FR2844292A1 - GUIDING DEVICE AND FALL ARREST FOR TILTING DOOR - Google Patents

Abstract

The present invention relates to a guiding and fall guard device for a tilting door, comprising on the one hand guide means (5) by translation in a rail (14) including a roller (5) and fixed to the door by means of securing (4), and on the other hand a chute (6), characterized in that said fixing means (4) and said chute (6) are linked so as to allow a degree of freedom in rotation of the shield fall relative to said securing means (4).

Description

GUIDING DEVICE

  AND FALLING RAIL FOR TILT DOOR

  The present invention relates to a guiding device and fall arrester for overhead door. The tilting doors of the most common type are set in motion by four guiding and driving devices, each secured to one edge of the door and able to move in two pairs of rails 10, respectively horizontal and vertical, situated in each side of the door. It goes from a vertical closed position to a position

  horizontal open, and vice versa.

  These guiding devices are each connected by a strap against a weight and / or a motor system.

  In the event of rupture of the strap or the attachment means of the strap on the device, there is provided a security system, commonly known as a fall arrest device, which makes it possible to block and hold the overhead door, and thus to prevent its fall on a person or a vehicle.

  It is known according to the prior art to make such devices comprising a rod whose one end is connected to the door and on the other end of which is mounted on the one hand a roller for guiding, and on the other hand a 25 fall chute formed of a parallelepiped end element having three parts: - a first truncated distal portion, forming a locking means; a second portion at the other end, including a transverse bar on which the strap is fastened, and a third central portion pivotally mounted on said rod, against a return spring, along an axis transversal to

that of the stem.

  The spring tends to keep the pare chute obliquely relative to the axis of the rod, when it is subjected to any other force than that of the spring.

  When the element is in place in its rail and connected by the strap to the counter weight system, it exerts a force placing said element 10 perpendicular to said rod.

  As a result, the device can slide freely in its rail of complementary shape. In case of rupture of the strap for example, the device is no longer connected to the counterweight system and the pare chute returns, by the action of the spring of

recall, in an oblique position.

  The presence of regularly spaced lights on the rail then allows the par chute, namely its truncated portion, to fit into the first light on its path, and thus to prevent the

fall of the door by holding it back.

  Known guidance and fall arrest devices have a first disadvantage.

  Once the device in the rail and connected to the overhead door, it can not, the pare chute being fixed by a transverse bar, to rotate on

its central axis.

  This results in significant constraints on the stem and the chute, mainly in the form of friction on the rail, as they cause the removal of material at the truncated end of the

  fall as well as at the stem.

  The device can then seize and prevent or interfere with the operation of

the overhead door.

  The device according to the present invention proposes to eliminate these friction and constraints and thus to guarantee a longer operating time and presenting risks of breakage and damage.

reduced galling.

  Furthermore, the present invention provides a device that is easy and inexpensive to make and assemble.

  To this end, according to the invention, the guiding and falling device for a tilting door, comprising on the one hand translation guiding means in a rail including a roller and fixed to the door by securing means, and on the other hand a fall arrester is characterized in that said fixing means and said fall arrester are connected so as to allow a degree of freedom in rotation of the fall arrester with respect to said

means of securing.

  Advantageously, said securing means and the fall arrest are connected by a ball joint and the securing means consist of an axis rod (X-X), on one end of which is

  mounted to free rotation said roller.

  Preferably, the rod passes through the center of the ball joint located in the central portion of said dropper, and said roller has an axis

  collinear (X-X) to the longitudinal axis of the stem.

  More particularly, a strap is connected to said chute by means of

  fastening means and said strap is connected to a counterweight system exerting a force (F) perpendicular to the longitudinal axis (X-X) of the rod.

  Advantageously, said drop chute is articulated on the rod along an axis (ZZ) perpendicular to the longitudinal axis of the rod against a return spring, so that it is in a plane perpendicular to the axis (XX) of the rod when the pare chute is subjected to said force F, and the spring returns the pare chute in an oblique plane relative to said axis

  longitudinal (X-X) when it is not subjected to said force (F).

  More specifically, said roller and said fall arrester are made of plastic, preferably injected and the fall arrester includes a central portion including a bearing made of injected plastic material adapted to receive the ball joint.

