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US3408959A - Folding staircase - Google Patents

Folding staircase Download PDF

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Publication number
US3408959A
US3408959A US655357A US65535767A US3408959A US 3408959 A US3408959 A US 3408959A US 655357 A US655357 A US 655357A US 65535767 A US65535767 A US 65535767A US 3408959 A US3408959 A US 3408959A
Authority
US
United States
Prior art keywords
staircase
tread
platform
vehicle
vestibule
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
US655357A
Other languages
English (en)
Inventor
Alan R Cripe
Walter C Caylor
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.)
RTX Corp
Original Assignee
United Aircraft Corp
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 United Aircraft Corp filed Critical United Aircraft Corp
Priority to US655357A priority Critical patent/US3408959A/en
Priority to BE718213D priority patent/BE718213A/xx
Priority to FR1578286D priority patent/FR1578286A/fr
Priority to SE09982/68A priority patent/SE334175B/xx
Priority to GB34807/68A priority patent/GB1194489A/en
Priority to DE1780007A priority patent/DE1780007C3/de
Priority to CH1110668A priority patent/CH491774A/de
Priority to NL6810466A priority patent/NL6810466A/xx
Priority to BR200872/68A priority patent/BR6800872D0/pt
Priority to ES1968157335U priority patent/ES157335Y/es
Application granted granted Critical
Publication of US3408959A publication Critical patent/US3408959A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D23/00—Construction of steps for railway vehicles
    • B61D23/02—Folding steps for railway vehicles, e.g. hand or mechanically actuated

