JP2017125392A - Flush panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light weight flush panel superior in strength preferably applicable in particular to step board for stairs.SOLUTION: A flush panel 1, which has a long substantially rectangular shape, is constituted of a first panel 2 and a second panel 3 facing to each other being separated away from each other, and a core material 4 disposed therebetween. The core material extending along in a longitudinal direction, which includes: a plurality of wooden crosspieces 5 each of which is in contact with the first panel and the second panel; and a plurality of spacer materials 6 disposed along a transverse direction at least in an area adjacent to both ends in the longitudinal direction. The wooden crosspieces are disposed between the neighboring spacer materials in the transverse direction. Each of the plurality of wooden crosspieces is separated from each other and disposed generally parallel to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flash panel.

  Conventionally, wooden treads used for residential stairs have been used as a base material in which medium density fiberboard (MDF) is laminated on the front and back surfaces of laminated wood or plywood.

  On the other hand, a stair tread having a flash structure has also been proposed. For example, in the stair tread of Patent Document 1, a single-layer laminated material (LVL) in which a single-layer lamination direction is vertical is used to form a four-sided frame, and a low specific gravity wood core material such as an insulation board is included in the frame. Has been. And thin plates, such as a plywood and a medium density fiber board (MDF), are stuck on both surfaces of this framework. According to this stair tread, the weight can be reduced.

JP-A-10-299206

  However, there is a problem that a stair tread in which medium density fiberboard (MDF) is laminated on the front and back surfaces of laminated wood or plywood is heavy and requires labor for transportation and construction. On the other hand, in the case of the stair tread of Patent Document 1, although it has been reduced in weight by the flash structure, it cannot be said that it has sufficient strength.

  The present invention has been made in view of the circumstances as described above, and it is an object of the present invention to provide a flash panel that is lightweight and excellent in strength and that can be suitably used particularly for a stair tread.

In order to solve the above problems, the flash panel of the present invention is a long, substantially rectangular flash panel in which a core member is sandwiched between a first plate member and a second plate member that are spaced apart from each other and face each other. There,
The core material is
A plurality of wooden bars extending along the longitudinal direction and contacting the first plate and the second plate;
A plurality of spacer materials arranged along the short direction, at least in the vicinity of both ends in the longitudinal direction;
Have
The wooden crosspieces are disposed between the spacer members adjacent in the short direction, and the plurality of wooden crosspieces are spaced apart from each other and arranged substantially in parallel.

  The flash panel of the present invention is lightweight and excellent in strength.

It is the perspective view and partial perspective enlarged view which illustrated one Embodiment of the flash panel of this invention as a step board for stairs. FIG. 2A is a cross-sectional view of the flash panel illustrated in FIG. FIG. 2B is an internal perspective view from above of the flash panel illustrated in FIG. It is the internal perspective view from the upper side which illustrated one implementation state of the manufacturing method of the flash panel of the present invention. FIG. 4B is a cross-sectional view in the vicinity of the center in the lateral direction illustrating another embodiment of the flash panel of the present invention, and FIG. 4B is an internal perspective view from above illustrating another embodiment of the flash panel of the present invention. It is. It is the schematic which illustrated one Embodiment of the adhesion method of the internal crosspiece and metal plate in the flash panel of this invention. (A)-(C) are sectional drawings which illustrated the section corresponding to Drawing 2 (A) about another embodiment of the flash panel of the present invention. (D) And (E) is sectional drawing which illustrated the cross section corresponding to FIG. 2 (A) about another embodiment of the flash panel of this invention.

  FIG. 1 is a perspective view and a partial perspective view illustrating an embodiment of a flash panel of the present invention as a step board for stairs. 2A is a cross-sectional view of the flash panel taken along the line Y-Y 'illustrated in FIG. FIG. 2B is an internal perspective view from above of the flash panel illustrated in FIG.

  The flash panel 1 has a long, substantially rectangular shape in which a core member 4 is sandwiched between a first plate member 2 and a second plate member 3 that are spaced apart from each other and face each other. The core material 4 extends along the longitudinal direction, and is disposed along the short direction at least near the both ends in the longitudinal direction, and a plurality of wooden crosspieces 5 contacting the first plate material 2 and the second plate material 3. And a plurality of spacer members 6. The wooden crosspieces 5 are disposed between the spacer members 6 adjacent to each other in the short direction, and the plurality of wooden crosspieces 5 are spaced apart from each other and arranged substantially in parallel.

