JP2017193448A - Method and device for cutting skin of raw fabric roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for cutting a skin of a raw fabric roll wrapped with liquid absorbing paper, which contribute to automation.SOLUTION: A method of cutting at least an outermost peripheral raw fabric S of a raw fabric roll R, around which a raw fabric S made of liquid absorbing paper is wound from a base end Sb to a distal end Se thereof, over the entire width of the raw fabric S in a width direction W includes: a step of, in a state in which a skin Rs constituting the outermost peripheral raw fabric S is wound as a part of the raw fabric roll R, pasting an adhesive surface Tf of an adhesive tape TA extending in the width direction W to an outside surface of the skin Rs from a first edge part R1 to a second edge part R2 of the skin Rs in the width direction W; and a step of peeling off and breaking the skin Rs over the entire width in the width direction W by removing the adhesive tape TA pasted to the skin Rs from the raw fabric roll R.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a method and an apparatus for cutting a skin of an original roll in which an original made of absorbent paper is wound into a roll.

  For example, many materials of disposable wearing articles such as paper diapers and napkins are sheet-like materials cut out from a raw fabric roll. When producing such a sheet, the raw material is unwound from the raw material roll. The part of the outermost skin of the outer roll is easily soiled or damaged during transportation, and therefore needs to be removed.

JP08-40426A (Summary) JP08-113399A (Fig. 1) JP04-44940A (FIG. 14) JP06-81915U (summary)

  The processing of the article is almost fully automatic, improving productivity. However, the above-mentioned prior art does not disclose a method for cutting an original made of liquid absorbent paper.

Accordingly, an object of the present invention is to provide a method and an apparatus for cutting the surface of a raw roll wound with liquid absorbent paper, which contributes to automation.

The liquid absorbent paper is paper having water absorbency of disposable wearing articles such as paper diapers, and may be used, for example, for a so-called core wrap sheet that is wrapped to hold the absorbent body. Such liquid-absorbent paper has poor stretchability and is easily broken, but it is difficult to cut the liquid-absorbent paper with a blade on the raw roll.

For example, when cutting the easily tearable absorbent paper on the roll, if the gap is formed with a thin spacer between the skin of the roll and the inner layer of the roll, the absorbent paper breaks. It is easy to obtain the desired cutting state.

Even if the gap can be formed, the thin absorbent paper has low rigidity (is weak), so that the absorbent paper to be cut has wrinkles and is difficult to cut with a blade.

For this reason, it is extremely difficult to cut only the skin of the raw roll.

In this cutting method, at least the outermost raw fabric S of the original fabric roll R wound from the base end Sb to the leading end Se of the original fabric S made of liquid absorbent paper is cut over the entire width in the width direction W of the original fabric S. A way to
In a state where the outer skin Rs constituting the outermost raw fabric S is wound as a part of the original fabric roll R, the width R of the outer skin Rs extends from the first edge R1 to the second edge R2. A step of adhering the adhesive surface Tf of the adhesive tape TA extending in the width direction W to the outer surface of the skin Rs;
By removing the adhesive tape TA attached to the skin Rs from the raw roll R, the portion of the skin Rs attached with the adhesive tape TA is peeled across the entire width in the width direction W. And a step of breaking.

According to this cutting method, the adhesive tape affixed to the skin of the original fabric roll is peeled off from the original fabric roll together with the outer skin to break the outer skin. Therefore, it is possible to cut only the skin of the raw fabric roll formed of the absorbent paper that is easily broken. Therefore, it is possible to automate the cutting of the skin of the original fabric roll wound with liquid absorbent paper.

The cutting apparatus according to the present invention is configured so that at least the outermost raw material S of the raw material roll R wound from the base end Sb to the front end Se of the raw material S made of liquid absorbent paper is the full width in the width direction W of the original material S. A device for cutting over,
A feed roller 40 that supports the tape roll Tr so that the adhesive tape TA is unwound from a tape roll Tr wound with a continuous adhesive tape TA in the longitudinal direction;
The pressure-sensitive adhesive surface Tf of the pressure-sensitive adhesive tape TA fed from the feed roller 40 is the state of the outermost outer circumference of the raw roll R with the pressure-sensitive adhesive tape TA extending along the width direction W of the raw roll R. A contact roller 41 adhered to the skin Rs which is the raw fabric S, and
A drive roller 42 that peels off the adhesive tape TA attached to the skin Rs by the contact roller 41 together with a portion of the skin Rs to which the adhesive tape TA is attached;
The delivery roller 40, the contact roller 41, and the drive roller 42 are mounted so that the contact roller 41 moves between the first edge R1 and the second edge R2 in the width direction W of the raw roll R. And a configured slider 43.

According to this cutting apparatus, the slider 43 on which the feed roller 40, the contact roller 41, and the drive roller 42 are mounted moves over the entire width of the original roll R in the width direction W. Along with this movement, the adhesive tape TA is unwound from the feed roller 40, attached to the skin by the contact roller 41, and further peeled off together with the skin by the drive roller 42. Thereby, the skin is broken and cut in the width direction W of the raw roll R.

Therefore, it is possible to cut only the skin of the raw fabric roll formed of the absorbent paper that is easily broken. Therefore, it is possible to automate the cutting of the skin of the original fabric roll wound with liquid absorbent paper.

