JPH0746461Y2 - Chuck mechanism in screw tightener - Google Patents
Chuck mechanism in screw tightenerInfo
- Publication number
- JPH0746461Y2 JPH0746461Y2 JP1991064088U JP6408891U JPH0746461Y2 JP H0746461 Y2 JPH0746461 Y2 JP H0746461Y2 JP 1991064088 U JP1991064088 U JP 1991064088U JP 6408891 U JP6408891 U JP 6408891U JP H0746461 Y2 JPH0746461 Y2 JP H0746461Y2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- support surface
- driver bit
- chuck
- chuck member
- 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 - Lifetime
Links
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、対向する少なくとも一
対の開閉自在なチャック部材を支持するノーズ部と、ネ
ジを打出すドライバビットと、との軸線方向に沿う相対
移動によってノーズ部に供給されたネジを、該ネジの頭
部にドライバビット先端部を係合させることによって該
ノーズ部より該チャック部材を介して外方に突出させて
ネジ締め動作を遂行するネジ締め機に係り、特にチャッ
ク部材を有するチャック機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is supplied to a nose portion by relative movement in the axial direction of a nose portion which supports at least a pair of openable and closable chuck members and a driver bit for driving a screw. A screw tightening machine for performing a screw tightening operation by engaging a screw head with a driver bit tip end so as to project outward from the nose part through the chuck member, and more particularly to a chuck. The present invention relates to a chuck mechanism having a member.
【０００２】[0002]
【従来の技術】この種のネジ締め機において、特に自動
化されたネジ締め機ではノーズ部にネジが順次供給さ
れ、打込み位置に送られたネジをドライバビットにより
打出してネジ締め作業を行なうようになっている。該ネ
ジをドライバビットに係合させるように位置付けて保持
する手段としては、ネジを打込み位置に吸引作用で順次
落とし込むガイドパイプを備えた、いわゆるパイプ式構
造のものと、打込み位置に落とし込まれたネジを一時的
に把持する、いわゆるチャック式のチャック機構とが見
られる。2. Description of the Related Art In this type of screw tightening machine, particularly in an automated screw tightening machine, screws are sequentially supplied to a nose portion, and the screw sent to a driving position is driven by a driver bit to perform the screw tightening work. It has become. As means for positioning and holding the screw so as to be engaged with the driver bit, a so-called pipe type structure having a guide pipe for sequentially dropping the screw into the driving position by a suction action, and a structure in which the screw is dropped into the driving position A so-called chuck type chuck mechanism that temporarily holds screws can be seen.
【０００３】上記構造の内、例えばチャック機構につい
ては、特公昭５１−１５６３８号に開示されている。Of the above structures, for example, a chuck mechanism is disclosed in Japanese Patent Publication No. 51-15638.
【０００４】[0004]
【考案が解決しようとする課題】上記いずれの構造にお
いても、ネジ締め部位に深穴ザグリや段差がある場合に
は、ネジ締め機の先端部がこれら部分に影響されてネジ
をネジ締め部位にまで充分に位置付けることが困難であ
った。In any of the above structures, when there is a deep hole counterbore or a step in the screw tightening part, the tip of the screw tightening machine is affected by these parts and the screw is screwed to the screw tightening part. It was difficult to position it sufficiently.
【０００５】例えば、チャック機構にあっては、この解
決の為に、ノーズ部においてドライバビットの先端部に
ネジ頭部を係合させた状態で該ドライバビットをノーズ
部より外方に、より長く突出させることにより対処する
構成も考えられている。上述した特公昭５１−１５６３
８号には、これに対応する構造が開示され、一対のチャ
ック部材の先端部にネジを把持し、これをドライバビッ
トの先端部に係合させ、ネジ頭部を押し出す動作によっ
てチャック部材を開成して該ネジ頭部をドライバビット
と一緒に外方に突出させる構成となっている。For example, in the chuck mechanism, in order to solve this problem, the driver bit is extended to the outside of the nose portion while the screw head is engaged with the tip of the driver bit in the nose portion. A configuration that deals with the problem by making it protrude is also considered. Japanese Patent Publication No. 51-1563
No. 8 discloses a structure corresponding to this, in which a screw is gripped at the tip of a pair of chuck members, the screw is engaged with the tip of a driver bit, and the chuck head is pushed out to open the chuck member. Then, the screw head is projected outward together with the driver bit.
