JP4712756B2 - Manufacturing method of article - Google Patents

Description

The present invention relates to a manufacturing method and a manufacturing apparatus for manufacturing a different article sizes, in particular, disposable diapers, the production how to manufacture a disposable wearing article such as disposable pants or a sanitary napkin, such as incontinence pants or sanitary pants It is related.

U.S. Pat. No. 3,828,367 discloses a method for manufacturing disposable pants.
In general, disposable pants and the like may have a plurality of sizes such as S size, M size, and L size even if they are the same product. Since the configuration of these pants is basically the same, it is possible to manufacture pants and the like of a plurality of sizes with one machine.
However, since the size of the pants and the like varies depending on the size, it is necessary to replace some units, and there is a problem that the operating rate is lowered. Such a problem also occurs in other articles other than the worn article.
Therefore, an object of the present invention is to provide a method and an apparatus for manufacturing an article that do not require replacement of units and the like as much as possible. Another object of the present invention is to adjust the position at which the member or semi-finished product is processed according to the expansion or contraction of the member or semi-finished product.
US Pat. No. 3,828,367

In order to achieve the object, a manufacturing method of the present invention includes a processing step in which a processing unit applies processing to a web by rotating a rotating body , and the rotating body is in the middle of one cycle of processing by the rotating body. The manufacturing method of an article capable of producing an article of a second size different from the first size and the first size by changing the peripheral speed of the rotating body, wherein the processed portion is included in one cycle of the rotating body. Includes a work area where the semi-finished product is processed, and a non-work area where the processed portion does not process the semi-finished product, and generates the web expansion / contraction information, and the processing based on the expansion / contraction information And a step of correcting the time when the unit reaches the work area.

In the present invention, the rotating body generally includes a roll. For example, the following can be considered as the rotating body.
A seal roll may be the rotating body. A cutter roll may be the rotating body. A tape mounting roll may be the rotating body. A trim cutter roll may be the rotating body. A re-pitch drum may be the rotating body.
A seal roll and a cutter roll may be the rotating body. A seal roll and a tape mounting roll may be the rotating body. A seal roll and a trim cutter roll may be the rotating body. A cutter roll and a tape mounting roll may be the rotating body. A cutter roll and a trim cutter roll may be the rotating body. The tape attachment roll and the trim cutter roll may be the rotating body. A seal roll and a re-pitch drum may be the rotating body. A cutter roll and a re-pitch drum may be the rotating body. The tape mounting roll and the re-pitch drum may be the rotating body. A trim cutter roll and a re-pitch drum may be the rotating body.
A seal roll, a cutter roll, and a tape mounting roll may be the rotating body. A seal roll, a cutter roll, and a trim cutter roll may be the rotating body. A seal roll, a tape attachment roll, and a trim cutter roll may be the rotating body. A cutter roll, a tape attachment roll, and a trim cutter roll may be the rotating body. A seal roll, a cutter roll, and a re-pitch drum may be the rotating body. A seal roll, a tape mounting roll, and a re-pitch drum may be the rotating body. A seal roll, a trim cutter roll, and a re-pitch drum may be the rotating body. A cutter roll, a tape mounting roll, and a re-pitch drum may be the rotating body. A cutter roll, a trim cutter roll, and a re-pitch drum may be the rotating body. A tape mounting roll, a trim cutter roll, and a re-pitch drum may be the rotating body. A seal roll, a cutter roll, a tape attachment roll, and a trim cutter roll may be the rotating body. A re-pitch drum, a seal roll, a cutter roll, and a tape mounting roll may be the rotating body. A re-pitch drum, a seal roll, a cutter roll, and a trim cutter roll may be the rotating body. A re-pitch drum, a seal roll, a tape mounting roll, and a trim cutter roll may be the rotating body. A re-pitch drum, a cutter roll, a tape mounting roll, and a trim cutter roll may be the rotating body. A re-pitch drum, a seal roll, a cutter roll, a tape mounting roll, and a trim cutter roll may be the rotating body.

When the peripheral speed (angular speed) of the rotating body changes in the middle of one cycle, the peripheral speed of the machining part becomes different between the work area and the non-work area.
When changing the angular velocity of the rotating body in one cycle, the rotating body may be operated after being accelerated or decelerated from a certain reference speed and then decelerated or accelerated to return to the reference speed again.

The size of the semi-finished product may be the length of the semi-finished product in the flow direction.
The peripheral speed of the rotating body in the work area may be set to be equal to or higher than the speed approximate to the flow speed of the first size semi-finished product.
When the rotating body applies processing to the first size semi-finished product, the average peripheral speed of the rotating body in the working area is substantially the same as the average peripheral speed of the rotating body in the non-working area. When the length in the flow direction is shorter than that of the first-size semi-finished product, the average peripheral speed of the rotating body in the non-working area is faster than the flow size of the second-size semi-finished product, When the length of the product in the flow direction is longer than that of the first size semi-finished product, the average peripheral speed may be slower than the flow speed.

The other rotating body for transporting the received semi-finished product rotates while changing its peripheral speed according to the size of the semi-finished product, thereby changing the interval between the semi-finished products, The process of delivering may be further included.
An interval changing step of changing an interval between the absorbers by rotating another rotating body for conveying the absorber while changing its peripheral speed according to the size of the absorber. It may be included.
The elastic member can be arranged on the web by rotating another rotating body for reciprocating the guide portion for guiding the elastic member while changing its peripheral speed according to the size of the semi-finished product. Possible steps may be further included.

Based on the expansion and contraction of the front Symbol workpiece, a position for working the semi product may include the step of correcting.
Also, the a detection step of detecting a velocity signal having a speed information of the semi-finished product, a generation step of generating an interval signal in response to a particular portion of the semi-finished product passing through a predetermined point, from the distance signal a predetermined number of generating a timing signal when the counting rate signal, by said timing signal, may be corrected time when the processing unit reaches the working area.

A detection step of detecting a speed signal having speed information of the semi-finished product, a generation step of generating an interval signal according to a specific part of the semi-finished product passing through a predetermined point, and a speed signal measured between the interval signals A calculation step of calculating expansion / contraction of the semi-finished product based on the number of pulses and a reference pulse number, a step of correcting a predetermined number based on the expansion / contraction, and the predetermined number of speeds corrected from the interval signal You may correct | amend the time which the said process part arrives at the said work area with the process of producing | generating a timing signal when the signal is counted, and the said timing signal .
Based on the expansion and contraction of the front Symbol semifinished products, it may include a step of correcting a circumferential velocity of the rotating member in the working area.
A detection step of detecting a speed signal having speed information of the semi-finished product, a generation step of generating an interval signal according to a specific part of the semi-finished product passing through a predetermined point, and a speed signal measured between the interval signals And calculating the expansion / contraction of the semi-finished product based on the reference number and correcting the peripheral speed of the rotating body in the work area based on the expansion / contraction.

