EP0805775B1 - Actuating means for a lift door catch - Google Patents
Actuating means for a lift door catch Download PDFInfo
- Publication number
- EP0805775B1 EP0805775B1 EP95942344A EP95942344A EP0805775B1 EP 0805775 B1 EP0805775 B1 EP 0805775B1 EP 95942344 A EP95942344 A EP 95942344A EP 95942344 A EP95942344 A EP 95942344A EP 0805775 B1 EP0805775 B1 EP 0805775B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- pivot
- actuating
- link
- link arm
- 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 - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
Definitions
- the invention relates to an actuating mechanism for a lift door catch in accordance with the preamble of claim 1, said catch blocking the lift door and preventing it from being opened, except when the lift cage is at the landing equipped with the lift door.
- the actuating mechanism of the invention is intended for demountable building hoists and for industrial applications.
- the release of the door catch usually is automatic, whereas the catch in building hoists in general is manually released by means of a particular actuating mechanism, which prevents the transfer of a release motion to the hoist door catch, if the hoist cage is anywhere else than at the landing in question.
- a connection is established between an actuating member and the hoist door catch, so that the door may be released by operating the actuating member.
- a plurality of actuating mechanisms for releasing a door catch of a lift cage have been proposed, among other things there exist actuating mechanisms including a cam wheel, which is engaged with a stationary cam provided at a landing. The door catch of the lift cage may then be released by the actuating mechanism provided at the lift cage.
- E.g. the GB-A-1 047 977 discloses an actuating mechanism of this kind. It comprises four bell cranks, two articulated levers, one link having one forked end, two links being forked in each end, one bevel gear unit and a plurality of springs.
- the system is very complicated, and furthermore it requires a careful assembly for bringing the components into their exactly correct positions, so that they will be able to cooperate in a satisfactory manner.
- the US-A-3 659 677 discloses an other type of mechanism.
- the actuating mechanism of this structure comprises a handle, which is rotated to release a gate lock for the cage of a hoist. Such rotation of the handle is possible only when a cam wheel engages a ramp, provided at each landing of the hoist. Otherwise the rotational movement of the handle is prevented by a stop.
- this system is less complicated than the above system, it comprises a plurality of particularly designed components, as well, e. g. including welded lugs, extensions and spring guides. This results in the structure being complex and expensive to manufacture.
- the US-A-3 721 319 exemplifies a further actuating mechanism, also having a rotatable handle, by means of which the catch of a lift door may be released.
- the system has a plurality of specially designed members, requiring a rather accurate manufacturing and assembly, making also this system comparatively expensive.
- the object of the invention is to provide an actuating mechanism of the kind described in the introductory part, which avoids the disadvantages of the prior art, and which has a rugged and uncomplicated construction, permitting it to be manufactured at an essentially lower cost than has been possible in the past, at the same time as a high reliability is maintained even after a long time of use.
- the actuating mechanism 1 of figs. 1 and 2 is intended for operating a catch 3 of a sliding door 4 of a hoist. Since the design of the door is quite unimportant for the invention per se, a closer description of the door will not be given herein.
- the catch 3 is provided at the top of the door opening, and extends above and along the door opening. It includes a knee lever 10, one arm 12 of which having a bore for a pivot 6, which is rigidly connected to the upper part of the door opening.
- the catch 3 is rotatable about the pivot 6 axis in the direction of the arrow P, said axis being parallell to the door 4.
- a vertical stop lug 8 is joined to the other arm (opposite to the pivot) of the knee lever 10 and protrudes into the path of movement of the door, closely behind the closed door 4 (or behind a stop member associated with the door). Furthermore, the catch 3 comprises a horizontal actuating surface 48 to be engaged by the actuating mechanism 1, which will be described more closely below. If the catch is rotated a sufficient angle about the pivot 6, the stop lug 8 will be displaced out of the path of movement of the door 4, permitting the door to be opened.
- the actuating mechanism 1 of the invention comprises a manual operating means of any appropriate type, not shown.
- an operating link 16 When the operating means is operated, an operating link 16 is linearly moved upwardly in the vertical direction (arrow L).
- the upper end of the operating link 16 has a yoke 18 provided with a through bore.
- the operating link 16 is guided in suitable guides 22, rigidly connected to the door 4, one of which being shown in the figures.
