JP5015761B2 - Folding laminate top piece folding method and folding laminate top piece folding device - Google Patents

Description

  The present invention relates to a method for folding an uppermost piece of a folded laminate and an apparatus for folding the uppermost piece of a folded laminate.

Sanitary tissue paper products in which sanitary tissue paper such as tissue paper, paper towels and kitchen paper are bundled and stored in a storage box are well known.
In this type of product, for example, as in Patent Document 1 and Patent Document 2, an inner surface of a paper box having an elliptical ring-shaped perforation line at the center of the upper surface is covered with the perforation line so that a slit is formed. A sanitary thin paper storage box having a structure to which a colorless and transparent resinous film is attached is used.
In use, the annular perforation is cut off to form a take-out opening on the top surface of the carton, and each of the sanitary thin papers stored inside through the slits of the resin film exposed in the take-out opening , Extract and use.
On the other hand, in the sanitary thin paper product used by taking out the sanitary thin paper one by one from the slit in this way, when the sanitary thin paper is taken out, a part of the subsequent one is placed inside so as to be exposed from the slit. A sanitary thin paper bundle is constructed.
This sanitary thin paper bundle generally has a laminated structure in which the sanitary thin paper is folded and the folded pieces are fitted to the adjacent lower and upper folded inner surfaces, and is called an interfolder. Manufactured with folding stacking equipment.
JP2002-249994 JP 2002-238799 A

However, when the sanitary thin paper bundle is manufactured with the interfolder, the edge of the folded piece located on the uppermost surface is located near the side edge of the bundle, so if it is placed in the storage box as it is, the outlet is formed in the storage box as described above Even so, the edge of this free piece is not exposed to the outlet.
Therefore, when taking out the first sheet, not the edge of the tissue paper but the surface must be picked, resulting in a product that is very difficult to pick.

Further, not only the topmost thin paper but also several thin papers below it are picked at the same time, so that a plurality of sheets are wasted at the start of use.
Therefore, it has been proposed that the uppermost free piece of the hygienic thin paper bundle is folded back so that the uppermost free piece is positioned at the center of the storage box where the take-out port is located. Such a complicated mechanism or a complicated process is required, which hinders the speeding up of the production of the sheet bundle.

In particular, when a sheet bundle is manufactured with a high-speed folding facility called a multi-stand type interfolder, it is difficult to employ because it becomes a factor that hinders the speeding up of the manufacturing.
Accordingly, a main object of the present invention is to provide a method and an apparatus that folds the edge of the uppermost piece located on the uppermost surface of the sheet bundle so as to be located at a predetermined position such as the center at a high speed.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A conveying plane for conveying a folded laminate having a laminated structure in which folded pieces of the folded sheet are alternately stacked so that the folded pieces of the folded sheet are fitted to adjacent lower and upper folded inner surfaces;
Lifting means for sucking and lifting the uppermost piece of the sheet constituting the uppermost surface located above the folded laminate moving on the conveying plane;
A crease guide having a lower guide edge extending in parallel with the conveying direction, the lower guide edge being in contact with a predetermined position on the upper surface side of the lifted uppermost piece;
It has an upper guide edge that is in contact with the lower surface side of the uppermost piece and overlaps with the crease guide, and overlaps with the crease guide in the process of overlapping the upper guide edge and the crease guide. And a folding guide that folds like
And a pressing means that presses at least the folding edge of the uppermost piece folded back along the fold guide by the folding guide and attaches a crease to the uppermost piece.

<Invention of Claim 2>
2. The uppermost piece folding device for a folded laminate according to claim 1, wherein the upper guide edge extends at a predetermined angle with respect to the lower guide edge.

<Invention of Claim 3>
The uppermost piece folding device for a folded laminate according to claim 2, wherein the upper guide edge is configured to be capable of adjusting a predetermined angle with respect to the lower guide edge.

<Invention of Claim 4>
The folding guide is configured to be able to reciprocate between an upper position of the crease guide and a position away from the fold guide, and the upper guide edge overlaps with the crease guide when moving from the removed position to the crease guide. The uppermost piece folding device for a folded laminate according to any one of claims 1 to 3, wherein the uppermost piece folding device is configured to fold a part of the uppermost piece of the laminate.

