WO2022123805A1 - スタッドボルト - Google Patents
スタッドボルト Download PDFInfo
- Publication number
- WO2022123805A1 WO2022123805A1 PCT/JP2021/016454 JP2021016454W WO2022123805A1 WO 2022123805 A1 WO2022123805 A1 WO 2022123805A1 JP 2021016454 W JP2021016454 W JP 2021016454W WO 2022123805 A1 WO2022123805 A1 WO 2022123805A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw shaft
- plate material
- stud bolt
- recessed
- annular groove
- Prior art date
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- 239000000463 material Substances 0.000 claims description 96
- 230000003449 preventive effect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 85
- 230000004888 barrier function Effects 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
- F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
- F16B37/068—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the support, e.g. the sheet or plate
-
- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
-
- 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/05—Bolts fastening by swaged-on collars
-
- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
- F16B35/048—Specially-shaped necks
-
- 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
Definitions
- the present invention relates to a stud bolt that is fixed to a plate material to be mounted in a retaining state and a rotation preventing state.
- a stud bolt (clinch stud) that is fixed in a retaining state and a detenting state by being press-fitted into a mounting hole of a metal plate material (mounting target plate material)
- the stud bolt comprises a head and a threaded shaft extending from the seating surface of the head.
- the stud bolt described in Patent Document 1 has a non-perfect circular detent portion (a detent protrusion in the document) that bulges from the bearing surface toward the lower side in the screwing direction of the screw shaft portion, and the diameter of the screw shaft portion.
- An annular groove portion (retaining groove in the literature) recessed in an annular shape toward the inside in the direction, and an annular protrusion (retaining ring in the literature) protruding in an annular shape at a position adjacent to the lower side in the screwing direction with respect to the annular groove portion. , Is equipped.
- the protruding portion is a detent protrusion when the stud bolt is press-fitted into the metal plate material. It is crushed by and pushes a large amount of metal into the holding groove to increase the pull-out load and idling torque.
- the metal that is crushed and flows by the detent protrusion protrudes from the periphery of the mounting hole located on the opposite side of the head to the radial outside of the holding ring and burrs. It is easy to become. Further, the metal crushed by the detent protrusions flows to the outside in the radial direction of the detent protrusions to cause deformation, and the metal plate material is liable to warp. As a result, when fixing another member to the metal plate material, inconveniences such as damage to the other member by burrs, burrs becoming foreign substances and scattering to the surroundings, and warped metal plate material interfering with surrounding parts occur. The quality of the product deteriorates.
- the characteristic configuration of the stud bolt according to the present invention is a stud bolt that is fixed to the plate material to be mounted in a retaining state and a rotation preventing state, and is a screw shaft portion extending from the head and the seat surface of the head.
- a detent portion that is formed in a non-round shape that surrounds the screw shaft portion in the screwing direction view of the screw shaft portion and that bulges from the bearing surface toward the lower side in the screwing direction, and the screw shaft.
- an annular groove portion recessed in an annular shape toward the radial inward side of the screw shaft portion at a position adjacent to the detent portion on the lower side in the screwing direction, and the screw shaft portion.
- the seat surface and the annular protrusion are provided with an annular protrusion that projects annularly toward the radial outer side of the screw shaft portion at a position adjacent to the annular groove portion on the lower side in the screwing direction.
- the plate material to be mounted is sandwiched between the two, and the detent portion is formed with a recessed portion recessed toward the upper side in the screwing direction.
- the detent portion, the annular groove portion, and the annular protrusion portion that bulge from the seat surface of the head are arranged in order along the screwing direction, and the detent portion is good in the screwing direction.
- a recessed portion recessed toward the side is formed.
- the mounting target plate material while the mounting target plate material enters the annular groove portion to secure the pull-out load, the mounting target plate material also enters the recessed portion, so that the shear cross-sectional area of the mounting target plate material increases and the idling torque can be improved. Moreover, since the mounting target plate material preferentially enters the recessed portion, the mounting target plate material does not easily protrude outward in the radial direction of the recessed portion, and warpage of the mounting target plate material can be prevented to improve the quality. In this way, we were able to provide stud bolts that can improve the quality when fixed to the plate material to be mounted.
- Another characteristic configuration is that the recessed portion is formed so as to be deeper as it is closer to the screw shaft portion.
