In an automatic transaction machine such as an automated teller machine, generally configuration is made, as shown in FIG. 5A and FIG. 5B, such that a rear door 102 is unlocked and opened, and an opening-and-closing cover 101 provided for example to an operation panel is opened by removing screws from the rear so as to enable maintenance such as of internal units.
A cover opening-and-closing support mechanism is provided at an automatic transaction machine such as an automated teller machine in order to facilitate opening of the heavy opening-and-closing cover 101 when performing maintenance. A gas spring 91 shown in FIG. 5B assists raising of the opening-and-closing cover 101. A gas spring stopper 92, described later, also locks the gas spring 91 such that the opening-and-closing cover 101 cannot be closed.
In order to close the opening-and-closing cover 101 after maintenance has been completed the cover opening-and-closing support mechanism is configured so as to close slowly when the gas spring stopper 92 is pressed and released.
A cover opening-and-closing support mechanism of such a related automatic transaction device 100 is configured, as shown in FIG. 4, with a gas spring 91 and a gas spring stopper 92.
The gas spring 91 is configured with a cylinder section 91c and a rod section 91d. A gas spring pivot point 91a is provided to the gas spring 91 at the top end of the cylinder section 91c, this being on the side of the opening-and-closing cover 101. A gas spring pivot point 91b is provided at the bottom end of the rod section 91d, this being on the side which is fixed to the cabinet of the automatic transaction device 100.
The gas spring stopper 92 is configured from a stopper portion 92a, a limiter portion 92b, and a spring 93. The stopper portion 92a locks the gas spring 91. The limiter portion 92b is provided so that the stopper portion 92a does not contact the rod section 91d of the gas spring 91 and damage the rod section 91d. The spring 93 is a biasing member for biasing the gas spring stopper 92 towards the gas spring 91 as indicated by arrow A, so as to cause the stopper portion 92a to contact the gas spring 91 as shown in the intermittent lined Region a.
Such a gas spring is attached to the opening-and-closing cover in order for example to push against the weight of the opening-and-closing cover during opening and closing. However, the reaction force from the gas pressure decreases as the gas spring 91 ages. The gas spring stopper 92 is therefore provided to prevent the opening-and-closing cover 101 from sagging. A stopper profile is provided at the gas spring stopper 92 that utilizes the difference between the external profiles of the cylinder section 91c and the rod section 91d of the gas spring 91.
Examples of biasing members include a tension coil spring, as shown in FIG. 4, a compression coil spring that similarly presses the gas spring stopper 92 in the arrow A direction, and torsion springs that are for example attached to the gas spring pivot point 91a and bias in the arrow A direction (see for example Japanese Patent Application Laid-Open (JP-A) No. 10-115340).