US3694959A

US3694959A - Metal sliding window

Info

Publication number: US3694959A
Application number: US57632A
Authority: US
Inventors: Karl Gartner
Original assignee: Josef Gartner and Co
Current assignee: Josef Gartner and Co
Priority date: 1969-07-26
Filing date: 1970-07-23
Publication date: 1972-10-03
Anticipated expiration: 1989-10-03
Also published as: AT321534B; NL7011017A; CA929421A; CH519651A; DE1938021A1; DE1938021C3; FR2055532A5; SE356784B; BE753611A; GB1324094A; DE1938021B2

Abstract

A metal sliding window having a plurality of relatively movable sash means positioned in a common plane when in a closed position and in parallel planes when in an opened position. The sash means each include a frame composed of identical integrally formed profiled frame parts U-shaped in cross section and adapted to receive window panel means between the parallel flanges of the frame parts. Each of the frame parts also has at least one rib extending outwardly from the base part thereof and cooperates with the stop flanges on the guide profiles and the centering flanges on the centering profiles. Grooves are provided in the guide profiles and receive rollers secured to the sash means to permit said relative movement between the sash means.

Description

United States Patent Gartner 51 Oct. 3, 1972 [54] METAL SLIDING WINDOW [73] Assignee: Joseph Gartner & Co., Gundelfingen/Danube, Germany [22] Filed: July 23, 1970 [21] Appl. N0.: 57,632

[30] Foreign Application Priority Data July 26, 1969 Germany ..P 19 38 021.3

[52] U.S. Cl ..49/128 [51] Int. Cl. ..E05d 15/20 [58] Field of Search ..49/128, 129, 501

[56] References Cited UNITED STATES PATENTS 1,975,187 10/1934 Aberle et al ..49/128 1,441,673 1/1923 Fiola ..49/128 3,429,075 2/1969 Grossman ..49/501 Primary Examiner-Kenneth Downey Attorney-Woodhams, Blanchard and Flynn [57] ABSTRACT A metal sliding window having a plurality of relatively movable sash means positioned in a common plane when in a closed position and in parallel planes when in an opened position. The sash means each include a frame composed of identical integrally formed profiled frame parts U-shaped in cross section and adapted to receive window panel means between the parallel flanges of the frame parts. Each of the frame parts also has at least one rib extending outwardly from the base part thereof and cooperates with the stop flanges on the guide profiles and the centering flanges on the centering profiles. Grooves are provided in the guide profiles and receive rollers secured to the sash means to permit said relative movement between the sash means.

12 Claims, 13 Drawing Figures PATENTEDnms I972 3.694.959

sum a nr 8 INVENTOR K/I/PZ GAP/W58 Maw/W PMENTED 0m 3 I972 SHEET 6 OF 8 IN VEN TOR mp1 awn/5 PATENTEnnm 3 1972 3,694,959

sum

7 or 8 INVENTOR KARL GAKf/VL MQKMVZ 9% III/7,64%

METAL SLIDING WINDOW The invention relates to a metal sliding window with sashes positioned in a common closing plane, the inside of which has a groove for the window glass and on the outside of which rollers are secured which serve for guiding on a frame. 7

Known metal sliding windows of this construction have a series of disadvantages. The sashes consist as a rule of hollow profiles which are expensive to manufacture. Furthermore a greater number of profiles for the sashes and frames is required. In addition, in case of larger sliding windows or also in case of greater wind pressure, all profiles of the sashes and frame s must be reinforced, that is, must be manufactured with larger cross sections. Furthermore, the known metal sliding windows can be manufactured only with certain limited dimensions. The elements of both the sashes and also the frames have relatively large widths. In this manner large cooling surfaces are encountered which in the caseof the high heat-transfer coefficient of aluminum not only brings about considerable cooling losses which must be replaced by supplying heat inside of the building but the surfaces of the inwardly facing sashes and frames cool considerably so that even at a relatively low room humidity water condenses on the window frames, or in case of low outside air temperature ice is formed on the inside of the window frames. Furthermore, the sashes of the known sliding windows bear outwardly against the frame so that in case of high wind pressures the frame parts of the window can bend inwardly and the windows develop leaks.