- the recessed portion is formed deeper as it is closer to the screw shaft portion as in this configuration, the plate material to be mounted that is crushed and flows is smoothly guided in the direction of the annular groove portion. As a result, it is possible to appropriately secure the pull-out load due to the plate material to be mounted entering the annular groove portion.
- Another characteristic configuration is that the inner edge portion of the recessed portion reaches the annular groove portion, and the recessed portion and the annular groove portion are continuous.
- the recessed portion and the annular groove portion are continuous as in this configuration, the mounting target plate material that is crushed and flows is guided in the direction of the annular groove portion without a barrier. As a result, it is possible to appropriately secure the pull-out load due to the plate material to be mounted entering the annular groove portion.
- the recessed portion reaches the outer edge portion of the detent portion, and the outer edge portion is formed with a convex portion that protrudes in a tapered state toward the lower side in the screwing direction.
- this convex portion is the mounting target. It is possible to improve the idling torque by biting into the plate material. Moreover, since the convex portion serves as a barrier, the mounting target plate material that has entered the recessed portion does not easily protrude outward in the radial direction of the convex portion, and warpage of the mounting target plate material can be reliably prevented.
- convex portion is formed in a cross-sectional shape having an inclined portion on the screw shaft portion side and an upright portion having a steeper slope than the inclined portion on the opposite side of the screw shaft portion.
- the plate material to be mounted is further inserted toward the recessed portion. , It is possible to surely prevent the plate material to be mounted from protruding outward in the radial direction of the recessed portion. Moreover, even when the metal plate rotates and a rotational torque is applied to the stud bolts, the erection part stands on a steep slope, so the component force in the pull-out direction of the stud bolts becomes small, and the pull-out load is reduced. It can be secured appropriately.
- Another characteristic configuration is that the recessed portion is formed in an endless shape surrounding the screw shaft portion.
- the recessed portion has an endless shape that surrounds the screw shaft portion as in this configuration, the plate material to be mounted that is crushed and flows is guided in the direction of the annular groove portion without a barrier. As a result, it is possible to appropriately secure the pull-out load due to the plate material to be mounted entering the annular groove portion.
- FIG. 2 is a view taken along the line III-III in FIG.
- FIG. 3 is a sectional view taken along line IV-IV of FIG. It is an enlarged sectional view at the position where the convex part is the farthest from the annular protrusion. It is an enlarged sectional view at the position where the convex part is closest to the annular protrusion. It is sectional drawing before press-fitting a stud bolt into a plate material to be attached. It is sectional drawing after press-fitting a stud bolt into a plate material to be attached.
- the stud bolt B has a flat cylindrical head 1 having a pair of rounded edges along the circumferential direction and a screw shaft extending from the seat surface 11 of the head 1. It has a part 2.
- a male screw portion 2A is formed in most of the screw shaft portion 2, and the screwing direction X of the screw shaft portion 2 coincides with the extending direction of the screw shaft portion 2.
- the screwing direction X means a direction in which the stud bolt B advances with respect to the female screw when the male screw portion 2A of the screw shaft portion 2 is screwed into a female screw (not shown).
- the tip end side of the screw shaft portion 2 will be referred to as the lower side X1 in the screwing direction
- the base end side of the screw shaft portion 2 (the connection side between the head 1 and the screw shaft portion 2)
- the upper side X2 in the screwing direction.
- the stud bolt B is fixed to the metal plate material T in a retaining state and a rotation preventing state, so that the male screw portion 2A of the screw shaft portion 2 protrudes from the metal plate material T, and the jig G Is exposed to the outside by removing.
- the stud bolt B is made of a metal material such as low carbon steel having a higher rigidity than the metal plate material T.
- the stud bolt B is press-fitted into the metal plate material T by a hydraulic press P, and the metal plate material T is crushed. As a result, the metal plate material T is sandwiched between the seat surface 11 of the head 1 and the annular protrusion 22 described later.
- the stud bolt B has a detent portion 3 that bulges from the seat surface 11 of the head portion 1 toward the lower side X1 in the screwing direction, and the screw shaft portion 2 inward in the radial direction.
- An annular groove portion 21 recessed in an annular shape toward the surface and an annular protrusion 22 protruding outward in the radial direction of the screw shaft portion 2 are provided.
- the annular groove portion 21 is located adjacent to the lower side X1 in the screwing direction with respect to the detent portion 3 in the screw shaft portion 2, and the annular protrusion 22 is the annular groove portion 21 in the screw shaft portion 2. It is located adjacent to X1 on the lower side in the screwing direction. That is, the detent portion 3, the annular groove portion 21, and the annular protrusion 22 are arranged in order along the screwing direction X.
