Abstract: The present invention is equipped with a shaft 11; a bolt 10 having a head 12 with a diameter larger than that of the shaft at a first-side end of the shaft; a first sleeve 20 having a cylindrical shape through which the shaft is inserted, a first-side end of which abuts on the head and the other-side end of which enters a fastening hole 103; a washer 30 having a tubular shape through which the shaft is inserted, arranged adjacent to the first sleeve on the other-end side of the first sleeve so as to be in contact with a member to be fastened 101, a first-side end thereon entering the fastening hole; and a nut 40 that is placed adjacent to the washer and screwed into the bolt; wherein tapered surfaces 310 and 32a, which are tapered toward the other-side end of the first sleeve, are formed on the washer in contact with the member to be fastened and on the first-side end thereof, respectively; a tapered surface 21 whose diameter increases toward the first-side end of the washer is formed at the other-side end o

Abstract: A blind nut including an internal threaded portion, a hollow tubular portion adjacent to the internal threaded portion, and a flange with hole, formed at the end on the opposite side to the internally threaded portion. The internal threaded portion is inserted into an attaching hole of the attached-to member, a part of the tubular portion is plastically deformed to expand in diameter, and the attached-to member is held between the deformed expanded diameter portion and the flange. The internal threaded portion includes a first straight portion adjacent to the tubular portion, a first tapered portion with an outside diameter gradually decreasing from the first straight portion, a second straight portion with an outside diameter smaller than the first straight portion, a second tapered portion with an outside diameter decreasing from the first straight portion, and a third straight portion with an outside diameter smaller than the second straight portion.

Abstract: A blind rivet including a sleeve and a flange on one end of the sleeve, and a mandrel including a shaft and a head, the head having a cutting edge for cutting open the sleeve. The sleeve of the rivet body has a thick portion, and a thin which has an inner diameter larger than the thick portion. The shaft of the mandrel has a large diameter portion, a middle diameter portion, a small diameter portion having an outer diameter smaller than the middle diameter portion, and a securing and attaching groove which is between the middle diameter portion and the small diameter portion. When the blind rivet is fastened, the middle diameter portion of the mandrel causes the material of the thick portion to undergo metal flow and to flow into the securing and attaching groove, enabling the mandrel to be tightly secured to the rivet body.

Abstract: A blind rivet having sealing and water-tightness features. The blind rivet is fastenable to a member having an opening and includes a rivet body and mandrel. The rivet body has a flange having a large diameter, a taper portion which is adjacent the flange and a sleeve which extends along the axial direction from the taper portion. A hole having a bottom is formed from the surface of the flange to the bottom of the sleeve. The mandrel has a head. The head of the mandrel is disposed at the bottom portion of the hole. A thick portion is formed at a portion of the sleeve, and thus the head is irremovably held in the hole. The mandrel is pulled, the sleeve is enlarged, and a substrate is sealed between the enlarged portion and the flange. A sealing structure using the blind rivet is also provided.

Abstract: A Blind nut may be mounted on a hole of a mounted member. The blind nut includes a main body with a plastically deformable material and a nut member with a relatively harder material. The main body has a cylindrical first tubular portion and a second hexagonal and cylindrical tubular portion provided adjacent to first tubular member. A flange is provided adjacent the second tubular member. Nut member includes a short cylindrical nut base member. Nut tubular members are adjacent nut base member and have a smaller outer diameter than that of the nut base member. A female threaded pass-through hole extends across the length of the nut member. The nut cylinder members are inside the first tubular member and the second tubular member; and the lower edge of the main body tubular member is in contact with a step member of the nut base member and welded thereto.

Abstract: A fastening structure includes a blind rivet and a nut. The blind rivet includes a rivet body having a hollow sleeve, a rivet head at the end of the sleeve and a through-hole; and a mandrel having an elongated stem and a mandrel head. The nut is positioned around the sleeve side end of the rivet body and the mandrel head and abuts one of the workpieces. The end portion of the sleeve is enlarged by the mandrel head and is embedded in the internal screw threads of the nut. The workpieces are thus fastened between the nut and the rivet head.

Abstract: A blind rivet including a sleeve and a flange on one end of the sleeve, and a mandrel including a shaft and a head, the head having a cutting edge for cutting open the sleeve. The sleeve of the rivet body has a thick portion, and a thin which has an inner diameter larger than the thick portion. The shaft of the mandrel has a large diameter portion, a middle diameter portion, a small diameter portion having an outer diameter smaller than the middle diameter portion, and a securing and attaching groove which is between the middle diameter portion and the small diameter portion. When the blind rivet is fastened, the middle diameter portion of the mandrel causes the material of the thick portion to undergo metal flow and to flow into the securing and attaching groove, enabling the mandrel to be tightly secured to the rivet body.

Abstract: The self-locking collar comprises a sleeve having a thick wall portion and a thin wall portion which has a thinner wall than the thick wall portion and a step portion between the thick wall portion and the thin wall portion; and a flange adjacent the thick wall portion of the sleeve. A through hole penetrates through the flange and the sleeve. The sleeve is inserted into a mounting hole of a resin component, the thin wall portion is collapsed to form a collapsed portion, and the resin component is sandwiched between the flange and the collapsed portion. The outer diameter of the thin wall portion is D, the wall thickness is t, the length is L, the Poisson ratio is ?, and: r = ( D - t ) / 2 ; m = L ? 4 ? r 2 ? t 2 12 ? ( 1 - ? 2 ) ; and 1.2 < m < 1.

