JP4701084B2 - Air hammer - Google Patents

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JP4701084B2
JP4701084B2 JP2005374759A JP2005374759A JP4701084B2 JP 4701084 B2 JP4701084 B2 JP 4701084B2 JP 2005374759 A JP2005374759 A JP 2005374759A JP 2005374759 A JP2005374759 A JP 2005374759A JP 4701084 B2 JP4701084 B2 JP 4701084B2
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chisel
cylinder
air hammer
flange
holder
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JP2007175797A (en
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勝啓 井田
眞人 岡
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Nippon Pneumatic Manufacturing Co Ltd
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Nippon Pneumatic Manufacturing Co Ltd
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Description

本発明は、エアハンマに関する。特に鋳造されたワークに付着している砂などを落とすのに適したエアハンマ、いわゆるノックアウトマシンに用いられるエアハンマに関する。   The present invention relates to an air hammer. In particular, the present invention relates to an air hammer suitable for dropping sand or the like adhering to a cast workpiece, that is, an air hammer used for a so-called knockout machine.

従来のノックアウトマシンに用いるエアハンマとして、特開平7−323368号公報に記載のものがある。(特許文献1参照)。このエアハンマにおいては、シリンダにチゼルが挿入された状態でシリンダ先端外周に形成されたバネねじ込み部にバネをねじ込んでシリンダにチゼルを取り付けるようになっている。
上記ノックアウトマシンでは、複数のエアハンマがボックス内に配され、エアハンマによってワークを叩いてワークに付着している砂などを落とすようになっている。
特開平7−323368号公報
As an air hammer used in a conventional knockout machine, there is one described in JP-A-7-323368. (See Patent Document 1). In this air hammer, a chisel is attached to a cylinder by screwing a spring into a spring screw-in part formed on the outer periphery of the cylinder tip with the chisel inserted into the cylinder.
In the knockout machine, a plurality of air hammers are arranged in a box, and the workpieces are struck by the air hammers to remove sand and the like adhering to the workpieces.
JP-A-7-323368

上記エアハンマでは、チゼルがバネにより支持されているため、チゼルが破損しても、例えば、途中で折れてしまってもチゼルはバネにより破損前と同じ状態に保たれる。しかしながらチゼルが破損すると、ピストンによりチゼルが打撃されてもチゼルによりワークを適切に叩くことができず、ワークに付着した砂などを落とすことができない。したがって、破損したチゼルは早急に交換の必要がある。にもかかわらず、上記エアハンマではチゼルは見かけ上、破損前の正規の状態を保っているため、目視により破損を確認することができず、エアハンマの作動を止めて逐次確認する必要があり、交換が遅れてしまう。
本発明は上記問題を解決することを課題とし、目視によりチゼルの破損を確認できるエアハンマを提供することを目的とする。
In the air hammer, since the chisel is supported by the spring, even if the chisel is broken, for example, it is broken in the middle, the chisel is kept in the same state as before the breakage by the spring. However, if the chisel is broken, even if the chisel is struck by the piston, the work cannot be hit properly by the chisel, and sand attached to the work cannot be dropped. Therefore, a damaged chisel needs to be replaced immediately. Nevertheless, in the above air hammer, the chisel is apparently kept in the normal state before breakage, so it is not possible to confirm damage visually, it is necessary to stop the operation of the air hammer and check it one after another. Will be delayed.
It is an object of the present invention to provide an air hammer capable of confirming damage to a chisel by visual observation.

上記課題を解決するために、
本発明のエアハンマは、シリンダ内に配されたピストンと、先端部がシリンダから突出するとともにピストンにより打撃されるチゼルと、シリンダの前端に設けられかつチゼルが貫通するチゼル貫通開口が開けられたチゼルホルダとを備え、チゼルが破損した際に、チゼルをチゼルホルダから脱落させるチゼル脱落手段を備えている、
ものである。
To solve the above problem,
An air hammer according to the present invention includes a piston disposed in a cylinder, a chisel that projects from the cylinder with a tip protruding from the cylinder, and a chisel holder that is provided at the front end of the cylinder and has a chisel through-opening through which the chisel passes. And a chisel removal means for removing the chisel from the chisel holder when the chisel is broken.
Is.