  In this flash panel 1, it is preferable that the wooden crosspiece 5 and the spacer material 6 are bonded.

  In this flash panel 1, the wooden crosspieces 5 are arranged near both ends in the short-side direction, and are substantially prismatic end-pieces 51 made of a single plate laminated material (LVL) and near the center in the short-side direction. It is preferable to have a plurality of thin plate-like internal crosspieces 52 that are arranged and stand substantially vertically. The end bar member 51 is preferably in contact with the first plate member 2 and the second plate member 3 on the laminated surface side of the single plate.

  In this flash panel 1, it is preferable that the space | interval of the wooden crosspieces 5 adjacent in a transversal direction is 10 mm-40 mm.

  In the flash panel 1, the metal plate 7 is preferably bonded to the side surfaces of the two or more internal crosspieces 52.

  In the flash panel 1, it is preferable that the two or more internal crosspieces 52 to which the metal plate 7 is bonded are disposed so as to sandwich the internal crosspiece 52 to which the metal plate 7 is not bonded in the short direction.

  In the flash panel 1, the internal crosspiece 52 is formed of two or more divided bodies that are divided in the longitudinal direction, and the divided bodies are preferably coupled to each other via the metal plate 7.

  It is preferable that a front plate made of medium density fiberboard (MDF) is disposed between the first plate member 2 and the second plate member 3 to cover the core member 4 on one end side in the short direction.

  In this flash panel 1, the spacer material 6 is formed of a single plate laminated material (LVL), the laminated surface side of the single plate is in contact with the first plate material 2 and the second plate material 3, and the internal crosspiece 52 is the middle. It is preferably formed of a density fiber board (MDF).

  In the flash panel 1, at least one of the first plate member 2 and the second plate member 3 is formed of a wood fiber board, and at least one of the front side and the back side is provided with a thermosetting resin. It is preferable that a reinforcing material 8 made of a glass fiber sheet impregnated with is disposed.

In the flash panel 1, the basis weight of the glass fiber sheet is preferably 150~600g / ^{m 2.}

  In the flash panel 1, the content of the thermosetting resin is preferably 10 to 50% by mass with respect to the total mass per unit area of the glass fiber sheet and the thermosetting resin.

  In the flash panel 1, it is preferable that the reinforcing material 8 is disposed on the back surface side of the first plate material 2 and the back surface side of the second plate material 3.

  The manufacturing method of the flash panel 1 of the present invention includes the following steps. A step of impregnating a curable resin into a glass fiber sheet and drying it to produce an uncured prepreg. A step of supplying uncured prepreg to both surfaces of the core material 4, sandwiching the core material 4 and the prepreg between the first plate material 2 and the second plate material 3, and integrating them by hot pressing.

  Hereinafter, an embodiment of the flash panel of the present invention will be described by taking a flash panel used as a stair tread as an example.

  As illustrated in FIG. 1 and FIG. 2, the flash panel 1 of this embodiment is a substantially rectangular flat plate as a whole, and is disposed between a first plate 2 and a second plate 3 that are spaced apart from each other and face each other. The core material 4 is sandwiched.

  The 1st board | plate material 2 and the 2nd board | plate material 3 are formed in the horizontally long substantially rectangular thin plate shape. The first plate material 2 is bonded to the front surface side of the core material 4, and the second plate material 3 is bonded to the back surface side of the core material 4. In this embodiment, the “surface side of the core material 4” refers to the side located on the upper surface (exposed surface) side of the stair tread, and the “back surface side of the core material 4” refers to the stair tread. The side located on the lower surface side.

  The material of the 1st board | plate material 2 and the 2nd board | plate material 3 is a wood fiber board, and it is preferable that it is formed with the medium density fiber board (MDF) especially. When the first plate member 2 and the second plate member 3 are medium density fiber boards (MDF), the strength of the flash panel 1 is increased and the weight can be reduced.

