JPS6310890Y2 - - Google Patents
Info
- Publication number
- JPS6310890Y2 JPS6310890Y2 JP1984117700U JP11770084U JPS6310890Y2 JP S6310890 Y2 JPS6310890 Y2 JP S6310890Y2 JP 1984117700 U JP1984117700 U JP 1984117700U JP 11770084 U JP11770084 U JP 11770084U JP S6310890 Y2 JPS6310890 Y2 JP S6310890Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- nut
- bolt
- crest
- screwing direction
- 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.)
- Expired
Links
- 239000011295 pitch Substances 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
【考案の詳細な説明】
本考案はゆるみ止め性能に優れたナツトのめね
じをねじ切り加工するねじタツプに関するもので
ある。[Detailed Description of the Invention] The present invention relates to a screw tap for threading the female thread of a nut, which has excellent locking performance.
第6図に示す如く、標準的なナツト1はねじ山
2の山頂部3及び谷底部4が軸線Oを中心に、こ
れに平行に形成されている。 As shown in FIG. 6, in the standard nut 1, the crest 3 and the root 4 of the thread 2 are formed parallel to the axis O.
従つて第7図に示す如くボルト5に対してナツ
ト1を矢印S方向に進行させる締め付け時と、逆
に第8図で示す如く矢印t方向に進行させる戻し
時とを比較しても、ナツト1の谷底部4とボルト
5のねじ山6の山頂部7との間隙lが等しく、各
進み側フランク8,9と追い側フランク10,1
1相互の接触状態に差がないため、締め付けトル
クと戻りトルクとは同じ値となる。一方、従来よ
りめねじ形状を工夫して締着後のゆるみを抑制し
た種々のゆるみ止めナツトが知られているが、こ
れらの大半は戻りトルクが大きい反面、締め付け
トルクも大きくなつており、締め付け操作に強い
力を要するものである。 Therefore, even if we compare the tightening process in which the nut 1 is moved in the direction of the arrow S relative to the bolt 5 as shown in FIG. 7, and the tightening process in which the nut 1 is moved in the direction of the arrow T as shown in FIG. The gap l between the root 4 of the thread 6 of the bolt 5 and the crest 7 of the thread 6 of the bolt 5 is equal, and the leading flanks 8, 9 and the trailing flanks 10, 1 are equal.
1. Since there is no difference in the mutual contact state, the tightening torque and the return torque have the same value. On the other hand, various types of locking nuts have been known in which the internal thread shape has been devised to suppress loosening after tightening, but most of these nuts have a large return torque, but also have a large tightening torque, making it difficult to tighten them. It requires strong force to operate.
本考案は戻りトルクが大きくしかも締め付けト
ルクが比較的小さいという画期的性能を具備した
理想的なゆるみ止めナツトのめねじをねじ切り形
成することができるねじタツプを提供するもので
ある。 The present invention provides a screw tap that can form an ideal internal thread of a locking nut, which has the revolutionary performance of having a large return torque and a relatively small tightening torque.
以下本考案の実施例を図面に基づいて説明す
る。 Embodiments of the present invention will be described below based on the drawings.
第1図において、25はねじタツプ本体で、2
6はシヤンク部である。ねじタツプ本体25は、
軸方向に沿つた4筋の溝27により半径方向に等
配四分割されたねじ刃部28からなり、このねじ
刃部28は先端部から中程部にかけての食付き部
28aと中程部から後端部にかけてのねじ切り部
28bとからなつている。 In Fig. 1, 25 is the screw tap body;
6 is a shank portion. The screw tap body 25 is
It consists of a threaded blade part 28 divided into four equal parts in the radial direction by four grooves 27 along the axial direction. It consists of a threaded portion 28b extending to the rear end.
しかしてねじ切り部28bは第2図aに示すよ
うに、軸線Oに対し1゜〜1.5゜の傾斜角度θ間傾斜
した仮想基準線Qを中心に、これに平行してねじ
山29の山頂部30と谷底部31とが等ピツチに
形成され、これによつて各ねじ山29の山頂部3
0並びに谷底部31と軸中心Aとの距離l1,l2が
矢印Bで示すようにねじ込み方向側に至るにした
がつて順次径小に形成されると共に、上記各ねじ
山29の両フランクが仮想基準線Qの傾斜角度に
相当する角度だけねじ込み方向Bに傾斜して形成
されてなるものである。 As shown in FIG. 2a, the threaded portion 28b is centered on the virtual reference line Q, which is inclined at an angle θ of 1° to 1.5° with respect to the axis O, and extends parallel to the crest of the thread 29. 30 and the root portion 31 are formed at equal pitches, thereby making the crest portion 3 of each thread 29
The distances l 1 , l 2 between the shaft center A and the root portion 31 are gradually reduced in diameter as they reach the screwing direction side as shown by the arrow B, and both flanks of each thread 29 are is formed so as to be inclined in the screwing direction B by an angle corresponding to the inclination angle of the virtual reference line Q.
