Abstract: When a projection nut is brought into an intended position, in order that welding may be completed with the nut kept at accurate posture and the nut fed in correct position, a recess (21) is formed at the leading end of a feed rod (20), the feed rod (20) is moved back in a direction almost orthogonal to the axial line of an electrode, and when the feed rod (20) is stopped, a guide pin (13) of an electrode (11) gets into a screw hole (26) of a projection nut (25), and then the feed rod (20) is restored to determine the position of the nut (25), then the other electrode (19) advances to complete the welding.

Abstract: A device for jointing feeding hose appropriate to such a case as jointing a feeding hose made of synthetic resin to a part-feeding metallic pipe, in which a guiding base plate (20) in the shape of a single plate is connected to a part-feeding pipe (5) and said guiding base plate (20) is provided with a cylindrical holding part (23) for receiving a feeding hose (12) as a mating member so that a fixing piece (25) of the feeding hose is fixed to the guiding base plate (20) in a position spaced from said cylindrical holding part (23).

Abstract: In an electrode for welding with a retractable guide pin so received in a guide hole of the electrode that air blows out from a gap between the guide hole and the guide pin as the guide pin is pushed in to prevent intervention of foreign matters between an end face of an electrode and a steel sheet part or at a sliding portion of the guide pin, a large-diameter hole (33) and a small-diameter hole (34) are provided at a portion through which passes a small-diameter portion (7) of the guide pin (6) so as to form a receiving face (35) with the difference in diameter between the two, and an exhaust passage is provided near the receiving face (35) to establish communication between the large-diameter hole (33) and outside of the electrode.

Abstract: A retractable feeding rod is located in a guide cylinder. A workpiece retaining pipe is connected to a leading end of the guide cylinder which serves as a movable electrode and a feed-in passage for a workpiece positioned at an acute angle to the guide cylinder. It opens within the guide cylinder and a control surface is provided for appropriately regulating the advancing speed of the workpiece in an end or in the middle of a passage through which the workpiece is fed to the guide cylinder to prevent the guide cylinder from being damaged or worn by the workpiece that impacts the guide cylinder at a high speed.

Abstract: An electrode for electric resistance welding comprises a guide hole of a circular cross-section composed of a small-diameter hole and a large-diameter hole, a guide pin composed of a small-diameter portion and a large-diameter portion, the small-diameter portion and larger-diameter portion of the guide pin being fitted into the small-diameter hole and large-diameter hole of the guide hole, respectively, so that when the guide pin is pushed down, compressed air is allowed to jet out of a gap between the small-diameter hole and the small-diameter portion. The large-diameter portion of the guide pin is firmly fitted into the guide hole, with an air passage formed in the outer circumference of the large-diameter portion and the end surface of the large-diameter portion seated on the inner end surface of the large-diameter hole.

Abstract: In a device for conveying parts delivered from a parts feeder by air ejection, a part detection sensor (22) is installed near an air nozzle (12) disposed in a send-out passage (5), and vibratory motion of the parts feeder is stopped while air is ejected from the air nozzle (12) in response to a part detection signal transmitted by the parts detection sensor (22), ensuring that an excessive number of parts are not accummulated for the conveying ability of the air ejection.

Abstract: This invention provides an arrangement wherein members, such as a guide tube, feed rod, air cylinders, and parts feeding control unit, which perform the parts feeding function, are supported with good balance to ensure that a part is inserted in a receiving hole in a mating part, for example a hole in a movable electrode, accurately and with high reliability.The basic arrangement comprises a guide tube 1 joined to the lower side 16 of a base plate 14, an air cylinder 29 attached to the upper side 19 of the base plate 14, and a stationary member 31 to which the air cylinder is firmly joined.

Abstract: This invention is intended to secure a fused area which is as large as possible in fixing a flanged bolt in position by projection welding. A welding method characterized by forming a flange 3 with a flat bulge 4 having a crest 5 and enlarging the melting starting at the crest 5 throughout the bulge while pressing the crest 5 against a mating member 7. And the flange and the mating member are strongly clamped between a fixed electrode 6 and a movable electrode 8. As for the shape of the bulge, it may be tapered, spherical or the like. Further, the diameter of the bulge 4 is set so that it is greater than the diameter of the bolt stem 2.

Abstract: A parts supply apparatus adapted to supply a part, such as a bolt (3) or a nut (41), which is engaged with a free end of a supply rod (4) capable of being turned and axially moved, to an object place. A retainer member (11) for retaining a part, such as a bolt or a nut temporarily is moved between a part receiving position and a part delivering position in which a part is positioned coaxially with the supply rod (4), or between a part transfer position and a retreating position, and a part is delivered to the supply rod (4) in the part delivering position. A detecting device (23) for ascertaining that a part is held normally on the retainer member (11) is provided.

