Connecting device

Abstract

To provide a joint device for joining together short workpieces that cannot be arranged so as to span over a plurality of rollers.SOLUTION: A joint device includes: a first roller 12 for rotating an attracted first workpiece 18 in a transport direction and transporting the first workpiece 18; and a second roller 14 for rotating an attracted second workpiece 22 in the transport direction and joining the second workpiece 22 to the transported first workpiece 18 by heating. The second roller 14 includes: a main body drum; a plurality of protrusions 32 provided at intervals in a rotational direction of the main body drum; and a plurality of suction parts provided on each protrusions 32 to suck the second workpiece 22 onto an end surface of the protrusions 32.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a joining device that joins a first workpiece and a second workpiece. [Background technology]

[0002] In recent years, research and development into fuel cells has been conducted to contribute to energy efficiency, ensuring that more people have access to affordable, reliable, sustainable and advanced energy.

[0003] Patent Document 1 listed below discloses a manufacturing device for a membrane electrode assembly (MEA). In this control device, an electrolyte membrane sheet and a catalyst electrode layer sheet are conveyed across multiple rollers. The electrolyte membrane sheet and the catalyst electrode layer sheet are overlapped by a pair of rollers arranged midway through the conveyance, and then bonded by applying heat and pressure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-004393 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the manufacturing device of Patent Document 1 cannot join short workpieces that cannot be placed across multiple rollers.

[0006] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]

[0007] An aspect of the present invention is a joining device that joins a first sheet-like workpiece and a second sheet-like workpiece, comprising: a first roller that adsorbs the first workpiece onto its outer peripheral surface and rotates the adsorbed first workpiece in a transport direction to transport the first workpiece; a second roller that adsorbs the second workpiece onto its outer peripheral surface and rotates the adsorbed second workpiece in the transport direction to heat and join the second workpiece to the first workpiece transported by the first roller; and a heater that is provided on at least one of the first roller and the second roller and generates the heat required for the joining, wherein the second roller comprises a rotatably supported main drum, a plurality of protrusions that are provided at intervals in the rotation direction of the main drum and protrude from the outer peripheral surface of the main drum in a radial direction of the main drum, and a plurality of suction portions that are provided on each of the protrusions and that adsorb the second workpiece onto an end face of the protrusion. [Effects of the Invention]

[0008] According to this aspect of the present invention, it is possible to join short workpieces that cannot be placed across multiple rollers. In addition, because the first and second workpieces are joined while being attracted to each other, it is possible to prevent the first and second workpieces from shifting, deforming, or being over-pressurized. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a joining device. [Figure 2] FIG. 2 is a schematic diagram showing a case where the assembly is a resin-framed membrane electrode assembly. [Figure 3] FIG. 3 is an external view of the second roller. [Figure 4] FIG. 4 is an exploded view of the second roller. [Figure 5] FIG. 5 is a cross-sectional view showing a part of the main drum. [Figure 6] FIG. 6 is a front view of the recessed portion of the first roller. [Figure 7] FIG. 7 is an enlarged view showing a part of the second roller. [Figure 8]FIG. 8 is an enlarged view showing a part of the first roller. [Figure 9] FIG. 9 is a diagram showing the configuration of a control system that controls the rotation speeds of the first roller and the second roller. [Figure 10] FIG. 10 is a graph showing the relationship between the radius to the joining portion where the second workpiece is joined to the first workpiece and the speed. DETAILED DESCRIPTION OF THE INVENTION

[0010] 1 is a diagram showing a joining device 10. The joining device 10 has a first roller 12 and a second roller 14.

[0011] The first roller 12 is configured to be able to adsorb the first workpiece 18 supplied from the first workpiece supply roller 16 onto the outer circumferential surface of the first roller 12. The first roller 12 rotates the first workpiece 18 adsorbed onto the outer circumferential surface of the first roller 12 in the conveying direction to convey the first workpiece 18. The first workpiece 18 is shorter than the roller circumferential length of the first roller 12, and cannot be positioned so as to span between the first roller 12 and the second roller 14. The roller circumferential length is the length in the rotational direction of the roller circumferential surface.