- the groove width of the annular groove portion 21 is set according to the shape of the annular protrusion 22, the ductility of the metal plate material T, and the like, and is set to be equivalent to the plate thickness of the metal plate material T in the present embodiment (also in FIG. 8). reference).
- the annular groove 21 and the annular protrusion 22 are continuous in an R shape, and the annular protrusion 22 and the male screw portion 2A are continuous in a tapered shape (see also FIG. 4).
- the annular groove portion 21 in the present embodiment has an outer diameter smaller than the outer diameter of the male screw portion 2A formed on the screw shaft portion 2, and the annular protrusion 22 has a male screw portion formed on the screw shaft portion 2. It has an outer diameter larger than the outer diameter of 2A. Further, the diameter of the annular protrusion 22 in the present embodiment is set to be smaller than the diameter of the through hole Ta of the metal plate material T (see also FIG. 7).
- the detent portion 3 is formed in a hexagram shape (an example of a non-round shape) surrounding the screw shaft portion 2 in the screwing direction X view.
- the outer edge portion 31 of the detent portion 3 is concave inward in the radial direction connecting the rounded corner portions 31a which are the vertices of a plurality of (six in the present embodiment) radially arranged and the pair of rounded corner portions 31a. It has a plurality of formed connection sides 31b (six in this embodiment).
- the circumscribed circles of the plurality of rounded corner portions 31a have a diameter equivalent to that of the outer peripheral side edge portion 11a of the seat surface 11.
- the rounded corner portion 31a has a pointed shape so that the connecting side 31b is moved as much as possible to the outside in the radial direction as compared with the case where the rounded corner portion 31a has a bulging semicircular shape. Therefore, the volume of the recessed portion 32, which will be described later, can be increased. Due to the shape of the detent portion 3, when the detent portion 3 is press-fitted into the metal plate material T, the stud bolt B is in a detent state with respect to the metal plate material T.
- the detent portion 3 is formed with a recessed portion 32 recessed in an annular shape toward the upper side X2 in the screwing direction (see also FIG. 1).
- the recessed portion 32 forms a convex portion 31A protruding toward the lower side X1 in the screwing direction on the outer edge portion 31 of the detent portion 3.
- the convex portion 31A is formed at the same height over the entire area.
- the volumes of the recessed portion 32 and the annular groove portion 21 for accommodating the metal of the metal plate material T are set according to the volume and ductility of the metal plate material T that flows when the convex portion 31A is crushed and plastically deformed (). See also FIG. 8).
- the inner edge portion 32a of the recessed portion 32 reaches the annular groove portion 21 of the screw shaft portion 2 and is continuous with the annular groove portion 21 in an R shape, and the outer edge portion 32b of the recessed portion 32 is the most protruding portion of the convex portion 31A. It reaches the end 31Aa (the outer edge portion 31 of the detent portion 3) and is continuous with the convex portion 31A.
- the recessed portion 32 and the convex portion 31A have an inclined portion 30 having an inclined cross-sectional shape, and the inclined portion 30 is a portion connecting the recessed portion 32 and the convex portion 31A. Further, the convex portion 31A has an upright portion 31Ab having a cross-sectional shape steeper than that of the inclined portion 30 on the side opposite to the screw shaft portion 2.
- the recessed portion 32 has an inclined portion 30 so as to be deeper from the most protruding end 31Aa toward the screw shaft portion 2, and has a height equivalent to that of the seat surface 11 from the inner end 30b of the inclined portion 30 to the inner edge portion 32a. It has a linear portion 32A having a linear cross section formed in parallel with the screw. That is, the recessed portion 32 has a linear portion 32A having a gentler gradient than the inclined portion 30, with the inner end 30b of the inclined portion 30 as the gradient changing end.
- the linear portion 32A is continuous so as to have different lengths around the axis of the screw shaft portion 2 (hereinafter, referred to as “circumferential direction”).
- the cross-sectional shape along the radial direction of the detent portion 3 (cut by a line segment perpendicular to the outer edge portion 31 of the detent portion 3 and passing through the center of the screw shaft portion 2) has a dissimilar shape all around. It is formed continuously.
- the convex portion 31A has an inclined portion 30 on the screw shaft portion 2 side and an upright portion 31Ab on the side opposite to the screw shaft portion 2, and connects these inclined portions 30 and the upright portion 31Ab.
