JP7744838B2 - Lifting jig and lifting method - Google Patents
Lifting jig and lifting methodInfo
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- JP7744838B2 JP7744838B2 JP2022014927A JP2022014927A JP7744838B2 JP 7744838 B2 JP7744838 B2 JP 7744838B2 JP 2022014927 A JP2022014927 A JP 2022014927A JP 2022014927 A JP2022014927 A JP 2022014927A JP 7744838 B2 JP7744838 B2 JP 7744838B2
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Description
特許法第３０条第２項適用 令和３年７月２８日、神戸港西部地区港湾施設改修及び整備工事における物揚場（住所：兵庫県神戸市長田区高松町１－５５）での「吊り治具及び吊り上げ方法」の使用Article 30, paragraph 2 of the Patent Act applied. July 28, 2021: Use of the "lifting jig and lifting method" at a landing yard (address: 1-55 Takamatsu-cho, Nagata-ku, Kobe, Hyogo Prefecture) during the renovation and maintenance work of port facilities in the western area of Kobe Port.
本発明は、クレーンによる吊り荷の吊り作業に用いられる吊り治具と、吊り治具を用いてクレーンにより吊り荷を吊り上げる吊り上げ方法とに関するものである。 The present invention relates to a lifting jig used in lifting loads using a crane, and a lifting method for lifting a load using a crane using the lifting jig.
例えば建築現場などにおいて、比較的大型の吊り荷をクレーンによって吊り上げる際には、吊り荷をバランスよく吊り上げるために、吊り治具や吊り天秤といったものが用いられる。例えば、特許文献１には、複数の油圧シリンダを具備し、吊り荷の荷重を油圧シリンダの駆動力として利用する構造により、コストの低減やシリンダの制御系の単純化を図る吊り天秤が開示されている。 For example, when a crane is used to lift a relatively large load at a construction site, a lifting jig or a lifting balance is used to ensure that the load is lifted in a balanced manner. For example, Patent Document 1 discloses a lifting balance equipped with multiple hydraulic cylinders that uses the load of the load as the driving force for the hydraulic cylinders, thereby reducing costs and simplifying the cylinder control system.
ここで、現場において吊り上げる吊り荷には、様々な形状や大きさのものが存在する。このため、従来は、形状や大きさが異なる吊り荷毎に、その吊り荷をバランスよく吊り上げるための吊り治具を予め用意し、吊り荷に応じて吊り治具を変更して使い分けていた。従って、複数の吊り治具を製作するためのコストが嵩むだけでなく、作業時に吊り治具を付け替える手間によって作業効率が低下していた。また、特許文献１に開示されたような吊り天秤は、地切り時に油圧シリンダを利用してバランス調整を行うことが必要な吊り荷に対しては有用であるが、その他の吊り荷が対象の場合は、性能が過剰で構造が複雑過ぎるものであった。 Here, loads to be lifted at work sites come in a variety of shapes and sizes. For this reason, conventionally, a different lifting jig was prepared in advance for each different shape and size of load to ensure proper balance, and the lifting jig was changed and used depending on the load. This not only increased the cost of producing multiple lifting jigs, but also reduced work efficiency due to the effort required to change the lifting jig during work. Furthermore, while the lifting balance disclosed in Patent Document 1 is useful for loads that require balancing adjustment using a hydraulic cylinder when lifting from the ground, its performance was excessive and its structure was too complex for other loads.
本発明は上記課題に鑑みてなされたものであり、その目的とするところは、形状や大きさが異なる複数の吊り荷の吊り作業を、単純な構成の吊り治具によって効率よく進めることにある。 The present invention was made in consideration of the above-mentioned problems, and its purpose is to efficiently carry out the lifting work of multiple loads of different shapes and sizes using a lifting jig with a simple configuration.
（発明の態様）
以下の発明の態様は、本発明の構成を例示するものであり、本発明の多様な構成の理解を容易にするために、項別けして説明するものである。各項は、本発明の技術的範囲を限定するものではなく、発明を実施するための最良の形態を参酌しつつ、各項の構成要素の一部を置換し、削除し、又は、更に他の構成要素を付加したものについても、本発明の技術的範囲に含まれ得るものである。
(Aspects of the invention)
The following embodiments of the present invention are examples of the configuration of the present invention, and are described in terms to facilitate understanding of the various configurations of the present invention. Each term does not limit the technical scope of the present invention, and while taking into consideration the best mode for carrying out the invention, some of the components of each term may be replaced or deleted, or other components may be added, and these may also be included in the technical scope of the present invention.
（１）クレーンによる吊り荷の吊り作業に用いられる吊り治具であって、長手方向の中央において、上下に重ねられて交差する態様で接続される２本の長手部材と、該２本の長手部材の各々の、前記長手方向の中央の接続位置と前記長手方向の両端部との間の２つの領域の下側に設けられ、前記吊り荷に接続される吊り荷側ワイヤが連結される複数の吊り穴が前記長手方向に間隔を空けて形成された下部材と、前記２本の長手部材の各々の、前記接続位置から前記長手方向の両端側へ等距離離れた２つの位置の上側に設けられ、前記クレーンに接続されるクレーン側ワイヤが連結される上部材と、を含み、前記２本の長手部材は、互いの交差角度が自在に変化するように接続されている吊り治具。 (1) A lifting jig used for lifting a load using a crane, comprising: two longitudinal members connected in a crossing manner, stacked one on top of the other, at the longitudinal center; a lower member provided on the lower side of each of the two longitudinal members in two regions between the connection position at the longitudinal center and both longitudinal ends, and having a plurality of lifting holes formed at intervals along the longitudinal direction to which load-side wires connected to the load are connected; and an upper member provided on the upper side of each of the two longitudinal members at two positions equidistant from the connection positions to both longitudinal ends, and to which crane-side wires connected to the crane are connected; the two longitudinal members are connected so that the crossing angle between them can be freely changed.
本項に記載の吊り治具は、２本の長手部材と、これら２本の長手部材の各々に設けられた下部材及び上部材とを含み、２本の長手部材は、互いの長手方向の中央において上下に重ねられ、そこで互いに交差する態様で接続されている。下部材は、各長手部材の上述したような長手方向の中央の接続位置と、各長手部材の長手方向の両端部との間の、２つの領域の下側に設けられる。すなわち、下部材は、長手部材の各々において、接続位置と長手方向の一方側端部との間の領域、及び、接続位置と長手方向の他方側端部との間の領域に設けられ、吊り治具全体で４つの領域に設けられる。そして、そのような下部材の各々には、長手部材の長手方向に間隔を空けて複数の吊り穴が形成されており、これら複数の吊り穴の何れか１つに対して、吊り作業時に、吊り荷側に接続される吊り荷側ワイヤが連結される。このため、吊り治具と吊り荷との間は、４本の吊り荷側ワイヤにより連結される。 The lifting jig described in this section includes two longitudinal members and a lower member and an upper member attached to each of the two longitudinal members. The two longitudinal members are stacked one above the other at their longitudinal centers and connected in a crosswise manner at these locations. The lower members are provided below two regions between the connection position at the longitudinal center of each longitudinal member and both longitudinal ends of each longitudinal member. That is, the lower members are provided in the region between the connection position and one longitudinal end of each longitudinal member and the region between the connection position and the other longitudinal end of each longitudinal member, resulting in four regions throughout the lifting jig. Each of these lower members has multiple lifting holes formed at intervals along the longitudinal direction of the longitudinal member. A load-side wire connected to the load is connected to one of these multiple lifting holes during lifting operations. Therefore, the lifting jig and the load are connected by four load-side wires.
上部材は、各長手部材の接続位置から、各長手部材の長手方向の両端側へ等距離離れた２つの位置の上側に設けられる。すなわち、上部材は、長手部材の各々において、接続位置から長手方向の一方側へ一定距離離れた位置と、接続位置から長手方向の他方側へ同じく一定距離離れた位置とに設けられ、吊り治具全体で４つの位置に設けられる。そして、このような上部材の各々には、吊り作業時に、クレーンに接続されるクレーン側ワイヤが連結される。このため、吊り治具とクレーンとの間は、４本のクレーン側ワイヤにより連結される。更に、上記のように交差する態様で接続された２本の長手部材は、互いの交差角度が自在に変化するように接続されている。 The upper members are located above two positions equidistant from the connection position of each longitudinal member toward both ends of the longitudinal direction of each longitudinal member. That is, for each longitudinal member, the upper members are located at a position a fixed distance from the connection position to one side of the longitudinal direction and a similar fixed distance from the connection position to the other side of the longitudinal direction, for a total of four positions on the lifting jig. Furthermore, crane wires connected to the crane during lifting operations are connected to each of these upper members. Therefore, the lifting jig and the crane are connected by four crane wires. Furthermore, the two longitudinal members connected in an intersecting manner as described above are connected so that the angle of intersection between them can be freely changed.
このような構成により、吊り荷側ワイヤの連結位置が、各下部材において複数の吊り穴の中から自由に選択されると共に、２本の長手部材の交差角度が、吊り荷に応じて変化するものとなる。そこで、例えば、吊り荷がバランスよく吊り上げられるように、吊り荷の構造計算などによって、吊り荷側ワイヤを接続する吊り荷の４箇所の吊り位置や、２本の長手部材の交差角度を、形状や大きさが異なる吊り荷毎に予め設定することとする。そして、吊り荷の吊り作業時に、各下部材において、吊り荷側ワイヤを予め定められた吊り位置に対応した位置の吊り穴へ連結し、更に、４つの位置に設けられた上部材へクレーン側ワイヤを連結した状態で、クレーンにより吊り荷を吊り上げる。すると、２本の長手部材の交差角度が、吊り荷毎に予め定められた角度まで変化し、その角度で停止した状態になる。 With this configuration, the connection position of the load-side wire can be freely selected from multiple lifting holes on each lower member, and the crossing angle between the two longitudinal members can be changed depending on the load. Therefore, for example, to ensure that the load is lifted in a balanced manner, the four lifting positions on the load where the load-side wires are connected and the crossing angle between the two longitudinal members are preset for each load of different shapes and sizes through structural calculations of the load. Then, during the load lifting operation, the load-side wire is connected to the lifting hole at a position corresponding to the predetermined lifting position on each lower member, and the crane wire is connected to the upper members located at four positions. The load is then lifted by the crane. The crossing angle between the two longitudinal members then changes to the predetermined angle for each load and stops at that angle.
