JPH04251073A - Four-folded zigzag folding device - Google Patents

Abstract

PURPOSE:To continuously manufacture a sheet product in a zigzagging folded state that a beltlike sheet material is four-folded in a direction extending at right angles with the conveying direction of the sheet material. CONSTITUTION:Beltlike sheet materials 1 and 1 making a pair continuously conveyed from a raw fabric are two-folded in a direction extending at right angles with a conveying direction through folding drums 2 and 2 located on both sides and making a pair and cut to a given size to form a two-folded sheet 11. The two-folded sheets are fed in belt conveyors 15 and 15 making a pair in a lateral direction. The two-folded sheets are overlapped with each other in a position, where the belts are positioned facing each other, and displaced from each other in a manner that the end part of the one sheet is positioned to the intermediate part of the other sheet. Thereafter, the two-folded sheets are fed to a subsequent zigzag folding drum 23. At the zigzag folding drum, the two-folded sheets are folded alternately in a zigzagging state such that the end part of the one two-folded sheet is wrapped with the approximately intermediate part of the other two-folded sheet.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is directed to a zigzag sheet that is folded into four in a direction perpendicular to the direction in which these sheet materials are transported, from left and right pairs of strip-shaped sheet materials such as paper or nonwoven fabric that are continuously transported from a raw material. This invention relates to a four-fold zigzag folding device that can continuously produce folded sheets.

0002

2. Description of the Related Art A rotary zigzag folding drum is known that can alternately fold sheet materials such as paper in a zigzag pattern so that they can be picked up one by one. This zigzag folding drum is capable of continuously producing sheets in a zigzag folded form in which the fed sheet material is alternately folded in half in a direction perpendicular to the flow direction of the sheet.

[0003] Zigzag folded products, typified by box tissues and kitchen paper, have a folding area when folded and a piece of paper that is picked out one by one from the container in which the sheets are folded in a zigzag pattern. The protrusion length was just right for the two-fold form. However, over the past few years, products with larger sheet areas than conventional sheet products, such as disposable nursing care towel paper for hospitals, have appeared. If the zigzag folded form is used, the folding area may be too large, or when picking out the zigzag-folded sheets one by one from the container in which they are stored, the picked pieces, that is, the sheets folded in half, may be removed. One piece was longer than the container and hung down, making it both unsanitary and unsightly.

0004

[Problems to be Solved by the Invention] The present invention is to produce a zigzag-folded product which is obtained by folding a left and right pair of belt-shaped sheet materials that are continuously transported into four in a direction perpendicular to the flow direction of these sheet materials. Enable continuous production4
The purpose is to provide a folding zigzag folding device, so that even sheet products with a wide sheet surface can be
The folding surface can be made compact, and the protruding length of the picked pieces when picking out sheets folded in a zigzag shape one by one from the container in which they are stored can be made to be just the right and convenient length. It is intended to do so.

[0005]

[Means for Solving the Problems] In order to achieve the above object, in the four-fold zigzag folding device of the present invention, there are The conveyed belt-shaped sheet material is pushed into the gripping part of the holding drum, and by pushing the pressing part of the drum, it is folded in half through the first fold in the direction perpendicular to the conveying direction, and A pair of left and right folding drums each having a cutting blade on one side and a receiving blade that cooperates with the cutting blade to cut the first fold of the folded in half into a predetermined dimension perpendicular to the transport direction; The two-fold sheet, which has been folded in half and cut to a predetermined size by these folding drums, is released from the gripping portion of each gripping drum and transferred to a belt conveyor located directly below the gripping drum. a feed guide device that feeds the sheet to a transfer start end position, and a two-folded sheet fed from each folding drum by the feed guide device to the transfer start end position located in the left-right direction from the transfer start end position. The bi-folded sheets transferred from the left and right directions are transferred to the opposite transfer terminal position, and each end of one bi-folded sheet is positioned in the middle of the other bi-folded sheet. A pair of left and right belt conveyors are arranged so that the sheet surfaces can be shifted and overlapped with each other, and a belt conveyor is arranged directly below the transfer end position of this belt conveyor, and from this transfer end position, the above-mentioned overlapping state The two folded sheets that are continuously fed in are
A pair of drums provided with alternating gripping parts and pushing parts that alternately fold the folded sheet in a zigzag manner through the second fold so that the end of the folded sheet is contained in approximately the middle of the other two-folded sheet that overlaps. It consists of a zigzag folding drum.

