EP0768927A1 - Nietenzuführung - Google Patents

Nietenzuführung

Info

Publication number
EP0768927A1
EP0768927A1 EP95925818A EP95925818A EP0768927A1 EP 0768927 A1 EP0768927 A1 EP 0768927A1 EP 95925818 A EP95925818 A EP 95925818A EP 95925818 A EP95925818 A EP 95925818A EP 0768927 A1 EP0768927 A1 EP 0768927A1
Authority
EP
European Patent Office
Prior art keywords
rivet
holding device
plunger
driving
swivel arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP95925818A
Other languages
German (de)
English (en)
French (fr)
Inventor
Michael Feldpausch
Stuart Edmund Blacket
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0768927A1 publication Critical patent/EP0768927A1/de
Ceased legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00Riveting
    • B21J15/10Riveting machines
    • B21J15/30Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
    • B21J15/32Devices for inserting or holding rivets in position with or without feeding arrangements

Definitions

  • the invention relates to a device for providing fastening elements having a shaft and head, for example rivets or the like, the shaft length being in particular equal to or smaller than the head diameter, in front of a plunger of a driving-in machine which is adapted to the head and has a transfer mechanism which in each case has a Fastening element transported by means of a medium flow in an intermediate position in the vicinity of the plunger.
  • Document US-A-1,730,750 describes a fastener driving machine, in front of which tappets two parallel upward rails open.
  • the heads of the fastening elements can ride on the rails and their shafts hang in the space between the two rails.
  • a holding device is attached to the driving machine in such a way that the head of the foremost fastening elements, which are brought up on the rails, is under the axially aligned position on the plunger by two fingers which are spaced apart by the diameter of the shaft and laterally elastic is.
  • the fastening elements are supplied by gravity, which leads to considerable inaccuracy in the axial alignment of the fastening element held in front of the tappet.
  • DE-A-36 31 657 describes a device according to the preamble of claim 1 for setting fastening elements, in which rivets are conveyed individually by means of compressed air through a pipe into an intermediate position near the ram. From this intermediate position, each rivet transported is moved into the driving-in path by means of a slide which can be moved transversely to the driving-in direction
  • the disadvantage here is that the axial alignment, especially of top-heavy fastening elements, whose shaft length is equal to or less than their head diameter, is not guaranteed. So that the fastening element can be aligned at all on the tappet, a certain shaft length is required so that the fastening element is securely gripped in the intermediate position relative to the shaft.
  • Another disadvantage is that the approach of the fastening element in the intermediate position of the hold-down device of the driving tool must be kept relatively wide transversely to the driving direction, which makes driving fasteners into three-dimensionally strongly shaped workpieces considerably more difficult.
  • the invention is therefore based on the object of providing measures in the device mentioned at the outset which ensure an exact axial alignment for each fastening element provided in front of the tappet, in particular the aforementioned top-heavy fastening elements.
  • a radially flexible holding device which can move with the plunger is formed in the driving machine and which can hold the head in axial alignment directly in front of the plunger, and that
  • the transfer mechanism is equipped with means which allow a transported fastening element to get into the holding device. This ensures the alignment of the fastening element by the holding device, which, due to its movement with the plunger, maintains the orientation of the fastening element until shortly before it is driven into the workpiece.
  • the transfer mechanism is therefore not subject to increased accuracy requirements, so that it can be implemented in such a way that it does not hinder the driving-in process for particularly curved sheet metal parts and in particular can also transport rivets with a very short shank.
  • the means can be a fastening element transported into the intermediate position from below, ie. H. insert into the holding device against the driving direction. If the means have, for example, a swivel arm on which the fastener transported is in its intermediate position, the arm pivoted into the drive-in path only has to perform a small axial stroke for inserting the fastener into the holding device.
