JP2013040521A - Joint structure and joint hardware for skeleton member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain superior flexural rigidity and bearing force of a joint part of a plurality of skeleton members, and to improve the degree of freedom of design of the skeleton structures.SOLUTION: A joint structure includes: joint hardware 10 which is provided with four cylindrical parts 12 extending from a hardware center part 11 in both sides of two crossing directions, and has a continuous cavity part formed in the hardware center part 11 and four cylindrical parts 12; a skeleton member 20 which are fitted and inserted into interiors of two cylindrical parts 12 facing each other with the hardware center part 11 interposed therebetween and the hardware center part 11; a skeleton member 30 which is fitted and inserted into interiors of the remaining cylindrical parts 12 of the joint hardware 10 from tip opening parts 12b thereof; through bolts 51, 52 which are arranged substantially in parallel with a structure plane that the skeleton member 20 and skeleton member 30 form and fitted in the cylindrical parts 12 together with both side faces of the cylindrical members 12, and penetrate the skeleton member 20 or skeleton member 30; and female screw members 53 which are threadably engaged with the through bolts 51, 52.

Description

  The present invention relates to a structure for joining a frame member and a metal fitting for joining a plurality of frame members.

  Conventionally, various structures have been proposed as a structure for joining frame members such as wooden shafts, pipes, and shaped steels using joining members (see, for example, Patent Documents 1 and 2).

  Patent Document 1 discloses that a plurality of aggregates are joined using a connection fitting having a plurality of U-shaped connection pieces into which a plurality of aggregates can be inserted. In this structure, after inserting the ends of each of the plurality of aggregates into the plurality of connection pieces of the connection fitting and screwing screws or the like into the aggregate through the connection pieces, the plurality of aggregates are joined. The

  In patent document 2, the point which joins a some rod-shaped member using the joint member which has the some pipe part which can each fit a some rod-shaped member is disclosed. This joint member is configured by connecting divided joint members that are divided into two symmetrically in the vertical direction with bolts and nuts, and by fitting the end portions of the rod-shaped members to each of the plurality of pipe portions, A rod-shaped member is joined.

Japanese Utility Model Publication No. 63-34203 JP 2000-129800 A

  By the way, a lattice-like frame structure is assembled by joining a plurality of frame members, and various panel structures such as solar panels are installed on the surface formed by the frame structure. It may be used as a panel structure mount. In this case, since the stress in the out-of-plane direction acts on the frame structure due to the load from the panel structure, etc., the joint portion between the frame members is excellent with respect to the stress in the out-of-plane direction. It is required to exhibit high bending rigidity and yield strength.

  For such a required performance, in the joint structure of Patent Document 1, since the connecting piece into which the aggregate is inserted is formed in a U-shape, the stress in the out-of-plane direction acting on the aggregate is caused by the connecting hardware. However, it is difficult to exhibit excellent bending rigidity and proof stress. Moreover, in the joint structure of patent document 2, since it will resist with the volt | bolt and nut which couple | bond a division | segmentation joint member with respect to the stress of the out-of-plane direction transmitted from the aggregate to the connection metal fitting, excellent bending rigidity, There is a problem that it is difficult to exert proof stress.

  Moreover, when using the above-mentioned frame structure as a panel structure frame, it is required to reduce the thickness of the frame structure itself from the viewpoint of increasing the degree of design freedom. With respect to such required performance, the disclosed techniques of Patent Document 1 and Patent Document 2 are such that heads and nuts such as bolts and screws protrude in the out-of-plane direction of the construction surface formed by the aggregate and the like. Therefore, there is a problem that the thickness of the frame structure is increased correspondingly, and the degree of freedom in design is reduced.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is excellent in bending rigidity and proof stress at a joint portion of a plurality of frame members, and the structure of the frame structure. An object of the present invention is to provide a joint structure for a frame member and a joint hardware that can improve the degree of freedom of design.

  In order to solve the above-described problems, the present inventor has invented the following frame member joining structure and metal fittings after extensive studies.

  The frame member joining structure according to the first aspect of the present invention is provided with four cylindrical portions extending on both sides in two directions intersecting from a hardware central portion, and a hollow portion continuous inside the hardware central portion and the four cylindrical portions. A first metal frame member that is fitted into and inserted into the two metal parts that are opposed to each other with the metal part central part interposed therebetween, and the remainder of the metal part. A second frame member fitted and inserted into each of the cylindrical parts from the opening of the front end thereof, and arranged substantially parallel to the construction surface formed by the first frame member and the second frame member. A through bolt passing through the first frame member or the second frame member fitted into the cylindrical portion together with both side surfaces of the portion, and a female screw member screwed into the through bolt. .

  The joining structure of the frame member according to the second invention is provided with a cylindrical portion extending from the hardware central portion to one side in one direction and two cylindrical portions extending from the hardware central portion to both sides in the other direction intersecting the one direction. And the fitting metal part in which a continuous hollow part is formed inside the metal center part and the three cylindrical parts, and the fitting from the tip opening part of the cylindrical part on one side in one direction to the inside of the metal part central part. The first frame member inserted into the second cylindrical member, the second frame member fitted into each of the remaining cylindrical portions of the metal fitting from the tip opening, and the first frame member and the second frame A through bolt passing through the first frame member or the second frame member, which is disposed substantially parallel to the structural surface formed by the member and fitted into the cylindrical portion together with both side surfaces of the cylindrical portion, and the through bolt Screwed female screw member It is characterized in.