これにより、吊り荷の形状や大きさに応じた適切な吊り位置及び長手部材の交差角度で、吊り荷がバランスよく吊り上げられるものとなる。更に、使用する吊り穴が自由に選択され、２本の長手部材の交差角度が自在に変化することから、２本の長手部材の長さでカバーされる範囲で、様々な形状や大きさの吊り荷に対応するものである。このため、形状や大きさが異なる吊り荷毎に吊り治具を付け替える必要もなく、効率よく吊り作業が進められるものである。しかも、油圧シリンダなどの複雑な機構を利用することなく、２本の長手部材、上部材、及び下部材という単純な構成であるにも関わらず、効率のよい吊り作業が実現されるものである。 This allows the load to be lifted in a balanced manner at an appropriate lifting position and crossing angle of the longitudinal members according to the shape and size of the load. Furthermore, because the lifting holes to be used can be freely selected and the crossing angle of the two longitudinal members can be freely changed, it is possible to accommodate loads of various shapes and sizes within the range covered by the length of the two longitudinal members. This eliminates the need to change the lifting jig for each load of different shapes and sizes, allowing for efficient lifting operations. Moreover, efficient lifting operations are achieved despite the simple configuration of two longitudinal members, an upper member, and a lower member, without the use of complex mechanisms such as hydraulic cylinders.
（２）上記（１）項において、前記下部材は、前記長手方向へ延在すると共に下方へ突出した板材で形成され、前記２本の長手部材のうち、上側の長手部材の前記２つの領域に設けられた前記下部材と、下側の長手部材の前記２つの領域に設けられた前記下部材とは、前記２本の長手部材が重ねられた上下方向に関して、双方の下縁が同じ高さにあると共に、双方の前記複数の吊り穴が同じ高さに形成されている吊り治具。
本項に記載の吊り治具は、各長手部材において２つの領域に設けられる下部材が板材で形成され、この板材は、長手部材の長手方向へ延在すると共に下方へ突出している。このため、板材の２つの面が、長手部材の長手方向と上下方向との双方に直交する方向を向いており、その２つの面を貫通して、複数の吊り穴が形成されている。
(2) In the above paragraph (1), the lower member is formed of a plate material that extends in the longitudinal direction and protrudes downward, and of the two longitudinal members, the lower member provided in the two regions of the upper longitudinal member and the lower member provided in the two regions of the lower longitudinal member have their lower edges at the same height in the vertical direction in which the two longitudinal members are stacked, and both of the multiple hanging holes are formed at the same height.
In the hanging jig described in this section, the lower members provided in two regions of each longitudinal member are formed of a plate material that extends in the longitudinal direction of the longitudinal member and protrudes downward, so that two surfaces of the plate material face in directions perpendicular to both the longitudinal direction and the up-down direction of the longitudinal member, and multiple hanging holes are formed through the two surfaces.
また、２本の長手部材のうち、上側に重ねられた一方の長手部材の２つの領域に設けられた下部材と、下側に重ねられたもう一方の長手部材の２つの領域に設けられた下部材とは、２本の長手部材が重ねられた上下方向に関して、双方の下縁が同じ高さに位置している。すなわち、下側の長手部材に設けられた下部材としての板材は、複数の吊り穴の穿設や吊り穴への吊り荷側ワイヤの連結に必要な長さで下方へ突出し、上側の長手部材に設けられた下部材としての板材は、下側の長手部材を超えて、下側の長手部材の板材の下縁と同じ位置まで下方へ突出している。 Furthermore, the lower members provided in two areas of one of the two longitudinal members stacked on top and the lower members provided in two areas of the other longitudinal member stacked on top have their lower edges positioned at the same height in the vertical direction in which the two longitudinal members are stacked. In other words, the plate material serving as the lower member provided on the lower longitudinal member protrudes downward by the length necessary for drilling multiple lifting holes and connecting the load-side wires to the lifting holes, while the plate material serving as the lower member provided on the upper longitudinal member protrudes downward beyond the lower longitudinal member to the same position as the lower edge of the plate material of the lower longitudinal member.
これにより、交差した２本の長手部材から下方へ延びる、合計で４枚の板材の下縁が、平面視でＸ字のような位置関係で同一平面上に位置することになるため、未使用時の吊り治具が単独で、地面などにおいて安定した姿勢を維持するものである。更に、下部材の各々に形成される複数の吊り穴が、上側の長手部材に設けられた下部材と、下側の長手部材に設けられた下部材とで、同じ高さに形成されている。これにより、吊り荷へ接続される４本の吊り荷側ワイヤの長さを同じにすることで、吊り治具と吊り荷との間の連結に起因して吊り荷が斜めに吊り上げられることはなく、吊り荷がより安定した姿勢で吊り上げられるものとなる。 As a result, the lower edges of the four plates extending downward from the two intersecting longitudinal members are positioned on the same plane in an X-like position when viewed from above, allowing the lifting jig to maintain a stable position on the ground or other surface when not in use. Furthermore, the multiple lifting holes formed in each of the lower members are formed at the same height on the lower member provided on the upper longitudinal member and the lower member provided on the lower longitudinal member. This ensures that the lengths of the four load-side wires connected to the load are the same, preventing the load from being lifted at an angle due to the connection between the lifting jig and the load, and allowing the load to be lifted in a more stable position.
（３）上記（１）（２）項において、前記２本の長手部材のうち、上側の長手部材の前記２つの位置に設けられた前記上部材と、下側の長手部材の前記２つの位置に設けられた前記上部材とは、前記２本の長手部材が重ねられた上下方向に関して、前記クレーン側ワイヤとの双方の連結位置が同じ高さにある吊り治具。
本項に記載の吊り治具は、２本の長手部材のうち、上側に重ねられた一方の長手部材の２つの位置に設けられた上部材と、下側に重ねられたもう一方の長手部材の２つの位置に設けられた上部材とについて規定するものである。
(3) In the above paragraphs (1) and (2), the upper member provided at the two positions of the upper longitudinal member and the upper member provided at the two positions of the lower longitudinal member are a lifting jig in which the connection positions of both with the crane side wire are at the same height in the vertical direction in which the two longitudinal members are stacked.
The hanging jig described in this section specifies upper members provided at two positions on one of two longitudinal members that is stacked on top of the other longitudinal member, and upper members provided at two positions on the other longitudinal member that is stacked on the bottom of the other longitudinal member.
具体的に、上側の長手部材の上部材と、下側の長手部材の上部材とは、２本の長手部材が重ねられた上下方向に関して、クレーン側ワイヤとの双方の連結位置が同じ高さにある。すなわち、下側の長手部材に設けられた上部材は、少なくとも、上側の長手部材を超えて、上側の長手部材の上部材にクレーン側ワイヤが連結される位置と同じ高さまで上方へ突出しており、上側の長手部材の上部材と同じ高さ位置においてクレーン側ワイヤが連結される。これにより、クレーンへ接続される４本のクレーン側ワイヤの長さを同じにすることで、吊り治具とクレーンとの間の連結に起因して吊り荷が斜めに吊り上げられることはなく、吊り荷がより安定した姿勢で吊り上げられるものとなる。 Specifically, the connection positions of the upper member of the upper longitudinal member and the upper member of the lower longitudinal member to the crane wire are at the same height in the vertical direction when the two longitudinal members are stacked. In other words, the upper member attached to the lower longitudinal member protrudes upward at least beyond the upper longitudinal member to the same height as the position where the crane wire is connected to the upper member of the upper longitudinal member, and the crane wire is connected at the same height as the upper member of the upper longitudinal member. In this way, by making the lengths of the four crane wires connected to the crane the same, the load will not be lifted at an angle due to the connection between the lifting jig and the crane, and the load will be lifted in a more stable position.
（４）上記（１）から（３）項において、前記２本の長手部材の各々は、角形の鋼管により形成され、前記下部材が前記鋼管の下面に取り付けられると共に、前記上部材が前記鋼管の上面に取り付けられている吊り治具。
本項に記載の吊り治具は、２本の長手部材の各々が角形の鋼管により形成されたものであり、それらの各鋼管の下面の２つの領域に下部材が取り付けられ、各鋼管の上面の２つの位置に上部材が取り付けられる。このような構成により、吊り治具の製作が容易になると共に、鋼管が利用されることで必要な強度の確保と軽量化との双方が図られるものである。
(4) In the above items (1) to (3), each of the two longitudinal members is formed from a square steel pipe, the lower member is attached to the lower surface of the steel pipe, and the upper member is attached to the upper surface of the steel pipe.
The lifting jig described in this section has two longitudinal members each formed from a square steel pipe, with a lower member attached to two areas on the underside of each steel pipe and an upper member attached to two positions on the top side of each steel pipe. This configuration makes it easy to manufacture the lifting jig, and by using steel pipes, it is possible to ensure both the necessary strength and weight reduction.
（５）上記（１）から（４）項において、前記吊り荷の、少なくとも重心が考慮された４箇所に吊り輪が設けられており、前記吊り穴に対して、前記吊り輪に接続された前記吊り荷側ワイヤが連結される吊り治具。
本項に記載の吊り治具は、下部材の吊り穴に連結される吊り荷側ワイヤの接続先である吊り荷に、吊り位置となる吊り輪が４箇所に設けられているものである。すなわち、形状や大きさが異なる吊り荷毎に、少なくとも吊り荷の重心が考慮された構造計算などによって、各吊り荷がバランスよく吊り上げられるような４箇所の吊り位置が求められ、そこに吊り輪が設けられるものである。そして、このような４箇所の吊り輪に吊り荷側ワイヤが接続され、それらの各々が、吊り治具の各下部材に形成された複数の吊り穴のうち、吊り輪の位置に対応する位置にある吊り穴に連結される。
(5) In the above items (1) to (4), a lifting jig is provided with lifting rings at four locations on the load, taking into consideration at least the center of gravity, and the load-side wire connected to the lifting rings is connected to the lifting holes.
The lifting jig described in this section has four lifting rings provided at four positions on the load to which the load-side wires connected to the lifting holes in the lower member are connected. That is, for each load of different shape and size, four lifting positions are determined through structural calculations that take into account at least the center of gravity of the load so that each load can be lifted in a balanced manner, and lifting rings are provided at those positions. Then, the load-side wires are connected to these four lifting rings, and each of them is connected to one of multiple lifting holes formed in each lower member of the lifting jig that is located at a position corresponding to the position of the lifting ring.
