JP2010254398A - Lattice boom of crane - Google Patents

Lattice boom of crane Download PDF

Info

Publication number
JP2010254398A
JP2010254398A JP2009104212A JP2009104212A JP2010254398A JP 2010254398 A JP2010254398 A JP 2010254398A JP 2009104212 A JP2009104212 A JP 2009104212A JP 2009104212 A JP2009104212 A JP 2009104212A JP 2010254398 A JP2010254398 A JP 2010254398A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
boom
main pillar
lattice
constituting
lattice boom
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.)
Pending
Application number
JP2009104212A
Other languages
Japanese (ja)
Inventor
猛 ▲濱▼田
Takeshi Hamada
Hiromitsu Hamaguchi
Yutaka Kobayashi
Eiji Miya
Hironori Yamaguchi
英司 宮
豊 小林
拓則 山口
裕充 濱口
Original Assignee
Kobe Steel Ltd
Kobelco Cranes Co Ltd
コベルコクレーン株式会社
株式会社神戸製鋼所
Priority date (The priority date 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 date listed.)
Filing date
Publication date

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lattice boom of a crane increasing a bending rigidity without excessively increasing the weight and excessively deteriorating suspending performance. <P>SOLUTION: In the lattice boom including four main pillar materials 5 and a plurality of auxiliary diagonal materials 6 connected between the adjacent main pillar materials 5 of the four main pillar materials 5 in a tilt state, an outer dimension D1 of a cross section of the main pillar material of a lower boom 2 constituting the lattice boom is larger than the outer dimensions D2 and D3 of the cross section of the main pillar material 5 of an intermediate boom 3 and an upper boom 4 constituting the lattice boom. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、移動式クレーンのラチスブームに関し、更に詳しくは、ブームの大きな重量増加を伴うことなく曲げ剛性を向上可能なラチスブームに関するものである。 The present invention relates to a lattice boom of a mobile crane, and more particularly to a lattice boom can be improved flexural rigidity without a large increase in the weight of the boom.

先ず、本発明に係る移動式クレーンの例を、添付図7を参照しながら説明する。 First, an example of a mobile crane according to the present invention will be described with reference to the accompanying drawings 7. 図7は従来例に係るラチスブームを有する一般的な移動式クレーンを示す側面図である。 Figure 7 is a side view showing a general mobile crane having a lattice boom according to a conventional example.

この移動式クレーンは、図7に示す様にラチス構造を有するラチスブーム11を備えた、無限軌道(クローラ)で自走可能なクレーンである。 The mobile crane, comprising a lattice boom 11 having a lattice structure as shown in FIG. 7, a self-propelled crane with caterpillar (crawler). このラチスブーム11は、下から下部ブーム12、中間ブーム13及び上部ブーム14と呼ばれる3種の構造部材から構成される。 The lattice boom 11 is composed of three structural member called a lower boom 12, the intermediate boom 13 and upper boom 14 from below. そして、その横断面の外形は矩形状をなし、この矩形状断面の4隅にパイプ部材からなる主柱材15が配設されると共に、相隣り合う前記主柱材15同士の間に複数本の補助斜材16が傾斜状態に連結されて、軽量で圧縮強度の高いブーム11が構成される。 Then, the external shape of the cross-section a rectangular shape, a plurality with, between each other the main pillar 15 adjacent phase main pillar 15 made of a pipe member to the four corners of the rectangular cross section is disposed auxiliary diagonal members 16 is connected to the inclined state, high boom 11 with compression strength is composed of lightweight.

そして、前記下部ブーム12は、図示しないブーム基端部をクレーン本体19に回動可能に取り付けられるため、下方に行くに従って側面から見たブーム幅が狭くなる様に形成され、前記ブーム基端部は、左右のボスに回動自在に支承されている。 Then, the lower boom 12, since the rotatably mounted boom base end portion (not shown) to the crane body 19, a boom width as viewed from the side is formed so as narrows toward the downward, the boom base end portion It is rotatably supported on the left and right bosses. 前記中間ブーム13は複数分割、即ち本例では3分割され、分割された各単位ブーム13a,13b,13cは長さが異なるものもあるが、長さ以外は基本的に同一構造を有し、これら単位ブーム13a,13b,13cを必要な長さまで継ぎ足して必要とするブーム長が得られる様に構成されている。 The intermediate boom 13 more split, i.e. in this example is divided into three parts, each unit booms 13a divided, 13b, although 13c is also what different lengths, except lengths have basically the same structure, these unit booms 13a, 13b, the boom length to be required in replenishing to the length required to 13c are configured so as to be obtained. また、上部ブーム14には、フック17を吊下げる滑車が取り付けられる様になっている。 In addition, the upper boom 14, has become like pulley hanging the hook 17 is attached.

この様に、下部ブーム12、中間ブーム13及び上部ブーム14と呼ばれる3種類の構造部材を継ぎ足してラチスブーム11の1式が構成される。 Thus, the lower boom 12, one set of the intermediate boom 13 and a lattice boom 11 shirttail three structural members called upper boom 14 is constructed. 即ち、前記各構造部材は、主柱材15の端部が後述する様にピン結合して接合される。 In other words, each structural member, an end portion of the main column member 15 are joined by pin-connected as described below. そして、クレーン作業(荷物を吊下げる作業)時のブーム11には主として圧縮力が生じ、それは主柱材15にかかる軸力(圧縮力)となる。 The compressive force is generated primarily in the boom 11 when crane work (work hanging luggage), made it the axial force applied to the primary post member 15 (the compressive force). また、前記ブーム11には、自重等の影響により前後方向の曲げ荷重が生じる。 Further, the boom 11, the longitudinal direction of the bending load due to the influence of its own weight occurs. 更に、ブーム11の旋回加速、停止時には、図7の紙面に直行する横方向にも曲げ荷重が生じる。 Furthermore, the turning acceleration of the boom 11, when stopping, the load is also bent in the lateral direction perpendicular to the sheet of FIG. 7 occurs.

従って、ブームの各構造部材には、圧縮荷重に耐え得る座屈強度が求められる。 Thus, each structural member of the boom, buckling strength that can withstand the compressive load is determined. また、図7のブーム11が起伏する方向となる前後方向、更には前記横方向の曲げ荷重に対して撓みが大きくならない様に、前後・横両方向の曲げ剛性も必要となる。 Further, the longitudinal direction the boom 11 of FIG. 7 is a direction in which the undulations, even As not greatly deflect from the lateral bending load is also required flexural rigidity of the front and rear and lateral directions. 特に、横方向の曲げ変形に対しては、これが大きくなるとクレーン自体が転倒する危険性があるため、横方向の撓みについては定められた規格がある。 In particular, for the lateral bending deformation, which because there is a risk of tipping it becomes large when the crane itself, there is a lateral standards established for the deflection of. そのため、例えば北米であれば、吊荷重の2%の荷重をブームの水平横方向に与えて、ブーム横方向の撓み量をブーム長の2%未満とすべきことが規格SAE J978 REV.JUN2003で定められている。 Therefore, for example, if in North America, suspended with 2% of the load of the load applied to the horizontal transverse direction of the boom, the amount of deflection of the boom laterally should be less than 2% of the boom length in the standard SAE J978 REV.JUN2003 It is defined.

