JP2000265553A - Joint construction for wooden member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint construction for wooden members using lag screw bolts. SOLUTION: A lag screw bolt 1 is formed with a lag screw thread portion, a hollow hole is formed at the tip portion, and a female thread portion is processed on the peripheral surface. A tensile bolt 10 is formed with male thread portions 12 at both the ends of the shank 11, and one of the male thread portions 12a is screwed to the lag screw blot 1. At the first wooden member 20, a through-hole 22 is formed, a notched portion 23 is formed at the tip, the lag screw bolt 1 is screwed to the second wooden member 30 and fixed, the shank of the tensile bolt 10 is fitted and inserted to a through-hole 22, and the first wooden member and the second wooden member are jointed and fixed when other male thread portion 12b of the tensile bolt 10 projected to the inside of the notched portion 23 is fastened and fixed by tightening the nut 15 through the washer 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for rigidly joining wooden members using a lag screw bolt.

[0002]

2. Description of the Related Art In recent years, studies on a rigid frame structure using a moment resistance joining method have been actively conducted. The term "moment resistance joining" refers to a method of joining members as rigidly as possible for the purpose of transmitting a moment.

[0003] Moment resistance joints are mainly classified into a plurality of basic forms when classified according to the type of force transmission. Among them, a typical example is a gusset plate joint type. The gusset plate joining type is a type in which a moment, a shearing force, and an axial force are simultaneously transmitted by combining a gusset plate such as a steel plate or a plywood with a joining tool such as a nail, a bolt, a lag screw, or a drift pin. In the case of using nails, bolts, and lag screws, the gusset plate is of an auxiliary plate type, whereas in the case of drift pins, the type in which the gusset plate is inserted into a member is basically used.

FIG. 22 shows a joining example (conventional example 1) in which a wooden frame is formed by a recent general gusset plate joining type moment resistance joining. In the first conventional example, a glued laminated material is used for the column member 60 and the beam member 61, and as shown in FIG.
Slits 63, 63 into which the steel plate gusset plate 62 for insertion can be inserted are formed in advance on one side surface of the joint member 0 and the joint end of the beam member 61, respectively. The steel gusset plate 62 has a small hole 65 in which a plurality of drift pins 64 can be inserted in advance. Corresponding to the position of each small hole 65 of the steel plate gusset plate 62, a small through hole 66 is accurately formed in the column member 60 and the beam member 61. Then, the steel sheet gusset plate 62 is inserted into each of the slits 63 of the column member 60 and the beam member 61, and is tightly fixed by a predetermined number of drift pins 64.

When the bending moment acts on the beam member 61, the moment is transmitted by the moment of the beam member 61 → the shear force of the drift pin 64 → the bending of the steel plate gusset plate 62 → the shear force of the drift pin 64 → the column member 60. The stress is transmitted in the form of a moment, and in addition to the bending moment, the shearing force and the axial force are also transmitted through the same path via the shearing force of the drift pin 64, so that the configuration of the stress transmission is relatively reasonable.

[0006] Another typical example of the moment resistance joining is a tension bolt joining type. In the tension bolt joining type, through bolts are inserted into upper and lower positions of a beam end, and a nut is turned to draw and join the beam and the column. Moments and shear forces are transmitted separately. The connector has a configuration that is not particularly used except for the pull bolt.

FIGS. 23 and 24 show a joining example (prior art 2) in the case of forming a wooden ramen frame by a tension bolt joining type moment resistance joining. In the second conventional example, the column member 60 and the pair of beam members 61, 61 include:
Insertion holes 68 for tension bolts 67 at two predetermined positions
Is formed in advance at a predetermined distance from the joint end of the beam member 61, and a notch 69 is provided in the notch 69. 68 are open. In joining, the column member 60 and the pair of beam members 61, 61
A tension bolt 67 is inserted into each of the upper and lower two insertion holes 68, and both ends of each tension bolt 67 are tightened and fixed at the position of the notch 69 via a washer 70. I have.

In the second conventional example, when the bending moment is applied to the beam member 61, the moment is transmitted on the tension side: the material end moment of the beam member 61 → the indentation of the beam side washer 70 → the tensile force of the tension bolt 67 → The stress is transmitted as the moment of the column member 60. On the other hand, on the compression side, stress is transmitted by triangular indentation of the end of the beam member 61 into the side surface of the column member 60. The shear force is transmitted by inserting a shear resistance such as a dowel into the opening of the beam member 61.

[0009] On the other hand, moment-resisting joints, which are currently in practical use, can be applied only to one-way frames in principle. Therefore, in order to extend this to a two-way ramen, it is necessary to consider using it with other types. FIG. 25 to FIG. 27 are conceptual diagrams of a moment resistance joint for a two-way frame based on the gusset plate joint type proposed in principle by the inventor of the present application (conventional example 3). Conventional example 3 is disclosed in
-25828888, and Japanese Patent No. 26534
It is registered as No. 14.

In the conventional example 3, the lag screw bolt 8
Numeral 0 has a configuration having a lag screw thread portion 82 of the shaft portion 81 and a bolt screw portion 83 at the end. The gusset plate 74 is formed in a T-shape by a steel plate, and the T-shaped head plate 75 is provided with a plurality of through holes 76 in which the bolt screw portions 83 of the lag screw bolts 80 are tightened with nuts. A plurality of small holes 79 into which the drift pins 78 are fitted are provided in the T-shaped leg plate 77. The lag screw bolt 80 and the gusset plate 74 have a structure in which the wooden pillar member 60 and the wooden beam member 61 are joined.

That is, at the end of the beam member 61, a slit 72 into which the T-shaped leg plate 77 of the gusset plate 74 is inserted.
And a small through hole 73 corresponding to the small hole 79 of the T-shaped leg plate 77.
And the lag screw bolt 8
The bolts 83 at the ends thereof are screwed in a horizontal direction such that the bolt screw portions 83 at the ends protrude outside. On the other hand, a bolt screw portion 83 protruding outside is passed through a through hole 76 of a T-shaped head plate 75 of the gusset plate 74 and fastened and fixed by tightening a nut 84.
The L-shaped leg plate 77 is inserted into the slit 72 of the beam member 61, and the shear force is transmitted through the small holes 79 of the T-shaped leg plate 77 and the corresponding small through holes 73 of the beam member 61. The structure is such that the drift pins 78 are fitted and fastened and fixed.

According to the third conventional example, a lag screw bolt 80 in which a lag screw thread portion 82 is formed on a shaft portion 81 of a double-cut bolt is screwed into a pre-processed through hole of the wooden column member 60, and The bolt screw portion 83 and the wooden beam member 61 that have come out can be easily and firmly joined to each other by using the T-shaped gusset plate 74 and the drift pin 78.
It is an excellent joint structure with little embedding and little deformation.

[0013]

However, in the conventional example 1, the small holes 6 through which a plurality of drift pins 64 previously drilled in the steel gusset plate 62 can be inserted.
Since the position of the small hole 5 and the position of the small through-hole 66 penetrating through the column member 60 and the beam member 61 corresponding to each small hole 65 do not exactly match, it becomes impossible to join the joints. There has been a problem that extremely high precision is required for the work, processing time is increased, and the cost is high. Further, in the field work, a complicated work of inserting and inserting a large number of drift pins 64 is required.

Further, in the above-mentioned conventional example 2, workability is improved as compared with the above-mentioned conventional example 1. However, in the joint having such a configuration, when a bending moment acts on the beam member 61, the transmission of the moment is reduced on the compression side.
Due to the triangular indentation into the side of the pillar member 60 at the tip of the wood, the rigidity and proof stress are determined depending on the resistance of the wood at the time of the indentation. As described above, it is a fatal defect that the groin surface of the wooden beam member 61 is largely embedded into the side surface of the wooden pillar member 60, and since the wooden member has a low resistance to digging in, the joint structure is expected to have strong proof strength. There was a problem that it was not possible.