FIG. 1 is a process diagram showing Example 1 of a method for removing an epidermis according to the present invention. FIG. 2 is a process diagram showing a second cutting process. 3A and 3B are schematic side views showing the drawer device, respectively. FIG. 4 is a schematic front view showing the entire removal system. FIG. 5 is a schematic perspective view, partly in section, showing the moving device. FIG. 6 is a schematic side view, partly in section, showing an embodiment of the first (main) cutting device. FIGS. 7A and 7B are a schematic front view and a schematic side view, partly in section, showing the first (main) cutting device and the pressing tool at the origin position, respectively. 8A and 8B are schematic perspective views showing examples of this cutting method, respectively. FIG. 9A, FIG. 9B, and FIG. 9C are side views of the first cutting device showing the first cutting step, respectively. 10A is a schematic perspective view showing a second embodiment of the cutting method, FIG. 10B is a schematic perspective view for explaining the advantages of the cutting method, and FIG. 10C is a front view showing the second embodiment. FIG. 11 is a schematic side view, partly in section, showing another embodiment of the cutting apparatus. FIG. 12 is a schematic side view, partly in section, showing still another embodiment of the cutting apparatus.

Preferably, in the method of the present invention, while unwinding the adhesive tape TA from the tape roll Tr wound with the adhesive tape TA before pasting, and
The affixing step is performed while the tape roll Tr moves in the first width direction W1 in the width direction W from the first edge R1 toward the second edge R2.

  By moving not only the unwound adhesive tape TA but also the entire tape roll Tr in the first width direction W1 of the raw roll R, the adhesive tape TA will be easily attached.

More preferably, the contact roller 41 for bringing the adhesive surface Tf of the adhesive tape TA unwound from the tape roll Tr into contact with the skin Rs moves together with the tape roll Tr in the first width direction W1, A pasting step is executed.

When the contact roller 41 moves in the first width direction W1 together with the tape roll Tr, a stable application state over the entire width of the original roll R will be obtained.

More preferably, the adhesive tape TA of the skin Rs is peeled off from the first edge R1 to the second edge R2 by peeling the adhesive tape TA attached to the skin Rs by the contact roller 41. It is executed to peel off the portion where is adhered from the raw roll R.

In this case, it would be possible to break the skin Rs over the entire width of the raw roll R.

More preferably, the drive roller 42 for peeling off the adhesive tape TA is rotationally driven while moving in the first width direction W1 together with the tape roll Tr and the contact roller 41, and the adhesive tape TA is peeled off. .

Since the driving roller 42 is rotationally driven while moving in the first width direction W1 and the adhesive tape TA is peeled off, the adhesive tape TA can be surely peeled off.

Absorbent paper is also called tissue in Japan, and is generally a thin laminate of natural wood fibers. Many of such liquid-absorbent papers have continuous fibers along the flow direction during production. Therefore, the liquid absorbent paper has anisotropy such that it is easy to tear along the continuous direction, but is difficult to tear in the width direction orthogonal to the continuous direction. For example, toilet paper rolls are generally easy to tear in the continuous unwinding direction and difficult to tear in the width direction.

For this reason, when the absorbent paper is broken in the width direction, the absorbent paper may be torn long along the continuous direction (circumferential direction). In this case, for example, a trouble may occur when the broken absorbent paper is thinned with a slitter, or a defective product may be inadvertently generated when a cut end is handled and processed in a subsequent process. Absent.

From this point of view, preferably, a pair of leaf spring portions 45a that are spaced apart from each other in the circumferential direction of the original fabric roll R and that are in contact with the skin Rs on both sides of the contact roller 41 together with the contact roller 41 By moving in the width direction W1, the both sides of the portion of the skin Rs where the adhesive tape TA is adhered are pressed toward the center of the raw roll R in the radial direction Z while the stripping is performed. Done.

In this case, on both sides of the contact roller 41, a pair of leaf springs 45a separated in the circumferential direction of the fabric roll R presses the skin of the fabric roll R, and adheres while the pair of leaf springs 45a are pressing. Tape TA is peeled off with the epidermis. Therefore, the skin can be broken while preventing the absorbent paper that is easily torn in the circumferential direction from being torn over a long range in the circumferential direction.

From the same viewpoint, preferably, in the breaking step, a pair of parallel presses the skin Rs from the first edge R1 to the second edge R2 toward the center in the radial direction Z of the raw roll R. The sticking tape TA is applied and peeled off between the presser bars 44.

In this case, a pair of parallel pressing bars 44 spaced apart from each other in the circumferential direction press the skin of the raw roll R, and the adhesive tape TA is peeled off together with the skin while the pair of pressing bars 44 are pressing. Therefore, it is possible to prevent the absorbent paper that is easily torn in the circumferential direction from being torn over a long range in the circumferential direction.

From the same point of view as described above, in the present device, the slider 43 on which the contact roller 41 is mounted preferably has a first head from the first edge R1 toward the second edge R2 when the adhesive tape TA is applied. Configured to move in the width direction W1,
A pair of leaf springs 45 a mounted on the slider 43, spaced apart from each other in the circumferential direction of the original fabric roll R, and in contact with the skin Rs on both sides of the contact roller 41 are further provided.

In this case, as described above, the skin can be broken while preventing the absorbent paper from tearing over a long circumferential range.
The leaf spring portion 45a moves in the first width direction W1 together with the contact roller 41, so that the breakage can be realized with a small part. Therefore, the apparatus can be miniaturized.

From the same viewpoint, preferably, the raw roll R is disposed on both sides of the contact roller 41, and the skin Rs extends from the first edge R1 to the second edge R2 with the diameter of the raw roll R. A pair of parallel pressing rods 44 that are pressed toward the center in the direction Z are further provided.

Features described and / or illustrated in connection with one such embodiment or each of the following examples may be in the same or similar form in one or more other embodiments or other examples, and / or It can be utilized in combination with or instead of the features of other embodiments or examples.

The invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings, in which: However, the examples and drawings are for illustration and description only and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.

