JP2005212149A - Processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing apparatus capable of enhancing the on-off operation precision of a shaking arm. <P>SOLUTION: The processing apparatus 20 is equipped with a rotary member 40 for holding a cylindrical part 50 to unidirectionally rotate around the center axis thereof, the shaking arms 63 supported on the rotary member in a freely shakable manner so as to be opened and closed with respect to the outer peripheral surface of the cylindrical part and a cam mechanism for converting the rotation of the rotary member to shaking to transmit the same to the shaking arms. During period when the continuous work 1a wound around the cylindrical part over a predetermined range in the rotary direction thereof is passed through the predetermined range by the rotation of the cylindrical part, the part of the work wound around the cylindrical part is held and released by the on-off operation of the shaking arms corresponding to the part of the wound work to form a part to be processed. The cam mechanism is equipped with a first cam 81 for magnifying the rotation over the predetermined angle of the rotary member to the rotation of a first cam follower node 84 corresponding to an angle larger than the predetermined angle and a second cam 75 for converting the magnified rotation of the first cam follower node to the shaking of a second cam follower node 76. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a processing apparatus used for production of products such as disposable diapers, and relates to a processing apparatus for forming a part to be processed at a predetermined formation pitch on a continuous work before being divided into product units.

  Conventionally, a continuous production line for disposable diapers or the like has been provided with a sealing device for forming a welded portion on a continuous base material (corresponding to “continuous workpiece” according to the claims) before being divided into product units. ing. And using this, the welding part (henceforth a seal part) is formed in the said continuous base material with the predetermined formation pitch, for example, the pitch equivalent to a product unit.

  1A and 1B are conceptual diagrams of this sealing device. FIG. 1A is a front view, and FIG. 1B is a central sectional view showing a part in a side view. In addition, hatching is written in the cross-sectional part over all the drawings used below.

  The sealing device 120 includes a turntable 140 that is supported by a support base 130 and rotates around a rotation center 141. On the rotating disk 140, a drum 150 is integrally provided concentrically with the rotation center 141, and a sandwiching arm 160 is integrally provided in the vicinity of the drum 150 in the rotating disk 140, and these are rotated. The disk 140 rotates together around the rotation center 141. Then, the base material 1 a continuously conveyed from the previous step is wound around a predetermined range on the outer peripheral surface of the drum 150, and the portion of the base material 1 a that is wound is wound on the predetermined surface by the drum 150. While passing through the range, the sandwiching arm 160 facing the portion of the base material 1a sandwiches this, and an ultrasonic wave or the like is applied to the sandwiched portion to form a seal portion (see Patent Document 1).

  For example, six sandwiching arms 160 are provided at equal intervals along the circumferential direction of the drum 150, and the portion of the base material 1a facing each sandwiching arm 160 is transported through the predetermined range. Each sandwiching arm 160 sequentially forms a seal portion during the operation. As a result, six seal portions can be formed each time the drum 150 rotates once together with the turntable 140.

  Here, the clamping operation of the clamping arm 160 will be described in detail with reference to FIGS. 1C to 1E. FIG. 1C is a central cross-sectional view of a sealing device partially shown in a side view, and FIGS. 1D and 1E are front views of a groove cam according to a driving mechanism of a clamping arm.

  As shown in FIG. 1C, each clamping arm 160 includes a fixed arm 164 fixed to the rotating disk 140 and a swinging arm 163 pivotally supported on the rotating disk 140. . The holding surface 163a opens and closes with respect to the holding surface 164b of the fixed arm 164 by the swing of the swing arm 163, thereby holding the base material 1a. The swing arm 163 shown in the upper side of FIG. 1C is in a fully closed state, and the swing arm 163 shown in the lower side is in a fully open state.

  The drive mechanism that drives the swing arm 163 is a so-called cam mechanism that converts the rotation of the rotating disk 140 as a power source into swing. The cam mechanism includes a groove cam 180 fixed to the support base 130 in a face-to-face state with the rotating disk 140, and a cam follower 181 that is provided for each of the swing arms 163 and rolls on a groove 182 of the groove cam 180. It consists of.

  The groove 182 is an annular path formed around the rotation center 141 as shown in a front view in FIG. 1D, and the orbiting radius R varies depending on the position in the circumferential direction. As the rotating disk 140 rotates, the radial position of the groove 182 in which the cam follower 181 rolls changes, so that the swing arm 163 of the cam follower 181 swings.

  Specifically, the groove 182 includes a small radius section where the radius R is set to a small value R1, a large radius section where the radius R is a large value R2, and two transition sections connecting these sections. It is divided. When the cam follower 181 of the swing arm 163 passes through the small radius section due to the rotation of the rotating disk 140, the cam follower 81 is positioned on the radial rotation center 141 side, so that the swing arm 163 is fully opened. Become. On the other hand, when passing through the large radius section, the cam follower 181 is located outward in the radial direction, and thus is fully closed. Further, when passing through two transition sections, either an opening operation that opens in the opening direction or a closing operation that closes in the closing direction is performed.

  By the way, in order to improve the production speed of such a processing apparatus 120, the rotational speed of the rotating disk 140 is increased, and accordingly, the operation accuracy of the opening / closing operation of the swing arm 163 needs to be improved. Comes out. This is because the opening / closing operation of the swing arm 163 is created from the rotation of the turntable 140. That is, as the rotational speed of the turntable 140 increases, the opening / closing speed of the swing arm 163 is also increased in conjunction with this. However, as the opening / closing speed increases, the influence of the inertial force increases. This is because the error in the position of the moving arm 163 increases. For example, if the speed of the closing operation is fast, a large inertial force acts on the swing arm, and when it is fully closed by the amount of the inertial force, there is a possibility that the substrate 1a may be excessively closed and the substrate 1a is broken. In order to prevent this, it is necessary to improve the opening / closing operation accuracy of the swing arm 163.

As a method for improving the opening / closing operation accuracy, an angle range to be allocated to the transition section can be increased. For example, a small radius section shown in FIG. 1D is also allocated to the transition section, as shown in FIG. 1E. It is conceivable to increase the transition interval.
JP 2002-355270 A (pages 9 to 11 and FIGS. 1 to 7)

However, even the large radius section that creates the fully closed state necessary for the welding process cannot be assigned to the transition section, and it is impossible to expand the range of angles beyond this. This hinders further improvement in the opening / closing accuracy of the swing arm 163.
Further, in the line where the sealing device 120 is disposed, since the base material 1a of the paper diaper is handled, dust such as fibers of the base material 1a may be scattered in the surrounding space. In the sealing device 120 described above, as shown in FIG. 1C, the groove 182 as the cam surface and the cam follower 181 as the rolling roller are exposed in the surrounding space. Is likely to adhere, and if it adheres, the opening / closing operation accuracy of the swing arm 163 may deteriorate.

  The present invention has been made in view of such a conventional problem, and a swing arm for forming a work piece across a continuous workpiece wound around a cylindrical portion of a rotating rotating member, and the swing arm And a cam mechanism that swings and opens and closes, and the cam mechanism improves the opening / closing operation accuracy of the swing arm with respect to the processing device that converts the rotation of the rotating member into swing and transmits the swing to the swing arm. It is an object of the present invention to provide a processing apparatus that can do this.

  In order to achieve this object, the invention according to claim 1 is capable of opening and closing with respect to a rotating member that holds the cylindrical portion and rotates in one direction around the central axis of the cylindrical portion, and an outer peripheral surface of the cylindrical portion. And a cam mechanism that converts the rotation of the rotating member into a swing and transmits the swing to the swing arm, and the rotation of the cylinder portion While the continuous workpiece wound over a predetermined range of directions passes through the predetermined range by the rotation of the cylindrical portion, the portion is formed by closing and opening the swing arm corresponding to the portion of the wound workpiece. In the processing apparatus that forms the processing portion by releasing the pin, the cam mechanism expands the rotation of the rotating member by a predetermined angle to the rotation of the first cam follower by an angle larger than the predetermined angle. First cam and the enlarged first cam The rotation of Dobushi, characterized in that a second cam for converting the swinging of the second cam follower.

According to the invention, the rotation of the rotating member by a predetermined angle is expanded by the first cam to the rotation of the first cam driven node by an angle larger than the predetermined angle, and the expanded first cam driven node. This rotation is converted into oscillation of the second cam follower by the second cam.
Therefore, the swing performed based on the rotation of the rotating member by a predetermined angle can be expressed by using the cam surface having an angle range larger than the predetermined angle in the second cam. It becomes possible to improve. The opening / closing operation accuracy of the swing arm can be improved by improving the swing operation accuracy.

According to a second aspect of the present invention, in the processing apparatus according to the first aspect, the first cam is configured to rotate the first cam with respect to the rotation of the predetermined angle out of one rotation of the rotating member. The rotation is converted into one rotation of the driven node, and the rotation of the rotation member other than the predetermined angle is not converted into the rotation of the first cam driven node. The cam converts rotation of one rotation of the first cam follower into one swing of the second cam follower.
According to the above invention, rotation of the predetermined angle out of one rotation of the rotating member is converted into one rotation of the first cam follower. Then, the swinging motion is expressed on the cam surface in the range of the angle expanded to one rotation, and the second cam follower swings once for the cam surface. Accordingly, it is possible to improve the operation accuracy of the swing operation of the second cam follower.

