JPH074713B2 - Construction machinery used to repair snow-melting nozzles - Google Patents
Construction machinery used to repair snow-melting nozzlesInfo
- Publication number
- JPH074713B2 JPH074713B2 JP7911088A JP7911088A JPH074713B2 JP H074713 B2 JPH074713 B2 JP H074713B2 JP 7911088 A JP7911088 A JP 7911088A JP 7911088 A JP7911088 A JP 7911088A JP H074713 B2 JPH074713 B2 JP H074713B2
- Authority
- JP
- Japan
- Prior art keywords
- base
- snow
- screw
- electric drill
- handle
- 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
- Road Repair (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は舖装道路等の舖装面に埋設されている消雪ノズ
ルの補修に用いる工事用機械に関するものである。Description: TECHNICAL FIELD The present invention relates to a construction machine used for repairing a snow-melting nozzle buried in a snow-covered surface of a snow-covered road or the like.
〔従来の技術〕および〔発明が解決しようとする課題〕 従来、この種消雪ノズルの補修は消雪ノズル埋設用コン
クリートをコンクリート破砕機やコンクリートカツター
等を用いて削つて旧消雪ノズル全体を取り除き、代りに
新しい消雪ノズルを取付け、周囲をコンクリートで固定
する全体入れ替え方式によりなしていた。[Prior Art] and [Problems to be Solved by the Invention] Conventionally, the repair of this type of snow-melting nozzle is performed by scraping concrete for burying the snow-melting nozzle with a concrete crusher or a concrete cutter, etc. The snow removal nozzle was replaced and a new snow-melting nozzle was installed instead, and the surrounding area was fixed with concrete.
しかし、当該全体入れ替え方式による場合には、コンク
リートを毀す時の騒音および振動が大きく、またコンク
リートが固まる迄に長い養生時間を必要とし、更に養生
中は交通規制を必要とする。特に冬期に行なわれる補修
はコンクリートが冷温下では固化し難いので、養生の時
間も交通の規制時間も長くなる不都合があるのみならず
路側には雪があるために工事中は道路巾が長時間に亘り
狭くなることもあつて危険度が極めて高い等の欠陥があ
つた。However, in the case of the whole replacement method, noise and vibration at the time of hardening concrete are large, a long curing time is required until the concrete is hardened, and traffic regulation is required during the curing. In particular, repairs that are performed in the winter are difficult to solidify in cold temperatures, so the curing time and traffic regulation time will be longer, and there is snow on the roadside, so the road width will be long during construction. However, there was a defect that the risk was extremely high because it became narrower.
そこで、本発明の発明者は周囲のコンクリートを毀さず
に補修できる後述するような工法を発明した。Therefore, the inventor of the present invention has invented a construction method, which will be described later, that can repair the surrounding concrete without damaging it.
本発明は上記工法に用いて有効な、即ち上記欠陥を充分
に解消することに役立つ新規の工事用機械を提供するこ
とを目的とするものである。It is an object of the present invention to provide a new construction machine which is effective for use in the above-mentioned construction method, that is, which helps to sufficiently eliminate the above-mentioned defects.
上記目的を達成するために本発明消雪ノズルの補修に用
いる工事用機械は、傾き調節用のネジ棒をもつ磁性金属
製台盤と、電磁石入り座台の上に回転止めネジ付き回転
台を、この回転台の上に機台を、この機台の前面にハン
ドル操作のスライドヘツドを介して下向きに電気ドリル
本体を、この電気ドリル本体の主軸の先端にシヤンクホ
ルダを夫々設けられた本体と、を有し本体を台盤上の電
磁石の吸着力により起立状態に固定するようにされ、ま
たシヤンクホルダーに円筒の外周および底面に刃をもつ
エンドミル、下穴明け用ドリルおよびタツプを任意に交
換して取付けるようにされたものであり、 更に、オモリ体を台盤の上に載せ置く構成とし、これに
より台盤の軽量化を可能とし、仍つて当該台盤の取扱を
容易にするようにされたものである。In order to achieve the above object, the construction machine used for repairing the snow-melting nozzle of the present invention comprises a magnetic metal base having a screw rod for tilt adjustment, and a rotary base with a rotation-stop screw on a base with an electromagnet. , A machine stand on the turntable, an electric drill body on the front of the machine stand via a slide head operated by a handle, and a main body provided with a shank holder at the tip of the main shaft of the electric drill body, respectively. The main body is fixed in an upright state by the adsorption force of the electromagnet on the base, and the shank holder has an end mill with blades on the outer and bottom surfaces of the cylinder, a drill for drilling holes and taps. In addition, the weight body is placed on the base, which enables the weight of the base to be reduced, and thus the base to be handled easily. With something is there.