第2図bに示すねじ切り部28′bは上記実施
例とほとんど同じ構成であるが、ただ上記実施例
にあつてはねじ山29の山頂部30は曲面(アー
ル)状に形成されているが、本実施例の山頂部3
0′にあつてはねじ込み方向Bに山頂部高さが低
くなるテーパ面に形成されてなるものである。 The threaded portion 28'b shown in FIG. 2b has almost the same structure as the embodiment described above, except that in the embodiment described above, the crest 30 of the thread 29 is formed into a curved (R) shape. , mountaintop part 3 of this example
In the case of 0', it is formed into a tapered surface in which the height of the crest becomes lower in the screwing direction B.
しかして上記構成からなるねじタツプによつ
て、予め下穴加工されたナツト素材に矢印B方向
に向かつてねじ切り加工を行うことによつて第3
図aまたは第3図bに示すゆるみ止めナツト12
a,12bが製作される。 However, by using the screw tap having the above-mentioned structure to perform thread cutting in the direction of arrow B on a nut material that has previously been prepared with a pilot hole, a third thread can be cut in the direction of arrow B.
Locking nut 12 shown in Figure a or Figure 3b
a and 12b are manufactured.
即ち第3図aは第2図aに示すねじ切り部28
bを有するねじタツプによつて製作されたナツト
12aの縦断面を示すもので、ナツト端面との交
差が90゜の軸線Oに対し、所定の傾斜角度θをも
つ仮想基準線Qを中心に、これに平行にねじ山1
3の仮想山頂部14と実体谷底部15とを形成
し、このうち仮想山頂部14については軸線Oに
平行な下穴径Pより内側に存在し、したがつて下
穴径Pがめねじ内径となる平坦な実体山頂部16
を形成し、この実体谷底部15と実体山頂部16
とを等ピツチに形成することによつて該谷底部1
5はねじ込み方向(図中下方向)に向かうにつれ
て漸次深くなると共に、該谷底部15から実体山
頂部16にかけての進み側フランク17と追い側
フランク18が上記基準線Qの傾斜角度に相当す
る角度だけねじ込み方向に傾斜して形成される。 That is, FIG. 3a shows the threaded portion 28 shown in FIG. 2a.
This figure shows a vertical cross section of a nut 12a manufactured by a screw tap having a diameter of 12. Thread 1 parallel to this
3, the virtual peak portion 14 is located inside the prepared hole diameter P parallel to the axis O, and therefore the prepared hole diameter P is the inner diameter of the female thread. A flat solid mountain top 16
, and this physical valley bottom 15 and physical mountain top 16
By forming the valley bottoms 1 at equal pitches,
5 is an angle that gradually becomes deeper as it goes in the screwing direction (downward in the figure), and that the leading side flank 17 and the trailing side flank 18 from the valley bottom 15 to the real mountain top 16 correspond to the inclination angle of the reference line Q. It is formed to be inclined in the screwing direction.
第3図bは、第2図bに示すねじ切り部28′
を有するねじタツプによつて製作されたナツト1
2bの縦断面を示すもので、上記ナツト12aに
あつては谷底部15は曲面(アール)状に形成さ
れているが、このナツト12bにあつては戻り方
向(上方向)が浅く、ねじ込み方向(下方向)が
深くなるようテーパ面状の谷底部15′に形成さ
れている。 Figure 3b shows the threaded section 28' shown in Figure 2b.
Nut 1 made with a screw tap having
2b shows a vertical cross section of the nut 12b. In the nut 12a, the root portion 15 is formed into a curved surface (R) shape, but in the case of this nut 12b, the return direction (upward direction) is shallower, and the screwing direction is shallower. It is formed in a tapered valley bottom portion 15' so that it becomes deeper (in the downward direction).
