JP6704605B2 - Wrinkle straightening device - Google Patents

Description

The present invention relates to a wrinkle straightening device. More particularly, it relates to a wrinkle straightening device used for straightening wrinkles formed on a continuously conveyed web such as paper, nonwoven fabric and film.

In a printing machine, production line for diapers, films, cloths, non-woven fabrics, etc. (hereinafter referred to as production line, etc.), processing and printing are performed by continuously flowing a strip-shaped sheet (web) unwound from a raw roll. Be seen.

However, when the web as described above is continuously flowed (running), the rate of wrinkling of the web during running is high due to changes in tension in the width direction during running, habits of raw materials, and the like. When such wrinkles occur, the width of the web becomes shorter than the specified width due to the wrinkles. Since a product using a web having a width shorter than the regulation becomes a defective product, it is necessary to stop the production line or the like to solve the problem, and the production of the product is stopped. In particular, in the case of a paper diaper or the like which is produced at a high speed, the running speed of the web is so high that the wrinkling of the web is a serious problem. Further, if the width of the web is wide, wrinkles are likely to occur even if the traveling speed is slow, and therefore, the problem of wrinkles frequently occurs in the production line and the like in proportion to the wide width of the web. For example, since the width of the web of an adult paper diaper or the like is relatively wide, the tension on the left and right of the web is easily disturbed, and the rate of wrinkling of the web during running increases.

Here, there are some types of webs that are easily wrinkled and some that are less likely to wrinkle. If a web that is less likely to be wrinkled is used, the above-mentioned problem of wrinkling is less likely to occur. However, there is a circumstance that a web that is prone to wrinkles has a low price, and a web that is difficult to wrinkle is expensive. Therefore, if a web that does not easily generate wrinkles is used, the problem of wrinkles can be prevented, but the raw material cost and the manufacturing cost also increase. Even if a wrinkle-prone web (inexpensive web) is used, if a product that is comparable to a wrinkle-prone web (expensive web) can be manufactured, it can be purchased as a raw material. Since the range is widened, raw material costs can be held down and manufacturing costs can be held down. In particular, in the production of disposable diapers, a plurality of non-woven fabrics are used one on top of another, so that it is possible to significantly reduce the production cost of a product even by suppressing the raw material cost of one non-woven fabric.

However, in the production of disposable diapers, if wrinkles are generated in one nonwoven fabric, all the nonwoven fabrics are wasted, and the yield is greatly deteriorated. For this reason, in the production of disposable diapers, it is necessary to use a web in which a plurality of non-woven fabrics are less likely to be wrinkled, and the manufacturing cost is high.

In order to solve such a problem, a technique for removing wrinkles of a moving web has been developed.

Patent Documents 1 to 4 disclose a device for stretching a wrinkle of a web in contact with a roll by providing a spiral groove on the surface of the roll or providing a curved expander roll. The device cannot obtain the sufficient effect of straightening wrinkles.

Further, Patent Document 5 discloses a wrinkle removing roll provided with a large number of rod-shaped rubbers on the outer circumference of the roll. The wrinkle removing roll is configured such that a large number of rod-shaped rubbers repeatedly expand and contract along the roll longitudinal direction every one rotation of the roll.
Therefore, it is described that when the web is placed on the roll along the outer periphery of the roll from the contracted portion to the stretched portion of the rod-shaped rubber, the wrinkles of the web can be removed by the friction between the rod-shaped rubber and the web. That is, in the technique of Patent Document 5, when the rod-shaped rubber is stretched, the web is also stretched in the width direction, so that the wrinkles of the web can be removed.

Japanese Utility Model Publication No. 4-60964 JP-A-8-268608 JP, 2005-247475, A JP 2012-188188 A JP, 2011-126607, A

However, in the wrinkle removing roll of Patent Document 5, since the expanding and contracting bar-shaped rubber is in contact with the web, the bar-shaped rubber is bent outward by the centrifugal force by an amount corresponding to the rotation speed of the roll. The tensile force resulting from this bending is also applied to the web, but this amount of bending changes according to the rotational speed of the roll (that is, the running speed of the web). That is, when the wrinkle removing roll of Patent Document 5 is used, even if the distance in which the web is in contact with the roll can be set to the same length when the traveling speed of the web is changed, it is caused by the bending of the rod-shaped rubber. , The tension applied in the width direction of the web changes. Therefore, even with the technique of Patent Document 5, the wrinkle of the web can be extended, but if the traveling speed of the web changes, the tension applied in the width direction of the web changes, so that the quality of the web is kept constant. It's difficult.

In view of such circumstances, it is an object of the present invention to provide a wrinkle straightening device capable of straightening wrinkles formed on a web and maintaining the quality of the web constant even if the traveling speed of the web changes. And

