JP4943819B2 - Beam connection structure - Google Patents

Description

  The present invention relates to a structure of a structure in which a structural frame is mainly constructed of wood, and relates to a bonded structure in which the edge of another beam is opposed to the side of the beam, and in particular, a wooden beam and a steel beam are bonded. It is related to the structure.

  In a construction method that has been widely used for a long time as a joint structure between a beam and a wooden building, a notch is provided in the receiving beam, and a joint that is fitted into the notch is applied to the beam to be crossed. In such a joint structure, in order to cut both beams, a high level of technology is required, and the cost for processing increases. In recent years, a joint structure has been proposed in which metal is used for the joint between the beams to reduce the processing of the members and can be easily joined in the field.

For example, Patent Document 1 describes a beam joining structure as shown in FIG.
In this joining structure, the end face of the second wooden beam 122 is abutted against the side face of the first wooden beam 121 and joined, and a vertical hole 121a is formed in the first wooden beam. A first screw member 131 having a spiral projecting portion is screwed into this hole. A screw hole 131 a is provided in the first screw member in a direction perpendicular to the axis, and a bolt 134 is inserted into a lateral hole 121 b that faces the first screw member 131 from the side surface of the first wooden beam 121. The bolt 134 is screwed into the screw hole 131a to fix the beam joint 133 to the side surface of the first wooden beam 121. On the other hand, the second screw member 132 is also screwed into the end portion of the second wooden beam 122, and a pin 133 penetrating the second wooden beam 122 and the second screw member 132 is provided in the hole 133a provided in the beam joining bracket. Insert through. In this way, the second wooden beam 122 is connected to the beam joint metal 133. In such a joint structure, a large vertical force is smoothly transmitted between both beams via the screw members 131 and 132 and the beam joint metal 133. In addition, the force in the vertical direction is transmitted over the entire height of the beam, so that local stress concentration is prevented.
JP 2004-92149 A

In recent years, there has been an increasing demand for large spaces with few pillars indoors even in wooden buildings. It may also be required to provide a large opening. In such a case, the span of the beam becomes large, and the value of the bending moment generated in the beam becomes large. In order to resist a large bending moment, it is necessary to increase the cross section of the beam, in particular the height of the beam, but this may cause trouble in the fitting of the beam, which is not economically practical.
In addition, the second floor may be provided so as to protrude from the first floor. In such a case, the beam protrudes in a cantilever manner, and a large bending moment is generated in the portion that supports the beam. Moreover, the bending of the end of the overhanging beam becomes large, and the creep bending that progresses with time may become a problem.
In the above cases, it is reasonable and economical to use steel beams for some of the beams even in the case of so-called wooden buildings where the structural frame is mainly constructed of wood. is there. For this reason, the structure which joins a wooden beam and a steel beam with a simple structure is desired.

  This invention is made | formed in view of the above situations, and it aims at providing the structure which joins a wooden beam and a steel beam simply and firmly.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a steel beam in which a beam joint is fixed to a side surface of a wooden beam and an end surface thereof is opposed to the side surface of the wooden beam. A joining structure of a wooden beam and a steel beam coupled to a metal fitting, wherein the beam joining metal fitting includes a first joint plate portion that is in contact with a side surface of the wooden beam, and the first joint plate portion Two substantially parallel second joint plate portions protruding substantially vertically from both side edges of the first joint plate, the first joint plate portion being fixed to the wooden beam by a first bolt, A second bolt is inserted into a through hole provided in the joint plate portion and a horizontal through hole provided in the steel beam, and the second bolt is inserted between the second joint plate portion and the steel beam. A cylindrical member through which the second bolt is inserted is inserted, and the second bolt is made of the second joining plate portion and the steel. And clamping said tubular member, said tubular member and the second joint plate portion, and said tubular member and the steel beam to provide a bonding structure of the beam being pressed.

  In this joint structure, after the beam joint is attached to the wooden beam by the first bolt, the beam joint and the steel beam are joined by the second bolt that penetrates the steel beam and the beam joint in the horizontal direction. Can be easily fixed. As a result, a vertical force is transmitted from the steel beam to the second joint plate portion of the beam joint bracket via the bolt, and further, the wooden force is transmitted from the first joint plate portion of the beam joint bracket to the second joint plate portion via the first bolt. Transmitted to the beam.