- a radial pin 24, rigidly connected to the link 16 protrudes radially therefrom.
- a return spring 26 is disposed about the link 16 between the radial pin 24 and the guide 22. The distance between the guide 22 and the pin 24 and the length and the characteristic of the spring are adapted to each other, so that the link 16 (and thereby the actuating mechanism 1) is biased by an appropriate return force.
- the lower end, having a through bore, of a first link arm 28 is inserted into the yoke 18 of the operating link 16, a pivot 20 extending through the bore of the yoke 18 and through the bore provided in the lower end 30 of the link arm 28.
- said link arm 28 is rotatable about the pivot 20 in relation to the link 16.
- the upper end of the first link arm 28 is forked, as well, and has a through bore for a pivot 34.
- the gap between the fork arms of the first link arm 28 is somewhat larger than the width of a cam wheel 36 to be placed in the space between the fork arms.
- the distance from the pivot axis of the bore to the bottom of the fork is larger than the radius of the cam wheel 36.
- a second link arm 38 comprises a lower yoke 40, in which the gap between the fork arms is somewhat larger than the width of the yoke 32 of the first link arm 28.
- This yoke 40 and the cam wheel 36 have each a through bore for the pivot 34.
- the yoke 40 of the second link arm 38 surrounds the yoke 32 of the first link arm 28, when assembled and by means of the pivot 34, which is introduced into the bores of the respective yokes 32, 34 and the cam wheel 36, the second link arm 38 may be pivoted about the pivot 34 in relation to the first link arm 28.
- the cam wheel 36 is rotatable on said pivot 34 and has such a radius that it protrudes outside the assembled yokes 32, 40 (fig 1).
- the upper end of the link arm 38 is flat and has a through bore for a pivot 42.
- the upper end of the link arm 38 is received in a yoke 44 of an actuating arm 46, which is linearly displaceable in the vertical direction (direction of arrow F), the second link arm 38 being pivotable about the pivot 42 in relation to the actuating arm 46.
- the arm 46 which at the upper end has a contact surface 48 engageable with the actuating surface 14 of the catch 3 for rotating the same, there are two guides 50 and 52 disposed above each other. Thereby the actuating arm 46 is movable in the vertical direction, only. Additionally, a stop member 54 is provided on the actuating arm 46, the abutment of which against the upper surface of the upper guide 52 limiting the downwards movement of the actuating arm 46.
- the link arms 28 and 38 are disposed to make an angle with each other in such a way that the pivot 34 will be located outside the connection line between the pivots 20 and 42 at a larger distance from the hoist door 4 towards the hoist cage than that of the pivots 20 and 42.
- the link arms 28, 38 and the pivots form a toggle joint mechanism.
- a cam 56 shown with broken lines in fig 1, is provided on the cage in such a manner that when the cage is at a landing or a stop level, the cam 56 will be opposite the cam wheel 36 in question.
- the device operates as follows:
- At least one sensor is provided to sense whether the catch 3 is in its blocking position or not. The sensor thereby interrupts the power supply to the driving motor of the hoist to prevent the actuation thereof, if the door is not correctly closed.
- the described embodiment is related to horizontally displaceable doors provided at landings.
- the actuating mechanism of the invention is applicable to side hung single or double doors, and to vertically displaceable doors, as well.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Elevator Door Apparatuses (AREA)
- Lock And Its Accessories (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
Description
Claims (6)
- An actuating mechanism for a catch (3) of a door of a hoist cage or of a landing, having a manually displaceable operating member (16), a vertically displaceable actuating member (46) connected to said operating member (16) by a coupling mechanism (20, 28, 34, 38, 42), and disposed to release said catch, thereby permitting the door (4) to be opened, when a hoist cage is at a landing, said coupling mechanism comprising a cam follower (36), which is engageable with a cam (56), normally spaced transversely to the vertical direction and disengaged from the cam follower (36), by displacing the operating member in a release direction, when the hoist cage is at a landing, the cam (56) and the follower (36) then being located in front of each other, thereby bringing the cam follower (36) into engagement with the cam (56) and blocking the coupling mechanism as a result in such a manner that further movement in the release direction of the operating member (16) will be transferred to the actuating member via the blocked coupling mechanism, whereas no movement of the operating member (16) will be transferred to the actuating member (46), when the cam follower (36) is out of engagement with the cam (56), characterized in that the operating member (16) and the actuating member are generally vertically aligned and connected to each other by a toggle joint mechanism (20, 28, 34, 38, 42), comprising a first link arm (28), which at one end via a first pivot (20) is connected to said operating member (16) and which at the other end via a second pivot (34) is connected to a first end of a second link arm (38), the other end of which being pivotably connected to said actuating member (46) via a third pivot (42) and in that the cam follower (36) is located at the second pivot (34).
