JP7224512B2 - Hagi board using solid wood - Google Patents

Description

TECHNICAL FIELD The present invention relates to a crossboard using solid wood.

In general, boards used for desk and table tops, rack shelves, etc., receive the load of the objects placed on them, and as a result, flexural deformation and deformation over time occur, so a certain level of strength (rigidity) is requested.

The plate material used as the above-mentioned board is a laminated wood processed using an adhesive, a piece of solid wood, or a slatted board using solid wood. It has the original texture of natural wood, such as a wooden board made of solid wood, and has a different appeal from laminated wood processed with adhesives. In recent years, using a single piece of solid wood has made the product more expensive, so instead of that, wooden boards made of solid wood have begun to be used more frequently. Coniferous trees will be used, contributing to forestry administration in Japan.

On the other hand, however, solid wood has the property of being susceptible to deformation due to factors such as humidity changes, temperature changes, and local loads. Specifically, drying shrinkage is more pronounced in flat-grained wood than in straight-grained wood, in high-density wood than in low-density wood, and in thicker wood than thin wood. I know it goes against

The above-mentioned girders made of solid wood are made by gluing the wood end surfaces, which are the side surfaces of the component materials, which are multiple solid long boards (forming unevenness on the wood end surfaces of the component materials to join the components together). , or glued together) to form a flat plate. For example, Japanese Unexamined Patent Application Publication No. 2002-300002 discloses a technique of using a shingle board made of such solid wood as a floor.

JP-A-2007-32026 (page 2)

In the floor shown in Patent Document 1, the girders are fixed to the girders with fasteners such as screws and nails so that the girders are supported by the strength of the girders (reinforcing materials). The structural strength of the floorboards made of shingles is increased. Such floors are made of solid wood, which has excellent durability against long-term loads from above, but is prone to deformation due to factors such as humidity changes, temperature changes, and local loads. Therefore, when a long plate material as each component is warped, the portion fixed by the fixture moves vertically, and a force is applied locally. In such a technique of Patent Document 1, the safting material and the girders are fixed from above and below with fasteners such as screws and nails, and the directions of locally applied forces are the same. As a result, the fixture may come off or break where it is fixed. Moreover, in order to reliably prevent warping, a large number of fasteners such as screws and nails are required, resulting in the problem of shortening the useful life of the girders.

The present invention comprises a plurality of solid long plate members that constitute a crossboard, a reinforcing member arranged across the constituent members, and a directional fixture such as a screw or nail. To provide a girder board using solid wood, which is fixed without using any hardening and has stable quality over a long period of time.

In order to solve the above problems, the girders using the solid wood of the present invention are:
A crossboard made of solid wood formed by connecting a plurality of long components arranged side by side,
A series of grooves are formed across the longitudinal direction of the elongated component on at least the back surface of the solid wood beam board so that a reinforcing material can be inserted from the longitudinal ends of the grooves. cage,
The groove has an opening width narrower than the width of the internal space, and a series of inclined surfaces extending in the depth direction are formed on both side surfaces of the internal space of the groove,
The reinforcing member has an outer surface shape that substantially matches the inner shape of the groove, and has a non-rectangular thin metal plate bar having a bent flange portion extending from the opening of the groove to the back surface of the component. consists of
At least a portion of the reinforcing member is engaged with the inclined surface to prevent separation from the groove, and the flange portion is screw-fixed to the rear surface of the constituent member to be disengaged from the groove in the longitudinal direction. is prevented and
A plurality of screw holes are provided in the flange portion in the longitudinal direction of the reinforcing member, and the screw holes are long holes extending in the longitudinal direction of the reinforcing member.
According to this feature, since the reinforcing member is engaged with the inclined surfaces of the series of grooves and is prevented from being detached from the grooves, even if individual warping forces are generated in each of the constituent members, the respective constituent members can be secured. The bar-shaped reinforcing material reliably prevents warpage on the back side.

The reinforcing member is characterized in that it is formed of a steel sheet.
According to this feature, since the reinforcing material has a strong elastic restoring force due to steel, not only can the warping of each component be reliably prevented on the back side, but also the strong elastic restoring force against the generated warping can be permanently applied. It is possible to give a warp restoration effect due to environmental changes such as humidity changes.

