FR2787495A1 - IMPROVED TROLLEY FOR SLIDERS, LIKE DOOR, WINDOW, OR THE LIKE - Google Patents

Abstract

A roller carriage for a sliding unit such as a door or window consists of a one-piece body with a system for attaching it to the sliding unit and containing rollers (3, 30) able to rotate freely about their axes (5, 6). The body has a transverse member (17) carrying a pivot in the form of a thrust member (4) with a pointed tip (10) interacting with a corresponding component in the sliding unit to confer a certain degree of freedom on the carriage. In addition, the upper edges (7, 8) of the body slope downwards slightly from the transverse member (17) to its two ends (19, 20).

Description

IMPROVED TROLLEY FOR SLIDERS,

  DOOR, WINDOW, OR THE LIKE

  The present invention relates to carriages which are more particularly mounted on doors or windows so that they slide on rails or the like, for example the French windows of certain dwellings, which are called under the generic term of sliding doors, and relates more particularly to sliding carriages of the type

  comprising a body, means of connection to said sliding, means of bearings.

  The carts of the prior art comprise at least two rollers, rollers, or the like, and more generally two, mounted rotatably on a yoke which is itself linked to the carriage body with at least one degree of freedom, the body being to it completely connected to the slide in an appropriate housing thereof by means of screw-type connection

blocking.

  Thus, a sliding carriage is already known, which comprises a body formed from a first part, for example substantially hollow cylindrical, open on two opposite sides, and a yoke generally formed into a second part substantially in the shape of a "U", this second part being mounted in rotation relative to the body being located in the hollow part thereof. The yoke generally supports two rollers which are rotatably mounted on the second part by means of an axis so that they can emerge from the body and the yoke in order to be able to cooperate with a rail or the like. Under these conditions, it is the body which is fixed to the slide, and immobile with respect to the latter, the yoke retaining a degree of freedom in rotation to allow the two rollers to be

  always in perfect contact with the rail.

  This type of cart works perfectly. However, although perfected or produced in multiple variants, it is an organ presenting a certain complexity due to its double structure: a body allowing a fixing on the sliding and a connection to the clevis,

  and a yoke carrying the rollers, rollers or the like which is mounted articulated on the body.

  Hence a relatively high cost price, and the possibility of malfunction due to

  example to a screed seizure on the body.

  The object of the present invention is therefore to produce an improved slide carriage which, moreover, overcomes the drawbacks mentioned above. More specifically, the invention relates to a slide carriage, comprising a monobloc body, means for connecting the body to the slide, bearing means comprising at least first and second free rollers rotating around a first and a second axis of rotation respectively, articulation means making it possible to give the body a connection with at least one degree of freedom with the slide, said articulation means comprising a support positioned on an upper part of the body, said support being constituted by at least two points intended to be in contact with the slide, said at least two points defining a rectilinear range parallel to said at least first and second axes of rotation, release means making it possible to give the body a determined clearance in sliding around said straight span, said carriage being characterized in that said one-piece body comprises a cross section carrying the articulation means, complementary to a cross section of the slide in which said body is intended to be placed, said cross section being able to cooperate with said connecting means to allow a translational connection of said carriage in

said sliding.

  The body of the trolley according to the present invention is intended to be linked to the sliding in the operating position with at least one degree of freedom, thus making it possible to eliminate the yoke of the trolleys of the prior art as described above. The production cost of a trolley according to the invention is thus greatly reduced by eliminating a part.

  expensive whose function has been advantageously transferred to the carriage body itself.

  Thus, the rollers or rollers will remain permanently in contact with the rail on which the slide is intended to move, by the mobility of the carriage body linked to the slide according to at least one degree of freedom. The trolley according to the invention advantageously allows a quick connection and a reduced cost in the sliding, thanks to a translation connection obtained in the sliding by the cooperation of a complementary cross section of

  that of the sliding with the connecting means.

  According to an advantageous characteristic, said means of connection to said slide comprise at least one needle screw acting on the slide at the contact of

said straight range.

  The needle screw allows, by reaction during its screwing which puts it under pressure against the sliding, a contact of the lower part of the transverse section of support of the body against the sliding. Such immobilization of the carriage is provided for example for the transport of the slide so that the carriages do not move inadvertently in the profile in which they are inserted. A carriage thus immobilized can have a certain resistance to its deflection in rotation around the support by friction of the lower part of the support section on the slide; however, when placing the slide on its sliding rail, the weight of the slide will cause the needle screw to penetrate deeper into the slide, thereby slightly and sufficiently releasing the lower part of the body support section, reducing or thus canceling friction

  to improve the rotation of the body when sliding around the straight span.

