US2624081A - Elevator shaft door - Google Patents

Description

Jan. 6, 1953 J. A. SCHWEIG ELEVATOR SHAFT nooa 2 SHEETS--SHEET 1 Filed March 27, 1947 g INV ENTOR.

. HIS ATTORNEYS.

J. A. SCHWEIG ELEVATOR SHAFT DOOR Jan. 6, 1953 2 SHEETS-SHEET 2 Filed March 2'7, 1947 g x l I l /t l l 1 1 l l I l ll ll m a W O I 'IIII\ l/ f III v E \LR. I

Iv 2 8v L z FIGS.

HIS ATTORNEYS.

Patented Jan. 6, 1953 .'-'This inventionrelates-tos-elevator shaft doors rof the kind wherein-two Nertically sliding *door H-sections are connected by =-counterbalanci-ng chains for simultaneousw-movementtowards and. away'f-rom each other-to close-and open-the door space; and the lower door section is --provided with. r a latching device which prevents -joint opening movement of both door-sections but does not pre- :-:-vent the upper: doorsection--from being-opened independentlyof-'= the positively locked lower door section. 'The'presentinvention has for its; -principal=objects to provide a-separate latching device for the upper-doorsection; 't proVide-mean cOn trolled by the lower door section for engaging-said latchingdevice and for releasing -said latching means when the lower doorsectionstarts;toopen; andto provide when thelower doorsectiorrcloses for-simplicity and cheapness ;of-;constructi on and compactness-oi design.

The invention consists in -the elevatorgpshaft door constructionandin'the parts and combinations and-arrangements 'of parts heIinaiter de-- scribed and; claimed.

In the accompanying drawings; hich iorm part'oi this specification; and whereinj'like; symz o s 'to like parts wh r v t i r occur,

Fig. l is a shaftside elevational view" vator shaft door construction empody l ng my in ---;vention, M

"Fi 2 s an ars dyt eamsni r haft sid elevati n l ii t are io i f;illeloslsi a $1 -vice,

Fig; 3 is averticalsectional'y-iew on the line 3+3 in Fig.2,

:"f-E s 5 c a V i.- m.- l r., t F -:2; sh win a modifiedform of the inventionpand P a-6 is oriz ntal c i na .Yiew-pnthel n 6+6 in'lfig. 5.

"In the accompanying drawin s, my; invention is shown embodied in a yertical'sliding, eenterp in t anced? q constr ctio in u d i c osi a he do r spaceorp e mo in a el v t r. shaft; e d o r. so i tmetio mp es v rtica l slidin l p-p r. a d. w rdop s c on and Mesnecfiveln. eaohn v dedzalon each v r c l e e with. mang e. har .s s a l, 3 7 h vi g. an ut a din flange s s ati y. arrange between an upright double angle bar door guide 4 rigidly secured to" the adjacentjamb member of the door frame. A guide-shoe 6 is fixed-to the outstanding flange 'ofthe angle-bar side rail 3 and straddles one fiange of thedoubleangle bar door guide 4.

chweigsfllay om tM ,-a s gn r:,-to S e nan ast- Lou a of- Missouri pplicat ion lvlarch 27, 1M7 Serial No: 737,581

Theupper and lower-door-sections .'l and Z-are ecounterbalanced by means of-schains I that are connected, as at 8; to thelower cornersvof the upper'door section. The chains [extend up- :wardly around. sheavesbar door guides 4 and 9 mounted on-the angle thencedownwardly. in :the direction of the lowerdoorsection 2 where they are connected to the upperends of upright chain beyond the side edges of .rods Ill Whose lower ends are secured to the outer ends of door arms II that project horizontally said lower door-sections.

