JP2005155026A - Floor support member and floor support structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economically useful floor support member and a floor support structure using the same compensating the strength deflection and at the same time without bringing inconvenience in the floor finishing while leaving the handleability wooden products have. <P>SOLUTION: A counterboring 4 is provided leaving both end sides or a part 3 between the both ends on either upper and lower faces of core material 2 formed of wood or either one face and the counterboring 4 of the core material 2 and a substantially U-shaped reinforcing steel 5 corresponding to the length of the counterboring 4 covering at least one of side faces are fitted. The upper/under face of both end sides of the core material 2 or either one face and the upper/lower face of the flange 7 of the reinfircing shape steel 5 or either one face are positioned on a substantially the same plane. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a floor support member for a low-rise building and a floor support structure using the same, and more particularly to a floor support member effective for a floor of a wooden house or the like and a floor support structure using the same. .

  Conventionally, as a supporting member for a floor of a wooden house or the like, a lumber cut out from wood and processed into a predetermined size is generally used regardless of the conventional shaft assembly method, the framed wall method, or other methods. . There are many variations of the floor support structure and support method using these wood products, especially in the conventional frame construction method for each housing manufacturer (for example, issued by Japan Housing and Wood Technology Center (former construction) Supervised by the Ministry of Housing Bureau, Wooden Housing Promotion Office) "Summary of the 9th Wooden House Rationalization Certification System" (October 1998)) is, in short, an important part of structural strength, that is, the weight of the roof, walls, etc. The strength of the large cross section at the part that supports the load such as snow and the part that supports the seismic load and wind load, for example, right under the outer wall of the floor, right under the wall of the room, and around the stairs. The part that supports only the load on the floor on the surface of the floor in between is used to support the floor using a wooden member with a smaller cross section. The former is commonly called a beam, a torso, etc., and the latter is commonly called a floor joist. The dimensions and shape of these materials should originally be able to be calculated by structural calculation according to the building conditions of each building, but in reality, as described in the above references, each housing manufacturer It is decided as a general solution in the system.

  In addition, these wooden members must be connected to each other in order to construct a floor structure to ensure the performance required for the floor, but lessons learned from the 1995 Hyogoken-Nanbu Earthquake At present, it is a general technique to be connected through metal fittings called many joint hardwares.

  However, because wood has low strength, especially bending rigidity, when dealing with large spans (wide floor plan), wooden floor support members have to be made with members with very large cross sections in order to increase the cross-sectional performance of the members. It was necessary to use it, and the cost of the member was high, which was economically disadvantageous. In addition, since the member becomes large and the weight of the member itself becomes heavy, the workability is very poor, and the deflection due to its own weight often reduces the quality performance of the floor. From these problems, it has been practically difficult to realize a floor structure having a large span, specifically, a span exceeding 4 to 5 m, using a wooden floor support member.

  By the way, after the new construction, if there are significant defects such as tilt and deflection in the floor structure as the basic structure part of the house, according to the “Act on Promotion of Housing Quality Assurance” enforced in April 2000 For ten years, contractors have been obligated to take responsibility for warranty, and it has become increasingly difficult to ensure the quality of timber lumber products. Therefore, it is difficult to apply to a large span.

  As one of the methods for solving these problems, wooden members (also called engineering wood) such as structural laminated materials and structural veneer laminates (LVL) have been developed. Originally, these materials are products that have been devised and processed so that raw materials that could not be used for structural purposes can be used. Here, in order to cover the quality of raw materials, it is a product that gathers thin materials and integrates them using adhesives, but it is impossible to completely hide the quality of the materials, in addition to lack of strength, dryness The actual situation is that it is far from a complete solution because it suffers from deterioration in quality due to the shrinkage of the tree, high cost, poor distribution and other problems.

  As another method, a member in which wood (glued wood) is joined to the upper and lower flanges of a lightweight steel frame (I-shaped steel) has been proposed (reference: issued by Japan Housing and Wood Technology Center (former construction) Supervision of the Ministry of Housing Bureau, Wooden Housing Promotion Office) “Summary of the 9th Wooden House Rationalization Certification System” (October 1998)) p455). This member uses the high strength of steel and can solve the problem of bending rigidity, but it was originally developed for lightweight steel-framed houses, and it is a combination of conventional wooden floor support members. To construct the support structure, special hardware and bolts must be used, which is not only economically disadvantageous, but also a specially certified material (construction method), so it is inconvenient for contractors. The face remains a problem.

Furthermore, in recent years, a thin steel plate that can be used as a building material is formed into a substantially U-shape by bending, and a substantially C-shape having a lip portion formed by bending the front ends of the flanges toward each other. A steel truss joint structure in which a shaped steel member is configured and a wooden material is fitted in the shaped steel member has been proposed (for example, see Patent Document 1).
JP 2001-329654 A

  The joint structure of the steel truss in Patent Document 1 is intended for a roof frame of a building, and is not assumed to be used as a floor support member, and if it is used as a floor support member, Since the plate thickness step formed between the lip of the shaped steel member and the upper surface of the wooden material fitted inside causes a serious inconvenience of unevenness of the floor, it is used as a floor support member. I can't.