  According to another advantageous characteristic, the cross sections of said body, taken on either side of the support section towards the ends of said body, respectively, are of a decreasing height symmetrically to a horizontal median plane. According to another advantageous characteristic, said release means are defined by two first and two second inclined planes starting from said support section. According to an advantageous characteristic of the previous one, said first and second inclined planes form respectively with said horizontal plane, an angle belonging to

the interval] 0, 5].

  According to another advantageous characteristic, said at least first and second axes

  of rotation are fixed relative to said body.

  According to another advantageous characteristic, said rectilinear bearing is positioned at

  equal distance between said first and second axes of rotation.

  According to another advantageous characteristic, said at least first and second axes of rotation are defined respectively by a first and a second shaft fixed respectively to said body by crimping means at least partially reversible

  allowing disassembly of said first and second rollers.

  Other characteristics and advantages will appear on reading the description which

  follows of an exemplary embodiment of a sliding carriage, according to the invention, accompanied by the accompanying drawings, example given by way of illustration and without any

  restrictive interpretation of the invention cannot be drawn from it.

  FIG. 1 represents a perspective view of an exemplary embodiment of a

  sliding carriage according to the invention.

  FIG. 2 represents a side view of the carriage of FIG. 1.

  FIG. 3 represents a sectional view along line I-I of the carriage of FIG. 1.

  4 shows a sectional view along the line Il-fI of the carriage of Figure 1.

  FIG. 5 represents a top view of an element of the carriage of FIG. 1.

  Figure 6 shows a sectional view along the line mI-ImI, of the carriage element

  of Figure 5, in which the crimping means have been shown.

  FIG. 7 represents a sectional view along line II-II of the carriage of FIG. 1,

  mounted in a slide itself placed on a rail.

  The slide carriage 1 shown in FIGS. 1 to 4 and 7 comprises a body 2, means of connection 10 to the slide 1, bearing means 3, 30, articulation means 4 making it possible to give the body 2 a link to at least one degree of freedom

with the sliding.

  As shown in Figure 7, the carriage is mounted on the lower cross member of the slide 1 shown in thin lines, to allow movement of the slide by rolling on a rail 22. For this purpose, the slide 1 is provided in any known manner , a housing 25 formed in the lower profile 21 of the slide 1, the housing 25 generally being of constant section over the entire length of the slide in order to allow positioning of the carriages, in general two carriages, appropriately distributed over the sliding length. Once the carriages are correctly positioned, the connection means 10 make it possible to avoid any sliding of the carriages in the housing 25. As will be explained in detail below, the connection means 10 of the carriage to the slide 1 must allow the means to joint 4 to give body 2 a connection to a degree of

  freedom at least with the sliding 1.

  The bearing means comprise a first 3 and a second 30 rollers, free to rotate around a first 5 and a second 6 axes of rotation respectively, the latter being fixed relative to the body 2 and defined respectively by a first 23 and a second 24 shafts fixed respectively to the body 2 by crimping means 12, 13 partially reversible allowing disassembly of the first 3 and second rollers 30,

  as will be explained later.

  The body 2 of the carriage consists of a one-piece element advantageously made of a single material, preferably obtained from a metal profile, as shown in FIGS. 5 and 6. The body 2 advantageously adopts a generally hollow cylindrical shape and comprises a central part 26 from which extend from one side

  and the other two wings 27 and 28, each carrying a roller, as shown in FIG. 1.

  The vertical forces exerted by the slide 1, in particular by its weight, are therefore taken up by the rollers 3, 30, the wings 27 and 28, and the central part 26 carrying the articulation means 4 as will be explained below. Each wing 27 and 28 consists of two arms 27a, 27b, and 28a, 28b, respectively, advantageously allowing a mounting in a yoke of the roller, as shown in Figure 1 for example. The ends of the arms of each wing 27, 28, situated substantially at the ends 19 and 20 of the body 2, are connected by ribs 29, 31 respectively so as to give the body 2 good rigidity and correct maintenance of the rollers 3, 30. The ribs 29 and 31 can be hollowed out in their

  central part and above the rail on which is intended to roll the carriage, if necessary.

  As shown in Figures 1 and 5, the central portion 26, as well as the ribs 29 and 31 of the end of the body 2 extend laterally and symmetrically advantageously beyond the arms 27a, 27b, and 28a, 28b, up to a length complementary to the width of the housing 25 of the slide 1 so as to advantageously ensure lateral support of the carriage in the slide housing. An appropriate minimum clearance is however observed so that the carriage can slide in the housing 25 of the slide 1 when positioning the carriage before its connection to the slide, and can allow the articulation means 4 to operate. The central part 26 and the ribs 29 and 31 of the end of the body 2 further advantageously extend laterally beyond the arms in order to allow easy adaptation of the trolley according to the invention according to the different widths of the sliding used, by a adjustment as described above of the lengths of the central part 26 and of the ribs 29 and 31 to the width of the sliding housing for which it is intended. The articulation means advantageously comprise a support 4 positioned on an upper part 11 of the body 2, and the carriage comprises release means 7, 8 on either side of the support 4 making it possible to give the body 2 a clearance determined in slide 1 around this support. The support 4 is constituted by a rectilinear bearing 9 parallel or substantially parallel to the first 5 and second 6 axes of rotation of the two

  rollers 3, 30, and positioned at equal distance between the first and second axes of rotation.

  It should be noted that, alternatively, the support constituting the articulation means 4 may consist of at least two points (not shown) formed on the upper surface of the carriage body and appearing a rectilinear bearing by the generated line by these two points. The body 2 is thus articulated in the sliding advantageously according to a degree of freedom, a rotation of substantially horizontal axis around the straight line 9. In order for this rotation to be possible, the body 2 advantageously has clearances 7 and 8 preferably symmetrical on either side of the bearing surface 9, allowing freedom of rotation greater than 0 and preferably less than or equal to 5, preferably equal to about 1, from

  on either side of a vertical plane passing through the bearing 9.

  The release means 7 and 8 can advantageously be constituted by a first 15 and a second 16 inclined planes starting from the support 4 and forming respectively with a horizontal plane 14, an angle cc belonging to the interval] 00, 5 ]. It should be noted that the release means can be obtained in any other known way, for example by an upper surface of the body 2 adopting any form suitable for a release for the rotation of the body around the support 4, for example a surface horizontal plane (not shown) situated at a level lower than that of the support 4 on the central part 26 which could for example be formed in relief on said horizontal plane surface. The body 2 advantageously comprises a cross section 17 carrying the articulation means, complementary to a cross section 18 of the housing 25 of the slide 1 in which the body 2 is intended to be placed, the cross sections of the body 2, taken on either side of the support section 17 towards the ends 19, 20 of the body, respectively, being of a decreasing height symmetrically to a horizontal median plane 14. The support section 17 complementary to that 18 of the housing 25 in the slide 1 allows, thanks to the connecting means 10, to prevent a sliding of the carriage in the housing 25, by partial immobilization of the central part 26 of the body 2

  in slide 1, as will be explained later.

  The means of connection to the slide I advantageously comprise a needle screw acting on the slide at the level of the articulation means 4. As shown in FIGS. 1, 2, and 3, the needle screw 10 is placed vertically in the central part 26 of the body 2, in order to act on the slide by screwing. The needle screw head can be accessible with any known gripping means, of the hexagon wrench type or the like, from below the body 2, in order to immobilize, by screwing an imprint in the upper part of the slide, in particular substantially vertically the central part 26 of the body by reaction and adhesion in the slide 1. It should be noted that this immobilization may be only partial depending on the tightening force of the needle screw, allowing rotation with friction of the central lower part of the body in the profile. Several trolleys according to the invention can thus be blocked or partially

  immobilized in a slide during transport for example.

  It should be noted that when the carriage is in charge of the weight of the slide 1, that is to say bearing on the bearing 9 of the body, the lower part 39 of the central part 26 of the body 2, more particularly of the cross section 17, is no longer adhering to the slide 1 and no longer rubs on the latter; the carriage is then no longer prevented from sliding in the housing 25 of the slide 1 except by the needle screw 10 creating, in cooperation with the impression formed by screwing in the slide, a point of immobilization at the level of the straight range 9 Thus, the rotation of the body 2 is improved by reducing or eliminating friction, according to angular values determined by the clearances 7 and 8 as explained above and below, while allowing immobilization in translation of the

sliding carriage.

  The decreasing sections of the body 2 towards its ends 19 and 20 respectively, allow in combination with the central part 26 of the body 2 comprising a section complementary to that 18 of the housing 25 of the slide 1, to provide the clearances 7 and 8 necessary for rotation of the carriage in the sliding. As more particularly shown in FIGS. 2 and 3, the body 2 thus adopts a general external contour symmetrical with respect to the horizontal median plane 14 passing through the axes 5 and 6 of rollers, when these

  the latter have the same outer diameter.

