JP2003214463A - Idle rotation structure of cylindrical members - Google Patents
Idle rotation structure of cylindrical membersInfo
- Publication number
- JP2003214463A JP2003214463A JP2002011862A JP2002011862A JP2003214463A JP 2003214463 A JP2003214463 A JP 2003214463A JP 2002011862 A JP2002011862 A JP 2002011862A JP 2002011862 A JP2002011862 A JP 2002011862A JP 2003214463 A JP2003214463 A JP 2003214463A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical
- hole
- cylindrical member
- screwed
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、円筒状部材の空
転構造に関し、更に詳細には、同軸的に配設した2つの
円筒状部材を当接させて常には一体的に回転可能とする
と共に、一方の円筒状部材に所定の回転トルクが加わっ
た際に、該円筒状部材が他方の円筒状部材に対して空転
し得るよう構成した空転構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an idling structure of a cylindrical member, more specifically, two cylindrical members disposed coaxially are brought into contact with each other so that they can always rotate integrally. The present invention relates to an idling structure configured such that when a predetermined rotational torque is applied to one cylindrical member, the cylindrical member can idle with respect to the other cylindrical member.
【0002】[0002]
【従来の技術】例えば、図8に示すように、回転切削工
具の一つである丸鋸56は、丸鋸盤に備えた回転軸30
に挿通された後、該丸鋸56を2つのフランジ58,5
8で両側から同軸的に挟持した後、一方のフランジ56
をナット10で締め付けることで該回転軸30に対する
確実な固定が行なわれる。この場合に、前記ナット10
の締め付け力に関する規制は特にないので、作業者はス
パナ等の工具を使用して締め付けると共に、長年の勘に
より適切な値で該締め付けを停止させるようになってい
る。2. Description of the Related Art For example, as shown in FIG. 8, a circular saw 56, which is one of rotary cutting tools, has a rotary shaft 30 provided in a circular saw machine.
After the circular saw 56 is inserted into the two flanges 58, 5
After coaxially clamping it from both sides with 8, one flange 56
By tightening the nut with the nut 10, the rotation shaft 30 is securely fixed. In this case, the nut 10
Since there is no particular restriction on the tightening force, the worker tightens using a tool such as a wrench and stops the tightening at an appropriate value after long-term intuition.
【0003】[0003]
【発明が解決しようとする課題】しかし前記ナットの締
め付け作業に際し作業者が熟練していないと、該ナット
を過剰に締め付けてしまい、回転軸の雄ネジ部やスパナ
等の工具を損傷したりする不都合がある。また回転切削
工具の種類や用途によっては、過剰な締め付けによって
該工具が変形その他の現象を呈し、本来の切削性能が充
分に発揮されない場合がある。例えば、本件出願人の出
願に係る発明「丸鋸およびその主軸取付け方法」(特願2
001−101900号)では、回転切削工具として丸
鋸を想定したとき、切削作業中における丸鋸本体の膨張
収縮に伴なう半径方向への微小な拡大・縮小移動を許容
し得るように、前記ナットの締め付けを調節することが
必要である。そして、仮に前記の如き微小移動を許容し
ない締め付けがなされていると、丸鋸本来の性能を充分
に引き出し得ない難点がある。However, if the operator is not skilled in tightening the nut, the nut will be excessively tightened, and tools such as the male screw portion of the rotary shaft and the spanner may be damaged. There is inconvenience. Depending on the type and application of the rotary cutting tool, excessive tightening may cause the tool to deform and other phenomena, and the original cutting performance may not be sufficiently exhibited. For example, the invention of the applicant's application “circular saw and its spindle mounting method” (Japanese Patent Application No.
001-101900), when a circular saw is assumed as a rotary cutting tool, it is possible to allow a minute expansion / contraction movement in the radial direction accompanying the expansion / contraction of the circular saw body during the cutting work. It is necessary to adjust the tightening of the nut. If the tightening that does not allow the minute movement as described above is performed, there is a problem that the original performance of the circular saw cannot be sufficiently obtained.
【0004】また、例えば回転切削工具として木工用鉋
胴の如きシリンダ状の切削ブロックを想定すると、この
場合は切削ブロックのボス面が軸孔に対し正しい直角を
保持していることが重要である。しかし前記ボス面が軸
孔に対し正規の直角度が確保されていないと、前記切削
ブロックを回転軸に挿入した後に、該主軸に螺挿したナ
ットを過剰に締め付けた場合、この回転主軸の軸線が微
小ではあるが変形して切削精度に悪影響を及ぼす難点が
指摘される。Further, assuming a cylinder-shaped cutting block such as a wood carving barrel as the rotary cutting tool, in this case, it is important that the boss surface of the cutting block maintains a right angle with respect to the shaft hole. . However, if the boss surface does not have a regular right angle with respect to the shaft hole, when the cutting block is inserted into the rotary shaft and the nut screwed into the main shaft is excessively tightened, the axis line of the rotary main shaft is It is pointed out that although it is minute, it deforms and adversely affects the cutting accuracy.
【0005】[0005]
【発明の目的】本発明は、前述した従来技術に内在して
いる欠点に鑑み、これを好適に解決するべく提案された
ものであって、例えば丸鋸のような回転切削工具を回転
軸に挿着する際の締め付けナットとして好適に使用し得
る円筒状部材の空転構造を提供することを目的とする。
すなわち、同軸的に設けた2つの円筒状部材の一方に回
転方向への締め付けトルクを付与すると、最初は両円筒
状部材が一体的に回転するが、該締め付けトルクが所要
の値を超えると他方の部材に対して前記一方の部材が空
転するので、その空転直前のトルクを適正に予め設定し
ておくことで、前記ナット等の過剰締め付けを防止し得
る手段が提供される。SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned drawbacks inherent in the prior art, and a rotary cutting tool such as a circular saw is used as a rotary shaft. An object of the present invention is to provide a cylindrical member idling structure that can be suitably used as a tightening nut for insertion and attachment.