[0006] Then, on each belt surface of the left and right pair of belt conveyors, into which the bifold sheets are sent from the folding drums, and at the transfer end position of the belt conveyors, where the bifold sheets begin to be superimposed on each other. A suction device is provided that can suck the two-folded sheet being transported.

[0007]

[Operation] As mentioned above, the pair of left and right belt-shaped sheet materials that are continuously transferred from the original fabric are first fed into the folding drums provided corresponding to the respective belt-shaped sheet materials. It is folded in half by the drum in a direction perpendicular to the transport direction, and cut into a predetermined size perpendicular to the transport direction around the folded portion. The two-folded sheet, which has been folded in half and cut into a predetermined size by the folding drum, is held in the gripping portion of the gripping drum by a feeding guide device, and transferred to a belt conveyor disposed directly below the gripping drum. is continuously fed to the transfer starting end position. When the sheets folded in half by the folding drum are continuously fed to the transfer starting end position of the belt conveyor, the above-mentioned feeding guide device works and the fed bifold sheets are sucked to the predetermined transfer starting end position of the belt conveyor. By working with the suction device, the two-folded sheet is accurately fed to a predetermined transfer start position of the belt conveyor. Then, the two-folded sheet sent to the transfer start end position of the belt conveyor is transferred from this transfer start end position located in the left-right direction to the opposite transfer end position, and then At the position, the two-folded sheets transported from the left and right directions are stacked with each sheet side shifted so that each end of one of the two-folded sheets is located in the middle of the other two-folded sheet, and in this superposed state, the belt conveyor It is sent to the next zigzag folding drum located directly below the transfer end position of the drum. When bifold sheets are continuously fed from the transfer end position of the belt conveyor to the next zigzag folding drum in a predetermined overlapping state, the transfer end of the belt conveyor where the bifold sheets begin to be overlapped with a predetermined deviation from each other. A suction device is installed at the position of the belt that can suck the two-folded sheet transferred to the belt surface at that position.
The folded sheets are accurately overlapped with a predetermined offset and are accurately fed into the zigzag folding drum. The two-folded sheet fed into the zigzag folding drum is then folded into a zigzag folding drum by a gripping drum and a pushing drum, each of which has alternating gripping parts and pushing parts. The sheets are alternately folded in a zigzag shape so as to be included in approximately the middle portion of the sheets, thereby continuously manufacturing a zigzag-folded sheet product that is folded into four in a direction perpendicular to the sheet transport direction.

[0008]

[Embodiment] FIG. 1 is a front view showing one embodiment of the apparatus of the present invention. It is fed into a pair of left and right folding drums 2, 2 arranged correspondingly to each other. The folding drums 2, 2 are composed of a gripping drum 3 and a pushing drum 4, which are rotated in opposite directions to each other in the direction of the arrow. There are two gripping parts 5, 5 at positions 180 degrees apart on the circumference of the gripping drum 3 disposed below.
1 on the circumference of the pushing drum 4 arranged above.
Two push-in portions 6, 6 are provided at positions 80 degrees apart, and the grip portions 5, 5 and push-in portions 6, 6 press the grip portion 5 of the grip drum 3 while the respective drums are rotated. The pushing part 6 of the pushing drum 4 is pushed in. Further, on the circumference of the gripping drum 3, the gripping portions 5, 5 to 9 are provided.
Two receiving blades 7, 7 are provided at positions 0 degrees apart, and two cutting blades 8, 8 are provided on the circumference of the pushing drum 4 at positions 90 degrees apart from the pushing parts 6, 6. The receiving blade 7 of the gripping drum 3 and the cutting blade 8 of the pushing drum 4 are formed so as to coincide with each other while the drums are rotated. As a result, the left and right pair of belt-shaped sheet materials 1, 1 that are continuously transferred from the original fabric are folded to the folding drum 2, respectively.
2, it is pushed into the gripping portion 5 of the gripping drum 3 by the pressing portion 6 of the pressing drum 4, and is folded in two along the first fold 10 in the direction perpendicular to the transport direction. When it is further rotated with the fold 10 held in its mouth, the receiving blade 7 provided at an intermediate position between each of the gripping parts 5, 5 and the cutting blade 8 provided at an intermediate position between the pushing parts 6, 6 are aligned.
The two-folded sheet 11 is cut into a predetermined size orthogonal to the transport direction around the first fold 10 by working together, and is correctly folded in half through the first fold 10 in the direction perpendicular to the transport direction. are formed continuously.