ここで、吊り輪の位置（吊り位置）に対応する吊り穴の選定方法について言及すると、まず、吊り治具が吊り荷の上に仮想的に重ねられたときの平面視で、２本の長手部材の接続位置と吊り荷の重心とが合わせられると共に、２本の長手部材の各々が吊り荷の２箇所の吊り位置を通るような状態を想定する。そして、この状態において、各下部材に形成された複数の吊り穴のうち、長手部材の接続位置からの距離が、吊り荷の重心から各吊り位置への距離と可能な限り等しくなるような吊り穴が選定される。このようにして選定された各吊り穴に吊り荷側ワイヤが連結され、クレーンにより吊り荷が吊り上げられると、吊り荷の重心の真上に２本の長手部材の接続位置があり、更に２本の長手部材が平面視で吊り荷の４箇所の吊り位置に重なるような位置及び交差角度になる。このため、吊り荷がより一層バランスよく吊り上げられるものである。 Regarding the method for selecting the lifting holes corresponding to the positions of the lifting rings (lifting positions), first, imagine a state in which, in a planar view when the lifting jig is virtually placed on top of the load, the connection positions of the two longitudinal members are aligned with the center of gravity of the load, and each of the two longitudinal members passes through two lifting positions on the load. In this state, of the multiple lifting holes formed in each lower member, those are selected so that the distance from the connection positions of the longitudinal members is as equal as possible to the distance from the center of gravity of the load to each lifting position. When the load-side wires are connected to each of the selected lifting holes and the load is lifted by the crane, the connection positions of the two longitudinal members will be directly above the center of gravity of the load, and the positions and intersection angles of the two longitudinal members will be such that they overlap the four lifting positions of the load in a planar view. This allows the load to be lifted in a more balanced manner.
（６）上記（１）から（５）項において、前記吊り荷として、床版を吊り上げるものである吊り治具。
本項に記載の吊り治具は、橋などの建築に用いられる床版を吊り荷として吊り上げるものである。床版は、橋などの形状や据え付け位置などに応じて、様々な形状や大きさのものが製作され、主に据え付け時にクレーンによって吊り上げられる。このため、形状や大きさが異なる複数の床版が、従来の吊り治具のように床版毎に付け替えが行われることなく、本項に記載に吊り治具が使用されて吊り上げられるものとなり、床版の据え付け作業の効率が格段に向上されるものである。
(6) In the above items (1) to (5), a lifting jig for lifting a deck slab as the load.
The lifting jig described in this section is used to lift deck slabs used in the construction of bridges and other structures. Deck slabs are manufactured in various shapes and sizes depending on the shape of the bridge or other structure and the installation location, and are mainly lifted by a crane during installation. Therefore, multiple deck slabs of different shapes and sizes can be lifted using the lifting jig described in this section without having to be replaced for each deck slab as with conventional lifting jigs, significantly improving the efficiency of deck installation work.
（７）吊り治具を用いてクレーンにより吊り荷を吊り上げる方法であって、前記吊り治具を、長手方向の中央において、上下に重ねられて交差する態様で接続される２本の長手部材と、該２本の長手部材の各々の、前記長手方向の中央の接続位置と前記長手方向の両端部との間の２つの領域の下側に設けられ、前記吊り荷に接続される吊り荷側ワイヤが連結される複数の吊り穴が前記長手方向に間隔を空けて形成された下部材と、前記２本の長手部材の各々の、前記接続位置から前記長手方向の両端側へ等距離離れた２つの位置の上側に設けられ、前記クレーンに接続されるクレーン側ワイヤが連結される上部材と、により構成し、前記２本の長手部材の各々の、前記２つの領域に設けられた前記下部材の各々において、前記複数の吊り穴のうちの何れか１つに前記吊り荷側ワイヤを連結すると共に、前記２本の長手部材の各々の、前記２つの位置に設けられた前記上部材の各々に対して、前記クレーン側ワイヤを連結し、前記吊り治具を介して前記クレーンにより前記吊り荷を吊り上げた状態で、前記２本の長手部材の交差角度が、前記吊り荷毎に設定される角度に定まるように、前記交差角度を自在に変化させる吊り上げ方法。 (7) A method for lifting a load with a crane using a lifting jig, comprising: two longitudinal members connected in a crossing manner, stacked one above the other, at the center of the longitudinal direction; a lower member provided on the lower side of each of the two longitudinal members in two regions between the connection position at the center of the longitudinal direction and both ends of the longitudinal direction, and having a plurality of lifting holes formed at intervals in the longitudinal direction to which load-side wires connected to the load are connected; and a lower member provided on the upper side of each of the two longitudinal members at two positions equidistant from the connection position to both ends of the longitudinal direction, and having a plurality of lifting holes formed at intervals in the longitudinal direction to which load-side wires connected to the load are connected. and an upper member to which a crane wire is connected. The load-side wire is connected to one of the multiple lifting holes in each of the lower members provided in the two regions of each of the two longitudinal members, and the crane wire is connected to each of the upper members provided in the two positions of each of the two longitudinal members. With the load lifted by the crane via the lifting jig, the crossing angle of the two longitudinal members can be freely changed so that it is set to an angle set for each load.
（８）上記（７）項において、前記下部材を、前記長手方向へ延在すると共に下方へ突出した板材で形成し、前記２本の長手部材のうち、上側の長手部材の前記２つの領域に設けられた前記下部材と、下側の長手部材の前記２つの領域に設けられた前記下部材とを、前記２本の長手部材が重ねられた上下方向に関して、双方の下縁を同じ高さにすると共に、双方の前記複数の吊り穴を同じ高さに形成する吊り上げ方法。
（９）上記（７）（８）項において、前記２本の長手部材のうち、上側の長手部材の前記２つの位置に設けられた前記上部材と、下側の長手部材の前記２つの位置に設けられた前記上部材とを、前記２本の長手部材が重ねられた上下方向に関して、前記クレーン側ワイヤとの双方の連結位置を同じ高さにする吊り上げ方法。
（１０）上記（７）から（９）項において、前記２本の長手部材の各々を、角形の鋼管により形成し、前記下部材を前記鋼管の下面に取り付けると共に、前記上部材を前記鋼管の上面に取り付ける吊り上げ方法。
(8) In the above item (7), the lower member is formed from a plate material that extends in the longitudinal direction and protrudes downward, and of the two longitudinal members, the lower member provided in the two regions of the upper longitudinal member and the lower member provided in the two regions of the lower longitudinal member are arranged so that the lower edges of both are at the same height in the vertical direction in which the two longitudinal members are stacked, and the multiple lifting holes of both are formed at the same height.
(9) In the above paragraphs (7) and (8), a lifting method is provided in which the connection positions of the upper member provided at the two positions of the upper longitudinal member and the upper member provided at the two positions of the lower longitudinal member are at the same height with respect to the vertical direction in which the two longitudinal members are stacked.
(10) In the above items (7) to (9), a lifting method is provided in which each of the two longitudinal members is formed from a square steel pipe, the lower member is attached to the lower surface of the steel pipe, and the upper member is attached to the upper surface of the steel pipe.
（１１）上記（７）から（１０）項において、前記吊り荷の、少なくとも重心を考慮した４箇所に吊り輪を設け、前記吊り穴に対して、前記吊り輪に接続した前記吊り荷側ワイヤを連結する吊り上げ方法。
（１２）上記（７）から（１１）項において、前記吊り荷として、床版を吊り上げる吊り上げ方法。
そして、（７）から（１２）項に記載の吊り上げ方法は、各々、上記（１）から（６）項の吊り治具を用いて実行されることで、上記（１）から（６）項の吊り治具と同様の作用を奏するものである。
(11) In the above items (7) to (10), a lifting method is provided in which lifting rings are provided at four locations on the load, taking into consideration the center of gravity, and the load-side wires connected to the lifting rings are connected to the lifting holes.
(12) In the above items (7) to (11), a lifting method in which a deck slab is lifted as the load.
The lifting methods described in items (7) to (12) are each carried out using the lifting jigs described in items (1) to (6) above, and thus have the same effect as the lifting jigs described in items (1) to (6) above.
本発明は上記のような構成であるため、形状や大きさが異なる複数の吊り荷の吊り作業を、単純な構成の吊り治具によって効率よく進めることが可能となる。 Because the present invention has the above-described configuration, it is possible to efficiently lift multiple loads of different shapes and sizes using a lifting jig with a simple configuration.
以下、本発明を実施するための形態を、添付図面に基づき説明する。ここで、従来技術と同一部分、若しくは相当する部分については、詳しい説明を省略することとし、また、図面の全体にわたって、同一部分若しくは対応する部分は、同一の符号で示している。
まず、本発明の実施の形態に係る吊り治具１０は、例えば図７に示すように、クレーン６０によって吊り荷５０を吊り上げる際に、クレーン６０に接続されたクレーン側ワイヤ４２と、吊り荷５０に接続された吊り荷側ワイヤ４０との間に介在して、吊り荷５０をバランスよく吊り上げるためのものである。
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Here, detailed descriptions of parts that are the same as or corresponding to those in the prior art will be omitted, and the same reference numerals will be used throughout the drawings to indicate the same or corresponding parts.
First, as shown in Figure 7, the lifting jig 10 according to an embodiment of the present invention is positioned between the crane side wire 42 connected to the crane 60 and the load side wire 40 connected to the load 50 when lifting the load 50 by the crane 60, thereby lifting the load 50 in a balanced manner.
図１に示すように、本発明の実施の形態に係る吊り治具１０は、２本の長手部材１２及び１４と、２本の長手部材１２及び１４の各々に設けられた下部材２０と、同じく２本の長手部材１２及び１４の各々に設けられた上部材３０とを含んでいる。２本の長手部材１２及び１４は、長手部材１２が上側、長手部材１４が下側の配置で、上下に重ねられて交差するように接続されており、その接続位置１６は、２本の長手部材１２及び１４の互いの長手方向の中央に位置している。なお、図２には、主に長手部材１２及びそこに設けられた下部材２０と上部材３０との詳細を示し、図３には、主に長手部材１４及びそこに設けられた下部材２０と上部材３０との詳細を示しているため、以降はこれらも参照されたい。 As shown in FIG. 1, a lifting jig 10 according to an embodiment of the present invention includes two longitudinal members 12 and 14, a lower member 20 attached to each of the two longitudinal members 12 and 14, and an upper member 30 attached to each of the two longitudinal members 12 and 14. The two longitudinal members 12 and 14 are connected so that they are stacked and cross each other, with the longitudinal member 12 on top and the longitudinal member 14 on the bottom, and the connection position 16 is located at the center of the longitudinal direction of the two longitudinal members 12 and 14. Note that FIG. 2 primarily shows details of the longitudinal member 12 and the lower and upper members 20 and 30 attached thereto, and FIG. 3 primarily shows details of the longitudinal member 14 and the lower and upper members 20 and 30 attached thereto, so please refer to these figures below.
