JP6644245B2 - Structural plywood laminated with perforated steel sheets - Google Patents

Description

  The present invention relates to a load-bearing wall surface material used for a wall structure of a building, and more particularly to a structural plywood obtained by laminating and bonding a thin steel plate having many small holes and a wood-based plate. .

  Conventionally, the wall material, especially the face material, exerts resistance against the horizontal force acting on the building due to an earthquake or strong wind, etc., and the horizontal resistance performance of the face material greatly affects the seismic performance of the building. I dared. However, the conventional structural plywood made of a wood-based board, which is a main building material of the face material, has not so high a horizontal resistance performance. Therefore, in order to improve the seismic performance and the like of the building, it was necessary to take measures, for example, by increasing the thickness of the structural plywood or increasing the number of wall structures.

  However, when the thickness of the structural plywood is increased or the number of wall structures is increased, there is also a problem that a living space is reduced and a construction cost is increased. In addition, there is another construction method that improves the permissible strength by providing a bracing (braces). However, this construction method increases the construction time in addition to the bracing itself and the cost of building materials such as brackets. There was also a problem such as an increase in construction costs for installation.

  To solve such a problem, Patent Document 1 discloses a building material plywood (structure) in which a metal thin plate is bonded to one or both surfaces of a wood plywood or a wood plywood is bonded and polymerized to an entire surface of the metal thin plate with an adhesive. Plywood) is disclosed.

Japanese Utility Model Publication No. 49-132613

  However, in the plywood for building materials (structural plywood) described in Patent Document 1, the workability of fastening to a frame or the like is deteriorated in the plywood for structural materials (structural plywood) using a thin metal plate having a required strength. Also, there was a problem that the metal thin plate was deformed by the nail during nailing work, the adhesive surface with the wood plywood was easily peeled off, and the fixing strength could not be maintained.

  The present invention has been made in view of the above problems, and has high fixing strength to a frame or the like, high horizontal resistance performance as a surface material for load-bearing walls, good workability, and further, effective in reducing construction costs. It is an object of the present invention to provide a structural plywood composed of a perforated steel sheet and a wooden board.

  The present invention has been devised to achieve the above object. More specifically, it is a structural plywood having a substantially rectangular shape attached to a frame of a wall structure that constitutes a building, and includes a plurality of wood-based plate members and at least one sheet-like plate in a front view. A laminated body in which a perforated steel sheet which is a thin plate-shaped steel material having a large number of small circular holes is laminated, bonded with an adhesive, heated and pressed and integrated, and a hole portion of the perforated steel sheet on the front side of the laminated body A configuration including a display portion displayed so that the position can be identified from the surface is included.

The structural plywood of the present invention has the effect of improving the horizontal resistance performance as compared with a structural plywood composed only of a wood-based board, since a porous steel plate is interposed in the laminate.
In addition, the display portion of the structural plywood is a position display for using the hole of the porous steel plate as a mounting hole when the structural plywood is fastened to the frame, and the porous steel plate is laminated on the middle or the back side. However, there is an effect that the position of the hole can be easily determined from the surface side, and at the same time, the fixing strength is improved by using the hole as the mounting hole.

  Further, the present invention includes a configuration in which the porous steel sheet is interposed between the plurality of wood-based plate members, and is integrally bonded and fixed with an adhesive.

  Since the structural plywood of the present invention has a laminated structure in which a porous steel plate is interposed between a plurality of wood-based planks, it is not necessary to pay much attention to the front and back of the structural plywood in appearance. Moreover, when nails or screws are used because the surface of the structural plywood is a wooden board, there is an effect that the tip is easy to enter and that the head hardly projects from the surface of the front side board.

  The present invention includes a configuration in which the display unit is configured such that a surface portion of the laminate is formed in a circular concave shape in a front view.

  In the structural plywood of the present invention, since the display portion for displaying the position of the hole serving as the mounting hole of the structural plywood is formed in a concave shape, the heads of nails, screws, and the like further protrude from the surface. Difficulty has the advantage of not affecting the interior material for finishing.

  The present invention includes a configuration in which a pilot hole which is communicated with the hole and which can be used for nailing or screwing is formed in the display unit.

  The structural plywood of the present invention has improved workability of fastening the structural plywood to the frame, and in detail, since the pilot hole is open, it is easy to fasten nails and screws at the work site. There is an effect.

  In the present invention, the pilot hole is the display portion located at a peripheral edge portion of the structural plywood, and can secure a fixing strength for fixing the structural plywood to a frame or the like, and a wall structure And a structure formed at a required interval capable of obtaining the structural strength as described above.

  The structural plywood of the present invention eliminates the need for pre-measurement and marking of required fastening positions such as nails and screws at the work site due to fixing strength and the like, and also prevents forgetting to stop nails and screws and the like. effective.

  The present invention includes a configuration having a flange formed such that an inner peripheral edge of the hole projects substantially perpendicularly to the porous steel plate.

