JP2021165525A - Construction method of wooden rigid frame structure - Google Patents

Abstract

To provide a construction method of a wooden rigid frame structure accomplishing a rigid connection of a column beam framework as a connection structure, solving a looseness of the connection part or facilitating a repair of the deformation even when the framework is deflected later by an earthquake or the like, or is subject to a secular change.SOLUTION: A metallic screw-type connection mechanism 2 aiming for a rigid connection of a column beam comprises a first coupler 4, a joint bolt 5, a bearing nut 6 and a second coupler 7. Inner screws 7A,7B of the second coupler are in a helical shape in a same direction, and a screw pitch pB of the second inner screw 7B engaged with a head outer peripheral screw 20A projecting from a step surface 22a is arranged to be larger than the screw pitch pA of the first inner screw 7A positioned at the joint bolt 5 side. A lag screw 14 of a beam to be installed next 11B is pulled in a direction of an existing column 12A by a rotation of the second coupler 7, thus, the beam to be installed next 11B can be joined to the existing column 12A rigidly.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for constructing a wooden rigid frame structure. Specifically, the present invention not only aims at rigid joining of beams and beams in a wooden building, but also causes the building to become thin even if the building is distorted due to a large load due to a subsequent earthquake or the like. Even so, it is related to the construction method of a wooden rigid frame structure that can repair the rigid joint after the fact, and also enables the dismantling and reconstruction of the beam-column frame structure and facilitates removal and relocation. ..

In a wooden building, columns are erected on a foundation anchored to the foundation, and beams are laid to form a column-beam framework. Braces are added to this, and wall panels are added in the two-by-four method to prevent the deformation of the framework from becoming large. If this framework is made rigid, braces and wall panels are not required, large openings for entrances and windows can be obtained, and many can be provided. That is, although it is a wooden building, a rigid structure equivalent to or close to that of a steel structure is realized.

However, since the framework is not made of steel, the rigidity of the joint is far below that of steel-frame welding and bolt fastening. Nevertheless, efforts have been made to introduce rigid frame structures in wooden buildings as well, and a typical example is to interpose steel hardware at the joints and join them with bolts, etc. without spoiling the appearance of the columns and beams. It is done. The hardware may be a steel gusset plate or similar bracket, but the entire hardware may be embedded in the beam, or it may be fixed with bolts or pins on either side of the beam. Partial exposure may be unavoidable.

For example, in Patent Document 1, a cross-shaped notch extending in the vertical direction by the back of the beam is formed in each of the lower end joint of the upper floor pillar and the upper end joint of the lower floor pillar, and the remaining portion is made into a groove. Is disclosed. Although the details are omitted, as shown in FIG. 13A, slits 43 are formed at each tip of the cross 41 and the end of the beam 42 to be combined with the notch and tenon, and the gusset plate 44 embedded therein is formed. A drift pin 45 is inserted through the mortise and tenon 45 to join the two.

In Patent Document 2, as shown in FIG. 13B, a bracket 47 which is U-shaped in a plan view and protrudes toward the beam is attached to the side joint of the pillar 46, and a slit provided at the end of the beam 48 is provided. The structure to be fitted to 49 is shown. This is also essentially the same as the gusset plate and drift pin coupling form.

Patent Document 3 has a form in which the entire joint fitting is exposed at the joint, and this is a beam-shaped joint plate 52 having a shape like an angled steel material 51 back to back, as shown in FIG. 13 (c). It is fixed to the end of 53 or the pillar 54. That is, a metal joint structure 55 having wing-shaped joint plates attached to three or four sides is arranged at the intersection position of the columns and beams, and the wing-shaped joint plate and the wing-shaped joint plate of the column or the wing-shaped joint plate of the beam are arranged. And are fixed via bolts.

Japanese Unexamined Patent Publication No. 6-185115 Jitsuto 3090665 JP-A-2005-264688

In any of the above examples, a bolt for joining or the like is inserted from the side surface of the beam, for example, into an insertion hole or a bracket receiving recess provided in the embedded gusset plate, but the hole or recess is slightly larger than the bolt diameter. Therefore, even if the bolt is fastened with a nut, the initial backlash is left as in the case of the drift pin. It can be said that the rigid joint structure cannot be perfected in that the columns and beams or the beams are not directly integrated by bolts or the like in the case of using this kind of metal fittings.

By the way, when the beam is subjected to a downward load at the intermediate portion, the bending moment acting on the joint portion of the beam column causes tension in the upper layer portion of the beam and compression in the lower layer portion of the beam. As a result of the drift pin on the tension side exerting a force in the extending direction of the fiber of the beam, the beam must counter with the weakest split strength. In order to reduce the stress acting on the drift pin, it is also necessary to increase the structure of the beam. Since the pin diameter is small, it is even more so if stress concentration of bearing pressure occurs.