Definitions

  • ABSTRACT OF THE DISCLOSURE A folding staircase for a passenger vehicle that converts from a platform in the vestibule of the vehicle to a pair of steps extending outwardly from the door of the vestibule and down to a station platform.
  • the convertible staircase pivots 180 around the vehicles doorsill by means of an arm and link mechanism to fold from the exterior stair position into the interior platform position.
  • This invention relates to a staircase for entering and leaving a passenger vehicle and more particularly to a convertible staircase that folds from a staircase position external of the vehicle into a platform in the vestibule of the vehicle.
  • One of the railway passenger-vehicle staircases of the prior art comprises a series of individually hinged steps that can be successively folded so that one or more of them can be extended for use.
  • This particular type of construction does not permit the staircase to be converted into a platform inside the vestibule when the staircase is not in use.
  • a construction of this type is shown in United States Patent No. 976,195.
  • Another of the railroad passenger cars of the prior art utilizes a secondary staircase that slides down over a fixed staircase, thereby covering any ice or snow thereon (United States Patent No. 1,397,294).
  • the secondary stairs When the secondary stairs are raised, they form a platform that becomes an integral part of the vestibule floor inside the car.
  • Another staircase device as shown in the patent to A. F. Paul, United States Patent No. 1,802,926, employs a trap door in the floor of the car vestibule that can be lowered into stair-forming position to enable passengers to pass in and out of the car from low-level platforms.
  • the stair treads move at the same time, but at different rates of speed so that they are simultaneously brought into the trap door forming position or into the stair-forming position.
  • the mechanism for raising, lowering or folding the stairs and converting them from platform to stairway position is unduly complicated and comprises a series of chain or pulley drives with associated linkages. All of these staircases are contained inside the passenger vehicle when converted from a platform to a stair-forming position, and none of them can be extended outwardly from the side of the train to rest upon a station platform. None of the staircases of the prior art suggestthe formation of 3,408,959 Patented Nov. 5, 1968 ICC an interior platform step that will aid la passenger in reaching a station platform at a higher level than the iloor of the passenger vehicle vestibule.
  • An object of the invention is to provide a passengervehicle staircase that extends outwardly from the vehicle vestibule at passenger stations having low level platforms and which converts into a platform inside the car in the vestibule for use at stations having high-level platforms.
  • a staircase which quickly converts from a platform step inside the vehicle and above the vestibule floor, into a set of stairs extending from the vestibule floor outwardly from the vehicle to rest on a low level station platform.
  • the convertible staircase of this invention When in the platform-step position, the convertible staircase of this invention forms a step above the vestibule oor of the vehicle so that passengers can ascend from the floor by way of the platform step, up and onto a high level station platform.
  • the convertible staircase is extended from the side of the car to permit exit to the low level passenger platform. Passengers descend directly from the vestibule floor, down the stair treads to the station passenger platform.
  • the botom tread of the stair is hingedly attached to its upper tread, and, therefore, the bottom tread is free floating and self adjusting, enabling it to rest rmly on low level passenger platforms that vary in height or with very low platforms to assume a position thereabove but normal height beneath the next higher step.
  • the invention accordingly provides a passenger vehicle staircase operated by a simple mechanism and one that can be utilized with great ease at passenger platforms above and below the level of the vehicle vestibule floor.
  • FIGURE 1 is a perspective view of a preferred embodiment of the invention showing the staircase in the extended position.
  • FIGURE 2 is a side view of the preferred embodiment of the invention and shows the convertible staircase Iin the stair-forming position.
  • FIGURE 3 is a side view of the invention showing the staircase converted into a platform step above the vestibule floor.
  • a staircase 10 comprises a lower tread 12, an upper tread 14, a lower riser 16, and an upper riser 18.
  • the top edge of riser 18 is riveted t0 a hinged member 20 (FIGURES 2 and 3) and is pivotally connected to the frame 21 of the vehicle door at points 22 (FIGURE 1) in the side 24 of a passenger vehicle.
  • FIGURES 2 and 3 a hinged member 20
  • the staircase 10 can be converted from the stair-forming position, 'shown in FIG- URES 1 and 2, to the platform-step position illustrated in FIGURE 3.
  • Two upper side frames 26 serve as supports for upper tread 14 and upper riser 18.
  • Each of these side frames 26 is rmly attached to tread 14 and riser 18 to form a single assembly that is riveted or welded to hinge 20.
  • the lower riser 16 is hingedly connected to the bottom of the upper riser 18 at point 28 (see FIGURE 2).
  • a lower side frame 30 is welded to each end of lower tread 12, as shown in FIGURES 1 and 2.
  • a supporting stop member'32 is welded to each of the side frames 30, as well as to the lower tread 12. In this way, side frames 30, support stops 32, and lower tread 12 form a single structure.
  • the upper side frames 26 and the lower side frames 30 are operatively connected by connecting arms 34 using pins 36. and 38.A Additionally, the rear portion of tread 12 is pivotally connected to the bottom portion of the riser 16 at point 40, more clearly seen in FIGURE 2. Because of the pivoting action just described about points 28, 36, 38 and 40, tread 12 is free to swing up and down in the horizontal plane. This type of construction gives thelower tread 12 considerable freedom in movement and also maintains the lower tread in parallel relationship to the upper tread 14 at all times. Therefore, staircase 10 is self adjusting to varying platform heights at different passenger stations.
  • FIGURES 2 and 3 the mechanism for converting the staircase 10 from the step-forming position to the platform step position is more clearly shown.
  • the staircase 10 pivots about points 22 (FIGURE 1) by the action of an arm 42 and a link 44 driven by a drive motor 46.
  • the arm 42 is fixedly attached to a rotatable gear 52 that is operatively connected to a drive motor 46 by a conventional chain or belt 54.
