JP2019041844A - Package manufacturing method and package manufacturing apparatus - Google Patents

Abstract

To manufacture a good looking package (7p).SOLUTION: A package manufacturing method has: a transport step of transporting a continuous sheet (7a) where a display element is repeatedly formed by a first transport section (41) and a second transport section (42); a convergence step of merging absorbent articles to be sequentially merged at a convergence position (Pj) positioned between the first transport section (41) and the second transport section (42); a folding step of folding the continuous sheet (7a); and a cutting step of cutting the continuous sheet (7a) and generating a package (7p). The package manufacturing method is characterized as follows: in the transport step, from the deviation information of the display element, a first transport speed of the first transport section (41) and a second transport speed of the second transport section (42) are increased and decreased to thereby perform the transport control of the continuous sheet (7a) so that absorbent articles may merge at the regular position of the continuous sheet (7a); and the transport control is made so that the second transport speed may be increased when the first transport speed is increased, and the second transport speed may be decreased when the first transport speed is decreased.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a package manufacturing method and a package manufacturing apparatus.

  A sanitary napkin as an example of an absorbent article is provided to the market in the form of a package that is individually packaged in a so-called tri-fold state.

JP 2012-95807 A

  For example, a package that is individually packaged in a state where the napkin is folded in three on the packaging sheet is generated as follows.

A packaging sheet is a continuous sheet in which symbols such as illustrations, product names, and patterns are printed repeatedly and continuously. The continuous sheet of the packaging sheet is conveyed in the conveyance direction by an appropriate conveyance unit such as a conveyance roller. On the other hand, the napkin is transported toward a joining position with the continuous sheet by an appropriate transporting unit such as a conveyor, and is intermittently placed at a predetermined regular position on the pattern of the continuous sheet at the joining position.
And if a napkin is arrange | positioned to a continuous sheet | seat, for example, by the method of [patent document 1], after folding the both ends of the width direction of a continuous sheet | seat inside each to make a continuous sheet of a trifold state, A sealing part is formed in the continuous sheet, and further, the continuous sheet is cut, thereby generating a package.
Here, the print pitch of the symbols printed on the continuous sheet is not necessarily constant, and may vary depending on various factors. And when it fluctuates, it becomes difficult to place the napkin on the regular position of the pattern of the continuous sheet. And if the mounting position of the napkin deviates from the normal position, the package will be poor in appearance as a whole.

  Therefore, in order to manufacture a package having a good appearance, it is necessary to align the napkin on the regular position when the printing pitch varies. A method for adjusting the stretched state of the continuous sheet is conceivable as the positioning method. That is, it is a method of adjusting the position of the continuous sheet so that the napkin joins the normal position of the continuous sheet by adjusting the extension of the continuous sheet for each printing pitch of the continuous sheet.

  However, according to this method, since the elongation of the continuous sheet is adjusted for each printing pitch, the continuous sheet may flutter every time the elongation is released. And if a continuous sheet flutters, in a folding process, it cannot be folded neatly, and a package will become a bad-looking thing as a whole.

  This invention is made | formed in view of the above conventional problems, Comprising: The objective is to make it possible to manufacture a good-looking package.

The main invention for achieving the above object is:
A package manufacturing method for manufacturing a package in which an absorbent article is packaged by a packaging sheet,
A conveying step of conveying the continuous sheet that is a material of the packaging sheet and the display element is repeatedly formed in the continuous direction in the conveying direction by the first conveying unit and the second conveying unit;
For the continuous sheet being conveyed, a merging step of sequentially merging the absorbent article at a merging position located between the first conveying unit and the second conveying unit;
A folding step of folding the continuous sheet so as to wrap the merged absorbent article;
Cutting the folded continuous sheet between the adjacent absorbent articles to produce the package, and
In the transport process,
Based on the deviation information of the display element, by increasing or decreasing the first conveying speed at which the first conveying unit conveys the continuous sheet and the second conveying speed at which the second conveying unit conveys the continuous sheet, respectively. The conveyance control of the continuous sheet is performed so that the absorbent article joins the normal position of the continuous sheet,
In the transport control, when the first transport speed is increased, the second transport speed is increased, and when the first transport speed is decreased, the second transport speed is decreased. It is the packaging body manufacturing method characterized by these.

Also,
A packaging body manufacturing apparatus for manufacturing a packaging body in which an absorbent article is packaged by a packaging sheet,
A first transport unit and a second transport unit that transport the continuous sheet in the transport direction, which is a material of the packaging sheet, and the display element is repeatedly formed in the continuous direction;
A joining device that sequentially joins the absorbent articles at a joining position located between the first transport unit and the second transport unit with respect to the continuous sheet being transported,
A folding part for folding the continuous sheet so as to wrap the merged absorbent article;
A cutting device that cuts the folded continuous sheet between adjacent absorbent articles to generate the package;
Based on the deviation information of the display element, by increasing or decreasing the first conveying speed at which the first conveying unit conveys the continuous sheet and the second conveying speed at which the second conveying unit conveys the continuous sheet, respectively. The conveyance control of the continuous sheet is performed so that the absorbent article joins the normal position of the continuous sheet,
In the transport control, transport is controlled so that the second transport speed is increased when the first transport speed is increased, and the second transport speed is decreased when the first transport speed is decreased. And a control unit.

  Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, a good-looking package can be manufactured.

1A is a schematic plan view of a sanitary napkin 1 as an example of an absorbent article, and FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A. 2A is a schematic perspective view of the napkin 1 disposed on the packaging sheet 7, FIG. 2B is a schematic plan view of a package 7p in which the napkin 1 is packaged by the packaging sheet 7, and FIG. It is the schematic plan view of the package body 7p seen from the reverse side of FIG. 2B. It is a schematic plan view which shows the production | generation process of the package 7p of the napkin 1. FIG. It is a schematic side view of the production line LM of the package 7p of the napkin 1. It is a schematic plan view of the continuous sheet 7a of a packaging sheet. It is a schematic side view of the tape sticking apparatus 71. It is a schematic side view of the sealing cutting device 91. It is a schematic side view of the production line LM of the 1st modification. It is a schematic side view of the production line LM of the 2nd modification.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

A package manufacturing method for manufacturing a package in which an absorbent article is packaged by a packaging sheet,
A conveying step of conveying the continuous sheet that is a material of the packaging sheet and the display element is repeatedly formed in the continuous direction in the conveying direction by the first conveying unit and the second conveying unit;
For the continuous sheet being conveyed, a merging step of sequentially merging the absorbent article at a merging position located between the first conveying unit and the second conveying unit;
A folding step of folding the continuous sheet so as to wrap the merged absorbent article;
Cutting the folded continuous sheet between the adjacent absorbent articles to produce the package, and
In the transport process,
Based on the deviation information of the display element, by increasing or decreasing the first conveying speed at which the first conveying unit conveys the continuous sheet and the second conveying speed at which the second conveying unit conveys the continuous sheet, respectively. The conveyance control of the continuous sheet is performed so that the absorbent article joins the normal position of the continuous sheet,
In the transport control, when the first transport speed is increased, the second transport speed is increased, and when the first transport speed is decreased, the second transport speed is decreased. It is the packaging body manufacturing method characterized by these.

  According to such a packaging body manufacturing method, it is possible to manufacture a packaging body having a good appearance.

Such a package manufacturing method,
In the transport control, it is desirable to perform control to maintain a constant ratio between the first transport speed and the second transport speed.

  According to such a packaging body manufacturing method, it is possible to manufacture a packaging body having a better appearance.

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the transport control, control to match the magnitude of the first transport speed and the second transport speed,
In the sealing cutting step,
The rotating part of the sealing and cutting device having the rotating part and the sealing and cutting part provided in the rotating part rotates the sealing and cutting part intermittently to contact the continuous sheet, and Sealing and cutting the continuous sheet,
By controlling to change the phase of the rotating part, position adjustment is performed so that the sealing cutting position on the continuous sheet is a normal position,
Acquiring deviation information of the display element by an imaging device,
Estimating the amount of deviation from the normal position of the sealing cutting position based on the obtained deviation information,
It is desirable to perform the position adjustment by executing the control according to the estimated deviation amount.

  According to such a packaging body manufacturing method, it is possible to manufacture a packaging body having a better appearance. Moreover, sealing cutting can be performed at an appropriate position of the continuous sheet based on accurate deviation information by the imaging device, and the defect rate can be reduced.

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
The second transport unit is located downstream of the first transport unit in the transport direction,
In the sealing cutting step,
By changing the transport path of the continuous sheet from the second transport unit to the sealing cutting device by the path changing unit, the path length of the transport path is changed,
It is desirable to adjust the position so that the sealing cutting position on the continuous sheet becomes a normal position by the control for changing the path length.

  According to such a package manufacturing method, the appropriate position of the continuous sheet can be cut and sealed, and the defect rate can be reduced.

