JP2014141295A - Hollow structure panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hollow structure panel having a high flexural rigidity and impact resistance even it is lightweight.SOLUTION: A hollow structure panel 2 comprises: a plate-shaped hollow structure body 4; a first metal cover 6; and a second metal cover 8. The first metal cover 6 is formed by cutting out corner parts of a metal plate, folds first peripheral edge pieces 20 each between the adjacent corner parts for forming into a container shape. The second metal cover 8 is formed by cutting out corner parts of a metal plate, folds second peripheral edge pieces 26 each between the corner parts for forming into a container shape. In a state that the first metal cover 6 and the second metal cover 8 cover the hollow structure body 4, the first peripheral edge pieces 20, the second peripheral edge pieces 26, and corner members 10 are overlapped and engaged by using lock fittings 28.

Description

  The present invention relates to a hollow structure panel.

  Conventionally, wooden panels have been used as panels on which printing paper or the like can be placed. However, such a wooden panel has a problem that wood chips are generated during use, and a problem that the weight increases if necessary bending rigidity and impact resistance are ensured.

  In contrast, Patent Document 1 describes a metal hollow panel. This metal hollow panel is provided with a pair of plate-like metal members bent on four sides, and a pair of metal members are overlapped by press-fitting and engaging a bent piece of one metal member with the other metal member. The hollow panel is formed.

Japanese Patent Publication No.52-33851

  The above-described conventional metal hollow panel has a problem in impact resistance because there is a possibility that a part where the bent piece is press-engaged is released particularly when a compressive load is applied to the corner portion. In addition, there is a problem that the corners of the panel easily damage surrounding structures (walls, lines, etc.) and workers.

  The present invention has been invented in view of the above problems, and it is an object of the present invention to provide a hollow structure panel having no bending waste during use and having high bending rigidity and impact resistance even if it is lightweight. And Another object of the present invention is to effectively prevent the corners of the panel from damaging surrounding structures and workers.

  In order to solve the above problems, the present invention is a hollow structure having the following configuration.

  The present invention provides a plate-shaped hollow structure having a first plane and a second plane, a first metal cover that covers the first plane side of the hollow structure, and a second plane that covers the second plane side of the hollow structure. It is a hollow structure panel provided with 2 metal covers. The hollow structure has a first plane and a second plane facing away from each other, and has a side periphery between the first plane and the second plane. The first metal cover is formed by notching all corners of a single metal plate, providing a first peripheral piece between the cut corners, and bending the first peripheral piece vertically. . The second metal cover is formed by cutting out all corners of a single metal plate, providing a second peripheral piece between the cut out corners, and bending the second peripheral piece vertically. . With the first metal cover and the second metal cover being put on the hollow structure, the first peripheral piece and the second peripheral piece made of metal are overlapped with each other, and a locking tool attached from the outside is used. Thus, the first peripheral piece and the second peripheral piece located at the corner of the hollow structure are locked.

  In the present invention, the first peripheral piece and the first metal piece are provided with a corner member attached to the corner portion of the hollow structure body, and the hollow structure body is covered with the first metal cover and the second metal cover. Two peripheral pieces are overlapped on the side peripheral portion of the hollow structure, and a corner member is further covered with the first peripheral piece and the second peripheral piece, and using a locking tool attached from the outside, It is preferable that the first peripheral piece, the second peripheral piece, and the corner member are locked.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the hollow structure panel which does not produce wood waste at the time of use, and has high bending rigidity and impact resistance even if it is lightweight.

It is a whole perspective view of the hollow structure panel of one embodiment of the present invention. (A)-(d) is a principal part perspective view explaining in order the manufacturing process of the hollow structure used for the hollow structure panel same as the above. It is a top view of the metal plate which forms the 1st and 2nd metal cover used for the hollow structure panel same as the above. It is sectional drawing which shows the manufacturing process of a hollow structure panel same as the above. It is sectional drawing which shows the next manufacturing process of the hollow structure panel same as the above. It is principal part sectional drawing which shows the next manufacturing process of the hollow structure panel same as the above. It is a perspective view of the vacuum forming cover attached to the hollow structure panel same as the above. It is the perspective view which looked at the vacuum forming cover same as the above from the other direction. It is a principal part fracture perspective view of a vacuum forming cover same as the above. It is a schematic plan view which shows the metal mold | die for shape | molding the vacuum forming cover same as the above. (A)-(D) is a schematic plan view which shows the procedure which forms a support stand structure using the vacuum forming cover same as the above.

