AU614103B2 - Improvements in electrically operated door mechanisms - Google Patents

Description

COMMONWEALTH OF AUSTRALIA 6 1 4 3 1 0 PATENTS ACT 1952-62 COMPLETE SPECIFICATION

(ORIGINAL)

FOR OFFICE USE: 6 j Application Number: Lodged: Complete Specification Lodged: Accepted: Published: Priority: Related Art: Class Int. Class Name of Applicant: Address of Applicant: Actual Inventor: Address for Service: TO BE COMPLETED BY APPLICANT AUTOMATIC ROLLER DOORS AUSTRALIA PTY. LTD 29 Jacobsen Crescent, Holden Hill, St-ae--f South Australia, cmmo"nwealth of Australia MILAN PERISIC Care of R.K. Maddern Associates, 345 King William Street, Adelaide, State of South Australia, Commonwealth of Australia Complete Specification for the invention entitled: "IMPROVEMENTS IN ELECTRICALLY OPERATED DOOR

MECHANISMS"

The following statement is a full description of this invention, including the best method of performing it known to me: us.

SPATENT, TRADE MARKS '92 12& DESIGNS SUB.OFFICE AO0892L 19/ 12/8 S19 DEC 1988 SOUTH AUSTRALIA FO n2z 2M 5B/O

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This invention relates to improvements in electrically operated door mechanisms, and it is particularly directed to safety release provisions whereby the door mechanisms can be manually operated in the case of electrical failure, or electrical breakdown.

The inventor herein was an inventor in the matter of the Australian Patent 520207 which described and claimed an improved electrically operated roller door 10. operating mechanism. In order to provide means whereby the door could be manually operated, there was provided a go 'locking pin designated 45 carried by a body 38 releasably coupled to a ring gear 35, the pin 45 comprising an outer tubular sleeve 48 housing an axial stem 49 engageable 15. within an aperture in the wall 37 of the ring gear By withdrawal of the pin, the ring gear was free to rotate, and this was an essentialelement of the device since in the case of electrical breakdown or electrical failure, it was necessary to be able to open or close 20. the door.

•This invention relates to further improvements in such a device, and has for its objects firstly a means which can be easily operated from a low level thereby avoiding the need to use a ladder for example to reach the pin, and secondly, a means which is sufficiently universal that it is also applicable to a chain operated door wherein an electric motor raises or lowers a door 2 by driving a chain, whether that door is of the roller door type or the tilt door type.

In an embodiment of this invention, a release device comprises an engagement block on the drive means, walls defining an aperture in the engagement block, a latch carrier, guide means guiding the latch carrier and the engagement block for relative movement, and a plunger pin releasably engageable with the aperture walls of the o oo engagement block to selectively complete or interrupt oO o 1 0. said drive means.

*see In the event of the invention being applied to a door of the type wherein a chain moves in a track, there is provided an engagement block having an aperture o therein which is engaged by the plunger pin, but when 15. disengaged, enables the chain to freely move whereby the o• door can be manually opened or closed.

An embodiment of this invention is described gig o hereunder in some detail with reference to and is illustrated in the accompanying drawings in which: ooOOO: S 20. Fig. 1 is a fragmentary side elevation of a chain track assembly forming portion of drive means between an electric motor (not shown) and a door, Fig. 2 is a section on plane 2-2 of Fig. i, Fig. 3 is a top view of Fig. i, Fig. 4 is a fragmentary perspective view of a plunger pin arrangement when the pin is in its disengage position, 3 Fig. 5 is a view similar to Fig. 4 but showing the plunger pin in its engage position, Fig. 6 is an "exploded" side elevation of the plunger pin arrangement, and Fig. 7 is an "exploded" fragmentary perspective view of a remote release control mechanism.

In this embodiment a release device 10 for an electrically operated door 11 (Fig. 1) is driven through drive means 12 by an electric motor (not shown) between 10. open and closed positions.

The drive means 12 comprise a chain 13 which carries g on it an engagement block 14 secured thereto by rivets (Fig. engagement block 14 having two ramp ends 16, and walls defining an aperture 17 intermediate those ends.

i .o The chain 13 is contained within a chain guide the chain guide 20 having upwardly facing channels 21 S surfaces of which form guide means for guiding a latch carrier 22, and the latch carrier 22 can be caused to 20. engage the engagement block 14 by a spring loaded plunger SI pin 23 engaging the walls of aperture 17. When so engaged the movement of the chain 13 causes corresponding Smovement of the latch carrier 22, and this is coupled to the door 11 by means of a link 24.

The remaining drive means is in accordance with known art, and the chain 13 moves between upper and lower limits in one of its traverses (the upper traverse of Figs. 1 and 2).

4 Reference is now made to the assembly which comprises plunger pin 23. This assembly comprises a body 27 having an aperture 28 therein (Fig. 6) which contains the plunger pin 23, the upper projecting end 29 of which extends upwardly from the body 27, but the pin 23 is normally urged downwardly towards its engagement position by means of spring In order to retain the plunger pin 23 in its release position shown in Fig. 6, there is provided a pivoted o 10. head 32 which pivots about pin 33 in the projecting

OO

end 29 of plunger pin 23, and one arm of the head 0* 32 can bear against the upper engagement surface of the oo flange 34 of body 27 as shown in Fig. 6. This movement is effected by means of a cord 35 which can be operated S'00 15. remotely as described below. If one end of cord 35 is S00" manually pulled, head 32 bears against flange 34 as said, withdrawing plunger pin 23, if the other end is pulled, head 32 resumes its Fig. 5 position and the plunger pin 23 can ride up a ramp face 16 and snap into aperture 17, thereby effecting re-engagement with the chain.

As shown in Fig. 7, a remote control station 38 on the door comprises a control knob 39 rotatable about a coupling sleeve 40 which is itself rotatable about a fixed boss. These three elements are concentric.

A pin 41 extends axially from the control knob 39 and a pin 42 extends axially from the coupling sleeve 5 i and if the knob 39 is rotated clockwise (Fig. 7) the pin 41 moves away from pin 42 and does not cause any rotation of sleeve 40. Cord 35 engages knob 39 at position 44 and in clockwise rotation, the cord moves to withdraw the plunger pin 23. This is convenient for the interior of a building, but withdrawal can also be achieved by means of a key 45 insertable from an external location, the key 45 being coupled to the sleeve 40 by means of a securing shaft 46.

Soo* 10. When the plunger pin 23 is withdrawn from aperture 0 n•o ,g 17, the latch carrier 22 does not move with the chain 0000 13 but moves with the door 11 which carl be easily raised or lowered. However when power is again available for example, the chain 13 can be power operated until the 9 15. plunger pin 23 again rides up over a ramp face 16 and reinserts into the aperture 17, as described above.

i The invention will be seen to be extremely simple but nevertheless provides firstly a remote control, isecondly a control which can be effected from inside S. 20. or outside of a building, and thirdly a control which is universal both for the ring gear type of operating mechanism (520207) or the lineal type of mechanism as Sdescribed herein.

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Claims (9)

1. A release device for an electrically operated door mechanism wherein a door is driven through drive means by an electric motor between open and closed positions, comprising an engagement block on the drive means, walls defining an aperture in the engagement block, a latch carrier, means coupling the latch carrier to the door, the latch carrier carrying a latch which comprises a plunger pin, carrier guide means guiding both the latch carrier and the engagement block for movement either in unison with one another or relative to one another, said plunger pin being releasably engageable with the aperture walls of the engagement block to selectively complete @000 *o o or interrupt said drive means to the latch carrier, and a •no• noo... plunger pin release cord extending from the plunger pin to actuating means on the door and operable to effect release of engagement of the plunger pin with the aperture walls.

2. A release device according to claim 1 further comprising a chain guide, said drive means comprising a chain ooooo S" guided for movement by the chain guide, said carrier guide 0000 S* o means being surfaces of the chain guide which flank the chain.

3. A release device according to claim 1 or claim 2 further comprising a plunger body, said plunger pin being slidable in the plunger body, and a spring co-acting between eoo the plunger pin and body urging the plunger pin towards a position of engagement with the aperture walls of the engagement block. 7

4. A release device according to claim 3 wherein said plunger body has an engagement surface, said plunger pin has a head, and a pin interconnects the plunger pin and head, the configuration and dimaensions of the body engagement surface and the plunger pin head being such that the head is rotatable between a first position wherein the head engages the body 0:00 engagement surface and prevents engagement of the plunger pin with the aperture walls of the engagement block, and a second position wherein the head does not engage the body and the OS "0 spring urges the plunger pin into engagement with those S. aperture walls.

A release device according to claim 2 or to claims 3 or 4 when dependent on claim 2, further comprising fasteners got* S which secure the engagement block to the chain.

6. A release device according claim 5 wherein the ends of the engagement block slope and comprise ramp surfaces over which the plunger pin may ride as the latch carrier and engagement block move relative to one another.

7. A release device according to claim 4 or to claims or 6 when dependent on claim 4, wherein said plunger pin release cord is attached to said plunger pin head and operable to effect said rotation thereof.

8. A release device according to claim 7 wherein said actuating means comprises a control station on the door and remote from the plunger pin head, a rotatable coupling sleeve at the station, means joining the cord to the coupling 8 sleeve, and a control knob also rotatable at the station and so coupled to the coupling sleeve as to be effective in rotating the coupling sleeve by rotation of the knob, thereby in turn effecting rotation of plunger pin head between the block engage and block disengage positions.

9. A release device according to claim 8 further comprising key and lock means associated with the control knob for in turn effecting said rotation of the plunger *log pin head upon release of the lock means by the key. A release device substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings. Dated this 19th day of December, 1988. AUTOMATIC ROLLER DOORS AUSTRALIA PTY. LTD. S By its Patent Attorneys, R.K. MADDERN ASSOCIATES S 0 9