JPH057093B2 - - Google Patents
Info
- Publication number
- JPH057093B2 JPH057093B2 JP17199985A JP17199985A JPH057093B2 JP H057093 B2 JPH057093 B2 JP H057093B2 JP 17199985 A JP17199985 A JP 17199985A JP 17199985 A JP17199985 A JP 17199985A JP H057093 B2 JPH057093 B2 JP H057093B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- tool
- tightening
- hydraulic
- relief valve
- 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 - Lifetime
Links
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/146—Clip clamping hand tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
- B25B7/126—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears with fluid drive
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Safety Valves (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は油圧式締付け工具に関し、一層詳細
には被処理材の種類に応じて締付け圧の限界を適
宜設定できるようにリリーフバルブの開放限界を
調節可能にして工具および油圧に必要以上の負荷
をかけないようにした油圧式締付け工具に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hydraulic tightening tool, and more specifically, the opening limit of a relief valve so that the limit of tightening pressure can be appropriately set according to the type of material to be treated. This invention relates to a hydraulic tightening tool that is adjustable so as not to place an unnecessary load on the tool and hydraulic pressure.
（従来技術）
油圧式締付け工具として、例えば手動油圧式ワ
イヤー接続工具にあつては、接続すべき２本のワ
イヤーの端部を当接してスリーブで包み、ワイヤ
ーが脱離しないようにスリーブの外側から締付け
部材を用い油圧作動によつて挾圧変形させるもの
がある。(Prior art) As a hydraulic tightening tool, for example, in the case of a manual hydraulic wire connecting tool, the ends of two wires to be connected are brought into contact and wrapped in a sleeve, and the outside of the sleeve is placed so that the wires do not come off. There is also a method that uses a tightening member and is deformed by clamping pressure by hydraulic operation.
この場合に、ワイヤーの太さ、スリーブの肉
厚、材質の種類等によつて条件に対応する各別の
締付け部材を工具に取付け、それぞれ必要締付け
圧も異なる。 In this case, different tightening members are attached to the tool depending on the conditions such as the thickness of the wire, the wall thickness of the sleeve, the type of material, etc., and the required tightening pressure is different for each.
締付けを取替えて工具を汎用するのは各種工具
を揃えるのはコスト的にもかかるし、高所作業が
多いため、多数の工具を用意する煩を避けるもの
である。 Changing the tightening and using a general-purpose tool avoids the hassle of preparing a large number of tools, since it is costly to prepare various tools and often involves work at high places.
油圧系にはリリーフバルブを設け、油圧が一定
圧力に達すると油圧を開放するように最大限界圧
力を設定する。この最大限界圧力は、最も大きな
圧力を必要とする締付け部材の圧力値を若干越え
たところに設定する。 The hydraulic system is equipped with a relief valve, and the maximum limit pressure is set so that the hydraulic pressure is released when it reaches a certain pressure. This maximum limit pressure is set at a point slightly exceeding the pressure value of the tightening member that requires the greatest pressure.
このリリーフバルブを工具本体の油圧系に臨む
ように、工具本体に対して別体に着脱自在に設け
ることによつて、工具本体と異なる材質を用いる
ことができ、加工精度を向上させることができる
等の効果が得られる考案については、本発明の発
明者が考案し実用新案登録出願した（実願昭52−
112747号、実開昭54−39698号「手動油圧式工具
に装填使用するリリーフバルブ」）。 By providing this relief valve separately and removably from the tool body so that it faces the hydraulic system of the tool body, it is possible to use a material different from that of the tool body, and machining accuracy can be improved. The inventor of the present invention devised and applied for utility model registration for a device that achieves the following effects (Utility Model Application No. 1972-
No. 112747, Utility Model Application No. 54-39698 "Relief valve for use in manual hydraulic tools").
