JP2014222595A - Sheet winding apparatus and sheet winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet winding device and method by which a sheet can easily be pulled off from a winding core without producing any foreign matter.SOLUTION: A sheet winding apparatus is able to wind a conveyed sheet 2 around a winding core 4 and pull off the wound sheet 2 from the winding core 4. The winding core 4 has a fluid passage 5 in a radial direction thereof and is able to increase or decrease the outer circumferential length thereof. The sheet winding apparatus includes: a nip roller 6 that presses the surface of a sheet 2 during the pulling off of the sheet from the winding core 4; and fluid suction/emission means that emits a fluid from the fluid passage 5 when a sheet 2 is pulled off from the winding core 4. When the fluid suction/emission means emits the fluid, the length of the outer circumference of the winding core 4 is decreased, and a gap is made between the winding core 4 and the sheet 2 (the outer circumference length L2 of the winding core<the innermost circumference length of a wound sheet 2), thereby eliminating friction resistance between the winding core 4 and the sheet 2 during the pulling off of the sheet.

Description

  The present invention relates to a sheet winding apparatus and a sheet winding method suitable for winding an electrode sheet or the like of a battery element.

Conventionally, there has been a sheet winding device described in Patent Document 1 as this type of technology.
This is a sheet winding apparatus provided with a discarding material winding mechanism capable of winding a sheet portion including a defective portion as a discarding material in a sheet conveying mechanism that conveys an electrode sheet to a winding means.

JP 2011-233279 A (paragraphs [0052] to [0088], FIGS. 3, 6, 8, and 9)

[Problem 1]
In the above prior art, a sheet wound as a discarded material is extracted from the core as follows.
That is, the sheet wound as a discarded material is inserted by inserting the extraction plate of the extraction mechanism into the slit of the core around which the sheet is wound, returning the discarded winding shaft unit to the retracted position, and removing the sheet from the core. Is removed from the core. For this reason, when the sheet is extracted from the core, a frictional resistance is generated between the core and the sheet, making it difficult to easily extract the sheet from the core. Further, since the sheet (discarded material) wound on the winding core is pulled out while being rubbed against the winding core, foreign matters are generated by this rubbing. In particular, when the sheet is an electrode sheet of a battery element, foreign matter generation such as peeling of the active material applied thereto occurs.

Furthermore, as described above, it is difficult to remove the sheet from the core due to the frictional resistance between the core and the sheet, so that the above-described generation of foreign matter is unavoidable even if a cover is provided near the core. It is inevitable that foreign matter enters the sheet transport mechanism side.
In the prior art, no consideration has been given to the occurrence of foreign matter as described above and the influence of the occurrence of this foreign matter on the other sheet conveying mechanism side, and an improvement in this respect has been desired.

[Problem 2]
In addition, in the conventional technology, when the waste material winding process is performed, if the sheet as the waste material is started to be wound on the core, and the sheet is released from the sheet supply mechanism at the same time, the tension is applied to the sheet by a tension applying unit or the like. Is given, there is a possibility that the sheet inserted into the slit comes off and cannot be wound up. Therefore, it is conceivable that no tension is applied to the sheet. However, winding in a state where no tension is applied does not stabilize the winding state, and winding deviation occurs particularly in the initial stage of winding. Even when tension is applied to the sheet, the sheet conveyance speed and the sheet tension at the time of winding the discarded material are different from those at the time of manufacturing the regular product, and this also causes a winding deviation. For this reason, there is a possibility that a deviation occurs in the sheet position (the sheet position in the direction intersecting the sheet conveying direction) after winding the discarded material. When the sheet position is shifted, the winding of the sheet is started in a state where the sheet position is shifted at the time of manufacturing the next regular product, that is, at the time of winding the next sheet.
In the prior art, no consideration is given to the occurrence of such sheet misalignment, and an improvement in this respect has been desired.

[Problem 3]
Further, it is preferable that the scraping material winding mechanism is of a super saving type. In particular, in a sheet winding apparatus that winds a plurality of sheets stacked on a single core as in the prior art, a waste material winding mechanism (individual waste material winding mechanism) is installed unless it is reduced in space. Becomes difficult.
In the conventional waste material winding mechanism, the recovery hopper and the extraction mechanism are installed below the sheet conveying line. However, it is actually very difficult to install at this position. In addition, in the discarded material winding mechanism, the winding core has a double-sided structure, and installation of the receiving portion is extremely difficult in terms of space. Therefore, it is conceivable to make the core a cantilever structure, but the rigidity of the core having a slit varies greatly depending on the phase (rotation angle) of the core. In particular, in the state where the slit is directed in the vertical direction, the rigidity of the core is extremely lowered as compared with the state in which the slit is directed in the left-right direction. Shift).
In the prior art, no consideration has been given to a space saving without causing such winding deviation, and an improvement in this respect has been desired.

