JPS6140510B2 - - Google Patents
Info
- Publication number
- JPS6140510B2 JPS6140510B2 JP454282A JP454282A JPS6140510B2 JP S6140510 B2 JPS6140510 B2 JP S6140510B2 JP 454282 A JP454282 A JP 454282A JP 454282 A JP454282 A JP 454282A JP S6140510 B2 JPS6140510 B2 JP S6140510B2
- Authority
- JP
- Japan
- Prior art keywords
- tool
- tip tool
- striking
- tip
- piston
- 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
Links
Landscapes
- Percussive Tools And Related Accessories (AREA)
Description
【発明の詳細な説明】
本発明は空気圧を利用した電気ハンマ等の空転
時における工具と工具保持具の連続打撃（以下空
打ちと呼ぶ）の防止に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the prevention of continuous impact (hereinafter referred to as idling) between a tool and a tool holder during idle rotation of an electric hammer or the like using air pressure.
空打ちを防止する方法としては(1)打撃子が前進
したときに別に設けた把持部材のテーパに喰い付
かせ把持する。２中間子が前進したときに中間子
の凹部に弾性体を落し込み把持する。(3)工具の前
進量を大きくとり工具保持具に当つてはね上がり
打撃点に到達するのを防ぐ。等のことがとられて
いた。上記(1)，(2)に関しそは、通常の打撃運転に
戻すときに把持部材を外すための荷重が必要であ
り操作性を損なう。又、(3)に関しては機体寸法が
大きくなり重量増、操作性が悪くなる。等の欠点
があつた。 Methods for preventing dry firing include (1) When the striker moves forward, it is gripped by biting into the taper of a separately provided gripping member. When the two mesons move forward, an elastic body is dropped into the recessed part of the two mesons and gripped. (3) The amount of advance of the tool is increased to prevent it from hitting the tool holder and reaching the impact point. etc. were taken. Regarding (1) and (2) above, a load is required to remove the gripping member when returning to normal striking operation, which impairs operability. Regarding (3), the aircraft size increases, weight increases, and maneuverability deteriorates. There were other drawbacks.
本発明の目的は、上記欠点をなくし、確実に空
打ちを防止することにより機体の損傷を防ぐこと
である。 An object of the present invention is to eliminate the above-mentioned drawbacks and prevent damage to the aircraft body by reliably preventing dry firing.
本発明はこの種の工具の空打ち現象がピストン
−打撃子−工具の動作の周期が一致して起こるこ
とに着目し、工具が工具保持具に当つてはね上が
るときに工具保持材の段部に当たりばね上がりを
防害し、工具の周期をみだして空打ちを停止させ
るよう工夫したものである。 The present invention focuses on the fact that this type of tool blank firing phenomenon occurs when the operation cycles of the piston, striker, and tool coincide, and when the tool hits the tool holder and springs up, it hits the stepped part of the tool holder. It was devised to prevent damage from spring lifting, extend the cycle of the tool, and stop dry firing.
以下図示実施例により本発明を説明する。 The present invention will be explained below with reference to illustrated embodiments.
第１図において、１はクランクシヤフト、２は
コネクテイングロツド、３はピストンピン、４は
ピストンでありこの構成でシリンダ５を案内とし
てクランクシヤツト１の回転をピストン４の往復
動に変換している。６は打撃子で摺動可能にシリ
ンダ５に取付けられている。７はシール材、８は
中間子で摺動可能にシリンダ５に取付けられてい
る。９は工具保持部材、１０は工具であり工具保
持部材９に案内され摺動可能に取付いている。１
１は工具保持具であり工具保持部材９に偏心して
固定され先端工具内の凸部１５と干渉して抜け止
めをする。１２はシリンダ５に設けられた孔であ
り打撃子６が前進すると空気室１３を大気圧にす
る。このためピストン４の往復動によつて打撃子
６が運動しなくなり打撃子６の動作が停止する。
本構成における動作を第２図により説明する。(1)
のパターンが工具を打撃している状態である。(2)
のパターンは(1)の状態から先端工具１０を被加工
物から離したときである。工具保持具１１に当つ
てはね上がつた先端工具内とピストン４で追い返
された打撃子６によつて再度衝突が起こり周期の
一致したところで連続的に打撃する、これが空打
ちである。(3)のパターンは本案をとり入れたとき
の動作である。先端工具１０は工具保持具１１に
当つてはね上がるときに偶力により凸部１５が段
部１４に当り速度が減速される。このため、(2)の
パターンが維持出来なくなり、打撃子６は孔１２
を通過して停止に至る。 In Fig. 1, 1 is a crankshaft, 2 is a connecting rod, 3 is a piston pin, and 4 is a piston. With this configuration, the rotation of the crankshaft 1 is converted into reciprocating motion of the piston 4 using the cylinder 5 as a guide. ing. 6 is slidably attached to the cylinder 5 with a striker. 7 is a sealing material, and 8 is an intermediate member which is slidably attached to the cylinder 5. 9 is a tool holding member, and 10 is a tool, which is guided and slidably attached to the tool holding member 9. 1
Reference numeral 1 denotes a tool holder, which is eccentrically fixed to the tool holder 9 and interferes with a protrusion 15 in the tip tool to prevent it from coming off. 12 is a hole provided in the cylinder 5, and when the striker 6 moves forward, the air chamber 13 is brought to atmospheric pressure. Therefore, the striker 6 does not move due to the reciprocating movement of the piston 4, and the operation of the striker 6 is stopped.