- the most protruding end 31Aa is tapered toward the lower side X1 in the screwing direction.
- the inner edge portion 32a of the recessed portion 32 in the present embodiment reaches the annular groove portion 21 over the entire circumference, and the annular groove portion 21 and the recessed portion 32 are continuous over the entire circumference (see also FIG. 1). Further, the outer edge portion 32b of the recessed portion 32 reaches the most protruding end 31Aa of the convex portion 31A over the entire circumference, and the recessed portion 32 and the convex portion 31A are continuous over the entire circumference by the inclined portion 30. ing. That is, the recessed portion 32 is formed in an endless shape surrounding the screw shaft portion 2.
- the convex portion 31A is located farthest from the annular protrusion 22, that is, the center of the rounded corner portion 31a and the screw shaft portion 2 at the same position as the outer peripheral side edge portion 11a of the seat surface 11 shown in FIG.
- An enlarged cross-sectional view cut by a line segment passing through is shown.
- the convex portion 31A is cut at the position closest to the annular protrusion 22, that is, a line segment passing through the most radial inner portion of the connection side 31b shown in FIG. 3 and the center of the screw shaft portion 2.
- An enlarged cross-sectional view is shown.
- the upright portion 31Ab of the convex portion 31A is formed perpendicular to the seat surface 11 of the head 1, and the inclined portion 30 is a virtual vertical line parallel to the upright portion 31Ab.
- the inclination angle ⁇ with respect to L is set to about 55 degrees.
- the inclined portion 30 located at the rounded corner portion 31a has a connecting inclined portion 30a for connecting the inclined portions 30 adjacent to each other in the circumferential direction, and the connecting inclined portion 30a has an inclination angle ⁇ . It is formed with a gentler slope than.
- the inclined portion 30 of the adjacent connecting side 31b has a cross-sectional shape discontinuous in the circumferential direction along the radial direction of the detent portion 3, respectively (see also FIG. 3).
- the inclination angle ⁇ may be 45 degrees or more and 70 degrees or less, preferably 50 degrees or more and 60 degrees or less, and more preferably about 55 degrees. If the inclination angle ⁇ is less than 45 degrees, the wall thickness of the convex portion 31A becomes too small, the fluidity during molding decreases and the rigidity decreases, and if the inclination angle ⁇ exceeds 70 degrees, the convex portion 31A becomes convex.
- the portion 31A becomes too large and the volume of the recessed portion 32 becomes small, resulting in a shortage of the metal accommodating volume.
- the height L1 of the convex portion 31A is set to about one-third of the groove width L2 of the annular groove portion 21.
- the height L1 of the convex portion 31A is preferably one-fourth or more and one-half or less with respect to the groove width L2 of the annular groove portion 21, and if it is less than one-fourth, the volume of the recessed portion 32 is small.
- the storage volume of the metal becomes insufficient, and if it exceeds half, it becomes difficult for the metal to smoothly flow into the recess 32.
- the inner end 30b of the inclined portion 30 in the present embodiment is the most of the annular protrusion 22 in the screwing direction X. It is located slightly inward in the radial direction from the outer circumference. From this configuration, the stud bolt B in a state of being press-fitted into the metal plate material T can secure a large area of the seat surface 11 facing the metal plate material T (see also FIG. 8). As a result, it is possible to secure a large volume of the metal plate material T that enters between the pair of rounded corner portions 31a adjacent to each other in the seat surface 11, and it is possible to improve the idling torque.
- the thick metal accommodated in the annular groove portion 21 and the recessed portion 32 is subjected to a pull-out load. It becomes dominant and can increase the pull-out load.
- the metal plate material T is a thin metal plate such as a steel plate, and has a through hole Ta larger than the diameter of the annular protrusion 22 and smaller than the outer diameter of the detent portion 3 in advance. It is supported by a jig G that can withstand the pressing force of.
- the stud bolt B before being press-fitted into the metal plate material T brings the most protruding end 31Aa of the detent portion 3 into contact with the periphery of the through hole Ta, and presses the hydraulic press P against the head 1. I'm in contact.
- the annular protrusion 22 is housed inside the through hole Ta, and the male screw portion 2A of the screw shaft portion 2 projects toward the jig G side.
- the detent portion 3, the annular groove portion 21, and the annular protrusion 22 that bulge from the seat surface 11 of the head 1 are arranged in order along the screwing direction X, and the rotation thereof.
