JPS6149060B2 - - Google Patents
Info
- Publication number
- JPS6149060B2 JPS6149060B2 JP7773580A JP7773580A JPS6149060B2 JP S6149060 B2 JPS6149060 B2 JP S6149060B2 JP 7773580 A JP7773580 A JP 7773580A JP 7773580 A JP7773580 A JP 7773580A JP S6149060 B2 JPS6149060 B2 JP S6149060B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- screw
- drive shaft
- tapered
- axis
- 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
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
【発明の詳細な説明】
本発明は、ねじ締め装置に関し、特に位置精度
の悪いねじ穴に、ねじを正確に締め付けられるよ
うにしたねじ締め装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screw tightening device, and more particularly to a screw tightening device that can accurately tighten a screw into a screw hole with poor positional accuracy.
従来、全自動でねじ締めを行なう装置としてた
とえば、第１図に示すようなねじ締め装置が提案
されている。すなわち、固定ベース１に支持され
たシリンダ２の作動によつて昇降する移動ベース
３に固定されたモータ４と、このモータ４の回転
軸に結合されたねじ締め用のビツト５、および、
図示しない供給装置からホース７を通つて供給さ
れたねじを保持するヘツド部６とから成つてい
る。このようなねじ締め装置によつて、ねじ締め
を行なう場合、たとえば第２図に示すように、ワ
ーク８に形成されたねじ穴９の軸心１０とビツト
５の軸心１１が一致していないと、ねじ１２は傾
斜した状態でねじ込まれるため、ねじ穴９もしく
はねじ１２のねじ山を変形させたり、ねじ１２の
頭部を破損するなどの欠点がある。また、このよ
うな欠点をなくすには、ワーク８のねじ穴９の位
置精度を向上させると共に、ワーク８を正確に位
置決めするか、ねじ穴９の位置を検出して、ワー
ク８の停止位置を制御するなど、位置決めのため
の装置が複雑になつたり、多くの時間を必要とし
たりするなどの欠点がある。 Conventionally, a screw tightening device as shown in FIG. 1, for example, has been proposed as a fully automatic screw tightening device. That is, a motor 4 fixed to a movable base 3 that moves up and down by the operation of a cylinder 2 supported by a fixed base 1, a screw tightening bit 5 coupled to a rotating shaft of this motor 4, and
The head portion 6 holds a screw supplied through a hose 7 from a supply device (not shown). When tightening screws using such a screw tightening device, for example, as shown in FIG. Since the screw 12 is screwed in at an angle, there are disadvantages such as deforming the thread of the screw hole 9 or the screw 12 and damaging the head of the screw 12. In addition, in order to eliminate such drawbacks, the positional accuracy of the screw hole 9 of the workpiece 8 must be improved, and the workpiece 8 must be positioned accurately, or the position of the screw hole 9 can be detected to determine the stopping position of the workpiece 8. There are drawbacks such as the need for complicated positioning devices and the need for a lot of time.
本発明の目的は、上記した従来技術の欠点をな
くし、比較的位置精度合の低いねじ穴の軸心に対
し、ねじ締め用のビツトの軸心が一致するように
ビツトの位置を自動的に補正するようにしたねじ
締め装置を提供するにある。 An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to automatically position the bit so that the axis of the screw tightening bit coincides with the axis of the screw hole, which has relatively low positional accuracy. To provide a screw tightening device adapted to compensate.
上記目的を達成するため、本発明においては、
駆動軸を回動可能に支持する支持部材と、この支
持部材に前記駆動軸の軸心と直角方向に移動自在
に取り付けられ、前記駆動軸とオルダム継手によ
り結合されたビツト部を回動可能に支持する位置
決め部材と、テーパ形状の係合をばねによつて付
勢された軸とにより通常は前記支持部材と前記位
置決め部材とを一緒に固持し、ねじ締め時には前
記テーパ形状の係合を解除して前記位置決め部材
にフローテイング機能を持たせることを特徴とす
る。 In order to achieve the above object, in the present invention,
A support member rotatably supports a drive shaft, and a bit portion rotatably attached to the support member so as to be movable in a direction perpendicular to the axis of the drive shaft, and coupled to the drive shaft by an Oldham joint. The supporting member and the positioning member are normally held together by a supporting positioning member and a shaft biased by a spring to engage the tapered shape, and the tapered engagement is released when tightening the screw. The positioning member is characterized in that the positioning member has a floating function.
以下、本発明の一実施例を図面にしたがつて説
明する。 An embodiment of the present invention will be described below with reference to the drawings.
