CH627224A5 - - Google Patents

Description

The subject of the present invention is a device for suspending a suspended sliding door closing under the effect of its own weight, in particular for refrigeration installation, and provided for this purpose with at least one roller cooperating with a ramp to spread the door of its frame when it is opened by moving the door parallel to its plane.

Several devices for suspending sliding doors are known. All known devices have one common characteristic: they comprise a fixed rail extending over the entire length of the travel of the sliding door. This rail is either a U-profile rail, as in patent CH No. 581250, or a cylindrical rail, according to patent application DE No. 2151063. In addition, the device described in patent CH No. 581250 is provided with a relatively complicated mechanism to facilitate the upward movement of the door. However, in certain cases, for example in the case of cold storage warehouse doors, the goods are transported on a rail leaving the room where it is stored and the trajectory of which crosses the running rail of the door. It is then necessary to interrupt the door rail to let the butcher rail pass, which complicates the installation and requires additional parts. In addition, the rail must be dimensioned, in the factory, to the length corresponding to the movement of the door, an adaptation on site being generally difficult, if not impossible to execute.

The present invention aims to eliminate the fixed running rail, to simplify the whole device and to make its use and mounting much more flexible, that is to say better adaptable to all door widths.

To this end, the device according to the invention is characterized in that it comprises at least two suspension links hinged to the door around a horizontal axis and rigidly connected by a bent part to a horizontal cylindrical bar, and Rollers, whose axes, at least approximately horizontal, are fixed above the door, these rollers supporting the cylindrical bar by a groove in which the cylindrical bar can move both in translation and in rotation.

The fixed rail is replaced by rollers between which it is without other possibility to pass a transport rail, for example a butcher rail. The number of rollers can be chosen according to the width and weight of the door. The cylindrical suspension bar can be constituted by a simple cylindrical tube, preferably reinforced inside by a tube of polygonal section, for example a square tube. This bar can be cut to length on site, the ends of the tube then being provided with frustoconical end pieces so as to facilitate engagement of the ends of the tube on the rollers. By using rollers in self-lubricating material, for example Delrin (registered trademark), the door is moved almost without friction and silent. All of the suspension elements can be delivered as a kit and mounted without difficulty by the user on doors of different dimensions.

It is also possible to automate the movement of the doors using a short cylinder for initializing the movement, the door then being driven by one or more of the rollers.

The accompanying drawing shows, by way of example, an embodiment of the invention.

Fig. 1 shows a front elevation view of a hanging door.

Fig. 2 shows a partial front view of the suspension device.

Fig. 3 shows a sectional view along III-III of FIG. 2, the suspension link being opposite the rollers so as to also show this link in section.

Fig. 1 shows a suspended door 1 closing an opening 2 of a wall 3. At the upper part of the door are fixed two rods 4 and 5 rigidly secured to a horizontal suspension bar 6 supported by rollers 7,8 and 9 with a horizontal axis, fixed to the wall 3. Next to the opening 2 are fixed two other identical rollers 10 and 11. Above and opposite the rollers 7 to 11 are mounted identical rollers, respectively 12,13,14 , 15 and 16. These rollers 12 to 16 have the function of preventing the derailment of the bar 6. Since, to prevent such a derailment, it suffices that the bar is retained at a point at all times during its movement , it suffices in principle to mount the rollers 13 and 15, the rollers 12, 14 and 16 can be removed. The rollers 12 to 16 are therefore safety rollers and, as such, are optional. It would be possible, to a certain extent, to oppose a derailment by slightly inclining the axes of the rollers 7 to 11. The suspension bar 6 has frustoconical ends 17 and 18 which facilitate the engagement of the end of the bar on, respectively between, the rollers.

The door 1 is further provided, in a manner known per se, with two rollers 19 and 20, of vertical axis, intended to roll on ramps 21 and 22 to separate the door from its frame, as described in the patents CH Nos 557466 and 581250, these ramps being followed respectively by a raceway 23.24. At its lower end, the door is provided, in a manner known per se, with two ramps 25 and 26 cooperating respectively with rollers 27 and 28 fixed to the ground to apply the door, more precisely the seal of the latter, against the frame in the closed position. The door can be opened manually by means of a recessed handle 29. It is generally provided, in a manner known per se, to control a thrust cylinder by means of the handle to initiate the movement of the door, that is to say -to say the rise of the rollers 19 and 20 on the ramps 20 and

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22. The subsequent movement of the door can also be ensured by means of a long-stroke cylinder, but it may be advantageous to ensure this movement by means of one or more of the rollers 7 to 11, for example at means of the roller 9 driven by a motor. The advantage of such a drive is that it is very safe, especially when closing, because if a user is trapped between the door and the frame, the drive roller can without slipping on the suspension bar 6.

We now refer to Figs. 2 and 3. The rollers of the suspension device, for example the rollers 9 and 14, are preferably made of io Delrin (registered trademark) and are mounted, via a ball bearing such as 30, on axes fixed 31 and 32 constituted by bolts, the heads of which are welded to a plate 33 screwed into the wall 3 by means of four bolts 34, 35, 36 and 37. Spacers 38 and 39 ensure the positioning of the ball bearings 15 held by a nut 40. The rollers have a groove 41 of trapezoidal section.

The link 5 consists of several parts so as to simultaneously form a shock absorber. It comprises a casing 42 constituted by a rectangular tube open at its lower part. This casing is closed at its upper part by a plate 43 from which is suspended a rod 44 constituted by a bolt retained by a nut 45 and whose head 46 retains a rectangular block 47 capable of sliding in the casing 42. The rod 44 is surrounded by a spring 48 working in compression between the block 47 and the plate 43. The rectangular block 47 is pierced with a hole 49 over its entire length, hole in which are engaged two axes 50 and 51 fixed in the part 47 by means of two locking screws such as 52 accessible through two holes 53 and 54 formed in the wall of the casing 42. The axes 50 and 51 engage respectively in two vertical wings 55 and 56 of a support plate 57 fixed to a frame 58 of the door 1 by means of bolts. It can be seen that it is possible to adjust the length of the connecting rod, that is to say the position in the vertical direction of the door relative to

its frame, by acting on the nut 45. The axes 49 pass through the lateral walls of the casing 42 through two oblong holes allowing the adjustment, as well as a flap, of the rod 44 in the casing, the spring 48 ensuring a certain flexibility of the connecting rod in the direction of compression.

The cylindrical suspension bar 6 is constituted by a tube of common circular section, for example made of aluminum, reinforced by a tube of square section 59 whose external diagonal is equal to the inside diameter of the tube 6. The tubes 6 and 59 are rigidly connected to the rods, for example to the rod 5, by two bolts 60 and 61, the heads of which rest on the square tube 59 and which pass through the casing 42, a nut being interposed between the casing 42 and the tube 6.

Fig. 3 shows the suspension device while the door is closed. When the door is opened by moving it in the direction of the arrow F1 (fig. 1), the rollers 19 and 20 mount on the ramps 21 and 22 and the door departs from its frame in the approximate direction of arrow F2 (fig. 3). Its articulation with the links 4 and 5 remains at a fixed distance from the tube 6 and drives the tube 6 in rotation about its virtual axis in the direction F3. The movement of the door is therefore a translational movement along a trajectory in an arc of a circle around the virtual axis of the tube 6. Since the suspension rollers roll simultaneously on the tube 6, the movement of the tube on the rollers s 'performs practically without friction. The jolts of the door during a somewhat abrupt closing or opening are absorbed by the springs 48, so that these shocks are not transmitted to the tube 6, to the rollers and to their bearings.

It is obvious that many alternative embodiments can be envisaged without departing from the scope of the present invention. In its simplest form, the suspension rods could consist of a single piece welded or screwed to the tube 6. The bend between the rod and its means of attachment to the tube does not necessarily have to form an angle of 90 °.

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3 sheets of drawings

Claims (7)

627,224 1. Device for suspending a suspended sliding door closing under the effect of its own weight, in particular for refrigeration installation, and provided for this purpose with at least one roller cooperating with a ramp to separate the door from its frame during of its opening by displacement of the door parallel to its plane, characterized in that it comprises at least two rods of 'suspension articulated to the door around a horizontal axis and rigidly connected by a bent part to a cylindrical bar, and rollers, whose axes, at least approximately horizontal, are fixed above the door, these rollers supporting the cylindrical bar by a groove in which the cylindrical bar can move both in translation and in rotation. 2. Suspension device according to claim 1, characterized in that it comprises at least one retaining roller similar to the rollers and whose axis is parallel to the axes of the rollers, and whose groove surrounds the upper part of the cylindrical bar. 2 3. Suspension device according to one of claims 1 or 2, characterized in that the cylindrical bar consists of a circular section tube internally reinforced by a polygonal section tube. 4. Suspension device according to claim 1, characterized in that the profile of the grooves of the rollers is trapezoidal. 5. Suspension device according to claim 1, characterized in that the links are in two parts capable of sliding in one another by compressing a damping spring. 6. Device according to claim 5, characterized in that the rods consist of a tubular part closed at its upper end and in which is mounted a sliding part integral with the suspension axis, and a rod retained by the closed end of the tubular part. 7. Device according to claim 1, characterized in that at least one of the rolling rollers is a drive roller for driving the cylindrical bar.