Embodiment 1 of the present invention will be described below with reference to the drawings.
Prior to the description of the system according to the first embodiment, an outline of a method for removing the skin of the raw roll R will be described.

As shown in FIGS. 1A and 6, the raw roll R to which the skin removal method is applied is such that the tip Se of the raw fabric S is temporarily fixed to the outer peripheral surface Rf of the raw roll R with, for example, tape T or the like. Has been. That is, the original fabric roll R of FIG. 1A is wound from the base end Sb to the distal end Se of the original fabric S, and the distal end Se is temporarily fixed to the outer peripheral surface Rf. When removing the skin Rs, the original fabric S is cut at the two cut portions C1 and C2, but portions of the original fabric S that are not covered with the tape T may be cut.

The skin removal method includes the first cutting step of FIG. 1 (b), the drawing step of FIGS. 1 (c) to (f), the second cutting step of FIG. 1 (h), and the disposal step of FIG. 1 (i). Prepare.

In the first cutting step of FIG. 1B, in the first cut part C1 on the outermost periphery of the original fabric roll R, the original fabric S on the outermost periphery of the original fabric roll R extends over the entire width in the width direction W of FIG. Disconnect.

1 (c) and 1 (d), in the first cutting step, the first end of the pair of ends S11 and S12 in FIG. The one end S11 is pulled out from the original roll R in FIG. During the pulling-out process, the original roll R is rotated in the first circumferential direction D1.

In the second cutting step of FIG. 1 (h), the raw fabric S is cut across the entire width in the width direction W (FIG. 6) at the second cut portion C2 closer to the base end Sb than the first cut portion C1. To do. The length of the original fabric S from the first cut portion C1 to the second cut portion C2 is longer than one round of the outermost circumference of the original fabric roll R. In the second cutting step shown in FIGS. 1 (g) to (i), the portion of the original fabric S connected to the drawn out first end S11 (FIG. 1 (b)) is formed in the second cut portion C2. Disconnected.
Since the first cut portion C1 to the second cut portion C2 are longer than one round of the outermost circumference, naturally, the tip Se to the second cut portion C2 is longer than one round of the outermost circumference. long.

1 (c) to (g) and (i), the unwinding roller 9 (FIG. 4) on which the hollow portion Rc of the original roll R is mounted is rotated while driving the FIG. 1 (b). ) From the first cut portion C1 to the tip Se, and from the first cut portion C1 to the second cut portion C2 of FIG. 1 (h). The second cut edge S2 of the original fabric S is pulled out by the pulling device 3.

After the second cutting step, the raw roll R in FIG. 1 (j) is rotated in a second circumferential direction D2 opposite to the first circumferential direction D1. By this rotation, in order to obtain a processed product from the original fabric S, the initial phase of the new tip of the original fabric roll R is set.

Next, an outline of the removal system will be described.
In FIG. 4, the removal system includes a first cutting device 1, a second cutting device 2, a drawing device 3, an unwinding roller 9, a sensor 91, and a control device 100. The control device 100 controls the operation of the entire system according to the input from the sensor 91 and the like.

The control device 100 includes first, second, and third control units 101, 102, and 103. As will be described later, the first, second, and third control units 101, 102, and 103 control the rotation of the unwind roller 9, the operation of the second cutting device 2, the operation of the first cutting device 1, and the like, respectively. To do.

One or a plurality of sensors 91 may be provided, and information such as light from the raw roll R and ultrasonic waves may be output to the control device 100. The control device 100 may detect the detailed outer diameter of the original roll R, the winding direction, the position of the leading end Se of the original fabric S, and / or the position of the tape T in FIG.

The second cutting device 2 in FIG. 3A includes a cutter 21. The drawer device 3 includes a suction device 31.

In FIG. 4, the unwinding roller 9 is fitted with a hollow portion Rc of the raw roll R and is driven to rotate in first and second circumferential directions D1 and D2 by a motor (not shown).

The first cutting device 1 shown in FIG. 6 has an outermost periphery of the original fabric roll R in a first cut portion C1 (FIG. 1B) on the outermost periphery of the original fabric roll R mounted on the unwinding roller 9. Is cut across the entire width in the width direction W of FIG.

As shown in FIGS. 2A to 2E, the suction device 31 sucks the cut end of the original fabric S with a negative pressure and pulls it out from the original fabric roll R. The suction device 31 has a suction port 30. The suction port 30 is located farther from the unwinding roller 9 (FIG. 4) than the cutter 21 in the distal position Pf in FIGS. 2D to 2G, and closer to the unwinding roller 9 than the cutter 21. The suction device 31 shown in FIG. 4 is configured and controlled by the second control unit 102 so as to reciprocate between the proximal positions Pn shown in FIGS. 2 (a) to 2 (c).

The cutter 21 in FIG. 2 (f) cuts the original fabric S drawn by the suction device 31 over the entire width in the width direction W in FIG. 6 at the second cut portion C2.

The removal system of FIG. 2A includes an air blower 32. The air blower 32 is disposed between the cutter 21 and the unwinding roller 9 (FIG. 4), and the cut end S11 of the original fabric S is separated from the original fabric roll R by blowing out air A1.

Next, an outline of an example of the first cutting device will be described.
A first cutting device 1 shown in FIG. 6 is a device that cuts the skin Rs of the raw fabric roll R of the raw fabric S made of liquid-absorbing paper over the entire width in the width direction W of the original fabric S. The liquid absorbent paper may constitute a core wrap sheet of an absorbent main body of a paper diaper.