一方、重心位置が本体から高い(遠い)位置にあるブームは、その自重が大きくなると転倒し易くなるため、荷物を吊る能力の低下を招く。 Meanwhile, the boom center of gravity position is higher from the body (distant) position, it becomes easy to fall with its own weight is increased, leading to reduced ability to suspend a load. そのためブームの荷重はできるだけ軽くする必要がある。 Therefore, the load of the boom needs to be as light as possible. この様に、ラチスブームは強度及び曲げ剛性を保持しながら、できるだけ軽量にすることが望まれる。 Thus, a lattice boom while retaining the strength and flexural rigidity, it is desirable to as light as possible.

そこで次に、この様な課題に対して提案されている従来技術に関し、以下添付図8〜10を参照しながら説明する。 Therefore, next, it relates the prior art that have been proposed for such problems will be described with reference to the accompanying drawings 8-10 below. 図8は従来技術1に係るラチス型ブームの一部分解斜視図、図9(a)は図8の補助斜材にかかる軸力の分布グラフ、同図(b)は図(a)の軸力分布グラフに対応して補助斜材に番号を付した説明図、図10は従来技術2の実施の形態に係り、図(a)は四角鋼管の横断面図、図(b)はラチスブームの主柱材と補助斜材との溶接部説明斜視図である。 Figure 8 is a partially exploded perspective view of a lattice boom according to the prior art 1, the axial force of the FIG. 9 (a) axial force distribution graph according to the auxiliary diagonal members 8, FIG. (B) FIG. (A) in response to distribution graph are numbered in the auxiliary diagonal members illustration, FIG. 10 relates to the embodiment of the prior art 2, Fig. (a) is a cross-sectional view of a square steel tube, (b) shows a main of the lattice boom a weld explanatory perspective view of the pillar and the auxiliary diagonal member.

従来技術1に係るラチス型ブームはジブを有するクレーンに関するものであって、図8に示す如く、4本の主柱材201と、その主柱材201の隣り合う2本の主柱材201の間にジグザグ状に配設した補助斜材202と、前記4本の主柱材201の両端に設けたジョイントピース206,207とを備えた一単位ブーム200を構成している。 The lattice boom according to the prior art 1 be one for Crane having a jib, as shown in FIG. 8, the four main pillar 201, the adjacent two main pillar 201 of the main pillar 201 an auxiliary diagonal members 202 is disposed in a zigzag manner between, constitute one unit booms 200 that includes a joint piece 206 and 207 provided at both ends of the four main pillar 201.

そして、この一単位ブーム200を適宜所要数連結してなるラチス型ブームにおいて、前記一単位ブーム200の補助斜材202中、主柱材201の両端部側に配設した補助斜材202(図9(b)中番号h−1,h,h+1,h+6,h+7,h+8,h+9,…)を、中間部側に配設した補助斜材202(図9(b)中番号h+2,h+3,h+4,h+5,h+10,h+11,…)より断面積を増加し、あるいは材質的に強度を大きくしたものである。 Then, the lattice type boom this one unit booms 200 formed by connecting suitably desired number, auxiliary in diagonal members 202, the auxiliary diagonal members 202 (FIG. Which is arranged on both end sides of the main pillar 201 of the one unit boom 200 9 (b) medium No. h-1, h, h + 1, h + 6, h + 7, h + 8, h + 9, ...) and the middle auxiliary diagonal members 202 is disposed at an intermediate portion side (Fig. 9 (b) number h + 2, h + 3, h + 4 , h + 5, h + 10, h + 11, ...) from increasing the cross-sectional area, or is obtained by increasing the material to strength. その結果、ジブを介して発生する捩りモーメントに十分耐えられ得ると共に、できる限り軽量化することが可能となるものである(特許文献1参照)。 As a result, it may well withstand the torsional moment generated through the jib, in which it becomes possible to reduce the weight as much as possible (see Patent Document 1).

また、従来技術2に係るラチスブームの主柱材は、四角鋼管21で形成されており、この四角鋼管21の4辺22の外表面は平坦に形成されているが、その横断断面は、図10(b)に示す如く、前記辺22の夫々が、辺端から辺中心側になるほど次第に厚くなる様に、辺22の内面22aがこの四角鋼管21の断面中心Q方向に膨出している。 Further, the main column member of a lattice boom according to the prior art 2 is formed by a square steel tube 21, the outer surface of the four sides 22 of the square steel pipe 21 is formed to be flat, the transverse cross-section, FIG. 10 as (b), the each of the sides 22, the more so as gradually thickened from the side end to the side center side, the inner surface 22a of the side 22 is bulged section center direction Q of the square steel pipe 21. また、この四角鋼管21の相隣り合う内面22aと内面22aとなす内側コーナー部には、所定のR23が形成されている。 Further, the inner corner portion formed by the phase adjacent the inner surface 22a and the inner surface 22a of this square steel tube 21, a predetermined R23 is formed. この様に形成された四角鋼管21を、ラチスブームの主柱材に用いることによって、補助斜材25との接合部における主柱材の辺22の中心部に発生する応力レベルが下がると共に応力レベルが均等化されるものである(特許文献2参照)。 Square steel pipe 21 formed in this manner, by using the main pillar of the lattice boom, the stress level with the stress levels generated in the center portion of the side 22 of the main pillar is lowered at the junction between the auxiliary diagonal member 25 it is intended to be equalized (see Patent Document 2).

しかしながら、上記従来技術1に係るラチス型ブームは、捩りモーメントに十分耐えられ得る構造を有するものの、曲げ剛性に対しては特に配慮されてはいない。 However, lattice boom according to the prior art 1, although having a structure capable of sufficiently withstand the torsional moment, is not particularly care for flexural rigidity. また、上記従来技術2に係るラチスブームは、主柱材として特殊な断面形状を有する四角鋼管を用いる必要性があるため、ブームの製作上コスト高を招くことになる。 Moreover, a lattice boom according to the prior art 2, since there is a need to use a square steel pipe having a special cross-sectional shape as the main pillar, which leads to production on costly boom.

一方、移動式クレーンのブームは、輸送性を考慮して上記の如く幾つかの構造部材に分割する様になっているが、各構造部材に用いられる主柱部材及び補助斜材は、下部ブームでは最も肉厚を厚く、次いで下側に位置する中間ブームの肉厚を厚く形成する場合がある。 On the other hand, the boom of the mobile crane is taking into account the transport properties have become as divided into several structural members as described above, the primary posts member and the auxiliary diagonal members used for each structural member, the lower boom in thickest of thick, then it may form a thick wall thickness of the intermediate boom is positioned on the lower side. しかしながら、前記中間ブームは、下記に述べる理由から横断面の外形寸法が同一であって、かつこれを構成する構造部材の肉厚も同一であるのが望まれる。 However, the intermediate boom is the same external dimensions of the cross section for reasons described below, and the thickness of the structural members constituting also the same is desired it.

