JP2016014250A - Structural member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structural member having relatively small dimensions and weight, capable of preventing buckling with a simple structure, and suited for applications to bear a tensile force when in a standstill.SOLUTION: A structure member 1 comprises a linear core material 2, and a triangular pipe 3 that surrounds the core material 2. A clevis 4 is fixed on both ends of the structural member 1, for forming a tie-rod 10. The clevis 4 has a mouthpiece part engaged to a tip of the triangular pipe 3 and having the core material 2 fixed at a center, and a plate part 6 on which a pin hole 6a is formed for making a pin connection with an object. The structural member 1 is configured to bear only a tensile force when in a standstill, and a compression force of a certain level when exposed to a vibration or an impact caused by an earthquake, wind, a live load, etc.

Description

  The present invention relates to a structural member having a buckling resistance function.

  Conventionally, in a structure such as a building or a bridge, a buckling restraining material is used as a member on which a force in the compression direction acts. As a buckling restraint material, conventionally, both side surfaces of a strip-shaped core material are sandwiched between restraint materials made of channel steel, and the load is supported by the core material. Some are formed so as to restrain the bending (for example, see Patent Document 1). In the core material, a narrowed portion narrower than other portions is formed in the central portion in the longitudinal direction, and a slit extending in the longitudinal direction is formed in the narrowed portion. By means of the narrowed portion and the slit of the core material, the buckling mode at the time of buckling of the core material is dispersed, and the stiffening force that the restraint material should have is reduced.

  Moreover, as a conventional buckling restraint material, a hole is provided in a part of a brace formed of a steel pipe, and a cement-based material is injected from the hole to fill the inside of the steel pipe, and the cement-based material is solidified. There is a steel pipe brace formed so as to stiffen local buckling of a steel pipe with a cement-based solidified material (for example, Patent Document 2).

JP 2012-229572 A JP 2009-174173 A

  Tensile materials used for applications such as hanging a predetermined object of a structure or introducing tension to a predetermined object usually receive only a tensile force. Therefore, a member that does not substantially have a yield strength in the compression direction is used. It is common to use. Therefore, when an object vibrates due to an earthquake, wind, or the like, the tensile material may be easily buckled or bent due to a compressive force. Therefore, in order to prevent buckling of the tensile material, it is conceivable to apply a conventional buckling restraining material.

  However, the buckling restraint material described in Patent Document 1 is formed of a band-shaped core material having a narrowed portion and a slit and a restraint material that sandwiches the core material, so the shape of the component is complicated. In addition, since the number of parts is relatively large, there is a problem that the size and mass are likely to be large, and that the production is troublesome. Moreover, since the buckling restraint material of patent document 2 uses a cement-type solidified material, there exists a problem that mass becomes excessive and it is difficult to apply to a tension material.

  Accordingly, an object of the present invention is to propose a structural member that is relatively small in size and mass, can realize a buckling prevention function with a simple structure, and is suitable for applications that support a tensile force when stationary. is there.

In order to solve the above problems, the structural member of the present invention is
A linear core,
And a buckling-resistant material having a hollow triangular cross section surrounding the outside of the core material.

  According to the above configuration, the tensile force is supported by the linear core material, while the compressive force is supported by the buckling resistant material having a hollow triangular cross section surrounding the outer side of the core material. Moreover, the buckling of the said core material is restrained by the buckling-resistant material surrounding the outer side of the said core material. Therefore, a structural member capable of supporting a compressive force when an earthquake, a wind, a live load, etc. is applied, while supporting a tensile force when stationary by a relatively simple configuration using a core material and a buckling-resistant material, It can be configured with relatively small dimensions and mass. As a result, it is possible to prevent an inconvenience that an excessive displacement occurs in an object to be supported by the structural member when a compressive force is applied, such as a structural member that supports only the tensile force. Moreover, since the buckling-resistant material which has a hollow triangular cross section is used, compressive force can be supported, suppressing mass and a dimension, and durability with respect to buckling can be improved. In addition, since this structural member is formed by surrounding the outer side of the core material with a buckling-resistant material, the core material that functions as a tensile material mainly at rest is protected with the buckling-resistant material to enhance durability. Can do. Here, the core material is preferably formed of a metal having a relatively high tensile strength such as steel. The buckling-resistant material is preferably formed of a light metal having a specific gravity of 5 or less, such as aluminum, titanium, or duralumin, a resin, or the like for weight reduction.

The structural member of one embodiment includes a plurality of the above buckling resistant materials,
An exterior material that surrounds and integrates the outer periphery of the plurality of buckling-resistant materials.

  According to the above embodiment, the plurality of buckling resistant materials surrounding the core material are integrated with the outermost peripheral surface surrounded by the exterior material, so that the buckling resistance performance of the buckling resistant material is effectively improved. Moreover, the beauty of the structural member can be improved by the exterior material. Further, the exterior material can prevent the core material and the buckling resistant material from being rusted. Here, as the exterior material, a sheet or a mold formed of metal, resin, carbon fiber, or a composite material thereof can be used.

  In the structural member according to one embodiment, the plurality of buckling-resistant materials are formed such that side surfaces of adjacent buckling-resistant materials are in contact with each other, and these contacting side surfaces have a radial shape centering on the core material in a cross section perpendicular to the axis. It is arranged to make.

  According to the above embodiment, the plurality of buckling resistant materials can exhibit high buckling resistance performance because the side surfaces of the adjacent buckling resistant materials that are in contact with each other are arranged radially around the core material. In addition, an axially perpendicular cross section is a cross section that appears when an object is cut by a plane extending in a direction perpendicular to the central axis.

