JP2015175119A - Column-beam joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the span of a wooden beam large.SOLUTION: A load bearing part of a projecting beam 30A is loaded on a load bearing part 52 of a head 20BC of a downside column 20B constituting a wooden column 20, and rigidly joined by a column-beam joint member. Additionally, an intermediate beam 30B is pin-joined to the projecting beam 30A by a beam joint member 200. Thus, a wooden beam 30 is turned into a Gerber's beam to suppress deflection, and the span of the wooden beam 30 can become large.

Description

  The present invention relates to a column beam connection structure.

  Patent Document 1 discloses a joint structure in which an end member positioned at an end of a laminated timber beam is passed through a laminated timber column and rigidly joined. In this prior art, the laminated lumber pillar is divided into upper and lower sides with the end member interposed therebetween, and cuts into which the end member is fitted are axially provided in two directions from the mutually facing surfaces. Further, the end member is sandwiched between the two laminated timber columns from above and below, penetrates in the beam forming direction, and is bolted to the two laminated timber columns by fastening bolts inserted in the axial direction between the two laminated timber columns (Patent Document). 1).

  In Patent Document 2, one end surface of a wooden gusset beam is brought into contact with a side surface of a wooden column, and a rising portion of an L-shaped steel joint plate is applied to the other end surface of the gusset beam, and the rising portion, the gusset beam, the wooden column Discloses a rigid joint structure of wooden pillar beams that are bolted through nuts. In this prior art, the end of the horizontal beam is mounted on the horizontal portion of the joining plate and screwed, and the steel plate is applied to the horizontal beam end and the gusset beam to fix the screw (Patent Literature). 2).

  Here, when the span of the wooden beam is increased, the deflection becomes large and the beam cross section needs to be enlarged. In addition, it is difficult to produce a large-span wooden beam such as a laminated lumber beam because of manufacturing equipment and manufacturing facilities.

JP-A-6-185115 JP-A-2-030402

  In view of the above fact, the present invention has a problem of increasing the span of a wooden beam.

  According to the first aspect of the present invention, there is provided a wooden column provided with a coating layer around a column-side load support portion that supports a load, and a coating layer provided around a beam-side load support portion that supports a load. The beam-side load support portion is placed on and joined to the column-side load support portion of the head of the head, and a covering layer is provided around the first wooden beam extending on both sides and the beam-side load support portion supporting the load. A second wood beam disposed adjacent to the first wood beam, and a joining means for joining the beam side load support portions of the first wood beam and the second wood beam.

  In the first aspect of the present invention, the first wooden beam becomes a spring beam by the beam-side load support portion being placed on and joined to the head of the column-side load support portion of the wooden column. Therefore, compared with the structure in which the wooden beam is pin-joined to the side surface of the wooden column, the bending of the first wooden beam can be suppressed, so that the span can be increased.

  Further, the second wooden beam is joined to the first wooden beam, which is a jumping beam, so that the span is increased.

  Further, by joining the ends of the first wooden beam, which is a protruding beam, to both ends of the second wooden beam, a gel bar beam is formed, and bending can be suppressed, so that the span can be further increased.

  According to a second aspect of the present invention, the joining means is disposed with a beam width direction as a plate thickness direction, and is attached to a vertical slit formed at an end portion of the first wooden beam and the second wooden beam. A joining plate that joins the load supporting portions together, and a beam forming direction is provided at the upper end of the joining plate with the beam forming direction being a plate thickness direction, and the beam-side load support of at least one of the first wooden beam and the second wooden beam And an upper plate whose plate surface is in contact with the upper end of the unit.

  In the invention according to claim 2, the upper plate bears a part of the vertical load applied to the joining plate. Therefore, the joint strength between the first wooden beam and the second wooden beam is improved. Further, the joining of the joining plate to the beam side load support portion can be simplified.

  According to the present invention, it is possible to increase the span of a wooden beam.

