JP2010143018A - Panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress warpage occurring in a panel using cardboard as a substrate and the use of an adhesive. <P>SOLUTION: A plurality of shaft-like core materials 3 are inserted into the space between the liners 4a and 4b of flat cardboard 1. A vertical holding frame 5 with a U-shaped cross section is engaged with the vertical edge 11 of the cardboard 1 faced with ends 3a and 3b of the core material 3 and fixed. The degree of adhesion to one of the liners 4a and 4b and an inside core 2 of the ends 3a and 3b of the core material 3 is increased by the elastic force of the vertical holding frame 5. As a result, the warpage occurring in the cardboard 1 is suppressed by the rigidity of the vertical holding frame 5 and the core material 3. When a glass fiber-made core material is used as the core material 3, it is confirmed that a favorable result is obtained. Glass fibers are light in weight, high in rigidity, and excellent in heat resistant performance to be effective to suppress the warpage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a panel as various office supplies such as a so-called “whiteboard”, or various display panels / decorative panels displayed / displayed indoors / outdoors, particularly along the inner surface of an automobile windshield. It relates to various panels such as “price card”.

  For example, in the case of a “white board”, this type of conventional panel has a front surface and a rear surface with respect to a board made of a synthetic resin board or a wooden board such as OSB, particle board, or MDF. In general, an exterior material made of a synthetic resin plate or sheet covering the substrate is laminated by adhesion or the like.

  Characters, lines, figures, patterns, etc. necessary for the function of the whiteboard are drawn on the exterior material, and the surface can be written with a predetermined writing instrument, and the written contents can be erased. ing. In addition, when the magnet is attracted by magnetic force, a magnetic material such as an iron plate is also laminated inside the exterior material.

  Also, panels for other applications use synthetic resin boards, wooden boards, metal boards, etc. as substrates, and exterior materials are laminated on the front and back surfaces of the boards. There are many things. The exterior material plays a role of design with characters, lines, figures, patterns, etc. drawn on the surface as well as protecting the substrate

  Further, there are some which use corrugated cardboard as a substrate to reduce the weight of the panel (see, for example, Patent Document 1 and Patent Document 2).

JP-A-9-175085 Japanese Utility Model Publication No. 6-17927

  However, this type of panel has a problem of heavy weight because the substrate is composed of a synthetic resin plate, a wooden plate, a metal plate, or the like as described above. For this reason, there is a problem that it is inconvenient to carry. In addition, the use of these materials is a cause of high costs.

  In this respect, a panel using corrugated cardboard as a substrate has been reduced in weight, is convenient to carry, and can be said to be excellent in terms of cost.

  However, since the corrugated cardboard is made of paper, there is a problem that warping occurs over time. When the substrate is warped, it is no longer easy to continue using it as a panel. In particular, “price cards” for automobiles used outdoors are exposed to direct sunlight for a long time, and it has been practically difficult to use cardboard as a substrate.

  Also, if the materials constituting the substrate or the substrate and the synthetic resin of the exterior material are laminated using an adhesive, it becomes difficult to use the component materials for recycling after the use as a panel is finished. There is a problem of becoming. This is because the synthetic resin material cannot be brought into the regeneration process when the adhesive is attached.

  Therefore, the present invention has a first problem of suppressing warpage generated in a panel using corrugated cardboard as a substrate, and a second problem of suppressing the use of an adhesive.

  In order to solve the above-mentioned problems, the present invention provides a core by attaching an axial core material along a direction in which the wave of the core of a flat corrugated board having a liner and a core extends. The rigidity of the material suppresses the warpage generated in the corrugated board.

As this core material, it has been confirmed that when a glass fiber is used, good results are obtained. Glass fiber is lightweight and has high rigidity (strong waist), excellent heat resistance, and is effective in suppressing warpage.
As the glass fiber core material, for example, a glass solid obtained by hardening glass fibers with a thermosetting resin such as an epoxy resin or a polyester resin can be used. The glass solid may be one in which the inside is densely packed, or in addition, for example, may be a cylindrical one in which a hollow portion is interposed inside. Moreover, it replaces with glass fiber and the thing using a carbon fiber etc. can be considered, for example. It is preferable that the material constituting the core material has a high heat resistant temperature.

