JP6536391B2 - Connection member and joint structure of floor joists - Google Patents

Description

  The present invention relates to a connection member and a joint structure of floor joists provided in a building.

  Conventionally, for example, Patent Document 1 discloses an end portion of an I-shaped beam having an I-shaped cross section to be fixed to a cross member to prevent lifting and floor noise of the end of the I-shaped beam. Type I beam mounting hardware has been proposed. In addition, for example, architectural hardware and the like disclosed in Patent Documents 2 and 3 are proposed as those used when attaching a floor joist to the end joists of the wall upper frame.

  The I-shaped beam mounting hardware disclosed in Patent Document 1 includes a pair of facing vertical walls and a receiving wall connecting lower ends of both vertical walls, and a nail hole is formed in each wall except the receiving wall. And causing the locking claws engaged with the inner surface of the lower flange of the I-shaped beam to project inwardly to the pair of vertical walls, and the respective locking claws being directed outward It is provided to be elastically deformable.

  The building hardware disclosed in Patent Document 2 has a pair of side wall portions, a connecting portion connecting the pair of side wall portions, and a mounting portion for attaching the respective end portions of the pair of side wall portions to end joists, The joists are sandwiched between them, and each of the pair of side walls has a notch at the end joist side and the part which becomes the wall upper frame side, and is connected by the connecting part at the bottom side excluding the notch There is.

  The joining method of the beam and the girder disclosed in Patent Document 3 welds the gusset plate to the web of the girder and welds the guide plates on both sides of the gusset plate, and the gap between the guide plates is the upper end It is configured to expand in a V-shape at the part. The beam is suspended by lowering the unit floor so that the lower flange of the beam end is notched and the web of this notch is inserted into the gap between the guide plates, and the upper flange of the beam end is a guide plate It is supported in contact with the upper end of the

Utility model registration 3126276 gazette JP, 2005-188213, A Unexamined-Japanese-Patent No. 2004-278210

  The I-shaped beam attachment hardware disclosed in Patent Document 1 is provided with a locking claw formed so as to protrude from a pair of vertical walls so as to be elastically deformable outward, and the lower flange of the I-shaped beam and the locking claw Can be prevented from rising of the end of the I-shaped beam. However, in the I-shaped beam attachment hardware disclosed in Patent Document 1, the locking claw projects longitudinally toward the lower flange of the I-shaped beam, and the lower flange is restrained by the bending rigidity in the out-of-plane direction of the locking claw. Therefore, the rigidity at the engaging portion is not sufficiently secured. For this reason, the I-shaped beam attachment hardware disclosed in Patent Document 1 deforms so that when the lower flange of high rigidity such as a steel beam is engaged with the locking claw, the locking claw is flipped up, There is a possibility that the fixation to the horizontal member will be insufficient.

  Further, in the building hardware disclosed in Patent Document 2, in the floor structure of the wooden two-by-four house, the dimensions of the end of the wood and the size of the floor of the thin lightweight steel do not match, and the upper surfaces of both do not match. Also, it is possible to obtain an appropriate joint without changing the members. However, in the building hardware disclosed in Patent Document 2, the floor joists of thin light-weight steel are supported by the pair of side wall parts and the connection part, and can not support floor joists such as lightweight H-shaped steel. . In addition, the building hardware disclosed in Patent Document 2 is a restraint for preventing the rise of floor joists of thin steel lightweight steel when temporarily supporting the floor joists of thin steel lightweight steel with a pair of side wall portions and connecting portions. Since there is no element, there has been a problem that the temporary support of the floor joist of thin light-weight steel sheet becomes insufficient.

  Furthermore, in the method of joining the beamlet and the girder disclosed in Patent Document 3, the web of the beamlet is inserted into the gap between the guide plates, and the gusset plate and the guide plate support the beamlets. However, the method of joining small beams and large beams disclosed in Patent Document 3 requires not only welding of large beams, gusset plates and guide plates, but also notch processing of lower flanges of small beams, resulting in the number of parts and processing There is a problem that the material cost and the construction cost increase because of the time and effort. And the joining method of the girder and the girder disclosed in Patent Document 3 has no restraint element for preventing the grit of the girder when temporarily supporting the girder with the guide plate welded to the gusset plate. Therefore, there is a problem that temporary support of the beam becomes insufficient.

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to increase the efficiency of lifting work of floor joists while securing high restraint against floating of floor joists. An object of the present invention is to provide a connection member and a joint structure of a floor joist with improved.

  The connecting member of the floor joist according to the first invention is a connecting member of floor joist provided in a building, comprising a connecting member for joining a floor joist on which a flange and a web are formed to a surrounding member, the connection The member has a pair of side plates projecting from the surrounding member and separated from each other, and a receiving plate extending in the width direction of the floor joist, surrounded by the pair of side plates and the receiving plate, and the floor joist being inserted The side plate is formed with a projecting piece that protrudes laterally in the material direction of the floor joist in the insertion portion on one or both of the pair of side plates. The projecting piece is characterized in that a lower end edge is formed at a position separated in the height direction from the receiving plate, and elastically deforms in the out-of-plane direction of the side plate.