  In the structural member according to one embodiment, the plurality of buckling-resistant materials have the corners positioned on the outer peripheral side in the cross section perpendicular to the axis positioned on the same circumference.

  According to the above-described embodiment, the plurality of buckling-resistant materials are arranged so that the outer peripheral corners are positioned on the same circumference in the cross section perpendicular to the axis, so that they are substantially uniform at any position around the core material. The buckling resistance performance can be demonstrated. Moreover, since the ready-made mold | die material which has a circular cross section can be used as an exterior material surrounding the said some buckling-resistant material, the manufacturing cost of a structural member can be reduced effectively. Further, since the plurality of buckling-resistant materials having the same cross-sectional shape can be used, the structural member can be manufactured at low cost.

In the structural member of one embodiment, the plurality of buckling resistant materials have a right isosceles triangular shape in a cross section perpendicular to the axis,
The adjacent buckling-resistant materials are arranged so that the sides having the same length are in contact with each other in the cross-section perpendicular to the axis, and the cross-sections perpendicular to the axis of the plurality of buckling-resistant materials are formed to have a square outline. .

  According to the embodiment, a plurality of buckling-resistant materials having a right isosceles triangular cross section are arranged around the core so as to form a cross section of a square outline as a whole, thereby providing a highly versatile square cross section. The structural member is obtained. Moreover, since the ready-made mold | die material which has a square cross section can be used as an exterior material surrounding the said several buckling-resistant material, the manufacturing cost of a structural member can be reduced effectively.

  In the structural member of one embodiment, a filler is filled inside the buckling resistant material.

  According to the embodiment, the buckling resistance performance of the buckling resistant material can be improved by filling the inside of the buckling resistant material with the filler. Here, the filler may be either liquid or solid. As the liquid filler, water, oil, fluid resin, or the like can be used. Moreover, as a solid filler, what was formed with the metal or resin etc. is employable. In particular, as a solid filler, for example, a solidified resin, a foamable resin, or the like that has fluidity at the time of installation of the filler and is solidified after installation can be used to easily perform the filling operation. be able to. Further, as the solid filler, a hollow three-dimensional structure such as a honeycomb formed of metal or resin may be used.

The structural member of one embodiment is formed inside the buckling-resistant material, the cylinder through which the core material can be driven in the axial direction,
A piston that is fixed to the core and divides the inside of the cylinder into two chambers filled with the filler as working fluid;
One end of the core material and the other end of the cylinder are formed so as to be capable of relative displacement in the axial direction by receiving a tensile force or a compressive force, and when the other end side of the core material has a maximum displacement, A structural member, wherein the structural member engages with the other end side of the cylinder, and is formed so that one end side of the cylinder is locked to one end side of the core member when the minimum displacement is achieved.

  According to the above embodiment, when a tensile force or a compressive force is applied between one end of the core material and the other end of the cylinder, the piston fixed to the core material receives the resistance force from the working fluid in the cylinder, and the cylinder Move in. When one end of the core material and the other end of the cylinder make a maximum relative displacement, the other end side of the core material engages with the other end side of the cylinder, and a tensile force is transmitted through the core material and the cylinder. On the other hand, when one end of the core material and the other end of the cylinder make a minimum relative displacement, one end side of the cylinder is locked to one end side of the core material, and a compressive force is transmitted through the core material and the cylinder. As described above, the tensile force and the compressive force are transmitted between one end of the core material and the other end of the cylinder, and the operation is performed when the one end of the core material and the other end of the cylinder are relatively displaced. A buffering action can be achieved by the resistance force received from the fluid. Therefore, the object to which the structural member is applied can be supported while suppressing impacts and vibrations caused by, for example, earthquakes, winds, and live loads. In addition, the said cylinder may be formed in the hollow part of the said buckling-resistant material, or may be formed by other members, such as a cylindrical member arrange | positioned in the hollow part of the said buckling-resistant material. .

  The structural member of one embodiment is provided with a fluid passage through which the working fluid flows between the two chambers in the piston.

  According to the above-described embodiment, when the piston is driven, the working fluid flows through the fluid passage, so that the resisting force according to the size, shape, etc. of the fluid passage is applied to the piston and a predetermined buffering effect is achieved. Can do.

  In the structural member of one embodiment, the fluid passage of the piston is formed such that different resistance force is generated according to the direction in which the working fluid flows.

  According to the above-described embodiment, a different resistance force is generated by changing the direction in which the working fluid flows through the fluid passage in accordance with the driving direction of the piston. As a result, when one end of the core and the other end of the cylinder make a relative displacement in the approaching direction and when making a relative displacement in the separation direction, the resistance force acting on the piston is made different, and the buffering action is made. Can be different. Therefore, an appropriate buffering action can be given to the object according to the load state acting on the object, the shape of the object, and the like.

It is a perspective view which shows the structural member of 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the tie rod using the structural member of 1st Embodiment. It is a figure which shows a mode that the tie rod was used for the structure. It is a perspective view which shows the structural member of 2nd Embodiment. It is a longitudinal cross-sectional view which shows the tie rod using the structural member of 2nd Embodiment. It is a perspective view which shows the structural member of 3rd Embodiment. It is a longitudinal cross-sectional view which shows the tie rod using the structural member of 3rd Embodiment. It is a longitudinal cross-sectional view which shows the structural member of 4th Embodiment, and a tie rod using the same. It is a longitudinal cross-sectional view which shows the operating state of the tie rod of 4th Embodiment. It is a longitudinal cross-sectional view which shows the piston of the tie rod of 4th Embodiment. It is a longitudinal cross-sectional view which shows the operating condition of the piston of FIG. It is a longitudinal cross-sectional view which shows the operating condition of the piston of FIG.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a perspective view showing a structural member according to a first embodiment of the present invention. The structural member 1 mainly supports a tensile force, and is preferably used in a place where a certain proof stress is required even for a compressive force. For example, the structural member 1 is used for hanging a predetermined target of a structure. It can be used for applications such as introducing tension to a predetermined target. The structural member 1 is formed of a linear core material 2 and a triangular tube 3 as a buckling-resistant material surrounding the core material 2.

