JP2015030657A

JP2015030657A - Crucible lifter

Info

Publication number: JP2015030657A
Application number: JP2013163703A
Authority: JP
Inventors: 増田　哲也; Tetsuya Masuda; 哲也増田; 佳生亀山; Yoshio Kameyama
Original assignee: Daido Steel Co Ltd
Current assignee: Daido Steel Co Ltd
Priority date: 2013-08-07
Filing date: 2013-08-07
Publication date: 2015-02-16

Abstract

PROBLEM TO BE SOLVED: To provide a crucible lifter that is located compactly at a periphery of a crucible and can securely lift the crucible.SOLUTION: A crucible lifter includes: a plurality of support plates 2 which are entered into a melting furnace from above at at least three places in a peripheral direction through a gap between an outer periphery of a crucible L and an opposed inner periphery of the melting furnace; a connection body 1 which connects respective upper ends of the support plates 2 and has a lifting lock part 13; a lock piece 3 which is made to move toward an outer periphery of a bottom part of the crucible L gradually reduced in diameter downward from a state in which the lock piece is provided at a lower end part of the support plate 2 and housed in the plate; and an operation member 4 which moves the lock piece 3 back and forward from an upper-end direction of the support plate 2.

Description

本発明は坩堝吊上げ具に関し、狭いスペースで簡易かつ確実に坩堝を吊上げることが可能な坩堝吊上げ具に関する。 The present invention relates to a crucible lifting tool, and more particularly to a crucible lifting tool that can easily and reliably lift a crucible in a narrow space.

坩堝を吊り上げる吊上げ具としては、特許文献１や特許文献２に記載されたものが提案されている（それぞれ従来技術１、従来技術２という）。従来技術１では、吊上げ具の本体を、周方向の一箇所にスリットを設けた環状の弾性板体で構成し、スリット近傍に形成された継ぎ手部を締め付けてスリットを閉じることにより弾性板体の内径を縮小させて、坩堝の外周を挟持させ、この状態で弾性板体を吊り上げている。 As lifting tools for lifting a crucible, those described in Patent Document 1 and Patent Document 2 have been proposed (referred to as Conventional Technology 1 and Conventional Technology 2, respectively). In prior art 1, the main body of the lifting tool is constituted by an annular elastic plate having a slit in one circumferential direction, and a joint formed near the slit is tightened to close the slit. The inner diameter is reduced, the outer periphery of the crucible is held, and the elastic plate is lifted in this state.

また、従来技術２では、坩堝の開口縁外周を囲むように当該外周に向けて開口する環状のリムを設け、当該リム内に挿置した環状のチューブを圧縮空気で膨張させることによって坩堝の外周面を押圧するように把持し、この状態でリムを吊り上げている。 Moreover, in the prior art 2, the outer periphery of the crucible is provided by providing an annular rim that opens toward the outer periphery so as to surround the outer periphery of the opening edge of the crucible, and expanding the annular tube inserted in the rim with compressed air. The surface is gripped so as to press, and the rim is lifted in this state.

特開平９−２０８０２０JP-A-9-208020 特開平１０−２５９０８６JP-A-10-259086

しかし、上記従来の坩堝吊上げ具では、主に坩堝の外周面との摩擦抵抗で坩堝を吊り上げているために吊り上げの確実性に難があるとともに、坩堝の外周に比較的大きな吊上げ具の設置空間を確保する必要があるという問題があった。 However, in the above conventional crucible lifting tool, since the crucible is lifted mainly by the frictional resistance with the outer peripheral surface of the crucible, it is difficult to lift the crucible, and a relatively large lifting tool installation space is provided on the outer periphery of the crucible. There was a problem that it was necessary to ensure.

そこで、本発明はこのような課題を解決するもので、坩堝の周囲にコンパクトに位置させられて坩堝を確実に吊り上げることが可能な坩堝吊上げ具を提供することを目的とする。 Therefore, the present invention solves such problems, and an object of the present invention is to provide a crucible lifting tool that is positioned compactly around the crucible and can reliably lift the crucible.