  The present invention has been made in order to solve the above-described problems. The ease of handling, which is the goodness of wood products, remains the same, and the lack of strength is compensated. At the same time, there is no inconvenience in floor finishing, which is economically advantageous. An object of the present invention is to provide a floor support member and a floor support structure using the same.

  The floor supporting member according to the present invention is provided with a carved portion on both the upper and lower surfaces or any one surface of the core made of wood, leaving both ends or both ends and a part therebetween, and carving the core A reinforcing shape steel made of a thin steel plate having a length corresponding to the length of the engraved portion covering at least one side surface and having a substantially U-shaped cross-section is attached, One of the surfaces and the upper and lower surfaces of the flange portion of the reinforcing structural steel or any one of the surfaces are positioned on substantially the same plane.

  Further, instead of the above substantially U-shaped reinforcing steel, the reinforcing steel was constituted by a hollow square steel made of a thin steel plate in which a flange portion opposed by a slit provided in the longitudinal direction of the upper side was formed. .

  The floor support structure according to the present invention is obtained by joining the end of the floor support member to a surrounding wooden floor support member or a floor support member.

The present invention is a composite member in which a steel member having a high bending stiffness is joined and integrated with the wooden member while retaining the features of a wooden member that is easy to use as a floor support member, and the bending stiffness, which is a weak point of wood, is reinforced. Needless to say, improvement in strength performance, it has become possible to provide a floor support structure for a large span floor, which has been difficult in the past, without increasing costs and reducing workability.
Further, according to the floor support member of the present invention, it is possible to suppress the deflection and deformation of the floor over a long period of time, and it is possible to obtain an effect of ensuring remarkable quality and performance improvement while ensuring the quality of the house.

  The floor support member according to the present invention has a length shorter than the length of the wooden core material on the upper or lower surface or any one surface of the core material made of wood (hereinafter referred to as a wooden core material) and does not reach both ends. A steel plate lip with a length that matches the length of the carved part of the wood core so that the carved part is formed in advance and covers the carved parts of the upper and lower surfaces of the wooden core and at least one side. It is possible to increase the stability and strength (flexural rigidity) of long-term dimensions and shape by fitting groove steel, groove steel, or upper gap square steel together with other wooden floor support members. It has a structure that can be easily joined and does not adversely affect the floor base.

  The inventors first studied the required performance required for the floor support member and the characteristics of the wood used. As a result, the inventors strengthened the bending rigidity, which is a weak point of wood, and improved the performance as a floor support member. In order to achieve this, it is necessary to reinforce the rigidity (strength) against bending as a composite member with other materials with high bending rigidity. Furthermore, this reinforcing material has a high Young's modulus and is lightweight and easy to use. In addition, it was thought that the desired performance could be realized by using a steel plate made of a thin steel plate that is easy to obtain and economical in terms of cost. In the course of this research, we also considered using steel sheets themselves as reinforcements, rather than thin steel shapes. However, although the steel sheets themselves showed some improvement in strength against bending, they achieved the desired level. Has been found to be problematic (for example, it is necessary to increase the thickness of the steel sheet and the practical weight is inferior because the weight of the floor support member becomes excessive), so the adoption in the present invention has been postponed.

The standard elastic modulus of wood lumber, for example, vegetation (Class 1 grade 1), is 1200KN / cm ² (Reference: “Wood structure design criteria, same explanation, one permissible stress and permissible strength design method-”) The Young's modulus of the steel sheet (steel) is 20,600 KN / cm ² (reference: “New steel for construction”, Steel Structure Publishing, 1998, p45). Therefore, it was considered that the purpose could be sufficiently achieved by using a member having a stiffening effect by a steel material. In addition, according to the Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1641 promulgated in November 2001, “Defining Technical Standards Required for the Structure of Thin Lightweight Steel Structures or Structural Methods of Buildings” In response to the legal recognition of a structural steel made of thin steel sheets that is optimal for achieving this purpose (grooved steel with a lip, grooved steel, or square steel), The present invention has been proposed.
The inventors have also studied the floor support structure, that is, the assembly and joining of the floor support members, and maintained the workability and economy without complicating the connection with the wooden floor support members. They proposed the shape and configuration of the floor support members that can be made.