  • arm 42 comes to rest against a stop 56, which is fixedly attached to a brace 58 inside the framework of the passenger vehicle.
  • the vehicle has a vestibule floor 60 that extends to the edge of the car door, as illustrated in FIGURE 3.
  • support stops 32 rest against the top of the oor 60 to rmly support the treads 12, 14 and riser 16.
  • the horizontal platform step in FIGURE 3 comprises riser 16 and tread 12.
  • the frame member 62 forms an extension of the upper stair tread 16 and is attached thereto to form a continuation of the step platform between the outer surface 24 of the car and the forward end 64 of the platform step (see FIGURE 3).
  • Outside member 66 is attached to the end of frame member 62 and riveted onto hinge 20 thereby forming the outside surface of the vehicle when the staircase is converted from the step position to the platform position.
  • the passenger platform is at a lower level than the oor of the vehicle.
  • the conductor opens the door of the car and energizes motor 46 which, in turn, drives chain 54 and gear 52, thereby rotating arm 42 and connecting link 44 (FIGURE 3) counterclockwise.
  • the arm 42 and the link 44 extend outwardly through the open doorway carrying the convertible staircase 10 along therewith and down to the station platform level.
  • the staircase 10 passes through the doorway, it unfolds and the bottom tread 12 folds down along with the bottom riser 16.
  • the unfolding action stops when the upper ends 35 of connecting arms 34 come to rest against the bottom side of upper tread 14, thereby preventing the lower tread 12 from dropping further.
  • the free-floating action of tread 12 about pivot points 38 and 40 enables the staircase to adjust itself vertically to compensate for variations in station platform height.
  • Adjustable stops 56 are provided to regulate and stop the extension of arms 42 so that when the arms and staircase 10 are extended, as shown in FIGURE 2, rotation of the arms 42 and the staircase 10 will stop at a preselected position.
  • vthe conductor energizes drive motor 46 and the staircase 10 begins its clockwise rotation about hinge 20, folding into a platform step with the support stops 32 coming to rest on the vestibule lloor 60:
  • the microlimit switch 68 illustrated in FIGURE 3, is utilized to deenergize the motor 46, automatically, when the staircase 10 has been converted into the platformstep condition. As arms 42 pivot clockwise, the forward edge of one of the arms comes into contact with the switch 68 at point 70, thereby deactuating the motor 46. Similarly, microlimit switch 72 deenergizes motor 46, automatically, when staircase 10 has been converted into the stair position.
  • a staircase for a railway vehicle that converts from a platform position in the vestibule inside the vehicle doorsill to stair-forming position leading to a station platform which comprises:
  • connecting arm member pivotally connecting said lower and said upper treads at each end thereof and parallel to said lower riser and spaced therefrom, said connecting ⁇ arm member and said lower riser being free to pivot to orient said lower tread from a position coplanar with said upper tread to a'position parallel to but beneath said upper tread and carrying said lower tread attached thereto;
  • a staircase for a railway vehicle that converts from a platform-step position above the vestibule oor inside the vehicle doorsill to stair-forming position leading to a station platform which comprises:
  • treads a pair of stair treads separated by a lower riser and pivotally connected thereto, said treads comprising a lower tread and upper tread;
  • connecting arm member pivotally connecting said lower and said upper treads at each end thereof and parallel to said lower riser and spaced therefrom, said connecting arm member and said lower riser being free to pivot under said upper tread from a position coplanar therewith to a position parallel to but beneath in open position and carrying said lower tread attached thereto;
  • a staircase for a railway vehicle that converts from a platform-step position above the vestibule floor inside the vehicle doorsill to stair-forming position leading to a station platform which comprises:
  • treads a pair of stair treads separated by a lower riser and operatively connected thereto, said treads comprising a lower tread and an upper tread;
  • connecting arm member pivotally connecting said lower and said upper treads at each end thereof and parallel to said lower riser and spaced therefrom, said connecting arm member and said lower riser being free to pivot under said upper tread from a position coplanar therewith to a position parallel to but beneath in open position and carrying said lower tread attached thereto;
  • a rst side frame xedly attached to said upper tread and said upper riser at each end thereof;
  • said second side Iframe has a supporting stop member xedly attached thereto, said stop member acting as a support for the platform step and coming to rest on the vestibule floor when the staircase is converted and folded into the platform-step position.
  • a convertible staircase for a railway vehicle that pivots about the vehicles doorsill to fold from a stairforming position external to the vehicle into a platformstep position inside the vehicles vestibule and above the vestibule oor which comprises:
  • connecting arm member pivotally connected to said ear of said rst side frame and having its other end pivotally connected to the lower front edge of said second side frame, said connecting arm member and said lower riser being free to pivot under said upper tread from a position coplanar therewith to a position parallel to but beneath in open position and carrying said lower tread attached thereto;
  • pivoting linkage assembly operatively connected to said rst side frame at each end thereof;
  • pivoting linkage assembly comprises:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Ladders (AREA)
US655357A 1967-07-24 1967-07-24 Folding staircase Expired - Lifetime US3408959A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US655357A US3408959A (en) 1967-07-24 1967-07-24 Folding staircase
BE718213D BE718213A (es) 1967-07-24 1968-07-18
FR1578286D FR1578286A (es) 1967-07-24 1968-07-19
GB34807/68A GB1194489A (en) 1967-07-24 1968-07-22 Improvements in or relating to Staircases
SE09982/68A SE334175B (es) 1967-07-24 1968-07-22
DE1780007A DE1780007C3 (de) 1967-07-24 1968-07-23 Trittstufenanordnung für Eisenbahnfahrzeuge
CH1110668A CH491774A (de) 1967-07-24 1968-07-24 Trittstufenanordnung für Eisenbahnfahrzeuge
NL6810466A NL6810466A (es) 1967-07-24 1968-07-24
BR200872/68A BR6800872D0 (pt) 1967-07-24 1968-07-24 Novo tipo de escadas para vagoes ferroviarios
ES1968157335U ES157335Y (es) 1967-07-24 1968-07-24 Escalera plegable.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US655357A US3408959A (en) 1967-07-24 1967-07-24 Folding staircase