  In the floor joist connecting member according to the second aspect of the invention, in the first aspect of the invention, the projecting piece is formed by curving or bending in the lateral direction in the material axial direction of the floor joist.

  In the floor joist connecting member according to the third invention, in the first invention or the second invention, the projecting piece is formed with an upper end edge so as not to protrude toward the inside of the insertion portion, and The lower end may be formed to protrude inward.

  In the floor joist connecting member according to the fourth invention, in any of the first invention to the third invention, the projecting piece is formed so as to open laterally toward the surrounding member side in the material axial direction of the floor joist It is characterized by being.

  In the floor joist connecting member according to the fifth invention, in any one of the first invention to the fourth invention, the protruding piece has a notch height in the height direction at the side plate of 0 of the notch width in the material axial direction. It is characterized by having a size of .75 or more.

  A joint structure of floor joists according to a sixth invention is a joint structure of floor joists provided in a building, and a floor joist on which a flange and a web are formed, and a connection member for joining the floor joist to a surrounding member And the connecting member includes a pair of side plates projecting from the surrounding member and separated from each other, and a receiving plate extending in the width direction of the floor joist, and surrounded by the pair of side plates and the receiving plate An insertion portion through which the floor joists are inserted is formed, and the side plates project laterally from one or both of the pair of side plates in the material axis direction of the floor joists at the insertion portions. A piece is formed, and a lower end edge is formed at a position separated from the receiving plate in the height direction to form the projecting piece so as to be elastically deformed in the out-of-plane direction of the side plate. The flanges are paired in the longitudinal direction The web extending in the height direction is formed at an intermediate portion or one end in the width direction, and a lower flange serving as the flange under the floor joists is between the lower end edge of the projecting piece and the receiving plate. It is characterized in that it is to be joined with the receiving plate in the arranged state.

  In the joint structure of a floor joist according to a seventh invention, in the sixth invention, the floor joist is formed with the web extending in the height direction at an intermediate portion in the width direction of the flange which is paired in the height direction. It is characterized in that a lightweight H-shaped steel or a thin lightweight steel in which the web is formed from one end in the width direction of the flange is used.

  According to the first to seventh inventions, the lower flange of the floor joist is sandwiched between the receiving plate and the projecting piece, and the movement of the floor joist in the height direction is restrained, and the pair of side plates is below the floor joist Since the flange is pinched in the width direction and movement in the width direction of the floor joists is restrained, even in the state of temporary support before bolting the receiving plate of the connection member and the lower flange of the floor joists, etc., It becomes possible to increase the restraint force of the floor joist temporarily supported by the connecting member.

  According to the first invention to the seventh invention, the protruding pieces of the connecting member protrude laterally, so that the protruding pieces exert in-plane shear resistance against the rise of the floor joists, and the floor joists are against the rise of the floor joists. It becomes possible to secure high restraining force.

  According to the first invention to the seventh invention, after the floor joist is dropped and temporarily supported, the crane is immediately released from the temporarily supported floor joist so that lifting work of the floor joist at another joint location As a result, it is possible to efficiently carry out floor joist lifting work sequentially to improve the efficiency of floor joist lifting work.

  According to the first to seventh inventions, the complicated operation such as welding of the gusset plate and the guide plate as in the prior art or the process of cutting the lower flange of the floor joist etc. is not required, and the manufacture is high. Since the floor joists can be supported using the connecting members, it is possible to reduce the number of parts and the processing time, and to reduce the material cost and the construction cost.

  In particular, according to the second aspect of the present invention, the projecting piece is formed so as to protrude laterally and is curved or bent to increase the in-plane resistance of the curved or bent projecting piece, thereby in-plane shearing by the projecting piece. It is possible to improve the resistance.

  In particular, according to the third aspect of the present invention, the upper end edge of the projecting piece is formed so as not to project into the insertion portion, whereby when the floor joist is dropped into the insertion portion, the lower flange of the floor joist and the upper end edge of the projecting piece It becomes difficult to interfere, and it becomes possible to make a floor joist penetrate the penetration part smoothly.

  In particular, according to the fourth aspect of the present invention, even when the upper end edge of the projecting piece projects into the insertion portion, the projecting piece is formed by opening laterally toward the surrounding member side in the material axial direction of the floor joist to form the projecting piece. Interference with the lower flange of the floor joist and the upper edge of the projecting piece can be reduced by a method of inclining the joist in the axial direction of the joist.

  In particular, according to the fifth aspect of the invention, the in-plane shear resistance due to the projecting piece is achieved by setting the notch height in the height direction of the projecting piece to at least 0.75 times the notch width in the material axial direction of the projecting piece. It becomes possible to secure sufficient power.

  In particular, according to the sixth invention, from the state where the floor joist is temporarily supported by the connection member, the lower flange of the floor joist and the receiving plate of the connection member are further joined by screw joint, bolt joint, nail joint or weld joint. By being firmly fixed, it becomes possible to prevent floor noise reliably.

  In particular, according to the seventh invention, in addition to floor joists with a span length in the material axial direction of about 3 m to 4 m, the invention is also applied to mid to large span joists of about 5 m to 8 m, By using floor joists of lightweight H-section steel or thin-plate light-weight shaped steel lighter than conventional H-section steel etc., it becomes possible to easily carry out lifting work of floor joists.

