JP2856079B2 - Double feed prevention mechanism in screw tightening machine for connecting screw - Google Patents
Double feed prevention mechanism in screw tightening machine for connecting screwInfo
- Publication number
- JP2856079B2 JP2856079B2 JP22867294A JP22867294A JP2856079B2 JP 2856079 B2 JP2856079 B2 JP 2856079B2 JP 22867294 A JP22867294 A JP 22867294A JP 22867294 A JP22867294 A JP 22867294A JP 2856079 B2 JP2856079 B2 JP 2856079B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- nose portion
- tightening machine
- locking
- nose
- 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】本発明は、連結ネジ用ネジ締め機
において、誤ってノーズ部を少し押し込んだ後に離した
り、十分にねじ込む前にネジ締め機をネジから離したり
することによりノーズ部に新たにネジが送られてしまう
のを防止する２本送り防止機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw tightening machine for a connecting screw, in which the nose is erroneously pushed in a little and then released, or the screw tightener is released from the screw before the screw is sufficiently screwed in. The present invention relates to a double feed prevention mechanism for preventing a new screw from being fed.
【０００２】[0002]
【従来技術】一般に、ネジ締め機本体に対して相対移動
するノーズ部に送りホイールを回転自在に支持させ、ノ
ーズ部のネジ締め機本体に対する押し込み移動に連動し
て送りホイールを回転させることによりノーズ部に供給
された連結ネジを送り出す方式のネジ締め機において
は、例えば作業者が面材を天井の下地材にねじ止めする
場合、面材の一側を片手で持ち、他方の手に持ったネジ
締め機の先端で面材の他側を押し上げるようなことがあ
るが、このときノーズ部が面材の荷重によりネジ締め機
本体に対して少し押し込まれ、この微小サイン（いわゆ
るチョンサイン）によって送りホイールが回転してネジ
が送り出されてしまう。したがって、ネジ締め機を面材
から離して所定の位置にねじ込みしようとすると、ノー
ズ部が面材に押し付けられたときに再び送りホイールが
回転し、新しいネジが送り出される。このため、最初に
送り出されたネジが無駄になってしまうほか、狭いスペ
ースに２本のネジが入り込んでノーズ部内に詰まる現象
が発生することがある。2. Description of the Related Art Generally, a feed wheel is rotatably supported by a nose portion which moves relatively to a screw tightening machine main body, and the nose is rotated by rotating the feed wheel in conjunction with a pushing movement of the nose portion against the screw tightening machine main body. In the screw tightening machine of the type that feeds out the connection screw supplied to the part, for example, when an operator screws the face material to the base material of the ceiling, the operator holds one side of the face material with one hand and holds it with the other hand. Sometimes the tip of the screwing machine pushes up the other side of the face material. At this time, the nose part is slightly pushed into the screwing machine body by the load of the face material, and this small sign (so-called chon sign) The feed wheel rotates and the screw is fed out. Therefore, when the screw tightener is to be screwed into a predetermined position away from the face material, the feed wheel rotates again when the nose portion is pressed against the face material, and a new screw is fed. For this reason, the first screw fed out is wasted, and a phenomenon that two screws enter a narrow space and become jammed in the nose portion may occur.
【０００３】また、ネジ締め作業の際に、十分にネジを
ねじ込む前にノーズ部に対する押し込み荷重を解除して
しまうと、ネジが十分にねじ込まれず、ネジの頭部が面
材から浮き上がってしまう。したがって、ネジをさらに
ねじ込んで増し締め作業をする必要があるが、ノーズ部
を押し込み移動させると送りホイールが回転して自動的
に新たなネジが送られてしまうので、送られたネジを除
去してから増し締めをする必要があり、除去作業が面倒
であるとともに、ネジも無駄になるという問題があっ
た。Further, if the pushing load on the nose portion is released before the screw is sufficiently screwed in the screw tightening operation, the screw will not be screwed sufficiently and the head of the screw will rise from the face material. Therefore, it is necessary to further tighten the screw by screwing it in.However, when the nose part is pushed in and moved, the feed wheel rotates and a new screw is automatically sent. It is necessary to re-tighten afterwards, and there is a problem that the removing operation is troublesome and the screws are wasted.
【０００４】[0004]
【発明の目的】本発明は前記問題点を解消し、いったん
押し込んだノーズ部に対する押し込み力を解除してもノ
ーズ部が復帰移動しないようにすることにより、ネジの
２本送りを防止することができる防止機構を提供するこ
とをその目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to prevent the screw from being fed back by preventing the nose from returning even if the pushing force on the nose once pushed is released. It is an object of the present invention to provide a prevention mechanism which can be used.
