JP5037294B2 - Shaft structure - Google Patents

Description

  The present invention relates to a beam member suitable for a wooden building.

  Conventional wooden construction is mostly based on the framed wall method (conventional method) and the framed wall method (2x4 method). Even if these methods are applied as they are, a large space is formed in the building. It is difficult to do. This is because it is necessary to arrange many braces and wall surfaces in a balanced manner from the viewpoint of ensuring earthquake resistance.

  Thus, for example, a sufficient space can be secured even in a wooden building by forming a truss with wood or using a large cross-section laminated lumber. Further, a frame structure or the like in which a wooden truss structure is simplified has been developed (for example, see Patent Document 1).

JP 2004-339777 A

  When trying to form a large space by a general framed wall construction method, by expanding the cross-sectional area of the beam member, to some extent the distance between the fulcrum of the beam member, in other words, between the column members over which the beam member is bridged Since the distance can be increased, as a result, a relatively large space can be formed in the building. However, as the cross-sectional area of the beam member increases, the weight of the beam member also increases, which causes various problems such as bending of the beam member and a decrease in yield strength, and it is extremely difficult to form a desired large space. .

  Also, according to the wooden truss structure, it is possible to secure a relatively large space in the building, but by forming the truss, the cross-sectional area of the beam members spanned in the span direction of the building is more than necessary. Become bigger. That is, a useless space is formed between the timbers constituting the truss, and the indoor space is compressed. In addition, there are many joints between the members that make up the truss, the frame work is complicated, and the joint hardware used for the joints inevitably increases, so the weight and cost of the beam members can be reduced. It is difficult.

  Furthermore, if a large cross-section laminated timber is used, it is possible to form a relatively wide space in the building, but the cross-sectional areas of the column members and beam members become large, making it difficult to reduce the weight. In addition, there is a problem that the construction cost becomes high.

  Moreover, according to the frame structure disclosed in Patent Document 1, it is possible to construct a building at a low cost by applying wood having a market standard size. However, the frame structure is also basically a wooden truss structure. Therefore, the cross-sectional area of the frame (beam member) spanned in the span direction is increased, and above all, it is very difficult to form a portion other than the roof and the wall surface in the building, that is, the second floor portion. Furthermore, because of its structure, it is difficult to secure a large space in the building, and the degree of design freedom is limited.

  Therefore, in view of the above problems, the inventor of the present application relates to a frame structure member for constructing a wooden building, in particular, a beam member capable of forming a large space easily and inexpensively in a building, As a result of intensive studies to provide a beam member provided with means for correcting the deflection when the beam member is bent, the present invention has been achieved.

That is, the frame structure of the present invention is
A pair of column members, a pair of girder members joined one by one to the upper end surface of each column member, and a beam member horizontally placed between the pair of girder members,
The beam members are respectively erected on both side edge portions on the upper surface side of the bottom plate material along the longitudinal direction of the bottom plate material and a long bottom plate material joined to each upper end surface of the pair of column members. A pair of side plates joined together, and a space is formed between the pair of side plates,
Inserting and joining the joint hardware fixed to the inner surface of the girder member into the concave groove provided on the end surface of the side plate member,
At least one fixed pulley disposed in the space portion with a rotating shaft penetrating the pair of side plates, and a wire that is attached to a lower portion of the fixed pulley and is stretched between the girder members And a bending correction means configured to include a tension means for tensioning the wire,
It is characterized by that.

Further, in the shaft assembly structure, the deflection correcting means can correct slack by lifting the beam member .

  In the beam member of the present invention, since the bottom plate material and the side plate material are joined in a state in which a space portion is formed between the side plate materials, an increase in the weight of the beam member can be suppressed while expanding the cross-sectional area of the beam member. . Therefore, when the beam member of the present invention is applied to a wooden building as a frame structure member, the distance between the fulcrums of the beam member, that is, the distance between the column members over which the beam member is bridged can be increased, and the earthquake resistance It becomes possible to form a large space in the building while improving.

