Hole processing device

Abstract

The present invention provides a hole-making device capable of forming holes for gas vents in a panel. [Solution] The hole drilling device 900 forms a hole 70 in a panel 10A having a synthetic resin foam 4 between two metal outer shells 1, 2. The hole drilling device 900 comprises a plurality of drilling jigs 92 and a holder 93. The holder 93 holds the plurality of drilling jigs 92. Each of the plurality of drilling jigs 92 has an insertion pin 920 that is inserted into the synthetic resin foam 4 from the end face 10B of the panel 10A. The insertion pin 920 is formed to be movable in the axial direction of the insertion pin 920 relative to the holder 93 at a position facing the end face 10B of the panel 10A. The plurality of drilling jigs 92 are arranged along a direction perpendicular to the axial direction of the insertion pin 920.

Description

Technical Field

[0001] The present disclosure relates to a hole processing device. More specifically, the present disclosure relates to a hole processing device for a metal sandwich panel.

Background Art

[0002] Patent Document 1 describes a sandwich panel. This sandwich panel is formed by providing a heat insulating material between two metal outer skins. As the metal outer skin, a steel plate or an aluminum plate having a thickness of about 0.27 to 1 mm is used, and as the heat insulating material, a synthetic resin foam having a thickness of about 15 to 100 mm is used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the sandwich panel as described above, the heat insulating material and the metal outer skin are adhered by the adhesive force (self-adhesive force) generated when the heat insulating material cures from a liquid state to a foam state. However, due to the secular change of the core material and the metal plate, the heat insulating material and the metal outer skin are partially peeled off, and the metal outer skin bulges on the surface side of the sandwich panel at the portion peeled off from the heat insulating material, and the appearance of the sandwich panel may deteriorate.

[0005] Therefore, it has been considered to form holes for gas vents in the heat insulating material of the synthetic resin foam.

[0006] An object of the present disclosure is to provide a hole processing device capable of forming holes for gas vents in a panel having a synthetic resin foam.

Means for Solving the Problems

[0007] A hole-punching apparatus according to one aspect of the present disclosure is a hole-punching apparatus for forming holes in a panel having a synthetic resin foam between two metal shells. It comprises a plurality of drilling jigs and a holder for holding the plurality of drilling jigs. Each of the plurality of drilling jigs has an insertion pin that is inserted into the synthetic resin foam from the end face of the panel. The insertion pin is formed to be movable in the axial direction of the insertion pin relative to the holder at a position facing the end face of the panel. The plurality of drilling jigs are arranged perpendicular to the axial direction of the insertion pin. [Effects of the Invention]

[0008] According to this disclosure, holes for gas vents can be formed in a panel by inserting pins into a synthetic resin foam. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic diagram showing a first embodiment of the hole drilling apparatus according to this embodiment. [Figure 2] Figure 2 is a partial front view of the same object. [Figure 3] Figure 3 is a rear view of a portion of the same object. [Figure 4] Figure 4 is a partial bottom view of the same object. [Figure 5] Figure 5 is a partial plan view of the same. [Figure 6] Figure 6 is a partial side view of the same object. [Figure 7] Figure 7A is a plan view showing the drilling jig described above. Figure 7B is a side view showing the drilling jig described above. Figure 7C is a side view showing the drilling jig described above, but in a different configuration than that of Figure 7B. [Figure 8] Figure 8 is a partial side view of the same object. [Figure 9] Figure 9 is a schematic diagram showing the manufacturing process of a metal sandwich panel. [Figure 10] Figure 10 is a plan view showing a second embodiment of the hole drilling apparatus according to this embodiment. [Figure 11]FIG. 11 is a plan view showing a state different from FIG. 10 above. [Figure 12] FIG. 12 is a cross-sectional view showing the state before drilling the same hole as above. [Figure 13] FIG. 13 is a cross-sectional view showing the state of drilling the same hole as above. [Figure 14] FIG. 14 is a cross-sectional view showing the problems of a conventional metal sandwich panel. [Figure 15] FIG. 15 is a perspective view showing a metal sandwich panel in which a hole is formed by the hole processing device according to the present embodiment. [Figure 16] FIG. 16 is a cross-sectional view of the same. [Figure 17] FIG. 17 is a partial perspective view of the same. [Figure 18] FIG. 18 is a perspective view showing a part of a movable member used in the first embodiment of the hole processing device according to the present embodiment. [Figure 19] FIG. 19 is a perspective view showing an example of a pin member used in the first embodiment of the hole processing device according to the present embodiment. [Figure 20] FIG. 20 is a perspective view showing a part of another movable member used in the first embodiment of the hole processing device according to the present embodiment. [Figure 21] FIG. 21 is a cross-sectional view showing an insertion pin used in the second embodiment of the hole processing device according to the present embodiment. [Figure 22] FIG. 22 is a cross-sectional view showing a modified example of a metal sandwich panel drilled with a hole by the hole processing device according to the present embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0010] Hereinafter, the present disclosure will be described based on the embodiments shown in the accompanying drawings. However, the present disclosure is not limited to the following embodiments, and appropriate design changes can be made within the intended scope of the present disclosure.

[0011] (First Embodiment) (1) Outline Figure 14 shows a conventional metal sandwich panel 10x. This metal sandwich panel 10x has a synthetic resin foam 4 between two metal outer shells 1 and 2. The metal outer shells 1 and 2 are positioned opposite each other, and the synthetic resin foam 4 is provided as a core material between the metal outer shells 1 and 2. The synthetic resin foam 4 is a resin foam such as polyurethane foam or polyphenol foam, and has heat insulation and fire resistance. The synthetic resin foam 4 is formed when a resin liquid supplied to one side of one metal outer shell 1 is foamed. During the foaming of the resin liquid, the other metal outer shell 2 is positioned opposite the metal outer shell 1, and the resin liquid is further foamed between the metal outer shells 1 and 2. When the resin liquid is completely foamed, it becomes the synthetic resin foam 4. The synthetic resin foam 4 adheres to the metal outer shells 1 and 2 by its self-adhesive force.

[0012] Incidentally, the metal outer shell 1 and the metal outer shell 2 are positioned so as not to be in direct contact in order to prevent thermal bridging. For example, in Figure 14, at the bottom of the metal sandwich panel 10x, the lower part 1x of the metal outer shell 1 and the lower part 2x of the metal outer shell 2 are positioned opposite each other with a predetermined gap between them. Furthermore, a synthetic resin foam 4 is filled between the lower part 1x and the lower part 2x, so that the lower part 1x and the lower part 2x do not come into direct contact. Here, since the gap between the lower part 1x and the lower part 2x is formed before the resin liquid is completely foamed, a sealing material 6 is provided to close the gap between the lower part 1x and the lower part 2x, so that the resin liquid in the process of foaming does not leak out from between the lower part 1x and the lower part 2x.

