JP2013082506A - Seismic isolation support device for traveling crane - Google Patents

Seismic isolation support device for traveling crane Download PDF

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JP2013082506A
JP2013082506A JP2011221523A JP2011221523A JP2013082506A JP 2013082506 A JP2013082506 A JP 2013082506A JP 2011221523 A JP2011221523 A JP 2011221523A JP 2011221523 A JP2011221523 A JP 2011221523A JP 2013082506 A JP2013082506 A JP 2013082506A
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traveling
gravity
center
traveling crane
machine room
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JP5854748B2 (en
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Hirosuke Iwamoto
浩祐 岩本
Yuji Sato
祐二 佐藤
Koji Tanida
宏次 谷田
Osamu Saito
修 齊藤
Hidetoshi Sakai
英聡 酒井
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Ihi Corp
株式会社Ihi
Ihi Transport Machinery Co Ltd
Ihi運搬機械株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a seismic support of traveling crane which prevents a rocking phenomenon where legs are lifted when a large earthquake occurs and minimizes damage.SOLUTION: A boom 7 is rotated upward around a pivot point O so as to be erected by hoisting a rope by means of a boom derricking drum during suspension. A gravity center shifting unit 12 is provided to shift a position of the center of gravity of the travelling crane 1 to an intermediate portion of the legs 5 arranged apart from each other in a travelling direction and in a perpendicular direction. The gravity center shifting unit 12 cancels out a fluctuation of the position of the center of gravity of the travelling crane 1, the fluctuation being caused when the boom 7 is erected during suspension.

Description

本発明は、走行クレーンの免震支持装置に関するものである。   The present invention relates to a seismic isolation support device for a traveling crane.
一般に、港湾部等では、コンテナ等の荷物を船舶に積み降ろしするために大型の走行クレーンが使用されている。   In general, a large traveling crane is used in a harbor portion or the like to load and unload a cargo such as a container on a ship.
前記走行クレーンは、岸壁に敷設された走行レールに沿って車輪を介し走行可能となるよう、四本の脚部を走行方向並びに該走行方向と直角方向へ離間配置し、該脚部の上方に、該脚部の走行方向と直角方向へ延びるガーダと、該ガーダの先端部に枢着され且つ運転時はガーダの先端部から海側へ向け張り出すように配設されるブームとを設けてなる構成を有している。   The traveling crane has four legs separated from each other in the traveling direction and in a direction perpendicular to the traveling direction so as to be able to travel along the traveling rails laid on the quay, and above the legs. A girder that extends in a direction perpendicular to the traveling direction of the leg, and a boom that is pivotally attached to the tip of the girder and that protrudes from the tip of the girder toward the sea during operation. It has the composition which becomes.
この種の走行クレーンにおいては、地震が発生した場合、特に、走行方向と直角方向の加振力が外力として走行クレーンに作用することになるため、平成7年1月に発生した阪神大震災以降、走行クレーンの耐震性を向上することが研究され、さまざまな制振構造や免震構造が開発されているが、港湾法の改正により、走行クレーンの免震支持装置の更なる性能向上が求められている。   In this type of traveling crane, especially when an earthquake occurs, an excitation force in a direction perpendicular to the traveling direction acts on the traveling crane as an external force, so after the Great Hanshin Earthquake that occurred in January 1995, Various studies have been made to improve the earthquake resistance of traveling cranes, and various vibration control structures and seismic isolation structures have been developed. ing.
尚、前述の如き走行クレーンにおいて、地震発生時における脱輪防止の一般的技術水準を示すものとしては、例えば、特許文献1がある。   In the traveling crane as described above, for example, Patent Document 1 shows a general technical level for preventing the wheel from falling off when an earthquake occurs.
特開2010−235300号公報JP 2010-235300 A
しかしながら、前述の如き走行クレーンにおいては、非常に大きな地震が起きた場合、該地震の加振力により、走行方向と直角方向にクレーンが揺れることで、該走行方向と直角方向に離間配置されるクレーンの脚部が左右交互に浮き上がるように応答する、いわゆるロッキング現象が発生し、浮き上がった側の脚部が着地する際、元の位置に戻らずに少し内側若しくは外側にずれ、その結果、車輪が走行レールから離脱する虞があった。   However, in the traveling crane as described above, when an extremely large earthquake occurs, the crane is shaken in a direction perpendicular to the traveling direction by the excitation force of the earthquake, so that the traveling crane is spaced apart from the traveling direction. A so-called rocking phenomenon occurs in which the crane leg responds as if it floats alternately on the left and right sides. May be detached from the running rail.