Publications (1)

Publication Number Publication Date
US3408959A true US3408959A (en) 1968-11-05

Family

ID=24628567

Family Applications (1)

Application Number Title Priority Date Filing Date
US655357A Expired - Lifetime US3408959A (en) 1967-07-24 1967-07-24 Folding staircase

Country Status (10)

Country Link
US (1) US3408959A (es)
BE (1) BE718213A (es)
BR (1) BR6800872D0 (es)
CH (1) CH491774A (es)
DE (1) DE1780007C3 (es)
ES (1) ES157335Y (es)
FR (1) FR1578286A (es)
GB (1) GB1194489A (es)
NL (1) NL6810466A (es)
SE (1) SE334175B (es)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572754A (en) * 1969-07-11 1971-03-30 Gen Motors Corp Vehicle step arrangement
US3580613A (en) * 1969-02-27 1971-05-25 Walter A Northrop Bumper combining hitch and step
US4124099A (en) * 1977-10-04 1978-11-07 General Motors Corporation Wheelchair lift device
US4124098A (en) * 1977-10-04 1978-11-07 General Motors Corporation Wheelchair lift device
US4174115A (en) * 1977-12-27 1979-11-13 Youngblood John W Motorized bi-fold stepwell cover
US4424751A (en) 1980-01-28 1984-01-10 Sig Schweizerische Industrie-Gesellschaft Entry stairs for vehicles
FR2669871A1 (fr) * 1990-11-29 1992-06-05 Renfr Systeme de marchepieds pour l'entree ou la sortie de vehicules.
US5230288A (en) * 1990-11-29 1993-07-27 Renfe Entering and exiting step system for vehicles with swingable platform for wheelchair bound passengers
US5505476A (en) * 1993-08-23 1996-04-09 Kwikee Products Co., Triple manual folding steps
US6213486B1 (en) * 1999-04-05 2001-04-10 Kwikee Products Co., Inc. Step assembly with concealed lower tread
US6578664B1 (en) * 2000-11-22 2003-06-17 Stuart Doherty Window guard with quick release latching system
US6863000B2 (en) 1999-07-08 2005-03-08 Aai Corporation Passenger rail car sliding door with high platform threshold
US20070277808A1 (en) * 2006-05-30 2007-12-06 Bean Patricia J Spark arresting incinerator
US20080099282A1 (en) * 2006-10-30 2008-05-01 Caterpillar Inc. Powered access device
US8075008B1 (en) * 2010-10-27 2011-12-13 Hwh Corporation Retractable staircase for a recreational vehicle
US8316595B2 (en) 2010-04-06 2012-11-27 Burford Tyrus S Collapsible staircase
US8668217B2 (en) 2011-12-15 2014-03-11 Michael P. Ziaylek Automated retractable step apparatus utilizing over-center locking mechanism
USD700977S1 (en) * 2012-06-23 2014-03-11 Spencer N. Carruthers Rail road platform safety apparatus
USD713772S1 (en) 2012-08-16 2014-09-23 Michael P. Ziaylek Automated retractable step apparatus utilizing over-center locking mechanism
US9957720B1 (en) 2015-11-25 2018-05-01 Majic Stairs Inc. Retractable staircase and method
CN109017844A (zh) * 2018-06-21 2018-12-18 中车株洲电力机车有限公司 一种脚蹬装置及具有该脚蹬装置的转向架
CN112590511A (zh) * 2020-12-29 2021-04-02 北汽福田汽车股份有限公司 车门组件和车辆
US20240083470A1 (en) * 2021-02-02 2024-03-14 Bode - Die Tür Gmbh Boarding system, having sliding footstep and active seal
US11945701B1 (en) 2020-11-13 2024-04-02 Majic Stairs Inc. Lift

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9220367D0 (en) * 1992-09-26 1992-11-11 Jones Garrard Limited Retractable stairs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US976195A (en) * 1910-05-12 1910-11-22 Roger W Lomax Folding car-step.
US1397294A (en) * 1921-11-15 Automatic raising and lowering steps
US1802926A (en) * 1929-11-08 1931-04-28 Nat Pneumatic Co Trapdoor and step control mechanism for passenger cars
US2564954A (en) * 1948-04-26 1951-08-21 David E Brelsford Retractable stairs
US2951454A (en) * 1957-04-08 1960-09-06 Pullman Standard Car Mfg Co Vehicle folding step assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397294A (en) * 1921-11-15 Automatic raising and lowering steps
US976195A (en) * 1910-05-12 1910-11-22 Roger W Lomax Folding car-step.
US1802926A (en) * 1929-11-08 1931-04-28 Nat Pneumatic Co Trapdoor and step control mechanism for passenger cars
US2564954A (en) * 1948-04-26 1951-08-21 David E Brelsford Retractable stairs
US2951454A (en) * 1957-04-08 1960-09-06 Pullman Standard Car Mfg Co Vehicle folding step assembly