上記目的を達成するために本第１発明では、坩堝（Ｌ）の外周とこれに対向する溶解炉（Ｍ）の内周との間の間隙（Ｓ）を経て、周方向の少なくとも三箇所で上方から前記溶解炉内へ進入させられる複数の支持板（２）と、これら支持板（２）の各上端を連結する連結体（１）と、前記支持板（２）の下端部に設けられ板内に収容された退入状態から、漸次下方へ縮径する前記坩堝（Ｌ）の底部外周に向けて進出操作させられる係止片（３）と、前記支持板（２）の上端方向から前記係止片（３）を進退操作する操作部材（４）とを具備している。 In order to achieve the above object, in the first invention, at least three locations in the circumferential direction pass through the gap (S) between the outer periphery of the crucible (L) and the inner periphery of the melting furnace (M) facing the crucible (L). A plurality of support plates (2) that are allowed to enter the melting furnace from above, a connecting body (1) that connects the upper ends of these support plates (2), and a lower end portion of the support plate (2). From the retracted state accommodated in the plate, the locking piece (3) that is advanced toward the outer periphery of the bottom of the crucible (L) that gradually decreases in diameter from the upper end direction of the support plate (2) And an operating member (4) for advancing and retracting the locking piece (3).

本第１発明において、係止片を退入状態とした支持板を周方向の少なくとも三箇所で、坩堝の外周とこれに対向する溶解炉の内周との間の間隙を経て溶解炉内へ進入させる。その後、係止片を坩堝の底部外周に向けて進出させ、上記間隙を経て支持板を溶解炉内から引き出すことによって、坩堝を確実に吊り上げることができる。このような構造の坩堝吊上げ具は坩堝の周囲にコンパクトに位置させることができる。 In the first aspect of the present invention, the support plate with the locking piece in the retracted state is inserted into the melting furnace through the gap between the outer periphery of the crucible and the inner periphery of the melting furnace facing the crucible at at least three locations in the circumferential direction. Let it enter. Thereafter, the crucible can be reliably lifted by moving the locking piece toward the outer periphery of the bottom of the crucible and pulling out the support plate from the melting furnace through the gap. The crucible lifting tool having such a structure can be positioned compactly around the crucible.

本第２発明では、前記係止片（３）は下端が軸部材（３２）に結合されて、退入状態から回動進出させられるようになっている。 In the second aspect of the invention, the lower end of the locking piece (3) is coupled to the shaft member (32) so that the locking piece (3) can be rotated and advanced from the retracted state.

本第２発明によれば、係止片の進退作動を簡易に行うことができる。 According to the second aspect of the present invention, the locking piece can be easily moved back and forth.

本第３発明では、前記操作部材（４）は前記支持板（２）の側面に沿った操作棒（４１）を備えており、操作棒（４１）の下端が前記軸部材（３２）の軸心に対し偏心した位置で当該軸部材（３２）に連結されてこれを回動操作するように構成されている。 In the third invention, the operating member (4) includes an operating rod (41) along the side surface of the support plate (2), and the lower end of the operating rod (41) is the shaft of the shaft member (32). The shaft member (32) is connected to the shaft member (32) at a position eccentric with respect to the center, and is rotated.

本第３発明においては、係止片の回動操作を支持板の板厚内でコンパクトかつ簡易に行うことができる。 In the third invention, the rotation operation of the locking piece can be performed compactly and easily within the thickness of the support plate.

上記カッコ内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。 The reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

以上のように、本発明の坩堝吊上げ具によれば、坩堝の周囲にコンパクトに位置させられて坩堝を確実に吊り上げることができる。 As described above, according to the crucible lifting tool of the present invention, the crucible can be reliably lifted by being positioned compactly around the crucible.

坩堝を吊上げた状態の坩堝吊上げ具の全体斜視図である。It is a whole perspective view of the crucible lifting tool of the state which lifted the crucible. 坩堝吊上げ具の平面図である。It is a top view of a crucible lifting tool. 支持板の正面図で、図２のＸ矢視方向から見た図である。It is the front view of a support plate, and is the figure seen from the X arrow direction of FIG. 溶解炉内に挿置された坩堝を坩堝吊上げ具で吊り上げる状態を示す断面図である。It is sectional drawing which shows the state which lifts the crucible inserted in the melting furnace with a crucible lifting tool.

なお、以下に説明する実施形態はあくまで一例であり、本発明の要旨を逸脱しない範囲で当業者が行う種々の設計的改良も本発明の範囲に含まれる。 The embodiment described below is merely an example, and various design improvements made by those skilled in the art without departing from the gist of the present invention are also included in the scope of the present invention.

