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WO1986006816A1 - Systeme de securite associe a des machines de travail - Google Patents

Systeme de securite associe a des machines de travail Download PDF

Info

Publication number
WO1986006816A1
WO1986006816A1 PCT/DK1986/000052 DK8600052W WO8606816A1 WO 1986006816 A1 WO1986006816 A1 WO 1986006816A1 DK 8600052 W DK8600052 W DK 8600052W WO 8606816 A1 WO8606816 A1 WO 8606816A1
Authority
WO
WIPO (PCT)
Prior art keywords
safety system
optical
supervised area
working
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DK1986/000052
Other languages
English (en)
Inventor
Anders HO^/GSHOLM
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.)
NORTHERN FOOD-LINE MACHINES K/S
Original Assignee
NORTHERN FOOD-LINE MACHINES K/S
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 NORTHERN FOOD-LINE MACHINES K/S filed Critical NORTHERN FOOD-LINE MACHINES K/S
Publication of WO1986006816A1 publication Critical patent/WO1986006816A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B13/00—Band or strap sawing machines; Components or equipment therefor
    • B27B13/14—Braking devices specially designed for band sawing machines, e.g. acting after damage of the band saw blade
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector

Definitions

  • the invention relates to a safety system of the kind described in the introduction to claim 1.
  • the object is furthermore to provide the design of such a safety system in such a manner that it may know the difference between the product to be worked and the operator.
  • the system according to the invention can furthermore be improved by designing the optical/electrical system as disclosed in the characterising part of claim 2. It is thereby ensured that only fluorescent light of the particular frequency may pass the optical system and reach the detector.
  • the insensitiveness of the system to light and reflections from the surroundings is substantially increased if it is designed as disclosed in the characterising part of claim 3.
  • the visual field of the optical system is thereby reduced so that only a circular area around the tool is supervised and the effect of reflections from for example the operator is reduced by the matted working plane.
  • a particularly simple way to secure hands and fingers against accidents when working with cutting tools is obtained by using a working glove as disclosed in the characterising part of claim 4.
  • the operator uses a special working glove on each hand.
  • a particularly advantageous embodiment of the invention is disclosed in the characterising part of claim 5.
  • red fluorescent material so as to ensure the constant use of the detecting means for example a working glove as described above.
  • the system according to the invention By designing the system according to the invention as further disclosed in claim 6, it is possible to supervise and secure special working machines, for example a high-speed band saw for cutting foodstuffs.
  • the optical system will supervise a circular area around the saw blade and as scon as a flourescent material which can be detected by the optical/electrical system enters the circular area, the blade is instantaneously stopped so that injuries are avoided.
  • Saws of this type are some of the most dangerous tools used in the food processing industry and many injuries can be avoided by using the system according to the invention.
  • the system according to the invention may be designed as disclosed in the characterising part of claim 7.
  • the system may thus be adapted so as not to initiate a blocking or cutting if for example a glove touches the supervised area so that only a quite small section of the glove enters the area. If the glove is taken further into the supervised area, blocking or cutting is instantaneously activated.
  • This function may also be used for checking whether the system is operating correctly or not or for checking the quality of a glove with a view to safety.
  • the safety system according to the invention may be designed as disclosed in the characterising part of claim 8. It is thereby ensured partly that the system is always operational and partly that the operator will have to check the system prior to any start of the tool thus ensuring that the operator uses the correct detecting means for example the right gloves.
  • An important feature of a safety system as the one described in the application is that the operators have confidence in the system and that they are all the time reminded of the presence and function of the system in that the required procedures for starting the machine must be implemented each time the machine is to be started.
  • Fig. 1 shows a band saw with a safety system according to the invention
  • Fig. 2 shows an electrical basic circuit diagram therefor.
  • Fig. 1 of the drawing shows a high-speed band saw for cutting for example deep-frozen fish or meat.
  • the invention will be further described in connection with this working machine, but it is obvious to a person skilled in the art that the safety system according to the invention may be used on almost any other working machine where there is a risk of personal injuries.
  • the band saw consists of an endless saw blade 2 extending over two wheels or rollers 3,4 where one wheel 4 is driven by a motor, for example an electric motor 5.
  • the saw blade 2 passes through an opening in a working plane 1 which may be a worktable which is either stationary or partly movable, the area in the vicinity of the blade being usually stationary.
  • a light source 7 such as a UV (ultraviolet) type flourescent tube having powerful radiation around 400-450 nm wave length lights the working plane around the saw blade.
