US3511371A - Machine for automatically inspecting and packaging tubular articles - Google Patents

Machine for automatically inspecting and packaging tubular articles Download PDF

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Publication number
US3511371A
US3511371A US693307A US3511371DA US3511371A US 3511371 A US3511371 A US 3511371A US 693307 A US693307 A US 693307A US 3511371D A US3511371D A US 3511371DA US 3511371 A US3511371 A US 3511371A
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United States
Prior art keywords
tube
tubes
tubular articles
probe
machine
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US693307A
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Theodore L Giusti
Donald P Horn
John A Seifert
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Corning Glass Works
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Corning Glass Works
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
    • G07C3/14—Quality control systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/08—Sorting according to size measured electrically or electronically
    • B07C5/083—Mechanically moved sensing devices, the movement of which influences the electric contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/46—Machines having sequentially arranged operating stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0096—Transport of discharge tube components during manufacture, e.g. wires, coils, lamps, contacts, etc.
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0096—Transport of discharge tube components during manufacture, e.g. wires, coils, lamps, contacts, etc.
    • H01J2893/0098—Vessels

Definitions

  • a machine including rotatable chucks for holding tubular articles near their ends, gauging means in the vicinity of each chuck and movable along with it during its rotation for detecting defects in the ends of the tubular articles and a reject gate associated with each chuck for diverting defective articles from their normal path in the machine. After inspection, those articles which are not rejected are stacked in a jig, end caps are placed around the ends of the stacked tubes, the end caps are tied and the resultant bundles art ejected from the machine.
  • This invention relates to the inspection and packaging of tubular articles, such as glass tubing of the type used in fluorescent light bulbs.
  • tubular articles such as glass tubing of the type used in fluorescent light bulbs.
  • Such glass tubing is drawn at high rates from the glass-melting furnace, and as soon as the tubing has cooled sufficiently and while the tubing is still on the draw, it is severed into lengths suitable for fabrication into the final product.
  • the lengths When the lengths are to be incorporated into fluorescent bulbs, their ends must be reheated and formed with a high degree of precision too permit them subsequently to be sealed to the other bulb components.
  • apparatus for receiving a plurality of tubes carried in transverse orientation along an input conveyor, the apparatus comprising a pair of rotatable chucks which grasp the tubes near their ends and a plurality of gauges which are movable along with the tubing in the chucks.
  • a reject gate movable in response to signals emitted by the gauges causes defective tubes to be diverted from the normal course through the packaging apparatus. Tubes which are found satisfactory proceed to a jig where they are stacked and packaged by means of end caps. The packages are then ejected from the jig and conveyed from the apparatus.
  • FIG. 1 is a side plan view of the inspecting and packaging apparatus of the invention.
  • FIG. 2 is a top view of the apparatus of FIG. 1.
  • FIG. 3 is an end view illustrating the tube chuck and the feed mechanism therefor.
  • FIG. 4 is a side view, partly in section, of the actuating mechanism for a gauge.
  • FIG. 5 is a partial sectional view taken on line 5-5 of FIG. 4.
  • FIG. 6 is a partial sectional view taken on line 66 of FIG. 4.
  • FIG. 7 is a developed view of the cams which control the movement of the gauge of FIG. 4.
  • FIG. 8 is a side plan view of the chuck and its associated feed-in system.
  • FIG. 9 is a side plan view of the loading jigs.
  • FIG. 10 is a side plan view of the package ejector mechanism.
  • FIG. 11 is a side view, partly in section, of a tube chuck.
  • FIG. 12 is a sectional view taken on line 1212 of FIG. 11.
  • FIG. 13 is a side plan view of the stacker supply rail.
  • FIG. 14 is an enlarged side view of the stop gate at the entrance to the stacker.
  • FIG. 15 is an end view of the stop gate assembly of FIG. 14.
  • FIG. 16 is an end view of the stacker assembly.
  • FIG. 17 is a plan view of the stacker showing a row of bulbs on the stacker supply shelf.
  • FIG. 18 is an end elevational view of the stacker supply shelf in closed position.
  • FIG. 19 is an end elevational view of the stacker supply shelf in open position.
  • FIG. 20 is an end elevational view of the bundle capping assembly.
  • FIG. 21 is an end elevation view of the end cap clamp.
  • FIG. 22 is a side elevational view of the end cap supply section
  • FIG. 23 is a sectional view showing the construction of the gauges utilized in inspecting the tubes.
  • glass tubes 10 are fed by input peg chain conveyors 12 into the inspecting and packaging apparatus, which is essentially symmetric about a vertical longitudinal plane, thereby making possible the supporting, inspecting and packaging of the tubes at each end thereof, the tubes being maintained in spaced relation by means of pegs 14.
  • bypass gates 16 are in the position illustrated in FIG. 8, permitting the tubes to be transferred from input conveyors 12 to tube feed conveyors 18 by which they are deposited in notches in star wheels 20.
  • the tubes, which are maintained in the star wheels by means of guides 22 are transferred to chucks 24, where their ends are inspected and defective tubes rejected.
  • bypass gates 16 are moved to their forward positions, illustrated by the broken lines in FIG. 8, thereby causing the tubes to be deposited successively on bypass rails 25 and bypass conveyors 27, 56 and 31, leading to a storage station 3-3.
  • each of chucks 24 has a plurality of tube retaining pockets 26.
  • a tube is transferred into the chucks at position 1, illustrated in FIG. 8.
  • spring loaded jaws 28, illustrated in FIG. 11, engage the tube and prevent its movement.
  • Jaws 28 are pivotally attached to arms 30, which pivot about shafts 32.
