EP0290576B1 - Dispositif d'attache d'un fil metallique - Google Patents

Dispositif d'attache d'un fil metallique Download PDF

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Publication number
EP0290576B1
EP0290576B1 EP19870908080 EP87908080A EP0290576B1 EP 0290576 B1 EP0290576 B1 EP 0290576B1 EP 19870908080 EP19870908080 EP 19870908080 EP 87908080 A EP87908080 A EP 87908080A EP 0290576 B1 EP0290576 B1 EP 0290576B1
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EP
European Patent Office
Prior art keywords
plunger
bag
shaft
cam
path
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.)
Expired
Application number
EP19870908080
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German (de)
English (en)
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EP0290576A1 (fr
EP0290576A4 (fr
Inventor
Charles E. Burford
Jimmy R. Frazier
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Burford Corp
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Burford Corp
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Publication date
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Priority to AT87908080T priority Critical patent/ATE76833T1/de
Publication of EP0290576A1 publication Critical patent/EP0290576A1/fr
Publication of EP0290576A4 publication Critical patent/EP0290576A4/fr
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Publication of EP0290576B1 publication Critical patent/EP0290576B1/fr
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/04—Applying separate sealing or securing members, e.g. clips
    • B65B51/08—Applying binding material, e.g. to twisted bag necks

Definitions

  • the invention relates to apparatus for twisting a wire for closing and sealing the neck or open end of a flexible bag.
  • Apparatus of the type disclosed in U.S. Patent No. 3,138,904 to Earl E. Burford entitled “METHOD AND APPARATUS FOR TYING PACKAGES AND WRAPPING MATERAILS”; U.S. Patent No. 3,059,670 to Charles E. Burford and Leonard W. Burford entitled “WIRE TWISTING TOOL”; and U.S. Patent No. 3,919,829 to Leonard W. Buford and Charles E. Burford enitled "APPARATUS FOR TYING PACKAGES AND WRAPPING MATERIALS" is used for closing a plastic bag by attaching and twisting a wire-like ribbon about the neck of the bag.
  • Apparatus of the type disclosed in U.S. Patent No. 4,398,379 to Charles E. Burford entitled “TAB ATTACHMENT DEVICE” is also employed for closing plastic bags.
  • such devices attach a deformable plastic clip about the neck of the bag for retaining it in a closed position.
  • apparatus for twisting a wire for closing and sealing the neck or open end of a flexible bag comprising a frame; a plunger; plunger guide means; means to reciprocate said plunger linearly on said plunger guide means; means pivotally securing the plunger guide means to the frame; actuated means secured to the plunger guide means to position the plunger adjacent said path such that the plunger moves along said path as it moves in a first linear direction on said plunger guide means, wherein said plunger moves away from said path as said plunger begins to move in the opposite linear direction along said plunger guide means; bag clamp means positioned adjacent said path; and means for actuating said bag clamp means perpendicularly to said path to restrict movement of the neck of a bag longitudinally of the path as the plunger moves adjacent the bag clamp-means to adjust tension in the bag.
  • the packaging apparatus described herein incorporates a bag gathering apparatus which includes a bag clamp, positioned along the path of the neck of a bag, and a plunger which moves along the path to engage the neck of the bag adjacent the bag.
  • the plunger pulls slack out of the plastic bag, draws the bag to a controlled tension around the product in the bag, and gathers the neck of the bag.
  • the free end of a ribbon of tie material is gripped by a holder-shear assembly such that the ribbon of tie material extends across the path of the gathered neck of the bag.
  • a needle assembly wraps the ribbon of tie material about the gathered neck of the bag and positions the ribbon of tie material adjacent a twister hook. After the ribbon of tie material has been positioned around the neck of the bag and twisted, a stripper disengages the tie material from the twister hook and ejects the tied bag from the tying apparatus.
  • the apparatus incorporates an improved drive system which is particularly adapted for smooth rapid acceleration and deceleration permitting operation of the wire tying device at speeds sufficient for tying bags, for example, at a rate of 120 bags per minute.
  • a pair of cams mounted on a plunger drive shaft actuate the bag clamp and the plunger assembly to provide synchronized movement for controlling the tension to which a bag is drawn around the contents of the bag.
  • a tying cycle is initiated by actuating a clutch which controls operation of the needle assembly, the holder-shear assembly, the twister hook assembly and the stripper assembly.
  • the twister hook assembly is driven through a five position Geneva drive coupling to substantially eliminate high impact loading which sometimes accompanies rapid acceleration and deceleration of parts and assemblies of tying devices.
  • the clutch is constructed to provide a sine wave profile of acceleration and deceleration to components of the system.