Abstract: A blind nut including an internal threaded portion, a hollow tubular portion adjacent to the internal threaded portion, and a flange with hole, formed at the end on the opposite side to the internally threaded portion. The internal threaded portion is inserted into an attaching hole of the attached-to member, a part of the tubular portion is plastically deformed to expand in diameter, and the attached-to member is held between the deformed expanded diameter portion and the flange. The internal threaded portion includes a first straight portion adjacent to the tubular portion, a first tapered portion with an outside diameter gradually decreasing from the first straight portion, a second straight portion with an outside diameter smaller than the first straight portion, a second tapered portion with an outside diameter decreasing from the first straight portion, and a third straight portion with an outside diameter smaller than the second straight portion.

Abstract: A blind rivet having sealing and water-tightness features. The blind rivet is fastenable to a member having an opening and includes a rivet body and mandrel. The rivet body has a flange having a large diameter, a taper portion which is adjacent the flange and a sleeve which extends along the axial direction from the taper portion. A hole having a bottom is formed from the surface of the flange to the bottom of the sleeve. The mandrel has a head. The head of the mandrel is disposed at the bottom portion of the hole. A thick portion is formed at a portion of the sleeve, and thus the head is irremovably held in the hole. The mandrel is pulled, the sleeve is enlarged, and a substrate is sealed between the enlarged portion and the flange. A sealing structure using the blind rivet is also provided.

Abstract: A blind rivet is adapted for fastening two members, each member having a plurality of fastening holes arranged in corresponding positions. The inner diameter of the holes in the second member are greater than the inner diameter of the holes in the first member to compensate for positioning errors that may occur during machining. The blind rivet includes a rivet body having a sleeve, a rivet head, and a through hole; a mandrel having an elongated stem and a head; and a washer. The washer is arranged around the outer circumferential surface of the sleeve in the rivet body and adjacent to the rivet head. The members to be fastened are fastened between the enlarged end of the sleeve and the washer.

Abstract: A blind nut mountable in mounted members such as panels of a wide range of thicknesses. The blind nut includes an internal threading portion, a hollow tube-shaped portion adjacent to the threading portion, and an open flange formed in the tube-shaped portion on the end opposite the internal threading. The internal threading portion and the tube-shaped portion are inserted into a mounting hole in a mounted member, and a section of the tube-shaped portion is plastically deformed to enlarge the diameter in order to grip the mounted member between the deformed enlarged-diameter portion and the flange, and mount the blind nut in the mounted member. The tube-shaped portion has a tapered portion adjacent to the internal threading portion, and a cylindrical straight portion adjacent to the flange. The tapered portion and the straight portion are plastically deformed to widen their diameter and mount the blind nut on the mounted member.

Abstract: A blind rivet for fastening two members each member having a plurality of fastening holes arranged in corresponding positions. The inner diameter of the holes in the second member are greater than the inner diameter of the holes in the first member to compensate for positioning errors that may occur during machining. The blind rivet comprises a rivet body having a sleeve, a rivet head, and a through hole; a mandrel having an elongated stem and a head; and a washer. The washer is arranged around the outer circumferential surface of the sleeve in the rivet body and adjacent to the rivet head. The members to be fastened are fastened between the enlarged end of the sleeve and the washer.

Abstract: A method of welding a stud (11) is provided. In another aspect of the present invention, a welding system is provided for a weld stud (11). A further aspect of the present invention employs a weld stud (11) with a substantially conical end section (29).

Abstract: A welding gun 10 has a collet for holding a stud with a flange and a shank at the tip of the welding gun. The collet comprises a tubular first collet member 17, secured to the tip, which elastically opens to a larger diameter than the stud flange, for holding the flange at the tip, and a tubular second collet member 22, secured to the tip of a piston rod 21 which extends from an air cylinder 11 provided in the aft portion thereof toward the first collet member, for, by the movement of the piston, picking up, accommodating, and holding the shank of a stud fed with its flange to the fore inside the first collet member 17.

Abstract: A welding gun 10 has a collet for holding a stud with a flange and a shank at the tip of the welding gun. The collet comprises a tubular first collet member 17, secured to the tip, which elastically opens to a larger diameter than the stud flange, for holding the flange at the tip, and a tubular second collet member 22, secured to the tip of a piston rod 21 which extends from an air cylinder 11 provided in the aft portion thereof toward the first collet member, for, by the movement of the piston, picking up, accommodating, and holding the shank of a stud fed with its flange to the fore inside the first collet member 17.

Abstract: A method of welding a stud (11) is provided. In another aspect of the present invention, a welding system is provided for a weld stud (11). A further aspect of the present invention employs a weld stud (11) with a substantially conical end section (29).

Abstract: An aligning and supplying apparatus 1 comprises a container 2 to store screws, a chute which enters the container 2 and is formed on the top surface thereof with a groove 3 having a smaller width than the diameter of the screw head so as to receive the screw shank, means for relatively moving the container and the chute between a first position where the bottom surface of the container and the top surface of the chute meet and a second position where the top surface of the chute rises to a predetermined height above the bottom surface of the container, and a first air nozzle 14 which is positioned so as to face toward the top surface of the chute and blow off screws fallen without getting into the groove of the chute. The screw shank is thus received into the chute groove when the apparatus is in the first position and the screw 23 which lies on the top surface of the chute is blown off, leaving screws lined in a row in the groove 3 in the chute.