It is a perspective view showing a building provided with a joint structure of floor joists to which the present invention is applied. (A) is a cross-sectional view showing a floor joist having a substantially H-shaped cross section used for the joint structure of floor joists to which the present invention is applied, and (b) is a cross-sectional view showing a floor joist having a substantially C-shaped cross section . It is a perspective view which shows the bonded structure of the floor joist to which this invention is applied. (A) is a front view which shows the connection member attached to the surrounding member by the bonded structure of the floor joist to which the present invention is applied, (b) and (c) are front views which show the modification of the back plate It is. (A) is a side view which shows the connection member attached to the surrounding member by the joining structure of the floor joist to which the present invention is applied, and (b) is a plan view showing the projecting piece opened to the surrounding member side (C) is a top view which shows the protrusion piece opened to the opposite side of the surrounding member. (A) is a top view which shows the protrusion piece which inclined in the substantially linear shape and protruded sideways by the junction structure of the floor joist to which this invention is applied, (b) is a top view which shows the curved protrusion piece (C) is a top view which shows the bent protruding piece. (A) is a front view which shows the connection member in which the substantially rectangular shaped protrusion piece was formed by the bonded structure of the floor joist which applied this invention, (b) is the AA sectional view taken on the line. (A) is a front view which shows the connection member in which the substantially triangular shaped protrusion piece was formed by the bonded structure of the floor joist which applied this invention, (b) is the AA sectional view taken on the line. It is a perspective view which shows the upper end edge of the protrusion piece formed so that it might not protrude to the penetration part by the bonded structure of the floor joist to which this invention is applied. It is a front view which shows the floor joist of cross-sectional substantially H-shape penetrated by the insertion part of a connection member by the bonded structure of the floor joist to which this invention is applied. It is a front view which shows the floor joist of cross-sectional substantially C-shape penetrated by the penetration part of a connection member by the bonded structure of the floor joist to which this invention is applied. (A) is a front view which shows the lower flange of a floor joist joined to a receiving board by the junction structure of a floor joist to which the present invention is applied, and (b) is the AA line sectional view. (A) is a side view which shows the state which the crosswise protrusion piece exhibited in-plane shear resistance force by the bonded structure of the floor joist to which this invention is applied, (b) is the front view. (A) is a side view which shows the state which deform | transforms so that the longitudinally oriented latching claw may turn up with the conventional I-shaped beam attachment hardware, (b) is the front view. It is a front view which shows the lower flange of the floor joist inserted so that it may not interfere with the upper end edge of a protrusion in the joining structure of floor joists to which the present invention is applied. It is a graph which shows the relationship between the elastic limit rate and the ratio of the notch height with respect to notch width when a protrusion piece exhibits in-plane shear resistance.

  Hereinafter, the connection member 4 of a floor joist to which the present invention is applied and an embodiment for carrying out the joint structure 1 will be described in detail with reference to the drawings.

  As shown in FIG. 1, the joint structure 1 of the floor joists to which the present invention is applied is mainly a relatively small scale building 8 such as a single-family house or a relatively large house such as a store combination house or a nursing home for the elderly In a large scale building 8, it is provided in order to join floor joists 2 which support flooring 80 grade. In addition, the joint structure 1 of the floor joist to which the present invention is applied may be provided not only to the framework method shown in FIG. 1 but also to a framework wall construction method such as wooden two by four etc. or other construction methods requiring floor joist.

  As for the floor joists 2, a section steel of a predetermined cross-sectional shape is used, and the end in the material axial direction X is joined to the surrounding member 3 such as the end joists 31 or the columns 32. The surrounding members 3 such as the end joists 31 or the pillars 32 are provided on the outer periphery of the building 8 or the like by using solid wood, laminated wood, wood such as LVL or CLT.

  As shown in FIG. 2A, in the cross-sectional direction with respect to the material axial direction X, H-section steel having a cross-sectional substantially H-shape is used as the floor joists 2. Here, H-shaped steel may be manufactured by any manufacturing method such as assembly by roll forming, arc welding, laser welding etc., assembly by electrical resistance welding, and relatively narrow I-shaped steel It may be used. The floor joists 2 are not limited to this, and as shown in FIG. 2 (b), a channel steel or a lip-formed channel steel or the like formed in a substantially C-shaped cross section may be used. Here, the channel steel or ripped channel steel or the like may be manufactured by any manufacturing method such as roll forming, press forming and the like.

  As shown in FIG. 2, the floor joists 2 are formed with a flange 21 extending in the width direction Y and forming a pair in the height direction Z, and a web 24 extending in the height direction Z. The floor joists 2 are formed such that the upper flange 22 to be the upper flange 21 and the lower flange 23 to be the lower flange 21 are connected by the web 24 extending in the height direction Z so as to be substantially parallel to each other Ru.

  In the floor joists 2, upper and lower end portions of the height direction Z of the web 24 are connected to the middle portion 21a or one end portion 21b of the width direction Y of the pair of flanges 21 to connect the upper flange 22 and the lower flange 23 and the web 24 are formed substantially orthogonal to each other. The floor joists 2 project on both sides or one side of the web 24 in the width direction Y, and a pair of flanges 21 is formed.