上記のように接続された２本の長手部材１２及び１４は、平面視での互いの交差角度Ｋ（図６参照）が自在に変化するように接続されている。すなわち、例えば図７のように、クレーン６０により吊り治具１０が吊り荷５０と共に吊り上げられたときに、２本の長手部材１２及び１４が接続位置１６を中心として相対的に回転し、その後、交差角度Ｋが吊り荷側ワイヤ４０の連結位置などに応じた一定の角度の状態で回転が停止するように、２本の長手部材１２及び１４は接続されている。このような接続は、接続位置１６において、例えばボルトなどが使用されて実現される。本実施形態において、２本の長手部材１２及び１４の各々は、角形の鋼管によって形成されている。長手部材１２の両端部１２ａ、１２ｂ間の距離と、長手部材１４の両端部１４ａ、１４ｂ間の距離とは、互いに等しくなっており、これに限定されるものではないが、その大きさは例えば４２００ｍｍ程度である。なお、２本の長手部材１２及び１４の長さは、対象とする吊り荷５０の大きさなどに応じて設定してよい。 The two longitudinal members 12 and 14 connected as described above are connected so that the crossing angle K (see Figure 6) between them in a plan view can be freely adjusted. That is, as shown in Figure 7, for example, when the lifting jig 10 is lifted together with the load 50 by the crane 60, the two longitudinal members 12 and 14 rotate relative to each other about the connection position 16, and then the rotation stops at a constant crossing angle K that corresponds to the connection position of the load-side wire 40, among other factors. This connection is achieved at the connection position 16 using, for example, a bolt. In this embodiment, each of the two longitudinal members 12 and 14 is formed from a rectangular steel pipe. The distance between the ends 12a, 12b of the longitudinal member 12 and the distance between the ends 14a, 14b of the longitudinal member 14 are equal to each other. While not limited to this, this distance is, for example, approximately 4200 mm. The length of the two longitudinal members 12 and 14 may be set depending on the size of the load 50 to be suspended.
長手部材１２の下部材２０（２０Ａ、２０Ｂ）は、長手部材１２の長手方向中央に位置する接続位置１６と両端部１２ａ及び１２ｂとの夫々の間の、２つの領域の下側に設けられている。図１及び図２で確認できるように、本実施形態では、角形の鋼管である長手部材１２の下面に、鋼材などで形成される矩形板状の下部材２０Ａ、２０Ｂが取り付けられている。図２（ａ）に示すように、下部材２０Ａは、長手部材１２の長手方向に関して、長手部材１２の一方の端部１２ａから、接続位置１６よりも図中左側の位置まで延在しており、その下縁２２が長手部材１４よりも下方に位置している。また、下部材２０Ｂは、長手部材１２の長手方向に関して、長手部材１２の他方の端部１２ｂから、接続位置１６よりも図中右側の位置まで延在しており、その下縁２２が、長手部材１４よりも下方の、下部材２０Ａの下縁２２と同じ高さ位置にある。 The lower members 20 (20A, 20B) of the longitudinal member 12 are provided below two regions between the connection position 16, located in the longitudinal center of the longitudinal member 12, and both end portions 12a and 12b. As can be seen in Figures 1 and 2, in this embodiment, rectangular plate-shaped lower members 20A and 20B made of steel or other materials are attached to the underside of the longitudinal member 12, which is a square steel pipe. As shown in Figure 2(a), the lower member 20A extends from one end 12a of the longitudinal member 12 to a position to the left of the connection position 16 in the figure, with its lower edge 22 located below the longitudinal member 14. Additionally, the lower member 20B extends in the longitudinal direction of the longitudinal member 12 from the other end 12b of the longitudinal member 12 to a position to the right of the connection position 16 in the figure, with its lower edge 22 located below the longitudinal member 14 and at the same height as the lower edge 22 of the lower member 20A.
下部材２０Ａ、２０Ｂの各々には、長手部材１２への接続部分の近傍に、複数の補強材２６が設けられている。更に、下部材２０Ａ、２０Ｂの各々には、吊り荷側ワイヤ４０（図７参照）を連結するための複数の吊り穴２４が形成されている。これら複数の吊り穴２４は、下部材２０Ａ及び２０Ｂの下端近傍に、長手部材１２の長手方向に沿って互いに等間隔の位置に形成されている。これに限定されるものではないが、下部材２０Ａ、２０Ｂの大きさは、図２（ａ）における左右方向の長さが１６００ｍｍ程度、上下方向の長さが３８０ｍｍであり、隣接する吊り穴２４の中心同士の間隔が１００ｍｍ程度である。 Each of the lower members 20A, 20B has a plurality of reinforcing members 26 near the connection portion to the longitudinal member 12. Furthermore, each of the lower members 20A, 20B has a plurality of lifting holes 24 formed therein for connecting the load-side wires 40 (see Figure 7). These lifting holes 24 are formed near the lower ends of the lower members 20A and 20B, at equally spaced positions along the longitudinal direction of the longitudinal member 12. Although not limited thereto, the dimensions of the lower members 20A, 20B are approximately 1600 mm in the left-right direction and 380 mm in the up-down direction in Figure 2(a), with the distance between the centers of adjacent lifting holes 24 being approximately 100 mm.
これに対し、長手部材１４の下部材２０（２０Ｃ、２０Ｄ）は、長手部材１２の下部材２０と同様に、長手部材１４の長手方向中央に位置する接続位置１６と両端部１４ａ及び１４ｂとの夫々の間の、２つの領域の下側に設けられている。図１及び図３で確認できるように、本実施形態では、角形の鋼管である長手部材１４の下面に、鋼材などで形成される矩形板状の下部材２０Ｃ、２０Ｄが取り付けられている。図３（ａ）に示すように、下部材２０Ｃは、長手部材１４の長手方向に関して、長手部材１４の一方の端部１４ａから、接続位置１６よりも図中左側の位置まで延在している。また、下部材２０Ｄは、長手部材１４の長手方向に関して、長手部材１４の他方の端部１４ｂから、接続位置１６よりも図中右側の位置まで延在している。下部材２０Ｃの下縁２２と下部材２０Ｄの下縁２２とは、同じ高さ位置にある。 In contrast, the lower members 20 (20C, 20D) of the longitudinal member 14, like the lower member 20 of the longitudinal member 12, are located below two regions between the connection position 16, located in the longitudinal center of the longitudinal member 14, and both end portions 14a and 14b. As can be seen in Figures 1 and 3, in this embodiment, rectangular plate-shaped lower members 20C and 20D made of steel or other materials are attached to the underside of the longitudinal member 14, which is a rectangular steel pipe. As shown in Figure 3(a), the lower member 20C extends from one end 14a of the longitudinal member 14 to a position to the left of the connection position 16 in the figure. The lower member 20D extends from the other end 14b of the longitudinal member 14 to a position to the right of the connection position 16 in the figure. The lower edge 22 of the lower member 20C and the lower edge 22 of the lower member 20D are at the same height.
下部材２０Ａ、２０Ｂと同様に、下部材２０Ｃ、２０Ｄの各々には、長手部材１４への接続部分の近傍に複数の補強材２６が設けられると共に、吊り荷側ワイヤ４０（図７参照）を連結するための複数の吊り穴２４が、長手部材１４の長手方向に沿って互いに等間隔の位置に形成されている。これに限定されるものではないが、下部材２０Ｃ、２０Ｄの大きさは、図３（ａ）における左右方向の長さが、下部材２０Ａ、２０Ｂと同じく１６００ｍｍ程度、上下方向の長さが１００ｍｍであり、隣接する吊り穴２４の中心同士の間隔が、下部材２０Ａ、２０Ｂと同じく１００ｍｍ程度である。 Similar to lower members 20A and 20B, lower members 20C and 20D each have multiple reinforcing members 26 near the connection portion to longitudinal member 14, and multiple lifting holes 24 for connecting load-side wires 40 (see Figure 7) are formed at equally spaced positions along the longitudinal direction of longitudinal member 14. Although not limited to this, the size of lower members 20C and 20D is approximately 1600 mm in the left-right direction in Figure 3(a), the same as lower members 20A and 20B, and 100 mm in the up-down direction, and the distance between the centers of adjacent lifting holes 24 is approximately 100 mm, the same as lower members 20A and 20B.
そして、図１で確認できるように、上側の長手部材１２に設けられた下部材２０Ａ、２０Ｂの下縁２２と、下側の長手部材１４に設けられた下部材２０Ｃ、２０Ｄの下縁２２とは、同じ高さ位置にあって同一の平面上に位置している。更に、下部材２０Ａ、２０Ｂに形成された複数の吊り穴２４の、下部材２０Ａ、２０Ｂの下縁２２からの距離と、下部材２０Ｃ、２０Ｄに形成された複数の吊り穴２４の、下部材２０Ｃ、２０Ｄの下縁２２からの距離とは、等しくなっている。すなわち、４つの下部材２０Ａ～２０Ｄに形成された複数の吊り穴２４は、全て同じ高さ位置にある。 As can be seen in Figure 1, the lower edges 22 of the lower members 20A and 20B provided on the upper longitudinal member 12 and the lower edges 22 of the lower members 20C and 20D provided on the lower longitudinal member 14 are at the same height and located on the same plane. Furthermore, the distance from the lower edges 22 of the lower members 20A and 20B to the multiple hanging holes 24 formed on the lower members 20A and 20B is the same as the distance from the lower edges 22 of the lower members 20C and 20D to the multiple hanging holes 24 formed on the lower members 20C and 20D. In other words, the multiple hanging holes 24 formed on the four lower members 20A to 20D are all located at the same height.
一方、図１及び図２に示すように、長手部材１２の上部材３０（３０Ａ、３０Ｂ）は、長手部材１２の長手方向中央に位置する接続位置１６と両端部１２ａ及び１２ｂとの夫々の間の、２つの位置の上側に設けられている。そして、長手部材１２の長手方向に関して、接続位置１６から上部材３０Ａまでの距離は、接続位置１６から上部材３０Ｂまでの距離と等しくなっている。また、本実施形態では、角形の鋼管である長手部材１２の上面に、鋼材などで形成される上部材３０Ａ、３０Ｂが、上方へ突出する態様で取り付けられている。 On the other hand, as shown in Figures 1 and 2, the upper members 30 (30A, 30B) of the longitudinal member 12 are provided above two positions between the connection position 16, located in the longitudinal center of the longitudinal member 12, and both end portions 12a and 12b. In the longitudinal direction of the longitudinal member 12, the distance from the connection position 16 to the upper member 30A is equal to the distance from the connection position 16 to the upper member 30B. In this embodiment, the upper members 30A and 30B, made of steel or the like, are attached to the top surface of the longitudinal member 12, which is a rectangular steel pipe, in a manner that protrudes upward.