[0013] Normally, the gas (such as carbon dioxide) generated during manufacturing is the vaporized foaming agent, and most of it is released outside the metal sandwich panel 10x through small gaps. However, sometimes the gas is not sufficiently released and remains in the synthetic resin foam 4. Also, if unreacted components remain in the synthetic resin foam 4, these unreacted components may react after the metal sandwich panel 10x is completed, generating new gas (such as carbon dioxide). If the gas in the synthetic resin foam 4 is not released to the outside from the metal sandwich panel 10x, the gas accumulates between the synthetic resin foam 4 and the metal shell 1, and the pressure of this gas can cause the synthetic resin foam 4 and the metal shell 1 to separate, resulting in a bulge 100x on a part of the metal shell 1, as shown in Figure 14. The area enclosed by the dashed line X in the figure is a particularly likely area for the bulge 100x to occur.

[0014] Therefore, the inventors have developed a metal sandwich panel 10 that is less prone to the formation of bulges 100x.

[0015] As shown in Figures 15 and 16, the metal sandwich panel 10 has a synthetic resin foam 4 between two metal outer shells 1 and 2. The two metal outer shells 1 and 2 each have opposing portions 111 and 211. The opposing portions 111 and 211 face each other at the ends of the metal sandwich panel 10 via the synthetic resin foam 4. A sealing material 6 is provided between the opposing portions 111 and 211, covering the lower end face 40 of the synthetic resin foam 4. A gas venting passage 7 is formed in the sealing material 6 and the synthetic resin foam 4.

[0016] In the metal sandwich panel 10, after the manufacturing of the metal sandwich panel 10, the gas in the synthetic resin foam 4 can be released to the outside of the metal sandwich panel 10 through the gas venting passage 7. This makes it less likely for the synthetic resin foam 4 and the metal outer shell 1 and 2 to separate due to gas pressure, and the metal outer shell 1 and 2 are less likely to bulge, thus reducing the likelihood of deterioration in appearance.

[0017] Furthermore, a metal sandwich panel 10 with a gas venting passage 7 will be described in detail.

[0018] As shown in Figure 15, the metal sandwich panel 10 comprises a surface plate 11 made of a first metal outer shell 1, a back plate 21 positioned opposite the surface plate 11 and made of a second metal outer shell 2, and a synthetic resin foam 4 disposed between the surface plate 11 and the back plate 21. The synthetic resin foam 4 has thermal insulation properties and is formed as the core material of the metal sandwich panel 10.

[0019] The metal sandwich panel 10 is formed in a substantially rectangular shape when viewed from the front. In this embodiment, the metal sandwich panel 10 has a fitting recess 9 formed at one end in the width direction and a fitting projection 8 formed at the other end. Multiple metal sandwich panels 10 are installed side by side on the same plane. In this case, adjacent metal sandwich panels 10 are connected by fitting the fitting recess 9 and the fitting projection 8. For convenience, in the following description of the metal sandwich panel 10, the direction in which the fitting recess 9 and the fitting projection 8 are fitted together will be defined as the width direction, the direction perpendicular to this width direction and along the in-plane direction of the metal sandwich panel 10 will be defined as the length direction, and the direction perpendicular to the width direction and the length direction will be defined as the thickness direction.

[0020] The lengthwise dimension of the metal sandwich panel 10 is greater than the widthwise dimension and the thicknesswise dimension. The widthwise dimension of the metal sandwich panel 10 is greater than the thicknesswise dimension. The metal sandwich panel 10 is usually installed with the widthwise direction being vertical and the lengthwise direction being horizontal. Therefore, the fitting recess 9 is provided at the upper end of the metal sandwich panel 10, and the fitting projection 8 is provided at the lower end of the metal sandwich panel 10. The fitting recess 9 and the fitting projection 8 are formed along the entire length of the metal sandwich panel 10. The first metal outer shell 1 and the second metal outer shell 2 face each other in the thicknesswise direction of the metal sandwich panel 10. The metal sandwich panel 10 may also be installed with the widthwise direction being horizontal and the lengthwise direction being vertical. In that case, the fitting recess 9 is provided at one end of the metal sandwich panel 10 in the horizontal direction, and the fitting projection 8 is provided at the other end of the metal sandwich panel 10 in the horizontal direction.

[0021] The first and second metal outer shells 1 and 2 are formed into predetermined shapes by processing a flat metal sheet, such as roll forming. The metal sheet can be one that has been conventionally used in forming building materials, such as SGL® steel sheet, galvalume steel sheet, galvanized steel sheet, or painted steel sheet. There are no particular limitations on the thickness of the metal sheet, and it can be, for example, 0.25 to 2.3 mm.

[0022] As shown in Figure 16, the first metal outer shell 1 has a first panel body 112. The first panel body 112 is formed in a flat plate shape and constitutes the main surface on the front side of the metal sandwich panel 10. The first metal outer shell 1 has a first horizontal piece 113. The first horizontal piece 113 protrudes rearward (towards the synthetic resin foam 4) from the upper end of the first panel body 112. The first metal outer shell 1 has a first vertical piece 114. The first vertical piece 114 protrudes upward from the upper end of the first horizontal piece 113. The first metal outer shell 1 has a lower grooved piece 115. The lower grooved piece 115 protrudes rearward (towards the synthetic resin foam 4) from the upper end of the first vertical piece 114. The first metal outer shell 1 has a grooved piece 116. The grooved piece 116 protrudes upward from the upper end of the lower grooved piece 115. The first metal outer shell 1 has an upper grooved piece 117. The upper grooved piece 117 protrudes forward (away from the synthetic resin foam 4) from the upper end of the grooved piece 116. The first metal outer shell 1 has a second vertical piece 118. The second vertical piece 118 protrudes upward from the upper end of the upper grooved piece 117. The first metal outer shell 1 has a first recessed piece 119. The first recessed piece 119 protrudes downward from the upper end of the second vertical piece 118, folding back. The first metal outer shell 1 has a first recessed bottom piece 120. The first recessed bottom piece 120 protrudes rearward from the lower end of the first recessed piece 119. The first metal outer shell 1 has a first upper insertion piece 121. The first upper insertion piece 121 protrudes downward from the rear end of the first recessed bottom piece 120. The first upper insertion piece 121 is inserted into the interior from the upper end face 42 of the synthetic resin foam 4.

[0023] The first metal shell 1 has a cover portion 3. The cover portion 3 is provided at the lower end of the first metal shell 1. The cover portion 3 has a front cover portion 30 and a rear cover portion 31. The front cover portion 30 is formed to protrude downward from the lower end of the first panel body 112. The front cover portion 30 and the first panel body 112 are formed flat without any steps. The rear cover portion 31 is located behind the front cover portion 30. The rear cover portion 31 is formed to fold back upward from the lower end of the front cover portion 30. The front cover portion 30 and the rear cover portion 31 face each other with a predetermined distance between them in the thickness direction (front-to-back direction). A resin reinforcing material 41 is filled between the front cover portion 30 and the rear cover portion 31.

[0024] The first metal outer shell 1 has a gap piece 122. The gap piece 122 protrudes rearward from the upper end of the rear cover portion 31. The first metal outer shell 1 has a first convex piece 123. The first convex piece 123 protrudes downward from the rear end of the gap piece 122. The first metal outer shell 1 has a first lower insertion piece 124. The first lower insertion piece 124 protrudes upward from the lower end of the first convex piece 123, folding back. The first lower insertion piece 124 is inserted into the interior from the lower end face 40 of the synthetic resin foam 4. The first lower insertion piece 124 and the first convex piece 123 face each other with a predetermined distance between them in the thickness direction (front-to-back direction). The first lower insertion piece 124 and the first convex piece 123 form a first opposing portion 111 at the lower end of the first metal outer shell 1.

