JP2000079569A - Driving force adjusting mechanism for pneumatic type screw driving machine - Google Patents
Driving force adjusting mechanism for pneumatic type screw driving machineInfo
- Publication number
- JP2000079569A JP2000079569A JP10250848A JP25084898A JP2000079569A JP 2000079569 A JP2000079569 A JP 2000079569A JP 10250848 A JP10250848 A JP 10250848A JP 25084898 A JP25084898 A JP 25084898A JP 2000079569 A JP2000079569 A JP 2000079569A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- driving
- air supply
- driver bit
- air
- 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
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は空気圧式ネジ打込み
機において打撃用ドライバビットの打込み力を調整する
調整機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting mechanism for adjusting the driving force of a driver bit for driving in a pneumatic screw driving machine.
【0002】[0002]
【従来技術】一般に、空気圧式ネジ打込み機は被打込み
材に対して打込みネジを軽く打込んだ後にしっかりと締
め込むものであり、このような打込みとネジ締め込みの
工程に応じ、それぞれ打込みネジを打撃する打撃機構
と、打込みネジを回転させるネジ締め込み機構とが設け
られている。打撃機構は、打撃シリンダ内に摺動自在に
収容された打撃ピストンにドライバビットを一体に結合
し、トリガの操作によってメインバルブを作動させ、圧
縮エアを貯留するエアチャンバを上記打撃シリンダに対
して開閉し、圧縮エアを打撃シリンダに対して供給して
打撃ピストンを駆動するものであるが、従来は圧縮エア
の供給量は常に一定であり、したがって打撃ピストンに
よる打込み力も常に一定であった。そして、打込み時に
は、打込みネジの先端が上材を貫通して下地の途中まで
打込まれる必要がある。2. Description of the Related Art In general, a pneumatic screw driving machine is a device in which a driving screw is lightly driven into a material to be driven and then firmly tightened. And a screw tightening mechanism for rotating the driving screw. The striking mechanism integrally connects a driver bit to a striking piston housed slidably in the striking cylinder, operates a main valve by operating a trigger, and moves an air chamber that stores compressed air to the striking cylinder. It opens and closes and supplies compressed air to the striking cylinder to drive the striking piston. Conventionally, however, the supply amount of compressed air is always constant, and therefore, the driving force of the striking piston is always constant. At the time of driving, it is necessary that the tip of the driving screw penetrates the upper material and is driven halfway into the base.
【0003】[0003]
【発明が解決しようとする課題】ところが、例えば被打
込み材を構成する上材が石膏ボードであっても、その下
地が木板である場合と、鋼板である場合とがある。木板
は鋼板に比べて軟質であるから打込みネジを上材を貫通
させ、木板の途中まで打込むためのエネルギーは鋼板に
比べて小さくてもよい。しかし、この打込みエネルギー
で打込みネジの先端を鋼板に突き刺すのは不十分であ
る。逆に、打込みエネルギーの大きさを鋼板に合わせる
と、この打込みエネルギーで木板下地に打込みネジを打
込んだ場合、打込みネジが木板を貫通してしまったり、
ネジ打込み機の反力によるズレなどが大きくなって、ド
ライバビットの先端が打込みネジの頭部溝に係合できず
にネジ締め不良が発生したりする不都合がある。However, even if the upper material constituting the material to be driven is gypsum board, for example, the base material may be a wooden board or a steel sheet. Since the wooden board is softer than the steel sheet, the energy for driving the driving screw through the upper material and driving halfway into the wooden board may be smaller than that of the steel sheet. However, it is insufficient to pierce the tip of the driving screw into the steel plate with this driving energy. Conversely, if the magnitude of the driving energy is matched to the steel sheet, if the driving screw drives the driving screw into the base of the wooden board, the driving screw will penetrate the wooden board,
The displacement due to the reaction force of the screw driving machine becomes large, and the tip of the driver bit cannot be engaged with the head groove of the driving screw.