第３図ないし第６図は、本発明の一実施例を示
すもので同図において、支持手段は、ねじ締め装
置本体１５の一端に、駆動軸１７の出力端の外周
に位置するようにベアリング１４を介して形成さ
れたフランジ１６と、このフランジ１６の下端面
に、所定の間隔で平行に固定された一対のコの字
形の支持部材１８とによつて構成されている。前
記フランジ１６には、各々所定の位置に、軸心が
前駆動軸１７の軸と平行になるようにフランジ１
６を貫通する一対の穴１９が穿設され、かつ、こ
の穴１９の上部は、上方に向けて拡開するテーパ
穴１９ａに形成されている。 3 to 6 show one embodiment of the present invention, and in the same figures, the supporting means is a bearing located at one end of the screw tightening device main body 15 and located on the outer periphery of the output end of the drive shaft 17. 14, and a pair of U-shaped support members 18 fixed in parallel to the lower end surface of the flange 16 at a predetermined interval. Each of the flanges 16 is provided with a flange 1 at a predetermined position such that the axis thereof is parallel to the axis of the front drive shaft 17.
A pair of holes 19 are drilled through the hole 6, and the upper part of the hole 19 is formed into a tapered hole 19a that widens upward.
位置決め手段は、上端に前記テーパ穴１９ａと
嵌合するテーパ部２０ａが形成され、かつ、前記
穴１９を、穴１９の半径方向に移動可能に貫通す
る軸２０と、上端面が前記フランジ１６の下端面
とボール２１をはさんで対向し、かつ、支持部材
１８にボール２２を介して駆動軸の半径方向に移
動自在に支持され、しかも、ブツシユ２３を介し
て前記軸２０を、その軸方向に摺動可能に嵌合し
たベース２４と、このベース２４と前記軸２０の
下端に固定されたフランジ２５との間に挿着さ
れ、軸２０を下方に向けて付勢するスプリング２
６とによつて構成されている。 The positioning means has a tapered portion 20a formed at its upper end that fits into the tapered hole 19a, and a shaft 20 that passes through the hole 19 so as to be movable in the radial direction of the hole 19, and an upper end surface of the flange 16. The lower end face faces the ball 21 with the ball 21 in between, and is supported by the support member 18 via the ball 22 so as to be movable in the radial direction of the drive shaft. a base 24 that is slidably fitted into the shaft 20; and a spring 2 that is inserted between the base 24 and a flange 25 fixed to the lower end of the shaft 20 and biases the shaft 20 downward.
6.
ビツト２７は、取付用の軸部２８が、前記ベー
ス２４の中心にベアリング２９を介して回転自在
に支持されたビツトホルダ３０に挿入され、ボー
ル３１で係止されている。前記ベース２４の下面
中央には、前記ビツト２７を包むようにビツトカ
バ３２が固定されている。このビツトカバ３２に
は、その内部を真空供給源と接続するためのパイ
プ３３が接続されている。前記ビツトカバ３２の
内部には、スプリング３４で下方に向けて突出す
るように付勢され、かつ、Ｏリング３５でビツト
カバ３２の内周面との間の気密保持するようにし
たスライドリング３６が摺動自在に支持され、チ
ヤツクを構成している。ねじ１２′には、鍔３７
が挿着されている。ワーク８にはねじ穴９が形成
されている。３８はオルダム継手にして、駆動軸
１７とビツトホルダ３０の間に配置され、駆動軸
１７の回転をビツトホルダ３０に伝える。 A mounting shaft 28 of the bit 27 is inserted into a bit holder 30 rotatably supported at the center of the base 24 via a bearing 29, and is locked by a ball 31. A bit cover 32 is fixed to the center of the lower surface of the base 24 so as to cover the bit 27. A pipe 33 is connected to the bit cover 32 for connecting the inside thereof to a vacuum supply source. A slide ring 36 is slid inside the bit cover 32 and is urged to protrude downward by a spring 34 and is kept airtight with the inner peripheral surface of the bit cover 32 by an O-ring 35. It is movably supported and forms a chuck. The screw 12' has a collar 37.
is inserted. A screw hole 9 is formed in the workpiece 8 . Reference numeral 38 is an Oldham joint, which is disposed between the drive shaft 17 and the bit holder 30, and transmits the rotation of the drive shaft 17 to the bit holder 30.