  The present invention has been made in view of the above-described problems, and can easily remove a sheet from a core without generating foreign matter, and suppress the influence of foreign matter generation when the sheet is removed from the core. It is another object of the present invention to provide a sheet winding apparatus and a sheet winding method that can suppress the occurrence of sheet position deviation.

The said subject is solved by making a sheet | seat winding apparatus and a sheet | seat winding method into the structure of each following aspect.
As with the claims, each aspect is divided into sections, each section is numbered, and is described in a form that cites the numbers of other sections as necessary. This is merely for the purpose of facilitating the understanding of the present invention, and the technical features described in this specification and combinations thereof should not be construed as being limited to those described in the following sections. . In addition, when a plurality of items are described in one section, it is not always necessary to employ the plurality of items together, and it is also possible to take out only a part of the items and employ them.

  Of the following items, (1) is in claim 1, (2) is in claim 2, (3) is in claim 3, (4) is in claim 4, (5) The term corresponds to claim 5, the (6) term corresponds to claim 6, the (7) term corresponds to claim 7, the (8) term corresponds to claim 8, and the (9) term corresponds to claim 9. .

(1) A sheet winding apparatus for winding a belt-like sheet fed from a raw fabric roll and transported on a transport path around a core, and the core wound with the sheet wound around its outer peripheral surface A nip roller that is formed with a fluid passage for separation and further provided with an outer peripheral length increasing / decreasing mechanism that increases or decreases the outer peripheral length of the core, and presses or separates the surface of the sheet wound around the core. Is disposed opposite to the core, and when the sheet is pulled out of the core, the fluid is discharged from the fluid passage of the core to separate the sheet from the core, and the outer peripheral length increase / decrease mechanism A sheet winding device characterized in that the outer peripheral length is reduced from the winding time.
(2) The core includes a core body and a member that is incorporated in the core body and that is driven by the outer peripheral length increasing / decreasing mechanism to increase or decrease the outer peripheral length of the core ( The sheet winding apparatus according to item 1).
(3) When the sheet is wound around the core, the fluid passage of the core is depressurized to adsorb the sheet to the core, and the outer peripheral length of the core is increased by the outer peripheral length increasing / decreasing mechanism, and the nip roller The sheet winding apparatus according to (1) or (2), wherein the sheet is wound around a core while pressing the surface of the sheet.
(4) The shift of the edge position of the sheet before and after being wound around the core for a predetermined length is obtained, and the core is axially moved while being pressed against the core by the nip roller. A sheet position deviation correcting device is provided, which moves by the amount of deviation and returns to the normal position, cuts the sheet upstream of the conveyance direction, and positions the leading end position of the sheet to be wound next time at the normal position. The sheet winding apparatus according to any one of items (1) to (3).
(5) The core is a core that enters the transport path and winds up the NG sheet when the transported sheet is an NG sheet including a defective portion. The sheet winding apparatus according to any one of (4).
(6) At least the winding core for winding up the NG sheet and the nip roller are configured to be movable integrally as an NG sheet discharge unit, and the NG sheet is wound around the winding core for a predetermined length and is wound around the winding core by the nip roller. An NG sheet discharge unit moving device is provided that moves the NG sheet discharge unit to a unit storage area isolated from the transfer path after being cut and held upstream in the transfer direction. The sheet winding apparatus according to (5).
(7) The sheet winding apparatus according to (6), wherein the NG sheet discharge unit moving device is also used as a means for moving a winding core in the sheet position deviation correcting device in an axial direction.
(8) A sheet winding method in which a belt-like sheet fed from a raw roll is wound around a core, and the wound sheet can be extracted from the core. When the sheet is extracted from the core, the core A sheet winding method characterized in that fluid is discharged from a fluid passage formed in the sheet to separate the sheet from the core, and the outer peripheral length of the core is reduced from that during winding.
(9) When the sheet is wound around the core, the fluid passage of the core is depressurized to adsorb the sheet to the core, and the outer peripheral length of the core is increased, and the surface of the sheet is pressed by the nip roller. The sheet winding method according to item (8), wherein the sheet is wound around a winding core.