Further, the wooden ramen frame of the above-mentioned conventional example 3 uses a steel plate insertion type drift pin joint, and at least 20 drift pins 78 are required at each joint between the column member 60 and the beam member 61. In this respect, there is a problem that the same complicated processing as in the first conventional example is required. The lag screw bolt 80 according to the third conventional example has a lag screw screw portion 82 in which a normal M bolt specification bolt screw portion 83 is machined at both ends or one end of the lag screw screw portion 82 as shown in FIG. The portion 82 is inserted into the column member 60 so that only the bolt screw portion 83 at the end protrudes outside and is coupled to the beam member 61. However, if the ends of the lag screw bolts 80 protrude outside the column member 60, it is difficult to drop the beam member 61 from above at the construction site and incorporate the beam member 61, and there is a problem that a device needs to be devised in the method of building. .

The present invention has solved the above-mentioned conventional problems, and has made it possible to rigidly join wooden members to each other in a joint type having both high construction performance and high strength by using wooden members. It is an object of the present invention to provide a joining structure of a wooden member using a lag screw bolt.

Further, the present invention makes it possible to simultaneously and rigidly join both directions between beams and a girder direction by using a wooden member, and similarly to a steel frame structure or a reinforced concrete structure, not only one direction but also a two-way frame, and It is an object of the present invention to provide a joint structure of a wooden member using a lag screw bolt capable of realizing a three-directional ramen and a four-directional ramen with a wooden structure.

Further, in the present invention, by using a structural material called a structural glue, a role of a final working material is also given to it, and therefore, the cost of the internal finishing is reduced, and a large space with a large degree of freedom is secured. It is an object of the present invention to provide a joining structure of a wooden member using a lag screw bolt capable of being used.

[0019]

According to a first aspect of the present invention, a first wooden member and a second wooden member are joined and fixed using a lag screw bolt and a tension bolt. In the joining structure, the lag screw bolt is formed with a predetermined amount of hollow hole in the shaft portion from the axial end surface of the shaft portion in which the lag screw screw portion is formed toward the center of the shaft portion, and A female screw portion is formed on the peripheral surface of the hole, and the tension bolt has a male screw portion formed at both ends of a shaft portion, and one male screw portion can be screwed to the female screw portion, and is joined. One of the first wood members to be provided has an end face facing the second wood member as a base end,
A through hole having a predetermined length is formed toward the center of the first wood member, and a notch having a predetermined size is formed at the tip of the through hole. The lag screw bolt is screwed and fixed to the second wood member to a position where the lag screw bolt is exposed flush with the surface of the other second wood member to be provided, and the one male screw portion of the tension bolt is
The shaft portion of the tension bolt is screwed and fixed to the female screw portion, the shaft portion of the tension bolt is inserted into the through hole, and the other male screw portion of the tension bolt protruding into the notch portion is tightened with a nut through a washer. The first wood member and the second wood member are joined and fixed by being fastened and fixed by the following. In the invention according to claim 1 having the above configuration, first, the lag screw bolt is screwed and fixed to the second wood member to a position where the lag screw bolt is exposed flush with the surface of the second wood member to be joined. One male screw portion is screwed and fixed to the female screw portion of the lag screw bolt, then the shaft portion of the tension bolt is inserted into the through hole of the first wood member, and the other of the tension bolt projecting into the cutout portion is inserted. By fastening and fixing the male screw portion by means of a nut through a washer, it is possible to easily, firmly and accurately rigidly join the first and second wood members with a simple construction procedure. Thus, an excellent joint structure in which the end of the first wood member is not sunk into the side surface of the second wood member and deformation is small.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the first wood member is a pillar member and the second wood member is a beam member, or the first wood member is a beam member. The wooden member is a beam member, and the second wooden member is a pillar member.

When the first wood member is a pillar member and the second wood member is a beam member, a lag screw bolt is screwed and fixed to the beam member, and the other male screw portion of the tension bolt is washered to the pillar member. , It is fastened and fixed by nut tightening, and a so-called beam-winning joining type is achieved. In this beam-to-beam joining method, the moment transmitted when a bending moment acts on the beam member is as follows: on the tension side, the moment of the beam member → the sliding (pulling out) of the lag screw bolt on the beam member → the tensile force of the tension bolt → Engage the washer on the column side →
The stress is transmitted as the moment at the end of the column member. On the other hand, on the compression side, the end of the column member is recessed into a triangular shape on the side surface of the beam member. Since the shear force is beam-winning,
It is transmitted directly from the beam member to the column member.

The first wooden member is a beam member, and the second wooden member is a second wooden member.
When the wooden member is a pillar member, a lag screw bolt is screwed and fixed to the pillar member, and the other male screw portion of the tension bolt is fastened and fixed to the beam member with a nut through a washer. It will be a winning joint type. In this beam-to-column joining method, the moment transmitted when a bending moment acts on the beam member is as follows: on the tension side, the end moment of the beam member → penetration of the washer on the beam member → pulling force of the tension bolt → lug on the column member The stress is transmitted as the screw bolt slips (pulls out) → moment of the column member. On the other hand, on the compression side, the end of the beam member has a triangular recess into the side surface of the column member. The shear force is transmitted by inserting a shear resistor such as a dowel into the beam end of the beam member.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the female screw portion of the lag screw bolt is provided at one end or both ends of the shaft portion. It is characterized by. In the configuration where the female screw part of the lag screw bolt is provided only on one side of the shaft part,
For example, one beam member is tied and joined to one column member, or as a so-called two-way frame, two beam members are tied orthogonally to one column member. , The form of joining becomes possible. In the configuration in which the female screw portions of the lag screw bolts are provided on both sides of the shaft portion, for example, two beam members are linearly fastened and fixed to one pillar member, Alternatively, a lag screw bolt buried in a column member in one direction is also buried in a direction orthogonal to the lag screw bolt, and the beam member is joined to one column member in three or four directions. It is also possible to realize a so-called three-way frame or a four-way frame.

According to a fourth aspect of the present invention, in addition to the configuration of any one of the first to third aspects, the lag screw bolt and, correspondingly, the tension bolt are connected to the first bolt. It is characterized in that at least one or more pieces are provided and joined and fixed at a joint portion between one wood member and the second wood member. According to the fourth aspect of the invention, the first
When one of the wood members and the second wood member is a column member and the other is a beam member, two lag screw bolts and two corresponding tension bolts are provided at the joint site. Tightening and joining are the most preferable specific examples of the joining type having both high construction performance and high strength.

However, the present invention is not limited to this. Depending on design conditions, one lag screw bolt and one corresponding tensile member may be provided at the joint between the first and second wood members. It is also possible to arrange with bolts and tie and join. Further, as described as the operation of the third aspect of the present invention, for example, a form in which two beam members are linearly fastened and fixed to one column member, or a column member. Two or more lag screw bolts are buried in one direction, and two or more lag screw bolts are also buried in a direction perpendicular to this direction, and one pillar member is beamed in three or four directions. The members can be joined together, so that a so-called three-way frame or a four-way frame can be more specifically realized.

