CA1201136A - Powered door opening system - Google Patents
Powered door opening systemInfo
- Publication number
- CA1201136A CA1201136A CA000439399A CA439399A CA1201136A CA 1201136 A CA1201136 A CA 1201136A CA 000439399 A CA000439399 A CA 000439399A CA 439399 A CA439399 A CA 439399A CA 1201136 A CA1201136 A CA 1201136A
- Authority
- CA
- Canada
- Prior art keywords
- trolley
- assembly
- head assembly
- guide rail
- operator head
- 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
Links
- 230000001419 dependent effect Effects 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims abstract description 5
- 230000001960 triggered effect Effects 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract 1
- 239000000306 component Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
Classifications
-
- 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
- E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
- E05F15/668—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings
- E05F15/681—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings operated by flexible elongated pulling elements, e.g. belts
- E05F15/684—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings operated by flexible elongated pulling elements, e.g. belts by chains
-
- 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
- E05Y2201/644—Flexible elongated pulling elements
- E05Y2201/646—Flexible elongated pulling elements continuous, e.g. closed loops
-
- 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
- E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
-
- 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
Landscapes
- Power-Operated Mechanisms For Wings (AREA)
Abstract
A B S T R A C T
A powered garage door opening system is provided for easy installation and service without a skilled installer or repairman. The system includes in combination a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail structure for slid-able movement lengthwise thereof, drawbar pivotally connected to the trolley unit for connection to a door, chain drive extending for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at the other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive device located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain increases;
an operator head assembly comprising a casing containing a motor with speed reduction to a drive shaft, the drive shaft having a threaded section with threaded limit cams thereon to move up or down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cams to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting with the tab of the chain tension responsive device when the operator head assembly is joined to the trolley assembly, the operator head assembly containing all the electrical circuitry, and connector for joining the trolley assembly and operator head assembly comprising a forked end on the drive shaft of the operator head assembly.
adapted to fit into an engaging pin socket connecting directly to the driving sprocket of the chain drive in the trolley assembly, and including bolts to hold the trolley assembly and the operator head assembly in joined relation-ship.
A powered garage door opening system is provided for easy installation and service without a skilled installer or repairman. The system includes in combination a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail structure for slid-able movement lengthwise thereof, drawbar pivotally connected to the trolley unit for connection to a door, chain drive extending for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at the other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive device located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain increases;
an operator head assembly comprising a casing containing a motor with speed reduction to a drive shaft, the drive shaft having a threaded section with threaded limit cams thereon to move up or down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cams to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting with the tab of the chain tension responsive device when the operator head assembly is joined to the trolley assembly, the operator head assembly containing all the electrical circuitry, and connector for joining the trolley assembly and operator head assembly comprising a forked end on the drive shaft of the operator head assembly.
adapted to fit into an engaging pin socket connecting directly to the driving sprocket of the chain drive in the trolley assembly, and including bolts to hold the trolley assembly and the operator head assembly in joined relation-ship.
Description
:~LZO~l31~
POWERED DOOR OPENING SYSTEM
The present invention relates to a device to auto-matically open and close doors, more specifically to a powered door opening system for opening and closing garage doors for households, apartments and the like.
S Conventional garage door openers are generally shipped to a building site in a series of different com-ponents which require assembly on site. The assembly of these components often require a skilled installer and it is generally necessary to ensure proper alignment between the components to ensure that the system works satisfactor-ily. Furthermore, in the event of a problem occurring with one or more of the components of the garage door opening system it is necessary to either call in a skilled repairman or alternatively to remove the complete unit and r~turn it to the factory for repair.
The present invention provides a powered door opening system which comes in only two parts: a trolley assembly and an operator head assembly which may be mounted together by any householder or nonskilled person by merely slipping a shaft into a self locking socket and attaching three nuts. All the electrics are included in the operator head assembly. Furth0rmore, the unit may be purchased from a hardware store and installed by the house-holder himself. If a problem occurs with one part of the systemr then only that part need be returned for repair or replacement.