<Invention of Claim 5>
Folded laminates having a laminated structure in which folded pieces of folded sheets are alternately stacked so that the folded lower and upper folded inner surfaces are adjacent to each other are conveyed with their folded edges along the traveling direction;
In the conveying process, the uppermost piece of the sheet constituting the uppermost surface is sucked and lifted from above the folded laminate,
The guide edge of the crease guide having a guide edge parallel to the traveling direction is brought into contact with a predetermined position on the upper surface side of the lifted uppermost piece,
A part of the uppermost piece on the edge side from the guide edge is folded so as to overlap the crease guide to form a folded edge along the guide edge on the uppermost piece;
Only the folded laminate is transported to the subsequent stage in a state in which a part of the top piece is folded,
A method for folding back the uppermost piece of the folded laminate, characterized in that after that, the folding edge of the uppermost piece folded back along the crease guide is pressed from above to crease it.

<Invention of Claim 6>
Folded laminates having a laminated structure in which folded pieces of folded sheets are alternately stacked so that the folded lower and upper folded inner surfaces are adjacent to each other are conveyed with their folded edges along the traveling direction;
In the conveying process, the uppermost piece of the sheet constituting the uppermost surface is sucked and lifted from above the folded laminate,
With the folding guide having an upper guide edge coming in contact with the lower surface side of the lifted uppermost piece and projecting toward the center in the width direction of the folded laminate as it goes toward the downstream side, the raised edge side of the uppermost piece is folded back, The guide edge of the crease guide having a guide edge parallel to the traveling direction is brought into contact with the folded inner surface,
A part of the uppermost piece on the edge side from the guide edge is folded so as to overlap the crease guide to form a folded edge along the guide edge on the uppermost piece;
Only the folded laminate is transported to the subsequent stage in a state in which a part of the top piece is folded,
A method for folding back the uppermost piece of the folded laminate, characterized in that after that, the folding edge of the uppermost piece folded back along the crease guide is pressed from above to crease it.

  As described above, according to the present invention, there is provided a method and an apparatus for folding back so that the edge of a free piece positioned on the uppermost surface of a folded laminate is easily positioned at the center.

Next, embodiments of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a schematic view of an apparatus X1 that folds the uppermost piece 1U located on the uppermost surface of the folded laminate 1 of the present invention. 2 to 7 are schematic views taken along arrows II-II to VII-VII in FIG. 1, and parts unnecessary for description are omitted. In these figures, the back side of the paper is downstream.

  The device X1 of the present invention is a device that folds the uppermost piece 1U located on the uppermost surface of the folded laminate 1 and positions the edge 1A of the uppermost piece 1U at a predetermined position such as the center of the folded laminate 1.

  Here, as shown in FIG. 2, the folded laminate 1 targeted by the present invention has a laminated structure in which the folded pieces of the folded sheet are alternately stacked so that the folded pieces are fitted to the adjacent lower and upper folded inner surfaces. It is used for a product in a so-called pop-up format in which when one sheet is taken out, a part of the succeeding sheet is pulled out of the storage box.

In the present invention, the material and physical properties of the sheet are not particularly limited, but examples of suitable sheets include sanitary thin paper such as tissue paper and kitchen paper, synthetic fiber mixed paper, and non-woven sheet.
These folded laminates 1 can be preferably manufactured by a known interfolder. The format of the interfolder is not particularly limited, but it is possible to increase the manufacturing speed as an effect of the present invention. Therefore, it is effective to use a multi-stand interfolder or a high-speed interfolder called a PCMC facility. It is.

The apparatus X1 of the present invention includes a transport plane 10 on which the folded laminate 1 is placed and transported. The conveyance plane 10 is configured by, for example, a conveyance conveyer that conveys a descending laminate that is continuously sent from the above-described interfolder. As the conveyor, for example, a belt conveyor configured by winding an endless belt 12 between a pair of rollers including at least one drive roller 11 can be used. Note that the transport plane 10 may be configured using a moving transport table that slides the stacking plane as it is.
The folded laminate 1 is transported by the transport plane 10 so that the folded edge 1B is along the traveling direction.