【0004】本発明は上記欠点を解消し、打込み力を調
整して被打込み材に対する打込みネジの打込み深さを常
に適正にすることができる空気圧式ネジ打込み機の打込
み力調整機構を提供することをその課題とする。An object of the present invention is to provide a driving force adjusting mechanism for a pneumatic screw driving machine which can solve the above-mentioned drawbacks and can always adjust the driving force so that the driving depth of the driving screw to the material to be driven is always appropriate. Is the subject.
【0005】[0005]
【課題を解決するための手段】前記課題を解決するた
め、本発明に係る空気圧式ネジ打込み機の打込み力調整
機構は、圧縮エアを貯留するエアチャンバから打撃シリ
ンダ内に圧縮エアを供給してその内部の打撃ピストンに
一体に結合したドライバビットを打込み作動させる打撃
機構と、上記ドライバビットをねじ締め込みさせるねじ
締め込み機構とを備え、上記打撃機構によりドライバビ
ットが打込みネジを打撃して被打込み材に対して打込み
ネジの頭部が浮く程度に打込んだ後にねじ締め込み機構
により上記打込みネジを締め込む空気圧式ネジ打込み機
において、上記エアチャンバから打撃シリンダに圧縮エ
アを供給するエア供給口を少なくとも2段に形成すると
ともに、上記エア供給口を選択的に開閉する切り替えバ
ルブを外部から操作可能に設けたことを特徴とする。In order to solve the above-mentioned problems, a driving force adjusting mechanism of a pneumatic screw driving machine according to the present invention supplies compressed air from an air chamber for storing compressed air into a striking cylinder. It has a striking mechanism for driving a driver bit integrally coupled to a striking piston inside thereof, and a screw tightening mechanism for screwing the driver bit, and the driver bit hits the driving screw by the striking mechanism and receives an impact. An air supply for supplying compressed air from the air chamber to a striking cylinder in a pneumatic screw driving machine in which the head of the driving screw is driven to the extent that the head of the driving screw floats with respect to the driving material, and the driving screw is tightened by the screw tightening mechanism Externally operate a switching valve that forms at least two steps and selectively opens and closes the air supply port. Characterized by providing the capability.
【0006】なお、前記切り替えバルブは、外部に操作
可能に設けた操作ダイヤルと、操作ダイヤルに連結され
たバルブ本体とから構成され、操作ダイヤルによってバ
ルブ本体が前記一方のエア供給口を選択的に開閉するよ
うにするのが好ましい。The switching valve includes an operation dial provided to be operable outside and a valve body connected to the operation dial, and the valve body selectively selects the one air supply port by the operation dial. It is preferable to open and close.
【0007】[0007]
【発明の実施の形態】図1はネジ打込み機の要部を示す
もので、このネジ打込み機は打撃機構とねじ締め込み機
構とを備えている。打撃機構は打撃シリンダ1と打撃シ
リンダ1内に摺動自在に設けられた打撃ピストン2と、
打撃ピストン2に一体に結合されたドライバビット3と
を有し、図示しないトリガを引き操作することにより、
メインバルブ4を開き作動させ、圧縮エアを貯留するエ
アチャンバ(エア供給源に接続している)から打撃シリ
ンダ1内に圧縮エアを供給してドライバビット3を打込
み作動させるものである。また、ねじ締め込み機構(図
示せず)は、エアモータ等の動力によってドライバビッ
ト3をねじ締め込みするもので、上記打撃機構の作動開
始とほぼ同時に作動し、ドライバビット3をその軸心の
まわりに回転させることにより、ドライバビット3によ
って打込まれた打込みネジを締め込むものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a main part of a screw driving machine. The screw driving machine has a striking mechanism and a screw tightening mechanism. The striking mechanism includes a striking cylinder 1, a striking piston 2 slidably provided in the striking cylinder 1,
A driver bit 3 integrally connected to the striking piston 2, and by operating a trigger (not shown),
The main valve 4 is opened to supply compressed air into the striking cylinder 1 from an air chamber (connected to an air supply source) for storing compressed air, and the driver bit 3 is driven. The screw tightening mechanism (not shown) tightens the screw of the driver bit 3 by the power of an air motor or the like, and operates almost simultaneously with the start of the operation of the above-mentioned striking mechanism, and moves the driver bit 3 around its axis. , The driving screw driven by the driver bit 3 is tightened.