  • a working glove 5 covered with a flourescent material for example having the colour daylight red type Beckers no. 189 which may be excited by the ultravialet light from the
  • the area around the blade 2 is supervised by an ⁇ optical/electrical system 8 comprising one or more lens systems 9, a circular mask 10, an optical band-pass filter 11, and a detector 12 such as a 1 c ⁇ r.2 silicon solar cell of a generally known type.
  • the optical/electrical system 8 supervises 5 a circular area 13,14 around the blade where the size and shape of the circular area is determined by the inserted circular mask 10 in the optical system.
  • the apparatus moreover has a warning horn 17 or any other type of optical or acoustic warning means and a schematically shown blocking or cutting means 16. It is obvious that it is possible to use several blocking or cutting means 16 for example a means 5 under the plane 1 (as shown) and a means (not shown) a distance over the plane so that at least the length of blade which may injure the operator may be retained if the safety system is activated.
  • the UV-lamp 7 receives current from a supply source 21 having an alternating voltage between 1-50 kHz so that the UV-light is modulated with a fixed frequency" controlled by a circuit 22 determining the modulation frequency.
  • the working plane 1 is thus lighted with modulated UV light around 400-450 nm.
  • A-F in Figs. 1 and 2 indicate how the electrical circuit in Fig. 2 is connected to the apparatus shown in Fig. 1 where A in Fig. 2 is connected to A in Fig. 1, B in Fig. 2 is connected to B in Fig. 1 etc.
  • the detector 12 in Fig. 1 is connected to the entry point of the circuit 18 in Fig. 2 comprising amplifier circuits and electrical filters partly so that noise is shut out and partly so that only electrical signals with a frequency substantially corresponding to the modulation frequency will reach the detecting and level determining circuit 19.
  • the detecting and level determining circuit 19 controlled by the synchronisation circuit 22 it is determined whether the detector 12 has received excited light from the flourescent material of the glove 15. Light having other wave lengths will already to a large extent have been filtered off by the band-pass filter 11.
  • a logical circuit 20 receives the signals from the detecting and level determining circuit 19.
  • the logical circuit 20 checks whether the UV-light source is on in that a signal to this effect is received from the supply current 21 and moreover checks whether the motor 5 is running or is stopped. From the logical circuit 20 signals are sent to the blocking or cutting means 16 at outlet D, signals for stopping the drive motor 5 at outlet E, and signals for the warning horn 17 at outlet F. Additionally, it is possible from the logical circuit to control a lamp signal board 23 with a lamp 24 indicating whether the UV-lamp 7 is on, with a lamp 25 indicating whether the system has been -tested or not, with a lamp 26 indicating whether the motor is running and with a lamp 27 indicating whether the entire apparatus is connected to the mains or not.
  • the safety system When for example the working glove 15 is taken into the supervised area, which for the sake of clarity is shown as two circular areas 13 and 14, the glove will first enter the area marked 13. When for example -5-lcm.2 of the glove is within the supervised area, the safety system will immediately react thereto and activate the signal means 17 warning the operator that a very dangerous situation is about to arise. If the glove is then immediately removed from the area, it is possible to continue working with the band saw as hitherto, but if the glove is taken further into the supervised area in such a manner that for example more than 1 cm-*-*, for instance 2 cm-*--, of the glove is within the supervised area, the safety system will immediately react by instantaneously activating -the blocking or cutting means 16.
  • the system is adapted in such a manner that the time of reaction is less than 1 msec for 2 cm.2 flourescent material in the supervised area.
  • the logical circuit 20 is moreover adapted in such a manner that the motor 5 of the band saw cannot be started before a glove 15 with flourescent material of the correct type has been placed within the supervised area and then removed therefrom. This will ensure that it is not possible to start working with the machine without the operator having remembered to put on protective gloves.
  • the electrical circuit shown in Fig. 2 of the drawing may be designed in many different ways using generally known techniques.
  • the electrical circuit may be designed either by analog or digital techniques by putting together known components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

Un système de sécurité, par exemple pour une scie à ruban (2, 3, 4) entraînée par un moteur (5) sur un plan de travail (1), est éclairé par un dispositif d'éclairage (6, 7) avec de la lumière UV modulée. Lorsqu'un gant (15) en matériau fluorescent pénètre dans la zone surveillée (13, 14), un système optique (8) détecte la lumière fluorescente excitée sur le gant et actionne un dispositif de signalisation (17) et un ou plusieurs dispositifs de blocage ou d'interruption (16).
PCT/DK1986/000052 1985-05-15 1986-05-12 Systeme de securite associe a des machines de travail Ceased WO1986006816A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK2153/85 1985-05-15
DK215385A DK215385D0 (da) 1985-05-15 1985-05-15 Sikkerhedssystem til anvendelse i forbindelse med arbejdsmaskiner

Publications (1)

