JP2020037778A - Beam joining structure - Google Patents

Abstract

To join the end faces of two beams so as to transmit bending moment and shearing force, and to suppress cracks in the end parts of the beams.SOLUTION: Cutting holes 13, 14 are provided in the axial direction from the upper part and the lower part of the end face of the first beam 1, and an upper screw member 11 and a lower screw member 12 are screwed in. Upper and lower screw members 21, 22 are also screwed into the second beam in the axial direction, and bending moment can be transmitted between beams by connecting them through connecting members 31, 32. The end of the first beam is provided with a vertical cutting hole 17 in the vertical direction crossing the cutting hole in the axial direction, and a vertical screw member 15 is screwed to a position where the entire length of the screw passes the cutting hole in the axial direction. A beam receiving metal fitting 34 is fixed to the end face of the first beam by a bolt whose tip is screwed into the vertical screw member, and is connected to the second beam so that shearing force can be transmitted. In the vicinity of the screw member screwed into the first beam, long screws 18, 19 for suppressing the crack of a wood material are screwed.SELECTED DRAWING: Figure 2

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for joining two beams made of a wood material with their end faces facing each other, and more particularly to a joining structure for beams capable of resisting a bending moment and a shearing force at a joining portion.

  As a structure for joining the end of a beam made of a wood material to another structural member, for example, a column or another beam, a structure using metal is widely adopted. For example, in the structure described in Patent Literature 1, a metal joint is fixed to a pillar or the like, and the end of the beam is supported by the metal joint. In this structure, a shear force acts on the end of the beam due to the weight of the beam and a vertical load acting on the beam, and the joint metal resists the shear force.

Further, in the joining structure described in Patent Document 2, a screw member is vertically screwed into an end portion of a beam and another beam to which the beam is joined, and a joining hardware is made of wood material through these screw members. Fixed to the beam.
As described in Patent Literature 1, in a structure in which a metal joint is fixed to a wooden material with a bolt or the like, when the shearing force acting on the end of the beam increases, stress concentrates on the wooden material around the bolt. For this reason, local deformation is likely to occur in the wood material, and a relative displacement may occur between both members to be joined. On the other hand, in the structure described in Patent Literature 2, the shear force transmitted from the joint metal can be dispersed by the screw member and transmitted to the wooden material, and the concentration of the stress on the wooden material can be reduced. Is done. For this reason, the joining structure described in Patent Literature 2 can be suitably adopted when the shear force acting on the end of the beam is large.

On the other hand, a structure in which an end of a beam is joined to another member so that a bending moment can be transmitted is described in, for example, Patent Document 3.
In a somewhat large wooden building such as a meeting place or an apartment house, a wooden material having a large member size is often used, and particularly, a beam having a large height is often used. In addition, a rigid frame structure in which a bending moment can be transmitted between a beam and a column may be adopted. In the structure described in Patent Document 3, a coupling member capable of transmitting a tensile force or a compressive force is embedded at a plurality of positions over two structural members to be joined. A bending moment is transmitted between the members by a tensile force or a compressive force acting on these connecting members.

JP 2001-271426 A JP 2004-092149 A Japanese Patent No. 6275798

However, the conventional beam joint structure has a problem that the following solution is desired.
In a large wooden building, the span length of a beam made of a wooden material is often long, and it is necessary to manufacture a long beam capable of continuously resisting a bending moment and a shear force. Even if a beam is manufactured using glulam, if the length of the beam manufactured in the factory increases, it is difficult to transport the beam to the building construction site. For this reason, it is divided into a plurality of members and manufactured, and connected so that bending moment and shear force can be transmitted at a construction site of a building.

However, in the joint structures described in Patent Literature 1 and Patent Literature 2, a shear force can be transmitted, but a large bending moment is not transmitted. Further, in the joint structure described in Patent Document 3, a bending moment is transmitted, but transmission of a shear force is not considered.
The transmission mechanism of the shear force described in Patent Literature 1 can be applied to the joining structure described in Patent Literature 3. However, in the joining structure of Patent Literature 1, the joining hardware is attached to beams and columns made of a wooden material by bolts or the like, and relative shear deformation is likely to occur between the joining members. When shear deformation occurs between both members to be joined, when used in combination with a bending moment transmission mechanism as described in Patent Document 3, along with the connecting member embedded in the axial direction of the beam, Cracks are likely to occur in wooden beams.

  On the other hand, in the joining structure described in Patent Literature 2, the shearing force is transmitted from the joining hardware to the beam made of the wood material via the screw member, and the relative shear deformation between the joining members is suppressed. However, when trying to apply the joining structure using a screw member that penetrates the beam in the vertical direction to the joining structure described in Patent Document 3, the screw member interferes with the joining member for transmitting the bending moment. Will do. For this reason, it is difficult to incorporate both members into the end of the beam. Further, when many members are incorporated at the end of the beam and the bending moment and the shearing force are transmitted through these members, cracks in the direction along the grain are likely to occur at the end of the beam.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to make two end faces of a beam face each other, to join them so that a bending moment and a shear force are transmitted, and to provide an end part of the beam. An object of the present invention is to provide a joint structure of a beam that is less likely to crack.

