【０００１】
【発明の属する技術分野】
本発明は、敷き鋼板を敷き並べる際に、鋼板を４点吊りで斜め、または水平に吊り上げる方法に関する。
【０００２】
【従来の技術】
工事現場の傾斜地又は車両導入路に敷く鋼板を敷く作業は、鋼板の吊孔に吊りフックを挿入して垂直１点吊りで吊り上げ、設置終了している鋼板の縁に接近する位置に持ってきて、作業員２人で左右に位置合わせを行なったのち、敷く方向に倒すが、その際、微少な鋼板同士のずれが発生する。そのずれをバールで調整を行って隙間の無いように敷いていく。
また、鋼板をクランプで起こしクレーンで吊り上げたり、マグネットで鋼板を浮かせて４点フックかけし設置場所におろしてマグネットの通電をきるようにしたものも知られている。
【０００３】
【発明が解決しようとする課題】
仮設道路用鋼板または敷鉄板（２２×１，５２４×６，０９６ｍｍまたは２２×１，５２４×３，０４８ｍｍ）を敷く場合は、１点垂直吊りにより先に敷いた鋼板の端部近くにおろし、垂直から水平にたおした後、バールを使って微調整する必要がある。特に、仮設道路用鋼板または敷鉄板を傾斜地に敷くときには、１点垂直吊り上げのままでは先に敷いた鋼板の端部近くにおろすことが困難であり、バールを使って微調整も一層労力を必要とし効率が悪い。
【０００４】
本願人が先に出願した特開平１１−４９４７３号では、片鉤形吊りフックに上下動自在のキャンバーを付設し、山留に必要な山留部材のボルト孔にフックを挿入したのち、キャンバーの吊り孔内への押し込みでフックの片鉤を吊り孔内縁に掛け止めて吊り上げるようにしたものを開示したが、鋼板を傾斜吊りして傾斜地に安全に敷き並べる方法については考慮されていない。
本発明は、鋼板敷きの作業を４点吊りで行うので鋼板敷きの作業が従来の半分程度ですみ、平坦地は勿論、傾斜地での鋼板敷きも４点吊りでワイヤー長さの調整により、角度なりに敷設できて、１点垂直吊り作業より作業効率が向上する鋼板吊り方法を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するため、本発明の請求項１は、鋼板または敷き鉄板を敷き並べるために、鋼板の縁部近くに吊りフックの掛ける空間を確保した４個の吊り孔を設け、その孔を用いて鋼板を４点で吊り上げることを特徴とする鋼板を敷き並べるための吊り方法である。請求項２は、鋼板または敷き鉄板に直接４ケ所の吊り孔を設け、鋼板の搬出入に際して上下の鋼板同士の間に吊りフックの掛ける空間確保のために、前記吊り孔と所定位置離れた位置に、鋼板高さ調整材を鋼板の裏面に配置するか、または溶接するか、もしくは着脱自在に挿合して吊り上げることを特徴とする。
また、請求項３は、鋼板に吊り孔より大きな下孔を明け、その上面に下孔と同心の吊り孔を明けた吊りプレートを溶接し、吊りフックの掛ける空間を確保したことを特徴とし、鋼板または敷き鋼板を敷き並べるために、鋼板の縁部近くに吊りフックの掛ける空間を確保した４個の吊り孔を設け、その孔を用いて鋼板を４点で吊り上げることを特徴とするものである。
【０００６】
上記のように、本発明は、鋼板の縁部近くに少なくとも４個の孔を明け、各孔に吊りフックをかけとめて４点吊りを行うので傾斜地での鋼板敷きもワイヤー長さの調整により傾斜角度なりに出来て、１点垂直吊りので傾斜地に敷設する方法の半分程度ですみ作業効率が向上する。更に、鋼板を吊り上げたのち敷設面に向けて倒す作業が必要ないため非常に安全である。
【０００７】
【発明の実施の形態】