【０００６】このチャック構造においては、ネジ頭部を
保持する円錐形状のテーパ支持面、すなわちドライバビ
ットの軸線方向においてドライバビットの先端側に向っ
て径が小さくなったテーパ支持面及びこれに続いてチャ
ック部材の開口端までの間、ネジの軸部を支持する同径
の小径支持面が設けられている。この構造では、ネジ頭
部が押し出される際、テーパ支持面から小径支持面に移
り、該支持面の開口端縁から外方に突出する際、チャッ
ク部材の開口端縁が閉成方向へ向うバネ付勢力によりネ
ジ頭部に、いわゆるはじき出すような外力を加える為
に、ネジがネジ締め部位に達する前にドライバビット先
端部より外れて落下する恐れがあった。特に、ネジ頭部
には丸みをつけたものが多い為に、開口端縁との間でカ
ム作用が働き、はじき出される傾向が一層強いものであ
った。In this chuck structure, a conical taper supporting surface for holding the screw head, that is, a taper supporting surface having a smaller diameter toward the tip side of the driver bit in the axial direction of the driver bit, and the following. A small-diameter support surface having the same diameter is provided up to the opening end of the chuck member for supporting the shaft portion of the screw. In this structure, when the screw head is pushed out, it moves from the tapered support surface to the small diameter support surface, and when it projects outward from the opening edge of the support surface, the opening edge of the chuck member faces the closing direction. Since a so-called repulsive external force is applied to the screw head due to the urging force, there is a risk that the screw may fall off the tip of the driver bit before reaching the screw tightening portion. In particular, since many screw heads are rounded, a cam action works between them and the opening edge, and the tendency to be repelled is even stronger.
【０００７】本考案は、特に上述したチャック機構にお
けるネジの打出し時における問題を解消し、深穴ザグリ
等の狭所や段差部などのあるネジ締め位置においてもネ
ジを確実に位置づけることのできるネジ締め機における
チャック機構を提供するにある。The present invention solves the above-mentioned problems when the screw is driven in the chuck mechanism, and can reliably position the screw even in a screw tightening position where there is a narrow portion such as a deep hole counterbore or a step portion. It is to provide a chuck mechanism in a screw tightener.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本考案においては、対向する少なくとも一対の開閉
自在なチャック部材を支持するノーズ部と、ドライバビ
ット、との軸線方向に沿う相対移動によって、ノーズ部
に供給されたネジを、該ネジの頭部にドライバビット先
端部を係合させることによって該ノーズ部より該チャッ
ク部材を介して外方に突出させてネジ締め動作を遂行す
るネジ締め機において、前記チャック部材の対向内面
に、ドライバビットの軸線方向における先端側に向って
該チャック部材の中間部に形成した最小径支持面に達す
るまで徐々に小径となる第１のテーパ支持面と、該第１
のテーパ支持面と該最小径支持面を介して連接し、ドラ
イバビットの軸線方向における先端側に向って該チャッ
ク部材の開口端まで徐々に大径となる第２のテーパ支持
面とを設け、該第２のテーパ支持面の開口端における径
を、ドライバビットが前記最小径支持面に係合して押し
開けられた状態においてネジ頭部外周面と係合しない程
度に大きく設定したことを特徴とするネジ締め機におけ
るチャック機構を提案するものである。In order to achieve the above object, according to the present invention, a relative movement of a nose portion supporting at least a pair of openable and closable chuck members facing each other and a driver bit along an axial direction. The screw supplied to the nose portion is caused to protrude outward from the nose portion through the chuck member by engaging the driver bit tip portion with the head portion of the screw to perform the screw tightening operation. In the fastener machine, a first taper support surface on the opposing inner surface of the chuck member, the diameter of which gradually decreases toward the tip end side in the axial direction of the driver bit until reaching a minimum diameter support surface formed in an intermediate portion of the chuck member. And the first
And a second taper support surface that is connected to the taper support surface via the minimum diameter support surface and gradually increases in diameter toward the tip end side in the axial direction of the driver bit to the opening end of the chuck member, The diameter at the opening end of the second taper support surface is set to be large enough not to engage with the outer peripheral surface of the screw head when the driver bit is engaged with the minimum diameter support surface and pushed open. The present invention proposes a chuck mechanism for a screw tightener.