In the production of the floor support member according to the present invention, first, the upper and lower surfaces of the wooden core material are shorter than the length of the wooden core material, and both ends are left in the range (hereinafter, the remaining portion is referred to as an exposed portion). A sculpture part is formed in advance. This sculptured portion is provided in order to properly fit and join a reinforcing steel shape made of a thin steel plate, which will be described later, to a wooden core. Then, by forming the depth of the carved portion corresponding to the plate thickness of the flange portion of the shape steel to be fitted, the exposed portion of the upper and lower surfaces of the wooden core material and the flange of the shape steel fitted to this The upper and lower surfaces of the portion can be positioned substantially on the same plane (hereinafter, referred to as a flat surface), and inconveniences such as unevenness do not occur when a floor base or ceiling base is formed.
Moreover, since the exposed portions are provided on both ends of the wooden core material, it can be handled in the same manner as a conventional wooden floor support member, so that it can be easily and easily joined to other wooden floor support members. .

  In addition, it is conceivable to provide a sculpture on the side of the wooden core material and fit the web part of the structural steel for reinforcement. However, it is not possible to obtain a remarkable effect on the installation of the structural steel and the development of strength reinforcement. If necessary, it may be provided but is not necessarily required. In addition, the sculpture forming means implemented in the present invention does not require a special technique, and may be a method generally used in wood processing.

  In addition, the wood core material used here does not specifically specify the tree species (material), and is not limited to the lumber lumber made of wood (matsu, hinoki, tsutsuga, etc.) that have been used in the past. There is no problem in achieving the object of the present invention even when a laminated material containing a tree seed material or the like (including a single-plate laminated material, so-called LVL) is used. If it dares to say, it is the floor support member of the present invention that can solve practical problems even with low quality wood.

  Next, the material of the lip groove steel, groove steel or square steel made of thin steel plate (strength of steel plate, type of surface treatment, etc.) applied to increase the strength (flexural rigidity) of the floor support member according to the present invention. ) And dimensional shape (cross-sectional shape, web height, flange width, lip length, plate thickness, etc.) are important points, but in practice there is no need to specify them in order to achieve the purpose. What is considered necessary for achieving and satisfying the desired strength performance of the member may be examined in advance and selected for use. For example, “Surface treatment thin plate lightweight steel for building structure” in the Japan Iron and Steel Federation product regulations is one of the preferred materials that can be used without problems, but here, a material with a strength of 400 Mpa is applied, Surface treatment includes surface treatment materials such as hot dip galvanizing, hot dip zinc-5% aluminum plating, 55% aluminum galvanizing.

  However, it is not necessary to be limited to this, such as a new shape steel manufactured by bending according to the shape and size of the wooden core, or a light weight shape steel for general structure (JIS G3350) that has been conventionally JIS-developed. New materials may be used. In addition, the dimensional shape is not particularly specified or limited, and as described above, the dimensional shape is suitable for fitting and joining with a wooden core material, and the shape that can obtain the necessary cross-sectional performance is cost and availability. It is sufficient to select and apply from other conveniences. In addition, the above-mentioned Japan Iron and Steel Federation product regulations stipulate a wide range of dimensions and shapes, which are useful as reference materials for selection.

  In addition, various technologies can be applied to the joining method of lip grooved steel, grooved steel or square steel made of thin steel sheet and wooden core material for strength reinforcement, but long-term quality stability In view of the above, at present, it is reliable and appropriate to use screws, nails and the like. In addition to screws, nails, etc., it is possible to apply technologies such as bolt joining and adhesion for joining thin steel plates and wooden cores. From the perspective of securing, it cannot be said to be a sufficient alternative technology.

  Furthermore, as an important component, the length of the lip channel steel, channel steel or square steel made of thin steel plate is fitted and joined to the carved parts provided on the upper and lower surfaces of the wooden core as described above. Therefore, it is essential to keep it shorter than the length of the wooden core. Thus, it is necessary to make the both ends of the wooden core material into a shape (exposed portion) in which the wood part is exposed at the time of joining. This is because by adopting such a shape, the floor support member of the present invention has a shape that is not different from the wooden floor support member that has been used at both ends, and can be easily joined to other wooden support members. Therefore, the effectiveness of the floor support member according to the present invention can be further enhanced.

Moreover, the floor support structure according to the present invention is a construction method in which the floor support member is connected to a surrounding wooden floor support member or the floor support members are connected to each other. Compared to a simple construction, it is possible to economically construct a lightweight and strong floor.
Here, as a joining means when connecting the floor support member of the present invention to the surrounding wooden floor support member, in light of the object of the present invention, the mutual wood parts are directly connected without using the joint hardware. For example, a simple method of making a joint by engraving or the like and fastening it by nail fastening or the like is possible, and it is also possible to fasten it via a joint hardware. Of course, screws or bolts if possible can be used instead of nails. Similarly, in the portion of the present invention that connects the floor support members, the purpose is to join the wood supports of the floor support members according to the prior art in exactly the same manner as described above. Can be reached.
Embodiments of the present invention will be described below.