図１は本発明鋼板吊り方法を示すもので、傾斜地での敷設のために、（ａ）は鋼板１０の短辺側を斜めにして吊り上げた状態の正面図であり、同（ｂ）及び（ｃ）は鋼板１０の長辺側を斜めにして吊り上げた状態の正面図と斜視図である。鋼板１０は図２の平面図に示すように、鋼板１０の一方の長辺側中央にあけた通常の１点垂直吊りのフックかけ用長孔１１とは別に、鋼板の両長辺縁部近くに、間隔をあけて２個ずつ、計４個の吊り孔１２をあけ、４本の吊りワイヤー１５の各先端に設けた吊り具（又は吊りフック）を各孔１２に掛け止めて４点で吊り上げる。
図２中の符号１３は、各吊り孔１２と所定位置離れた位置に明けた鋼板高さ調整材取付用の孔であって、鋼板１０の搬出入に際して上下の鋼板同士の間に吊り具の掛ける空間確保のために配置する鋼板高さ調整材（図３以下参照）の取付用の孔である。なお、調整材取付用の孔１３を明けずその位置の鋼板裏面に鋼板高さ調整材を溶接してもよい。
【０００８】
図１における４本の吊りワイヤー１５は、鋼板を所定の傾斜角で吊り上げることができるように、Ｌ１を基準長さとし、予め他の長さＬ２、Ｌ３、Ｌ４を調整しておき、その上端をクレーン側吊りワイヤー１６のシャックル１７に掛け止める。なお、図示例は、鋼板を４点で斜め吊りする場合を示したが、４点吊りワイヤー１５の長さを全部等しくしておけば水平吊りも当然可能である。
【０００９】
このように、４点吊りを行うので鋼板敷きの作業が従来の半分程度ですみ、かつ傾斜地での鋼板敷きもワイヤー長さの調整により傾斜面の角度なりに出来るので、１点垂直吊り作業より一層作業効率が向上する。更に、鋼板を倒す作業が必要ないため非常に安全である。
【００１０】
図３は第１の実施態様である吊り具２０の鉤付きフックを鋼板の吊り孔１２に掛けて吊り上げる状態の正面図、図４は図３のＡ−Ａ線より矢印方向に見た底面図である。
吊り具（鉤付きフック）２０は、吊り具本体の下端に鉤部２１を有し、本体の一方の端面に上下動自在のキャンバー２２を付設してある。キャンバー２２のほぼ長手方向中央にあけた長孔２３に蝶ネジ２４を通すと共に、長孔２３を挟んだキャンバー２２の適当な位置に左右のガイドボルト２５を固着し、ガイドボルト２５の先端を吊り具本体の側面に当接させる。吊り具本体はピン２７にシャックル２６を取付けて吊りワイヤー２８に連結する。
また、鋼板１０の搬出入に際して、積み重ねた上下の鋼板同士の間に吊りフックの掛ける空間確保のために、吊り孔１２と所定位置離れた位置に、鋼板高さ調整材３０を保持する孔１３を明ける。高さ調整材３０は、図３、図５に示すように、大径円筒部３１の下面に孔１３に挿合しうる円筒突起３２を形成させた段付き円筒形をなしており、大径円筒部３１によって上下に重ねた鋼板１０、１０にフックかけの間隔を確保させている。
【００１１】
吊り具２０を孔１２に挿入するときには、蝶ネジ２４をゆるめキャンバー２２を吊り具本体に沿って上方に移動させて固定し（図６）、その状態で鉤部２１をつり孔１２に挿入したのちに、鉤部が孔を通過した位置で、鉤部２１を孔１２の片端に移動させる（図７）。ついで、蝶ネジ２４をゆるめ、キャンバー２２を元の位置に下降させ蝶ネジ２４を締め付けて図３のように鉤部２１を孔１２に係合させる（図８）。
なお、キャンバー２２は中央に長孔２３を有し、さらに、長孔２３の両側部に左右一対のガイドボルト２５を挿通し、その先端部を吊り具２０の本体側面に当接させていることで、キャンバー２２の昇降時の横ぶれを防止している。
【００１２】
図９、１０は高さ調整材の変形例を示す。この高さ調整材３４は、上下に重ねた鋼板間に吊りフックの掛ける空間を確保できる高さを持つ角柱状をなしており、本体の下面に、鋼板に明けた取付け孔１３に挿合するためのナット形突起３６を溶接により固着している。図１０は高さ調整材の底面図を例示するもので、（ａ）は幅狭の高さ調整材本体３５の底面図、（ｂ）は幅広の高さ調整材本体３５ａの底面図である。