【0008】上記打撃機構によりドライバビット3が打
込みネジを打撃して被打込み材に対して打込みネジの頭
部が浮く程度に打込んだ後にねじ閉め込み機構により上
記打込みネジを締め込むものである。このような打撃機
構とねじ締め込み機構とは、例えば特開平9ー2903
7号公報、特開平9ー141571号公報などによって
知られるように公知の機構である。[0008] After the driver bit 3 hits the driving screw by the hitting mechanism and hits the head of the driving screw so that the head of the driving screw floats on the material to be driven, the driving screw is tightened by the screw closing mechanism. Such a striking mechanism and a screw tightening mechanism are described in, for example, Japanese Patent Application Laid-Open No. 9-2903.
This is a well-known mechanism as disclosed in Japanese Patent Application Laid-Open No. 7-141, Japanese Patent Application Laid-Open No. 9-141571 and the like.
【0009】打撃シリンダ1のシリンダヘッド部の周囲
にはメインバルブ4が配置されている。メインバルブ4
は環状に形成され、上下方向に摺動することによりその
下端面がエアチャンバ5の内壁の上端に係合可能に設け
られ、常時はバルブ上室6に圧縮エアが供給され、この
エアとバネ7の圧力によりメインバルブ4を下降させて
その下端をエアチャンバ5の内壁の上端に係合させ、こ
れによりエアチャンバ5を打撃シリンダ1に対して閉じ
ている。これに対し、トリガを引き操作することにより
図示しないトリガバルブを作動させて上記バルブ上室6
内の圧縮エアを排出させることによって図2のようにメ
インバルブ4を上動させることによりその下端がエアチ
ャンバ5の内壁の上端から離反し、エアチャンバ5は打
撃シリンダ1に開口される。A main valve 4 is arranged around the cylinder head of the impact cylinder 1. Main valve 4
Is formed in an annular shape, and a lower end surface thereof is provided so as to be able to engage with an upper end of an inner wall of the air chamber 5 by sliding vertically, and compressed air is normally supplied to the valve upper chamber 6. The main valve 4 is lowered by the pressure of 7, and the lower end thereof is engaged with the upper end of the inner wall of the air chamber 5, whereby the air chamber 5 is closed with respect to the striking cylinder 1. On the other hand, the trigger valve (not shown) is actuated by pulling the trigger to operate the valve upper chamber 6.
The main valve 4 is moved upward as shown in FIG. 2 by discharging the compressed air therein, so that the lower end is separated from the upper end of the inner wall of the air chamber 5, and the air chamber 5 is opened to the striking cylinder 1.
【0010】なお、エアチャンバ5と打撃シリンダ1と
の間には筒状空間部8が形成され、メインバルブ4の開
き作動によりエアチャンバ5が打撃シリンダ1に開口さ
れたときは、エアチャンバ5内の圧縮エアは筒状空間部
8を介して打撃シリンダ1に供給されるように構成され
ている。A cylindrical space 8 is formed between the air chamber 5 and the striking cylinder 1. When the main valve 4 is opened to open the air chamber 5 to the striking cylinder 1, the air chamber 5 is opened. The compressed air inside is configured to be supplied to the impact cylinder 1 via the cylindrical space 8.
【0011】打撃シリンダ1には打撃ピストン2が摺動
自在に収容されているとともに、その上端のシリンダヘ
ッド部1aの上部にはさらに小径の筒状部10が延長形
成され、打撃シリンダ1とその筒状部10とにはそれぞ
れ下段エア供給口11と上段エア供給口12とが開口形
成されている。上記エアチャンバ5内の圧縮エアは筒状
空間部8を介して下段エア供給口11と上段エア供給口
12から打撃シリンダ1に供給されるのである。また、
上下段のエア供給口12、11の間には排気用開口13
が形成され、外側からゴム等の弾性材14で覆われてい
る。A striking piston 2 is slidably housed in the striking cylinder 1, and a cylindrical portion 10 having a smaller diameter is formed on the upper end of a cylinder head 1a at the upper end thereof. A lower-stage air supply port 11 and an upper-stage air supply port 12 are formed in the tubular portion 10 respectively. The compressed air in the air chamber 5 is supplied to the striking cylinder 1 from the lower air supply port 11 and the upper air supply port 12 through the cylindrical space 8. Also,
An exhaust opening 13 is provided between the upper and lower air supply ports 12 and 11.
