Manufacturing equipment for wearable items

Abstract

The present invention provides a manufacturing apparatus for a wearable article formed by joining multiple sheets together, which can suppress abnormal wear of the sheet joining mechanism. [Solution] The manufacturing apparatus for wearable articles comprises a conveying device for conveying laminated sheet-like materials, a rotating body that is rotationally driven, a joining mechanism attached to the rotating body, and a sheet joining device that joins the laminated sheet-like materials together, and has a mechanical drive mechanism. The joining mechanism has a first joining member and a second joining member, and ultrasonically joins the laminated sheet-like materials by sandwiching them between the first surface of the first joining member and the second surface of the second joining member. The mechanical drive mechanism moves the first joining member between a first position in which the first surface and the second surface are separated in a first direction perpendicular to the second surface, and a second position in which the first surface and the second surface sandwich a plurality of sheets. The mechanical drive mechanism includes a motor and a transmission mechanism that converts the force of the motor into the movement of the first joining member.

Description

【Technical Field】 【0001】 The present invention relates to a manufacturing apparatus for a wearing article, which manufactures a wearing article formed by joining a plurality of sheets to each other. 【Background Art】 【0002】 There is known a manufacturing apparatus for manufacturing a wearing article formed by joining a plurality of sheets to each other, as shown in Patent Document 1 (Japanese Patent Application Laid-Open No. 2021-171299). 【0003】 In such a manufacturing apparatus, in order to ultrasonically join a plurality of sheets, a sealing mechanism using a horn that ultrasonically vibrates and a disk-shaped anvil that moves while rotating on the horn, as shown in FIG. 15, may be used. 【0004】 The sealing mechanism shown in FIG. 15 will be described. In FIG. 15, reference numeral "1000" indicates the horn, reference numeral "2000" indicates the anvil, and reference numerals "T1, T2" indicate a plurality of sheets to be joined, respectively. 【0005】 When joining the sheets T1 and T2, the horn 1000 is ultrasonically vibrating. The anvil 2000 rotates in the direction of the solid arrow C1 and moves in the direction of the solid arrow B1 to the downstream end of the horn 1000 in the direction of the arrow B1. Thereafter, the anvil 2000 rotates in the direction of the broken-line arrow C2 and moves in the direction of the broken-line arrow B2 to behind the downstream end of the horn 1000 in the direction of the arrow B2. The anvil 2000 moves on the ultrasonically vibrating horn 1000, and the horn 1000 and the anvil 2000 sandwich the sheets T1 and T2 being conveyed, so that the sheet T1 and the sheet T2 are ultrasonically joined between the horn 1000 and the anvil 2000. Then, on the sheets T1 and T2, a seal is formed in a pattern corresponding to the seal pattern attached to the surface of the anvil 2000 or the horn 1000. 【Prior Art Documents】 【Patent Documents】 【0006】 [Patent Document 1] Japanese Patent Publication No. 2021-171299 [Overview of the Initiative] [Problems that the invention aims to solve] 【0007】 The inventors of this application have found that the following problems may arise when using a sealing mechanism as shown in Figure 15. 【0008】 When using a sealing mechanism as shown in Figure 15, in the desired proper state, the entire sealing surface of the horn 1000 that contributes to the joint is covered by the conveyed sheets T1 and T2. In this state, the anvil 2000 comes into contact with the horn 1000 via the sheets T1 and T2 when the sheets T1 and T2 are joined, so the anvil 2000 and the horn 1000 do not come into direct contact. However, for example, if the conveying position of the sheets T1 and T2 deviates from the proper conveying path, and a part of the horn 1000 is not covered by the sheets T1 and T2 (a gap "Y" is created), as shown in Figure 15, the anvil 2000 may come into direct contact with the horn 1000. If such a situation occurs, malfunctions such as abnormal wear (premature wear) of the anvil 2000 and the horn 1000 may occur. 【0009】 Furthermore, when sealing is performed using the structure shown in Figure 15, the anvil 2000 reciprocates over multiple sheets T1 and T2. During this process, contact with the anvil 2000 can cause the sheets T1 and T2 to shift, potentially resulting in a defect where the seal is applied to different positions on sheets T1 and T2 during the forward and return movements. [Means for solving the problem] 【0010】 The present invention relates to a manufacturing apparatus for wearable articles that manufactures wearable articles having two or more sheet-like materials. The manufacturing apparatus for wearable articles comprises a conveying device and a sheet joining device. The conveying device conveys a laminated sheet-like material in which at least a first sheet-like material and a second sheet-like material are overlapped from the two or more sheet-like materials. The sheet joining device joins the sheet-like materials of the laminated sheet-like material conveyed by the conveying device to each other. The sheet joining device comprises a rotating body, a joining mechanism, and a mechanical drive mechanism. The rotating body is rotationally driven. The joining mechanism is attached to the rotating body. The joining mechanism comprises a first joining member and a second joining member. The joining mechanism ultrasonically joins the laminated sheet-like material, which is conveyed along the circumferential direction of the rotating body, by sandwiching it between the first surface of the first joining member and the second surface of the second joining member. The mechanical drive mechanism moves the first joining member between a first position and a second position. In the first position, the first and second surfaces of the first joining member are separated in a first direction perpendicular to the second surface of the second joining member. In the second position, the first and second surfaces of the first joining member are close together in the first direction, and the first surface sandwiches multiple laminated sheet-like materials between itself and the second surface. The mechanical drive mechanism includes a motor and a transmission mechanism that converts the force of the motor into the movement of the first joining member. [Effects of the Invention] 【0011】 In the manufacturing apparatus for wearable articles of the present invention, in a sheet joining apparatus that joins a sheet by sandwiching it between the first surface of a first joining member and the second surface of a second joining member, the first joining member moves in a direction perpendicular to the second surface of the second joining member, so that the first surface and the second surface sandwich a laminated sheet-like material. 【0012】 Therefore, unlike the case where the first surface moves parallel to the second surface while being in close proximity to it in the first direction, the occurrence of abnormal wear of the first and second joining members is more easily suppressed. 【0013】 Furthermore, unlike the case where the first surface of the first joining member reciprocates along the second surface of the second joining member, this method is less prone to problems caused by overlapping ultrasonic bonding. [Brief explanation of the drawing] 【0014】 [Figure 1] It is a front view depicting a disposable diaper, which is an example of a wearable article manufactured by the manufacturing apparatus of the wearable article of the present invention. [Figure 2] It is a plan view depicting a state where the side seal portion of the disposable diaper of FIG. 1 is unfolded. [Figure 3] It is a block diagram showing the manufacturing apparatus of the wearable article according to an embodiment of the present invention together with the process flow. [Figure 4A] FIG. 4A is a schematic process diagram showing a part of the process of the manufacturing method of the wearable article of an embodiment. [Figure 4B] FIG. 4B is a schematic process diagram showing a part of the process of the manufacturing method of the wearable article of an embodiment, and shows the continuation of the process shown in FIG. 4A. [Figure 5] It is a schematic side view of the sheet joining device of the manufacturing apparatus of FIG. 3 as viewed along the axial direction of the rotating body of the sheet joining device. [Figure 6] It is a schematic perspective view depicting the periphery of one joining mechanism of the sheet joining device of FIG. 3. [Figure 7] It is a side view of the periphery of one joining mechanism of the sheet joining device of FIG. 3 as viewed along the circumferential direction of the rotating body, and shows a cross section of the connection portion of the transmission mechanism. [Figure 8] It is a side view of one joining mechanism and a part of the mechanical drive mechanism of the sheet joining device of FIG. 3 as viewed along the circumferential direction of the rotating body. [Figure 9] It is an enlarged view within the circle IX of the two-dot chain line in FIG. 7. [Figure 10] It is another example of the shape of the connection portion of the transmission mechanism of the mechanical drive mechanism of the sheet joining device of FIG. 3. [Figure 11] It is a schematic view of the periphery of the connection portion of the transmission mechanism of the mechanical drive mechanism of the sheet joining device of FIG. 3. [Figure 12] It is a view depicting the cylindrical cam of the mechanical drive mechanism of the sheet joining device of FIG. 3 unfolded in a planar shape. [Figure 13] Among the configurations of the manufacturing apparatus of FIG. 3, it is a block diagram showing the configurations related to the operation of the sheet joining device. [Figure 14]It is a diagram schematically depicting the movement of an anvil of a joining mechanism of a sheet joining device. [Figure 15] It is a diagram schematically showing a sheet joining device using a conventional roller type anvil. 【Embodiments for Carrying Out the Invention】 【0015】 Hereinafter, an embodiment of a manufacturing apparatus for a wearable article according to the present invention will be described with reference to the drawings. 