  In order to solve the above problem, the invention according to claim 1 is a beam joining structure in which an end face of a first beam made of a wood material and an end face of a second beam made of a wood material are opposed to each other and joined. A first upper screw member screwed into a first upper cutting hole and a first lower cutting hole provided in an axial direction of the first beam from an upper portion and a lower portion of an end surface of the first beam; A first lower screw member, and a second lower cutting hole screwed from an upper part and a lower part of an end face of the second beam into a second upper cutting hole and a second lower cutting hole provided in an axial direction of the second beam. A second upper screw member and a second lower screw member; a first vertical screw member screwed into a first vertical cutting hole provided vertically in an end of the first beam; The first vertical screw member is provided from the end face of the first beam. A beam receiving member fixed to an end face of the first beam by a bolt inserted into the drilled hole and screwed into a bolt hole provided on a side surface of the first vertical screw member; An upper connecting member that connects the screw member and the second upper screw member; a lower connecting member that connects the first lower screw member and the second lower screw member; And a beam receiving connecting member for connecting an end of the second beam. The first longitudinal cutting hole intersects at least one of the first upper cutting hole or the first lower cutting hole. The first longitudinal screw member is screwed into the first longitudinal cutting hole from the upper surface or the lower surface of the first beam, and the total length of the first longitudinal screw member is reduced. Intersecting the first upper part A joint structure of a beam screwed to a position passing through a cutting hole or a first lower cutting hole is provided.

In this beam joining structure, a screw member can be screwed into the end of the first beam joined to the second beam in three directions: a position along the upper surface and the lower surface and a position along the end surface. As a result, the first upper screw member and the first lower screw member screwed along the upper surface and the lower surface generate a compressive force and a tensile force generated near the upper surface and the lower surface by the bending moment between the second beam and the second beam. Will be communicated. Then, the shearing force is transmitted between both beams via the first longitudinal screw member and the beam receiving member.
Further, the first upper screw member and the first lower screw member for transmitting the bending moment, and the first longitudinal screw member for transmitting the shear force can be screwed in without interfering with each other. It becomes possible to realize a joint structure in which both the bending moment and the shear force are transmitted between the beams at the erection site of the beams.

  The invention according to claim 2 is the beam joint structure according to claim 1, wherein one of the first beams is provided above the first upper screw member or below the first lower screw member. The lateral long screw is screwed from the side surface of the first beam to the position above the first upper screw member or the lower side of the first lower screw member from the side surface to the other side surface, and the first beam A vertically long screw is screwed from the upper surface or the lower surface of the first upper screw member to a position where the tip passes vertically on both sides of the first upper screw member or the first lower screw member. Alternatively, the laterally long screw and the longitudinally long screw are screwed so as to surround three sides around the first lower screw member.

  In this joining structure, the long screw screwed around three sides around the first upper screw member or the first lower screw member resists the tensile force. Thereby, it is possible to suppress the occurrence of cracks in the wood material constituting the first beam and to suppress the large expansion even if the cracks occur.

  The invention according to claim 3 is the beam joint structure according to claim 1 or 2, wherein the first beam is provided between the first longitudinal screw member and an end face of the first beam. It is assumed that a second long screw in the horizontal direction is screwed from one side surface to the other side surface of the first vertical screw member to a position where a tip of the screw member passes through the side of the first vertical screw member.

  When a bending moment acts on the joint between the first beam and the second beam, a force may be exerted to pull out the first longitudinal screw member toward the end face via the beam receiving member. . In this joint structure, the long screw screwed between the first longitudinal screw member and the end face can suppress cracking of the wood material, and can prevent the end of the first beam from breaking. .

  The invention according to claim 4 is the beam joint structure according to any one of claims 1 to 3, wherein the first vertical screw member has a through hole formed in a direction perpendicular to an axis from a side surface. Wherein a pin is inserted into a pin hole formed in at least one place from one side to the other side of the first beam, and the pin is formed in the first longitudinal screw member. It is assumed that it is inserted through the through hole.

  In this joint structure, a bending moment acts on the joint between the first beam and the second beam, and a force acts to pull out the first longitudinal screw member toward the end face via the beam receiving member. At this time, the pin penetrating the first vertical screw member is pressed against the wood material of the first beam, and the displacement of the first vertical screw member toward the end surface is suppressed. Thereby, the occurrence of cracks between the first longitudinal screw member and the end surface is suppressed.

  According to a fifth aspect of the present invention, in the beam joining structure according to any one of the first to fourth aspects, the second beam has a corner between an end face and an upper face joined to the first beam. A notch is provided at a corner and a corner between the end face and the lower surface, and the upper connecting member and the lower connecting member are arranged in the notch, and the notch at an upper portion of the second beam is provided. A second vertical screw member is screwed into a second vertical cutting hole formed from the inside of the notch toward the notch provided at a lower portion, and the beam receiving connecting member is connected to one of the second beams. From the side surface to the other side surface, is inserted into a pin hole formed in at least one place, and is inserted into a hole formed in the beam receiving member and a through hole provided in the second vertical screw member. It shall be a pin.

  In this joint structure, the second longitudinal screw member can be screwed between the notches formed at the upper and lower portions at the end of the second beam. Therefore, the second vertical screw member can be screwed into the end of the second beam without interfering with the second upper screw member, the second lower screw member, and the upper connecting member and the lower connecting member. The beam receiving member and the second longitudinal screw member are connected by a pin inserted from a side surface of the second beam, and the first beam and the second beam are sheared between the first beam and the second beam via the beam receiving member. Power is transmitted effectively.

