Ear bending jig and ear bending method

Abstract

To prevent deterioration of heat insulation performance of a vacuum heat insulation material.SOLUTION: An ear part folding jig 100 of the disclosure is a jig for folding an ear part, a part of an outer packing material protruding relative to a core material surface in a vacuum heat insulation material including the core material and the outer packing material covering the core material, in a manner that the ear part overlaps with the surface side of the vacuum heat insulation material. The ear part folding jig 100 includes: at least three or more revolving rollers 1337 which are pressed to the ear part to fold the ear part to the surface side of the vacuum heat insulation material along an outer edge part of the core material and are arranged spaced apart from each other; and a fixed roller 1426 which is pressed to portions of the ear part each of which is located between the revolving rollers 1337 and is not pressed by the revolving rollers 1337.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a lug bending jig, and How to fold the ears By law Regarding. [Background technology]

[0002] In many cases, vacuum insulation materials are installed inside the housings of products such as refrigerators and freezers to improve their thermal insulation performance. This vacuum insulation material comprises a core material that is an aggregate of inorganic fibers such as glass fiber or carbon fiber, and an outer packaging material with gas barrier properties. The core material is covered with the outer packaging material, and the interior of the outer packaging material is vacuum-sealed. When the interior of the outer packaging material is vacuum-sealed, ears are formed, which are parts of the outer packaging material that protrude beyond the surface of the core material.

[0003] When such vacuum insulation material is placed inside the housing of a product and filled with foam insulation material such as urethane, the ears hinder the flow of the foam insulation material when it is filled, resulting in areas inside the housing where the foam insulation material is not filled, or insulated wall layers with different filling specific gravities, resulting in a decrease in insulation performance.Patent Document 1 describes a vacuum insulation material that prevents a decrease in insulation performance due to flow obstruction when the foam insulation material is filled by folding the ears along the outer edge of the core material so that they overlap and adhere tightly to the surface of the vacuum insulation material, and by adhering the ears to the surface of the vacuum insulation material with an adhesive member between them. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-299906 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, if an elastic material such as glass wool is used as the core material of a vacuum insulation panel, the outer shape of the core material may deform into an arc when the interior of the outer packaging material is vacuum-sealed. Furthermore, because outer packaging materials are typically formed of a multi-layer laminate film including an aluminum-deposited layer to ensure gas barrier properties, the outer packaging material itself is rigid. Therefore, when attempting to fold the edge of the core material along the outer edge of the arc-shaped core material toward the surface of the vacuum insulation material, as described in Patent Document 1, large wrinkles may occur at the folded portion. Furthermore, if such large wrinkles are placed inside a product housing and foam insulation material is filled in, the wrinkles may hinder the flow of the foam insulation material or air may become trapped in the wrinkles, resulting in a decrease in the insulating performance of the vacuum insulation material.

[0006] The present disclosure has been made in consideration of such problems, and provides a lug bending jig that prevents a decrease in the thermal insulation performance of a vacuum insulation material; and How to fold the ears The law The purpose is to provide. [Means for solving the problem]

[0007] The ear bending jig of the present disclosure is for bending ears, which are portions of a vacuum insulation material that includes a core material and an outer packaging material that covers the core material, that protrude from the surface of the core material of the outer packaging material so that the ears overlap the surface of the vacuum insulation material. This ear bending jig includes at least three or more first rollers that are spaced apart from one another and that press against the ears to fold the ears along the outer edge of the core material toward the surface of the vacuum insulation material, and a second roller that is located between the first rollers and presses against any ears that are not pressed by the first rollers. [Effects of the Invention]

[0008] According to the present disclosure, wrinkles that occur when the ear portions are folded can be dispersed, thereby preventing a decrease in the insulating performance of the vacuum insulating material. [Brief explanation of the drawings]

