JPH0630886Y2 - Fixed structure of tower erection crane - Google Patents
Fixed structure of tower erection craneInfo
- Publication number
- JPH0630886Y2 JPH0630886Y2 JP3286688U JP3286688U JPH0630886Y2 JP H0630886 Y2 JPH0630886 Y2 JP H0630886Y2 JP 3286688 U JP3286688 U JP 3286688U JP 3286688 U JP3286688 U JP 3286688U JP H0630886 Y2 JPH0630886 Y2 JP H0630886Y2
- Authority
- JP
- Japan
- Prior art keywords
- load
- rod
- crane
- horizontal
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Bridges Or Land Bridges (AREA)
- Jib Cranes (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は塔架設用クレーンの固定構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fixed structure for a tower erection crane.
従来、ブーム旋回式塔架設用クレーン（以下、クレーン
という）を搭状構造物の側壁部に固定支持するのに、ク
レーンの旋回台を回動自在に支持する固定フレームの側
壁部に対向する四隅の部分及びこれに対応する側壁部の
四隅の部分に夫々連結部を設け、上記４箇所の連結部で
クレーンを搭状構造物に固定支持する構造のものが一般
的である。Conventionally, a boom swing tower erection crane (hereinafter referred to as a crane) is fixedly supported on a side wall portion of a tower structure, and four corners facing a side wall portion of a fixed frame that rotatably supports a swivel base of the crane. In general, a connecting portion is provided at each of the four portions and the four corner portions of the side wall portion corresponding thereto, and the crane is fixedly supported on the board-like structure by the four connecting portions.
上記４箇所の各連結部は夫々クレーンから作用する荷重
に含まれる鉛直方向荷重（重力作用方向の荷重）と、水
平方向荷重（鉛直方向荷重と直交し且つ搭状構造物の側
壁部に平行な方向の荷重）と、面外方向荷重（搭状構造
物の側壁部に略垂直方向の荷重）とを分担する。Each of the above-mentioned four connecting portions has a vertical load (load in the gravity acting direction) included in the load applied from the crane and a horizontal load (perpendicular to the vertical load and parallel to the side wall of the mounting structure). Direction load) and an out-of-plane direction load (a load in a direction substantially perpendicular to the side wall of the column-shaped structure).
従来のクレーンの固定構造においては、上記４箇所の連
結部のうち上部側の両隅部の２箇所の連結部において上
記３方向の荷重を分担支持し、下部側の両隅部の２箇所
の連結部において上記３方向の荷重のうち水平方向荷重
と面外方向荷重の２方向の荷重を分担支持する構造とな
っている。In the conventional fixing structure of the crane, among the above-mentioned four connecting portions, the two connecting portions at both corners on the upper side share and support the loads in the above three directions, and the two connecting portions at both corners on the lower side are supported. The connecting portion has a structure in which the load in the two directions of the horizontal load and the out-of-plane load is shared among the loads in the three directions.
従来のクレーンの固定構想においては、固定支持された
クレーンから各連結部に作用する荷重のうち、最も大き
な荷重を占めるクレーンの自重とクレーンの吊荷の重量
からなる静的な鉛直方向荷重を分担支持する上部側の隅
部に配設された２箇所の連結部で、残りの２方向の水平
方向荷重と面外方向荷重も分担支持する構造となってい
るために、上部側の連結部の支持構造が大型化するとい
う問題がある。In the conventional fixed crane concept, the static vertical load, which consists of the weight of the crane that occupies the largest load and the weight of the suspended load of the crane, is shared among the loads that act on each connection from the fixedly supported crane. The two connecting portions arranged at the corners on the upper side for supporting share and support the remaining two-direction horizontal load and the out-of-plane load. There is a problem that the support structure becomes large.
即ち、荷物を吊下げた状態でブームを旋回したとき、特
にブームが側方へ大きく張出した位置まで旋回したとき
に、連結部には側壁部に略垂直な方向（面外方向）の軸
心回りにブームのレバー比で増大された大きな回転モー
メントによる動的な荷重が作用するが、この動的な荷重
は上部と下部の各連結部に作用し、上部と下部の各連結
部の水平方向荷重の支持構造と、上部の連結部の鉛直方
向荷重の支持構造とによって分担支持されることにな
る。従って、上部側の連結部には静的な鉛直方向荷重と
この回転モーメントによって生じる動的な水平方向荷重
と鉛直方向荷重とが重畳して作用し、これらの両荷重を
支持する構造となっているのでその連結部の構造がかな
り大型化する問題がある。That is, when the boom is swung while the load is suspended, especially when the boom is swung to a position in which the boom is greatly extended to the side, the connecting portion has an axial center in a direction substantially perpendicular to the side wall (out-of-plane direction). Around the boom, the dynamic load due to the large rotation moment increased by the lever ratio acts on the upper and lower joints, and the horizontal direction of the upper and lower joints. The load supporting structure and the vertical load supporting structure of the upper connecting portion share and support the load. Therefore, the static vertical load and the dynamic horizontal load and vertical load generated by this rotation moment act on the connecting portion on the upper side in a superimposed manner to form a structure for supporting both of these loads. However, there is a problem that the structure of the connecting portion becomes considerably large.
即ち、動的な水平・鉛直方向荷重はブームの旋回角度及
び旋回方向等により大きく変動し、上部の両隅部の各連
結部に等分に作用しない関係上、荷重が大きく変動する
ために両隅の２箇所で支持する構造であっても各連結部
に作用する最大荷重をかなり大きな値に設定しなければ
ならないという問題がある。That is, the dynamic horizontal / vertical load fluctuates greatly depending on the boom's turning angle, turning direction, etc., and because the load does not act equally on each connecting part at both upper corners, the load fluctuates greatly. Even if the structure is supported at two corners, there is a problem that the maximum load acting on each connecting portion must be set to a considerably large value.
本考案に係る塔架設用クレーンの固定構造は、搭状構造
物の側壁部に複数の連結部によりブーム旋回式塔架設用
クレーンを固定支持する構造において、塔架設用クレー
ンの固定フレームの上部及びこれに対応する上記側壁部
の部分に３箇所の連結部を設け、上記固定フレームの下
部及びこれに対応する上記側壁部の部分に少なくとも１
箇所の連結部を設け、上記上部の３箇所の連結部のうち
の中央の連結部は、鉛直方向荷重と上記側壁部と平行な
水平方向荷重を分担するように構成されるとともに、残
りの２箇所の連結部は、上記側壁部に略垂直な方向の荷
重（以下、面外方向荷重という）のみを分担するように
構成され、上記下部の少なくとも１箇所の連結部は少な
くとも上記側壁部と平行な水平方向荷重を分担するよう
に構成されたものである。The tower erection crane fixing structure according to the present invention has a structure in which a boom swing type tower erection crane is fixedly supported by a plurality of connecting portions on a side wall portion of a tower structure, and an upper portion of a fixed frame of the tower erection crane and Three connecting portions are provided on the side wall portion corresponding to this, and at least one connecting portion is provided on the lower portion of the fixed frame and the corresponding side wall portion.
A connecting portion is provided at a place, and the central connecting portion among the above three connecting portions is configured to share the vertical load and the horizontal load parallel to the side wall portion, and the remaining two connecting portions. The connecting portion of the portion is configured to share only a load in a direction substantially perpendicular to the side wall portion (hereinafter, referred to as an out-of-plane direction load), and at least one connecting portion of the lower portion is at least parallel to the side wall portion. It is configured to share a large horizontal load.
本考案に係る塔架設用クレーンの固定構造においては、
上部の３箇所の連結部のうちの中央の連結部で鉛直方向
荷重と側壁部と平行な水平方向荷重が分担支持され、残
りの２箇所の連結部で面外方向荷重が分担支持され、さ
らに下部の少なくとも１つの連結部で側壁部と平行な水
平方向荷重が分担支持されるので、クレーンの自重並び
に吊荷の重量からなる静的な鉛直方向荷重を分担する上
部中央部即ちブームの旋回中心上の連結部にはブームが
施回した場合の面外方向軸回りの回転モーメントによる
動的な鉛直方向荷重が全く作用せず、上記回転モーメン
トによる動的な水平方向荷重は水平方向荷重を分担する
上部中央部の連結部と下部の連結部で支持されることに
なる。In the fixed structure of the tower erection crane according to the present invention,
The vertical load and the horizontal load parallel to the side wall are shared and supported by the central connecting part of the upper three connecting parts, and the out-of-plane load is shared and supported by the remaining two connecting parts. Since the horizontal load parallel to the side wall is shared and supported by at least one connecting part of the lower part, the central part of the upper part that bears the static vertical load composed of the weight of the crane and the weight of the suspended load, that is, the swing center of the boom No dynamic vertical load is applied to the upper connection part due to the rotation moment around the out-of-plane direction axis when the boom is rotated, and the dynamic horizontal load due to the above rotation moment shares the horizontal load. It will be supported by the connecting part at the center of the upper part and the connecting part at the bottom.
従って、上部中央部の連結部には、クレーンの自重と吊
荷の重量からなる静的な鉛直方向荷重と、上記回転モー
メントにより生じる動的な水平方向荷重とが同時に作用
することになるが、固定フレームの高さはその幅に比較
して非常に大きく、上下の連結部間のスパンが非常に大
きいので上記動的水平方向荷重は非常に小さくなる。Therefore, a static vertical load consisting of the weight of the crane and the weight of the suspended load, and a dynamic horizontal load generated by the rotation moment simultaneously act on the connecting portion of the upper center portion, The height of the fixed frame is very large compared to its width, and the span between the upper and lower connecting parts is very large, so that the dynamic horizontal load is very small.
