Jig, measuring method, and method for manufacturing laminate

Abstract

To provide a jig, a measuring method, and a method for manufacturing a laminate that can reduce measurement time for measuring the joining force between laminates.SOLUTION: A jig 10 according to the present disclosure comprises: a pair of grip parts 11, 12 that sandwich a laminate 50; and adsorption parts 13 that are provided on opposing surfaces of the pair of grip parts 11, 12 and adsorb both end faces in a lamination direction of the laminate. The pair of grip parts 11, 12 are brought relatively close to each other to sandwich the laminate 50, and the adsorption parts 13 are caused to adsorb on both end faces in the lamination direction of the laminate 50, while sucking in spaces SP1, SP2 formed in the pair of grip parts 11, 12. Subsequently, the pair of grip parts 11, 12 are moved relatively away from each other to measure the joining force between the laminates 50.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a jig, a measurement method, and a method for manufacturing a laminate.

Background Art

[0002] Patent Document 1 discloses a technique for forming a laminate by laminating steel plates having caulking portions on one surface and recessed portions on the other surface so that the caulking portions and the recessed portions alternate. In the laminate disclosed in Patent Document 1, the caulking portions provided on the steel plates are fitted and fastened to the recessed portions provided on the adjacent steel plates.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors have found the following problems. Generally, when measuring the bonding strength of a laminate, an adhesive tape is provided between the jig and the steel plate for fixing. However, this method has a problem that it takes a long time for the measurement time including the installation work of the adhesive tape and the post-treatment work after the measurement.

[0005] The present disclosure has been made in view of such circumstances, and provides a jig, a measurement method, and a method for manufacturing a laminate capable of shortening the measurement time for measuring the bonding strength between laminates.

Means for Solving the Problems

[0006] The jig according to the present disclosure is a pair of gripping portions for sandwiching the laminate, and a suction portion provided on the opposing surfaces of the pair of gripping portions for sucking both end faces of the laminate in the lamination direction. Bring the pair of gripping parts closer to each other to sandwich the laminate, While sucking the spaces formed in each of the pair of gripping parts, adsorb the adsorption part to both end faces of the laminate in the lamination direction of the laminate, Move the pair of gripping parts relatively apart and measure the bonding strength between the laminates.

[0007] In the jig according to the present disclosure, the adsorption part is adsorbed to both end faces of the laminate, and the bonding strength of the laminate is measured by moving the pair of gripping parts relatively apart. Therefore, the jig according to the present disclosure does not require much labor for work and can shorten the measurement time for measuring the bonding strength between the laminates.

[0008] The laminate is formed by laminating laminate plates and fastening adjacent laminate plates with caulking parts, and the adsorption part may be provided so as to adsorb the vicinity of the caulking part. With such a configuration, tensile stress is applied to the vicinity of the caulking part, and the bonding strength between the laminates can be accurately measured.

[0009] The adsorption part may be provided so as to adsorb at least one of both sides in the longitudinal direction of the caulking part and both sides in the short direction of the caulking part. Even with such a configuration, tensile stress is applied to the vicinity of the caulking part, and the bonding strength between the laminates can be accurately measured.

[0010] The measurement method according to the present disclosure includes the steps of bringing a pair of gripping parts closer to each other to sandwich a laminate, while sucking the spaces formed in each of the pair of gripping parts, adsorbing an adsorption part provided on the opposing surfaces of the pair of gripping parts to both end faces of the laminate in the lamination direction of the laminate, moving the pair of gripping parts relatively apart and measuring the bonding strength between the laminates, and comprises.

[0011] In the measurement method according to the present disclosure, the adsorption parts are adsorbed to both end faces of the laminate, and the bonding strength between the laminates is measured by relatively displacing a pair of gripping parts. Therefore, in the measurement method according to the present disclosure, the work is not time-consuming, and the measurement time for measuring the bonding strength between the laminates can be shortened.

