Compound beam and column-beam coupling structure

Abstract

According to the present invention, a plurality of beam members 11, 12 formed from wood material and having a longitudinal rectangular cross section are juxtaposed such that the surface on one side of the beam member 11 and the surface on one side of the beam member 12 are in contact with each other without any gap over the entire length of the beam members 11, 12, pin insertion holes 13 penetrating in the beam width direction are formed in a plurality of locations in each of the beam members 11, 12, and a pin member 2 is inserted into each pin insertion hole 13, whereby the plurality of beam members 11, 12 are integrally united. At the location where a column member 33 is to be erected on the upper side of a middle portion of the compound beam 1, pin members 2 are inserted into a coupling 4B provided with cylindrical or columnar beam coupling parts 41 embedded into the compound beam 1 from above and a cylindrical, columnar, or plate-like column base coupling part 42B embedded into the lower end section of the column member 33 from below, whereby the plurality of beam members 11, 12 forming the compound beam 1 and the column member 33 are integrally coupled.

Description

Laminated beam and column-beam connection structure

[0001] The present application relates to a laminated beam formed by joining multiple beams made of wooden material in the beam width direction, and a column-beam connection structure at a location where a column is connected to the upper side of the laminated beam.

[0002] In wooden buildings, in order to create large spans and large window openings, it is necessary to increase the structural strength of the beams. One way to achieve this is to use beams made of large-section laminated timber, but large-section laminated timber has low productivity and increases manufacturing costs. Furthermore, as the beam height increases, the ceiling height (dimensions under the beams) becomes more limited, which means that the floor height must be increased accordingly, which also has a significant economic disadvantage.

[0003] One well-known technique for increasing the structural strength of beams while suppressing beam formation is the "laminated beam," which joins two pieces of wooden material with a vertically long rectangular cross section in the width direction of the beam. The two beams are generally joined using screws or adhesive (see, for example, Patent Documents 1 and 2). Another well-known technique is the "composite beam," which sandwiches a steel plate or rectangular tubular reinforcing material between two pieces of wooden material and fastens them together with bolts and nuts in the width direction of the beam (see, for example, Patent Documents 3 and 4).

[0004] JP 2015-214832 A JP 05-340029 A JP 2015-098680 A JP 2013-014998 A

[0005] To join two pieces of wood that make up a laminated beam with screws, a considerable number of screws are required. The length of the screws is about 2 / 3 to 3 / 4 of the width of the laminated beam, so the screws are prone to bending or breaking when they hit knots in the wood. In addition, screws have poor long-term reliability in terms of joint strength.

[0006] The method of joining two pieces of wood that make up a laminated beam with adhesive is time-consuming and labor-intensive, resulting in poor productivity and high processing costs, making it unsuitable for mass production. Furthermore, there are concerns about the reliability of adhesive strength over the long term, which makes it difficult to obtain official certification.

[0007] The ends or middle of a laminated beam are often pre-cut to join it to other beams or columns, but the pre-cutting machines at typical wood processing plants can only accommodate lumber up to 150 mm thick. Therefore, the two pieces of wood that make up the laminated beam must be pre-cut before they can be joined, but with these two joining methods, it is difficult to achieve precision after joining.

[0008] Furthermore, when two pieces of wood that make up a beam are fastened together with bolts and nuts, a clearance is created between the bolt and the through-hole formed in the wood, which reduces the initial rigidity against the load. As a result, the two pieces of wood cannot be considered as a single unit structurally, and the cross-sectional efficiency in structural design deteriorates.

[0009] The invention disclosed in this application has been made in consideration of the circumstances described above, and its primary object is to provide a laminated beam that can simply, economically, and accurately join two pieces of wood that make up a laminated beam, and that ensures the joining strength and structural strength over a long period of time.

[0010] Furthermore, a second object of the invention disclosed in this application is to provide a rational column-beam connection structure that can accurately integrate the connection points when erecting a column material above the middle part of the laminated beam.

[0011] In order to achieve the above-mentioned object, the invention disclosed in this application employs a laminated beam in which a plurality of beams made of wooden material with a vertically long rectangular cross section are juxtaposed so that one side of each beam abuts without any gaps over the entire length of the beams and joined in the beam width direction, and each of the beams has a plurality of pin insertion holes formed at appropriate intervals that penetrate each of the beams in the juxtaposed state in the beam width direction, and a pin member made of a rigid body is inserted into each of the pin insertion holes, thereby joining the plurality of beams together.