You may include the process which correct | amends at least one of the peripheral speed and phase of said other rotary body based on the expansion-contraction of the said semi-finished product.
A detection step of detecting a speed signal having speed information of the semi-finished product, a generation step of generating an interval signal according to a specific part of the semi-finished product passing through a predetermined point, and a speed signal measured between the interval signals A calculation step of calculating expansion / contraction of the semi-finished product based on the number and a reference value, and a step of correcting at least one of the peripheral speed and phase of the other rotating body based on the expansion / contraction Also good.
By the cutter roll, the step of cutting the member by a predetermined length, the step of transporting the cut member by the transporting portion of the transporting roll, and the cut member by the convex portion of the transporting roll and the crimping roll A step of attaching the web to the web at a first interval, the pressure roll is rotated as the rotating body, the convex portion is affixing the member to the web, and an average peripheral speed of the transport roll is not equal to a work area. It may be different in the work area.
And correcting at least one of the peripheral speed and the phase of the crimping roll in the work area based on the expansion and contraction of the web.

  Furthermore, the manufacturing apparatus provided with the said rotary body may have a guide part. The manufacturing apparatus provided with the said rotary body may have a laser cutter. The manufacturing apparatus provided with the said rotary body may have a water jet cutter. The manufacturing apparatus provided with the said rotary body may have a guide unit and a laser cutter. The manufacturing apparatus provided with the said rotary body may have a guide unit and a water jet. Moreover, the manufacturing apparatus for realizing the manufacturing method may have other processing means.

  Moreover, in this invention, the rotary body may include the roll provided with the 1 or more process part which processes material or a semi-finished product. As a roll provided with the process part, there may be the said sealing roll which seals material or a semi-finished product, the said cutter roll which cut | disconnects articles | goods, the said tape attachment roll which adheres a tape to a web, etc., for example.

Principle of the invention:
The principle of the present invention will be described below.
Conventionally, a mat cutter unit or the like that cuts a continuous absorber has been replaced according to the size of an article to be manufactured. For example, assuming that the total length of the L size, M size, and S size articles is L3, L2, and L1, respectively, the L size, M size, and S size generally correspond to L3, L2, and L1, respectively. Cutter rolls having a perimeter were used, and these rolls were rotated at a substantially constant rotation speed (number of rotations / minute).
However, it is possible to produce a mat of any length by changing the speed at which the cutter roll rotates.

FIG. 1A is a view showing a rotating body 2 having a processing portion 1. The rotating body 2 can process a material or a semi-finished product (hereinafter collectively referred to as “semi-finished product”) of the article by rotating. For example, when the rotating body 2 is a cutter roll having a blade, a process of cutting a semi-finished product can be added.
For example, when the processing unit 1 shown in FIG. 1A performs processing on a semi-finished product, that is, the processing unit 1 has a work area α (α = x−Δa to x + Δb: where x is the processing unit 1 of the semi-finished product. When positioned at the phase of the cutting point to be cut), the peripheral speed of the processing unit 1 (peripheral speed at the time of processing) is set to be substantially the same as the flow speed V _{W of the} web W or increased by a predetermined ratio, When the processing unit 1 is located in another region β = (0 to x−Δa and x + Δb to 2π), that is, the non-working region β, the peripheral speed of the processing unit 1 is set to a speed according to the size of the article. The interval at which the product is processed matches the size of the article.
When an L size article is manufactured by using an M size cutter roll while leaving the web flow speed as it is, and simply reducing the rotational speed of the cutter roll, the peripheral speed of the cutting edge (working part) is reduced. Since it becomes slower than the flow velocity V, it may be difficult to cut the continuous mat.

When manufacturing an L-size article using the M-size rotating body 2, as shown in FIG. 2A, the peripheral speed v (θ) of the processing section 1 is set to the flow speed V _W in the work area α. On the other hand, in the non-working region β, the average peripheral speed of the machining unit 1 is set to a value smaller than the flow speed V _W. However, depending on the control method, as shown in FIG. 2B, the peripheral speed v (θ) of the processing section 1 in the non-working region β may temporarily exceed the continuous mat flow speed V _W.
Now, as shown in FIG. 1B, when the diameter r is the distance from the rotation center of the rotating body 2 to the tip of the processed part 1, that is, the diameter r is the rotational radius of the processed part 1, FIG. The following expression (1) is derived. That is, as long as the time T _L required for one rotation is constant, the peripheral speed of the rotating body 2 may change in any way in the non-working region β. For example, as shown in FIG. 2C, the peripheral speed v (θ) of the processing unit 1 may slightly change in the work area α.
In the work area α, the peripheral speed v (θ) of the processing unit 1 may be a constant multiple of 1 or more than the flow speed V _W.
Note that the distance r from the rotation center of the rotating body 2 to the tip of the processing unit 1 may be considered as the radius of the rotating body 2 when the difference between the distance r and the radius of the rotating body 2 is small.

On the other hand, when an S-size article is manufactured using the M-size rotating body 2, as shown in FIG. 3A, the peripheral speed v (θ) approximate to the flow speed V _W is set in the work area α. On the other hand, in the non-working area β, the average peripheral speed is set to a value larger than the flow speed V _W. That is, as long as the time T _S required for one rotation shown in the equation (2) in FIG. 3C is constant, the peripheral speed of the rotating body 2 may be changed in any way in the non-working region β.
In the work area α, the circumferential speed v (θ) may be a constant multiple of 1 or more than the flow speed V _W. For example, as shown in FIG. 3B, the circumferential speed v (θ) in the work area α. May vary slightly.

When M size machining is performed with the M size rotating body 2, the peripheral speed v (θ) may be a constant value larger than the flow speed V _W, and the time required for one rotation is T _M. Then, T _S <T _M <T _L.

In the present invention, as shown in FIG. 1C, a plurality of processed portions 1 </ b> A and 1 </ b> B may be equally provided on one rotating body 2.
In this case, the cycle time T _i of one cycle after the processing portion 1A is processed until the next processing portion 1B is processed is substantially constant for each size as shown in the equation (3) in FIG. 4B. If it is. In this case, as shown in FIG. 4A, a plurality of cycles are executed while the roll makes one rotation, and an angle P obtained by dividing 2π by the number N of processed parts is one cycle. That is, after the machining by the (first) machining unit 1A in FIG. 1C, the next machining (by the second machining unit 1B) is one cycle. Thus, the size is controlled by controlling the peripheral speed of the processing parts 1A and 1B according to the size of the article (changing the peripheral speed of the processing part along a predetermined speed curve corresponding to the size). Different articles can be manufactured. That is, when the processing unit rotates, the phase may change, and the peripheral speed of the processing unit may change according to the phase. Further, the peripheral speed of the processed part varies depending on the position of the processed part on the polar coordinates, and thereby articles of different sizes may be manufactured.

