JPH06263176A - Method and apparatus for piling up of saturated sheet - Google Patents

Abstract

PURPOSE:To prevent early wearing-down of a cutting knife, and to ensure piling up of sheets in the case where a pop-up method is employed. CONSTITUTION:A long sheet that is conveyed in continuity is cut traverse at every specified length, the rear of the cut sheet S on the downstream side and the front of the cut sheet S on the upstream side are overlapped each other and saturation is made under such state by spraying liquor. While the cut sheets S are made to pass successively between a pair of folding rollers 40 and 41, an inward folding crease is formed first for folding the face opposite to the face on the overlapped side on a position in the middle in the longitudinal direction of the cut sheet S to be folded, and the inward folding crease is formed secondly for folding the face on the overlapped side. The cut sheets S so folded are successively received in the lower side and are delivered to the outside when the cut sheets are piled up in specified numbers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for stacking impregnated sheets such as so-called wet tissues and wet towels, and finally stores them in a container in units of a plurality of sheets and takes them out in a so-called pop-up type. It allows you to do things.

[0002]

2. Description of the Related Art With the modernization of daily life, wet tissues and combs are often used. In the case of a wet towel, a non-woven fabric is mainly used as a material and is impregnated with a chemical solution such as a cleaning agent or an antibacterial agent.

In the first manufacturing method, generally, a continuous nonwoven sheet is impregnated with a chemical solution, and then cut into predetermined lengths to obtain cut sheet pieces, which are then stacked in a container and housed in a container. There is. As a second method, a continuous nonwoven fabric sheet may be cut into a large number of cut sheet pieces, and a large number of the cut sheet pieces may be stacked and then impregnated with a chemical solution.

[0004]

However, according to the first method, when the wet continuous sheet is cut to a predetermined length by the cutting blade, the life of the cutting blade becomes extremely short. Furthermore, the cutting itself is not smooth and the cut surface is not beautiful. In addition, according to the second method, when a large number of cut sheet pieces are stacked and then impregnated with the chemical liquid, the chemical liquid may not be partially impregnated by the sheet (a sheet having water repellency and poor impregnation property). Repulsive force acts between the sheets during stacking, resulting in high bulkiness, which causes contact with the equipment and catching during the subsequent line processing, which makes the handling difficult in line processing.

On the other hand, when the cut sheet pieces are simply stacked and housed in the container as they are, it is necessary to open the lid and take out each time of use. On the other hand, when a so-called pop-up method is adopted in which a take-out port is formed in the lid part of the container, and when one sheet is taken out from the take-out port, the tip of the next one cutting sheet piece makes a face out of the take-out port, It is convenient for taking out. For this purpose, it is necessary to overlap the rear part of each cut sheet piece with the front part of the next cut sheet.

Therefore, the main object of the present invention is to prevent the life of the cutting blade from being shortened, to have excellent impregnation uniformity and processability in the line, and to adopt a pop-up system. is there.

[0007]

According to the method of the present invention for solving the above-mentioned problems, a step of transversely cutting a continuously conveyed long sheet at a predetermined length, and a cut sheet piece on the downstream side which has already been cut The step of superimposing the rear part and the front part of the upstream cut sheet piece, in this superposed state, the step of spraying a liquid to impregnate, and sequentially cutting the cut sheet piece in the superposed state between a pair of folding rolls. In the process of passing through, in the middle of the length direction of each cut sheet piece, first form an inner fold line on the opposite side to the overlapping side surface of the target cut sheet piece,
It is characterized in that it has a step of forming an inward folding line on the overlapping face and a step of successively receiving and stacking these cut sheet pieces in sequence.

In the apparatus of the present invention, the first cutter roll and the second cutter roll are arranged as a pair so as to face each other, and a long sheet passing between them is rotated by the cutter rolls in the conveying direction. In the cutting means provided in at least one of the cutter rolls to cut a predetermined length into a cutting sheet piece with a cutting blade, and provided on one of the cutter rolls, on the downstream side of the cutting blade, the cutting just cut. A vacuum means for sucking and holding the leading end of the sheet piece, a means arranged at the exit side of the cutter roll for carrying at a carrying speed slower than the peripheral speed of the cutter roll, and a downstream side of the carrying means. It is characterized by having means for impregnating the cut sheet pieces with a liquid and means for stacking the cut sheet pieces.