[0012] In this embodiment, the first roller 12 has a plurality of recesses 20 for accommodating the first workpiece 18. The recesses 20 are formed on the outer peripheral surface of the first roller 12 at intervals in the rotation direction of the first roller 12. In this case, the first roller 12 adsorbs the first workpiece 18 into the recesses 20.

[0013] The first workpiece 18 is conveyed while being attracted by the first roller 12 and passes between the first roller 12 and the second roller 14 .

[0014] The second roller 14 is configured to be able to adsorb the second workpiece 22 supplied from the second workpiece supply roller 21 onto its outer circumferential surface. The second roller 14 rotates the second workpiece 22 adsorbed onto its outer circumferential surface in the conveying direction, and heats and joins the second workpiece 22 to the first workpiece 18 conveyed by the first roller 12. The second workpiece 22 has a circumferential length shorter than that of the second roller 14, and cannot be positioned so as to span between the first roller 12 and the second roller 14.

[0015] The first workpiece 18 to which the second workpiece 22 has been joined is transported while being attracted to the first roller 12. Thereafter, before reaching the first workpiece supply roller 16, the first workpiece 18 to which the second workpiece 22 has been joined is removed from the first roller 12 by a robot or the like.

[0016] In this way, the joining device 10 joins short workpieces that cannot be placed across multiple rollers. Furthermore, the joining device 10 joins the first workpiece 18 and the second workpiece 22 while they are held in suction, thereby preventing the first workpiece 18 and the second workpiece 22 from shifting, deforming, or being over-pressurized.

[0017] In this embodiment, the joining device 10 further includes a resin frame supply roller 24. The resin frame supply roller 24 supplies a resin frame 26 toward the movement path of the first workpiece 18 from the first workpiece supply roller 16 to the second roller 14. The resin frame 26 is a frame member made of resin and has an opening. The opening of the resin frame 26 is smaller than the opening of the recess 20.

[0018] The first roller 12 adsorbs the resin frame 26 supplied by the resin frame supply roller 24 onto the outer peripheral surface of the first roller 12 in a state in which the inner edge of the resin frame 26 overlaps the peripheral edge of the first workpiece 18. In this case, the second roller 14 joins the second workpiece 22 to the inner edge of the resin frame 26 and the first workpiece 18. This joining results in a joined body 28 of the first workpiece 18, the second workpiece 22, and the resin frame 26.

[0019] The assembly 28 may be a resin-framed membrane electrode assembly used in a power generation cell of a fuel cell. Figure 2 is a schematic diagram showing the assembly 28 as a resin-framed membrane electrode assembly.

[0020] When the assembly 28 is a resin-framed membrane electrode structure, the first workpiece 18 is a first electrode catalyst layer used in a power generation cell. The first electrode catalyst layer is a porous sheet member formed by bonding an anode electrode layer (or cathode electrode layer) and a catalyst layer. On the other hand, the second workpiece 22 is a porous sheet member formed by bonding a second electrode catalyst layer 22A used in the power generation cell and an electrolyte membrane 22B used in the power generation cell. The electrolyte membrane 22B is smaller than the second electrode catalyst layer 22A, and the second electrode catalyst layer 22A protrudes from the periphery of the electrolyte membrane 22B. The inner edge of the resin frame 26 is disposed in this protruding portion. The resin frame 26 is non-porous. The inner edge of the resin frame 26 is sandwiched between the second electrode catalyst layer 22A and the first electrode catalyst layer. In this state, the first electrode catalyst layer, the second electrode catalyst layer 22A, and the resin frame 26 are bonded to one another, and an assembly 28 is obtained.