  The core material 2 is a steel wire made of plain steel, and is made of a material having a thickness and a material corresponding to the magnitude of the tensile force to be supported. In addition, the steel wire produced with high-tensile steel etc. other than ordinary steel may be sufficient, and the core material 2 may be formed with a piano wire or a twisted wire. As the stranded wire, one made of metal fiber such as steel, resin fiber such as aramid, carbon fiber, or the like can be used.

  The triangular tube 3 is a hollow steel tube having an equilateral triangular cross section, and is manufactured with a size and material corresponding to the magnitude of the compressive force. The material of the triangular tube 3 can employ steel, metals such as aluminum, titanium and duralumin, and resins such as PPS (polyphenylene sulfide) and PEEK (polyether ether ketone). Various materials such as alloy steel, stainless steel, and carbon steel can be adopted as the steel. Here, the triangular tube 3 is preferably formed of a light metal having a specific gravity of 5 or less, such as resin, aluminum, titanium, duralumin, or the like, for weight reduction.

  The inside of the triangular tube 3 may remain hollow, and a filler may be filled between the core material 2 and the triangular tube 3. By filling the triangular tube 3 with a filler, the buckling resistance of the triangular tube 3 can be improved. As the filler, either liquid or solid may be adopted. As the liquid filler, water, oil, or fluid resin can be used. As the solid filler, those formed of metal or resin can be employed. Further, for example, by using a material that has fluidity when the filler is installed and solidifies after the installation, such as a solidified resin and a foamable resin, the filling operation can be easily performed. Further, as the solid filler, a hollow three-dimensional structure such as a honeycomb formed of metal or resin may be used.

  FIG. 2 is a longitudinal sectional view showing a tie rod 10 using the structural member 1 of the first embodiment. The tie rod 10 mainly supports a tensile force, but also has a certain proof strength against a compressive force. That is, the tie rod 10 is formed so as to withstand a certain compressive force when it receives vibration or impact due to an earthquake, a wind, a live load or the like while supporting only a tension when stationary.

  The tie rod 10 includes the structural member 1 according to the first embodiment and clevises 4 fixed to both ends of the structural member 1.

  The clevis 4 is formed so as to transmit a tensile force to the core member 2 of the structural member 1 while transmitting a compressive force to the triangular tube 3. The clevis 4 is fitted to an end portion of a triangular tube 3 as a buckling resistant material, and a base portion 5 in which the core material 2 is fixed at the center, and the core material 2 and the triangular tube 3 of the base portion 5 are fixed. And a plate portion 6 provided on the opposite side.

  The base portion 5 of the clevis 4 is formed from the edge 5a formed at the center of the end surface 5a with the end surface 5a with which the tip of the triangular tube 3 contacts, and the edge of the end surface 5a. It has the wall part 5c extended in an axial direction. Both end portions 2a of the core member 2 screwed into the spiral hole 5a of the base portion 5 are provided with male screws that are wound opposite to each other. In the spiral hole 5 b of the base portion 5, female screws that are wound in opposite directions between the two clevises 4 are provided corresponding to the male screws of the core member 2. The triangular tube 3 is arranged so as to surround the core material 2, and the core material 2 is rotated by screwing the spiral holes 5 a of the two cap portions 5 into the male screws at both ends 2 a of the core material 2. Thus, a pressing force in a direction close to each other is applied to these cap portions 5 and 5. With this pressing force, the cap portion 5 of the clevis 4 is pressed against both ends of the triangular tube 3 to fix the clevis 4 to the structural member 1. When the clevis 4 is fixed to the structural member 1, the wall portion 5 c of the cap portion 5 of the clevis 4 is fitted so as to surround the end portion of the triangular tube 3.

  The base portion 5 and the core material 2 of the clevis 4 are fixed with a nut that is formed in the base portion 5 with a through hole of the core material 2 and screwed to the tip of the core material 2 inserted into the through hole. May be. That is, a through-hole is provided in the center of the cap portion 5 of the clevis 4, and the tip end portion of the core member 2 is inserted into the through-hole so as to protrude toward the plate portion 6 side of the cap portion 5. The clevis 4 may be fixed to the core member 2 by screwing a nut into the male screw at the tip of the core member 2 and pressing the end surface of the base portion 5 on the plate portion 6 side with this nut. Further, both the male screw at both end portions 2 a of the core member 2 and the female screw of the spiral hole 5 b of the base portion 5 of the two clevises 4 are formed in a forward direction winding, and the clevis with respect to the core member 2 is formed. The male caps 5 of the core member 2 and the female screws of the cap unit 5 may be screwed together by rotating the four cap units 5 in the same direction.

  The plate part 6 of the clevis 4 is formed of a plate-like body extending in the center of the end face of the base part 5 on the extensibility of the core member 2. An insertion hole 6 a through which a pin for pin connection to the tie rod 10 is inserted is provided on the tip side of the plate portion 6. Note that the plate portion may be formed of two plate-like bodies that are formed on the end face of the base portion 5 at a radial interval and sandwich a gusset plate or the like.