Such a package manufacturing method,
It is desirable that the path changing unit is located on the downstream side in the transport direction with respect to the folding unit that performs the folding process.

  According to such a package manufacturing method, the position adjusted by the path changing unit is not likely to be shifted due to the folding of the continuous sheet. Therefore, the proper position of the continuous sheet can be sealed and cut, and the defect rate can be reduced. .

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
The second transport unit is located downstream of the first transport unit in the transport direction,
The tape applicator located on the upstream side in the transport direction from the sealing and cutting device has a tape applicator step of attaching a tape member to the folded continuous sheet,
In the tape application process,
The path length of the transport path is changed by changing the transport path of the continuous sheet from the second transport unit to the tape applicator by the path changing unit,
It is desirable to adjust the position so that the tape application position on the continuous sheet becomes a normal position by the control for changing the path length.

  According to such a package manufacturing method, a tape member can be affixed to an appropriate position of a continuous sheet, and a package with good appearance can be manufactured.

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the sealing cutting step,
The rotating part of the sealing and cutting device having the rotating part and the sealing and cutting part provided in the rotating part rotates the sealing and cutting part intermittently to contact the continuous sheet, and Sealing and cutting the continuous sheet,
It is desirable to adjust the position so that the sealing cutting position on the continuous sheet becomes a normal position by controlling to change the phase of the rotating part.

  According to such a package manufacturing method, the appropriate position of the continuous sheet can be cut and sealed, and the defect rate can be reduced.

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
A tape applicator located on the upstream side of the sealing and cutting device and having a rotating part and a tape attaching part provided on the rotating part applies the tape member to the folded continuous sheet. A tape attaching process to attach,
In the tape application process,
When the rotating unit of the tape applying device rotates, the tape applying unit is intermittently brought into contact with the continuous sheet, and the tape member is applied.
It is desirable to adjust the position so that the tape application position on the continuous sheet becomes a normal position by controlling to change the phase of the rotating portion.

  According to such a package manufacturing method, a tape member can be affixed to an appropriate position of the continuous sheet, and a package having a good appearance can be manufactured.

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the transport step, the continuous sheet is transported in the transport direction by the first transport unit, the second transport unit, and the third transport unit located downstream of the transport unit in the transport direction,
In the sealing cutting step,
By controlling the third conveying unit without interlocking with the first conveying unit and the second conveying unit, the position adjustment is performed so that the sealing cutting position on the continuous sheet becomes a normal position. desirable.

  According to such a package manufacturing method, the appropriate position of the continuous sheet can be cut and sealed, and the defect rate can be reduced.

Such a package manufacturing method,
It is desirable that the third transport unit is located on the downstream side in the transport direction with respect to the folding unit that performs the folding process.

  According to such a package manufacturing method, the position adjusted by the third transport unit is not likely to be shifted due to folding of the continuous sheet, so that the appropriate position of the continuous sheet can be sealed and cut, and the defect rate is reduced. it can.

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the transport step, the continuous sheet is transported in the transport direction by the first transport unit, the second transport unit, and the third transport unit located downstream of the transport unit in the transport direction,
The tape applicator located on the upstream side in the transport direction from the sealing and cutting device has a tape applicator step of attaching a tape member to the folded continuous sheet,
In the tape application process,
By controlling the third conveying unit without interlocking with the first conveying unit and the second conveying unit, position adjustment is performed so that the tape attaching position on the continuous sheet becomes a normal position. desirable.

  According to such a package manufacturing method, a tape member can be affixed to an appropriate position of the continuous sheet, and a package having a good appearance can be manufactured.

Such a package manufacturing method,
In the sealing cutting step,
Acquiring deviation information of the display element by an imaging device,
Estimating the amount of deviation from the normal position of the sealing cutting position based on the obtained deviation information,
It is desirable to perform the position adjustment by executing the control according to the estimated deviation amount.

  According to such a package manufacturing method, it is possible to seal and cut the appropriate position of the continuous sheet from accurate deviation information by the imaging device, and to reduce the defect rate.

Such a package manufacturing method,
In the sealing cutting step,
Acquire the cumulative feed amount of the continuous sheet,
Estimating the amount of deviation from the normal position of the sealing cutting position based on the acquired cumulative feed amount,
It is desirable to perform the position adjustment by executing the control according to the estimated deviation amount.

  According to such a package manufacturing method, it is possible to manufacture a package having a good appearance without the above-described imaging device.

Such a package manufacturing method,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
It is desirable that the path length of the continuous sheet conveyance path from the folding section to the sealing cutting section is shorter than the path length of the continuous sheet conveyance path from the merge position to the folding section.

  According to such a package manufacturing method, the path length of the continuous sheet conveyance path from the folding part to the sealing cutting part is shorter than the path length of the continuous sheet conveyance path from the merge position to the folding part. In the line, it is possible to produce a package that has a good appearance.

A packaging body manufacturing apparatus for manufacturing a packaging body in which an absorbent article is packaged by a packaging sheet,
A first transport unit and a second transport unit that transport the continuous sheet in the transport direction, which is a material of the packaging sheet, and the display element is repeatedly formed in the continuous direction;
A joining device that sequentially joins the absorbent articles at a joining position located between the first transport unit and the second transport unit with respect to the continuous sheet being transported,
A folding part for folding the continuous sheet so as to wrap the merged absorbent article;
A cutting device that cuts the folded continuous sheet between adjacent absorbent articles to generate the package;
Based on the deviation information of the display element, by increasing or decreasing the first conveying speed at which the first conveying unit conveys the continuous sheet and the second conveying speed at which the second conveying unit conveys the continuous sheet, respectively. The conveyance control of the continuous sheet is performed so that the absorbent article joins the normal position of the continuous sheet,
In the transport control, transport is controlled so that the second transport speed is increased when the first transport speed is increased, and the second transport speed is decreased when the first transport speed is decreased. And a control unit.

  According to such a package manufacturing apparatus, it is possible to manufacture a package having a good appearance.

=== This Embodiment ===
The package manufacturing method and the package manufacturing apparatus 20 for absorbent articles according to the present embodiment are used in the manufacturing line LM for the package 7p of the sanitary napkin 1. That is, in this embodiment, based on the said manufacturing method, the package 7p of the sanitary napkin 1 as an absorbent article is manufactured. That is, in the manufacturing method according to the present embodiment (the package manufacturing apparatus 20 according to the present embodiment), the package 7p in which the sanitary napkin 1 is packaged by the packaging sheet 7 is manufactured.

  1A is a schematic plan view of the napkin 1, and FIG. 1B is a cross-sectional view taken along the line BB in FIG. 1A. 2A is a schematic perspective view of the napkin 1 arranged on the packaging sheet 7, FIG. 2B is a schematic plan view of a package 7p in which the napkin 1 is packaged by the packaging sheet 7, and FIG. FIG. 3B is a schematic plan view of the package 7p viewed from the opposite side of FIG. 2B.

  As shown in FIGS. 1A and 1B, the napkin 1 is excreted by being interposed between a liquid-permeable top sheet 2 such as a nonwoven fabric, a liquid-impermeable back sheet 4 such as a film, and the like. And an absorbent body 3 such as pulp fiber that absorbs matter. And these sheets 2 and 4 are larger than the absorber 3, and are mutually bonded in the part which protrudes from the absorber 3, Thereby, the absorber 3 is hold | maintained between these sheets 2 and 4 Yes.

  The planar shape of the napkin 1 is a substantially rectangular shape having a longitudinal direction and a width direction (hereinafter also referred to as a short direction). However, depending on the case, the napkin 1 may be disposed at a substantially central position in the longitudinal direction. It may have a pair of wings 1w, 1w protruding outward, in this example.

  When the napkin 1 is used, the wings 1w, 1w are folded back to the back sheet 4 side and are bonded and fixed to the underwear so as to sandwich the underwear in cooperation with the back sheet 4. Therefore, adhesives 5a and 5a are applied to the surfaces of the wing portions 1w and 1w that are to come into contact with the underwear when folded. Further, adhesives 5b and 5b for the same purpose are also applied to the surface of the back sheet 4 to be brought into contact with the underwear when the napkin 1 is used.

  For the purpose of protecting the adhesive strength of the adhesives 5a and 5b until the napkin 1 is used, as shown in FIGS. 1B and 2A, the application areas of the adhesives 5a and 5b described above cover these application areas. Protection sheets 6a and 6b are provided. Specifically, at the time before this use, the pair of wing portions 1w and 1w are folded on the top sheet 2 side, and a single protective sheet 6a is bridged over the wing portions 1w and 1w, Thereby, the adhesives 5a and 5a of the wing parts 1w and 1w are protected (FIG. 2A). On the other hand, a protective sheet 6b is also provided in the areas where the adhesives 5b and 5b of the back sheet 4 are applied so as to cover almost the entire surface thereof, thereby protecting the adhesives 5b and 5b (FIG. 1B).

