JP2005171524A - Connection fitting, and connection structure between column and beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection fitting which ensures a predetermined pull-out resistance without increasing the beam depth, when a large pull-out resistance is required at a connection portion between columns and a beam, to thereby achieve superior productivity and workability, and to provide a connection structure between the columns and the beam which uses the connection fitting. <P>SOLUTION: The connection fitting 1 consists of a plate portion 12 which has through holes 121 formed therein, and a pipe portion 13 which has a halved portion 14 having a half-moon cross section, formed at one end thereof and allows the plate portion to be connected to the other end thereof, in a manner forming a battledore. Then the plate portions 12 of the connection fittings 1a, 1b are fitted into slits formed in end faces of the columns 3, 4, respectively, and the pipe portions 13 are fitted into respective mortises 51 formed in the beam 5, whereby the upper-layer column 3 and the lower-layer column 4 are connected together via the two connection fittings 1a, 1b. The pipe portions of the respective connection fittings 1 are coaxially aligned by combining the halving portions 14 with each other, and at least one bolt 22 is inserted into a through hole 131 penetrating through both the halving portions 14, whereby both the connection fittings are fixed to the beam 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a metal joint between a column and a beam suitable for a relatively small-scale wooden building such as a house, and a joint structure using the metal joint.

  In the wake of the Great Hanshin-Awaji Earthquake, it has been widely recognized that metal fittings in wooden buildings are important for ensuring the safety of the buildings, and it is a good idea to place bearing walls in a balanced manner. It has been. In order for the proof strength of the proof wall to be fully demonstrated, the junction of the stigma and column base provided on the side of the proof wall that establishes the addition of proof strength is extremely important, depending on the type and arrangement of the proof wall Joining hardware is required. Therefore, in order to ensure the strength performance at the joint between the pillar and the beam in addition to ensuring the rigidity in the horizontal plane of the wooden building, the present applicant, for example, with a bearing wall as described in Patent Document 1 Proposed joint hardware for use in joints.

This metal joint is formed by integrating a steel plate portion and a pipe portion into a battledore shape. The plate portion is inserted into slits formed at the upper and lower ends of the column, and is joined to the column by drift pins inserted from the side surfaces of the column into appropriately provided pin holes. Further, the pipe portion is inserted into a mortise formed in the beam, and joined to the beam material by a drift pin inserted from the side surface of the beam into an appropriate number of pin holes. As a result, at the side of the highly rigid wall surface during an earthquake, the seismic energy can be sufficiently absorbed by resisting the pulling force acting on the column.
JP 2003-253789 A

  In the above configuration, the number of pin holes provided in the plate portion and the pipe portion is appropriately selected according to the required pulling strength, and the metal fitting inserted into the beam as the pulling force acting on the column increases. The number of pin holes in the pipe part and the number of drift pins are increased to increase the pulling strength. However, when the column members are joined to the top and bottom of the beam on the same core, the two pipe parts fit into the same mortise from both the top and bottom surfaces of the beam, so that the required pulling strength is achieved. If the number of pin holes in the pipe portion and the number of drift pins are increased in order to ensure, the beam length must be increased correspondingly. Then, not only the member cost becomes high, but also the hole processing takes time, and there is a possibility that the accommodation becomes worse.

  The present invention has been made in view of such circumstances, and even when a large pulling strength is required at a joint between a lower column and an upper column that are erected with a beam interposed therebetween, the beam is increased. It is an object of the present invention to provide a metal joint that can ensure a predetermined pulling strength without causing a failure, and a column-beam joint structure using the metal joint.

  In order to solve the above-mentioned problems, the present invention is a metal fitting for joining a column and a beam in a beam-winning state, and the plate portion having a drift pin or a bolt fixing through hole is fixed to the drift pin or the bolt. Is connected to one end of a pipe portion having a through-hole for use in the shape of a feather plate, and the other end of the pipe portion is a half-moon-shaped cross-sectional portion, and a through-hole for fixing a drift pin or a bolt is also provided in the phase-less portion. It is provided.

  Further, the present invention is a joint structure in which a lower layer column and an upper layer column, which are erected with a beam interposed therebetween, are joined via two joint hardwares that form a pair in the vertical direction, A plate portion having a through hole for fixing a drift pin or bolt is coupled to one end of a pipe portion having a through hole for fixing a drift pin or bolt, and the other end of the pipe portion has a half-moon-like phase. A through hole for fixing a drift pin or a bolt is also provided in the phase gap. In addition, the end of each column is formed with a slit that opens into the end surface of the column and into which the plate portion of the joint metal fitting is fitted, and the contact portion of the column end surface of the beam penetrates in the direction of the beam to join the joint metal A mortise hole is provided in which the pipe portion is inserted. And the pipe part of the joint metal joining the lower layer pillar on the lower surface side of the beam and the joint metal pipe part joining the upper layer pillar on the top surface side of the beam are inserted into the mortise from both the upper and lower sides. Then, the respective phase missing portions are overlapped with each other, and at least one drift pin or bolt is inserted into a through hole penetrating both phase missing portions, so that both joint hardware are fixed to the beam.

  According to these inventions, it is possible to superimpose the phase missing portion formed in the pipe portion of one joining hardware and the phase lacking portion of the other joining hardware and arrange them coaxially. Therefore, at the joint between the lower column and the upper column that are erected with the beam in between, the pipe part of these joint hardware is inserted into the tenon formed in the beam from the top side and the bottom side. By inserting and polymerizing both phase missing parts, the two pipe parts are arranged coaxially and the through hole also matches, and by inserting a drift pin or bolt into this through hole and tightening it, the efficiency Two joint hardwares are often connected to each other so that a column and a beam can be joined. Further, in the conventional structure, a downward tensile force and an upward tensile force act on the beam, and the central portion of the beam may be split up and down. However, in the present invention, the downward tensile force and the upward tensile force are Since the force is balanced through a drift pin or bolt that penetrates the phase gap, the central portion of the beam can be prevented from splitting.

  By adopting the joint metal and joint structure of the present invention at the joint between the lower layer column and the upper layer column that are erected across the beam, the specified pull-out strength is exhibited without increasing the beam length. Therefore, it is possible to prevent the member cost and the processing cost from increasing. In addition, in such a joint structure, since the two phase notches of the two joint hardware are connected by sharing at least one drift pin or bolt, the number of drift pins or bolts to be used can be reduced, and production can be performed. And excellent workability.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a joint metal and laminated material joint structure according to the present invention will be described below with reference to the drawings.

  First, the metal joint of the present invention will be described. FIG. 1 is a front view showing a metal joint according to the present invention, FIG. 2 is a longitudinal sectional view of the metal joint shown in FIG. 1, and FIG. 3 is a cross-sectional view of a pipe portion of the metal joint.

  The metal joint 1 includes a steel plate portion 12 and a pipe portion 13. A fitting piece 122 is formed on the plate portion 12 and is fitted to one end of the pipe portion 13. The pipe portion 13 and the plate portion 12 are connected to each other. It is integrated into a battledore shape by welding or the like.

  The plate part 12 and the pipe part 13 are provided with a plurality of through-holes 121 and 131 for fixing the plate part 12 and the pipe part 13 to the column beam by drift pins or bolts, respectively. Two through holes 121 in the plate portion 12 are arranged side by side so that the drift pins are orthogonal to the plane of the plate portion 12. The through hole 131 provided in the pipe portion 13 is also formed so as to penetrate in the same direction as the through hole 121 of the plate portion 12.

  Further, as shown in the drawing, the other end of the pipe portion 13 is a phase-out portion 14 having a half-moon shape in cross section. As for the phase missing part 14, the front-end | tip part of the pipe part 13 is made into a half shape, The flat board | plate material is welded to this part, and the contact surface 141 is formed. The welded portion is joined so as not to protrude outwardly from the outer diameter of the contact surface 141 and the pipe portion 13. Thereby, the phase missing portion 14 is configured to be able to overlap with the phase missing portion 14 formed in the pipe portion 13 of the other metal fitting 1.

  The through hole 132 provided in the phase missing portion 14 is provided so as to penetrate the peripheral surface of the pipe portion 13 and the contact surface 141. It is sufficient that at least one through hole 132 is formed in the phase missing portion 14.

  Next, a column-beam joint structure according to the present invention will be described with reference to FIGS.

  The joint structure of the present invention has a configuration in which an upper layer column 3 and a lower layer column 4 which are erected with a beam 5 interposed therebetween are joined via two joint hardwares 1a and 1b which form a pair of upper and lower sides. It has become.

  At the end of each column 3, 4, slits 31, 41 are formed in the column width direction that open to the column end surface and into which the plate portion 12 of the metal joint 1 is inserted. The slits 31 and 41 formed in the pillars 3 and 4 can be processed with a small-diameter circular saw having a diameter of about 30 cm, and the slit processing can be easily performed. Further, a mortise 51 is provided in the contact portion of the column end surface of the beam 5 so as to pass through the beam in the beam direction and into which the pipe portion 13 of the metal joint 1 is inserted.

  The metal joint 1a is arranged such that the pipe portion 13 is inserted into the mortise 51 of the beam 5 from the top surface side, and the plate portion 12 is inserted into the slit 31 of the column 3 of the upper layer portion. Further, the pipe portion 13 of the metal joint 1b is also inserted from the lower surface side of the beam 5, and the plate portion 12 is inserted into the slit 41 of the column 4 in the lower layer portion. Here, on the top surface side of the beam 5, the pipe portion 13 of the joint hardware 1 a that joins the upper layer column 3 and the pipe portion 13 of the joint hardware 1 b that joins the lower layer column 4 are respectively the pipe portions 13. The end portions 14 are overlapped with each other and arranged coaxially.

  The joint hardware 1a and 1b fitted across the columns 3 and 4 and the beam 5 in this way are fitted into the through holes 121 and 131 from the side surfaces (front or back side in FIG. 4) of the columns 3 and 4 and the beam 5. The pillars 3, 4 and the beam 5 are integrally joined by a plurality of inserted drift pins 21, 22 (or bolts). In addition, one drift pin 22 (or bolt) is also fitted into the through hole 132 that penetrates the phase-out portions 14 and 14 of each pipe portion 13 arranged on the same axis, and two joint hardware 1a. , 1b are connected to each other. The shear strength of the inserted drift pins 21 and 22 (or bolts) secures the strength of the joint portion by the joint hardware 1a and 1b, and the slits 31 and 41 of the columns 3 and 4 and the beam. The material end portion in which the five mortise holes 51 are formed can be fastened.

  Therefore, these two metal fittings 1a and 1b can be obtained by superimposing the phase missing portion 14 in one mortise 51 and joining together by sharing at least one drift pin 22 (or bolt). The pipe parts 13 and 13 can be connected. Of the three drift pins 22 (or bolts) that are inserted into the metal fittings 1a and 1b, one of the three drift pins 22 (or bolts) that penetrates the phase missing portion 14 is shared, and the upper two join the upper layer column 3. It acts on the joint hardware 1a to be joined, and the two lower parts act on the joint hardware 1b to join the lower pillar 4 to ensure the required joint strength. As a result, it is possible to reduce the member cost and the processing cost, and even when a high pulling strength is required, a rational joint structure that can resist the pulling force of the column without increasing the beam length is provided. be able to.

  In such a joint structure, the joint hardware 1 can be appropriately selected in consideration of the pulling strength required for the columns 3 and 4, the vertical load from the upper floor, and the like, and can be used in combination with different types. . That is, the metal joint 1 is not limited to the above-described configuration, and the number of through holes 131 and the pipe length of the plate portion 12 and the pipe portion 13 can be configured according to the required pulling strength.

