WO2010058474A1 - Expansion fastener - Google Patents
Expansion fastener Download PDFInfo
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- WO2010058474A1 WO2010058474A1 PCT/JP2008/071141 JP2008071141W WO2010058474A1 WO 2010058474 A1 WO2010058474 A1 WO 2010058474A1 JP 2008071141 W JP2008071141 W JP 2008071141W WO 2010058474 A1 WO2010058474 A1 WO 2010058474A1
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- expansion
- diameter
- bolt
- wedge
- cylindrical
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- 238000003780 insertion Methods 0.000 claims abstract description 9
- 230000037431 insertion Effects 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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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
- 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
Abstract
[PROBLEMS] An expansion fastener which can simply fasten a member from one side of it to another member to the inside or rear side thereof unreachable by hand and which is prevented from loosening after the tightening. [MEANS FOR SOLVING PROBLEMS] The expansion fastener has a tubular body (3), a female thread section (41), and an expansion wedge (4A). The tubular body (3) includes a tubular section (31) having an insertion hole (33) into which a male thread section (21) of a bolt (2) can be inserted, a flange (32) located at the tail end of the tubular section (31) and capable of being held by a predetermined tool, and expansion slits (34) formed in the tubular section (31) so as to extend from its head end to its tail end. The female thread section (41) is connected to the male thread section (21) of the bolt (2). The expansion wedge (4A) has a tapered section (42) tapered toward the tail end of the expansion wedge and has diameter reducing slits (43) extending from the tail end toward the head end of the tapered section (42).
Description
本発明は、壁の裏側、パイプなどのように内部や裏側に手が届かないような部材に他の部材を締結する場合に使用する片側締結可能な拡開式締結具に関するものである。
The present invention relates to an expandable fastener that can be fastened on one side and used to fasten another member to a member that does not reach the inside or the back side, such as the back side of a wall or a pipe.
従来、内部や裏側に手が届かないような部材に他の部材を締結するための締結具が提案されている。例えば、特開２０００－２２０６１６号公報に記載のブラインド型締結具は、筒状部の先端から後端に複数のスリットを有し、その後端にフランジ部が突設された本体と、頭部がフランジ部に当接されるように本体に挿通されるボルトと、このボルトの先端に螺着され、その後端面にスリットに整合する回り止め用凸部が形成されたプラグと、そのプラグの後端面と本体の先端面との少なくとも一方に形成された筒状部拡開用の案内面とを備えている（特許文献１）。
Conventionally, fasteners have been proposed for fastening other members to members that do not reach the inside or the back side. For example, a blind fastener disclosed in Japanese Patent Application Laid-Open No. 2000-220616 has a main body having a plurality of slits from the front end to the rear end of a cylindrical portion and a flange portion protruding from the rear end, and a head portion. A bolt that is inserted into the main body so as to be in contact with the flange portion, a plug that is screwed to the front end of the bolt and has a convex portion for rotation prevention that aligns with the slit on the rear end surface thereof, and a rear end surface of the plug And a guide surface for expanding the cylindrical portion formed on at least one of the front end surface of the main body (Patent Document 1).
しかしながら、特許文献１に記載された発明においては、締結固定した後であっても、振動等によってプラグが緩んでしまうおそれがある。一旦、緩んでしまったプラグは、拡開した筒状部から徐々に離隔し、その拡開状態を保持させる機能が減退してしまう。このため、締結物と被締結物との締結力が低下し、両者間にガタつきを発生させてしまうという問題がある。特に、高速道路や鉄道路線、高層ビルなど、人命事故に直結するおそれの高い箇所に使用される締結具は、品質・安全性のより高いものが要求されている。
However, in the invention described in Patent Document 1, the plug may be loosened due to vibration or the like even after being fastened and fixed. Once the plug has been loosened, it is gradually separated from the expanded cylindrical portion, and the function of maintaining the expanded state is reduced. For this reason, there exists a problem that the fastening force of a fastening thing and a to-be-fastened thing will fall, and will generate rattling between both. In particular, fasteners used in places that are likely to be directly connected to human life accidents such as highways, railway lines, and high-rise buildings are required to have higher quality and safety.
本発明は、このような問題点を解決するためになされたものであって、内部や裏側に手が届かない部材に他の部材を片側から簡単に締結できることはもとより、締結後の緩みを抑制することができる拡開式締結具を提供することを目的としている。
The present invention has been made to solve such a problem, and it is possible to easily fasten another member from one side to a member that cannot reach the inside or the back side, and to suppress looseness after fastening. It is an object to provide an expandable fastener that can be made.
本発明に係る拡開式締結具は、ボルトの雄ネジ部を挿通可能な挿通孔が形成された筒状部と、この筒状部の後端に設けられて所定の工具で把持可能なフランジ部とを有し、前記筒状部の先端から後端に向けて複数の拡開スリットが形成された筒状本体と、前記ボルトの雄ネジ部に螺合する雌ネジ部と、後端に向けて先細りに形成されたテーパ部とを有し、このテーパ部の後端から先端に向けて複数の縮径スリットが形成された拡開用ウエッジとを有している。
An expandable fastener according to the present invention includes a cylindrical portion having an insertion hole through which a male screw portion of a bolt can be inserted, and a flange that is provided at the rear end of the cylindrical portion and can be gripped by a predetermined tool. A cylindrical main body in which a plurality of expanding slits are formed from the front end to the rear end of the cylindrical portion, a female screw portion that is screwed into the male screw portion of the bolt, and a rear end And a widening wedge formed with a plurality of reduced-diameter slits from the rear end to the front end of the taper portion.