That is, when a tightening torque in the rotation direction is applied to one of the two coaxially provided cylindrical members, both the cylindrical members initially rotate integrally, but when the tightening torque exceeds a required value, the other Since one of the members rotates idly with respect to the member, a means for preventing the excessive tightening of the nut or the like is provided by appropriately presetting the torque immediately before the idling.
【0006】[0006]
【課題を解決するための手段】前記課題を克服し、所期
の目的を達成するため本発明に係る円筒状部材の空転構
造は、円筒状外側部材の内周面に円筒状内側部材を同軸
的かつ回転自在に配設し、弾性体の弾発力を利用した摩
擦力を両円筒状部材の間に作用させることで、前記何れ
か一方の円筒状部材を回転させた際に他方の円筒状部材
も一体的に回転させ、前記弾性体の弾発力の調節により
前記摩擦力の調節を行なって、前記何れか一方の円筒状
部材に所定値を越えた回転トルクが加わった際に、当該
一方の円筒状部材が他方の円筒状部材に対し空転するの
を許容するよう構成したことを特徴とする。この場合に
前記弾性体による摩擦力は、前記何れか一方の円筒状部
材から他方の円筒状部材へ軸方向に作用させるのが好ま
しい。また前記円筒状内側部材の中心通孔に雌ネジ部を
螺設しておき、回転軸の外周に螺設した雄ネジ部を前記
雌ネジ部を設けた中心通孔に螺挿することが好ましい。SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and to achieve the intended purpose, the idling structure of a cylindrical member according to the present invention has a cylindrical inner member coaxial with an inner peripheral surface of a cylindrical outer member. And rotatably arranged, and by applying a frictional force using the elastic force of the elastic body between both cylindrical members, when one of the cylindrical members is rotated, the other cylindrical member is rotated. The member is also integrally rotated, the frictional force is adjusted by adjusting the elastic force of the elastic body, and when a rotational torque exceeding a predetermined value is applied to any one of the cylindrical members, The one cylindrical member is configured to allow the other cylindrical member to idle. In this case, it is preferable that the frictional force generated by the elastic body is applied axially from any one of the cylindrical members to the other cylindrical member. Further, it is preferable that a female screw portion is screwed in the central through hole of the cylindrical inner member, and a male screw portion screwed on the outer circumference of the rotary shaft is screwed into the central through hole provided with the female screw portion. .
【0007】[0007]
【好適な実施形態】次に、本発明に係る円筒状部材の空
転構造につき、好適な実施例を挙げて、添付図面を参照
しながら以下説明する。なお円筒状部材の空転構造に関
する実施例としては、回転切削工具の一つである丸鋸を
回転軸に固定する際に使用されるナットを例示するが、
本発明はこれに限定されるものではない。すなわち、一
方の円筒状部材に回転トルクを加えた際に他方の円筒状
部材もあるトルク値までは一体的に回転し、所要の限界
トルク値に達すると前記一方の円筒状部材が他方の円筒
状部材に対して空転する必要のある用途であれば、全て
に亘り好適に使用し得るものである。BEST MODE FOR CARRYING OUT THE INVENTION Next, the idling structure of a cylindrical member according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. As an example of the idling structure of the cylindrical member, a nut used when fixing the circular saw, which is one of the rotary cutting tools, to the rotary shaft is exemplified.
The present invention is not limited to this. That is, when a rotational torque is applied to one cylindrical member, the other cylindrical member also rotates integrally up to a certain torque value, and when the required limit torque value is reached, the one cylindrical member causes the other cylindrical member to rotate. It can be suitably used in all applications where it is necessary to idle the member.
【0008】図1は、実施例に係る円筒状部材の空転構
造であるナットを分解して示す斜視図、図2は図1より
左側に視点を移すと共に、該ナットを180度回転させ
た状態で示す分解斜視図である。また図3は円筒状部材
の空転構造たるナットの側面図で、中心線から下方を切
断面で示している。更に図4は図3の4−4線断面図、
図5は図3の5−5線断面図である。FIG. 1 is an exploded perspective view showing a nut having a cylindrical member idling structure according to an embodiment, and FIG. 2 is a state in which the viewpoint is moved to the left side of FIG. 1 and the nut is rotated 180 degrees. It is an exploded perspective view shown by. Further, FIG. 3 is a side view of a nut which is an idling structure of a cylindrical member, and shows a lower part from a center line by a cut surface. 4 is a sectional view taken along line 4-4 of FIG.
5 is a sectional view taken along line 5-5 of FIG.
【0009】図1および図2に実施例として示すナット
10は、鉄系の金属を切削加工して得た円筒状外側部材
12と、同じく鉄系の金属を切削加工して得た円筒状内
側部材14と、前記円筒状外側部材12に固定されて、
前記円筒状内側部材14の内側に介在する2つの円弧状
ブロック16,16と、夫々の円弧状ブロック16に軸
方向から挿入され、例えばコイルバネ48の如き弾性体
の弾発力により拡大ヘッド18aを前記円筒状外側部材
12の内面に接離自在に当接させるヘッド付きピン18
とから基本的に構成される。A nut 10 shown as an embodiment in FIGS. 1 and 2 is a cylindrical outer member 12 obtained by cutting an iron-based metal, and a cylindrical inner member obtained by similarly cutting an iron-based metal. Fixed to the member 14 and the cylindrical outer member 12,
Two arc-shaped blocks 16 and 16 interposed inside the cylindrical inner member 14 and axially inserted into each of the arc-shaped blocks 16, for example, the expansion head 18a by elastic force of an elastic body such as a coil spring 48. A pin 18 with a head that comes into contact with and separates from the inner surface of the cylindrical outer member 12
Basically consists of and.