A wrinkle stretching device of a first aspect of the invention is a device for stretching the wrinkles of a web that is continuously conveyed, comprising a support shaft and a rotary roll rotatably provided around the support shaft, The rotating roll includes a pair of widening rolls, and each widening roll is a plurality of rolls arranged so as to form an inclined columnar roll that is rotationally symmetrical with respect to the support shaft and coaxial with the support shaft. And a holding member for holding a distance between the contact member and the support shaft at a predetermined distance. The holding member of the widening roll is rotatably provided with respect to the support shaft. In addition, a rotation plate to which the end portions of the plurality of contact members on the central portion side are connected to the outer peripheral edge, and the rotation shaft is rotatably provided with respect to the support shaft, and the rotation shaft with respect to the support shaft. The inclined rotation plate, which is provided so as to have a predetermined inclination angle, is connected to the outer peripheral edge of the outer end portions of the plurality of contact members, and the pair of widening rolls, It is substantially plane-symmetric with respect to a plane of symmetry orthogonal to the support axis, and the ends of the central portions of the plurality of contact members of each widening roll are arranged so as to overlap each other in the rotation direction of the rotating roll. In addition, it is characterized in that there is no gap between the side peripheral surfaces of the contact members that are adjacent to each other in the axial direction of the support shaft and that contact the web.
In the wrinkle straightening device of a second invention, in the first invention, the rotating plate of the holding member is an inclined rotating plate provided in parallel with the inclined rotating plate, and the plurality of contact members are formed by an O-ring. Fixed to the outer peripheral edge of the inclined rotary plate to which the outer ends of the plurality of contact members are connected, and the outer peripheral edge of the inclined rotary plate that is the rotary plate of the holding member. To do.
In the wrinkle straightening device of a third aspect of the present invention, in the first aspect, the rotating plate of the holding member is provided at a central portion in the axial direction of the rotating roll so as to be orthogonal to the supporting shaft and rotatable with respect to the supporting shaft. It was a central plate, a plurality of contact members in said pair of widening rolls, so that the end located at the center side in the axial direction of the rotating roll, becomes movable along the axial direction of the support shaft And is held by the central plate.
In the wrinkle straightening device of a fourth aspect of the invention, in the third aspect of the invention, the plurality of contact members of each widening roll are provided with a protrusion on the central portion side in the axial direction of the rotating roll, and the center plate has the contact member. Is provided with a plurality of through-holes into which the protrusions are inserted.
A wrinkle straightening device according to a fifth aspect of the present invention is the wrinkle straightening device according to any one of the first, second, third, or fourth aspects, wherein the plurality of contact members include a contact portion that is formed in a substantially flat surface on the side opposite to the support shaft. Characteristic.
In the wrinkle straightening device of a sixth invention, in the first invention, the rotating plate of the holding member is an inclined rotating plate provided in parallel with the inclined rotating plate, and the plurality of contact members have a circular cross section. The contact member is formed of a shaft-shaped member, and an end edge of the contact member has an outer peripheral edge of an inclined rotating plate to which an outer end of the contact member is connected by a shaft-end connecting member, and a rotation of the holding member. The shaft end connecting member is rotatably connected to the outer peripheral edge of the inclined rotary plate, and its rotation axis is parallel to the rotary axis of the inclined rotary plate. and disposed the base end portion so as to be characterized in that the central axis of the contact member is provided with a tip for holding such that the rotary shaft and the parallel portion of the rotating roll.
The wrinkle straightening device of a seventh invention is the wrinkle straightening device according to the sixth invention, wherein the plurality of contact members have recessed portions at both ends, which are recessed from the both ends, and a tip portion of the shaft end connecting member has the recessed portion. It is characterized in that it is provided with an insertion shaft for inserting into the section, and the insertion shaft is provided so that its central axis is parallel to the central axis of rotation of the rotary roll.
The wrinkle straightening device of an eighth invention is the wrinkle straightening device according to any one of the second to seventh inventions, which has a plurality of inclined portions to which the inclined rotation plate is rotatably attached, and the inclined portion has a central axis thereof as described above. It is characterized in that it is inclined with respect to the central axis of rotation of the rotating roll.
A wrinkle straightening device of a ninth aspect of the present invention is characterized in that, in any one of the first to eighth aspects of the invention, the wrinkle straightening device is provided with a swinging unit that swingably holds the rotary roll in an axial direction of the rotary roll. .

According to the first aspect of the invention, since the pair of widening rolls of the rotating roll are formed in the inclined columnar shape, the overlap of the contact members of the pair of widening rolls changes along the circumferential direction of the rolls. Moreover, in the pair of widening rolls, the ends of the central portion in the axial direction of the support shaft are overlapped with each other, and moreover, between the side peripheral surfaces in contact with the web of the contact members of the widening rolls in the axial direction of the support shaft. It is provided so that there is no gap. Therefore, if the web is wound in a section where the overlap between the contact members of the pair of widening rolls is large to the state where the overlap is small, the web is wound in the width direction by the contact members of the pair of widening rolls in the wound portion. Tension can be applied outward. Therefore, even if the web is wrinkled along the conveying direction, the wrinkles can be extended. Further, since both ends of the contact member are held by the rotating plate and the inclined rotating plate of the holding member, it is possible to keep the contact member at a predetermined distance from the support shaft even when rotating at high speed. it can. That is, the contact state between the web and the contact member can be maintained in substantially the same state regardless of the traveling speed of the web. Therefore, even if the web is traveling at high speed or the speed of the web fluctuates, almost constant tension can be applied to the web, so that the wrinkles can be stably extended and the quality of the web is kept constant. be able to. Further, the tension applied to the web can be adjusted by adjusting the tilt angle of the tilt rotation plate with respect to the support shaft.
According to the second aspect of the present invention, the contact member can be connected to the rotary plate and the inclined rotary plate with a simple structure.
According to the third aspect of the present invention, the contact member can be held in a stable state by holding the end portion of the contact member of each widening roll on the central portion side of the rotating roll by the center plate. Moreover, since the central plate holds the contact member so that it can move along its axial direction, the function of widening the web by the contact member is maintained. Further, since the central plate is provided, each widening roll need only be provided with a holding member that holds the outer end portion of the contact member, so that the structure of the rotating roll can be simplified.
According to the fourth aspect of the present invention, it is possible to more reliably prevent the contact plates from coming off the central plate while ensuring the axial movement of the contact members.
According to the fifth aspect, the friction between the one contact member and the web can be increased, so that the tension applied from the one contact member to the web can be increased. Further, since the area of contact of one contact member with the web can be increased, the number of contact members to be provided can be reduced. Then, the mechanical loss when the rotary roll rotates can be reduced.
According to the sixth aspect, since the shaft-shaped member having a circular cross section is used as the contact member, it becomes easy to bring the web and the contact member into contact with each other on the surface. Moreover, as the pair of widening rolls rotates, the contact member comes into contact with the web while rotating, so that the friction generated between the web and the contact member can be reduced.
According to the seventh aspect of the present invention, the contact member can be connected to the inclined rotation plate so that the central axis is parallel to the rotation axis of the rotating roll by inserting the insertion shaft into the recess of the contact member. Easy to assemble.
According to the eighth aspect of the invention, since the rotation of the inclined rotary plate can be supported by a general bearing, the inclined rotary plate can be rotated in a stable state.
According to the ninth aspect, even if the tension along the web conveying direction is different in the width direction of the web, the swinging unit can swing the rotating roll so as to reduce the difference in tension. Therefore, even if the tension along the conveyance direction is different in the width direction of the web, the tension applied in the width direction of the web can be made substantially uniform across the symmetry plane. Can be stretched.

It is a schematic plan view of the wrinkle straightening device 1 of this embodiment. It is a schematic side view of the wrinkle straightening device 1 of this embodiment. It is a schematic sectional drawing of the wrinkle straightening apparatus 1 of this embodiment. It is a part drawing of the wrinkle straightening device 1 of this embodiment, (A) is a schematic explanatory drawing of the left contact plate 11, (B) is a CC sectional view taken on the line of (C), (C). 8A is a schematic explanatory view of the left tilt rotation plate 13. FIG. It is explanatory drawing of the overlapping of the left and right plates 11 and 12, (A) is a view on arrow X of FIG. 3, (B) is a view on arrow Y of FIG. 3, and (C) is a circumferential position ( It is a schematic explanatory drawing of the change of the overlap with respect to (angle). It is a schematic explanatory drawing of the work|work which extends the wrinkle of the web W by the wrinkle extending|stretching apparatus 1 of this embodiment, (A) is a side view, (B) is a top view. It is a schematic sectional drawing of the wrinkle straightening apparatus 1 of other embodiment. FIG. 8 is a schematic cross-sectional arrow view of the rotary roll 10 taken along the line BB of FIG. 7. It is a part drawing of the wrinkle straightening device 1 of this embodiment, (A) is the outline 1 schematic explanatory drawing of the left contact plate 11, (B) is the schematic explanatory drawing of the left contact plate 11, (C) is. It is a schematic explanatory drawing of the center plate 15. It is a schematic explanatory drawing of the left inclination rotation plate 13 of other embodiment, (A) is CC sectional view taken on the line, (B) is a front view. It is a schematic perspective view of the wrinkle straightening apparatus 50 of other embodiment. It is a schematic perspective view of the rotation roll 60 of the wrinkle straightening apparatus 50 of other embodiment. It is a schematic explanatory drawing of the rotation roll 60 of the wrinkle straightening apparatus 50 of other embodiment, (A) is a side view, (B) is a schematic sectional drawing. It is a schematic sectional drawing of the rotating roll 60 of the wrinkle straightening apparatus 50 of other embodiment. (A) is a single perspective view of a support shaft 53 of a wrinkle straightening device 50 of another embodiment, and (B) is a schematic perspective view of a state in which only the inclined rotation plates 63, 64 are attached to the support shaft 53. It is a schematic perspective view of the connection member 55 of the support shaft 53 of the wrinkle straightening device 50 of other embodiment.

