JPH0372959U

JPH0372959U -

Info

Publication number: JPH0372959U
Application number: JP13350689U
Authority: JP
Priority date: 1989-11-16
Filing date: 1989-11-16
Publication date: 1991-07-23

Description

[Brief explanation of drawings]

第１図ａはこの考案の好適実施例を示す旋回ロ
ツク装置におけるキヤブフロアプレートを示す斜
視図、同図ｂは上部旋回体の旋回フレームを示す
斜視図、同図ｃは固定側受部を設けた下部走行体
を示す斜視図、第２図は固定側受部にロツクピン
が係合した状態の横断面図、第３図ａはロツクピ
ンが旋回側孔部と固定側受部に挿入されたロツク
状態を示す周方向での縦断面図、同図ｂは同旋回
中心点に対する径方向での縦断面図、第４図はロ
ツク作用を説明する図、第５図は補助ガイド面を
設けた場合の固定側受部の異なる実施例でのロツ
ク作用を説明する図、第６図はロツクピンの支持
点を示す部分斜視図、第７図は従来例のロツクピ
ンが固定側受孔に嵌合した状態での断面図である
。１……旋回ロツク装置、２……下部走行体、４
……固定側受部、６……背板、７Ａ……ガイド面
、７Ｂ……補助ガイド面、９……ストツパ孔、１
１……上部旋回体、１４……旋回側孔部、１７…
…ロツクピン、０……旋回中心。 Fig. 1a is a perspective view showing a cab floor plate in a swing lock device showing a preferred embodiment of this invention, Fig. 1b is a perspective view showing a revolving frame of an upper revolving structure, and Fig. 1c is a perspective view showing a fixed side receiver. Fig. 2 is a cross-sectional view showing the lock pin engaged with the fixed side receiving part, and Fig. 3 a shows the lock pin inserted into the swing side hole and the fixed side receiving part. A vertical cross-sectional view in the circumferential direction showing the locked state, Figure b is a vertical cross-sectional view in the radial direction with respect to the center of rotation, Figure 4 is a diagram explaining the locking action, and Figure 5 is a diagram showing the provision of an auxiliary guide surface. Fig. 6 is a partial perspective view showing the support point of the lock pin, and Fig. 7 shows the lock pin of the conventional example fitted into the fixed side receiving hole. It is a sectional view in a state. 1... Swivel lock device, 2... Lower running body, 4
... Fixed side receiving part, 6 ... Back plate, 7A ... Guide surface, 7B ... Auxiliary guide surface, 9 ... Stopper hole, 1
1...Upper rotating body, 14...Swivel side hole, 17...
...Lock pin, 0...Turning center.

Claims

[Claims for Utility Model Registration] (1) A fixed side receiver is provided in a structure serving as a base, and a rotating body that rotates along the structure is provided with a swing side hole that aligns with the fixed side receiver. In a swing locking device for a rotating body, which is provided with a lock pin that is inserted into a swing side hole and a fixed side receiving part when they are aligned, the swing side hole is comprised of an elongated hole extending in the radial direction with respect to the swing center point. a stopper hole with which the fixed side receiving portion can be engaged by movement of the lock pin in a radial direction with respect to the pivoting center point; and a guide surface connected to an opening edge of the stopper hole and curved concentrically with the pivoting center point. A rotating lock device for a rotating body, characterized in that the lock pin is supported so as to be biased in the radial direction. (2) An auxiliary guide surface is provided at the extending end of the guide surface of the stationary side receiving part, which is concentric with the rotation center point and intersects with the rotation locus passing through the center of the stopper hole, gradually approaching and connecting to the guide surface. A rotating lock device for a rotating body according to claim 1, characterized in that: (3) The stationary side receiving part has a notch extending in the radial direction in the center of the base block to form a stopper hole,
3. A rotating lock device for a rotating body according to claim 1, wherein one of the stopper holes in the radial direction is closed by a back plate.