JP2010155705A - Control method and device of member carrying track - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control method and a device of a member carrying track capable of always arranging a member on a sheet in a specific arrangement pattern, even when a width variation and meandering are caused in the sheet. <P>SOLUTION: This control method of the member carrying track is a method for controlling a carrying track of a member 110 arranged in a periodic arrangement pattern on the sheet 100, by being arranged on the carrying sheet 100 while changing a position in the orthogonal direction to the carrying direction of the sheet 100, An arrangement pattern of the member is determined by simultaneously detecting in a plurality of places in a pattern one period of the member on a position in the width direction of the member 110 arranged on the sheet 100 and an end part position in the width direction of the sheet 100, and its arrangement patter is compared with a reference pattern of a preregistered member, and a correction is made on a supply position to the sheet 100 of the member 110 based on its difference. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a conveyance track of members arranged on a sheet to be conveyed.

In general, various absorbent articles such as sanitary napkins, panty liners (orimono sheets), incontinence pads, pants diapers and the like are manufactured by fixing another member to a conveyed sheet. For example, a member (mainly elastic elastic member) is attached to a pants-type absorbent article such as a diaper so as to draw a curve in the front-rear direction of the product for the purpose of providing a comfortable wearing feeling.
The arrangement of the members is provided with a positioning guide for the members in a direction (hereinafter referred to as the width direction) orthogonal to a line direction (hereinafter referred to as the conveyance direction) in which the material to be attached (hereinafter referred to as a sheet) flows continuously. A method is generally employed in which the sheet and the member are joined and fixed by hot melt or ultrasonic sealing after the positioning guide is reciprocated (see, for example, Patent Documents 1 and 2).
However, in the above method, even if the sheet width variation, the meandering, and the length variation due to the tension variation occur, the members are always supplied in a constant pattern. It may be fixed. Therefore, when fixing another member to the conveyed sheet, the position in the width direction of the member arranged on the sheet is detected downstream of the joining means for joining the sheet and the member, and the position data is also stored. In addition, feedback control is used to control the conveying trajectory of the member upstream of the joining means (see, for example, Patent Document 3).

JP-A-11-332913 JP 2001-310867 A JP 2006-282372 A

  However, in the method shown in Patent Document 3, since the position in the width direction of the sheet and the member is viewed at one place, it cannot be determined as a pattern, and is not suitable when the members are bonded in a curved shape.

  The present invention has been made in view of the above problems, and is a member that can always arrange members in a constant arrangement pattern even when sheet width variation or meandering occurs in the manufacture of various absorbent articles and the like. It is an object of the present invention to provide a method and apparatus for controlling a transport track.

  The present invention controls a conveyance trajectory of a member that is supplied to a conveyed sheet while changing a position in a width direction that is a direction orthogonal to the conveyance direction of the sheet, and arranged on the sheet in a periodic pattern. In this method, the position of the member arranged on the sheet in the width direction and the end position in the width direction of the sheet are simultaneously detected at a plurality of locations within one cycle of the pattern of the member. A method for controlling a member trajectory, wherein the arrangement pattern is calculated, the reference pattern of the member registered in advance is compared, and the supply position of the member to the sheet is corrected based on the difference. The object is achieved by providing.

  Further, the present invention is an apparatus for carrying out the above-described method for controlling the conveyance path of a member, the position of the member in the width direction at a plurality of positions within one period of the member arrangement pattern for the sheet on which the member is arranged, and Position detecting means for simultaneously detecting the end position in the width direction of the sheet, and detecting the rotational position of the roll that makes one rotation for every fixed length of the sheet, and operating the position detecting means when the roll is at a constant position A timing control unit for controlling the position of the sheet, and a reciprocating mechanism which is arranged upstream of the position detection unit in the sheet transport path and is capable of adjusting a moving position and a moving speed, and a path changing unit for changing the transport path of the member. The member reference pattern that has been registered in advance is obtained from the position in the width direction of the member detected by the position detecting means and the end position in the width direction of the sheet. It obtains a deviation from, there is provided a control device for conveyor track member comprises a control means, the controlling the conveyor track of the member actuates the said track changing means based on the deviation.

  According to the present invention, even when the sheet width fluctuates due to variations in sheet tension or basis weight variation, or when the sheet meanders, the members are accurately arranged along the edge of the sheet being conveyed. can do.

  Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.