  The present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1 shows a hollow structure panel 2 according to an embodiment of the present invention. The hollow structure panel 2 uses a synthetic resin hollow structure 4 as a base, covers the hollow structure 4 with an aluminum first metal cover 6 and a second metal cover 8, and a resin corner member. The main body is configured by attaching 10 to the four corners.

  First, a plate-like hollow structure 4 will be described with reference to FIG. The hollow structure 4 includes a hollow core layer 106 made of resin, a first sheet 108, and a second sheet 110 (see FIG. 2D and the like). The hollow core layer 106 has a first skin surface on one side (lower side in the figure) in the thickness direction a, and has a second skin surface on the other side (upper side in the figure) in the thickness direction a. The first sheet 108 covers the entire first skin surface of the hollow core layer 106, and the second sheet 110 covers the entire second skin surface of the hollow core layer 106.

  The hollow structure 4 is formed into a plate shape by the steps shown in FIGS.

  As shown in FIG. 2A, vacuum forming is performed on a polypropylene sheet 100, and multiple rows of half honeycomb webs 102 and flat portions 104 are formed on the sheet 100.

  Next, as shown in FIG. 2 (b), the sheet 100 is folded in one direction so that each half honeycomb web 102 rises, and the adjacent adjacent half honeycomb webs 102 are in close contact with each other to form a continuous honeycomb. Combine to form a structure. At this time, the flat portions 104 between the adjacent half honeycomb webs 102 are alternately arranged on one side and the other side. Adjacent flat portions 104 are butted together to form a continuous skin surface.

  Here, as shown in FIG. 2C, the honeycomb-shaped hollow core layer 106 having a large number of hexagonal hollow portions 114 in plan view is formed by thermally welding the adjacent flat portions 104 to each other.

  Next, as shown in FIG. 2 (d), the first and second sheets 108 and 110 made of polypropylene are laminated on the first and second skin surfaces formed in the hollow core layer 106, A plate-like hollow structure 4 is formed.

  In the hollow structure 4 molded in this way, the hollow core layer 106 has a structure in which the internal space is partitioned into a honeycomb shape by a large number of partition walls 112 made of resin. A large number of partition walls 112 are formed so as to stand in the thickness direction a, and each space partitioned by the partition walls 112 becomes a hollow portion 114 having a hexagonal shape in plan view.

  In the hollow structure 4 having the above structure, as shown in FIGS. 4 to 6, the surface of the first sheet 108 attached to one side in the thickness direction a becomes the flat first plane 12. The surface of the second sheet 110 attached to the other side in the thickness direction a of the hollow structure 4 becomes a flat second plane 14.

  The hollow structure 4 has a very high strength per unit weight even in a thin plate shape, and is excellent in isotropy in mechanical properties. Furthermore, since the hollow structure 4 is made of a thermoplastic resin, it is excellent in secondary processability.

  The hollow core layer 106 is not limited to the above structure, for example, a hollow structure in which hollow portions are formed in a row like a harmonica hole by extrusion molding, a hollow structure in which a large number of columns and cylinders are arranged in parallel, etc. Other structures may be used. Furthermore, the hollow core layer 106 is not limited to resin, and other materials such as a paper honeycomb may be used.

  Alternatively, the hollow structure 4 may be formed with only the hollow core layer 106. In this case, the first skin surface of the hollow core layer 106 becomes the first plane 12, and the second skin surface becomes the second plane 14.

  Next, the 1st metal cover 6 and the 2nd metal cover 8 which cover the hollow structure 4 are demonstrated based on FIG. The first metal cover 6 and the second metal cover 8 are formed in substantially the same shape and size using aluminum. In FIG. 3, the metal plate 16 that forms the first metal cover 6 and the metal plate 22 that forms the second metal cover 8 are collectively shown.

  In the first metal cover 6, notches 18 that are notched in a square shape are provided at all four corners of the aluminum metal plate 16 that has a rectangular shape in plan view. One peripheral piece 20 is formed. The 1st peripheral piece 20 is an elongate thin-plate-shaped part which each follows the four sides which the metal plate 16 has in the outer periphery.