The basic purpose of the invention is to produce metal sliding windows overcoming the abovemenitoned deficiencies, which sliding windows are distinguished by a simple construction and also a'great stability so that the manufacture of sliding windows having a great width and height becomes possible. Furthermore cold bridges are reduced to a minimum through a special profiling and the formation of condensed water on the inside is substantially prevented. Finally a perfect scaling is achieved which is effective even in case of high wind pressures.

The purpose is attained according to the invention substantially through a metal sliding window which is characterized by a U-shaped narrow sash which has at least one rib on the outside, the depth of which is a multiple of the sash width and has flanges which are used for securing bolts carrying the guide rollers, and is further characterized by a frame consisting of two guide elements with grooves for the guide rollers and a stop flange and of two cross elements each having two flanges. I

The invention is discussed more in detail hereinafter in connection with exemplary embodiments illustrated in the drawings, in which:

FIG. 1 is a vertical cross-sectional view of a vertical sliding window installed in a curtain wall;

FIG. 2 illustrates a detail of FIG. 1 in a natural scale;

FIG. 3 is a cross-sectional view along the line III-III of FIG. 2;

FIG. 4 is a horizontal cross-sectional view of the vertical sliding window of FIG. 1 with opened window sectrons;

FIG. 5 is a view in direction V of FIG. 4;

FIG. 6 is a vertical cross-sectional view along the line Vl-Vl of FIG. 5;

FIG. 7 is a horizontal cross-sectional view of a vertical sliding window arranged as a window band; 7

FIG. 8 is a partially cross-sectional view of a sash comer; I

FIG. 9 is a view of a horizontal sliding window arranged in a window frame;

FIG. 10 is a horizontal cross-sectional view along the line X-X of FIG. 9;

FIG. 11 is a cutaway portion of FIG. 10 of an enlarged modified construction; FIG. 12 is a horizontal partially cross-sectional view of a sliding window according'to FIG. 10 at the height of the locking mechanism;

FIG. 13 is a vertical cross-sectional view of the lower part of the sliding window of FIG. 10 with opened window sections.

Two window sections 1 and 2 are provided one above the other in the vertical sliding window as shown in FIGS. 1 to 10. The same narrow U-shaped element 3 with thick flanges 48 is provided for all elements of these sashes (FIG. 4). The flange thickness S is relatively large and corresponds approximately to the flange width b This U element has therefore a great stability. The flanges 48 are used for securing guide bolts 49 with guide rollers 18. Furthermore, at least one flange 4, 4' (FIG. 10) or 4a (FIG. 11), that is, two centering flanges according to FIGS. 1-4, are provided on the outside of the'profile 3.

The frame consists of two component shapes, namely two elements of one shape comprising narrow profiles 5 and two elements of another shape comprising profiles 6, which have

guide grooves

16 and 50 for the sashes l and 2 are positioned in the lower. and upper frame profile 5 but that, due to the effect of the wind pressure W, the inner positioning flanges 4 are supported on the inner flanges 7a of the profiles 5. Thus, when the wind pressure increases, the, sealing is not reduced but is instead increased. This support of the frame profiles 3 on the profiles 5 has the further advantage that the wind pressure does not cause a bending of these frame elements, thus, same can have correspondingly small dimensions b and"t. The forces transmitted from the profiles 3 onto the profiles 5 are received easily by these narrow profiles 5 which have a great depth T. As shown in FIG. 4, the depth T is a multiple of the profile width .a with which the outside air comes into contact. Also the depth t of the U- shaped sash element is a multiple of its width b. The

sashes l and 2 project thereby outwardly approximate-.

ly at a flange thickness opposite the

outer web

7, 7a of the frame elements. The window sections are thus moved outwardly with respect to the frame. Through this, the smallest cooling surfaces of the frame in the -width a are exposed to the outside and very large heat absorbing surfaces of the frame toward the inside. The relationship between the cooling surface and heatabsorbing surface is in this illustrative construction approximately 125.6. Thus, also in the case of low outside temperatures, any formation of condensed water on the inside of the frame is avoided and at the same time the heat losses are considerably reduced.