[0012] The manufacturing method according to the present disclosure is a method for manufacturing a laminate, comprising a step of laminating laminate plates to form the laminate, a step of relatively approaching a pair of gripping parts to sandwich the laminate, a step of adsorbing the adsorption parts provided on the opposing surfaces of the pair of gripping parts to both end faces in the lamination direction of the laminate while sucking the spaces formed in each of the pair of gripping parts, and a step of relatively separating the pair of gripping parts to measure the bonding strength between the laminates.

[0013] In the manufacturing method of the laminate according to the present disclosure, the adsorption parts are adsorbed to both end faces of the laminate, and the bonding strength between the laminates is measured by relatively displacing a pair of gripping parts. Therefore, in the manufacturing method of the laminate according to the present disclosure, the work is not time-consuming, and the laminate can be manufactured while shortening the measurement time for measuring the bonding strength between the laminates.

Advantages of the Invention

[0014] According to the present disclosure, it is possible to provide a jig, a measurement method, and a manufacturing method of a laminate capable of shortening the measurement time for measuring the bonding strength between laminates.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0016] Hereinafter, the present disclosure will be described through embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. Also, not all of the configurations described in the embodiments are necessarily essential as means for solving the problems. For the sake of clarity of explanation, the following description and drawings have been appropriately omitted and simplified. In each drawing, the same elements are denoted by the same reference numerals, and duplicate explanations are omitted as necessary. Of course, the right-handed xyz orthogonal coordinates shown in the drawings are for convenience in explaining the positional relationship of the components. Usually, the positive direction of the z-axis is vertically upward, and the xy plane is the horizontal plane.

[0017] (Embodiment 1) <Laminate> First, the laminate will be described with reference to FIG. 1. FIG. 1 is a cross-sectional view of the laminate. As shown in FIG. 1, the laminate 50 is formed by laminating laminate plates 51. In the example shown in FIG. 1, the lamination direction is the z-axis direction. The laminate 50 shown in FIG. 1 laminates six laminate plates 51 in the lamination direction.

[0018] As shown in FIG. 1, the laminate plate 51 has a caulking portion 52 on one surface and a recess 53 on the other surface. The caulking portion 52 has a convex shape so as to be fitted into the recess 53. As shown in FIG. 1, in the laminate 50, the caulking portions 52 and the recesses 53 of the laminate plates 51 are laminated alternately in the lamination direction. In the laminate 50, the caulking portions 52 provided on the laminate plates are fitted into the recesses 53 provided on the adjacent laminate plates and fastened.

[0019] Of the laminated plates 51 located at both end faces of the laminate 50 in the lamination direction, the laminated plate 51 located on the positive z-axis side has a concave portion 53 on the side of a jig (not shown in FIG. 1) described later, and has a caulked portion 52 on the side of the adjacent laminated plate 51. Further, of the laminated plates 51 located at both end faces of the laminate 50 in the lamination direction, the laminated plate 51 located on the negative z-axis side has concave portions 53 on both sides. In this way, by making both sides of one of the laminated plates 51 located at both end faces of the laminate 50 in the lamination direction into concave portions 53, both end faces of the laminate 50 in the lamination direction become flat surfaces and can be sandwiched by a jig (not shown in FIG. 1) described later.

[0020] The caulked portion 52 shown in FIG. 1 is a dowel caulking having a convex shape, but is not limited thereto, and may be a caulking having a V shape (V-shaped caulking). Further, the laminate 50 is not limited to being formed by fastening adjacent laminated plates with a caulked portion, and may be formed by mechanical joining, for example, joining with a rivet.

[0021] Furthermore, the laminate 50 may be formed by joining adjacent laminated plates by welding, chemical joining, or pressure bonding. Chemical joining is, for example, welding. That is, the laminate 50 only needs to integrate the laminated plates 51 so that the joining of the laminated plates 51 does not come off. By integrating the laminated plates 51, the laminate 50 can, for example, suppress a decrease in the product function of the laminate 50 and improve the handling during manufacturing.