According to the invention described in item (1), it is possible to provide a sheet winding apparatus that can easily and without the generation of foreign matter from a core wound around the core (see [Problem 1] above). Solvable).
According to the invention described in the item (2), the configuration for increasing or decreasing the core outer peripheral length in the invention described in the item (1) can be realized relatively easily.
According to the invention described in the item (3), in the invention described in the item (1) or (2), it is possible to prevent the occurrence of winding deviation in the initial stage of winding, and the position of the sheet after winding the sheet. Deviation can be prevented (the above [Problem 2] can be solved).
According to the invention described in the item (4), in the inventions described in the items (1) to (3), the sheet position deviation due to the occurrence of the winding deviation can be corrected (the above [Problem 2] can be solved).
According to the invention described in item (5), the sheet winding device according to items (1) to (4) according to the NG sheet can be provided.
According to the invention described in item (6), in the invention described in item (5), since the sheet can be extracted from the core in the unit storage area isolated from the conveyance path, foreign matter is generated when the sheet is extracted from the core. Even if there is, it is possible to avoid the influence of the occurrence of foreign matter on the outside world on the other sheet conveying mechanism side (the above [Problem 1] can be solved).
According to the invention described in item (7), the sheet misalignment correction apparatus in the invention described in item (6) can be configured at low cost.
According to the invention described in item (8), it is possible to provide a sheet winding method in which a sheet wound around a winding core can be easily removed from the winding core without generating foreign matter (see above in the sheet winding method). [Problem 1] can be solved).
According to the invention described in item (9), in the sheet winding method described in item (8), it is possible to prevent the occurrence of winding deviation at the initial winding stage, and to prevent the deviation of the sheet position after winding the sheet. Occurrence can be prevented (in the sheet winding method, the above [Problem 2] can be solved).

In the sheet winding method concerning this invention, it is explanatory drawing at the time of the winding start to the core of a sheet | seat, (a) is whole explanatory drawing, (b) is principal part explanatory drawing. It is explanatory drawing when extracting a sheet | seat from a core in the method same as the above, (a) is whole explanatory drawing, (b) is principal part explanatory drawing. It is a figure showing one embodiment of a sheet winding device concerning the present invention. It is a perspective view which shows the winding core in FIG. FIG. 5 is a cross-sectional view of the core shown in FIG. 4 and shows an increase in the outer peripheral length of the core. Similarly, in a cross-sectional view, the time when the outer peripheral length of the core is decreased is shown. Similarly, it is a longitudinal sectional view, and shows an increase in the outer peripheral length of the core. Similarly, it is a longitudinal sectional view, and shows the time when the outer peripheral length of the core is reduced. It is a perspective view which shows an example of the core and the nip roller structural part in FIG. It is a top view which shows the outline at the time of winding of the NG sheet | seat of the sheet winding apparatus which concerns on this invention. It is a top view which shows the outline at the time of extraction from the core of the similarly wound NG sheet | seat. It is a perspective view which shows the example of the component by which a winding core, a nip roller, a winding core rotation mechanism, a nip roller raising / lowering mechanism, etc. are united. It is a perspective view which shows the example of a structural part same as the above at the time of sheet | seat winding operation | movement. It is a flowchart which shows operation | movement of one Embodiment of this invention sheet winding apparatus shown in FIGS.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol shows the same or an equivalent part between each figure.
As illustrated in FIGS. 1A and 1B, the sheet winding method according to the present invention is a belt-like shape that is unwound from an original roll 1 (arrow A) and is conveyed (arrow A) along a conveyance path 3. The sheet 2 is wound around the core 4 (arrow c), and the wound sheet 2 can be removed from the core 4, and the core 4 has a fluid passage 5 in the radial direction. The outer peripheral length L is formed so that it can be increased or decreased. That is, as can be seen from FIGS. 1B and 2B, the fluid passage 5 is provided in the radial direction, and the outer peripheral length L can be increased or decreased (L1>L2; L1 ← L2, L1 → L2). The formed core is used as the core 4 around which the sheet 2 is wound.
When the wound sheet 2 is extracted from the core 4, as illustrated in FIGS. 2A and 2B, fluid discharge (arrow O) is performed using the fluid passage 5, and the core is 4 is a sheet winding method in which the outer peripheral length L of 4 is reduced (L1 → L2).
According to this, the above-mentioned [Problem 1] can be solved.
In other words, when fluid is discharged using the fluid passage 5, the sheet 2 wound around the core 4 acts in a direction away from (removes from) the core 4, and the outer periphery of the core 4 and the core 4 are applied. A gap is generated between the innermost circumferences of the wound sheet 2. In this state, if the outer peripheral length L of the core 4 is reduced (L1 → L2), the gap is further widened, and without causing frictional resistance between the core 4 and the sheet 2, it is thus easy and foreign matter can be removed. The sheet 2 can be extracted from the core 4 without being generated.
When the wound sheet 2 is removed from the core 4, the nip roller 6 is in contact (arrow D: released) without pressing the surface of the sheet 2, and the wound sheet 2 is not separated. I am doing so.

