WO2014098066A1 - 締結部構造 - Google Patents
締結部構造 Download PDFInfo
- Publication number
- WO2014098066A1 WO2014098066A1 PCT/JP2013/083721 JP2013083721W WO2014098066A1 WO 2014098066 A1 WO2014098066 A1 WO 2014098066A1 JP 2013083721 W JP2013083721 W JP 2013083721W WO 2014098066 A1 WO2014098066 A1 WO 2014098066A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fastening
- rib wall
- nylon
- rib
- strength
- Prior art date
Links
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S5/00—Other constructional members not restricted to an application fully provided for in a single class
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0258—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread using resiliently deformable sleeves, grommets or inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/562—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using extra joining elements, i.e. which are not integral with the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/2457—Parallel ribs and/or grooves
Definitions
- the present invention relates to a fastening portion structure, and more particularly, to a fastening portion structure that prevents undesirable breakage due to shearing from the fastening portion and can smoothly absorb the energy of an external load applied to the fastening portion around the fastening portion.
- the member 31 having the fastening portion 32 in the member 31 having the fastening portion 32, the member 31 is fastened to another member using a fastening member such as a bolt in the fastening portion 32, but a large external load is applied to the member 31.
- a fastening member such as a bolt in the fastening portion 32
- the member 31 may be broken from the fastening portion 32 by shearing or the like due to shearing or the like.
- ribs may be formed radially or concentrically around the fastening portion 32 (for example, Patent Documents 1 and 2).
- Patent Document 1 no special device other than the above-described structure is added to the fastening part itself, and a structure in which the strength of the member is weakened by a slit at a part other than the fastening part is disclosed.
- Patent Document 2 discloses a structure in which an axial load from a fastener is reduced by a load reducing body.
- none of these structures is effective in terms of preventing undesired breakage due to shearing from the fastening portion, smoothly absorbing the energy of the external load applied to the fastening portion around the fastening portion, Ineffective.
- the fastening portion may be broken by successive breaking around the fastening portion. It is possible to smoothly absorb the energy of the applied external load.
- reinforcement for increasing the strength and rigidity of the fastening portion is required, and if the ribs are broken simply by reinforcing them with the ribs, the strength and rigidity of the part will be reduced at a stretch, so energy can be smoothly absorbed. It is difficult to progress sequential destruction for absorption. In other words, it is difficult to reconcile a structure for smoothly proceeding with breakage and a structure for increasing the strength and rigidity of the fastening portion.
- the subject of the present invention is to prevent undesirable breakage due to shearing from the fastening portion, in particular, by adding a special device to the structure around the fastening portion from the above viewpoint, and at the surrounding portion of the fastening portion. It is providing the fastening part structure which can absorb the energy of the external load added to a fastening part smoothly.
- a fastening part structure is a fastening part structure having a plurality of concentric rib walls around a fastening part of a member having a fastening part, and is the closest to the fastening member.
- the bearing strength of at least the second rib wall is lower than the bearing strength of the inner rib wall.
- the bearing strength is expressed as a stress when the displacement of the inner peripheral surface portion starts to increase even if the load acting on the inner peripheral surface of the rib wall does not increase.
- the bearing strength in at least the second rib wall is lower than the bearing strength in the innermost rib wall, when an external load is applied to the fastening part, In the second and subsequent rib walls, the rib wall tends to break down first, and breakage starts from a portion far from the fastening portion. That is, the process of sequential destruction is established around the fastening part, and the sequential destruction is started from a part far from the fastening part.
- the material of the member is not particularly limited as long as it can cause the above-mentioned member to be sequentially broken as described above, but preferably, the member itself can be sequentially broken. It is desirable to consist of materials.
- a material including a resin in particular, a material including a thermoplastic resin
- a resin as such a material that can be sequentially destroyed for example, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polyester such as liquid crystal polyester, Polyolefins such as polyethylene (PE), polypropylene (PP), polybutylene, styrene resins, polyoxymethylene (POM), polyamide (PA), polycarbonate (PC), polymethylene methacrylate (PMMA), polyvinyl chloride (PVC), polyphenylene sulfide (PPS), polyphenylene ether (PPE), modified PPE, polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), polysulfone (P U), modified PSU, polyethersulfone (PES
- Examples thereof include elastomers and the like, and these copolymers, modified products, and resins obtained by blending two or more types may be used.