  As shown in FIG. 3, the tie rod 10 using the structural member 1 of the first embodiment can be used to suspend the rod 11 as the object of the structure. The eaves 11 are installed on the wall 12 of the structure so as to protrude in the horizontal direction perpendicular to the surface of the wall 12. A tie rod 10 is bridged between a suspension plate 14 provided on the surface of the wall body 12 and a support plate 13 provided at a tip portion of the flange 11. The wall surface of the wall body 12, the flange 11, and the tie rod 10 form a substantially right triangle. The clevises 4 at both ends of the tie rod 10 are pin-connected to the suspension plate 14 and the support plate 13 respectively.

  The tie rod 10 using the structural member 1 of the first embodiment supports the core member 2 with a tensile force for resisting the gravity acting on the flange 11 when the flange 11 is stationary. On the other hand, when an upward force is applied to the kite 11 due to an earthquake or wind, a compressive force is applied to the tie rod 10. Here, the core material 2 of the tie rod 10 hardly supports the compressive force, but can support the compressive force by the triangular tube 3. Therefore, it is possible to effectively prevent inconvenience that the rod 11 is excessively displaced by the upward force and inconvenience that vibration occurs. Further, according to the present embodiment, a relatively simple configuration using the core material 2 and the triangular tube 3 supports a tensile force when stationary, while a compressive force is applied when an earthquake, wind, live load, or the like is applied. The structural member 1 that can be supported can be configured with relatively small dimensions and mass.

  FIG. 4 is a perspective view showing the structural member of the second embodiment. This structural member 21 is different from the first embodiment in that the number and arrangement of the buckling resistant materials and the exterior material are provided. In the second embodiment, the same parts as those in the first embodiment are referred to by the same reference numerals, and detailed description thereof is omitted.

  In the structural member 21 of the second embodiment, six triangular tubes 3 as a plurality of buckling-resistant materials are arranged around the core material 2, and these six triangular tubes 3 are surrounded by an exterior material 7. It is integrated with. The six triangular tubes 3 have the same size and shape. The six triangular tubes 3 are arranged at rotationally symmetric positions around the core member 2 at the apex of the core member 2 in the cross section perpendicular to the axis. The side surfaces of the plurality of triangular tubes 3 that are in contact with each other have a radial shape centered on the core member 2 in a cross section perpendicular to the axis. Thereby, the side surface located in the outer peripheral side of the six triangular tubes 3 has a regular hexagonal outline in the cross section perpendicular to the axis.

  The exterior material 7 is formed of a steel pipe having a circular cross section, and is externally fitted to these six triangular tubes 3 so that the inner surface is in contact with the outer peripheral edge of the six triangular tubes 3. As the material of the exterior member 7, a metal such as aluminum, titanium, and duralumin, or a resin such as PPS and PEEK can be used in addition to steel. Various materials such as alloy steel, stainless steel, and carbon steel can be adopted as the steel. Here, the exterior material 7 is preferably formed of a light metal having a specific gravity of 5 or less, such as resin, aluminum, titanium, duralumin, or the like, for weight reduction. The shape of the exterior material 7 may be a regular hexagon that is substantially in close contact with the six triangular tubes 3. The exterior material 7 may be formed by winding a sheet of metal, resin, or carbon fiber around the outer peripheral surfaces of the six triangular tubes 3.

  FIG. 5 is a longitudinal section of a tie rod 210 formed using the structural member 21 of the second embodiment. In the tie rod 210, clevises 24 and 24 fixed to both ends of the structural member 21 transmit tensile force to the core material 2 and compressive force to the triangular tube 3, while It is formed so as not to transmit tensile force and compressive force.

  The base portion 25 of the clevis 24 has a spiral hole 25b formed in the center of the end surface 25a, and a wall portion extending in the axial direction from the edge of the end surface 25a. 25c. The end portion 2a of the core member 2 is screwed into the central spiral hole 25b and the end surface of the six triangular tubes 3, 3,... Are in contact. The end portions of these six triangular tubes 3, 3,. Both end portions 2a of the core member 2 that are screwed into the spiral hole 25b of the base portion 25 are provided with male screws that are wound in the forward direction. In the state where the six triangular tubes 3, 3,... Are arranged, the spiral holes 25b of the base part 25 are screwed to both end parts 2a of the core material 2, and the clevis 24 is rotated to the core material 2. By screwing, the clevis 24 can be fixed to both ends of the core member 2 and the triangular tubes 3, 3,. In this case, since the clevis 24 can be rotated until the end face 25a of the base portion 25 comes into contact with the end face of the triangular tube 3, the wall portion 25c of the base portion 25 has six triangular tubes 3, 3, Are formed so as to form a circle inscribed in the corners on the outer peripheral side.

  The base portion 25 of the clevis 24 and the core member 2 may be fixed with a nut that is formed with a through hole in the base portion 25 and screwed into the tip end portion of the core member 2 inserted through the through hole. That is, a through hole is provided in the center of the base portion 25 of the clevis 24, and the tip end portion of the core member 2 is inserted into the through hole so as to protrude toward the plate portion 6 side of the base portion 25. The clevis 24 may be fixed to the core member 2 by screwing a nut into the male screw at the tip of the core member 2 and pressing the end surface of the base portion 25 on the plate portion 6 side with this nut. In this case, since there is no need to rotate the clevis 24, the wall portion 25c of the base portion 25 is formed in a hexagonal shape inscribed in the outer peripheral edges of the six triangular tubes 3, 3,. be able to.