上記エアハンマにおいて、チゼル脱落手段が、チゼル貫通開口が偏心した位置にかつ真円状をなすように開けられているチゼルホルダと、チゼル貫通開口の直径より小さい直径のフランジを有しているチゼルとを備えている、ことがある。
又は、チゼル脱落手段が、チゼル破損時に、チゼルの破損部分が脱落しうる切り欠きを備えている、ことがある。
In the above air hammer, the chisel removal means includes a chisel holder that is opened at a position where the chisel through opening is eccentric and has a perfect circle shape, and a chisel having a flange having a diameter smaller than the diameter of the chisel through opening. I have.
Alternatively, the chisel drop-off means may include a notch from which the broken portion of the chisel can drop when the chisel is broken.

さらに又、チゼル脱落手段が、チゼル貫通開口が偏心した位置にかつ真円状をなすように開けられているチゼルホルダと、チゼル貫通開口の直径より小さい長径の楕円状フランジと、チゼルホルダ内に設けられたチゼル回り止め部材とを有し、
チゼル回り止め部材に、チゼルのフランジに適合した楕円状孔が開けられているとともに、チゼル回り止め部材の前端下部が切り落とされている、ことがある。
Further, the chisel removal means is provided in the chisel holder, the chisel holder that is opened so as to form a perfect circle at a position where the chisel through opening is eccentric, an elliptical flange having a long diameter smaller than the diameter of the chisel through opening, and A chisel detent member,
The chisel detent member may be provided with an elliptical hole adapted to the chisel flange, and the front end lower portion of the chisel detent member may be cut off.

本発明のエアハンマによれば、チゼルが破損すると、チゼルの破損部分がチゼルホルダから脱落するので、チゼルの破損が目視により即座に確認でき、チゼル脱落手段を簡単な構成で実現できる。さらに、チゼルのフランジの長径がチゼルの貫通開口の直径より小さいので、シリンダにチゼルホルダを取り付けた状態で、チゼルをシリンダに挿入することも可能となる。そしてフランジをホルダ内に挿入した後、フランジを90度回転させれば、前方から見てフランジの一部とチゼルホルダの開口縁の一部とが重なる状態となる。又、このチゼルの状態はチゼル回り止め部材によって保持される。したがって、エアハンマ作動中にもチゼルがシリンダから抜け出ることがない。このように、本発明のエアハンマにおいては、シリンダにチゼルホルダを取り付けたままチゼルを取り付けることができる。また上記と逆の手順で行えばチゼルをシリンダから取り外せるのはもちろんである。 According to the air hammer of the present invention , when the chisel is broken, the broken portion of the chisel is dropped from the chisel holder, so that the breakage of the chisel can be immediately confirmed visually , and the chisel dropping means can be realized with a simple configuration. Furthermore, since the diameter of the chisel flange is smaller than the diameter of the through opening of the chisel, in the state of attaching the Chizeruhoruda to the cylinder, it is possible to insert a chisel into the cylinder. Then, after inserting the flange into the holder, if the flange is rotated 90 degrees, a part of the flange and a part of the opening edge of the chisel holder are overlapped when viewed from the front. The state of the chisel is held by a chisel detent member. Therefore, the chisel does not come out of the cylinder even during operation of the air hammer. Thus, in the air hammer of the present invention, the chisel can be attached while the chisel holder is attached to the cylinder. Of course, the chisel can be removed from the cylinder by reversing the above procedure.

以下、図面を参照して本発明の実施形態のエアハンマについて説明する。
図1〜図3には本発明の第一実施形態のエアハンマが示されている。
エアハンマ1は、シリンダ2と、シリンダ2内に配されたピストン3と、先端部がシリンダ2から突出するとともにピストン3により打撃されるチゼル4と、シリンダ2の前端にシリンダ2から突出するように取り付けられかつチゼル4が貫通するチゼル貫通開口5aが開けられたチゼルホルダ5と、チゼルホルダ5内に配されたチゼル回り止め部材6とを備えている。
Hereinafter, an air hammer according to an embodiment of the present invention will be described with reference to the drawings.
1 to 3 show an air hammer according to a first embodiment of the present invention.
The air hammer 1 includes a cylinder 2, a piston 3 disposed in the cylinder 2, a tip part protruding from the cylinder 2 and a chisel 4 struck by the piston 3, and a front end of the cylinder 2 protruding from the cylinder 2. A chisel holder 5 which is attached and has a chisel penetration opening 5a through which the chisel 4 passes is provided, and a chisel detent member 6 disposed in the chisel holder 5 is provided.