Is formed and covered with an elastic material 14 such as rubber from the outside.
【0012】上記打撃シリンダ1の筒状部10の内側に
は上段エア供給口12を開閉する切り替えバルブ15が
上下に摺動可能に配置されている。切り替えバルブ15
は、外部に回動操作可能に設けた操作ダイヤル15a
と、操作ダイヤル15aに引っ張りバネ16を介して連
結されたバルブ本体15bとから構成されている。そし
て、操作ダイヤル15aの下端とバルブ本体15bの上
端とはそれぞれ斜めに形成されている。また、バルブ本
体15bの下部には2段のシール手段9(Oリング)が
周設されている。A switching valve 15 for opening and closing the upper air supply port 12 is slidably arranged vertically inside the cylindrical portion 10 of the impact cylinder 1. Switching valve 15
Is an operation dial 15a provided to be rotatable outside.
And a valve body 15b connected to the operation dial 15a via a tension spring 16. The lower end of the operation dial 15a and the upper end of the valve body 15b are each formed obliquely. A two-stage sealing means 9 (O-ring) is provided around the lower part of the valve body 15b.
【0013】図1、図2のように、操作ダイヤル15a
を手で回動させてその下端とバルブ本体15bの傾斜上
端とが突き当てられるように操作したときは、バルブ本
体15bの上下段のシール手段9が上段エア供給口12
を閉じる。これに対し、操作ダイヤル15aを図3のよ
うにさらに180°回動操作して、その下端がバルブ本
体15bの傾斜下端とが突き当てられるように調整した
ときは、バルブ本体15bは引っ張りバネ16により上
方に引き寄せられて上段エア供給口12が開く。このよ
うに、操作ダイヤル15aの操作により上段エア供給口
12は開閉制御される。As shown in FIGS. 1 and 2, the operation dial 15a
Is rotated by hand so that the lower end thereof and the inclined upper end of the valve body 15b abut against each other, the upper and lower sealing means 9 of the valve body 15b
Close. On the other hand, when the operation dial 15a is further rotated by 180 ° as shown in FIG. 3 and its lower end is adjusted so as to abut against the inclined lower end of the valve body 15b, the valve body 15b is pulled by the tension spring 16a. And the upper air supply port 12 is opened. In this manner, opening and closing of the upper air supply port 12 is controlled by operating the operation dial 15a.
【0014】前記構成において、まず被打込み材の下地
が木板のような軟質材で、あまり大きな打込み力を必要
としないときは、操作ダイヤル15aによってバルブ本
体15bが図1の位置のようになって上段エア供給口1
2を閉じるように調整する。これにより、ネジ打込み機
を起動させるにあたりトリガを引いて図2のようにメイ
ンバルブ4を開き作動させると、エアチャンバ5内の圧
縮エアが筒状空間部8を経て打撃シリンダ1の上下段エ
ア供給口11を通るとき、上段エア供給口12は閉じて
いるから、下段エア供給口11のみから打撃シリンダ1
内に供給される。その圧縮エアの圧力により上述のよう
に打撃ピストン2が駆動され、ドライバビット3によっ
て打込みネジが打込まれる。このように、圧縮エアは下
段エア供給口11のみから供給されるから、その打込み
力は比較的小さい。したがって、打込みネジは下地の木
板に適度の打込み深さまで打込まれる。その後、ねじ締
め込み機構により打込みネジは木板に締め込まれる。In the above configuration, first, when the base material of the material to be driven is a soft material such as a wooden board and does not require an excessively large driving force, the valve body 15b is moved to the position shown in FIG. Upper air supply port 1
Adjust to close 2. Thereby, when the trigger is pulled and the main valve 4 is opened and actuated as shown in FIG. 2 to start the screw driving machine, the compressed air in the air chamber 5 passes through the cylindrical space 8 and the upper and lower air of the striking cylinder 1 When passing through the supply port 11, the upper air supply port 12 is closed.
