JP3017219B1 - Web zigzag folding device - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To cut even a web of a material such as non-woven fabric, thick paper, slippery paper, etc., which could not be processed in the past, with a sharp cut surface, to reduce loss of grip of the cut piece, and to achieve accurate Zig-zag folding can be performed at a proper folding position. SOLUTION: A cutting unit 1 including a mold roll 10, a transfer roll 20, and a blade roll 30 is provided. The mold roll 10 rotates in synchronization with the folding roll 40, and has mold grooves 11 and bar-like projections 12 alternately on the roll peripheral surface. The transfer roll 20 rotates in synchronization with the mold roll 10 and the folding roll 40, and has a mold projection 22, which overlaps with the mold groove 11 and molds the web W, and a cutter 21, which are alternately provided on the roll peripheral surface. ing. The blade roll 30 rotates in synchronization with the transfer roll 20, and has a blade 31 on the roll peripheral surface that cuts the web W by shearing with the cutter 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relatively thin paper such as tissue paper and towel paper, as well as thick paper such as nonwoven fabric and kitchen paper, and slippery paper such as oil-absorbing paper and decorative paper. Even if it is a web as a material, it is cut in the width direction while continuously supplying a continuous web, and the two cut pieces are alternately zigzag-folded continuously without separating the cut pieces. The present invention relates to a web zigzag folder for stacking and manufacturing stacks.

[0002]

2. Description of the Related Art As a conventional web zigzag folding apparatus, there is an apparatus described in Japanese Patent No. 2796078.
FIG. 8 is a front view of a conventional web zigzag folding apparatus. In the figure, reference symbol W indicates a continuous web such as tissue paper or towel paper.

A pair of left and right mold rolls 120, 120 and a pair of left and right mold rolls 130, 130 are rotatably provided. A pair of left and right folding rolls 140, 140 are rotatably provided between the mold rolls 130, 130. Movable jaws 141 and cutter anvils 142 are alternately provided on the roll peripheral surface of each folding roll 140 along the rotation direction. Above each folding roll 140,
Each of the cutter blades 102 is fixed. The cutter blade 102 shears the cutter anvil 142 of the folding roll 140 to cut the web W. Reference numeral 50 indicates a folding bar. The pair of left and right folding bars 50, 50 are for zigzag folding the cut pieces of the two pieces together.

[0004] When a continuous web W is supplied, the web W is formed by the projections 121 of the molding roll 120 and the grooves 13 of the molding roll 130.
2 and the cutting mold is formed. Then, the rod-shaped projection 131 of the molding roll 130 and the groove 122 of the other molding roll 120 are formed.
With this, the web W is folded. Therefore, the cutting die and the folding die are formed alternately at equal intervals on the web W.

[0005] As shown in FIG. 9, a continuous web W is continuously fed to a folding roll 140, and a convex portion of a cutter anvil 142 of the folding roll 140 has
The cutting die of the web W is locked. The web W is a cutter anvil with a cutter blade 102 and a folding roll 140.
142, the cut pieces P having the same length can be continuously manufactured.

[0006] As shown in FIG. 10, the folding type of the cut piece P is engaged with the concave portion of the movable jaw 141 of the folding roll 140. The cut piece P is gripped by the movable jaw 141 of the folding roll 140. Next, the foldable roll 140 moves downward while being adsorbed and held on the surface of the folding roll 140, and is peeled off from the surface of the folding roll 140 by one of the right and left folding bars 50 on the way, and at the same time, is moved upward by the folding bar 50. Folded from the stack, the folded stack T
Becomes

[0007] In this manner, a pair of left and right webs W, 1, which are unreeled from a pair of web rolls (not shown) by the conventional web zigzag folding device, respectively.
The W is cut into a cut piece P, and the two cut pieces P are zigzag-folded continuously to produce an aggregate T.

[0008]

However, in the conventional web zigzag folding apparatus, the cutter blade 102 is not used.
Is fixed, the resistance generated between the cutter blade 102 and the cutter anvil 142 is large when the material of the web W is a thick paper such as a nonwoven fabric or kitchen paper. For this reason, there is a problem that the life of the blade of the cutter blade 102 is shortened and the web W may not be cut at a sharp cut surface. Further, in the conventional web zigzag folding apparatus, as shown in FIG. 10 again, the cut piece P on the roll peripheral surface of one folding roll 140 is moved by the movable jaw of the other folding roll 140.
When it is gripped by 141 and peeled off from the roll peripheral surface, frictional resistance occurs between the cut piece P and the cutter anvil 142. The smaller the frictional resistance, the easier it is to peel off the cut piece P from the roll peripheral surface of the folding roll 140. However, the cutter anvil 142 has an important function of cutting the web W by shearing with the cutter blade 102. For this reason, the cutter anvil 142 of the folding roll 140 can use only hard steel. The material of the cutter anvil 142 cannot be made slippery. Therefore, the material of the web W that can be processed is limited to non-slip paper, and when processing the web W of a material that cannot be processed,
There is a problem that the movable jaw 141 may fail to grasp the cut piece P, which causes a loss of the product.