  The wall portion 25c of the clevis 24 is set so that the end surface of the wall portion 25c has an axial length that places a gap with respect to the end surface of the exterior material 7, and thereby the exterior material 7 receives a tensile force and a compressive force. It is formed so that there is no. When the compressive force is applied to the six triangular tubes 3, 3,..., The exterior material 7 secures the strength in the circumferential direction without receiving the tensile force and the compressive force. It is designed to exert buckling resistance ability by restraining the movement in the direction perpendicular to the axis.

  According to the tie rod 210 formed using the structural member 21 of the second embodiment, since the triangular tube 3 as a plurality of buckling-resistant materials and the exterior material 7 surrounding these triangular tubes 3 are provided, high compression strength is provided. And has buckling resistance ability. Therefore, the tie rod 210 can be used in a place where the tensile force mainly acts and the compression force acts frequently. Further, since the six triangular tubes 3 are arranged so that the outer peripheral corners are located on the same circumference in the cross section perpendicular to the axis, the tie rod 210 is substantially uniform at any position around the core material 2. The buckling resistance performance can be demonstrated. Moreover, since the ready-made mold | die material which has a circular cross section can be used as the exterior material 7, the manufacturing cost of the structural member 21 and the tie rod 210 can be reduced effectively. Further, the exterior material 7 can improve the appearance of the structural member 21. Further, the exterior material 7 can prevent the core material 2 and the triangular tube 3 from being rusted.

  FIG. 6 is a perspective view showing the structural member of the third embodiment. This structural member 31 is different from the second embodiment in the shape, number and arrangement of buckling-resistant materials and the shape of the exterior material. In the third embodiment, the same parts as those in the second embodiment are referred to by the same reference numerals, and detailed description thereof is omitted.

  In the structural member 31 of the third embodiment, a triangular tube 33 having eight right-angled triangular cross-sections as a plurality of buckling-resistant materials is arranged around the core material 2, and these triangular tubes 33 are arranged in a square cross-section. The outer packaging material 37 surrounds and is integrated. The eight triangular tubes 33 have the same size and shape. The eight triangular tubes 33 are arranged around the core member 2 so that the apex is in contact with the core member 2 and the adjacent triangular tubes 33 are in contact with the sides having the same length in the cross section perpendicular to the axis. Thereby, the side surface located in the outer peripheral side of the eight triangular tubes 33 has a square outline in the cross section perpendicular to the axis.

  The exterior material 7 is formed of a steel pipe having a square cross section, and is externally fitted to these eight triangular tubes 33 so that the inner surface is in contact with the outer peripheral side surfaces of the eight triangular tubes 33. In addition, the material of the exterior material 7 may employ a metal such as aluminum, titanium and duralumin, or a resin such as PPS or PEEK in addition to steel. Examples of the steel include alloy steel, stainless steel and carbon steel. Various materials can be used. Here, the exterior material 7 is preferably formed of a light metal having a specific gravity of 5 or less, such as resin, aluminum, titanium, duralumin, or the like, for weight reduction. The exterior material 7 may be formed by winding a sheet of metal, resin, or carbon fiber around the outer peripheral surfaces of the eight triangular tubes 33.

  The inside of the triangular tube 33 may remain hollow or may be filled with a filler. With the filler disposed inside the triangular tube 33, the buckling resistance of the triangular tube 33 can be improved. As the filler, for example, a liquid material formed of water, oil, fluid resin, or the like, or a solid material formed of metal, resin, or the like can be used. In particular, it is preferable from the viewpoint of facilitating the filling operation to have a fluidity when the filler is installed and solidify after the installation, such as a solidified resin and a foamable resin. Further, as the solid filler, a hollow three-dimensional structure such as a honeycomb formed of metal or resin may be used.

  FIG. 7 is a longitudinal section of a tie rod 310 formed using the structural member 31 of the third embodiment. In the tie rod 310, clevises 34 and 34 fixed to both ends of the structural member 31 transmit a tensile force to the core member 2 and a compressive force to the triangular tube 33, while the exterior member 37 substantially has a tie rod 310. It is formed so as not to transmit tensile force and compressive force.

  The base portion 35 of the clevis 34 has a spiral hole 35b formed in the center of the end surface 35a, and a wall portion extending in the axial direction from the edge of the end surface 35a. 35c. The end portion 2a of the core member 2 is screwed into the central spiral hole 35b and the end surface of the eight triangular tubes 33, 33,... Are in contact. The end portions of these eight triangular tubes 33, 33,... Are fitted and surrounded by a wall portion 35c. Both end portions 2a of the core member 2 that are screwed into the spiral hole 35b of the base portion 35 are provided with forwardly wound male screws. In the state where eight triangular tubes 33, 33,... Are arranged, the spiral hole 35b of the base part 35 is screwed into both ends 2a of the core member 2, and the clevis 34 is rotated to be attached to the core member 2. By screwing, the clevis 34 can be fixed to both ends of the core member 2 and the triangular tubes 33, 33,. In this case, since the clevis 34 can be rotated until the end face 35a of the base portion 35 contacts the end face of the triangular tube 33, the wall portion 35c of the base portion 35 has eight triangular tubes 33, 33, Are formed so as to form a circle inscribed in the corners on the outer peripheral side.