The first fold 10 of the sheet folded in half and cut into a predetermined size by each of the folding drums 2, 2, that is, the folded sheet 11, is held in the gripping portion 5, while the first fold 10 is placed under the gripping drum 3. When the gripping drums 3, 3 are rotated, the feeding guide device 12 attached to each gripping drum 3,
12, the gripping drum 3 is separated from the gripping drum 3.
It is sent to the transfer starting end position of a belt conveyor, which will be described later, which is disposed directly below the belt conveyor. This feeding guide device 12 is made up of a feeding guide rod 13 having a curved shape along the lower surface of the gripping drum 3, and the feeding guide rod 13 is arranged at a predetermined location including the portion where the gripping portion 5 of the gripping drum 3 is positioned. A retracted position that is located within a plurality of guide grooves 14 formed along the circumferential direction of the drum outer circumferential surface over a range and does not protrude from the lower circumferential surface of the gripping drum 3; and an advanced position that protrudes from within the guide groove 14. It is configured to move up and down between the two. and,
This feeding guide rod 13 is the first of two folded sheets 11.
When the fold 10 is rotationally moved downwards in the gripping drum 3 while being held in the gripping portion 5, it rises from the lowered position outside the guide groove 14, enters the guide groove 14, and descends again to move this guide. When moving out of the groove 14, the two-folded sheet 11 held in the holding part 5 is released downward from the holding drum 3, and is transferred to a belt conveyor (to be described later) disposed directly below the holding drum 3. It is arranged to send the paper to the transfer starting end position. In addition to the illustrated feed guide rod 13, this feed guide device may be operated by air that is injected toward the transfer start end position of the belt conveyor.

The belt conveyors 15, 15 are arranged in pairs on the left and right, corresponding to the respective folding drums 2, 2, and are conveyed from the respective folding drums 2, 2 to the left and right by feeding guide devices 12, 12. The two-folded sheets 11 are sequentially fed to the transfer start end position located in the direction
with the first fold 10 at the top, from the transfer start end position to the opposed transfer end position, and at the opposed transfer end position, the two-folded sheets are transferred from the left and right directions. The sheet surfaces of No. 11 and No. 11 are constructed so as to be superimposed. Specifically, the left and right pair of belt conveyors 15, 15 each have a starting end roller 16.
and a transfer belt 18 wound around a terminal end roller 17, and as described above, the transfer start end of each belt conveyor 15, 15 is positioned directly below each gripping drum 3, 3 of a pair of left and right folding drums 2, 2. The two-fold sheet 11 transported from the left and right directions can be held between the belt-contacting surfaces at the opposed transport end positions. Then, the length of the two-folded sheet 11 fed from each folding drum 2, 2 in the flow direction becomes half the initial sheet length, and the belt conveyor 15,
15, and in order to synchronize the running speed of the belt conveyor 15 with this feeding speed, the running speed of these belt conveyors 15, 15 is set to half the circumferential speed of each folding drum 2, 2. Ru. In this way, the two-folded sheets 11 that are continuously transported from the left and right with the first fold 10 at the beginning are transported at each end of one of the two-folded sheets 11 at the transport end position of each belt conveyor 15, 15. The two folded sheets 11 are overlapped with each other by shifting their surfaces so that the two folded sheets 11 are positioned in the middle of the other two folded sheets 11. is provided so that the two-folded sheet 11 is fed onto the belt conveyors 15, 15. Therefore, from these folding drums 2, 2, each belt conveyor 15, 15
When the two folded sheets 11, 11 are fed to each transport end position and overlapped at the opposite transport end positions of each belt conveyor, one of the two folded sheets 11, 11
Each end of the folded sheet 11 is connected to the other folded sheet 11.
Each sheet surface is shifted so that it is positioned in the middle of the sheet. As a result, the two-folded sheet sent to the transfer start end position of each belt conveyor 15, 15 is moved from the transfer start end position located in the left-right direction to the transfer end position located oppositely so that it can be overlapped. The two folded sheets 11 are stacked at opposite positions of the belt conveyors 15, 15 with their respective sheet surfaces shifted such that each end of one half folded sheet 11 is positioned in the middle of the other half folded sheet 11. In a superposed state, the materials are sent to the next zigzag folding drum located directly below the transfer end position of the belt conveyor.