従って、上記鉛直方向荷重と水平方向荷重の２方向荷重
を同時に分担支持する構造であってもその支持構造は比
較的小型の構造とすることが出来る。そして、上部の他
の２箇所の連結部は面外方向荷重のみを分担支持する構
造のため非常に小型の支持構造にすることが出来る。Therefore, even in the structure in which the two-direction loads of the vertical load and the horizontal load are simultaneously shared and supported, the support structure can be a relatively small structure. Further, since the other two connecting portions on the upper portion share and support only the out-of-plane direction load, a very small supporting structure can be obtained.
本考案に係る塔架設用クレーンの固定構造によれば、以
上説明したように、上部の３箇所の連結部のうちの中央
部の連結部で鉛直方向荷重と側壁部に平行な水平方向荷
重を分担させ、上部の他の２箇所の連結部で面外方向荷
重を分担させ、下部の少なくとも１箇所の連結部で少な
くとも側壁部に平行な水平方向荷重を分担させるように
構成して、連結部の荷重分担の機能を特定したので、ブ
ームの旋回に伴って大きく変動する面外方向軸心回りの
回転モーメントを、上部の中央部の連結部と下部の連結
部に作用する水平方向荷重で分担支持することが出来
る。従って、上部の２箇所の連結部に作用する最大荷重
を軽減してこれら連結部の構造を格段に小型化すること
が出来る。According to the fixing structure of the tower erection crane according to the present invention, as described above, the vertical load and the horizontal load parallel to the side wall are applied at the central connecting portion of the upper three connecting portions. The other two connecting portions of the upper portion are made to share the out-of-plane direction load, and the at least one connecting portion of the lower portion is made to share the horizontal load at least in parallel to the side wall portion. Since the function of load sharing is specified, the rotational moment around the out-of-plane axial center, which fluctuates greatly as the boom turns, is shared by the horizontal load acting on the upper middle connecting part and the lower connecting part. I can support you. Therefore, the maximum load acting on the upper two connecting portions can be reduced, and the structures of these connecting portions can be significantly downsized.
上部の中央部の連結部は全鉛直方向荷重を支持する構造
上他の連結部に較べて支持構造が大型化するものの、ブ
ームの旋回に伴って変動する上記動的な水平方向荷重
は、上下の連結部間のスパンが非常に大きいために格段
に小さくなりまた他の連結部の支持状態の影響を受ける
ことがなく最大荷重も一定的に作用するので比較的小型
の構造にすることが出来る。The connecting part in the central part of the upper part has a larger supporting structure compared to other connecting parts due to the structure that supports all vertical loads, but the dynamic horizontal load that fluctuates as the boom turns is Since the span between the connecting parts is extremely large, it is significantly small, and the maximum load is not affected by the supporting condition of other connecting parts, so the structure can be relatively small. .
以下、本考案の実施例について図面に基いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
本実施例は、ブーム旋回式クレーンを長大吊橋の塔体の
架設工事に用いるブーム旋回式塔架設用クレーン（以
下、クレーンという）を塔体に着脱自在に固定支持する
構造に本考案を適用したものである。In the present embodiment, the present invention is applied to a structure in which a boom swing type crane (hereinafter referred to as a crane) used for the construction work of a tower body of a long suspension bridge is detachably fixed to the tower body. It is a thing.
第１図に示すように、塔体Ｔは完成時に例えば３００ｍ
以上の高さとなるもので、塔体Ｔは所定高さ毎に輪切り
状に分割し更にそれを複数個に分割した分割ブロックＢ
Ｌを順々に上方に搭載し高力ボルトなどで固着すること
により架設される。尚、塔体Ｔは上方にいくのにつれて
外側面１が鉛直面から僅かに内方へ傾いている。As shown in FIG. 1, the tower body T is, for example, 300 m when completed.
The tower T is divided into a plurality of blocks at a predetermined height and further divided into a plurality of blocks B having the above height.
It is erected by sequentially mounting L on the upper side and fixing them with high-strength bolts or the like. The outer surface 1 of the tower body T is slightly inwardly inclined from the vertical surface as it goes upward.
上記塔体Ｔを架設するため、塔体Ｔの既架設部分の上部
の一外側面１には、せり上げガイドフレームを含む図示
外のせり上げ装置を介して塔体Ｔの上部へ順々にせり上
げられるクレーンＣＲが配設される。そして、クレーン
ＣＲによって地上から分割ブロックＢＬを吊揚げて塔体
Ｔの最上段の所定位置に搭載固定後、せり上げ装置によ
りガイドフレームとクレーンＣＲとを順次上方へせり上
げ、これを順次繰返して塔体１を上方へ順々に架設して
いくようになっている。尚、図示のように前後左右方向
を定義して以下説明する。In order to erect the tower body T, the one outer surface 1 of the already installed portion of the tower body T is sequentially advanced to the upper portion of the tower body T via a hoisting device (not shown) including a hoisting guide frame. A crane CR that can be raised is provided. Then, the divided block BL is hoisted from the ground by the crane CR, mounted and fixed at a predetermined position on the uppermost stage of the tower body T, and then the guide frame and the crane CR are sequentially lifted upward by the lifting device, and this is repeated sequentially. The tower body 1 is constructed so as to be sequentially erected upward. The front-rear direction and the left-right direction are defined as shown in the figure, and will be described below.
上記クレーンＣＲは平面視略三角形状の固定フレーム２
を備え、固定フレーム２は、左右両端部に鉛直方向に配
設された所定の長さを有する１対の支柱部２ｃと、両支
柱部２ｃ間に配設され外側面１に沿う３本の水平部２ａ
と、支柱部２ｃの上・中・下部後端面から後方へ斜めに
延びる左右１対の斜枠部２ｂとから成り、左右１対の斜
枠部２ｂの後端部には固定ポスト３が鉛直状に上・中・
下部３箇所で夫々接合されている。The crane CR is a fixed frame 2 having a substantially triangular shape in plan view.
The fixed frame 2 includes a pair of pillars 2c vertically arranged on both left and right ends and a pair of pillars 2c arranged between the pillars 2c along the outer surface 1. Horizontal part 2a
And a pair of left and right slant frame portions 2b diagonally extending rearward from the upper, middle, and lower rear end surfaces of the column portion 2c. The fixed post 3 is vertically installed at the rear end portions of the pair of left and right slant frame portions 2b. In the shape of
It is joined at each of the three lower parts.
上記固定ポスト３は鉛直方向に所定の長さを有する中空
厚肉円筒状の部材で、固定ポスト３内には厚肉パイプ状
の旋回軸（図示略）が同心状に回動自在に挿通状に配設
され、固定ポスト３の上端よりも上方位置で旋回軸の上
端には平面視略三角形状の厚肉の旋回台４が固着されて
いる。従って、旋回台４は旋回軸を介して固定ポスト３
に旋回自在に支承され、旋回台４に設けられた旋回駆動
装置（図示略）により左右両方向に所定の旋回角に亙っ
て旋回駆動される。The fixed post 3 is a hollow thick-walled cylindrical member having a predetermined length in the vertical direction, and a thick-walled pipe-shaped turning shaft (not shown) is concentrically rotatably inserted into the fixed post 3. And a thick swivel base 4 having a substantially triangular shape in plan view is fixed to the upper end of the swivel shaft at a position above the upper end of the fixed post 3. Therefore, the swivel base 4 is fixed to the fixed post 3 via the swivel shaft.
It is rotatably supported by the swivel base and is swung by a swivel drive device (not shown) provided on the swivel base 4 in both left and right directions over a predetermined swivel angle.
上記旋回台４の上面にはブーム５の左右１対の下端部が
水平支軸と枢支ブラケットとを介して回動自在に枢着さ
れ、ブーム５は起伏自在で旋回台４を中立位置にした状
態でブーム５は塔体１の方へ（平面視で前後方向に）向
いている。A pair of left and right lower ends of the boom 5 are pivotally attached to the upper surface of the swivel base 4 via a horizontal support shaft and a pivot bracket so that the boom 5 can be raised and lowered to bring the swivel base 4 to a neutral position. In this state, the boom 5 faces the tower body 1 (forward and backward in plan view).
上記中立位置にある旋回台４を前提として説明すると、
旋回台４の外端部から平面視略台形状の台枠６がブーム
張出し側と反対側へ所定長さ張出され、旋回台４と台枠
６とは一体的に固着されている。この台枠６は骨部材と
板部材とからなる強度部材で、旋回台４のブーム５の左
右側端部から台枠６の前側寄り部の上方にかけて斜めに
メインステイ７が配設され、メインステイ７の下端部は
旋回台４に固着され、また台枠６後端の左右端からメイ
ンステイ７の上端にかけて１対のアッパスティ８が斜め
に配設され、各アッパスティ８の下端は台枠６に固着さ
れている。Assuming that the swivel base 4 is in the neutral position,
An underframe 6 having a substantially trapezoidal shape in plan view is extended from the outer end portion of the swivel 4 to a side opposite to the boom overhanging side by a predetermined length, and the swivel 4 and the underframe 6 are integrally fixed. The underframe 6 is a strength member composed of a bone member and a plate member, and a main stay 7 is obliquely arranged from the left and right side ends of the boom 5 of the swivel base 4 to above the front side portion of the underframe 6. The lower end portion of the stay 7 is fixed to the swivel base 4, and a pair of uppasti 8 is obliquely arranged from the left and right ends of the rear end of the underframe 6 to the upper end of the main stay 7. Is stuck to.