In addition, even if a plurality of drift pins are used, the initial backlash is unavoidable as described above, and the tight fastening is not always maintained due to aging or the like. Furthermore, one of the major drawbacks of gusset plates and the like, which have a cross-sectional performance smaller than that of the beam cross-section, is that they cannot exert bending strength commensurate with the strength of wood.

If the above-mentioned gusset plate or bracket is deformed when a large load is applied, the shaft assembly can hardly be modified. Therefore, even if the building is distorted due to a large load due to an earthquake, or even if the tree is thinned, the loosening of the rigid joint cannot be eliminated after the fact, let alone the column-beam frame structure can be reused. There is no hope for dismantling.

The present invention has been made in view of the above problems, and an object of the present invention is to achieve rigid joint of a column-beam frame as a joint structure without initial backlash, and even if the frame is distorted due to an ex post facto phenomenon such as an earthquake. The purpose of the present invention is to provide a method for constructing a wooden rigid frame structure capable of eliminating loosening of joints and easily repairing deformation even if the joints change over time.

In the present invention, a wooden ramen structure in which columns and beams are rigidly joined in a wooden building, that is, with reference to FIG. 1, the wooden ramen structure itself is as follows, and either the existing pillar 12A or the next pillar 12B At least a pair of horizontal through holes 17 are bored vertically in the wooden column at the portion where the column and the beam are rigidly joined, and the outer periphery of the head portion of the lug screw 14 screwed into the existing beam 11A is formed in the through hole 17. A first metal coupler 4 having a first female screw 4A to which the screw 20A is engaged is loaded, and a step portion 22 for reducing the cross-sectional dimension is formed on the beam arranged between the wooden columns, and the step surface 22a thereof is formed. A wooden end 11m having a small cross-sectional dimension is formed on the side of the existing pillar 12A, and a wooden opening 11n having a large cross-sectional dimension is formed on the side of the next pillar 12B. The beam outer concave recessed space 23 has a length capable of arranging a joint to be connected to the second female screw 4B provided on the anti-first female screw side of the first coupler 4, and is another lug screw on the extension line of the through hole 17. 14 is screwed into the existing pillar side in the next beam 11B so that the head 20 on which the outer peripheral screw 20A is engraved protrudes from the stepped surface 22a of the beam, and another lug screw 14 is inserted into the next pillar. The head 20 engraved with the outer peripheral screw 20A is screwed into the next pillar side in the next beam 11B so as to protrude from the end 11n on the side facing 12B, and the connecting bolt 5 engages with the second female screw 4B. The existing column 12A is supported in the vicinity of the through hole 17 by the nut 6 hung on the connecting bolt 5, and the connecting bolt 5 is engaged with the metal second coupler 7 by the first internal screw 7A. In the second coupler 7, a second internal screw 7B meshed with the head outer peripheral screw 20A of the lug screw 14 protruding from the stepped surface 22a is formed on the side of the anti-first internal screw, and the second internal screw 7B is formed. And the first internal thread 7A are spirals in the same direction, but the thread pitch p _{B of the second internal thread 7B is larger than the thread pitch p A} of the first internal thread 7A, and the first coupler 4 and the connecting bolt 5 , A wooden ramen structure in which rigid joining of columns and beams is achieved by a metal screw type joining mechanism 2 provided with a bearing nut 6 and a second coupler 7, and the construction method applied thereto is also shown in FIG. Referring to, first, in order to place the following設梁11B _L in position, size and it can be arranged connecting bolts 5 and the second coupler 7 between the lower floor for the next設梁11B _L and the existing columns 12A To create a gap δ (see FIG. 4) At that time, the anchor bolt 25 (see FIG. 4) on the side of the existing pillar 12A among the anchor bolts of the next pillar 12B is loosened so that the next pillar 12B does not fall any further. Pull it to
Placed under floor for Joint hanging next設梁11B _L for the lower floor in this state, the head outer circumferential screw 20A of the lag screw 14 which is screwed to the side of the butt end 11n of a large portion of the cross-sectional dimension Shitakai to face the through-hole 17 _L of use, placed on the upper floor for Joint hanging also upstairs for the next設梁11B _U, the beam dimensions are threaded into the side of the cut end 11n of part of intact lug the head periphery screw 20A of the screw 14 to face the through hole 17 _U for the upper floor,
The first coupler 4 is inserted into the through holes 17 _L and 17 _U , and each first female screw 4A is engaged with the head outer peripheral screw 20A protruding from the next beam 11B until the screw bottom is reached, and the next beam 11B Support the existing pillar side of
The connecting bolt 5 faces the beam outer concave recessed space 23 formed by the stepped surface 22a of the next beam 11B, and the existing column side of the screw is engaged with the second female screw 4B of the first coupler 4 to the screw bottom to support it. The pressure plate 8 and the nut 6 are arranged, the nut 6 is tightened so that the pressure plate 8 strongly presses the existing pillar 12A, and the next beam 11B and the existing pillar 12A are tightly fastened. It is placed between the connecting bolt 5 and the head outer peripheral screw 20A protruding from the stepped surface 22a, and is deeply screwed until the second coupler 7 abuts on the nut 6, and these operations can also be performed at the upper floor joint. Made,
In this state, spacers 27 are attached to the small _{end beams 11m and 11m of the next beams 11B L} and 11B _U not only for the lower floor but also for the upper floor, and the next pillar 12B is pulled to raise it. _{The spacer 27 L} attached to the _{next beam 11B L} for the lower floor is brought into contact with the existing pillar 12A.
The second coupler 7 is rotated to reduce the amount of screwing between the first internal screw 7A and the connecting bolt 5, and the second internal screw 7B is initially screwed to the head outer peripheral screw 20A protruding from the stepped surface 22a.
If the next pillar 12B is tilted _{to remove the spacer 27 L} , the second coupler 7 is advanced toward the head outer peripheral screw 20A, and the second coupler 7 is rotated (difference in screw pitch x number of rotations), the lag is increased. The screw head 20 and the connecting bolt 5 are brought close to each other, and the _{lug screw head is moved by the thickness of the removed spacer 27 L.} At this time, the second coupler 7 in the four screw type joining mechanisms 2 at the joint is The anchor bolts 25 (see FIG. 9), which are rotated at almost the same time and are loosened among the anchor bolts of the next column 12B, are tightened to make the next column 12B stand upright, and the spacer _{11B U for the upper floor next column is used.} 27 _U is left in an upright position, where the space between the next pillar 12B and the existing pillar 12A is widened, the spacer 27 _U is removed, and then the operation for the upper floor is the same as the operation for the lower floor joint. Install the following設梁11B _U, is that a procedure for the tightening of the second coupler 7 of all floors.