This core material can be configured to be inserted into the gap between the liner of the corrugated board and the middle core. In this way, the core material can be easily fixed to the corrugated board.
At this time, it is desirable that the outer diameter of the core material is set to such a dimension that the core member does not move in close contact with the inner surface of the space.

As this corrugated board, for example, a single-sided cardboard in which a core is disposed on one side of a single liner, a double-sided cardboard in which a single-layer core is disposed between a front-side liner and a back-side liner, or a liner Various cores having a plurality of cores as a whole can be adopted by laminating and stacking the cores and the cores alternately or in the required order.
These materials can be selectively employed according to the use of the panel. However, as a substrate used for a general panel, it is desirable to use a double-sided cardboard in which each of the front and back surfaces is formed flat.

  Further, when the core material is inserted into the space in the corrugated board as described above, at least one end portion in the axial direction of the core material is tapered, and the core material is inserted into the gap from the one end portion. It can be set as the structure which becomes. If the end of the core is tapered, insertion is easy. In particular, in the case of glass fiber, the end of the glass fiber slides on the inner surface of the corrugated cardboard when inserted, and the tip of the glass fiber is caught on the inner surface of the corrugated cardboard, so that the tip cracks (a state in which the tip is branched and separated) is likely to occur. Therefore, it is advantageous to adopt such a tapered form.

  In each of these configurations, a plurality of the core members can be inserted into one corrugated board. At this time, the vertical end edge of the corrugated board on the side where the end portions of the plurality of core members face, a base portion extending along the vertical end edge, and a pair extending from the base portion in a direction along the front and back outer surfaces of the corrugated board plate A vertical holding frame having a U-shaped cross section having a sandwiching piece is fitted and fixed, and the end portions of the plurality of core members are caused by an elastic force in a direction in which the sandwiching pieces of the vertical holding frame approach each other. In addition, the degree of adhesion between either of the liners and the core may be increased.

  In this way, the vertical holding frame restrains the ends of the plurality of core members arranged in parallel on the same straight line along the vertical holding frame, so that the warpage occurring in the corrugated board can be more effectively suppressed. . In particular, it is possible to effectively suppress warping that may occur in the vertical direction (direction perpendicular to the direction in which the core wave extends).

  At this time, if the end portions of the plurality of core members are located between the sandwiching pieces of the pair of the vertical holding frames, each end portion is easily constrained on the same straight line. Even if the end portion is not necessarily located between the pair of sandwiching pieces, if the vertical holding frame is fitted to the end edge of the corrugated board, the core material located near the end edge through the material of the corrugated board In addition, since the restraining force is transmitted, a predetermined warpage suppressing effect can be exhibited.

Further, in each of these configurations, the end portion of the core member is located on the inner side by a predetermined distance from the vertical edge of the corrugated board, and the predetermined distance is determined during the use period in the usage state of the panel. It can be set as the structure set larger than the assumed shrinkage | contraction amount in the position of the said vertical end edge which may arise in a corrugated board board.
In this way, it is possible to prevent the core material from protruding from the edge of the corrugated board when shrinkage deformation occurs in the corrugated board due to aging or the like. This is because when the core member protrudes from the end edge of the corrugated board, the vertical holding frame fitted into the end edge causes shakiness.

  A holding frame can also be fitted to the other edge of the corrugated board. That is, when the outer shape of the corrugated board is rectangular in plan view, a pair of edges extending in the direction along the front and back outer surfaces of the corrugated board from the base at the lateral edge of the corrugated board and the lateral end of the corrugated board. A horizontal holding frame having a U-shaped cross section having a sandwiching piece is fitted and fixed.