[Embodiment 1]
1 is a perspective view of a floor support member according to Embodiment 1 of the present invention, FIG. 2 is a rear view of FIG. 1, FIG. 3 is a sectional view taken along line AA in FIG. 1, and FIG. is there.
In the figure, reference numeral 1 denotes a floor support member according to the present embodiment, which is fitted and joined to a wooden core 2 made of ordinary lumber lumber and a thin steel plate 2 as a reinforcing structural steel. The lip channel steel 5 is made of.

The wooden core material 2 is a rectangular section having a length L ₁ , a component h ₁ and a width W _1. Exposed portions 3 a and 3 b (hereinafter simply referred to as 3) having a length L ₂ provided on both end sides on the upper and lower surfaces thereof. In the meantime, a depth t ₁ (the depth t ₁ corresponds to the plate thickness t ₂ of the flange portions 7a and 7b of the lip groove steel 5) in the range of L _{3 in} the meantime. The sculptures 4a and 4b (hereinafter, simply referred to as 4) are formed.

The lip groove shape steel 5 which is a reinforcing shape steel has a length L ₄ which is substantially equal to the length L ₃ of the carved portion 4 of the wooden core material 2 and is the same web as the component h _{1 of} the wooden core material 2. It has a height h ₃ , and has flange portions 7 a and 7 b having a width W ₂ (W ₁ <W ₂ ) in the vertical direction and a plate thickness t ₂ , and the end portions of the flange portions 7 a and 7 b are almost perpendicular to each other inside. The lip portions 8a and 8b are formed by bending.

  In the floor support member 1 as described above, in order to attach the lip groove steel 5 to the wooden core material 2, the opening of the lip groove steel 5 is slightly opened so as not to obstruct the lips 8a and 8b. The wooden core 2 is inserted from one end, and the flange portions 7a and 7b are positioned on the carved portions 4a and 4b. At this time, the lip groove steel 5 returns to its original state due to the nature of its own spring back, covers one side of the wooden core material 2 and the carved parts 4a, 4b, and the flange parts 7a, 7b are the carved parts 4a, 4b.

  As a result, the upper and lower surfaces of the exposed portions 3a and 3b of the wooden core 2 and the upper and lower surfaces of the flange portions 7a and 7b of the lip groove steel 5 are substantially flush. This is to prevent problems such as unevenness in the floor base material (in some cases, the ceiling base material pasted under the floor support member 1) affixed on the floor support member 1. This measure is extremely important for practical use.

  The lip groove steel 5 attached to the wooden core 2 is fixed with screws 9 from the upper and lower flange portions 7a, 7b toward the upper and lower surfaces of the wooden core 2. In this case, it can be fixed with the screw 9 from the web 6 surface of the lip groove steel 5 toward the side surface of the wooden core 2. However, as described above, the flange portions 7a, 7a, It is important to fix 7b to the wooden core 2. For this purpose, it is desirable to first fix the flange portions 7a and 7b. In this case, further fixing the web 6 surface to the wooden core 2 improves the fixing degree and does not impair the effect of the present embodiment. Therefore, the web 6 surface may be fixed.

  The screw 9 used here is not particularly limited. However, the drilling tapping screw (JIS B 1059-2001) described in the notice regarding the thin plate lightweight steel structure or the Japan Iron and Steel Federation product regulations It is desirable to use a “steel house drill screw” that can be checked for quality. As for the fastening interval and number of screws 9, for example, in the case of the “steel house drill screw” in the above-mentioned Japan Iron and Steel Federation product regulations, the shear strength (proof strength) of the screw has been clarified beforehand. An interval that can secure the required strength on the member structure is determined by calculation, and the distance may be fixed as it is. In the present embodiment, an example is shown in which the screws 9 are fastened in one row, but this may be two rows or three rows if there is no structural problem by structural calculation (the following embodiments) The same applies to the above). The screws 9 (including nails 10 to be described later) for fixing the flange portions 7a, 7b of the lip groove steel 5 to the wooden core material 2 include the upper and lower surfaces of the flange portions 7a, 7b, and the exposed portions 3a, It is desirable not to protrude from the upper and lower surfaces of the flange portions 7a and 7b as much as possible by using, for example, a countersunk screw or the like so as to be flush with 3b (even in the following embodiments) The same).

The lip groove steel 5 has a length shorter than that of the wooden core 2. The exposed portions 3a and 3b in which the wooden core 2 is exposed are formed on both ends of the wooden core 2. The exposed portion 3a , the length L ₂ of the 3b can be appropriately determined within the range that can be bonded to the wood of the other members, not particularly defined.
Since the floor support member 1 according to the present embodiment is a composite member in which the wooden core material 2 and the lip groove steel 5 are integrally coupled as described above, the bending of the member is compared to the case of the wooden floor support member alone. The rigidity can be greatly increased. For this reason, a member applicable to a floor support structure with a large span could be realized with a minimum increase in weight and cost.