【０００５】[0005]
【目的を達成するための手段】前記目的を達成するた
め、本発明に係る連結ネジ用ネジ締め機における２本送
り防止機構は、ドライバビットを備えたネジ締め機本体
の前部に、上記ドライバビットの軸方向に移動可能で常
時ネジ締め機本体から前方に移動するようにバネ付勢さ
れたノーズ部を設け、ノーズ部に送りホイールを回転自
在に支持させ、上記ノーズ部のネジ締め機本体に対する
押し込み移動に連動して送りホイールを回転させること
によりノーズ部に供給された連結ネジをドライバビット
の延長方向に送り出すネジ締め機において、上記ネジ締
め機本体とノーズ部には、ノーズ部をネジ締め機本体に
対して途中まで押し込み移動させた後に押し込み力を解
除したときに互いに係止する係止手段と、ノーズ部が所
定の移動量だけ押し込まれた後に上記バネによりネジ締
め機本体から復帰移動したときに上記両係止手段の係止
を回避させる案内手段とを形成したことを特徴とする。In order to achieve the above object, a double feed prevention mechanism in a screwing machine for a connecting screw according to the present invention comprises a screwdriver provided with a driver bit at a front portion of a main body of the screwing machine. A nose part which is movable in the axial direction of the bit and is always biased by a spring so as to move forward from the main body of the screw tightener is provided. The feed wheel is rotatably supported by the nose part. In the screwdriver that feeds the connection screw supplied to the nose portion in the extension direction of the driver bit by rotating the feed wheel in conjunction with the pushing movement of the screwdriver, the nose portion is screwed into the screwdriver body and the nose portion. Locking means that locks each other when the pressing force is released after being pushed halfway into the tightening machine body and the nose part is pushed by a predetermined amount of movement And characterized by forming a guide means for avoiding the locking of the Ryokakaritome means when return movement from the screw tightener body by the spring after or being.
【０００６】なお、前記係止手段の係止位置を、前記ノ
ーズ部をネジ締め機本体に対して１本分のネジ送りがな
される送り量だけ押し込み移動させた位置とするのが好
ましい。It is preferable that the locking position of the locking means is a position where the nose portion is pushed and moved by a feed amount by which one screw is fed to the screw tightening machine body.
【０００７】また、前記係止手段の係止位置を、前記ノ
ーズ部をネジ締め機本体に対して所定のねじ込み深さに
及ばない移動量だけ押し込み移動させた位置とするのが
好ましい。It is preferable that the locking position of the locking means is a position where the nose portion is pushed and moved relative to the screw tightening machine main body by a moving amount that does not reach a predetermined screwing depth.
【０００８】[0008]
【発明の作用、効果】請求項１の発明によれば、ネジ締
め作業にあたり、被ねじ込み材に対してノーズ部を押し
付けることによりノーズ部をネジ締め機本体に途中まで
押し込み移動させた後に、ノーズ部の押し付けを解除し
ても、ノーズ部とネジ締め機本体の係止手段が係止する
ので、ノーズ部の復帰移動が規制される。したがって、
再びノーズ部を被ねじ込み材に押し付けることにより、
送られたネジのねじ込み作業が行なわれる。According to the first aspect of the present invention, in the screw tightening operation, the nose is pushed halfway into the screw tightening machine body by pressing the nose against the material to be screwed, and then the nose is moved. Even when the pressing of the part is released, the nose part and the locking means of the screw tightening machine main body are locked, so that the return movement of the nose part is restricted. Therefore,
By pressing the nose part against the threaded material again,
The screwing operation of the sent screw is performed.
【０００９】また、ノーズ部が所定の移動量だけ押し込
まれてネジ締めが終了した後にネジ締め機本体から復帰
移動したときには、上記両係止手段は案内手段により互
いに係止を回避するように案内される。Further, when the nose portion is pushed in by a predetermined movement amount and the screwing operation is completed and the screwing machine is returned from the main body of the screw tightening machine, the two locking means are guided by the guiding means so as to avoid locking. Is done.
【００１０】このように、いったん押し付けてネジ送り
がなされた後にノーズ部を被ねじ込み材から離してもノ
ーズ部は復帰移動しないので、ネジの２本送りが有効に
防止される。As described above, even if the nose portion is separated from the material to be screwed after the screw is fed once by pressing, the nose portion does not return and move, so that the double feed of the screw is effectively prevented.