シリンダ2には、ピストン3を往復動させるための圧縮空気通路、空気室および弁機構が形成されているが、これらは公知の構成を有するものであり、詳細な説明は省略する。シリンダ2の先端外周にはチゼルホルダ5を取り付けるための雄ねじ2aが形成されている。そしてシリンダ2先端内部にチゼル4を保持するブッシュ7が取り付けられている。
チゼル4は長さ方向中央に楕円状のフランジ4aを有し、フランジ4aより後の部分がシリンダ2のブッシュ7に往復動自在に挿入されており、チゼル4の後端面がピストン3により打撃されるようになっている。
The cylinder 2 is formed with a compressed air passage, an air chamber, and a valve mechanism for reciprocating the piston 3, but these have a known configuration and will not be described in detail. A male screw 2 a for attaching the chisel holder 5 is formed on the outer periphery of the tip of the cylinder 2. A bush 7 for holding the chisel 4 is attached inside the tip of the cylinder 2.
The chisel 4 has an elliptical flange 4a at the center in the length direction, and a portion after the flange 4a is inserted into the bush 7 of the cylinder 2 so as to be able to reciprocate. The rear end surface of the chisel 4 is hit by the piston 3. It has become so.

チゼルホルダ5は前壁を有する短円筒状をなし、後端部内周に、シリンダの雄ねじ2aに嵌め合わされた雌ねじ5bが形成されている。
チゼルホルダ5の前端には真円状のチゼル貫通開口5aが開けられているが、このチゼル貫通開口5aの中心は、チゼルホルダ5の中心とは偏心した位置にある。このエアハンマ1においては、例えば図2に示すように下方に偏心した位置にチゼル貫通開口5aがある。そして、チゼル貫通開口5aの直径はチゼル4のフランジ4aの長径より大きくなっている。又、チゼル貫通開口5aの内側上縁部にはテーパ面5bが形成されている。
チゼル貫通開口5aの偏心量および直径は、チゼル4のフランジ4aと以下に述べるような関係にある。図2(a)に示すように、フランジ4aの長径が横に伸びる状態にすればチゼルホルダ5をシリンダ2に取り付けた状態のまま、ブッシュ7にチゼル4を挿入することができる位置にチゼル貫通開口5aはある。そして、図2(b)に示すように、フランジ4aの長径が縦に伸びる状態にすればチゼル貫通開口5aの上縁とチゼル4のフランジ4aの上部とが、前方から見て重なるようになっている。
すなわち、チゼル貫通開口5aの中心O1とチゼル3の軸中心O2とは以下の関係を満たすような位置にある。チゼル3の軸中心O2からチゼル貫通開口5aの縁部までの垂直長さは、チゼル4のフランジ4aの長径より短くかつ短径より長くなっている。また、チゼルの軸中心O2からチゼル貫通開口5aの縁部までの水平長さは、チゼル4のフランジ4aの長径より長くなっている。
The chisel holder 5 has a short cylindrical shape having a front wall, and a female screw 5b fitted to the male screw 2a of the cylinder is formed on the inner periphery of the rear end portion.
At the front end of the chisel holder 5, a perfect circular chisel through-opening 5 a is opened. The center of the chisel through-opening 5 a is offset from the center of the chisel holder 5. In the air hammer 1, for example, as shown in FIG. 2, there is a chisel through opening 5 a at a position eccentric downward. The diameter of the chisel penetration opening 5a is larger than the major diameter of the flange 4a of the chisel 4. A tapered surface 5b is formed on the inner upper edge of the chisel through opening 5a.
The amount of eccentricity and the diameter of the chisel through opening 5a are related to the flange 4a of the chisel 4 as described below. As shown in FIG. 2 (a), if the long diameter of the flange 4a extends sideways, the chisel penetrating opening is at a position where the chisel 4 can be inserted into the bush 7 with the chisel holder 5 attached to the cylinder 2. Is 5a. Then, as shown in FIG. 2 (b), if the major axis of the flange 4a is extended vertically, the upper edge of the chisel through opening 5a and the upper portion of the flange 4a of the chisel 4 are overlapped when viewed from the front. ing.
That is, the center O1 of the chisel through opening 5a and the axial center O2 of the chisel 3 are in a position satisfying the following relationship. The vertical length from the axial center O2 of the chisel 3 to the edge of the chisel through opening 5a is shorter than the major axis of the flange 4a of the chisel 4 and longer than the minor axis. Further, the horizontal length from the center O2 of the chisel to the edge of the chisel through opening 5a is longer than the long diameter of the flange 4a of the chisel 4.