According to a third aspect of the present invention, in the processing apparatus according to the second aspect, the rotating member is supported by a support base so as to be rotatable around a central axis of the cylindrical portion, and the first cam is A globoidal cam fixed to the support base concentrically with the central axis and having a cam surface on an outer peripheral surface, wherein the first cam follower is provided on the rotating member and rotates along with the rotation of the rotating member. A shaft body that rotates along a surface, and the rotating shaft body intermittently rotates around an axis center by engaging an engaging portion of the shaft body with the cam surface.
According to the invention, the shaft body of the first cam follower engages with the cam surface formed on the outer peripheral surface while rotating along the outer peripheral surface of the first cam along with the rotation of the rotating member. To rotate around the axis. Accordingly, the amount of rotation around the axis can be uniquely associated with the rotation position around the central axis where the shaft is located, and thus the coil is wound over a predetermined range in the rotation direction of the cylindrical portion. The opening / closing operation can be reliably performed on the workpiece portion.

  According to a fourth aspect of the present invention, in the machining apparatus according to the third aspect, the cam surface of the first cam is displaced in the direction of the central axis along the circumferential direction. The shaft body has a rotation section and a non-displaced stop section, and the shaft body is oriented in a direction perpendicular to the central axis, and the outer peripheral surface of the shaft body has a circumferential direction. A plurality of rolling rollers as the engaging portions are provided at appropriate intervals along the shaft, and when the shaft body is located in the rotation section, rolling that rolls on the cam surface. When the roller moves in the direction of the central axis and the rolling roller that sequentially rolls on the cam surface is replaced, the shaft rotates around the axis, and the shaft is positioned in the stationary section. The rolling roller that rolls on the cam surface does not move in the direction of the central axis. The shaft body by is characterized in that it does not rotate about the axis.

According to the above invention, when the shaft body is located in the rotation section, the shaft body rotates around the shaft center due to the engagement between the engagement portion and the cam surface, while the shaft section rotates in the stopping section. When positioned, the shaft does not rotate due to the engagement, so that the shaft rotates intermittently around its axis.
And here, a rolling roller is provided on the shaft body as an engaging portion for rotating the shaft body around the axis, and this rolling roller has a cam surface of the first cam. It comes to roll. Therefore, the contact resistance at the time of engagement with the cam surface can be reduced, and the rotational power of the rotating member serving as the power source for the rotation of the shaft body can be reduced.

According to a fifth aspect of the present invention, in the processing apparatus according to the fourth aspect, the first cam includes a rib on an outer peripheral surface, a pair of side surfaces of the rib function as the cam surface, The rolling roller that rolls is characterized in that the rib is sandwiched between adjacent rolling rollers that roll on the other side surface.
According to the invention, the rolling roller rolls on the side surface of the rib while sandwiching the rib of the first cam with the adjacent rolling roller. Accordingly, it is possible to effectively suppress backlash that is a gap between the side surface as the cam surface and the rolling roller, and to ensure that the first cam follower is in accordance with the rotational motion expressed on the cam surface of the first cam. Can be rotated. As a result, the conversion to intermittent rotation achieved by the first cam and the first cam follower can be executed with high accuracy.

According to a sixth aspect of the present invention, in the processing apparatus according to any one of the second to fifth aspects, the first cam is covered in a substantially sealed state by a case fixed to the rotating member. The shaft body that is rotatably supported by the case is accommodated in the interior of the casing, and one end portion of the shaft body that protrudes outward from the case is accommodated in a housing that accommodates the second cam. At the same time, the one end is concentrically connected to the second cam while restricting relative rotation of each other.
According to the above invention, the first cam is covered with the case, and a portion other than the one end of the shaft body of the first cam follower is housed in the case. Therefore, it is possible to effectively prevent foreign matter from adhering to the cam surface of the first cam and the engaging portion engaged therewith, and conversion to intermittent rotation achieved by the first cam and the first cam follower is achieved. It can be executed with high accuracy.
In addition, one end of the shaft projecting outward from the case is concentrically connected to the second cam while being restricted in relative rotation with the second cam in a state of being housed in the housing. Accordingly, it is possible to effectively prevent foreign matter from adhering to the connected portions, and the rotation of the first cam follower can be transmitted to the second cam with high accuracy.

A seventh aspect of the present invention is the processing apparatus according to the sixth aspect, wherein the housing is fixed to the rotating member, and the second cam and the second cam follower are substantially sealed inside. The second cam is a globoidal cam having a cam surface on an outer peripheral surface supported rotatably on the shaft around the housing, and the second cam follower is formed around the shaft center on the housing. A shaft body that is rotatably supported, and is a shaft body that swings around an axis center when the engaging portion engages with the cam surface, and one end of the shaft body that protrudes outward from the housing The swing arm is fixed to the portion.
According to the above invention, the portion other than the one end of the shaft body of the second cam follower and the second cam are accommodated in the housing. Therefore, it is possible to effectively prevent foreign matter from adhering to the cam surface of the second cam and the engaging portion engaged therewith, and the conversion to the swing achieved by the second cam and the second cam follower is achieved. It can be executed with high accuracy.

  The invention according to claim 8 is the processing apparatus according to claim 7, wherein the cam surface of the second cam is forward rotated such that the position of the cam surface is displaced in the axial direction along the circumferential direction. And a shaft portion of the second cam follower with its axis oriented in a direction perpendicular to the axis of the second cam. In addition, a plurality of rolling rollers as the engaging portions are provided along the circumferential direction on the outer peripheral surface of the shaft body, and the cam surface is rotated by the rotation of the second cam. The shaft body swings around the axis when the moving rolling roller moves in the axial direction of the second cam.

According to the above invention, when the rolling roller of the shaft body rolls in the forward rotation section of the cam surface by the rotation of the second cam, it rotates in the forward direction around the axis, while the reverse rotation section is When rolling, it rotates in the opposite direction around the axis, so that the shaft body swings around its axis.
And here, the shaft body is provided with a rolling roller as an engaging portion for rotating the shaft body around the axis, and this rolling roller has a cam surface of the second cam. It comes to roll. Therefore, the contact resistance at the time of engagement with the cam surface can be reduced, and the rotational power of the rotating member serving as the power source for the rotation of the shaft body can be reduced.

The invention according to claim 9 is the processing apparatus according to claim 8, wherein the second cam includes a rib on an outer peripheral surface, and a pair of side surfaces of the rib function as the cam surface, The rolling roller that rolls is characterized in that the rib is sandwiched between adjacent rolling rollers that roll on the other side surface.
According to the invention, the rolling roller rolls on the side surface of the rib while sandwiching the rib of the second cam with the adjacent rolling roller. Accordingly, it is possible to effectively suppress backlash that is a gap between the side surface serving as the cam surface and the rolling roller, and the second cam follower can be reliably secured according to the swinging motion expressed on the cam surface of the second cam. Can be swung. As a result, the conversion to the swing achieved by the second cam and the second cam follower can be executed with high accuracy.

A tenth aspect of the present invention is the processing apparatus according to any one of the first to ninth aspects, wherein the plurality of swing arms are arranged at equal intervals along the circumferential direction of the cylindrical portion. The rotating member is provided with the second cam follower, the second cam, and the first cam follower corresponding to each swing arm.
According to the above invention, since the plurality of swing arms are arranged in the cylindrical portion, the number of processed parts formed per unit rotation of the cylindrical portion can be increased, and the processing capability of the processing apparatus can be increased. Can be improved.

According to an eleventh aspect of the present invention, in the processing apparatus according to any one of the first to tenth aspects, a fixed arm is fixed to the rotating member by causing a clamping surface to protrude from the outer peripheral surface of the cylindrical portion. The clamping surface sandwiches a portion of the work wound around the outer peripheral surface of the cylindrical portion with the clamping surface of the swinging arm in the closed state.
According to the above-described invention, the portion of the wound work can be reliably sandwiched, so that the part to be processed can be reliably formed in the portion.

According to a twelfth aspect of the present invention, in the processing apparatus according to the eleventh aspect, the continuous workpiece holds a liquid absorber disposed at a predetermined pitch along the continuous direction, and the liquid absorber. A continuous sheet and folded and overlapped at substantially the center in a direction orthogonal to the direction, the processed portion formed on the workpiece is a seal portion to which the continuous sheet is welded, and the fixed arm is An ultrasonic device that applies ultrasonic waves to the clamping surface, and an anvil having a welding pattern-shaped protrusion that is welded by the ultrasonic wave is provided on the clamping surface of the swing arm that faces the clamping surface. It is characterized by.
According to the said invention, a seal | sticker part can be formed with a predetermined pitch with respect to the workpiece | work of the product provided with the liquid absorption function.

  According to the present invention, a swing arm for forming a workpiece by sandwiching a continuous workpiece wound around a cylindrical portion of a rotating rotating member, and a cam mechanism for swinging and driving the swing arm A processing device capable of improving the opening / closing operation accuracy of the swing arm by converting the rotation of the rotating member into swing and transmitting the swing member to the swing arm by the cam mechanism. can do.

  The processing apparatus according to the present embodiment forms a part to be processed at a predetermined formation pitch with respect to a continuous workpiece traveling on a continuous production line. In the following description, a base material of a paper diaper is taken as an example of the continuous workpiece, and a seal part that joins the front and back bodies of the paper diaper is described as an example of a processed part formed on the base material. That is, the processing apparatus according to the present embodiment is a sealing apparatus that welds a workpiece in the form of a so-called continuous sheet.

  In the following, the processing apparatus of the present embodiment is referred to as “paper diaper and its base material”, “overview of the sealing apparatus”, “detailed description of the sealing apparatus”, “sealing operation of the sealing apparatus”, “ The reason why the cam mechanism can improve the opening / closing accuracy of the swinging arm will be described in the order of “the reason why the cam mechanism can improve the opening / closing operation accuracy”.