[Embodiment 2]
5 is a perspective view of a floor support member according to Embodiment 2 of the present invention, FIG. 6 is a rear view of FIG. 5, and FIG. 7 is a cross-sectional view taken along line BB of FIG. In addition, the same code | symbol as this is attached | subjected to the same part as Embodiment 1, or an equivalent part, and a part of description is abbreviate | omitted.
In the present embodiment, a structural laminated material is used for the wooden core material 2 and a grooved steel 11 made of a thin steel plate is used for the reinforcing structural steel. Other configurations are almost the same as those of the first embodiment. It is the same.

The structural laminated material used as the wooden core material 2 is a commonly used product, and, similarly to the case of muk lumber, the upper and lower surfaces thereof are preliminarily formed with the carved portions 4a and 4b except for the exposed portions 3a and 3b. The depth of the carved portions 4a and 4b is determined in accordance with the plate thickness of the flange portions 13a and 13b of the reinforcing grooved steel 11 to be attached, and the length range thereof is the same as the length of the grooved steel 11. It is decided by.
The grooved steel 11, which is a reinforcing structural steel, has the same web height as that of the wooden core material 2, the upper and lower surfaces of the exposed portions 3 a and 3 b of the wooden core material 2, and the flange portions 13 a of the grooved steel 11. It is attached so that the upper and lower surfaces of 13b are flush with each other. Instead of the groove steel 11, the lip groove steel 5 may be used as in the case of the first embodiment.

Unlike the case of the first embodiment, the grooved steel 11 is fixed to the wooden core 2 by using a nail 10 and fastened from the upper and lower flange portions 13a, 13b of the grooved steel 11 toward the wooden core 2. It is turned on. The nail 10 used here is not particularly limited, but as an example of the screw nail described in the notice regarding the thin plate light weight steel structure, “screw nail for steel house” in the Japan Iron and Steel Federation product regulations. It is desirable to use a device that can confirm the quality. What is necessary is just to respond | correspond similarly to the case of a screw | thread about the fastening space | interval of the nail | claw 10, and the number.
Also in the present embodiment, the same operations and effects as in the first embodiment can be obtained.

[Embodiment 3]
8 is a perspective view of a floor support member according to Embodiment 3 of the present invention, FIG. 9 is a rear view of FIG. 8, and FIG. 10 is a cross-sectional view taken along the line CC of FIG. Note that the same or corresponding parts as those in the second embodiment are denoted by the same reference numerals, and a part of the description is omitted.
In the present embodiment, the floor support member 1 is constituted by a solid wood core material 2 and a pair of reinforcing steel bars 11a and 11b attached to both sides thereof.

On the upper and lower surfaces of the wooden core 2, the depth corresponding to the total thickness of the flange portions 13 a and 13 c and 13 b and 13 d of the grooved steels 11 a and 11 b is left on the exposed portions 3 a and 3 b on both ends.挫 carved parts 4a, 4b are provided.
Of the pair of groove steels 11a and 11b for reinforcement, the web height of one groove steel (for example, 11a) is substantially equal to the formation of the wooden core 2 and the web of the other groove steel 11b. Is formed substantially equal to the height of the grooved steel 11a in the web.

To assemble the floor supporting member 1 according to the present embodiment, first, the grooved steel 11b is fitted from one side surface of the wooden core material 2, and the flange portions 13c and 13d are positioned on the carved portions 4a and 4b. Let Next, the grooved steel 11a is fitted from the other side surface of the wooden core material 2, and the flange portions 13a and 13b are overlapped on the flange portions 13c and 13d of the grooved steel 11b. At this time, the upper surfaces of the flange portions 13a and 13b of the channel steel 11a are substantially flush with the upper surfaces of the exposed portions 3a and 3b.
In this state, the grooved steel 11b positioned below the flanges 13a and 13b from above the flanges 13a and 13b of the grooved steel 11a by, for example, a plurality of screws 9 as in the first embodiment. Are fixed to the upper and lower surfaces of the carved parts 4a and 4b of the wooden core 2.

  The operation and effect of the floor material support member 1 according to the present embodiment are substantially the same as those of the first and second embodiments. In particular, in this embodiment, the reinforcing material is provided on both sides of the wooden core 2. Since the grooved steels 11a and 11b, which are shape steels, are attached, the strength against bending (bending rigidity) can be remarkably increased, and this can also be implemented in a large span floor support structure.

[Embodiment 4]
FIG. 11 is a perspective view of a floor support member according to Embodiment 4 of the present invention, and FIG. 12 is a cross-sectional view taken along DD in FIG. Note that the same or corresponding parts as those in the third embodiment are denoted by the same reference numerals, and a part of the description is omitted.
The present embodiment is constituted by a solid wood core 2 and groove steels 11a and 11b, which are a pair of reinforcing steels attached to both sides thereof.