また、本発明において、前記拡開用ウエッジは、前記筒状本体の各拡開スリットに対応する位置に前記縮径スリットを形成しているとともに、これら各縮径スリットの先端部から外側方向に突出形成されており、前記拡開スリットに係合して共回りを防止する共回り防止用突出部を有していてもよい。
Further, in the present invention, the expanding wedge forms the reduced diameter slit at a position corresponding to each expanded slit of the cylindrical main body, and extends outward from the front end of each reduced diameter slit. The protrusion may be formed and may have a co-rotation preventing protrusion that engages with the expanding slit to prevent co-rotation.
さらに、本発明において、前記拡開用ウエッジは、前記テーパ部の内周面に前記雌ネジ部を有しておらず、その内径が前記雌ネジ部の谷径以上の大きさに形成されていてもよい。
Furthermore, in the present invention, the expanding wedge does not have the female screw portion on the inner peripheral surface of the tapered portion, and the inner diameter thereof is formed to be larger than the valley diameter of the female screw portion. May be.
本発明によれば、内部や裏側に手が届かない部材に他の部材を片側から簡単に締結できることはもとより、締結後の緩みを抑制することができる。
According to the present invention, it is possible not only to easily fasten another member from one side to a member that cannot reach the inside or the back side, but also to prevent looseness after fastening.
以下、本発明に係る拡開式締結具の第１実施形態について図面を用いて説明する。図１は、本第１実施形態の拡開式締結具１Ａを示す正面図である。また、図２は、（ａ）図１の左側面図、および（ｂ）拡開用ウエッジ４Ａの左側面図であり、図３は、図２の３Ａ－３Ａ線断面図である。
Hereinafter, a first embodiment of an expandable fastener according to the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an expandable fastener 1A according to the first embodiment. 2 is (a) a left side view of FIG. 1, and (b) a left side view of the expanding wedge 4A. FIG. 3 is a cross-sectional view taken along line 3A-3A of FIG.
本第１実施形態の拡開式締結具１Ａは、図１に示すように、主として、ボルト２と、このボルト２の雄ネジ部２１を挿通可能な筒状本体３と、この筒状本体３の先端部に設けられる拡開用ウエッジ４Ａとから構成されている。以下、各構成部についてより詳細に説明する。
As shown in FIG. 1, the expandable fastener 1 </ b> A according to the first embodiment mainly includes a bolt 2, a tubular body 3 that can be inserted through the male screw portion 21 of the bolt 2, and the tubular body 3. It is comprised from the wedge 4A for an expansion provided in the front-end | tip part. Hereinafter, each component will be described in more detail.
まず、筒状本体３は、図１および図３に示すように、略円筒状に形成された筒状部３１と、この筒状部３１の後端に設けられたフランジ部３２とを有している。
First, as shown in FIGS. 1 and 3, the cylindrical main body 3 has a cylindrical portion 31 formed in a substantially cylindrical shape, and a flange portion 32 provided at the rear end of the cylindrical portion 31. ing.
筒状部３１は、拡開用ウエッジ４Ａにより拡開されて締結機能を発揮するものである。本第１実施形態において、筒状部３１は、図３に示すように、ボルト２の雄ネジ部２１を挿通しうる挿通孔３３を有している。また、筒状部３１には、図１に示すように、その先端から後端に向けて複数本の拡開スリット３４が形成されている。
The cylindrical portion 31 is expanded by the expansion wedge 4A and exhibits a fastening function. In the first embodiment, the cylindrical portion 31 has an insertion hole 33 through which the male screw portion 21 of the bolt 2 can be inserted, as shown in FIG. Further, as shown in FIG. 1, a plurality of expanding slits 34 are formed in the cylindrical portion 31 from the front end to the rear end.
この拡開スリット３４は、締結物を締め付ける際に筒状部３１を拡開し易くして当該拡開部分によって強固に締結するためのものであり、本第１実施形態では、周方向に等角度間隔で４本形成されている。拡開スリット３４の数が少なすぎると、拡開抵抗が大きくなって締め付け作業の効率が低下するし、筒状部３１の拡開バランスが不均衡になって十分な締結力が得られないか、あるいは緩みやすくなってしまう。一方、拡開スリット３４の数が多すぎると、締結を保持する力が弱まってしまうし、筒状部３１が変形し易くなって締め付け作業を行う前に拡開したり閉じてしまうおそれがある。このため、本実施形態では、４本の拡開スリット３４を等角度間隔で配置している。ただし、拡開スリット３４の数や配置は、この構成に限られるものではなく、拡開のし易さ、下孔との密着性、締結強度の観点に加えて、使用箇所や筒状部３１の径の大きさ等に応じて適宜変更・選択される。
This widening slit 34 is for easily expanding the cylindrical portion 31 when tightening the fastening object and firmly tightening it with the widened portion. In the first embodiment, in the circumferential direction, etc. Four are formed at angular intervals. If the number of the expansion slits 34 is too small, the expansion resistance is increased, the efficiency of the tightening operation is lowered, and the expansion balance of the cylindrical portion 31 is unbalanced, so that a sufficient fastening force cannot be obtained. Or it becomes easy to loosen. On the other hand, when the number of the expansion slits 34 is too large, the force for holding the fastening is weakened, and the cylindrical portion 31 is easily deformed and may be expanded or closed before performing the tightening operation. . For this reason, in this embodiment, the four expansion slits 34 are arrange | positioned at equal angle intervals. However, the number and arrangement of the widening slits 34 are not limited to this configuration. In addition to the ease of widening, adhesion to the lower hole, and fastening strength, the use location and the cylindrical portion 31 are used. The diameter is appropriately changed and selected according to the size of the diameter.