  In the flash panel 1 of this embodiment, a decorative sheet 21 is disposed on the surface side of the first plate member 2. By providing the decorative sheet 21 on the surface side of the first plate member 2, the water resistance and design properties of the flash panel 1 are improved.

  Furthermore, a front plate D made of a medium density fiberboard (MDF) is disposed between the first plate member 2 and the second plate member 3 on one end side (the nose side) of the flash panel 1 in the short direction, The side surface of the core material 4 is covered. By providing the front plate D, the strength of the flash panel 1 is increased, and the design is further improved.

  The core member 4 has a plurality of wooden crosspieces 5 and a plurality of spacer members 6.

  The wooden crosspiece 5 is composed of an end crosspiece 51 and an internal crosspiece 52.

  The end crosspiece 51 has a long, substantially prismatic shape, and is disposed near both ends of the flash panel 1 in the short direction. The dimensions of the end crosspiece 51 are not particularly limited. For example, the width (the horizontal length in the short direction of the flash panel 1) and the vertical length (the length in the thickness direction of the flash panel 1) are 20 mm to 40 mm. Preferably).

  In the flash panel 1 of this embodiment, the end crosspiece 51 is formed of a single plate laminated material (LVL), extends along the longitudinal direction of the flash panel 1, and the first plate material 2 and the second plate material 3. It is in contact. Further, as shown in the partially transparent enlarged view of FIG. 1 in which illustration of the front plate member 2 and the decorative plate 21 is omitted, the end plate member 51 has the first plate member 2 and the second plate member 3 on the laminated surface 51A side of the single plate. Abut. The end crosspiece 51 is formed of a single plate laminated material (LVL), and the laminated surface 51A side of the single plate is in contact with the first plate material 2 and the second plate material 3, whereby the strength of the flash panel 1 is increased. It is growing.

  The internal crosspiece 52 is a thin plate standing upright substantially vertically, and a plurality of the internal crosspieces 52 are arranged in the vicinity of the center of the flash panel 1 in the short direction. In the flash panel 1 of this embodiment, the internal crosspiece 52 is formed of a medium density fiber board (MDF), and extends along the longitudinal direction of the flash panel 1 so as to contact the first plate 2 and the second plate 3. Touching. The thickness and number of the inner crosspieces 52 can be appropriately designed in consideration of the strength and weight of the flash panel 1. Specifically, the thickness of the thin plate-like inner crosspiece 52 (the length in the short direction of the flash panel 1) is, for example, about 1.5 mm to 4.5 mm, preferably about 2.0 mm to 3.0 mm. A range can be illustrated. Moreover, the number of arrangement | positioning of the internal crosspiece 52 can illustrate the range of about 3-8, for example. Further, the longitudinal length of the inner crosspiece 52 (length in the thickness direction of the flash panel 1) can be designed to be substantially equal to the vertical length of the end crosspiece 51.

  The spacer material 6 has a substantially rectangular parallelepiped shape, and a plurality of spacer members 6 are arranged in the short direction near both ends in the longitudinal direction of the flash panel 1. Specifically, two spacer members 6 having substantially the same size are opposed to each other in the longitudinal direction of the flash panel 1 to form a set, and the plurality of sets of spacer members 6 are continuously provided along the short side direction. Is provided.

  In the flash panel 1 of this embodiment, the spacer material 6 is formed of a single plate laminated material (LVL), and the laminated surface 6A side of the single plate is in contact with the first plate material 2 and the second plate material 3. The strength of the flash panel 1 is increasing.

  Then, in the state in which the vicinity of the end of the inner cross member 52 is inserted between the spacer members 6 adjacent to each other in the short direction of the flash panel 1, the end cross member 51, the inner cross member 52, and the spacer member 6 are mutually connected. It is glued. That is, the internal crosspieces 52 and the spacer members 6 are alternately arranged along the short direction of the flash panel 1. As a result, the plurality of internal crosspieces 52 are arranged substantially parallel to each other in a state of being separated along the short direction of the flash panel 1, so that the internal space of the flash panel ( A hollow portion) is formed to reduce the weight.