上記の構成において、ワーク８の上方で待機す
るねじ締め装置のスライドリング３６の下端に、
図示しない供給装置からねじ１２′が供給され
る。同時にビツトカバ３２が真空供給源に接続さ
れると、ねじ１２′は、スライドリング３６に吸
引保持される。この状態で、ねじ締め装置を下降
させると、まず、フランジ２５がワーク８の上面
に当接する。そして、さらに下降させると、ねじ
１２′の先端がワーク８に当り、さらに、ビツト
２７がねじ１２′の頭部に当る。このとき、軸２
０は、上方に突出した状態となり、テーパ穴１９
ａとテーパ部２０ａの嵌合が外れ、ベース２４が
前駆動軸１７の半径方向へ移動できる状態にな
る。この状態で、ねじ締め装置全体に下降力を付
与しつつ、駆動軸１７を回す。すると、まず、ビ
ツト２７の先端がねじ１２′の頭部に係合する。
ついで、ねじ１２′の先端がワーク８のねじ穴９
にねじ込まれる。このとき、もし、ねじ１２′の
軸心１１′と、ねじ穴９の軸心１０が第５図のよ
うにズレていると、ねじ１２′には、その軸心１
１′をねじ穴９の軸心１０に一致させようとする
力が作用する。そして、この力によつてベース２
４が前記ズレをなくす方向に摺動し、ビツト２７
とねじ１２′の軸心１１′とねじ穴９の軸心１０を
一致させる。このとき駆動軸１７とビツトホルダ
３０がオルダム継手３８によつて、接続されてい
るので、駆動軸１７とビツトホルダ３０を切離す
必要はない。また、駆動軸１７の回転は、ビツト
ホルダ３０を介してビツト２７に確実に伝達され
る。 In the above configuration, at the lower end of the slide ring 36 of the screw tightening device waiting above the workpiece 8,
A screw 12' is supplied from a supply device (not shown). At the same time, when the bit cover 32 is connected to a vacuum source, the screw 12' is held by the slide ring 36 under suction. When the screw tightening device is lowered in this state, first, the flange 25 comes into contact with the upper surface of the workpiece 8. When the screw 12' is lowered further, the tip of the screw 12' hits the workpiece 8, and the bit 27 hits the head of the screw 12'. At this time, axis 2
0 is in an upwardly protruding state, and the taper hole 19
a and the tapered portion 20a are disengaged, and the base 24 becomes able to move in the radial direction of the front drive shaft 17. In this state, the drive shaft 17 is rotated while applying a downward force to the entire screw tightening device. Then, first, the tip of the bit 27 engages with the head of the screw 12'.
Next, the tip of the screw 12' is inserted into the screw hole 9 of the workpiece 8.
screwed into. At this time, if the axis 11' of the screw 12' and the axis 10 of the screw hole 9 are misaligned as shown in FIG.
A force acts to align 1' with the axis 10 of the screw hole 9. And by this power base 2
4 slides in the direction to eliminate the misalignment, and bit 27
The axis 11' of the screw 12' and the axis 10 of the screw hole 9 are aligned. At this time, since the drive shaft 17 and the bit holder 30 are connected by the Oldham joint 38, there is no need to separate the drive shaft 17 and the bit holder 30. Furthermore, the rotation of the drive shaft 17 is reliably transmitted to the bit 27 via the bit holder 30.
以上述べた如く、本発明においては、ねじ締め
装置の駆動軸の外周に設けた支持部材によつて、
位置決め手段を前記駆動軸の半径方向に移動可能
に支持し、かつ、前記位置決め手段にビツトを回
転自在に支持させると共に、駆動軸とビツトとを
オルダム継手で結合するようにしたので、位置精
度の悪いねじ穴に、ねじを確実にねじ込むことが
できる。また、簡単な構成で、安価な自動ねじ締
め装置を提供することができるなどの効果があ
る。 As described above, in the present invention, the support member provided on the outer periphery of the drive shaft of the screw tightening device enables
The positioning means is movably supported in the radial direction of the drive shaft, the bit is rotatably supported by the positioning means, and the drive shaft and the bit are connected by an Oldham joint, thereby improving positional accuracy. You can reliably screw screws into poorly screwed holes. Further, there are effects such as being able to provide an inexpensive automatic screw tightening device with a simple configuration.
