JP6540491B2 - 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. Moreover, as a thing which can join steel large beams and small beams easily, the joining method etc. which are disclosed by patent document 2, 3 are proposed, for example.

  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 joining method of the beam and the girder disclosed in Patent Document 2 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

  The joint structure of steel large beams and small beams disclosed in Patent Document 3 is a structure in which the ends of the steel small beams are joined to the middle portion in the longitudinal direction of the steel large beam, and the large and small beams are Each plate portion of the gusset hardware having a flange and a web, and a plate portion along the web of the large beam and a plate portion along the web of the small beam is bolted to the web of each beam, And the girder are joined with gusset hardware.

Utility model registration 3126276 gazette Unexamined-Japanese-Patent No. 2004-278210 JP, 2006-200273, A

  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 method of joining the beamlet and the large beam disclosed in Patent Document 2, 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 2 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 2 has no restraint element for preventing the girder from rising 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.

  Further, in the joint structure of the small beam and the large beam disclosed in Patent Document 3, the small beam is supported by the gusset metal by attaching the plate portion of the gusset metal to the web of large and small beams. However, in the joint structure of the small beam and the large beam disclosed in Patent Document 3, in order to attach the plate portion to the web of the small beam, the lower flange of the small beam may be formed with a slit to pass through the plate portion. Since it becomes necessary, while the processing effort of a small beam increases, the construction effort for penetrating a plate part to a slit increases, There existed a problem that material cost and construction cost increased. Further, in the joint structure of the small beam and the large beam disclosed in Patent Document 3, when temporarily supporting the lower flange of the small beam by the plate portion of the gusset hardware, there is no restraint element for preventing the floating of the small beam. 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 secure a high restraining force while reducing the degree of processing of floor joists, and to lift floor joists It is an object of the present invention to provide a connection member and joint structure of floor joists with improved efficiency of heavy work.

  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 back plate attached to the surrounding member, and a longitudinal plate protruding from the surrounding member and extending in the height direction of the floor joists, the back plate protruding in the out-of-plane direction of the back plate A projecting piece is formed, and the projecting piece is characterized in that a gap is formed between the projecting piece and the side surface of the vertical plate, and the projecting piece elastically deforms in the out-of-plane direction of the back 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 vertical direction in the height 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 such that a separated side edge separated from the vertical plate does not protrude from the back plate, The near side edge adjacent to the vertical plate is formed to project from the back plate in the out-of-plane direction.

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

  In the floor joist connecting member according to the fifth invention, in any of the first invention to the fourth invention, the connecting member has a receiving plate extending in the width direction of the floor joist, and the lower end portion of the vertical plate A gap is formed between the and the receiving plate.

  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 has a back plate attached to the surrounding member, and a longitudinal plate projecting from the surrounding member and extending in the height direction of the floor joists, the back plate being the back plate A protruding piece protruding in the out-of-plane direction is formed, and a space is formed between the protruding piece and the side surface of the vertical plate, and the protruding piece elastically deforms in the out-of-plane direction of the back plate. In the joist, the web extending in the height direction is formed at an intermediate portion or one end portion in the width direction of the flanges which are paired in the height direction, and the web between the side surface of the vertical plate and the projecting piece is formed In the state where the web of the floor joists is placed in the gap, Wherein the web is joined to the vertical plates.

  In the joint structure of a floor joist according to a seventh invention, in the sixth invention, the floor joist is a drill screw inserted into a through hole penetrating the vertical plate, and the web is joined to the vertical plate It is characterized by

  In the joint structure of a floor joist according to an eighth invention, in the sixth invention or the seventh invention, the connecting member has a receiving plate extending in the width direction of the floor joist, and the lower end portion of the vertical plate and the receiving A gap is formed between the plate, and the lower flange serving as the lower flange of the floor joist is inserted into the gap between the lower end of the vertical plate and the receiving plate. A plate is joined to the lower flange.

  In the joint structure of a floor joist according to a ninth aspect of the present invention, in the eighth aspect, the floor joist is a drill screw inserted into a through hole penetrating the backing plate, and the lower flange is joined to the backing plate It is characterized by

  In the joint structure of a floor joist according to a tenth invention, in any one of the sixth invention to the ninth invention, the protruding piece is disposed in the gap between the side face of the vertical plate and the web of the floor joist It is characterized in that it is disposed at a position above the center-of-gravity position of the floor joist.