  In the flash panel 1 of this embodiment, the spacer member 6 and the wooden crosspiece 5 (the end crosspiece 51 and the internal crosspiece 52) are bonded by an adhesive, not by a fixture such as a nail or a hook. Therefore, for example, the vicinity of the end of the flash panel 1 can be cut with a saw or the like. For this reason, for example, when disassembling the flash panel 1 that is no longer necessary, the work can be easily performed without using a special tool.

  In the flash panel 1 of this embodiment, since the width of the spacer material 6 (the horizontal length in the short direction of the flash panel 1) is formed to be substantially equal, the internal crosspiece 52 is spaced substantially equal in the short direction. Is arranged in. The interval between the end crosspieces 51 and the internal crosspieces 52 adjacent to each other in the short-side direction and the interval between the internal crosspieces 52 can be appropriately designed. For example, it is preferably 10 mm to 40 mm, and further 20 mm to 40 mm. It is more preferable that When the interval between the adjacent wooden crosspieces 5 is within this range, the strength of the flash panel 1 is increased and the weight can be reduced.

  In the flash panel 1 of this embodiment, an embodiment in which all the spacer materials 6 are formed to have substantially the same size is illustrated, but the present invention is not limited to such an embodiment. That is, the flash panel 1 only needs to have the same width (the horizontal length in the short direction of the flash panel 1) of the pair of spacer members 6 facing in the longitudinal direction, and a plurality of the flash panels 1 arranged in the short direction. The spacer members 6 may have different widths and lengths (horizontal lengths in the longitudinal direction of the flash panel 1).

  In the flash panel 1 of this embodiment, the internal crosspiece 52 is disposed between the spacer members 6 adjacent to each other in the short direction, and a plurality of wooden crosspieces 5 (the end crosspiece 51 and the internal crosspiece 52 are disposed. ) Have flash structures that are spaced apart from each other and arranged substantially parallel to each other, and thus have excellent strength and light weight. Further, for example, the manufacturing cost can be reduced as compared with the flash panel 1 of Patent Document 1 in which the wood core material is filled. Furthermore, since the edge material of a single board laminated material (LVL) etc. can be utilized as the spacer material 6, for example, the manufacturing cost of the flash panel 1 can further be suppressed.

  FIG. 3 is an internal perspective view from above illustrating an embodiment of the flash panel manufacturing method of the present invention. Portions common to the embodiment described with reference to FIGS. 1 and 2 are denoted by the same reference numerals, and a part of the description is omitted below.

  In the flash panel 1 in the middle of manufacture illustrated in FIG. 3, in addition to the spacer material 6 provided at both ends in the longitudinal direction, another spacer material 61 is provided near the center in the longitudinal direction. The spacer member 61 is slightly long along the longitudinal direction of the flash panel 1 and is provided in a plurality along the short direction. The flash panel 1 is illustrated in FIGS. 1 and 2 by cutting along with the spacer material 61 so as to cross the lateral direction at a central position in the longitudinal direction (dotted line L portion in FIG. 3). Two flash panels 1 similar to the embodiment can be manufactured.

  The spacer material 61 is formed of a single plate laminated material (LVL), and since the laminated surface 61A side of the single plate is in contact with the first plate material 2 and the second plate material 3, two pieces formed by cutting are formed. The strength of the flash panel 1 is increasing. When the spacer material 61 is a single-plate laminated material (LVL) end material or the like, the manufacturing cost of the flash panel 1 can be further suppressed.

  In the flash panel 1, one or more spacer materials 6 can be separately provided at appropriate positions such as near the center in the longitudinal direction in consideration of strength, weight, and the like.

  4A is a cross-sectional view of the flash panel according to another embodiment of the present invention, and is a cross-sectional view near the center in the short direction. FIG. 4B illustrates another embodiment of the flash panel of the present invention. FIG. Portions common to the embodiment described with reference to FIGS. 1 and 2 are denoted by the same reference numerals, and a part of the description is omitted below.

  In the flash panel 1 of this embodiment, the metal plate 7 is bonded to the side surfaces of two internal crosspieces 52 out of a plurality of internal crosspieces 52 arranged with an adhesive.

