3 The floorboard of the bed has a structure that can be securely  attached without becoming detached easily when used.  4 In the case of a bed whose front frame can be opened or slid  down, the bed has a structure whereby the baby or infant  cannot easily open or slide down the front frame.  5 In the case of a rollaway bed, the casters have employed a  measure to prevent them from rolling unintendedly.  6 Any accessories of the bed are attached so that they do not  cause any abnormality when being pulled with a force of 147.1  newtons.  7 The bed has a structure whereby the baby or infant cannot  easily climb over its frame and fall out.  8 The bed has a structure whereby the head of the baby or  infant cannot get caught easily between the frame bars or  between the frame and the mattress.  9 The bed has a structure whereby the hand or foot of the baby  or infant cannot get caught easily between its parts.  10 The bed has a structure whereby a finger of the baby or  infant cannot get caught easily between its parts.  11 The bed has a structure whereby a thread or the like of the  baby's or infant's clothing cannot get hooked easily.  12 When a sandbag weighing 10 kilograms is dropped onto the  central part of the floorboard of the bed continuously for 250  times from a height of 20 centimeters, no abnormality occurs on  any part of the bed.  13 When a load of 294.2 newtons is applied to the central part of  the top bar of the front frame, the rear frame, and the side  frames, no abnormality occurs on any part of the bed.  14 When the central part of a frame bar is pulled with a force of  147.1 newtons, no abnormality occurs, such as the bar coming  off the bed.  15 When the central part of the top bar of the front frame, the  rear frame, and the side frames is pulled with a force of 196.1  newtons, no abnormality occurs on any part of the bed.  16 When a load of 588.4 newtons is applied to the central part of  the front edge of the floorboard of the bed continuously for ten  minutes, no abnormality occurs on any part of the bed.  17 In the case of a bed whose frames are netted or boarded,  when a force of 196.1 newtons is applied to the central part of  the net or board, no abnormality occurs, such as breakage of the  net or board.  18 When a load of 294.2 newtons is applied to the outside  surface of the central part of the top bar of each side frame in  turns for 30 times, the displacement of the central part of the  top bar of the side frame is no more than 30 millimeters, and no  abnormality occurs on any part of the bed.  19 When a shock is applied to the inside surface of the central  part of the top bar of each of the front frame, rear frame, and  side frames with a sandbag of 10 kilograms, no abnormality  occurs on any part of the bed.  32 