JP2004092149A - Beam connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wooden beam connection structure which is simple, smoothly transfers a large force, and minimizes the exposure of a bolt head etc. to the side surface of a beam. <P>SOLUTION: The end face of a second wooden beam 22 is abutted on and connected to the side surface of a first wooden beam 21, and the first wooden beam has a vertical hole 21a formed therein. Then a first screw member 31 having a spiral protrusion is screwed into the hole. The first screw member has screw holes formed therein in a direction perpendicular to an axis thereof, and a beam joint fixture 33 is fixed to the side surface of the first wooden beam with bolts 34 inserted into horizontal holes 21b extending from the side surface of the first wooden beam toward the first screw member. On the other hand, a second screw member 32 is screwed into the edge of the second wooden beam which is then connected to the beam joint fixture with pins 35 penetrating the second wooden beam and the second screw member. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for joining beams in a wooden building, and more particularly to a beam joining structure capable of easily joining a tall beam on site and transmitting a large shear force.
[0002]
[Prior art]
In a joint structure between beams in a wooden building, a notch is provided in a receiving beam, and a beam that is fitted to the notch is provided in a beam to be crossed by a method widely used for a long time. In such a joint structure, since a cutting process is performed on both beams, a cross-sectional defect occurs, and there is a possibility that a structural weak point may occur at a joint portion where a large force is transmitted. In recent years, the use of beams having a large height has been increasing due to the spread of synthetic materials and the like, and when the height of the beams (beams) is large, it is necessary to adopt a structure that matches the strength of the beams themselves. difficult.
[0003]
For this reason, a technique of joining a beam to a beam using a metal object has been proposed. For example, Japanese Patent Application Laid-Open Nos. 8-239913, 10-25810, 2000-199282, and 2000 There is one disclosed in Japanese Patent Application No. -104340.
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned conventional technology, there is a point where the following improvement is desired.
In any of the joining structures described in the above publications, the metal fittings are fixed to the side surfaces of the beams or the pillars with bolts or nails, and the metal materials are joined to other beams to be joined by bolts, nails, pins, or the like. It has become. Therefore, when a large shearing force acts between the beams to be joined, this force is transmitted from the hardware to the wooden part via bolts, nails and the like. In other words, the vertical force is transmitted to the wooden part as a supporting force acting between the horizontal surface of the bolt or nail and the wooden part. In addition, a large bolt is used depending on the vertical force that acts, and the bolt head or the nut is exposed on the side surface of the beam. This is not a problem when the part where the bolt head or nut is exposed on the side surface of the beam is placed in the back of the ceiling, etc., but it cannot be exposed in the living room, which may hinder the use of the indoor space. Occurs.
[0005]
In addition, columns are often joined to the joints between beams, and in particular, a structure in which a bending moment is transmitted between the columns and the beams, that is, the structure of the joints when a ramen structure is used. Becomes complicated. In some cases, the force transmitted between the two beams and between the column and the beam acts locally in a concentrated manner, and a joint structure in which the forces are dispersed and transmitted is desired.
[0006]
The present invention has been made in view of the above circumstances, and an object thereof is to enable a large force to be smoothly transmitted with a simple structure in a joint structure of wooden beams, or In addition, it is to reduce the exposure of the bolt head and the like to the side surface of the beam.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a joint structure of two wooden beams in which an end face of a second wooden beam is brought into contact with a side surface of a first wooden beam and joined. A first screw member having a helical overhang and a lateral screw hole or through-hole on its peripheral surface is screwed into a vertical hole formed in the wooden beam of the first wooden beam. A beam fitting is fixed to a side surface of the first wooden beam by a bolt inserted into a lateral hole extending from the side surface to the first screw member and screwed into the screw hole, or a bolt inserted into the through hole. And a beam joining structure in which the beam joining fitting and the second wooden beam are connected.