Next, an embodiment of the present invention will be described with reference to the drawings.
The wrinkle stretching device of the present invention is a device for stretching wrinkles formed along the web conveying direction, and is capable of stably stretching wrinkles even when the traveling speed of the web changes. It has features.

The web to which the wrinkle straightening device of the present invention is applied is not particularly limited. For example, the wrinkle-stretching device of the present invention can be used for wrinkle-stretching a web such as a nonwoven fabric, paper or film. In particular, it can be used as a device for straightening the wrinkles of a web moving at a high speed (for example, 100 m/min or more).

(Explanation of usage of wrinkle straightening device 1)
First, before describing the details of the wrinkle straightening device 1 of the present embodiment, an outline of the usage situation of the wrinkle flattening device 1 of the present embodiment will be described.

The wrinkle straightening device 1 of this embodiment is used in a state as shown in FIG.
In FIG. 6, the symbol W indicates the web to be the target for straightening wrinkles.
The wrinkle straightening device 1 of the present embodiment includes a rotating roll 10 around which the web W is wound. The rotating roll 10 is rotatably held by the base frame 2 via a support shaft 3. Moreover, when the rotating roll 10 rotates together with the web W, a force (see an arrow in FIG. 6B) that moves the web W outward in the width direction with respect to the web W can be applied to the web W. It has a unique structure.

Therefore, when the web W is conveyed, the rotating roll 10 rotates while its outer surface is in contact with the surface of the web W. As described above, the rotating roll 10 has a structure capable of applying a force to the web W so as to move the web W outward in the width direction when it is rotated. Therefore, when the rotating roll 10 rotates while being in contact with the surface of the web W, the web W is stretched in the width direction, so that even if wrinkles S are formed along the transport direction of the web W, the wrinkles are formed by the rotating roll 10. S can be extended.

(Explanation of wrinkle straightening device 1)
Next, the structure of the wrinkle straightening device 1 of the present embodiment will be described.
As described above, the wrinkle straightening device 1 of the present embodiment includes the rotating roll 10, the support shaft 3 to which the rotating roll 10 is attached, and the base frame 2 to which the support shaft 3 is attached.

(Base frame 2)
As shown in FIG. 1, the base frame 2 is a member formed in a substantially U shape in a plan view, and includes a pair of holding plates 2a and 2b and a base plate 2c that connects the holding plates 2a and 2b. , Are provided.
The shape of the base frame 2 may be any shape as long as it can rotatably hold the rotating roll 10 via the support shaft 3, and is not limited to the above-described shape. For example, the base frame 2 may have a structure in which only a pair of holding plates 2a and 2b are provided and the base plate 2c is not provided, or only one holding plate (for example, only the holding plate 2a) or one holding plate and the base plate. It is also possible to provide only 2c and hold the support shaft 3 in a cantilever state.

(Support shaft 3)
As shown in FIGS. 1 and 3, a support shaft 3 is provided between the holding plates 2 a and 2 b of the base frame 2. The support shaft 3 connects the rotating roll 10 to the base frame 2 so as to be rotatable. Specifically, the rotating roll 10 is attached to the support shaft 3 so as to be rotatable with respect to the support shaft 3 (in other words, rotatable with respect to the base frame 2). The method of connecting the rotating roll 10 so as to be rotatable with respect to the support shaft 3 is not particularly limited. For example, as will be described later, it is possible to employ a method in which the inclined roll plates 13 and 14 of the rotary roll 10 are provided with bearings B and the rotary roll 10 itself rotates with respect to the support shaft 3.

(Rotating roll 10)
As shown in FIGS. 1 and 3, the rotary roll 10 includes a pair of widening rolls 10A and 10B. That is, the widening roll 10A having the plurality of contact plates 11 and the pair of inclined rotation plates 13 and 13 and the widening roll 10B having the plurality of contact plates 12 and the pair of inclined rotation plates 14 and 14 are provided.
The plurality of contact plates 11 and the plurality of contact plates 12 correspond to the contact members in the claims.

As shown in FIGS. 1 and 3, the pair of widening rolls 10A and 10B have substantially the same structure. Specifically, each of the pair of widening rolls 10A and 10B is provided such that the central axis thereof is coaxial with the support shaft 3. Then, the pair of widening rolls 10A and 10B have their side peripheral surfaces (virtual cylindrical surfaces IS of substantially cylindrical shape formed by connecting the outer end surfaces of the contact plates 11 and 12; see FIG. 2) parallel to the support shaft 3. Is provided.

Further, in the pair of widening rolls 10A and 10B, the ends of the central portion in the axial direction of the support shaft 3 are overlapped with each other, and further, in the axial direction of the support shaft 3, a gap is not formed between the side peripheral surfaces thereof. It is arranged. Moreover, the pair of widening rolls 10A and 10B are arranged so as to be substantially plane-symmetric with respect to the plane of symmetry SP orthogonal to the support shaft 3 (note that in FIG. 1 and FIG. 3, the plane of symmetry SP is the support shaft). It becomes a surface that makes 3 equal.)

With such a configuration, as shown in FIGS. 1, 3 and 5, in the pair of widening rolls 10A and 10B, the end portions of the central portions of the contact plates 11 and 12 of the pair of widening rolls 10A and 10B are mutually in the rotational direction of the rotary roll 10. It is arranged so as to overlap. Moreover, the overlapping length L is changed along the circumferential direction from the portion having the largest overlap (the position of arrow Y in FIG. 3) to the portion having the smallest overlap (the position of arrow X in FIG. 3). become. That is, between the position of the arrow X and the position of the arrow Y, the contact plates 11 and 12 of the pair of widening rolls 10A and 10B move so as to be separated from each other.

