JP5185778B2 - Frame structure in wooden building - Google Patents

Description

  The present invention relates to a frame structure in a wooden building using square members obtained from small-diameter wood for columns and beams.

  In recent years, it has become very difficult to use large-diameter trees in order to obtain columns and beams having a large cross-sectional area in a frame structure in a wooden building for reasons such as reduction of large-diameter trees. For this reason, a plurality of square or plate materials obtained from small-diameter wood are assembled and fixed with an adhesive or a joining member (for example, steel material) to form a laminated material having a large cross-sectional area. It is widely used for beams (for example, Patent Documents 1 and 2).

JP 2007-268731 A JP 2005-35262 A

  However, in order to obtain a frame structure in a stable quality wooden building, such a glulam must ensure a substantially uniform bond strength throughout, so that the adhesive is not uneven. It is necessary to apply them to each other and to arrange the joining members at regular intervals, which is not always an easy operation. Moreover, when an adhesive is used, it may be unpreferable on sanitary environment, and when joining members, such as steel materials, are used, it is unpreferable on an aesthetics in many cases.

  The present invention has been made in view of the above reasons, and its purpose is not to use laminated wood but to form square pillars and square beams using square wood obtained from small-diameter wood. The object is to provide a frame structure in a wooden building having strength.

  In order to achieve the above object, the frame structure in the wooden building according to claim 1 is a quadrangular cross section and extends in a rod shape, and each side constituting the quadrangle becomes first to fourth vertical surfaces, A notch in which an adjacent portion of each vertical surface is cut out over a predetermined length is provided, and the first and third vertical surfaces at the first vertical position and the second and fourth vertical surfaces at the first vertical position. In addition, there are horizontal grooves formed between the two cutouts on the second and fourth vertical surfaces at the third vertical position and on the first and third vertical surfaces at the fourth vertical position, respectively. The formed square column and two beam members with a line-symmetric shape extending in the shape of a rod with a quadrangular cross section are combined, and both beam members are vertical surfaces in which each side constituting the quadrilateral is opposed to each other. A fitting recess formed by cutting in a step shape on one vertical surface. Two fastening plate insertion holes that pass between the opposing vertical surfaces on both sides of the fitting recess and communicate with the fitting recess, and a horizontal plane that opposes the plane overlapping the two fastening plate insertion holes The first to fourth composite beams having two square bar insertion holes penetrating between them, and two square bar insertion holes penetrating between the opposing horizontal planes, are inserted into the fastening plate insertion holes. A plurality of fastening plate members, and a plurality of square bar members that are inserted into the both-corner bar insertion holes of the beam member and the fastening plate member, and the first to fourth composite beams are respectively fitted to both beam members in order. By fitting the recesses between the outer walls of the pillars, both beam members come into contact with each other, each fastening plate material passes through the fastening plate insertion hole of both beam members and the horizontal groove of the column, and each square bar member It is fixed to the column by inserting the square bar insertion hole of the beam material and the square bar insertion hole of the fastening plate material.

  According to the frame structure of the wooden building of the present invention, sufficient strength can be obtained even if a square column or a square beam is formed by using a square bar obtained from a small-diameter wood for the column or beam without using laminated wood. Therefore, a stable quality wooden building can be obtained.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the vicinity of a joint portion of a shaft group constituting a frame structure (hereinafter abbreviated as a frame structure) 1 in a wooden building according to an embodiment of the present invention, as viewed obliquely from the upper left. In the figure, the direction indicated by arrow F is the front view direction. In this frame structure 1, as shown in the figure, a rectangular column 2 extending in the vertical direction is contacted with a first composite beam 31 and a first composite beam 31, and a second composite positioned in a direction orthogonal thereto. A third composite beam 33 in contact with the beam 32, the second composite beam 32 and orthogonal thereto, and a fourth composite beam 34 in contact with the third composite beam 33 and orthogonal to it; It is fixed in order from the top. Accordingly, the first composite beam 31 and the third composite beam 33 are parallel, and the second composite beam 32 and the fourth composite beam 34 are also parallel. For fixing the first to fourth composite beams 31, 32, 33, 34 and the column 2, as will be described in detail later, fastening plate materials 4, 4,... And square bar materials 5, 5,. Is used. In FIG. 1, the vertical surface facing the front of the pillar 2 is the first vertical surface 21, and then counterclockwise, the second vertical surface 22, the third vertical surface 23, and the fourth vertical surface 24. It has become. Further, in FIG. 1 (the same applies to FIGS. 2, 3 and 7 described later), the column 2 and the first to fourth composite beams 31, 32, 33 and 34 are not shown in the axial structure 1. It extends to a reasonable place.