  As shown in FIG. 2A, the floor joists 2 are webs from the middle portion 21a of the upper flange 22 and the lower flange 23 in the width direction Y when an H-shaped steel formed to have a substantially H-shaped cross section is used. It is desirable to use a lightweight H-section steel in which 24 is formed. Here, lightweight H-section steel refers to H-section steel having a thickness of 12 mm or less of the flange 21 and the web 24 manufactured by roll forming, assembly by laser welding, assembly by electrical resistance welding, assembly by arc welding, etc. Say

  In the floor joists 2 of the lightweight H-shaped steel, for example, the height dimension H extending in the height direction Z is about 80 mm to 450 mm, and the plate thickness dimension t1 of the web 24 is about 2.3 mm to 6 mm. In the floor joists 2 of the lightweight H-shaped steel, the width dimension B extending in the width direction Y is about 40 mm to 200 mm, and the plate thickness dimension t2 of the flange 21 is about 2.3 mm to 12 mm.

  As shown in FIG. 2 (b), the floor joists 2 are webs from one end 21b of the upper flange 22 and the lower flange 23 in the width direction Y when a channel steel formed to have a substantially C-shaped cross section is used. It is desirable to use a thin-sheet light-weight shaped steel in which 24 is continuously formed by bending or the like.

  For example, the height dimension H extending in the height direction Z is about 89 mm to 300 mm, and the width dimension B extending in the width direction Y is about 30 mm to 50 mm. Further, in the case of the floor root 2 of the thin lightweight steel plate, the plate thickness dimension t3 of the flange 21 and the web 24 is about 0.8 mm to 2.2 mm.

  The joint structure 1 of the floor joist to which the present invention is applied is, as shown in FIG. 3, a floor joist 2 formed of the flange 21 and the web 24 and a connecting member 4 for joining the floor joist 2 to the surrounding member 3. , And is provided at a joint where the floor joists 2 and the surrounding members 3 are substantially orthogonal to each other.

  The connection member 4 of the floor joist to which the present invention is applied is a pair of side plates 41 projecting from the side surface 30 of the surrounding member 3 and extending in the height direction Z, and a receiving plate projecting from the side surface 30 of the surrounding member 3 extending in the width direction Y 42 and, optionally, a back plate 40 that is in contact with the side surface 30 of the peripheral member 3 substantially orthogonal to the floor joists 2.

  The connecting member 4 is formed by bending a substantially flat steel plate or the like so that the back plate 40, the pair of side plates 41, and the receiving plate 42 are substantially orthogonal to each other and formed into a substantially flat plate shape. The back plate 40 is attached to the side surface 30 of the surrounding member 3 by screw bonding or bolt bonding or the like.

  The connecting member 4 is separated from each other in the width direction Y to form a pair of side plates 41, and is surrounded by the pair of side plates 41 and the receiving plate 42 to form an insertion portion S. The connecting member 4 has a pair of side plates 41 disposed on both sides in the width direction Y, and a receiving plate 42 disposed below the height direction Z, and the floor joists 2 are inserted from above in the height direction Z It will be inserted into S.

  For example, as shown in FIG. 4A, the back plate 40 is formed so as to extend continuously in the width direction Y from one end of each side plate 41 in the material axial direction X toward the outside D of the insertion portion S. Be done. The back plate 40 is not limited to this, and as shown in FIG. 4B, extends in the width direction Y toward the inner side E of the insertion portion S, and, if necessary, each material axis of the pair of side plates 41 It may be constructed to be continuous in the width direction Y up to one end in the direction X. Further, as shown in FIG. 4C, the back plate 40 may be provided without being continuous in the width direction Y from one end of each side plate 41 in the material axial direction X.

  The receiving plate 42 is formed to extend in the width direction Y, so that the upper surface 42 a is disposed on the inner side E of the insertion portion S, and is bridged to the lower ends 41 a of the pair of side plates 41 as necessary. The receiving plate 42 is formed at a position continuing from the lower end portion 41a in the height direction Z of each side plate 41, or may be formed at a position separated in the height direction Z from the lower end portion 41a of each side plate 41. Good.

  As shown in FIG. 5, the pair of side plates 41 separates the outer side D and the inner side E of the insertion portion S in the width direction Y by being arranged substantially parallel to each other. Each side plate 41 extends in the material axial direction X and the height direction Z and is formed into a substantially flat plate, so that the material axial direction X and the height direction Z become an in-plane direction, and the outer side D of the insertion portion S The width direction Y separating from the inner side E is the out-of-plane direction.

  In the side plate 41, a protruding piece 5 is formed on one or both of the pair of side plates 41 so as to protrude toward the inner side E of the insertion portion S in the width direction Y. As shown in FIG. 5A, the side plate 41 is subjected to a notch processing or the like extending in the height direction Z on a steel plate or the like formed in a substantially flat plate shape, whereby the upper end edge 5a to the lower end in the height direction Z A projecting piece 5 of a predetermined notch height α is formed continuously to the edge 5 b.

