JP6975645B2 - Manufacturing method and manufacturing equipment for sheet-shaped members related to absorbent articles - Google Patents

Description

The present invention relates to a method for manufacturing a sheet-shaped member relating to an absorbent article such as a disposable diaper, and a manufacturing apparatus.

Conventionally, in the production of disposable diapers known as absorbent articles that absorb excrement such as urine, a single-cut sheet-like member 30'as shown on the left side of the schematic plan view of FIG. 1A is used. That is, a single sheet-shaped member 30'having high stretchable regions AH'and AH', which have higher elasticity than the low stretchable region AL', is used at positions on both sides of the low stretchable region AL'in the lateral direction. Will be done. Then, the sheet-shaped member 30'is generated as follows, for example.

As shown in the right part of FIG. 1A, first, the continuous body 34a'of the base material sheet related to the sheet-shaped member 30'is conveyed in the same direction as the conveying direction while being continuous in the lateral direction. Then, between the pair of facing surfaces of the continuous body 34a', the continuous body 35a' of the elastic member continuous in the transport direction is arranged in a state of being extended in the same direction. At this time, the continuous body 35a'of the elastic member adheres to the continuous body 34a'of the base material sheet in the region AH1'corresponding to the high stretchable region AH' (hereinafter, also referred to as the high stretchable region AH1'). Although it is fixed with an agent, it is not fixed with an adhesive in the region AL1'corresponding to the low elasticity region AL'(hereinafter, also referred to as the low elasticity region AL1').

Next, at the predetermined position PC1'in the transport direction in the low expansion / contraction corresponding region AL1', the continuous body 35a'of the elastic member is cut by a cutter blade (not shown), whereby the downstream side from the predetermined position PC1' The intermediate body 35m'of the elastic member is separated and generated at the position of, and a new downstream end portion 35aed'of the continuous body 35a'of the elastic member is generated on the upstream side of the predetermined position PC1'. Further, at this time, the upstream end portion 35meu'of the intermediate body 35m'of the former elastic member contracts toward the highly stretchable region AH1' located on the downstream side thereof, and the latter continuous body 35a of the elastic member is contracted. The downstream end portion 35aed of'is contracted toward the high elasticity corresponding region AH1' located on the upstream side thereof. As a result, the elastic member does not exist in the low expansion / contraction corresponding region AL1', and as a result, the low expansion / contraction region AL'is formed in the same region AL1'.

Then, the continuous body 34a'of the base sheet and the intermediate body 35m' of the elastic member are cut at the cutting target position PC'between the high expansion / contraction corresponding regions AH1'and AH1' adjacent to each other in the transport direction. Then, based on the elastic members 35'and 35' generated by cutting, the sheet-shaped member 30 having a high expansion / contraction region AH'and AH' on both sides of the low expansion / contraction region AL' as described above, respectively. 'Is generated.

On the other hand, when the elastic member 35'is attached with an adhesive as described above, the elasticity of the elastic member 35', that is, the elasticity is hindered due to the curing of the adhesive existing on the outer peripheral surface of the elastic member 35'. There is a fear. Therefore, recently, it has been studied to attach the elastic member 35'to the base material sheet 34'related to the sheet-like member 30' without using an adhesive, and as an example of the method, Patent Document 1 describes the following. Such a method is disclosed.

First, as shown in the schematic plan view of FIG. 1B, in the continuous body 34a'of the base sheet continuous in the transport direction, the continuous body 35a'of the elastic member continuous in the transport direction between the pair of facing surfaces facing each other. Is inserted in a state of being extended in the transport direction.

Next, a plurality of joints j'that join the pair of facing surfaces are formed at intervals in the transport direction. At this time, the joints j'are continuously formed in the CD direction that intersects the transport direction. It is formed at positions on both sides of the body 35a'.

Then, the continuous body 34a'of the base material sheet and the continuous body 35a'of the elastic member are cut at the cutting target position PC'in the transport direction in the continuous body 34a'of the base material sheet, as shown in FIG. 1C. A single-cut base sheet 34'attached to the elastic member 35'is generated. That is, based on this cutting, the cut elastic member 35'try to expand in the CD direction while contracting in the transport direction, but here, the expansion of the elastic member 35'in the CD direction is performed on both sides in the CD direction. The joints j'and j'located in the joints are restricted to each other, whereby the elastic member 35'is substantially sandwiched between the joints j'and j'in the CD direction. As a result, the elastic member 35'is attached to the base sheet 34'.

Special table 2001-504899

Here, when these two techniques are combined, the sheet-like member 30'having the high expansion / contraction region AH', AH'and the low expansion / contraction region AL'is flexible and the elasticity of the elastic member 35'is inhibited. Can be generated as not.

However, when combined, the positions where the joints j'and j'are formed in the base sheet continuum 34a'and the positions of the cutter blades that cut the elastic member continuum 35a' are elastic, respectively. If the members deviate from the proper position with respect to the continuum 35a', the sheet-shaped member 30' as described above cannot be generated.

For example, when the position of the former joint portion j deviates from the proper position in the CD direction, when the elastic member 35'shrinks in the transport direction as shown in FIG. 1C, the elastic member 35'is joined to the joint portion j'. , J'is sandwiched between the base sheets 34'and cannot be attached to the base sheet 34'. Further, when the position of the latter cutter blade deviates from the proper position in the CD direction, the continuous body 35a'of the elastic member may fail to be cut at the cutting position PC1'in FIG. 1A.

Regarding this point, for example, the continuous body 34a'is wound around the outer peripheral surface of a rotating body (not shown) that rotates along the transport direction of the continuous body 34a'of the base material sheet, and the joint portion j is formed on the outer peripheral surface. If both a convex portion (not shown) for compression formation and the cutter blade for cutting the continuous body 34'of the elastic member are provided, it is easy to set both positions at appropriate positions. Conceivable. That is, if these convex portions and the cutter blade are provided in advance so as to have an appropriate relative positional relationship, at least one of the positions is an appropriate position with respect to the continuous body 35a'of the elastic member. It is considered that the other position is inevitably the proper position. As a result, while suppressing the joint portions j and j from failing to pinch the elastic member 35'from the CD direction, it is also possible to suppress the cutter blade from failing to cut the continuous body 35a'of the elastic member. It is considered to be.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to prevent the joint portion from failing to press the elastic member from the CD direction and to use a cutter blade for the elastic member. It is also to suppress the failure to cut the continuum.

The main invention for achieving the above object is
A method for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable regions at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is transported with the predetermined direction as the transport direction. In the arrangement step of arranging the continuum of the above in a state of being extended in the transport direction,
A winding transfer step of winding and transporting the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body rotating along the transport direction.
After the winding transfer step, the continuous body of the base material sheet is cut at a cutting target position set at a predetermined pitch in the transfer direction to generate a base material sheet of the sheet-like member. Have,
In the winding transfer step, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
A continuous body of the base material sheet is wound around the outer peripheral surface with a predetermined length on the upstream side in the rotation direction of the rotating body from the cutting position in the cutting step.
At the time of cutting in the cutting step, the region corresponding to the highly stretchable region in which the joint portion is not formed is located on the upstream side in the rotational direction of the rotating body.
In the generation step, an intermediate body of the elastic member is also cut at the cutting target position to generate an elastic member to be attached to the base sheet, and after the generation step, the elastic member is contracted in the transport direction. The elastic member expanded in the CD direction is in the form of a sheet according to an absorbent article, which is sandwiched between the joint portions on both sides of the CD direction in the CD direction and attached to the base material sheet. It is a method of manufacturing a member.
again,
An apparatus for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable region at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is conveyed in the predetermined direction. An arrangement device for arranging the continuum of the above in an extended state in the transport direction,
A winding transport device that winds and transports the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body that rotates along the transport direction.
The base of the sheet-like member is formed by cutting the continuous body of the base material sheet at a position downstream of the winding transport device in the transport direction at a cutting target position set at a predetermined pitch in the transport direction. It has a generator that produces a material sheet, and
In the winding transfer device, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
A continuous body of the base material sheet is wound around the outer peripheral surface with a predetermined length on the upstream side in the rotation direction of the rotating body from the cutting position in the cutting step.
At the time of cutting in the cutting step, the region corresponding to the highly stretchable region in which the joint portion is not formed is located on the upstream side in the rotational direction of the rotating body.
The generator also cuts an intermediate of the elastic member at the cutting target position to generate an elastic member to be attached to the base sheet, and on the downstream side of the generator in the transport direction, the elastic member is generated. The elastic member that contracts in the transport direction and expands in the CD direction is characterized in that the elastic member is sandwiched between the joint portions on both sides of the CD direction in the CD direction and attached to the base sheet. It is an apparatus for manufacturing a sheet-shaped member related to an absorbent article.
Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

According to the present invention, it is possible to prevent the joint portion from failing to pinch the elastic member from the CD direction, and also to prevent the cutter blade from failing to cut the continuous body of the elastic member.

It is explanatory drawing of the generation method of the sheet-like member 30' in the form of a single sheet having a low expansion / contraction region AL'and a high expansion / contraction region AH', AH'. It is explanatory drawing of the method of attaching the elastic member 35'to the base material sheet 34'related to the sheet-like member 30' without using an adhesive. It is the same explanatory diagram. It is a schematic perspective view of a 3-piece type diaper 1 as an example of an absorbent article. It is a schematic plan view of the diaper 1 in the unfolded state as seen from the skin side of the wearer. FIG. 3 is a sectional view taken along line IVa-IVa and a sectional view taken along line IVb-IVb in FIG. FIG. 3 is a schematic plan view of the ventral band member 31 in the unfolded state as viewed from the non-skin side. 6A and 6B are explanatory views of the attachment function of the rubber thread 35 (45) played by the welded portion j. 7A to 7C are explanatory views of a method of forming the non-stretchable region AL on the ventral band member 31 (45) and forming the stretchable regions AH and AH on both sides of the non-stretchable region AL in the lateral direction. It is a schematic plan view which shows the state that the diaper 1 is manufactured on a production line by a partial perspective. It is a schematic enlarged view of the part A in FIG. It is a schematic enlarged view of the part B in FIG. It is explanatory drawing of the processing performed at the 2nd processing position PK2, and is the schematic side view of the ultrasonic welding apparatus 60 and the like which form the main apparatus of the processing processing as seen from the CD direction. It is a schematic enlarged view of the arrow view of BB in FIG. 10A. It is a schematic plan view which shows the outer peripheral surface 61as of the anvil roll 61a which concerns on the apparatus 60 developed in the rotation direction Dc61a. It is explanatory drawing of the processing performed at the 2nd processing position PK2. It is explanatory drawing in the case where a plurality of cutter blades 61ac are arranged for each continuous body 35a of the thread rubber in the non-convex region AN61at of the outer peripheral surface 61as of the anvil roll 61a. FIG. 14A is an explanatory diagram of a preferable arrangement position of the cutter blade 61ac in the non-convex region AN61at, and FIG. 14B is an explanatory diagram of a preferable position of the cutting position PC1 in the non-expandable region AL1. It is explanatory drawing when the 2nd welding part j2 is formed in the non-stretchable region AL1.

The description of this specification and the accompanying drawings will clarify at least the following matters.
A method for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable regions at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is transported with the predetermined direction as the transport direction. In the arrangement step of arranging the continuum of the above in a state of being extended in the transport direction,
A winding transfer step of winding and transporting the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body rotating along the transport direction.
After the winding transfer step, the continuous body of the base material sheet is cut at a cutting target position set at a predetermined pitch in the transfer direction to generate a base material sheet of the sheet-like member. Have,
In the winding transfer step, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
In the generation step, an intermediate body of the elastic member is also cut at the cutting target position to generate an elastic member to be attached to the base sheet, and after the generation step, the elastic member is contracted in the transport direction. The elastic member expanded in the CD direction relates to an absorbent article characterized in that it is sandwiched between the joint portions on both sides of the CD direction in the CD direction and attached to the base material sheet. This is a method for manufacturing a sheet-shaped member.