【００１３】
図１１は、吊り具の第２実施態様を示すもので、（ａ）は丸棒製吊りフック３７を吊り孔１２に挿入した状態の正面図、（ｂ）は吊り上げ前の吊りフック３７を直立させた状態の正面図、（ｃ）は吊り上げる状態の正面図である。図中、符号３９は吊りフック３７の上端に連結したシャックルである。
吊りフックが丸棒製であるので、吊り孔１２は丸棒径を含むフック先端３８の長さ及び径より大きくされている。
【００１４】
図１２は鋼板１０の別例の平面図を示す。この場合には、鋼板の４ケ所に下孔１４を明け、その上に下孔１４と同心の吊り孔４１を有する円形の吊りプレート４０を溶接により固着したもので、高さ調整材は使用しない。
吊り孔４１は、円形（図１３、１４、１５）、円形プラス片鉤付き（図１７、１８）または円形プラス両鉤付き（図１９、２０）とする。
本発明を実施する際には、例えば、鋼板１０の縁部４個所にφ３８ｍｍの孔１４を明け、各孔１４の上に外径φ６０ｍｍ、中心にφ２５ｍｍの吊り孔を明けた厚さ９または１２ｍｍのプレート（吊りプレート４０）を外周全溶接し、吊り孔にフック（吊り具）２０、または後述するフック（吊り具）４５（図１５）、５５（図１６）、６５（図１９）を挿入して４点で吊り上げる。
【００１５】
図１３は第３の実施態様を示すもので、吊りプレートに吊りフックを掛けた状態の断面図、図１４は吊りプレートの平面図である。
鋼板１０の下孔１４上には、前述のように、同心状の吊り孔４１を有する吊りプレート４０を全周溶接により固着する。図１３に示した吊り具は図３に示したものと同様なものである。
【００１６】
図１５は第４実施態様である丸棒製吊りフック４５を示す。鋼板１０の下孔１４上には、下孔と同心状の吊り孔４１を有する吊りプレート４０を配置し、その全周を溶接により固着する。図１５（ａ）は吊りフック４５を吊りプレート４０の吊り孔４１に挿入した時、（ｂ）は吊り上げ前の吊りフックの直立時、（ｃ）は吊りフック４５の先端部４６を吊り孔４１に掛け止めて鋼板１０を吊り上げる時の断面図である。符号４７は吊りフック４５の上端に連結したシャックルである。
【００１７】
図１６は吊り具の第５実施態様を示すもので、（ａ）は正面図、（ｂ）は側面図、（ｃ）は上記（ａ）のＣ−Ｃ線における断面図である。
この吊り具５５は片鉤部５６を有しており、使用時には、図１７（ａ）の平面図、（ｂ）の断面図に示すように、吊り具５５を片鉤孔６２付き吊りプレート６０の孔６１と、吊り具５５の片鉤部５６を片鉤孔６２に挿合させて、鋼板の下孔１４内に押し込んで、図１８（ａ）の平面図、（ｂ）の断面図に示すように、吊り具５５を９０°回転させて吊り具の片鉤部５６を吊りプレート６０に掛け止めるものである。
【００１８】
図１９は第６実施態様である両鉤付き吊り具６５を吊りプレート７０に掛けて使用する状態の断面図、図２０は図１９のＦ−Ｆ線における断面図である。
この吊り具６５は、両鉤部６６、６６を有して、両鉤形切り欠き７２、７２を有する吊りプレート７０の吊り孔７１に掛け止めるようにしたもので、吊り具６５の両鉤部６６、６６を吊りプレート７０の両鉤形切り欠き７２、７２に挿入させ、吊り具６５を下孔１４に押し込んだのち、図２０のように、吊り具６５を９０°回転させて吊り具６５の両鉤部６６、６６を吊り孔７１に掛け止めるものである。
【００１９】
【発明の効果】
上記のように、本発明は、鋼板の縁部近くに少なくとも４個の吊り孔を明け、各孔に鉤付フックをかけとめて４点吊りを行うので、傾斜地での鋼板敷きもワイヤー長さの調整により角度なりに出来て、１点垂直吊りで傾斜地に敷設する方法の半分程度ですみ作業効率が向上する。更に、鋼板を吊り上げたのち敷設面に向けて倒す作業が必要ないため非常に安全である。