On the upper and lower surfaces of the wooden core material 2, the carved portions 4 a and 4 b having depths corresponding to the plate thicknesses of the flange portions 13 a and 13 b of the grooved steels 11 a and 11 b are left on both end sides. Is provided.
Moreover, the same shape and the same dimension are used for a pair of reinforcing steel bars 11a and 11b, but the widths of the flange portions 13a and 13b are formed narrower than the width of the wooden core 2.

  In order to assemble the floor support member 1 according to the present embodiment, first, one grooved steel (for example, 11a) is fitted from one side surface of the wooden core, and the flange portions 13a and 13b are engraved portions 4a, 4b. At this time, the front edge part of the flange parts 13a and 13b may be located in the center part of the width direction of the wooden core 2, or may be located slightly outside. Then, for example, the flange portions 13 a and 13 b are fastened and fixed to the wooden core 2 with a plurality of screws 9.

  Next, the grooved steel 11b is fitted from the other side surface of the wooden core material 2, and the flange portions 13a and 13b are positioned on the carved portions 4a and 4b. At this time, the front end edges of the flange portions 13a and 13b may be brought into contact with the front end edges of the flange portions 13a and 13b of the other channel steel 11a, or may be positioned slightly outside and between them. A slight gap may be formed (FIG. 11 shows a case where a gap is provided between the two). Then, for example, the flange portions 13 a and 13 b are fastened and fixed to the wooden core 2 with a plurality of screws 9. In addition, after attaching one groove-shaped steel 11a to the wooden core 2 and temporarily fixing and fitting the other groove-shaped steel 11b, you may fix both to the wooden core 2 with the screw 9.

At this time, the upper surfaces of the flange portions 13a and 13b of the both channel steels 11a and 11b are substantially flush with the upper surfaces of the exposed portions 3a and 3b. For this purpose, it is desirable to select the two groove steels 11a and 11b having the same thickness of the flange portions 13a and 13b.
The operations and effects of the present embodiment are almost the same as those of the first to third embodiments.

[Embodiment 5]
13 is a perspective view of a floor support member according to Embodiment 5, FIG. 14 is a perspective view of a reinforcing member of FIG. 13, and FIG. 15 is a cross-sectional view taken along line EE of FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.
In the present embodiment, the floor support member 1 includes a wooden core material 2 having the same structure as the wooden core material 2 of the first embodiment, and a hollow square steel (hereinafter referred to as upper gap square steel) 15 having a gap 18 on the upper side. Is configured.

As in the case of the first embodiment, the wooden core material 2 has a depth corresponding to the plate thickness of the flange portions 19a and 19b of the upper gap square steel 15, leaving the exposed portions 3a and 3b on both end portions of the upper and lower surfaces. The sculpture parts 4a and 4b are provided.
The upper gap square steel 15 which is a reinforcing structural steel is made of a thin steel plate, has a length substantially equal to the length of the carved portions 4a and 4b of the wooden core 2, and the height of both side walls of the wooden core 2. A gap 18 is provided by a slit in the longitudinal direction of the central portion in the width direction of the upper side of the substantially equal hollow square steel, and flange portions 19a and 19b are formed on both sides thereof.

In order to attach the upper gap square steel 15 configured as described above to the wooden core 2, the flange portions 19a and 19b are slightly opened outwardly, fitted to the wooden core 2 from one end, and the carved engraved portion 4a and 4b are fed to place the bottom 16 and the flanges 19a and 19b on the carved portions 4a and 4b. At this time, the flange portions 19a and 19b return to their original state by their own springback and are located in the carved portion 4a.
In this state, the flange portions 19 a and 19 b of the upper gap square steel 15 are fixed to the wooden core 2 by, for example, a plurality of screws 9, and the bottom 16 is also fixed to the wooden core 2 by the plurality of screws 9. At this time, the upper surfaces of the flange portions 19a and 19b and the lower surface of the bottom portion 16 are flush with the upper and lower surfaces of the exposed portions 3a and 3b of the wooden core material 2, respectively.
The actions and effects of the floor support member according to the present embodiment are substantially the same as those of the first to fourth embodiments.

[Embodiment 6]
FIG. 16 is a perspective view of the wooden core of the floor support member according to Embodiment 6 of the present invention.
In the fourth and fifth embodiments, the chiseled portions 4a and 4b are provided on the upper and lower surfaces of the wooden core material 2, and between the flange portions 13a and 13a, 13b and 13b facing the reinforcing steel bars 11a and 11b, or The case where the clearance gap was formed between the flange parts 19a and 19b which the upper clearance square steel 15 opposes was shown.

In the present embodiment, ribs (exposed portions 3c) that are flush with the exposed portions 3a and 3b provided at both end portions at the center in the width direction of at least the upper surface of the wooden core 2 and that are continuous with the exposed portions 3a and 3b. ), And carved parts 4c and 4d are provided on both sides thereof.
Accordingly, the flange portions 13a and 13a of the groove steels 11a and 11b and the flange portions 19a and 19b of the upper gap square steel 15 are engaged with the carved portions 4c and 4d of the wooden core material 2, respectively. The upper surface of the substrate can be made flatter (level).