According to the method for manufacturing a sheet-shaped member related to such an absorbent article, the convex portion related to the formation of the joint portion and the cutter blade related to the cutting of the continuous body of the elastic member are formed on the outer peripheral surface of the rotating body. It is provided in. Therefore, by preliminarily providing these convex portions and the cutter blades at predetermined appropriate positions on the outer peripheral surface thereof, it is appropriate to press the elastic member from both sides in the CD direction after the above generation step. It becomes easy to form the joint portion at the position, and it becomes easy to cut the continuous body of the elastic member. As a result, it is possible to prevent the joint portions from failing to press the elastic members from the CD direction, and it is also possible to prevent the cutter blade from failing to cut the continuous body of the elastic members.

A method for manufacturing a sheet-like member according to such an absorbent article.
At a predetermined position in the rotation direction of the rotating body, a position where both the joint forming step and the cutting step are performed is set.
The cutting position for cutting the continuous body of the elastic member with the cutter blade in the region corresponding to the low expansion / contraction region is located upstream of the center position in the transportation direction in the region corresponding to the low expansion / contraction region. It is desirable that it is located.

According to the method for manufacturing a sheet-shaped member related to such an absorbent article, the cutting position for cutting the continuous body of the elastic member with the cutter blade is upstream from the central position in the transport direction in the region corresponding to the expansion / contraction region. Located on the side. Therefore, as compared with the case where the cutting position is located on the downstream side of the central position, it corresponds to the highly stretchable region located on the upstream side of the cutting position immediately after cutting the continuous body of the elastic member. The joint can be formed in the region. The joints are provided on both sides of the continuous body of the elastic member in the CD direction. Therefore, the downstream end of the continuous body of the elastic member that is located upstream of the cutting position and contracts upstream can be immediately pressed at the joint and attached to the continuous body of the base sheet. .. As a result, it is possible to suppress a problem that may occur when the time from the cutting to the formation of the joint portion is long, that is, the problem that the relaxation of the stretched state of the continuous body of the elastic member is greatly propagated to the upstream side. be able to. As a result, even after cutting the continuous body of the elastic member, it becomes easy to maintain the stretched state of the continuous body of the elastic member located on the upstream side of the cutting position at substantially the same level as the stretched state before cutting. ..

A method for manufacturing a sheet-like member according to such an absorbent article.
The cutter blade is arranged on the outer peripheral surface of the rotating body so as to correspond to only one position in the transport direction in the region corresponding to the low expansion / contraction region for one continuous body of the elastic member. desirable.

According to the method for manufacturing a sheet-shaped member according to such an absorbent article, the cutter blade is made of the rotating body so as to correspond to only one position in the transport direction in the above region with respect to the continuous body of one elastic member. It is arranged on the outer peripheral surface. Therefore, a defect that may occur when the cutter blades are arranged corresponding to a plurality of positions in the transport direction for one continuous body of elastic members, that is, damage to the continuous body of the base sheet due to cutting of the cutter blades. It is possible to suppress the problem that the degree becomes large.

A method for manufacturing a sheet-like member according to such an absorbent article.
It is desirable that the cutter blade is arranged on the outer peripheral surface of the rotating body so as to correspond to a plurality of positions in the transport direction in the region corresponding to the low expansion / contraction region for one continuous body of the elastic member. ..

According to the method for manufacturing a sheet-shaped member according to such an absorbent article, the cutter blade is the outer periphery of the rotating body so as to correspond to a plurality of positions in the transport direction in the above region with respect to the continuous body of one elastic member. It is placed on the surface. Therefore, even if one cutter blade fails to cut the continuous body of the elastic member, the other cutter blade can cut the continuous body of the elastic member. As a result, the continuous body of the elastic member can be cut more reliably.

A method for manufacturing a sheet-like member according to such an absorbent article.
A position for performing the cutting step is set at a predetermined position in the rotation direction of the rotating body.
It is desirable that the pressing roll that presses the continuous body of the base material sheet wrapped around the outer peripheral surface of the rotating body toward the outer peripheral surface is arranged at a position upstream of the predetermined position in the rotational direction. ..

According to the method for manufacturing a sheet-shaped member related to such an absorbent article, first, by cutting the continuous body of the elastic member, the downstream end portion of the continuous body of the elastic member is newly placed on the upstream side of the cutting position. Is formed in. Further, the downstream end portion can be contracted to the upstream side, but here, according to the above-mentioned pressing roll, the contraction of the downstream side end portion to the upstream side can be suppressed by the pressing. As a result, it is possible to prevent the downstream end portion from moving far to the upstream side beyond the boundary position between the region corresponding to the low expansion / contraction region and the region corresponding to the high expansion / contraction region.

In addition, the pressing also increases the sliding resistance between the pair of facing surfaces of the continuous body of the base sheet and the continuous body of the elastic member. Therefore, this also effectively contributes to the suppression of the movement of the downstream end portion.

A method for manufacturing a sheet-like member according to such an absorbent article.
When the joint is used as the first joint,
In the joint portion forming step, it is desirable to form a second joint portion for joining the pair of facing surfaces to each other in the region corresponding to the low expansion / contraction region by the second convex portion of the outer peripheral surface of the rotating body. ..

According to the method for manufacturing a sheet-like member related to such an absorbent article, a second joint portion for joining the pair of facing surfaces is formed in a region corresponding to a low expansion / contraction region. Therefore, it is possible to prevent the pair of facing surfaces from being separated from each other in the low expansion / contraction region. As a result, the sheet-shaped members can be integrated, and as a result, the strength of the sheet-shaped members can be improved.

A method for manufacturing a sheet-like member according to such an absorbent article.
In the joint portion forming step, the second joint portion is formed in the region corresponding to the low expansion / contraction region on the upstream side in the transport direction from the cutting position where the continuous body of the elastic member is cut by the cutter blade. , The second joint is formed at positions on both sides of the continuum of the elastic member in the CD direction, respectively.
The size of the distance in the CD direction between the second joints on both sides is larger than the size of the distance in the CD direction between the first joints on both sides, and the elastic member. It is desirable that the size of the continuum of the elastic member in the CD direction or less in the no-load state in which no external force acts on the continuum.

According to the method for manufacturing a sheet-shaped member according to such an absorbent article, after cutting the continuous body of the elastic member, the downstream end portion of the continuous body of the elastic member located on the upstream side of the cutting position is designated. While guiding toward one joint, it is possible to prevent the downstream end from moving beyond the first joint to the upstream side, making it impossible to pinch between the first joints. .. The details are as follows. First, after cutting the continuous body of the elastic member with the cutter blade, a downstream end portion of the continuous body of the elastic member is newly formed on the upstream side of the cutting position. Then, the downstream end portion contracts to the upstream side, and at this time, the second joint portions have an interval of the above-mentioned size between the CD directions of each other. Therefore, an appropriate sliding force acts from the second joints on the downstream end of the continuous body of the elastic member that contracts to the upstream side, whereby the momentum of the contraction to the upstream side is reduced. .. As a result, it is possible to prevent the downstream end portions from moving to the upstream side beyond the first joint portions.

A method for manufacturing a sheet-like member according to such an absorbent article.
At a predetermined position in the rotation direction of the rotating body, a position where both the joint forming step and the cutting step are performed is set.
At the predetermined position, a horn that ultrasonically vibrates toward the outer peripheral surface of the rotating body is provided.
When the convex portion of the outer peripheral surface of the rotating body passes through the predetermined position, the joint portion is formed by sandwiching the convex portion between the horn and the convex portion, and the outer peripheral surface of the rotating body is formed. It is desirable to cut the continuum of the elastic member by sandwiching the cutter blade between the horn and the cutter blade when the cutter blade passes through the predetermined position.

According to the method for manufacturing a sheet-shaped member related to such an absorbent article, the above-mentioned joint can be formed by ultrasonic welding, and the above-mentioned continuous body of the elastic member can be cut by an ultrasonic cutter. Can be done with. Therefore, it is possible to reliably perform the forming process of the joint portion and the cutting process of the continuous body of the elastic member.

again,
An apparatus for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable region at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is conveyed in the predetermined direction. An arrangement device for arranging the continuum of the above in an extended state in the transport direction,
A winding transport device that winds and transports the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body that rotates along the transport direction.
The base of the sheet-like member is formed by cutting the continuous body of the base material sheet at a position downstream of the winding transport device in the transport direction at a cutting target position set at a predetermined pitch in the transport direction. It has a generator that produces a material sheet, and
In the winding transfer device, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
The generator also cuts an intermediate of the elastic member at the cutting target position to generate an elastic member to be attached to the base sheet, and on the downstream side of the generator in the transport direction, the elastic member is generated. The elastic member that contracts in the transport direction and expands in the CD direction is characterized in that the elastic member is sandwiched between the joint portions on both sides of the CD direction in the CD direction and attached to the base material sheet. It is an apparatus for manufacturing a sheet-shaped member related to an absorbent article.

According to the apparatus for manufacturing the sheet-shaped member related to such an absorbent article, the same operation and effect as in the case of the above-mentioned manufacturing method can be obtained.

=== This embodiment ===
The method and apparatus for manufacturing a sheet-shaped member according to the absorbent article of the present embodiment are used, for example, in a disposable diaper 1 manufacturing line as an example of the absorbent article. FIG. 2 is a schematic perspective view of a three-piece type diaper 1 as an example of the diaper 1.

This diaper 1 has a "vertical direction", a "horizontal direction" orthogonal to the vertical direction, and a "front-back direction" orthogonal to the vertical direction and the horizontal direction in the pants-shaped state before wearing as shown in FIG. Have. Then, while wearing the diaper 1, the vertical direction is often oriented in the vertical direction. Therefore, in the following, the vertical direction is also referred to as "vertical direction".
In the vertical direction, the upper side corresponds to the wearer's waistline side, and the lower side corresponds to the wearer's inseam side. In the anteroposterior direction, the front side corresponds to the ventral side of the wearer, and the rear side corresponds to the back side of the wearer. Further, in the lateral direction, one side corresponds to the left side of the wearer and the other side corresponds to the right side of the wearer.

In the pants-type state of FIG. 2, the diaper 1 is located in the ventral band member 31 along the lateral direction and on the rear side of the ventral band member 31, and in collaboration with the ventral band member 31, in the vertical direction. It is provided with a dorsal band member 41 along the lateral direction for forming a waist circumference opening BH on the upper side, and an absorbent main body 10 as a crotch portion provided between the ventral band member 31 and the dorsal band member 41. There is. The absorbent main body 10 is positioned so as to project downward in the vertical direction from the ventral band member 31 and the dorsal band member 41.
Further, the lateral end portions 31e and 31e of the ventral band member 31 and the lateral end portions 41e and 41e of the corresponding dorsal band member 41 are joined by the side seal portion SS. As a result, the ventral band member 31 and the dorsal band member 41, together with the absorbent main body 10, form one leg opening LH and one LH on both sides in the lower and lateral directions, respectively.

FIG. 3 is a schematic plan view of the unfolded diaper 1 as viewed from the wearer's skin side. Further, FIG. 4 is a sectional view taken along line IVa-IVa in FIG. 3 as well as a sectional view taken along line IVb-IVb in FIG.

Here, the unfolded state means that the ventral band member 31 and the dorsal band member 41 are separated by breaking the joint of the above-mentioned side seal portions SS that the diaper 1 in the pants-shaped state of FIG. 2 has on both sides in the lateral direction. At the same time, by opening the diaper 1 in the vertical direction, the diaper 1 is unfolded on a plane.

Further, in this unfolded state, the diaper 1 is shown in a virtual state in which each member constituting the diaper 1 has no elasticity. For example, in this example, the diaper 1 is provided with a plurality of elastic members 17, 18, 35, 45 for the purpose of imparting elasticity to the diaper 1, but in this deployed state, the elastic members 17, The same diaper 1 is shown in a virtual state where there is no elasticity (contraction force) of 18, 35, 45.