  • the jaws are normally spring loaded by means of springs 34 to a closed position; however, as the chucks rotate about stationary cams 36, cam followers 38 on supports 40 to which shafts 3 2 pivotally connected cause the jaws to open at position 5 and to remain open until aftter another tube has been deposited therein at position 1.
  • reject gates 50 move forward to the position shown by the broken lines in FIG. 8, thus cooperating with stationary guides 52 to form a path for a rejected tube to rotating star wheels 54, which deposit the rejected tube on peg chain bypass conveyors 56.
  • bypass conveyors 56 From bypass conveyors 56 the tubes are carried by second bypass conveyors 31 to storage station 33 in the same manner as tubes which are intentionally caused to bypass the machine.
  • gauges 58 The location of gauges 58 is illustrated in FIG. 3, and the actuating mechanism for a typical gauge is illustrated in FIGS. 4-7.
  • Each gauge is resiliently mounted on a shaft 60 by means of a spring 61 located within a hollow shaft 62 projecting from, and integral with, ball screw 64.
  • Ball screw 64 is rotatable in ball nut 66, which is, in turn, rigidly mounted on slide 68.
  • Slide 68 is keyed to gauge drive mechanism mount 70 in the manner illustrated in FIG. 6.
  • Slide 72 is rigidly attached to slide 68 and is free to move longitudinally relative to gauge drive mechanism mount 70, movement being facilitated by ball bearings 74.
  • lower slide 76 is longitudinally movable with respect to mount 70.
  • Lower slide 76 is, in turn, rigidly connected to ball screw housing 78, and ball screw 64 is rotatably mounted in housing 78, as illustrated in FIG. 5, so as to permit rotation of the ball screw, while preventing longitudinal movement of the ball screw relative to the housing.
  • Gauge drive mechanism mount 70 is rigidly attached to chuck 24 by bolts, such as bolt 82, while chuck 24 is rigidly connected to drive shaft 80. Accordingly, when shaft 80 is rotated, the rotation is transmitted to chuck 24, from chuck 24 to mount 70, from mount 70 to lower slide 76 and, by means of slide 72 to upper slide 68 and thence to ball nut 66. Thus, the entire gauge assembly rotates along with the chuck. As rotation is effected, upper slide cam follower 84 and lower slide cam follower 86 move along groove cams 88 and 90 which are formed in the cylindrical surface of stationary drums 92 and 94.
  • FIG. 7 Developed views, i.e., views showing the generally circular cam paths as flattened as if the cylindrical drums 92 and 94 were opened and flattened into planes, are shown in FIG. 7.
  • cam followers move from position 1 to position 2, illustrated in FIG. 8, they are advanced toward the tubing at the same rate, such that there is no relative motion between slides 68 and 76.
  • the gauge since there is no relative motion between ball screw 64 and ball nut 66, there is no rotation of gauge 58, the gauge merely being moved into contact with the end of tube 10.
  • the gauge which is spring loaded, contacts the tube end slighly before position 2.
  • cam path 88 continues to move in the direction of the tube, while cam path 90 remains at a uniform distance from the tube.
  • slide 76 to which ball screw housing 78 is rigidly attached, has no longitudinal motion, the longitudinal motion of slide 68 in the direction of the tube causes ball screw 64 to be rotated by means of ball nut 66, thereby effecting rotation of gauge 58 through 180.
  • the need for only 180 rotation of the gauge will be described hereinafter as part of the detailed description of the gauge construction.
  • the cam paths are again parallel and move away from the tube, thereby withdrawing the gauge from contact with the tube without rotating the gauge. From position 4 back to position 1, the distance between cam path 88 and the tube progressively increases, while the distance from cam path 90 and the tube remains constant.
  • slide 76 and ball screw housing 78 are maintained in constant longitudinal positions, while slide 68 and ball nut 66 move away from the tube, thereby effecting rotation of ball screw 64 through 180 in a direction opposite to its previous direction of rotation.
  • the gauge having made a complete revolution about drive shaft 80 is thcn in position to repeat the described cycle with reference to a new tube.
  • gauges 58 The construction of gauges 58 is illustrated in FIG. 23.
  • Each gauge comprises two sets of probes 96, 98 which contact the ends of the tubes as the gauge is rotated. Inasmuch as the respective sets of probes are identical, only one set is illustrated in the drawing.
  • Each set of probes comprises an adjustable set of contact points 114 and 108, and a set of fixed contact points 11 0 and 112. It is because the respective sets of probes are located 180 apart with respect to the tube circumference that the entire tube end may be scanned by the gauge by rotation of the gauge through only 180.
  • Each probe is held by two parallel springs 100 and 102. The springs are biased such that in the absence of pressure on the probe ends from the tube end the probe ends project beyond contact plate 104.
  • Probe 98 is adjusted by adjustment of lower adjustment screw 108, which is mounted on but electrically insulated from probe 96. Because fixed contact points and 112, which are rigidly mounted on probe 98, but which are electrically insulated therefrom, are spring-biased against lower adjustable contact point 108. Points 112 and 108 remain in contact as long as the probe is out of contact with a tube end. Probe 98 is adjusted to project beyond probe 96 when the probes are not in contact with the tube end by a distance equal to the maximum permissible variation in tube end configuration. The gap between upper fixed contact point 110 and upper adjustable contact point 114 when the probes are in the illustrated position is equal to twice the maximum tube variation.
  • probe 98 when a tube is brought into contact with contact plate 104, thereby causing retraction of probes 96 and 98, probe 98 will be caused to retract relative to probe 96 by the amount of permissible tube end variation, thereby causing fixed contact points 110 and 112 to be spaced from the respective adjustable contact points by an amount equal to the maximum permissible tube end variation.