第4図a,bは上記構造のナツト12a,12
bをボルト19にトルクをかけない手締め途中の
状態を示すもので、これらナツト12aまたは1
2bのねじ山13がねじ込み方向に、即ち図中下
向きに若干傾斜して形成されるため、ナツトねじ
山13の進み側フランク17とボルトねじ山20
の追い側フランク22、および前者の追い側フラ
ンク18と後者の進み側フランク21との間にそ
れぞれほぼ均等の間隙が形成されるようにして
(勿論両者の一部周面は接触しているが)ねじ込
まれ、両者の接触面積が少ないため比較的軽い力
でねじ込むことができる。この点従来一般のナツ
トでは第8図に示すようにナツトねじ山2の追い
側フランク10全域が、ボルトねじ山6の進み側
フランク9に接触ぎみにねじ込まれ、両者の互の
接触面積が大きいため、それだけ締め付け時の摺
動抵抗が大となる。 Figures 4a and 4b show nuts 12a and 12 of the above structure.
b shows the state in the middle of manual tightening without applying torque to the bolts 19, and these nuts 12a or 1
Since the thread 13 of 2b is formed with a slight inclination in the screwing direction, that is, downward in the figure, the advancing side flank 17 of the nut thread 13 and the bolt thread 20
Approximately equal gaps are formed between the trailing flank 22 of the former, and the trailing flank 18 of the former and the leading flank 21 of the latter (although, of course, some of their circumferential surfaces are in contact with each other). ), and since the contact area between the two is small, it can be screwed in with relatively light force. In this regard, in conventional nuts, as shown in FIG. 8, the entire trailing side flank 10 of the nut thread 2 is screwed into contact with the leading side flank 9 of the bolt thread 6, and the mutual contact area between the two is large. Therefore, the sliding resistance during tightening increases accordingly.
第5図a,bは上記ナツト12a,12bを上
述の手締め途上からスパナー、レンチなど作業工
具を用いて一定の締め付けトルクのもとでボルト
19に最終の締め付け作業がなされたときの両者
の作用状態を示すもので、ナツト12aまたは1
2bのねじ山谷底部15,15′は上端部側ほど
浅く形成されているため、ボルト19のねじ山山
頂部23はナツト12aあるいは12bの最上端
部のねじ山谷底部15aあるいは15′aに最も
強く当たる。この場合前述の手締め時においてボ
ルト19のねじ山20はナツト12aに押圧され
ていないため、ねじ山20は弾性変形せず、ナツ
ト12aのねじ山谷底部15に当接しないが、作
業工具によつて一定以上の締め付けトルクによつ
てナツト12aをボルト19にねじ込んだ場合に
は、ナツトのねじ山13が若干ねじ込み方向に傾
斜されているためその進み側フランク17がボル
ト19のねじ山20の追い側フランク22を強く
押圧し、これがためにボルト19のねじ山20が
若干拡径方向に弾性変形し、これによつてナツト
12aの最上端部谷底部15aにボルト19のね
じ山山頂部23が矢印mで示すように強く当接
し、この強い当接抵抗に打ち勝つてナツト12a
を強く締付けることによつて、ナツト12aは被
締付材Wの反力を受け、かつボルト19のねじ山
20の弾性反力をナツト12aのねじ山13が受
けることによつて強力なゆるみ止めの作用を発揮
することになる。 Figures 5a and 5b show the final tightening operation of the bolt 19 using a work tool such as a spanner or wrench under a certain tightening torque after the nuts 12a and 12b were tightened by hand as described above. Indicates the operating state, nut 12a or 1
Since the thread ridge bottoms 15, 15' of the bolt 19 are formed to be shallower toward the upper end, the thread crest 23 of the bolt 19 is strongest at the thread ridge bottom 15a or 15'a at the uppermost end of the nut 12a or 12b. It's true. In this case, since the thread 20 of the bolt 19 is not pressed against the nut 12a during manual tightening described above, the thread 20 does not deform elastically and does not come into contact with the thread root 15 of the nut 12a. Therefore, when the nut 12a is screwed into the bolt 19 with a tightening torque exceeding a certain level, since the thread 13 of the nut is slightly inclined in the screwing direction, the advancing side flank 17 will follow the thread 20 of the bolt 19. The side flank 22 is strongly pressed, which causes the thread 20 of the bolt 19 to be elastically deformed slightly in the diametrical direction, whereby the thread crest 23 of the bolt 19 is attached to the root 15a of the uppermost end of the nut 12a. The nut 12a makes strong contact as shown by arrow m and overcomes this strong contact resistance.