  In the first metal cover 6, the first peripheral pieces 20 formed at four locations are bent vertically in the same direction along folding lines indicated by dotted lines in the drawing. The adjacent first peripheral piece 20 is not overlapped because the notch 18 is positioned therebetween, but is positioned in a posture in which the end faces are attached to each other. Thus, the 1st metal cover 6 is formed in the container type | mold which has opening by bend | folding and raising the 1st peripheral piece 20 of four sides.

  The structure of the second metal cover 8 is the same as that of the first metal cover 6. In other words, in the second metal cover 8, the notch portions 24 that are notched in a square shape are provided at all four corners of the aluminum metal plate 22 that is rectangular in plan view, and between the notch portions 24 adjacent to each other. The second peripheral piece 26 is formed. The 2nd peripheral piece 26 is an elongate thin plate-shaped part which each follows the four sides which the metal plate 22 has in the outer periphery.

  Also in the second metal cover 8, the second peripheral pieces 26 formed at four places are bent vertically in the same direction along folding lines indicated by dotted lines in the drawing. The adjacent 2nd peripheral piece 26 is located in the standing posture which mutually attached end surfaces. In this way, the second metal cover 8 is formed in a container shape that is substantially the same size and the same size as the first metal cover 6 by bending the second peripheral piece 26 in four directions.

  Next, the corner member 10 further covered with respect to the first metal cover 6 and the second metal cover 8 will be described with reference to FIG. The corner member 10 is a resin member formed so that a pair of pieces are continuous in an L shape, and a pair of through holes 30 (see FIG. 6) for inserting the locking tool 28 from the outside are formed in each piece. To do. As the resin for molding the corner member 10, an elastomer is preferable, but polypropylene or the like can also be used. In addition, the corner member 10 can be made of metal in order to improve impact resistance.

  Next, the process of manufacturing the hollow structure panel 2 using each member mentioned above is demonstrated.

  First, the hollow structure 4 having the above structure is cut into a predetermined size and shape that is rectangular in plan view. At this time, the cut surface of the hollow core layer 106 having a honeycomb shape and the cut surfaces of the first and second sheets 108 and 110 are positioned on the side periphery of the cut hollow structure 4. On the cut surface of the hollow core layer 106, a large number of opening surfaces of the hollow portions 114 are formed via the partition walls 112.

  Therefore, the side periphery of the hollow structure 4 has an uneven shape in which a large number of hollow portions 114 and partition walls 112 are positioned along the peripheral direction. The side peripheral part which has this uneven | corrugated shape is formed between the mutual periphery of the 1st plane 12 and the 2nd plane 14 which are located in the thickness direction a and spaced apart.

  Next, an adhesive is applied to the first plane 12 and the second plane 14 of the hollow structure 4. Here, the hollow structure 4 is inserted into the first metal cover 6 through the opening of the first metal cover 6 formed in the container shape as described above, and the first plane 12 is made to pass through the first metal via the adhesive. Adhere to the inner bottom surface of the cover 6 (see FIG. 4). At this time, the four first peripheral pieces 20 of the first metal cover 6 are stacked on the side peripheral portion of the hollow structure 4 in close contact or substantially in close contact with each other.

  Next, the second metal cover 8 is further covered on the first metal cover 6 in which the hollow structure 4 is inserted. The first metal cover 6 and the hollow structure 4 are inserted into the second metal cover 8 through the opening of the container-shaped second metal cover 8 (see FIG. 5). The 2nd plane 14 which the hollow structure 4 has is adhere | attached on the inner bottom face of the 2nd metal cover 8 via an adhesive agent. At this time, the second peripheral piece 26 of the second metal cover 8 is overlapped with the first peripheral piece 20 of the first metal cover 6 on a one-to-one basis.

  That is, at this stage, the inner bottom surface of the first metal cover 6 is bonded to the first plane 12 of the hollow structure 4, and the inner bottom surface of the second metal cover 8 is bonded to the second plane 14 of the hollow structure 4, The second peripheral piece 26 and the first peripheral piece 20 are overlapped over the entire periphery of the side periphery of the hollow structure 4.

  Instead of directly applying an adhesive to the first plane 12 of the hollow structure 4, first, a non-woven fabric is attached to the first plane 12, and an adhesive is applied to the surface of the non-woven fabric so that the first metal cover 6 and It may be adhered. Similarly, a non-woven fabric may be first attached to the second plane 14, and an adhesive may be applied to the surface of the non-woven fabric to adhere to the second metal cover 8.