Supplied within. The impact piston 2 is driven by the pressure of the compressed air as described above, and the driving screw is driven by the driver bit 3. As described above, since the compressed air is supplied only from the lower air supply port 11, the driving force is relatively small. Accordingly, the driving screw is driven into the underlying wooden board to an appropriate driving depth. Thereafter, the driving screw is tightened to the wooden board by the screw tightening mechanism.
【0015】これに対し、被打込み材の下地が鋼板のよ
うに大きな打込み力を必要とするときは、操作ダイヤル
15aによってバルブ本体15bが図3の位置のように
なって上段エア供給口12を開くように調整する。これ
により、トリガを引いてメインバルブ4を開き作動させ
ると、エアチャンバ5内の圧縮エアは上下段のエア供給
口から供給されるから、大きな打込み力が得られる。し
たがって、打込みネジを下地の鋼板に対して適度の打込
み深さまで打込むことができる。なお、筒状空間部8に
供給された圧縮エアの一部は点線矢印のようにエアモー
タに供給され、ドライバビット3をねじ締め込みさせ
る。On the other hand, when the base material of the material to be driven requires a large driving force such as a steel plate, the valve body 15b is moved to the position shown in FIG. Adjust to open. Thus, when the trigger is pulled to open the main valve 4, the compressed air in the air chamber 5 is supplied from the upper and lower air supply ports, so that a large driving force is obtained. Therefore, the driving screw can be driven into the base steel sheet to an appropriate driving depth. A part of the compressed air supplied to the cylindrical space 8 is supplied to the air motor as shown by a dotted arrow, and the driver bit 3 is screwed.
【0016】ところで、トリガによりメインバルブ4を
閉じ作動させると、エアチャンバ5は打撃シリンダ1に
対して閉鎖されると同時に排気通路(図1の符号22)
が開くので、打撃ピストン2は上動し、打撃シリンダ1
内に供給された圧縮エアは排気通路から外部に排出され
る。このとき、排気用開口13からも弾性材14が伸び
て外部に排気される。When the main valve 4 is closed and actuated by a trigger, the air chamber 5 is closed with respect to the striking cylinder 1 and at the same time the exhaust passage (reference numeral 22 in FIG. 1).
Is opened, the impact piston 2 moves upward, and the impact cylinder 1
The compressed air supplied to the inside is discharged from the exhaust passage to the outside. At this time, the elastic material 14 also extends from the exhaust opening 13 and is exhausted to the outside.
【0017】上述のように、切り替えバルブ15の切り
替え操作により上下段のエア供給口12、11を選択的
に開閉してドライバビット3による打込み力を被打込み
材の種類に対応させて調整することができるから、被打
込み材に対する打込みネジの打込み深さを常に適正にす
ることができる。As described above, the upper and lower air supply ports 12 and 11 are selectively opened and closed by the switching operation of the switching valve 15 to adjust the driving force of the driver bit 3 in accordance with the type of the material to be driven. Therefore, the driving depth of the driving screw with respect to the material to be driven can always be made appropriate.
【0018】なお、上述の例はエア供給口12、11を
上下2段に設けた例であるが、2段に限定されず3段以
上にしてもよい。この場合は、切り替えバルブ15も3
段に切り替えできるように構成すればよい。Although the above-described example is an example in which the air supply ports 12 and 11 are provided in two upper and lower stages, the number is not limited to two and may be three or more. In this case, the switching valve 15 is also 3
What is necessary is just to comprise so that switching to a stage is possible.
【0019】次に、図4は他の実施形態を示すもので、
打撃シリンダ1の上部の筒状部10には上下2段のエア
供給口12´、11´が形成され、内部には切り替えバ
ルブ15´が上下に摺動自在に配置されている。この切
り替えバルブ15´は操作ダイヤル15´aとバルブ本
体15´bとを圧縮バネ17を介して連結したもので、
バルブ本体15bは小径下部18と中径中間部19と大
径上部20とから構成され、上端は上述の例と同様に傾
斜している。小径下部18と大径上部20にはシール手
段が周設されている。バルブ本体15bが圧縮バネ17
のバネ力によって下端位置にあるときは、上下段エア供
給口12´、11´は閉じられているとともに、小径下
部18と中径中間部19との間の段差面21が上段エア
供給口12´から筒状空間部8に臨んでいる。Next, FIG. 4 shows another embodiment.