It is an elevation view which shows typically the column beam frame of the wooden building of one embodiment of the present invention. It is a disassembled perspective view which shows the junction part of a wooden pillar and a jumping beam. It is a longitudinal cross-sectional view along the beam direction which shows the junction part of a wooden pillar and a jumping beam. It is a disassembled perspective view which shows the junction part of a jump beam and an intermediate beam. It is a longitudinal cross-sectional view along the beam direction which shows the junction part of a jump beam and an intermediate beam. (A) which shows a beam joining member is a perspective view, (B) is a side view. (A) is a perspective view shown in the partial cross section which shows the laminated material which comprises a wooden pillar, (B) is a perspective view shown in the partial cross section which shows the laminated material which comprises a wooden beam.

  A column beam frame of a wooden building to which the column beam joint structure of the present invention is applied will be described. In the following description, “rigid joint” and “pin joint” refer to a joint structure in structural calculation.

  As shown in FIG. 1, the wooden building 10 has a column beam frame 12 composed of a wooden column 20 and a wooden beam 30, and a slab 14 is supported on the wooden beam 30 (FIGS. 3 and 7). (See also (B)).

  The wooden column 20 is divided into an upper column 20A and a lower column 20B, and a wooden beam 30 is passed between the upper column 20A and the lower column 20B. The wooden beam 30 is disposed between the jump beam (splash) 30A placed on the lower column 20B and rigidly joined to the lower column 20B, and the end 30AD of the left and right jump beams 30A. And an intermediate beam 30B in which both end portions 30BD are pin-joined to the end portion 30AD. Therefore, the wooden beam 30 constituting the column beam frame 12 is a Gerber beam.

  The wooden pillar 20 and the wooden beam 30 are composed of fireproof laminated materials 50 and 51 shown in FIG.

[Fireproof laminated timber]
Next, the fireproof laminated materials 50 and 51 constituting the wooden pillar 20 and the wooden beam 30 will be described with reference to FIG.

  As shown in FIG. 7, the fireproof laminated members 50, 51 have a load support portion (core material portion) 52 that supports a load, and a fireproof coating layer 70 provided around the load support portion 52. . The refractory coating layer 70 includes a fuel stop layer 54 in which a mortar bar 60 is embedded and a fuel surcharge layer 56.

  The load support portion 52 is provided at the center of the fireproof laminated material 50, 51, the flame stop layer 54 is provided outside the load support portion 52 so as to surround the load support portion 52, and the fuel allowance layer 56 is the fuel stop layer 54. Is provided so as to surround the flame stop layer 54.

  In addition, the fireproof laminated material 51 used for the wooden beam 30 is the wooden pillar 20 except that the fireproof covering layer 70 composed of the fuel allowance layer 56 and the fuel stop layer 54 is not provided on the upper side supporting the slab 14. It is the structure similar to the fireproof laminated material 50 used for (refer FIG.7 (B)).

  And, in such a fireproof laminated material 50, 51 having such a three-layer structure, in the event of a fire, the outer fuel allowance layer 56 burns and carbonizes to become a carbonized layer, thereby exhibiting a heat insulating effect and also providing a flame stop layer 54. The constituting mortar bar 60 stops the combustion while absorbing heat, so that the load support portion 52 that supports the load at the center portion is protected from fire.

(Production method and material of fireproof laminated wood)
Although the manufacturing method and material of the fireproof laminated materials 50 and 51 are not limited, an example is demonstrated below.

  The load supporting portion 52 is laminated and pressed with a core material 72 made of wood (an operation in which pressure is applied to an adherend to which an adhesive is applied and the adhesive is sufficiently hardened to complete the bonding). . Then, a fuel surrogate material 74 made of wood is laminated on the fuel support layer 54 and the fuel surrogate layer 56 around the load support portion 52 together with the fuel stop layer 54 (mortar bar 60).

