GB2277775A - Safety device for motorized doors - Google Patents

Safety device for motorized doors Download PDF

Info

Publication number
GB2277775A
GB2277775A GB9309394A GB9309394A GB2277775A GB 2277775 A GB2277775 A GB 2277775A GB 9309394 A GB9309394 A GB 9309394A GB 9309394 A GB9309394 A GB 9309394A GB 2277775 A GB2277775 A GB 2277775A
Authority
GB
United Kingdom
Prior art keywords
conductive strips
door
gate tube
electromagnetic switch
motorized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9309394A
Other versions
GB9309394D0 (en
Inventor
Hsueh Shou Lu
Shien Tsai Chang
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9309394A priority Critical patent/GB2277775A/en
Publication of GB9309394D0 publication Critical patent/GB9309394D0/en
Publication of GB2277775A publication Critical patent/GB2277775A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/88—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for limiting unrolling
    • 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
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/44—Detection using safety edges responsive to changes in electrical conductivity
    • 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
    • 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
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/106—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for garages
    • 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
    • E05Y2900/40—Application of doors, windows, wings or fittings thereof for gates

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Gates (AREA)

Abstract

A safety device includes a gate tube (1) fastened to the free end (101;) of a motorized collapsible gate or roller door (10;) having two conductive strips (11; 11') spaced on the inside along the length respectively connected to an electromagnetic switch (2) through a transformer (3), the electromagnetic switch (2) controlling a motor drive (4) to close and open the motorized door (10;). The electromagnetic switch (2) is induced to cut off power supply from the motor drive (4) as the gate tube (1) is squeezed to connect the conductive strips (11; 11') with each other during the closing operation of the motorized door (10;). <IMAGE>

Description

SAFETY DEVICE FOR MOTORIZED DOORS The present invention relates to a safety device for a motorized door which automatically cuts off power supply as any object is in the way during the closing stroke of the motorized door.
A variety of motorized doors are manufactured, and widely used for controlling the entrance to a house, plant, room, etc. The conventional motorized doors are not safe in use because the motor drive keeps operating when a person is jammed in the door.
The present invention eliminates the aforesaid problem. According to one aspect of the present invention, the safety device comprises a collapsible gate tube having two conductive strips spaced on the inside respectively connected to an electromagnetic switch through a transformer to control power supply to a motor drive which controls the operation of a motorized door. The electromagnetic switch is induced to cut off power supply from the motor drive as the gate tube is squeezed to connect the conductive strips with each other during the closing operation of the motorized door.
According to another aspect of the present invention, the gate tube is made from a flexible, insulative material that can be bent to fit the motorized door to be controlled and cut to the desired length.
According to still another aspect of the present invention, the conductive strips on the gate tube are made made a conductive metal powder such as graphite powder, carbon powder, etc.
The present invention will now be described by way of example with reference to the annexed drawings, in which: Fig. 1 illustrates the structure of a gate tube according to the preferred embodiment of the present invention; Fig. 2 is an installed plan view according to the present invention; Fig. 3 illustrates the safety device of the present invention fastened to a sliding folding door; and Fig. 4 shows the door frame of the sliding folding door of Fig. 3 extended out.
Referring to Fig. 1, a collapsible gate tube 1 is made from plastics or rubber or any suitable insulative material in a flat, elongated, hollow configuration, having two conductive strips 11;11' covered on two large, opposing walls thereof on the inside and spaced from each other. The conductive strips 11;11' are made from a conductive metal powder and shape formed during the molding of the gate tube 1.
Any suitable conductive powder material such as copper powder, graphite powder, carbon powder, etc. can be used for making the conductive strips 11;11'. The conductive strips 11;11' form a contact switch which connects an electric circuit as the collapsible gate tube 1 is squeezed to stop the conductive strips 11;11' against each other.
Referring to Figure 2, the gate tube 1 is fastened to the bottom edge 101 of the motorized rolling door 10, and the conductive strips 11;11' are respectively connected to the two opposite terminals of a transformer 3 by black and white wires 31. The transformer 3 is electrically connected to a motor drive 4 through an electromagnetic switch 2 by black and white wires 21. If a person or an object is jammed in the door as the rolling door 10 is moved by the motor drive 4 toward the ground 5, the gate tube 1 will be squeezed, causing the conductive strips 11;11' contact each other.
As the conductive strips 11;11' are connected together, the electromagnetic switch 2 is induced to cut off the circuit, and therefore the motor drive 4 is stopped from moving the rolling door 10.
Further, the gate tube 1 can be made in shape according to the configuration of the door to be controlled. As illustrated in Figures 3 and 4, the gate strip 1 fastened to the free end 101' of a folding sliding door 10'. If a person or an object is jammed in the door as the folding sliding door 10' is moved toward the gatepost 5', power supply will be cut off automatically to stop the movement of the folding sliding door 10'.
Because the gate tube 1 is made from an insulative material, no electric shock will happen when one touch it with the hands. Because the gate tube 1 is collapsible and the conductive strips 1 are made of a conductive metal powder, the gate tube 1 can be bent to fit the configuration of the door and cut to the desired length without affecting its switching operation.

Claims (2)

1. A safety device comprising a gate tube fastened to the free end of a motorized door, said gate tube being collapsible and made from an insulative material in a flat, elongated, hollow configuration, having two conductive strips covered on two large, opposing walls thereof on the inside and spaced from each other, said conductive strips being respectively connected to an electromagnetic switch through a transformer, said electromagnetic switch being to control a motor drive, which is controlled to close and open said motorized door, whereby said electromagnetic switch is induced to cut off power supply from said motor drive as said gate tube is squeezed to connect said conductive strips with each other during the closing operation of said motorized door.
2. A safety device substantially as hereinbefore described and illustrated with reference to Figures 1, 2, 3 and 4 of the accompanying drawings.
GB9309394A 1993-05-07 1993-05-07 Safety device for motorized doors Withdrawn GB2277775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9309394A GB2277775A (en) 1993-05-07 1993-05-07 Safety device for motorized doors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9309394A GB2277775A (en) 1993-05-07 1993-05-07 Safety device for motorized doors

Publications (2)

Publication Number Publication Date
GB9309394D0 GB9309394D0 (en) 1993-06-23
GB2277775A true GB2277775A (en) 1994-11-09

Family

ID=10735073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9309394A Withdrawn GB2277775A (en) 1993-05-07 1993-05-07 Safety device for motorized doors

Country Status (1)

Country Link
GB (1) GB2277775A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108505917B (en) * 2018-05-31 2024-03-26 泉州市巨将防盗设备有限公司 Conductive adhesive tape and roller shutter door obstruction control system using same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1495393A (en) * 1973-12-18 1977-12-21 Westinghouse Electric Corp Elevator system with object detection means
US4115952A (en) * 1977-03-02 1978-09-26 American Can Company Safety door edge
US4273974A (en) * 1979-03-12 1981-06-16 Miller Norman K Elongate switch construction
DE3008597A1 (en) * 1980-03-06 1981-09-10 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Safety circuit for automatic sliding doors - has pressure switch closing loop forming sec. winding of transformer with prim. actuating proximity switch
US5087799A (en) * 1990-12-27 1992-02-11 Techstrip Inc. Power Door sensing strip
US5167432A (en) * 1989-05-16 1992-12-01 Mayser Gmbh & Co. Safety bumper with signalling device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1495393A (en) * 1973-12-18 1977-12-21 Westinghouse Electric Corp Elevator system with object detection means
US4115952A (en) * 1977-03-02 1978-09-26 American Can Company Safety door edge
US4273974A (en) * 1979-03-12 1981-06-16 Miller Norman K Elongate switch construction
DE3008597A1 (en) * 1980-03-06 1981-09-10 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Safety circuit for automatic sliding doors - has pressure switch closing loop forming sec. winding of transformer with prim. actuating proximity switch
US5167432A (en) * 1989-05-16 1992-12-01 Mayser Gmbh & Co. Safety bumper with signalling device
US5087799A (en) * 1990-12-27 1992-02-11 Techstrip Inc. Power Door sensing strip

Also Published As

Publication number Publication date
GB9309394D0 (en) 1993-06-23

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)