チゼル回り止め部材6は短円筒状をなし、図3に示すように、中央にチゼル4のフランジ4aに適合する楕円貫通孔6aが開けられている。楕円貫通孔6aは上下方向の径が長径となっており、チゼル4が往復動する際、フランジ4aが楕円貫通孔6aにより案内されるのでフランジ4aの長径が縦方向に位置した状態が保たれる。そして、チゼル回り止め部材6の中央より下方前側の部分が切り落とされて切り欠き6bが形成されている。
上記のような構成を有するエアハンマ1において、チゼル4がフランジ4aより後で破損すると、破損したチゼル4の前方部分は、チゼル回り止め部材6の切り欠き6aまで前進して下方に落ちる。そして、図2(c)に示すように、チゼルホルダ5のチゼル貫通開口5aの直径がフランジ4aの長径より大きいので、破損したチゼル4の部分がチゼル貫通開口5aのテーパ面5bを滑り、チゼルホルダ5から抜け出るので、チゼル4の破損が目視で確認できる。又、ブッシュ7内に残ったチゼル4の後部はピストン3の打撃によりブッシュ7から抜け出る。
The chisel detent member 6 has a short cylindrical shape, and an elliptical through hole 6a that fits the flange 4a of the chisel 4 is formed at the center as shown in FIG. The elliptical through hole 6a has a long diameter in the vertical direction. When the chisel 4 reciprocates, the flange 4a is guided by the elliptical through hole 6a, so that the long diameter of the flange 4a is maintained in the vertical direction. It is. Then, a lower front side portion from the center of the chisel detent member 6 is cut off to form a notch 6b.
In the air hammer 1 having the above-described configuration, when the chisel 4 is broken after the flange 4a, the front portion of the broken chisel 4 advances to the notch 6a of the chisel detent member 6 and falls downward. As shown in FIG. 2 (c), since the diameter of the chisel through opening 5a of the chisel holder 5 is larger than the long diameter of the flange 4a, the broken portion of the chisel 4 slides on the tapered surface 5b of the chisel through opening 5a. Since it comes out of the case, it can be visually confirmed that the chisel 4 is broken. Further, the rear part of the chisel 4 remaining in the bush 7 comes out of the bush 7 by striking the piston 3.

なお、上記実施形態のエアハンマ1では、チゼルホルダ5をシリンダ2に取り付けた状態のままでシリンダ2のブッシュ7にチゼル4を挿入するために、チゼル4のフランジ4aが楕円状となっているが、シリンダ2のブッシュ7にチゼル4を挿入してからチゼルホルダ5をシリンダ2に取り付けるのであれば、フランジは円状であってもよい。この場合、フランジの直径がチゼルホルダ5のチゼル貫通開口5aの直径より小さければよい。チゼルホルダ5のチゼル貫通開口5aが偏心した位置にあり、前方から見た際、フランジの一部とチゼル貫通開口5aの周縁の一部が重なるのは変わりない。また、フランジが円状の場合、チゼル回り止め部材6は必要ない。 In the air hammer 1 of the above embodiment, the flange 4a of the chisel 4 is elliptical in order to insert the chisel 4 into the bush 7 of the cylinder 2 with the chisel holder 5 attached to the cylinder 2. If the chisel holder 5 is attached to the cylinder 2 after the chisel 4 is inserted into the bush 7 of the cylinder 2, the flange may be circular. In this case, it is only necessary that the diameter of the flange is smaller than the diameter of the chisel through opening 5a of the chisel holder 5. The chisel through-opening 5a of the chisel holder 5 is in an eccentric position, and when viewed from the front, a part of the flange and a part of the periphery of the chisel through-opening 5a overlap with each other. Further, when the flange is circular, the chisel detent member 6 is not necessary.