【0010】(円筒状外側部材について)前記円筒状外側
部材12は、軸方向への所要の長さと所要の厚みとを有
する円筒体として構成され、図4および図5に示すよう
に、中心軸を挟んで180度対向する内周面の2個所に
断面コ字状をなす凹溝20,20が凹設されている。前
記凹溝20,20の夫々には図1に示す如き固定片17
が介装され、これにより円弧状ブロック16の取付けを
なし得るようになっている(後述)。また円筒状外側部材
12の外周面には、前記凹溝20の夫々と対応する個所
に皿孔22が穿設され、該皿孔22に挿入した皿ネジ2
4により前記固定片16の固定をなし得るようになって
いる。更に図1、図2および図4から判明する如く、円
筒状外側部材12の外周に沿って中心角90度の間隔
で、合計4つの通孔26が半径方向に穿設されている。
これらの通孔26は、前記ナット10の回転締め付けを
行なう際に、作業者が引掛けピン付きスパナ(図示せず)
のピンを挿入する用途に供される。(Regarding Cylindrical Outer Member) The cylindrical outer member 12 is constructed as a cylindrical body having a required axial length and a required thickness, and as shown in FIGS. Two concave grooves 20, 20 having a U-shaped cross section are provided at two positions on the inner peripheral surface opposed to each other by 180 degrees. A fixing piece 17 as shown in FIG. 1 is provided in each of the grooves 20, 20.
Is provided so that the arc-shaped block 16 can be attached (described later). A countersunk hole 22 is formed in the outer peripheral surface of the cylindrical outer member 12 at a position corresponding to each of the recessed grooves 20, and a countersunk screw 2 inserted into the countersunk hole 22.
4, the fixing piece 16 can be fixed. Further, as can be seen from FIGS. 1, 2 and 4, a total of four through holes 26 are radially formed along the outer periphery of the cylindrical outer member 12 at intervals of a central angle of 90 degrees.
These through holes 26 are provided by a worker with a spanner (not shown) having a hook pin when the nut 10 is rotationally tightened.
It is used for inserting pins.
【0011】(円筒状内側部材について)円筒状内側部材
14は、図1、図2および図3から判明するように、円
筒状部材の周方向に所要幅の円周溝14aが形成される
と共に、該円周溝14aの両側に2つのフランジ14
b,14cを設けたリール状部材として構成される。前
記一方のフランジ14bは、他方のフランジ14cに対
して軸方向の厚みが大きくなるよう設定されている。ま
た円筒状内側部材14は所要径の中心通孔を有し、該中
心通孔には軸方向に雌ネジ孔28が螺設されている。こ
の雌ネジ孔28は、後述する丸鋸盤の回転軸30の軸端
付近に螺設した雄ネジ部32にネジ込み可能となってい
る。なお円筒状内側部材14における2つのフランジ1
4b,14cの外径は、図3に示すように、前記円筒状
外側部材12の内径より僅かに小さくなるよう設定さ
れ、従って該円筒状内側部材14は円筒状外側部材12
の内周面へ左右何れからも軸方向に挿脱自在となってい
る(Regarding Cylindrical Inner Member) The cylindrical inner member 14 is formed with a circumferential groove 14a having a required width in the circumferential direction of the cylindrical member, as can be seen from FIGS. 1, 2 and 3. , Two flanges 14 on both sides of the circumferential groove 14a
It is configured as a reel-shaped member provided with b and 14c. The one flange 14b is set to have a greater axial thickness than the other flange 14c. Further, the cylindrical inner member 14 has a center through hole having a required diameter, and a female screw hole 28 is screwed in the center through hole in the axial direction. The female screw hole 28 can be screwed into a male screw portion 32 screwed near a shaft end of a rotary shaft 30 of a circular saw machine to be described later. The two flanges 1 of the cylindrical inner member 14
The outer diameters of 4b and 14c are set to be slightly smaller than the inner diameter of the cylindrical outer member 12 as shown in FIG.
Can be axially inserted and removed from either the left or right side of the inner peripheral surface of
【0012】円筒状内側部材14における一方のフラン
ジ14c(薄手の方)の開放端には、後述する六角レンチ
の挿入を許容する挿入孔34が所要中心角で複数個(実
施例では6個)穿設されている。この挿入孔34の配設
間隔は、後述の円弧状ブロック16に穿設される有底孔
50の配設間隔に合致するようになっている。また他方
のフランジ14b(厚手の方)の周方向外面には、殊に図
5に示すように、円筒状内側部材14の中心通孔をなす
前記雌ネジ孔28と接線方向から一部連通する所要径の
段付孔38が穿設されている。すなわち前記段付孔38
は、大径の長尺孔38aおよび小径の短尺孔38bから
なり、その内の大径長尺孔38aの一部が前記雌ネジ孔
28に連通している。そして前記大径長尺孔38aに、
図1および図2に示す係合スリーブ(係合部材)40およ
び該スリーブ40に挿通した取付けボルト42が挿入さ
れ、該係合スリーブ40の他端から延出する該取付けボ
ルト42の端部近傍が、前記短尺孔38b(内周面に雌
ネジが螺設されている)にネジ込み固定されるようにな
っている。At the open end of the one flange 14c (thin side) of the cylindrical inner member 14, there are a plurality of insertion holes 34 (six in the embodiment) having a required center angle for allowing the insertion of a hexagon wrench described later. Has been drilled. The intervals of the insertion holes 34 match the intervals of the bottomed holes 50 formed in the arc-shaped block 16 described later. Further, in particular, as shown in FIG. 5, the outer circumferential surface of the other flange 14b (thicker side) is partially communicated with the female screw hole 28 forming the central through hole of the cylindrical inner member 14 in the tangential direction. A stepped hole 38 having a required diameter is formed. That is, the stepped hole 38
Comprises a large diameter long hole 38a and a small diameter short hole 38b, and a part of the large diameter long hole 38a communicates with the female screw hole 28. Then, in the large diameter long hole 38a,
The vicinity of the end portion of the mounting bolt 42 shown in FIGS. 1 and 2 into which the engagement sleeve (engagement member) 40 and the mounting bolt 42 inserted into the sleeve 40 are inserted and which extends from the other end of the engagement sleeve 40. However, it is adapted to be screwed and fixed in the short hole 38b (a female screw is screwed on the inner peripheral surface).