FIG. 2 is a perspective view showing the surface of a crossboard using solid wood in Example 1 of the present invention. FIG. 2 is a perspective view showing the back surface of the crossboard using solid wood in Example 1 with a part of one reinforcing member omitted. FIG. 4 is a diagram showing how a reinforcing material is inserted into a groove of a crossboard made of solid wood in Example 1. FIG. 4(a) and 4(b) are diagrams for explaining a warping state of a single constituent material before manufacturing a crossing board using a solid material in Example 1. FIG. 1 is a cross-sectional view of a front view showing a crossing board using solid wood in Example 1. FIG. 4(a) and 4(b) are cross-sectional views viewed from the front for explaining forces applied to constituent members and reinforcing members of the girders made of solid wood in Example 1. FIG. (a) to (c) are front sectional views showing modifications of the first embodiment. It is a perspective view which shows the back surface of the crossing board which uses the solid wood in a reference example. It is sectional drawing of the front view which shows the crossing board which uses the solid wood in a reference example. (a) and (b) are cross-sectional views viewed from the front showing how a reinforcing material is installed in a groove of a crossboard made of solid wood in a reference example.

A form for implementing a crossboard using solid wood according to the present invention will be described below based on an embodiment.

A crossing board using solid wood according to Example 1 will be described with reference to FIGS. 1 to 7. FIG. Hereinafter, the front side of the paper surface of FIG. 5 is defined as the front side (front side) of the girders, and the description will be made based on the vertical and horizontal directions when viewed from the front side.

As shown in FIG. 1, the girders 1 using solid wood according to the present embodiment (hereinafter simply referred to as ``girders'') are composed of a plurality of long planks made of solid natural cedar. , 11, . The wood grain direction of the structural members 11, 11, .

As shown in FIG. 2, a series of two grooves 2 are formed on the rear surface of the girders 1 so as to extend linearly across the longitudinal direction of the members 11, 11, . . . Both ends thereof are formed so as to open at the side ends of the girders 1, respectively, and a reinforcing member 3 is inserted and fixed along the longitudinal direction of the groove 2 (hereinafter, for the sake of simplification, one Only the groove 2 of ).

As shown in FIG. 5 , the grooves 2 have a back surface 22 substantially parallel to the front and rear surfaces of the crossboard 1 and a pair of grooves extending from the opening 21 toward the back surface 22 on both sides of the internal space. are partitioned by inner surfaces consisting of inclined surfaces 23, 23 (side surfaces) of . The width L1 of the opening 21 of the groove 2 is shorter than the width (inner space width) L2 of the inner surface 22 (L1<L2), and the groove 2 is formed in a substantially isosceles trapezoid shape in cross section. Further, on the back surface of the girdler 1, on the left and right sides of the opening 21 of the groove 2 in a cross-sectional view, enlarged grooves 4 that are shallower than the groove 2 and substantially parallel to the back surface of the girder 1 are continuously formed. It is

As shown in FIG. 5, the reinforcing member 3 is a bar made of a thin metal plate made of steel, the outer surface of the cross section of which is bent to follow the inner cross section of the groove 2 and formed into a hat shape. be. More specifically, the reinforcing member 3 abuts against the inner surface 22 of the groove 2 and the inclined surfaces 23 , 23 , and includes an inner fitting portion 31 that fits inside the groove 2 and along the enlarged groove 4 from the opening 21 of the groove 2 . and flange portions 32, 32 bent from the inner fitting portion 31 so as to extend in the left-right direction in a cross-sectional view. The inner fitting portion 31 of the reinforcing member 3 is configured by three plate portions in a substantially U-shaped cross section facing downward. 23, 23, and a pair of inclined surface plate portions 31B, 31B whose separation width is widened from the opening portion 21 toward the inner surface 22. As shown in FIG.
A plurality of screw holes 34 , 34 , . . . are formed in the flange portions 32 , 32 . The reinforcing member 3 is fixed to the back surface of the slat plate 1 by fitting the inner fitting portion 31 into the groove 2, and is additionally fixed by tightening the screw 33 (see FIG. 2). . The length of the reinforcement member 3 is substantially the same as the length of the joint plate 1 in the connecting direction. Furthermore, while it is preferable that the inner plate portion 31A of the inner fitting portion 31 of the reinforcing member 3 abuts on the inner surface 22 of the groove 2 in the assembled state, it does not necessarily have to abut.

Here, how to attach the reinforcing member 3 will be described. As shown in FIGS. 2 and 3, the inner fitting portion 31 of the reinforcing member 3 is inserted from the opening of the groove 2 on one end side of the connecting direction of the stiffening plate 1, and the reinforcing member 3 is inserted into all the constituent members 11, 11. , . . . are inserted into the screw holes 34, 34, . . . to fix it. In addition, in the state where the reinforcement member 3 is fitted in the groove 2, the inner fitting portion 31 can be It is held in the groove 2 and is prevented from being separated from the groove 2. - 特許庁

Further, as shown in FIGS. 2 and 3, the screw holes 34, 34, . . . . After the reinforcing member 3 is inserted, both ends of the slat plate 1 in the connection direction may be covered with a cover member (not shown).