[0022] <Configuration of jig> Subsequently, with reference to FIG. 2, the jig according to Embodiment 1 will be described. FIG. 2 is a diagram showing the jig and the laminate according to Embodiment 1. The upper part of FIG. 2 is a cross-sectional view of the jig 10 and the laminate 50 according to Embodiment 1. The lower part of FIG. 2 is a diagram showing a state in which the suction portion 13 of the jig 10 is adsorbed to the laminate 50. In other words, the lower part of FIG. 2 is a view of the jig 10 and the laminate 50 shown in the upper part of FIG. 2 in the xy plane, and is a diagram in which the gripping portions 11 and 12 are omitted.

[0023] As shown in the upper part of FIG. 2, the jig 10 includes a gripping part 11, a gripping part 12, and a suction part 13. The gripping parts 11 and 12 will be described. As shown in the upper part of FIG. 2, the gripping parts 11 and 12 are a pair of gripping parts and are relatively displaceable in the stacking direction. As shown in the upper part of FIG. 2, by bringing the pair of gripping parts 11 and 12 closer to each other, the laminate 50 is sandwiched. Since the gripping part 11 and the gripping part 12 have the same configuration, the configuration of the gripping part 11 will be described below.

[0024] As shown in the upper part of FIG. 2, the gripping part 11 includes a pressing part 21, a cover 22, and a suction part 23. As shown in the upper part of FIG. 2, when the pair of gripping parts 11 and 12 are brought closer to each other to sandwich the laminate 50, the pressing part 21 abuts against and presses the upper end surface of the laminate 50.

[0025] As shown in the upper part of FIG. 2, the pressing part 21 has a concave part. The cover 22 is provided on the pressing part 21 so as to close the concave part of the pressing part 21. Thereby, a space SP1 and a space SP2 are formed between the pressing part 21 and the cover 22. The space SP1 and the space SP2 can also be said to be spaces formed in the gripping part 11. The pressing part 21 includes an O-ring 26 in order to ensure the airtightness of the space SP1 and the space SP2.

[0026] As shown in the upper part of FIG. 2, the suction part 23 is provided so as to penetrate the cover 22. As shown in the upper part of FIG. 2, one open end 24 of the suction part 23 is connected to a suction device (not shown in FIG. 2). The suction device is, for example, a vacuum pump. The other open end 25 of the suction part 23 is provided above the space SP1 and the space SP2. The suction part 23 is hollow from the open end 24 to the open end 25. That is, the suction part 23 can be said to be a hollow member.

[0027] Next, the suction part 13 will be described. As shown in the upper part of FIG. 2, the suction part 13 includes a communication part 31 and a suction pad 32. As shown in the upper part of FIG. 2, the suction pad 32 is provided on the surface where the holding part 11 and the holding part 12 face each other. The suction pad 32 can adsorb to both end faces of the laminate 50 in the lamination direction. The arrangement of the suction part 13 will be described later.

[0028] As shown in the upper part of FIG. 2, the communication part 31 is provided so as to penetrate the pressing part 21. As shown in the upper part of FIG. 2, one opening end 33 of the communication part 31 is connected to the suction pad 32. The other opening end 34 of the communication part 31 is provided in the lower part of the space SP1 and the space SP2. The communication part 31 is a cavity from the opening end 33 to the opening end 34. That is, the communication part 31 can be said to be a hollow member, and the lower space of the space SP1 and the suction pad 32 communicate. Similarly, the lower space of the space SP2 and the suction pad 32 communicate. The suction part 23 and the communication part 31 communicate from the suction device to the lower space of the suction pad 32 through the space SP1 and the space SP2.

[0029] Note that the protrusion of the suction pad 32 from the pressing part 21 is preferably provided so as to be the same as the lower end surface of the pressing part 21 when the suction pad 32 adsorbs to the laminate 50.

