JP2675247B2 - Hammer equipment - Google Patents
Hammer equipmentInfo
- Publication number
- JP2675247B2 JP2675247B2 JP9199993A JP9199993A JP2675247B2 JP 2675247 B2 JP2675247 B2 JP 2675247B2 JP 9199993 A JP9199993 A JP 9199993A JP 9199993 A JP9199993 A JP 9199993A JP 2675247 B2 JP2675247 B2 JP 2675247B2
- Authority
- JP
- Japan
- Prior art keywords
- hammer
- chamber
- hole
- pressure chamber
- dead center
- 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 - Fee Related
Links
Landscapes
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鍛造あるいは土木工事
のパイプを打撃して土中に埋設する際など、打撃力を発
生するハンマー装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hammer device for generating a striking force when a pipe for forging or civil engineering is hit and buried in the ground.
【０００２】[0002]
【従来の技術】この種の装置は特開平３−１６６０７０
号公報によって開示してある。その構成の概要を図７に
示しているように、筒体１に内鍔２を突設し、その内鍔
２で筒体を分離して、一方の加圧室３内に主ピストン４
を駆動装置５で可動するように設け、主ピストン４より
筒体１内の他のハンマー室６へ突入するように設けた吊
り軸７に従ピストン８を設け、吊り軸７の従ピストン８
より上部にハンマー９を摺動可能に貫通してあり、また
ハンマー９の凸部１０が内鍔２内に凸部シール１１を介
して突入するようになっている。更にハンマー９に通気
孔１２と挿入孔１３を有し、通気孔１２は、主ピストン
４と内鍔２間の加圧室３と、従ピストン８とハンマー９
との間の背圧室１４間に通じるものであり、一方挿入孔
１３は、吊り軸７の外周面に設けた凹溝１５と、内鍔２
とハンマー９間の発射室１６間に通じるように設けてあ
る。また、加圧室３と発射室１６との間に、発射室から
加圧室へ流動するチェック弁１７が介在してある。2. Description of the Related Art An apparatus of this type is disclosed in Japanese Patent Laid-Open No. 3-166070.
It is disclosed by the Japanese Patent Publication. As shown in the outline of the configuration in FIG. 7, an inner collar 2 is provided on the cylindrical body 1 so that the cylindrical body is separated by the inner collar 2 and the main piston 4 is inserted into one pressurizing chamber 3.
Is provided so as to be movable by the drive device 5, and a subordinate piston 8 of the suspension shaft 7 provided so as to protrude from the main piston 4 into another hammer chamber 6 in the cylindrical body 1 is provided.
The hammer 9 is slidably penetrated to the upper part, and the convex portion 10 of the hammer 9 is projected into the inner flange 2 via the convex portion seal 11. Further, the hammer 9 has a vent hole 12 and an insertion hole 13. The vent hole 12 includes the pressurizing chamber 3 between the main piston 4 and the inner flange 2, the slave piston 8 and the hammer 9.
Between the back pressure chamber 14 and the back pressure chamber 14, and the insertion hole 13 has a concave groove 15 formed on the outer peripheral surface of the suspension shaft 7 and an inner collar 2
It is provided so as to communicate with the firing chamber 16 between the hammer 9 and the hammer 9. Further, a check valve 17 that flows from the firing chamber to the pressure chamber is interposed between the pressure chamber 3 and the firing chamber 16.
【０００３】上記主ピストン４を駆動装置５で下死点へ
向かって押し進めると、加圧室３の空気が圧縮され始
め、その圧縮空気がハンマー９の通気孔１２を通じて背
圧室１４に流入するため、従ピストン８が下死点に向か
って進むが、背圧室１４の圧縮空気によってハンマー９
は依然として上死点に保持している。しかし吊り軸７が
更に進み吊り軸７に設けた凹溝１５が挿入孔１３に達す
ると、加圧室３の圧縮空気が発射室１６に流入すること
から、ハンマー９は一挙に下死点に向かって突進するも
のである。以後駆動装置５の復動作用により主ピストン
４が上死点へ復動し、これに伴ってハンマー９が従ピス
トン８によって吊り上げられるが、ハンマー９の凸部シ
ール１１が内鍔２の内周面に挿入した時点から、加圧室
３と発射室１６とが分離され、更にハンマーの復動に応
じてその発射室１６の容積が縮小して空気が圧縮される
ことから、チェック弁１７を通じて加圧室３に帰流する
ものである。When the main piston 4 is pushed toward the bottom dead center by the drive device 5, the air in the pressurizing chamber 3 starts to be compressed, and the compressed air flows into the back pressure chamber 14 through the ventilation hole 12 of the hammer 9. Therefore, the secondary piston 8 advances toward the bottom dead center, but the compressed air in the back pressure chamber 14 causes the hammer 9 to move.