しかるに、このように油圧系の最大限界圧力を
設定した場合には、例えば細いワイヤーやワイヤ
ーおよびスリーブの材質が軟かい場合には締付け
は最大限界圧力よりはるかに小さい圧力で足りる
にもかかわらず、締付け部材が当接して、最大限
界圧力にまで達してリリーフバルブが開放されハ
ンドルの負荷が無くなることにより確実に締付け
が完了したことを確認できるまでハンドル操作を
行わなければならない。 However, when the maximum limit pressure of the hydraulic system is set in this way, for example, if the material of the thin wire or wire and sleeve is soft, a pressure much lower than the maximum limit pressure is sufficient for tightening. The handle must be operated until it can be confirmed that the tightening member is in contact and the maximum limit pressure is reached, the relief valve is opened, and the load on the handle is removed, thereby confirming that tightening has been reliably completed.
これは次第に負荷が大きくなつてハンドルを必
要以上の労力を費やして操作しなければならず、
電柱の上やバケツトの中など高所での作業にあつ
ては危険が大きい。 This gradually increases the load and requires more effort than necessary to operate the handle.
Working at heights such as on telephone poles or inside buckets is very dangerous.
また油圧経路の圧力が使用のたびに昇圧される
ため、各バルブシートの損傷が早く、工具のメン
テナンスの期間が短くなる。 Additionally, because the pressure in the hydraulic path is increased each time it is used, each valve seat is damaged more quickly and the tool maintenance period is shortened.
（技術的課題）
従つてこの発明の目的は、上記難点を解消し、
被処理材の状態に応じた最小限の仕事量で締付け
作業ができ、締付け工具全体を軽量で耐久性のあ
るものにすることができる、締付け部材が当接す
るまで油圧駆動の締付け部材が被処理材を変形挾
圧する工具において、締付け部材が当接した後昇
圧して一定圧に達すると油圧を開放するリリーフ
バルブを工具本体の材質により硬くかつ工具本体
に対して着脱自在に設けると共に、上記油圧を開
放する一定圧を可変的に設定できるようにリリー
フバルブのスプリング圧を外部から調節可能に設
けけたことを特徴とする油圧式締付け工具を提供
するにある。(Technical Problem) Therefore, the purpose of this invention is to solve the above-mentioned difficulties,
The tightening work can be done with the minimum amount of work depending on the condition of the material to be processed, and the entire tightening tool can be made lightweight and durable. In a tool that deforms and presses a material, a relief valve is provided that is hard depending on the material of the tool body and that releases the hydraulic pressure when it reaches a certain pressure after the tightening member comes into contact with it and is detachable from the tool body. To provide a hydraulic tightening tool characterized in that the spring pressure of a relief valve can be adjusted from the outside so that a constant pressure for releasing the relief valve can be variably set.
（実施例）
以下この発明の１実施例につき図面を参照して
詳細に説明する。(Embodiment) Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図は、本件発明に係るワイヤ接続用油圧式
締付け工具の全体図である。 FIG. 1 is an overall view of a hydraulic tightening tool for wire connection according to the present invention.
１２は柄杆で、本件の柄杆１２の内部に油圧タ
ンク２４が構成されている。 12 is a handle rod, and a hydraulic tank 24 is configured inside the handle rod 12 of the present invention.
１４は油圧機能部で、加圧ハンドル１６の上下
動操作により締付け部材１８ａ，１８ｂのうち可
動する締付け部材１８ｂを圧油により押圧する。 Reference numeral 14 denotes a hydraulic function section, which presses the movable tightening member 18b of the tightening members 18a and 18b with pressure oil when the pressure handle 16 is moved up and down.
第２図において、２０はラム、２２はラム室
で、加圧ハンドル１６を開閉操作することによつ
てラム２０がポンプ動作し、その吸引工程で柄杆
１２の油タンク２４の油がラム室２２に導かれ、
この油が上記ラム２０の圧縮工程で油圧として働
き、この圧油が通路（図示せず）を経て、可動締
付け部材１８ｂの作動シリンダ２６に流入する。 In FIG. 2, 20 is a ram, and 22 is a ram chamber. The ram 20 is pumped by opening and closing the pressure handle 16, and in the suction process, oil in the oil tank 24 of the handle rod 12 is pumped into the ram chamber. Guided by 22,
This oil acts as hydraulic pressure during the compression process of the ram 20, and this pressure oil flows into the actuating cylinder 26 of the movable clamping member 18b through a passage (not shown).
