AU601414B2

AU601414B2 - Rolling door drive assembly

Info

Publication number: AU601414B2
Application number: AU70946/87A
Authority: AU
Inventors: Mitchell John Billows; Richard Evan Jones
Original assignee: Byrne and Davidson Doors NSW Pty Ltd
Current assignee: Byrne and Davidson Doors NSW Pty Ltd
Priority date: 1986-04-15
Filing date: 1987-04-01
Publication date: 1990-09-13
Anticipated expiration: 2007-04-01
Also published as: AU7094687A

Description

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COMMONWEALTH OF AUSTRL 0 1 41 4 FORM PATENTS ACT 1952 C~ C) M P L E T E SPEC IF I CATION C 0 M P L E T E S P E C I F I C A T 1 0 N FOR OFFICE USE: Class Int.Class Application Number: Lodged: 7 oqW-6 /S7 Complete Specification Lodged: Accepted: Published: Priority: This document contains the amendments made undr Section 49 and is correct for printing I t a I I t *B it 0 w at a I 4 e 4 f o t l S14 e 4 Related Art: Name of Applicant: Address of Applicant: Actual Inventor: Address for Service: BYRNE

LIMITED

DAVIDSON DOORS PTY.

34-36 Marigold Street, Revesby, New South Wales, 2212 RICHARD EVAN JONES and MITCHELL JOHN

BILLOWS

(-SJELT.. Sy, y GIIELSTON WATERS, 55 C-larence St-r of, Sydney Complete Specification for the Invention entitled: "ROLLING DOOR DRIVE ASSEMBLY" p." The following statement is a full description of this invention, including the best method of performing it known to me/us:- 1 CAP of PH5471 dated 15 April, 1986 The present invention relates to an improved means for driving rolling doors. In particular, it provides an improved mounting system for securing the drive means to the door.

Rolling doors are well known and comprise a flexible door curtain which can be raised and lowered from a drum located above the door aperture. It is well known to employ a pair of end drums rotatably mounted on a fixed axle extending horizontally across the top of the door aperture. The curtain is secured at its upper end to each of the spaced end drums, one of which engages a ring gear which may be provided with a motor drive for rotating the drum and thereby raising or lowering the door.

CIII

It is well known to employ power drive units, with or Cott (4 without drive release means. One such prior art drive unit is *Ott disclosed in Australian Patent specification 519,424.

to A new and improved drive unit is described in our co-pending Australian Patent Application filed concurrently with this application and entitled "Releasable Drive Assembly" Serial No. 70947/87. The text of this co-pending application is incorporated herein by way of reference. The preferred embodiment of our co-pending application is identical to that described herein. The releasable drive assembly application of the prior art referred to claims a releasable drive assembly suitable for 0174j 2 -J c use with a rolling door comprising as a chassis, a final drive unit rotatably mounted to the chassis for operating the door.

A motor is fixed with respect to the chassis. It also has drive means interconnecting the motor with the said. final drive unit with the said drive means including a clutch for releasing and re-engaging the motor and the final drive unit. The clutch includes a slidable clutch unit keyed for rotation with one part of the drive means and having axially projecting formations respectively engagable and disenga-gable with mating formations on the other part of the said drive means upon sliding movement of the clutch unit. The assembly also has a latchable disengagement means for selective engagement with the 0 e 4 *oo slidable clutch unit for sliding the clutch unit into and out of engagement with the said mating formations. The o0 ,io- disengagement means is latchable to hold the clutch unit in its 0 ao 4, disengaged position.

owa However, that application is directed primarily to the drive means itself and its drive release features, while the present application is directed primarily to its improved mounting aspects o 4 4 S A I 1 -b 0017j/KW -2a

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_I ~Y -i~i i-Il -_l__ll-Y111~ L The prior art unit described in Australian Patent specification 519,424 is mounted directly to the fixed axle by means of opposed clamp jaws. It was important to ensure that the unit was very securely clamped in order to avoid relative rotation.

The prior art unit also required a relatively large amount of clear space at the side of the door. This frequently meant that the unit could not be used in cases of reduced side clearance. It was also not readily adaptable to right and left hand installations and was not easily fitted to existing doors.

o 99 It is an object of the present invention to provide o999 eo ~a rolling door drive assembly which is adapted for use in .99o o 99 o0o cases where the above-mentioned prior art unit would have o° been excluded by reduced side clearance.