【０００９】[0009]
【作用】上記構成の本考案のチャック機構によれば、チ
ャック部材の対向内面の中間に設けた最小径支持面に続
いて開口端までの間に第２のテーパ支持面を設け、この
第２のテーパ支持面にネジ頭部を係合させながら、突出
方向に移動させ、該ネジ頭部がチャック部材の開口端よ
り離れる際には、この第２のテーパ支持面は、ドライバ
ビットが最小径支持面に係合していることによりバネ付
勢に抗して閉成方向の移動が阻止されている為に、スム
ーズな離脱がなされる。この為に、ネジ頭部は該チャッ
ク部材により、外方にはじき出される力を受けないの
で、ネジがドライバビットとの係合から不用意に外され
る恐れがなく、所望のネジ締め部位までネジ締め部位周
辺の形状に影響されず、確実にネジを案内することがで
き、ネジ締め機の自動化設計も容易となる。According to the chuck mechanism of the present invention having the above structure, the second taper support surface is provided between the minimum diameter support surface provided in the middle of the facing inner surfaces of the chuck member and up to the opening end. When the screw head is moved in the projecting direction while being engaged with the taper support surface of the chuck head and the screw head is separated from the opening end of the chuck member, the second taper support surface has a minimum diameter of the driver bit. The engagement with the support surface prevents movement in the closing direction against the bias of the spring, so that smooth disengagement is achieved. For this reason, the screw head is not subjected to the force of being pushed outward by the chuck member, so there is no risk of the screw being inadvertently disengaged from the engagement with the driver bit, and the screw is tightened to the desired screw tightening site. The screw can be reliably guided without being affected by the shape around the tightened portion, and the automation design of the screw tightener becomes easy.
【００１０】[0010]
【実施例】図１には本考案の実施例のネジ締め機の先端
部のみを示してあり、図において、１０はネジ締め機の
本体、１２は該本体１０に軸線Ｘ−Ｘに沿い回転駆動可
能に配置されたドライバビット、１４は軸線Ｘ−Ｘに沿
い本体１０と相対的に移動可能なノーズ部をなすノーズ
部材、１６はそのノーズ部材１４上に枢支軸１８を介し
てそれぞれ取着され、ノーズ部材１４との間に介挿され
た圧縮コイルバネ２０により絶えず閉成方向にバネ付勢
されたチャック機構を構成する一対のチャック部材であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows only the tip of a screw tightening machine according to an embodiment of the present invention. In the drawing, 10 is the main body of the screw tightening machine, and 12 is the main body 10 which rotates along the axis X--X. A drivable driver bit, 14 is a nose member that is movable relative to the main body 10 along the axis X-X, and 16 is mounted on the nose member 14 via a pivot shaft 18. A pair of chuck members that constitute a chuck mechanism that is attached and is constantly biased in the closing direction by a compression coil spring 20 that is interposed between the chuck member and the nose member 14.
【００１１】ノーズ部材１４内にはドライバビット１２
の作動通路２２を挟んで左右に送りホイール２４を備え
たネジ供給機構２６が設けられ、該供給機構２６によっ
て、ネジ２８を列装した連結帯３０がネジ締め動作に連
動して間欠的に送られて１個ずつネジ２８をドライバビ
ット１２の先端部１２ａに対応する打込み位置３２に送
り込むようになっている。各送りホイール２４は連結帯
３０の対応する歯付き側縁３０ａに係合し、該ホイール
２４の間欠回転により連結帯３０を送るようになってい
るが、該ホイール２４を回転駆動する駆動機構はこの種
のホイールを備えた公知のネジ供給機構の場合と同様の
ものを適用し得るので図示を省略してある。A driver bit 12 is provided in the nose member 14.