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580613A (en) * 1969-02-27 1971-05-25 Walter A Northrop Bumper combining hitch and step
US3572754A (en) * 1969-07-11 1971-03-30 Gen Motors Corp Vehicle step arrangement
US4124099A (en) * 1977-10-04 1978-11-07 General Motors Corporation Wheelchair lift device
US4124098A (en) * 1977-10-04 1978-11-07 General Motors Corporation Wheelchair lift device
US4174115A (en) * 1977-12-27 1979-11-13 Youngblood John W Motorized bi-fold stepwell cover
US4424751A (en) 1980-01-28 1984-01-10 Sig Schweizerische Industrie-Gesellschaft Entry stairs for vehicles
FR2669871A1 (fr) * 1990-11-29 1992-06-05 Renfr Systeme de marchepieds pour l'entree ou la sortie de vehicules.
US5150659A (en) * 1990-11-29 1992-09-29 Renfe Entering and exiting step system for vehicles with two step pivotal support for accommodating platforms of varying heights
US5230288A (en) * 1990-11-29 1993-07-27 Renfe Entering and exiting step system for vehicles with swingable platform for wheelchair bound passengers
US5505476A (en) * 1993-08-23 1996-04-09 Kwikee Products Co., Triple manual folding steps
US6213486B1 (en) * 1999-04-05 2001-04-10 Kwikee Products Co., Inc. Step assembly with concealed lower tread
US7025004B2 (en) 1999-07-08 2006-04-11 Aai Corporation Passenger rail car sliding door with high platform threshold
US6863000B2 (en) 1999-07-08 2005-03-08 Aai Corporation Passenger rail car sliding door with high platform threshold
US20050076804A1 (en) * 1999-07-08 2005-04-14 Aai Corporation Passenger rail car sliding door with high platform threshold
US8028629B2 (en) 1999-07-08 2011-10-04 Aai Corporation Passenger rail car sliding door with high platform threshold
US8413591B2 (en) 1999-07-08 2013-04-09 Aai Corporation Passenger rail car sliding door with high platform threshold
US6578664B1 (en) * 2000-11-22 2003-06-17 Stuart Doherty Window guard with quick release latching system
US20070277808A1 (en) * 2006-05-30 2007-12-06 Bean Patricia J Spark arresting incinerator
US20080099282A1 (en) * 2006-10-30 2008-05-01 Caterpillar Inc. Powered access device
US8011474B2 (en) 2006-10-30 2011-09-06 Caterpillar Inc. Powered access device
US8316595B2 (en) 2010-04-06 2012-11-27 Burford Tyrus S Collapsible staircase
US8075008B1 (en) * 2010-10-27 2011-12-13 Hwh Corporation Retractable staircase for a recreational vehicle
US8668217B2 (en) 2011-12-15 2014-03-11 Michael P. Ziaylek Automated retractable step apparatus utilizing over-center locking mechanism
USD700977S1 (en) * 2012-06-23 2014-03-11 Spencer N. Carruthers Rail road platform safety apparatus
USD713772S1 (en) 2012-08-16 2014-09-23 Michael P. Ziaylek Automated retractable step apparatus utilizing over-center locking mechanism
US9957720B1 (en) 2015-11-25 2018-05-01 Majic Stairs Inc. Retractable staircase and method
CN109017844A (zh) * 2018-06-21 2018-12-18 中车株洲电力机车有限公司 一种脚蹬装置及具有该脚蹬装置的转向架
US11945701B1 (en) 2020-11-13 2024-04-02 Majic Stairs Inc. Lift
CN112590511A (zh) * 2020-12-29 2021-04-02 北汽福田汽车股份有限公司 车门组件和车辆
US20240083470A1 (en) * 2021-02-02 2024-03-14 Bode - Die Tür Gmbh Boarding system, having sliding footstep and active seal

Also Published As

Publication number Publication date
DE1780007A1 (de) 1972-01-05
SE334175B (es) 1971-04-19
FR1578286A (es) 1969-08-14
DE1780007C3 (de) 1974-03-21
BE718213A (es) 1968-12-31
DE1780007B2 (de) 1973-08-23
GB1194489A (en) 1970-06-10
ES157335Y (es) 1971-05-16
ES157335U (es) 1970-11-01
BR6800872D0 (pt) 1973-02-27
NL6810466A (es) 1969-01-28
CH491774A (de) 1970-06-15

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