  • the wire tying device generally designated by the numeral 10 in Figures 1 and 2 of the drawings is mounted adjacent a conveyor 300 of the type disclosed in Burford Patent No. 3,138,904 and Burford Patent No. 3,919,829, the diclosures of which are incorporated herein by reference in their entirety for all purposes.
  • a conveyor belt 300 carries for example, loaves 125 of bread to, through and out of wire tying device 10 in rapid succession.
  • Such conveyor 300 is well known to persons skilled in the art and further description thereof is not deemed necessary except in connection with the drive mechanism as will be hereinafter more fully explained.
  • the numeral 20 generally designates a bag gathering apparatus for moving a bag 125 along a path 12 to a position adjacent a holder-shear assembly 160, twister hook assembly 60 and needle assembly 80.
  • the free end of a ribbon of wire-like material 15 is gripped in holder-shear assembly 160
  • Plunger assembly 20 moves the neck 124 of the bag through a slot 122 in face plate 16 for drawing the bag 125 to a controlled tension about the contents thereof
  • Needle assembly 80 wraps the ribbon 15 of the wire-like material about the gathered neck of the bag and twister hook 60 is actuated for twisting a portion of the wire-like material about the neck 124 of the bag 125,
  • bag gathering apparatus 20 comprises a bag plunger 22 having a generally V-shaped notch 24 formed on the end thereof for engaging the neck 124 of the bag 125 as will be hereinafter more fully explained.
  • Plunger 22 is carried on a slide block 25 which reciprocates along plunger guide bar 30.
  • plunger guide bar 30 is pivotally secured by an arm 32 and pin 34 to the frame or housing 11 of wire tying device 10.
  • plunger guide bar 30 is secured to an arm 36 which is pivotally secured by a pin 35 to a link 38 which is in turn pivotally secured by pin 39, crank arm 40 and pin 42 to the support wall 14 of the housing of wire tying device 10.
  • a plunger actuating cam 45 has a plunger cam groove or track 46 formed therein into which a follower 44 on the end of link 38 is movably disposed.
  • Cam 45 is pinned or otherwise secured to a shaft 50 which extends through an aperture in wall 14 and is rotatably secured in ball bearings in housing 48.
  • crank arm 52 is pivotally secured by a pin 54 to wall 14 and the other end is pivotally secured by a pin 53 to an end of link 55.
  • Link 55 is secured by a pin 56 to the slide block 25 which moves bag plunger head 22 along guide bar 30.
  • Opposite ends of arm 58 are pivotally secured to a central portion of link 55 by pin 57 and to cam disc 45 by pin 59.
  • cam 45 From the position of pin 59 as illustrated in Figure 1 of the drawing, rotation of cam 45 through an angle of approximately 180° moves slide block 25 and plunger head 22 toward arm 36. Simultaneously, rotation of cam 45 imparts movement to cam follower 44 on the end of link 38 which initially pulls link 38 and arm 36 downwardly for rotating guide bar 30 about pin 34 such that plunger head 22 moves downwardly away from path 12 as movement of slide 25 toward arm 36 is initiated from the position illustrated in Figure 1. As slide block 25 moves along a central portion of guide bar 30, cam groove 46 is shaped for causing plunger head 22 to be moved toward path 12 as plunger head 22 approaches path 12 adjacent arm 36. Continued rotation of cam 45 maintains guide bar 30 in a substantially horizontal position as slide block 25 and plunger head 22 move along path 12 from a position adjacent arm 36 back to the position illustrated in Figure 1.
  • plunger head 22 reciprocates longitudinally along guide bar 30 while arm 36 on the end of guide bar 30 imparts a reciprocating motion for pivoting guide bar 30 and slide block 25 carried thereon about support pin 34.
  • shaft 50 extends through wall 14 and has a clamp cam 50a mounted thereon.
  • Cam 50a is a segmented cam having a first segment 50b and a second segment 50c secured together by bolts 50d.
  • Cam segments 50b and 50c are of substantially identical construction each having an outwardly extending lobe and a reduced portion. However, cam segment 50c is keyed or otherwise secured to shaft 50 for rotating therewith.
  • Cam sequent 50b is rotatable around shaft 50 relative to cam segment 50c such that the leading edge 50e of the lobe of the cam is adjustable relative to the trailing edge 50f of the lobe of the cam for adjusting the length of the lobe as will be hereinafter more fully explained.
  • a cam follower 60a is rotatably secured to a bag clamp actuating arm 60 and rides on the surface of cam segments 50b and 50c for imparting longitudinal reciprocating motion to actuating link 62 which is pivotally secured to bag clamp arm 65.