ついで、図4および図5を参照して本発明の第二実施形態のエアハンマ11について説明する。なお、以下の説明において第一実施形態のエアハンマ1と同一および対応する部分には同一の符号を付し、説明は省略する。
このエアハンマ11は、シリンダ2からチゼルホルダ8を取り外した後に、チゼル9の取り付けおよび取外しを行うタイプのものであり、以下に述べる構成を有する。
このエアハンマ11ではチゼルホルダ8は、シリンダ2の雄ねじ2aに嵌め合わされた雌ねじ部8dと、雌ねじ部8dから前方に突出した断面半円弧状部8aと、断面半円弧状部8aの前端に形成された垂下状半円板状部8bとを備えている。半円板状部8bには雄ねじ部8dの軸心と中心が一致する半円状の切り欠き8fが形成されている。切り欠きの直径は、チゼル9のフランジ9a以外の部分の直径よりわずかに大きくなっている。又、チゼル9のフランジ9aは、切り欠き8fの径より大径の円状をなしている。
Next, the air hammer 11 according to the second embodiment of the present invention will be described with reference to FIGS. In addition, in the following description, the same code | symbol is attached | subjected to the part which is the same as that of the air hammer 1 of 1st embodiment, and respond | corresponds, and description is abbreviate | omitted.
The air hammer 11 is of a type in which the chisel 9 is attached and detached after the chisel holder 8 is removed from the cylinder 2 and has the following configuration.
In the air hammer 11, the chisel holder 8 is formed at the front end of the female screw portion 8d fitted to the male screw 2a of the cylinder 2, the semicircular arc portion 8a projecting forward from the female screw portion 8d, and the semicircular arc portion 8a. And a hanging semicircular disk-shaped portion 8b. The semicircular plate-like portion 8b is formed with a semicircular cutout 8f whose center coincides with the axis of the male screw portion 8d. The diameter of the notch is slightly larger than the diameter of the chisel 9 other than the flange 9a. The flange 9a of the chisel 9 has a circular shape with a diameter larger than the diameter of the notch 8f.

このエアハンマ11においては、チゼル9がフランジ9aより後で破損しても、破損したチゼル9の部分は即座に下方に落ちるのでチゼル9の破損が目視で確認できる。このエアハンマ11で、シリンダ2にチゼル9を取り付けるには、チゼルホルダ8をシリンダ2から取り外してから、ブッシュ7にチゼル9を挿入する。この後、シリンダにチゼルホルダ8を取り付ければよい。
なお、上記の第一および第二実施形態のエアハンマ1、11であれば、目視によりチゼル4,9の破損を確認できるだけでなく、チゼル4,9のフランジ4a、9aより前の部分の状態を確認する位置センサをチゼルホルダ5,8の前端部に配すれば、チゼル4,9が破損した際、位置センサによりチゼル4,9の破損を容易に確認することもできる。
In this air hammer 11, even if the chisel 9 is broken after the flange 9a, the broken portion of the chisel 9 immediately falls downward, so that the breakage of the chisel 9 can be visually confirmed. In order to attach the chisel 9 to the cylinder 2 with this air hammer 11, the chisel 9 is inserted into the bush 7 after the chisel holder 8 is removed from the cylinder 2. Thereafter, the chisel holder 8 may be attached to the cylinder.
If the air hammers 1 and 11 of the first and second embodiments described above are used, not only can the chisels 4 and 9 be visually checked for damage, but also the state of the chisel 4 and 9 before the flanges 4a and 9a. If the position sensor to be confirmed is arranged at the front end portion of the chisel holders 5 and 8, when the chisel 4 or 9 is damaged, the position sensor can easily confirm the damage of the chisel 4 or 9.

なお、本発明のエアハンマは上記実施形態のものには限られず、各部構成は適宜変更自在である。
また、上記実施形態では、水平な状態にあるエアハンマについて説明したが、エアハンマは上向きあるいは下向きであっても使用可能である。上向きに使用する場合、第一実施形態のエアハンマではチゼルの破損部分がチゼルホルダから離脱しないことがあるが、この場合でもチゼルの破損部分は傾いた状態となるので、破損前の状態とは異なり、破損したことを目視で、あるいは位置センサで確認することが可能である。
Note that the air hammer of the present invention is not limited to that of the above embodiment, and the configuration of each part can be changed as appropriate.
In the above embodiment, the air hammer in a horizontal state has been described. However, the air hammer can be used even when it is upward or downward. When used upward, in the air hammer of the first embodiment, the broken portion of the chisel may not be detached from the chisel holder, but even in this case, the broken portion of the chisel is inclined, so unlike the state before breakage, It is possible to confirm the damage visually or with a position sensor.

本発明の第一実施形態のエアハンマーの断面図である。It is sectional drawing of the air hammer of 1st embodiment of this invention. (a) は、同エアハンマーのチゼル挿入時の正面図、(b)は、チゼル装着時の正面図、(c)は、チゼル破損時の正面図である。(a) is a front view when the chisel of the air hammer is inserted, (b) is a front view when the chisel is mounted, and (c) is a front view when the chisel is broken. (a)は、同エアハンマのチゼル回り止め部材の正面図、(b)は、同チゼル回り止め部材の断面図である。(a) is a front view of the chisel detent member of the air hammer, and (b) is a cross-sectional view of the chisel detent member. 本発明の第二実施形態のエアハンマーの断面図である。It is sectional drawing of the air hammer of 2nd embodiment of this invention. 同エアハンマーの正面図である。It is a front view of the air hammer.