Publication Number Publication Date
WO1986006816A1 true WO1986006816A1 (fr) 1986-11-20

Family

ID=8110430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1986/000052 Ceased WO1986006816A1 (fr) 1985-05-15 1986-05-12 Systeme de securite associe a des machines de travail

Country Status (4)

Country Link
EP (1) EP0222847A1 (fr)
AU (1) AU5901186A (fr)
DK (1) DK215385D0 (fr)
WO (1) WO1986006816A1 (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206662A (en) * 1987-07-08 1989-01-11 Truro School A safety system for machinery having exposed moving parts
FR2673265A1 (fr) * 1991-02-21 1992-08-28 Townsend Engineering Co Moyen de securite pour machines a moteur, en particulier pour machines a depouiller la viande.
EP0544239A3 (fr) * 1991-11-25 1993-06-16 Michael Kalkoffen Dispositif pour la protection d'une zone de travail définie
EP0600841A1 (fr) * 1992-12-04 1994-06-08 STEINEX S.r.l. Appareil de contrôle pour la prévention d'accident sur presses hydrauliques et similaires, en particulier pour travaux de broyage de pierres
US5501947A (en) * 1990-07-19 1996-03-26 Royal Free Hospital School Of Medicine PCR diagnosis of human papilloma virus type 16
EP0716907A1 (fr) * 1994-12-16 1996-06-19 Posch Gesellschaft m.b.H. Dispositif de protection pour machines à outil mobile pour fendre le bois
EP0793208A3 (fr) * 1996-03-01 1998-06-17 Mitsubishi Cable Industries, Ltd. Dispositif de sécurité pour une machine à pétrir utilisant des rouleaux
FR2846729A1 (fr) * 2002-11-04 2004-05-07 Manulatex France Dispositif de protection et de securite programmable pour outils motorises
WO2008042838A3 (fr) * 2006-10-03 2008-05-22 Stork Townsend Inc Procédé et moyen de contrôle de l'actionnement d'une machine sur la base du port d'un capteur par un opérateur de machine
EP1909588A4 (fr) * 2005-07-18 2009-08-26 Bladestop Pty Ltd Scie électrique avec système de protection d'opérateur
DE102009014574A1 (de) * 2009-03-24 2010-10-07 Leuze Electronic Gmbh & Co Kg Sicherheitssystem
US20160008997A1 (en) * 1999-10-01 2016-01-14 Sd3, Llc Table saws
WO2016049690A1 (fr) * 2014-09-29 2016-04-07 Bladestop Pty Limited Système de protection d'opérateur pour scie électrique
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
US9927796B2 (en) 2001-05-17 2018-03-27 Sawstop Holding Llc Band saw with improved safety system
CN109923343A (zh) * 2016-08-18 2019-06-21 安全切割有限公司 电带锯设备
EP2913168B1 (fr) 2007-10-22 2019-12-04 Formax, Inc. Machine de tranchage d'article alimentaire comprenant un système de protection de sécurité
US10603808B2 (en) 2014-08-26 2020-03-31 Kando Innovation Limited Productivity enhancement for band saw
NL2022474B1 (en) * 2019-01-30 2020-08-18 Rolloos Holding B V Detection system and method
EP4279792A1 (fr) * 2022-05-18 2023-11-22 Leuze electronic GmbH + Co. KG Rideau lumineux

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5847496A (en) * 1995-05-24 1996-12-11 New Zealand Logging Industry Research Association Incorporated, The Improvements in safety equipment for motor driven saws

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888570A (en) * 1955-04-26 1959-05-26 Ohio Commw Eng Co Apparatus for controlling machines and processes
US3109094A (en) * 1960-07-29 1963-10-29 Neil A Marshall Safety device for industrial machines comprising fluorescence detection apparatus
FI57015B (fi) * 1978-06-19 1980-01-31 Harri Olavi Vaarala Saekerhetsanordning som ansluter sig till en aktiveringsanordning foer arbetsslaget i en arbetsmaskin eller dess arbetsorgan
DE3025841A1 (de) * 1980-07-08 1982-02-18 Helmut Dipl.-Chem. 8000 München Ulrich Detektorschaltung mit kapazitivem fuehlerelement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888570A (en) * 1955-04-26 1959-05-26 Ohio Commw Eng Co Apparatus for controlling machines and processes
US3109094A (en) * 1960-07-29 1963-10-29 Neil A Marshall Safety device for industrial machines comprising fluorescence detection apparatus
FI57015B (fi) * 1978-06-19 1980-01-31 Harri Olavi Vaarala Saekerhetsanordning som ansluter sig till en aktiveringsanordning foer arbetsslaget i en arbetsmaskin eller dess arbetsorgan
DE3025841A1 (de) * 1980-07-08 1982-02-18 Helmut Dipl.-Chem. 8000 München Ulrich Detektorschaltung mit kapazitivem fuehlerelement