[0025] As shown in Figure 16, the second metal outer shell 2 has a second panel body 212. The second panel body 212 is formed in a flat shape and constitutes the main surface on the front side of the metal sandwich panel 10. The second panel body 212 faces the first metal outer shell 1 in the thickness direction. The second metal outer shell 2 has a second recessed piece 219. The second recessed piece 219 protrudes downward from the upper end of the second panel body 212, folding back. The second recessed piece 219 faces the first recessed piece 119 in the thickness direction. The second metal outer shell 2 has a second recessed bottom piece 220. The second recessed bottom piece 220 protrudes forward from the lower end of the second recessed piece 219. The second metal outer shell 2 has a second upper insertion piece 221. The second upper insertion piece 221 protrudes downward from the front end of the second recessed bottom piece 220. The second upper insertion piece 221 is inserted into the interior from the upper end face 42 of the synthetic resin foam 4.

[0026] The second metal outer shell 2 has a lower section 222. The lower section 222 protrudes forward from the lower end of the second panel body 212. The second metal outer shell 2 has a second protruding section 223. The second protruding section 223 protrudes downward from the front end of the lower section 222. The second protruding section 223 faces the first protruding section 123 in the thickness direction with a predetermined distance between them. The second metal outer shell 2 has a second lower insertion section 224. The second lower insertion section 224 protrudes upward from the lower end of the second protruding section 223, folding back. The second lower insertion section 224 is inserted into the interior from the lower end face 40 of the synthetic resin foam 4. The second lower insertion section 224 and the second protruding section 223 face each other in the thickness direction (front-back direction) with a predetermined distance between them. Furthermore, the second lower insertion piece 224 and the second protruding piece 223 form a second opposing portion 211 at the lower end of the second metal outer shell 2. The first opposing portion 111 and the second opposing portion 211 face each other with a predetermined distance between them in the thickness direction (front-to-back direction).

[0027] The fitting recess 9 is formed by a space enclosed by a first recess piece 119, a second recess piece 219, a first recess bottom piece 120, a second recess bottom piece 220, and the upper end face 42 of the synthetic resin foam 4. A packing 90 made of EPDM, butyl rubber, and soft urethane foam is provided in the fitting recess 9 along its entire length. The fitting projection 8 is composed of a first opposing portion 111, a second opposing portion 211, and a part of the synthetic resin foam 4 located between the first opposing portion 111 and the second opposing portion 211.

[0028] As shown in Figure 16, a sealing material 6 is provided on the lower end face of the metal sandwich panel 10. The sealing material 6 is provided to prevent the synthetic resin foam 4 from leaking out between the first opposing portion 111 and the second opposing portion 211 during the manufacturing of the metal sandwich panel 10. The sealing material 6 is provided along the entire length. The end face 80 of the fitting projection 8, which is the lower end face of the metal sandwich panel 10, is formed by the outer surface of the sealing material 6 (the surface opposite to the synthetic resin foam 4). The sealing material 6 is provided spanning between the first projection piece 123 of the first opposing portion 111 and the second projection piece 223 of the second opposing portion 211. Therefore, the lower end face 40 of the synthetic resin foam 4 between the first opposing portion 111 and the second opposing portion 211 is covered by the sealing material 6. The sealing material 6 is bonded to the outer surface of the first protruding piece 123 and the outer surface of the second protruding piece 223.

[0029] The material of the sealing material 6 is not particularly limited, but it is preferably at least one selected from the group consisting of paper, resin film, nonwoven fabric, and woven fabric. As an example of paper, a two-layer structure consisting of kraft paper and an adhesive laminate material can be used. In this case, it is easy to form the gas venting passage 7 of the hole 70. The sealing material 6 is formed in a strip shape extending in the longitudinal direction and can be formed in the form of a sheet, film, plate, etc. The thickness of the sealing material 6 (vertical dimension) can be 0.01 mm or more and 0.5 mm or less, but is not limited to this, and any thickness that makes it easy to form the gas venting passage 7 of the hole 70 is acceptable.

[0030] The synthetic resin foam 4 is a component of the main body of the metal sandwich panel 10 and is made of resin foam. In this embodiment, the synthetic resin foam 4 is at least one selected from the group consisting of polyisocyanurate foam, urethane foam, styrene foam, or phenolic foam. Multiple types of these materials may be combined to form the synthetic resin foam 4, or only one of them may be used. Alternatively, multiple types of materials may be laminated in the thickness direction. Preferably, the synthetic resin foam 4 has heat insulation properties and fire resistance.

[0031] The metal sandwich panel 10 has a gas venting passage 7. The gas venting passage 7 is a passage for discharging gases such as carbon dioxide contained in the synthetic resin foam 4 to the outside of the metal sandwich panel 10. As shown in Figure 17, the gas venting passage 7 can be formed by a plurality of holes 70. The plurality of holes 70 are arranged in the length direction of the metal sandwich panel 10 at predetermined intervals, approximately in the center of the thickness direction of the metal sandwich panel 10. The plurality of holes 70 are formed between the first lower insertion piece 124 of the first opposing part 111 and the second lower insertion piece 224 of the second opposing part 211. The spacing between adjacent holes 70 is not particularly limited, but can be, for example, 5 mm or more and 100 mm or less. This makes it easier to discharge gases contained in the synthetic resin foam 4 to the outside of the metal sandwich panel 10. Note that the gas venting passage 7 can be formed in all directions (end faces of all four sides) of the metal sandwich panel 10. In order to suppress the occurrence of the bulge 100x, it is preferable to form a gas venting passage 7 on the end face 80 of the fitting projection 8, which is the lower end face.

[0032] Each hole 70 penetrates the sealing material 6 vertically and is formed within the synthetic resin foam 4. Therefore, the holes 70 are formed to reach from the inside of the synthetic resin foam 4 constituting the fitting projection 8 to the lower surface of the sealing material 6 (the end surface 80 of the fitting projection 8). That is, the holes 70 open to the lower end surface 40 of the synthetic resin foam 4 and also open to the end surface 80 of the fitting projection 8. The vertical dimension of the holes 70 is preferably larger than the vertical dimension of the fitting projection 8. For example, the upper end of the hole 70 is preferably located above the fitting projection 8 and at approximately the same height as the lower end of the second panel body 212 of the second metal outer shell 2. The vertical dimension of the holes 70 (the dimension from the opening on the lower surface of the sealing material 6 to the upper end) is not particularly limited, but can be 100 mm or less, and 20 mm to 40 mm is more preferable. This makes it easier to discharge the gas in the synthetic resin foam 4 to the outside of the metal sandwich panel 10. Furthermore, the diameter of each hole 70 is not particularly limited, but can be between 1.0 mm and 5.0 mm. This makes it easier to expel the gas contained in the synthetic resin foam 4 to the outside of the metal sandwich panel 10.

