JPS634992U - - Google Patents

Description

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

第１図及び第２図は本考案一実施例要部の縦断
側面図及びその下面図、第３図は第１図の―
断面図、第４図はブームの俯仰作用を示す側面図
、第５図は従来型自走式クレーンの側面図、第６
図及び第７図は夫々縦断して示す第５図Ｙ部の詳
細図、第８図は第６図のＺ―Ｚ断面図である。 ７……旋回台、８……ピン、１０……ブーム、
１１……クレーン及び自動車制御用運転室。 Figures 1 and 2 are longitudinal sectional side views and bottom views of the main parts of an embodiment of the present invention, and Figure 3 is the same as in Figure 1.
4 is a side view showing the elevating action of the boom, 5 is a side view of a conventional self-propelled crane, and 6 is a sectional view.
7 and 7 are detailed views of the section Y in FIG. 5 shown in longitudinal section, and FIG. 8 is a sectional view taken along the Z-Z line in FIG. 6. 7...Swivel base, 8...Pin, 10...Boom,
11... Crane and vehicle control cab.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] シリンダ後端が旋回台に連結されたデリツクシ
リンダをブームの基部下方に配設して、そのピス
トンロツド前端のブーム側連結金具が、ブームの
水平状態においてクレーン及び自動車制御用の運
転室前端部より前側方に位置するように構成した
自走式クレーンにおいて、ピストンロツド１を連
結するピン２の挿通孔から前端までの上辺長さＡ
が該挿通孔から後端までの上辺長さＢより大きい
左右一対の三角形状の第１ブラケツト３，３の外
側に、夫々前端内角θと前記ピン２の挿通孔から
前端までの上辺長さＣとが三角形状の第１ブラケ
ツト３のそれと略等しく、しかも該挿通孔から後
端までの上辺長さＤが該上辺長さＣより著しく大
きい三角形状の第２ブラケツト４を一体に固着し
、該第１、第２のブラケツト３，４の上辺をブー
ム下面に溶着すると共に、ブーム底板を介してそ
の両側板１０ａ，１０ａ間をつなぐよう該ブーム
下面に密着固定した受圧板５の下面に該第１、第
２のブラケツトの前端部を溶着して、左右の第１
ブラケツト３，３間でピストンロツド前端のピン
挿通部分１ａを回動自在に挾持すると共に、左右
の第２ブラケツト４，４間にデリツクシリンダ６
のシリンダ前端部が嵌り込む間隔を持つブーム側
連結金具を構成させたことを特徴とする自走式ク
レーン。 A derrick cylinder whose rear end is connected to a swivel table is installed below the base of the boom, and the boom-side connecting fitting at the front end of the piston rod is located in front of the front end of the driver's cab for crane and vehicle control when the boom is in a horizontal state. In a self-propelled crane configured to be located on the side, the upper side length A from the insertion hole of the pin 2 connecting the piston rod 1 to the front end
is larger than the upper side length B from the insertion hole to the rear end.A pair of left and right triangular first brackets 3, 3 has a front end inner angle θ and an upper side length C from the insertion hole of the pin 2 to the front end, respectively. A second bracket 4 having a triangular shape, which is approximately equal to that of the first bracket 3 having a triangular shape, and whose upper side length D from the insertion hole to the rear end is significantly larger than the upper side length C, is integrally fixed. The upper sides of the first and second brackets 3 and 4 are welded to the lower surface of the boom, and the lower surface of the pressure receiving plate 5 is tightly fixed to the lower surface of the boom so as to connect the both side plates 10a and 10a via the boom bottom plate. 1. Weld the front end of the second bracket and attach the left and right first brackets.
The pin insertion portion 1a at the front end of the piston rod is rotatably held between the brackets 3, 3, and the derrick cylinder 6 is held between the left and right second brackets 4, 4.
A self-propelled crane characterized by comprising a boom-side connecting fitting having a gap into which the front end of the cylinder fits.