[0030] <Operation of the jig> Subsequently, the operation of the jig 10 according to Embodiment 1, that is, the measurement method will be described. FIG. 3 is a flowchart showing the measurement method according to Embodiment 1. In the measurement method according to Embodiment 1, by using the jig 10, the bonding strength of the laminate 50 shown in FIGS. 1 and 2 is measured. Hereinafter, the description will be made with appropriate reference to FIG. 2 as well. For each component member of the jig and the laminate, the reference numerals shown in FIGS. 1 and 2 are used.

[0031] First, the laminate 50 is provided between the holding part 11 and the holding part 12 (step ST1). As shown in FIG. 2, it is preferable to provide the laminate 50 so that the centers of the holding part 11 and the holding part 12 in the xy plane view overlap with the center of the laminate 50 in the xy plane view.

[0032] Next, by bringing the gripping portions 11 and 12 closer to each other relatively, the laminate 50 is sandwiched (step ST2). More specifically, as shown in the upper part of FIG. 2, by bringing the gripping portions 11 and 12 closer to each other relatively, the pressing portions 21 of the gripping portions 11 and 12 come into contact with both end faces of the laminate 50, and the laminate 50 is pressed. As a result, the gripping portions 11 and 12 can sandwich the laminate 50.

[0033] Also, after sandwiching the laminate 50, it is preferable to further bring the gripping portions 11 and 12 closer to each other relatively to compress and press the laminate 50. Thereby, the joining between the laminates 50 can be stabilized. For example, when the caulking portion 52 of the laminate 50 is about to come off, by compressing and pressing the laminate 50, the caulking portion 52 is pushed into the concave portion 53 and fitted, so that the fastening is stabilized.

[0034] Next, while sucking the spaces formed in the gripping portions 11 and 12 respectively, the suction portion 13 is suctioned to both end faces of the laminate 50 in the laminating direction (step ST3). The gripping portion 11 will be described as an example. As described above in the upper part of FIG. 2, a suction device is connected to the open end 24 of the suction portion 23. The open end 25 of the suction portion 23 is provided at the upper part of the space SP1. Since the suction portion 23 is a hollow member, when suction is performed in a state where the suction device is connected to the open end 24, the spaces SP1 and SP2 become negative pressure.

[0035] As described above in the upper part of FIG. 2, the open end 34 of the communication portion 31 is provided at the lower parts of the spaces SP1 and SP2. The open end 33 of the communication portion 31 is connected to the suction pad 32. As shown in the upper part of FIG. 2, since the suction portion 23 and the communication portion 31 communicate from the suction device through the spaces SP1 and SP2 to the lower space of the suction pad 32, as the spaces SP1 and SP2 become negative pressure, the suction pad 32 is suctioned to the upper end face of the laminate 50.

[0036] Since the holding part 12 has the same configuration, when the spaces formed in each of the holding parts 11 and 12 are suctioned, the suction part 13 can be suctioned to both end faces of the laminate 50 in the laminating direction.

[0037] Here, the timing of the compression pressurization of the laminate 50 described above will be explained. In the measurement method according to the first embodiment, typically, it is performed in the order of step ST2, compression pressurization of the laminate 50, and step ST3. However, it is not limited to this, and the compression pressurization of the laminate 50 may be performed while performing step ST3.

[0038] Next, the holding parts 11 and 12 are relatively moved apart to measure the joining force between the laminates 50 (step ST4). In step ST2, the suction part 13 is suctioned to both end faces of the laminate 50 in the laminating direction. Therefore, by relatively moving apart the holding parts 11 and 12, a force is applied in the direction of separating the joining of the laminates 50. That is, a tensile load is applied to the caulked part 52 of the laminate 50. The value of the tensile load when the fastening of the caulked part 52 is released indicates the joining force of the laminate 50. In step ST4, the suction device maintains the suction state so that the suction of the suction part 13 does not come off from both end faces of the laminate 50 in the laminating direction.