According to the present invention, the metal screw type joining mechanism for rigid joining of columns and beams includes a first coupler, a connecting bolt, a nut for bearing pressure, and a second coupler, and the two internal threads of the second coupler are in the same direction. However, since the screw pitch of the second internal screw is larger than the screw pitch of the first internal screw located on the connecting bolt side, the lug screw of the next beam can be used as an existing pillar by rotating the second coupler. It can be pulled in the direction, and as a result, the next beam can be rigidly joined to the existing column.

Since the lug screws that are screwed into the two beams that sandwich the existing column are tightly connected by the screw type joining mechanism, even the beams that are discontinuously arranged across the column are strongly joined, and by extension, the beams. The unity with the columns sandwiched between the columns is also significantly improved, and a wooden rigid frame structure in which the rigid joints of the columns and beams are achieved can be obtained.

At both ends of the next beam placed between the existing pillar and the next pillar, a wood end is formed that is in close contact with the facing surface of the wooden pillar. By providing a part, it is made smaller than the end of the tree on the side of the next pillar. Since the beam outer concave recessed space from the end of the existing column to the stepped portion has a length that allows the joining tool such as the second coupler to be placed, it is exposed from the existing column and the next beam in the screw type joining mechanism. The portion can be housed in the concave outer space of the beam.

Compared to the gusset plate mechanism, which is fixed in the axial direction of the beam from the side surface of the beam with a drift pin, etc., the joint is clearly free of initial backlash, and rigid joining of the beam-column framework is achieved. NS. Since this screw type joining mechanism can be rotated, even if the shaft assembly is distorted or deformed due to a large load, or if there is play due to aging, etc., if the second coupler is further tightened, rigid joining will occur. The state can be reproduced.

According to the present invention, since the lug screw screwed into the two beams sandwiching the existing column is tightened by the screw type joining mechanism, strong joining is made even between the beams arranged discontinuously, which in turn leads to a strong joining. The integrity with the columns sandwiched between the beams is significantly improved, and rigid joining of the columns and beams is achieved.