図１に坩堝吊上げ具で坩堝を吊上げた状態の斜視図を示す。図１において、坩堝吊上げ具は連結体１を備えており、連結体１は図２に示すように中心部１１から水平に三方向へ延びる三つの支腕部１２を有している。連結体１の中心部１１には上方に向けてリング状の吊上げ用係止部１３が設けられて、ホイストチェーン等の下端に設けた吊上げフックＦ（図１）に吊り下げられるようになっている。なお、支腕部１２のうち二つには中間位置に、屈曲して水平外方へ延びるガイド片１４が設けてあり、各ガイド片１４の先端には後述するガイド棒Ｒ（図２）が外方から相対的に進入する切欠き１４１が形成されている。 The perspective view of the state which lifted the crucible with the crucible lifting tool in FIG. 1 is shown. In FIG. 1, the crucible lifting tool includes a connecting body 1, and the connecting body 1 has three support arm portions 12 extending horizontally from a central portion 11 in three directions as shown in FIG. 2. A ring-shaped lifting locking portion 13 is provided at the center portion 11 of the coupling body 1 so as to be hung by a lifting hook F (FIG. 1) provided at the lower end of a hoist chain or the like. Yes. Two of the support arms 12 are provided with guide pieces 14 that are bent and extend horizontally outward at intermediate positions, and a guide rod R (FIG. 2) described later is provided at the tip of each guide piece 14. A notch 141 that relatively enters from the outside is formed.

各支腕部１２の先端には上下方向へ延びる支持板２の上端部がそれぞれ固定されている。支持板２は図３に示すような長板状のもので、上端部が左右一対のボルト２１で上記各支腕部１２に固定されている。支持板２の下端部には中央に矩形の長孔状貫通空間２２が形成されており、当該貫通空間２２内に係止片３が配設されている。 The upper end of the support plate 2 extending in the vertical direction is fixed to the tip of each support arm 12. The support plate 2 is in the shape of a long plate as shown in FIG. 3, and the upper end portion is fixed to each of the support arm portions 12 with a pair of left and right bolts 21. A rectangular slotted through space 22 is formed at the center of the lower end of the support plate 2, and the locking piece 3 is disposed in the through space 22.

係止片３は上記貫通空間２２の断面形状に沿った矩形の細長板体で、係止片３の厚みは支持板２とほぼ同じにしてある。これにより、図３に示すような、係止片３が支持板２の貫通空間２２内に収容された退入状態では、係止片３は支持板２の厚み内に収まっている。 The locking piece 3 is a rectangular elongated plate body along the cross-sectional shape of the through space 22, and the thickness of the locking piece 3 is substantially the same as that of the support plate 2. Thus, as shown in FIG. 3, in the retracted state in which the locking piece 3 is accommodated in the through space 22 of the support plate 2, the locking piece 3 is within the thickness of the support plate 2.

なお、係止片３の先端にはボルト３１が捩じ込まれて、後述する坩堝Ｌ（図１）の外周への当接時の荷重に耐えるようになっている。係止片３の下端部にはこれを幅方向へ貫通して軸部材３２が設けられており、軸部材３２の両端は支持板２の下端両側部に回転可能に支持されている。 In addition, the bolt 31 is screwed into the front-end | tip of the latching piece 3, and it bears the load at the time of contact | abutting to the outer periphery of the crucible L (FIG. 1) mentioned later. A shaft member 32 is provided at the lower end portion of the locking piece 3 so as to penetrate in the width direction, and both ends of the shaft member 32 are rotatably supported on both sides of the lower end of the support plate 2.

支持板２の一方の側面に沿って上下方向へ操作部材４を構成する操作棒４１が配設してあり、操作棒４１の下端は軸部材３２の端面の偏心位置に連結されている。操作棒４１の上端は、支持板２の上端部側面に沿って上下動可能な長尺板状の操作片４２の下端に結合されている。操作片４２には中間位置に棒状ハンドル４３が突設されており、その上方の操作片４２の板面には位置決めピン４４が挿入されている。 An operation bar 41 that constitutes the operation member 4 is disposed in the vertical direction along one side surface of the support plate 2, and the lower end of the operation bar 41 is connected to the eccentric position of the end surface of the shaft member 32. The upper end of the operation rod 41 is coupled to the lower end of a long plate-like operation piece 42 that can move up and down along the side surface of the upper end portion of the support plate 2. A rod-like handle 43 projects from the operation piece 42 at an intermediate position, and a positioning pin 44 is inserted into the plate surface of the operation piece 42 above it.