[0039] Next, the laminate 50 is removed from the holding parts 11 and 12 (step ST5). More specifically, the suction device is removed from the opening end 24 of the suction part 23, and the suction part 23 is opened to atmospheric pressure. As a result, since the pressure in the space SP1 becomes atmospheric pressure, the suction pad 32 suctioned to the laminate 50 can be easily removed.

[0040] <Arrangement of the suction part 13> Here, with reference to the lower part of FIG. 2, the arrangement of the suction part 13 will be described in detail. As shown in the lower part of FIG. 2, the suction part 13 is provided on both sides in the longitudinal direction of the caulked part 52 of the laminate 50. Thereby, when the holding part 11 and the holding part 12 are relatively moved apart, a tensile stress is applied to the vicinity of the caulked part 52, and the joining force between the laminates 50 can be accurately measured.

[0041] Further, the suction portion 13 is not limited to the example shown in FIG. 2, and may be provided to suction at least one of both sides in the longitudinal direction of the caulking portion 52 and both sides in the short-side direction of the caulking portion 52. Even with such a configuration, when the gripping portion 11 and the gripping portion 12 are relatively separated, tensile stress is applied to the vicinity of the caulking portion, and the bonding strength between the laminates 50 can be accurately measured.

[0042] Furthermore, the suction portion 13 is not limited to the above-described arrangement, and may be provided to suction the vicinity of the caulking portion 52. The vicinity includes directly above the caulking portion 52. With such a configuration, when the gripping portion 11 and the gripping portion 12 are relatively separated, tensile stress is applied to the vicinity of the caulking portion, and the bonding strength between the laminates 50 can be accurately measured. Also, by providing the suction portion 13 in the vicinity of the caulking portion 52, generation of a bending moment with respect to the caulking portion 52 can be suppressed.

[0043] In the case of V-shaped caulking, the laminated plate 51 is provided with a cut for forming a V shape. When a slight gap is formed between the laminated plates 51, air can flow from the cut to the gap, so there are cases where the suction pad 32 provided directly above the V-shaped caulking is difficult to suction to the upper end surface of the laminate 50. Therefore, when the suction pad 32 is provided directly above the V-shaped caulking, it is preferable to block the cut of the laminated plate 51 or compress and pressurize the laminate 50.

[0044] As shown in the lower part of FIG. 2, the suction portions 13 are preferably provided at equal intervals in the circumferential direction of the laminate 50. Thereby, when the gripping portion 11 and the gripping portion 12 are relatively separated, uniform tensile stress is applied to each caulking portion 52.

[0045] <Measurement method according to comparative example> Subsequently, the measurement method according to the comparative example will be described. For each component member of the jig and the laminate, the reference numerals shown in FIGS. 1 and 2 are used. In the measurement method according to the comparative example, steps ST2 and ST3 shown in FIG. 3 are different. The jig used in the measurement method according to the comparative example does not include the suction portion 23 and the suction portion 13 of the jig 10 shown in FIG. 2.

[0046] In the measurement method according to the comparative example, an adhesive tape is provided between the gripping portions 11 and 12 and the laminate 50, the gripping portions 11 and 12 are relatively brought closer to each other, and the laminate 50 is sandwiched therebetween (corresponding to step ST2 in FIG. 3). Then, the gripping portions 11 and 12 are relatively brought closer to each other, the laminate 50 is compressed and pressed, and the gripping portions 11 and 12 and the laminate 50 are adhered by the adhesive tape (corresponding to step ST3 in FIG. 3). That is, in the measurement method according to the comparative example, in order to measure the bonding strength of the laminate 50, an adhesive tape is provided and fixed between the jig and the laminate 50.

