US3407536A

US3407536A - Sliding door

Info

Publication number: US3407536A
Application number: US559630A
Authority: US
Inventors: Wilford O Nystrom
Original assignee: Morton Manufacturing Co
Current assignee: Morton Manufacturing Co
Priority date: 1966-06-22
Filing date: 1966-06-22
Publication date: 1968-10-29
Anticipated expiration: 1985-10-29

Description

Qct. 29, 1968 w. o. NYSTOM SLIDING DOOR 2 Sheets-Sheet 1 Filed June 22, 1966 INVEN'IOR WILFORD 0. NYSTR United States Patent 3,407,536 SLIDING DOOR Wilford 0. Nystrom, Palos Park, lll., assignor to Morton Manufacturing C0. Chicago, Ill., a corporation of Illinois Filed June 22, 1966, Ser. No. 559,630 2 Claims. (Cl. 49-482) ABSTRACT OF THE DISCLOSURE A subway car sliding door equipped with rigidifying and edge closing means wherein the leading side of a door has a longitudinally-extending recess equipped with an elongated areuately flanged extrusion member carrying a resilient guard, the rear edge of the door having an L-shaped slot carrying a generally L-shaped resilient strip.

SUMMARY OF INVENTION For side-entry doors in subway cars which are frequently opened, the invention provides uniquely constructed seals and reinforcements, these constituting principal objectives of the invention.

The inventon is explained in conjunction with the accompanying drawing, in which:

FIG. 1 is an elevational view of a door constructed according to the teachings of this invention;

FIG. 2 is an enlarged fragmentary sectinal view taken along the line 22 of FIG. 1;

FIG. 3 is an enlarged fragmentary sectional view taken along the line 33 of FIG. 1;

FIG. 4 is a fragmentary seetional elevational view corresponding to that taken at right angles to FIG. 3;

FIG. 5 is an enlarged fragmentary sectional view taken along the line 55 of FIG. 1; and

FIG. 6 is an enlarged fragmentary sectional view taken along the line 66 of FIG. 1.

Referring n0w to FIG. 1, the numeral 10 designates generally a sliding side door for a vehicle such as a subway car. The door coacts with a car frame portion (seen only fragmentarily and designated by the numeral 11 in FIG. 2) and a second identical sliding door aligned in the opposite drection (shown in phantom in FIG. 1). The door 10 has a window 13 provided in its upper central portion and is defined by a pair of facing sheets enclosing a kraft hexagonal honeycomb 14. The edges or perimeters of the sheets 15 making up the door 10 are integrated by means of perimetric channels as at 16, 17, 18 and 19 (proceeding clockwise around from the front or leading edge 20). The rear or trailing edge 21a coacts with the frame portion 11 to provide a seal (using a strip generally designated 21). The iorward or leading edge of the door as at 20 includes a finger guard of resilient material and designated generally by the numeral 22, which coacts with an identical edge of a second door facing in the opposte direction.

The frame sheets 15 are spotwelded together in the area designated 23 (see FIG. 2) to de-fine an opening for the window 13, and a window frame of suitable resilient material and designated 24 in FIG. 2 is provided for supporting the pane of glass constituting the transparent portion of the window 13.

A problem has existed relative to the replaceability of the finger guards 22 which, as will be appreciated, can wear relatively rapdly, at least in comparison with the rernainder of the door and frame construction and which is an inviting target for vandals knives. The means for mounting the finger guard 22 in a unique fashion can be seen in enlargedform in FIG. 6. There, the faceproviding sheets 15 of the door 10 are seen to be spaced apart by means of a channel 16. Channell6 ordinarily is welded to the sheets 15 as by spot-weldng.

The channel'or element 16 provides a recss 25 (still referring to FIG. 6) which is adapted to-receive an elongated extrusion member generally designated 26. The member 26 is essentially pi-shaped, consisting of a fiat plate portion 2Tand rearw'ardly-extending

legs

28 and 29. The

legs

28 and 29 are seen to be arcuately contoured at least along one elongated face thereof as at 30 and 31, respectively, for coaction with correspondingly arcuately contoured

leg portions

32 and 33 provided by the channel element 16. The mode of operation can be appreciated from the dotted lne showing designated 26' in FIG. 6 wherein the member 26 is in the process of installation, a fulcrum or pivot point being develbped at the point 32. It will be noted that the radius of curvature of the leg 29 and leg portion 33 in the confronting arcuate elongated surfaces thereof is coniderably less than the confronting arcuate surfaces of the leg 28 and leg portion 32. Also, the provision of legs and leg portions develops a slight springiness or compression, causng the member 26 to remain tightly seated when in place so as to maintain the finger guard 22 in positi0n. The assembly of finger guard 22 and member 26 is advantageously 1eleasably secured in place to the sheet 15 and channel 16 by means of screws 34. The finger guard 22 is secured to the flat plate 27 by means of pins or rivets 12.

Pivoting and seating of the member 26 is facilitated by virtue of providing angular hearing surfaces on the leg 29 and leg portion 33 as at 35 and 36, respectively, the surface 35 being designated 35 in the broken lne showing of FIG. 6.