By strongly tightening the nut 12a, the nut 12a receives the reaction force of the tightened material W, and the thread 13 of the nut 12a receives the elastic reaction force of the thread 20 of the bolt 19, thereby providing a strong locking mechanism. This will result in the effect of
特に第5図bに示すように、ねじ山谷底部1
5′を戻り方向が浅く、ねじ込み方向が深くなる
ようなテーパ面状に形成されたナツト12bにあ
つては、該ナツト12bを逆回転させてボルト1
9に対してナツト12bを戻そうとした場合に
は、ボルト19の山頂部23がナツト12bの谷
底部15′のテーパ面の高い側、すなわち谷底部
15′の浅い側へスライドして接触し、ナツト1
2bとボルト19間の余裕がない状態となり、両
ねじ山13,20の対接フランク17,22相互
が矢印m方向に強く圧接する。従つてナツト12
bの戻し動作には締め付け動作に対して著しく大
きなトルクが必要であり、これによりナツト12
bは締着後のゆるみに対して一層強い抵抗力を備
えることになる。 In particular, as shown in FIG. 5b, the thread valley bottom 1
If the nut 12b has a tapered surface such that the return direction is shallow and the screwing direction is deep, the nut 12b is rotated in the opposite direction to tighten the bolt 1.
9, the crest 23 of the bolt 19 slides into contact with the higher side of the tapered surface of the root 15' of the nut 12b, that is, the shallower side of the root 15'. , Natsuto 1
2b and the bolt 19, and the opposing flanks 17, 22 of both threads 13, 20 are strongly pressed against each other in the direction of the arrow m. Therefore, Natsu 12
The returning action of b requires a significantly larger torque than the tightening action, which causes the nut 12 to tighten.
b provides stronger resistance to loosening after tightening.
以上のように考案によれば、ねじタツプにより
製作されたナツトのねじ山の進み側フランクと追
い側フランクがねじ込み方向に傾斜して形成され
るため、該ナツトをボルトに螺合させて締付ける
途上では、そのナツトとボルトのねじ山どうしが
部分的にしか接触せず、接触抵抗が小さいことか
ら、比較的軽い力でナツトをねじ込むことができ
る。また、ナツトを一定以上の締付けトルクでね
じ込んで被締付材に圧接させる最終締付け時に
は、部分的にしか接触していなかつた上記両山ど
うしが互いに強く全面的に圧接させられ、これに
加えてナツトの谷底部が、本考案のねじタツプに
より、ねじ込み方向に向かうにつれて漸次深く形
成されていることから、該ナツトの最上端谷底部
にボルトねじ山の山頂部が強く当接させられ、こ
の2つの作用により、その両山が互いに固着しあ
つて、強力なゆるみ止め作用が生じる。 According to the invention as described above, the leading flank and the trailing flank of the thread of the nut manufactured by the screw tap are formed to be inclined in the screwing direction, so that when the nut is screwed onto the bolt and tightened. Since the threads of the nut and bolt only partially contact each other, and the contact resistance is small, the nut can be screwed in with relatively light force. In addition, during final tightening, in which the nut is screwed in with a tightening torque above a certain level and pressed into contact with the material to be tightened, the above-mentioned two threads, which were only partially in contact with each other, are brought into strong and full pressure contact with each other, and in addition to this, Since the root of the nut is formed to be gradually deeper in the screwing direction due to the screw tap of the present invention, the top of the bolt thread is brought into strong contact with the root of the uppermost end of the nut. Due to this action, the two ridges stick to each other, creating a strong locking effect.
第1図は本考案の一実施例の正面図、第2図a
は同要部の縦断正面図、第2図bは同他の実施例
の要部の縦断正面図、第3図aは本考案の第2図
aに示す一実施例によつて製作されたナツトの縦
断正面図、第3図bは同第2図bに示す実施例に
よつて製作されたナツトの縦断正面図、第4図a
及び第4図bはそれぞれ第3図a及び第3図bに
示すナツトの作動状態を示す縦断正面図、第5図
a及び第5図bも同様の作動状態を示す縦断正面
図、第6図〜第8図は従来のナツト及びその作動
状態を示す縦断正面図である。
O……軸線、Q……仮想基準線、29……ねじ
山、30,30′……山頂部、31……谷底部、
l1,l2……ねじ山の山頂部並びに谷底部と軸中心
との距離、A……軸中心、B……ねじ込み方向
線。
Figure 1 is a front view of an embodiment of the present invention, Figure 2 a
is a longitudinal sectional front view of the same main part, Fig. 2b is a longitudinal sectional front view of the main part of another embodiment, and Fig. 3a is manufactured according to the embodiment shown in Fig. 2a of the present invention. A longitudinal sectional front view of the nut, FIG. 3b, is a longitudinal sectional front view of the nut manufactured according to the embodiment shown in FIG. 2b, FIG. 4a.
and FIG. 4b are longitudinal sectional front views showing the operating state of the nut shown in FIGS. 3a and 3b, respectively. FIGS. 8 are longitudinal sectional front views showing a conventional nut and its operating state. O... Axis line, Q... Virtual reference line, 29... Screw thread, 30, 30'... Mountain top, 31... Valley bottom,
l 1 , l 2 ... Distance between the top and bottom of the thread and the shaft center, A ... Shaft center, B ... Threading direction line.
Claims (1)
に、これに平行にねじ山の山頂部と谷底部とを
等ピツチに形成し、これによつて各ねじ山の山
頂部並びに谷底部と軸中心との距離がねじ込み
方向側に至るにしたがつて順次径小に形成され
ると共に、上記各ねじ山の両フランクが上記仮
想基準線の傾斜角度に相当する角度だけねじ込
み方向に傾斜して形成されてなるねじタツプ。 2 前記ねじ山の山頂部はねじ込み方向に山頂部
高さが低くなるテーパ面に形成されてなる実用
新案登録請求の範囲第1項記載のねじタツプ。[Claims for Utility Model Registration] 1. The tops and bottoms of the threads are formed at equal pitches parallel to a virtual reference line that is slightly inclined with respect to the axis. The distance between the crest and the bottom of the shaft and the center of the shaft is gradually reduced in diameter as it approaches the screwing direction, and both flanks of each thread are formed at an angle corresponding to the inclination angle of the virtual reference line. A screw tap formed at an angle in the screwing direction. 2. The screw tap according to claim 1, wherein the crest of the thread is formed into a tapered surface whose crest height decreases in the screwing direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11770084U JPS6131619U (en) | 1984-07-30 | 1984-07-30 | screw tap |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11770084U JPS6131619U (en) | 1984-07-30 | 1984-07-30 | screw tap |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6131619U JPS6131619U (en) | 1986-02-26 |
JPS6310890Y2 true JPS6310890Y2 (en) | 1988-03-31 |
Family
ID=30676605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11770084U Granted JPS6131619U (en) | 1984-07-30 | 1984-07-30 | screw tap |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6131619U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5846732B2 (en) * | 2010-10-01 | 2016-01-20 | 濱中ナット株式会社 | Nut processing method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS527487B2 (en) * | 1973-07-28 | 1977-03-02 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS527487U (en) * | 1975-07-03 | 1977-01-19 |
-
1984
- 1984-07-30 JP JP11770084U patent/JPS6131619U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS527487B2 (en) * | 1973-07-28 | 1977-03-02 |
Also Published As
Publication number | Publication date |
---|---|
JPS6131619U (en) | 1986-02-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20220032362A1 (en) | Workpieces for making fasteners and tools | |
US5618236A (en) | Anti-cross thread fastener with cleaning tip | |
US4269246A (en) | Fastener and driver assembly | |
JP4801837B2 (en) | A spiral drive system for threaded fasteners | |
US4812095A (en) | Threaded fastener | |
US5358367A (en) | Screw or nut packing micro-adjustment | |
US4181457A (en) | Tapping tool for making vibration resistant prevailing torque fastener | |
US4396321A (en) | Tapping tool for making vibration resistant prevailing torque fastener | |
US2103944A (en) | Screw part and driver | |
US6908270B1 (en) | Self-locking bolt | |
JPS6253728B2 (en) | ||
US4952110A (en) | Anti-cross thread screw | |
US3249142A (en) | Lock screw | |
US2167559A (en) | Self-tapping screw | |
US4235149A (en) | Self-thread creating fastener and method and apparatus for making the same | |
US4104446A (en) | Self-tapping or thread-forming screw | |
US10780559B2 (en) | Helical toothed driver and compatible fastener | |
JPH09184506A (en) | Tapping screw | |
JPS6310890Y2 (en) | ||
US10562158B1 (en) | Self-locking fastener system and process | |
US4311423A (en) | Hole-drilling, extruding and thread-forming sheet screw | |
US3350975A (en) | Self-threading nut | |
USRE31284E (en) | Locking fastener | |
US3342233A (en) | Lock nut | |
JP4632859B2 (en) | Thread grinding method for twist groove tap |