Is still at top dead center. However, when the suspension shaft 7 further advances and the concave groove 15 provided in the suspension shaft 7 reaches the insertion hole 13, the compressed air in the pressurizing chamber 3 flows into the firing chamber 16, so that the hammer 9 moves to the bottom dead center at once. It rushes toward you. After that, the main piston 4 is moved back to the top dead center by the backward movement of the drive device 5, and the hammer 9 is lifted up by the secondary piston 8 accordingly, but the convex seal 11 of the hammer 9 causes the inner periphery of the inner collar 2 to move. Since the pressurizing chamber 3 and the firing chamber 16 are separated from the time of insertion into the surface, and the volume of the firing chamber 16 is reduced and the air is compressed according to the backward movement of the hammer, air is compressed through the check valve 17. It returns to the pressurizing chamber 3.
【０００４】[0004]
【発明が解決しようとする課題】しかし上記従来の装置
では、前述のように復動時に、発射室の空気がチェック
弁を通じて加圧室に帰流するが、チェック弁にはクラッ
キング圧を内在するものであるから、ハンマーが完全に
上死点に至った際の発射室内の圧力は、加圧室内の圧力
にチェック弁のクラッキング圧をプラスした圧力とな
り、即ち発射室の圧力が加圧室の圧力より高くなるもの
であった。そのため、ハンマーを確実に上死点まで復動
するためには、駆動装置の戻り力を大きくする必要があ
り、こうして上死点まで確実に戻し次ぎに発射する際、
主ピストンを前進するが、発射室内の圧力が高いため
に、背圧室の圧力による作用力とバランスするまでハン
マーも同様に前進してその位置に保持されるが、その前
進した分ハンマーの加速距離が少なくなり速度効率を低
下する結果を招くものであった。However, in the above-mentioned conventional apparatus, as described above, when returning, the air in the firing chamber returns to the pressurizing chamber through the check valve, but the check valve has a cracking pressure. Therefore, the pressure in the firing chamber when the hammer completely reaches the top dead center is the pressure in the pressurization chamber plus the cracking pressure of the check valve, that is, the pressure in the firing chamber is It was higher than the pressure. Therefore, in order to reliably return the hammer to top dead center, it is necessary to increase the return force of the drive device, and thus when reliably returning to top dead center and firing next time,
The main piston is advanced, but because the pressure in the firing chamber is high, the hammer is also advanced and held in that position until it balances with the acting force due to the pressure in the back pressure chamber. As a result, the distance is reduced and the speed efficiency is lowered.
【０００５】そこで、ハンマーの保持力を向上する一つ
の手段として、ハンマーの凸部表面の面積（図７ではそ
の直径Ｄ１で示す）と、従ピストンの表面面積（図７で
はその直径Ｄ２で示す）との差を大きくすることによ
り、吊り軸が前進すると背圧室に即座に発射室の作用力
より高い作用力が保持できるので、理論上ハンマーの保
持力を向上することができる。しかし実際には、仮に直
径Ｄ２をそのままで直径Ｄ１を小さくしてその差を大き
く取ろうとすると、ハンマーに通気孔を設けているた
め、直径Ｄ１を小さくすることができないものである。
逆に直径Ｄ１の寸法をそのままにして、直径Ｄ２を大き
くすることは構造上可能であるが、加速のエネルギー効
率が減少されハンマーの打撃面積を減少する結果を招く
ものである。Therefore, as one means for improving the holding power of the hammer, the surface area of the convex portion of the hammer (shown by its diameter D1 in FIG. 7) and the surface area of the slave piston (shown by its diameter D2 in FIG. 7). By increasing the difference between the force of the hammer and the force of the firing shaft, it is possible to immediately hold a higher acting force than the acting force of the firing chamber in the back pressure chamber when the suspension shaft advances, so that theoretically, the holding force of the hammer can be improved. However, in reality, if the diameter D1 is left as it is and the diameter D1 is reduced to obtain a large difference, the diameter D1 cannot be reduced because the hammer has the vent holes.
On the contrary, it is structurally possible to increase the diameter D2 while keeping the diameter D1 as it is, but the energy efficiency of acceleration is reduced and the hammer striking area is reduced.
【０００６】本発明は以上の問題を解決することにあ
り、ハンマーの上死点へ至った時に生じる発射室内の圧
力が加圧室の圧力より低下して、ハンマーの保持力を向
上し、ハンマーの速度効率を高め、復動時間を短かくし
サイクルタイムを短縮することができることを目的とし
て提供するものである。The present invention is to solve the above problems. The pressure in the firing chamber, which occurs when the hammer reaches the top dead center, is lower than the pressure in the pressurizing chamber, so that the holding force of the hammer is improved. It is provided for the purpose of improving the speed efficiency, shortening the return time and shortening the cycle time.
【０００７】[0007]
【課題を解決するための手段】そこで本発明の概要は、
ハンマーが復動して生じる発射室の空気を大気に放出し
て、ハンマーの保持力を向上する手段−１，−２，
−３、あるいはハンマーの凸部表面積を縮小してハン
マーの保持力を向上する手段で解決することにある。The outline of the present invention is as follows.
Means for improving the holding power of the hammer by releasing the air in the firing chamber, which is generated when the hammer moves back, to the atmosphere-1, -2,
-3, or a means for improving the holding power of the hammer by reducing the surface area of the convex portion of the hammer.