  • Fixed contact points 110 and 112 are attached to a source of electric power, as indicated in FIG. 23.
  • a defect of sufiicient magnitude is present in a tube end, relative motion between the tube probes will cause one of the fixed contact points to effect electrical connection with its associated adjustable contact point.
  • An electric circuit is thereby completed, and electric power is supplied to a time delay mechanism for moving reject gates 50 at each end of the tube to their closed position to cause the defective tube to be deposited on bypass conveyor 56.
  • the two sets of probes are electrically connected in parallel, so that a signal from either set will close the reject gates.
  • reject gates 50 When inspection indicates a tube to be free from defects, reject gates 50 remain in the open position, and the tube is deposited on supply rails 44. Initially the tube is moved along the supply rail by means of peg chain conveyors 116, illustrated in FIG. 8. Subsequently, movement of the tubes is effected by means of pegs 46 on overhead feed-in chains 48. Pegs 46 are spring loaded, so that in the event of the build up of tubes on the supply rail, they can pass over the tubes without damaging the tubes or the stacking mechanism. Three build-up switches 118, illustrated in FIG. 13, are located above the supply rail. When a malfunction of the apparatus allows tubes to build up on the supply rails to the extent that the three build-up switches are actuated simultaneously, a signal is transmitted to move reject gates 50 to their closed position, thereby diverting subsequent tubing to bypass conveyor 56.
  • stacker supply shelf 120 At the end of supply rail 44 is a stacker supply shelf 120, illustrated in FIGS. 9, l4 and 16-19, used for loading in succession eight jigs 122. The jigs travel intermittently through the loading position on chains 124, as illustrated in FIGS. 9 and 10. As indicated in FIGS. 17-19, stacker supply shelf supports nine tubes. As shown in FIG. 14, overhead feed-in chains 48 terminate at the entrance to the supply shelf. At one end of the supply shelf are located two tube detector switches 126, illus trated in FIG. 17. When the force exerted by the tubes on the switches becomes sufiicient, the switches transmit a signal to stop gates 128, thereby causing the stop gates to pivot down between the ninth and tenth tubes, as shown in FIG. 15.
  • the supply shelf pivots to its open position, as illustrated in FIG. 19, and a row of nine tubes is deposited on index supports 129.
  • the index supports which are carried on ball nut 130 are caused to lower by a distance equal to the tubing diameter by rotation of ball screw 132.
  • the supply shelf subsequently pivots back to its closed position, and the stop gate is raised to allow another row of nine tubes to travel to the supply shelf.
  • the cycle is then repeated until seven rows of nine tubes have been deposited in the jig.
  • the index supports are lower than the bottom surface of the jig, as illustrated by the broken lines in FIG. 16, and the tubes are supported entirely by the jig.
  • a signal is then transmitted to initiate movement of chains 124, thereby bringing another jig into position to be loaded.
  • a supply of end caps 136 which may be formed of cardboard, are supported by four horizontal guide rails 138.
  • the end caps are automatically advanced in the direction of the tubes by a feed mechanism comprising a ball screw driven by means of motor 142 through forward and reverse clutch 144.
  • the motor runs continuously during operation and drives the end cap feed mechanism only .when the forward or reverse clutch is energized.
  • An electrical eye 146 emits a signal to cause disengagement of the forward clutch when an end cap is between the electric eye and the light source, thereby limiting the forward motion of the supply of end caps.
  • the end caps are removed from the supply section by a cylinder 150 having suction cups 152 mounted so as to move with the cylinder rod.
  • the entire assembly is mounted so as to be rotatable about axis 154, and the cylinder rod is longitudinally movable.
  • the capping mechanism can move from the position at which it picks up an end cap to the location of the ends of the tubing to be capped.
  • Bunn Package Tieing Machine style M1631. Subsequent to tieing, the bundle is ejected by bundle ejector 164 to conveyor 166 by which the finished bundle is conveyed from the machine.
  • Apparatus for inspecting tubular articles comprising at least one chuck member
  • said chuck member having a generally circular periphery provided with a plurality of pockets adapted to receive tubular articlesoriented generally parallel to said axis,
  • inspecting means adapted to move into and out of engagement with an end of a tubular article held in said chuck member, 1
  • a movable guide member having an arcuate surface in opposition to said periphery of said chuck member adapted to guide tubular articles and to retain tubular articles in said pockets of said chuck member, the center of curvature of said arcu'ate surface being generallly at the axis of rotation of said chuck member,
  • first conveyor means for conveying tubular articles to said chuck member
  • said guide member being movable along and generally parallel to said periphery of said chuck member in response to signals from said inspecting means to modify the location at which tubular articles are discharged from said chuck member to cause defective tubular articles to be deposited on said second conveyor and to cause acceptable articles to be deposited upon said third conveyor.
  • Apparatus according to claim 1 which includes fourth conveyor means leading from said first conveyor means to said third conveyor means and means for selectively diverting tubular articles from said first conveyor means to said fourth conveyor means.
  • Apparatus according to claim 1 which includes two said chuck members adapted to hold tubular articles in the vicinity of the ends thereof and means for rotating said chucks to cause the pockets therein to move in unison along parallel paths.