〔実施例〕および〔作用〕 次いで、本発明の実施例を図面に依拠して説明するに、 先ず、磁性金属板製台盤（１）の前側の両隅個所および
後側の中央個所に上下に貫通するネジ孔（図示せず）を
設け、これ等前側両ネジ孔、後側ネジ孔に着地脚用ネジ
棒（２）（２）′（３）を其の上下両端が台盤（１）の
上下両方に貫出した状態として螺入し、これ等地脚用ネ
ジ棒（２）（２）′（３）の上端にハンドル（４）を着
脱自在とすると共に台盤（１）の後縁の両側に搬送用浮
輪（５）（５）′を取付けることにより架台（６）を構
成し、 またこれとは別個に取手（７）付きオモリ体（８）の一
対を構成し、 更に、これ等とは別個に電磁石（図示せず）入り座台
（９）の上に回転止めネジ（10）付き回転台（11）を、
この回転台（11）の上に機台（12）を、この機台（12）
の前面にハンドル（13）およびラツク機構（図示せず）
により上下に摺動するスライドヘツド（14）を、このス
ライドヘツド（14）に取付金具（15）および取付ネジ
（16）（16）′を介して下向きに電気ドリル本体（17）
を、この電気ドリル本体（16）の主軸（18）の下端にシ
ヤンクホルダ（19）を夫々設け、当該シヤンクホルダ
（18）には円筒の外周および底面に刃（20）（20）′を
もつエンドミル（21）、下穴明け用ドリル（22）および
タツプ（23）を任意に交換して取付けるようにすると共
に上記機台（12）に於てスライドヘツド（14）の横に同
スライドヘツド（14）の上下動量計測用スライドゲージ
（24）を上下移動可能として設けることにより本体（2
5）を構成し、 仍つて、架台（６）を所定の場所にセツトしこの架台
（６）に於ける台盤（１）の上に本体（25）およびオモ
リ体（８）を載置し且つ座台（９）に於ける電磁石の吸
者により本体（25）を台盤（１）上に起立状態に固定し
使用する工事用機械（26）を構成する。台盤（１）の上
面と座台（９）の下面とに当該座台（９）を前後方向に
のみ移動できるように規制する案内レールを設ける場合
もある。[Embodiment] and [Operation] Next, an embodiment of the present invention will be described with reference to the drawings. First, the magnetic metal plate base (1) is vertically moved to both front corners and rear center. A screw hole (not shown) is formed to penetrate through these holes, and the landing leg screw rods (2) (2) '(3) are attached to the front screw holes and the rear screw holes. ) Is screwed into the upper and lower sides of the base plate, and the handle (4) is detachably attached to the upper ends of the ground rod screw rods (2) (2) '(3) and the base plate (1) is attached. A pedestal (6) is constructed by attaching the transport floating wheels (5), (5) 'on both sides of the trailing edge, and a pair of weight bodies (8) with a handle (7) is constructed separately from this. Separately from these, a rotary base (11) with a rotation stop screw (10) is mounted on a base (9) containing an electromagnet (not shown),
The machine base (12) is placed on the turntable (11), and the machine base (12)
(13) and rack mechanism (not shown) on the front of the
The slide head (14) that slides up and down by the electric drill main body (17) is attached to the slide head (14) downward via the mounting bracket (15) and the mounting screws (16) (16) '.