【図面の簡単な説明】
【図１】傾斜地での本発明鋼板吊り方法を示すもので、（ａ）は鋼板の短辺側を吊り上げた状態の正面図、（ｂ）は鋼板の長辺側を吊り上げた状態の正面図、（ｃ）は長辺側を吊り上げた状態の斜視図。
【図２】鋼板の平面図。
【図３】鉤付きフックを備えた吊り具と鋼板高さ調整材を用いて鋼板を吊り上げる第１の実施態様を示す正面図と部分断面図。
【図４】図３のＡ−Ａ線より矢印方向に見た底面図。
【図５】図３のＢ−Ｂ線より矢印方向に見た底面図。
【図６】図３の吊り治具のキャンバーを上方に引き上げて、吊り具の鉤部付きフックを吊り孔に挿入した状態の正面図と部分断面図。
【図７】図６の吊り治具を吊り孔の片端に移動させた状態の正面図と部分断面図。
【図８】図７における吊り治具のキャンバーを下降させて鋼板を吊り上げる状態の正面図と部分断面図。
【図９】鉤付きフックを備えた吊り具と図３における高さ調整材とは異なる鋼板高さ調整材を用いて鋼板を吊り上げる状態の正面図と部分断面図。
【図１０】図９における鋼板高さ調整材の底面図を示し、（ａ）は幅狭の高さ調整材の底面図、（ｂ）は幅広の高さ調整材の底面図。
【図１１】丸棒製吊り具を用いた第２の実施態様を示すもので、（ａ）は丸棒製吊りフックを吊りプレートの孔にかけた状態の断面図、（ｂ）は吊り具を直立させた状態の断面図、（ｃ）は吊り上げた状態の断面図。
【図１２】鋼板の別例の平面図。
【図１３】第３の実施態様を示すもので、鋼板に明けた下孔の上に溶接した吊りプレートに吊り具のフックを掛けた状態の断面図。
【図１４】図１３の吊りプレートの平面図。
【図１５】第４の実施態様である丸棒製吊りフックを示すもので、（ａ）は丸棒製吊りフックを吊りプレートの孔に挿入した状態の断面図、（ｂ）は吊り具を直立させた状態の断面図、（ｃ）は吊り上げた状態の断面図。
【図１６】第５の実施態様である片鉤付き吊り具を示すもので、（ａ）は正面図、（ｂ）は側面図、（ｃ）は上記（ａ）のＣ−Ｃ線における断面図。
【図１７】図１６の片鉤付き吊り具を吊りプレートの孔に挿入した状態を示すもので、（ａ）は平面図、（ｂ）は上記（ａ）のＤ―Ｄ線における断面図。
【図１８】図１７の片鉤付き吊り具を９０°回転させた状態を示すもので、（ａ）は平面図、（ｂ）は上記（ａ）のＥ−Ｅ線における断面図。
【図１９】第６の実施態様である両鉤付き吊り具を吊りプレートに掛けた状態の断面図。
【図２０】図１９のＦ−Ｆ線における断面図。
【符号の説明】
１０ 鋼板 １１ 鋼板１点垂直吊り用長孔
１２ ４点吊り用孔 １３ 高さ調整材取付け孔
１４ 下孔 １５、２８ 吊りワイヤー
１６ クレーンワイヤー １７ フック
２０ 吊り具（鉤付きフック） ２１ 鉤部
２２ キャンバー ２３ 長孔
２４ 蝶ネジ ２５ ガイドボルト
２６ シャックル ２７ ピン
３０、３４ 高さ調整材
３１、３５、３５ａ 高さ調整材本体
３２、３６ 突起 ３７、４５ 吊りフック
３８、４６ 先端部 ３９、４７ シャックル
４０ 吊りプレート ４１ 吊り孔
５５ 吊り具（片鉤付きフック） ５６ 片鉤部
６０ 吊りプレート（片鉤形切り欠き付プレート）
６１ 吊り孔 ６２ 片鉤形切り欠き
６５ 吊り具（両鉤付きフック） ６６ 両鉤部
７０ 吊りプレート（両鉤形切り欠き付プレート）
７１ 吊り孔 ７２ 両鉤形切り欠き[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method of lifting steel sheets diagonally or horizontally at four points when laying and laying steel sheets.