In view of such circumstances, the present invention can cut a web of a material such as a nonwoven fabric, a thick paper, or a slippery paper which could not be processed with a sharp cut surface,
The gripping loss of the cut pieces can be reduced, zigzag folding can be performed at the correct folding position, the product shape can be improved, product loss can be reduced, high yield can be maintained even in mass production, and blades can be maintained. It is an object of the present invention to provide a web zigzag folding device capable of extending the life of a blade.

[0010]

According to a first aspect of the present invention, there is provided a web zigzag folding apparatus in which a continuous web fed from a pair of left and right web rolls is continuously cut into a pair of left and right cuts. A unit, a pair of left and right folding rolls for continuously and alternately stacking the cut left and right cut pieces alternately by two sheets, and a pair of right and left folding bars for zigzag folding the two pieces of cut pieces continuously. A folding device comprising:
The cutting unit is provided rotatably in synchronization with the folding roll, and a mold groove extending in the axial direction of the roll and a rod-shaped protrusion extending in the axial direction of the roll are alternately rolled along the rotating direction. A mold roll provided on the peripheral surface,
A mold projection, which is rotatably provided in synchronization with the mold roll and the folding roll, overlaps the mold groove and can mold the web, and a cutter extending in the axial direction of the roll, A transfer roll provided on the roll peripheral surface alternately along the transfer roll, and a blade that is provided rotatably in synchronization with the transfer roll and that can cut the web by shearing with the cutter along the rotation direction. And a blade roll provided on the roll peripheral surface with an interval. In the web zigzag folding device according to claim 2, in the invention according to claim 1, a suction hole for sucking the cut piece is provided on the roll peripheral surface of the transfer roll near the die-shaped projection. A suction hole for sucking the cut piece is provided in the vicinity of the cutter; and on the roll peripheral surface of the transfer roll, the cut piece is sucked in the vicinity of the die-shaped protrusion. And a suction hole for sucking the cut pieces is provided near the cutter. According to a third aspect of the present invention, in the web zigzag folding apparatus according to the first or second aspect, the folding roll is provided with a movable jaw and a tucker alternately on a roll peripheral surface along a rotational direction, and the tucker is provided. The material is characterized in that a frictional resistance generated between the tucker and the cut piece is selected to be smaller than a frictional resistance generated between the cut pieces.

According to the first aspect of the present invention, the continuous web fed out of the web roll is sandwiched between the die groove of the die roll and the die projection of the transfer roll, so that the web runs along the running direction. Are evenly spaced. The shaped web is fed between a transfer roll and a blade roll and cut by shear forces created between the transfer roll cutter and the blade of the blade roll. Since the transfer roll and the blade roll rotate in synchronization with each other, the resistance generated between the cutter and the blade is small. For this reason,
The web is cut with a sharp cut surface with little resistance. Further, the cut pieces are directly sent from the transfer roll to the folding roll. For this reason, the cut piece is sent to the folding roll without displacement, and is continuously zigzag folded by the folding bar. Furthermore, since the cut pieces already cut by the cutting unit are sent to the folding roll, there is no need to provide a cutter on the roll peripheral surface of the folding roll. For this reason, on the roll peripheral surface of the folding roll, a tucker of a slippery material for facilitating peeling of the cut piece from the roll peripheral surface can be provided instead of the cutter. According to the second aspect of the present invention, both the cut portion on both sides and the intermediate portion of the cut piece are adsorbed on the roll peripheral surface of the transfer roll by the suction holes, so that misalignment can be prevented. According to the invention of claim 3, since the frictional resistance generated between the tucker and the cut piece is smaller than the frictional resistance generated between the cut pieces, the movable jaw of one of the folding rolls allows the other folding roll to move. The upper cut piece is easily peeled off from the roll peripheral surface.