[Embodiment 7]
FIG. 17 is a perspective view of a floor support member and a perspective view of a wooden core material according to Embodiment 7 of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1-6, and description is abbreviate | omitted.
In Embodiment 1-6, although the exposed parts 3a and 3b were provided in the both ends part side of the wooden core 2, and the sculpture parts 4a and 4b were provided between them, the shape steel for reinforcement was shown, In the embodiment, a third exposed portion 3d is further provided between the exposed portions 3a and 3b provided on both ends.

  That is, the exposed portions 3a and 3b are provided on both ends of the wooden core 2, and a third exposed portion 3c is further provided between the exposed portions 3a and 3b. Between the exposed portions 3a and 3b and the third exposed portion 3d, respectively. The sculpture parts 4a and 4b are formed. In addition, although the figure showed the case where the 3rd exposure part 3d was provided in the intermediate part of both exposure parts 3a and 3b, it is not limited to this, If it is between both exposure parts 3a and 3b It can be installed anywhere.

And the lip groove steel 5, the groove steel 11 or the upper gap square steel 15 (however, in general, the reinforcing material described in the first to fifth embodiments is applied to the carved portions 4a and 4b of the wooden core 2. One of the lengths shorter than those of the first to fifth embodiments and corresponding to the length of the carved portions 4a and 4b), and fixed with screws 9 or the like. It is a thing.
In the floor support member 1 according to the present embodiment, since the third exposed portion 3d is further provided between the exposed portions 3a and 3b on both ends, the floor support member 1 is used as a wooden floor support member having a floor support structure. The floor support member 1 according to the first to fifth embodiments or the present embodiment can be joined to the third exposed portion 3d, thereby obtaining a stronger floor support structure. be able to.

In each of the above-described embodiments, the case where the sculptured part 4 is provided on the upper and lower surfaces of the wooden core material 2 has been shown, but the sculptured part 4 is provided only on either the upper surface or the lower surface for reinforcement. A shape steel may be attached.
In each of the above-described embodiments, the first and third to seventh embodiments use the wooden core material 2 made of muk lumber, and the second embodiment shows the case where the wooden core material 2 made of structural laminated material is used. However, these can be changed as appropriate, and other wooden cores may be used.

Furthermore, in fixing the shape steel for reinforcement to the wooden core material 2, although the screw 9 was used in Embodiment 1, 3-5, and 7, the case where the nail | claw 10 was used in Embodiment 2, these were shown. An example thereof is shown, and either screw 9 or nail 10 may be used depending on the situation.
Moreover, although Embodiment 3-5 showed the case where the clearance gap was provided between the both-sides wall of the wooden core material 2, the web inner wall of the grooved steel 11a, 11b, and the side plate inner wall of the top gap square steel 15. These web inner walls and side plate inner walls may be brought into contact with both side walls of the wooden core 2.
Moreover, you may comprise the floor support member 1 combining said each embodiment suitably.

Next, an embodiment of the floor support member according to the present invention will be described with reference to FIG. The present example is intended for the floor support member according to the first embodiment.
The wooden core material 2 is made of a material made of rice tsubo with a length L ₁ : 4.55 m, a height h ₁ : 23.5 cm, and a width W ₁ : 4 cm, and has a length L on both sides on the upper and lower surfaces. ₂ : Leaves exposed portions 3a and 3b of 15cm, and provides carved portions 4a and 4b of length L ₃ (L ₁ -L ₂ × 2): 4.25m, depth t ₁ : 1.6mm between them. It was.
The lip groove steel 5 is formed by bending a thin steel plate having a thickness t _{2 of} 1.6 mm, a length L _{4 of} 4.20 m, a web height h _{3 of} 23.5 cm, and a flange. A width W _{2 of} 5 cm was used.

With the opening of the lip groove steel 5 as described above opened, the wooden core 2 was inserted from one end, and the flanges 7a and 7b were fitted into the carved portions 4a and 4b. Next, 15 drilling tapping screws having a countersunk part on the head having a thread part length of 2 cm and a screw thread outer diameter of 4.8 mm are screwed onto the wooden core material 2 at intervals of 30 cm or less from the upper and lower flange parts 7a and 7b. The floor supporting member 1 was configured by inserting and fixing.
As a result, it has approximately 2.5 times the strength (bending rigidity) of a conventional wooden floor support member made of substantially the same material as the wooden core material 2 (however, no sculpture is provided). The floor support member 1 was obtained in which the upper and lower surfaces of the exposed portions 3a and 3b of the core material 2 and the upper and lower surfaces of the flange portions 7a and 7b of the lip groove steel 5 were flush.
The above-described embodiment shows an example, and it goes without saying that the dimensions and the like of each part can be appropriately changed.