  The joint structure of a floor joist according to an eleventh aspect of the present invention is the floor joist according to any of the sixth through tenth aspects of the present invention, wherein the floor joist is 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 in which the web extending is formed, 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 invention to the eleventh invention, the movement of the floor joists in the height direction, the width direction, and the material axial direction is restrained, and the floor joists are supported by the connection member, so that the web of floor joists or Even in the state of temporary support before the connection member is screwed to the lower flange, it is possible to increase the restraint force of the floor joist temporarily supported by the connection member.

  According to the first invention to the eleventh invention, after the floor joist is dropped and temporarily supported, the crane is released immediately from the temporarily supported jolt joist to lift 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 eleventh inventions, since the welding operation of the gusset plate and the guide plate as in the prior art and the slitting of the lower flange of the floor joist are not required, the processing degree of the floor joist is reduced, It is possible to reduce the material cost and the construction cost by reducing the number of parts, the processing time and the construction time.

  In particular, according to the second aspect of the present invention, even in the temporary support state before the floor joists are screwed to the connection member, the projecting pieces project longitudinally to exert in-plane shear resistance force, so that the floor joists are It becomes possible to secure a high constraining force against movement in the width direction, and it is possible to increase the in-plane rigidity of the curved or bent projecting piece and to improve the in-plane shear resistance by the projecting piece.

  In particular, according to the third aspect of the present invention, since the separated side edge of the projecting piece does not protrude from the back plate, the web of the floor joist and the separated side edge of the projecting piece hardly interfere with each other, thereby dropping the floor joist. It is possible to slide the floor joists smoothly in the width direction without requiring the

  In particular, according to the fourth aspect of the present invention, the in-plane shear resistance force by the projecting piece is obtained by setting the notch width in the width direction of the projecting piece to be at least 0.75 times the notch height in the height direction of the projecting piece. Can be secured sufficiently.

  In particular, according to the fifth and eighth inventions, when 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 screwed, nailed, bolted or welded By being further firmly fixed by joining etc., it becomes possible to prevent floor noise reliably.

  In particular, according to the sixth aspect of the invention, from the state where the floor joists are temporarily supported by the connection member, the web of floor joists and the longitudinal plate of the connection members are further strengthened by screw joint, nail joint, bolt joint or weld joint By being fixed to, it becomes possible to transmit shear force via a vertical plate and to improve structural performance.

  In particular, according to the seventh invention and the ninth invention, from the state in which the floor joist is temporarily supported by the connecting member, the floor joist is fixed more firmly by the drill screw to improve the restraint force of the floor joist It becomes possible to reliably prevent floor noise, and by using the through holes of the vertical plate or the receiving plate as the front holes, the floor joists are joined to the connecting member without performing special processing on the floor joists It becomes possible.

  In particular, according to the tenth aspect of the present invention, the projecting piece is disposed at a position above the center of gravity of the floor joist, and the web of the floor joist is wider than the center of gravity at the gap between the side face of the vertical plate and the projecting piece. By being in a state of being sandwiched in the direction, it is possible to effectively suppress the fall of the floor joists.