Here, the warpage of the constituent material 11 will be described. Normally, the solid plate material shown in FIG. 4(a) warps as shown in FIG. 4(b) due to expansion and contraction due to aging, changes in temperature or humidity (hereinafter referred to as "external factors"). . In the case of drying shrinkage, both ends of the structural material 11 having a wooden surface warp in the connecting direction (the direction intersecting with the grain direction) of the surface of the structural material 11 .

As shown in FIG. 6A, when the reinforcing member 3 is fitted into the groove 2, the inclined surface plate portions 31B, 31B of the inner fitting portion 31 are locked along the inclined surfaces 23, 23, respectively ( ), and the back surface plate portion 31 A is in contact with the back surface 22 . Accordingly, when an upward warping force F1 is generated in the constituent member 11, a downward force F2 acts on the reinforcing member 3 as a reaction force against the warping force F1. Since the inclined surface plate portions 31B, 31B and the inclined surfaces 23, 23 are engaged in a wide range in the longitudinal direction, the locally applied force can be dispersed, thereby suppressing warping of the component 11 due to external factors. (For simplicity, the forces F1 and F2 are shown only on the left side of the drawing).

Further, as shown in FIG. 6(b), since the flange portion 32 of the reinforcing member 3 is fixed to the beam plate 1 by the screw 33, the component member 11 is subjected to a horizontal rightward (inward) warping force F3. When this occurs, a horizontal leftward (outward) force F4 acts on the body of the screw 33 as a reaction force against the warp force F3. Therefore, the force that deforms the reinforcing member 3 inward can be suppressed, and the original shape can be maintained (For simplification, the forces F3 and F4 are illustrated only for the left side of the drawing).

As described above, the slanting plate 1 of the present invention has the inclined surface plate portions 31B and 31B of the inner fitting portion 31 of the bar-like reinforcing member 3 along the inclined surfaces 23, 23 of the series of grooves 2 formed on the back surface. 31B are locked to prevent separation from the groove 2, so that even if individual warping forces are generated in the constituent members 11, 11, . . . In order to prevent this, the constituent members 11, 11, . It is possible to obtain the girders 1 of stable quality over a long period of time by fixing them without using fixtures having directionality (particularly in the vertical direction) such as nails.

Further, on the back surface of the slatted plate 1, a reinforcing member 3 is inserted along the longitudinal direction of the slatted plate 1 into the groove 2 formed so as to penetrate both ends in the substantially connecting direction of the slatted plate 1. Therefore, the reinforcing member 3 can be fitted inside all the component members 11, 11, .

In addition, since the width of the opening 21 of the groove 2 is shorter than the width of the inner surface 22 and the groove 2 has a substantially isosceles trapezoidal shape in cross section, the shape of the groove 2 is simple, and the manufacturing cost can be suppressed. Detachment can be prevented by locking the groove 3 on the inclined surfaces 23, 23 of the series of grooves 2. As shown in FIG.

Further, since the reinforcing member 3 is a thin metal plate bar whose cross-sectional outer surface shape substantially matches the internal cross-sectional shape of the groove 2, the reinforcing member 3 is positioned between the inner surface 22 of the groove 2 and the inclined surfaces 23, 23. Because of the contact, not only is the contact area between the reinforcing member 3 and the groove 2 wide, but also both corners of the inner fitting portion 31 have acute angles, thereby providing durability against bending force due to warpage. Since the reinforcing member 3 is a thin metal plate bar, it can be temporarily deformed.

In addition, since the reinforcing member 3 is formed of a thin steel plate, the reinforcing member 3 has a strong elastic restoring force due to the steel, so that the warping of the constituent members 11, 11, . . . Not only that, it can permanently give a strong elastic restoring force to the generated warp, and can give a warp restoring effect due to an environmental change such as a humidity change.

Further, the flange portions 32, 32 of the reinforcing member 3 are inserted and screwed by a plurality of screws 33, 33, . . . into screw holes 34, 34, . It is possible to reliably prevent the reinforcing member 3 from coming off in the longitudinal direction of the groove 2. - 特許庁Since the flange portions 32, 32 extend so as to bend from a part of the reinforcing member 3 fitted in the groove 2, the contact area between the reinforcing member 3 and the constituent members 11, 11, . . . Alternatively, since the corners are formed in the metal plates that serve as the roots of the flanges 32, 32, it has excellent durability against bending force due to warping.