また、本第１実施形態において、筒状部３１の先端部の内面には、図３に示すように、テーパ状のウエッジ案内面３５が形成されている。このウエッジ案内面３５は、ボルト２の締め付けに伴って移動する拡開用ウエッジ４Ａが、筒状本体３の内部へ圧入され易くなるように案内する役割を果たすものであり、後方に向かって内側に傾斜されている。
Further, in the first embodiment, a tapered wedge guide surface 35 is formed on the inner surface of the distal end portion of the cylindrical portion 31 as shown in FIG. The wedge guide surface 35 plays a role of guiding the expanding wedge 4A, which moves as the bolt 2 is tightened, to be easily press-fitted into the cylindrical main body 3, and is directed toward the inside. It is inclined to.
フランジ部３２は、所定の工具により把持されて、ボルト２の締め付け開始時に筒状本体３の共回りを防止する役割を果たすものである。本第１実施形態において、フランジ部３２は、図２（ａ）に示すように、周方向に等角度間隔で３つの円弧状溝３６を有しており、特殊な工具によって把持しうるようになっている。なお、このフランジ部３２の形状は、これに限られるものではなく、六角形に形成してスパナ等の一般的な工具で把持しうるようにしてもよいし、皿頭形状等に形成してもよい。
The flange portion 32 is held by a predetermined tool, and plays a role of preventing the cylindrical body 3 from rotating together when the bolt 2 starts to be tightened. In the first embodiment, as shown in FIG. 2A, the flange portion 32 has three arc-shaped grooves 36 at equal angular intervals in the circumferential direction so that it can be gripped by a special tool. It has become. The shape of the flange portion 32 is not limited to this, and it may be formed in a hexagonal shape so that it can be gripped with a general tool such as a spanner, Also good.
一方、拡開用ウエッジ４Ａは、図１から図３に示すように、筒状部３１の外径と略同径の円筒状に形成されており、ボルト２の雄ネジ部２１に螺合する雌ネジ部４１と、後端に向けて先細りに形成されたりテーパ部４２とを有している。
On the other hand, as shown in FIGS. 1 to 3, the expanding wedge 4 </ b> A is formed in a cylindrical shape having substantially the same diameter as the outer diameter of the cylindrical portion 31, and is screwed into the male screw portion 21 of the bolt 2. It has a female screw portion 41 and a tapered portion 42 that is tapered toward the rear end.
テーパ部４２は、拡開用ウエッジ４Ａを筒状部３１内に圧入し易くするとともに、締め付けが進むにつれて縮径し雄ネジに食い込んで緩み止めの機能を発揮するものである。本第１実施形態において、テーパ部４２は、図３に示すように、その尖端部の径が、挿通孔３３の内径とほぼ等しくなるように傾斜されている。また、テーパ部４２には、図１および図３に示すように、その後端から先端に向けて複数の縮径スリット４３が形成されている。
The taper portion 42 makes it easy to press-fit the expanding wedge 4A into the cylindrical portion 31, and reduces the diameter as the tightening progresses, so as to cut into the male screw and exert a function of preventing loosening. In the first embodiment, as shown in FIG. 3, the tapered portion 42 is inclined so that the diameter of the pointed portion is substantially equal to the inner diameter of the insertion hole 33. Further, as shown in FIGS. 1 and 3, the tapered portion 42 is formed with a plurality of reduced-diameter slits 43 from the rear end to the front end.
この縮径スリット４３は、テーパ部４２をより小さい力で縮径し易くするためのものである。本第１実施形態において、縮径スリット４３は、図２（ｂ）に示すように、周方向に等角度間隔で４本形成されている。縮径スリット４３の数が少なすぎると、縮径抵抗が大きくなって締め付けの作業効率が低下するし、テーパ部４２がアンバランスに縮径してしまうおそれがある。一方、縮径スリット４３の数が多すぎると、各テーパ部４２の強度が落ちてしまって軽い衝撃でも変形してしまうおそれがある。このため、本実施形態では、拡開スリット３４に合わせて４本の縮径スリット４３を等角度間隔で配置している。ただし、縮径スリット４３の数や配置は、この構成に限られるものではなく、縮径のし易さ、ボルト２への食い込み具合等の観点から適宜変更してもよい。
The diameter-reducing slit 43 is for making it easier to reduce the diameter of the tapered portion 42 with a smaller force. In the first embodiment, as shown in FIG. 2B, four diameter-reducing slits 43 are formed at equiangular intervals in the circumferential direction. If the number of the diameter-reducing slits 43 is too small, the diameter-reducing resistance is increased, the tightening work efficiency is lowered, and the taper portion 42 may be unbalanced. On the other hand, if the number of the diameter-reducing slits 43 is too large, the strength of each tapered portion 42 is lowered, and there is a possibility that it may be deformed even by a light impact. For this reason, in the present embodiment, four reduced diameter slits 43 are arranged at equal angular intervals in accordance with the widening slit 34. However, the number and arrangement of the reduced-diameter slits 43 are not limited to this configuration, and may be appropriately changed from the viewpoints of ease of reducing the diameter, the degree of biting into the bolt 2, and the like.
