US2193860A

US2193860A - Door opening and closing mechanism for elevators

Info

Publication number: US2193860A
Application number: US259483A
Authority: US
Inventors: Harold C Crane
Original assignee: Turnbull Elevator Ltd
Current assignee: Turnbull Elevator Ltd
Priority date: 1939-02-11
Filing date: 1939-03-02
Publication date: 1940-03-19
Anticipated expiration: 1957-03-19

Description

H. C. CRANE Maw, 19, 1940.

DOOR OPENING AND CLOSINGMECHANISM FOR ELEVATORS Filed March 2, 1939 2 Sheets-Sheet 1 'hveTn'or H. C. C Tahe Maud-r19, 1949. H. c. CRANE 2,193,860

DOOR QPENING'AND CLOSING MECHANISM FOR ELEVATORS Filed March 2, 1939 2 Sheets-Sheet 2 Patented Mar. 19, 1940 UNITED STATES PAT ENT OFFICE DOOR OPENING AND CLOSING MECHANISM FOR. ELEVATORS Harold C. Crane, Toronto, Ontario, Canada, as-

signor to Turnbull Elevator Company Limited, Toronto, Ontario, Canada Application March 2, 1939, SerialNo. 259,483 In Canada February .11, 1939 Claims.

" breaking the toggle and then look. it tightly without slack to the car door.

I attain my objects by'means of the constructions hereinafter described, and illustrated in the accompanying drawings in which :Fig. '1 is a front elevation of the mechanism on the car door;

Fig. 2 a section .on the line 2-2 in Fig. 1, showing also part of the vco-operating mechanism of the hatchway door;

Fig. 3 a side elevation of the hatchway door mechanism .withthe door removed; and

Fig. 4 a diagrammatic front elevation of part of the car door mechanism.

The car is illustrated .as .slidably mounted in .25 a shaft on .guide rails. on the shaft wall 21.

Although two co-operating doors may, and usually are used, for the sake of simplicity a single sliding car door 5 is shown which in its closed position meets the fixed wall 26 of the car.

30 On the car is mounted the main door operating lever I which is 'pivotally connected to the bottom car supporting beam 29 and is operated in the ordinary way and which is connected to operate a slide 2 whichcarriesa movable clutch 335 member 6 adapted taco-operate with a clutch member 9 fixed to the car door 5 and which clutches are adapted to engage two rubber rollers 'I and 8 pivoted on the hatchway door one over the other. One of these rollers-is fixed 40 relative to the hatchway door 25 but the other one isso arranged thatit has a travel of about an inch and a half, this travel being utilized to pick up the hall door without shock'and at the same time break the toggle I5 holding the door L-shaped lever I2 pivotedat its lower end at I3 onthe car door and having a rod A pivotally connected with its upper end, which rod .A extends through a lug C secured to the car door.

On this rod is threaded a nut Bwhich bears against the side of the lug and provides an adjustable abutment determining the position of the lever system relative to the slide and the position of the movable clutch relative to the fixed clutch. A spring B bears against the opposite side of the lug and a collar E is threaded on the end of the rod A and serves to permit the door to travel slightly ahead of the door open ing lever system at a point in its opening and M closing movement, for a purpose hereinafter "15 explained.

The connection between the main lever I and the slide is necessarily arranged to allow for the arc-like movement of the main lever. Referring particularly to Fig. 1, .it will be noted that the 20 upper end of this lever is secured to the slide 2 by means of a device 3 which comprises an arm 3 pivotally connected to the lever I and ad justably secured to a pin 3 which is slidably mounted in a bracket 3 which is secured to the 521,

slide 2. The slide 2 is slidably mounted in brackets 4, 4 so that when the lever I is moved to the right to open the car door the slide 2 slides in the brackets 4, 4, which are mounted on the outer side ofthe door 5 of. the elevator.

Mountedat oneend of the slide 2 is the clutch member 6 so that it moves with the slide. This clutch is pivoted on a vertical axis on a bracket I4 which is bolted to the slide 2. The clutch is .in the form of a rectangular plate with an inwardly turned engaging end and its upper and lower edges are bevelled so that the clutch member may swing in when the bevelled edges meet any obstruction, thus avoiding breakage.