The powered door opening system of the present invention does no~ requir~ alig~ment from the motor drive mechanism to the trolle~ assembly but has a simple fork and pin joint that cannot ~e misaligned and is self lock-ing. No separatiny forces occur between the shaft and the socket. This distinguishes over such s~stems as that shown by Ellmore in U.S. Patent 4,231,191 which requires align-ment between a pinion of an operator unit and a gear of a chain drive system. Such a system always has a separat-ing force between the pinion and gear. It will also be appreciated that if there is misalignment between the pinion and gear, excessive wear may occur or, alternatively an inefficient drive system requiring excessive power is needed.
The present invention provides a powered door open-ing system including in combination: (a) a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail struct~re for slidable movement length-wise thereof, drawbar means pivotally connected to the trolley unit for connection to a door, chain drive extend-ing for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at th~
other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive means, located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain drive increases, (h) an operator head assembly comprising a casing containing a motor with speed reduction drive means to a drive shaft, the drive shaft having a threaded section with threaded limit cams thereon to move up or down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cams to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting withthe tab of the chain tension responsive means when the operator head assembly is joined to the trolley assembly/ the operator head ass~mhly containing all electrical circuitry, and tc) connector means for joining the trolley assembly and the operator head assembly comprising: a forked end on the drive shaft of the operator head assembly, adapted to fit into an engaging pin socket connecting directly to the 3~
driving sprocket of the chain drive in the trolley assembly, and including bolt means to hold the trolley assembly and the operator head assembly in joined relationship.
In the preEerred embodiment the engaging pin socket and the driving sprocket are supported by an antifriction bearing held in a sheet metal housing which is connected to the guide rail structure of the trolley assembly.
In drawings which illustrate embodiments of the invention, Fig. 1 is an isometric view showing a powered doox opening system of the present invention connected to a garage door.
Fig. 2 is a vertical cross-sectional view of one embodiment of an operator head assembly of the present lS invention joined to a trolley assembly of the present invention.
Fig. 3 is a horiæontal cross-sectional view o the operator head assembly shown in Fig. 2 highlighting the chain tension responsive devics.
Fig. 4 is a partial top plan view of the trolley assembly.
Fig. 5 is a partial cross-sectional side elevation of the trolley assembly shown in Fig. 4.
Fig. 6 is a bottom plan view showing the sprocket housing and chain tension responsive device of the trolley assembly.
Fig. 7 is a top isometric view showing the top panel of the operator head assembly with the drive shaft and locking bolts.
Fig. 1 shows a garage door 10 riding on a rail 11 having a counterweight spring system 12. A powered door opening system according to the present invention comprises a trolley assembly 14 and an operator head a~sembly 15.
Ceiling brackets 16 support the operator head assembly 15 from the ceiling of the garage ana the door end of the 3~
~LD
trolley assembly 14 is supported by a bracket 17 attached to the wall of the garage above the door 10. The trolley assembly 14 has a guide rail structure 20 with a trolley w~it 21 having a pivotal connection to a drawbar 22. The drawbar 22 is connected to a bracket 23 on the top portion of the door 10. There is generally provision provided to disconnect the drawbar 22 from the trolley unit 21 so that the door 10 can be operated manually. The counter-balancing system 12 permits easy opening and closing of the door without excessive force being necessary.
The trolley assembly 14 and the operator head assembly 15 are shown joined together in Figs. 2 and 3. The operator head assembly 15 has an electric motor 30 with a small V-belt pulley 31 driving a V-belt 32 to a large V-belt pulley 33. The large V-belt pulley 33 is connected to a threaded drive shaft 34 supported in a drive shaft housing 35 and has two threaded limit cams 36, 37 on the drive shaft 34 which move up or down dependent upon the direction of rotation of the drive shaft 34. Limit switches 38, 39 represent the open position of the door and the closed position of the door. Adjustment of the open and closed position of the door is made by rotating the threaded limit cams 3~ and 37 so the limit switches 3~, 39 are tripped at the correct position. The top of drive shaft 34 has a forked end 40 for connection to the trolle~ assembly 14.
The operator head assembly 15 is contained in a casing 42 with a sheet metal top panel 43 through which shaft 34 extends. The sheet metal panel 43 is used for assembling the operator head assembly 15 and the trolley assembly 14.