  Further, before such use, as shown in FIGS. 2A and 2B, the napkin 1 is in the form of a package 7 p individually packaged by a packaging sheet 7. That is, first, as shown in FIG. 2A, the napkin 1 that is arranged on the substantially rectangular single-sheet packaging sheet 7 having a larger planar size than the napkin 1 while aligning the longitudinal direction of the packaging sheet 7. 2B, the short side portion 7S of the packaging sheet 7 is fixed to the packaging sheet 7 with the adhesive of the tape member 8, and in the three-fold state of FIG. 2B, In the pair of long side portions 7Lg and 7Lg of the packaging sheet 7, the portions of the packaging sheet 7 facing each other are welded to form sealing portions 7j and 7j.

  Moreover, in the above-mentioned mounting state, the protective sheet 6b of the napkin 1 may be bonded and fixed to the packaging sheet 7 at a plurality of positions. In this example, three positions (indeterminate) in the longitudinal direction of the packaging sheet 7 may be used. The protective sheet 6b of the napkin 1 is bonded to the packaging sheet 7 in the figure.

  Examples of the packaging sheet 7 include thermoplastic resin films such as polyethylene (PE) and polypropylene (PP), and nonwoven fabrics having thermoplastic resin fibers such as PE fibers and PP fibers.

  Moreover, as shown to FIG. 2C, the design G of the flower is printed on the packaging sheet 7 as an example of the design by the design use. Specifically, the design G has a plurality of flower illustrations IL, IL, etc., and the design G is formed by combining the illustrations IL, IL of the plurality of flowers. As a result, a flower pattern G is printed over substantially the entire surface of one side of the package 7p. Moreover, as a printing method of the pattern G, gravure printing, flexographic printing, inkjet printing, etc. can be illustrated.

FIG. 3 is a schematic plan view showing a process of generating the package 7p of the napkin 1.
As shown in FIG. 3, first, the packaging sheet 7 is conveyed in the conveyance direction in the form of a continuous sheet 7a along the conveyance direction (that is, the continuous sheet 7a is a material of the packaging sheet 7). And the napkin 1 conveyed along with a napkin conveyance pitch in the conveyance direction joins at the merge position Pj in the conveyance direction. And the napkin 1 conveyed along with a napkin conveyance pitch in the conveyance direction joins at the merge position Pj in the conveyance direction. At this time, the napkin 1 is in a completed state, that is, the wing portions 1w and 1w are folded as shown in FIG. 2A, and the protective sheets 6a and 6b are also attached. Further, as shown in FIG. 3, each napkin 1 is transported in a so-called lateral flow posture in which the width direction (short direction) of the napkin 1 faces the transport direction.

  At the merging position Pj, a plurality of napkins 1 and 1 are sequentially placed in the transport direction on the upper surface of one side of the continuous sheet 7a of the packaging sheet by the joining device 25 at the same position Pj. It is fixed to the continuous sheet 7a with an adhesive (not shown).

  Then, the continuous sheet 7a on which the napkin 1 is placed passes through the position of the folding device 61 (corresponding to the folding unit) in the transport direction, but the continuous sheet 7a is passed by the device 61 during the passage. Folded in the width direction. That is, one end 7ae1 and the other end 7ae2 in the width direction of the continuous sheet 7a are each folded inward in the width direction. At this time, the napkin 1 is also folded in three.

  Then, the continuous sheet 7a in the three-fold state passes through the position of the tape sticking device 71 in the transport direction, but when passing, the end portion that overlaps the top and bottom in the thickness direction by the device 71. Tape member 8 is stuck on continuous sheet 7a so that 7ae1 and 7ae2 may be straddled. The continuous sheet 7a is fixed in a three-fold state by the tape member 8.

  Then, the sealing portions 7j and 7j are formed on the continuous sheet 7a and cut to generate the package 7p of the napkin 1 from the continuous sheet 7a, but the sealing portions 7j and 7j may be formed and cut simultaneously. It can be done separately. In the present embodiment, as shown in FIG. 7, a sealing and cutting device 91 that simultaneously forms and cuts the sealing portions 7j and 7j is used. In this embodiment, when passing the position of the apparatus 91 in the conveyance direction, the apparatus 91 conveys the continuous sheet 7a between the napkins 1 and 1 adjacent to each other in the conveyance direction, as shown in FIG. This is a non-existing portion of the napkin 1 where the napkin 1 does not exist in the direction, and a heat welding process is performed on a predetermined sealing cutting position 7an on the continuous sheet 7a. And thereby, the part of the continuous sheet 7a which overlaps the upper and lower sides of thickness direction is joined and integrated by welding, and a pair of sealing parts 7j and 7j are formed along with a conveyance direction. Further, at this time, the continuous sheet 7a is cut back and forth in the conveying direction at the predetermined cutting position Pc between the pair of sealing portions 7j and 7j by the device 91, whereby the package 7p of the napkin 1 is obtained. Is generated.

  In the present embodiment, the path length of the conveyance path of the continuous sheet 7a from the folding apparatus 61 to the sealing cutting apparatus 91 is longer than the path length of the conveyance path of the continuous sheet 7a from the joining position Pj to the folding apparatus 61. Is shorter.

  FIG. 4 is a schematic side view of the production line LM for the package 7p of the napkin 1. FIG.

  The production line LM appropriately processes the napkin supply system L1 for supplying the napkin 1, the packaging sheet supply system L7a for supplying the continuous sheet 7a of the packaging sheet, and the continuous sheet 7a of the packaging sheet to which the napkin 1 is joined. And a processing system Lk that performs processing.

  Each system L1, L7a, Lk is provided with an appropriate transport device such as a belt conveyor or a transport roller. For example, a first transport device 41 (corresponding to a first transport unit), a second transport device 42 (corresponding to a second transport unit), and a third transport device 43 (corresponding to a third transport unit) described later correspond to this. To do. And these conveyance apparatuses are conveying conveyance objects, such as the continuous sheet 7a or the napkin 1, in a conveyance direction. Incidentally, as an example of the belt conveyor, a normal belt conveyor having an endless belt that circulates as a transport surface, a suction belt conveyor having an adsorption function on the outer peripheral surface of the endless belt, and the like can be given.

  In addition, in the production line LM, a CD direction (a direction penetrating the paper surface in FIG. 4) is set as the width direction of the line LM. In this example, the CD direction is in the horizontal direction, but the present invention is not limited to this. Further, in this example, a vertical vertical direction and a horizontal front-rear direction are set as two directions orthogonal to the CD direction, whereby the conveyance direction of the continuous sheet 7a of the packaging sheet 7 is a position in the conveyance direction, respectively. Accordingly, the direction is defined by both the vertical direction and the front-rear direction. The width direction of the continuous sheet 7a is parallel to the CD direction. Further, when a direction perpendicular to the CD direction and the conveyance direction is defined as the Z direction, the Z direction is parallel to the thickness direction of the continuous sheet 7a.

<<< Napkin supply system L1 >>>
The napkin supply system L1 (corresponding to the merging device) sequentially joins the napkin 1 at the merging position Pj located between the first conveying device 41 and the second conveying device 42 described later with respect to the continuous sheet 7a being conveyed. (Corresponding to the merging process). That is, the napkin supply system L1 (merging device) receives the completed napkin 1 transported from the upper process and transports it while changing the state of the napkin 1 to a state suitable for packaging; And a joining device 25 that is arranged at the joining position Pj and joins the napkin 1 to the continuous sheet 7a of the packaging sheet.

  The napkin state changing device 21 changes the direction and pitch of the napkin 1. First, the napkin 1 is fed from the upstream process in a state where the longitudinal direction of the napkin 1 faces the transport direction. Therefore, the apparatus 21 changes the conveyance form of the napkin 1 from a longitudinal flow to a lateral flow suitable for packaging. That is, by changing the direction of the napkin 1 by 90 °, the longitudinal direction of the napkin 1 is set in the CD direction. Then, the transport pitch of the napkin 1 is re-pitched to change to the napkin transport pitch.

  The joining device 25 receives the napkin 1 from the napkin state changing device 21 on the outer peripheral surface of the rotary drum 26 and holds it by suction or the like. Then, each napkin 1 is conveyed at the napkin conveyance pitch by driving and rotating the rotary drum 26, and each napkin 1 is pressed against the upper surface as one side of the continuous sheet 7a at the joining position Pj, so that the napkin 1 is applied to the continuous sheet 7a. Are bonded with an adhesive.

