Abstract: Provided is a lane rope float that is less likely to cause injuries even when a hand, a foot, or the like of a swimmer collides with the lane rope float. A lane rope float that is attached to a rope via a cylindrical portion to define lanes of a pool and is made of a synthetic resin material, the lane rope float including: a plurality of blades protruding in parallel with the rope around the cylindrical portion; and an outer peripheral wall connected to side end portions of the blades and covering the blades, wherein a groove portion is formed between the side end portion of each of the blades and the outer peripheral wall, wherein a connection end portion of the side end portion of the blade and the outer peripheral wall are connected, and wherein the outer peripheral wall is elastically deformable toward the blades so as to crush the groove portion.

Abstract: A lane rope float having higher wave absorbing performance than before is provided. A lane rope float is one that is attached to a rope R via a tubular portion and divides lanes of a pool, and the lane rope float is characterized by: including a plurality of blades that protrude from a side surface of the tubular portion in parallel with the rope R, and a wall surface portion that is coupled to side end portions of the blades to cover the blades, in which in an outer end portion of the lane rope float from the center of the tubular portion to the wall surface portion, at least ½ of the range from the center of the tubular portion to the wall surface portion is formed along a vertical plane V2 perpendicular to the tubular portion.

Abstract: A sound-absorbing panel to be used affixed to a jet engine of an aircraft, provided with: a resin core layer having a first surface, a second surface disposed on the side opposite from the first surface, and multiple partitions extending between the first surface and second surface so as to partition multiple cells; a resin first skin layer laminated on the first surface of the core layer; and a resin second skin layer laminated on the second surface of the core layer. The first skin layer is disposed so as to face the external space while in use, and has multiple through-holes for providing communication between internal spaces of the multiple cells and external space faced by the first skin layer. The core layer has openings for providing communication between the internal spaces of the multiple cells and external space of the core layer.

Abstract: Metal plates are placed on opposed surfaces of two heating plates, the metal plates are heated. Then, a hollow plate is placed between the two heating plates, and the two heating plates are moved toward each other. The metal plates, which are heated to a high temperature, are bonded to the outer surfaces of the hollow plate by thermal fusion caused by the heat of the metal plates. After the metal plates are brought into planar contact with the hollow plate, the heating plates are moved away from each other. The heating plates sandwich the hollow plate only for a very short time. Thus, the heat of the heating plates is not transferred excessively to the hollow plate.

Abstract: Metal plates are placed on opposed surfaces of two heating plates, the metal plates are heated. Then, a hollow plate is placed between the two heating plates, and the two heating plates are moved toward each other. The metal plates, which are heated to a high temperature, are bonded to the outer surfaces of the hollow plate by thermal fusion caused by the heat of the metal plates. After the metal plates are brought into planar contact with the hollow plate, the heating plates are moved away from each other. The heating plates sandwich the hollow plate only for a very short time. Thus, the heat of the heating plates is not transferred excessively to the hollow plate.

Abstract: A structure 1 is provided with a core layer 2 where a plurality of polygonal-cylindrical or circular-cylindrical cells S are disposed adjoiningly inside and skin layers 3, 4 that are provided on the upper and lower surfaces of the core layer 2. Communication portions 6 for communicating with adjacent cells S are formed in the core layer 2. A molded article is formed by providing a bent portion to the structure 1.

Abstract: A structure 1 is provided with a core layer 2 where a plurality of polygonal-cylindrical or circular-cylindrical cells S are disposed adjoiningly inside and skin layers 3, 4 that are provided on the upper and lower surfaces of the core layer 2. Communication portions 6 for communicating with adjacent cells S are formed in the core layer 2. A molded article is formed by providing a bent portion to the structure 1.

Abstract: A structure 1 is provided with a core layer 2 where a plurality of polygonal-cylindrical or circular-cylindrical cells S are disposed adjoiningly inside and skin layers 3, 4 that are provided on the upper and lower surfaces of the core layer 2. Communication portions 6 for communicating with adjacent cells S are formed in the core layer 2. A molded article is formed by providing a bent portion to the structure 1.

Abstract: A folding box made of synthetic resin which a worker can surely grip and stably carry without a slip by gripping whichever edge parts of a hexahedron of a box with both hands is provided. The folding box includes a rectangular-tube shaped side wall configuration member 3 comprised of four side panels 1 made of hard synthetic resin, adjacent side ends of the four side panels 1 being foldably connected to each other through side panel connecting hinge parts 2, a bottom plate configuration member 6 comprised of connecting bottom pieces 4 made of hard synthetic resin which are foldably connected to bottom ends of the plurality of side panels 1 through bottom piece connecting hinge parts 5, and a lid configuration member 7 comprised of lid pieces 15 made of hard synthetic resin which are foldably connected to upper ends of the plurality of side panels 1 through lid piece connecting hinge parts 10.

Abstract: A folding box made of synthetic resin which a worker can surely grip and stably carry without a slip by gripping whichever edge parts of a hexahedron of a box with both hands is provided. The folding box includes a rectangular-tube shaped side wall configuration member 3 comprised of four side panels 1 made of hard synthetic resin, adjacent side ends of the four side panels 1 being foldably connected to each other through side panel connecting hinge parts 2, a bottom plate configuration member 6 comprised of connecting bottom pieces 4 made of hard synthetic resin which are foldably connected to bottom ends of the plurality of side panels 1 through bottom piece connecting hinge parts 5, and a lid configuration member 7 comprised of lid pieces 15 made of hard synthetic resin which are foldably connected to upper ends of the plurality of side panels 1 through lid piece connecting hinge parts 10.