  Next, L-shaped corner members 10 are adhered to the four corner portions of the hollow structure 4 from the second peripheral piece 26, and temporarily fixed.

  At this time, one piece of the corner member 10 has one end portion of the second peripheral piece 26 and the end portion of the one first peripheral piece 20 that overlaps the one end portion of the second peripheral piece 26. Temporarily secured to the periphery. Similarly, the other piece of the corner member 10 has an end portion of the other second peripheral piece 26 adjacent to the second peripheral piece 26 and an end portion of the other first peripheral piece 20 overlapping therewith. And temporarily fixed to the side periphery of the hollow structure 4. It is also possible to temporarily fix without using an adhesive.

  Here, the first peripheral piece 20 and the second peripheral piece 26 are provided with through holes 32 and 34 communicating with the through holes 30 of the corner member 10 in a straight line, and through these series of through holes 30, 32 and 34, The locking tool 28 is inserted (see FIG. 6). The locking device 28 of the present embodiment is a blind rivet having a head portion 36 and a buckling portion 38, and the buckling portion 38 that extends radially inward of the first peripheral piece 20 is formed outward of the corner member 10. The first peripheral piece 20, the second peripheral piece 26, and the corner member 10 are sandwiched and fixed between the head portion 36 located at the position. At this time, the distal end portion and the buckling portion 38 of the locking tool 28 are located in the hollow portion 114 of the hollow structure 4.

  Each piece of the four corner members 10 is fixed to the first and second peripheral pieces 20, 26 by inserting a pair of locking tools 28, thereby overlapping at the side peripheral part of the hollow structure 4. Four sets of the first peripheral piece 20 and the second peripheral piece 26 are firmly fixed at both ends in the longitudinal direction of the respective pieces.

  Although not shown, the partition wall 112, the first peripheral piece 20, the second peripheral piece 26, and the corner member 10 can be sandwiched and fixed between the head portion 36 and the buckling portion 38 of the locking tool 28. is there.

  Further, the end portions of the first peripheral piece 20 and the second peripheral piece can be clamped and fixed with the same locking tool 28 without mounting the corner member 10. In this case, it is also possible to stick a corner member on the locking tool 28.

  Of course, when the corner member 10 is used as in the present embodiment, the advantage that the impact resistance of the hollow structure panel 2 is improved, particularly at the corner portion, and the corner portion of the hollow structure panel 2 is the surrounding area. There is an advantage that damage to the structure and the worker is prevented. The shape of the corner member 10 is not limited to the illustrated L shape, and for example, it may be a three-dimensional shape further including a triangular piece that covers the plane side of the hollow structure panel 2.

  As the locking tool 28, a member other than the blind rivet (for example, a nail or a U-shaped needle) can be driven.

  Further, a synthetic resin vacuum forming cover 40 as shown in FIGS. 7 to 9 is further provided on one side of the hollow structure panel 2 in which the hollow structure 4 is covered with the first metal cover 6 and the second metal cover 8. It is also possible to cover and fix, and to form a support base structure composed of the vacuum forming cover 40 on one side of the hollow structure panel 2.

  The vacuum forming cover 40 may be fixed to the surface of the hollow structure panel 2 on the first metal cover 6 side, or may be fixed to the surface of the second metal cover 8 side. In addition, when the vacuum forming cover 40 is fixed to the surface on the first metal cover 6 side, an end edge portion of the second metal cover 8 (particularly, a boundary portion between the second metal cover 8 and the first metal cover 6). Covering with a vacuum forming cover 40, when a hand touches this part, it can provide so that a level | step difference and an edge feeling may not be felt. When the vacuum forming cover 40 is fixed to the surface on the second metal cover 8 side, the bent portion of the periphery of the second metal cover 8 is positioned on the support base side (upper side), and this bent portion is Since it has a curved surface, it becomes easy to become familiar with the hand.

  Hereinafter, the structure of the illustrated vacuum forming cover 40 and a method of forming the support structure of the hollow structure panel 2 using the vacuum forming cover 40 will be described in detail.