  The joining structure of the frame member according to the third invention is provided in the insertion part of the second frame member inserted into the cylindrical part in the first invention or the second invention, and is in the out-of-plane direction of the construction surface. A stiffening member for resisting stress is further provided.

  According to a fourth aspect of the present invention, there is provided the frame member joining structure according to any one of the first to third aspects, wherein the second frame member is a pair of grooves arranged in opposite directions with the outer surfaces of the web portions in contact with each other. It is made of a section steel, and is provided in the insertion part of the second frame member inserted into the cylindrical part, and in the channel steel so as to close a side opening formed in a side part of the channel steel. Further comprising a stiffening member.

  According to a fifth aspect of the present invention, there is provided a frame member joining structure according to the fourth aspect, wherein the stiffening member is formed at a web portion provided so as to close the side opening and a longitudinal end portion of the channel steel. It has the 1st flange part provided so that the end surface opening part which closed may be closed, and the 2nd flange part provided so that the front-end | tip opening part of the said cylindrical part may be closed.

  According to a sixth aspect of the present invention, there is provided the frame member joining structure according to the fifth aspect, wherein the stiffening member has the web portion joined to the channel steel.

  In any one of the first to sixth inventions, the frame member joining structure according to a seventh aspect of the present invention is such that the hardware center portion and the cylindrical portion are integrally formed by hydroforming. It is characterized by that.

  In any one of the first to seventh inventions, the joint structure of the frame member according to the eighth aspect of the present invention is such that the central part of the hardware and the cylindrical part are joined together by welding a plurality of members. It is characterized by being formed.

  The metal joint according to the ninth invention is used in the joint structure for a frame member according to any one of the first to eighth inventions.

  According to the first invention, since the first frame member is not divided like the second frame member in the joint hardware, there is no loss of stress transmission due to the division, and the out-of-plane direction of the structural surface formed by each frame member It is possible to exhibit an excellent bending rigidity and proof stress against the stress of. Moreover, since each frame member is fitted in the cylindrical part of the joint metal, stress can be transmitted by surface contact between each of the frame members and the cylindrical part. The loss of stress transmission between the frame members is reduced, and it is possible to exhibit excellent bending proof strength and proof strength against the stress in the out-of-plane direction of the structural surface formed by each frame member. In addition, when joining each frame member and the joint hardware, it is only necessary to pass through the through bolts, and friction joining with the through bolts is unnecessary, and accordingly, the number of bolts can be suppressed, and a plurality of frames can be suppressed. It becomes possible to reduce the size of the entire joint portion of the member. In addition, since the first frame member and the second frame member are arranged on substantially the same plane, the bolt head portion of the through bolt and the female screw member do not protrude in the out-of-plane direction of the construction surface formed by each frame member. The thickness of the frame structure formed by each frame member can be reduced, and the degree of design freedom in the thickness direction of the frame structure can be improved accordingly.

  According to the second invention, since each frame member is fitted in the cylindrical part of the joint metal, stress can be transmitted by surface contact between each frame member and the cylindrical part. Loss of stress transmission between the member and the joint metal is reduced, and it is possible to exhibit excellent bending proof strength and proof strength against the stress in the out-of-plane direction of the structural surface formed by each frame member. In addition, when joining each frame member and the joint hardware, it is only necessary to pass through the through bolts, and friction joining with the through bolts is unnecessary, and accordingly, the number of bolts can be suppressed, and a plurality of frames can be suppressed. It becomes possible to reduce the size of the entire joint portion of the member. In addition, since the first frame member and the second frame member are arranged on substantially the same plane, the bolt head portion of the through bolt and the female screw member do not protrude in the out-of-plane direction of the construction surface formed by each frame member. The thickness of the frame structure formed by each frame member can be reduced, and the degree of design freedom in the thickness direction of the frame structure can be improved accordingly.

  According to the third aspect of the invention, since the stiffening member is provided in the insertion portion of the second frame member inserted into the cylindrical portion, the stress in the out-of-plane direction of the structural surface formed by each frame member is the second frame. Even when acting on the insertion part of the member, it is possible to exhibit excellent bending rigidity and proof stress.

  According to the fourth aspect of the present invention, the axially orthogonal cross section of the second frame member is provided by the flange portion of each of the pair of channel steels and the web portion of the stiffening member so as to form a box-shaped steel shape. As a result, when the stress in the out-of-plane direction of the structural surface formed by each frame member acts on the second frame member, the deformation that narrows the side surface opening of the channel steel is suppressed, and the second portion into the cylindrical portion is suppressed. It becomes possible to improve the bending rigidity of the insertion part of the frame member.

