JP5820104B2 - Blind bolt - Google Patents
Blind bolt Download PDFInfo
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- JP5820104B2 JP5820104B2 JP2010229237A JP2010229237A JP5820104B2 JP 5820104 B2 JP5820104 B2 JP 5820104B2 JP 2010229237 A JP2010229237 A JP 2010229237A JP 2010229237 A JP2010229237 A JP 2010229237A JP 5820104 B2 JP5820104 B2 JP 5820104B2
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- bolt
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- head
- fastening
- bolt hole
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- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 14
- 238000010276 construction Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
Classifications
-
- 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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
- Insertion Pins And Rivets (AREA)
Description
本発明は、例えば板状の複数の部材を重ね合わせて締結する作業を、片側から行うことができるブラインドボルトに関する。 The present invention relates to a blind bolt capable of performing, for example, a work of overlapping and fastening a plurality of plate-shaped members from one side.
２つの板材を締結する手段として、六角柱の頭部を有するボルトと六角柱の形状のナットとの組合せが一般的である。しかし、ボルトとナットとの組合せは、締結する際に供回りを防止する必要があることから、板材の一方の側からのみ作業が可能な場合には、ブラインドボルトが使用される。
ブラインドボルトは、一端に六角柱の頭部を有し他端側の一部に雌ネジが設けられた円筒状のリベット部材と、雌ネジに螺合するボルト部材で構成され、重ね合わせた板材の孔を貫通させ一端側でボルト部材を締め付けることにより、板材の他方の側においてリベット部材の他端側中途部分を屈曲させて外方に拡げ、複数の板材を締結する（特許文献１）。
As a means for fastening two plate members, a combination of a bolt having a hexagonal column head and a nut having a hexagonal column shape is common. However, since the combination of the bolt and the nut needs to prevent rotation when fastening, a blind bolt is used when the work can be performed only from one side of the plate material.
The blind bolt is composed of a cylindrical rivet member having a hexagonal column head at one end and a female screw provided at a part of the other end, and a bolt member that is screwed into the female screw, and is a stacked plate member The other end side of the rivet member is bent on the other side of the plate material and expanded outwardly to fasten a plurality of plate materials (Patent Document 1).
ブラインドボルトには、ボルト部材の頭部が所定のトルクを超えると破断して雄ネジ部分と切り離されることにより、施工時にトルクレンチを不要とし、かつその後の操作を不要としたブラインドボルトも提案されている（特許文献２）。 For blind bolts, there is also proposed a blind bolt that eliminates the need for a torque wrench during construction and subsequent operation by breaking when the head of the bolt member exceeds a predetermined torque and being separated from the male screw part. (Patent Document 2).
特許文献１，２に開示されたブラインドボルトは、リベット部材が屈曲可能な程度に塑性変形し易く形成されており、半端な屈曲では締結後容易に緩みが生ずる。そのため、施工時に、リベット部材はそれ以上変形しない限界にまで屈曲される。
ところで、例えばモーター等の動力源を備えた機器および設備等では、動力源からの振動等によって、ブラインドボルトによる締結部分に緩みが生ずるおそれがある。
The blind bolts disclosed in Patent Documents 1 and 2 are formed so as to be easily plastically deformed to such an extent that the rivet member can be bent, and loosening occurs easily after fastening at half-end bending. Therefore, at the time of construction, the rivet member is bent to the limit at which it does not further deform.
By the way, for example, in equipment and facilities equipped with a power source such as a motor, there is a possibility that a fastening portion by a blind bolt may be loosened due to vibrations from the power source.
しかし、ブラインドボルトによる締結部分に緩みが生じた場合、特許文献１，２に開示されたブラインドボルトには、その締結に関わる構造から、増し締めを行うことができな
いという問題がある。
本発明は、上述の問題に鑑みてなされたもので、締結後経時等により緩みが生じた場合に増し締めを行うことができるブラインドボルトを提供することを目的とする。
However, when loosening occurs in the fastening portion by the blind bolt, the blind bolt disclosed in Patent Documents 1 and 2 has a problem that additional tightening cannot be performed due to the structure related to the fastening.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a blind bolt that can be tightened when loosening occurs due to lapse of time or the like after fastening.