  In particular, according to the eleventh 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 connection member which a backplate extends on the both sides of a vertical plate by the bonded structure of the floor joist which applied this invention. (A) is a front view which shows the connection member which a backplate extends in the both sides of a vertical plate by the bonded structure of the floor joist which applied this invention, (b) is the top view. It is a perspective view which shows the connection member which a backplate extends to one side of a vertical plate by the bonded structure of the floor joist which applied this invention. (A) is a front view which shows the connection member which a backplate extends to one side of a longitudinal plate by the bonded structure of the floor joist which applied this invention, (b) is the top view. (A) is a side view which shows the connection member in which the receiving plate was formed by the joining structure of the floor joist which applied this invention, (b) is a side view which shows the connecting member in which the receiving plate is not formed . (A) is a side view which shows the protrusion piece which inclined in the substantially linear shape and protruded longitudinally by the bonded structure of the floor joist which applied this invention, (b) is the side which shows the curved protrusion piece. It is a figure and (c) is a side view showing the bent projection 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 to which this invention is applied, (b) is the top view. (A) is a front view which shows the connection member in which the substantially triangular shaped projecting piece was formed by the bonded structure of the floor joist to which this invention is applied, (b) is the top view. It is a perspective view which shows the separation side edge of the protrusion piece formed so that it might not protrude from a backplate by the bonded structure of the floor joist to which this invention is applied. (A) is a front view which shows the state from which a floor joist is dropped by the bonded structure of the floor joist to which this invention is applied, (b) is the side view. (A) is a front view which shows the state by which the floor joist was mounted on the receiving board by the bonded structure of the floor joist to which this invention is applied, (b) is the side view. (A) is a front view which shows the state to which the floor joist was slid by the bonded structure of the floor joist to which this invention is applied, (b) is the side view. (A) is a front view showing a state in which a floor joist having a substantially H-shaped cross section is temporarily supported by the joint structure of floor joists to which the present invention is applied; (b) a floor jot having a substantially C-shaped cross section is tentative It is a front view showing a supported state. (A) is a front view showing a state in which a floor joist having a substantially H-shaped cross section is temporarily supported by a connecting member in which a receiving plate is not formed; (b) is a cross-sectional substantially C-shaped in a connecting member without a receiving plate It is a front view which shows the state by which the floor joist of 1 was temporarily supported. (A) is a front view showing a state in which a floor joist having a substantially H-shaped cross section is fixed by a drill screw, and (b) is a front view showing a state in which a floor joist having a substantially C-shaped cross section is fixed by a drill screw FIG. It is a graph which shows the relationship between the elastic limit rate and the ratio of the notch width with respect to notch height 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 and 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 on which the flange 21 and the web 24 are formed, 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 protrudes in the height direction Z from the back plate 40 which is in contact with the side face 30 of the circumferential member 3 substantially orthogonal to the floor joist 2 and the side face 30 of the circumferential member 3 It has an extending longitudinal plate 41 and, if necessary, a receiving plate 42 which protrudes from the side surface 30 of the surrounding member 3 and extends in the width direction Y.

  The connection member 4 is formed by bending a substantially flat steel plate or the like so that the back plate 40 and the receiving plate 42 are substantially orthogonal to each other and each is formed into a substantially flat shape, and the back plate 40 is surrounded It is attached to the side surface 30 of the member 3 by screw joint or bolt joint or the like. The connecting member 4 is attached, for example, by welding or the like so that the vertical plate 41 formed in a substantially flat plate shape is substantially orthogonal to the back plate 40.

  As shown in FIG. 4A, the back plate 40 extends in the width direction Y and the height direction Z and is formed into a substantially flat plate, so that the width direction Y and the height direction Z become an in-plane direction. Moreover, as shown to FIG. 4B, the material axial direction X which the vertical plate 41 protrudes turns into an out-of-plane direction. The back plate 40 is separated in the width direction Y by the vertical plate 41, and one side of the vertical plate 41 in the width direction Y is the bonding side 40a.

  The back plate 40 is formed with a protruding piece 5 that protrudes in the out-of-plane direction of the back plate 40 on the joint side 40 a that is one side of the vertical plate 41 in the width direction Y. At this time, the back plate 40 performs notch processing or the like extending in the width direction Y on a steel plate or the like formed in a substantially flat plate shape, whereby the end on the separation side 5 a A projecting piece 5 having a predetermined notch width α is formed continuously to the edge 5 b.

  As shown in FIG. 4A, the rear end plate 40 of the protruding piece 5 is connected to the rear end plate 40 by carrying out a cutting process or the like extending in the width direction Y, as shown in FIG. The front end 5 d of 5 is separated from the back plate 40 in the material axial direction X. In the back plate 40, a projecting piece 5 having a predetermined notch height β is formed continuously from the proximal end 5c to the distal end 5d in the height direction Z.

  The back plate 40 may be extended to both sides of the vertical plate 41 in the width direction Y, or may be extended to only one side of the vertical plate 41 in the width direction Y as shown in FIG. At this time, as shown in FIG. 6 (a), the back plate 40 has a back side by bending or the like as shown in FIG. 6 (b) on the joining side 40a that is one side of the vertical plate 41 in the width direction Y A vertical plate 41 is formed continuously from the face plate 40.

