JPH07266250A - Device for preventing feed error of connecting screw for use in thread fastener - Google Patents
Device for preventing feed error of connecting screw for use in thread fastenerInfo
- Publication number
- JPH07266250A JPH07266250A JP7801694A JP7801694A JPH07266250A JP H07266250 A JPH07266250 A JP H07266250A JP 7801694 A JP7801694 A JP 7801694A JP 7801694 A JP7801694 A JP 7801694A JP H07266250 A JPH07266250 A JP H07266250A
- Authority
- JP
- Japan
- Prior art keywords
- bit
- driver bit
- screw
- stopper
- driver
- 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.)
- Granted
Links
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、連結ネジを使用するネ
ジ締め機において連結ネジが2度続けて送られる送りミ
スの発生を防止する防止装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preventive device for preventing the occurrence of a feeding error in which a connecting screw is fed twice in a screw tightener using the connecting screw.
【0002】[0002]
【従来技術】一般に、ネジ締め機はネジ締め機本体に対
して相対的に移動するノーズ部を設けてなり、ネジ締め
作業にあたってはノーズ部の先端を被ねじ込み材に押し
当てることによる相対移動に基づいてノーズ部に設けら
れたネジ送り機構が作動し、ノーズ部に供給された連結
ネジのネジを1本ずつ打ち出し部に送っている。このよ
うなネジ送り機構は例えば実開平2−126776号に
より知られている。2. Description of the Related Art Generally, a screw tightening machine is provided with a nose part that moves relative to the main body of the screw tightening machine, and when performing the screw tightening work, the tip of the nose part is pressed against a material to be screwed to allow relative movement. Based on this, the screw feeding mechanism provided in the nose portion operates to feed the connecting screws supplied to the nose portion one by one to the hammering portion. Such a screw feed mechanism is known, for example, from Japanese Utility Model Laid-Open No. 2-127676.
【0003】しかし、例えばノーズ部を誤って目的とす
る部材以外の物体に押し当ててしまうと、いわゆるチョ
ンサインが入ってネジ送り機構が作動してネジが一本送
られてしまうから、さらに目的とする被ねじ込み材にノ
ーズ部を押し当てると再びネジ送り機構が作動し、ノー
ズ部の打ち出し部にはさらに2本目のネジが供給され
る。このように、打ち出し部に2本のネジが送り込まれ
ると、これらのネジがノーズ部内で詰まるので、余分の
1本を除去しなければならず、その作業が面倒であるほ
か、除去される1本が無駄になってしまうという問題点
があった。However, if, for example, the nose part is accidentally pressed against an object other than the intended member, a so-called chord sign is entered and the screw feed mechanism operates to feed a single screw. When the nose portion is pressed against the material to be screwed, the screw feed mechanism is activated again, and the second screw is further supplied to the punched-out portion of the nose portion. In this way, when two screws are fed to the embossing section, these screws are clogged in the nose section, so an extra one has to be removed, which is a troublesome work and is also removed. There was a problem that books were wasted.
【0004】[0004]
【発明の目的】本発明は前記問題点を解消し、誤ってノ
ーズ部を押し付けた場合にネジ送りが行なわれるのを有
効に防止するネジ締め機における連結ネジの送りミス防
止装置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 provide a connecting screw feeding error preventing device in a screw tightening machine which effectively prevents screw feeding when the nose portion is erroneously pressed. Is its purpose.
【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の送りミス防止装置は、ネジ
締め機本体の内部にドライバビットとドライバビットの
回転駆動機構とを設け、ネジ締め機本体に対して上記ド
ライバビットの軸方向に相対的に摺動するノーズ部を設
け、該ノーズ部の先端には連結ネジの送り機構を設けた
ネジ締め機において、上記ノーズ部に上記ドライバビッ
トに対して直交方向に回動可能なビットストッパを設
け、かつ該ビットストッパをドライバビットの中心に向
かってバネ付勢するとともに、ビットストッパに対応す
るドライバビットの周面には上記ドライバビットの回転
時に上記ビットストッパに係脱する係止部を形成したこ
とを特徴とする。In order to achieve the above-mentioned object, a device for preventing misfeed of a connecting screw according to the present invention is provided with a driver bit and a rotation driving mechanism for the driver bit inside a screw tightener main body. A screw tightening machine is provided with a nose portion that slides relative to the main body of the tightening machine in the axial direction of the driver bit, and a feed mechanism for a connecting screw is provided at the tip of the nose portion. A bit stopper that is rotatable in the direction orthogonal to the bit is provided, and the bit stopper is spring-biased toward the center of the driver bit. It is characterized in that a locking portion which is engaged with and disengaged from the bit stopper during rotation is formed.