<<< Paper diapers and their base materials >>>
First, a paper diaper and its base material are demonstrated with reference to FIG. 2A and 2B. FIG. 2A is a perspective view showing a finished product of a pants-type paper diaper. FIG. 2B is a perspective view for explaining the components of the paper diaper, in which the finished product of FIG. 2A is developed on a flat surface at the crotch and is disassembled into components in the thickness direction. Yes.

  The unfolded paper diaper 1 shown in FIG. 2B is a sheet laminate in which a liquid-permeable top sheet 2, a liquid absorbent body 4, and a liquid-impermeable back sheet 3 are stacked in this order. As the material of the liquid absorber 4, for example, pulverized pulp mixed with a superabsorbent polymer is used, and as the material of the top sheet 2 and the back sheet 3, thermoplastic fibers as heat welding materials are woven fabrics. Or a non-woven fabric or a film. The liquid absorber 4 is intermittently adhered to the back sheet 3 by a hot melt adhesive or the like, and the back sheet 3 and the top sheet 2 are also intermittently adhered by the adhesive or the like.

  The sheet laminate is folded along the crotch portion 13 with the top sheet 2 facing inward, and one folded portion is a front body 10 and the other portion is a back body 11. The front body 10 and the back body 11 are joined to each other by a seal portion 14 formed at the side end portions 10a and 11a around the waist, whereby the waist opening 7 and the pair of leg openings 8 shown in FIG. 2A. , 8 are formed as a finished product. Each opening 7 and 8 has a ribbon-like waistline elastic member 5 or leg elastic member 6 attached to the inner surface of the backsheet 3 in a stretched manner. It comes in close contact with the torso and legs.

  Such a paper diaper 1 is continuously produced in a continuous production line. That is, the base material of the paper diaper that is transported through the line is transported in the form of a continuous sheet in which the top sheet 2 and the back sheet 3 are continuous in the transport direction, and is subjected to appropriate processing in each step of the line. In the final process, the product is divided in units of products in the transport direction to obtain a finished product 1 shown in FIG. 2A.

  FIG. 3A is a perspective view showing the state of the base material of the paper diaper conveyed in the sealing step including the sealing device, and FIG. 3B is a perspective view showing the state of the base material immediately before that.

  The base material 1a at the time of being transported to the sealing step is obtained by sticking the liquid absorber 4 at a product pitch in the transport direction between the continuous sheets of the top sheet 2 and the back sheet 3 as shown in FIG. 3B. 1b is folded back along the crotch 13 which is the center in the width direction as shown in FIG. 3A, and the front body side 10 and the back body side 11 are overlapped. As shown in FIG. 3B, a leg opening 8 is formed between the liquid absorbers 4 and 4 adjacent to each other in the transport direction, and along the leg opening 8 and the crotch part 13, the above-described leg opening 8 is formed. A leg-around elastic member 6 is attached. The waistline elastic member 5 is also adhered along the end corresponding to the waistline opening 7.

  However, as for the base material 1a of the state of FIG. 3A, the front body side 10 and the back body side 11 are not yet joined. For this reason, with respect to the base material 1a, the sealing device performs a heat-welding process on the portions corresponding to the side end portions 10a and 11a around the trunk to form the seal portion 14, whereby the predecessor of the base material 1a. The front side 10 and the back side 11 are joined together and sent to the next process. A pair of seal portions 14 is formed at positions adjacent to each other. Then, in the subsequent steps, the product is divided along the dividing line 15 between the pair of seal portions 14 and 14 to be the above-described finished product 1.

<<< Overview of sealing device >>>
4 to 9 are views showing the appearance of the sealing device. FIG. 4 is a front perspective view, FIG. 5 is a rear perspective view, FIG. 6 is a front view, FIG. 7 is a rear view, and FIG. Is a side view and FIG. 9 is a top view. FIG. 10 is a central longitudinal sectional view of the sealing device. In the drawings other than FIG. 4 and FIG. 6, the support frame 34 and the pair of guide rolls 90a and 90b are omitted.

  As shown in FIG. 4, the sealing device 20 rotates as a support base 30 and a rotary member that is driven and rotated by a rotation center shaft 42 (see FIG. 10) supported rotatably on the support base 30. A disk 40, a drum 50 held on the rotating disk 40 with the rotation center axis 42 aligned with the center axis, and a fixed arm 64 provided with a clamping surface positioned near the outer peripheral surface of the drum 50; A swing arm 63 swingably supported by the rotary disk 40 so as to be openable and closable with respect to the clamping surface, and the rotation of the rotary disk 40 is converted into swing and transmitted to the swing arm 63. A cam mechanism and a pair of guide rolls 90a and 90b provided on the upstream side and the downstream side of the drum 50 for winding the base material 1a over a predetermined range in the rotation direction of the drum 50 are provided. In FIG. 4 to FIG. 9, gray is a clamping unit 60 that is a unit unit that forms the seal portion. The clamping unit 60 includes the swing arm 63, the fixed arm 64, and a second cam mechanism 70, which will be described later, which is a part of the cam mechanism.

On the other hand, as shown in FIG. 4 and FIG. 6, the base material 1a continuously transported at a predetermined transport speed from the previous process is substantially the same as the transport speed by being wound around the upstream guide roll 90a. It is wound around the outer peripheral surface of the drum 50 rotating at a peripheral speed at a predetermined winding position. Then, the wound portion of the base material 1a moves by the predetermined range by the rotation of the drum 50 without sliding with respect to the drum 50, reaches a predetermined unwinding position, and is unwound after being unwound here. It is wound around the side guide roll 90b and sent to the next process.
And while the portion of the wound base material 1a passes through the predetermined range from the winding position to the unwinding position, the swing arm 63 of the clamping unit 60 corresponding to the portion of the base material 1a is The part is released by the closing and opening operation, thereby forming a seal part as a part to be processed.

  As shown in FIGS. 4 and 7, the clamping unit 60 including the swing arm 63 and the fixed arm 64 is provided with, for example, six as shown in the figure while being equally spaced along the circumferential direction of the drum 50. That is, they are provided every 60 ° along the circumferential direction. Therefore, according to this sealing device 20, each time the drum 50 rotates once together with the rotary disk 40, the sealing portion can be formed at every length obtained by dividing the circumferential length of the drum 50 into approximately six equal parts. Incidentally, the formation pitch of the seal portion varies depending on, for example, each product size of the SML of the disposable diaper. In the seal device 20 of the present embodiment, a plurality of drums 50 having different external dimensions are connected to the rotary disk. 40, and a mechanism capable of moving the position of the swing arm 63 in the radial direction of the drum 50. This allows the product size to be changed.

<<< Detailed description of sealing device >>>
Hereinafter, the structure etc. with which the sealing apparatus 20 is provided are demonstrated in detail.

(1) Support base and rotating disk As shown in FIG. 4, the support base 30 is vertically installed from the support base 32 and a support base 32 fixed with anchor bolts or the like on the foundation of the production line. The support frame 34 is provided.

  As shown in FIG. 10, a cylindrical bearing case 80 is fixed to the support frame 34 in a state where its cylindrical axis is directed in the horizontal direction. The horizontal rotation center shaft 42 is rotatably supported by a pair of bearings 89 and 89 that the bearing case 80 holds on the inner peripheral side thereof in the cylinder axial direction. As the bearings 89 and 89, for example, a tapered roller bearing can be suitably used.

  In order to prevent foreign matter from adhering to the bearings 89 and 89 and leakage of the bearing lubricating oil to the outside of the case 80, lid members 80a and 80b for sealing the inside of the case 80 are provided at both cylindrical ends of the bearing case 80. These lid members 80a and 80b are bolted to the cylinder ends.

  However, the lid members 80a and 80b are formed with circular through holes 80c and 80d through which the rotation center shaft 42 is passed, and both ends of the rotation center shaft 42 pass through the through holes 80c and 80d. Projecting outward from the cylindrical end of the bearing case 80. The rotary disk 40 having a substantially circular outer shape is concentrically fixed to one end 42a, and a pulley (not shown) is concentrically fixed to the other end 42b. Rotational power is transmitted from a drive source such as a motor via a belt (not shown), and the rotary disk 40 rotates around the axis of the rotation center shaft 42. The rotation direction is counterclockwise in the front view of the sealing device 20 shown in FIG. Further, for convenience of explanation, the 0 o'clock direction in the front view of the figure is defined as a 0 ° rotation position, and the rotation position is defined by a counterclockwise angle therefrom. In addition, the board surface on the support frame 34 side of the rotating disk 40 is a back board face, and the opposite board face is a front board surface.

  O-rings 80e and 80f are provided between the bearing case 80 and the lid members 80a and 80b for preventing leakage of the bearing lubricating oil in the bearing case 80 and for preventing dust in the case 80, and the lid. Oil seals 80 g and 80 h are interposed between the through holes 80 c and 80 d of the members 80 a and 80 b and the rotation center shaft 42.

(2) Drum As shown in FIGS. 4 and 6, the drum 50 is mounted concentrically on the front surface of the rotating disk 40. The drum 50 is a cylindrical body that rotates together with the rotary disk 40, and the base material 1a of the paper diaper is wound around an outer peripheral surface thereof with a rotational position of about 290 ° as a winding position, and about 170 ° from there. The rotation position of about 100 ° (= 290 ° + 170 ° -360 °) rotated by the winding angle is set as the unwinding position.

  As shown in FIG. 11, the drum 50 is composed of six arc-shaped divided pieces 50 a divided into six equal parts along the circumferential direction, and each arc-shaped divided piece 50 a is a rotating disk via a stay 52. 40 is attached. In FIG. 11, the sealing device 20 is shown with one arcuate segment 50a removed. In the same figure, the fixed arm 64 disposed inside the drum 50 is removed, and the swing arm 63 is shown in gray.