  As shown in FIG. 7, the vertical plate 41 is formed to extend from the upper end 41 a to the lower end 41 b in the height direction Z with a predetermined extension length h. In the vertical plate 41, the side surface 41c of the vertical plate 41 is formed substantially flat, and, if necessary, one or more through holes 41d penetrating the side surface 41c of the vertical plate 41 in the thickness direction are substantially circular. Or, it is formed to have a substantially rectangular shape or the like.

  As shown in FIG. 7A, the receiving plate 42 is formed so as to protrude in the material axial direction X continuously from the lower end 40b of the back plate 40. At this time, the receiving plate 42 projects in the material axial direction X, and the lower end 41 b of the vertical plate 41 and the receiving plate 42 are separated in the height direction Z, whereby the lower end 41 b of the vertical plate 41 and the receiving plate A gap G2 is formed between the upper surface 42a and the upper surface 42a.

  In the receiving plate 42, the upper surface 42a of the receiving plate 42 is formed substantially flat, and one or a plurality of through holes 41d penetrating in the thickness direction from the upper surface 42a of the receiving plate 42 are substantially circular, as necessary. Or, it is formed to have a substantially rectangular shape or the like.

  The receiving plate 42 is continuously formed from the lower end 40b of the back plate 40 and formed by bending or the like, but the position is not limited to this, and is a position separated from the lower end 40b of the back plate 40 in the height direction Z May be attached by welding or the like. In addition, as the connection member 4 is shown in FIG.7 (b), only the backplate 40 and the vertical plate 41 may be formed, without the receiving plate 42 being formed.

  As shown in FIG. 8A, the projecting piece 5 projects vertically from the proximal end 5c to the distal end 5d in the height direction Z and inclines in a substantially straight line in the height direction Z. Become. Further, the projecting piece 5 may project in the vertical direction in the height direction Z and may be formed to be curved in a substantially arc shape or the like as shown in FIG. 8 (b), shown in FIG. 8 (c) Thus, it may be bent in a substantially U-shape or the like.

  As shown in FIG. 9, the projecting piece 5 has a separation side end 5 a formed at a position separated from the vertical plate 41 and a close side end 5 b formed at a position adjacent to the vertical plate 41. In the projecting piece 5, a gap G1 having a predetermined gap dimension γ in the width direction Y is formed between the side surface 41c of the vertical plate 41 and the near side edge 5b, and in the out-of-plane direction of the back plate 40. It will be elastically deformed.

  The projecting piece 5 extends in the width direction Y so that the proximal end 5c and the distal end 5d are substantially parallel to each other, and is high such that the separated side edge 5a and the close side edge 5b are substantially parallel to each other. By extending in the longitudinal direction Z, a substantially rectangular shape is formed.

  Further, as shown in FIG. 10, the projecting piece 5 may be formed in a substantially triangular shape, with the separated side edge 5a as a vertex and the near side edge 5b as a base. At this time, one or both of the proximal end 5c and the distal end 5d of the protruding piece 5 are formed to be inclined in the width direction Y, and for example, the proximal end 5c and the near side edge 5b It is formed in a substantially right triangle shape or the like orthogonal to each other.

  When the projecting piece 5 is formed in a substantially rectangular shape as shown in FIG. 9, as shown in FIG. 11A, the projecting piece 5 and the back side plate 40 can be partially bent by bending only the separation side edge 5a. The spaced-apart side edge 5a may be disposed in substantially the same plane. Further, when the projecting piece 5 is formed in a substantially triangular shape shown in FIG. 10, as shown in FIG. 11 (b), the separated side edge 5a is formed in a substantially acute angle shape as a vertex of a substantially triangular shape. The spaced-apart end 5a may be disposed substantially in the same plane as the back plate 40.

  At this time, as shown in FIG. 11, the protruding piece 5 is disposed on the separation side so as not to protrude from the back surface plate 40 in the out-of-plane direction by arranging the separation side edge 5a in substantially the same plane of the back surface plate 40. The end 5 a is formed, and the near side end 5 b is formed so as to protrude out of the back plate 40 in the out-of-plane direction.

  The projecting end 5 c and the tip end 5 d of the projecting piece 5 are vertical plates 41 in any of the case where they are formed in a substantially rectangular shape shown in FIG. 9 or in the case where they are formed in a substantially triangular shape shown in FIG. It is formed extending in the width direction Y in the direction intersecting with the side surface 41 c of the. At this time, the projecting piece 5 separates the near side edge 5b from the side surface 41c of the vertical plate 41, and inclines downward in the height direction Z from the base end 5c to the tip 5d, so that the height direction Z It will project in the vertical direction.