【００１１】請求項２の発明によれば、ネジ締め作業に
あたり、被ねじ込み材に対してノーズ部を押し付けるこ
とによりノーズ部はネジ締め機本体に押し込まれてネジ
１本分のネジ送りが行なわれる位置まで移動した後にノ
ーズ部の押し付けを解除しても、係止手段が係止するの
で、ノーズ部の復帰移動が規制される。再びノーズ部を
被ねじ込み材に押し付けても、ネジ送りは行なわれず、
既に送られたネジのねじ込みのみが行なわれる。したが
って、微小サインによって２本のネジが送られる不都合
が解消される。According to the second aspect of the present invention, in the screw tightening operation, the nose is pressed into the screw tightening machine body by pressing the nose against the material to be screwed, and the screw is fed by one screw. Even if the pressing of the nose is released after the nose is moved to the position, the locking means is locked, so that the return movement of the nose is restricted. Even if the nose part is pressed against the threaded material again, the screw feed is not performed,
Only the screws already fed are screwed on. Therefore, the inconvenience of sending two screws by the minute sign is eliminated.
【００１２】請求項３の発明によれば、ねじ込み作業の
途中で、ノーズ部をネジ締め機本体に対して所定のねじ
込み深さに及ばない移動量だけ押し込み移動させた後に
押し込み力を解除したときも係止手段が係止してノーズ
部の復帰移動が規制される。したがって、ネジの頭部が
被ねじ込み材から浮き上がっていたときは、上記ネジに
対して増し締めすることができる。According to the third aspect of the present invention, when the pushing force is released after the nose portion is pushed and moved relative to the screw tightening machine body by a moving amount less than a predetermined screwing depth during the screwing operation, Also, the locking means is locked so that the return movement of the nose portion is restricted. Therefore, when the head of the screw is raised from the material to be screwed in, the screw can be further tightened.
【００１３】[0013]
【実施例】図７(a) はネジ締め機の前部を示すもので、
符号１はネジ締め機本体、２はノーズ部を示す。ネジ締
め機本体１はドライバビット３とその回転駆動機構（図
示せず）を備え、ノーズ部２はネジ締め機本体１のノー
ズホルダ４にドライバビット３の軸方向に移動可能に保
持され、その左右の両側部に支持された回転軸６ａには
連結ネジ５を下から上に送り込む送りホイール６が回転
自在に設けられている。この送りホイール６は一方にの
み回転可能に構成されている。FIG. 7 (a) shows the front of a screw tightening machine.
Reference numeral 1 denotes a screw tightening machine main body, and 2 denotes a nose portion. The screwdriver body 1 includes a driver bit 3 and a rotation driving mechanism (not shown). The nose portion 2 is held by a nose holder 4 of the screwdriver body 1 so as to be movable in the axial direction of the driver bit 3. A feed wheel 6 that feeds the connection screw 5 upward from below is rotatably provided on a rotary shaft 6a supported on both sides of the feed shaft. The feed wheel 6 is configured to be rotatable only on one side.
【００１４】送りホイール６の側面には周方向に等間隔
に送り穴７が形成されている。そして、ネジ締め機本体
１とノーズ部２との間にはフィードプレート８が配置さ
れ、フィードプレート８の一端にはネジ締め機本体１と
ノーズ部２に形成された案内溝９、１０に係合するロー
ラ１１が設けられ、他端には上記送り穴７内に係脱する
係合ピン１１が設けられている。On the side surface of the feed wheel 6, feed holes 7 are formed at equal intervals in the circumferential direction. A feed plate 8 is disposed between the screwdriver body 1 and the nose portion 2, and one end of the feed plate 8 is engaged with guide grooves 9 and 10 formed in the screwdriver body 1 and the nose portion 2. A mating roller 11 is provided, and an engaging pin 11 that engages with and disengages from the feed hole 7 is provided at the other end.
【００１５】ネジ締め作業にあたり、ネジ締め機本体１
を前方に押し出してノーズ部２の先端を被ねじ込み材１
２に押し付けると、同図 (b)のようにノーズ部２が相対
的に後方に移動し、この相対移動に連動してフィードプ
レート８の一端のローラ１１がノーズ部２とネジ締め機
本体１の案内溝９、１０に案内されて移動するが、ノー
ズ部２の移動方向における移動量はノーズ部２の移動量
よりも小さいので、フィードプレート８の他端の係合ピ
ン１３は送りホイール６の送り穴７に係合した状態で送
りホイール６をノーズ部２の移動方向と反対側に押し付
けることになる。このため、送りホイール６は送り方向
に連結ネジ５のネジ１本分をドライバビット３の延長方
向に送るのに対応する回転角だけ回転する。さらにネジ
締め機本体１を前方に押していくと、ドライバビット３
が送り出されたネジに係合し、これを回転させながら被
ねじ込み材１２中にねじ込んでいく。In the screw tightening operation, the screw tightening machine body 1
Is pushed forward and the tip of the nose portion 2 is screwed into the material 1.