A shank holder (19) is provided at the lower end of the main shaft (18) of the electric drill body (16), and the shank holder (18) has an end mill (blade (20) (20) 'on the outer circumference and bottom surface of the cylinder. 21), the drill (22) for preparing a hole and the tap (23) can be arbitrarily exchanged and mounted, and the slide head (14) can be mounted next to the slide head (14) on the machine base (12). A slide gauge (24) for measuring the vertical movement of the main body (2
5) is constructed, and the pedestal (6) is set at a predetermined place, and the main body (25) and the weight body (8) are placed on the pedestal (1) on the pedestal (6). Moreover, a construction machine (26) is constructed in which the main body (25) is fixed to the stand (1) in an upright state by the sucker of the electromagnet in the seat (9) and used. Guide rails may be provided on the upper surface of the base (1) and the lower surface of the seat (9) to restrict the seat (9) so that the seat (9) can move only in the front-rear direction.
また、これとは別個に上端の開口縁のまわりに鍔状の蓋
部（28）を一体に連設され且つ当該蓋部（28）の外周面
にＯリング（27）を嵌着された上側管体（29）の下方部
の内周面に第２雌ネジ（30）を核設して当該第２雌ネジ
（30）に、上下両端部の外周に第１雄ネジ（31）および
第２雄ネジ（32）をまた上端部の内周に第３雌ネジ（3
3）を夫々有する下側管体（34）を第２雌ネジ（30）と
第１雄ネジ（31）との螺着によつて連結すると共に下側
管体（34）の中間高さ個所に内外に連通する導水用固定
孔（35）を開設し、またこれとは別個に上面が閉塞され
下面が開放された円筒状を呈し且つ上半分の外周面に第
３雄ネジ（37）が核設され上面にドライバー溝（38）を
有する制水コマ（39）を構成し、この制水コマ（39）を
上記下側起管体（34）の中に上方より挿入して第３雌ネ
ジ（33）と第３雄ネジ（37）を螺合させ、当該制水コマ
（39）の周壁部に両端が内外に開口する導水用可動孔
（40）を開設することによつて新バルブ等内蔵物（41）
を構成する。Separately from this, an upper side in which a brim-shaped lid portion (28) is continuously provided integrally around the opening edge at the upper end and an O-ring (27) is fitted to the outer peripheral surface of the lid portion (28). A second female screw (30) is provided on the inner peripheral surface of the lower portion of the tubular body (29) so that the second female screw (30) has the first male screw (31) and the first male screw (31) 2 Male screw (32) again on the inner circumference of the upper end and 3rd female screw (3
The lower tube (34) each having 3) is connected by screwing the second female screw (30) and the first male screw (31), and the middle height of the lower tube (34). Has a water-conducting fixing hole (35) communicating with the inside and the outside, and separately from this, it has a cylindrical shape with the upper surface closed and the lower surface opened, and the third male screw (37) is provided on the outer peripheral surface of the upper half. A water control piece (39) having a driver groove (38) on the upper surface of the core is constructed, and the water control piece (39) is inserted into the lower tubular body (34) from above to form a third female. The screw (33) and the third male screw (37) are screwed together, and a new water introducing hole (40) is formed in the peripheral wall of the water control piece (39), both ends of which open inward and outward. Built-in etc. (41)
Make up.