(1)中間ブーム横断面の外形寸法を変えた場合、断面変化の生じる箇所で面外方向の荷重が生じる。 (1) When changing the outer dimensions of the intermediate boom cross section, the load of the plane direction at the point of occurrence of cross-sectional changes occur. また、応力集中の原因にもなるため、強度設計が非常に難しくなる。 In addition, since the cause of the stress concentration, strength design is very difficult. 敢えて採用した場合も、ブーム中間部に支持ケーブルを追加する等構造が複雑になるため、特別に長尺なブームでない限りメリットはない。 May dared adopted, because the isostructural to add support cable to the boom intermediate portion is complicated, there is no merit unless particularly long boom.
(2)また、前記構造部材の肉厚が不均一であると、クレーンの使用者側における管理・組立上、剛性の異なる部材の誤組付けにより強度的な不均衡を生じ、事故を発生する恐れがある。 (2) Further, when the thickness of the structural member is non-uniform, the management and assembly at the user side of the crane, resulting strength imbalances by erroneous assembling of the different members of rigid, generates an accident there is a risk.

そのため、特に横剛性を向上するには、ブームとクレーン本体との接続部近傍の構造部材の剛性を増加するのが効率的であるが、使用者側からは構造部材同士で互換性があるものが望まれる。 Therefore, those in particularly improved lateral stiffness is to increase the rigidity of the structural member of the connecting portion near the boom and the crane body is efficient, from the user side that is compatible with structural members to each other It is desired. 使用者側の要望を満足させながら剛性を増加させるには、ブーム横断面の外形寸法増加、或いは全構造部材の部材断面寸法増加となり、結果としてブーム重量の増加を招き、吊能力に影響を生じることとなる。 To increase the rigidity while satisfying the desire of the user side, external dimensions increasing boom cross section, or be a member sectional dimension increase in total structural member, as a result causes an increase of the boom weight, it produces an effect on the hanging capacity and thus.

特開昭58−139993号公報 JP-A-58-139993 JP 特開平11−180680号公報 JP 11-180680 discloses

従って、本発明の目的は、多大な重量増加や大きな吊能力の低下を招くことなく、曲げ剛性を増加可能なクレーンのラチスブームを提供することにある。 Accordingly, an object of the present invention is to provide a great without decreasing weight gain and large hanging capacity, bending capable of increasing crane stiffness lattice boom.

即ち、上記目的を達成するために、本発明の請求項1に係るクレーンのラチスブームが採用した手段は、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材の横断面の外形寸法が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材の横断面の外形寸法を越えて構成されてなることを特徴とするものである。 That is, in order to achieve the above object, means for lattice boom cranes adopted according to claim 1 of the present invention, four main pillar, among these four main pillar, main pillar adjacent phases in a lattice boom cranes comprising a plurality of auxiliary diagonal members connected by an inclined state between the timber between outer dimensions of the cross section of the main pillar of the lower boom constituting the lattice boom constitutes the lattice boom intermediate and it is characterized in that formed by constituting beyond the outer dimensions of the cross section of the main pillar of the boom and the upper boom.

本発明の請求項2に係るクレーンのラチスブームが採用した手段は、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材の肉厚が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材の肉厚を越えて構成されてなることを特徴とするものである。 Means for lattice boom cranes adopted according to claim 2 of the present invention, four main pillar, among these four main pillar are connected by an inclined state between the primary post member adjacent phase in crane lattice boom comprising a plurality of auxiliary diagonal member has a wall thickness of the main pillar of the lower boom constituting the lattice boom can exceed the thickness of the main pillar of the intermediate boom and the upper boom constituting the lattice boom those characterized by comprising configured Te.

本発明の請求項3に係るクレーンのラチスブームが採用した手段は、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状に連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材及び補助斜材の横断面の外形寸法が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材及び補助斜材の横断面の外形寸法を夫々越えて構成されてなることを特徴とするものである。 Means for lattice boom cranes adopted according to claim 3 of the present invention, four main pillar, among these four main pillar, is connected to the inclined between primary post member adjacent phase in crane lattice boom comprising a plurality of auxiliary diagonal member has outer dimensions of the cross section of the main pillar and the auxiliary diagonal member of the lower boom constituting the lattice boom is primarily the intermediate boom and the upper boom constituting the lattice boom and it is characterized in that formed by constituting the outer dimension of the cross section of the pillar and the auxiliary diagonal member respectively beyond.

本発明の請求項4に係るクレーンのラチスブームが採用した手段は、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材が、この下部ブームの横断面の左右両側に補剛部材を接合されてなることを特徴とするものである。 Means for lattice boom cranes adopted according to claim 4 of the present invention, four main pillar, among these four main pillar are connected by an inclined state between the primary post member adjacent phase in a lattice boom cranes comprising a plurality of auxiliary diagonal member has a main pillar of the lower boom constituting the lattice boom is a characterized by being joined to stiffening members on the right and left sides of the cross section of the lower boom it is intended to.

本発明の請求項1に係るクレーンのラチスブームは、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材の横断面の外形寸法が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材の横断面の外形寸法を越えて構成されてなるので、下部ブーム構造の簡単な変更によって、ブームの全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム全体の横撓み量を大幅に低減し得る。 Lattice boom crane according to claim 1 of the present invention, four main pillar, among these four main pillar, a plurality of which are connected by an inclined state between the primary post member adjacent phase in a lattice boom cranes made of an auxiliary diagonal members, external dimensions of the cross section of the main pillar of the lower boom constituting the lattice boom is external dimension of the cross section of the main pillar of the intermediate boom and the upper boom constituting the lattice boom since it is configured beyond, by simple changes of the lower boom structure, improved bending stiffness without significantly increasing the overall weight of the boom, can significantly reduce the lateral deflection amount of the entire boom. その結果、特に横撓み量の制限により吊能力を限定されている場合の吊能力の改善が期待できる。 As a result, it can be expected improvement of hanging ability of otherwise specifically limited hanging capacity by a lateral deflection of limitations.

本発明の請求項2に係るクレーンのラチスブームが採用した手段は、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材の肉厚が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材の肉厚を越えて構成されてなるので、上記同様下部ブーム構造の簡単な変更によって、ブームの全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム全体の横撓み量を大幅に低減し得る。 Means for lattice boom cranes adopted according to claim 2 of the present invention, four main pillar, among these four main pillar are connected by an inclined state between the primary post member adjacent phase in crane lattice boom comprising a plurality of auxiliary diagonal member has a wall thickness of the main pillar of the lower boom constituting the lattice boom can exceed the thickness of the main pillar of the intermediate boom and the upper boom constituting the lattice boom since it is configured Te, by simple changes of the same lower boom structure, improved bending stiffness without significantly increasing the overall weight of the boom, can significantly reduce the lateral deflection amount of the entire boom.