  As shown in FIG. 5 (b) and FIG. 5 (c), the side plate 41 is connected to the side plate 41 by carrying out notch processing or the like extending in the height direction Z, as shown in FIGS. At the same time, the front end 5 d of the protruding piece 5 is separated from the side plate 41 in the width direction Y toward the inside E of the insertion portion S. In the side plate 41, a projecting piece 5 having a predetermined notch width β is formed continuously from the proximal end 5c to the distal end 5d in the material axial direction X.

  As shown in FIG. 5, the side plate 41 is formed by extending in the height direction Z in a direction in which the base end 5 c and the tip 5 d of the protruding piece 5 intersect the top surface 42 a of the receiving plate 42. At this time, in the side plate 41, the projecting piece 5 formed on the inner side E of the insertion portion S inclines in the material axial direction X from the base end 5c to the distal end 5d of the projecting piece 5, and becomes the material axial direction X. It will protrude sideways.

  In addition, as shown in FIG. 5B, the projecting piece 5 is disposed so that the distal end 5d is disposed closer to the back plate 40 than the proximal end 5c, so that the projecting piece 5 is directed laterally toward the surrounding member 3 in the material axial direction X. It will open to the In addition, as shown in FIG. 5C, the protrusion 5 is directed to the opposite side of the surrounding member 3 in the material axial direction X by the base end 5c being disposed closer to the back plate 40 than the tip 5d. It will open sideways.

  As shown in FIG. 6A, the projecting piece 5 projects laterally from the proximal end 5c to the distal end 5d in the material axial direction X, and is inclined substantially linearly in the material axial direction X. . Further, the projecting piece 5 may be protruded in the lateral direction in the material axis direction X, and may be curved in a substantially arc shape or the like as shown in FIG. 6B, as shown in FIG. It may be bent in a substantially U-shape or the like.

  As shown in FIG. 7A, the lower end 5b of the projecting piece 5 is formed at a position separated from the upper surface 42a of the receiving plate 42 in the height direction Z, and the projecting piece 5 is elastic in the out-of-plane direction of the side plate 41. It will be deformed. At this time, as shown in FIG. 7B, the projecting piece 5 has a gap 50 which has a predetermined gap dimension γ in the height direction Z, in particular, between the upper surface 42a and the lower end 5b of the receiving plate 42. It is formed.

  As shown in FIG. 7, the projecting piece 5 extends in the height direction Z so that the proximal end 5c and the distal end 5d are substantially parallel to each other, and the upper end 5a and the lower end 5b are substantially parallel to each other By extending in the material axis direction X as described above, it is formed in a substantially rectangular shape.

  Further, as shown in FIG. 8, the protruding piece 5 may be formed in a substantially triangular shape with the upper end edge 5 a as a vertex and the lower end edge 5 b as a bottom side. At this time, one or both of the proximal end 5c and the distal end 5d of the projecting piece 5 are formed to be inclined in the height direction Z, for example, the proximal end 5c and the lower end 5b are substantially orthogonal to each other. It is formed in a substantially right triangle shape or the like.

  When the projecting piece 5 is formed in a substantially rectangular shape shown in FIG. 7, as shown in FIGS. 9A and 9B, only the upper end edge 5a is partially bent or the like. The upper end edge 5 a may be disposed substantially in the same plane as the side plate 41. Further, when the protruding piece 5 is formed in a substantially triangular shape shown in FIG. 8, as shown in FIG. 9C, the upper end edge 5a is formed in a substantially acute angle shape as a substantially triangular apex. The upper end edge 5 a may be disposed substantially in the same plane as the side plate 41.

  At this time, as shown in FIG. 9, the upper end 5a of the projecting piece 5 is prevented from protruding toward the inner side E of the insertion portion S by arranging the upper end 5a in substantially the same plane with the side plate 41. Is formed, and is protruded toward the inner side E of the insertion portion S to form the lower end edge 5b. The upper end 5a may be disposed so that the projecting piece 5 protrudes to the outer side D of the insertion portion S in addition to the upper end 5a being disposed substantially in the same plane as the side plate 41.

  The base end 5c and the tip end 5d of the projecting piece 5 are received by the receiving plate 42 regardless of whether the projecting piece 5 is formed in the substantially rectangular shape shown in FIG. 7 or in the substantially triangular shape shown in FIG. Is formed to extend in the height direction Z in a direction intersecting with the upper surface 42a. At this time, the projecting piece 5 separates the lower end 5b from the upper surface 42a of the receiving plate 42 and inclines in the material axial direction X from the base end 5c to the distal end 5d to project laterally in the material axial direction X It will be done.

  The joint structure 1 of the floor joist to which the present invention is applied, as shown in FIG. 10 and FIG. 11, the floor joist 2 is dropped by a crane or the like from the upper side in the height direction Z, The floor joists 2 or the floor joists 2 having a substantially C-shaped cross section shown in FIG.

  First, the joint structure 1 of the floor joist to which the present invention is applied is inserted from the lower flange 23 of the floor joist 2 into the insertion portion S as shown in FIGS. The floor joists 2 are dropped from the upper side of the side plate 41 to a position close to the upper end edge 5 a of 5. At this time, the protruding piece 5 is in a state of protruding toward the inner side E of the insertion portion S.