【0006】[0006]
【発明の作用、効果】本発明によれば、回転駆動機構を
作動させる操作を行なわずにノーズ部を釘打機本体側に
押し込むと、相対的にドライバビットがノーズ部側に移
動するが、ビットストッパがドライバビットの係止部に
係止することになり、ドライバビットの移動が阻止され
る。このため、ノーズ部の押し込みによる相対移動も阻
止されるから、連結ネジの送り機構も作動しない。した
がって、連結ネジの送りミスが確実に防止される。According to the present invention, when the nose portion is pushed into the nailing machine main body side without operating the rotary drive mechanism, the driver bit relatively moves to the nose portion side. The bit stopper is locked to the locking portion of the driver bit, and the movement of the driver bit is blocked. For this reason, the relative movement of the nose portion by pushing is prevented, and the feed mechanism for the connecting screw does not operate. Therefore, a mistake in feeding the connecting screw can be reliably prevented.
【0007】これに対し、ノーズ部を被ねじ込み材に押
し付けて釘打機本体押し込みながらトリガレバーを引き
操作すると、ドライバビットは回転駆動機構により回転
するから、一回転する間にビットストッパが係止部から
外れる状態になることがあり、このときノーズ部の相対
移動が可能となるから、連結ネジは送り機構により送ら
れ、さらにネジ頭の溝にドライバビットの先端が係合し
た状態でノーズ部の先端から打ち出される。On the other hand, when the nose portion is pressed against the material to be screwed and the trigger lever is pulled while the main body of the nail driver is pushed in, the driver bit is rotated by the rotary drive mechanism, so that the bit stopper is locked during one rotation. The nose part may be moved relative to the nose part, and the connecting screw is fed by the feed mechanism, and the nose part is engaged with the tip of the driver bit in the groove of the screw head. Is struck from the tip of.
【0008】したがって、上述の送りミス防止装置によ
れば、誤ってノーズ部を被ねじ込み材に対して押し付け
た場合にネジ送りが行なわれるのを確実に防止すること
ができる。Therefore, according to the above-described feeding error prevention device, it is possible to reliably prevent the screw feeding when the nose portion is accidentally pressed against the material to be screwed.
【0009】[0009]
【実施例】図1は本発明に係る連結ネジの送りミス防止
装置の要部の断面図、図2は図1のXーX線上の断面
図、図3は上記釘打機によるネジ締め作動態様説明図、
図4は図3のYーY線上の断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of a main part of a connecting screw feeding error prevention device according to the present invention, FIG. 2 is a cross-sectional view taken along the line X--X of FIG. 1, and FIG. Aspect explanatory diagram,
FIG. 4 is a sectional view taken along the line YY of FIG.
【0010】上記図1及び図2において符号1はネジ締
め機のネジ締め機本体で、内部にはドライバビット2と
回転駆動機構が設けられている。回転駆動機構はトリガ
レバー(図示せず)を指で引き操作することによりエア
モータ等によりドライバビット2を回転駆動させるもの
で、周知の機構である。ネジ締め機本体1の前端にはノ
ーズ部3がドライバビット2の軸方向に相対的に摺動可
能に配置され、ノーズ部3の先端には連結ネジaの送り
機構が設けられている。In FIG. 1 and FIG. 2, reference numeral 1 is a screw tightener main body of the screw tightener, in which a driver bit 2 and a rotary drive mechanism are provided. The rotary drive mechanism is a well-known mechanism that drives the driver bit 2 to rotate by an air motor or the like by pulling a trigger lever (not shown) with a finger. A nose portion 3 is arranged at the front end of the screw tightener main body 1 so as to be relatively slidable in the axial direction of the driver bit 2, and a feed mechanism for a connecting screw a is provided at the tip of the nose portion 3.
【0011】なお、連結ネジaの送り機構は図示しない
が、前述の実開平2−126776号に示されるものと
同じ周知の機構で、ネジ締め機本体1に対するノーズ部
3の相対移動に基づいて送りホイールを間欠的に駆動さ
せることにより打ち出し部に向けて連結ネジを一本分だ
け送り込むものである。Although the feeding mechanism of the connecting screw a is not shown, it is the same known mechanism as that shown in the above-mentioned Japanese Utility Model Laid-Open No. 2-126776, and is based on the relative movement of the nose portion 3 with respect to the screw tightener main body 1. By intermittently driving the feed wheel, only one connecting screw is fed toward the launch portion.