- An actuating mechanism in accordance with claim 1, characterized in that said cam follower is a cam wheel (36), rotatably supported by said second pivot (34), which connects said first link arm (28) and said second link arm (38) to each other, said cam wheel (36) extending outside said link arms (28, 38) in the vincinity of said pivot (34).
- An actuating mechanism in accordance with any of claim 1 or 2, characterized in that said toggle joint mechanism is angled towards said cam (56) in such a manner that said cam follower (36) is the element, which is closest to said cam (56).
- An actuating mechanism in accordance with any of claims 1-3, characterized in that at least one of the pivot connections between said operating member (16) and said first link arm (28) and between said actuating member (46) and said second link arm (38) is a yoke (18, 44), provided on one of the link members and which surrounds one end of the other link member, a pivot (20, 42) being inserted through both of said cooperating link members (18, 28;38, 44).
- An actuating mechanism in accordance with claim 2, characterized in that the connection between said first link arm (28) and said second link arm (38) is formed by a yoke (40) provided on one of said link arms (38), which surrounds a thinner yoke (32) provided on the other of said link arms (28), said cam wheel being surrounded by said thinner yoke (32) and being rotatable on a pivot (34) extending through said yokes (32, 36).
- An actuating mechanism in accordance with any of claims 1-5, characterized in that said cam (56) is associated with a hoist cage and said cam follower (36) is disposed at a landing.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9404546A SE511787C2 (en) | 1994-12-28 | 1994-12-28 | Lift door locking mechanism |
SE9404546 | 1994-12-28 | ||
PCT/SE1995/001544 WO1996020126A1 (en) | 1994-12-28 | 1995-12-19 | Actuating means for a lift door catch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0805775A1 EP0805775A1 (en) | 1997-11-12 |
EP0805775B1 true EP0805775B1 (en) | 2000-07-12 |
Family
ID=20396503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95942344A Expired - Lifetime EP0805775B1 (en) | 1994-12-28 | 1995-12-19 | Actuating means for a lift door catch |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0805775B1 (en) |
AU (1) | AU689361B2 (en) |
DE (1) | DE69518013T2 (en) |
SE (1) | SE511787C2 (en) |
WO (1) | WO1996020126A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108584638A (en) * | 2018-05-14 | 2018-09-28 | 南通中尧特雷卡电梯产品有限公司 | A kind of left slow door skateboard component of door machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1188752A (en) * | 1915-03-31 | 1916-06-27 | Quinto Gavazzi | Mine-gate lock. |
US1352304A (en) * | 1919-05-06 | 1920-09-07 | Ernst E L Montelius | Door-lock |
GB1213689A (en) * | 1968-12-09 | 1970-11-25 | Ace Machinery Ltd | Improvements in and relating to cage gate lock mechanisms |
US3721319A (en) * | 1971-11-15 | 1973-03-20 | Ace Machinery Ltd | Hoists |
-
1994
- 1994-12-28 SE SE9404546A patent/SE511787C2/en not_active IP Right Cessation
-
1995
- 1995-12-19 AU AU43594/96A patent/AU689361B2/en not_active Expired
- 1995-12-19 EP EP95942344A patent/EP0805775B1/en not_active Expired - Lifetime
- 1995-12-19 DE DE69518013T patent/DE69518013T2/en not_active Expired - Lifetime
- 1995-12-19 WO PCT/SE1995/001544 patent/WO1996020126A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
SE9404546D0 (en) | 1994-12-28 |
DE69518013T2 (en) | 2001-03-22 |
WO1996020126A1 (en) | 1996-07-04 |
AU4359496A (en) | 1996-07-19 |
SE9404546L (en) | 1996-06-29 |
SE511787C2 (en) | 1999-11-22 |
DE69518013D1 (en) | 2000-08-17 |
EP0805775A1 (en) | 1997-11-12 |
AU689361B2 (en) | 1998-03-26 |
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