そして、前記走行クレーンが運転時にブームをガーダの先端部から海側へ向け張り出した状態でも前述の如きロッキング現象は発生するが、特に運転休止時は、前記ブームを枢着点を中心に上方へ回動させて起立させるようになっており、走行方向と直角方向へ離間配置される脚部のうちブームの枢着点から遠い側、即ち陸側の脚部寄りにクレーンの重心位置が移動することから、地震の加振力により、走行方向と直角方向へ離間配置される脚部のうちブームの枢着点に近い側、即ち海側の脚部が浮き上がりやすくなり、前述の如きロッキング現象が更に発生しやすくなっていた。   Even if the traveling crane projects the boom from the tip of the girder toward the sea side during operation, the above-mentioned rocking phenomenon occurs. However, especially during operation suspension, the boom is moved upwards around the pivot point. The crane's center of gravity moves to the side far from the pivot point of the boom, that is, near the leg on the land side, among the legs spaced apart in the direction perpendicular to the traveling direction. Therefore, due to the vibration force of the earthquake, of the legs spaced apart in the direction perpendicular to the traveling direction, the side close to the pivot point of the boom, that is, the leg on the sea side is likely to lift, and the rocking phenomenon as described above is caused. It was more likely to occur.
本発明は、斯かる実情に鑑み、大地震が発生したとしても、脚部が浮き上がるように応答するロッキング現象を抑止することができ、被害を最小限に抑え得る走行クレーンの免震支持装置を提供しようとするものである。   In view of such circumstances, the present invention provides a seismic isolation support device for a traveling crane that can suppress a rocking phenomenon that responds so that a leg rises even if a large earthquake occurs, and can minimize damage. It is something to be offered.
本発明は、走行可能で且つ走行方向並びに該走行方向と直角方向へ離間配置される脚部の上方に、該脚部の走行方向と直角方向へ延びるガーダと、該ガーダの先端部に枢着され且つ運転時はガーダの先端部から張り出すように配設されるブームとが設けられ、該ブームを運転休止時は枢着点を中心に上方へ回動させて起立させる走行クレーンの免震支持装置において、
走行クレーンの重心位置を前記走行方向と直角方向へ離間配置される脚部の中間部に移行させる重心移行手段を備えたことを特徴とする走行クレーンの免震支持装置にかかるものである。
The present invention provides a girder that extends in a direction perpendicular to the traveling direction of the leg, and is pivotally attached to the distal end of the girder above the leg that can travel and is spaced apart from the traveling direction and the direction perpendicular to the traveling direction. And a boom arranged so as to project from the tip of the girder during operation, and when the operation is suspended, the boom is pivoted upward about a pivot point to stand up. In the support device,
The present invention relates to a seismic isolation support device for a traveling crane, characterized by comprising center-of-gravity shifting means for shifting the position of the center of gravity of the traveling crane to an intermediate portion of the legs that are spaced apart from each other in the direction perpendicular to the traveling direction.
上記手段によれば、以下のような作用が得られる。   According to the above means, the following operation can be obtained.
前述の如く構成すると、重心移行手段により、走行方向と直角方向へ離間配置される脚部の中間部に走行クレーンの重心位置を移行させることが可能となるため、この状態で、非常に大きな地震が起きたとしても、クレーンの脚部が交互に浮き上がるように応答する、いわゆるロッキング現象が抑制され、浮き上がった側の脚部が着地する際に元の位置に戻らずに少し内側若しくは外側にずれるようなことが避けられ、その結果、車輪が走行レールから離脱する心配がなくなる。   If configured as described above, the center-of-gravity shifting means can shift the center-of-gravity position of the traveling crane to the middle part of the legs that are spaced apart from each other in the direction perpendicular to the traveling direction. Even if a crash occurs, the so-called rocking phenomenon, in which the crane's legs respond alternately to lift, is suppressed, and the lifted leg does not return to its original position when landing, but slightly shifts inward or outward. Such a situation is avoided, and as a result, there is no worry that the wheel is detached from the traveling rail.
前記走行クレーンの免震支持装置においては、前記重心移行手段により、運転休止時における前記ブームの起立動作に伴う走行クレーンの重心位置変動を打ち消すよう構成することができ、このようにすると、走行クレーンが運転休止時にブームを起立させた場合、重心移行手段により、運転休止時におけるブームの起立動作に伴う走行クレーンの重心位置変動を打ち消すよう、走行方向と直角方向へ離間配置される脚部の中間部に走行クレーンの重心位置を移行させることが可能となるため、この状態で、非常に大きな地震が起きたとしても、走行方向と直角方向へ離間配置される脚部のうちブームの枢着点から遠い側の脚部寄りにクレーンの重心位置は移動していないことから、地震の加振力により、走行方向と直角方向へ離間配置される脚部のうちブームの枢着点に近い側の脚部が浮き上がりにくくなり、ロッキング現象を抑制する上で非常に有効となる。   In the seismic isolation support device for the traveling crane, the center-of-gravity shifting means can be configured to cancel the center-of-gravity position fluctuation of the traveling crane accompanying the standing operation of the boom during operation suspension. When the boom is raised during the suspension of operation, the center of gravity is shifted between the legs that are spaced apart from the traveling direction in a direction perpendicular to the traveling direction so as to cancel the fluctuation of the center of gravity of the traveling crane that accompanies the standing operation of the boom during the suspension of operation. The center of gravity of the traveling crane can be shifted to the section, so even if a very large earthquake occurs in this state, the boom pivot point of the legs that are spaced apart in the direction perpendicular to the traveling direction Because the center of gravity of the crane does not move closer to the legs on the side far from the center, it is spaced apart in the direction perpendicular to the direction of travel by the excitation force of the earthquake. Becomes the side of the leg portion is not easily lift near the pivot point of the boom of the legs, it is very effective in suppressing the rocking phenomenon.
前記走行クレーンの免震支持装置においては、前記走行クレーンの機械室を前記脚部の走行方向と直角方向へ移動自在に配設することにより、前記重心移行手段を構成することができる。   In the seismic isolation support device for the traveling crane, the center-of-gravity shifting means can be configured by disposing the machine room of the traveling crane so as to be movable in a direction perpendicular to the traveling direction of the legs.
又、前記走行クレーンの免震支持装置においては、前記走行クレーンの機械室を、固定配置される第一機械室と、脚部の走行方向と直角方向へ移動自在に配設される第二機械室とに分割し、該第二機械室によって前記重心移行手段を構成することもでき、このようにすると、前記機械室全体を移動させることが構造上困難となる場合に有効となる。   Further, in the seismic isolation support device for the traveling crane, a machine room of the traveling crane is fixedly arranged in a first machine room and a second machine that is arranged to be movable in a direction perpendicular to the traveling direction of the legs. The center-of-gravity shifting means can be constituted by the second machine chamber, and this is effective when it is difficult to move the entire machine chamber in terms of structure.
本発明の走行クレーンの免震支持装置によれば、大地震が発生したとしても、脚部が浮き上がるように応答するロッキング現象を抑止することができ、被害を最小限に抑え得るという優れた効果を奏し得る。   According to the seismic isolation support device for a traveling crane of the present invention, even if a large earthquake occurs, it is possible to suppress a rocking phenomenon that responds so that the leg portion is lifted, and an excellent effect that damage can be minimized. Can be played.
本発明の走行クレーンの免震支持装置の第一実施例を示す全体概要構成図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a whole schematic block diagram which shows the 1st Example of the seismic isolation support apparatus of the traveling crane of this invention. 本発明の走行クレーンの免震支持装置の第一実施例における重心移行手段としての機械室の駆動系の一例を示す図であって、(a)は機械室の側面図、(b)は重心移行用車輪の正面図、(c)は位置決め固定用のアンカーの詳細図である。It is a figure which shows an example of the drive system of the machine room as a gravity center transfer means in 1st Example of the seismic isolation support apparatus of the traveling crane of this invention, Comprising: (a) is a side view of a machine room, (b) is a gravity center FIG. 5C is a front view of the transition wheel, and FIG. 本発明の走行クレーンの免震支持装置の第一実施例における重心移行手段としての機械室の駆動系の他の例を示す図であって、(a)は機械室の側面図、(b)は機械室の平面図である。It is a figure which shows the other example of the drive system of the machine room as a gravity center transfer means in 1st Example of the seismic isolation support apparatus of the traveling crane of this invention, Comprising: (a) is a side view of a machine room, (b) FIG. 3 is a plan view of a machine room. 本発明の走行クレーンの免震支持装置の第二実施例を示す全体概要構成図である。It is a whole schematic block diagram which shows the 2nd Example of the seismic isolation support apparatus of the traveling crane of this invention.
以下、本発明の実施の形態を添付図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.
図1及び図2は本発明の走行クレーンの免震支持装置の第一実施例であって、図1に示す走行クレーン1は、コンテナクレーンであって、岸壁2に敷設された走行レール3に沿って車輪4を介し走行可能となるよう、四本の脚部5を走行方向並びに該走行方向と直角方向へ離間配置し、該脚部5の上方に、該脚部5の走行方向と直角方向へ延びるガーダ6と、該ガーダ6の先端部に枢着され且つ運転時はガーダ6の先端部から海側へ向け張り出すように配設されるブーム7とを設け、前記ガーダ6とブーム7に沿ってトロリー8を、機械室9内の横行ドラム(図示せず)によるロープ牽引方式により横行可能に配設し、該トロリー8から吊り下げられるスプレッダ10を介してコンテナ11を搬送できるようにしてなる構成を有している。   1 and 2 show a first embodiment of the seismic isolation support device for a traveling crane according to the present invention. The traveling crane 1 shown in FIG. 1 is a container crane and is attached to a traveling rail 3 laid on a quay 2. The four leg portions 5 are spaced apart from each other in the traveling direction and in a direction perpendicular to the traveling direction so as to be able to travel along the wheels 4 along the wheels 4, and are perpendicular to the traveling direction of the leg portions 5 above the leg portions 5. A girder 6 extending in the direction, and a boom 7 pivotally attached to the tip of the girder 6 and disposed so as to project from the tip of the girder 6 toward the sea side during operation, the girder 6 and the boom The trolley 8 is disposed so as to be able to traverse by a rope pulling method using a traversing drum (not shown) in the machine room 9, and the container 11 can be conveyed via the spreader 10 suspended from the trolley 8. It has the structure which becomes.
前記ブーム7は、運転休止時は図示していない起伏ドラムによるロープの巻上げにより枢着点Oを中心に上方へ回動させて起立させるようになっており、走行クレーン1の重心位置を前記走行方向と直角方向へ離間配置される脚部5の中間部に移行させる重心移行手段12を備え、該重心移行手段12により、運転休止時における前記ブーム7の起立動作に伴う走行クレーン1の重心位置変動を打ち消すよう構成してある。尚、前記重心移行手段12を構成する機械室9は、図1の実線で示す如く、ガーダ6上の陸側へ後退する位置に固定された状態では、走行方向と直角方向へ離間配置される脚部5の中間部に走行クレーン1の重心位置が設定されるようにしてある。   The boom 7 is configured to stand up by rotating upward about a pivot point O by winding a rope with a hoisting drum (not shown) during operation stop, and the center of gravity of the traveling crane 1 is traveled. Center-of-gravity shifting means 12 for shifting to the intermediate portion of the leg 5 that is spaced apart in the direction perpendicular to the direction, and the center-of-gravity position of the traveling crane 1 accompanying the standing motion of the boom 7 during operation stoppage by the center-of-gravity shifting means 12 It is configured to cancel the fluctuation. The machine room 9 constituting the center-of-gravity shifting means 12 is spaced apart in the direction perpendicular to the traveling direction in a state where it is fixed at a position retracting to the land side on the girder 6 as shown by a solid line in FIG. The position of the center of gravity of the traveling crane 1 is set at the intermediate part of the leg part 5.
本第一実施例の場合、前記重心移行手段12は、前記走行クレーン1の機械室9を前記脚部5の走行方向と直角方向へ移動自在に配設することによって構成してある。   In the case of the first embodiment, the center-of-gravity transition means 12 is configured by disposing the machine room 9 of the traveling crane 1 so as to be movable in a direction perpendicular to the traveling direction of the legs 5.
前記機械室9を重心移行手段12とした場合、例えば、図2(a)に示す如く、前記ガーダ6の上面に、前記脚部5の走行方向と直角方向へ延びるガイドレール13を設け、該ガイドレール13上を転動する重心移行用車輪14を機械室9の底部に取り付け、図2(b)に示す如く、前記重心移行用車輪14に、減速機15aが一体化されたギヤードモータ15を駆動装置として取り付けるようにすれば、該ギヤードモータ15を回転駆動することにより、前記機械室9を脚部5の走行方向と直角方向へ移動させることができる。   When the machine room 9 is the center-of-gravity transition means 12, for example, as shown in FIG. 2 (a), a guide rail 13 extending in a direction perpendicular to the traveling direction of the leg 5 is provided on the upper surface of the girder 6, A center of gravity shifting wheel 14 that rolls on the guide rail 13 is attached to the bottom of the machine room 9, and as shown in FIG. 2 (b), a geared motor 15 in which a reduction gear 15a is integrated with the center of gravity shifting wheel 14. Is attached as a drive device, the machine room 9 can be moved in a direction perpendicular to the traveling direction of the legs 5 by rotationally driving the geared motor 15.
更に、前記機械室9は単に移動させるだけではなく、所定位置(走行クレーン1の運転時に陸側へ後退させる位置と走行クレーン1の運転休止時に海側へ前進させる位置)に固定する必要があるため、前記機械室9の底部には、図2(c)に示す如く、位置決め固定用のアンカー16を取り付けてある。該アンカー16は、前記機械室9の底部に固着されたブラケット17に、上下方向へ延びる短冊状金具18をリンクレバー19の押し下げ・引き上げ動作と連動させて昇降自在に設けてなる構成を有し、一方、前記ガーダ6上の機械室9を固定すべき位置に凹溝20を凹設し、該凹溝20内に基礎金具21を埋設し、前記短冊状金具18が凹溝20の上方に位置するよう前記機械室9を移動させ、前記短冊状金具18をリンクレバー19の引き上げ動作により下降させて凹溝20内に挿入した状態で、前記基礎金具21に穿設された孔21aと、前記短冊状金具18に穿設された孔18aとに連結ピン22を嵌入することにより、前記機械室9を前記所定位置に固定できるようにしてある。   Furthermore, the machine room 9 needs to be fixed at a predetermined position (a position where the traveling crane 1 is retracted to the land side when the traveling crane 1 is operated and a position where the traveling crane 1 is advanced toward the sea side when the operation is stopped). Therefore, an anchor 16 for positioning and fixing is attached to the bottom of the machine room 9 as shown in FIG. The anchor 16 has a configuration in which a bracket 17 fixed to the bottom of the machine room 9 is provided with a strip-shaped metal fitting 18 extending in the vertical direction so as to be movable up and down in conjunction with the push-down / pull-up operation of the link lever 19. On the other hand, a concave groove 20 is provided at a position where the machine room 9 on the girder 6 is to be fixed, a base metal fitting 21 is embedded in the concave groove 20, and the strip-shaped metal fitting 18 is disposed above the concave groove 20. The machine chamber 9 is moved so as to be positioned, and the strip-shaped metal fitting 18 is lowered by the pulling operation of the link lever 19 and inserted into the concave groove 20, and a hole 21a formed in the basic metal fitting 21 is formed. The machine room 9 can be fixed at the predetermined position by fitting a connecting pin 22 into a hole 18a formed in the strip-shaped metal fitting 18.
次に、上記第一実施例の作用を説明する。   Next, the operation of the first embodiment will be described.
先ず、走行クレーン1の通常の運転時、ブーム7は、図1の実線で示す如く、ガーダ6の先端部から海側へ向け張り出すように配設されていると共に、重心移行手段12を構成する機械室9は、図1の実線で示す如く、ガーダ6上の陸側へ後退する位置に固定されており、走行方向と直角方向へ離間配置される脚部5の中間部に走行クレーン1の重心位置が設定されている。この状態で、非常に大きな地震が起きたとしても、クレーンの脚部5が交互に浮き上がるように応答する、いわゆるロッキング現象が抑制され、浮き上がった側の脚部5が着地する際に元の位置に戻らずに少し内側若しくは外側にずれるようなことが避けられ、その結果、車輪4が走行レール3から離脱する心配がなくなる。   First, during normal operation of the traveling crane 1, the boom 7 is disposed so as to project from the tip of the girder 6 toward the sea as shown by the solid line in FIG. As shown by the solid line in FIG. 1, the machine room 9 is fixed at a position retreating to the land side on the girder 6, and the traveling crane 1 is disposed at an intermediate portion of the leg 5 that is spaced apart in the direction perpendicular to the traveling direction. The position of the center of gravity is set. In this state, even if a very large earthquake occurs, a so-called rocking phenomenon in which the legs 5 of the crane are alternately lifted is suppressed, and the original position when the lifted legs 5 land. It is possible to avoid a slight shift to the inside or the outside without returning to the position, and as a result, there is no fear that the wheel 4 is detached from the traveling rail 3.
これに対し、前記走行クレーン1が運転休止時にブーム7を、図1の仮想線で示す如く、起立させた場合、重心移行手段12を構成する機械室9は、図1の仮想線で示す如く、ガーダ6上の海側へ前進する位置に移動させる。   On the other hand, when the traveling crane 1 stands up as shown by the phantom line in FIG. 1 when the traveling crane 1 is not operating, the machine room 9 constituting the center-of-gravity transition means 12 is shown by the phantom line in FIG. , Move to the position on the girder 6 to advance to the sea side.
ここで、前記機械室9を移動させる際には、図2(c)の仮想線で示す如く、リンクレバー19を押し下げて短冊状金具18を上昇させた状態で、図2(b)に示すギヤードモータ15を前進方向へ回転駆動すると、重心移行用車輪14がガイドレール13上を転動し、前記機械室9が脚部5の走行方向と直角方向海側へ移動し、前記短冊状金具18が凹溝20の上方に位置したら、前記ギヤードモータ15の回転駆動を停止し、該短冊状金具18をリンクレバー19の引き上げ動作により下降させて凹溝20内に挿入した状態で、前記基礎金具21に穿設された孔21aと、前記短冊状金具18に穿設された孔18aとに連結ピン22を嵌入すると、前記機械室9がガーダ6上の海側へ前進する位置に固定される。   Here, when the machine room 9 is moved, as shown by the phantom line in FIG. 2 (c), the link lever 19 is pushed down to raise the strip-shaped metal fitting 18 as shown in FIG. 2 (b). When the geared motor 15 is rotationally driven in the forward direction, the center-of-gravity transition wheel 14 rolls on the guide rail 13, the machine room 9 moves to the sea side perpendicular to the traveling direction of the legs 5, and the strip-shaped bracket When 18 is positioned above the concave groove 20, the drive of the geared motor 15 is stopped, and the base 18 is inserted into the concave groove 20 by lowering the strip-shaped metal fitting 18 by lifting the link lever 19. When the connecting pin 22 is inserted into the hole 21a drilled in the metal fitting 21 and the hole 18a drilled in the strip-shaped metal fitting 18, the machine chamber 9 is fixed at a position to advance to the sea side on the girder 6. The
これにより、運転休止時におけるブーム7の起立動作に伴う走行クレーン1の重心位置変動が打ち消され、走行方向と直角方向へ離間配置される脚部5の中間部に走行クレーン1の重心位置を移行させることが可能となるため、この状態で、非常に大きな地震が起きたとしても、走行方向と直角方向へ離間配置される脚部5のうちブーム7の枢着点Oから遠い側、即ち陸側の脚部5寄りにクレーンの重心位置は移動していないことから、地震の加振力により、走行方向と直角方向へ離間配置される脚部5のうちブーム7の枢着点Oに近い側、即ち海側の脚部5が浮き上がりにくくなり、クレーンの脚部5が左右交互に浮き上がるように応答するロッキング現象が抑制され、前述と同様、浮き上がった側の脚部5が着地する際に元の位置に戻らずに少し内側若しくは外側にずれるようなことが避けられ、その結果、車輪4が走行レール3から離脱する心配がなくなる。   Thereby, the fluctuation of the gravity center position of the traveling crane 1 due to the standing operation of the boom 7 during the operation stop is canceled, and the gravity center position of the traveling crane 1 is transferred to an intermediate portion of the leg portion 5 that is spaced apart from the traveling direction at right angles. Therefore, even if a very large earthquake occurs in this state, the side of the leg 5 that is spaced apart in the direction perpendicular to the traveling direction away from the pivot point O of the boom 7, that is, the land The position of the center of gravity of the crane does not move closer to the leg 5 on the side, so that it is close to the pivot point O of the boom 7 among the legs 5 that are spaced apart in the direction perpendicular to the traveling direction by the excitation force of the earthquake. Side, that is, the sea-side leg 5 is less likely to be lifted, and the rocking phenomenon in which the crane's leg 5 is lifted alternately left and right is suppressed. Return to the original position To be avoided things like a little shifted to the inside or outside, as a result, concern is no longer the wheels 4 is released from the running rail 3.
尚、前記走行方向と直角方向へ離間配置される脚部5の中間部に走行クレーン1の重心位置が設定されるということは、運転休止時において、陸側の脚部5における車輪4と、海側の脚部5における車輪4とに均等に荷重が作用することを意味し、陸側の脚部5における車輪4のみに荷重が集中せず、走行クレーン1並びに岸壁2に敷設される走行レール3双方にとって好ましいと言える。   It should be noted that the center of gravity of the traveling crane 1 is set at the intermediate portion of the leg portion 5 that is spaced apart in the direction perpendicular to the traveling direction means that the wheel 4 on the land-side leg portion 5 during operation stop, This means that the load is applied evenly to the wheels 4 on the sea-side legs 5, and the load is not concentrated only on the wheels 4 on the land-side legs 5, and the traveling crane 1 and the quay 2 are laid. It can be said that it is preferable for both rails 3.
こうして、ブーム7を起立させた状態で大地震が発生したとしても、脚部5が浮き上がるように応答するロッキング現象を抑止することができ、被害を最小限に抑え得る。   Thus, even if a large earthquake occurs with the boom 7 raised, the rocking phenomenon that responds so that the legs 5 are lifted can be suppressed, and damage can be minimized.
図3(a)及び図3(b)は本発明の走行クレーンの免震支持装置の第一実施例における重心移行手段12としての機械室9の駆動系の他の例を示す図であって、前記ガーダ6の上面に、前記脚部5の走行方向と直角方向へ延びるガイドレール13を設け、該ガイドレール13上を転動する重心移行用車輪14を機械室9の底部に取り付け、ガーダ6上に図示していないブラケットを介して第一ウインチ23と第二ウインチ24とを、それらの回転軸が前記ガイドレール13と直交する水平方向へ延びるよう配設し、前記第一ウインチ23から繰り出される第一ワイヤロープ23aの端部を機械室9の前面(海側の面)に接続し、第二ウインチ24から繰り出される第二ワイヤロープ24aを機械室9の底部を貫通させ、ガーダ6上に配設されるシーブ25,26に掛け回し、該第二ワイヤロープ24aの端部を機械室9の背面(陸側の面)に接続し、前記重心移行用車輪14には、ブレーキ(図示せず)を取り付けるようにしたものである。   FIGS. 3A and 3B are diagrams showing another example of the drive system of the machine room 9 as the center-of-gravity shifting means 12 in the first embodiment of the seismic isolation support device for a traveling crane of the present invention. A guide rail 13 extending in a direction perpendicular to the traveling direction of the leg 5 is provided on the upper surface of the girder 6, and a center-of-gravity transition wheel 14 that rolls on the guide rail 13 is attached to the bottom of the machine room 9. 6, a first winch 23 and a second winch 24 are arranged via a bracket (not shown) so that their rotational axes extend in a horizontal direction perpendicular to the guide rail 13. The end of the first wire rope 23a to be fed is connected to the front surface (the surface on the sea side) of the machine room 9, and the second wire rope 24a to be fed from the second winch 24 is passed through the bottom of the machine room 9 to Arranged on The end of the second wire rope 24a is connected to the back surface (land side surface) of the machine room 9, and a brake (not shown) is attached to the wheel 14 for shifting the center of gravity. It is intended to be attached.
図3に示す例の場合、重心移行用車輪14のブレーキ(図示せず)を解除した状態で、第一ウインチ23によって第一ワイヤロープ23aを巻き取りつつ、第二ウインチ24によって第二ワイヤロープ24aを繰り出すと、機械室9がガイドレール13に沿って脚部5の走行方向と直角方向海側へ移動し、所定位置で前記重心移行用車輪14のブレーキ(図示せず)を作動させると、前記機械室9がガーダ6上の海側へ前進する位置に固定される。   In the case of the example shown in FIG. 3, the first wire rope 23 a is wound up by the first winch 23 and the second wire rope 24 is wound up by the second winch 24 in a state where the brake (not shown) of the wheel 14 for shifting the center of gravity is released. When the machine 24 is extended, the machine room 9 moves along the guide rail 13 to the sea side in a direction perpendicular to the traveling direction of the legs 5 and operates a brake (not shown) of the wheel 14 for shifting the center of gravity at a predetermined position. The machine room 9 is fixed to a position on the girder 6 that advances to the sea side.
又、重心移行用車輪14のブレーキ(図示せず)を解除した状態で、前述とは逆に、第一ウインチ23によって第一ワイヤロープ23aを繰り出しつつ、第二ウインチ24によって第二ワイヤロープ24aを巻き取ると、機械室9がガイドレール13に沿って脚部5の走行方向と直角方向陸側へ移動し、所定位置で前記重心移行用車輪14のブレーキ(図示せず)を作動させると、前記機械室9がガーダ6上の陸側へ後退する位置に固定される。   In the state where the brake (not shown) of the wheel 14 for shifting the center of gravity is released, the first wire rope 23a is fed out by the first winch 23 and the second wire rope 24a is drawn by the second winch 24, contrary to the above. When the machine room 9 moves to the land side perpendicular to the traveling direction of the legs 5 along the guide rail 13, and the brake (not shown) of the wheel 14 for shifting the center of gravity is operated at a predetermined position. The machine room 9 is fixed at a position on the girder 6 that moves backward to the land side.
尚、図3に示す例において、前記重心移行用車輪14にブレーキを取り付ける代わりに、図2(c)に示すようなアンカー16を機械室9の底部に取り付けても良い。又、図2に示す例において、前記機械室9の底部にアンカー16を取り付ける代わりに、前記重心移行用車輪14にブレーキを取り付けることもできる。   In the example shown in FIG. 3, an anchor 16 as shown in FIG. 2C may be attached to the bottom of the machine room 9 instead of attaching a brake to the wheel for shifting the center of gravity 14. In the example shown in FIG. 2, a brake can be attached to the center-of-gravity transition wheel 14 instead of attaching the anchor 16 to the bottom of the machine room 9.
図4は本発明の走行クレーンの免震支持装置の第二実施例であって、図中、図1と同一の符号を付した部分は同一物を表わしており、基本的な構成は図1に示すものと同様であるが、本第二実施例の特徴とするところは、図4に示す如く、機械室9を、固定配置される第一機械室9aと、脚部5の走行方向と直角方向へ移動自在に配設される第二機械室9bとに分割し、該第二機械室9bによって重心移行手段12を構成した点にある。   FIG. 4 shows a second embodiment of the seismic isolation support device for a traveling crane according to the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same parts, and the basic configuration is shown in FIG. However, the second embodiment is characterized in that the machine room 9 includes a first machine room 9a that is fixedly arranged, and a traveling direction of the legs 5 as shown in FIG. The second machine chamber 9b is arranged so as to be movable in a perpendicular direction, and the center of gravity shifting means 12 is constituted by the second machine chamber 9b.
前記第二機械室9bの内部には、ブーム7の起伏装置27を設置してあるが、その他の電気品等を設置することもできる。   Although the hoisting device 27 for the boom 7 is installed inside the second machine room 9b, other electrical equipment and the like can also be installed.
又、前記第二機械室9bを脚部5の走行方向と直角方向へ移動させるための駆動系は、図2や図3に示すものと同様な構造を採用すれば良い。   Further, the drive system for moving the second machine chamber 9b in the direction perpendicular to the traveling direction of the legs 5 may adopt a structure similar to that shown in FIGS.
図4に示す第二実施例のように構成すると、図1に示す第一実施例の場合と同様、ブーム7をガーダ6の先端部から海側へ向け張り出すように配設した状態、或いはブーム7を起立させた状態で大地震が発生したとしても、脚部5が浮き上がるように応答するロッキング現象を抑止することができ、被害を最小限に抑え得ることに加え、前記機械室9全体を移動させることが構造上困難となる場合に有効となる。   When configured as in the second embodiment shown in FIG. 4, as in the case of the first embodiment shown in FIG. 1, the boom 7 is disposed so as to project from the tip of the girder 6 toward the sea, or Even if a large earthquake occurs with the boom 7 raised, the rocking phenomenon that responds so that the legs 5 are lifted can be suppressed, and damage can be minimized. This is effective when it is difficult to move the structure.