Note that when the rotating body 2 rotates in one direction, it is difficult to assume that the rotating body 2 stops during operation (v (θ) becomes 0), but v (θ) = 0 may be assumed temporarily. if the stop time Δt of the rotary body is added to the T _i, it may obtain the time required for one cycle. Further, the above-described equations (1) to (3) may be applied except for a section where v (θ) = 0.

In addition, there is also the flow velocity V _W of the web W is varied. In this case, the change in the flow speed V _W can be absorbed by changing the rotation speed of the rotating body 2 in one cycle. In this case, a detector for detecting the speed of the web W may be provided, and the peripheral speed v (θ) of the processing unit may be controlled so as to be proportional to the detected web speed V _W. In addition, when a semi-finished product of a certain article is continuous as shown in FIG. 4C, the size is determined by the length of the semi-finished product in the flow direction, but as shown in FIG. If the product is discontinuous, the size of the semi-finished product may be determined by the distance between the boundaries of the semi-finished product.

  The mat cutter unit, the seal unit, the trim cut unit, and the like have a rotating body having a processing portion 1 and a roll facing the rotating body, and the facing roll rotates at substantially the same speed as that of the semi-finished product. The circumferential speed v (θ) of 1 may be synchronized with the circumferential speed of the facing roll. In the non-working region β, when the peripheral speed v (θ) of the machining unit 1 changes, the peripheral speed v (θ) has one or more inflection points or extreme values.

  As such a manufacturing apparatus, for example, a storage unit that stores the relationship between the phase of the processing unit and the peripheral speed of the processing unit corresponding to the phase for each article size, and when the size is designated, It is possible to employ an article manufacturing apparatus including a control unit that reads out the relationship and controls rotation of the roll according to the size.

Embodiments of the present invention will be described below with reference to the drawings.
5 to 8 and FIGS. 13 to 15 show the first embodiment.
FIG. 5 is a diagram illustrating an example of a manufacturing apparatus for manufacturing an article. Specifically, this manufacturing apparatus can manufacture a diaper, which is a type of worn article. This manufacturing apparatus includes at least one rotating body having a processing portion.
The manufacturing apparatus includes a press unit 3, an embossing unit 4, a cutter unit 5, a tape mounting unit 70, an assembly drum 8, a seal unit 9, a seal unit 10, a trim cutter unit 11, and a final cut unit 12 from upstream to downstream. It has.

Hereafter, each unit which comprises the said manufacturing apparatus is demonstrated.
The press unit 3 has a press roll 3a and an anvil roll 3b. Since the press unit 3 shown in FIG. 5 presses the continuous mat Wm, it usually does not have a convex portion. However, when a specific position of the mat Wm is pressed, or when the pressing position changes depending on the size, the press roll 3a serving as a rotating body may be controlled based on the principle of the present invention. The mat Wm capable of absorbing the liquid sent to the press unit 3 is formed to a predetermined thickness by the press roll 3a. In addition, it is preferable that the peripheral speed of the anvil roll 3b is substantially the same as the flow speed of the mat Wm.

The embossing unit 4 includes an embossing roll 4a and a receiving roll 4b that can apply pressure, heat, or both to a member or the like. A plurality of pins are arranged on the surface of the embossing roll 4a, and the embossing unit 4 makes a recess in the mat Wm that is pressed and hardened to a predetermined thickness. This depression can be expected to increase the strength of the mat Wm and improve the absorbability.
The surface of the receiving roll 4b may be a smooth curved surface, but the receiving roll 4b may be provided with holes corresponding to the pins of the embossing roll 4a. In the embossing unit 4 shown in FIG. 5, pins are evenly arranged on the entire surface of the embossing unit 4 in order to emboss the continuous mat Wm.
In addition, the embossing unit 4 is not restricted to what implements pin embossing. For example, the surface of the embossing roll 4a may be provided with a single blade, or a net-like or lattice-like convex part, or a convex part shaped like a heart, a club, a diamond, a spade, a circle, or a crescent moon. It may be arranged.
Here, when embossing is performed at a specific position of the mat Wm and the embossing position changes depending on the size, the embossing roll 4a serving as a rotating body may be controlled based on the principle of the present invention. In addition, when the hole corresponding to a pin is provided in the receiving roll 4b, the receiving roll 4b rotates according to rotation of the embossing roll 4a.

  The cutter unit 5 has a cutter roll 5a and an anvil roll 5b. The cutter unit 5 cuts the embossed mat Wm into a predetermined length. The predetermined length depends on the size of the article. Based on the principle of the present invention, the cutter roll 5a acting as a rotating body is controlled. Note that the cutter unit 5 is not required when the mats Wm are formed individually rather than continuously.

A cuff member Wc is introduced on the mat Wm cut to a predetermined length. The cuff member Wc may be fixed to the mat Wm with an adhesive or a seal. The adhesive is applied to at least one of the cuff member Wc and the mat Wm, but the application may be continuous or intermittent. When a hot melt is used as the adhesive, application may be performed by a system such as a bead, coater, spiral, curtain, spray, or transfer roll. As the type of hot melt, synthetic rubber or olefin may be used. The mat Wm subjected to the predetermined processing is sent to the assembly drum 8. Further, the cuff member Wc may be disposed on the back sheet Wr.
On the other hand, the frontal tape Wt is attached by the tape attachment unit 70 to the back sheet Wb on which the mat Wm is to be laminated.

FIG. 6A is a diagram illustrating an example of the tape attachment unit 70.
The tape attachment unit 70 includes a pair of pinch rolls 71 and 71 capable of extruding a predetermined length of the frontal tape Wt, a cutter roll 72 for cutting the tape Wt having at least one blade, and the cut tape Wt. Is provided with a transport roll 73 for transporting the tape and a pressure roll 74 for crimping the tape Wt and the back sheet Wb.

For example, the pinch rolls 71 and 71 may extrude the tape Wt continuously or intermittently extrude the tape Wt.
While the transport roll 73 rotates, the suction portion 76 sucks the tape Wt, so that the transport roll 73 and the tape Wt are rubbed. That is, when the tape Wt is continuously pushed out, the peripheral speed of the transport roll 73 is faster than the speed at which the pinch rolls 71 and 71 feed out the tape Wt. Even when the tape Wt is intermittently pushed out, when the average speeds are compared, the peripheral speed of the transport roll 73 is faster than the speed at which the pinch rolls 71 and 71 feed out the tape Wt.
The tape Wt is sandwiched between at least one blade 75 of the cutter roll 72 and the base 77 of the transport roll 73 with a predetermined length and cut. Since the base 77 receives the blade 75, it does not have a suction hole like the suction part 76. Further, the length of the suction portion 76 in the rotation direction is longer than a predetermined length of the tape Wt. Further, when the blade 75 and the base 77 abut via the tape Wt, the peripheral speed of the blade edge of the blade 75 is equal to or faster than that of the transport roll 73.

  Incidentally, the cutter roll 72 normally rotates while maintaining a predetermined peripheral speed. However, as shown in the principle of the present invention, the peripheral speed of the cutter roll 72 may be changed during one cycle. In this case, one cycle is a period from when one tape Wt is cut to when the next tape Wt is cut. Accordingly, this one cycle varies depending on the number of blades 75 arranged on the cutter roll 72 and the like.

The transport roll 73 transports the cut tape Wt to the work area α1 (x−Δa to x + Δb). On the other hand, the convex portion 78 of the press roll 74 moves to the work area α2 (x−Δc to x + Δd), and the tape Wt is fixed to the back sheet Wb in the overlap area of the work areas by the transport roll 73 and the press roll 74. . Specifically, the pressure-bonding roll 74 has at least one convex portion 78, and the convex portion 78 presses the back sheet Wb and the tape Wt against the transport roll 73, whereby the tape Wt is bonded to the back sheet Wb. .
In order to adhere the tape Wt to the back sheet Wb, the tape Wt may have an adhesion region. Further, the adhesive may be applied to the tape Wt during a period from when the tape Wt is fed from the pinch rolls 71 and 71 and cut by the cutter roll 72. When the surface of at least one pinch roll 71 is coated with a material having a strong peelability to the adhesive (for example, silicon, Teflon (registered trademark), etc.), the tape Wt is the pinch roll 71. , 71 before being fed out.

  Here, if there is no change in the size of the article, the peripheral speed of the transport roll 73 and the peripheral speed of the convex part 78 of the pressure-bonding roll 74 are substantially the same as the speed of the back sheet Wb. However, even when the size of the article is changed and the interval at which the tape Wt is attached to the back sheet Wb is changed, the peripheral speed of the transport roll 73 and the like in the work area α1 of the transport roll 73 is the speed of the back sheet Wb. Based on the principle of the present invention, the transport roll 73 and the like may be controlled so as to be substantially the same. Also for the pressure roll 74, the pressure roll 74 may be controlled so that the peripheral speed of the convex portion 78 is substantially the same as the speed of the back sheet Wb in the work area α2. That is, in the work area α1 of the transport roll 73, the transport roll 73 may be controlled so that the peripheral speed of the suction unit 76 holding the tape Wt is substantially the same as the speed of the back sheet Wb. Moreover, in the area where the two work areas α1 and α2 overlap, the time when the suction part 76 and the convex part 78 enter the respective work areas is controlled so that the tape Wt can be pressed against the back sheet Wb.

  As shown in FIG. 5, in the assembly drum 8, the back sheet Wb into which the elastic member Wf is introduced and the mat Wm into which the cuff member Wc is introduced are overlapped to seal the vicinity of the boundary between adjacent articles. The mat or the like is sealed by the seal unit 9 or the seal unit 10 for sealing the side of the article, and the composite W1 is generated. A method for introducing the elastic member Wf will be described later.

FIG. 6B is a diagram illustrating an example of the seal unit 9.
The seal roll 92 has at least one convex portion 91, and seals a semi-finished product between the convex portion 91 and the assembly drum 8, for example, the mat Wm and the back sheet Wb.
The type of seal may be heat seal or ultrasonic. In addition, when it is not possible to apply a heat quantity sufficient to seal the member at a time, sealing may be performed in a plurality of times. Moreover, you may preheat the location which should be sealed before sealing. Further, when sealing in a plurality of times, a plurality of sealing units 9 may be arranged on the assembly drum 8. Further, the preheating may be performed by a heater arranged on the assembly drum 8, hot air discharged toward a member to be sealed, or a combination thereof.
When heat sealing is performed, the convex portion 91 of the seal roll 92 applies at least pressure and heat to a portion to be bonded (heat-sealed) between the mat and the back sheet in order to bond the mat and the back sheet to form the composite W1. Add.
The configuration of the seal roll 92 is substantially the same as that obtained by replacing the processed portion 1 of the rotating body 2 shown in FIG. That is, an article of a certain size can be manufactured by rotating the seal roll 92 at a constant peripheral speed. Further, based on the principle of the present invention, it is possible to manufacture articles of other sizes without exchanging the seal roll 92.

  As shown in FIG. 5, in order to open a leg hole in the composite W <b> 1, the composite W <b> 1 is sent to the trim cutter unit 11, and a portion corresponding to the leg hole is cut out by the trim cutter unit 11.

FIG. 7 shows an example of the trim cutter unit 11.
The trim cutter unit 11 includes a trim roll 11a and an anvil roll 11b on which at least one loop-shaped blade 11c is disposed. As will be described later, a member between the blade 11c and the anvil roll 11b is cut out.

Next, a method for controlling the trim roll 11a will be described.
When manufacturing a wearing article having an M size leg hole using the trim roll 11a for forming an L size leg hole, the peripheral speed v (θ) of the trim roll 11a is combined in the work area α of the trim roll 11a. The trim roll 11a is rotated so as to be faster than the flow velocity V _W of the body W1 by a predetermined ratio R1. Thereby, the distance which the blade 11c contacts with the composite_body | complex W1 becomes short compared with the case where an L size leghole is manufactured. For this reason, a leg hole having a smaller area than the L-sized leg hole can be opened in the composite W1.
On the other hand, when manufacturing a wearing article having an S size leg hole using the trim roll 11a for the L size leg hole, in the work area α of the trim roll 11a, the peripheral speed v ( θ) may be rotated at a predetermined rate R2 faster than the flow speed of the composite W1. Here, R1 <R2.

As shown in FIG. 5, finally, the composites W <b> 1 are distributed one by one by the final cut unit 12. The final cut unit 12 has a cutter roll 12a and an anvil roll 12b. Similar to the cutter roll unit 5, the final cut unit 12 can manufacture an article of a certain size by rotating the cutter roll 12a at a constant peripheral speed. The final cut unit 12 can manufacture articles of other sizes based on the principle of the present invention without replacing the cutter roll 12a based on the principle of the present invention.
The manufacturing apparatus shown in FIG. 5 includes an adhesive supply machine 13. When a hot melt is used as the adhesive, the application may be performed by the method described above. Further, the interval at which the adhesive supply machine 13 applies the adhesive may be changed depending on the size of the article. The timing at which the adhesive is applied may be synchronized with a speed signal, an interval signal, or a timing signal CAT or CCT, which will be described later.

Below, an example of the control system for controlling a rotary body is demonstrated.
A control system 59 shown in FIG. 8A includes motor modules M _{1 to} M _n , a control unit 50 having a CPU (central processing unit) 51 and a memory 52, a display unit 53, and an input operation unit 54. In addition, a data link unit 55 and an encoder 56 may be provided.

  As shown in FIG. 8C, the motor module M includes a servo motor 61 that rotates a rotating body, and an amplifier 62 that amplifies a rotation signal supplied to the servo motor 61. Here, amplification is not limited to analog amplification. For example, when the rotation signal is a digital signal, conversion to a signal that allows the servo motor to rotate based on a value represented by the digital signal is also included.

In the memory 52, for example, the relationship information between the peripheral speed of the rotating body and the phase of the rotating body shown in FIGS. 2 (a) to 2 (c) is stored.
The relationship information may be in a data format, or may be given by the above-described equations (1) to (3). From the viewpoint of reducing the number of calculations by the CPU 51 and the like, it is preferable that the relationship information is given as data. For example, the phase of the rotating body and the peripheral speed of the rotating body corresponding to the phase may be stored as a pair of data. Further, the relationship information may be stored in the memory 52 or the like in association with the size of the article. For example, the relationship information and the size of the article are stored as a table, the phase of the rotating body is taken in the vertical direction of the table, the size of the article is taken in the horizontal direction of the table, and the table shows the phase of the rotating body and the size of the article. The peripheral speed of the rotating body corresponding to may be written. When the related information is stored in the memory 52 or the like, the related information may be input by the operator from the input operation unit 54, or a small portable terminal such as a notebook personal computer is linked to the data link unit 55. Thus, those relationships may be transferred from the small portable terminal to the memory 52. When the relationship information and the size of the article are stored in association with the memory 52 or the like, when the operator operates the input operation unit 54, the relation information corresponding to the size of the article is read from the memory 52, The CPU 51 may control the servo motor 61 in accordance with the formula or data to perform rotation control of the rotating body.

By linking the data link unit 55 and the Internet, two-way communication with a computer outside the manufacturing apparatus is possible. For this reason, the manufacturing apparatus can easily receive the related information upgraded through the Internet.
Note that an external computer may directly control the manufacturing apparatus from the external computer by obtaining information on an encoder and sensor S described later via the Internet.

The encoder 56 sends speed information regarding the line speed of the production line as shown in FIG. The encoder 56 may be installed anywhere as long as the speed information of the production line can be obtained. For example, the encoder 56 may detect rotation information of the mat cutter unit 5, the final cutter unit 12, or the assembly drum 8, and generate speed information based on the rotation information.
In synchronization with the speed information from the encoder 56, a plurality or all of the servo motors 61 rotate. That is, the phase of the rotating body at the predetermined reference point is synchronized with the speed information. The CPU 51 generates a rotation signal of the servo motor 61 based on the relationship information and the speed information, and sends a rotation signal unique to each of the motor modules M _{1 to} M _n . In the motor module M, the amplifier 62 amplifies the rotation signal, and the servo motor 61 is rotated by the amplified signal. Such a configuration may be applied to a production line that operates at a relatively low speed because the burden on the CPU 51 of the control unit 50 is large.

The control system 59 may include a motor module L as shown in FIG. 8D instead of the motor module M. The motor module L can store a servo motor 61 for rotating the rotating body, an amplifier 62 for amplifying a rotation signal given to the servo motor 61, and relationship information between the peripheral speed of the rotating body and the phase of the rotating body. You may have the memory 63 and CPU64 which can produce | generate a rotation signal. The motor module L may have the data link unit 55 described above.
The relation information that the control unit 50 has is sent to and stored in the memory 63 of the motor module L. In addition, the control unit 50 sends speed information from the encoder 56 to the motor module L. The motor module L generates a rotation signal based on the transmitted speed information and relationship information. The amplifier 62 amplifies the rotation signal, and the servo motor 61 is rotated by the amplified signal.

  When the relationship information and the size of the article are stored in association with each other, the operator operates the input operation unit 54 and specifies the size of the article, so that the relation information corresponding to the size of the article is stored in the memory 52. And may be sent to the memory 63 of the motor module L, or related information stored in the memory 63 may be selected by the operator. The motor module L may have an input operation unit.

  The control system for controlling the rotating body may be a control system 69 shown in FIG. The control system 69 can reduce the number of wirings compared to the control system 59. For this reason, the information output from the control part 50 of the control system 69 may be provided with the header part and the data part, as shown in FIG. In the header portion, control instructions and / or address information are written.

  Here, the control command is, for example, a command to write data portion information to the memory 63 or a command to erase data stored in the memory 63. The address information indicates which motor module L should receive the control command and / or data section information when there are a plurality of motor modules L. In the data portion, relationship information, speed information, or both may be written. However, since the speed information is important information for a certain rotator to synchronize with another rotator, the control unit 50 is different from the signal having the header part and the data part shown in FIG. May be shifted and transmitted to the wiring 68 independently. Alternatively, the speed information may be sent to the motor module L at a frequency different from the signal having the header part and the data part. The speed information may be different in phase and frequency from the signal having the header portion and the data portion, or may have a code for error correction. Here, the wiring may be wireless as long as it includes not only wires and coaxial cables but also optical fibers and the like and can communicate data and the like.

Hereinafter, an example of a control method when the sensor S is connected to the motor module L of the control system 59 or 69 will be described.
The flow speed of the semi-finished product basically matches the speed information obtained from the encoder 56. Assuming that the speed information is represented by a speed signal composed of pulses that are output every time the semi-finished product moves by a predetermined distance, as shown in FIG. 14, when the speed signal (pulses) reaches a predetermined number, the CPU 51 or CPU64 generates a timing signal AT _1, AT _2, based on the relationship information and the timing signal AT _1, AT ₂ or timing signal AT _1, AT ₂ and related information, the phase and speed of the rotating body is a predetermined value Thus, a rotation signal is generated.
For example, the CPU 51 (or the CPU 64) controls the machining unit to reach the work area at a predetermined peripheral speed in accordance with the timing signal.

By the way, when the semi-finished product is stretched or shrunk, the flow rate of the semi-finished product may not coincide with the velocity information locally. In order to cope with such a local shift, the phase and speed of the rotating body may be controlled based on the expansion / contraction information of the semi-finished product. An example of a method for controlling the rotator by correcting such delay and advance of the semi-finished product will be described.
This method corrects delay and advance by generating a timing signal when a predetermined number of speed signals are generated from the interval signal generated by the sensor S or when a predetermined time has elapsed from the interval signal. It is.