Also, the corner portion of the corrugated board has an L-shaped base in plan view along the vertical edge and the lateral edge, and opposing sandwiching pieces extending from the base in a direction along the front and back outer surfaces of the corrugated board. A U-shaped reinforcing member is fitted and fixed, and the reinforcing member connects the holding pieces of the vertical holding frame and the holding pieces of the horizontal holding frame from the outside in the thickness direction of the corrugated board respectively. It is possible to adopt a configuration having a function of pressing to the surface.
In this way, the vertical holding frame and the horizontal holding frame can be prevented from falling off, and the reinforcing member complements the elastic force of the pair of holding pieces in the vertical and horizontal holding frames, and the corrugated board is formed by the vertical and horizontal holding frames. The pressing force (insertion force) can be strengthened.

Further, a groove extending from the leading edge of the sandwiching piece toward the base is formed on the inner surface of any of the sandwiching pieces of the reinforcing member, and the reinforcing member is formed by the adhesive force of the adhesive adhered in the groove. It is possible to adopt a configuration in which it is fixed so as not to fall off.
In this way, the adhesive easily stays in the groove, so that the adhesion of the adhesive is limited to a certain area. For this reason, it is easy to remove the adhesive during recycling. Further, if the adhesion of the adhesive is limited to the inside of the groove, when the panel is disassembled, the bonding portion can be easily separated by inserting a jig such as a screwdriver along the groove.

The outer surface on the front side of the corrugated board is covered with an exterior sheet made of a single material or a plurality of materials selected from a heat resistant resin sheet, a heat resistant resin film, or a heat resistant nonwoven fabric, and the exterior sheet is on the back side. It is possible to adopt a configuration in which the folded portion is folded and pressed by the reinforcing member via the vertical holding frame and / or the horizontal holding frame.
If the exterior sheet, that is, the exterior material is sandwiched and fixed between the vertical and horizontal holding frames and the reinforcing member, the use of the adhesive can be suppressed. Further, by sandwiching an exterior sheet made of resin or the like, an effect of stabilizing the pressing force (fitting force) on the corrugated board by the vertical and horizontal holding frames can be expected. Rather than the case where the holding pieces of the vertical and horizontal holding frames touch the outer surface of the cardboard directly, the frictional force increases when the thin inclusions such as the outer sheet are sandwiched, causing the vertical and horizontal holding frames to fall off. Because it makes it difficult.

  Further, on the outer surface of the back side of the corrugated board, the inner side of the inner edges of the vertical holding frame and the horizontal holding frame is covered with a protective plate, and a thin plate-like locking plate is provided on the surface of the protective plate on the corrugated board side. It is possible to adopt a configuration in which the fixing plate is fixed and pressed by the reinforcing member via the vertical holding frame and / or the horizontal holding frame.

If the corrugated board is exposed on the back side of the panel, the appearance and appearance of the panel will be deteriorated, resulting in a problem of inferior luxury, so the corrugated board is not exposed or its exposed area Is desirable to be small. For this reason, there is also means for extending the exterior sheet covering the front side to the back side and covering the back side of the panel.
However, by attaching the protective plate to the back surface as described above, the appearance problem can be solved, and at the same time, the rigidity of the protective plate itself can contribute to the suppression of the warpage of the cardboard plate.

The protective plate may be fitted and fixed to the vertical holding frame and the horizontal holding frame. However, since the protective plate has a certain thickness unlike the sheet, it is not fixed by fitting into the vertical holding frame and the horizontal holding frame, but a thin locking plate attached to the protective plate is held vertically. It is preferable to sandwich the frame and the horizontal holding frame and to fix the vertical holding frame and the horizontal holding frame by pressing the reinforcing member. The protective plate and the locking plate may be fixed with, for example, a pin or a staple needle, or may be fixed with a minimum necessary adhesive.
In addition, if a member having elasticity as this protective plate, for example, a polystyrene foam plate, is used, especially when a panel such as a whiteboard is suspended from a wall surface, the protective plate is used as a cushioning material between the wall surface and the panel. Can function as.