Further, the sheet winding method according to the present invention is the above-described sheet winding method, and when the winding of the sheet 2 around the core 4 is started, as shown in FIGS. 4, the nip roller 6 is pressed against the surface of the sheet 2 wound around the arrow 4 (arrow D), and the fluid passage 5 is used to suck the fluid (arrow arrow) to depressurize the fluid path 5. This is a sheet winding method for adsorbing to a sheet.
That is, when the winding of the sheet 2 around the core 4 is started, the nip roller 6 is pressed against the surface of the sheet 2 wound around the core 4 to stop the sheet 2 on the core 4. Further, when the sheet 2 is stopped to the core 4 by the nip roller 6, the fluid passage 5 formed in the core 4 is used to suck in fluid (arrow arrow), the fluid path 5 is decompressed, and the sheet 2 is adsorbed to the core 4. Thus, the sheet 2 is stopped on the core 4 in the circumferential direction of the core 4.
According to this, the above-mentioned [Problem 2] can be solved.
That is, even if tension (arrow key) is applied to the sheet 2, the winding of the sheet 2 around the core 4 can be reliably started. Further, the sheet winding state is stabilized, and in particular, it is possible to prevent the occurrence of winding deviation at the initial stage of winding and to prevent the occurrence of deviation of the sheet position (position in the direction intersecting the sheet conveying direction) after winding the sheet.
Note that the outer peripheral length L of the core 4 is in an increased state (L1) from the start of winding of the sheet 2 to the core 4 until the end of winding.
In the example shown in FIG. 1 and FIG. 2, the core 4 is composed of a core body 52 and a pair of rod-shaped members 53, 53 whose outer cross-sectional shape is substantially round and whose form is unchanged. Inside the core 4 (core body 52), a hollow portion 51 is formed which communicates with the atmospheric space via the fluid passage 5.
In the following description, the terms “winding” and “winding” are used in the case where the sheet 2 wound around the core 4 is an NG sheet (disposal material).

Hereinafter, an embodiment of a sheet winding apparatus to which the above-described method of the present invention is applied will be described with reference to FIGS.
A sheet winding apparatus according to an embodiment of the present invention (hereinafter abbreviated as a sheet winding apparatus of the present invention) is, for example, as shown in FIG. 3, a main sheet winding for producing a battery element used in a lithium ion battery or the like. Built in the rotation device 31.
That is, the main sheet winding device 31 includes electrode sheet conveyance paths 35 and 3 for conveying the strip-like positive and negative electrode sheets 32 and 2 and separator sheet conveyance paths 36 and 37 for conveying the strip-shaped separator sheets 33 and 34. ing. The sheets 32 to 34 and 2 that transport the sheet transport paths 35 to 37 and 3 are wound as battery elements (products) in a state of being overlapped by the main sheet winding mechanism 41.
A book that moves forward and backward as necessary with respect to the electrode sheet conveyance paths 35 and 3 on the side of the electrode sheet conveyance paths 35 and 3 at the position closest to the main sheet winding mechanism 41 (in the direction intersecting the plane shown in the drawing). Invention sheet winding devices 42 and 43 are provided as NG sheet discharge mechanisms (individual discarded material winding mechanisms in the prior art).

In FIG. 3, the sheet winding device 43 of the present invention enters only the electrode sheet conveyance path (hereinafter abbreviated as conveyance path) 3 side of the negative electrode sheet (hereinafter abbreviated as sheet) 2. The sheet winding device 42 of the present invention on the conveyance path 35 side of the positive electrode sheet 32 is not shown. Therefore, the present invention sheet winding device 43 only on the side of the conveyance path 3 related to the sheet 2 will be described here.
In the sheet winding device 43 of the present invention, a portion including a defective portion such as a joint portion or a foreign matter adhesion portion in the belt-like sheet 2 conveyed through the conveyance path 3 is wound around the core 4 as an NG sheet (discarding material). The taken and wound NG sheet 2 can be extracted from the core 4. Specifically, the sheet portion L1 from the current sheet winding position to the position slightly past the defective portion (NG marking 26 position) can be wound around the core 4 as an NG sheet and extracted from the core 4.
In FIG. 3, an original fabric roll 1 is a sheet roll that feeds and feeds the sheet 2 to the transport path 3 in a strip shape.
The tension applying unit 22 is a unit that applies tension to the sheet 2 so that the sheet 2 does not meander (position shift) during conveyance. The sheet position control unit 23 is a unit that corrects when the sheet 2 meanders. The cutter sheet feeding unit 24 is a unit that feeds the sheet 2 to the core 41 of the main sheet winding device 31 at the start of sheet winding and cuts the sheet 2 at the end of winding. The sheet feeding unit with cutter 24 also feeds the NG sheet 2 to the sheet winding device 43 at the start of winding of the NG sheet 2 and cuts the NG sheet 2 at the end of winding. These units 22 to 24 are included in the conveyance path 3.
The NG marking sensor 25 is a sensor that detects when an NG marking (marking indicating a defective portion such as a joint portion or a foreign matter adhesion portion) 26 is attached to the sheet 2 fed out from the raw roll 1. .