In a second apparatus of the present invention, a first cutter roll and a second cutter roll are arranged as a pair so as to face each other, and a long sheet passing between them is rotated by each of the cutter rolls in the conveying direction. In the process, cutting means for cutting a predetermined length by a cutting blade provided on at least one of the cutter rolls to form a cut sheet piece, and a conveying speed slower than the peripheral speed of the cutter roll disposed on the exit side of the cutter roll. And a deviation means for disposing only a rear portion of a cut sheet piece cut by the cutting means, the means being provided in the conveyance means or between the conveyance means and the cutting means. And a means for impregnating the cut sheet pieces with the liquid on the downstream side of the conveying means, and a means for stacking the cut sheet pieces.

[0010]

In the method of the present invention, since the long sheet is transversely cut into predetermined lengths before impregnation with the chemical liquid, the life of the cutting blade is extended. Further, since the impregnation of the chemical liquid is performed in the sheet state before stacking, even if the sheets have poor impregnating property, the chemical liquid can be uniformly impregnated, and since the whole is already impregnated before stacking, Since the repulsive force at the time point is suppressed and the bulkiness is low, the handling property and handling property in the post-processing line are good in terms of processing.

Further, the rear part of the cut sheet piece on the downstream side and the front part of the cut sheet piece on the upstream side are superposed, and in this superposed state, liquid is sprinkled to impregnate, and the superposed state is sequentially cut. In the process of sequentially passing the sheet pieces between a pair of folding rolls, in the middle of the length direction of each cut sheet piece, first, an inner fold line is formed on the opposite side surface and the opposite side surface of the target cut sheet piece, and then the overlap side surface is formed. Since an inward fold line is formed on the sheet, when a predetermined number of sheets are stacked, the so-called sequential Z
Stacked in a folded state.

Therefore, by storing this in a container, a pop-up structure is obtained.

On the other hand, in the apparatus of the present invention, one of the cutter rolls for cutting into a cut sheet is provided with vacuum means, and the rear portion of the cut sheet piece just cut is provided on the downstream side of the cutting blade attached to this cutter roll. It is possible to partially overlap the cut sheet pieces by sucking and holding the cut sheet pieces, and by using the conveying means arranged on the exit side of the cutter roll at a conveying speed lower than the peripheral speed of the cutter roll.

Further, in the second aspect of the apparatus of the present invention, only the rear portion of the cut sheet piece cut by the cutting means is provided in the conveying means or between the conveying means and the cutting means and the conveying line is provided. By using the displacing means for displacing the sheet from the plane, the tip ends of the cut sheet pieces that are linearly fed later overlap each other, whereby the cut sheet pieces can partially overlap each other.

Further, the apparatus structure is simple and the equipment cost does not increase.

[0016]

The present invention will be described in more detail below. For ease of explanation, firstly, referring to the overall view of the equipment of FIG. 2 with reference to the folding mode viewed from the sheet side in FIG. 1, conceptually, the winding long roll sheet 1 will be described. If one roll is continuously fed, the tip of the new roll long roll sheet 1A is fed and the splicer 2
Connect with. The connection part is indicated by reference numeral 2X. Then
While controlling the side edge position by the edge position controller 3, the slitter 4 slits in the middle in the width direction, and each long sheet is valley-folded by the sailor 5. The valley-folded continuous sheet is indicated by reference numeral 5X. Then, the pair of cutter rolls 1 is moved by the feed conveyor 6.
A cut sheet piece S is obtained by transversely cutting a predetermined length between 0 and 11.

After that, the cut sheet pieces are successively impregnated with the chemicals by being fed into the shower room 30 by the stacking conveyors 20 and 21 and being sprayed with the chemicals by the shower 31. The chemical solution is in the tank 32
Is supplied to the shower 31 by the metering pump 33.

Next, Z-folding is performed by the folding rolls 40 and 41. The Z-folded cut sheet pieces S are sequentially received by the stocker 50 from below, and when a predetermined number of sheets are reached, they are paid out, received by the lifter 51, and lowered to a level on the line 52. It is sent to the filling process.

In the present invention, the front end portion of the next cut sheet piece S is superposed on the rear portion of the preceding cut sheet piece S before the impregnation with the chemical liquid. This aspect is shown in FIGS.