更に、上記固定ポスト３の下端外に延びた旋回軸には大
径軸部材３ａが固着され、この大径軸部材３ａの左右両
側部と台枠６の後端部の左右両端下部とがテンション部
材としてのロワステイ９で連結されている。上記各ロワ
ステイ９の上下両端部は相手方部材の枢支ブラケットに
軸部材を介してヒンジ結合されている。Further, a large-diameter shaft member 3a is fixed to a swivel shaft extending outside the lower end of the fixed post 3, and both left and right side parts of the large-diameter shaft member 3a and lower left and right end parts of a rear end part of the underframe 6 are tensioned. They are connected by a lower stay 9 as a member. The upper and lower ends of each of the lower stays 9 are hinged to the pivot brackets of the mating member via shaft members.
上記台枠６のブーム５側部分には１対の補巻きウインチ
１０が設けられ、台枠６のブーム１９側後端部近くの部
分には１対の主巻きウインチ１１が設けられている。但
し、これらウインチ１０・１１を夫々駆動するためのモ
ータ（図示略）が台枠６の上面やその内部に設けられて
いる。また、ブーム５を起伏させる為のウインチ及びモ
ータについては既存のクレーンと同様なので図示及び説
明を省略してある。A pair of auxiliary winding winches 10 is provided on the boom 5 side of the underframe 6, and a pair of main winding winches 11 is provided on the underframe 6 near the boom 19 side rear end. However, motors (not shown) for driving the winches 10 and 11 are provided on the upper surface of the underframe 6 and inside thereof. A winch and a motor for hoisting the boom 5 are the same as those of the existing crane, and therefore illustration and description thereof are omitted.
上記主巻きウインチ１１から延びる２本のワイヤー１１
ａはメインステイ７とアッパスティ８の上端の滑車１２
及びブーム５の先端近くの滑車１３を経由して下方に延
び、そのワイヤー１１ａに主巻きフック１４が設けられ
ている。尚、符号１５・１６は補巻き用のフックであ
り、クレーンＣＲは従来と同様の構造のものであるの
で、各部の詳細な説明は省略し、以下、クレーンＣＲを
塔体Ｔの外側面１に固定するための固定構造について説
明する。Two wires 11 extending from the main winding winch 11
a is a pulley 12 at the upper end of the main stay 7 and the appasty 8.
Also, a main winding hook 14 is provided on the wire 11a of the boom 11 extending downward through a pulley 13 near the tip of the boom 5. Reference numerals 15 and 16 are auxiliary winding hooks, and since the crane CR has the same structure as the conventional one, detailed description of each part is omitted, and hereinafter, the crane CR is referred to as the outer surface 1 of the tower body T. The fixing structure for fixing to is explained.
この固定構造は、第２図及び第３図〜第８図に示すよう
に、クレーンＣＲを塔体Ｔの外側面１に固定指示する連
結部を６箇所配設する構造のもので、クレーンＣＲは、
外側面１の上端の柱幅中央に所定高のスパンを確保して
上下に夫々配設された各連結部Ｅ・Ｆと、連結部Ｅ及び
連結部Ｆの左右両側に夫々所定等間隔で略直線上に配設
された連結部Ａ・Ｂ及び連結部Ｃ・Ｄの合計６箇所の連
結部Ａ〜Ｆで固定指示される。As shown in FIG. 2 and FIG. 3 to FIG. 8, this fixing structure is a structure in which six connecting portions for fixing the crane CR to the outer surface 1 of the tower T are arranged, and the crane CR is provided. Is
Each of the connecting portions E and F arranged vertically with a span of a predetermined height secured in the center of the column width at the upper end of the outer side surface 1 and the left and right sides of the connecting portion E and the connecting portion F at substantially equal intervals. Fixing is instructed by the connecting portions A to B and the connecting portions C and D arranged in a straight line at a total of six connecting portions A to F.
上記連結部Ａ〜Ｆのうち、連結部Ａ〜Ｄにおいては外側
面１に略垂直な方向（以下、面外方向という）に作用す
る荷重を支持するように構成され、連結部Ｅにおいては
外側面１に平行で且つ水平な方向（以下、水平方向とい
う）に作用する荷重と鉛直方向に作用する荷重とを支持
するように構成され、連結部Ｆにおいては水平方向に作
用する荷重を支持するように構成されている。Of the connecting portions A to F, the connecting portions A to D are configured to support a load acting in a direction substantially perpendicular to the outer side surface 1 (hereinafter, referred to as an out-of-plane direction), and the connecting portion E is an outer portion. It is configured to support a load acting in a horizontal direction parallel to the side surface 1 (hereinafter, referred to as a horizontal direction) and a load acting in a vertical direction, and the connecting portion F supports a load acting in a horizontal direction. Is configured.
各連結部Ａ〜Ｆの位置に対応する塔体Ｔの外側面１上に
は連結ブラケット２０Ａ〜２０Ｆが夫々固着されるとと
もに、クレーンＣＲの固定フレーム２上の夫々の対応位
置には連結機構２１Ａ〜２１Ｆが夫々設けられている。The connecting brackets 20A to 20F are fixed to the outer surface 1 of the tower T corresponding to the positions of the connecting portions A to F, respectively, and the connecting mechanism 21A is provided at the corresponding position on the fixed frame 2 of the crane CR. 21F are provided respectively.
先ず、連結部Ａ〜Ｄに設けられた各連結ブラケット２０
Ａ〜２０Ｄは、第３・４・７・８図に示すように、夫々
が同様の構造で、各連結ブラケット２０Ａ〜２０Ｄに対
応する各連結機構２１Ａ〜２１Ｄも夫々が同様の構造と
なっているので、連結部Ａの連結ブラケット２０Ａ及び
連結機構２１Ａの構造について説明する。First, each connection bracket 20 provided in the connection parts A to D
As shown in FIGS. 3, 4, 7, and 8, A to 20D have the same structure, and the connecting mechanisms 21A to 21D corresponding to the connecting brackets 20A to 20D also have the same structure. Therefore, the structures of the connecting bracket 20A and the connecting mechanism 21A of the connecting portion A will be described.
連結ブラケット２０Ａは、外側面１上に固着され面外方
向に延びるように且つ左右に所定の間隙で並設された板
状の１対の連結板部２２を備え、各連結板２２は外側面
にボルトや溶接で固着されたベース２２ａに頑強に固着
されている。そして、各連結板２２の中央部には、水平
方向に所定の内径を有し且つ鉛直方向に亙って所定の長
さを有する長穴状の挿通孔２３が設けられている。The connecting bracket 20A is provided with a pair of plate-like connecting plate portions 22 fixed to the outer surface 1 and extending in the out-of-plane direction and arranged side by side at a predetermined gap. It is firmly fixed to the base 22a which is fixed by bolts or welding. An elongated hole-like insertion hole 23 having a predetermined inner diameter in the horizontal direction and a predetermined length in the vertical direction is provided at the center of each connecting plate 22.
連結機構２１Ａは、固定フレーム２の支柱部２ｃの上端
外周前部に接合され前方に向って水平に所定の長さで延
びるように設けられた支持アーム２４の前端部に１対の
油圧シリンダからなる作動部２５を左右水平方向向きに
装着してなり、作動部２５は油圧で左右双方に夫々水平
方向に同期して進退駆動する１対のロッド２６を有し、
左右の各ロッド２６の先端部には側面視所定の楕円形状
の連結ピン２７が同心状に突設されていて、作動部２５
を退入駆動して各ロッド２６を退入限度位置に固定した
状態（以下、解除状態という）で各連結ピン２７の先端
部が連結ブラケット２０Ａの左右の連結板２２の間に納
まるようになっていて、この解除状態から作動部２５を
進出駆動して各ロッド２６を進出限度位置まで駆動した
状態（以下、挿入状態という）で各連結ピン２７が各連
結板２２の挿通孔２３内に貫通状に挿入可能となってい
る。ここで、連結ピン２７の長軸径は挿通孔２３の内径
よりも所定量長く形成され、またその短軸径は挿通孔２
３の内径よりも所定量短く形成されていて、挿入状態に
おいては連結ピン２７の長軸側が鉛直方向向きになる姿
勢（以下、解放姿勢という）で挿通孔２３内に貫通状に
挿入可能となっている。The connecting mechanism 21A includes a pair of hydraulic cylinders at a front end portion of a support arm 24 which is joined to a front portion of an outer periphery of the upper end of the support column 2c of the fixed frame 2 and extends horizontally forward by a predetermined length. The operating part 25 is mounted in the horizontal direction in the left-right direction, and the operating part 25 has a pair of rods 26 that are hydraulically driven to advance and retreat in the horizontal direction on both the left and right sides, respectively.
A connecting pin 27 having a predetermined elliptical shape in a side view is concentrically provided at the tip of each of the left and right rods 26 so as to project from the operating portion 25.
When the rods 26 are driven in and out to fix each rod 26 in the retracted limit position (hereinafter referred to as a released state), the tip end of each connecting pin 27 is set between the left and right connecting plates 22 of the connecting bracket 20A. In this released state, each connecting pin 27 penetrates into the insertion hole 23 of each connecting plate 22 in a state in which the operating portion 25 is driven to advance and each rod 26 is driven to the advance limit position (hereinafter referred to as an inserted state). It can be inserted in a shape. Here, the major axis diameter of the connecting pin 27 is formed longer than the inner diameter of the insertion hole 23 by a predetermined amount, and the minor axis diameter thereof is the insertion hole 2.