  As shown in FIG. 10, a through hole 50b is formed in the outer peripheral surface portion of the drum 50 facing the swing arm 63 in the closed state. The clamping surface 64b of the fixed arm 64 located on the inner side of the drum 50 protrudes from the outer peripheral surface of the drum 50 through the through hole 50b, whereby the swing arm 63 located on the outer side of the drum 50 and Thus, the base material 1a wound around the outer peripheral surface of the drum 50 can be sandwiched. In FIG. 10, the fixed arm 64 and the swing arm 63 are shown in gray.

  The drum 50 is provided with small-diameter, medium-diameter, and large-diameter drums corresponding to the product sizes of, for example, SML paper diapers. By changing the drum 50 of the rotating disk 40, the above-mentioned product size change is possible. It is possible to cope with. That is, the circumferential length of each drum 50 is set to a length approximately six times the formation pitch of the seal portion of the corresponding product size.

(3) Clamping unit, fixed arm, and swing arm (3-A) Clamping unit As shown in FIG. 7, the six clamping units 60 described above are arranged radially on the back surface of the rotating disk 40. . The clamping unit 60 includes a swing arm 63, a fixed arm 64, and a second cam mechanism 70 as a part of a cam mechanism that opens and closes the swing arm 63. The swing arm 63 and the fixed arm 64 are disposed beside the arm.

  The housing 72 of the second cam mechanism 70 is a substantially rectangular parallelepiped box. A front wall 72c (see FIG. 18), which will be described later, of the six walls is pressed against the mounting surface 40b of the back panel by the pressing member 66 in a surface contact state. Is held at a predetermined mounting position.

  FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. In this figure, the lower side is shown as the front. FIG. 13 is a central longitudinal sectional view showing a part broken away along the line XIII-XIII in FIG. As shown in FIG. 12, the pressing member 66 is fixed to a pair of wall portions 66a standing on both sides of the clamping unit 60 on the back side board surface, and bolts 66b to the end surfaces of the wall portion 66a. And a pressing plate 66c. And the said holding | maintenance is achieved by pressing the convex part 72a which protrudes from the both-sides wall surface of the said housing 72 against the said back side board | substrate surface side with the pressing plate 66c. Therefore, if the tightening torque of the bolt 66b is loosened to release the pressing force, the holding is released.

  The attachment position of the clamping unit 60 can be adjusted by sliding in the direction in which the swing arm 63 and the fixed arm 64 move along the radial direction of the drum 50 (hereinafter referred to as the unit moving direction). As described above, unless the positions of the swing arm 63 and the fixed arm 64 are changed in accordance with the outer diameter of the drum 50 mounted on the rotary disk 40, the outer periphery of the drum 50 is driven by the arms 63 and 64. This is because the base material 1a wound around the surface cannot be sandwiched.

  As a mechanism for adjusting the slide, the holding unit 60 of the present embodiment includes a guide structure 68 that guides the holding unit 60 so as to be slidable in the unit moving direction, and feeds the holding unit 60 in the unit moving direction. A feed screw mechanism 69 is provided. The guide structure 68 includes a guide groove 68a formed on the mounting surface 40b along the unit moving direction, and an engaging convex portion 68b formed on the wall surface of the front wall 72c of the housing 72 and engaged with the guide groove. Consists of Then, the engaging projection 68b engages with the guide groove 68a to guide the entire clamping unit 60 in the unit moving direction. The feed screw mechanism 69 provides feed by a combination of a male screw and a female screw. As shown in FIG. 13, the male screw 69a is inserted into a through hole 72b that penetrates the front wall 72c of the housing 72 in the unit moving direction. One end portion of the male screw 69 is attached to a bracket 69b fixed to the wall portion 66a of the pressing member 66, and the other end portion is attached to a bracket 40c erected on the back side surface of the rotating disk 40. The bearings 69c and 69d are supported so as to be rotatable around the axis. On the other hand, the female screw 69e is fixed to the through hole 72b while being screwed into the male screw 69a. Therefore, if the male screw 69a is rotated, the clamping unit 60 can be moved in the unit moving direction through the movement of the female screw 69e in the axial direction.

  By the way, as shown in FIG. 7, a slit 40d is formed along the radial direction of the drum 50 in the portion of the rotating disk 40 that faces the swing arm 63 and the fixed arm 64 in this attached state. Then, through the slit 40d, as shown in FIG. 10, the ends of the arms 63 and 64 are allowed to extend from the back side to the front side of the rotary disk 40, and the base material 1a wound around the drum 50 is sandwiched. In addition, the entire clamping unit 60 can be moved in the unit moving direction when the attachment position is adjusted. In FIG. 10, the swing arm 63 and the fixed arm 64 are shown in gray.

(3-B) Fixed Arm As shown in FIG. 10, the fixed arm 64 is fixed to the housing 72 with a bolt or the like (not shown). The fixed arm 64 extends from the back side to the front side of the rotary disk 40 through the slit 40d, and the tip thereof is located on the inner peripheral surface side of the drum 50. An ultrasonic device 64 a that oscillates ultrasonic waves is fixed to the tip, and the oscillation surface 64 b of the ultrasonic device 64 a passes through the through hole 50 b of the drum 50 and is more outward than the outer peripheral surface of the drum 50. Projects by a predetermined amount. The oscillating surface 64b is a portion that contacts the substrate 1a wound around the drum 50, and functions as the clamping surface 64b. The oscillation surface 64 b is substantially parallel to the tangential plane of the outer peripheral surface of the drum 50.

(3-C) Oscillating arm The oscillating arm 63 is supported by the housing 72 via bearings 73b and 73c, which will be described later, and is fixed to a second output shaft 76 which is rotatable around the axis. By swinging the second output shaft 76, the second output shaft 76 swings in a plane including the axis 42 c of the rotation center shaft 42 of the rotating disk 40 and the radial line segment of the rotating disk 40. The range of motion of this swing is substantially parallel to the surface of the rotary disk 40 from the clamping position (see the upper swing arm 63 in FIG. 10), which is in a state of being substantially parallel to the rotation center shaft 42. This is a range up to the standby position (see the lower swing arm 63 in FIG. 10), and the swing angle range is 90 °. In the clamping position, the clamping surface 65a of the anvil unit 65 provided at the distal end portion 63a of the swing arm 63 faces the oscillation surface 64b so as to clamp the substrate 1a with the oscillation surface 64b. It has become.

  FIG. 14A shows a side view of the swing arm 63, and FIG. 14B shows a front view taken along line BB in FIG. 14A. The anvil unit 65 holds the anvil 65b formed with a convex portion 65e having the same shape as the pattern shape of the weld portion 14 on the clamping surface 65a, and is bolted to the mounting surface 63b of the tip portion 63a. An elastic body 65d is interposed between the anvil base portion 65c and the anvil 65b. A pair of convex portions 65e are formed in a straight line along the direction of the rotation center axis 42c on the sandwiching surface 65a of the anvil 65b, whereby the welded portions 14, 14 can be formed in the pattern shape shown in FIG. 3A. Yes. The elastic body 65d is a bag body in which air is press-fitted, and two elastic bodies 65d are provided side by side in the front-rear direction of the rotation center axis 42c. The internal air pressure can be adjusted by changing the supply pressure of an air supply pipe (not shown) communicating with the bag body by a pressure reducing valve or the like, and this adjustment adjusts the clamping force when sandwiching the substrate 1a. To do. Note that the air supply pipe is connected to the one-touch joint 65 f provided in the anvil unit 65, thereby communicating with the inside of the bag body. The anvil base portion 65c has a pair of frame portions 65g at positions on both sides of the elastic body 65d, and these frame portions 65g restrain the lateral movement of the anvil 65b accompanying the deformation of the elastic body 65d. I have to.

  Here, the swing operation of the swing arm 63 will be described. The swing angle of the swing arm 63 is uniquely assigned according to the rotational position of the swing arm 60. That is, the swing arm 63 is opened and closed according to the rotational position. do.

  The graph on the upper left in FIG. 15 shows the relationship between the rotation position of the swing arm 63 and its opening / closing angle. The horizontal axis of the graph is the rotational position of the swing arm 63, and the vertical axis is the opening / closing angle of the swing arm 63.

  As shown in the upper left graphs of FIGS. 6 and 15, the swing arm 63 starts the opening operation from the fully closed state in which the opening / closing angle is 0 ° at the rotation position of 60 °. The opening operation is started at the rotation position of 60 ° because the base material 1a of the drum 50 is unwound at the rotation position of about 100 °, that is, the swing arm 63 is moved at the unwinding position. This is because it is necessary to be sufficiently away from the outer peripheral surface of the drum 50.

  When the swinging arm 63 that continues the opening operation reaches a rotation position of 190 °, the opening / closing angle thereof becomes a fully open state of 90 °, but when this fully open state is reached, the operation immediately switches to the closing operation. Then, this closing operation is continued until the rotational position of 313 ° where the fully closed state is achieved. Note that the winding position at which the substrate 1a starts to be wound around the drum 50 is set at the rotational position of 290 °. At this rotational position, the swinging arm 63 is sufficiently open. The arm 63 does not hinder winding.

Next, the swing arm 63 continues the fully closed state through a 360 ° (0 °) rotational position to a 60 ° rotational position. During this fully closed state, the fixed arm 64 facing the swinging arm 63 oscillates the ultrasonic wave on the substrate 1a to perform the welding process.
Although the rotation position makes a round at the 60 ° rotation position, the swing arm 63 repeats the opening / closing operation corresponding to the rotation position in the same manner as described above.
The power source of the intermittent swinging operation that stops in the fully closed state as described above is the rotational operation of the rotating disk 40. Then, the opening / closing operation of the swing arm is created by converting the rotation operation of the rotary disk 40 into the swing operation by the cam mechanism described below.