- a PC resin or ABS resin and a blended material thereof are more preferably used from the viewpoint of high elongation
- a polyamide resin and a blended material thereof are more preferably used from the viewpoint of high strength.
- a preferred polyamide resin used in the present invention is a polymer or copolymer mainly composed of amino acids, lactams or diamines and dicarboxylic acids.
- Representative examples of the raw materials include amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid and paraaminomethylbenzoic acid, lactams such as ⁇ -caprolactam and ⁇ -laurolactam, tetramethylenediamine, penta Methylenediamine, hexamethylenediamine, 2-methylpentamethylenediamine, nonamethylenediamine, decamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5 -Aliphatic diamines such as methylnonamethylenediamine, aromatic diamines such as metaxylylenediamine, paraxylylenediamine, 1,
- polyamides include polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), polytetramethylene adipamide (nylon 46), polytetramethylene sebacamide (nylon 410), Polypentamethylene adipamide (nylon 56), polypentamethylene sebamide (nylon 510), polyhexamethylene sebamide (nylon 610), polyhexamethylene dodecamide (nylon 612), polydecamethylene adipamide ( Nylon 106), polydecane methylene sebamide (nylon 1010), polydecane methylene dodecane (nylon 1012), polyundecanamide (nylon 11), polydodecanamide (nylon 12), polycaproamide / polyhexamethylene adipa Midcopolymer (Nylon 6/66), polycaproamide / polyhexamethylene terephthalamide copolymer (nylon 6 / 6T), polyhexamethylene adipamide / polyhe
- polyamide having a melting point of 220 ° C. to 330 ° C. is preferable.
- the heat resistance deflection temperature under load
- the decomposition of the polyamide can be suppressed during the production of the resin composition, and the heat resistance, high-temperature rigidity, mechanical strength, and resistance of the molded product obtained from the resin composition can be suppressed. Impact properties can be further improved.
- the melting point of the polyamide in the present invention is 20 ° C./min after the temperature of the polyamide is lowered from the molten state to 30 ° C. at a temperature lowering rate of 20 ° C./min using a differential scanning calorimeter. Is defined as the temperature of the endothermic peak that appears when the temperature is raised to the melting point + 40 ° C. However, when two or more endothermic peaks are detected, the temperature of the endothermic peak having the highest peak intensity is defined as the melting point.
- the glass transition temperature of the polyamide is preferably 30 ° C. to 150 ° C.
- the glass transition temperature is 30 ° C. or higher, the high-temperature rigidity, mechanical strength, and impact resistance of the molded product can be further improved. More preferably, it is 45 ° C. or higher.
- the glass transition temperature is 150 ° C. or lower, a resin composition suitable for molding can be obtained by moderately suppressing the crystallization rate during molding.
- the glass transition temperature of the polyamide in the present invention was raised at a rate of temperature increase of 20 ° C./min after rapidly cooling the polyamide with liquid nitrogen in an inert gas atmosphere using a differential scanning calorimeter. It is defined as the temperature at the midpoint of the stepped endothermic peak that appears in the case.
- polyamides having a melting point of 220 ° C. to 330 ° C. and a glass transition temperature of 30 ° C. to 150 ° C. include nylon 6, nylon 610, nylon 66, nylon 46, nylon 410, nylon 56, nylon 6T / 66.
- Copolymers, copolymers having hexamethyl terephthalamide units such as nylon 6T / 6I copolymer, nylon 6T / 12, nylon 6T / 5T, nylon 6T / M5T, nylon 6T / 6 copolymer, nylon 9T, nylon 9T / M8T, Nylon 10T, nylon 10T / 612, nylon 10T / 66, nylon 12T, etc. can be mentioned. It is also practically preferable to blend two or more of these polyamides as required.
- the degree of polymerization of the polyamide is not particularly limited, but the relative viscosity measured in a 98% concentrated sulfuric acid solution having a resin concentration of 0.01 g / ml at 25 ° C. is preferably in the range of 1.5 to 5.0.