[0009] [Figure 1A] Appearance of vacuum insulation material [Figure 1B] Cross section of the vacuum insulation material shown in Figure 1 along line II [Figure 2] 1 is a perspective view of a jig for bending an ear portion according to the first embodiment; [Figure 3] A perspective view of a rotating roller unit [Figure 4] Cross-sectional view of the rotating roller unit taken along line II-II in Figure 3 [Figure 5] Perspective view of the fixed roller unit [Figure 6] Cross-sectional view of the fixed roller unit taken along line III-III in Figure 5 [Figure 7] 1 is a cross-sectional view of a main part when the ear portion is being bent by the ear portion bending jig according to the first embodiment (part 1); [Figure 8] FIG. 1 is a diagram (part 1) illustrating the positional relationship between the swivel roller, the fixed roller, and the lug when the lug is being bent by the lug bending jig according to the first embodiment. [Figure 9] 1 is a cross-sectional view of a main part when the ear portion is being bent by the ear portion bending jig according to the first embodiment (part 2); [Figure 10] 10 is a cross-sectional view of a main part when the ears are being bent by the ear bending jig according to the first embodiment (part 3); [Figure 11] FIG. 2 is a diagram (part 2) illustrating the positional relationship between the swivel roller, the fixed roller, and the lug when the lug is being bent by the lug bending jig according to the first embodiment. [Figure 12] 4 is a cross-sectional view of a main part when the ears are being bent by the ear bending jig according to the first embodiment; [Figure 13] FIG. 3 is a diagram showing the positional relationship between the swivel roller, the fixed roller, and the lug when the lug is being bent by the lug bending jig according to the first embodiment (part 3). [Figure 14] 5 is a cross-sectional view of a main part when the ears are being bent by the ear bending jig according to the first embodiment; [Figure 15] FIG. 4 is a diagram showing the positional relationship between the swivel roller, the fixed roller, and the lug when the lug is being bent by the lug bending jig according to the first embodiment; [Figure 16] FIG. 1 is a diagram showing a vacuum heat insulating material whose ears have been bent by an ear bending jig according to the first embodiment; [Figure 17] 10 is a perspective view of a jig for bending ear portions according to a second embodiment; [Figure 18] FIG. 10 is a diagram showing the positional relationship between the turning roller, the fixed roller, the ear, and the camera when the ear is being bent by the ear bending jig according to the second embodiment. [Figure 19] Flowchart of rotation control process according to the second embodiment [Figure 20] FIG. 10 is a diagram illustrating a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes various embodiments of the edge bending jig for vacuum insulation panels according to the present disclosure. Note that the present disclosure is not limited to the various embodiments described below. Also, the size relationships between the components in the drawings may differ from the actual size relationships.

[0011] [Embodiment 1] An edge bending jig 100 for a vacuum insulation material 10 according to embodiment 1 will be described. First, the vacuum insulation material 10 to be bent with the edge bending jig 100 will be described. FIG. 1A is a view from above of the vacuum insulation material 10 before being bent with the edge bending jig. The surface shown in FIG. 1A is the front side of the vacuum insulation material 10. FIG. 1B is a cross-sectional view of the vacuum insulation material 10 shown in FIG. 1A taken along line I-I.

[0012] The vacuum insulation material 10 is a flat-plate insulation material disposed inside the housing of a refrigerator. The vacuum insulation material 10 includes a core material 11, which is an aggregate of glass wool, and an outer packaging material 12, which is a gasparilla-type laminate film covering the core material. The interior of the outer packaging material 12 is vacuum-sealed. When the interior of the outer packaging material 12 is vacuum-sealed, outer edge portions 13 on both sides of the core material 11 are deformed into arc shapes as shown in FIG. 1A, and ear portions 14 are formed where the outer packaging material 12 protrudes beyond the surface of the core material. The ear portion bending jig 100 according to the first embodiment is a device for bending the ear portions 14 of the vacuum insulation material 10 along the outer edge portions 13 of the core material 11 so as to overlap with the surface of the vacuum insulation material 10.

[0013] Next, the structure of the ear bending jig 100 according to the first embodiment will be described. FIG. 2 is a perspective view showing the appearance of the ear bending jig 100. For ease of understanding, the front-rear, left-right, top-bottom directions shown in FIG. 1 will also be referred to in other drawings as appropriate in the following description. The ear bending jig 100 is installed on a pair of guide rails 30 laid on the front and back of a stage 20, and includes a first gate unit 110 and a second gate unit 120 positioned immediately behind the first gate unit 110. In front of the ear bending jig 100, a rectangular parallelepiped positioning block 40 is fixed on the stage 20 at an angle parallel to the first gate unit 110 and the second gate unit 120.

[0014] The first gate unit 110 is a gate-shaped unit that includes two support pillars 111 and a beam 112 that spans between the two support pillars 111. A base 113 of each support pillar 111 of the first gate unit 110 is connected to a guide rail 30 that extends forward and backward and is movable along the guide rail 30. This allows the first gate unit 110 to move forward and backward along the guide rail 30. The first gate unit 110 supports three swivel roller units 130A, 130B, and 130C that are attached to the beam 112 at intervals. In the following description, when there is no need to distinguish between the three swivel roller units 130A, 130B, and 130C, they will also be referred to as swivel roller units 130.