Therefore, when the rotating roll 10 is brought into contact with the web W as described below, the rotating roll 10 rotates as the web W runs, and the tension is applied to the web W outward in the width direction with the rotation. Can be added. The tension allows the wrinkles S formed along the transport direction of the web W to be stretched.

First, when the rotating roll 10 rotates as the web W travels, the rotating roll 10 contacts the web W between the position θ1 and the position θ2 in FIG. Wrap it around. That is, when the rotating roll 10 rotates as the web W travels, the overlap between the contact plates 11 and 12 of the pair of widening rolls 10A and 10B gradually narrows (that is, the contact plates 11 and 12 are separated from each other). The web W is wound around the rotary roll 10.

Next, the web W and the rotating roll 10 are aligned so that the plane of symmetry SP overlaps with the center line CL of the web W (that is, a line that bisects the web W in the width direction, see FIG. 6).

When the web W is run in this state, the rotary roll 10 rotates as the web W runs, and the web W is moved by the contact plates 11 and 12 of the pair of widening rolls 10A and 10B with the rotation. Tension can be applied outward in the width direction.

Then, even if wrinkles S are formed along the conveyance direction of the web W, since the web W is pulled in the width direction, the wrinkles S can be extended.

Moreover, even if the rotating roll 10 rotates and a centrifugal force is applied to the contact plates 11 and 12, the contact plates 11 and 12 are supported by the support shaft 3 by the pair of tilt rotating plates 13 and 13 and the pair of tilt rotating plates 14 and 14. The distance between and is maintained at a predetermined distance. Then, regardless of the traveling speed of the web W, the contact state between the web W and the contact plates 11 and 12 can be maintained in substantially the same state. Therefore, even if the web W is run at a high speed or the speed of the web W varies, the tension applied in the width direction of the web W can be made substantially the same, so that the quality of the web W can be kept constant.

Next, the structure of the pair of widening rolls 10A and 10B will be described in detail.
The pair of widening rolls 10A and 10B have substantially the same structure except that they are plane-symmetric with respect to the plane of symmetry SP, and therefore the widening roll 10A will be described below as a representative.

(Tilt rotation plate 13)
As shown in FIGS. 1 and 3, the widening roll 10A includes a pair of inclined rotation plates 13 and 13 attached to the support shaft 3. The pair of inclined rotary plates 13, 13 are disk-shaped members (see FIGS. 2 and 4). The pair of inclined rotary plates 13, 13 are attached to the support shaft 3 in a state of being inclined with respect to the support shaft 3 and parallel to each other. Moreover, the pair of inclined rotary plates 13, 13 are rotatably attached to the support shaft 3 via the bearing B. Specifically, the pair of inclined rotation plates 13 and 13 are rotatable with respect to the support shaft 3, but are attached to the support shaft 3 so that the rotation shaft is inclined with respect to the support shaft 3. Has been. Therefore, the pair of inclined rotation plates 13, 13 are always the same with respect to the support shaft 3 when viewed from a certain direction (for example, in plan view in FIGS. 1 and 3) while maintaining a state of being parallel to each other. It is possible to rotate while maintaining the tilt angle (for example, while maintaining the tilt angle in FIGS. 1 and 3).

As shown in FIGS. 2 and 4, a plurality of notches 13h are formed on the outer peripheral edge of each tilt rotation plate 13 so as to be rotated about the rotation axis 0 of the tilt rotation plate 13. .. The plurality of notches 13h are portions where the ends of the plurality of plates 11 described later are arranged.

Further, as shown in FIGS. 2 and 4, a groove 13g is formed along the circumferential direction on the outer peripheral edge of each inclined rotation plate 13. That is, the groove 13g is formed by providing a recess along the outer peripheral edge of each inclined rotation plate 13, the reason for which will be described later.

(Plate 11)
As shown in FIGS. 1 and 3, a plurality of plates 11 (hereinafter referred to as a left contact plate) are provided between the pair of inclined rotary plates 13, 13. The plurality of left contact plates 11 are long plate-shaped members, and both ends thereof are arranged in the plurality of notches 13g of the pair of inclined rotation plates 13, 13, respectively. The left contact plate 11 (the right contact plate 12 of the widening roll 10B) has a height longer than the depth of the notch 13h, and its upper end surface protrudes from the outer peripheral edge of the inclined rotation plate 13. It is provided so that. This is because when the rotating roll 10 is brought into contact with the web W, only the outer end surface of the left contact plate 11 (the right contact plate 12 in the widening roll 10B) comes into contact with the surface of the web W (FIG. 2).

As shown in FIGS. 3 and 4, the left contact plate 11 has two notches 11h. These two notches 11h are provided at positions corresponding to the grooves 13g of the pair of inclined rotary plates 13, 13 when the left contact plate 11 is arranged between the pair of inclined rotary plates 13, 13. There is. Specifically, the two notches 11h are formed such that the distance between them is the same as the distance between the pair of inclined rotary plates 13, 13. Therefore, if the left contact plate 11 is disposed between the pair of inclined rotary plates 13 and 13, the two notches 11h and the grooves 13g of the pair of inclined rotary plates 13 and 13 are overlapped with each other. It is possible (see the circle in FIG. 3).

Then, as shown in FIGS. 3 and 4, an O-ring R (or a string or the like) is arranged in the groove 13g of the pair of inclined rotary plates 13, 13. The O-ring R is provided to fix the plurality of left contact plates 11 in the plurality of notches 13h of the pair of tilt rotation plates 13, 13. Specifically, the plurality of left contact plates 11 are arranged in the plurality of notches 13h of the pair of inclined rotation plates 13, 13, and the two notches 11h and the grooves 13g of the pair of inclined rotation plates 13, 13 are arranged. The O-rings R are respectively arranged in the grooves 13g of the pair of inclined rotary plates 13 and 13 in the state where they are overlapped with each other. That is, the O-ring R is housed in the groove 13g and is also arranged so as to be located in the notches 11h of the plurality of left contact plates 11. Then, the plurality of left contact plates 11 are fixed by the O-ring R in a state of being pressed against the notches 13h of the pair of inclined rotary plates 13, 13. Therefore, even if the rotary roll 10 rotates, it is possible to prevent the plurality of left contact plates 11 from popping out from the notches 13h of the pair of inclined rotary plates 13, 13 due to the centrifugal force.

The pair of inclined rotary plates 13 and 13 and the O-ring R described above correspond to a holding member in the claims.