[0012] Furthermore, the invention disclosed in this application employs a configuration in which, in the above-mentioned laminated beam, the pin members are made up of drift pins that are inserted into the pin insertion holes, and bolts and nuts that are inserted into the pin insertion holes and fasten the laminated beams from both sides, and of the total number of pin members inserted into a set of laminated beams, more than three-quarters are drift pins, and the remainder are bolts and nuts.

[0013] In this way, a laminated beam, in which multiple beams arranged side by side with no gaps are joined by pin members, can be manufactured easily, accurately, and inexpensively. By using drift pins as pin members, multiple beams are tightly joined with high precision, which increases the long-term durability and reliability of the joint strength. In a laminated beam in which multiple beams are structurally integrated, the two beams respond in unison to the applied load without reducing their initial rigidity, and they bear the load evenly and deform evenly.

[0014] The column-beam connection structure according to the invention disclosed in the present application is a column-beam connection structure in which a single column made of a wooden material having a rectangular cross section is erected above at least one intermediate portion of the aforementioned laminated beam, and the laminated beam and the column are connected in an inverted T shape via a connector made of a rigid body, and the connector comprises a cylindrical or columnar beam connector embedded from above inside the laminated beam, and a cylindrical, columnar, or plate-shaped column base connector embedded from below in the lower end of the column. The beam connecting portion is integrally connected to the plurality of beams constituting the laminated beam by inserting pin members made of a rigid body into a plurality of pin insertion holes that pass through the embedded portion of the beam connecting portion in the laminated beam in the beam width direction, and the column base connecting portion is connected to the column by inserting pin members made of a rigid body into a plurality of pin insertion holes that pass through the embedded portion of the column base connecting portion in the column in a direction crossing the column axis of the column.

[0015] Furthermore, the column-beam connection structure is characterized in that the column is erected with its axis biased in the beam width direction of the laminated beam, and the beam connection portion is embedded inside at least one of the multiple beams that make up the laminated beam and is located directly below the column, and is connected to the other beams that make up the laminated beam.

[0016] Furthermore, the column-beam connection structure is characterized in that the connector has beam connection portions at multiple locations, and the beam connection portions are embedded inside multiple beams, including at least one beam located directly below the column, and the multiple beam connection portions and the column base connection portion are integrally connected via a connecting plate made of a rigid body interposed at the joint surface between the laminated beam and the column.

[0017] Furthermore, the column-beam connection structure is characterized in that the column material is erected with the strong axis direction of its rectangular cross section facing the beam width direction of the laminated beam, and the column base connection portion consists of at least one plate-like body that stands on the connecting plate along the strong axis direction of the column material.

[0018] Furthermore, the column-beam connection structure is characterized in that the width of the column base connection portion is set to a dimension that does not exceed the cross-sectional dimension of the column material in the strong axis direction.

[0019] These configurations enable a strong connection between the laminated beam and the pillar material erected on top of it.

[0020] Laminated beams, which are made by joining multiple beams arranged side by side with no gaps using pin members, can be manufactured easily, accurately, and inexpensively. By using drift pins as pin members, the multiple beams are tightly joined with high precision, which increases the long-term durability and reliability of the joint strength. In this way, a laminated beam, in which multiple beams are structurally integrated, responds to an applied load in unison without reducing the initial rigidity of the two beams, and bears the load evenly and deforms evenly.

[0021] Furthermore, in the column-beam connection structure in which a column is connected to the upper side of the laminated beam configured in this manner, the laminated beam and the column are firmly integrated via connectors and pin members, so that even if an eccentric load acts on the laminated beam, the eccentric load can be stably supported.

[0022] Fig. 2 is a cross-sectional view of a laminated beam according to one embodiment of the invention disclosed herein in a direction perpendicular to the material axis. Fig. 3 is a perspective view of a column-beam frame using the laminated beam shown in Fig. 1. Fig. 4 is a cross-sectional view of a column-beam connection structure at an enclosed area A in Fig. 2. Fig. 5 is a cross-sectional view of a column-beam connection structure at an enclosed area B in Fig. 2. Fig. 6 is a perspective view of a connector used at the enclosed area B.

[0023] Hereinafter, embodiments of the invention disclosed in the present application will be described with reference to the drawings.