また、本第１実施形態において、拡開用ウエッジ４Ａは、図３に示すように、テーパ部４２の内周面に雌ネジ部４１が形成されていない。そして、この内周面の内径が、雌ネジ部４１の谷径以上の大きさに形成されている。これは、締め付けを開始すると、拡開用ウエッジ４Ａが筒状本体３内に入り込んで圧力を受け、締め付け作業が完了する前からテーパ部４２が縮径するが、直ちにボルト２の雄ネジ部２１に食い込んで止まってしまわないようにするため、雌ネジ部４１を形成していない。そして、ボルト２の雄ネジ部２１との接触抵抗を最小限に抑制しつつ締め付け作業を進め、締結作業を確実に完了させるためのものである。
In the first embodiment, the expanding wedge 4A is not formed with the female thread portion 41 on the inner peripheral surface of the tapered portion 42 as shown in FIG. The inner diameter of the inner peripheral surface is formed to be larger than the valley diameter of the female screw portion 41. When the tightening is started, the expanding wedge 4A enters the cylindrical body 3 and receives pressure, and the taper portion 42 is reduced in diameter before the tightening operation is completed. The female screw portion 41 is not formed so as not to bite into and stop. Then, the tightening operation is advanced while the contact resistance of the bolt 2 with the male screw portion 21 is minimized, and the fastening operation is completed with certainty.
なお、本第１実施形態において、ボルト２は、図２（ａ）に示すように、六角穴２２を有しており、六角レンチで締め付けるようになっている。しかしながら、ボルト２の形状は、これに限られるものではなく、汎用的な六角ボルトでもよく、十字穴を有する皿頭ボルト等でもよい。
In the first embodiment, the bolt 2 has a hexagonal hole 22 as shown in FIG. 2A, and is tightened with a hexagon wrench. However, the shape of the bolt 2 is not limited to this, and may be a general-purpose hexagon bolt, a flat head bolt having a cross hole, or the like.
つぎに、以上のような構成を備えた本第１実施形態における拡開式締結具１Ａの作用につき、図４を参照しつつ説明する。なお、図４（ｂ）では、説明の便宜上、ボルト２の雄ネジ部２１の断面のうち、略中央部近傍を一部省略して筒状本体３および拡開用ウエッジ４Ａの一部を表している。
Next, the operation of the expandable fastener 1A according to the first embodiment having the above-described configuration will be described with reference to FIG. In FIG. 4B, for convenience of explanation, in the cross section of the male threaded portion 21 of the bolt 2, a part of the cylindrical body 3 and the expanding wedge 4A are partially omitted by omitting a portion near the substantially central portion. ing.
本第１実施形態の拡開式締結具１Ａによって締結物Ｘに被締結物Ｙを締結する場合、まず、図１および図３に示すように、筒状本体３の挿通孔３３にボルト２の雄ネジ部２１を挿通し、その雄ネジ部２１の先端に拡開用ウエッジ４Ａを螺合させておく。
When the fastened object Y is fastened to the fastened object X by the expandable fastener 1A of the first embodiment, first, as shown in FIGS. 1 and 3, the bolt 2 is inserted into the insertion hole 33 of the cylindrical body 3. The male screw portion 21 is inserted, and the expanding wedge 4A is screwed to the tip of the male screw portion 21.
つぎに、図４（ａ）に示すように、締結物Ｘおよび被締結物Ｙに穿孔された下孔Ｈに拡開式締結具１Ａを挿通し、フランジ部３２を被締結物Ｙの表面に当接させた後、フランジ部３２を工具で固定しながらボルト２を六角レンチで締め付ける。このとき、固定されたフランジ部３２が筒状本体３の回転を防止するため、ボルト２の回転に従って筒状本体３が共回りすることがない。
Next, as shown in FIG. 4 (a), the expandable fastener 1 </ b> A is inserted into the prepared hole H formed in the fastening object X and the fastened object Y, and the flange portion 32 is placed on the surface of the fastened object Y. After the contact, the bolt 2 is tightened with a hexagon wrench while fixing the flange portion 32 with a tool. At this time, since the fixed flange portion 32 prevents the cylindrical body 3 from rotating, the cylindrical body 3 does not rotate together according to the rotation of the bolt 2.
また、ボルト２の締め付けに伴って、拡開用ウエッジ４Ａは図４（ａ）中の左方向に螺進する。このとき、拡開用ウエッジ４Ａのテーパ部４２が、筒状本体３のウエッジ案内面３５に沿って摺動するため、拡開用ウエッジ４Ａを挿通孔３３内へ案内しつつ圧入し易くする。
Further, as the bolt 2 is tightened, the expanding wedge 4A is screwed in the left direction in FIG. At this time, since the taper portion 42 of the expanding wedge 4A slides along the wedge guide surface 35 of the cylindrical main body 3, the expanding wedge 4A is easily pressed into the insertion hole 33 while being guided.