  According to 5th invention, it will be in the state by which the diaphragm was provided in a pair of channel steel by the 1st flange part of each of two stiffening members, and each 2nd flange part. The diaphragm formed by the stiffening member, the flange portions of the pair of channel steels, and the web portion of the stiffening member are provided so that the insertion portion of the second frame member into the cylindrical portion forms a cube shape. It will be. This diaphragm has a pair of grooved steel end face openings and a tip of the cylindrical part, which are positions where stress in the out-of-plane direction is likely to act strongly, in the insertion part of the second frame member into the cylindrical part. An opening is provided at a certain position. Thereby, it becomes possible to aim at the further improvement of the bending rigidity of the insertion part of the 2nd frame member in a cylindrical part.

  According to the sixth invention, the stiffening member can be integrated with the channel steel, and the bending rigidity of the insertion portion of the second frame member can be further improved, and the rigidity of the insertion portion against torsion can be increased. Can be improved. In addition, when a pulling-out force that tries to slip out from the inside of the cylindrical portion of the joint hardware acts on the second frame member, the pull-out force is not transmitted from the web portion of the channel steel but from the web portion of the stiffening member. It becomes possible to transmit to the side surface of the cylindrical portion via the. At this time, since the distance from the web portion of the stiffening member to the side surface of the tubular portion is shorter than the distance from the web portion of the channel steel to the side surface of the tubular portion, The acting moment is reduced, and as a result, the deformation amount of the through bolt due to the pull-out force can be suppressed, so that the second frame member can be more effectively prevented from slipping out from the cylindrical portion. .

It is a top view which shows the frame structure comprised by joining the some frame member arrange | positioned at the grid | lattice form. It is a side view which shows typically the state which uses the lattice-shaped frame structure as a gantry for panel structures. It is a perspective view which shows the structure of the joining structure of the frame member which concerns on 1st Embodiment. It is a disassembled perspective view which shows the structure of the joining structure of the frame member which concerns on 1st Embodiment. It is a plane sectional view showing composition of a joining structure of a frame member concerning a 1st embodiment. It is AA sectional view taken on the line of FIG. FIG. 6 is a sectional view taken along line BB in FIG. 5. It is a plane sectional view showing composition of a metal fitting used in a joining structure of a frame member concerning a 1st embodiment. It is a side view which shows the structure of the joining metal fitting used with the joining structure of the frame member which concerns on 1st Embodiment. It is a front view which shows the structure of the joining metal fitting used with the joining structure of the frame member which concerns on 1st Embodiment. It is a side view which shows the structure of the 2nd frame member used with the joining structure of the frame member which concerns on 1st Embodiment. It is a plane sectional view showing the composition of the 2nd frame member used with the joined structure of the frame member concerning a 1st embodiment. It is a front view which shows the structure of the 2nd frame member used with the joining structure of the frame member which concerns on 1st Embodiment. It is a plane sectional view showing composition of a joining structure of a frame member concerning a 2nd embodiment. It is a plane sectional view showing composition of a metal fitting used in a joining structure of a frame member concerning a 2nd embodiment. It is a figure for demonstrating the hydroforming processing method used in order to obtain the metal joint which concerns on 1st Embodiment. (A) is a perspective view which shows an example of a hydrofoam processed product, (b) is a perspective view which shows the joining metal fitting obtained from the hydroform processed product. (A) is a disassembled perspective view of the metal joint obtained by joining a plurality of members, and (b) is a perspective view showing the configuration of the metal joint.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment for carrying out a joining structure of frame members to which the present invention is applied will be described in detail with reference to the drawings.

  First, the joining structure of the frame member according to the first embodiment will be described.

  As shown in FIGS. 1 to 7, the frame member joining structure 1 is used to join a plurality of frame members 20, 30, and in the first embodiment, a plurality of frame members arranged in a lattice shape. The case where it uses as what joins 20 and 30 is illustrated. The frame structure 3 configured by joining a plurality of frame members 20 and 30 arranged in a lattice shape in this way is installed on a support surface 4 via a column 6 or the like, for example, as shown in FIG. The panel structure 5 such as a solar panel is installed on the frame structure 3 to be used as a panel structure mount.

  As shown in FIGS. 3 to 5, the frame member joining structure 1 according to the first embodiment is arranged in series with the first frame member 20 and the intermediate portion of the first frame member 20 interposed therebetween. Two second frame members 30, and a joint hardware 10 that is arranged at the intersection 3 a of the first frame member 20 and the second frame member 30 and joins the first frame member 20 and the second frame member 30. ing. The frame member joining structure 1 according to the first embodiment is used in a cross-shaped crossing portion 3a such as portion A in FIG.

  As shown in FIGS. 8 to 10, the joint hardware 10 is provided with four cylindrical portions 12 extending on both sides in two directions intersecting from the hardware central portion 11, and the metal central portion 11 and the four cylindrical portions 12. A continuous cavity 13 is formed inside. The metal joint 10 according to the first embodiment is formed in a cross shape in plan view by the metal center part 11 and the four cylindrical parts 12, and the cavity 13 provided therein also has a cross shape in plan view. Will be formed.