  Here, in the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIGS. 12 to 14, the floor joist 2 is dropped by a crane or the like from the upper side in the height direction Z and The floor joists 2 are supported by the connecting member 4 from the joint side 40 a of the back plate 40 which is one side of the plate 41.

  First, the joint structure 1 of the floor joist to which the present invention is applied is, as shown in FIG. 12A, from the upper side of the joint side 40a of the back plate 40 to a position close to the projecting piece 5; Lower flange 23 is dropped. At this time, as shown in FIG. 12 (b), the protruding piece 5 is in a state of protruding in the out-of-plane direction from the back plate 40.

  Next, the joint structure 1 of the floor joist to which the present invention is applied is a web 24 of the floor joist 2 until the lower flange 23 of the floor joist 2 is placed on the receiving plate 42 as shown in FIG. The floor joists 2 are further dropped at a position where the and the protruding pieces 5 overlap in the width direction Y. At this time, as shown in FIG. 13 (b), the lower flange 23 and the web 24 abut against the end of the floor joist 2 in the material axial direction X, and the projecting piece 5 is pressed toward the surrounding member 3 As a result, the sheet is elastically deformed in the out-of-plane direction of the back plate 40 and hardly protrudes from the back plate 40.

  Lastly, as shown in FIG. 14 (a), the joint structure 1 of the floor joist to which the present invention is applied slides the floor joist 2 in the width direction Y, whereby the side face 41c of the vertical plate 41 and the projecting piece 5 The web 24 of the floor joists 2 is disposed in the gap G1 between them. At this time, the protruding piece 5 is not pressed by the web 24 of the floor joists 2 from the state where it does not protrude from the back plate 40 shown in FIG. 13B, and as shown in FIG. By being returned by the elastic deformation in the out-of-plane direction, it is in a state of protruding again from the back plate 40.

  Here, as shown in FIG. 15, in the joint structure 1 of the floor joist to which the present invention is applied, the thickness of the web 24 of the floor joist 2 is particularly close to the side 41 c of the vertical plate 41 and the protruding piece 5 The size is equal to or less than the gap size γ of the gap G1 with the end edge 5b. At this time, in the floor joists 2, the web 24 is disposed in the gap G1 between the side surface 41c of the vertical plate 41 and the projecting piece 5, and the web 24 is sandwiched in the width direction Y by the longitudinal plate 41 and the projecting piece 5. It becomes.

  Further, in the joint structure 1 of the floor joist to which the present invention is applied, the thickness dimension of the lower flange 23 of the floor joist 2 is equal to or less than the gap dimension of the gap G2 between the lower end 41 b of the vertical plate 41 and the upper surface 42 a of the receiving plate 42. The size of the At this time, in the floor joists 2, the lower flange 23 is inserted into the gap G2 between the lower end 41b of the vertical plate 41 and the receiving plate 42, and the lower flange 23 in the height direction Z by the vertical plate 41 and the receiving plate 42. It will be in the state of being pinched.

  In the joint structure 1 of the floor joist to which the present invention is applied, since the web 24 of the floor joist 2 is sandwiched between the vertical plate 41 and the projecting piece 5, the movement of the floor joist 2 in the width direction Y is restrained. . Further, 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 vertical plate 41 and the receiving plate 42, so the movement of the floor joist 2 in the height direction Z Are bound. In the joint structure 1 of the floor joist to which the present invention is applied, the floor joist 2 is supported by the connecting member 4 at each end of the floor joist 2 in the material axial direction X, thereby the timber axis of the floor joist 2 Movement in the direction X is also constrained.

  In the joint structure 1 of floor joists to which the present invention is applied, when the receiving plate 42 is formed on the connection member 4, the height dimension of the web 24 of the floor joists 2 is larger than the extension length of the vertical plate 41. It will be At this time, in the joint structure 1 of the floor joist to which the present invention is applied, regardless of whether or not the upper end portion 41 a of the vertical plate 41 abuts on the upper flange 22 of the floor joist 2, And the lower flange 23 is sandwiched, and movement of the floor joists 2 in the height direction Z is restrained.