That is, the upper cutter roll 10 is provided with the cutting blade 12, and the lower cutter roll 11 is provided with the receiving blade 13. Further, the conveying speed of the superposing conveyors 20 and 21 is set lower than the peripheral speed of the cutter rolls 10 and 11 by the superposition margin.

Further, a vacuum port 14a is opened on the outer peripheral surface of the lower cutter roll 11 at the front of the cutting direction by the receiving blade 13 in the direction of rotation, and the suction system 1 is provided therein.
Contact 4 in advance.

As a result, the rear end of the cut sheet S after cutting advances while being wound around the upper cutter roll 10 by suction winding, and as a result, the rear end of the cut sheet S is pushed downward, In this state, the leading edge of the next straight-moving continuous sheet 5X having a fast moving speed catches up and rides on the rear end portion of the preceding cut sheet piece S. Therefore, the ends are overlapped with each other.

The superposing conveyors 20 and 21 can also be used for superposition according to the second aspect of the present invention, together with the deviation means provided on the cutter roll or separately. That is, as also shown in FIG. 5, the downstream side of the lower stacking conveyor 21 is inclined at a certain angle, and a vacuum box 21B constituting a displacement means is disposed on the inclined portion 21A. ing. Further, the conveyor belt itself has a large number of through holes 21a.

As a result, the rear end portion of the cut sheet piece S is pushed downward by the suction through the through hole 21a by the vacuum box 21B, and in this state, the next straight traveling speed is fast. The leading edge of the continuous sheet 5X catches up and rides on the trailing edge of the preceding cut sheet piece S. Therefore, also in this example, the end portions are overlapped with each other.

On the other hand, in this example, the deviation means is provided in the conveying means, but between the conveying means and the cutter roll,
Similar vacuum means may be provided as the displacement means referred to in the present invention. Further, any of the displacing means can be turned upside down, and in this case, the leading end of the next cut sheet piece slips into the rear part of the previous cut sheet piece.

In this way, the cut sheet pieces S, S ... In the superposed state are conveyed and fed into the shower room 30, and the chemical solution is sprayed for the first time. As a result, cutting blade 1
The blade 2 and the receiving blade 13 cut in a dry state instead of a wet state, so that the life of the blade is extended.

The impregnated cutting sheet piece S impregnated with the chemical solution is
It is fed between the folding rolls 40 and 41 while being nipped by the guide roll 42. This folding roll 40,
Z-folding is performed by 41.

The Z-folding mode is shown in order in FIGS. In order to perform this folding operation, each folding roll 40, 4
In FIG. 1, the pushing claw 43 and the recessed grip 44 for receiving the pushing claw 43 are provided in order at 90 degree intervals, and they are formed at corresponding positions. Further, the 180 degree range indicated by hatching is the vacuum region, and has the illustrated angular relationship.

When the leading edge of the group of cut sheet pieces S in the superposed state is conveyed while being wound around the folding roll 40, when the leading edge exceeds the nip position with the folding roll 41 by a certain length, FIG. As described above, the pushing claws 43 of the folding roll 40 are pushed into the grips 44 of the folding roll 41 to form an inner bent line. After that, when the 90-degree folding rolls 40 and 41 rotate, as shown in FIG. 7, the pushing claws 43 of the folding roll 41 reversely move, as shown in FIG.
It is pushed into the grip 44 and an inner bent line is formed. When further rotated 90 degrees, the pushing claw 4 of the folding roll 40 is moved to the next cut sheet piece S as shown in FIG.
3 is pushed into the grip 44 of the folding roll 41 to form an inner fold line. Such inward folding is sequentially performed.

As a result, in the middle of the lengthwise direction of each cut sheet piece S, first, an inner fold line is formed on the surface opposite to the overlapping side surface of the target cut sheet piece S (the lower surface in the conveying process). 8), after which an inner fold line is formed on the overlapping wales surface (the upper surface in the carrying process). As a result, as shown in FIG. 9, Z-folding is performed in the overlapping state.

On the other hand, by shifting the position of FIG. 6 by 90 degrees, folding can be performed as shown in FIG. Further, as shown in FIG. 11, three folding rolls 40, 4
It can also be folded using 1, 45.