According to a fifth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the first aspect further comprises
The wooden member and the second wooden member are formed of structural glued laminated wood. In this case, for the column member and the beam member as the first and second wood members, for example, glued glue and the like typified by Baymatsu glued glue are used. A so-called engineering wood such as a laminated material (LVL) or PSL can be similarly applied to the present invention. In the present invention, in addition to the configuration of the invention according to any one of claims 1 to 5, the lag screw bolt has a screw root diameter of 25 mm on a shaft portion of a round steel bar having a diameter of 20 to 40 mm. Thread diameter 30mm, pitch 1
A large-diameter lag screw thread having a diameter of 0 mm and an angle of 80.54 degrees may be machined, and one end or both ends of the shaft may be machined with M16 bolts as the female thread. In this case, by providing the large-diameter lag screw thread portion, the width of cutting into the wooden member is increased accordingly, so that the larger the lag screw thread portion is, the higher the pull-out resistance of the lag screw bolt can be set. In order to increase the length of M16 bolts as tension bolts to be screwed into the female screw portion, to increase the shear strength of the glued laminated wood, and to further improve the construction performance and manufacturing performance, This configuration is suitable as a specific example. However, the present invention is not limited to this, and it is possible to perform processing of a lag screw thread portion or thread processing as a female screw portion most suitable for the design condition in accordance with the design condition.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 to 4
1 shows a first embodiment of the present invention. This embodiment uses a lag screw bolt 1 shown in FIGS. 1 to 4 and a tension bolt 10 shown in FIGS. 3 and 4 to form a column member as a first wood member 20 and a second wood member 30. The joining structure which joins and fixes the beam member of FIG.

The lag screw bolt 1 is shown in FIGS.
As shown in FIG. 3, the shaft 3 is formed concentrically with the axis of the shaft 3 from the axial end face 3a of the shaft 3 on which the lag screw thread 2 is formed, toward the center 3b of the shaft 3. A hollow hole 4 having a predetermined dimension is formed therein, and a female screw portion 5 is formed on a peripheral surface of the hollow hole 4. In the present embodiment, the female screw portion 5 of the lag screw bolt 1 is shown in FIGS.
Are provided at one end on one side of the shaft portion 3 as shown in FIG. In the present embodiment, a ring-shaped flange 6 is formed at an end of the shaft 3 where the female screw 5 is machined.

As shown in FIGS. 1 and 2, for example, the lag screw bolt 1 is formed in the shaft portion 3 by shaving SS400 from ordinary steel having a predetermined diameter before machining. Diameter 25mm, screw thread diameter 30mm,
A lag screw thread 2 having a pitch of 10 mm and an angle of 80.54 degrees is machined. However, as a method of manufacturing the lag screw bolt 1, SS
It is not limited to the shaving of 400, and it is needless to say that it may be desirable to manufacture by rolling when assuming a mass production system. In the present embodiment, as an example, the female screw portion 5 is set to have a thread root diameter of 16 mm in diameter, and is configured so that the tension bolt 10 of the M16 bolt specification can be screwed. However, the present invention is not limited to this embodiment, and the lag screw 2
The working dimensions of the internal thread portion 5 and the working dimensions of the female screw portion 5 can be set to the working dimensions most suitable for the design conditions in accordance with the design conditions.

As shown in FIGS. 3 and 4, the tension bolt 10 has a male screw portion 12 formed at both ends of a shaft portion 11, and one male screw portion 12 a can be screwed to the female screw portion 5. Is formed. That is, in the present embodiment, since the female screw portion 5 is machined to a specification dimension of a screw root diameter of 16 mm,
The tension bolt 10 is set to an M16 bolt specification, and one male screw portion 12 a can be screwed into the female screw portion 5. Further, the other male screw portion 12b can be tightened and fixed by a nut 15 via a washer 14 as described later. It is desirable to use a high-tensile bolt as the tension bolt 10, but the present invention is not limited to this, and a normal bolt may be used depending on design conditions.

A through hole 22 having a predetermined length is formed in one pillar member 20 to be joined, with the end face 21 facing the other beam member 30 as a base end, toward the center of the pillar member 20. A notch 23 having a predetermined size is formed at the tip of the through hole 22. That is, one opening end 22a of the through hole 22 formed in advance in the column member 20 is open on the end surface 21 side facing the beam member 30, and the other opening end 22b of the through hole 22 is formed in the notch portion. 23 is opened at a predetermined position.

As shown in FIG. 4, the end surface 21 of the column member 20 is
The beam member 30 has a front hole 4
0 is pre-processed. That is, in this embodiment, the tip hole 40 having a diameter of 25 mm is formed corresponding to the set dimensions of the screw root diameter of the lag screw thread portion 2 of the lag screw bolt 1 and the screw thread diameter of 30 mm. In this embodiment, since two lag screw bolts 1 are arranged at the joint position between the column member 20 and the beam member 30, the two tension bolts 1 are correspondingly provided.
0 and two leading holes 40 are formed. That is, in the present embodiment, the first wood member 20 is a column member, the second wood member 30 is a beam member, and two lag screw bolts 1 and two corresponding tension bolts 10 It can be said that arranging and bonding and joining is the most preferable specific example as a joining method having both high construction performance and high strength, but is not necessarily limited to this.

Further, in this embodiment, the case where the column member 20 as the first wood member and the beam member 30 as the second wood member are formed of structural glued laminated wood is illustrated. In this case, for the column member 20 and the beam member 30, for example, a glued laminated wood typified by a bay pine glued laminated wood is used.
However, the present invention is not limited to this.
So-called engineering woods such as VL) and PSL can be similarly applied to the present invention. Needless to say, it is also possible to use ordinary muk wood. A column member 20 as a first wooden member;
When the beam member 30 as a wood member is formed of a structural glulam, it is a preferred embodiment from the viewpoint of strength that the front holes 40 are formed in the laminating direction and the width direction of the glulam. It is not necessarily limited to this.

In this embodiment having the above configuration,
Hereinafter, a procedure for rigidly joining the column member 20 and the beam member 30 with the lag screw bolt 1 and the tension bolt 10 will be described mainly with reference to FIG. First, the lag screw bolt 1 is screwed and fixed to the beam member 30 to a position where the lag screw bolt 1 is exposed flush with the surface 31 of the beam member 30 as the second wood member to be joined. In this case, two lag screw bolts 1
At the screw-in position of the lag screw screw part 2 of the lag screw bolt 1 has a screw root diameter of 25 mm and a screw thread diameter of 30 m
Since the tip hole 40 having an inner diameter of 25 mm is previously formed and formed in correspondence with the set dimension of m, the lag screw thread portion 2 of the lag screw bolt 1 has a difference dimension of 5 mm from its outer diameter dimension of 30 mm. It is screwed and fixed while biting into the peripheral surface of the front hole 40 by the distance. This is because a sufficient digging force is exerted to improve the pull-out strength, and at the same time, the resistance at the time of screwing is suppressed to a relatively low level to improve the construction performance.
However, dimensions are set in order to prevent bending and screwing when screwing.

The lag screw bolt 1 is connected to the beam member 3.
When fixing the screw to 0, use a lag screw bolt 1
The female screw portion 5 is previously provided with a threading screw dedicated to screwing (not shown, male screw portions are formed at both ends).
And a nut is screwed into the other male screw portion of the cut bolt, an impact wrench (not shown) is fitted to the nut, and a lug is attached to the beam member 30. Screwing and fixing the screw bolt 1 is a preferred embodiment from the viewpoint of improving the construction performance.
It is not necessarily limited to this. That is, for example, if a normal M16 bolt is used, an impact wrench socket may be fitted into the head and screwed into the socket.

Then, the surface 31 of the beam member 30 to be joined
After the lag screw bolt 1 is embedded in the beam member 30 until it is exposed to the same level, the threaded bolt for screwing is removed. This is lag screw bolt 1
It is premised that the screwing and fixing work is to be performed in advance in a place such as a factory other than the construction site, so that one male screw portion 12 of the tension bolt 10 is screwed into the female screw portion 5 of the lag screw bolt 1 during transportation. In this state, the tension bolt 10 projects from the beam member 30, which not only hinders the conveyance, but also may damage the tension bolt 10 itself. At this time, for example, the flange 6 on the female screw portion 5 side of the lag screw bolt 1 is fixed with a pipe wrench (not shown), and a special dimension for screwing is used using a ratchet wrench (not shown). All you have to do is remove the cutting bolt.