The first cutting device 1 includes a feed roller 40, a contact roller 41, a driving roller 42, a nip roller 42n, a leaf spring 45, and a moving device 4. The moving device 4 moves the rollers 40, 41, 42, 42n, the leaf springs 45 and the like in the width direction W so that the first cutting device 1 can cut the skin Rs over the entire width in the width direction W. Move.

As shown in FIGS. 8A and 8B, the feed roller 40 supports the tape roll Tr so that the adhesive tape TA is unwound from the tape roll Tr wound with the adhesive tape TA continuous in the longitudinal direction.
The contact roller 41 is configured so that the adhesive surface Tf of the adhesive tape TA fed from the feed roller 40 is in a state where the adhesive tape TA extends along the width direction W of the original fabric roll R. Adhering to the outer skin Rs which is the outermost raw material S is adhered.
The drive roller 42 in FIG. 9C peels off the adhesive tape TA attached to the skin Rs by the contact roller 41 together with the skin Rs of the part to which the adhesive tape TA is attached.

As shown in FIGS. 5 and 7A, the slider 43 on which the contact roller 41 (FIG. 7B) and the like are mounted is attached to the first edge R1 of FIG. 5 when the adhesive tape TA (FIG. 7B) is applied. It is comprised so that it may move to the 1st width direction W1 which goes to the said 2nd edge R2.

A leaf spring 45 is mounted on the slider 43. The leaf spring 45 in FIG. 8A includes a pair of leaf spring portions 45a. As shown in FIG. 8B, the pair of leaf spring portions 45 a are separated from each other in the circumferential direction of the original fabric roll R and are in contact with the skin Rs on both sides of the contact roller 41.

The first cutting device 1 includes a pair of parallel pressing bars 44. A pair of pressing bars 44 are disposed on both sides of the contact roll 41 in the circumferential direction of the original roll R, and the skin Rs extends from the first edge R1 to the second edge R2 of the original roll R. Press toward the center in the radial direction Z.

Next, the structure of the first and second cutting devices 1 and 2 in FIG. 4 will be described.
The first cutting device 1 and the second cutting device have first and second outer diameter setting devices 61 and 62, respectively. The first outer diameter setting device 61 is equipped with the moving device 4 of the first cutting device. A second cutting device 2 and a drawing device 3 are mounted on the second outer diameter setting device 62.

The first and second outer diameter setting devices 61 and 62 are arranged such that the positions of the first and second cutting devices 1 and 2 in the radial direction Z correspond to the actual outer diameter of the raw roll R, respectively. It is configured. An example of the structure of these setting devices 61 and 62 will be described on behalf of the first outer diameter setting device 61.

The first outer diameter setting device 61 has a screw shaft 63 of FIG. A movable frame 65 is attached to a female screw body 64 that is screwed onto the screw shaft 63. It may be set manually without providing the motor M.
Further, when the position of the unwinding roller 9 that supports the original roll R can be controlled, such as when the unwinding roller 9 of FIG. 4 is provided on the robot arm, the outer diameter setting devices 61 and 62 are omitted. The first and second cutting devices 1 and 2 may be arranged so as not to move in the radial direction Z.

Next, the moving device 4 will be described with reference to FIGS.
The moving device 4 moves the main elements of the first cutting device 1 from the origin position indicated by the two-dot chain line in FIG. 6 to the moving end position indicated by the solid line.

As shown in FIG. 5, the moving device 4 includes a pair of end plates 46 fixed to a movable frame 65, three mutually parallel rods 47 laid between the pair of end plates 46, 46, And a slider 43. The slider 43 may be structured to reciprocate along the rod 47 by a known linear motor.

A moving part 48 is fixed to the slider 43. 6 is mounted with the contact roller 41 and the leaf spring 45 via a pressing mechanism 8A (FIG. 7A). A touch sensor 15 is attached to the moving part 48 via an air cylinder 16.

The touch sensor 15 in FIG. 7B moves in the radial direction Z by the ascending operation of the air cylinder 16, contacts the original fabric roll R, and outputs a signal contacting the original fabric roll R to the control device 100. Thereby, the control apparatus 100 confirms that the positional relationship of the radial direction Z of the contact roller 41 and skin Rs is a predetermined relationship.

Next, details of the first cutting device 1 will be described.
As shown in FIG. 7B, the contact roller 41 and the leaf spring part 45a of the first cutting device 1 are previously pressed against the outer surface Rs of the raw roll R with a predetermined pressing force 8s (FIG. 7A). ) In a state of projecting in the radial direction Z by the air pressure. From this state, as shown in FIGS. 9A and 9B, the moving portion 48 moves in the first width direction W1, so that the contact roller 41 and the leaf spring 45 come into contact with the original roll R and resist the air pressure. Retract slightly in the radial direction Z. As a result, the adhesive tape TA comes into contact with the skin Rs with the desired contact pressure.

The pressing mechanism 8A shown in FIG. 7A includes a pressing cylinder 8s and a bracket 8b, and the contact roller 41 and the leaf spring 45 are moved to the original roll R as shown in FIGS. 9A and 9B by the air pressure of the pressing cylinder 8s. Against the skin Rs. By this pressing, a force for sticking the adhesive tape TA to the skin Rs is applied.

As shown in FIG. 7B, on the moving part 48, the feed roller 40, the drive roller 42, the nip roller 42n, and the guide roller 4p are rotatably attached. A storage box 49 (FIG. 6) is fixed to the moving unit 48.
The drive roller 42 is rotationally driven by a drive motor (not shown). The drive roller 42 sandwiches the tape-like material TD to be discarded with the nip roller 42n, peels off the adhesive tape TA attached to the skin Rs, and prevents the adhesive tape TA from being loosened during conveyance.
Note that the tape-like material TD in FIG. 8B is a laminate in which the fracture piece S3 of the skin Rs is laminated on the adhesive tape TA.