The screw supply mechanism 26 having the feed wheels 24 on the left and right sides of the operating passage 22 is provided, and the supply band 26 intermittently feeds the connection band 30 in which the screws 28 are arranged in conjunction with the screw tightening operation. The screws 28 are fed one by one to the driving position 32 corresponding to the tip portion 12a of the driver bit 12. Each feed wheel 24 engages with the corresponding toothed side edge 30a of the connecting belt 30 to feed the connecting belt 30 by intermittent rotation of the wheel 24. Illustration is omitted because the same as in the case of a known screw supply mechanism including a wheel of this type can be applied.
【００１２】一対のチャック部材１６は、通常、バネ２
０によって図１に示す軸線Ｘ−Ｘのところで互いに閉じ
合わされた閉成位置にある。この状態において、両部材
１６によって横断面円形となる対向内面３２が形成され
ている。該対向内面３２には、ドライバビット１２の軸
線Ｘ−Ｘ方向における先端部１２ａの側に向って（図１
において下方に向って）徐々に小径となる第１のテーパ
支持面３２ａと、該支持面３２ａの下端部に連接し、該
対向内面３２の中間部に設けられた同径状の最小径支持
面３２ｂと、上端部がこれに連接するとともに該チャッ
ク部材１６の開口端１６ａまで徐々に大径となる第２の
テーパ支持面３２ｃが形成されている。両チャック部材
１６が図１のごとく閉成位置にあるとき、第１のテーパ
支持面３２ａ及び第２のテーパ支持面３２ｃにより、そ
れぞれ向きが逆の円錐面が形成されるとともに最小径支
持面３２ｂにより円筒内周面が形成される。The pair of chuck members 16 are usually springs 2.
0 in the closed position closed to each other at the axis XX shown in FIG. In this state, both members 16 form the facing inner surface 32 having a circular cross section. The facing inner surface 32 faces the tip portion 12a side in the direction of the axis XX of the driver bit 12 (see FIG. 1).
A first taper support surface 32a having a gradually smaller diameter, and a minimum diameter support surface of the same diameter, which is connected to the lower end of the support surface 32a and is provided in the middle of the opposing inner surface 32. 32b and a second taper support surface 32c whose upper end portion is connected to the second taper support surface 32c and whose diameter gradually increases to the opening end 16a of the chuck member 16 are formed. When both chuck members 16 are in the closed position as shown in FIG. 1, the first taper support surface 32a and the second taper support surface 32c form conical surfaces of opposite directions and the smallest diameter support surface 32b. This forms the inner peripheral surface of the cylinder.
【００１３】図２にはネジ締め機全体の概要をネジ締め
作業の態様で示してある。図示のごとく、ネジ締め作業
時に、ドライバビット１２はノーズ部材１４よりチャッ
ク部材１６を介して、その先端部１２ａが長く突出し、
先端部にネジ頭部２８ａを係合させたネジ２８を建材３
４等の部材のネジ締め部位３６に位置づけることができ
る。このネジ締め部位３６が図示のごとく深穴ザグリ状
となっている場合でも、ドライバビット１２が外方に長
く突出することにより該部位３６の形状に影響を受け
ず、ネジ２８を導入できる。FIG. 2 shows an outline of the entire screw tightening machine in the form of screw tightening work. As shown in the drawing, at the time of screw tightening work, the driver bit 12 has its tip 12a protruding longer than the nose member 14 via the chuck member 16,
The screw 28 having the screw head 28a engaged with the tip end of the building material 3
It can be positioned at the screw tightening portion 36 of a member such as 4. Even if the screw tightening portion 36 has a counterbore shape with a deep hole as shown in the drawing, the screw 28 can be introduced without being affected by the shape of the portion 36 due to the driver bit 12 projecting outward long.