  In the metal joint 10, the metal central part 11 and the four cylindrical parts 12 are integrally formed. In the first embodiment, the case where these parts are integrally formed by hydroforming is illustrated. Yes. Details of this will be described later. In addition to this, the metal joint 10 may be integrally formed by joining a plurality of members with the metal central part 11 and the four cylindrical parts 12 by welding. Moreover, the joining hardware 10 is comprised from metal materials, such as steel materials.

  The cylindrical portion 12 is formed with an opening at the tip. In the first embodiment, the cylindrical portion 12 is formed in a rectangular cylindrical shape in an axially orthogonal cross section.

  In the cylindrical portion 12, a pair of bolt insertion holes 14 are formed on both side surfaces 12 a in the in-plane direction of the construction surface S formed by the first frame member 20 and the second frame member 30. As will be described later, a single through bolt 51, 52 is inserted into the pair of bolt insertion holes 14.

  Each of the first frame member 20 and the second frame member 30 is formed in a shape in which the respective axial orthogonal cross sections can be fitted to the cylindrical portion 12 of the metal joint 10. At this time, the 1st frame member 20 and the 2nd frame member 30 are fitted so that the outer peripheral surface may contact the internal peripheral surface of the cylindrical part 12 of the joining metal object 10. FIG. In 1st Embodiment, each of the 1st frame member 20 and the 2nd frame member 30 is comprised from a pair of lip channel steel 40 arrange | positioned in the opposite direction by making the outer surface of each web part 41 contact. . In addition, the 1st frame member 20 and the 2nd frame member 30 may be comprised from a pair of channel steel without the box-shaped steel of a rectangular cylinder shape, or the lip | rip part 43, for example. When a pair of lip groove steels 40 or a pair of groove steels is used, an operator inserts a fastener such as a screw into the lip groove steel 40 or the like from the side opening 44 between the upper and lower flange portions 42. The fastener can be screwed into the panel structure 5 disposed on each of the frame members 20 and 30 from the inside of the lip groove steel 40 or the like, and the work at the time of attaching the panel structure 5 It is possible to improve the performance. Note that the pair of lip channel steels 40 and the pair of channel steels are fixed by fasteners such as screws (not shown) screwed into the web portions 41.

  The 1st frame member 20 and the 2nd frame member 30 are comprised from the thin plate lightweight shape steel in 1st Embodiment. The thin lightweight steel mentioned here is formed by bending a thin steel plate having a thickness of 2.3 mm or less by roll forming or the like. , Groove steel, box steel and the like.

  The first skeleton member 20 is inserted and fitted into the inside of the two cylindrical portions 12 and the hardware central portion 11 which are opposed to each other with the metal central portion 11 of the metal joint 10 interposed therebetween. In the example of FIG. 5, the first frame member 20 is inserted and fitted in the order of the upper cylindrical portion 12 in the drawing, the hardware central portion 11, and the lower cylindrical portion 12 in the drawing.

  The first frame member 20 has a bolt insertion hole that is coaxially aligned with the pair of bolt insertion holes 14 formed in the cylindrical portion 12 in the insertion portion 21 inserted into the cylindrical portion 12 of the metal joint 10. 22 is formed. In the first embodiment, the bolt insertion hole 22 is formed in the web portion 41 of each of the pair of lip groove steels 40 constituting the first frame member 20.

  A first through bolt 51 is inserted into the bolt insertion hole 22 of the first frame member 20 and the pair of bolt insertion holes 14 of the tubular portion 12 in which the first frame member 20 is fitted. Thereby, as shown in FIG. 7 etc., the 1st through-hole bolt 51 penetrates the 1st frame member 20 with the both side surfaces 12a of the cylindrical part 12, and the 1st frame member 20 and the 2nd frame member 30 make | form. It is arranged substantially parallel to the composition surface S. The first through bolt 51 is fixed to the metal joint 10 by screwing a female screw member 53 such as a nut. In the first embodiment, the female screw member 53 exemplifies a case where the female screw member 53 is configured by a nut screwed to the tip portion 51a protruding from the cylindrical portion 12 of the first through bolt 51. The nut may be welded to the cylindrical portion 12 on the bolt head 51b side of the first through bolt 51, or may be configured from a female screw hole formed in the bolt insertion hole 14 of the cylindrical portion 12.

  The first through bolts 51 are used for the purpose of preventing the displacement of the first frame member 20 with respect to the metal joint 10, and it is sufficient if those having a number and a diameter that can achieve such a purpose are used. . In the illustrated example, one first through bolt 51 is used for one cylindrical portion 12.

  The second frame member 30 is inserted into each of the remaining cylindrical parts 12 of the cylindrical part 12 through which the first frame member 20 of the metal joint 10 is inserted from the tip opening 12b. In the example of FIG. 5, the second skeleton member 30 is inserted into the cylindrical portion 12 on the right side in the drawing from the distal end opening portion 12b, and is inserted into the cylindrical portion 12 on the left side in the drawing from the distal end opening portion 12b. Is plugged in. In the illustrated example, the second skeleton member 30 is inserted until it contacts the side surface of the first skeleton member 20, but it may not be in contact.