The main configuration of the screw type joining mechanism that forms the wooden rigid frame structure that is the object of the construction method of the present invention, and the joining mechanism that is in the stage of advancing the second coupler toward the outer peripheral screw of the head are the lower floors of the framework. Schematic diagram of the main part applied to the mouth. The whole front view which the screw type joining mechanism is introduced into the column beam frame of a double-decker house and completed. (A) is a front view of an example of a single beam, (b) is a perspective view of a joint state at a joint in a frame of a square column, and (c) is a perspective view showing a state in which screw type joining mechanism groups intersect. (D) is a perspective view of the joint state at the joint in the framework of the round pillar, and (e) is a front view of an example in which the beams have different shapes. Front view of the state where the next column is tilted so as to create a gap δ between the next beam for the lower floor and the existing column. (A) is a schematic view of the state where the connecting bolt is facing the first coupler, (b) is a schematic view of the state where the bearing plate, the disc spring washer, and the nut are arranged, and (c) is the bearing plate strengthening the existing column. Schematic diagram of the state where the nut is tightened so as to press. The schematic diagram of the state where the 2nd coupler is arranged between the connecting bolt and the head outer peripheral screw protruding from a step surface. Schematic diagram of a state in which the second coupler is deeply screwed to the connecting bolt until it abuts on the nut. Schematic diagram of a state in which the second coupler is rotated to reduce the amount of screwing between the first internal screw and the connecting bolt, and the second internal screw is initially screwed to the head outer peripheral screw protruding from the stepped surface. Schematic diagram when the spacer of the next beam for the lower floor is removed by tilting the next column slightly away from the existing column with a jack in a horizontal position. Schematic diagram of when the jack is extended to widen the space between the next pillar for the upper floor and the existing pillar and the spacer is removed. Top view of the joint in the form of crossed beams. Plan view A plan view of the joints of the beams arranged in a T shape. An example of a rigid joint structure disclosed in the prior art document.

Hereinafter, the wooden rigid frame structure and the method for constructing the wooden rigid frame structure according to the present invention will be described in detail with reference to the drawings showing the embodiments thereof. FIG. 1 shows the state of the column and beam at a certain stage in the construction of the column and beam framework 1, and the entire shape of the metal screw type joining mechanism 2 at that time is largely shown in the center. By this joining mechanism, the wooden rigid frame structure 3 shown in FIG. 2 in which columns and beams are rigidly joined in a wooden building is realized.

As shown in FIG. 1, the joining mechanism 2 includes a first coupler 4, a connecting bolt 5, a bearing nut 6, and a second coupler 7. In the illustrated example, the bearing plate 8 and the disc spring washer 9 are also included. Of these elements, the direct element that achieves rigid bonding is the second coupler 7, which, like the first coupler 4, has two female threads aligned in the axial direction. It should be noted that, as shown in the enlarged view shown in the lower left, in the second coupler 7, the first internal thread 7A and the second internal thread 7B forming the female thread are spirals in the same direction, but the second internal thread 7B The thread pitch p _B is made larger than _{the thread pitch p A} of the first internal thread 7A. By rotating the second coupler 7, the beam 11 can be brought closer to the column 12, and not only can both be rigidly joined, but also the beam 11 sandwiching the column 12 and the beam 11 can be rigidly joined.

Before concretely explaining those elements, the overall form in which the screw type joining mechanism 2 is introduced into the beam-column framework 1 will be described. The framework is as shown in FIG. 2, which is an example of a double-decker house. In the framework 1, the beams 11 shown in FIG. 3A are bridged over the columns 12 arranged as shown in FIG. The screw type joining mechanism 2 to be introduced is applied to each of the lug screws 14 described later, and is paired vertically and horizontally in one cross section of the beam 11 as shown in FIG. 3 (b). Therefore, if the lag screw group 15 is drawn in the shape of a rod composed of four, it will be as shown in FIG. 3 (c). One group extends through a column 12 having a rectangular cross section, and the other groups provided as needed are arranged so as to intersect. In this example, group 15M is located in the internal region of group 15T. In the following description, since the framework is viewed from the front, only the upper and lower pairs of the four screw type joining mechanisms are shown.

The elements constituting the screw type joining mechanism 2 will be described in detail individually. The first coupler 4 is a tubular body as shown in FIG. 1, and a first female screw 4A and a second female screw 4B are formed in series. In this example, both female threads have the same direction spiral, the same diameter, and the same pitch. The coupler 4 is attached to an already firmly upright pillar 12A (hereinafter referred to as an existing pillar) shown on the right side of FIG. Horizontal through holes 17 are vertically bored in the upright existing column at a portion (joint) where the beam 11B (hereinafter referred to as the next beam) to be incorporated is to be rigidly joined. There is. The first coupler 4 is loaded into the through hole 17, but the size is slightly shorter than that of the through hole 17 in order to effectively exert the bearing action described later.