２８は該シリンダ２６内の可動ピストンで、該
ピストン２８の先端に可動締付け部材１８ｂが設
けられ該ピストン２８に押圧されて対向する固定
締付け部材１８ａに進出し、それにより両締付け
部材１８ａ，１８ｂ間に介在される電線などを挾
圧する。 Reference numeral 28 denotes a movable piston within the cylinder 26. A movable clamping member 18b is provided at the tip of the piston 28, and is pressed by the piston 28 and advances to the opposing fixed clamping member 18a, thereby tightening the space between the clamping members 18a and 18b. Clamps electrical wires, etc. that are interposed between.
３０はリリーフバルブユニツトで、作動シリン
ダ２６と油タンク２４を連通する通路３２に介在
しており、作動シリンダ２６内の内圧が設定値以
上になつたときにリリーフバルブユニツト３０が
作動して油は油タンク２４に返し戻される。 Reference numeral 30 denotes a relief valve unit, which is interposed in a passage 32 that communicates the operating cylinder 26 and the oil tank 24. When the internal pressure in the operating cylinder 26 exceeds a set value, the relief valve unit 30 is operated to drain the oil. The oil is returned to the oil tank 24.
第３図はリリーフバルブユニツト３０の構造説
明図で、３４は弁筐で細長筒状をしており、下端
部に弁座３６が設けられ、弁座３６の中心には油
流入用の弁孔３８が穿設され通路３２に連通して
いる。 FIG. 3 is a structural explanatory diagram of the relief valve unit 30, where 34 is a valve housing having an elongated cylindrical shape, a valve seat 36 is provided at the lower end, and a valve hole for oil inflow is provided at the center of the valve seat 36. 38 is bored and communicates with the passage 32.
４０は弁杆で、下端は先細テーパ部４２が設け
られて、この先細テーパ部４２は弁孔３８にスプ
リング４４によつて嵌合付勢し、かつ弁筐３４の
側壁に上記弁杆４０の移動によりその周側面つま
りステム部分４６によつて構成され、従つて前述
した逃げ通路３２の油は弁孔３８を通じ弁杆４０
を押上げ弁筐３４内に流入すると共に上記弁杆４
０の押上げによつて開かれた排出用孔４８から油
タンク２４内に帰戻されることは勿論である。 Reference numeral 40 designates a valve rod, and a tapered portion 42 is provided at the lower end of the valve rod. Due to the movement, the oil in the above-mentioned escape passage 32, which is constituted by the circumferential side, that is, the stem portion 46, flows through the valve hole 38 to the valve rod 40.
flows into the valve housing 34 and the valve rod 4.
Of course, the oil is returned into the oil tank 24 through the discharge hole 48 opened by pushing up the oil.
５０は圧力調整ノブで、中心軸５２が弁筐３４
の上部内壁を螺合しており、ノブ５０を回転する
こときにより中心軸５２が進退し、スプリング４
４の押圧力を調整する。 50 is a pressure adjustment knob, and the center axis 52 is the valve housing 34.
When the knob 50 is rotated, the central shaft 52 moves forward and backward, and the spring 4
Adjust the pressing force in step 4.
５４はクリツクピンで圧力調整ノブ５０を定位
置で固定する。 A click pin 54 fixes the pressure adjustment knob 50 in a fixed position.
（作 用）
以上のように構成されているので、締付けるワ
イヤーの状態に応じて圧力調整ノブ５０を回し
て、リリーフバルブ３０を一定の圧力限界に設定
すると、加圧ハンドル１６を開閉操作することに
よつて作動シリンダ２６内に圧油が流入してい
き、可動ピストン２８が可動締付け部材１８ｂを
押圧し固定締付け部材１８ａとの間で接合したワ
イヤーの外側からスリーブを締め付けていき、締
め付けが完了して両締付け部材１８ａ，１８ｂが
接合して、油圧が急速に昇圧しはじめると、リリ
ーフバルブ３０が開放して油圧が降下し、加圧ハ
ンドル１６の負荷が急速に軟らかくなり、締付け
作業が完了したことがわかり、作業を終了でき
る。(Function) With the above structure, when the pressure adjustment knob 50 is turned to set the relief valve 30 to a certain pressure limit according to the state of the wire to be tightened, the pressure handle 16 can be opened and closed. As a result, pressure oil flows into the operating cylinder 26, and the movable piston 28 presses the movable tightening member 18b, tightening the sleeve from the outside of the wire connected to the fixed tightening member 18a, and the tightening is completed. When both the tightening members 18a and 18b are connected and the oil pressure starts to rise rapidly, the relief valve 30 opens and the oil pressure falls, the load on the pressure handle 16 is quickly softened, and the tightening work is completed. You can finish the work by knowing what you have done.
（効 果）
このように本件発明に係る油圧式締付け工具に
よれば、リリーフバルブの圧力限界を適宜設定す
ることができるので、ワイヤーやスリーブの状態
に応じて必要量最小限度の圧力で締付け操作を行
い、操作のたびに工具について設定された固有の
最大限界圧力まで昇圧する必要がない。(Effect) As described above, according to the hydraulic tightening tool of the present invention, the pressure limit of the relief valve can be set appropriately, so tightening operations can be performed with the minimum amount of pressure required depending on the condition of the wire or sleeve. and eliminates the need to increase the pressure to a specific maximum limit pressure set for the tool every time it is operated.
したがつて、加圧ハンドルの負荷が小さくて済
み、そのため高所作業における安全性が確保でき
るほか、各バルブトに無理な力が加わる頻度が極
めて少なくなり、耐久性が増し、したがつて工具
のメンテナンスの期間も延長され、工具自体の強
度も低く設定できるため、計量化、低コスト化が
実現でき、さらにバルブステム部は別体加工のた
め充分な硬度をとることができ、それでも寿命が
きた場合には容易に取りはずして交換できるなど
の著効を奏する。 Therefore, the load on the pressure handle is small, which not only ensures safety when working at heights, but also greatly reduces the frequency of applying excessive force to each valve button, increasing durability and improving the tool's durability. The maintenance period is extended, and the strength of the tool itself can be set to a lower level, making it easier to measure and reduce costs.Furthermore, since the valve stem is machined separately, it can be sufficiently hardened, and the tool life can still be extended. In some cases, it can be easily removed and replaced.
以上本発明は、ワイヤー接続工具を実施例に挙
げて説明したが、必しも実施例に限定されるもの
ではなく、発明の精神を逸脱しない範囲で各種工
具に応用され、改変されるべきは勿論のことであ
る。 Although the present invention has been described above using a wire connection tool as an example, it is not necessarily limited to the example, and may be applied to various tools and modified without departing from the spirit of the invention. Of course.
第１図は本件発明に係る実施例ワイヤー接続用
油圧式締付け工具の全体説明図、第２図は上記工
具の機構の説明断面図、第３図はリリーフバルブ
ユニツト３０の機構説明断面図である。
１０…油圧式締付け工具、１２…柄杆、１４…
油圧機能部、１６…加圧ハンドル、１８ａ，１８
ｂ…締付け部材、２０…ラム、２２…ラム室、２
４…油タンク、２６…作動シリンダ、２８…可動
ピストン、３０…リリーフバルブユニツト、３２
…通路、３４…弁筐、３６…弁座、３８…弁孔、
４０…弁杆、４２…テーパ部、４４…スプリン
グ、４６…ステム部、４８…油排出用孔、５０…
ノブ、５２…中心軸、５４…クリツクピン。
FIG. 1 is an overall explanatory view of a hydraulic tightening tool for wire connection according to an embodiment of the present invention, FIG. 2 is an explanatory sectional view of the mechanism of the tool, and FIG. 3 is an explanatory sectional view of the mechanism of the relief valve unit 30. . 10... Hydraulic tightening tool, 12... Handle rod, 14...
Hydraulic function part, 16... Pressure handle, 18a, 18
b... Tightening member, 20... Ram, 22... Ram chamber, 2
4... Oil tank, 26... Operating cylinder, 28... Movable piston, 30... Relief valve unit, 32
...Passage, 34...Valve housing, 36...Valve seat, 38...Valve hole,
40...Valve rod, 42...Tapered part, 44...Spring, 46...Stem part, 48...Oil discharge hole, 50...
Knob, 52...center shaft, 54...click pin.
Claims (1)
部材が被処理材を変形挾圧する工具において、締
付け部材が当接した後昇圧して一定圧に達すると
油圧を開放するリリーフバルブを工具本体の材質
により硬くかつ工具本体に対して着脱自在に設け
ると共に、上記油圧を開放する一定圧を可変的に
設定できるようにリリーフバルブのスプリング圧
を外部から調節可能に設けたことを特徴とする油
圧式締付け工具。1. In a tool in which a hydraulically driven clamping member deforms and presses the workpiece until the clamping member makes contact, a relief valve that increases pressure after the clamping member makes contact and releases the hydraulic pressure when a certain pressure is reached is installed depending on the material of the tool body. A hydraulic tightening tool that is hard and detachable from the tool body, and is provided with a spring pressure of a relief valve that can be adjusted from the outside so that the constant pressure for releasing the hydraulic pressure can be variably set. .
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17199985A JPS6233024A (en) | 1985-08-05 | 1985-08-05 | Hydraulic fastener |
| FR8517867A FR2585893B1 (en) | 1985-08-05 | 1985-12-03 | HYDRAULIC COMPRESSION TOOL |
| AU60829/86A AU583141B2 (en) | 1985-08-05 | 1986-08-04 | An hydraulic compression tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17199985A JPS6233024A (en) | 1985-08-05 | 1985-08-05 | Hydraulic fastener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6233024A JPS6233024A (en) | 1987-02-13 |
| JPH057093B2 true JPH057093B2 (en) | 1993-01-28 |
Family
ID=15933646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17199985A Granted JPS6233024A (en) | 1985-08-05 | 1985-08-05 | Hydraulic fastener |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS6233024A (en) |
| AU (1) | AU583141B2 (en) |
| FR (1) | FR2585893B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0444270Y2 (en) * | 1988-09-09 | 1992-10-19 | ||
| US4947672A (en) * | 1989-04-03 | 1990-08-14 | Burndy Corporation | Hydraulic compression tool having an improved relief and release valve |
| DE29906511U1 (en) * | 1998-05-19 | 1999-08-12 | Geberit Technik AG, Jona, St.Gallen | Bending device with hydraulic drive |
| ITBZ20030028A1 (en) * | 2003-05-19 | 2004-11-20 | Intercable Srl | HYDRAULIC TOOL FOR COMPRESSION AND CUTTING. |
| DE102010026665A1 (en) * | 2010-07-09 | 2012-05-03 | Dennis Jacobs | Devices and methods for sealing pipe / hose leaks |
| CN105437101A (en) * | 2015-11-30 | 2016-03-30 | 周伟萌 | Multifunctional hydraulic forceps |
| CN106058604B (en) * | 2016-06-21 | 2018-07-20 | 国网黑龙江省电力有限公司黑河供电公司 | A kind of pressure-adjustable electric hydraulic pincers for electric power first-aid |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS628144Y2 (en) * | 1977-08-22 | 1987-02-25 | ||
| CA1212528A (en) * | 1982-02-08 | 1986-10-14 | Teledyne Penn-Union | Compression tool |
-
1985
- 1985-08-05 JP JP17199985A patent/JPS6233024A/en active Granted
- 1985-12-03 FR FR8517867A patent/FR2585893B1/en not_active Expired - Lifetime
-
1986
- 1986-08-04 AU AU60829/86A patent/AU583141B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU6082986A (en) | 1987-02-12 |
| JPS6233024A (en) | 1987-02-13 |
| FR2585893A1 (en) | 1987-02-06 |
| FR2585893B1 (en) | 1990-04-20 |
| AU583141B2 (en) | 1989-04-20 |
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