  The vacuum forming cover 40 includes a flat part 42 made of a flat sheet and a plurality of elongated ridges 44 formed by deforming a part of the flat part 42 to one side. The length direction b of each elongated ridge 44 is parallel to the pair of end edges 48 of the flat portion 42 having a rectangular shape in plan view. The width direction c of each elongated ridge 44 is parallel to another pair of end edges 46 of the flat surface portion 42.

  Both ends 50 in the length direction b of each elongated protrusion 44 are both tapered. Both side surfaces in the width direction c of each end portion 50 that are tapered are tapered surfaces that are inclined so as to approach each other as they approach the tip end side. The front end surface of each end portion 50 is a flat surface provided so as to be located on the same or substantially the same line as the end edge 46 of the flat surface portion 42 in plan view.

  By attaching this vacuum forming cover 40 to one surface side of the hollow structure panel 2, an uneven support base structure composed of a plurality of elongated protrusions 44 can be added to the one surface side of the hollow structure panel 2.

  The hollow structure panel 2 to which the vacuum forming cover 40 is attached can be suitably used as, for example, a pallet for paper conveyance used in a printing process. According to this pallet, a large number of sheets are inserted or placed in a U-shaped or L-shaped clamp (not shown) in a state where a large number of sheets are placed on the plurality of elongated ridges 44. Paper can be transported together with the pallet.

  At this time, since the front end surface of each end 50 of the elongated ridge 44 is on the same line as the edge of the hollow structure panel 2, it is also possible to prevent the paper placed on the elongated ridge 44 from drooping on the end side. Is done.

  Furthermore, by using a plurality of claws (not shown) such as a forklift, the claws are inserted into a groove between adjacent elongated ridges 44 and lifted, whereby the paper laminated on the plurality of elongated ridges 44 is palletized. It can be transported away from.

  By the way, in order to reduce the weight of the hollow structure panel 2, it is preferable to provide the first metal cover 6 and the second metal cover 8 thinly. However, when the metal cover on the side to which the vacuum forming cover 40 is not fixed is provided thin, this portion is weak against impact.

  For example, when the vacuum forming cover 40 is fixed to the second metal cover 8 and the first metal cover 6 located on the opposite side of the vacuum forming cover 40 is thinly provided, the first metal cover 6 becomes weak against impact, It becomes easy to dent. When this hollow structure panel 2 is conveyed by a roller conveyor with the vacuum forming cover 40 facing up, if the first metal cover 6 serving as the bottom surface of the hollow structure panel 2 is thin, the bottom surface tends to be dented due to impact or the like. This causes trouble when transported by a conveyor. For this, it is preferable to attach a lightweight plate made of synthetic resin to the outer bottom surface of the first metal cover 6.

  That is, when the hollow structure panel 2 to which the vacuum forming cover 40 is attached is used for a pallet that is conveyed by a roller conveyor, the vacuum forming cover 40 is fixed out of the first metal cover 6 and the second metal cover 8. It is preferable that both the weight reduction and the strength are achieved by providing a thin metal cover opposite to the side and sticking a resin plate to the thin metal cover.

  The vacuum forming cover 40 is manufactured by vacuum forming using a synthetic resin sheet having a thickness of 2 mm, for example. Therefore, the vacuum formed cover 40 has a shape in which a large number of elongated ridges 44 project from the flat surface portion 42 on one surface side, and a large number of elongated ridges 52 are recessed from the flat surface portion 42 on the other surface side. (See FIGS. 8 and 9). The elongated groove 52 has a front and back relationship with the elongated protrusion 44, and both end portions in the length direction b have a tapered shape in which the opening width becomes narrower toward the distal end side.

  The vacuum forming cover 40 can be formed in a plurality of sizes in the length direction b using a mold 60 as schematically shown in FIG.

  The vacuum forming mold 60 includes a main mold 62 that is a basic mold, a sub mold 64 that is used in combination with the main mold 62, and a nested mold 66 that is inserted between both molds 62 and 64. With. The nesting die 66 is an added portion between the dies 62 and 64, and the nesting die 66 is preferably provided in a plurality of types of dimensions.

  Of the molds 60, the main mold 62 is composed of one end 50 of the long rows of elongated ridges 44, a straight portion of the elongated ridges 44 continuous from each end 50, and a plane portion 42 corresponding thereto. This part is a part that is vacuum formed integrally.

