Machine element or mechanism – Alternate manual or power operators
Patent
1989-06-22
1990-12-11
Wright, Dirk
Machine element or mechanism
Alternate manual or power operators
192114R, F16H 116
Patent
active
049761684
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to an improved drive for a door or gate operator and relates particularly, but not exclusively, to an improved door operator suitable for use in connection with roll-up or tilt-up type doors.
DESCRIPTION OF PRIOR ART
In the roll-up type door art, i.e. the art usually associated with garage type doors, it is a problem when an operator for the door is employed, that when the power is disconnected, the operator cannot be used. In these circumstances there has been provided a drive disengaging means so that the motor which is associated with the operator can be drive disconnected from the door. In these circumstances the door can then be opened manually. Reference is made to our Australian Patent No. 507,140 as one example of a prior art mechanism where the motor can be disengaged in these circumstances. One problem with many prior art types of motor releasing means is that the mechanism needed to permit releasing is quite complicated, expensive and bulky. This, in turn, inhibits the types of possible installations where an operator mechanism can be employed.
STATEMENT OF THE INVENTION
One aspect of the present invention attempts to overcome these problems.
Therefore, according to a first broad aspect of the present invention there may be provided an improved drive comprising a motor means and a drive gear box means, said drive gear box means having a drive disengaging means therein, said drive disengaging means being operable to permit drive engagement of said drive gear box means by being moveable in one direction and to permit drive disengagement of said drive gear box means when next moved in the same direction.
Most preferably the drive disengaging means is operable by an angularly rotatable indexing means, said movement in one direction being an angular movement thereof.
The angularly rotatable mechanism can be connected with chord means which terminates with a removable key barrel at a convenient user location adjacent a door to which the operator is to be attached. Thus, if the power should fail, a person can operate the lock barrel to withdraw it from its seat and by pulling displacement of the chord, can effect angular rotation of the indexing means to effect drive disengagement. Subsequent pulling can then restore drive connection.
BRIEF DESCRIPTION OF DRAWINGS
Detail of the present invention will be apparent from the following description of a preferred embodiment wherein:
FIG. 1 is a side view of an electric motor and a gear box for a roll-up door operator mechanism;
FIG. 2 is an exploded perspective view of the motor and gear box shown in FIG. 1;
FIG. 3 is a close-up exploded view of the left hand side of FIG. 2;
FIG. 4 is a close-up view of the right hand side of FIG. 2;
FIG. 5a is a sectional view through line 5--5 of FIG. 1 showing the motor and gear box in a drive engaged position;
FIG. 5b is a view similar to FIG. 5a but showing the motor and gear box in a drive disengage position;
FIG. 6 is a sectional view along line 6--6 of FIG. 5a;
FIG. 7 is a sectional view along line 7--7 of FIG. 5a;
FIG. 8 is a side view of the motor and gear box operatively interconnected with a roll-up door;
FIG. 9 is a sectional elevation along line 9--9 of FIG. 8; and
FIG. 10 is a view similar to FIG. 5(a) but taken along line 10--10 of FIG. 1.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring now to FIG. 1 there is shown a drive motor 1 such as an electric motor. Typically the drive motor 1 is a DC motor where the direction of rotation can be reversed by changing the polarity of the voltage supplied thereto. The output from the motor 1 is transferred to a drive sprocket 3 through a gear box 5 which houses a drive disengaging means (to be referred to later) which has an angularly rotatable indexing means (to be referred to later) which will effect drive disengagement and drive engagement of gears within the gear box 5. The indexing means can be operated by a chord 7. The chord 7 is attached to a key barrel (not shown) which, in turn, is positioned at a conveni
REFERENCES:
patent: 2454880 (1944-11-01), Michelman
patent: 2819628 (1958-01-01), Wardlaw
patent: 3134273 (1964-05-01), Wardlaw
patent: 3930422 (1976-01-01), Morimatsu
patent: 4034624 (1977-07-01), Bianchini
patent: 4285496 (1981-08-01), Coles
patent: 4392392 (1983-07-01), Perisic et al.
patent: 4452292 (1984-06-01), Leivenzon et al.
patent: 4472910 (1984-09-01), Iha
patent: 4519487 (1985-05-01), Florin
patent: 4562908 (1986-01-01), Zouzoulas
patent: 4706727 (1987-11-01), Leivenzon et al.
patent: 4741226 (1988-05-01), Bernard et al.
Hawkins Raymond R.
Karban George
Leivenzon Simon
Leivenzon Zvi
Lotznicker Lucio
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