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206662A (en) * 1987-07-08 1989-01-11 Truro School A safety system for machinery having exposed moving parts
US5501947A (en) * 1990-07-19 1996-03-26 Royal Free Hospital School Of Medicine PCR diagnosis of human papilloma virus type 16
FR2673265A1 (fr) * 1991-02-21 1992-08-28 Townsend Engineering Co Moyen de securite pour machines a moteur, en particulier pour machines a depouiller la viande.
NL9100650A (nl) * 1991-02-21 1992-09-16 Townsend Engineering Co Veiligheidsinrichting voor electrisch aangedreven machines.
EP0544239A3 (fr) * 1991-11-25 1993-06-16 Michael Kalkoffen Dispositif pour la protection d'une zone de travail définie
EP0600841A1 (fr) * 1992-12-04 1994-06-08 STEINEX S.r.l. Appareil de contrôle pour la prévention d'accident sur presses hydrauliques et similaires, en particulier pour travaux de broyage de pierres
EP0716907A1 (fr) * 1994-12-16 1996-06-19 Posch Gesellschaft m.b.H. Dispositif de protection pour machines à outil mobile pour fendre le bois
EP0793208A3 (fr) * 1996-03-01 1998-06-17 Mitsubishi Cable Industries, Ltd. Dispositif de sécurité pour une machine à pétrir utilisant des rouleaux
US5921367A (en) * 1996-03-01 1999-07-13 Mitsubishi Cable Industries, Ltd. Safety device for a kneading machine using rolls
US20160008997A1 (en) * 1999-10-01 2016-01-14 Sd3, Llc Table saws
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
US10335972B2 (en) 1999-10-01 2019-07-02 Sawstop Holding Llc Table Saws
US9925683B2 (en) * 1999-10-01 2018-03-27 Sawstop Holding Llc Table saws
US9927796B2 (en) 2001-05-17 2018-03-27 Sawstop Holding Llc Band saw with improved safety system
FR2846729A1 (fr) * 2002-11-04 2004-05-07 Manulatex France Dispositif de protection et de securite programmable pour outils motorises
EP1909588A4 (fr) * 2005-07-18 2009-08-26 Bladestop Pty Ltd Scie électrique avec système de protection d'opérateur
WO2008042838A3 (fr) * 2006-10-03 2008-05-22 Stork Townsend Inc Procédé et moyen de contrôle de l'actionnement d'une machine sur la base du port d'un capteur par un opérateur de machine
US7663492B2 (en) 2006-10-03 2010-02-16 Stork Townsend Inc. Method and means for controlling the operation of a machine based upon the wearing of a sensor by a machine operator
EP2913168B2 (fr) † 2007-10-22 2024-06-05 Formax, Inc. Machine de tranchage d'article alimentaire comprenant un système de protection de sécurité
EP2913168B1 (fr) 2007-10-22 2019-12-04 Formax, Inc. Machine de tranchage d'article alimentaire comprenant un système de protection de sécurité
EP2233818A3 (fr) * 2009-03-24 2012-09-19 Leuze electronic GmbH + Co. KG Système de sécurité
DE102009014574B4 (de) * 2009-03-24 2018-02-22 Leuze Electronic Gmbh & Co. Kg Sicherheitssystem
DE102009014574A1 (de) * 2009-03-24 2010-10-07 Leuze Electronic Gmbh & Co Kg Sicherheitssystem
US10603808B2 (en) 2014-08-26 2020-03-31 Kando Innovation Limited Productivity enhancement for band saw
AU2019100165B4 (en) * 2014-09-29 2019-08-01 Scott Automation & Robotics Pty Ltd Operator protection system for electric saw
WO2016049690A1 (fr) * 2014-09-29 2016-04-07 Bladestop Pty Limited Système de protection d'opérateur pour scie électrique
US10697587B2 (en) 2014-09-29 2020-06-30 Scott Automation & Robotics Pty Ltd. Operator protection system for electric saw
CN109923343A (zh) * 2016-08-18 2019-06-21 安全切割有限公司 电带锯设备
NL2022474B1 (en) * 2019-01-30 2020-08-18 Rolloos Holding B V Detection system and method
EP4279792A1 (fr) * 2022-05-18 2023-11-22 Leuze electronic GmbH + Co. KG Rideau lumineux

Also Published As

Publication number Publication date
DK215385D0 (da) 1985-05-15
AU5901186A (en) 1986-12-04
EP0222847A1 (fr) 1987-05-27

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