  The metal plate 7 is formed in a long plate shape in the longitudinal direction of the flash panel 1. The thickness of the metal plate 7 can be appropriately designed in consideration of the strength and weight of the flash panel 1, but is, for example, in the range of about 0.3 to 0.8 mm, preferably about 0.5 to 0.7 mm. It can be illustrated.

  In the flash panel 1 of this embodiment, since the metal plate 7 is bonded to the side surface of the internal crosspiece 52, the strength of the flash panel 1 is further increased. Further, the two internal crosspieces 52 to which the metal plate 7 is bonded are disposed in the short direction of the flash panel 1 with the internal crosspiece 52 to which the metal plate 7 is not bonded interposed therebetween. That is, the two internal crosspieces 52 to which the metal plate 7 is bonded are not adjacent to each other in the short direction of the flash panel 1, and the internal crosspiece 52 to which the metal plate 7 is not bonded is disposed therebetween. . As a result, the flash panel 1 is reinforced in a well-balanced manner, and partial strength deficiencies are suppressed.

  Furthermore, for example, the strength of the flash panel 1 can be sufficiently increased by disposing a plurality of thin metal plates 7 having a thickness of about 0.3 to 0.8 mm. There is no problem, and the flash panel 1 is lightweight.

  In the flash panel 1 of this embodiment, the embodiment in which the metal plate 7 is bonded to the side surfaces of the two internal crosspieces 52 is exemplified. However, the number of the metal plates 7 arranged depends on the strength of the flash panel 1. It can be appropriately designed in consideration of weight. Specifically, it is preferable that the number of the metal plates 7 be two or more, and practically, for example, a range of 2 to 5 can be exemplified. Also in this case, it is preferable that the internal crosspieces 52 to which the metal plates 7 are bonded are alternately arranged in the short direction across the internal crosspieces 52 to which the metal plates 7 are not bonded. Thereby, the strength of the flash panel 1 can be further increased.

  FIG. 5 is a schematic view illustrating an embodiment of a method for bonding the internal crosspiece 52 and the metal plate in the flash panel of the present invention.

  The internal crosspiece 52 is formed by three divided bodies 52A, 52B, and 53C divided in the longitudinal direction of the flash panel 1. As the internal crosspiece 52, for example, an end material of a medium density fiberboard (MDF) can be used as the divided bodies 52A, 52B, and 53C. The total length of the three divided bodies 52A, 52B, and 53C is adjusted in advance to be approximately equal to the length of the flash panel 1 in the longitudinal direction.

  The split bodies 52A, 52B, and 53C constituting the internal crosspiece 52 are bonded by bonding the two metal plates 7A and 7B from the side surfaces so that the end portions in the longitudinal direction abut each other and are joined to each other. can do. As a result, the three divided bodies 52A, 52B, and 53C are continuously coupled in the longitudinal direction via the metal plate 7 to form the internal crosspiece 52.

  Thus, the strength of the flash panel 1 can be increased by providing two or more internal crosspieces 52 to which the metal plate 7 is bonded. Moreover, in the flash panel 1 of this embodiment, since the internal crosspiece 52 can be formed using the end material of a medium density fiber board (MDF) as the division body 52A, 52B, 53C, manufacturing cost is also low. Can be suppressed.

  In this embodiment, an example in which the inner crosspiece 52 is formed of three divided bodies 52A, 52B, and 53C is illustrated. However, the number of divided bodies may be two or more, depending on the number of divided bodies and the like. The number and length of the metal plates 7 can be designed as appropriate.

  FIGS. 6A to 6C, 7 </ b> D, and 7 </ b> E are cross-sectional views illustrating a cross-section corresponding to FIG. 2A, regarding another embodiment of the flash panel of the present invention. Portions common to the embodiment described with reference to FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof is omitted below.

  In the flash panel 1 of the embodiment illustrated in FIG. 6A, a reinforcing material 8 made of a glass fiber sheet impregnated with a thermosetting resin is disposed on the surface side of the first plate member 2.

  The flash panel 1 of the embodiment illustrated in FIG. 6B is a glass fiber sheet in which the front side and the back side of the first plate member 2 (between the core member 4 and the first plate member 2) are impregnated with a thermosetting resin. A reinforcing member 8 is provided. Here, the “back surface of the first plate member 2” refers to the surface of the first plate member located on the side facing the core member 4.

