Abstract: A method for producing a resin sintered body 1 by applying an ink 3 to thermoplastic resin powder 2 and sintering the powder, the method including the step of immersing an intermediate resin sintered body 1m, which has an unevenly colored region on the surface thereof and the whole of which has been already sintered, in a surface treatment liquid containing sulfuric acid and chromic anhydride, in which the concentration of chromic anhydride is 300 g/L or more, for 5 minutes or longer. When producing a resin sintered body by sintering thermoplastic resin powder, the surface of the resin sintered body can be evenly and sufficiently colored to an extent required without an unevenly colored region on the surface thereof, and also the surface of the resin sintered body can have a good appearance and smoothness.

Abstract: A method of manufacturing a resin formed product having a leather grain includes: a 3D printing step of inputting printing data to a 3D printer, and printing an intermediate product having an intermediate grain that is a base of the leather grain; and a post processing step of obtaining the resin formed product, which is a finished product, by carrying out post processing on the intermediate product printed in the 3D printing step. A grain height in input data, which is the printing data inputted in the 3D printing step, is greater than or equal to 120% of a stacking pitch in the 3D printing step.

Abstract: A method for producing a resin sintered body 1 by applying an ink 3 to thermoplastic resin powder 2 and sintering the powder, the method including the step of immersing an intermediate resin sintered body 1m, which has an unevenly colored region on the surface thereof and the whole of which has been already sintered, in a surface treatment liquid containing sulfuric acid and chromic anhydride, in which the concentration of chromic anhydride is 300 g/L or more, for 5 minutes or longer. When producing a resin sintered body by sintering thermoplastic resin powder, the surface of the resin sintered body can be evenly and sufficiently colored to an extent required without an unevenly colored region on the surface thereof, and also the surface of the resin sintered body can have a good appearance and smoothness.

Abstract: A mounting device includes: a main plate on which a wheelchair is to be mounted; a vehicle side plate provided between one end of the main plate and a vehicle body; a ground side plate provided between another end of the main plate and a ground surface; and first to third rotating shafts provided between the vehicle body and the vehicle side plate, and between each of the plates. A slope is configured to include the main plate, the vehicle side plate, the ground side plate and the first to third rotating shafts. The slope is provided so that the main plate is displaced between a low position and a high position by rotating the first to third rotating shafts using a drive mechanism.

Abstract: A mounting device includes: a main plate on which a wheelchair is to be mounted; a vehicle side plate provided between one end of the main plate and a vehicle body; a ground side plate provided between another end of the main plate and a ground surface; and first to third rotating shafts provided between the vehicle body and the vehicle side plate, and between each of the plates. A slope is configured to include the main plate, the vehicle side plate, the ground side plate and the first to third rotating shafts. The slope is provided so that the main plate is displaced between a low position and a high position by rotating the first to third rotating shafts using a drive mechanism.