【００１４】ネジ締め機のノーズ部材１４には、ネジ２
８を列装した連結帯３０が矢印方向に順次給送され、ド
ライバビット１２で１本ずつネジ２８を打出した後、帯
３０のみが排出される。ネジ締め作業の開示に当って作
業者が本体上のレバー４０を押下げるとスイッチ４２が
作動して、内部の駆動モータ４４が駆動され、ドライバ
ビット１２が回転駆動され、これと同時に、ノーズ部材
１４がチャック部材１６と共に本体１０方向に引込ま
れ、ドライバビット１２の先端部１２ａが打込み位置に
あるネジ２８の頭部２８ａに係合して連結帯３０より該
ネジ２８を引きはがし、図２で示すごとく、外方に突出
させるようになっている。The screw 2 is attached to the nose member 14 of the screw tightener.
The connecting strips 30 in which 8 are arranged are sequentially fed in the direction of the arrow, and after the screws 28 are driven by the driver bit 12 one by one, only the strips 30 are discharged. Upon disclosure of the screw tightening work, when a worker pushes down the lever 40 on the main body, the switch 42 operates, the internal drive motor 44 is driven, and the driver bit 12 is rotationally driven. At the same time, the nose member is driven. 14 is pulled together with the chuck member 16 in the direction of the main body 10, the tip portion 12a of the driver bit 12 is engaged with the head portion 28a of the screw 28 at the driving position, and the screw 28 is peeled off from the connecting band 30. As shown, it is projected outward.
【００１５】次に、ドライバビット１２によりネジ２８
を打出す際のチャック機構の動作を以下、図３ないし図
６に基づき説明する。Next, the screw 28 is set by the driver bit 12.
The operation of the chuck mechanism at the time of hitting will be described below with reference to FIGS.
【００１６】ネジ締め作業開始に当って、前述の通りド
ライバビット１２がノーズ部材１４と相対的に軸線Ｘ−
Ｘ方向に移動して先端部１２ａがネジ２８の頭部２８ａ
に係合し、連結帯３０より引きはがし、チャック部材１
６の対向内面３２へとネジ２８を押出す。これにより、
ネジ２８は図３に示すようにネジの軸部２８ｂが最小径
支持面３２ｂの間に進入すると共に頭部２８ａが第１の
テーパ支持面３２ａに係合し、ドライバビット１２の押
出し力により両チャック部材１６がバネ２０の付勢に抗
して閉成位置から徐々に左右に開かれ、遂には該頭部２
８ａが図４に示すごとく、最小径支持面３２ｂにより支
持された最大の開成状態となる。そして、ネジ２８が更
に押出されると、ネジ頭部２８ａが図５で示すごとく、
第２のテーパ支持面３２ｃへと係合領域が移行する。At the start of the screw tightening work, the driver bit 12 is moved relative to the nose member 14 along the axis X- as described above.
The tip portion 12a moves in the X direction and the tip portion 12a is the head portion 28a of the screw 28.
And is peeled off from the connecting band 30, and the chuck member 1
The screw 28 is extruded onto the opposing inner surface 32 of 6. This allows
As shown in FIG. 3, the shaft 28b of the screw 28 enters between the minimum diameter support surfaces 32b, and the head 28a engages with the first tapered support surface 32a. The chuck member 16 is gradually opened to the left and right from the closed position against the bias of the spring 20, and finally the head 2
As shown in FIG. 4, 8a is in the maximum open state supported by the minimum diameter support surface 32b. Then, when the screw 28 is further pushed out, the screw head portion 28a is, as shown in FIG.
The engagement area moves to the second tapered support surface 32c.
【００１７】ネジ頭部２８ａは第２のテーパ支持面３２
ｃと係合しながら開口端１６ａへ向って移動する間、該
テーパ支持面の傾斜角度が軸線Ｘ−Ｘに対してわずかの
角度をなす状態にあるため、図５に矢印Ｐで示すごと
く、該テーパ支持面を介してチャック部材１６がバネ２
０の付勢力をネジ頭部２８ａに及ぼす作用方向Ｐは軸線
Ｘ−Ｘに対し直角の半径方向に近い。この為、ネジ頭部
２８ａにバネ付勢力よって及ぼされる押出し方向の分力
は極めて小さいものとなる。従って、ネジ頭部２８ａと
ドライバビット先端部１２ａとの係合力が充分に維持さ
れ、この間にネジ２８がドライバビット１２から外れる
恐れがない。The screw head 28a has a second taper support surface 32.
