JPS6399302A - Elastomer unit, apparatus for producing the same and clothing having elastomer unit mounted thereto - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful for imparting a gather function to various types of clothing such as disposable diapers and diaper covers, or to their base fabrics such as underground woven fabrics. The present invention relates to an elastic body unit, an apparatus for manufacturing the same, and clothing to which the elastic body unit is attached.

[Prior Art] In the field of clothing, various elastic means are employed to bring a part of clothing into close contact with the human body to exhibit a position holding effect and a sealing effect. For example, it is known that disposable diapers have elastic means that are arranged to tighten around the thighs during use to prevent fluid leakage from the thighs, and elastic means that are arranged to tighten around the torso for the same purpose. Elastic means have also been proposed to prevent leakage.

Generally, such elastic means are thread-like or band-like elastic bodies fixed to appropriate parts of clothing by means such as sewing, fusing, or gluing, but sewing is complicated and reduces productivity. The drawback is that production costs are also high due to the low production cost, and for products such as disposable diapers that are used only once and are not intended to be reused, adhesives and fusions that do not increase production costs are the mainstream. . However, when attaching an elastic body, it is fixed to the target garment in a stretched state, and then it exerts its restoring force to exhibit adhesion to the human body, but on the garment manufacturing line, the target garment is Since the elastic body is moved or handled in its uncontracted state, it is necessary to attach the elastic body to clothing in a stretched state, which makes this operation surprisingly difficult. For this reason, various ideas have been devised for the process of continuously attaching elastic bodies to clothing, etc., which are used for eight shifts, but there are still many problems, especially with regard to the means of attaching elastic bodies in a direction approximately perpendicular to the direction of the product f3. There is nothing that can satisfy me.

To further explain the technical background of disposable diapers and their manufacturing process, FIG. 3 is a perspective view showing the structure of such a disposable diaper. 1 obtained by cutting along X
A part of the diaper is disassembled to show its internal structure. That is, the diaper 1 has a water-permeable sheet (such as a non-woven fabric) 2 and a water-sealing sheet (such as a plastic film) 3, which is shaped like a drum in plan view, and has both the above-mentioned sheets 2. 3, a sheet-like water absorbent body 4 of a small area is stacked on top of each other, and the peripheral edges of the water-permeable sheet 2 and the water-sealing sheet 3 are adhered by hot melt or the like. Furthermore, it is common to attach stretched elastic bodies 10 and 10 to both edges of the water-sealing sheet 3 corresponding to the narrow width portion of the hourglass-shaped water absorbent body 4. Regarding the shape of the water absorbing body, in addition to the drum shape, rectangular shapes and the like have also been proposed.

FIG. 4 is a schematic explanatory diagram showing the manufacturing method of the above-mentioned disposable diaper.
At the same time, the water-permeable sheet 2 is supplied from the water-sealing sheet winding roll 9 to the lower surface side of the water-absorbing body 4.
are supplied, sandwiched between turning rollers 14 and 19, and overlapped to form a strip-shaped laminate. Note that a nozzle 16.1 is installed in advance on the facing side of the water-permeable sheet 2 and the water-sealing sheet 3.
The adhesive discharged from 5 is applied, and the parts are pressed and bonded to each other during the lamination and side sealing processes.

In addition, in the illustrated method, the elastic strand-wrapped roll 1 is placed on the water-sealing sheet 3 fed out from the water-sealing sheet-wrapped roll 9.
The elastic strand 10 supplied from 1.11 is attached in a stretched state. The strip-shaped 'UtPJ body thus obtained is appropriately trimmed and then cut at partial pitches using an end cutter 17 to obtain the disposable diaper shown in FIG. 3. Note that 13 indicates a heat cutter for cutting the elastic strand 10. When using such a disposable diaper 1, the water-permeable sheet 2 side should be the inner surface (contacting the crotch of an infant, etc.), the narrow part N should be in contact with the crotch of an infant, etc., and the wide part W should be in contact with the crotch of an infant, etc. , W are bent so as to fit the abdomen and back, and the corner portions 5.6 and 5a, 6a of the diaper 1 are connected with adhesive fastener tape or the like and worn.