【0016】 Note that the embodiments described below are merely examples of the present invention and do not limit the scope of the present invention. Those skilled in the art will understand that various modifications can be made to the following embodiments without departing from the spirit and scope of the present invention described in the claims. 【0017】 (1) Wearable article An example of a wearable article manufactured by the wearable article manufacturing apparatus 100 of the present invention will be described with reference to FIGS. 1 and 2. 【0018】 FIG. 1 is a front view showing a disposable diaper 1 (hereinafter simply referred to as diaper 1) according to an example of a wearable article manufactured by a wearable article manufacturing apparatus 100 (hereinafter simply referred to as manufacturing apparatus 100). FIG. 2 is a plan view depicting diaper 1 with the side seal portion 5 unfolded. 【0019】 In the present embodiment, a disposable diaper 1 will be described as an example of a wearable article. However, the wearable article manufactured by the manufacturing apparatus 100 is not limited to a disposable diaper as long as it is a wearable article manufactured using the sheet joining device 200 described later. For example, the wearable article may be a disposable pant or a disposable medical gown. 【0020】 Details of diaper 1 will be described. 【0021】 In the following explanation, terms such as "front," "back," "left," and "right" may be used. Unless otherwise specified, these terms refer to the direction from the wearer's perspective when diaper 1 is worn by the wearer. 【0022】 Diaper 1 has a symmetrical structure, as shown in Figure 1. Diaper 1 mainly consists of an absorbent body 2, a front torso 3, and a rear torso 4, as shown in Figure 2. 【0023】 As shown in Figure 2, the absorbent body 2 extends between the front torso portion 3 and the rear torso portion 4 and is a component that covers the wearer's crotch. The front torso portion 3 is a component that covers the front of the wearer's torso, and the rear torso portion 4 is a component that covers the rear of the wearer's torso. 【0024】 The absorbent body 2, front torso 3, and rear torso 4, which make up diaper 1, will be described in detail below. In the following description, the direction in which the diaper extends around the wearer's waist when worn (left and right directions in Figures 1 and 2) will be referred to as the waist direction X1, and the direction perpendicular to the waist direction X1, which is the longitudinal direction of the absorbent body 2, will be referred to as the vertical direction X2. 【0025】 Diaper 1 is a pull-up type diaper. In its finished state, the absorbent body 2 of diaper 1 is folded in half in the middle in the vertical direction X2, and the left and right ends E1 (see Figure 2) of the front torso 3 in the waist direction X1 overlap each other with the left and right ends E2 (see Figure 2) of the rear torso 4 in the waist direction X1, as shown in Figure 1. The ends E1 of the front torso 3 in the waist direction X1 and the ends E2 of the rear torso 4 in the waist direction X1 are joined at the side seal portion 5 (see Figure 1). 【0026】 The absorbent body 2 includes a top sheet, a back sheet, and an absorbent core positioned between the top sheet and the back sheet (not shown). The top sheet is a sheet positioned on the skin side of the wearer and is permeable to liquids. The back sheet is a sheet positioned on the opposite side of the top sheet (the outside that does not face the wearer's skin) and is impermeable to liquids. The absorbent core is made of crushed pulp, or crushed pulp mixed with a superabsorbent polymer. The absorbent core absorbs bodily fluids such as the wearer's urine. 【0027】 As shown in Figure 2, the absorbent body 2 is a substantially rectangular member. The absorbent body 2 extends between the front body 3 and the rear body 4 with the vertical direction X2 as its longitudinal direction. The absorbent body 2 is joined to the front body 3 at the center of the front body 3 in the circumference direction X1, and is joined to the rear body 4 at the center of the rear body 4 in the circumference direction X1. 【0028】 The front torso 3 and rear torso 4 each have an inner sheet S1 that faces the wearer's skin and an outer sheet S2 that does not face the wearer's skin (which is positioned on the outside when the wearer puts it on). The inner sheet S1 and the outer sheet S2 are laminated together. The outer sheet S2 not only constitutes the front torso 3 and rear torso 4, but also extends continuously to connect the front torso 3 and rear torso 4. The outer sheet S2 positioned between the front torso 3 and rear torso 4 in the vertical direction X2 forms the leg hole portion. Furthermore, as shown in Figure 2, the absorbent body 2 is positioned on the outer sheet S2 positioned between the front torso 3 and rear torso 4 in the vertical direction X2. 【0029】 Elastic members F are placed in the front torso 3 and rear torso 4 to fit the diaper 1 to the wearer. In the front torso 3 and rear torso 4, the elastic members F are placed between the inner sheet S1 and the outer sheet S2, and in this state, the inner sheet S1 and the outer sheet S2 are joined together. In addition, the elastic members F are joined to at least one of the inner sheet S1 and the outer sheet S2. For example, the elastic members F can be made of materials including multiple strands of elastic thread, flat elastic, or thermoplastic resin. 【0030】 In the finished diaper 1, the ends E1 of the front torso 3 and E2 of the rear torso 4 are joined together at the side seal portion 5 in the torso direction X1. The side seal portion 5 is intermittently arranged in the vertical direction X2 at the ends E1 of the front torso 3 and E2 of the rear torso 4. 【0031】 (2) Manufacturing apparatus and manufacturing method for wearable articles The manufacturing apparatus 100 and manufacturing method of diaper 1 will be described with reference to Figures 3, 4A, and 4B. Figure 3 is a block diagram showing the manufacturing apparatus 100 of diaper 1 as an example of a wearable item, along with the process flow. Figures 4A and 4B are schematic process diagrams showing parts of the manufacturing process of diaper 1 as an example of a wearable item, respectively. Figure 4B shows the continuation of the process in Figure 4A. Note that the process described below is merely an example and may be modified as appropriate, as long as there is no inconsistency. 【0032】 As shown in Figure 3, the manufacturing apparatus 100 mainly comprises a sheet splitting and conveying device 110, an outer sheet strip conveying device 120, an elastic member supply device 130, a joining device 140, an elastic member deactivation device 150, an absorber body joining device 160, a leg hole forming device 170, a folding device 180, a sheet joining device 200, and a cutting device 190. 【0033】 The sheet splitting and conveying device 110 divides a continuously conveyed sheet into two in a direction perpendicular to the conveying direction using a blade (not shown), forming a sheet-like inner sheet strip S1a (process P1 in Figure 4A). Hereafter, the conveying direction of the sheet will be referred to as the "conveying direction Z1". The direction perpendicular to the "conveying direction Z1" will be referred to as the "width direction Z2". The inner sheet strip S1a is a strip of sheets formed by continuously joining together the inner sheets S1 that constitute the front body 3 when the diaper 1 is made, or a strip of sheets formed by continuously joining together the inner sheets S1 that constitute the rear body 4 when the diaper 1 is made. The sheet splitting and conveying device 110 conveys the two inner sheet strips S1a formed by splitting a single sheet in the conveying direction Z1 (same direction) with a predetermined distance between them in the width direction Z2. 【0034】 The outer sheet belt conveying device 120 conveys the sheet-like outer sheet belt S2a (a continuous sheet that becomes the outer sheet S2 when formed into a diaper 1) in the same direction as the two rows of inner sheet belts S1a (in the conveying direction Z1) (see process P2 in Figure 4A). The two rows of inner sheet belts S1a are positioned such that one end (outer edge) of each inner sheet belt S1a in the width direction Z2 overlaps with the end of each of the outer sheet belts S2a in the width direction Z2. 【0035】 In a configuration other than that of this embodiment, the inner sheet band S1a may be positioned such that its end (outer edge) in the width direction Z2 is located inside that of the outer sheet band S2a in the width direction Z2. The end of the outer sheet band S2a in the width direction Z2 (the portion located outside the inner sheet band S1a in the width direction Z2) may be folded inward to overlap the absorbent body 2 in a later step to form a structure that prevents bodily fluids from leaking out of the body of the diaper 1. A detailed explanation is omitted here. 【0036】 The elastic member supply device 130 supplies the elastic member F, which is stretched longitudinally, between the inner sheet strip S1a and the outer sheet strip S2a (see step P3 in Figure 4A). For convenience, the outer sheet strip conveying device 120 and the elastic member supply device 130 are described in this order, but in reality, the elastic member F is supplied to either the inner sheet strip S1a or the outer sheet strip S2a first, and then the other sheet strip S2a, S1a is supplied, so that the elastic member F is sandwiched between the inner sheet strip S1a and the outer sheet strip S2a. 【0037】 The joining device 140 joins the elastic member F, the inner sheet strip S1a, and the outer sheet strip S2a using means such as thermal bonding or ultrasonic bonding to form a continuous sheet 3a that will become the front body portion 3 when formed on the diaper 1, and a continuous sheet 4a that will become the rear body portion 4 when formed on the diaper 1 (see step P4 in Figure 4A). The continuous sheet 3a is a strip of sheet in which the front body portion 3 is continuously joined in the longitudinal direction, and the continuous sheet 4a is a strip of sheet in which the front body portion 3 is continuously joined in the longitudinal direction. 