The operation in this configuration will be explained with reference to FIG. (1)
This pattern shows the tool being hit. (2)
The pattern shown in (1) is when the tip tool 10 is released from the workpiece in the state (1). The inside of the tip tool that bounces up when it hits the tool holder 11 collides again with the striking element 6 that has been driven back by the piston 4, and the striking occurs continuously at the same period, which is dry striking. Pattern (3) is the behavior when the main idea is adopted. When the tip tool 10 hits the tool holder 11 and springs up, the convex portion 15 hits the stepped portion 14 due to a couple, and the speed is reduced. For this reason, the pattern (2) cannot be maintained, and the striker 6 is inserted into the hole 12.
passes through and comes to a stop.
本発明の実施例は段部にて説明ししが一部分の
凸起でも同様効果は得られる。 Although the embodiment of the present invention will be described with reference to the stepped portion, the same effect can be obtained even if only a portion of the convex portion is formed.
以上のように本発明によれば、先端工具のはね
上がりの周期をみだすようにしたので、通常の打
撃時の操作性を損うことなく、空打ちを防止出来
る。かつ、工具を短かく出来るので機体の小さい
安価な打撃工具を提供することができる。 As described above, according to the present invention, since the period of the tip tool's springing up is made to exceed the period, dry striking can be prevented without impairing the operability during normal striking. Moreover, since the tool can be shortened, an inexpensive impact tool with a small body can be provided.
第１図は従来の電気ハンマーの一部縦断側面
図、第２図は主構成部品の動作説明図、第３図は
本発明による通常打撃時のときの部分断面図、第
４図は本発明部分が働いたときの部分断面図であ
る。
図において４はピストン、６は打撃子、１０は
先端工具、９は工具保持部材、１１は工具保持
具、１５は先端工具の凸部、１４は工具保持部材
の段部である。
Fig. 1 is a partially longitudinal side view of a conventional electric hammer, Fig. 2 is an explanatory view of the operation of the main components, Fig. 3 is a partially sectional view during normal striking according to the present invention, and Fig. 4 is the present invention. It is a partial sectional view when the part is working. In the figure, 4 is a piston, 6 is a striking element, 10 is a tip tool, 9 is a tool holding member, 11 is a tool holder, 15 is a convex portion of the tip tool, and 14 is a stepped portion of the tool holding member.
Claims (1)
る打撃子を有し先端工具に打撃を与える打撃工具
において、前記先端工具を保持する工具保持部材
に偏心して配設された工具保持具と、前記工具保
持部材の内壁に、前記工具保持具に前記先端工具
が衝突しその跳ね返り時に発生する偶力により前
記先端工具に形成された凸部が突き当るよう形成
した段部とにより前記先端工具の跳ね返り速度を
減速するよう構成したことを特徴とする空打ち防
止装置。1. A striking tool that has a striking element driven by the reciprocating motion of a piston and air pressure and that strikes a tip tool; The tip tool rebounds due to a stepped portion formed on the inner wall of the tool holding member so that the convex portion formed on the tip tool abuts against the tip tool due to a couple generated when the tip tool collides with the tool holder and bounces back. A dry firing prevention device characterized by being configured to reduce speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP454282A JPS58120474A (en) | 1982-01-12 | 1982-01-12 | Apparatus for preventing impact error of impact tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP454282A JPS58120474A (en) | 1982-01-12 | 1982-01-12 | Apparatus for preventing impact error of impact tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58120474A JPS58120474A (en) | 1983-07-18 |
| JPS6140510B2 true JPS6140510B2 (en) | 1986-09-09 |
Family
ID=11586930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP454282A Granted JPS58120474A (en) | 1982-01-12 | 1982-01-12 | Apparatus for preventing impact error of impact tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58120474A (en) |
-
1982
- 1982-01-12 JP JP454282A patent/JPS58120474A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58120474A (en) | 1983-07-18 |
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