The lag screw bolt 1 is connected to the beam member 3.
When fixing the screw to 0, use a lag screw bolt 1
It is also possible to omit in advance screwing a threading bolt dedicated to screwing into the female screw portion 5 of the above, and directly screw one male screw portion 12a of the tension bolt 10 directly. In this way, the two lag screw bolts 1 are screwed into the beam member 30 as the second wood member to a predetermined depth and fixed.

Next, one male screw portion 12a of the tension bolt 10 is screwed to the female screw portion 5 of each lag screw bolt 1. Next, the shaft portion 11 of the tension bolt 10 is inserted so that the other male screw portion 12b is at the head, and the shaft portion 11 is dropped into a pair of through holes 22 formed in advance in the pillar member 20 as the first wooden member. . Then, a nut 15 is attached to the other male screw portion 12b of the tension bolt 10 protruding into the notch portion 23 via a washer 14 as shown in the drawing, and the tension bolt 10 is formed using a ratchet wrench or the like.
By firmly tightening the nut 15 and the
0 and the beam member 30 are firmly connected and fixed. Therefore,
The notch 23 is set and machined in advance to a size having a space that allows the above-described tightening operation.

In this embodiment, the pair of front holes 40 are formed in the beam member 30, the pair of through holes 22 are formed in the column member 20, and the pair of notches 23 are formed. Further, the work up to the screwing of the lag screw bolt 1 into the pair of front holes 40 is performed in advance at a factory other than the construction site. At the construction site, one male screw portion 12 of the tension bolt 10 is screwed into the female screw portion 5 of the pair of lag screw bolts 1, and a washer 14 is attached to the other male screw portion 12 b of the tension bolt 10. It can be done on site because it is only necessary to install the nut 15 via the nut and tighten and fix the tension bolt 10 and the nut 15, but it is also possible to perform these processing and work in a factory etc. before carrying in the site in advance Rather, this allows these processes to be performed with extremely high accuracy.

If the above-mentioned processing and each of the above-mentioned operations are carried out in advance at a factory or the like before being carried into the site, the operation at the construction site will be performed with the other male screw portion 12b of the tension bolt 10 at the top and the column member Only the operation of inserting the tension bolt 10 into the pair of through holes 22, 22 that have been processed in advance and the operation of firmly tightening the other male screw portion 12 b of the tension bolt 10 with the nut 15 via the washer 14. Becomes Therefore, the column member 20 as the first wooden member and the beam member 30 as the second wooden member can be rigidly joined easily, firmly and accurately with a very simple construction procedure. An excellent joint structure with less deformation of the 20 end without being entangled into the side surface of the beam member 30 is obtained.

In this embodiment, the first wood member 20 is a pillar member and the second wood member 30 is a beam member.
The lag screw bolt 1 is screwed into the beam member 30 and fixed, and the other male screw portion 12 of the tension bolt 10 is
b is firmly fastened and fixed by a nut 15 via a washer 14, so that a so-called beam-to-beam joining method is achieved. In this beam-to-beam joining method, when a bending moment acts on the beam member 30, the moment is transmitted on the tension side: the moment of the beam member 30 → the sliding (pulling) of the beam member 30 side lag screw bolt 1 → the tension bolt. The stress is transmitted as the tensile force of 10 → the sink of the washer 14 on the side of the column member 20 → the moment at the end of the column member 20. On the other hand, on the compression side,
The triangular shape of the end of the pillar member 20 is inserted into the side surface of the beam member 30.

From the experimental results described below,
In the so-called beam-winning joining method, the column member 2 on the compression side
The maximum strength is not determined by the triangular indentation of the zero end into the side surface of the beam member 30, but the pullout strength of the lag screw bolt 1 embedded in the beam member 30 or the shear strength of the laminated wood by the tension bolt Will determine the strength of the joint.

Therefore, in the present embodiment, there is no possibility that the problem as in the first conventional example will occur. That is, the positions of the small holes 55 into which a plurality of drift pins 54 pre-drilled in the steel sheet gusset plate 52 can be inserted and inserted, and the through-holes drilled in the column member 50 and the beam member 51 corresponding to each small hole 55. If the position of the small through hole 56 does not match exactly, it is impossible to join the joints. Therefore, extremely high precision is required for the machining work before joining, the machining time is increased, and the cost is high. No such problem arises. Also, in the field work, the complicated work of inserting and inserting a large number of drift pins 54 is completely unnecessary, and the problem of poor field workability can be solved.

Further, as in the above-mentioned conventional example 2, the beam member 51 is provided.
Since the strength of the joining portion is not determined by the cut-in of the wood opening into the side surface of the column member 50, the joining structure is extremely rational in structure.

Further, there is no possibility that the problem in the above-mentioned conventional example 3 will occur. That is, in the wooden ramen frame of the conventional example 3, the steel plate insertion type drift pin joint is used, and the joint portion between the column member 80 and the beam member 81 requires at least 20 drift pins 78, In this regard, Conventional Example 3 had a problem that the same complicated processing as in Conventional Example 1 was required, but in this embodiment,
Such a problem does not occur at all, as in the case of comparison with the above-mentioned conventional example 1. Further, in the above-described conventional example 3, since the end of the lag screw bolt 70 protrudes outside the column member 80, it is difficult to drop the beam member 81 from above at the construction site and incorporate the beam member 81. However, in the present embodiment,
Since the lag screw bolt 1 is completely embedded in the beam member 30, there is no room for such a problem to occur.

1. Pull-out Strength Test of Lag Screw Bolt 1.1 Basic Concept of Lag Screw Bolt FIGS. 1 and 2 show the lag screw bolt 1 tested.
The structure and details are shown. Lag screw bolt 1
Is set on the shaft 3 having a thread diameter of 30 mm and a screw root diameter of 25 mm.
A lag screw thread portion having a pitch of 0 mm and an inclination angle of 80.54 degrees is formed, and an internal thread portion 5 corresponding to an M16 bolt is machined inside an end surface of the shaft portion 3 to be screwed with a high tension bolt of M16 / F10T. It is possible to do it. The lag screw bolt 1 shown in FIGS. 1 and 2 is for experimental use only, and has not been determined yet. The tip hole into which the lag screw 1 is screwed is tentatively set to an inner diameter of 25 mm for experimental use. The dimensions are calculated so that the screwing operation of the lag screw bolt 1 can be easily performed, and that the lag screw bolt 1 is screwed in without being bent during the screwing operation of the lag screw bolt 1. It is not yet clear whether the conditions are optimal. Therefore, further experiments are underway to find optimal conditions. By using an electric torque wrench, the lag screw bolt 1 having a total length of 280 mm is screwed in a direction perpendicular to the fiber direction of the laminated wood.