As shown in FIGS. 4 to 8, the core 4 of the sheet winding device 43 of the present invention has a plurality of fluid passages 5 in the radial direction of a cross section (transverse cross section) orthogonal to the axial direction, and the outer peripheral length thereof. Can be increased or decreased (increase / decrease). A hollow portion 51 that communicates with the atmospheric space via the fluid passage 5 is formed inside the core 4.
Increasing or decreasing the outer peripheral length of the core 4 is made possible by configuring the core 4 with a core body 52 and a pair of rod-shaped members 53 and 53.
In this case, the core body 52 has a substantially round outer shape in cross section and the form is unchanged, and its rear end is fixed to the base 58. The rod-shaped members 53 and 53 are incorporated in both sides of the core body 52 along the axial direction of the core body 52 so that the opposing surfaces of both front end portions 53b and 53b can be opened and closed at the rear end portions 53a and 53a. The base 58 is pivotally supported.
The rod-shaped members 53 and 53 are configured so that the opposing surfaces of both the tip portions 53b and 53b are normally opened by the tension spring 54 inserted and fixed between the opposing surfaces of the both tip portions 53b and 53b. Yes. In the state in which the opposing surfaces of both end portions 53b, 53b of the rod-shaped members 53, 53 are open, the outer surfaces of the rod-shaped members 53, 53 are more than the outer peripheral surface of the core body 52, as shown in FIGS. The core 4 protrudes outward, and the outer peripheral length of the core 4 is maximum [L1: see FIG. 1 (b)].
Further, when the NG sheet 2 wound around the core 4 is extracted from the core 4, the rod-shaped members 53, 53 are formed by the pair of cam followers 55, 55 provided at the respective end portions 53 b, 53 b. It is configured so that the opposing surfaces of both tip portions 53b, 53b are closed against the tension force.
The tension spring 54 and the pair of cam followers 55, 55 together with a member (not shown) for driving the cam followers 55, 55 so that the opposing surfaces of both end portions 53b, 53b of the rod-shaped members 53, 53 are closed. An outer peripheral length increasing / decreasing mechanism for increasing / decreasing the outer peripheral length of the core 4 is configured.
In the state where the opposing surfaces of both end portions 53b, 53b of the rod-shaped members 53, 53 are closed, as shown in FIGS. 6 and 8, the outer surfaces of the rod-shaped members 53, 53 on the end portions 53b, 53b side are the winding cores. Withdrawing inward of the core 4 from the outer peripheral surface of the main body 52, the outer peripheral length of the core 4 becomes the minimum [L2: see FIG. 2 (b)].
7 and 8, X (dimension between the outer circumferences on the rod-shaped member rear end portions 53a, 53a side) and Y (dimension between the outer circumferences on the rod-shaped member tip end portions 53b, 53b side) are the core 4 shown in FIG. This indicates that X = Y when the outer peripheral length increases, and X> Y when the outer peripheral length of the core 4 shown in FIG. 8 decreases.
The core 4 has a cantilever structure that is supported only on the rear end side.

As shown in FIG. 9, the sheet winding device 43 of the present invention includes a nip roller 6 that is disposed opposite to the core 4 as described above and that can freely contact and separate on the surface of the sheet 2 wound around the core 4. The nip roller 6 is configured to press the surface of the sheet 2 from the start of winding of the sheet 2 to the core 4 until the end of winding, and the wound sheet 2 is removed from the core 4. In some cases, the surface of the sheet 2 is merely in contact without pressing. The nip roller 6 may be separated from the surface of the sheet 2 when the wound sheet 2 is extracted from the core 4.
In addition, when the winding of the sheet 2 around the core 4 is started, fluid is sucked using the fluid passage 5 to reduce the pressure of the fluid passage 5, and when the sheet 2 is extracted from the core 4, the fluid passage 5 is used to discharge the fluid. A fluid suction / discharge means 56 is provided.
The fluid is air here, and the fluid suction / discharge means 56 has a suction / discharge port 57 communicating with the hollow portion 51 of the core 4 and sucks air through the hollow portion 51 of the core 4 in the fluid passage 5. It is comprised so that it may discharge.

Further, as shown in FIGS. 9 to 11, the sheet winding device 43 according to the present invention includes the winding core 4 and the nip roller 6 constituting part (the main part of the NG sheet discharge unit) as one unit.
Then, when a winding deviation occurs in the initial stage of winding and the sheet position (sheet position in the direction intersecting the sheet conveying direction) is shifted at the end of winding of the NG sheet 2 onto the core 4, the sheet position The sheet misalignment correcting device 7 is provided so as to correct the misalignment (see FIGS. 10 and 11).
That is, in the vicinity of the core 4, a laser light sensor 71 for detecting the edge position 2a of the sheet 2 is provided integrally connected to the core 4, so that the sheet position deviation can be corrected.
The sheet position deviation correction device 7 detects the edge position 2a of the sheet 2 before and after the NG sheet 2 is wound around the core 4 by the laser light sensor 71, and obtains the deviation of the edge position 2a from the detected value. The state in which the NG sheet 2 wound about the sheet portion L1 (see FIG. 3) from the current sheet winding position to a position slightly past the position of the NG marking 26 is pressed and held on the core 4 by the nip roller 6. Then, it moves by the amount of deviation described above in the direction of the core 4 axis (see the arrow in FIG. 10) to return to the normal position. Then, the NG sheet 2 is cut by the sheet feeding unit 24 with a cutter on the upstream side in the transport direction, and the leading end position of the sheet 2 to be wound next time, particularly the sheet 2 in the production of a regular product, is positioned at the regular position (position correction). To do. Thereby, the sheet winding by the main sheet winding mechanism 41 relating to the next product (regular product) can be performed without deviation.
The sheet misalignment correcting device 7 includes a ball screw 72 and a motor 73 in addition to the laser light sensor 71.