While moving toward the open end 16a while engaging with c, the inclination angle of the taper support surface is in a state of forming a slight angle with respect to the axis line XX, so that as shown by an arrow P in FIG. The chuck member 16 is connected to the spring 2 via the taper supporting surface.
The acting direction P exerting a biasing force of 0 on the screw head portion 28a is close to the radial direction perpendicular to the axis line XX. Therefore, the component force in the pushing direction exerted on the screw head portion 28a by the spring biasing force is extremely small. Therefore, the engaging force between the screw head portion 28a and the driver bit tip portion 12a is sufficiently maintained, and there is no fear that the screw 28 will come off from the driver bit 12 during this period.
【００１８】このようにしてネジ頭部２８ａが第２のテ
ーパ支持面３２ｃ上を移行するにつれ、両チャック部材
１６は徐々に閉成方向に移動するが、その移動はドライ
バビット１２によりある程度のところで止められる。す
なわち、ドライバビット１２が最小径支持面３２ｂのと
ころに進入して該ビットの外周面と支持面３２ｂとが係
合した状態で両チャック部材１６の閉成移動は止められ
る。そして、この状態でネジ２８はドライバビット先端
部１２ａに係合したまま外方へ移動するので、図６に示
すごとく、遂には該ネジ頭部２８ａが第２のテーパ支持
面３２ｃより自然に離れ、更にドライバビット１２が突
出することにより図２に示すごとくネジ２８を所望のネ
ジ締め位置へ位置づけることができる。In this way, as the screw head portion 28a moves on the second taper support surface 32c, both chuck members 16 gradually move in the closing direction, but the movement is made to some extent by the driver bit 12. Can be stopped. That is, the closing movement of both chuck members 16 is stopped in a state where the driver bit 12 enters the minimum diameter support surface 32b and the outer peripheral surface of the bit and the support surface 32b are engaged. Then, in this state, the screw 28 moves outward while being engaged with the driver bit tip portion 12a, so as shown in FIG. 6, the screw head portion 28a finally separates naturally from the second taper support surface 32c. Further, by projecting the driver bit 12, the screw 28 can be positioned at a desired screw tightening position as shown in FIG.
【００１９】このように、本考案のチャック機構では特
にチャック部材１６に開口端１６ａに達するまで第２の
テーパ支持面３２ｃを設けて、ネジ頭部２８ａに対する
チャック部材１６の離脱動作を極めてゆるやかに行なう
ようにした為に、従来のこの種チャック機構におけるご
とくチャック部材にかかるバネ付勢力によってネジがは
じき出される現象が解消され、チャック部材からの離脱
時にドライバビットからネジが外れる等の恐れがないも
のである。As described above, in the chuck mechanism of the present invention, in particular, the second taper support surface 32c is provided on the chuck member 16 until the opening end 16a is reached so that the chuck member 16 can be detached from the screw head 28a very gently. Since this is done, the phenomenon that the screw is repelled by the spring biasing force applied to the chuck member as in the conventional chuck mechanism of this kind is eliminated, and there is no fear that the screw will come off from the driver bit when detached from the chuck member. Is.
【００２０】なお、実施例では一対のチャック部材１６
を設けた構成を示したが、部材の数はこれに限定される
ものではない。又、チャック部材１６の対向内面３２も
必ずしも円筒内周面形状に限定されない。ネジ頭部２８
ａとの係合部分が上述したごとき支持面３２ａ，３２
ｂ，３２ｃになっていればよい。更に、最小径支持面３
２ｂは両テーパ支持面３２ａ，３２ｃの接続線のみが表
われて実質的な領域部分がない態様のものも含まれる。In the embodiment, a pair of chuck members 16 are used.