上部材３０Ａ、３０Ｂは、同じ高さ位置まで突出しており、夫々の先端に、クレーン側ワイヤ４２（図７参照）が連結される連結位置３２としての穴が形成されている。なお、図１では、上部材３０Ａ、３０Ｂの連結位置３２に、上部材３０Ａ、３０Ｂとクレーン側ワイヤ４２とを連結する連結具４６が取り付けられている。上部材３０Ａ、３０Ｂの各々には、長手部材１２への接続部分の近傍に、２つの補強材３６が設けられている。これに限定されるものではないが、上部材３０Ａ、３０Ｂの大きさは、長手部材１２の上面からの高さが１２５ｍｍ程度であり、図２（ａ）における接続位置１６から上部材３０Ａ、３０Ｂまで左右方向の距離は、１６００ｍｍ程度である。 The upper members 30A and 30B protrude to the same height, and a hole is formed at each end as a connection position 32 to which the crane wire 42 (see Figure 7) is connected. In Figure 1, connectors 46 that connect the upper members 30A and 30B to the crane wire 42 are attached to the connection positions 32 of the upper members 30A and 30B. Two reinforcing members 36 are provided on each of the upper members 30A and 30B near the connection portion to the longitudinal member 12. While not limited to this, the size of the upper members 30A and 30B is approximately 125 mm high from the top surface of the longitudinal member 12, and the horizontal distance from the connection position 16 in Figure 2(a) to the upper members 30A and 30B is approximately 1600 mm.
他方、図１及び図３に示すように、長手部材１４の上部材３０（３０Ｃ、３０Ｄ）は、長手部材１２の上部材３０と同様に、長手部材１４の長手方向中央に位置する接続位置１６と両端部１４ａ及び１４ｂとの夫々の間の、２つの位置の上側に設けられている。そして、長手部材１４の長手方向に関して、接続位置１６から上部材３０Ｃまでの距離は、接続位置１６から上部材３０Ｄまでの距離と等しくなっている。また、本実施形態では、角形の鋼管である長手部材１４の上面に、鋼材などで形成される上部材３０Ｃ、３０Ｄが、上方へ突出する態様で取り付けられている。 On the other hand, as shown in Figures 1 and 3, the upper members 30 (30C, 30D) of the longitudinal member 14, like the upper member 30 of the longitudinal member 12, are provided above two positions between the connection position 16 located in the longitudinal center of the longitudinal member 14 and both end portions 14a and 14b. In the longitudinal direction of the longitudinal member 14, the distance from the connection position 16 to the upper member 30C is equal to the distance from the connection position 16 to the upper member 30D. In this embodiment, the upper members 30C and 30D, made of steel or the like, are attached to the top surface of the longitudinal member 14, which is a rectangular steel pipe, in a manner that protrudes upward.
上部材３０Ｃ、３０Ｄは、同じ高さ位置まで突出しており、夫々の先端に、クレーン側ワイヤ４２（図７参照）が連結される連結位置３２としての穴が形成されている。なお、図１では、上部材３０Ａ、３０Ｂと同様に、上部材３０Ｃ、３０Ｄの連結位置３２に、上部材３０Ｃ、３０Ｄとクレーン側ワイヤ４２とを連結する連結具４６が取り付けられている。上部材３０Ｃ、３０Ｄの各々には、長手部材１４への接続部分の近傍に、２つの補強材３６が設けられている。これに限定されるものではないが、上部材３０Ｃ、３０Ｄの大きさは、長手部材１４の上面からの高さが４１０ｍｍ程度であり、図３（ａ）における接続位置１６から上部材３０Ｃ、３０Ｄまで左右方向の距離は、１６００ｍｍ程度である。すなわち、接続位置１６から４つの上部材３０Ａ～３０Ｄの各々までの距離は、全て等しくなっている。また、４つの上部材３０Ａ～３０Ｄは、全て同じ高さ位置まで突出しており、全ての連結位置３２が同じ高さ位置にある。 The upper members 30C and 30D protrude to the same height, and each has a hole at its tip as a connection position 32 to which the crane wire 42 (see Figure 7) is connected. Note that in Figure 1, similar to the upper members 30A and 30B, connectors 46 are attached to the connection positions 32 of the upper members 30C and 30D, connecting the upper members 30C and 30D to the crane wire 42. Each of the upper members 30C and 30D has two reinforcements 36 near the connection portion to the longitudinal member 14. While not limited to this, the size of the upper members 30C and 30D is approximately 410 mm in height from the top surface of the longitudinal member 14, and the horizontal distance from the connection position 16 to the upper members 30C and 30D in Figure 3(a) is approximately 1600 mm. In other words, the distance from the connection position 16 to each of the four upper members 30A-30D is the same. Furthermore, all four upper members 30A-30D protrude to the same height, and all connection positions 32 are at the same height.
次に、図４及び図５には、本発明の実施の形態に係る吊り治具１０を利用して吊り上げる吊り荷５０の例として、互いに形状及び大きさが異なる２つの床版５６を示している。これらの床版５６には、後述するように設定される４箇所の吊り位置に応じた位置に、吊り輪５２が設けられている。この吊り輪５２は、例えば形状加工された丸鋼などにより形成され、床版５６の製作時におけるコンクリート打設の際に、床版５６の上側の鉄筋と下側の鉄筋との間に埋め込まれるものである。そして、図７に示すように、床版５６がクレーン６０により吊り上げられる際に、各吊り輪５２に連結具などを介して吊り荷側ワイヤ４０が接続されることになる。 Next, Figures 4 and 5 show two deck slabs 56 of different shapes and sizes as examples of loads 50 to be lifted using the lifting jig 10 according to an embodiment of the present invention. Each deck slab 56 is provided with lifting rings 52 at positions corresponding to four lifting positions, which will be set as described below. These lifting rings 52 are formed, for example, from shaped round steel bars, and are embedded between the upper and lower reinforcing bars of the deck slab 56 when pouring concrete during the construction of the deck slab 56. Then, as shown in Figure 7, when the deck slab 56 is lifted by a crane 60, the load-side wires 40 are connected to each lifting ring 52 via connectors or the like.
続いて、図６を参照して、床版５６の吊り位置などの設定方法について簡単に説明する。なお、図６（ａ）は図４の床版５６に対応するイメージ図であり、図６（ｂ）は図５の床版５６に対応するイメージ図である。図示のように、重心Ｇが図示された床版５６の平面図（符号５６´で示す）に、２本の長手部材１２、１４の配置を示す２本の仮想線（符号１２´及び１４´で示す）と、仮想円Ｃとが重ねられている。２本の仮想線１２´及び１４´は、その交差位置（接続位置１６に相当）が床版５６´の重心Ｇに合わせられており、互いの交差角度が符号Ｋで示されている。仮想円Ｃは、接続位置１６から等しい距離にある４つの上部材３０（図６では符号３０´で示す）が配置され得る位置を示しており、仮想円Ｃの半径が接続位置１６から各上部材３０までの距離に相当する。 Next, a method for setting the suspension position of the deck slab 56 will be briefly described with reference to Figure 6. Note that Figure 6(a) is an image corresponding to the deck slab 56 in Figure 4, and Figure 6(b) is an image corresponding to the deck slab 56 in Figure 5. As shown, two imaginary lines (indicated by reference numerals 12' and 14') indicating the arrangement of the two longitudinal members 12, 14 and an imaginary circle C are superimposed on a plan view of the deck slab 56 (indicated by reference numeral 56') showing the center of gravity G. The intersection position (corresponding to connection position 16) of the two imaginary lines 12' and 14' is aligned with the center of gravity G of the deck slab 56', and the intersection angle between them is indicated by reference numeral K. The imaginary circle C indicates the positions at which four upper members 30 (indicated by reference numeral 30' in Figure 6) that are equidistant from the connection position 16 can be positioned, and the radius of the imaginary circle C corresponds to the distance from the connection position 16 to each upper member 30.
上記のような状態で、４つの上部材３０´が、床版５６´上やその近傍に可能な限り互いに間隔を空けて配置されるように、２本の仮想線１２´及び１４´の交差角度Ｋを設定する。そして、２本の仮想線１２´及び１４´上で、４つの上部材３０´から重心Ｇ側へ離れた位置に、４つの吊り位置Ｓが設定される。４つの上部材３０´から４つの吊り位置Ｓまでの距離Ｌは、床版５６の構造計算などから、床版５６が損傷しないような床版５６´の端縁からの最低限のクリアランスが確保されると共に、４つの吊り位置Ｓに荷重が均等にかかるように設定され、互いに大きさが異なっていてもよい。なお、床版５６´には、構造計算のための補助線が描かれている。 In the above state, the intersection angle K of the two imaginary lines 12' and 14' is set so that the four upper members 30' are positioned as far apart as possible from each other on or near the deck slab 56'. Four suspension positions S are then set on the two imaginary lines 12' and 14' at positions away from the four upper members 30' toward the center of gravity G. The distances L from the four upper members 30' to the four suspension positions S are set based on structural calculations of the deck slab 56 to ensure a minimum clearance from the edge of the deck slab 56' so as not to damage the deck slab 56, and so that the load is distributed evenly across the four suspension positions S; these distances may be different from each other. Note that auxiliary lines for structural calculations are drawn on the deck slab 56'.
そして、上記のように設定された４箇所の吊り位置Ｓに、図４及び図５に示したような吊り輪５２が設置され、それらに吊り荷側ワイヤ４０が接続される。更に、４本の吊り荷側ワイヤ４０の各々は、４つの下部材２０の各々に設けられた複数の吊り穴２４の中から、連結先の吊り穴２４が選定されて連結される。このとき、連結先の吊り穴２４として、図６に示したような上部材３０´から吊り位置Ｓまでの距離Ｌや、重心Ｇから吊り位置Ｓまでの距離などに対して、上部材３０や接続位置１６からの距離が最も近い位置にある吊り穴２４が選定される。例えば、図６（ａ）における左上の上部材３０´が、図２（ａ）に示す長手部材１２の上部材３０Ａに相当する場合について言及する。この場合、下部材２０Ａに形成された複数の吊り穴２４の中から、上部材３０Ａや接続位置１６からの図２（ａ）における左右方向の距離が、図６（ａ）における左上の距離Ｌや重心Ｇから吊り位置Ｓまでの距離に、可能な限り近い位置の吊り穴２４が選定される。 Then, lifting rings 52 as shown in Figures 4 and 5 are installed at the four lifting positions S set as described above, and the load-side wires 40 are connected to them. Furthermore, each of the four load-side wires 40 is connected to a destination lifting hole 24 selected from among the multiple lifting holes 24 provided in each of the four lower members 20. At this time, the destination lifting hole 24 is selected as the lifting hole 24 closest to the upper member 30 or the connection position 16, based on the distance L from the upper member 30' to the lifting position S as shown in Figure 6, and the distance from the center of gravity G to the lifting position S. For example, consider the case where the upper left upper member 30' in Figure 6(a) corresponds to the upper member 30A of the longitudinal member 12 shown in Figure 2(a). In this case, from among the multiple hanging holes 24 formed in the lower member 20A, a hanging hole 24 is selected whose left-right distance in FIG. 2(a) from the upper member 30A or the connection position 16 is as close as possible to the distance L in the upper left corner in FIG. 6(a) or the distance from the center of gravity G to the hanging position S.