  Here, the driving and rotating operation of the rotating drum 26 is performed based on the synchronization signal. The synchronization signal is a signal obtained by repeatedly outputting unit signals, and each unit signal is a rotation angle signal composed of rotation angle values of 0 ° to 360 °. And in this joining apparatus 25, the conveyance operation | movement of a napkin conveyance pitch is matched as unit processing operation | movement. That is, the synchronization signal is transmitted to a servo motor (not shown) that is a driving source of the rotary drum 26, and is positioned so as to rotate by a rotation angle corresponding to the napkin conveyance pitch for each unit signal of the synchronization signal. It is controlled. Therefore, each time a unit signal is output, the rotary drum 26 transports the napkin 1 in the transport direction by the napkin transport pitch. Further, the tape applicator 71 and the sealing / cutting device 91, which will be described later, also have a patterned unit processing operation that should be repeated for each napkin 1, but the unit processing operation and the unit signal are paired by position control. Associated with one correspondence.

  The synchronization signal is generated by an appropriate control unit (not shown) such as a sequencer or a computer. That is, the control unit includes a processor and a memory, and a program for generating a synchronization signal is stored in advance in the memory. Then, the processor reads out the program from the memory and executes it, thereby repeatedly generating a unit signal of the synchronization signal. However, it is not limited to this. For example, the generation of the synchronization signal may be performed by an electric circuit. More specifically, the unit processing operation in which the synchronization signal is repeatedly performed on each napkin 1 by the other basic device is appropriately detected. It may be detected and generated by. For example, a rotary die cutter roll (not shown) for punching and generating the napkin 1 is provided with a rotary encoder (not shown) for detecting the rotation operation, and the encoder moves the napkin in conjunction with the rotation operation of the cutter roll. The unit signal may be output every time one is generated.

<<< Packaging sheet supply system L7a >>>
As shown in FIG. 4, the packaging sheet supply system L <b> 7 a includes a feeding device 31, a first transport device 41 located on the downstream side in the transport direction from the feed device 31, and a downstream side in the transport direction from the first transport device 41. And a second transport device 42 positioned.

  As for the continuous sheet 7a, a pattern G printed in advance at a predetermined printing pitch in a continuous direction at another factory or the like is carried into the production line LM as a form of a material coil 7ac wound in the continuous direction. . Here, when the pattern G is printed at a predetermined printing pitch, the printing pitch shifts when it is wound around the material coil 7ac, and the continuous sheet 7a fed by the feeding device 31 is schematically shown in FIG. As shown in the plan view, the pattern G is printed in a continuous direction at a printing pitch P12, P23...

  Since the continuous sheet 7a fed out by the feeding device 31 has a pattern G that is not constant with the printing pitches P12, P23,..., The first conveying device 41 and the second conveying device 42 have the napkin 1 as the regular pattern G of the continuous sheet 7a. Adjust so that it is in position (joins). And in this joining position Pj, the napkin 1 is arrange | positioned and joined to the continuous sheet 7a by the joining apparatus 25. FIG.

Hereinafter, each apparatus 31,41,42 which concerns on the packaging sheet supply system L7a is demonstrated.
(1) Feeding device 31
As shown in FIG. 4, the feeding device 31 is for feeding the continuous sheet 7a from the material coil 7ac, and serves as a rotation shaft portion 31a along the CD direction and a drive source for driving and rotating the rotation shaft portion 31a. A servomotor (not shown), and a tension controller 35 that adjusts the tension of the continuous sheet 7a that is fed out and conveyed from the rotary shaft portion 31a. The rotation shaft portion 31a is driven and rotated in a state where the rotation shaft portion 31a is inserted into the through-hole of the material coil 7ac in the center and the material coil 7ac is supported by the rotation shaft portion 31a. The continuous sheet 7a is fed out from the coil 7ac.

(2) First transport device 41, second transport device 42
The first transport device 41 and the second transport device 42 cooperate to transport the continuous sheet 7a in the transport direction (corresponding to a transport process).

  As shown in FIG. 4, the first transport device 41 includes a roll 41r that rotates around a rotation axis along the CD direction, and a servo motor (not shown) as a drive source that drives and rotates the roll 41r. .

  About the 2nd conveying apparatus 42, the endless belt 42b is wound around a pair of rolls 42r and 42r arrange | positioned at intervals before and behind in the conveyance direction. And at least one roll 42r of these pair of rolls 42r, 42r has a servo motor (not shown) as a drive source for driving and rotating. Therefore, as shown in FIG. 4, the endless belt 42b circulates in a substantially oval track that is long in the transport direction. A plurality of intake holes (not shown) are formed in the belt surface 42s of the endless belt 42b. Then, suction force is generated on the belt surface 42s by the intake air from these intake holes. Therefore, the endless belt 42b moves while sucking and holding the lower surface of the continuous sheet 7a on the belt surface 42s, whereby the continuous sheet 7a is conveyed from the upstream side to the downstream side in the conveyance direction.

  Further, the joining position Pj of the napkin 1 is located between the first transport device 41 and the second transport device 42. In the present embodiment, the first transport device 41 corresponds to the closest transport unit upstream from the joining position Pj in the transport direction. The second transfer device 42 corresponds to the closest transfer unit on the downstream side in the transfer direction from the merge position Pj, and is located between the merge position Pj and the folding device 61.

  The 1st conveying apparatus 41 and the 2nd conveying apparatus 42 send out the continuous sheet 7a in response. At the time of feeding, the first conveying device 41 conveys the continuous sheet 7a and the second conveying device 42 so that the napkin 1 is placed (joined) at the normal position of the symbol G on the continuous sheet 7a. Increases or decreases the second conveyance speed for conveying the continuous sheet 7a. That is, by increasing or decreasing the first conveyance speed and the second conveyance speed, respectively, based on deviation information of a register mark M (described later, which is repeatedly formed in the continuous direction in the continuous sheet 7a), The conveyance control of the continuous sheet 7a is performed so that the napkin 1 joins the normal position of the continuous sheet 7a. Then, the feeding speed of the continuous sheet 7a is adjusted so that the normal position of the symbol G on the continuous sheet 7a is located at the merge position Pj at the timing when the napkin 1 is arranged at the merge position Pj by the above-described synchronization signal. Is done. As a result, at the joining position Pj, as shown in FIG. 5, each napkin 1 is placed and joined to the normal position corresponding to each symbol G of the continuous sheet 7a.

  Conventionally, as a measure for joining (loading) the napkin to the regular position, a measure for positively extending the continuous sheet has been adopted. That is, as an alignment method for placing the napkin at the normal position when the printing pitch fluctuates, by adjusting the elongation of the continuous sheet for each printing pitch of the continuous sheet (elongation adjustment is the same as in this embodiment, The position is adjusted so that the napkin joins the normal position of the continuous sheet. However, in such a case, the following problems may occur.

  That is, when the conveyance adjustment of the continuous sheet is performed for each print pitch, the degree of elongation of the continuous sheet portion corresponding to a certain print pitch (referred to as the first print pitch) and the next print pitch (second print pitch and The degree of elongation of the portion of the continuous sheet corresponding to (call) is different. For example, the elongation of the portion of the continuous sheet corresponding to the first printing pitch increases, whereas the elongation of the portion of the continuous sheet corresponding to the adjacent second printing pitch occurs. In such an extended state, these parts are released when they pass through the two conveying devices. At this time, the part with the large extension and the part with the small part interact (that is, the large part). Pulling a small portion), flapping of the continuous sheet may occur at the boundary between these portions. And if the said fluttering generate | occur | produces, it cannot fold neatly in a folding process, and a package body will become a bad-looking thing as a whole.

  On the other hand, in the present embodiment, control is performed such that when the first transport speed is increased, the second transport speed is increased, and when the first transport speed is decreased, the second transport speed is decreased. . That is, the napkin 1 is merged (placed) at the normal position without causing the continuous sheet 7a to extend as much as possible between the first conveying device 41 and the second conveying device 42. Therefore, a good-looking package can be manufactured.

  Further, in the present embodiment, control is performed to maintain a constant ratio between the first transport speed and the second transport speed. According to such a conveyance control, a different extension is not generated in the continuous sheet 7a between the first conveyance device 41 and the second conveyance device 42 as a control purpose (elongation of the first printing pitch and the second printing pitch). Control is performed by the first transport device 41 and the second transport device 42 so that the napkin 1 is joined (placed) to the normal position so that the degree is the same. Therefore, it is possible to manufacture a package having a better appearance.

  In particular, in the present embodiment, control is performed to match the magnitudes of the first transport speed and the second transport speed. That is, as the control purpose, the control is performed to join the napkin 1 to the normal position so as not to cause the continuous sheet 7a to extend between the first transport device 41 and the second transport device 42. It is possible to prevent flapping. Therefore, it is possible to manufacture a package having a better appearance.

  Then, the adjustment of the conveyance speed to the regular position is specifically realized by using an imaging device 47 such as a CCD camera and a control unit 48 such as a computer (corresponding to the conveyance control unit) shown in FIG. This is done as follows.

  First, as shown in FIG. 5, a substantially rectangular register mark M (corresponding to a display element) is printed on the continuous sheet 7a in advance in another factory or the like so as to correspond to each pattern G. The register mark M is also shifted at the printing pitches P12, P23,..., Just like the pattern G is shifted at the printing pitches P12, P23,. In addition, as illustrated in FIG. 4, the imaging device 47 images the continuous sheet 7a at the upstream position P47 in the conveyance direction of the first conveyance device 41 (hereinafter, also referred to as an imaging position P47) in this embodiment. The image data 7a is generated. Here, the imaging device 47 receives the above-described synchronization signal. Therefore, the imaging operation is performed every time the rotation angle value of the synchronization signal matches the specified rotation angle value recorded in advance in the memory of the imaging device 47.

  If it does so, the control part 48 will acquire the information of the deviation | shift amount of the position of the register mark M on the continuous sheet 7a, and a reference position by analyzing the image data transmitted from the imaging device 47 by binarization processing etc. To do. Here, the reference position is based on a predetermined printing pitch in which the pattern G is printed in the continuous direction in another factory or the like in advance on the continuous sheet 7a described above, and a deviation occurs when the material coil 7ac is wound. This is the position where the above-mentioned register mark M should originally be located based on the napkin conveyance pitch when the state is not present. In this example, information on the reference position on the image data is recorded in advance in the memory of the control unit 48. Therefore, for example, the position of the register mark M on the image data is acquired by binarization processing or the like, and the amount of deviation between this position and the reference position on the image data is calculated, and this is calculated as the position of the position. Information on the amount of deviation.

  Then, based on the information on the deviation amount, the first conveyance device 41 and the second conveyance device 42 set the first conveyance speed and the second conveyance speed of the continuous sheet 7a so that the deviation amount disappears at the joining position Pj. Adjust (adjust as the first transport speed and the second transport speed coincide with each other as described above). For example, when the information on the shift amount indicates that “the register mark M is located downstream of the reference position in the transport direction”, the control unit 48 is connected to the first transport device 41. While each of the second transport devices 42 decreases the first transport speed and the second transport speed from the current value by an adjustment amount obtained by multiplying the deviation amount by a predetermined gain, “the register mark M is transported more than the reference position in the transport direction. In the case of "it is located upstream of", the first transport speed and the second transport speed are increased from the current values by an adjustment amount obtained by multiplying the deviation amount by a predetermined gain.

Moreover, as shown in FIG. 4, in this embodiment, the adhesive agent application apparatus 51 has apply | coated the adhesive for joining the napkin 1 to the continuous sheet 7a toward the continuous sheet 7a. And the application | coating of this adhesive agent is made | formed intermittently for every unit signal based on the above-mentioned synchronizing signal, and timing is adjusted with the said deviation | shift amount. Therefore, it is possible to accurately apply the adhesive to each position where each napkin 1 is to be disposed in the continuous sheet 7a.
<<< About Processing System Lk >>>
As shown in FIG. 4, in the processing system Lk, the continuous sheet 7a of the packaging sheet to which the napkin 1 is joined is conveyed in the conveyance direction. The conveyance of the continuous sheet 7a is performed by the first conveyance device 41 and In addition to the second transfer device 42, the process is also executed by a third transfer device 43 provided in the processing system Lk. In the present embodiment, the transport speed of the third transport device 43 is controlled to match the first transport speed and the second transport speed.

  The processing system Lk has a folding device 61, a tape attaching device 71, and a sealing and cutting device 91 (corresponding to a cutting device), and are arranged in this order in the transport direction.

  The folding device 61 folds the continuous sheet 7a so as to wrap the joined napkin 1 (corresponding to a folding step). The tape applicator 71 is positioned on the upstream side of the sealing and cutting device 91 in the transport direction, and applies the tape member 8 to the folded continuous sheet 7a (corresponding to a tape applicator step). The sealing and cutting device 91 cuts and seals the folded continuous sheet 7a between the adjacent napkins 1 and 1 (corresponding to a cutting step and a sealing cutting step). The tape applicator 71 and the sealing / cutting device 91 are basically driven based on a synchronization signal.

  Hereinafter, each of the devices 61, 71, 91 will be described.

(1) Folding device 61
The folding device 61 has folding members (not shown) such as appropriate plate members and roller members on both sides in the CD direction. 3 and 4, when the continuous sheet 7a of the packaging sheet to which the napkin 1 is bonded passes through the position of the bending member, the folding member abuts against the continuous sheet 7a, whereby the napkin 1 And both end portions 7ae1 and 7ae2 in the width direction of the continuous sheet 7a are bent inward in the width direction. And thereby, the continuous sheet 7a is made into a trifold state with the napkin 1. FIG.

(2) Tape applicator 71
FIG. 6 is a schematic side view of the tape applicator 71.
The tape applicator 71 includes a rotating drum 72 (corresponding to a rotating portion) that can rotate around a rotation axis along the CD direction with the outer peripheral surface 72s facing the conveyance path of the three-fold continuous sheet 7a, and a rotating drum. And a servo motor (not shown) as a drive source for driving and rotating 72. An adsorption force is generated on the outer peripheral surface 72s of the rotating drum 72 by intake air or the like. As a result, a plurality of tape members 8 and 8 are formed on the outer peripheral surface 72s at a tape member transport pitch in the rotation direction Dc72. Are held side by side (the holding portion where the tape member 8 is held corresponds to the tape attaching portion). When each tape member 8 is sent to a facing position P7a (corresponding to a tape attaching position) facing the continuous sheet 7a in the tri-fold state by the rotation of the rotating drum 72 and passes through the same position P7a, each tape member Each tape member 8 adheres to the continuous sheet 7a based on the adhesive of No. 8, and thereby the tape member 8 is delivered from the outer peripheral surface 72s of the rotating drum 72 to the continuous sheet 7a. That is, when the rotating drum 72 rotates, the holding portion is intermittently brought into contact with the continuous sheet 7a, and the tape member 8 is attached.

  The rotating operation of the rotating drum 72 is basically performed based on the synchronization signal. That is, the position of the servo motor of the rotary drum 72 is controlled so that the position where the tape member 8 is sucked and held on the outer peripheral surface 72s becomes the command position in the rotation direction Dc72 indicated by the synchronization signal. Thus, basically, every time a unit signal of the synchronization signal is output, the tape member 8 arranged at the tape member conveyance pitch on the outer peripheral surface 72s is conveyed in the rotation direction Dc72 by the rotation angle of the unit processing operation. To do.

  By the way, as described above, the continuous sheet 7a is transported so that the napkin 1 joins the normal position of the continuous sheet 7a (under control of joining the normal sheet 7a) and the first transport device 41 of the packaging sheet supply system L7a and The second conveying device 42 is used. Since the continuous sheet 7a is connected from the packaging sheet supply system L7a to the processing system Lk, the conveyance of the continuous sheet 7a in the processing system Lk is also based on this control (the influence of such control). receive). Therefore, if the tape member 8 arranged at the tape member conveyance pitch on the outer peripheral surface 72s of the rotary drum 72 is conveyed in the rotation direction Dc72 by the rotation angle of the tape member conveyance pitch based on the synchronization signal, the continuous sheet 7a Even if it is intended to adhere to the upper regular position, the tape member 8 may be displaced from the regular position.

  For this reason, in the present embodiment, position adjustment is performed so that the tape application position on the continuous sheet 7a becomes the normal position by the control of changing the phase of the rotary drum 72. By such position adjustment, the tape member 8 can be affixed to an appropriate position of the continuous sheet 7a, and a packaging body 7p having a good appearance can be manufactured.

  Information on the amount of deviation of the position in the transport direction from the reference position, which is the position where the register mark M of the folded continuous sheet 7a should originally be, is acquired, and based on the information on the amount of deviation of the position, the rotating drum 72 The timing at which the tape member 8 is sent to the facing position P7a is shifted from the timing indicated by the synchronization signal. In addition, the realization of such a timing shifting process is performed using an imaging device 81 such as a CCD camera and a control unit 82 such as a computer (FIG. 4), as in the case of the above-described packaging sheet supply system L7a. This is done as follows.

  As shown in FIG. 5, the register mark M is printed on the continuous sheet 7 a at the aforementioned print pitches P <b> 12, P <b> 23, and the image pickup device 81 includes a folding device 61 and a rotating drum 72 of the tape sticking device 71. The continuous sheet 7a is imaged in the meantime to generate image data of the continuous sheet 7a. Here, the imaging device 81 receives a synchronization signal. Therefore, the imaging operation is performed each time the rotation angle value of the synchronization signal matches the specified rotation angle value recorded in advance in the memory of the imaging device 81.

  If it does so, the control part 82 will analyze the image data transmitted from the imaging device 81 by a binarization process etc., and the position of the register mark M from the reference position on the continuous sheet 7a based on a tape member conveyance pitch will be described. Information on the amount of deviation is acquired, and information on the amount of deviation of the position is calculated as described above.