  In addition, when the use of the panel is a whiteboard, the exterior sheet can be configured to have a surface corresponding to a white boat that can be written with a predetermined writing tool and the written content can be erased. . In addition, when the use of the panel is a price card posted along the inner surface of the windshield of the automobile, the exterior sheet may have a design corresponding to the price card. Thus, the exterior sheet | seat can be employ | adopted according to the use of the panel.

  Since this invention was made as mentioned above, the curvature which arises in the panel using the cardboard as a board | substrate can be suppressed, and use of an adhesive agent can be suppressed.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall view of the panel P of this embodiment. FIG. 2 is an exploded view thereof.

  This panel P uses a corrugated board 1 made of flat double-sided corrugated board with a corrugated core 2 between two liners 4 (front liner 4a and back liner 4b) as a substrate. In this embodiment, a rectangular corrugated board 1 in plan view is used for a rectangular panel.

  A glass fiber shaft-shaped core material 3 is inserted into the corrugated board 1. Since the core material 3 is inserted into the gap e between the liner 4 and the core 2, the core material 3 is attached along the direction in which the corrugated wave of the core 2 extends.

  The core material 3 is a glass solid obtained by hardening a glass fiber core material with a resin, and has a heat resistant temperature of about 800 ° C. The core material 3 has a rigidity capable of suppressing warpage generated in the corrugated board 1.

  Further, as shown in FIG. 2, the core material 3 has one end 3a in the axial direction tapered. Insertion is easy because the taper is inserted into the gap e from one of the tapered end portions 3a, and the tip end of the glass fiber is not caught on the inner surface of the corrugated cardboard so that the tip crack does not occur.

  A plurality of the core members 3 are inserted into one corrugated board 1. In the example of FIG. 2, a total of five are inserted, but the number can be freely set.

The outer surface of the liner 4a on the front side of the corrugated board 1 is coated with a heat-resistant first exterior sheet 10a (NI-Teijin RT-0111 film bonded product / heat-resistant temperature 200 ° C.) and a second exterior sheet 10b (heat-resistant PET). / Heat-resistant temperature 150 ° C.)
In this embodiment, the two exterior sheets 10a and 10b are used as the exterior sheet 10 covering the corrugated board 1. However, the present invention is not limited to this material, and the resin sheet, the resin film, the nonwoven fabric, or other A sheet-like material made of a material may be used as the exterior sheet 10. Further, the exterior sheet 10 may be composed of one sheet-like material, or may be used by combining two, three, or more sheet-like materials.

The exterior sheet 10 composed of the first exterior sheet 10 a and the second exterior sheet 10 b is folded back to the back side of the corrugated board 1. At this time, as shown in FIG. 3, the folding pieces 10c provided in the respective exterior sheets 10a and 10b are folded back via the crease line r.
At this time, since the double-sided tape 10e is provided as an adhesive means in the middle folded piece 10c of the second exterior sheet 10b, the folded piece 10c is placed on the liner on the back side of the corrugated board 1 by the double-sided tape 10e. Bonded to 4b and temporarily fixed.
Moreover, the hole part 10d is provided in the folding piece 10c of the both ends side of said 2nd exterior sheet | seat 10b. When the folded piece 10c of the first exterior sheet 10a is folded, the double-sided tape 10e as the adhesive means provided on the folded piece 10c of the first exterior sheet 10a passes through the hole 10d and the back side of the corrugated board 1 It is adhered and temporarily fixed to the liner 4b.

  Thus, after covering the corrugated board 1 with the exterior sheet 10, the vertical end edges 11 on both sides of the corrugated board 1 (that is, the edges on the side facing the axial end portions 3 a and 3 b of the core member 3). Each of the vertical holding frames 5 made of metal is fitted and fixed. The vertical holding frame 5 includes a base 5b along the vertical edge 11 of the corrugated board 1 and a pair of sandwiching pieces 5a and 5a extending from the base 5b in a direction along the front liner 4a and the back liner 4b of the corrugated board 1. And has a U-shaped cross section.