[0002]
[Prior art]
When laying a steel plate to be laid on a slope or vehicle introduction road at a construction site, insert a hook into the hanging hole of the steel plate, lift it vertically at one point, and bring it to a position close to the edge of the steel plate that has been installed. After the two workers perform the positioning in the left and right directions, they are tilted in the laying direction. At this time, slight displacement of the steel plates occurs. Adjust the deviation with a crowbar and spread it without gaps.
There is also known a steel plate which is raised by a clamp and lifted by a crane, or a steel plate is floated by a magnet, hooked at four points, lowered to an installation location, and the magnet is turned off.
[0003]
[Problems to be solved by the invention]
When laying a temporary road steel plate or laying iron plate (22 x 1,524 x 6,096 mm or 22 x 1,524 x 3,048 mm), lower it near the end of the steel plate laid earlier by one point vertical suspension, After going from vertical to horizontal, you need to fine tune with a crowbar. In particular, when laying steel plates for temporary roads or iron sheets on sloping land, it is difficult to lower them near the end of the steel sheet laid earlier with one point vertically lifted, and fine adjustment using a crowbar requires even more effort. And inefficient.
[0004]
In Japanese Patent Application Laid-Open No. H11-49473, filed by the present applicant, a camber that can move up and down is attached to a one-hook suspension hook, and the hook is inserted into a bolt hole of a buckle member necessary for buckling. Although a method in which one hook of the hook is hung on the inner edge of the hanging hole by being pushed into the hanging hole and lifted up is disclosed, a method of safely hanging a steel plate and laying it on a slope is not considered.
In the present invention, since the work of laying steel plates is performed by hanging four points, the work of laying steel plates is about half of the conventional work. It is an object of the present invention to provide a method of suspending a steel sheet that can be laid as it is and has higher working efficiency than a one-point vertical suspending operation.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 of the present invention provides four suspension holes for securing a space for hanging hooks near an edge of the steel plate for laying and laying steel plates or laying iron plates. This is a hanging method for laying and arranging steel sheets, characterized in that the steel sheets are lifted at four points. Claim 2 provides four hanging holes directly in the steel plate or the spread iron plate, and a predetermined distance from the hanging holes to secure a space for hanging hooks between upper and lower steel plates when carrying in and out the steel plate. In addition, the steel plate height adjusting member is arranged on the back surface of the steel plate, welded, or detachably inserted and lifted.
Claim 3 is characterized in that a lower hole larger than the suspension hole is drilled in the steel plate, and a suspension plate having a suspension hole formed concentrically with the lower hole is welded to the upper surface thereof, thereby securing a space for hanging the suspension hook, In order to lay steel sheets or laid steel sheets, four hanging holes are provided near the edges of the steel sheets to secure hanging hooks, and the steel sheets are lifted at four points using the holes. is there.
[0006]
As described above, according to the present invention, at least four holes are drilled near the edge of the steel plate, and hanging hooks are hooked on each hole to perform four-point hanging, so that the steel sheet can be laid on an inclined ground by adjusting the wire length. The work can be done at an angle of inclination, and the work efficiency can be improved by only half the method of laying on an inclined ground because one point is suspended vertically. Furthermore, since it is not necessary to lift the steel plate and then lay it down toward the laying surface, it is very safe.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a method of suspending a steel sheet according to the present invention. FIG. 1 (a) is a front view of a state in which a short side of a steel sheet 10 is lifted obliquely for installation on an inclined ground. c) is a front view and a perspective view of a state in which the long side of the steel plate 10 is suspended obliquely. As shown in the plan view of FIG. 2, the steel plate 10 is located near both long side edges of the steel plate 10 in addition to a normal one-point vertical hanging hook hole 11 provided at the center of one long side of the steel plate 10. A total of four hanging holes 12 are provided at intervals of two, and a hanging tool (or a hanging hook) provided at each end of the four hanging wires 15 is hung on each of the holes 12 to be connected at four points. lift.