(4) Cam mechanism This cam mechanism converts the rotation of the rotary disk 40 into intermittent rotation and outputs it to the first cam follower, and converts the rotation of the first output shaft 84 into oscillation. And the second cam mechanism 70 for outputting to the second cam follower. The second cam follower corresponds to the second output shaft 76 to which the swing arm 63 is fixed.

  FIG. 15 is a timing diagram showing how the first cam mechanism and the second cam mechanism 70 are converted. The lower left graph shows the relationship between the rotation angle of the rotary disk 40, which is the input of the first cam mechanism, and the rotation angle of the first cam follower, which is the output, and the right graph shows the second cam mechanism. 7 shows the relationship between the rotation angle of the first cam follower, which is the input of 70, and the rotation angle of the second cam follower, which is the output thereof. The graph on the upper left shows the relationship between the rotation angle of the rotating disk 40 obtained by combining these two timing diagrams and the rotation angle of the second cam follower, and the output relative to the input of the cam mechanism as a whole. Shows the relationship. The rotation angle of the rotary disk 40 is also the rotation position of the swing arm 63 described above, and the rotation angle of the second cam follower is also the opening / closing angle of the swing arm 63.

  As shown in the lower left graph, the rotation of the rotary disk 40 is inputted as it is to the first cam mechanism, which is converted into intermittent rotation and output to the first cam follower. Specifically, the first cam follower rotates in the range from the 40 ° rotation position of the swing arm 63 to the 340 ° rotation position, and in the range from the 340 ° rotation position to the 40 ° rotation position. Stops.

  The rotation of the first cam follower is directly input to the second cam mechanism 70 as shown in the graph on the right. The second cam mechanism 70 converts this input rotation into a swing and outputs it to the second cam follower. Specifically, at the rotation angle of 15 ° to 180 ° of the first cam follower, the second cam follower rotates forward to open and reverse at the subsequent rotation angle of 180 ° to 338 °. It rotates and closes, and in the remaining rotation angles from 338 ° to 15 °, it stops without rotating and maintains the fully closed state.

  In the range where the second cam mechanism 70 stops, the second cam follower does not rotate even if the first cam follower rotates. For this reason, in the upper left graph showing the relationship between the rotation angle of the rotary disk 40 and the rotation angle of the second cam follower, the range of the rotational position where the rotation stops is from the above-mentioned range of 340 ° to 40 °, 313 It extends in the range from ° to 60 °. Thus, in the upper right graph showing the relationship between the input and the output of the cam mechanism as a whole, as described above, the cam mechanism swings from the 60 ° rotation position to the 313 ° rotation position and opens and closes. In addition, from the rotation position of 313 ° to the rotation position of 60 °, it stops and maintains the fully closed state.

  The reason why the first cam mechanism and the second cam mechanism are used in combination is to improve the opening / closing operation accuracy of the swing arm 63, which will be described later.

(4-A) First Cam Mechanism FIGS. 16 and 17 are explanatory views of the first cam mechanism. FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. 10 showing a part in side view, and only one of the six second cam mechanisms 70 is shown in cross-section and remains. About five, only the external shape is shown. FIG. 17 is the same central cross-sectional view as FIG. 10 and shows only the portion of the globoidal cam 81 related to the first cam mechanism in a side view.

  As can be understood with reference to FIGS. 10, 16 and 17 as appropriate, the first cam mechanism includes a globoidal cam 81 as a first cam integrally formed on the outer periphery of the bearing case 80 fixed to the support frame 34. An outer case 82 that is fixed to the back surface of the rotating disk 40 while covering the globoidal cam 81 and rotates together with the rotating disk 40, and is supported by the outer case 82 via a bearing 83a and rotates around the axis. And a first output shaft 84 as a free first cam follower. One end of the first output shaft 84 has a turret 84b that engages with the cam surface of the outer peripheral surface of the globoidal cam 81 via a cam follower 84a as a rolling roller. The first output shaft 84 that rotates along the outer circumferential cam surface of the globoidal cam 81 along with the rotation of the rotary disk 40 rotates intermittently around the axis through the engagement of the cam surface and the cam follower 84a. It has become. Hereinafter, each component of the first cam mechanism will be described in detail.

(4-A-1) Globoidal Cam The globoidal cam 81 is formed on the outer peripheral surface of the bearing case 80 concentric with the rotation center shaft 42 as shown in FIG. That is, a tapered rib 81a is formed on the outer peripheral surface in a substantially spiral shape that is displaced in the direction of the rotation center axis 42 along the circumferential direction, and the side surfaces on both sides of the rib 81a function as the cam surface. It is supposed to be. The rib 81a will be described at the first output shaft 84.

(4-A-2) Outer Case As shown in FIGS. 7 and 16, the outer case 82 is a 12-corner star-shaped box in front view, that is, includes 12 side plates 82 a and 82 b. A cylindrical portion and a pair of the star-shaped flat plates 82c and 82c covering the opening at both ends of the cylindrical portion are provided. The star-shaped corners are alternately arranged with sharp corners and obtuse corners, the angles of the six acute corners are equal, and the angles of the six obtuse corners are also the same. Both are equal.

  As shown in FIGS. 7 and 10, a circular through hole 82d for inserting the bearing case 80 is formed concentrically with the rotation center shaft 42 at the center of the pair of flat plates 82c, 82c. . Then, in a state where the bearing case 80 is inserted into the through hole 82d, one flat plate 82c is fixed in surface contact with the back side surface of the rotating disk 40, whereby the outer case 82 is fixed to the rotating disk 40. ing. An oil seal 82e is interposed between the through hole 82d and the outer peripheral surface of the bearing case 80 for leak prevention of the cam lubricating oil supplied into the outer case 82 and dust prevention in the outer case. ing. The oil seal 82e maintains the inside of the outer case 82 in a highly sealed state in cooperation with an O-ring of an assembly opening described later.

  On the other hand, as shown in FIGS. 7 and 16, the twelve side plates 82a and 82b are a pair of side plates 82a and 82b adjacent to each other with a sharp corner portion therebetween, and each set has one clamping unit. 60. Then, of the pair of side plates 82a and 82b, the first output shaft 84 is assembled to the outer case 82 on the side plate 82a facing the clamping unit 60, as shown in the enlarged view of FIG. An assembly opening 82f for this purpose is formed.

(4-A-3) First Output Shaft As shown in FIG. 16, the first output shaft 84 has a substantially cylindrical long bearing case 83, and the cylindrical shaft on the inner peripheral surface of the bearing case 83. The bearing case 83 is rotatably supported around the shaft by a pair of bearings 83a and 83a provided at both ends in the direction. In this supported state, both end portions of the first output shaft 84 protrude from the bearing case 83, and a circular turret 84b is concentrically provided at one end portion thereof, and the second cam is provided at the other end portion. A fitting portion 84 c for connecting with the second input shaft 74 of the mechanism 70 is formed. The turret 84b is provided with six cam followers 84a at equal intervals along the circumferential direction, and the fitting portion 84c has a rectangular cross section.

  As shown in FIG. 16, the first output shaft 84 is assembled to the outer case 82 by inserting the bearing case 83 into the outer case 82 while passing through the assembly opening 82f of the side plate 82a, and the other side plate 82b. In this state, the flange 83b at the cylinder end of the bearing case 83 is bolted to the peripheral portion of the assembly opening 82f. .

  As shown in the enlarged view of FIG. 16, an O-ring is provided between the assembly opening 82f and the outer peripheral surface of the bearing case 83 for leakage prevention of the cam lubricating oil and dust prevention in the outer case 82. 83c is interposed. The O-ring 83c cooperates with the oil seal 82e of the through hole 82d described above to maintain the inside of the outer case 82 in a highly sealed state, and to the cam surface of the globoidal cam 81 accommodated therein and the cam follower 84a. It is possible to effectively prevent the foreign matter from adhering and to perform the conversion to intermittent rotation achieved by the first cam mechanism with high accuracy.

  Also, a lid 83d for closing the cylinder end is bolted to the cylinder end of the bearing case 83, and the first output shaft 84 is inserted into a through hole 83e formed in the lid 83d. . An oil seal 83f is interposed between the through hole 83e and the outer peripheral surface of the first output shaft 84 for leakage prevention of the bearing lubricant and dust prevention in the bearing case 83, and a lid portion 83d. And an O-ring 83g is interposed between the tube ends.

  As shown in FIG. 16, in this assembled state, the axial center direction of the first output shaft 84 is orthogonal to the rotation center shaft 42 because it faces the unit moving direction, The turret 84b of the first output shaft 84 is located in the vicinity of the outer peripheral surface of the globoidal cam 81, and the cam follower 84a can roll on the side surface of the rib 81a of the globoidal cam 81. Accordingly, when the first output shaft 84 supported by the outer case 82 is rotated along the outer peripheral surface of the globoidal cam 81 by the rotation of the rotating disk 40, the cam follower 84a is moved along with the rib 81a shown in FIG. As a result, the cam follower 84a that is displaced in the direction of the rotation center shaft 42 and rolls on the rib 81a is sequentially replaced, whereby the first output shaft 84 rotates about its axis.

  In addition, as shown in FIG. 17, this cam follower 84a rolls the said side surface, pinching the side surface of the both sides of the said rib 81a with the adjacent cam follower 84a. Therefore, backlash, which is a gap that may occur between the side surface and the cam follower 84a, is suppressed, and the first output shaft 84 can be reliably rotated in accordance with the rotation operation expressed in the rib 81a. Yes.