The electrical overload switches, operating switches, reversing relays and the like are all contained within the casing 42 and transparent covers 44 on each side of the casing 42 have light bulbs 45 therein to provide illumina-tion in the garage.
The trolley assembly 14 has at its drive end a - s -sheet metal sprocket housing 50 as seen in more detail in Figs.4, 5 and 6. The housing 50 is joined to the guide rail structure 20 and supports a drive sprocket 51 which in turn is connected to a chain drive 52 extending for the full length of the guide rail structure and having an idler sprocket (not shown). The idler sprocket is supported in bearings at the end of the guide rail structure 20. A trolley unit 21 as shown in Fig. 1 rides on the guide rail structure 20 and is connected to the chain 52 such that when the chain moves up and down the guide rail structure 20 the trolley 21 pulls the drawbar 22 thus opening or closing the door. The drive sprocket 51 is joined to bushing 54 which is supported by an antifriction bearing 56 entrapped by a sheet metal cover 57 and the bottom panel of the sprocket housing 50. The bushing 54 has a socket 58 at its base, and a pin 59 transverse to the soc3cet 58 which engages with the forked end 40 at the top of the drive shaft 34.
A tension responsive device 60 i9 provided adjacent the drive sprocket 51 and comprises a tongue 61 positioned between the chain drive 52, as shown in Fig. 4. The tongue 61 is connected to a slide 62 extending outwards both sides of the housing 50 beneath the chain drive 52. The slide 62 has a tension spring 63 and an adjustment screw 64 ~5 to adjust the tension for moving the tongue 61. As shown in Fig. 5, a tab 65 extends downward from the slide 62 and this moves when tension in the chain moves the tongue 61.
Thus in operation when the door is going down if it meets an obstruction the chain 52 becomes tensioned and the tongue 61 and slide 62 move a predetermined distance. The tab 65 extends through a slot 70 in the top plate 43 of the operator head assem~ly 15, as shown in Fig. 3, and contacts a limit switch 71 which when tripped activates a reversing relay to reverse the motor 30 so that the door proceeds to go back up again rather than continuing its downward move-ment. The adjustment screw 64 is used to adjust the spring63 to set the necessar~ tension so that when the door hits an object it reverses. This tension spring is needed dependent upon the weight of the door and the counter-balance spring for the door. Each door may well requirea different adjustment of this spring, and it can be arranged such that a mere feather touch on the door returns it upwards or alternativel~ a fairly heavy nudge is given to an object in the way of the door before it reverses.
Most doors have a rubber bumper strip on the bottom to protect any object in the way of a garage door to ensure scratches and the like do not occur on car surfaces and the like.
The top plate 43 of the operator head assembly 15 has the forked end 40 of shaft 34 protruding therethrough and three bolts 80 as illustrated in Fig. 7 to match with holes 81 in the sheet metal sprocket housing 50 of the trolley assembly 14. Slot 70 is positioned to allow the tab 65 of the tension responsive device 60 to pass throuyh and contact the limit switch mounted within the casing 42.
The ease of connection between the trolley assembly 14 and the operator head assembly 15 is a positive connection with the forked end 40 slipping into the socket 58 and engaging with the pin 59. Nuts ~not shown) are threaded onto bolts 80 to hold the top plate 43 of the operator head assembly 15 rigidly to the sprocket housing 50 of the trolley assembly 14. The drive connection is a positive one and has no separating forces as in the case of a pinion and gear connection. It is also self-locking as there is no tendency for the trolley assembl~ to separate from the operator head assembly, inasmuch as ~he operator head assembly is supported by the roof of the garage and the trolley assembly sits on the operator head assembly. All the electrics are includecl in the operator head assembly including thè limit switch for reverse operation in the ~2~1~3~
event that the door hits an ob~ect. This feature avoids the necessit~ of connecting electric wires together when the two assemblies are installed.
Various changes may be made to the scope of this invention which is limited only by the following claims.
SUPPLEMENTARY DISCLOSURE
It has now been found that an improvement can be made to the powered door opening system of the present invention which constitutes further embodiments. The drive shaft which engages the driving sproc]~et of the chain drive in the trolley assembly, may have one threaded limit cam thereon to move up and down the shaft dependent upon rotation of the shaft. This one cam has a circum-fexential groove therein, and a pivoted leuer is provided having a free end within the groove, which moves up and down the shaft with the cam. A contact tab on the lever contacts a first limit switch representing the open position of the door, and a second limit switch representing the closed position of the door.
In further embodiments two limit switches are provided to be tripped by the tab representing the open position of the door, and two limit switches are provided to be tripped by the tab representing the closed position of the door. Adjustment means are provided in a preferred embodiment to set the first limit switch and the second limit switch representing the open and closed positions of the door.
In drawings which illustrate the Supplementary Disclosure embodiments of the inventionr Fig. 8 is a partial side view of an operator head assembly showing a single threaded limit cam and a pivoted lever to contact limit switches representing top and ~, ., bottom positions of the door.
Fig. 9 is a sectional view taken at line 9-9 of Fig. 8.
Part o-f the operator head ~PTnhly 15 is shown in Fig.
8 with a threaded dxive shaft 34 supported in a drive shaEt housing 35. The drive shaft 34 has a forked end 40 on top and a V-belt pulley 33 at its lower end for connection to the motor (not shown). A threaded limit cam 85 is provided on the drive shaft 34 and has a cir-cumferential groove 86. The cam 85 is prevented from rotation by external grooves 37, one of which engages a vertical rib in the housing 35. The cam 85 moves up and down as the drive shaft 34 rotates. A pivoted lever 88 has a pivot 8~ held in the sides of the housing 35 and a free end 90 fitting in the circumferential groove 86 of the cam 85. A contact tab 91 extends from the lever 88 through an aperture in the housing 35 as shown in Fig. 9 and moves up and down as the cam 35 moves up and down.
A limit switch bracket 92 supports two limit switches 93 at the top with contact arms 94 which are contacted by the contact tab 91. Similarily two limit switches 95 are provided at the bottom o E the bracket 92 and have contact arms 96 which are contacted by the contact tab 91. A top adjustment screw 97 and a bottom adjustment screw 98 provides the positioning of the limit switches so they can be correctly positioned to represent open and closed positions of the door.
The two limit switches 93 and 95 are provided, one to stop the motor 30 and the other to disconnect the tension reversing control at the bottom so the door doesn't immediately start reopening. At the top, the second limit switch prevents the door from immediately closing by manual or radio operation, so it does not come down on a car as it is driving under the door~
POWERED DOOR OPENING SYSTEM
The present invention relates to a device to auto-matically open and close doors, more specifically to a powered door opening system for opening and closing garage doors for households, apartments and the like.
S Conventional garage door openers are generally shipped to a building site in a series of different com-ponents which require assembly on site. The assembly of these components often require a skilled installer and it is generally necessary to ensure proper alignment between the components to ensure that the system works satisfactor-ily. Furthermore, in the event of a problem occurring with one or more of the components of the garage door opening system it is necessary to either call in a skilled repairman or alternatively to remove the complete unit and r~turn it to the factory for repair.
The present invention provides a powered door opening system which comes in only two parts: a trolley assembly and an operator head assembly which may be mounted together by any householder or nonskilled person by merely slipping a shaft into a self locking socket and attaching three nuts. All the electrics are included in the operator head assembly. Furth0rmore, the unit may be purchased from a hardware store and installed by the house-holder himself. If a problem occurs with one part of the systemr then only that part need be returned for repair or replacement.
The powered door opening system of the present invention does no~ requir~ alig~ment from the motor drive mechanism to the trolle~ assembly but has a simple fork and pin joint that cannot ~e misaligned and is self lock-ing. No separatiny forces occur between the shaft and the socket. This distinguishes over such s~stems as that shown by Ellmore in U.S. Patent 4,231,191 which requires align-ment between a pinion of an operator unit and a gear of a chain drive system. Such a system always has a separat-ing force between the pinion and gear. It will also be appreciated that if there is misalignment between the pinion and gear, excessive wear may occur or, alternatively an inefficient drive system requiring excessive power is needed.
The present invention provides a powered door open-ing system including in combination: (a) a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail struct~re for slidable movement length-wise thereof, drawbar means pivotally connected to the trolley unit for connection to a door, chain drive extend-ing for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at th~
other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive means, located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain drive increases, (h) an operator head assembly comprising a casing containing a motor with speed reduction drive means to a drive shaft, the drive shaft having a threaded section with threaded limit cams thereon to move up or down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cams to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting withthe tab of the chain tension responsive means when the operator head assembly is joined to the trolley assembly/ the operator head ass~mhly containing all electrical circuitry, and tc) connector means for joining the trolley assembly and the operator head assembly comprising: a forked end on the drive shaft of the operator head assembly, adapted to fit into an engaging pin socket connecting directly to the 3~
driving sprocket of the chain drive in the trolley assembly, and including bolt means to hold the trolley assembly and the operator head assembly in joined relationship.
In the preEerred embodiment the engaging pin socket and the driving sprocket are supported by an antifriction bearing held in a sheet metal housing which is connected to the guide rail structure of the trolley assembly.
In drawings which illustrate embodiments of the invention, Fig. 1 is an isometric view showing a powered doox opening system of the present invention connected to a garage door.
Fig. 2 is a vertical cross-sectional view of one embodiment of an operator head assembly of the present lS invention joined to a trolley assembly of the present invention.
Fig. 3 is a horiæontal cross-sectional view o the operator head assembly shown in Fig. 2 highlighting the chain tension responsive devics.
Fig. 4 is a partial top plan view of the trolley assembly.
Fig. 5 is a partial cross-sectional side elevation of the trolley assembly shown in Fig. 4.
Fig. 6 is a bottom plan view showing the sprocket housing and chain tension responsive device of the trolley assembly.
Fig. 7 is a top isometric view showing the top panel of the operator head assembly with the drive shaft and locking bolts.
Fig. 1 shows a garage door 10 riding on a rail 11 having a counterweight spring system 12. A powered door opening system according to the present invention comprises a trolley assembly 14 and an operator head a~sembly 15.
Ceiling brackets 16 support the operator head assembly 15 from the ceiling of the garage ana the door end of the 3~
~LD
trolley assembly 14 is supported by a bracket 17 attached to the wall of the garage above the door 10. The trolley assembly 14 has a guide rail structure 20 with a trolley w~it 21 having a pivotal connection to a drawbar 22. The drawbar 22 is connected to a bracket 23 on the top portion of the door 10. There is generally provision provided to disconnect the drawbar 22 from the trolley unit 21 so that the door 10 can be operated manually. The counter-balancing system 12 permits easy opening and closing of the door without excessive force being necessary.
The trolley assembly 14 and the operator head assembly 15 are shown joined together in Figs. 2 and 3. The operator head assembly 15 has an electric motor 30 with a small V-belt pulley 31 driving a V-belt 32 to a large V-belt pulley 33. The large V-belt pulley 33 is connected to a threaded drive shaft 34 supported in a drive shaft housing 35 and has two threaded limit cams 36, 37 on the drive shaft 34 which move up or down dependent upon the direction of rotation of the drive shaft 34. Limit switches 38, 39 represent the open position of the door and the closed position of the door. Adjustment of the open and closed position of the door is made by rotating the threaded limit cams 3~ and 37 so the limit switches 3~, 39 are tripped at the correct position. The top of drive shaft 34 has a forked end 40 for connection to the trolle~ assembly 14.
The operator head assembly 15 is contained in a casing 42 with a sheet metal top panel 43 through which shaft 34 extends. The sheet metal panel 43 is used for assembling the operator head assembly 15 and the trolley assembly 14.
The electrical overload switches, operating switches, reversing relays and the like are all contained within the casing 42 and transparent covers 44 on each side of the casing 42 have light bulbs 45 therein to provide illumina-tion in the garage.
The trolley assembly 14 has at its drive end a - s -sheet metal sprocket housing 50 as seen in more detail in Figs.4, 5 and 6. The housing 50 is joined to the guide rail structure 20 and supports a drive sprocket 51 which in turn is connected to a chain drive 52 extending for the full length of the guide rail structure and having an idler sprocket (not shown). The idler sprocket is supported in bearings at the end of the guide rail structure 20. A trolley unit 21 as shown in Fig. 1 rides on the guide rail structure 20 and is connected to the chain 52 such that when the chain moves up and down the guide rail structure 20 the trolley 21 pulls the drawbar 22 thus opening or closing the door. The drive sprocket 51 is joined to bushing 54 which is supported by an antifriction bearing 56 entrapped by a sheet metal cover 57 and the bottom panel of the sprocket housing 50. The bushing 54 has a socket 58 at its base, and a pin 59 transverse to the soc3cet 58 which engages with the forked end 40 at the top of the drive shaft 34.
A tension responsive device 60 i9 provided adjacent the drive sprocket 51 and comprises a tongue 61 positioned between the chain drive 52, as shown in Fig. 4. The tongue 61 is connected to a slide 62 extending outwards both sides of the housing 50 beneath the chain drive 52. The slide 62 has a tension spring 63 and an adjustment screw 64 ~5 to adjust the tension for moving the tongue 61. As shown in Fig. 5, a tab 65 extends downward from the slide 62 and this moves when tension in the chain moves the tongue 61.
Thus in operation when the door is going down if it meets an obstruction the chain 52 becomes tensioned and the tongue 61 and slide 62 move a predetermined distance. The tab 65 extends through a slot 70 in the top plate 43 of the operator head assem~ly 15, as shown in Fig. 3, and contacts a limit switch 71 which when tripped activates a reversing relay to reverse the motor 30 so that the door proceeds to go back up again rather than continuing its downward move-ment. The adjustment screw 64 is used to adjust the spring63 to set the necessar~ tension so that when the door hits an object it reverses. This tension spring is needed dependent upon the weight of the door and the counter-balance spring for the door. Each door may well requirea different adjustment of this spring, and it can be arranged such that a mere feather touch on the door returns it upwards or alternativel~ a fairly heavy nudge is given to an object in the way of the door before it reverses.
Most doors have a rubber bumper strip on the bottom to protect any object in the way of a garage door to ensure scratches and the like do not occur on car surfaces and the like.
The top plate 43 of the operator head assembly 15 has the forked end 40 of shaft 34 protruding therethrough and three bolts 80 as illustrated in Fig. 7 to match with holes 81 in the sheet metal sprocket housing 50 of the trolley assembly 14. Slot 70 is positioned to allow the tab 65 of the tension responsive device 60 to pass throuyh and contact the limit switch mounted within the casing 42.
The ease of connection between the trolley assembly 14 and the operator head assembly 15 is a positive connection with the forked end 40 slipping into the socket 58 and engaging with the pin 59. Nuts ~not shown) are threaded onto bolts 80 to hold the top plate 43 of the operator head assembly 15 rigidly to the sprocket housing 50 of the trolley assembly 14. The drive connection is a positive one and has no separating forces as in the case of a pinion and gear connection. It is also self-locking as there is no tendency for the trolley assembl~ to separate from the operator head assembly, inasmuch as ~he operator head assembly is supported by the roof of the garage and the trolley assembly sits on the operator head assembly. All the electrics are includecl in the operator head assembly including thè limit switch for reverse operation in the ~2~1~3~
event that the door hits an ob~ect. This feature avoids the necessit~ of connecting electric wires together when the two assemblies are installed.
Various changes may be made to the scope of this invention which is limited only by the following claims.
SUPPLEMENTARY DISCLOSURE
It has now been found that an improvement can be made to the powered door opening system of the present invention which constitutes further embodiments. The drive shaft which engages the driving sproc]~et of the chain drive in the trolley assembly, may have one threaded limit cam thereon to move up and down the shaft dependent upon rotation of the shaft. This one cam has a circum-fexential groove therein, and a pivoted leuer is provided having a free end within the groove, which moves up and down the shaft with the cam. A contact tab on the lever contacts a first limit switch representing the open position of the door, and a second limit switch representing the closed position of the door.
In further embodiments two limit switches are provided to be tripped by the tab representing the open position of the door, and two limit switches are provided to be tripped by the tab representing the closed position of the door. Adjustment means are provided in a preferred embodiment to set the first limit switch and the second limit switch representing the open and closed positions of the door.
In drawings which illustrate the Supplementary Disclosure embodiments of the inventionr Fig. 8 is a partial side view of an operator head assembly showing a single threaded limit cam and a pivoted lever to contact limit switches representing top and ~, ., bottom positions of the door.
Fig. 9 is a sectional view taken at line 9-9 of Fig. 8.
Part o-f the operator head ~PTnhly 15 is shown in Fig.
8 with a threaded dxive shaft 34 supported in a drive shaEt housing 35. The drive shaft 34 has a forked end 40 on top and a V-belt pulley 33 at its lower end for connection to the motor (not shown). A threaded limit cam 85 is provided on the drive shaft 34 and has a cir-cumferential groove 86. The cam 85 is prevented from rotation by external grooves 37, one of which engages a vertical rib in the housing 35. The cam 85 moves up and down as the drive shaft 34 rotates. A pivoted lever 88 has a pivot 8~ held in the sides of the housing 35 and a free end 90 fitting in the circumferential groove 86 of the cam 85. A contact tab 91 extends from the lever 88 through an aperture in the housing 35 as shown in Fig. 9 and moves up and down as the cam 35 moves up and down.
A limit switch bracket 92 supports two limit switches 93 at the top with contact arms 94 which are contacted by the contact tab 91. Similarily two limit switches 95 are provided at the bottom o E the bracket 92 and have contact arms 96 which are contacted by the contact tab 91. A top adjustment screw 97 and a bottom adjustment screw 98 provides the positioning of the limit switches so they can be correctly positioned to represent open and closed positions of the door.
The two limit switches 93 and 95 are provided, one to stop the motor 30 and the other to disconnect the tension reversing control at the bottom so the door doesn't immediately start reopening. At the top, the second limit switch prevents the door from immediately closing by manual or radio operation, so it does not come down on a car as it is driving under the door~
Claims (6)
1. A powered door opening system including in combination:
(a) a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail structure for slidable movement lengthwise thereof, drawbar means pivotally connected to the trolley unit for connection to a door, chain drive extending for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at the other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive means, located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain drive increases, (b) an operator head assembly comprising a casing containing a motor with speed reduction drive means to a drive shaft, the drive shaft having a threaded section with threaded limit cams thereon to move up or down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cams to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting with the tab of the chain tension responsive means when the operator head assembly is joined to the trolley assembly, the operator head assembly containing all the electrical circuitry, and (c) connector means for joining the trolley assembly and the operator head assembly comprising a forked end on the drive shaft of the operator head assembly, adapted to fit into an engaging pin socket connecting directly to the driving sprocket of the chain drive in the trolley assembly, and including bolt means to hold the trolley assembly and the operator head assembly in joined relationship.
(a) a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail structure for slidable movement lengthwise thereof, drawbar means pivotally connected to the trolley unit for connection to a door, chain drive extending for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at the other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive means, located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain drive increases, (b) an operator head assembly comprising a casing containing a motor with speed reduction drive means to a drive shaft, the drive shaft having a threaded section with threaded limit cams thereon to move up or down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cams to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting with the tab of the chain tension responsive means when the operator head assembly is joined to the trolley assembly, the operator head assembly containing all the electrical circuitry, and (c) connector means for joining the trolley assembly and the operator head assembly comprising a forked end on the drive shaft of the operator head assembly, adapted to fit into an engaging pin socket connecting directly to the driving sprocket of the chain drive in the trolley assembly, and including bolt means to hold the trolley assembly and the operator head assembly in joined relationship.
2. The powered door opening system according to claim 1 wherein the engaging pin socket and the driving sprocket are supported by an antifriction bearing held in a sheet metal housing which is connected to the guide rail structure of the trolley assembly.
CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
3. A powered door opening system including in combination:
a) a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail structure for slidable movement lengthwise thereof, drawbar means pivotally connected to the trolley unit for connection to a door, chain drive extending for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at the other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive means, located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain drive increases, b) an operator head assembly comprising a casing containing a motor with speed reduction drive means to a drive shaft, the drive shaft having a threaded section with at least one threaded limit cam thereon to move up and down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cam to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting with the tab of the chain tension responsive means when the operator head assembly is joined to the trolley assembly, the operator head assembly containing all the electrical circuitry, and c) connector means for joining the trolley assembly and the operator head assembly comprising;
a forked end on the drive shaft of the operator head assembly, adapted to fit into an engaging pin socket connecting directly to the driving sprocket of the chain drive in the trolley assembly, and including bolt means to hold the trolley assembly and the operator head assembly in joined relationship.
a) a trolley assembly comprising a guide rail structure, a trolley unit supported on the guide rail structure for slidable movement lengthwise thereof, drawbar means pivotally connected to the trolley unit for connection to a door, chain drive extending for the length of the guide rail structure, having a driving sprocket at one end and an idling sprocket at the other end, the chain drive connected to the trolley unit to slidably move the trolley lengthwise on the guide rail structure, and chain tension responsive means, located on the guide rail structure adjacent the driving sprocket having a tab that moves as tension in the chain drive increases, b) an operator head assembly comprising a casing containing a motor with speed reduction drive means to a drive shaft, the drive shaft having a threaded section with at least one threaded limit cam thereon to move up and down the shaft dependent upon rotation of the shaft, and limit switches located to be triggered by the cam to indicate open position and closed position of the door, a tension reversing switch located in the casing for contacting with the tab of the chain tension responsive means when the operator head assembly is joined to the trolley assembly, the operator head assembly containing all the electrical circuitry, and c) connector means for joining the trolley assembly and the operator head assembly comprising;
a forked end on the drive shaft of the operator head assembly, adapted to fit into an engaging pin socket connecting directly to the driving sprocket of the chain drive in the trolley assembly, and including bolt means to hold the trolley assembly and the operator head assembly in joined relationship.
4. The powered door opening system according to claim 3 wherein one threaded limit cam moves up and down the drive shaft, the cam having a circumferential groove therein and a pivoted lever having a free end within the groove, the lever having a contact tab adapted to contact at least a first limit switch representing the open position of the door and at least a second limit switch representing the closed position of the door.
5. The powered door opening system according to claim 4 wherein two limit switches are provided to be tripped by the tab representing the open position of the door and two limit switches are provided to be tripped by the tab representing the closed position of the door.
6. The powered door opening system according to claim 4 or claim 5 including adjustment means to set the first limit switch and the second limit switch representing the open and closed positions of the door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000439399A CA1201136A (en) | 1983-10-20 | 1983-10-20 | Powered door opening system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000439399A CA1201136A (en) | 1983-10-20 | 1983-10-20 | Powered door opening system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1201136A true CA1201136A (en) | 1986-02-25 |
Family
ID=4126333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000439399A Expired CA1201136A (en) | 1983-10-20 | 1983-10-20 | Powered door opening system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1201136A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0460485A1 (en) * | 1990-06-06 | 1991-12-11 | MARANTEC ANTRIEBS- UND STEUERUNGSTECHNIK GMBH & CO., PRODUKTIONS OHG | Transmission for converting rotary into translational movement |
| CN107701011A (en) * | 2017-11-09 | 2018-02-16 | 无锡弗斯门控科技有限公司 | A kind of versatility device that can be adapted to c-type track and T-shaped track simultaneously |
| EP3601709B1 (en) * | 2017-03-24 | 2023-09-13 | Hörmann KG Antriebstechnik | Torque transmission device, door drive and door fitted with said device |
-
1983
- 1983-10-20 CA CA000439399A patent/CA1201136A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0460485A1 (en) * | 1990-06-06 | 1991-12-11 | MARANTEC ANTRIEBS- UND STEUERUNGSTECHNIK GMBH & CO., PRODUKTIONS OHG | Transmission for converting rotary into translational movement |
| EP3601709B1 (en) * | 2017-03-24 | 2023-09-13 | Hörmann KG Antriebstechnik | Torque transmission device, door drive and door fitted with said device |
| CN107701011A (en) * | 2017-11-09 | 2018-02-16 | 无锡弗斯门控科技有限公司 | A kind of versatility device that can be adapted to c-type track and T-shaped track simultaneously |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |