EP3345682B1 - Alarmsystem, anordnung, die eine sprühvorrichtung und ein solches alarmsystem umfasst, und pneumatisches sprühverfahren - Google Patents

Alarmsystem, anordnung, die eine sprühvorrichtung und ein solches alarmsystem umfasst, und pneumatisches sprühverfahren Download PDF

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Publication number
EP3345682B1
EP3345682B1 EP18150750.0A EP18150750A EP3345682B1 EP 3345682 B1 EP3345682 B1 EP 3345682B1 EP 18150750 A EP18150750 A EP 18150750A EP 3345682 B1 EP3345682 B1 EP 3345682B1
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EP
European Patent Office
Prior art keywords
spraying
spraying device
spray
sensor
assembly according
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Application number
EP18150750.0A
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English (en)
French (fr)
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EP3345682A1 (de
Inventor
Nicolas PLANTARD
Nicolas Ferrere
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Exel Industries SA
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Exel Industries SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
    • B05B12/122—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to presence or shape of target
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
    • B05B12/124—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to distance between spray apparatus and target
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
    • B05B12/126—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus responsive to target velocity, e.g. to relative velocity between spray apparatus and target
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B05B15/18—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for improving resistance to wear, e.g. inserts or coatings; for indicating wear; for handling or replacing worn parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B05B7/1245—A gas valve being opened before a liquid valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device

Definitions

  • the invention relates to an alarm system for a spray device, in particular for a gun designed to be handled by a user.
  • This type of gun comprises a sensor for measuring the spraying distance and a nozzle, the opening of which is selectively controlled by the movement of a needle.
  • the distance sensor triggers the opening and closing of the needle automatically according to the distance between the gun and the part to be coated.
  • the user then only has to point the gun in the direction of the part to be coated.
  • a disadvantage of this 100% automatic mode is that the gun can continue to spray uncontrollably. In fact, if the painter places the gun on the ground, for example near a wall, then the gun can turn on and spray product on the wall, which is obviously not desirable. This type of gun is therefore not suitable for beginner painters.
  • Some guns are equipped with means for measuring the angle of the spray with respect to the surface of the object to be coated and with a valve which automatically adjusts the flow of coating product according to the inclination of the gun relative to the surface to be coated.
  • the flow rate is increased.
  • the flow rate is reduced when there is a fault in perpendicularity.
  • the flow rate is also adjusted according to several parameters, such as the surface condition, the temperature, the speed of the gun relative to the object, the geometry of the surface, etc.
  • certain spray guns commonly referred to as AIRMIX (registered trademark) paint guns
  • AIRMIX registered trademark
  • paint guns include a spray air injection system.
  • This system comprises air ejection holes and the high pressure jets issuing from these holes impact the jet of coating product at the nozzle outlet, so as to form a homogeneous atomized spray in the form of droplets.
  • the product injection system and the atomizing air injection system are opened sequentially when the user presses the trigger: the air injection system is activated first and the product injection system is activated second. We therefore have a trigger with double actuation.
  • the invention proposes an alarm system to facilitate the use of a spray device and therefore to make the device usable even by novice painters.
  • the invention relates to an assembly comprising: a spray device, comprising a spray nozzle for spraying a coating product on a part, and an alarm system, designed to send an alarm signal to a user equipped of the spraying device when the spraying distance is less than a minimum value or greater than a maximum value and / or when there is a lack of perpendicularity between a spray axis of the device and a surface to be coated facing the spraying device , the alarm system comprising at least one means for measuring a spraying distance with a surface to be coated positioned facing the spraying device and / or means for detecting a defect in perpendicularity between the spray axis and the surface to be coated.
  • the spraying device is configured to spray only when the spraying distance is between the minimum value and the maximum value and / or only when the angle between the spray axis of the device and the surface to be coated placed facing the spraying device. spraying is between the minimum value and the maximum value. According to the invention, the spray device is configured to spray only when the user exerts a particular action on the device, which is different from that consisting of pressing a trigger.
  • the user of the device can be alerted when he is too close or too far from the object.
  • he does not have to gauge the distance at which he is from the object to be coated and to assess whether this distance conforms or not to the manufacturer's recommendations.