  The invention according to claim 6 is the beam joint structure according to any one of claims 1 to 4, wherein the first beam and the second beam have an end face and an upper face that are joined to each other. A notch is provided at a corner portion of the first upper screw member and the first lower screw member, and a second upper screw member and the second corner portion. The lower screw member is screwed in the axial direction of the first beam or the second beam from inside the notch, and the first vertical screw member is formed by cutting the notch of the first beam. Is screwed to a position farther from the end face than the range in which the notch is provided, and the second beam is vertically moved to a position farther from the end face than the range in which the notch of the second beam is provided. 2 vertical cutting holes are formed, and the second vertical cutting hole is formed. The direction cutting hole is provided so as to cross and communicate with at least one of the second upper cutting hole and the second lower cutting hole, and the second vertical cutting hole has an upper surface of a second beam. Alternatively, a second longitudinal screw member is screwed from the lower surface, and the second longitudinal screw member is screwed to a position passing through the second upper cutting hole or the second lower cutting hole whose entire length intersects. The beam receiving connecting member is inserted into a pin hole formed from one side surface to the other side surface of the second beam, and a hole formed in the beam receiving member and the second vertical It is assumed that the pin is a pin inserted into a through hole provided in the directional screw member.

  In this joint structure, the first beam and the second beam are provided with notches symmetrically with respect to the joint end face, and three screw members can be screwed into symmetrical positions. Therefore, it is possible to provide a structure in which the first beam and the second beam have substantially the same strength against the bending moment and the shear force acting on the joint.

  As described above, the beam joint structure of the present invention has a joint structure in which the bending moment and the shear force are transmitted between the two joined beams, and the ends of the beams are not easily cracked. Can be.

It is a schematic perspective view which shows the joint part of the beam joined by applying the joint structure of the beam which concerns on this invention. FIG. 2 is a side view of a joint structure of the beam shown in FIG. 1, which is an embodiment of the present invention. It is sectional drawing of the joining structure of the beam shown in FIG. FIG. 3 is an exploded perspective view showing a joint end of a first beam joined by the joint structure of the beam shown in FIG. 2. FIG. 3 is an exploded perspective view showing a joint end of a second beam joined by the joint structure of the beam shown in FIG. 2. FIG. 3 is a side view and an end view of a screw member used in the beam joint structure shown in FIG. 2. FIG. 3 is a top view, a front view, a bottom view, and a side view of a connecting member used in the beam joint structure shown in FIG. 2. FIG. 4 is a front view, a bottom view, and a top view, a front view, and a bottom view of an eccentric washer that forms another part of the connecting member used in the beam joining structure illustrated in FIG. 2. FIG. 3 is a top view, a front view, and a side view of a beam receiving member used in the beam joining structure shown in FIG. 2. FIG. 3 is an end view of an upper portion of a first beam joined by the beam joining structure shown in FIG. 2. FIG. 3 is a plan cross-sectional view of the beam joint structure shown in FIG. 2. FIG. 3 is a schematic perspective view showing a state when a first beam and a second beam are joined in the beam joining structure shown in FIG. 2. It is a side view 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 showing a joint portion of a beam joined by applying the joint structure of a beam according to the present invention. FIG. 2 is a side view of a joint structure according to an embodiment of the present invention, and FIG. 3 is a sectional view. FIGS. 4 and 5 are exploded perspective views showing joint ends of the beams joined by the joint structure of the beams shown in FIG.
This joint structure joins the first beam 1 and the second beam 2 with both end faces facing each other, and a bending transmission mechanism for transmitting a bending moment between both beams, and a shear force. And a shearing force transmitting mechanism for transmitting.

  The bending transmission mechanism is provided near the upper edge and the lower edge of the joint between the two beams, and the upper bending transmission mechanism is screwed in the axial direction from the upper end of the end face of the first beam 1. It has a first upper screw member 11, a second upper screw member 21 screwed in the axial direction at an end of the second beam 2, and an upper connecting member 31 for connecting these. The lower bending transmission mechanism also has the same configuration, and includes a first lower screw member 12 screwed into the first beam 1 and a second lower screw member 12 screwed into the end of the second beam 2. It comprises a lower screw member 22 and a lower connecting member 32 for connecting these.

Rectangular notches 2a and 2b are formed in the second beam 2 at the corners between the end surface and the upper surface and at the corners between the end surface and the lower surface, and the second upper screw member 21 and the second The lower screw member 22 is screwed in the axial direction of the second beam 2 from inside the notches 2a and 2b.
Further, the first upper screw member 11 and the first lower screw member 12 screwed into the first beam 1 are positioned so as to face the second upper screw member 21 and the second lower screw member 22. Is set.
The two connecting members 31 and 32 are arranged in the two notches 2a and 2b, respectively. The upper connecting member 31 is connected to the first upper screw member 11 and the second upper screw member 21 and the lower connecting member 32. Are connected to the first lower screw member 12 and the second lower screw member 22 by bolts 33.

  The first upper screw member 11 and the first lower screw member 12 form a first upper cutting hole 13 and a first lower cutting hole 14 in the axial direction from the upper and lower portions of the end face of the first beam 1. In addition, it is screwed into these cutting holes 13 and 14. Further, the second upper screw member 21 and the second lower screw member 22 are provided with second upper cutting holes cut in the axial direction from the vertical planes in the notches 2 a and 2 b provided in the second beam 2. 23 and the second lower cutting hole 24.

