Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
  • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
  • E04B1/19—Three-dimensional framework structures
  • E04B1/1903—Connecting nodes specially adapted therefor
  • E04B1/1912—Connecting nodes specially adapted therefor with central cubical connecting element
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
  • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
  • E04B1/19—Three-dimensional framework structures
  • E04B2001/1924—Struts specially adapted therefor
  • E04B2001/1927—Struts specially adapted therefor of essentially circular cross section
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
  • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
  • E04B1/19—Three-dimensional framework structures
  • E04B2001/1957—Details of connections between nodes and struts
  • E04B2001/196—Screw connections with axis parallel to the main axis of the strut
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T403/00—Joints and connections
  • Y10T403/34—Branched
  • Y10T403/341—Three or more radiating members
  • Y10T403/342—Polyhedral
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T403/00—Joints and connections
  • Y10T403/34—Branched
  • Y10T403/347—Polyhedral

Definitions

• the present invention relates to an apparatus for joining structural members for truss. Specifically, it is an apparatus that can easily and firmly connect a plurality of long structural members to a node. Background technology
• each structural member When constructing a three-dimensional truss structure using many long steel pipe structural members, the tip of each structural member is connected to a spherical node. In order to radially connect structural members to a node with several joining surfaces, a joining device with joining bolts is used. However, the joint bolt often cannot be screwed into the threaded hole in the node.
• the position of the two nodes for connecting the last structural member is determined. If the tip of the joining bolt is protruding from the joining device, it will not be possible to fit the structural member between the two fixed nodes.
• Structural members can be quickly connected to the nodes, and the structural members can be easily removed from the nodes;
• the joining device has a structure as simple as possible
• the present invention provides a joining bolt for connecting a structural member to a node, a sleeve for covering the joining bolt, transmitting rotation, and sliding the joining bolt toward the node, It is applied to a joining device having And the following means are provided.
• the joint bolt has a screw part that fits into the screw hole of the node and a square formed at the middle part of the joint bolt and having a diameter larger than the diameter of the screw part.
• a boss formed between the square boss and the bolt head and having a diameter smaller than the diameter of the square boss; and a top of each of the square bosses.
• a boss screw formed with the same pitch as the pitch of the screw portion.
• the edge cover at the end of the structural member has a hole having a diameter smaller than the diameter of the bolt head, a support portion having a length equal to or less than the length of the ⁇ portion, and a hole in the support portion. And a female screw portion formed to fit with the boss screw of the square boss portion.
• the sleeve is formed to be longer than the square boss portion, and has a square hole that contacts an axial slide of the square boss portion and a rotary hole formed on an outer surface of the sleeve. And a force acting portion.
• the sum of the length of the square boss portion and the length of the shaft portion is shorter than the sum of the length of the sleeve and the length of the support portion.
• the structural member and the joining device are connected even when the position of the two nodes for connecting the last structural member is determined by assembling the majority of the truss. It can be easily fitted between boards.
• the joining device is not damaged or excessive force is applied to the structural member and the joining device during the work of attaching and removing the structural member by rotating the joining bolt.
• the stress state as designed can be achieved.
• the joining bolt does not come into direct contact with the atmosphere, and a highly reliable joining device with reduced corrosion is provided. Also, the number of parts of the joining device is small, and the size can be reduced.
• FIG. 1 is a cross-sectional view of a structural member to which the joining device of the present invention is applied.
• FIG. 1 is a cross-sectional view of a structural member to which the joining device of the present invention is applied.
• FIG. 3 is a view taken in the direction of the arrows indicated by arrows 1 in FIG.
• FIG. 4 is a view taken along line IV-IV in FIG.
• FIG. 5 is an external view of a screw portion and a square boss portion of the joining bolt.
• Fig. 6 is a cross-sectional view when the tip of the screw part of the joint bolt is in the sleeve.
