JP6190739B2 - Joint structure of wooden beams - Google Patents

Description

  The present invention relates to a beam connecting structure in a wooden building or the like, and more particularly to a wooden beam connecting structure having an I-shaped cross section composed of upper and lower flanges and a web.

  As a structure for joining an end of a beam made of wood with another beam or a column, for example, there is one described in Patent Document 1. In this joining structure, a beam receiver is fixed to another beam or a column to which the beam is joined, and the end of the beam to be joined is supported by this beam receiver. The beam receiver includes a vertical plate portion protruding toward a beam to be joined. Then, the vertical plate portion of the beam receiver is inserted into the slit provided in the beam to be joined, and a pin or a bolt is inserted from the side surface of the beam into the through hole provided in the beam and the vertical plate portion. The beam is joined to another beam or column.

  On the other hand, a joint structure using a beam receiver 101 as shown in FIG. 13 is also widely known. The beam receiver 101 has two vertical plate portions 101a and 101b that are in contact with the side surfaces of the beam 102 to be joined, and a horizontal plate portion 101c that is in contact with the bottom surface of the beam 102, and is attached to the attachment portion 101d. It is provided to take out. The beam receiver 101 is fixed to another beam 103 or a column, and the beam 102 to be joined to the beam 103 or the column is dropped between the two vertical plate portions 101a and 101b from above, and the horizontal It is supported on the plate part 101c.

JP 2011-184851 A

In the joint structure described in Patent Document 1, if the beam to be joined has an I-shaped cross section, the beam receiving metal object is passed from a thin web through a small number of pins or bolts penetrating the web. A large shearing force is transmitted to. Therefore, a large force (supporting pressure) acts on the thin web at the portion in contact with the pin or bolt, and there is a possibility that the web is deformed.
On the other hand, in the joint structure using the beam receiver 101 as shown in FIG. 13, even if the beam 102 to be joined has an I-shaped cross section, it can be supported in the same manner as the rectangular cross section beam. Will be exposed along the side and bottom surfaces of the beam 102, which may impair the appearance. Further, a large compressive force acts on the web in the vicinity of the support end of the beam 102, and in order to prevent excessive deformation and buckling, reinforcement such as providing a crosspiece or the like along the web is necessary.

  The present invention has been made in view of the circumstances as described above, and an object of the present invention is to join an end of a wooden beam having an I-shaped cross section to another structural member, and to apply a shear force from a web having an I-shaped cross section. It is providing the joining structure of the wooden beam which can be transmitted with respect to another structure.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a wood beam joining structure in which a wood beam having an upper flange, a lower flange, and a web for connecting them vertically is joined to another structural member. An additional plate made of steel is fixed to both side surfaces of the web, the additional plate is joined to the other structural member, and one of the additional plates fixed to both sides of the web is A screw having a plurality of through-holes and having a drilling function and a tapping function is screwed into the other of the web and the additional plate through the through-hole, and both the additional plates penetrate the web through the through-hole. Provided is a joining structure of wooden beams fixed so as to be sandwiched.

In this joining structure, a screw having a drilling function and a tapping function can be inserted from a through hole provided in one of the attached plates, and the other of the wooden material and the attached plate can be passed through and fixed. it can. In other words, the web and the other attachment plate do not require processing such as providing a screw hole or the like in advance at a position corresponding to the through hole provided in one attachment plate, and are attached using a plurality of screws. The mounting plate can be easily fixed to the web.
In a beam having an I-shaped cross section, the shearing force mainly acts on the web, and when the end portion is supported via the attachment plate, a large shearing force is generated between the web and the attachment plate fixed thereto. . On the other hand, in the joining structure of the present invention, the number of screws is determined according to the shearing force generated at the joining end of the beam, the dimension of the beam, etc., and the number of screws is within the range where the attached plate is in contact with the web. It is possible to easily fix the attachment plate by screwing it so as to be distributed. Therefore, it is possible to suppress the deformation of the web due to a large force (supporting pressure) acting locally on the web formed of a thin wood material by being distributed to a large number of screws and transmitting a shearing force. .

  The invention according to claim 2 is the wood beam joint structure according to claim 1, wherein the attachment plate includes a protruding portion in a horizontal direction along an upper edge and a lower edge, and the protruding portion is the upper flange. And the lower flange.