  Moreover, in this joining structure, the cylindrical member is inserted between the two second joining plate portions and the side surface of the steel beam, and the second bolt is inserted into the cylindrical member. 2 joint plate parts, cylindrical members and steel beams are fastened. Thereby, while the space | interval of the 2nd joining board part of a beam joining metal fitting and the side surface of a steel beam is restrained by a cylindrical member, it couple | bonds so that a steel beam and a beam joining metal fitting may be united. That is, the steel beam is firmly coupled to the wooden beam without causing displacement or rattling.

  Furthermore, by appropriately setting the length of the tubular member, a vertical force is transmitted almost evenly from the steel beam to the two second joint plates, and a large force is exerted on the beam joint metal in the twisting direction. The vertical force is smoothly transmitted to the wooden beam.

  The invention according to claim 2 is the joining structure of beams according to claim 1, wherein a screw member having a screw hole or a through hole in the horizontal direction is screwed into the wooden beam in the vertical direction. The bolt is inserted into a lateral hole extending from the side surface of the wooden beam to the screw member and screwed into the screw hole, or is passed through the through hole and the wooden beam and is tightened with a nut to thereby tighten the wooden It is assumed that the beam joint fitting is fixed to the side surface of the beam.

  In this joining structure, the screw member is vertically penetrated into the wooden beam, and the vertical force from the steel beam is transmitted to the screw member via the beam joining bracket and the first bolt, and the circumferential surface of the screw member Is transmitted to wooden beams. Therefore, the force in the vertical direction is transmitted from the screw member to the wooden beam in a wide range in the vertical direction, and it can be avoided that a large stress is locally generated. Further, when the steel beam is joined to the end portion of the wooden beam, the wooden beam is prevented from being cracked by the screw member screwed in the vertical direction.

According to a third aspect of the present invention, a beam joining bracket is fixed to a side surface of a steel beam having a vertical web and horizontal flanges above and below the vertical web, and an end surface is arranged to face the side surface of the web. A wooden beam and a steel beam in which a wooden beam is coupled to the beam joint, wherein the beam joint is a first joint plate portion that abuts against a web side surface of the steel beam. And two substantially parallel second joining plate portions protruding substantially vertically from both side edges of the first joining plate portion, and the first joining plate portions are fixed to the steel beam by bolts. The second joining plate portion is provided so as to protrude from the front end edge of the flange, and an upper portion is opened to a portion protruding from the front end edge, and the second joint plate portion is preliminarily penetrated horizontally in the wooden beam in advance. A notch is provided to lock the supporting pin or bolt. The notch portion has a substantially horizontal base on which the locked support pin or bolt for erection can be slid toward the first joining plate portion side, and the steel The pin or bolt can be locked to the joint fitting by lowering the wooden beam from above at a position away from the steel beam from the protruding edge of the flange of the beam. The notch is formed so that a wooden beam is inserted between the upper and lower flanges of the steel beam, and the end surface of the wooden beam can be moved to a position in contact with or close to the side surface of the web of the steel beam. The wooden beam is provided on the second joining plate portion at a position where the pin or bolt is locked in the notch and the end surface is in contact with or close to the side surface of the web of the steel beam. By means of a through hole and a pin or bolt for fixing a wooden beam passing through the wooden beam. It is intended to provide a joint structure of the beam, characterized in that coupled with the joint device.

  In this joint structure, when the beam joint is attached to the steel beam web, the second joint plate portion of the beam joint metal protrudes from the tip of the steel beam web. A notch is provided in a portion protruding from the leading edge of the web. Therefore, by lowering the wooden beam from above with the end face in contact with or close to the leading edge of the web of the steel beam, this wooden beam is attached to the second joint plate portion by the pin or bolt penetrated into the wooden beam. Can be locked. Then, by pushing the wooden beam toward the steel beam, the pin or bolt slides on the bottom of the notch, and the end surface of the wooden beam moves to a position in contact with or close to the steel beam web. By fixing the wooden beam to the beam joint at this position, the vertical force acting on the second joint plate of the beam joint from the wooden beam acts at a position close to the joint surface with the steel beam. The load on the joint fitting and the bolt that secures it to the steel beam is significantly reduced. Therefore, the wooden beam is firmly fixed to the side surface of the steel beam.