• FIG. 7 is a cross-sectional view when the joining bolt is moving forward in the node.
• FIG. 8 is a state diagram before connecting a structural member to a node.
• FIG. 9 is a sectional view for explaining the connection operation.
• FIG. 10 is a structural view of a structural member having a substantially conical cylindrical edge cover and a joint bolt having a round bolt head.
• FIG. 11 is a cross-sectional view of a prior art example having a spring for pressing a joint bolt.
• FIG. 1 is an overall sectional view of the joining device 30.
• Structural member 2 is a node
• a screw portion 6 a that fits into the screw hole 5 of the node 3 is formed.
• a square boss 7 having a diameter larger than the diameter of the thread 6 a is provided in the middle of the joint bolt 6.
• a shaft 6 m having a diameter smaller than the diameter of the square boss 7 is formed between the square boss 7 and the bolt head 6 b. Since it is not necessary to rotate the joint bolt 6 using the above-mentioned bolt head 6 b, the bolt head 6 b
• a boss screw 7 a is formed on each top of the above-mentioned square boss 7.
• the angular boss 7 contacts the inner surface of the sleeve 11 and cannot rotate independently.
• a female thread portion 32b is formed in the support portion 32 of the edge cover 2B.
• the diameter of the internal thread 32b is smaller than the diameter of the bolt head 6b.
• the boss screw 7a of the above-mentioned square boss portion 7 can also engage with the female screw portion 32b.
• the pitch P of the boss screw 7a is the same as the pitch p of the screw portion 6a, and the helical directions of the two are also the same. Therefore, as shown in FIG. 6, when the square boss 7 advances in the support portion 32, the screw portion 6a can also advance in the screw hole 5 of the node 3.
• the boss screw 7a has the same outer diameter as the diameter of a circumscribed circle 8A of a regular hexagonal square boss ⁇ .
• the bottom diameter of the boss screw 7a is the same as the diameter of the intermediate circle 8C between the circumscribed circle 8A and the inscribed circle 8B.
• the part shown in black is the boss screw 7a.
• a flat portion 7b of length L is secured between the boss screws 7a, 7a at the top of the square boss portion 7.
• the flat portion 7b comes into contact with each surface of the square hole 11a of the sleeve 11 shown in FIG.
• the square boss 7 rotates, and as shown in FIG. 7, the screw is formed in a state where the square boss 7 is engaged with the female thread 32 b. 6a can be engaged with the screw hole 5.
• the structural member 2 is composed of a main structural member 2A in which a long pipe is adopted, and an edge cover 2B for closing the end face. Before the thick edge cover 2B is welded to the end of the main structural member 2A, the joining bolt 6 is attached to the edge cover 2B.
• the edge cover 22B may be a cone like the edge cover 22B in FIG. If the outer surface of the edge bar 22B is hexagonal, when the sleeve 11 is rotated, a rotational reaction force can be applied to the outer surface 22a. It is extremely easy to apply a predetermined rotational force to the sleeve 1.
• the length of the support portion 32 shown in FIG. 1 is less than £ 2, the length of the shaft portion is 6 m.
• the diameter of the female screw portion 32 b formed on the inner surface of the member 32 is as described above. It is large enough to insert a 6 m long stalk. Therefore, the diameter of the shaft 6 m is the diameter of the inscribed circle 8 B shown in Fig. 2. It is as follows. (Refer to the dashed line 6 m in Fig. 5).
• a sleeve 11 that contacts the outer surface of the above-described square boss portion 7 and transmits the rotational force to the joint bolt 6 is employed.
• the sleeve 11 is provided with a square hole 11 a that enables the square boss 7 to slide in the axial direction.
• the length of the sleeve 11 is longer than the length of the square boss 7 of £ 3 . With the joint bolt 6 deeply in contact with the node 3, the bolt head 6b must hit the end face 32c of the support part 32. The sum of the length of the shaft 6 m and the length of the square boss 7 £ 2 + £ 3 is shorter than the sum of the length of the support 32 and the length of the sleeve 11 + ⁇ .
• the outer surface of the above-mentioned sleeve 11 has a rotating force acting portion 11A for rotating the angular boss 7.
• the square boss 7 and the sleeve 11 are usually hexagonal in cross section. Its section can be rotated with a spanner.
• the joining bolt 6 is inserted into the support portion 32 of the edge cover 2B having a predetermined length. Then, the boss screw 7a is engaged with the female screw portion 32b. Thereafter, the edge cover 2B is welded to both ends of the main structural member 2A having a predetermined length.
• the length L 3 of the structural member 2 supporting the edge covers 2 B at both ends shown in FIG. 1 must be accurate.
• the length L t and or falling edge of Jikaba 2 length L z of the B structure main member 2 A are given exactly I by the machining.
• Jikaba 2 B structure main member 2 A one or falling edge of Jikaba 2 other or falling edge of Jikaba 2 length L 3 at the end face or the B from the end face 2 n of B is Hei 1 one
• This is precisely achieved by the method proposed by the applicant in the Japanese Patent Application No. 121429. Since this welding method is not directly related to the present invention, its description is omitted.
• the sleeve 11 is put on the square boss 7 and The sleeve i1 is brought into contact with the end face 2n of the edge cover 2B as shown in FIG.
• the tip 6 n of the joint bolt 6 is inserted inside the end face 11 b of the sleeve 11.
• the joining bolt 6 is retracted to the structural member 2 side, and the joining device 30 and the structural member 2 are transported between the two nodes 3. ,
• the end face 11 b of the sleeve 11 comes into contact with the flat surface 3 a of the node 3.
• Structural member 2 with the correct length L 3. Because most of the truss is assembled, the structural member 2 remains connected to nodes 3 and 3 even if the position of the two nodes for connecting the last structural member is determined. It fits easily between.
• the sleeve 11 is rotated forward as indicated by the arrow 4 by using the rotating force acting portion 11 A formed on the outer surface of the sleeve 11. Since the flat portion 7b is in contact with the square hole 11a, the joining bolt 6 is rotated. As shown in FIG. 6, the screw portion 6 a of the joint bolt 6 does not engage with the screw hole 5. As shown in FIG. 3, the joint bolt 6 advances by the rotation of the boss screw 7a that engages with the ⁇ thread part 32b of the support part 32-the joint bolt 6 becomes a node. When moving to the third side, the square boss ⁇ slides in the square hole 11a. As shown in FIG. 7, the thread 6 a starts to enter the screw hole 5.
• the screw portion 6 a Since the pitch p of the screw portion 6 a is the same as the bit p of the boss screw 7 a, the screw portion 6 a mates with the screw hole 5 of the node 3. When the boss screw 7a comes off from the screw part 32b as shown at the two-point line, the screw part 6a is sufficiently engaged with the screw hole 5. The rotation of the screw portion 6 a engaged with the screw hole 5 advances the joint bolt 6 further into the node 3. When the screw portion 6a goes deeply into the screw hole 5, the bolt head 6b hits the end face 32c of the support portion 32 as shown in FIG. Join bolt 6 cannot advance any further.
• the joint bolt 6 is covered with the node 3, the sleeve 11, the edge cover 2B, and the main structural member 2A.
• the joint bolt 6 does not come into direct contact with the atmosphere, and the corrosion of the joint bolt 6 is suppressed.
• the sleeve 11 When the structural member 2 is incorrectly installed, the sleeve 11 is rotated in the opposite direction. The joining bolt 6 with the threaded portion 6a and the threaded hole 5 engaged is retracted. Before the screw portion 6a comes off the screw hole 5, the boss screw 7a engages with the female screw portion 32b of the support portion 32. After the screw portion 6a comes off the screw hole 5, the boss screw 7a and the 111 screw portion 3 2b engage with each other, so that the tip of the screw portion 6a securely enters the sleeve 11. Therefore, the structural member 2 between the two fixed nodes 3, 3 is very easily removed.
• the joining device is not damaged, and no excessive force acts on the structural member / joining bolt.
• the desired stress acting state as designed is realized, and the reliability of the structural member is improved.
• the joint bolt is completely covered with the sleeve, and corrosion of the joint bolt is suppressed.
• This joining apparatus does not include the spring 29, the support member 27, and the anchor nut 28 shown in FIG. 11, and has a small number of components. There is no need to secure a storage space for the spring 29, and the joining device is compact. Industrial availability
• This invention connects the structural members used to build one truss. It is used as a hand-held device. Even when the positions of the two nodes connecting the structural members are determined, the structural members can be reliably inserted between the nodes by using the present joining device.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Joining Of Building Structures In Genera (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=12440643

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (9)

Citations (3)

Family Cites Families (6)

• 1989
  • 1989-03-27 JP JP1989035392U patent/JPH0752243Y2/ja not_active Expired - Lifetime
• 1990
  • 1990-03-26 WO PCT/JP1990/000395 patent/WO1990011416A1/ja active Application Filing
  • 1990-03-26 US US07/601,782 patent/US5141351A/en not_active Expired - Lifetime
  • 1990-03-26 DE DE4090435A patent/DE4090435C1/de not_active Expired - Lifetime
  • 1990-11-12 GB GB9024586A patent/GB2243852B/en not_active Expired - Lifetime

Patent Citations (3)

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