本発明に係るブラインドボルトは、締結部材、ボルト部材および拡径部材で構成され、前記締結部材は、外形が略円柱状の円筒状部と、前記円筒状部の一端において前記円筒状部から径方向に拡がる頭部と、前記円筒状部および前記頭部をその軸方向に貫通するボルト用孔と、を有し、前記ボルト部材は、前記ボルト用孔に挿入可能であって雄ネジが設けられた軸部と、前記ボルト用孔に挿入不能であって前記軸部の一端に一体化され前記軸部を回転させる工具または装置に連結可能または係合可能な頭部と、を有する。 The blind bolt according to the present invention includes a fastening member, a bolt member, and a diameter-expanding member, and the fastening member has a cylindrical portion whose outer shape is substantially columnar, and a diameter from the cylindrical portion at one end of the cylindrical portion. And a bolt hole penetrating the cylindrical portion and the head in the axial direction, and the bolt member can be inserted into the bolt hole and provided with a male screw. And a head portion that cannot be inserted into the bolt hole and can be connected to or engaged with a tool or device that is integrated with one end of the shaft portion and rotates the shaft portion.
前記拡径部材は、略円錐台形の拡径部と、前記拡径部の下底をその底面として前記拡径部に一体となった外形が略円柱状の本体と、からなり、その軸心を前記雄ネジに螺合する雌ネジが貫通している。
前記拡径部は、前記本体とは反対側の端の外径が前記ボルト用孔の内径よりも小さく、前記本体は、その外径が前記ボルト用孔の内径よりも大きい。
The diameter-expanding member comprises a substantially frustoconical diameter-expanded portion, and a main body having a substantially cylindrical outer shape integrated with the diameter-expanded portion with the bottom of the diameter-expanded portion as a bottom surface. Is threaded through the female screw.
The enlarged diameter portion has an outer diameter at the end opposite to the main body smaller than the inner diameter of the bolt hole, and the main body has an outer diameter larger than the inner diameter of the bolt hole.
前記拡径部の周面には、前記周面の母線に沿って略同じ高さで凸となって線状に延びた複数の凸帯が設けられ、前記ボルト用孔の内面には、前記複数の凸帯の互いに異なるいずれかを嵌め入れ可能な複数の凹溝が、前記径方向に拡がる頭部とは前記軸方向についての反対側の端から前記頭部に向けて前記軸方向に延びている。
ここでいう「略円柱状」とは、完全な円柱のほかに、いずれかの形状に例えるとすれば円柱といえる形状を含み、また周面が円滑でなく例えば周面に軸心方向の溝を多数有する形状も含まれる。
The peripheral surface of the diameter-expanded portion is provided with a plurality of convex bands that extend in a line and are convex at substantially the same height along the generatrix of the peripheral surface, and on the inner surface of the bolt hole, A plurality of concave grooves into which any one of the plurality of convex bands can be fitted to each other extends in the axial direction from the opposite end in the axial direction to the head extending from the radial direction toward the head. ing.
The term “substantially cylindrical” as used herein includes, in addition to a perfect cylinder, any shape that can be said to be a cylinder, and the peripheral surface is not smooth, for example, an axial groove on the peripheral surface. A shape having a large number of is also included.
本発明によると、締結後経時等により緩みが生じた場合に増し締めを行うことができるブラインドボルトを提供することができる。 According to the present invention, it is possible to provide a blind bolt capable of performing additional tightening when loosening occurs due to elapse of time or the like after fastening.
