US3705647A - Apparatus for checking the circumferential edge surface and the diameter of disc-shaped objects - Google Patents

Apparatus for checking the circumferential edge surface and the diameter of disc-shaped objects Download PDF

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Publication number
US3705647A
US3705647A US100748A US3705647DA US3705647A US 3705647 A US3705647 A US 3705647A US 100748 A US100748 A US 100748A US 3705647D A US3705647D A US 3705647DA US 3705647 A US3705647 A US 3705647A
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United States
Prior art keywords
support
disc
support member
members
movement
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Expired - Lifetime
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US100748A
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English (en)
Inventor
Ake Torgny Bergavist
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Svenska Metallverken AB
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Svenska Metallverken AB
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    • 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
    • B07C5/06—Sorting according to size measured mechanically
    • B07C5/065—Sorting according to size measured mechanically with multiple measuring appliances adjusted according to different standards, for example length or thickness, which detect the shape of an object so that if it conforms to the standard set by the measuring appliance, it is removed from the conveyor, e.g. by means of a number of differently calibrated openings
    • 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
    • B07C5/06—Sorting according to size measured mechanically

Definitions

  • ABSTRACT An apparatus for checking disc-like objects for edge defects and deviations in the diameter of said objects from a predetermined standard diameter.
  • the apparatus includes a movement path for the objects being checked whichis defined by two support members.
  • the object supporting members are arranged to move in a parallelistic pattern of movement in relation 18 Claims, 3 Drawing Figures APPARATUS FOR CHECKING THE CIRCUMFERENTIAL EDGE SURFACE AND THE DIAMETER OF DISC-SHAPED OBJECTS
  • the present invention relates to an apparatus for checking the circumferential edge surface and the diameter of disc-shaped objects.
  • the subject of the present invention affords an apparatus by means of which the peripheral edgesurface and diameter of precision-cut circular, disc-shaped objects can be checked at very high speeds with a constant degree of accuracy which far surpasses that achieved by habitual action.
  • the present invention is mainly characterized by a chute-like structure which is flanked by two spaced, support members which are movable relative to each other and along which objects are intended to be passed one at a time while rotating around their center axis under the influence of a driving force created by the relative movement between the'two support members, of which two members one presents a support and rolling surface which engages at least a portion of the peripheral edge surface of a perfectly shaped object while the other of said two members presents, when viewed in section, a tapering groove, the respective flank surfaces of which form a supporting and rolling surface for respective corner edge portions of the object being checked, wherein at least one of said support members is movable in a parallclistic movement pattern in relation to the opposite support member to urge an object in said path towards said opposite support member and to subject said object to a moment of force with the fulcrum point situated on said opposite support member, and wherein located between the support members on the sideof the movement path for a correctly shaped disc is a ful
  • FIG. 1 is a top plan view of an apparatus according to the invention for checking the cylindrical edge portions and diameters of disc-like objects produced by punching for example, and illustrates (a) the objects in a position of readiness, waiting to be fed to the apparatus, (b) with full lines a disc-like object being checked in accordance with the invention and occupying a first feed position, and (c) with broken lines a disc-like object occupying a disc-reject position in the apparatus.
  • FIGS. 2 and 3 are sectional views taken through the line I--l in FIG. 1, showing a disc being checked in a checking path extending through the apparatus and a rejected disc being removed from said path, respectively.
  • the reference numeral 10 identifies an inlet for discs 11 located in a position of readiness, from which they are fed to and checked in the apparatus.
  • the inlet 10 has a U- shaped profile, the upstanding members or flanks of which are in the form of two substantially parallel guide strips 12 and 13 which guide the discs 11 one after the other towards-a withdrawable catch 14.
  • the inlet 10, i.e., the U-shaped profile is covered over a region extending behind and infront of the catch 14 with a U- shaped cover plate 15, the side flanges 16 of which engage'around the external surfaces of the guide strips 12 and 13.
  • the main purpose of the guide plate 15 is to guide and direct each disc to be checked in the apparatus in a manner whereby the disc will initially take a correct position for a checking operation, which operation commences subsequent to the disc passing the catch member 14.
  • the means by which the disc-like object is checked comprises a chute or similar structure 17 which, in the exemplary embodiment, is arcuate in shape and to which the inlet 10 is connected substantially tangentially.
  • the chute 17, which in the exemplary embodiment is assumed to be stationary, is defined externally by an arcuate flange 18 of relatively low height which merges substantially tangentially with a guide flange 19 which, together with a further edge-forming guide flange 20 positioned opposite said flange l9, and an intermediate support surface 21 defines an outlet 22 for checked, accepted discs leaving the apparatus.
  • a circumferentially grooved pulley or the like Mounted for rotation around the same geometric center axis as that of the flange 18 of the chute 17 is a circumferentially grooved pulley or the like, generally shown at 23, which in addition to being able to rotate is also yieldingly movable in the direction of its geometrical axis, i.e., in a direction perpendicular to the plane of FIG. 1, a disc, e.g., the disc 24, which while rotating around its rotary axis is checked. in the chute 17, is yieldingly clamped with its peripheral edge abutting the inside of the arcuate flange 18 and with each sharp corner edge portion of the disc bearing against its respective flank surface of the opposing V-shaped flank surfaces of the pulley 23, as hereinafter described with reference to FIGS.
  • the disc 24 illustrated in FIG. 1 with full lines is assumed to be defective at 25, i.e., has an incomplete edge surface and'consequently shows an incorrect diameter when measured across its face.
  • the disc 24 has just enteredthe checking chute 17 and since the imperfect portion 25 of the disc 24 is presumed to have not yet come into contact with either the flange 18 or the said flank surfaces (not shown in the Figure) of the pulley 23 it is retained in the chute in the same manner as though it were a perfectly round disc.
  • the disc is shown by broken lines, indicated at 240, in a position of continued advancement through the apparatus. In this position, however, the defective edge portion of the disc, here identified with the reference numeral 25a, is in contact with the flank surfaces of the groove extending around the periphery of the pulley 23.
  • the checking means immediately detect the error in diameter and surface fault of the disc and reacts to swing the disc free from the chute 17 in a manner whereby the disc is ejected as a result of its pivoting, as will be described hereinafter in more detail with reference to FIGS. 1 and 2.
  • each correctly formed disc is retained in the checking path throughout the entire distance from the catch 14 to the outlet 22, whereas a defective disc is ejected from the path 17, immediately a defective edge portion of the disc is rotated against the flange 18 or the flank surfaces of the groove in the pulley 23.
  • the discs 11 located in the position of readiness for feeding to the inlet move in the direction of arrow A without being rotated.
  • the disc for example the disc 24
  • the disc is caused to rotate in response to the rotary movement of the pulley 23, the disc being forced to roll between the flank surfacesof the groove in the pulley 23 and the flange 18.
  • a defective portion such as at 25a, contacting either the flank surfaces of the groove or the flange 18, the disc while still rotating will be ejected from the chute 17 as a reject.
  • Perfect discs will rotate along the whole length of the chute 17 and be discharged through the outlet 22, which leads to a collecting station for checked and accepted discs, or directly to a station for continued treatment.
  • the checking apparatus comprises principally a main body 26 provided with a shaft 27, wherein the body 26 on the shaft 27 are both through-passed in the longitudinal direction of the shaft 27 by a bore 28.
  • a rotation spindle 29 for the pulley 23 is mounted for rotation and longitudinal movement in the bore 28.
  • the other end of the spindle is shown in the drawing by the reference numeral 30 and is rigidly connected with a drive shaft 31, which is powered or optionally manually driven so as to drive the spindle 29 of the pulley 23 in the direction of the arrow 32.
  • the other end of the shaft 27 bears against a plate or the like 33 which is free in relation to the shaft 27 and the drive shaft 31 is provided with a corresponding annular flange 34, a pressure type coil spring 35 being arranged between plate 33 and the flange 34.
  • the spring arrangement just described serves to pull the spindle 29 and the pulley 23 yieldingly in the direction of arrow B, either to stop position 36 or, alternatively, to a position in which the energy stored in the spring is substantially consumed.
  • a correctly formed disc 24b is located in the chute 17, in a position which corresponds substantially to the position of the imperfect disc 24a illustrated in FIG. 1.
  • the disc 24b is held clamped between the flange 18 and the flank surfaces 38 and 39 of the V-shaped groove 37 in the pulley 23 as a result of the pulley being moved through a short distance in a direction away from the main body 26 and because of compression of the spring 35.
  • at least a portion of the peripheral cylindrical surface or edge of the disc is urged against the flange 18 while the sharp corner edge portions thereof bear against respective flank surfaces 38 and 39 of the groove 37.
  • the disc 24b is also supported, at least in the vicinity of the flange 18, by a support surface 40 located in the chute 17.
  • the disc 24b which is conceived as being perfect with regard to its diameter and edge surface, will thus continue to rotate along the entire checking path in the chute 17, from the inlet 10 to the curved outlet 22 positioned beneath said inlet, through which outlet the disc finally passes to be conducted to a suitable collecting station for checked and accepted discs.
  • the imperfect disc 24a occupies the same position as that occupied in the embodiment of FIG. 1, which means that the local reduction in diameter of the disc 24a at the defective portion 25a (FIG. 1) is too large to enable the disc in this position to be retained in the path of movement for correctly formed discs.
  • the pulley 23 will suddenly be incapable of retaining the disc in a path of movement corresponding to the path of movement of perfect discs, whereupon the spring 35 pulls the pulley downwardly towards the stop shoulder 36 and, as a result of the initiation of the aforementioned force moment the disc is tilted.
  • a shoulder 41 which is concentric with the pulley and the flange 18 and which can be considered a stop member or fulcrum point about which the imperfect disc is tilted.
  • the fulcrum point or stop 41 is arranged in a position whereby the upper portion thereof is substantially out of contact with a disc which rotates through the checking apparatus in the path of movement characteristic for discs having a correct periphery, but in a manner whereby imperfect discs, subsequent to rotating a certain distance through the checking path, are urged against the fulcrum by means or the pulley 23, when the disc is no longer able to move in the movement path for perfect discs, whereupon the discwill have for its point of rotation the fulcrum member 41 instead of the flange 18.
  • the catch 14 in the embodiments of FIG. 2 and 3 comprises a single wire spring which is secured to the under portion of the main body 26 by means of a curved portion 42. The other end of the spring presents a bent portion 43 located beneath and in contact with the underneath of the pulley 23.
  • the wire spring catch member which is also shown in FIG. 2, is let into a substantially radially extending groove 44 in the main body 26.
  • the wire spring catch 14 is located out of the groove 44 and occupies a position in which it prevents another disc from entering the checking path while the disc 24 is present therein.
  • the disc 24a is no longer in the checking path, the pulley 23 being momentarily pulled down against the shoulder 36.
  • the pulley 23 during this downward movement also acts upon the catch 14 to force it into the groove 44, whereupon it no longer blocks the entrance for the next disc arriving from the inlet 10.
  • the pulley is lifted as a result of the said engagement with the disc and the catch 14 automatically returns to the position in which it prevents the discs 11 located at the inlet from entering the checking path.
  • the size and cross-sectional shape of the flange 18 may be such that the height of the flange substantially coincides with the thickness of the disc, although is preferably smaller than the disc thickness.
  • the flange may present a surface along which the discs can roll, this surface being substantially oval in cross section, possibly in the formrof a rounded raised surface, or may also be of a certain, specific width.
  • the surface may also be inclined in a manner whereby the whole of the disc is in contact therewith or only a part of the disc engages the surface.
  • the flange l8 and the flanking surfaces of the groove may lie at substantially the same level or be located at different levels.
  • An apparatus for checking the circumferential edge surface and the diameter of disc-like objects characterized by a chute-like structure which is flanked by two spaced, support members which are movable relative to each other and along which objects are intended to be passed one at a time while rotating around their center axis under the influence of a driving force created by the relative movement between the two support members, of which two members one presents a support and rolling surface which engages at least a portion of the peripheral edge surface of a perfectly shaped object while the other of said two members presents, when viewedin section, a tapering groove, the respective flank surfaces of which form a supporting and rolling surface for respective corner edge portions of the object being checked, wherein at least one of said support members is movable in a parallelistic movement pattern in relation to the opposite support member to urge an object in said path towards said opposite support member and to subject said object to a moment of force with the fulcrum point situated on said opposite support member, and wherein located between the support members on the side of the movement path for a correctly shaped disc is
  • An apparatus characterized in that the chute or like structure is provided with an inlet for unchecked objects and an outlet for checked and accepted objects, catch means being arranged to cooperate with said inlet to prevent the infeed of objects to the chute while an object is being checked therein, said catch means being arranged to be actuated out of its blocking position by at least one said support means as soon as an object has left the chute.
  • An apparatus characterized in that one support member is non-rotatable and that the other support member is rotatable about said common center axis.
  • An apparatus characterized in that the shaft is arranged to be yieldingly actuated for movement in an axial direction through a distance corresponding to the shortened distance between the support and rolling surfaces of the pulley and the support and rolling surface of said other support member.
  • An apparatus characterized in the support and rolling surface of said one support member is stationarily arranged substantially in a radial plane relative to the geometric axis of the shaft and that the pulley is movable between several such radial planes.
  • An apparatus characterized in that extending concentrically with the rolling surface of said one support surface is a raised circular fulcrum means which is located to one side of the movement path travelled by a correctly formed object between the support members and which projects into the individual movement path imperfectly formed object.
  • An apparatus characterized in that at least one of the support and rolling surfaces extends obliquely to the common center axis of the support members.
  • An apparatus characterized in that said one support member is provided with an object carrying surface, said surface suitably being located in the vicinity of the support and rolling surface of said support member.
  • An apparatus characterized in that the support and rolling surface of said one support member extends along an arc of less than 360, and that guide rails are connected substantially tangentially to the ends of said are, said rails defining the inlet and outlet respectively of the chute defined by the support members.
  • An apparatus characterized in that the rails are inclined downwardly said outlet, whereby checked and accepted objects are able to move under the force of gravity down to an underly-

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sorting Of Articles (AREA)
  • Prostheses (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Testing Of Coins (AREA)
US100748A 1969-12-23 1970-12-22 Apparatus for checking the circumferential edge surface and the diameter of disc-shaped objects Expired - Lifetime US3705647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE17829/69A SE335431B (xx) 1969-12-23 1969-12-23

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US3705647A true US3705647A (en) 1972-12-12

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US100748A Expired - Lifetime US3705647A (en) 1969-12-23 1970-12-22 Apparatus for checking the circumferential edge surface and the diameter of disc-shaped objects

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Country Link
US (1) US3705647A (xx)
JP (1) JPS4921209B1 (xx)
CA (1) CA923300A (xx)
DE (1) DE2061010A1 (xx)
FR (1) FR2073952A5 (xx)
GB (1) GB1331976A (xx)
SE (1) SE335431B (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900634A (en) * 1972-07-21 1975-08-19 Glaverbel Glazing panel with conductive strips
CN110052415A (zh) * 2019-05-29 2019-07-26 南京工业职业技术学院 一种仓储物流用分拣机
CN112326215A (zh) * 2020-09-18 2021-02-05 建湖金洋科技有限公司 一种轨道交通垫片生产用检测装置
CN110052415B (zh) * 2019-05-29 2024-06-04 南京工业职业技术学院 一种仓储物流用分拣机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543802A (en) * 1947-01-14 1951-03-06 American Can Co Sorting mechanism for blanks
US2716487A (en) * 1952-09-20 1955-08-30 Illinois Tool Works Nut and washer assembly selector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543802A (en) * 1947-01-14 1951-03-06 American Can Co Sorting mechanism for blanks
US2716487A (en) * 1952-09-20 1955-08-30 Illinois Tool Works Nut and washer assembly selector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900634A (en) * 1972-07-21 1975-08-19 Glaverbel Glazing panel with conductive strips
CN110052415A (zh) * 2019-05-29 2019-07-26 南京工业职业技术学院 一种仓储物流用分拣机
CN110052415B (zh) * 2019-05-29 2024-06-04 南京工业职业技术学院 一种仓储物流用分拣机
CN112326215A (zh) * 2020-09-18 2021-02-05 建湖金洋科技有限公司 一种轨道交通垫片生产用检测装置

Also Published As

Publication number Publication date
SE335431B (xx) 1971-05-24
CA923300A (en) 1973-03-27
FR2073952A5 (xx) 1971-10-01
DE2061010A1 (de) 1972-05-25
GB1331976A (en) 1973-09-26
JPS4921209B1 (xx) 1974-05-30

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