[0021] The first workpiece 18 may be a sheet member formed by joining the second electrode catalyst layer 22A and the electrolyte membrane 22B used in the power generation cell together. In this case, the second workpiece 22 is the first electrode catalyst layer.

[0022] Fig. 3 is an external view of the second roller 14. Fig. 4 is an exploded view of the second roller 14. Fig. 5 is a cross-sectional view showing a portion of the main drum 30. The second roller 14 has the main drum 30, a protruding portion 32, and a manifold portion 34.

[0023] The main drum 30 is a rotating body. The main drum 30 has a thermal conductivity higher than that of air and is formed in a generally cylindrical shape. A shaft 36 is fixed to the main drum 30. The main drum 30 is rotatably supported by the shaft 36.

[0024] The main drum 30 has suction channels 38 (see FIGS. 4 and 5). The suction channels 38 are channels for sucking air and are formed inside the main drum 30. The suction channels 38 include a main channel 40 and branch channels 42 (see FIG. 5). The main channels 40 are arranged at intervals in the circumferential direction of the main drum 30. Each main channel 40 extends along the rotation axis of the main drum 30 and opens at the end face of the main drum 30 facing the manifold section 34. The branch channels 42 are arranged at intervals in the rotation axis direction of the main drum 30. Each branch channel 42 branches off from the main channel 40, extends radially of the main drum 30, and opens at the outer peripheral surface of the main drum 30.

[0025] The main drum 30 has a heater 44 (see FIGS. 4 and 5). The heater 44 is installed inside the main drum 30. In this embodiment, the heater 44 is arranged inside the multiple main flow paths 40. The heater 44 may be oil-based or electric. There may be one or more heaters 44. When there are multiple heaters 44, the heaters 44 are arranged at intervals in the circumferential direction of the main drum 30. Note that FIG. 4 shows an example in which there are multiple heaters 44. The heater 44 generates heat required for joining and heats the second workpiece 22 via the main drum 30. In this case, the resin frame 26 and the first workpiece 18 are heated via the second workpiece 22, and the first workpiece 18, the second workpiece 22, and the resin frame 26 are joined to each other.

[0026] The protrusions 32 are provided at intervals in the rotation direction of the main drum 30. Each protrusion 32 protrudes radially from the outer circumferential surface of the main drum 30. The protrusions 32 may be molded integrally with the main drum 30, or may be attached to the main drum 30 by an attachment member. The protrusions 32 have the same thermal conductivity as the main drum 30 or a thermal conductivity greater than that of the main drum 30.

[0027] Each protrusion 32 has a plurality of suction portions 46. The plurality of suction portions 46 are spaces for sucking the second workpiece 22 onto the end face of the protrusion 32, and are drilled in the protrusion 32. Each suction portion 46 communicates with a plurality of branch channels 42. A porous member 47 is housed within the suction portion 46.

[0028] The manifold portion 34 is attached to one end of the main drum 30. The manifold portion 34 is formed by joining a first plate 48 and a second plate 50. The first plate 48 and the second plate 50 may be molded integrally. The manifold portion 34 is formed, for example, in an annular shape.

[0029] The first plate 48 has a through hole 52 connected to a suction pipe of a suction pump. The second plate 50 has an arc-shaped notch 54. The through hole 52 communicates with the notch 54. The notch 54 communicates with some of the multiple main flow paths 40 that are arranged at intervals around the circumferential direction of the main drum 30. Some of the multiple main flow paths 40 are main flow paths 40 that are arranged in the suction-permitted range. The suction-permitted range is a range of an obtuse angle α centered on the axis AX (FIG. 1) of the main drum 30, and corresponds to the movement path of the second workpiece 22 transported by the second roller 14.

[0030] The manifold portion 34 is rotatably attached to the main drum 30, and the above-mentioned suction permitted range can be changed in the circumferential direction (rotational direction) of the main drum 30.