Byithis arrangement, each door section acts as a w counterbalance for-the other door section-,where- .-.-down:on --thelower door section 2 or by pushing thedoor may be-easi1y opened by vpushing up on the upper doorsection I.

iThe door is. provided witha. latching device comprising an operating lever. i'Z Which is pivotally mounted on the shaft side of the. lower door section 2-,-and-oppositely extendinghorizontal latch bars -|3-pivotally=connected-at their inner a-ends'to the: respective upper and lower arms of said operating lover. The latch bars|3 are slidably supported on the ange tached at --one= end :to one -of--the arms ofthe lower doorsection 2-for sliding movement into and out of engagement with-suitable catches 1 M -fixed to the-double anglebar door guides 4.- A-coil spring 15 is atclever l2 and at its other endto a'lug -15 on the shaft side of the-lower doorsection 2', the parts --.,-being .arranged-so-that the springtends to prouject --the-latchtbars into latching position.

rflromvthe construction thus far described'it .i-willibeseen that the. latching device on the lower 1;:doorv section- -,prevents both 1 door- I sections from .opening in unison; but said devicedoes not prevent the upper door section from being opened --independentlyoi the locked lower doo-risectionby ;-li-fting -.the;;dead weight of the-upper door section.

l-Inorder to prevent the upper door section from nbei-ng separately openedwhen both sections are "locked against joint opening movement, theupper door section is provided: with a separate latching imechanism that will'positively lock the upper doorssection. when the lower door section closes and will unlock the-upperdoor section when the ..lo.wer doorsection opens.

" The separate automatic latching device for the oupper door section 2 comprises an upright latch -ba1 -door guide t-for verticalswinging movementz lever I1 .pivotally supported onone-or each angle towards and away from the projecting portionof the:- door arm 'I l --on the-adjacent upper corner of othelower: door section -l and the projecting por- :tion of a door-plate lii that is; secured -flatwise to the shaft side of said upper door section and extends horizontally beyond the side edge thereof near the lower corner thereof. The upright latch lever I! is rotatably supported intermediate between its upper and lower ends on a horizontal pivot stud 19 that is fixed to one flange of an upright angle bar 26, which flange is secured by bolts 2| to the outstanding flanges of the double angle bar door guide 4. The upper arm of the latch lever I! terminates in a detent which is part of the lever. The detent, in this form, is a hook-shaped upper end portion 22 adapted to overhang the door plate IS on the upper door section, and the lower arm of said lever terminates in a cam surface 23 that inclines downwardly and outwardly away from the opposing face of the door arm I I of the lower door section. A coil compression spring 24 is sleeved on a horizontal pin 25 fixed to the angle bar 26 with one end seating thereagainst and with the other end seating against the lower arm of the latch lever H.- The spring 24 serves to swing the cam-shaped lower arm of the latch lever towards the door arm H of the lower door section and the detent or hooked upper end 22 of said lever clear of the door plate 48 on the upper door section.

When the door is closed, the door arm ll of the lower door section engages the cam surface 23 on the lower arm of the latch lever H and thus swings the fixed detent or hooked upper end 22 of said lever over the door plate 18 on the upper door section, thereby preventing the upper door section from being opened when the lower door section is closed' As shown in the drawings, thehook portion 22 of the latch lever ll is spaced above the plate It on the upperdoor section in the fully closed position of the lower door section so as to permit opening movement of the upper door section with the lower door section until the lower door section has moved downwardly far enough to release the lower arm of the latch lever and permit the hooked upper end thereof to swing clear of the plate on the upper door section.

By the arrangement described, the upper door section is automatically locked when the lower door section is locked by means 12, I3 and M. The conventional latching device on the lower door section prevents simultaneous opening movement of the upper and lower door sections. At the same time, the separate latching means for the upper door section prevents said section from beingopened independently of the closed lower door section. The latching device for the upper door section is moved to lockingposition by the closing movement of the lower doorsection; and the upper door latching device is moved by the spring 24 to unlocking position when the lower door section starts its opening movement.