  The first upper screw member 11, the second upper screw member 21, the first lower screw member 12, and the second lower screw member 22 are the same as those shown in FIGS. As shown in (b), a helical projection 42 is provided on the peripheral surface of a metal rod-shaped member 41. A bolt hole 43 is formed in the axial direction from one end face, so that the bolt 33 for connecting the connecting member can be screwed. Further, a groove 44 is formed in the end face where the bolt hole 43 is formed so that a tool for applying a rotational force can be locked when screwing into a beam made of wood material.

  The connecting members 31 and 32 are box-shaped members made of metal as shown in FIG. 7, and include two end plate portions 51 and 52 facing the end surfaces of the beams and side plate portions 53 connecting these end portions. It is. The side plate portion 53 is provided so as to open the space between the two end plate portions 51 and 52 in one direction, and has a back surface closed by a curved cylindrical curved surface. Through holes 51a and 52a are formed in the two end plate portions 51 and 52, respectively. As shown in FIGS. 4 and 5, a bolt 33 inserted in the through hole is provided in a bolt hole provided in a screw member. The first upper screw member 11 and the second upper screw member 21 and the first lower screw member 12 and the second lower screw member 22 are connected by being screwed into the screw 43.

  The connecting member shown in FIG. 8 may be used instead of the connecting member shown in FIG. In this connection metal fitting 36, the diameter of a through hole 54a provided in one end plate portion 54 is larger than that of the connection member 33 shown in FIG. A circular plate-shaped eccentric washer 55 is fitted into the through-hole 54a from the inside of the box-shaped connecting member 36, and is engaged with the end plate 54 so as to be rotatable in the circumferential direction. The eccentric washer 55 has a long hole 55a through which the bolt 33 can be inserted. The long hole 55a has a long axis in the radial direction from the center of the circular eccentric washer 55. Therefore, the position of the bolt 33 inserted in the long hole 55a can be adjusted by rotation of the eccentric washer 55 and movement in the long axis direction in the long hole 55a.

  The shear transmission mechanism includes a first vertical screw member 15 vertically screwed into an end of the first beam 1 and a second vertical screw member vertically screwed into an end of the second beam 2. A direction screw member 25 and a beam receiving hardware 34 which is a beam receiving member fixed to the end surface of the first beam 1 are provided.

The same first vertical screw member 15 and second vertical screw member 25 are used, and as shown in FIGS. 6C and 6D, a metal rod-shaped member 45 is used. Is provided with a helical overhang 46 on the peripheral surface thereof. In these vertical screw members 15 and 25, a plurality of bolt holes 47 are formed at predetermined intervals on the peripheral surface in a direction perpendicular to the axial direction. These bolt holes 47 are formed with internal threads on the inner peripheral surface, and can screw in bolts 35 for fixing the beam receiving hardware 34 to the first beam 1. In addition to the bolt holes 47, a plurality of through holes 48 are formed at predetermined intervals in a direction perpendicular to the axis of the vertical screw member and perpendicular to the bolt holes 47. When the first longitudinal screw member 15 or the second longitudinal screw member 25 is screwed into the first beam 1 or the second beam 2, these through holes 48 form the beams 1 and 2. It is perpendicular to the axis. Then, pins 16 and 26 penetrating from one side surface of the first beam 1 or the second beam 2 to the other side surface can be inserted.
It should be noted that the second vertical screw member 25 may be one in which the bolt hole 47 is not formed.

  As shown in FIG. 4, the first longitudinal screw member 15 has a first longitudinal cutting hole 17 formed in advance at an end of the first beam 1 and the first longitudinal cutting hole 17. It is screwed into. The first vertical cutting hole 17 penetrates in the vertical direction, and is formed substantially at the center of the cross section of the first beam 1 in the width direction. The first beam 1 intersects with the first upper cutting hole 13 and the first lower cutting hole 14 provided substantially at the center in the width direction, and communicates with each other.

The first vertical screw member 15 is screwed into the first vertical cutting hole 17 from the upper surface or the lower surface of the first beam 1, and has a total length of the first upper cutting hole 13 or the first lower cutting hole 14. It is screwed up to the position where it passes. Therefore, after the first longitudinal screw member 15 is screwed in, the first upper cutting hole 13 or the first lower cutting hole 14 that intersects is opened without being closed by the first longitudinal screw member 15. It is in a state. Therefore, the first upper screw member 11 and the first lower screw member 12 can be screwed thereafter.
The first longitudinal screw member 11 screwed into the first beam 1 has a through hole formed in the peripheral surface, with the axis of the bolt hole 47 formed in the peripheral surface being perpendicular to the end surface of the first beam 1. The axis 48 is set at a position perpendicular to the side surface of the first beam 1.

  On the other hand, at the end of the second beam 2, as shown in FIG. 5, a second vertical cutting hole 27 penetrating from a horizontal surface in the upper notch 2a to the lower notch 2b is formed. A second vertical screw member 27 is screwed into the second vertical cutting hole 27. The second vertical screw member 27 is screwed so that the axis of the through hole 48 formed in the peripheral surface is perpendicular to the side surface of the second beam 2.