  On the other hand, in the joint structure 1 of the floor joist to which the present invention is applied, as shown in FIG. 16, particularly in the case where the receiving plate 42 is not formed, the stretching length of the vertical plate 41 is the web 24 of the floor joist 2 And the height dimension of. At this time, in the joint structure 1 of the floor joist to which the present invention is applied, the height direction of the floor joist 2 is obtained by the upper end 41 a and the lower end 41 b of the vertical plate 41 being sandwiched between the upper flange 22 and the lower flange 23. The movement of Z will be constrained.

  Thus, 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 connecting member 4 attached to the surrounding member 3 As a result, the floor joists 2 are supported. And, the joint structure 1 of the floor joist to which the present invention is applied is the joint member 4 even in the state of temporary support before the joint member 4 is screwed to the web 24 or the lower flange 23 of the floor joist 2. It is possible to increase the restraint force of the floor support 2 temporarily supported by the

  The joint structure 1 of the floor joist to which the present invention is applied does not necessarily require screw joint or the like between the web 24 or the lower flange 23 of the floor joist 2 and the lower flange 23 and the connection member 4. With the floor joists 2 temporarily supported, the joining of the floor joists 2 and the surrounding member 3 is completed. 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 screwed or the like.

  In addition, the floor joists 2 may be connected at the connection points 26 where the webs 24 are connected to the flanges 21, and welds by welding assembly, fillets by roll forming, or curved portions by bending may be formed. At this time, when the upper end portion 41a of the vertical plate 41 is in contact with the upper flange 22 and the lower end portion 41b of the vertical plate 41 is in contact with the lower flange 23, the upper end portion 41a of the vertical plate 41 and By bending or chamfering the lower end portion 41b, interference between the welded portion of the floor joists 2 and the like and the upper end portion 41a and the lower end portion 41b of the vertical plate 41 can be avoided.

  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.

  Furthermore, 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, the slitting of the lower flange 23 of the floor joist 2 and the like. The floor connection 2 can support the floor joists 2. As a result, the joint structure 1 of the floor joist to which the present invention is applied makes it possible to reduce the machining degree of the floor joist 2 by eliminating the complicated work such as slit machining of the floor joist 2 and also reducing the number of parts and machining labor. And it becomes possible to reduce construction time and material cost and construction cost.

  In the joint structure 1 of the floor joist to which the present invention is applied, the web 24 of the floor joist 2 is sandwiched between the vertical plate 41 and the projecting piece 5, and the movement of the floor joist 2 in the width direction Y is restrained. And, as shown in FIG. 15, in the joint structure 1 of the floor joist to which the present invention is applied, the projecting pieces 5 formed on the back plate 40 project longitudinally in the height direction Z of the floor joist 2. In particular, the projecting piece 5 exerts in-plane shear resistance against the movement of the floor joists 2 in the width direction Y.

  Thereby, the joint structure 1 of the floor joist to which the present invention is applied is sufficiently restrained by the projection piece 5 of the floor joist 2 in the vertical direction even in the state of temporary support before the connection member 4 is screw jointed or the like. As a result, it becomes possible to secure a high binding force for the movement of the floor joists 2 in the width direction Y.

  As shown in FIGS. 4 and 6, the joint structure 1 of the floor joist to which the present invention is applied, the notch width α of the projecting piece 5 in the width direction Y is 0 of the notch height β of the projecting piece 5 in the height direction Z. It is desirable that the size be .75 times or more. Here, the elastic limit factor (= shearing force P / resistance value of projecting piece 5) when projecting piece 5 exerts in-plane shearing resistance is shear force P, plate thickness t of projecting piece 5, notch width α The relationship between the notch height β and the yield stress σy is calculated from the following equation (1).

  In FIG. 18, the elastic limit rate of the protruding piece 5 is taken as the vertical axis, and the ratio (α / β) of the notch width α to the notch height 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 width α to the notch height 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 width α to the notch height β to 1.0 or more. The elastic deformation of the projecting piece 5 is ensured.

