Abstract: The purpose of the present invention is to provide an easy-to-use and efficient method for cutting a concrete member, in particular, a method that is for cutting a reinforced concrete member, that makes it easy to increase cutting depth and cutting width, and that is low in cutting cost. To achieve the purpose, the present invention provides a method for cutting a concrete member through irradiation of the concrete member with laser, the method being characterized in that: the concrete member includes a steel material; concrete is melted by scanning laser thereon to form a cutting region; the steel material is heated by means of laser to a temperature that causes progression of self-burning of the steel material; and the melting of the concrete is expedited by heat generation from said self-burning.

Abstract: A direct bonding method of metal and resin comprises a first step where the metal material is subjected to electrolytic treatment by using a carboxylic acid to form a new surface, which is then coated with the carboxylic acid to obtain a carboxylic acid-coated metal material; a second step where the resin material and the carboxylic acid-coated metal material are laminated to form an interface to be bonded; a third step where the interface is heated to Tg of the resin material or higher by heating means to remove water from the interface, the decomposition of the resin material generates a carboxyl group, and the new surface is exposed on the surface of the carboxylic acid-coated metal material by removal of the carboxylic acid; and a fourth step where the interface is cooled below the Tg to form a bonded part by bonding the carboxyl group and the new surface.

Abstract: A direct bonding method of metal and resin comprises a first step where the metal material is subjected to electrolytic treatment by using a carboxylic acid to form a new surface, which is then coated with the carboxylic acid to obtain a carboxylic acid-coated metal material; a second step where the resin material and the carboxylic acid-coated metal material are laminated to form an interface to be bonded; a third step where the interface is heated to Tg of the resin material or higher by heating means to remove water from the interface, the decomposition of the resin material generates a carboxyl group, and the new surface is exposed on the surface of the carboxylic acid-coated metal material by removal of the carboxylic acid; and a fourth step where the interface is cooled below the Tg to form a bonded part by bonding the carboxyl group and the new surface.

Abstract: Provided is a mounting structure for a boot for a constant velocity universal joint, which is capable of ensuring a stable sealing performance at low cost. The resin boot (1) for the constant velocity universal joint includes a smaller-diameter end portion (2) and a larger-diameter end portion (3), each of which has a cylindrical shape. The smaller-diameter end portion (2) of the boot (1) is fixed to a shaft (17) constituting an inner member, and the larger-diameter end portion (3) is fixed to an outer joint member (11) serving as an outer member. An inner peripheral surface of the smaller-diameter end portion (2) of the boot (1) is integrally bonded to an outer peripheral surface of a boot-mounting portion (18) of the shaft (17) in an abutting state due to a physical interaction between a resin constituting the boot (1) and a metal constituting the shaft (17).