The beam receiving hardware 34 is a member formed by processing a steel plate. As shown in FIG. 9, the substrate portion 61 abutting on the end face of the first beam 1 and the side edges of the substantially rectangular substrate portion 61 are formed. And two projecting plate portions 62 projecting in the right angle direction.
A plurality of holes 61b through which bolts 35 for fixing the beam receiving hardware 34 are inserted are formed in the substrate portion 61, and the periphery of the plurality of holes 61b is formed by pressing a convex portion 61a protruding to the side in contact with the first beam. Has become. The convex portion 61a is fitted into a concave portion 1a formed on the end surface of the first beam 1, and has a concave shape on the back side of a portion where the convex portion 61a protrudes. The head of the bolt 35 for fixing is accommodated.
The overhang plate portion 62 is provided with a plurality of holes 63 through which the pins 26 for connecting the beam receiving hardware 34 and the second beam 2 are inserted.

As shown in FIG. 4, the beam receiving hardware 34 is fixed to the first beam 1 by a bolt 35 whose tip is screwed into a bolt hole 47 formed in the first vertical screw member 15. The bolt 35 is inserted into a hole 61b formed in the substrate portion 61, and is screwed from a hole 1b formed in the first beam 1 into a bolt hole 47 of a first vertical screw member, and the beam receiving hardware 34 is moved. It is to be fastened to the end face of the first beam.
In the present embodiment, two beam receiving hardwares 34 shown in FIG. 9 are arranged vertically.

  On the other hand, in the second beam 2, as shown in FIG. 5, the second longitudinal screw member 25 screwed into the second beam 2 and the two side surfaces in the range from the upper cutout to the lower cutout at the end. Two slits 2c are formed between them. These slits 2 c are formed in parallel with the side surfaces of the second beam 2, and their positions correspond to the distance between the two overhanging plate portions 62 of the beam receiving hardware 34. At the end of the second beam 2, a plurality of pin holes 2d extending from one side surface to the other side surface are formed. These pin holes 2 d correspond to the positions of the through holes 48 of the second vertical screw member 25 screwed into the second beam 2.

The overhang plate portion 62 of the beam receiving hardware 34 is inserted into a slit 2 c formed in the second beam 2, and the plurality of pins 26 inserted from one side surface of the second beam 2 receive the beam 26. It is inserted through a hole 63 provided in the overhanging plate portion 62 of the hardware 34 and a through hole 48 of the second vertical screw member 25. As a result, the second beam 2 is joined to the first beam 1 via the beam receiving hardware 34.
The pin 26 corresponds to the beam receiving connecting member of the present invention. The number of these pins can be appropriately determined in consideration of the magnitude of the shearing force acting on the joint portion, and is provided at at least one position. Further, it is desirable to use these pins at positions near the upper surface or the lower surface of the second beam 2.

By providing the bending transmission mechanism and the shear transmission mechanism at the joint of the two beams that join, the ends of the two beams to be joined tend to crack, but a long screw is used to suppress this. 10 and 11 are views showing the position of a long screw screwed into the first beam 1, FIG. 10 is a view taken along the line AA shown in FIG. 2, and FIG. It is sectional drawing in the BB line shown in FIG.
The first and second upper screw members and the first and second lower screw members constituting the bending transmission mechanism are arranged in the axial direction near the upper surface or the lower surface of the beam, respectively. In addition, cracks tend to occur in the direction along the grain of the beam. In order to suppress this, a longitudinally long screw 18 is screwed into the first beam 1 between the first upper screw member 11 and both side surfaces downward from the upper surface, as shown in FIG. . These longitudinally elongated screws 18 have their tips passing through the side of the first upper screw member 11 and reach a position below the first upper screw member 11. Similarly, longitudinally long screws 18 are screwed upward from the lower surface of the first beam 1 on both sides of the first lower screw member 12, and the tip is located above the first lower screw member 12. Position has been reached.
Further, as shown in FIGS. 2 and 3, the longitudinal long screw 28 is screwed into the second beam 2 on both sides of the second upper screw member 21 from the upper surface of the second beam 2 downward. I have. In addition, longitudinally long screws 18 are screwed into the both sides of the second lower screw member 22 upward from the lower surface of the second beam 2 until the leading ends reach above the second lower screw member 22. .

  On the other hand, as shown in FIG. 10, a first long transverse screw 19a is screwed into the first beam 1 near the upper surface of the first beam 1 from one side to the other side. . As shown in FIG. 2, the first long screw 19 a is screwed between the first vertical cutting hole 17 and the end face, and the tip passes through the side of the first vertical screw member 15. To the other side. Since the first vertical cutting holes 17 are formed so as to intersect with the first upper cutting holes 13, it is possible to suppress the occurrence of vertical cracks near the upper surface.

  Further, a second long screw 19b is screwed below the first long screw 19a as shown in FIGS. The second long screw 19b is screwed between the first vertical screw member 15 screwed into the first beam 1 and the end face of the first beam 1 as shown in FIG. . Then, similarly to the first long screw 19a in the horizontal direction, the screw is screwed from one side surface to the other side surface, and the tip reaches a position passing the side of the first vertical screw member 15. The second laterally long screw 19b suppresses the occurrence of a vertical crack due to a bending moment at the end of the first beam 1. That is, when a bending moment acts on the joint between the two beams 1 and 2, a force acts to pull out the first longitudinal screw member 15 from the beam receiving hardware 34 to the end face side, and the crack caused by this force is generated. It is to try to prevent.