  The core material 72 and the fuel surrogate material 74 of the fireproof laminated materials 50 and 51 may be made of wood. For example, the core material 72 and the fuel surrogate material 74 are made of wood (hereinafter referred to as “general wood”) used for general wooden construction such as rice pine, Karamatsu, firewood, cedar, and Asunaro.

  Moreover, the flame stop layer 54 should just be a layer which can suppress a flame and heat approach and can exhibit a flame stop effect. For example, the flame stop layer 54 may be a layer having flame retardancy or a layer capable of absorbing heat.

  Examples of the flame retardant layer include a flame retardant chemical injection layer obtained by injecting a flame retardant chemical into wood and making it incombustible. In addition, the heat-absorbable layer has a material with a larger heat capacity than ordinary wood, a material with higher thermal insulation than ordinary wood, a material with higher thermal inertia than ordinary wood, and a combination of these materials and ordinary wood. Materials and the like. Furthermore, you may form a flame stop layer combining the layer which has a flame retardance, and the layer which can absorb heat.

  Examples of the material having a larger heat capacity than the above-mentioned general wood include mortar, stone, glass, fiber reinforced cement, inorganic materials such as gypsum, and various metal materials. Examples of the material having higher heat insulation than general wood include calcium silicate board, rock wool, and glass wool. Examples of the material having higher thermal inertia than general wood include wood such as Selangan Batu, Jara, and Bongoshi.

  In the drawings other than FIG. 7, the core material 72, the fuel surrogate material 74, the fuel stop layer 54, and the fuel surrogate layer 56 are omitted and simplified in order to avoid complication.

[Join the column and the jumping beam]
Next, the joining of the wooden pillar 20 and the jumping beam 30A will be described with reference to FIGS.

  As shown in FIGS. 2 and 3, the beam-column joining member 100 that joins the wooden column 20 and the protruding beam 30 </ b> A includes a rectangular bottom plate 110 and a cylindrical tube portion provided at the center of the bottom plate 110. 120. A mounting hole 112 (see FIG. 2) penetrating in the thickness direction is formed at a corner of the bottom plate 110. Further, the cylindrical portion 120 is formed with joining holes 122A and 122B penetrating in the beam width direction (radial direction).

  The load support portion 52 of the head portion 20BC of the lower column 20B is formed with a concave seat carved portion 130 to which the bottom plate plate 110 of the column beam joining member 100 is fixed. Further, the fireproof coating layer 70 (the fuel allowance layer 56 and the fuel stop layer 54) is cut out at a portion where the head 20BC of the lower column 20B is connected to the lower portion of the jump beam 30A, and the load support portion 52 is exposed. doing. The notched portion is referred to as a notch portion 132.

  A beam side insertion hole 134 that penetrates in the vertical direction and into which the cylindrical portion 120 of the column beam joining member 100 is inserted is drilled in the load support portion 52 of the jump beam 30A. Further, a column side insertion hole 138 into which the distal end portion 120A of the cylindrical portion 120 of the column beam joining member 100 is inserted is drilled in the load support portion 52 of the lower end portion 20AC of the upper column 20A.

  Further, as shown in FIG. 2, a beam side joint hole 136 penetrating in the beam width direction is drilled in the jumping beam 30A at a position corresponding to the through hole 122B (see also FIG. 3) of the cylindrical portion 120. Yes. Further, the columnar joint hole 137 penetrating in the column width direction is also drilled in the upper column 20A at a position corresponding to the through hole 122B (see also FIG. 3) of the cylindrical portion 120.

(Join method of jump beam and column)
Next, an example of a method of joining the jump beam 30A and the wooden pillar 20 will be described.

  As shown in FIGS. 2 and 3, the bottom plate plate 110 of the beam-column joining member 100 is fitted into the carved portion 130 of the head 20BC of the lower column 20B, and the lag screw 102 (see FIG. 3) is inserted into the mounting hole 112. The bottom plate plate 110 is fixed to the chamfered portion 130 by being inserted.