【0038】 The elastic member deactivation device 150 performs a deactivation process by cutting a portion of the elastic member F at the location where the absorber body 2 is to be placed on the continuous sheets 3a and 4a (see step P5 in Figure 4A). 【0039】 The absorber body joining device 160 positions the absorber body 2 so as to straddle the continuous sheet 3a and the continuous sheet 4a at the location where the elastic member deactivation device 150 has deactivated the elastic member F, and joins the continuous sheet 3a and the continuous sheet 4a to the absorber body 2 (see step P6 in Figure 4B). The joining method is, for example, ultrasonic welding or heat welding. 【0040】 The leg hole forming device 170 forms an oval-shaped hole H in the outer sheet band S2a that will become the leg hole of the diaper 1 (see step P7 in Figure 4B). 【0041】 The folding device 180 folds the absorbent body 2 in the center in the width direction Z2, overlapping the continuous sheet 3a and the continuous sheet 4a (see step P8 in Figure 4B). In Figure 4B, for illustrative purposes, the sheets are depicted as discontinuous before and after folding by the folding device 180, but in reality, the sheets are not cut along the width direction Z2 at this point, and the sheets are continuous. 【0042】 The sheet joining device 200 ultrasonically joins the continuous sheet 3a and the continuous sheet 4a, which are transported in a folded state by the folding device 180, to form a laminated sheet (integrated continuous sheet 3a, continuous sheet 4a, outer sheet strip S2a) at or near the positions that will become the end E1 of the front body portion 3 and the end E2 of the rear body portion 4 when formed into a diaper 1, thereby forming a side seal portion 5 (see process P9 in Figure 4B). In Figure 4B, the area around where the side seal portion 5 is formed is shown with hatching. The sheet joining device 200 will be described in detail later. 【0043】 The conveying device that transports the laminated sheet material (a sheet material formed by laminating continuous sheet 3a, continuous sheet 4a, and outer sheet strip S2a) that has been stacked onto the sheet bonding device 200 is referred to here as the conveying device 500. The conveying device 500 transports the continuous sheet 3a, which is an example of the first or second sheet material, and the continuous sheet 4a, which is an example of the first or second sheet material, in an overlapping state. 【0044】 The cutting device 190 cuts the continuous sheet 3a, the continuous sheet 4a, and the outer sheet strip S2a between two side seal portions 5 that are positioned close together in the transport direction Z1 (see step P10 in Figure 4B). As a result, the diaper 1 shown in Figure 1 is separated from the subsequent continuous sheet 3a, the continuous sheet 4a, and the outer sheet strip S2a. 【0045】 (3) Sheet bonding device The sheet joining device 200 will be described with reference to Figures 5 to 14. 【0046】 Figure 5 is a schematic side view of the sheet joining device 200, viewed along the axial direction of the rotating body 210 of the sheet joining device 200. Figure 6 is a schematic perspective view showing the area around one joining mechanism 300 of the sheet joining device 200. Figure 7 is a side view of the area around one joining mechanism 300 of the sheet joining device 200, viewed along the circumferential direction of the rotating body 210. In Figure 7, the connection parts 460a and 460b of the transmission mechanism 402 are shown in cross-section. Figure 8 is a view of one joining mechanism 300 and a part of the mechanical drive mechanism 400 of the sheet joining device 200, viewed along the circumferential direction of the rotating body 210. Figure 9 is an enlarged view of the area within the dashed circle IX in Figure 7. Figure 10 is an example of another shape of the connection part 460a of the mechanical drive mechanism 400 of the sheet joining device 200. Figure 11 is a schematic view of the area around the connection parts 460a and 460b of the mechanical drive mechanism 400 of the sheet joining device 200. Figure 12 is a diagram showing the cylindrical cams 412 and 422 of the mechanical drive mechanism 400 unfolded in a planar manner. Figure 13 is a block diagram showing the configuration of the manufacturing apparatus 100 related to the operation of the sheet bonding apparatus 200. Figure 14 is a schematic diagram showing the movement of the anvil 320 of the bonding mechanism 300 of the sheet bonding apparatus 200. 【0047】 The sheet joining device 200 is a device that joins continuous sheets 3a and 4a, which are examples of first and second sheet-like materials, to each other, and which are transported by the transport device 500 in an overlapping state. 【0048】 The sheet joining device 200 mainly comprises a rotating body 210, a joining mechanism 300, and a mechanical drive mechanism 400 (see Figures 5 and 6). The manufacturing apparatus 100 also has a control device 600 that controls the operation of each part of the sheet joining device 200 and the conveying device 500 (see Figure 13). The control device 600 may also control the operation of equipment other than the sheet joining device 200 and the conveying device 500 of the manufacturing apparatus 100, but here, the control device 600 will be described as a device that controls the sheet joining device 200 and the conveying device 500. Furthermore, the control device 600 may be a single device, or multiple devices may cooperate to function as the control device 600. 【0049】 Let's explain each component. 【0050】 (3-1) Solid of revolution As shown in Figure 5, the rotating body 210 mainly comprises a rotating shaft 212 and a frame 214. The frame 214 has a substantially circular shape when viewed in the axial direction of the rotating shaft 212. The frame 214 is rotatably supported by the rotating shaft 212. The frame 214 of the rotating body 210 is rotationally driven by motors 470 and 480 that operate in coordination with the mechanical drive mechanism 400, which will be described later. 【0051】 The reason why the frame 214 of the rotating body 210 is driven by multiple motors 470 and 480 is that using multiple relatively small motors shortens the startup time (the time from the start of operation until the rotation speed of the rotating body 210 stabilizes at the desired rotation speed) and the braking time (the time from the stop command until the rotation of the rotating body 210 stops) compared to using one large motor. 【0052】 Multiple joining mechanisms 300 are attached to the frame 214 along the rotational direction of the rotating body 210 (the circumferential direction of the rotating body 210). In Figure 5, 10 joining mechanisms 300 are attached to the frame 214 of the rotating body 210, but the number of joining mechanisms 300 shown is merely an example and does not limit the present invention. 【0053】 The position of the joint mechanism 300 attached to the frame 214 can be adjusted radially in the direction of the rotating body 210 using an adjustment mechanism 216 (see Figure 7) provided on the frame 214. The adjustment mechanism 216 may be manually operated (for example, by turning a screw to change the position of the joint mechanism 300) or it may be driven by a motor or air cylinder. By providing the adjustment mechanism 216, it is possible to accommodate changes in the size of the wearable item (the spacing at which the side seal portions 5 are formed). 【0054】 (3-2)Joining mechanism The bonding mechanism 300 is a device that ultrasonically bonds continuous sheets 3a and 4a, which are transported along the circumferential direction of the rotating body 210 by a transport device 500. 【0055】 The joining mechanism 300 includes a horn 310 and an anvil 320 as examples of a first joining member and a second joining member. In this embodiment, the anvil 320 is an example of the first joining member in the claims, and the horn 310 is an example of the second joining member in the claims. However, it is not limited thereto, and the horn 310 may function as the first joining member in the claims, and the anvil 320 may function as the second joining member in the claims. In other words, the horn 310 may be moved between a first position and a second position, as described later, by a mechanical drive mechanism 400, and the anvil 320 may be fixed to the frame 214 of the rotating body 210. 【0056】 The horn 310 and the anvil 320 are joined ultrasonically by sandwiching a laminated sheet-like material, in which at least continuous sheet 3a and continuous sheet 4a overlap, between the second surface 312 of the horn 310 (see Figure 7) and the first surface 322 of the anvil 320 (see Figure 7). 【0057】 Furthermore, a seal pattern (a plurality of protrusions projecting toward the other side) is formed on one of the second surface 312 of the horn 310 and the first surface 322 of the anvil 320. When the continuous sheet 3a and the continuous sheet 4a are ultrasonically bonded, only the portions of the continuous sheet 3a and the continuous sheet 4a that are sandwiched between the second surface 312 of the horn 310 and the first surface 322 of the anvil 320 are ultrasonically bonded. Therefore, the continuous sheet 3a and the continuous sheet 4a have side seal portions 5 (see Figures 1 and 2) formed in a shape and arrangement corresponding to the seal pattern formed on one of the second surface 312 of the horn 310 and the first surface 322 of the anvil 320. 【0058】 The horn 310 is ultrasonically vibrated by an ultrasonic oscillator and ultrasonic transducer (not shown). The horn 310 of each joining mechanism 300 is fixed to the frame 214 of the rotating body 210 with its second surface 312 facing radially outward with respect to the axis of the rotating body 210. The continuous sheets 3a and 4a conveyed by the conveying device 500 are conveyed along the circumferential direction of the rotating body 210, with the sheets partially in contact with the second surface 312 of the horn 310 of the joining mechanism 300 in the conveying direction Z1. 【0059】 During operation of the sheet joining device 200, the horn 310, as the second joining member, rotates together with the frame 214 around the rotation axis 212 of the rotating body 210, but does not move relative to the frame 214. 【0060】 The anvil 320 is attached to the connection parts 460a and 460b of the mechanical drive mechanism 400, which will be described later. Although not limited in shape, the anvil 320 is a bar-shaped member that extends along the axial direction of the rotating body 210. The anvil 320 is attached to the connection parts 460a and 460b with its first surface 322 facing radially inward with respect to the axis of the rotating body 210. 