【0012】上記ノーズ部3には上記ドライバビット2
を摺動自在に収容案内する案内筒4が形成され、該案内
筒4の後端部にはフランジ状に張り出した一対の壁部
5、6が対向形成されている。これらの壁部5、6の壁
面はドライバビット2に対して直角に形成されていると
ともに、板状の連結部7を介して連結されている。この
連結部7によりドライバビット2の周面は対向壁面間の
空間部Sに露出している。The nose portion 3 has the driver bit 2
A guide tube 4 for slidably accommodating and guiding is formed, and a pair of wall portions 5 and 6 projecting in a flange shape are formed opposite to each other at a rear end portion of the guide tube 4. The wall surfaces of these wall portions 5 and 6 are formed at right angles to the driver bit 2 and are connected via a plate-shaped connecting portion 7. By this connecting portion 7, the peripheral surface of the driver bit 2 is exposed in the space S between the opposing wall surfaces.
【0013】次に、上記対向壁面間の空間部Sには上記
連結部7を挟んで反対側にそれぞれ1個のビットストッ
パ8、9が配置され、それぞれ対向壁面間の支軸10に
回動可能に軸支されている。ビットストッパ8、9の一
端と連結部7との間には圧縮バネ11が配置され、これ
によりビットストッパ8、9の他端は常時案内筒4内の
ドライバビット2の中心方向に回動するように付勢され
ている。Next, in the space S between the facing wall surfaces, one bit stopper 8 and 9 is arranged on the opposite side with the connecting portion 7 interposed therebetween, and the bit stoppers 8 and 9 are pivoted on the support shaft 10 between the facing wall surfaces. It is pivotally supported. A compression spring 11 is arranged between one end of the bit stoppers 8 and 9 and the connecting portion 7, so that the other ends of the bit stoppers 8 and 9 always rotate in the center direction of the driver bit 2 in the guide cylinder 4. Is urged to.
【0014】ところで、ドライバビット2の軸部の断面
は円形に形成されているが、ビットストッパ8、9に対
応する周面には係止部12が形成されている。この係止
部12は、上記軸部を外周面の一部を残した状態で断面
略三角形状に切欠き形成するとともに、後端面を軸部の
外周面と直角な係止壁13として形成したものである。By the way, the cross section of the shaft portion of the driver bit 2 is circular, but the engaging portion 12 is formed on the peripheral surface corresponding to the bit stoppers 8 and 9. The locking portion 12 is formed by notching the shaft portion in a substantially triangular cross-section with a part of the outer peripheral surface left, and forming the rear end surface as a locking wall 13 perpendicular to the outer peripheral surface of the shaft portion. It is a thing.
【0015】以上のように、ビットストッパ8、9は2
個形成されているのに対し、ドライバビット2の係止部
12の切欠き面12aは3面あって軸部を外周面の一部
が残されているから、両方のビットストッパ8、9が係
止部12に係合するか、いずれか一方のビットストッパ
9(又は8)が係止部12に係止する(図2の状態)
か、あるいは両方のビットストッパ8、9が係合状態か
ら解除する(図4の状態)かのいずれかの状態となる。
両方のビットストッパ8、9ともに係合解除の状態とな
ることもあるが、その確率は非常に低いので、通常は図
1のように少なくとも一方のビットストッパ8又は9が
係止部12に係合している状態になっている。As described above, the bit stoppers 8 and 9 are 2
On the other hand, since the cutout surface 12a of the locking portion 12 of the driver bit 2 has three surfaces and a part of the outer peripheral surface of the shaft portion is left, both bit stoppers 8 and 9 are formed. One of the bit stoppers 9 (or 8) is engaged with the engaging portion 12 or is engaged with the engaging portion 12 (state of FIG. 2).
Either, or both bit stoppers 8 and 9 are released from the engaged state (state of FIG. 4).
Both bit stoppers 8 and 9 may be in the disengaged state, but the probability is very low, so normally at least one bit stopper 8 or 9 is engaged with the locking portion 12 as shown in FIG. It is in a matched state.
