JP4814612B2 - Reinforced wood and base frame and base-isolated base structure - Google Patents

Description

  The present invention relates to a reinforced wooden material, a base frame, and a base-isolated base structure constructed by reinforcing a strength of a rectangular steel plate by covering a thin steel plate.

  In wooden construction, a foundation as a horizontal structural member is placed on a foundation structure such as a cloth foundation, and the lower part of each standing pillar is connected to the foundation side separately to support the upper load on the foundation structure side. Such a structure has been conventionally employed.

On the other hand, as an earthquake-resistant construction method for a wooden building, for example, as disclosed in Patent Document 1 below, a pillar or beam made of wood is placed in a hollow steel material whose cutting surface has a square shape, and a fixing tool is placed on a base or the like. There are already proposals to fix them.
JP 2001-254439 A

  For this reason, according to the construction method disclosed in Patent Document 1, it is possible to increase the strength against twisting of the building and to impart excellent earthquake resistance.

  However, the construction method disclosed in Patent Document 1 relates to columns and beams, and has a disadvantage that it cannot be applied to a foundation structure including a foundation in wooden construction.

  Further, if a foundation structure including a foundation in a wooden building is constructed using a high-cost steel frame, there is a problem that the construction cost is increased as compared with the case of using wood.

  Furthermore, when building a foundation structure including a foundation using steel frames, it is necessary to connect the members using a joining method such as screwing or welding, which is cumbersome in terms of work and easy to work on site. There was also a problem. In particular, when H steel is used as the steel frame, there is a need for special rust prevention treatment depending on the use site.

  In view of the above-mentioned problems when constructing a foundation structure including a foundation using a steel frame, the present invention can achieve the required strength and the suppression of cost increase in a prismatic wood as a main material. The purpose of the present invention is to provide a reinforced wooden material, a base frame, and a base-isolated base structure that can be connected to each other by joint joints and simple field work using nails and screws.

The present invention has been made to achieve the above object, and the first invention (a reinforced wood material) of the present invention is folded in the widthwise direction at a portion facing the lower side of the prismatic wood facing the foundation side. The most important feature is that a thin steel plate having a folded portion formed by repeatedly bending is integrally covered with the peripheral side surface of the prismatic wood .

In this case, it is preferable that the thickness of the thin steel plate is about 0.2 to 4.0 mm. Moreover, it is desirable that the thin steel plate has a reinforcing deformed portion in which a cross-sectional shape in a direction orthogonal to the length direction of the prismatic wood has an uneven shape .

  In addition, the second invention (base frame) is characterized in that the reinforcing wooden materials according to any one of claims 1 to 3 are connected in an appropriate combination and connected. In this case, it is also possible to reinforce the connecting parts between the reinforcing wooden materials by attaching accessory fittings having a corresponding shape determined by the relationship with the individual connecting parts.

Furthermore, the third invention (base-isolated base structure) is the foundation frame according to claim 4 or 5 , the concrete base formed in the ground direction of the site, and between the base frame and the concrete base. The seismic isolation means is arranged, and the seismic isolation means is connected and supported in a dotted manner with respect to the folded portion of the sheet steel plate provided in the base frame. To do.

Among the present inventions, according to the first invention, a relatively cost-effective high strength is obtained by integrally covering a sheet steel plate having a folded portion formed by repeatedly bending in the width direction on the prismatic wood side. An inexpensive reinforced wood material can be provided. Moreover, it can connect stably, providing the seismic isolation function more effective with respect to the seismic isolation means side via a folding | turning part. In this case, if a thin steel plate having a plate thickness of about 0.2 to 4.0 mm, preferably about 0.4 to 2.5 mm is used, the covering work on the prismatic wood can be performed relatively easily. Moreover, if the said thin steel plate uses the thing which has a reinforcement deformation | transformation part in which the cross-sectional shape in the direction orthogonal to the length direction of prismatic timber exhibits uneven | corrugated shape, the intensity | strength can be raised more reliably. .