In addition, since the enlarged grooves 4 are shallowly formed on the left and right sides of the groove 2 in a cross-sectional view, the flange portions 32, 32 of the reinforcing member 3 and the screw heads of the plurality of screws 33, 33, . Since it protrudes downward from the back surface and is inconspicuous, it is excellent in appearance.

In addition, since the hogi board 1 is made by joining together constituent materials of cedar, which is a coniferous tree, it can be finished as a hogi board having a soft touch and a refreshing scent unique to cedar, and can be manufactured at a low cost. can be done.

A modification of the first embodiment will be described. It should be noted that the same reference numerals are given to the same components as those shown in the above embodiment, and redundant explanations will be omitted. As shown in FIGS. 7(a) and 7(b), the cross-sectional shape of the groove 2 of the girders 1 is not limited to a substantially isosceles trapezoid, and the opening width is smaller than the internal space width, and the groove 2a The inclined surfaces 23a, 23a may be partially formed inside. For example, the opening 21a extends upward for a predetermined length in the thickness direction of the crossboard 1, and the width extends toward the inner surface 22a. A widening shape or a substantially circular inner surface of the groove 2b may be used. Needless to say, the reinforcing members 3a and 3b are shaped so as to abut along the inner surfaces of the grooves 2a and 2b having the above shape.

Further, as shown in FIG. 7(c), two grooves 2c, 2c are formed in a V-shape, and two grooves 2c, 2c are erected in a V-shape with respect to the two grooves 2c, 2c. A reinforcing member 3c having two plate-like inner fitting portions 31c, 31c may be inserted.
[Reference example]

A cross plate according to a reference example will be described with reference to FIGS. 8 to 10. FIG. It should be noted that the same reference numerals are given to the same components as those shown in the above embodiment, and redundant explanations will be omitted.

As shown in FIG. 8, on the rear surface of the slatted plate 100, a groove 200 having an isosceles trapezoidal shape in cross section is formed so as to extend linearly in the substantially connecting direction of the slatted plate 100 and to close both ends thereof. A reinforcing member 300 is inserted along the longitudinal direction of the groove 200 .

As shown in FIG. 9, the reinforcing member 300 includes a pair of L-shaped angles 301, 301, which are thin metal plates made of steel having an L-shaped cross section, and a spacer 302 made of solid material disposed between them. , a bolt 303 and a nut 304 crimping them in the left-right direction, forming a substantially T-shaped bar.

How to attach the reinforcing member 300 will be described. As shown in FIG. 10(a), first, the extension pieces 301a, 301a extending in the left-right direction of the two L-shaped angles 301, 301 are brought into contact with the inner surface 202 and the inclined surfaces 203, 203 of the groove 200, respectively. After inserting the spacer 302 between the L-shaped angles 301 and 301, the body of the bolt 303 is moved left and right. Through the through holes 301b, 301b of the L-shaped angles 301, 301 and the through-hole 302a of the spacer 302, the L-shaped angles 301, 301 and the spacer 302 are inserted between the back surface of the head of the bolt 303 and the nut 304. are bolted so as to clamp (see FIG. 10(b)). In this way, the reinforcing member 300 can be attached and detached by assembling the parts constituting the reinforcing member 300 without inserting the reinforcing member 300 from one end side of the connecting direction of the groove 200 . Therefore, the grooves 200 are not formed in the side end faces of the girders 100, and the appearance is excellent.

In addition, since the work of attaching the reinforcing member 300 does not use screwing to the constituent members 11 themselves, a cross plate that reliably prevents the warping force generated in the constituent members 11, 11, . . . 100 can be achieved.

The lateral width of the extending pieces 301a, 301a of the L-shaped angles 301, 301 or the spacer 302 should be increased, and the total width of the extending pieces 301a, 301a and the spacer 302 should be the same as the width of the inner surface 202. When the spacer 302 is inserted between the L-shaped angles 301, 301 when the reinforcing material 300 is attached, the corners of the extending pieces 301a, 301a of the L-shaped angles 301, 301 are bitten into the inclined surfaces 203, 203. may be worn

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and any changes or additions within the scope of the present invention are included in the present invention. be

For example, in the above-described embodiment, the constituent material 11 is a long plate, and the wood grain direction coincides with the longitudinal direction. , and the grain direction may be any direction.

In addition, although the girders 1,100 are made of cedar, they are not limited to this, and may be made of coniferous or broad-leaved trees other than cedar, or may be made of non-solid wood such as plywood.