[0033] In the metal sandwich panel 10, after manufacturing, gas in the synthetic resin foam 4 can be released to the outside of the metal sandwich panel 10 through the gas venting passage 7 of the hole 70. That is, after the manufacturing of the metal sandwich panel 10, gases such as carbon dioxide and unreacted components in the synthetic resin foam 4 are introduced from the synthetic resin foam 4 into the hole 70, and this gas is discharged to the outside of the metal sandwich panel 10 through the hole 70 and the lower end opening of the hole 70 which opens to the lower surface of the sealing material 6. As a result, gas is less likely to accumulate in the synthetic resin foam 4, and delamination between the synthetic resin foam 4 and the metal outer shell 1 and 2 due to gas pressure is less likely to occur. As a result, the metal outer shell 1 and 2 are less likely to bulge, and deterioration of appearance is less likely to occur.

[0034] The hole-punching apparatus 900 of this embodiment is an apparatus for forming holes 70 for gas vents as described above. The hole-punching apparatus 900 comprises a mounting table 91, a plurality of drilling jigs 92, and a holder 93. A panel 10A having a synthetic resin foam 4 between two metal outer shells 1 and 2 is placed on the mounting table 91. The holder 93 holds the plurality of drilling jigs 92. Each of the plurality of drilling jigs 92 has an insertion pin 920 that is inserted into the synthetic resin foam 4 from the end face 10B of the panel 10A. The insertion pin 920 is formed to be movable in the axial direction of the insertion pin 920 relative to the holder 93 at a position facing the end face 10B of the panel 10A placed on the mounting table 91. The plurality of drilling jigs 92 are arranged along a line perpendicular to the axial direction of the insertion pin 920.

[0035] In the hole processing device 900 of this embodiment, an insertion pin inserted into the synthetic resin foam 4 can form a hole 70 for gas vents in the panel 10A.

[0036] In this embodiment, panel 10A is the same as a metal sandwich panel 10 without holes 70. In other words, by forming holes 70 in panel 10A, it becomes a metal sandwich panel 10. The end face 10B of panel 10A corresponds to the end face 80 of the metal sandwich panel 10.

[0037] (2)Details Figure 1 shows a hole-drilling device 900 of this embodiment. The hole-drilling device 900 comprises a plurality of drilling jigs 92 and a holder 93. In this disclosure, a plan view means a view of the hole-drilling device 900 from above. In this disclosure, the front-rear direction means the direction parallel to the axial direction (longitudinal direction) of the insertion pin 920. In this disclosure, the up-down direction means both vertically upward and vertically downward. In this disclosure, the left-right direction means the direction perpendicular to both the front-rear direction and the up-down direction. The above directions are merely defined for convenience in explaining this disclosure and do not limit this disclosure.

[0038] Each of the multiple drilling jigs 92 comprises a movable member 921 and a fixed member 922 (see Figures 7A, 7B, and 7C). The movable member 921 has an insertion pin 920. The fixed member 922 is held by a holder 93.

[0039] The insertion pin 920 is a slender, needle-shaped component with a pointed tip. The insertion pin 920 is inserted into the end face 10B of the panel 10A to form the hole 70. The insertion pin 920 has a circular cross-section and is formed to be longer in the axial direction (front-to-back direction) than in the diametrical direction of the cross-section.

[0040] The movable member 921 has a shaft portion 923. The shaft portion 923 is a rod-shaped member formed to be long and approximately parallel to the axial direction (longitudinal direction) of the insertion pin 920. The insertion pin 920 is provided protruding from the front end of the shaft portion 923. A wheel 924 is provided at the rear end of the shaft portion 923. The wheel 924 is rotatably attached to the rear end of the shaft portion 923 by a rotating shaft 925. The rotating shaft 925 is formed to be long in a direction perpendicular to the axial direction of the insertion pin 920.

[0041] The movable member 921 can be formed by comprising a pin member 942 having an insertion pin 920 and a shaft portion 923. The pin member 942 and the shaft portion 923 can be formed from different materials. The pin member 942 can be detachably attached to the tip of the shaft portion 923.

[0042] Figure 18 shows an example of a pin member 942. This pin member 942 has an insertion pin 920, a base portion 943, and a male threaded portion 944, but a member in which the insertion pin 920, base portion 943, and male threaded portion 944 are integrated by welding can be used. In this case, a commercially available nail can be used as the insertion pin 920.

[0043] The pin member 942 is then attached to the tip of the shaft portion 923 by coupling with the female thread portion 945 provided on the shaft portion 923. The female thread portion 945 is provided at the axial tip of the shaft portion 923, and the female thread portion 945 can be formed by providing a female thread on the inner circumferential surface of a recess that opens to the tip surface of the shaft portion 923.

[0044] Figure 19 shows another example of the pin member 942. This pin member 942 has an insertion pin 920, a base portion 943, and a male threaded portion 944. The pin member 942 is a component integrally molded by machining, consisting of the insertion pin 920, the base portion 943, and the male threaded portion 944. The insertion pin 920 protrudes forward from the base portion 943. The male threaded portion 944 protrudes rearward from the base portion 943.

[0045] Figure 20 shows another example of the pin member 942. This pin member 942 has an insertion pin 920 and a base portion 943. The insertion pin 920 is shaped like a nail. The base portion 943 has a shape like a cap nut and has an insertion hole 946 in the center. After inserting the insertion pin 920 into the insertion hole 946 of the base portion 943, the female thread portion of the base portion 943 is connected to the male thread portion 948 provided on the outer circumferential surface of the tip of the shaft portion 923.

[0046] The insertion pin 920 can be manufactured by machining the tip of a block of steel (making it thinner using a machining center, etc.). To allow for angle adjustment and flexibility at the tip, the insertion pin 920 can be made from a slightly ductile material; for example, stainless spring steel can be used.

[0047] The fixing member 922 comprises a flat fixing portion 926, a front mounting portion 927, and a rear mounting portion 928. The movable member 921 is attached to the fixing member 922 by the front mounting portion 927 and the rear mounting portion 928. The shaft portion 923 is inserted through the front mounting portion 927 and the rear mounting portion 928. The movable member 921 is mounted so as to be movable in the front-rear direction relative to the fixing member 922. The fixing portion 926 is attached to the annular body 930 of the holder 93. As a result, multiple drilling jigs 92 are held by the holder 93.

[0048] The drilling jig 92 includes a spring member 929. The spring member 929 is made of a coil spring and is provided on the outer circumference of the shaft portion 923. The spring member 929 is provided between the front mounting portion 927 and the stopper 960. The stopper 960 is provided protruding from the outer circumference of the shaft portion 923 between the front mounting portion 927 and the rear mounting portion 928.

[0049] The spring member 929 has its front end locked to the front mounting portion 927 and its rear end locked to the stopper 960. Therefore, as shown in Figure 7C, when the movable member 921 is pressed from the rear and moves forward relative to the fixed member 922, the spring member 929 is pressed in the front-rear direction by the front mounting portion 927 and the stopper 960 and contracts. When the force pressing the movable member 921 from the rear is removed, the spring member 929 extends due to its elastic force, and as shown in Figure 7B, the movable member 921 moves backward relative to the fixed member 922.

[0050] As shown in Figures 2 and 3, the holder 93 holds a plurality of drilling jigs 92. The holder 93 has a structure similar to that of a chain belt conveyor. The holder 93 has a pair of annular bodies 930. Each annular body 930 is formed from an endless loop-shaped chain (a ring without an end). Each annular body 930 is arranged across a pair of sprockets 931 that are aligned in the left-right direction (see Figure 5).