[0031] The manifold portion 34 connects the main flow path 40, which is located in the suction-permitted range, to the suction pump via the through-holes 52 and the notches 54. In this case, the manifold portion 34 causes the suction pump to suck the second workpiece 22, which is in contact with the end surface of the protruding portion 32, from the suction portion 46, which communicates with the main flow path 40 connected to the suction pump via the branch flow paths 42, and adsorbs the second workpiece 22 to the end surface of the protruding portion 32.

[0032] The first roller 12 has the same configuration as the second roller 14, except for the protrusion 32 of the second roller 14. In the case of the first roller 12, the protrusion 32 is replaced by the recess 20 (FIG. 1). FIG. 6 is a front view of the recess 20 of the first roller 12.

[0033] In the case of the first roller 12, some of the multiple tributary channels 42 open at the bottom surface of the recess 20. The manifold unit 34 causes the suction pump to suck the first workpiece 18 that is in contact with the bottom surface of the recess 20 through the tributary channels 42 that communicate with the main channel 40 that is connected to the suction pump, and adsorbs the first workpiece 18 into the recess 20.

[0034] In this embodiment, in order to adsorb the resin frame 26, other parts of the multiple tributary channels 42 open on the outer peripheral surface of the roller around each recess 20. The manifold section 34 causes the suction pump to suck the resin frame 26 abutting against the periphery of the recess 20 through the tributary channels 42 that communicate with the main channel 40 connected to the suction pump, and adsorbs the resin frame 26 to the outer peripheral surface of the roller around the recess 20.

[0035] In this embodiment, the number of openings of the tributary channels 42 per predetermined area on the bottom surface of the recess 20 is larger than the number of openings of the tributary channels 42 per predetermined area on the outer peripheral surface of the roller surrounding the recess 20. Therefore, the suction force acting on the bottom surface of the recess 20 can be made larger than the suction force acting on the outer peripheral surface of the roller surrounding the recess 20. As a result, even if the first workpiece 18 is porous, it can be adsorbed to the frame 26 in the same manner as a non-porous resin frame 26.

[0036] In the case of the first roller 12, the main flow path 40, which communicates with the notches 54 of the manifold portion 34, is disposed within a range of an obtuse angle α (suction permitted range) centered on the axis AX (FIG. 1) of the main drum 30. This range corresponds to the movement path of the first workpiece 18 conveyed by the first roller 12. In the case of the first roller 12, the heater 44 may be removed. In addition, if the heater 44 of the first roller 12 is not removed, the heater 44 of the second roller 14 may be removed.

[0037] 7 is an enlarged view showing a portion of the second roller 14. FIG. 8 is an enlarged view showing a portion of the first roller 12. In this embodiment, the radius of curvature CR1 of the end face of the protrusion 32 of the second roller 14 is smaller than the radius of curvature CR3 of the adsorption surface (bottom surface of the recess 20) to which the first workpiece 18 is adsorbed on the first roller 12. This makes it possible to suppress the occurrence of a difference in shrinkage due to natural cooling between the first workpiece 18 being transported in an adsorbed state and the second workpiece 22 being joined to the first workpiece 18 and transported in an unadsorbed state. As a result, it is possible to suppress warping of the joined body 28 toward the first roller 12 compared to when the radius of curvature CR1 of the end face of the protrusion 32 and the radius of curvature CR3 of the adsorption surface are the same.

[0038] Furthermore, in this embodiment, the radius of curvature CR1 of the end face of the protrusion 32 is smaller than the radius of curvature CR2 of the outer circumferential surface of the main drum 30 other than the protrusion 32. This allows the radius of curvature CR1 of the end face of the protrusion 32 to be smaller than the radius of curvature CR3 of the attraction surface of the first roller 12, without having to reduce the size of the entire second roller 14. As a result, it is possible to prevent the number of second workpieces 22 that can be attracted to the second roller 14 from decreasing.