As shown in FIG. 1, the first female screw 4A described above is formed so as to mesh with the head portion outer peripheral screw 20A of the lug screw 14A screwed into the existing beam 11A. The second female screw 4B is for screwing the connecting bolt 5 mentioned above. The first coupler 4 is already loaded in the existing pillar 12A as described in the construction method described later, and is installed in the pillar 12B (hereinafter referred to as the next pillar) that is about to be erected in parallel with the existing pillar. Is also loaded at the stage of FIG. 4, which will be described later. Incidentally, the lug screw 14 includes a screw shaft screwed in the axial direction of the beam to which reference numerals 18, 19 and 20 are given in FIG. 1, a janal and a head. The outer peripheral screw 20A is formed on the head 20, and the screw of the lug screw 14 and the outer peripheral screw 20A of the head portion have the same diameter, and are, for example, machined from a round bar.

By the way, as shown in FIG. 3A, a step portion 22 for reducing the cross-sectional dimension is formed on the beam arranged between the wooden pillars on the existing pillar side. With the stepped surface 22a (see FIG. 1) as a boundary, the end 11m of the portion having a small cross-sectional dimension is next to the existing pillar 12A, and the end 11n of the portion having the original beam dimension (the portion having a large cross-sectional dimension) is nextly installed. It will be formed on the side of the pillar 12B. The beam outer concave recessed space 23 from the wood end 11 m having a small cross-sectional dimension to the stepped surface 22a has a length at which a joint tool described later to be connected to the second female screw 4B provided on the anti-first female screw side of the first coupler 4 can be arranged. Will be done. Needless to say, the portion having a small cross section is selected to have dimensions that exhibit the desired strength as a beam.

All of the lug screws 14 applied to the next beam 11B are on the extension line of the through hole 17 of the existing column 12A, and one is such that the head 20 on which the outer peripheral screw is engraved protrudes from the stepped surface 22a of the beam. It is screwed into the existing pillar side. The other is screwed into the next pillar side so that the head 20 on which the outer peripheral screw is engraved protrudes from the end 11n on the side facing the next pillar 12B.

The connecting bolt 5 as the joining tool described above is engaged with the second female screw 4B, and the existing pillar 12A is supported in the vicinity of the through hole 17 by the nut 6 hooked on the connecting bolt 5. In order to reduce the high surface pressure acting on the bearing pressure portion as much as possible and make the bearing pressure effective, the bearing plate 8 is applied to the existing pillar 12A, and the disc spring washer 9 is sandwiched to prevent the nut 6 from loosening. It is planned. Since the existing pillar 12A is slightly compressed by the pressing force of the bearing plate 8, the first coupler 4 has a through hole as described above so that the first coupler 4 does not get in the way during the bearing. It is a little shorter than 17. By the way, even if the bearing pressure action is reduced, the next beam 11B can be attracted to the existing column 12A, and the next beam 11B can be attracted to the existing beam 11A after the fact, as will be described later. The pinching pressure acting on the beam does not decrease unexpectedly.

A second metal coupler 7 as another joint is engaged with the connecting bolt 5 by a first internal screw 7A. In the second coupler 7, a second internal screw 7B meshed with the head outer peripheral screw 20A of the lug screw 14 protruding from the stepped surface 22a is formed on the anti-first female screw side, and the second internal screw 7B and the second internal screw 7B are formed. Although it is a spiral in the same direction as the first internal thread 7A, it has already been mentioned that _{the thread pitch p B of the second internal thread 7B is larger than the thread pitch p A of the first internal thread 7A.}