These methods are selected by the physical properties such as elasticity, Young's modulus and rigidity of the cut sheet pieces to be cut, and the ease of pop-up after stacking.

The stacking in the embodiment is performed on the stockers 50, 50 as shown in FIG. The stockers 50, 50 are such that the receiving arm or plate rotates 180 degrees around the horizontal rotation axis, and when the predetermined number of sheets, for example 50, is reached, the receiving arm rotates 180 degrees downward and cuts. The bundle of sheet pieces is transferred to the lifter 51 that has been raised. When this transfer is completed, the receiving arm rotates in the opposite direction by 180 degrees and waits for the completion of the next stacking. The lifter 51 having received the bundle descends to a level on the line 52, and at that time, the pusher 53 pushes it to the right to send it to a packing process (not shown) in a container. When the pusher 53 completes the extrusion, the lifter 51 rises and waits for the stockers 50, 50 to dispense.

In FIG. 13, the cut sheet pieces S,
As the superposition margin L of S, 7 to 30 mm has been found to have a good pop-up property.

[0035]

As described above, according to the present invention, the life of the cutting blade is prevented from being shortened, the uniformity of impregnation and the processability in the line are excellent, and the sheet in the case of adopting the pop-up system is used. Stacking can be performed reliably.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a stacking process of the present invention in a sheet folding mode.

FIG. 2 is a schematic view of a stacking device of the present invention.

FIG. 3 is a detailed view of a main part thereof.

FIG. 4 is a perspective view of a cutter roll portion.

FIG. 5 is a perspective view of a stacking conveyor.

FIG. 6 is a first step diagram of Z-folding.

FIG. 7 is a second step diagram of Z-folding.

FIG. 8 is a third step diagram of Z-folding.

FIG. 9 is a fourth step diagram of Z-folding.

FIG. 10 is another Z-folding pattern diagram.

FIG. 11 is another Z-folding device configuration diagram.

FIG. 12 is a schematic diagram of a stacking device.

FIG. 13 is an explanatory diagram of a lap allowance.

[Explanation of symbols]

S ... Cut sheet pieces, 10, 11 ... Cutter roll, 2
0, 21 ... Stacking conveyor, 30 ... Shower room, 40, 41 ... Folding roll.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 15, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (3)

[Claims] 1. A step of transversely cutting a continuously conveyed long sheet at a predetermined length, comprising a rear portion of a downstream cut sheet piece which has already been cut and a front portion of an upstream cut sheet piece. Step of superposing, step of impregnating by spraying liquid in this superposed state, step of passing sequentially cut sheet pieces between a pair of folding rolls in superposed state, in the lengthwise middle of each cut sheet piece In the above, in order to form an inner fold line on the side opposite to the overlapping side surface of the target cut sheet pieces, and then to form an inner fold line on the overlap line, there is a step of sequentially receiving and stacking these cut sheet pieces. A method for stacking impregnated sheets, comprising: 2. A first cutter roll and a second cutter roll are arranged so as to face each other as a pair, and at least one cutter is provided in the process of rotating the long sheet passing between them in the conveying direction. Cutting means for cutting a predetermined length with a cutting blade provided on the roll to form a cut sheet piece, and provided on one of the cutter rolls, on the downstream side of the cutting blade, the tip portion of the cut sheet piece just cut A vacuum means for sucking and holding, a means arranged at the exit side of the cutter roll and carrying at a carrying speed slower than the peripheral speed of the cutter roll, and a cut sheet piece on the downstream side of the carrying means. An impregnated sheet stacking device comprising: a means for impregnating a liquid; and a means for stacking cut sheet pieces. 3. A first cutter roll and a second cutter roll are arranged so as to face each other as a pair, and at least one of the cutter rolls is in the process of rotating a long sheet passing between them in the conveying direction. A cutting means for cutting a predetermined length by a cutting blade provided on the roll into a cut sheet piece; a means arranged at the exit side of the cutter roll and carrying at a carrying speed slower than the peripheral speed of the cutter roll; Displacement means provided in the transport means or between the transport means and the cutting means, for displacing only the rear portion of the cut sheet piece cut by the cutting means from the transport line surface; An impregnated sheet stacking device comprising: a means for impregnating cut sheet pieces with a liquid on the downstream side; and a means for stacking the cut sheet pieces.