A similar situation-exists for the sashes since in the case of these, due to a narrow construction of the profiles 3 in the width fb, only a very narrow cold bridge exists. If necessary, in case of unusually low outside temperatures, any formation of condensed water orice on the frame can be prevented by arranging a heating cable 8 (see FIGS. 4 and 7). 7

As shown in FIGS. 1 and 2, an additional element 9 is arranged between the abutting profiles 3a and 3b of both sashes l and 2, which additional element 9 is secured to the sash which can be swung inwardly in direction IA, namely the profile 3a, whereby the other sashv or the profile 3b is supported with the outer locating flange 4 indirection of the wind pressure W on said-additional element 9 at 10. In the illustrated advantageous embodiment, the additional element 9 is constructed as a substantially rectangular hollow 7 member which is open at llat one longitudinal side and has arranged therein a central lock. This central lock is constructed for simultaneous movement of both The guide surfaces 17 of said groove have advantageously a greater width v which is substantially greater than the thickness W of the frame. Not only wide guide surfaces 17 areformed therewith for the 1 guide rollers 18 butalso wide support surfaces for the tie rods through which the sashes are urged in direction: B with the positioning flanges 4 against the outer'flange 7'of the frame6 and aperfect sealing is achieved therewith.

Theracks 14 which are rigidly connected to the tie rods 15 consist advantageously of a flat steel provided with slots 19. In the illustrated embodiment a rail 20 is arranged in the hollow member 9 and nuts 21 are arranged-in the rib of sash 3a, which nuts are used for securing the'hollow member 9 by means of bolts 22 which penetratethrough the rail 20. The handle 12 is i rigidly connected toa shaft 23 which carries the pinion l3 and is advantageously supported in a bronze bushing 24 and theend of which is supported on the rail at'25. In order to act in direction C against the tilting forces occurring during the movement of the lower sash 2, a bar 26 can-advantageously be provided on the hollow 7 member, whichlbar engages a corresponding groove of the rail 20.

SInce the support'flange 4 of the upper window seci tion 3b is supported in its entire length at 10 on the add itional member 9 of .the window section 3a the wind pressure W actswith an even distribution onto the sash members so that a bending moment is produced which is one half of "the bending moment in known sliding windows at which the wind pressure is transmitted as a 60 single force from one window section to the other window section. In the above embodiment; the additional member 9forms a substantial reinforcement of the section 3aagainst bending. It is possible to manufacture very large or very wide vertical sliding windows having a width of '3 m. and more withfithe construction of the invention. If, in case of very, large windows, areinforce-s mentais required, then, due tothe advantageous sup- 4 port of the sashes on the lowerjand upper frame member 5 as described above, only a reinforcement of thehorizontal sash members 30 and 3b is required which reinforcement can be obtained by enlarging the section depth t," if necessary, also by additional com ponents. The appearance of the window is thus'practk, t g j cally unchanged since the profile width b can be f maintained.

As shown in FlGS. 4 to 6, both sashes 1 and 2 are r v each suspendedlatboth' sides on a cable 27 which is guided over a cable pulley 28; This pulley which has a very flat construction and has a larger diameter D of,

for example,.9 cm. is arranged on the insideof each vertical frame. element 6, whereby the pulley bearing is secured in-the support rail 29 arranged in the guide groove 16 of the members6. Both thecable pulley 28 and also the pulley .bearing'30 are made of sheet metal. i

. The cable'pulley 28 hasa hub 31, the diameter d of which is approximately half of the size of thepulley diameter D; The pulley bearing consists of a sheet- 7 metal plate 30 and has a bearing hub 32 which engages the pulley hub 31. A bronzebearin'g sleeve 33 is desirably arranged between'these two hubs. Further,

the plate 30 has aflange 34, 35 on its top and bottom. Thesetwo flanges grip, as shown in FIG. 6, over the support'rail 29 and are supported on the frame 6. The

bearing plate 30 is connected to the support rail 29-by means of screws 36. This support rail is preferably supported for vertical movement in thefguide groove 16 and a vertical setscrew 37' is provided which is sup-I ported on the-lower end of the'support rail 29 and which is arranged screwably in a plate 38 secured in the guide groove 16. For receiving this plate, suitable recesses 39 can'be provided on the floor frame profile as shown in FIGS. As can be taken from the drawings this embodiment results in an extremely flat and space saving construction of the. pulley bearing. Since the sashes l and 2 have a greater center-to-center distance,

it is also possibleto provide a pulley with a greater diameter D forja tension member for which a wirev cable of a smaller thickness can be used because the bending radius r is relatively large.