It is an object of a preferred embodiment of the invention to provide an assembly which can be readily 9 9 '4 4 fitted to either end of a rolling door.

According to the invention there is provided a 0;t 20 rolling door drive assembly comprising a chassis, a final drive unit rotatably mounted to said chassis for operating said door, a motor fixed with respect to said chassis, drive means interconnecting said motor and id 1final drive unit, housing means defining a mountin9 channel on said assembly remote from said final drive unit, said mounting channel extending transversely to the axis of rotation of said final drive unit and adapted to receive part of a mounting bracket, mounting means 3

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extending into said mounting channel in a direction parallel to said axis for engagement with said part of said mounting bracket.

Preferably, the drive means includes a clutch for releasing and re-engaging the motor and the final drive unit, handle means being provided for manually operating the clutch, the housing means defining a handle channel extending at right angles to both the mounting channel and the axis, at least part of the handle channel being adapted to receive the handle means for movement within the handle channel.

In a further preferred form of the invention the handle 0 means includes a hand grip unit which is removable from the uQoo o- assembly or at least rotatable out of register with the handle 0000 00°:o channel, thereby permitting access to the mounting means along ~the handle channel.

0 00 The housing means and chassis may be separate or integral. Preferably, the mounting means is integral with the chassis.

0000 In its broadest form the present invention comprises an 0000 00°of improvement in a rolling door drive and mounting assembly of 00 the type comprising a chassis, a final drive unit rotatably mounted to the chassis about an axis of rotation for driving connection to a door for rolling the door about a door mounting axle, a motor fixed with respect to said chassis and drive means interconnecting said motor and said final drive unit; the improvement comprising: a housing means enclosing at least part of the drive assembly; -4- 0174j f KV

V

a recessed channel in said housing means at a location opposite a ring gear associated.with the final drive unit and adapted to receive at least a part of a mounting bracket which protrudes into the recessed channe l for mounting the assembly adjacent the door axle; and mounting means integral with said housing and extending outwardly from the recessed mounting channel of the housing in a direction parallel to said axis of rotation of the final drive unit for receiving and supporting the mounting axle of the roller door and for attachment to said load bearing part of said mounting bracket in said channel.

A preferred embodiment of the invention will now be accompanying drawings in which: Figure 1 is a perspective view of a drive assembly according to the invention; Figure 2 is a side elevation of the drive assembly shown a in figure 1; Figure 3 is a front elevation of the assembly shown in figure 1; il II 44a 04- 4a 0174j Lc /i ~_LI Figure 4 is a rear elevation of the assembly shown in Figure i.

Figure 5 is a plan view of the assembly shown in Figure i.

Figure 6 is an underside view of the assembly shown in Figure i.

Figure 7 is a cut-away front elevation of the assembly, showing it attached to a mounting bracket; Figure 8 is a sectional side elevation taken on line 8-8 of Figure 7, showing the assembly attached to a rolling door.

Figure 9 is an enlarged view of part of the assembly shown in Figure 8.

Figure 10 is a perspective view of a hand grip unit; Figure 11 is a plan view of the hand grip unit shown in Figure Figure 12 is an underside view of the hand grip unit shown in Figure Figure 13 is a rear view of the hand grip unit shown B 20 in Figure Figure 14 is a front view of the hand grip unit shown in Figure Figure 15 is a side view of the hand grip unit shown in Figure Figure 16 is an opposite side view of the hand grip unit shown in Figure Referring initially to Figure 8 of the drawings, the rolling door drive assembly 1 is shown attached to a (~11~-LILLLI rolling door 2. The rolling door 2 includes a flexible door curtain 3 which can be raised or lowered from a drum 4 located above the door aperture. The drum 4 is defined by a pair of end drums 5 of which only one is shown. The end drums are rotatably mounted on a fixed axle 6 extending across the top of the door aperture. The axle is secured at its opposite ends to mounting brackets 7 by means of U-bolts 8 and locking nuts 9.

The drum 4 is rotated by a ring gear 10 which engages the end drum 5 and forms the final drive unit of the drive assembly.

Referring more particularly to the drive assembly itself, this includes a chassis 11 which rotatably supports the ring gear 10 for rotation about axis 12.