A further purpose for providing that this clutch 40 2 will swing in is that it .may be manually moved out of the way to permit the car door to be moved relative to the hall door'if it is desiredto get atthe mechanism for adjustment or repairs. A second or fixed clutch 9 of similar construction is also provided. This is mounted on a bracket I5 which is bolted to the car door and is mounted to swing in the same manner as the clutch 6.

'Theclutch

members

6 and 9 are of considerable length to ensure their satisfactorily passing up on either .side of the rollers I and 8 into proper position. for .the opening operation, and are normally pressed out by

springs

6 and 9 The rollers I and 8 hereinbefore referred to which are mounted on a plate 25 on the hall or hatchway door 25 and the other mechanism for the operation of the hall door are arranged as follows: Referring particularly to Fig. 3, it will be understood that the roller 8 is fixedly mounted on the hall door facing the mechanism on the car door. Similarly positioned is the roller 7 which is secured to the arm 2| pivoted on the hall door at 22 and adapted to engage an adjustable back stop 23. This stop 23 will usually be adjusted to position the roller with its center about A to the left of the center of the roller 8.

The cam arm I9 is pivoted at one end to the toggle lever I5 at I8 and at the other end to the adjustable toggle lock arm 2i] which is also pivoted to the toggle and which serves to adjust the position of the cam arm i9 relative to the arm 2|. The toggle lever 15 is pivotally connected at Il to the wall 2'! of the elevator shaft and at I8 to the hall door and is pivoted centrally at It where it may be broken initially by pressure applied to the toggle lock arm by the arm 2I through the medium of the cam arm I9.

An adjustable stop 24 prevents the toggle breaking downwardly.

The mode of operation is substantially as follows: With the lever I in the position shown in Figs. 1 and 2 of the drawings, the car door and the hall door are entirely closed. The first movement of the lever I to the right, as viewed in the drawings, moves the slide 2 and with it the clutch member 6 connected thereto. The door at first moves at a relatively slower speed than the end of the lever I which first swings the arm I upwardly and rocks the link I! and lever I2, moving the lever I2 and rod A in the direction of travel of the lever I, but at a slower speed, and causing the car door which is slidably mounted on the elevator, to move by engagement of the .nut B with the lug C. Continued swing of the lever I to the right, however, straightens out the link II and ultimately brings it into alignment with the direction of movement of the lever I, causing it to pull the lever I2, the rod A, and the door at substantially the same speed as the upper end of the lever I.

During the initial movement of the lever l to the right, the slide 2, which is directly connected to the lever I, moves to the right more rapidly than the car door, causing the clutch 5 to engage the roller i, move it into alignment with the roller 8 and clamp them against the clutch 9, thus breaking the toggle I5 on the hatchway door as previously described. After the rollers have been so clamped, the clutch 6 and the car door travel at substantially the same speed so that the relative positions of the clutch 8 and the clutch 9, which is secured to the car door, are maintained for the greater part of the forward and backward movements.

It has been said that, after its initial movement, the clutch 6 during the opening and closing movement of the door travels at substantially the same speed as the car door and the clutch 51, holding the rollers I and 3 clamped tightly together, and thus positively locking the car and hatchway doors together without backlash.-

However, owing to the relative arrangement of the mechanism operating the clutch 6 and the car door (and clutch 9) respectively, during the greater part of the forward and backward movement the clutch 6 travels a little ahead of the car door. In Fig. 1 there is shown in dotted lines the approximate relative positions of the various parts of car door operating mechanism after the lever has been moved to the right. This shows that the car door does not maintain the same relative position to the clutch 6 as it had at the commencement of the opening movement. There is, in fact a definite lag. This would ordinarily develop excessive pressure on the rollers "I and 8, which would cause the mechanism to jam or break. To relieve such pressure, the spring D, described above, is provided. This spring permits the car door to run ahead of the car door operating mechanism I, Iii, II, iii and A, while at the same time exerting sufficient retarding pressure to retain the clutch 8 in engagement with the rollers I and 8 thus keeping the two doors constantlypositivelyinterlocked and returning the nut B to engagement with the lug C at the latter part of the closing movement.