斯くして、工事用機械（26）および新バルブ等内蔵物
（41）を現場に持つて行き、事用機械（26）を既設の消
雪ノズル（43）の埋設された路面上に置いてオモリ体
（８）を載せ、次いでハンドル（４）を着替け乍ら用い
て着地脚用ネジ棒（２）（２）′（３）を廻し、仍つ
て、台盤（１）の水平向きを調節したのち台盤（１）上
に於ける座台（９）の位置を決める操作、回転止めネジ
（10）を弛めて回転台（11）を廻す操作、回転止めネジ
（10）を締め戻す操作、ハンドル（13）により電気ドリ
ル本体（17）の高さを調節する操作等をなしてシヤンク
ホルダ（19）の中心と既設消雪ノズル（43）の中心を合
せ、このシヤンクホルダ（19）にエンドミル（21）を取
付け、当該エンドミル（21）の底面刃（20）′が既設消
雪ノズル（43）の所定の個所に当たるかどうかをハンド
ル（13）にて電気ドリル本体（17）を下降させることに
より確かめ、もしこの時にエンドミル（21）の底面刃
（20）′が既設消雪ノズル（43）に正確に当つていない
場合には座台（９）の位置、回転台（11）の向き、ひい
ては台盤（１）の位置を補正し、斯くしてエンドミル
（21）が正確に位置づけされたのちに電磁石に通電して
座台（９）を架台（６）に吸着し且つ回転止めネジ（1
0）の締付を確認する。In this way, the construction machine (26) and the built-in components (41) such as new valves are brought to the site, and the construction machine (26) is placed on the road surface where the existing snow removal nozzle (43) is buried. Place the weight body (8), and then use the handle (4) to change the landing leg screw rods (2) (2) '(3) and rotate the base plate (1) horizontally. After adjusting the position, the operation to determine the position of the seat (9) on the base (1), the operation to loosen the rotation stop screw (10) and turn the rotation base (11), the rotation stop screw (10) The shank holder (19) is aligned by aligning the center of the shank holder (19) with the center of the existing snow-removing nozzle (43) by re-tightening, adjusting the height of the electric drill body (17) with the handle (13), etc. Attach the end mill (21) to the end mill, and the bottom blade (20) 'of the end mill (21) hits a predetermined location on the existing snow removal nozzle (43). Check whether or not it is by lowering the electric drill body (17) with the handle (13), and at this time, the bottom blade (20) 'of the end mill (21) is accurately hitting the existing snow removal nozzle (43). If not, correct the position of the pedestal (9), the orientation of the rotary base (11), and by extension the position of the base (1), and then energize the electromagnet after the end mill (21) is accurately positioned. Then, the base (9) is attached to the base (6) and the rotation stop screw (1
Check the tightening of 0).
次いで、ハンドル（13）を操作してエンドミル（21）の
底面刃（20）′を既設消雪ノズル（43）の天壁（44）の
上面に軽く当て、この当つている状態に於てスライドゲ
ージ（24）に上下動操作を加えてそのゼロ点を基準点
（図示せず）に合せ、然るのちハンドル（13）を戻して
エンドミル（21）の底面刃（20）′を既設消雪ノズル
（43）の天壁（44）より離し、この離れ状態に於て電気
ドリル本体（17）を回転状態とすると共にハンドル（1
3）を操作してエンドミル（21）を下降させ、仍つて既
設消雪ノズル（44）の天壁（44）の中央個所を噴水口
（45）を残した状態で円形に切断する。この切断が充分
になされたかどうかは上記ゼロ合せをなしたスライドゲ
ージ（24）の目盛でスライドヘツド（14）の下降量を見
乍ら切断の深さが所定寸法に達したことを知る手段によ
り確認する。Then, operate the handle (13) to lightly touch the bottom blade (20) 'of the end mill (21) to the upper surface of the top wall (44) of the existing snow removal nozzle (43), and slide in this contacting state. The gauge (24) is moved up and down to adjust its zero point to the reference point (not shown), and then the handle (13) is returned to the bottom blade (20) 'of the end mill (21) to remove the existing snow. Separate from the top wall (44) of the nozzle (43), and in this separated state, rotate the electric drill body (17) and handle (1
3) is operated to lower the end mill (21), and then the center part of the ceiling wall (44) of the existing snow-melting nozzle (44) is cut into a circle with the fountain port (45) left. Whether or not this cutting has been completed is done by means of knowing that the cutting depth has reached the predetermined dimension by looking at the amount of lowering of the slide head (14) on the scale of the slide gauge (24) which has been adjusted to zero. Check.
然るのち、電気ドリル本体（17）を停止させて上方位置
に戻し、エンドミル（21）をシヤンクホルダ（19）より
外し、上記円形切断により囲繞された部分（46）および
旧バルブ等内蔵物（47）を特殊プライヤーにより取去す
る。After that, the electric drill body (17) is stopped and returned to the upper position, the end mill (21) is removed from the shank holder (19), and the portion surrounded by the circular cutting (46) and the internal components such as the old valve (47). ) With special pliers.
更に、シヤンクホルダ（19）に下孔明け用ドリル（22）
を取付け、この下孔明け用ドリル（22）を回転および下
降させて既設消雪ノズル（44）のケース（48）に於ける
底面に下孔（49）を穿設する。Further, the shank holder (19) has a drill (22) for drilling a pilot hole.