  In addition, the bottom plate and the side plate constituting the beam member of the present invention are not special members, and no special technique is required for forming the beam member. A space can be formed.

  Furthermore, when the beam member according to the present invention is provided with the deflection correcting means, when the beam member is bent due to aging, the wire is tensioned by the tension means, thereby easily correcting the deflection of the beam member. be able to.

  Hereinafter, embodiments of a beam member of the present invention will be described with reference to the drawings. The beam member 10 according to the present embodiment shown in FIG. 1 and FIG. 2 is a beam member that is laid across a pair of beam members 12 and 12 in a frame structure of a wooden building. 2A is an end view of the beam member 10, and FIG. 2B is a longitudinal sectional view. The beam member 10 is erected on the long bottom plate 14 and on both side edges 16 and 16 on the upper surface 15 side of the bottom plate 14 along the longitudinal direction (X direction in the drawing) of the bottom plate 14. The side plate members 18 and 18 are included, and a space 20 is formed between the side plate members 18 and 18.

  Here, the method of joining the bottom plate member 14 and the side plate members 18 and 18 is not particularly limited, but for example, as shown in FIG. 2B, on both side edges 16 and 16 on the upper surface 15 side of the bottom plate member 14, A plurality of insertion holes 22 are formed at predetermined intervals along the longitudinal direction (X direction in FIG. 1) of the bottom plate member 14, and pipe pins 24 are erected in the insertion holes 22. On the other hand, an insertion hole 22 is formed in advance on the lower surface 18 a side of the side plate material 18, that is, the surface side facing the upper surface 15 of the bottom plate material 14, and a pipe pin 24 erected on the bottom plate material 14 in this insertion hole 22. Insert. Since a through hole 30 for inserting the drift pin 28 is formed in the side wall 26 of the pipe pin 24 in a direction orthogonal to the longitudinal direction of the pipe pin 24, the bottom plate member 14 and the side plate member 18 are formed in the through hole 30. The bottom plate member 14 and the side plate members 18 and 18 can be joined by inserting the drift pin 28 from the side surface of the plate.

  In addition, this invention relates to the beam member in the frame structure member for constructing | assembling a wooden building, Comprising: The joining method of the beam member 10 of this embodiment, the column member 11, and the girder member 12 is also specifically limited. Any known joining method can be applied. As an example of the joining method, as shown in FIGS. 3 (a) and 3 (b), a joint metal having a U-shaped cross section is formed on an inner surface 12a of a girder member 12 joined to a column member 11 having a T-shaped cross section. 32 is fixed with a bolt 33a and a nut 33b. As shown in FIG. 3B, the column member 11 is a column member having a T-shaped cross section formed by joining a column member 11a having a substantially square cross section and a column member 11b having a rectangular cross section. The upper end surface of the column member 11b constituting the column member 11 is set lower than the upper end surface of the column member 11a to which the beam member 12 is joined by the thickness t of the bottom plate member 14 in the beam member 10 (FIG. 3 ( a)).

  On the other hand, on the end face 18b side of the side plate member 18 in the beam member 10, a concave groove 36 into which two flat plate portions 34 provided in the joint hardware 32 can be inserted is formed. As shown in FIGS. 1 and 4, the column member 11 is inserted into the concave groove 36 by inserting the flat plate portion 34 included in the metal joint 32 and inserting the drift pin 28 from the side surface of the side plate 18. In the state where the bottom plate member 14 is placed on the upper end surface of the column member 11b having a rectangular cross section, the side plate members 18 and 18 are joined to the girder member 12. Further, the bottom plate member 14 and the pillar member 11b placed on the upper end surface of the pillar member 11b are joined by the joining plate 38 and the drift pin 28. As a result, the beam member 10 of the present embodiment, the pillar member 11 and The girder member 12 is joined. According to such a joining method, the beam member 10, the column member 11 and the girder member 12 can be joined easily and inexpensively, and a frame structure excellent in earthquake resistance can be obtained.