The arrangement just described provides a superior operation in not only being more readily removable than prior constructions which required special tools therefor, but also by being more rigid, tending to form a tubular construction under stress and thereby being capable of more rigidity without excessive deflection.

At its rear or trailing edge, the door is characterized by another novel construction which includes the weatherstrip 21 and which is seen in enlarged fragmentary form in FIG. 5. In FIG 5, the sheets 15 are seen to be integrated by means of the channel 18 which additionally may be riveted by means of elements 37 as well as the welding previously referred to. The channel 18 is equipped with a longitudinally-extending slot 38 on the outside face thereof and which is generally Lshaped, having a base portion 39 and an upstanding portion 40. The base portion 39 extends in the direction of the leading or forward edge of the door 10, i.e., the edge equipped with the finger guard 22.

In like fashion, the weatherstrip 21 is also L-shaped, having a base portion 41 and an outstanding portion 42. As the door closes, contact of the strip 21 with the frame portion 11 tends to deform the strip 21 to the cl0tted lne configuration designated 21 in FIG. 5, and thus tends to seat the strip 21 even more firmly within the slot 38. Thus, the strip 21 is installed without the need for elaborate securement, facilitating removal and replacenient of this wearable element.

I have found it advantageous to employ a weatherstrip 21 of the construction shown, wherein the exterior terminal portions of the strip 21 and slot 38 are arcuately curved as at 43 in FIG. 5, and further where the connective portion 44 of the outstandng portion 42 is generally perpendicular to the length of the base portion 39. In proceeding toward the terminal portion of the outstanding portion 42, the strip 21 is tapered as at 45.

In operation, the guard 22 and strip 21 coact to seal the door 10 within the opening provided by the frame portions 11 and the opposing coacting door. Any shock applied to the

resilient elements

21 and 22 is transmitted to the superiorly reinforced door without the tendency to excessively distort the door er detach the

sealing elements

21 and 22 from their mountings.

As shown in FIG. 3, the inventive door is mounted for slidable movement thereof. The sheets 15 are equipped with a top channel 19 having pin 46 extending transversely therethrough adjacent the trailing edge of the door. Extending downwardly from channel 19 and attached thereto by rivet 47 is bracket 48. Hanger bar 49 is received within channel 19 and is provided with a notch as at 50 which is drawn into tight engagement with pin 46 by means of bolt 5, which extends through bar 49 and bracket 48 and is threadedly engaged by nut S1. Bolt 50 may be provided with an Allen head so that it may be tightened and loosened with an Allen wrench without disassembling the door.

The haar 49 is equipped with longitudinally-extending grooves as at 52 for the receipt of ball bearings 53 provided as part of a hanger arrangement generally designated 54. The door is thus supported by the notched portion of bar 49 and the bolt 50 extending through bar 49.

The hanger-lock arrangement not only rigidifies the upper section of the door but is readily accessible for re moval and replacement, this being necessary when the door is to be removed. A11 that is required is the opening of the forward edge of the door by removing the closure member 26 to expose the bolt 50. When the bolt 50 is removed, the pin 46 may be slid elear of notch 50 and the door removed from hanger structure 54.

Even though bolt 50 is readily accessible, water and debris are prevented from reaching the inside of the door by bracket 48 which extends between opposing sheets 15, thereby acting as a weather seal.

While in the foregoing specifieation a detailed description of an embodiment of the invention has been set down for the purpose of illustration, many variations in the details hereingiven may be made by these skilled in the art without departing from the spirit and scope of the inventon.

I claim:

1. A generally rectangular sliding door having a longitudinally-extending recess in the forward edge thereof, an elongated extrusion member removably engaged with said forward edge recess, and an elongated resilient guard secured to said member, said recess beng defined by spaced arcuate flange means and said member comprising cooperating areuate flange means whereby said member is adapted to be pivotally removed from its engagement with said recess flange means, said door having a longitudinally-extending slot in one face thereof adjacent the rear edge of said door, said slot being generally L-shaped in transverse section with the base of the L-shape extending toward the door forward edge, and an elongated integral resilient strip removably mounted in said slot, said strip being generally L-shaped in transverse section to generally conform to said slot whereby forward movement of said door to closing position tends to seat said strip firmly without the need of additional securing means.

2. The structure of claim 1 in which the transverse shape of said slot and strip are each defined by a base part and an upstanding part, the terminal outer =portin of the said base parts being arcuate, the connective interior portion of said upstanding part being generally normal to the length of said base part with the remaining interior portion of said upstanding part being angularly related to said base part length to provide an upstanding part tapered adjacent its terminal interior portion.

References Cited UNITED STATES PATENTS 1947736 2/1934 Potter 49-488 X 1,967,456 7/1934 Swedman et al. 49-489 X 2O10,520 8/1935 Kiekert 49-488 X 2,121826 6/1938 Roberts 49488 X 2,583,978 1/1952 Walter et al. 49-482 X 3,029052 4/1962 Early et al 52-588 X 3,055,461 9/1962 De Ridder 52-588 3,111205 11/1963 Gresham 52-588 3,299,596 1/1967 Neal et al. 49-488 X DAVID J. WILLIAMOWSKY, Primary Examner.

PHILIP C. KANNAN, Assistant Examiner.