[0008]
In the above configuration, the means for connecting the second wooden beam and the beam joining fitting is preferably the means described in claim 2, particularly preferably the means described in claim 3. A structure in which the joining fitting is fixed with nails or screws, a beam receiving part provided in the beam joining fitting, and a second beam connected so as to rest on the beam receiving part can be adopted.
[0009]
In this joining structure, a vertical force acting on the beam joining fitting from the second wooden beam is transmitted to the first screw member via the bolt. The first screw member is screwed into the first wooden beam in the vertical direction, and is engaged with the first wooden beam over the entire length by a protrusion on the peripheral surface. Therefore, a vertical force is transmitted over the entire length, and a large vertical force is smoothly transmitted to the first wooden beam without local concentration of stress. Further, the first screw member is screwed in a vertical direction of the first wooden beam, that is, in a direction perpendicular to the grain, and has a function of preventing the first wooden beam from being cracked along the grain.
[0010]
Further, by fixing the beam joint with a bolt screwed to the first screw member, a bolt head or a nut or the like is exposed on a side surface of the first wooden beam at a portion where the beam joint is attached. And a good appearance can be obtained. Therefore, even if the interior is designed so that this portion appears in the living room, a favorable living room environment can be obtained.
[0011]
The first wooden beam and the second wooden beam generally include wooden members erected in a lateral direction such as an eave girder, a body difference, a large-scale pulling, and the like. The present invention can be particularly effectively applied when the cross-sectional dimensions of these beams are larger than the beam width.
[0012]
The invention according to claim 2 is the beam joining structure according to claim 1, wherein the beam joining fitting comprises: a first joining plate portion abutting on a side surface of the first wooden beam; And a second joining plate portion provided substantially perpendicular to the first joining plate portion, wherein the first joining plate portion is fixed to the first wooden beam by the bolt, and the second joining plate portion Are connected to the second wooden beam by pins or bolts penetrating the second wooden beam in the horizontal direction.
[0013]
In this joining structure, the second wooden beam can be easily fixed to the beam joining fitting after attaching the beam joining fitting to the first wooden beam. Then, a vertical force is transmitted from the second wooden beam to the second joining plate portion of the beam joining fitting via a pin or a bolt.
[0014]
The invention according to claim 3 is the beam joining structure according to claim 2, wherein a second screw member is screwed into an end of the second wooden beam in a vertical direction, It is assumed that the pin or the bolt penetrating the beam is inserted into a horizontal through hole provided in the second screw member.
[0015]
In this joint structure, a second screw member penetrates vertically into an end of the second wooden beam, and a force is transmitted from the second wooden beam to the screw member, and further through a pin or a bolt. It is transmitted to the beam fitting. Therefore, the vertical force is transmitted to the first wooden beam without causing a large stress locally on the second wooden beam. Further, the end of the second wooden beam is reinforced by a second screw member screwed in the vertical direction against cracks and the like.
[0016]
According to a fourth aspect of the present invention, in the beam joining structure according to the second or third aspect, the beam joining fitting includes two second joining portions substantially parallel to both side edges of the first joining plate portion. A plate portion is provided, and two vertical slits are formed at an end portion of the second wooden beam, and the second joining plate portion is inserted and coupled into the slit.
[0017]
In this joining structure, the second joining plate portion of the beam joining fitting is inserted into the slit provided in the second wooden beam, and the first wooden beam and the second wooden beam are joined. Beam joints are invisible from the outside. Therefore, the joint can have a good appearance, and the space can be used so that this portion is exposed in the living room.
[0018]
The invention according to claim 5 is the beam joining structure according to claim 1, wherein the bolt is inserted into a through hole of the first screw member and penetrates the first wooden beam. Thus, beam joining fittings are fixed to both side surfaces of the first wooden beam, and the second wooden beam and the third wooden beam are connected to the beam joining fitting, respectively.
[0019]
In this joining structure, the second wooden beam and the third wooden beam can be joined to both side surfaces of the first wooden beam using the first screw member vertically penetrating into the first wooden beam, It becomes possible to join three beams with a simple structure.
