] On the other hand, the continuous sheet cutting device 20 of this embodiment preferably has a liquid supplying means 24 for supplying liquid to the porous elastic body 23. This liquid supplying means 24 can be composed of, for example, a nozzle or supply port for applying liquid to the porous elastic body 23 by dripping, spraying, jetting, etc., a supply path 24A such as a flexible material or metal tube capable of transporting liquid, and a pump 24B for transporting liquid. The liquid supplying means 24 may be any means capable of supplying liquid appropriately so that the porous elastic body 23 does not dry out excessively.

[0042] Cutting of a continuous sheet by the above-described continuous sheet cutting device 20 according to the present invention is performed as follows, as further shown in Figures 6 and 7. That is, first, from the position shown in Figures 4 and 5, as shown in Figures 6(A) and 7(A), the string-like body 21 is moved by a driving means 22 such as a cylinder mechanism to come into contact with the porous elastic body 23 in a liquid-impregnated state, thereby allowing a sufficient amount of liquid to be impregnated or adhered to the string-like body 21. The porous elastic body 23 is made of a material such as a sponge and is capable of retaining a large amount of liquid, and the string-like body 21 is made of a net cord or the like and is capable of impregnating and adhering to an appropriate amount of liquid.

[0043] Next, as shown in Fig. 6(B) and Fig. 7(B), the string-like body 21 to which the liquid has been applied is moved along a moving path 21R by a driving means 22 such as a cylinder mechanism, and pressed against the continuous sheet S1 present in the paper passage path L1. In this device 20, the moving path 21R of the string-like body 21 is arranged so as to intersect with the paper passage path L1 of the continuous sheet S1, so that the string-like body 21 to which the liquid has been applied is pressed against the continuous sheet S1 located in the paper passage path L1 by moving the string-like body 21 so as to cross the paper passage path L1. Since the continuous sheet S1 is sanitary thin paper, moisture is applied to the continuous sheet S1 by contact with the string-like body 21, and the paper strength is significantly reduced. In this state, the string-like body 21 is further pressed against the continuous sheet S1, so that the continuous sheet S1 is easily cut as shown in Fig. 6(C) and Fig. 7(C). After the continuous sheet S1 is cut, the string-like body 21 is returned to a position between the porous elastomer 23 and the paper path L1 shown in Figures 4 and 5 by the cylinder mechanism 22 in preparation for switching to the next original roll 5.

[0044] The liquid used in the device 20 to impregnate the porous elastic body 23 and the string-like body 21 in order to reduce the paper strength of the continuous sheet S1 is not limited. It may contain ordinary tap water, distilled water, or even appropriate auxiliary agents such as disinfectant alcohol and preservatives. However, it is naturally preferable that the liquid does not contaminate the folding mechanism 10A or the sanitary thin paper 2, and it is preferable to use distilled water mixed with an appropriate non-contaminating auxiliary agent.

[0045] Here, in the interfolder 10, the sheet path L1 from the original roll 5 to the folding mechanism 10A is provided with appropriate rolls 12 such as an expander roll for smoothing out wrinkles, a dancer roll for tension control, and a guide roll, so that the continuous sheet S1 can be changed to a vertical or horizontal direction, and there are various types depending on the installation position of the interfolder. In the continuous sheet cutting device 20 according to the present invention, the position of the sheet path L1 of the interfolder 10 is not necessarily limited. It can be provided at an appropriate position of the sheet path L1 of the continuous sheet S1 from the original roll 5 to the folding mechanism 10A. However, it is preferable that the moving path 21R of the string-like body 21 is configured to be horizontally ±20° at a position where the continuous sheet S1 is transported vertically ±20°. In the interfolder 10 shown in the figure, the continuous sheet S1 fed from the original roll support section 13 passes through the guide roll 12A and reaches the upper side, and then the continuous sheet S1 is moved horizontally and supplied from above the folding mechanism section 10A, and the continuous sheet cutting device 20 is provided at a position where the continuous sheet S1 is conveyed almost vertically upward through the guide roll 12A. At such a position, the risk of liquid that cannot be held by the porous elastic body 23 or the string-like body 21 contacting the continuous sheet S1 even if it is accidentally dripped is greatly reduced.