  • a fastening element is temporarily held in an intermediate position in front of the tappet and then transferred into the holding device in the course of the driving-in process.
  • a ball ring is recommended as a holding device, the balls of which are held radially elastically in a mouthpiece of the driving tool surrounding the plunger, which moves in the driving direction with the plunger during the driving process.
  • FIG. 1 shows a side view of a partially sectioned device equipped with the features of the invention
  • FIG. 2 shows a side view of the partially cut capture station from the transfer mechanism of the device according to FIG. 1;
  • FIG. 3 shows a view of the catching station along the line III-III from FIG. 2;
  • FIG. 4 shows a sectional view of the catching station along the line IV-IV from FIG. 3;
  • Fig. 5 is a schematic representation of a detail for the device of Fig. 1;
  • Fig. 6-10 further embodiments of the capture station
  • FIG. 14 shows a schematic illustration of a rivet driving-in machine which is further with the features of the invention.
  • FIG. 15 shows an enlarged axial section of the hold-down device from the driving-in machine according to FIG. 14;
  • ORIGINAL DOCUMENTS 16 shows the view of a cross section through the hold-down device according to FIG. 15 along the line III-III;
  • 18-21 are schematic representations of further embodiments of the transfer mechanism.
  • the invention is described below with reference to a driving tool, designated as a whole by 10, with which two workpieces, not shown, can be connected by riveting.
  • the associated rivets are denoted by 1, 2, 3, 4, 5, 6 in FIGS. 1 to 3, the length of the shank 8 of a rivet being smaller than the diameter of its head 7.
  • the driving tool 10 has a fixed head 12, from which a transition part 14 can be moved down a distance D and brought back again.
  • the transition part 14 has a retainer 16, which houses an elongated plunger or hammer 18 in its axial center.
  • the lower dead center position of the extended hold-down device 16 is indicated by dashed lines in FIG. 1 at 16a.
  • a so-called C-frame 13 is fastened to the main 12 of the driving-in device 10, which extends from the main 12 in a large arc to below the bottom dead center position of the hold-down device and there with a pointing towards the hold-down device and aligned on its axis 17 Teten mold carrier 15 is provided.
  • the transfer mechanism designated as a whole by 20 and not shown, is attached to the main 12, for example, in a manner not shown. It consists of a solid block 22 which has a through hole 24 parallel to the axis 17. In this bore a two-part shaft 26, 28 can be rotated by a predetermined angle. A lever 27, which extends transversely to the shaft axis, is wedged onto the section of the upper shaft part 26 projecting upward from the bore 24 and axially immovable in the bore 24, said lever 27 extending in a manner not shown with the piston of a fixed piston cylinder ⁇ the unit is movably connected.
  • the tapered lower section of the shaft part 26 penetrates into a drilled-out section of the lower shaft part 28, the jacket of which has an axially extending longitudinal slot 25 of a length at least equal to d.
  • a pin 23, which is fixedly connected to the shaft part 26, is captured in the longitudinal slot 25.
  • a swivel arm 30 is anchored in a rotationally fixed manner and extends transversely to the axis 29 of the shaft 26, 28.
  • the swivel arm 30 carries a receptacle 40 for one rivet 5 each, which essentially has two opposite grips which can be pivoted to a limited extent about a joint 42.
  • ORIGINAL DOCUMENTS fer 44, 46 has.
  • the grippers are held together by an O-ring 45, which is caught in the grooves of the grippers 44, 46 above the joint 42.
  • the grippers define a receiving trough for the shaft 8 of a rivet 5, the head 7 of the rivet 5 remaining above the grippers 44, 46.
  • the pivot arm 30 is the corresponding actuation of the piston cylinder acting on the lever 27.
  • the section of the shaft part 28 that is not drilled out within the bore 24 has a recess in the circumferential direction into which a pin 52 of a two-armed lever 50 articulated at 54 on the block 22 engages radially.
  • the piston of a piston-cylinder unit 56 fastened to the block 22 is articulated on the opposite end of the lever 50 projecting outward from block 22.
  • the lever 50 extends through such a wide opening 21 in the block 22 that when the piston-cylinder unit 56 is actuated, the lever 50 can pivot about the pivot pin 54 essentially in a vertical plane and thereby the shaft part 28 in the direction the axis 29 takes.