【０００８】−１の手段は、前記従来のハンマー装置
において、チェック弁に代えて、発射室に大気へ通じる
通孔を内鍔に寄せて設けていることを特徴とする。The means -1 is characterized in that, in the conventional hammer device, instead of the check valve, the firing chamber is provided with a through hole communicating with the atmosphere close to the inner flange.
【０００９】−２の手段は、同様に従来のハンマー装
置において、チェック弁に代えて、駆動装置にそのスト
ロークを制御する検出杆を検出シリンダの流体圧で主ピ
ストンに押圧していると共に検出杆の中間部を大気に露
出して設け、前記発射室の内鍔に寄せて通孔を設け、該
通孔と検出シリンダとをチェック弁を介して連結すると
共に、検出杆にその上死点で検出シリンダより前記大気
に露出する中間部に明けた排出孔間に通じる内孔を設け
ていることを特徴とする。In the same manner as in the conventional hammer device, the means (-2) replaces the check valve in the conventional hammer device by pressing the detection rod for controlling the stroke of the drive device against the main piston by the fluid pressure of the detection cylinder and detecting rod. Is exposed to the atmosphere, a through hole is provided close to the inner collar of the firing chamber, the through hole and the detection cylinder are connected via a check valve, and the detection rod is provided with its top dead center. It is characterized in that an inner hole communicating between the discharge holes opened at an intermediate portion exposed from the detection cylinder to the atmosphere is provided.
【００１０】−３の手段は、同様に従来のハンマー装
置において、チェック弁に代えて、ハンマーが外周面に
おける下死点側先端部にハンマー室内周面に当接するハ
ンマー先端シールを設け、該シールより上死点側に環状
溝を設け、環状溝と発射室の内鍔に寄せて設けた通孔と
を連結すると共に、環状溝にハンマー室のハンマーで仕
切られた空洞室に通じる凹排溝を設けていることを特徴
とする。In the same manner as the conventional hammer device, the means of -3 replaces the check valve with a hammer tip seal for contacting the inner peripheral surface of the hammer chamber with the hammer at the bottom dead center side tip portion of the outer peripheral surface. An annular groove is provided closer to the top dead center side to connect the annular groove with a through hole provided closer to the inner collar of the firing chamber, and a concave drainage groove that communicates with a hollow chamber partitioned by a hammer in the hammer chamber in the annular groove. Is provided.
【００１１】の手段は、同様に従来のハンマー装置に
おいて、通気孔に代えて、吊り軸内に加圧室と背圧室と
に通じる連通孔を設けていることを特徴とする。Similarly, in the conventional hammer device, the means of (1) is characterized in that a communication hole communicating with the pressure chamber and the back pressure chamber is provided in the suspension shaft instead of the ventilation hole.
【００１２】更に、この種のハンマー装置は土木機械と
しても使用され、筒体のハンマー側に土砂が入らないよ
うに、筒体の先端に受圧板をシールを介して設けられる
が、その場合、ハンマー室は密閉されハンマーの発射時
にその空洞室の空気が圧縮され、ハンマーの発射力を減
衰することになる。従って前記手段−１，−２，
−３に加えて、筒体内の主ピストンよりその上死点側の
大気に通じている空室とハンマーの下死点側の空洞室と
を、吊り軸内に設けた抜き孔を通じて連結することが好
ましい。Further, this type of hammer device is also used as a civil engineering machine, and a pressure receiving plate is provided at the tip of the cylinder through a seal so that earth and sand do not enter the hammer side of the cylinder, but in that case, The hammer chamber is closed, and when the hammer is fired, the air in the hollow chamber is compressed, so that the hammer firing force is attenuated. Therefore, the means-1, -2,
In addition to -3, the empty chamber communicating with the atmosphere on the top dead center side of the main piston in the cylinder body and the cavity chamber on the bottom dead center side of the hammer are connected through a hole provided in the suspension shaft. Is preferred.
【００１３】[0013]
【作用】前記手段−１，−２，−３によれば、発
射室の容積が縮小するに従ってその内圧が大気に放出さ
れ、加圧室の圧力とほぼ同様ないしそれ以下となり、ハ
ンマーの保持力が大きく向上される。According to the above-mentioned means-1, -2, -3, as the volume of the firing chamber is reduced, the internal pressure of the firing chamber is released to the atmosphere and becomes almost the same as or lower than the pressure of the pressurizing chamber. Is greatly improved.
【００１４】また手段によれば、ハンマーに通気孔を
明ける必要がなくなり、ハンマーの凸部表面積を必要最
小限にまで縮小することができ、その結果、凸部表面積
と従ピストンの表面積との差を大きくでき、この手段に
よってもハンマーの保持力が大きく向上できるようにな
る。Further, according to the means, it is not necessary to open a vent hole in the hammer, and the surface area of the convex portion of the hammer can be reduced to the necessary minimum. As a result, the difference between the surface area of the convex portion and the surface area of the slave piston can be reduced. The holding force of the hammer can be greatly improved by this means as well.
