US3758989A - Lift door - Google Patents

Lift door Download PDF

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Publication number
US3758989A
US3758989A US00212068A US3758989DA US3758989A US 3758989 A US3758989 A US 3758989A US 00212068 A US00212068 A US 00212068A US 3758989D A US3758989D A US 3758989DA US 3758989 A US3758989 A US 3758989A
Authority
US
United States
Prior art keywords
door
halves
vertical
channel
plane
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
Application number
US00212068A
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English (en)
Inventor
J Rompa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3758989A publication Critical patent/US3758989A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66B13/06—Door or gate operation of sliding doors

Definitions

  • ABSTRACT Lift door comprising an upper half and a lower half coupled for simultaneous, opposed, vertical sliding movement on one side only, the other side of said door halves being restrained in a direction normal to the door only.
  • a lift door comprises an upper half and a lower half coupled for simultaneous, opposed, vertical sliding movement on one side only, the other side of said door half being restrained in a direction normal to the door only.
  • My invention is based on the idea that the couples exerted by gravity on the means for guiding the vertical sliding movement at one side of the door halves can be absorbed by known types of guiding means without any special precaution, so that an operating and guiding means at the second side of the door halves is superfluous.
  • the invention provides a considerable saving of installing cost of the lift doors while it eliminates moreover the difficulty of exactly synchronising the operating means at both sides of the known lift door constructions.
  • a permanent illumination is provided behind the upper and- /or lower edge of the door opening such that the lift car will be illuminated after the door halves have been opened.
  • FIG. 1 is a schematic front view of an automatically operated lift door according to the invention.
  • FIG. 2 is a horizontal section of a lift door according to the invention.
  • FIGS. 3 and 4 are schematic views of the illumination with closed and opened doors respectively.
  • the lift door comprises an upper half 1 and a lower half 2, mounted above each other in the shaft of a lift and attached at their left side only to a vertical straight line bearing 3.
  • the bearing 3 comprises a vertical bar 4, connected to the door half and having a longitudinal groove 5, 6 at both side edges, which bar can slide in a channel section member 7 mounted in vertical position along one side of the door halves only.
  • the channel section member 7 has corresponding longitudinal grooves in both flanges directly opposite the grooves 5, 6 so that the pair of grooves and 8 and the pair of grooves 6 and 9 respectively together form raceways for a straight line of balls 10 or 11 respectively.
  • each door half I, 2 supports two freelyrotatable wheels 12 guided in a channel section member 13, mounted in vertical position in the lift shaft.
  • the door halves l and 2 are operated by a pneumatic cylinder 14 mounted vertically to the channel section member 7 of the straight line bearing.
  • the piston rod [5 of the cylinder 14 is directly connected to the upper door half 1 by a transverse member 16, whereas a cable 17 is attached to the member 16 and guided over a sheave l8 rotatably mounted at a certain distance above the upper door half 1, the other end of the cable being attached to a laterally extending part of the lower door half 2.
  • the pressure lines to the cylinder 14 are connected to an automatic control which increases the air pressure after the door 1, 2 is closed, so that it is not possible to separate the door havles l and 2 manually.
  • the door halves have a smooth front which does not provide a grip for the hands so that forced manual opening is prevented.
  • a fluorescent tube lamp 21 is mounted within a transparent horizontal casing 20 mounted behind the upper edge of the door opening.
  • the position of the lamp 21 is so chosen with respect to the lower and upper edges of the door half 1 in opened and closed position respectively that in open position of the door, the interior of the lift car 22 (which is then behind the door opening) is illuminated whereas in closed position of the door half 1 the lamp 20 illuminates the closed door opening and also the interior of the shaft, which may be useful for maintenance work.
  • An elevator door arrangement comprising:
  • guide means along the same vertical side of each of said door halves for permitting vertical sliding movement thereof but for restraining said door halves against both movement in a direction normal to the plane of the door and rotation of the door halves in the plane of the door, and
  • guide means along the opposite vertical side of each of said door halves for restraining said door halves only against movement in a direction normal to the plane of the door but not against rotation of the door halves in the plane of the door.
  • said guide means (c) includes a stationary vertical channel-section member with respect to which said door halves move, and a vertical bar attached to said one vertical side of each door half, said bar being slidable within said channel-section member, the sides of said bars and the flanges of said channel-section member being formed with opposed longitudinal grooves defining raceways between them, and straight rows of balls being located within said raceways.