Next, the procedure of how to build the column-beam frame 1 using the screw type joining mechanism 2 will be described. _{In addition, in the example of incorporating the next beam 11B L for the lower floor and the next beam 11B U} for the upper floor between the existing column 12A and the next column 12B to complete the framework 1 as shown in FIG. be.
(1) In order to arrange the next beam 11B _L at a predetermined position, the next column 12B is provided so as to create a gap δ between _{the lower floor next beam 11B L and the existing column 12A as shown in FIG.} Tilt. At that time, among the anchor bolts of the next pillar 12B, the anchor bolt 25 on the side of the existing pillar 12A is loosened, and the next pillar 12B is pulled by the lever block (registered trademark) 26 so as not to fall further. This δ may have a size that allows the connecting bolt 5 and the second coupler 7 as a joint to be arranged. In this case, the larger the gap δ is generated between the upper floor for the next設梁11B _U and the existing columns 12A course. As can be seen from FIGS. 5C and 6, δ may be set to a _{dimension δ 1 in} which the second coupler 7 can be arranged in a state where the connecting bolt 5 protrudes from the through hole 17 and is fixed. When the connecting bolt 5 is _{longer than δ 1, as} can be seen from FIG. 5A, the connecting bolt 5 may be set to have a _{dimension δ 2 that can be arranged to engage with the first coupler 4.}
(2) lag screw 14 that the next設梁11B _L for the lower floor in a state placed under floor for Joint hanging as shown in Figure 4, is screwed to the side of the butt end 11n of a large portion of the cross-sectional dimension Head outer peripheral screw 20A faces _{the through hole 17 L for the lower floor.} Place upstairs for the next設梁11B upstairs for Joint _U also hanging, the head outer circumferential screw 20A of the lag screw 14 the beam size is screwed into the side of the cut end 11n of part of intact upstairs It faces the through hole 17 _{U for use.}
(3) At this point, a drift pin (not shown) is struck at a predetermined position to prevent a large change in the posture of the next beam 11B on the side of the next column, and the first _{through holes 17 L} and 17 _{U are used.} The coupler 4 is inserted, and each first female screw 4A is engaged with the head outer peripheral screw 20A protruding from the next beam 11B until the screw bottom is reached. The existing column side of the next beam 11B is supported by _{jacks J 1} and J _{2 as shown in the figure.}
(4) The connecting bolt 5 shown in FIG. 5 (a) is made to face the beam outer concave recessed space 23 formed by the stepped surface 22a of the next beam 11B, and the existing column side of the screw is placed on the first coupler 4. Engage with the second female screw 4B to the bottom of the screw. As shown in FIG. 5 (b), the bearing plate 8, the disc spring washer 9, and the nut 6 are arranged, and the nut 6 is tightened so that the bearing plate 8 strongly presses the existing column 12A as shown in FIG. 5 (c). The disc spring washer 9 prevents the nut 6 from loosening, and the next beam 11B and the existing column 12A are tightly fastened. In that state, as shown in FIG. 6, the second coupler 7 is arranged between the connecting bolt 5 and the head outer peripheral screw 20A protruding from the stepped surface 22a, and the second coupler 7 is the nut 6 as shown in FIG. Screw deeply until it touches. These operations are also performed at the upper floor joint.
(5) In this state, a plastic spacer 27 having a desired thickness t, for example, 4 mm, is pinned to the small cross-sectional dimensions of _{the next beams 11B L} and 11B _U not only for the lower floor but also for the upper floor. And attach it. The next pillar 12B is pulled up by the lever block (registered trademark) 26 (see FIG. 4), and the spacer 27 _{L attached to the lower floor next beam 11B L} is brought into contact with the existing pillar 12A as shown in FIG. By the way, t greater than the gap between the upper floor for the next設梁11B _U and the existing columns 12A occurs.
(6) The second coupler 7 is rotated to reduce the amount of screwing between the first internal screw 7A and the connecting bolt 5, and as shown in FIG. 8, the second internal screw 7B protrudes from the stepped surface 22a. The initial screw state is set to the screw 20A, for example, about 1 pitch.
(7) Then, a little beat following設柱12B to remove spacer 27 _L by a jack J ₃ in the horizontal posture in FIG. The jack J ₃ is removed, and the second coupler 7 is advanced toward the head outer peripheral screw 20A as shown in FIG. The first inner screw 7A which engages the connecting bolt 5 and the second inner thread 7B engaged with the head outer circumferential screw 20A the same direction spiral is identical diameter, thread pitch p _B within the second screw 7B are first internally threaded 7A Since the screw pitch p _A is larger than that of No. 2, if the second coupler 7 is rotated (difference in screw pitch x number of rotations), the lug screw head 20 and the connecting bolt 5 come closer to each other. The lug screw head is moved by the thickness of _{the spacer 27 L} that has achieved the amount of engagement in which each internal screw exerts a predetermined force and has been removed. At this time, the second coupler 7 in the four screw type joining mechanisms 2 at the joint is rotated at substantially the same time. Tighten the loosened anchor bolts 25 (see FIG. 9) among the anchor bolts of the next pillar 12B to make the next pillar 12B stand upright. The thickness t of the spacer 27 is assumed to correspond to (difference in screw pitch x number of rotations), and a predetermined engagement is achieved when the end 11 m abuts on the existing pillar 12A.
(8) Since the spacer 27 _U is left in the upper floor next beam 11 B _{U , the next pillar 12 B U} is in a stretched state at the upper floor joint even though it is in an upright state. Therefore, the jack J ₄ shown in FIG. 9 is extended to expand the space between the next pillar 12B and the existing pillar 12A, and the spacer 27 _U is removed. Then attach the following設梁11B _U for the upper floor by the same operations as in the Joint for the lower floor (see Figure 10). When the second coupler 7 on all floors is fully tightened, the framework 1 for the first and second floors is completed as shown in FIG. Further, when constructing the next framework 1, the columns may be installed one after another, and the beams described above may be regarded as existing columns and the beams may be incorporated one after another in the same manner. For example, as shown in FIGS. 11 and 3 (c), the screw type joining mechanisms may be crossed to form a crossed form 31 of the beams, or a form 32 having a T-shaped plan view as shown in FIG. 12 may be formed. .. By the way, when the framework is not added, the retaining metal fitting 33 may be attached to the first coupler. If the beam outer concave space 23 is covered with a wooden cover 34 (see FIG. 10) or the like, the appearance of the column-beam joint can be easily adjusted.