図１はブラインドボルト１の正面半断面図、図２はブラインドボルト１の平面図、図３はブラインドボルト１の下面図、図４は締結状態のブラインドボルト１の正面半断面図である。
ブラインドボルト１は、締結部材２、ボルト部材３および拡径部材４で構成される。
締結部材２は、円筒状部１１および頭部１２からなる。円筒状部１１は、軸心を通り断面が円形の孔を有する円筒である。頭部１２は、形状が六角柱であって、その軸心を円筒状部１１の軸心に一致させて円筒状部１１と一体になり、円筒状部１１の孔に連続し同じ内径の孔が貫通している。円筒状部１１の孔およびこれに連続する頭部１２の孔を併せてボルト用孔１６という。頭部１２は、円筒状部１１の径方向外方にフランジ状（鍔状）に拡がる。締結部材２は、適度な強度と組成変形性とを有する金属材料、例えば炭素鋼で形成される。
1 is a front half sectional view of the blind bolt 1, FIG. 2 is a plan view of the blind bolt 1, FIG. 3 is a bottom view of the blind bolt 1, and FIG. 4 is a front half sectional view of the blind bolt 1 in a fastened state.
The blind bolt 1 includes a fastening member 2, a bolt member 3, and a diameter expanding member 4.
The fastening member 2 includes a cylindrical portion 11 and a head portion 12. The cylindrical portion 11 is a cylinder having a hole passing through an axis and having a circular cross section. The head portion 12 is a hexagonal column, and its axial center coincides with the axial center of the cylindrical portion 11 so as to be integrated with the cylindrical portion 11 and is continuous with the hole of the cylindrical portion 11 and has the same inner diameter. Has penetrated. The hole of the cylindrical part 11 and the hole of the head part 12 continuing to the hole are collectively referred to as a bolt hole 16. The head portion 12 extends in a flange shape (saddle shape) outward in the radial direction of the cylindrical portion 11. The fastening member 2 is made of a metal material having an appropriate strength and composition deformability, for example, carbon steel.
ボルト部材３は、頭部１３に六角レンチ用の孔１４を有する六角穴付きボルトである。雄ネジが設けられた軸部１５の軸径は、締結部材２の孔の内径より僅かに小さい。軸部１５の長さは、締結部材２の孔を貫通しさらに外部に露出する程度である。ボルト部材３は、全ネジが好ましいが、ネジ部分が締結に十分な長さを有すれば半ネジでもよい。
拡径部材４は、外形が略円錐台状の拡径部２１、および外形が円柱状の本体２２からなる。拡径部２１は、上底（径が小さい方の底）側近傍において、周面の母線の軸心に対する傾斜が一段と大きくなっている。拡径部２１は、上底側外径がボルト用孔１６の内径よりも小さい。
The bolt member 3 is a hexagon socket head cap bolt having a hexagon wrench hole 14 in the head portion 13. The shaft portion 15 provided with the male screw has a shaft diameter slightly smaller than the inner diameter of the hole of the fastening member 2. The length of the shaft portion 15 is such that it passes through the hole of the fastening member 2 and is exposed to the outside. The bolt member 3 is preferably a full screw, but may be a half screw if the screw portion has a sufficient length for fastening.
The diameter-expanding member 4 includes a diameter-enlarged portion 21 whose outer shape is substantially frustoconical and a main body 22 whose outer shape is cylindrical. In the enlarged diameter portion 21, the inclination with respect to the axis of the generatrix of the peripheral surface is further increased in the vicinity of the upper bottom (bottom of the smaller diameter) side. The enlarged diameter portion 21 has an upper bottom side outer diameter smaller than the inner diameter of the bolt hole 16.
本体２２は、その軸心を拡径部２１の軸心と一致させその一方の底（面）が拡径部２１の下底に連続する。本体２２の外径は、締結部材２の円筒状部１１の外径と同じまたはそれ以下であり、かつボルト用孔１６の内径より大きい。拡径部材４は、拡径部２１および本体２２の軸心を通りボルト部材３の雄ネジに螺合する雌ネジ２３を備える。
拡径部材４は、拡径部２１の形状を球または楕円球とすることができ、拡径部材４全体の形状を砲弾形とすることができる。
The main body 22 has its axis aligned with the axis of the enlarged diameter portion 21, and one bottom (surface) thereof is continuous with the lower bottom of the enlarged diameter portion 21. The outer diameter of the main body 22 is the same as or smaller than the outer diameter of the cylindrical portion 11 of the fastening member 2 and is larger than the inner diameter of the bolt hole 16. The diameter-expanding member 4 includes a female screw 23 that passes through the axis of the diameter-expanded portion 21 and the main body 22 and is screwed into the male thread of the bolt member 3.