【0061】 The anvil 320 rotates together with the frame 214 of the rotating body 210, and is also driven and moved by the mechanical drive mechanism 400. The anvil 320 of each joining mechanism 300 is driven by the mechanical drive mechanism 400 and moves relative to the horn 310 of that joining mechanism 300. The movement of the anvil 320 will be described later. 【0062】 (3-3) Mechanical drive mechanism The mechanical drive mechanism 400 is a mechanism that moves the anvil 320, which is an example of a first joining member, between a first position Po1 and a second position Po2 (see Figure 14). 【0063】 Figure 14(a) shows the anvil 320 located at the first position Po1, Figure 14(b) shows the anvil 320 located at the third position Po3 (described later), and Figure 14(c) shows the anvil 320 located at the second position Po2. In Figure 14, arrow D1 represents the radial direction of the rotating body 210, and arrow D2 represents the axial direction of the rotating body 210. 【0064】 The first position Po1 is the position in which the anvil 320 is in standby mode when the bonding mechanism 300 is not performing ultrasonic bonding (when the anvil 320 is not contributing to ultrasonic bonding). In the first position Po1, the first surface 322 of the anvil 320 is separated from the second surface 312 of the horn 310 in a first direction D1 (see Figure 14) perpendicular to the second surface 312 of the horn 310. 【0065】 The second position Po2 is the position where the anvil 320 is positioned when the bonding mechanism 300 performs ultrasonic bonding. At the second position Po2, in the first direction D1 (see Figure 14), the first surface 322 of the anvil 320 is in close proximity to the second surface 312 of the horn 310. Also at the second position Po2, the first surface 322 of the anvil 320 sandwiches the continuous sheet 3a and the continuous sheet 4a between itself and the second surface 312 of the horn 310. 【0066】 The mechanical drive mechanism 400 mainly includes motors 470 and 480 (see Figure 13) and a transmission mechanism 402 (see Figure 6) that converts the power of motors 470 and 480 into the operation of anvil 320. 【0067】 In one embodiment, the transmission mechanism 402 mainly includes connecting parts 460a and 460b, a shaft 458, a belt transmission mechanism 450, a cam mechanism, and a cleaning mechanism 490 (see Figures 6 and 7). 【0068】 The cam mechanism may be a planar cam mechanism or a three-dimensional cam mechanism. In this embodiment, the cam mechanism is a cylindrical cam mechanism 410, 420, which is a type of three-dimensional cam mechanism. In this embodiment, the cylindrical cam mechanisms 410, 420 include two cylindrical cam mechanisms: a first cylindrical cam mechanism 410 and a second cylindrical cam mechanism 420 (see Figures 8 and 12). 【0069】 (3-3-1) Connection part The transmission mechanism 402 may have only one connection part, as described below, but here, as shown in Figure 7, it has multiple connection parts 460a and 460b. In particular, in this embodiment, the transmission mechanism 402 has two connection parts 460a and 460b. Here, the two connection parts 460a and 460b have similar structures, so only connection part 460a will be described, and the description of connection part 460b will be omitted. Note that if you read the letter "a" used in the reference numerals below as "b", the description will refer to connection part 460b. 【0070】 An anvil 320 is attached to the connection part 460a. The connection part 460a supports the attached anvil 320. The transmission mechanism 402 moves the anvil 320 by ultimately moving the connection part 460a with the force of motors 470 and 480. 【0071】 The specific structure of the connection part 460a will be explained mainly with reference to Figures 7, 9, and 11. 【0072】 The connecting portion 460a includes a pin 461a (see Figure 9). One end of the pin 461a (referred to as the first end 462a) is inserted into a cylindrical recess 324 formed on the side of the anvil 320 opposite to the first surface 322 (the radially outer surface of the rotating body 210 of the anvil 320) (see Figure 9). The other end of the pin 461a (referred to as the second end) is connected to a buffer mechanism 469a located on the support portion 465 that supports the pin 461a. 【0073】 The shock absorption mechanism 469a is a mechanism that mitigates the impact when the anvil 320 moves to the second position Po2 and the anvil 320 and the horn 310 come into contact via a plurality of continuous sheets 3a, 4a (laminated sheet-like material). Here, the shock absorption mechanism 469a is a fluid pressure damper. In particular, here the shock absorption mechanism 469a is an air damper. The second end of the pin 461a is connected directly or indirectly via other members to a piston located in the cylinder of the air damper, which is the shock absorption mechanism 469a. High-pressure air can be supplied to the space in the cylinder on the side opposite to the side connected to the pin 461a of the air damper (hereinafter referred to as the first space). Preferably, the pressure in the first space is adjustable. 【0074】 As shown in Figure 9, the first end 462a of the pin 461a inserted into the recess 324 is curved (spherical), and the first end 462a of the pin 461a and the bottom of the recess 324 make point contact. 【0075】 The reason for making the first end 462a of pin 461a spherical and making point contact with the flat bottom of recess 324 is to allow the anvil 320 to swing. In other words, by making the first end 462a of pin 461a spherical and making point contact with the planar bottom of recess 324, the connecting portion 460a can support the anvil 320 in a swingable manner. In this way, by allowing the connecting portion 460a to support the anvil 320 in a swingable manner, the anvil 320 can follow even if the thickness of the continuous sheets 3a and 4a differs locally, and the continuous sheets 3a and 4a are more likely to be sandwiched evenly between the first surface 322 of the anvil 320 and the second surface 312 of the horn 310. As a result, even if the thickness of the continuous sheets 3a and 4a differs locally, proper sealing of the continuous sheets 3a and 4a is more easily achieved. 【0076】 In addition to the above configuration, a structure for pivotably supporting the anvil 320 may also be formed as shown in Figure 10, where the entire tip of the pin 461a is spherical, and a recess 324 with a spherical bottom is formed on the surface of the anvil 320 opposite to the first surface 322. 【0077】 Next, the reason why pin 461a is connected to the air damper rather than being completely fixed is as follows: 【0078】 If pin 461a is completely fixed, anvil 320 moves to the second position Po2, and an impact may occur when horn 310 and anvil 320 sandwich the continuous sheets 3a and 4a (horn 310 and anvil 320 come into contact via continuous sheets 3a and 4a). This impact can be mitigated by connecting pin 461a to a piston that can move within the cylinder of the shock absorption mechanism 469a. 【0079】 Preferably, the cushioning performance of the cushioning mechanism 469a can be adjusted by changing the pressure of the high-pressure air supplied to the first space. By adjusting the cushioning performance of the cushioning mechanism 469a, it is possible to adjust how much force the horn 310 and anvil 320 apply to clamp the continuous sheets 3a and 4a, and thereby adjust the sealing strength of the side seal portion 5. Specifically, increasing the pressure in the first space increases the sealing strength of the side seal portion 5, and decreasing the pressure in the first space decreases the sealing strength of the side seal portion 5. 【0080】 The air pressure in the first space is set by the worker and may remain unchanged while the sheet bonding device 200 is in operation. Alternatively, the air pressure in the first space may be automatically adjusted (changed) by the control device 600 in a manner described later. 【0081】 In this example, high-pressure air is supplied to the first space. However, the invention is not limited to this, and a fluid other than air (e.g., oil) may be sealed in the first space. However, from the viewpoint of ease of handling, it is preferable to use air as the fluid in the fluid pressure damper. 【0082】 In this embodiment, as described above, the mechanical drive mechanism 400 has two connecting parts 460a and 460b of similar structure. Here, the connecting parts 460a and 460b are arranged side by side along the longitudinal direction of the anvil 320, which is the axial direction of the rotating body 210. By providing multiple connecting parts 460a and 460b in this way, the force with which the first surface 322 of the anvil 320 and the second surface 312 of the horn 310 grip the continuous sheets 3a and 4a tends to be more constant regardless of location than if there were only one connecting part. 【0083】 Preferably, the air pressure supplied to the first space of the buffer mechanism 469a of the connecting portion 460a and the air pressure supplied to the first space of the buffer mechanism 469b of the connecting portion 460b can be adjusted independently. With this configuration, for example, if the sealing strength of the side seal portion 5 becomes uneven when the air pressure supplied to the first space of the buffer mechanism 469a and the air pressure supplied to the first space of the buffer mechanism 469b are the same, the sealing strength of the side seal portion 5 can be made uniform by independently adjusting the air pressure of the first space of the buffer mechanism 469a and the first space of the buffer mechanism 469b. Also, for example, even if the specifications of the diaper 1 include uneven thickness of the continuous sheets 3a and 4a in the vertical direction X2, the sealing strength of the side seal portion 5 can be made uniform by independently adjusting the air pressure of the first space of the buffer mechanism 469a and the first space of the buffer mechanism 469b. 【0084】 In this explanation, we have described an example using fluid pressure dampers as the buffering mechanisms 469a and 469b, but the buffering mechanisms 469a and 469b may also be mechanisms that utilize elastic members such as springs. 