  For example, in the metal joint 1 (1c) shown in FIGS. 6 and 7, four through holes 121 are evenly arranged in the plate portion 12. The pipe portion 13 is formed longer than the pipe length of the metal joint 1 (1a, 1b), and three through holes 131 are formed in the pipe cylindrical portion, and one through hole 132 is formed in the phase missing portion 14. , Each provided. The through-hole 132 formed in the phase missing portion 14 is provided so as to penetrate the peripheral surface of the pipe portion 13 and the contact surface 141 in the same manner as the joint hardware 1 (1a, 1b).

  In addition, the metal fitting 1c is formed with a slit corresponding to the thickness of the plate portion 12 at the tip portion of the pipe portion 13, and the pipe portion 13 sandwiches the plate portion 12 and is integrated into a blade plate shape by welding or the like. . By adopting such a configuration, the metal joint 1c can secure a pulling strength of about 50 kN per piece.

  As described above, in the present invention, by appropriately designing the size of the plate portion 12 of the metal fitting 1 and the arrangement and number of the through holes 121 and the length of the pipe portion 13 and the number of the through holes 131 and 132, In addition, sufficient bonding strength and stickiness can be exhibited.

  The joint metal structure and the joint structure of a column and a beam according to the present invention are suitable for satisfying the strength performance of a joint between a column and a beam, such as a joint of a column head and a column base beside a load bearing wall having high rigidity in a wooden building. It can be used for the construction, and the construction method that can withstand even an earthquake can be realized by strengthening the main part in structural strength.

It is a front view which shows the joining metal fitting which concerns on this invention. It is a longitudinal cross-sectional view of the metal joint of FIG. It is a cross-sectional view of the pipe part of the metal joint according to the present invention. It is a front view which shows the joining structure of the pillar and beam which concerns on this invention. FIG. 5 is a cross-sectional view of FIG. 4. It is a front view which shows the other example of the joining metal fitting which concerns on this invention. It is a side view of the joint metal fitting of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joining hardware 1a, 1b, 1c Joining hardware 12 Plate part 121 Through-hole 13 Pipe part 131 Through-hole 132 Through-hole (phase missing part)
14 Phase missing part 141 Contact surface 21 Drift pin 22 Bolt 3 Column (upper layer part)
31 Slit 4 Pillar (lower layer)
41 Slit 5 Beam 51 Mortise

Claims (2)

  A metal fitting for joining a column and a beam in a beam-winning state, and a plate portion having a through hole for fixing a drift pin or bolt is attached to one end of a pipe portion having a through hole for fixing a drift pin or bolt. A metal joint, characterized in that it is joined in the form of a battledore, and the other end of the pipe portion is a half-moon-shaped phase-out portion, and a drift pin or bolt fixing through hole is also provided in the phase-out portion. A lower layer column and an upper layer column that are erected with a beam sandwiched between them are joined via two joint hardware that form a pair of upper and lower,
Each of the metal fittings has a plate portion having a through hole for fixing a drift pin or bolt, coupled to one end of a pipe portion having a through hole for fixing a drift pin or bolt, and the other end of the pipe portion has a cross section. It is a half-moon-shaped phase cutout, and this phase cutout is also provided with a through hole for fixing a drift pin or bolt,
At the end of each column is formed a slit that opens into the column end surface and into which the plate portion of the joint metal is fitted, and at the contact portion of the column end surface of the beam penetrates in the direction of the beam and joins the joint metal pipe A mortise is inserted into the part,
The pipe part of the joint metal that joins the lower layer pillar on the lower surface side of the beam and the joint metal pipe part that joins the upper layer column on the top surface side of the beam are inserted into the mortise from above and below both sides. A column and a beam characterized in that each phase missing portion is superposed on each other, and at least one drift pin or bolt is inserted into a through-hole penetrating both phase missing portions so that both joint hardware are fixed to the beam. Bonding structure.

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