Further, as shown in FIG. 10, the groove 13g of the inclined rotary plate 13 (the groove 14g of the inclined rotary plate 14) may be provided at the position as described above, or may be formed on the surface of each inclined rotary plate 13. Good. Specifically, in the state in which the tilt rotation plate 13 (the tilt rotation plate 14) is attached to the support shaft 3, the surface arranged on the side opposite to the central portion of the rotation roll 10 (the tilt rotation plate 13 in FIG. For example, the groove 13g (groove 14g) may be formed on the left side or the right side of the inclined rotary plate 14) so as to form a circle centered on the rotation axis O of the inclined rotary plate 13 (inclined rotary plate 14). .. If the groove 13g (groove 14g) is formed at such a position, even if a centrifugal force is applied to the O-ring R, it is possible to prevent the O-ring R from being deformed and coming off the groove 13g (groove 14g).
Particularly, in order to prevent the O-ring R from coming off from the groove 13g (groove 14g), it is preferable to provide the plate 13p (plate 14p) on the surface of the inclined rotary plate 13 (inclined rotary plate 14). That is, it is preferable to provide the plate 13p (plate 14p) arranged so as to close the opening of the groove 13g (groove 14g) with the O-ring R housed in the groove 13g (groove 14g).

Further, a method of fixing the plurality of left contact plates 11 in the plurality of notches 13h of the pair of tilt rotation plates 13, 13, that is, the holding member is the pair of tilt rotation plates 13 and 13 and the O-ring R described above. It is not limited to the combination of.

For example, a string or the like can be passed through the notch 11h, and the left contact plate 11 can be fixed to the tilt rotation plate 13 by this string or the like. In this case, the pair of inclined rotary plates 13 and 13 and the cord or the like correspond to the holding member in the claims.

Further, a through hole may be formed in the inclined rotary plate 13 instead of the notch 13h, and a protrusion may be provided at the end of the left contact plate 11. In this case, if the protrusion at the end of the left contact plate 11 is inserted into the through hole of the inclined rotating plate 13, when the rotating roll 10 rotates, the centrifugal force causes the plurality of left contact plates 11 to move. It is possible to prevent the inclined rotation plates 13 and 13 from coming off. In this case, the pair of inclined rotary plates 13, 13 and the protrusion at the end of the left contact plate 11 correspond to the holding member in the claims.

(Other shapes of contact plates 11 and 12)
In the above example, the case where the contact plates 11 and 12 are long plate-shaped members has been described. Specifically, the case where the long sides of the plate-shaped contact plates 11 and 12 contact the web W has been described. However, the contact plates 11 and 12 are not necessarily limited to plate-shaped members, and simple rod-shaped members can also be used. However, if plate-like members are used as the contact plates 11 and 12 and the contact plates 11 and 12 are arranged so that their surfaces are substantially parallel to the radial direction of the support shaft 3 as in the above example, the rotary roll 10 is The durability against centrifugal force when rotated can be increased.

Further, as shown in FIGS. 7, 8 and 9A and 9B, the contact plates 11 and 12 may be formed in a substantially T-shaped cross section. That is, as the contact plates 11 and 12, those having plate-shaped contact portions 11t and 12t having a flat surface on the upper surface and plate-shaped base portions 11b and 12b orthogonal to the contact portions 11t and 12t are used. May be. If such contact plates 11 and 12 are used, the durability of the contact plates 11 and 12 against the centrifugal force when the rotating roll 10 rotates can be further increased.
Moreover, since the width of the contact portions 11t and 12t is longer than the width (that is, thickness) of the base portions 11b and 12b, the contact area between the web W and the contact plates 11 and 12 can be increased. Then, the friction between the one contact plate 11, 12 and the web W can be increased, so that the tension applied to the web W from the one contact plate 11, 12 can be increased.
Since the contact area between one contact plate 11 and 12 and the web W can be increased, the number of contact plates 11 and 12 to be provided can be reduced. Then, since the mechanical loss when the rotary roll 10 rotates can be reduced, the rotary roll 10 can be made to follow the running smoothly even if the web W runs at high speed. Therefore, even if the wrinkle straightening device 1 of the present embodiment is applied to the web W traveling at a high speed, it does not become a resistance against the traveling of the web W.

(Adjustment of tension applied to web W)
The tension applied to the web W may be appropriately adjusted depending on the properties of the web W, the traveling speed, and the like. In the case where the pair of widening rolls 10A and 10B of the rotating roll 10 described above are provided with the inclined rotation plates 13 and 14, if the inclination angle of the inclined rotation plates 13 and 14 with respect to the support shaft 3 is adjusted, it is added to the web W. The tension can be adjusted. For example, if the inclination angle is increased (from the state orthogonal to the support shaft 3 toward the support shaft 3), the force for stretching the web W in the width direction can be increased. On the contrary, if the inclination angle is made small (so that the inclined rotation plates 13 and 14 come close to the state orthogonal to the support shaft 3), the tension applied to the web W can be made small.

(Oscillation)
With the above structure, tension can be applied to the web W in the width direction. On the other hand, in the width direction of the web W, the tension in the traveling direction of the web W may be different. In this case, the web W is pulled in the direction of high tension and meanders.

When the web W meanders, the center line CL of the web W and the symmetry plane SP may be displaced. When the center line CL of the web W and the plane of symmetry SP deviate, the tension applied in the width direction of the web W becomes non-uniform, and the web W may be pulled in the direction in which the tension is strong.

Therefore, it is desirable that the rotating roll 10 is provided with a swinging unit that holds the rotating roll 10 swingably in the axial direction thereof.

For example, when the base frame 2 is provided, the swing means 8 is connected to the base frame 2 so that the swing shaft is located on the plane of symmetry SP. Then, the swinging means 8 is fixed to the frame of the facility or the like via the bracket BL or the like.

With this configuration, the rotating roll 10 can swing in the width direction of the web W (that is, the axial direction of the rotating roll 10). Then, it is possible to prevent the center line CL of the web W from deviating from the symmetry plane SP due to the rotation roll 10 swinging in the direction of the high tension in the web W. Then, since the tension applied from the rotating roll 10 in the width direction of the web W can be maintained evenly across the center line CL of the web W, it is possible to extend the wrinkles S while preventing problems due to meandering of the web W.

In particular, as shown in FIGS. 1 and 2, the swing shaft 8a of the swing means 8 is connected to the base frame 2 via the plate 8p or the like, and the contact position between the web W and the rotary roll 10 and the rotation of the rotary roll 10 are rotated. It is desirable that the swing shaft 8a be provided in an offset state with respect to the plane TS including the axis. With such a configuration, the caster effect can be enhanced, so that the web W can be easily run stably.

(Structure with center plate)
As shown in FIG. 1 and FIG. 3, if the pair of widening rolls 10A and 10B has the pair of inclined rotary plates 13 and 13 and the pair of inclined rotary plates 14 and 14, the left contact plate 11 and the right contact plate. It is preferable in that 12 can be stably held. That is, both ends of the left contact plate 11 and the right contact plate 12 are held by the pair of tilt rotation plates 13 and 13 and the pair of tilt rotation plates 14 and 14, respectively. Then, even when the rotating roll 10 rotates at high speed (that is, when the web W travels at high speed), the left contact plate 11 and the right contact plate 12 are stably maintained at a predetermined distance with respect to the central axis 13. be able to. Therefore, the wrinkles S of the web W can be stably extended even when the web W is traveling at a high speed.