  The base part 35 of the clevis 34 and the core member 2 may be fixed with a nut that is formed with a through hole in the base part 35 and screwed into the tip of the core member 2 inserted through the through hole. That is, a through hole is provided in the center of the base portion 35 of the clevis 34, and the tip end portion of the core member 2 is inserted into the through hole so as to protrude toward the plate portion 6 side of the base portion 35. The clevis 34 may be fixed to the core material 2 by screwing a nut into the male screw at the tip of the core material 2 and pressing the end surface of the base part 35 on the plate part 6 side with this nut. In this case, since there is no need to rotate the clevis 34, the wall portion 35c of the base portion 35 is formed in an octagon inscribed in the outer peripheral edges of the eight triangular tubes 33, 33,. be able to.

  The wall portion 35c of the clevis 34 is set so that the end surface of the wall portion 35c has an axial length that places a gap with respect to the end surface of the exterior member 37, whereby the exterior member 37 receives a tensile force and a compressive force. It is formed so that there is no. When the compressive force is applied to the eight triangular tubes 33, 33,..., The exterior member 37 secures the strength in the circumferential direction without receiving the tensile force and the compressive force, so that the triangular tubes 33, 33,. It is designed to exert buckling resistance ability by restraining the movement in the direction perpendicular to the axis.

  According to the tie rod 310 formed using the structural member 31 of the third embodiment, since the triangular tube 33 as a plurality of buckling-resistant materials and the exterior material 37 surrounding these triangular tubes 33 are provided, high compression strength is provided. And has buckling resistance ability. Therefore, the tie rod 310 can be used in a place where the tensile force mainly acts and the compression force acts frequently. In addition, since the tie rod 310 has a square cross section, it can be easily applied to a structure and has high versatility. Moreover, since the ready-made mold | die material which has a square cross section can be used as the exterior material 37, the manufacturing cost of the structural member 31 and the tie rod 310 can be reduced effectively.

  FIG. 8 is a longitudinal sectional view showing the structural member of the fourth embodiment and a tie rod using the structural member. The structural member 41 of the fourth embodiment mainly supports a tensile force, while having a certain proof strength against a compressive force, and also exhibits a buffering function when either the tensile force or the compressive force is applied. Is. In the fourth embodiment, the same parts as those in the first embodiment are referred to by the same reference numerals, and detailed description thereof is omitted.

  The structural member 41 of the fourth embodiment is fixed in the middle of a triangular tube 43 as a buckling-resistant material having a regular triangular cross section, a core member 42 disposed at the center of the triangular tube 43, and the core member 42. The piston 45 is provided. A first clevis 51 is connected to one end of the structural member 41, and a second clevis 52 is connected to the other end of the structural member 41 to constitute a tie rod 410 with a buffer function as shown in FIG. FIG. 8 shows a state in which the tie rod 410 transmits a tensile force between the first clevis 51 and the second clevis 52, and FIG. 9 shows the tie rod 410 in the first clevis 51 and the second clevis 52. The mode at the time of transmitting compressive force between is shown.

  The triangular tube 43 serving as a buckling-resistant material is closed at both ends in the axial direction to form a cylinder. In this cylinder, a damper oil as a working fluid is sealed and a core material 42 is sealed. The piston 45 fixed to is accommodated so as to be axially drivable. One end of the triangular tube 43 is closed by a closing wall 44 and is accommodated inside the first clevis 51 so as to be movable in the axial direction. In the center of the closing wall 44, an insertion hole 44a is formed through which the core member 42 is inserted so as to be movable in the axial direction. A sealing member such as an O-ring (not shown) is provided in the insertion hole 44a in order to seal the gap with the core member 42. The other end of the triangular tube 43 is fixed to the second clevis 52 so as not to move and is closed. An insertion hole 54b through which the distal end portion of the core member 42 is movably inserted is formed in the end surface 54a of the second clevis 52, which is a closed surface at the other end of the triangular tube 43. A sealing member such as an O-ring (not shown) is provided in the insertion hole 54a in order to seal the gap with the core member 42. The other end of the triangular tube 43 may be closed with a closing wall and fixed to the second clevis 52 so as not to move. In this case, an insertion hole is formed in the closed wall, and the core member 42 is movably inserted. Similar to the first embodiment, the triangular tube 43 of the present embodiment can be made of various materials such as metal and resin.

  The core member 42 passes through a cylinder formed by the triangular tube 43 and is formed so as to be relatively displaceable in the axial direction with respect to the triangular tube 43. One end side of the core member 42 protrudes from the insertion hole 44 a of the closing wall 44 that closes one end of the triangular tube 43, and the tip is fixed to the first clevis 51. Specifically, the male spiral formed on the one end portion 42 a of the core member 42 is screwed into the spiral hole 53 b of the base portion 53 of the first clevis 51, whereby one end of the core member 42 is fixed to the first clevis 51. ing. On the other hand, the other end side of the core member 42 is inserted into an insertion hole 54 b on the end face of the second clevis 52 that closes the other end of the triangular tube 43. The insertion hole 54b of the second clevis 52 is connected to a hollow engagement chamber 54c formed in the second clevis 52 and having a diameter larger than that of the insertion hole 54b. The engagement moves to move in the engagement chamber 54c. The other end of the core member 42 is connected to the tool 42b. The engaging member 42b connected to the core member 42 is formed in the engagement chamber 54c as the core member 42 fixed to the first clevis 51 and the triangular tube 43 fixed to the second clevis 52 relatively move. Is moved in the axial direction. A piston 45 arranged in a cylinder in the triangular tube 43 is fixed at a predetermined position in the axial direction of the core member 42. The core material 42 of the present embodiment can be made of various materials such as metal and resin, but is preferably made of a material and dimensions that exhibit a certain rigidity so that the piston 45 can be driven back and forth.