In the modified form of my invention illustrated in Figs. and 6, the latching mechanism for the upper door section [comprises a detent in the form of a separate bolt 26 that is mounted for axial sliding movement in a plate 21 that is secured by means of bolts 23 to the outstanding flange of the double angle bar door guide 4. The detent or bolt 26 is slidable crosswise of the double angle bar door guide 4 and is adapted to move into and out of a detent abutment, which. is, in this case, the path of movement of the guide shoe 6 fixed to the angle bar side rail 3 of the upper door section,

The bolt 26 is reciprocated by means of a bell crank lever that is pivotally secured, as at 30, to the plate 21 for vertical swinging movement towards and away from the outstanding flange of 4 the double angle bar door guide 4. One arm of the bell crank lever 29 extends upwardly and terminates in a bifurcated or forked upper end portion 3| that straddles a transversely grooved portion 32 of the bolt 26. The other arm of the lever 29 terminates in a bifurcated or forked end "portion 33 that straddles the vertical chain rod the chain rod [0. In the closed osition of the upper and lower door section, the underside of the chain rod engaging arm of the bolt operating lever 29 is engaged by a coil compression spring 34 which swings said lever in a direction that will slide the bolt 26 across the top of the guide shoe 6 on the upper door section and thus prevent the latter from being opened. The spring 34 is sleeved on I0 and seats on the upper end of a sleeve that is also sleeved on said rod and seats on the door arm II ofthe lower door section. A

coil compression spring 35 is also interposed between the bolt engaging arm of the lever 29 and the supporting plate 2'! therefor and has one end supported on a lug 36 on said arm and the other end supported on'a lug 31 on said plate.

When the door of the modified construction is closed, thecoil spring 34 on the chain rod 10 of the lower door section 2 urges the bell crank lever 29 in a direction that will slide the bolt 26 over the guide shoe 6 of the upper door section I, thereby preventing the upper door section from ously, the spring 34 moves downwardly with the lower door section, thus permitting the spring 35 35 to rock the lever 29 in a direction which will withdraw the bolt 26 from'the path of movement of the guide shoe .6 of the upper door section I and thus permit the latter to open. The bolt 26 moves to locking position after the guide shoe 6 of the upper door section moves downwardly below the level of said bolt. In the fully closed position of the door, the guide shoe 6 of the upper door section is spaced below the bolt 26 so as to permit opening movement of said upper door section with the lower door section until the latter has opened far enough to permit the lever 29 to withdraw the bolt 26.

Obviously, the hereinbefore described elevator shaft door construction admits of considerable modification without departing from the inven: tion. Therefore, I do not wish to be limited to the precise arrangements shown and described.

What I claim is:

1. In a door construction comprising counterbalanced upper and lower door sections slidable vertically in opposite directions to open and close in unison and means for manually locking the lower door section in closed position, the combination therewith of a latch plate on said upper door section, an arm on said lower door section, a latch lever, a cam on said lever engaged by said arm upon, the vertical sliding movement of said lower door section to closed position, a hooked detent formed at one end of said latch lever and movable therewith from a normal retracted position into a position engaging said latch plate for locking the upper door section in closed position, and spring means acting on said lever in response to the vertical sliding opening movement of the lower door section and arm away from said cam for moving the lever and return said hooked detent to normal retracted position out of the path of movement of said latch plate while the door sections are out of closed position, said hooked detent being actuated by said cam and arm into locking position substantially simultaneously with the sliding movement of both upper and lower door sections into closed position in unison.

2. In a door construction comprising counterbalanced upper and lower door sections movable vertically in opposite directions to open and close in unison and means for locking said lower door section in closed position, the combination of separate means for locking the upper door section in closed position, said separate locking means comprising an abutment rigid with the upper door section, a horizontally pivoted latch lever, a hooked detent at one end of said lever, a cam surface on said latch lever at the other side of the pivot from said hooked detent, arm means on the lower door section moved, when the lower door section approaches its closed position, to engage said cam surface of said lever and pivot said lever to move said hooked detent into the path of travel of said abutment on the upper door 2 section, and spring means for pivoting said latch REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,173,129 Taliaferro Feb. 22, 1916 1,379,537 Davis May 24, 1921 0 1,509,679 Fischer Sept. 23, 1924 2,323,358 Shannon et al July 6, 1943

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