  Next, in the joint structure 1 of the floor joist to which the present invention is applied, the floor joist 2 is further dropped, as shown in FIG. 10 (b) and FIG. 11 (b), the lower flange 23 of the floor joist 2 The protruding piece 5 is pressed toward the outer side D of the insertion portion S at the end portion in the width direction Y. At this time, the protruding piece 5 is elastically deformed in the out-of-plane direction of the side plate 41, and hardly protrudes inward E of the insertion portion S.

  Finally, in the joint structure 1 of the floor joist to which the present invention is applied, the floor joist 2 is further dropped and, as shown in FIGS. 10 (c) and 11 (c), the lower flange 23 of the floor joist 2 is The falling of the floor joists 2 is completed by coming into contact with the upper surface 42 a of the receiving plate 42. At this time, from a state in which the protruding piece 5 does not protrude toward the inner side E of the insertion portion S, the protruding piece 5 is again restored by elastic deformation in the out-of-plane direction of the side plate 41, thereby protruding again to the inner side E of the insertion portion S Become.

  In the joint structure 1 of the floor joist to which the present invention is applied, particularly, the gap thickness dimension of the lower flange 23 of the floor joist 2 is a gap formed between the upper surface 42 a of the receiving plate 42 and the lower edge 5 b of the projecting piece 5 The size is smaller than the gap size γ of 50. At this time, in the floor joists 2, the lower flange 23 is disposed between the upper surface 42 a of the receiving plate 42 and the lower end edge 5 b of the projecting piece 5, and the receiving plate 42 and the projecting piece 5 widthwise Y of the lower flange 23 The end portion of the is sandwiched in the height direction Z.

  Furthermore, in the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIG. 12, the lower flange 23 of the floor joist 2 and the receiving plate 42 of the connection member 4 are screwed or bolted as needed. It may be joined by nail joint, welding joint or the like. At this time, the connection member 4 is a drill provided so as to penetrate in the height direction Z in a state where the lower flange 23 of the floor joist 2 is disposed between the lower end edge 5 b of the projecting piece 5 and the receiving plate 42. It is joined with the receiving plate 42 by a screw, a bolt 43 and the like.

  In the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIGS. 10 and 11, the floor joist 2 is inserted through the insertion portion S of the connection member 4, and the upper surface 42 a of the receiving plate 42 and the projecting piece 5 The lower flange 23 of the floor joist 2 is disposed between the lower end edge 5b. At this time, in the joint structure 1 of the floor joist to which the present invention is applied, the lower flange 23 of the floor joist 2 is sandwiched between the receiving plate 42 and the projecting piece 5, and the movement of the floor joist 2 in the height direction Z is restrained. It will be

  In the joint structure 1 of the floor joist to which the present invention is applied, the lower flange 23 of the floor joist 2 is sandwiched in the width direction Y by the pair of side plates 41 of the connection member 4 and movement of the floor joist 2 in the width direction Y is It will be a restraint. In the joint structure 1 of the floor joist to which the present invention is applied, the floor joist 2 is inserted into the insertion portion S of the connection member 4 at each end of the floor joist 2 in the material axial direction X, thereby the floor joist The movement in the material axial direction X of 2 is also constrained.

  At this time, in the joint structure 1 of the floor joist to which the present invention is applied, the movement of the floor joist 2 in the height direction Z, the width direction Y and the material axial direction X is restrained by the connection member 4 attached to the surrounding member 3 The floor joists 2 are supported. Thereby, the joint structure 1 of the floor joist to which the present invention is applied is the connection member even in the state of temporary support before bolting the receiving plate 42 of the connection member 4 and the lower flange 23 of the floor joist 2 It becomes possible to increase the restraint force of the floor joist 2 temporarily supported by 4.

  The joint structure 1 of the floor joist to which the present invention is applied does not necessarily require bolting or the like between the lower flange 23 of the floor joist 2 and the receiving plate 42 of the connecting member 4 and these are not bolted etc. The bonding between the floor joists 2 and the surrounding member 3 is completed in a state where the floor joists 2 are temporarily supported. At this time, the joint structure 1 of the floor joist to which the present invention is applied is in a state where the floor joist 2 is main-supported while the floor joist 2 is not bolted or the like.

  In addition, the joint structure 1 of the floor joist to which the present invention is applied drops the floor joist 2 and temporarily supports the joint member 4 and then releases a crane or the like from the temporarily supported floor joist 2 to form another joint Can carry out lifting work of floor joists 2 with a crane etc. Thus, the joint structure 1 of the floor joist to which the present invention is applied lifts the floor joist 2 by releasing the crane immediately from the floor joist 2 after temporarily supporting the floor joist 2 on the connection member 4. Can be implemented sequentially to improve the efficiency of lifting work of floor joists 2.

  In addition, the joint structure 1 of the floor joist to which the present invention is applied is easy to manufacture without requiring the welding operation of the gusset plate and the guide plate as in the prior art or the processing of the lower flange 23 of the floor joist 2 or the like. The high-quality connection member 4 can support the floor joists 2. As a result, the joint structure 1 of the floor joist to which the present invention is applied does not require complicated work such as processing of the floor joist 2 and the connection member 4 having high easiness of manufacture is used. Material cost and construction cost can be reduced.