However, the number of members is not limited to this. Further, the opposing inner surface 32 of the chuck member 16 is not necessarily limited to the cylindrical inner peripheral surface shape. Screw head 28
The support surface 32a, 32 whose engaging portion with a is as described above
It should be b, 32c. Furthermore, the minimum diameter support surface 3
2b also includes a mode in which only the connecting line between the tapered support surfaces 32a and 32c is shown and there is no substantial area portion.
【００２１】[0021]
【考案の効果】以上のように本考案によれば、チャック
部材に特に第２のテーパ支持面をチャック部材の開口端
までの間に形成した為に、ネジをドライバビットと係合
させた状態で外方へ押出す際に、ネジ頭部がチャック部
材からゆるやかにスムーズな離脱を行なうので、従来の
チャック式の構造における問題点があった、チャック部
材にかかるバネ付勢力によりネジをはじき出す現象が解
消され、より確実にネジを所望のネジ締め位置へ位置づ
けることができ、ネジ締め機の自動化設計も、より信頼
性の高いものになる等、種々の実用的効果を奏する。As described above, according to the present invention, since the second taper support surface is formed on the chuck member up to the opening end of the chuck member, the screw is engaged with the driver bit. When ejecting outward with, the screw head gently separates from the chuck member.Therefore, there was a problem in the conventional chuck type structure.Phenomenon that repels the screw due to the spring biasing force applied to the chuck member. Is eliminated, the screw can be more reliably positioned at a desired screw tightening position, and the automation design of the screw tightening machine has various practical effects such as higher reliability.
【図１】本考案に係る実施例のネジ締め機のチャック機
構を含む先端部の要部破断図である。FIG. 1 is a fragmentary cutaway view of a tip portion including a chuck mechanism of a screw tightening machine according to an embodiment of the present invention.
【図２】本考案に係る実施例のネジ締め機をネジ締め作
業の態様で示す全体概要図である。FIG. 2 is an overall schematic view showing a screw tightening machine of an embodiment according to the present invention in a mode of screw tightening work.
【図３】図１に示すチャック機構においてドライバビッ
トによりネジを打出す第１の動作説明図である。FIG. 3 is a first operation explanatory diagram of driving a screw by a driver bit in the chuck mechanism shown in FIG.
【図４】図１に示すチャック機構の第２の動作説明図で
ある。FIG. 4 is a second operation explanatory diagram of the chuck mechanism shown in FIG. 1.
【図５】図１に示すチャック機構の第３の動作説明図で
ある。5 is a third operation explanatory diagram of the chuck mechanism shown in FIG. 1. FIG.
【図６】図１に示すチャック機構の第４の動作説明図で
ある。6 is a fourth operation explanatory view of the chuck mechanism shown in FIG. 1. FIG.
１０ ネジ締め機本体 １２ ドライバビット １４ ノーズ部材 １６ チャック部材 ２８ ネジ ３２ 対向内面 ３２ａ 第１のテーパ支持面 ３２ｂ 最小径支持面 ３２ｃ 第２のテーパ支持面 10 screw tightener main body 12 driver bit 14 nose member 16 chuck member 28 screw 32 opposing inner surface 32a first taper support surface 32b minimum diameter support surface 32c second taper support surface
Claims (1)
ック部材を支持するノーズ部と、ドライバビット、との
軸線方向に沿う相対移動によって、ノーズ部に供給され
たネジを、該ネジの頭部にドライバビット先端部を係合
させることによって該ノーズ部より該チャック部材を介
して外方に突出させてネジ締め動作を遂行するネジ締め
機において、前記チャック部材の対向内面に、ドライバ
ビットの軸線方向における先端側に向って該チャック部
材の中間部に形成した最小径支持面に達するまで徐々に
小径となる第１のテーパ支持面と、該第１のテーパ支持
面と該最小径支持面を介して連接し、ドライバビットの
軸線方向における先端側に向って該チャック部材の開口
端まで徐々に大径となる第２のテーパ支持面とを設け、
該第２のテーパ支持面の開口端における径を、ドライバ
ビットが前記最小径支持面に係合して押し開けられた状
態においてネジ頭部外周面と係合しない程度に大きく設
定したことを特徴とするネジ締め機におけるチャック機
構。Claim: What is claimed is: 1. A screw supplied to a nose portion by a relative movement in the axial direction of a driver bit and a nose portion that supports at least a pair of openable and closable chuck members facing each other. In a screw tightening machine that engages a tip of a driver bit to project outward from the nose through the chuck member to perform a screw tightening operation, an inner surface of the chuck member facing the axial direction of the driver bit. Through the first taper support surface and the first taper support surface and the minimum diameter support surface, which gradually decrease in diameter until reaching the minimum diameter support surface formed in the intermediate portion of the chuck member toward the tip side of A second taper support surface gradually increasing in diameter toward the tip end side in the axial direction of the driver bit to the opening end of the chuck member.