  As shown in FIG. 6 and the like, the second frame member 30 is coaxial with the pair of bolt insertion holes 14 formed in the cylindrical portion 12 in the insertion portion 31 inserted into the cylindrical portion 12 of the metal joint 10. Bolt insertion holes 32 are formed so as to line up. In the first embodiment, the bolt insertion holes 32 are formed in the web portions 41 of each of the pair of lip groove steels 40 constituting the second frame member 30.

  A second through bolt 52 is inserted into the bolt insertion hole 32 of the second frame member 30 and the pair of bolt insertion holes 14 of the tubular portion 12 in which the second frame member 30 is fitted. Thereby, the 2nd penetration bolt 52 penetrates the 2nd penetration bolt 52 with both sides 12a of cylindrical part 12, and is arranged in parallel with the construction surface S which the 1st frame member 20 and the 2nd frame member 30 make. Will be. The second through bolt 52 is fixed to the metal joint 10 by screwing a female screw member 53 such as a nut.

  The second through bolts 52 are used for the purpose of preventing the second frame member 30 from slipping out of the tubular portion 12 of the joint hardware 10 and have a number and diameter that can achieve such a purpose. It may be used. In the illustrated example, four second through bolts 52 are used for one cylindrical portion 12.

  Since the 2nd frame member 30 which concerns on 1st Embodiment is comprised from a pair of lip channel steel 40, the stress of the out-of-plane direction Q of the structural surface S which the 1st frame member 20 and the 2nd frame member 30 make | form As shown in FIG. 11, the structure is easily deformed as a whole in the direction P such that the side opening 44 narrows. This tendency is particularly strong in the insertion portion 31 inserted into the cylindrical portion 12 that is the end portion of the second frame member 30, and therefore, the bending rigidity of the insertion portion 31 with respect to the stress in the out-of-plane direction Q. It is difficult to secure the yield strength. In order to solve this, the second frame member 30 according to the first embodiment resists stress in the out-of-plane direction Q of the construction surface S in the insertion portion 31 inserted into the cylindrical portion 12. The stiffening member 60 is provided.

  As shown in FIGS. 5 and 11 to 13, the stiffening member 60 according to the first embodiment is inserted into the lip groove steel 40 so as to close the side opening 44 of the lip groove steel 40. A first flange portion 62 provided so as to close the end face opening 45 formed at the longitudinal end portion of the lip groove steel 40, and a distal end opening portion 12 b of the tubular portion 12. And a second flange portion 63 provided so as to close the cover. The stiffening member 60 according to the first embodiment has a first flange portion 62 and a second flange portion 63 on both ends of the web portion 61, respectively. A bolt insertion hole 64 is formed in the web portion 61 of the stiffening member 60 so as to be aligned coaxially with the pair of bolt insertion holes 14 formed in the tubular portion 12 as shown in FIG. The stiffening member 60 according to the first embodiment is formed in a U shape by a web portion 61, a first flange portion 62, and a second flange portion 63, and these are integrally provided. The stiffening member 60 is made of a metal material such as steel.

  In the first embodiment, each of the web portion 61, the first flange portion 62, and the second flange portion 63 of the stiffening member 60 is formed between a pair of upper and lower flange portions 42 of the lip groove steel 40 as shown in FIG. 11. The height dimension is formed so as to be approximately the same length as the interval. Thereby, the web part 61, the first flange part 62, and the second flange part 63 of the stiffening member 60 are provided in contact with the inner surfaces of the pair of upper and lower flange parts 42 of the lip groove steel 40. . In the first embodiment, each of the first flange portion 62 and the second flange portion 63 of the stiffening member 60 is substantially the same as the distance between the lip portion 43 of the lip groove steel 40 and the web portion 41. The width dimension is formed to be a length. As a result, the inner surface of the web portion 41 and the inner surface of the lip portion 43 of the lip groove steel 40 are provided in contact with the first flange portion 62 and the second flange portion 63 of the stiffening member 60.

  As shown in FIG. 11, the pair of lip groove sections 40 constituting the second skeleton member 30 are closed by the web portions 61 of the stiffening members 60, so that the pair of lip grooves By the flange part 42 of each shape steel 40 and the web part 61 of the stiffening member 60, the axis orthogonal cross section is provided so as to form a box-shaped steel shape. Thereby, when the stress in the out-of-plane direction Q of the composition surface S acts on the second frame member 30, the deformation such that the side opening 44 of the lip groove steel 40 is narrowed is suppressed, and into the cylindrical portion 12. It is possible to improve the bending rigidity of the insertion portion 31 of the second frame member 30.