In the unfolded state, the diaper 1 has a longitudinal direction, a lateral direction, and a thickness direction (direction penetrating the paper surface in FIG. 3) as three directions orthogonal to each other. The longitudinal direction is along the above-mentioned vertical direction. Then, one side in the longitudinal direction corresponds to the ventral side, and the other side corresponds to the dorsal side. Further, the outer side in the longitudinal direction corresponds to the upper side in the vertical direction, and the inner side in the longitudinal direction corresponds to the lower side in the vertical direction. Since the longitudinal direction and the longitudinal direction are similar to each other in this way, for convenience of explanation, the longitudinal direction may be used instead of the longitudinal direction even in this unfolded state. .. On the other hand, the lateral direction is synonymous with the lateral direction in the above-mentioned pants type state. Further, in the thickness direction, one side corresponds to the skin side in contact with the wearer's body, and the other side corresponds to the non-skin side on the opposite side. The thickness direction is along the above-mentioned front-back direction.

In the unfolded state of FIG. 3, the ventral band member 31 is arranged along the lateral direction, and the dorsal band member 41 is laterally spaced from the ventral band member 31 at a predetermined distance in the longitudinal direction. Arranged along the direction. Then, while the absorbent main body 10 is laid between the ventral band member 31 and the dorsal band member 41 along the longitudinal direction, the end portions 10ea and 10eb of the absorbent main body 10 in the longitudinal direction are closest to each other. It is joined and fixed to each of the band members 31 and 41 of the above, whereby the appearance shape thereof is substantially H-shaped in a plan view. Further, from this state, the diaper 1 is folded in half with the predetermined position CL1 in the longitudinal direction (the center position CL1 of the diaper 1 in the longitudinal direction) in the absorbent body 10 as the folding position, and the diapers 1 face each other in this folded state. When the lateral ends 31e and 41e of the band members 31 and 41 are joined to each other by the side seal portion SS described above, the band members 31 and 41 are connected to each other in an annular shape, thereby as shown in FIG. It is a pants-type diaper 1 in which a waist opening BH and a pair of leg openings LH and LH are formed.

The absorbent main body 10 has a substantially rectangular shape in a plan view in the expanded state of FIG. The longitudinal direction of the absorbent body 10 is arranged along the longitudinal direction of the diaper 1. Further, as shown in FIG. 4, the absorbent main body 10 has the absorbent body 11 and the liquid-permeable top sheet 13 that covers the absorbent body 11 from the skin side to form the skin side surface of the absorbent main body 10. It is provided with a liquid-impermeable back sheet 15 that covers the body 11 from the non-skin side and forms the non-skin side surface of the absorbent body 10.

The absorber 11 has a liquid-absorbing absorbent core 11c and a core wrap sheet (not shown) that covers the outer peripheral surface of the core 11c. The absorbent core 11c is a molded body obtained by molding a liquid absorbent material such as pulp fiber or a highly absorbent polymer into a substantially hourglass shape in a plan view as an example of a predetermined shape. Further, as the core wrap sheet, a liquid permeable sheet such as tissue paper or non-woven fabric can be used, but the core wrap sheet may not be used. Further, the shape of the absorbent core 11c is not limited to the above-mentioned substantially hourglass shape in a plan view, and may be any other shape.

The top sheet 13 is a liquid-permeable flexible sheet such as a non-woven fabric. Further, the back sheet 15 is a liquid-impermeable flexible sheet. As an example of the back sheet 15, a two-layer having a liquid-impermeable leak-proof sheet such as a polyethylene film or a polypropylene film and a non-woven fabric exterior sheet bonded to the non-skin side of the leak-proof sheet. A laminated sheet 15 having a structure can be mentioned.

As shown in FIG. 3, at least the back sheet 15 is a plane-sized sheet that protrudes from the absorber 11 in the longitudinal direction and the lateral direction. Then, leg gather LGs that expand and contract in the longitudinal direction are formed in the portions that protrude in the lateral direction. That is, the thread rubber 17 along the longitudinal direction is fixed to the protruding portion as an elastic member in a state of being extended in the longitudinal direction, whereby elastic leg gather LG is formed in the portion. ..

Further, as shown in FIGS. 3 and 4, the absorbent main body 10 has three-dimensional gathers LSG and LSG as leak-proof wall portions at each end in the lateral direction for the purpose of preventing lateral leakage. That is, a configuration in which the thread rubber 18 along the longitudinal direction is attached as an elastic member 18 to the sheet-like portion to be the three-dimensional gather LSG in a state of being extended in the longitudinal direction is provided at each end portion of the absorbent body 10 in the lateral direction. Has been done.

As shown in FIG. 3, the ventral band member 31 is a sheet-like member having a substantially rectangular shape in a plan view using two non-woven fabrics 32 and 33 as materials. That is, as shown in FIG. 4, the two nonwoven fabrics 32 and 33 are in a state of being overlapped with each other in the thickness direction, and the pair of facing surfaces facing each other are as shown in FIG. 5 described later. It is joined by a plurality of welded portions j, j ... (corresponding to the joined portion) discretely arranged in the vertical direction (longitudinal direction) and the horizontal direction. Then, as shown in FIG. 3, the ventral band member 31 is arranged so as to project laterally from the absorbent main body 10 on both sides in the lateral direction, and is non-skinned on the ventral end 10ea of the absorbent main body 10. It is stacked and joined from the side.

Further, the dorsal band member 41 is also a sheet-like member having a substantially rectangular shape in a plan view made of two non-woven fabrics 42, 43 as a material, like the ventral band member 31. That is, as shown in FIG. 4, the two nonwoven fabrics 42 and 43 are in a state of being overlapped with each other in the thickness direction, and the pair of facing surfaces facing each other are the ventral band members 31 of FIG. Similar to the case of the above case, a plurality of welded portions j, j ... (corresponding to the junction portion) discretely arranged in the vertical direction (longitudinal direction) and the horizontal direction are joined. Then, as shown in FIG. 3, the dorsal band member 41 is arranged so as to project laterally from the absorbent main body 10 on both sides in the lateral direction, and is non-skinned on the dorsal end portion 10 eb of the absorbent main body 10. It is stacked and joined from the side.

In the following description, the contents common to both the ventral band member 31 and the dorsal band member 41 will be described only for the ventral band member 31 on behalf of both, and for the dorsal band member 41, the corresponding members and the like will be described. The code is shown in parentheses only.

Further, in this example, spunbonded nonwoven fabric is used for each of the two nonwoven fabrics 32, 33 (42, 43) related to the ventral band member 31 (41). However, the present invention is not limited to this, and another type of non-woven fabric such as SMS (spunbond / meltblown / spunbond) non-woven fabric may be used. Further, in this example, a polypropylene (PP) single fiber, which is a typical example of a thermoplastic resin, is used as a constituent fiber of the non-woven fabric, but the fiber is not limited to this. For example, a single fiber of another thermoplastic resin such as polyethylene (PE) may be used, or a composite fiber having a sheath core structure such as PE and PP may be used.

FIG. 5 is a schematic plan view of the ventral band member 31 in the deployed state as viewed from the non-skin side.

As shown in FIG. 5, each of the lateral end portions 31e, 31e (41e, 41e) of the ventral band member 31 (41) is provided with the above-mentioned side seal portion SS. In this example, the side seal portions SS have a plurality of welded portions SSk, SSk ... Having the same shape as each other arranged side by side in a straight line along the vertical direction. Each of the welded portions SSk welds the non-woven fabric 33 of the ventral band member 31 and the non-woven fabric 43 of the dorsal band member 41, and faces each other in the two non-woven fabrics 32 and 33 related to the ventral band member 31. The pair of facing surfaces 32st and 33st of FIG. 4 are welded to each other, and the pair of facing surfaces 42st and 43st of FIG. 4 facing each other in the two nonwoven fabrics 42 and 43 related to the dorsal band member 41 are welded to each other. It is also something to do.

Further, as shown in FIG. 5, between the pair of facing surfaces 32st, 33st (42st, 43st) facing each other in the two nonwoven fabrics 32, 33 (42, 43) pertaining to the ventral band member 31 (41). In the non-woven fabric 32, 33 (42, 43), a plurality of thread rubbers 35, 35 ... (45, 45 ...) Are inserted side by side in the vertical direction as elastic members along the horizontal direction. It is attached based on the welded portions j, j ... As a result, the ventral band member 31 (41) is imparted with lateral elasticity. That is, the above-mentioned welded portions j, j ... Not only have the function of joining the pair of facing surfaces 32st, 33st (42st, 43st) of the two nonwoven fabrics 32, 33 (42, 43), but also the two sheets. It also has a function of attaching the thread rubber 35 (45) to the non-woven fabrics 32, 33 (42, 43).

6A and 6B are explanatory views of the latter function played by the welded portion j, that is, the attachment function of the rubber thread 35 (45), and are schematic enlarged views of the VI portion in FIG.
As shown in FIG. 5, the welded portions j, j ... Are provided for each of the thread rubbers 35 (45) arranged along the lateral direction. Further, the welded portions j are formed so as to be paired on both sides of the corresponding thread rubber 35 in the vertical direction, that is, the pair of welded portions j, j arranged on both sides in the vertical direction are welded portions to jP. Is doing. Then, a plurality of pairs of such welded portions vs. jP are formed side by side in the lateral direction with a gap between the welded portions vs. jPs adjacent to each other in the lateral direction. On the other hand, as shown in FIG. 6A, the pair of welded portions j, j forming the welded portion vs. jP are lined up with an interval Dj in the vertical direction. The size is set to be the same as or slightly larger than the vertical size D35t (D45t) of the rubber thread 35 (45) in a state of being stretched in the horizontal direction to the target value of the stretch ratio. Further, in the pants-shaped diaper 1 of FIG. 2, the thread rubber 35 (45) is relaxed from the stretched state of the stretch ratio described above. Therefore, in the same pants type state, as shown in FIG. 6B, the rubber thread 35 (45) tries to expand in the vertical direction while contracting in the horizontal direction, but here, based on the magnitude relationship of the above dimensions. , The vertical expansion of the rubber thread 35 (45) is restricted to the pair of welded portions j, j. As a result, the thread rubber 35 (45) is substantially sandwiched between the welded portions j and j in the vertical direction, and as a result, the thread rubber 35 (45) is placed in the ventral band. It is in a state of being attached to the two non-woven fabrics 32, 33 (42, 43) according to the member 31 (41).

Incidentally, the above-mentioned elongation ratio is a value R (= L1 / L0) indicating how many times the total length L1 of the thread rubber 35 (45) is extended to the total length L0 in the natural length no-load state. .. Then, the target value of the above-mentioned elongation ratio is selected from, for example, 1.5 times to 4.0 times. Further, as the fineness of the rubber thread 35 (45), for example, 400 dtex to 1000 dtex can be exemplified.

Further, as shown in FIG. 5, the ventral band member 31 (41) has a region AL in which the thread rubber 35 is not provided in the central portion in the horizontal direction and the lower portion in the vertical direction. Further, since the thread rubber 35 is not provided in the same region AL, the elasticity in the lateral direction is not imparted. In the following, the region AL in which the thread rubber 35 is not provided is also referred to as a “non-stretchable region AL”, and the region in which the thread rubber 35 is provided is also referred to as a “stretchable region AH”. Incidentally, the former non-stretchable region AL corresponds to the "low stretchable region" of the claim, and the latter stretchable region AH corresponds to the "high stretchable region" of the claim. In this example, the stretchable regions AH and AH are provided on both sides of the non-stretchable region AL in the lower portion of the ventral band member 31 in the lateral direction, respectively, while the stretchable regions are provided in the upper portion of the band member 31. AH is provided over substantially the entire length in the lateral direction.

In addition, the end portion 10ea in the longitudinal direction of the absorbent main body 10 overlaps with the non-stretchable region AL. As a result, lateral wrinkles are suppressed from occurring in the absorbent core 11c (FIG. 3) of the main body 10, and as a result, leakage of excrement caused by the wrinkles is prevented.

7A to 7C are explanatory views of a method of forming the non-stretchable region AL on the ventral band member 31 (45) and forming the stretchable regions AH and AH on both sides of the non-stretchable region AL in the lateral direction. First, as shown in FIG. 7A, a thread rubber 35 (45) over a substantially total length in the lateral direction is placed between the two nonwoven fabrics 32, 33 (42, 43) pertaining to the ventral band member 31 (45) in the lateral direction. Place in the stretched state. Next, as shown in FIG. 7B, the plurality of welded portions vs. jP, jP ... Are referred to as the stretchable region AH1 (hereinafter, also referred to as the stretchable region AH1) corresponding to the stretchable region AH among the nonwoven fabrics 32, 33 (42, 43). ), But not in the region AL1 corresponding to the non-woven fabric region AL (hereinafter, also referred to as the non-woven fabric region AL1). Further, the rubber thread 35 (45) is cut at a predetermined cutting position PC1 in the non-stretchable region AL1. Then, new ends 35en, 35en (45en, 45en) of the rubber thread 35 (45) are formed on both sides in the lateral direction of the cutting position PC1, and the extended state of the end 35en (45en) is formed. Relaxed, the abutment 35en (45en) attempts to contract laterally. However, at this time, since there is no welded portion pair jP in the non-stretchable region AL1, the end portion 35en (45en) of the thread rubber 35 (45) does not stay in the region AL1, and the same end portion 35en (45en) does not stay. , It contracts toward the expansion / contraction corresponding region AH1 in the lateral direction. As a result, as shown in FIG. 7C, the thread rubber 35 (45) does not exist in the non-stretchable region AL1, and as a result, the non-stretchable region AL1 is not imparted with elasticity. AL is formed. On the other hand, a welded portion pair jP is formed in the stretchable region AH1. Further, the end portion 35en (45en) of the rubber thread 35 (45) expands in the vertical direction while moving in the horizontal direction with the contraction in the horizontal direction. Therefore, when the same end portion 35en (45en) passes the position of the welded portion vs. jP at the position closest to the non-stretchable region AL1 in the stretchable region AH1 in the lateral direction, the same end portion 35en is expanded in the vertical direction. (45en) is sandwiched between the welded portions j and j of the welded portion to jP, whereby the same end portion 35en (45en) is attached to the non-woven fabric 32, 33 (43, 43). .. Further, after this, when the stretched state of the thread rubber 35 (45) is released over the entire length of the thread rubber 35 (45), the thread rubber 35 (45) is vertically contracted over the entire length. Expand in the direction. Then, even in all the remaining welded portions vs. jP, jP ... In the expansion / contraction corresponding region AH1, the welded portions j, j come to press the thread rubber 35 (45) in the vertical direction. As a result, the rubber thread 35 (45) is attached to the nonwoven fabrics 32, 33 (42, 43) in the stretchable region AH1, and as a result, the stretchable region AH1 is imparted with elasticity. A stretchable region AH is formed.

Such a diaper 1 is manufactured on a production line. FIG. 8 is a schematic plan view showing a state in which the diaper 1 is manufactured on the same line with a partial perspective. 9A and 9B are a schematic enlarged view of a portion A and a schematic enlarged view of a portion B in FIG. 8, respectively. By the way, to put it more correctly here, in FIG. 9B, the continuous sheets 42a and 43a related to the dorsal band member 41 should be visible instead of the continuous sheets 32a and 33a related to the ventral band member 31, but for convenience of explanation. Here, it is assumed that the continuous sheets 32a and 33a related to the ventral band member 31 are visible.

In the same line, for example, the two non-woven fabrics 32 and 33 (corresponding to the base sheet) related to the ventral band member 31 (corresponding to the sheet-like member) are continuous sheets 32a and 33a (base sheet) continuous in the transport direction, respectively. The two non-woven fabrics 42 and 43 (corresponding to the base sheet) related to the dorsal band member 41 (corresponding to the sheet-shaped member) are also continuously transported in the form of (corresponding to the continuous body). It is conveyed in the form of continuous sheets 42a and 43a (corresponding to a continuous body of base sheet). Then, each time each of the two continuous sheets 32a, 33a, 42a, 43a passes through the plurality of processing positions PK1 to PK6 set in the transport direction, the processing processing corresponding to each processing position PK1, PK2 ... Is performed for each of the two continuous sheets 32a, 33a, 42a, 43a.

Here, when the direction orthogonal to both the thickness direction and the transport direction of the continuous sheets 32a, 33a, 42a, 43a is defined as the "CD direction", in this example, two continuous sheets each. 32a, 33a, 42a, 43a, that is, both the two continuous sheets 32a, 33a related to the ventral band member 31 and the two continuous sheets 42a, 43a related to the dorsal band member 41 are conveyed side by side in the CD direction. Has been done. However, it is not limited to this.

Further, in this example, as the plurality of machining positions, the first machining position PK1 to the sixth machining position PK6 are set side by side in this order from the upstream to the downstream in the transport direction. The processing at each processing position PK1, PK2 ... Is for the two continuous sheets 32a, 33a related to the ventral band member 31 and for the two continuous sheets 42a, 43a related to the dorsal band member 41. And they are almost the same as each other.

Therefore, in the following, the common contents will be described without distinguishing between the ventral band member 31 and the dorsal band member 41. For example, it may be simply referred to as "belt member 31 (41)" or simply referred to as "two continuous sheets 32a, 33a (42a, 43a)". In that case, terms indicating each member such as "continuous sheet 32a, 33a (42a, 43a)", "thread rubber 35 (45)", "thread rubber continuous body 35a (45a)", etc. The code immediately after is the code of the member related to the ventral band member 31, and the code in parentheses following the code is the code of the member related to the dorsal band member 41.

As shown in FIG. 8, the transport of the two continuous sheets 32a, 33a (42a, 43a) pertaining to each band member 31 (41) is performed in a so-called cross flow mode. That is, the two continuous sheets 32a, 33a (42a, 43a) are conveyed in a posture in which the direction corresponding to the lateral direction of the diaper 1 faces the conveying direction. Therefore, on the two continuous sheets 32a, 33a (42a, 43a), the boundary position PBL between the diapers 1, 1 adjacent to each other in the lateral direction is virtually set at the product pitch P1 in the transport direction. Then, at the sixth processing position PK6 located at the end of the production line, the two continuous sheets 32a, 33a (42a, 43a) are cut by using the boundary position PBL as the cutting target position PC to form a single sheet. Diaper 1 is generated.

The two continuous sheets 32a, 33a (42a, 43a) related to each band member 31 (41) are conveyed by an appropriate conveyor (not shown) such as a belt conveyor or a conveyor roller. Therefore, unless otherwise specified, it is assumed that the two continuous sheets 32a, 33a (42a, 43a) are conveyed in the conveying direction by these conveying devices. Examples of the belt conveyor include a normal belt conveyor having a drive-circling endless belt as a transport surface, a suction belt conveyor having a suction function on the outer peripheral surface of the endless belt, and the like.

Further, in this example, the elasticity of each of the continuous sheets 32a, 33a, 42a, 43a is very small and negligible as compared with the elasticity of the rubber threads 35 and 45. Then, the continuous sheets 32a, 33a, 42a, 43a are conveyed in a stretched state in the conveying direction from the first processing position PK1 to the sixth processing position PK6.

The manufacturing process of diaper 1 will be described in detail below.
As shown in FIG. 8, first, the two continuous sheets 32a, 33a (42a, 43a) pertaining to each band member 31 (41) pass through the first processing position PK1. Then, at the time of passing through the two continuous sheets 32a, 33a (42a, 43a), as shown in FIGS. 8 and 9A, the two continuous sheets 32a, 33a (42a, 43a) are overlapped with each other in the thickness direction. Further, when superposed, the elasticity of the two continuous sheets 32a, 33a (42a, 43a) that are continuous in the transport direction between the pair of facing surfaces 32ast, 33ast (42ast, 43ast) facing each other. As a continuum of members, a series of rubber threads 35a, 35a ... (45a, 45a ...) Are inserted side by side in the CD direction in a state of being stretched in the transport direction to the above-mentioned target elongation ratio. Equivalent).

The arrangement of the rubber thread continuous body 35a (45a) on the pair of facing surfaces 32ast, 33ast (42ast, 43ast) is made by an appropriate transfer roller or the like (not shown), that is, the transfer roller or the like claims. Corresponds to the "placement device" in the section.

Next, both the two continuous sheets 32a and 33a related to the ventral band member 31 and the two continuous sheets 42a and 43a related to the dorsal band member 41 are not shown in FIGS. 8 and 9A, but are wound and conveyed. As an example of the apparatus, it is wound and conveyed around the outer peripheral surface 61as of the anvil roll 61a of the ultrasonic welding apparatus 60 (FIG. 10) described later (corresponding to the winding transfer step). Then, it passes through the second processing position PK2 located within the wound range R61a, and at the time of passing through, the two continuous sheets 32a, 33a (42a, 43a) are connected to each other as shown in FIG. 9A. The above-mentioned welded portions j, j ... Are formed in the welded portions j, j ... By the welding portions j, j ... 43ast) are joined together (corresponding to the joining portion forming step).

Here, as described above, in this production line, the horizontal direction of the diaper 1 is along the transport direction, and the vertical direction of the diaper 1 is along the CD direction. Therefore, the welded portions j are formed so as to be paired on both sides of the continuous body 35a (45a) of the rubber thread in the CD direction. That is, as shown in FIG. 9A, the pair of welded portions j, j arranged on both sides of the continuum 35a (45a) in the CD direction form the above-mentioned welded portion vs. jP. Then, a plurality of pairs of such welded portions vs. jPs are formed side by side in the transporting direction with a gap between the welding portions vs. jPs adjacent to each other in the transporting direction.

At this time, one side of the continuous sheets 32a and 33a in the CD direction corresponds to the upper part of the ventral band member 31 of the diaper 1. Therefore, a plurality of pairs of welded portions vs. jP, jP ... Are formed side by side over the entire length in the transport direction in the portion on one side. However, the other portion in the CD direction corresponds to the lower part of the ventral band member 31 of the diaper 1. Therefore, in the other side portion, there are two stretchable regions AH1 and AH1 (corresponding to the region corresponding to the highly stretchable region in the continuum of the base material sheet) and one non-stretchable corresponding region AL1 (base material sheet). (Corresponding to the region corresponding to the low expansion / contraction region) of the continuum of the above is repeatedly set for each product pitch P1. Then, a plurality of pairs of welded portions vs. jP, jP ... Are formed in the stretchable region AH1 but not in the non-stretchable compatible region AL1, that is, the welded portions vs. jP are partially formed in the transport direction. Will be done.

Further, at the second processing position PK2, the continuous body 35a (45a) of the rubber thread is cut at the predetermined cutting position PC1 in the non-stretchable region AL1 (corresponding to the cutting step). As a result, the non-stretchable region AL is formed in the non-stretchable region AL1 as described above.
That is, first, by the above-mentioned cutting, a new downstream end portion 35aen (45aen) of the continuous thread rubber 35a (45a) is formed on the upstream side of the above-mentioned cutting position PC1, and at the same time, downstream of the cutting position PC1. On the side, an intermediate 35 m (45 m) of a rubber thread having a length corresponding to two stretchable regions AH1 and AH1 adjacent to each other in the transport direction (corresponding to an intermediate of an elastic member) is generated. Further, due to the above-mentioned cutting, the downstream end portion 35aen (45aen) of the former thread rubber continuous body 35a (45a) is relaxed in the stretched state and contracts to the upstream side, and is generally located in the non-stretchable region AL1. On the other hand, the upstream end portion 35men (45men) of the latter intermediate of the rubber thread 35m (45m) is also relaxed in the stretched state and contracts to the downstream side so that it is not generally located in the non-stretchable region AL1. As a result, the non-stretchable region AL is formed in the non-stretchable region AL1.

On the other hand, the expansion / contraction-corresponding region AH1 is located on the downstream side in the direction in which the upstream end portion 35men (45men) of the thread rubber intermediate 35m (45m) contracts. It has passed the second processing position PK2. Therefore, a welded portion pair jP, jP ... Is formed in the same region AH1. Further, the upstream end portion 35 men (45 men) of the intermediate 35 m (45 m) of the same yarn rubber expands in the CD direction as it contracts to the downstream side. Therefore, the upstream end portion 35 men (45 men) is regulated so as not to be further contracted to the downstream side by being sandwiched between the welded portions j, j of the welded portion vs. jP. On the other hand, the downstream end portion 35aen (45aen) of the continuous body 35a (45a) of the rubber thread contracts to the upstream side, but the expansion / contraction corresponding region AH1 is also located on the upstream side. However, this stretchable region AH1 has not yet passed through the second processing position PK2 when the continuous body 35a (45a) of the rubber thread is cut. Therefore, the welded portion pair jP is not formed in the same region AH1, but here, the downstream end portion 35aen (45aen) of the thread rubber continuous body 35a (45a) is a continuous sheet 32a, 33a (42a). , 43a) are inserted between each other. Therefore, the sliding resistance received from these continuous sheets 32a, 33a (42a, 43a) causes the continuous sheets 32a, 33a (42a, 43a) to contract relatively slowly to the upstream side. As a result, before the downstream end portion 35aen (45aen) enters the expansion / contraction-corresponding region AH1, the expansion / contraction-corresponding region AH1 passes through the second processing position PK2, and as a result, the welded portion pair to the region AH1. jP is formed. For example, a welded portion pair jP located on the most downstream side in the expansion / contraction corresponding region AH1 is formed. Therefore, the downstream end portion 35aen (45aen) is sandwiched between the welded portions j and j of the welded portion vs. jP based on the expansion accompanying the subsequent contraction, whereby the downstream end portion does not contract further to the upstream side. Is regulated.

The formation of the welded portion j and the cutting of the continuous body 35a (45a) of the rubber thread are performed by the ultrasonic welding device 60. The details of this ultrasonic welding device 60 will be described later.

Next, as shown in FIG. 8, both the two continuous sheets 32a and 33a related to the ventral band member 31 and the two continuous sheets 42a and 43a related to the dorsal band member 41 pass through the third processing position PK3. do. Then, at the time of passing through the non-stretchable region AL formed on the two continuous sheets 32a and 33a related to the ventral band member 31, the two continuous sheets 42a and 43a related to the dorsal band member 41 were formed. A single-cut absorbent body 10 generated in another process (not shown) is hung and fixed between the non-stretchable region AL, whereby the diapers 1h, 1h ... A continuous body of substantially ladder-shaped diapers 1hs is formed.

The fixing of the absorbent main body 10 can be performed by using, for example, a rotary drum device (not shown). The rotary drum device has, for example, a rotary drum that rotates along a transport direction, and the rotary drum has a plurality of holding portions on the outer peripheral surface that removably hold the absorbent main body 10.

Next, the continuous body 1hs of the substantially ladder-shaped diaper passes through the fourth processing position PK4. Then, upon passing through the body, the main body 10 is folded in half at a predetermined position CL1 in the CD direction of the absorbent main body 10, whereby the two continuous sheets 32a, 33a and the dorsal band related to the ventral band member 31 are folded. The two continuous sheets 42a and 43a related to the member 41 are overlapped with each other in the thickness direction.

Such folding in half can be performed by using, for example, a bending guide device (not shown). The bending guide device has, for example, a guide plate or a guide roller arranged at a predetermined position in the transport direction. Then, these guide plates and guide rollers guide the continuum 1hs of the substantially ladder-shaped diaper passing through the arrangement position so as to form a folded shape in half.

Next, the continuous body 1hsb of the diaper in the folded state passes through the fifth processing position PK5. Then, at the time of passing through the two continuous sheets 32a, 33a related to the ventral band member 31 and the two continuous sheets 42a, 43a related to the dorsal band member 41 stacked in the thickness direction, the two continuous sheets 42a, 43a are conveyed in the transport direction. A pair of side seal portions SS and SS are formed by welding at each position on both sides of the cutting target position PC in the above, whereby the continuous body 1hsb of the same diaper is fixed in a folded state. Then, as a result, a continuous body 1s of pants-type diapers in which a plurality of pants-type diapers 1, 1 ... Are connected in the lateral direction is generated.

The formation of the side seal portion SS can be performed, for example, by using a heat seal device (not shown). The heat seal device has, for example, a pair of rolls heated while rotating along the transport direction. One roll is a heat embossed roll having a convex portion corresponding to each welded portion SSk of the side seal portion SS on the outer peripheral surface, and the other roll is an anvil roll that receives the convex portion on the smooth outer peripheral surface. ..

Next, as shown in FIG. 8, the pants-type diaper continuum 1s passes through the sixth processing position PK6. Then, at the time of passing through the pair of side seal portions SS, the same continuum 1s is cut by the cutting target position PC located between the pair of side seal portions SS (corresponding to the generation step), whereby the diaper 1 is manufactured. Will be done.

As shown in FIG. 9B, at the time of this cutting, two continuous sheets 32a, 33a (42a, 43a) related to the ventral band member 31 and the dorsal band member 41, respectively, on one side portion in the CD direction. The arranged thread rubber continuous bodies 35a, 35a ... (45a, 45a ...) And the thread rubber intermediates 35m, 35m ... (45m, 45m ...) Arranged on the other side in the CD direction are described above, respectively. It is cut at the cutting target position PC. Then, through the relaxation of the stretched state of the thread rubber 35 (45) caused by this, the thread rubber 35 (45) is made of the non-woven fabric 32 of each band member 31, 41 by the pinching pressure between the pair of welded portions j, j of the welded portion vs. jP. , 33 (42, 43), which is as described with reference to FIGS. 6A and 6B.

Such cutting can be performed using, for example, a cutter device (corresponding to a generator) (not shown). The cutter device has, for example, a pair of rolls that rotate along the transport direction. One roll is a cutter roll having a cutter blade on the outer peripheral surface, and the other roll is an anvil roll that receives the cutter blade on the outer peripheral surface.

The processing performed at the first processing position PK1 to the sixth processing position PK6 has been described above, but here, the processing processing performed at the second processing position PK2 will be described in more detail.

The processing at the second processing position PK2 is substantially the same for the members 32a, 33a, 35a related to the ventral band member 31 and the members 42a, 43a, 45a related to the dorsal band member 41. be. Therefore, in the following, on behalf of both of these, only the processing of the members 32a, 33a, 35a related to the ventral band member 31 will be described, and the description of that of the dorsal band member 41 will be omitted.

FIG. 10A is an explanatory diagram of the machining process performed at the second machining position PK2. That is, it is a schematic side view of the ultrasonic welding device 60 which is the main device of the processing process as viewed from the CD direction. Further, FIG. 10B is a schematic enlarged view of the arrow BB in FIG. 10A. Further, FIG. 11 is a schematic plan view showing the outer peripheral surface 61as of the anvil roll 61a described later related to the device 60 developed in the rotation direction Dc61a.

As shown in FIG. 10A, at the second processing position PK2, a continuous body 35a of rubber threads in a stretched state in the transport direction up to the target value of the elongation ratio is inserted between the pair of facing surfaces 32ast and 33ast. The continuous sheets 32a and 33a are conveyed from the first processing position PK1. Therefore, a transport mechanism 51 that receives and transports the continuous sheets 32a and 33a sent from the first machining position PK1 is arranged immediately upstream of the second machining position PK2, and is arranged on the downstream side in the transport direction. An ultrasonic welding device 60 is arranged.

The transport mechanism 51 includes, for example, a transport roller 51R that rotates around a rotation axis along the CD direction, and a servomotor (not shown) as a drive source that drives and rotates the transport roller 51R. As a result, the transport roller 51R is driven and rotated along the transport direction to feed the continuous sheets 32a and 33a in which the continuous body 35a of the rubber thread is inserted toward the ultrasonic welding device 60.

The ultrasonic welding device 60 (corresponding to the winding transport device) includes an anvil roll 61a (corresponding to a rotating body) that rotates along the transport direction and a horn 61h arranged at a predetermined position P61h in the rotation direction Dc61a of the anvil roll 61a. , Have.

The anvil roll 61a is rotatably supported around a rotation axis along the CD direction by an appropriate support member (not shown) such as a bearing. Then, the roll 61a is driven and rotated by applying a driving force from a servomotor (not shown) as a driving source. Further, the continuous sheets 32a and 33a sent from the above-mentioned transport roller 51R are wound around the roll 61a around the outer peripheral surface 61as of the roll 61a at a predetermined winding angle θ61a without relative slippage. Therefore, as the anvil roll 61a is driven and rotated, the continuous sheets 32a and 33a are wound and conveyed along the outer peripheral surface 61as of the roll 61a in the range R61a of the winding angle θ61a (hereinafter, also referred to as the winding range R61a). (Equivalent to the winding and transporting process). The wrapping angle θ61a is selected from, for example, a range of 20 ° to 270 °, preferably a range of 45 ° to 210 °, and more preferably a range of 60 ° to 180 °.

The horn 61h is arranged at the predetermined position P61h in the winding range R61a in the rotation direction Dc61a of the anvil roll 61a, and in this example, is arranged at the downstream end P61h of the winding range R61a. The predetermined position P61h is the same position as the above-mentioned second processing position PK2. The horn 61h is also a roll rotatably supported around a rotation axis along the CD direction by a support member (not shown) such as a bearing, and a driving force is applied from a servomotor (not shown) as a drive source. It is driven and rotated. Further, the horn 61h repeatedly expands and contracts at a predetermined frequency in the radius of gyration, so that the outer peripheral surface 61hs of the horn 61h functions as a vibration surface that ultrasonically vibrates. As a result, the outer peripheral surface 61hs vibrates in the direction of expanding or contracting the distance between the anvil roll 61a and the outer peripheral surface 61as. The vibration frequency is, for example, a predetermined value of 20 kHz to 35 kHz, and the amplitude is, for example, a predetermined value of 1 micron to 30 micron. Therefore, the vibrating surface 61hs is ultrasonically vibrated, whereby the pair of facing surfaces 32ast and 33ast in the two continuous sheets 32a and 33a passing between the same surface 61hs and the outer peripheral surface 61as are ultrasonically welded to each other. .. That is, the above-mentioned welded portion j is formed on the two continuous sheets 32a and 33a. Incidentally, the generation of such vibration is performed by inputting an electric signal having the above frequency to the piezo element of the converter (not shown) connected to the horn 61h.

On the other hand, as shown in FIGS. 10A and 10B, a plurality of convex portions 61at, 61at ... Are formed on the outer peripheral surface 61as of the anvil roll 61a so as to correspond to the above-mentioned welding portions j, j.

Therefore, when the portion of the continuous sheets 32a and 33a that abuts on the convex portion 61at passes through the arrangement position P61h of the horn 61h based on the rotation of the anvil roll 61a, the portion comes from the vibration surface 61hs which is the outer peripheral surface of the horn 61h. Ultrasonic vibration energy is applied to the above-mentioned portions of the continuous sheets 32a and 33a. As a result, the pair of facing surfaces 32ast and 33ast of the two sheets 32a and 33a generate heat and melt at the positions corresponding to the convex portions 61at as shown in FIG. 10B, and as a result, they are discontinuous as described above. A plurality of welded portions j, j ... Are formed in each of the above-mentioned expansion / contraction-corresponding regions AH1 in a joining pattern dispersed in the above, whereby the pair of facing surfaces 32ast, 33ast of both sheets 32a, 33a are joined (joining). Corresponds to the part formation process).

Further, in this example, the total length of the rotation direction Dc61a of the outer peripheral surface 61as of the roll 61a is set to be approximately the length corresponding to the above-mentioned product pitch P1. Therefore, in this ultrasonic welding device 60, the above-mentioned welding portion j is formed in order to form the stretchable region AH and the non-stretchable region AL for one diaper for each rotation of the anvil roll 61a.
Specifically, in the outer peripheral surface 61as of the anvil roll 61a shown in FIG. 11, one portion in the CD direction is associated with the upper portion of the ventral band member 31 in FIG. Therefore, the stretchable region AH1 in the continuous sheets 32a and 33a of FIG. 9A faces the one side portion over the entire length of the rotation direction Dc61a of the anvil roll 61a. Therefore, as shown in FIG. 11, a plurality of the above-mentioned convex portions 61at are provided on the one side portion over the entire length of the same rotation direction Dc61a. On the other hand, the portion of the outer peripheral surface 61as on the other side in the CD direction is associated with the lower portion of the ventral band member 31 in FIG. Therefore, the two stretchable regions AH1 and AH1 and one non-stretchable region AL1 in the continuous sheets 32a and 33a of FIG. 9A repeatedly face the other side portion. Therefore, as shown in FIG. 11, two convex regions A61at and A61at provided with convex portions 61at, 61at, and one non-convex region region not provided with convex portions 61at are provided on the other side portion. AN61at and AN61at are provided side by side in the rotation direction Dc61a. Then, with respect to the continuous sheets 32a and 33a transported to the anvil roll 61a along the transport direction, the anvil roll 61a is position-controlled in the rotation direction Dc61a, so that the two stretchable regions AH1 and AH1 have two. While the convex regions A61at and A61at face each other, one non-convex region AN61at faces one non-stretchable region AL1.

Further, the non-convex region AN61at on the outer peripheral surface 61as of the anvil roll 61a of FIG. 11 corresponds to the above-mentioned cutting position PC1 of the non-stretchable region AL1 in the continuous sheets 32a and 33a of FIG. Cutter blades 61ac, 61ac ... For cutting the continuum 35a are also arranged. Therefore, as shown in FIG. 12, when the portion of the thread rubber continuum 35a facing the cutter blade 61ac passes through the arrangement position P1h of the horn 61h based on the rotation of the anvil roll 61a, the horn Ultrasonic vibration energy is applied to the above-mentioned portion of the rubber thread continuous body 35a from the vibration surface 61hs, which is the outer peripheral surface of 61h, via the continuous sheets 32a and 33a, whereby the thread rubber continuous body 35a corresponds to the non-stretching. It is cut at the cutting position PC1 in the region AL1 (corresponding to the cutting step).

By the way, in this example, as described above with reference to FIGS. 10A and 13, the convex portion 61at related to the formation of the welded portion j and the cutter blade 61ac related to the cutting of the continuous body 35a of the thread rubber are formed. It is provided on the outer peripheral surface 61as of the same anvil roll 61a. Therefore, by preliminarily providing these convex portions 61at and the cutter blade 61ac at predetermined appropriate positions on the outer peripheral surface 61as, the thread rubber 35 is provided at a position downstream of the sixth processing position PK6. The welded portion j is easily formed at an appropriate position so as to be pinched from both sides in the CD direction, and the continuous body 35a of the rubber thread is also easily cut. As a result, the cutter blade 61ac fails to cut the continuous body 35a of the thread rubber while suppressing the welding portions j and j of the welding part vs. jP from failing to pinch the thread rubber 35 from the CD direction. Is also suppressed.

Further, as shown in FIG. 12, in this example, the arrangement position P61h of the horn 61h is included in the winding range R61a of the continuous sheets 32a and 33a around the anvil roll 61a. As a result, the continuous sheets 32a and 33a are wound around the upstream side of the rotation direction Dc61a from the same arrangement position P61h with a predetermined length. Therefore, the continuous body 35a of the rubber thread can be pressed against the continuous sheets 32a and 33a from both sides in the thickness direction, thereby increasing the above-mentioned sliding resistance that may occur between the continuous body 35a of the rubber thread and the continuous body 35a of the rubber thread. be able to. As a result, the shrinkage of the rubber thread continuous body 35a to the upstream side, which may occur when the thread rubber continuous body 35a is cut by the cutter blade 61ac, can be made slower. can.

Further, as can be seen from the comparison between FIGS. 9A and 11A, in this example, in the non-convex region AN61at, one cutter blade 61ac is arranged for each continuous body 35a of the rubber thread. As a result, the cutter blade 61ac is arranged so as to correspond to only one position in the transport direction in the non-stretchable region AL1 with respect to the continuous body 35a of one thread rubber.
Therefore, it is possible to suppress an increase in the degree of damage to the continuous sheets 32a and 33a due to the cutting of the cutter blade 61ac. The details are as follows. For example, in the comparative example of FIG. 13, as can be seen in comparison with FIG. 9A, the non-convex region AN61at of the outer peripheral surface 61as of the anvil roll 61a has a plurality of rubber threads for each continuous body 35a (example of FIG. 13). Then, the cutter blade 61ac of 3) is arranged. That is, for the continuous body 35a of one rubber thread, the cutter blade 61ac is arranged so as to correspond to a plurality of positions in the transport direction in the non-stretchable region AL1. However, in that case, the cutter blades 61ac, 61ac ... Corresponding to the plurality of positions in the transport direction of the continuous sheets 32a, 33a, respectively, will hit, and as a result, the degree of damage to the continuous sheets 32a, 33a will increase. It ends up. On the other hand, if the cutter blade 61ac corresponds to only one position in the transport direction for one continuous body 35a of rubber thread as in the example of FIG. 11, the cutter blade 61ac in the continuous sheets 32a and 33a The position where the continuous sheet hits can be minimized, and as a result, the degree of damage to the continuous sheets 32a and 33a can be reduced.

However, it is not limited to this. That is, the above-mentioned reference example (FIG. 13) may be used. In this case, even if one cutter blade 61ac fails to cut the thread rubber continuous body 35a, the other cutter blade 61ac can cut the thread rubber continuous body 35a. As a result, the continuous body 35a of the rubber thread can be cut more reliably.

Further, preferably, as shown in FIG. 14A, the arrangement position of the cutter blade 61ac may be arranged on the upstream side of the central position CAN61at in the rotation direction Dc61a in the non-convex region AN61at. That is, as shown in FIG. 14B, it is preferable to position the cutting position PC1 for cutting the continuous body 35a of the rubber thread with the cutter blade 61ac on the upstream side of the central position CAL1 in the transport direction in the non-stretchable region AL1. In this example, the cutting positions PC1, PC1 ... Of all the cutter blades 61ac, 61ac ... Are located on the upstream side of the central position CAL1.

Therefore, as compared with the case where the cutting position PC1 is located on the downstream side of the central position CAL1, immediately after cutting the thread rubber continuous body 35a by the cutter blade 61ac, the upstream side of the cutting position PC1. The welded portion j can be formed in the stretchable region AH1 located in. The welded portions j are provided on both sides of the continuous body 35a of the rubber thread in the CD direction. Therefore, the downstream end portion 35aen of the thread rubber continuous body 35a, which is located on the upstream side of the cutting position PC1 and contracts on the upstream side, is immediately pressed between the welded portions j and j to form the continuous sheet 32a, It can be attached to 33a. As a result, there is a problem that can occur when the time from the cutting to the formation of the welded portion j is long, that is, the relaxation of the stretched state of the rubber thread continuous body 35a is greatly propagated to the upstream side. It can be suppressed. As a result, even after the thread rubber continuum 35a is cut, the stretched state of the thread rubber continuum 35a located upstream of the cutting position PC1 is maintained at substantially the same level as the stretched state before cutting. It becomes easier to do.

However, it is not limited to this. That is, if at least one of the cutting positions PC1, PC1 ... Of all the cutting positions PC1, PC1 ... Lined up in the CD direction in the non-stretchable region AL1 of FIG. 14B is located upstream of the central position CAL1. The above-mentioned action and effect of suppressing the relaxation of the stretched state can be appropriately exerted. Therefore, it is not necessary that all the cutting positions PC1, PC1 ... Arranged in the CD direction have the above-mentioned positional relationship. For example, the cutting positions PC1, PC1 ... Of all the cutting positions PC1, PC1 ... May be one-third or more, half or more, or two-thirds or more of the cutting positions PC1, PC1 ... ..

Further, preferably, it is preferable to arrange the pressing roll 70 as virtually indicated by the two-dot chain line in FIG. That is, the pressing roll 70 that presses the continuous sheets 32a and 33a wound around the outer peripheral surface 61as of the anvil roll 61a toward the outer peripheral surface 61as is located upstream of the arrangement position P61h of the horn 61h in the rotation direction Dc61a of the anvil roll 61a. It is good to place it in.

If this is the case, the above-mentioned problem that may occur after cutting the rubber thread continuous body 35a with the cutter blade 61ac, that is, to the upstream side of the new downstream end portion 35aen of the thread rubber continuous body 35a. Excessive contraction can be suppressed. The details are as follows. First, as described above with reference to FIG. 9A, by cutting the thread rubber continuum 35a, a downstream end portion 35aen of the thread rubber continuum 35a is newly formed on the upstream side of the cutting position PC1. NS. Then, the downstream end portion 35aen may contract to the upstream side, but here, according to the pressing roll 70 of FIG. 12, the contraction of the downstream end portion 35aen to the upstream side is suppressed by the pressing. Can be done. As a result, it is possible to prevent the downstream end portion 35aen from moving far toward the upstream side at the boundary position BL (FIG. 9A) between the non-stretchable region AL1 and the stretchable region AH1. Further, due to the pressing, the sliding resistance between the pair of facing surfaces 32ast, 33ast of the continuous sheets 32a, 33a and the continuous body 35a of the rubber thread is also increased. And this also effectively contributes to the suppression of the movement of the downstream end portion 35aen.

Further, preferably, when the above-mentioned welded portion j and welded portion vs. jP are referred to as "first welded portion j1" (corresponding to the first welded portion) and "first welded portion vs. jP1", respectively. As in the example of FIG. 15, if the non-stretchable region AL1 is also provided with the second welding portion j2 (corresponding to the second joining portion) for joining the pair of facing surfaces 32ast and 33ast in the continuous sheets 32a and 33a. good. By doing so, it is possible to prevent the pair of facing surfaces 32st and 33st of FIG. 4 from being separated from each other in the non-stretchable region AL of the ventral band member 31 of FIG. Therefore, the non-woven fabrics 32 and 33 of the ventral band member 31 can be integrated with each other, and as a result, the strength of the ventral band member 31 can be improved.

The formation of the second welded portion j2 can be realized by providing a second convex portion (not shown) in the above-mentioned non-convex portion region AN61at on the outer peripheral surface 61as of the anvil roll 61a in FIG. That is, when the second convex portion of the outer peripheral surface 61as passes through the arrangement position P61h of the horn 61h in the rotation direction Dc61a, the continuous sheets 32a and 33a are ultrasonically welded by the second convex portion and the horn 61h. Can be done.

Further, in this case, it is more preferable to do the following. That is, as shown in FIG. 15, first, the second welded portion j2 is placed on the upstream side in the transport direction from the cutting position PC1 where the continuous body 35a of the rubber thread is cut by the cutter blade 61ac in the non-stretchable region AL1. At the same time, the second welded portion j2 is formed at positions on both sides of the continuous body 35a of the rubber thread in the CD direction. When the second welded portions j2 and j2 located on both sides in the CD direction are referred to as "second welded portion vs. jP2", a plurality of pairs of the second welded portions vs. jP2 are provided in the transport direction. At this time, the size of the distance Dj2 in the CD direction between the second welded portions j2 and j2 forming the second welded portion to jP2 is set to the size of the welded portions j1 and j1 forming the first welded portion to jP1 described above. The distance between the threads in the CD direction is made larger than the size of Dj, and the size of the thread rubber continuum 35a in the CD direction or less in a no-load state in which no external force is applied to the thread rubber continuum 35a.
Then, in this way, after cutting the thread rubber continuous body 35a at the cutting position PC1, the downstream end portion 35aen of the thread rubber continuous body 35a located on the upstream side of the cutting position PC1 is first. While guiding toward the welded portion j1, the downstream end portion 35aen moves to the upstream side beyond the first welded portion j1 and fails to pinch between the first welded portions j1 and j1. It can be suppressed. The details are as follows.
First, after cutting the thread rubber continuum 35a with the cutter blade 61ac, a downstream end portion 35aen of the thread rubber continuum 35a is newly formed on the upstream side of the cutting position PC1 as described above. .. Then, the downstream end portion 35aen contracts to the upstream side, and at this time, the second welded portions j2 and j2 have an interval Dj2 of the above-mentioned size between the CD directions of each other. .. Therefore, an appropriate sliding force acts from the second welded portions j2 and j2 on the downstream end portion 35aen of the thread rubber continuous body 35a that contracts to the upstream side, thereby causing the contraction to the upstream side. Momentum is diminished. As a result, it is possible to prevent the downstream end portion 35aen from moving to the upstream side beyond the first welding portion j1.

=== Other embodiments ===
Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the interpretation of the present invention. Further, the present invention can be changed or improved without departing from the spirit thereof, and it goes without saying that the present invention includes an equivalent thereof. For example, the following modifications are possible.

In the above-described embodiment, as shown in FIG. 8, a configuration having two continuous sheets 32a, 33a (42a, 43a) is exemplified as an example of the continuous body of the base sheet, but the present invention is not limited to this. For example, the continuous body of the base sheet may be one continuous sheet. Then, in this case, the one continuous sheet is folded back at a predetermined position in the CD direction to form a pair of facing surfaces, and the continuous body 35a (45a) of the rubber thread is inserted between the pair of facing surfaces. It will be inserted.

In the above-described embodiment, as shown in FIG. 3, a 3-piece type disposable diaper 1 is illustrated as an example of the absorbent article, but the present invention is not limited to this. For example, the method of the present invention may be used when an elastic member such as a rubber thread is attached to a sheet-shaped member used for a two-piece type disposable diaper. By the way, the two-piece type disposable diaper has a two-layered exterior sheet having a ventral side, an inseam and a dorsal side as the first component, and is fixed to the skin side surface of the exterior sheet. This is a type of diaper that has a sex body 10 as a second component. Further, the method of the present invention may be used when attaching an elastic member such as a rubber thread to a sheet-shaped member used for a so-called tape-type disposable diaper. By the way, the tape-type disposable diaper has a ventral portion that covers the wearer's torso from the ventral side and a dorsal portion that covers the torso from the dorsal side. It is a type of diaper that uses fastening tape to connect.

In the above-described embodiment, as shown in FIG. 6, the welded portion j having a substantially square plane view is illustrated as the joint portion, but the shape of the welded portion j is not limited to this. For example, it may be circular, or may have a shape having a longitudinal direction such as a rectangle or an oval shape. In the case of the latter shape having a longitudinal direction, the longitudinal direction may be along the transport direction (horizontal direction), may be along the CD direction (vertical direction), or may be along the transport direction. And may be along a direction that intersects both of the CD directions.

In the above-described embodiment, as shown in FIG. 5, the welded portions j, j ... Are provided in a so-called grid-like arrangement defined in the horizontal direction and the vertical direction (longitudinal direction). That is, each of the welded portions j, j ... Is provided at the intersection of the virtual straight line along the horizontal direction and the virtual straight line along the vertical direction, but the welding portion is not limited to this. For example, by providing the welding portions j, j ... At positions laterally displaced from the above intersection, these welding portions j, j ... may be provided in a so-called staggered arrangement. Further, in FIG. 5, these welded portions j, j ... Are arranged side by side in the vertical direction, but the present invention is not limited to this. For example, they may be arranged side by side in an oblique direction intersecting both the vertical direction and the horizontal direction.

In the above-described embodiment, as shown in FIG. 5, the welded portion j is not provided between the welded portions to be adjacent to each other in the vertical direction (CD direction), but the welding portion j is not limited to this. .. For example, one or more welded portions j may be provided between these welded portions vs. jP and jP. The welded portion j does not contribute to the attachment of the rubber thread 35 (45) to the nonwoven fabrics 32, 33 (42, 43), but contributes only to the bonding between the nonwoven fabrics 32, 33 (42, 43). Is.

In the above-described embodiment, the horn 61h of the ultrasonic welding device 60 of FIG. 10A is a roll that rotates around a rotation axis along the CD direction, but the present invention is not limited to this. For example, the horn 61h may be non-rotating (not shown). In that case, the horn 61h has a substantially flat vibrating surface facing the outer peripheral surface 61as of the anvil roll 61a, and the vibrating surface expands or contracts the distance between the outer peripheral surface 61as of the anvil roll 61a. It vibrates in the direction of

In the above-described embodiment, the thread rubber 35 (45), which tends to expand in the CD direction while contracting in the transport direction, is formed by welding portions j on both sides based on the cutting in the generation step of the sixth processing position PK6 in FIG. , J are pressed together in the CD direction, whereby the rubber thread 35 (45) is attached to the two non-woven fabrics 32, 33 (42, 43), but the present invention is not limited to this. That is, it is inserted into the pair of facing surfaces 32ast, 33ast (42ast, 43ast) of the continuous sheets 32a, 33a (42a, 43a) pertaining to the two nonwoven fabrics 32, 33 (42, 43) in the stage prior to the generation step. By relaxing the stretched state of the thread rubber continuum 35a (45a) and the thread rubber intermediate 35m (45m) and contracting the continuum 35a (45a) and the intermediate 35m (45m) in the transport direction. , The continuous body 35a (45a) and the intermediate body 35m (45m) may be attached by sandwiching the welding portions j and j on both sides in the CD direction. For example, in the pants-type diaper continuum 1s of FIG. 8, the stretched state of the thread rubber continuum 35a (45a) and the intermediate 35m (45m) is relaxed, and the continuum 35a (45a) and the intermediate 35m (45m) are relaxed. ) May be retracted in the transport direction, so that the continuous body 35a (45a) and the intermediate body 35m (45m) may be attached by sandwiching the welding portions j and j on both sides in the CD direction. Then, after that, the continuous body 1s of the pants-type diaper may be cut in the generation step to generate the diaper 1.

In the above-described embodiment, the ultrasonic welding device 60 as shown in FIG. 10A is shown as an example of the winding transfer device, but the present invention is not limited to this. For example, a so-called heat sealing device (not shown) may be used. That is, the heat sealing device has a receiving roll that rotates along the transport direction while having a heated smooth outer peripheral surface instead of the horn 61h, and has a convex corresponding to the welded portion j as a substitute for the anvil roll 61a. It has an embossed roll that rotates along the transport direction while having a portion on a heated outer peripheral surface. Then, according to the heat sealing device, when the continuous sheets 32a, 33a (42a, 43a) pass between these two rolls, the continuous sheet 32a, on the outer peripheral surface of the receiving roll and the convex portion. 33a (42a, 43a) is sandwiched, and based on the thermal welding at that time, the above-mentioned welded portion j is formed on the continuous sheets 32a, 33a (42a, 43a).

In the above-described embodiment, the cutting edges of the cutter blades 61ac, 61ac ... Provided on the outer peripheral surface 61as of the anvil roll 61a are tilted from the CD direction in the unfolded state of FIG. 11, but the present invention is not limited to this. For example, it may be parallel to the CD direction.

In the above-described embodiment, the continuous body 35a (45a) of the rubber thread is cut by the cutter blade 61ac on the outer peripheral surface 61as of the anvil roll 61a, but various modes are adopted as the cutting mode of the cutter blade 61ac. Can be done. For example, the cutting edge of the cutter blade 61ac and the outer peripheral surface 61hs of the horn 61h may be in contact with each other at the time of cutting, or the non-contacting mode, that is, the cutting edge of the cutter blade 61ac and the outer periphery of the horn 61h may be in contact with each other. The mode may be such that the continuous body 35a (45a) of the rubber thread is cut with a small gap always between the surface 61hs. In order to realize such a gap, convex portions called bearers are provided on both sides of the outer peripheral surface 61as of the anvil roll 61a in the CD direction in an annular shape over the entire circumference of the rotation direction Dc61a, and the bearers are provided as horns. It can be done by abutting on the outer peripheral surface 61hs of 61h. Further, the cutting edge of the cutter blade 61ac may be sharp or rounded, or may have a curved surface or a flat surface facing the outer peripheral surface 61hs of the horn 61h. That is, as long as the continuous body 35a (45a) of the rubber thread can be cut, any cutting mode may be adopted including the presence or absence of the gap as described above. Incidentally, which cutting mode is to be adopted is determined in consideration of, for example, the fineness (dtex) of the continuous thread rubber 35a (45a), the target value of the elongation ratio, and the like.

1 Disposable diapers (absorbent articles),
1hs A series of diapers in the shape of a ladder,
1hsb Folded diaper continuum,
1s Pants-type diaper continuum,
10 Absorbent body, 10ea end, 10eb end,
11 absorber, 11c absorbent core,
13 top seats, 15 back seats,
17 thread rubber (elastic member), 18 thread rubber (elastic member),
31 ventral band member (sheet-like member), 31e end,
32 non-woven fabric, 32st facing surface,
32a continuous sheet, 32ast facing surface,
33 non-woven fabric, 33st facing surface,
33a continuous sheet, 33ast facing surface,
35 thread rubber (elastic member), 35en end,
35m thread rubber intermediate (intermediate of elastic member), 35men upstream end,
35a thread rubber continuum (elastic member continuum), 35aen downstream end,
41 Dorsal band member (sheet-like member), 41e end,
42 non-woven fabric, 42st facing surface,
42a continuous sheet, 42ast facing surface,
43 non-woven fabric, 43st facing surface,
43a continuous sheet, 43ast facing surface,
45 thread rubber (elastic member), 45en end,
45m thread rubber intermediate (intermediate of elastic member), 45men upstream end,
45a thread rubber continuum (elastic member continuum), 45aen downstream end,
51 transport mechanism, 51R transport roller,
60 Ultrasonic welding device (winding transfer device),
61a anvil roll (rotating body), 61as outer peripheral surface,
61at convex part, 61ac cutter blade,
61h horn, 61hs outer peripheral surface (vibration surface),
70 pressing roll,
BH waist opening, LH leg opening,
LG leg gathers, LG three-dimensional gathers,
CL1 center position (predetermined position),
AL non-stretchable area (low stretchable area),
AL1 non-stretchable area (area corresponding to low stretchable area), CAL1 center position,
AH stretch area (high stretch area),
AH1 stretchable area (area corresponding to high stretchable area),
BL boundary position,
PC disconnection target position, PBL boundary position,
PC1 disconnection position,
j Welding part (joint part), jP Welding part pair,
j1 first welded part (first welded part), jP1 first welded part pair,
j2 2nd welded part (2nd welded part), jP2 2nd welded part pair,
SS side seal part, SSk welding part,
P1h placement position (predetermined position),
A61at convex area,
AN61at non-convex region, CAN61at center position,
PK1 1st machining position, PK2 2nd machining position, PK3 3rd machining position,
PK4 4th machining position, PK5 5th machining position, PK6 6th machining position,
R61a wrapping range,

Claims (12)