ここで、本発明の実施の形態に係る吊り治具１０は、図１～図３に示した構成に限定されるものではなく、別の構成であってもよい。例えば、２本の長手部材１２、１４は、角形の鋼管以外の管材や、管材ではないもので形成されていてもよい。また、下部材２０や上部材３０は、図示とは異なる形状のものであってもよく、下部材２０の各々に形成される吊り穴２４の数量や間隔も、図示の数量や間隔と異なっていてもよい。更に、本発明の実施の形態に係る吊り治具１０は、図４や図５に示された床版５６のみを対象とするものではなく、床版５６以外の吊り荷５０の吊り上げに利用されてもよい。また、吊り荷５０に設けられる吊り輪５２は、４箇所の吊り位置Ｓに対して必ずしも１対１で設けられる必要はなく、１箇所の吊り位置Ｓを２つの吊り輪５２でカバーするように、合計で８箇所に吊り輪５２が設けられてもよい。更に、吊り荷５０の大きさや形状に応じて、吊り位置Ｓが２箇所にのみ設定されてもよい。 The lifting jig 10 according to the embodiment of the present invention is not limited to the configuration shown in Figures 1 to 3 and may have other configurations. For example, the two longitudinal members 12, 14 may be formed of pipe material other than square steel pipes, or may be formed of a material other than pipe material. Furthermore, the lower member 20 and the upper member 30 may have shapes different from those shown in the figures, and the number and spacing of the lifting holes 24 formed in each of the lower member 20 may also differ from those shown. Furthermore, the lifting jig 10 according to the embodiment of the present invention is not intended for use with the deck slab 56 shown in Figures 4 and 5, but may also be used to lift loads 50 other than deck slabs 56. Furthermore, the lifting rings 52 attached to the load 50 do not necessarily need to be provided one-to-one with respect to the four lifting positions S. A total of eight lifting rings 52 may be provided, with each lifting position S being covered by two lifting rings 52. Furthermore, depending on the size and shape of the suspended load 50, the suspension position S may be set to only two locations.
さて、上記構成をなす本発明の実施の形態によれば、次のような作用効果を得ることが可能である。すなわち、本発明の実施の形態に係る吊り治具１０は、図１～図３に示すように、２本の長手部材１２、１４と、これら２本の長手部材１２、１４の各々に設けられた下部材２０及び上部材３０とを含んでいる。２本の長手部材１２、１４は、互いの長手方向の中央において上下に重ねられ、そこで互いに交差する態様で接続されている。下部材２０は、各長手部材１２、１４の上述したような長手方向の中央の接続位置１６と、各長手部材１２、１４の長手方向の両端部１２ａ、１２ｂ、１４ａ、１４ｂとの間の、２つの領域の下側に設けられる。 The embodiment of the present invention having the above-described configuration can achieve the following effects. Specifically, as shown in Figures 1 to 3, the lifting jig 10 according to the embodiment of the present invention includes two longitudinal members 12, 14, and a lower member 20 and an upper member 30 attached to each of these two longitudinal members 12, 14. The two longitudinal members 12, 14 are stacked one above the other at their longitudinal centers and connected in a crossing manner at these points. The lower member 20 is provided below two regions between the connection position 16 at the longitudinal center of each longitudinal member 12, 14 as described above and both longitudinal ends 12a, 12b, 14a, 14b of each longitudinal member 12, 14.
すなわち、下部材２０は、長手部材１２、１４の各々において、接続位置１６と長手方向の一方側端部１２ａ、１４ａとの間の領域、及び、接続位置１６と長手方向の他方側端部１２ｂ、１４ｂとの間の領域に設けられ、吊り治具１０全体で４つの領域に設けられる。そして、そのような下部材２０（２０Ａ～２０Ｄ）の各々には、長手部材１２、１４の長手方向に間隔を空けて複数の吊り穴２４が形成されており、これら複数の吊り穴２４の何れか１つに対して、吊り作業時に、吊り荷５０側に接続される吊り荷側ワイヤ４０（図７参照）が連結される。このため、吊り治具１０と吊り荷５０との間は、４本の吊り荷側ワイヤ４０により連結される。 That is, the lower members 20 are provided in four areas on each of the longitudinal members 12, 14, in the area between the connection position 16 and one longitudinal end 12a, 14a, and in the area between the connection position 16 and the other longitudinal end 12b, 14b. Each of these lower members 20 (20A-20D) has multiple lifting holes 24 formed at intervals along the longitudinal direction of the longitudinal members 12, 14. During lifting operations, a load-side wire 40 (see Figure 7) connected to the load 50 is connected to one of these multiple lifting holes 24. Therefore, the lifting jig 10 and the load 50 are connected by four load-side wires 40.
上部材３０は、各長手部材１２、１４の接続位置１６から、各長手部材１２、１４の長手方向の両端１２ａ、１２ｂ、１４ａ、１４ｂ側へ等距離離れた２つの位置の上側に設けられる。すなわち、上部材３０は、長手部材１２、１４の各々において、接続位置１６から長手方向の一方側（１２ａ、１４ａ側）へ一定距離離れた位置と、接続位置１６から長手方向の他方側（１２ｂ、１４ｂ側）へ同じく一定距離離れた位置とに設けられ、吊り治具１０全体で４つの位置に設けられる。そして、このような上部材３０（３０Ａ～３０Ｄ）の各々には、吊り作業時に、クレーン６０に接続されるクレーン側ワイヤ４２（図７参照）が連結される。このため、吊り治具１０とクレーン６０との間は、４本のクレーン側ワイヤ４２により連結される。更に、上記のように交差する態様で接続された２本の長手部材１２、１４は、互いの交差角度Ｋ（図６参照）が自在に変化するように接続されている。 The upper members 30 are provided above two positions equidistant from the connection positions 16 of each longitudinal member 12, 14 toward both longitudinal ends 12a, 12b, 14a, and 14b of each longitudinal member 12, 14. That is, on each longitudinal member 12, 14, the upper members 30 are provided at a position a fixed distance from the connection positions 16 toward one longitudinal side (12a, 14a) and a fixed distance from the connection positions 16 toward the other longitudinal side (12b, 14b), resulting in four positions on the lifting jig 10 as a whole. Furthermore, crane wires 42 (see Figure 7) connected to the crane 60 are connected to each of these upper members 30 (30A-30D) during lifting operations. Therefore, the lifting jig 10 and the crane 60 are connected by four crane wires 42. Furthermore, the two longitudinal members 12, 14 connected in an intersecting manner as described above are connected so that the intersecting angle K (see Figure 6) between them can be freely changed.
このような構成により、吊り荷側ワイヤ４０の連結位置を、各下部材２０において複数の吊り穴２４の中から自由に選択することができると共に、２本の長手部材１２、１４の交差角度Ｋを、吊り荷５０に応じて変化させることができる。そこで、例えば、吊り荷５０がバランスよく吊り上げられるように、図６に示すように、吊り荷５０の構造計算などによって、吊り荷側ワイヤ４０を接続する吊り荷５０の４箇所の吊り位置Ｓや、２本の長手部材１２、１４の交差角度Ｋを、形状や大きさが異なる吊り荷５０毎に予め設定することとする。そして、吊り荷５０の吊り作業時に、各下部材２０において、吊り荷側ワイヤ４０を予め定められた吊り位置Ｓに対応した位置の吊り穴２４へ連結し、更に、４つの位置に設けられた上部材３０へクレーン側ワイヤ４２を連結した状態で、クレーン６０により吊り荷５０を吊り上げる。すると、２本の長手部材１２、１４の交差角度Ｋが、吊り荷５０毎に予め定められた角度まで変化し、その角度で停止した状態になる。 With this configuration, the connection position of the load-side wire 40 can be freely selected from among multiple lifting holes 24 in each lower member 20, and the intersection angle K of the two longitudinal members 12, 14 can be changed depending on the load 50. Therefore, for example, to ensure that the load 50 is lifted in a balanced manner, as shown in Figure 6, the four lifting positions S of the load 50 to which the load-side wire 40 is connected and the intersection angle K of the two longitudinal members 12, 14 are pre-set for each load 50 of different shapes and sizes through structural calculations of the load 50. During the lifting operation of the load 50, the load-side wire 40 is connected to the lifting hole 24 in each lower member 20 at a position corresponding to the predetermined lifting position S, and the crane-side wire 42 is connected to the upper members 30 at the four positions. The load 50 is then lifted by the crane 60. This causes the intersection angle K of the two longitudinal members 12, 14 to change to a predetermined angle for each suspended load 50 and then stop at that angle.
これにより、吊り荷５０の形状や大きさに応じた適切な吊り位置Ｓ及び長手部材１２、１４の交差角度Ｋで、吊り荷５０をバランスよく吊り上げることができる。更に、使用する吊り穴２４を自由に選択することができ、２本の長手部材１２、１４の交差角度Ｋを自在に変化させることができるため、２本の長手部材１２、１４の長さでカバーできる範囲で、様々な形状や大きさの吊り荷５０に対応することができる。このため、形状や大きさが異なる吊り荷５０毎に吊り治具１０を付け替える必要もなく、効率よく吊り作業を進めることが可能となる。しかも、油圧シリンダなどの複雑な機構を利用することなく、２本の長手部材１２、１４、下部材２０、及び上部材３０という単純な構成であるにも関わらず、効率のよい吊り作業を実現することができる。 This allows the load 50 to be lifted in a balanced manner at an appropriate lifting position S and intersection angle K between the longitudinal members 12, 14, depending on the shape and size of the load 50. Furthermore, the lifting holes 24 to be used can be freely selected, and the intersection angle K between the two longitudinal members 12, 14 can be freely changed, making it possible to accommodate loads 50 of various shapes and sizes within the range that can be covered by the lengths of the two longitudinal members 12, 14. This eliminates the need to change the lifting jig 10 for each load 50 of different shapes and sizes, allowing for efficient lifting operations. Moreover, efficient lifting operations can be achieved despite the simple configuration of two longitudinal members 12, 14, a lower member 20, and an upper member 30, without the use of complex mechanisms such as hydraulic cylinders.