2.1 Glued Lumber for Test A glulam for bay pine structure was used as a wooden member. Table 1
Shows the basic materials of the laminated test pieces. 2.2 Setup of pull-out test The lag screw bolt 1 for test was produced by Asahi Tec Corporation among the applicants of the present application. The material is created from ordinary steel based on basic data. FIGS. 1 and 2 show the finally determined shapes, dimensions, and the like. A drill hole 25 mm in diameter for woodworking is used to open a hole 40 having a predetermined depth in the direction of lamination of the glued laminated wood, and an M16 bolt is attached to the female screw portion 5 of the lag screw bolt 1. Embedded. After the lag screw bolt 1 is embedded to a predetermined depth, it is necessary to remove the dedicated M16 bolt attached to the female screw portion 5 this time. The non-threaded ring-shaped flange portion 6 at the base end of the lag screw bolt 1 was fixed with a pipe wrench, and the M16 bolt was removed using a ratchet wrench. In the pull-out test, a test device 43 as shown in FIG. 5 was set in a reaction force frame combining an H-shaped steel column 41 and an anchor fixing table 42 installed on the first floor of the wooden hall of the Institute of Wood Science, Kyoto University. Carried out. 30 to push
The pull-out load was measured by a load cell 45 having a capacity of 20 tonf, using an oil jack 44 having a capacity of nf and a pull of 15 tonf. 6 and 7 show details of the pulling displacement measuring method. As is apparent from the figure, a high-precision displacement meter (CDP-100) is attached to the head of a high-tension M16 bolt (tensile bolt) 10 attached to the tip of the lag screw bolt 1.
46 was set, and the amount of drawing was measured. The individual specimens (laminate timber blocks) 47 were obtained by cutting a glulam beam having a total length of 6000 mm into a length of about 1000 mm.
Drill about 8 holes at different points of each glulam beam,
It was repeatedly used by embedding one lag screw bolt 1 in each hole. In addition, since only a limited number of lag screw bolts 1 were prepared, an experiment was performed using one lag screw bolt 1 basically repeatedly several times. As shown in FIGS. 6 and 7, a pull-out test was performed by applying the glued laminated wood block 47 to the reaction table 48. The embedding length L0 was started from about 50 mm, and was increased to a maximum of 280 mm so as to obtain almost continuous data.

3. 3. Results and Discussion 3.1 Tables 2 and 3 show data of pull-out test results of almost all the specimens. In total, 45 pull-out tests were performed, but at the beginning of the experiment, no high tension bolts were used,
Four of these tests failed. Data from this failed trial was excluded from the data analysis. 3.2 Maximum pulling load (Pmax) and embedding length (Lo)
Fig. 8 shows the maximum pulling load (Pmax) and the embedding length (Lo).
Shows the relationship. The regression equation obtained between the maximum drawing load (Pmax) and the embedding length (Lo) is as shown in equation (1). Equation (1)... Pmax = 41.63 (Lo) Based on this regression equation, the relationship between the maximum pulling load per unit length (Pmax / Lo) and the embedding length (Lo) is obtained as 2) is obtained. Equation (2) ... Pmax / Lo = 41.63 (Kgf / mm) 3.3 Relationship between slip coefficient (Ks) and embedded length (Lo) FIG. 9 shows the slip coefficient (Ks) and embedded length. The relationship of the degree (Lo) is shown. The regression equation obtained between the slip coefficient (Ks) and the embedding length (Lo) is as shown in equation (3). Equation (3) ... Ks = 25.15LO + 7603.6
(Kgf / cm)

5. Test of beam-column moment resistance connection As one of the practical applications of the lag screw bolt 1, a preliminary test of an L-shaped beam-column moment resistance connection composed of only the lag screw bolt 1 and the ordinary bolt 10 was performed. . As schematically shown in FIGS. 3 and 4 above, a test on a beam-column moment resistance joint structure using an L-shaped bay pine structural laminated wood was performed as part of the present study.

5.1 Test Glued Lumber As a test piece for L-beam-column moment resistance bonding, three wooden members made of glued lumber for Baymatsu structure were prepared and used. Table 4 shows the characteristics of the laminated test pieces. Each of these long test specimens was cut into two pieces, and a structural test of the beam-column joint was performed. Specimens of three L-beam-column moment resistance joints were produced at the Institute of Wood Science, Kyoto University. 5.2 Joiner Regarding the lag screw bolt 1, the one used in the above pull-out test was reused. Thus, some of them may have suffered unexpected damage at the tip of the female thread. The experiment was performed using a high-tension bolt as the M16 ordinary bolt.

5.3 Test Setup FIGS. 10 and 11 show an L-shaped beam-column moment resistance joint structure.
It shows the test setup status of the
The test was performed by repeating shrinking and tensioning. In FIG.
In addition, the joint part of the glued laminated timber column 20 and the glued laminated timber beam 30
This is a so-called beam-winning joining method, as shown in FIGS.
The configuration is the same as that of the first embodiment. Column member 2
0 and both ends of the beam member opposite to the joint are made of steel, respectively.
Placed on the reaction frame 42 via the roller 50
And both ends can be rotated by pins 49
Is supported on the pin 49 joint of the beam member 30.
Is a high-precision displacement through a load cell 45 of 20 tonf capacity.
(CDP-100). These devices
Are the same as those used in the pullout strength test described above.
You. 5.4 Conclusion on moment and rotation angle The moment acting on the center position of a pair of lag screw bolts
The following regression equation (4) is used for the statement M. Equation (4)... M = P. e The rotation angle θ is as shown in Expression (5). Equation (5)... Θ = (# 3- # 2) / h₂₃  Here, P is the load (Kgf) e is the moment arm (= 1022 mm) # 3 and # 2 are measured by the displacement measuring device shown in FIG.
The relative displacement h₂₃Is the interval between # 3 and # 2. 5.4 Loading period The periodic load is controlled by the rotation angle. Basic
Experimental observation records are 1/300, 1/120, 1/60 and 1/30 radians.
Made in

6. Experimental Results and Discussion 6.1 Relationship between M and θ The moment M measured in the moment resistance joint
The relationship with the rotation angle θ has a predetermined correlation. 6.2 Unsuccessful experiment and its consideration No.1 The specimen failed in the experiment. This
In the test specimen of No. 1, a disk-shaped washer with a diameter of 50 mm
Used to join the bolts to the columns. Bearing range
Washer was excessively embedded in glulam due to slight inadequacy
This seems to have caused the column to split. No.1
The maximum load (+ Pmax) on the test specimen is 1369 kgf,
Since the arm is 102 cm and 2 cm,
The maximum positive moment (+ Mmax) is given by equation (5).
is there. Formula (5) + Mmax = 1369 kgf × 102.2 cm = 139912 kgfcm Therefore, M16 bolt and / or lag screw bolt
The axial force (+ Tmax) supported by is as shown in equation (6).
You. + Tmax = Mmax / g = 8230 kgf From this, the maximum compressive stress applied to the washer (+ σc
 ) Is as shown in equation (7). Formula (7) · + σc = Tmax / A = 8230 / 3.14 × tkgf / cm²  = 419tkgf / cm²  Therefore, this value is slightly larger than the maximum compressive force of softwood.
And the observed failure is understandable. No.2 specimen and N
o.3 specimens are 50x5 to prevent compression failure of the glulam.
A thick washer of 0x5 mm was used. However, No.2 trial
In the specimen, a fragile shear failure occurs along the shear line.
I did The maximum pressing load (+ Pmax) of the No. 2 specimen is 1
616 kgf, and thus the maximum positive moment (+ M
max) is as in equation (8). Formula (8) · + Mmax = 1616 kgf × 102.2 cm = 165155 kgfcm And M16 bolt and / or lag screw bolt
The axial force (+ Tmax) that is supported by is expressed by the following equation (9).
Become like Equation (9)... + Tmax = Mmax / g = 9715 kgf As a result, an effect is exerted on the shaded areas in FIGS.
The maximum shearing force (π) was as shown in equation (10).
You. Equation (10): π_s = Tmax / (2h_s+ B_s) L_s  = 9715 / (2 × 7.5 + 5) 17 = 29 kgf / cm²  The value of the shear force in equation (10) is an average value,
Considering the effect, this average shear force
This is enough to cause a sudden split. No.3 specimen
In the case of, the maximum pressing load (+ Pmax) reaches 934kgf
At that point, suddenly from the female thread of the lag screw bolt
Splitting occurred. The load at which the failure occurred is lower than the expected value.
It was much smaller. As the reason for this sudden trouble
To the lag screw bolt that has been used repeatedly
During the testing, some potential
The image seems to have occurred. Final failure of No. 3 specimen
Successful condition is negative maximum pull-out load (-Pmax) = 16
It occurs at the time of 03 kgf and is the same as in the case of No. 2 specimen.
It is probable that a phenomenon occurred.