因みに、陸側の脚部5と海側の脚部5とのスパンが約30[m]程度となる規模の走行クレーン1において、ブーム7を起立させた際の走行クレーン1の重心位置を海側の脚部5からの水平距離として表し、図4に示す第二機械室9bの重量を約90[t]として該第二機械室9bを最大限海側へ移動させた場合(図4の仮想線を参照)、本発明者等の試算では、前記機械室9全体が固定配置される従来の走行クレーン1と比較して、図4に示す第二実施例のように構成した走行クレーン1の重心位置は約10[%]海側へ移行可能となることが確認された。   Incidentally, in the traveling crane 1 of a scale in which the span between the land-side leg 5 and the sea-side leg 5 is about 30 [m], the center of gravity position of the traveling crane 1 when the boom 7 is erected is When the weight of the second machine room 9b shown in FIG. 4 is about 90 [t] and the second machine room 9b is moved as far as possible to the sea side (see FIG. 4). In comparison with the conventional traveling crane 1 in which the entire machine room 9 is fixedly arranged, the traveling crane 1 configured as in the second embodiment shown in FIG. It has been confirmed that the center of gravity of the sea can move to the sea side by about 10%.
又、前述の例では、重心移行手段12として既存の機械室9を利用したが、別途、質量を準備して重心移行手段12とすることも可能である。更に又、前記質量の移動は、ガーダ6上でも良いし、例えば水平材(図示せず)の上でも良い。   In the above-described example, the existing machine room 9 is used as the center-of-gravity shifting means 12, but it is also possible to prepare the center-of-gravity shifting means 12 by separately preparing a mass. Furthermore, the movement of the mass may be on the girder 6 or on a horizontal member (not shown), for example.
尚、本発明の走行クレーンの免震支持装置は、上述の実施例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   The seismic isolation support device for a traveling crane of the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the scope of the present invention.
1 走行クレーン
3 走行レール
4 車輪
5 脚部
6 ガーダ
7 ブーム
9 機械室
9a 第一機械室
9b 第二機械室
12 重心移行手段
O 枢着点
DESCRIPTION OF SYMBOLS 1 Traveling crane 3 Traveling rail 4 Wheel 5 Leg part 6 Girder 7 Boom 9 Machine room 9a 1st machine room 9b 2nd machine room 12 Center-of-gravity transition means O Pivoting point

Claims (4)

  1. 走行可能で且つ走行方向並びに該走行方向と直角方向へ離間配置される脚部の上方に、該脚部の走行方向と直角方向へ延びるガーダと、該ガーダの先端部に枢着され且つ運転時はガーダの先端部から張り出すように配設されるブームとが設けられ、該ブームを運転休止時は枢着点を中心に上方へ回動させて起立させる走行クレーンの免震支持装置において、
    走行クレーンの重心位置を前記走行方向と直角方向へ離間配置される脚部の中間部に移行させる重心移行手段を備えたことを特徴とする走行クレーンの免震支持装置。
    A girder extending in a direction perpendicular to the traveling direction of the leg, and a girder extending in a direction perpendicular to the traveling direction of the leg, and being pivotally attached to the tip of the girder and being operated when driving. Is provided with a boom arranged so as to protrude from the tip of the girder, and when the operation is suspended, the boom is pivoted upward about the pivot point to stand up,
    A seismic isolation support device for a traveling crane, comprising gravity center shifting means for shifting the center of gravity position of the traveling crane to an intermediate portion of a leg portion spaced apart in a direction perpendicular to the traveling direction.
  2. 前記重心移行手段により、運転休止時における前記ブームの起立動作に伴う走行クレーンの重心位置変動を打ち消すよう構成した請求項1記載の走行クレーンの免震支持装置。   The seismic isolation support device for a traveling crane according to claim 1, wherein the center-of-gravity shifting means is configured to cancel the variation in the center of gravity position of the traveling crane accompanying the standing operation of the boom during operation suspension.
  3. 前記走行クレーンの機械室を前記脚部の走行方向と直角方向へ移動自在に配設することにより、前記重心移行手段を構成した請求項1又は2記載の走行クレーンの免震支持装置。   The seismic isolation support device for a traveling crane according to claim 1 or 2, wherein the center of gravity shifting means is configured by disposing a machine room of the traveling crane so as to be movable in a direction perpendicular to the traveling direction of the legs.
  4. 前記走行クレーンの機械室を、固定配置される第一機械室と、脚部の走行方向と直角方向へ移動自在に配設される第二機械室とに分割し、該第二機械室によって前記重心移行手段を構成した請求項1又は2記載の走行クレーンの免震支持装置。   The machine room of the traveling crane is divided into a first machine room that is fixedly arranged and a second machine room that is disposed so as to be movable in a direction perpendicular to the traveling direction of the legs. The seismic isolation support device for a traveling crane according to claim 1 or 2, wherein the center of gravity shifting means is configured.
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JP2015093743A (en) * 2013-11-11 2015-05-18 Ihi運搬機械株式会社 Crane wire vibration suppression device

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