The sensor S can detect the reference point of the semi-finished product marked on the semi-finished product. The reference points may be pre-marked on the semi-finished product at equal intervals, or the edge of the cut semi-finished product, or an attached part, such as a tape, may be used as the reference point, or it was cut off during the manufacturing process. It may be written on a part or a part that will not eventually become an article. This is because the mark is not left on the article in the end. Further, the mark may be recognized other than visible light.
When the sensor S arranged at a predetermined location of the manufacturing apparatus detects the reference point, the interval signals T ₁ , T ₂ , T ₃ are sent to the CPU 64. On the other hand, the control unit 50 sends a speed signal which is speed information from the encoder 56 to the CPU 64. When the CPU 64 counts a predetermined number G of speed signals after receiving the interval signals T ₁ , T ₂ , T ₃ , it generates timing signals CAT ₁ , CAT ₂ . In accordance with at least the timing signals CAT ₁ and CAT ₂ , a rotation signal is generated so that the phase and speed of the rotating body have a predetermined value so that the processing unit reaches the work area at a predetermined peripheral speed.
When the line speed is constant, the timing signals CAT ₁ and CAT ₂ may be generated after a predetermined period D has elapsed after receiving the interval signals T ₁ , T ₂ and T ₃ .
The CPU 64 can know the rotation speed and rotation position (phase) of the servo motor 61. For example, the servo motor 61 may have an encoder, the CPU 64 may monitor the rotation signal, and the rotation speed and rotation position of the servo motor 61 may be estimated from the rotation signal. The amplified signal applied to the servo motor 61 may be monitored, and the rotational speed and rotational position of the servo motor 61 may be estimated from the signal.

In the next method, the timing signals CAT ₁ and CAT ₂ are corrected based on the expansion / contraction information of the semi-finished product, and the position or timing at which the semi-finished product is processed is corrected by the corrected timing signals CCT ₁ and CCT ₂ . Is.
The expansion / contraction information of the semi-finished product may be generated based on a speed signal measured between the interval signals T1, T2, T3 and a reference speed signal generated between the interval signals T1, T2, T3. . For example, the expansion / contraction information of the semi-finished product may be generated based on a speed signal measured during the interval signal and a reference value. Specifically, the expansion / contraction information may be obtained by a ratio between the number of pulses of the speed signal measured during the interval signal and the reference number of pulses.

Let STP be the average number of pulses of the speed signal generated during the interval signal. The average pulse number STP may be determined in advance, or an actually measured value may be used. In FIG. 15, the number of velocity signals generated between the interval signals T ₁ and T ₂ is CP _1, and the number of velocity signals generated between the interval signals T ₂ and T ₃ is CP ₂ . In the above-described method, a predetermined number G of speed signals are counted from the interval signals T ₁ and T ₂ , but in this method, the predetermined number G is corrected by the expansion / contraction information.
For example, after a speed signal of G × CP ₁ / STP is counted from the interval signal T ₁ , the timing signal CCT ₁ is generated. Similarly, after the speed signal of G × CP ₂ / STP is counted from the interval signal T ₂ , the timing signal CCT ₂ is generated. If G × CP ₁ / STP is not an integer, G × CP ₁ / STP may be rounded, rounded up, or down to make it an integer, or corresponds to G × CP ₁ / STP between speed signals. The time may be calculated by the CPU 64, and the timing signal may be generated at that time.
Similarly, the predetermined period D may be corrected by the expansion / contraction information. For example, the timing signals CCT ₁ and CCT ₂ may be generated after a predetermined period D × CP ₁ / STP has elapsed after receiving the interval signals T ₁ and T ₂ .

Next, when the semi-finished product is shrunk, a hole is made in the semi-finished product at a predetermined rotation speed by the rotating body, and when the semi-finished product in which the hole is made is in a normal state, the hole made in the semi-finished product Is larger than a hole that is opened when the semi-finished product is not shrunk. For this reason, it is preferable to correct so that the size of the hole is as accurate as possible.
Hereinafter, an example will be described in which the peripheral speed v (θ) of the processed portion in the work area is corrected based on the above-described expansion / contraction information when the semi-finished product extends or contracts in the flow direction.

  When the rotating body is a trim cutter and the processed part is a loop-shaped blade, the length cut in the flow direction by the trim cutter is changed according to the expansion / contraction information. For example, when the number of velocity signals generated between the interval signals is smaller than the average number STP of velocity signals generated between the interval signals, it is considered that the semi-finished product sections corresponding to the interval signals T1, T2, and T3 are contracted. It is done. In such a case, the trim cutter rotates at a speed faster than the speed v (θ) for making a hole in a normal semi-finished product, so that the time for the trim cutter to contact the semi-finished product is shortened, and the trim cutter is in a contracted state. Makes it possible to make short holes in the flow direction.

Here, assuming that the number of speed signals between the interval signals T1, T2 and T3 is CP and the average number is STP, the peripheral speed of the trim cutter in the work area may be v (θ) × CP / STP. . Conversely, the same applies to the case where the section corresponding to the interval signal is extended.
In addition, when an interval signal is not emitted from the sensor S for some reason, or when the CPU 64 or the like does not receive an interval signal, the interval is determined by an estimation method such as a least square method or a maximum likelihood estimation method based on the previous interval signal. A signal may be generated. Further, the interval of the previous interval signal may be used as the interval of the current interval signal. Further, the interval signal of the sensor S may be observed by an observer. Such signal compensation may be applied to a signal generated by a signal generation source other than the sensor S, such as an encoder.

  The signal from the sensor S may be transmitted to a motor module L that is not directly connected to the sensor S. This is because the expansion / contraction information and the like can be shared with other motor modules L. If such information can be shared, even if the sensor S is not directly connected to the motor module L, the motor module L can know that a section of the semi-finished product is expanding and contracting. Further, since the distance (for example, the number of speed signals) between the motor module L to which the sensor S is directly connected and the motor module L to which the sensor S is not directly connected is determined in advance, the sensor S is directly connected. It is a motor module L which is not performed, and the above-described method can be performed. For example, the distance between the position where the sensor S is arranged and the motor module L that requires information on the sensor S is known and registered in the memory 52 or 63 in advance. Based on information such as the time when the information was obtained, even in the motor module L to which the sensor S is not directly connected, the phase of the processed part of the rotating body, the peripheral speed, or both are corrected using the expansion / contraction information. can do.

  The rotating body may not be directly rotated by a servo motor or the like. For example, the main motor may be rotated at a substantially constant rotational speed, and the power may be transmitted to the rotating body via the differential device. That is, a servo motor or the like may change the phase of the rotating body, the rotational speed of the rotating body, or both through the differential device.

  An example of the differential device is a planetary gear device. The planetary gear device includes a sun gear, a plurality of planetary gears, an internal gear, and a carrier. A sun gear and a plurality of planetary gears are arranged inside the internal gear, the plurality of planetary gears and the internal gear mesh with each other, and the plurality of planetary gears are also rotated by the internal gear. Center axes of the plurality of planetary gears are rotatably attached to the carrier, and the plurality of planetary gears rotates around the sun gear, so that the carrier also rotates. Here, the power of the main motor is transmitted to the sun gear, and the rotating body rotates by the rotation of the carrier. The peripheral speed of the rotating body may be changed by controlling the rotation of the internal gear via the worm and the worm wheel by the servo motor.