  The rotational motion expressed in the rib 81a is an intermittent rotational motion, that is, the rib 81a is displaced with a rotation section in which the position of the rib 81a in the direction of the rotation central axis 42 is displaced along the circumferential direction. Has no stopping section. The first output shaft 84 rotates when the first output shaft 84 is positioned in the rotation section, and stops without rotating when the first output shaft 84 is positioned in the stop section. 84 is intermittently rotated.

  The lower left graph in FIG. 15 described above shows the state of conversion to the intermittent rotation. The horizontal axis of this graph is the rotation angle of the rotary disk 40, and the vertical axis is the rotation angle of the first output shaft 84. The horizontal axis is also the rotational position of the swing arm 63 corresponding to the first output shaft 84.

  As shown in this graph, when the swing arm 63 corresponding to the first output shaft 84 reaches the rotational position of 40 °, the first output shaft 84 starts rotating. Then, when the rotation position reaches 340 °, the rotation stops and enters a stationary state. This stationary state is maintained up to the rotational position of 40 °. When the rotational position reaches 40 °, the first output shaft 84 starts rotating again. Thereafter, the rotation operation and the stopping operation are repeated according to the rotation position. That is, on the cam surface of the globoidal cam 81, the rotation section is set over an angular range from a rotation position of 40 ° to a rotation position of 340 °, and the stop section is a rotation position of 340 °. Is set over an angular range from a rotation position of 40 ° to 40 °.

  As shown in FIG. 16, six such first output shafts 84 are provided so as to correspond to each of the six clamping units 60 described above, and each of the first output shafts 84 has its axial center. The fitting portion 84c at the extending end is provided in the housing 72 of the second cam mechanism 70 of the corresponding holding unit 60. It is stored in. The fitting portion 84 c is connected to the second input shaft 74 of the second cam mechanism 70 and transmits rotation to the second input shaft 74.

(4-B) Second Cam Mechanism FIG. 18A shows a central longitudinal sectional view of the second cam mechanism 70, and FIG. 18B shows a sectional view taken along line BB in FIG. 18A. FIG. 19 shows an enlarged view of the vicinity of the second input shaft in FIG. 18A, and FIG. 20 shows an enlarged view of the vicinity of the second output shaft in FIG. 18B. 18A, the cam surface of the globoidal cam 75 and the turret 76b are shown in a side view, and the swing arm 63 and the fixed arm 64 are shown by a two-dot chain line. In FIG. 18B, only the turret 76b is shown in a side view. Furthermore, about FIG. 19, while showing the center part of the globoidal cam 75 fractured | ruptured, the 1st output shaft 84 of the inside is shown by the side view.

  As shown in FIGS. 16, 18A, and 18B, the second cam mechanism 70 includes a second input shaft 74 that is supported by a housing 72 via a bearing 73a and is rotatable about an axis, and the second input shaft 74. A globoidal cam 75 as a second cam integrally formed with the input shaft 74, and a second output shaft as a second cam follower supported by the housing 72 via bearings 73b and 73c and rotatable around the axis. 76. The second input shaft 74 is concentrically connected to the first output shaft 84 of the first cam mechanism described above by a predetermined connection structure while restricting relative rotation with each other. The second output shaft 76 includes a turret 76 b that engages with the cam surface of the globoidal cam 75 via a cam follower 76 a and the swing arm 63. Therefore, when the rotation of the first output shaft 84 is input to the second input shaft 74 through the connection structure and the globoidal cam 75 rotates, the second output shaft is engaged through the engagement between the cam surface and the cam follower 76a. 76 swings around the axis, whereby the swing arm 63 opens and closes. Hereinafter, each component of the second cam mechanism will be described in detail.

(4-B-1) Housing As shown in FIG. 18, the housing 72 has a substantially rectangular parallelepiped appearance as described above, and the housing 72 is a front wall portion 72 c that is held on the back side surface of the rotating disk 40. A rear wall 72d that opposes the front wall 72c, and four side walls 72e, 72f, 72g, and 72h that are integrally fixed to four sides of the front wall 72c and the rear wall 72d, respectively. I have.

  As shown in FIG. 19, the pair of side wall portions 72e and 72f facing each other with a gap in the unit moving direction have insertion holes 72i and 72i for inserting the second input shaft 74, respectively. Is formed. A substantially ring-shaped bearing case 173a holding the bearing 73a is bolted to the inner peripheral surface of each insertion hole 72i. Each end of the second input shaft 74 is fitted to the inner ring of each bearing 73a, so that the second input shaft 74 can rotate while aligning its axial direction with the unit moving direction. It is supported. Further, a substantially ring-shaped outer ring retainer 273a for restricting the axial movement of the bearing 73a is fixed to a portion of the inner peripheral surface of the insertion hole 72i closer to the shaft end than the bearing 73a.

  An O-ring 373a is interposed between the insertion hole 72i and the outer peripheral surface of the bearing case 173a for leak prevention of the cam lubricating oil and dust prevention in the housing 72. The O-ring 373a cooperates with O-rings 273b and 273c of the second output shaft 76 described later to maintain the inside of the housing 72 in a highly sealed state. An O-ring 473a is interposed between the inner peripheral surface of the bearing case 173a and the outer peripheral surface of the outer ring retainer 273a for leakage prevention of bearing lubricant and dust prevention in the bearing case 173a. An oil seal 573a is interposed between the inner peripheral surface of the outer ring retainer 273a and the outer peripheral surface of the second input shaft 74.

(4-B-2) Second Input Shaft As described above, the second input shaft 74 is arranged with its axial center aligned with the unit moving direction. The second input shaft 74 is connected to the first output shaft 84 via a predetermined connection structure, and the rotation around the axis of the first output shaft 84 causes the second input shaft 84 to rotate. The rotation around the axis of 74 is transmitted to the second input shaft 74 as it is, and the second input shaft 74 can move relative to the first output shaft 84 in the unit moving direction while maintaining this transmission relationship. It has become. The reason why the relative movement is possible in the unit moving direction is because the holding unit 60 having the second input shaft 74 needs to be moved in the unit moving direction when changing the size as described above. .

  This connection structure is achieved by forming a through hole 74a concentrically with the second input shaft 74 and fitting the fitting portion 84c of the first output shaft 84 concentrically with the through hole 74a. For example, in the present embodiment, the through hole 74a is formed in a rectangular shape, and the cross-sectional shape of the first output shaft 84 is also formed in the same rectangular shape. The relative rotation of the two input shafts 74 is restricted, and the rotation is transmitted. The first output shaft 84 is arranged along the unit moving direction, and the through hole 74a is concentric with the axis of the second input shaft 74, so that the rotation transmission relationship is maintained. The second input shaft 74 is movable in the unit moving direction.

  Depending on the position of the clamping unit 60 in the unit moving direction, as shown in FIG. 19, the fitting portion 84a of the first output shaft 84 may protrude from the through hole 74a. There is a possibility that foreign matter may adhere to the fitting portion 84a. Therefore, a cap 172 having a predetermined height that covers the through hole 74 a is fixed to the housing 72. As a result, the fitting portion 74a is completely accommodated in the housing 72 over its entire length, and as a result, it is possible to reliably prevent a decrease in the transmission accuracy of the rotation due to adhesion of foreign matter.

  Further, as shown in FIG. 18A, a globoidal cam 75 is formed concentrically with the shaft center at the center portion of the second input shaft 74. That is, on the outer peripheral surface of the second input shaft, a tapered rib 75a is formed in a substantially spiral shape that is displaced in the direction of the rotation central shaft 42 along the circumferential direction, and the side surfaces on both sides of the rib 75a are formed. It functions as the cam surface. The rib 75a will be described at the second output shaft 76.

(4-B-3) Second Output Shaft As shown in FIG. 18B, a pair of side wall portions 72g and 72h in a direction orthogonal to the side wall portions 72e and 72f that support the second input shaft 74 are Through holes 72j and 72k for passing the second output shaft 76 are formed in each. Bearings 73b and 73c are respectively provided on the inner peripheral surfaces of the through holes 72j and 72k, and the end portions of the second output shaft 76 are connected to the side wall portions 72g and 72h via the bearings 73b and 73c. Thus, the second output shaft 76 is arranged so that its axial center direction is orthogonal to the second input shaft 74 and parallel to the surface of the rotary disk 40. Yes. Thus, the swing arm 76 fixed to the second output shaft 76 includes the axis line 42c of the rotation center shaft 42 of the rotating disk 40 and the radial line segment of the rotating disk 40 as described above. It swings in the plane.

  As shown in FIG. 20, the through-hole 72j to which the swing arm 63 is fixed uses a bearing 73b having a diameter larger than that of the other through-hole 72k. This is because the support rigidity of the arm 63 is increased and the operation accuracy of the swing arm 63 is improved. A substantially ring-shaped outer ring retainer 173b for restricting the axial movement of the bearing 73b is bolted to the inner peripheral surface on the shaft end side of the through hole 72j provided with the large-diameter bearing 73b. Then, through the inner peripheral side of the outer ring retainer 173b, the end portion 76c of the second output shaft 76 protrudes to the outside of the housing 72, and the swing arm 63 is fixed to the end portion 76c. The moving arm 63 is disposed on the side of the housing 72. On the other hand, a through-hole 72k provided with a small-diameter bearing 73c is covered with a lid 173c that covers the through-hole 72k from the outside, and is bolted, that is, an end 76d supported by the bearing 73c is a housing. 72.