  In this joining structure, the overhang portions provided along the upper and lower edges of the attachment plate are brought into contact with the upper flange and the lower flange, and the attachment plate is relatively displaced in the direction along the side surface of the web. Is suppressed. As a result, it is possible to reduce the load on the screw that fixes the attachment plate to the web and to reduce the occurrence of a large difference in the load acting on the plurality of screws.

  The invention according to claim 3 is the wood beam joint structure according to claim 1 or 2, wherein the web is configured to incline a plate material having a predetermined width in the axial direction of the wooden beam, and the axial direction of the wooden beam. A first group of plate members arranged in a plurality at a predetermined interval, and a plate member having the same width as the first group of plate members are inclined in a direction opposite to the first group of plate members, and are arranged in the axial direction of the wooden beam. A plurality of plate members arranged in a plurality at a predetermined interval are joined together so as to overlap each other, and the screws are included in the plate member included in the first group and the second group. It is assumed that the plate material to be penetrated through both the attachment plate and the web at a portion where the plate materials are overlapped with each other.

If the webs are laminated and laminated with plate members inclined in opposite directions, when the length of such beams is adjusted, the position where the plate materials inclined in the opposite direction overlap is the position of the end face of the beam. Vary with respect to position. In the above-mentioned joining structure, even if the position where the two plate materials overlap as described above, the screw can be inserted by selecting the position where the plate material overlaps from the through holes formed in the attached plate. Both attachment plates attached to both sides of the web can be fastened and firmly fixed to the web.
Note that it is not necessary to screw all the screws to be tightened into a position where the plate materials are overlapped, but it is desirable that many screws are screwed into the positions where the plate materials are overlapped, and other screws are also screwed close to the overlapping positions.

  The invention according to claim 4 is the wood beam joining structure according to any one of claims 1 to 3, wherein the attachment plate is more than the edge of the side to be joined with the other structural member. It is assumed that a vertical rib is provided on the center side of the wooden beam so as to be bent by a vertical fold line and project to the side of the web.

  In this joining structure, the vertical ribs projecting to the side of the web can increase the bending rigidity of the attachment plate in the region where the attachment plate is in contact with the web and joined. Is suppressed. Further, by joining the attachment plate to the web, bending deformation at the end portion of the web made of a thin wood material can be reduced.

  According to a fifth aspect of the present invention, in the wood beam joint structure according to any one of the first to fourth aspects, the attachment plate projects in an axial direction of the wood beam from an edge of the web. And the overhanging portion is bent in the direction along the side surface of the beam to be joined having the upper and lower flanges and the web made of the wood material which are the other structural members, and the bent portion of the additional plate is also bent A through hole is provided, and a bent portion of the attachment plate is brought into contact with a side surface of the web made of a wood material of the joined beam, and a steel plate material is brought into contact with the back side of the web of the joined beam, and drilling is performed. It is assumed that a screw having a function and a tapping function is screwed into the web of the beam to be joined and the steel plate material from the through hole, and the attachment plate is fixed to the beam to be joined.

  In this joint structure, when the other structural member to which the beam is joined is also a beam made of I-type wood material, the joint is made so that shear force is transmitted from the web of the wood beam to the web of the other wood beam. be able to.

  As explained above, the end of a wooden beam having an I-shaped cross section is supported by a web on which a large shearing force acts and joined to another structural member, and the shearing force is applied from the web of the I-shaped cross section It is possible to transmit effectively to the structural member.

It is a disassembled perspective view which shows the joining structure of the wooden beam which is one Embodiment of this invention. It is the schematic side view of the joining structure of the wooden beam shown in FIG. 1, a top view, and sectional drawing of a beam. It is a side view of the attachment board which can be used with the joining structure of the wooden beam shown in FIG. It is a side view which shows an example of the screw which has a drilling function and a tapping function, and a schematic sectional drawing which shows the state which fixed the attachment board shown in FIG. 3 to the web of a wooden beam using this screw. It is a plane sectional view of the joining structure of the wooden beam shown in FIG. It is a schematic perspective view which shows the state which attached the other example of the attachment board, and this attachment board to the wooden beam of I type cross section. It is a schematic perspective view which shows the other example of an attachment board. It is a plane sectional view which shows the joining structure of the wooden beam which is other embodiment of this invention. It is the side view and plane sectional view which show the joining structure of the wooden beam which is other embodiment of this invention. It is the side view and plane sectional view which show the joining structure of the wooden beam which is other embodiment of this invention. It is a schematic perspective view which shows the joining structure of the wooden beam which is other embodiment of this invention. It is a schematic perspective view which shows the joining structure of the wooden beam which is other embodiment of this invention. It is a schematic perspective view which shows the joining structure of the conventional wooden beam.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing a joining structure of wood beams according to an embodiment of the present invention. FIG. 2 is a side view, a plan view, and a cross-sectional view of the beam of this joint structure.
This wood beam joint structure includes upper and lower flanges 11 and 12 made of wood and a wood web 13 that connects the upper and lower flanges to each other, and the beam 1 having a substantially I-shaped section and a rectangle that is another structural member. The cross-section beam 2 is joined. The I-shaped cross-section beam 1 is joined with its end face opposed to the side surface of the rectangular cross-section beam 2 made of wood. The beams 1 and 2 are joined by fixing the beam receiving metal fitting 4 to the side surface of the beam 2 having a rectangular cross section, and the end portions of the beam 1 having an I-shaped cross section on the side plates of the web 13. 3b (the attachment plate 3b is not shown) is fixed, and the attachment plates 3a and 3b are joined to the beam receiving bracket 4.

  For the upper and lower flanges 11 and 12 provided in the beam 1 having the I-shaped cross section, a laminated material (LVL: Laminated Veneer Lumber) formed by bonding solid wood or a plurality of thin plates of wood can be used. . The laminated material is obtained by laminating wood pieces having a predetermined thickness, for example, 2 mm to 4 mm, with the grain directions of the single plates being substantially parallel and adhering to each other. Further, the web 13 is formed by a plurality of narrow plate members 14 arranged along a vertical plane in the axial direction of the beam 1, and the upper flange 11 and the lower flange 12 are vertically moved so as to behave integrally. To be linked. The narrow plate member 14 is formed by forming wood into a plate shape having a predetermined width. The surface having the predetermined width is made parallel to the vertical surface, and the axis of the narrow plate member 14 is parallel to the axis of the beam 1 in a side view. Are inclined at an angle of approximately 45 °. These narrow plate members 14 include a first group of narrow plate members 14a and a second group of narrow plate members 14b in which the inclination directions of the axes are opposite to each other, and are spaced apart from each other by a predetermined distance in the axial direction of the beam 1. It is arranged. These are superposed and pasted together. The overlapped narrow plate members 14a and 14b may be bonded together using nails, bolts, pins, or the like, in addition to those bonded to each other by an adhesive.

  The narrow plate member 14 is formed so that the grain direction substantially coincides with the axial direction of the narrow plate member, and preferably has a width of about 30 mm to 80 mm and a thickness of about 5 mm to 15 mm. In the axial direction of the beam 1, the central axis lines of the narrow plate members 14 are arranged at intervals of about 60 mm to 250 mm.

  The narrow plate member 14 is formed by bonding the first group of narrow plate members 14a and the second group of narrow plate members 14b together to form a panel, and then joining the upper flange 11 and the lower flange 12 together. In the joining, an axial groove is formed on the lower surface of the upper flange 11 and the upper surface of the lower flange 12, and the upper end or lower end of the panel-shaped narrow plate member 14 is pushed into the groove and fixed by an adhesive or the like. It is. In addition, as another example of the joining structure of the narrow plate material and the upper and lower flanges, it is assumed that the wood constituting the upper flange and the lower flange is divided into two parts and arranged in parallel in the axial direction, each of which is a panel shape You may join so that the upper end part and lower end part of the narrow board | plate material group which became may be inserted | pinched.

  The beam receiving metal 4 is formed of a steel plate, and as shown in FIGS. 1 and 5, a base portion 4a fixed in contact with a side surface of the beam 2 having a rectangular cross section, and a vertical direction of the base portion 4a And a vertical plate portion 4b which is bent in a substantially right angle direction from the side edge of the beam 1 and protrudes in the axial direction of the beam 1. The base portion 4a is provided with a plurality of holes through which the bolts 5 are inserted, and the beam receiving metal fitting 4 is fixed to the beam 2 having the rectangular cross section by the bolts 5 inserted through these holes and penetrating the beam 2 having the rectangular cross section. Is done. The vertical plate portion 4b is provided with a plurality of bolt holes 4c, and is joined to the attachment plate 3 by bolts 6 and nuts 7 inserted into the bolt holes 4c.

The attachment plates 3a and 3b attached to both sides of the web 13 are both formed of a rectangular steel plate material, and one of these attachment plates 3a has a plurality of through holes 31 as shown in FIG. Are arranged so as to be distributed on the plate surface. In addition, a bolt hole 32 through which the bolt 6 is inserted is provided in the vicinity of the edge joined to the beam receiving metal fitting 4. Further, the other 3b of the attachment plate is a flat steel plate material in which a through hole or the like is not provided in a region to be brought into contact with the web 13, and a bolt 6 is inserted in the vicinity of an edge joined to the beam receiving metal fitting 4. Bolt holes are provided. These attachment plates 3a and 3b are in contact with the web 13 in the range from the vicinity of the lower surface of the upper flange 11 to the upper surface of the lower flange 12 in the vicinity of the end portion of the beam 1 having the I-shaped cross section to be joined. Fixed.
The attachment plates 3a and 3b are preferably processed and used from a steel plate having a thickness of about 0.5 mm to 1.5 mm.

In order to fix the attachment plates 3a and 3b to the web 13 made of a wood material, a screw (hereinafter referred to as a drilling tapping screw) 30 having a drilling function and a tapping function as shown in FIG. 4 is used.
FIG. 4A is a side view showing an example of a drilling tapping screw.
The drilling tapping screw 30 has a cutting blade 30a at the tip, and has a drilling function. In other words, wood and metal can be cut and penetrated or penetrated, and if the steel plate material has a thickness of about 1.5 mm or less, a through hole can be formed. A male screw 30c is formed in a predetermined range from the screw head 30b, and the tip side of the male screw portion has a tapping function. That is, the internal thread can be cut on the inner peripheral surface of the through hole formed in the steel plate by the cutting blade 30a.

Using the drilling tapping screw 30 as described above, the attachment plates 3a and 3b can be fixed to the web 13 made of a wood material as follows.
The attachment plates 3 a and 3 b are brought into contact with both sides of the web, and a drilling tapping screw 30 is inserted from a through hole 31 provided in one of the attachment plates 3 a and rotated to penetrate into the web 13 made of the narrow plate material 14. Then, it abuts against the other attachment plate 3b in contact with the opposite side of the web 13, and further rotates to penetrate the other attachment plate 3b. The drilling tapping screw 30 is not provided with a thread in the vicinity of the tip, and when the cutting blade 30a at the tip is abutted against the other attachment plate 3b, the male screw 30c is screwed into the web 13 made of a wood material. Not. Therefore, when the cutting blade 30a at the front end is abutted against the other attachment plate 3b and rotated, the propulsive force does not act on the drilling tapping screw 30 from the web 13, and the other attachment plate 3b is applied to the web 13. The drilling tapping screw 30 can be rotated in the pressed state. And after a front-end | tip part penetrates the other attachment board 3b, the part in which the male screw 30c was formed is screwed in the web 13, and also screwed in while cutting a female screw in the through-hole formed in the other attachment board 3b. It is. As shown in FIG. 4B, the drilling tapping screw 30 having the tapping function is screwed in and penetrated until the head 30b is locked to the one additional plate 3a. 3a and 3b are fixed so as to sandwich the web 13 made of a wood material from both sides.

  The number of drilling tapping screws 30 to be screwed in as described above is determined in accordance with the value of the shearing force acting on the beam 1 to be joined and the like, and is in a range in which the webs 13 of the attachment plates 3a and 3b are in contact with each other. Screwed to distribute. As shown in FIG. 2A, the screwing position is preferably a position where the narrow plate member included in the first group and the narrow plate member included in the second group that are inclined in opposite directions are overlapped. When all of the necessary number of drilling tapping screws cannot be screwed in at the position where the narrow plate material included in the first group and the narrow plate material included in the second group are overlapped, close to the position where both are overlapped It may be screwed so as to penetrate one narrow plate material.

As shown in FIG. 5, the attachment plates 3a and 3b are fixed so that the vicinity of the edge provided with the bolt hole 32 protrudes from the end surface of the beam 1 having an I-shaped cross section, and the protruding portion is a beam having a rectangular cross section. 2 is joined to a beam receiving fixture 4 fixed to 2. The protruding portions of the attachment plates 3a and 3b are overlapped with the vertical plate portion 4b of the beam receiving bracket 4 fixed to the beam 2 having a rectangular cross section, and the bolt holes 4c provided in the vertical plate portion 4b and the attachment plate The bolt 6 inserted through the bolt hole 32 and the nut 7 screwed into the bolt 6 are joined. As a result, the shearing force acting on the beam 1 having the I-shaped cross section is transmitted to the beam 2 having the rectangular cross section via the attachment plates 3a and 3b, the bolt 6 and the beam receiving bracket 4.
It is desirable to insert a short steel cylindrical member 8 through which the bolt 6 is inserted between the two vertical plate portions of the beam receiving metal fitting 4. Thereby, the two attachment plates 3a and 3b and the two vertical plate portions 4b can be fastened by the bolt 6, and the attachment plates 3a and 3b and the beam receiving metal fitting 4 can be firmly fixed.

FIG. 6 is a schematic diagram showing another example of an attachment plate that can be used in place of the attachment plate 3 shown in FIG. 3 when the beam 1 made of a wood material having an I-shaped cross section is joined to another structural member. It is a schematic perspective view which shows the state which attached the perspective view and this attachment board 40 to the beam 1 of an I-shaped cross section.
The attachment plate 40 is formed of a steel plate material as in the attachment plate 3 shown in FIG. 3, and a plurality of through holes 41 are provided on the plate surface in contact with the web 13 of the beam 1 having an I-shaped cross section. Yes. Further, a bolt hole 42 is formed in the vicinity of an edge joined to a beam receiving bracket (not shown) fixed to another structural member.
As shown in FIG. 6 (a), a beam having an I-shaped cross section is continuously formed on the upper and lower edges of the portion of the attachment plate 40 that is in contact with the web 13, as shown in FIG. 1 is provided with an overhanging portion 43 that is bent substantially horizontally to the side of the first portion. As shown in FIG. 6 (b), these overhanging portions 43 come into contact with the lower surface of the upper flange 11 and the upper surface of the lower flange 12 when attached to the beam 1 having an I-shaped cross section, and are It is fixed to the flange 11 and the lower flange 12.

  On the other hand, the other attachment plate (not shown) is brought into contact with the surface on the back side of the surface of the web 13 with which the attachment plate is in contact. This back side attachment plate is formed by bending a steel plate material into the same shape as the attachment plate shown in FIG. 6, has overhang portions on top and bottom, and is provided with bolt holes for joining to the beam receiving metal fitting 4. However, the through-hole is not provided in the surface that comes into contact with the web 13, and is a flat surface.

  Such an attachment plate 40 and the attachment plate on the back side are brought into contact with both sides of the web, and the web 13 of the beam 1 having the I-shaped cross section is used by using a drilling tapping screw 30 in the same manner as the attachment plate 3 shown in FIG. Can be fixed to. Then, the protruding portion 43 between the attachment plate 40 and the attachment plate on the back side is fixed to the upper flange 11 and the lower flange 12, so that the attachment plate 40 and the attachment plate on the back side are firmly attached to the beam 1. Fixed. When the attachment plate 40 and the attachment plate on the back side are fixed in this manner, when a large shearing force acts between the web 13 and the extension portion 43 and the upper and lower flanges 11 and 12, The transmission of force in the vertical direction occurs. Therefore, a part of the shearing force acting on the attachment plate 40 and the attachment plate on the back side from the beam 1 having the I-shaped cross section is transmitted through both the flanges 11 and 12, and the load on the drilling tapping screw 30 penetrating the web. Is reduced. Further, it is restrained that the attachment plate 40 and the attachment plate on the back side are displaced in the vertical direction with respect to the beam 1 having the I-shaped cross section, and the displacement that rotates along the side surface of the web 13 is also restricted. Accordingly, it is possible to suppress the occurrence of a large difference in the force acting on each of the drilling tapping screws 30 that are distributed and penetrated.

  The attachment plate 40 shown in FIG. 6 fixes an overhanging portion 41 projecting substantially horizontally from the upper edge and the lower edge of the portion in contact with the web 13 to the upper flange 11 and the lower flange 12 with screws. Other means may be used to fix the overhanging portion to the upper and lower flanges. For example, a claw-like portion that can penetrate the upper and lower flanges is provided in the upper and lower overhanging portions 41, and the overhanging portion is supported by supporting the attachment plate at a predetermined position and penetrating the claw-like portions into the upper and lower flanges. May be fixed.

The attachment plates 60 and 64 shown in FIG. 7 are provided with vertical ribs 62, 63, and 66 that increase rigidity against bending in the vertical direction. As in the case of the attachment plate 3 shown in FIG. 3, the attachment plates 60 and 64 are provided with through holes 61 and 65 on the surface of the beam 1 made of a wood material made of an I-shaped cross section. Yes. Then, the attachment plates 60 and 64 and the attachment plate which is in contact with the back side of the web 13 and is not formed with a through hole are fastened with a drilling tapping screw 30 and fixed to the web 13.
In the attachment plate 60 shown in FIG. 7 (a), a substantially vertical fold line is provided near the front end and the rear end to be joined to other structural members, and the steel plate material constituting the attachment plate 60 is set laterally. The vertical ribs 62 and 63 are bent. As a result, the bending rigidity in the vertical direction of the attachment plate 60 increases near the front end and the rear end, and the web 13 having a small thickness when attached to the web 13 of the beam 1 having the I-shaped section is bent in the vertical direction. Can be strengthened against. Therefore, it is possible to suppress the deformation of the cross section near the end of the beam due to a large shearing force, torsional moment, horizontal force, and the like.
Note that one of the vertical ribs 62 and 63 near the front end and the rear end may be provided.

  The attachment plate 64 shown in FIG. 7B is provided with a vertical rib 66 in an intermediate portion of a steel plate material continuous from the front end to the rear end. These vertical ribs 66 are bent sideways so that the steel plate material is bent along a vertical fold line, and the cross-sectional shape is U-shaped, V-shaped, and I-shaped or rectangular steel plates are overlapped. Is. And the through-hole 65 is provided in both the front end side and back side of the vertical rib 66, and both are fixed to a web. By providing such a vertical rib 66, an attachment plate having a large bending rigidity between the front end and the rear end of the attachment plate 64 is obtained.

FIG. 8 is a schematic plan view showing another embodiment of the joint structure of wooden beams according to the present invention.
In this joining structure, the protruding portion from the end surface of the beam 1 of the attachment plate 70a and the attachment plate 70b that is in contact with the back side of the web 13 is bent toward the center line side of the beam 1 in plan view. The distal end portion 70c joined to the metal fitting 71 is processed so as to be substantially parallel to the center line. On the other hand, the beam receiving metal 71 has a base 71a fixed to a side surface of a beam 2 having a rectangular cross section, which is another structure, by a plurality of screws 72, and protrudes in the axial direction of the beam 1 having an I-shaped cross section. Two vertical plate portions 71b are provided. And the front-end | tip part 70c of the attachment board 70 is piled up on both sides of the vertical board part 71a of the said beam receiving metal fitting, and is being fastened and fixed with the volt | bolt 73 and the nut 74.

FIG. 9 is a schematic side view and a plan sectional view showing another embodiment of the joining structure of wooden beams according to the present invention. In this joining structure, end faces of the upper and lower flanges 11 and 12 of the beam 1 made of a wooden material. Are in contact with and joined to the side surface of the beam 2 having a rectangular cross section, which is another structural member.
The attachment plate 80 is the same as that used in the joining structure shown in FIGS. 1 and 2, and the attachment plate 80a having a through hole and the attachment plate 80b having no through hole are provided. Are fixed to both surfaces of the web 13 by tapping screws 30. At this time, the front end 80c of the attachment plates 80a and 80b on the side to be joined to the beam having the rectangular cross section is a position retracted from the front end surface of the beam 1 having the I-shaped cross section. Further, the front end portion of the web 13 is notched so as to recede from the end surfaces of the upper and lower flanges 11 and 12 so as not to interfere with the beam receiving bracket 81 fixed to the beam 2 having a rectangular cross section and the bolt 82 fixing the same. It is. The beam receiving member 81 has a base portion 81a fixed to the side surface of the beam 2 having a rectangular cross section and a vertical plate portion 81b protruding from both side edges of the base portion, and an additional plate between the two vertical plate portions 81b. The web 13 to which 80 is attached is sandwiched, and is fastened and fixed by bolts 83 and nuts 84 inserted into through holes provided in the attachment plate 80 and the web 13.
In such a joining structure, the vicinity of the tip of the attachment plate 80 can be brought into contact with the web 13 and the overlapped portion can be joined to the beam receiving member 81. Therefore, a structure in which horizontal displacement is difficult to occur is obtained.

FIG. 10 is a schematic side view and a plan sectional view showing another embodiment of the joint structure of wooden beams according to the present invention. In this joint structure, a groove-like cut in the vertical direction is formed on the side face of the beam 2 having a rectangular section. A notch 2a is formed, and the beam 1 having an I-shaped cross section is joined with the upper and lower flanges 11 and 12 being inserted into the notch.
The side surfaces at the tip of the upper and lower flanges 11 and 12 are in contact with the inner surface of the notch 2a provided in the beam 2 having a rectangular cross section. Displacement in a direction perpendicular to the axis of the beam 1 and horizontal is constrained by the beam 2 having a rectangular cross section. Moreover, the front end surfaces of the upper and lower flanges 11 and 12 may be abutted against the beam 2 having a rectangular cross section in the groove-shaped notch 2a, or may be joined at intervals. The attachment plate 80 is attached in the same manner as the joining structure shown in FIG. 13, and the beam receiving member 81 is similarly joined to the bottom of the notch 2a using the same member.
In such a joint structure, the upper and lower flanges 11 and 12 of the I-shaped cross-section beam 1 are restrained from being displaced laterally by the rectangular-shaped cross-section beam 2, so that the end of the I-shaped cross-section beam 1 is rectangular. It is possible to suppress the occurrence of a displacement in the rotational direction such as a horizontal displacement or twist with respect to the cross-sectional beam 2.

FIG. 11: is a schematic perspective view which shows the joining structure of the wooden beam which is other embodiment of this invention.
In this joining structure, the I-shaped cross-section beam 1 is joined to the side surface of the rectangular cross-section beam 2 by using the attachment plate 90.
Similar to the attachment plate 3 shown in FIG. 3, the attachment plate 90 is provided with a plurality of through holes in a portion that comes into contact with the web 13 of the beam 1 having an I-shaped cross section. Further, both attachment plates are fastened by a drilling tapping screw passed through an attachment plate (not shown) on the back side and fixed to the web 13 made of a wood material. A portion of the attachment plate 90 joined to the rectangular cross-section beam 2 is bent at a substantially right angle by a vertical fold line, and the bent portion 90a connects the upper and lower flanges 11 and 12 to the rectangular cross-section beam 2. When it abuts against the side surface, it comes into contact with the side surface of the beam 2 having a rectangular cross section. Then, screws are screwed into the rectangular cross-section beam 2 from the plurality of screw holes provided in the bent portion 90a, and the attachment plate 90 is joined to the rectangular cross-section beam 2. In addition, you may provide a bolt hole in the bent part 90a of the attachment board 90, and may fix it with the volt | bolt and nut which penetrate the beam 2 of a rectangular cross section to a horizontal direction.

FIG. 12 is a schematic perspective view showing a joining structure of wood beams according to another embodiment of the present invention, in which the end of the first beam 9 of the I-shaped section made of a wood material is connected to another I-shaped section. It joins so that it may abut against the side part of the 2nd beam 10 which is a beam.
The attachment plate 91 used in this joining structure is bent at a substantially right angle by a vertical fold line 91c at an intermediate portion in the horizontal direction, and both sides of the fold line 91c are I-shaped cross-section beams 9, 10 respectively. It becomes two attachment parts 91a and 91b fixed to the. A plurality of through holes are arranged in each of the attachment portions 91a and 91b. One attachment portion 91a divided by the bending line 91c is in contact with the web 9c at the end of the first beam 9, and is drilled tapping screw 30 that penetrates the web 9c and the back side attachment plate from the through hole. Thus, the attachment plate 91 and the attachment plate (not shown) on the back side are fastened and fixed. At this time, the bending line 91c is in a position protruding in the axial direction from the end face of the first beam 9. The protruding portion is inserted between the upper flange 10a and the lower flange 10b of the second beam 10, and the upper and lower flanges 9a, 9b of the first beam 9 are connected to the side surfaces of the upper and lower flanges 10a, 10b of the second beam 10. The other attachment portion 91b divided by the folding line of the attachment plate 91 is brought into contact with the web 10c of the second beam 10 when it is abutted against the web 10. Then, both attachments are made by a drilling tapping screw that is penetrated from the through-hole formed in the abutting attachment portion 91b to the web 10c of the second beam and the attachment plate in contact with the back side of the web. The plate is fastened and fixed to the web 10c. With the attachment plate 91 fixed in this manner, the end of the first beam 9 having the I-shaped cross section is brought into contact with the side surface of the beam 10 having the other I-shaped cross section so that the shearing force can be transmitted. The end of the first beam 9 can be supported by the second beam 10.

The present invention is not limited to the embodiment described above, and within the scope of the present invention, the shape and dimensions of the beam, the shape and dimensions of the attachment plate, the diameter of the tapping screw, etc. are appropriately set. It can be changed and implemented.
For example, the web of the beam is formed by arranging a plurality of slanted narrow plate materials at intervals in the above embodiment, but a plywood or a solid plate material continuous in the axial direction of the beam may be used.
The other structural members to which the ends of the beams having the I-shaped cross section are joined are beams made of a wood material in the above embodiment, but are not limited to the beams but are pillars, walls, and the like. May be. The other structural members are not limited to those made of a wood material, and may be steel members or concrete members. Furthermore, the structure in which the attachment plate is joined to another structural member is not limited to a structure using a beam receiving bracket or a structure using screws or bolts, and can be designed appropriately.

1: Beam of I-shaped section made of wood material, 2: Beam of rectangular section made of wood material, 3: Attached plate, 3a: Attached plate with through-holes, 3b: No through-holes Attached plate, 4: Beam support bracket, 4a: Base, 4b: Vertical plate, 4c: Bolt hole, 5: Bolt, 6: Bolt, 7: Nut, 8: Steel cylindrical member, 9: I-shaped cross section 1 beam, 10: second beam of I-shaped cross section,
11: Upper flange, 12: Lower flange, 13: Web, 14: Narrow plate material,
30: Screw having a drilling function and a tapping function (drilling tapping screw),
40: Additional plate, 41: Through hole, 42: Bolt hole, 43: Overhang, 44: Screw,
60: Additional plate, 61: Through hole, 62, 63: Vertical rib, 64: Additional plate, 65: Through hole, 66: Vertical rib,
70: Additional plate, 70a: Additional plate provided with a through hole, 70b: Additional plate not provided with a through hole, 71: Beam receiving bracket, 71a: Base of beam receiving bracket, 71b: Beam receiving bracket Vertical plate, 72: screw, 73: bolt, 74: nut,
80: additional plate, 80a: additional plate provided with a through hole, 80b: additional plate not provided with a through hole, 81: beam receiving bracket, 81a: base of beam receiving bracket, 81b: beam receiving bracket Vertical plate part, 82: bolt, 83: bolt, 84: nut,
90, 91: Additional plate, 91a, 91b: Attachment portion of the additional plate, 91c: Folding line of the additional plate

Claims (5)

A wood beam joining structure that joins a wooden beam having an upper flange, a lower flange, and a web that connects them vertically to other structural members,
An attachment plate made of steel is fixed to both sides of the web,
The attachment plate is joined to the other structural member;
One of the attachment plates fixed on both sides of the web is provided with a plurality of through holes,
A screw having a drilling function and a tapping function is screwed into the other of the web and the additional plate through the through-hole, and is penetrated and fixed so that both the additional plates sandwich the web. Characteristic wood beam joint structure   2. The wood according to claim 1, wherein the attachment plate includes a protruding portion in a horizontal direction along an upper edge and a lower edge, and the protruding portion is in contact with the upper flange and the lower flange. Beam connection structure. The web includes a first group of plate members in which a plurality of plate members having a predetermined width are inclined in the axial direction of the wooden beam, and a plurality are arranged at predetermined intervals in the axial direction of the wooden beam; A plate member having the same width is inclined in the opposite direction to the plate member of the first group, and a plurality of second plate members arranged at a predetermined interval in the axial direction of the wooden beam are joined so as to overlap each other. Formed,
The screw includes a plate member included in the first group and a plate member included in the second group that overlap each other at a portion where the plate member is overlapped with each other. The joint structure of wooden beams according to claim 1 or 2.   The attachment plate is provided to be bent by a vertical fold line from the edge of the side to be joined to the other structural member to the central portion of the wooden beam so as to project to the side of the web. 4. The wood beam joining structure according to claim 1, further comprising vertical ribs. The attachment plate projects from the edge of the web in the axial direction of the wooden beam,
The overhanging portion is bent in the direction along the side surface of the beam to be joined having the upper and lower flanges and webs made of wood material, which is the other structural member,
A through hole is also provided in the bent portion of the attachment plate,
The bent portion of the attachment plate is brought into contact with the side surface of the web made of a wood material of the beam to be joined,
A steel plate material is brought into contact with the back side of the web of the beam to be joined, and a screw having a drilling function and a tapping function is screwed into the web of the beam to be joined and the steel plate material from the through hole, and the additional plate is The wood beam joint structure according to any one of claims 1 to 4, wherein the joint structure is fixed to the joint beam.

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