EP1870000B1 - Unite d'entrainement d'un corps mobile et dispositif de tiroir automatique utilisant celle-ci - Google Patents

Unite d'entrainement d'un corps mobile et dispositif de tiroir automatique utilisant celle-ci Download PDF

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Publication number
EP1870000B1
EP1870000B1 EP06728716.9A EP06728716A EP1870000B1 EP 1870000 B1 EP1870000 B1 EP 1870000B1 EP 06728716 A EP06728716 A EP 06728716A EP 1870000 B1 EP1870000 B1 EP 1870000B1
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EP
European Patent Office
Prior art keywords
drawer
obstruction
movable body
retreating
conveyance roller
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.)
Expired - Fee Related
Application number
EP06728716.9A
Other languages
German (de)
English (en)
Other versions
EP1870000A4 (fr
EP1870000A1 (fr
Inventor
Atsushi c/o CLEANUP CORPORATION NAKAZATO
Soichi c/o THK CO. LTD. SASAKI
Jun c/o THK CO. LTD. FURUKAWA
Yoshifumi c/o THK CO. LTD. NAGATO
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.)
THK Co Ltd
Original Assignee
THK Co Ltd
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 THK Co Ltd filed Critical THK Co Ltd
Publication of EP1870000A1 publication Critical patent/EP1870000A1/fr
Publication of EP1870000A4 publication Critical patent/EP1870000A4/fr
Application granted granted Critical
Publication of EP1870000B1 publication Critical patent/EP1870000B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
    • A47B88/40—Sliding drawers; Slides or guides therefor
    • A47B88/453—Actuated drawers
    • A47B88/457—Actuated drawers operated by electrically-powered actuation means
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/632—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings
    • E05F15/635—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings operated by push-pull mechanisms, e.g. flexible or rigid rack-and-pinion arrangements
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/632—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings
    • E05F15/635—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings operated by push-pull mechanisms, e.g. flexible or rigid rack-and-pinion arrangements
    • E05F15/641—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings operated by push-pull mechanisms, e.g. flexible or rigid rack-and-pinion arrangements operated by friction wheels
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/214—Disengaging means
    • E05Y2201/216—Clutches
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/23—Actuation thereof
    • E05Y2201/246—Actuation thereof by auxiliary motors, magnets, springs or weights
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/46—Magnets
    • E05Y2201/462—Electromagnets
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/674—Friction wheels
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/20—Application of doors, windows, wings or fittings thereof for furniture, e.g. cabinets

Definitions

  • the present invention relates to a movable body drive unit provided between a pair of members making relative reciprocating movement in a predetermined direction such as sliding doors of fittings and drawers of an article of furniture and adapted to cause those members to advance and retreat relative to each other, and an automatic drawer device using the same, according to the preamble portions of claims 1 and 9.
  • a device which opens and closes a movable member such as a drawer of an article of furniture or of a built-in kitchen ( JP 2003-189955 A , JP 2003-334120 A , etc.). More specifically, a movable member such as a drawer is arranged so as to be freely retractable with respect to a fixed frame body such as an article of furniture, and the movable member is equipped with a rack extending in the direction in which the rack advances and retreats. On the other hand, a gear that is in mesh with the rack is provided on the fixed frame body, and through rotation of the gear upon switch operation by a user, the drawer is caused to advance or retreat according to the rotating direction of the gear.
  • a grip of the drawer grasped by the user is equipped with a measuring device for detecting a direction and a magnitude of a force applied thereto. Further, the gear is rotated upon an output signal from the measuring device, making it possible to automatically open and close the drawer.
  • Document GB 2374521 A discloses a movable body drive unit and an automatic drawer device according to the preamble of claims 1 and 9.
  • the present invention has been made in view of the above problems. It is an object of the present invention to provide a movable body drive unit for causing a movable member such as a drawer to advance and retreat along a predetermined advancing/retreating route, in which, even in a case where there exists an obstacle in the advancing/retreating route of the movable member, the movable member is caused to immediately stop its advancing/retreating movement upon collision with the obstacle to thereby prevent damage of the obstacle and the movable member itself and secure a sufficient level of safety for the user and the like.