【0013】すなわち係合スリーブ40の外側には、軸
方向において部分的に肉薄となるよう切欠いた段差部4
0aが形成され、該スリーブ40を前記段付孔38の長
尺孔38aへ挿入した際に、この肉薄面40aが円筒状
内側部材14の雌ネジ孔28に臨むようになっている。
取付けボルト42の頭部径は、前記大径長尺孔38aの
内径より小さく設定され、該頭部を長尺孔38aへ完全
に埋没させ得るようになっている。また取付けボルト4
2を係合スリーブ40の通孔へ挿入した際に、該スリー
ブ40の他端部から延出するボルト端部を図示のEリン
グ44で係止することで、該ボルト42からの該スリー
ブ40の脱落防止が図られている。なお前記係合スリー
ブ40は、前記ナット10を図8に示す回転軸30に装
着して所要の締め付けが完了するまでは前記段付孔38
へ緩めに挿入されている。そして前記締付けが完了した
後に、前記取付けボルト42を前記段付孔38における
小径短尺孔38bへ更にネジ込むと、係合スリーブ40
の段差部40aが前記回転軸30の雄ネジ部32に当接
し、従って回転軸30に対するナット10の緩み止めが
達成されるものである。That is, on the outside of the engagement sleeve 40, there is a stepped portion 4 which is cut out so as to be partially thin in the axial direction.
0a is formed, and when the sleeve 40 is inserted into the elongated hole 38a of the stepped hole 38, the thin surface 40a faces the female screw hole 28 of the cylindrical inner member 14.
The head diameter of the mounting bolt 42 is set to be smaller than the inner diameter of the large-diameter long hole 38a so that the head can be completely buried in the long hole 38a. Also mounting bolt 4
When the bolt 2 extending from the other end of the sleeve 40 is locked by the E ring 44 shown in FIG. It is designed to prevent the falling off. The engagement sleeve 40 is provided with the stepped hole 38 until the nut 10 is mounted on the rotary shaft 30 shown in FIG. 8 and the required tightening is completed.
It is inserted loosely. Then, after the tightening is completed, the mounting bolt 42 is further screwed into the small-diameter short hole 38b in the stepped hole 38.
The step portion 40a of the step abuts on the male screw portion 32 of the rotary shaft 30, and thus the loosening of the nut 10 with respect to the rotary shaft 30 is achieved.
【0014】(円弧状ブロックについて)図1、図2およ
び図3に示すように、円筒状内側部材14の円周溝14
aに2つの円弧状ブロック16,16が着脱自在に介装
され、2つの対向し合うフランジ14b,14cの間に
位置している。すなわち円弧状ブロック16,16は、
その円弧状をなす内周面16aの曲率を円筒状内側部材
14における円周溝14aの外周曲率に略一致させると
共に、その円弧状をなす外周面16bの曲率を前記フラ
ンジ14b,14cの外周曲率に略一致させてある。ま
た夫々の円弧状ブロック16における軸方向の厚みは、
円筒状内側部材14における2つのフランジ14b,1
4cの軸方向間隔より僅かに小さめに設定してある。更
に図1および図2に示すように、円弧状ブロック16に
おける周方向の端面には段部16cが形成されている。As to the arc-shaped block, as shown in FIGS. 1, 2 and 3, the circumferential groove 14 of the cylindrical inner member 14 is used.
Two arcuate blocks 16 and 16 are detachably interposed in a, and are located between two opposing flanges 14b and 14c. That is, the arc-shaped blocks 16, 16 are
The curvature of the arc-shaped inner peripheral surface 16a is made substantially equal to the outer peripheral curvature of the circumferential groove 14a in the cylindrical inner member 14, and the curvature of the arc-shaped outer peripheral surface 16b is adjusted to the outer peripheral curvature of the flanges 14b and 14c. Is roughly matched with. The axial thickness of each arcuate block 16 is
Two flanges 14b, 1 on the cylindrical inner member 14
It is set slightly smaller than the axial distance of 4c. Further, as shown in FIGS. 1 and 2, a step portion 16c is formed on the circumferential end surface of the arc-shaped block 16.
【0015】そして図4に示す如く、2つの円弧状ブロ
ック16,16を前記円筒状内側部材14の円周溝14
aを挟んで対向させた際に、夫々の段部16cが互いに
対向し合うようになっている。この状態で向き合ってい
る段部16c,16cの間に長方形の固定片17を介在
させた後、円筒状内側部材14および両円弧状ブロック
16,16を円筒状外側部材12の内周面に軸方向から
挿入する。このとき固定片17は、円筒状内側部材14
の外周面から若干半径方向外方へ突出しているが、円筒
状外側部材12の内周面には前述した凹溝20,20が
対応的に凹設してあるので、夫々の固定片17の突出部
は、図4に示す如く、各対応の凹溝20に収納される。
従って2つの円筒状ブロック16,16は、円筒状外側
部材12の内周面に円滑に挿入される。次いで皿ネジ2
4を、円筒状外側部材12に穿設した前記皿孔22を介
して挿入し、固定片17に穿設した雌ネジ孔46にネジ
込むことで、両円弧状ブロック16,16は円筒状外側
部材12に固定されて一体化する。As shown in FIG. 4, the two arc-shaped blocks 16 and 16 are provided in the circumferential groove 14 of the cylindrical inner member 14.
When facing each other with "a" sandwiched therebetween, the respective stepped portions 16c face each other. After the rectangular fixing piece 17 is interposed between the step portions 16c, 16c facing each other in this state, the cylindrical inner member 14 and both arc-shaped blocks 16, 16 are axially attached to the inner peripheral surface of the cylindrical outer member 12. Insert from the direction. At this time, the fixing piece 17 is fixed to the cylindrical inner member 14
Although it projects slightly outward in the radial direction from the outer peripheral surface of the above, the above-mentioned concave grooves 20, 20 are correspondingly provided in the inner peripheral surface of the cylindrical outer member 12. The protrusions are housed in the corresponding recessed grooves 20 as shown in FIG.
Therefore, the two cylindrical blocks 16 and 16 are smoothly inserted into the inner peripheral surface of the cylindrical outer member 12. Then countersunk screw 2
4 is inserted through the countersunk hole 22 formed in the cylindrical outer member 12 and is screwed into the female screw hole 46 formed in the fixing piece 17, so that both arc-shaped blocks 16 and 16 are cylindrical outside. It is fixed to the member 12 and integrated.
【0016】(ヘッド付きピンについて)前記夫々の円弧
状ブロック16は、圧縮コイルバネ48の弾発力により
軸方向へ弾力的に突出するヘッド付きピン18を複数個
備えている。すなわち夫々の円弧状ブロック16には、
図1に示す如く、所要の中心角で有底のバネ挿通孔50
が複数(図示例では3つ)穿設されると共に、その有底部
には皿ネジ52の挿入を許容する通孔54が穿設されて
いる。ヘッド付きピン18は、図1および図2に示すよ
うに、円筒状の拡大ヘッド18aおよびピン本体18b
から構成され、このピン本体18bの開放端には、軸方
向に所要深さで雌ネジ孔18c(図2および図3)が螺設
されている。また、圧縮コイルバネ48の中心には貫通
孔が軸方向に形成され、該貫通孔に前記ヘッド付きピン
18のピン本体18bが挿通される。この状態で圧縮コ
イルバネ48は、ヘッド付きピン18と共に前記円弧状
ブロック16のバネ挿通孔50へ収容される。前記ピン
本体18bに螺設した雌ネジ孔18cには、皿ネジ52
が円弧状ブロック16の通孔54を介して螺挿される。
この皿ネジ52におけるヘッド頂面には、後述する六角
レンチの嵌合挿入を許容する有底六角孔が凹設されてい
る。なお、弾性体の一例として前記コイルバネ48を挙
げたが、これに限定されるものでなく、合成ゴムや天然
ゴム等を材質とする弾性ブロックその他板状バネ等であ
ってもよい。(Regarding Headed Pin) Each arcuate block 16 is provided with a plurality of headed pins 18 which elastically project in the axial direction by the elastic force of the compression coil spring 48. That is, in each arc-shaped block 16,
As shown in FIG. 1, a bottomed spring insertion hole 50 is formed at a required central angle.
A plurality of holes (three in the illustrated example) are formed, and a through hole 54 for allowing the flat head screw 52 to be inserted is formed in the bottom portion thereof. As shown in FIGS. 1 and 2, the headed pin 18 includes a cylindrical enlarged head 18a and a pin body 18b.
A female screw hole 18c (FIGS. 2 and 3) is screwed at the required depth in the axial direction at the open end of the pin body 18b. Further, a through hole is formed in the center of the compression coil spring 48 in the axial direction, and the pin body 18b of the headed pin 18 is inserted into the through hole. In this state, the compression coil spring 48 is housed in the spring insertion hole 50 of the arc-shaped block 16 together with the headed pin 18. The female screw hole 18c screwed into the pin body 18b has a flat head screw 52
Is screwed through the through hole 54 of the arc-shaped block 16.
On the top surface of the head of the flat head screw 52, a bottomed hexagonal hole that allows a hexagonal wrench, which will be described later, to be fitted and inserted is recessed. Although the coil spring 48 has been described as an example of the elastic body, the elastic body is not limited to this, and may be an elastic block made of synthetic rubber, natural rubber or the like, or a plate spring.
【0017】前記皿ネジ52を締め付け方向へ回転させ
ると、図6に示すように、前記ヘッド付きピン18は圧
縮コイルバネ48を圧縮させつつ軸方向左へ後退し、前
記拡大ヘッド18aを円弧状ブロック16のフランジ内
面から僅かに離間させて停止する。また皿ネジ52を緩
め方向へ回転させると、図7に示すように、ヘッド付き
ピン18は圧縮コイルバネ48の圧縮弾力を解放させつ
つ軸方向右へ前進し、拡大ヘッド18aをフランジ14
bの内壁面へ当接させるに至る。このように拡大ヘッド
18aがフランジ14bの内壁面に当接することで、円
筒状内側部材14および円筒状外側部材12は一体的に
回転可能な状態となる。なお、前記バネ挿通孔50に挿
通された圧縮コイルバネ48の長さは、前記皿ネジ52
を緩め方向へ回転させた結果として前記ヘッド付きピン
18の拡大ヘッド18aが前記フランジ14bの内壁面
に当接しても、該コイルバネ48の圧縮弾力が解放され
尽くさない程度の寸法に調節されている。When the flat head screw 52 is rotated in the tightening direction, as shown in FIG. 6, the head-equipped pin 18 moves axially backward while compressing the compression coil spring 48, and the expansion head 18a is arcuately blocked. It is slightly separated from the inner surface of the flange 16 and stopped. When the flat head screw 52 is rotated in the loosening direction, the headed pin 18 advances axially to the right while releasing the compression elastic force of the compression coil spring 48, as shown in FIG.
It comes into contact with the inner wall surface of b. As the enlarged head 18a contacts the inner wall surface of the flange 14b in this manner, the cylindrical inner member 14 and the cylindrical outer member 12 are integrally rotatable. The length of the compression coil spring 48 inserted into the spring insertion hole 50 is equal to the length of the countersunk screw 52.
Is adjusted to such a degree that the compression elastic force of the coil spring 48 is not completely released even if the enlarged head 18a of the headed pin 18 comes into contact with the inner wall surface of the flange 14b as a result of rotating in a loosening direction. .