【００１５】[0015]
【実施例】本発明を具体的に図１から図６に示している
が、その構造の大半は従来のハンマー装置と同様である
から、図７の従来装置と同部分を同符号で記しその構造
の説明を省略し、本発明の手段について説明する。但
し、図７に示す装置も同様であるが、筒体１の先端に受
圧板１８を封止シール１９を介して取付け、パイプなど
を土中に埋め込む土木用のものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is specifically shown in FIGS. 1 to 6, but since most of the structure is similar to that of a conventional hammer device, the same parts as those of the conventional device of FIG. Description of the structure will be omitted, and the means of the present invention will be described. However, although the device shown in FIG. 7 is also the same, it is for civil engineering in which the pressure receiving plate 18 is attached to the tip of the tubular body 1 via a sealing seal 19 and a pipe or the like is embedded in the soil.
【００１６】図１に示す手段は、筒体１に発射室１６に
通じる通孔２０を内鍔２に寄せて明け、一方、ハンマー
９と受圧板１８間の空洞室２１が密閉室となっているの
で、従ピストン８から吊り軸７内を通じ筒体１内の主ピ
ストン４より上死点側の空室２２に開口する抜き孔２３
を明けたもので、空室２２は大気に通じているものであ
る。しかし、空洞室２１が開放された状態で使用する場
合には、上記抜き孔２３は不用である。また、筒体１内
に内蔵するチェック弁１７も不用である。In the means shown in FIG. 1, a through hole 20 communicating with the firing chamber 16 is opened in the cylindrical body 1 by advancing it to the inner collar 2, while a hollow chamber 21 between the hammer 9 and the pressure receiving plate 18 becomes a closed chamber. Therefore, the vent hole 23 that opens from the secondary piston 8 through the suspension shaft 7 to the empty chamber 22 on the top dead center side of the main piston 4 in the tubular body 1
The vacant chamber 22 is open to the atmosphere. However, when the cavity chamber 21 is used in an open state, the above-mentioned hole 23 is unnecessary. Further, the check valve 17 built in the cylinder 1 is also unnecessary.
【００１７】以上の構造によっても本発明の目的作用を
達成することができるが、発射時にもその圧縮空気が僅
かに大気へ放出しエネルギー損失するため、ハンマー９
が上死点へ復動し発射室１６の空気が圧縮され始める時
点より、その空気を大気へ放出できるように構成するこ
とが望ましい。The above-described structure can also achieve the object operation of the present invention, but the compressed air is slightly released to the atmosphere at the time of firing, and energy is lost, so that the hammer 9 is used.
It is desirable that the air be released to the atmosphere from the time when the air returns to the top dead center and the air in the firing chamber 16 starts to be compressed.
【００１８】その手段は図１から図３に示しているよう
に、駆動装置５は単動形シリンダでエアータンク２４を
備え、その行程を位置検出部２５で制御するようになっ
ているが、この位置検出部２５は、駆動装置５のヘッド
２６内に検出部シール２７で形成し且つエアータンク２
４の空気圧で作動する検出シリンダ２８を設け、該シリ
ンダ２８内より筒体１の主ピストン４に当接する検出杆
２９を備え、その中間部は大気に露出し、該中間部に制
御部３０を設けたものである。As shown in FIGS. 1 to 3, the driving means 5 is a single-acting cylinder provided with an air tank 24, and its stroke is controlled by a position detecting section 25. The position detection unit 25 is formed by a detection unit seal 27 in the head 26 of the drive unit 5 and the air tank 2
4 is provided with a detection cylinder 28 that operates by air pressure, and a detection rod 29 that comes into contact with the main piston 4 of the tubular body 1 from inside the cylinder 28 is provided. The middle portion thereof is exposed to the atmosphere, and the control portion 30 is provided at the middle portion. It is provided.
【００１９】そこで上記検出シリンダ２８の中間部に設
けた連結孔３１と、前記発射室１６に通じる通孔２０と
をチェック弁３２を介在した配管３３によって連結し、
検出杆２９にその上死点位置で連結孔３１に対向して明
けた受け口３４と、大気に露出する部分に位置して明け
た放出口３５とを結ぶ内孔３６を設けるものである。し
かも、前記検出部シール２７と受け口３４間の距離Ｓ１
が、ハンマー９の凸部１０に有する凸部シール１１の取
付け距離Ｓ０より小となるように配設するのが最も好ま
しい。Therefore, the connection hole 31 provided in the middle portion of the detection cylinder 28 and the through hole 20 communicating with the firing chamber 16 are connected by a pipe 33 with a check valve 32 interposed therebetween.
The detection rod 29 is provided with an inner hole 36 that connects the receiving opening 34 facing the connecting hole 31 at the top dead center position and the opening 35 that is open at the portion exposed to the atmosphere. Moreover, the distance S1 between the detection unit seal 27 and the receiving port 34
However, it is most preferable to dispose the protrusion seal 11 on the protrusion 10 of the hammer 9 so as to be smaller than the mounting distance S0.