2, the nose portion 2 relatively moves rearward as shown in FIG. 3B, and the roller 11 at one end of the feed plate 8 moves with the nose portion 2 and the screw tightener body 1 in conjunction with this relative movement. Of the nose portion 2 in the movement direction is smaller than the movement amount of the nose portion 2, so that the engagement pin 13 at the other end of the feed plate 8 is moved by the feed wheel 6. When the feed wheel 6 is engaged with the feed hole 7, the feed wheel 6 is pressed in the direction opposite to the moving direction of the nose portion 2. For this reason, the feed wheel 6 rotates by a rotation angle corresponding to sending one screw of the connecting screw 5 in the extension direction of the driver bit 3 in the feed direction. When the screwdriver body 1 is further pushed forward, the driver bit 3
Engages with the fed screw and is screwed into the screwed material 12 while rotating the screw.
【００１６】ねじ込み後にネジ締め機をネジから離す
と、バネ１４によりノーズ部２は元の位置に復帰移動す
るので、フィードプレート８のローラ１１は最後に案内
溝９の傾斜短溝９ａとノーズ部２の案内溝９に案内され
て移動するが、ノーズ部２の移動方向における移動量よ
りも小さいので、フィードプレート８の係合ピン１１は
バネに抗して後退しながら送り穴７から脱離した後次位
の送り穴７上に移動し、バネ付勢によりこの送り穴７に
係合し、次の送りが準備される。なお、図示しない逆転
防止機構により送りホイール６の逆転は防止される。When the screw tightening machine is released from the screw after screwing, the nose portion 2 is returned to the original position by the spring 14, so that the roller 11 of the feed plate 8 is finally connected to the inclined short groove 9a of the guide groove 9 and the nose portion. The nose portion 2 is moved by being guided by the guide groove 9, but is smaller than the moving amount of the nose portion 2 in the moving direction. Then, it moves onto the next feed hole 7 and engages with this feed hole 7 by the bias of the spring, so that the next feed is prepared. The reverse rotation of the feed wheel 6 is prevented by a reverse rotation preventing mechanism (not shown).
【００１７】以上のように、ノーズ部２がネジ締め機本
体１に対して押し込み移動することに連動して連結ネジ
５の送りが行なわれるが、上記ネジ締め機本体１とノー
ズ部２には、ノーズ部２をネジ締め機本体１に対して途
中まで押し込み移動させた後に押し込み力を解除したと
きに互いに係止する係止手段と、ノーズ部２が所定の移
動量だけ押し込まれた後に上記バネによりネジ締め機本
体１から復帰移動したときに上記両係止手段の係止を回
避するように案内する案内手段とが形成されている。As described above, the connection screw 5 is fed in conjunction with the nose portion 2 being pushed into the screw tightening machine main body 1, and the screw tightening machine main body 1 and the nose portion 2 are fed. A locking means for locking the nose portion 2 to each other when the nose portion 2 is pushed halfway into the screw tightening machine body 1 and then releasing the pushing force; Guide means are provided for guiding the locking means so as to avoid locking of the locking means when returning from the screw tightening machine main body 1 by a spring.
【００１８】すなわち、図１(a) (b) 〜図３に示される
ように、ノーズ部２の側部に固定されたフィードプレー
トガイド１５のＬ形取付部１６の側壁１６ａには支軸１
７が突設され、支軸１７には係止爪１８が横方向に回動
自在に支持され、係止爪１８は支軸１７に設けられたバ
ネ１９により先端の爪部２０が外側に回動するように付
勢されている。なお、係止爪１８は薄板材から形成さ
れ、上記バネ１９により通常はＬ形取付部１６の側壁１
６ａに当接するように付勢されている。That is, as shown in FIGS. 1 (a), 1 (b) to 3, the support shaft 1 is attached to the side wall 16a of the L-shaped mounting portion 16 of the feed plate guide 15 fixed to the side of the nose portion 2.
7, a locking claw 18 is supported on the support shaft 17 so as to be rotatable in the lateral direction, and the locking claw 18 is turned outward by a spring 19 provided on the support shaft 17. It is biased to move. The locking claw 18 is formed of a thin plate material, and is normally formed by the spring 19 on the side wall 1 of the L-shaped mounting portion 16.
6a.
【００１９】これに対し、ネジ締め機本体１の側部に
は、ノーズ部２の係止爪１８の爪部２０の移動軌跡上に
第１の係止部２１と第２の係止部２２が形成されてい
る。第１の係止部２１はノーズ部２をネジ締め機本体１
に対してネジ送りされる送り量だけ押し込み移動させた
後に押し込み力を解除したときに上記係止爪１８に係止
可能な位置に設けられている。第２の係止部２２はノー
ズ部２をネジ締め機本体１に対して所定のねじ込み深さ
に及ばない移動量だけ押し込み移動させた後に押し込み
力を解除したときに上記係止爪１８に係止可能な位置に
設けられている。On the other hand, on the side of the screw tightening machine main body 1, the first locking portion 21 and the second locking portion 22 are located on the movement locus of the claw portion 20 of the locking claw 18 of the nose portion 2. Are formed. The first locking portion 21 is used to connect the nose portion 2 to the screw tightening machine body 1.
When the push-in force is released after the push-in movement is performed by the feed amount that is screw-fed with respect to, the lock-up claw 18 is provided at a position where it can be locked. The second locking portion 22 engages with the locking claw 18 when the pushing force is released after the nose portion 2 is pushed into the screw tightening machine main body 1 by a moving amount less than a predetermined screwing depth and then released. It is provided at a position where it can be stopped.
【００２０】次に、ネジ締め機本体１のノーズホルダ４
の側壁２４には、ノーズ部２が上記バネ１４に抗してネ
ジ締め機本体１に対して押し込み移動させたときに上記
係止爪１８が上記係止部２１、２２に係止可能に案内す
る第１の案内溝２５と、ノーズ部２が所定の移動量だけ
押し込まれた後にノーズ部２が上記バネ１４によりネジ
締め機本体１から復帰移動したときには、上記上記係止
爪１８が上記係止部２１、２２から退避するように案内
する第２の案内溝２６が形成されている。第２の案内溝
２６は第１及び第２の係止部２２上を通らないように形
成されている。第１の案内溝２５と第２の案内溝２６と
はループ状に連続している。また、第１及び第２の案内
溝２６の溝底は図３のように傾斜して係止爪１８（直接
には爪部２０）を案内する凸部が形成されている。第１
凸部２７と第２凸部２８とは係止爪１８を第１の係止部
２１と第２の係止部２２に係止しやすいように案内する
ものであり、第３凸部２９はいったんここを乗り越えた
係止爪１８が逆方向に移動したときに再び第１の案内溝
２５上に移動しないように、さらに第２の案内溝２６の
第４凸部３０はここを乗り越えた係止爪１８が逆方向に
移動してきたとき再び第２の案内溝２６上に移動しない
ようにするためのものである。Next, the nose holder 4 of the screw tightening machine body 1
The locking claw 18 is guided on the side wall 24 so that the locking claw 18 can be locked to the locking portions 21 and 22 when the nose portion 2 is pushed and moved against the screw tightening machine main body 1 against the spring 14. When the nose portion 2 is returned from the screw tightening machine body 1 by the spring 14 after the first guide groove 25 and the nose portion 2 are pushed in by a predetermined movement amount, the locking claw 18 A second guide groove 26 is formed to guide the evacuation from the stop portions 21 and 22. The second guide groove 26 is formed so as not to pass over the first and second locking portions 22. The first guide groove 25 and the second guide groove 26 are continuous in a loop. Further, the groove bottoms of the first and second guide grooves 26 are inclined as shown in FIG. 3 to form convex portions for guiding the locking claws 18 (directly, the claw portions 20). First
The convex portion 27 and the second convex portion 28 guide the locking claw 18 so as to be easily locked to the first locking portion 21 and the second locking portion 22, and the third convex portion 29 The fourth protrusion 30 of the second guide groove 26 further engages with the engaging member so as to prevent the locking claw 18 having once climbed over the first guide groove 25 from moving over the first guide groove 25 again in the reverse direction. This is to prevent the stop claw 18 from moving onto the second guide groove 26 again when the stop claw 18 moves in the reverse direction.
【００２１】前記構成において、ネジ締め作業をすると
きは、前述のように被ねじ込み材に対してノーズ部２を
押し付けることによりノーズ部２をネジ締め機本体１に
押し込むと、係止爪１８も図２に示されるように、第１
の案内溝２５に沿って摺動し、第３凸部２９を越えた後
に第２の案内溝２６に移行する。そして、ネジ締め終了
後にノーズ部２をネジから離した後は、ノーズ部２はバ
ネの力により復帰移動するとともに、係止爪１８も元の
位置に移動し、ノーズ部２が初期位置に戻ったとき係止
爪１８も第４凸部３０を越えて再び第１の案内溝２５に
戻る。In the above structure, when the screw is tightened, the nose portion 2 is pushed into the screw tightening machine body 1 by pressing the nose portion 2 against the material to be screwed as described above, and the locking claw 18 is also moved. As shown in FIG.
Slides along the second guide groove 25 and moves to the second guide groove 26 after passing over the third convex portion 29. Then, after the nose portion 2 is separated from the screw after the screw tightening is completed, the nose portion 2 returns and moves by the force of the spring, and the locking claw 18 also moves to the original position, and the nose portion 2 returns to the initial position. Then, the locking claw 18 also returns to the first guide groove 25 over the fourth protrusion 30.
【００２２】ところで、ノーズ部２をネジ締め機本体１
に押し込んで図１(a) (b) の初期位置から図４の位置
（図２、図３の点Ａの位置）に移動させると、この時点
で既に送りホイール６が回転してネジ送りが行なわれる
が、ここでノーズ部２の押し付けを解除しても、係止爪
１８が第１の係止部２１に係止するので、ノーズ部２の
復帰移動が規制される。再びノーズ部２を被ねじ込み材
に押し付けることにより、送られたネジのねじ込み作業
が行なわれる。By the way, the nose portion 2 is connected to the screw tightening machine main body 1.
1 (a) and (b) from the initial position to the position in FIG. 4 (the position of point A in FIGS. 2 and 3), the feed wheel 6 has already rotated at this point, and the screw feed is started. In this case, even if the pressing of the nose portion 2 is released, the return movement of the nose portion 2 is restricted because the locking claw 18 is locked to the first locking portion 21. By pressing the nose portion 2 against the material to be screwed again, the screwing operation of the fed screw is performed.
【００２３】このように、誤ってノーズ部２を押し込ん
でしまったためにネジが送られても、再度のノーズ部２
の押し付けによりネジが送られることがないので、微小
サインによって２本のネジが送られる不都合が解消され
る。As described above, even if the screw is fed due to the nose part 2 being pushed in by mistake, the nose part 2 is
The screw is not sent by the pressing, so that the inconvenience of sending two screws by the minute sign is eliminated.
【００２４】次に、ねじ込み作業の途中で、図５のよう
にノーズ部２をネジ締め機本体１に対して所定のねじ込
み深さに及ばない移動量だけ押し込み移動させた（図
２、図３の点Ｂの位置でネジ３１の頭部が被ねじ込み材
１２から浮き上がっている）後に押し込み力を解除して
しまうと、係止爪１８は第３凸部２９を越えていないの
で、第１の案内溝２５上にあり、ノーズ部２は少し戻り
移動したとき図６に示されるように、係止爪１８が第２
の係止部２２に係止する（図２、図３の点Ｃの位置）。
このため、上述と同様にノーズ部２の復帰移動が規制さ
れる。したがって、この場合は、ノーズ部２からカバー
３３を外した後、ドライバビット３を浮き上がったネジ
３１の頭部にねじ込んで上記ネジに対して増し締めする
ことができる。Next, during the screwing operation, the nose portion 2 was pushed into the screw tightening machine main body 1 by a movement amount less than a predetermined screwing depth as shown in FIG. 5 (FIGS. 2 and 3). If the pushing force is released after the head of the screw 31 is lifted from the screwed material 12 at the position of the point B, since the locking claw 18 does not exceed the third convex portion 29, the first When the nose portion 2 is slightly returned and moves on the guide groove 25, as shown in FIG.
(The position of point C in FIGS. 2 and 3).
For this reason, the return movement of the nose part 2 is restricted as described above. Therefore, in this case, after removing the cover 33 from the nose portion 2, the driver bit 3 can be screwed into the head of the raised screw 31 to further tighten the screw.
【００２５】このように、いったん押し付けてネジ送り
がなされた後にノーズ部２を被ねじ込み材から離しても
ノーズ部２は復帰移動しないので、ネジの２本送りが有
効に防止される。したがって、ネジ送りされたネジに対
して確実にねじ込みや増し締めをすることができる。As described above, even if the nose portion 2 is separated from the threaded member after the screw is fed by pressing once, the nose portion 2 does not return, so that the double feed of the screw is effectively prevented. Therefore, it is possible to securely screw or retighten the screw fed.