さらに、ボルト２を締め続けると、螺進する拡開用ウエッジ４Ａが、筒状部３１の内壁面を外方向に押圧する。これにより、図４（ｂ）に示すように、筒状部３１は拡開スリット３４に沿って複数枚に分断されて放射状に拡開される。このとき、拡開スリット３４が周方向に等角度間隔で４本設けられるため、拡開抵抗が小さく容易に締め付けられるとともに、筒状部３１がほぼ均等に拡開し、バランスのよい締結状態が得られる。
Further, when the bolt 2 is continuously tightened, the expanding wedge 4A that is screwed presses the inner wall surface of the cylindrical portion 31 outward. Thereby, as shown in FIG.4 (b), the cylindrical part 31 is divided into several sheets along the expansion slit 34, and is expanded radially. At this time, since the four expansion slits 34 are provided at equal angular intervals in the circumferential direction, the expansion resistance is small and it is easily tightened, and the cylindrical portion 31 is expanded almost uniformly and a balanced fastening state is obtained. can get.
また、このとき、筒状本体３の拡開抵抗に比べて拡開用ウエッジ４Ａの縮径抵抗の方が小さい場合、締め付け作業の途中でテーパ部４２が縮径してしまうおそれがある。しかしながら、本第１実施形態では、テーパ部４２の内周面に雌ネジ部４１がなく、その内径が雌ネジ部４１の谷径以上の大きさに形成されているため、変形当初において縮径してもその端縁部のみで雄ネジ部２１と接触する。これにより、テーパ部４２は雄ネジ部２１との接触抵抗を極めて小さく抑えられ、締結作業の途中で雄ネジ部２１への食い込みによる妨げになるのを防止する。
At this time, if the diameter reducing resistance of the expanding wedge 4A is smaller than the expanding resistance of the cylindrical body 3, the taper portion 42 may be reduced in diameter during the tightening operation. However, in the first embodiment, since there is no female screw portion 41 on the inner peripheral surface of the taper portion 42 and the inner diameter is formed to be larger than the valley diameter of the female screw portion 41, the diameter is reduced at the beginning of deformation. Even so, it contacts the male screw portion 21 only at its end edge. Thereby, the taper part 42 can suppress contact resistance with the external thread part 21 very small, and prevents it from being disturbed by the biting into the external thread part 21 in the middle of a fastening operation | work.
筒状部３１がほぼ拡開した後、さらにボルト２を強く締め付けると、拡開用ウエッジ４Ａのテーパ部４２が、筒状部３１の内壁面から内側方向への反作用を受けてさらに縮径する。これにより、テーパ部４２の端縁部は、図５（ａ）に示す略円形から、図５（ｂ）に示す擬似四角形へと変形し、ボルト２の雄ネジ部２１に深く食い込む。このため、拡開用ウエッジ４Ａは雄ネジ部２１に沿って緩む方向へも螺進し難くなり、緩み止め効果が高められる。
When the bolt 2 is further tightened after the cylindrical portion 31 is substantially expanded, the taper portion 42 of the expanding wedge 4A is further reduced in diameter due to the reaction inward from the inner wall surface of the cylindrical portion 31. . Thereby, the edge part of the taper part 42 deform | transforms from the substantially circular shape shown to Fig.5 (a) to the pseudo | quasi-rectangular shape shown in FIG.5 (b), and it bites into the external thread part 21 of the volt | bolt 2 deeply. For this reason, it becomes difficult for the expanding wedge 4A to be screwed in the loosening direction along the male threaded portion 21, and the loosening prevention effect is enhanced.
以上の工程を経て、締結物Ｘと被締結物Ｙは、フランジ部３２と拡開された筒状部３１との間に狭持された状態で強固に締結される。
Through the above steps, the fastening object X and the fastened object Y are firmly fastened while being sandwiched between the flange part 32 and the expanded cylindrical part 31.
以上のような本第１実施形態によれば、以下のような効果を奏する。
１．内部や裏側に手が届かない部材であっても片側からの作業だけで他の部材を簡単に締結することができる。
２．拡開用ウエッジ４Ａをボルト２の雄ネジ部２１に食い込ませることによって緩み難くし、より強い締結状態を保持することができる。
３．拡開用ウエッジ４Ａが縮径し始めてもすぐに雄ネジ部２１に食い込ませるのではなく、締め付け作業の完了時点で食い込むように調整されており、締結作業をスムーズに完了することができる。 According to the first embodiment as described above, the following effects can be obtained.
1. Even if it is a member which cannot reach the inside or the back side, other members can be easily fastened only by work from one side.
2. By entraining the expandingwedge 4A into the male threaded portion 21 of the bolt 2, it becomes difficult to loosen and a stronger fastening state can be maintained.
3. Even if the expandingwedge 4A starts to reduce in diameter, it is adjusted so that it does not bite into the male screw portion 21 immediately but at the time of completion of the fastening operation, and the fastening operation can be completed smoothly.
１．内部や裏側に手が届かない部材であっても片側からの作業だけで他の部材を簡単に締結することができる。
２．拡開用ウエッジ４Ａをボルト２の雄ネジ部２１に食い込ませることによって緩み難くし、より強い締結状態を保持することができる。
３．拡開用ウエッジ４Ａが縮径し始めてもすぐに雄ネジ部２１に食い込ませるのではなく、締め付け作業の完了時点で食い込むように調整されており、締結作業をスムーズに完了することができる。 According to the first embodiment as described above, the following effects can be obtained.
1. Even if it is a member which cannot reach the inside or the back side, other members can be easily fastened only by work from one side.
2. By entraining the expanding
3. Even if the expanding
つぎに、本発明に係る拡開式締結具１Ｂの第２実施形態について図面を参照しつつ説明する。なお、上述した第１実施形態の構成と同等または相当する構成については同一の符号を付し、再度の説明を省略する。
Next, a second embodiment of the expandable fastener 1B according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the structure equivalent to the structure of 1st Embodiment mentioned above, or it abbreviate | omits description.