  • the user can also be alerted when he does not hold the device correctly, that is to say when there is a significant lack of perpendicularity between the spray axis of the gun and the surface to be coated. Thanks to this system, even amateur painters or beginners, who generally have difficulty in estimate the spraying distance and properly hold the spray device, can use the spray device.
  • the air injection system is always open before the product injection system, which makes it possible to avoid the transient phase during which the spray is not completely stabilized.
  • the spraying device comprises means for electrostatically charging the coating product, which is activated before or during step a) and which is deactivated during or after step d).
  • the means for electrostatically charging the coating product is activated manually, for example during the operation of a control element of the spraying device.
  • the coating product may comprise one or more compounds. It can be in fluid or powder form. It is for example a paint, a varnish, a primer, a lubricant, a solvent, etc ...
  • the spraying device 2 is supplied with coating product via a conduit 20 and with compressed air via two conduits 22, only one of which is shown in the figures.
  • the conduits 20 and 22 are in the example connected to a fixed power supply unit 7.
  • the supply unit 7 can be a mobile device, such as a cart or a device carried by the user.
  • the spray device 2 comprises a pistol 21.
  • the pistol 21 comprises a gripping stock 24 to be gripped with the hand and a gun body 25 integral with the upper part of the stock 24.
  • the body 25 of the gun comprises two connectors elbows 28 for the compressed air supply and a connector 26 for the coating product supply.
  • a spray nozzle 34 is attached to the body 25. This nozzle 34 defines a spray axis X2 along which the product jet is sprayed in operating condition.
  • the spraying device 2 comprises at least one means for measuring the spraying distance, preferably means for measuring the spraying distance.
  • the spray distance is the distance between the device 1 and the object to be coated 3, which is positioned opposite the device 1, that is to say in the spray field of the device 1.
  • the spray distance is measured in parallel to the spray axis X2.
  • the measuring means comprise an ultrasonic sensor 30, preferably two ultrasonic sensors 30 and 32.
  • Each of the ultrasonic sensors 30 and 32 is mounted on the body 25 of the gun 21 and is configured to emit waves. sound in a direction parallel to the spray axis X2.
  • the time with which the sound wave is reflected on the part is representative of the distance between the device and the part, that is to say the spray distance.
  • the measuring means are connected to a computer (not shown) programmed to compare the distance values measured by the sensors 30 and 32 with a minimum value and a maximum value.
  • the minimum value and the maximum value define a good range of distance, in which the operator must be while using the device 2.
  • the minimum and maximum values are pre-stored in a memory. They can be programmed by the user. Typically, the minimum value is greater than or equal to 10 cm, in particular equal to 15 cm, and the maximum value is less than or equal to 60 cm, in particular equal to 40 cm.
  • the spraying device 2 comprises an alarm system, designed to alert the operator 1 when the spraying distance is less than a minimum value or greater than a maximum value.
  • the alarm system is triggered by the computer, depending on the result of the comparison of the spray distance with the minimum value and the maximum value.
  • the distance with which the minimum value and the maximum value are compared is for example the average of the two distances, respectively d1 and d2, measured by the sensors 30 and 32. It can also be, as a variant, the minimum distance or the maximum distance among the distances d1 and d2.
  • the alarm system is on board the spray device 2, that is to say integrated into the device.
  • the alarm system comprises a vibrator 36 (shown schematically) integrated into the stick 24. This vibrator 36 vibrates when the spraying distance is less than the minimum value and when the spraying distance is greater than the maximum value, that is, when the operator is not in the correct distance range.
  • the vibrator 36 can be configured to vibrate all the more as the device 1 moves away from the correct distance range.
  • the spraying device 2 advantageously comprises a dead man system, configured to interrupt spraying when the user is inactive.
  • the man-dead system comprises a control element 50 which is a push button, ergonomically arranged in the upper part of the stick 24, near the index of the operator 1 when the latter grips the stick 24.
  • a dead man system also called “automatic standby”
  • automatic standby is a system allowing the automatic triggering of an action in the event of absence of movements or in the event of release by the operator. .
  • spraying is interrupted.
  • the button 50 On the other hand, if the operator presses the button 50, then the product is sprayed.
  • the spray device 1 comprises a movable needle (not shown) for closing the nozzle 34 and a closure system, configured to cause the movement of the needle between an open position and a closed position, and vice versa.
  • the closing system can include an electromagnetic pad, a solenoid electromagnet or a pneumatic solenoid valve which controls the arrival of the compressed air used to actuate the movement of the needle.
  • a return spring can be provided to ensure the closure of the needle in the event of an electrical failure.
  • the spraying device 1 incorporates an electronic unit (not shown) for controlling the closing system.
  • the electronic control unit is programmed to control the movement of the needle in the closed position when the control element 50 is not actuated.
  • the embodiment shown in the figures therefore corresponds to a 100% manual mode: the opening of the nozzle is controlled directly by the control element 50.
  • the computer and the electronic control unit are a single processor.
  • the electronic control unit is connected to a sensor (not shown) associated with the button 50.
  • This sensor is intended to detect the actuation and release of the button 50 and to transmit the information to the button.
  • the sensor can generate a signal of the binary type, which takes the value "1" when the button 50 is pressed and the value "0" when the button 50 is released.
  • the spray device 2 is a device without a trigger.
  • an actuating trigger is an articulated part which is generally manipulated with the last four fingers of the hand to mechanically control the opening of the needle.
  • a trigger makes it possible to adjust the flow of product sprayed in a manner proportional to the degree of actuation.
  • the needle and the trigger are mechanically linked to each other.
  • the button 50 is not mechanically linked to the needle because the movement of the needle is electronically controlled. Additionally, the button 50 does not allow the user to adjust the spray rate. In other words, it is not a proportional effect button, but an ON / OFF button. With element 50, the physical effort that the operator must provide to open the needle is much less than that which he must provide with a trigger, so that the risk of the appearance of musculoskeletal disorders (MSD) after repeated use is limited.
  • MSD musculoskeletal disorders
  • the spraying device 2 is voice-controlled.
  • the spray device does not include a push button or other manual control element for activating the spray.
  • the activation and stopping of the spraying are controlled by spoken instructions to be given.
  • the spraying device 2 preferably comprises a microphone, to pick up any voice command instructions.
  • typical instructions can be stored in memory, either in an internal memory of the device 2, or on a network hard disk with which the device can communicate.
  • voice-activated instructions could be: "activate spraying" and "stop spraying".
  • the spraying device 2 advantageously comprises means for detecting a defect in perpendicularity between the spraying axis X2 and the surface to be coated.
  • the detection means comprise a member for measuring the orientation of the device 2 along one, two or three axes, in particular a gyroscope 38 (shown schematically on figure 2 ).
  • the detection means also include the two ultrasonic sensors 30 and 32.
  • the gyroscope 38 is a gyroscope of the unidirectional type, configured to measure the inclination of the device around an axis, in particular around a horizontal axis Y0, which is perpendicular to the spray axis X2 when the device 2 is held upright. , i.e. in the configuration of the figure 1 for example.
  • the gyroscope 38 therefore makes it possible to evaluate the inclination of the spray axis X2 of the device 2 with respect to the horizontal.
  • the two ultrasonic sensors 30 and 32 make it possible to detect a possible defect in the orientation of the spray device 2 around a vertical axis Z0, and therefore a defect in perpendicularity between the spray axis X2 and the surface to be coat S3 '.
  • a computer (not shown) compares the distance values d1 and d2 measured by the sensors 30 and 32 (see figure 4 ). The difference between the two values is representative of a perpendicularity defect.
  • the spraying device 2 therefore comprises an alarm system, designed to alert the user 1 when there is a lack of perpendicularity between the spray axis X2 and the surface to be coated S3 '.
  • the alarm system can be triggered when the inclination of the device 2 around the axis Y0 of the inertial reference frame exceeds a threshold value, chosen for example equal to 5 ° and when the difference between the distances d1 and d2 exceeds a predefined percentage, for example equal to 10%.
  • the alarm system is preferably the same as that used to signal bad spray distance. It is therefore also the vibrator 36.
  • the triggering of the alarm system is controlled by a computer, in particular the same computer as that used to control the alarm system which is triggered to signal a bad spray distance.