  According to the beam member 10 of the present embodiment, the bottom plate member 14 and the side plate members 18 and 18 are joined together with the space portion 20 formed between the side plate members 18 and 18. An increase in the weight of the beam member 10 can be suppressed while expanding. Therefore, when the beam member 10 is applied to a wooden building as a frame structure member, the distance between the fulcrums of the beam member 10, that is, the distance between the column members 11 and 11 on which the beam member 10 is bridged can be increased. It is possible to form a large space in the building while improving earthquake resistance.

  Moreover, it is not necessary to use any special materials for the bottom plate material 14 and the side plate material 18 constituting the beam member 10 and various joining members, and no special technique is required for forming the beam member 10. Therefore, a large space can be formed easily and inexpensively in the building.

  5 and 6 show another embodiment of the present invention. The beam member 10 a shown in the plan view of FIG. 5A and the longitudinal sectional view of FIG. 5B is horizontally mounted between the pair of beam members 12, 12 like the beam member 10 of the above embodiment. It is a beam member, and is erected on both side edges 16 and 16 on the upper surface 15 side of the bottom plate member 14 along the long bottom plate member 14 and the longitudinal direction (X direction in the drawing) of the bottom plate member 14. The side plate members 18 and 18 are included, and a space 20 is formed between the side plate members 18 and 18.

  Furthermore, the beam member 10a of the present embodiment is characterized by including means for correcting the bending of the beam member 10a (= deflection correcting means). Specifically, the deflection correcting means includes two fixed pulleys 40 disposed in the space 20 of the beam member 10a, and the fixed pulley 40. The wire 42 is provided, and tensioning means 44 for tensioning the wire 42 is included. The number of the fixed pulleys 40 is not particularly limited, and it is sufficient that at least one or more fixed pulleys are provided. However, in a normal frame structure, since a small beam is joined to the longitudinal center of the beam member 10a in a direction perpendicular to the longitudinal direction, FIG. The arrangement of the fixed pulley 40 shown is preferred.

  FIG. 6 is an enlarged plan view of a main part of the beam member 10a shown in FIG. 5 and illustrates an example of a method for attaching the fixed pulley 40 and the like. It is not limited to this, and it is possible to attach by other attachment methods. According to the method illustrated in FIG. 6, the fixed pulley 40 is disposed in the space portion 20 in a state in which the rotation shaft 40 a passes through the side plate members 18 and 18. Reference numeral 50 indicates a metal reinforcing plate having a through-hole through which the rotating shaft 40a can be inserted, and is mounted on the inner side surface and the outer side surface of the side plate member 18, respectively. Reference numeral 52 denotes a steel pipe inserted into a through hole for inserting the rotary shaft 40a through the side plate member 18, and the side plate member 18 is reinforced at the place where the fixed pulley 40 is disposed. .

  Further, the wire 42 is stretched between the beam members 12 and 12 with both ends thereof penetrating the beam members 12 and 12, respectively. And the tension | tensile_strength means 44 for tensioning the wire 42 is attached to the one end 42a of the wire 42 which penetrated one girder member 12, and the other end 42b of the wire 42 which penetrated the other girder member 12 is The outer surface 12 b of the girder member 12 is fixed by the fixing means 46. The girder member 12 into which the one end 42a and the other end 42b of the wire 42 are inserted is provided with the reinforcing plate 50 and the steel pipe 52 as in the case where the fixed pulley 40 is disposed, and the insertion portion of the wire 42 is inserted. The girder member 12 is reinforced. The tensioning means 44 is not particularly limited, and any known wire tensioning device (jack or the like) can be used, and the fastening means 46 is not limited as long as the other end 42b of the wire 42 can be fastened.