  • a plastic hose 72 which starts from the output end of a vibration feeder, not shown, opens into a catching station 70.
  • German Patent 42 39 683 which consists of a heap of disordered rivets and a number of identically oriented rivets
  • the cross section of the hose 72 is adapted to the shape of the rivet (cf. rivet 1, FIG. 2), so that the rivets can be conveyed through the hose 72 under compressed air drive, but do not lose their orientation along the conveying path, ie in the hose 72 can neither tilt nor tumble.
  • the hose 72 therefore has a rectangular cross section and is only insignificantly wider on the inside than the diameter of the rivet head 7 and only insignificantly higher than the rivet length.
  • the end of the tube 72 is seated in a receiving block 74, in which two opposite receiving strips 76, 78 are embedded just below the head 7 of the incoming rivet. Since the clear width between the receiving strips 76, 78 is larger than the diameter of the shaft 8 but smaller than the diameter of the head 7, the rivets, hanging on the receiving strips 76, 78, come in three angles of 90 ° to one another offset pliers 82, 84, 86 arranged at the same height, each of which is articulated to an upper pivot pin 81, 83, 85 and all pliers are caught in a groove by one below the pivot pin 81, 83, 85 and the Pliers surrounding O-ring 88 are held together.
  • the pliers 82, 84, 86 can therefore be pivoted outwards against the action of the O-ring 88.
  • the pliers 82, 84, 86 each hold a rivet below his head until it is driven down out of the clasp of the pliers 82, 84, 86 by a slide 90 coupled to a drive.
  • the slide 90 is vertically displaceable along a vertical axis 92 by the drive 94 mentioned, the central axis of the receptacle 40 being in alignment with the axis 92 in the receiving position of the swivel arm 30 (FIG. 2).
  • the slider 90 moves downward by pressure on the head 7 of a rivet, the slider 90 pushes the rivet 2 out of the clasping by the pliers 82, 84, 86
  • the hold-down device 16 has a mouthpiece 58 in which a holding device 60 for one rivet is arranged.
  • the holding device 60 consists of a ring of balls 62, 64 which are held in a round cage by an O-ring 65 surrounding all balls.
  • Each ball emerges radially inwards from the cage with a front ball cap, but can, for example, deflect against the action of the O-ring 65 radially by interposing a rivet head and allow the rivet head to pass through and then rest against the rivet shaft.
  • the plunger 18 can pass between the balls 62, 64 when a rivet 6 is shot out.
  • FIG. 5 schematically shows a top view of an outlet 71 of a vibratory feeder, on which a number of identically oriented rivets 61, 63, 67, 77 are held hanging on spaced parallel bars 73, 75.
  • the distance between the strips 73, 75 is greater than the shaft diameter and smaller than the head diameter of the rivets, the first of which is designated 77.
  • Transverse to the row of rivets, in addition to the rivet 77 there is the inlet opening of the hose 72 and, opposite thereto, the outlet opening of a compressed air channel 79.
  • the strip 73 adjacent to it is along a width corresponding to the shaft diameter of the rivet 77 interrupted.
  • channel 79 is connected to a compressed air source (not shown here) and has a connection
  • a control for example the sequential control 281 from FIG. 17 for the device which supplies the drives (piston-cylinder units) mentioned above and the valve with the necessary actuation pulses at the right time.
  • the device works as follows:
  • a rivet 1 ejected from the hose 72 passes between the available pliers 82, 84, 86 via the receiving strips 76, 78.
  • the rivet 2 is transferred from the catching station into the receptacle 40 by moving the slide 90 downwards when the swivel arm 30, as can be determined by suitable sensors, is in the receiving position and is placed against the underside of the pliers 82, 84, 86 by corresponding actuation of the piston-cylinder unit 56.
  • the drives coupled to the levers 50, 27 receive actuation impulses so that the shaft 26, 28 with the swivel arm 30 pivots out of the receptacle position into the transfer position, provided that it is determined by suitable sensors that the hold-down device 16 is in its top dead center position. If this condition is met, the piston-cylinder unit 56 receives a pulse from the control mentioned, so that its piston extends and the shaft part 28 moves axially upward by the distance d.
  • the distance d is defined by the vertical distance from the surface of a rivet head in the receptacle 40 in the transfer position to the surface of a rivet head in the holding device 60.