  • Another object of the present invention is to provide an automatic drawer device for opening and closing a drawer by using the movable body drive unit, in which when the drawer comes into contact with an obstacle, the advancement/retreating of the drawer is immediately stopped to thereby prevent damage of the obstacle and the drawer itself and secure a sufficient level of safety for the user and the like.
  • the present invention relates to a movable body drive unit mounted to a second member supported so as to be capable of making relative reciprocating movement relative to a first member and adapted to cause the second member to advance and retreat relative to the first member.
  • the movable body drive unit causes the second member to advance and retreat relative to the first member, so it is possible for the first member to be on a fixed side, with the movable body drive unit advancing and retreating together with the second member, or for the second member to be on the fixed side, with the movable body drive unit causing solely the first member to advance and retreat with respect to the second member.
  • the movable body drive unit includes: a conveyance roller held in press contact with a traveling surface provided on the first member; a drive means for rotating the conveyance roller in a normal direction or a reverse direction; a user input means for giving the drive means a command to cause the second member to advance or retreat; a control means for generating a drive signal for the drive means in response to an input signal of the user input means; and an obstruction detection means which makes a judgment as to whether there has been generated any obstruction to relative advancement/retreating of the first member and the second member, and which, upon determining there is an obstruction, gives the control means a command to stop the drive means.
  • the obstruction detection means detects it.
  • a command is given to the control means to stop the drive means.
  • the drive means is stopped irrespective of the input signal of the user input means, and the rotation of the conveyance roller stops, thus stopping the movement of the second member with respect to the first member.
  • the first member is a fixed frame body of an article of furniture or the like and in which the second member is a drawer retractable to the fixed frame body, if a finger is inadvertently caught between the drawer and the fixed frame body, this does not lead to serious injury since the drawer stops immediately.
  • the obstruction detection means it is only necessary for the obstruction detection means to be capable of judging whether there has been generated an obstruction to relative advancing and retreating of the first member and the second member.
  • a speed detection means for detecting an advancing/retreating speed of the second member with respect to the first member, when it is judged from an output signal of the speed detection means that the advancing/retreating speed of the second member has been markedly reduced, it is determined that there is an obstruction.
  • the speed detection means it is possible for the speed detection means to be, for example, a rotary encoder rotating according to the advancing/retreating amount of the second member or a linear encoder for reading a magnetic scale attached to the first member as the second member moves.
  • the drive means is an electric motor
  • another example of the obstruction detection means may be one which detects generation of an obstruction from fluctuations in the value of an electric current flowing through the motor.
  • the obstruction detection means judges an obstacle to be present and gives the control means a command to stop the drive means
  • the first member or the second member stops in a state in which it abuts against the obstacle
  • the operation of removing the obstacle is rather hard to perform.
  • a finger is caught between the fixed frame body being the first member and the drawer being the second member
  • this state will be allowed to continue, resulting in an unexpected injury.
  • the obstruction detection means judges the obstacle to be present and the drive means stops, it is desirable to separate the first member or the second member immediately from the obstacle after the stopping.
  • taking the trouble to perform control to reverse the conveyance roller in order to separate the first member or the second member from the obstacle will result in a rather complicated construction of the control portion generating the drive signal of the drive means.
  • an absorption/repulsion means which absorbs at least a part of torque transmitted from the drive means to the conveyance roller from the point in time when the first member or the second member abuts against the obstacle and is locked in its movement until the point in time when the drive means is stopped, and which, as the drive means stops, separates the first member or the second member from the obstacle by using a reaction force of the absorbed torque. It is possible to realize the absorption/repulsion means, for example, by covering the surface of the conveyance roller with a soft and elastic layer or by providing an elastic joint in the power transmission route from the drive means to the conveyance roller.
  • the electromagnetic clutch cuts off the connection between the conveyance roller and the drive means while the drive means is at rest, the user can move the first member relative to the second member through manual operation without having to use the movable body drive unit of the present invention, thereby helping to achieve an improvement in terms of convenience.
  • the movable body drive unit of the present invention constructed as described above, it is possible to easily form an automatic drawer device that can open and close various drawers of built-in kitchens, articles of furniture, or the like through switch operation. Further, in such an automatic drawer device, when there exists an obstacle hindering the drawer opening/closing operation, the opening/closing operation is automatically stopped, making it possible to prevent damage of the obstacle or the drawer itself and to avoid trouble such as catching of the user's finger.