  The cylindrical portion 120 of the column beam joining member 100 joined to the head portion 20BC of the lower column 20B is inserted into the beam side insertion hole 134 of the load support portion 52 of the jump beam 30A, and the notch portion 132 of the jump beam 30A is inserted. The head 20BC of the lower column 20B is fitted. Then, the drift pin 140B is press-fitted into the beam-side joining hole 136 (see FIG. 2) and the through-hole 122B of the cylindrical portion 120, and the lower column 20B and the jumping beam 30A are joined.

  Further, after the column-side insertion hole 138 of the upper column 20A is inserted and positioned at the distal end portion 120A of the cylindrical portion 120 of the column-beam joining member 100 protruding above the jumping beam 30A, the column-side joining hole 137 (FIG. 2) is positioned. The drift pin 140A is press-fitted into the through hole 122A of the cylindrical portion 120 and the upper column 20A is joined.

  In addition, after inserting a temporary pin in the beam side joining hole 136, the column side insertion hole 138, etc., and temporarily fixing and positioning it, the temporary pin may be pulled out and the drift pins 140A and 140B of the actual installation may be press-fitted.

  The lengths of the drift pins 140A and 140B are substantially the same as the width of the load support portion 52, and are embedded so as not to cover the fireproof coating layer 70 (the fuel allowance layer 56 (see FIG. 7)). Therefore, the beam-side joining hole 136 and the column-side joining hole 137 are filled with a wood plug or the like (not shown) to close the hole.

[Join the jump beam and intermediate beam column]
Next, the joining of the jump beam 30A and the intermediate beam 30B will be described with reference to FIGS.

  As shown in FIGS. 4 to 6, the beam joining member 200 for joining the jumping beam 30A and the intermediate beam 30B includes a rectangular joining plate 210 arranged with the beam width direction (horizontal direction) as the plate thickness direction, The upper plate 220 is provided at a half of the upper end portion 210A of the joining plate 210 and is arranged with the beam forming direction (vertical direction) as the plate thickness direction. That is, when the beam joining member 200 is viewed in the beam direction, half is T-shaped and half is I-shaped. The joining plate 210 is formed with a plurality of through holes 212A and 212B penetrating in the plate thickness direction.

  As shown in FIG. 4, longitudinal slits 32 </ b> A and 32 </ b> B into which the joining plate 210 of the beam joining member 200 is inserted in the load support portions 52 of the end portion 30 </ b> AD of the jump beam 30 </ b> A and the end portion 30 </ b> BD of the intermediate beam 30 </ b> B, respectively. Is formed. Further, as shown in FIGS. 4 and 5, a concave seat carved portion 230 in which the upper plate 220 of the beam joining member 200 is received is formed at the upper end portion of the load support portion 52 of the end portion 30BD of the intermediate beam 30B. Yes.

  Further, as shown in FIG. 4, in the jump beam 30A and the intermediate beam 30B, a beam side joint hole 232A penetrating in the beam width direction at a position corresponding to the through holes 212A and 212B of the joint plate 210 of the beam joint member 200. , 232B are drilled.

(Join method of jump beam and intermediate beam)
Next, an example of a method for joining the jump beam 30A and the intermediate beam 30B will be described.

  As shown in FIG. 4, the joining plate 210 of the beam joining member 200 is inserted into the longitudinal slit 32 </ b> B of the end portion 30 </ b> BD of the intermediate beam 30 </ b> B, and the upper plate 220 is fitted into the seat carving portion 230. Then, a temporary pin (not shown) is inserted into the beam side bonding hole 232B and the through hole 212B of the bonding plate 210 to temporarily fix the beam bonding member 200.

  The joining plate 210 of the beam joining member 200 temporarily fixed to the end portion 30BD of the intermediate beam 30B is inserted from above into the vertical slit 32A of the end portion 30AD of the protruding beam 30A. Then, a temporary pin (not shown) is inserted into the beam-side joining hole 232A and the through-hole 212A of the joining plate 210 and temporarily fixed.