As shown in FIG. 7B, the tape TA wound around the tape roll Tr loaded on the feed roller 40 has the guide roller 4p and the contact roller driven by the driving force of the contact roller 41 rotating in the first width direction W1. 41 and the guide roller 4p are unwound while being guided.
The feed roller 40 may be provided with a slip clutch (brake). In this case, it is possible to prevent the unwinding of the adhesive tape TA from the tape roll Tr.

As shown in FIG. 9C, while the contact roller 41 moves in the first width direction W1 along the surface of the original roll R, the adhesive tape TA is conveyed while being peeled behind the contact roller 41. Thereby, the skin Rs of the raw roll R is broken while the broken pieces S3 are adhered and laminated on the adhesive tape TA of FIG. 8B.

As shown in FIG. 8A, the pair of leaf springs 45a may be formed by a single U-shaped leaf spring 45. The proximal end of the leaf spring 45 in FIG. 7A is fixed to the bracket 8b with screws or the like. The leaf spring portion 45a of FIG. 7B may be attached obliquely such that the distal end opposite to the first width direction W1 is directed toward the center in the radial direction Z rather than the contact roller 41.

Next, the pressing tool 12 of the first cutting device 1 in FIGS. 5 to 7B will be described.
6 is configured such that the plate 12p is driven in the radial direction Z via the air cylinder 12a with respect to the bracket 12b of FIG. In the case of this example, a pair of pressing rods 44 are installed between the pair of plates 12p. Note that the pair of pressing bars 44 may be composed of a pair of free rollers or the like.

As shown in FIG. 7A, the pressing bars 44 are disposed on both sides in the circumferential direction with respect to the contact roller 41 and the leaf spring portion 45a, and the skin Rs of the raw roll R is being cut (broken) by the first cutting device 1. Is pressed toward the raw roll R. That is, the pressing bar 44 in FIG. 7B moves toward the center in the radial direction Z of the raw roll R just before the cutting (breaking) by the first cutting device 1 is started, and presses the skin Rs.

Next, the second cutting device 2 and the drawing device 3 shown in FIGS. 2 to 4 will be described.
The second cutting device 2 and the drawing device 3 in FIG. 4 are disposed below the unwinding roller 9 and at a lower position away from the first cutting device 1 by about 90 ° in the circumferential direction.

In FIG. 3A, the drawer device 3 has a storage chamber 33 connected to a negative pressure source. A flat cylindrical suction pipe 34 is provided in the storage chamber 33 so as to reciprocate between a proximal position Pn in FIG. 3A and a distal position Pf in FIG. 3B.

The 2nd cutting device 2 is arrange | positioned at the suction opening 30 side of the said storage chamber 33 of FIG. 3B. The second cutting device 2 includes an anvil 22, two movable rollers 23 and 24, and two fixed rollers 25 and 26.

The first control unit 101 in FIG. 4 performs the unwinding roller 9 (until the cutting by the second cutter 21 in FIGS. 1C to 1F after the cutting in FIG. 1B by the first cutting device 1. 4) is rotated in the first circumferential direction D1 together with the original roll R, and the unwinding roller 9 (FIG. 4) is moved to the original roll after being cut by the second cutter 21 in FIGS. 1 (g) and (h). Together with the anti-roll R, it is rotated in the second circumferential direction D2 opposite to the first circumferential direction D1.

Before the cutting by the second cutter 21, the second control unit 102 of FIG. 4 is configured so that the suction port 30 is at the proximal position Pn as shown in FIGS. The suction device 31 is controlled so that the suction port 30 is at the distal position Pf when the second cutter 21 in FIGS. 2D to 2G is cut.

Hereinafter, the details of the method of discarding the skin Rs after the first cutting step will be described.

After the first cutting step of FIG. 1B, the raw roll R is rotated in the first circumferential direction D1 during the pulling step of FIGS. 1C to 1F. The first circumferential direction D1 is set as an unwinding direction for generating a workpiece from the raw fabric S.
The raw roll R in FIG. 6 is supported by the unwinding roller 9 so as to be rotatable around a horizontal axis H. In the step of rotating in the first circumferential direction D1 of FIGS. 1C to 1F, the raw roll R so that the cut first end S11 of the raw fabric S is directed downward from above. Is rotated in the first circumferential direction D1.

As shown in FIG. 2A, before the first end S11 approaches the suction port 30, air is blown from the air blower 32 in a direction in which the first end S11 rises. At the same time, the inside of the narrow passage in the storage chamber 33 and the suction pipe 34 in FIG. 3A is set to a negative pressure, and the first end S11 is sucked into the suction pipe 34 along the roller 23 as shown in FIG.

As shown in FIG. 2 (c), when a part of the original fabric S is sucked into the suction pipe 34, the suction pipe 34 at the proximal position Pn moves to the distal position Pf in FIG. 2 (d). . After this movement, as shown in FIG. 2E, the roller 23 approaches the roller 25, and the nip roller 24 sandwiches the original fabric S with the roller 26.

Thereafter, as shown in FIGS. 2 (f) and 1 (h), the second cutter 21 cuts the raw fabric S connected from the skin Rs to the base end Sb in the second cut portion C2. After the cutting, the nip by the nip rollers 24 and 26 is released, and the cut ends S1 and S2 of FIGS. 1D and 1H are sucked and stored in the storage chamber 33 of FIG. 3B.
The length of the original fabric S from the tip Se of the original fabric S in FIG. 1A to the second cut portion C2 in FIG. 1I is the outermost circumference of the original fabric roll R. It is larger than the length of one lap.