  • Actuating arm 60 is pivotally secured to rotate relative to a shaft 61 on which idler sprocket 74 is rotatably secured.
  • Link 62 is pivotally secured to actuating arm 60 by a pin 63 and the opposite end of link 62 is pivotally secured to bag clamp arm 65 by a pin 66.
  • a spring 64 resiliently urges cam follower 60a on actuating arm 60 into engagement with cam segments 50b and 50c.
  • a pressure foot 68 is secured to clamp arm 65 which is pivotally secured by a pin 70 to wall 14.
  • shaft 50 has a sprocket 75 mounted on the end thereof and is driven by a gathering chain 80 which extends around idler sprockets 74, 76 and 78 and is driven by a drive sprocket 82.
  • idler sprocket 78 is rotatably secured to an arm 79 which is pivotally secured to the frame of tying device 10 to permit adjustment of the tension in gathering chain 80.
  • drive sprocket 82 is mounted on a shaft 84 which is rotatably mounted in bearings 86 in a bearing block 88.
  • a coupling 90 is secured to shaft 84 and has spline teeth 92 formed on the outer surface thereof.
  • a resilient coupling 95 has internal spline teeth formed therein mating with spline teeth 92 on coupling 90 to provide a resilient torque transmitting power input source to shaft 84 and gathering chain 80.
  • deformable coupling 95 extends through an enlongated opening 96 in wall 14 of tying device 10.
  • Beating block 100 is secured to the frame of a conveyor (not shown) and rotatably supports shaft 102 in beatings 104.
  • a sprocket 105 and coupling 106 ate mounted on shaft 102, coupling 106 being provided with spline teeth 108 which extend into flexible coupling 95 and engage internal spline teeth formed therein.
  • Chain 110 extends around sprocket 105 and is driven by the conveyor drive means (not shown).
  • beating block 100 is mounted on a support frame 112 which is supported by the frame of the powered conveyor 300 or adjacent a side thereof.
  • Support frame 112 is provided with a pair of brackets 114 having slotted U-shaped openings 115 formed therein to provide a cradle into which pivot pins 116, secured to opposite side walls 11a and 11b of the frame of tying device 10, extend.
  • Pivot pins 116 are received in openings 115 and are rotatable about an axis 118 which extends generally parallel to a side of the conveyor (not shown) and which intersects and is perpendicular to an axis 119 about which drive shafts 84 and 102 and resilient coupling 95 rotate.
  • a latch arm 117 is pivotally secured to support frame 112 and is rotatable by a latch lever 117b to engage or disengage a latch pin 117c which is secured to the side wall 11a of tying device 10.
  • the frame of the tying device may be pivoted about axis 118 by disengaging latch 117a from pin 117c.
  • latch 117a from pin 117c.
  • the front of the tying device is accessible for maintenance and to facilitate routing the wire ribbon 15 through the needle assembly to the holder-shear mechanism.
  • deformable internally splined coupling 95 permits shaft 84 to move slightly out of alignment with shaft 102 while maintaining deformable coupling 95 in engagement with spline teeth 116 and 108 on couplings 90 and 106.
  • chain 110 drives coupling 106 through sprocket 105 which applies a driving torque to resilient coupling 95 for driving coupling 90, sprocket 82 and gathering chain 80.
  • gathering chain 80 imparts rotation to shaft 50 through sprocket 75.
  • Cams 50a and 45 are driven by shaft 50 for reciprocating the pressure foot 68 of bag clamp 120 while reciprocating plunger head 22 and plunger guide bar 30 in synchronized relation with movement of the conveyor 300.
  • bag clamp 120 and plunger head 22 are continuously driven in synchronized relation with the conveyor and are timed to move through a cycle of operation upon passage of each flight of the conveyor past the tying device 10.
  • one package will be moved past tying device 10 if the conveyor is fully loaded and has packages carried thereon at the maximum capacity of the conveyor 300.
  • the horizontal plane of path 12 along which the neck 124 of bag 125 moves extends through slot 122 formed in face plate 16 secured to the frame of tying device 10.
  • a pair of brushes 126 and 128 rotate to engage the neck 124 of the bag 125 to position the neck 124 in the slot 122 in face plate 16 as the bag is moved along path 12 by a conveyor 300.
  • pressure foot 68 moves upwardly from the position illustrated in full outline in Figure 7 of the drawing to the position illustrated in dashed outline to frictionally engage the neck of the-bag as plunger head 22 moves along plunger guide bar 30 from a position adjacent arm 36 toward arm 32.
  • Plunger head 22 engages the neck 124 of the bag which is restrained by pressure foot 68 to thereby draw the slack packaging material to a controlled tension around the contents of the bag and to form a gathered neck adjacent the strand of wire-like ribbon 15 and adjacent twister hook assembly 60.