Reference numeral 13 in FIG. 2 denotes a hole for mounting a steel plate height adjusting material which is opened at a predetermined distance from each of the hanging holes 12, and a hanging member between the upper and lower steel plates when the steel plate 10 is carried in and out. It is a hole for mounting a steel plate height adjusting material (see FIG. 3 and subsequent figures) arranged to secure a hanging space. Note that the steel plate height adjusting member may be welded to the back surface of the steel plate at that position without opening the hole 13 for mounting the adjusting member.
[0008]
Four suspension wires 15 in FIG. 1, to be able to lift the steel plate at a predetermined inclination angle, a reference length L 1 counsel, previously adjusted in advance other length L 2, L 3, L 4 The upper end is hooked on the shackle 17 of the crane-side suspension wire 16. The illustrated example shows a case where the steel plate is suspended diagonally at four points. However, if the lengths of the four-point suspension wires 15 are all equal, horizontal suspension is naturally possible.
[0009]
In this way, four-point suspension is used, so that the work of laying steel plates is about half of the conventional work, and the laying of steel plates on sloping ground can be adjusted to the angle of the slope by adjusting the wire length. Work efficiency is further improved. In addition, it is very safe because there is no need to work down the steel plate.
[0010]
FIG. 3 is a front view of a state in which a hook with hooks of the hanging device 20 according to the first embodiment is hung on the hanging hole 12 made of a steel plate and is lifted, and FIG. 4 is a bottom view as viewed in a direction indicated by an arrow from line AA of FIG. It is.
The hanger (hook with hook) 20 has a hook 21 at the lower end of the hanger main body, and a vertically movable camber 22 is attached to one end surface of the main body. A thumb screw 24 is passed through a long hole 23 formed substantially at the center of the camber 22 in the longitudinal direction, and left and right guide bolts 25 are fixed to appropriate positions of the camber 22 with the long hole 23 interposed therebetween. Abut the side of the tool body. The hanging tool body has a shackle 26 attached to a pin 27 and connected to a hanging wire 28.
In order to secure a space for hanging hooks between the upper and lower stacked steel plates when loading and unloading the steel plate 10, a hole 13 for holding the steel plate height adjusting member 30 at a predetermined distance from the hanging hole 12 is provided. Dawn. As shown in FIGS. 3 and 5, the height adjusting member 30 has a stepped cylindrical shape in which a cylindrical projection 32 that can be inserted into the hole 13 is formed on the lower surface of the large diameter cylindrical portion 31. A cylindrical portion 31 secures hooking intervals between the steel plates 10 and 10 stacked one above the other.
[0011]
When the hanging tool 20 is inserted into the hole 12, the thumb screw 24 is loosened, the camber 22 is moved upward along the hanging tool body and fixed (FIG. 6), and the hook 21 is inserted into the hanging hole 12 in this state. Thereafter, the hook 21 is moved to one end of the hole 12 at a position where the hook has passed through the hole (FIG. 7). Then, loosen the thumbscrew 24, lower the camber 22 to the original position, and tighten the thumbscrew 24 to engage the hook 21 with the hole 12 as shown in FIG. 3 (FIG. 8).
The camber 22 has a long hole 23 in the center, and a pair of left and right guide bolts 25 is inserted into both sides of the long hole 23, and the tip end thereof is brought into contact with the side surface of the main body of the hanging device 20. This prevents the camber 22 from moving sideways when it is moved up and down.
[0012]
9 and 10 show modified examples of the height adjusting member. The height adjusting member 34 is shaped like a prism having a height enough to secure a space for hanging hooks between the vertically stacked steel plates, and is inserted into the mounting hole 13 formed in the steel plate on the lower surface of the main body. Nut-shaped projection 36 is fixed by welding. FIGS. 10A and 10B illustrate a bottom view of the height adjusting member. FIG. 10A is a bottom view of the narrow height adjusting member main body 35, and FIG. 10B is a bottom view of the wide height adjusting member main body 35a. .