2 (g) and FIG. 1 (i) to FIG. 1 (j), after the second cutting step, the raw roll R is moved to a second circumference opposite to the first circumferential direction D1. Rotate in direction D2. The leading end of the raw roll R from which the skin Rs has been cut and removed is set at a predetermined position required in the subsequent processing steps.

Next, details of an example of a cutting method by the first cutting device 1 of FIG. 6 will be described.
In this example, the cutting method of this example is a method of cutting only the outermost raw fabric S of the original fabric roll R over the entire width in the width direction W of the original fabric S, and the pressing step and sticking described below Includes a process and a breaking process.

In the pressing step, the pair of pressing bars 44 of the pressing tool 12 shown in FIGS. 8A and 8B are pressed against the original roll R over the entire width. Thereby, the skin Rs of the raw fabric roll R is maintained in a stable state in which it is difficult to be displaced in the radial direction Z and the first width direction W1.

That is, before the pasting step, the skin Rs is held on the both sides in the circumferential direction of the feeding roller 40 and the leaf spring 45 at the first edge R1 by a pair of pressing bars 44 of the pressing tool 12. Press toward the center in the radial direction Z. The sticking step and the breaking step are executed in this pressed state.

As shown by a two-dot chain line in FIG. 6, the first cutting device 1 stands by at the origin position on the first edge R1 side of the raw roll R. 7B, the contact roller 41 and the leaf spring 45 are maintained in the radial direction Z so as to protrude from the skin Rs of the raw roll R through the bracket 8b.

Further, at this origin position, the adhesive tape TA along the guide roller 4p and the contact roller 41 maintains a convex shape toward the skin Rs of the raw roll R.

In this state, the touch sensor 15 moves in the radial direction Z until the touch sensor 15 comes into contact with the skin Rs of the raw fabric roll R in FIG. After the control device 100 (FIG. 4) confirms the positional relationship between the first cutting device 1 and the original fabric roll R by the touch sensor 15, the touch sensor 15 returns to the original position.

After the confirmation, the driving force of the driving roller 42 is applied. Thereby, tension | tensile_strength is provided to adhesive tape TA unwound immediately from the tape roll Tr. In this embodiment, the driving force of the driving roller 42 is set to be smaller than the braking force of the feeding roller 40, and therefore the adhesive tape TA is not unwound from the tape roll Tr at the origin position.

Then, the 1st cutting device 1 is moved by the said moving apparatus 4 from the said origin position shown by the dashed-two dotted line of FIG. 6 to the movement end position shown as a continuous line. That is, the rollers 40, 4p, 41, 42, 42n and the storage box 49 mounted on the moving unit 48 are moved from the start end to the end in the first width direction W1 by driving the slider 43 in FIG. 7A. During this movement, and in a state where tension is applied to the adhesive tape TA, the pasting step and the breaking step are executed.

Now, the first cutting device 1 starts to move in the first width direction W1 from the origin position in FIG. 9A, and immediately after that, as shown in FIG. 9B, the contact roller 41 comes into contact with the original roll R via the adhesive tape TA. . At the time of this contact, the contact roller 41 is pushed by the original roll R, whereby the pressing cylinder 8s is slightly contracted, the bracket 8b is slightly retracted, and the contact roller 41 is moved back as shown in FIG. 9B. The skin Rs of the anti-roll R is in contact with the adhesive tape TA.

On the other hand, the leaf spring portion 45a of the leaf spring 45 protruding toward the center in the radial direction Z of the raw roll R from the contact roller 41 is directed outward in the radial direction Z by the retraction of the bracket 8b. Move a little. At the same time, the plate spring portion 45a is also pushed by the original fabric roll R, and the inclination of the plate spring portion 45a inclined with respect to the outer surface of the original fabric roll R becomes smaller, and eventually the plate spring portion 45a as shown in FIG. 9C. Moves in the first width direction W1 along the skin Rs of the raw roll R.
During this movement, each leaf spring portion 45 a in FIG. 8B presses the skin Rs against the original roll R on both sides of the contact roller 41.

On the other hand, the first cutting device 1 including the contact roller 41 moves in the first width direction W1 while the adhesive tape TA in FIG. 9B is in contact with the skin Rs of the raw roll R, so that the adhesive tape TA is moved in the width direction W. Along the skin Rs. The adhesive tape TA is continuously unwound from the tape roll Tr by moving the contact roller 41 in the first width direction W1 while rotating with the adhesive tape TA applied.
Thus, the adhesive tape that extends in the width direction W from the first edge R1 in the width direction W of the skin Rs to the second edge R2 in a state where the skin Rs is still wound as a part of the raw roll R. An affixing step of affixing the TA adhesive surface Tf to the outer surface of the skin Rs is performed.

That is, the tape roll Tr is unwound from the first edge R1 to the second edge R2 (FIG. 6) while the adhesive tape TA is unwound from the tape roll Tr around which the adhesive tape TA has been wound. The affixing step is executed by moving in the first width direction W1 over the entire width. Further, the contact roller 41 for bringing the adhesive surface Tf of the adhesive tape TA unwound from the tape roll Tr into contact with the skin Rs moves together with the tape roll Tr in the first width direction W1 so as to be attached. The process is executed.

The adhesive tape TA affixed to the skin Rs is peeled off and collected by the driving force of the driving roller 42 while being guided by the rollers 4p and 42n and sandwiched between the driving roller 42 and the nip roller 42n. Is done. At this time, a broken piece S3 of the skin Rs is attached to the adhesive surface Tf of the adhesive tape TA in a strip shape, and the adhesive tape TA in a state of being attached to the skin Rs is attached to the raw roll as shown in FIG. 8B. By being removed from R, a breaking process is performed in which the skin Rs of the portion to which the adhesive tape TA is attached is peeled off and broken across the entire width in the width direction W.