[0020]
The invention according to claim 6 is a joint structure of two beams in which the end surface of the second wooden beam is brought into contact with the end surface of the first wooden beam and joined, and the vertical structure is formed in the first wooden beam. A first screw member having a helical overhang and a lateral screw hole on the peripheral surface is screwed into the hole, and into a lateral hole extending from the end face of the first wooden beam to the first screw member. A beam joint fitting is fixed to an end surface of the first wooden beam by a bolt inserted and screwed into the screw hole, and a beam joining structure in which the beam joint metal and the second wooden beam are connected. To provide.
[0021]
In this joining structure, the end faces of the two wooden beams can be joined by abutting each other, and a vertical force can be transmitted between the two beams with the same structure as the invention according to claim 1.
[0022]
The invention according to claim 7 is the beam joining structure according to claim 6, wherein a second screw member is screwed into an end of the second wooden beam in a vertical direction, A first joining plate portion abutting on an end face of the first wooden beam, and a second joining plate portion provided substantially perpendicular to the first joining plate portion; Is fixed to the end surface of the first wooden beam by the bolt, and the second bonding plate portion is provided on the second screw member while penetrating the second wooden beam in the horizontal direction. It is assumed that the second wooden beam is connected to the second wooden beam by a pin or a bolt inserted through the through hole.
[0023]
In this joint structure, the vertical force is smoothly transmitted between the second wooden beam and the beam connecting fitting, and the ends of both beams are reinforced by two screw members. In addition, a good appearance can be obtained without exposing a large joint fitting on the side surfaces of both beams.
[0024]
The invention according to claim 8 is the beam joint structure according to claim 1 or 6, wherein an upper end surface or a lower end surface of the first screw member is screwed in an axial direction of the first screw member. It is assumed that a hole is provided, and the lower end or the upper end of the wooden pillar arranged in the vertical direction is joined by a pillar fixing bolt screwed into the screw hole.
[0025]
In this joining structure, a wooden beam and a column are joined using a first screw member used for joining two wooden beams. Since the first screw member is screwed into the first wooden beam and is firmly locked to the wooden beam at the overhang of the peripheral surface, the upper end or the lower end of the column is tightly connected to the first wooden beam. Can be. The pillar is not limited to the one joined by only the first screw member, but is joined by both the first screw member and the third screw member screwed into the first wooden beam at a predetermined interval. be able to. At this time, a bending moment can be transmitted by a couple of forces acting on both screw members, and the column and the wooden beam can be joined to form a rigid frame structure. Alternatively, the third screw member may be screwed into the second wooden beam, and the column may be joined so as to straddle the first wooden beam and the second wooden beam.
In addition, the said pillar may contact | abut the upper end surface to the lower surface of a 1st wooden beam or a 2nd wooden beam, and may support a wooden beam, and the lower end surface may contact | abut the upper surface of these beams, It is also possible to use a pillar standing on a beam. In addition, both the pillar supporting the beam and the pillar standing on the beam can be joined using the first screw member.
[0026]
The invention according to claim 9 is the beam joint structure according to claim 3 or 7, wherein an upper end surface or a lower end surface of the second screw member is screwed in an axial direction of the second screw member. It is assumed that a hole is provided, and the lower end or the upper end of the wooden pillar arranged in the vertical direction is joined by a pillar fixing bolt screwed into the screw hole.
[0027]
In this joining structure, a wooden beam and a column are joined using a second screw member used for joining two wooden beams. The second screw member is also screwed into the wooden beam similarly to the first screw member, and is securely locked to the beam, so that the upper end or the lower end of the column can be tied to the second wooden beam. Further, another screw member may be screwed into the second wooden beam, and together with this screw member, the column may be joined so as to transmit a bending moment. Further, in the case where the end faces of the two beams are joined in abutting manner, the columns can be joined so as to straddle both beams.
In addition, the point which can join a pillar to the lower surface or upper surface of a beam, and can also join to both is the same as the invention concerning Claim 8.