  The invention will be better understood in the light of the description which follows, relating to an illustrative and in no way limiting example of the invention, in

  reference to the accompanying drawings in which: - Figure 1 shows a side view of the device according to the invention with the pare chute obliquely relative to the axis of the rod; FIG. 2 is a view from below of the device of the invention; FIG. 3 shows a cross-sectional view of the device of FIG. 1, the chute being perpendicular to the rod; Figure 4 is a cross-sectional view of the device of Figure 1 in a figure. rail and associated with a strap; and

  - Figure 5 is a front view of the device in the associated rail.

  The invention is described in the example of a swinging door movable by four guide rollers each integral with an edge of the door, and able to move in two pairs of rails respectively horizontal and vertical, located on each side Door. This changes from a closed vertical position to a horizontal open position, and vice versa. With reference to FIG. 1, the device according to the invention consists of three elements, a fastening element 1 on the edge of a tilting door (not shown), an element 2 serving as a guide in a complementary shape rail. (not shown), and an element 3 forming

  fall arrest. The Y-Y axis of the rail is perpendicular to the axis of the rod 4.

  The securing element 1 consists of a cylindrical rod 4, of longitudinal axis X-X, the free end 4A secured to the door, either directly or by a member (not shown) connected to the door. The stem 4

  is ideally made of brass.

  The guiding guide element 2 consists of a roller 5 mounted to rotate freely on said rod 4 along an axis of rotation collinear with the axis X25 X. The element 3 of the chute is in the form of a block 6 substantially parallelepipedic. The fall arrest block 6 comprises: a first part at one end, forming blocking means 7 of the door; > a second portion at the other end, provided with fastening means 8 of a strap 9 connected to a counterweight system and / or motor drive (not shown); and> a central portion 10 through which the chute 6 is fixed on the rod 4. The locking means 7 is truncated in the direction

  opposite to the other fastening end 8 of the strap.

  The fastening means 8 include a bar 8A to which is attached

the strap 9.

  The dropper 6 is articulated on one end of the rod 4 by a ball joint symbolized by a truncated sphere 1.

  This articulation ball allows a rotational movement of the pare chute 6 relative to the rod 4, according to an axis of rotation ZZ (Figure 2) perpendicular to both the axis XX of the rod and the YY axis of the rail of guidance.

  This rotation is made against a return spring 12, preferably of the single wire type spirally wound on two side trunnions 13A and 13B, located along the axis ZZ on either side of the part 25 central 10 of the chute 6.

  The dropper 6 can move in rotation around the axis ZZ, between two extreme positions: a first collinear position to the axis YY of the rail (FIG. 3), that is to say perpendicular to the axis XX, and a second position (FIG. 1) oblique with respect to the axis XX and inclined by an angle of

  300 (maximum 450) from the Y-Y axis of the rail.

  The fall arrester 6 is in an oblique position (FIG. 1) with respect to the axis XX when it is not subjected to any force other than that of the return spring 12. This corresponds to the case where the fall arrester is not connected to the strap 9, or the strap 9 is loose and loose, following its accidental breaking by

example.

  The ball joint 11 (between the rod 4 and the chute) also allows a rotational movement of the dropper 6 with respect to the rod 4 along the X-X axis thereof. The rod 4 can thus move on its axis X-X

  regardless of the movements of the fall arrest guard 6.

  If the guard drops 6 encounters an obstacle or hindrance to effect a rotational movement on the X-X axis, even if its movement is stopped,

the rod 4 continues its rotation.

  Thus, the possible rotational forces experienced by the rod 4 during the opening of the door are not fully transmitted to the bumper 6. FIG. 2 is a view from below of the device according to the invention. chute 6 includes a bearing 1OA parallelepiped and provided with a central housing adapted to receive the

  11 sphere of articulation between the rod 4 and the chute 6.

  The bearing 10A is secured, on the central portion 10 of the scrap chute 6, by plastic injection, for example at a temperature of 300-350 OC under

a pressure of 300 bars.

  Figure 3 shows a cross-sectional view of the device according to the invention. The dropper 6 is shown in a position perpendicular to the axis X-X, that is to say when it is connected by the strap 9 to a counterweight or a motor system 1o (not shown) to move in translation the

  device, so the overhead door, along a rail.

  The dropper 6 thus undergoes a force F perpendicular to the axis X-X and parallel to Y-Y. Since the return force of the spring 12 is much lower than the force F, the resultant force acting on the dropper is almost identical to the force F which keeps the slide 6 down.

  perpendicular to the X-X axis (Figure 3).