  In addition, according to the second invention, since the foundation frame body can be formed by appropriately combining the above-mentioned foundation wood materials, it is compared with the case where the prism frame wood is connected to the H steel to form the foundation frame body. Thus, the necessary strength can be secured while effectively contributing to cost reduction. In this case, if the accessory metal fitting is attached and reinforced, the foundation frame can be formed with higher strength.

Furthermore, according to the third invention, since the base frame side and the base frame side are connected and supported separately by the seismic isolation means disposed between the base frame and the concrete base, A seismic isolation effect can be preferably given to the base frame body side through the support part. In this case, thin steel sheet, the facing portions of the lower surface of the prismatic timber facing the basic side, is provided with the folded portion formed by repeating the folding of the lateral width direction, seismic isolation and through the該折return part By connecting to the means side, a more effective seismic isolation function can be provided.

FIG. 1 is an explanatory view showing a cross-sectional structure of an example of the first invention (reinforced wood material). According to the figure, the reinforced wooden material 11 covers 0.2 side surfaces of the prismatic wood 12 having an appropriate length and the four side surfaces of the prismatic wood 12, the upper side surface 13 → the left side surface 14 → the lower side surface 15 → the right side surface 16. It is comprised with the thin steel plate 22 of thickness of about -4.0 mm, more preferably about 0.4-2.5 mm. In this case, it is desirable that the thin steel plate 22 is subjected to an appropriate rust prevention treatment such as plating treatment so that the initial strength can be maintained over a long period of time.

The thin steel plate 22 is covered with the prismatic wood 12 by bringing the steel plate 22 into close contact with the four side surfaces of the prismatic wood 12 and then integrating them with a fastening material such as a nail. Yes .

In addition, the thin steel plate 22 is formed by providing a plurality of folded portions 23 that repeat the bending in the lateral width direction at the site facing the ground side of the site located on the lower side surface 15 of the prismatic wood 12.

As the thin steel plate 22 in the example shown in FIG. 1, as shown the reinforcing deformed portion 24 cross-sectional shape in a direction orthogonal to the lengthwise direction of the prismatic timber 12 exhibits an irregular shape, for example FIGS. 2 (a) and a rectangular waveform, it is also possible to use those formed by granted an appropriate uneven shape including a sawtooth waveform shown in (b).

Figure 3 is a plan view showing an example of the second aspect of the invention (base for frame), the entire foundation for the frame 31, in addition to reinforcing the wooden material 1 1 shown in FIG. 1, FIG. 2 (a), the It can be formed by appropriately combining the reinforcing wooden material 11 provided with the thin steel plate 22 having the reinforcing deformation part 24 as illustrated in (b) and connecting it in a frame shape.

  Further, the base frame body 31 is integrated by adding an accessory metal fitting 34 having a structure as appropriate according to the situation of the connecting portion between the one reinforcing wooden material 11 and the other reinforcing wooden material 11. It is desirable to form the connection portion with a higher connection strength.

FIG. 4 is an explanatory view showing an example of the structure of the accessory metal fitting 34 used for the base frame 31, of which (a) is a hollow rectangular tube arranged as shown on the right side of the upper side in FIG. 3 . (B) is an I-shaped part arranged as shown at the lower side in FIG. 3 by providing a notch 36a in a part of (a), for example, a part of the upper surface. Each of the accessory fittings 36 is shown.

FIG. 4 (c), as shown in the upper left corner of FIG. 3 shows a hollow square tubular L-shaped combination thereof fitting 37 disposed at a corner portion 32 of the base for frame 31. The L-shaped combination thereof fitting 37, as desired, can also be provided a notch in an appropriate position in the same manner as FIG. 4 (b).