As shown in FIGS. 10 and 11, the sheet winding device 43 of the present invention, after the NG sheet 2 is cut, passes through the opening 8 a of the partition wall 8 with the winding core 4 and the nip roller 6, An NG sheet discharge unit moving device 110 is provided so as to move to a unit storage area 9 isolated from the conveyance path 3 (see the arrow in FIG. 11).
In the illustrated example, the NG sheet discharge unit moving device 110 includes components such as a ball screw 72 and a motor 73 that move the components of the core 4 and the nip roller 6 in the axial direction of the core 4 in the sheet misalignment correction device 7. Combined use.
As described above, if the NG sheet 2 wound around the core 4 in the unit storage area 9 isolated from the conveyance path 3 is extracted, the foreign matter is not generated, and the influence of the foreign matter generation is influenced by another sheet conveyance mechanism. There is no effect on the side.
10 and 11, reference numeral 101 denotes a motor, and reference numeral 102 denotes a rotation transmission mechanism, which constitutes a core rotation mechanism 103 that rotates the core 4. The core rotation mechanism 103 is formed as one unit with the core 4 and the nip roller 6. Although not shown in FIGS. 10 and 11, the lifting mechanism of the nip roller 6 (the mechanism for contacting and separating the surface of the NG sheet 2 wound around the core 4) is also integrated with the core 4 and the nip roller 6. Yes. 10 and 11, a portion 100 surrounded by a broken line is a component (NG sheet discharge unit) that is made into one unit.

  FIG. 12 is a perspective view showing an example of an NG sheet discharge mechanism (the sheet winding device 43 of the present invention) in which the sheet misalignment correction device 7 and the NG sheet discharge unit moving device 110 are added to the NG sheet discharge unit 100. It is. FIG. 13 is a perspective view showing an example of the NG sheet discharge mechanism during the sheet winding operation. 12 and 13, reference numeral 121 denotes a lifting mechanism for the nip roller 6. The same reference numerals are given to the same or corresponding parts as in FIGS. 10 and 11, and the description of FIGS. 12 and 13 is omitted.

Next, the operation of the above-described sheet winding apparatus of the present invention will be described with reference to FIG.
In FIG. 3, when the main sheet winding mechanism 41 is currently winding (currently transporting) the current product (regular product), the next winding scheduled sheet 2 has the NG marking 26. It is assumed that the sensor 25 has detected (see step 201 in FIG. 14). Then, the winding of the sheet 2 for the current product (genuine product) is completed, the end portion thereof is cut by the sheet feeding unit 24 with cutter, and the production of the current product is completed (see step 202 in FIG. 14). At that time, the operation shifts to the winding operation of the NG sheet 2.
That is, the winding core 4 and the nip roller 6 constituting part (the main part of the NG sheet discharge unit) of the sheet winding device 43 of the present invention are conveyed from the side of the conveyance path 3 in a state where the nip roller 6 is not in contact with the winding core 4. , And stops at a standby position for receiving the start end portion of the NG sheet 2 held by the sheet feeding unit 24 with cutter. After the stop, the sheet feeding unit 24 with the cutter uses the sheet feeding function to transfer the starting end portion of the NG sheet 2 to the core 4 of the sheet winding device 43 of the present invention regardless of the hanging action due to the weight of the starting end portion of the NG sheet 2. And properly fed between the nip rollers 6. Next, the nip roller 6 is lowered to press the surface of the NG sheet 2 (see step 203 in FIG. 14), and the operation proceeds to the NG sheet winding start operation. The constituent parts of the winding core 4 and the nip roller 6 in FIG. 3 show a state immediately after the transition to the NG sheet winding start operation (just before the start of winding). From this state, winding of the NG sheet 2 onto the core 4 is started.

