JP2006131393A - Method of manufacturing sanitary sheet and manufacturing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing 16-ply sanitary sheets by a series of mechanical processes without requiring manual work by a person, and to provide a manufacturing device for efficiently providing the 16-ply sanitary sheets by using this method. <P>SOLUTION: This method for manufacturing the sanitary sheet S3 is composed of a first folding process of forming a 2-ply by bending a continuously supplied sheet-like raw material S having a predetermined width, a second folding process of forming a 4-ply by bending a 1/2 width raw material supplied from the first folding process, a cutting process of providing a cut raw material by cutting a 1/4 width raw material supplied from the second folding process in the carrying direction, a third folding process of forming an 8-ply by bending the cut raw material supplied from the cutting process in the carrying direction, and a fourth folding process of forming a 16-ply by bending the raw material supplied from the third folding process in the carrying direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for manufacturing a sanitary sheet formed from a sanitary material such as a nonwoven fabric.

In recent years, sanitary sheets formed by folding sanitary materials such as non-woven fabrics are often used in medical practice. For example, it is applied to an instilled part and used to absorb body fluids or the like. In medical practice, a 16-layer (16 ply) sanitary sheet is preferably used in order to obtain a feeling of texture. For the 16 sheets of sanitary sheets, the manufacturing apparatus 1 shown in FIG. 10 and the manufacturing method shown in FIG. 11 are generally used. FIG. 10 shows a manufacturing apparatus 1 that manufactures a sanitary sheet (see FIG. 11E) through a predetermined process in order from the sheet material S. In FIG. 11, the outline of the process of manufacturing the sanitary sheet shown on the left side in order from the sheet material S shown on the right side corresponding to the manufacturing apparatus 1 is shown step by step. In the manufacturing apparatus 1, for example, an original fabric roll 10 around which a sheet-like material S having a width of 300 mm is wound is disposed. In FIG. 10, the feeding belt 12 abuts on the original fabric roll 10 and rotates counterclockwise, thereby feeding out and transporting one sheet (1 ply) of the sheet material S. This step corresponds to step 1 shown in FIG. The sheet-like material S is folded in half while being brought into contact with the triangular guide plate 92 via the guide rolls 91a, 91b, and 91c, and becomes two-ply (2ply) having a width of 150 mm. This step corresponds to step 2 shown in FIG. The two sheets of sheet material S are guided by guide rolls 92a, 92b, and 93c and conveyed while being sandwiched between two swinging rolls 94a and 94b arranged in parallel (in a direction perpendicular to the paper surface in FIG. 10). The Then, the two sheets of sheet material S are swung in the left-right direction with respect to the product alignment table 80 by the swing rolls 94a and 94b, and a number of wave shapes of the sheet material S are formed. Specifically, as shown in Step 3 of FIG. 11, two sheets of sheet material S are hooked on a roll claw 96 provided on a part of the outer periphery of the swing rolls 94a and 94b and shaken in the left-right direction. Form a wave shape. This wave-shaped portion is cut in half by being pressed against a band knife 95 that is fixed in the vertical direction with respect to the product alignment table 80 to form a four-layered (4 ply) square shape with a side of 150 mm. Then, the operator folds the four stacked sheets in half to form 8 stacked sheets (8 ply), and further folds in half to form 16 stacked sheets. This step corresponds to step 4 shown in FIG. Then, a 16-layer sanitary sheet having a side of 75 mm is obtained.
Patent document 1 shown below is mentioned as a related technique of this kind.

JP 2001-192170 A

  However, in the above-described conventional technique, the operation of folding four sheets to make eight sheets and the process of further folding eight sheets to make sixteen sheets are both performed manually. It was. That is, since the operation of folding from a four-layered sheet to a 16-layered sheet is a manual fold, it is troublesome for the operator. In addition, there is a problem that work efficiency is poor because it is performed manually.

  The present invention has been made in view of the above-described problems, and the problem to be solved by the present invention is that a manual operation by humans is not required, and a 16-layer sanitary sheet is obtained by a series of mechanical processes. It is in providing the manufacturing method which manufactures. Furthermore, it is providing the manufacturing apparatus for obtaining the hygienic sheet | seat of 16 sheets efficiently using the said manufacturing method.