  Further, as shown in FIG. 5 and the like, the stiffening member 60 provided in each of the pair of lip channel steels 40 is such that each of the first flange portion 62 and the second flange portion 63 is located on substantially the same plane. Provided. In the pair of lip channel steels 40 constituting the second frame member 30, each end face opening 45 is closed by the first flange part 62 of the stiffening member 60, and the tip opening part 12 b of the cylindrical part 12 is closed. By being blocked by the second flange portion 63 of the stiffening member 60, the first flange portion 62 of each of the two stiffening members 60 and the respective second flange portions 63 allow the inside of the pair of lip channel steels 40. In this state, two diaphragms are provided. The difference between the second frame member 30 into the tubular portion 12 by the two diaphragms formed by the stiffening member 60, the flange portions 42 of the pair of lip groove steels 40, and the web portion 61 of the stiffening member 60. The insert portion 31 is provided so as to form a cube shape. This diaphragm is a position where the stress in the out-of-plane direction Q is likely to act strongly in the insertion portion 31 of the second frame member 30 into the cylindrical portion 12, and the end face opening portions of the pair of lip channel steels 40. 45 and the tip opening 12b of the cylindrical portion 12 are provided at a certain position. Thereby, it becomes possible to aim at the further improvement of the bending rigidity of the insertion part 31 of the 2nd frame member 30 in the cylindrical part 12. FIG.

  The first flange portion 62 of each of the two stiffening members 60 is provided at a position closer to the inner side in the axial direction than the end face opening 45 of the pair of lip groove steel 40, and the second stiffening member 60 has a second flange portion 60. The flange portion 63 is provided at a location closer to the inner side in the axial direction than the distal end opening portion 12 b of the cylindrical portion 12. Thereby, it is possible to prevent the first flange portion 62 of the stiffening member 60 from slipping out of the pair of lip channel steels 40 and coming off when the entire frame structure 3 is largely deformed.

  Further, as shown in FIG. 13, the web portion 61 of the stiffening member 60 is joined to the lip groove steel 40 by welding or the like. In the stiffening member 60 according to the first embodiment, the web portion 61 is joined to the lip portion 43 of the lip groove steel 40 by fillet welding W. As a result, the stiffening member 60 can be integrated with the lip channel steel 40, and the bending rigidity of the insertion portion 31 of the second frame member 30 can be further improved and the twist of the insertion portion 31 can be increased. It is possible to improve the rigidity against the above. Further, when a pulling-out force that tries to pull out from the cylindrical portion 12 of the metal joint 10 is applied to the second frame member 30, the pull-out force is not stiffened from the web portion 41 of the lip groove steel 40. It is possible to transmit from the web portion 61 of the member 60 to the side surface 12a of the cylindrical portion 12 via the second through bolt 52. At this time, as shown in FIG. 6, from the distance L1 from the web portion 41 of the lip groove steel 40 to the side surface 12a of the cylindrical portion 12, from the web portion 61 of the stiffening member 60 to the side surface 12a of the cylindrical portion 12. Since the distance L2 is shorter, the moment acting on the second through bolt 52 is reduced by the action of the withdrawal force, and as a result, the deformation amount of the second penetration bolt 52 due to the withdrawal force can be suppressed. Further, it is possible to more effectively prevent the second frame member 30 from coming out of the cylindrical portion 12. At this time, the bolt insertion hole 32 of the web portion 41 of the lip groove steel 40 is provided as a stiffening member so that stress is not transmitted from the web portion 41 of the lip groove steel 40 to the second through bolt 52 due to the action of the withdrawal force. It is desirable to make it larger than the bolt insertion hole 64 of the 60 web portions 61.

  In addition, the improvement effect of the bending rigidity of the 2nd frame member 30 by the above-mentioned stiffening member 60 is comprised from a pair of channel steel in which a pair of lip groove steel 40 which comprises the 2nd frame member 60 does not have the lip | rip part 43. It is obtained in the same way.

  According to the above 1st Embodiment, since the 1st frame member 20 is not divided | segmented like the 2nd frame member 30 in the joining metal fitting 10, the loss of the stress transmission by the division | segmentation loses, and each frame member 20, It is possible to exhibit excellent bending rigidity and yield strength against the stress in the out-of-plane direction Q of the structural surface S formed by 30. Moreover, since each frame member 20 and 30 is fitted in the cylindrical part 12 of the joint metal fitting 10, stress can be transmitted by the surface contact between each frame member 20 and 30 and the cylindrical part 12. Therefore, the loss of stress transmission between the frame members 20 and 30 and the metal joint 10 is reduced, and excellent bending strength and proof strength are exhibited with respect to the stress in the out-of-plane direction Q of the above-described structural surface S. It becomes possible. Further, in order to join the frame members 20 and 30 and the metal joint 10, it is only necessary to pass through the through bolts 51 and 52, and friction joining by the through bolts 51 and 52 is unnecessary. The number can be reduced, and the overall size of the joining structure 1 can be reduced. Further, the first frame member 20 and the second frame member 30 are arranged on substantially the same plane, and the through bolts 51 and 52 are arranged in the out-of-plane direction Q of the construction surface S formed by the frame members 20 and 30. Since the bolt heads 51 b and 52 b and the female screw member 53 do not protrude, the thickness of the frame structure 3 formed by the frame members 20 and 30 can be reduced, and accordingly, in the thickness direction of the frame structure 3. It is possible to improve the degree of design freedom.

  Further, since the stiffening member 60 is provided in the insertion portion 31 of the second frame member 30 inserted into the cylindrical portion 10, the stress in the out-of-plane direction Q of the construction surface S is caused by the second frame member 30. Even when it acts on the insertion part 31, it is possible to exhibit excellent bending rigidity and proof stress.