【0016】次に、前記構成の連結ネジの送りミス防止
装置の作動態様について説明すると、トリガレバーを引
き操作しない状態でノーズ部3をネジ締め機本体1側に
押し込むと、相対的にドライバビット2が前方に移動す
るが、少なくとも一方のビットストッパ8、9が係止部
12に係合しているから、ビットストッパ8、9がドラ
イバビット2の係止部12の係止壁13に係止すること
になり、ドライバビット2の前方移動が阻止される。こ
のため、ノーズ部3の押し込みによる相対移動も阻止さ
れるから、連結ネジの送り機構も作動しない。したがっ
て、連結ネジの送りミスが確実に防止される。Next, the operation mode of the connecting screw feeding error preventing device having the above-mentioned structure will be described. When the nose portion 3 is pushed into the screw tightener main body 1 side without pulling the trigger lever, the driver bit is relatively moved. 2 moves forward, but at least one of the bit stoppers 8 and 9 is engaged with the engaging portion 12, so that the bit stoppers 8 and 9 are engaged with the engaging wall 13 of the engaging portion 12 of the driver bit 2. Therefore, the driver bit 2 is prevented from moving forward. For this reason, the relative movement of the nose portion 3 due to being pushed in is also prevented, so that the connecting screw feeding mechanism does not operate. Therefore, a mistake in feeding the connecting screw can be reliably prevented.
【0017】これに対し、図3に示されるように、ノー
ズ部3を被ねじ込み材(図示せず)に押し付けて釘打機
本体1に押し込みながらトリガレバーを引き操作する
と、ドライバビット2は回転駆動機構により回転するか
ら、一回転する間に図4のように両方のビットストッパ
8、9が係止部12から外れる状態になることがあり、
このときノーズ部3の相対移動が可能となるから、連結
ネジは送り機構により送られ、さらに所定位置に送られ
たネジ14のネジ頭の溝にドライバビット2の先端が係
合した状態でノーズ部3の先端から打ち出される。On the other hand, as shown in FIG. 3, when the nose portion 3 is pressed against the material to be screwed (not shown) and the trigger lever is pulled while being pushed into the main body 1 of the nail driver, the driver bit 2 rotates. Since it is rotated by the drive mechanism, both bit stoppers 8 and 9 may be disengaged from the locking portion 12 as shown in FIG. 4 during one rotation.
At this time, since the relative movement of the nose portion 3 becomes possible, the connecting screw is fed by the feeding mechanism, and the nose is engaged with the tip of the driver bit 2 being engaged with the groove of the screw head of the screw 14 fed to the predetermined position. It is punched out from the tip of the part 3.
【0018】したがって、上述の送りミス防止装置によ
れば、誤ってノーズ部3を押し付けた場合にネジ送りが
行なわれるのを確実に防止することができる。Therefore, according to the above-described feeding error prevention device, it is possible to reliably prevent screw feeding when the nose portion 3 is erroneously pressed.
【0019】なお、ビットストッパ8、9とドライバビ
ット2の係止部12の形状は前記の例に開示されたもの
に限定されない。例えば、ドライバビット2の係止部1
2の切欠き面12aを、図5(a) のように2面に形成し
てもよく、同図(b) のように4面に形成してもよく、同
図(c) のように6面に形成してもよいほか、同図(d)の
ように楕円状に形成してもよい。そのほか、ビットスト
ッパの数を1個あるいは3個以上配置する構成としても
よい。さらに、ビットストッパは上述の例のように案内
筒に形成された壁部に設ける必要はない。要するに、ド
ライバビットと直交方向に回動可能に設けられていれば
よい。The shapes of the bit stoppers 8 and 9 and the engaging portion 12 of the driver bit 2 are not limited to those disclosed in the above example. For example, the locking portion 1 of the driver bit 2
The two notched surfaces 12a may be formed on two surfaces as shown in FIG. 5 (a), may be formed on four surfaces as shown in FIG. 5 (b), or may be formed as shown in FIG. 5 (c). It may be formed on six sides, or may be formed in an elliptical shape as shown in FIG. In addition, the number of bit stoppers may be one or three or more. Furthermore, the bit stopper does not have to be provided on the wall portion formed on the guide tube as in the above-mentioned example. In short, it suffices that it be provided so as to be rotatable in the direction orthogonal to the driver bit.