【0018】すなわち圧縮コイルバネ48にピン本体1
8bを挿入したヘッド付きピン18を該コイルバネ48
と共にバネ挿通孔50に挿通すると、前記皿ネジ52の
締め付け程度に応じて、図6に示すように、拡大ヘッ
ド18aがフランジ14bの内壁面から離間した位置
と、図7に示すように、拡大ヘッド18aが該フラン
ジ14bの内壁面に当接する位置との間を進退し得るも
のである。この場合に、図3、図6および図7に示す如
く、前記圧縮コイルバネ48およびヘッド付きピン18
を挿通した前記円弧状ブロック16のバネ挿通孔50
と、円筒状内側部材14のフランジ14cに穿設した前
記挿入孔34とを整列させることで、該挿入孔34を介
して六角レンチ(図示せず)の挿入を許容し、該レンチに
よる前記皿ネジ52の締め付け方向および緩め方向への
回動を行なうことができる。That is, the compression coil spring 48 is attached to the pin body 1
8b is inserted into the headed pin 18 and the coil spring 48
When it is inserted through the spring insertion hole 50 together with it, the expansion head 18a is separated from the inner wall surface of the flange 14b as shown in FIG. 6 and the expansion head 18a is expanded as shown in FIG. The head 18a can move back and forth between the position where the head 18a contacts the inner wall surface of the flange 14b. In this case, as shown in FIGS. 3, 6 and 7, the compression coil spring 48 and the headed pin 18 are
Spring insertion hole 50 of the arc-shaped block 16 through which
And the insertion hole 34 formed in the flange 14c of the cylindrical inner member 14 are aligned to allow the insertion of a hexagon wrench (not shown) through the insertion hole 34, and the dish with the wrench. The screw 52 can be rotated in the tightening direction and the loosening direction.
【0019】(実施例の作用)次に、前述した構造に係る
ナット10の空転作用を説明する。図1および図2に関
して夫々説明した部材は、最終的に図3〜図5に示す如
く組立てられて、前記ナット10を構成している。すな
わち組立手順として、円弧状ブロック16の一方の端面
に穿設した3つのバネ挿入孔50に圧縮コイルバネ48
を挿入する。このとき圧縮コイルバネ48には、ヘッド
付きピン18のピン本体18bが予め挿入されている。
そして円弧状ブロック16の他方の端面側に開口する通
孔54を介して前記皿ネジ52を挿入した後、該皿ネジ
52をピン本体18bの開放端に穿設した前記雌ネジ孔
18cへ螺入する。すなわち皿ネジ52の締め付けによ
りヘッド付きピン18は、図6に示すように、コイルバ
ネ48の弾力に抗しつつ該皿ネジ52の側へ充分に引き
寄せられ(後退)、その拡大ヘッド18aの頂面を前記フ
ランジ14bの内壁面から離間させている。(Operation of Embodiment) Next, the idling operation of the nut 10 having the above-described structure will be described. The members described with reference to FIGS. 1 and 2 are finally assembled as shown in FIGS. 3 to 5 to form the nut 10. That is, as an assembling procedure, the compression coil spring 48 is inserted into the three spring insertion holes 50 formed in one end surface of the arc-shaped block 16.
Insert. At this time, the pin body 18b of the headed pin 18 is inserted into the compression coil spring 48 in advance.
Then, after inserting the flat head screw 52 through the through hole 54 opening to the other end face side of the arc-shaped block 16, the flat head screw 52 is screwed into the female screw hole 18c formed at the open end of the pin body 18b. To enter. That is, by tightening the flat head screw 52, the headed pin 18 is sufficiently pulled (retracted) toward the flat head screw 52 while resisting the elasticity of the coil spring 48, as shown in FIG. Is separated from the inner wall surface of the flange 14b.
【0020】このように夫々のヘッド付きピン18を配
設した2つの円弧状ブロック16,16は、図4に示す
ように、円筒状内側部材14の円周溝14aを挟んで対
向するよう組込まれ、前記対応し合う2つの段部16c,
16cの間に固定片17を介在させた状態で、円筒状外
側部材12の内周面へ軸方向から挿入される。そして前
記皿ネジ24を、円筒状外側部材12の皿孔22から固
定片17の雌ネジ孔46へネジ込むことで、前述の如く
円弧状ブロック16,16は円筒状外側部材12に固定
されて一体化する。但し、図6に関して説明した如く、
ヘッド付きピン18は皿ネジ52の側へ引き寄せられて
いて、その拡大ヘッド18aの頂面を前記フランジ14
bの内壁面から離間させているので、この時点で円筒状
内側部材14と円筒状外側部材12とは相互に自由に回
転可能となっている。As shown in FIG. 4, the two arcuate blocks 16 and 16 having the respective headed pins 18 arranged in this manner are assembled so as to face each other with the circumferential groove 14a of the cylindrical inner member 14 interposed therebetween. The two corresponding step portions 16c,
With the fixing piece 17 interposed between 16c, it is axially inserted into the inner peripheral surface of the cylindrical outer member 12. Then, the countersunk screws 24 are screwed from the countersunk holes 22 of the cylindrical outer member 12 into the female screw holes 46 of the fixing piece 17, so that the arc-shaped blocks 16, 16 are fixed to the cylindrical outer member 12 as described above. Unify. However, as described with reference to FIG.
The headed pin 18 is drawn toward the countersunk screw 52 side, and the top surface of the enlarged head 18a is attached to the flange 14
Since it is separated from the inner wall surface of b, the cylindrical inner member 14 and the cylindrical outer member 12 can freely rotate at this point.
【0021】そこで、例えば円筒状内側部材14に対し
て円筒状外側部材12を適宜回転させ、図3に示すよう
に円弧状ブロック16のバネ挿通孔50と、円筒状内側
部材14(におけるフランジ14c)の挿入孔34とを整
列させる。次いで、前記挿入孔34から六角レンチを挿
入して前記皿ネジ52の六角孔に係合させ、該レンチを
該皿ネジ52の緩み方向へ回動させることで、最終的に
全ての皿ネジ52を前記ヘッド付きピン18から脱落さ
せる。この皿ネジ52を緩み方向へ回動させる過程で前
記ヘッド付きピン18の拡大ヘッド18aは、図7に示
す如く、圧縮コイルバネ48の復帰弾力によりフランジ
14bの内壁面に当接し、円筒状内側部材14と円筒状
外側部材12は一体的に結合されるに至る。但し、これ
ら円筒状の内側部材14および外側部材12は圧縮コイ
ルバネ48の弾力によって摩擦係止されているだけであ
るから、何れか一方の円筒状部材(12または14)に所
定値を越えた回転トルクが加われば、当該一方の円筒状
部材(12または14)は他方の円筒状部材(14または
12)に対して空転し得るものである。Therefore, for example, the cylindrical outer member 12 is appropriately rotated with respect to the cylindrical inner member 14, and as shown in FIG. 3, the spring insertion hole 50 of the arcuate block 16 and the cylindrical inner member 14 (the flange 14c thereof). ) Is aligned with the insertion hole 34. Then, a hexagon wrench is inserted from the insertion hole 34 to engage with the hexagon hole of the flat head screw 52, and the wrench is rotated in the loosening direction of the flat head screw 52, so that all the flat head screws 52 are finally turned. Is dropped from the headed pin 18. In the process of rotating the flat head screw 52 in the loosening direction, the enlarged head 18a of the headed pin 18 abuts the inner wall surface of the flange 14b by the restoring elasticity of the compression coil spring 48, as shown in FIG. 14 and the cylindrical outer member 12 are integrally connected. However, since the cylindrical inner member 14 and the outer member 12 are frictionally locked by the elastic force of the compression coil spring 48, rotation of one of the cylindrical members (12 or 14) exceeding a predetermined value is prevented. When a torque is applied, the one cylindrical member (12 or 14) can idle with respect to the other cylindrical member (14 or 12).