In the embodiment of FIGS 1 4,the hollow ribs 40 I I which form the outer guidegrooves 16 have a greater width x'whereby these hollow ribsare used-for securement on the curtain wall. The frame elements, i

with the interposition of permanently elastic insulating and'sealing strips 43, 44, can be held on the steelvertical members 41 and horizontal members 42 by means of connecting strips 45 which are connected to the vertical members and horizontal members by means of screws indicated at 46. It is thereby also possible to f secure panels 47 with this clamping securement.

As can be seen from the drawing, the thick flanges 48 of the sash profile 3 are not only used for guiding and supporting the tie rods 15 (FIGS. 2 and 3) but are also used for receiving the guide rollers 18. Bolts-'49 are screwed into the flanges 48, which bolts carry the guide rollers 18. These guide'rollers 18 (FIG. 1) can slide in 5 the two

grooves

16 and 50 which are provided verti-.

cally in the frame and the connecting

grooves

51, 52.

After opening the lock with the handle 12, the lower sash 2 can be swung inwardly and can then be moved upwardly with the two guide rollers 18 into the groove 50, whereby the upper section 1 moves simultaneously downwardly.

FIG. 7 illustrates the construction with full-length window elements. The abutting

frame elements

6, 6 have two outer flanges 58, 59 which together with the hollow rib 40, 60 (which form the guide grooves 16, 50) form grooves for receiving two profiles 61 permanently elastic material which connect the two frame elements 6 and 6'.

As illustrated in FIG. 2, the outer flanges 48 of the U- shaped sash element have a groove 62 for forming a drip edge 63. Thus, the flanges form the otherwise additionally required weather legs of the sliding window.

As illustrated in the drawings, particularly in FIGS. 7 and 8, the two flanges 48 can have cylindrical longitudinal channels 64. They are used to receive screw bolts 65 which rigidly connect each two abutting sash elements.

The above-described invention is not only suitable I for vertical sliding windows but can also be applied to horizontal sliding windows as illustrated in FIGS. 9 to 13. Here too, only the above-described U-shaped profile 3' is required for the sashes l and 2', which U- shaped profile has, in the embodiment illustrated'in FIG. 10, only an outer positioning rib 4', while the other positioning is formed by the edge 4" of the inner flange 48 which cooperates with the inner positioning flange 7 of the vertical frame elements 5. The individual parts of this horizontal sliding window are identified by the above-mentioned reference numerals with the addition of a prime mark. The double glass of the wings is identified with 66. The window section l of the horizontal sliding window can have an elastic disk buffer 67 which is arranged in a recess of the profile flange 48. I

In place of two positioning ribs 4 on the sash (FIG. 1), only one single positioning rib 4a may alternatively be provided on said sash. Such an advantageous embodiment is illustrated in FIG. 11. A rib which forms a rounded-off angular section 4a and which cooperates with the two positioning flanges 7a of the frame element 5' is provided on the section profile 3'. Further, an elastic seal 68 can be secured advantageously on the outer flange 7a and also on the stop flange 7, as shown in FIG. 7, through which seal the manufacture tolerances are balanced and a still better sealing is achieved.

The angle section rib 4a makes it possible, for opening the sash 2', to swing same in direction C without appreciable force whereby, during closing of the window against the direction C, it is possible to obtain a pressing of the angle section against the seal 68.

The above-described arrangement of only one locating flange 4a on the sash and the arrangement of the seals 68 on the frameelements can be provided not only in a horizontal sliding window but also in a vertical sliding window of the above-described construction.

According to FIG. 13, trough-shaped guide rollers 18' are provided which roll in the guide grooves 16', 50' and slide on the bottom of said guide grooves.

The above-described exemplary embodiments'show that the basic purpose of the invention is clearly attained with these embodiments. The sliding windows'of the invention are distinguished by a very simple construction due to the few simple shapes required. The narrow elements used for both the sashes and also the frame components are also desirable from an esthetic point of view and represent also in this respect an important step forward compared with known constructions.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

l. A metal sliding window having a pair of relatively movable sashes positioned in a common plane when in a closed position and in parallel planes when in an opened position, comprising:

a window frame comprising a pair of elongated identical opposed guide profile members joined at their-ends to a pair of elongated identical opposed centering profile members to define a rigidrectangularframe, 7

each of said guide profile members having inwardly opening, front and rear, parallel grooves and a pair of transverse connecting grooves 7 extending between said front and rear grooves, said connecting grooves being spaced apart in the lengthwise direction of said guide profilemembers, said guide profile members also having coplanar stop flanges projecting inwardly toward each other forwardly of said front grooves,