【００２６】ところで、上述のネジ込み作業時に、ノー
ズ部２をネジ締め機本体１に対して押しこみ移動させる
ときは、ノーズ部２とともに係止爪１８は図２のように
ネジ締め機本体１の第１の案内溝２５に沿って案内され
るが、第１の係止部２１に至る直前に第１凸部２７に案
内されてバネに抗して回動した後に第１の係止部２１に
係止するので、係止が円滑に行なわれる。係止爪１８が
第２の係止部２２に係止するときも同様である。そし
て、係止爪１８が第１の案内溝２５の第３凸部２９を乗
り越えると、第２の案内溝２６に移る。When the nose portion 2 is pushed into the screw tightening machine main body 1 during the above-mentioned screwing operation, the locking claw 18 together with the nose portion 2 is moved to the screw tightening machine main body 1 as shown in FIG. Is guided along the first guide groove 25, but is guided by the first convex portion 27 immediately before reaching the first locking portion 21, and after rotating against the spring, the first locking portion Since it is locked to 21, the locking is performed smoothly. The same applies when the locking claw 18 is locked to the second locking portion 22. Then, when the locking claw 18 gets over the third convex portion 29 of the first guide groove 25, it moves to the second guide groove 26.
【００２７】ネジ締め作業が終了してノーズ部２をネジ
から離した後、ノーズ部２がバネ１４によりネジ締め機
本体１から復帰移動するときは、係止爪１８は逆方向に
移動する。そして、第１の案内溝２５との分岐に至る
と、係止爪１８はバネ１９により第１の案内溝２５側に
移動しようとするが、段差を越えることはできないか
ら、バネ１９に抗して第２の案内溝２６に沿って移動す
る。そして、ノーズ部２が初期位置に復帰するとき第２
の案内溝２６の第４凸部３０を乗り越えて第１の案内溝
２５に移って初期位置に戻り、次のねじ込みが準備され
る。After the screwing operation is completed and the nose portion 2 is separated from the screw, when the nose portion 2 is returned from the screw tightening machine main body 1 by the spring 14, the locking claw 18 moves in the opposite direction. Then, when reaching the branch with the first guide groove 25, the locking claw 18 tries to move toward the first guide groove 25 by the spring 19, but cannot move over the step. To move along the second guide groove 26. When the nose part 2 returns to the initial position, the second
Then, it goes over the fourth convex portion 30 of the guide groove 26, moves to the first guide groove 25, returns to the initial position, and prepares for the next screwing.
【００２８】したがって、ネジ締め後、ノーズ部２がネ
ジ締め機本体１から復帰移動したときに係止爪１８は第
２の案内溝２６に沿って移動するように案内されるか
ら、係止爪１８がノーズ部２の復帰移動時に第１又は第
２の係止部２２に係止することは回避される。Therefore, after the screw is tightened, the locking claw 18 is guided to move along the second guide groove 26 when the nose portion 2 returns from the screw tightening machine main body 1. Locking of the nose portion 18 to the first or second locking portion 22 during the return movement of the nose portion 2 is avoided.
【００２９】なお、係止手段として、係止爪をネジ締め
機本体１に、係止部をノーズ部に設けてもよい。このと
き案内手段はノーズ部に設ける。また、係止爪の案内手
段も係止爪の移動を案内する構造のものであればよく、
溝状に形成されることに限定されない。突条として形成
してもよい。As the locking means, a locking claw may be provided on the screw tightening machine main body 1 and a locking portion may be provided on the nose portion. At this time, the guide means is provided in the nose portion. In addition, the guide means of the locking claw may be of a structure that guides the movement of the locking claw,
It is not limited to being formed in a groove shape. It may be formed as a ridge.
【図１】(a) (b) は本発明に係るネジ締め機における２
本送り防止機構の要部の平面図及び側面図FIGS. 1 (a) and 1 (b) show two views of a screw tightening machine according to the present invention.
Top view and side view of main parts of the main feed prevention mechanism
【図２】図１(b) の案内手段部分の要部の拡大図FIG. 2 is an enlarged view of a main part of a guide means of FIG. 1 (b).
【図３】案内手段の斜視図FIG. 3 is a perspective view of a guide unit.
【図４】上記２本送り防止機構の作動状態の要部を示す
平面図FIG. 4 is a plan view showing a main part of an operation state of the double feed prevention mechanism.
【図５】上記２本送り防止機構の作動状態の要部を示す
平面図FIG. 5 is a plan view showing a main part of the operating state of the double feed prevention mechanism.
【図６】上記２本送り防止機構の作動状態の要部を示す
平面図FIG. 6 is a plan view showing a main part of the operation state of the double feed prevention mechanism.