Belt conveyor 15,1 into which the two-folded sheet 11 is sent from the folding drums 2,2.
A suction device capable of suctioning the two-folded sheets onto the conveying surfaces of these belts is provided at the conveyance start end position of the conveyor belt 5 and at the conveyance end position of the belt conveyors 15, 15 where the two-folded sheets 11 begin to be superimposed on each other. The suction device disposed at the transfer start end position includes suction rollers 19, 19 that are rotated in the same direction as the start end roller 16 and the end end roller 17 and in synchronization with the running speed of the belt 18. The suction rollers 19, 19 are connected to the belt 1 at the transfer starting end position.
As shown in FIG. 2, the suction holes 20 of the suction rollers 19 are arranged in the gaps between the belts 18. Also,
In the suction device disposed at the transfer end position, the end roller 17 is configured as a suction roller. This end roller 17, that is, the suction roller, also has suction holes 21 arranged in the gaps between the belts 18, as shown in FIG. Note that this suction roller 17 applies a suction force as shown by the arrow in FIG. Air is ejected in the direction of the belt surface as shown by the arrow in FIG. 3, and functions to separate the two-folded sheet 11 from the transport belt surface. In this way, the two-folded sheet 11 to be transported is attracted to the surface of the belt traveling at these positions by the suction holes 20, 21 arranged in the gaps between the transport belts 18. As a result, folding drum 2
, 2, when the sheets folded in half are continuously fed to the transfer start end position of the belt conveyor 15, the feeding guide device 12 works and the fed bifold sheets 1
The two-folded sheet 11 is accurately sent to a predetermined transfer start position of the belt conveyor 15 by the action of a suction device capable of suctioning the folded sheet 11 to a predetermined transfer start position of the belt conveyor 15. Furthermore, when the two-folded sheets 11 are continuously fed from the transfer end position of the belt conveyor 15 to the next zigzag folding drum in a predetermined overlapping state, the two-folded sheets 11 are overlapped with each other with a predetermined deviation. A suction device capable of suctioning the two-folded sheet onto the belt surface at that position is installed at the transfer end position opposite to the belt conveyor where the sheet begins to be conveyed. They are precisely stacked and fed into the zigzag folding drum. Incidentally, reference numerals 22 and 22 in FIG. 1 indicate the suction roller 19 and the end roller (suction roller) 1.
7, and the suction holes of this suction box 22 are also located in the gaps between the plurality of transfer belts 18.

[0012] In this way, the bifold sheet 11 is
It is sent to a zigzag folding drum 23 consisting of a pair of left and right drums 24, 24 which are disposed directly below the opposed transfer end positions of the respective belt conveyors 15, 15 and rotate in opposite directions in the directions of the arrows. This zigzag folding drum 23 is conventionally known, and gripping parts 25, 25 and pushing parts 26, 26 are arranged alternately at 90 degree intervals on the circumference of each drum 24, 24. The gripping portions 25, 25 and the pushing portions 26, 26 are brought into alignment alternately while the respective drums 24, 24 are rotated. In this way, the two-folded sheet 11 sent to the zigzag folding drum 23 is moved to one side by a pair of left and right drums 24, 24 which are provided with alternately gripping parts 25 and pushing parts 26, as shown in FIG. The two folded sheets 11 are alternately folded in a zigzag manner through the second folds 27 so that the ends of the two folded sheets 11 are contained in approximately the middle part of the other two folded sheet 11 that overlaps with each other. The first fold 10 is made in the direction perpendicular to the direction of transport.
A sheet product in a zigzag folded form that is folded into four through the second fold line 27 is continuously produced.

FIG. 4 is a front view showing another embodiment of the apparatus of the present invention. In this embodiment, a pair of left and right folding drums are provided, two on each side. These folding drums 2, 2, 2, 2 are similar to those in FIG.
The belt-shaped sheet materials 1, 1, 1, 1 fed into the folding drum are folded in half along the first fold 10 and cut into a predetermined length, and the sheets shown in FIG. Similar infeed guide device (feed guide rod)
12, 12, 12, 12 each folding drum 2,
Belt conveyor 15, 1 arranged directly under 2, 2, 2
5 to the transfer starting end position. Suction rollers 19, 19, 1 similar to those shown in FIG.
9 and 19 are respectively arranged. The running speed of the belt conveyors 15, 15 is determined by the speed of each folding drum 2.
, 2, 2, 2 is set to the same peripheral speed. As mentioned above, the traveling speed of the belt conveyors 15, 15 in FIG. Therefore, the circumferential speed of the folding drums 2, 2 is set to half, but in this embodiment, two folding drums are installed on the left and right sides, and the paper is fed onto the belt from these folding drums. The feeding speed of the two-folded sheet 11 is doubled. As a result, the device shown in FIG.
This enables production to be twice as fast as previous equipment.