7. Conclusion The basic pull-out capacity of lag screw bolts has been determined by this study to be worthy of a certain evaluation. The maximum pull-out strength per lag screw bolt with a screw thread diameter of 30 mm for each embedding depth is about 42 kgf / mm
Met. On the other hand, the slip coefficient (Ks) had little correlation with the embedding depth. Also, L-shaped beams
A tentative test was conducted to apply a lag screw bolt to a moment resistance joint using glued laminated lumber by using a test piece at the column joint. Although the test results were not good, it is considered that at least the direction for further research and development was indicated. That is, from the above results, it was proved that the use of the above-mentioned joint structure enables easy construction at the construction site, and also achieves a joint structure between the wooden members having high strength and tenacity with little initial deformation. .

Next, FIG. 14 shows a second embodiment of the present invention. In the present embodiment, a configuration in which the first wood member is the beam member 30 and the second wood member is the column member 20 is illustrated. Therefore, it is a so-called pillar-winning joining type. That is, in this embodiment, two front holes 40 are formed in the column member 20 side, and the lag screw bolts 1 and 1 are screwed into the front holes 40, respectively. The screw part 5 has a tension bolt 10
One of the male screw portions 12a is screwed together, and the other male screw portion 12b of the tension bolt 10 is fastened and fixed to the beam member 30 via the washer 14 with the nut 15 tightened. A pair of through holes 2 for tension bolts 10
2 is formed, and a pair of notches 23 is formed such that an opening end of the through hole 22 on the center side of the beam member 30 faces a notch 23 having a predetermined size.

In the column-joining method, when a bending moment is applied to the beam member 30, the moment is transmitted from the material end moment of the beam member 30 to the tension side of the beam member 30 → the washer 14 on the beam member 30 → the tension bolt 10. Of the lag screw bolt 1 on the side of the column member 20 (pull-out) → stress is transmitted as a moment of the column member 20. On the other hand, on the compression side, the end of the beam member 30 has a triangular recess into the side surface of the column member 20. Note that the shear force is
Such a shear resistance is transmitted by inserting the shear resistance such as at a substantially neutral axis position at the joint between the column member 20 and the beam member 30. In the second embodiment, the configuration requirements are increased as compared with the first embodiment by the extra dowels 51 for transmitting the shearing force, but the stress transmission surface is similar to that of the first embodiment. It is a joint structure that can rigidly join wooden members with each other in a joint form that has both high construction performance and high strength.

FIG. 15 shows a third embodiment of the present invention. This embodiment exemplifies a case where a two-way rigid frame is formed by a so-called pillar-joining type. That is, in the present embodiment, as in the second embodiment, the first
The wooden member is the beam member 30, and the second wooden member is the column member 2.
0, but one column member 20
2 illustrates a case in which a two-way rigid frame structure in which two beam members 30, 30 orthogonal to each other are rigidly connected is configured. In the present embodiment, a pair of lag screw bolts 1, 1 are
They are screwed and fixed in such a manner that they cross each other with their phases shifted in the vertical direction. Other configurations are the same as those of the second embodiment, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted. In this embodiment, the configuration using the dowels 50 for transmitting the shearing force is the same as that of the second embodiment. In the present embodiment, a rigid joint type two-way rigid frame can be realized with an extremely simple configuration, and a joint structure having both high construction performance and high strength performance is obtained.

Next, FIG. 16 shows a fourth embodiment of the present invention. In this embodiment, the first wooden member is the beam member 3.
0 indicates the case where the second wood member is also the beam member 30, that is, the case of the beam-beam joint structure. This embodiment is a preferred embodiment when it is necessary to rigidly join the beam members 30 at an intermediate position in the direction between beams. In the present embodiment, two tip holes 40 are formed in one beam member 30, and the lag screw bolts 1, 1 are screwed into the respective tip holes 40, and the female screw of each lag screw bolt 1 is further formed. One male screw portion 12a of the tension bolt 10 is screwed into the portion 5, and the other male screw portion 12b of the tension bolt 10 is fastened and fixed to the other beam member 30 via the washer 14 by tightening the nut 15. A pair of through holes 22 for the tension bolts 10 are formed in the beam member 30 side, and an opening end of the through hole 22 on the center side of the beam member 30 is formed in a notch 23 having a predetermined size. A pair of notches 23 are formed so as to face each other. The shearing force is transmitted by inserting a shear resistance such as the dowel 51 into the beam member 30, approximately at a neutral axis position on the cut edge of each other.

Next, FIG. 17 shows a fifth embodiment of the present invention. In this embodiment, when the first wooden member is the column member 20 and the second wooden member is also the column member 20, as well as,
A joint structure common to both cases where the first wood member is the base member 52 and the second wood member is also the base member 52 is illustrated. In the present embodiment, it is assumed that there is no need to consider the bending moment in the column-to-column or base-to-base joint. Therefore, the joint between the column members 20 or the joint between the base members 52 is 1 This is an example of joining with only one lag screw bolt 1 and correspondingly one tension bolt 10.

A tip hole 40 is formed in one of the column members 20 or the base member 52, and one lag screw 1 is screwed into the tip hole 40. , One male screw portion 12a of the tension bolt 10 is screwed into the other male screw portion 1 of the tension bolt 10 to the other column member 20 or the base member 52.
2b is fastened and fixed by tightening a nut 15 through a washer 14, and a through hole 22 for the tension bolt 10 is formed in the other column member 20 or the base member 52 side. The opening end of the other column member 20 or the base member 52 side has a notch 23 of a predetermined size.
A pair of cutouts 23 are formed so as to face.

FIG. 18 shows a sixth embodiment of the present invention. In this embodiment, the first wooden member is the column member 20 and the second wooden member is the base member 52. 2 illustrates a joining structure. Also in the present embodiment, it is assumed that it is not necessary to consider the bending moment in the joint between the column and the base, and thus, the joint between the column member 20 and the base member 52 requires one lag screw 1 Corresponding to this, a joining example using only one tension bolt 10 is shown.

The base member 52 is formed with a leading hole 40, and the lag screw 1 is screwed into the leading hole 40.
, One of the male screw portions 12a of the tension bolt 10 is screwed,
The other male screw portion 12b of the tension bolt 10 is fixedly fastened to the column member 20 by tightening a nut 15 through a washer 14 through a washer 14. A through hole 22 for the tension bolt 10 is formed in the column member 20 side. A pair of notches 23 are formed such that the opening end of the through-hole 22 on the center side of the column member 30 faces the notch 23 having a predetermined size.

FIG. 19 shows another embodiment of the lag screw bolt 1. In this embodiment, the lag screw bolt 1 is formed with a flange 6 and a hollow hole 4 is formed at the center of the shaft 3. Is formed in a length of 40 mm toward the end of the hole, and the female screw portion 5 is engraved on the peripheral surface of the hollow hole 4 in the same manner as in the embodiment shown in FIGS. In this embodiment, the shaft portion 3 having the female screw portion 5 is formed.
The tip of the shaft portion 3 on the opposite side to the base end is sharpened,
It is intended that the screwing operation when screwing and fixing the lag screw bolt 1 into the front hole 40 be performed more efficiently. Other configurations are the same as those of the embodiment shown in FIGS. 1 and 2, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

FIG. 20 shows a lag screw bolt 1.
The female screw part 5 is provided not only at one end of the shaft part 3 but also at both ends. When the female screw portions 5 of the lag screw bolt 1 are provided at both ends of the shaft portion 3 as described above, for example, two
The one-way lag screw bolt 1 which is tied and fixed linearly to each other, or the one-way lag screw bolt 1 embedded in the column member 20, And the beam member 30 can be joined to one column member 20 in three or four directions, so that a so-called three-way frame or a four-way frame can be realized.