すなわち、操作片４２の板面に設けられた位置決め孔４２１を、支持板２の上端面に立設したブラケット２３の位置決め孔２３１に一致させて、これら位置決め孔４２１，２３１内に位置決めピン４４を挿入することによって操作片４２が上下方向で位置決めされており、これによって係止片３が図３に示す退入状態に保持されている。ブラケット２３には上記位置決め孔２３１の上方に、さらに位置決め孔２３２が設けられている。なお、支持板２のうち二つには内側面の上下方向中間位置にストッパ部材２４が突設されている（図１）。 That is, the positioning hole 421 provided on the plate surface of the operation piece 42 is made to coincide with the positioning hole 231 of the bracket 23 erected on the upper end surface of the support plate 2, and the positioning pin 44 is inserted into the positioning holes 421 and 231. By inserting, the operation piece 42 is positioned in the vertical direction, and thereby the locking piece 3 is held in the retracted state shown in FIG. A positioning hole 232 is further provided in the bracket 23 above the positioning hole 231. Note that two of the support plates 2 are provided with stopper members 24 projecting at intermediate positions in the vertical direction of the inner surface (FIG. 1).

このような坩堝吊上げ具を使用して図４に示すような溶解炉Ｍ内に置かれた坩堝Ｌを吊り上げる場合には、各支持板２内にそれぞれ係止片３を退入させた状態で、坩堝Ｌの上端外周と溶解炉Ｍの開口縁との間の比較的狭い隙間Ｓ内に、周方向の三箇所にて上方から支持板２を進入させる。この場合の進入は、各ガイド片１４先端の切欠き１４１（図２）に、溶解炉Ｍの上端に立設したガイド棒Ｒの側面を相対的に進入させた状態で、ガイド棒Ｒに沿わせるようにして坩堝吊上げ具全体を下降させることによって、横振れすることなくスムーズに行うことができる。 When lifting the crucible L placed in the melting furnace M as shown in FIG. 4 using such a crucible lifting tool, the locking pieces 3 are retracted into the support plates 2 respectively. In the relatively narrow gap S between the outer periphery of the upper end of the crucible L and the opening edge of the melting furnace M, the support plate 2 is entered from above at three locations in the circumferential direction. The approach in this case is along the guide rod R with the side surface of the guide rod R standing at the upper end of the melting furnace M relatively approaching the notch 141 (FIG. 2) at the tip of each guide piece 14. By lowering the entire crucible lifting tool as described above, it is possible to carry out smoothly without shaking.

各支持板２のストッパ部材２４が坩堝Ｌの上端面に当接するまで（図４の状態）坩堝吊上げ具を下降させた後、位置決めピン４４を位置決め孔２３１（図３）内から抜き出し、ハンドル４３を掴んで操作片４２を引き上げると、操作棒４１を介して軸部材３２が回転させられて、係止片３が図４の矢印で示すように軸部材３２を中心に内方へ回動して傾斜進出させられる。引き上げた操作片４２の位置決め孔４２１を位置決め孔２３２に一致させて再び位置決めピン４４を挿入すると、操作片４２は引き上げられた状態で位置決めされ、この結果、係止片３は進出状態に保持されて坩堝Ｌも安定な状態となる。 After the crucible lifting tool is lowered until the stopper member 24 of each support plate 2 contacts the upper end surface of the crucible L (state of FIG. 4), the positioning pin 44 is extracted from the positioning hole 231 (FIG. 3), and the handle 43 When the operation piece 42 is pulled up by gripping the shaft, the shaft member 32 is rotated via the operation rod 41, and the locking piece 3 is rotated inward about the shaft member 32 as shown by the arrow in FIG. Can be advanced. When the positioning pin 442 is inserted again with the positioning hole 421 of the raised operating piece 42 aligned with the positioning hole 232, the operating piece 42 is positioned in the raised state, and as a result, the locking piece 3 is held in the advanced state. Thus, the crucible L is also in a stable state.

全ての支持板２の係止片３を進出させた状態で、ガイド棒Ｒに沿って坩堝吊上げ具全体を上昇させると、その過程で各支持板２の係止片３が周方向の三箇所で、漸次下方へ縮径する坩堝Ｌの底部外周面に当接して坩堝Ｌを持ち上げる（図１）。このようにして、坩堝Ｌを溶解炉Ｍ内から取り出すことができる。坩堝Ｌを溶解炉Ｍ内へ挿置する場合には、係止片３を進出させて、上記のように坩堝Ｌを支持しつつガイド棒Ｒに沿って坩堝Ｌを溶解炉内へ下降させて坩堝台Ｍ１（図４）上に置き、その後、各係止片３を支持板２内へ退入させて、坩堝吊上げ具のみを上昇させて炉外へ退出させる。 When the entire crucible lifting tool is raised along the guide rod R in the state where the locking pieces 3 of all the supporting plates 2 are advanced, the locking pieces 3 of the supporting plates 2 are moved to three locations in the circumferential direction in the process. Then, the crucible L is lifted by coming into contact with the outer peripheral surface of the bottom of the crucible L that gradually decreases in diameter (FIG. 1). In this way, the crucible L can be taken out from the melting furnace M. When inserting the crucible L into the melting furnace M, the locking piece 3 is advanced, and the crucible L is lowered into the melting furnace along the guide rod R while supporting the crucible L as described above. It puts on the crucible base M1 (FIG. 4), and then, each locking piece 3 is retracted into the support plate 2, and only the crucible lifting tool is raised and retracted out of the furnace.

このような坩堝吊上げ具によれば、溶解炉Ｍ内の坩堝Ｌ周囲の狭い空間内にコンパクトに挿入されて坩堝Ｌを確実に吊り上げることができる。なお、ガイド片１４およびガイド棒Ｒは必ずしも設ける必要はない。また、係止片３の進出・退入は必ずしも回動させて行うものである必要はない。さらに、各支持板２に設けた操作部材４を個別に操作するのに代えて、同時に操作する構造としても良い。支持板２は四か所以上設けるようにしても良い。 According to such a crucible lifting tool, the crucible L can be reliably lifted by being compactly inserted into a narrow space around the crucible L in the melting furnace M. The guide piece 14 and the guide rod R are not necessarily provided. Further, the advancement / retraction of the locking piece 3 is not necessarily performed by rotating. Furthermore, it is good also as a structure operated instead of operating the operation member 4 provided in each support plate 2 separately. Four or more support plates 2 may be provided.

１…連結体、１３…吊上げ用係止部、２…支持板、３…係止片、３２…軸部材、４…操作部材、４１…操作棒、Ｌ…坩堝、Ｍ…溶解炉、Ｓ…間隙。 DESCRIPTION OF SYMBOLS 1 ... Connection body, 13 ... Lifting latching part, 2 ... Support plate, 3 ... Locking piece, 32 ... Shaft member, 4 ... Operation member, 41 ... Operation rod, L ... Crucible, M ... Melting furnace, S ... gap.

Claims

坩堝の外周とこれに対向する溶解炉の内周との間の間隙を経て、周方向の少なくとも三箇所で上方から前記溶解炉内へ進入させられる複数の支持板と、これら支持板の各上端を連結する連結体と、前記支持板の下端部に設けられ板内に収容された退入状態から、漸次下方へ縮径する前記坩堝の底部外周に向けて進出操作させられる係止片と、前記支持板の上端方向から前記係止片を進退操作する操作部材とを具備する坩堝吊上げ具。 A plurality of support plates that are allowed to enter the melting furnace from above in at least three locations in the circumferential direction through a gap between the outer periphery of the crucible and the inner periphery of the melting furnace that faces the crucible, and upper ends of these supporting plates And a locking piece that is operated to advance toward the outer periphery of the bottom of the crucible that gradually decreases in diameter from the retracted state that is provided in the lower end of the support plate and is accommodated in the plate, A crucible lifting tool comprising: an operating member that advances and retracts the locking piece from the upper end direction of the support plate.

前記係止片は下端が軸部材に結合されて、退入状態から回動進出させられるようになっている請求項１に記載の坩堝吊上げ具。 The crucible lifting tool according to claim 1, wherein a lower end of the locking piece is coupled to a shaft member so that the locking piece is rotated and advanced from a retracted state.

前記操作部材は前記支持板の側面に沿った操作棒を備えており、操作棒の下端が前記軸部材の軸心に対し偏心した位置で軸部材に連結されてこれを回動操作するように構成されている請求項２に記載の坩堝吊上げ具。 The operation member includes an operation rod along the side surface of the support plate, and the lower end of the operation rod is connected to the shaft member at a position eccentric to the shaft center of the shaft member so as to rotate the shaft member. The crucible lifting tool according to claim 2, which is configured.