- the stopper portion 3 is formed with a recessed portion 32 recessed toward the upper side X2 in the screwing direction.
- the generation of burrs is prevented, so that when fixing the separate member to the metal plate material T, there is no inconvenience that the separate member is damaged by the burrs or the burrs become foreign substances and scatter to the surroundings, and the quality is improved. Can be enhanced. Further, while the metal of the metal plate material T enters the annular groove portion 21 to secure the pull-out load, the metal of the metal plate material T also enters the recessed portion 32, so that the shear cross-sectional area of the metal plate material T increases and the idling torque is increased. Can be improved.
- the metal plate material T preferentially enters the recessed portion 32, the metal plate material T does not easily protrude outward in the radial direction of the recessed portion 32, and the warp of the metal plate material T is prevented, so that the warped metal plate material T surrounds the recessed portion 32. There is no inconvenience such as interference with the parts of the above, and the quality can be improved.
- the recessed portion 32 is formed deeper as it is closer to the screw shaft portion 2, the metal of the metal plate material T that is crushed and flows is smoothly guided in the direction of the annular groove portion 21. Since the recessed portion 32 and the annular groove portion 21 are continuous over the entire circumference, the metal of the metal plate material T that is crushed and flows is guided in the direction of the annular groove portion 21 without a barrier. In other words, since the recessed portion 32 has an endless shape surrounding the screw shaft portion 2, the metal of the metal plate material T that is crushed and flows is guided in the direction of the annular groove portion 21 without a barrier, and the recessed portion 32 is formed. Sufficient volume is secured. As a result, the protrusion of the flowing metal is further suppressed and the generation of burrs is prevented, so that the quality can be improved.
- the recessed portion 32 connects the inclined portion 30 which becomes deeper from the most protruding end 31Aa toward the screw shaft portion 2 and the inclined portions 30 adjacent to each other in the circumferential direction, and the connection inclined portion 30a having a gentler gradient than the inclined portion 30. And a linear portion 32A which is gentler than the connecting inclined portion 30a and is continuous so as to have a different length in the circumferential direction.
- the cross-sectional shape of the detent portion 3 along the radial direction in the present embodiment is continuously formed with dissimilar shapes all around.
- the metal of the flowing metal plate T enters the recessed portion 32 in a discontinuous shape in the circumferential direction, and the convex portion 31A and the metal that has entered the recessed portion 32 come into contact with each other to resist idling. Therefore, the idling torque can be increased. Further, by providing the linear portion 32A in the recessed portion 32, it is possible to allow a large amount of metal to enter the inner edge portion 32a of the recessed portion 32 adjacent to the annular groove portion 21, and the idling torque can be further increased.
- the recessed portion 32 extends to the outer edge portion 31 of the detent portion 3 to form a convex portion 31A protruding from the outer edge portion 31 of the detent portion 3 in a tapered state. Therefore, the convex portion 31A can bite into the metal plate material T to improve the idling torque. Since the convex portion 31A is formed at the same height over the entire area, the convex portion 31A can uniformly bite into the metal plate material T to further improve the idling torque.
- the convex portion 31A serves as a barrier, the metal of the metal plate material T that has entered the recessed portion 32 does not easily protrude outward in the radial direction of the convex portion 31A, and the warp of the metal plate material T can be reliably prevented.
- the metal plate material T is placed in the recessed portion 32.
- the metal plate material T can be reliably prevented from protruding outward in the radial direction of the recessed portion 32.
- the metal plate material T rotates and a rotational torque is applied to the stud bolt B, since the upright portion 31Ab stands perpendicular to the metal plate material T, the stud bolt B is in the pull-out direction. The component force becomes extremely small, and the release load can be appropriately secured.
- the non-circular shape of the detent portion 3 may be a hexagonal shape in which the connecting side 31b is formed in a straight line, or a polygonal shape such as a triangular shape, a square shape, or a pentagonal shape.
- the recessed portion 32 of the detent portion 3 may have any shape, such as being partially provided along the circumferential direction, and is not particularly limited. In this case, it is preferable that the cross-sectional shape of the detent portion 3 along the radial direction is formed in a dissimilar shape at least in a part in the circumferential direction.
- the inclined portion 30 of the recessed portion 32 may be omitted, and only the linear portion 32A which is continuous so as to have different lengths in the circumferential direction may be formed.