また、本発明の実施の形態に係る吊り治具１０は、図１～図３に示すように、各長手部材１２、１４において２つの領域に設けられる下部材２０が板材で形成され、この板材は、長手部材１２、１４の長手方向へ延在すると共に下方へ突出している。このため、板材の２つの面が、長手部材１２、１４の長手方向と上下方向との双方に直交する方向を向いており、その２つの面を貫通して、複数の吊り穴２４が形成されている。また、２本の長手部材１２、１４のうち、上側に重ねられた一方の長手部材１２の２つの領域に設けられた下部材２０Ａ、２０Ｂと、下側に重ねられたもう一方の長手部材１４の２つの領域に設けられた下部材２０Ｃ、２０Ｄとは、２本の長手部材１２、１４が重ねられた上下方向に関して、双方の下縁２２が同じ高さに位置している。すなわち、下側の長手部材１４に設けられた下部材２０Ｃ、２０Ｄとしての板材は、複数の吊り穴２４の穿設や吊り穴２４への吊り荷側ワイヤ４０の連結に必要な長さで下方へ突出している。また、上側の長手部材１２に設けられた下部材２０Ａ、２０Ｂとしての板材は、下側の長手部材１４を超えて、下側の長手部材１４の板材の下縁２２と同じ位置まで下方へ突出している。 In addition, as shown in Figures 1 to 3, the lifting jig 10 according to an embodiment of the present invention has lower members 20 formed from plate material, which extend in the longitudinal direction of the longitudinal members 12, 14 and protrude downward. Therefore, two surfaces of the plate material face in directions perpendicular to both the longitudinal direction and the vertical direction of the longitudinal members 12, 14, and multiple lifting holes 24 are formed through the two surfaces. Furthermore, the lower members 20A, 20B provided in two areas of one longitudinal member 12 stacked on top of the other longitudinal member 14, and the lower members 20C, 20D provided in two areas of the other longitudinal member 14 stacked on top of the other, have their lower edges 22 positioned at the same height in the vertical direction when the two longitudinal members 12, 14 are stacked. That is, the plate materials serving as lower members 20C and 20D attached to the lower longitudinal member 14 protrude downward by the length necessary for drilling multiple lifting holes 24 and connecting the load-side wires 40 to the lifting holes 24. In addition, the plate materials serving as lower members 20A and 20B attached to the upper longitudinal member 12 protrude downward beyond the lower longitudinal member 14 to the same position as the lower edge 22 of the plate material of the lower longitudinal member 14.
これにより、交差した２本の長手部材１２、１４から下方へ延びる、合計で４枚の板材の下縁２２が、平面視でＸ字のような位置関係で同一平面上に位置することになるため、図１に示すように、未使用時の吊り治具１０を単独で、地面などにおいて安定した姿勢に維持することができる。更に、下部材２０の各々に形成される複数の吊り穴２４が、上側の長手部材１２に設けられた下部材２０Ａ、２０Ｂと、下側の長手部材１４に設けられた下部材２０Ｃ、２０Ｄとで、同じ高さに形成されている。これにより、吊り荷５０へ接続する４本の吊り荷側ワイヤ４０の長さを同じにすることで、吊り治具１０と吊り荷５０との間の連結に起因して吊り荷５０が斜めに吊り上げられることはなく、吊り荷５０をより安定した姿勢で吊り上げることが可能となる。 As a result, the lower edges 22 of the four plates extending downward from the two intersecting longitudinal members 12, 14 are positioned on the same plane in an X-like positional relationship in a plan view. As shown in Figure 1, this allows the lifting jig 10 to be maintained in a stable position on the ground when not in use. Furthermore, the multiple lifting holes 24 formed in each of the lower members 20 are formed at the same height for the lower members 20A, 20B on the upper longitudinal member 12 and the lower members 20C, 20D on the lower longitudinal member 14. By making the lengths of the four load-side wires 40 connecting to the load 50 the same, the load 50 will not be lifted at an angle due to the connection between the lifting jig 10 and the load 50, and the load 50 can be lifted in a more stable position.
また、本発明の実施の形態に係る吊り治具１０は、２本の長手部材１２、１４のうち、上側に重ねられた一方の長手部材１２の２つの位置に設けられた上部材３０Ａ、３０Ｂと、下側に重ねられたもう一方の長手部材１４の２つの位置に設けられた上部材３０Ｃ、３０Ｄとについて、以下のように規定するものである。具体的に、上側の長手部材１２の上部材３０Ａ、３０Ｂと、下側の長手部材１４の上部材３０Ｃ、３０Ｄとは、２本の長手部材１２、１４が重ねられた上下方向に関して、クレーン側ワイヤ４２との双方の連結位置３２が同じ高さにある。 Furthermore, in the lifting jig 10 according to the embodiment of the present invention, the upper members 30A, 30B provided at two positions on one of the two longitudinal members 12, 14, which is stacked on top of the other, and the upper members 30C, 30D provided at two positions on the other longitudinal member 14, which is stacked on the bottom, are specified as follows: Specifically, the upper members 30A, 30B of the upper longitudinal member 12 and the upper members 30C, 30D of the lower longitudinal member 14 have their connection positions 32 with the crane wire 42 at the same height in the vertical direction in which the two longitudinal members 12, 14 are stacked.
すなわち、下側の長手部材１４に設けられた上部材３０Ｃ、３０Ｄは、少なくとも、上側の長手部材１２を超えて、上側の長手部材１２の上部材３０Ａ、３０Ｂにクレーン側ワイヤ４２が連結される位置３２と同じ高さまで上方へ突出しており、上側の長手部材１２の上部材３０Ａ、３０Ｂと同じ高さ位置においてクレーン側ワイヤ４２が連結される。これにより、クレーン６０へ接続する４本のクレーン側ワイヤ４２の長さを同じにすることで、吊り治具１０とクレーン６０との間の連結に起因して吊り荷５０が斜めに吊り上げられることはなく、吊り荷５０をより安定した姿勢で吊り上げることができる。 In other words, the upper members 30C and 30D attached to the lower longitudinal member 14 extend upward at least beyond the upper longitudinal member 12 to the same height as the position 32 where the crane wires 42 are connected to the upper members 30A and 30B of the upper longitudinal member 12, and the crane wires 42 are connected at the same height as the upper members 30A and 30B of the upper longitudinal member 12. By making the lengths of the four crane wires 42 connected to the crane 60 the same, the load 50 is not lifted at an angle due to the connection between the lifting jig 10 and the crane 60, and the load 50 can be lifted in a more stable position.
更に、本発明の実施の形態に係る吊り治具１０は、２本の長手部材１２、１４の各々が、角形の鋼管により形成されたものである、そして、それらの各鋼管の下面の２つの領域に下部材２０Ａ、２０Ｂ、又は２０Ｃ、２０Ｄが取り付けられ、各鋼管の上面の２つの位置に上部材３０Ａ、３０Ｂ、又は３０Ｃ、３０Ｄが取り付けられる。このような構成により、吊り治具１０の製作を容易にすることができると共に、鋼管を利用することで必要な強度の確保と軽量化との双方を図ることが可能となる。 Furthermore, in the lifting jig 10 according to an embodiment of the present invention, each of the two longitudinal members 12, 14 is formed from a square steel pipe, and lower members 20A, 20B or 20C, 20D are attached to two areas on the underside of each steel pipe, and upper members 30A, 30B or 30C, 30D are attached to two positions on the top surface of each steel pipe. This configuration makes it easy to manufacture the lifting jig 10, and by using steel pipes, it is possible to ensure both the necessary strength and weight reduction.
また、本発明の実施の形態に係る吊り治具１０は、図４及び図５に示すように、下部材２０の吊り穴２４に連結される吊り荷側ワイヤ４０の接続先である吊り荷５０に、吊り位置Ｓとなる吊り輪５２が４箇所に設けられているものである。すなわち、形状や大きさが異なる吊り荷５０毎に、図６に示すような少なくとも吊り荷５０の重心Ｇが考慮された構造計算などによって、各吊り荷５０がバランスよく吊り上げられるような４箇所の吊り位置Ｓが求められ、そこに対応するように少なくとも４つの吊り輪５２が設けられるものである。そして、このような４箇所の吊り輪５２に吊り荷側ワイヤ４０が接続され、それらの各々が、吊り治具１０の各下部材２０に形成された複数の吊り穴２４のうち、吊り輪５２の位置に対応する位置にある吊り穴２４に連結される。 As shown in Figures 4 and 5, the lifting jig 10 according to an embodiment of the present invention has four lifting rings 52 at the lifting positions S on the load 50 to which the load-side wires 40, which are connected to the lifting holes 24 of the lower member 20, are connected. That is, for each load 50 of different shapes and sizes, four lifting positions S are determined that allow each load 50 to be lifted in a balanced manner through structural calculations that take into account at least the center of gravity G of the load 50, as shown in Figure 6, and at least four lifting rings 52 are provided to correspond to these positions. The load-side wires 40 are then connected to these four lifting rings 52, each of which is connected to a lifting hole 24, among the multiple lifting holes 24 formed in each lower member 20 of the lifting jig 10, that is located at a position corresponding to the position of the lifting ring 52.
ここで、吊り輪５２の位置（吊り位置Ｓ）に対応する吊り穴２４の選定方法について言及すると、まず、吊り治具１０が吊り荷５０の上に仮想的に重ねられたときの平面視で、２本の長手部材１２、１４の接続位置１６と吊り荷５０の重心Ｇとが合わせられると共に、２本の長手部材１２、１４の各々が吊り荷５０の２箇所の吊り位置Ｓを通るような状態（図６参照）を想定する。そして、この状態において、各下部材２０に形成された複数の吊り穴２４のうち、長手部材１２、１４の接続位置１６からの距離が、吊り荷５０の重心Ｇから各吊り位置Ｓへの距離と可能な限り等しくなるような吊り穴２４が選定される。このようにして選定された各吊り穴２４に吊り荷側ワイヤ４０が連結され、クレーン６０により吊り荷５０が吊り上げられると、吊り荷５０の重心Ｇの真上に２本の長手部材１２、１４の接続位置１６があり、更に２本の長手部材１２、１４が平面視で吊り荷５０の４箇所の吊り位置Ｓに重なるような位置及び交差角度Ｋになる。このため、吊り荷５０をより一層バランスよく吊り上げることが可能となる。 Regarding the method for selecting the lifting holes 24 corresponding to the positions of the lifting rings 52 (lifting positions S), first, imagine a state in which, in a plan view when the lifting jig 10 is virtually superimposed on the suspended load 50, the connection positions 16 of the two longitudinal members 12, 14 are aligned with the center of gravity G of the suspended load 50, and each of the two longitudinal members 12, 14 passes through two lifting positions S of the suspended load 50 (see Figure 6). Then, in this state, of the multiple lifting holes 24 formed in each lower member 20, a lifting hole 24 is selected whose distance from the connection positions 16 of the longitudinal members 12, 14 is as equal as possible to the distance from the center of gravity G of the suspended load 50 to each lifting position S. When the load-side wires 40 are connected to the selected lifting holes 24 and the load 50 is lifted by the crane 60, the connection position 16 of the two longitudinal members 12, 14 is located directly above the center of gravity G of the load 50, and the two longitudinal members 12, 14 are positioned and at an intersection angle K such that they overlap the four lifting positions S of the load 50 in a plan view. This makes it possible to lift the load 50 in an even more balanced manner.