  In the flash panel 1 of the embodiment illustrated in FIG. 6C, the reinforcing material 8 made of a glass fiber sheet impregnated with a thermosetting resin is disposed on the front side and the back side of the first plate member 2. Further, in the flash panel 1, a reinforcing material 8 made of a glass fiber sheet impregnated with a thermosetting resin is also disposed on the back surface side (between the core material 4 and the second plate material 3) of the second plate material 3. . Here, the “back surface of the second plate material 3” refers to the surface of the second plate material 3 located on the side facing the core material 4.

  In the flash panel 1 of the embodiment illustrated in FIG. 7D, a reinforcing member 8 made of a glass fiber sheet impregnated with a thermosetting resin is disposed on the back side of the first plate member 2.

  In the flash panel 1 of the embodiment illustrated in FIG. 7E, the reinforcing material 8 made of a glass fiber sheet impregnated with a thermosetting resin is provided on the back surface side of the first plate material 2 and the back surface side of the second plate material 3. It is arranged.

In the embodiment illustrated in FIGS. 6 (A) to 6 (C), FIGS. 7 (D) and (E), the material of the glass fiber sheet constituting the reinforcing material 8 is not particularly limited, and a glass cloth, a glass mat, or the like is used. It can be illustrated preferably. Moreover, it is preferable that the fabric weight of a glass fiber sheet is 150-600 g / m < ² >. When the basis weight of the glass fiber sheet is within this range, the impact resistance strength of the flash panel 1 can be reliably increased.

  Furthermore, the thermosetting resin which comprises the reinforcing material 8 can illustrate a melamine resin, DAP resin, a phenol resin, etc. Moreover, it is preferable that content of a thermosetting resin is 10-50 mass% with respect to the total mass per unit area of a glass fiber sheet and a thermosetting resin. When the content of the thermosetting resin impregnated in the glass fiber sheet is within this range, the impact strength of the flash panel 1 can be more reliably increased.

  As described above, in the embodiment illustrated in FIGS. 6 and 7, at least one of the first plate member 2 and the second plate member 3 has a thermosetting resin on at least one of the front surface side and the back surface side. A reinforcing material 8 made of a glass fiber sheet impregnated with is disposed. For this reason, the flash panel 1 of this embodiment is lightweight and is excellent in the water resistance, impact strength, etc. of the flash panel 1. In particular, the flash panel 1 exhibits particularly excellent strength when the reinforcing material 8 is disposed at least on the surface side of the first plate material 2 (or the second plate material 3). In addition, if the number of reinforcing members 8 is large, the strength of the flash panel 1 can be easily increased, and the number and positions of the reinforcing members 8 can be appropriately designed according to the application of the lash panel 1.

Further, an example of a method for manufacturing the flash panel of the embodiment illustrated in FIG. In one embodiment of the manufacturing method of the flash panel illustrated in FIG. 7E, for example, the following steps can be included.
(1) A step of impregnating a glass fiber sheet with a thermosetting resin and drying it to produce an uncured prepreg.
(2) A step of supplying uncured prepreg to both surfaces of the core material 4, sandwiching the core material 4 and the prepreg between the first plate material 2 and the second plate material 3, and integrating them by hot pressing.

  In the method for manufacturing the flash panel 1, the prepreg produced in the step (1) is supplied to both surfaces of the core material 4 having the structure described with reference to FIGS. Then, the core member 4 and the prepreg are sandwiched between the first plate member 2 and the second plate member 3 and integrated by hot-pressure molding. The reinforcing material 8 is formed by the prepreg (thermosetting resin) being cured by heat. The conditions for hot pressing can be set as appropriate depending on the type of the thermosetting resin, the amount of prepreg, and the like. For example, the heating temperature can be exemplified by 120 ° C. to 230 ° C.

  In this method of manufacturing the flash panel 1, the first plate member 2 and the second plate member 3 are simultaneously integrated by hot pressing through the prepreg supplied to both surfaces of the core member 4, so that no separate adhesive is required. Yes, the flash panel 1 can be manufactured efficiently.