  As described above, in the beam joining structure according to the present invention, the steel beam end surface is opposed to the side surface of the wooden beam or the wooden beam end surface is opposed to the side surface of the steel beam via the beam joining bracket. Thus, the wooden beam and the steel beam can be joined. Thereby, a steel beam can be utilized for a part of structural frame which mainly uses wood, and these can be joined firmly.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing a structural frame of a wooden building in which a beam joining structure according to the present invention is suitably used.
This structural frame is formed by combining a plurality of rigid frame structures obtained by joining wooden columns and wooden beams or steel beams so that a bending moment can be transmitted. The wooden column 1 and the wooden beam 2 constituting each of the rigid frame structures are flat members with a large cross-sectional dimension in a direction parallel to the plane including the axis of the rigid frame structure and a small cross-sectional dimension in a direction perpendicular thereto. It has become. Further, the steel beam 22 has an I-shaped cross section whose dimensions are increased in the height direction, that is, in a direction parallel to the plane including the axis of the frame structure. Therefore, each member of each frame structure is used as a member that resists bending in one direction, and a plurality of one-way frames are combined to constitute the entire structural frame. Each of the rigid frame structures has a so-called beam winning structure in which beams are brought into contact with and joined to the upper end surfaces of the columns, and a plurality of rigid frame structures are connected to each other by joining the beams.

  The ramen frame has a structure in which a large opening is provided with a large span of beams, and the second floor portion projects from the first floor portion, and the beam 22 in this portion is made of steel. And the end surface of this steel beam 22 is made to oppose the side surface of the wooden beam 21, and it joins with this wooden beam. Further, other wooden beams 25 and 26 are disposed so that the end surfaces thereof face the side surfaces of the steel beam, and the wooden beams are also joined to the steel beam 22.

  FIG. 2 is an exploded perspective view showing an embodiment of the invention according to claims 1 and 2, which is a beam joining structure used in the structural housing shown in FIG. 1. 3 is an elevational sectional view of the same joint structure, FIG. 4 is a plan sectional view, and FIG. 5 is an elevational sectional view taken along the line CC in FIGS. In this joining structure, the end face of the steel beam 22 is opposed to the side surface of the wooden beam 21 to join both, and the first screw member 31 screwed into the wooden beam 21 and the steel beam 22 are joined to the beam. It connects via the joining metal fitting 33. FIG. For the steel beam 22, a member having substantially the same height as the wooden beam 21 and having an I-shaped cross-section is used.

As shown in the plan view, the front view, and the side view in FIG. 6, the screw member 31 is provided with a spiral projecting portion 31a on the side surface of a rod-shaped steel member, and axially extends from both end portions to the axial direction. Is provided with a screw hole 31b. Further, a through hole 31c is provided in the middle portion in the length direction in a direction perpendicular to the axis, and a female screw is cut on the inner peripheral surface of the through hole.
As shown in FIG. 2, the screw member 31 is provided with a vertical through hole 21a at a predetermined position of the wooden beam 21, and further screwed after cutting a spiral groove. The length of the end surface is adjusted so as to substantially coincide with the upper and lower surfaces of the wooden beam 21 or slightly inside the member.

  As shown in FIG. 2, the beam joining bracket 33 is raised in parallel from the first joining plate portion 33 a that is in contact with the side surface of the wooden beam and from both side edges in the vertical direction of the first joining plate portion 33 a. And a plurality of bolt holes 33c through which bolts 34 for fixing the beam joint fitting to the wooden beam 21 are inserted into the first joint plate portion 33a. Is provided. Further, the second joint plate portion 33b is provided with a plurality of holes 33d through which bolts 35 for coupling the beam joint bracket 33 to the steel beam 22 are inserted and notches 33e into which the bolts are locked. Yes. The beam joint metal 33 is formed by bending a steel plate and has a thickness that does not cause excessive deformation during use.

  The wooden beam 21 is provided with a lateral hole 21b extending from the side surface to the peripheral surface of the first screw member 31. The beam joint 33 is fixed to the side surface of the wooden beam 21 by a bolt 34 that is inserted into the horizontal hole 21b from the side surface of the wooden beam 21 and screwed into the through hole 31c of the screw member.