- the relative viscosity is 1.5 or more, the mechanical strength, impact resistance, heat resistance and high temperature rigidity of the obtained molded product can be improved.
- a relative viscosity of 2.0 or more is more preferable.
- the relative viscosity is 5.0 or less, the fluidity is excellent and the molding processability is excellent.
- a low-order condensate is obtained by heating the diamine and dicarboxylic acid or salts thereof as raw materials
- Examples thereof include a method for increasing the degree of polymerization by solid phase polymerization and / or melt polymerization.
- Two-stage polymerization in which the low-order condensate is once taken out and solid-phase polymerization and / or melt polymerization is performed.
- solid-phase polymerization and / or melt polymerization is performed in the same reaction vessel. Either of these may be used.
- Solid phase polymerization refers to a step of heating in a temperature range of 100 ° C. or higher and lower than the melting point under reduced pressure or in an inert gas
- melt polymerization refers to a step of heating to a melting point or higher under normal pressure or reduced pressure. Point to.
- the member has three or more concentric rib walls around the fastening part, and a diameter at a portion between the innermost rib wall and the second rib wall. It can be set as the structure whose directional strength is larger than the radial direction strength in the site
- the rib walls can be brought into contact with each other at a portion having a larger outside area among the portions arranged concentrically.
- the rib walls are in contact with each other, it becomes possible to handle a large load, and it is possible to effectively prevent the propagation of breakage to the outside, effectively preventing the entire member from breaking. .
- radial ribs extending in the radial direction are provided between the concentric rib walls. Since the radial rib extending in the radial direction can efficiently handle the radial load, the installation of the radial rib extending in the radial direction greatly increases the strength and rigidity of the fastening portion. That is, while increasing the strength and rigidity of the fastening portion, it is possible to smoothly absorb the energy of the external load through the sequential destruction in the peripheral portion of the fastening portion.
- the fastening part structure it is possible to employ a structure in which a collar is fitted around the fastening member in the fastening part.
- a collar By fastening through the collar, it is possible to avoid the screw part of the fastening member from coming into direct contact with the inner surface of the hole of the component, and to distribute the load evenly when an external load is transmitted. Therefore, an excessive local load is prevented from being applied to the minute part, and smoother energy absorption is possible through the state.
- the type of the fastening member is not particularly limited, but a bolt can be typically used.
- the bearing strength of the rib wall provided concentrically has a specific relationship, and the strength and rigidity of the fastening portion are increased, and the farther from the fastening portion. Since it is possible to start the sequential fracture from the site, it is possible to achieve both the reinforcement of the fastening portion and the smooth energy absorption of the external load due to the sequential fracture.
- FIG. 1 shows a fastening part structure according to an embodiment of the present invention.
- reference numeral 1 denotes a member made of a sequentially breakable material having a fastening portion 2, and a plurality of concentric rib walls 3 and 4 are provided around the fastening portion 2 of the member 1.
- two rib walls 3 and 4 are provided, but three or more concentric rib walls may be provided.
- a plurality of ribs 5 extending radially between the rib walls 3 and 4 are provided between the rib walls 3 and 4.
- At least the bearing strength in the rib wall 4 of the second layer is higher than the bearing strength in the innermost layer rib wall 3 closest to the fastening member (not shown) inserted into the hole of the fastening part 2 for fastening. Is set lower.
- the bearing strength in at least the second rib wall 4 is set lower than the bearing strength in the innermost rib wall 3, an external load is applied to the fastening part 2. At this time, it is attempted to start the fracture from the portion on the rib wall 4 side far from the fastening portion 2, and the sequential fracture process from the outer layer side is established. As a result, the strength and rigidity of the fastening portion 2 are enhanced by the reinforcing structure including the innermost layer rib wall 3, and the energy of the external load applied to the fastening portion 2 due to the start of sequential fracture from a portion far from the fastening portion 2. Will be absorbed smoothly through sequential failure, and both the reinforcement of the fastening portion 2 and the smooth energy absorption of the external load due to sequential failure will be realized.
- reference numeral 11 denotes a member made of a material having a fastening portion and capable of being sequentially broken.
- reinforcing ribs 12 and 13 extending in the vertical and horizontal directions are arranged on the member 11.