That is, as shown in FIGS. 1A and 1B, the nip roller 6 is pressed against the surface of the NG sheet 2 wound around the core 4 (arrow D), and the fluid passage 5 is used to draw fluid (arrow). And the fluid passage 5 is depressurized to adsorb the NG sheet 2 to the core 4. At this time, the rod-shaped members 53 and 53 are in a state in which the opposing surfaces of the both end portions 53b and 53b are open (see FIGS. 5 and 7), and the outer surfaces of both the rod-shaped members 53 and 53 are the outer periphery of the core body 52. It protrudes outward of the core 4 from the surface, and the outer peripheral length of the core 4 is maximum [L1: see FIG. 1 (b)].
By pressing the nip roller 6 against the surface of the NG sheet 2, the NG sheet 2 can be wound even if tension is applied to the NG sheet 2, and the NG sheet winding state is stabilized. Can prevent the occurrence of misalignment of the NG sheet after winding the sheet. Further, by adsorbing the NG sheet 2 to the core 4, it is possible to assist the stop of the NG sheet 2 to the core 4 in the circumferential direction of the core 4, and the NG sheet 2 is wound on the core 4. Can be started reliably.

The NG sheet 2 is wound around the core 4 with respect to the sheet portion L1 (see FIG. 3) from the current sheet winding position to a position slightly past the NG marking 26 (see step 204 in FIG. 14). Thereafter, the end portion of the NG sheet 2 is cut by the sheet feeding unit 24 with a cutter.
The position of the NG marking 26 can be calculated based on the detection timing of the NG marking 26 by the NG marking sensor 25 and the winding end timing of the sheet 2 for the current product (genuine product), and based on this calculation result, the end of the NG sheet 2 The portion is cut by the sheet feeding unit 24 with a cutter. By cutting, the core 4 can be extracted.
The sheet position deviation correction device 7 obtains the deviation of the sheet edge position 2a before and after the NG sheet 2 is wound around the core 4, and presses and holds the wound NG sheet 2 on the core 4 by the nip roller 6. In this state, the core 4 is moved in the axial direction by the above-described deviation and returned to the normal position. And it cuts in the conveyance direction upstream of the NG sheet 2, and positions the front-end | tip position of the sheet 2 wound next time in a regular position. According to this, the sheet winding concerning the next product can be performed without deviation.

The core 4 around which the NG sheet 2 is wound and the nip roller 6 (main part of the NG sheet discharge unit) that presses the surface of the NG sheet 2 and maintains the wound state of the NG sheet 2 are isolated from the conveyance path 3. The unit storage area 9 is moved. The NG sheet 2 wound around the core 4 is extracted from the core 4 in the unit storage area 9 thus isolated from the conveyance path 3.
Here, when the NG sheet 2 is extracted from the core 4, as shown in FIG. 2A, fluid discharge (arrow O) is performed using the fluid passage 5. In addition, with the opposed surfaces of both end portions 53b and 53b of the rod-shaped members 53 and 53 closed (see FIGS. 6 and 8), the outer peripheral length of the core 4 is minimized [L2: see FIG. 2 (b)]. And
According to this, the NG sheet 2 wound around the core 4 acts in a direction away from (removes from) the core 4, and the NG sheet 2 wound around the outer periphery of the core 4 and the core 4. A gap is generated between the innermost circumferences (see FIGS. 2A and 8). In this state, if the outer peripheral length L of the core 4 is reduced (L1 → L2), the gap is further widened (see FIGS. 1B and 2B for L1 and L2), the core 4 and NG. The NG sheet 2 can be extracted from the core 4 without causing frictional resistance between the sheets 2 and thus easily and without generating foreign matter.
Note that the fluid suction and discharge means 56 (see FIG. 9) performs fluid suction and discharge through the fluid passage 5 through the hollow portion 51 of the core 4.

As described above, according to the sheet winding device 43 of the present invention, the following effects can be exhibited.
That is, when the NG sheet 2 is extracted from the core 4, as shown in FIG. 2A, fluid discharge is performed using the fluid passage 5, and the outer peripheral length L of the core 4 is reduced. A gap was created between the outer periphery of the sheet and the innermost periphery of the sheet 2 wound around the core 4.
According to this, the above-mentioned [Problem 1] can be solved. That is, the NG sheet 2 can be easily extracted from the core 4 without generating foreign matter.

At the start of winding the NG sheet 2 onto the core 4, the nip roller 6 was pressed against the surface of the NG sheet 2 wound around the core 4. In addition, fluid suction (decompression of the fluid passage 5) is performed using the fluid passage 5 to adsorb the NG sheet 2 to the core 4, and the stopper of the NG sheet 2 to the core 4 extends in the circumferential direction of the core 4. Helped.
According to this, the above-mentioned [Problem 2] can be solved. That is, even if tension is applied to the sheet, winding of the NG sheet 2 onto the core 4 can be reliably started. Further, the sheet winding state is stabilized, and in particular, the occurrence of winding deviation at the initial stage of winding can be prevented, and the occurrence of deviation of the sheet position (position in the direction intersecting the sheet conveying direction) after the NG sheet winding can be prevented.
In addition, when the NG sheet 2 is wound around the core 4, winding deviation occurs, and when the NG sheet 2 is wound on the winding core 4, the sheet position is shifted. The misalignment correcting device 7 corrects it. Therefore, the sheet winding by the main sheet winding mechanism 41 relating to the next product (regular product) can be performed without deviation (the above [Problem 2] can be solved).