本第２実施形態の拡開式締結具１Ｂの特徴は、第１実施形態の構成に加え、図６および図７に示すように、拡開用ウエッジ４Ｂが、ボルト２との共回りを防止するための共回り防止用突出部４４を有している点にある。
The feature of the expandable fastener 1B of the second embodiment is that, in addition to the configuration of the first embodiment, the expanding wedge 4B prevents co-rotation with the bolt 2 as shown in FIGS. It is in the point which has the protrusion part 44 for co-rotation prevention for doing.
この共回り防止用突出部４４は、筒状本体３の拡開スリット３４に係合し、ボルト２が回転されたときに拡開用ウエッジ４Ｂが共回りしてしまうのを防止するものである。本第２実施形態において、拡開用ウエッジ４Ｂには、筒状本体３に形成された各拡開スリット３４に対応する位置に縮径スリット４３がそれぞれ形成されている。そして、各縮径スリット４３の先端部から外側方向に、各共回り防止用突出部４４が突出形成されている。つまり、共回り防止用突出部４４は、拡開スリット３４に対応する位置に形成されている。
The co-rotation preventing protrusion 44 engages with the expansion slit 34 of the cylindrical body 3 and prevents the expansion wedge 4B from co-rotating when the bolt 2 is rotated. . In the second embodiment, the expanding wedge 4B is formed with reduced diameter slits 43 at positions corresponding to the expanding slits 34 formed in the cylindrical main body 3. Further, each co-rotation preventing projection 44 is formed so as to project outward from the tip of each reduced diameter slit 43. That is, the common rotation preventing projection 44 is formed at a position corresponding to the widening slit 34.
また、本第２実施形態において、拡開用ウエッジ４Ｂを製造する場合、テーパ部４２において縮径スリット４３を形成するために周方向に等角度間隔で隔てられた４箇所をプレス加工によって外側方向に折り曲げるようにして塑性変形させる。これにより、共回り防止用突出部４４が放射状に形成されると同時に、これら共回り防止用突出部４４の形状に対応した縮径スリット４３がテーパ部４２に形成されるため、製造効率が向上する。
Further, in the second embodiment, when the expanding wedge 4B is manufactured, the four portions separated at equal angular intervals in the circumferential direction in order to form the reduced diameter slit 43 in the tapered portion 42 are subjected to the outer direction by pressing. It is plastically deformed by bending it. As a result, the co-rotation preventing protrusions 44 are formed radially, and at the same time, the diameter-reduced slits 43 corresponding to the shapes of the co-rotation prevention protrusions 44 are formed in the taper portion 42, thereby improving the manufacturing efficiency. To do.
以上のような本第２実施形態の拡開式締結具１Ｂによって締結物Ｘと被締結物Ｙとを締結する場合、まず、図８に示すように、筒状本体３の挿通孔３３にボルト２の雄ネジ部２１を挿通し、その雄ネジ部２１の先端に拡開用ウエッジ４Ｂを螺合させておく。このとき、共回り防止用突出部４４のそれぞれを拡開スリット３４内に進入させる。
When the fastening object X and the fastened object Y are fastened by the expandable fastener 1B of the second embodiment as described above, first, bolts are inserted into the insertion holes 33 of the cylindrical main body 3 as shown in FIG. Two male screw portions 21 are inserted, and the expanding wedge 4 </ b> B is screwed to the tip of the male screw portion 21. At this time, each of the co-rotation preventing protrusions 44 is caused to enter the expansion slit 34.
つぎに、図９（ａ）に示すように、拡開式締結具１Ｂを下孔Ｈに挿通した後、フランジ部３２を工具で固定しながらボルト２を六角レンチで締め付ける。このとき、ボルト２の締め付けに伴って、拡開用ウエッジ４Ｂに回転力が付与されるが、各共回り防止用突出部４４が拡開スリット３４に当接する。これにより、拡開用ウエッジ４Ｂは、ボルト２の締め付けに伴う共回りを防止され、そのまま螺進する。
Next, as shown in FIG. 9A, after the expansive fastener 1B is inserted through the pilot hole H, the bolt 2 is tightened with a hexagon wrench while fixing the flange portion 32 with a tool. At this time, as the bolt 2 is tightened, a rotational force is applied to the expanding wedge 4 </ b> B, but each co-rotation preventing projection 44 abuts the expanding slit 34. Thereby, the expanding wedge 4B is prevented from co-rotation accompanying the tightening of the bolt 2 and is screwed as it is.
その後、第１実施形態と同様、拡開用ウエッジ４Ｂが図９（ａ）中の左方向に螺進すると、筒状部３１の内壁面を外方向に押圧する。これにより、拡開用ウエッジ４Ｂは、図９（ｂ）に示すように、筒状部３１を拡開スリット３４に沿って複数枚に分断し放射状に拡開する。また、テーパ部４２は、雌ネジ部４１を備えていないため、締め付けの途中で縮径しても直ちに雄ネジ部２１に食い込むことがなく、ボルト２との接触抵抗を低減し、締め付け作業の妨げとなるのを防止する。
Thereafter, as in the first embodiment, when the expanding wedge 4B is screwed in the left direction in FIG. 9A, the inner wall surface of the cylindrical portion 31 is pressed outward. As a result, as shown in FIG. 9B, the expanding wedge 4B divides the cylindrical portion 31 into a plurality of pieces along the expanding slit 34 and expands radially. Further, since the taper portion 42 does not include the female screw portion 41, even if the diameter is reduced during tightening, the taper portion 42 does not immediately bite into the male screw portion 21, reducing the contact resistance with the bolt 2, and tightening work. Prevent obstruction.
そして、筒状部３１がほぼ拡開した後、さらにボルト２を強く締め付けると、拡開用ウエッジ４Ｂのテーパ部４２が完全に縮径し、その端縁部をボルト２の雄ネジ部２１に深く食い込ませる。これにより、拡開用ウエッジ４Ｂは雄ネジ部２１に沿って進退方向いずれにも螺進し難くなり、より効果的な緩み止め効果が得られる。
When the bolt 2 is further tightened after the tubular portion 31 is substantially expanded, the taper portion 42 of the expanding wedge 4B is completely reduced in diameter, and its end edge portion is connected to the male screw portion 21 of the bolt 2. Encroach deeply. As a result, the expanding wedge 4B is less likely to be screwed in any of the forward and backward directions along the male screw portion 21, and a more effective loosening prevention effect can be obtained.
また、本第２実施形態では、拡開スリット３４に対応する位置に共回り防止用突出部４４および縮径スリット４３が設けられている。このため、縮径スリット４３で分断されたテーパ部４２のそれぞれが、拡開スリット３４で分断された筒状部３１のそれぞれと対向する。これにより、分断された各テーパ部４２は、分断された各筒状部３１の内壁面全体から反作用を受けて均等に縮径し、より緩み止め効果を向上することが可能となる。
In the second embodiment, the co-rotation preventing protrusion 44 and the reduced diameter slit 43 are provided at a position corresponding to the expansion slit 34. For this reason, each of the tapered portions 42 divided by the reduced diameter slit 43 faces each of the cylindrical portions 31 divided by the expanding slit 34. Thereby, each divided taper portion 42 receives a reaction from the entire inner wall surface of each divided cylindrical portion 31 and is uniformly reduced in diameter, thereby further improving the loosening prevention effect.
以上の工程を経て、締結物Ｘと被締結物Ｙは、フランジ部３２と拡開された筒状部３１との間に狭持された状態で強固に締結される。
Through the above steps, the fastening object X and the fastened object Y are firmly fastened while being sandwiched between the flange part 32 and the expanded cylindrical part 31.
以上のような本第２実施形態によれば、第１実施形態の効果に加えて、拡開用ウエッジ４Ｂの共回りをより確実に防止し、締め付け作業の効率を向上することができるという効果を奏する。
According to the second embodiment as described above, in addition to the effects of the first embodiment, the co-rotation of the expanding wedge 4B can be more reliably prevented, and the efficiency of the tightening operation can be improved. Play.
なお、本発明に係る拡開式締結具は、上述した各実施形態に限定されるものではなく、適宜変更することができる。
Note that the expandable fastener according to the present invention is not limited to the above-described embodiments, and can be appropriately changed.
例えば、上述した各実施形態では、拡開用ウエッジ４Ａ，４Ｂにおいて、テーパ部４２の内周面に雌ネジ部４１を設けないことで、締め付け途中で縮径しても、雄ネジ部２１との抵抗を極力小さく抑えるようになっているが、この構成に限られるものではない。例えば、筒状本体３の拡開抵抗と拡開用ウエッジ４Ａ，４Ｂの縮径抵抗とを予め計測し、締め付けの途中でテーパ部４２が縮径しないように強度設計した拡開用ウエッジ４Ａ，４Ｂであれば、内周面全体に雌ネジ部４１を形成してもよい。
For example, in each of the above-described embodiments, in the expanding wedges 4A and 4B, by not providing the female screw portion 41 on the inner peripheral surface of the taper portion 42, even if the diameter is reduced during tightening, However, the present invention is not limited to this configuration. For example, the expansion resistance 4A, the expansion resistance of the cylindrical body 3 and the diameter reduction resistance of the expansion wedges 4A, 4B are measured in advance, and the strength is designed so that the taper portion 42 does not reduce the diameter during tightening. If it is 4B, you may form the internal thread part 41 in the whole internal peripheral surface.
また、上述した各実施形態では、筒状本体３の拡開スリット３４と、拡開用ウエッジ４Ａ，４Ｂの縮径スリット４３とを同数に揃えることで、締結時のバランスを向上させているが、これに限られるものではなく、拡開抵抗や縮径抵抗を調整する目的や使用場所等に応じて適宜異なる数で形成するようにしてもよい。
Moreover, in each embodiment mentioned above, although the expansion slit 34 of the cylindrical main body 3 and the diameter-reduction slit 43 of the expansion wedges 4A and 4B are arranged in the same number, the balance at the time of fastening is improved. However, the present invention is not limited to this, and a different number may be appropriately formed according to the purpose of adjusting the expansion resistance and the diameter reduction resistance, the place of use, and the like.