加えて、本発明の実施の形態に係る吊り治具１０は、図４及び図５に示すような、橋などの建築に用いられる床版５６を吊り荷５０として吊り上げるものである。床版５６は、橋などの形状や据え付け位置などに応じて、様々な形状や大きさのものが製作され、主に据え付け時にクレーン６０によって吊り上げられる。このため、形状や大きさが異なる複数の床版５６を、従来の吊り治具のように床版５６毎に付け替えを行うことなく、本発明の実施の形態に係る吊り治具１０を使用して吊り上げることができ、床版５６の据え付け作業の効率を格段に向上することが可能となる。
なお、本発明の実施の形態に係る吊り上げ方法は、上述した本発明の実施の形態に係る吊り治具１０を用いて実行されることで、吊り治具１０と同等の作用効果を奏することができる。
In addition, the lifting jig 10 according to the embodiment of the present invention is used to lift a deck 56 used in the construction of a bridge or the like as a load 50, as shown in Figures 4 and 5. Deck slabs 56 are manufactured in various shapes and sizes depending on the shape of the bridge or the like and the installation location, and are mainly lifted by a crane 60 during installation. Therefore, multiple deck slabs 56 of different shapes and sizes can be lifted using the lifting jig 10 according to the embodiment of the present invention without having to be replaced for each deck slab 56 as with conventional lifting jigs, and the efficiency of the installation work of the deck slabs 56 can be significantly improved.
In addition, the lifting method according to the embodiment of the present invention can achieve the same effects as the lifting jig 10 by being carried out using the lifting jig 10 according to the embodiment of the present invention described above.
１０：吊り治具、１２、１４：長手部材、１２ａ、１２ｂ、１４ａ、１４ｂ：端部、１６：接続位置、２０（２０Ａ～２０Ｄ）：下部材、２２：下縁、２４：吊り穴、３０（３０Ａ～３０Ｄ）：上部材、３２：連結位置、４０：吊り荷側ワイヤ、４２：クレーン側ワイヤ、５０：吊り荷、Ｇ：重心、５２：吊り輪、５６：床版、６０：クレーン、Ｋ：交差角度 10: Lifting jig, 12, 14: Longitudinal member, 12a, 12b, 14a, 14b: Ends, 16: Connection position, 20 (20A-20D): Lower member, 22: Lower edge, 24: Lifting hole, 30 (30A-30D): Upper member, 32: Connection position, 40: Load-side wire, 42: Crane-side wire, 50: Lifted load, G: Center of gravity, 52: Lifting ring, 56: Deck slab, 60: Crane, K: Intersection angle
Claims (6)
長手方向の中央において、上下に重ねられて交差する態様で接続される２本の長手部材と、
該２本の長手部材の各々の、前記長手方向の中央の接続位置と前記長手方向の両端部との間の２つの領域の下側に設けられ、前記吊り荷に接続される吊り荷側ワイヤが連結される複数の吊り穴が前記長手方向に間隔を空けて形成された下部材と、
前記２本の長手部材の各々の、前記接続位置から前記長手方向の両端側へ等距離離れた２つの位置の上側に設けられ、前記クレーンに接続されるクレーン側ワイヤが連結される上部材と、を含み、
前記２本の長手部材は、互いの交差角度が自在に変化するように接続され、
前記下部材は、前記長手方向へ延在すると共に下方へ突出した板材で形成され、
前記２本の長手部材のうち、上側の長手部材の前記２つの領域に設けられた前記下部材と、下側の長手部材の前記２つの領域に設けられた前記下部材とは、前記２本の長手部材が重ねられた上下方向に関して、双方の下縁が同じ高さにあると共に、双方の前記複数の吊り穴が同じ高さに形成され、
前記２本の長手部材のうち、上側の長手部材の前記２つの位置に設けられた前記上部材と、下側の長手部材の前記２つの位置に設けられた前記上部材とは、前記２本の長手部材が重ねられた上下方向に関して、前記クレーン側ワイヤとの双方の連結位置が同じ高さにあり、
前記２本の長手部材の各々は、角形の鋼管により形成され、前記下部材が前記鋼管の下面に取り付けられると共に、前記上部材が前記鋼管の上面に取り付けられていることを特徴とする吊り治具。 A lifting jig used for lifting loads by a crane,
Two longitudinal members that are connected in a crossing manner and stacked one on top of the other at the center in the longitudinal direction;
a lower member provided on each of the two longitudinal members in two regions between the connection position in the center of the longitudinal direction and both ends of the longitudinal direction, the lower member having a plurality of hoisting holes formed at intervals in the longitudinal direction to which load-side wires connected to the hoisting load are connected;
an upper member provided on each of the two longitudinal members at two positions equidistant from the connection position toward both ends in the longitudinal direction, and to which a crane side wire connected to the crane is connected;
The two longitudinal members are connected so that the crossing angle between them can be freely changed ,
the lower member is formed of a plate member extending in the longitudinal direction and protruding downward,
Of the two longitudinal members, the lower member provided in the two regions of the upper longitudinal member and the lower member provided in the two regions of the lower longitudinal member have lower edges at the same height in the vertical direction in which the two longitudinal members are stacked, and the multiple hanging holes of both are formed at the same height,
Of the two longitudinal members, the upper member provided at the two positions of the upper longitudinal member and the upper member provided at the two positions of the lower longitudinal member are connected to the crane-side wire at the same height in the vertical direction in which the two longitudinal members are stacked,
A lifting jig characterized in that each of the two longitudinal members is formed from a square steel pipe, the lower member is attached to the lower surface of the steel pipe, and the upper member is attached to the upper surface of the steel pipe .
前記吊り治具を、
長手方向の中央において、上下に重ねられて交差する態様で接続される２本の長手部材と、
該２本の長手部材の各々の、前記長手方向の中央の接続位置と前記長手方向の両端部との間の２つの領域の下側に設けられ、前記吊り荷に接続される吊り荷側ワイヤが連結される複数の吊り穴が前記長手方向に間隔を空けて形成された下部材と、
前記２本の長手部材の各々の、前記接続位置から前記長手方向の両端側へ等距離離れた２つの位置の上側に設けられ、前記クレーンに接続されるクレーン側ワイヤが連結される上部材と、により構成し、
前記２本の長手部材の各々の、前記２つの領域に設けられた前記下部材の各々において、前記複数の吊り穴のうちの何れか１つに前記吊り荷側ワイヤを連結すると共に、前記２本の長手部材の各々の、前記２つの位置に設けられた前記上部材の各々に対して、前記クレーン側ワイヤを連結し、前記吊り治具を介して前記クレーンにより前記吊り荷を吊り上げた状態で、前記２本の長手部材の交差角度が、前記吊り荷毎に設定される角度に定まるように、前記交差角度を自在に変化させ、
前記下部材を、前記長手方向へ延在すると共に下方へ突出した板材で形成し、
前記２本の長手部材のうち、上側の長手部材の前記２つの領域に設けられた前記下部材と、下側の長手部材の前記２つの領域に設けられた前記下部材とを、前記２本の長手部材が重ねられた上下方向に関して、双方の下縁を同じ高さにすると共に、双方の前記複数の吊り穴を同じ高さに形成し、
前記２本の長手部材のうち、上側の長手部材の前記２つの位置に設けられた前記上部材と、下側の長手部材の前記２つの位置に設けられた前記上部材とを、前記２本の長手部材が重ねられた上下方向に関して、前記クレーン側ワイヤとの双方の連結位置を同じ高さにし、
前記２本の長手部材の各々を、角形の鋼管により形成し、前記下部材を前記鋼管の下面に取り付けると共に、前記上部材を前記鋼管の上面に取り付けることを特徴とする吊り上げ方法。 A method for lifting a load with a crane using a lifting jig, comprising:
The hanging jig,
Two longitudinal members that are connected in a crossing manner and stacked one on top of the other at the center in the longitudinal direction;
a lower member provided on each of the two longitudinal members in two regions between the connection position in the center of the longitudinal direction and both ends of the longitudinal direction, the lower member having a plurality of hoisting holes formed at intervals in the longitudinal direction to which load-side wires connected to the hoisting load are connected;
and an upper member provided on each of the two longitudinal members at two positions equidistant from the connection position toward both ends in the longitudinal direction, to which a crane side wire connected to the crane is connected,
In each of the lower members provided in the two regions of each of the two longitudinal members, the load-side wire is connected to any one of the plurality of lifting holes, and the crane-side wire is connected to each of the upper members provided in the two positions of each of the two longitudinal members, and in a state in which the load is lifted by the crane via the lifting jig, the crossing angle of the two longitudinal members is freely changed so that it is set to an angle set for each of the loads ,
The lower member is formed of a plate member extending in the longitudinal direction and protruding downward,
Of the two longitudinal members, the lower member provided in the two regions of the upper longitudinal member and the lower member provided in the two regions of the lower longitudinal member are arranged so that their lower edges are at the same height in the vertical direction in which the two longitudinal members are stacked, and the multiple hanging holes of both are formed at the same height,
Of the two longitudinal members, the upper member provided at the two positions of the upper longitudinal member and the upper member provided at the two positions of the lower longitudinal member are connected to the crane side wire at the same height in the vertical direction in which the two longitudinal members are stacked,
A lifting method characterized in that each of the two longitudinal members is formed from a square steel pipe, the lower member is attached to the underside of the steel pipe, and the upper member is attached to the upper surface of the steel pipe .
6. The lifting method according to claim 4 or 5 , wherein the load to be lifted is a deck slab.
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| JP2009190811A (en) | 2008-02-12 | 2009-08-27 | Toyota Motor Corp | Lifting device and lifting method |
| JP2019089642A (en) | 2017-11-16 | 2019-06-13 | 株式会社イング | Receiving metal fitting for suspension |
| JP2020019578A (en) | 2018-07-30 | 2020-02-06 | 名工建設株式会社 | Cross type balance jig |
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| JP2756466B2 (en) * | 1989-12-19 | 1998-05-25 | 石川島建材工業株式会社 | Method for controlling lifting posture of curved plate and hanging tool for curved plate |
| JP2527989Y2 (en) * | 1991-02-16 | 1997-03-05 | ミサワホーム株式会社 | Panel support device for hoist |
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| JP2009190811A (en) | 2008-02-12 | 2009-08-27 | Toyota Motor Corp | Lifting device and lifting method |
| JP2019089642A (en) | 2017-11-16 | 2019-06-13 | 株式会社イング | Receiving metal fitting for suspension |
| JP2020019578A (en) | 2018-07-30 | 2020-02-06 | 名工建設株式会社 | Cross type balance jig |
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