That is, a part of the skin Rs is removed from the raw roll R by peeling off the adhesive tape TA attached to the skin Rs by the contact roller 41 from the first edge R1 to the second edge R2. The breaking process which peels off from is performed. 9C is driven to rotate while moving in the first width direction W1 together with the tape roll Tr and the contact roller 41, and the adhesive tape TA is peeled off together with a part of the skin Rs. The breaking process is performed.

8B moves together with the contact roller 41 in the first width direction W1, so that the skin Rs on both sides of the contact roller 41 is the center in the radial direction Z of the original roll R. The stripping is performed while being pressed toward. Moreover, in the said fracture | rupture process, between said 1st edge part R1 and said 2nd edge part R2, between the pair of parallel press bars 44 which press the said skin Rs toward the center of the radial direction Z of the said fabric roll R The adhesive tape TA is applied and peeled off.

As shown in FIG. 9C, the peeled adhesive tape TA is fed into the storage box 49 in the state of a laminate in which the broken pieces S3 are adhered. The laminate may be compressed in the storage box 49. Further, the laminate may be taken up by a take-up roller without being fed into the storage box 49.

After the breakage, the first cutting device 1 moves to the moving end position indicated by the solid line in FIG. After the rupture, the contact roller 41 is not in contact with the original roll R. Thereby, the contact roller 41 and the leaf | plate spring 45 are in the state protruded toward the original fabric roll R similarly to the said origin position.
When the first cutting device 1 returns from the moving end position to the origin position, the control device 100 controls so that the pressing cylinder 8s of FIG. 7A contracts, and the contact roller 41 and the leaf spring 45 are moved to the original roll. Retreat in the radial direction Z to a position not in contact with R. Thereafter, the slider 43 moves in the direction opposite to the first width direction W1 in FIG. 6 and returns to the original position, and then the cylinder 8s expands to bring the contact roller 41 and the leaf spring 45 into a protruding state.

10A and 10C show Example 2. FIG.
In the second embodiment, the first cutting device 1 further includes a breaking blower 79.
In the case of the first embodiment, as shown in FIG. 10B, a part of the skin Rs1 may remain without being broken. The reason will be briefly described.

The liquid absorbent paper has a small rigidity (good waist), and therefore, it tends to cause twists and wrinkles. Now, when the tape roll Tr rotates and moves in the first width direction W1 together with the contact roller 41, a compressive force in the radial direction Z is generated in the skin Rs, and friction is generated between the adhesive tape TA and the skin Rs. Power is generated. For this reason, a ridge Rs0 may occur in front of the contact roller 41. When such wrinkles Rs0 occur, the adhesive tape TA may not be adhered to the skin Rs, and a part of the skin Rs1 may remain unbroken.

The breaker blower 79 in FIG. 10A blows break air A3 from the tip 79e just behind the contact roller 41. This air A3 will collide with the broken part of the raw roll R as shown in FIG. 10C, and will break a part Rs1 of the skin remaining without breaking as shown in FIG. 10A. Therefore, the certainty of cutting improves.

FIG. 11 shows another example of the first cutting device 1.
In FIG. 11, the first cutting device 1 is drawn with a solid line at the origin position. The first cutting device 1 may stand by at the origin position where the center of the contact roller 41 is directly below the end surface of the original roll R, and may move along a movement path indicated by a two-dot chain line.
In this case, the control may be complicated, for example, it is necessary to match the center of the contact roller 41 with the position of the end face of the raw roll R.
However, in the case of this example, the contact roller 41 does not crush the end surface of the raw roll R, and the quality can be improved.

FIG. 12 shows still another example of the first cutting device 1.
In FIG. 12, the first cutting device 1 is drawn with a solid line at the origin position. About this example, the part which is different from the Example of FIG. 7B is demonstrated.

In this example, the adhesive tape TA that has passed between the driving roller 42 and the nip roller 42n is wound around the winding roller 400. As a result, the “peeled tape TD that has been peeled off” downstream of the nip roller 42n can be reliably wound, and the tape TD to be discarded can be compactly collected.

The winding roller 400 may be interlocked with the driving roller 42 of the nip roller via the belt 401. In this case, a separate drive source for disposal is not required.

The winding roller 400 may be provided with a slip clutch 402. While the winding diameter of the tape-like object TD on the winding roller 400 gradually increases, it is possible to prevent the winding force of the winding roller 400 from becoming excessive.
In this example, the arrangement of the guide rollers 4p is different from the example of FIG. 7B. The angle at which the adhesive tape TA is pulled away from the original fabric R starting from the contact roller 41 in FIG.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, the skin of the original fabric roll may be attached to the original fabric roll with an adhesive or an adhesive instead of a tape or the like.
The moving device may reciprocate not with a linear motor but with a belt or the like.
A presser is not necessarily required. The presser bar of the presser may be a bar instead of a roller.
Moreover, each leaf | plate spring part may be formed with a respectively separate leaf | plate spring. Further, the leaf spring portion is not necessarily required.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

The method and apparatus of the present invention can be used for various raw rolls as well as producing disposable wearing articles such as disposable pants, diapers and sanitary products.