１Ａ，１Ｂ 拡開式締結具
２ ボルト
３ 筒状本体
４Ａ，４Ｂ 拡開用ウエッジ
２１ 雄ネジ部
２２ 六角穴
３１ 筒状部
３２ フランジ部
３３ 挿通孔
３４ 拡開スリット
３５ ウエッジ案内面
３６ 円弧状溝
４１ 雌ネジ部
４２ テーパ部
４３ 縮径スリット
４４ 共回り防止用突出部
Ｘ 締結物
Ｙ 被締結物
Ｈ 下孔 1A,1B Expandable fastener 2 Bolt 3 Tubular body 4A, 4B Expanding wedge 21 Male thread portion 22 Hexagonal hole 31 Cylindrical portion 32 Flange portion 33 Insertion hole 34 Expanding slit 35 Wedge guide surface 36 Arc-shaped groove 41 Female thread part 42 Taper part 43 Reduced diameter slit 44 Co-rotation preventing protrusion X Fastening object Y Fastening object H Pilot hole
２ ボルト
３ 筒状本体
４Ａ，４Ｂ 拡開用ウエッジ
２１ 雄ネジ部
２２ 六角穴
３１ 筒状部
３２ フランジ部
３３ 挿通孔
３４ 拡開スリット
３５ ウエッジ案内面
３６ 円弧状溝
４１ 雌ネジ部
４２ テーパ部
４３ 縮径スリット
４４ 共回り防止用突出部
Ｘ 締結物
Ｙ 被締結物
Ｈ 下孔 1A,
Claims (3)
- ボルトの雄ネジ部を挿通可能な挿通孔が形成された筒状部と、この筒状部の後端に設けられて所定の工具で把持可能なフランジ部とを有し、前記筒状部の先端から後端に向けて複数の拡開スリットが形成された筒状本体と、
前記ボルトの雄ネジ部に螺合する雌ネジ部と、後端に向けて先細りに形成されたテーパ部とを有し、このテーパ部の後端から先端に向けて複数の縮径スリットが形成された拡開用ウエッジと
を有している拡開式締結具。 A cylindrical portion formed with an insertion hole through which the male threaded portion of the bolt can be inserted, and a flange portion provided at the rear end of the cylindrical portion and gripped by a predetermined tool; A cylindrical body in which a plurality of expanding slits are formed from the front end toward the rear end;
It has a female threaded portion that is screwed into the male threaded portion of the bolt and a tapered portion that is tapered toward the rear end, and a plurality of reduced diameter slits are formed from the rear end to the front end of the tapered portion. An expandable fastener having an expanded wedge. - 請求項１において、前記拡開用ウエッジは、前記筒状本体の各拡開スリットに対応する位置に前記縮径スリットを形成しているとともに、これら各縮径スリットの先端部から外側方向に突出形成されており、前記拡開スリットに係合して共回りを防止する共回り防止用突出部を有している拡開式締結具。 2. The expansion wedge according to claim 1, wherein the diameter reducing slit is formed at a position corresponding to each expansion slit of the cylindrical main body, and protrudes outward from a tip portion of each diameter reducing slit. An expansion-type fastener having a co-rotation prevention protrusion that is formed and engages with the expansion slit to prevent co-rotation.
- 請求項１または請求項２において、前記拡開用ウエッジは、前記テーパ部の内周面に前記雌ネジ部を有しておらず、その内径が前記雌ネジ部の谷径以上の大きさに形成されている拡開式締結具。 3. The expanding wedge according to claim 1, wherein the expanding wedge does not have the female screw portion on an inner peripheral surface of the tapered portion, and an inner diameter thereof is larger than a valley diameter of the female screw portion. Expandable fastener formed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2008/071141 WO2010058474A1 (en) | 2008-11-20 | 2008-11-20 | Expansion fastener |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2018527532A (en) * | 2015-11-17 | 2018-09-20 | アーコニック インコーポレイテッドＡｒｃｏｎｉｃ Ｉｎｃ． | Blind fastener |
| CN108817796A (en) * | 2018-06-27 | 2018-11-16 | 温州盛禾机械科技有限公司 | Board shaft concentricity positioning tooling fixture and its welding procedure |
| CN110421311A (en) * | 2019-08-14 | 2019-11-08 | 长沙华恒机器人系统有限公司 | A kind of welding tooling, automatic assembly welding device |
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|---|---|---|---|---|
| JPS52133463A (en) * | 1976-04-29 | 1977-11-08 | Itt | Bolt anchor |
| JPS54159553A (en) * | 1978-06-05 | 1979-12-17 | Williams Chester Clarke | Mine bolt and its fitting method |
| JP2000220616A (en) * | 1999-01-29 | 2000-08-08 | Japan Drive-It Co Ltd | Blind type fastener |
-
2008
- 2008-11-20 WO PCT/JP2008/071141 patent/WO2010058474A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52133463A (en) * | 1976-04-29 | 1977-11-08 | Itt | Bolt anchor |
| JPS54159553A (en) * | 1978-06-05 | 1979-12-17 | Williams Chester Clarke | Mine bolt and its fitting method |
| JP2000220616A (en) * | 1999-01-29 | 2000-08-08 | Japan Drive-It Co Ltd | Blind type fastener |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018527532A (en) * | 2015-11-17 | 2018-09-20 | アーコニック インコーポレイテッドＡｒｃｏｎｉｃ Ｉｎｃ． | Blind fastener |
| CN108817796A (en) * | 2018-06-27 | 2018-11-16 | 温州盛禾机械科技有限公司 | Board shaft concentricity positioning tooling fixture and its welding procedure |
| CN110421311A (en) * | 2019-08-14 | 2019-11-08 | 长沙华恒机器人系统有限公司 | A kind of welding tooling, automatic assembly welding device |
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