  After positioning the jumping beam 30A and the intermediate beam 30B, the temporary pin is pulled out and the drift pins 240A and 240B are permanently inserted to join the jumping beam 30A and the intermediate beam 30B.

  The lengths of the drift pins 240A and 204B are substantially the same as the width of the load supporting portion 52 in the beam forming direction so as not to cover the fireproof coating layer 70 (the fuel allowance layer 56 (see FIG. 7)). Buried. Therefore, the beam-side joint holes 232A and 232B are filled with a wooden plug (not shown) to close the holes.

  In the above description, the beam joining member 200 of the end portion 30BD of the intermediate beam 30B is temporarily fixed, but the present invention is not limited to this. The beam joining member 200 may be temporarily fixed to the end 30AD of the jumping beam 30A first. Alternatively, the joining plate 210 of the beam joining member 200 may be inserted into the longitudinal slits 32A and 32B in a state where the end 30BD of the intermediate beam 30B and the end 30AD of the jumping beam 30A are abutted and temporarily positioned.

<Action and effect>
Next, functions and effects of the present embodiment will be described.

  The notched portion 132 is formed by notching the fireproof covering layer 70 (the fuel allowance layer 56 and the fuel stop layer 54) below the jump beam 30A, and the load supporting portion 52 is exposed. Then, the head 20BC of the lower column 20B of the wooden column 20 is fitted in the notch 132, and the lower column is joined by the beam-to-column joining member 100 fixed to the load support portion 52 of the head 20BC of the lower column 20B. 20B and the jumping beam 30A are joined.

  That is, the load support portion 52 of the jump beam 30A is placed on the load support portion 52 of the head 20BC of the lower column 20B of the wooden column 20, and the load support portions 52 are rigidly joined to each other by the column beam joining member 100. .

  Therefore, the jumping beam 30A constituting the wooden beam 30 is a jumping beam. Therefore, compared to a configuration in which a wooden beam is pin-bonded to the side surface of the wooden column, the bending of the jumping beam 30A is suppressed, so that a large span is achieved without increasing the beam cross section (without increasing the beam formation). be able to.

  Further, by pin-bonding the intermediate beam 30B between the end portions 30AD of the left and right jumping beams 30A, the wooden beam 30 becomes a Gerber beam and the bending is suppressed, so that the wooden beam 30 can be further expanded in span.

  Further, a part of the vertical load applied to the joining plate 210 of the beam joining member 200 is borne by the upper plate 220 whose plate surface is in contact with the load support portion 52. Therefore, the joint strength between the jump beam 30A and the intermediate beam 30B is improved. Further, the number of drift pins 240A and 204B that join the joining plate 210 can be reduced as compared with the case where the upper plate 220 is not provided.

  In addition, by constructing the jumping beam 30A without the upper plate 220 in advance, it is possible to set the construction of the intermediate beam 30B on the insertion side as a drop.

  Here, as described above, the span of the wooden beam 30 can be increased by applying the present invention. Therefore, it is possible to realize a large-span wooden beam, which was difficult to realize due to the capacity of the manufacturing facility, at the current manufacturing facility without newly investing in equipment. Therefore, the freedom degree of the construction plan of a wooden building improves.

  Further, the joining of the wooden pillar 20 and the jumping beam 30A constituting the wooden beam 30 and the joining of the jumping beam 30A and the intermediate beam 30B constituting the wooden beam 30 both join the load support portions 52 to each other. . Further, the drift pins 140A, 140B, 240A, 240B are embedded and not exposed. Furthermore, the beam-side joining hole 136, the column-side joining hole 137, and the beam-side joining holes 232A, 232B are filled with a wooden plug or the like, and the holes are closed. Therefore, the wooden pillar 20 and the wooden beam 30 are also connected to the fireproof covering layer 70 (fuel) without exposing the column-beam joining member 100, the beam joining member 200, and the drift pins 140A, 140B, 240A, 240B at the joint. The cover layer 56 and the fuel stop layer 54) are covered.