- a plurality of recesses having different positions in the direction may be provided along the circumferential direction.
- the shape is such that at least the inner edge portion 32a of the recessed portion 32 is continuous in the circumferential direction so that the metal that has entered the recessed portion 32 can flow to the annular groove portion 21.
- the annular groove portion 21 and the annular protrusion 22 may not be formed in an annular shape, but may be formed in an annular shape having a polygonal outer shape.
- the through hole Ta of the metal plate material T may be formed to be smaller than the diameter of the annular protrusion 22, and the inner peripheral portion of the through hole Ta may also be crushed by the annular protrusion 22.
- the most protruding end 31Aa of the convex portion 31A may be sharpened. In this case, the most protruding end 31Aa of the most protruding end 31Aa easily bites into the metal plate material T.
- the plate material to be mounted is not particularly limited as long as it is a plate material formed of a material having fluidity (ductility) in addition to the metal plate material T.
- a female screw portion may be formed on the screw shaft portion 2 instead of the male screw portion 2A.
- the present invention can be used for stud bolts that are fixed to the plate material to be mounted in a preventive state and a non-rotating state.
- Head 2 Screw shaft part 3: Anti-rotation part 11: Seat surface 21: Circular groove part 22: Circular protrusion 30: Inclined part 31: Outer edge part 31A: Convex part 31Ab: Standing part 32: Recessed part B: Stud bolt T: Metal plate material (mounting target plate material)
- X Screwing direction
- X1 Screwing direction lower side
- X2 Screwing direction upper side
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
- Insertion Pins And Rivets (AREA)
- Clamps And Clips (AREA)
Abstract
Description
(1)回り止め部3の非真円形状として、接続辺31bを直線状に形成した六角形状であっても良いし、三角形状、四角形状や五角形状等の多角形状であっても良い。
(2)回り止め部3の凹入部32は、周方向に沿って部分的に設ける等、如何なる形状であっても良く、特に限定されない。この場合、回り止め部3の径方向に沿う断面形状は、周方向の少なくとも一部において非相似形状で形成されていることが好ましい。非相似形状に構成できる形状であれば、凹入部32の傾斜部30を省略して、周方向の長さが異なるように連続している直線状部32Aのみで構成しても良いし、径方向の位置が異なる複数の窪みを周方向に沿って設けても良い。また、凹入部32に入り込んだ金属を環状溝部21まで流動させることのできるように、少なくとも凹入部32の内側縁部32aを周方向に亘って連続させる形状であることが好ましい。
(3)環状溝部21や環状突部22を円環状に形成せずに、外形が多角形状の環状に形成しても良い。また、金属板材Tの貫通孔Taは、環状突部22の直径よりも小さく形成して、貫通孔Taの内周部も環状突部22に押し潰される形状としても良い。
(4)凸状部31Aの最突出端31Aaを尖らせても良い。この場合、最突出端31Aaの最突出端31Aaが金属板材Tに喰い込み易くなる。
(5)取付対象板材として、金属板材Tのほか、流動性(延性)のある材料で形成された板材であれば、特に限定さない。
(6)ネジ軸部2には、雄ねじ部2Aに代えて雌ねじ部を形成しても良い。
2 :ネジ軸部
3 :回り止め部
11 :座面
21 :環状溝部
22 :環状突部
30 :傾斜部
31 :外側縁部
31A :凸状部
31Ab :立設部
32 :凹入部
B :スタッドボルト
T :金属板材(取付対象板材)
X :螺進方向
X1 :螺進方向下手側
X2 :螺進方向上手側
Claims (6)
- 取付対象板材に抜け止め状態かつ回り止め状態で固定されるスタッドボルトであって、
頭部と、
前記頭部の座面から延出されたネジ軸部と、
前記ネジ軸部の螺進方向視において前記ネジ軸部を取り囲む非真円形状に形成され、前記座面から前記螺進方向下手側に向けて膨出する回り止め部と、
前記ネジ軸部のうち、前記回り止め部に対して前記螺進方向下手側に隣り合う位置において、前記ネジ軸部の径方向内側に向けて環状に凹入された環状溝部と、
前記ネジ軸部のうち、前記環状溝部に対して前記螺進方向下手側に隣り合う位置において、前記ネジ軸部の径方向外側に向けて環状に突出する環状突部と、を備え、
前記座面と前記環状突部との間に、前記取付対象板材が挟まれるように構成され、