In the diameter-expanding member 4, the diameter-expanding portion 21 can have a spherical or elliptical shape, and the entire diameter-expanding member 4 can have a bullet shape.
次に、ブラインドボルト１による板材の締結について説明する。
図１を参照して、ブラインドボルト１は、ボルト部材３の軸部１５が、締結部材２の頭部１２側からボルト用孔１６内に挿入される。締結部材２の他端から飛び出た軸部１５には、拡径部材４が拡径部２１側から螺合される。ボルト部材３は、拡径部２１の端部がボルト用孔１６内に進入し拡径部材４の供回りが阻止される程度にまで回転される。ブラインドボルト１は、このように一体化された後、締結する板材に共通に設けられた貫通孔２５に拡径部２１側から差し入れられる。
Next, fastening of the plate material by the blind bolt 1 will be described.
Referring to FIG. 1, in the blind bolt 1, the shaft portion 15 of the bolt member 3 is inserted into the bolt hole 16 from the head 12 side of the fastening member 2. The diameter-expanding member 4 is screwed onto the shaft portion 15 protruding from the other end of the fastening member 2 from the diameter-expanding portion 21 side. The bolt member 3 is rotated to such an extent that the end portion of the enlarged diameter portion 21 enters the bolt hole 16 and the rotation of the enlarged diameter member 4 is prevented. After being integrated in this way, the blind bolt 1 is inserted into the through-hole 25 provided in common in the plate material to be fastened from the enlarged diameter portion 21 side.
板材の締結に使用されるブラインドボルト１は、本体２２の外径に締結部材２の円筒状部１１の厚さの２倍を加えた数値が貫通孔２５の内径より大きな拡径部材４を有するものが使用される。つまり、目的とする締結強度を得るために選択されたブラインドボルト１に応じて、上記の要件を満たす内径の貫通孔２５が板材に設けられる。
また、使用されるブラインドボルト１は、締結部材２の円筒状部１１の長さが、貫通孔２５の長さに拡径部材４の長さを加えた以上のものが好ましい。
The blind bolt 1 used for fastening plate members has a diameter-expanding member 4 in which a numerical value obtained by adding twice the thickness of the cylindrical portion 11 of the fastening member 2 to the outer diameter of the main body 22 is larger than the inner diameter of the through hole 25. Things are used. That is, according to the blind bolt 1 selected in order to obtain the target fastening strength, a through hole 25 having an inner diameter that satisfies the above requirements is provided in the plate material.
Further, the blind bolt 1 used is preferably such that the length of the cylindrical portion 11 of the fastening member 2 is greater than the length of the through-hole 25 plus the length of the diameter-expanding member 4.
ブラインドボルト１による締結作業には、締結装置ＴＤが使用される。図４を参照して、締結装置ＴＤは、回転六角レンチ５１および締結部材押さえ５２を有する。回転六角レンチ５１は、断面六角形のレンチがその軸心回りに回転するものである。締結装置ＴＤは、回転六角レンチ５１と駆動源とが空転クラッチで連結され、所定のトルク以上で駆動源が空転する。回転六角レンチ５１は、ボルト部材３の頭部１３に設けられた孔１４に嵌め入れられ、ボルト部材３を一方向（締まる方向）に回転させる。締結部材押さえ５２は、締結部材２の六角形の頭部１２を嵌め入れてその軸心回りの回転を制限する。 A fastening device TD is used for fastening work by the blind bolt 1. With reference to FIG. 4, the fastening device TD includes a rotary hexagon wrench 51 and a fastening member presser 52. The rotary hexagon wrench 51 is a hexagonal wrench that rotates about its axis. In the fastening device TD, the rotary hexagon wrench 51 and the drive source are connected by an idle clutch, and the drive source idles at a predetermined torque or more. The rotating hexagon wrench 51 is fitted into the hole 14 provided in the head 13 of the bolt member 3 and rotates the bolt member 3 in one direction (tightening direction). The fastening member presser 52 fits the hexagonal head 12 of the fastening member 2 and restricts the rotation around the axis.
さて、ブラインドボルト１は、締結部材２の頭部１２が締結部材押さえ５２により供回りを制限された状態でボルト部材３が回転すると、螺合する拡径部材４が円筒状部１１におけるボルト用孔１６内に進入する。拡径部材４は、形状が円錐台の拡径部２１が、円筒状部１１を径方向に押し拡げながらボルト用孔１６内を進入する。このとき、ボルト部材３の頭部１３は、締結部材２の頭部１２に係止されて、拡径部材４をボルト用孔１６内に引き寄せる。 Now, when the bolt member 3 rotates with the head 12 of the fastening member 2 restricted by the fastening member presser 52, the blind bolt 1 is used for the bolt in the cylindrical portion 11 when the bolt member 3 rotates. Enter the hole 16. The diameter-expanding member 4 enters the bolt hole 16 while the diameter-expanded portion 21 having a truncated cone shape expands the cylindrical portion 11 in the radial direction. At this time, the head portion 13 of the bolt member 3 is locked to the head portion 12 of the fastening member 2 and draws the diameter-expanding member 4 into the bolt hole 16.
拡径部材４が貫通孔２５の内方に入り込むと、回転六角レンチ５１の回転トルクが増加し、押し拡げられた円筒状部１１は、強く貫通孔２５の内面を押圧する。やがて回転トルクが所定の値になると空転クラッチによって回転六角レンチ５１の回転が停止し、ブラインドボルト１による板材の締結が終了する。
ブラインドボルト１は、拡径部材４の拡径部２１が、締結作業時に円筒状部１１を押しひろげるとともに、締結後にはくさびの役割を果たす。
When the diameter-expanding member 4 enters the inside of the through hole 25, the rotational torque of the rotary hexagon wrench 51 increases, and the cylindrical portion 11 that has been expanded strongly presses the inner surface of the through hole 25. When the rotational torque eventually reaches a predetermined value, the rotation of the rotary hexagon wrench 51 is stopped by the idle clutch, and the fastening of the plate material by the blind bolt 1 is completed.
In the blind bolt 1, the enlarged diameter portion 21 of the enlarged diameter member 4 pushes and expands the cylindrical portion 11 during the fastening operation, and also plays a role of a wedge after fastening.
ブラインドボルト１は、板材等の締結後、ボルト部材３を逆回転させ、締結部分から取り除くことができる。また、ブラインドボルト１は、振動等により締結部分に緩みが生じたときには、ボルト部材３を（螺合部分が進行する方向に）正回転させ、さらに円筒状部１１を押し拡げることにより、緩みを解消させることができる。
締結部分からボルト部材３が取り外された場合でも、ボルト部材３を締結部材２の頭部１２側からボルト用孔１６に挿入して拡径部材４に螺合させ拡径部材４をボルト用孔１６内に進入させることにより、円筒状部１１を押し拡げて緩みを解消し、強い締結状態に回復させることができる。
The blind bolt 1 can be removed from the fastening portion by reversely rotating the bolt member 3 after fastening the plate material or the like. Further, when the blind bolt 1 is loosened at the fastening portion due to vibration or the like, the bolt member 3 is rotated forward (in the direction in which the screwing portion advances), and the cylindrical portion 11 is further expanded to loosen the bolt. It can be eliminated.
Even when the bolt member 3 is removed from the fastening portion, the bolt member 3 is inserted into the bolt hole 16 from the head 12 side of the fastening member 2 and screwed into the diameter expanding member 4 so that the diameter expanding member 4 is screwed into the bolt hole. By making it enter into 16, the cylindrical part 11 can be expanded, a looseness can be eliminated, and it can recover to a strong fastening state.