  Further, a horizontal holding frame 15 made of metal is fitted and fixed to each of the horizontal end edges 12 extending in a direction parallel to the axial direction of the core member 3. The horizontal holding frame 15 includes a base portion 15b along the horizontal edge 12 of the corrugated board 1, and a pair of sandwiching pieces 15a and 15a extending from the base portion 15b in a direction along the front liner 4a and the back liner 4b of the corrugated board 1. And has a U-shaped cross section.

At this time, the folded portion of the exterior sheet 10 is fixed by being sandwiched between the horizontal holding frames 15 as shown in FIG. In other words, the folded portion presses and holds the exterior sheet 10 against the corrugated board 1 by the elastic force in the direction in which the holding pieces 15a, 15a of the lateral holding frame 15 approach each other.
The outer sheet 10 is held by the vertical holding frame 5 by providing the folded pieces 10c of the first outer sheet 10a and the second outer sheet 10b on the vertical edge 11 side of the corrugated board 1 as well. You can also. Further, the folded portion of the exterior sheet 10 may be held by only one of the horizontal holding frame 15 and the vertical holding frame 5. Further, the material of the horizontal holding frame 15 and the vertical holding frame 5 is not limited to metal, and for example, a resin-made one may be used.

  In this embodiment, as shown in FIG. 2, a thin iron plate 13 is interposed between the liner 4 a on the front side of the corrugated board 1 and the exterior sheet 10. In this embodiment, a thickness of 0.1 mm is adopted, but the thickness and material can be selected as appropriate. Moreover, the fixing method to the corrugated board 1 uses the double-sided tape or the minimum necessary adhesive as the fixing means 13 a in a spot manner over several places on the surface of the iron plate 13. For this reason, after the use of the panel P is finished, those double-sided tapes and adhesives can be easily removed during recycling. The iron plate 13 is interposed when it is necessary to attract a magnet to the surface of the panel P. If there is no need to attract a magnet to the surface of the panel P, it may be omitted.

  Further, as a fixing method of the iron plate 13, for example, when the iron plate 13 is thin and can be bent, the iron plate 13 is folded back like the exterior sheet 10 and the folded portion is set to the holding frames 5. , 15 or the like, and a fixing method other than an adhesive may be employed.

  Further, with respect to the vertical holding frame 5, as shown by an arrow b in FIG. 6B, by inserting the vertical holding frame 5, both end portions 3a and 3b of the plurality of core members 3 are shown in the same arrow. They are restrained on the same straight line in the direction indicated by c. For this reason, especially with respect to the curvature (warp of the arrow a direction of Fig.6 (a)) which may arise in the vertical direction of the cardboard board 1, the curvature can be suppressed effectively.

That is, as indicated by an arrow d in FIG. 7 (b), the front side liner 4a and the back side liner 4b are moved by the elastic force in the direction in which the holding pieces 5a, 5a of the vertical holding frame 5 approach each other. It is pushed in the direction approaching each other. As shown by an arrow e in the figure, this pressing force acts from the front side liner 4a and the back side liner 4b toward both ends 3a and 3b of the core 3 slightly inside from the point of action of the arrow d. . This is because the binding force is transmitted to the core member 3 located in the vicinity of the vertical holding frame 5 through the material of the corrugated board 1.
As a result, the degree of adhesion between the outer peripheral surfaces of both end portions 3a and 3b of each core member 3, the front side liner 4a or the back side liner 4b, and the center core 2 is enhanced to exhibit a certain restraining force, and warp. The effect of prevention is enhanced.

  At this time, the point of action of force from the sandwiching pieces 5a, 5a to the liners 4a, 4b (corresponding to the arrow d), and the point of action of force from the liners 4a, 4b to the core member 3 (corresponding to the arrow e) Should be as close as possible.