  According to the beam member 10a of this embodiment provided with the bending correction means having the above-described configuration, when the beam member 10a is bent, it is possible to easily correct the bending. Since the beam member 10a of the present embodiment can suppress the increase in the own weight of the beam member 10a while expanding the cross-sectional area of the beam member 10a in the same manner as the beam member 10 of the above embodiment, the beam member 10a is used as a frame structure member. When applied to a wooden building, the distance between the fulcrums of the beam member 10a, that is, the distance between the column members 11 and 11 in FIG. 5B can be increased, and the earthquake resistance is improved in the building. A large space can be formed. Further, as the distance between the fulcrums of the beam member 10a increases, when the bending due to secular change, that is, the bending in the direction of arrow A in FIG. By tensioning, the beam member 10a can be lifted in the direction of arrow B via the fixed pulley 40 to which the wire 42 is engaged, and the deflection can be corrected.

  The beam members 10 and 10a according to the embodiments of the present invention exemplified above should not be construed as substantially limiting the technical idea of the present invention. For example, the column member 11 to which the beam member 10 and the like are joined is not limited to a T-shaped cross section, and may be a prism.

  Further, the deflection correction means provided in the beam member 10a of the above embodiment is not limited to the above embodiment. For example, the tension means 44 attached to one end 42a of the wire 42 without both ends of the wire 42 penetrating the girder member 12 may be attached to the inner surface 12a of the one girder member 12, and the other end 42b of the wire 42 may be attached. However, it may be fixed to the inner side surface 12a of the other beam member 12. Alternatively, the wire 42 penetrating the one girder member 12 may be extended downward (direction A in FIG. 5 (b)) along the column member 11, and the tension means 44 may be attached to one end 42a thereof. .

  Furthermore, solid or laminated wood may be applied to the bottom plate and side plate in the beam member of the present invention, but redwood is particularly preferred for the bottom plate, and a thin single plate is laminated on the side plate. A bonded single plate laminate (LVL = Laminated Veneer Number) is preferred. The present invention can be carried out without departing from the gist thereof, with appropriate improvements, changes or additions based on the inventive ideas and ideas of those skilled in the art.

It is a perspective view of the beam member concerning one embodiment of the present invention. (A) is an end view of the beam member shown in FIG. 1, and (b) is a longitudinal sectional view. (A) is the partially expanded side view which showed the state before joining with the beam member shown in FIG. 1, and a pillar member and a girder member, (b) is a partially expanded plan view. It is the partially expanded side view which showed the state after joining with the beam member shown in FIG. 1, and a pillar member and a girder member. (A) is a top view of the beam member concerning other embodiments of the present invention, and (b) is a longitudinal section. It is a principal part enlarged plan view of the beam member shown in FIG.

Explanation of symbols

10, 10a: Beam member 11: Column member 12: Girder member 14: Bottom plate material 15: Upper surface 16: Side edge portion 18: Side plate material 20: Space portion 40: Fixed pulley 42: Wire 44: Tensioning means

Claims (2)

A pair of column members, a pair of girder members joined one by one to the upper end surface of each column member, and a beam member horizontally placed between the pair of girder members,
The beam members are respectively erected on both side edge portions on the upper surface side of the bottom plate material along the longitudinal direction of the bottom plate material and a long bottom plate material joined to each upper end surface of the pair of column members. A pair of side plates joined together, and a space is formed between the pair of side plates,
Inserting and joining the joint hardware fixed to the inner surface of the girder member into the concave groove provided on the end surface of the side plate member,
At least one fixed pulley disposed in the space portion with a rotating shaft penetrating the pair of side plates, and a wire that is attached to a lower portion of the fixed pulley and is stretched between the girder members And a bending correction means configured to include a tension means for tensioning the wire,
A shaft structure characterized by that . The frame structure according to claim 1, wherein the deflection correcting unit can correct slack by lifting the beam member .

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