[0047] Hereinafter, while comparing the measurement method according to Embodiment 1 and the measurement method according to the comparative example, the measurement time, the reusability of the laminate, and the measurement accuracy of the measurement method according to Embodiment 1 will be described. Note that the reference numerals shown in FIGS. 1 and 2 are used for each component of the jig and the laminate.

[0048] <Measurement time> With reference to FIG. 4, the measurement time of the measurement method according to Embodiment 1 will be described. FIG. 4 is a diagram showing the measurement times of the measurement method according to Embodiment 1 and the measurement method according to the comparative example. The measurement time includes a preparation time, a measurement operation time, and a post-processing operation time.

[0049] As shown in FIG. 4, in the measurement method according to Embodiment 1, preparation T1, setting of the laminate T3, compression and pressing T4, measurement T5, and removal T6 are performed in order. The compression and pressing T4 indicates the time from when the gripping portions 11 and 12 start to be relatively brought closer to each other until the laminate 50 is compressed and pressed and the suction portion 13 is suctioned to both end faces of the laminate 50 in the laminating direction. The measurement T5 indicates the time when the gripping portions 11 and 12 are relatively moved apart from each other to measure the bonding strength between the laminates 50. The removal T6 indicates the time when the suction portion 13 is removed from both end faces of the laminate 50 in the laminating direction.

[0050] In the measurement method according to Embodiment 1, the measurement time is about 170 seconds. In the measurement method according to Embodiment 1, the preparation time is the time required for preparation T1 and the set T3 of the laminate. The measurement operation time is the time required for compression pressurization T4 and measurement T5. The post-treatment operation time is the time required for extraction T6.

[0051] On the other hand, as shown in FIG. 4, in the measurement method according to the comparative example, preparation T11, adhesive tape attachment T21, set T31 of the laminate, compression pressurization T41, measurement T51, and extraction T61 are performed in order. Compression pressurization T41 indicates the time from when the gripping portions 11 and 12 start approaching relatively until the laminate 50 is compression-pressurized and the adhesive tape is adhered to both end faces of the laminate 50 in the lamination direction. Measurement T51 indicates the time when the gripping portions 11 and 12 are moved relatively away from each other to measure the joining force between the laminates 50. Extraction T61 indicates the time for removing the laminate 50 from the gripping portions 11 and 12.

[0052] In the measurement method according to the comparative example, the measurement time is about 790 seconds. In the measurement method according to the comparative example, the preparation time is the time required for preparation T1, adhesive tape attachment T2, and set T3 of the laminate. The measurement operation time is the time required for compression pressurization T4 and measurement T5. The post-treatment operation time is the time required for extraction T6.

[0053] The measurement times of the measurement method according to Embodiment 1 and the measurement method according to the comparative example are compared. In the measurement method according to Embodiment 1, compared with the measurement method according to the comparative example, the preparation time for the adhesive tape attachment T21 is not required. This is because in the measurement method according to Embodiment 1, while sucking the spaces formed in each of the gripping portions 11 and 12, the suction portion 13 is sucked to both end faces of the laminate 50 in the lamination direction. Therefore, in the measurement method according to Embodiment 1, the preparation work is not laborious, and the preparation time for the adhesive tape attachment T21 can be reduced.

[0054] Also, in the measurement method according to Embodiment 1, the time for compression pressurization T4 is shorter than that in the measurement method according to the comparative example. In the measurement method according to the comparative example, compression pressurization is performed to stabilize the adhesion of the adhesive tape provided between the gripping portions 11 and 12 and the laminate 50, so it takes time for compression pressurization. On the other hand, in the measurement method according to Embodiment 1, compression pressurization is performed to stabilize the bonding between the laminates 50, so the time for compression pressurization can be reduced. Therefore, in the measurement method according to Embodiment 1, the measurement operation time can be shortened.