  Here, in the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIG. 13, the projecting piece 5 formed on the side plate 41 of the connection member 4 is particularly the material axial direction X of the floor joist 2 Project sideways. And in the joint structure 1 of the floor joist to which the present invention is applied, the lower flange 23 of the floor joist 2 is sandwiched between the receiving plate 42 and the projecting piece 5, and the movement of the floor joist 2 in the height direction Z is restrained. It becomes a thing.

  At this time, the joint structure 1 of the floor joist to which the present invention is applied is a floor joist 2 in which the lower flange 23 of the floor joist 2 floats in the height direction Z and is sandwiched between the receiving plate 42 and the projecting piece 5. The lifting force P acts on the lower end edge 5 b of the protruding piece 5 from the lower flange 23. The joint structure 1 of the floor joist to which the present invention is applied is, in particular, the projecting piece 5 against the lift force P acting on the lower end edge 5 b of the projecting piece 5 because the projecting piece 5 of the connecting member 4 protrudes laterally. Will exert in-plane shear resistance.

  On the other hand, in the conventional I-shaped beam attachment hardware 9, as shown in FIG. 14, the locking claw 90 vertically protrudes from the vertical wall 91, and the out-of-plane direction at the root portion 90 a of the locking claw 90 The lower flange 23 of the floor joist 2 is restrained by the bending rigidity of Therefore, as shown in FIG. 14 (a), the conventional I-shaped beam attachment hardware 9 is shown in FIG. 14 (b) when the lifting force P acts from the lower flange 23 of the floor joist 2 to the locking claw 90. As a result, the locking claw 90 is deformed so as to be turned upward and the restraint of the floor joists 2 becomes insufficient.

  In the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIG. 13, the projection piece 5 is in-plane with respect to the floating of the floor joist 2 because the projection piece 5 of the connection member 4 protrudes laterally. By exerting shear resistance, the floor joists 2 are sufficiently restrained in the height direction Z. Thereby, the joint structure 1 of the floor joist to which the present invention is applied is the floor jot even in the state of temporary support before bolting the receiving plate 42 of the connection member 4 and the lower flange 23 of the floor joist 2. 2 is sufficiently restrained by the laterally extending projecting piece 5, and it becomes possible to secure a high restraining force against lifting of the floor joists 2.

  As shown in FIG. 5, in the joint structure 1 of the floor joist to which the present invention is applied, the notch height α of the projecting piece 5 in the height direction Z is 0..0 of the notch width β of the material axial direction X of the projecting piece 5. It is desirable that the size be 75 times or more. Here, the elastic limit factor (= lifting force P / resistance value of projecting piece 5) when projecting piece 5 exerts in-plane shearing resistance is: levitation force P, plate thickness t of projecting piece 5, and notch height The relationship with α, notch width β, and yield stress σy is calculated from the following equation (1).

  In FIG. 16, the elastic limit rate of the projecting piece 5 is taken as the vertical axis, and the ratio (α / β) of the notch height α to the notch width β is taken as the horizontal axis, and the elastic limit rate calculated by the above equation (1) And the ratio (α / β). Here, while the projecting piece 5 is plastically deformed when the elastic limit factor exceeds 1, it is shown that the projecting piece 5 is elastically deformed when the elastic limit factor is 1 or less.

  The joint structure 1 of the floor joist to which the present invention is applied has an elastic limit factor of 1 by setting the ratio (α / β) of the notch height α to the notch width β to 0.75 or more as shown in FIG. Since the elastic deformation of the projecting piece 5 is maintained as below, the in-plane shear resistance can be sufficiently secured. Further, in the joint structure 1 of the floor joist to which the present invention is applied, the elastic limit ratio becomes about 0.5 or less by setting the ratio (α / β) of the notch height α to the notch width β to 1.0 or more. The elastic deformation of the projecting piece 5 is ensured.

  Thereby, particularly in the joint structure 1 of the floor joist to which the present invention is applied, the notch height α of the projecting piece 5 in the height direction Z is 0.75 times the notch width β of the projecting piece 5 in the material axial direction X It becomes possible to fully ensure the in-plane shear resistance force by the protrusion piece 5 because it becomes the above magnitude | size. Furthermore, in the joint structure 1 of the floor joist to which the present invention is applied, the in-plane shear resistance due to the projecting piece 5 is ensured by the notch height α of the projecting piece 5 being larger than the notch width β of the projecting piece 5 Power can be realized.

  In the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIG. 6 (a), not only the projecting pieces 5 project laterally but are inclined in a substantially straight line, as shown in FIG. As shown in c), the protruding piece 5 may be formed by bending or bending. Thereby, the joint structure 1 of the floor joist to which the present invention is applied can increase the in-plane resistance of the curved or bent projecting piece 5 and improve the in-plane shear resistance force by the projecting piece 5 Become.