【００２０】従って、ハンマー９が発射した以後の上死
点へ復動する際、発射室１６と加圧室３が連通している
から発射室１６内の空気は加圧室３へ流入するが、ハン
マー９の凸部１０が内鍔２内に挿入しその凸部シール１
１部分が内鍔２の内周面に圧接する時点より、発射室１
６と加圧室３とが分離され、発射室１６の空気が圧縮を
始めることになるが、その際検出杆２９の受け口３４が
連結孔３１と対向するから、発射室１６の空気が通孔２
０、配管３３、チェック弁３２、連結孔３１、受け口３
４、内孔３６、放出口３５を通じて大気へ排出するもの
で、この放出により発射室１６内の圧力が加圧室３より
低下し、ハンマー９の保持力が向上し、しかも上死点位
置へ迅速に復帰するものである。Therefore, when the hammer 9 fires and returns to the top dead center, the air in the firing chamber 16 flows into the pressure chamber 3 because the firing chamber 16 and the pressure chamber 3 communicate with each other. , The protrusion 10 of the hammer 9 is inserted into the inner collar 2 and the protrusion seal 1
From the time when one part is pressed against the inner peripheral surface of the inner flange 2, the firing chamber 1
6 and the pressurizing chamber 3 are separated, and the air in the firing chamber 16 starts to be compressed. At that time, since the receiving port 34 of the detection rod 29 faces the connecting hole 31, the air in the firing chamber 16 passes through. Two
0, piping 33, check valve 32, connecting hole 31, receiving port 3
4, the inner hole 36, and the discharge port 35 are discharged to the atmosphere. Due to this discharge, the pressure in the firing chamber 16 is lower than that in the pressurizing chamber 3, the holding force of the hammer 9 is improved, and moreover, to the top dead center position. It is a quick return.
【００２１】図４に示す手段は、発射室１６の空気をハ
ンマー９の下死点側の空洞室２１へ放出するように構成
するもので、ハンマー９の外周面に環状溝３７を設け、
筒体１の内周面に、ハンマー９が上死点位置に在る状態
で環状溝３７より下死点側にハンマー先端シール３８を
設け、またハンマー９が上死点に在る状態で、ハンマー
先端シール３８と環状溝３７間の距離Ｓ２が、凸部シー
ル１１の取付け距離Ｓ０より小となるように配設し、筒
体１の壁内にハンマー９が上死点に位置する状態で、発
射室１６と環状溝３７を連結する排出孔３９を設け、ハ
ンマー９の外周面に環状溝３７と空洞室２１を連結する
凹排溝４０を備えたものである。尚、この場合も、空洞
室２１が密閉室であれば、図４の如く吊り軸７に抜き孔
２３を設ける。The means shown in FIG. 4 is constructed so that the air in the firing chamber 16 is discharged into the cavity chamber 21 on the bottom dead center side of the hammer 9, and an annular groove 37 is provided on the outer peripheral surface of the hammer 9.
On the inner peripheral surface of the tubular body 1, a hammer tip seal 38 is provided on the bottom dead center side of the annular groove 37 with the hammer 9 at the top dead center position, and with the hammer 9 at the top dead center, In a state where the distance S2 between the hammer tip seal 38 and the annular groove 37 is smaller than the mounting distance S0 of the convex seal 11 and the hammer 9 is located at the top dead center in the wall of the cylinder 1. A discharge hole 39 that connects the firing chamber 16 and the annular groove 37 is provided, and a concave discharge groove 40 that connects the annular groove 37 and the cavity chamber 21 is provided on the outer peripheral surface of the hammer 9. Also in this case, if the hollow chamber 21 is a closed chamber, the hanging shaft 7 is provided with a hole 23 as shown in FIG.
【００２２】次ぎに図５と図６に示す手段は、ハンマー
９の凸部１０の表面積（図中直径Ｄ１で示す）と、従ピ
ストン８の表面積（図中直径Ｄ２で示す）との差を大き
くしてハンマー９の保持力を高めようとするもので、吊
り軸７に加圧室３と背圧室１４とに通じる連通孔４１を
設けたものである。更に、上記構造に加えて、図１ある
いは図４に示す手段を設けても良い。Next, in the means shown in FIGS. 5 and 6, the difference between the surface area of the convex portion 10 of the hammer 9 (shown by the diameter D1 in the drawing) and the surface area of the slave piston 8 (shown by the diameter D2 in the drawing) is calculated. It is intended to increase the holding force of the hammer 9 by increasing the size, and the suspension shaft 7 is provided with a communication hole 41 communicating with the pressurizing chamber 3 and the back pressure chamber 14. Further, in addition to the above structure, the means shown in FIG. 1 or 4 may be provided.
【００２３】以上のように、吊り軸７に連通孔４１を設
けたものであるから、従来のハンマー９に設けていた通
気孔１２が不用となり、従って凸部１０の直径Ｄ１を小
さくして従ピストン８の直径Ｄ２との差を大きく取れる
ことができ、これによりハンマー９の保持力を向上する
ことができる。As described above, since the communication hole 41 is provided in the suspension shaft 7, the ventilation hole 12 provided in the conventional hammer 9 is unnecessary, and accordingly, the diameter D1 of the convex portion 10 is made small. A large difference from the diameter D2 of the piston 8 can be taken, and thus the holding force of the hammer 9 can be improved.
【００２４】尚、前記各手段において、加圧室３に空気
供給源４２から空気を補給するようになっている。In each of the above means, the pressure chamber 3 is supplied with air from the air supply source 42.