  Thereby, in the joint structure 1 of the floor joist to which the present invention is applied, particularly, the notch width α in the width direction Y of the projecting piece 5 is 0.75 or more times the notch height β in the height direction Z of the projecting piece 5 By setting the size of (1), it is possible to sufficiently ensure the in-plane shear resistance by the protruding piece 5. 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 width α of the projecting piece 5 being equal to or larger than the notch height 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. 8 (a), not only the projecting piece 5 protrudes vertically and inclines in a substantially straight line, but also FIG. 8 (b), FIG. As shown to (c), it may curve or bend and the protrusion piece 5 may be formed. Thereby, the joint structure 1 of the floor joist to which the present invention is applied can increase the in-plane rigidity of the curved or bent projecting piece 5 and improve the in-plane shear resistance by the projecting piece 5 Become.

  Further, in the joint structure 1 of the floor joist to which the present invention is applied, the case in which the projecting piece 5 shown in FIG. 9 is formed in a substantially rectangular shape, or the case in which the projecting piece 5 shown in FIG. In any of the above, as shown in FIG. 11, the separated side edge 5 a of the protruding piece 5 may be formed so as not to protrude from the back plate 40. Thereby, in the joint structure 1 of the floor joist to which the present invention is applied, the web 24 of the floor joist 2 and the separated side edge 5 a of the projecting piece 5 hardly interfere with each other, and the process of dropping the floor joist 2 shown in FIG. It is possible to slide the floor joists 2 smoothly in the width direction Y, as shown in FIG. Here, if the web 24 of the floor joists 2 and the separated side edge 5a of the projecting piece 5 do not interfere with each other, even if the separated side edge 5a protrudes somewhat from the back plate 40 of the projecting piece 5, It can be regarded that the separated side edge 5 a of the piece 5 is formed so as not to protrude from the back plate 40.

  Further, in the joint structure 1 of the floor joist to which the present invention is applied, the height direction of the web 24 in the state where the web 24 of the floor joist 2 is disposed in the gap G1 between the side surface 41 c of the vertical plate 41 and the projecting piece 5 It is desirable that the protruding piece 5 be disposed in the range of about 1/2 on the upper side by Z. Thereby, in the joint structure 1 of the floor joist to which the present invention is applied, the projecting piece 5 is disposed at a position above the center of gravity of the floor joist 2 and the web 24 of the floor joist 2 is in the width direction above the center of gravity By being in a state of being sandwiched by Y, it becomes possible to suppress the fall of the floor joists 2.

  Further, in the joint structure 1 of the floor joist to which the present invention is applied, the web 24 of the floor joist 2 and the side surface 41 c of the vertical plate 41 are disposed in contact with each other. By suppressing the eccentricity of Y, it is possible to realize stable bonding between the floor joists 2 and the surrounding members 3.

  Furthermore, in the joint structure 1 of the floor joist to which the present invention is applied, the web 24 of the floor joist 2 and the longitudinal plate 41 are screwed, nailed, bolted or welded, as shown in FIG. It joins by joining etc. At this time, the connection member 4 is inserted into the through hole 41d, for example, using the through hole 41d formed in the vertical plate 41 as a front hole in a state where the web 24 of the floor joists 2 is disposed in the gap G1. The longitudinal plate 41 may be joined to the web 24 by means of a drill screw 43.

  In the joint structure 1 of the floor joist to which the present invention is applied, in the case where the receiving plate 42 is formed in the connecting member 4, the lower flange 23 of the floor joist 2 and the receiving plate 42 are screwed and nailed as needed. It is joined by joining, bolt joining or welding. At this time, with the lower flange 23 of the floor joist 2 inserted in the gap G2, the connecting member 4 is inserted into the through hole 41d using, for example, the through hole 41d formed in the receiving plate 42 as a front hole. The receiving plate 42 may be joined to the lower flange 23 by the drill screw 43.

  Thereby, in the joint structure 1 of the floor joist to which the present invention is applied, the web 24 of the floor joist 2 and the lower flange 23 are further strengthened by the drill screw 43 etc. from the state where the floor joist 2 is temporarily supported by the connection member 4 By being fixed, it becomes possible to transmit a shear force via the vertical plate 41 to improve the structural performance, and to improve the restraint of the floor joists 2 to surely prevent the floor ringing. It becomes. Moreover, the joint structure 1 of the floor joist to which the present invention is applied does not particularly process the web 24 or the lower flange 23 of the floor joist 2 by utilizing the through hole 41 d of the connection member 4 as the front hole. The floor joists 2 can be joined to the connecting member 4 with a drill screw 43 or the like.