[0015] Next, a detailed description will be given of the turning roller unit 130. Fig. 3 is a perspective view of the turning roller unit 130. Fig. 4 is a cross-sectional view of the turning roller unit 130 shown in Fig. 3 taken along line II-II.

[0016] The swivel roller unit 130 comprises a swivel roller unit base 131, a swivel roller spring base 132, a spring 1321, a linear bush 1322, a linear shaft 1323, a swivel roller base 133, a shaft holder 1331, a swivel roller shaft 1332, an angular bearing 1333, a swivel shaft 1334, a precision lock nut 1335, a set collar 1336, and a swivel roller 1337.

[0017] The swivel roller unit base 131 is fixed to the beam 112 of the first gate unit 110. A swivel roller spring base 132 is connected below the swivel roller unit base 131 via a spring 1321, a linear bushing 1322, and a linear shaft 1323 so that it can move up and down while receiving the elastic force of the spring 1321. A hole is formed in the center of the swivel roller spring base 132, into which a swivel shaft 1334 is fitted, and the swivel shaft 1334 is rotatably supported relative to the swivel roller spring base 132 by an angular bearing 1333, a precision lock nut 1335, and a set collar 1336. A swivel roller base 133 is connected to the lower end of the swivel shaft 1334. Shaft holders 1331 are attached to both ends of the swivel roller base 133, and the shaft holders 1331 lock the swivel roller shaft 1332. The turning roller 1337 is rotatably attached to the turning roller shaft 1332. With this configuration, the turning roller 1337 can change its position up and down while receiving the elastic force of the spring 1321, and can also rotate around the turning shaft 1334.

[0018] 2, the turning roller units 130A to 130C are fixed to the beam 112 at a distance from each other, so that the turning rollers 1337 of the turning roller units 130A to 130C are arranged in a straight line at a distance from each other. The turning rollers 1337 are an example of the first rollers of the present disclosure.

[0019] Next, the second gate unit 120 will be described. The second gate unit 120 is disposed immediately after the first gate unit 110 and is a gate-shaped unit including two support pillars 121 and a beam 122 spanning between the support pillars 121. The bases 123 of the support pillars 121 of the second gate unit 120 are connected to guide rails 30 extending in the front-rear direction so as to be movable along the guide rails 30. This allows the second gate unit 120 to move back and forth along the guide rails 30. The second gate unit 120 supports a fixed roller unit 140 attached to the beam 122.

[0020] Next, a description will be given of the fixed roller unit 140. Fig. 5 is a perspective view of the fixed roller unit 140. Fig. 6 is a cross-sectional view of the fixed roller unit 140 shown in Fig. 5 taken along line III-III.

[0021] The fixed roller unit 140 includes a fixed roller unit base 141 , a fixed roller spring base 142 , a spring 1421 , a linear bushing 1422 , a linear shaft 1423 , a shaft holder 1424 , a fixed roller shaft 1425 , and a fixed roller 1426 .

[0022] The fixed roller unit base 141 is fixed to the beam 122 of the second gate unit 120. A fixed roller spring base 142 is connected below the fixed roller unit base 141 via a spring 1421, a linear bushing 1422, and a linear shaft 1423 so as to be movable up and down while receiving the elastic force of the spring 1421. Shaft holders 1424 are attached to both ends of the fixed roller spring base 142, and the shaft holders 1424 lock the fixed roller shaft 1425. The fixed roller 1426 is rotatably attached to the fixed roller shaft 1425. With this configuration, the fixed roller 1426 can change its position up and down while receiving the elastic force of the spring 1421. The fixed roller 1426 is an example of a second roller of the present disclosure.

[0023] Next, a method for bending the edge 14 of the vacuum insulation material 10 using the edge bending jig 100 will be described. Figure 7 is a cross-sectional view of the essential parts of the vacuum insulation material 10 and the edge bending jig 100 when starting to fold the edge 14 using the edge bending jig 100. Figure 8 is a view from above of the swivel roller 1337, fixed roller 1426, and vacuum insulation material 10 at this time.