[0039] In addition, in this embodiment, the radius of curvature CR3 of the attraction surface of the first roller 12 is larger than the radius of curvature CR4 of the outer peripheral surface of the first roller 12 other than the attraction surface. This makes it possible to make the radius of curvature CR1 of the end surface of the protrusion 32 smaller than the radius of curvature CR3 of the attraction surface of the first roller 12 without reducing the size of the entire first roller 12. As a result, it is possible to prevent the number of first workpieces 18 that can be attracted to the first roller 12 from decreasing.

[0040] If the radius of curvature CR1 of the end face of the protrusion 32 of the second roller 14 differs from the radius of curvature CR3 of the suction surface of the first roller 12, a difference in the movement speed between the first workpiece 18 and the second workpiece 22 may occur at the joint portion where the first workpiece 18 and the second workpiece 22 are joined. Therefore, in this embodiment, the relative rotational speed of the second roller 14 with respect to the rotational speed of the first roller 12 is adjusted.

[0041] 9 is a diagram showing the configuration of a control system that controls the rotation speeds of the first roller 12 and the second roller 14. The joining device 10 has a speed adjustment unit 56, a first motor 60, and a second motor 62.

[0042] The speed adjustment unit 56 has a processor such as a CPU or a GPU, and a storage medium 58. The storage medium 58 includes a volatile memory such as a RAM, and a non-volatile memory such as a ROM, a flash memory, or a hard disk. The speed adjustment unit 56 may be realized by a processor processing a program stored in the storage medium 58. The speed adjustment unit 56 may also be realized by an integrated circuit such as an ASIC or an FPGA. The speed adjustment unit 56 may also be configured by an electronic circuit including discrete devices.

[0043] The speed adjusting unit 56 controls a first motor 60 that drives the first roller 12 to rotate, thereby adjusting the rotation speed of the first roller 12. The speed adjusting unit 56 also controls a second motor 62 that drives the second roller 14 to rotate, thereby adjusting the rotation speed of the second roller 14.

[0044] FIG. 10 is a graph showing the relationship between the radius to the joint portion where the first workpiece 18 and the second workpiece 22 are joined and the speed. A table showing the relationship in which the speed increases as the radius to the joint portion increases is stored in the storage medium 58. The speed adjustment unit 56 adjusts the relative speed of the rotational speed of the second roller 14 with respect to the rotational speed of the first roller 12 based on the table stored in the storage medium 58. In this case, the speed adjustment unit 56 adjusts the relative speed so that the difference in movement speed between the first workpiece 18 and the second workpiece 22 is reduced at the joint portion where the first workpiece 18 and the second workpiece 22 are joined. For example, the speed adjustment unit 56 slows the rotational speed of the first roller 12 at the joint portion compared to the rotational speed of the first roller 12 at the non-joined portion. Furthermore, the speed adjustment unit 56 speeds the rotational speed of the second roller 14 at the joint portion compared to the rotational speed of the second roller 14 at the non-joined portion.

[0045] By adjusting the relative speed in this manner, it is possible to suppress the application of shear force between the first workpiece 18 and the second workpiece 22, thereby reducing deformation of the first workpiece 18 or the second workpiece 22.

[0046] [The present invention] The present invention is not limited to the above-described embodiment and modifications, and various configurations can be adopted without departing from the spirit of the present invention. The invention and effects that can be understood from the above description will be described below.

[0047] (1) The present invention provides a joining device (10) for joining a sheet-like first workpiece (18) and a sheet-like second workpiece (22), comprising: a first roller (12) for adsorbing the first workpiece to the outer peripheral surface of the roller and rotating the adsorbed first workpiece in a conveying direction to convey the first workpiece; a second roller (14) for adsorbing the second workpiece to the outer peripheral surface of the roller and rotating the adsorbed second workpiece in the conveying direction to heat and join the second workpiece to the first workpiece conveyed by the first roller; and a heater (44) provided on at least one of the first roller and the second roller to generate heat required for the joining. The second roller comprises a rotatably supported main drum (30), a plurality of protrusions (32) provided at intervals in the rotation direction of the main drum and protruding from the outer peripheral surface of the main drum in a radial direction of the main drum, and a plurality of suction portions (46) provided on each of the protrusions for adsorbing the second workpiece to an end face of the protrusion.

[0048] This allows short workpieces that cannot be placed across multiple rollers to be joined together. Also, because the first and second workpieces are joined while being attracted to each other, it is possible to prevent misalignment, deformation, and excessive pressure of the first and second workpieces.

[0049] (2) The present invention is a joining device, wherein the first roller transports the first workpiece to which the second workpiece has been joined, and the radius of curvature (CR1) of the end face of the protrusion may be smaller than the radius of curvature (CR3) of the suction surface of the first roller to which the first workpiece is suctioned. This makes it possible to prevent a difference in shrinkage due to natural cooling between the first workpiece being transported in a suctioned state and the second workpiece being joined to the first workpiece and transported in a non-suctioned state. As a result, warping of the joined body toward the first roller can be prevented compared to when the radius of curvature of the end face of the protrusion and the radius of curvature of the suction surface are the same.

[0050] (3) In the joining device of the present invention, the radius of curvature of the suction surface may be larger than the radius of curvature (CR4) of the outer peripheral surface of the first roller other than the suction surface. This allows the radius of curvature of the end face of the protrusion to be smaller than the radius of curvature of the suction surface of the first roller without reducing the size of the entire first roller. As a result, it is possible to prevent a decrease in the number of first workpieces that can be attracted to the first roller.

[0051] (4) In the joining device of the present invention, the radius of curvature of the end surface of the protrusion may be smaller than the radius of curvature (CR2) of the outer peripheral surface of the second roller other than the protrusion. This allows the radius of curvature of the end surface of the protrusion to be smaller than the radius of curvature of the attraction surface of the first roller without reducing the size of the entire second roller. As a result, it is possible to prevent a decrease in the number of second workpieces that can be attracted to the second roller.

[0052] (5) The present invention may be a joining device including a speed adjusting unit (56) that adjusts the relative rotational speed of the second roller with respect to the rotational speed of the first roller so that the difference in movement speed between the first workpiece and the second workpiece becomes small at the joining portion where the second workpiece is joined to the first workpiece. This makes it possible to suppress the application of force in the shear direction between the first workpiece and the second workpiece, thereby reducing deformation of the first workpiece or the second workpiece.

[0053] (6) The present invention may be a joining device, wherein the outer peripheral surface of the first roller is formed with a plurality of recesses (20) spaced apart in the rotation direction of the first roller for accommodating the first workpiece, the first roller adsorbs the first workpiece into the recesses, and adsorbs the resin frame (26) supplied by a resin frame supply roller (24) to the outer peripheral surface of the first roller in a state in which the inner edge of the resin frame overlaps the periphery of the first workpiece, and the second roller joins the second workpiece to the inner edge of the resin frame and the first workpiece. This makes it possible to suppress deformation of the resin frame whose inner edge overlaps the periphery of the first workpiece.

[0054] (7) The present invention is a joining apparatus, wherein one of the first workpiece and the second workpiece is a first electrode catalyst layer used in a power generation cell, and the other of the first workpiece and the second workpiece is a sheet member to which a second electrode catalyst layer (22A) used in the power generation cell and an electrolyte membrane (22B) used in the power generation cell are joined, the electrolyte membrane being smaller than the second electrode catalyst layer, and the inner edge of the resin frame may be sandwiched between the second electrode catalyst layer around the electrolyte membrane and the first electrode catalyst layer. This allows for a resin-framed membrane electrode assembly to be obtained. [Explanation of symbols]

