JP2017115557A - Junction structure for beam, and beam receiving metal fittings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To join a wooden beam with which a tendon is disposed in a lower part in an axial direction, with a joined member in such a manner that an end portion of the beam is supported, and to suppress cracking of the beam in the axial direction at a position where the tendon is disposed.SOLUTION: Beam receiving metal fittings 3 are fixed to a substantially vertical face of a joined beam 2, and an end portion of a wooden beam 1 is coupled to the beam receiving metal fittings. In the beam, a tendon 5 is disposed along a lower edge in an axial direction and in an end portion, slits 14 are provided at both sides of the tendon and in a direction along a side face of the beam. The beam receiving metal fittings comprise: a fixed base 31 which is fixed while being abutted to the side face of the joined beam; and two expanded plates 32 which are expanded at the fixed base in a substantially perpendicular direction. The expanded plates are coupled to the beam while being inserted into the slits. The expanded plates extend lower than a position where the fixed base is fixed to the joined beam, and a horizontal part 38 in the vicinity of a lower end is exposed from a bottom face of the beam and abutted to the bottom face of the beam at a lower side of a position where the tendon is disposed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a joint structure that joins a wooden beam to another structural member such as a beam or a column, and a beam receiver that can be used in this joint structure.

  In a wooden building, in order to suppress deflection and vibration of a beam that supports a floor or the like, a wooden beam having a large vertical dimension, that is, a large beam is often used. As a structure for joining and supporting the ends of these beams to other beams or pillars, many structures using beam receiving hardware have been proposed. For example, Patent Document 1 discloses one. In this joint structure, a horizontal member joining bracket corresponding to a beam support is fixed to the side surface of a wooden column, and the horizontal member is attached to the horizontal member mounting part provided in the horizontal member joining bracket. is there. The horizontal member mounting piece is a plate-like member protruding in the axial direction of the horizontal member, and the horizontal member is attached to the horizontal member by a pin inserted so as to penetrate the horizontal member from the side of the horizontal member. It can be attached to the piece.

  On the other hand, in a beam having a large span, for example, Patent Document 2 discloses that a beam is enlarged and a prestress is introduced by disposing a tension member at a lower portion of the beam. The end of the tension material is fixed to the wooden member beam with the tension force introduced, and a notch is provided at the lower part of the beam end, and the tension force is introduced to the tension material by operation from within the notch. It is described.

JP 2001-271426 A JP 2013-189863 A

When a tension member is arranged along the axial direction of the beam and prestress is applied to the beam by introducing a tension force, when the tension material is fixed at the end of the beam, the beam is applied by the force acting from the fixing member of the tension material. Produces a tensile force perpendicular to the axis of the tendon. A beam, which is a wooden member to which a tendon is fixed, generally has a wood grain in the axial direction, and is easily split by the tensile force.
Further, when the tendon is fixed at the end of the beam, it is supported by the beam receiver at the upper part of the beam. In the vicinity of the end of the beam supported in this way, a diagonal tensile force acts due to a shearing force when a load or the like is applied on the beam, which may promote the occurrence of splitting near the position where the tension material is fixed. There is.

  The present invention has been made in view of the circumstances as described above, and its purpose is to firmly support a wooden beam by a beam bracket and to split a beam in which an axial tension material is disposed at the bottom. The present invention is to provide a beam joining structure capable of suppressing the above-mentioned problem and a beam receiving metal that can be used in such a joining structure.

  In order to solve the above-described problem, the invention according to claim 1 is directed to a beam receiver in which a beam receiver is fixed to a substantially vertical surface of a member to be joined, and an end of a wooden beam is coupled to the beam receiver. A tension structure is arranged on the beam along the lower edge of the beam in the axial direction of the beam, and the tension material is fixed at the end of the beam in a state where the tension force is introduced. In addition, slits are provided on both sides of the tendon material in a direction along the side surface of the beam, and the beam support is fixed to a substantially vertical surface of the member to be joined, and a fixed base, And two projecting plate portions projecting in a direction substantially perpendicular to the fixed base from two side edges in the vertical direction of the fixed base, and the tension base is the beam Fixed to the member to be joined at a position higher than the position fixed to An extended plate portion is coupled to the beam in a state of being inserted into the slit, and the extended plate portion is extended downward from a position where the fixed base is fixed to the member to be joined, and a lower end portion is Provided is a beam joining structure that is exposed from the lower surface of the beam and is in contact with the lower surface of the beam below the position where the tendon is disposed.

In this beam connection structure, the tension material into which the tensile force is introduced is fixed to the beam, so that an axial compressive force acts on the beam, and along with this, a force in a direction that causes splitting of the beam, that is, a vertical direction force. Tensile force is generated. Further, an oblique tensile stress acts on the end portion of the beam due to a shearing force. As a result, the beam may be cracked in the horizontal direction, but the position where the tendon is disposed by the overhanging plate portion is supported from the lower side, and the crack in the axial direction of the beam is suppressed. In other words, the overhang plate portion is supported by a fixed base fixed at a position higher than the position where the tension material is disposed, and the portion extended below the overhang plate portion is below the position where the tension material is disposed. It abuts and supports the beam to be lifted from below. Therefore, a tensile force acts on the portion extended below the projecting plate portion, and a force in the direction of compressing in the vertical direction acts on the portion where the tension member of the beam is disposed. This acts so as to cancel the tensile force in the vertical direction of the beam at the position where the tendon is disposed, thereby suppressing the crack in the axial direction of the beam.
Moreover, the edge part of a beam is supported by a to-be-joined member via a fixed base by couple | bonding with an overhang | projection board part. When the projecting plate portion is inserted into the slit provided in the beam and coupled to the beam, the beam receiving metal is not exposed on the side surface of the beam, and the side surface of the beam is exposed indoors. In addition, a good finish can be obtained. In addition, it is easy to attach a wall base material or the like when applying the interior.

  The invention according to claim 2 is the beam joining structure according to claim 1, wherein the beam has an abutting portion in which an upper portion in the height direction of the end surface abuts on a substantially vertical surface of the member to be joined. And a notch is provided in the lower part in the height direction so that the end face of the beam recedes in the axial direction, and the notch can apply tension to the tendon from within the notch. The portion that extends below the projecting plate portion has a shape and dimensions that are possible, and the portion of the beam extends from the range where the notch is provided in the beam to the center side between the branches of the beam. It shall be in contact with the lower surface.

  In this beam joining structure, the projecting plate part of the beam receiving metal part projects from the notch to the center side of the span of the beam and is in contact with the lower surface of the beam, so that tension is applied even after the beam is joined to the member to be joined. It does not hinder the work of introduction or release. Therefore, it is possible to introduce the tension force of the tension material from the notch, or to additionally introduce or partially release the introduced tension force. And it restrains so that the circumference | surroundings of the tension material arrange | positioned so that introduction | transduction of tension | tensile_strength etc. can be performed from the inside of a notch can suppress that a crack arises in a beam.

  According to a third aspect of the present invention, in the beam joining structure according to the first or second aspect, the lower end portions of the two projecting plate portions are bent in a direction facing each other at a position exposed from the lower surface of the beam. And are separated from each other.

  In this beam connection structure, the overhanging plate portion is inserted into a slit formed in the beam, and bending deformation is constrained in the slit, so that a vertical force acts on the bent portion from the lower surface of the beam. However, deformation is not likely to occur. Therefore, it is possible to effectively restrain the portion where the tension material of the beam is disposed. And it becomes easy to process the beam receiver, and the workability is improved when it is inserted into the slit formed in the beam and joined so as to support the beam with the beam receiver.

  According to a fourth aspect of the present invention, there is provided a fixed base that is fixed in contact with a substantially vertical surface of a member to be joined to which an end of a wooden beam is joined, and two side edges in the vertical direction of the fixed base Each projecting from the position where the fixed base is fixed to the member to be joined. It extends downward, passes through both sides of the tendon disposed along the axial direction of the beam at the lower part of the beam, and the lower end is below the position where the tendon is disposed and on the lower surface of the beam. The present invention provides a beam receiver that is abutted.

  In this beam receiver, it is possible to support the end portion of the beam in which the tension material is arranged in the lower portion along the axial direction, and to join the beam to the member to be joined. Then, the projecting plate portion is in contact with the lower surface of the beam below the position where the tension material is disposed, and the fixed base is fixed to the joined member at a position higher than the position where the tension material is disposed. The vicinity of the position where the tendon is arranged can be restrained so as to be supported from below. Thereby, a compressive force is applied so as to cancel the tensile force in the vertical direction of the beam at the position where the tendon is disposed, and cracking in the axial direction of the beam is suppressed.

  As described above, in the beam connection structure of the present invention and the beam connection structure using the beam support of the present invention, the end portion of the beam in which the tension material is disposed along the axial direction is supported at the lower part. Thus, it is possible to join the member to be joined as well as to suppress the crack in the axial direction of the beam at the position where the tension material is disposed.

It is the schematic perspective view and exploded perspective view which show the joining structure of the beam which is one Embodiment of this invention. FIG. 2 is an elevational sectional view of the beam joining structure shown in FIG. 1. FIG. 2 is a cross-sectional plan view of the beam joining structure shown in FIG. It is the top view, side view, bottom view, and front view which show the processing state of the beam joined by the joining structure of the beam shown in FIG. It is the schematic which shows the tension | tensile_strength material for introducing a prestress to the beam shown in FIG. 4, and the fixing tool of a tension | tensile_strength. FIG. 2 is a plan view, a front view, a side view, and a rear view of a beam receiver used in the beam joining structure shown in FIG. 1. It is a schematic perspective view which shows the joining structure of the beam which is other embodiment of this invention. It is a schematic sectional drawing of the joining structure of the beam shown in FIG. It is a schematic sectional drawing which shows the joining structure of the beam which is other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view and an exploded perspective view showing a beam joining structure according to an embodiment of the present invention. 2 is an elevational sectional view of the beam joining structure shown in FIG. 1. FIG. 2 (a) is an axial sectional view of the beam to be joined, and FIG. 2 (b) is FIG. 2 (a). FIG. 3 is a vertical sectional view taken along line BB shown in FIG. 2, and FIG. 3 is a plan sectional view taken along line CC shown in FIG.
In this beam connecting structure, the wooden beam 1 is abutted against the side surface of the beam 2 to be bonded, which is another wooden beam, and the upper surfaces of both beams are bonded to have substantially the same height. . A beam receiver 3 is fixed to a side surface of the beam 2 to be joined by a plurality of bolts 4, and an end portion of the beam 1 to be joined is supported by the beam receiver 3. The structure for supporting the other end of the beam 1 to be joined and the structure for supporting the beam 2 to be joined include a structure supported by a column, a structure supported by another beam, and a structure that constitutes a ramen structure together with the column. Various support structures can be used.

  The beam 1 has a flat cross section in which the dimension in the height direction, that is, the beam length, is larger than the width, and is a laminated material formed by bonding a plurality of wooden members. The beam 2 to be joined is also a wooden laminated material having a flat cross section with a beam cross section larger than the beam width, and the beam cross section is smaller than the beam 1 to be joined.

The beam 1 has a tension member 5 disposed in the vicinity of the lower edge and prestress is introduced. In order to fix the tension member 5 and the beam 1 to the beam 2 to be joined, the beam receiver 3 is used. In order to join, it has been processed as shown in FIG.
As shown in this figure, a notch 13 is provided from the end surface 11 to the lower surface 12 of the beam at the end of the beam. In other words, the end surface 11 of the beam 1 is a contact portion facing the side surface of the beam 2 to be welded, with the range of almost the same dimension as that of the beam of the beam 2 to be welded being almost vertical from the upper edge. And the notch is provided in the lower side of this contact part so that the end surface 11 may recede to the center side of the span of the beam 1, and the inner surface of the notched part has a curved shape.

Two slits 14 are formed from the end face of the beam 1 toward the center of the span of the beam 1 so as to be substantially parallel to the side surface of the beam. These slits 14 are provided at both sides of the position where the tendon is disposed at a predetermined interval in the width direction of the beam. In the axial direction of the beam 1, the slit 14 has substantially the same depth in the upper predetermined range, and in the lower predetermined range, the depth of the slit 14 increases toward the center of the span, and the formation range of the slit 14 is increased. It expands to the center side of the branch.
The end surface 11a between the two slits 14 is slightly retracted to the center side of the support from the end surface 11b between the slit 14 and the side surface, and the end surface 11b between the slit 14 and the side surface is the side surface of the beam 2 to be joined. A part of the beam receiver 3 is accommodated between the end surface 11 a between the slits 14 and the side surface of the beam 2 to be joined.
The beam 1 is formed with a plurality of lateral holes 15 penetrating almost horizontally from one side surface of the beam 1 to the opposite side surface within the range in which the slit 14 is formed. The pin 21 is pushed in. A projecting plate portion 32 of a beam receiving metal member 3 to be described later is inserted into the slit 14, and the pin 21 is locked to the projecting plate portion 32 so that the beam 1 is supported by the beam receiving metal device 3. Yes.

Moreover, the process for arrange | positioning the tension material 5 is given to the lower part of this beam 1. As shown in FIG. A first hole 16 having a circular cross section in the axial direction is formed between the two slits 14 in the notch 13 provided at the end of the beam 1, and the inner diameter of the first hole 16 from the bottom is further increased. A second hole 17 having a small cross section and a substantially circular cross section is formed. The first hole 16 is formed so that the fixing portion of the tension member 5 disposed at the lower part of the beam 1 is exposed, and a tensioning force is introduced by attaching a device such as a jack to the tension member 5. It has the dimension which can be. As shown in FIG. 5, the second hole 17 is a screw member 22 used as a fixing tool, and is formed so as to substantially correspond to the length of the screw member 22. And the groove | channel (not shown) with which the helical protrusion part of the screw member 22 is engaged is formed in the surrounding surface.
An axial groove 18 that is open to the lower surface of the beam is formed in the center of the span of the beam from the area where the second hole 17 is formed. This groove 18 extends in the axial direction from the notch 13. It communicates with the formed second hole 17.

As shown in FIG. 5, the tension material 5 is arranged on the wooden beam thus processed, and prestress is introduced.
The tendon 5 is made of a steel rod, and an external thread 5a is formed on the outer peripheral surface near the end, so that the nut 23 can be twisted together. The screw member 22 has a spiral projecting portion formed on the outer peripheral surface of the cylindrical main body, and can be screwed into the second hole 17 formed in the beam 1. The screwed screw member 22 is screwed into a spiral groove formed on the inner peripheral surface of the second hole 17 and fixed to the beam 1 made of a wood material. A plurality of recesses are formed on the end face of the screw member 22 so that a tool or the like can be engaged when screwed into the beam 1.

  A hollow hole in the axial direction is formed in the main body of the screw member 22, and the tension material 5 can be inserted through the hollow hole. The tendon 5 is inserted into the hollow hole of the screw member screwed into the second hole 17 from the inside of the groove 18 and protrudes to the end of the beam 1, and the plate 24 and the nut 23 are attached to the end of the tendon 5. can do. By tightening the nut 23 in a state where the tension force is introduced to the tension member 5, the tension force is transmitted from the nut 23 to the screw member 22 through the plate 24, and the peripheral surface of the screw member 22 is made of a wood material. The tension material 5 is fixed to the beam 1 by being fixed to the beam 1. A cap nut 25 is twisted on the end of the tension member 22 so as to overlap the nut 23 and tightened to the nut 23. This prevents the nut 23 from loosening and protects the tendon 5.

FIG. 6 is a plan view, a front view, a side view, and a rear view of the beam receiver 3 fixed to the side surface of the beam 2 to be joined.
The beam receiver 3 includes a fixed base 31 that is in contact with a side surface of the wooden beam 2 and two protruding plate portions 32 that protrude in parallel from both side edges of the fixed base 31 in the vertical direction. is there. The beam receiver 3 is formed by bending a steel plate, and the thickness of the steel plate is such that excessive deformation does not occur when the beam 1 is supported by being fixed to the beam 2 to be joined. It is to be equipped with.

The fixed base 31 is provided with a plurality of bolt holes 33 through which bolts 4 for fixing the beam receiver 3 to the wooden beam 2 are inserted. Further, the periphery of the bolt hole 33 is a convex portion 34 protruding to the side of the beam to be joined as shown in FIG. 2 or FIG. These convex portions are formed by pressing, and can be fitted into the concave portions 2a provided in the beam 2 to be joined.
The overhanging plate portion 32 is provided with a plurality of pin holes 35 through which the pins 21 for coupling the beam 1 to be joined to the beam receiving member 3 are inserted, and at the upper end, a cut-off portion on which the pin 21 is locked. A notch 36 is provided.

  The overhanging plate portion 32 extends downward from the position where the fixed base 31 is fixed to the beam 2 to be joined, and the portion 37 is in the direction in which the overhang length from the center of the span of the beam 1, that is, the fixed base 31 is increased. Sticks out. The tip has a horizontal portion 38 that is bent in the horizontal direction. When the overhanging plate portion 31 is coupled to the beam 1, the horizontal portion 38 comes into contact with the lower surface of the beam 1. It has become.

As shown in FIG. 1 (b), the beam receiver 3 is fitted with a convex portion 34 of the beam receiver in a recess 2 a provided at a position where the beam receiver 3 of the beam to be joined 2 is fixed. It is fixed as it is put. The welded beam 2 has a horizontal hole penetrating the welded beam 2 in the horizontal direction from the bottom of the concave portion 2a, and is inserted into the horizontal hole from the side opposite to the side surface where the concave portion 2a of the welded beam 2 is formed. The bolt 4 is inserted into the bolt hole 33 of the fixed base 31. The beam receiver 3 is fixed to the side surface of the wooden beam 2 by tightening and tightening the nut 6 to the bolt 4 from between the two projecting plate portions 32. The nut 6 is accommodated in a concave portion due to the provision of the convex portion 34 on the fixed base 31 by pressing, that is, in the concave portion on the side to be joined to the beam 1 of the fixed base 31. Yes.
In the present embodiment, a nut with a plate-like leaf spring is used as the nut 6, but other nuts can be used, and it is preferable to have a locking means.

  As shown in FIG. 1B, the beam 1 supported by the beam receiver 3 fixed to the beam 2 to be joined as described above has the protruding plate 32 of the beam receiver inserted into the slit 14. It is supported in the state. The pin 21 is inserted into the lateral hole 15 from the side surface of the beam 1 and passes through the pin hole 35 of the projecting plate portion 32, so that the beam 1 is coupled to the beam receiver 3. At this time, the portion 37 extended downward from the projecting plate portion 32 projects obliquely downward toward the center of the span in the axial direction of the beam 1 in the slit 14 as shown in FIG. This downwardly projecting portion 37 avoids the area in which the notch 13 is provided to the center side of the span, reaches the both sides of the position where the tension member 5 and the screw member 22 are disposed, and is further provided with the notch 13. It is exposed to the lower side of the beam 1 from the slit 14 at the center side of the span of the beam 1 from the above range. The exposed lower end portion is bent below the position where the tendon 5 is arranged, that is, the two overhanging plate portions 32 are opposed to each other, and the substantially horizontal horizontal portion 38 is brought into contact with the lower surface of the beam 1. Yes. The front end surfaces of the horizontal portions 38 provided at the front end portions of the both projecting plate portions 32 are opposed to each other with a space therebetween.

  In such a beam joining structure, the end portion of the beam 1 is supported by the projecting plate portion 32 of the beam receiver 3 through the plurality of pins 21, and is extended by a portion 37 extending below the projecting plate portion 32. Supported by the lower surface of the beam 1. That is, the shearing force acting on the end of the beam 1 is transmitted from the pin 21 to the fixed base 31 via the overhanging plate portion 32, and also from the portion 37 extended below the overhanging plate portion 32 to the fixed base 31. Communicated. And it is transmitted to the to-be-joined beam 2 from the fixed base 31 through the bolt 4. At this time, a tensile force acts on the portion 37 extended below the overhanging plate portion 32, and a compressive force acts on the beam 1 in the vertical direction by supporting the beam 1 from the lower surface. Thereby, it is possible to prevent the beam 1 from being cracked due to the oblique tensile force at the end of the beam 1 and the splitting force generated by fixing the tension member 5 to the end of the beam 1.

  In addition, when joining the said beam 1 to the to-be-joined beam 2 to which the beam receiving fixture 3 was fixed, while arrange | positioning the tension | tensile_strength material 5 previously to the beam 1, tension | tensile_strength can be introduce | transduced. And it lifts in the state which inserted the pin 21a in the horizontal hole 15a formed in the top, and slowly so that the overhang | projection board part 32 of the beam receiving metal object 3 may enter into the slit 14 from the upper part of the position joined with the to-be-joined beam 2. And descend. The pin 21a inserted into the uppermost horizontal hole 15a is locked to a notch 36 formed at the upper end of the overhanging plate portion 32 as shown in FIG. The beam 1 is temporarily supported while being in contact with the horizontal portion 38 of the hardware 3. In this state, the other pin 21 is inserted into the horizontal hole 15, whereby the beam 1 is coupled to the beam 2 to be joined through the beam receiver 3. Further, after the beam 1 is joined to the beam 2 to be joined, a jack or the like can be attached from within the notch 13 to introduce additional tension to the tension member 5 or to release part of the tension. Adjustment is possible.

The beam joining structure described above is joined so that the end surface of the beam 1 abuts against the side surface of the beam 2 to be joined, but the end surface of the beam 41 is joined to the end surface of the beam 42 to be joined as shown in FIG. It can also be joined so as to abut.
In this beam connection structure, a beam 42 to be bonded is supported on a column 43. That is, the upper end surface of the column 43 and the lower surface of the beam 42 to be joined are brought into contact with each other and joined. The cross section of the column 43 is a flat rectangle in which the dimension in the axial direction of the beam 42 is larger than the width direction of the beam 42. Further, notches 43a are provided at both ends of the cross section of the pillar 43 in the long side direction, and screw members 44 are screwed into the notches 43a in the axial direction of the pillar 43 as shown in FIG. . Further, a screw member 45 is screwed in the vertical direction at a position corresponding to the position where these screw members 44 are screwed in the beam 42 to be joined, and the screw member 45 and the column screwed into the beam 42 to be welded. The to-be-joined beam 42 and the column 43 are joined by connecting the screw member 44 screwed into the joint via the joint fitting 46. Therefore, a bending moment can be transmitted between the beam to be joined 42 and the column 43, and these form a rigid frame structure. The screw members 44 and 45 may be, for example, those in which screw holes are formed in the axial direction from the end face, and can be joined to the joint metal fitting 46 by bolts 47a and 47b screwed into these screw holes. Is.

  The beam 41 to be joined to the welded beam 42 has a tension member 48 arranged at the lower part, and has a larger beam length than that of the joined beam 42, as shown in FIGS. The same thing. The end face of the beam 41 is joined to the welded beam 42 via a beam receiver 50 fixed to the end face of the joined beam 42. The beam receiver 50 is the same as that shown in FIG. 6, and the beam 41 is coupled to the beam receiver 50 in the same manner as the embodiment shown in FIGS.

  In this embodiment, the beam receiver 50 is fixed to the end face of the beam 42 to be joined using a screw member 45 screwed to join the column 43 at the end of the beam 42 as shown in FIG. Has been. The screw member 45 screwed into the end portion of the beam to be joined 42 has a screw hole formed in the axial direction from the end surface, and a screw hole in a direction perpendicular to the axis of the screw member 45 is provided on the peripheral surface. A bolt 49 for fixing the beam receiver 42 is inserted into a bolt hole of the fixing base 51 and is screwed into a screw hole formed in the screw member 45 to fix the beam receiver 50 to the beam 42 to be joined. It has become.

Even in such a bonded structure, the end of the beam 41 is bonded to the bonded beam 42 via the beam receiving metal 50, and the shearing force acting on the beam 41 is transmitted to the bonded beam 42. The portion 53 extended below the overhanging plate portion 52 supports the beam 41 on the lower surface, so that the tension material is fixed to the end portion of the beam via the oblique tensile force at the end portion of the beam 41 and the screw member 48. It is possible to prevent the beam 41 from being cracked by the splitting force generated by the operation.
Further, the beam 42 to be joined forms a frame structure together with the column 43, and the deflection angle of the end portion is smaller than that of the simply supported beam. Therefore, the variation of the relative deflection angle when joined to the beam 41 is reduced, and the beam 41 and the joined beam 42 are joined in a stable state.

FIG. 9 is a schematic cross-sectional view showing a beam joining structure according to another embodiment of the present invention.
In this beam bonding structure, a beam 61 having a larger beam length than that of the beam 1 to be bonded in the embodiment shown in FIGS. 1 to 5 is bonded to the beam 62 to be bonded. In this way, the beam 61 having a large beam can withstand a large bending moment and shearing force, and accordingly, the number of bolts 68 for fixing the beam receiver 63 to the beam to be joined 62 is increased. . The to-be-joined beam 62 is smaller than the beam 61, and is joined so that the beam 61 abuts the entire area in the height direction on the side surface of the to-be-joined beam 62. Even in this joining structure, the projecting plate portion 65 of the beam receiving member 63 is provided with a portion 66 extending downward from a position where the fixed base portion 64 is fixed to the joined beam 62. The horizontal portion 67 near the tip is brought into contact with the lower surface of the beam 61, and supports the lower surface of the beam 61 below the position where the tension member 69 and the screw member 70 are disposed. Thereby, the crack by the diagonal tension | tensile_strength of the beam 61 to which a big shear force acts, and a tension | tensile_strength material is arrange | positioned is suppressed.

In the beam joint structure described above, the member to be joined is a wooden joined beam, and the beam of the joined beam is smaller than the beam to be joined to the joined beam. The abutting portion that abuts the beam is abutted against the entire area in the height direction of the side surface or end surface of the beam to be joined. In such a joint structure, since the height of the beam to be joined is larger than the beam to be joined, the lower part of the beam to be joined is below the lower end of the joined beam, but the lower part of the overhanging plate part is the beam. The lower surface of the beam is abutted to support the beam from below, and the shearing force acts smoothly from the beam to the beam to be joined.
On the other hand, it is assumed that the beam of the beam to be bonded which is a member to be bonded is larger than the beam of the beam to be bonded to the beam to be bonded. Can be abutted against a part of the side surface or end surface of the beam to be joined in the height direction so that the upper edge of the beam to be joined and the beam to be joined to the beam are joined at substantially the same height. In such a joining structure, a notch is provided at the lower end portion of the beam, and it is possible to apply tension to the tension material from within the notch, thereby joining the beam to a to-be-joined beam having a large beam length. Later, additional tension can be introduced or part of the tension can be released, and the tension can be adjusted.

Further, the above-described beam joining structure and beam support are embodiments of the present invention, and the present invention is not limited to the above-described embodiments, and each member is within the scope of the present invention. The shape, dimensions, etc. can be changed and implemented in other ways.
For example, in the above embodiment, the beam is joined to another beam, but it can be joined to the side surface of the column, and is not limited to the wooden material beam or column, and firmly fixes the beam receiving hardware. As long as it can be used, it may be a structural member formed of steel or concrete.
On the other hand, the beam to be joined is not provided with a notch at the end, and the tension material can be fixed without protruding from the end face of the beam which is substantially vertical. And the overhang | projection board part of a beam receiving metal object shall be extended below, and shall be contact | abutted on the lower surface of a beam below a tension material.
In addition, the horizontal portion provided at the lower end of the overhanging plate portion is not limited to those facing each other with a space between them, and the horizontal portion bent from both overhanging plate portions is welded and joined by abutting the tip surfaces. Also, those that are overlapped with each other, those that are overlapped with each other and welded, etc. can also be employed.

1: Beam, 2: Beam to be joined, 3: Beam support, 4: Bolt, 5: Tensile material, 6: Nut,
11: End face of the beam, 12: Lower surface of the beam, 13: Notch, 14: Slit provided at the end of the beam, 15: Lateral hole provided in the beam, 16: First hole, 17: Second Hole, 18: groove,
21: Pin, 22: Screw member, 23: Nut, 24: Plate, 25: Cap nut,
31: Fixed base, 32: Overhang plate portion, 33: Bolt hole, 34: Convex portion, 35: Pin hole provided in the overhang plate portion, 36: Notch provided in the overhang plate portion, 37: Overhang plate The part extended below the part 38: Horizontal part,
41: Beam, 42: Beam to be joined, 43: Column, 44: Screw member screwed into the column, 45: Screw member screwed into the beam to be joined, 46: Joining fitting, 47: Joining fitting and screw member Bolt to join, 48: Screw member for fixing the tension material, 49: Bolt to fix the beam support,
50: Beam receiving metal, 51: Overhang plate part, 52: Fixed base part,
61: Beam, 62: Beam to be joined, 63: Beam receiving metal, 64: Fixed base, 65: Overhang plate portion, 66: Part extended below the overhang plate portion, 67: Horizontal portion, 68: Bolt, 69 : Tensile material, 70: Screw member

Claims (4)

A beam connecting structure in which a beam receiver is fixed to a substantially vertical surface of a member to be bonded, and an end of a wooden beam is coupled to the beam receiver,
A tension material is disposed on the beam along the lower edge of the beam in the axial direction of the beam, and the tension material is fixed at an end of the beam in a state in which the tension force is introduced. Slits are provided on both sides of the tendon in a direction along the side of the
The beam receiver is fixed to a fixed base in contact with a substantially vertical surface of the member to be joined, and directions perpendicular to the fixed base from two side edges in the vertical direction of the fixed base, respectively. Two projecting plate parts projecting to
The fixing base is fixed to the member to be joined at a position higher than a position where the tendon is fixed to the beam;
The projecting plate portion is coupled to the beam in a state of being inserted into the slit,
The projecting plate portion extends downward from a position where the fixed base portion is fixed to the member to be joined, and a lower end portion is exposed from the lower surface of the beam and is below the position where the tendon is disposed. A beam joining structure, wherein the beam is in contact with the lower surface of the beam. The beam has an abutting portion in which the upper portion in the height direction of the end surface abuts on the substantially vertical surface of the member to be joined, and the end surface of the beam recedes in the axial direction at the lower portion in the height direction. Notches are provided,
The notch has a shape and size capable of imparting tension to the tendon from within the notch,
The portion extended below the projecting plate portion is in contact with the lower surface of the beam at a position projecting from the range where the notch is provided in the beam to the center side between the supports of the beam. The joint structure of a beam according to claim 1.   3. The beam according to claim 1, wherein lower ends of the two projecting plate portions are bent in directions facing each other at a position exposed from a lower surface of the beam and separated from each other. Junction structure. A fixed base that is fixed in contact with a substantially vertical surface of a member to be joined to which an end of a wooden beam is joined;
Projecting from the two side edges in the vertical direction of the fixed base in a direction substantially perpendicular to the fixed base, and two projecting plate portions coupled to the beam,
The overhang plate portion extends downward from a position where the fixed base portion is fixed to the member to be joined, and passes through both sides of the tension member disposed along the axial direction of the beam at the lower portion of the beam. A beam receiving metal object characterized in that a lower end part is brought into contact with a lower surface of the beam below a position where the tendon is disposed.

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