US2358994A - Elevator door operator - Google Patents

Description

SePf- 26, 1944- I R. s. PEELLE 2,358,994

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R. s. PEELLE ELEYATOR DOOR OPERATOR Filed July 24, 1945 ,4 Sheets-Sheet' 3 E065@ 7' 6I Pff/ 1. E,

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Sept. 26, 1944; R s PEELLE 2,358,994

ELEVATOR DOOR OPERATOR Filed July 24, 1943 4 Sheets-Sheet 4 160551275 Pfam,

1;@W/fff TTOP/VE X Patented Sept. 26, 1944 ELEVATOR DOOR OPERATOR Robert S. Peelle, Hollis, N. Y., assignor to The Peelle Company, Brooklyn, N. Y., a. corporation of New York Application July 24, 1943, Serial No. 496,257

7 Claims. (Cl. 187-52) My present invention relates to operators for elevator doors, the same being more particularly adapted to operate doors known to the trade as counterbalanced doors with the doors being comprised of two sections movable in opposite directions vertically and in substantially the same plane. The door sections are mounted within the elevator shaft and are guided in their vertical movements by means of guide rails secured to the walls of the elevator shaft with the guide rails being located adjacent the jambs of the respective openings. Each lower section of each door is connected, at its sides, to its respective upper section by means of chains passing over sheaves which are mounted in housings fastened to the guide rails.

Operating devices have heretofore been used which are either located above the travel of the elevator car, or located at each of the doors. Operators geared directly to the sheaves have also been used. All of these operators require extensive electrical wiring together with elaborate panel boards with their switching and reversing equipment, and also extensive mechanical hookups are required from the operators to the doors.

The primary object of the invention is the provision of an operator mechanism which is carried on the under side of the elevator car platform, and which is adapted to engage and open or close any one of a series of doors Without the necessity of using extensive mechanical hookups or wiring.

A second object of the invention is the provision of an operating device which moves into and out of engagement with a part of the door, the operator being actuated through electrically connected push buttons located within the elevator car.

A third object is the provision of a geared rack bar or the equivalent thereof having one part secured to one section of the door and with a second part thereof being slidable within the iirst part, and with the slidable part having means carried thereby for latching the door in closed position.

Another object of the invention is the provision of an operating mechanism which eliminates the necessity of using a retiring cam in connec-n venting injury to any of the parts thereof through quick starting and stopping operations,

Other objects and advantages of the invention will suggest themselves in the course of the following description, and that which is new will be pointed out in the appended claims.

In order that the invention may be more fully understood, reference is made to the accompanying four sheets of drawings, in which:

Figure 1 is a shaft side elevation of a door having a portion of the device in connection therewith.

Figure 2 is a vertical section through the meeting rails of the door, taken on line 2-2 of Figure l. l

Figure 3 is a detail section through the right jamb of an opening and showing the guide rail members and a portion of the door, as taken on line 3-3 of Figure 1.

Figure 4 is an enlarged detail of the portion of the device which is secured to the door and showing the same in connection with an electrical interlocking device.

Figure 5 is a detail plan section,`taken on line 5 5 of Figure 4, showing the guide for the lower extending portion of the device which is secured to the door.

Figure 6 is a detaill section taken on line 6-6 of Figure 4.

Figure 7 is a detail section, taken on line l-l of Figure 6, showing the rear side of the latch member with the same being shown in latching position.

Figure 8 is a detail similar to Figure 7 except the latching member is shown in disengaged position.

Figure 9 is an elevational detail showing the operator and associated parts as being secured to the under side of an elevator car platform and with the same lbeing shown in neutral or disengaged position.

Figure 10 is a detail elevation similar to Figure 9y except the operating mechanism is shown in driving position.

Figures 11 and l2 are detail elevations taken from lines Il-II and |2-I2 of Figures 9 and 10 respectively.

Figure 13 is a detail elevation showing means of frictionally applying power to the driving sprocket, taken on line I3-I3 of Figure 10.

Like characters designate like parts throughout the several views.

In order that the construction, the operation, and the advantages of the invention may be more fully understood, I will now take up a detailed description thereof in which the same will be more fully described.

Referring now to the drawings'in detail, I and 2 designate the upper and lower panels respectively of the door. The upper panel is secured in the frame 3, and thev lower panel is secured in Y the frame 4. Members 5 are secured to the upper surface of the lower section of the door to provide support for trucks between the building iloor and the elevator car platform. A trucking or reinforcing angle 6 is built into the lower'section with the horizontal portion 6 thereof being of substantially the same length as the width of the door section and with the vertical leg thereof exe tending therebeyond and forming `the portions 6".