【0020】また、ビットストッパも上述の例限定され
ない。図6(a) のように、ビットストッパ8a、9aを
ロッド状に形成して案内筒4の連結部7とノーズ部3と
に連続して形成された凹部14に収納し、上記ビットス
トッパ8a、9aをドライバビット2をはさんで軸方向
に対向させるとともに、圧縮バネ15により各ビットス
トッパ8a、9aの先端をドライバビット2の中心に向
けて付勢するように構成してもよい。この場合も、ドラ
イバビット2が一回転するうちに同図(b) のようにビッ
トストッパ8a、9aとドライバビット2の切欠き面1
2aとの係合が解除するから、前述の例と同様の作用効
果が奏される。The bit stopper is not limited to the above example. As shown in FIG. 6 (a), the bit stoppers 8a and 9a are formed in a rod shape and are housed in a recess 14 formed continuously with the connecting portion 7 and the nose portion 3 of the guide cylinder 4, and the bit stopper 8a is provided. , 9a may be axially opposed to each other with the driver bit 2 interposed therebetween, and the compression spring 15 may urge the tips of the bit stoppers 8a, 9a toward the center of the driver bit 2. Also in this case, while the driver bit 2 makes one rotation, as shown in FIG. 2B, the bit stoppers 8a and 9a and the cutout surface 1 of the driver bit 2 are formed.
Since the engagement with 2a is released, the same operation and effect as those of the above-described example can be obtained.
【図1】図1は本発明に係る連結ネジの送りミス防止装
置の要部の断面図FIG. 1 is a cross-sectional view of a main part of a connecting screw feeding error prevention device according to the present invention.
【図2】図1のXーX線上の拡大断面図FIG. 2 is an enlarged sectional view taken along line XX of FIG.
【図3】上記釘打機によるネジ締め作動態様説明図FIG. 3 is an explanatory view of a screw tightening operation mode by the nail driver.
【図4】図3のYーY線上の拡大断面図FIG. 4 is an enlarged sectional view taken along the line YY of FIG.
【図5】(a) (b) (c) (d) はそれぞれドライバビットの
係止部の断面形状の他の例の断面図5 (a), (b), (c), and (d) are cross-sectional views of another example of the cross-sectional shape of the locking portion of the driver bit.
【図6】(a) (b) は連結ネジの送りミス防止装置の他の
例を図2、図5と同じ断面で示した断面図6 (a) and 6 (b) are cross-sectional views showing another example of the feed error preventing device for the connecting screw in the same cross section as FIG. 2 and FIG.
1 ネジ締め機本体 2 ドライバビット 3 ノーズ部 8 ビットストッパ 9 ビットストッパ 12 係止部 13 係止壁 1 Screw tightener main body 2 Driver bit 3 Nose part 8 Bit stopper 9 Bit stopper 12 Locking part 13 Locking wall
Claims (1)
とドライバビットの回転駆動機構とを設け、ネジ締め機
本体に対して上記ドライバビットの軸方向に相対的に摺
動するノーズ部を設け、該ノーズ部の先端には連結ネジ
の送り機構を設けたネジ締め機において、 上記ノーズ部に上記ドライバビットに対して直交方向に
回動可能なビットストッパを設け、かつ該ビットストッ
パをドライバビットの中心に向かってバネ付勢するとと
もに、ビットストッパに対応するドライバビットの周面
には上記ドライバビットの回転時に上記ビットストッパ
に係脱する係止部を形成したことを特徴とするネジ締め
機における連結ネジの送りミス防止装置。1. A screwdriver main body is provided with a driver bit and a rotation driving mechanism for the driver bit, and a nose portion that slides relative to the screw fastener main body in the axial direction of the driver bit is provided. In a screw tightener provided with a connecting screw feed mechanism at the tip of the nose portion, a bit stopper rotatable in the direction orthogonal to the driver bit is provided at the nose portion, and the bit stopper is provided for the driver bit. In a screw tightener characterized in that a spring portion is biased toward the center, and a locking portion that engages and disengages with the bit stopper when the driver bit rotates is formed on the peripheral surface of the driver bit corresponding to the bit stopper. Device for preventing misfeeds of connecting screws.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7801694A JP2900354B2 (en) | 1994-03-24 | 1994-03-24 | Device for preventing feed error of connecting screw in screw tightening machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7801694A JP2900354B2 (en) | 1994-03-24 | 1994-03-24 | Device for preventing feed error of connecting screw in screw tightening machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07266250A true JPH07266250A (en) | 1995-10-17 |
JP2900354B2 JP2900354B2 (en) | 1999-06-02 |
Family
ID=13650007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7801694A Expired - Fee Related JP2900354B2 (en) | 1994-03-24 | 1994-03-24 | Device for preventing feed error of connecting screw in screw tightening machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2900354B2 (en) |
-
1994
- 1994-03-24 JP JP7801694A patent/JP2900354B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2900354B2 (en) | 1999-06-02 |
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