  Between the through hole 72j and the outer peripheral surface of the outer ring retainer 173b, and between the through hole 72k and the lid portion 173c, O for leakage of the cam lubricating oil and dust prevention in the housing 72, respectively. Rings 273b and 273c are interposed. The O-rings 273b and 273c cooperate with the above-described O-ring 373a of the insertion hole 72i associated with the second input shaft 74 to maintain the inside of the housing 72 in a highly sealed state, and the globoidal cam 75 accommodated in the inside. It is possible to effectively prevent foreign matter from adhering to the cam surface and the cam follower 76a, and the conversion to swinging achieved by the second cam mechanism 70 can be executed with high accuracy.

  An oil seal 373b is interposed between the inner peripheral surface of the outer ring retainer 173b and the outer peripheral surface of the second output shaft 76 for leakage prevention of the bearing lubricating oil and dust prevention inside the outer ring retainer 173b. Yes.

  By the way, as shown in FIGS. 18A and 18B, the turret 76b is formed at a substantially central portion in the axial direction of the second output shaft 76, and the outer peripheral surface thereof is equally spaced along the circumferential direction. Three cam followers 76a are provided at intervals of 90 °. The middle cam follower 76 a rolls on the side surface of the rib 75 a of the globoidal cam 75 of the second input shaft 74. That is, when the second input shaft 74 rotates, the middle cam follower 76a is displaced in the axial direction of the second input shaft 74 by the rib 75a while rolling the side surface of the rib 75a. Thus, the second output shaft 76 rotates around its axis.

  The rib 75a includes a forward rotation section in which the position of the axial rib 75a is displaced along the circumferential direction, a reverse rotation section in which the position of the rib 75a is displaced in the reverse direction of the forward rotation section, and a non-displaced stop. When the middle cam follower 76a is located in the forward rotation section, the second output shaft 76 rotates in the direction in which the swing arm 63 is closed, and when the middle cam follower 76a is located in the reverse rotation section. Rotate in the direction to open. The stop section is set between the forward rotation section and the reverse rotation section. When the stop section is located in the stop section, the second output shaft 76 maintains the swing arm 63 in a fully closed state. To stop without rotating. Each time the second input shaft 74 rotates once, the opening / closing operation and the stopping operation in the fully closed state are performed only once.

  In the stationary section and the forward rotating section in the vicinity of the stationary section, the middle cam follower 76a rolls on the side surface while sandwiching the side surfaces on both sides of the rib 75a with the adjacent cam follower 76a. . Therefore, backlash, which is a gap that may be generated between the side surface and the cam follower 76a, is suppressed, and the second output shaft 76 can be reliably rocked in accordance with the rocking motion expressed by the rib 75a.

  The graph on the right side in FIG. 15 described above shows the state of conversion to this oscillation. The vertical axis of this graph is the rotation angle of the second input shaft 74, and the horizontal axis is the rotation angle of the second output shaft 76. Since the second input shaft 74 is connected to the first output shaft 84, the vertical axis is also the rotation angle of the first output shaft 84 of the first cam mechanism.

  As shown in this graph, when the rotation angle of the second input shaft 74 reaches 15 °, the second output shaft 76 starts to rotate in the forward direction from 0 °, whereby the swing arm 63 is opened from the fully closed state. Start operation. This forward rotation is continued until the rotation angle of the second input shaft 74 reaches 180 °. At 180 °, the rotation angle of the second output shaft 76 is 90 ° and the swing arm 63 is fully opened. Here, the second output shaft 76 switches its rotation direction to the reverse direction, and the swing arm 63 is rotated. Starts closing. The closing operation is continued until the rotation angle of the second output shaft 76 at which the swing arm 63 is fully closed becomes 0 °. This 0 ° is when the rotation angle of the second input shaft 74 reaches 338 °, and the fully closed state is continued from here to the 15 °. As described above, when the rotation angle of the second input shaft 74 reaches 15 °, the second output shaft 76 starts to rotate in the forward direction from 0 °, and thereafter, according to the rotation angle of the second input shaft 76. Thus, the rotating operation and the stopping operation are repeated.

  That is, the forward rotation section is set on the cam surface of the globoidal cam 75 over an angular range from 15 ° to 180 ° along the circumferential direction, and the reverse rotation section is 180 ° to 338 °. Further, the stop section is set over an angular range of 338 ° to 15 °.

<<< Sealing operation of sealing device >>>
Here, the sealing operation of the sealing device 20 will be described with reference to FIGS. 6 and 21 as appropriate. FIG. 21 is a diagram for explaining a state in which the base material 1a is wound around the drum 50, and an enlarged view of the vicinity of the drum 50 from the rotation position of about 270 ° to the rotation position of about 20 ° in FIG. As shown. Hereinafter, the sealing operation of one of the six sandwiching units 60 will be described, but it goes without saying that the other sandwiching units 60 also perform the same operation at the same rotational position.

  As shown in FIG. 6, the base material 1a continuously transported from the previous step at a predetermined transport speed is changed in the transport direction to the direction of the drum 50 by the upstream guide roller 90a. Is wound around the outer peripheral surface of the drum 50 rotating at the same peripheral speed as the transport speed from the winding position which is a rotational position of about 290 °. In this winding, as shown in FIG. 19, adjustment is made so that the oscillation surface 64b of the fixed arm 64 comes into contact with portions corresponding to the side end portions 10a and 11a around the trunk of the base material 1a. . Specifically, the side end portions 10a and 11a correspond to a portion of the base material 1a intermediate between the liquid absorbers 4 adjacent to each other, and the oscillation surface 64b of the fixed arm 64 is in contact with this portion. It has been adjusted. Then, the portions 10a and 11a of the base material 1a that come into contact with the oscillation surface 64b pass through the respective rotational positions counterclockwise, and at the unwinding position as the rotational position of about 100 ° as shown in FIG. It is unwound by the downstream guide roller 90b and the conveyance direction is changed to the next process. Then, while the portions 10a and 11a of the substrate 1a pass through the rotational position from 290 ° to 100 °, the swing arm 63 of the clamping unit 60 facing the portions 10a and 11a is as follows. By performing an opening and closing operation as shown, the pair of seal portions 14 and 14 are formed in the portions 10a and 11a of the base material 1a.

First, the swing arm 63 that has started to close from the rotational position of 190 ° is fully closed at the rotational position of 313 °, and the convex portion 65e of the holding surface 65a of the swing arm 63 is oscillated by the fixed arm 64. The base material 1a is sandwiched between the surface 64b. Then, an ultrasonic wave is oscillated from the oscillation surface 64b for a predetermined time from the rotation position of 320 °, for example, the rotation position after 313 °, and is thereby sandwiched between the oscillation surface 64b and the convex portion 65e. The portions 10a and 11a of the substrate 1a vibrate and generate heat and are welded. Since the energy required for this welding varies depending on the product size, the predetermined time for oscillating the ultrasonic wave is preferably controlled by setting the amount of energy given to the workpiece for each product size.
Then, after passing through the 360 ° (0 °) rotation position and approaching the 60 ° rotation position, the swing arm 63 starts to open, and the swing arm 63 is sufficiently opened at the 100 ° rotation position. The substrate 1a is unwound from the drum 50.

<<< Reason why the cam mechanism of this embodiment can improve the opening / closing operation accuracy of the swing arm >>>
Here, the reason why the opening / closing operation accuracy of the swing arm 63 can be improved by using the first cam mechanism and the second cam mechanism 70 in combination as in the cam mechanism of the present embodiment will be described.

  In the sealing device, in order to ensure the welding time of the seal portion 14, for example, in the range from the 340 ° rotation position to the 40 ° rotation position shown in the lower left graph of FIG. It is necessary to maintain 63 in a fully closed state. For this reason, in order to create an opening / closing operation using only the first cam mechanism, the angular range of 340 ° to 40 ° corresponding to the range of the rotational position on the cam surface of the globoidal cam 81 is entirely A stop section that stops in the closed state must be set. Accordingly, the angle range on the cam surface to which the opening / closing operation of the swing arm 63 can be assigned is limited to the remaining 300 ° angle range from 40 ° to 340 °. That is, when the opening / closing operation of the swing arm 63 is created by one cam mechanism, the opening / closing operation cannot be expressed by using the entire circumference of the globoidal cam 81, and is narrower than this, for example, the above-described 300 ° angle range. It must be expressed as

  On the other hand, in the cam mechanism of this embodiment, as described above, the first output shaft 84 is rotated once in the 300 ° angular range of the globoidal cam 81 according to the first cam mechanism. Since the first output shaft 84 is connected to the globoidal cam 75 of the second cam mechanism 70, the globoidal cam 75 is also rotated once by this one rotation, and the second output shaft 76 is rotated once per one rotation. The swing arm 63 is opened and closed only once.

  That is, since the globoidal cam 75 of the second cam mechanism 70 makes one rotation with respect to the 300 ° angular range of the globoidal cam 81 of the first cam mechanism, the angular range in which the swinging motion can be expressed is set to the outer peripheral surface of the globoidal cam 75. Thus, the opening / closing operation accuracy of the swing arm, which is the swing operation accuracy, can be improved.

  As shown in the graph on the right in FIG. 15, in this embodiment, the swinging motion is 323 ° from 15 ° to 338 ° on the cam surface of the globoidal cam 75 of the second cam mechanism 70. Although it is expressed using an angle range (= 338 ° -15 °) and not expressed using the entire circumference, even in that case, the angle range is 23 ° compared to the aforementioned 300 °. It has been expanded.

<<< Other Embodiments >>>>
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible.

  In the present embodiment, a cylindrical body is used as the drum 50 as the cylindrical portion, but the shape is not limited to this, and a cylindrical body having an equilateral polygonal cross section may be used.

  In this embodiment, although the base material 1a of the paper diaper was shown as an example of the continuous workpiece | work, it is not restricted to this at all. In other words, the present invention can be applied to any continuous workpiece in which the portion to be processed is formed at a predetermined formation pitch. For example, the continuous workpiece may be a base material for cooking paper.

