JPH0395135U

JPH0395135U -

Info

Publication number: JPH0395135U
Application number: JP440790U
Authority: JP
Priority date: 1990-01-22
Filing date: 1990-01-22
Publication date: 1991-09-27

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係る装置が適用さ
れたプレス機械の側面図、第２図は第１図で示さ
れた駆動ユニツト等で示す断面図、第３図、第４
図、第５図は第１図で使用されている過負荷安全
装置をその作用順序に従つて示した断面図、第６
図は過負荷が圧縮荷重として作用する場合に適用
される実施例の装置を示す断面図、第７図は過負
荷が引つ張り荷重と圧縮荷重の両方として作用す
る場合に適用される実施例の装置を示す断面図で
ある。１……トランスフアプレス機械、２……スライ
ド、４……ボルスタ、１６，６６……過負荷安全
装置であるシリンダ装置、４４……ワーク搬送装
置、４５……駆動力伝達機構、４６，７６……シ
リンダ、４７，７７……ピストンロツド、４９，
７９……ピストン、５０，８０……第１室、５１
，８１……第２室、５３，８３……連通路、５３
Ａ，８３Ａ……開口部、５４，８４……弾性部材
であるばね、５５，８５……バルブ、５６，８６
……油逃がし通路。 Fig. 1 is a side view of a press machine to which a device according to an embodiment of the present invention is applied, Fig. 2 is a sectional view showing the drive unit etc. shown in Fig. 1, Figs.
Figure 5 is a sectional view showing the overload safety device used in Figure 1 in the order of its operation;
The figure is a sectional view showing an embodiment of the device applied when overload acts as a compressive load, and Figure 7 is an embodiment applied when overload acts as both a tensile load and a compressive load. FIG. DESCRIPTION OF SYMBOLS 1... Transfer press machine, 2... Slide, 4... Bolster, 16, 66... Cylinder device which is an overload safety device, 44... Workpiece transfer device, 45... Driving force transmission mechanism, 46, 76 ... Cylinder, 47, 77 ... Piston rod, 49,
79... Piston, 50, 80... First chamber, 51
, 81...Second chamber, 53,83...Communication passage, 53
A, 83A... Opening, 54, 84... Spring which is an elastic member, 55, 85... Valve, 56, 86
...Oil escape passage.

Claims

[Scope of utility model registration request]

A cylinder and a piston rod that can extend and contract with respect to the cylinder are provided in a driving force transmission mechanism that transmits driving force to a conveying device for conveying a press work, and the inside of the cylinder is covered with a piston of the piston rod. The first chamber is divided into a chamber and a second chamber, and the first chamber is filled with oil, and a communication passage is provided in the piston to communicate the first chamber and the second chamber, and the cylinder is elastically biased by an elastic member. An overload safety device for a press work transfer device, comprising: a valve that closes an opening on the second chamber side of the communication passage; and an oil relief passage connected to the second chamber.