[0013]
11A and 11B show a second embodiment of the hanging device, wherein FIG. 11A is a front view showing a state in which a hanging hook 37 made of a round bar is inserted into a hanging hole 12, and FIG. 11B is an upright view of the hanging hook 37 before being lifted. FIG. 3C is a front view of the state in which it is lifted, and FIG. In the figure, reference numeral 39 denotes a shackle connected to the upper end of the hanging hook 37.
Since the hanging hook is made of a round bar, the length of the hanging hole 12 is larger than the length and diameter of the hook tip 38 including the round bar diameter.
[0014]
FIG. 12 shows a plan view of another example of the steel plate 10. In this case, a pilot hole 14 is formed in four places of the steel plate, and a circular suspension plate 40 having a suspension hole 41 concentric with the pilot hole 14 is fixed thereon by welding, and no height adjusting material is used. .
The hanging hole 41 is circular (FIGS. 13, 14, 15), circular plus one hook (FIGS. 17, 18) or circular plus both hooks (FIGS. 19, 20).
In practicing the present invention, for example, a hole having a diameter of 38 mm is formed at four edges of the steel plate 10, a suspension hole having an outer diameter of 60 mm is formed on each hole 14, and a suspension hole having a diameter of 25 mm is formed at the center. (Suspension plate 40) is entirely welded to the outer periphery, and hooks (hangers) 20 or hooks (hangers) 45 (FIG. 15), 55 (FIG. 16), and 65 (FIG. 19) described later are inserted into the suspension holes. And lift at four points.
[0015]
FIG. 13 shows a third embodiment, and is a cross-sectional view showing a state where a hanging hook is hung on a hanging plate, and FIG. 14 is a plan view of the hanging plate.
As described above, the suspension plate 40 having the concentric suspension holes 41 is fixed to the lower hole 14 of the steel plate 10 by welding all around. The hanger shown in FIG. 13 is similar to that shown in FIG.
[0016]
FIG. 15 shows a hanging hook 45 made of a round bar according to a fourth embodiment. A suspension plate 40 having a suspension hole 41 concentric with the pilot hole is arranged on the pilot hole 14 of the steel plate 10, and the entire periphery thereof is fixed by welding. 15A shows a state where the hanging hook 45 is inserted into the hanging hole 41 of the hanging plate 40, FIG. 15B shows a state where the hanging hook before the lifting is upright, and FIG. FIG. 3 is a cross-sectional view when the steel plate 10 is lifted by being hooked on the base plate. Reference numeral 47 denotes a shackle connected to the upper end of the suspension hook 45.
[0017]
16A and 16B show a fifth embodiment of a hanger, wherein FIG. 16A is a front view, FIG. 16B is a side view, and FIG. 16C is a cross-sectional view taken along line CC of FIG.
The hanging member 55 has a single hook portion 56, and when used, as shown in the plan view of FIG. 17A and the cross-sectional view of FIG. The hole 61 and the hook 56 of the suspending tool 55 are inserted into the hook 62 and pushed into the prepared hole 14 of the steel plate to obtain a plan view of FIG. 18A and a sectional view of FIG. As shown in the figure, the hanging tool 55 is rotated by 90 ° to hook the hook 56 of the hanging tool on the hanging plate 60.
[0018]
FIG. 19 is a cross-sectional view showing a state where the hanging tool 65 with both hooks according to the sixth embodiment is used by hanging it on a hanging plate 70, and FIG. 20 is a cross-sectional view taken along line FF of FIG.
The hanging tool 65 has both hooks 66, 66 and is hooked on a hanging hole 71 of a hanging plate 70 having both hook-shaped notches 72, 72. After inserting the hooks 66 into the both hook-shaped notches 72, 72 of the hanging plate 70 and pushing the hanging tool 65 into the pilot hole 14, the hanging tool 65 is rotated 90 ° as shown in FIG. Are hooked on the hanging holes 71.
[0019]
【The invention's effect】
As described above, according to the present invention, at least four suspension holes are drilled near the edge of the steel sheet, and hooks with hooks are hooked to each hole to perform four-point suspension, so that the steel sheet can be laid on an inclined ground with a wire length. By adjusting the angle, the work efficiency can be improved by only half of the method of laying on a slope with one point vertically suspended. Furthermore, since it is not necessary to lift the steel plate and then lay it down toward the laying surface, it is very safe.