The steel beam 22 can be a member obtained by processing a structural steel plate so that the cross-sectional shape is I-shaped, or a steel having an I-shaped cross-section formed by rolling, and a bolt 22 is attached to the end of the web 22a. A plurality of holes 22 d through which 35 is inserted are provided. Further, when the upper flange 22b is brought into contact with or in close proximity to the side surface of the wooden beam 21, the end surface of the upper flange 22b is used to avoid interference with the head of the bolt 34 that joins the beam joint fitting 33 to the wooden beam 21. It is cut out so as to recede from the edge. On the other hand, the lower flange 22c is notched at the end so as not to interfere with the second joint plate 33b of the beam joint 33 when the steel beam 22 is lowered from above and supported at a predetermined position. Yes. Such a steel beam 22 is supported so that the center line of the web 22a coincides with the center line of the beam joint 33, that is, the web 22a is supported between the two second joining plate portions 33b. It is combined with the beam joint bracket 33.

  A spacer pipe 36, which is a steel tubular member, is interposed between the web 22a at the end of the steel beam and the second joint plate portion 33b of the beam joint metal on both sides thereof. As shown in FIGS. 2, 4 and 5, the spacer pipes 36 are respectively inserted between the two second joining plate portions 33b and the steel beam webs 22a, so that the steel beam webs 22a are inserted. And the relative position between the second bonding plate portion 33b. A bolt 35 is inserted into the hole 33d of the second joint plate portion and the spacer pipe 36 to connect the steel beam 22 and the beam joint metal 33, and is provided on the steel beam web 22a. It arrange | positions so that the hole 22d made may be penetrated. Then, the two second joining plate portions 33b, the two spacer pipes 36, and the steel beam web 22a are fastened, and these are pressed and joined together.

  In such a joint structure, the vertical force acting on the steel beam 22 is the second joint of the beam joint metal via the bolt 35 or the spacer pipe 36 penetrating the hole 22d of the steel beam 22 in the horizontal direction. The plate portion 33b is transmitted. And it is transmitted to the screw member 31 through the bolt 34 from the 1st joining board part 33a. In the screw member 31, a protruding portion 31 a on the peripheral surface is locked to the wooden beam 21, and a vertical force is transmitted from the peripheral surface over the entire length of the screw member 31 to the wooden beam 21.

The beams can be joined by the joining structure as described above as follows.
First, the screw member 31 is screwed into the wooden beam 21, and the beam joint 33 is fixed to the side surface of the wooden beam 21 with the bolt 34. On the other hand, the steel beam 22 has only one uppermost bolt 35a penetrating from the side. As shown in FIG. 2, the second joining plate portion 33b of the beam joining bracket is provided with a notch 33e that is open at the top and is engaged with the uppermost bolt 35a. Is lowered to a predetermined position, the uppermost bolt 35 a is locked to the notch 33 e of the beam joint 33. In this way, the steel beam 22 is temporarily supported at a predetermined position, and then the remaining bolts 35 are inserted so as to penetrate the beam joint 33 and the steel beam 22.

  At the time of bolt insertion, the spacer pipe 36 is disposed at a predetermined position and temporarily supported, and the bolt 35 is inserted. The beam joining bracket 33 and the steel beam 22 are connected by screwing a nut into a bolt 35 penetrating the second joining plate portion 33b of the beam joining bracket, the spacer pipe 36 and the steel beam web 22a and tightening. The By tightening the bolts, the end face of the spacer pipe 36 is pressed against the second joining plate portion 33b and the steel beam web 22a, respectively, and the second joining plate portion 33b and the steel beam web 22a are integrated. It becomes. Thereby, the wooden beam 21 and the steel beam 22 are firmly joined.

FIG. 7 is a schematic perspective view showing a beam joining structure which is another embodiment of the invention according to claims 1 and 2.
The steel beam 23 used in this embodiment is formed of a steel mold having a groove-shaped cross section. Even in the steel beam having such a cross section, the web 23a is supported at the substantially central portion between the two second joining plate portions 33b of the beam joining metal fitting 33. Similarly to the joining structure shown in FIGS. 2 to 5, a spacer pipe 36 is inserted between the second joining plate portion 33b and the steel beam web 23a, and tightened by a bolt 35 penetrating them. It has been.
In this connection structure, the beam connection fitting 33 is the same as the connection structure shown in FIG. 2, and the screw member 31 is similarly penetrated into the wooden beam 21 in the vertical direction. The bracket is fixed with bolts.