  The structural plywood of the present invention has a flange portion, which serves as a guide when fastening with an attachment component such as a nail or a screw, or is fixed by contact between a body portion such as a nail or a screw and the flange portion. The effect of improving the strength, and furthermore, since it is projected from the perforated steel sheet, it is firmly bonded to the wood-based board, so that the effect of preventing the structural plywood from warping or peeling can be obtained.

  INDUSTRIAL APPLICABILITY The structural plywood of the present invention has a higher fixing strength to a frame or the like, a higher horizontal resistance performance as a surface material for a load-bearing wall, and a higher workability than conventional plywood, which is effective in reducing construction costs.

It is a partially cut front view showing the state where the structural plywood concerning the present invention was fastened to the frame. It is sectional drawing of the structural plywood in which the perforated steel plate was interposed between the wood-based board | plate materials. It is sectional drawing which shows one Embodiment of the structural plywood provided with the display part on the front and back. It is sectional drawing of the structural plywood which shows other embodiment of the display part based on FIG. It is sectional drawing of the structural plywood which shows the state which prepared the pre-drilled hole in the structural plywood according to FIG. It is an expanded partial sectional view showing the state where the flange part was provided in the perforated steel plate. It is an expanded partial sectional view showing the state where the flange part was provided in the front and back of a porous steel plate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the drawings are schematically shown, and do not always correspond to actual dimensions and ratios. Further, the drawings may include portions having different dimensional relationships and ratios.
In the present embodiment, the structural plywood viewed from the outside of the building with the structural plywood 1 fastened to the frame 2 is referred to as a front side or a front side, and the opposite side is referred to as a back side or a back side.

(Embodiment)
FIG. 1 shows a state in which the structural plywood 1 is fastened to the frame 2 with nails 3, and the structural plywood 1 is formed in a rectangular shape in a front view. At the peripheral edge of the front and back surfaces of the structural plywood 1, a display portion 4 indicating the position of the hole 7 of the perforated steel plate 6 is formed. Further, the positions of the holes 7 other than the peripheral portion are indicated by the intersections of the line portions 5 displayed so as to connect the respective display portions 4.

  FIG. 2 shows an example of a cross-sectional view of the structural plywood 1. The structural plywood 1 is formed by laminating two wood-based plate materials 8 and one porous steel plate 6. And bonded with an adhesive, and heated and pressed to form an integral body. The wooden board 8 is formed of a plywood in which wooden boards 9, 10, and 11 are bonded. In the porous steel plate 6, holes 7 penetrating a thin metal plate are formed at regular intervals.

  3 and 4 are cross-sectional views showing an embodiment of the display unit 4 of the structural plywood 1. The display unit 4 of the embodiment according to FIG. Is formed in the wood board 9 located directly above the hole 7 located in the shape of a circle in a front view, and a concave shape vertically processed in a height direction in a side view. The display unit 4 of the embodiment according to FIG. 4 is formed in a concave shape in which the height direction is tapered in side view.

  FIG. 5 is a cross-sectional view showing the structural plywood 1 in a case where the pilot hole 12 is formed. A pilot hole 12 communicating with the hole 7 and penetrating the structural plywood 1 is formed in a direction parallel to the direction. The lower hole portion 12 can secure the fixing strength for fixing the structural plywood 1 to the frame 2 among the display portions 4 located at the peripheral edge of the structural plywood 1 and obtain the structural strength as a wall structure. It is formed at required intervals.

  As shown in FIGS. 6 and 7, the inner peripheral edge of the hole 7 of the porous steel plate 6 projects substantially perpendicularly to the porous steel plate 6, and a flange portion 13 is formed. The flange portion 13 protrudes in a direction from the front side to the back side of the structural plywood 1 in the hole 7 located at the peripheral edge of the structural plywood 1, and partially reverses in the hole 7 other than the peripheral edge. It is formed to protrude.

  As the wood-based board 8 constituting the structural plywood 1 of the present invention, for example, a plywood in which a plurality of wood boards 9, 10, 11 are combined, a wood chip board, a wood fiber board, a veneer and the like can be used. . Further, as the porous steel plate 6, for example, a plate material such as iron, aluminum, an alloy thereof, or brass can be used.

  In order to manufacture the structural plywood 1 of the present invention, a prepared hole is formed in a thin metal plate by pressing or the like, and the flange portion 13 is formed by burring to erect the porous steel plate 6. At the time of burring, for example, by using a shell-shaped punch and ironing the thickness of the perforated steel sheet 6 from T1 to T2, the flange portion 13 can also be formed into a sharp and sharp shape in which the material is stretched. The inner diameter of the hole 7 is formed to a required inner diameter that substantially abuts the outer diameter of the body of the nail 3 used when the structural plywood 1 is fastened to the frame 2.

  Next, an adhesive is applied to both sides of the perforated steel sheet 6, and the wooden board 8 is laminated on both sides thereof. The laminate is pressed integrally with a press or the like while heating, and the laminate is integrally fixed. Form into shape. In addition, the display unit 4 may be formed by cutting instead of pressurizing. Further, the line portion 5 may be formed by pressurization similarly to the display portion 4, or may be displayed by printing with ink or the like. Finally, the pilot hole 12 may be formed by cutting at a required interval in the display portion 4 located at the peripheral edge of the structural plywood 1, and the interval is specified, for example, by the Japanese Agricultural Standards (JAS standard). What is necessary is just to form so as to satisfy the specified interval and strength.

  When the structural plywood 1 of the present invention is used in a rectangular shape without being cut, all the prepared holes 12 formed in the peripheral portion may be fastened with nails or screws. On the other hand, when cutting and using the shape according to the shape of the frame 2, the position to be fastened is determined with reference to the position of the hole 7 displayed at the intersection of the line 5.

  Hereinafter, although an example of the present invention is described, the present invention is not limited to the following example, and can be appropriately modified and implemented within the scope of the invention.

  In order to implement the structural plywood 1 of the present invention, the total length was 2730 mm, the width was 1820 mm, and the thickness was 12 mm. The perforated steel plate 6 is a 0.8 mm thick iron plate, on both sides of which a thin layer of red pine, which is a wood-based plate material 8, is laminated, and an adhesive is applied between the respective plate materials. Heated and fixed together.

  A pilot hole 12 was formed in the periphery of the structural plywood 1 at intervals of 100 mm or less, and the inner diameter of the hole 7 was set to 2.8 mm. The nail used to fasten the structural plywood 1 to the frame 2 was a thick iron round nail having a body diameter of 2.87 mm in accordance with JIS standard CN50 (JISA5508).

  As described above, the structural plywood 1 of the present embodiment and the examples uses the holes 7 when fastening to the frame 2 and the like, so that the fixing strength to the frame 2 and the like and the load-bearing wall are higher than those of the conventional structural plywood. Since the horizontal resistance performance as the surface material is high and the workability is good, there is an effect of reducing the construction cost.

  In addition, by setting the inner diameter of the hole 7 to a required inner diameter that substantially abuts the outer diameter of the torso of the nail 3 to be used, the fixing strength to the frame 2 and the like and the horizontal resistance performance as a load-bearing wall surface material are improved. There is an effect of increasing. Furthermore, since the flange portion 13 is formed so as to protrude from the front side to the back side of the structural plywood 1 in the hole 7 located at the peripheral edge of the structural plywood 1, Since the nail 3 is driven in from the side, it serves as a guide for driving the nail and has an effect of improving workability.

  Furthermore, by having the flange portion 13, when the structural plywood 1 is prepared, the flange portion 13 is hardened by the wood-based plate material 8 and firmly bonded, thereby preventing the structural plywood 1 from being warped or peeled. At the same time, by increasing the area where the height h of the flange portion 13 comes into contact with the outer diameter of the body of the nail 3, even if the thickness T1 of the porous steel plate 6 is set to be thin, the fixing strength to the frame 2 and the like, and the proof stress Since the horizontal resistance performance as a wall surface material can be secured, there is an effect that the material cost can be reduced.

As described above, the best configuration, method, and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited thereto.
For example, in the above embodiments and examples, the wood-based board 8 is a plywood in which a plurality of wood boards 9, 10, 11 are combined, but a wood chip board, a wood fiber board, a veneer, or the like can be used.

  Further, in the above embodiments and examples, all the holes 7 are small holes having a substantially circular shape in a front view. However, the present invention is not limited to this. For example, some holes 7 are formed into polygonal holes in a front view. It may be formed, and the shape is not particularly limited.

  Further, in the above embodiments and examples, the positions of the holes 7 other than the peripheral edge of the structural plywood 1 are displayed at the intersections of the line portions 5, but the present invention is not limited to this. The display may be the same as that of No. 4, and the shape is not particularly limited.

DESCRIPTION OF SYMBOLS 1 Structural plywood 2 Frame 3 Nail 4 Display part 5 Wire part 6 Perforated steel plate 7 Hole part 8 Wood-based board material 9, 10, 11 Wood board 12 Lower hole part 13 Flange part 14 Shoulder T1 Plate thickness T2 Flange plate thickness h Flange height

Claims (3)

A structural plywood attached to a frame of a wall structure constituting a building, comprising a plurality of wood-based plate members, and a perforated steel plate including a thin plate-shaped steel member having a large number of at least one small hole. Wherein the porous steel plate is interposed between a plurality of wood-based plates, and the positions of the holes in the porous steel plate are displayed over the entire surface of the laminate. A structural plywood characterized by being made. The Display is structural plywood according to claim 1, characterized in that the surface of the laminate does not have a through-hole in the surface of the laminate appears by being formed in a circular concave shape .   The inner peripheral edge of the hole has a flange portion protruded, the hole located at the peripheral edge of the structural steel plate is provided in a direction from the front side to the back side of the structural plywood, except for the peripheral edge portion. 3. The structural plywood according to claim 1, wherein a part of the located hole portion protrudes from a rear side of the structural plywood toward a front side. 4.

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