  The flash panel of the present invention is not limited to the above embodiment. The flash panel can be used for various applications such as doors, wall materials, furniture, etc. in addition to stair treads. Further, for example, in the vicinity of the center in the short direction of the core material of the flash panel, in addition to the thin plate-like internal crosspiece, a prismatic crosspiece similar to the end crosspiece can be disposed. Furthermore, for example, also in the flash panel of the embodiment illustrated in FIG. 3, a metal plate can be bonded to the side surface of the internal crosspiece. In this case, for example, a metal plate can be bonded to the side surfaces of the internal crosspieces located on both sides (both sides in the longitudinal direction of the flash panel) of the spacer material disposed in the center in the short direction. In addition, for example, a resin decorative sheet may be appropriately disposed on the surface of the first plate member or the second plate member to enhance the water resistance and design properties of the flash panel.

  Hereinafter, the flash panel of the present invention will be described together with examples, but the flash panel of the present invention is not limited to the following examples.

<1> Fabrication of flash panel 1
(1) Example 1
As illustrated in FIG. 1 and FIG. 2, an end crosspiece made of a single plate laminate (LVL) and six thin plate-like internal crosspieces made of medium density fiberboard (MDF) (thickness (step board for steps) And a plurality of spacer materials arranged between the end crosspiece and the internal crosspiece were bonded and integrated to produce a core material. Further, as the first plate member and the second plate member, MDF having a thickness of 2.5 mm was bonded to both surfaces of the core member to produce a stair tread (flash panel).

In this flash panel, the interval between the adjacent internal crosspieces (spacer material width) is 25 mm, and the longitudinal length of the end crosspiece and the internal crosspiece (length in the thickness direction of the stair tread) is 30 mm. It was.
(2) Example 2
A stair tread was produced by bonding a steel plate having a thickness of 0.6 mm to each side surface of the six internal crosspieces of the stair tread (flash panel) produced in Example 1.
(3) Comparative Example 1
A step board for staircases was prepared in which MDF with a thickness of 4 mm was bonded to each of the front and back surfaces of a softwood plywood (thickness 28.5 mm).

<1-2> Measurement of bending strength Using a universal testing machine, the bending load Young (Young = load / displacement (tilt) (N / mm)) with a central load of 750 mm free end of a flash panel of 35 mm x 240 mm x 750 mm Was measured.

<1-3> Results Table 1 shows the results.

  As shown in Table 1, it was confirmed that the stair treads of Examples 1 and 2 were both lighter than the stair treads of Comparative Example 1 and had excellent bending strength.

<2> Fabrication of flash panel 2
<2-1>
(1) Example 4
A melamine resin was applied to a glass cloth having a basis weight of 200 g / m ^{2 so} that the glass: resin ratio was 80:20 and dried at room temperature to prepare an uncured prepreg (reinforcing material).
A prepreg is arranged on the front side and the back side of the first plate made of MDF (4 mm thick), and the same core material as in Example 1 is formed with this first plate and the second plate made of MDF (4 mm thick). The flash panel was provided with a reinforcing material by hot pressing under a condition of 150 ° C. for 5 minutes.
(2) Example 5
A prepreg produced in the same manner as in Example 1 was supplied to one side (back side) of the first plate (4 mm thick MDF). With this first plate material and second plate material (4 mm thick MDF), the same core material as in Example 1 is sandwiched, and heat-pressure-molded under conditions of 150 ° C. for 5 minutes to bond and harden the reinforcing material. A provided flash panel was produced.
(3) Reference Example MDF (4 mm thickness) used in Examples 4 and 5 was prepared.

<2-2> Evaluation method In order to grasp the strength of the flash panel, a 500 g weight was dropped from a height of 1.5 m to the flash panel produced in Examples 4 and 5, and the amount of dents on the surface was measured. . The same measurement was performed for the MDF of the reference example.