【0085】 (3-3-2) shaft One end of the shaft 458 is connected to the support portion 465. The shaft 458 is connected to the belt transmission mechanism 450, and when the toothed pulley 454 of the belt transmission mechanism 450 (described later) rotates, the position of the end of the shaft 458 connected to the support portion 465 changes in the radial direction of the rotating body 210. As a result, the positions of the connecting portions 460a and 460b supported by the support portion 465, and the anvils 320 connected to the connecting portions 460a and 460b, change in the radial direction of the rotating body 210. 【0086】 (3-3-3) Belt transmission mechanism The belt transmission mechanism 450 is a mechanism that changes the position of the anvil 320 in the radial direction of the rotating body 210 by rotating the toothed pulley 454 to move the position of the tip of the shaft 458 up and down. 【0087】 The belt transmission mechanism 450 mainly includes a toothed belt 452 and two toothed pulleys 454 and 456 around which the toothed belt 452 is wound. A portion of the toothed belt 452 is fixed to the end of an arm 442 extending from the driven portion 440 of the second cylindrical cam mechanism 420, which will be described later. The type of belt used in the belt transmission mechanism 450 is just an example; other belt shapes (e.g., flat belt, V-belt) may be used. A chain transmission mechanism may also be used instead of the belt transmission mechanism 450. Furthermore, any power transmission mechanism other than a belt transmission mechanism may be used, as long as it can convert the movement of the driven portion 440 of the second cylindrical cam mechanism 420 into radial movement of the rotation axis 212 of the anvil 320. 【0088】 The belt transmission mechanism 450 rotates the toothed pulley 454 by having the driven part 430 of the first cylindrical cam mechanism 410 (described later) move the toothed pulleys 454 and 456 in the axial direction of the rotating body 210. The belt transmission mechanism 450 also rotates the toothed pulley 454 by having the driven part 440 of the second cylindrical cam mechanism 420 (described later) move the arm 442 in the axial direction of the rotating body 210. 【0089】 The principle by which toothed pulley 454 rotates when the driven part 430 of the first cylindrical cam mechanism 410 moves the toothed pulleys 454 and 456 in the axial direction of the rotating body 210 will be explained. Toothed pulleys 454 and 456 are attached to the driven part 430 of the first cylindrical cam mechanism 410, and when the driven part 430 moves in the axial direction of the rotating body 210, the toothed pulleys 454 and 456 also move in the axial direction of the rotating body 210 together with the driven part 430. However, an arm 442 is fixed to the toothed belt 452, and as will be described later, the driven part 440 of the second cylindrical cam mechanism 420, which is connected to the arm 442, does not move at the time the driven part 430 moves. Therefore, the position of the toothed belt 452 does not change at the time the toothed pulleys 454 and 456 move. As a result, toothed pulleys 454 and 456 will rotate to accommodate their movement. 【0090】 Next, the principle by which the second cylindrical cam mechanism 420 rotates the toothed pulley 454 will be explained. As will be described later, at the timing when the driven part 440 of the second cylindrical cam mechanism 420 moves the arm 442 in the axial direction of the rotating body 210, the first cylindrical cam mechanism 410 does not move the toothed pulleys 454 and 456 in the axial direction of the rotating body 210. Therefore, when the arm 442 moves in the axial direction of the rotating body 210, only the toothed belt 452 moves in the axial direction of the rotating body 210. As a result, the toothed pulleys 454 and 456 rotate to correspond to the movement of the toothed belt 452. 【0091】 (3-3-4) Cylindrical cam mechanism The first cylindrical cam mechanism 410 and the second cylindrical cam mechanism 420 will be described with reference to Figures 8, 12, and 14. In the following description, as shown in Figures 8, 12, and 14, movement to the left in the drawings will be referred to as "forward," and movement to the right in the drawings will be referred to as "backward." 【0092】 The first cylindrical cam mechanism 410 mainly includes a cylindrical cam 412 having a groove 414 formed around the circumference of its cylindrical surface, a contact 418 inserted into the groove 414 of the cylindrical cam 412 and moving along the groove 414, and a driven part 430 connected to the contact 418. The driven part 430 is a frame to which toothed pulleys 454 and 456 are attached. The driven part 430 also supports the anvil 320 via a shaft 458 connected to the toothed pulley 454. 【0093】 In this embodiment, the cylindrical cam 412 does not rotate, but the driven part 430 is driven and rotated by motors 470 and 480. At this time, the contact 418 connected to the driven part 430 moves along the groove 414 of the cylindrical cam 412. As shown in Figure 12, the groove 414 of the cylindrical cam 412 includes a portion that approaches the horn 310 and a portion that moves away from the horn 310 in the axial direction D2 of the rotating body 210, so the contact 418 and the driven part 430 connected thereto also move along the axial direction of the rotating body 210. 【0094】 As a result, when the driven part 430 approaches the horn 310 (when the driven part 430 moves forward), the first cylindrical cam mechanism 410 moves the anvil 320, which is located at the first position Po1 (see Figure 14(a)), in a second direction D2 parallel to the second surface 312 of the horn 310 in the axial direction of the rotating body 210, by the force of the motors 470 and 480, thereby moving the first surface 322 of the anvil 320 to the third position Po3 (see Figure 14(b)), which is opposite to the second surface 312 in the second direction D2. Also, when the driven part 430 moves away from the horn 310 (when the driven part 430 moves backward), the first cylindrical cam mechanism 410 moves the anvil 320, which is located at the third position Po3, back to the first position Po1. As described above, when the first cylindrical cam mechanism 410 moves the driven part 430, the pulley 454 rotates, causing the anvil 320 to move in the radial direction of the first direction D1, which is the radial direction of the rotating body 210. 【0095】 The second cylindrical cam mechanism 420 mainly includes a cylindrical cam 422 having a groove 424 formed around the circumference of its cylindrical surface, a contact 428 inserted into the groove 424 of the cylindrical cam 422 and moving along the groove 424, and a driven part 440 connected to the contact 428. The driven part 440 is a frame to which the arm 442 is attached. 【0096】 In this embodiment, the cylindrical cam 422 does not rotate, but the driven part 440 is driven and rotated by motors 470 and 480. At this time, the contact 428 connected to the driven part 440 moves along the groove 424 of the cylindrical cam 422. As shown in Figure 12, the groove 424 of the cylindrical cam 422 includes a portion that approaches the horn 310 and a portion that moves away from the horn 310 in the axial direction of the rotating body 210. Therefore, the contact 428, the driven part 440 connected thereto, and the arm 442 attached to the driven part 440 also move along the axial direction of the rotating body 210. 【0097】 As a result, when the driven part 440 moves away from the horn 310 (when the driven part 440 moves backward), the second cylindrical cam mechanism 420 moves the anvil 320, which the first cylindrical cam mechanism 410 has moved to the third position Po3, in the first direction D1, which is the radial direction of the arm 442 rotating body 210, by the force of motors 470 and 480, to the second position Po2. Conversely, when the driven part 440 approaches the horn 310 (when the driven part 440 moves forward), the second cylindrical cam mechanism 420 moves the anvil 320, which is located at the second position Po2, in the first direction D1, which is the radial direction of the arm 442 rotating body 210, by the force of motors 470 and 480, to the third position Po3. 【0098】 Here, we will explain with reference to the timing at which the first cylindrical cam mechanism 410 moves the driven part 430, the timing at which the second cylindrical cam mechanism 420 moves the driven part 440, and the shapes of grooves 414 and 424. 【0099】 As a premise for this explanation, it is assumed that the anvil 320 is initially located at the first position Po1 (see Figure 14(a)). 【0100】 As the rotating body 210 rotates (as the contacts 418 and 428 move downward in Figure 12), the first cylindrical cam mechanism 410 first begins to move the driven part 430 toward the horn 310 along the axial direction of the rotating body 210 (it begins to move forward). As a result, the anvil 320 moves toward the horn 310 along the axial direction of the rotating body 210 to the third position Po3. At the third position Po3, the second surface 312 of the horn 310 and the first surface 322 of the anvil 320 face each other. At this point, the forward movement of the driven part 430 by the first cylindrical cam mechanism 410 stops. Note that as the driven part 430 moves forward, the pulley 454 rotates, so the anvil 320 also moves slightly closer to the horn 310 in the radial direction of the rotating body 210 (see Figure 14(b)). 【0101】 As the rotating body 210 continues to rotate, the second cylindrical cam mechanism 420 begins to retract the driven part 430 in a direction away from the horn 310 along the axial direction of the rotating body 210. As a result, the anvil 320 approaches the horn 310 along the radial direction of the rotating body 210 and moves to the second position Po2 (see Figure 14(c)). At this point, the retraction of the driven part 440 by the second cylindrical cam mechanism 420 stops. 【0102】 As the rotating body 210 continues to rotate, the second cylindrical cam mechanism 420 begins to advance the driven part 430 toward the horn 310 along the axial direction of the rotating body 210. As a result, the anvil 320 moves away from the horn 310 along the radial direction of the rotating body 210 to the third position Po3 (see Figure 14(b)). At this point, the advancement of the driven part 440 by the second cylindrical cam mechanism 420 stops. 