[0024] First, the ear part 14 of the vacuum insulation material 10 is pressed against the positioning block 40, and the ear part 14 is vertically raised as shown in FIG. 7. It is desirable that the thickness c of the positioning block 40 is larger than the height b of the ear part 14 before being vertically raised and smaller than the thickness a of the vacuum insulation material 10. That is, it is desirable that the relationship is "b < c < a". Also, in the initial state of the ear bending jig 100 where the elastic forces by the springs 1321 and 1421 before the start of bending are not generated, the heights L1 and L2 from the stage 20 to the turning roller 1337 and the fixed roller 1426 are adjusted in advance so as to be smaller than the thickness a of the vacuum insulation material 10.

[0025] Subsequently, in order for the surface of the vacuum insulation material 10 and the ear part 14 to be closely fixed when the ear part 14 is bent, hot melt 50 is applied to the surface side of the vacuum insulation material 10 in accordance with the bending length of the ear part 14. At this time, it is desirable to apply the hot melt 50 approximately 10 mm inside from the position P2 of the end of the ear part 14 after bending, inside the bending track P1 of the ear part 14. Thereby, it is possible to prevent the hot melt 50 from protruding from the position P2 of the end of the ear part 14 after bending to the surface of the vacuum insulation material 10. In the present disclosure, since it takes a relatively long time from the application of the hot melt 50 to the bending and adhesive fixing of the ear part 14 using the ear bending jig 100, it is desirable to use a hot melt 50 that is always sticky and open time-free.

[0026] After the vacuum insulation material 10 is prepared in this manner, the edge bending jig 100 is moved forward along the guide rail 30. As a result, first, as shown in FIG. 9, the turning roller 1337 comes into contact with the raised edge 14 at contact point P3, and bending of the edge 14 begins. Then, as the edge bending jig 100 moves further forward, the turning roller 1337 receives the downward elastic force of the spring 1321 and climbs onto the portion of the vacuum insulation material 10 where the core material 11 is located, and the contact point P3 with the edge 14 is positioned directly below the turning roller 1337, as shown in FIG. 10. At this time, the turning roller 1337 causes the edge 14 to be completely bent toward the surface of the vacuum insulation material 10.

[0027] 11 is a diagram showing the positional relationship between the swiveling rollers 1337 and the vacuum heat insulating material 10 in the state shown in FIG. 10. As described above, the outer edge 13 of the core material 11 of the vacuum heat insulating material 10 is deformed into an arc. Therefore, when the left and right swiveling rollers 1337 are pressed against the ears 14, uneven force is applied by the core material 11, causing the left and right swiveling rollers 1337 to rotate along the outer edge 13. Furthermore, because the swiveling rollers 1337 are arranged spaced apart from each other, two wrinkles 16 occur in the portions of the ears 14 between the swiveling rollers 1337 that are not pressed against, i.e., in the portion of the ear 14 between the left swiveling roller 1337 and the central swiveling roller 1337, and in the portion of the ear 14 between the central swiveling roller 1337 and the right swiveling roller. That is, in this embodiment, the wrinkles 16 that occur when at least the ear portions 14 are folded can be dispersed to at least two locations, thereby preventing the occurrence of large wrinkles.

[0028] Next, the edge bending jig 100 is moved further forward from the state shown in Figures 10 and 11. As a result, the turning roller 1337 passes while pressing against the edge 14 of the vacuum insulation material 10 due to the elastic force of the spring 1321. The edge bending jig 100 and the vacuum insulation material 10 then reach the state shown in Figures 12 and 13. As a result of the turning roller 1337 passing, the parts of the edge 14 other than the wrinkles 16 are tightly fixed to the surface of the vacuum insulation material 10 by the applied hot melt 50. However, at this stage, the wrinkles 16 of the edge 14 that are located between the turning rollers 1337 and that the turning roller 1337 has not passed through are not tightly fixed to the surface of the vacuum insulation material 10.

[0029] Thereafter, the ear bending jig 100 is moved further forward from the state shown in Fig. 12 to the state shown in Fig. 14. In this state, the fixed roller 1426 located behind the turning roller 1337 receives the downward elastic force of the spring 1421 and climbs up onto the portion of the vacuum insulation material 10 that includes the core material 11, and the contact point P4 with the ear 14 is located directly below the fixed roller 1426.