  FIG. 1 schematically shows an embodiment in which a control device for a conveyance track of a member of the present invention (hereinafter also simply referred to as a control device) is used in a manufacturing process of a composite sheet used for an absorbent article. is there. In FIG. 1, reference numeral 1 denotes a control device, 100 denotes a sheet, 110 denotes a member, and 10 denotes a composite sheet in which the sheet and the member are joined.

FIG. 2 schematically shows a method for detecting an arrangement pattern of members arranged on a sheet according to the present invention. In FIG. 2, 100A is the end position in the width direction of the sheet 100, 110A is the position in the width direction of the member 110 (position in the same direction as the width direction of the sheet 100, hereinafter also referred to as member position), and 110B is the position of the member 110. An arrangement pattern, 110C is a reference pattern of the member 110, 120 is an inspection area, and 130 is an imaging area. In FIG. 2, x is the width direction of the sheet 100, and y is the length direction of the sheet 100. The y direction is also the conveyance direction of the sheet 100.
The small circle on the arrangement pattern 110B in FIG. 2 highlights the position of the member 110 in the sheet width direction (member position) detected in each of the inspection regions 120 provided in the imaging region 130, and the reference A square on the pattern 110C highlights the position of the reference pattern 110C in each inspection region 120.

  The control device 1 according to the present embodiment controls the supply position of the member 110 arranged in a desired pattern on the conveyed sheet 100.

  The control device 1 includes a trajectory changing unit 5 that changes the transport trajectory of the member 110 in the order from upstream to downstream of transport of the sheet 100. The trajectory changing means 5 is also a supply means for the member 110. And the position detection means 2 which detects simultaneously the position of the width direction of the member 110 on the sheet | seat 100 in which the member 110 is arrange | positioned in the downstream, and the edge part position of the width direction of the sheet | seat 100 is provided. Further, as shown in FIG. 1, a timing control unit 4 for operating the position detection unit 2 and a control unit 7 for operating the trajectory changing unit 5 to control the conveyance trajectory of the member 110 are provided.

  Further, a joining means 6 for joining the sheet 100 and the member 110 is disposed between the trajectory changing means 5 and the position detecting means 2 in the transport trajectory of the sheet 100.

The control device 1 includes a member position 110A disposed on the sheet 100 conveyed in the longitudinal direction and a position detection unit 2 that simultaneously detects the sheet end position 100A.
Further, downstream of the position detecting means 2 is provided with a cutting means 3 for cutting the sheet 100 into a length used for one absorbent article. The cutting means 3 includes a cut roll 31 that rotates once for a certain length of the sheet 100, and the cut roll 31 of this embodiment cuts the sheet 100 into a length that is used for one absorbent article in one rotation. is doing.

  The position detection means 2 illuminates the CCD (charge coupled device) camera (imaging device) 21 that captures the member position 110A and the sheet end position 100A at a predetermined angle of view, and the imaged portion of the sheet 100 by the CCD camera 21 from the back side. An illuminator 22 and an image processing device 23 that receives image data captured by the CCD camera 21 and performs image processing to detect an arrangement pattern 110B of the member 110 are provided.

  The cutting means 3 includes a cut roll 31 that cuts the sheet 100 with a length that is used for one absorbent article per rotation, that is, a length that corresponds to one cycle of the member arrangement pattern 110B, and a predetermined length of the cut roll 31. A servo motor 32 that rotates at a speed, and a pulley 33 and a belt 34 that transmit the rotation of the servo motor 32 to the cut roll 31 are provided.

  The timing control means 4 detects the rotational position of the cut roll 31 and the image processing device 23 when the rotational position of the cut roll 31 detected by the position detector 41 is at a preset specific position. An electronic cam device 42 for transmitting an analog signal is provided. The timing control unit 4 operates the position detection unit 2 by transmitting an analog signal to the image processing device 23.

  Also, the image processing device 23 receives the analog signal from the electronic cam device 42 and simultaneously operates the CCD camera 21 to capture an image including the position data of the member, and with respect to the image received from the CCD camera 21. By performing image processing, the arrangement pattern 110B of the member 110 is detected.

