GB2277775A - Safety device for motorized doors - Google Patents
Safety device for motorized doors Download PDFInfo
- 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- Withdrawn
Links
- 239000000463 material Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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.
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)
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)
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 |
-
1993
- 1993-05-07 GB GB9309394A patent/GB2277775A/en not_active Withdrawn
Patent Citations (6)
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) |