[0055] Furthermore, in the measurement method according to Embodiment 1, the post-treatment operation time for extraction T6 is shorter than that in the measurement method according to the comparative example. In the measurement method according to the comparative example, since the adhesive tape adheres strongly to both end faces of the laminate, it takes time and effort to peel it off. On the other hand, in the measurement method according to Embodiment 1, by removing the suction device from the suction portion 23 and opening the suction portion 23 to atmospheric pressure, the suction pad 32 adsorbed to the laminate 50 can be removed easily and without taking time. Therefore, in the measurement method according to Embodiment 1, the post-treatment operation is not troublesome and the post-treatment operation time can be shortened.

[0056] From the above, in the measurement method according to the comparative example, the measurement time is 790 seconds, while in the measurement method according to Embodiment 1, the measurement time is 170 seconds, which is not troublesome for the operation and can shorten the measurement time for measuring the bonding strength between the laminates.

[0057] Also, in the measurement method according to the comparative example, since the post-treatment operation time takes time, the measurement of the next laminate cannot be performed immediately. On the other hand, in the measurement method according to Embodiment 1, by shortening the post-treatment operation time, the measurement of the next laminate can be performed immediately.

[0058] <Reusability of the laminated board> Here, in the measurement method according to Embodiment 1, the laminated plate 51 can be reused. The measurement method according to Embodiment 1 and the measurement method according to the comparative example will be described by comparison. In the measurement method according to the comparative example, an adhesive tape is attached to both end faces (laminated plates 51) in the lamination direction of the laminate 50. In the measurement method according to the comparative example, in the post-treatment operation, the adhesive tape is peeled off from the laminated plate 51. The laminated plate 51 is typically in the shape of a thin plate. Therefore, when the adhesive tape is peeled off from the laminated plate 51, the laminated plate 51 may be deformed and discarded.

[0059] On the other hand, in the measurement method according to Embodiment 1, the suction pads 32 adsorbed to both end faces (laminated plates 51) in the lamination direction of the laminate 50 can be easily removed. As a result, since the laminated plate 51 is not deformed, the laminated plate 51 can be reused for the laminate 50.

[0060] In the measurement method according to the comparative example, since the laminated plate 51 may be deformed and discarded, 100% inspection of the laminate 50 could not be performed, and it was a spot check. On the other hand, in the measurement method according to Embodiment 1, since the laminated plate 51 can be reused for the laminate 50, 100% inspection of the laminate 50 can be performed. That is, in the measurement method according to Embodiment 1, the number of defective laminates 50 can be reduced.

[0061] <Measurement accuracy> With reference to FIG. 5, the measurement accuracy of the measurement method according to Embodiment 1 will be described. FIG. 5 is a diagram showing changes in the tensile load measured by the measurement method according to Embodiment 1 and the measurement method according to the comparative example.

[0062] The measurement method according to Embodiment 1 shown in FIG. 5 is the result of performing the measurement twice with the moving speed of the stroke being 2 mm / min and 6 mm / min respectively. In FIG. 5, the moving speed of the stroke in the measurement method according to Embodiment 1 is denoted as "suction 2 mm / min" and the like. The measurement method according to the comparative example shown in FIG. 5 is the result of performing the measurement twice with the moving speed of the stroke being 10 mm / min. In FIG. 5, the moving speed of the stroke in the measurement method according to the comparative example is denoted as "adhesion 10 mm / min" and the like. In FIG. 5, increasing the value of the stroke corresponds to relatively separating the pair of gripping portions. The tensile load indicates the load applied between the laminates.

[0063] As shown in FIG. 5, in the measurement method according to Embodiment 1 and the measurement method according to the comparative example, under any conditions, the tensile load increases as the value of the stroke increases, and reaches a maximum value at a predetermined value of the stroke. After the tensile load reaches the maximum value at a predetermined value of the stroke, it decreases as the value of the stroke increases. This maximum value of the tensile load indicates the bonding strength between the laminates.