【００２５】[0025]
【発明の効果】本発明によるハンマー装置によれば、加
圧室と分離された発射室の空気を大気へ放出するように
なっているため、ハンマーが上死点位置にまで確実に復
動するものであり、復動する時間が大幅に短縮され、サ
イクルタイムを向上することができる。また次ぎの加圧
時に吊り軸が下死点に向かって前進して、ハンマーに背
圧が加えられたその当初の圧は僅かであっても発射室の
気圧が低いため、ハンマーは殆ど上死点位置に保持さ
れ、発射時にはハンマーの加速距離が大きくなり、大き
な衝撃力を得ることができるようになる。According to the hammer device of the present invention, since the air in the firing chamber separated from the pressurizing chamber is discharged to the atmosphere, the hammer can reliably return to the top dead center position. However, it is possible to greatly reduce the time required for returning and improve the cycle time. When the next pressurization, the suspension shaft advances toward the bottom dead center and the back pressure is applied to the hammer. Even if the initial pressure is small, the pressure in the firing chamber is low, so the hammer almost dead. It is held at a point position, and the acceleration distance of the hammer becomes large at the time of firing, and a large impact force can be obtained.
【００２６】更に、従来装置では発射室と加圧室間に介
在するチェック弁は筒体の壁内に設けられていたが、振
動や砂埃によってその機能に障害を与え易く常に点検す
る必要があったが、本装置によれば、上記従来のチェッ
ク弁が不用となることから、ハンマーを作動する圧を高
圧にも低圧にも調節して使用することができるようにな
る。Further, in the conventional device, the check valve interposed between the firing chamber and the pressurizing chamber was provided in the wall of the cylindrical body, but its function is liable to be impaired by vibration and dust, and it is necessary to constantly inspect it. However, according to the present device, since the above-mentioned conventional check valve is unnecessary, the pressure for operating the hammer can be adjusted to either high pressure or low pressure for use.
【図１】本発明によるハンマー装置の代表的な例を示す
断面図である。FIG. 1 is a sectional view showing a typical example of a hammer device according to the present invention.
【図２】図１のＡ線矢視の断面図である。FIG. 2 is a sectional view taken along the line A of FIG.
【図３】図１のＢ線矢視の断面図である。FIG. 3 is a sectional view taken along the line B of FIG.
【図４】本発明によるハンマー装置の類例を示す断面図
である。FIG. 4 is a sectional view showing an example of a hammer device according to the present invention.
【図５】本発明によるハンマー装置の更に他の類例を示
す断面図である。FIG. 5 is a sectional view showing still another example of the hammer device according to the present invention.
【図６】図５のＣ線矢視の断面図である。6 is a sectional view taken along the line C of FIG.
【図７】従来のハンマー装置を示す断面図である。FIG. 7 is a cross-sectional view showing a conventional hammer device.
１ 筒体 ２ 内鍔 ３ 加圧室 ４ 主ピストン ５ 駆動装置 ６ ハンマー室 ７ 吊り軸 ８ 従ピストン ９ ハンマー １０ 凸部 １１ 凸部シール １２ 通気孔 １３ 挿入孔 １４ 背圧室 １５ 凹溝 １６ 発射室 ２０ 通孔 ２１ 空洞室 ２２ 空室 ２３ 抜き孔 ２９ 検出杆 ３１ 連結孔 ３４ 受け口 ３５ 放出口 ３７ 環状溝 ３８ ハンマー先
端シール ３９ 排出孔 ４０ 凹排溝 ４１ 連通孔DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Inner collar 3 Pressurizing chamber 4 Main piston 5 Drive device 6 Hammer chamber 7 Lifting shaft 8 Slave piston 9 Hammer 10 Convex part 11 Convex part seal 12 Vent hole 13 Insertion hole 14 Back pressure chamber 15 Recessed groove 16 Firing chamber 20 through hole 21 hollow chamber 22 empty chamber 23 vent hole 29 detection rod 31 connecting hole 34 receiving port 35 discharge port 37 annular groove 38 hammer tip seal 39 discharge hole 40 concave discharge groove 41 communication hole
Claims (5)
（３）とハンマー室（６）とに分離し、加圧室（３）に
は駆動装置（５）により可動する主ピストン（４）を備
え、ハンマー室（６）内にはその内周壁に沿って摺動す
ると共に上死点で内鍔（２）の内周面に凸部シール（１
１）を介して突入するハンマー（９）を備え、主ピスト
ン（４）とハンマー（９）内に設けた従ピストン（８）
とを吊り軸（７）で連結し、従ピストン（８）とハンマ
ー（９）の対向面間にハンマー（９）に明けた通気孔
（１２）で加圧室（３）と通じる背圧室（１４）を設
け、吊り軸（７）の中間部に設けた凹溝（１５）よりハ
ンマー（９）に設けた挿入孔（１３）を通じて加圧室
（３）の圧力を受け込む発射室（１６）を備えているハ
ンマー装置において、 発射室（１６）に大気へ通じる通孔（２０）を内鍔
（２）に寄せて設けていることを特徴とするハンマー装
置。1. A cylinder (1) is divided into a pressure chamber (3) and a hammer chamber (6) by an inner collar (2), and the pressure chamber (3) is movable by a drive unit (5). A main piston (4) for sliding along the inner peripheral wall of the hammer chamber (6), and a convex seal (1) on the inner peripheral surface of the inner collar (2) at the top dead center.