said centering profile members having front and rear, coplanar, transversely spaced centering flanges projecting inwardly toward each other, the outer centering flanges being coplanar with said stop flanges;

each of said sashes comprising four elongated, substantially identical, profiled parts joined at their ends to form a rectangular sash disposed within said frame, said sash parts each having front and rear, parallel, inwardly projecting, transversely thick flanges joined by an integral outer base part thereby to define a U-shaped cross section, the transverse depth of said sash part being several times the dimension thereof parallel to the plane of the window, the flanges of said sash part being of a transverse dimension substantially equal to their dimension parallel to the plane of the window, said sash parts mating so that their flanges define a recess for receiving a closure panel, each of said sash parts also having at least one rib extending outwardlyfrom said base part, said ribs being positioned rearwardly of and in overlapping relationship with said stop flanges and said front centering flanges and being adapted for sealing contact therewith, the pair of sash parts adjacent the centering profile members being received between said centering flanges thereof;

a pair of longitudinally spaced fasteners secured to and extending through the rearward flanges of the pair of opposing sash parts of each sash adjacent said guide profile members, said fasteners on one sash being spaced apart the same distance as the connecting grooves where they connect to the front groove, said fasteners extending outwardly 7 from said base part; I I v rollers rotatably mounted on said fasteners and received in said grooves, the rollers on said one sash being movable through said connecting grooves between said front and rear grooves whereby to permit relative movement of said sashes between said closed position and said open position.

V a. an additional profile which has a substantially rectangular hollow'cross section, which is-arranged between the abutting sash parts of said sashes and secured to the sash part of one sash and which extends over the entire length of the afore-, mentioned sash part and wherein the rib of the other sash'is supported on said additional profile; i

b. two tie rods whichiare supported longitudinally movably in said additional profile and the outer ends of which each engage said forward grooves of said frame, and 7 c. a plurality of racks engaged witha pinion, said racks being secured at the inner ends of said tie rods and, said pinion being rotatably secured to saidadditional profile and adapted to effect, a

movement of said tie rods when rotated.

4. Metal 1 sliding window according to claim 3,. wherein saidracks consist of a flat steel having slots therein in which the teeth of said pinion engage.

5.1 Metal sliding window according to claim 3,,

wherein saidadditional hollow profile is opened along one longitudinal side so that on this side said tie rods and said rack are guided on said sash part of said one sash. r

6. Metal sliding window according to claim 3, including a rail mounted in said hollow profile and nuts mounted in the sash part of said one sash, said rail having'a plurality of holes therein aligned with said nuts 7 and adapted to receive screw bolts for securing said 7 ,hollow profile to saidsash part.

7. Metal sliding window according to claim 1,

wherein said sashes are" relatively movable vertically and include pulley means having a large diameter and arranged on the inside of one of said guide profile members, a supportrailmounted in said frontgroove of said guide profile member, a bearing -member secured to said support rail for'rotatably supporting '9 said pulley means, and a rope running over said pulley means and from which said sashes are suspended.

[8. Metal sliding window according to claim '7, wherein said'pulley means consist of sheet metal and have a central portion having a diameter (d) which is approximately half of the size of thediameter of said pulley means, and roller bearing plate means consisting of a'sheet'metal plate having a central portion which engages the central portion of said pulley means. 7 V

9. Metal sliding window according to claim. 8, wherein said roller bearing plate means has a bend on g the top and bottom thereof, said bends being mounted on said guide profile member and grip over said support rail. i

10. Metal sliding window according to 1 claim 7, wherein said support rail is supported for vertical adjustable movement in said front groove and vertical setscrew means positioned adjacent the lower end of said support rail and secured to a plate mounted in saidi f I front groove.

11. Vertical sliding window according to claim 7, wherein said window frame elements are secured to panels on a steel post and flanges of a curtain wall by connecting strips, and the outer contour of said groove meansdefining hollowribs have a large width and means for securing said hollow rib to said curtainwall.