The existing pillar 12A and the next pillar 12B are shown with a rectangular cross section, but a round pillar 35 may be used as shown in FIG. 3 (d). Further, since it is only necessary to form the end of a portion having a small cross-sectional dimension on the next beam 11B with the stepped surface as a boundary, if it is drawn extremely, even the deformed beam 36 as shown in FIG. 3 (e) has a predetermined strength. If you have, you can do it. The end 11 m has a shape obtained by forming the outer concave space of the beam at two places above and below the beam, but the shape can be obtained by forming two places on the left and right, or it is formed at four places around the beam. It can also be in the form obtained by this.

By the way, in the above example, the second internal thread 7B and the first internal thread 7A of the second coupler 7 are assumed to have the same diameter, but they are spiral in the same direction and the screw pitch is larger than that of the first internal thread 7A. If the internal screw is 7B, the diameter does not have to be the same. However, if the diameters are the same, the structure and shape of the coupler itself will be simplified as much as possible, and it will be easier to manufacture, which is convenient.

Further, in the above example, the thread pitch of the second internal thread 7B is larger than the thread pitch of the first internal thread 7A, and the thread pitch of the second female thread 4B of the first coupler 4 is equal to the thread pitch of the first female thread 4A. The screw pitch of the head outer peripheral screw 20A of the lug screw 14 in the existing beam 11A is shown on the assumption that the screw pitch is smaller than the screw pitch of the outer peripheral screw 20A of the lug screw head in the next beam 11B. _{Instead, the thread pitch p B} of the second internal thread 7B of the second coupler 7 _{is larger than the thread pitch p A} of the first internal thread 7A, but the thread pitch of the first female thread 4A of the first coupler 4 is the second female thread. It is also possible to make the screw pitch of the outer peripheral screw of the head of the lug screw 14 in the existing beam 11A equal to the screw pitch of the outer peripheral screw of the lug screw head in the next beam 11B, which is larger than the screw pitch of 4B. In that case, the diameter of the head outer peripheral screw in the lug screw is made the same.

By the way, normally, as shown in FIG. 3C, there are a total of four screw-type joining mechanisms 2, one pair each on the top and bottom in one cross section of the beam, but depending on the size, the two are vertically and vertically in one cross section of the beam. There may be a total of two pairs. Further, if the column base of not only the existing column but also the next column is set as the rigid column base structure proposed by the present inventor in Japanese Patent Application No. 2016-160419, the details will be omitted here, but the column-beam frame Can be left as an unparalleled rigidly joined wooden rigid frame structure.

As can be seen from the above description, according to the present invention, the lug screws screwed into the two beams sandwiching the existing column are tightened by the screw type joining mechanism, so that the beams are arranged discontinuously. Strong joints are made, and by extension, the integrity with the columns sandwiched between the beams is significantly improved, and rigid joints between the columns and beams are achieved.

The threaded joining mechanism, which is arranged in the axial direction of the beam, is clearly a joint without initial backlash compared to the mechanism such as the gusset plate in the prior art, which is fixed from the side surface of the beam with a drift pin. There is no way to compare the improvement of the rigid joint of the pair. Since this screw-type joining mechanism is a rotary operation, even if the shaft assembly is distorted or deformed due to a large load, or if the wood becomes thin due to aging and rattling occurs, the second coupler can be further added. If tightened, the rigid joint state can be reproduced. Conversely, since the joint can be released by operating the second coupler, it is extremely easy to disassemble the framework, the amount of waste material generated can be reduced as much as possible, and for that matter, it can be reconstructed. As it is possible, there will be more and more ways to make it a mobile dwelling or a temporary housing that can be dismantled and stored.

1 ... Beam beam frame, 2 ... Screw type joining mechanism, 3 ... Wooden ramen structure, 4 ... First coupler, 4A ... First female screw, 4B ... Second female screw, 5 ... Connecting bolt, 6 ... Nut for bearing pressure , 7 ... 2nd coupler, 7A ... 1st internal thread, 7B ... 2nd internal thread, 11 ... Beam, 11A ... Existing beam, 11B, 11B _L , 11B _U ... Next beam, 11m ... Kiguchi, 11n ... The part where the beam size remains the same (the part with the large cross-sectional size) Kiguchi, 12 ... Pillar, 12A ... Existing pillar, 12B ... Next pillar, 14, 14A ... Lag screw, 17, 17 _L , 17 _U ... Through hole, 20A ... Head outer peripheral screw, 22 ... Stepped portion, 22a ... Stepped surface, 23 ... Beam outer concave recessed space, 25 ... Anchor bolt, 27, 27 _L , 27 _U ... Spacer, p _A ... First inside Thread pitch of screw, p _B ... Thread pitch of second internal thread.