In the present invention, the "cutter" and the "tucker" are different members, the "cutter" is a member for cutting a web, and the "tucker" is a member for folding a cut piece.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a web zigzag folding apparatus according to the present embodiment. As shown in the figure, the web zigzag folding apparatus of the present embodiment includes a pair of left and right cutting units 1 and 1 and a pair of right and left folding rolls 4.
0, 40 and a pair of left and right folding bars 50,
50. Each of the pair of left and right folding rolls 40, 40 is rotatably provided, and will be described in detail later. In the figure, the symbol W indicates a continuous web. The material of the web W may be not only relatively thin paper such as tissue paper or towel paper, but also nonwoven fabric, thick paper, or slippery paper. The reason will be described later.

First, the cut unit 1 will be described. FIG.
3 is an enlarged view of the cutting unit 1. FIG. As shown in FIGS. 1 and 2, the cutting unit 1 is composed of a mold roll 10, a transfer roll 20 and a blade roll 30, and continuously cuts a continuous web W, which is not shown. This is a cut piece P.

Next, the forming roll 1 of the cutting unit 1
0 will be explained. FIG. 3 is an operation explanatory view of the mold roll 10 and the transfer roll 20. As shown in FIGS. 2 and 3, the mold roll 10 is provided rotatably in synchronization with the folding roll 40. On the peripheral surface of the mold roll 10, mold grooves 11 and bar-like projections 12 are provided alternately along the rotation direction. The groove 11 is a V-shaped groove extending in the axial direction of the folding roll 40. The bar-shaped protrusion 12 is a bar-shaped protrusion extending in the axial direction of the folding roll 40 and is made of iron.

Next, the transfer roll 20 of the cutting unit 1 will be described. Transfer roll 20
Is rotatably provided in synchronization with the mold roll 10 and the folding roll 40. On the peripheral surface of the transfer roll 20, a projection 21 with a mold and a cutter 22 are provided.
Are provided alternately along the rotation direction. The mold projection 21 is a rod-like projection extending in the roll axis direction of the transfer roll 20.
1, the web W can be modeled. Cutter 2
Reference numeral 2 denotes a blade having a shape extending in the roll axis direction of the transfer roll 20, and is made of high-speed tool steel.

Next, the blade roll 30 of the cutting unit 1 will be described. FIG. 4 is an explanatory diagram of the operation of the transfer roll 20 and the blade roll 30. As shown in the figure, the blade roll 30 is provided rotatably in synchronization with the transfer roll 20. Blades 31 are provided on the roll peripheral surface of the blade roll 30 at intervals along the rotation direction. The blade 31 is made of high-speed tool steel and has a blade roll 30.
The roller is not parallel to the axial direction of the roll but is slightly displaced in the rotation direction and is provided obliquely on the circumferential surface of the roll. The blade 31 shears the cutter 22 of the transfer roll 20 to cut the web W.

Next, the folding roll 40 will be described.
FIG. 5 and FIG.
2 is an enlarged view of a folding roll 40. FIG. As shown in FIGS. 5 and 6, movable jaws 41 and tuckers 42 are alternately provided on the peripheral surface of the folding roll 40 along the rotation direction. The tucker 42 of one folding roll 40 is arranged out of phase so as to match the movable jaw 41 of the other folding roll 40. Although not shown, the movable jaw 41 is connected to a cam and a spring, and operates as follows.
Each movable jaw 41 is open except for the vicinity of the contact portion of the folding roll 40, and is on standby to hold the cut piece P of the web W. In the vicinity of the contact portion of the folding roll 40, the movable jaw 41 is closed, and can hold the left and right webs W, the cut pieces P of the W. Code 41h
, 42h denote suction holes, which are connected to a vacuum device (not shown). The negative pressure of the vacuum device causes the cut pieces P to be attracted to the roll peripheral surface of the folding roll 40.

Since the cut pieces P already cut by the cutting unit 1 are sent to the folding roll 40, there is no need to provide a cutter on the roll peripheral surface of the folding roll 40. For this reason, on the roll peripheral surface of the folding roll 40, a tucker 42 made of a slippery material for facilitating peeling of the cut pieces P from the roll peripheral surface can be provided instead of the cutter.

The tucker 42 is not a cutter but a rod-shaped projection extending in the roll axis direction of the folding roll 40. Since the tucker 42 is not a cutter, its material does not have to be carbide steel. The material of the tucker 42 is obtained by coating the surface of iron with Teflon. For this reason,
The frictional resistance generated between the tucker 42 and the cut piece P is smaller than the frictional resistance generated between the cut piece P and the cut piece P. For this reason, even if the material of the cut piece P is slippery paper such as oil-absorbing paper or decorative paper, the movable jaw 41 can reliably grip the cut piece P. Therefore, there is an effect that zigzag folding can be performed at an accurate position.