The first lateral long screw 19a and the second lateral long screw 19b are similarly screwed into the lower portion of the first beam 1 as shown in FIG. Is screwed between the lower surface of the first beam 1 and the first lower screw member 12, and the second long screw 19 b is screwed between the lower portion of the first vertical screw member 15 and the end face.
In this embodiment, the second beam 2 is not provided with a long screw in the lateral direction. This is because, in the second beam, the second upper cutting hole 23 or the second lower cutting hole 24 does not intersect with the second vertical cutting hole 27, and the second vertical screw member 25 has The fact that the plurality of pins 26 inserted from the side surfaces of the second beam 2 penetrate has a greater resistance to vertical cracks than the first beam 1. However, if necessary, a laterally long screw can be used for the second beam 2.
Further, the numbers of the longitudinally long screws and the laterally long screws screwed into the first beam 1 and the second beam and the screwing positions are not limited to the above-described embodiment, but can be set appropriately.

  Further, as shown in FIG. 4, a pin 16 is inserted into a pin hole 1d formed from one side to the other side of the first beam 1 as shown in FIG. It is inserted through a through hole 48 provided in the screw member 15. This pin 16 is provided on both sides of the first longitudinal screw member 15 when a force is applied to pull out the first longitudinal screw member 15 to the end face side by a bending moment acting on the joint of the two beams. The overhanging portion abuts the wood material of the first beam 1 and resists the above-mentioned force acting on the first longitudinal screw member 15. This has the effect of suppressing the occurrence of a vertical crack at the end of the first beam. The number, position, and the like of the pins 16 can be arbitrarily determined in consideration of the sectional force acting on the joint between the two beams, but the position near the upper surface of the first beam 1 can be determined. Alternatively, it is desirable to provide it at a position near the lower surface.

The joining of the two beams by the joining structure of the beams can be performed as follows.
First, the ends of the first beam 1 and the second beam 2 to be joined are processed. A first upper cutting hole 13, a first lower cutting hole 14, and a first vertical cutting hole 17 are formed in the first beam 1, and a helical bulge of a screw member is fitted therein. Cut the groove. Then, a concave portion 1a on the end face, a hole 1b communicating with the first longitudinal cutting hole 17 from inside the concave portion, and a pin hole 1d for inserting a pin from the side surface are formed.
The first vertical screw member 15 is screwed before the first upper screw member 11 when screwing from the upper surface, and is screwed from the upper surface to a position where the entire length passes through the first upper cutting hole 13. The first lower screw member 12 can be screwed before or after the first longitudinal screw member 15 is screwed. When screwing the first vertical screw member 15 from the lower surface, the screw is screwed before the first lower screw member 12 is screwed.

  Thereafter, as shown in FIG. 4, the beam receiving hardware 34 is fixed to the end face of the first beam 1 by a bolt whose tip is screwed into a bolt hole 47 of the first vertical screw member 11. Further, the lower connecting member 32 is fixed to a lower portion of the end face of the first beam 1 by a bolt 33 screwed into a bolt hole 43 formed in the end face of the first lower screw member 12.

  On the other hand, as shown in FIG. 5, the second beam 2 has notches 2a and 2b at the upper and lower ends, and also has two slits 2c. Further, a pin hole 2d for inserting the pin 26 from the side is formed. Then, a second upper cutting hole 23, a second lower cutting hole 24, and a second vertical cutting hole 27 are formed, and the second upper screw member 21, the second lower screw member 22, and the second vertical screw hole 22 are formed. The direction screw member 25 is screwed. The upper connection member 31 is fixed to the second upper screw member 21 by a bolt 33 screwed into a bolt hole 43 formed on the end surface. In the pin hole 2d drilled from one side to the other side, a pin is inserted only into the uppermost pin hole.

  The second beam 2 to which the upper connection member 31 is fixed is supported above the first beam 1 to which the beam receiving hardware 34 and the lower connection member 32 are fixed as shown in FIG. The second beam 2 is lowered by aligning the position of the end surface of the second beam 2 immediately above the end surface of the second beam 2. The overhanging plate portion 62 of the beam receiving hardware 34 fixed to the first beam 1 is housed in a slit 2c formed in the second beam 2, and the uppermost pin hole 2d from the side surface of the second beam 2 The pin 26 inserted into the overhang is locked by a pin receiving portion 64 provided on the upper portion of the overhang plate portion. The second beam 2 is temporarily supported by the pins 26 in a state where the axis is aligned with the first beam 1. After that, a plurality of pins 26 are inserted from the side surfaces of the second beam 2 to connect the beam receiving hardware 34 and the second beam 2, and the upper connecting member 31 fixed to the second upper screw member 21 is bolted. 33 couples with the first upper screw member 11. In addition, the lower connecting member 32 fixed to the first lower screw member 12 is connected to the second lower screw member 22 by a bolt, thereby completing the joining of the two beams.