[0046] In addition, the present device 20 can be provided with a tray 25 for receiving liquid dripped onto the porous elastomer 23 or at a position below the moving path 21R, and further with a return means or return path for returning the liquid received in the tray to the porous elastomer or liquid supply means.

[0047] In addition, in the continuous sheet cutting device 20, as shown in the example, it is preferable to provide a receiving portion 26 for receiving the continuous sheet S1 at a position facing the porous elastic body 23 across the paper passage path L1. For example, this receiving portion 26 can be composed of a pair or one guide roll 26 provided immediately adjacent to the moving path 21R of the string-like body 21. The string-like body 21 is moved along the moving path 21R from the porous elastic body 23 side. After coming into contact with the continuous sheet S1, the string-like body 21 is further moved beyond the paper passage path L1, whereby the receiving portion 26 supports the continuous sheet S1, and the pressure applied to the continuous sheet S1 by the string-like body 21 is increased, assisting cutting by the string-like body 21.

[0048] In addition, an interfolder 10 having a plurality of the continuous sheet cutting devices 20 according to the present invention described above, preferably an interfolder in which a continuous sheet cutting device 20 is provided for each folding mechanism 10A and each of the continuous sheet S1 can be cut separately, is also a related invention. In this interfolder, it is preferable to configure the plurality of cutting devices so that they are operated simultaneously or by a single operation. [Explanation of symbols]

[0049] 1... stack of sanitary tissue paper, 1A... continuous stack, 2... sanitary tissue paper, 2A... inside of folded-over part, 2B... folded-over piece, 2C... folded edge, 2R... root part of sanitary tissue paper exposed from outlet, 3A... short side, 3B... long side, 3C... top and bottom surfaces of stack, 5... original roll, 5A... original roll unit, 6... shaft, 10... interfolder, 10A... folding mechanism, 11... folding plate, 1 2...roll, S1...continuous sheet, 13...raw roll support part, L1...paper path, 14...cutter, 20...continuous sheet cutting device, 21...string-like body, 21R...movement path, 22...driving means (cylinder mechanism), 23...porous elastic body, 23A...curved convex surface, 24...liquid supply means, 24A...supply path, 24B...pump, 25...receiving tray, 26...receiving part, R1, R2...bend of curved convex surface.

Claims

1. A device for cutting a continuous sheet leading to a folding mechanism of an interfolder, comprising: a liquid-impregnated or liquid-attachable string-shaped body that faces a paper-passing path of one or more continuous sheets and is arranged across the paper-passing path; a moving path of a string-like body that intersects a paper passing path of the continuous sheet; A driving means for reciprocatingly moving the string-like body within a moving path; a liquid-absorbent porous elastic body disposed in a path of movement of the string-like body; A continuous sheet cutting device characterized in that a liquid is impregnated into a string-like body by contact with a porous elastic body, and the liquid-impregnated string-like body is pressed against a continuous sheet located in a paper passageway by a driving means, thereby cutting the continuous sheet.

2. 2. The continuous sheet cutting device according to claim 1, further comprising a liquid supplying means for supplying liquid to the porous elastic body.

3. a receiving portion for receiving the continuous sheet at a position opposite to the porous elastic body across the sheet passage path; 3. The continuous sheet cutting device according to claim 1, wherein the string-like body is configured to contact the continuous sheet in a state where the continuous sheet is supported by the receiving portion.

4. 4. The continuous sheet cutting device according to claim 1, wherein the porous elastic body has a curved convex surface at a portion where the porous elastic body contacts the string-like body, the surface being directed toward the paper passage.

5. 5. An interfolder having a continuous sheet cutting device, comprising a plurality of the continuous sheet cutting devices according to claim 1.

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