  Further, the workpiece supplied to the drum 50 may be a plurality of webs, or a discontinuous workpiece may be a combination of continuous webs.

  In the present embodiment, welding is shown as an example of processing performed by the processing apparatus, but the present invention is not limited to this. That is, the present invention can be applied to any work that can be performed when the clamping unit 60 clamps the work portion wound around the drum 50. For example, the clamping surface 65a and the fixed arm 64 of the swing arm 63 are applicable. Alternatively, a perforation blade may be provided on the clamping surface 64a so as to form a perforation when the workpiece is sandwiched. Furthermore, it may be cut by providing a cutting blade, may be pushed in, or a combination of welding with them.

  In the present embodiment, the first output shaft 84, the second input shaft 74, and the bearings 83a, 73a, 73b, and 73c of the second output shaft 76 are not particularly mentioned. In order to increase the rotational accuracy and rigidity around the axis of the shaft 74 and the second output shaft 76, a tapered roller bearing is preferably used.

It is a front view which shows the outline of the conventional sealing device. It is center sectional drawing which shows a part of conventional sealing device by a side view. It is a figure for demonstrating the drive mechanism of the clamping arm of the conventional sealing apparatus. It is a front view of the groove cam which concerns on the drive mechanism of the conventional sealing device. It is a front view of the groove cam which improved the opening / closing operation accuracy of the swing arm. 2A is a perspective view showing a finished product of a pants-type paper diaper, and FIG. 2B is a perspective view of the paper diaper exploded and exploded. FIG. 3A is a perspective view showing the state of the base material of the paper diaper conveyed in the sealing step, and FIG. 3B is a perspective view showing the state of the base material immediately before that. It is a perspective view of the front side of a sealing device. It is a perspective view of the back side of a sealing device. It is a front view of a sealing device. It is a rear view of a sealing device. It is a side view of a sealing device. It is a top view of a sealing device. It is a center longitudinal cross-sectional view of a sealing device. It is the perspective view of the front side of the sealing device of the state which removed one arc-shaped division | segmentation piece and all the fixed arms, and has expanded and shown a part. It is sectional drawing of the XII-XII line arrow in FIG. It is sectional drawing of the XIII-XIII line arrow in FIG. 14A is a side view of the swing arm, and FIG. 14B is a front view taken along the line BB in FIG. 14A. The upper left graph is a timing diagram showing the opening / closing operation of the swing arm, the lower left graph is a timing diagram showing the state of conversion to intermittent rotation performed by the first cam mechanism, and the right graph is It is a timing diagram which shows the mode of the conversion to the rocking | fluctuation which a 2nd cam mechanism performs. It is sectional drawing of the XVI-XVI line arrow in FIG. 10, and has expanded and shown a part. It is a center longitudinal cross-sectional view of a sealing device. FIG. 18A is a center longitudinal sectional view of the second cam mechanism, and FIG. 18B is a sectional view taken along line BB in FIG. 18A. FIG. 18B is an enlarged view of the vicinity of the second input shaft in FIG. 18A. FIG. 18B is an enlarged view of the vicinity of the second output shaft in FIG. 18B. It is a figure for demonstrating a mode that the base material is wound around the drum.

Explanation of symbols

1a Base material for paper diapers (continuous workpiece)
20 Sealing device (processing device)
40 Rotating disk (Rotating member)
50 drums (tube section)
60 Clamping unit 63 Swing arm 64 Fixed arm 75 Globoidal cam (second cam)
76 Second output shaft (second cam follower)
81 Globoidal cam (first cam)
84 First output shaft (first cam follower)

Claims (12)

A rotating member that holds the cylindrical portion and rotates in one direction around the central axis of the cylindrical portion, and a swing arm that is swingably supported by the rotating member so as to be openable and closable with respect to the outer peripheral surface of the cylindrical portion. And a cam mechanism that converts the rotation of the rotating member into a swing and transmits the swing to the swing arm,
A swing arm corresponding to a portion of the wound workpiece while the continuous workpiece wound around the cylindrical portion over a predetermined range in the rotation direction passes through the predetermined range by the rotation of the cylindrical portion. In a processing apparatus for forming a workpiece by releasing the portion by closing and opening the workpiece,
The cam mechanism includes a first cam that expands rotation of the rotating member by a predetermined angle to rotation of the first cam driven node by an angle larger than the predetermined angle, and the expanded first cam driven node. A processing apparatus comprising: a second cam that converts rotation into oscillation of a second cam follower. The processing apparatus according to claim 1,
The first cam converts the rotation corresponding to the predetermined angle out of the rotation corresponding to one rotation of the rotation member into the rotation corresponding to one rotation of the first cam follower, and the rotation of the rotation member. For rotations other than the predetermined angle in minutes, the rotation is not converted to the rotation of the first cam follower,
The processing device according to claim 1, wherein the second cam converts rotation of one rotation of the first cam follower into one swing of the second cam follower. The processing apparatus according to claim 2, wherein
The rotating member is supported by a support base so as to be rotatable around a central axis of the cylindrical portion,
The first cam is a globoidal cam fixed to the support base concentrically with the central axis and having a cam surface on an outer peripheral surface;
The first cam follower is a shaft that is provided on the rotating member and rotates along the outer peripheral surface of the globoidal cam with the rotation of the rotating member;
The processing apparatus according to claim 1, wherein the rotating shaft body intermittently rotates around an axis center when the engaging portion engages with the cam surface. In the processing apparatus according to claim 3,
The cam surface of the first cam has a rotation section in which the position of the cam surface is displaced in the direction of the central axis along the circumferential direction, and a stationary section that is not displaced,
The shaft body has its axial center oriented in a direction perpendicular to the central axis, and the outer peripheral surface of the shaft body is appropriately spaced along the circumferential direction as the engaging portion. A plurality of rolling rollers are provided,
When the shaft body is located in the rotation section, the rolling roller that rolls on the cam surface sequentially moves while the rolling roller that rolls on the cam surface moves in the direction of the central axis. The shaft rotates around the axis,
When the shaft body is located in the stationary section, a rolling roller that rolls on the cam surface does not move in the central axis direction, so that the shaft body does not rotate around the axis. Processing equipment. The processing apparatus according to claim 4, wherein
The first cam includes a rib on the outer peripheral surface,
A pair of side surfaces of the rib functions as the cam surface,
The processing apparatus according to claim 1, wherein the rolling roller that rolls on one side surface sandwiches the rib with an adjacent rolling roller that rolls on the other side surface. The processing apparatus according to any one of claims 2 to 5,
The first cam is covered in a substantially sealed state by a case fixed to the rotating member,
Inside the case is housed the shaft body rotatably supported by the case,
One end portion of the shaft projecting outward from the case is accommodated in a housing that accommodates the second cam, and the one end portion is concentric while the relative rotation of the second cam is restricted by the second cam. The processing apparatus characterized by being connected to. The processing apparatus according to claim 6, wherein
The housing is fixed to the rotating member, and the second cam and the second cam follower are accommodated in a substantially sealed state therein,
The second cam is a globoidal cam having a cam surface on an outer peripheral surface, which is rotatably supported by the housing around an axis.
The second cam follower is a shaft body that is rotatably supported by the housing around the shaft center, and the shaft body swings around the shaft center when the engaging portion engages with the cam surface. And
The processing apparatus, wherein the swing arm is fixed to one end of the shaft projecting outward from the housing. In the processing apparatus according to claim 7,
The cam surface of the second cam includes a forward rotation section in which the position of the cam surface is displaced in the axial direction along the circumferential direction, and a reverse rotation section in which the cam surface is displaced in a direction opposite to the forward rotation section. Have
The shaft body of the second cam follower has its axis oriented in a direction perpendicular to the axis of the second cam, and the outer peripheral surface of the shaft body is engaged with the engagement along the circumferential direction. A plurality of rolling rollers as a part are provided,
The processing apparatus according to claim 1, wherein the shaft body swings around an axis when a rolling roller that rolls on a cam surface of the second cam moves in the axial direction of the second cam by the rotation of the second cam. The processing apparatus according to claim 8, wherein
The second cam includes a rib on the outer peripheral surface,
A pair of side surfaces of the rib functions as the cam surface,
The processing apparatus according to claim 1, wherein the rolling roller that rolls on one side surface sandwiches the rib with an adjacent rolling roller that rolls on the other side surface. The processing apparatus according to any one of claims 1 to 9,
A plurality of the oscillating arms are arranged while being equally spaced from each other along the circumferential direction of the cylindrical portion,
The rotating device is provided with the second cam follower, the second cam, and the first cam follower corresponding to each swing arm, respectively. In the processing apparatus in any one of Claims 1 thru | or 10,
A fixing arm is fixed to the rotating member by projecting a clamping surface from the outer peripheral surface of the cylindrical portion,
The processing apparatus characterized in that the clamping surface sandwiches a portion of the work wound around the outer peripheral surface of the cylindrical portion by the clamping surface of the swing arm in the closed state. The processing apparatus according to claim 11, wherein
The continuous workpiece includes a liquid absorber disposed at a predetermined pitch along the continuous direction, and a continuous sheet that holds the liquid absorber, and is folded at a substantially center in a direction orthogonal to the direction. Overlap,
The processed part formed on the workpiece is a seal part to which the continuous sheet is welded,
The fixed arm includes an ultrasonic device that applies ultrasonic waves to a sandwiching surface thereof,
The processing apparatus according to claim 1, wherein an anvil having a welding pattern-shaped protrusion that is welded by the ultrasonic wave is provided on a holding surface of the swing arm that faces the holding surface.

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