  The trajectory changing means 5 is disposed upstream of the position detecting means 2 in the transport trajectory of the sheet 100 and has a reciprocating mechanism capable of adjusting the moving position and moving speed. Specifically, the reciprocating mechanism includes a support 51 that supports the member 110, and a rail 52 that can contact the support 51 in an unfixed state and slide the support 51 in a direction perpendicular to the conveyance path of the sheet 100. A belt 53 that is connected to the support 51 and reciprocates the support 51 along the rail 52; a servomotor 54 that reciprocates the belt 53 at a predetermined speed; and a pulley 55 that transmits the rotation of the servomotor 54 to the belt 53. The support 51 has a movement position and a movement speed that can be adjusted along the rail 52. That is, it has a reciprocating mechanism that can freely adjust the supply position of the member 110 with respect to the sheet 100 and the moving speed of the support 51 that moves the supply position. Thereby, the member 110 is supplied while changing the position (orbit) in the width direction (x direction) which is a direction orthogonal to the conveyance direction of the sheet 100.

  The joining means 6 includes a joining device that joins the sheet 100 and the member 110 supplied thereon in a desired pattern without breaking the arrangement pattern by a known joining method such as an adhesive, heat sealing, or ultrasonic sealing. ing.

  The control means 7 obtains the member arrangement pattern 110B from the position 110A in the width direction of the member 110 and the sheet end position 100A detected by the image processing device 23 of the position detection means 2, and pre-installs any device of the control means 7 in advance. Is provided with a sequencer 71 having a signal conversion function for obtaining a deviation 140 from the reference pattern 110 </ b> C of the member registered in 1 and converting the deviation 140 into an analog signal corresponding to the control means 7.

  Further, the control means 7 includes a controller 72 for controlling the servo motor 53 based on an analog signal output from the sequencer 71 or a member reference cam curve 150A as shown in FIG.

  Further, as shown in FIG. 1, display / setting means 8 is provided. The display / setting unit 8 includes a screen for displaying an image processed by the image processing device 23 and a setting device for setting the sequencer 71.

  Next, a preferred embodiment of the method for controlling the transport trajectory of the member of the present invention will be described based on the control method for the transport trajectory of the member 110 using the control device 1.

In the control method of this embodiment, first, as shown in FIG. 1, the control device 1 is arranged on the conveyance path of the sheet 100. Then, a member position 110A, which is a position in the width direction of the member 110 that is arranged in advance in a desired pattern by the trajectory changing unit 5 and conveyed in a state of being bonded to the sheet 100 by the bonding unit 6, and the width of the sheet 100 An end position 100A in the direction is detected by the position detection means 2.
Specifically, the member position 110A and the sheet end position 100A sent through the trajectory changing means 5 are illuminated from the back side with the illuminator 22 in the imaging portion within the range of one period of the member arrangement pattern. The surface of the photographing part is photographed with the CCD camera 21. The image data captured by the CCD camera 21 is received by the image processing device 23, and image processing is performed to detect the arrangement pattern 110B of the member 110.

  In the detection by the position detecting means 2, the rotation position of the cut roll 31 detected by the position detector 41 is transmitted to the electronic cam device 42, and the rotation position of the cut roll 31 becomes a specific rotation position set in advance. An analog signal is transmitted from the electronic cam device 42 to the image processing device 23, the CCD camera 21 is operated based on the analog signal to photograph the sheet 100 on which the member 110 is arranged, and the photographed image data is captured by the image processing device 23. Received.

  The analog signal transmission timing from the electronic cam device 42 to the image processing device 23 is set when the trajectory changing means 5 is operated while the sheet 100 is fed in the longitudinal direction at an arbitrary speed, and the member 110 is arranged in a desired pattern. In addition, it is preferable that the display / setting unit 8 sets the image data while confirming the image data so that one period of the member arrangement pattern falls within the imaging region 130.

  Next, detection of the member position 110A and the sheet end position 100A by the image processing apparatus 23 will be described. Image data for one period of the arrangement pattern captured by the CCD camera 21 is processed by the image processing device 23. Specifically, the inspection areas 120 arranged at a plurality of locations in the imaging area 130 imaged at a predetermined angle of view shown in FIG. 2 are pixel data corresponding to the number of pixels of the CCD camera 21 (0 to 255 gradations). For example, it is represented by a graph as shown in FIG. Note that although the reference pattern 110C shown in FIG. 2 does not appear in the imaged imaging region 130, it is shown for easy understanding.

The graph shown in FIG. 3A is pixel data in the x direction in the inspection region 120 for an arbitrary pixel in the y direction in the inspection region 120 shown in FIG. In FIG. 3A, a portion where neither the sheet 100 nor the member 110 is shown (the left portion of the left sheet end position 100A, the right portion of the right sheet end position 100A) is bright as an image, and pixel data The number of is large. On the other hand, the portion of the sheet 100 (100A in FIG. 3A) and the member 110 (110A in FIG. 3A) is darker as the image and the numerical value of the pixel data is smaller than the portion where nothing is shown. . The member 110 (110A in FIG. 3A) disposed on the sheet 100 (100A in FIG. 3A) is darker as an image than the sheet 100, and the numerical value of the pixel data is small.
In this way, the number of graphs corresponding to the total number of pixels in the y direction of one inspection region 120 (FIG. 3A is one of them) is averaged and differentiated, and the maximum of the differentiation result is obtained. When data conversion is performed so that the minimum value becomes ± 100%, the result is as shown in FIG.