In addition, although the grooves are formed on the back surface of the girders 1 and 100, the present invention is not limited to this, and the grooves may be formed on the front surface of the girders.

In addition, although it has been described that two grooves are formed on the back surface of the girders 1 and 100, the number of grooves is not limited to this, and the number of grooves is set to 1 or 3 or more according to the use of the girders, and the grooves are inserted. The number of reinforcements used may also be adjusted accordingly.

Also, although the groove has been described as extending linearly in the connecting direction, the groove is not limited to this and may extend, for example, in a curved line.

Further, although the grooves 2, 2a to 2c are formed so that both ends thereof are opened at the side ends of the slat plate 1, the grooves 2, 2a to 2c are formed so that only one of the side ends is opened. may be

In addition to forming the grooves by cutting the back surface of the slat plate 1, 100, the groove is not limited to this. Grooves may be formed.

Further, the grooves 2, 2a-c may be covered with a cover member (not shown) to make the reinforcing members 3, 3a-c fitted inside inconspicuous, thereby improving the appearance.

Further, the enlarged groove 4 is excellent in appearance because the flange portions 32 of the reinforcing member 3 and the screw heads of the plurality of screws 33, 33, . . . Although described, the formation of the enlarged groove 4 may be omitted if not limited to this.

In addition, although it has been described that the length of the reinforcing member and the length of the slat plate 1, 100 in the connecting direction is substantially the same, the reinforcing member may be shorter than the slat plate. Two reinforcing members having a length of half or less of the length in the connecting direction of the girders may be inserted.

In addition, the reinforcing members 3, 3a to 3c are described as thin steel metal plate bars that are bent so that the outer surface shape of the cross section substantially matches the inner cross-sectional shape of the groove 2. In order to increase the strength of the reinforcing member, the thickness of the bar may be increased, or the reinforcing member may have a solid structure.

Further, although the reinforcing members 3, 3a, 3b have been described as having the flange portions 32, 32 screwed to the rear surfaces of the constituent members 11, 11, . . . The members 11, 11, . Furthermore, nails may be used instead of screws.

Further, as shown in FIG. 2, the reinforcing members 3, 3a to 3c are screwed in pairs at three locations on one reinforcing member 3. No need to screw anything.

Also, as shown in FIG. 8, the reinforcing member 300 is bolted to one reinforcing member 300 at three locations, but the bolts may be at any location other than three.

The reinforcing member 300 has a substantially T-shaped configuration in which a pair of L-shaped angles 301, 301 made of thin metal plates made of steel and a solid material spacer 302 inserted between them are bolted together. Although described as an example, the materials of the L-shaped angles 301 and 301 and the spacer 302 are not limited to this. You can omit it.

In addition, in FIG. 7(c), a modified example in which the two grooves 2 are formed in an inverted V shape has been described, but the present invention is not limited to this, and the grooves may be in an inverted V shape or a curved shape. There may be.

Further, in the reference example, the shapes of grooves and reinforcing members may be as shown in FIGS. 7(a) to 7(c).

1 Crossboard 2 Groove 3 Reinforcing material 11 Component material 21 Opening 22 Back surface 23 Inclined surface 31 Inner fitting part 31A Back surface plate 31B Inclined surface plate 32 Flange 33 Screw 34 Screw hole 100 Crossboard 200 Groove 202 Back surface 203 Inclined surface 300 Reinforcing member 301 L-shaped angle (reinforcing member)
302 spacer (reinforcing material)
L1 Width of opening 21 L2 Width of inner surface 22

Claims (2)

A crossboard made of solid wood formed by connecting a plurality of long components arranged side by side,
A series of grooves are formed across the longitudinal direction of the elongated component on at least the back surface of the solid wood beam board so that a reinforcing material can be inserted from the longitudinal ends of the grooves. cage,
The groove has an opening width narrower than the width of the internal space, and a series of inclined surfaces extending in the depth direction are formed on both side surfaces of the internal space of the groove,
The reinforcing member has an outer surface shape that substantially matches the inner shape of the groove, and has a non-rectangular thin metal plate bar having a bent flange portion extending from the opening of the groove to the back surface of the component. consists of
At least a portion of the reinforcing member is engaged with the inclined surface to prevent separation from the groove, and the flange portion is screw-fixed to the rear surface of the constituent member to be disengaged from the groove in the longitudinal direction. is prevented and
A crossboard made of solid wood, wherein a plurality of screw holes are provided in the flange portion in the longitudinal direction of the reinforcing member, and the screw holes are long holes extending in the longitudinal direction of the reinforcing member. 2. The girders according to claim 1, wherein said stiffeners are made of thin steel plates.

Images