Claims (1)

At least a pair of horizontal through holes were formed in the upper and lower parts of the wooden columns of both the existing columns and the next columns at the sites where the columns and beams are rigidly joined, and the through holes were screwed into the existing beams. A first metal coupler with a first female screw into which the outer peripheral screw of the head of the lug screw is engaged is loaded.
A step portion for reducing the cross-sectional dimension is formed on the beam arranged between the wooden columns, and the edge of the portion having a small cross-sectional dimension is on the side of the existing pillar with the step surface as a boundary, and the edge of the portion having a large cross-sectional dimension is formed. Formed on the side of the next pillar
The beam outer concave recessed space from the end of the wood having a small cross-sectional dimension to the stepped surface has a length that allows a joint to be connected to the second female screw provided on the anti-first female screw side of the first coupler.
Another lug screw on the extension line of the through hole is screwed into the existing column side in the next beam so as to project the head in which the outer peripheral screw is engraved from the stepped surface of the beam, and further. The lug screw is screwed into the next pillar side in the next beam so that the head on which the outer peripheral screw is engraved protrudes from the end of the wood facing the next pillar.
The connecting bolt as the joining tool is engaged with the second female screw, and the existing column is supported in the vicinity of the through hole by the nut hooked on the connecting bolt.
A second metal coupler as another joint is engaged with the connecting bolt by a first internal screw.
In the second coupler, a second internal screw that meshes with the head outer peripheral screw of the lug screw protruding from the stepped surface is formed on the anti-first internal screw side.
The second internal thread and the first internal thread are spirals in the same direction, but the screw pitch of the second internal thread is made larger than that of the first internal thread.
In the method for constructing a wooden rigid frame structure in which rigid bonding of columns and beams is achieved by a metal screw type joining mechanism including a first coupler, a connecting bolt, a nut for bearing pressure, and a second coupler described above.
First, in order to arrange the next beam at a predetermined position, a gap having a size that allows the connecting bolt and the second coupler to be arranged is created between the lower floor next beam and the existing column. Tilt the next pillar, and at that time, loosen the anchor bolt on the side of the existing pillar among the anchor bolts of the next pillar, and pull it so that the next pillar does not fall any further.
In this state, the next beam for the lower floor is suspended and placed at the joint for the lower floor, and the head outer screw of the lug screw screwed into the side of the wood end of the part with a large cross-sectional dimension is used as the through hole for the lower floor. The next beam for the upper floor is also suspended and placed in the joint for the upper floor, and the head outer screw of the lug screw that is screwed into the side of the end of the part where the beam dimensions are the same is used for the upper floor. Face the through hole,
Insert the first coupler into each through hole, engage each first female screw with the head outer peripheral screw protruding from the next beam until it reaches the screw bottom, and support the existing pillar side of the next beam.
The connecting bolts face the concave outer space of the beam formed by the stepped surface of the next beam, and the existing column side of the screw is engaged with the second female screw of the first coupler to the screw bottom, and the bearing plate and nut are arranged. Tighten the nut so that the bearing plate strongly presses the existing column, tightly fasten the next beam and the existing column, and in that state, connect the second coupler between the connecting bolt and the head outer peripheral screw protruding from the step surface. The second coupler is screwed deeply until it touches the nut, and these operations are also performed at the upper floor joint.
In this state, spacers are attached to the small end of each cross-sectional dimension of the next beam for the upper floor as well as for the lower floor, and the spacer is pulled up by pulling the next pillar and attached to the next beam for the lower floor. Is brought into contact with the existing beam, the second coupler is rotated to reduce the amount of screwing between the first internal screw and the connecting bolt, and the second internal screw is initially screwed to the head outer peripheral screw protruding from the stepped surface. If the next pillar is tilted to remove the spacer, the second coupler is advanced toward the head outer peripheral screw, and the second coupler is rotated (difference in screw pitch x number of rotations), the lag screw head and connecting bolts are connected. The lug screw head is moved by the thickness of the removed spacer, and at this time, the second coupler 7 in the four screw type joining mechanisms at the joint is rotated almost at the same time, and the anchor bolt of the next column is bolted. Tighten the loosened anchor bolts to make the next column stand upright, and the next beam for the upper floor is in an upright position with spacers left, where the space between the next column and the existing column is widened and the spacer is used. After that, the next beam for the upper floor is attached by the same operation as the operation at the joint for the lower floor, and the second coupler on all floors is fully tightened. ..

Images