FIG. 21 shows a seventh embodiment of the present invention, in which a so-called four-direction rigid frame in which a beam member 30 is joined to one column member 20 in four directions is illustrated. It is. Further, in the present embodiment, unlike the case of the second embodiment of the present invention shown in FIG. 14 and the like, the column member 20 is formed so that the dowels 51 for transmitting the shearing force may not be used. Has been subjected to predetermined processing,
That is, as shown in FIG. 21, the column member 20 is formed with a notch 53 on which the joint ends of the four beam members 30 can be placed, and the joint end of each beam member 30 is formed. Is mounted on the cutout 53 so that a shear force can be transmitted. Other configurations are
This is the same as the so-called pillar-type joining type shown in FIG. 14, and the same components are denoted by the same reference numerals and description thereof will be omitted.

In the present embodiment, an operation for processing the cutout portion 53 in advance is added, but a more reasonable joining form can be provided to compensate for this. That is, in the present embodiment, the processing work for mounting the dowels for transmitting the shearing force can be omitted, and the work of forming the notch 53, which is much simpler, can be performed. Will be greatly improved.

In each of the above embodiments, the number of lag screw bolts 1 provided at each joint is two or one, and the first wood member and the second wood member have one of the pillars. When the other member 20 is the beam member 30, two lag screw bolts 1 and 1 and two corresponding tension bolts 10 and 10 are disposed at the joint portion to perform the tightening and joining. It can be said that this is the most preferable specific example as a joining type having both high construction performance and high strength.

However, the present invention is not limited to this. Depending on the design conditions, as in the embodiment shown in FIGS. 17 and 18 described above, the joint between the first and second wood members may be One lag screw bolt 1 and one corresponding tension bolt 10 are arranged and tightened.
Joining is also possible. Furthermore, one column member 2
The two beam members 30 are linearly tied and fixed to each other with respect to 0, or two or more lag screw bolts in one direction embedded in a column member, and in a direction orthogonal to this. By embedding two or more lag screw bolts, it is possible to join a beam member to one pillar member in three or four directions.
The directional ramen type can be realized more specifically.

In each of the above embodiments, it is assumed that the material used as the first wood member and the second wood member is a laminated wood having a large cross section. In this case, the first wood member and the second wood member are used. For column members, beam members, etc. as members,
For example, a laminated wood typified by a beech pine laminated wood is used. However, the present invention is not limited thereto, and the present invention is similarly applicable to a so-called engineering wood such as a veneer laminate (LVL) or PSL. Can be applied to In addition, the present invention can naturally also use muku wood like an ordinary traditional wooden structure, and in this case, the operation and effect according to each of the above embodiments can be achieved. I can play.

In each of the above embodiments, the case where the lag screw bolt 1 is formed by processing the shaft portion 3 into a large-diameter lag screw thread portion 2 having a thread root diameter of 25 mm and a thread diameter of 30 mm is exemplified. Since the larger the diameter, the larger the width of the lag screw part 2 to be inserted into the front hole 40, the pull-out resistance of the lag screw bolt 1 is improved. That is, the pull-out strength of the lag screw bolt is ensured to be high, and M16 as a tension bolt screwed into the female screw portion is used.
This configuration is suitable as a specific example in order to increase the length of the bolt to increase the shear strength of the laminated wood, and to further improve the construction performance and manufacturing performance.
However, the present invention is not limited to the above specification, and it is naturally possible to use a larger-diameter lag screw thread portion 2 depending on design conditions, and furthermore, in the case of a joint structure that does not require much pull-out strength. Needless to say, the lag screw thread portion 2 having a diameter smaller than the above specification can be used.

[0070]

According to the first aspect of the present invention, the following effects can be obtained. (1) It is possible to solve the conventional problems and realize a wooden rigid frame structure that can rigidly join wooden members with each other in a joint type that has both high construction performance and high strength using wooden members. Becomes (2) Processing of the front hole in the second wood member, processing of the through hole in the first wood member corresponding to this, further processing of the notch, and screwing of the lag screw bolt into the front hole At the construction site, one male thread of the tension bolt is screwed into the female thread of the lag screw bolt, and the other male thread of the tension bolt is connected to the nut via a washer. Since only the work of tightening and fixing is required, the first wood member and the second wood member can be rigidly joined easily, firmly and accurately with a simple construction procedure, and the end of the first wood member is An excellent joint structure that does not dent into the side surface of the second wood member and has little deformation. (3) By having a large-diameter lag screw thread,
As a result, the width of the lag screw bolt can be set high, and the lag screw bolt can be set to a high withdrawal strength.
By increasing the length of the 16 bolts, the shear strength of the glued laminated lumber can be increased, and further, it is possible to realize improvement in workability and manufacturability. (4) In the beam-joining method, the maximum strength is not determined by the triangular embedding of the end of the column member on the side of the beam member on the compression side, but the lag screw bolt embedded in the beam member is pulled out Since the strength of the joint is determined by the proof strength, a rational and safe design is possible. According to the second aspect of the invention, the following effect can be obtained in addition to the effect of the first aspect of the invention. (5) In particular, when the first wood member is a column member and the second wood member is a beam member, a so-called beam winning joint structure is obtained. On the contrary, since the strength of the joint is determined by the pull-out strength of the lag screw bolt, an extremely rational structure can be realized. Claim 3
According to the invention described above, the following effect can be obtained in addition to the effect of the invention described in claim 1 or 2. (6) In the configuration in which the female screw portion of the lag screw bolt is provided on only one side of the shaft portion, one beam member is fastened and joined to one column member, or a so-called two-way rigid frame is used. As a result, a form in which two beam members are tightly joined and joined to one pillar member at right angles to each other becomes possible. (7) In the configuration in which the female screw portions of the lag screw bolts are provided on both sides of the shaft portion, two beam members are linearly fastened and fixed to one column member, or A lag screw bolt is buried in a column member in one direction, and a lag screw bolt is also buried in a direction orthogonal to the lag screw bolt, and a beam member is joined to one pillar member in three or four directions. It is also possible to realize a so-called three-way frame or a four-way frame. (8) Therefore, it is possible to simultaneously rigidly join both directions in the inter-beam direction and the girder direction by using a wooden member. Similarly to a steel frame structure or a reinforced concrete structure, not only a one-way but also a two-way The directional ramen and the four-directional ramen can also be realized with a wooden structure. Claim 4
According to the invention described above, the following effects can be obtained in addition to the effects of the invention described in any one of claims 1 to 3. (9) The number of lag screw bolts 1 provided at each joint is as follows: if one of the first and second wood members is a column member and the other is a beam member, two It is most preferable that the lag screw bolt and two tension bolts corresponding to the lag screw bolt are arranged to be tightly joined and joined together as a joining type having both high construction performance and high strength. (10) It is also possible to dispose one lag screw bolt and one corresponding tension bolt at the joint portion between the first wood member and the second wood member to tighten and join them. . (11) Two beam members are linearly tied and fixed to each other in a straight line, or two or more lag screw bolts in one direction embedded in the column member. It is also possible to embed two or more lag screw bolts in the direction orthogonal to this, and to join the beam members in one direction in three or four directions.
The four-way rigid frame type can also be realized more specifically.
The invention according to claim 5 has the following effects in addition to the effects of the invention according to any one of claims 1 to 4. (12) By using a structural material called large-sized laminated wood,
The role of the final work material is also given to this, so that it is possible to reduce the cost of the internal finishing and secure a large space with a large degree of freedom. (13) As the first wood member and the second wood member, in addition to a glued laminated wood typified by Baymatsu glued laminated wood, a laminated veneer (LV)
So-called engineering woods such as L) and PSL are also applicable, and it is also possible to use ordinary muk wood, so that there are many options and various design examples are possible. (14) When the first wood member and the second wood member are formed of a laminated wood having a large cross section, it is best to form the front holes in the laminating direction and the width direction of the laminated wood from the viewpoint of strength. However, the present invention is not necessarily limited to this, and different joining structures can be used depending on design conditions. The invention according to claim 6 has the following effects in addition to the effects of the invention according to any one of claims 1 to 5. (15) The lag screw thread portion of the lag screw bolt is set to a large set dimension such as a screw root diameter of 25 mm and a screw thread diameter of 30 mm. Since it is processed and formed, the lag screw thread portion of the lag screw bolt is screwed and fixed while biting into the peripheral surface of the front hole by the difference dimension of 3 mm from its outer diameter, and sufficient digging force A sufficient pull-out resistance can be exhibited, and the resistance at the time of screwing can be suppressed to a relatively low level to improve construction performance.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram viewed from a side showing a configuration of a lag screw bolt according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a configuration of a lag screw bolt according to the first embodiment of the present invention.