[0030] The edge bending jig 100 is then moved further forward. As a result, the fixed roller 1426 passes while pressing against the edge 14 of the vacuum insulation material 10 due to the elastic force of the spring 1421. Figure 15 is a diagram showing the positional relationship between the fixed roller 1426 and the vacuum insulation material 10 after passing through the edge 14. The fixed roller 1426 also passes through the parts of the wrinkles 16 that were between the swiveling rollers 1337 and that the swiveling rollers 1337 did not pass through. Therefore, the wrinkles 16 in the edge 14 are flattened by the passage of the fixed roller 1426, and the parts of the wrinkles 16 that the swiveling rollers 1337 were not able to tightly fix can also be tightly fixed to the surface of the vacuum insulation material 10.

[0031] The edge 14 on the opposite side of the vacuum insulation material 10 is then similarly folded by the edge folding jig 100. The vacuum insulation material 10 shown in Figure 16 is then completed. In this vacuum insulation material 10, the edge portions 14 on both sides are folded along the outer edge portion 13 of the core material 11. Here, because the outer edge portion 13 is deformed into an arc shape, wrinkles 16 are generated in the edge portions 14 when they are folded. However, the wrinkles 16 on each side are dispersed to two locations between the three spaced-apart rotating rollers 1337 that the rotating rollers 1337 did not pass through.

[0032] In this way, with the edge bending jig 100 according to this embodiment, when the edge 14 is bent toward the front surface of the vacuum insulation material 10, three spaced apart rotating rollers 1337 are pressed against the edge 14. This allows wrinkles 16 to be generated in two locations between the three rotating rollers 1337 that the rotating rollers 1337 did not pass through. The wrinkles 16 generated in these two locations are then pressed by the fixed roller 1426. This prevents large wrinkles from being generated during folding in the vacuum insulation material 10 whose edge 14 is bent using the edge bending jig 100 according to this embodiment. This prevents flow obstruction and air stagnation when filling the foam insulation material, making it possible to prevent a decrease in the insulating performance of the vacuum insulation material 10.

[0033] Furthermore, if the flow of the foam insulation material is obstructed during filling, the flow of the foam insulation material into the product casing will slow down, reducing the pressure of the bubbles and making filling more difficult, which will result in an increase in the amount of foam insulation material to be filled.In contrast, with vacuum insulation material 10 in which the ears 14 are folded using ear bending jig 100 according to this embodiment, such flow obstruction can be prevented, so the amount of foam insulation material required to be filled can be reduced, and the manufacturing costs of the product can be reduced.

[0034] Furthermore, when the turning roller 1337 of the edge bending jig 100 according to this embodiment is pressed against the edge 14, it automatically rotates so as to follow the outer edge 13 of the core material 11. This allows the turning roller 1337 to be pressed against the edge 14 at an appropriate angle, preventing the occurrence of large wrinkles and further preventing a decrease in the insulating performance of the vacuum insulating material 10 when the foam insulating material is filled.

[0035] [Embodiment 2] Next, a description will be given of the ear bending jig 200 according to embodiment 2. Note that the description of the same configuration as the ear bending jig 100 according to embodiment 1 will be appropriately simplified or omitted.

[0036] The turning roller 1337 of the edge bending jig 100 according to the first embodiment has a rotatable structure, and as shown in Fig. 11, it automatically rotates to follow the outer edge 13 of the core material 11 when pressed against the edge 14. However, depending on the shape of the outer edge 13, the turning roller 1337 does not necessarily rotate to follow the outer edge 13 when pressed against the edge 14. The second embodiment is characterized in that the turning roller 1337 rotates to reliably follow the outer edge 13, regardless of the shape of the outer edge 13.

[0037] 17 is a perspective view of an ear bending jig 200 according to the second embodiment. Ear bending jig 200 newly includes three motors 150A to 150C, three cameras 160A to 160C, a contact sensor 170, and a control device 180. In the following description, when there is no need to distinguish between motors 150A to 150C, they are also referred to as motors 150. Similarly, when there is no need to distinguish between cameras 160A to 160C, they are also referred to as cameras 160.

[0038] Each motor 150 is supported by L-shaped motor brackets 151A to 151C attached at equal intervals to the beam 112 of the first gate unit 110. The drive shaft of each motor 150 is connected to the upper end of the turning shaft 1334 of the turning roller unit 130 via couplings 152A to 152C. This allows the corresponding turning roller 1337 to rotate when the motor 150 is driven. The motors 150 are connected to a control device 180, and the drive of each motor 150 is controlled by the control device 180.