図５は他の形態の拡径部材４Ｂの平面図、図６は拡径部材４Ｂの上面図である。
拡径部材４Ｂは、上記した拡径部材４と同様に、外形が略円錐台状の拡径部２１Ｂ、および外形が円柱状の本体２２からなる。拡径部２１Ｂは、その周面に、母線に沿って線状に凸となった凸帯２６Ｂが、周方向に等間隔に４本設けられている。凸帯２６Ｂの隆起幅は、母線に沿って線状に延びると認められる任意とすることができる。拡径部材４Ｂにおける拡径部２１Ｂは、本体２２に連続する部分から上底に相当する部分までの周面の母線（軸を含む断面の輪郭）が、不連続点を有しない曲線となっている。
FIG. 5 is a plan view of another embodiment of the diameter expanding member 4B, and FIG. 6 is a top view of the diameter expanding member 4B.
The diameter-expanding member 4B includes a diameter-enlarged portion 21B having a substantially frustoconical outer shape and a main body 22 having an outer shape that is cylindrical, like the diameter-expanding member 4 described above. The enlarged-diameter portion 21B is provided with four convex bands 26B that are linearly convex along the generatrix at equal intervals in the circumferential direction. The raised width of the convex band 26B can be arbitrarily recognized as extending linearly along the generatrix. The enlarged-diameter portion 21B of the enlarged-diameter member 4B is a curve in which the generatrix (contour of the cross section including the shaft) of the peripheral surface from the portion continuous to the main body 22 to the portion corresponding to the upper base has no discontinuity. Yes.
拡径部材４Ｂにおける他の部分の形状等は、拡径部材４におけるものと同じであり、図５および図６において拡径部材４におけると同じ符合を付し、説明を省略する。
拡径部材４Ｂに組み合わされる締結部材２は、ボルト用孔１６の内面に、凸帯２６Ｂの隆起幅と同じまたはそれ以上の幅、および凸帯の隆起高さと同じまたはそれ以下の深さであり、軸方向に延びた４本の凹溝２７Ｂ，２７Ｂ，２７Ｂが周方向に等間隔に設けられていることが好ましい。
The shape and the like of the other parts in the diameter-expanding member 4B are the same as those in the diameter-expanding member 4, and the same reference numerals as in the diameter-expanding member 4 are given in FIGS.
The fastening member 2 combined with the diameter expanding member 4B has a width equal to or greater than the raised width of the convex band 26B and a depth equal to or smaller than the raised height of the convex band on the inner surface of the bolt hole 16. The four concave grooves 27B, 27B, 27B extending in the axial direction are preferably provided at equal intervals in the circumferential direction.
凸帯２６Ｂを有する拡径部材４Ｂは、板材等の締結時に回転されるボルト部材３に供回りし難く、確実に強く板材等を締結することができる。
凸帯２６Ｂの数は４に限られず他の数としてもよい。また、凸帯２６Ｂは、周方向に等間隔ではなく、不規則な間隔としてもよい。そのような拡径部材に組み合わされる締結部材に設けられる凹溝２７Ｂは、全ての凸帯２６Ｂがいずれかの凹溝２７Ｂに嵌り込むように配される。
The diameter-expanding member 4B having the convex band 26B is difficult to rotate around the bolt member 3 rotated when the plate material or the like is fastened, and can securely fasten the plate material or the like.
The number of convex bands 26B is not limited to four, and may be other numbers. Further, the convex bands 26B may be irregular intervals instead of equal intervals in the circumferential direction. The concave groove 27B provided in the fastening member combined with such a diameter-expanding member is arranged so that all the convex bands 26B are fitted into any of the concave grooves 27B.