  Then, the position data of the member position 110A and the sheet end position 100A in the inspection region 120 are calculated based on the threshold values set for specifying the member position 110A and the sheet end position 100A. The same processing is performed for other inspection regions 120 in the same imaging region 130, and position data of a plurality of inspection regions 120 is calculated. In the present embodiment, the position 110A in the width direction for each inspection region 120 of the member 110 disposed on the sheet 100 for each absorbent article is performed for each absorbent article (every rotation of the cut roll). Is calculated. It is preferable to set 4 to 10 inspection regions 120 for each absorbent article. In this way, by processing the plurality of inspection areas 120 in the same imaging area 130, the member position 110A and the sheet end position 100A arranged on the sheet 100 are changed to a plurality of positions within one pattern period of the member 110. At the same time.

  Next, the position data of the member position 110 </ b> A and the sheet end position 100 </ b> A of each inspection area 120 calculated by the image processing device 23 is sent to the sequencer 71. The sequencer 71 calculates the arrangement data 110D of the member 110 from the member position 110A and the sheet end position 100A in order to obtain the arrangement pattern of the member 110. Specifically, the sheet end position 100A is used as a reference, and calculation is performed by subtracting the sheet end position 100A and the member position 110A, and the arrangement data 110D is converted into an analog signal corresponding to the controller 72. Although FIG. 2 shows the left and right two sheet edge positions 100A, either one may be used as a reference, and the sheet center position is obtained from the two right and left sheet edge positions 100A. The arrangement data 110D may be obtained with reference to.

  In the controller 72, the arrangement data 110D sent from the sequencer 71 is arranged in the same order as the arrangement in the y direction of each inspection area 120 and connected by a curve, and the arrangement pattern of the members 110 is shown in FIGS. 4 (a) and 4 (b). 110B is obtained. In addition, one of the one period of the member arrangement pattern 110B is registered in the controller 72 as a reference pattern 110C in advance, and the reference pattern 110C is converted into an analog signal suitable for a speed command to the servo motor to create a reference cam curve 150A. To do.

  In addition, the controller 72 compares the reference pattern 110C and the member arrangement pattern 110B, and calculates a deviation 140 in the width direction of the member. Then, as shown in FIG. 4, a member correction cam curve 150B is created by adding a shift correction 140A to the member reference cam curve 150A in a direction in which the shift 140 in the width direction of the member is eliminated. Further, the data of the member correction cam curve 150B created as described above is copied to the member reference cam curve 150A, and the servo motor 54 is controlled based on the member reference cam curve 150A in which the deviation 140 is corrected. Such correction of the member reference cam curve 150A is performed for each product.

  Here, the control of the servo motor 54 when FIG. 1 and FIGS. 4A and 4B are viewed along the transport direction will be specifically described. In FIG. 1, when the servo motor 54 is rotated to the right (left), the rotation is transmitted to the support tool 51 via the pulley 55 and the belt 53, so the support tool 51 moves to the right (left) side. Further, as shown in FIG. 4 (a), the servo motor 54 is controlled along the member reference cam curve 150A, so that the member arrangement pattern period of 0 ° to 90 ° is rotated to the left, and 90 ° to 270 ° is rotated to the right. It rotates counterclockwise between 270 ° and 360 °. Therefore, the member 110 supplied by the trajectory changing means 5 is disposed on the sheet 100 in a shape along the member reference cam curve 150A.

  However, the actual arrangement pattern 110B may have a deviation 140 compared to the reference pattern 110C. In this case, a member correction cam curve 150B is created by correcting the member reference cam curve 150A by the same amount as the shift 140 and the direction is reversed, and is copied to the member reference cam curve 150A. The servo motor 54 is controlled.

  Therefore, the servo motor 54 can correct the supply position of the member 110 to the sheet 100 based on the difference obtained by comparing the arrangement pattern 110B and the reference pattern 110C. Further, since the trajectory changing means 5 is operated according to the member reference cam curve 150A after the deviation 140 is corrected to control the transport trajectory of the member 110, the member 110 is supplied in an appropriate pattern for each absorbent article. be able to.