  • a connecting rod 128 is pivotally secured between sprocket 75 and a clutch generally designated by the numeral 130.
  • clutch 130 When clutch 130 is energized a twisting cycle is initiated.
  • Clutch 130 is mounted on a stub shaft 132 having a sprocket 134 mounted thereon for imparting motion to an actuating chain 135 which rotates sprockets 136 and 140.
  • Actuating chain 135 extends around idler sprockets 137 and 138 and chain tensioning idler sprocket 139.
  • Chain tensioning idler sprocket 139 is mounted on an arm 139a pivotally secured to wall 14 and spring 139b maintains tension in chain 135.
  • sprocket 140 is mounted on a shaft 142 which is rotatably journaled in roller bearings mounted in bearing housing 143.
  • a shuttle cam 145 having a cam groove 146 formed therein is mounted on one end of shaft 142.
  • An electric brake 148 and cam 149 are mounted on the opposite end of shaft 142.
  • Cam 149 is positioned to actuate a microswitch 150.
  • Electric brake 148 and cam 149 are supported on a hanger 151 and bracket 152.
  • a cam follower 156 extends into cam groove 146 in cam wheel 145 and, as best illustrated in Figure 4 of the drawing, is mounted on an actuating arm 158 secured by a pin 159 to the frame of the tying device.
  • the opposite end of arm 159 is pivotally secured to a link 157 pivotally secured to the holder-shear assembly 160.
  • Holder-shear assembly 160 comprises a gripper arm 162 having a gripper finger 164 on one end thereof rotatably secured to a mounting plate 166 by a bolt 165.
  • a pair of anvils 168 and 169 are formed on the end of mounting plate 166, each being associated with shear surfaces to grip and cut a strand 15 of wire-like ribbon as will be hereinafter more fully explained.
  • Cam groove 146 is formed to move follower 156 between a first position wherein gripper finger 164 is positioned adjacent anvil 168 and a second position adjacent anvil 169.
  • the gripper arm and mounting plate 166 are symmetrical about a centerline such that the holder-shear assembly 160 may be used on a right hand or left hand machine.
  • sprocket 136 is mounted on the end of a shaft 172 which extends through support wall 14 into a gear box 174, illustrated in Figure 1, having output shafts 175 and 176 secured thereto for providing the input to a Geneva coupling 190 for driving the twister hook 215 and for rotating a cam 220 for actuating the stripper 230.
  • a needle actuating arm 180 is secured to shaft 172 and is pivotally secured to an adjustable needle link 182 which is pivotally secured to a crank arm 184 secured to a shaft 185.
  • shaft 185 is supported in roller bearings mounted in bearing housing 186 and has a curved needle 188 mounted on the outer end thereof.
  • Needle 188 carries a roller 189 on the outer end thereof and is actuated from the position shown in full outlines in Figure 1 of the drawing to the position illustrated in dashed outline and then back to the position shown in full outline upon rotation of shaft 172 through one complete revolution.
  • Geneva coupling 190 incorporates a drive member 192 secured to shaft 175 and carrying a pair of drive pins 193 and 194 which extend into guideways 195 in star wheel 196.
  • Star wheel 196 is drivingly secured to a sprocket 198 for imparting movement to a chain 200.
  • Star wheel 196 and sprocket 198 are rotatably mounted on a stub shaft 199 secured to the frame of tying device 10.
  • Chain 200 drives a sprocket 202 secured to a shaft 204 which in turn drives a sprocket 205.
  • Shaft 204 is rotatably secured to the frame of the housing of the tying device.
  • Sprocket 205 drives a chain 206 which extends about a sprocket 208 secured to the upper end of shaft 210 of the twister assembly.
  • Shaft 210 is rotatably secured in ball bearings in bearing housing 212 and has a twister hool 215 secured to the lower end thereof. Twister hool 215 is similar to the twister tools disclosed in Burford Patent No. 3,059,670 and Burford Patent No. 3,919,829.
  • the downwardly extending shaft 176 from gear box 174 has a cam wheel 220 mounted on the lower end thereof.
  • Cam wheel 220 has a cam groove 222 formed therein into which a follower 224 on a crank 225 extends.
  • Crank 225 is pivotally secured to rotate about end 226 for actuating a stripper arm 230 through a link 228.
  • Opposite ends of link 228 are pivotally secured to arm 225 and stripper 230.
  • Stripper 230 is rotatably secured by a pin 232 to the frame of the tying device.
  • the clutch generally designated by the numeral 130 includes a cam 240 having a plurality of notches 242, 244 and 245 formed in the outer periphery thereof.