- the member 11 is provided with a fastening portion 14, and a bolt 15 is used as a fastening member for the fastening portion 14.
- a plurality of (three layers in this embodiment) rib walls 16, 17, and 18 are provided concentrically around the fastening portion 14 of the member 11. In this fastening portion structure, concentric rib walls 16, 17, 18 may be provided.
- the bearing strength at least in the second rib wall 17 is higher than the bearing strength at the innermost rib wall 16 closest to the bolt 15 inserted for fastening into the hole of the fastening portion 14. It is set low. Furthermore, it is preferable that the bearing strength in the third-layer rib wall 18 is set lower than the bearing strength in the second-layer rib wall 17.
- a plurality of radially extending ribs 19 and 20 are provided between the rib walls 16 and 17 and between the rib walls 17 and 18, respectively. However, a thickness difference is provided between the ribs 19 and 20.
- the radial strength at the site between the innermost rib wall 16 and the second rib wall 17 is the radial strength at the site between the second rib wall 17 and the third rib wall 18.
- the radial strength at the portion between the rib wall 17 of the second layer and the rib wall 18 of the third layer is larger than the innermost rib wall 16 and the rib wall 17 of the second layer.
- the structure is weaker than the radial strength in the region between the two.
- the rib wall of the second layer rather than the portion between the innermost rib wall 16 and the rib wall 17 of the second layer in the sequential fracture process as described above. Since the part between the rib wall 18 of the 17th layer and the third layer can be destroyed first, the rib wall is located at the part having the larger outer area among the parts arranged concentrically. 17, 18 can be brought into contact with each other first. When the rib walls 17 and 18 are in contact with each other, it is possible to handle a large load at this portion, so that propagation of the breakage to the outside can be effectively prevented, and the entire member is broken. Is effectively prevented. Similar to the embodiment described above, both the reinforcement of the fastening portion 14 and the smooth energy absorption of the external load due to the sequential failure are realized in the same manner as the embodiment described above.
- the radial strength in the portion between the innermost rib wall 16 and the second rib wall 17 is the portion in the portion between the second rib wall 17 and the third rib wall 18.
- the following configuration can be adopted.
- (1) The interval between the concentric rib walls is changed. Specifically, when the interval between the innermost layer and the second rib wall is made smaller than the interval between the second layer and the third layer, It becomes easier to buckle between the second layer and the third layer, and the same effect can be obtained.
- the number of radial ribs between the innermost layer and the second concentric rib wall is the number of radial ribs between the second layer and the third layer. More than Even if it does in this way, the radial rib between the 2nd layer and the 3rd layer becomes easy to buckle, and the same effect is acquired.
- the concentric rib wall and the radial rib the height of the rib is increased as the innermost layer is closer. Even if it does in this way, radial direction intensity