[0028]
According to a tenth aspect of the present invention, in the beam joining structure according to the eighth or ninth aspect, the column fixing bolt connects a column fixing bracket fixed to the wooden column to the wooden beam. The pillar fixing bracket includes a first plate portion abutting on the wooden beam, and two second plate portions vertically raised from two opposing sides of the first plate portion. The first plate portion has a bolt hole, and is coupled to the screw member by the column fixing bolt inserted into the bolt hole, and the second plate portion is formed of the wooden column. Are connected to the wooden pillar by a plurality of pins or bolts penetrating horizontally.
[0029]
In this joint structure, a vertical force is transmitted from the screw member to the column fixing bracket via the column fixing bolt. Then, the force is reliably transmitted to the wooden pillar by the pin or the bolt.
[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing a structural skeleton of a wooden building in which a beam joint structure according to the present invention is suitably used.
This structural frame is formed by combining a plurality of ramen frames in which wooden columns 11, 12, 13,... And wooden beams 21, 22,. Each of the wooden pillars and wooden beams constituting the ramen frame structure is a flat member having a large cross-sectional dimension in a direction parallel to a plane including an axis of the ramen frame structure and a small cross-sectional dimension in a direction perpendicular thereto. . 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 ramen frame structures has a so-called beam winning structure in which a beam is brought into contact with and joined to an upper end surface of a column, and a plurality of ramen frame structures are connected to each other by connecting the beam to the beam.
[0031]
FIGS. 2 and 3 are cross-sectional views showing a joint structure of a beam used in the structural body shown in FIG. 1, and showing one embodiment of the invention according to claim 1, claim 2, claim 3, or claim 4. FIG. 2 shows a vertical cross section, and FIG. 3 shows a flat cross section. FIG. 4 is an exploded perspective view of the same joint structure.
In this joining structure, an end face of the second wooden beam 22 is brought into contact with a side surface of the first wooden beam 21 to join them together. The first screw member 31 screwed into the first wooden beam 21 And a second screw member 32 screwed into the second wooden beam 22 via a beam joining bracket 33.
[0032]
As shown in the front view, the side view and the plan view in FIG. 5, the screw members 31 and 32 are provided with a spiral projecting portion 31a on the side surface of a rod-shaped steel member. A screw hole 31b is provided in the axial direction. Further, a through hole 31c is provided at a middle portion in the length direction in a direction perpendicular to the axis, and in the first screw member 31, a female screw is cut into an inner peripheral surface of the through hole. The through hole of the second screw member 32 has a smooth inner peripheral surface so that a pin can be inserted.
[0033]
As shown in FIG. 4, these screw members 31, 32 are provided with vertical through holes 21a, 22a at predetermined positions of the first wooden beam 21 and the second wooden beam 22, respectively, and further have a spiral groove. The upper and lower end faces of the screw members 31 and 32 are adjusted in length so as to be inside the upper and lower surfaces of the wooden beams 21 and 22.
[0034]
As shown in FIG. 4, the beam joining bracket 33 stands in parallel from a first joining plate portion 33a abutting on the side surface of the first wooden beam and two opposing sides of the first joining plate portion 33a. It has two raised second joining plate portions 33b, and the first joining plate portion 33a is provided with a plurality of bolt holes 33c through which bolts 34 are inserted. The second joining plate portion 33b is provided with a plurality of holes 33d through which the pins 35 are inserted. The beam fitting 33 is formed by bending a steel plate, and has a thickness that does not cause excessive deformation during use.
[0035]
The first wooden beam 21 has a lateral hole 21b extending from the side surface to the peripheral surface of the first screw member 31. Then, the beam joint fitting 33 is fixed to the side surface of the first wooden beam 21 by a bolt 34 inserted from the side surface of the first wooden beam 21 into the lateral hole 21b and screwed into the through hole 31c of the first screw member. Have been.