  Next, the joining structure of the frame member according to the second embodiment will be described. In addition, about the component same as the component mentioned above, the description below is abbreviate | omitted by attaching | subjecting the same code | symbol.

  As shown in FIG. 14, the frame member joining structure 1 according to the second embodiment includes a first frame member 20 and two second frames arranged in series with an end portion of the first frame member 20 interposed therebetween. The frame member 30 includes a metal fitting 10 that is disposed at the intersection 3 a between the first frame member 20 and the second frame member 30 and that joins the first frame member 20 and the second frame member 30. The frame member joining structure 1 according to the second embodiment is used for a T-shaped intersection 3a such as part B in FIG.

  As shown in FIG. 15, the metal joint 10 is provided with a cylindrical part 12 extending from the metal central part 11 to one side in the direction A, and two cylindrical parts 12 extending on both sides in the direction B intersecting the direction A. A continuous cavity 13 is provided inside the hardware central part 11 and the three cylindrical parts 12. The metal joint 10 according to the second embodiment is formed in a T shape in plan view by the metal center part 11 and the three cylindrical parts 12, and the cavity 13 formed inside thereof is also T in plan view. It is formed in a letter shape.

  The first skeleton member 20 is inserted from the tip opening 12b of the cylindrical portion in the direction A to the inside of the hardware central portion 11, and is inserted until it contacts the inner surface of the hardware central portion 11 in the first embodiment. It is.

  According to the second embodiment described above, each frame member 20, 30 is fitted into the tubular part 12 of the metal joint 10, so that the surface contact between each frame member 20, 30 and the tubular part 12 is achieved. Therefore, the stress transmission loss between each of the frame members 20 and 30 and the joint hardware 10 is reduced, and the stress in the out-of-plane direction Q of the above-described surface S is reduced accordingly. It is possible to exhibit excellent bending strength and proof strength. Further, in order to join the frame members 20 and 30 and the metal joint 10, it is only necessary to pass through the through bolts 51 and 52, and friction joining by the through bolts 51 and 52 is unnecessary. The number can be reduced, and the overall size of the joining structure 1 can be reduced. Further, the first frame member 20 and the second frame member 30 are arranged on substantially the same plane, and the through bolts 51 and 52 are arranged in the out-of-plane direction Q of the construction surface S formed by the frame members 20 and 30. Since the bolt heads 51 b and 52 b and the female screw member 53 do not protrude, the thickness of the frame structure 3 formed by the frame members 20 and 30 can be reduced, and accordingly, in the thickness direction of the frame structure 3. It is possible to improve the degree of design freedom.

  Next, an example of the manufacturing method of the metal joint 10 according to each embodiment will be described.

  In the above-described joining hardware 10, for example, the hardware central portion 11 and the plurality of cylindrical portions 12 are integrally formed by hydroforming. In this hydroforming, as shown in FIG. 16 (a), upper and lower molds 71 having cavities 72 having substantially the same inner shape as the outer shape obtained by dividing a tubular hydroformed product in the direction perpendicular to the tube axis are used. Do it.

  In performing hydroforming, first, a material pipe 81 serving as a material of a hydroformed product is disposed in the cavity 72 of the mold 71. Next, as shown in FIG. 16B, the upper and lower molds 71 are closed. Next, as shown in FIG. 16C, the liquid W is supplied to the inside of the material tube 81 to apply an internal pressure, and a compressive load is applied to the material tube 81 by the axial push punch 73 in the tube axis direction. To load. Thus, as shown in FIG. 16D, the material pipe 81 is compressed in the pipe axis direction while expanding the diameter along the cavity 72 of the upper and lower molds 71, so that the inner shape of the cavity 72 of the mold 71 is compressed. A hydroformed product having an outer shape along the line is obtained.

  At this time, in order to obtain the cross-shaped joint metal fitting 10 according to the first embodiment described above, as shown in FIG. 17 (a), the cylindrical portion 12 into which the second frame member 30 is fitted is a processed material. The tube 81 is located at both ends 81a in the tube axis direction, and the tubular portion 12 into which the first frame member 20 is fitted is formed into the enlarged diameter portions 81b formed on both sides in the radial direction of the material tube 81 after processing. In addition, the shape of the cavity 72 of the upper and lower molds 71 is adjusted. As a result, the distal end portion 81c of the enlarged diameter portion 81b of the material pipe 81 is closed and formed after the hydroforming, so that by cutting the distal end portion 81c of the enlarged diameter portion 81b, FIG. As shown to b), the metal joint 10 which concerns on the above-mentioned 1st Embodiment is obtained. When obtaining the T-shaped metal joint 10 according to the second embodiment, it is the same as described above except that only one enlarged diameter portion 81b is formed on one radial direction side of the material pipe 81.

  In general hydroforming, there is a characteristic that the maximum width of the enlarged diameter portion 81b of the material pipe 81 is determined according to the diameter of the material pipe 81 itself. Specifically, the maximum width of the enlarged diameter portion 81b of the material pipe 81 is ½ of the diameter of the material pipe 81 when the two enlarged diameter portions 81b are formed on both radial sides of the material pipe 81. In the case where one enlarged-diameter portion 81b is formed on one side in the radial direction, the diameter is the same as the diameter of the material tube 81. If hydroforming is performed so that the width exceeds the maximum width, a burst of the material pipe 81 may occur. For this reason, in order to obtain the joint metal 10 by a general hydroforming process, the joint metal 10 having such a dimension that the burst of the material pipe 81 does not occur is manufactured in consideration of this.

  In addition, when obtaining the metal joint 10 by hydroforming, there is an advantage that the metal joint 10 having excellent dimensional accuracy can be obtained with high productivity.

  In addition, as shown in FIG. 18, for example, the metal joint 10 described above may be integrally formed by joining a metal central part 11 and a plurality of cylindrical parts 12 by welding a plurality of members. . The joint hardware 10 in this case is, for example, a pair of first divided members 91 having a shape obtained by dividing the hardware central portion 11 and the two cylindrical portions 12 in the vertical direction, and the remaining cylindrical portions 12 in the vertical direction. Each of the pair of second divided members 92 having a shape that is divided into two symmetrically is joined by welding such as fillet weld W or the like.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be construed as limiting.

  For example, the stiffening member 60 may be provided in the insertion portion 21 of the first skeleton member 20 inserted into the tubular portion 12. Further, when the first frame member 20 and the second frame member 30 are formed of a rectangular tubular box-shaped steel, a pair of groove-shaped steel using the above-described stiffening member 60, the through bolt 51, As an alternative to 52, each of the both side surfaces of the tubular portion 12 of the metal joint 10 may be joined by screws.

DESCRIPTION OF SYMBOLS 1 Joining structure 3 Frame structure 3a Crossing part 10 Joint metal object 11 Metal | metal part center part 12 Cylindrical part 13 Cavity part 20 First frame member 30 Second frame member 31 Insertion part 40 Lip channel steel 44 Side surface opening part 45 End surface opening Part 51 First through bolt 52 Second through bolt 53 Female thread member 60 Stiffening member 61 Web part 62 First flange part 63 Second flange part S

Claims (9)

Four cylindrical portions extending on both sides intersecting from the central portion of the hardware are provided, and a joint hardware in which a continuous cavity is formed inside the central portion of the hardware and the four cylindrical portions, and
A first skeleton member fitted into and inserted into two metal parts opposed to each other with the metal part central part in between, and the metal part central part,
A second framework member inserted into each of the remaining cylindrical portions of the joint metal fitting from the tip opening,
The first skeleton member or the second skeleton member, which is disposed substantially parallel to a construction surface formed by the first skeleton member and the second skeleton member, and is fitted into the cylindrical portion together with both side surfaces of the cylindrical portion. A through bolt that penetrates,
A frame member joining structure comprising: a female screw member screwed into the through bolt. A cylindrical portion extending from the hardware central portion to one side in one direction and two cylindrical portions extending from the hardware central portion to both sides in the other direction intersecting the one direction are provided, the hardware central portion and the three cylindrical shapes A metal joint in which a continuous cavity is formed inside the part;
A first skeleton member fitted and inserted from the tip opening of the cylindrical portion on one side of the one direction to the inside of the hardware central portion;
A second framework member inserted into each of the remaining cylindrical portions of the joint metal fitting from the tip opening,
The first skeleton member or the second skeleton member, which is disposed substantially parallel to a construction surface formed by the first skeleton member and the second skeleton member, and is fitted into the cylindrical portion together with both side surfaces of the cylindrical portion. A through bolt that penetrates,
A frame member joining structure comprising: a female screw member screwed into the through bolt. The stiffening member provided in the insertion part of the said 2nd frame member inserted in the said cylindrical part, and resisting the stress of the out-of-plane direction of the said construction surface is further provided. 2. A joining structure of frame members according to 2. The second frame member is composed of a pair of channel steels arranged in opposite directions in contact with the outer surfaces of each other's web parts,
In the insertion part of the second frame member inserted into the cylindrical part, a stiffening member provided in the channel steel so as to close a side opening formed in a side part of the channel steel. The frame member joining structure according to any one of claims 1 to 3, further comprising: The stiffening member includes a web portion provided so as to close the side opening, a first flange portion provided so as to close an end face opening formed in a longitudinal end portion of the channel steel, The frame member joining structure according to claim 4, further comprising: a second flange portion provided so as to close a distal end opening of the cylindrical portion. The said stiffening member has the said web part joined to the said channel steel, The joining structure of the frame member of Claim 5 characterized by the above-mentioned. The said joining metal object WHEREIN: The said metal | metal | money center part and the said cylindrical part are integrally formed by the hydroforming process. The joining structure of the frame member in any one of Claims 1-6 characterized by the above-mentioned. The frame member according to any one of claims 1 to 6, wherein the metal joint is formed integrally by joining the metal central portion and the cylindrical portion by welding a plurality of members. Bonding structure. It is used for the joining structure of the frame member of any one of Claims 1-8.

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