[0014] The apparatus of the present invention continuously produces sheet products in the form of four-fold zigzag folds with the first fold 10 and the second fold 27 interposed in a direction perpendicular to the sheet transport direction. However, if you want to further reduce the folding area of the sheet, for example, folding drums 2, 2
A bending regulation plate is provided that can fold the belt-shaped sheet materials 1, 1 in two along the transport direction to be transported to the previous process, and the belt-shaped sheet materials are pre-folded in two along the transport direction with this bending regulation plate. Alternatively, the paper may be fed from the folding drums 2 to the folding drums 2, 2.

[0015]

Effects of the Invention Since the present invention is constructed as described above, it is possible to fold the first fold in the direction perpendicular to the flow direction of these sheet materials from the left and right pair of belt-shaped sheet materials that are continuously transported. It is possible to continuously manufacture products in a zigzag folded form that is folded in four through the first and second folds. Therefore, even if the sheet product has a wide sheet surface, the folding surface can be made compact and it can be easily accommodated. The protruding length of the picked pieces when picking out the sheets folded in a zigzag shape one by one from the container in which they are stored can also be set to an appropriate and convenient length.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing a four-fold zigzag folding device of the present invention.

FIG. 2 is a plan view showing the belt conveyor of FIG. 1;

FIG. 3 is an enlarged front view showing the end portion and zigzag folding drum of the belt conveyor in FIG. 1;

FIG. 4 is a front view schematically showing another example of the four-fold zigzag folding device of the present invention.

FIG. 5 is a front view showing a four-fold zigzag folded sheet product manufactured by the apparatus of the present invention.

[Explanation of symbols]

1 Band-shaped sheet material 2 Folding drum 3. Mouth drum 4 Push drum 5. Mouth part 6 Push part 7. Receiving blade 8 Cutting blade 10 1st fold 11 Bifold sheet 12 Feeding guide device 15 Belt conveyor 17 Suction device (suction roller) 19 Suction device (suction roller) 20 Suction hole 21 Suction hole 23 Zigzag folding drum 25 Mouth part 26 Push part 27 2nd fold

Claims (2)

[Claims] Claim 1: A device is provided corresponding to a left and right pair of belt-shaped sheet materials that are continuously transferred from the original fabric, and is configured to hold the transported belt-shaped sheet materials in its mouth and push them into the gripping portion of the drum. By pushing, the first fold is folded into two in a direction perpendicular to the transport direction, and a cutting blade is attached to one side of each drum, and the first fold which is folded in two is folded in cooperation with the cutting blade to the other side. A left and right pair of folding drums are provided with receiving blades at the center that cut into a predetermined size perpendicular to the transport direction, and each holding drum holds a bifold sheet that has been folded in half and cut into a predetermined size by these folding drums. A feed-in guide device removes the holding drum from the gripping portion and sends it to the transfer starting end position of a belt conveyor located directly below the gripping drum, and the feed-in guide device moves the folding drum from each folding drum in the left and right direction. transporting the two-folded sheet fed to the transfer start end position located at the transfer start end position from the transfer start end position to the opposite transfer end position;
At these opposed transfer end positions, the bifold sheets transferred from the left and right directions are shifted so that each end of one bifold sheet is positioned in the middle of the other bifold sheet. A pair of left and right belt conveyors are arranged so that they can be overlapped, and a pair of left and right belt conveyors are arranged directly below the transfer end position of this belt conveyor, and the two-folded sheets are continuously fed from the transfer end position in the overlapping state. The holding part and the pushing part are used to alternately fold the sheet in a zigzag manner through the second fold so that the end of one folded sheet is contained in the substantially middle part of the other folded sheet which overlaps. A four-fold zigzag folding device characterized by comprising a zigzag folding drum consisting of a pair of drums provided. 2. At each belt surface of each conveyance start end position of the left and right pair of belt conveyors, into which the bifold sheets are sent from each of the folding drums, and at the conveyance end position of the belt conveyor, where the bifold sheets begin to be superimposed on each other. The four-fold zigzag folding apparatus according to claim 1, further comprising a suction device capable of sucking the two-folded sheets being transported.