Landscapes

  • Elevator Door Apparatuses (AREA)
  • Gates (AREA)
US00212068A 1970-12-29 1971-12-27 Lift door Expired - Lifetime US3758989A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7018980A NL7018980A (fr) 1970-12-29 1970-12-29

Publications (1)

Publication Number Publication Date
US3758989A true US3758989A (en) 1973-09-18

Family

ID=19811917

Family Applications (1)

Application Number Title Priority Date Filing Date
US00212068A Expired - Lifetime US3758989A (en) 1970-12-29 1971-12-27 Lift door

Country Status (9)

Country Link
US (1) US3758989A (fr)
BE (1) BE777243A (fr)
CH (1) CH538421A (fr)
DE (1) DE2163706A1 (fr)
DK (1) DK128888B (fr)
FR (1) FR2121082A5 (fr)
GB (1) GB1351329A (fr)
NL (1) NL7018980A (fr)
SE (1) SE374333B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7162835B1 (en) * 1998-12-01 2007-01-16 Tokyo Seimitsu, Co., Ltd Gravity safety door for an apparatus for manufacturing or inspecting semiconductors
US11052651B2 (en) * 2018-03-22 2021-07-06 Bobst (Shanghai) Ltd. Hot foil stamping device including a mobile window apparatus

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US630461A (en) * 1898-07-18 1899-08-08 David W Lloyd Sash-balance.
US1544751A (en) * 1921-10-13 1925-07-07 Joseph N Haynes Door opening and closing device
US1628346A (en) * 1926-03-13 1927-05-10 White William Walter Sash lock and counterbalance
US2989303A (en) * 1958-10-13 1961-06-20 Mercier Jean Actuating mechanism for sliding members
US3089203A (en) * 1960-08-22 1963-05-14 Otis Elevator Co Sliding door hangers and door
US3240926A (en) * 1964-04-03 1966-03-15 Francis A Hajnik Elevator anti-trip light
US3405782A (en) * 1966-11-25 1968-10-15 Westinghouse Electric Corp Elevator system
US3479498A (en) * 1967-03-16 1969-11-18 Sears Roebuck & Co Automatic closet light

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US630461A (en) * 1898-07-18 1899-08-08 David W Lloyd Sash-balance.
US1544751A (en) * 1921-10-13 1925-07-07 Joseph N Haynes Door opening and closing device
US1628346A (en) * 1926-03-13 1927-05-10 White William Walter Sash lock and counterbalance
US2989303A (en) * 1958-10-13 1961-06-20 Mercier Jean Actuating mechanism for sliding members
US3089203A (en) * 1960-08-22 1963-05-14 Otis Elevator Co Sliding door hangers and door
US3240926A (en) * 1964-04-03 1966-03-15 Francis A Hajnik Elevator anti-trip light
US3405782A (en) * 1966-11-25 1968-10-15 Westinghouse Electric Corp Elevator system
US3479498A (en) * 1967-03-16 1969-11-18 Sears Roebuck & Co Automatic closet light

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7162835B1 (en) * 1998-12-01 2007-01-16 Tokyo Seimitsu, Co., Ltd Gravity safety door for an apparatus for manufacturing or inspecting semiconductors
US11052651B2 (en) * 2018-03-22 2021-07-06 Bobst (Shanghai) Ltd. Hot foil stamping device including a mobile window apparatus

Also Published As

Publication number Publication date
CH538421A (de) 1973-06-30
NL7018980A (fr) 1972-07-03
DE2163706A1 (de) 1972-08-03
DK128888B (da) 1974-07-22
SE374333B (fr) 1975-03-03
BE777243A (nl) 1972-06-26
GB1351329A (en) 1974-04-24
FR2121082A5 (fr) 1972-08-18

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