  • the swivel arm 30 then lowers by reversing the piston-cylinder unit 56 by the distance d and returns to the receiving position (FIG. 2).
  • the hold-down device 16 then moves downwards with the holding device 60 to the bottom dead center position, after which the plunger 18 shoots the rivet 6 out of the holding device 60 and onto the molded body 15 by a separate drive in the main 12.
  • the sheet metal parts located there are riveted as known.
  • the return of the swivel arm 30 to the receiving position is detected by the control, which then emits an actuation pulse to the valve on the channel 79.
  • the compressed air pulse generated thereby drives the foremost rivet 77 from the strips 73, 75 into the hose 72, through which the rivet is shot into the catching station 70. A new rivet is thus ready for the driving tool 10.
  • the swivel arm 130 partially shown in FIG. 6 has a central longitudinal channel 132 connected to a vacuum shaft, not shown, which is open for receiving 140 by means of an annular channel 144 surrounding a dome 142 on the outside.
  • the height and width of the dome 142 are somewhat smaller than the cavity 110 enclosed by the hollow rivet 108.
  • the dome 142 is fastened to the swivel arm 130 by radial webs (not shown).
  • ORIGINAL DOCUMENTS Channel 132 is interrupted so that the hollow rivet 101 can be safely transferred from the swivel arm 130 into the holding device 60.
  • an open sleeve 128 can be placed on the receptacle 120 of the swivel arm 125 via the mouth of the vacuum channel 122 formed in the swivel arm 125, the clear width of which is somewhat larger than the outer diameter of the shaft of a hollow rivet.
  • FIG. 8 shows a somewhat different embodiment of the catching station 70 from FIG. 2 in the form of a catching station 170.
  • the piston 174 of a cylinder 176 carries a bushing 178, which is guided in a linearly movable manner in front of a block 171 receiving a hose end 172.
  • the cylinder 176 and the block 171 are attached to a frame, not shown.
  • baffles 177 are arranged which underlie the head of a rivet 175 arriving through the hose 172 and accommodate the shaft of the rivet 175 between them.
  • the rivet 175 passes between pliers 182 in front of the end face of the bushing 178, which engage under the head of the rivet 175 as described.
  • the rivet 175 actuates when the pliers 182 penetrate the contact arm 173 articulated at 179 on the socket 178, which acts on the cylinder 176 with pressure medium via a device (not shown) connected to the sequence control, so that the piston 174 with the socket 178 attached to it drives to the ready-made swivel arm 180 with the sleeve 188 attached.
  • the swivel arm 180 can be equipped with a
  • a hose 192 opens directly in front of a receptacle 190, which is fastened on a swivel arm 194 provided with a vacuum duct 196.
  • the receptacle 190 has three segments 191, 193, 195 which are adjacent in the circumferential direction, the two outer segments 191, 195 leaving enough space between them for the shaft of a rivet 199 to pass through. If the swivel arm 194 is located in front of the mouth of the hose 192 in the block 198, as is shown in FIG.
  • the rivet 199 which is conveyed through the hose 192 by compressed air reaches the receptacle 190 directly, the head of the rivet 199 rests on segments 191, 193, 195 and the shaft is captured between them.
  • the rivet 199 is held in the receptacle 190 by negative pressure, since the channel 196 opens into the opening between the segments 191, 193, 195.
  • FIGS. 11 and 12 show a transfer mechanism 140 which has a rotary cylinder 142 with a swivel arm 144.
  • the swivel arm 144 can be pivoted by means of the rotary cylinder 142 from the receiving station 146 to the transfer station 148 in front of a holding device provided in the mouthpiece 141 according to the type described above.
  • the rotary cylinder 142 is fastened to the piston 143 of a lifting cylinder 145, which in turn is attached to the driving machine. Rivets such as the rivet 147 are fed via a hose 152 to a catching station 155, which are of one of the embodiments described above
  • the catching station 155 the cylinder 157 of which is attached to the driving machine, can also be supported by a special strut 159 of the C-frame 158.
  • This type of transfer mechanism 140 has the advantage that only relatively few parts are moved and allows a very space-saving design.
  • FIG. 13 shows a transfer mechanism 160, the pivot arm 162 of which contains a two-part slide 164, 165.
  • the end 166 protruding from the swivel arm 162 on the side facing away from a driving-in machine 115 is articulated on the piston 168 of a cylinder 169.