On the other hand, one of the pair of inclined rotary plates 13 and 13 is replaced by the inclined rotary plate 13 located on the central side and the pair of inclined rotary plates 14 and 14 is located on the central side of the inclined rotary plate 14. The central plate 15 may be provided. That is, the central end portions of the left contact plate 11 and the right contact plate 12 may be held by the single central plate 15. In this case, each of the pair of widening rolls 10A and 10B need only be provided with the inclined rotary plate 13 and the inclined rotary plate 14 that hold the outer ends of the contact plates 11 and 12. Then, the number of plates connected to the support shaft 3 can be reduced, so that the structure of the rotating roll 10 can be simplified and the mechanical loss can be reduced.

When the center plate 15 is adopted, the center plate 15 is the left contact plate 11 in order to secure the movement of the contact plates 11 and 12 (the movement of the web W in the width direction) accompanying the rotation of the rotary roll 10. And the center end of the right contact plate 12 is held so as to be movable along its axial direction. The method of holding in this way is not particularly limited.
For example, the following structure can be adopted.

As shown in FIGS. 7 and 9, a through hole 15h is formed in the center plate 15, and notches 11s and 12s are provided at the ends of the contact plates 11 and 12 on the center side. Further, the through hole 15h is formed so that the opening area is slightly larger than the cross section of the protrusion (the lower protrusion in FIGS. 7 and 9) sandwiching the notches 11s and 12s. Then, the contact plates 11 and 12 are attached such that the lower projections thereof are inserted into the through holes 15h of the central plate 15. Then, the contact plates 11 and 12 can move along the axial direction (the left-right direction in FIG. 7, the axial direction of the support shaft 3) while the protrusion is inserted into the through hole 15h. That is, it is possible to change the amount of insertion of the protrusion of each contact plate 11, 12 into the through hole 15h. In other words, it is possible to change the amount of overlap between the central end portions of the contact plates 11 and 12.
Further, with the above structure, when the rotating roll 10 rotates, even if a centrifugal force is applied to each of the contact plates 11 and 12, the protrusion is caught in the through hole 15h. Then, even if the centrifugal force applied to each contact plate 11 and 12 becomes large, each contact plate 11 and 12 does not move outward.
Therefore, with the structure shown in FIGS. 7 and 9, even when the rotary roll 10 rotates at a high speed, the contact plates 11 and 12 are secured to move in the axial direction while contacting each contact plate from the central plate 15. It is possible to more reliably prevent the plates 11 and 12 from coming off.

In the case of the above structure, the cutouts 11s and 12s are brought into contact with each other so that when the lower protrusion is inserted into the through hole 15h, the upper protrusion is arranged outward of the outer edge of the central plate 15. It is desirable to form the plates 11 and 12. However, it goes without saying that a protrusion to be inserted into the through hole 15h may simply be provided at the end portion on the center side of each of the contact plates 11 and 12.

(Structures of inclined rotary plates 13 and 14 and central plate 15)
As shown in FIG. 4, the inclined rotary plates 13 and 14 may be formed as an integral structure, or the boss portions 13b and 14b that hold the bearings and the donut plate-shaped plate that holds the contact plates 11 and 12. The parts 13a and 14a may be formed separately and may be formed by combining both (see FIGS. 7 and 8). If the plate portions 13a and 14a and the boss portions 13b and 14b are separately formed, the shapes of both can be increased in flexibility. Also, both can be formed of different materials. For example, the boss portions 13b and 14b can be made of metal, and the plate portions 13a and 14a can be made of resin or the like. Further, even when the specifications of the web W are changed, it is possible to meet various specifications simply by changing the plate portions 13a and 14a.
In FIGS. 7 and 8, the plate portions 13a and 14a have grooves 13g and 14g formed on the surfaces of the plate portions 13a and 14a. However, the grooves 13g and 14g may be formed along the circumferential direction of the outer peripheral edges of the plate portions 13a and 14a (see FIGS. 3 and 4).
Further, as shown in FIGS. 7 and 8, when the grooves 13g and 14g are formed on the surfaces of the plate portions 13a and 14a, the plate 13p (the plate 13p, which is arranged so as to close the opening of the groove 13g (the groove 14g)). 14p) is preferably provided (see FIG. 10).

(Wrinkle straightening device 50 of another embodiment)
The wrinkle straightening device of the present invention can employ the following configurations. Below, the wrinkle straightening device 50 of other embodiment is demonstrated.
In the above description, the description of the configuration common to the wrinkle straightening device 1 will be omitted as appropriate.

As shown in FIG. 11, the wrinkle straightening device 50 also includes a base frame 52 having the same configuration as the wrinkle straightening device 1. A support shaft 53 is provided between the pair of holding plates 52a and 52b of the base frame 52 (see FIG. 13). The support shaft 53 connects the rotating roll 60 to the base frame 52 so as to be rotatable. Similar to the above-described rotating roll 10, the rotating roll 60 includes a pair of widening rolls 60A and 60B in which a contact member is provided between the inclined rotating plates 63 and 64. Details of the rotating roll 60 will be described later.

(Support shaft 53)
As shown in FIGS. 13 to 15, the support shaft 53 is composed of a plurality of members. Specifically, the pair of shaft members 54a and 54b, the connecting member 55 that connects the pair of shaft members 54a and 54b, and the pair of shaft members 54a and 54b and the pair of holding plates 52a and 52b are connected to each other. And a pair of end members 56a and 56b.

The pair of shaft members 54a and 54b are shaft-shaped members, and are connected by a connecting member 55 so that their central axes are coaxially located.

The pair of end members 56a, 56b are provided such that their central axes are inclined with respect to the rotation axes of the pair of widening rolls 60A, 60B. Specifically, the end member 56a is provided so that the central axis thereof is coaxial with the rotation axis of the inclined rotation plate 63 of the widening roll 60A. On the other hand, the end member 56b is provided such that its center axis is coaxial with the rotation axis of the inclined rotation plate 64 of the widening roll 60B.

The connecting member 55 is a member that connects the inner edges of the pair of shaft members 54a and 54b. The connecting member 55 is composed of a pair of connecting shafts 55a and 55b connected to the pair of shaft members 54a and 54b, and a connecting plate 55c connecting the pair of connecting shafts 55a and 55b. The pair of connecting shafts 55a and 55b are portions to which the inclined rotation plates 63 and 64 of the pair of widening rolls 60A and 60B are attached. The angle formed between the pair of connecting shafts 55a and 55b with respect to the pair of shaft members 54a and 54b is the same as the angle formed between the rotating shafts of the pair of widening rolls 60A and 60B and the rotating shafts of the inclined rotating plates 63 and 64. It is provided so as to form an angle. Specifically, the connecting shaft 55a is provided so as to be coaxial with the rotation shaft of the inclined rotation plate 63 of the widening roll 60A. On the other hand, the connecting shaft 55b is provided so as to be coaxial with the rotating shaft of the inclined rotating plate 64 of the widening roll 60B.