  Furthermore, since the NG sheet discharge unit moving device 110 is provided so that the NG sheet 2 can be extracted from the core 4 in the unit storage area 9 isolated from the conveyance path 3, a foreign object is removed when the NG sheet 2 is extracted. Even if the occurrence occurs, it is possible to avoid the influence of the generation of foreign matter on the outside world on the other sheet conveying mechanism side (the above [Problem 1] can be solved).

Further, according to the sheet winding device 43 of the present invention, the constituent parts of the core 4 and the nip roller 6 are unitized (integrated) and are provided below the conveying path 3 (for example, a conventional waste material winding unit). There is no recovery hopper etc. in the mechanism, and the winding core 4 is a cantilever structure and has a super saving shape.
According to this, the above-mentioned [Problem 3] can be solved. That is, the sheet winding device 43 of the present invention is an NG sheet discharging mechanism (mainly individual discarded material winding mechanism) in a main sheet winding mechanism 41 that winds a plurality of sheets 2 on a single core 4. It becomes possible to install as. This is the same not only when the core 4 has a cantilever structure as in the illustrated example, but also when the core 4 has a double-sided structure. Further, even if the core 4 has a cantilever structure, since there is no slit as in the prior art, the core 4 does not undergo a large deflection due to the tension applied to the sheet 2, and the winding deviation caused by this deflection is not caused. There is no occurrence of (sheet winding position shift).

  1: raw fabric roll, 2: sheet, NG sheet, 2a: edge position, 3: transport path, 4: winding core, 5: fluid passage, 6: nip roller, 7: sheet position deviation correction device, 8: partition wall, 9 : Unit storage area, 26: NG marking, 52: core body, 53: rod-like member, 56: fluid suction / discharge means, 100: NG sheet discharge unit, 110: NG sheet discharge unit moving device.

Claims (9)

A sheet winding device that winds a belt-shaped sheet fed from a raw roll and transported on a transport path around a core,
The winding core is provided with a fluid passage for adsorbing and releasing the sheet wound on the outer peripheral surface thereof, and further provided with an outer peripheral length increasing / decreasing mechanism for increasing / decreasing the outer peripheral length of the core,
A nip roller that presses or separates the surface of the sheet wound around the core is disposed opposite the core,
When the sheet is removed from the core, the sheet is removed from the core by discharging fluid from the fluid passage of the core, and the outer peripheral length of the core is reduced by the outer peripheral length increase / decrease mechanism from the winding time. A sheet winding device that features   The winding core comprises: a winding core body; and a member that is incorporated in the winding core body and that is driven by the outer circumferential length increasing / decreasing mechanism to increase or decrease the outer circumferential length of the winding core. The sheet winding apparatus according to the description. When winding a sheet around a core, the fluid passage of the core is depressurized to adsorb the sheet to the core, and the outer peripheral length increase / decrease mechanism increases the outer peripheral length of the core,
The sheet winding apparatus according to claim 1 or 2, wherein the sheet is wound around a core while pressing the surface of the sheet with the nip roller. Find the deviation of the edge position of the sheet before and after being wound around the core for a predetermined length,
While the sheet wound for a predetermined length is pressed and held on the core by the nip roller, the core is moved in the axial direction by the amount of deviation and returned to the normal position, and cut on the upstream side in the conveying direction. The sheet winding apparatus according to any one of claims 1 to 3, further comprising a sheet position deviation correction device that positions a leading end position of the wound sheet at a normal position.   The winding core is a winding core that enters the conveyance path and winds up the NG sheet when the conveyed sheet is an NG sheet including a defective portion. The sheet winding apparatus according to claim 1. At least the winding core for winding the NG sheet and the nip roller are configured to be integrally movable as an NG sheet discharge unit,
The NG sheet is wound around the core for a predetermined length, and is pressed and held on the core by the nip roller. After being cut upstream in the transport direction, the unit sheet is separated from the transport path. The sheet winding apparatus according to claim 5, further comprising an NG sheet discharge unit moving device that moves the NG sheet discharge unit.   The sheet winding apparatus according to claim 6, wherein the NG sheet discharge unit moving device is also used as a means for moving a winding core in the sheet position deviation correcting device in an axial direction. It is a sheet winding method in which a belt-like sheet fed from a raw roll is wound around a core, and the wound sheet can be extracted from the core,
When the sheet is pulled out from the core, fluid is discharged from the fluid passage formed in the core and the sheet is detached from the core, and the outer peripheral length of the core is reduced from the winding time. Sheet winding method to do. When winding a sheet around a core, the fluid passage of the core is depressurized to adsorb the sheet to the core, and the outer peripheral length of the core is increased,
The sheet winding method according to claim 8, wherein the sheet is wound around a core while pressing the surface of the sheet with the nip roller.

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