  • the short part 165 of the slide 164 is provided with a receptacle 130, which consists of the opening of the swivel arm 162 and a shape of the short slide part 165 adapted to a rivet 132.
  • the swivel arm 162 can be swiveled from a receiving position (not shown) into the transfer position shown in FIG. 13 and back. In the transfer position according to FIG.
  • the receptacle 130 is located in front of a lateral opening in the mouthpiece 134 of the driving machine 115, the central channel 136 of which is provided on the wall with several rows of balls distributed in the circumferential direction according to EP-A-567 240, the balls of each row of balls 138 arranged vertically one above the other are axially movable along a loop track (not shown).
  • a rivet 132 received by the swivel arm 162 at the catching station is pushed laterally through the opening 135 in the mouthpiece 134 between the rows of balls 138 by applying a pressure medium pulse to the cylinder 169, whereupon the piston 168 extends and the slide 164, 165 drives into the swivel arm 162.
  • the front part 165 of the slide therefore pushes the rivet 132 laterally through the side opening 135 between the rows of balls 138 of the mouthpiece 134.
  • a driving tool designated as a whole with 210 is provided, with which two workpieces (not shown) can be connected to the rivet 202 by riveting.
  • the rivet 202 is top-heavy and has a shaft 208 whose length is less than the diameter of its head 207.
  • the driving tool 210 has a fixed head 212, from which a transition part 214 can be moved down a distance D and brought back again.
  • the transition part 214 houses an elongated plunger or hammer 218 in its axial center.
  • an intermediate piece 215 is fastened at the bottom, which carries a hold-down device 216.
  • the bottom dead center position of the assembly consisting of transition part 214, intermediate piece 215 and hold-down 216 is indicated by dashed lines in FIG. 1.
  • a so-called C-frame 213 is attached to the main 212 of the driving-in device 210 and extends from the main 212 in a large arc to below the bottom dead center position of the assembly and there with one pointing towards the hold-down 216 and on its axis 217 aligned mold carrier 205 is provided.
  • the hold-down device 216 essentially has the shape of a sleeve, the upper part of which consists of the ring wall 211 with the additional device 220 inserted.
  • the ring wall 211 there is at least one slot 262 parallel to the center line 217, in which the head 264 of a screw fastened in the lower part 251 of the intermediate piece 215 is captured.
  • the axial length of the slot 262 is composed of the distance d and the outer diameter of the head 264.
  • the hold-down device 216 is thus axially movable by the distance d relative to the intermediate piece 215.
  • an additional device designated as a whole by 220 and not attached to the holding-down device 216.
  • the additional device 220 has a solid block 222 which is inserted laterally into the ring wall 211 and extends radially up to a guide channel for the tappet 218.
  • opposite ends 252, 253 of the ring wall 211 each penetrate into a recess 254, 256 of the block 222.
  • the intermediate piece 215 ends above the block 222 with a shoulder 255 which, in the idle state, leaves a distance d from the opposite surface 257 of the additional device by a compression spring 260.
  • the lower end of the compression spring 260 is held in a blind bore 259 in the block 222 and the upper end of the compression spring in an aligned further blind bore 258 in the intermediate piece.
  • the space enclosed by the ring wall 211 and the part of the block 222 inside it is essentially filled up by the lower part 251 of the intermediate piece except for the guide channel for the tappet 218.
  • the underside 285 of the part 251 keeps the distance d from a radially inwardly projecting annular shoulder 267 of the hold-down device 216 in the idle state, not only because of the action of the spring 260 but also because of it
  • the lower part 251 has near its underside 285 three radial bores 242, 244, 246 which extend in a plane 288 which is transverse to the center line 217 and which are spaced apart from one another in the circumferential direction by 90 °.
  • the bores 242, 244, 246 are closed on the outside by the ring wall 211 and narrowed on the inside at the transition into a central central channel 240.
  • a steel ball 241, 243, 245 is pressed against the respective constriction by a radially acting compression spring 239, 247, 249.
  • each of the three steel balls 241, 243, 245, each with a spherical cap projects into the central channel 240.