[0051] A pair of annular bodies 930 are arranged side by side in the front-to-back direction. A pair of sprockets 931, arranged side by side in the left-to-right direction, are each positioned opposite each other in the front-to-back direction. The pair of sprockets 931 that are opposite each other in the front-to-back direction are connected by a shaft portion 932 that is long in the front-to-back direction. The pair of sprockets 931 that are opposite each other in the front-to-back direction rotate together with the rotation of the shaft portion 932. Each shaft portion 932 is held by a pair of bearings 933 that are arranged side by side in the front-to-back direction. Each bearing 933 is fixed to a pair of fixing plates 907 that are arranged side by side in the front-to-back direction. The pair of annular bodies 930 are formed to be rotatable so as to move in one direction. The pair of annular bodies 930 obtain rotational driving force via insertion pins 920 that are inserted into panel 10A.

[0052] Multiple drilling jigs 92 are each attached to a pair of annular bodies 930. Each drilling jig 92 has its front fixing member 922 rotatably attached to the front annular body 930, and its rear fixing member 922 rotatably attached to the rear annular body 930.

[0053] The multiple drilling jigs 92 are arranged in a direction perpendicular to the axial direction of the insertion pin 920. That is, the multiple drilling jigs 92 are attached to the pair of annular bodies 930 in the direction of travel of the pair of annular bodies 930 in a plan view. The multiple drilling jigs 92 are attached alternately to the inner and outer links of the pair of annular bodies 930.

[0054] Multiple drilling jigs 92 attached to the holder 93 are each formed so that the insertion pin 920 is movable in the axial direction of the insertion pin 920 relative to the holder 93, at a position where the insertion pin 920 faces the end face 10B of the panel 10A placed on the mounting base 91. In this embodiment, a pressing part 95 is provided to move the insertion pin 920 in the axial direction. The pressing part 95 moves the insertion pin 920 forward in the axial direction relative to the fixed member 922 by pressing the movable member 921 from the rear and moving it forward relative to the fixed member 922.

[0055] As shown in Figures 4 and 5, the hole drilling device 900 has a pressing section 95. The pressing section 95 is located below the sprocket 931 and behind the multiple drilling jigs 92 held by the holder 93. In a plan view, the pressing section 95 is positioned approximately in the center of the holder 93 in the left-right direction.

[0056] The pressing portion 95 includes an inclined portion 950. In a plan view, the inclined portion 950 is inclined with respect to the axial direction of the insertion pin 920. That is, in a plan view, the inclined portion 950 is also inclined with respect to the direction of travel of the pair of annular bodies 930 (a direction perpendicular to the axial direction of the insertion pin 920).

[0057] The inclined portion 950 is inclined so as to gradually protrude forward from one end to the other in the left-right direction. For example, in Figure 4, the inclined portion 950 is inclined so as to gradually protrude forward from the right end to the left end. In this case, the direction of movement of the pair of annular bodies 930 below the sprocket 931 is from right to left, and accordingly, the multiple drilling jigs 92 attached to the pair of annular bodies 930 also move from right to left.

[0058] As the multiple drilling jigs 92 move left and right in front of the inclined section 950, the wheels 924 provided at the rear end of each drilling jig 92 come into contact with the inclined section 950 and move along the inclined section 950 while rotating. As a result, the rear end of the movable member 921 of each drilling jig 92 is pressed against the inclined section 950, and the movable member 921 moves forward in the axial direction of the insertion pin 920 relative to the fixed member 922. In other words, the movable member 921 moves forward due to the cam mechanism, and the insertion pin 920 also moves forward as a result.

[0059] As the multiple drilling jigs 92 move further in the left-right direction, the wheels 924 reach the end of the inclined section 950. As a result, the wheels 924 detach from the inclined section 950, and the force pushing the movable member 921 forward is eliminated. The movable member 921 then moves backward due to the elastic force of the spring member 929, returning to its original position before moving forward.

[0060] In this embodiment, the insertion pin 920 can be gradually advanced in sequence by moving the multiple drilling jigs 92 in the left-right direction.

[0061] As shown in Figures 3, 5, and 8, the hole drilling device 900 is equipped with a support roll 97. The support roll 97 supports the transport of the panel 10A as it moves on the mounting table 91, thereby reducing the tilting and rattling of the panel 10A and improving the accuracy of the position and dimensions of the holes 70.

[0062] Support rolls 97 are provided one on each side in the left and right directions. The support rolls 97 are located outside (to the right and left) of the drilling jig 92 held by the holder 93. The support rolls 97 consist of a vertical roll 971 and a horizontal roll 972. The vertical roll 971 has a shaft portion 973 that extends in the front-rear direction and is rotatable about this shaft portion 973. The horizontal roll has a shaft portion 974 that extends in the up-down direction and is rotatable about this shaft portion 974.

[0063] The support roll 97 is provided on the roll holding section 975. The shaft portion 973 is fixed to the front of the roll holding section 975. Therefore, the vertical roll 971 is located in front of the roll holding section 975. The shaft portion 974 is fixed to the lower part of the roll holding section 975. Therefore, the horizontal roll 972 is located below the roll holding section 975. The roll holding section 975 is fixed to the left and right ends of the front plate 976, which is located in front of the fixing plate 907.

[0064] The hole drilling device 900 has a pair of left and right cylinders 904. A front plate 976 and a fixing plate 907 are connected to these cylinders 904. The cylinders 904 are made movable in the front-rear direction by a cylinder drive unit (solenoid valve) 905 fixed to a trolley 901. The hole drilling device 900 has multiple drilling jigs 92, holders 93, pressing parts 95 and support rolls 97, etc., which are made movable in the front-rear direction by the cylinder drive unit 905 and the cylinders 904.

[0065] The hole drilling device 900 is mounted on a trolley 901. The trolley 901 has wheels 903 on the underside of a frame 902 and is formed to be movable. The cylinder drive unit 905 of the hole drilling device 900 can be fixed on the frame 902.

[0066] <Drilling operation using a hole processing machine> The hole drilling device 900 drills holes in the panel 10A. The panel 10A is the workpiece to be drilled and is formed by having a synthetic resin foam 4 between two metal outer shells 1 and 2. The cross-sectional shape of the panel 10A is the same as the cross-sectional shape of the metal sandwich panel 10.

[0067] First, the trolley 901 is moved and positioned in the front-to-back direction relative to the mounting platform 91. The mounting platform 91 is the platform on which the panel 10A is placed. The mounting platform 91 is equipped with multiple movable rolls 96. The multiple movable rolls 96 are provided on the upper part of the frame-shaped base body 911 of the mounting platform 91. The multiple movable rolls 96 are rolls for transporting the panel 10A. In a plan view, the multiple movable rolls 96 transport the panel 10A in a direction in which the multiple drilling jigs 92 are lined up.

[0068] Each movable roll 96 is formed to be rotatable with its axis in the front-rear direction. Multiple movable rolls 96 are arranged in a direction perpendicular to the axis direction of the movable rolls 96. Panel 10A is placed on multiple movable rolls 96 and is conveyed by the rotation of the multiple movable rolls 96 (see Figure 9).