- the fastening part structure according to the present invention can be applied to fastening parts in all fields where both the reinforcement of the fastening part and the smooth energy absorption of the external load due to sequential fracture are required.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Vibration Dampers (AREA)
Abstract
Description
図1は、本発明の一実施態様に係る締結部構造を示している。図1において、1は締結部2を有する逐次破壊可能な材料からなる部材を示しており、部材1の締結部2の周囲に同心円状の複数のリブ壁3、4が設けられている。本実施態様では、2つのリブ壁3、4が設けられているが、3つ以上の同心円状のリブ壁が設けられていてもよい。また、本実施態様では、リブ壁3、4間に、リブ壁3、4間にわたって放射状に延びる複数のリブ5が設けられている。この締結部構造において、締結部2の孔に締結のために挿入される締結部材(図示略)に最も近い最内層リブ壁3におけるベアリング強度よりも、少なくとも2層目のリブ壁4におけるベアリング強度の方が低く設定されている。
(1)同心円状のリブ壁の間隔を変える、具体的には、最内層と2層目のリブ壁の間の間隔を、2層目と3層目の間の間隔に比べて小さくすると、2層目と3層目の間の方が座屈しやすくなり、同様の効果が得られる。
(2)また、上記(1)と同様、放射状リブに関して、最内層と2層目の同心円状のリブ壁間の放射状リブの本数を、2層目と3層目の間の放射状リブの本数に比べて多くする。このようにしても、2層目と3層目の間の放射状リブの方が座屈しやすくなり、同様の効果が得られる。
(3)さらに、同心円状リブ壁や放射状リブに関して、最内層に近いほど、リブの高さを高くする。このようにしても、外層側における部位ほど径方向強度を弱めることができ、同様の効果が得られる。
2、14 締結部
3、4、16、17、18 同心円状のリブ壁
5、19、20 放射状に延びるリブ
15 締結部材としてのボルト
Claims (8)
- 締結部を有する部材の該締結部周囲に同心円状の複数のリブ壁を有する締結部構造であって、締結部材に最も近い最内層リブ壁におけるベアリング強度よりも、少なくとも2層目のリブ壁におけるベアリング強度を低くしたことを特徴とする締結部構造。
- 前記部材が、逐次破壊可能な材料からなる、請求項1に記載の締結部構造。
- 前記部材が、樹脂を含む材料から構成されている、請求項1または2に記載の締結部構造。
- 前記部材が、熱可塑性樹脂を含む材料から構成されている、請求項1~3のいずれかに記載の締結部構造。
- 前記部材が締結部周囲に3層以上の同心円状のリブ壁を有し、最内層リブ壁と2層目のリブ壁との間の部位における径方向強度が、2層目のリブ壁と3層目のリブ壁との間の部位における径方向強度よりも大きい、請求項1~4のいずれかに記載の締結部構造。
- 前記同心円状のリブ壁間に、径方向に延びる放射状のリブが設けられている、請求項1~5のいずれかに記載の締結部構造。
- 前記締結部において、締結部材の周囲にカラーが嵌合されている、請求項1~6のいずれかに記載の締結部構造。
- 前記締結部材がボルトからなる、請求項1~7のいずれかに記載の締結部構造。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP13866033.7A EP2937576B1 (en) | 2012-12-18 | 2013-12-17 | Fastening section structure |
US14/652,248 US20150330566A1 (en) | 2012-12-18 | 2013-12-17 | Fastening section structure |
JP2014501119A JP6308437B2 (ja) | 2012-12-18 | 2013-12-17 | 締結部構造 |
CN201380061093.2A CN104797828A (zh) | 2012-12-18 | 2013-12-17 | 紧固部结构 |
Applications Claiming Priority (2)
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JP2012-275708 | 2012-12-18 | ||
JP2012275708 | 2012-12-18 |
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WO2014098066A1 true WO2014098066A1 (ja) | 2014-06-26 |
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PCT/JP2013/083721 WO2014098066A1 (ja) | 2012-12-18 | 2013-12-17 | 締結部構造 |
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US (1) | US20150330566A1 (ja) |
EP (1) | EP2937576B1 (ja) |
JP (1) | JP6308437B2 (ja) |
CN (1) | CN104797828A (ja) |
WO (1) | WO2014098066A1 (ja) |
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WO2017051694A1 (ja) * | 2015-09-25 | 2017-03-30 | 住友電装株式会社 | 車載部品の取付構造 |
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US11059586B2 (en) * | 2019-05-29 | 2021-07-13 | The Boeing Company | Structural spacer members |
US10959323B1 (en) | 2019-09-06 | 2021-03-23 | Performance Motion Devices, Inc. | Over-torque protection features for mounting an electronic device to a heat dissipation object |
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- 2013-12-17 WO PCT/JP2013/083721 patent/WO2014098066A1/ja active Application Filing
- 2013-12-17 EP EP13866033.7A patent/EP2937576B1/en not_active Not-in-force
- 2013-12-17 US US14/652,248 patent/US20150330566A1/en not_active Abandoned
- 2013-12-17 CN CN201380061093.2A patent/CN104797828A/zh active Pending
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Also Published As
Publication number | Publication date |
---|---|
EP2937576B1 (en) | 2018-05-02 |
CN104797828A (zh) | 2015-07-22 |
JPWO2014098066A1 (ja) | 2017-01-12 |
EP2937576A1 (en) | 2015-10-28 |
US20150330566A1 (en) | 2015-11-19 |
JP6308437B2 (ja) | 2018-04-11 |
EP2937576A4 (en) | 2016-03-02 |
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