前記回り止め部に、前記螺進方向上手側に向けて凹入された凹入部が形成されているスタッドボルト。 - 前記凹入部は、前記ネジ軸部に近いほど深くなるように形成されている請求項1に記載のスタッドボルト。
- 前記凹入部の内側縁部は前記環状溝部まで至っており、前記凹入部と前記環状溝部とが連続している請求項1又は2に記載のスタッドボルト。
- 前記凹入部は、前記回り止め部の外側縁部まで至っており、
前記外側縁部には、前記螺進方向下手側に向けて先細り状態で突出する凸状部が形成されている請求項1から3の何れか一項に記載のスタッドボルト。 - 前記凸状部は、前記ネジ軸部側に傾斜部を有すると共に前記ネジ軸部とは反対側に前記傾斜部よりも急勾配の立設部を有する断面形状に形成されている請求項4に記載のスタッドボルト。
- 前記凹入部は、前記ネジ軸部を取り囲む無端形状に形成されている請求項1から5の何れか一項に記載のスタッドボルト。
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KR1020237022908A KR20230116041A (ko) | 2020-12-08 | 2021-04-23 | 스터드 볼트 |
CN202180082675.3A CN116670402A (zh) | 2020-12-08 | 2021-04-23 | 带肩螺栓 |
EP21902912.1A EP4261423A1 (en) | 2020-12-08 | 2021-04-23 | Stud bolt |
US18/256,383 US20240018992A1 (en) | 2020-12-08 | 2021-04-23 | Stud bolt |
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JP2020-203543 | 2020-12-08 | ||
JP2020203543A JP7106621B2 (ja) | 2020-12-08 | 2020-12-08 | スタッドボルト |
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US (1) | US20240018992A1 (ja) |
EP (1) | EP4261423A1 (ja) |
JP (1) | JP7106621B2 (ja) |
KR (1) | KR20230116041A (ja) |
CN (1) | CN116670402A (ja) |
WO (1) | WO2022123805A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2049259A (en) * | 1933-06-09 | 1936-07-28 | Bethlehem Steel Corp | Leakproof bolt |
US4637766A (en) * | 1985-06-17 | 1987-01-20 | Textron Inc. | Clinch type fastener |
US5513933A (en) * | 1994-04-04 | 1996-05-07 | Textron Inc. | Staked fastener with undercut |
US20140003883A1 (en) * | 2012-06-29 | 2014-01-02 | Infastech Intellectual Properties Pte. Ltd. | Self-clinching fastener |
JP2014141999A (ja) | 2013-01-23 | 2014-08-07 | Ueno Tekkosho:Kk | クリンチスタッドの金属板材への取付け方法 |
Family Cites Families (1)
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KR101345152B1 (ko) * | 2012-03-14 | 2013-12-27 | 양현애 | 압입 타입 파스너 및 상기 압입 타입 파스너용 지그 |
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- 2021-04-23 EP EP21902912.1A patent/EP4261423A1/en active Pending
- 2021-04-23 WO PCT/JP2021/016454 patent/WO2022123805A1/ja active Application Filing
- 2021-04-23 US US18/256,383 patent/US20240018992A1/en active Pending
- 2021-04-23 CN CN202180082675.3A patent/CN116670402A/zh active Pending
- 2021-04-23 KR KR1020237022908A patent/KR20230116041A/ko active Search and Examination
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2049259A (en) * | 1933-06-09 | 1936-07-28 | Bethlehem Steel Corp | Leakproof bolt |
US4637766A (en) * | 1985-06-17 | 1987-01-20 | Textron Inc. | Clinch type fastener |
US5513933A (en) * | 1994-04-04 | 1996-05-07 | Textron Inc. | Staked fastener with undercut |
US20140003883A1 (en) * | 2012-06-29 | 2014-01-02 | Infastech Intellectual Properties Pte. Ltd. | Self-clinching fastener |
JP2014141999A (ja) | 2013-01-23 | 2014-08-07 | Ueno Tekkosho:Kk | クリンチスタッドの金属板材への取付け方法 |
Also Published As
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US20240018992A1 (en) | 2024-01-18 |
KR20230116041A (ko) | 2023-08-03 |
JP2022090935A (ja) | 2022-06-20 |
CN116670402A (zh) | 2023-08-29 |
EP4261423A1 (en) | 2023-10-18 |
JP7106621B2 (ja) | 2022-07-26 |
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