  • the means for measuring the spraying distance comprise, instead of the ultrasonic sensor (s), a distance sensor, such as an accelerometer coupled to a gyroscope, also called an accelerometer gyroscope.
  • the accelerometer gyroscope is integrated into the device 1 and makes it possible to measure the acceleration of the device 1 in at least one direction, for example in the direction parallel to the spray axis X2.
  • the accelerometer is a triaxial accelerometer.
  • a computer integrated into the device 1 is associated with the accelerometer to calculate the displacement of the device 1, from a starting point, along 1, 2 or 3 axes by double integration over time.
  • the starting point is a point chosen arbitrarily on the surface to be coated, such as the point P0 represented in figure 1 .
  • the starting point can be a point chosen arbitrarily on a reference external to the part to be coated.
  • the operator performs a calibration step prior to spraying. This step aims to calibrate the accelerometer by positioning the device 1 as close as possible to the surface to be coated in order to set the starting point, and therefore to set the spray distance to zero.
  • the device may include a button (not shown) allowing the user to calibrate the accelerometer.
  • the processor calculates the displacement of the device in a direction X0 substantially perpendicular to the surface to be painted, which makes it possible to obtain, at any time, the position of the device 1 by relative to the object, and therefore a good approximation of the spray distance.
  • the accelerometer can be integrated into the gyroscope 38.
  • the means used make it possible to evaluate a potential orientation defect of the device 2 around at least two axes of an inertial frame.
  • the third axis relates to the rotation of the device around the spray axis X2, a measurement of the inclination of the device around this axis is not really necessary.
  • a three-dimensional gyroscope measures the orientation of the spray device 2 around three axes X0, Y0 and Z0 of a Cartesian inertial frame of reference.
  • the gyroscope includes its own frame of reference, defined by the axes X1, Y1 and Z1 perpendicular two by two (mobile Cartesian frame of reference) and gives the angular position of its frame of reference with respect to the inertial frame of reference.
  • the spraying device 2 comprises a system indicating the orientation of the device with respect to an inertial frame of reference.
  • the indicator system can be provided in the form of a display screen, displaying in real time the inclination values of the device along one, two or three axes. The user can then correct any orientation fault by consulting the display screen.
  • the indicator system is formed by several LEDs arranged perpendicular to the spray axis, in particular aligned in a direction parallel to the Z1 axis, so as to indicate the orientation of the device 2 around the Y1 axis with respect to the surface to be coated. Only one of these LEDs is then on, depending on the orientation of the gun around the Y1 axis relative to the surface to be coated. When it is the LED in the middle of the row that is lit, it means that the spray axis X2 is generally perpendicular to the surface to be coated. On the other hand, the other LEDs are on when the user aims too high, or too low, in relation to the shape of the surface to be coated.
  • a row of LEDs can also be provided in the direction parallel to the Y1 axis, as a system indicating the orientation of the device 2 around the Z1 axis.
  • the LEDs can also be arranged in an arc.
  • the indicator system is therefore configured to allow a user to estimate the orientation of the device 2, along one, two or three axes, with respect to a minimum degree of orientation and a maximum degree of orientation.
  • the minimum degree of orientation and the maximum degree of orientation are angles measured with respect to the normal of the surface to be coated. Thanks to this system, the user can locate himself in relation to the orientation values not to be exceeded and thus orient the device 2 in an optimal way, trying to orient the device in the middle of the stroke between the degree of orientation minimum and the maximum degree of orientation.
  • the spray axis is perpendicular to the surface to be coated.
  • the electronic control unit of the nozzle closing system 34 is programmed to automatically move the needle to the closed position when the spraying distance is less than a threshold limit less than or equal to the minimum value. of 10 cm and / or when the spraying distance is greater than a threshold limit greater than or equal to the maximum value of 60 cm.
  • a threshold limit less than or equal to the minimum value. of 10 cm and / or when the spraying distance is greater than a threshold limit greater than or equal to the maximum value of 60 cm.
  • the means for measuring the spraying distance are connected to the electronic control unit so as to be able to transmit measurement information, in particular the value of the spraying distance.