A method for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable regions at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is transported with the predetermined direction as the transport direction. In the arrangement step of arranging the continuum of the above in a state of being extended in the transport direction,
A winding transfer step of winding and transporting the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body rotating along the transport direction.
After the winding transfer step, the continuous body of the base material sheet is cut at a cutting target position set at a predetermined pitch in the transfer direction to generate a base material sheet of the sheet-like member. Have,
In the winding transfer step, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
A continuous body of the base material sheet is wound around the outer peripheral surface with a predetermined length on the upstream side in the rotation direction of the rotating body from the cutting position in the cutting step.
At the time of cutting in the cutting step, the region corresponding to the highly stretchable region in which the joint portion is not formed is located on the upstream side in the rotational direction of the rotating body.
In the generation step, an intermediate body of the elastic member is also cut at the cutting target position to generate an elastic member to be attached to the base sheet, and after the generation step, the elastic member is contracted in the transport direction. The elastic member expanded in the CD direction is in the form of a sheet according to an absorbent article, which is sandwiched between the joint portions on both sides of the CD direction in the CD direction and attached to the base material sheet. Manufacturing method of parts. The method for manufacturing a sheet-like member according to an absorbent article according to claim 1.
At a predetermined position in the rotation direction of the rotating body, a position where both the joint forming step and the cutting step are performed is set.
The cutting position for cutting the continuous body of the elastic member with the cutter blade in the region corresponding to the low expansion / contraction region is located upstream of the center position in the transportation direction in the region corresponding to the low expansion / contraction region. A method for manufacturing a sheet-like member according to an absorbent article, which is characterized by being located. A method for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable regions at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is transported with the predetermined direction as the transport direction. In the arrangement step of arranging the continuum of the above in a state of being extended in the transport direction,
A winding transfer step of winding and transporting the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body rotating along the transport direction.
After the winding transfer step, the continuous body of the base material sheet is cut at a cutting target position set at a predetermined pitch in the transfer direction to generate a base material sheet of the sheet-like member. Have,
In the winding transfer step, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
In the generation step, an intermediate body of the elastic member is also cut at the cutting target position to generate an elastic member to be attached to the base sheet, and after the generation step, the elastic member is contracted in the transport direction. The elastic member expanded in the CD direction is attached to the base material sheet by being sandwiched in the CD direction between the joint portions on both sides of the CD direction.
The cutter blade is arranged on the outer peripheral surface of the rotating body so as to correspond to only one position in the transport direction in the region corresponding to the low expansion / contraction region for one continuous body of the elastic member. A method for manufacturing a sheet-shaped member according to a characteristic absorbent article. A method for manufacturing a sheet-like member according to an absorbent article according to claim 1 or 2.
The cutter blade is characterized in that one continuous body of the elastic member is arranged on the outer peripheral surface of the rotating body so as to correspond to a plurality of positions in the transport direction in the region corresponding to the low expansion / contraction region. A method for manufacturing a sheet-shaped member according to an absorbent article. A method for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable regions at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is transported with the predetermined direction as the transport direction. In the arrangement step of arranging the continuum of the above in a state of being extended in the transport direction,
A winding transfer step of winding and transporting the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body rotating along the transport direction.
After the winding transfer step, the continuous body of the base material sheet is cut at a cutting target position set at a predetermined pitch in the transfer direction to generate a base material sheet of the sheet-like member. Have,
In the winding transfer step, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
In the generation step, an intermediate body of the elastic member is also cut at the cutting target position to generate an elastic member to be attached to the base sheet, and after the generation step, the elastic member is contracted in the transport direction. The elastic member expanded in the CD direction is attached to the base material sheet by being sandwiched in the CD direction between the joint portions on both sides of the CD direction.
A position for performing the cutting step is set at a predetermined position in the rotation direction of the rotating body.
The pressing roll that presses the continuous body of the base material sheet wound around the outer peripheral surface of the rotating body toward the outer peripheral surface is arranged at a position upstream of the predetermined position in the rotational direction. A method for manufacturing a sheet-shaped member according to an absorbent article. A method for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable regions at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is transported with the predetermined direction as the transport direction. In the arrangement step of arranging the continuum of the above in a state of being extended in the transport direction,
A winding transfer step of winding and transporting the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body rotating along the transport direction.
After the winding transfer step, the continuous body of the base material sheet is cut at a cutting target position set at a predetermined pitch in the transfer direction to generate a base material sheet of the sheet-like member. Have,
In the winding transfer step, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
In the generation step, an intermediate body of the elastic member is also cut at the cutting target position to generate an elastic member to be attached to the base sheet, and after the generation step, the elastic member is contracted in the transport direction. The elastic member expanded in the CD direction is attached to the base material sheet by being sandwiched in the CD direction between the joint portions on both sides of the CD direction.
When the joint is used as the first joint,
The joint portion forming step is characterized in that a second joint portion for joining the pair of facing surfaces to each other is formed in a region corresponding to the low expansion / contraction region by the second convex portion of the outer peripheral surface of the rotating body. A method for manufacturing a sheet-shaped member according to an absorbent article. The method for manufacturing a sheet-like member according to an absorbent article according to claim 6.
In the joint portion forming step, the second joint portion is formed in the region corresponding to the low expansion / contraction region on the upstream side in the transport direction from the cutting position where the continuous body of the elastic member is cut by the cutter blade. , The second joint is formed at positions on both sides of the continuum of the elastic member in the CD direction, respectively.
The size of the distance in the CD direction between the second joints on both sides is larger than the size of the distance in the CD direction between the first joints on both sides, and the elastic member. A method for manufacturing a sheet-like member according to an absorbent article, wherein the size of the continuous body of the elastic member in the CD direction or less in a no-load state in which an external force is not applied to the continuous body. A method for manufacturing a sheet-like member according to any one of claims 1 to 7.
At a predetermined position in the rotation direction of the rotating body, a position where both the joint forming step and the cutting step are performed is set.
At the predetermined position, a horn that ultrasonically vibrates toward the outer peripheral surface of the rotating body is provided.
When the convex portion of the outer peripheral surface of the rotating body passes through the predetermined position, the joint portion is formed by sandwiching the convex portion between the horn and the convex portion, and the outer peripheral surface of the rotating body is formed. A method for manufacturing a sheet-like member according to an absorbent article, which cuts a continuous body of the elastic member by sandwiching the cutter blade between the horn and the cutter blade when the cutter blade passes through the predetermined position. .. An apparatus for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable region at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is conveyed in the predetermined direction. An arrangement device for arranging the continuum of the above in an extended state in the transport direction,
A winding transport device that winds and transports the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body that rotates along the transport direction.
The base of the sheet-like member is formed by cutting the continuous body of the base material sheet at a position downstream of the winding transport device in the transport direction at a cutting target position set at a predetermined pitch in the transport direction. It has a generator that produces a material sheet, and
In the winding transfer device, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
A continuous body of the base material sheet is wound around the outer peripheral surface with a predetermined length on the upstream side in the rotation direction of the rotating body from the cutting position in the cutting step.
At the time of cutting in the cutting step, the region corresponding to the highly stretchable region in which the joint portion is not formed is located on the upstream side in the rotational direction of the rotating body.
The generator also cuts an intermediate of the elastic member at the cutting target position to generate an elastic member to be attached to the base sheet, and on the downstream side of the generator in the transport direction, the elastic member is generated. The elastic member that contracts in the transport direction and expands in the CD direction is characterized in that the elastic member is sandwiched between the joint portions on both sides of the CD direction in the CD direction and attached to the base material sheet. A device for manufacturing sheet-shaped members related to absorbent articles. An apparatus for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable region at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is conveyed in the predetermined direction. An arrangement device for arranging the continuum of the above in an extended state in the transport direction,
A winding transport device that winds and transports the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body that rotates along the transport direction.
The base of the sheet-like member is formed by cutting the continuous body of the base material sheet at a position downstream of the winding transport device in the transport direction at a cutting target position set at a predetermined pitch in the transport direction. It has a generator that produces a material sheet, and
In the winding transfer device, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
The generator also cuts an intermediate of the elastic member at the cutting target position to generate an elastic member to be attached to the base sheet, and on the downstream side of the generator in the transport direction, the elastic member is generated. The elastic member, which contracts in the transport direction and expands in the CD direction, is sandwiched between the joint portions on both sides in the CD direction in the CD direction and attached to the base sheet.
The cutter blade is arranged on the outer peripheral surface of the rotating body so as to correspond to only one position in the transport direction in the region corresponding to the low expansion / contraction region for one continuous body of the elastic member. A device for manufacturing a sheet-shaped member related to a characteristic absorbent article. An apparatus for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable region at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is conveyed in the predetermined direction. An arrangement device for arranging the continuum of the above in an extended state in the transport direction,
A winding transport device that winds and transports the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body that rotates along the transport direction.
The base of the sheet-like member is formed by cutting the continuous body of the base material sheet at a position downstream of the winding transport device in the transport direction at a cutting target position set at a predetermined pitch in the transport direction. It has a generator that produces a material sheet, and
In the winding transfer device, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
The generator also cuts an intermediate of the elastic member at the cutting target position to generate an elastic member to be attached to the base sheet, and on the downstream side of the generator in the transport direction, the elastic member is generated. The elastic member, which contracts in the transport direction and expands in the CD direction, is sandwiched between the joint portions on both sides in the CD direction in the CD direction and attached to the base sheet.
A position for performing the cutting step is set at a predetermined position in the rotation direction of the rotating body.
The pressing roll that presses the continuous body of the base material sheet wound around the outer peripheral surface of the rotating body toward the outer peripheral surface is arranged at a position upstream of the predetermined position in the rotational direction. A device for manufacturing a sheet-shaped member related to an absorbent article. An apparatus for manufacturing a single-cut sheet-like member having high stretchable regions having higher elasticity in the predetermined direction than the low stretchable region at positions on both sides of the low stretchable region in a predetermined direction.
An elastic member continuous in the transport direction between a pair of facing surfaces facing each other in a continuous body of base sheets related to the sheet-shaped member that is continuously transported in the predetermined direction and is conveyed in the predetermined direction. An arrangement device for arranging the continuum of the above in an extended state in the transport direction,
A winding transport device that winds and transports the continuous body of the base material sheet on which the continuous body of the elastic member is arranged around the outer peripheral surface of the rotating body that rotates along the transport direction.
The base of the sheet-like member is formed by cutting the continuous body of the base material sheet at a position downstream of the winding transport device in the transport direction at a cutting target position set at a predetermined pitch in the transport direction. It has a generator that produces a material sheet, and
In the winding transfer device, a joint forming step and a cutting step are performed.
In the joint portion forming step, the joint portion for joining the pair of facing surfaces to each other by the convex portion provided on the outer peripheral surface of the rotating body corresponds to the highly elastic region in the continuous body of the base material sheet. A plurality of joints are formed in the region to be provided with an interval in the transport direction, and the joints are formed at positions on both sides of the continuum of the elastic member in the CD direction intersecting the transport direction.
In the cutting step, the continuous body of the elastic member is cut by a cutter blade provided on the outer peripheral surface of the rotating body in the region corresponding to the low expansion / contraction region of the continuous body of the base material sheet. An intermediate body of the elastic member corresponding to the high expansion / contraction region is generated, and the intermediate body is generated.
The generator also cuts an intermediate of the elastic member at the cutting target position to generate an elastic member to be attached to the base sheet, and on the downstream side of the generator in the transport direction, the elastic member is generated. The elastic member, which contracts in the transport direction and expands in the CD direction, is sandwiched between the joint portions on both sides in the CD direction in the CD direction and attached to the base sheet.
When the joint is used as the first joint,
The joint portion forming step is characterized in that a second joint portion for joining the pair of facing surfaces to each other is formed in a region corresponding to the low expansion / contraction region by the second convex portion of the outer peripheral surface of the rotating body. A device for manufacturing a sheet-shaped member related to an absorbent article.

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