Upper and lower two-stage air supply ports 12 ′ and 11 ′ are formed in the upper cylindrical portion 10 of the striking cylinder 1, and a switching valve 15 ′ is slidably arranged vertically inside. The switching valve 15 ′ is obtained by connecting an operation dial 15 ′ a and a valve body 15 ′ b via a compression spring 17.
The valve body 15b includes a small-diameter lower part 18, a middle-diameter middle part 19, and a large-diameter upper part 20, and the upper end is inclined as in the above-described example. Sealing means is provided around the small-diameter lower portion 18 and the large-diameter upper portion 20. The valve body 15b is a compression spring 17
When the spring is at the lower end position, the upper and lower air supply ports 12 ′ and 11 ′ are closed, and the step surface 21 between the small-diameter lower portion 18 and the middle-diameter intermediate portion 19 is closed by the upper air supply port 12. 'And the cylindrical space 8.
【0020】上記構成において、操作ダイヤル15´a
とバルブ本体15´bとの連結状態を同図のようにした
状態でネジ打込み機を起動させると、メインバルブ4が
開き作動してエアチャンバ5内の圧縮エアが筒状空間部
8を通り、上段エア供給口12´からバルブ本体15b
の小径下部18と中径中間部19との間の段差面21に
作用し、バルブ本体15bを圧縮バネ17に抗して押し
あげる。これにより、図5のようにバルブ本体15´b
は操作ダイヤル15´aに係合する位置まで上動するの
で、下段エア供給口11´のみが開かれ、圧縮エアは下
段エア供給口11´から打撃シリンダ1に供給される。
この場合の打込み力は比較的小さい。In the above configuration, the operation dial 15'a
When the screw driving machine is started in a state where the connection state between the valve body 15'b and the valve body 15'b is as shown in the figure, the main valve 4 is opened and the compressed air in the air chamber 5 passes through the cylindrical space portion 8. From the upper air supply port 12 'to the valve body 15b.
Acts on the step surface 21 between the small-diameter lower portion 18 and the middle-diameter intermediate portion 19 to push up the valve body 15 b against the compression spring 17. Thereby, as shown in FIG.
Moves upward to a position where it engages with the operation dial 15'a, so that only the lower air supply port 11 'is opened, and compressed air is supplied to the impact cylinder 1 from the lower air supply port 11'.
The driving force in this case is relatively small.
【0021】これに対し、操作ダイヤル15aを図6の
ように180°回転させると、バルブ本体15´bが上
動して操作ダイヤル15´aに係合する位置では上下段
エア供給口12´、11´が開かれることになる。した
がって、圧縮エアは上下段エア供給口12´、11´か
ら打撃シリンダ1に供給されるので、打込み力は大き
い。On the other hand, when the operation dial 15a is rotated by 180.degree. As shown in FIG. 6, the valve main body 15'b moves upward and at the position where it engages with the operation dial 15'a, the upper and lower air supply ports 12 '. , 11 'will be opened. Therefore, the compressed air is supplied to the striking cylinder 1 from the upper and lower air supply ports 12 'and 11', so that the driving force is large.
【図1】空気圧式ネジ打込み機の要部の縦断面図FIG. 1 is a longitudinal sectional view of a main part of a pneumatic screw driving machine.
【図2】上記ネジ打込み機の作動態様説明図FIG. 2 is an explanatory view of an operation mode of the screw driving machine.
【図3】切り替えバルブを切り替え作動させたときの作
動態様説明図FIG. 3 is an explanatory view of an operation mode when a switching valve is switched.
【図4】空気圧式ネジ打込み機の他の例の要部の作動前
の縦断面図FIG. 4 is a longitudinal sectional view of a main part of another example of the pneumatic screw driving machine before operation.