  • One end of clutch link 246 is pivotally secured to shaft132 and the other end of pivotally secured to clutch arm 248 by a pin 247.
  • Cam follower 280 is pivotally secured to clutch arm 248 and is positioned to engage the periphery of cam plate 240.
  • One end of acutating link 128 is pivotally secured to clutch arm 246 and the opposite end is pivotally secured to sprocket 75.
  • sprocket 75 functions as a crank for imparting reciprocating motion to link 128 as sprocket 75 rotates about the axis of shaft 50. Reciprocating longitudinal movement of link 128 causes clutch arm 126 to oscillate between the position illustrated in full outline in Figure 2 of the drawing and the position illustrated in dashed outline.
  • clutch arm 246 oscillates through an angle of 120° upon rotation of sprocket 75 through 360° from the position illustrated in full outline in Figure 2 of the drawing to the position illustrated in dashed outline and then returns to the full outline position.
  • cam plate 240 has three notches 242, 244 and 245 circumferentially spaced 120° about the periphery thereof.
  • clutch arm 248 is configured to position follower 250 to one side of a center line of clutch arm 246 extending through shaft 132 and pin 247 such that cam plate 240 will be rotated only in a counterclockwise direction, as viewed in Figure 2 of the drawing, upon actuation of crank arm 248 through a complete cycle of operation.
  • clutch 130 is a one way clutch transmitting torque in one direction but not transferring torque in the opposition direction.
  • a bridge arm 255 is pivotally secured by a pin 256 to support wall 14 of tying device 10 and has a curved surface 258 on the end thereof which is congruent to the outer periphery of cam plate 240.
  • the opposite end of bridge arm 255 is connected through a link 259 to a rod 260 actuated by a solenoid 262.
  • a spring 265 resiliently urges bridge arm 255 toward the position illustrated in full outline in Figure 2 of the drawing.
  • solenoid 262 When solenoid 262 is actuated rod, 260 is retracted thereby pivoting bridge arm 255 about pin 256 for moving the curved surface 258 thereon into alignment with the curved surface 241 on the outer periphery of cam plate 240 to bridge across notch 242, 244 or 245 which may be positioned adjacent cam follower 250.
  • cam follower 250 cannot drop into a notch in cam plate 240 while solenoid 262 is energized.
  • a shaft 270 extends through support wall 14 and has a trigger arm 272 secured to the end thereof and extending transversely across the path 12 along which the neck 124 of bag 125 is moved.
  • a lever 274 on shaft 270 is positioned to actuate trigger switch 275 upon movement of arm 272 by a bag moving along path 12.
  • Switch 275 is electrically connected to deenergize magnetic brake 148 and solenoid 262 when a bag arrives in position and rotates arm 272.
  • sprocket 134 is provided with fifty-four teeth.
  • Sprocket 136 has eighteen teeth and sprocket 140 has thirty-six teeth.
  • rotation of sprocket 134 through an angle of rotation of 120° causes sprocket 136 to rotate through 360° and causes sprocket 140 to rotate one-half revolution or 180°.
  • Rotation of sprocket 136 through one revolution causes shaft 182 to oscillate moving the needle 188 through one complete cycle of operation from the position illustrated in full outline in Figure 1 of the drawing to the position illustrated in dashed outline and then back to the position illustrated in full outline.
  • Rotation of sprocket 140 through one-half revolution rotates shuttle cam 145 through one-half revolution thereby moving gripper finger 162 relative to mounting plate 166 from a position adjacent anvil 168 to a position adjacent anvil 169.
  • Rotation of sprocket 136 through one complete revolution also rotates the downwardly extending output shaft 176 from gear box 174 through one complete revolution thereby moving stripper cam 220 through one complete revolution to move stripper 230 from the position illustrated in Figure 4 in a clockwise direction as viewed in Figure 4 past stripper hook 215 and back to the position illustrated in Figure 4 for disengaging a twisted wire 15 from twister hook 215.
  • Rotation of sprocket 136 through one revolution rotates the upwardly extending output shaft 175 from gear box 174 through one revolution causing the five position Geneva coupling 190 to drive twister hook shaft 210 through four complete revolutions for twisting the wire.
  • cam 149 on shaft 142 actuates microswitch 150 to energize magnetic brake 148 and to energize solenoid 262.
  • bridge arm 255 When solenoid 262 is energized by microswitch 150 bridge arm 255 is pivoted in a clockwise direction about pin 256 as illustrated in Figure 2 of the drawing thereby moving the curved surface 258 on bridge arm 255 into alignment with the outer periphery 241 of cam 240 thereby preventing rotation of cam 240 by cam follower 250 until solenoid 262 is again de-energized by actuation of switch 275 upon arrival of another bag.
  • An arm 280 is urged in a counterclockwise direction as illustrated in Figure 2 of the drawing such that the end thereof engages one of the notches 242, 244 or 245 in cam plate 240 to indicate that clutch plate 242 is properly positioned for initiating a tying cycle when switch 275 is actuated.
  • the adjustable cam 50a comprising cam segments 50b and 50c which are adjustable relative to each other permits adjustment of the bag clamp 120 to provide precise control of the tension to which a bag is drawn around the contents thereof for tying.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Basic Packing Technique (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

Dispositif d'attache permettant d'attacher un ruban semblable à un fil métallique autour de l'embouchure d'un sac se déplaçant le long d'un chemin de déplacement à l'aide d'une transporteuse (300). Le dispositif d'emballage comprend un appareil de rassemblement de sacs (20) comprenant une plaque de serrage de sacs (65) positionnée adjacente au chemin de l'embouchure du sac et un plongeur (22) qui se déplace le long du chemin pour coincer l'embouchure du sac entre le mécanisme de serrage (120) et une plaque de face à fente (16) pour tendre le sac en plastique avec une tension prédéterminée. Un mécanisme d'entraînement amélioré comprenant un accouplement (190) accélère uniformément et rapidement une aiguille pour enrouler une section du ruban à fil métallique autour du col du sac, un crochet à torsader (215) pour tordre le fil métallique, un organe de serrage et cisaillement (160) du fil métallique pour tenir et couper le ruban à fil métallique et un bras d'extraction (230) pour enlever le fil métallique torsadé du crochet (215).

Claims (15)

1. Dispositif pour torsader un fil de manière à fermer et assurer l'étanchéité du col ou l'extrémité ouverte d'un sac souple , comprenant un cadre (11); un piston (22); un moyen (30) de guidage du piston; des moyens (25,52,53, 54,55,57,58,59) pour déplacer selon un déplacement linéaire alternatif ledit piston (22) sur ledit moyen (30) de guidage du piston; des moyens (32, 34) fixant le moyen (30) de guidage du piston, de manière qu'ils puissent pivoter, au cadre (11); des moyens actionnés (35,36,38,39,40,42,44) fixés au moyen (30) de guidage du piston pour positionner le piston (22) au voisinage d'un chemin ou trajet (12) de telle sorte que le piston (22) se déplace le long dudit trajet (12) lorsqu'il se déplace dans une première direction linéaire sur ledit moyen (30) de guidage du piston, ledit piston (22) s'écartant dudit trajet (12) lorsqu'il commence à se déplacer dans la direction linéaire opposée le long dudit moyen (30) de guidage du piston; des moyens (120,16,65,68,70) de serrage du sac disposés au voisinage dudit trajet (12); et des moyens (60a,60,61,62, 63,64,65,66,74) pour actionner lesdits moyens (120,16,65,68,70) de serrage du sac, perpendiculairement audit trajet (12) afin de limiter le déplacement du col (124) d'un sac (125) dans la direction longitudinale du trajet (12) lorsque le piston (22) se déplace au voisinage du moyen (120) de serrage du sac , pour régler la tension dans le sac (125).
2. Dispositif selon la revendication 1, comportant en outre des moyens (50) pour maintenir le déplacement dudit piston (22), dudit moyen (30) de guidage du piston et desdits moyens (120,16,65,68,70) de serrage du sac dans une relation prédéterminée.
3. Dispositif selon la revendication 2, dans lequel ledit moyen (50) pour maintenir le déplacement dudit piston (22), ledit moyen (30) de guidage du piston et lesdits moyens (120,16,65,68,70) de serrage du sac dans une relation prédéterminée comprennent :
   un moyen en forme d'arbre (50);
   des moyens d'entraînement (75,80,82) associés audit moyen en forme d'arbre (50); et
   un premier moyen à came (45), des seconds moyens à came (45,46) et des troisièmes moyens à came (50a, 50b,50c,50d) montés sur ledit moyen en forme d'arbre (50) et disposés de telle sorte que lesdits moyens (25,52, 53,54,55,57,58,59) de déplacement alternatif du piston, lesdits moyens actionnés (35,36,38,39,40,42,44) et lesdits moyens (60a,60,61,62,63,64,66,74) servant à actionner lesdits moyens de serrage du sac déplacent respectivement ledit piston (22), ledit moyen (30) de guidage du piston et lesdits moyens (120,16,65,68,70) de serrage du sac dans une relation prédéterminée lorsque ledit moyen d'entraînement (75,80,82) font tourner lesdits moyens en forme d'arbre (50).
4. Dispositif selon la revendication 3, dans lequel lesdits moyens d'entraînement comprennent :
   une roue dentée menée (75); une roue dentée motrice (82), et un moyen en forme de chaîne (80) engrenant avec lesdites roues dentées (75,82).
5. Dispositif selon l'une quelconque des revendications 1 à 4, dans lequel lesdits moyens (25,52,53,54,55,57,58,59) d'entraînement alternatif du piston comprennent :
   un bloc formant coulisseau (25) monté de manière à avoir un déplacement alternatif dans la direction longitudinale dudit moyen (30) de guidage du piston; un moyen de liaison (55) possédant une première extrémité (56) fixée, de manière à pouvoir pivoter, audit bloc formant coulisseau (25) et une seconde extrémité (53) fixée, de manière à être déplaçable, audit cadre (11); un bras (58), dont une extrémité (57) est fixée, de manière à pouvoir pivoter, à une partie centrale dudit moyen de liaison (55) et une seconde extrémité à laquelle est fixé un élément suiveur de came (59); et des moyens à came (45,46) disposés de manière à venir en contact avec ledit élément suiveur de came (59) pour déplacer ledit piston (22) suivant un déplacement alternatif linéaire sur ledit moyen (30) de guidage du piston.
6. Dispositif selon l'une quelconque des revendications 1 à 5, dans lequel lesdits moyens actionnés (35,36,38,39,40,42,44) comprennent :
   un moyen de liaison (38) possédant une extrémité fixée, de manière à pouvoir pivoter, audit moyen (30) de guidage du piston, et une seconde extrémité à laquelle sont fixés le moyen formant suiveur de came (44); des moyens à came (45,46) pouvant venir en contact avec lelit moyen suiveur (44); et un moyen en forme de bras (40) fixé , de manière à pouvoir pivoter, entre ledit moyen de liaison (38) et ledit cadre (11) de sorte que ledit moyen de liaison (38) déplace une extrémité dudit moyen (30) de guidage du piston autour desdits moyens à pivot (32,34).
7. Dispositif selon l'une quelconque des revendications 1 à 6, dans lequel lesdits moyens (120,16,65,68,70) de serrage du sac comprennent : un moyen formant pied presseur (68) ; et un moyen (65) fixant de façon amovible ledit moyen formant pied presseur (68), audit cadre (11) supporté par ledit moyen formant cadre adjacent au trajet (12).
8. Dispositif selon la revendication 7, dans lequel lesdits moyens (60a,60,61,62,63,64,66,74) servant à actionner lesdits moyens (120,16,65,68,70) de serrage du sac comprennent : un moyen de liaison (62) fixés audit moyen (65) fixant, de manière à pouvoir pivoter ledit moyen formant pied presseur (68); et un moyen en forme de bras (60) associé audit moyen de liaison (62) et agencé de manière à actionner ledit moyen formant pied presseur (68) entre des première et seconde positions perpendiculairement au trajet (12) de manière à limiter le déplacement du col (124) d'un sac (125) dans la direction longitudinale du trajet (12) lorsque ledit piston (22) se déplace au voisinage dudit moyen (120) de serrage du sac pour régler la tension dans le sac (125).
9. Dispositif selon l'une quelconque des revendications 1 à 8, comportant une pluralité de cames aptes à tourner de concert pour actionner ledit moyen (25) de déplacement alternatif du piston, et ledit moyen actionné (35) et ledit moyen (60) servant à actionner ledit moyen (120) de serrage du sac , d'une manière synchronisée.
10. Dispositif selon l'une quelconque des revendications 1 à 9, comprenant en outre : un moyen (80) pour positionner un ruban (15) formé d'un matériau de fermeture, transversalement audit trajet (12) pour entourer le col (124) du sac (125); un moyen (215) de torsadage du ruban, fixé de manière à pouvoir tourner audit cadre (11); et des moyens (129,128,130,135,140,142,174,190) pour faire tourner ledit moyen de torsadage (215) d'une manière synchronisée avec le déplacement dudit piston (22).
11. Dispositif selon la revendication 10, dans lequel lesdits moyens pour déplacer lesdits moyens de torsadage (215) comprennent un accouplement à croix de Malte.
12. Dispositif selon la revendication 1, comprenant en outre : un moyen en forme d'arbre (50) possédant une première extrémité et une seconde extrémité, ledit moyen en forme d'arbre (50) étant fixé , de manière à pouvoir tourner, audit cadre (11);
   des moyens d'entraînement (75,80,82) associés à la première extrémité dudit moyen en forme d'arbre (50) pour faire tourner ces derniers;
   un premier moyen à came (45) situé sur la seconde extrémité dudit arbre (50) de manière à actionner lesdits moyens (25,52,53,54,55,57,58,59) de déplacement alternatif du piston pour déplacer ledit piston (22) suivant un déplacement linéaire alternatif le long dudit moyen (30) de guidage du piston;
   des seconds moyens à came (45,46) situés sur la seconde extrémité dudit arbre (50) pour faire fonctionner lesdits moyens actionnés (35,36,38,39,40,42,44) pour appliquer un déplacement alternatif auxdits moyens (30) de guidage du piston autour desdits moyens à pivot (32,34) de manière à les rapprocher et à les écarter du trajet (12) lors de la rotation dudit arbre (50); et
   des troisièmes moyens à came (50a,50b, 50c,50d) situés sur la première extrémité dudit arbre (50) pour faire fonctionner lesdits moyens (60a,60,61,62,63,64,66,74) pour actionner lesdits moyens (120,16,65,68,70) de serrage du sac lors de la rotation dudit arbre (50).
13. Dispositif selon la revendication 3 ou 4, dans lequel il est en outre prévus un moyen (116) supportant, de façon à pouvoir pivoter, ledit cadre au voisinage d'un convoyeur (300) pour qu'il tourne autour d'un axe de support (118); et un moyen d'accouplement déformable (95) fixé , de manière à être entraîné , audit moyen d'entraînement (82), ledit moyen d'accouplement possédant un axe longitudinal d'entraînement (119), qui coupe ledit axe de support (118) de manière à permettre une rotation dudit cadre (11) autour dudit axe de support, sans allonger de façon sensible ledit accouplement déformable.
14. Dispositif selon la revendication 13, dans lequel il est en outre prévu des moyens pour positionner un ruban (15) d'un matériau de liage trnasversalement audit trajet (12); un moyen (80) enveloppant ledit ruban formé par le matériau de liage autour au col (124) du sac (125); un moyen (215) pour torsader le ruban; et un mécanisme d'entraînement (190) fixé au moyen (215) pour torsader ledit ruban formé du matériau de liage de manière à fermer le sac (125).
15. Dispositif selon la revendication 14, dans lequel ledit mécanisme d'entraînement (190) comprend : une manivelle (246); une bielle de traction (128); une plaque à came (240); un élément suiveur de came (250); des moyens fixant, de manière à pivoter , ladite bielle de traction (128) à ladite manivelle (246); un moyen (248) fixant ledit élément suiveur (250) à ladite manivelle (246) de telle sorte que ledit élément suiveur (250) s'applique contre ladite plaque à came (240) et la fait tourner lors de la rotation de ladite manivelle; un accouplement à croix de Malte (190); des moyens (135,192,174,175) entraînés par ladite plaque à came (240) pour entraîner ledit accouplement à croix de Malte (190) de telle sorte que la sortie (198,200,202,204,205,210) d'un tel accouplement à croix de Malte (190) possède un profil de vitesse sinusoïdal.
EP19870908080 1986-11-21 1987-11-23 Dispositif d'attache d'un fil metallique Expired EP0290576B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87908080T ATE76833T1 (de) 1986-11-21 1987-11-23 Drahtbindeanordnung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93456086A 1986-11-21 1986-11-21
US934560 1986-11-21

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EP0290576A1 EP0290576A1 (fr) 1988-11-17
EP0290576A4 EP0290576A4 (fr) 1989-03-14
EP0290576B1 true EP0290576B1 (fr) 1992-06-03

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EP (1) EP0290576B1 (fr)
JP (1) JPH01501788A (fr)
AU (1) AU610107B2 (fr)
DK (1) DK409688D0 (fr)
WO (1) WO1988003898A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5272518A (en) * 1990-12-17 1993-12-21 Hewlett-Packard Company Colorimeter and calibration system
CN114751006B (zh) * 2022-02-28 2024-02-27 厦门海普锐科技股份有限公司 捆扎装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740921A (en) * 1970-07-29 1973-06-26 Optima Maschinenfab Buhler M Device for closing bags
GB8314764D0 (en) * 1983-05-27 1983-07-06 Thurne Eng Co Ltd Machine for closing filled bags

Also Published As

Publication number Publication date
JPH01501788A (ja) 1989-06-22
AU610107B2 (en) 1991-05-16
EP0290576A1 (fr) 1988-11-17
DK409688A (da) 1988-07-21
DK409688D0 (da) 1988-07-21
WO1988003898A1 (fr) 1988-06-02
EP0290576A4 (fr) 1989-03-14
AU8331187A (en) 1988-06-16

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