In the disposable diaper manufactured in this way, elastic strands are attached in the length direction along both sides of the narrow part of the disposable diaper, so the tightening force of the elastic body tightens the infant's legs to a certain extent. It can be tightened and liquid leakage from here is almost completely avoided. In this way, the arrangement of the elastic strands for tightening the legs is adjusted in accordance with the walking of the water-sealing sheet 3, since the running direction of the water-sealing sheet 3 serving as the base material and the arrangement direction of the elastic strands are the same. However, it is possible to attach a stretched elastic strand to the water-sealing sheet 3.
If the ends of the elastic strands are cut with the heat cutter 13 after being attached to the elastic body, there is a risk that the ends of the elastic strands will be cut off before the attached portions are completely fixed, and the end portions of the elastic strands may separate from the attached portions. In order to prevent this, improvements have been made to the characteristics and amount of adhesive applied by the nozzle 15, but this has not yet completely eliminated the occurrence of adhesion defects.

On the other hand, it has been pointed out that liquid leakage when using disposable diapers occurs not only from the legs but also from around the torso. It is necessary to make sufficient contact. However, regarding the area around the torso, although consideration has been given to stably tightening by adjusting the attachment position and strength of fastener tape, etc., it is necessary to use water-sealing sheets and fastener tape during long-term use. Due to stretching or misalignment of the wearer's position, a gap may develop between the disposable diaper and the torso, and liquid may leak from this gap. Furthermore, when an infant or the like moves actively, the absorbent body inside the disposable diaper may shift its position, causing a portion of the disposable diaper to roll up and protrude from the waist area, increasing fluid leakage along the absorbent body. These results in wet clothing and bedding.

As described above, for clothing in general, including disposable diapers, the operation of attaching elastic strands in a stretched state on the manufacturing line is a troublesome operation, and is a bottleneck in the manufacturing process. Especially in disposable diapers, it is necessary to prevent liquid leakage from the waist, and for this purpose, the waist (wide part) of disposable diapers is made of elastic material in the same way as the leg attachment part (narrow part). There is a need for a disposable diaper that has a structure in which the diaper is attached to the body and the elastic body is tightened by force to bring the diaper into close contact with the waist.

However, if you are trying to manufacture a diaper with an elastic body attached, the above-mentioned tightening around the waist will have to be done in the sheet width direction, that is, in the running direction, with respect to the wide part of the water-permeable sheet or water-sealing sheet that runs in the direction of the white arrow in Fig. 3. It is necessary to attach the above-mentioned elastic body in a stretched state in the direction perpendicular to the traveling direction, and this operation process is more difficult than the process of stretching and attaching the elastic body in the same direction as the running direction.Currently, the elastic body is attached in-line. A rational manufacturing method for stretch attachment has not been established.

[Problems to be Solved by the Invention] The present invention has been made in view of these circumstances, and provides a method for attaching elastic strands to various clothing base materials in a stretched state. The first purpose is to provide an elastic body unit that can be easily manufactured, and the second purpose is to provide an elastic body unit that can be manufactured rationally. A third object of the present invention is to provide an apparatus, and a third object is to provide a garment to which an elastic body unit is attached.

[Means for Solving the Problems] The elastic body unit of the present invention, which has achieved the above object, has a plurality of elastic body units having both ends attached to the tape pieces between a pair of separated tape pieces. The gist is that the elastic strands are constructed, and the elastic unit manufacturing apparatus according to the present invention is provided with a large number of elastic strand engaging portions in the longitudinal direction, and the conveying members traveling in the longitudinal direction are arranged opposite to each other. an elastic strand conveying means disposed as an elastic body strand, and an elastic strand that spans the elastic strand between the pair of conveying members by making an elastic strand feeding section go around the elastic strand conveying means so as to surround the elastic body strand conveying means. The gist is that it comprises a winding means, an attaching means for attaching a piece of tape to both ends of the elastic strand for an arbitrary number of turns stretched over the conveying section, and a cutting means for cutting both ends of the elastic strand. Furthermore, the garment of the present invention is characterized in that the tape piece of the elastic body unit is attached to the surface of the base material in a state in which the elastic body strand is stretched.

[Function] The difficulty in stretching and attaching elastic strands is that elastic strands are generally thin and have a smaller attachment area than a wide band-shaped elastic body, so the elastic body retention force at the attachment part is weak, making it difficult to maintain the stretched state. It is difficult to maintain. Therefore, the inventors of the present invention have studied various means for attaching the thread-like elastic body, and as a result, they have arrived at a structure in which pieces of tape are attached in advance to both ends of the thread-like elastic body to maintain the stretched state when the body is stretched. death,
We have now proposed the elastic body unit of the present invention.