  As shown in FIG. 9, the joint structure 1 of the floor joist to which the present invention is applied is formed in a substantially rectangular shape shown in FIG. 7 or in a substantially triangular shape shown in FIG. Alternatively, the upper end edge 5 a of the protruding piece 5 may be formed so as not to protrude into the insertion portion S. Thus, when the floor joist 2 is dropped into the insertion portion S as shown in FIG. 15, the joint structure 1 of the floor joist to which the present invention is applied is the lower flange 23 of the floor joist 2 and the upper edge 5a of the projecting piece 5 And the floor joists 2 can be smoothly inserted into the insertion portion S. Here, if the lower flange 23 of the floor joist 2 and the upper edge 5a of the projecting piece 5 do not interfere with each other, even if the upper edge 5a of the projecting piece 5 slightly protrudes to the insertion portion S, It can be regarded that the upper end edge 5 a is formed so as not to protrude to the insertion portion S.

  In the joint structure 1 of the floor joist to which the present invention is applied, even when the upper end 5 a of the projecting piece 5 projects to the insertion portion S, the floor joist 2 is inclined by the method of inclining the floor joist 2 in the material axial direction X. Interference between the lower flange 23 and the upper end edge 5 a of the projecting piece 5 can be reduced.

  In the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIG. 12, the lower flange 23 of the floor joist 2 and the receiving plate 42 of the connection member 4 are screwed, bolted and nailed as needed. It may be joined by joining or welding. Thereby, the joint structure 1 of the floor joist to which the present invention is applied is further firmly fixed by bolt joining or the like from the state where the floor joist 2 is temporarily supported by the connection member 4, the restraint force of the floor joist 2 To make it possible to prevent floor noise reliably.

  The joint structure 1 of the floor joist to which the present invention is applied is, for example, a floor joist 2 in which the span length in the material axial direction X is about 3 m to 4 m, and a floor joist 2 of about 5 m to over 8 m Is also applicable. At this time, as shown in FIG. 2, particularly, as shown in FIG. 2, the floor joists 2 of the lightweight H-section steel or thin-plate lightweight steel, which is lighter than the conventional H-section steel, are used This makes it possible to easily carry out lifting work of floor joists 2.

  As mentioned above, although the example of the embodiment of the present invention was explained in detail, any of the above-mentioned embodiments only shows the example of the embodiment in the case of carrying out the present invention. The scope should not be interpreted as limiting.

1: Joint structure of floor joists 2: Floor joists 21: Flange 21 a: middle part 21 b: one end 22: upper flange 23: upper flange 24: lower flange 24: web 3: surrounding member 30: side 31: end joist 32: pillar 4: connection Member 40: back plate 41: side plate 41a: lower end 42: receiving plate 42a: upper surface 43: bolt 5: projecting piece 5a: upper end edge 5b: lower end edge 5c: base end 5d: tip 50: gap 8: building 80: Floor material S: Insertion part X: Material axial direction Y: Width direction Z: Height direction

Claims (7)

It is a connecting member of floor joists provided in a building,
A connecting member for joining a floor joist on which a flange and a web are formed to a surrounding member,
The connecting member has a pair of side plates protruding from the surrounding member and separated from each other, and a receiving plate extending in the width direction of the floor joist, and surrounded by the pair of side plates and the receiving plate And an insertion portion through which the
In the side plate, a projecting piece that protrudes in the lateral direction in the material axis direction of the floor joist at the insertion portion is formed in one or both of the pair of side plates,
The lower end edge is formed in the position which made the said protrusion piece estranged in the height direction from the said receiving plate, and it becomes what elastically deforms in the out-of-plane direction of the said side plate. The connection member of the floor joist. The connecting member for floor joists according to claim 1, wherein the projecting piece is formed by curving or bending in the lateral direction in the material axis direction of the floor joists. The projecting piece is formed with an upper end edge so as not to protrude toward the inside of the insertion portion, and is protruded toward the inside of the insertion portion to form the lower end edge. Or the connection member of the floor joist of 2 statement. The connection member for the floor joist according to any one of claims 1 to 3, wherein the projecting piece is formed so as to be opened laterally toward the surrounding member side in the material axial direction of the floor joist. . The said projection piece becomes the magnitude | size of 0.75 times or more of the notch height of the height direction in the said side plate to the notch width of a material-axis direction. It is characterized by the above-mentioned. Floor joist connection member. Bonding structure of floor joists provided in buildings,
A floor joist on which a flange and a web are formed, and a connection member for joining the floor joist to a surrounding member;
The connecting member has a pair of side plates protruding from the surrounding member and separated from each other, and a receiving plate extending in the width direction of the floor joist, and surrounded by the pair of side plates and the receiving plate And an insertion portion through which the
In the side plate, a projecting piece that protrudes in the lateral direction in the material axis direction of the floor joist at the insertion portion is formed in one or both of the pair of side plates,
The lower end edge is formed at a position spaced apart from the receiving plate in the height direction, and the projecting piece elastically deforms in the out-of-plane direction of the side plate,
In the floor joist, the web extending in the height direction is formed at an intermediate portion or one end in the width direction of the flanges which are paired in the height direction, and a lower flange serving as the flange under the floor joist The joint structure of the floor joists characterized in that it is to be joined with the receiving plate in a state of being disposed between the lower end edge of the projecting piece and the receiving plate. The floor joist is a lightweight H-shaped steel in which the web extending in the height direction is formed at an intermediate portion in the width direction of the flange which is paired in the height direction, or from one end of the flange in the width direction The joint structure of floor joists according to claim 6, wherein a thin lightweight steel sheet on which the web is formed is used.

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