The chassis is rigidly secured to the mounting bracket 7 by a projecting mounting lug 15 which is sandwiched between the bracket 7 and axle 6 by U-bolt 8. The mounting lug 15 has a flat base 16 for non-rotatable locking engagement with the top flange 17 of the mounting 20 bracket 7. The mounting lug 15 also includes axially extending elongate slots 18 for adjustably receiving the U-bolt 8.

The chassis also supports an electric motor 20 and a drive means 21 which includes a gear train 22 and a clutch 23 for releasing and re-engaging the motor 20 and the ring gear 10. Drive disengagement is effected by a handle 24 which includes a removable hand-grip portion The hand-grip is illustrated in particular detail in -6- Figures 10 to 16. Downward movement of the handle into a latched position disengages the drive by actuation of the clutch 23 in a manner described in detail in our co-pending application. The handle is spring loaded into an upper position of drive re-engagement which is effected either by sliding the hand-grip portion to the left in Figure 7 or by a preferred form of automatic re-engagement upon actuation of the motor Returning to features more particularly related to the present invention, the drive assembly includes a housing 28 which is stepped inwardly to define a mounting channel 29 extending transversely of the axis 12 and located on the opposite end of the assembly from the ring gear 10. The mounting channel 29 is adapted to receive the top flange 17 of the mounting bracket 7 as best shown in Figure 8. The mounting lug 15 extends into the mounting channel in a direction parallel to the axis 12 in order to engage the mounting bracket flange 17 as described above.

This arrangement enables the assembly to fit very closely against the mounting bracket as shown in Figure 8. This permits the unit to be installed in situations where there would be inadequate side clearance for known devices, such as the prior art unit described in Australian specification 519,424 mentioned above. The improved width saving is of the order of the axial width of the mounting bracket. Where necessary, the projecting mounting lug and axle can be cut off flush with the edge 7 of the mounting bracket and need not protrude as shown in Figure 8.

Preferably, the mounting lug 15 is integral with the chassis and the housing is formed as a separate, removable unit. In other embodiments the housing may be integral with the chassis.

In a preferred form of the invention, the housing also defines a handle channel 30 which extends at right angles to both the mounting channel 29 and the axis 12.

The hand grip unit 25 nests within the lower portion 31 of the handle channel 30 for movement therealong.

Preferably, the handle channel is centrally located as shown. This permits the drive assembly to be used in both left hand and right hand installations.

The housing 28 also includes a removable translucent lamp housing 32 which defines the lower portion 31 of the handle channel 30. Upon removal of the lamp housing 32, the hand grip unit 25 can be removed from the handle shank by rotating the hand grip about its bayonett mounting stub 33 from which it can then be downwardly withdrawn.

With the hand grip unit removed or at least rotated out of register with the handle channel 30, easy access is provided to the mounting bolts 9 for situations of reduced side clearance where it would otherwise be awkward to reach the nuts.

The housing also includes upper and lower vents and 36 respectively for ventilating indicator lamps 37.

8 The mounting channel 29 assists this ventilation.

Although the invention has been described with reference to a specific example, it will be appreciated by those skilled in the art that the invention may be embodied in many other forms.

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Claims

2. The improvement in a rolling door drive and mounting assembly accozding to claim 1 further including a clutch for releasing and reengaging said motor and said f.nal drive unit, handle means for manually operating said clutch, said housing means defining a handle channel extending at right angles to both said mounting channel and said axis, at least part of said handle channel being adapted to receive said handle means for 4 .movement within said handle channel. j
3. The improvement in a rolling door drive and mounting assembly according to claim 2 wherein said handle channel is centrally located to intersect said axis, thereby to permit said assembly to be used in both left hand and right hand installations.
4. The improvement in a rolling door drive and mounting assembly according to claim 3 wherein said handle means includes a hand grip unit which is movably attached to the handle means for improvement out of register with said handle channel, thereby permitting access to said mounting means along said handle channel. The improvement in a rolling door drive and mounting assembly according to claim 4 wherein said grip unit is removably mounted to said handle means with a bayonet connection.
6. The improvement in a rolling door drive and mounting assembly according to claim 5 wherein said mounting means comprises a mounting lug, said lug being integral with said chassis. 0174j 11a