That is, in the elastic body unit, the tape piece captures both end portions of the filamentous elastic body in an attached state, so when the filamentous elastic body is attached to the garment base material in a stretched state, the entire tape piece is attached to the garment base material. As a result, the holding force becomes much stronger than when the elastic strand is directly attached to the falcon. In other words, even if the contractile force of the stretched elastic strand acts as a detachment force on the attached part, the entire surface of the tape piece acts as an attachment surface to the garment base material and exerts a strong holding force, so the elastic strand Departure is definitely prevented. Note that the number of elastic strands installed between a pair of tape pieces may be one, but in the case of one elastic unit, the biting effect of the small diameter elastic strand will be reduced when the elastic unit is attached to the garment base material. The large flap causes discomfort such as pain and rash to the wearer, and the leakage prevention effect becomes unstable. On the other hand, in an elastic unit in which two or more (multiple) elastic strands are installed, the multiple elastic strands exhibit a widening effect corresponding to the installation interval, increasing the contact area and making it easier for the wearer. The pain caused is alleviated and the leakage prevention effect is also improved.

Therefore, in the present invention, a plurality of elastic strands are installed.

A preferred structure of the elastic body unit according to the present invention is as follows:
An example is where a pair of tape pieces is an adhesive tape, each tape piece is a set of two tape pieces, and both ends of each elastic strand are sandwiched between the two tape pieces. In this case, the clamping force of the two tape pieces acts on the ends of the elastic strands, further improving the holding force. Also 2
In an elastic unit that uses a set of tape pieces, if one tape piece is set to have a larger area than the other tape piece, then the upper and lower ends of the elastic strand are sandwiched.
The adhesive surface of one of the tape pieces is exposed, and the elastic body unit can be easily attached to the garment base material using the exposed adhesive surface.

In the present invention, the elastic body strand includes not only a filamentous elastic body but also a flat band type elastic body having a relatively narrow width.

Then, the elastic body unit having the above structure is placed on the surface of the clothing base material.
By attaching the elastic strands in a stretched state, a good gathering effect can be imparted to the garment base material. There is no particular restriction on the S-positioning part, but for example, when the garment is a disposable diaper, the elastic body unit of the present invention can be attached to give a gather effect around the legs and torso. In particular, the elastic body unit of the present invention has superior handling properties in the stretched state compared to the case where the elastic body strands are handled one by one. By gripping it and attaching it to a predetermined location on a clothing base material, it is possible to easily give a gathering effect to the clothing base material. Moreover, since the tape piece is attached, the elastic strand can be firmly held in tension. Furthermore, as described above, it is particularly difficult to stretch and attach elastic strands to a continuously running strip-shaped base material in a direction perpendicular to the running direction. As mentioned above, the unit is easy to handle, so
The elastic strand can be easily stretched and attached in a direction perpendicular to the running direction of the strip-shaped base material.

Next, the elastic body unit manufacturing apparatus according to the present invention rationalizes the elastic body unit shown in the above structure using, for example, a long elastic body strand wound around a roll and a long tape wound around a roll as raw materials. The basic structure of the device is a pair of elastic strand conveying means arranged opposite to each other, and an elastic strand winding means that spans the conveying means so as to wind the elastic strand. and an attachment means for attaching a piece of tape to both ends of an arbitrary number of turns of the elastic strand, and a means for cutting the elastic strand every arbitrary number of turns, and the elastic strand is arranged over a conveying means. The elastic body strand has a zigzag shape, and as the conveyance means advances, the elastic body strand moves eight times in parallel in a zigzag manner and is fed to the tape piece attachment section. Then, by attaching a piece of tape to each arbitrary number of turns of the elastic strand and cutting the elastic strand after every arbitrary number of turns, the elastic unit can be obtained.

When using such an elastic body unit manufacturing device, elastic body units can be manufactured continuously, but preferably, the device is installed in a garment manufacturing line, for example, a disposable diaper manufacturing line, and the manufactured elastic body units are attached. By passing the receiver over the surface of the diaper base material, the elastic body unit can be attached to a predetermined location of the diaper, and a gather effect can be imparted. In addition, since the manufactured elastic body unit itself exhibits an independent function as a gathering effect imparting means, there is no restriction on the direction in which the elastic body unit manufacturing device is arranged with respect to the garment manufacturing line. The elastic body unit can be delivered and attached in any direction such as the running direction of the garment production line or the direction perpendicular to the running direction.