【図７】(a) (b) は上記ネジ締め機のネジ送り機構の説
明図FIGS. 7A and 7B are explanatory views of a screw feed mechanism of the screw tightening machine.
１ ネジ締め機本体 ２ ノーズ部 ３ ドライバビット ５ 連結ネジ １８ 係止爪 ２１ 第１の係止部 ２２ 第２の係止部 ２５ 第１の案内溝 ２６ 第２の案内溝 DESCRIPTION OF SYMBOLS 1 Screw-tightening machine main body 2 Nose part 3 Driver bit 5 Connecting screw 18 Locking claw 21 First locking part 22 Second locking part 25 First guide groove 26 Second guide groove
Claims (3)
の前部に、上記ドライバビットの軸方向に移動可能で常
時ネジ締め機本体から前方に移動するようにバネ付勢さ
れたノーズ部を設け、ノーズ部に送りホイールを回転自
在に支持させ、上記ノーズ部のネジ締め機本体に対する
押し込み移動に連動して送りホイールを回転させること
によりノーズ部に供給された連結ネジをドライバビット
の延長方向に送り出すネジ締め機において、 上記ネジ締め機本体とノーズ部には、ノーズ部をネジ締
め機本体に対して途中まで押し込み移動させた後に押し
込み力を解除したときに互いに係止する係止手段と、ノ
ーズ部が所定の移動量だけ押し込まれた後に上記バネに
よりネジ締め機本体から復帰移動したときに上記両係止
手段の係止を回避するように案内する案内手段とを形成
したことを特徴とする連結ネジ用ネジ締め機における２
本送り防止機構。1. A nose portion which is movable in the axial direction of the driver bit and is spring-biased so as to always move forward from the main body of the screwdriver. The feed screw is rotatably supported by the nose part, and the connecting screw supplied to the nose part is extended in the direction of the driver bit by rotating the feed wheel in conjunction with the pushing movement of the nose part against the screw tightening machine body. In the screwing machine to be fed out, the screwing machine body and the nose portion have locking means for locking each other when the pressing force is released after the nose portion is pushed halfway with respect to the screwing machine body and moved. After the nose portion is pushed in by a predetermined movement amount, when the spring is returned from the screw tightening machine main body by the spring, the locking of the both locking means is avoided. 2 in the screw tightening machine for the connecting screw, characterized in that to form a guide means for internal
Main feed prevention mechanism.
部をネジ締め機本体に対して１本分のネジ送りがなされ
る送り量だけ押し込み移動させた位置とした請求項１に
記載の連結ネジ用ネジ締め機における２本送り防止機
構。2. The locking position of the locking means according to claim 1, wherein the locking position of the locking means is such that the nose portion is pushed and moved by a feed amount by which one screw is fed to the screw tightening machine main body. A double feed prevention mechanism in the screw tightening machine for connecting screws.
部をネジ締め機本体に対して所定のねじ込み深さに及ば
ない移動量だけ押し込み移動させた位置とした請求項１
に記載の連結ネジ用ネジ締め機における２本送り防止機
構。3. The locking position of the locking means is a position where the nose portion is pushed and moved relative to a screw tightening machine body by a movement amount not exceeding a predetermined screwing depth.
2. A double feed prevention mechanism in the screw tightening machine for connecting screws according to claim 1.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22867294A JP2856079B2 (en) | 1994-08-30 | 1994-08-30 | Double feed prevention mechanism in screw tightening machine for connecting screw |
| DE19526543A DE19526543C2 (en) | 1994-07-22 | 1995-07-20 | Screw tightening device |
| GB9802494A GB2320905B (en) | 1994-07-22 | 1995-07-21 | Screw tightener |
| GB9515078A GB2291612B (en) | 1994-07-22 | 1995-07-21 | Screw tightener |
| US08/752,434 US5899126A (en) | 1994-07-22 | 1996-11-14 | Screw tightener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22867294A JP2856079B2 (en) | 1994-08-30 | 1994-08-30 | Double feed prevention mechanism in screw tightening machine for connecting screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0871937A JPH0871937A (en) | 1996-03-19 |
| JP2856079B2 true JP2856079B2 (en) | 1999-02-10 |
Family
ID=16880011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22867294A Expired - Lifetime JP2856079B2 (en) | 1994-07-22 | 1994-08-30 | Double feed prevention mechanism in screw tightening machine for connecting screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2856079B2 (en) |
-
1994
- 1994-08-30 JP JP22867294A patent/JP2856079B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0871937A (en) | 1996-03-19 |
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