[0039] The cameras 160 are installed near and above each of the turning roller units 130. Figure 18 shows the positional relationship between the cameras 160, the turning rollers 1337, and the fixed rollers 1426. In this figure, A1 indicates the imaging area of ​​the camera 160A, B1 indicates the imaging area of ​​the camera 160B, and C1 indicates the imaging area of ​​the camera 160C. The positions and angles of the cameras 160A to 160C are adjusted so that the imaging area includes the ears 14 and the outer edge 13 of the core material 11 when the ears 14 are bent with the ear bending jig 200.

[0040] Returning to FIG. 17, contact sensor 170 is attached to turning roller 1337 of central turning roller unit 130B, detects contact of an object with turning roller unit 130B, and outputs a notification to that effect to control device 180. Note that contact sensor 170 may also be attached to turning rollers 1337 of left and right turning roller units 130A and 130C. Also, instead of contact sensor 170, a resistance measuring device may be used in which the anode is connected to the turning roller 1337 side and the cathode is connected to vacuum insulation material 10. In this way, when turning roller 1337 comes into contact with vacuum insulation material 10, the resistance value measured by the resistance measuring device decreases, and contact can be detected by detecting this.

[0041] The control device 180 is a computer equipped with a CPU (Central Processing Unit), RAM (Read Access Memory), ROM (Read Only Memory), secondary storage device, etc., and is connected to each motor 150, each camera 160, and contact sensor 170. When folding back the edge portion 14 of the vacuum insulation material 10, the control device 180 determines the outer edge portion 13 of the core material 11 of the vacuum insulation material 10 from the image captured by the camera 160. The control device 180 then performs a rotation control process to control each motor 150 so that the turning roller 1337 is at an appropriate rotation position along the determined outer edge portion 13. The control device 180 is an example of an outer edge determination unit and rotation control unit of the present disclosure.

[0042] Next, the rotation control process executed by the control device 180 will be described in more detail using the flowchart shown in FIG. 19. First, as in the first embodiment, bending of the edge 14 of the vacuum insulation material 10 is started. That is, the edge bending jig 200 is moved forward, and the edge 14 of the vacuum insulation material 10 raised by the positioning block 40 comes into contact with the turning roller 1337. At this time, the contact sensor 170 notifies the control device 180 that contact has occurred. When the control device 180 receives notification of contact from the contact sensor 170 (step S11; Yes), it analyzes the latest images captured by each camera 160 and determines the outer edge 13 of the core material 11 of the vacuum insulation material 10 (step S12). Note that instead of the cameras 160, a laser displacement meter whose scanning range is the area surrounding the outer edge 13 may be provided, and the control device 180 may determine the outer edge 13 based on the change in thickness of the vacuum insulation material 10 measured by the laser displacement meter.

[0043] Next, the control device 180 controls each motor 150 so that the turning roller 1337 follows the determined outer edge 13, i.e., so that the turning roller 1337 rotates at the same angle as the normal to the arc-shaped curve of the outer edge 13 (step S13). The motors are driven under the control of the control device 180, and the turning roller 1337 rotates at an angle that follows the outer edge 13.

[0044] Next, the control device 180 analyzes the latest images captured by the cameras 160 and determines whether the turning roller 1337 is aligned with the outer edge portion 13 (step S14). This confirms whether the control in step S13 is being executed correctly.

[0045] If it is determined that the turning roller 1337 is not aligned with the outer edge portion 13 (step S14; No), the process of step S13 is executed again, and the motor 150 is controlled so that the turning roller 1337 is aligned with the outer edge portion 13 again.

[0046] On the other hand, if it is determined that the turning roller 1337 is along the outer edge portion 13 (step S14; Yes), the rotation control process ends.

[0047] After the rotation control process is completed, the edge bending jig 200 is moved further forward, and the edge 14 is bent toward the surface of the vacuum insulation material 10 by the rotating roller 1337 and the fixed roller 1426, whose angles have been adjusted by the rotation control process.

[0048] In this way, in the second embodiment, when turning roller 1337 bends edge portion 14, outer edge portion 13 of core material 11 is identified, and the rotation of turning roller 1337 is controlled to follow the identified outer edge portion 13. This makes it possible to rotate turning roller 1337 to follow outer edge portions 13 of a wide variety of shapes, compared to the first embodiment, in which turning roller 1337 rotates passively when pressed against edge portion 14 without having a configuration for controlling such rotation, and makes it possible to more reliably prevent large wrinkles from occurring during folding.