In the present invention, the number of elastic strands stretched between the tape pieces may be one, but generally there are a plurality of elastic strands, for example three to three.
There are often 5 trees, and of course there may be more than 5 trees.

Furthermore, each elastic strand stretched may be composed of one filament, but it may also be an aggregate strand of two or more filaments.

[Embodiment] FIG. 1(a) is a perspective explanatory view showing a preferred embodiment of the elastic body unit according to the present invention, in which a set of two upper and lower tape pieces 3 is shown.
6, 36a and 37, 37a are arranged apart from each other, and four elastic strands E are installed between the tape pieces 36, 36a and 37, 37a. Both ends of the elastic strand E are sandwiched between two sets of tape pieces 36 and 36a and tape pieces 3F and 37a in a state where they are adhered to the tape pieces. Pieces 37 and 37a are pasted together, and as a result 1
The four elastic strands E, which are strung between the pair of tape pieces 36 and 37, are firmly held at both ends by the tape pieces.

Although the elastic strand is bonded to the tape piece in the above example, it is also possible to use means such as fusing, or sewing, although this method is inferior in terms of workability. An adhesive such as a hot melt adhesive is used for adhesion, but if adhesive tape is used as the tape piece, the elastic strand can be adhered to the tape piece without using an adhesive. In addition, in the above embodiment, a pair of upper and lower tape pieces have the same size, but as shown in FIG. 1(b), at least one of the tape pieces is formed of adhesive tape, and the adhesive tape When one tape piece is set to have a larger area than the other tape piece, the adhesive surface S of the adhesive tape piece protrudes from the other tape piece, so the exposed adhesive surface can be used to attach the elastic body unit to various clothing base materials. can.

Furthermore, since the elastic body unit of the present invention has a plurality of elastic body strands installed between the pieces of tape, its handling is far superior to handling only the elastic body strands. In order to further improve the shape stability of the tape, it is effective to construct an elastic unit by attaching a flexible sheet from at least one side to the elastic strand construction region between the pair of tape pieces. In this case, it is desirable that the flexible sheet be thin enough not to impede the stretchability of the elastic strands, and in order to ensure air permeability and moisture permeability in the area where the elastic unit is attached, non-woven fabric or knitted fabric should be used. A breathable sheet such as is preferred.

FIG. 2 is an exploded perspective explanatory view showing an embodiment of the garment of the present invention in which the elastic body unit shown in FIG. 1 is attached to the longitudinal edge of the water-sealing sheet 3 of a disposable diaper. This is equivalent to the conventional diaper shown in the figure. That is, elastic units F are attached to both longitudinal edges of the water-sealing sheet 3 in the sheet width direction using a hot melt adhesive, thereby imparting a gather effect to the diaper girth. In addition, each T is a fastening table, and the water-sealing sheet 3
It is attached to the outer surface of the diaper and is used when wearing a diaper.

In the disposable diaper of the above embodiment, the features of the elastic body unit of the present invention are exhibited, and a state in which a firm elastic body strand is attached can be obtained.

In addition, the elastic body unit used in the diaper shown in Fig. 2 has elastic body strands installed in parallel with a gap between them, and since there is a sufficient gap between the elastic body strands, it is possible to use a wide band-shaped elastic body. Compared to the case where the elastic body is attached, the air permeability of the elastic body attachment part is excellent.

Therefore, in the above-mentioned diaper, it is possible to obtain a good waist sealing effect and also to prevent the elastic body attached portion from getting stuffy. Although disposable diapers are shown above as an example of clothing, the clothing to which the present invention is applied is not limited to this, and may also be diaper covers, underwear, etc. Furthermore, the elastic body unit of the present invention can be used not only for clothing but also for providing a gathering effect to base fabrics for general industrial use.

In addition, although the example in Fig. 2 shows an example in which the tape piece of the elastic body unit is adhered to the water-sealing sheet of a disposable diaper, the elastic strands of the elastic body unit are also attached to the water-sealing sheet in the length direction all over or in part. It is desirable that the adhesive be bonded in pitches, so that the water-sealing sheet follows the shrinkage of the elastic strands, forming fine folds and folding, thereby forming fine gathers at the elastic body attached portion.

5 is a perspective explanatory view showing an elastic body unit manufacturing apparatus according to the present invention, FIG. 6 is a schematic side view showing an example in which the elastic body unit manufacturing apparatus according to the present invention is incorporated into a disposable diaper manufacturing line, and 29 is a Elastic strand winding roll, 36
, 36a indicate holding tapes, respectively. Above the water-sealing sheet 3, a pair of feed bells 23, 23a are rotated and run in a direction B' opposite to the water-sealing sheet running direction B in a state substantially parallel to the water-sealing sheet 3. belt 2
3. On the surface 23a, elastic body hooking pins 24 are installed at a certain pitch. In this embodiment, the elastic strand E is wound around the feed belt 23. During winding, the elastic strand E fed out from the elastic strand winding roll 29 is placed on the tension roller 32a at a predetermined distance. After adjusting to the extended state, it is introduced from the axis of the winding arm 27 and guided to the tip of the arm 27. Arm 2
7 is configured to go around the outer circumference of the feed belt 23.23a as shown by K, and as the arm 2f goes around the rotating and running feed belt 23.23a, it is fed out from the tip of the arm. The elastic strand E is stretched between the feed belts 23, 23a in a zigzag pattern.

On the other hand, a pair of presser tape feeding mechanisms are installed on the upper and lower surfaces of the feed belt 23.23a, respectively, and the presser tape 36.3 is mounted on the upper and lower surfaces of the zigzag-shaped tensioned elastic body.
6a is attached. That is, the presser tape 36
, 36a are given a predetermined tension in the process of passing through a group of rollers incorporating dancer rollers 38 and 38, respectively, and then coated with adhesive S on their inner surfaces and guided by the presser roller 39 section to form a zigzag shape. Attach to both ends of the upper and lower surfaces of the tensioned elastic body. The inner pressing tape 36 may be attached in the moving direction of the zigzag-shaped tensioned elastic body as described above, but it may also be attached from a direction perpendicular to the moving direction. In this case, the holding tape covers not only both ends of the zigzag-shaped tensioned elastic body but also the entirety thereof. However, the adhesive may be attached only to both ends.

The zigzag-shaped tensioned elastic body to which the presser tape is attached in this way is fed to its end by the feed belts 23, 23a, and the rotary set side cutter 34 cuts off both ends of the elastic body closer to the end than the area to which the presser tape is attached. At the same time, it is cut into predetermined lengths in the longitudinal direction by a rotary cutting mechanism.

Here, the upper/lower pressure type cutting mechanism will be further explained based on FIG. It consists of an upper blade 42 arranged opposite to a support roller 41. A lower blade 43 is attached to the support roller 41 at the rear end in the rotational direction of the perforated curved lid 40, and the upper blade 42 is attached to the lower blade 43. The holding tape 36, 36a and the zigzag-shaped tensioning elastic body E are pressed between them by rotation.
It is configured to cut. - The force support roller 41 rotates at a speed matching the running speed of the feed belts 23, 23a from the time when the starting end of the perforating curve i40 reaches the apex until the lower blade 43 reaches the apex as shown in the figure. (more precisely, after the upper blade 42 completes cutting by rotation), it rapidly rotates to the position shown by the two-dot chain line in the figure, and from there a small piece of presser tape with an elastic body (elastic body unit) is attached to the water-sealing sheet 3. ) The water-sealing sheet rotates in synchronization with the running speed until F is delivered, and when the delivery is completed, the perforated curved lid 4
It rapidly rotates again until the starting end of 0 reaches the apex.

As described above, when the zigzag-shaped tensioned elastic body to which the presser tape is attached is fed by the feeding belt 23.23a to the cutting mechanism exhibiting such a configuration and movement, the tensioned elastic body passes through the perforated portion. The receiver rides on the perforated curved lid 40, which exerts a downward suction force, and is sucked, and its end is passed onto the support roller. At this time, the rotary side cutter 34 sequentially cuts both ends of the tensioned elastic body. When the support roller 41 rotates to the illustrated position, the upper blade 42 rotates and cuts the zigzag-shaped tension elastic body E and the presser tapes 36, 36a. As a result, an elastic body unit (a small piece of presser tape with an elastic body) F having a predetermined length when viewed in the presser tape traveling direction is formed. Next, the elastic body unit F rotates rapidly together with the support roller 41 while being attracted to the perforated curved lid 40, and reaches the position shown by the two-dot chain line. Then, by being pinched by the support roller 41 and the seal roller 44, it is affixed to the adhesive-coated portion of the water-sealing sheet 3 coated with adhesive to a predetermined width, and is transferred from the support roller 41 onto the water-sealing sheet 3. handed over. Incidentally, the suction of the sharpening support roller 41 on the perforated paddy curved lid 40 is released. When the delivery of the elastic body unit F is thus completed, the support roller 41 rapidly rotates to the starting position, resumes suction, and captures the tip of the next zigzag-shaped tensioned elastic body E, as described above.

By the above method, the elastic unit F is attached to the water-sealing sheet 3 at a predetermined position (adhesive application position) as shown in FIG.
can be stretched. In the manufacture of disposable diapers, the water-sealing sheet to which the elastic body unit F is attached is fed to the nipping portion of turning rollers 14 and 19 shown in FIG. 4.

The basic configuration of the present invention is as shown in the above-mentioned embodiments, but in the present invention, as described above, there is no particular restriction on the sheet to which the filamentous elastic body is attached, and in the case of manufacturing disposable diapers, water-tight Either a sheet or a water-permeable sheet (nonwoven fabric) may be used. It goes without saying that the elastic body unit and its manufacturing apparatus of the present invention can be applied to fields other than the manufacture of disposable diapers, and there is no particular restriction on the number of thread-like elastic bodies attached in the width direction of the sheet. It is desired that the number is about 1 to 10, more preferably about 2 to 5. However, if the elastic body is a narrow band-like body, it is generally sufficient that the number of attached pieces is smaller than the above number.

By the way, in the device of the above embodiment, as is clear from FIG. 8, the elastic body E is not stretched in a direction perpendicular to the direction of travel, but slightly stretched in the direction perpendicular to the direction of travel. It is installed in an inclined position. Therefore, when this is attached to the water-sealing sheet 3 or the water-permeable sheet 2, the wide portion W of the diaper 1 becomes slightly inclined with respect to its edge (X-X line cut section). - Even if the attached state is slanted like this, there is no particular problem because the practical effect of exerting the gather effect can be sufficiently obtained, but there is an aspect where the aesthetic appearance is lacking and the product value decreases. It is also possible that this could be the cause. That is, if possible, it is desirable to attach a plurality of elastic body strands E so that they are all parallel to the edge of the wide portion W.

FIG. 9 is an explanatory plan view showing a modification of the elastic body unit manufacturing apparatus improved to meet the above request, and FIG. 10 is a side view of the same. This device adopts the same configuration as the device shown in , but the surfaces of the feed belts 23c to 23f, which are provided in two stages on both sides, are not planted firmly on the surface, and moreover, there are no pins planted on the outer periphery of the feed belts 23c to 23f. A pair of upper and lower presser belts 26a sandwiching the center position in the width direction correspond to the feed belts 23c to 23f.
, 26b and presser belts 26c, 26d are provided in contact with the feed belts 23c to 23f, respectively. That is, as the arm 27 rotates, the elastic strand E arranged in a zigzag pattern between the feed belts 23c to 23f is transferred to the downstream side as the feed belts 23c to 23f advance, and is eventually connected to the feed belts 23c and 23e and the presser foot. Belt 28a
, 26b, feed belts 23d, 23f, and presser belts 26c, 26d, and enter into a transport mode.

In such an elastic strand tensioning mechanism, in this embodiment, the running speeds of the upper presser belt 26a and the lower presser belt 26b, which contact the feed belts 23c and 23e, are Va and Vb, respectively, and the running speeds of the upper presser belt 26a and the lower presser belt 26b, which contact the feed belts 23d and 23f, are set to Va and Vb, respectively. When the running speeds of the upper presser belt 26c and the lower presser belt 26d are Vc and Vd, respectively, Va=Vd, V
The feed belt 23 is adjusted so that b=Vc and Va<Vc.
c Adjust the running speeds of ~23f and presser belts 26a~26d, respectively. As a result, the feed belts 23c, 23
The elastic strands sandwiched between the e sides are in a state where the upper side is delayed and the lower side is advanced;
The elastic body strands sandwiched between the d and 23f sides are in a state where the upper side progresses and the lower side progresses slower. As a result, among the elastic strands diagonally stretched between the feed belts 23c to 23f, the upper side is stretched as shown in the figure, as the progress of the feed belt 23c side becomes slower and the progress of the feed belt 23d side becomes faster. The state gradually changes from an oblique state to a state perpendicular to the belt traveling direction. On the other hand, on the lower side, the feed belt 23e side advances faster, and the feed belt 23f side lags behind, changing to a state that is perpendicular to the belt traveling direction. Here, in order to accurately change the tension state of the elastic strand from an oblique state to a state perpendicular to the belt traveling direction, V a - V d must be a constant value derived from the rotation speed of arm 2, etc. It is necessary to set it to .

That is, the elastic strand E, which has been moved in parallel in a zigzag pattern by the feed belts 23c and 23d, is held by the holding tape 36, and then moved by the rotary cutter 34. When attaching the elastic body unit F produced by cutting with the upper blade 42 or the like onto the water-sealing sheet 3, when the number of units supplied from the arm 27 is one, the running speed Va of the presser belts 26a to 26d
~Vd must be set to a value expressed by the following relational expression.

Va=2N −P −=(1) vd=2N−p −−−−−−(2) Va=Vd
-a -S ----(5) Rearranging equations (1) to (5), VaxVbsg2N -Pxa -s, Ki VaxVd: Presser belt running speed N: Arm rotation speed P: Pitch 1: Elastic strand winding Distance a from the rotation start point to the tape nip point: Gear width S: Number of diapers produced per unit time Note that the above example shows the case in which the arm 27 wraps the belt one by one, but multiple diapers are wound at once. It is also possible to attach it.

Vas=Vdm2 ・n −N−Pxa −Sμ By employing the above control, the elastic strand attached to the wide portion of the diaper is
can be made parallel to the above, and can increase the product value.

FIG. 11 is a schematic plan view showing another embodiment of the device of the present invention, and FIG. 12 is a schematic side view of the same, where 3 means a water-sealing sheet running in the direction of the arrow. For convenience of understanding, the water-sealing sheet 3 is shown in an inclined running state in the figure. A pair of dog-legged feeding belts 23 rotating in the direction of arrow B are disposed above the water-sealing sheet 3 symmetrically with the water-sealing sheet 3 in between and facing downward in the direction of travel.
On the belt surface of the dogleg-shaped feed belt 23, pins 24 for fixing elastic members are installed at partial pitches. Note that a commercially available timing belt or the like can also be used as the feed belt. On the other hand, on the outer periphery of the most downstream part (left side in the drawing) of the dogleg-shaped feed belt 23, presser pads 25 are attached at a partial pitch so as to fit between the feed belt installation bins 24.
A pair of presser belts 26 are arranged and rotate in the direction of arrow C. In such a belt mechanism, an arm 27 is disposed on the upstream side (right side in the drawing) of the feed belt 23 and rotates around the outer periphery of the two feed belts 23 by the rotation of the motor M.
An elastic strand wrapping roll 29 that rotates together with the rotating shaft 28 is attached to a rotating shaft 28 that is a support shaft of the arm 27, and an elastic strand E that is unwound from the elastic strand wrapping roll 29 is attached to the tip of the arm 27. A pull-out hole 31 is provided for pulling out. Note that 32 indicates a tension applying device that applies tension to the elastic strand E. Further, numeral 33 indicates an elastic body pressing member, and numeral 34 indicates a rotary cutter.

When attaching the elastic body E to the water-sealing sheet 3 using the above-mentioned device, the water-sealing sheet 3. Dogleg shaped feeding belt 23. The presser belt 26 is run or rotated in the directions of arrows A, B, and C, respectively, and the arm 27 is rotated by the rotation of the motor M, and the elastic strand E fed out from the winding roll 29 is held in position by the pin 24. It is stretched between the doglegged feeding belts 23 while regulating the feeding belts.

In the illustrated example, a conical guide 30 is disposed on the upstream side of the dogleg-shaped feed belt 23 at the start of winding the elastic strand E so that the conical top is oriented in the traveling direction.
As shown in Figure 2, the winding length of the elastic body strand E is ensured. Next, the stretched elastic strand E is fed eight times downstream as the feed belt 23 runs, reaches its tip, and is held between it and the presser belt 26.

The elastic strands E held and stretched are attached to the water-sealing sheet 3 at a predetermined pitch.

That is, when attaching, when the adhesive-coated surface of the water-sealing sheet 3 coated with adhesive in the width direction reaches the lower part of the tensioned elastic strand E held at both ends, the presser member 33 is lowered to attach the adhesive. Elastic strand E stretched on adhesive application surface 5
Press the While maintaining the pressed state, the rotary cutter 34 is advanced while rotating to cut both ends of the elastic strand that is not pressed, completing the installation. It is preferable to apply silicone treatment to the pressure contact surface of the pressing member 33 to prevent adhesive from adhering thereto, or a release paper may be sandwiched between the pressing member 33 and the elastic strand. In addition, the pitch at which the adhesive is applied to the water-sealing sheet 3, that is, the pitch at which the filamentous elastic bodies are attached in the longitudinal direction of the sheet, is set at a short pitch and a long pitch because the attached positions are on both sides of the cutting line x-x as shown in FIG. are repeated alternately. Therefore, in order to attach the elastic strands E at the pitch shown in FIG. 13 to the water sealing sheet 3 traveling at a constant speed, the feed belt 23 is
．． Presser belt 26. It is necessary to intermittently travel or rotate the filamentous elastic body winding arm 27 in accordance with the attachment pitch. Therefore, in this embodiment, a step motor (servo motor: not shown) is used for the intermittent running or intermittent rotation.

On the other hand, unlike the above embodiment, as shown in FIG. 14 (a plan view equivalent to FIG. 11), elastic strands are wound around the feed belt in advance at the same pitch as the attached pitch, and the belt is wound around the water-sealing sheet 2. 23 and the presser belt 26 can also be set to a constant speed. That is, in this case,
Feed belt 2 is used to adjust the attachment position of the elastic body strand.
3 and the presser belt 26 do not need to run intermittently, and only need to be run at a constant speed, the bell, towing mechanism, etc. can be simplified, and operational troubles can be reduced. In this embodiment, when winding the elastic strand E around the feed belt 23, the arm 2
It is necessary to rotate the motor 7 at a speed such as fast in the attached section M and slow in the crossing section N, and such a rotation mode can be easily obtained by using the step motor.

[Effects of the Invention] The present invention is configured as described above, and it is possible to obtain an elastic body unit that is excellent in handleability and attachment stability when giving a gather effect to clothing or other base materials, and that By attaching the body unit, it was possible to obtain a garment that exhibits a stable gathering function.

Furthermore, it was possible to provide an elastic body unit manufacturing apparatus comprising a winding means, a winding means, a tape piece attachment means, a cutting means, etc., and succeeded in manufacturing the elastic body unit rationally.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are perspective explanatory views showing an example of the elastic body unit of the present invention, FIG. The figure is a partially cutaway perspective view showing the structure of a disposable diaper, FIG. 4 is a schematic explanatory view showing a conventional disposable diaper manufacturing method, FIG. 5 is a perspective explanatory view showing an elastic body unit manufacturing apparatus of the present invention, and FIG. Fig. 7 is an enlarged explanatory view of the upper/lower pressure type cutting mechanism, and Fig. 8 shows the state of adhering small pieces to the water-sealing sheet. Plan explanatory drawing, No. 9゜11.1
3 is a plan view showing another embodiment, No. 10.12.
FIG. 14 is a side view of the same. 1...Diaper 2...Water permeable sheet 3...
Water-sealing sheet 4...Water absorber 23...Feeding belt
26... Presser belt 27... Arm 29... Elastic body strand winding roll 32... Tension applying device 33... Presser member 34... Rotary cutter 36. 37... Presser tape 38. ... Dancer roller 40 ... Perforated curved M 41 ... Support roller 42
...Upper blade 43...Lower blade 44...Seal roller Fig. 2 Fig. 7 Fig. 11 Fig. 12 J ゝ) Fig. 13 M 14゛Fig.

Claims (4)

[Claims] (1) An elastic body unit characterized in that a plurality of elastic body strands are installed between a pair of spaced apart tape pieces with both ends attached to the tape pieces. (2) An elastic strand conveying means that is provided with a large number of elastic strand engaging portions in the longitudinal direction and in which conveying members that advance in the longitudinal direction are arranged to face each other, and an elastic strand delivery portion that is connected to the elastic body. an elastic strand winding means that wraps the elastic strand around the strand conveying means and spans the elastic strand between the pair of conveying members; An elastic body unit manufacturing apparatus comprising: an attaching means for attaching a piece of tape to both ends; and a cutting means for cutting both ends of an elastic body strand. (3) The tape piece of the elastic body unit has a plurality of elastic strands installed between a pair of spaced apart tape pieces with both ends attached to the tape piece, and the tape piece is attached to the surface of the base material. A garment characterized in that the elastic strand is attached in a stretched state. (4) The garment according to claim 3, wherein the base material is a water-sealing sheet or a water-permeable sheet for a disposable diaper.