(Rotating roll 60)
As shown in FIGS. 11 and 12, the rotary roll 60 includes a pair of widening rolls 60</b>A and 60</b>B as in the wrinkle straightening device 1. The pair of widening rolls 60A and 60B may have the same structure as the pair of widening rolls 10A and 10B of the wrinkle straightening device 1 described above. In this case, with respect to the inclined rotary plates 13 and 14 of the wrinkle straightening device 1, the rotary shaft thereof and the support shaft 53 (that is, the central axes of the pair of connecting shafts 55a and 55b and the pair of end members 56a and 56b) are coaxial. It is arranged as follows. Then, it can be made to function like the wrinkle straightening device 1.

On the other hand, if the shaft-shaped members 61 and 62 having a circular cross section are used as the contact members for the pair of widening rolls 60A and 60B, the web W and the shaft-shaped members 61 and 62 can be easily brought into contact with each other on the surface. Then, there is an advantage that the friction generated between the web W and the shaft-shaped members 61 and 62 can be reduced.

Specifically, as shown in FIGS. 11 to 13, the pair of widening rolls 60A and 60B have substantially the same structure, and the central axis of the pair of shaft members 54a and 54b is the support shaft 53. And are coaxial with each other. The pair of widening rolls 60A and 60B are provided such that the side peripheral surfaces thereof are parallel to the pair of shaft members 54a and 54b of the support shaft 53, similarly to the pair of widening rolls 10A and 10B.

Further, in the pair of widening rolls 60A and 60B, similarly to the pair of widening rolls 10A and 10B, the end portions of the central portions of the shaft-shaped members 61 and 62 overlap each other, and moreover, in the axial direction of the support shaft 53 thereof. It is arranged so that no gap is formed between the side peripheral surfaces (see FIGS. 11 to 13). Moreover, the pair of widening rolls 60A and 60B also have a symmetric surface (a surface that bisects the support shaft 53) orthogonal to the pair of shaft members 54a and 54b of the support shaft 53, similarly to the pair of widening rolls 10A and 10B. They are arranged so as to be substantially plane-symmetrical with respect to each other.

With the above-described configuration, the pair of widening rolls 60A and 60B also have the ends of the central portions of the shaft-shaped members 61 and 62 in the rotation direction of the rotating roll 60, similarly to the pair of widening rolls 10A and 10B. They are arranged so as to overlap each other. Moreover, the overlapping length L sequentially changes along the circumferential direction from the portion having the largest overlap (the portion having the overlapping length L2) to the portion having the smallest overlap (the portion having the overlapping length L1). (See FIGS. 3 and 13).

Therefore, if the web W is wound around the rotary roll 60, the rotary roll 10 rotates as the web W travels, and the web W moves outward in the width direction with the rotation, as with the rotary roll 10. Tension can be applied. The tension allows the wrinkles S formed along the transport direction of the web W to be stretched.

Although the structure of the pair of widening rolls 60A and 60B will be described below, the pair of widening rolls 60A and 60B have substantially the same structure except that they are plane-symmetric with respect to the plane of symmetry. In the following, the widening roll 60A will be described as a representative.

(Tilt rotation plate 63)
As shown in FIG. 13, the widening roll 60A includes a pair of inclined rotation plates 63, 63, which are disk-shaped members attached to the support shaft 53. Specifically, the outer inclined rotation plate 63 is rotatably connected to the end member 56a of the support shaft 53 via a bearing or the like. On the other hand, the inner inclined rotation plate 63 is rotatably connected to the connection shaft 55b of the connection member 55 of the support shaft 53 via a bearing or the like. Therefore, since the pair of inclined rotation plates 63, 63 are arranged so as to be parallel to each other, the same inclination is always obtained with respect to the pair of shaft members 54a, 54b of the support shaft 53 when viewed from a certain direction. It is possible to rotate while maintaining the angle.

(Tilt rotation plate 63)
A plurality of shaft end connecting members 65 are provided on the outer peripheral edge of the inclined rotating plate 63 so as to be rotated about the rotating shaft. The shaft-shaped member 61 is connected to the outer peripheral edge of the inclined rotation plate 63 by the plurality of shaft-end connecting members 65. Specifically, the shaft-shaped member 61 is inclined and rotated by the shaft-end connecting member 65 so as to be parallel to the central axes of the pair of shaft members 54a and 54b of the support shaft 53 (in other words, the rotation shaft of the widening roll 60A). It is connected to the plate 63. In other words, the shaft-shaped member 61 is connected to the tilt rotation plate 63 by the shaft end connection member 65 so that the central axis of the shaft-shaped member 61 is tilted with respect to the rotation axis of the tilt rotation plate 63.

The shaft end connecting member 65 includes a base end portion 65a and a tip end portion 65b.

The base end portion 65a is a shaft-shaped portion, and the base end thereof is rotatably connected to the outer end edge of the inclined rotation plate 63 by a bearing or the like. The base end portion 65a is arranged such that its central axis (rotational axis) is parallel to the rotation axis of the inclined rotation plate 63.

The tip portion 65b is a shaft-shaped member whose base end portion is linked to the tip of the base end portion 65a. The tip end of the tip end portion 65b is provided such that its center axis is parallel to the center axis of the pair of shaft members 54a and 54b (in other words, the rotation axis of the widening roll 60A). The tip of the tip portion 65b is connected to the end edge of the shaft-shaped member 61 such that the center axis thereof is coaxial with the center axis of the shaft-shaped member 61.

Since the shaft-end connecting member 65 has the structure as described above, if the shaft-shaped member 61 is connected to the inclined rotation plate 63 by the plurality of shaft-end connecting members 65, the plurality of shaft-shaped members 61 can be connected to the pair of support shafts 53. It can be arranged so as to be parallel to the central axes of the shaft members 54a and 54b (in other words, the rotation axis of the widening roll 60A).

The method for connecting the tip end portion 65b of the shaft end connecting member 65 and the shaft-shaped member 61 is not particularly limited. For example, the tip portion 65b and the end edge of the shaft-shaped member 61 may be fixed with screws or the like, or may be connected with an adhesive or the like. In addition, a recessed portion that is recessed from the edge may be provided on the edge of the shaft-shaped member 61. In this case, if the tip end portion 65b of the shaft end connecting member 65 is inserted into the recessed portion so as to connect the tip end portion 65b of the shaft end connecting member 65 and the shaft-shaped member 61, the connection of the both can be facilitated. Therefore, there is an advantage that the device is easily assembled. In particular, if the shaft-shaped member 61 is hollow tubular (pipe-shaped), it has an opening at its end edge. Then, by inserting the tip end portion 65b into the opening of the end edge of the shaft-shaped member 61, the tip end portion 65b of the shaft-end connecting member 65 and the shaft-like member 61 can be connected (see FIG. 14B). Moreover, there is an advantage that the center axis of the shaft-shaped member 61 and the center axis of the tip end portion 65b of the shaft end connecting member 65 can be easily aligned with each other.