  The insert mold 66 arranged continuously with the main mold 62 in the length direction b includes an extension region of the straight portions of the multiple rows of elongated protrusions 44 and an extension region of the plane portion 42 in the length direction b. Is a part that is vacuum formed integrally.

  The sub metal mold 64 is a part that integrally vacuum-forms the tip part including the other end part 50 and the edge part of the flat part 42 corresponding to the other end part 50 of the multiple rows of elongated ridges 44.

  In the example shown in FIG. 10, the maximum size mold 60 is assembled by interposing six nested molds 66 between the main mold 62 and the sub mold 64. The six nesting dies 66 have four nesting dies 66 having the smallest dimension in the length direction b, and one nesting mold 66 having a larger dimension in the length direction b. There is one nested mold 66 having a dimension in the length direction b larger than that.

  By interposing an appropriate one of these nested molds 66, it is possible to mold with various sizes of the mold 60, and the size of the mold 60 can be easily changed. It is also possible to assemble the mold 60 of the minimum size by continuing the main mold 62 and the sub mold 64 without interposing the insert mold 66. By the combination of these dies 62, 64, 66, the dimension in the length direction b of the vacuum forming cover 40 to be molded can be selected at a pitch of about 50 mm within a range of 500 mm to 850 mm, for example.

  The vacuum forming cover 40 that is vacuum-formed by the mold 60 is provided with convex or concave streaks (not shown) of about 0.5 mm over the entire length in the width direction c. The streaks include a boundary line portion between the main mold 62 and the nested mold 66 adjacent thereto, a boundary line portion between the adjacent molds 66 adjacent to each other, and the nested mold 66 and the same. It is formed at a boundary portion between the adjacent sub molds 64 or at a boundary portion between the main mold 62 and the sub mold 64 adjacent thereto.

  Since these streaks are visible, they can be used as positioning lines when paper or the like is placed on the vacuum forming cover 40 on the one surface side of the hollow structure panel 2.

  That is, in this example, the vacuum forming cover 40 can be formed in various sizes by combining the plurality of molds 62, 64, 66 and the vacuum forming mold 60 is provided, and the placement object is positioned. The line is provided so as to be formed on one side. Concerning the formation of the line serving as the positioning line, it is possible to form a convex or concave line by providing a concave line or a convex line on an appropriate mold 62, 64, 66. It is not necessary to form the lines serving as the positioning lines in the vacuum forming cover 40.

  FIG. 11 shows a procedure for forming a pallet support base structure in various sizes in the width direction c using the vacuum forming cover 40 formed as described above. In this example, by combining two vacuum forming covers 40 of the same size and the same shape, a support base structure larger than the single vacuum forming cover 40 in the width direction c is formed.

  Both end portions in the width direction c of the vacuum forming cover 40 are constituted by both end portions 68 and 70 in the width direction c of the flat portion 42. The dimension in the width direction c is different between one end portion 68 and the other end portion 70 in the width direction c of the flat portion 42.

  Of the two end portions 68 and 70, the end portion 68 on the narrow side has its dimension in the width direction c set to half of the distance between the elongated ridges 44 adjacent to each other. Here, the distance between the elongated ridges 44 is the width dimension of the groove portion formed between the elongated ridges 44.

  Of the two end portions 68, 70, the end portion 70 on the wide side is set to have a dimension in the width direction c sufficiently larger (for example, about twice) than the distance between the elongated ridges 44 adjacent to each other. Yes. The wide end portion 70 is an adjustment margin for adjusting the dimension of the vacuum forming cover 40 in the width direction c, and a cut reference position is provided in the end portion 70. The wide end portion 70 can be used as an insertion portion when the pallet is inserted into the U-shaped clamp portion. The width of the end portion 70 is set corresponding to the width of the clamp portion.

  In the procedure of FIG. 11, as shown in (A) and (B), a pair of vacuum forming covers 40 of the same size are prepared, and each vacuum forming cover 40 is cut at two points along the length direction b.

  Specifically, the groove portion between the predetermined elongated ridges 44 of both vacuum forming covers 40 is cut by a cutting line L1 set at an intermediate point in the width direction c of the groove portion, and the wide groove The end portion 70 is cut by a cutting line L2 set so as to leave only a predetermined dimension. The vacuum formed cover 40 after cutting the two places is ½ size of one surface of the hollow structure panel 2 to which it is fixed.