  FIG. 2 shows the shape of the pillar 2, where (a) is a left side view showing the fourth vertical surface 24, and (b) is a front view showing the first vertical surface 21. Since the right side view showing the second vertical surface 22 is the same as the left side view, and the rear view showing the third vertical surface 23 is the same as the front view, these illustrations are omitted. The column 2 has a quadrangular cross section and extends in a rod shape, and each side constituting the quadrangle becomes the first to fourth vertical surfaces 21, 22, 23, and 24, and an adjacent portion in the middle portion of each vertical surface is predetermined. Cutouts 60, 60,... Cut out over the length are provided. The predetermined length of these four notches 60, 60,... Is the sum of the vertical lengths of the first to fourth composite beams 31, 32, 33, 34. Further, among these four notches 60, 60,..., Horizontal grooves 61, 61,. Specifically, at the first vertical position V1, the second vertical surface 22, 24 is at the second vertical position 22, and at the second vertical position V2, the first vertical surface 21, 23 is at the third vertical position. Horizontal grooves 61, 61,... Are engraved on the second and fourth vertical surfaces 22, 24 at V3, and the first and third vertical surfaces 21, 23 at the fourth vertical position V4, respectively. Yes.

  Since the structures of the first to fourth composite beams 31, 32, 33, and 34 are all the same, the first composite beam 31 will be described below. The first composite beam 31 is a combination of two beam members 31A and 31B having a quadrangular cross section and extending in a rod shape and having line symmetry. FIG. 3A is a plan view cross-sectional view of the first composite beam 31 cut along a plane indicated by XX in FIG.

  3B is a plan view of the beam member 31A, FIG. 3C is a front view, and FIG. 3C is a rear view. The bottom view is omitted because it is symmetrical with the plan view. In the beam member 31A, the sides constituting the quadrangle are the vertical surfaces 311 and 313 and the horizontal surfaces 312 and 314 that face each other, and a fitting recess 31a that is cut into a step shape is formed on one vertical surface 311. . The fitting recess 31a is formed in a step shape by the opening-side portion 31aa and the bottom-side portion 31ab, and in a state where the line-symmetrical beam material 31B is coupled, the notches 60, 60, It corresponds to the cross-sectional shape of the place where. Further, the beam member 31A has two fastening plate insertion holes 31b and 31b that pass through between the opposing vertical surfaces 311 and 313 on both sides of the fitting recess 31a and communicate with the fitting recess 31a. Is formed. Further, two rectangular rod insertion holes 31c and 31c are formed in the beam member 31A so as to penetrate between the horizontal planes 312 and 314 which are opposed to each other in a range overlapping the both fastening plate insertion holes 31b and 31b. In addition, since the shape of the beam material 31B is a line symmetrical shape with the beam material 31A, the description is abbreviate | omitted.

  4A and 4B are a plan view and a front view of the fastening plate material 4, respectively. The fastening plate member 4 is provided with two rectangular bar insertion holes 4c and 4c penetrating between the opposing horizontal surfaces 42 and 44. The fastening plate material 4 is inserted into the both fastening plate insertion holes 31b and 31b. In this case, the square bar insertion holes 4c and 4c overlap with the square bar insertion holes 31c and 31c of the beam members 31A and 31B in a planar position.

  Since the first to fourth composite beams 31, 32, 33, 34 and the column 2 are all fixed in the same structure, the first composite beam 31 and the column 2 will be described below. First, the fitting recesses 31a and 31a of the beam members 31A and 31B constituting the first composite beam 31 are fitted into the outer periphery of the column 2 so that both the beam members 31A and 31B are in contact with each other. In this case, the fastening plate insertion holes 31b and 31b of the beam members 31A and 31B and the horizontal groove 61 of the column 2 form a series of through holes through which the fastening plate material 4 can be inserted, and two of them are formed. The fastening plate members 4 and 4 are inserted through these two through holes, respectively. In that state, the square bar insertion holes 31c, 31c,... Of the beam members 31A, 31B are respectively through holes that are continuous with the square bar insertion holes 4c, 4c,. Are formed, and square bar members 5, 5, ... are inserted through them. The square bar members 5, 5,... May be inserted through all of the first to fourth composite beams 31, 32, 33, 3 or may be divided into two or combined. It may be divided for each beam.

  The results of experiments on the strength of such a frame structure are shown below. FIG. 5 is a front view showing the test body 7 of the experimental shaft group. In the test body 7, the second composite beam 32 and the fourth composite beam 34 are passed to the upper part between the two pillars 2, 2 ', the base 7A at the lower end in contact with the test machine, and the foot 7B slightly above it. Has been passed. Similarly to the above, in addition to the second and fourth composite beams 32 and 34, short first and third composite beams 31 and 33 are fixed to the column 2 in a direction perpendicular to them. In addition to the second and fourth composite beams 32, 34, short first and third composite beams 31 ′, 33 ′ are fixed to the column 2 ′ in the direction perpendicular to them. The composite beams 31, 31 ′, 32, 33, 33 ′, 34 and the foot clamp 7 </ b> B are each configured by combining two beam members as described above. The beam members and the columns 2 and 2 'were all 120 mm square members, and the test body 7 was 1820 mm wide and 2730 mm high.