  The shafts 23 and 24 of the rollers 3, 30 are respectively connected in a complete manner to the body 2 by crimping, as appears more particularly in FIG. 6, and will be explained in detail below. The body 2 has on the inner face of each arm 27a, 27b, 28a, 28b a vertical groove in which is inserted the corresponding end of the corresponding shaft. In what follows, with the help of FIG. 6, the fixing by crimping of the second shaft 24 will be described, it being understood that the first shaft 23 is also fixed by crimping in a similar manner. In Figures 5 and 6 the tree 24 has been

  shown in dotted lines for a better understanding of the binding.

  The shaft 24 is immobilized upwards in the grooves 35a, 35b respectively produced in the arms 28a, 28b, by means of two upper stops 36a and 36b acting respectively on each of the ends of the shaft 24. The stops 36a and 36b are for example produced by deformation of the wall of the corresponding arm constituting the groove bottom, by punching or the like, in order to form towards the inside of each arm a projection forming a stopper on which the shaft can rest, for example as shown in Figure 6. The upper stops 36a and 36b will be large enough and

  solid to support the weight part of the slide which acts on the shaft 24.

  The shaft 24 is then placed in abutment on the upper stops 36a and 36b, then at each end of the shaft 24 and under the latter, two lower stops 37a, 37b are produced on the arms 28a, 28b respectively, in order to immobilize and crimp the tree in

  translation, and also preferably in rotation, in the grooves 35a and 35b.

  The lower stops 37a, 37b are produced for example in the same way as the upper stops 36a and 36b, with the difference that the lower stops are advantageously smaller and less solid because they do not have to support a sensitive load and must be able to be removed by crushing or dulling, when pulling down on the roller or on the axis of the latter, in order to ensure the replacement of this or these latter, if necessary. Each lower stop 37a, 37b could for example be

  consisting of two light punches placed close to each other.

  The upper and lower stops at the ends of the first 23 and of the second 24 shafts as described above constitute the crimping means 12, 13 of the first

and second trees respectively.

  Each roller or caster will preferably be mounted on its shaft by means of a bearing in order to significantly reduce friction, for example a bearing with

  needles 38 as shown in Figure 7.

Claims (8)

  1. Trolley for sliding (1), comprising a monobloc body, means for connecting the body to the sliding, rolling means comprising at least a first (3) and a second (30) free rollers rotating around a first (5) and a second (6) axis of rotation respectively, articulation means making it possible to confer on the body a connection with a degree of freedom at least with the slide, said articulation means comprising a support (4) positioned on an upper part (11) of the body (2), said support being constituted by at least two points intended to be in contact with the slide, said at least two points defining a straight range parallel to said at least first and second axes of rotation, release means (7, 8) making it possible to give the body a determined clearance in the slide around said straight bearing, said carriage being characterized in that said one-piece body (2) comprises a s transverse section (17) carrying the articulation means, complementary to a transverse section (18) of the slide in which said body is intended to be placed, said transverse section being able to cooperate with said connecting means (10) to allow   a translational connection of said carriage in said slide.   2. Trolley according to claim 1, characterized in that said connecting means to said sliding (1) comprise at least one needle screw (10) acting on the sliding   at the contact of said rectilinear bearing (9).   3. Trolley according to claim 1 or 2, characterized in that the cross sections of said body, taken on either side of the support section (17) towards the ends (19, 20) of said body, respectively, are of decreasing height   symmetrically to a horizontal median plane (14).   4. Trolley according to claim 3, characterized in that said release means are defined by two first (7) and two second (8) inclined planes   starting from said support section (17).   5. Trolley according to claim 4, characterized in that said first (7) and second (8) inclined planes respectively form with said horizontal plane (14), a   angle (c) belonging to the interval] 0, 5].   6. Trolley according to any one of claims 1 to 5, characterized in that   said at least first (5) and second (6) axes of rotation are fixed relative to said body (2).   7. Trolley according to any one of claims 1 to 6, characterized in that   said rectilinear bearing (9) is positioned at equal distance between said first (5) and second (6) axes of rotation.   8. Trolley according to any one of claims 1 to 7, characterized in that   said at least first (5) and second (6) axes of rotation are defined respectively by a first (23) and a second (24) shafts fixed respectively to said body (2) by crimping means (12, 13) to the less partially reversible allowing disassembly   said first (3) and second (30) rollers.