JPS6061289U - Lattice boom for mobile crane - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の対象の一例であるタワークレーンを示
す側面図、第２図は第１図のタワークレーンのラチスブ
ームを構成する従来の繋ぎブームの端部を示す斜視図、
第３図は第２図の繋ぎブームの断面図、第４図は繋ぎブ
ームに繋ぎジブを納めた状態を示す正面図、第５図は本
考案の一実施例を示す断面図、第６図は該実施例におい
て対角材を取外した状態を示す断面図、第７図は本考案
の他の実施例を示す断面図、第８図は第７図の変形例を
示す断面図である。 Ａ・・・ラチスブーム、９ａ〜９ｄ・・・主材、１６・
・・対角材、２１．２２・・・対角材素体、１６ａ、１
６ｂ、１９，２０，２１ｂ、２２ｂ、２４，２５・・・
ナツト、１７．１８．２１ａ、２２ａ、２３，２６．２
７・・・ボルト。 會FIG. 1 is a side view showing a tower crane which is an example of the object of the present invention, and FIG. 2 is a perspective view showing the end of a conventional connecting boom that constitutes the lattice boom of the tower crane shown in FIG.
Fig. 3 is a sectional view of the tethering boom shown in Fig. 2, Fig. 4 is a front view showing the state in which the tethering jib is stored in the tethering boom, Fig. 5 is a sectional view showing an embodiment of the present invention, and Fig. 6. 7 is a sectional view showing another embodiment of the present invention, and FIG. 8 is a sectional view showing a modification of FIG. 7. A... Lattice boom, 9a-9d... Main material, 16.
...Diagonal material, 21.22...Diagonal material material, 16a, 1
6b, 19, 20, 21b, 22b, 24, 25...
Natsu, 17.18.21a, 22a, 23, 26.2
7...Bolt. meeting

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 断面形状が矩形をなす構造を有し、かつブームの対角線
方向に対向する主材間に着脱可能に対角材を取付けてな
る移動式クレーン用ラチスブームにおいて、前記対角材
の中間部または両端部に、左ねじ、左ねじを有して互い
に螺合されるボルト、ナツトを設けて該ボルトのナツト
に対するねじ込み深さを変えることにより該ボルト、ナ
ツトを含む対角材総長が変えられる構造を有し、かつ、
該対角材の両端に設けたボルトまたはナツト′と前記対
角線方向に対向する主材に設けたナツトまたはボルトと
を螺合することにより該対角材が前記主材間に取付けら
れる構造を有することを特徴とする移動式クレーン用ラ
チスブーム。In a lattice boom for a mobile crane, which has a structure with a rectangular cross-sectional shape and has a diagonal member removably attached between main members facing each other in the diagonal direction of the boom, in the middle part or both ends of the diagonal member, It has a structure in which the total length of the diagonal including the bolt and nut can be changed by providing a bolt and a nut having a left-hand thread and a left-hand thread and screwed together, and changing the screwing depth of the bolt into the nut, and ,
The diagonal member has a structure in which the diagonal member is attached between the main members by screwing together bolts or nuts provided at both ends of the diagonal member and nuts or bolts provided on the main member facing in the diagonal direction. Characteristic lattice boom for mobile cranes.