【0103】 As the rotating body 210 continues to rotate, the first cylindrical cam mechanism 410 begins to retract the driven part 430 away from the horn 310 along the axial direction of the rotating body 210. As a result, the anvil 320 moves to the first position Po1 in the direction away from the horn 310 along the axial direction of the rotating body 210 (see Figure 14(a)). At this point, the retraction of the driven part 430 by the first cylindrical cam mechanism 410 stops. Note that as the driven part 430 retracts, the pulley 454 rotates, so the anvil 320 also moves away from the horn 310 in the radial direction of the rotating body 210 (see Figure 14(b)). 【0104】 (3-3-5) Cleaning mechanism A cleaning mechanism 490 is provided on the rear side of the horn 310. The cleaning mechanism 490 is a mechanism for removing dirt adhering to the first surface 322 of the anvil 320. 【0105】 The cleaning mechanism 490 mainly includes a rotating brush 492, an arm 494 to which the rotating brush 492 is attached at its tip, and a support part 496 that rotatably supports the arm. The support part 496 is provided with a leaf spring (not shown) which biases the rotating brush 492 radially outward relative to the rotating body 210. 【0106】 An anvil 320 has a plate attached to its rear end (not shown in the figure), and as the anvil 320 moves from the third position Po3 to the second position Po2, the rotating brush 492 is pushed downward by the plate. Then, as the anvil 320 moves from the second position Po2 to the first position Po1, the rotating brush 492 comes into contact with the first surface 322 of the anvil 320, removing dirt adhering to the first surface 322 of the anvil 320 and applying lubricating oil to the first surface 322 of the anvil 320. 【0107】 (3-4) Control device The control device 600 includes a CPU (not shown in the diagram), memory such as ROM and RAM, and input / output. The device includes various electrical and electronic components. The control device 600 may be a single device or may be composed of multiple devices. 【0108】 The control device 600 is connected to the transport device 500 and the motors 470 and 480. 【0109】 The control device 600 controls the operation (start / stop, speed adjustment) of the transport device 500 and the motors 470 and 480 by having the CPU execute a program stored in memory. 【0110】 Furthermore, the control device 600 may adjust the pressure of the air supplied from the high-pressure air supply device to the first space of the buffer mechanism 469a by controlling the opening degree of the first pneumatic control valve 467a, or adjust the pressure of the air supplied from the high-pressure air supply device to the first space of the buffer mechanism 469b by controlling the opening degree of the second pneumatic control valve 467b. By adjusting the pressure in the first space of the buffer mechanism 469a and the first space of the buffer mechanism 469b, the joint strength of the side seal portion 5 can be changed as described above. 【0111】 As an automatic control of the opening degree of the first pneumatic control valve 467a and the second pneumatic control valve 467b by the control device 600, for example, the following method may be used. 【0112】 In one example, the manufacturing apparatus 100 has a camera 610 located downstream of the sheet joining apparatus 200 that captures an image of the side seal portion 5. The control device 600 determines the joining strength of the side seal portion 5 from, for example, a change in color of the side seal portion 5. The control device 600 then adjusts the opening degrees of the first pneumatic control valve 467a and the second pneumatic control valve 467b (so that the joining strength of the side seal portion 5 is optimized) according to the joining strength of the joining mechanism 300 between the continuous sheet 3a and the continuous sheet 4a, as determined from the image of the camera 610. Preferably, the control device 600 adjusts the opening degrees of the first pneumatic control valve 467a and the second pneumatic control valve 467b independently. 【0113】 In another example, the manufacturing apparatus 100 has a temperature sensor 620 that detects the temperature of the horn 310 and the anvil 320. The control device 600 determines the bonding strength of the side seal portion 5 from the measurement value of the temperature sensor 620, for example. Generally, the greater the temperature rise, the greater the bonding strength, and the smaller the temperature rise, the smaller the bonding strength. The control device 600 then adjusts the opening degrees of the first pneumatic control valve 467a and the second pneumatic control valve 467b (so that the bonding strength of the side seal portion 5 is optimized) according to the bonding strength of the bonding mechanism 300 between the continuous sheet 3a and the continuous sheet 4a, as determined from the measurement value of the temperature sensor 620. Preferably, the control device 600 adjusts the opening degrees of the first pneumatic control valve 467a and the second pneumatic control valve 467b independently. 【0114】 In another example, the control device 600 may determine the bonding strength between the continuous sheet 3a and the continuous sheet 4a based on the time elapsed since the start of operation. Generally, as time passes after the start of operation, the horn 310 and the anvil 320 heat up, and the bonding strength increases. Therefore, the control device 600 may determine that the bonding strength between the continuous sheet 3a and the continuous sheet 4a has increased after a predetermined time has elapsed since the start of operation. The control device 600 adjusts the opening degrees of the first pneumatic control valve 467a and the second pneumatic control valve 467b (so that the sealing strength of the side seal portion 5 is optimized) according to the bonding strength of the bonding mechanism 300 between the continuous sheet 3a and the continuous sheet 4a determined from the time elapsed. Preferably, the control device 600 adjusts the opening degrees of the first pneumatic control valve 467a and the second pneumatic control valve 467b independently. 【0115】 (4) Features (4-1) The manufacturing apparatus 100 for wearable articles of this embodiment manufactures wearable articles having two or more sheet-like materials. The type of wearable article is not limited, but in this embodiment, the wearable article is a diaper 1. The manufacturing apparatus 100 for wearable articles comprises a conveying device 500 and a sheet joining device 200. The conveying device 500 conveys a laminated sheet-like material in which at least a continuous sheet 3a and a continuous sheet 4a are overlapped from two or more sheet-like materials. In other words, the conveying device 500 conveys the continuous sheet 3a and the continuous sheet 4a in an overlapping state. The continuous sheet 3a and the continuous sheet 4a are examples of the first and second sheet-like materials. The sheet joining device 200 joins the sheet-like materials of the laminated sheet-like material conveyed by the conveying device 500 (in this case, the continuous sheet 3a and the continuous sheet 4a) to each other. The sheet joining device 200 comprises a rotating body 210, a joining mechanism 300, and a mechanical drive mechanism 400. The rotating body 210 is rotationally driven. The bonding mechanism 300 is attached to the rotating body 210. The bonding mechanism 300 includes an anvil 320 and a horn 310. The bonding mechanism 300 ultrasonically bonds a laminated sheet-like material, which is conveyed along the circumferential direction of the rotating body 210, by sandwiching it between the first surface 322 of the anvil 320 and the second surface 312 of the horn 310. The mechanical drive mechanism 400 moves the anvil 320 between a first position Po1 and a second position Po2. At the first position Po1, the first surface 322 and the second surface 312 of the anvil 320 are separated in a first direction D1 perpendicular to the second surface 312 of the horn 310. In the second position Po2, the first surface 322 and the second surface 312 of the anvil 320 are in close proximity in the first direction D1, and the first surface 322 sandwiches the laminated sheet-like material between itself and the second surface 312. The mechanical drive mechanism 400 includes motors 470 and 480, and a transmission mechanism 402 that converts the force of the motors 470 and 480 into the movement of the anvil 320. 【0116】 In the manufacturing apparatus 100 for wearable articles of this embodiment, unlike the case where the first surface 322 moves along the second surface 312 in close proximity to the second surface 312 in the first direction D1, it is possible to suppress the occurrence of abnormal wear of the anvil 320 and horn 310. 【0117】 Furthermore, in the manufacturing apparatus 100 for wearable articles of this embodiment, unlike the case where the first surface 322 of the anvil 320 reciprocates along the second surface 312 of the horn 310, problems caused by overlapping ultrasonic bonding are less likely to occur. 【0118】 Furthermore, in the manufacturing apparatus 100 for wearable articles of this embodiment, the anvil 320 is operated by a mechanical drive mechanism 400 that converts the power of motors 470 and 480 into the movement of the anvil 320. Therefore, the reproducibility of the movement of the anvil 320 is higher compared to the case where the anvil 320 is moved by fluid pressure. As a result, in the manufacturing apparatus 100 for wearable articles of the first aspect, it is easier to obtain a seal with the desired appearance and strength. 【0119】 (4-2) In the manufacturing apparatus 100 for wearable articles of this embodiment, the transmission mechanism 402 includes a cam mechanism. 【0120】 In the manufacturing apparatus 100 for wearable articles of this embodiment, a cam mechanism is used to operate the anvil 320 with high precision. 【0121】 (4-3) In the manufacturing apparatus 100 for wearable articles of this embodiment, the motors 470 and 480 of the mechanical drive mechanism 400 rotate the rotating body 210. The cam mechanism is a cylindrical cam mechanism 410 and 420. 【0122】 In the manufacturing apparatus 100 of the wearable article of this embodiment, by using cylindrical cam mechanisms 410 and 420, which are a type of three-dimensional cam mechanism, the highly precise operation of the anvil 320 can be achieved in a relatively small device. 