符号の説明Explanation of symbols

1 エアハンマ
2 シリンダ
2a 雄ねじ
3 ピストン
4 チゼル
4a フランジ
5 チゼルホルダ
5a チゼル貫通開口
5b 雌ねじ
6 チゼル回り止め部材
6a 楕円貫通孔
7 切り欠き
7 ブッシュ
8 チゼルホルダ
8a 断面半円弧状部
8b 垂下状半円状部
8d 雌ねじ部
8f 切り欠き
9 チゼル
9a フランジ
11
エアハンマ
1 Air hammer 2 Cylinder
2a Male thread 3 Piston 4 Chisel
4a Flange 5 Chisel holder
5a Chisel through opening
5b Female screw 6 Chisel detent member
6a Elliptical through hole 7 Notch 7 Bush 8 Chisel holder
8a Semicircular arc section
8b Drooping semicircular part
8d Female thread
8f Notch 9 Chisel
9a flange
11
Air hammer

Claims (1)

シリンダ内に配されたピストンと、先端部がシリンダから突出するとともにピストンにより打撃されるチゼルと、シリンダの前端に設けられたかつチゼルが貫通するチゼル貫通開口が開けられたチゼルホルダとを備え、チゼルが破損した際に、チゼルホルダからチゼルを脱落させるチゼル脱落手段を備えており、チゼル脱落手段が、チゼル貫通開口が偏心した位置にかつ真円状をなすように開けられているチゼルホルダと、チゼル貫通開口の直径より小さい長径の楕円状フランジを備えたチゼルと、チゼルホルダ内に設けられたチゼル回り止め部材とを有し、チゼル回り止め部材に、チゼルのフランジに適合した楕円状孔が開けられているとともに、チゼル回り止め部材の前端下部が切り落とされているエアハンマ。
A chisel comprising a piston disposed in the cylinder, a chisel that projects from the cylinder with a tip projecting from the cylinder, and a chisel holder that is provided at the front end of the cylinder and has a chisel penetration opening through which the chisel passes. A chisel removal means for removing the chisel from the chisel holder when it breaks, and the chisel removal means is opened at a position where the chisel penetration opening is eccentric and in a circular shape, and the chisel penetration It has a chisel with an elliptical flange having a long diameter smaller than the diameter of the opening, and a chisel detent member provided in the chisel holder, and the chisel detent member has an oval hole adapted to the chisel flange. An air hammer in which the lower part of the front end of the chisel detent member is cut off.
JP2005374759A 2005-12-27 2005-12-27 Air hammer Active JP4701084B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005374759A JP4701084B2 (en) 2005-12-27 2005-12-27 Air hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005374759A JP4701084B2 (en) 2005-12-27 2005-12-27 Air hammer

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Publication Number Publication Date
JP2007175797A JP2007175797A (en) 2007-07-12
JP4701084B2 true JP4701084B2 (en) 2011-06-15

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Country Status (1)

Country Link
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5088501U (en) * 1973-12-18 1975-07-26
JPS5652687U (en) * 1979-09-29 1981-05-09
JPS61109687U (en) * 1984-12-24 1986-07-11
JPS63278735A (en) * 1987-04-21 1988-11-16 サンドビック アクティエボラーグ Tool assembly and assembling method thereof
JPH1190860A (en) * 1997-07-29 1999-04-06 Chicago Pneumatic Tool Co Impact tool, device, anvil for impact tool, dog hammer for impact tool, and timing shaft for impact tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5088501U (en) * 1973-12-18 1975-07-26
JPS5652687U (en) * 1979-09-29 1981-05-09
JPS61109687U (en) * 1984-12-24 1986-07-11
JPS63278735A (en) * 1987-04-21 1988-11-16 サンドビック アクティエボラーグ Tool assembly and assembling method thereof
JPH1190860A (en) * 1997-07-29 1999-04-06 Chicago Pneumatic Tool Co Impact tool, device, anvil for impact tool, dog hammer for impact tool, and timing shaft for impact tool

Also Published As

Publication number Publication date
JP2007175797A (en) 2007-07-12

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