The drill (22) for drilling a pilot hole is rotated and lowered to form a pilot hole (49) in the bottom surface of the case (48) of the existing snow-melting nozzle (44).
次いで、下孔（49）にタツプ（23）を用いて第１雌ネジ
（50）を刻設する。この刻設作業はタツプ（23）を片手
回しの逆転止メ用爪車（図示せず）内蔵型レンチ（51）
を利用して回し且つレンチ（51）に予め設けられた短い
丸棒ピン（52）をシヤンクホルダ（19）に回転自在に嵌
着して頭ブレを防止してなす。Then, the tap (23) is used to engrave the first female screw (50) in the pilot hole (49). This engraving work is a wrench (51) with a built-in wrench (not shown) for the reverse rotation stop mechanism that rotates the tap (23) with one hand.
A short round bar pin (52) provided in advance on the wrench (51) is rotatably fitted to the shank holder (19) to prevent head movement.
このようにして既設消雪ノズル（43）の方への加工を完
了する。In this way, the processing for the existing snow removal nozzle (43) is completed.
次いで、旧バルブ等内蔵物（47）の取去によつて形成さ
れた空間（53）内に上記新バルブ等内蔵物（41）を挿入
して第２雄ネジ（32）を第１雌ネジ（50）に螺合させ、
当該螺合により蓋部（28）の外周面と上記円形切断にて
形成された孔の切縁面（54）とを対向させ且つこれ等対
向両面間をＯリング（27）により気密にし、然るのち必
要に応じて、既設消雪ノズル（43）のケース（48）の上
面と新バルブ内蔵物（41）の上面とをサンダーにより同
じ高さにけずり仕上げ、仍つて工事を完了するものであ
る。Next, the new valve internal component (41) is inserted into the space (53) formed by removing the old valve internal component (47), and the second male screw (32) is attached to the first female screw. Screw it into (50),
By this screwing, the outer peripheral surface of the lid portion (28) and the cut edge surface (54) of the hole formed by the circular cutting are opposed to each other, and an O-ring (27) is used to make the opposing surfaces airtight. After that, if necessary, the upper surface of the case (48) of the existing snow-melting nozzle (43) and the upper surface of the new valve built-in object (41) may be sanded to the same height to complete the work. is there.
本発明は上記のような構成であるので、上記工法に用い
て有効で上記欠陥の解消に大いに役立つものであつて、
所期の目的を完全に達成する優れた効果を奏するもので
ある。Since the present invention has the above-mentioned structure, it is effective for use in the above-mentioned construction method and is very useful for eliminating the above-mentioned defects.
It has an excellent effect of completely achieving the intended purpose.
第１図は本発明の実施例を示すもので全体の平面図、第
２図は同じく側面図、第３図は本発明工事用機械を用い
てなす工法のフローチヤートである。 （１）……台盤、（２）（２）′（３）……着地脚用ネ
ジ棒、（４）……ハンドル、（５）（５）′……浮輪、
（６）……架台、（７）……取手、（８）……オモリ
体、（９）……座台、（10）……回転止めネジ、（11）
……回転台、（12）……機台、（13）……ハンドル、
（14）……スライドヘツド、（15）……取付金具、（1
6）（16）′……取付ネジ、（17）……電気ドリル本
体、（18）……主軸、（19）……シヤンクホルダ、（2
0）（20）′……刃、（21）……エンドミル、（22）…
…ドリル、（23）……タツプ、（24）……スライドゲー
ジ、（25）……本体、（26）……工事用機械、（27）…
…Ｏリング、（28）……蓋部、（29）……上側管体、
（30）……第２雌ネジ、（31）……第１雄ネジ、（32）
……第２雄ネジ、（33）……第３雌ネジ、（34）……下
側管体、（35）……固定孔、（37）……第３雄ネジ、
（38）……ドライバー溝、（39）……制水コマ、（40）
……可動孔、（41）……新バルブ内蔵物、（43）……既
設消雪ノズル、（44）……天壁、（45）……噴水口、
（46）……部分、（47）……旧バルブ内蔵物、（48）…
…ケース、（49）……下孔、（50）……第１雌ネジ、
（51）……レンチ、（53）……空間。FIG. 1 shows an embodiment of the present invention, an overall plan view, FIG. 2 is a side view of the same, and FIG. 3 is a flow chart of a construction method using a construction machine of the present invention. (1) ... base, (2) (2) '(3) ... landing leg screw rod, (4) ... handle, (5) (5)' ... floating wheel,
(6) ...... Stand, (7) ...... Handle, (8) ...... Weight body, (9) ...... Base, (10) ...... Rotation stop screw, (11)
...... Rotary base, (12) …… Machine base, (13) …… Handle,
(14) …… Slide head, (15) …… Mounting bracket, (1
6) (16) ′ …… Mounting screw, (17) …… Electric drill body, (18) …… Spindle, (19) …… Shank holder, (2
0) (20) '…… blade, (21) …… end mill, (22)…
… Drill, (23) …… Tap, (24) …… Slide gauge, (25) …… Main body, (26) …… Construction machine, (27)…
… O-ring, (28) …… Lid, (29) …… Upper tube,
(30) …… Second female screw, (31) …… First male screw, (32)
...... Second male screw, (33) …… Third female screw, (34) …… Lower tube, (35) …… Fixing hole, (37) …… Third male screw,
(38) …… Driver groove, (39) …… Water control piece, (40)
…… Movable hole, (41) …… New valve built-in object, (43) …… Existing snow-melting nozzle, (44) …… Top wall, (45) …… Fountain,
(46) …… Part, (47) …… Old built-in valve, (48)…
… Case, (49) …… Prepared hole, (50) …… First female screw,
(51) …… Wrench, (53) …… Space.
Claims (2)
盤と、 電磁石入り座台の上に回転止めネジ付き回転台を、この
回転台の上に機台を、この機台の前面にハンドル操作の
スライドヘツドを介して下向きに電気ドリル本体を、こ
の電気ドリル本体主軸の先端にシヤンクホルダを夫々設
けられた本体と、 を有し、本体を台盤上に電磁石の吸着力により起立状態
に固定するようにされ、またシヤンクホルダに円筒の外
周および底面に刃をもつエンドミル、下穴明け用ドリル
およびタツプを任意に交換して取付けるようにされたこ
とを特徴とする消雪ノズルの補修に用いる工事用機械。1. A magnetic metal product base having a screw rod for tilt adjustment, a rotary base with a rotation stop screw on a base with an electromagnet, a machine base on the rotary base, and a front surface of the machine base. The electric drill body downwards through the handle-operated slide head, and the main body in which a shank holder is provided at the tip of the main shaft of the electric drill body, and the body is erected on the bed by the attraction force of the electromagnet. For repairing the snow-melting nozzle, which is characterized in that the end mill with blades on the outer and bottom surfaces of the cylinder, the drill for drilling holes and the taps are arbitrarily replaced and attached to the shank holder. Construction machinery used.
特徴とする請求項１記載の消雪ノズルの補修に用いる工
事用機械。2. A construction machine used for repairing a snow-melting nozzle according to claim 1, further comprising a weight body placed on a base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7911088A JPH074713B2 (en) | 1988-03-31 | 1988-03-31 | Construction machinery used to repair snow-melting nozzles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7911088A JPH074713B2 (en) | 1988-03-31 | 1988-03-31 | Construction machinery used to repair snow-melting nozzles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01252329A JPH01252329A (en) | 1989-10-09 |
| JPH074713B2 true JPH074713B2 (en) | 1995-01-25 |
Family
ID=13680764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7911088A Expired - Fee Related JPH074713B2 (en) | 1988-03-31 | 1988-03-31 | Construction machinery used to repair snow-melting nozzles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074713B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601685B (en) * | 2012-02-23 | 2013-12-11 | 河北联合大学 | Automatic drilling and tapping device for lathe |
| CN105855885B (en) * | 2016-05-31 | 2017-09-26 | 慈溪市天行电器有限公司 | A kind of burner tips automatic punch |
-
1988
- 1988-03-31 JP JP7911088A patent/JPH074713B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01252329A (en) | 1989-10-09 |
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