In such a beam joining structure, from the first upper screw member 11 screwed into the first beam 1 to the second upper screw member 21 screwed into the second beam 2 via the upper connecting member 31. The axial tensile or compressive force of both beams is transmitted. Similarly, a tensile force or a compression force is applied from the first lower screw member 12 screwed to the first beam 1 to the second lower screw member 22 screwed to the second beam 2 via the lower connecting member 32. Power is transmitted. Thereby, a bending moment is transmitted between both beams. Then, the shearing force is transmitted from the first vertical screw member 15 screwed into the first beam 1 to the second vertical screw member 25 screwed into the second beam 2 via the beam receiving hardware 34. You.
In addition, the first beam 1 and the second beam are screwed by longitudinal long screws 18 and 28 screwed from the upper and lower surfaces of the first beam 1 and lateral long screws 19a and 19b screwed from the side surfaces of the first beam. Cracking at the end of the second beam is suppressed.

FIG. 11 is a side view showing a beam joint structure according to another embodiment of the present invention.
In this joint structure, a first upper screw member 71, a first lower screw member 72, a second upper screw member 81, and a second lower screw member which are the same as those used in the joint structure shown in FIGS. The screw member 82, the upper connecting member 91, and the lower connecting member 92 are used. Then, the second screw 4 screwed into the second beam 4 from the first upper screw member 71 and the first lower screw member 72 screwed into the first beam 3 via the upper connecting member 91 and the lower connecting member 92. A tensile force or a compressive force is transmitted to the upper screw member 81 and the second lower screw member 82. Further, the first vertical screw member 73 screwed into the first beam 3 and the second vertical screw member 83 screwed into the second beam 4 are also the same as the joint structure shown in FIGS. Is used to transmit the shearing force between the first beam 3 and the second beam 4 via the beam receiving hardware 93.

  On the other hand, in this joint structure, both the first beam 3 and the second beam 4 are provided with cutouts at the corner between the upper surface and the end surface and at the corner between the lower surface and the end surface. The first upper screw member 71, the first lower screw member 72, the second upper screw member 81, and the second lower screw member 82 are each formed from the first beam 3 or the second beam 3 from the vertical plane in the notch. The beam 4 is screwed in the axial direction. Therefore, when the first beam 3 and the second beam 4 are joined so that their end faces abut each other, the upper connecting member 91 and the lower connecting member 92 are arranged over the cutouts provided on both sides. It has become.

As the notch is provided at the end of the first beam 3, the first vertical cutting hole 76 is formed at a position farther from the end face than the axial dimension of the notch. The first vertical cutting hole 76 intersects the first upper cutting hole 74 and the first lower cutting hole 75, and the first vertical screw member 73 is connected to the first upper screw member 71 or The first lower screw member 72 is screwed in advance.
Similarly, in the second beam 4, the second vertical cutting hole 86 is formed at a position farther from the end face than the axial size of the notch, and the second upper cutting hole 84 and the second lower cutting hole 86 are formed. Crosses with hole 85. Therefore, the second vertical screw member 83 is screwed prior to the second upper screw member 81 or the second lower screw member 82.

The beam receiving hardware 93 is fixed to the first beam 3 and connected to the second beam 4 in the same manner as in the joining structure shown in FIGS. 2 and 3. However, the bolts 94 for fixing the beam receiving hardware 93 are shown in FIG. 2 corresponding to the fact that the first vertical screw member 73 and the second vertical screw member 83 are screwed into positions away from the end faces. It is longer than that used in the joint structure, and the overhang length of the overhang plate portion of the beam receiving hardware 93 is also large.
The longitudinal long screws 77 and 87 are used in the same manner as the joint structure shown in FIGS. 2 and 3, and the lateral long screws 78 and 88 are used not only in the first beam 3 but also in the second beam 4. In addition, cracking of the wooden material constituting the beam is suppressed.

  Even in such a joint structure of beams, a bending moment and a shear force are transmitted between both beams to be joined, and cracks of the wood material constituting both beams are effectively suppressed.

  The joint structure of the beams described above is an embodiment of the present invention, and the present invention is not limited to the above embodiment, and the dimensions, shape, number, etc. of the members may be appropriately adjusted within the scope of the present invention. It can be changed and implemented.

1: 1st beam, 1a: concave portion, 1b: hole into which bolt for fixing beam receiving hardware is inserted, 1d: pin hole, 2: second beam, 2a: upper cutout, 2b: lower cutout Chip, 2c: slit, 2d: pin hole, 3: first beam, 4: second beam,
11: first upper screw member, 12: first lower screw member, 13: first upper cutting hole, 14: first lower cutting hole, 15: first longitudinal screw member, 16: pin, 17: first longitudinal cutting hole, 18: longitudinal long screw, 19a: first lateral long screw, 19b: second lateral long screw,
21: second upper screw member, 22: second lower screw member, 23: second upper cutting hole, 24: second lower cutting hole, 25: second vertical screw member, 26: pin, 27: second longitudinal cutting hole, 28: longitudinal long screw,
31: Upper connecting member, 32: Lower connecting member, 33: Bolt, 34: Beam receiving hardware, 35: Bolt,, 36: Connecting member,
41: Metal rod-shaped member, 42: Spiral projection, 43: Bolt hole, 44: Groove, 45: Metal rod, 46: Spiral projection, 47: Bolt hole, 48: Through hole , 49: groove,
51, 52: end plate portions of the connecting member, 51a, 52a: through holes provided in the end plate portion, 53: side plate portion of the connecting member, 54: end plate portion, 54a: through hole into which the eccentric washer is fitted, 55: eccentric washer, 55a: long hole,
61: substrate portion, 61a: convex portion provided on the substrate portion, 61b: hole for inserting a bolt, 62: overhang plate portion, 63: hole for inserting a pin, 64: pin receiving portion,
71: a first upper screw member, 72: a first lower screw member, 73: a first longitudinal screw member, 74: a first upper cutting hole, 75: a first lower cutting hole, 76: a first lower cutting hole 1 vertical cutting hole 77: vertical long screw, 78: horizontal long screw,
81: second upper screw member, 82: second lower screw member, 83: second longitudinal screw member, 84: second upper cutting hole, 85: second lower cutting hole, 86 :, second 2, vertical cut holes, 87: vertical long screw, 88: horizontal long screw,
91: upper connecting member, 92: lower connecting member, 93: beam receiving hardware, 94: bolt