1: First cutting device 12: Presser 15: Touch sensor 16: Air cylinder 2: Second cutting device 21: Cutter 22: Anvil 23-26: Roller 3: Pull-out device 30: Suction port 31: Suction device 32: Air blower
4: Moving device 40: Feeding roller 41: Contact roller 42: Driving roller
42n: Nip roller 43: Slider 44: Presser bar 45: Leaf spring 45a: Leaf spring portion 4p: Guide roller 49: Storage box 61, 62: Outer diameter setting device 79: Breaker 8A: Pushing mechanism 8b: Bracket 8s: Push Contact cylinder 9: Unwinding roller 91: Sensor 100: Control device 101: First control unit 102: Second control unit 103: Third control unit C1: First cut portion C2: Second cut portion D1: First D2: Second circumferential direction H: Horizontal axis Pf: Distal position Pn: Proximal position R: Original fabric roll R1: First edge R2: Second edge Rc: Hollow part Rf: Outer circumference surface
Rs: epidermis Rs0: ridge Rs1: part of epidermis S1: first cut edge S2: second cut edge S3: broken piece S: raw fabric Sb: base Se: tip
T: Tape TA: Adhesive tape Tf: Adhesive surface Tr: Tape roll
TD: Tape-like object W: Width direction W1: First width direction Z: Radial direction

Claims (10)

A method of cutting at least the outermost raw material S of the raw material roll R wound from the base end Sb to the front end Se of the raw material S made of liquid absorbent paper over the entire width in the width direction W of the original material S. ,
In a state where the outer skin Rs constituting the outermost raw fabric S is wound as a part of the original fabric roll R, the width R of the outer skin Rs extends from the first edge R1 to the second edge R2. A step of adhering the adhesive surface Tf of the adhesive tape TA extending in the width direction W to the outer surface of the skin Rs;
By removing the adhesive tape TA attached to the skin Rs from the raw roll R, the portion of the skin Rs attached with the adhesive tape TA is peeled across the entire width in the width direction W. A method for cutting the skin of a raw roll, comprising the step of breaking. In the method of claim 1, while unwinding the adhesive tape TA from the tape roll Tr wound with the adhesive tape TA before being applied, and
Cutting the skin of the raw roll, wherein the tape roll Tr is attached while moving in the first width direction W1 of the width direction W from the first edge R1 toward the second edge R2. Method.   3. The method according to claim 2, wherein the contact roller 41 for bringing the adhesive surface Tf of the adhesive tape TA unwound from the tape roll Tr into contact with the skin Rs moves in the first width direction W <b> 1 together with the tape roll Tr. The method for cutting the skin of the raw roll, wherein the step of pasting is performed.   4. The method according to claim 3, wherein the adhesive tape TA attached to the skin Rs by the contact roller 41 is peeled from the first edge R1 to the second edge R2, and the surface of the skin Rs. A method for cutting the skin of a raw roll, wherein the part to which the adhesive tape TA is attached is peeled off from the raw roll R.   5. The method of claim 4, wherein the driving roller 42 for peeling off the adhesive tape TA is rotationally driven while moving in the first width direction W <b> 1 together with the tape roll Tr and the contact roller 41, so that the adhesive tape TA is A method of cutting the surface of a raw roll that is peeled off. 6. The method according to claim 3, wherein a pair of leaf spring portions 45 a that are separated from each other in the circumferential direction of the raw roll R and that are in contact with the skin Rs on both sides of the contact roller 41 are By moving in the first width direction W <b> 1 together with the contact roller 41, both side portions of the portion of the skin Rs where the adhesive tape TA is attached are directed toward the center in the radial direction Z of the raw fabric roll R. A method for cutting the skin of a raw roll, wherein the stripping is performed while being pressed.   In the method of any one of Claims 1-6, in the said fracture | rupture process, the said skin Rs is made into the center of the radial direction Z of the said fabric roll R from said 1st edge part R1 to said 2nd edge part R2. The method of cutting the surface of the raw roll, wherein the adhesive tape TA is attached and peeled off between a pair of parallel pressing bars 44 that are pressed toward each other. An apparatus that cuts at least the outermost raw material S of the raw material roll R wound from the base end Sb to the front end Se of the raw material S made of liquid absorbent paper over the entire width in the width direction W of the original material S. ,
A feed roller 40 that supports the tape roll Tr so that the adhesive tape TA is unwound from a tape roll Tr wound with a continuous adhesive tape TA in the longitudinal direction;
The pressure-sensitive adhesive surface Tf of the pressure-sensitive adhesive tape TA fed from the feed roller 40 is the state of the outermost outer circumference of the raw roll R with the pressure-sensitive adhesive tape TA extending along the width direction W of the raw roll R. A contact roller 41 adhered to the skin Rs which is the raw fabric S, and
A drive roller 42 that peels off the adhesive tape TA attached to the skin Rs by the contact roller 41 together with a portion of the skin Rs to which the adhesive tape TA is attached;
The delivery roller 40, the contact roller 41, and the drive roller 42 are mounted so that the contact roller 41 moves between the first edge R1 and the second edge R2 in the width direction W of the raw roll R. An apparatus for cutting the surface of an original fabric roll, comprising a configured slider 43. 9. The cutting apparatus according to claim 8, wherein the slider 43 on which the contact roller 41 is mounted moves in the first width direction W1 from the first edge R1 toward the second edge R2 when the adhesive tape TA is applied. Configured as
An outer skin of the original fabric roll, further comprising a pair of leaf spring portions 45a mounted on the slider 43 and spaced apart from each other in the circumferential direction of the original fabric roll R and in contact with the outer skin Rs on both sides of the contact roller 41 Cutting device. 9. The cutting device according to claim 8, wherein the skin roll R is disposed on both sides of the contact roller 41 in the original roll R, and the skin Rs extends from the first edge R <b> 1 to the second edge R <b> 2. An apparatus for cutting the surface of an original roll, further comprising a pair of parallel pressing bars 44 pressed toward the center in the direction Z.