  • the electronic control unit of the nozzle closing system 34 is programmed to automatically move the needle to the closed position when the angle of inclination of the device 2 around the axis Y0 is greater. to a predetermined value, greater than or equal to the threshold value (of 5 ° in the example) and when the difference between the values d1 and d2 exceeds a certain percentage, greater than or equal to 10% for example
  • the means for detecting a perpendicularity defect are connected to the electronic control unit so as to be able to transmit measurement information, in particular the inclination values.
  • the spraying device 2 is a device of the semi-automatic type.
  • the device 2 then simply comprises a safety element, provided to oppose the spraying of the coating product as long as the device is not held in the hand by a user.
  • this safety element can be a notch or a button, operable between a locked position, in which it opposes the spraying of the coating product and an unlocked position, in which the coating product can be sprayed automatically when an object is detected in front of the device, that is to say in the spray field of the device.
  • the “dead man” system is formed by a gripping sensor, capable of detecting when the spraying device 2 is taken over by a user.
  • This gripping sensor can be a capacitive sensor, an optical sensor or even a thermal sensor.
  • the thermal sensor is integrated into the grip handle 24 and detects the human heat applied to the grip 24 when the user takes hold of the device 2.
  • the grip sensor is capable of transmitting a signal to the grip.
  • This signal is preferably of the binary type and then comprises two states: “0” when the device 2 is not taken in hand and “1” when the gripping sensor detects a grip of the device 2.
  • the "dead man” control element is configured to stop spraying when the user releases the device 2, that is to say releases the stick 24.
  • the spraying device 2 comprises an indicator system, to inform the user of the spraying distance.
  • This indicator system may be a display system, such as a screen, for displaying the spray distance in real time. This screen can also display the minimum and maximum distance values to be observed when coating a part. The user then has all the indications within sight to spray the product at a good distance.
  • the indicator system comprises several LEDs, for example 5 LEDs, aligned in the direction of the spray axis. An LED is then lit depending on the spraying distance.
  • the third LED (middle LED) could be on when the user is approximately in the middle of the recommended distance range.
  • the indicator system is therefore configured to allow a user to estimate the spraying distance with respect to the minimum value and with respect to the recommended maximum value.
  • the indicator system can be offset relative to the spraying device 2.
  • the indicator system is a display screen
  • the latter can be installed against a wall of a spray booth. spraying (not shown).
  • the alarm system comprises, in place of the vibrator 36 or in addition, a visual indicator, comprising at least one LED and / or an audible indicator, of the “beep” or “buzzer” type.
  • the LED can be designed to flash with a frequency that increases as the operator moves away from and / or approaches the correct distance range or as the angle of inclination of the device relative to one of the axes of the inertial frame of reference increases.
  • the intensity and / or the frequency of the “beep” can be designed to increase the further the operator moves away from the correct distance range or the greater the defect of perpendicularity.
  • the visual indicator can comprise several LEDs, for example three LEDs of different colors (1 green LED, 1 orange LED and 1 red LED), or one LED of variable color.
  • the green color can be used to indicate that the perpendicularity is correct or that the user is in the correct distance range
  • the orange color can be used to indicate a slight defect in perpendicularity or that the user has reached the terminals. (lower and upper) of the recommended distance range
  • the red color can be used to indicate a severe perpendicularity defect or that the spray distance is not within the recommended distance range.
  • the rows of LEDs can be formed by RGB lighting, comprising an LED strip, an RGB controller, and a specific light source.
  • the spraying device 2 comprises a speed sensor, such as an accelerometer, for estimating the speed with which the device is moved relative to a fixed mark.
  • a speed sensor such as an accelerometer
  • the accelerometer is designed to measure, by integration with respect to time, the speed of the device in a direction perpendicular to the spray axis (one-dimensional accelerometer), preferably in two or three directions perpendicular two by two (two-dimensional or three-dimensional accelerometer ).
  • an alarm system as described above is triggered when the operator moves the device 2 too quickly, that is to say at a speed greater than the speed recommended by the operator. builder.
  • Product spraying can also be interrupted.
  • the electronic control unit of the nozzle closure system is connected to the speed sensor, to compare the speed value (s) measured by the sensor with a value pre-recorded in memory, in accordance with the manufacturer's recommendations.
  • this value can be configured.
  • the device 2 comprises a system for counting the number of opening and closing sequences of the nozzle 34, that is to say the number of times the operator has pressed the button. 50 for a 100% manual sprayer.
  • the device 2 can also comprise a means of communication with a computer system, for example with a computer.
  • This means of communication can be a radio antenna, an RFID transmitter / receiver also called “RFID transceiver” in English, an NFC chip, a Wi-Fi antenna, etc.
  • Information relating to the number of opening and opening sequences. closure of the nozzle 34 can then be transmitted to the computer system, which can in particular make it possible to estimate the wear of the seals of the device 2 and to program a preventive maintenance operation.
  • This information can also be communicated to the user through a display system, such as a screen, if the device is so equipped. Also, device 2 can transmit to the system computerized, instantaneous or deferred, information relating to spraying times. Based on this information and the coating product flow rate from device 2, the system can then calculate the amount of coating product sprayed and the amount of coating product remaining in the feed box 7.
  • the alarm system is separate from the spraying device 2 and is offset relative to the latter. It can for example be formed by a “buzzer” or a luminous beacon arranged inside the spray booth.
  • the on-board computer on the spraying device 2 communicates with the alarm system via a wireless transmission system (radio, Wi-Fi, etc.).
  • the means for measuring the spraying distance and the means for detecting a perpendicularity defect are integrated into the gun during manufacture.
  • these means could be integrated into the alarm system, which would be removable from the gun.
  • the alarm system would then take the form of an accessory that would be selectively connected to a port of the gun.
  • the spraying device 2 makes it possible to implement a pneumatic spraying method in accordance with the invention.
  • Ultrasonic sensors 30 and 32 are proximity sensors, which each have a detection cone, C1 and C2 respectively.
  • the sensors 30 and 32 are arranged such that the detection field of one is partly contained in the detection field of the other. This means that there is an area of overlap, ie an area covered by both sensors at the same time.
  • the sensors 30 and 32 are ultrasonic sensors, so that their detection field is formed by a cone, which is why we speak of a detection cone.
  • the spraying device 2 comprises an injection system for a coating product and an injection system for spraying air, comprising in particular the air inlets 22 and valves for closing the conduits 22 (not shown).
  • the product injection system advantageously comprises the nozzle 34 and a nozzle closing needle (not shown).
  • the atomizing air makes it possible to atomize the product in the form of a spray, that is to say in fine droplets. This is the principle of pneumatic spraying.
  • the sensor 32 When the user moves the device 2 horizontally from left to right, the sensor 32 begins to detect the presence of an object 3 'in its detection field. This presence detection causes the spraying air injection system to open: the system valves open and device 2 blows air. The object 3 'is then detected by the sensor 30, which causes the opening of the product injection system. There is therefore a delay between the opening of the air injection system and the opening of the product injection system. This time delay makes it possible to avoid the transitional period during which the product jet is not stabilized.
  • the sensors 30 and 32 send signals to an electronic control unit, able to control the opening and closing of the product injection system and of the air injection system.
  • signals are advantageously of the analog and / or digital type.
  • the device 2 comprises two proximity sensors offset with respect to one another in a horizontal plane and along an axis perpendicular to the spray axis when the device 2 is taken in hand.
  • the two sensors could be offset perpendicularly, that is to say along a vertical axis when the device 2 is taken in hand.
  • the two sensors 30 and 32 could be integrated with one another.
  • a first of the two sensors has a wider detection field than the second sensor.
  • the detection cone of the first sensor may have a half-angle of 30 ° while the detection cone of the second sensor may have a half-angle of 20 °.
  • the detection field of the second sensor is entirely contained within the detection field of the first sensor.
  • the air injection system opens when an object enters the detection field of the first sensor, that is to say the sensor with the widest detection field.
  • the product injection system then opens when the object enters the detection field of the second sensor.
  • the product injection system closes when the object leaves the detection field of the second sensor and the air injection system closes when the object leaves the detection field of the other sensor.
  • the spraying device 2 comprises a single proximity sensor, for example any one of the sensors 30 and 32.
  • the air injection system opens when an object enters the detection field of the sensor and the product injection system opens in a delayed manner relative to the air injection system.
  • the product injection system closes when the object leaves the detection field of the sensor and the air injection system closes in a timed manner with respect to the product injection system.
  • the spraying device 2 comprises means for electrostatically charging the coating product, which is activated before or during the opening of the air injection system and which is deactivated during or after the closing of the. air injection system.
  • the means for electrostatically charging the coating product is activated manually, for example during the operation of the control element 50 of the spraying device 2.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spray Control Apparatus (AREA)

Claims (15)

  1. Anordnung, umfassend:
    - eine Sprühvorrichtung (2), die eine Sprühdüse (34) zum Sprühen eines Beschichtungsstoffes auf ein Teil (3) umfasst, und
    - ein Alarmsystem, das ausgebildet ist, ein Alarmsignal an eine mit der Sprühvorrichtung (2) ausgerüstete Bedienperson zu senden, wenn die Sprühentfernung (d1, d2) kleiner ist als ein Minimalwert oder größer ist als ein Maximalwert und/oder wenn ein Fehler der Rechtwinkligkeit zwischen einer Sprühachse (X2) der Vorrichtung und einer zu beschichtenden Fläche (S3'), die der Sprühvorrichtung gegenüber angeordnet ist, auftritt, wobei das Alarmsystem mindestens ein Mittel (30, 32) zum Messen einer Sprühentfernung (d1, d2) zu einer zu beschichtenden Fläche (S3'), die der Sprühvorrichtung gegenüber angeordnet ist, und/oder Mittel (30, 32, 38) zum Erfassen eines Fehlers der Rechtwinkligkeit zwischen der Sprühachse (X 2) und der zu beschichtenden Fläche (S3') umfasst,
    bei der die Sprühvorrichtung ausgebildet ist, nur zu sprühen, wenn die Sprühentfernung (d1, d2) zwischen dem Minimalwert und dem Maximalwert liegt und/oder nur, wenn der Winkel zwischen der Sprühachse (X2) der Vorrichtung und der zu beschichtenden Fläche (S3'), die der Sprühvorrichtung gegenüberliegt, zwischen einem Minimalwert und einem Maximalwert liegt, und
    dadurch gekennzeichnet, dass die Sprühvorrichtung (2) ausgebildet ist, nur zu sprühen, wenn die Bedienperson eine besondere Tätigkeit auf die Vorrichtung ausübt, die unterschiedlich zu der ist, die darin besteht, einen Betätigungshebel zu drücken.
  2. Anordnung nach Anspruch 1, bei dem das Alarmsystem ein visuelles Element, das beispielsweise mindestens eine LED aufweist, und/oder ein akustisches Element und/oder ein Vibrationselement (36) umfasst.
  3. Anordnung nach einem der vorhergehenden Ansprüche, bei dem das Alarmsystem zu der Sprühvorrichtung ausgelagert ist.
  4. Anordnung nach einem der Ansprüche 1 oder 2, bei dem das Alarmsystem an der Sprühvorrichtung (2) mitgeführt wird.
  5. Anordnung nach einem der vorhergehenden Ansprüche, bei der die Messmittel mindestens einen Ultraschallsensor (30, 32) oder einen Bewegungssensor, wie einen Beschleunigungssensor umfassen.
  6. Anordnung nach einem der vorhergehenden Ansprüche, bei dem die Erfassungsmittel eines der folgenden Elemente umfassen:
    - ein dreidimensionales Gyroskop oder
    - ein zweidimensionales Gyroskop oder
    - drei Ultraschallsensoren oder
    - mindestens zwei Neigungssensoren oder
    - ein eindimensionales Gyroskop und einen Neigungssensor oder
    - ein eindimensionales Gyroskop (38) und zwei Ultraschallsensoren (30, 32).
  7. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Sprühvorrichtung (2) eine Handpistole ist.
  8. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass diese besondere Tätigkeit darin besteht, auf einen Knopf (50) zu drücken und/oder die Vorrichtung in die Hand zu nehmen.
  9. Anordnung nach einem beliebigen der vorhergehenden Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Sprühvorrichtung (2) mit Sprachsteuerung ausgerüstet ist und ein Mikrofon umfasst, um mögliche Befehle der Sprachsteuerung zu erfassen, wobei die Aktivierung und das Anhalten des Sprühens durch mündlich auszudrückende Sprachbefehle gesteuert werden.