  • said probes being spring-biased from said support in the direction of said chuck and being reciprocable along parallel paths
  • said first probe having two electric contact points spaced apart in a direction parallel to said paths
  • said second probe having an electric contact located between said electric contact points of said first probe and movable between said contact points of said first probe to effect electric connection therewith when said probes are displaced with respect to one another along said paths by a predetermined distance
  • Apparatus according to claim 1 which includes a support member fixed to said chuck member and rotatable therewith,
  • said inspecting means being mounted on said ball screw
  • a second probe said probes being spring-biased from said support in References Cited the direction of said chuck and being reciprocable UNITED STATES PATENTS along parallel paths, said first probe having two electric contact points 3,024,905 3/1962 f 209-80 spaced apart in a direction parallel to said paths, 10 3,073,444 1/1963 Blehnskl 20974 said second probe having an electric contact located 3,080,659 3/1963 Wolford 209 88 X between said electric contact points of said first 3,085,685 4/1963 Rlvely 20988 X probe and movable between said contact points of said first probe to effect electric connection therewith when said probes are displaced with respect to 15 one another along said paths by a predetermined distance,

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Specific Conveyance Elements (AREA)
  • Basic Packing Technique (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)
  • Sorting Of Articles (AREA)

Description

May 12, 1970 T. GIUSTI ETA!- 3,511,371 MACHINE FOR AUTOMATICALLY INSPECTING AND I PACKAGING TUBULAR ARTICLES Filed Dec. 26, 1967 I 14 Sheets-Sheet 1 IN VE N TORS. T heodore L. Giusfi Donald P. H y John A. .Sei gfif wall fla D. 701M AGE/VT May 12, 1970 T. L. GlUSTl ETAL 3,511,371
MACHINE FOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed Dec. 26, 1967 14 Sheets-Sheet 2 Theodore L. 6iusfi Donald P. Horn y John A. Seiferf INVENTORS.
AGENT May 12, 1970 s ug-r ETAL 3,511,371
MACHINE FOR AUTOMATICALLY INSPEC'I'ING AND PACKAGZENG TUBULAR ARTICLES Filed Dec. 26, 1967 14 Sheets-Sheet 5 INVE N TORS. Theodore L. Giush Donald R Horn John A. Seiferf woo/om z rw AGENT May 12, 1970 T. 1.. GIUST] ETAL 3,511,371
MACHINE FOR AUTOMATICALLY INSPECTING AND Filed Dec. 26, 1967 PACKAGING TUBULAR ARTICLES 14 Sheets-Sheet 4.
Position I Posi'rion4 1 F 88 Position 3 Fig.5
m E V .5 K q 3 (1. i .5 s I i: 8 /NVENT0 R$. Theodore L. 6103!: q Donald H orn w M John A. .Se/ferf May 12, 1970 l T. L. GIUSTI ETAL 3,511,371
' MACHINE FOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed Dec. 26, 1967 14 Sheets-Sheet 5 Match Line with Fig.9
Fig. 8
IN VE NTQRS Theodore L. 6/usf/ Donald P. Horn John A. Sea/fer! AGE/V7 May 12, 1970 PACKAGING TUBULAR ARTICLES 14 Sheets-Sheet 6 Filed Dec. 26, 1967 0 H \n\ m w O n T6, [lull N ELH../ A W V8 Nw d wmm 00 DJ O O D O O O O O O 0 O O O O G .5: o m 9m ii :4 532 g NE w I! AGENT May 12, 1970 T. L. GIUSTI ETA!- MACHINE FOR AUTOMATICALLY INSPECTING AND Filed Dec. 26, 1967 PACKAGING TUBULAR ARTICLES 14 Sheets-Sheet v Match Line L with Fig. 9
[N VE N TORS. Theodore L. Giusfi Donald P. Horn Jo/m A. Se/fen AGE/VT May 12, 1970 T. L. GlUSTl ET AL MACHINE FOR AUTOMATICALLY INSPEC'IING AND PACKAGING'TUBULAR- ARTICLES Filed Dec. 26, 1967 14 Sheets-Sheet 8 IN VE NTQRS. Theodore L. Gzush 0 GOOD AGENT May 12, 1970 T. L. GlUSTl ETAL 3,511,371 MACHINE FOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed Dec. 26, 1967 14 Sheets-Sheet 9 fiVE/vw/P Theadore L 6/usf/ Donald P. Horn John A. Sezferf May 12, 1970 T. 1.. GIUSTI ETA!- 3,511,371
MACHINE FQR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed Dec. 26', 1967 14 Sheets-Shegt 10 IN VE N 70 56. Theodore L. 6105/: Donald P. Horn John A. Safari [dz/d am AGE/VT May 12, 1970 T. L. GIUSTI ETA!- 5 5 MACHINE FOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed Dec. 26, 1967 14 Sheets-Sheet 11 IN VE N 7' QRS. Theodore L. 6/usf/ Donald P. Horn y John A. Se/ferf B I AGENT May 12, 1970 v ems-n ETAL 3,511,371
MACHINE FOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed DeC.. 26, 1967 14 Sheets-Sheet 12 //V VE N TORS.
Theodore L. Gius/i Donald R Horn John A. Seiferf May 12, 1970 usn ETAL 3,511,371
- MACHINEFOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed DEC. 26, 1967 14 Sheets-Sheet 15 /NVENTO /-?5. Theodore L. G/usfI Donald F. Horn John A. SeIferf AGENT May 12, 1970 T. L. GIUSTI ETA!- 3,511,371
MACHINE FOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Filed Dec. 26, 1967 14 Sheets-Sheet 14.
ELECTRICAL POWER SOURCE 96/ w fiflos 50 Y F WMD-ZM Y A6ENT- United States Patent 3,511,371 MACHINE FOR AUTOMATICALLY INSPECTING AND PACKAGING TUBULAR ARTICLES Theodore L. Giusti, Donald P. Horn, and John A. Seifert, Providence, R.I., assignors to Corning Glass Works, Corning, N.Y., a corporation of New York Filed Dec. 26, 1967, Ser. No. 693,307 Int. Cl. B07b 13/04 US. Cl. 209-74 7 Claims ABSTRACT OF THE DISCLOSURE A machine including rotatable chucks for holding tubular articles near their ends, gauging means in the vicinity of each chuck and movable along with it during its rotation for detecting defects in the ends of the tubular articles and a reject gate associated with each chuck for diverting defective articles from their normal path in the machine. After inspection, those articles which are not rejected are stacked in a jig, end caps are placed around the ends of the stacked tubes, the end caps are tied and the resultant bundles art ejected from the machine.
BACKGROUND OF THE INVENTION This invention relates to the inspection and packaging of tubular articles, such as glass tubing of the type used in fluorescent light bulbs. Such glass tubing is drawn at high rates from the glass-melting furnace, and as soon as the tubing has cooled sufficiently and while the tubing is still on the draw, it is severed into lengths suitable for fabrication into the final product. When the lengths are to be incorporated into fluorescent bulbs, their ends must be reheated and formed with a high degree of precision too permit them subsequently to be sealed to the other bulb components.
Previously it has been the practice to inspect the tube ends visually and to reject those which visual observation showed to be defective. Those tubes which passed such inspection were then manually loaded into packages for shipping.
It is an object of the present invention to provide apparatus for automatically inspecting the ends of tubular articles with greater reliability and precision than is obtainable by visual inspection and for packaging only those articles indicated by such inspection to be satisfactory.
SUMMARY OF THE INVENTION According to the invention, there is provided apparatus for receiving a plurality of tubes carried in transverse orientation along an input conveyor, the apparatus comprising a pair of rotatable chucks which grasp the tubes near their ends and a plurality of gauges which are movable along with the tubing in the chucks. A reject gate movable in response to signals emitted by the gauges causes defective tubes to be diverted from the normal course through the packaging apparatus. Tubes which are found satisfactory proceed to a jig where they are stacked and packaged by means of end caps. The packages are then ejected from the jig and conveyed from the apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side plan view of the inspecting and packaging apparatus of the invention.
FIG. 2 is a top view of the apparatus of FIG. 1.
FIG. 3 is an end view illustrating the tube chuck and the feed mechanism therefor.
FIG. 4 is a side view, partly in section, of the actuating mechanism for a gauge.
Patented May 12, 1970 FIG. 5 is a partial sectional view taken on line 5-5 of FIG. 4.
FIG. 6 is a partial sectional view taken on line 66 of FIG. 4.
FIG. 7 is a developed view of the cams which control the movement of the gauge of FIG. 4.
FIG. 8 is a side plan view of the chuck and its associated feed-in system.
FIG. 9 is a side plan view of the loading jigs.
FIG. 10 is a side plan view of the package ejector mechanism.
FIG. 11 is a side view, partly in section, of a tube chuck.
FIG. 12 is a sectional view taken on line 1212 of FIG. 11.
FIG. 13 is a side plan view of the stacker supply rail.
FIG. 14 is an enlarged side view of the stop gate at the entrance to the stacker.
FIG. 15 is an end view of the stop gate assembly of FIG. 14.
FIG. 16 is an end view of the stacker assembly.
FIG. 17 is a plan view of the stacker showing a row of bulbs on the stacker supply shelf.
FIG. 18 is an end elevational view of the stacker supply shelf in closed position.
FIG. 19 is an end elevational view of the stacker supply shelf in open position.
FIG. 20 is an end elevational view of the bundle capping assembly.
FIG. 21 is an end elevation view of the end cap clamp.
FIG. 22 is a side elevational view of the end cap supply section, and
FIG. 23 is a sectional view showing the construction of the gauges utilized in inspecting the tubes.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, glass tubes 10 are fed by input peg chain conveyors 12 into the inspecting and packaging apparatus, which is essentially symmetric about a vertical longitudinal plane, thereby making possible the supporting, inspecting and packaging of the tubes at each end thereof, the tubes being maintained in spaced relation by means of pegs 14. During normal operation of the apparatus, bypass gates 16 are in the position illustrated in FIG. 8, permitting the tubes to be transferred from input conveyors 12 to tube feed conveyors 18 by which they are deposited in notches in star wheels 20. The tubes, which are maintained in the star wheels by means of guides 22 are transferred to chucks 24, where their ends are inspected and defective tubes rejected. When it is desired to bypass the inspecting and packaging mechanism entirely, bypass gates 16 are moved to their forward positions, illustrated by the broken lines in FIG. 8, thereby causing the tubes to be deposited successively on bypass rails 25 and bypass conveyors 27, 56 and 31, leading to a storage station 3-3.
As shown in FIGS. 11 and 12, each of chucks 24 has a plurality of tube retaining pockets 26. A tube is transferred into the chucks at position 1, illustrated in FIG. 8. As the chuck is rotated to bring the tube to positiotn 2, spring loaded jaws 28, illustrated in FIG. 11, engage the tube and prevent its movement. Jaws 28 are pivotally attached to arms 30, which pivot about shafts 32. The jaws are normally spring loaded by means of springs 34 to a closed position; however, as the chucks rotate about stationary cams 36, cam followers 38 on supports 40 to which shafts 3 2 pivotally connected cause the jaws to open at position 5 and to remain open until aftter another tube has been deposited therein at position 1. At position 5, tubes which are not defective drop from the chuck onto 3 supply rail 44 along which they are moved by pegs 46 on overhead feed-in chain 48.
When a tube is sensed to be defective, reject gates 50 move forward to the position shown by the broken lines in FIG. 8, thus cooperating with stationary guides 52 to form a path for a rejected tube to rotating star wheels 54, which deposit the rejected tube on peg chain bypass conveyors 56. From bypass conveyors 56 the tubes are carried by second bypass conveyors 31 to storage station 33 in the same manner as tubes which are intentionally caused to bypass the machine.
The location of gauges 58 is illustrated in FIG. 3, and the actuating mechanism for a typical gauge is illustrated in FIGS. 4-7. Each gauge is resiliently mounted on a shaft 60 by means of a spring 61 located within a hollow shaft 62 projecting from, and integral with, ball screw 64. Ball screw 64 is rotatable in ball nut 66, which is, in turn, rigidly mounted on slide 68. Slide 68 is keyed to gauge drive mechanism mount 70 in the manner illustrated in FIG. 6. Slide 72 is rigidly attached to slide 68 and is free to move longitudinally relative to gauge drive mechanism mount 70, movement being facilitated by ball bearings 74. Similarly, lower slide 76 is longitudinally movable with respect to mount 70. Lower slide 76 is, in turn, rigidly connected to ball screw housing 78, and ball screw 64 is rotatably mounted in housing 78, as illustrated in FIG. 5, so as to permit rotation of the ball screw, while preventing longitudinal movement of the ball screw relative to the housing.
Gauge drive mechanism mount 70 is rigidly attached to chuck 24 by bolts, such as bolt 82, while chuck 24 is rigidly connected to drive shaft 80. Accordingly, when shaft 80 is rotated, the rotation is transmitted to chuck 24, from chuck 24 to mount 70, from mount 70 to lower slide 76 and, by means of slide 72 to upper slide 68 and thence to ball nut 66. Thus, the entire gauge assembly rotates along with the chuck. As rotation is effected, upper slide cam follower 84 and lower slide cam follower 86 move along groove cams 88 and 90 which are formed in the cylindrical surface of stationary drums 92 and 94. Developed views, i.e., views showing the generally circular cam paths as flattened as if the cylindrical drums 92 and 94 were opened and flattened into planes, are shown in FIG. 7. As the cam followers move from position 1 to position 2, illustrated in FIG. 8, they are advanced toward the tubing at the same rate, such that there is no relative motion between slides 68 and 76. Thus, since there is no relative motion between ball screw 64 and ball nut 66, there is no rotation of gauge 58, the gauge merely being moved into contact with the end of tube 10. The gauge, which is spring loaded, contacts the tube end slighly before position 2. Between positions 2 and 3 cam path 88 continues to move in the direction of the tube, while cam path 90 remains at a uniform distance from the tube. Thus, slide 76, to which ball screw housing 78 is rigidly attached, has no longitudinal motion, the longitudinal motion of slide 68 in the direction of the tube causes ball screw 64 to be rotated by means of ball nut 66, thereby effecting rotation of gauge 58 through 180. The need for only 180 rotation of the gauge will be described hereinafter as part of the detailed description of the gauge construction. Between position 3 and position 4, the cam paths are again parallel and move away from the tube, thereby withdrawing the gauge from contact with the tube without rotating the gauge. From position 4 back to position 1, the distance between cam path 88 and the tube progressively increases, while the distance from cam path 90 and the tube remains constant. Thus, slide 76 and ball screw housing 78 are maintained in constant longitudinal positions, while slide 68 and ball nut 66 move away from the tube, thereby effecting rotation of ball screw 64 through 180 in a direction opposite to its previous direction of rotation. The gauge, having made a complete revolution about drive shaft 80 is thcn in position to repeat the described cycle with reference to a new tube.
The construction of gauges 58 is illustrated in FIG. 23. Each gauge comprises two sets of probes 96, 98 which contact the ends of the tubes as the gauge is rotated. Inasmuch as the respective sets of probes are identical, only one set is illustrated in the drawing. Each set of probes comprises an adjustable set of contact points 114 and 108, and a set of fixed contact points 11 0 and 112. It is because the respective sets of probes are located 180 apart with respect to the tube circumference that the entire tube end may be scanned by the gauge by rotation of the gauge through only 180. Each probe is held by two parallel springs 100 and 102. The springs are biased such that in the absence of pressure on the probe ends from the tube end the probe ends project beyond contact plate 104. The distance by which probe 96 projects from the contact plate is varied by means of adjustment screw 106. Probe 98 is adjusted by adjustment of lower adjustment screw 108, which is mounted on but electrically insulated from probe 96. Because fixed contact points and 112, which are rigidly mounted on probe 98, but which are electrically insulated therefrom, are spring-biased against lower adjustable contact point 108. Points 112 and 108 remain in contact as long as the probe is out of contact with a tube end. Probe 98 is adjusted to project beyond probe 96 when the probes are not in contact with the tube end by a distance equal to the maximum permissible variation in tube end configuration. The gap between upper fixed contact point 110 and upper adjustable contact point 114 when the probes are in the illustrated position is equal to twice the maximum tube variation. Thus, when a tube is brought into contact with contact plate 104, thereby causing retraction of probes 96 and 98, probe 98 will be caused to retract relative to probe 96 by the amount of permissible tube end variation, thereby causing fixed contact points 110 and 112 to be spaced from the respective adjustable contact points by an amount equal to the maximum permissible tube end variation.
Fixed contact points 110 and 112 are attached to a source of electric power, as indicated in FIG. 23. When a defect of sufiicient magnitude is present in a tube end, relative motion between the tube probes will cause one of the fixed contact points to effect electrical connection with its associated adjustable contact point. An electric circuit is thereby completed, and electric power is supplied to a time delay mechanism for moving reject gates 50 at each end of the tube to their closed position to cause the defective tube to be deposited on bypass conveyor 56. The two sets of probes are electrically connected in parallel, so that a signal from either set will close the reject gates.
When inspection indicates a tube to be free from defects, reject gates 50 remain in the open position, and the tube is deposited on supply rails 44. Initially the tube is moved along the supply rail by means of peg chain conveyors 116, illustrated in FIG. 8. Subsequently, movement of the tubes is effected by means of pegs 46 on overhead feed-in chains 48. Pegs 46 are spring loaded, so that in the event of the build up of tubes on the supply rail, they can pass over the tubes without damaging the tubes or the stacking mechanism. Three build-up switches 118, illustrated in FIG. 13, are located above the supply rail. When a malfunction of the apparatus allows tubes to build up on the supply rails to the extent that the three build-up switches are actuated simultaneously, a signal is transmitted to move reject gates 50 to their closed position, thereby diverting subsequent tubing to bypass conveyor 56.
At the end of supply rail 44 is a stacker supply shelf 120, illustrated in FIGS. 9, l4 and 16-19, used for loading in succession eight jigs 122. The jigs travel intermittently through the loading position on chains 124, as illustrated in FIGS. 9 and 10. As indicated in FIGS. 17-19, stacker supply shelf supports nine tubes. As shown in FIG. 14, overhead feed-in chains 48 terminate at the entrance to the supply shelf. At one end of the supply shelf are located two tube detector switches 126, illus trated in FIG. 17. When the force exerted by the tubes on the switches becomes sufiicient, the switches transmit a signal to stop gates 128, thereby causing the stop gates to pivot down between the ninth and tenth tubes, as shown in FIG. 15. Subsequently, the supply shelf pivots to its open position, as illustrated in FIG. 19, and a row of nine tubes is deposited on index supports 129. Next, the index supports, which are carried on ball nut 130 are caused to lower by a distance equal to the tubing diameter by rotation of ball screw 132. The supply shelf subsequently pivots back to its closed position, and the stop gate is raised to allow another row of nine tubes to travel to the supply shelf. The cycle is then repeated until seven rows of nine tubes have been deposited in the jig. After the seventh and last cycle, the index supports are lower than the bottom surface of the jig, as illustrated by the broken lines in FIG. 16, and the tubes are supported entirely by the jig. A signal is then transmitted to initiate movement of chains 124, thereby bringing another jig into position to be loaded.
After leaving the stacking area the jig carrying the tubes passes to the bundle cappers, designated generally by the numeral 134 in FIG. 1, further details being shown in FIGS. 20-22. A supply of end caps 136, which may be formed of cardboard, are supported by four horizontal guide rails 138. The end caps are automatically advanced in the direction of the tubes by a feed mechanism comprising a ball screw driven by means of motor 142 through forward and reverse clutch 144. The motor runs continuously during operation and drives the end cap feed mechanism only .when the forward or reverse clutch is energized. An electrical eye 146 emits a signal to cause disengagement of the forward clutch when an end cap is between the electric eye and the light source, thereby limiting the forward motion of the supply of end caps. The end caps are removed from the supply section by a cylinder 150 having suction cups 152 mounted so as to move with the cylinder rod. The entire assembly is mounted so as to be rotatable about axis 154, and the cylinder rod is longitudinally movable. Thus, the capping mechanism can move from the position at which it picks up an end cap to the location of the ends of the tubing to be capped.
As shown in FIGS. 20 and 21, four flaps on the end caps are maintained about the ends of the stack of tubes by means of four arms 156 on the capping device. Before the stack of tubes is moved to the location at which a string is tied around the flaps on the end caps, end cap brackets 158 are lowered over and around each end cap in order to maintain it around the tube ends prior to tieing. The end cap brackets travel along overhead rods 160. When the bundle reaches the string tier, indicated generally by numeral 162, a string is wound around the flaps of each end cap, thereby securing the cap over the ends of the tubing. The details of the string tier will not be discussed, inasmuch as such devices are well known and commercially available on the open market. One such device is that known in the art as the Bunn Package Tieing Machine, style M1631. Subsequent to tieing, the bundle is ejected by bundle ejector 164 to conveyor 166 by which the finished bundle is conveyed from the machine.
What is claimed is:
1. Apparatus for inspecting tubular articles, said apparatus comprising at least one chuck member,
means for rotating said chuck member about an axis,
said chuck member having a generally circular periphery provided with a plurality of pockets adapted to receive tubular articlesoriented generally parallel to said axis,
inspecting means adapted to move into and out of engagement with an end of a tubular article held in said chuck member, 1
a movable guide member having an arcuate surface in opposition to said periphery of said chuck member adapted to guide tubular articles and to retain tubular articles in said pockets of said chuck member, the center of curvature of said arcu'ate surface being generallly at the axis of rotation of said chuck member,
first conveyor means for conveying tubular articles to said chuck member,
second conveyor means for conveying defective articles from said chuck member, and
third conveyor means for conveying acceptable articles from said chuck member,
said guide member being movable along and generally parallel to said periphery of said chuck member in response to signals from said inspecting means to modify the location at which tubular articles are discharged from said chuck member to cause defective tubular articles to be deposited on said second conveyor and to cause acceptable articles to be deposited upon said third conveyor.
2. Apparatus according to claim 1 which includes fourth conveyor means leading from said first conveyor means to said third conveyor means and means for selectively diverting tubular articles from said first conveyor means to said fourth conveyor means.
3. Apparatus according to claim 1 in which said third conveyor leads to means for packaging tubular articles.
4. Apparatus according to claim 1 which includes two said chuck members adapted to hold tubular articles in the vicinity of the ends thereof and means for rotating said chucks to cause the pockets therein to move in unison along parallel paths.
5. Apparatus according to claim 1 in which said inspect means comprises support means,
a first probe,
a second probe,
said probes being spring-biased from said support in the direction of said chuck and being reciprocable along parallel paths,
said first probe having two electric contact points spaced apart in a direction parallel to said paths,
said second probe having an electric contact located between said electric contact points of said first probe and movable between said contact points of said first probe to effect electric connection therewith when said probes are displaced with respect to one another along said paths by a predetermined distance,
means forming an electric circuit including said contact on said second probe and at least one said contact point on said first probe, and
means for actuating said guide member to a position to cause tubular articles held in said chuck member to be fed to said second conveyor when said electric circuit is completed.
6. Apparatus according to claim 1 which includes a support member fixed to said chuck member and rotatable therewith,
a ball nut slidably mounted on said support member to permit movement in the direction of said chuck member,
a ball screw rotatably mounted in said ball nut,
said inspecting means being mounted on said ball screw,
means for moving said ball screw and said ball nut in unison toward and away from said chuck member, and
means for effecting relative rotation between said ball screw and said ball nut to cause rotation of said inspecting means.
7 8 7. Apparatus according to claim 6 in which said inmeans for actuating said guide member to a position specting means comprises to cause tubular articles held in said chuck member support means, to be fed to said second conveyor when said electric a first probe, circuit is completed.
a second probe, said probes being spring-biased from said support in References Cited the direction of said chuck and being reciprocable UNITED STATES PATENTS along parallel paths, said first probe having two electric contact points 3,024,905 3/1962 f 209-80 spaced apart in a direction parallel to said paths, 10 3,073,444 1/1963 Blehnskl 20974 said second probe having an electric contact located 3,080,659 3/1963 Wolford 209 88 X between said electric contact points of said first 3,085,685 4/1963 Rlvely 20988 X probe and movable between said contact points of said first probe to effect electric connection therewith when said probes are displaced with respect to 15 one another along said paths by a predetermined distance,
means forming an electric circuit including said contact on said second probe and at least one said contact point on said first probe, and 20 RICHARD A. SCHACHER, Primary Examiner US. Cl. X.R. 209-80, 88
US693307A 1967-12-26 1967-12-26 Machine for automatically inspecting and packaging tubular articles Expired - Lifetime US3511371A (en)

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CN104986401A (en) * 2015-05-07 2015-10-21 沧州四星玻璃股份有限公司 Glass tube product conveying and packaging line and conveying method
CN105921418A (en) * 2016-07-11 2016-09-07 台山市远博机械科技有限公司 Full-automatic bowl/dish/cup classification aligner
CN106000887A (en) * 2016-06-12 2016-10-12 台山市远博机械科技有限公司 Full-automatic chopstick and spoon garbage classification machine
CN107117568A (en) * 2017-07-08 2017-09-01 江苏省疾病预防控制中心 The automatic screwing mechanism of cryovial and its method of work for disease blood testing
CN114671078A (en) * 2022-05-11 2022-06-28 江苏泗阳协力轻工机械有限公司 Vertical type tube drawing packaging machine
CN117262611A (en) * 2023-11-20 2023-12-22 泰州市华鸿制冷设备厂 Automatic feeding mechanism for condenser tube manufacturing

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CN103480587A (en) * 2013-08-29 2014-01-01 合肥雄鹰自动化工程科技有限公司 Removing and transporting device for stacking robot production line
CN104986401A (en) * 2015-05-07 2015-10-21 沧州四星玻璃股份有限公司 Glass tube product conveying and packaging line and conveying method
CN104986401B (en) * 2015-05-07 2017-06-06 沧州四星玻璃股份有限公司 A kind of glass tube product bull ladle wiring and carrying method
CN106000887A (en) * 2016-06-12 2016-10-12 台山市远博机械科技有限公司 Full-automatic chopstick and spoon garbage classification machine
CN106000887B (en) * 2016-06-12 2018-09-11 台山市远博机械科技有限公司 A kind of fully automatic chopstick spoon garbage machine
CN105921418A (en) * 2016-07-11 2016-09-07 台山市远博机械科技有限公司 Full-automatic bowl/dish/cup classification aligner
CN105921418B (en) * 2016-07-11 2018-04-13 台山市远博机械科技有限公司 A kind of full-automatic dishes cup classification correcting machine
CN107117568A (en) * 2017-07-08 2017-09-01 江苏省疾病预防控制中心 The automatic screwing mechanism of cryovial and its method of work for disease blood testing
CN114671078A (en) * 2022-05-11 2022-06-28 江苏泗阳协力轻工机械有限公司 Vertical type tube drawing packaging machine
CN114671078B (en) * 2022-05-11 2024-03-29 江苏泗阳协力轻工机械有限公司 Vertical glass tube packaging machine
CN117262611A (en) * 2023-11-20 2023-12-22 泰州市华鸿制冷设备厂 Automatic feeding mechanism for condenser tube manufacturing
CN117262611B (en) * 2023-11-20 2024-01-26 泰州市华鸿制冷设备厂 Automatic feeding mechanism for condenser tube manufacturing

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DE1817210A1 (en) 1969-07-24
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NL6818618A (en) 1969-06-30
JPS4813464B1 (en) 1973-04-27

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