  Then, the command position in the rotation direction Dc72 indicated by the synchronization signal is corrected based on the information on the displacement amount of the position. For example, when the information on the deviation amount indicates that “the register mark M is located downstream of the reference position in the transport direction”, the control unit 82 multiplies the deviation amount by a predetermined gain. When the above-mentioned command position is increased by the adjusted amount, while “register mark M is located upstream in the transport direction from the reference position” is indicated, adjustment is performed by multiplying the deviation amount by a predetermined gain. Decrease the command position by the amount. That is, by acquiring the shift information of the display element by the imaging device 81, estimating the shift amount from the normal position based on the acquired shift information, and executing the control according to the estimated shift amount. The position adjustment is performed.

(3) Seal cutting device 91
FIG. 7 is a schematic side view of the sealing / cutting device 91. In FIG. 7, a partially enlarged view of the device 91 is also shown.
As described above, the sealing and cutting device 91 includes the napkin 1 between the napkins 1 and 1 adjacent to each other in the conveying direction in the three-fold continuous sheet 7a, that is, the napkin 1 in which the napkin 1 does not exist in the continuous sheet 7a. A pair of sealing portions 7j and 7j are formed by thermal welding at a predetermined sealing cutting position 7an that is a non-existing portion of the sheet, and the continuous sheet 7a is cut at a position between the pair of sealing portions 7j and 7j. Thus, the package 7p of the napkin 1 is generated.

  The apparatus 91 includes a pair of upper and lower rolls 91u and 91d that can rotate around a rotation axis along the CD direction, and a servo motor (not shown) as a drive source that drives and rotates the pair of rolls 91u and 91d. Have.

  On the outer peripheral surface of the upper roll 91u (corresponding to the rotating portion), a pair of convex portions 91up, 91up (corresponding to the sealing cutting portion) corresponding to the shape of the pair of sealing portions 7j, 7j is provided in the rotation direction Dc91. Cutter blades 91uc (corresponding to sealing cutting portions) are provided at a position between the pair of convex portions 91up and 91up. On the other hand, the shape of the outer peripheral surface of the lower roll 91d is a shape capable of receiving the pair of convex portions 91up and 91up and the cutter blade 91uc. In the present embodiment, the pair of convex portions 91up and 91up, 91up and the cutter blade 91uc are in a shape having a pair of receiving convex portions 91dp, 91dp and a receiving blade 91dc, respectively, at the positions where they face each other. Basically, the rotation operations of the rolls 91u and 91d are also performed based on the above-described synchronization signal. That is, basically, the servo motor is position-controlled so that the positions of the pair of convex portions 91up and 91up and the cutter blade 91uc become the command position in the rotation direction Dc91 indicated by the synchronization signal. Thus, each time the unit signal of the synchronization signal is output, the pair of convex portions 91up and 91up and the cutter blade 91uc face the sealing cutting position 7an that is the non-existing portion of the napkin 1 in the continuous sheet 7a. As a result, the package 7p of the napkin 1 is generated. That is, when the upper roll 91u rotates, the convex portions 91up and 91up and the cutter blade 91uc are intermittently brought into contact with the continuous sheet 7a, and the continuous sheet 7a is sealed and cut.

  However, as in the case of the tape applicator 71 described above, even if the sealing / cutting device 91 is controlled by the synchronization signal, the pair of sealing portions 7j and 7j are correctly formed at the normal position of the sealing / cutting position 7an. Thus, it is difficult to cut at a position between the pair of sealing portions 7j and 7j. Therefore, in the present embodiment, as in the case of the tape sticking device 71, information on the amount of positional deviation from the reference position, which is the position where the register mark M of the continuous sheet 7a should be originally located, is acquired, and this positional deviation is obtained. Based on the quantity information, the timing for forming the sealing portions 7j and 7j and the timing for cutting the continuous sheet 7a are shifted from the timing indicated by the synchronization signal. Details are as follows.

  In the present embodiment, the position adjustment is performed by controlling the phase of the upper roll 91u (and the lower roll 91d) so that the sealing cutting position 7an on the continuous sheet 7a becomes a normal position. Therefore, the proper position of the continuous sheet 7a can be sealed and cut, and the defect rate can be reduced. The same information as that used in the above-described tape applicator 71 is also used as the positional deviation information, and the control unit 82 (FIG. 4) uses the upper roll 91u (and the lower roll 91d). The position control of the rotational operation is performed based on information on the amount of displacement of the position. That is, the command position in the rotation direction Dc91 indicated by the synchronization signal is corrected based on information on the amount of deviation of the position. More specifically, when the information on the deviation amount indicates that “the register mark M is located downstream of the reference position in the transport direction”, the control unit 82 sets the deviation amount to a predetermined amount. If the command position is increased by the adjustment amount multiplied by the gain, while “register mark M is located upstream of the reference position in the transport direction”, the deviation amount is set to a predetermined gain. The command position is reduced by the adjustment amount multiplied by. And thereby, it becomes possible to form a pair of sealing parts 7j and 7j correctly in the regular position of the sealing cutting position 7an, and to cut | disconnect in the position between a pair of sealing parts 7j and 7j. . That is, the shift information of the register mark M is acquired by the imaging device 81, the shift amount from the normal position of the sealing cutting position 7an is estimated based on the acquired shift information, and the shift amount is estimated according to the estimated shift amount. The position adjustment is performed by executing the control.

=== First Modification ===
FIG. 8 is a schematic side view of the production line LM of the first modified example.

  The main difference from this embodiment (FIG. 4) is that, as shown in FIG. 8, (1) the path changing unit 101 is arranged between the imaging device 81 and the tape attaching device 71, (2) There are two points that the command of the control unit 82 such as a computer is not the tape sticking device 71 and the sealing / cutting device 91 but the route changing unit 101. The rest of the configuration is generally the same as in the above-described embodiment. Therefore, in the following, this difference will be mainly described, the same reference numerals are given to the same configurations, and the description thereof will be omitted.

  The path changing unit 101 includes a pair of fixed rolls 102, 102, a movable roll 103 positioned therebetween, a measuring instrument (not shown), and an actuator (not shown).

  The pair of fixed rolls 102 and 102 rotate around the rotation axis along the CD direction. The movable roll 103 moves in a predetermined direction (vertical direction in FIG. 8) and rotates around a rotation axis along the CD direction. The measuring instrument is an encoder or the like, detects the position in the predetermined direction, and outputs position information. The actuator moves the movable roll 103 in a predetermined direction.

  The three-folded continuous sheet 7a is wound around so that one side in the thickness direction is in contact with the fixed rolls 102 and 102, and the other side in the thickness direction is in contact with the movable roll 103. A loop of the sheet 7a is formed. And the magnitude | size of a loop is adjusted when the movable roll 103 moves to a predetermined direction, As a result, a conveyance path | route length is adjusted.

  As described above, even if the tape applying device 71 and the sealing / cutting device 91 are simply controlled by the synchronization signal, it is difficult to apply the tape member 8 to the regular position and to perform the sealing / cutting. Therefore, in the first modification example, as described above, information on the amount of positional deviation from the reference position, which is the position where the register mark M of the continuous sheet 7a should be originally located, is acquired, and based on the information on the amount of deviation of this position. By adjusting the transport path length, the continuous sheet 7a is affixed with tape and sealed and cut at the normal position. Details are as follows.

  In the first modified example, the path length of the transport path is changed by changing the transport path of the continuous sheet 7a from the second transport apparatus 42 to the sealing cutting apparatus 91 by the path changing unit 101, and the path length is changed. By the control to be changed, the position adjustment is performed so that the sealing cutting position 7an on the continuous sheet 7a becomes the normal position. The same information as described above is also used as the positional deviation information, and the control unit 82 controls the position of the movable roll 103 based on the positional deviation information. 103 is moved by an actuator (not shown) that moves a position in a predetermined direction, and the conveyance path length is adjusted so that the deviation amount is eliminated. More specifically, when the information on the deviation amount indicates that “the register mark M is located downstream of the reference position in the transport direction”, the control unit 82 sets the deviation amount to a predetermined gain. When the movable roll 103 is moved by the adjustment amount multiplied by 1 to increase the transport path length from the current value, it indicates that “the register mark M is located upstream of the reference position in the transport direction”. In other words, the movable roll 103 is moved by an adjustment amount obtained by multiplying the deviation amount by a predetermined gain to reduce the transport path length. Thus, the tape member 8 can be attached and sealed and cut at the regular position of the continuous sheet 7a.

  That is, the tape member 8 can be affixed to an appropriate position of the continuous sheet 7a, and the packaging body 7p having a good appearance can be manufactured. Moreover, the proper position of the continuous sheet 7a can be cut and sealed, and the defect rate can be reduced.