It is formed to be shorter than the inner diameter of 3 by a predetermined amount, and in the insertion state, it can be inserted into the insertion hole 23 in a penetrating manner with the long axis side of the connecting pin 27 being in the vertical direction (hereinafter referred to as the releasing posture). ing.
上記連絡ピン２７の姿勢制御は支持アーム２４上にブラ
ケットを介して左右方向の水平な枢支ピンで前後方向向
きに揺動自在に枢支された油圧シリンダ２８と、油圧シ
リンダ２８のロッド２８ａの先端部にブラケットを介し
て左右両側に延びるように連結された連結ロッド２９
と、連結ロッド２９の両端部に夫々一端部がロッド２９
上を左右方向に移動自在に連結された板状の各レバー３
０によって行なわれ、各レバー３０の他端部は夫々各ロ
ッド２６の先端部に外嵌状に回動一体に連結されてい
て、油圧シリンダ２８を駆動してロッド２８ａが図中実
線で示す進出位置で連結ピン２７が解放姿勢となり、こ
の解放姿勢から油圧シリンダ２８を駆動してロッド２８
ａが図中仮想線で示す退入位置で連結ピン２７の長軸側
が略水平方向向きとなる姿勢（以下、支持姿勢という）
に姿勢変更されるようになっている。従って連結部Ａに
おいて連結ブラケット２０Ａに連結機構２１Ａを固定す
る場合、先ず連結機構２１Ａの作動部２５を解除状態に
して連結ブラケット２０Ａの各連結板２２間に作動部２
５を挿入し、次に連結ピン２７を解放姿勢にした状態で
作動部２５を挿入状態にし、さらに連結ピン２７を支持
姿勢にすることによって、連結ピン２７の外周面が挿通
孔２３内の前後の側面に当接した状態になって固定され
る。The attitude of the connecting pin 27 is controlled by a hydraulic cylinder 28 pivotally supported in the front-rear direction by a horizontal pivot pin in the left-right direction on a support arm 24 via a bracket, and a rod 28a of the hydraulic cylinder 28. A connecting rod 29 connected to the tip end portion via a bracket so as to extend to the left and right sides.
One end of each of the connecting rods 29 is connected to the rod 29.
Plate-shaped levers 3 movably connected to the left and right
0. The other end of each lever 30 is externally fitted and pivotally connected to the tip of each rod 26 to drive the hydraulic cylinder 28 so that the rod 28a moves forward as shown by the solid line in the figure. At the position, the connecting pin 27 takes the releasing posture, and from this releasing posture, the hydraulic cylinder 28 is driven to drive the rod 28.
The posture in which the major axis side of the connecting pin 27 is in a substantially horizontal direction when a is a retracted position indicated by a virtual line in the drawing (hereinafter, referred to as a supporting posture)
The attitude has been changed. Therefore, when fixing the coupling mechanism 21A to the coupling bracket 20A at the coupling portion A, first, the actuating portion 25 of the coupling mechanism 21A is released, and the actuating portion 2 is provided between the coupling plates 22 of the coupling bracket 20A.
5 is inserted, and then the actuating portion 25 is inserted with the connecting pin 27 in the releasing position, and the connecting pin 27 is placed in the supporting position. It is fixed by being in contact with the side surface of.
即ち、連結ブラケット２０Ａと連結機構２１Ａによっ
て、面外方向荷重の支持が行なわれる。尚、連結部Ｂ〜
Ｄの各連結ブラケット２０Ｂ〜２０Ｄ及び各連結機構２
１Ｂ〜２１Ｄも同様の構造であるので説明は省略する。That is, the connection bracket 20A and the connection mechanism 21A support the out-of-plane load. In addition, the connecting portion B to
D connecting brackets 20B to 20D and connecting mechanisms 2
Since 1B to 21D have the same structure, the description thereof will be omitted.
次に、連結部Ｅに設けられた連結ブラケット２０Ｅとこ
れに対応する連結機構２１Ｅについて第３図・第５図に
基いて説明する。Next, the connecting bracket 20E provided on the connecting portion E and the connecting mechanism 21E corresponding thereto will be described with reference to FIGS. 3 and 5.
連結ブラケット２０Ｅは、外側面１上に固着され外側面
１と平行に且つ外側面１と所定間隔を確保して配設され
た連結板３１を備え、連結板３１の両端部は１対のブラ
ケット３１ａに固着され、両ブラケット３１ａはボルト
や溶接により外側面１に固着されたベース３１ｂに頑強
に固着されている。The connecting bracket 20E includes a connecting plate 31 that is fixed to the outer side surface 1 and is arranged in parallel with the outer side surface 1 and at a predetermined distance from the outer side surface 1, and both ends of the connecting plate 31 are a pair of brackets. The brackets 31a are firmly fixed to the base 31b fixed to the outer surface 1 by bolts or welding.
上記連結板３１の前後両面中央部には補強板３２が付設
され、連結板３１及び補強板３２の中央部には鉛直方向
に所定の長さを有する挿通孔３３が貫通状に設けられ、
挿通孔３３は、その下半部が下端部に向って緩やかに縮
径する長穴状に設けられ、挿通孔３３の下端部には所定
の内径を有する支持部３３ａが形成されている。A reinforcing plate 32 is attached to the central portion of the front and rear surfaces of the connecting plate 31, and an insertion hole 33 having a predetermined length in the vertical direction is provided in the central portion of the connecting plate 31 and the reinforcing plate 32 in a penetrating manner.
The lower half of the insertion hole 33 is provided in the shape of an elongated hole whose diameter gradually decreases toward the lower end, and the lower end of the insertion hole 33 has a support portion 33a having a predetermined inner diameter.
連結機構２１Ｅは、固定フレーム２の上部の水平枠部２
ａの中央部に接合され前方に向って水平に所定の長さ延
びる支持アーム３４の前端部に油圧シリンダからなる作
動部３５を前後方向向きに水平に装着してなり、作動部
３５は油圧で前方に向って水平方向に進退駆動する連結
ロッド３６を有し、作動部３５を退入駆動して連結ロッ
ド３６を退入限度位置に固定した状態（以下、解除状態
という）で連結ロッド３６の先端部は連結板３１の挿通
孔３３の後方外部に位置し、この解除状態から作動部３
５を進出駆動して連結ロッド３６を進出限度位置まで駆
動した状態（以下、挿入状態という）で連結ロッド３６
の先端部を挿通孔３３ａ内に貫通状に挿入可能となって
いる。ここで、連結ロッド３６の外径は挿通孔３３の下
端部の支持部３３の内径と同径に設けられていて、クレ
ーンＣＲが、せり上げ装置によって鉛直上方へせり上げ
られたときに、クレーンＣＲが固定支持される所定の位
置Ｙ０（支持部３３ａで決定される高さ位置で以下、固
定位置という）よりも所定量だけ高い位置Ｙ１（以下、
挿入位置という）まで一端せり上げられる構造で、この
挿入位置Ｙ１において連結ロッド３６は挿通孔３３内の
第５図に実線で示す支持部３３ａよりも所定量高い位置
で挿入可能となっている。そして、せり上げ装置よって
クレーンＣＲが再び所期の固定位置Ｙ０まで下降される
ことによって連結ロッド３６は挿通孔３３の支持部３３
ａに嵌合して支持されるようになっている。従つて、連
結部Ｅにおいて連結ブラケット２０Ｅに連結機構２１Ｅ
を固定する場合、先ず連結機構２１Ｅの作動部３５を解
除状態にしてせり上げ装置によりクレーンＣＲを挿入位
置Ｙ１までせり上げ、次に作動部３５を挿入状態にした
後、せり上げ装置によりクレーンＣＲを固定位置Ｙ０ま
で下降させる。これによって連結ロッド３６は挿通孔３
３の支持部３３ａに嵌合されて固定される。The connecting mechanism 21E includes a horizontal frame portion 2 above the fixed frame 2.
An operating portion 35 formed of a hydraulic cylinder is horizontally mounted in the front-rear direction at the front end portion of a support arm 34 that is joined to the central portion of a and extends horizontally for a predetermined length toward the front. The connecting rod 36 has a connecting rod 36 that moves forward and backward in the horizontal direction toward the front, and drives the operating portion 35 to move in and out to fix the connecting rod 36 in the retracting limit position (hereinafter referred to as a released state). The tip portion is located outside the rear of the insertion hole 33 of the connecting plate 31, and from this released state, the operating portion 3 is released.
5 is moved forward to drive the connecting rod 36 to the advance limit position (hereinafter, referred to as an inserted state).
It is possible to insert the tip of the above into the insertion hole 33a in a penetrating manner. Here, the outer diameter of the connecting rod 36 is provided to be the same as the inner diameter of the support portion 33 at the lower end of the insertion hole 33, and when the crane CR is lifted vertically upward by the lifting device, A position Y 1 (hereinafter, referred to as a fixed position) which is higher than a predetermined position Y 0 at which CR is fixedly supported (a height position determined by the supporting portion 33a, hereinafter referred to as a fixed position).
The connecting rod 36 can be inserted into the insertion hole 33 at a position higher by a predetermined amount than the supporting portion 33a shown by the solid line in FIG. 5 at the insertion position Y 1 . . Then, the crane CR is again lowered to the desired fixed position Y 0 by the lifting device, so that the connecting rod 36 causes the support portion 33 of the insertion hole 33.
It is adapted to be fitted in and supported by a. Therefore, the connecting mechanism 21E is connected to the connecting bracket 20E at the connecting portion E.
When fixing the, elevated cranes CR to the insertion position Y 1 First, the operation portion 35 of the connecting mechanism 21E to the release state by elevated device, then after the operation portion 35 in the insertion state, the crane by elevated device The CR is lowered to the fixed position Y 0 . As a result, the connecting rod 36 is inserted into the insertion hole 3
3 is fitted and fixed to the supporting portion 33a.
即ち、連結ブラケット２０Ｅと連結機構２１Ｅによって
水平方向と鉛直後方の２方向の支持が行なわれる。That is, the connecting bracket 20E and the connecting mechanism 21E support the horizontal direction and the direction immediately after the lead.
次に、連結部Ｆに設けられた連結ブラケット２０Ｆとこ
れに対応する連結機構２１Ｆについて第４図・第６図に
基いて説明する。Next, the connecting bracket 20F provided on the connecting portion F and the connecting mechanism 21F corresponding thereto will be described with reference to FIGS. 4 and 6.
連結ブラケット２０Ｆは、外側面１上に固着され外側面
１と平行に且つ外側面１と所定間隔を確保して配設され
た連結板３７を備え、連結板３７の両端部はブラケット
３７ａに固着され、１対のブラケット３７ａは外側面１
にボルトや溶接で固着されたベース３７ｂに頑強に固着
されている。The connecting bracket 20F includes a connecting plate 37 that is fixed to the outer surface 1 and is arranged in parallel to the outer surface 1 and at a predetermined distance from the outer surface 1. Both ends of the connecting plate 37 are fixed to the bracket 37a. And the pair of brackets 37a has an outer surface 1
It is firmly fixed to the base 37b fixed by bolts or welding.
上記連結板３７の前後両面中央部には補強板３８が付設
され、連結板３７及び補強板３８の中央部には鉛直方向
に所定の長さと内径を有する長穴状の挿通孔３９が貫通
状に設けられている。A reinforcing plate 38 is attached to the central portion of the front and rear surfaces of the connecting plate 37, and an elongated hole-like insertion hole 39 having a predetermined length and inner diameter in the vertical direction is formed through the central portions of the connecting plate 37 and the reinforcing plate 38. It is provided in.
連結機構２１Ｆは、固定フレーム２の下部の水平枠部２
ａの中央部に接合され前方に向って水平に所定の長さ延
びる支持アーム４０の前端部にダブルロッドタイプの油
圧シリンダからなる作動部４１を前後方向向きに水平に
装着してなり、作動部４１は油圧で前方に向って水平に
進退駆動されるロッド４２を有し、ロッド４２の前端部
には正面視所定の楕円形状の連結ピン４３が同心状に突
設されていて、作動部４１を退入駆動してロッド４２を
退入限度位置に固定した状態（以下、解除状態という）
で連結ピン４３の先端部が連結板３７の挿通孔３９の後
方外部に位置し、この解除状態から作動部４１を進出駆
動してロッド４２を進出限度位置まで駆動した状態（以
下、挿入状態という）で連結ピン４３が挿通孔３９内に
貫通状に挿入可能となっている。ここで、連結ピン４３
の長軸径は挿通孔３９の内径よりも所定量長く形成さ
れ、また短軸径は挿通孔３９の内径よりも所定量短く形
成されていて、挿入時連結ピン４３の長軸側が鉛直方向
向きになる姿勢（以下、解放姿勢という）で挿通孔３９
内に貫通状に挿入可能となっている。The connecting mechanism 21F includes the horizontal frame portion 2 below the fixed frame 2.
An operating portion 41 formed of a double-rod type hydraulic cylinder is horizontally mounted in the front-rear direction at the front end portion of a support arm 40 that is joined to the central portion of a and extends horizontally forward for a predetermined length. Reference numeral 41 denotes a rod 42 that is horizontally driven forward and backward by hydraulic pressure. A connecting pin 43 having a predetermined elliptical shape in a front view is concentrically provided at a front end portion of the rod 42 so as to concentrically operate. The rod 42 is driven in and out to fix the rod 42 at the retreat limit position (hereinafter referred to as the released state)
Then, the tip of the connecting pin 43 is located outside the rear of the insertion hole 39 of the connecting plate 37, and in this released state, the operating portion 41 is driven to advance and the rod 42 is driven to the advanced limit position (hereinafter, referred to as an inserted state. ), The connecting pin 43 can be inserted into the insertion hole 39 in a penetrating manner. Here, the connecting pin 43
Has a major axis diameter which is longer than the inner diameter of the insertion hole 39 by a predetermined amount, and a minor axis diameter which is shorter than the inner diameter of the insertion hole 39 by a predetermined amount. Insertion hole 39
It can be inserted through the inside.
上記連結ピン４３の姿勢制御は上記水平枠部２ａの下部
にブラケット４４を介して左右方向向きに且つ前後方向
の水平な枢支ピンで揺動自在に配設された油圧シリンダ
４５と、油圧シリンダ４５のロッド４５ａの先端部にブ
ラケットを介して装着された前後方向向きの水平な支軸
４６上を前後に移動可能に一端部が回動自在に装着され
た板状のレバー４７とによって行なわれ、レバー４７の
他端部は作動部４１の後部から所定長さで突出したロッ
ド４２の後端部に外嵌状に回動一体に連結されていて、
油圧シリンダ４５を駆動してロッド４５ａが図中実線で
示す進出位置で連結ピン４３が解放姿勢となり、この解
放姿勢から油圧シリンダ４５を駆動してロッド４５ａが
図中仮想線で示す退入位置で連結ピン４３の長軸側が略
水平方向向きとなる姿勢（以下、支持姿勢という）に姿
勢変更されるようになっている。従って、連結部Ｆにお
いて連結ブラケット２０Ｆに連結機構２１Ｆを固定する
場合、先ず連結機構２１Ｆの作動部４１を解除状態にし
てせり上げ装置でクレーンＣＲを上方へせり上げ、次に
連結ピン４３を解放姿勢にした状態で作動部４１を挿入
状態にし、さらに連結ピン４３を支持姿勢にすることに
よって、連結ピン４３の外周面が挿通孔３９内の左右側
面に当接した状態に固定される。The attitude of the connecting pin 43 is controlled by a hydraulic cylinder 45, which is swingably arranged below the horizontal frame 2a by a horizontal pivot pin in the left-right direction and in the front-rear direction via a bracket 44. The rod-shaped lever 47 has a plate-like lever 47, one end of which is rotatably mounted so as to be movable back and forth on a horizontal support shaft 46 oriented in the front-rear direction, which is mounted on a tip end portion of a rod 45a of the shaft 45 through a bracket. The other end of the lever 47 is connected to the rear end of the rod 42 protruding from the rear of the actuating portion 41 by a predetermined length so as to be externally fitted and pivotally integrated.
When the hydraulic cylinder 45 is driven and the rod 45a is in the advanced position shown by the solid line in the figure, the connecting pin 43 is in the releasing position. From this releasing position, the hydraulic cylinder 45 is driven and the rod 45a is in the retracted position shown by the phantom line in the drawing. The major axis side of the connecting pin 43 is changed to a posture in which it is oriented substantially in the horizontal direction (hereinafter referred to as a support posture). Therefore, when fixing the connecting mechanism 21F to the connecting bracket 20F at the connecting portion F, first, the operating portion 41 of the connecting mechanism 21F is released, and the crane CR is lifted upward by the lifting device, and then the connecting pin 43 is released. When the operating portion 41 is inserted in the posture and the connecting pin 43 is placed in the supporting posture, the outer peripheral surface of the connecting pin 43 is fixed in a state of being in contact with the left and right side surfaces in the insertion hole 39.
即ち、連結ブラケット２０Ｆと連結機構２１Ｆによって
水平方向荷重の支持が行なわれる。That is, the horizontal load is supported by the connecting bracket 20F and the connecting mechanism 21F.
次に、以上のように構成された塔架設用クレーン２Ｃの
固定構造の作用について説明する。Next, the operation of the fixing structure of the tower erection crane 2C configured as described above will be described.
クレーンＣＲは、各連結部Ａ〜Ｆの連結機構２１Ａ〜２
１Ｆが夫々解除状態でせり上げ装置により上下へせり上
げられる。上記各連結部Ａ〜Ｆのうち、先ず連結部Ｅに
おいて一担挿入位置Ｙ１までせり上げられ、連結機構２
１Ｅの連結ロッド３６が挿入状態とされるとともに、各
連結部Ａ〜Ｄ及び連結部Ｆにおいて夫々の各連結ピン２
７・４３がその解放姿勢で挿入状態とされ、その後せり
上げ装置により固定位置Ｙ０に下降されて連結ロッド３
６が挿入孔３３の支持部３３ａに嵌合されて連結される
とともに、各連結ピン２７・４３が解放姿勢から支持姿
勢に姿勢変更されて夫々連結される。The crane CR includes the connecting mechanisms 21A-2 of the connecting parts AF.
1F is lifted up and down by the lifting device in the released state. Of the above-mentioned connecting portions A to F, first, the connecting portion E is lifted up to the supporting insertion position Y 1 , and the connecting mechanism 2
The connecting rod 36 of 1E is put in the inserted state, and the connecting pins 2 of the connecting parts A to D and the connecting part F are connected to each other.
7 and 43 are in the inserted state in the released posture, and then lowered to the fixed position Y 0 by the lifting device and the connecting rod 3
6 is fitted and connected to the support portion 33a of the insertion hole 33, and the connection pins 27 and 43 are connected to each other after the attitude is changed from the release attitude to the support attitude.
従って、連結部Ａ〜Ｄにおいて面外方向荷重の支持が、
また連結部Ｅにおいて鉛直方向荷重及び水平方向荷重の
支持が、さらに連結部Ｆにおいて水平方向荷重の支持が
夫々自動的に確実に行なわれる。Therefore, the support of the out-of-plane load at the connecting portions A to D is
Further, the vertical load and the horizontal load are automatically supported by the connecting portion E, and the horizontal load is automatically and reliably supported by the connecting portion F.
そして、鉛直方向荷重の支持が、クレーンＣＲの旋回軸
を支持する固定ポスト３の前方側の略旋回中立線上の位
置に設けられた連結部Ｅによって行なわれるので、クレ
ーンＣＲのブーム５が左右に旋回して生じる面外方向の
軸心回りの回転モーメントは全て水平方向荷重の支持を
行なう連結部Ｅ・Ｆに水平方向荷重として作用する。こ
の各連結部Ｅ・Ｆは塔体Ｔの高さ方向に亙って配設され
る構造上、外側面１の幅方向に配設された連結部Ａ・Ｂ
間及び連結部Ｃ・Ｄ間の間隔よりも十分大きな間隔を保
持して配設出来ているため、上記変動する回転モーメン
トにより発生する水平方向荷重は連結部Ｅ・Ｆ間の大き
なスパンによって小さくなり、各連結部Ｅ・Ｆに作用す
る最大水平荷重は低減されている。従って、上記水平方
向荷重に加えて鉛直方向荷重が作用する連結部Ｅの固定
構造はもとより、面外方向荷重を支持する連結部Ａ〜Ｄ
の固定構造は可及的に小型構造に出来る。Since the vertical load is supported by the connecting portion E provided on the front side of the fixed post 3 that supports the swing shaft of the crane CR on the approximate swing neutral line, the boom 5 of the crane CR is moved to the left and right. All the rotational moments about the axial center in the out-of-plane direction generated by turning act as horizontal loads on the connecting portions E and F that support horizontal loads. Because of the structure in which the connecting portions E and F are arranged in the height direction of the tower body T, the connecting portions A and B are arranged in the width direction of the outer side surface 1.
Since the space between the connecting parts C and D can be arranged with a space sufficiently larger than the space between the connecting parts C and D, the horizontal load generated by the fluctuating rotational moment is reduced by the large span between the connecting parts E and F. The maximum horizontal load acting on each of the connecting portions E and F is reduced. Therefore, not only the fixing structure of the connecting portion E to which the vertical load acts in addition to the horizontal load, but also the connecting portions A to D for supporting the out-of-plane load.
The fixed structure can be made as small as possible.
（第１変形例） 第１変形例は、前記実施例の各連結部Ａ〜Ｄの固定構造
を変更したものであり、連結部Ｅ・Ｆょ構造は前記実施
例と同様である。(First Modification) The first modification is a modification of the fixing structure of the connecting parts A to D of the above-described embodiment, and the connecting parts E and F structures are the same as those of the above-mentioned embodiment.
また、この連結部Ａ〜Ｄの固定構造は同じ構造なので連
結部Ａについてのみ説明する。Since the fixing structures of the connecting portions A to D are the same, only the connecting portion A will be described.
連結部Ａは、第９図〜第１１図に示すように、塔体Ｔの
外側面１上に連結ブラケット５０Ａが、またクレーンＣ
Ｒの固定フレーム２に連結機構５１Ａが夫々設けられて
いる。As shown in FIGS. 9 to 11, the connecting portion A includes a connecting bracket 50A on the outer side surface 1 of the tower body T, and a crane C.
Connecting mechanisms 51A are provided on the R fixed frames 2 respectively.
連結ブラケット５０Ａは、外側面１と平行な連結板５２
を備え、連結板５２の中央部には左右水平方向に所定の
内径を有し且つ鉛直方向に亙って所定の長さを有する長
穴状の挿通孔５３が貫通状に設けられている。The connecting bracket 50A includes a connecting plate 52 parallel to the outer surface 1.
The connecting plate 52 is provided at its center with a through hole 53 having a predetermined inner diameter in the horizontal direction and a predetermined length in the vertical direction.
連結機構５１Ａは、固定フレーム２の支柱部２ｃの外周
面の上端前部から前方に向って水平に延びる支持アーム
５４の前端部にダブルロッドタイプの油圧シリンダから
なる作動部５５を前後方向向きに水平に装着してなり、
作動部５５は油圧で前後方向に進退駆動されるロッド５
６を有し、ロッド５６の前端部には所定の長方形状の板
状の掛止板５６ａが装着され、作動部５５を退入駆動し
てロッド５６を退入限度位置に固定した状態（以下、解
除状態という）で掛止板５６ａが連結ブラケット５０Ａ
の挿通穴５３の後方外部に位置し、この解除状態から作
動部５５を進出駆動してロッド５６ａを進出限度位置ま
で駆動した状態（以下、挿入状態という）で掛止板５６
ａが挿通孔５３内に貫通状に挿入可能となっている。支
持アーム５４の下面にはブラケットを介して前後方向の
水平な枢支ピンで揺動自在に枢着された左右方向向きの
油圧シリンダ５７が設けられ、油圧シリンダ５７のロッ
ドの先端部にはブラケット５７ａが装着され、ブラケッ
ト５７ａには前後方向の水平な支軸を介してレバー５８
の一端部が回動自在に連結され、レバー５８の他端部
は、作動部５５のロッド５６の後部外周に長さ方向に亙
って凹設された嵌合溝５９を介してロッド５６の後部に
回動一体に連結され、ロッド５６はレバー５８内を前後
に移動自在となっている。油圧シリンダ５７を退入駆動
して図中実線で示す退入位置において掛止板５６ａの長
辺方向が鉛直方向向きの姿勢（以下、解除姿勢という）
をとり、この解除姿勢において掛止板５６ａの短辺の長
さが挿通孔５３の内径よりも短く形勢されていて、挿通
状態において挿通孔５３内に挿入可能となっている。The connecting mechanism 51A has an operating portion 55 formed of a double-rod type hydraulic cylinder at the front end portion of a support arm 54 extending horizontally forward from the upper end front portion of the outer peripheral surface of the column 2c of the fixed frame 2 in the front-rear direction. Be mounted horizontally,
The operating portion 55 is a rod 5 which is hydraulically driven to move forward and backward.
6, a predetermined rectangular plate-like latching plate 56a is attached to the front end portion of the rod 56, and the operating portion 55 is driven to move in and out to fix the rod 56 to the retracted limit position (hereinafter , The released state), the latch plate 56a is the connecting bracket 50A.
Is located outside the rear of the insertion hole 53, and in this released state, the operating portion 55 is driven to advance and the rod 56a is driven to the advance limit position (hereinafter, referred to as an inserted state).
The a can be inserted into the insertion hole 53 in a penetrating manner. On the lower surface of the support arm 54, a horizontal hydraulic cylinder 57 pivotally mounted by a horizontal pivot pin in the front-rear direction via a bracket is provided. The hydraulic cylinder 57 has a bracket at the tip of the rod. 57a is mounted, and a lever 58 is attached to the bracket 57a via a horizontal support shaft in the front-rear direction.
One end of the rod 56 is rotatably connected, and the other end of the lever 58 is connected to the outer periphery of the rear portion of the rod 56 of the operating portion 55 through a fitting groove 59 that is recessed in the longitudinal direction. The rod 56 is connected to the rear part so as to rotate integrally, and the rod 56 is movable back and forth in the lever 58. A posture in which the hydraulic cylinder 57 is driven to retract and the long side direction of the latch plate 56a is in the vertical direction at the retracted position shown by the solid line in the figure (hereinafter referred to as the release posture).
In this releasing posture, the length of the short side of the latch plate 56a is set to be shorter than the inner diameter of the insertion hole 53, and it can be inserted into the insertion hole 53 in the inserted state.
さらに、この状態から油圧シリンダ５７を進出駆動して
図中仮想線で示す進出限度位置まで進出させると、掛止
板５６ａの長辺方向が水平方向向きの姿勢（以下、支持
姿勢という）となり、この支持姿勢において掛止板５６
ａの長辺の長さが挿通孔５３の内径よりも長く形成され
ていて挿通状態にあるとき掛止板５６ａの後面が連結板
５２に当接可能となる。更に、この状態から作動部５５
を退入駆動して解除状態側へ駆動すると、ロッド５６の
退入に伴って掛止板５６ａの後面が連結板部５２に当接
するとともに、支持アーム５４の前端部から前方に向っ
てロッド５６の左右両側部に突設された一対の当接板５
４ａの前端面が連結板５２に当接して連結ブラケット５
０Ａに連結機構５１Ａが連結され、これにより面外方向
荷重の支持が行なわれる。Further, when the hydraulic cylinder 57 is driven to advance from this state to the advance limit position shown by the imaginary line in the figure, the long side direction of the latch plate 56a becomes a horizontal orientation (hereinafter referred to as a support orientation), In this supporting posture, the latch plate 56
When the length of the long side of a is longer than the inner diameter of the insertion hole 53 and is in the inserted state, the rear surface of the latch plate 56a can come into contact with the connecting plate 52. Further, from this state, the operating portion 55
When the rod 56 is retracted and driven to the release state side, the rear surface of the latch plate 56a contacts the connecting plate portion 52 as the rod 56 retracts, and the rod 56 moves forward from the front end portion of the support arm 54. A pair of abutting plates 5 projecting from both left and right sides of the
The front end surface of 4a abuts on the connecting plate 52 so that the connecting bracket 5
The connecting mechanism 51A is connected to 0A, and thereby supports the out-of-plane load.
（第２変形例） この第２変形例は、上記第１変形例の連結部Ｃ・Ｄを省
略して、連結部Ａ・Ｂ・Ｅ・Ｆの４箇所でクレーンＣＲ
を固定支持する構造のものであり、連結部Ａ・Ｂは第１
変形例の連結部Ａ・Ｂと同様の構造で、連結部Ｅは前記
実施例の連結部Ｅと同様の構造なので、連結部Ｆの構造
について説明する。(Second Modified Example) In the second modified example, the connecting portions C and D of the first modified example are omitted, and the crane CR is provided at four connecting portions A, B, E, and F.
Is a structure for fixing and supporting the first and second connecting portions A and B.
Since the connecting portion E has the same structure as the connecting portions A and B and the connecting portion E has the same structure as the connecting portion E of the above-described embodiment, the structure of the connecting portion F will be described.
連結部Ｆは、前記実施例の連結部Ｆと同じ位置に配設さ
れ、水平方向荷重と面外方向荷重を支持する構造となっ
ている。The connecting portion F is arranged at the same position as the connecting portion F of the above-mentioned embodiment, and has a structure for supporting a horizontal load and an out-of-plane load.
連結部Ｆには、第１２図〜第１５図に示すように、塔体
Ｔの外側面１上に連結ブラケット６０Ｆが、またクレー
ンＣＲの固定フレーム２に連結機構６１Ｆが夫々設けら
れている。As shown in FIGS. 12 to 15, the connecting portion F is provided with a connecting bracket 60F on the outer surface 1 of the tower T and a connecting mechanism 61F on the fixed frame 2 of the crane CR.
連結ブラケット６０Ｆは、外側面１と平行な連結板６２
を備え、連結板６２の中央部には左右水平方向に所定の
内径を有し且つ鉛直方向に亙って所定の長さを有する長
穴状の挿通功６３が貫通状に設けられている。The connecting bracket 60F includes a connecting plate 62 parallel to the outer surface 1.
The connecting plate 62 is provided with a long hole-shaped insertion pin 63 having a predetermined inner diameter in the horizontal direction and a predetermined length in the vertical direction in a penetrating manner.
連結機構６１Ｆは、固定フレーム２の下部の水平枠部２
ａの中央部に接合され前方に向って水平に延びる支持ア
ーム６４の前端部に装着されたダブルロッドタイプの油
圧シリンダからなる作動部６５を前後方向向きに水平に
備えている。The connecting mechanism 61F includes the horizontal frame portion 2 below the fixed frame 2.
An operating portion 65, which is a double rod type hydraulic cylinder attached to the front end of a support arm 64 that is joined to the central portion of a and extends horizontally toward the front, is provided horizontally in the front-rear direction.
作動部６５は、油圧で前後方向に進退駆動されるスリー
ブ状ロッド６６の前端部に正面視所定の楕円形状の外周
面を有するスリーブ状の連結ピン６７が同心状に一体的
に設けられ、ロッド６６と連結ピン６７の内部にはツイ
ストロックピン６８が揺動自在に装着され、ツイストロ
ックピン６８の前端部には所定の長方形状の掛止板６８
ａが、またツイストロックピン６８の後端部はロッド６
６の後端面より所定の長さ突出し、ロッド６６の後端面
と当接する掛止板６８ｄを有し、ツイストロックピン６
８は作動部６５によってロッド６６に連動して進退駆動
されるようになっている。そして、作動部６５を退入駆
動してロッド６６を退入限度位置に固定した状態（以
下、解除状態という）でツイストロックピン６８の掛止
板６８ａが連結ブラケット６０Ｆの挿通孔６３の後方外
部に位置し、この解除状態から作動部６５を進出駆動し
てロッド６６を進出限度位置まで駆動した状態（以下、
挿通状態という）で掛止板６８ａと連結ピン６７が挿通
孔６３内に貫通状に挿入可能になっている。In the operating portion 65, a sleeve-shaped connecting pin 67 having an outer peripheral surface of a predetermined elliptical shape in front view is concentrically provided integrally with the front end portion of a sleeve-shaped rod 66 that is driven forward and backward by hydraulic pressure. A twist lock pin 68 is swingably mounted inside the 66 and the connecting pin 67, and a predetermined rectangular locking plate 68 is attached to the front end portion of the twist lock pin 68.
a is the rod end of the twist lock pin 68.
6 has a hook plate 68d that projects a predetermined length from the rear end surface and abuts on the rear end surface of the rod 66.
The actuator 8 is driven forward and backward by an operating portion 65 in conjunction with a rod 66. Then, in a state in which the operating portion 65 is driven to retract and the rod 66 is fixed to the retract limit position (hereinafter, referred to as a release state), the latch plate 68a of the twist lock pin 68 is located outside the insertion hole 63 of the coupling bracket 60F at the rear outside. And the rod 66 is driven to the advance limit position by driving the operating portion 65 from this released state (hereinafter,
In the inserted state), the latch plate 68a and the connecting pin 67 can be inserted into the insertion hole 63 in a penetrating manner.
そして、支持アーム６４の下面にはブラケットを介して
前後方向の水平な枢支ピンで揺動自在に装着された左右
方向向きの油圧シリンダ６９・７０が夫々前後に並設さ
れ、各油圧シリンダ６９・７０のロッドの先端部にはブ
ラケット６９ａ・７０ａが夫々装着され、各ブラケット
６９ａ・７０ａには夫々前後方向に水平な支軸を介して
各レバー７１・７２の一端が回動自在に連結され、レバ
ー７１の他端部はロッド６６の後部にその長さ方向に凹
設された嵌合溝６６ａを介して回動一体に外嵌され、ロ
ッド６６の後端部はレバー７１内を前後に移動自在にな
っている。レバー７２の他端部はロッド６６と同様にツ
イストロックピン６８の後端部にその長さ方向に凹設さ
れた嵌合溝６８ｃを介して回動一体に外嵌され、ツイス
トロックピン６８の後端部はレバー７２内に前後に移動
自在でツイストロックピン６８の後端面に設けられた抜
止板６８ｄで係止されている。また、ツイストロックピ
ン６８の後方の固定フレームの水平枠部２ａには、作動
部６５が退入駆動されたときに、ツイストロックピン６
８の後部の侵入を許容する凹部が形成されている。従っ
て、各油圧シリンダ６９・７０を夫々退入駆動して図中
実線で示す退入位置において連結ピン６７の長軸方向及
びツイストロックピン６８の掛止板６８ａの長辺方向が
夫々鉛直方向向きとなる姿勢（以下、解除姿勢という）
をとり、この解除姿勢において連結ピン６７の短軸径及
びツイストロックピン６８の掛止板６８ａの短辺の長さ
が夫々挿通孔６３の内径よりも短く形成されていて挿通
孔６３内に貫通状に挿通可能となっている。さらに、こ
の状態から各油圧シリンダ６９・７０を夫々進出駆動し
て図中仮想線で示す進出位置において連結ピン６７の長
軸方向及びツイストロックピン６８の掛止板６８ａの長
辺方向が夫々水平方向向きとなる姿勢（以下、支持姿勢
という）をとり、この支持姿勢において連結ピン６７の
長軸径及びツイストロックピン６８の掛止板６８ａの長
辺の長さが夫々挿通孔６３の内径よりも長く形成されて
いる。On the lower surface of the support arm 64, hydraulic cylinders 69, 70 oriented in the left-right direction, which are swingably mounted via horizontal brackets in the front-rear direction via brackets, are arranged side by side in the front-rear direction, respectively. Brackets 69a, 70a are attached to the tip of the rod of 70, and one end of each lever 71, 72 is rotatably connected to each bracket 69a, 70a via a horizontal shaft in the front-rear direction. The other end of the lever 71 is pivotally integrated with the rear portion of the rod 66 through a fitting groove 66a recessed in the longitudinal direction of the lever 66, and the rear end portion of the rod 66 moves back and forth in the lever 71. It is movable. Similarly to the rod 66, the other end of the lever 72 is externally and rotationally fitted onto the rear end of the twist lock pin 68 via a fitting groove 68c recessed in the longitudinal direction of the twist lock pin 68. The rear end portion is movable back and forth in the lever 72, and is locked by a retaining plate 68d provided on the rear end surface of the twist lock pin 68. Further, the twist lock pin 6 is provided in the horizontal frame portion 2a of the fixed frame behind the twist lock pin 68 when the operating portion 65 is driven to move in and out.
8 is formed with a recess that allows the rear part to enter. Therefore, when the hydraulic cylinders 69 and 70 are driven to retract, the longitudinal direction of the connecting pin 67 and the long side direction of the latch plate 68a of the twist lock pin 68 are oriented in the vertical direction at the retracted position shown by the solid line in the figure. Posture (hereinafter referred to as release posture)
In this releasing posture, the short axis diameter of the connecting pin 67 and the length of the short side of the latch plate 68a of the twist lock pin 68 are formed shorter than the inner diameter of the insertion hole 63, respectively, and penetrate into the insertion hole 63. It can be inserted in a shape. Further, from this state, the hydraulic cylinders 69 and 70 are respectively driven to advance, and at the advanced position shown by the phantom line in the figure, the long axis direction of the connecting pin 67 and the long side direction of the latch plate 68a of the twist lock pin 68 are horizontal. In this supporting attitude, the major axis diameter of the connecting pin 67 and the length of the long side of the latch plate 68a of the twist lock pin 68 are respectively greater than the inner diameter of the insertion hole 63. Is also formed long.
つまり、連結部Ｆにおいては、連結ピン６７とツイスト
ロックピン６８を夫々解除姿勢にし、且つ作動部６５を
解除状態にしてせり上げ装置により上方へせり上げた
後、先ず作動部６５を挿入状態まで駆動し、次に油圧シ
リンダ７０を駆動してツイストロックピン６８を支持姿
勢まで駆動する。この状態から作動部６５を退入駆動し
て解除状態側へ駆動すると、ロッド６６の退入に伴って
連結ピン６７とツイストロックピン６８が退入駆動さ
れ、掛止板６８ａの後面が連結板６２に当接するととも
に、支持アーム６４の前端部から前方に向ってロッド６
６の左右両側部に突設された１対の当接板６４ａの先端
面が連結板６２に当接して面外方向荷重の支持が行なわ
れ、この状態から油圧シリンダ６９を駆動して連結ピン
６７を支持姿勢まで駆動すると、連結ピン６７の外周面
が挿通孔６３内の左右側面に当接して水平方向荷重の支
持が行われる。In other words, in the connecting portion F, the connecting pin 67 and the twist lock pin 68 are respectively in the releasing posture, and the operating portion 65 is in the released state, and then the operating portion 65 is raised to the insertion state after being raised upward by the raising device. Then, the hydraulic cylinder 70 is driven to drive the twist lock pin 68 to the supporting posture. When the actuating portion 65 is driven to retreat from this state and driven to the release state side, the connecting pin 67 and the twist lock pin 68 are driven to retreat as the rod 66 retracts, and the rear surface of the latch plate 68a is connected to the connecting plate. 62 while abutting on the rod 62 and moving forward from the front end of the support arm 64.
The front end surfaces of a pair of contact plates 64a projecting from the left and right sides of 6 contact the connecting plate 62 to support the out-of-plane load, and the hydraulic cylinder 69 is driven from this state to connect the connecting pin. When 67 is driven to the supporting posture, the outer peripheral surface of the connecting pin 67 comes into contact with the left and right side surfaces in the insertion hole 63 to support the horizontal load.
従って、連結部Ｆにおいては水平方向荷重と下部側の面
外方向荷重が支持され、連結部Ａ・Ｂにおいて上部側の
面外方向荷重が支持され、連結部Ｅにおいて鉛直方向荷
重と水平方向荷重が支持されるが、前記実施例と同様に
鉛直方向荷重がブーム５の旋回中心上の連結部Ｅで支持
されるため下部側の面外方向の荷重と水平方向荷重を支
持する連結部Ｆの固定構造は比較的小型の構造に出来る
ため、クレーンＣＲを各連結部Ａ・Ｂ・Ｅ・Ｆの４箇所
で支持する固定構造であっても夫々の支持構造は小型の
構造にすることが出来る上、連結部を減らし各連結部の
Ａ・Ｂ・Ｅ・Ｆの連結を確実にしかも自動化して行なう
ことが出来る。Therefore, the connecting portion F supports the horizontal load and the lower-side out-of-plane load, the connecting portions A and B support the upper-side out-of-plane load, and the connecting portion E supports the vertical load and the horizontal load. However, since the vertical load is supported by the connecting portion E on the turning center of the boom 5 as in the above-described embodiment, the connecting portion F supporting the lower lateral load and the horizontal load is supported. Since the fixing structure can be a relatively small structure, each supporting structure can be a small structure even if it is a fixing structure that supports the crane CR at each of four connecting portions A, B, E, and F. In addition, the number of connecting parts can be reduced, and the connecting of A, B, E, and F of each connecting part can be performed reliably and automatically.
図面は、本考案の実施例を示すもので、第１図はクレー
ンとクレーンを固定する塔体の上部の斜視図、第２図は
連結部の配設位置を示す塔体の上部斜視図、第３図は第
２図III−II線平面図、第４図は第２図IV−IV線断面
図、第５図は第３図Ｖ−Ｖ線縦断面図、第６図は第４図
VI−VI線断面図、第７図は第３図VII−VII線縦断側面
図、第８図は第４図VIII−VIII線縦断側面図、第９図は
第１変形例に係る第２図相当図、第１０図は第９図Ｘ矢
視平面図、第１１図は第１０図ＸＩ−ＸＩ線縦断側面
図、第１２図は第２変形例に係る第２図相当図、第１３
図は第１２図ＸIII−ＸIII線断平面図、第１４図は第１
３図ＸIV−ＸIV線縦断面図、第１５図は第１３図ＸＶ−
ＸＶ線縦断面図である。 Ｔ……塔体、ＣＲ……塔架設用クレーン、１……外側
面、２……固定フレーム、Ａ・Ｂ・Ｅ・Ｆ……連結部、
２０Ａ・２０Ｂ・２０Ｅ・２０Ｆ……連結ブラケット、
２１Ａ・２１Ｂ・２１Ｅ・２１Ｆ……連結機構、５０Ａ
・６０Ａ・６０Ｆ……連結ブラケット、５１Ａ・６１Ａ
・６１Ｆ……連結機構。The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of a crane and an upper part of a tower for fixing the crane, and FIG. 2 is a perspective view of an upper part of the tower for showing a mounting position of a connecting portion. 3 is a plan view taken along the line III-II in FIG. 2, FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, FIG. 5 is a vertical cross-sectional view taken along the line VV in FIG. 3, and FIG. 6 is FIG.
VI-VI sectional view, FIG. 7 is a longitudinal side view of FIG. 3 taken along the line VII-VII, FIG. 8 is a lateral side view of taken along the line VIII-VIII of FIG. 4, and FIG. Corresponding view, FIG. 10 is a plan view taken in the direction of arrow X in FIG. 9, FIG. 11 is a vertical sectional side view of FIG. 10 taken along the line XI-XI, and FIG. 12 is a corresponding view of FIG.
Fig. 12 is a plan view taken along the line XIII-XIII in Fig. 12, and Fig. 14 is the first view.
Fig. 3 XIV-XIV vertical sectional view, Fig. 15 is Fig. 13 XV-
It is an XV line vertical cross-sectional view. T ... Tower, CR ... Crane for tower erection, 1 ... Outer surface, 2 ... Fixed frame, A / B / E / F ... Connection part,
20A, 20B, 20E, 20F ... Connection bracket,
21A, 21B, 21E, 21F ...... Coupling mechanism, 50A
・ 60A ・ 60F …… Connecting bracket, 51A ・ 61A
・ 61F …… Coupling mechanism.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 松本 国明 兵庫県加古郡播磨町新島８ 川重工事株式 会社西部支社内 (72)考案者 多久田 好広 兵庫県加古郡播磨町新島８ 川重工事株式 会社西部支社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kuniaki Matsumoto 8 Kawajyu Construction Co., Ltd., Niijima, Harima-cho, Kako-gun, Hyogo Prefecture West Branch Office (72) Inventor Yoshihiro Takuda 8 Kawaju-ku, Harima-cho, Kako-gun, Hyogo Pref. Western branch office
Claims (1)
ブーム旋回式塔架設用クレーンを固定支持する構造にお
いて、 塔架設用クレーンの固定フレームの上部及びこれに対応
する上記側壁部の部分に３箇所の連結部を設け、 上記固定フレームの下部及びこれに対応する上記側壁部
の部分に少なくとも１箇所の連結部を設け、 上記上部の３箇所の連結部のうちの中央の連結部は、鉛
直方向荷重と上記側壁部と平行な水平方向荷重を分担す
るように構成されるとともに、残りの２箇所の連結部
は、上記側壁部に略垂直な方向の荷重のみを分担するよ
うに構成され、 上記下部の少なくとも１箇所の連結部は少なくとも上記
側壁部と平行な水平方向荷重を分担するように構成され
ていることを特徴とする塔架設用クレーンの固定構造。1. A structure in which a boom swing type tower erection crane is fixedly supported by a plurality of connecting portions on a side wall portion of a tower structure, wherein an upper portion of a fixed frame of the tower erection crane and the side wall portion corresponding thereto. The connecting portion is provided at three portions, the connecting portion is provided at least at one portion on the lower portion of the fixed frame and the side wall portion corresponding thereto, and the central connecting portion among the above three connecting portions is provided. Is configured to share the vertical load and the horizontal load parallel to the side wall portion, and the remaining two connecting portions share only the load in the direction substantially perpendicular to the side wall portion. A fixing structure for a tower erection crane, wherein at least one connecting portion of the lower portion is configured to share at least a horizontal load parallel to the side wall portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3286688U JPH0630886Y2 (en) | 1988-03-11 | 1988-03-11 | Fixed structure of tower erection crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3286688U JPH0630886Y2 (en) | 1988-03-11 | 1988-03-11 | Fixed structure of tower erection crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01137312U JPH01137312U (en) | 1989-09-20 |
| JPH0630886Y2 true JPH0630886Y2 (en) | 1994-08-22 |
Family
ID=31259465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3286688U Expired - Lifetime JPH0630886Y2 (en) | 1988-03-11 | 1988-03-11 | Fixed structure of tower erection crane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630886Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4751478B1 (en) * | 2010-10-26 | 2011-08-17 | 三井造船株式会社 | Telescopic boom support device for tower crane |
-
1988
- 1988-03-11 JP JP3286688U patent/JPH0630886Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4751478B1 (en) * | 2010-10-26 | 2011-08-17 | 三井造船株式会社 | Telescopic boom support device for tower crane |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01137312U (en) | 1989-09-20 |
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