  Next, as shown in (C) and (D), in the state where the cut edges 72 of the two vacuum forming covers 40 cut along the cutting line L1 are butted together, Secure to. For fixing the vacuum forming cover 40, for example, double-sided tape or rivets are used.

  In the example of FIG. 11, the pair of vacuum forming covers 40 is cut along the cutting line L1 and the cutting edges 72 are attached to each other, but the one vacuum forming cover 40 is not cut along the cutting line L1. It is also possible to leave the end portion 68 and set the edge of the end portion 68 so as to abut against the cutting edge 72 of the other vacuum forming cover 40. It is also possible to leave the narrow end portions 68 in both the vacuum forming covers 40 and set the edges of the end portions 68 to face each other.

  Further, in the example of FIG. 11, the support base structure is formed by combining two vacuum forming covers 40 of the same size, but two vacuum forming covers 40 having different dimensional shapes may be combined, or The support base structure may be formed by a single vacuum forming cover 40.

  According to the above-described vacuum forming cover 40 made of synthetic resin, the support structure of the pallet can be formed with light weight and high strength, and the vacuum forming cover 40 can be used in forming the support structure with various sizes. There is no need to prepare a large number of molds for molding the mold. For this reason, the cost for manufacturing the mold is reduced, and the space for storing the mold is saved.

  By the way, it is also possible to further provide a reinforcing structure at the end 50 of each elongated protrusion 44 of the vacuum forming cover 40 forming the support base structure. This reinforcing structure is a structure that prevents the end portion 50 of each elongated ridge 44 from being crushed when the hollow structure panel 2 is pushed and moved with a hand or a foot, thereby facilitating the moving operation.

  As a reinforcing structure, for example, a separate rectangular flat plate (not shown) is attached to one end edge 46 in the length direction b of the hollow structure panel 2 over the entire region or a partial region in the width direction c. This flat plate covers one end 50 of each elongated ridge 44.

  Providing this reinforcing structure is particularly preferable when the hollow structure panel 2 having a support base structure is used as a pallet for paper conveyance and the pallet is moved by hand or foot. The width of the paper laminated on the support base structure is usually smaller than the width of the vacuum forming cover 40 forming the support base structure. This paper is stacked so as to be aligned with the other edge 46 in the length direction b of the vacuum forming cover 40 (that is, the edge 46 on the side where the flat plate is not attached). And paper is conveyed with the pallet by pushing this flat plate with a hand or a foot.

  As described above, since the vacuum formed cover 40 is formed by vacuum forming a synthetic resin sheet having a thickness of about 2 mm, the end portion 50 of the elongated protrusion 40 has a thickness of about 0.5 to 1.0 mm. The strength of the portion 50 is difficult to provide. For this reason, there is a possibility that the end 50 is crushed when directly pressed with a hand or foot. However, if the end 50 is covered with a flat plate and the pallet is moved by pressing the flat plate, the end 50 is prevented from being crushed. In addition, moving work becomes easy.

  As another example of the reinforcing structure, it is also preferable to add a reinforcing material in each elongated recess 52 (particularly the end of each elongated recess 52) on the back side of each elongated protrusion 44. This reinforcing material is a synthetic resin, preferably a foamed synthetic resin. The addition of the reinforcing material may be performed by attaching a separate part constituting the reinforcing material into each elongated groove 52 or may be performed by injecting the reinforcing material into each elongated groove 52. According to this structure, even when the pallet is moved while directly pushing the end 50 of each elongated ridge 40, the end 50 is prevented from being crushed.

  Moreover, in the vacuum forming cover 40 of this example, although the side peripheral wall is not extended from the periphery of the plane part 42, a side peripheral wall is extended in the orthogonal direction from the periphery of the plane part 42, and the whole is formed in a container shape. It is also possible.

  At this time, a through hole into which the locking tool 28 is inserted is provided in the side peripheral wall. And after mounting this vacuum forming cover 40, the corner member 10 is piled up on the side peripheral wall of the vacuum forming cover 40, and the locking tool 28 is inserted, thereby the first peripheral piece 20, the second peripheral piece 26, and the side. The peripheral wall and the corner member 10 may be fixed. Further, the first peripheral piece 20, the second peripheral piece 26, and the side peripheral wall can be fixed by inserting the locking tool 28 without mounting the corner member 10.