  The piston 45 has a triangular prism shape, is fixed to the core member 42, is fitted inside the triangular tube 43, and is formed so as to be able to be driven in the axial direction together with the core member 42. The inside of the triangular tube 43 is partitioned by the piston 45 into a first chamber 46a on one end side filled with damper oil and a second chamber 46b on the other end side filled with damper oil. As shown in FIG. 10, a large-diameter first orifice 451 for allowing damper oil to flow between the first chamber 46a and the second chamber 46b and a small-diameter second orifice 452 are formed in the piston 45. Yes. A first valve body 453 that opens and closes the outlet of the first orifice 451 is provided on the end surface of the piston 45 on the first chamber 46a side. The first valve body 453 is formed of a leaf spring, and is formed so that the opening degree changes according to the flow velocity of the damper oil flowing through the first orifice 451. A second valve body 454 that opens and closes the outlet of the second orifice 452 is provided on the end surface of the piston 45 on the second chamber 46b side. The second valve body 454 is formed by a leaf spring, and is formed so that the opening degree changes according to the flow velocity of the damper oil flowing through the second orifice 452.

  One end of the structural member 41 having the above-described configuration is accommodated such that one end of the core member 42 is fixed to the first clevis 51 while one end of the triangular tube 43 is movable in the axial direction. The first clevis 51 includes a base part 53 in which the core member 42 is fixed at the center and one end of the triangular tube 43 is movably fitted in the axial direction, and the side of the base part 53 to which the core member 42 is fixed. And a plate portion 6 provided on the opposite side.

  The base portion 53 of the first clevis 51 has an end surface 53a where one end surface of the triangular tube 43 contacts and separates, and a female spiral which is provided in the center of the end surface 53a and engages with a male screw at one end portion 42a of the core member 42. It has a spiral hole 53b formed and a wall 53c extending in the axial direction from the edge of the end face 53a. The wall portion 53 c of the base portion 53 is formed so as to always accommodate one end portion of the triangular tube 43 that moves in the axial direction with respect to the first clevis 51 in the moving process of the triangular tube 43. In other words, the axial length of the wall portion 53 c is formed to be longer than the maximum relative displacement formed by the first clevis 51 and the triangular tube 43.

  The other end of the structural member 41 having the above configuration is accommodated so that the other end of the triangular tube 43 is fixed to the second clevis 52, while the other end of the core member 42 is movable and engageable in the axial direction. ing. The second clevis 52 has an insertion hole 54b through which the core member 42 is inserted at the center, a base portion 54 that fixes the other end of the triangular tube 43, and a side of the base portion 54 to which the triangular tube 43 is fixed. And a plate portion 6 provided on the opposite side.

  The base 54 of the second clevis 52 forms a wall surface at the other end of the triangular tube 43 and has an end surface 54a through which the other end of the core member 42 is inserted, and an end surface 54a provided at the center, and the insertion hole 54b. It has an engagement chamber 54c that communicates and has a diameter larger than that of the insertion hole 54b, and a wall portion 54d that extends in the axial direction from the edge of the end surface 54a. The wall portion 54d of the base portion 54 surrounds the other end portion of the triangular tube 43 and is fixed in a liquid-tight manner. The engagement chamber 54c is a member connected to the other end of the core member 42 in the process of relative movement between the core member 42 fixed to the first clevis 51 and the triangular tube 43 fixed to the second clevis 52. The fitting 42b is accommodated so as to be movable in the axial direction.

  In the tie rod 410 having the above-described configuration, when a tensile force is applied between the first clevis 51 and the second clevis 52, one end of the core member 42 and the other end of the triangular tube 43 are separated from each other to form a maximum relative displacement. As shown in FIG. 8, the engaging tool 42 b at the other end of the core member 42 engages with the wall surface on the one end side of the engaging chamber 54 c of the second clevis 52. That is, the other end of the core member 42 is engaged with the other end side of the cylinder. Thereby, a tensile force is transmitted between the first clevis 51 and the second clevis 52 via the core member 42, the engagement tool 42 b and the engagement chamber 54.

  On the other hand, when a compressive force is applied between the first clevis 51 and the second clevis 52, one end of the core member 42 and the other end of the triangular tube 43 come close to each other to form a minimum relative displacement, as shown in FIG. As described above, one end surface of the triangular tube 43 abuts on the end surface 53 a of the base portion 53 of the first clevis 51. That is, one end side of the cylinder is locked to one end side of the core member 42. Thereby, a compressive force is transmitted between the first clevis 51 and the second clevis 52 via the triangular tube 43 and the end face 53a.

  In the process of transmitting a tensile force between the first clevis 51 and the second clevis 52, the piston 45 fixed to the core member 42 as one end of the core member 42 and the other end of the triangular tube 43 are separated from each other. However, as indicated by an arrow A in FIG. 11, it relatively moves in a direction approaching one end of the triangular tube 43. As a result, the first chamber 46a defined by the piston 45 contracts and the second chamber 46b expands, and the damper oil in the first chamber 46a flows into the second chamber 46b through the second orifice 452. Due to the fluid force of the damper oil flowing through the second orifice 452, a resistance force opposite to the moving direction acts on the piston 45, and the movement between the piston 45 and the core member 42 and the triangular tube 43 is buffered. As a result, the operation of separating the first clevis 51 and the second clevis 52 is buffered. At this time, the opening degree of the second valve body 454 of the second orifice 452 becomes an opening degree corresponding to the flow velocity, and the piston 45 according to the degree of impact of the tensile force acting on the first clevis 51 and the second clevis 52. The resistance force acting on is adjusted.

  On the other hand, in the process of transmitting the compressive force between the first clevis 51 and the second clevis 52, the one end of the core member 42 and the other end of the triangular tube 43 are fixed to the core member 42 as they approach each other. The piston 45 relatively moves in a direction approaching the other end of the triangular tube 43 as indicated by an arrow B in FIG. As a result, the first chamber 46a defined by the piston 45 expands and the second chamber 46b contracts, and the damper oil in the second chamber 46b flows into the first chamber 46a through the first orifice 451. Due to the fluid force of the damper oil flowing through the first orifice 451, a resistance force opposite to the moving direction acts on the piston 45, and the movement between the piston 45 and the core member 42 and the triangular tube 43 is buffered. As a result, the operation in which the first clevis 51 and the second clevis 52 approach is buffered. At this time, the opening degree of the first valve body 453 of the first orifice 451 becomes an opening degree corresponding to the flow velocity, and the piston 45 according to the degree of impact of the compressive force acting on the first clevis 51 and the second clevis 52. The resistance force acting on is adjusted.

  Since the diameter of the second orifice 452 is smaller than the diameter of the first orifice 451, the resistance force of the piston 45 is greater when a tensile force is applied to the first clevis 51 and the second clevis 52. , Greater than when applying compressive force. Thus, the buffering action against the tensile force is set larger than the buffering action against the compressive force. In this way, it is possible to obtain a buffer function corresponding to the load state acting on the object, the installation status of the object, and the like. The diameter of the first orifice 451 is made smaller than the diameter of the second orifice 452, and the buffering action when applying a compressive force to the first clevis 51 and the second clevis 52 is the buffering action when applying the tensile force. You may set larger than an effect | action. Further, the diameter of the first orifice 451 may be formed to be the same as the diameter of the second orifice 452, and the buffering action for the compression force and the buffering action for the tensile force may be set to be the same.

  According to the tie rod 410 with a buffer function of the present embodiment, when an object supported by the tie rod 410 receives an earthquake, wind, or live load, it is possible to effectively suppress the impact and vibration applied to the object. Moreover, when a compressive force acts between the 1st clevis 51 and the 2nd clevis 52, the compressive force which acts on the triangular tube 43 which is a buckling-resistant material can be buffered effectively, and buckling prevention can be performed. .

  In the above embodiment, the triangular tube 43 serving as a buckling-resistant material is closed at both ends to form a cylinder, and a triangular pillar-shaped piston 45 is accommodated in the cylinder to constitute the buffering tie rod 410. A cylindrical cylinder may be provided inside the bending material, and a cylindrical piston may be accommodated in the cylinder to constitute a tie rod with a buffer function. The cylindrical cylinder may be provided by forming the inner surface of the buckling resistant material into a cylindrical shape, or may be provided by accommodating a cylindrical member inside the buckling resistant material.

  In each of the above embodiments, the tie rods 10, 210, 310, 410 are configured by fixing the clevis 4, 24, 34, 51, 52 to both ends of the structural members 1, 21, 31, 41, but the structural member 1 21, 31, 41 may be connected to a connector having a base and a flange having a rivet insertion hole at both ends to constitute a tie rod fixed to the object with a rivet.

1,21,31,41 Structural member 2,42 Core 3,33,43 Triangular tube 4,24,34,51,52 Clevis 5,25,35,53,54 Clevis base 6 Clevis plate 7, 37 Exterior material 10, 210, 310, 410 Tie rod 45 Piston 451 Piston first orifice 452 Piston second orifice 453 Piston first valve body 454 Piston second valve body

Claims (9)

A linear core,
A structural member comprising: a buckling-resistant material having a hollow triangular cross-section surrounding the core material. The structural member according to claim 1,
A plurality of the above buckling resistant materials,
A structural member comprising an exterior material surrounding and integrating the outer periphery of the plurality of buckling-resistant materials. The structural member according to claim 2,
The plurality of buckling-resistant materials are arranged such that side surfaces of adjacent buckling-resistant materials are in contact with each other, and these contacting side surfaces are arranged so as to have a radial shape centering on the core material in a cross section perpendicular to the axis. Structural member characterized. The structural member according to claim 3,
The structural member characterized in that the plurality of buckling-resistant materials have corners located on the outer circumference side in a cross section perpendicular to the axis located on the same circumference. The structural member according to claim 3,
The plurality of buckling-resistant materials have a right-angled isosceles triangle shape in a cross section perpendicular to the axis,
The adjacent buckling-resistant materials are arranged so that the sides having the same length are in contact with each other in the cross-section perpendicular to the axis, and the cross-sections perpendicular to the axis of the plurality of buckling-resistant materials are formed to have a square outline. A structural member characterized by the above. The structural member according to any one of claims 1 to 5,
A structural member, wherein a filler is filled inside the buckling resistant material. The structural member according to claim 6,
A cylinder that is formed inside the buckling-resistant material and through which the core material can be driven in the axial direction;
A piston that is fixed to the core and divides the inside of the cylinder into two chambers filled with the filler as working fluid;
One end of the core material and the other end of the cylinder are formed so as to be capable of relative displacement in the axial direction by receiving a tensile force or a compressive force, and when the other end side of the core material has a maximum displacement, A structural member, wherein the structural member engages with the other end side of the cylinder, and is formed so that one end side of the cylinder is locked to one end side of the core member when the minimum displacement is achieved. The structural member according to claim 7,
A structural member, wherein the piston is provided with a fluid passage through which the working fluid flows between the two chambers. The structural member according to claim 7,
The structural member according to claim 1, wherein the fluid passage of the piston is formed so that different resistance force is generated depending on a direction in which the working fluid flows.

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