Claims (6)

A beam joining structure in which an end face of a first beam made of a wood material and an end face of a second beam made of a wood material are opposed to each other and joined,
A first upper screw member screwed into a first upper cutting hole and a first lower cutting hole provided in an axial direction of the first beam from an upper portion and a lower portion of an end surface of the first beam; A lower screw member of
A second upper screw member screwed into a second upper cutting hole and a second lower cutting hole provided in an axial direction of the second beam from an upper portion and a lower portion of an end surface of the second beam; A lower screw member of
A first longitudinal screw member screwed into a first longitudinal cutting hole provided in an up-down direction at an end of the first beam;
The first beam is inserted into a hole provided from the end face of the first beam toward the first vertical screw member, and is screwed into a bolt hole provided on a side surface of the first vertical screw member. A beam receiving member fixed to the end face of the beam,
An upper connecting member that couples the first upper screw member and the second upper screw member;
A lower connecting member that couples the first lower screw member and the second lower screw member;
A beam receiving connecting member that connects the beam receiving member and an end of the second beam,
The first longitudinal cutting hole is provided so as to cross and communicate with at least one of the first upper cutting hole or the first lower cutting hole,
The first longitudinal screw member is screwed into the first longitudinal cutting hole from an upper surface or a lower surface of a first beam, and the first upper cutting member intersects the entire length of the first longitudinal screw member. A beam joint structure screwed into a hole or a position passing through a first lower cutting hole. On the upper side of the first upper screw member or the lower side of the first lower screw member, from one side of the first beam toward the other side, the upper side of the first upper screw member or A laterally long screw is screwed up to a position where the tip passes under the first lower screw member,
From the upper surface or the lower surface of the first beam, a longitudinally long screw is screwed up to a position where the tip passes vertically on both sides of the first upper screw member or the first lower screw member,
2. The long screw in the lateral direction and the long screw in the longitudinal direction are screwed around three sides around the first upper screw member or the first lower screw member. Beam joint structure.   Between the first longitudinal screw member and the end surface of the first beam, from one side of the first beam toward the other side, the side of the first longitudinal screw member is The beam joining structure according to claim 1 or 2, wherein the second long screw in the lateral direction is screwed into a position where the tip passes. The first vertical screw member has a through hole formed in a direction perpendicular to the axis from the side surface,
A pin is inserted into a pin hole formed in at least one place from one side surface to the other side surface of the first beam, and the pin is inserted into the through hole formed in the first vertical screw member. The beam joining structure according to any one of claims 1 to 3, wherein the beam is inserted. The second beam is provided with a notch at a corner between an end surface and an upper surface joined to the first beam and at a corner between the end surface and the lower surface,
The upper connecting member and the lower connecting member are arranged in the notch,
A second vertical screw member is screwed into a second vertical cutting hole formed from the inside of the notch in the upper part of the second beam to the notch provided in the lower part,
The beam receiving connecting member is inserted into a pin hole formed in at least one place from one side surface to the other side surface of the second beam, and the hole formed in the beam receiving member and the second The beam joining structure according to any one of claims 1 to 4, wherein the pin is a pin inserted into a through hole provided in the vertical screw member. The first beam and the second beam are provided with a notch at a corner portion between an end surface and an upper surface and a corner portion between the end surface and the lower surface which are joined to each other,
The first upper screw member and the first lower screw member, and the second upper screw member and the second lower screw member are configured such that the first beam or the second lower screw member extends from the inside of the notch. It is screwed in the axial direction of the beam,
The first longitudinal screw member is screwed into a position farther from an end face than a range where the notch is provided in the first beam,
In the second beam, a second vertical cutting hole in the vertical direction is formed at a position farther from the end face than the range where the notch of the second beam is provided,
The second longitudinal cutting hole is provided so as to cross and communicate with at least one of the second upper cutting hole or the second lower cutting hole,
A second vertical screw member is screwed into the second vertical cutting hole from an upper surface or a lower surface of a second beam, and the second vertical screw member has the second vertical screw member having the entire length intersecting with the second vertical screw member. Screwed to a position passing through the upper cutting hole or the second lower cutting hole,
The beam receiving connection member is inserted into a pin hole formed from one side surface to the other side surface of the second beam, and a hole formed in the beam receiving member and the second longitudinal screw member are provided. The beam joining structure according to any one of claims 1 to 4, wherein the pin is a pin inserted into a through hole provided in the beam.

Images