FIG. 7 is an enlarged view of the pair of folding rolls 40, 40. As shown in the figure, a cut portion of the cut piece P is hooked on a convex portion of the tucker 42, and an intermediate portion of the cut piece P is hooked on a concave portion of the movable jaw 41. That is, the molded cut piece P is accurately positioned without being shifted from a predetermined position on the peripheral surface of the folding roll 40, and the movable jaw 41 near the contact portion of the folding roll 40 on the left side in the figure is moved to the right cut piece P The left cut piece P is grasped and closed together with the cut portion. Similarly, the movable jaw 41 in the vicinity of the contact portion of the folding roll 40 on the right side in the drawing grasps the middle portion of the right cut piece P together with the cut portion of the left cut piece P and is closed. Therefore,
When the folding roll 40 rolls, the cut pieces P are alternately shifted so that the cut edge of the other cut piece P comes alternately in the middle of one cut piece P, and the cut jaws 41 are moved by the movable jaws 41 of the folding roll 40. The center of the cut piece P and the cut edge of the cut piece P are both gripped. Further, since the cutting edge of the cut piece P is always a portion molded at the same depth, a length sufficient for the movable jaw 41 to be gripped can be always secured, and the effect of reducing the detachment of the movable jaw 41 from being gripped is reduced. Play.

Next, the folding bar 50 will be described. A pair of left and right folding bars 50, 50 are provided. The folding bar 50 is a known one. The folding bar 50 is for zigzag folding the cut pieces of the two pieces together in a continuous manner.

Next, the operation and effect of the web zigzag folding apparatus of the present embodiment will be described. A pair of left and right webs W, W is fed from a pair of left and right web rolls (not shown). Each web W is sent between a molding roll 10 and a transfer roll 20. As shown in FIG. 3A, the web W is molded by being sandwiched between the molding groove 11 of the molding roll 10 and the molding projection 21 of the transfer roll 20. Moreover, since the molding roll 10 and the transfer roll 20 are rotating in synchronization with each other, the web W can be continuously molded. Therefore, the web W is molded at equal intervals in the traveling direction.

Since the web W is adsorbed on the roll peripheral surface of the transfer roll 20 by the suction holes 21h and the suction holes 22h of the transfer roll 20, it is possible to prevent the displacement.

Next, the web W is sent between the transfer roll 20 and the blade roll 30. FIG.
As shown in (A), the web W is made up of the cutter 22 of the transfer roll 20 and the blade 3 of the blade roll 30.
The web W is cut by a shear force generated between the web W and the web W. Since the transfer roll 20 and the blade roll 30 rotate in synchronization with each other, the resistance generated between the rod-shaped projection 22 and the blade 31 is small. For this reason, the web W has almost no resistance and has a sharp cut surface without being jagged,
It is cut into a cut piece P. Therefore, even if the material of the web W is a thick paper such as a nonwoven fabric or kitchen paper which could not be processed conventionally, there is an effect that the web W can be cut with a sharp cut surface.

Next, the cut pieces P are sent between the transfer roll 20 and the folding roll 40. As shown in FIG. 5, the cut portions on both sides of the cut piece P are adsorbed on the roll peripheral surface of the folding roll 40 by the suction force of the suction holes 42h, 42h of the folding roll 40. In addition, as shown in FIG.
The suction hole 41h is adsorbed on the roll peripheral surface of the folding roll 40. The cut piece P is formed by folding the roll 4 at the cut portions on both sides and the intermediate portion thereof by suction holes 42h and 41h.
Since the sheet P is adsorbed on the peripheral surface of the roll 0, the position of the cut piece P can be prevented from shifting.

Since the cut pieces P on the roll peripheral surface of the transfer roll 20 are directly sent to the roll peripheral surface of the folding roll 40, there is an effect that positional deviation can be prevented.