In order to solve the above-mentioned problems, the present invention takes the following means.
First, the first invention is a method for manufacturing a sanitary sheet formed by being folded into a plurality of sheets, and a sheet-like material having a predetermined width that is continuously supplied from the edge in the width direction. A first folding process in which the sheet is folded by a half width of the material width and two sheets are stacked, and a half width material supplied from the first folding process is further folded in half in the width direction to be 1 / A second folding process in which four sheets are stacked in four widths, and a quarter-width material supplied from the second folding process is cut to a length four times the supplied material width in the transport direction. A cutting process for obtaining a cutting material in this way, a third folding process in which the cutting material supplied from the cutting process is folded in half at a length of 1/2 in the conveying direction to form eight sheets, and the third folding process The material supplied from the folding process is further halved in the conveying direction. A fourth folding step of the bending 16 ply Ri is a sanitary sheet manufacturing method comprising a.

  According to 1st invention, the sheet-like raw material supplied continuously by the 1st process is bend | folded by the 1/2 width | variety of the width | variety, and becomes 2 sheets overlap. Next, the material that has been overlapped in the first folding step by the second step is further folded in the width direction to become four overlaps. Next, the material stacked in four sheets in the second folding step in the conveyance direction by the cutting step is cut to a length four times the material width. Next, in the third folding step, the cut material is folded in half with a length of 1/2 in the conveying direction, and eight sheets are stacked. Next, the material that has been stacked by 8 sheets in the 3rd folding process by the 4th folding process is further folded by half the length to be 16 sheets. Thus, according to this invention, since it is comprised by a series of mechanical processes, the manual operation by a person is not required. In addition, since the entire process from the cutting process to the fourth folding process is performed in the sheet conveyance direction, the transition between the processes is smoothly performed.

Next, a second aspect of the present invention is the sanitary sheet manufacturing method according to the first aspect of the present invention, wherein the first folding step includes the edge of the sheet-like material having a predetermined width that is continuously supplied. A length of 1/4 in the width direction is folded inward from the center of the material to the center of the material to form two sheets.
According to 2nd invention, since the edge of a sheet-like raw material is bend | folded inside, this edge is not exposed to the outer peripheral site | part of a sanitary sheet. That is, the sanitary sheet is less likely to be contaminated with dust and the like, and can be used in a cleaner state, and a product with good appearance can be obtained.

  Next, a third invention is characterized in that, in the sanitary sheet manufacturing method according to the first invention or the second invention described above, the material is a non-woven fabric. According to the third invention, when a non-woven fabric is used as the sheet-like material, it becomes easy to process, so that a sanitary sheet can be obtained in a mass production.

Next, a fourth invention is a sanitary sheet manufacturing apparatus formed by being folded into a plurality of sheets, the supply means for continuously supplying a sheet material having a predetermined width, and the continuous supply A first folding means that folds the sheet-shaped material having a predetermined width from the edge of the sheet material in the width direction by a half width of the material width to overlap two sheets, and is supplied from the first folding step. A second folding means that further folds the half-width material in half in the width direction and wraps four sheets into the quarter width; and the quarter-width material supplied from the second folding step Cutting means for obtaining a cutting material by cutting it at a length four times the width of the supplied material in the conveying direction, and cutting material supplied from the cutting step at a length of ½ in the conveying direction. A third folding means that folds the sheet in half and stacks eight sheets, and the third folding step A fourth folding means for the material to be supplied with further bent 16 ply a length of 1/2 in the conveying direction, a manufacturing apparatus of a sanitary sheet made of.
According to 4th invention, since it comprises from each means provided with each said process, a sanitary sheet can be obtained efficiently.

The present invention can obtain the following effects by taking the above-described means.
First, in the first invention, 16 sheets can be manufactured by a series of mechanical processes without requiring manual operation by a person. Moreover, a sanitary sheet can be easily obtained by performing a series of steps mechanically.
Next, according to the second invention, a sanitary sheet having a good appearance can be obtained, and the sanitary sheet is less likely to be contaminated with dust and the like, so that the sanitary sheet can be used in a more clean state. .
Next, according to the third aspect of the invention, the sanitary sheet is manufactured from a non-woven fabric, so that the sanitary sheet can be obtained in mass production.
Next, according to the 4th invention, a sanitary sheet can be obtained efficiently by the manufacturing apparatus comprised from each folding process and a cutting process.

Hereinafter, embodiments of a method for manufacturing a sanitary sheet and a manufacturing apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a side view illustrating a configuration of a manufacturing apparatus 1 that manufactures a sanitary sheet S3. FIG. 2 is an explanatory view schematically showing a method for manufacturing the sanitary sheet S3.
As shown in FIG. 1, an original fabric roll 10 around which a sheet-like material S is wound is installed on the left side of the manufacturing apparatus 1. The original roll 10 rotates in the clockwise direction around the roll shaft 21. A feeding belt 12 is installed above the original roll 10 and, for example, contacts the sheet-like material S having a sheet width of 300 mm and rotates counterclockwise to feed the sheet-like material S in the arrow direction A1. Thus, the sheet material S is continuously supplied in the arrow direction A1 in FIG. The feeding belt 12 is configured to be actively driven by a drive motor (not shown). The feeding belt 12 corresponds to the supply means described in claim 4.

Next, the first folding process will be described. This first folding step corresponds to the contents shown in FIG. 2 (a) to FIG. 2 (b).
FIG. 3 is a perspective view showing the configuration of the guide plate 20. FIG. 4 is an explanatory diagram showing the shape of the sheet-like material S viewed from the arrow direction A2 of FIG. As shown in FIG. 3, the continuously supplied sheet material S is guided by the guide roll 21, and the sheet material S is guided by the guide plate 20 composed of the inclined plate 20a, the holding plate 20b, and the folded plate 20c. It is folded to ½ width and overlapped. Specifically, first, both end edges of the sheet material S are inclined inward along the outer side of the trapezoidal inclined plate 20a. Next, the inclined sheet-like material S includes a folded plate 20c attached to a holding plate 22c extended from the fixed shaft 22, and a holding plate 20b attached to holding members 22a and 22b extended from the holding plate 22c. It is passed (transferred) while being sandwiched between. Further, the edge of the sheet-like material S is bent inward at a length of 1/4 in the width direction from the edge to the center by being along the outside of the folding plate 20c. As a result, the edge is not exposed to the outer peripheral portion of the sanitary sheet, so that the sanitary sheet is not easily contaminated with dust. And the sheet-like raw material S bent by 1/4 length is supplied to a 2nd process via the guide rolls 31, 32, and 33. FIG. FIG. 4 shows a state in which a single sheet-like material S (1ply) is folded to a half width as it is supplied from below to become two-ply (2ply). The sheet width is from 300 mm to 150 mm. The guide plate 20 corresponds to the first folding means described in claim 4.

Next, the second folding process will be described. This second folding step corresponds to the contents shown in FIGS. 2B to 2C.
FIG. 5 is a perspective view showing the configuration of the guide plate 30. FIG. 6 is an explanatory view showing the shape of the sheet-like material S viewed from the arrow direction A3 of FIG. As shown in FIG. 5, the ½-width sheet material S supplied from the first folding step is guided by the guide roll 33, and is composed of an inclined plate 30a, a pressing plate 30b, and a mounting plate 30c. The guide plate 30 is bent to a quarter width of the sheet material S to form four sheets (4 ply). Specifically, as shown in FIG. 5, the right edge of the sheet material S is inclined from the lower side to the upper side along the right outer edge of the inclined plate 30 a in a direction orthogonal to the paper surface in FIG. 5. Inclined and bent. Next, the inclined sheet-like material S includes a mounting plate 30c attached to a holding plate 34c extended from the fixed shaft 34, and a holding plate 30b attached to holding members 34a and 34b extended from the holding plate 34c. And is passed (transferred) while being sandwiched between the two, and is further folded to a half width to form four sheets. FIG. 6 shows a state in which two sheets of sheet-like material S are bent to half the width as they are supplied from below to form four sheets, and the sheet width is 150 mm. To 75 mm. The guide plate 30 corresponds to the second folding means described in claim 4.

Hereinafter, the cutting process and the third folding process will be described in detail in order. The cutting process corresponds to the contents shown in FIGS. 2C to 2D, and the third folding process corresponds to the contents shown in FIGS. 2D to 2E.
The quarter-width sheet material S supplied from the second folding step is conveyed to forward rolls 43 and 44 disposed adjacent to each other via guide rolls 41 and 42 shown in FIG. The forward roll 43 rotates clockwise around the axis 43a, the forward roll 44 rotates counterclockwise around the axis 44a, and the sheet material S is sandwiched between the forward rolls 43, 44. 1 is conveyed downward. Under the forward rolls 43 and 44, a receiving blade roll 51 and a cutting blade roll 52 are disposed adjacent to each other. The receiving blades 51 b and 51 b are fixed at a predetermined symmetrical position of the receiving blade roll 51, and the cutting blades 52 b and 52 b are fixed at a predetermined symmetrical position of the cutting blade roll 52. A cutting process is performed in which the sheet material S is cut by a length four times the material width by the receiving blade 51b and the cutting blade 52b. Further, at a predetermined symmetrical position of the receiving blade roll 51, an opening 51c in an air suction means for attracting the sheet material S to the surface of the receiving blade roll 51 with a suction force is provided. The receiving blade 51b and the cutting blade 52b correspond to the cutting means described in claim 4.

  FIG. 7 is an explanatory diagram showing operations of the receiving blade roll 51, the cutting blade roll 52, and the like from the cutting process to the third folding process. In FIG. 7, the arrangement relationship between the sheet material S and the receiving blade roll 51 is shown on the right side, and the shape state of the sheet material S is shown on the left side. As shown in FIG. 7A, below the receiving blade roll 51, conveying rolls 61 and 62 for conveying the cutting material S <b> 1 are disposed adjacent to the outer periphery of the receiving roll 51 so as to be displaced. The transport roll 61 rotates clockwise about the support shaft 61a, and the transport roll 62 rotates counterclockwise about the support shaft 62a. Rotating belts 61b and 62b are hung around the outer circumferences of both rolls 61 and 62, respectively. As a result, the contact surfaces extending in the vertical direction of the rotating belts 61b and 62b with respect to the vertical tangent of the receiving blade roll 51 and the cutting roll 52 are displaced from the center of the receiving roll 51 toward the outer periphery. Is set.

  As shown in FIG. 7B, the sheet material S is sandwiched between the receiving blade roll 51 and the cutting blade roll 52, and is sandwiched between the rotating belt 62 b while being wound around the receiving blade roll 51. Thereafter, since the leading end portion of the sheet-shaped material S is attracted to the opening 51 c of the receiving blade roll 51, the sheet-shaped material S is wound around the receiving blade roll 51.

  Next, as shown in FIG. 7C, after the sheet material S is wound around the receiving blade roll 51 by a half turn, it is cut by the engagement of the receiving blade 51b and the cutting blade 52b to become a cutting material S1. The size is 75 mm × 300 mm in length and width as shown in FIG. That is, the length of the half circumference of the receiving blade roll 51 is set to be four times the sheet width. As a result, the sheet can be cut mechanically and accurately at a length four times the sheet width.

  Next, as shown in FIG. 7D, the cutting material S1 is conveyed in this rotational direction by the frictional force between the cutting material S1 and the rotating belt 62b and the positive rotating force of the rotating belt 62b. Then, the cutting material S1 is sandwiched between the rotating belts 61b and 62b, and is folded in half at half the length in the conveying direction to form eight sheets (FIG. 7C). In other words, the cutting material S1 has a substantially U shape, and the center portion of the bottom of the curved portion is pulled between the rotating belts 61b and 62b, whereby the cutting material S1 is deformed into a substantially Y shape). The size of the half-folded material S2 that is folded in half and becomes 8 sheets (8 ply) is 75 mm × 150 mm in length and width as shown in FIG. The two adjacent rotating belts 61b and 62b correspond to a third folding means described in claim 4.

Hereinafter, the fourth folding step will be described in detail.
FIG. 8 is an explanatory diagram showing the progress of the fourth folding step. This fourth folding step corresponds to the illustration from FIG. 2 (e) to FIG. 2 (f). In FIG. 8, the arrangement relationship between the cutting material S1 and the transport roll 61 is shown on the right side, and the shape state of only the half-fold material S2 or the sanitary sheet S3 is shown on the left side.
As shown in FIG. 8A, the transport roll 71 is provided below the transport roll 61 and rotates clockwise about the support shaft 71a. The rotating belt 61b is hung on the outer sides of both conveying rolls 61 and 71 arranged in the vertical direction. The rotations of both transport rollers 61 and 71 are synchronized, and the rotating belt 61b rotates in the clockwise direction. A transport roll 72 is provided below the transport roll 62 adjacent to the transport roll 61, and rotates counterclockwise about the support shaft 72a. In FIG. 8A, a transport roll 73 is provided in the lower right direction of the transport roll 62, and rotates counterclockwise about the support shaft 73a. The rotations of the transport rollers 62, 72, and 73 are synchronized with the rotation of the transport rollers 61 and 71. The rotating belt 62b is hung on the outer periphery of conveyance rolls 62, 72, 73 provided in three directions and rotates counterclockwise. A transport roll 82 is provided below the transport roll 72 and rotates clockwise about a support shaft 82a. A transport roll 83 is provided below the transport roll 73 and rotates clockwise about the support shaft 82a. Both transport rolls 82 and 83 are synchronized in rotation with the transport rolls 61 and 71. The rotating belt 82b is hung around the outer side of the conveyance rolls 82 and 83 provided in the left-right direction, and rotates clockwise. The transport rolls 61, 62, 71, 72, 73, 82, 83 are all set to have the same rotational synchronization, and are formed in three belt grooves (not shown) formed in the width direction of each roll. The three rubber rotating belts 61b, 62b and 82b are hung.

  Since the transport rolls 61 and 62 and the transport rolls 71 and 72 are arranged adjacent to each other in the left-right direction in FIG. 8, the rotating belts 61b and 62b are close to each other in the adjacent directions. The half-folded material S2 supplied from the third step is sandwiched between the rotating belts 61b and 62b and is conveyed downward in FIG. 8A. In the conveyance direction of the half-folded material S2, a direction changing plate 81 for changing the conveyance direction of the half-folded material S2 and further folding the half-folded material S2 further below the substantially central portion where the conveyance rolls 71 and 72 are opposed to each other. It is provided in an oblique shape.

  Next, as shown in FIG. 8 (b), the half-folded material S <b> 2 is conveyed and the tip portion thereof abuts on the deflecting plate 81. The conveyance direction of the half-folded material S2 is changed from the lower direction to the lower left direction in FIG. That is, the tip portion of the half-folded material S2 is placed on the direction change plate 81 and is swung in the lower left direction in FIG.

Since the transport rolls 72 and 82 and the transport rolls 73 and 83 are arranged adjacent to each other in the vertical direction in FIG. 8, the rotating belts 62b and 82b are close to each other in the adjacent direction. And while the front-end | tip part of the half-folded material S2 is mounted on the direction change plate 81, the intermediate position (half length position of the half-folded material S2) of the half-folded material S2 is by frictional force with the rotating belt 62b. The rotating belt 62b is pulled in the rotating direction (right direction in FIG. 8C). Then, the half-folded material S2 is sandwiched between the rotating belts 62b and 82b, and is further folded in half by a half of the length in the transport direction to form 16 sheets (16 ply). The size of the 16 sheets of sanitary sheet S3 is 75 mm × 75 mm (square shape) in length and width as shown in FIG. The two adjacent rotating belts 62b and 82b and the deflecting plate 81 correspond to a fourth folding means described in claim 4.
As described above, a 16-layer sanitary sheet can be manufactured by the above-described series of mechanical steps without requiring manual work. Moreover, the sanitary sheet | seat of 16 sheets can be obtained efficiently by using the manufacturing apparatus 1 using such a process.

  FIG. 9 is a side view showing the conveyance process of the sanitary sheet S3. As shown in FIG. 9, conveyance rolls 74 and 84 are provided on the right side of the conveyance rolls 73 and 83. The transport roll 74 rotates counterclockwise about the support shaft 74a, and the transport roll 84 rotates clockwise about the support shaft 84a. Moreover, the conveyance rolls 74 and 84 are arrange | positioned adjacently in the up-down direction, and the rotating belts 73b and 83b are respectively hung on the outer periphery of the conveyance rolls 73 and 74 and the conveyance rolls 83 and 84, respectively. The rotation of the transport rollers 74 and 84 is synchronized with the rotation of the transport rollers 73 and 83. The sanitary sheet S3 is conveyed while being sandwiched between the rotating belts 73b and 83b and protrudes from the conveying rolls 74 and 84. FIG. 9 shows a state where the sanitary sheet S <b> 3 protrudes from the transport rolls 74 and 84.

  Next, the sanitary sheet S3 is pushed in the arrow direction A4 by the pushing means 88 mainly composed of the crank mechanism shown in FIG. The push-out means 88 is a first link rotatably supported via a rotary disc 85 having a rotary shaft 85a as an axis, and a first support shaft 86b whose one end is eccentric from the axis of the rotary shaft 85a. An arm 86 and a second link arm 87 having one end rotatably supported via a second support shaft 87a on the other end of the first link arm 86 are provided. An extruding portion 87b that pushes out the sanitary sheet S3 is provided at the tip portion of the second link arm 87. Therefore, the rotation of the first link arm 86 due to the rotation of the turntable 85, and the second link arm 87 is converted by the vertical movement along with this rotation, and the sanitary sheet S3 is moved in the arrow direction A4 by the extrusion of the pushing portion 87b. Extruded. Thereby, the sanitary sheet can be obtained efficiently and mass-produced.