The diameter at the opening end of the second taper support surface is set to be large enough not to engage with the outer peripheral surface of the screw head when the driver bit is engaged with the minimum diameter support surface and pushed open. Chuck mechanism in a screw tightener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991064088U JPH0746461Y2 (en) | 1991-07-19 | 1991-07-19 | Chuck mechanism in screw tightener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991064088U JPH0746461Y2 (en) | 1991-07-19 | 1991-07-19 | Chuck mechanism in screw tightener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH059835U JPH059835U (en) | 1993-02-09 |
| JPH0746461Y2 true JPH0746461Y2 (en) | 1995-10-25 |
Family
ID=13247977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991064088U Expired - Lifetime JPH0746461Y2 (en) | 1991-07-19 | 1991-07-19 | Chuck mechanism in screw tightener |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0746461Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101836775B1 (en) * | 2017-09-07 | 2018-03-08 | 김지원 | Stud-chuck for stud welding gun |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558987A (en) * | 1978-10-20 | 1980-05-02 | Tounichi Seisakusho Kk | Screw holding portion of automatic screw clamping machine |
| JPS5831967U (en) * | 1981-08-24 | 1983-03-02 | 日東精工株式会社 | Screw posture correction device for screw tightening machines |
| JPS643631A (en) * | 1987-06-26 | 1989-01-09 | Toshiba Corp | Liquid crystal display device |
-
1991
- 1991-07-19 JP JP1991064088U patent/JPH0746461Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH059835U (en) | 1993-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH05208305A (en) | Drill chuck | |
| KR20070025908A (en) | Tube expanding tool | |
| US20040022596A1 (en) | Fastener having integral drive nut | |
| US11738384B2 (en) | Setting tool for blind fasteners | |
| JPH0746461Y2 (en) | Chuck mechanism in screw tightener | |
| US20040216292A1 (en) | Tool for installing blind threaded fasteners | |
| ZA200406510B (en) | Set screw with rotating point. | |
| US11389933B2 (en) | Anti-topping impact tool mechanism | |
| JPH11216697A (en) | Spring balancer structure | |
| JP2001221244A (en) | Connection structure of yoke and shaft | |
| US4671143A (en) | Driver jaws for an automatic screw feeding machine | |
| JPH02145224A (en) | Automatic thread fastening device | |
| JP2008106857A (en) | Fastener | |
| WO2022097410A1 (en) | Hand, robot system, and control method of hand | |
| JP7261127B2 (en) | Shaft coupling and screw tightening device equipped with the same | |
| JP2022182371A (en) | Box bit and automatic fastening machine comprising the same | |
| JPS6131819Y2 (en) | ||
| JP2001073547A (en) | Automatic impulse generating drawing tool and its manufacture | |
| JP4071066B2 (en) | Work holding mechanism | |
| JPH04129954U (en) | Belt tension adjustment device | |
| JPH02131875A (en) | Tightening device for bolt | |
| JPS5845011Y2 (en) | impact wrench | |
| JP2004189326A (en) | Cap seamer | |
| JPH068073A (en) | Screw fastening device | |
| JP2021104559A5 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19961210 |
|
| EXPY | Cancellation because of completion of term |