Example 2 will be described below. 9 to 12 show a second embodiment.
FIG. 9 is a diagram illustrating an example of a manufacturing apparatus for manufacturing an article. Specifically, the manufacturing apparatus 29 can manufacture a pants-type diaper that is a kind of worn article.
The manufacturing apparatus 29 includes a first cutter unit 20 that cuts the mat W _m , a first seal unit 21 that seals the end of the composite body in which another web is arranged on the cut mat, and a portion between the seal portions. A second cutter unit 22 for cutting the elastic member Wf and a guide unit 23 for guiding and introducing the elastic member Wf between the webs W.

Further, the manufacturing apparatus 29 has the second seal unit 24 that seals the web W into which the elastic member Wf is introduced and the composite, the trim cutter unit 25 that opens holes for legs in the sealed web, and the holes. A folding unit 26 that folds the object in two, a third sealing unit 27 that seals the boundary of the semi-finished product, and a third cutter unit 28 that cuts between the sealing portions and cuts them into articles are provided.
At least one of the first to third cutter units 20, 22, 28, the first to third seal units 21, 24, 27 and the trim cutter unit 25 includes a variable speed rotating body as described above. Yes. For this reason, in a unit having a rotating body capable of changing the speed, it is not necessary to replace the rotating body even when the size of the article is changed.

  FIG. 10 shows an example of the guidance unit 23. The guide unit 23 shown in FIG. 10 is provided on the first and second sliders 33 and 34 that can move along the guide shaft 32, the first guide portion 35 provided on the first slider 33, and the second slider 34. The second guide portion 36 is provided. A first shaft 38 is fixed to the first slider 33, and a second shaft 39 is fixed to the second slider 34.

When the first shaft 38 reciprocates, the first slider 33 moves along the guide shaft 32, and when the second shaft 39 reciprocates, the second slider 34 moves along the guide shaft 32. . The first shaft 38 may be hollow, and the second shaft 39 may reciprocate in the first shaft 38.
In order to reciprocate the shafts 38 and 39, it is necessary to convert the rotational motion of the motor into reciprocating motion. For example, the rotational motion may be converted into a reciprocating motion by a crank mechanism. Further, a rotational motion may be converted into a reciprocating motion using a mechanism such as a ball screw.

The guide parts 35 and 36 reciprocate substantially in the axial direction of the rotation axis of the nip roll 31 to place the elastic member Wf at a predetermined position on the web. That is, the elastic member Wf can be disposed at a desired position by the operation of the guide portions 35 and 36.
The pair of nip rolls 31, 31 sandwich at least one web W and the elastic member Wf led out from the lead-out portions 35 a, 36 a located substantially at the front ends of the first and second guide portions 35, 36. The lead-out portions 35a and 36a are preferably arranged in the vicinity of the pair of nip rolls 31 and 31. The radius of at least one of the nip rolls 31 may be 10 mm to 50 mm. An adhesive is applied intermittently or continuously to at least one of the webs W.

  In the guide unit 23 shown in FIG. 10, since the sliders 33 and 34 move on the same track, they cannot cross each other. However, since the derivation units 35a and 36a can move along different tracks by the guide units 35 and 36, the derivation units 35a and 35b can be crossed.

When the reciprocating motion of the sliders 33 and 34 is performed by a mechanical element such as a cam mechanism, the cam must be replaced every time the size of the article is changed. However, since the sliders 33 and 34 can be reciprocated by a motor as described above, the positions of the sliders 33 and 34 can be controlled by the control systems 59 and 69, and the size of the article is changed. However, it is not necessary to replace the cam.
Further, instead of the guide unit 23 shown in FIG. 10, a guide unit 40 shown in FIG. 11 may be used.

The guide unit 40 includes first attachment means 43 and second attachment means 44.
The first attachment means 43 has a belt 45 that is stretched between a pair of pulleys 45a, and a first guide portion 35 that guides at least one elastic member Wf to the vicinity where the nip rolls 31 and 31 are in contact. Yes.
The second attachment means 44 includes a belt 46 that is stretched between a pair of pulleys 46a, and a second guide portion 36 that guides at least one elastic member Wf to the vicinity where the nip rolls 31 and 31 are in contact. Yes.
At least one of the pair of pulleys 45a is rotationally driven by a servo motor (not shown). Similarly, at least one of the pair of pulleys 46a is rotationally driven by a servo motor (not shown). By the rotation of the servo motor, the first and second moving devices 43 and 44 reciprocate the first and second guide portions 35 and 36 in the direction across the web W.

An example of the relationship between the speed of the first guide part 35 and one cycle in which the first guide part 35 arranges the elastic member Wf in one section is shown in FIG. In FIG. 12, the maximum and minimum speeds of the first and second guide portions 35 and 36 are about ± 10 m / s. Since the maximum and minimum speeds vary depending on the type of servo motor, the maximum and minimum speeds can be set to about ± 20 m / s depending on the type of servo motor and the like.
With this control, the first and second moving devices 43 and 44 can be controlled by the control systems 59 and 69 even in the guide unit 40, and the cam can be replaced even if the size of the article is changed. It becomes unnecessary. In the guide units 23 and 40, the rotational speed and phase of the servo motor may be corrected by the expansion / contraction information. When the elastic member Wf is fixed to one web, the surface of one nip roll may be coated with a material having good peelability.

Example 3 will be described below. 16 and 17 show a third embodiment.
FIG. 16 is a diagram illustrating an example of a manufacturing apparatus for manufacturing an article.
Manufacturing apparatus 130 includes a guide portion 134 for guiding the elastic member Wf between the webs W _1, W _2, the nip roll 131 and the assembly drum 8 for bonding sandwich the elastic member Wf between the webs W _1, W _2, transport A re-pitch drum 132 that receives the mat Wm from the section 133 and can change the interval between the mats Wm. In assembly drum 8, the mat Wm is placed on the elastic member Wf of the web W _1, W ₂ disposed in a predetermined shape. An adhesive is intermittently or continuously applied to at least one of the webs W ₁ and W ₂ . The nip roll 131 has a smaller diameter than the assembly drum 8 around which the web W ₂ is wound. Further, if the nip roll 131 has releasability with respect to the adhesive, the cost of the article can be reduced by omitting the web W ₁ . In the first and second embodiments described above, an elastic member may be disposed on one web. In that case, it is preferable that at least one of the nip rolls has peelability with respect to the adhesive. The nip roll may be wound with an elastic body such as rubber.

When the peripheral speed of the assembly drum 8 is set to v _1, the peripheral speed of the conveyor 133 and v _2, repitch drum 132 receives the mat Wm in a substantially velocity v _2, to release the mat Wm at substantially the speed v ₁ Is preferred. The re-pitch drum 132, the transport unit 133, or both of them may suck the mat Wm on the surface of the drum by suction.