  Even in such a joint structure, the vertical force acting on the steel beam 23 is transmitted from the web 23 a along the center line of the beam joint 33, and is transmitted to the screw member 31 without causing the beam joint 33 to be twisted. Is done.

FIG. 8 and FIG. 9 are cross-sectional views showing another example of a structure for joining the beams used in the structural frame shown in FIG. 1 and joining the side faces of the wooden beams with the end faces of the steel beams facing each other. FIG. 8 is a vertical sectional view, and FIG. 9 is a flat sectional view. FIG. 10 is a schematic perspective view of a beam joint used in this joint structure.
In this joining structure, the end face of the steel beam 24 is opposed to the side surface of the wooden beam 21, and the first screw member 31 screwed into the wooden beam 21 and the beam joining metal fitting 43 fixed to the wooden beam are used. To be joined. In this embodiment, the steel beam 24 is a member having an I-shaped cross section, and the screw member 31 shown in FIG. 6 is used.

  As shown in FIG. 10, the beam joining metal fitting 43 includes a first joining plate portion 43a that is in contact with the side surface of the wooden beam 21, and a right angle along the vertical center line of the first joining plate portion 43a. The joined second joining plate portion 43b, the upper joining plate portion 43c joined to the upper edges of the first joining plate portion and the second joining plate portion, and supported horizontally, the first joining plate portion and the first joining plate portion The lower plate 43d is horizontally joined to the lower edge of the second joined plate portion. The first joint plate portion 43a is provided with a plurality of bolt holes 43e through which the bolts 34 are inserted along the center line in the vertical direction. The second joint plate portion 43b is provided with a horizontal notch 43f at a position corresponding to the bolt hole 43e provided in the first joint plate portion 43a. This notch 43f is equal to or longer than the length of the bolt 34 in the horizontal direction from the joint line with the first joint plate 43a so that the bolt 34 inserted into the bolt hole 43e does not interfere with the second joint plate 43b. It reaches the depth. A bolt hole 43g for joining to the steel beam 24 is formed in the vicinity of the opposite edge of the second joining plate portion 43b.

  The wooden beam 21 is formed with a lateral hole extending from the side surface to the peripheral surface of the screw member 31, and a bolt inserted into a bolt hole 43e provided in the first joint plate portion 43a of the beam joint metal. 34 is inserted into the horizontal hole from the side surface of the wooden beam 21 and screwed into the through hole 31 c of the first screw member 31. By tightening the bolt 34, the beam joint metal 43 is fixed to the side surface of the first wooden beam 21.

  On the other hand, the end portion of the steel beam 24 is disposed in contact with or close to the end surface of the second joint plate portion 43b of the beam joint fitting. The steel beam web 24 a is provided with a plurality of bolt holes through which the bolts 45 are inserted, and the attachment plate 46 is fixed to the second joint plate portion 43 b of the beam joint metal 43 by the bolts 45. The attachment plate 46 is also fixed to the steel beam web 24 a by bolts 45. Thereby, the beam joining metal fitting 43 is firmly joined to the steel beam 24.

  In such a joining structure, the vertical force acting on the steel beam 24 is transmitted to the beam joining metal fitting 43 via the attachment plate 46, and the screw member via the bolt 34 from the first joining plate portion 43a. 31. A vertical force is transmitted to the wooden beam 21 from the circumferential surface over the entire length of the screw member 31.

11 and 12 are cross-sectional views showing an example of a structure in which the end face of the wooden beam is opposed to the side surface of the steel beam for reference , FIG. 11 is a vertical cross-sectional view, and FIG. 12 is a flat cross-sectional view. .
In this joining structure, the end face of the wooden beam 25 is opposed to the side surface of the steel beam 22, and the steel beam 22 and the wooden beam 25 are joined via a beam joining metal fitting 53. As the wooden beam 25, one having a beam height smaller than that of the steel beam 22 is used according to the magnitude of the acting bending moment.