【0022】次に図8に示す如く、丸鋸56を回転軸3
0に挿通した後、その両側からフランジ58,58で挟
持する。そして回転軸30の一端部近傍に螺設した雄ネ
ジ部32に、本実施例に係るナット10の雌ネジ孔28
を介してネジ込むことで、丸鋸56の固定が行なわれ
る。ここで使用されるナット10は、前述の如く各ヘッ
ド付きピン18から皿ネジ52が取外され、圧縮コイル
バネ48の弾力復帰作用下に円筒状内側部材14および
円筒状外側部材12が一体的に結合された状態になって
いるものである。なお回転軸30に対するナット10の
回動は、円筒状外側部材12の外周に90度間隔で設け
た前記通孔26に引掛けピン付きスパナ(図示せず)のピ
ンを挿入し、該引掛けピン付きスパナを作業者が回転操
作することで達成される。前記引掛けピン付きスパナに
よるナット10の回動締上げが進行し、該引掛けピン付
きスパナから円筒状外側部材12に加えられる回転トル
クが最大となる最終締上げ段階に至ると、第7図に示す
拡大ヘッド18aは円筒状内側部材14のフランジ内壁
面に対しスリップすることになる。すなわち円筒状外側
部材12は円筒状内側部材14に対して空転することに
なり、それ以上の回転トルクによる前記ナット10の締
付けは阻止されるので、回転軸30に対する丸鋸10の
適切な装着がなされることになる。従って、例えば丸鋸
10の半径方向への微小な拡大・縮小移動を許容し得る
ものである。Next, as shown in FIG. 8, the circular saw 56 is attached to the rotary shaft 3.
After being inserted into 0, it is clamped by the flanges 58, 58 from both sides thereof. Then, the male screw portion 32 screwed near one end of the rotary shaft 30 is provided with the female screw hole 28 of the nut 10 according to the present embodiment.
The circular saw 56 is fixed by screwing it in through. In the nut 10 used here, the flat head screw 52 is removed from each headed pin 18 as described above, and the cylindrical inner member 14 and the cylindrical outer member 12 are integrally formed under the elastic restoring action of the compression coil spring 48. It is in a combined state. To rotate the nut 10 with respect to the rotary shaft 30, insert a pin of a spanner (not shown) with a hooking pin into the through holes 26 provided at intervals of 90 degrees on the outer periphery of the cylindrical outer member 12, and pull the hook. This is achieved by the operator rotating the pinned wrench. When the turning tightening of the nut 10 by the spanner with the hooking pin progresses to reach the final tightening stage in which the rotational torque applied to the cylindrical outer member 12 from the spanner with the hooking pin becomes maximum, FIG. The enlarged head 18a shown in FIG. 6 slips on the inner wall surface of the flange of the cylindrical inner member 14. That is, the cylindrical outer member 12 will idle with respect to the cylindrical inner member 14, and the tightening of the nut 10 by a further rotating torque is prevented, so that the circular saw 10 can be properly mounted on the rotating shaft 30. Will be done. Therefore, for example, a minute enlargement / reduction movement of the circular saw 10 in the radial direction can be permitted.
【0023】[0023]
【発明の効果】以上に説明した如く本発明の円筒状部材
の空転構造によれば、例えば丸鋸のような回転切削工具
を回転軸に挿着する際の締め付けナットとして好適に使
用することができる。すなわち、同軸的に設けた2つの
円筒状部材の一方に回転方向への締め付けトルクを付与
すると、最初は両円筒状部材が一体的に回転するが、該
締め付けトルクが所要の値を超えると他方の部材に対し
て前記一方の部材が空転するので、その空転直前のトル
クを適正に予め設定しておくことで、ナット等の過剰締
め付けを好適に防止することができる。As described above, according to the idling structure of the cylindrical member of the present invention, it can be suitably used as a tightening nut when inserting a rotary cutting tool such as a circular saw into a rotary shaft. it can. That is, when a tightening torque in the rotation direction is applied to one of the two coaxially provided cylindrical members, both the cylindrical members initially rotate integrally, but when the tightening torque exceeds a required value, the other Since the one member rotates idly with respect to the member, the torque just before the idling can be appropriately preset so that excessive tightening of the nut or the like can be suitably prevented.
【図1】好適な実施例に係る円筒状部材の空転構造であ
るナットを分解して示す斜視図である。FIG. 1 is an exploded perspective view showing a nut having a cylindrical member idling structure according to a preferred embodiment.
【図2】図1より左側に視点を移すと共に、ナットを1
80度回転させた状態で示す分解斜視図である。[Fig. 2] Shift the viewpoint to the left side of Fig. 1 and set the nut to 1
It is a disassembled perspective view shown in the state rotated by 80 degrees.
【図3】円筒状部材の空転構造であるナットの側面図で
あって、中心線から下方を切断面で示している。FIG. 3 is a side view of a nut, which is an idle structure of a cylindrical member, and shows a lower part from a center line by a cut surface.