1) equipped with a hammer (9) plunging through, and a secondary piston (8) provided in the primary piston (4) and the hammer (9)
And a suspension shaft (7), and a back pressure chamber communicating with the pressure chamber (3) through a vent hole (12) opened in the hammer (9) between the opposing surfaces of the secondary piston (8) and the hammer (9). (14) is provided, and the firing chamber (3) for receiving the pressure of the pressurizing chamber (3) through the insertion hole (13) provided in the hammer (9) from the groove (15) provided in the middle portion of the suspension shaft (7). A hammer device provided with 16), characterized in that a through hole (20) communicating with the atmosphere is provided in the firing chamber (16) close to the inner collar (2).
（３）とハンマー室（６）とに分離し、加圧室（３）に
は駆動装置（５）により可動する主ピストン（４）を備
え、ハンマー室（６）内にはその内周壁に沿って摺動す
ると共に上死点で内鍔（２）の内周面に凸部シール（１
１）を介して突入するハンマー（９）を備え、主ピスト
ン（４）とハンマー（９）内に設けた従ピストン（８）
とを吊り軸（７）で連結し、従ピストン（８）とハンマ
ー（９）の対向面間にハンマー（９）に明けた通気孔
（１２）で加圧室（３）と通じる背圧室（１４）を設
け、吊り軸（７）の中間部に設けた凹溝（１５）よりハ
ンマー（９）に設けた挿入孔（１３）を通じて加圧室
（３）の圧力を受け込む発射室（１６）を備えているハ
ンマー装置において、 前記駆動装置（５）の行程を制御する検出杆（２９）を
検出シリンダ（２８）の流体圧で主ピストン（４）に押
圧していると共に検出杆（２９）の中間部を大気に露出
して設け、前記発射室（１６）の内鍔（２）に寄せて通
孔（２０）を設け、該通孔（２０）と検出シリンダ（２
８）とをチェック弁（３２）を介して連結すると共に、
検出杆（２９）にその上死点で検出シリンダ（２８）よ
り前記大気に露出する中間部に明けた排出孔（３９）間
に通じる内孔（３６）を設けていることを特徴とするハ
ンマー装置。2. A cylindrical body (1) is divided into a pressure chamber (3) and a hammer chamber (6) by an inner collar (2), and the pressure chamber (3) is movable by a drive unit (5). A main piston (4) for sliding along the inner peripheral wall of the hammer chamber (6), and a convex seal (1) on the inner peripheral surface of the inner collar (2) at the top dead center.
1) equipped with a hammer (9) plunging through, and a secondary piston (8) provided in the primary piston (4) and the hammer (9)
And a suspension shaft (7), and a back pressure chamber communicating with the pressure chamber (3) through a vent hole (12) opened in the hammer (9) between the opposing surfaces of the secondary piston (8) and the hammer (9). (14) is provided, and the firing chamber (3) for receiving the pressure of the pressurizing chamber (3) through the insertion hole (13) provided in the hammer (9) from the groove (15) provided in the middle portion of the suspension shaft (7). 16) In the hammer device, the detection rod (29) for controlling the stroke of the drive device (5) is pressed against the main piston (4) by the fluid pressure of the detection cylinder (28) and the detection rod (29) is pressed. 29) is provided with an intermediate portion exposed to the atmosphere, and a through hole (20) is provided close to the inner flange (2) of the firing chamber (16), and the through hole (20) and the detection cylinder (2) are provided.
8) and is connected via a check valve (32),
A hammer characterized in that the detection rod (29) is provided with an inner hole (36) communicating with a discharge hole (39) opened at an intermediate portion exposed from the detection cylinder (28) to the atmosphere at its top dead center. apparatus.
（３）とハンマー室（６）とに分離し、加圧室（３）に
は駆動装置（５）により可動する主ピストン（４）を備
え、ハンマー室（６）内にはその内周壁に沿って摺動す
ると共に上死点で内鍔（２）の内周面に凸部シール（１
１）を介して突入するハンマー（９）を備え、主ピスト
ン（４）とハンマー（９）内に設けた従ピストン（８）
とを吊り軸（７）で連結し、従ピストン（８）とハンマ
ー（９）の対向面間にハンマー（９）に明けた通気孔
（１２）で加圧室（３）と通じる背圧室（１４）を設
け、吊り軸（７）の中間部に設けた凹溝（１５）よりハ
ンマー（９）に設けた挿入孔（１３）を通じて加圧室
（３）の圧力を受け込む発射室（１６）を備えているハ
ンマー装置において、 ハンマー室（６）内周面にハンマー（９）外周面の下死
点側先端部に当接するハンマー先端シール（３８）を設
け、該シール（３８）より上死点側におけるハンマー
（９）外周面に環状溝（３７）を設け、環状溝（３７）
と発射室（１６）の内鍔（２）に寄せて設けた通孔（２
０）とを連結すると共に、環状溝（３７）にハンマー室
（６）のハンマー（９）で仕切られた空洞室（２１）に
通じる凹排溝（４０）を設けていることを特徴とするハ
ンマー装置。3. A cylinder (1) is divided into a pressure chamber (3) and a hammer chamber (6) by an inner collar (2), and the pressure chamber (3) is movable by a drive unit (5). A main piston (4) for sliding along the inner peripheral wall of the hammer chamber (6), and a convex seal (1) on the inner peripheral surface of the inner collar (2) at the top dead center.