Next, the cut piece P is sent between a pair of left and right folding rolls 40,40. Since the frictional resistance generated between the tucker 42 and the cut piece P becomes smaller than the frictional resistance generated between the cut pieces P, P, the movable jaw 41 of one of the folding rolls 40 causes the movable jaw 41 on the other folding roll 40 to rotate. Cut piece P from the roll peripheral surface is easily peeled off. Therefore, even if the material of the web W is slippery paper such as oil-absorbing paper or decorative paper that could not be processed conventionally, the cut piece P on the other folding roll 40 is moved by the movable jaw 41 of the one folding roll 40. Can be reliably peeled off from the peripheral surface of the roll. Thus, the left and right cut pieces P, P
Are successively and alternately superimposed on each other.

Finally, the two cut pieces P, P are zigzag-folded continuously by the pair of left and right folding bars 50, 50 to produce the aggregate T.

[0030]

According to the web zigzag folding device of the first aspect, even a web of a nonwoven fabric or a thick paper material that could not be processed conventionally can be cut with a sharp cut surface, and the cut piece can be cut. Can reduce the loss of gripping,
Zigzag folding can be performed at an accurate folding position, the shape of the product can be improved, product loss can be reduced, a high yield can be maintained even when mass production is performed, and the life of the blade can be extended. According to the web zigzag folding device of the second aspect, both the cut portion on both sides and the intermediate portion of the cut piece are adsorbed on the roll peripheral surface of the transfer roll by the suction holes, so that misalignment can be prevented. . According to the web zigzag folding device of the third aspect, the frictional resistance generated between the tucker and the cut pieces becomes smaller than the frictional resistance generated between the cut pieces, so that the slippery paper which cannot be processed conventionally can be used. Even with a cut piece of a material, the cut piece on the other folding roll can be easily peeled off from the roll peripheral surface by the movable jaw of one folding roll.

[Brief description of the drawings]

FIG. 1 is a front view of a web zigzag folding apparatus according to an embodiment.

FIG. 2 is an enlarged view of the cutting unit 1. FIG.

FIG. 3 shows a mold roll 10 and a transfer roll 2
0 is an operation explanatory diagram of FIG.

FIG. 4 is an explanatory diagram of an operation of a transfer roll 20 and a blade roll 30.

FIG. 5 is an enlarged view of a transfer roll 20 and a folding roll 40.

FIG. 6 is a diagram illustrating the operation of the transfer roll 20 and the folding roll 40.

FIG. 7 is an enlarged view of a pair of folding rolls 40, 40.

FIG. 8 is a front view of a conventional web zigzag folding device.

FIG. 9 is a diagram illustrating the operation of a pair of folding rolls 40;

FIG. 10 is an explanatory diagram of the operation of the folding roll 40.

FIG. 11 is a schematic view of an aggregate T.

[Explanation of symbols]

 Reference Signs List 1 cut unit 10 roll with mold 11 groove with mold 12 bar-shaped projection 20 transfer roll 21 projection with mold 22 cutter 30 blade roll 31 blade 40 folding roll 41 movable jaw 42 tucker W web P cut piece T aggregate

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-208122 (JP, A) JP-A-7-291527 (JP, A) JP-A-5-124770 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B65H 45/00-45/30

Claims (3)

(57) [Claims] 1. A pair of left and right cut units, each of which continuously cuts a continuous web fed from a pair of left and right web rolls into cut pieces, and two cut left and right cut pieces. And a pair of left and right folding bars for continuously zigzag folding the cut pieces of the two pieces together, wherein the cut unit comprises the folding unit. A mold groove provided rotatably in synchronization with the roll and extending in the axial direction of the roll, and a bar-shaped projection extending in the axial direction of the roll were alternately provided on the roll peripheral surface along the rotating direction. A mold roll, a mold projection that is rotatably provided in synchronization with the mold roll and the folding roll, and overlaps the mold groove to mold the web; A cutter extending in the axial direction of the roll, a transfer roll provided alternately on the roll peripheral surface along the rotation direction, and a rotatably provided in synchronization with the transfer roll, and shearing with the cutter. A zigzag folding apparatus for a web, comprising: blades capable of cutting the web by means of blade rolls provided on a roll peripheral surface at intervals along a rotation direction. 2. A suction hole for adsorbing the cut piece is provided on the roll peripheral surface of the transfer roll in the vicinity of the mold projection, and in the vicinity of the cutter for sucking the cut piece. 2. The web zigzag folding device according to claim 1, wherein a suction hole is provided. 3. A folding roll wherein a movable jaw and a tucker are alternately provided on a roll peripheral surface along a rotation direction, and a frictional resistance generated between the tucker and the cut piece as a material of the tucker. 3. The web zigzag folding device according to claim 1, wherein a material that is smaller than a frictional resistance generated between the cut pieces is selected.