  The sheet 100 is preferably non-stretchable because the member position 110 </ b> A does not vary significantly due to deformation due to tension variation. In addition, since the member arrangement pattern 110B is detected using the CCD camera 21, it is preferable to use a material having low light shielding properties and little basis weight unevenness.

  The member 110 is preferably a material that is thin and thin in order to suppress distortion and wrinkles when arranged in a curved shape, and has elasticity and stretchability. Further, since the member arrangement pattern 110B is detected by the difference in contrast with the sheet 100 using the CCD camera 21, it is preferable to use a material having a high light shielding property.

  There are no particular restrictions on the method for joining the sheet 100 and the member 110, but taking into account the joining without breaking the member arrangement pattern 110B and the stability detection of the member arrangement pattern 110B, an adhesive such as hot melt, heat sealing, and ultrasonic sealing The joining by is preferable.

  According to the control device 1 of the present embodiment and the method for controlling the transport trajectory of the member 110 using the same, the following effects are exhibited. In the present embodiment, since the position in the width direction of the member arranged on the sheet and the end position in the width direction of the sheet are simultaneously detected at a plurality of locations within one period of the member arrangement pattern, the width of the sheet 100 is Even when there is a change or meandering, the sheet end position 100A can be detected accurately, so that the member 110 can be positioned with high accuracy along the sheet end position 100A100B.

  Further, since the member arrangement pattern 110B is detected two-dimensionally, the influence of thickness variation of the sheet 100 and material unevenness can be suppressed. Therefore, the member 110 that merges with the sheet 100 can be positioned with high accuracy.

  Moreover, since the member arrangement pattern 110B is detected at a cycle of one product of the desired absorbent article, the width inspection and the appearance inspection of the absorbent article can be performed.

  Furthermore, the member arrangement pattern can be changed by changing the setting of the sequencer 71 via the display / setting means 8 while monitoring the image of the image processing device 23.

  As mentioned above, although one Embodiment of the control method and control apparatus of the conveyance track | orbit of the member of this invention was described, this invention is not restrict | limited to embodiment mentioned above.

  For example, in the control device 1 and the control method of the above-described embodiment, an optical imaging device (camera) is used as the position detection unit 2, but a one-dimensional sensor such as a line sensor is conveyed in a direction orthogonal to the sheet conveyance direction. It is also possible to use a plurality arranged in the direction.

  Further, the trajectory changing means 5 may be provided in the same number as the number of the inspection areas 120, and the conveyance trajectory of the members 110 may be controlled according to the position of the member 110 detected in each inspection area.

  In the control device 1 of the embodiment, the sequencer 71 and the controller 72 are used. However, the controller 1 can be replaced with a single controller having these functions.

  Further, the present invention is not limited to the control of the conveying path of the member when one member is arranged on one sheet as in the above embodiment, or two or more sheets stacked or two sheets The present invention can also be applied to the control of the reaction trajectory of a member when one or two or more members are disposed on the above-mentioned sheet bonded in the width direction.

The absorbent article of the present invention is mainly used for absorbing and holding excretory body fluids such as urine and menstrual blood. Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads, and the like, but are not limited to these, and widely include articles used to absorb liquid discharged from the human body.
The absorbent article typically includes a top sheet, a back sheet, and a liquid-retaining absorbent body disposed between both sheets. Absorbent articles generally have a skin contact surface that contacts the wearer's skin when worn and a non-skin contact surface directed to the opposite side (usually clothing side such as shorts). The back sheet is disposed on the skin contact surface side, and the back sheet is disposed on the non-skin contact surface side. As the top sheet, the absorber and the back sheet, materials usually used in the technical field can be used without any particular limitation. For example, as the surface sheet, a liquid permeable sheet made of a perforated film or a nonwoven fabric can be used, and as the absorber, a fiber assembly made of a fiber material such as pulp fiber or an absorbent polymer is held by this. It is possible to use a material coated with a covering sheet such as tissue paper or non-woven fabric, and the back sheet is liquid-impermeable or repellent such as a thermoplastic resin film or a laminate of the film and non-woven fabric. An aqueous sheet can be used. The back sheet may have water vapor permeability.