【図5】上記空気圧式ネジ打込み機の作動時の縦断面図FIG. 5 is a longitudinal sectional view of the pneumatic screw driving machine during operation.
【図6】切り替えバルブを切り替え作動させたときの作
動態様説明図FIG. 6 is an explanatory view of an operation mode when a switching valve is switched.
1 打撃シリンダ 2 打撃ピストン 3 ドライバビット 5 エアチャンバ 11、 下段エア供給口 12 上段エア供給口 15 切り替えバルブ 15a 操作ダイヤル 15b バルブ本体 DESCRIPTION OF SYMBOLS 1 Impact cylinder 2 Impact piston 3 Driver bit 5 Air chamber 11, Lower air supply port 12 Upper air supply port 15 Switching valve 15a Operation dial 15b Valve body
Claims (2)
撃シリンダ内に圧縮エアを供給してその内部の打撃ピス
トンに一体に結合したドライバビットを打込み作動させ
る打撃機構と、上記ドライバビットを回転駆動させるね
じ締め込み機構とを備え、上記打撃機構によりドライバ
ビットが打込みネジを打撃して被打込み材に対して打込
みネジの頭部が浮く程度に打込んだ後にねじ締め込み機
構により上記打込みネジを締め込む空気圧式ネジ打込み
機において、 上記エアチャンバから打撃シリンダに圧縮エアを供給す
るエア供給口を少なくとも2段に形成するとともに、上
記エア供給口を選択的に開閉する切り替えバルブを外部
から操作可能に設けたことを特徴とする空気圧式ネジ打
込み機の打込み力調整機構。A striking mechanism for supplying compressed air from an air chamber for storing compressed air into a striking cylinder to strike a driver bit integrally coupled to a striking piston therein, and rotationally drives the driver bit. A screw tightening mechanism is provided, and the driver bit hits the driving screw by the hitting mechanism so that the head of the driving screw floats against the material to be driven, and then tightens the driving screw by the screw tightening mechanism. In the pneumatic screw driving machine, an air supply port for supplying compressed air from the air chamber to the striking cylinder is formed in at least two stages, and a switching valve for selectively opening and closing the air supply port can be operated from the outside. A driving force adjusting mechanism for a pneumatic screw driving machine, which is provided.
に設けた操作ダイヤルと、操作ダイヤルに連結されたバ
ルブ本体とから構成され、操作ダイヤルによってバルブ
本体が前記一方のエア供給口を選択的に開閉する請求項
1記載の空気圧式ネジ打込み機の打込み力調整機構。2. The switching valve according to claim 1, wherein the switching valve includes an operation dial provided to be operable externally, and a valve body connected to the operation dial. The operation dial allows the valve body to selectively connect the one air supply port. 2. A driving force adjusting mechanism for a pneumatic screw driving machine according to claim 1, which opens and closes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25084898A JP3520443B2 (en) | 1998-09-04 | 1998-09-04 | Driving force adjustment mechanism of pneumatic screw driving machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25084898A JP3520443B2 (en) | 1998-09-04 | 1998-09-04 | Driving force adjustment mechanism of pneumatic screw driving machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000079569A true JP2000079569A (en) | 2000-03-21 |
JP3520443B2 JP3520443B2 (en) | 2004-04-19 |
Family
ID=17213915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25084898A Expired - Lifetime JP3520443B2 (en) | 1998-09-04 | 1998-09-04 | Driving force adjustment mechanism of pneumatic screw driving machine |
Country Status (1)
Country | Link |
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JP (1) | JP3520443B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016010826A (en) * | 2014-06-27 | 2016-01-21 | 日立工機株式会社 | Pneumatic tool |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5020661B2 (en) * | 2007-03-06 | 2012-09-05 | 株式会社マキタ | Screw driving machine |
-
1998
- 1998-09-04 JP JP25084898A patent/JP3520443B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016010826A (en) * | 2014-06-27 | 2016-01-21 | 日立工機株式会社 | Pneumatic tool |
Also Published As
Publication number | Publication date |
---|---|
JP3520443B2 (en) | 2004-04-19 |
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