Further, as shown in FIG. 7A, the end portions 3 a and 3 b of the core member 3 are located on the inner side from the vertical end edge 11 of the corrugated board 1 by a predetermined distance v. The predetermined distance v is set to be larger than an assumed contraction amount w at the position of the vertical edge 11 that can occur in the corrugated board 1 during the use period of the panel P. In addition, this assumed shrinkage | contraction amount w is the horizontal direction distance of the vertical end edge 11 shown by the continuous line and the chain line in Fig.7 (a). Usually, the same amount of assumed contraction amount w is generated at the vertical edge 11 on the opposite side.
Thereby, when shrinkage deformation occurs in the corrugated board 1 due to aging, drying, and other causes, the core material 3 does not protrude from the vertical edge 11 of the corrugated board 1. Since the core material 3 does not protrude from the vertical edge 11 of the corrugated board 1, it is possible to avoid the occurrence of rattling of the vertical holding frame 5 due to the interference between the core material 11 and the vertical holding frame 5.

For example, as shown in FIGS. 7C and 7D, the end portions 3a and 3b of the plurality of core members 3 are located between the pair of sandwiching pieces 5a and 5a of the vertical holding frame 5. It can also be set as the structure which is carrying out. By doing so, the point of action of the force from the sandwiching pieces 5a, 5a to the liners 4a, 4b and the point of action of the force from the liners 4a, 4b to the core member 3 become closer, and the restraining force is increased. Further increase.
In this configuration as well, it is desirable that the end portions 3a and 3b of the core member 3 are located on the inner side from the vertical end edge 11 of the corrugated board 1 by a predetermined distance v.

Next, resin reinforcing members 20 are fitted into the four corners of the corrugated board 1 and fixed. As shown in FIG. 4B, the reinforcing member 20 includes a base portion 20 b having an L shape in plan view along the vertical edge 11 and the horizontal edge 12 of the corrugated board 1.
Further, the reinforcing member 20 includes opposing sandwiching pieces 20a and 20a extending from the base portion 20b in a direction along the front and back outer surfaces of the corrugated board 1, that is, in a direction along the surface direction of the front side liner 4a and the back side liner 4b. I have. The material of the reinforcing member 20 is not limited to resin, and for example, a metal member may be used.

4D and 4E show the ff cross section and the gg cross section of FIG. 1B, respectively. As shown in this figure, the reinforcing member 20 has a U-shaped cross section.
The sandwiching pieces 20a, 20a of the reinforcing member 20 are formed so that both the sandwiching pieces 5a, 5a of the vertical holding frame 5 and both the sandwiching pieces 15a, 15a of the horizontal holding frame 15 are outside in the thickness direction of the corrugated board 1 respectively. It has a function to press from the inside.
Therefore, each of the sandwiching pieces 20a, 20a exerts a function of pressing the corresponding sandwiching pieces 5a, 5a; 15a, 15a of the vertical holding frame 5 and the horizontal holding frame 15 to prevent the falling off. That is, the reinforcing member 20 complements the elastic force of the pair of sandwiching pieces 5a, 5a; 15a, 15a in the vertical holding frame 5 and the horizontal holding frame 15, and the vertical holding frame 5 and the horizontal holding frame 15 The pressing force (insertion force) can be strengthened.

In this embodiment, on the outer surface of the liner 4b on the back side of the corrugated board 1, the inner side of the inner edges of the vertical holding frame 5 and the horizontal holding frame 15 (the inner edges of the sandwiching pieces 5a, 15a) is made of polystyrene foam. It is covered with a protective plate 6. The protective plate 6 makes the liner 4b on the back side invisible and improves the appearance.
If the outer edge of the protective plate 6 substantially coincides with the inner edges of the sandwiching pieces 5a and 15a, or is slightly inside the inner edges of the sandwiching pieces 5a and 15a, the liner 4b on the back side is externally visible. It is desirable because it is almost invisible.

  The method of fixing the protective plate 6 to the corrugated board 1 will be described. As shown in FIG. 4C, a thin plate-like locking plate 16 is fixed to the surface of the protective board 6 on the corrugated board 1 side. . This fixing is performed by applying a minimum amount of adhesive along the edge of the hole 16a provided in the locking plate 16 and fixing the both together. At this time, an adhesive is present along the edge of the hole 16a, and the adhesive is difficult to spread in other portions.