  Next, as shown in FIG. 1, the extruded sanitary sheets S3 are sequentially arranged on the product alignment table 80 in the conveyance path 80a. As a result, the operator only needs to take out the sanitary sheets S3 arranged and arranged in front of the product alignment table 80, and since there is no manual folding work, the 16-layer sanitary sheets S3 can be obtained easily.

The present invention is not limited to the configuration of the above embodiment, and can be implemented in various other forms.
In the above embodiment, in the first folding step, the sheet-like material S is folded inward from the edge of the sheet material by a quarter length in the width direction to form two sheets, but in the first step, the sheet is stacked. It is also possible to fold the material into two pieces by folding the half of the edge together.
Moreover, although the example which uses a nonwoven fabric as a sheet-like raw material was shown in the said embodiment, various sanitary materials, such as gauze and absorbent cotton, can also be used.
Furthermore, the sanitary sheet obtained by the production method of the present invention can be used not only for medical purposes but also for various uses such as cosmetics.

It is a side view which shows the structure of the folding apparatus of this embodiment. It is explanatory drawing which shows the outline of the manufacturing method of the sanitary sheet in this embodiment. It is a perspective view of the guide plate used at the 1st folding process of this embodiment. It is explanatory drawing which shows arrangement | positioning of the sheet-like raw material in the 1st folding process of this embodiment. It is a perspective view of the guide plate used at the 2nd folding process of this embodiment. It is explanatory drawing which shows arrangement | positioning of the sheet-like raw material in the 2nd folding process of this embodiment. It is explanatory drawing which shows the cutting process and 3rd folding process in this embodiment. It is explanatory drawing which shows the 4th folding process in this embodiment. It is explanatory drawing which shows the conveyance process of the sanitary sheet in this embodiment. It is a side view which shows the structure of the manufacturing apparatus of the conventional sanitary sheet. It is explanatory drawing which shows the outline of the manufacturing method of the conventional sanitary sheet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 10 Original fabric roll 12 Feeding belts 20, 30 Guide plates 21, 31, 32, 33, 41, 42 Guide rolls 43, 44 Forward roll 51 Receiving blade roll 51b Receiving blade 52 Cutting blade roll 52b Cutting blades 61b, 62b , 82b Rotating belt 61, 62, 71, 72, 73, 74, 82, 83, 84 Transport roll 80 Product alignment table 81 Turning plate 85 Rotating plate 86 First link arm 87 Second link arm A1, A2, A3, A4 Arrow direction S Sheet material S1 Cutting material S2 Half-fold material S3 Sanitary sheet

Claims (4)

A method for manufacturing a sanitary sheet formed by being folded into a plurality of sheets,
A first folding step in which a sheet-like material having a predetermined width that is continuously supplied is folded from its edge in the width direction by ½ width of the material width to overlap two sheets,
A second folding step in which the half-width material supplied from the first folding step is further folded in half in the width direction so that four sheets are stacked in a quarter width;
A cutting step of cutting a quarter-width material supplied from the second folding step to a length of four times the supplied material width in the transport direction to obtain a cut material;
A third folding step in which the cutting material supplied from the cutting step is folded in half with a length of 1/2 in the conveying direction to form eight sheets;
A sanitary sheet manufacturing method comprising: a fourth folding step in which the material supplied from the third folding step is further folded into a half length in the conveying direction so as to overlap 16 sheets. It is a manufacturing method of the sanitary sheet according to claim 1,
In the first folding step, the sheet-like material having a predetermined width that is continuously supplied is folded inward from the edge to the center of the material by a quarter length in the width direction, and two sheets are stacked. The manufacturing method of the sheet | seat for hygiene characterized by these. A method for producing the sanitary sheet according to claim 1 or 2,
The method for producing a sanitary sheet, wherein the material is a non-woven fabric. A sanitary sheet manufacturing apparatus formed by being folded into a plurality of sheets,
Supply means for continuously supplying a sheet-like material having a predetermined width;
A first folding means configured to fold the sheet-like material having a predetermined width that is continuously supplied from the edge thereof in a width direction by ½ width of the material width to overlap two sheets;
A second folding means for folding the half-width material supplied from the first folding step in half further inward in the width direction and stacking four sheets to a quarter width;
A cutting means for cutting a quarter-width material supplied from the second folding step to a length of four times the supplied material width in the transport direction to obtain a cut material;
A third folding means that folds the cut material supplied from the cutting step into half with a length of 1/2 in the conveying direction;
A sanitary sheet manufacturing apparatus, comprising: a fourth folding unit configured to bend the raw material supplied from the third folding step by a half length in the conveying direction so as to overlap 16 sheets.

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