  Therefore, at the joint portion, in the event of a fire, the outer fuel allowance layer 56 burns and carbonizes to become a carbonized layer, thereby exhibiting a heat insulation effect, and the mortar bar 60 constituting the fuel stop layer 54 absorbs heat. By stopping the combustion, the load support portion 52 that supports the load at the center is protected from fire.

<Others>
The present invention is not limited to the above embodiment.

  For example, the fireproof laminated materials 50 and 51 are not limited to the structure shown in FIG. For example, the timber may be fire-coated wood around the wooden load support portion, or may be wood impregnated with a chemical. More specifically, for example, a structure in which a one-layered fireproof coating layer composed of a flame retardant chemical injection layer in which a flame retardant chemical is injected into wood and incombustible treatment is provided on the outside of the load support portion. Also good. Further, instead of the laminated wood, it may be a single wood beam or wood pillar. In short, any wood pillar and wood beam provided with a coating layer around the load support portion may be used.

  Further, in the above embodiment, the column beam joining members 100 are rigidly joined to the load support portions 52 of the lower column 20B and the protruding beam 30A, but the present invention is not limited to this. You may rigidly join by joining members other than the beam-column joining member 100. FIG.

  Moreover, in the said embodiment, although the load support parts 52 of the jump beam 30A and the intermediate beam 30B were pin-joined by the beam joining member 200, it is not limited to this. You may pin-join with joining members other than the beam joining member 200. FIG.

  For example, a configuration in which the upper plate is provided in the entire upper end portion of the bonding plate may be used, or a configuration without the upper plate (configuration of only the bonding plate) may be used. Further, other than the drift pin, for example, a hook-shaped member (for example, a steel bar), a bolt, and a nut may be joined. In short, it is only necessary that the load support portions 52 of the jump beam 30A and the intermediate beam 30B are pin-joined by the beam joining member 200. Moreover, although the baseplate plate 110 of the beam-column joining member 100 is being fixed to the seat carving part 130 with the lag screw 102, it is not limited to this. It may be fixed with a screw other than the lag screw.

  Moreover, in the said embodiment, although the wooden beam 30 is a gel bar beam, it is not limited to this. It may be a continuous beam other than a gel bar beam or a simple beam. For example, the end portions 30AD of the jump beam 30AB may be joined.

  Furthermore, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

10 Wooden building 12 Pillar beam frame 20B Lower column (woody column)
30A Bounce beam (an example of the first wooden beam)
30B Intermediate beam (example of second wooden beam)
32A Vertical slit 32B Vertical slit 52 Load support (column side load support, beam side load support)
70 Fireproof coating layer (an example of a coating layer)
200 Beam joining member (an example of joining means)
210 Bonding plate 220 Upper plate

Claims (2)

A wooden column provided with a coating layer around the column-side load support portion supporting the load;
A covering layer is provided around the beam-side load support portion that supports the load, and the beam-side load support portion is placed on and joined to the column-side load support portion of the head of the wooden column, and extends to both sides. The first wooden beam,
A second wooden beam disposed adjacent to the first wooden beam, the beam of the first wooden beam and the second wooden beam provided with a covering layer around a beam side load supporting portion for supporting a load; A joining means for joining the side load support parts;
Column beam connection structure. The joining means includes
The beam width direction is arranged as the plate thickness direction, and is attached to a vertical slit formed at the end of the first wood beam and the second wood beam, and a joining plate that joins the beam side load support portions,
The upper part where the beam forming direction is provided at the upper end of the joint plate as the plate thickness direction, and the plate surface is in contact with the upper end of the beam-side load support part of at least one of the first wooden beam and the second wooden beam Plates,
The beam-column joint structure according to claim 1, comprising:

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