[0049] [Other variations] The above-described embodiments are merely examples, and various modifications and applications are possible. For example, the above-described edge bending jigs 100, 200 have three turning rollers 1337, but may have three or more turning rollers 1337. The more turning rollers 1337 there are, the more wrinkles that occur when bending the edge 14 can be dispersed, making it possible to more reliably prevent large wrinkles from occurring. However, the manufacturing cost of the edge bending jigs 100, 200 increases.

[0050] Furthermore, although the above-described ear portion bending jigs 100 and 200 have one fixed roller 1426, they may have multiple fixed rollers 1426. For example, as shown in Fig. 20, the ear portion bending jigs 100 and 200 may have two short fixed rollers 1426, as long as they can cover the portion between the turning rollers 1337 that the turning rollers 1337 do not pass through.

[0051] In addition, in the above-described ear portion bending jigs 100 and 200, all three swivel rollers 1337 can be rotated, but it is not necessary to configure all three swivel rollers 1337 to be rotatable. For example, the swivel roller 1337 of the central swivel roller unit 130B may be configured not to rotate, similar to the fixed roller 1426.

[0052] In addition, in each of the above-described embodiments, the ear bending jig 100, 200 moves along the guide rail 30 to press the rotating roller 1337 and the fixed roller 1426 against each other to bend the ear 14, but the ear 14 may also be bent by moving the vacuum insulation material 10 toward the ear bending jig 100, 200.

[0053] Although several embodiments of the present disclosure have been described, these embodiments are presented as examples and are not intended to limit the scope of the disclosure. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the disclosure. These embodiments and their modifications are included within the scope and spirit of the disclosure, as well as within the scope of the disclosure and its equivalents as set forth in the claims. [Explanation of symbols]

[0054] 10 vacuum insulation material, 11 core material, 12 outer packaging material, 13 outer edge, 14 ear portion, 100, 200 ear portion bending jig, 110 first gate unit, 120 second gate unit, 111, 121 support, 112, 122 beam, 113, 123 base, 130 (130A to 130C) swivel roller unit, 131 swivel roller unit base, 132 swivel roller spring base, 1321 spring, 1322 linear bushing, 1323 linear shaft, 133 swivel roller base, 1331 shaft holder, 1332 swivel roller shaft, 1333 angular bearing, 1334 swivel shaft, 1335 precision lock nut, 1336 set collar, 1337 swivel roller, 140 fixed roller unit, 141 Fixed roller unit base, 142 fixed roller spring base, 1421 spring, 1422 linear bushing, 1423 linear shaft, 1424 shaft holder, 1425 fixed roller shaft, 1426 fixed roller, 150 (150A to 150C) motor, 151A to 151C motor bracket, 160 (160A to 160C) camera, 170 contact sensor, 180 control device, 20 stage, 30 guide rail, 40 positioning block, 50 hot melt, 16 wrinkle

Claims

1. A tool for bending an edge of a vacuum insulation material having a core material and an outer wrapping material covering the core material, the edge of which is a portion of the outer wrapping material that protrudes from the surface of the core material, so as to overlap with the surface side of the vacuum insulation material, At least three or more first rollers arranged apart from each other, which are pressed against the ear portions to fold the ear portions toward the surface of the vacuum insulation material along the outer edge of the core material; a second roller disposed between the plurality of first rollers and pressed against the ear portions not pressed against by the plurality of first rollers; A jig for bending ears.

2. At least one of the plurality of first rollers is rotatable so as to follow the outer edge of the core material when pressed against the ear portion. The ear bending jig according to claim 1 .

3. an outer edge discrimination unit that discriminates the outer edge of the core material; a rotation control unit that controls rotation of at least one of the plurality of first rollers so as to follow the outer edge of the core material determined by the outer edge determination unit; The ear bending jig according to claim 1 or 2, comprising:

4. A method for folding a vacuum insulation material having a core material and an outer packaging material covering the core material, in which an edge portion of the outer packaging material that protrudes from the surface of the core material is folded over onto the surface side of the vacuum insulation material, By pressing at least three or more first rollers arranged at a distance from each other against the ear portions, the ear portions are bent toward the surface of the vacuum insulation material along the outer edge of the core material, pressing a second roller against the ear portions that are located between the plurality of first rollers and that have not been pressed by the plurality of first rollers; How to fold the ears.

Images