Abstract: In order to correctly detect whether an individually supplied part is actually mounted on a part-receptive member, a part detector is disposed at a position close to a part-holding member of a part-supply rod. Positionwise relationship between this part detector and the part-receptive member is predetermined in order that the part mounted on the part-receptive member can activate operation of the above-identified part detector to generate a signal for identifying presence of the delivered part while the part-supply rod retreats.

Abstract: A part-supply apparatus provisionally holds each part delivered from a parts-passage in a temporary holding chamber having an outlet aperture before delivering the released parts to a predetermined point from the outlet aperture by means of forward movement of a supply rod capable of moving itself back and forth; wherein, in order to prevent the second parts from coming into abnormal engagement with the preceding parts at the predetermined position in the tempoary holding chamber otherwise resulting in the inability to execute normal supply of parts, a constraining device for constraining transfer of the following parts is provided in the parts-passage immediately before the outlet aperture.

Abstract: A chucking-type parts-feeding apparatus comprises a device for chucking an individual part, which is disposed adjacent an end of a parts-feeding passageway, and a device connected with the chucking device for shifting the individual part held in the chucking device towards a predetermined location apart from the parts-feeding passageway. The apparatus further comprises either a device connected with the chucking device for shifting the individual part held in the chucking device in the direction in which the part comes out of the parts-feeding passageway or an opening formed in the parts-feeding passageway for allowing the part to pass through the opening as the chucking device is moved towards the predetermined location.

Abstract: A part is kept on standby so that it can be reliably held by a feed rod. An auxiliary feed rod is provided with an arrangement for holding a part at a fixed position in advance. The part is stopped on the advance and retraction axis of a main feed rod by the advance movement of the auxiliary feed rod where the part transferred and is held on the main feed rod.

Abstract: By advancing a rotatable feed rod (5) with a threaded part (1) such as a bolt or a nut inserted into a socket hole (6) at a front end thereof, the threaded part (1) is supplied and tightened to an object such as a threaded hole or a bolt. In order to prevent the part (1) from dropping off or dislocating on its way of feeding the part (1) is advanced to the vicinity of the object with the part being restrained by, for example, a closure member (31), and then the part (1) is inserted into the socket hole (6) of the feed rod (5). Finally, the feed rod (5) is further advanced until the part (1) arrives at the object and is tightened thereto.

Abstract: The present invention is directed to a method and apparatus for feeding and tightening threaded parts, such as bolts or nuts. The apparatus incorporates a holding member longitudinally movable while holding a threaded part at the front end thereof, and a rotary feed rod having an engaging head at the front end thereof adapted to engage the threaded part. A retractable detecting member is used to detect the presence of a threaded part in the holding member. The rotary feed rod is longitudinally movable wherein, first, the holding member holds the threaded part at or adjacent the end of a part feeding passage and is then longitudinally moved to a position where the threaded part is coaxial with the feed rod. The engaging head of the feed rod is then advanced, and substantially at the same time as the engaging head engages the threaded part the holding member is moved backward to allow the feed rod to be advanced. Thus, the threaded part is fed to a mating part, such as a threaded hole or a bolt, and tightened.

Abstract: It is an object to provide an arrangement wherein a parts feeding member and a parts receiving member are provided each with a magnet, characterized in that the front end of a part is prevented from being magnetized to preclude magnetic repulsion problems in the feeding and receiving of parts.The polarity of the magnet associated with the feeding member is selected to control the magnetic lines so that they pass through only a portion of the part.

Abstract: A welding method and apparatus in which a hollow positioning guide pin (7) is installed upon an electrode (8) to project through an aperture in a plate (1), whereupon a flanged elongate or slender part (4) is inserted in the guide pin, and as another electrode (15) presses the flange, the guide pin is withdrawn from the aperture.

Abstract: In order to feed parts at high reliability without malfunction, by accurately positioning the parts on the axial line of a feed rod, when feeding parts by means of a retractable feed rod, a feed member making retractable, circular and parallel motions is disposed at the end portion of a parts feed pipe, and the feed member is provided with an element for holding the parts at a specific position, while the feed rod is provided with a device for holding the parts.

Abstract: In a device for conveying parts delivered from a parts feeder by air ejection, a part detection sensor (22) is installed near an air nozzle (12) disposed in a send-out passage (5), and vibratory motion of the parts feeder is stopped while air is ejected from the air nozzle (12) in response to a part detection signal transmitted by the parts detection sensor (22), ensuring that an excessive number of parts are not accumulated for the conveying ability of the air ejection.

Abstract: A part is kept on standby so that it can be reliably held by a feed rod. An auxiliary feed rod is provided with an arrangement for holding a part at a fixed position in advance. The part is stopped on the advance and retraction axis of a main feed rod by the advance movement of the auxiliary feed rod where the part transferred and is held on the main feed rod.