【図4】図3に示すナットの4−4線断面図である。FIG. 4 is a sectional view taken along line 4-4 of the nut shown in FIG.
【図5】図3に示すナットの5−5線断面図である。5 is a sectional view taken along line 5-5 of the nut shown in FIG.
【図6】図3に示したナット切断面の拡大図であって、
拡大ヘッドの頂面がフランジ内面から離間した状態を示
している。6 is an enlarged view of the nut cut surface shown in FIG.
The top surface of the expansion head is shown separated from the inner surface of the flange.
【図7】図3に示したナット切断面の拡大図であって、
拡大ヘッドの頂面がフランジ内面に当接した状態を示し
ている。7 is an enlarged view of the cut surface of the nut shown in FIG.
The top surface of the expansion head is in contact with the inner surface of the flange.
【図8】丸鋸を回転軸に装着した状態を示す説明図であ
る。FIG. 8 is an explanatory diagram showing a state in which a circular saw is attached to a rotary shaft.
10 ナット 12 円筒状外側部材 14 円筒状内側部材 14a 円周溝 14b,14c フランジ 16 円弧状ブロック 17 固定片 18 ヘッド付きピン 18a 拡大ヘッド 18b ピン本体 18c 雌ネジ孔 20 凹溝 22 皿孔 24 皿ネジ 26 通孔 28 雌ネジ孔 30 回転軸 32 雄ネジ部 34 挿入部(六角レンチ用) 38 段付孔 38a 長尺孔 38b 短尺孔 40 係合スリーブ(係合部材) 40a 段差部 42 取付けボルト 44 Eリング 46 雌ネジ孔(係止孔の) 48 圧縮コイルバネ 50 バネ挿通孔(有底) 52 皿ネジ 54 通孔 56 丸鋸 58 フランジ 10 nuts 12 Cylindrical outer member 14 Cylindrical inner member 14a circumferential groove 14b, 14c flange 16 circular block 17 Fixed piece 18 Pin with head 18a Enlarging head 18b pin body 18c female screw hole 20 groove 22 countersink 24 flat head screws 26 through holes 28 Female screw hole 30 rotation axis 32 Male thread 34 Insertion part (for hexagon wrench) 38 Stepped hole 38a long hole 38b Short hole 40 Engaging sleeve (engaging member) 40a step 42 Mounting bolt 44 E-ring 46 Female screw hole (for locking hole) 48 compression coil spring 50 spring insertion hole (bottomed) 52 flat head screw 54 through holes 56 circular saw 58 flange
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Claims (4)
側部材(14)を同軸的かつ回転自在に配設し、弾性体(48)
の弾発力を利用した摩擦力を両円筒状部材(12,14)の間
に作用させることで、前記何れか一方の円筒状部材(12
または14)を回転させた際に他方の円筒状部材(14または
12)も一体的に回転させ、 前記弾性体(48)の弾発力の調節により前記摩擦力の調節
を行なって、前記何れか一方の円筒状部材(12または14)
に所定値を越えた回転トルクが加わった際に、当該一方
の円筒状部材(12または14)が他方の円筒状部材(14また
は12)に対し空転するのを許容するよう構成したことを
特徴とする円筒状部材の空転構造。1. An elastic body (48) in which a cylindrical inner member (14) is coaxially and rotatably disposed on the inner peripheral surface of the cylindrical outer member (12).
By applying a frictional force using the elastic force of the two cylindrical members (12, 14) to each other, one of the cylindrical members (12
Or 14) when rotating the other cylindrical member (14 or
12) is also rotated integrally, the frictional force is adjusted by adjusting the elastic force of the elastic body (48), and either one of the cylindrical members (12 or 14)
When a rotational torque exceeding a predetermined value is applied to the one cylindrical member (12 or 14), the other cylindrical member (14 or 12) is allowed to idle. The idling structure of the cylindrical member.
れか一方の円筒状部材(12または14)から他方の円筒状部
材(14または12)へ軸方向に作用する請求項1記載の円筒
状部材の空転構造。2. The frictional force generated by the elastic body (48) acts in the axial direction from the one cylindrical member (12 or 14) to the other cylindrical member (14 or 12). Idle structure of the cylindrical member.
ネジ部(28)が螺設され、回転軸(30)の外周に螺設した雄
ネジ部(32)が前記雌ネジ部(28)を設けた中心通孔に螺挿
される請求項1記載の円筒状部材の空転構造。3. A female screw portion (28) is screwed in a central through hole of the cylindrical inner member (14), and a male screw portion (32) screwed on the outer periphery of a rotary shaft (30) is the female screw. The cylindrical member idling structure according to claim 1, which is screwed into a central through hole provided with a portion (28).
通孔(28)へ接線方向から進退自在に臨む係合部材(40)が
設けられ、前記回転軸(30)を該円筒状内側部材(14)の中
心通孔に螺挿した後に、該係合部材(40)を回転軸(30)の
雄ネジ部(32)に係合させて緩み止めを行なう請求項3記
載の円筒状部材の空転構造。4. The cylindrical inner member (14) is provided with an engaging member (40) which is capable of advancing and retreating from the tangential direction to the central through hole (28), and the rotating shaft (30) is provided with the engaging member (40). 4. The loosening stopper according to claim 3, wherein the engagement member (40) is engaged with the male screw portion (32) of the rotary shaft (30) to be loosened after being screwed into the center through hole of the inner member (14). Idling structure of a cylindrical member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002011862A JP2003214463A (en) | 2002-01-21 | 2002-01-21 | Idle rotation structure of cylindrical members |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002011862A JP2003214463A (en) | 2002-01-21 | 2002-01-21 | Idle rotation structure of cylindrical members |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2003214463A true JP2003214463A (en) | 2003-07-30 |
Family
ID=27649237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002011862A Pending JP2003214463A (en) | 2002-01-21 | 2002-01-21 | Idle rotation structure of cylindrical members |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2003214463A (en) |
-
2002
- 2002-01-21 JP JP2002011862A patent/JP2003214463A/en active Pending
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