  In the event of rupture of the strap 9, this force F is no longer applied and the baffle 6 remains subjected to the sole force of the spring 12 which recalls it.

oblique position (Figure 1).

  The chute 6 in the position shown in Figure 3 (when it undergoes the force F transmitted by the strap), can slide by translation in a rail 14, 25 as shown in Figures 4 and 5 The rail 14 is a profile, of preferably aluminum, which has, in cross section seen in Figure 5 (in section in a plane perpendicular to the axis YY) a general shape and dimensions adapted to accommodate the roller and the pare chute 6. In Figure 5, the strap is not shown for

reasons for clarity.

  The rail comprises a bottom 14A (transverse to the X-X axis), two lateral flanks 14B and 14C parallel to the X-X axis, each provided with a

  bulge 14D and 14E (substantially in an arc) for the roller 5.

  Each bulge is extended (on the opposite side to the bottom 14A) by a

  back 14F and 14G parallel to the bottom 14A (perpendicular to the axis X-X).

  The bottom 14A has regularly spaced rectangular slots 15 of complementary shape to the truncated end portion 7.

from the chute 6.

  The spacing of the lateral flanks 14B and 14C of the rail 14 is slightly greater than the diameter of the roller 5.

  The height of the rail 14 (in the plane of Figure 5 which is perpendicular to the axis YY) is such that, placed in the rail 14 with the tension F exerted on the strap, so on the pare chute 6 , the device (roller 5 and 20 pare chute 6) moves in translation along the axis YY.du rail without obstacle or almost friction More specifically, the spacing between the bottom 14A of the rail 14 and the distal face of the pare chute 6 allows the latter not to interfere with the bottom 14A and in particular the lights 15. The opening of the tilting door is done by switching on motor means, known per se and not shown, which, thanks to a system against weight and the strap, put in motion the whole

  chute / roller, and then drives the door.

  The pare chute 6 then remains in a position perpendicular to the X-X axis

  (Figure 3), as the strap 9 is stretched.

  If the strap 9 breaks or the tension of it becomes zero or very weak, the spring 12 brings back the chute 6 in an oblique position (FIG. 1) and then the truncated portion 7 of the chute chute fits into the first of the

  lights 15 lying on its way in the rail 14.

  In the opposite direction, the fastening portion 8 of the strap fits into one of the lights 15 and prevents the door from continuing its movement,

to fall.

he

Claims (10)

  1. A guiding and falling device for a tilting door, comprising on the one hand guiding means (5) by translation in   a rail (14) including a roller (5) and fixed to the door by securing means (4), and on the other hand a chute (6), characterized in that said securing means (4) and said Fall arrest (6) are linked in such a way as to allow a degree of freedom in rotation of the chute 10 with respect to said securing means (4).   2. Device according to claim 1, characterized in that said securing means and the chute are connected by a joint with ball (1 1).   3. Device according to claim 1, characterized in that the securing means consist of a rod (4) of axis (X-X), on a   ends of which is mounted to free rotation said roller (5).   4. Device according to claims 2 and 3, characterized in that the axis   (X-X) of the rod (4) passes through the center of the ball joint located   in the central portion (10) of said chute.   5. Device according to claim 3 or 4, characterized in that said roller (5) has an axis collinear with the longitudinal axis (X-X) of the rod (4).   6. Device according to one of the preceding claims, characterized in   a strap (9) is connected to said chute (6) by fastening means (8A).   7. Device according to claim 6, characterized in that said strap (9) is connected to a counterweight system exerting a force (F)   perpendicular to the longitudinal axis (X-X) of the rod (4).   8. Device according to claims 3, 6 and 7, characterized in that said   fall chute is articulated on the rod (4) along an axis (ZZ) perpendicular to the longitudinal axis of the rod (4) against a return spring (12), so that it is in a plane perpendicular to the axis (XX) of the rod (4) when the chute (6) is subjected to said force F, and that   the spring (12) brings the chute down into an oblique plane with respect to said longitudinal axis (X-X) when it is not subjected to said force (F).   9. Device according to one of the preceding claims, characterized in that said roller (5) and said chute (6) are made of plastic, preferably injected.   10. Device according to claims 2 and 9, characterized in that the pare   chute (6) includes a central portion (10) including a bearing (10A) of injected plastic material adapted to receive the ball (11) of the joint.