  Further, the path changing unit 101 is located downstream of the folding device 61 that performs the folding process so that the position adjusted by the path changing unit 101 is not shifted due to folding of the continuous sheet 7a. Is desirable.

=== Second Modification ===
FIG. 9 is a schematic side view of the production line LM of the second modified example.

  As shown in FIG. 9, the main differences from this embodiment (FIG. 4) are as follows. (1) The third transport device 43 is controlled so that the second transport device 42 has the same transport speed. (2) The command of the control unit 82 such as a computer is not the tape sticking device 71 and the sealing / cutting device 91 but the third transport device 43. The third transport device 43 includes an endless belt 43b, a belt surface 43s, a pair of rolls 43r and 43r disposed at intervals in the front and rear in the transport direction, and at least one of the pair of rolls 43r and 43r. And a servo motor (not shown) as a drive source that is driven and rotated. Further, the third conveying device 43 conveys the continuous sheet 7 a by the same method as the second conveying device 42. Therefore, in the following, this difference will be mainly described, the same reference numerals are given to the same configurations, and the description thereof will be omitted.

  As described above, even if the tape attaching device 71 and the sealing / cutting device 91 are simply controlled by the synchronization signal, it is difficult to attach the tape member 8 to the regular position and to perform the sealing / cutting. Therefore, in the second modified example, as described above, information on the amount of positional deviation from the reference position, which is the position where the register mark M of the continuous sheet 7a should be originally located, is obtained, and based on the information on the amount of deviation of this position. By adjusting the third conveying speed of the third conveying device 43 that is not interlocked with the second conveying device 42, the continuous sheet 7a is affixed with tape or cut at a regular position. Details are as follows.

  In the second modified example, the sealing cutting position 7an on the continuous sheet 7a becomes the normal position by controlling the third conveying device 43 without interlocking with the first conveying device 41 and the second conveying device 42. Adjust the position as follows. Then, the same information as that used above is also used as the information on the amount of deviation of the position, and the control unit 82 controls the third conveyance so that the amount of deviation is eliminated based on the information on the amount of deviation. Adjust the speed. More specifically, when the information on the deviation amount indicates that “the register mark M is located downstream of the reference position in the transport direction”, the control unit 82 sets the deviation amount to a predetermined gain. While the third conveyance speed is decreased by the adjustment amount multiplied by, while it indicates that “the register mark M is located upstream in the conveyance direction from the reference position”, the deviation amount is multiplied by a predetermined gain. The third transport speed is increased by the adjusted amount. Thus, the tape member 8 can be attached and sealed and cut at the regular position of the continuous sheet 7a.

  That is, the tape member 8 can be affixed to an appropriate position of the continuous sheet 7a, and the packaging body 7p having a good appearance can be manufactured. Moreover, the proper position of the continuous sheet 7a can be cut and sealed, and the defect rate can be reduced.

  Further, the third transport device 43 is located downstream of the folding device 61 that performs the folding process so that the position adjusted by the third transport device 43 is not shifted due to folding of the continuous sheet 7a. It is desirable.

=== Third Modification ===
The main difference from this embodiment (FIG. 4) is that (1) the imaging device 81 is not provided. The rest of the configuration is generally the same as in the above-described embodiment. Therefore, in the following, this difference will be mainly described, the same reference numerals are given to the same configurations, and the description thereof will be omitted.

  As described above, even if the tape attaching device 71 and the sealing / cutting device 91 are simply controlled by the synchronization signal, it is difficult to attach the tape member 8 to the regular position and to perform the sealing / cutting. Therefore, in the third modified example, the continuous sheet 7a from the second conveying device sending position P42, which is the position where the second conveying device 42 sends the continuous sheet 7a downstream in the conveying direction, to the sealing cutting device 91 is sent. Information on the length deviation between the cumulative length (corresponding to the cumulative feed amount) and the length of the transport path on the production line from the second transport device delivery position P42 to the sealing cutting device 91, Based on the information on the amount of deviation in length, the position of tape affixing or sealing cutting on the continuous sheet 7a is determined as the normal position by controlling the phase of the rotating drum 72 or the upper roll 91u (and the lower roll 91d). Adjust the position so that That is, the cumulative feed amount of the continuous sheet 7a is acquired, the shift amount from the normal position of the sealing cutting position 7an is estimated based on the acquired cumulative feed amount, and the control is performed according to the estimated shift amount. The position adjustment is performed by executing. Details are as follows.

  The conveyance of the continuous sheet 7a is to increase or decrease the first conveyance speed and the second conveyance speed so that the napkin 1 merges with the regular position of the continuous sheet 7a at a certain timing when the napkin 1 is arranged at the merge position Pj. It is controlled by. That is, in the conveyance of the continuous sheet 7a, the conveyance speed is increased or decreased at a constant timing. In other words, the conveyance of the continuous sheet 7a is performed by increasing / decreasing the feeding length of the first conveying device 41 (integrated value of the first conveying speed) and the feeding length of the second conveying device 42 (integrated value of the second conveying speed). It can be said that it is controlled by. That is, the cumulative feed amount described above can be acquired by accumulating the feed length of the second transport device 42 for each control performed at the above-described fixed timing. Specifically, the cumulative feed amount is the cumulative length sent by the second transport device 42 from the second transport device delivery position P42 to the sealed cutting position 7an on the continuous sheet 7a where the sealing and cutting process is performed. .

  And the control part 82 is the path length of the conveyance path | route on the manufacturing line from the 2nd conveyance apparatus sending position P42 currently recorded on the memory | storage of the control part 82 to the sealing cutting apparatus 91, and this cumulative feed amount, The amount of deviation is calculated.

  Then, based on the information on the amount of deviation, position control of the rotational operation of the rotary drum 72 and the upper roll 91u (and the lower roll 91d) is performed. That is, the command position in the rotation direction Dc72 or Dc91 indicated by the synchronization signal is corrected based on the information on the shift amount of the position. More specifically, when the information on the deviation amount indicates that “the accumulated feed amount is shorter than the transport path length on the production line”, the control unit 82 multiplies the deviation amount by a predetermined gain. If the command position is increased by the adjustment amount, while the cumulative feed amount is longer than the transport path length on the production line, the above-mentioned command position is increased by the adjustment amount obtained by multiplying the deviation amount by a predetermined gain. The command position is reduced. Thus, the tape member 8 can be attached and sealed and cut at the regular position of the continuous sheet 7a.

  That is, the tape member 8 can be affixed to an appropriate position of the continuous sheet 7a, and the packaging body 7p having a good appearance can be manufactured. Moreover, the proper position of the continuous sheet 7a can be cut and sealed, and the defect rate can be reduced.

  Further, according to such a package manufacturing method, it is possible to manufacture a package 7p having a good appearance without the imaging device 81.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, as shown in FIG. 5, the register mark M is printed on the continuous sheet 7 a in addition to the design pattern G. The register mark M corresponds to a “display element”. However, it is not limited to this. That is, the symbol G may be used in place of the register mark M.

  In the above-described embodiment, the register mark M as the display element in FIG. 5 is formed by printing on the continuous sheet 7a, but the formation of the display element is not limited to printing. For example, the display element may be formed by pressing the continuous sheet 7a in the thickness direction to form a plurality of dot-shaped recesses or a plurality of linear recesses.

  In the above-described embodiment, the sanitary napkin 1 of FIG. 1A is illustrated as an example of the absorbent article, but the present invention is not limited to this as long as it absorbs the excrement of the wearer. For example, a disposable diaper or a urine collecting pad may be used.

  In the above-described embodiment, as illustrated in FIG. 4, the first transport device 41 includes the roll 41r, but the present invention is not limited to this. For example, the 1st conveying apparatus 41 may be comprised with the belt conveyor, respectively. That is, for example, instead of the roll 41r, a configuration having a pair of rolls and an endless belt wound around the pair of rolls is used, and one side of the continuous sheet 7a is applied to the outer peripheral surface of the endless belt. The sheet 7a may be conveyed in contact therewith.

  In the above-described embodiment, the information on the shift amount of the register mark M is acquired using the imaging device 47 and the control unit 48 of FIG. 4. As a specific example of an apparatus that can acquire such information, An image sensor CV-5000 (manufactured by Keyence Corporation) can be mentioned. However, it is not limited to this.

  In the above-described embodiment, the same control method is used for controlling the positions of the tape applicator 71 and the sealing / cutting device 91, but the present invention is not limited to this. Each device may be controlled using a different method (for example, the tape applying device 71 is controlled by the path changing unit 101, and the sealing and cutting device 91 is controlled by the phase of the rotating unit).

  In the above-described embodiment, the sealing cutting process is used, but the present invention is not limited to this. Two separate processes of a sealing process and a cutting process may be sufficient.

1 sanitary napkin (absorbent article), 1w wing part,
2 Top sheet, 3 Absorber, 4 Back sheet,
5a adhesive, 5b adhesive, 6a protective sheet, 6b protective sheet,
7 Packaging sheet, 7Lg long side, 7S short side,
7a Continuous sheet of packaging sheet,
7ac material coil, 7ae1 end, 7ae2 end,
7an sealing cutting position on continuous sheet, 7j sealing part,
7p package,
8 Tape material,
20 packaging body manufacturing device 21 napkin state changing device (direction changing device, pitch changing device),
25 joining device, 26 rotating drum,
31 feeding device, 31a rotating shaft, 35 tension controller,
41 1st conveying apparatus 41r roll, 42 2nd conveying apparatus, 42r roll,
42b endless belt, 42s belt surface 43 third conveying device, 43r roll, 43b endless belt, 43s belt surface 47 imaging device, 48 control unit,
51 adhesive applicator,
61 Folding device, 62 Standing guide member, 63 Folding guide portion 64 Movement restriction guide member 71 Tape sticking device, 72 Rotating drum, 72s Outer peripheral surface 81 Imaging device, 82 Control unit 91 Sealing and cutting device, 91u Upper roll, 91uc cutter Blade, 91up convex part,
91d lower roll, 91dp convex part, 91dc receiving blade,
101 route changing unit, 102 fixed roll, 103 movable roll,
LM production line,
L1 napkin supply system, L7a packaging sheet supply system, Lk processing system,
Lb fold line,
G design, IL illustration, M register mark (display element)
Pj merging position, P7a tape attaching position, P42 second transport device delivery position Pc cutting position, P47 imaging position,
P12 printing pitch, P23 printing pitch, P34 printing pitch,
Dc72 rotation direction, DC91 rotation direction

Claims (15)

A package manufacturing method for manufacturing a package in which an absorbent article is packaged by a packaging sheet,
A conveying step of conveying the continuous sheet that is a material of the packaging sheet and the display element is repeatedly formed in the continuous direction in the conveying direction by the first conveying unit and the second conveying unit;
For the continuous sheet being conveyed, a merging step of sequentially merging the absorbent article at a merging position located between the first conveying unit and the second conveying unit;
A folding step of folding the continuous sheet so as to wrap the merged absorbent article;
Cutting the folded continuous sheet between the adjacent absorbent articles to produce the package, and
In the transport process,
Based on the deviation information of the display element, by increasing or decreasing the first conveying speed at which the first conveying unit conveys the continuous sheet and the second conveying speed at which the second conveying unit conveys the continuous sheet, respectively. The conveyance control of the continuous sheet is performed so that the absorbent article joins the normal position of the continuous sheet,
In the transport control, when the first transport speed is increased, the second transport speed is increased, and when the first transport speed is decreased, the second transport speed is decreased. A package manufacturing method characterized by the above. The package manufacturing method according to claim 1,
In the transport control, the package manufacturing method is characterized in that a control is performed to maintain a constant ratio between the first transport speed and the second transport speed. The package manufacturing method according to claim 2,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the transport control, control to match the magnitude of the first transport speed and the second transport speed,
In the sealing cutting step,
The rotating part of the sealing and cutting device having the rotating part and the sealing and cutting part provided in the rotating part rotates the sealing and cutting part intermittently to contact the continuous sheet, and Sealing and cutting the continuous sheet,
By controlling to change the phase of the rotating part, position adjustment is performed so that the sealing cutting position on the continuous sheet is a normal position,
Acquiring deviation information of the display element by an imaging device,
Estimating the amount of deviation from the normal position of the sealing cutting position based on the obtained deviation information,
The package manufacturing method characterized by performing the said position adjustment by performing the said control according to the said deviation | shift amount estimated. The package manufacturing method according to claim 1,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
The second transport unit is located downstream of the first transport unit in the transport direction,
In the sealing cutting step,
By changing the transport path of the continuous sheet from the second transport unit to the sealing cutting device by the path changing unit, the path length of the transport path is changed,
The package manufacturing method characterized by performing position adjustment so that the sealing cutting position on the said continuous sheet may become a regular position by control which changes this path | route length. The package manufacturing method according to claim 4,
The said route change part is located in the conveyance direction downstream rather than the folding part which performs the said folding process, The package body manufacturing method characterized by the above-mentioned. The package manufacturing method according to claim 1,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
The second transport unit is located downstream of the first transport unit in the transport direction,
The tape applicator located on the upstream side in the transport direction from the sealing and cutting device has a tape applicator step of attaching a tape member to the folded continuous sheet,
In the tape application process,
The path length of the transport path is changed by changing the transport path of the continuous sheet from the second transport unit to the tape applicator by the path changing unit,
The package manufacturing method characterized by performing position adjustment so that the tape affixing position on the continuous sheet becomes a normal position by the control for changing the path length. The package manufacturing method according to claim 1,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the sealing cutting step,
The rotating part of the sealing and cutting device having the rotating part and the sealing and cutting part provided in the rotating part rotates the sealing and cutting part intermittently to contact the continuous sheet, and Sealing and cutting the continuous sheet,
The package manufacturing method characterized by performing position adjustment so that the sealing cutting position on the continuous sheet becomes a normal position by controlling to change the phase of the rotating part. The package manufacturing method according to claim 1,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
A tape applicator located on the upstream side of the sealing and cutting device and having a rotating part and a tape attaching part provided on the rotating part applies the tape member to the folded continuous sheet. A tape attaching process to attach,
In the tape application process,
When the rotating unit of the tape applying device rotates, the tape applying unit is intermittently brought into contact with the continuous sheet, and the tape member is applied.
The package manufacturing method characterized by performing position adjustment so that the tape application position on the continuous sheet becomes a normal position by control to change the phase of the rotating part. The package manufacturing method according to claim 1,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the transport step, the continuous sheet is transported in the transport direction by the first transport unit, the second transport unit, and the third transport unit located downstream of the transport unit in the transport direction,
In the sealing cutting step,
By adjusting the third conveying unit without interlocking with the first conveying unit and the second conveying unit, the position adjustment is performed so that the sealing cutting position on the continuous sheet becomes a normal position. A package manufacturing method characterized. The package manufacturing method according to claim 9,
Said 3rd conveyance part is located in the conveyance direction downstream rather than the folding part which performs the said folding process, The package manufacturing method characterized by the above-mentioned. The package manufacturing method according to claim 1,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
In the transport step, the continuous sheet is transported in the transport direction by the first transport unit, the second transport unit, and the third transport unit located downstream of the transport unit in the transport direction,
The tape applicator located on the upstream side in the transport direction from the sealing and cutting device has a tape applicator step of attaching a tape member to the folded continuous sheet,
In the tape application process,
By adjusting the third conveying unit without interlocking with the first conveying unit and the second conveying unit, the position adjustment is performed so that the tape attaching position on the continuous sheet becomes a normal position. A package manufacturing method characterized. A package manufacturing method according to any one of claims 4 to 11,
In the sealing cutting step,
Acquiring deviation information of the display element by an imaging device,
Estimating the amount of deviation from the normal position of the sealing cutting position based on the obtained deviation information,
The package manufacturing method characterized by performing the said position adjustment by performing the said control according to the said deviation | shift amount estimated. A package manufacturing method according to any one of claims 4 to 11,
In the sealing cutting step,
Acquire the cumulative feed amount of the continuous sheet,
Estimating the amount of deviation from the normal position of the sealing cutting position based on the acquired cumulative feed amount,
The package manufacturing method characterized by performing the said position adjustment by performing the said control according to the said deviation | shift amount estimated. The method for manufacturing a package according to any one of claims 1 to 13,
The cutting step is a sealing cutting step for sealing the folded continuous sheet while cutting between the adjacent absorbent articles,
The package manufacturing method, wherein a path length of a continuous sheet conveyance path from the folding section to the sealing cutting section is shorter than a path length of a continuous sheet conveyance path from the merge position to the folding section. . A packaging body manufacturing apparatus for manufacturing a packaging body in which an absorbent article is packaged by a packaging sheet,
A first transport unit and a second transport unit that transport the continuous sheet in the transport direction, which is a material of the packaging sheet, and the display element is repeatedly formed in the continuous direction;
A joining device that sequentially joins the absorbent articles at a joining position located between the first transport unit and the second transport unit with respect to the continuous sheet being transported,
A folding part for folding the continuous sheet so as to wrap the merged absorbent article;
A cutting device that cuts the folded continuous sheet between adjacent absorbent articles to generate the package;
Based on the deviation information of the display element, by increasing or decreasing the first conveying speed at which the first conveying unit conveys the continuous sheet and the second conveying speed at which the second conveying unit conveys the continuous sheet, respectively. The conveyance control of the continuous sheet is performed so that the absorbent article joins the normal position of the continuous sheet,
In the transport control, transport is controlled so that the second transport speed is increased when the first transport speed is increased, and the second transport speed is decreased when the first transport speed is decreased. A package manufacturing apparatus comprising: a control unit;

Images