【0123】 (4-4) The manufacturing apparatus 100 for wearable articles of this embodiment includes cylindrical cam mechanisms 410 and 420, which comprise a first cylindrical cam mechanism 410 and a second cylindrical cam mechanism 420. The first cylindrical cam mechanism 410 moves an anvil 320, positioned at a first position Po1, in a second direction D2 by the force of motors 470 and 480, moving the first surface 322 to a position opposite the second surface 312 in the second direction D2. The second direction D2 is the axial direction of the rotating body 210 and parallel to the second surface 312. The second cylindrical cam mechanism 420 moves the anvil 320, which has been moved by the first cylindrical cam mechanism 410, in a first direction D1, which is the radial direction of the rotating body 210, by the force of motors 470 and 480, moving it to a second position Po2. 【0124】 In the manufacturing apparatus 100 for wearable articles of this embodiment, the anvil 320 is operated by two cam mechanisms 410 and 420, thereby suppressing the occurrence of contact between the anvil 320 and the horn 310 when the anvil 320 is moved in a second direction D2 parallel to the second surface 312. 【0125】 Let me explain in detail. For example, suppose the manufacturing equipment moves the anvil 320 directly from the first position Po1 to the second position Po2 using only the first cylindrical cam mechanism 410. In this case, the anvil 320 moves radially along the rotating body 210 while moving axially along the rotating body 210. As a result, the seal pattern on the first surface 322 of the anvil 320 may get caught on the continuous sheets 3a and 4a, and a part of the horn 310 may not be covered by the continuous sheets 3a and 4a. 【0126】 In contrast, in this embodiment, at the timing when the continuous sheets 3a and 4a are sandwiched between the anvil 320 and the horn 310, the second cylindrical cam mechanism 420 moves the anvil 320 only in the radial direction of the rotating body 210, so such a situation is unlikely to occur. 【0127】 (4-5) In the manufacturing apparatus 100 for wearable articles of this embodiment, the first cylindrical cam mechanism 410 moves the anvil 320 in the radial direction of the rotating body 210 by the force of motors 470 and 480. 【0128】 In the manufacturing apparatus 100 for wearable articles of this embodiment, the first cylindrical cam mechanism 410 moves the anvil 320 not only in the axial direction of the rotating body 210 but also in the radial direction of the rotating body 210, so it is possible to move the anvil 320 from the first position Po1 to the second position Po2 in a relatively short time, which is efficient. 【0129】 (4-6) In the manufacturing apparatus 100 for wearable articles of this embodiment, the transmission mechanism 402 includes connection parts 460a and 460b with respect to the anvil 320. The connection parts 460a and 460b are provided with cushioning mechanisms 469a and 469b that mitigate the impact when the anvil 320 moves to a second position Po2 and the anvil 320 and the horn 310 come into contact via a laminated sheet-like material. 【0130】 In the manufacturing apparatus 100 for wearable articles of this embodiment, the impact of contact between the anvil 320 and the horn 310 is easily suppressed. Furthermore, in the manufacturing apparatus 100 for wearable articles of this embodiment, the cushioning mechanisms 469a and 469b are more likely to suppress uneven contact between the first surface 322 of the anvil 320 and the second surface 312 of the horn 310. 【0131】 (4-7) The garment manufacturing apparatus 100 of this embodiment is a garment manufacturing apparatus 100 of the sixth aspect, and the cushioning mechanisms 469a and 469b are fluid pressure dampers. 【0132】 While there is no limitation on the type of fluid, it is preferable that the fluid used in the fluid pressure damper be air. In other words, it is preferable that the cushioning mechanisms 469a and 469b utilize air pressure to mitigate the impact when the anvil 320 and the horn 310 come into contact via multiple sheets. 【0133】 In the manufacturing apparatus 100 for wearable articles of this embodiment, the impact of contact between the anvil 320 and the horn 310 is easily suppressed. 【0134】 (4-8) In the manufacturing apparatus 100 for wearable articles of this embodiment, the fluid pressure damper has adjustable cushioning performance. 【0135】 The manufacturing apparatus 100 for wearable articles of this embodiment can achieve the desired sealing performance by clamping the anvil 320 and the horn 310 with appropriate force. 【0136】 (4-9) In the manufacturing apparatus 100 for wearable articles of this embodiment, the cushioning mechanisms 469a and 469b include a plurality of fluid pressure dampers whose cushioning performance can be independently adjusted. 【0137】 In the manufacturing apparatus 100 for wearable articles of this embodiment, uneven contact between the first surface 322 of the anvil 320 and the second surface 312 of the horn 310 is particularly easily suppressed. 【0138】 (4-10) The manufacturing apparatus 100 for wearable articles of this embodiment includes a control device 600. The control device 600 adjusts the cushioning performance of the cushioning mechanisms 469a and 469b according to the bonding strength of the bonding mechanism 300 between the continuous sheet 3a and the continuous sheet 4a. 【0139】 The manufacturing apparatus 100 for wearable articles of this embodiment can achieve the desired sealing performance. 【0140】 (4-11) In the manufacturing apparatus 100 for wearable articles of this embodiment, the connecting parts 460a and 460b pivotably support the anvil 320. 【0141】 With this configuration, uneven contact between the first surface 322 of the anvil 320 and the second surface 312 of the horn 310 is easily suppressed in the manufacturing apparatus 100 of the wearable article of this embodiment. 【0142】 <Addendum> Finally, the technical concepts that can be understood from the above embodiments are added below. 【0143】 A manufacturing apparatus for wearable articles according to a first aspect of the present invention manufactures a wearable article having two or more sheet-like materials. The manufacturing apparatus for wearable articles comprises a conveying device and a sheet joining device. The conveying device conveys a laminated sheet-like material in which at least a first sheet-like material and a second sheet-like material are overlapped from the two or more sheet-like materials. The sheet joining device joins the sheet-like materials of the laminated sheet-like material conveyed by the conveying device to each other. The sheet joining device comprises a rotating body, a joining mechanism, and a mechanical drive mechanism. The rotating body is rotationally driven. The joining mechanism is attached to the rotating body. The joining mechanism comprises a first joining member and a second joining member. The joining mechanism ultrasonically joins the laminated sheet-like material, which is conveyed along the circumferential direction of the rotating body, by sandwiching it between the first surface of the first joining member and the second surface of the second joining member. The mechanical drive mechanism moves the first joining member between a first position and a second position. In the first position, the first and second surfaces of the first joining member are separated in a first direction perpendicular to the second surface of the second joining member. In the second position, the first and second surfaces of the first joining member are close together in the first direction, and the first surface sandwiches the laminated sheet-like material between itself and the second surface. The mechanical drive mechanism includes a motor and a transmission mechanism that converts the force of the motor into the movement of the first joining member. 【0144】 In the manufacturing apparatus for wearable articles described in the first viewpoint, unlike the case where the first surface moves along the second surface in close proximity to the second surface in the first direction, it is possible to suppress the occurrence of abnormal wear of the first and second joining members. 【0145】 Furthermore, in the manufacturing apparatus for wearable items described in the first perspective, unlike the case where the first surface of the first joining member reciprocates along the second surface of the second joining member, problems caused by overlapping ultrasonic bonding are less likely to occur. 【0146】 Furthermore, in the manufacturing apparatus for wearable articles described in the first perspective, the first joining member is operated by a mechanical drive mechanism that converts the power of a motor into the movement of the first joining member. Therefore, the reproducibility of the movement of the first joining member is higher compared to cases where the first joining member is moved by fluid pressure. As a result, the manufacturing apparatus for wearable articles described in the first perspective makes it easier to obtain seals with the desired appearance and strength. 【0147】 A manufacturing apparatus for wearable articles according to a second aspect of the present invention is a manufacturing apparatus for wearable articles according to a first aspect, wherein the transmission mechanism includes a cam mechanism. 【0148】 In the manufacturing apparatus for wearable items from the second perspective, a cam mechanism can be used to operate the first joining member with high precision. 【0149】 A manufacturing apparatus for wearable articles according to a third aspect of the present invention is a manufacturing apparatus for wearable articles according to a second aspect, wherein the motor rotates a rotating body. The cam mechanism is a cylindrical cam mechanism. 【0150】 In the third aspect of the manufacturing apparatus for wearable items, a cylindrical cam mechanism, which is a type of three-dimensional cam mechanism, can be used to achieve highly precise operation of the first joining member in a relatively small device. 