The return movement of the lever I actuates the rod A to the left, as viewed in the drawings. The compression of the spring D against the lug C actuates the car door thus giving an easy start and resilient drive to the door. The clutch 6 is positively actuated in the return direction, maintaining substantially the same relationship to the clutch 9 as in the opening movement. Final movement of the lever I to the left returns the link II with the parts attached thereto to the initial position with both doors closed and the clutch 6 positioned spaced from the clutch 9, permitting the hall door to be locked by the movable roller I which takes up the position which permits the toggle arm I5 to straighten out and hold the hall door closed.

What I claim as my invention is:

l. Mechanism for opening and closing hatchway doors and car doors of elevators, comprising means for opening the car door; a clutch member; means operable by the car door opening means for moving the clutch member with but initially faster than the car door; a clutch member fixed on the car door and spaced from the relatively movable clutch member; a member mounted on the hatchway door for limited movement relative thereto and normally positioned between the said clutch members when the car is at a landing; and a toggle lock arm adapted to be actuated by the relatively movable hatchway door member to break the toggle, the relatively movable clutch member during its initial relatively fast movement engaging the relatively movable hatchway door member and moving the same to cause it to actuate the toggle arm and break the toggle and clamp the said hatchway member against the fixed clutch member.

2. Mechanism for opening and closing hatchway doors and car doors of elevators, comprising meansfor openingthe car door; a clutch member; means operable by the car door opening means for moving the clutch member with but initially faster than the car door; a clutch member fixed on the car door and spaced from the relatively movable clutch member; a member fixed to the hatchway door; a member mounted on the hatchway door for limited movement relative thereto and normally positioned between the said clutch members when the car is at a landing; and a toggle lock arm. adapted to be actuated by the relatively movable hatchway door member to break the toggle, the relatively movable clutch member during its initial relatively fast movement engaging the relatively movable hatchway door member and moving the same to cause it to actuate the toggle arm and break the toggle and clamp the said fixed and relatively movable hatehway door members in vertical alignment againstthe fixed clutch member.

3. Mechanism for opening and closing hatchway doors and car doors of elevators, comprising a lever for operating the car door; a member slidably mounted on the car door and operated directly by the car door operating lever; 21. system of links and levers connecting the operating lever with the car door whereby the initial opening and final closing movement of the car door is relatively slower than the corresponding movement of the slidably mounted member; a toggle lever for locking the hatchway door; a toggle lock arm; and a swingable member mounted on the hatchway door, said member being connected to the toggle lock arm atits free end; and means whereby the slidably mounted car door member, during its initial relatively fast movement, is adapted to actuate the swingable hatchway door member to swing the samev to actuate the toggle lock arm to break the toggle.

4. Mechanism for opening and closing hatchway doors and car doors of elevators, comprising a lever for operating the car door; a member slidably mounted on the car door and operated directly by the car door operating lever; a system of links and levers connecting the operating lever with the car door whereby the initial opening and final closing movement of the car door is relatively slower than the corresponding movement of the slidably mounted member; a member fixed to and movable with the car door; and a member mounted on the hatchway door and normally located between the fixed and relatively movable car door members, whereby the initial relative fast movement of the latter car door member will clamp the said hatchway door member against the fixed car door member providing a positive locking engagement between the car door and the hatohway door during all but the initial opening and final closing movement of the doors.

5. Mechanism for opening and closing hatchway doors and car doors of elevators, comprising a lever for operating the car door; a member slidably mounted on the car door and operated directly by the car door operating lever; a system of links and levers connecting the operating lever with the car door whereby the initial opening and final closing movement of the car door is relative ly slower than the corresponding movement of the slidably mounted member; a member fixed to and movable with the car door; a member mounted on the hatchway door and normally located between the fixed and relatively movable car door members, whereby the initial relative fast movement of the latter car door member will clamp the said hatchway door member against the fixed car door member providing a positive locking engagement between the car door and the hatchway door during all but the initial opening and final closing movement of the doors; and spring means in the lever and link system to relieve excess pressure on the hatchway door member resulting from differences in the speed of movement of the relatively movable and the fixed car door members.

HAROLD C. CRANE.