[0055] 10... Joining device 12... First roller 14...Second roller 18...First workpiece 20: Recess 22: Second workpiece 24... Resin frame supply roller 26... Resin frame 28... Joint body 30... Main drum 32...Protrusion 34...Manifold 38...Suction channel 40...Main channel 42...Branch 44...Heater 46...Suction part 56...Speed ​​adjustment part

Claims

1. A joining device that joins a sheet-like first workpiece and a sheet-like second workpiece, a first roller that adsorbs the first workpiece onto an outer peripheral surface of the roller and rotates the adsorbed first workpiece in a conveying direction to convey the first workpiece; a second roller that adsorbs the second workpiece onto an outer peripheral surface of the roller, rotates the adsorbed second workpiece in a conveyance direction, and heat-bonds the second workpiece to the first workpiece being conveyed by the first roller; a heater provided on at least one of the first roller and the second roller, which generates heat required for the joining; Equipped with The second roller is a rotatably supported main drum; a plurality of protrusions provided at intervals in a rotation direction of the main drum and protruding from an outer peripheral surface of the main drum in a radial direction of the main drum; a plurality of suction portions provided on each of the protruding portions, the suction portions being adapted to adsorb the second workpiece onto an end surface of the protruding portion; Equipped with the first roller conveys the first workpiece to which the second workpiece has been joined; A joining device, wherein the radius of curvature of the end surface of the protrusion is smaller than the radius of curvature of the suction surface of the first roller to which the first workpiece is suctioned.

2. The joining device according to claim 1, A joining device, wherein the radius of curvature of the suction surface is larger than the radius of curvature of the outer peripheral surface of the first roller other than the suction surface.

3. The joining device according to claim 1 or 2, A joining device, wherein the radius of curvature of the end face of the protrusion is smaller than the radius of curvature of the outer peripheral surface of the second roller other than the protrusion.

4. The joining device according to claim 2 or 3, a speed adjusting unit that adjusts the relative speed of the rotational speed of the second roller with respect to the rotational speed of the first roller so that a difference in movement speed between the first workpiece and the second workpiece becomes small at a joining portion where the second workpiece is joined to the first workpiece.

5. A joining device for joining a sheet-like first workpiece and a sheet-like second workpiece, a first roller that adsorbs the first workpiece onto an outer peripheral surface of the roller and rotates the adsorbed first workpiece in a conveying direction to convey the first workpiece; a second roller that adsorbs the second workpiece onto an outer peripheral surface of the roller, rotates the adsorbed second workpiece in a conveyance direction, and heat-bonds the second workpiece to the first workpiece being conveyed by the first roller; a heater provided on at least one of the first roller and the second roller, which generates heat required for the joining; Equipped with The second roller is a rotatably supported main drum; a plurality of protrusions provided at intervals in a rotation direction of the main drum and protruding from an outer peripheral surface of the main drum in a radial direction of the main drum; a plurality of suction portions provided on each of the protruding portions, the suction portions being adapted to adsorb the second workpiece onto an end surface of the protruding portion; Equipped with A plurality of recesses for accommodating the first workpiece are formed on the outer peripheral surface of the first roller at intervals in the rotation direction of the first roller, the first roller adsorbs the first workpiece into the recess, and adsorbs the resin frame to the outer peripheral surface of the first roller in a state in which an inner edge portion of the resin frame supplied by the resin frame supply roller overlaps a peripheral portion of the first workpiece; The second roller joins the second workpiece to the inner edge of the resin frame and the first workpiece.

6. The joining device according to claim 5, one of the first workpiece and the second workpiece is a first electrode catalyst layer used in a power generation cell; the other of the first workpiece and the second workpiece is a sheet member to which a second electrode catalyst layer used in the power generation cell and an electrolyte membrane used in the power generation cell are joined, the electrolyte membrane is smaller than the second electrode catalyst layer; an inner edge portion of the resin frame is sandwiched between the second electrode catalyst layer and the first electrode catalyst layer around the electrolyte membrane.

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