  • Figs. 1 and 2 are a plan view and a side sectional view, respectively, of an automatic drawer device 1 equipped with a movable body drive unit according to the present invention.
  • the automatic drawer device 1 includes a fixed frame body 2 formed in a box shape, a drawer 3 drawn into and out of the fixed frame body 2 in the horizontal direction as seen in the drawing, and a movable body drive unit 10 for causing the drawer 3 to advance and retreat with respect to the fixed frame body 2, the movable body drive unit 10 causing the drawer 3 to advance and retreat through switch operation.
  • the drawer 3 is supported by the fixed frame body 2 through the intermediation of a pair of slide devices 4a, 4b.
  • the slide devices 4a, 4b for example, have outer rails fixed to the fixed frame body 2, inner rails fixed to the drawer 3, and a large number of balls rolling between those rails while bearing load, making it possible to cause the drawer 3 to freely advance and retreat with respect to the fixed frame body 2 with a very small force.
  • the slide devices 4a, 4b it is possible to select and use a well-known slide device construction as appropriate.
  • the movable body drive unit 10 has a conveyance roller 11 fixed to a back plate 3a of the drawer 3 and traveling on a bottom plate 2a of the fixed frame body 2.
  • the conveyance roller 11 By rotating the conveyance roller 11, the movable body drive unit 10 runs of its own accord on the bottom plate 2a of the fixed frame body 2 together with the drawer 3.
  • a roughened skidproof sheet 12 is attached to the traveling region of the bottom plate 2a for the conveyance roller 11.
  • a power cord 13 extends from a back plate 2b of the fixed frame body 2 to the movable body drive unit 10, making it possible to supply electricity to the movable body drive unit 10.
  • a curled cord is used, which expands and contracts as the drawer 3 is opened and closed.
  • a switch panel 14 as the user input means; by operating the switch panel 14, an operational command is given to the movable body drive unit 10.
  • the switch panel 14 may be one equipped with pushbutton switches respectively corresponding to the operations of opening, closing and stopping the drawer 3, or one which allows operational input according to the number of times by which a pushbutton switch is depressed.
  • the switch panel 14 may be mounted to the front plate 3b of the drawer 3; according to the arrangement of the drawer 3 to be operated, it may be provided on the fixed frame body 2 side instead on the drawer 3 (movable body) side. Further, the switch panel 14 may be formed as a foot switch allowing operation with tiptoes. In the case of a foot switch, it is possible for the user to open the drawer 3 even when the user is holding with both hands the article to be accommodated in the drawer 3, which leads to superiority in convenience.
  • Fig. 3 is a front sectional view of an example of the movable body drive unit 10.
  • the unit 10 is equipped with a casing 15 fixed to the back plate 3a of the drawer 3, the conveyance roller 11 supported so as to be rotatable with respect to the casing 15, an electric motor 16 fixed to the casing 15 and serving as a drive means, a gear row 17 including a plurality of gears 17a, 17b, 17c and adapted to transmit the rotational output of the electric motor 16 to the conveyance roller 11, and an electromagnetic clutch 18 provided between the electric motor 16 and the gear row 17.
  • the electric motor 16 and the gear row 17 are connected, making it possible to transmit the torque of the electric motor 16 to the conveyance roller 11.
  • the electric motor 16 a DC motor is used; by changing the direction in which voltage is applied to the electric motor 16, the rotating direction of the electric motor 16 is reversed, making it possible to switch the rotating direction of the conveyance roller 11.
  • the reason for thus providing the electromagnetic clutch 18 in the power transmission route from the electric motor 16 to the conveyance roller 11 is to lighten the operational feel when the user opens/closes the drawer 3 through manual operation without using the movable body drive unit 10. If the electromagnetic clutch 18 is not provided and the electric motor 16 and the conveyance roller 17 are directly connected through the gear row 17, opening/closing the drawer 3 manually without energizing the electric motor 16 would cause the conveyance roller 11 to rotate the electric motor 16, thereby making the operational feel in opening/closing the drawer 3 rather heavy.