図７および図８はそれぞれ他の形態の頭部１３Ｃ，１３Ｄを有するボルト部材３Ｃ，３Ｄを示す図である。図７および図８において（ａ）は平面図、（ｂ）は正面図である。
ボルト部材３Ｃは、スパナ等で締結を行うことができるように、形状が六角柱の頭部１３Ｃを有する。
ボルト部材３Ｄは、プラスドライバーで締結を行うことができるように、十字型の孔が設けられた頭部１３Ｄを有する。
7 and 8 are views showing bolt members 3C and 3D having heads 13C and 13D of other forms, respectively. 7 and 8, (a) is a plan view and (b) is a front view.
The bolt member 3C has a hexagonal column head 13C so that the bolt member 3C can be fastened with a spanner or the like.
The bolt member 3D has a head portion 13D provided with a cross-shaped hole so that it can be fastened with a Phillips screwdriver.
ボルト部材３Ｃおよびボルト部材３Ｄは、頭部１３Ｃ，１３Ｄの形状を除く他の部分は、ボルト部材３におけるものと同じである。ボルト部材３Ｃおよびボルト部材３Ｄは、上述した締結部材２および拡径部材４，４Ｂと組み合わされて、ブラインドボルトを構成する。
上述の実施形態において、締結部材２の頭部１２は、円筒状部１１の一端の全周において径方向に鍔状に拡がり、円筒状部１１が板材の貫通孔２５に挿入されたときに板材の作業側表面に係止されたものであれば、その形状を任意のものとすることができる。締結部材２は、その頭部１２に、ボルト部材１５との供回り防止のためになんらかの工夫が施されるのが好ましい。
The bolt member 3C and the bolt member 3D are the same as those in the bolt member 3 except for the shapes of the heads 13C and 13D. The bolt member 3C and the bolt member 3D are combined with the fastening member 2 and the diameter expanding members 4 and 4B described above to constitute a blind bolt.
In the above-described embodiment, the head portion 12 of the fastening member 2 expands in a radial shape around the entire circumference of one end of the cylindrical portion 11, and the plate material is inserted when the cylindrical portion 11 is inserted into the through hole 25 of the plate material. Any shape can be used as long as it is locked to the work side surface. The fastening member 2 is preferably provided with some contrivance on the head portion 12 to prevent rotation with the bolt member 15.
頭部１２におけるボルト部材１５との供回り防止のための工夫とは、上記した形状を六角柱とする方策のほかに、スパナに保持等に保持可能なように平行な２つの側面（側面＝軸心に平行な面）を設ける、または円筒状部１１側を向く面に目荒らしを行うもしくは小さな三角錐状の突起を設ける等である。
拡径部材４は、拡径部２１の先端の端縁が、軸心方向から見たときに本体２２の輪郭内に収まれば、拡径部２１の形状を任意のものとすることができる。
The device for preventing the rotation of the head 12 with the bolt member 15 includes two parallel side surfaces (side surfaces = side surfaces = so that they can be held by a spanner in addition to the method of using the above-described shape as a hexagonal column. A surface parallel to the axial center), or roughening the surface facing the cylindrical portion 11 or providing a small triangular pyramidal projection.
The diameter-expanding member 4 can have any shape as long as the end edge of the diameter-expanded portion 21 is within the outline of the main body 22 when viewed from the axial direction.
その他、ブラインドボルト１の各構成または全体の構造、形状、寸法、個数、材質などは、本発明の趣旨に沿って適宜変更することができる。 In addition, each structure of the blind bolt 1 or the whole structure, shape, dimension, number, material, and the like can be appropriately changed in accordance with the spirit of the present invention.
本発明に係るブラインドボルトは、施工後経時により緩みが発生しやすく増し締めが求められる板材等の締結に利用することができる。 The blind bolt according to the present invention can be used for fastening a plate material or the like that is likely to be loosened with time after construction and requires tightening.