  The locking plate 16 includes the holding pieces 5a and 15a of the vertical holding frame 5 and the horizontal holding frame 15 and a liner 4b on the back side of the corrugated board 1 (the outer sheet 10 when the outer sheet 10 is interposed). Between the portion sandwiched between and fixed to each other, the sandwiching piece 20a of the reinforcing member 20, and the liner 4b on the back side of the corrugated board 1 (or the exterior sheet 10 when the exterior sheet 10 is interposed). It is held so that it does not fall off with the portion fixed between the two.

Further, the portions of the vertical holding frame 5 and the horizontal holding frame 15 that are pressed by the holding pieces 5a and 15a are further held by the holding pieces 20a and 20a of the reinforcing member 20 in the thickness direction of the corrugated board 1. The holding force is enhanced by being sandwiched from both sides and being pressed from the outside in the thickness direction toward the inside.
In this embodiment, the elastic force due to the holding pieces 20a, 20a of the reinforcing member 20 is set to be stronger than the elastic force of the holding pieces 5a, 15a of the vertical holding frame 5 and the horizontal holding frame 15. Therefore, the reinforcing effect by the reinforcing member 20 is high.

  Further, as shown in FIG. 4A, a groove 20c extending from the leading edge of the sandwiching piece 20a toward the base portion 20b is formed on the inner surface of the sandwiching piece 20a on the side facing the liner 4b on the back side of the reinforcing member 20. Is formed.

  The reinforcing members 20 provided at the respective corners are bonded and fixed to the locking plates 16 by the adhesive force of the adhesive adhered in the grooves 20c, and are fixed so as not to drop off.

As a result, the adhesive easily stays in the groove 20c, so that the adhesion of the adhesive is limited to a certain area, and the adhesive can be easily removed during recycling. Further, if the adhesion of the adhesive is limited to the inside of the groove 20c, when disassembling the panel, it is possible to easily separate the bonded portion by inserting a jig such as a screwdriver along the groove 20c. it can.
The effect of the groove 20c is the same in the case of the panel P in which the locking plate 16 and the protection plate 6 are not provided.

  In this embodiment, the price card panel P as shown in FIG. 1 has been described. However, the panel P can be used for any purpose, and can be used for a white board as shown in FIG. 8, for example.

1 shows an embodiment, (a) is a perspective view from the front side, (b) is a perspective view from the back side. Exploded perspective view of the same embodiment (A) is a plan view of the corrugated board after the core material is inserted, (b) is a side view thereof, and (c) and (d) are plan views of the exterior sheets, respectively. (A) is an exploded plan view of the embodiment, (b) and (c) are enlarged views of main parts thereof, (d) is a sectional view taken along line ff of FIG. 1 (b), and (e) is FIG. 1 (b). Gg cross section of Hh sectional view of FIG. (A) is a comparative example assuming that no vertical holding frame is provided, and (b) is an explanatory view when a vertical holding frame is provided. (A) is a principal part enlarged plan view, (b) is the front view, (c) is a principal part enlarged plan view of a modification, and (b) is the front view. Perspective view of another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Corrugated board 2 Middle core 3 Core material 3a, 3b End part 4 Liner 4a Front side liner 4b Back side liner 5 Vertical holding frame 5a, 15a Holding piece 5b, 15b Base part 6 Protection board 10 Exterior sheet 10a First exterior sheet 10b Second exterior sheet 10c Folding piece 10d Hole 10e Double-sided tape 11 Vertical edge 12 Horizontal edge 13 Iron plate 15 Horizontal holding frame 16 Locking plate 16a Hole 20 Reinforcement member 20a Holding piece 20b Base e Clearance P Panel

Claims (12)