[Brief description of the drawings]
1A and 1B show a method of suspending a steel sheet according to the present invention on a slope, wherein FIG. 1A is a front view of a state in which a short side of a steel sheet is lifted, and FIG. (C) is a perspective view of a state in which the long side is lifted.
FIG. 2 is a plan view of a steel plate.
FIGS. 3A and 3B are a front view and a partial cross-sectional view showing a first embodiment in which a steel plate is lifted using a hanging tool having hooks with hooks and a steel plate height adjusting member.
FIG. 4 is a bottom view as seen from the line AA in FIG. 3 in the direction of the arrow;
FIG. 5 is a bottom view as seen in the direction of the arrow from line BB in FIG. 3;
6 is a front view and a partial cross-sectional view of a state in which a camber of the hanging jig of FIG. 3 is pulled up and a hook with a hook portion of the hanging jig is inserted into a hanging hole.
7 is a front view and a partial cross-sectional view of a state in which the hanging jig of FIG. 6 is moved to one end of a hanging hole.
FIG. 8 is a front view and a partial cross-sectional view of a state in which the camber of the lifting jig in FIG. 7 is lowered to lift a steel plate.
9 is a front view and a partial cross-sectional view of a state in which a steel plate is lifted using a hanging tool having hooks with hooks and a steel plate height adjusting material different from the height adjusting material in FIG. 3;
10 shows a bottom view of the steel sheet height adjusting member in FIG. 9, (a) is a bottom view of a narrow height adjusting member, and (b) is a bottom view of a wide height adjusting member.
11A and 11B show a second embodiment using a hanging rod made of a round bar, wherein FIG. 11A is a cross-sectional view showing a state where a hanging hook made of a round bar is hung on a hole of a hanging plate, and FIG. FIG. 3C is a cross-sectional view in an upright state, and FIG. 3C is a cross-sectional view in a suspended state.
FIG. 12 is a plan view of another example of the steel plate.
FIG. 13 shows the third embodiment, and is a cross-sectional view showing a state where a hook of a hanging tool is hooked on a hanging plate welded to a prepared hole drilled in a steel plate.
FIG. 14 is a plan view of the suspension plate of FIG. 13;
15A and 15B show a hanging hook made of a round bar according to a fourth embodiment, in which FIG. 15A is a cross-sectional view showing a state where the hanging hook made of a round bar is inserted into a hole of a hanging plate, and FIG. FIG. 3C is a cross-sectional view in an upright state, and FIG. 3C is a cross-sectional view in a suspended state.
16 (a) is a front view, FIG. 16 (b) is a side view, and FIG. 16 (c) is a cross section taken along line CC of FIG. 16 (a). FIG.
17A and 17B show a state in which the hanging tool with one hook shown in FIG. 16 is inserted into a hole of a hanging plate, where FIG. 17A is a plan view and FIG. 17B is a cross-sectional view taken along the line DD of FIG.
18 (a) is a plan view, and FIG. 18 (b) is a cross-sectional view taken along the line EE in FIG.
FIG. 19 is a cross-sectional view of a state in which the hanging device with both hooks according to the sixth embodiment is hung on a hanging plate.
FIG. 20 is a sectional view taken along line FF in FIG. 19;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Steel plate 11 Steel plate 1 point Vertical hanging long hole 12 4-point hanging hole 13 Height adjustment material mounting hole 14 Prepared hole 15, 28 Hanging wire 16 Crane wire 17 Hook 20 Hanging tool (hook with hook) 21 Hook 22 Camber 23 Long hole 24 Thumb screw 25 Guide bolt 26 Shackle 27 Pin 30, 34 Height adjustment material 31, 35, 35a Height adjustment material main body 32, 36 Projection 37, 45 Hanging hook 38, 46 Tip 39, 47 Shackle 40 Hanging Plate 41 Suspension hole 55 Suspension (hook with one hook) 56 One-hook part 60 Suspension plate (plate with one-hook notch)
Reference Signs List 61 hanging hole 62 one hook type notch 65 hanging tool (hook with double hook) 66 double hook part 70 hanging plate (plate with double hook type notch)
71 Hanging hole 72 Double hook notch
