FR2653820A1 - BALL BEARING FOR MECHANISM WITH MANIFOLD FOR MANEUVERING BLINDS AND SHUTTERS. - Google Patents

Abstract

Ball bearing for a crank mechanism for operating blinds and roller shutters comprising a support (13) which can be screwed onto a wall (1) and a covering part (12), the support and the covering part being joined together in shape matching using a snap lock. The snap lock consists of recesses (21) in the covering part and anchors on side branches (28, 29) of the support, the anchors penetrating into the recesses. The screw holes of the support (24, 25) are oblique, so that the screws (5', 5") do not penetrate into the wall passage (2).

Description

The present invention relates to a spherical bearing for a

  crank mechanism for operating blinds and shutters.

  The common ball bearings have a large base area and therefore allow a comfortable screwing on the wall and a sufficiently large screw pull resistance. Currently, the market desires substantially smaller base surfaces of the spherical bearings. A simple reduction is not satisfactory because the screw at the top is too close to the hole in the wall, which allows the passage of the crank pin, so that only a very short screw can be used, which provides insufficient pull-out resistance. The bottom screw can not be screwed because the universal joint clogs the seat

necessary for screwing.

  For aesthetic reasons, screws arranged obliquely do not

can not be used.

  The object of the present invention is to avoid the aforementioned drawbacks of the known solutions, by producing a ball bearing in which the screws are plugged and therefore can be screwed obliquely when necessary and in which the mechanism to

  crank is only installed after screwing is completed.

  This object is achieved, in the case of a swivel bearing of the aforementioned type, in that it comprises a support that can be screwed onto the wall and a covering and passage part, the latter being joined in correspondence of shapes. to support by a lock

latching.

  Other features and features of the invention

  will emerge from the description which follows, in which, using

  of an exemplary embodiment shown in the drawings, the object of

  the invention is described and explained in detail.

  Figure 1 is a section of a ball bearing according to the invention

  with connection parts partially shown.

  Figure 2 is an exploded representation of the spherical bearing with

  connection parts partially shown.

  Figure 3 is a side elevation and section of the spherical bearing.

  Figure 4 is a section along line IV-IV of Figure 3.

  Figure 5 is a top view of the support.

  The wall 1 in Figure 1 has a passage 2, which is traversed by a polygonal plug rod 3. On the wall 1, a ball bearing 4 is fixed with screws 5, 6. It carries, as indicated, a crank handle 7, which is connected, via a cardan joint 8 and a rotating sleeve 9, to the polygonal plug-in rod 3. The parts 3, 7, 8 and 9 form the crank mechanism . The rotating sleeve 5 is rotatably disposed in an oscillating bearing 10. The latter is oscillatingly disposed in the ball bearing 4 and allows the polygonal plug-in rod 3 to be mounted at an angle 11 determined by the construction. The polygonal plug rod 3 drives a blind mechanism, not shown. The spherical bearing 4 is composed of a passage covering portion 12 and a support 13. The first one can be made for example of stainless steel plate and the second can be made of plastic for example. Figure 2 shows more particularly the pivots 14, 15 of the oscillating bearing 10, which are arranged in the corners 16, 17 of the covering portion 12 and the cylindrical segments 18, 19 of the

support 3.

  3 shows a longitudinal section in the plane of symmetry III-III (FIG. 4) through the covering portion 12. A passage 20 is shown which is filled in the mounted state by the oscillating bearing 10 and one two recesses 21, 22, with the transverse surfaces 21/1, 22/1 (FIGS. 3 and 4) important for the

  locking latch according to the invention.

  Figures 3, 4 and 5 show the support 13 with the cylindrical segments 18, 19, the holes of the screws 23, 24, 25 and the anchors 26, 27 important according to the invention. These have a base area a little smaller than the recesses 21, 22 and have an oblique wedge-shaped top edge 26/1, 27/1. The length and width of the base surface of the support (Figure 5) are a little more

  smaller than the inner length and width of the

  overlap 12, the width measured above the anchors 26, 27 being

  greater than the inside width of the overlap portion 12.

  When the latter rises for example to 18 mm, the width measured above the anchors 26, 27 may be 19.6 mm. The lateral branches 28, 29, carrying the anchors 26, 27, are made of a suitably selected material, of sufficient ionizer and of non-excessive thickness so that the width measured above the anchors, can be compressed by deformation. Elastic material on the inner width of the covering portion 12. After screwing the support 13 on the wall and placing parts 3, 7, 8, 9 and 10 shown in Figures 1 and 2, the covering portion 12 is screwed on the support 13; thanks to a slight pressure exerted on the covering part 12, it compresses elastically, thanks to the oblique upper edges 26/1, 27/1 the lateral branches 28, 29 until the width above the anchors 26 , 27 is smaller than the internal width of the covering portion 12. The latter then slides on the support 13 until the outer profile 13/1 of the support 13 positions in shape matching the internal profiling 12/1 of the covering portion 12. The relative positions of the recesses 21, 22 and anchors 26, 27 are determined

  so that the second ones snap freely into the first ones.

  The anchor surfaces 26/2, 27/2 as well as the transverse surfaces 21/1, 22/1, all of which are approximately orthogonal to the sliding direction 30, prevent by form-locking, that the overlap 12 can move in the opposite direction to the direction of sliding 30. A disassembly is for example possible using a clamp, which compresses the two

anchors 26, 27.

  Figures 2 and 5 show that the upper screw holes 24, 25 with their screw head supports are oblique, so that the screws 5 ', 5 "are oblique in the wall and do not enter the passage 2. Thus screws of great length can be used, which

  provide sufficient resistance to tearing.

Claims (6)

CLAIMS V E N D I C A T IO N S   1. Spherical bearing for a crank mechanism (3, 7, 8, 9) for operating blinds and shutters, characterized in that it comprises a support (13) which can be screwed onto the wall and a part of recovery and passage (12), the latter being joined in   shape matching to the support by a latching lock.   Ball bearing according to Claim 1, characterized in that the locking latch consists of recesses (21, 22) in the covering part (12) and anchors (26, 27) on the lateral branches ( 28, 29) of the support (13), the anchors penetrating into the recesses. Ball bearing according to Claim 2, characterized in that the width of the support measured above the anchors (26, 27) is smaller, thanks to an elastic deformation of the lateral branches (28, 29), than the inner width of the overlap portion, this   last can be slid over the support.   4. Spherical bearing according to claim 3, characterized in that the recesses and the anchors have facing facing surfaces (21/1, 22/1, 26/2, 27/2), which are approximately angled straight with respect to the direction of sliding, as well as outer profiled surfaces (13/1) on the support and inner profiled surfaces (12/1) in the covering part, arranged opposite and, which position in correspondence of shapes. the support and the covering part.   5. Ball bearing according to claim 4, characterized in that the anchors have upper edges (26/1, 27/1) which are arranged obliquely wedge-shaped and, during the sliding of the covering part, compress the anchorages until the measured width on these is smaller than the inner width of the covering part.   6. Spherical bearing for a crank mechanism (3, 7, 8, 9) for operating blinds and shutters, which covers a passage of 6 2653820   wall penetration, and is equipped with screw holes for attachment to a wall, characterized in that at least two screw holes (24, 25) are arranged sufficiently obliquely, so that their screws (5 ', 5 ") born   do not enter the crossing passage (2).