On the other hand, in the apparatus X1 of the present embodiment, a vacuum belt 20 provided with a suction surface facing the transport plane 10 is disposed at a predetermined upper position of the transport plane 10.
The arrangement position of the vacuum belt 20 is one edge side in the width direction of the transport plane 10, and the edge 1 A side of the uppermost piece 1 U of the folded laminate 1 is located on the vacuum belt 20 arrangement position side. By transporting on the transport plane, the uppermost piece 1U of the folded laminate 1 on the transport plane is lifted by suction by the vacuum belt 20, and in this state, the folded stack 1 is transported to the subsequent stage.

In this embodiment, a vacuum belt 20 having a known configuration configured to be able to suck outside air or the like from a part of the belt surface can be used. For example, at least a pair of rotatable rollers, one or more driving rollers, an endless belt made of a breathable material or a ventilation hole wound between them, and an endless belt are included. And a suction device 21 that forms a suction region by making a part of the plane negative pressure.
The specific suction force in the vacuum belt 20 is adjusted so that only the uppermost piece 1U of the folded laminate 1 is lifted. If the suction force is too strong, the sheets other than the top piece are peeled off from the laminate main body, and if the suction force is small, the top piece 1U cannot be lifted sufficiently.

  The setting of the suction force may be appropriately designed according to the basis weight of the sheet, the distance between the folded laminate 1 and the suction surface, the size of the folded laminate 1, and the like. As an example of a suitable lifting amount, it is preferable that the edge of the uppermost piece is lifted by about 3 to 20 mm, preferably about 5 to 10 mm.

  Further, the speed of the vacuum belt 20 may be the same as the moving speed of the transport plane 10, and in this way, the folded laminate 1 can be transported to the subsequent stage while lifting the uppermost piece 1U.

On the other hand, in the apparatus X1 of the present invention, a flat crease guide having a lower guide edge 30e extending in the same direction as the conveying direction (in the direction of the arrow in the drawing) so as to be continuous with the rear stage of the vacuum belt 20. 30.
The crease guide 30 is arranged so that the lower guide edge 30e is in contact with a predetermined position on the upper surface side of the uppermost piece 1U lifted by the vacuum belt 20, and the upper surface is substantially parallel to the transport plane 10. .

Further, the fold line guide 30 is located upstream of the lower guide edge 30e so that, when the folded laminate 1 is transported downstream, the upstream end edge hits the raised portion of the uppermost piece 1U and does not interfere with the transport. The end position is formed so as to be in a standing position from the suction region of the vacuum belt 20.
Specifically, the crease guide 30 can be configured by fixing a flat guide plate at a position having a predetermined positional relationship with the conveyance plane 10. Further, for example, a flat guide plate and known moving means for horizontally moving the guide plate are in a direction perpendicular to the conveyance plane, and from the folding edge side of the sheet constituting the uppermost piece to the edge side of the uppermost piece. You may comprise so that it may protrude in predetermined width on a conveyance plane so that it may face.

On the other hand, the apparatus X1 of the present invention has an upper guide edge 40e that is in contact with the lower surface side of the uppermost piece 1U and overlaps the fold guide 30 above, and the upper guide edge 40e and the fold guide 30 In the overlapping process, a folding guide 40 is provided to fold back a part of the uppermost piece 1U so as to overlap the fold guide.
In the apparatus X1 shown in the drawing, the folding guide 40 has a flat plate shape and is arranged so that the amount of protrusion onto the crease guide increases from the upstream side to the downstream side, and the upper guide edge 40e is the lower guide edge 30e. Is formed so as to extend at a predetermined angle with respect to. The predetermined angle means an appropriate angle of the intersection angle α between the upper guide edge and the lower guide edge in plan view. For example, this preferred predetermined angle is 5 to 45 degrees, preferably 10 to 30 degrees.
As the end guide 1A is transported downstream from the lower guide edge 30e of the fold guide 30 of the uppermost piece 1U by the folding guide 40, the lower guide edge position of the fold guide 40 is folded back upward as the folding edge 1e. It is.
Accordingly, the contact position of the lower guide edge 40e of the fold guide 40 with the uppermost piece 1U becomes a factor for determining the folding width. The degree to which this contact position is set is an appropriate design matter. For example, if the folding laminate 1 formed by the interfolder is configured so that the edge 1A of the uppermost piece 1U is substantially at the same position as the folding edge of the sheet one lower than that, When the lower guide edge 30e is brought into contact with the quarter of the width of the folded laminate 1, the end edge 1A of the uppermost piece 1U is positioned at the center in the width direction of the folded laminate.

On the other hand, the folding guide 30 can be moved so that the downstream end draws a circular arc trajectory with a predetermined position on the upstream side as a rotation axis, and a predetermined angle and a protruding amount with respect to the lower guide edge 30e of the upper guide edge 40e can be adjusted. It is said that. The folding width of the uppermost piece 1U is also adjusted by adjusting the folding guide.
The folding guide is configured such that, for example, an upper position of the crease guide and a position away from the fold guide can be reciprocated, and when the upper guide edge moves relative to the crease guide from the deviated position. Can be configured to overlap.

  On the other hand, in the apparatus X1 of this embodiment, as a suitable example, the folded laminate 1 is configured to be detached from the suction region of the vacuum belt 20 at a position where the folding is started by being guided by the folding guide 40. By doing so, a part of the folded uppermost piece 1U is not sucked again and lifted.

  On the other hand, both the crease guide 30 and the folding guide 40 are configured so as not to have a projection in the height direction with respect to the advancing direction, and come off between the sheets of the folded laminate 1 as the conveyance plane 10 moves. It is configured as follows.

  On the other hand, the device X1 of the present invention includes a pressure contact means that presses the uppermost surface of the folded laminate 1 in which the uppermost piece 1U is folded back (downstream position) after the fold line guide 30 and the folding guide 40.

In the illustrated apparatus X1, the pressure contact means is a press belt 50. The press belt 50 includes at least a pair of rotatable rollers, one or more driving rollers, and an endless belt wound between the rollers, and the press contact plane 51 facing the transport plane is a transport plane. It is configured to move in the same direction at the same speed. The separation distance between the pressure contact plane 51 and the transport plane 10 is adjustable, and the separation distance is less than the height of the folded laminate so that it passes between both planes. The pressure contact plane 51 is in pressure contact with the uppermost surface of the folded laminate 1 in which a part of the uppermost piece is folded back by the crease guide and the folding guide described above.
By this pressure contact, the folding edge 1e of the uppermost piece 1U is brazed, and the possibility that the uppermost piece 1U folded by the fold line guide 30 and the folding guide 40 returns to the original state is reduced.

  Thus, the folded laminate 1 is obtained in a state where the end edge 1A of the uppermost piece 1U located on the uppermost surface is folded back to a predetermined position.

<Other embodiments>
Next, a second embodiment of the present invention will be described. The second embodiment is an example in which the folding guide 40 comes into contact with the folded laminate 1 before the fold guide 30.

As shown in FIGS. 9 and 10, the apparatus X <b> 2 of the present embodiment includes a folded laminate 1 in which the upper guide edge 40 e of the folding guide 40 is lifted by the vacuum belt 20 before the lower guide edge 30 e of the fold guide 30. It is comprised so that the top piece 1U may be touched. Other configurations are the same as those in the first embodiment.
Therefore, in this apparatus X2, first, the upper guide edge 40e of the folding guide 40 contacts the lower surface side of the uppermost piece 1U lifted by the vacuum belt.

The upper guide edge is configured to form a predetermined angle with respect to the conveying direction so as to protrude toward the center in the width direction of the folded laminate as it goes downstream, so that the folded laminate 1 is directed downstream. In the process, the folding starts so that the folding width of the uppermost piece becomes larger.
On the other hand, the crease guide has a guide edge that is in contact with the inner surface of the fold and is parallel to the traveling direction in the process of widening the fold width.
Therefore, when the folding width reaches a predetermined width, the guide edge of the crease guide comes into contact with the inner surface of the folding, and an increase in the folding width downstream is suppressed, and folding of the predetermined width is performed.

  After this folding, as in the first embodiment, folding was applied by the press belt so that the edge 1A of the uppermost piece 1U located on the uppermost surface was folded to a predetermined position. A folded laminate 1 in a state is obtained.

  The present invention stores a sanitary thin paper laminate in which a plurality of sanitary thin papers such as kitchen paper, paper towels, and wipes for wiping for wiping are stacked in a storage box, from an outlet provided on the upper surface of the storage box It can be used for a sheet product having a configuration in which the uppermost sanitary thin paper is taken out one by one from the sanitary thin paper laminate.

It is the schematic for demonstrating the folding apparatus and the folding method of this invention. It is the schematic of the II-II arrow of FIG. It is the schematic of the III-III arrow of FIG. It is the schematic of the IV-IV arrow of FIG. It is the schematic of the VV arrow of FIG. It is the schematic of the VI-VI arrow view of FIG. It is the schematic of the VII-VII arrow of FIG. It is the schematic for demonstrating the other folding apparatus and folding method of this invention. It is the schematic of the IX-IX arrow of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Folding laminated body, 1U ... Uppermost piece of folding laminated body, 1A ... End edge of uppermost piece, 1B ... Folding edge of sheet constituting uppermost piece, 1e ... Folding edge of uppermost piece, 10 ... Conveyance plane, 20 ... Vacuum belt, 21 ... suction device, 30 ... fold guide, 30e ... lower guide edge, 40 ... folding guide, 40e ... upper guide edge, 50 ... press belt, 51 ... pressure contact plane, X1 ... folding device.

Claims (6)

A conveying plane for conveying a folded laminate having a laminated structure in which folded pieces of the folded sheet are alternately stacked so that the folded pieces of the folded sheet are fitted to adjacent lower and upper folded inner surfaces;
Lifting means for sucking and lifting the uppermost piece of the sheet constituting the uppermost surface located above the folded laminate moving on the conveying plane;
A crease guide having a lower guide edge extending in parallel with the conveying direction, the lower guide edge being in contact with a predetermined position on the upper surface side of the lifted uppermost piece;
It has an upper guide edge that is in contact with the lower surface side of the uppermost piece and overlaps with the crease guide, and overlaps with the crease guide in the process of overlapping the upper guide edge and the crease guide. And a folding guide that folds like
And a pressing means that presses at least the folding edge of the uppermost piece folded back along the fold guide by the folding guide and attaches a crease to the uppermost piece.   2. The uppermost piece folding device for a folded laminate according to claim 1, wherein the upper guide edge extends at a predetermined angle with respect to the lower guide edge.   The uppermost piece folding device for a folded laminate according to claim 2, wherein the upper guide edge is configured to be capable of adjusting a predetermined angle with respect to the lower guide edge.   The folding guide is configured to be able to reciprocate between an upper position of the crease guide and a position away from the fold guide, and the upper guide edge overlaps with the crease guide when moving from the removed position to the crease guide. The uppermost piece folding device for a folded laminate according to any one of claims 1 to 3, wherein the uppermost piece folding device is configured to fold a part of the uppermost piece of the laminate. Folded laminates having a laminated structure in which folded pieces of folded sheets are alternately stacked so that the folded lower and upper folded inner surfaces are adjacent to each other are conveyed with their folded edges along the traveling direction;
In the conveying process, the uppermost piece of the sheet constituting the uppermost surface is sucked and lifted from above the folded laminate,
The lower guide edge of the crease guide having a lower guide edge parallel to the traveling direction is brought into contact with a predetermined position on the upper surface side of the lifted uppermost piece,
A part of the top piece on the edge side from the lower guide edge is folded back so as to overlap the crease guide to form a folded edge along the guide edge on the top piece;
Only the folded laminate is transported to the subsequent stage in a state in which a part of the top piece is folded,
A method for folding back the uppermost piece of the folded laminate, characterized in that after that, the folding edge of the uppermost piece folded back along the crease guide is pressed from above to crease it. Folded laminates having a laminated structure in which folded pieces of folded sheets are alternately stacked so that the folded lower and upper folded inner surfaces are adjacent to each other are conveyed with their folded edges along the traveling direction;
In the conveying process, the uppermost piece of the sheet constituting the uppermost surface is sucked and lifted from above the folded laminate,
With the folding guide having an upper guide edge coming in contact with the lower surface side of the lifted uppermost piece and projecting toward the center in the width direction of the folded laminate as it goes toward the downstream side, the raised edge side of the uppermost piece is folded back, The guide edge of the crease guide having a guide edge parallel to the traveling direction is brought into contact with the folded inner surface,
A part of the uppermost piece on the edge side from the guide edge is folded so as to overlap the crease guide to form a folded edge along the guide edge on the uppermost piece;
Only the folded laminate is transported to the subsequent stage in a state in which a part of the top piece is folded,
A method for folding back the uppermost piece of the folded laminate, characterized in that after that, the folding edge of the uppermost piece folded back along the crease guide is pressed from above to crease it.

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