  As described above with reference to the accompanying drawings, the hollow structure panel 2 of the present embodiment includes a plate-like hollow structure 4 having a first plane 12 and a second plane 14, and a first plane of the hollow structure 4. The first metal cover 6 is placed on the 12 side, and the second metal cover 8 is placed on the second plane 14 side of the hollow structure 4. The hollow structure 4 has a first plane 12 and a second plane 14 facing away from each other, and a side peripheral portion between the first plane 12 and the second plane 14. The first metal cover 6 is formed by cutting out all the corners of a single metal plate 16, providing a first peripheral piece 20 between the cut-out corners, and bending the first peripheral piece 20 vertically. It is a thing. The second metal cover 8 is formed by cutting out all the corners of a single metal plate 22, providing a second peripheral piece 26 between the cut out corners, and bending the second peripheral piece 26 vertically. It is a thing. In a state where the first metal cover 6 and the second metal cover 8 are put on the hollow structure 4, the first peripheral piece 20 and the second peripheral piece 26 made of metal are overlapped and attached from the outside. The first peripheral piece 20 and the second peripheral piece 26 located at the corners of the hollow structure 4 are locked using the locking tool 28.

  Therefore, according to the hollow structure panel 2 of the present embodiment, wood chips are not generated at the time of use unlike a wooden panel, and even if it is light, it has high bending rigidity and impact resistance. In particular, since the first peripheral piece 20 and the second peripheral piece 26 are fixed by the locking tool 28 at the corner portion of the panel, even if a large compressive load is applied to the corner portion, the breakage occurs. Is effectively prevented.

  Furthermore, the hollow structure panel 2 of the present embodiment includes a corner member 10 that is attached to a corner portion of the hollow structure 4. And the 1st peripheral piece 20 and the 2nd peripheral piece 26 which are the metal made in the state which covered the 1st metal cover 6 and the 2nd metal cover 8 on the hollow structure 4 are the side peripheral parts of the hollow structure 4 The first peripheral piece 20 and the second peripheral piece 26 are further covered with the corner member 10, and the first peripheral piece 20 and the second peripheral piece 20 are connected to each other by using a locking tool 28 that is mounted from the outside. The peripheral piece 26 and the corner member 10 are locked at the side peripheral portion of the hollow structure 4.

  Therefore, according to the hollow structure panel 2 of the present embodiment, the impact resistance particularly at the corner portion is further enhanced, and the corner portion of the hollow structure panel 2 may damage surrounding structures and workers. Is prevented.

  As mentioned above, although this invention was demonstrated based on embodiment shown to an accompanying drawing, this invention is not limited to the said embodiment. Within the range intended by the present invention, appropriate design changes can be made.

2 Hollow structure panel 4 Hollow structure 6 First metal cover 8 Second metal cover 10 Corner member 12 First plane 14 Second plane 16 Metal plate 18 Notch portion 20 First peripheral piece 22 Metal plate 24 Notch portion 26 Second periphery Piece 28 Locking tool

Claims (2)

A plate-like hollow structure having a first plane and a second plane;
A first metal cover that covers the first plane side of the hollow structure;
A hollow structure panel comprising a second metal cover that covers the second plane side of the hollow structure,
The hollow structure has a first plane and a second plane facing away from each other, and has a side periphery between the first plane and the second plane,
The first metal cover is formed by cutting out all corners of a single metal plate, providing a first peripheral piece between the cut out corners, and bending the first peripheral piece vertically. ,
The second metal cover is formed by cutting out all corners of a single metal plate, providing a second peripheral piece between the cut out corners, and bending the second peripheral piece vertically. ,
With the first metal cover and the second metal cover being put on the hollow structure, the first peripheral piece and the second peripheral piece made of metal are overlapped with each other, and a locking tool attached from the outside is used. The hollow structure panel is characterized in that the first peripheral piece and the second peripheral piece located at the corners of the hollow structure are locked. Comprising a corner member to be attached to the corner of the hollow structure;
In a state where the first metal cover and the second metal cover are put on the hollow structure, the first peripheral piece and the second peripheral piece made of metal are overlapped on the side peripheral portion of the hollow structure, and the first peripheral edge The corner member is further covered with the piece and the second peripheral piece, and the first peripheral piece, the second peripheral piece, and the corner member are locked using a locking tool attached from the outside. The hollow structure panel according to claim 1, wherein the panel is a hollow structure panel.

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