12. Metal sliding window according co claim 1,

wherein said rib on said sash parts has a rounded-off 7

Claims

1. A metal sliding window having a pair of relatively movable sashes positioned in a common plane when in a closed position and in parallel planes when in an opened position, comprising: a window frame comprising a pair of elongated identical opposed guide profile members joined at their ends to a pair of elongated identical opposed centering profile members to define a rigid rectangular frame, each of said guide profile members having inwardly opening, front and rear, parallel grooves and a pair of transverse connecting grooves extending between said front and rear grooves, said connecting grooves being spaced apart in the lengthwise direction of said guide profile members, said guide profile members also having coplanar stop flanges projecting inwardly toward each other forwardly of said front grooves, said centering profile members having front and rear, coplanar, transversely spaced centering flanges projecting inwardly toward each other, the outer centering flanges being coplanar with said stop flanges; each of said sashes comprising four elongated, substantially identical, profiled parts joined at their ends to form a rectangular sash disposed within said frame, said sash parts each having front and rear, parallel, inwardly projecting, transversely thick flanges joined by an integral outer base part thereby to define a U-shaped cross section, the transverse depth of said sash part being several times the dimension thereof paralleL to the plane of the window, the flanges of said sash part being of a transverse dimension substantially equal to their dimension parallel to the plane of the window, said sash parts mating so that their flanges define a recess for receiving a closure panel, each of said sash parts also having at least one rib extending outwardly from said base part, said ribs being positioned rearwardly of and in overlapping relationship with said stop flanges and said front centering flanges and being adapted for sealing contact therewith, the pair of sash parts adjacent the centering profile members being received between said centering flanges thereof; a pair of longitudinally spaced fasteners secured to and extending through the rearward flanges of the pair of opposing sash parts of each sash adjacent said guide profile members, said fasteners on one sash being spaced apart the same distance as the connecting grooves where they connect to the front groove, said fasteners extending outwardly from said base part; rollers rotatably mounted on said fasteners and received in said grooves, the rollers on said one sash being movable through said connecting grooves between said front and rear grooves whereby to permit relative movement of said sashes between said closed position and said open position.

2. Metal sliding window according to claim 1, wherein said sashes project approximately a flange thickness forwardly from said stop flanges.

3. Metal sliding window according to claim 1, including a. an additional profile which has a substantially rectangular hollow cross section, which is arranged between the abutting sash parts of said sashes and secured to the sash part of one sash and which extends over the entire length of the aforementioned sash part and wherein the rib of the other sash is supported on said additional profile; b. two tie rods which are supported longitudinally movably in said additional profile and the outer ends of which each engage said forward grooves of said frame, and c. a plurality of racks engaged with a pinion, said racks being secured at the inner ends of said tie rods and said pinion being rotatably secured to said additional profile and adapted to effect a movement of said tie rods when rotated.

4. Metal sliding window according to claim 3, wherein said racks consist of a flat steel having slots therein in which the teeth of said pinion engage.

5. Metal sliding window according to claim 3, wherein said additional hollow profile is opened along one longitudinal side so that on this side said tie rods and said rack are guided on said sash part of said one sash.

6. Metal sliding window according to claim 3, including a rail mounted in said hollow profile and nuts mounted in the sash part of said one sash, said rail having a plurality of holes therein aligned with said nuts and adapted to receive screw bolts for securing said hollow profile to said sash part.

7. Metal sliding window according to claim 1, wherein said sashes are relatively movable vertically and include pulley means having a large diameter and arranged on the inside of one of said guide profile members, a support rail mounted in said front groove of said guide profile member, a bearing member secured to said support rail for rotatably supporting said pulley means, and a rope running over said pulley means and from which said sashes are suspended.

8. Metal sliding window according to claim 7, wherein said pulley means consist of sheet metal and have a central portion having a diameter (d) which is approximately half of the size of the diameter of said pulley means, and roller bearing plate means consisting of a sheet metal plate having a central portion which engages the central portion of said pulley means.

9. Metal sliding window according to claim 8, wherein said roller bearing plate means has a bend on the top and bottom thereof, said bends being mounted on said guide profile member and grip over said support rail.

10. Metal sliding window accorDing to claim 7, wherein said support rail is supported for vertical adjustable movement in said front groove and vertical setscrew means positioned adjacent the lower end of said support rail and secured to a plate mounted in said front groove.

11. Vertical sliding window according to claim 7, wherein said window frame elements are secured to panels on a steel post and flanges of a curtain wall by connecting strips, and the outer contour of said groove means defining hollow ribs have a large width and means for securing said hollow rib to said curtain wall.

12. Metal sliding window according co claim 1, wherein said rib on said sash parts has a rounded-off angle profile.