[0036]
On the other hand, the end of the second wooden beam 22 is provided with a notch 22b for accommodating the head of the bolt 34 when abutting on the side surface of the first wooden beam 21. Two slits 22c parallel to both side surfaces of this beam are formed from the notch 22b. The two second joining plate portions 33b of the beam joining bracket 33 are respectively inserted into the slits, and the pins 35 inserted from the side surfaces of the second wooden beams 22 are used for the holes 33d of the second joining plate portion 33b. And is inserted through the through hole 32 c of the second screw member 32.
[0037]
In such a joint structure, the vertical force acting on the second wooden beam 22 is transmitted to the second screw member 32 from the entire peripheral surface of the second screw member 32, and the second screw member 32 is moved horizontally. Is transmitted to the pin 35 penetrating in the direction. Since the pin 35 is inserted into the hole 33d of the second joint plate 33b of the beam joint, a vertical force is transmitted to the beam joint 33, and the bolt 34 from the first joint plate 33a. Through the first screw member 31. The first screw member 31 has a protrusion 31a on its peripheral surface fixed to the first wooden beam 21, and a vertical force is applied to the first wooden beam 21 from the peripheral surface over the entire length of the first screw member 31. Is transmitted.
[0038]
In addition, the bolt heads and nuts are not exposed at all on the side surface of the first wooden beam 21, and the second wooden beam 22 also has only the head portion of the pin 35 exposed on the side surface. It will be invisible at all. Therefore, a good appearance can be obtained, and even if the first wooden beam 21 or the second wooden beam 22 is exposed in the living room, the interior of the living room can be made good.
[0039]
The construction of the joint structure as described above can be performed as follows.
First, the first screw member 31 is screwed into the first wooden beam 21, and the beam joining bracket 33 is fixed to the side surface of the first wooden beam 21 with the bolt 34. On the other hand, in the second wooden beam 22, the second screw member 32 is screwed into the end, and only one pin 35a at the top is penetrated from the side, and inserted into the through hole 32c of the second screw member. deep. Since the uppermost hole provided in the second joint plate portion 33b of the beam joint fitting is open at the upper side as shown in FIG. 4, the second wooden beam 22 is lowered from above to a predetermined position, When the second joining plate portion 33b of the beam joint fitting is inserted into the slit 21b, the uppermost pin 35a penetrating the second wooden beam 22 engages with the uppermost hole of the beam joint fitting 33. Is stopped. In this way, the second wooden beam 22 is temporarily supported in a predetermined position, and thereafter, the remaining wooden beams 22 are firmly inserted by inserting the remaining pins 35 so as to penetrate the second wooden beam 22. Can be joined.
[0040]
FIG. 6 is a schematic perspective view showing a joint structure of a beam according to an embodiment of the present invention.
In this joint structure, the first screw member 51 penetrates the first wooden beam 41 in the vertical direction, and the second wooden beam 42 and the third wooden beam 43 are joined to both side surfaces of this portion. The first screw member 51 has the same configuration as that shown in FIG. 5, and a bolt penetrating the first wooden beam 41 is inserted into a through hole provided in the horizontal direction. Then, beam joining fittings are fixed to both side surfaces of the first wooden beam 41 by the bolts. The same beam joints as those shown in FIG. 4 can be used. The second wooden beam 42 and the third wooden beam 43 are processed in exactly the same manner as the second wooden beam 22 shown in FIGS. 2 to 4, and screw members 52 and 53 penetrate respectively. Then, the pins 55 are joined to the beam joining fittings by penetrating from the side surfaces of the second wooden beam 42 and the third wooden beam 43. In other words, in this joining structure, the two beams 42 and 43 can be joined on both sides using one screw member 51 penetrating the first wooden beam 41, and the joining portion of the three beams can be simplified. It can be structured.
[0041]
FIG. 7 is a schematic perspective view showing a beam joint structure according to an embodiment of the present invention.