本発明の請求項3に係るクレーンのラチスブームが採用した手段は、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状に連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材及び補助斜材の横断面の外形寸法が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材及び補助斜材の横断面の外形寸法を夫々越えて構成されてなるので、ブームの全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム全体の横撓み量を大幅に低減し得る。 Means for lattice boom cranes adopted according to claim 3 of the present invention, four main pillar, among these four main pillar, is connected to the inclined between primary post member adjacent phase in crane lattice boom comprising a plurality of auxiliary diagonal member has outer dimensions of the cross section of the main pillar and the auxiliary diagonal member of the lower boom constituting the lattice boom is primarily the intermediate boom and the upper boom constituting the lattice boom since it is configured the external dimensions of the cross section of the pillar and the auxiliary diagonal member respectively beyond, improved bending stiffness without significantly increasing the overall weight of the boom, it can significantly reduce the lateral deflection amount of the entire boom .

本発明の請求項4に係るクレーンのラチスブームが採用した手段は、4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材が、この下部ブームの横断面の左右両側に補剛部材を接合されてなるので、下部ブームの簡単な補強によって、ブームの全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム全体の横撓み量を大幅に低減し得る。 Means for lattice boom cranes adopted according to claim 4 of the present invention, four main pillar, among these four main pillar are connected by an inclined state between the primary post member adjacent phase in a lattice boom cranes comprising a plurality of auxiliary diagonal member has, since the main pillar of the lower boom constituting the lattice boom is formed by bonding the stiffening member on the left and right sides of the cross-section of the lower boom, lower boom by simple reinforcement, improved bending stiffness without significantly increasing the overall weight of the boom, can significantly reduce the lateral deflection amount of the entire boom. また、既に使用している移動式クレーンに対しても容易に補剛部材を接合して、同等の効果を得ることもできる。 Also, already joined easily stiffening member against mobile crane using, it is also possible to obtain the same effect.

本発明の実施の形態1〜3に係るクレーンのラチスブームであって、各実施の形態に共通しない部分は省略して示す側面図である。 A lattice boom crane according to the first to third embodiments of the present invention, the portion which is not common to each embodiment is a side view showing omitted. 本発明の実施の形態1におけるクレーンのラチスブームに係り、図(a)は図1の矢視X−Xを示す拡大断面図、図(b)は図1の矢視Y−Yを示す拡大断面図、図(c)は図1の矢視Z−Zを示す拡大断面図である。 It relates to a lattice boom of the crane in the first embodiment of the present invention, FIG. (A) is an enlarged sectional view showing the arrow X-X in FIG. 1, FIG. (B) is an enlarged cross section showing the arrow Y-Y in FIG. 1 Figure, Figure (c) is an enlarged sectional view showing the arrow Z-Z in FIG. 本発明の実施の形態1に係る下部ブームの曲げ剛性改善による非線形撓みに対する影響を説明するため、ブームを後方(図1の矢印方向)から見たモデル図であって、図(a)は撓みのない場合、図(b)は下部ブームの剛性が低い場合の撓み状態、図(c)は下部ブームの剛性が高い場合の撓み状態を夫々示している。 To explain the effect on deflection nonlinear due to bending stiffness improvement in the lower boom according to a first embodiment of the present invention, a model view of the boom from the rear (arrow direction in FIG. 1), FIG. (A) deflection If no, (b) shows the deflection state where the rigidity of the lower boom is low, (c) shows each of the bending state when the rigidity of the lower boom is high. 本発明の実施の形態2におけるクレーンのラチスブームに係り、図(a)は図1の矢視X−Xを示す拡大断面図、図(b)は図1の矢視Y−Yを示す拡大断面図、図(c)は図1の矢視Z−Zを示す拡大断面図である。 Relates to a lattice boom crane according to the second embodiment of the present invention, FIG. (A) is an enlarged sectional view showing the arrow X-X in FIG. 1, FIG. (B) is an enlarged cross section showing the arrow Y-Y in FIG. 1 Figure, Figure (c) is an enlarged sectional view showing the arrow Z-Z in FIG. 本発明の実施の形態3におけるクレーンのラチスブームに係り、図(a)は図1の矢視A−Aを示す拡大断面図、図(b)は図1の矢視B−Bを示す拡大断面図、図(c)は図1の矢視C−Cを示す拡大断面図である It relates to a lattice boom cranes in the third embodiment of the present invention, FIG. (A) is an enlarged sectional view showing the arrow A-A of FIG. 1, FIG. (B) is an enlarged cross section showing the arrow B-B in FIG. 1 Figure, Figure (c) is an enlarged sectional view showing the arrow C-C in FIG. 1 本発明の実施の形態4におけるクレーンのラチスブームに係り、図(a)は図1の矢視X−Xの態様を示す拡大断面図、図(b)は図1の矢視X−Xの他の態様を示す拡大断面図である。 Relates to a lattice boom of the crane according to the fourth embodiment of the present invention, FIG. (A) is an enlarged sectional view showing an aspect of the arrow X-X in FIG. 1, FIG. (B) another arrow X-X in FIG. 1 is an enlarged sectional view showing an aspect of. 従来例に係るラチスブームを有する一般的な移動式クレーンを示す側面図である。 It is a side view showing a general mobile crane having a lattice boom according to a conventional example. 従来技術1に係るラチス型ブームの一部分解斜視図である。 It is a partially exploded perspective view of a lattice boom according to the prior art 1. 図(a)は図8の補助斜材にかかる軸力の分布グラフ、図(b)は図(a)の軸力分布グラフに対応して補助斜材に番号を付した説明図である。 Figure (a) is distribution graph of the axial force applied to the auxiliary diagonal members in FIGS. 8 and (b) are explanatory views numbered to correspond to the auxiliary slant member in the axial power distribution in the graph of FIG. (A). 従来技術2の実施の形態に係り、図(a)は四角鋼管の横断面図、図(b)はラチスブームの主柱材と補助斜材との溶接部説明斜視図である。 Relates to the embodiment of the prior art 2, Fig. (A) is a cross-sectional view of a square steel tube, (b) shows a weld explanatory perspective view of the main pillar of the lattice boom auxiliary diagonal member.

次に、本発明の実施の形態1に係るクレーンのラチスブームの構成を、添付図1,2を参照しながら説明する。 Next, the configuration of the lattice boom crane according to the first embodiment of the present invention will be described with reference to the accompanying drawings 1 and 2. 図1は本発明の実施の形態1〜3に係るクレーンのラチスブームであって、各実施の形態に共通しない部分は省略して示す側面図である。 Figure 1 is a lattice boom crane according to the first to third embodiments of the present invention, the portion which is not common to each embodiment is a side view showing omitted. 図2は本発明の実施の形態1におけるクレーンのラチスブームに係り、図(a)は図1の矢視X−Xを示す拡大断面図、図(b)は図1の矢視Y−Yを示す拡大断面図、図(c)は図1の矢視Z−Zを示す拡大断面図である。 Figure 2 relates to a lattice boom of the crane in the first embodiment of the present invention, FIG. (A) is an enlarged sectional view showing the arrow X-X in FIG. 1, the arrow Y-Y in FIG. (B) Figure 1 enlarged cross-sectional view showing, Fig. (c) is an enlarged sectional view showing the arrow Z-Z in FIG.

この移動式クレーンのラチスブーム1は、下から下部ブーム2、中間ブーム3及び上部ブーム4と呼ばれる3種の構造部材から構成され、前記下部ブームの下端に設けられたブーム基端部1aが、クレーン本体9に回動可能に取り付けられる。 Lattice boom 1 in the mobile crane, the lower boom 2 from the bottom, is composed of three kinds of structural members called intermediate boom 3 and the upper boom 4, the boom base end portion 1a provided at the lower end of the lower boom, crane pivotally mounted body 9. 前記中間ブーム3は、第1中間ブーム3a、図示省略した第2中間ブーム及び第3中間ブーム3cに3分割可能に構成されている。 The intermediate boom 3, the first intermediate boom 3a, and is 3 dividable structure in the second intermediate boom and a third intermediate boom 3c (not shown).

上記各構造部材の横断面の外形形状は、図2に示す如く略矩形状をなし、この矩形状断面の4隅にパイプ部材からなる4本の主柱材5が配設されると共に、これら4本の主柱材5のうち、相隣り合う主柱材5同士の間に複数本のパイプ部材からなる補助斜材6が傾斜状態に連結されて、各構造部材が構成されている。 Outer shape of the cross section of each structural member has a substantially rectangular shape as shown in FIG. 2, together with the main pillar 5 of four consisting of the pipe member to the four corners of the rectangular cross section is disposed, these four of the main pillar 5, the auxiliary diagonal members 6 is connected to the inclined state consisting of a plurality of pipe members between the primary posts member 5 adjacent phases, each structural member is constructed. そして、前記各構造部材の主柱材5の端部にピン結合して連結可能に構成されている。 Then, and is configured to be connected above with an end portion of the main column member 5 pinned to each structural member.

そして、本発明の実施の形態1に係るクレーンのラチスブーム1は、このラチスブーム1を構成する下部ブーム2の主柱材5の横断面において、この主柱材5の外形寸法である外径D1が、前記ラチスブーム1を構成する中間ブーム3の主柱材5の横断面の外形寸法である外径D2、更には上部ブーム4の主柱材5の横断面の外形寸法である外径D3を越えて構成されている。 The lattice boom 1 crane according to the first embodiment of the present invention, in cross-section of the main column member 5 of the lower boom 2 constituting the lattice boom 1, an outer diameter D1 which is external dimensions of the main pillar 5 , beyond the outer diameter D3 outer diameter D2 which is external dimensions of the cross section of the main column member 5 of the intermediate boom 3, is still more external dimensions of the cross section of the main column member 5 of the upper boom 4 constituting the lattice boom 1 It is configured Te. この様に下部ブーム2のみの左右の曲げ剛性を増加させることによって、ブーム1の全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム1全体の横撓み量を大幅に低減し得る。 By increasing the lateral bending stiffness of only the lower boom 2 in this manner improves the bending stiffness without significantly increasing the overall weight of the boom 1 can significantly reduce the lateral deflection amount of the entire boom 1. その結果、特に横撓み量の制限により吊能力を限定されている場合の吊能力の改善が期待できる。 As a result, it can be expected improvement of hanging ability of otherwise specifically limited hanging capacity by a lateral deflection of limitations.

尚、上記において、ラチスブーム1を構成する主柱材5がパイプ部材から構成されているため、このブーム1の主柱材5の横断面の外形寸法を外径としたが、前記ラチスブーム1を構成する主柱材5が四角鋼管等の多角鋼管から構成される場合は、このブーム1の主柱材5の横断面の外形寸法としては、前記多角鋼管の辺の寸法とすれば良い。 It should be noted that the configuration in the above, since the primary post member 5 constituting the lattice boom 1 is composed of a pipe member, but the outer dimensions of the cross section of the main column member 5 of the boom 1 and the outer diameter, the lattice boom 1 If primary post member 5 is composed of a polygonal steel pipes, such as square steel pipe as the outer dimension of the cross section of the main column member 5 of the boom 1 may be the dimensions of the sides of the polygonal steel pipes.

下部ブーム2の係る曲げ剛性の改善によって、ブーム変形の非線形性により生じる横撓みに対する作用について、以下図3を参照しながら説明する。 The improved bending stiffness according the lower boom 2, the operation with respect to the lateral deflection caused by the nonlinearity of the boom deformation, is described with reference to FIG. 3 below. 図3は本発明の実施の形態1に係る下部ブームの曲げ剛性改善による非線形撓みに対する影響を説明するため、ブームを後方(図1の矢印方向)から見たモデル図であって、図(a)は撓みのない場合、図(b)は下部ブームの剛性が低い場合の撓み状態、図(c)は下部ブームの剛性が高い場合の撓み状態を夫々示している。 Figure 3 is a for explaining the effect on deflection nonlinear due to bending stiffness improvement of the lower boom, the model viewed boom from the rear (arrow direction in FIG. 1) diagram according to a first embodiment of the present invention, FIG. (A ) If no deflection, (b) shows the deflection state where the rigidity of the lower boom is low, (c) shows each of the bending state when the rigidity of the lower boom is high. 尚、図3(b),(c)共、吊荷重Wの2%の荷重をブームの水平横方向に与えている。 Incidentally, FIG. 3 (b), giving a horizontal lateral 2% boom load (c) both suspended load W.

図3において、吊荷重Wがブーム1の先端1bに荷重点Pとして負荷されるモデルを考える。 3, consider a model in which suspended load W is loaded as a load point P to the tip 1b of the boom 1. 下部ブームの剛性が低い場合は、下部ブームの変形により撓みが生じたときに、例えば図2(b)に示す如く、荷重点Pがブーム軸線上右方向に変位Δδ1だけずれる。 If the rigidity of the lower boom is low, when the resulting deflection by deformation of the lower boom, for example, as shown in FIG. 2 (b), the load point P is shifted by a displacement to the boom axis rightward Derutaderuta1. この結果、更にブーム1を曲げるW×Δδ1の曲げモーメントが荷重点1aに作用するため、中間ブーム該当部が弾性変形を生じて、ブーム先端1bの撓み量δ1は変位Δδ1より大幅に増大する(下部ブームの傾き角に比例した値より大幅に上回る)。 As a result, the further bending moment W × Δδ1 bending boom 1 is applied to the load point 1a, the intermediate boom relevant portion is elastically deformed, the deflection amount δ1 of the boom tip 1b significantly increased than the displacement Derutaderuta1 ( significantly higher than than the value that is proportional to the angle of inclination of the lower boom).

一方、下部ブームの剛性を高くした場合は、下部ブーム自身の傾き角が小さくなるだけでなく、荷重点1bの変位Δδ2が前記撓み量Δδ1より小さくなるため、結果として、W×Δδ2で表される曲げモーメントが小さくなり、中間ブーム該当部の弾性変形が抑制されるという大きな効果が期待できる。 On the other hand, if the rigidity of the lower boom, as well as the inclination angle of the lower boom itself is reduced, the displacement of the load point 1b Derutaderuta2 is smaller than the deflection amount Δδ1 said, as a result, expressed in W × Δδ2 that the bending moment is small, a large effect of elastic deformation of the intermediate boom relevant portion is suppressed can be expected. しかも、下部ブームの主柱材は、ブーム最下部の部材であるため、質量が多少増加したとしても、ブーム1の重心位置がややクレーン本体に近づくため、吊能力への影響は極めて少ない。 Moreover, the main pillar of the lower boom, because the boom is lowermost member, even as the mass is slightly increased, since the center of gravity of the boom 1 approaches somewhat crane body, very little impact on the hanging capacity.

この様に、本発明の実施の形態1に係るクレーンのラチスブーム1は、このラチスブーム1を構成する下部ブーム2の主柱材5の外径D1が、前記ラチスブーム1を構成する中間ブーム3の主柱材5の外径D2及び上部ブーム4の主柱材5の外径D3を越えて構成されてなるので、下部ブーム2構造の簡単な変更によって、ブーム1の全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム1全体の横撓み量を大幅に低減し得る。 Thus, lattice boom 1 crane according to the first embodiment of the present invention, the outer diameter D1 of the main pillar 5 of the lower boom 2 constituting the lattice boom 1, the main intermediate boom 3 constituting the lattice boom 1 since it is configured beyond the outer diameter D3 of the main pillar 5 with an outer diameter D2 and an upper boom 4 pillar 5, by a simple change of the lower boom 2 structure, without significantly increasing the overall weight of the boom 1 bending improve rigidity may significantly reduce the lateral deflection amount of the entire boom 1. その結果、特に横撓み量の制限により吊能力を限定されている場合の吊能力の改善が期待できる。 As a result, it can be expected improvement of hanging ability of otherwise specifically limited hanging capacity by a lateral deflection of limitations.

次に、本発明の実施の形態2に係るクレーンのラチスブームを、添付図4を参照しながら説明する。 Then, the lattice boom crane according to the second embodiment of the present invention will be described with reference to the accompanying Figure 4. 図4は本発明の実施の形態2におけるクレーンのラチスブームに係り、図(a)は図1の矢視X−Xを示す拡大断面図、図(b)は図1の矢視Y−Yを示す拡大断面図、図(c)は図1の矢視Z−Zを示す拡大断面図である。 Figure 4 relates to a crane lattice boom according to the second embodiment of the present invention, FIG. (A) is an enlarged sectional view showing the arrow X-X in FIG. 1, the arrow Y-Y in FIG. (B) Figure 1 enlarged cross-sectional view showing, Fig. (c) is an enlarged sectional view showing the arrow Z-Z in FIG.

但し、本発明の実施の形態2が上記実施の形態1と相違するところは、下部ブームを構成する主柱材に相違があり、この相違以外は上記実施の形態1と全く同構成であるから、上記実施の形態1と同一のものに同一符号を付して、以下その相違する点について説明する。 However, where the second embodiment of the present invention is different from the first embodiment, there is difference in primary post material constituting the lower boom, because except this difference is exactly the same structure as the first embodiment , the same reference numerals to the same as the first embodiment, will be described a point of the difference below.

即ち、上記実施の形態1においては、このラチスブーム1を構成する下部ブーム2の主柱材5の横断面において、この主柱材5の外形寸法である外径D1が、前記ラチスブーム1を構成する中間ブーム3の主柱材5の横断面の外形寸法である外径D2、更には上部ブーム4の主柱材5の横断面の外形寸法である外径D3を越えて構成されていた。 That is, in the first embodiment, in cross-section of the main column member 5 of the lower boom 2 constituting the lattice boom 1, an outer diameter D1 which is external dimensions of the main pillar 5 constitute the lattice boom 1 outer diameter D2 which is external dimensions of the cross section of the main column member 5 of the intermediate boom 3, were composed even beyond the outer diameter D3 is external dimensions of the cross section of the main column member 5 of the upper boom 4.

これに対し、本発明の実施の形態2においては、このラチスブーム1を構成する下部ブーム2の主柱材5の肉厚T1が、前記ラチスブーム1を構成する中間ブーム3の主柱材5の肉厚T2、更には上部ブーム4の主柱材5の肉厚T3を越えて構成されている。 In contrast, in the second embodiment of the present invention, the thickness T1 of the main pillar 5 of the lower boom 2 constituting the lattice boom 1, the meat of the main pillar 5 intermediate boom 3 constituting the lattice boom 1 the thickness T2, and is configured further beyond the wall thickness T3 of the main pillar 5 of the upper boom 4. 下部ブーム2構造のこの様な変更によって、ブーム1の全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム1全体の横撓み量を大幅に低減し得る。 By such changes of the lower boom 2 structure, improved bending stiffness without significantly increasing the overall weight of the boom 1 can significantly reduce the lateral deflection amount of the entire boom 1.

次に、本発明の実施の形態3に係るクレーンのラチスブームを、添付図5を参照しながら説明する。 Then, the lattice boom crane according to a third embodiment of the present invention will be described with reference to the accompanying Figure 5. 図5は本発明の実施の形態3におけるクレーンのラチスブームに係り、図(a)は図1の矢視A−Aを示す拡大断面図、図(b)は図1の矢視B−Bを示す拡大断面図、図(c)は図1の矢視C−Cを示す拡大断面図である。 Figure 5 relates to a lattice boom cranes in the third embodiment of the present invention, FIG. (A) is an enlarged sectional view showing the arrow A-A of FIG. 1, FIG. (B) is an arrow B-B in FIG. 1 enlarged cross-sectional view showing, Fig. (c) is an enlarged sectional view showing the arrow C-C of FIG.

但し、本発明の実施の形態3が上記実施の形態1と相違するところは、下部ブームを構成する補助斜材に相違があり、この相違以外は上記実施の形態1と全く同構成であるから、上記実施の形態1と同一のものに同一符号を付して、以下その相違する点について説明する。 However, where the third embodiment of the present invention is different from the first embodiment, there is a difference in the auxiliary diagonal members constituting the lower boom, because except this difference is exactly the same structure as the first embodiment , the same reference numerals to the same as the first embodiment, will be described a point of the difference below.

即ち、上記実施の形態1においては、このラチスブーム1を構成する下部ブーム2の主柱材5の横断面において、この主柱材5の外形寸法である外径D1が、前記ラチスブーム1を構成する中間ブーム3の主柱材5の横断面の外形寸法である外径D2、更には上部ブーム4の主柱材5の横断面の外形寸法である外径D3を越えて構成されていた。 That is, in the first embodiment, in cross-section of the main column member 5 of the lower boom 2 constituting the lattice boom 1, an outer diameter D1 which is external dimensions of the main pillar 5 constitute the lattice boom 1 outer diameter D2 which is external dimensions of the cross section of the main column member 5 of the intermediate boom 3, were composed even beyond the outer diameter D3 is external dimensions of the cross section of the main column member 5 of the upper boom 4.

これに対し、本発明の実施の形態3においては、上記下部ブーム2の主柱材5の横断面の外形寸法に加えて、上記下部ブーム2の補助斜材6の横断面の外形寸法である外径d1が、前記ラチスブーム1を構成する中間ブーム3の補助斜材6の横断面の外形寸法である外径d2、更には上部ブーム4の補助斜材6の横断面の外形寸法である外径d3を越えて構成されている。 In contrast, in the third embodiment of the present invention, in addition to the external dimensions of the cross section of the main pillar 5 of the lower boom 2 is the external dimension of the cross section of the auxiliary diagonal members 6 of the lower boom 2 outer outer diameter d1 and an outer diameter d2 which is external dimensions of the cross section of the auxiliary diagonal members 6 of the intermediate boom 3 constituting the lattice boom 1, even at external dimensions of the cross section of the auxiliary diagonal members 6 of the upper boom 4 It is configured across the diameter d3. この結果、ブームの全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム全体の横撓み量を大幅に低減し得る。 As a result, it improved bending stiffness without significantly increasing the overall weight of the boom, can significantly reduce the lateral deflection amount of the entire boom.

次に、本発明の実施の形態4に係るクレーンのラチスブームを、添付図5を参照しながら説明する。 Then, the lattice boom crane according to the fourth embodiment of the present invention will be described with reference to the accompanying Figure 5. 図6は本発明の実施の形態4におけるクレーンのラチスブームに係り、図(a)は図1の矢視X−Xの態様を示す拡大断面図、図(b)は図1の矢視X−Xの他の態様を示す拡大断面図である。 Figure 6 relates to a lattice boom of the crane according to the fourth embodiment of the present invention, FIG. (A) is an enlarged sectional view showing an aspect of the arrow X-X in FIG. 1, FIG. (B) the arrow in FIG. 1 X- it is an enlarged sectional view showing another embodiment of X.

但し、本発明の実施の形態4が上記実施の形態1と相違するところは、下部ブームを構成する主柱材に相違があり、この相違以外は上記実施の形態1と全く同構成であるから、上記実施の形態1と同一のものに同一符号を付して、以下その相違する点について説明する。 However, when the fourth embodiment of the present invention is different from the first embodiment, there is difference in primary post material constituting the lower boom, because except this difference is exactly the same structure as the first embodiment , the same reference numerals to the same as the first embodiment, will be described a point of the difference below.

即ち、上記実施の形態1においては、このラチスブーム1を構成する下部ブーム2の主柱材5の横断面において、この主柱材5の外形寸法である外径D1が、前記ラチスブーム1を構成する中間ブーム3の主柱材5の横断面の外形寸法である外径D2、更には上部ブーム4の主柱材5の横断面の外形寸法である外径D3を越えて構成されていた。 That is, in the first embodiment, in cross-section of the main column member 5 of the lower boom 2 constituting the lattice boom 1, an outer diameter D1 which is external dimensions of the main pillar 5 constitute the lattice boom 1 outer diameter D2 which is external dimensions of the cross section of the main column member 5 of the intermediate boom 3, were composed even beyond the outer diameter D3 is external dimensions of the cross section of the main column member 5 of the upper boom 4.

これに対し、本発明の実施の形態4においては、このラチスブーム1を構成する下部ブーム2の主柱材5が、この下部ブーム2の横断面の左右両側に、図6(a)に示す如くアングル材(補剛部材)7を溶接接合されたり、或いは図6(b)に示す如くパイプ材(補剛部材)8を溶接接合されて補剛されるものである。 In contrast, in the fourth embodiment of the present invention, the main column member 5 of the lower boom 2 constituting the lattice boom 1, the left and right sides of the cross section of the lower boom 2, as shown in FIG. 6 (a) angle member or joined by welding (the stiffening member) 7, or a pipe material as shown in FIG. 6 (b) (stiffener) 8 are welded are those stiffened. この場合、前記下部ブーム2の主柱材5は、この下部ブーム2の横断面の左右両側に、前記保剛部材7,8を溶接接合することが、横撓み量を低減する上で肝要である。 In this case, the main pillar 5 of the lower boom 2, the left and right sides of the cross section of the lower boom 2, welding joining the TamotsuTsuyoshi member 7 and 8, is important in reducing the lateral deflection amount is there.

この様な下部ブーム2の簡単な補強によって、ブーム1の全体重量を大きく増加させることなく曲げ剛性を改善し、ブーム1全体の横撓み量を大幅に低減し得る。 By a simple reinforcement of such lower boom 2, improved bending stiffness without significantly increasing the overall weight of the boom 1 can significantly reduce the lateral deflection amount of the entire boom 1. また、既に使用している移動式クレーンに対しても容易に補剛部材を接合して、同等の効果を得ることもできる。 Also, already joined easily stiffening member against mobile crane using, it is also possible to obtain the same effect. 尚、ラチスブーム1の前後方向の撓みは、このブーム1に掛け回された吊荷用ロープを作業者が操作することによって調整可能であるため、特に設備的な対応は必要としない。 Incidentally, the deflection in the longitudinal direction of the lattice boom 1, this hanging around the load-suspending rope to the boom 1 for can be adjusted by manipulating the operator, not particularly facilities intended action is required.

以上、本発明の実施の形態1,2においては、下部ブームの主柱材の外径寸法または肉厚が、中間ブーム及び上部ブームの主柱材の外形寸法または肉厚を夫々超えて構成される例で説明したが、下部ブームの主柱材の外径寸法及び肉厚が、中間ブーム及び上部ブームの主柱材の外形寸法及び肉厚を夫々超えて構成されても良い。 Above, in the first and second embodiments of the present invention, the outer diameter or wall thickness of the main pillar of the lower boom is configured with external dimensions or thickness of the main pillar of the intermediate boom and upper boom, respectively beyond that has been described in example, the outer diameter and wall thickness of the main pillar of the lower boom may be configured with external dimensions and thickness of the main pillar of the intermediate boom and upper boom, respectively beyond. また、本発明の実施の形態3においては、下部ブームの主柱材及び補助斜材の横断面の外形寸法が、中間ブーム及び上部ブームの主柱材及び補助斜材の横断面の外形寸法を夫々越えて構成される例で説明したが、下部ブームの主柱材及び補助斜材の肉厚が、中間ブーム及び上部ブームの主柱材及び補助斜材の肉厚を夫々越えて構成されても良い。 In the third embodiment of the present invention, external dimensions of the cross section of the main pillar and the auxiliary diagonal member of the lower boom, the external dimensions of the cross section of the main pillar and the auxiliary diagonal member of the intermediate boom and the upper boom has been described in the respective beyond constructed example, the thickness of the main pillar and the auxiliary diagonal member of the lower boom, is configured the thickness of the main pillar and the auxiliary diagonal member of the intermediate boom and upper boom, respectively beyond it may be.

D1,D2,D3:主柱材の外径(横断面の外形寸法), D1, D2, D3: (Dimensions of the cross-section) the outer diameter of the main pillar,
d1,d2,d3:補助斜材の外径(横断面の外形寸法), d1, d2, d3: (Dimensions of the cross-section) the outer diameter of the auxiliary diagonal member,
T1,T2,T3:主柱材の肉厚, T1, T2, T3: the thickness of the main pillar,
P:荷重点, W:吊荷重, P: load point, W: suspended load,
δ1,δ2:ブーム先端の撓み量, δ1, δ2: the boom tip deflection amount,
Δδ1,Δδ2:荷重点1bの変位, Δδ1, Δδ2: the displacement of the load point 1b,
1:ラチスブーム(ブーム), 1a:ブーム基端部, 1b:ブームの先端, 1: lattice boom (boom), 1a: the boom base end portion, 1b: the boom tip,
2:下部ブーム, 2: lower boom,
3:中間ブーム, 3a:第1中間ブーム, 3c:第3中間ブーム, 3: intermediate boom 3a: first intermediate boom, 3c: third intermediate boom,
4:上部ブーム, 4: Top boom,
5:主柱材, 6:補助斜材, 5: The main pillar, 6: auxiliary diagonal members,
7:アングル材(補剛部材), 8:パイプ材(補剛部材), 7: angle member (stiffener), 8: pipe member (stiffener),
9:クレーン本体 9: crane body

Claims (4)

  1. 4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材の横断面の外形寸法が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材の横断面の外形寸法を越えて構成されてなることを特徴とするクレーンのラチスブーム。 Four main pillar, among these four main pillar, the lattice boom crane comprising a plurality of auxiliary diagonal members connected by an inclined state between the primary post member adjacent phases, the lattice boom cranes external dimensions of the cross section of the main pillar of the lower boom, characterized by comprising constructed beyond the outer dimensions of the cross section of the main pillar of the intermediate boom and the upper boom constituting the lattice boom constituting a lattice boom of.
  2. 4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材の肉厚が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材の肉厚を越えて構成されてなることを特徴とするクレーンのラチスブーム。 Four main pillar, among these four main pillar, the lattice boom crane comprising a plurality of auxiliary diagonal members connected by an inclined state between the primary post member adjacent phases, the lattice boom the thickness of the main pillar of the lower boom constituting the found lattice boom crane, characterized by comprising constructed beyond the thickness of the main pillar of the intermediate boom and the upper boom constituting the lattice boom.
  3. 4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状に連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材及び補助斜材の横断面の外形寸法が、前記ラチスブームを構成する中間ブーム及び上部ブームの主柱材及び補助斜材の横断面の外形寸法を夫々越えて構成されてなることを特徴とするクレーンのラチスブーム。 Four main pillar, among these four main pillar, the lattice boom crane comprising a plurality of auxiliary diagonal members coupled to inclined between primary post member adjacent phases, the lattice boom dimensions of the cross section of the main pillar and the auxiliary diagonal member of the lower boom constituting a can form the outer shape dimension of the cross section of the main pillar and the auxiliary diagonal member of the intermediate boom and the upper boom constituting the lattice boom respectively beyond lattice boom cranes, characterized in that formed by.
  4. 4本の主柱材と、これら4本の主柱材のうち、相隣り合う主柱材同士の間に傾斜状態で連結された複数本の補助斜材とからなるクレーンのラチスブームにおいて、このラチスブームを構成する下部ブームの主柱材が、この下部ブームの横断面の左右両側に補剛部材を接合されてなることを特徴とするクレーンのラチスブーム。 Four main pillar, among these four main pillar, the lattice boom crane comprising a plurality of auxiliary diagonal members connected by an inclined state between the primary post member adjacent phases, the lattice boom lattice boom main pillar of the lower boom constituting the, crane, characterized in that formed by bonding the stiffening member on the right and left sides of the cross section of the lower boom.
























JP2009104212A 2009-04-22 2009-04-22 Lattice boom of crane Pending JP2010254398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009104212A JP2010254398A (en) 2009-04-22 2009-04-22 Lattice boom of crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009104212A JP2010254398A (en) 2009-04-22 2009-04-22 Lattice boom of crane

Publications (1)

Publication Number Publication Date
JP2010254398A true true JP2010254398A (en) 2010-11-11

Family

ID=43315798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009104212A Pending JP2010254398A (en) 2009-04-22 2009-04-22 Lattice boom of crane

Country Status (1)

Country Link
JP (1) JP2010254398A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102491195A (en) * 2011-12-22 2012-06-13 上海三一科技有限公司 Reinforcing jib frame structure of truss-jib crane and crane comprising reinforcing jib frame structure
CN102502426A (en) * 2011-10-20 2012-06-20 中联重科股份有限公司 Crane boom and crane
CN102674168A (en) * 2011-03-15 2012-09-19 徐工集团工程机械股份有限公司建设机械分公司 Reinforced boom and crane with reinforced boom
CN106494999A (en) * 2016-12-13 2017-03-15 常守祥 Light main beam of crane

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50118450A (en) * 1974-02-28 1975-09-17
JPS62186888U (en) * 1986-05-19 1987-11-27

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50118450A (en) * 1974-02-28 1975-09-17
JPS62186888U (en) * 1986-05-19 1987-11-27

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102674168A (en) * 2011-03-15 2012-09-19 徐工集团工程机械股份有限公司建设机械分公司 Reinforced boom and crane with reinforced boom
CN102502426A (en) * 2011-10-20 2012-06-20 中联重科股份有限公司 Crane boom and crane
CN102491195A (en) * 2011-12-22 2012-06-13 上海三一科技有限公司 Reinforcing jib frame structure of truss-jib crane and crane comprising reinforcing jib frame structure
CN106494999A (en) * 2016-12-13 2017-03-15 常守祥 Light main beam of crane

Similar Documents

Publication Publication Date Title
US20060101733A1 (en) Buckling-restrained diagonal brace using lapping and improved plugging connection
US5913794A (en) Ductile steel beam-to-column connection
CN201433511Y (en) Lattice-type special-shaped steel pipe concrete column
JP2008240368A (en) Reinforced concrete column reinforcing structure
KR101169459B1 (en) Steel beam connector and steel beam structure using the same
CN202416586U (en) Beam-end cover plate reinforced-bolted splice joint for steel framework
CN1560393A (en) Connection structure of connection of floor beam and steel pipe concrece pole and construction method thereof
CN102287017A (en) Shear stiffening metal damper
JP2007223699A (en) Derricking member for construction machine
CN101638916A (en) Connecting joint of coating composite steel concrete transformation column with composite steel concrete transformation box beam
JP2005344289A (en) Column-base metal fitting
JP2009249990A (en) Column-beam joint structure and column-beam joining method
JP2002266317A (en) Continuous girder for bridge
CN2753823Y (en) Angle steel buckling-free energy-dissipating support
CN1963104A (en) Profiled steel concrete profiled pile and method for making same
US20090107939A1 (en) Display Rack
CN2701931Y (en) Joint structure of concrete filled steel tubular column and floor beam
US4494351A (en) Booms for cranes or the like
JPH08144284A (en) Landslide protection wall timbering
CN2481757Y (en) Precast X-type reinforced concrete pile
CN1975061A (en) Steel reinforcement square, rectangular or polygonal steel pipe concrete column
KR20020076558A (en) Frp stiffener for supporting block of block type retaing wall and retaing wall structure used frp stiffener
US6871469B2 (en) Triangulation of a lattice girder, in particular of a jib element for a tower crane
CN203639936U (en) Fabricated concrete foundation
CN101560837A (en) Method for consolidating tilting combination structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20111209

A977 Report on retrieval

Effective date: 20130517

Free format text: JAPANESE INTERMEDIATE CODE: A971007

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130521

A02 Decision of refusal

Effective date: 20131001

Free format text: JAPANESE INTERMEDIATE CODE: A02