As shown in FIG. 12, the beam joining metal fitting 53 includes a first joining plate portion 53a that is in contact with the side surface of the steel beam 22, and a first side from two opposing sides of the first joining plate portion 53a. A plurality of bolt holes through which the bolts 54 are inserted are provided in the first joint plate portion 53a, which has two second joint plate portions 53b that are bent substantially at right angles to the joint plate portion and are parallel to each other. Is provided. The second bonding plate portion 53b is provided with a hole 53c through which the pin 55b is inserted and a notch 53d at which the pin 55a is locked. As shown in FIG. 11, the second joint plate portion 53b has a horizontal dimension larger than the overhang length of the flange 22b of the steel beam, and the hole 53c provided in the second joint plate portion 53b. And the notch 53d is provided in the position which protruded from the front-end edge of the flange 22a of steel beams.
Further, the beam joint metal 53 has a vertical dimension that is smaller than the height of the wooden beam 25 corresponding to the dimension of the wooden beam 25, and the number of bolt holes is adjusted accordingly.
The beam joint metal 53 is formed by bending a steel plate, and has a thickness that does not cause excessive deformation during use, similar to that used in the joint structure shown in FIG. Is.

  A member having an I-shaped cross section is used for the steel beam 22, a horizontal hole is provided in the web 22 a, and the beam joining metal 53 is fixed to the side surface of the web 22 a by a bolt 54 inserted through the horizontal hole. .

On the other hand, at the end of the wooden beam 25, two slits 25a parallel to both side surfaces of the beam are formed from the end surface. The two second joint plate portions 53b of the beam joint metal 53 are inserted into the slits, and the pins 55a and 55b inserted from the side surfaces of the wooden beam 25 are engaged with the notches 53d of the second joint plate portion. It is stopped and inserted into the hole 53c.
The wooden beam 25 may have a screw member screwed in the vertical direction so that the pin penetrates the screw member as shown in FIG. 2. However, as shown in FIGS. A force may be transmitted from the peripheral surface of the pin to the wooden beam 25 without using a member.

  In the joining structure as described above, the second joining plate portion 53b of the beam joining metal fitting 53 fixed to the steel beam 22 protrudes from the flange 22b of the steel beam. Therefore, the lifted wooden beam 25 can be lowered from above, and the pin 55a inserted through the wooden beam 25 in advance can be locked to the notch 55d provided in the second joining plate portion. Then, the wooden beam 25 and the beam joint metal 53 can be coupled by inserting the other pin 55b into the hole 53c provided in the wooden beam 25 and the second joint plate portion 53b. As a result, the wooden beam 25 and the steel beam 22 are joined, and the vertical force acting on the wooden beam 25 is transmitted to the web of the steel beam 22 via the beam joint fitting 53.

13 and 14 are cross-sectional views showing an embodiment of the invention according to claim 3 , FIG. 13 is a vertical cross-sectional view, and FIG. 14 is a flat cross-sectional view.
This joining structure also joins the side face of the steel beam 22 with the end face of the wooden beam 26 facing each other. In this joining structure, the end face of the wooden beam 26 is joined to the steel beam web 22a having an I-shaped cross section. Are joined in close proximity or abut.

  As shown in FIG. 16, the beam joining metal fitting 63 is raised in parallel from a first joining plate portion 63a that is in contact with the side surface of the steel beam 22 and two opposing sides of the first joining plate portion 63a. The first joint plate portion 63a is provided with a plurality of bolt holes 63c through which the bolts 64 are inserted. The second joining plate portion 63b has a horizontal dimension larger than the overhang length of the upper flange 22b of the steel beam 22, is provided with a plurality of holes 63d through which the pins 65b are inserted, and has a wooden beam at the top. 26 is provided with a notch 63e for locking the pin 65a penetrating through the pin 26a. The notch 63e extends from a position protruding from the tip edge of the upper flange 22b to the inside of the tip edge, and the bottom of the notch 63e has a smooth and horizontal edge.

  The beam joint 63 is in contact with the side surface of the steel beam web 22a having an I-shaped cross section, and is formed in a bolt hole 63c provided in the first joint plate portion 63a and a lateral hole provided in the web 22a. The bolt 64 inserted is fixed to the steel beam 22.

  On the other hand, the end portion of the wooden beam 26 is formed with two slits 26a parallel to both side surfaces from the end surface, and the second joining plate portion 63b of the beam joining metal fitting is inserted into each slit 26a. Yes. The portion 26b between the two slits 26a of the wooden beam 26 is cut when the tip is cut as shown in FIG. 14, and the portion 26c outside the slit 26a is abutted against the steel beam web 22a. The first joint plate 63a and the bolt 64 are prevented from hitting the heads. Further, as shown in FIG. 13, the top of the wooden beam 26 is cut out so as not to interfere with the upper flange 22b of the steel beam, so that the wooden beam 26 enters the lower side of the upper flange 22b. Further, the height of the beam is selected so that the lower surface of the wooden beam 26 is higher than the lower flange 22c of the steel beam, or a notch is provided so that the wooden beam 26 has a lower flange of the steel beam. It is designed to enter above 22c.