FIG. 17 shows an example in which the speed of the re-pitch drum 132 changes while the re-pitch drum 132 rotates once. The re-pitch drum 132 is a second work area (an area where the re-pitch drum receives a member) located near the transport unit 133. When receiving the mat Wm, the re-pitch drum 132 has a circumferential speed of approximately ₂ as an assembly. In the first work area (area where the re-pitch drum delivers the member) located near the drum 8, when the mat Wm is delivered, the peripheral speed of the re-pitch drum 132 is set to a substantially speed v ₁ . In the example shown in FIG. 17, three cycles of work are performed while the re-pitch drum 132 rotates once.
By using such a re-pitch drum 132, the interval between members can be changed. For this reason, even if the size of the article changes, the mat Wm or the like can be arranged at a predetermined position.
The re-pitch drum 132 may be controlled by the control systems 59 and 69 described above. Moreover, even if the size of the article changes, the guide unit 134 can be applied to any size by being controlled by the control systems 59 and 69. Further, when the mat that is one of the semi-finished products is contracted, the re-pitch drum 132 may receive the mat at a speed slightly higher than the peripheral speed of the transport unit 133. Thereby, it is also possible to correct the shrinkage of the mat.

As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification.
For example, the rotating body may be coupled to the rotating body via a speed reducer or a speed increaser such as a gear.
Further, as a cutter for forming the leg hole, a laser cutter may be provided in the guide portion, and these cutters may be driven and controlled according to the size like the guide portion.
That is, the laser cutter may be attached, for example, instead of the arms 35 and 36 in FIGS. When making a hole in a web using such two guide parts, alignment of the start and end of cutting becomes a problem. For example, it is possible to make a hole in the web by operating the laser cutter so that the start and end of cutting cross. In addition, it is possible to prevent cutting failure by opening a hole of a predetermined size in advance and setting the hole at the start and end positions. Here, the hole having a predetermined size is preferably smaller than a hole cut by a laser and larger than an error when two laser cutters are irradiated to one point. Although the laser cutter has been described above, a structure similar to that of the laser cutter can be adopted for the water jet cutter and the hot air cutter.
Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.

The invention's effect:
As described above, according to the present invention, since the peripheral speed of the rotating body changes according to the size of the article, replacement of the unit including the rotating body can be suppressed as much as possible. For this reason, the operation rate of the apparatus is improved.

  Moreover, a favorable processing state can be maintained by setting the peripheral speed during processing to a predetermined speed.

Also, in the present invention can, depending on the expansion and contraction of the semi-finished product, to adjust the position for working semi-finished product.

It is a conceptual diagram of the roll for demonstrating operation | movement of the roll concerning this invention. It is the numerical formula and characteristic figure which show the example of the operation characteristic of the processing section. It is the numerical formula and characteristic figure which show the example of the operation characteristic of the processing section. (A), (b) is the numerical formula and characteristic figure which show the example of the operation characteristic of a process part, (c), (d) is a top view which shows the size of a semi-finished product. It is a schematic layout drawing of the manufacturing apparatus concerning Example 1 of this invention. It is a schematic side view which shows an example of a process unit. It is a side view which shows an example of the cutter unit of a leg hole. It is a schematic block diagram which shows a control structure. It is a schematic perspective view of the manufacturing apparatus concerning Example 2 of this invention. It is a front view which shows the apparatus for arrange | positioning an elastic member. It is a perspective view which shows the other example of the same apparatus. It is a characteristic view which shows the change of the speed of a 1st guide part. It is a graph which shows a part of structure of the memory | storage part of the manufacturing apparatus concerning Example 2 of this invention. It is a timing chart which shows the control method by the apparatus. It is a timing chart which shows the other control method of a manufacturing apparatus. It is a schematic side view of the manufacturing apparatus concerning Example 3 of this invention. It is a characteristic view which shows the speed change of the same pitch drum.

Explanation of symbols

1, 1A, 1B: Processing part 2, 2A, 2C, 2D: Roll 35, 36: Guide part 51: CPU (control means)
52: Memory (storage unit)
α: When processing β: When not processing

Claims (2)

Including a processing step in which the processing unit adds processing to the web by rotating the rotating body,
Wherein the during the processing of one cycle by the rotary member varying the peripheral speed of the rotating body, a first size and a first size can be manufactured articles of larger second size than articles manufacturing method of And
One cycle of the rotating body includes a work area in which the processed part processes a semi-finished product and a non-work area in which the processed part does not process a semi-finished product,
Wherein the rotating body in the case of producing the article of the first size is compared with the time T _M required for one rotation, the rotating body in the case of producing an article of the second size is more time T _L necessary for the rotation 1 When manufacturing an article having a long length and the second size, the peripheral speed of the processing section is set to a first speed that approximates the flow speed of the web in the working area, while the processing section is used in the non-working area. The average peripheral speed is a second speed smaller than the flow speed,
Thereby, an article of a second size larger than the first size is processed,
Generating stretch information of the web;
A step of correcting the time when the processing unit reaches the work area based on the expansion / contraction information ,
A measurement point of the web is detected by a sensor, an interval signal is output based on the detection of the measurement point, and is measured between a plurality of the interval signals, and is output every time the semi-finished product moves a predetermined distance. A method for manufacturing an article, wherein the web expansion / contraction information is generated by a ratio between a pulse number of a speed signal composed of pulses and a reference pulse number . Including a processing step in which the processing unit adds processing to the web by rotating the rotating body,
By varying the peripheral speed of the rotating body in the course of one cycle of processing by the rotary member, a first size and a first size can be manufactured articles of smaller third size than articles manufacturing method of And
One cycle of the rotating body includes a work area in which the processed part processes a semi-finished product and a non-work area in which the processed part does not process a semi-finished product,
Wherein the rotating body in the case of producing the article of the first size is compared with the time T _M required for one rotation, the rotating body in the case of producing an article of the third size is more time T _S necessary for the rotation 1 When manufacturing an article having a short size and the third size, the peripheral speed of the processing section is set to a first speed that approximates the flow speed of the web in the working area, while the processing section is used in the non-working area. The average peripheral speed is a third speed larger than the flow speed,
Thereby, an article of a third size smaller than the first size is processed,
Generating stretch information of the web;
A step of correcting the time when the processing unit reaches the work area based on the expansion / contraction information ,
A measurement point of the web is detected by a sensor, an interval signal is output based on the detection of the measurement point, and is measured between a plurality of the interval signals, and is output every time the semi-finished product moves a predetermined distance. A method for manufacturing an article, wherein the web expansion / contraction information is generated by a ratio between a pulse number of a speed signal composed of pulses and a reference pulse number .

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