１ ブラインドボルト
２ 締結部材
３，３Ｃ，３Ｄ ボルト部材
４，４Ｂ 拡径部材
１１ （締結部材の）円筒状部
１２ （締結部材の）頭部
１３，１３Ｃ，１３Ｄ （ボルト部材の）頭部
１５ （ボルト部材の）軸部
１６ ボルト用孔
２１ （拡径部材の）拡径部
２２ （拡径部材の）本体
２３ （拡径部材の）雌ネジ
２６Ｂ 凸帯
DESCRIPTION OF SYMBOLS 1 Blind bolt 2 Fastening member 3, 3C, 3D Bolt member 4, 4B Diameter-expanding member 11 Cylindrical part 12 (fastening member) Head 13, 13C, 13D Head 15 (bolt member) Head 15 Shaft portion 16 of bolt member 21 Bolt hole 21 Expanded portion 22 of enlarged diameter member Main body 23 of enlarged diameter member Female screw 26B of enlarged diameter member Convex band
Claims (1)
前記締結部材は、
外形が略円柱状の円筒状部と、
前記円筒状部の一端において前記円筒状部から径方向に拡がる頭部と、
前記円筒状部および前記頭部をその軸方向に貫通するボルト用孔と、を有し、
前記ボルト部材は、
前記ボルト用孔に挿入可能であって雄ネジが設けられた軸部と、
前記ボルト用孔に挿入不能であって前記軸部の一端に一体化され前記軸部を回転させる工具または装置に連結可能または係合可能な頭部と、を有し、
前記拡径部材は、
略円錐台形の拡径部と、
前記拡径部の下底をその底面として前記拡径部に一体となった外形が略円柱状の本体と、からなり、
その軸心を前記雄ネジに螺合する雌ネジが貫通し、
前記拡径部は、前記本体とは反対側の端の外径が前記ボルト用孔の内径よりも小さく、
前記本体は、その外径が前記ボルト用孔の内径よりも大きく、
前記拡径部の周面に、前記周面の母線に沿って略同じ高さで凸となって線状に延びた複数の凸帯が設けられ、
前記ボルト用孔の内面には、前記複数の凸帯の互いに異なるいずれかを嵌め入れ可能な複数の凹溝が、前記径方向に拡がる頭部とは前記軸方向についての反対側の端から前記頭部に向けて前記軸方向に延びている
ことを特徴とするブラインドボルト。 It consists of a fastening member, a bolt member and a diameter-expanding member,
The fastening member is
A cylindrical portion having a substantially columnar outer shape;
A head extending radially from the cylindrical portion at one end of the cylindrical portion;
A bolt hole penetrating the cylindrical portion and the head portion in the axial direction,
The bolt member is
A shaft that can be inserted into the bolt hole and provided with a male screw;
A head that cannot be inserted into the bolt hole and can be connected to or engaged with a tool or device that is integrated with one end of the shaft and rotates the shaft;
The expanded member is
An approximately frustoconical diameter-enlarged portion;
The outer shape integrated with the enlarged diameter portion with the bottom of the enlarged diameter portion as the bottom surface is composed of a substantially cylindrical body,
A female screw threaded into the male screw passes through the axis,
The enlarged diameter portion has an outer diameter at the end opposite to the main body smaller than an inner diameter of the bolt hole,
The outer diameter of the main body is larger than the inner diameter of the bolt hole,
On the peripheral surface of the enlarged diameter portion, there are provided a plurality of convex bands extending in a linear shape and protruding at substantially the same height along the generatrix of the peripheral surface,
The inner surface of the bolt holes, the plurality of the plurality of grooves capable fitted different one from each other of the convex band, from said opposite end of the said axial direction and a head extending in the radial direction A blind bolt characterized by extending in the axial direction toward the head .
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010229237A JP5820104B2 (en) | 2010-10-12 | 2010-10-12 | Blind bolt |
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| JP2010229237A JP5820104B2 (en) | 2010-10-12 | 2010-10-12 | Blind bolt |
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| JP5820104B2 true JP5820104B2 (en) | 2015-11-24 |
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| WO2020045348A1 (en) * | 2018-08-27 | 2020-03-05 | 雄治 土肥 | Expansion-type anchor, sleeve used in same, and construction method |
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