【0151】 A manufacturing apparatus for wearable articles according to a fourth aspect of the present invention is a manufacturing apparatus for wearable articles according to a third aspect, wherein the cylindrical cam mechanism includes a first cylindrical cam mechanism and a second cylindrical cam mechanism, the first cylindrical cam mechanism moves a first joining member, which is positioned at a first position, in a second direction by the force of a motor, and moves the first surface to a position facing the second surface in the second direction. The second direction is the axial direction of the rotating body and is parallel to the second surface. The second cylindrical cam mechanism moves the first joining member, which has been moved by the first cylindrical cam mechanism, in a first direction which is the radial direction of the rotating body by the force of a motor, and moves it to the second position. 【0152】 In the manufacturing apparatus for wearable items of the fourth perspective, by operating the first joining member with two cam mechanisms, it is possible to suppress the occurrence of contact between the first joining member and the second joining member when the first joining member is moved in a second direction parallel to the second surface. 【0153】 A manufacturing apparatus for wearable articles according to the fifth aspect of the present invention is a manufacturing apparatus for wearable articles according to the fourth aspect, wherein the first cylindrical cam mechanism also moves the first joining member in the radial direction of the rotating body by the force of the motor. 【0154】 In the manufacturing apparatus for wearable items described in the fifth perspective, the first cylindrical cam mechanism moves the first joining member not only in the axial direction of the rotating body but also in the radial direction of the rotating body, making it possible to move the first joining member from the first position to the second position in a relatively short time, thus being efficient. 【0155】 A manufacturing apparatus for wearable articles according to the sixth aspect of the present invention is a manufacturing apparatus for wearable articles according to any of the first or fifth aspects, wherein the transmission mechanism includes a connection portion with a first joining member. The connection portion is provided with a buffering mechanism that mitigates the impact when the first joining member moves to a second position and the first joining member and the second joining member come into contact via a laminated sheet-like material. 【0156】 In the manufacturing apparatus for wearable articles described in the sixth perspective, the impact of contact between the first joining member and the second joining member is easily suppressed. Furthermore, in the manufacturing apparatus for wearable articles described in the sixth perspective, the cushioning mechanism is easily suppressed, which helps to prevent uneven contact between the first surface of the first joining member and the second surface of the second joining member. 【0157】 A manufacturing apparatus for wearable articles according to the seventh aspect of the present invention is a manufacturing apparatus for wearable articles according to the sixth aspect, wherein the buffering mechanism is a fluid pressure damper. 【0158】 In the manufacturing apparatus for wearable items described in the seventh perspective, the impact of contact between the first joining member and the second joining member is easily suppressed. 【0159】 The manufacturing apparatus for wearable articles according to the eighth aspect of the present invention is the manufacturing apparatus for wearable articles according to the seventh aspect, wherein the fluid pressure damper has adjustable cushioning performance. 【0160】 In the manufacturing apparatus for wearable articles described in the eighth perspective, the desired sealing performance can be achieved by clamping the first joining member and the second joining member with appropriate force. 【0161】 A manufacturing apparatus for wearable articles according to the ninth aspect of the present invention is a manufacturing apparatus for wearable articles according to the seventh or eighth aspect, wherein the cushioning mechanism includes a plurality of fluid pressure dampers whose cushioning performance can be independently adjusted. 【0162】 In the manufacturing apparatus for wearable articles described in the ninth aspect, uneven contact between the first surface of the first joining member and the second surface of the second joining member is particularly easily suppressed. 【0163】 A manufacturing apparatus for wearable articles according to the tenth aspect of the present invention is a manufacturing apparatus for wearable articles according to the eighth or ninth aspect, further comprising a control device. The control device adjusts the cushioning performance according to the bonding strength of the bonding mechanism of the laminated sheet-like material. 【0164】 In the manufacturing apparatus for wearable articles described in the tenth perspective, the desired sealing performance can be achieved. 【0165】 A manufacturing apparatus for wearable articles according to the 11th aspect of the present invention is a manufacturing apparatus for wearable articles according to the 6th or 10th aspect, wherein the connecting portion pivotably supports the first joining member. 【0166】 In the manufacturing apparatus for wearable articles described in the 11th perspective, uneven contact between the first surface of the first joining member and the second surface of the second joining member is easily suppressed. [Explanation of Symbols] 【0167】 1. Diapers (items worn) S1a Inner sheet strip S2a Outer sheet strip 3a Continuous sheet (first sheet-like material, second sheet-like material) 4a Continuous sheet (second sheet-like material, first sheet-like material) 100 Manufacturing equipment 200 Sheet Bonding Machine 210 Rotating Bodies 300 Joining mechanism 310 Horn (Second connecting member, First connecting member) 312 2nd page 320 Anvil (First connecting member, Second connecting member) 322 Page 1 400 Mechanical drive mechanism 402 Transmission Mechanism 410 First cylindrical cam mechanism (cam mechanism, cylindrical cam mechanism) 420 Second cylindrical cam mechanism (cam mechanism, cylindrical cam mechanism) 460a, 460b connection section 465 Support part 470,480 motors 500 Conveyor System 600 Control Unit D1 1st direction D2 2nd direction Po1 1st position Po2 2nd position

Claims

[Claim 1] A manufacturing apparatus for wearable articles having two or more sheet-like materials, A conveying device for conveying a laminated sheet-like material in which at least a first sheet-like material and a second sheet-like material are stacked on top of each other, among the two or more sheet-like materials mentioned above. A sheet joining device that joins the laminated sheet-like materials conveyed by the conveying device to each other, Equipped with, The aforementioned sheet bonding device is A rotating body that is driven to rotate, A bonding mechanism is attached to the rotating body and has a first bonding member and a second bonding member, which ultrasonically bonds the laminated sheet-like material, which is conveyed along the circumferential direction of the rotating body, by sandwiching it between the first surface of the first bonding member and the second surface of the second bonding member. A mechanical drive mechanism moves the first joining member between a first position in which the first surface and the second surface are separated in a first direction perpendicular to the second surface of the second joining member, and a second position in which the first surface and the second surface are close together in the first direction, and the first surface sandwiches the laminated sheet-like material between itself and the second surface. It has, The mechanical drive mechanism includes a motor and a transmission mechanism that converts the power of the motor into the operation of the first connecting member. A manufacturing apparatus for wearable items. [Claim 2] The transmission mechanism includes a cam mechanism, The apparatus for manufacturing wearable articles as described in claim 1. [Claim 3] The motor rotates the rotating body, The cam mechanism is a cylindrical cam mechanism. The apparatus for manufacturing wearable articles according to claim 2. [Claim 4] The cylindrical cam mechanism is A first cylindrical cam mechanism moves the first joining member, which is positioned at the first position, in a second direction parallel to the second surface in the axial direction of the rotating body by the force of the motor, and moves the first surface to a position facing the second surface in the second direction; A second cylindrical cam mechanism moves the first joining member, which has been moved by the first cylindrical cam mechanism, to the second position by the force of the motor in the first direction which is the radial direction of the rotating body, including, The apparatus for manufacturing wearable articles according to claim 3. [Claim 5] The first cylindrical cam mechanism moves the first joining member in the radial direction by the force of the motor. The apparatus for manufacturing wearable articles according to claim 4. [Claim 6] The transmission mechanism includes a connection portion with the first joining member, The connecting portion is provided with a buffering mechanism to mitigate the impact when the first joining member moves to the second position and the first joining member and the second joining member come into contact via the laminated sheet-like material. The apparatus for manufacturing wearable articles as described in claim 1. [Claim 7] The aforementioned buffering mechanism is a fluid pressure damper. The apparatus for manufacturing wearable articles according to claim 6. [Claim 8] The aforementioned fluid pressure damper has adjustable cushioning performance. The apparatus for manufacturing wearable articles according to claim 7. [Claim 9] The cushioning mechanism includes a plurality of fluid pressure dampers whose cushioning performance can be independently adjusted. The apparatus for manufacturing wearable articles according to claim 7. [Claim 10] The system further includes a control device that adjusts the cushioning performance according to the bonding strength of the laminated sheet-like material by the bonding mechanism. The apparatus for manufacturing wearable articles according to claim 8 or 9. [Claim 11] The connecting portion supports the first joining member so that it can swing, The apparatus for manufacturing wearable articles according to claim 6.

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