  • a soft and elastic layer 19 formed of urethane rubber or the like is provided on the surface of the conveyance roller 11.
  • the soft and elastic layer 19 is slightly crushed, thereby preventing slippage between the conveyance roller 11 and the bottom plate 2a.
  • the rotation of the conveyance roller 11 is directly supported by the casing 15, it is also possible to provide a saddle plate supported by the casing 15 through the intermediation of a spring, supporting the conveyance roller 11 by this saddle plate.
  • the movable body drive unit 10 has, on the front and rear sides in the moving direction of the drawer, a pair of position switches 20a, 20b for detecting the end positions in the advancement and retreating of the drawer 3, that is, the state in which the drawer 3 has been completely accommodated in the fixed frame body 2 and the state in which it has been completed drawn out of the fixed frame body 2.
  • Fig. 4 shows those position switches in detail.
  • Movable blocks 21a, 21b are respectively provided on the front surfaces of actuators of the position switches 20a, 20b, and the movable blocks 21a, 21b are retained so as to be vertically movable with respect to the casing 15.
  • switch dogs 22a, 22b are fixed to the bottom plate 2a of the fixed frame body 2 in correspondence with both ends of the advancing/retreating stroke of the drawer 3.
  • the movable block 21a runs onto the switch dog 22a
  • the movable block 21b runs onto the switch dog 22b.
  • the movable block 21a is pushed up, and the actuator of the position switch 20a is depressed, whereby the output signal of the position switch 20a undergoes a change. That is, when the drawer 3 attains one of the two ends of the advancing/retreating stroke, the output signal of the position switch 20a or 20b undergoes a change, and it is possible to judge which of the terminal positions the drawer 3 has reached.
  • the movable body drive unit 10 is provided with a speed detection means 5 for detecting the moving speed of the drawer 3.
  • the speed detection means 5 includes a detection roller 50 rotatably supported by the casing 15, and a rotary encoder 51 adapted to output a signal corresponding to the rotating speed of the detection roller 50.
  • the rotary encoder 51 includes a transmission type photo sensor 52 in which a light emitting element and a light receiving element are opposed to each other across a detection space 52a, and a disc dog 53 inserted into the detection space 52 and intercepting the optical path between the light emitting element and the light receiving element, with the disc dog 53 being fixed to a rotation shaft 50a of the detection roller 50.
  • the disc dog 53 has a large number of slits 53a arranged radially at equal intervals; each time one of the slits 53a passes the detection space 52a of the photo sensor 52, an optical path is formed between the light emitting element and the light receiving element, and the output signal of the photo sensor 52 undergoes a change.
  • the detection roller 50 runs on the bottom plate 2a of the fixed frame body 2, and the output signal of the photo sensor 52 is turned on/off at a speed corresponding to the rotating speed of the detection roller 50.
  • the detection roller 50 In the speed detection means 5, it is not necessary to provide the detection roller 50; from the viewpoint of detecting the advancing/retreating speed of the drawer 3 with respect to the fixed frame body 2, it is also possible to fix the disc dog 53 directly to the rotation shaft of the conveyance roller 11. It should be noted, however, that rotational torque for causing the drawer 3 to advance and retreat is input to the conveyance roller 11 from the electric motor 16, and that there is a risk of the conveyance roller 11 undergoing slippage with respect to the bottom plate 2a of the fixed frame body 2. Thus, from the viewpoint of more correctly grasping the moving speed of the drawer 3, it is desirable to provide the detection roller 50 separately from the conveyance roller 11 as described above, fixing the disc dog 53 to the detection roller 50.
  • the detection roller 50 in order to prevent slippage of the detection roller 50 with respect to the bottom plate 2a, it is desirable to cover the surface of the detection roller 50 with a material of high friction coefficient such as rubber.
  • a material of high friction coefficient such as rubber.
  • the rotary encoder 51 is used as the speed detection means 5, it is possible to obtain a similar output signal by using a linear encoder.
  • a linear scale having physical marks arranged at equal intervals is attached to the bottom plate 2a of the fixed frame body 2, and the marks of the linear scale is read by a reading head fixed to the casing 15 as the drawer 3 moves.