<2-3> Results The flash panel of Example 4 in which the reinforcing material is disposed on the front surface side and the back surface side of the first plate member has a dent amount of 0.03 mm and has good impact strength. It was confirmed that The flash panel of Example 5 in which the reinforcing material is disposed on the back surface side of the first plate member has a dent amount of 1.79 mm, and has been confirmed to have an impact strength that can be used as a product. .
On the other hand, in the MDF of the reference example, the dent amount was 4.63 mm, and it was confirmed that the impact resistance strength was not sufficient.

  From the above, the flash panel in which a reinforcing material made of a glass fiber sheet impregnated with a thermosetting resin is disposed on at least one of the front side or the back side of the first plate or the second plate is lightweight. It was confirmed that the impact strength was excellent. Further, the flash panel has particularly excellent impact strength when the reinforcing material is disposed on the surface side of the first plate (or the second plate) as in the first embodiment, for example. Was confirmed.

DESCRIPTION OF SYMBOLS 1 Flash panel 2 1st board | plate material 3 2nd board | plate material 4 Core material 5 Wood crosspiece 51 End part crosspiece 51A Laminated surface 52 Internal crosspiece 52A, 52B, 52C Split body 6, 61 Spacer material 6A Laminated surface 7 Metal plate 8 Reinforcement Material D Front plate

Claims (14)

A long, substantially rectangular flash panel in which a core member is sandwiched between a first plate member and a second plate member facing each other apart from each other,
The core material is
A plurality of wooden bars extending along the longitudinal direction and contacting the first plate and the second plate;
A plurality of spacer materials arranged along the short direction, at least in the vicinity of both ends in the longitudinal direction;
Have
A flash panel characterized in that the wooden crosspieces are disposed between the spacer members adjacent in the lateral direction, and the plurality of wooden crosspieces are spaced apart from each other and arranged substantially in parallel. . The flash panel according to claim 1, wherein the wooden crosspiece and the spacer material are bonded together. The wooden crosspiece is
A substantially rectangular column-shaped end crosspiece made of a single plate laminated material (LVL) disposed near both ends in the short direction;
A thin plate-like internal crosspiece that is arranged near the center in the short direction and stands up vertically,
Have
3. The flash panel according to claim 1, wherein the end bar member is in contact with the first plate member and the second plate member on a laminated surface side of a single plate.   4. The flash panel according to claim 1, wherein an interval between the wooden crosspieces adjacent in the lateral direction is 10 mm to 40 mm. 5.   4. The flash panel according to claim 3, wherein a metal plate is bonded to side surfaces of the two or more internal crosspieces.   The two or more internal crosspieces to which the metal plate is bonded are arranged across the internal crosspiece to which the metal plate is not bonded in a short direction. Flash panel.   The internal crosspiece is formed of two or more divided bodies divided in the longitudinal direction, and the divided bodies are coupled to each other via the metal plate. The flash panel described. A front plate made of medium density fiberboard (MDF) is disposed between the first plate member and the second plate member on one end side in the short direction, and the core member is covered. Claims 1 to 7
The flash panel as described in any one of.   The spacer material is formed of a single plate laminated material (LVL), the laminated surface side of the single plate is in contact with the first plate material and the second plate material, and the internal crosspiece is a medium density fiber board (MDF) The flash panel according to claim 1, wherein the flash panel is formed of   The first plate member and the second plate member are made of wood fiber board, and at least one of the first plate member and the second plate member is at least one of the front surface side and the back surface side. The flash panel according to any one of claims 1 to 9, wherein a reinforcing member made of a glass fiber sheet impregnated with a thermosetting resin is disposed. The flash panel according to claim 10, wherein the basis weight of the glass fiber sheet is 150 to 600 g / m ² .   The content of the thermosetting resin is 10 to 50% by mass with respect to the total mass per unit area of the glass fiber sheet and the thermosetting resin. Flash panel.   The flash panel according to any one of claims 10 to 12, wherein the reinforcing material is disposed on a back surface side of the first plate material and a back surface side of the second plate material. It is a manufacturing method of the flash panel according to claim 13,
Impregnating the glass fiber sheet with the thermosetting resin and drying to produce an uncured prepreg;
Supplying the uncured prepreg to both surfaces of the core material, sandwiching the core material and the prepreg between the first plate material and the second plate material, and integrating them by hot pressing;
A method for manufacturing a flash panel, comprising: