A safety mat includes: a pressure-sensitive switch mat, a surface of which is made of a flexible sheet; a step board disposed on the pressure-sensitive switch mat; and a plurality of load transferring members arranged at intervals between the pressure-sensitive switch mat and the step board. A load acting on the step board is detected by the pressure-sensitive switch mat via the plurality of load transferring members.

A control method for a mold opening/closing device including a hydraulic cylinder that opens and closes a mold, a hydraulic drive device that drives the hydraulic cylinder by supplying a hydraulic oil, and a controller that controls the hydraulic drive device, wherein the controller changes speed change in a deceleration region, in which movement of the hydraulic cylinder is decelerated, between a first half portion and a second half portion of the deceleration region, and causes speed change rate per unit time in the second half portion to be smaller than in the first half portion.