FIG. 3 is an explanatory view showing a case where a beam wins in a joint structure between a column member and a beam member according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a joint structure between a column member and a beam member according to the first embodiment of the present invention.

FIG. 5 is a conceptual diagram showing an outline of a pull-out strength test device for a joint structure between a column member and a beam member according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram showing details of a pull-out strength test device for a joint structure between a column member and a beam member according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram showing details of a pull-out strength test device for a joint structure between a column member and a beam member according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a pullout strength test result of the joint structure between the column member and the beam member according to the first embodiment of the present invention.

FIG. 9 is a diagram showing a pullout strength test result of the joint structure between the column member and the beam member according to the first embodiment of the present invention.

FIG. 10 is a conceptual diagram showing a beam-column moment resistance joining test apparatus for a joint structure between a column member and a beam member according to the first embodiment of the present invention.

FIG. 11 is a partial detailed view of FIG. 10;

FIG. 12 is a conceptual diagram showing a test result of a beam-column moment resistance joint of the joint structure between the column member and the beam member according to the first embodiment of the present invention.

FIG. 13 is a conceptual diagram showing a test result of a beam-column moment resistance joint for the joint structure between the column member and the beam member according to the first embodiment of the present invention.

FIG. 14 is an explanatory diagram showing a case where a pillar wins in a joint structure between a pillar member and a beam member according to a second embodiment of the present invention.

FIG. 15 is an explanatory view showing a case of a two-way rigid frame with a column win in a joint structure between a column member and a beam member according to a third embodiment of the present invention.

FIG. 16 is an explanatory diagram showing a joint structure between a beam member and a beam member according to a fourth embodiment of the present invention.

FIG. 17 is an explanatory diagram showing a joint structure between a pillar member and a pillar member or a foundation member according to a fifth embodiment of the present invention.

FIG. 18 is an explanatory view showing a joint structure between a column member and a base member according to a sixth embodiment of the present invention.

FIG. 19 is an explanatory diagram viewed from the side showing another configuration example of the lag screw bolt according to the present invention.

FIG. 20 is an explanatory side view showing another example of the configuration of the lag screw bolt according to the present invention.

FIG. 21 is an explanatory view showing a joint structure of a four-way frame of a column member and a beam member according to a seventh embodiment of the present invention.

FIG. 22 is an explanatory view showing a joint structure between a column member and a beam member according to Conventional Example 1.

FIG. 23 is an explanatory view showing a joint structure between a column member and a beam member according to Conventional Example 2.

FIG. 24 is an explanatory view showing a joint structure between a column member and a beam member according to Conventional Example 2.

FIG. 25 is an explanatory view showing a joint structure between a column member and a beam member according to Conventional Example 3.

FIG. 26 is an explanatory view showing a configuration of a lag screw bolt according to Conventional Example 3.

FIG. 27 is a partially detailed view showing a configuration of a lag screw bolt according to Conventional Example 3.

Table 1 is a table showing the basic materials of a specimen for a pull-out strength test for a joint structure between a column member and a beam member according to the first embodiment of the present invention.

Table 2 is a table showing a pull-out strength test result of the joint structure between the column member and the beam member according to the first embodiment of the present invention.

Table 3 is a table showing a pull-out strength test result of the joint structure between the column member and the beam member according to the first embodiment of the present invention.

Table 4 is a table showing the basic materials of the specimens for the beam-column moment resistance joining test for the joint structure between the column member and the beam member according to the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lag screw bolt 2 Lag screw screw part 3 Shaft part 3a Shaft end face 3b Shaft center 4 Hollow hole 5 Female screw part 6 Flange part 7 Hollow hole opening end 10 Tension bolt 11 (Tension bolt) Shaft part 12 Male screw part 14 Washer 15 Nut 20 First wood member 21 (First wood member) End face 22 Through hole 22a One open end 22b The other open end 23 Notch 30 Second wood member 31 (Second wood member) surface 40 Front hole 41 Steel reaction force frame 42 Anchor fixing stand 43 Test device 44 Oil jack 45 Load cell 46 (High precision) displacement meter 47 Glued lumber block 48 Reaction force stand 49 Pin 50 Roller 51 Dowel 52 Base 53 Notch 60 Column member 61 Beam member 62 Gusset plate 63 Slit 64 Drift pin 65 Small hole 66 Small through hole 67 Tension bolt 68 Insertion hole 69 Notch 70 Washer 71 Nut 72 Slit 73 Through hole 74 Gusset plate 75 T-shaped head plate 76 Through hole 77 T-shaped leg plate 78 Drift pin 79 Small hole 80 Lug screw bolt 81 Shaft 82 Lug Screw screw part 83 Bolt screw part 84 Nut

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E125 AA04 AA14 AB12 AC23 AG12 AG14 AG56 BB08 BB19 BB23 BB24 BB30 BC09 BD01 BE07 BF06 CA05 CA09 CA13 CA14 EA33

Claims (5)

[Claims] 1. A joining structure for joining and fixing a first wood member and a second wood member using a lag screw bolt and a tension bolt, wherein the lag screw bolt has a lag screw screw portion. A hollow hole is formed in the shaft portion by a predetermined dimension from the axial end surface of the shaft portion toward the center of the shaft portion, and a female screw portion is formed on the peripheral surface of the hollow hole, and the tension bolt is Male screw portions are formed at both ends of the shaft portion, and one male screw portion can be screwed into the female screw portion. One of the first wood members to be joined faces the second wood member. A through hole having a predetermined length is formed toward the center of the first wooden member with the end surface of the hollow base as a base end, and a notch having a predetermined size is formed at the tip of the through hole. The other end of the second wood member to be joined is the open end of the hole. The lag screw bolt is screwed and fixed to the second wood member until it is flush with the position, and the one male screw part of the tension bolt is screwed and fixed to the female screw part, and the axis of the tension bolt Part is inserted into the through hole, and the other male screw part of the tension bolt protruding into the notch part is fastened and fixed by nut tightening via a washer, so that the first wood member and the A joining structure for a wooden member, wherein the joining member is fixed to a second wooden member. 2. The first wood member is a pillar member and the second wood member is a beam member, or the first wood member is a beam member and the second wood member is a pillar member. The joining structure of a wooden member according to claim 1, characterized in that: 3. The joining structure according to claim 1, wherein the female screw portion of the lag screw bolt is provided at one end or both ends of the shaft portion. 4. The lag screw bolt and the tension bolt are provided at at least one joint portion between the first wood member and the second wood member, and are joined and fixed. The joining structure of a wooden member according to any one of claims 3 to 3. 5. The joint structure for wood members according to claim 1, wherein the first wood member and the second wood member are formed of structural glued laminated wood.