  The pin 65 inserted from the side surface of the wooden beam 26 is inserted into the hole 63d of the second joint plate portion 63b, and the uppermost pin 65a is inserted into the notch 63e provided in the second joint plate portion 63b. The vertical force that is locked and acts on the wooden beam 26 is transmitted to the beam joint 63 through these pins 65.

The beams can be joined by the joining structure as described above as follows.
First, the beam joint 63 is fixed to the side surface of the steel beam 22 with the bolt 64. On the other hand, the wooden beam 26 has only one uppermost pin 65a inserted from the side. A notch 63e provided in the second joint plate portion 63b of the beam joint is opened upward, the suspended wooden beam 26 is lowered from above to a predetermined position, and the second joint of the beam joint is placed in the slit 26a. When the joining plate portion 63b is inserted, as shown in FIG. 15, the uppermost pin 65a penetrating the wooden beam 26 is locked to the notch 63e of the beam joining metal fitting. In this way, the wooden beam 26 is temporarily supported at a predetermined position.

  Thereafter, the wooden beam 26 is pushed into the steel beam side so that the end surface of the wooden beam 26 abuts against the side surface of the steel beam web 22a. At that time, the pin 65a slides on the bottom of the notch 63e, and the wooden beam 26 moves to the steel beam side while being supported by the second joining plate portion 63b, and the end face is abutted against the steel beam web 22a. . The hole 63d provided in the second joining plate portion 63b and the lateral hole 26d provided in the wooden beam 26 are adjusted so as to coincide when the end surface of the wooden beam 26 is abutted against the web 22a as described above. The steel beam 22 and the wooden beam 26 are firmly joined by inserting the pin 65 so as to penetrate the wooden beam 26 and the second joining plate portion 63b.

In such a joint structure, the vertical force acting on the wooden beam 26 is transmitted to the second joint plate portion 63b of the beam joint metal via the pin 65 penetrating the wooden beam 26 in the horizontal direction. 1 is transmitted to the steel beam 22 through the bolt 64 from the joint plate portion 63a. At this time, the wooden beam 26 is supported to a position close to the web 22a by being pushed to a position where it abuts on or close to the web 22a of the steel beam. The load on the plate portion 63a, the second joining plate portion 63b, and the bolt 64 is reduced and the members are firmly joined.
In the above-mentioned joint structure, an I-shaped steel or an H-shaped steel can be used as a steel beam having an I-shaped cross section, and a member having an I-shaped cross section by contacting the back surfaces of two groove-shaped steels. It can also be used.

It is a schematic perspective view which shows the structural frame of the building in which the junction structure of the beam which concerns on this invention is used suitably. It is a disassembled perspective view which shows the joining structure of the beam which is one Embodiment of the invention which concerns on Claim 1 or Claim 2. FIG. 3 is an elevational sectional view of the joint structure shown in FIG. 2. FIG. 3 is a plan sectional view of the joint structure shown in FIG. 2. FIG. 4 is an elevational sectional view of the joint structure shown in FIG. 2, which is a sectional view taken along the line CC shown in FIGS. 2 and 3. FIG. 3 is a plan view, a front view, and a side view of a screw member used in the joining structure shown in FIG. 2. It is an elevational sectional view showing a joint structure of a beam which is another embodiment of the invention according to claim 1 and claim 2. It is an elevational sectional view showing another example of a structure in which an end surface of a steel beam is opposed to a side surface of a wooden beam for reference . FIG. 9 is a plan sectional view of the joint structure shown in FIG. 8. It is a schematic perspective view of the beam joining metal fitting used with the joining structure shown in FIG. It is an elevational sectional view showing an example of a structure in which an end face of a wooden beam is opposed to a side surface of a steel beam for reference . It is a plane sectional view of the junction structure shown in FIG. It is an elevational sectional view showing a joint structure of a beam which is one embodiment of the invention according to claim 3 . FIG. 14 is a plan sectional view of the joint structure shown in FIG. 13. FIG. 14 is an elevational sectional view showing a state during construction of the joint structure shown in FIG. 13. It is a schematic perspective view of the beam joining metal fitting used with the joining structure shown in FIG. It is a disassembled perspective view which shows an example of the joining structure of the beam known conventionally.

1: wooden pillar, 2: wooden beam,
21, 25, 26: wooden beams, 21d: horizontal holes, 22, 23, 24: steel beams, 22a, 23a, 24a: webs of steel beams, 22d: holes,
31: Screw member, 31a: Through hole, 33: Beam joint fitting, 33a: First joint plate part, 33b: Second joint plate part, 33c: Bolt hole, 33d: Hole, 33e: Notch, 34: Bolt, 35: Bolt, 36: Spacer pipe, 43: Beam joint metal fitting, 43a: First joint plate portion, 43b: Second joint plate portion, 43c: Upper plate, 43d: Lower plate, 43e: Bolt hole, 43f: Notch, 43g: Bolt hole, 45: Bolt, 46: Additional plate, 53: Beam joint metal, 53a: First joint plate part, 53b: Second joint plate part, 53c: Hole, 53d: Notch, 54: Bolt, 55: Pin, 63: Beam joint fitting, 63a: First joint plate part, 63b: Second joint plate part, 63c: Bolt hole, 63d: Hole, 63e: Notch, 64 : Bolt, 65: Pi

Claims (3)

A beam connecting bracket is fixed to the side surface of the wooden beam, and a steel beam arranged such that the end surface faces the side surface of the wooden beam is joined to the beam connecting bracket. There,
The beam joint metal fitting includes a first joint plate portion that is in contact with a side surface of the wooden beam, and two substantially parallel second joints protruding substantially vertically from both side edges of the first joint plate portion. Having a plate part,
The first joining plate portion is fixed to the wooden beam by a first bolt;
A second bolt is inserted through a through hole provided in the second joining plate portion and a horizontal through hole provided in the steel beam;
A cylindrical member through which the second bolt is inserted is inserted between the second joining plate portion and the steel beam,
The second bolt fastens the second joining plate portion, the steel beam, and the tubular member, and the second joining plate portion, the tubular member, and the steel beam and the tubular shape. A joint structure of a beam, characterized in that the member is press-contacted. In the wooden beam, a screw member having a horizontal screw hole or a through hole is screwed in the vertical direction,
The first bolt is inserted into a lateral hole extending from a side surface of the wooden beam to the screw member and screwed into the screw hole, or is passed through the through hole and the wooden beam and is tightened by a nut. The beam joining structure according to claim 1, wherein the beam joining metal fitting is fixed to a side surface of the wooden beam. A beam joint is fixed to the side of the web of a steel beam having a vertical web and horizontal flanges above and below it, and a wooden beam arranged so that the end surface faces the side of the web is the beam joint. A joint structure of a wooden beam and a steel beam combined with
The beam joining metal fitting includes a first joining plate portion that is brought into contact with a web side surface of the steel beam, and two substantially parallel second protrusions protruding substantially vertically from both side edges of the first joining plate portion. A joining plate portion,
The first joining plate portion is fixed to the steel beam by a bolt;
The second joining plate portion is provided so as to protrude from the front end edge of the flange, and an upper portion is opened at a portion protruding from the front end edge, and is previously supported in the horizontal direction through the wooden beam. There is a notch to which the pin or bolt of
The notch has a substantially horizontal bottom side on which the pin or bolt for supporting the anchored construction can be slid to the first joining plate part side,
The pin or bolt can be locked to the joint fitting by lowering the wooden beam from above at a position away from the steel beam from the protruding edge of the flange of the steel beam. In the state, the wooden beam is inserted between upper and lower flanges of the steel beam, and the cutout portion is movable to a position where the end surface of the wooden beam is in contact with or close to the side surface of the web of the steel beam. Formed,
The wooden beam has a through-hole provided in the second joining plate portion at a position where the pin or bolt is locked in the notch and the end surface is in contact with or close to the side surface of the web of the steel beam. A beam joining structure characterized in that the beam joining structure is coupled to the beam joining bracket by a pin or a bolt for fixing a wooden beam penetrating the hole and the wooden beam.

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