  By attaching a shaft-like core material (3) along the direction in which the wave of the core (2) of the flat corrugated board (1) provided with the liner (4) and the core (2) extends, The panel characterized by suppressing the curvature which arose in the said corrugated board board (1) with the rigidity of the core material (3).   The panel according to claim 1, wherein the core material is made of glass fiber.   The panel according to claim 1 or 2, wherein the core material (3) is inserted into a gap (e) between the liner (4) and the middle core (2).   The core material (3) is formed such that at least one end (3a) in the axial direction is tapered, and is inserted into the gap (e) from the one end (3a). The panel according to claim 3. A plurality of the core members (3) are inserted into the single corrugated board (1), and the corrugated board (1) on the side facing the end portions (3a, 3b) of the core members (3). A vertical end edge (11) of the base plate (5b) along the vertical end edge (11), and a pair of sandwiching pieces (5a) extending from the base portion (5b) in the direction along the front and back outer surfaces of the corrugated board (1). , 5a) and a vertical holding frame (5) having a U-shaped cross section,
The end portions (3a, 3b) of the plurality of core members (3) are formed by the elastic force in a direction in which the holding pieces (5a, 5a) included in the vertical holding frame (5) approach each other. The panel according to claim 3 or 4, wherein the degree of close contact with 4) and the inner core (2) is increased.   The end (3a, 3b) of the core member (3) is located between the pair of sandwiching pieces (5a, 5a) of the vertical holding frame (5). Panel described.   The ends (3a, 3b) of the core member (3) are located at a predetermined distance (v) from the vertical edge (11) of the corrugated board (1), and the predetermined distance (v) In the usage state of the panel, the contraction amount (w) at the position of the vertical edge (11) that can occur in the corrugated board (1) during the period of use is set to be larger. Item 7. The panel according to item 5 or 6.   The outer shape of the corrugated board (1) is rectangular in a plan view. A base (15b) along the lateral end (12) of the corrugated board (1) and a base (15b) A horizontal holding frame (15) having a U-shaped cross section having a pair of sandwiching pieces (15a, 15a) extending in the direction along the front and back outer surfaces of the corrugated board (1) is fitted and fixed. Item 8. The panel according to any one of Items 5 to 7.   A corner portion of the corrugated cardboard plate (1) has an L-shaped base (20b) in plan view along the vertical end edge (11) and the lateral end edge (12), and the corrugated board ( 1) A reinforcing member (20) having a U-shaped cross-section having opposing sandwiching pieces (20a, 20a) extending in a direction along the front and back outer surfaces is fitted and fixed, and the reinforcing member (20) is fixed to the vertical holding frame. A function of pressing both sandwiching pieces (5a, 5a) of (5) and both sandwiching pieces (15a, 15a) of the lateral holding frame (15) from the outside in the thickness direction of the corrugated board (1), respectively. The panel according to claim 8, comprising:   A groove (20c) extending from the tip edge of the sandwiching piece (20a) toward the base (20b) is formed on the inner surface of any of the sandwiching pieces (20a, 20b) of the reinforcing member (20), and the groove The panel according to claim 9, wherein the reinforcing member (20) is fixed so as not to fall off by an adhesive force of an adhesive adhered in (20 c).   The outer surface on the front side of the corrugated board (1) is covered with an exterior sheet (10) made of a single material or a plurality of materials selected from a heat-resistant resin sheet, a heat-resistant resin film, or a heat-resistant nonwoven fabric, The exterior sheet (10) is folded back, and the folded portion is fixed by pressing the reinforcing member (20) through the vertical holding frame (5) and / or the horizontal holding frame (15). The panel according to claim 9 or 10, wherein the panel is formed.   On the outer surface on the back side of the cardboard plate (1), the inner side of the inner edges of the vertical holding frame (5) and the horizontal holding frame (15) is covered with a protective plate (6), and the cardboard of the protective plate (6) A thin plate-like locking plate (16) is fixed to the surface on the plate (1) side, and the locking plate (16) attaches the vertical holding frame (5) and / or the horizontal holding frame (15). The panel according to claim 9, wherein the panel is fixed by being pressed by the reinforcing member (20).

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