  10. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Anordnung ebenfalls ein System zur Anzeige der Sprühentfernung (d1, d2) und/oder ein System zur Anzeige der Orientierung der Vorrichtung in Bezug auf ein Trägheitsbezugssystem (X0, Y0, Z0) umfasst, um einer Bedienperson zu ermöglichen, die - Sprühentfernung in Bezug auf den Minimalwert und in Bezug auf den Maximalwert zu schätzen und/oder die Orientierung der Vorrichtung in Bezug auf einen minimalen Orientierungsgrad und einen maximalen Orientierungsgrad zu schätzen.
  11. Anordnung nach Anspruch 10, dadurch gekennzeichnet, dass das Anzeigesystem an der Sprühvorrichtung mitgeführt wird oder in Bezug auf die Sprühvorrichtung ausgelagert ist, wobei das Anzeigesystem beispielsweise einen Anzeigeschirm umfasst, der ausgebildet ist, an einer Wand einer Spritzkabine installiert zu werden.
  12. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Sprühvorrichtung eine Vorrichtung ohne Betätigungshebel ist.
  13. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Sprühvorrichtung ein Mittel zur Kommunikation mit einem Datensystem umfasst, das in der Lage ist, dem Datensystem zeitgleich oder zeitversetzt Informationen hinsichtlich des Sprühvorganges, wie der Sprühzeiten zu übertragen.
  14. Pneumatisches Sprühverfahren, das mittels einer Sprühvorrichtung durchgeführt wird" die umfasst:
    - einen Näherungssensor, der in der Lage ist, das Vorhandensein eines Objektes in einem Erfassungsfeld zu detektieren,
    - ein System zum Injizieren eines Beschichtungsstoffes,
    - ein System zum Injizieren von Zerstäubungsluft,
    dadurch gekennzeichnet, dass das Verfahren die folgenden automatisierten Schritte umfasst, während denen:
    a) das System zum Injizieren von Luft öffnet, wenn ein Objekt in das Erfassungsfeld des Sensors eindringt,
    b) das System zum Injizieren von Stoff öffnet in zeitverzögerter Weise in Bezug auf das System zum Injizieren von Luft,
    c) das System zum Injizieren von Stoff schließt, wenn das Objekt das Erfassungsfeld des Sensors verlässt,
    d) das System zum Injizieren von Luft schließt in zeitverzögerter Weise in Bezug auf das System zum Injizieren von Stoff.
  15. Pneumatisches Sprühverfahren, das mittels einer Sprühvorrichtung durchgeführt wird" die umfasst:
    - zwei Näherungssensoren, die in der Weise angeordnet sind, dass das Erfassungsfeld des einen mindestens teilweise in dem Erfassungsfeld des anderen enthalten ist,
    - ein System zum Injizieren eines Beschichtungsstoffes,
    - ein System zum Injizieren von Zerstäubungsluft
    dadurch gekennzeichnet, dass das Verfahren die folgenden automatisierten Schritte umfasst, während denen:
    a) das System zum Injizieren von Luft öffnet, wenn ein Objekt in das Erfassungsfeld von einem beliebigen der zwei Sensoren eindringt,
    b) das System zum Injizieren von Stoff öffnet, wenn das Objekt in das Erfassungsfeld des anderen Sensors eindringt,
    c) das System zum Injizieren von Stoff schließt, wenn das Objekt das Erfassungsfeld des einen beliebigen der zwei Sensoren verlässt,
    d) das System zum Injizieren von Luft schließt, wenn das Objekt das Erfassungsfeld des anderen Sensors verlässt.
EP18150750.0A 2017-01-10 2018-01-09 Alarmsystem, anordnung, die eine sprühvorrichtung und ein solches alarmsystem umfasst, und pneumatisches sprühverfahren Active EP3345682B1 (de)

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FR1750211A FR3061666B1 (fr) 2017-01-10 2017-01-10 Systeme d'alarme, ensemble comprenant un dispositif de pulverisation et un tel systeme d'alarme et procede de pulverisation pneumatique

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FR3061666B1 (fr) 2022-08-05
US20180193864A1 (en) 2018-07-12
FR3061666A1 (fr) 2018-07-13
EP3345682A1 (de) 2018-07-11

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