  In the experiment, a positive and negative load is repeatedly applied in the length direction to the second composite beam 32 using a static force tester (Miyanomiya Dynamic Servo SLT-10S). Then, as shown in FIG. 5, the upper portions of the two columns 2 and 2 ′ are swung, and at the joints between the columns 2 and 2 ′ and the composite beams 31, 31 ′, 32, 33, 33 ′ and 34. Takes great stress.

  FIG. 6 is a graph showing the restoring force characteristics of the experimental results. The vertical axis represents the load (kN), and the horizontal axis represents the deformation angle (rad) from the vertical direction of the columns 2, 2 ′. Loads are in order of deformation angles ± 1/200 rad, ± 1/150 rad, ± 1/120 rad, ± 1/100 rad, ± 1/75 rad, ± 1/50 rad, ± 1/30 rad, ± 1/20 rad, ± 1 / 15 rad until added. From FIG. 6, the test body 7 shows a restoring force in which the proof stress increases as the deformation progresses, and has a sufficient strength. This is a structure in which the two beams constituting each of the composite beams 31, 31 ′, 32, 33, 33 ′, 34 and the footrest 7B sandwich the pillars 2 and 2 ′ from both sides, so that there is no cross-sectional defect. It is considered that a small contact and a wide contact surface contribute particularly.

  In this way, the frame structure 1 in this wooden building is not made of laminated lumber, but square bars or square beams can be formed using square bars with a small cross-sectional area, that is, square bars obtained from small-diameter trees. Since it has sufficient strength, a stable quality wooden building can be obtained.

  As mentioned above, although the frame structure in the wooden building which concerns on embodiment of this invention was demonstrated, this invention is not restricted to what was described in embodiment, Various within the range of the matter described in the claim Simple design changes and additions are possible. For example, when the distance between the pillar 2 and the other pillars becomes long, the first and third composite beams 31 and 33 (or the second and fourth composite beams 32 and 34) are positioned in the middle of the distance. By providing a short columnar body 8 as shown in FIG. 7 joined in the same manner as described above, the strength of the wooden building 1 can be further increased.

It is a perspective view which shows the junction part vicinity of the frame structure in the wooden building which concerns on embodiment of this invention. It is the left view and front view which show the shape of a pillar same as the above. (A) is a top view sectional view of the first composite beam same as above, (b), (c), (d) are a plan view, a front view, and a rear view of one beam material constituting it. . It is the top view and front view which show the fastening plate material same as the above. It is a front view which shows the test body of the experimental frame. It is a graph which shows the restoring force characteristic which is a result of an experiment same as the above. It is a perspective view of the structure which can be added to the frame structure in the wooden building which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wooden building 2 Column 21 1st vertical surface 22 2nd vertical surface 23 3rd vertical surface 24 4th vertical surface 31 1st composite beam 31A 1 beam material 31B which comprises 1st composite beam Another beam member constituting one composite beam 31a Fitting recess 31b of the first composite beam 31b Fastening plate insertion hole 31c of the first composite beam 31c Square bar insertion hole 32 of the first composite beam 32 Second composite Beam 33 Third composite beam 34 Fourth composite beam 4 Fastening plate material 4c Square bar insertion hole of fastening plate material 5 Square bar 60 Notch 61 Horizontal groove V1 First vertical position V2 Second vertical position V3 Third vertical Position V4 Fourth vertical position

Claims (1)

Each of the sides forming the quadrangle is a first to fourth vertical surface, and a notch is formed by cutting an adjacent portion of each vertical surface over a predetermined length. The second vertical position at the vertical position, the first vertical plane at the second vertical position, the second vertical plane at the third vertical position, the fourth vertical plane A rectangular column having a horizontal groove formed between two notches on each of the first and third vertical surfaces at a position;
Two beam members of a line-symmetric shape extending in a rod shape with a quadrangular cross section are joined, and both beam members have a vertical plane and a horizontal plane facing each other, and each side constituting the quadrangle is one vertical plane The fitting recess formed by cutting into a step shape, two fastening plate insertion holes that pass through between the opposing vertical surfaces on both sides of the fitting recess and communicated with the fitting recess, First to fourth composite beams having two square bar insertion holes penetrating between the horizontal planes facing each other in a range overlapping with the fastening plate insertion holes;
A plurality of fastening plate members having two square rod insertion holes penetrating between opposing horizontal planes, and being inserted into the fastening plate insertion holes;
A plurality of square bar members that are inserted into the double-bar insertion holes of the beam material and the fastening plate material,
In the first to fourth composite beams, both beam members come into contact with each other by fitting recesses of both beam members sandwiching the outer wall of the column, and each fastening plate member is made up of both beam members. The fastening plate insertion hole and the horizontal groove of the column are inserted, and each square bar member is fixed to the column by inserting the square rod insertion hole of the beam material and the square bar insertion hole of the fastening plate member. Frame structure in a wooden building.

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