[Embodiment 8]
Next, an example of a floor support structure using the floor support member 1 according to the present invention will be described.
FIG. 18 shows a floor support member 1 according to the present invention (in the figure, the floor support member 1 according to the first embodiment is shown but is not limited thereto) to the surrounding wooden floor support member 20. The state joined via the joint hardware 25 is shown.
The floor support member 1 is orthogonal to the wooden floor support member 20, and its upper surface (the exposed portion 3 and the flange portion 7 of the lip groove steel 5) is flush with the upper surface of the wooden floor support member 20. The end portion (exposed portion 3a) is brought into contact with the side surface of the wooden floor support member 20, and is fixed by screws, nails, and the like 26 with a metal fitting 25, and both are integrally bonded. Here, as the joint hardware 25, an angle-shaped hardware or a stool-shaped hardware can be used.

  A structural plywood or a similar base material 24 is attached to the upper surface of the floor support structure thus configured as a floor base. Thereby, since the exposed portions 3a and 3b are provided at the end portion of the floor support member 1, joining to the wooden support member 20 is extremely easy. In addition, since the floor support member 1 is reinforced with a reinforcing structural steel, the floor support member 1 is structurally stable without being bent or bent over a long period of time, and the top surfaces of the wooden floor support member 20 and the floor support member 1. Since it is flush, a floor support structure that does not cause problems such as uneven floors can be obtained.

  FIG. 19 shows another example of the floor support structure. In this example, a wooden floor support member 20 is provided with a joint portion 21 corresponding to the shape of the exposed portion 3a at the end of the floor support member 1 by carving, and the exposed portion of the floor support member 1 is provided in the joint portion 21. 3a is inserted so that the top surface thereof is flush with the top surface of the wooden support member 20, and screws, nails, and the like 26 are slanted and fastened and joined.

  FIG. 20 shows still another example of the floor support structure. In this example, the floor support member 1 according to the seventh embodiment is used in place of the wooden floor support member 20, and the third exposed portion 3d is shown. The end portion of the floor support member 1 is fitted to the side surface via the joint metal 25. According to this example, the strength (rigidity) of the floor support structure can be further increased.

  In the above description, the case where the floor support member according to the present invention is used in a floor support structure has been shown, but the present invention can also be applied to a ceiling base structure.

It is a perspective view of the floor support member concerning Embodiment 1 of the present invention. It is a rear view of FIG. It is AA sectional drawing of FIG. FIG. 2 is an exploded perspective view of FIG. 1. It is a perspective view of the floor support member concerning Embodiment 2 of the present invention. FIG. 6 is a rear view of FIG. 5. It is BB sectional drawing of FIG. It is a perspective view of the floor support member concerning Embodiment 3 of the present invention. It is a rear view of FIG. It is CC sectional drawing of FIG. It is a perspective view of the floor support member concerning Embodiment 4 of the present invention. It is DD sectional drawing of FIG. It is a perspective view of the floor support member concerning Embodiment 5 of the present invention. It is a perspective view of the top gap square steel which is a structural steel for reinforcement of FIG. It is EE sectional drawing of FIG. It is a perspective view of the wooden core material of the floor supporting member which concerns on Embodiment 6 of this invention. It is a perspective view of the floor support member which concerns on Embodiment 7 of this invention, and its wooden core material. It is explanatory drawing of an example of the floor support structure which concerns on Embodiment 8 of this invention. It is explanatory drawing of the other example of a floor support structure. It is explanatory drawing of the further another example of a floor support structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor support member, 2 Wooden core material, 3a-3d Exposed part, 4a-4d Corrugated part, 5 Lip groove shape steel, 7a, 7b, 13a, 13b, 19a, 19b Flange part, 9 screw, 10 nail, 11 groove Shape steel, 15 upper gap square steel, 20 wooden support members, 25 joint fittings.

Claims (3)

  The upper and lower surfaces of the core material made of wood or any one of the surfaces is provided with an engraved portion leaving both ends or both ends and a part between them, covering the engraved portion and at least one side surface of the core material A reinforcing steel plate made of a thin steel plate having a length corresponding to the length of the carved portion and having a substantially U-shaped cross section is attached, the upper and lower surfaces of either end of the core material, or one of the surfaces, and the reinforcing material A floor support member, wherein the upper and lower surfaces of the flange portion of the shape steel or any one of the surfaces is positioned on substantially the same plane.   Instead of the substantially U-shaped reinforcing shape steel, the reinforcing shape steel is constituted by a hollow square steel made of a thin steel plate in which a flange portion opposed by a slit provided in the longitudinal direction of the upper side is formed. The floor support member according to claim 1. The floor support structure characterized by joining the edge part of the floor support member which concerns on Claim 1 or 2 to the surrounding wooden floor support member or a floor support member.

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