  • Fig. 7 is a block diagram showing a control system of the movable body drive unit 10.
  • a control portion 6 is equipped with an LSI serving as a microcomputer; it controls the rotation of the electric motor 16 and controls the operation of the electromagnetic clutch 18 in response the output signals from the switch panel 14, the position switches 20a, 20b, and the rotary encoder 51.
  • the control portion 6 is supplied with power from a power source 7 through the power cord 13.
  • the control portion 6 When the opening or closing of the drawer 3 is input from the switch panel 14, the control portion 6 applies a voltage according to the direction of the input to the electric motor 16 to rotate the electric motor 16, and applies a voltage also to the electromagnetic clutch 18 to connect the electric motor 16 and the gear row 17. As a result, the conveyance roller 11 of the movable body drive unit 10 rotates, and the drawer 3 moves with respect to the fixed frame body 2.
  • the control portion 6 stops the application of voltage to the electric motor 16, and then also stops the application of voltage to the electromagnetic clutch 18 to separate the electric motor 16 and the gear row 17 from each other.
  • the conveyance roller 11 stops its rotation, and the advancement/retreating of the drawer with respect to the fixed frame body 2 is stopped, making it possible from this onward to cause the drawer 3 to advance and retreat through manual operation.
  • the control portion 6 can ascertain whether the drawer 3 is in the open state or the closed state. Therefore, if, for example, a opening command is input from the switch panel 14 although the drawer is in the open state, no voltage is applied to the electric motor 16 and the electromagnetic clutch 18, and they are kept at rest. This also applies to the case in which a closing command is input from the switch panel 14 although the drawer is in the closed state.
  • the control portion 6 counts the number of output signals from the rotary encoder 51 per unit time; when the count value becomes not more than a predetermined value, the application of voltage to the electric motor 16 and the electromagnetic clutch 18 is stopped regardless of the input from the switch panel 14.
  • the rotary encoder 51 outputs pulse signals at a speed corresponding to the moving speed of the drawer 3, so if the number of output signals from the rotary encoder 51 per unit time has become not more than a predetermined value, it means that the moving speed of the drawer 3 has been reduced to an extreme degree, and trouble is to be expected, such as locking of the drawer 3 by an obstacle.
  • the application of voltage to the electric motor 16 and the electromagnetic clutch 18 is immediately stopped, and the rotation of the conveyance roller 11 is stopped. That is, in the movable body drive unit 10, the obstruction detection means, which is a constituent feature of the present invention, is formed by the speed detection means 5 and the control portion 6.
  • Fig. 8 is a flowchart illustrating the control procedures related to the stopping of the conveyance roller 11; while the control portion 6 is applying voltage to the electric motor 16, those procedures are always executed irrespective of the moving direction of the drawer 3.
  • the input signal of the rotary encoder 51 is first checked, thereby checking whether or not the moving speed of the drawer 3 has been reduced to a level not higher than a predetermined speed (ST1).
  • This predetermined speed is set relatively low with leeway with respect to the moving speed of the drawer 3 generated through rotation of the conveyance roller 11.
  • the judgment as to whether the moving speed has been reduced to a level not higher than the predetermined speed is made by counting the number of output signals of the rotary encoder 51 per unit time as described above and by checking whether the count number has become smaller than a predetermined value or not.
  • the drawer 3 in the movable body drive unit 10, when the movement of the drawer 3 is forcibly locked by an obstacle, and the driving of the electric motor 16 is stopped upon detection of this locking, the drawer 3 is automatically separated from the obstacle with which it has been in contact. Thus, it is possible to instantaneously cancel the state in which the drawer 3 is in contact with the obstacle, and there is no need for the user him/herself to manually retract the drawer 3 to remove the obstacle, thus achieving an improvement in terms of operability. Further, even when the user inadvertently gets his finger caught between the fixed frame body 2 and the drawer 3, the drawer 3 automatically retreats immediately after the stopping of the electric motor 16, so it is possible to instantaneously cancel the state in which the finger is caught, thus making it possible to prevent an accidental injury.
  • the soft and elastic layer 19 covering the surface of the conveyance roller 11 constitutes the absorption/repulsion means of the present invention.
  • the retracting amount of the drawer 3 depends upon the amount of strain generated in the soft and elastic layer 19. For example, when the thickness of the soft and elastic layer 19 is increased, the amount of strain generated by the soft and elastic layer 19 is so much the larger, so the retracting amount of the drawer 3 when the strain is released is increased.
  • this absorption/repulsion means is not always restricted to the soft and elastic layer 19 covering the conveyance roller 11.
  • a speed detection means such as the rotary encoder 51 is used to detect the state in which the movement of the drawer 3 is locked by an obstacle against which it abuts
  • Fig. 9 is a block diagram showing a control system used in this case. An ampere meter 8 is provided between the control portion 6 and the electric motor 16, and the output signal of the ampere meter 8 is compared with a predetermined value at the control portion 6. When the drawer abuts an obstacle, the torque of the electric motor increases, and the value of electric current flowing through the electric motor increase in accordance therewith.
  • the control portion 6 decides that the drawer 3 has abutted an obstacle, and stops the application of voltage to the electric motor 16 and the electromagnetic clutch 18. With this construction also, it is possible to detect whether the drawer has abutted an obstacle or not.
  • the movable body drive unit of the present invention is applied to an automatic drawer
  • the movable body drive unit is also applicable to various other conveying devices; by being fixed to the object to be conveyed, it allows the object to attain linear self-propelling motion.
  • the movable body drive unit has been described as applied to an automatic drawer device.

Landscapes

  • Drawers Of Furniture (AREA)

Claims (17)

  1. Unité d'entraînement de corps mobile (10), qui est montée sur un deuxième élément (3) maintenu de façon à être capable d'effectuer un mouvement alternatif librement par rapport à un premier élément (2), et qui fait avancer et reculer le deuxième élément (3) par rapport au premier élément (2), comprenant :
    un rouleau de transport (11) maintenu en contact par pression avec une surface de défilement prévue sur le premier élément (2) ;
    un moyen d'entraînement (16, 17) pour faire tourner le rouleau de transport (11) dans un sens normal ou dans un sens inverse ;
    un moyen d'entrée utilisateur (14) pour donner une commande au moyen d'entraînement (16, 17) pour faire avancer ou reculer le deuxième élément (3) ;
    un moyen de commande (6) pour générer un signal d'entraînement pour le moyen d'entraînement (16, 17) en réponse à un signal d'entrée du moyen d'entrée utilisateur (14) ; et
    un moyen de détection d'obstacle (5, 6) qui rend un jugement de si un quelconque obstacle à l'avancée / au recul relatifs du premier élément (2) et du deuxième élément (3) a été générée, et qui, lorsqu'il détermine qu'il y a un obstacle, donne une commande au moyen de commande (6) pour arrêter le moyen d'entraînement (16, 17) lorsqu'il détermine qu'il y a un obstacle,
    caractérisé par
    un moyen d'absorption / de répulsion (19) qui absorbe au moins une partie du couple transmis du moyen d'entraînement (16, 17) au rouleau de transport (11) à partir du moment où un obstacle à l'avancée / au recul relatifs du premier élément (2) et du deuxième élément (3) est généré jusqu'au moment où le moyen d'entraînement (16, 17) s'arrête, et qui, alors que le moyen d'entraînement (16, 17) s'arrête, sépare le premier élément (2) ou le deuxième élément (3) d'un obstacle en utilisant une force de réaction du couple absorbé.
  2. Unité d'entraînement de corps mobile selon la revendication 1, dans laquelle le moyen de détection d'obstacle (5, 6) a un moyen de détection de vitesse (5) pour détecter une vitesse d'avancée / de recul du deuxième élément (3), et juge s'il y a un quelconque obstacle à l'avancée / au recul du deuxième élément (3) à partir d'un signal de sortie du moyen de détection de vitesse (5).
  3. Unité d'entraînement de corps mobile selon la revendication 2, dans laquelle le moyen de détection de vitesse (5) comprend un codeur rotatif (51) adapté pour tourner selon une quantité d'avancée / de recul du deuxième élément (3).
  4. Unité d'entraînement de corps mobile selon la revendication 1, dans laquelle le moyen de détection d'obstacle (6) a un ampèremètre pour mesurer une valeur de courant électrique du moyen d'entraînement (16), et juge si il y a un quelconque obstacle à l'avancée / au recul du deuxième élément (3) à partir d'une valeur de mesure de l'ampèremètre.
  5. Unité d'entraînement de corps mobile selon la revendication 1, dans laquelle le moyen d'absorption / de répulsion (19) comprend une couche souple et élastique recouvrant une surface du rouleau de transport (11).
  6. Unité d'entraînement de corps mobile selon la revendication 1,
    dans laquelle le moyen d'entraînement est composé d'un moteur (16) et d'une rangée d'engrenages (17) transmettant la puissance de rotation du moteur (16) au rouleau de transport (11), et
    dans laquelle le moyen de commande (6) coupe la fourniture d'électricité au moteur (16) lorsque le moyen d'entraînement doit être arrêté.
  7. Unité d'entraînement de corps mobile selon la revendication 6,
    dans laquelle la rangée d'engrenages (17) inclut un embrayage électromagnétique (18), et
    dans laquelle l'embrayage électromagnétique (18) coupe la transmission de puissance à travers la rangée d'engrenages (17) lorsque le moyen d'entraînement doit être arrêté.
  8. Unité d'entraînement de corps mobile selon la revendication 6,
    dans laquelle aux deux extrémités d'une course d'avancée / de recul du deuxième élément (3) par rapport au premier élément (2), il est prévu des interrupteurs de position (20a, 20b) pour détecter l'arrivée du deuxième élément (3), et
    dans laquelle le moyen de commande (6) coupe la fourniture d'électricité au moteur (16) en réponse à un signal de sortie de chacun des interrupteurs de position (20a, 20b).
  9. Dispositif de tiroir automatique, comprenant :
    un corps à châssis fixe (2) ;
    un tiroir (3) capable d'avancer et de reculer librement par rapport au corps à châssis fixe (2) ; et
    une unité d'entraînement de corps mobile (10) fixée à l'un parmi le corps à châssis fixe (2) et le tiroir (3) et faisant avancer et reculer le tiroir (3) par rapport au corps à châssis fixe (2),
    dans lequel l'unité d'entraînement de corps mobile (10) est équipée avec :
    un rouleau de transport (11) faisant bouger le tiroir (3) ;
    un moyen d'entraînement (16, 17) faisant tourner le rouleau de transport (11) dans un sens normal ou dans un sens inverse ;
    un moyen d'entrée utilisateur (14) pour donner une commande au moyen d'entraînement (16, 17) pour faire avancer ou reculer le tiroir (3) ;
    un moyen de commande (6) pour générer un signal d'entraînement pour le moyen d'entraînement (16, 17) en réponse à un signal d'entrée du moyen d'entrée utilisateur (14) ; et
    un moyen de détection d'obstacle (5, 6) qui rend un jugement de s'il y a un quelconque obstacle à l'avancée / au recul du tiroir (3), et qui, lorsqu'il détermine qu'il y a un obstacle, donne une commande au moyen de commande (6) pour arrêter le moyen d'entraînement (16, 17),
    caractérisé par
    un moyen d'absorption / de répulsion (19), qui absorbe au moins une partie du couple transmis du moyen d'entraînement (16) au rouleau de transport (11) à partir du moment où un obstacle à l'avancée / au recul du tiroir (3) est généré jusqu'au moment où le moyen d'entraînement (16) s'arrête, et qui, alors que le moyen d'entraînement (16) s'arrête, sépare le tiroir (3) d'un obstacle en utilisant une force de réaction du couple absorbé.
  10. Dispositif de tiroir automatique selon la revendication 9, dans lequel le moyen de détection d'obstacle (5, 6) a un moyen de détection de vitesse (5) pour détecter une vitesse d'avancée / de recul du tiroir (3), et juge s'il y a un quelconque obstacle à l'avancée / au recul du tiroir (3) à partir d'un signal de sortie du moyen de détection de vitesse (5).
  11. Dispositif de tiroir automatique selon la revendication 9, dans lequel le moyen de détection de vitesse (5) comprend un codeur rotatif (51) adapté pour tourner selon une quantité d'avancée / de recul du tiroir (3).
  12. Dispositif de tiroir automatique selon la revendication 9, dans lequel le moyen de détection d'obstacle (5, 6) a un ampèremètre pour mesurer une valeur de courant électrique du moyen d'entraînement (16), et juge si il y un quelconque obstacle à l'avancée / au recul du tiroir (3) à partir d'une valeur de mesure de l'ampèremètre.
  13. Dispositif de tiroir automatique selon la revendication 9, dans lequel le moyen d'absorption / de répulsion (19) comprend une couche souple et élastique recouvrant une surface du rouleau de transport (11).
  14. Dispositif de tiroir automatique selon la revendication 9,
    dans lequel le moyen d'entraînement est composé d'un moteur (16) et d'une rangée d'engrenages (17) transmettant la puissance de rotation du moteur (16) au rouleau de transport (11), et
    dans lequel le moyen de commande (6) coupe la fourniture d'électricité au moteur (16) lorsque le moyen d'entraînement doit être arrêté.
  15. Dispositif de tiroir automatique selon la revendication 14,
    dans lequel la rangée d'engrenages (17) comprend un embrayage électromagnétique (18), et
    dans lequel l'embrayage électromagnétique (18) coupe la transmission de puissance à travers la rangée d'engrenages (17) lorsque le moyen d'entraînement (16) doit être arrêté.
  16. Dispositif de tiroir automatique selon la revendication 14,
    dans lequel, aux deux extrémités d'une course d'avancée / de recul du tiroir (3), il est prévu des interrupteurs de position (20a, 20b) pour détecter l'arrivée du tiroir (3), et
    dans lequel le moyen de commande (6) coupe la fourniture d'électricité au moteur (16) en réponse à un signal de sortie de chacun des interrupteurs de position (20a, 20b).
  17. Dispositif de tiroir automatique selon la revendication 9, dans lequel le moyen d'entrée utilisateur (14) comprend un interrupteur à pied prévu sur une surface avant du tiroir en correspondance avec les pieds d'un utilisateur.
EP06728716.9A 2005-03-31 2006-03-07 Unite d'entrainement d'un corps mobile et dispositif de tiroir automatique utilisant celle-ci Expired - Fee Related EP1870000B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005101396 2005-03-31
PCT/JP2006/304347 WO2006112189A1 (fr) 2005-03-31 2006-03-07 Unite d'entrainement d'un corps mobile et dispositif de tiroir automatique utilisant celle-ci

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EP1870000A1 EP1870000A1 (fr) 2007-12-26
EP1870000A4 EP1870000A4 (fr) 2012-06-06
EP1870000B1 true EP1870000B1 (fr) 2014-01-01

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DE202009001324U1 (de) * 2009-02-04 2010-06-24 Paul Hettich Gmbh & Co. Kg Ausstoßeinheit und Möbel
US8434837B2 (en) * 2009-07-08 2013-05-07 Lg Electronics Inc. Refrigerator
AT510549B1 (de) * 2011-02-21 2012-05-15 Blum Gmbh Julius Möbelantrieb
FR2972478B1 (fr) * 2011-03-07 2019-04-26 Christian Chorin Dispositif motorise d'ouverture et de fermeture d'une structure mobile, telle qu'un portail ou analogue
DE202012009450U1 (de) * 2012-10-01 2014-01-07 Hetal-Werke Franz Hettich Gmbh & Co. Kg Bewegungsvorrichtung für ein bewegbares Möbelteil
CN210374267U (zh) * 2019-06-11 2020-04-21 青岛海尔电冰箱有限公司 冰箱
DE102020114911A1 (de) * 2020-06-04 2021-12-09 ambigence GmbH & Co. KG Möbelkomponente mit einem Möbelbeschlag und einem Motor zur beweglichen Verbindung zweier Möbelteile
KR102554412B1 (ko) * 2021-10-06 2023-07-11 네이버랩스 주식회사 배송 로봇

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EP1870000A4 (fr) 2012-06-06
JP5059606B2 (ja) 2012-10-24
EP1870000A1 (fr) 2007-12-26
WO2006112189A1 (fr) 2006-10-26
JPWO2006112189A1 (ja) 2008-12-04

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