1) equipped with a hammer (9) plunging through, and a secondary piston (8) provided in the primary piston (4) and the hammer (9)
And a suspension shaft (7), and a back pressure chamber communicating with the pressure chamber (3) through a vent hole (12) opened in the hammer (9) between the opposing surfaces of the secondary piston (8) and the hammer (9). (14) is provided, and the firing chamber (3) for receiving the pressure of the pressurizing chamber (3) through the insertion hole (13) provided in the hammer (9) from the groove (15) provided in the middle portion of the suspension shaft (7). In a hammer device provided with 16), a hammer tip seal (38) is provided on the inner peripheral surface of the hammer chamber (6) that abuts the bottom dead center side tip of the hammer (9) outer peripheral surface. An annular groove (37) is provided on the outer peripheral surface of the hammer (9) on the top dead center side, and the annular groove (37) is provided.
And a through hole (2) provided close to the inner collar (2) of the firing chamber (16)
0), and a concave drainage groove (40) communicating with the hollow chamber (21) partitioned by the hammer (9) of the hammer chamber (6) is provided in the annular groove (37). Hammer device.
の上死点側の大気に通じている空室（２２）とハンマー
（９）の下死点側の空洞室（２１）とを、吊り軸（７）
内に設けた抜き孔（２３）を通じて連結していることを
特徴とする請求項１，２または３に記載のハンマー装
置。4. A hollow chamber (21) on the bottom dead center side of the hammer (9) and a chamber (22) communicating with the atmosphere on the top dead center side of the main piston (4) in the tubular body (1). And the suspension shaft (7)
Hammer device according to claim 1, 2 or 3, characterized in that they are connected through a hole (23) provided inside.
（３）とハンマー室（６）とに分離し、加圧室（３）に
は駆動装置（５）により可動する主ピストン（４）を備
え、ハンマー室（６）内にはその内周壁に沿って摺動す
ると共に上死点で内鍔（２）の内周面に凸部シール（１
１）を介して突入するハンマー（９）を備え、主ピスト
ン（４）とハンマー（９）内に設けた従ピストン（８）
とを吊り軸（７）で連結し、従ピストン（８）とハンマ
ー（９）の対向面間にハンマー（９）に明けた通気孔
（１２）で加圧室（３）と通じる背圧室（１４）を設
け、吊り軸（７）の中間部に設けた凹溝（１５）よりハ
ンマー（９）に設けた挿入孔（１３）を通じて加圧室
（３）の圧力を受け込む発射室（１６）を備えているハ
ンマー装置において、 吊り軸（７）内に加圧室（３）と背圧室（１４）とに通
じる連通孔（４１）を設けていることを特徴とするハン
マー装置。5. A cylinder (1) is divided into a pressure chamber (3) and a hammer chamber (6) by an inner collar (2), and the pressure chamber (3) is movable by a drive unit (5). A main piston (4) for sliding along the inner peripheral wall of the hammer chamber (6), and a convex seal (1) on the inner peripheral surface of the inner collar (2) at the top dead center.
1) equipped with a hammer (9) plunging through, and a secondary piston (8) provided in the primary piston (4) and the hammer (9)
And a suspension shaft (7), and a back pressure chamber communicating with the pressure chamber (3) through a vent hole (12) opened in the hammer (9) between the opposing surfaces of the secondary piston (8) and the hammer (9). (14) is provided, and the firing chamber (3) for receiving the pressure of the pressurizing chamber (3) through the insertion hole (13) provided in the hammer (9) from the groove (15) provided in the middle portion of the suspension shaft (7). A hammer device provided with 16), characterized in that a communication hole (41) communicating with the pressurizing chamber (3) and the back pressure chamber (14) is provided in the suspension shaft (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9199993A JP2675247B2 (en) | 1993-03-26 | 1993-03-26 | Hammer equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9199993A JP2675247B2 (en) | 1993-03-26 | 1993-03-26 | Hammer equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06280262A JPH06280262A (en) | 1994-10-04 |
| JP2675247B2 true JP2675247B2 (en) | 1997-11-12 |
Family
ID=14042122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9199993A Expired - Fee Related JP2675247B2 (en) | 1993-03-26 | 1993-03-26 | Hammer equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2675247B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100932662B1 (en) * | 2008-10-17 | 2009-12-21 | 권태운 | Pile driving hammer |
| KR101326161B1 (en) * | 2012-05-16 | 2013-11-06 | 우주기계 주식회사 | A pile driver |
| CN103215954B (en) * | 2013-03-29 | 2015-01-28 | 郭强 | Reinforcement type sealed cylinder type hydraulic pile hammer |
-
1993
- 1993-03-26 JP JP9199993A patent/JP2675247B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06280262A (en) | 1994-10-04 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |