EP0488075A2 - Vorrichtung zur Qualitätsüberwachung, besonders für Schrauben, Bolzen und dergleichen - Google Patents

Vorrichtung zur Qualitätsüberwachung, besonders für Schrauben, Bolzen und dergleichen Download PDF

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Publication number
EP0488075A2
EP0488075A2 EP91119943A EP91119943A EP0488075A2 EP 0488075 A2 EP0488075 A2 EP 0488075A2 EP 91119943 A EP91119943 A EP 91119943A EP 91119943 A EP91119943 A EP 91119943A EP 0488075 A2 EP0488075 A2 EP 0488075A2
Authority
EP
European Patent Office
Prior art keywords
screws
bolts
checking
section
stem
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.)
Withdrawn
Application number
EP91119943A
Other languages
English (en)
French (fr)
Other versions
EP0488075A3 (en
Inventor
Enrico Ghezzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INGRAMATIC Srl
Original Assignee
INGRAMATIC Srl
Ingramatic SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INGRAMATIC Srl, Ingramatic SpA filed Critical INGRAMATIC Srl
Publication of EP0488075A2 publication Critical patent/EP0488075A2/de
Publication of EP0488075A3 publication Critical patent/EP0488075A3/en
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a quality control device particularly for screws, bolts and the like.
  • the aim of the present invention is to eliminate or substantially reduce the disadvantages described above by providing a quality control device particularly for screws, bolts and the like which performs an exhaustive control of a production batch and excludes human intervention almost entirely.
  • an object of the present invention is to provide a quality control device which discriminates and eliminates screws and/or bolts exceeding certain preset parameters.
  • Not least object of the present invention is to provide a quality control device particularly for screws, bolts and the like which is relatively easy to manufacture and at competitive costs.
  • a quality control device particularly for screws, bolts and the like, comprising an electromagnetic vibrating feeder for feeding screws and bolts, characterized in that said electromagnetic vibrating feeder feeds screws and bolts to a conveyance and checking station, said station comprising a section for checking the head of said screws and/or bolts and a section for checking the stem of said screws and/or bolts, said head checking section being adapted for removing said screws and/or bolts from said electromagnetic vibrating feeder and for conveying said screws and/or bolts, through analysis means, toward said stem checking section, said stem checking section being provided with reading means, means for the selective discharge of said screws and/or bolts being provided downstream of said stem checking station.
  • the station 2 comprises a section 3 for checking the head of the screws and/or bolts and a section 4 for checking the stem thereof.
  • the head checking section 3 removes the screws and/or bolts from the electromagnetic vibrating feeder 1 and conveys the screws and/or bolts through analysis means, as better described hereinafter, toward the stem checking section 4.
  • Said stem checking section is provided with reading means, as better explained hereinafter.
  • Means 5 for the selective discharge of the screws and/or bolts are furthermore provided downstream of the stem checking section 4.
  • the head checking section 3 comprises means for gripping and carrying the screws and/or bolts through the analysis means; said analysis means comprise a lighting unit 6 and an optical detector 7 for detecting the lateral image of the head.
  • the lighting unit 6 and the optical detector 7 are arranged on opposite sides with respect to the grip and conveyance means.
  • the analysis means furthermore comprise a photocell 8 for detecting the presence of machinings performed on the head.
  • the grip and conveyance means comprise two co-planar and parallel supports 10 and 11 which define, between them, a lane 12 for the passage of the screws and/or bolts.
  • Each support 10 and 11 supports, at its ends, pulleys 13, 14 and 15, 16 on which the related conveyance belts 17 and 18 of the screws and/or bolts engage.
  • the support 11 supports, with its structure, a step motor 19 which transmits motion to a pair of pulleys 13 and 15 by means of an elastic belt 20 and a driving pulley 21.
  • the supports 10 and 11 are rigidly fixed to a frame which is constituted by uprights 22 and 23.
  • a step motor 24 is mounted on the upright 22 and transmits motion to a screw to adjust the internal size of the lane 12.
  • the operation of the head checking section is as follows: a screw, indicated by the reference numeral 25, is inserted by the electromagnetic vibrating feeder 1 into the lane 12, i.e. said screw is hung by its head between the conveyance cables 17 and 18 and is conveyed thereby toward the inspection region.
  • the optical detector 7 detects the dimension, i.e. the height, of said head. Said height is compared with the standard height and it is thus determined whether it is within the standard or not. In the latter case, the screw is subsequently discarded.
  • the stem checking section 4 comprises a transversely concave chute 26 onto which the screws are fed by the head checking section 3, or rather the chute 26 is provided, at the end adjacent to the section 3, with an abutment 28 against which the stem of the screw 25 collides, allowing it to turn over and arranging the screw 25 on the chute 26 as shown in figure 5.
  • the chute 26 is provided with a transverse gap 27, at which reading means are provided.
  • Said reading means comprise a lighting unit 29, which is arranged at and below the gap 27, and an optical detector 30, which is arranged opposite to the lighting unit 29.
  • an optical detector 30 which is arranged opposite to the lighting unit 29.
  • photocells 32 and 33 which provide synchronization to the lighting unit and to the detector 30 in the presence of a screw 25.
  • the lighting unit 29, the optical detector 30 and the photocells 32 and 33 are rigidly associated with the chute 26 and are mounted thereon by means of a bracket 38 which is fixed laterally to the chute 26 at the gap 27.
  • the gap 27 has no transparent panels but is open. This is done since the arrangement of sheets of transparent material, such as transparent plastics or the like, constitutes a hindrance to the correct reading of the light beam by the optical reader, since such a panel can on one hand be subjected to damage from the passing screws and on the other hand can easily become dirty, whereas the open gap allows rapid cleaning even with a simple jet of compressed air.
  • the concave chute 26, with the reading means rigidly associated therewith, is supported by a translatory motion unit 39 which, by means of a step motor 40, allows to move it in a vertical direction and thus to move the chute toward the section 3 or away from it, according to the length of the parts to be checked.
  • a guide 37 guides the chute 26 in its vertical motion.
  • the operation of the stem checking section is as follows; the screw 25, after being deposited on the chute 26, slides downward until it reaches the photocells 32, which activate the lighting unit 29 and the detector 30; in this manner, through the gap 27, the stem of the screw is inspected and its image is detected by the optical detector 30, which collects the information related to the screw 25.
  • the photocell 33 completes the reading cycle of the optical detector 30.
  • the selective discharge means 5 comprise, downstream of the chute 26, an automatic selector 34 for directing the screws either into the reject channel 35 or into the channel 36 for components complying with the specifications.
  • the angular motion of the selector 34 is controlled by the checking sections 3 and 4.
  • the device according to the invention causes the selector 34 to always discharge any screw into the rejects in case of malfunction at one of the checking sections 3 and/or 4, i.e. if one of the two stations is inoperative.
  • the optical detectors 7 and 30 are constituted by a television camera, whereas the lighting units 6 and 29 comprise a lamp, whereas the optical reader 8 comprises a photocell with an amplifier.
  • a plurality of parameters related to each screw is obtained from the readings made by the optical detectors 7, 8 and 30 by means of an electronic control system which is not illustrated, and said parameters are compared to the preset standards for that production batch and for the particular product manufactured.
  • the invention achieves the intended aim and objects, providing a device which is capable of inspecting a large number of screws and/or bolts in a short time, thus allowing an exhaustive and not statistical control of the production batch.
  • the materials employed, as well as the dimensions, may be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Connection Of Plates (AREA)
  • Automatic Assembly (AREA)
  • Feeding Of Workpieces (AREA)
  • Feeding Of Articles To Conveyors (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Sorting Of Articles (AREA)
EP19910119943 1990-11-26 1991-11-22 Quality control device particularly for screws, bolts and the like Withdrawn EP0488075A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2218990 1990-11-26
IT02218990A IT1245300B (it) 1990-11-26 1990-11-26 Dispositivo per il controllo di qualita' particolarmente per viti, bulloni e simili

Publications (2)

Publication Number Publication Date
EP0488075A2 true EP0488075A2 (de) 1992-06-03
EP0488075A3 EP0488075A3 (en) 1992-12-02

Family

ID=11192808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910119943 Withdrawn EP0488075A3 (en) 1990-11-26 1991-11-22 Quality control device particularly for screws, bolts and the like

Country Status (3)

Country Link
EP (1) EP0488075A3 (de)
JP (1) JPH0531644A (de)
IT (1) IT1245300B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108568664A (zh) * 2017-03-11 2018-09-25 中山市川上智能设备有限公司 一种锁舌组件装配机及其装配方法
CN110561112A (zh) * 2019-09-30 2019-12-13 中山市川上智能设备有限公司 一种锁舌组件装配机装配锁舌的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102419289B1 (ko) * 2020-07-30 2022-07-11 주식회사 넥사 다관절 로봇에 장착된 볼트 공급 시스템

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55132904A (en) * 1979-04-05 1980-10-16 Fuji Electric Co Ltd Shape inspection system
US4732296A (en) * 1985-06-14 1988-03-22 Michael Heck Track feed arrangement for an automatic screw feeding machine
JPS6239927U (de) * 1985-08-28 1987-03-10
US4841364A (en) * 1988-04-15 1989-06-20 Kawaguchi, Ltd. System for confirming the release of a molded article in an injection molding apparatus and for determining the quality of the article

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108568664A (zh) * 2017-03-11 2018-09-25 中山市川上智能设备有限公司 一种锁舌组件装配机及其装配方法
CN110561112A (zh) * 2019-09-30 2019-12-13 中山市川上智能设备有限公司 一种锁舌组件装配机装配锁舌的方法

Also Published As

Publication number Publication date
IT1245300B (it) 1994-09-19
IT9022189A1 (it) 1992-05-27
EP0488075A3 (en) 1992-12-02
IT9022189A0 (it) 1990-11-26
JPH0531644A (ja) 1993-02-09

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