[0024] <Laminated beam> Figure 1 is a cross-sectional view of a laminated beam 1 according to an embodiment of the invention disclosed herein, taken in a direction perpendicular to the material axis. This laminated beam 1 is composed of two beams 11 and 12 made of wooden materials with elongated rectangular cross sections, which are juxtaposed with one side of each beam abutting each other and joined in the beam width direction. The two beams 11 and 12 are made of the same material and are formed to have the same length and cross-sectional dimensions. For ease of explanation, the height of the beams 11 and 12 will be referred to as "H" and the width of the beams 11 and 12 as "W." The beams 11 and 12 may be made of solid wood, which is generally usable as a structural material for buildings, as well as laminated timber (structural laminated timber as specified by the Japanese Agricultural Standards), cross-laminated timber (CLT: Cross Laminated Timber), laminated veneer lumber (LVL: Laminated Veneer Lumber), resin-impregnated wood, composite materials (hybrid laminated timber) in which load-bearing laminated timber is laminated with a non-combustible covering material, and other wood-based materials.

[0025] The two beams 11, 12 are arranged side by side with one side of the beam abutting against the other without any gaps along the entire length of the beams, without any intervening reinforcing material between them. Each beam 11, 12 has a plurality of pin insertion holes 13 formed in alignment with each other, penetrating the beams 11, 12 in the width direction while the beams are arranged side by side. In the exemplary embodiment, as shown in FIG. 2 , a plurality of pin insertion holes 13 are formed in each of the beams 11, 12 in a vertical row at approximately equal intervals along the length of the beams 11, 12. However, the arrangement pattern of the pin insertion holes 13 is not limited to this and may be, for example, a grid or staggered (zigzag) pattern.

[0026] Pin members 2 made of steel or other rigid material are inserted into these pin insertion holes 13 to integrally join the beams 11, 12. The pin members 2 use both drift pins 21 and bolts and nuts 22 (see FIGS. 2 to 4). The drift pins 21 are inserted into the pin insertion holes 13 by lightly striking the beams 11, 12 from the side. The bolts and nuts 22 fasten the two beams 11, 12 from both side surfaces by fastening the nuts from the opposite side to the bolts inserted into the pin insertion holes 13 from the side of the beams 11, 12. Seat recesses for accommodating the bolt heads and nuts may be formed on the side surfaces of the beams 11, 12 at the locations where the bolts and nuts 22 are inserted. For these pin members 2, in addition to various alloys, for example, carbon fiber reinforced plastics (CFRP) and the like can also be used.

[0027] In this invention, drift pins 21 are used for the majority (approximately 3 / 4 or more) of the total number of pin members 2 inserted into a set of laminated beams 1, and bolts and nuts 22 are used for only the remaining few. In this way, laminated beams 1, which connect two beams 11, 12 primarily using drift pins 21, can be easily manufactured in a short time at a general wood processing plant. Since drilling accuracy is easily ensured, productivity is excellent and manufacturing costs are low. The drift pins 21 are inserted into the pin insertion holes 13 with almost no gap, generating favorable friction between them and the pin insertion holes 13, thereby tightly connecting the two beams 11, 12 with high precision. Furthermore, because drift pins 21 are less likely to bend or break than screws, fewer drift pins 21 need to be used. Furthermore, drift pins 21 are more durable than screws or bolts and nuts 22, resulting in high reliability of long-term joint strength. Furthermore, drift pins 21 are easily reusable during disassembly.

[0028] In this way, the two beams 11, 12 are structurally integrated into the laminated beam 1. The two beams 11, 12 respond to the applied load in unison without reducing their initial rigidity, and they bear the load equally and deform evenly. Therefore, even if an eccentric load (a load biased in the beam width direction) acts on the laminated beam 1, the two beams 11, 12 will not shift or twist, and the entire laminated beam 1 will not twist, and the laminated beam 1 can stably support the eccentric load. Note that this laminated beam 1 can also be constructed by joining three or more beams in the beam width direction using similar means.

[0029] <Column-beam connection structure> Figure 2 shows an example of a column-beam frame in which an eccentric load acts on the aforementioned laminated beam 1. In this column-beam frame, laminated columns 30, each consisting of two wooden columns 31 with rectangular cross sections joined together, are erected at the four corners of a structural surface that forms an elongated rectangle in plan view, and two pairs of laminated beams 1 are installed parallel to each other between the columns in the long side direction. Note that in this invention, the detailed configuration of the laminated columns 30 and the connection structure between the laminated columns 30 and the laminated beams 1 are not particularly limited.

[0030] A single pillar 32 made of wood with a square cross section is erected above the middle part (area A enclosed by an ellipse) of the laminated beam 1 on the front left side of the figure. Also, a single pillar 33 made of wood with a non-square rectangular cross section is erected above the middle part (area B enclosed by an ellipse) of the laminated beam 1 on the rear right side of the figure. These locations are inverted T-shaped pillar-beam connections, with no pillar below them to support the laminated beam 1. The connection structure between the laminated beam 1 and the pillars 32, 33 at each location will be described below.

[0031] 3 is a cross-sectional view of boxed area A. The pillar 32 erected in this area is a member whose square cross section has sides each equal in dimension to the width (W) of the beams 11, 12 on one side that make up the laminated beam 1. The pillar 32 is positioned so that its axis is biased in the beam width direction of the laminated beam 1 and rests only on the beam 11 on one side that makes up the laminated beam 1.

[0032] At this location, the laminated beam 1 and the column 32 are connected via a cylindrical or columnar connector 4A made of steel or other rigid material. The connector 4A is a component similar to a so-called "mortise and tenon pipe," in which a lower-half beam connector 41 embedded in the laminated beam 1 and an upper-half column base connector 42A embedded in the lower end of the column 32 are integrally formed and continuous. The beam connector 41 and the column base connector 42A each have a plurality of pin insertion holes 43, 44 that penetrate perpendicularly to the material axis of the connector 4A. The connector 4A can also be manufactured from various alloys, as well as carbon fiber reinforced plastics (CFRP), for example.

[0033] A bottomed vertical hole 14 into which a beam connecting portion 41 can be embedded from above is formed at the center of the beam width in one beam 11 constituting the laminated beam 1. Furthermore, pin insertion holes 13, which intersect the axis of the vertical hole 14 and penetrate the beam 11 in the beam width direction, are formed at the same height as the multiple pin insertion holes 43 formed in the beam connecting portion 41. These pin insertion holes 13 also penetrate the beam 12 on the other side, on which the column 32 is not placed. The beam connecting portion 41 is embedded in the vertical hole 14, and pin members 2 are inserted into the multiple pin insertion holes 13, 43 that penetrate the beam connecting portion 41 and the two beams 11, 12. This allows the connector 4A to be integrally connected to the two beams 11, 12 constituting the laminated beam 1.

[0034] In the illustrated embodiment, bolts and nuts 22 are inserted into the pin insertion holes 13, 43 that penetrate the beam connecting portion 41, but some or all of the pin members 2 inserted in these locations may be replaced with drift pins 21. Also, in the illustrated embodiment, multiple pin insertion holes 13 are formed vertically aligned at equal intervals below the vertical hole 14, and drift pins 21 are inserted into these pin insertion holes 13, but these pin insertion holes 13 do not necessarily have to be located directly below the connector 4A. Also, bolts and nuts 22 may be inserted into some of these pin insertion holes 13.

[0035] A bottomed vertical hole 34 into which the column base connecting portion 42A of the connector 4A can be embedded from below is formed at the lower end of the column 32, at a position aligned with the axis of the column 32. Furthermore, a pin insertion hole 35, which intersects the axis of the vertical hole 34 and penetrates the column 32, is formed at the same height as the multiple pin insertion holes 44 formed in the column base connecting portion 42A. The column base connecting portion 42A is embedded in the vertical hole 34 of the column 32, and pin members 2 are inserted into the column base connecting portion 42A and the multiple pin insertion holes 44, 35 penetrating the column 32. This allows the connector 4A to be integrally connected to the column 32. In the illustrated embodiment, drift pins 21 are inserted into the pin insertion holes 44 penetrating the column base connecting portion 42A, but some or all of the pin members 2 inserted in these locations may be replaced with bolts and nuts 22. In addition, in the illustrated embodiment, the pin insertion holes 44, 35 on the pillar material 32 side are formed in a direction parallel to the pin insertion holes 13 on the beam 1 side, but the pin insertion holes 44, 35 on the pillar material 32 side may also be formed in a direction intersecting the pin insertion holes 13 on the beam 1 side.

[0036] By cooperation of such connector 4A and pin member 2, the two beams 11, 12 that constitute the laminated beam 1 and the column 32 erected on one side of the beam 11 can be structurally integrated.

[0037] Figure 4 is a cross-sectional view of boxed area B. The column 33 erected in this location has a non-square rectangular cross section, with its cross-sectional dimension in the weak axis direction (short side dimension) approximately equal to the width (W) of one of the beams 11 constituting the laminated beam 1, and its cross-sectional dimension in the strong axis direction (long side dimension) greater than the width (W) of the beam 11 on that side but smaller than the overall width (2W) of the laminated beam 1. The column 33 is positioned with its strong axis direction (long side direction) of its cross section oriented in the beam width direction of the laminated beam 1, and one side of the column 33 aligned with one side of the laminated beam 1, offset in the beam width direction. As a result, a majority of the lower end surface of the column 33 rests on one of the beams 11 constituting the laminated beam 1, and a portion of the cross section of the column 33 rests on the beam 12 on the other side.

[0038] At this location, the laminated beam 1 and the column 33 are connected via a connector 4B as shown in Figure 5. This connector 4B is also a member made of steel or other rigid material. The connector 4B includes a connecting plate 45 that is rectangular in plan view, two cylindrical or columnar beam connecting portions 41 connected to the underside of the connecting plate 45, and a column base connecting portion 42B erected on the upper surface of the connecting plate 45. The connecting plate 45 is formed so that its short side dimension is approximately equal to the width (W) of the beams 11 and 12 and its long side dimension is equal to the width (2W) of the entire laminated beam 1.

[0039] The two beam connecting portions 41, 41 have the same outer diameter and length and are positioned below the longitudinal center line of the connecting plate 45. The two beam connecting portions 41, 41 are positioned so that their respective axes are shifted inward by half the width (½W) of the beams 11, 12 from the short sides on both sides of the connecting plate 45. Each of the two beam connecting portions 41, 41 has a plurality of pin insertion holes 43 formed therein that penetrate the connecting portion 41 in a direction parallel to the long side of the connecting plate 45.

[0040] The column base connecting portion 42B is configured as a plate-like body that rises above the longitudinal center line of the connecting plate 45 so as to be perpendicular to the connecting plate 45. The column base connecting portion 42B is formed so that its width is equal to the cross-sectional dimension of the column material 33 in the strong axis direction and its rising height is equal to or greater than the cross-sectional dimension of the column material 33 in the weak axis direction. This column base connecting portion 42B also has pin insertion holes 44 formed in multiple locations.

[0041] The two beams 11, 12 that make up the laminated beam 1 have bottomed vertical holes 14 formed at the center of the beam width of each beam 11, 12, into which the beam connecting portions 41 of the connectors 4B can be embedded. Furthermore, pin insertion holes 13 that intersect the axes of the vertical holes 14 and penetrate the two beams 11, 12 in the beam width direction are formed at the same height as the multiple pin insertion holes 43 formed in the beam connecting portions 41. The two beam connecting portions 41, 41 are embedded in the vertical holes 14, 14 of the beams 11, 12, respectively, and pin members 2 are inserted into the multiple pin insertion holes 43, 13 that penetrate the beam connecting portions 41, 41 and the two beams 11, 12. In this way, the connectors 4B are integrally connected to the two beams 11, 12 that make up the laminated beam 1.

[0042] In this exemplary embodiment, bolts and nuts 22 are inserted into the pin insertion holes 43, 13 that penetrate the beam connecting portion 41, but some or all of the pin members 2 inserted in these locations may be replaced with drift pins 21. Also, below the vertical hole 14, multiple pin insertion holes 13 are formed in a vertical row at equal intervals, and drift pins 21 are inserted into these pin insertion holes 13, but these pin insertion holes 13 do not necessarily have to be located directly below the connector 4B. Furthermore, bolts and nuts 22 may be inserted into some of these pin insertion holes 13.

[0043] A slit 36 ​​into which the column base connecting portion 42B of the connector 4B can be inserted is formed on the center line of the column 33 in the strong axis direction at the lower end of the column 33. Furthermore, pin insertion holes 35 that intersect with the slit 36 ​​and penetrate the column 33 in the weak axis direction are formed at positions that coincide with multiple pin insertion holes 44 formed in the column base connecting portion 42B. The column base connecting portion 42B is inserted into the slit 36 ​​of the column 33, and pin members 2 are inserted into the multiple pin insertion holes 44, 35 that penetrate the column base connecting portion 42B and the column 33, thereby integrally connecting the connector 4B to the column 33. Note that in the illustrated embodiment, drift pins 21 are inserted into the pin insertion holes 44, 35 that penetrate the column base connecting portion 42B, but some or all of the pin members 2 inserted in these locations may be replaced with bolts and nuts 22.

[0044] According to this connector 4B, the two beam connectors 41, 41 embedded in the two beams 11, 12, respectively, and the column base connector 42B inserted into the column 33 are integrally connected via a connecting plate 45 interposed at the joint surface between the laminated beam 1 and the column 33. Then, cooperation between this connector 4B and the pin member 2 makes it possible to structurally integrate the two beams 11, 12 that make up the laminated beam 1 and the column 33 that stands across both of them.

[0045] Furthermore, by forming this connector 4B so that the width of the column base connecting portion 42B does not exceed the cross-sectional dimension in the strong axis direction of the column material 33, interference can be prevented when attaching other components around the lower end of the column material 33.

[0046] Furthermore, the column-beam connection structure employed in this boxed area B can also be applied without any problems to a connection configuration in which the cross-sectional dimension in the strong axis direction of the column material 33 is aligned with the width (2W) of the entire laminated beam 1, and a uniform load acts in the beam width direction of the laminated beam 1. In this connection configuration, the width of the column base connection part 42B is made to match the width (2W) of the entire laminated beam 1.

[0047] Furthermore, the column-beam connection structure employed in this enclosed area B can also be configured as a column base connection section by erecting multiple plate-like bodies at appropriate intervals on the connecting plate 45. In this case, it is also possible to connect the column members 33 by forming slits in the lower ends of the column members 33 in the same number as the plate-like bodies, or by sandwiching the lower ends of the column members 33 between opposing plate-like bodies.

[0048] The technical scope of the invention disclosed herein should not be construed as being limited by the exemplified embodiments, but should be construed conceptually based on the claims. The names of elements used in the claims and the specification are for convenience in making the invention easier to understand, and the names do not unnecessarily limit the concepts or properties of the elements. When implementing the invention disclosed herein, the detailed shape, dimensions, structure, materials, quantity, connection form with other elements, relative positional relationship, etc. of elements not specifically specified in the claims may be appropriately modified within the scope of utilizing an operating principle substantially equivalent to the exemplified embodiments or within the scope of obtaining effects substantially equivalent to or greater than those of the exemplified embodiments.

[0049] Furthermore, the embodiments and other matters disclosed in this specification can also be understood as the technical ideas described in the following supplementary notes.

[0050] (Note 1) A laminated beam in which a plurality of beams made of wooden material with a vertically long rectangular cross section are juxtaposed so that one side of each beam abuts without any gaps over the entire length of the beams and joined in the beam width direction, characterized in that each of the beams has a plurality of pin insertion holes formed at appropriate intervals that penetrate each of the beams in the juxtaposed state in the beam width direction, and a pin member made of a rigid body is inserted into each of the pin insertion holes, thereby joining the plurality of beams together.

[0051] (Appendix 2) In the laminated beam described in Appendix 1, the pin members use drift pins that are inserted into the pin insertion holes, and bolts and nuts that are inserted into the pin insertion holes and fasten the laminated beam from both sides, and two-thirds or more of the total number of pin members inserted into a set of laminated beams are drift pins, with the remainder being bolts and nuts.

[0052] (Appendix 3) A column-beam connection structure in which a single column made of wood and having a rectangular cross section is erected above at least one intermediate portion of the laminated beam described in Appendix 1 or 2, and the laminated beam and the column are connected in an inverted T shape via a connector made of a rigid body, wherein the connector comprises a cylindrical or columnar beam connection part embedded inside the laminated beam from above, and a cylindrical, columnar, or plate-shaped column base connection part embedded in the lower end of the column from below, the beam connection part is connected integrally with the multiple beams constituting the laminated beam by inserting rigid pin members into multiple pin insertion holes that pass through the embedded portion of the beam connection part in the laminated beam in the beam width direction, and the column base connection part is connected to the column by inserting rigid pin members into multiple pin insertion holes that pass through the embedded portion of the column base connection part in the column in a direction crossing the column axis of the column.

[0053] (Appendix 4) A column-beam connection structure according to Appendix 3, characterized in that the column is erected with its axis offset in the beam width direction of the laminated beam, and the beam connection portion is embedded inside at least one beam located directly below the column among the multiple beams that make up the laminated beam, and is connected together with the other beams that make up the laminated beam.

[0054] (Appendix 5) A column-beam connection structure as described in Appendix 4, characterized in that the connector is provided with beam connection parts at multiple locations, the beam connection parts are embedded inside multiple beams including at least one beam located directly below the column, and the multiple beam connection parts and the column base connection part are integrally connected via a connecting plate made of a rigid body interposed at the joint surface between the laminated beam and the column.

[0055] (Appendix 6) In the column-beam connection structure described in Appendix 5, the column material is erected with the strong axis direction of its rectangular cross section facing the beam width direction of the laminated beam, and the column base connection portion is made of at least one plate-like body that stands on the connection plate along the strong axis direction of the column material.

[0056] (Appendix 7) In the column-beam connection structure described in Appendix 6, the column-beam connection structure is characterized in that the width of the column base connection part is set to a dimension that does not exceed the cross-sectional dimension of the column material in the strong axis direction.

[0057] The invention disclosed in this application can be widely used in wooden building frames.

[0058] DESCRIPTION OF SYMBOLS 1 Laminated beam 11 Beam material 12 Beam material 13 Pin insertion hole 14 Vertical hole 2 Pin member 21 Drift pin 22 Bolt / nut 30 Laminated column 31 Column material 32 Column material 33 Column material 34 Vertical hole 35 Pin insertion hole 36 Slit 4A, 4B Connector 41 Beam material connecting portion 42A, 42B Column base connecting portion 43 Pin insertion hole 44 Pin insertion hole 45 Connecting plate

Claims

1. A laminated beam in which a number of wooden beams each having a vertically long rectangular cross section are juxtaposed so that one side of each beam abuts against each other without any gaps over the entire length of the beams and joined in the beam width direction, wherein each of the beams has a number of pin insertion holes formed at appropriate intervals that penetrate each of the beams in the beam width direction while juxtaposed, and a rigid pin member is inserted into each of the pin insertion holes to join the multiple beams together.

2. A laminated beam as described in claim 1, wherein the pin members are a combination of drift pins inserted into the pin insertion holes and bolts and nuts inserted into the pin insertion holes to fasten the laminated beam from both sides, and at least two-thirds of the total number of pin members inserted into a set of laminated beams are drift pins, with the remainder being bolts and nuts.

3. A column-beam connection structure in which a single column made of wood having a rectangular cross section is erected above at least one intermediate portion of the laminated beam described in claim 1 or 2, and the laminated beam and the column are connected in an inverted T shape via a connector made of a rigid body, wherein the connector comprises a cylindrical or columnar beam connection part embedded inside the laminated beam from above, and a cylindrical, columnar or plate-shaped column base connection part embedded in the lower end of the column from below, the beam connection part is connected integrally to the multiple beams constituting the laminated beam by inserting rigid pin members into multiple pin insertion holes that pass through the embedded portion of the beam connection part in the laminated beam in the beam width direction, and the column base connection part is connected to the column by inserting rigid pin members into multiple pin insertion holes that pass through the embedded portion of the column base connection part in the column in a direction crossing the column axis of the column.

4. A column-beam connection structure as described in claim 3, characterized in that the column is erected with its axis offset in the beam width direction of the laminated beam, and the beam connection portion is embedded inside at least one of the multiple beams constituting the laminated beam that is located directly below the column, and is connected to the other beams constituting the laminated beam.

5. A column-beam connection structure as described in claim 4, characterized in that the connector is provided with beam connection parts at multiple locations, the beam connection parts are embedded inside multiple beams including at least one beam located directly below the column, and the multiple beam connection parts and the column base connection part are integrally connected via a connecting plate made of a rigid body interposed between the joint surface between the laminated beam and the column.

6. A column-beam connection structure as described in claim 5, characterized in that the column is erected with the strong axis direction of its rectangular cross section facing the beam width direction of the laminated beam, and the column base connection part consists of at least one plate-like body that stands on the connecting plate along the strong axis direction of the column.

7. A column-beam connection structure as described in claim 6, characterized in that the width of the column base connection part is set to a dimension not exceeding the cross-sectional dimension of the column material in the strong axis direction.

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