[0064] In addition, in the measurement method according to the comparative example, the adhesive tape is installed so that the caulking portion 52 is covered, and a tensile load is applied to the caulking portion 52. On the other hand, in the measurement method according to Embodiment 1, the suction portion 13 is arranged in the vicinity of the caulking portion 52, and a tensile load is applied to the vicinity of the caulking portion 52. Therefore, as shown in FIG. 5, in the measurement method according to Embodiment 1, the value of the stroke at which the maximum value of the tensile load is obtained is larger than that in the measurement method according to the comparative example.

[0065] As shown in FIG. 5, in the measurement method according to Embodiment 1 and the measurement method according to the comparative example, under any conditions, the maximum value of the tensile load, that is, the bonding strength between the laminates, indicates about 150 N. From this, the measurement method according to Embodiment 1 has the same measurement accuracy as the measurement method according to the comparative example.

[0066] The size, number of the suction pads 32, and the suction speeds of the spaces SP1 and SP2 are set so as to provide a suction force equal to or greater than the joining force between the laminates. In the example shown in FIG. 5, the size, number of the suction pads 32, and the suction speed are set so as to provide a suction force of about 150 N or greater.

[0067] Thus, in the measurement method according to Embodiment 1, the suction part 13 is suctioned to both end faces of the laminate 50, and the joining force between the laminates 50 is measured by moving the pair of gripping parts 11 and 12 relatively apart from each other. Accordingly, in the measurement method according to Embodiment 1, the measurement time for measuring the joining force between the laminates can be shortened without much labor in the operation.

[0068] Further, in the method for manufacturing a laminate according to Embodiment 1, after laminating laminate plates to form a laminate, Steps ST1 to ST3 are executed as in FIG. 3. In the method for manufacturing a laminate according to Embodiment 1, the laminate can be manufactured while shortening the measurement time for measuring the joining force between the laminates without much labor in the operation.

[0069] Note that the present disclosure is not limited to the above-described embodiments, and can be appropriately modified without departing from the gist thereof.

Description of Reference Numerals

[0070] 10 jig 11, 12 gripping part 13 suction part 21 pressing part 22 cover 23 suction part 24, 25 open end 26 O-ring 31 communication part 32 suction pad 33, 34 open end 50 laminate 51 laminate plate 52 caulked part 53 recess

Claims

1. A pair of gripping portions for sandwiching a laminate, and a suction portion provided on opposing surfaces of the pair of gripping portions for sucking both end faces of the laminate in the lamination direction of the laminate. The pair of gripping portions are relatively brought closer to sandwich the laminate, while sucking the spaces formed in each of the pair of gripping portions, the suction portion is sucked against both end faces of the laminate in the lamination direction of the laminate, and the pair of gripping portions are relatively moved apart to measure the bonding force between the laminates. A jig.

2. The laminate is formed by laminating laminate plates and fastening adjacent laminate plates with caulking portions, and the suction portion is provided so as to suck the vicinity of the caulking portion. The jig according to claim 1.

3. The suction portion is provided so as to suck at least one of both sides in the longitudinal direction of the caulking portion and both sides in the short direction of the caulking portion. The jig according to claim 2.

4. A step of relatively bringing a pair of gripping portions closer to sandwich a laminate, a step of sucking the spaces formed in each of the pair of gripping portions and sucking a suction portion provided on opposing surfaces of the pair of gripping portions against both end faces of the laminate in the lamination direction of the laminate, and a step of relatively moving the pair of gripping portions apart to measure the bonding force between the laminates. A measuring method.

5. A method for manufacturing a laminate, comprising: a step of laminating laminate plates to form the laminate, a step of relatively bringing a pair of gripping portions closer to sandwich the laminate, While sucking the spaces formed in each of the pair of gripping portions, adsorbing the adsorption portions provided on the opposing surfaces of the pair of gripping portions to both end surfaces in the lamination direction of the laminate; Relatively separating the pair of gripping portions and measuring the bonding force between the laminates; Comprising: A method for manufacturing a laminate.

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