  In the joint structure 1 of floor joists to which the present invention is applied, as shown in FIG. 5, the back plate 40 may be formed on only one side of the vertical plate 41 in the width direction Y. Thereby, the joint structure 1 of the floor joist to which the present invention is applied does not require welding or the like between the back plate 40 and the vertical plate 41, and the back plate 40 and the substantially flat plate steel plate etc. Since the vertical plate 41 is formed, the connection member 4 with high yield can be provided.

  In addition, the joint structure 1 of the floor joist to which the present invention is applied is not only for the floor joist 2 having a substantially H-shaped cross section shown in FIGS. 15 (a), 16 (a) and 17 (a) The floor joists 2 having a substantially C-shaped cross section shown in FIGS. 15 (b), 16 (b) and 17 (b) are also targets.

  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 as the joint structure 1 of the floor joist to which the present invention is applied. 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 joist 21: Flange 21a: middle part 21b: one end 22: upper flange 23: lower flange 24: lower flange 24: web 26: connection place 3: peripheral member 30: side surface of peripheral member 31: end End length 32: Column 4: Connection member 40: Back plate 40a: Joint side 40b: Lower end 41: Vertical plate 41a: Upper end 41b: Lower end 41c: Side surface 41d of vertical plate: Through hole 42: Receiving plate 42a: Upper surface 43: Drill screw 5: Projection piece 5a: Separation side edge 5b: Proximity side edge 5c: Base end 5d: Tip part 8: Building 80: Floor material X: Material axial direction Y: Width direction Z: Height direction

Claims (11)

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 back plate attached to the surrounding member, and a longitudinal plate protruding from the surrounding member and extending in the height direction of the floor joists.
The back plate is formed with a protruding piece protruding in the out-of-plane direction of the back plate,
A gap is formed between the protruding piece and the side surface of the vertical plate, and the protruding piece elastically deforms in the out-of-plane direction of the back plate. The connecting member for floor joists according to claim 1, wherein the projecting piece is formed by curving or bending in the vertical direction in the height direction of the floor joists. The projecting piece is formed such that the separated side edge separated from the vertical plate does not protrude from the back plate, and the near side edge adjacent to the vertical plate protrudes from the back plate in the out-of-plane direction The connecting member of the floor joist according to claim 1 or 2, characterized in that it is formed. The notch width of the width direction in the said backplate of the said protrusion piece becomes a magnitude | size of 0.75 times or more of the notch height of a height direction. It is characterized by the above-mentioned. Floor joist connection member. The connection member has a receiving plate extending in the width direction of the floor joists, and a gap is formed between the lower end portion of the vertical plate and the receiving plate. The connecting member for floor joists according to any one of the above. 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 back plate attached to the surrounding member, and a longitudinal plate protruding from the surrounding member and extending in the height direction of the floor joists.
The back plate is formed with a protruding piece protruding in the out-of-plane direction of the back plate,
A gap is formed between the protruding piece and the side surface of the vertical plate, and the protruding piece elastically deforms in the out-of-plane direction of the back plate,
In the floor joists, the web extending in the height direction is formed at an intermediate portion or one end portion in the width direction of the flange which is paired in the height direction, and between the side surface of the vertical plate and the projecting piece A bonded structure of floor joists characterized in that the web is joined to the vertical plate in a state where the web of the floor joists is disposed in the gap of. The joint structure of floor joists according to claim 6, wherein the floor joist is a drill screw inserted into a through hole penetrating the vertical board, and the web is joined to the vertical board. The connecting member has a receiving plate extending in the width direction of the floor joists, a gap is formed between the lower end of the vertical plate and the receiving plate, and the lower end of the vertical plate and the receiving plate The receiving plate is joined to the lower flange in a state in which the lower flange which becomes the flange of the lower part of the floor joist is inserted in the gap between the above and the above. Bonding structure of floor joists. The joint structure of floor joists according to claim 8, wherein the floor joist is a drill screw inserted into a through hole penetrating the backing plate, and the lower flange is joined to the backing plate. The projecting piece is disposed at a position above the center of gravity of the floor joist in a state where the web of the floor joist is disposed in the gap between the side wall of the vertical plate and the side face of the vertical plate. The joint structure of the floor joist according to any one of claims 6 to 9. 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 any one of claims 6 to 10, wherein a thin lightweight steel sheet on which the web is formed is used.

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