4 (d) shows three reinforcements which are located on the base frame 31 and are connected to each other in a T-shape as shown in the substantially middle part of the upper side of FIG. A hollow rectangular tube-shaped T-shaped accessory metal fitting 38 that reinforces the connecting portion of the wood material 11 is shown. The T-shaped combination thereof fitting 38, as desired, can also be provided a notch in an appropriate position in the same manner as FIG. 4 (b).

Further, FIG. 4 (e) other from both sides to one of the reinforcing wood material 11 elongated, located in a substantially central portion In the base for frame 31 in FIG. 3 of the reinforcing wood material 11 A hollow square tubular cross-shaped accessory metal fitting 39 is shown which reinforces four connecting portions that are connected to each other in a state where the end faces 17 are brought into contact with each other and butted in a cross shape. Cruciform won game fitting 39 can also be provided a notch in the same manner appropriate position and FIG. 4 (b).

FIG. 5 is an explanatory diagram showing an example of the third invention (base-isolated base structure), a foundation frame 31 according to the second invention, and a concrete base 42 formed in the direction of the ground surface 41a of the site 41. The whole is composed of the base frame 31 and the seismic isolation means 45 disposed between the concrete base 41.

  In this case, the concrete base 42 is formed by placing concrete in an appropriate thickness on the ground 41a of the site 41 having an area determined by the relationship with the foundation frame 31 of a building (not shown) instead of the cloth base. Is done.

  Further, as the seismic isolation means 45, those having an appropriate structure can be used. However, at least a column part 46 that is freely extendable and is provided with appropriate flexibility can be used. The base part 47 attached to the lower end side of the column part 46 and fixed to the concrete base 42 and the turn-up part 23 side of the thin steel plate 22 attached to the upper end side of the column part 46 are freely connectable. What is provided with the support connection part 48 formed in this is used.

  Next, regarding the present invention having the above-described configuration, first, the operation and effect of the reinforced wooden material 11 according to the first invention will be described. Thus, it is possible to provide the inexpensive reinforcing wood material 11 with increased strength and relatively low cost.

  Moreover, when the thin steel plate 22 having a plate thickness of about 0.2 to 4.0 mm is used, the covering work for the prismatic wood 12 can be performed relatively easily. In addition, when the thin steel plate 22 having the reinforced deformation portion 24 in which the cross-sectional shape in the direction orthogonal to the length direction of the prismatic wood 12 has the uneven shape as shown in FIGS. Can be raised more reliably.

In addition, thin steel plate 22, the face portion of the lower surface 15 of the prismatic timber 12 facing the basic side, is provided with the folded portion 23 formed by repeatedly folding in the width direction, the該折return part 23 For example, it can be stably connected to the seismic isolation means 45 shown in FIG. 5 while providing a more effective seismic isolation function.

  Further, the operation and effect of the foundation frame 31 according to the second invention will be described. Since the foundation wooden body 11 can be formed by appropriately combining the base wood material 11 into a surrounding frame shape, Compared to the method of forming a frame for foundation by connecting prismatic wood to H steel, which is performed as a construction method, H steel is unnecessary and a prismatic wood 12 having a relatively small square size can be used. The required strength can be secured while effectively contributing to cost reduction.

In this case, if the accessory metal fittings 34 as illustrated in FIGS. 4 (a) to 4 (e) are separately attached to the corresponding connecting portions of the base frame 31 and reinforced, the strength can be further improved. Since the foundation frame 34 that also serves as a foundation can be provided, the construction cost can be greatly reduced.

  Further, the operation and effect of the seismic isolation base structure according to the third invention will be described. The seismic isolation means 45 interposed between the base frame 31 and the concrete base 42 is provided by the reinforcing wooden material 11. Since it is connected and supported in a dotted manner with respect to the provided thin steel plate 22 side, a seismic isolation effect can be preferably given to the foundation frame body 31 side through each of the dotted support portions.