[0069] Next, the cylinder drive unit 905 drives the cylinder 904 to position the hole drilling device 900 above the mounting table 91. Then, the panel 10A is placed on the mounting table 91 and the moving roll 96 transports the panel 10A in either the left or right direction. The panel 10A is transported while being supported by the support roll 97. As shown in Figure 8, the vertical roll 971 contacts the rear cover portion 31 of the cover portion 3 from above. The horizontal roll 972 contacts the front end of the cover portion 3 from behind. During hole drilling, the panel 10A is transported in a sideways position (the front-to-back direction in Figure 16 becomes the up-and-down direction in Figure 8, and the up-and-down direction in Figure 16 becomes the front-to-back direction in Figure 8). In this embodiment, hole drilling can be performed on multiple types of panels 10A with different thicknesses, for example, panels 10A with thicknesses from 25 to 100 mm can be accommodated.

[0070] Next, the end face 10B of panel 10A (the lower surface of the fitting projection 8) and the tip of the insertion pin 920 are brought into opposition in the front-to-back direction (the axial direction of the insertion pin 920). Here, the insertion pins 920 facing the end face 10B of panel 10A are the insertion pins 920 of the multiple drilling jigs 92 located below the height position of the sprocket 931. In a plan view, the multiple insertion pins 920 are aligned in the left-to-right direction and facing the flat end face 10B.

[0071] Next, the pair of annular bodies 930 of the holder 93 are rotated to move the multiple drilling jigs 92 in succession. As the pair of annular bodies 930 rotate and the multiple drilling jigs 92 are moved, the movable member 921 of each drilling jig 92 is pressed from behind by the pressing part 95. As a result, the movable member 921 moves forward, and along with it, the insertion pin 920 also moves forward and is inserted into the synthetic resin foam 4 through the end face 10B of the panel 10A, passing through the sealing material 6, as shown in Figure 6. In this way, holes 70 for gas vents can be formed in the panel 10A. Furthermore, by sequentially inserting the multiple insertion pins 920 into the end face 10B of the panel 10A while the panel 10A is being transported, multiple holes 70 aligned in the transport direction of the panel 10A can be formed in succession. The insertion pin 920, which has a hole 70 formed in it, is pulled out from the end face 10B of the panel 10A as the movable member 921 moves backward due to the elastic force of the spring member 929.

[0072] The power source for the rotation of the pair of annular bodies 930 is obtained via insertion pins 920 inserted into the panel 10A, which is transported by the driving force of the manufacturing equipment. Therefore, no driving force such as a motor is required to rotate the pair of annular bodies 930. Furthermore, it becomes possible to linearly adjust the rotational speed of the pair of annular bodies 930 in response to increases or decreases in the production speed (transport speed) of the panel 10A (such as restarting from a stopped state or sudden stops).

[0073] Specifically, when multiple drilling jigs 92 are attached to the inclined portion 950 of the pressing portion 95, the multiple drilling jigs 92, each having an insertion pin 920, advance in sync with the panel 10A to be processed. After this, the insertion pin 920 of the drilling jig 92 located at the apex of the pressing portion 95 pierces the end face 10B of the panel 10A, and the insertion pins 920 of subsequent drilling jigs 92 also successively pierce the end face 10B of the panel 10A. As the panel 10A moves, each pierced insertion pin 920 generates kinetic energy that causes it to be displaced by axial shear stress in the transport direction (direction of travel) of the panel 10A.

[0074] Therefore, by balancing the resistance required for the rotation of the pair of annular bodies 930, which have multiple (34) drilling jigs 92, with the function (spring rate) of the insertion pin 920 to return to its original position, the elongation of the holes 70 to be processed is corrected, and the rotational motion of the pair of annular bodies 930 itself does not require an external driving force.

[0075] In a single drilling jig 92, when climbing the inclined portion 950 of the pressing portion 95, the drilling jig 92 has a spring member 929 built into it, so when the insertion pin 920 is pushed forward, it returns due to the elastic force of the spring member 929. When the drilling jig 92 tries to climb the inclined portion 950, the insertion pin 920 moves forward, but a force is also generated that tries to push it back due to the spring member 929. When the drilling jig 92 descends the inclined portion 950, the opposite force acts. As multiple insertion pins 920 are constantly embedded in the panel 10A, a rotational force is continuously generated in the pair of annular bodies 930.

[0076] As the rotation of the pair of annular bodies 930 becomes smoother, inertial force is generated, reducing the load on each hole 70. On the other hand, the greatest load is applied when the transport of panel 10A restarts from a stopped state, but since multiple insertion pins 920, rather than just one, are inserted into panel 10A, the drilling process can continue at the same rate as when the panel 10A is rotating smoothly, even when the transport of panel 10A restarts. In this way, the pair of annular bodies 930 can rotate without using a motor or other driving force.

[0077] <Manufacturing of metal sandwich panels> First, as shown in Figure 9, the first and second metal outer shells 1 and 2 are formed from metal sheets 1A and 2A. The metal sheet 1A, wound in a roll, is fed out by a feeding device 55A and continuously supplied to a roll forming machine 56A. The roll forming machine 56A then forms various parts such as the covering portion 3 and the first opposing portion 111 to form the first metal outer shell 1. Similarly, the metal sheet 2A, wound in a roll, is fed out by a feeding device 55B and continuously supplied to a roll forming machine 56B. The roll forming machine 56B then forms various parts such as the second opposing portion 211 to form the second metal outer shell 2.

[0078] Next, a sealing member 33 is provided in the void 32 of the covering portion 3 of the first metal outer shell 1. In this case, the sealing member 33 is packed into the void 32 from the opening 320. The sealing member 33 is packed into the void 32 between the roll molding machine 56A and the liquid supply device 58. The sealing member 33 may be packed into the void 32 manually, or an appropriate filling device may be used.

[0079] Next, the first metal shell 1 is heated by a heating device 57A, such as a high-frequency heating device, while being continuously transported. Similarly, the second metal shell 2 is heated by a heating device 57B, such as a high-frequency heating device, while being continuously transported.

[0080] Next, the resin liquid 45 is supplied to one side of the first metal shell 1 (the side that will be bonded to the synthetic resin foam 4). During the manufacturing of the metal sandwich panel 10, the first metal shell 1 has the side that will be bonded to the synthetic resin foam 4 facing upward. The resin liquid 45 is supplied from the liquid supply device 58 to the upward-facing side of the first metal shell 1. The resin liquid 45 is a liquid resin material that foams up to become the synthetic resin foam 4. Next, while the resin liquid 45 is foaming, the second metal shell 2 is placed opposite the first metal shell 1. At this time, the side of the second metal shell 2 that will be bonded to the synthetic resin foam 4 is facing downward. Then, the resin liquid 45 is further foamed between the first panel body 112 of the first metal shell 1 and the second panel body 212 of the second metal shell 2, which are facing each other vertically. At this time, a sealing material 6 is placed between the opposing portion 111 of the first metal outer shell 1 and the opposing portion 211 of the second metal outer shell 2, which are arranged opposite each other. The sealing material 6 is placed across the outer surface of the first protruding piece 123 and the outer surface of the second protruding piece 223. The surface of the sealing material 6 that is in contact with the synthetic resin foam 4 is bonded by the self-adhesive force of the synthetic resin foam 4 (resin liquid 45). In addition, the packing 90 is placed in the space surrounded by the first recessed piece 119, the second recessed piece 219, the first recessed bottom piece 120, and the second recessed bottom piece 220.

[0081] To further foam the resin liquid 45 between the first metal shell 1 and the second metal shell 2, the opposing first metal shell 1 and second metal shell 2 are sandwiched between a double conveyor 59 in a heating furnace 60 and heated and pressurized. When the resin liquid 45 is completely foamed, it becomes a synthetic resin foam 4.

[0082] The synthetic resin foam 4 adheres to the first metal shell 1 and the second metal shell 2 by its self-adhesive force. The first metal shell 1 and the second metal shell 2 are positioned so as not to be in direct contact with each other in order to prevent thermal bridging. Therefore, the first opposing part 111 and the second opposing part 211 face each other with a predetermined distance between them in the thickness direction (front-to-back direction), but the space between the first opposing part 111 and the second opposing part 211 is sealed with a sealing material 6 to prevent leakage of the synthetic resin foam 4 during foaming. However, if the space between the first opposing part 111 and the second opposing part 211 is narrow and the synthetic resin foam 4 during foaming does not leak, the sealing material 6 may not be used. There should be a gap between the first protruding piece 123 and the second protruding piece 223 large enough to allow for a gas venting passage 7 to be provided.

[0083] In this way, the first metal shell 1 and the second metal shell 2 are integrated with the synthetic resin foam 4, and a long panel 10A is continuously manufactured. After this, multiple holes 70, which serve as gas venting passages 7, are formed in the sealing material 6 and the synthetic resin foam 4. The insertion pins 920 of the hole processing device 900 are inserted from the outside of the sealing material 6 to the synthetic resin foam 4 to sequentially form the multiple holes 70. After this, the long panel 10A can be cut to the desired length with a cutting device 61 such as a cutter to manufacture the metal sandwich panel 10.

[0084] The order of forming the holes 70 by the hole processing device 900 and cutting the long panel 10A by the cutting device 61 may be reversed. That is, after cutting the long panel 10A to the desired length with the cutting device 61, the insertion pin 920 of the hole processing device 900 may be inserted from the outside of the sealing material 6 to the synthetic resin foam 4 to sequentially form multiple holes 70. In this case, the hole processing device 900 is located downstream of the cutting device 61 in the transport direction of the long panel 10A. The insertion pin 920 of the hole processing device 900 and the mounting configuration of the insertion pin 920 can be either as shown in Figure 18 or Figure 20, but in the first embodiment, it is preferable to use the insertion pin 920 as shown in Figure 18. Nails may also be used.

[0085] (modified version) In the above embodiment, the hole 70 was formed by moving the panel 10A relative to the hole drilling device 900, but the invention is not limited to this, and the hole 70 may also be formed by moving the hole drilling device 900 relative to the panel 10A.

[0086] In the above embodiment, the driving force for rotating the annular body 930 is obtained via an insertion pin 920 inserted into the panel 10A, but the invention is not limited to this, and the annular body 930 may also be rotated by a drive unit 94. In this case, the drive unit 94 is connected to one of the pair of shaft portions 932 that are arranged in the left-right direction via a one-way clutch 934 and a coupling 935. The drive unit 94 is composed of a motor or the like, and the rotating shaft 941 of the drive unit 94 is connected to one of the shaft portions 932 via a one-way clutch 934 and a coupling 935.

[0087] The driving force generated by the drive unit 94 is transmitted to one of the shafts 932 via the rotating shaft 941, the one-way clutch 934, and the coupling 935. As this shaft 932 rotates, the pair of sprockets 931 on the left (or right) side connected to this shaft 932 rotate. The driving force is also transmitted to the pair of sprockets 931 on the right (or left) side via the pair of annular bodies 930, causing them to rotate. As a result, the pair of annular bodies 930 move forward so that they rotate at the same speed.

[0088] In forming multiple holes 70 in panel 10A, the drive unit 94 rotates a pair of annular bodies 930 of the holder 93 to continuously move the multiple drilling jigs 92. Here, the transport direction of panel 10A (left or right) and the movement direction of the insertion pins 920 at a position facing the end face 10B of panel 10A are the same. The transport speed of panel 10A and the movement speed of the insertion pins 920 at a position facing the end face 10B may be the same or different. By adjusting these speeds, the spacing between the multiple holes 70 can be adjusted.

[0089] In the above embodiment, a case was described in which the first metal casing 1 has a first upper insertion piece 121 and a first lower insertion piece 124, and the second metal casing 2 has a second upper insertion piece 221 and a second lower insertion piece 224, but it is not limited to this. As shown in Figure 22, the first metal casing 1 does not have to have a first upper insertion piece 121 and a first lower insertion piece 124, and the second metal casing 2 does not have to have a second upper insertion piece 221 and a second lower insertion piece 224.

[0090] If the first lower insertion piece 124 and the second lower insertion piece 224 are absent, the first opposing portion 111 is formed by the first lower insertion piece 124, and the second opposing portion 211 is formed by the second lower insertion piece 224. The multiple holes 70 are then formed between the first lower insertion piece 124 and the second lower insertion piece 224.

[0091] If the first upper insertion piece 121, the first lower insertion piece 124, the second upper insertion piece 221, and the second lower insertion piece 224 are not formed, the number of manufacturing steps for the metal sandwich panel 10 is reduced, and costs can be lowered.

[0092] (Second Embodiment) The hole drilling apparatus 900A according to this embodiment differs from the hole drilling apparatus 900 according to the first embodiment in the configuration of the holder 93. Hereinafter, components similar to those in the first embodiment will be denoted by common reference numerals and their descriptions will be omitted as appropriate. The configuration described in the second embodiment can be applied in appropriate combination with the configuration described in the first embodiment (including modified versions).

[0093] The hole-punching device 900A can manually form multiple holes 70 in the panel 10A. The hole-punching device 900A includes a drilling jig 92 having multiple insertion pins 920. The drilling jig 92 is formed by arranging multiple insertion pins 920 in the left-right direction on a substrate 910 that is long in the left-right direction. As shown in Figure 21, the substrate 910 is formed by joining a lower substrate 912 and an upper substrate 913 with fasteners 914 such as screws. The base portion 9201 of the insertion pins 920 is held between the lower substrate 912 and the upper substrate 913. Nails can be used as insertion pins 920.

[0094] The holder 93 consists of a pair of protrusions 915 and a gripping portion 916. The pair of protrusions 915 project backward from the left and right ends of the substrate 910. The gripping portion 916 is provided between the rear ends of the pair of protrusions 915.

[0095] A support plate 917 is provided in front of the circuit board 910. The support plate 917 has through holes 918 into which a plurality of insertion pins 920 are each inserted. The through holes 918 penetrate the support plate 917 in the front-to-back direction. The support plate 917 is provided with insertion portions 919. The insertion portions 919 are provided protruding from the lower front surface of the support plate 917.

[0096] The substrate 910 and the support plate 917 are connected by a pair of guide rods 955. The pair of guide rods 955 protrude rearward from the support plate 917. The pair of guide rods 955 are inserted into a pair of guide holes 956 provided in the substrate 910. The pair of guide holes 956 penetrate the substrate 910 in the front-to-back direction. A stop member 957 is provided between the rear ends of the pair of guide rods 955 that penetrate the substrate 910.