  • a flexible plastic hose 224 opens into the outer section of the block 222 and has a cross section adapted to the shape of a rivet, so that each rivet blown with compressed air by the hose 224 during the passage through the hose 224 has a predetermined position with respect to the Maintains hose centerline.
  • the free end of the hose 224 shown in FIG. 14 is coupled, on the one hand, to a compressed air source 287 and, on the other hand, to the discharge channel 282 of an automatic ordering machine 280 or vibratory feeder according to document DE-B-42 39 683 via a slide 284.
  • the vibratory feeder described in the cited document has a bunker in which a large amount of rivets can be introduced as bulk material.
  • the vibrating feeder device forms a series of rivets from the pile of disordered rivets, the two foremost ones being designated by 204, 206 in FIG. 17 and all of them in exactly the same orientation, for example with the shaft down and head up at the outlet of the vibrating feeder be kept ready.
  • the free end of the hose 224 mentioned is connected to the discharge side of a slide 284 which transports the foremost rivet from the output rail 282 in front of the opening of the hose 224.
  • a compressed air line 286 is connected to the opposite side of the slide 284 and is connected to a compressed air source 287 via a valve 289 and a further compressed air line 288.
  • An output signal line 285 of a sequence control 281 is connected to the slide of the valve 289 and a further output signal line 283 of the sequence control 281 is connected to the slide 284.
  • the block 222 also has an outer channel 226 which is inclined at approximately 45 ° to the center line 217 and whose inside width corresponds to the outer diameter of the hose 224, so that the hose 224 is inserted into the outer channel 226 as shown and there by means not shown can be anchored.
  • the outer channel 226 continues in the block 222 into an inner channel 228.
  • the inner channel 228 is bent approximately along a quarter circle, so that the inner channel 228 laterally transversely to the center line 217 into the central channel 240, which is an axial continuation of the guide channel mentioned, at a point just below the end face 232 of the plunger 218 opens.
  • the mouth of the inner channel 228 in the central channel 240 is in the rest position at the same axial height and straight in relation to the central hole 242 of the three holes.
  • Two guide plates 234, 236, which extend transversely to the center line 217 and lie opposite one another and which leave a slot 231 along their adjacent edges 233 and 235, protrude into the inner channel 228.
  • the slot 231 is only a little wider than the outer diameter of the shaft 208, but is considerably smaller than the diameter of the head 207 on a rivet 202.
  • the guide plates 234, 236 are fastened in the inner channel 228 at a height which is at the top edge 237 of the inner channel 228 leaves a distance slightly greater than the axial thickness of the head 207 of the rivet 202. It should be borne in mind that both the hose 224 and the inner channel 228 each have rectangular cross sections.
  • the guide plates 234, 236 ensure that a rivet which has been enclosed in the inner channel 228 by compressed air through the hose 224 ends up with its head on the opposite edges of the guide plates 234, 236, with the shaft 208 following through the slot 231 depends on how the rivet 202 is shown in FIG.
  • the lower part 266 of the hold-down device 216 has a through hole 268 with a diameter which is smaller than the clear width of the space enclosed by the ring wall 211. This results in the radially protruding ring shoulder 267 at the transition from the lower part 266 to the ring wall 211, which delimits a central opening corresponding to the width of the central channel 240. Otherwise, guide means for rivets, not shown in detail, are arranged below the annular shoulder 267 within the bore 268, as described in detail, for example, for a fastening element delivery pipe in European patent application 567 240.
  • a foot 270 is formed, which has a foot plate 272 and a ring of four balls, of which the balls 274, 276, 278 are indicated in FIG. 15. Furthermore, the foot 270 has a through channel 277 which is aligned with the central channel 240.
  • Each of the four balls 274, 276, 278 is held in a radially elastically movable manner in radial bores by an O-ring 275 spanning them, so that in the through channel 277 a dome protrudes from each of the balls in a crosswise arrangement.
  • the block 222 has a radial bore 290 below the inner channel 228, in which a ball 294 which is loaded radially inwards by a spring 292 is caught in such a way that its spherical cap projects into the central channel 240.
  • the position of the radial bore 290 is selected so that its center line 286 lies by the distance d below the plane 288 in which the centers of the radial channels 242, 244, 246 lie.
  • the rivet which transports via the hose 224 and the inner channel 228 in front of the end face 232 of the plunger 218 remains in the position in which it rests on the spherical caps of the three balls 241, 243, 245 and is held on the open side by the continuous compressed air pulse.
  • the hold-down device 216 hits the sheet metal parts to be connected, the intermediate piece 215 moves further into the hold-down device 216 by the distance d, so that the rivet is then additionally held by the ball 294 by gripping its head.
  • the driving push for the plunger 218 is triggered, which pushes the rivet between the four balls 241, 243, 245, 294 through the guide present in the channel 268 and finally through the
  • ORIGINAL DOCUMENTS drives four balls 274, 276, 278 into the sheet metal parts. After riveting has been completed, the intermediate piece with the hold-down device 216 moves up again and returns to the rest position shown in FIG. 15. A new rivet can then be injected into the central channel 240.
  • the inner end of the inner channel 328 which otherwise corresponds to the inner channel 228 from FIG. 15, can be held in a carriage 320 which, according to FIG. 18, is transverse to the axis determining the driving direction 317 parallel to the plane of the opposing one Balls 343, 345 can be moved by a piston-cylinder unit, not shown.
  • a bore 390 is made in the carriage 320, which at its inner end houses a spring-loaded ball 394 corresponding to the ball 294.
  • the carriage 320 can of course also be arranged such that it can be moved vertically, ie parallel to the driving direction 317, before the opening of the central channel 140 by a piston-cylinder drive.
  • the carriage 320 is replaced by a drum 420 in which the inner channel 428 is located radially at the level of the balls 441, 443 is inserted.
  • the drum 420 is rotatable about an axis 422 perpendicular to the driving direction 417 by a rotary cylinder or the like, not shown, and the bore 490 with the spring-loaded ball 494 at the inner end is accommodated in the drum 420 at a distance from the axis of rotation 422 which is equal to the distance between ⁇ the axis of rotation 422 and the center line of the inner channel 428, which is equal to the center plane of the balls 441, 443, arranged.
  • the inner channel 528 and the spring-loaded ball 594 are seated on a turntable 520 which can be pivoted about an axis parallel to the driving direction 517 by a drive unit (not shown) and at the level of the balls 541, 543, 545 is arranged.
  • the inner channel 528 continues in the direction of the central channel 540 into a channel 542 which is adapted to the rivet shape according to the shaft and head and which opens into the central channel 540 at the level of the balls 541, 543, 545.
  • FIG. 20 shows the position of the washer 520 in preparation for the insertion of a rivet in front of the balls 541, 543, 545, and
  • FIG. 21 shows the position of the washer 520 after subsequent rotation by an angle such that the spring-loaded ball 594 is also included its spherical cap now protrudes into the central channel 540 instead of the channel 542.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
EP95925818A 1994-07-04 1995-07-04 Nietenzuführung Ceased EP0768927A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4423165 1994-07-04
DE4423165A DE4423165C2 (de) 1994-07-04 1994-07-04 Vorrichtung zum Bereitstellen von Befestigungselementen
PCT/EP1995/002580 WO1996001161A1 (de) 1994-07-04 1995-07-04 Nietenzuführung

Publications (1)

Publication Number Publication Date
EP0768927A1 true EP0768927A1 (de) 1997-04-23

Family

ID=6522053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95925818A Ceased EP0768927A1 (de) 1994-07-04 1995-07-04 Nietenzuführung

Country Status (9)

Country Link
US (1) US5964393A (ko)
EP (1) EP0768927A1 (ko)
JP (1) JP2000516538A (ko)
KR (1) KR970704530A (ko)
AU (1) AU699299B2 (ko)
CA (1) CA2194145A1 (ko)
DE (2) DE4423165C2 (ko)
TW (1) TW326006B (ko)
WO (1) WO1996001161A1 (ko)

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WO1996001161A1 (de) 1996-01-18
DE4423165C2 (de) 1996-06-20
AU699299B2 (en) 1998-11-26
DE4423165A1 (de) 1996-01-11
DE19580742D2 (de) 1999-03-11
KR970704530A (ko) 1997-09-06
US5964393A (en) 1999-10-12
CA2194145A1 (en) 1996-01-18
TW326006B (en) 1998-02-01
JP2000516538A (ja) 2000-12-12
AU2980995A (en) 1996-01-25

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