In this case, the thin steel plate 22 is provided with a turn-up portion 23 at a portion facing the lower side surface 15 of the prismatic wood 12 facing the base side, so that the support connecting portion of the seismic isolation means 45 is provided via the turn-up portion 23. By connecting to 48, a more effective seismic isolation function can be given to the base isolation base structure including the base frame 31.

The above is the description of the present invention based on the illustrated example, and the specific content is not limited to this. For example, the reinforced wooden material 11 can be formed using a prismatic wood 12 having an appropriate corner size and length. The reinforcing wood material 11, in addition to the upper surface 13 of the prism material 11, the left side surface 14, lower surface 15, also the right side 16, in relation to the coupling structure between each of the other members, one thin steel plate 22 It is also possible to expose all or part of one side as a three-side covering structure of a type that does not cover the entire surface or covers the entire surface. By doing so, the connection work with the vertical column, the connection work with the other reinforcing wooden material 11 when the base frame 31 is assembled, and the connection work with the seismic isolation means 45 side can be carried out smoothly and easily. Will be able to do.

  Furthermore, the base frame 31 may be any shape as long as it has a plane shape of an appropriate size determined in relation to the area of the site, and the accessory metal fitting 34 is not limited to the illustrated example. It can also be formed as a combination of cylindrical bodies having appropriate shapes that can correspond to the protruding corners and the entering corners.

  In addition, the base isolation structure has a base frame by installing base isolation means 45 at an appropriate position on the concrete base 42 so as to correspond to the surface size of the base frame 31 and the combination situation of the reinforced wooden material 11. What is necessary is just to connect and support the body 31. As the seismic isolation means 45 used in this case, a structure having an appropriate structure can be used as long as it can correspond to the structure of the connecting portion with the base frame 31.

Explanatory drawing which shows the cross-sectional structure about an example of 1st invention in this invention. The principal part expansion explanatory drawing which illustrates the sheet steel plate which has an uneven | corrugated shape as (a), (b) . The top view which shows typically an example of 2nd invention in this invention . Explanatory drawing shown as a structural example of the accessory metal fitting used for the frame for foundations according to a pattern as (a)-(e) . Explanatory drawing which shows an example of 3rd invention .

DESCRIPTION OF SYMBOLS 11 Reinforcement wood material 12 Square pillar wood 13 Upper side surface 14 Left side surface 15 Lower side surface 16 Right side surface 22 Sheet steel plate 23 Folding part 24 Reinforcement deformation part 31 Frame for foundation 32 Corner part 34 Accessories metal fittings 35 I-shaped accessory metal fittings 36 I L-shaped accessory bracket 36a Notch 37 L-shaped accessory bracket 38 T-shaped accessory bracket 39 Cross-shaped accessory bracket 41 Site 41a Ground 42 Concrete base 45 Seismic isolation means 46 Supporting portion 47 Base portion 48 Support connection portion

Claims (6)

A sheet steel plate provided with a folded portion that is repeatedly bent in the width direction is integrally covered with the peripheral side surface of the prismatic wood at a portion facing the lower surface of the prismatic wood facing the foundation side. Reinforced wood material.   The reinforced wood material according to claim 1, wherein a thickness of the thin steel plate is about 0.2 to 4.0 mm.   3. The reinforced wood material according to claim 1, wherein the thin steel plate has a reinforced deformed portion in which a cross-sectional shape in a direction orthogonal to a length direction of the prismatic wood has an uneven shape. A foundation frame body, wherein the reinforcing wooden materials according to any one of claims 1 to 3 are connected in an appropriate combination . The base frame according to claim 4, wherein a reinforcing metal fitting having a corresponding shape determined by a relationship with each connecting portion is attached to the connecting portion between the reinforced wooden materials and reinforced . A base frame according to claim 4 or 5, a concrete base formed in the ground direction of the site, and seismic isolation means disposed between the base frame and the concrete base. A seismic isolation base structure characterized in that seismic means are connected and supported in a dotted manner with respect to the folded portion of the thin steel plate provided in the base frame .

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