The sections of the door are guided in their vertical movements by means of the guide rails 1 and 8 with each of the rails 1 being rigidly secured to the wall A or to a frame jamiel member B by means of screws or bolts 9. Guide shoes I0, having guide rail engaging slots formed therein, are

VThe upper and lower sections of the door are secured in connected relation by means of chains or other suitable iiexible means I4 and rods I5, with the ilexible members extending over sheaves It which are secured to their respective guide rails Yby means of the housings I1. One end of each of the flexible members is secured in a chain fastener I8 which is secured to the frame member of the upper section. Each of the rods I5 is adjustably secured, at its lower end, to the extended portion of the reinforcing angle 6 through a lug rigidly secured to one of the reinforcing angle eX- tensions 6, and extends downwardly therefrom. The lower end of the guide 2I is braced from the wall A by means of bracket 22, with roller 23 providing means reducing friction between the gui-de and the bracket. Rollers 24 bear against the sides of the guide 2| and prevent lateral movements of the guide.

A shoulder screw 58, extending through a slotted hole in channel guide 2I and being threaded into channel 25, as shown in Figures 6, 7, and 8, provides means limiting the vertical movement of channel 25 with relation to channel guide 2|.

Channel 25, carrying the rack-forming linkage 26, is slidable vertically within guide 2l. A hook 21 is welded or otherwise suitably secured to the upper end of channel 25 and extends over the reinforcing bar 6". A latch 28 is pivotally mounted on an angle 29 which is rigidly secured to the bar 6, as shown in Figures 6, 7, and 8. A compressionspring l3I is provided to force the latch into engagement with the interlocking device.

The interlocking vdevice is comprised of the case 32 having an incline 33 formed at the lower end thereof. A swingable arm 374, pivoted on screw 35, is located within the case and carries contact bar 36 into and out of electrical contact with the contact posts 31. The contact posts are connected electrically into the elevator control circuitby means of wires 38.

The operating mechanism comprises the motor 39 which is rigidly secured to the under side of the elevator car platform C, the motor 49, the reducer 4 I and the sprocket 42, which are mounted on the swingable plate 43 having the shaft 44 secured thereunder and with the ends of the shaft 44 being jo-urnalled in supporting brackets 45 which are rigidly secured to the under side of the elevator car platform C. A crank arm 46 is secured lto the shaft of motor 39 and is revolvable with the shaft. Link 41 is revolvably secured on the crank arm pin. Shaft 48 is rigidly secured to the under side of plate 43 and projects there-v beyond and forms a trunnion for the link 49. A exible linkage 5D is connected, at its upper and lower ends, to link 41 and link 49 respectively.

VThe reducer 4I has sha-ft 5I projecting from one side thereof whichV carries sprocket 42. Sprocket 42 is not rigidly secured to shaft 5| but is frictionally engaged by Washers 52 through the friction plates 54. Each of the washers 52 has a slot 52' formed therein and is revolvable with the shaft by reason of pins 53 extending through the shaft and intovthe slots 52', as shown in Figure 13. A compression spring 55 bears against the outer Washer 52 with the compression of the spring 55 being adjustable by means of the nut 56, A pin 51 maintains nut 56 in its `adjusted position.

In the operation of the device, the elevator car is stopped at a floor landing adjacent a door. Constant pressure open and closel pushbuttons (not shown) lare located in the elevator car for controlling motors 39 and 4U which operate simultaneously with each other. When the motors are energized, crank arm 46, being secured to the shaft of motor 3 9, carries linkage 50 therewithl and tilts the platform plate 43 which is pivcted in brackets`45 from the position shown in Figure 9 to the position shown in Figure 10. The sprocket 42, being revolved by shaft 5I in a clockwise direction, engages the rack 26 causing the same to move downwardly and carrying channel 25 therewith. With `the initial downward movement of channel 25, hook 21 'engages latch 28 and pivots the same to the position shown in Figure 8. When the latch is disengaged, as shown in Figure 8, the swingable arm 34 of the interlocking` de.- viceswings away from the contact posts 31 Vand breaks the elevator control circuit, thereby preventing movement of the elevator car until the door is again closed and the latch 29 engages the lower portion of arm 34 forcing the contact bar 36 into engagement with contact posts 31. The hook 21, in its downward movement in opening the door, engages the upper surface of bar 6 and starts a downward motion thereof and causing the lower section of the door to move downwardly, As the lower section of the door` moves downwardly, the upper section moves upwardly by reason of thetwo sections being connected by the flexible members I4 and the rods I5.

As the door comes to full open position the motors are deenergized by releasing pressure on the open pushbutton and the lower section rests on stop members 20. When the motors are deenergized, the plate 43, carrying motor 40 and reducer4l, moves by gravity from the position shown in Figure 10 to the position shown in Figure 9 thereby disengaging sprocket 42 from the rack 26.

When it is desired to close the door, pressure is exerted o-n the close pushbutton and the motors rotate in the reverse direction from that in opening the door. As the motors rotate, the platform 43 is again tilted to the position shown in Figure 10 and engaging sprocket 42 with rack 26 causing the same to move upwardly and thereby closing the door. As the door approaches its closed position, the upper portion of latch 28 strikes incline 33 forcing the latch outwardly against the compression of spring 3|. After latch 28 passes the lower portion of the interlock case the latch is forced toward the interlock case by means of spring 3| with the latch engaging arm 34 and forcing the same toward the contact posts 31, and with the contact bar 36 bridging thereacross and completing the elevator control circuit, after which the elevator car may be moved to another landing.

When the doors are to be opened or closedv there is considerable inertia to be overcome upon starting the door in either direction of travel. When sprocket 42 engages rack 26, the sprocket, being frictionally held between washers 52, is being revolved by means of shaft Until the inertia of the doors has been overcome, the sprocket, being frictionally engaged by plates 54, revolves at a lower rate of speed than the shaft 5|. After the inertia of the door has been overcome, the speed of the sprocket then approximates the speed of the shaft. The friction plates provide means permitting the sprocket to absorb sudden shocks as the same is moved into engagement with the rack 26.

The bracket 22, together with the roller 23, prevents the guide 2| from being forced away from the sprocket and rollers 24 prevent canting of the door by preventing lateral movements of the guide 2|.

While I have shown the rack as being comprised of chain 26 secured in the channel 25, a conventional geared rack may be substituted therefor, and a conventional spury gear substituted for the sprocket.

It is to be understood that I am not to be limited to the exact form and arrangement of the parts herein shown and described, but that minor changes may be made, insofar as the changes may fall Within the scope of the appended claims.

Having now fully shown and described the invention, what I claim, and desire to secure by Letters Patent of the United States, is:

1. In combination with a two section bi-parting elevator door operating vertically in guides secured to an elevator shaft wall, a rack secured to one of the sections and carried thereby, an operating mechanism tiltably secured to the ,under side of an elevator car operating in the shaft and movable into and out of engagement with the rack and transferring motion therethrough to the door, and a guide member secured to the elevator shaft wall and engaging the rack assembly and 'maintaining the same in alignment and preventing canting of the door when motion is transferred to the door.

2. In combination with a bi-parting door having an interlocking device mounted adjacent thereto, a rack guide rigidly secured to and carried by one section of the door, a rack slidably positioned in the rack guide, means limiting movement of the rack with relation to the ra-ckguide, a latch member carriedby the door and engaging the interlocking device, and a hook rigidly secured to the upper end of `the rack and en- .gageablewith the latch member and providing means of unlatching the door and simultaneously breaking the interlocking electrical circuit through disengagement of the latch member from the interlocking device.

3. In combination with a -bi-parting door mounted in vertical guides secured to an elevator shaft wall, an interlocking device secured to one of the vertical guides, a rack slidably mounted in a guide secured to and carried by one section of the door, a latch member secured to and carried by one of the door sections and adapted to engage the interlocking device, a hook rigidly secured to the upper end of the rack, with downward movement of the rack engaging the hook with the latch member and disengaging the latch member from the interlocking device and breaking the interlocking circuit and permitting the door to be opened.

`4. In combination with an elevator landing door, a rack secured to the door, an elevator car, an operating mechanism secured under the elevator car platform, said operating mechanism comprising one motor rigidly secured to the under side of the elevator car platform with a second `motor -being mounted on a pivoted plate with said pivoted'plate being supported by brackets secured to the under side of the car platform, a reducer in connected relation to the second motor and with a sprocket carried by the reducer, a linkage extending from the first motor to the `pivoted plate, and with the rotating motion of the rst motor tilting the pivoted plate until the sprocket engages the rack.

5. In combination with an elevator car operating in an elevator shaft, doors mounted between guides secured to the shaft walls, a rack secured to a portion of the door, an operating mechanism, said operating mechanism comprising a motor rigidly secured to the elevator car and a second motor mechanism pivotally secured in brackets secured -to the elevator car, a linkage extending between the rigidly secured motor and the mounting of the second motor and with the rotation of the rst motor exerting a pull on the linkage and pivoting the second motor mechanism with relation to the elevator car, a sprocket carried by the second motor mechanism, and with the pivotal action ofthe second motor mechanism engaging the sprocket thereof with the rack member.

6. In an elevator hatchvvay, an elevator car movable upwardly and downwardly in said hatchway, landing openings in the latchway walls, biparting doors closing said landing openings, a rack secured to and carried by one section of said doors, a door operating mechanism tiltably supported by means of brackets under the elevator car, a toothed member carried by the tiltable operating mechanism, means iXedly secured under the elevator car providing means tilting the operating mechanism by means of a linkage extending therebetween, and with the tilting action of the operating mechanism moving the toothed door being composed of upper and lowersections yoperating in substantially the `same plane, an

electric interlock secured A"to one Aof the guides and located adjacentthe upper ydoor section, a latch carried by *the lowermost door sectionand engageable with the electric interlock, a downwardlyextending rack guide rigidly secure'dto the lowermost door section, a rack slidably mounted .in the rack guide, means limiting the movement of the rack with relation to the rack guide, with the movement of the rack downwardly disen- :gaging the latch from the electric interlock, door operating means pivotally mounted to the under `side of the elevator car, and with the pivotal action of the operating meansengaging the operating means with the rack and imparting motion yto the door' therethrough.

ROBERTS. PEELLE.

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