(About rotating roll 60)
The structure of the rotating roll 60 described above (that is, the structure using the shaft-shaped members 61 and 62 as the contact members) can be adopted in the wrinkle straightening device 1 of FIG. On the contrary, the structure of the rotating roll 10 of the wrinkle straightening device 1 of FIG. 1 described above (that is, the structure in which the plate-shaped plates 11 and 12 are the contact members) can be adopted in the wrinkle straightening device 50 of FIG. 11.

(About support shaft 53)
As shown in FIG. 16, the connecting member 55 of the support shaft 53 may be provided with the connecting plate 55c and the pair of connecting shafts 55a and 55b in a separable manner, or may be integrally formed. When provided in a separable manner, as shown in FIG. 16, groove portions are provided at both end edges of the pair of connecting shafts 55a and 55b so that the inner ends of the connecting plate 55c and the pair of shaft members 54a and 54b. The edge may be engaged with the groove. Then, the support shaft 53 can be easily and accurately assembled.

Further, the structure of the support shaft 53 (the connecting structure of the support shaft 53 and the inclined rotary plates 63, 64) described above can be adopted in the wrinkle straightening device 1 of FIG. On the contrary, the structure of the support shaft 3 of the wrinkle straightening device 1 of FIG. 1 (the connecting structure of the support shaft 3 and the inclined rotary plates 13 and 14) may be adopted in the wrinkle flattening device 50 of the figure.

Further, the wrinkle stretching device of the present invention is suitable as a device for stretching the wrinkles of a web such as a nonwoven fabric or a film in a production line of a paper diaper or the like.

1 Wrinkle straightening device 2 Base frame 3 Support shaft 8 Swinging means 10 Rotating roll 10A Widening roll 10B Widening roll 11 Left contact plate 12 Right contact plate 13 Left tilting rotary plate 14 Right tilting rotary plate 15 Center plate 15h Through hole 50 Wrinkle straightening Device 52 Base frame 53 Support shaft 54a Shaft member 54b Shaft member 55 Connection member 55a Connection shaft 55b Connection shaft 55c Connection plate 56a End member 56b End member 60A Widening roll 60B Widening roll 61 Shaft member 62 Shaft member 63 Tilt rotation Plate 64 Inclined rotation plate 65 Shaft end connection member 65a Base end part 65b Tip part B Bearing R O ring S Wrinkle SP Symmetrical surface W Web IS Virtual cylindrical surface CL Center line

Claims (9)

A device for unfolding wrinkles of a web that is continuously conveyed,
Support shaft,
A rotary roll rotatably provided around the support shaft,
The rotating roll is
Equipped with a pair of widening rolls,
Each widening roll is
A plurality of contact members arranged so as to form an inclined cylindrical roll that is rotationally symmetric with respect to the support shaft and is coaxial with the support shaft,
A holding member for holding a distance between the contact member and the support shaft at a predetermined distance,
The holding member of the widening roll is
A rotating plate rotatably provided with respect to the support shaft, the outer peripheral edge of which is connected to the central end of the plurality of contact members;
An outer peripheral side of the plurality of contact members is provided on the outer peripheral edge, which is rotatably provided with respect to the support shaft, and is provided so that the rotation shaft has a predetermined inclination angle with respect to the support shaft. And an inclined rotation plate whose end portions are connected to each other,
The pair of widening rolls,
It is substantially plane-symmetric with respect to a plane of symmetry orthogonal to the support axis, and the ends of the central portions of the plurality of contact members of each widening roll are arranged so as to overlap each other in the rotation direction of the rotating roll. And a wrinkle straightening device, which is provided so that there is no gap between the side peripheral surfaces of the contact members that are adjacent to each other in the axial direction of the support shaft and that contact the web. The rotating plate of the holding member,
An inclined rotary plate provided in parallel with the inclined rotary plate,
The plurality of contact members,
The O-rings are fixed to the outer peripheral edge of the inclined rotary plate to which the outer ends of the plurality of contact members are connected and the outer peripheral edge of the inclined rotary plate that is the rotary plate of the holding member. The wrinkle straightening device according to claim 1. The rotating plate of the holding member,
At the central portion in the axial direction of the rotating roll, a central plate orthogonal to the support shaft and rotatably provided with respect to the support shaft,
A plurality of contact members in the pair of widening rolls,
The wrinkle according to claim 1, wherein an end portion of the rotating roll located on the central side in the axial direction is held by the central plate so as to be movable along the axial direction of the support shaft. Stretching device. A plurality of contact members of each widening roll,
Providing a protrusion on the central portion side in the axial direction of the rotating roll,
The wrinkle straightening device according to claim 3, wherein the center plate is provided with a plurality of through holes into which the protrusions of the contact members are inserted. The plurality of contact members,
The wrinkle straightening device according to claim 1, 2, 3, or 4, characterized in that it is provided with a contact portion that is formed on a side opposite to the support shaft and is substantially flat. The rotating plate of the holding member,
An inclined rotary plate provided in parallel with the inclined rotary plate,
The plurality of contact members is formed by a shaft-shaped member having a circular cross section,
The edge of the contact member is
An outer peripheral edge of the inclined rotary plate to which the outer end of the contact member is connected by the shaft end connecting member, and an outer peripheral edge of the inclined rotary plate that is the rotary plate of the holding member,
The shaft end connecting member is
A base end portion that is rotatably connected to the outer peripheral edge of the inclined rotation plate and is arranged such that its rotation axis is parallel to the rotation axis of the inclined rotation plate;
The wrinkle straightening device according to claim 1, further comprising: a tip end portion that holds the central axis of the contact member so as to be parallel to the rotation axis of the rotary roll. The plurality of contact members,
At both ends, it has a recessed portion that is recessed from both ends,
The tip of the shaft end connecting member is
Equipped with an insertion shaft to be inserted into the recessed portion,
The insertion axis is
7. The wrinkle straightening device according to claim 6, wherein the central axis is provided so as to be parallel to the central axis of rotation of the rotary roll. The support shaft is
The inclined rotation plate has a plurality of inclined portions rotatably attached,
The inclined portion is
The wrinkle straightening device according to any one of claims 2 to 7, wherein the central axis is inclined with respect to the central axis of rotation of the rotating roll. The wrinkle straightening device according to any one of claims 1 to 8, further comprising a swinging unit that holds the rotating roll so as to swing in the axial direction of the rotating roll.

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