In this joining structure, the two wooden beams 61 and 62 are joined so that the axial directions thereof coincide with each other so that both end faces thereof abut with each other. 72 is screwed. The first screw member 71 screwed into the first wooden beam 61 is provided with a screw hole 71 a in the horizontal direction, and is directed from the end surface 61 a of the first wooden beam 61 toward the first screw member 71. A bolt 74 is screwed into the first screw member 71 by passing through the provided horizontal hole 61b, and a beam joint fitting 73 is fixed to the end face. On the other hand, the second wooden beam 62 is exactly the same as the embodiment shown in FIGS. 2 to 4, and is firmly attached to the beam joint fitting 73 fixed to the end surface of the first wooden beam 61 by using a pin 75. Can be fixed.
[0042]
8 and 9 are schematic perspective views showing a beam joint structure according to an embodiment of the present invention.
This joint structure is a portion in which the first wooden beam 21 and the second wooden beam 22 in the embodiment shown in FIGS. 2 to 4 are joined, and the first wooden member 11 is further utilized by using the first screw member 31. Is a structure for joining.
A third screw member 36 is screwed into the first wooden beam 21 in a vertical direction at a predetermined interval from a position where the first screw member 31 is screwed. A screw hole is formed in the lower end surface of these screw members in the axial direction, and the wooden pillar 11 is joined by screwing a bolt 37 into the screw hole. The wooden pillar 11 is wider in the direction along the axis of the first wooden beam 21, and has the same thickness as the first wooden beam 21 and a smaller dimension than the width. At both ends in the width direction (the axial direction of the first wooden beam) of this wooden pillar, as shown in FIG. 9, a notch 11a and a slit 11b connected thereto are provided, and the pillar is fixed to this part. The metal fitting 38 is fixed.
[0043]
As shown in FIG. 9, the column fixing bracket 38 has a first plate portion 38a facing the lower surface of the wooden beam, and two second plate portions rising in parallel from two opposite sides of the first plate portion 38a. And a second plate portion 38b, and a hole 38c through which the bolt 37 is inserted is provided at the center of the first plate portion 38a. It is desirable to use a steel plate having a sufficient thickness for the first plate portion 38a so as not to cause bending deformation. The second plate portion 38b is provided with a plurality of holes 38d through which the pins 39 are inserted. The second plate portion 38b is inserted into the slit 11b of the wooden pillar, and the pin penetrated from the side surface. By inserting 39 into the hole 38d, the column fixing bracket 38 is connected to the wooden column 11.
[0044]
By joining the wooden pillar 11 to the first wooden beam 21 in this manner, the upper end surface of the wooden pillar 11 is directly in contact with the lower surface of the wooden beam 21, and a vertical force is transmitted. When a bending moment acts between the column 11 and the wooden beam 21, a tensile force acts on one of the two screw members 31 and 36, and a compressive force acts on the other. From the surface to the wooden beam 21. Accordingly, a large stress is not locally concentrated on the wooden beam 21, and the bending moment can be transmitted between the wooden column 11 and the first wooden beam 21, thereby forming a rigid frame structure. .
[0045]
FIG. 10 is a schematic perspective view showing a beam joint structure according to an embodiment of the present invention.
This joint structure also joins the wooden pillar 11 ′ at the portion where the first wooden beam 21 and the second wooden beam 22 are joined. In this joint structure, the second wooden beam 22 is This is a structure in which the wooden columns 11 'are joined using the screwed second screw members 32. In this joining structure, the third screw member 36 ′ penetrates the second wooden beam 22 at a predetermined distance from the position where the second screw member 32 is screwed. And the wooden pillar 11 'can be joined exactly like the joining structure shown in FIG. The wooden pillar 11 'thus joined is joined to the second wooden beam 22 so as to be able to transmit a bending moment, and forms a rigid frame structure.