[0097] The substrate 910 is mounted on a pair of guide rods 955 so as to be slidable in the front-rear direction. Figure 10 shows the substrate 910 in its furthest rearward position, where its rearward movement is restricted by contact with a stop member 957. Figure 11 shows the substrate 910 in its furthest forward position, where its forward movement is restricted by contact with a support plate 917. The front-rear movement of the substrate 910 is guided by the pair of guide rods 955.

[0098] The substrate 910 and the support plate 917 are connected by a pair of connecting rods 995. A spring member 958, which is a coil spring, is provided on the outer circumference of each connecting rod 995. The front ends of the pair of connecting rods 995 are connected to the support plate 917. The connecting rods 995 are also inserted into connecting holes 996 in the substrate 910. The substrate 910 can move forward against the elastic force of the spring member 958 by contracting the spring member 958 in the front-rear direction. The substrate 910 can also be moved backward by the elastic force of the spring member 958.

[0099] To perform hole drilling with this hole drilling device 900A, first, as shown in Figure 12, the front surface of the support plate 917 is brought into contact with the end face 10B of the panel 10A. The insertion part 919 is then inserted into the space between the cover part 3 and the fitting projection 8. After positioning the multiple insertion pins 920 facing the end face 10B of the panel 10A in this manner, the gripping part 916 is held by hand and the substrate 910 is pressed forward. As a result, as shown in Figure 13, the substrate 910 moves forward, and the multiple insertion pins 920 also move forward with it. Then, as the multiple insertion pins 920 are inserted into the end face 10B, a hole 70 for gas vents is formed in the synthetic resin foam 4. After this, the substrate 910 is moved backward by the spring member 958, and the insertion pins 920 are pulled out from the end face 10B. Finally, the insertion portion 919 is withdrawn from the space between the covering portion 3 and the fitting projection 8, and the support plate 917 is separated from the end face 10B.

[0100] In this way, multiple holes 70 can be easily formed in the panel 10A using the hole processing device 900A.

[0101] Furthermore, while both Figure 18 and Figure 20 can be used for the insertion pin 920 of the hole processing device 900A and the mounting configuration of the insertion pin 920, it is preferable to use the insertion pin 920 (nail) shown in Figure 20 for the second embodiment.

[0102] (summary) As described above, the hole-drilling apparatus (900) according to the first embodiment forms a hole (70) in a panel (10A) having a synthetic resin foam (4) between two metal outer shells (1, 2). The hole-drilling apparatus (900) comprises a plurality of drilling jigs (92) and a holder (93). The holder (93) holds the plurality of drilling jigs (92). Each of the plurality of drilling jigs (92) has an insertion pin (920) that is inserted into the synthetic resin foam (4) from the end face (10B) of the panel (10A). The insertion pin (920) is formed to be movable in the axial direction of the insertion pin (920) relative to the holder (93) at a position facing the end face (10B) of the panel (10A). The plurality of drilling jigs (92) are arranged in a direction perpendicular to the axial direction of the insertion pin (920).

[0103] According to this embodiment, a hole (70) for gas venting can be formed in the panel (10A) by inserting an insertion pin (920) into the synthetic resin foam (4) from the end face (10B) of the panel (10A).

[0104] A second embodiment is a hole-drilling apparatus (900) according to the first embodiment, wherein the holder (93) comprises an endless loop-shaped annular body (930). The plurality of drilling jigs (92) are attached to the annular body (930). The annular body (930) is formed to be rotatable in the direction in which the plurality of drilling jigs (92) are aligned.

[0105] According to this embodiment, by rotating the annular body (930), multiple drilling jigs (92) can be moved, making it easier to continuously form multiple holes (70) in the panel (10A).

[0106] A third embodiment is a hole drilling apparatus (900) according to the first or second embodiment, wherein a plurality of hole drilling jigs (92) each comprises a movable member (921) provided with an insertion pin (920) and a fixed member (922) held by a holder (93). The movable member (921) is formed to be movable relative to the fixed member (922) in the axial direction of the insertion pin (920). The apparatus further comprises a pressing part (95) which moves the movable member (921) relative to the fixed member (922) in the axial direction of the insertion pin (920) by pressing it.

[0107] According to this embodiment, by pressing the movable member (921) with the pressing part (95), the insertion pin (920) can be inserted into the synthetic resin foam (4) from the end face (10B) of the panel (10A), and a plurality of holes (70) can be formed in the panel (10A).

[0108] The fourth aspect is a hole drilling apparatus (900) according to the third aspect, wherein the pressing portion (95) has an inclined portion (950) into which a movable member (921) makes contact while moving in a direction perpendicular to the axial direction of the insertion pin (920) in a plan view. The inclined portion (950) is inclined with respect to the axial direction of the insertion pin (920) in a plan view.

[0109] According to this embodiment, the movable member (921) moves along the inclined portion (950) while in contact with the inclined portion (950), thereby allowing the movable member (921) to be pressed by the pressing portion (95) and move.

[0110] A fifth embodiment is a hole-punching apparatus (900) according to the first or second embodiment, further comprising a support roll (97) that contacts a panel (10A) being transported in a direction in which a plurality of hole-punching jigs (92) are lined up in a plan view.

[0111] According to this embodiment, the panel (10A) can be transported while being supported by the support roll (97), and multiple holes (70) can be formed in the panel (10A) with high precision. [Explanation of Symbols]

[0112] 1 Metal shell 2 Metal shell 4. Synthetic resin foam 70 holes 92 Drilling jig 93 Holder 95 Pressing part 97 Support Roles 900 Hole processing equipment 920 Insertion pins 921 Movable member 922 Fixing member 950 Slope 10A Panel 10B End face

Claims

1. A hole-making apparatus for forming holes in a panel having a synthetic resin foam between two metal outer shells, Multiple drilling jigs, The facility comprises a holder for holding the plurality of drilling jigs, Each of the aforementioned drilling jigs has an insertion pin that is inserted into the synthetic resin foam from the end face of the panel. The insertion pin is formed to be movable in the axial direction relative to the holder at a position facing the end face of the panel, The aforementioned multiple drilling jigs are arranged so as to be perpendicular to the axial direction of the insertion pin. Hole processing equipment.

2. The holder comprises an endless loop-shaped annular body, The aforementioned multiple drilling jigs are attached to the annular body, The annular body is formed to be rotatable in the direction in which the plurality of drilling jigs are aligned. The hole drilling apparatus according to claim 1.

3. Each of the aforementioned multiple drilling jigs comprises a movable member provided with the insertion pin and a fixed member held by the holder, The movable member is formed to be movable in the axial direction of the insertion pin relative to the fixed member, The system further includes a pressing part that presses the movable member to move the insertion pin in the axial direction relative to the fixed member. The hole drilling apparatus according to claim 1 or 2.

4. The pressing portion has an inclined portion in a plan view that contacts the movable member as it moves in a direction perpendicular to the axial direction of the insertion pin. The inclined portion is tilted with respect to the axial direction of the insertion pin in a plan view. The hole drilling apparatus according to claim 3.

5. In a plan view, the system further includes a support roll that contacts the panel being transported in the direction in which the plurality of drilling jigs are aligned. The hole drilling apparatus according to claim 1 or 2.

Images