The absorbent article may further include various members according to specific uses of the absorbent article. Such members are known to those skilled in the art.
For example, on each side in the longitudinal direction of an absorbent article such as a disposable diaper, sanitary napkin, incontinence pad, etc., a three-dimensional guard composed of a strip-shaped sheet material and a thread-like elastic member fixed in an expanded state to the sheet material, Can be arranged. Such a three-dimensional guard is also mentioned as an example of the member arrange | positioned on a sheet | seat using the method and apparatus of this invention. As a sheet | seat in the case of arrange | positioning a solid guard, the surface sheet of an absorbent article, etc. are mentioned.

  The present invention can also be applied to the control of the transport trajectory of the members other than the control of the transport trajectory of the members used in the absorbent article as in the above embodiment.

It is a perspective view which shows typically one Embodiment of the control apparatus of the conveyance track | orbit of the member of this invention. It is a schematic diagram for demonstrating the detection method of the member arrangement pattern by a position detection means, and is a top view of an imaging part. It is a schematic diagram for demonstrating the detection method of the member position and sheet | seat edge part position by a detection means, (a) is an example of the pixel data in a test | inspection area, (b) differentiates the pixel data of (a). It is a figure which shows the result. It is a schematic diagram for demonstrating the correction method of the member reference | standard cam curve by a control means, (a) is a cam curve for 1 period of patterns, (b) is a figure which expands a part of (a) and shows details. It is.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control apparatus of member conveyance orbit 2 Position detection means 21 CCD camera (imaging machine)
DESCRIPTION OF SYMBOLS 22 Illuminator 23 Image processing apparatus 3 Cutting means 31 Cut roll 32 Servo motor 33 Pulley 34 Belt 4 Timing control means 41 Position detector 42 Electronic cam apparatus 5 Orbit change means 51 Supporting tool 52 Rail 53 Belt 54 Servo motor 55 Pulley 6 Joining Means 7 Control means 71 Sequencer 72 Controller 8 Display / setting means 10 Composite sheet 100 Sheet 100A Sheet edge position 110 Member 110A Member position 110B Arrangement pattern 110C Reference pattern 120 Inspection area 130 Imaging area 140 Deviation 150 Cam data 150A Member reference cam curve 150B Member correction cam curve

Claims (8)

This is a method for controlling the transport trajectory of a member that is supplied to a transported sheet while changing the position in the width direction, which is a direction orthogonal to the transport direction of the sheet, and arranged on the sheet in a periodic pattern. And
About the position in the width direction of the member arranged on the sheet and the end position in the width direction of the sheet, the arrangement pattern of the member is obtained by simultaneously detecting at a plurality of locations within one cycle of the pattern of the member, A method for controlling a conveyance path of a member, wherein the arrangement pattern is compared with a reference pattern of a member registered in advance, and the supply position of the member to the sheet is corrected based on the difference.   The method for controlling a member trajectory according to claim 1, wherein an arrangement pattern of the members arranged in a periodic pattern on the sheet is detected every pattern period.   The method according to claim 1 or 2, wherein a strip-shaped material having elasticity in the transport direction is used as the member.   The method for controlling a member transport track according to claim 1 or 2, wherein a material obtained by bonding a stretchable material to a belt-like non-stretchable material is used as the member. An apparatus for carrying out the method for controlling a conveyance trajectory of a member according to any one of claims 1 to 4,
Position detecting means for simultaneously detecting the position in the width direction of the member and the end position in the width direction of the sheet at a plurality of locations within one period of the member arrangement pattern for the sheet on which the member is disposed;
A timing control unit that detects a rotational position of a roll that rotates once for each predetermined length of the sheet, and that operates the position detection unit when the roll is in a fixed position;
A trajectory changing means that is arranged upstream of the position detecting means in the transport path of the sheet, has a reciprocating mechanism capable of adjusting a moving position and a moving speed, and changes the transport path of the member;
From the position in the width direction of the member detected by the position detecting means and the end position in the width direction of the sheet, the arrangement pattern of the member is obtained and the deviation from the reference pattern of the member registered in advance is obtained, and the deviation is obtained. Control means for operating the trajectory changing means based on the control of the trajectory of the member;
The control apparatus of the conveyance track | orbit of the member provided with.   The member position trajectory control according to claim 4, wherein the position detection unit includes: an image pickup device that picks up an image of the sheet after joining the members; apparatus.   The manufacturing method of the composite sheet | seat with which the sheet | seat and the member were joined using the control method of the conveyance path | route of the member in any one of Claims 1-4, or the control apparatus of Claim 5 or Claim 6.   An absorbent article, wherein the composite sheet produced by the method according to claim 7 is included in one of the constituent materials.

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