[0046]
As shown in FIG. 11, a first screw member 31 penetrated into the first wooden beam 21 and a third screw member 36 ″ penetrated into the second wooden beam 22 at a predetermined distance from the position of the screw member. Then, the wooden pillar 11 ″ can be joined. In this case, the wooden pillar 11 ″ is joined over the two beams 21 and 22, but the first wooden beam 21 and the second wooden beam 22 are joined so that shear force can be transmitted. The bending moment can be transmitted between the second wooden beam 22 and the second wooden beam 22 to form a rigid frame structure.
[0047]
The joint structures shown in FIGS. 8 to 10 each have a column further joined at a portion where the second wooden beam 22 is joined to the side surface of the first wooden beam 21, as shown in FIG. The pillars can also be joined at the part where the end faces of the two wooden beams 61 and 62 are joined together. At this time, the first screw member 71 penetrating the first wooden beam 61 may be used, or the second screw member 72 penetrating the second wooden beam 62 may be used. May be used.
[0048]
Further, in the above embodiment, the upper ends of the columns are brought into contact with the lower surfaces of the joined beams to support these beams. However, the columns of the upper floors are erected on the joined beams. You can also. In this case, the joining structure between the column and the wooden beam can be turned upside down and joined in exactly the same manner. At this time, the screw member penetrating the wooden beam can be used in common with the one used for joining the pillars that support them below the beam. Thereby, the pillar on the first floor portion and the pillar on the second floor portion are connected via the screw member, and both pillars have rigidity close to that of the through pillar. In addition, the pillars on the upper floor are not limited to those that are erected at the same position as the pillars on the first floor portion as described above. It is also possible to use only one of the screw members in common and to stand up at a slightly shifted position.
[0049]
【The invention's effect】
As described above, in the beam joining structure according to the present invention, the screw member is screwed into the wooden beam in the vertical direction, and is locked to the wooden beam over the entire length of the screw member by the overhang of the peripheral surface. Therefore, a vertical force is transmitted over the entire length, and a large vertical force is smoothly transmitted between both beams without local concentration of stress. Further, the screw member is screwed in a vertical direction of the wooden beam, that is, in a direction perpendicular to the grain, and has a function of preventing the wooden beam from being cracked along the grain.
[0050]
Also, by fixing the beam joint with a bolt screwed to the screw member, a bolt head or a nut or the like is not exposed on the side surface of the wooden beam at a portion where the beam joint is attached, and a good appearance and can do. Therefore, even if the interior is designed so that this portion appears in the living room, a favorable living room environment can be obtained.
Furthermore, the screw member used to join the wooden beams can also be used to join the columns, and it is possible to smoothly transmit the section force between the columns and the beam at the joint between the two beams. It becomes.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a structural skeleton of a wooden building in which a beam joint structure of the present invention is suitably used.
FIG. 2 is an elevational sectional view showing a beam joint structure according to an embodiment of the invention according to claim 1, 2, 3, or 4;
FIG. 3 is a plan sectional view of the joint structure shown in FIG. 2;
FIG. 4 is an exploded perspective view of the joint structure shown in FIGS. 2 and 3;
FIG. 5 is a front view, a side view, and a plan view of a screw member used in the joining structure shown in FIGS. 2 to 4;
FIG. 6 is a schematic perspective view showing one embodiment of the invention according to claim 5;
FIG. 7 is a schematic perspective view showing an embodiment of the invention according to claim 6 or 7;
FIG. 8 is a schematic perspective view showing one embodiment of the invention according to claim 8 or 10;
FIG. 9 is a schematic perspective view showing the structure of a pillar in the joint structure shown in FIG. 8;
FIG. 10 is a schematic perspective view showing an embodiment of the invention according to claim 9 or 10;
FIG. 11 is a schematic perspective view showing another embodiment of the invention according to claim 8 or 10;
[Explanation of symbols]
11 wooden pillar
21,41,61 First wooden beam
22,42,62 Second wooden beam
43 Third wooden beam
31, 51, 71 First screw member
32, 52, 72 Second screw member
33,73 Beam joint fitting
34,74 volts
35, 55, 75 pins
36,53 Third screw member
37 volts
38 pillar fixing bracket
39 pins

Claims (10)

A joint structure of two wooden beams, in which an end surface of a second wooden beam is abutted against and joined to a side surface of the first wooden beam,
A first screw member having a spiral projecting portion and a lateral screw hole or a through hole on the peripheral surface is screwed into a vertical hole formed in the first wooden beam,
A bolt inserted into a lateral hole from the side surface of the first wooden beam to the first screw member and screwed into the screw hole, or a bolt inserted into the through hole, is used to secure the first wooden beam. Beam joints are fixed on the sides,
A beam joining structure, wherein the beam joining fitting is connected to a second wooden beam. The beam joining fitting has a first joining plate portion abutting on a side surface of the first wooden beam, and a second joining plate portion provided substantially perpendicular to the first joining plate portion. And
The first joining plate portion is fixed to the first wooden beam by the bolt,
2. The beam of claim 1, wherein the second joining plate is coupled to the second wooden beam by a pin or bolt extending horizontally through the second wooden beam. Joint structure. A second screw member is screwed vertically into an end of the second wooden beam,
The beam joining structure according to claim 2, wherein the pin or the bolt penetrating the second wooden beam is inserted into a horizontal through hole provided in the second screw member. . The beam joint fitting is provided with two second joint plate portions substantially in parallel from both side edges of the first joint plate portion,
The two vertical slits are formed at the end of the second wooden beam, and the second joining plate portion is inserted into and connected to the slit. Item 4. A beam joint structure according to Item 3. The bolt is inserted through the through hole of the first screw member, and penetrates the first wooden beam,
A beam joint is fixed to each side surface of the first wooden beam by the bolt, and a second wooden beam and a third wooden beam are connected to the beam joint, respectively. The beam joining structure according to claim 1, wherein A joint structure of two beams in which an end surface of a second wooden beam is abutted against and joined to an end surface of a first wooden beam,
A first screw member having a helical bulge and a lateral screw hole on the peripheral surface is screwed into a vertical hole formed in the first wooden beam,
A beam joint fitting is fixed to an end surface of the first wooden beam by a bolt inserted into a lateral hole from the end surface of the first wooden beam to the first screw member and screwed into the screw hole,
A beam joining structure, wherein the beam joining fitting is connected to a second wooden beam. A second screw member is screwed vertically into an end of the second wooden beam,
The beam joining fitting has a first joining plate portion abutting on an end face of the first wooden beam, and a second joining plate portion provided substantially perpendicular to the first joining plate portion. And
The first joining plate portion is fixed to an end face of the first wooden beam by the bolt,
The second joining plate portion horizontally penetrates through the second wooden beam, and the pin or bolt inserted into a through hole provided in the second screw member allows the second wooden beam to be used. The beam joining structure according to claim 6, wherein the beam is joined to the beam. An upper end surface or a lower end surface of the first screw member is provided with a screw hole in an axial direction of the first screw member,
The beam according to claim 1 or 6, wherein the beam is joined to a lower end or an upper end of a vertically arranged wooden column by a column fixing bolt screwed into the screw hole. Joint structure. On the upper end surface or the lower end surface of the second screw member, a screw hole is provided in the axial direction of the second screw member,
The beam according to claim 3, wherein the lower end or the upper end of the vertically disposed wooden pillar is joined by a pillar fixing bolt screwed into the screw hole. Joint structure. The column fixing bolt is for coupling a column fixing bracket fixed to the wooden column to the wooden beam,
The column fixing bracket has a first plate portion abutting on the wooden beam, and two second plate portions vertically raised from two opposing sides of the first plate portion. ,
The first plate portion has a bolt hole, and is coupled to the screw member by the pillar fixing bolt inserted into the bolt hole,
The beam joint according to claim 8 or 9, wherein the second plate portion is connected to the wooden pillar by a plurality of pins or bolts that penetrate the wooden pillar in a horizontal direction. Construction.

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