第１図は従来の自動ねじ締め装置の側面図、第
２図は第１図の使用状態を示す要部の拡大図、第
３図は本発明によるねじ締め装置の要部の正面
図、第４図は第３図の断面図、第５図はワークと
ねじの位置関係を示す正面部分断面図、第６図は
使用状態を示す説明図である。
１５……ねじ締め装置本体、１６……フラン
ジ、１７……駆動軸、１８……支持部材、１９…
…穴、１９ａ……テーパ穴、２０……軸、２０ａ
……テーパ部、２１，２２……ボール、２３……
ブツシユ、２４……ベース、２５……フランジ、
２６……スプリング、２７……ビツト、３１……
ボール、３８……オルダム継手。
FIG. 1 is a side view of a conventional automatic screw tightening device, FIG. 2 is an enlarged view of the main parts shown in FIG. 4 is a sectional view of FIG. 3, FIG. 5 is a partial front sectional view showing the positional relationship between the workpiece and the screw, and FIG. 6 is an explanatory view showing the state of use. 15... Screw tightening device main body, 16... Flange, 17... Drive shaft, 18... Support member, 19...
...hole, 19a...tapered hole, 20...shaft, 20a
... Taper part, 21, 22 ... Ball, 23 ...
Button, 24...Base, 25...Flange,
26...spring, 27...bit, 31...
Ball, 38...Oldham joint.
Claims (1)
動軸の軸心と平行で、上方に拡開するテーパ穴と
このテーパ穴に続くストレート穴から成る第１の
貫通穴を有する支持部材と、前記駆動軸とオルダ
ム継手を介して結合されねじを回わして締め付け
るビツト部を前記駆動軸の軸心と平行な軸心につ
いて回動可能に支持しかつ、前記第１の貫通穴に
対向して設けられた第２の貫通穴を備え前記支持
部材に前記駆動軸の軸心と直角方向に移動自在に
取り付けられた位置決め部材と、頭部に前記テー
パ穴に係合するテーパ部を備え前記第１の貫通穴
と前記第２の貫通穴を貫通して摺動可能に支持さ
ればねにより前記テーパ穴に前記テーパ部が係合
するよう付勢された軸とから構成され、ねじ締め
時に前記軸のワークへの当接により前記テーパ穴
と前記テーパ部との係合が解除され、前記位置決
め部材が前記支持部材に対してフローテイング機
能を有するようにしたことを特徴とするねじ締め
装置。1. A support member that rotatably supports a drive shaft, has an axis parallel to the axis of the drive shaft, and has a first through hole consisting of a tapered hole that expands upward and a straight hole that continues to the tapered hole. and a bit portion that is connected to the drive shaft via an Oldham coupling and is tightened by turning a screw, is supported rotatably about an axis parallel to the axis of the drive shaft, and is opposed to the first through hole. a positioning member that is movably attached to the support member in a direction perpendicular to the axis of the drive shaft; and a tapered portion that engages with the tapered hole on the head. It is composed of a shaft that passes through the first through hole and the second through hole, is supported so as to be slidable, and is biased by a spring so that the tapered part engages with the tapered hole, and when tightening the screw. A screw tightening device characterized in that the engagement between the tapered hole and the tapered portion is released when the shaft comes into contact with the workpiece, and the positioning member has a floating function relative to the support member. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7773580A JPS578046A (en) | 1980-06-11 | 1980-06-11 | Thread fastening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7773580A JPS578046A (en) | 1980-06-11 | 1980-06-11 | Thread fastening device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS578046A JPS578046A (en) | 1982-01-16 |
| JPS6149060B2 true JPS6149060B2 (en) | 1986-10-27 |
Family
ID=13642159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7773580A Granted JPS578046A (en) | 1980-06-11 | 1980-06-11 | Thread fastening device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS578046A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59109428U (en) * | 1982-12-29 | 1984-07-24 | 富士通株式会社 | Rotating device for self-centering adjustment |
| JPS6078228U (en) * | 1983-11-02 | 1985-05-31 | 株式会社安川電機 | centering device |
| JPS60249548A (en) * | 1984-05-26 | 1985-12-10 | Daikin Ind Ltd | Preload tool holder for robot |
| JPH0764639B2 (en) * | 1986-10-03 | 1995-07-12 | 住友電気工業株式会社 | Method for manufacturing silicon nitride sintered body |
| CN103878577B (en) * | 2014-03-14 | 2017-01-18 | 广东上川智能装备股份有限公司 | Biaxial suction type automatic lock screw feeder |
| CN110814713B (en) * | 2018-08-08 | 2021-11-19 | 株洲中车时代电气股份有限公司 | Automatic screw tightening device and automatic screw assembling machine |
-
1980
- 1980-06-11 JP JP7773580A patent/JPS578046A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS578046A (en) | 1982-01-16 |
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