FR2790785A1 - MECHANICAL SAFETY DEVICE TO PREVENT PINCHING OF FINGERS WHEN CLOSING A DOOR - Google Patents

Abstract

To avoid the jamming of fingers accidentally placed on the frame, a door is equipped with a first protection device 12 comprising a locking piece 24 secured to the bolt 20 and capable of coming into engagement against a stop 26 when the bolt 20 is engaged. is protruding in the inactive state of the handle 16. The stop is formed by a stud fixed to the frame 14 at a predetermined height close to that of the bolt 20 so as to stop the door before the closing limit switch. A second protection device is provided with at least one tubular element mounted in the rear gap in vertical alignment with the hinges to constitute a non-deformable static screen during the entire travel of the door.

Description

Mechanical safety device to prevent jamming of

  fingers when closing a door.

  Technical Field of the Invention The invention relates to a mechanical safety device for a door, which is pivotally mounted in a frame, and provided with an actuating handle connected by a mechanical transmission link to a bolt, said device being equipped with means for preventing fingers from being trapped when the door is closed, and comprising: - a first protective device arranged to stop the door before the closing limit switch when the actuating handle is in an inactive state, and a second protection device intended to prevent access to the gap

  formed on the hinge side between the frame and the rear edge of the door.

  STATE OF THE ART The risks of pinching fingers between the door and the support frame can occur on the side of the closing handle, and on the side of the hinges following a

  voluntary or involuntary slamming of the door without the intervention of the handle.

  The known systems for implementing the first protection device causing the door to lock before complete closing, generally use a rubber block supported by a fastening member, in particular a cable or a stirrup, or an elastic spring stop. . To authorize the normal closing of the door, it is necessary to remove these abutment parts by a manual unlocking action, which is different from the gripping action of the actuating handle. to the active state. The door closing operation then requires the intervention of both hands of the operator, with the risk of hand jamming if the manual unlocking action

  intervenes simultaneously or just before the door arrives.

  Document FR-A-2745026 describes a security device for a door, comprising a locking member that can be moved from a security position to an erasing position under the gripping action of the actuating handle. Such a mechanism is complicated, because it requires a link

  auxiliary mechanics, in addition to the bolt linkage.

  The production of the second protection device on the hinge side conventionally uses an articulated flap, or a flexible bellows which deforms as a function of the pivot angle of the door. Such devices are described in documents FR-A-2620484, 2565622, and 2646460, and have a

  significant bulge in the open position of the door.

  OBJECT OF THE INVENTION The object of the invention consists in producing a reliable mechanical safety device, which can be easily neutralized with one hand when closing

  normal door, and easily adaptable to any type of door.

  The device according to the invention is characterized in that the first protection device comprises a locking piece subject to the bolt and capable of coming into engagement against a stop when the bolt is projecting in the inactive state of the handle, said stop being formed by a stud fixed to the frame at a predetermined height close to that of the bolt. The second protection device is advantageously provided with at least one tubular element mounted in said gap in vertical alignment with the hinges to form a non-deformable static screen during the entire travel.

moving the door.

  The locking part is erased automatically when the bolt is removed during normal door closing. One hand is useful for this operation, and it is not necessary to use a special mechanism to lock and unlock the safety of the first protection device. At the second protection device, the coaxial arrangement of the tubular element with the hinges avoids any bulging effect

when opening the door.

  According to a preferred embodiment, the locking piece is formed by a prismatic element of plastic or metallic material, attached to the bevelled part of the bolt by presenting a straight support face extending

  parallel to the longitudinal direction of movement of the bolt.

  The locking piece can be fixed to the bolt by any means of assembly

  mechanical, in particular by screwing, riveting, or by gluing.

  According to a characteristic of the invention, the prismatic element of the locking piece is provided with a retaining lug formed on the oblique face, and intended to be engaged in an orifice drilled in the bevelled face of the bolt to improve the holding. shear. The retaining lug is cylindrical, and the insertion hole of the lug extends perpendicular to the direction of

moving the bolt.

  The locking piece can be constituted by the rectilinear face of the bolt after 180 of the latter has been turned over with respect to the longitudinal direction of the door. According to another characteristic of the invention, each tubular element of the second protection device has a diameter close to that of each hinge, and is provided with a flat fixing tongue, the assembly being shaped according to a rigid plastic profile. or flexible can be

  assembled either to the frame or to the door.

Brief description of the drawings

  Other advantages and characteristics will emerge more clearly from the

  description which will follow of an embodiment of the invention given as

  non-limiting example, and shown in the accompanying drawings, in which: - Figures 1 and 2 are schematic views of the first safety device respectively in the erasing position and in the abutment position in the active and inactive state of the operating handle; - Figure 3 shows a detailed view of the locking piece adaptable to the bolt; Figure 4 is a plan view of Figure 3; - Figures 5 and 6 show partial views of Figure 2 illustrating two alternative embodiments of the bolt; - Figure 7 is a schematic view of the second safety device arranged on the visible side of the hinges; - Figure 8 shows a sectional view along line 8-8 of Figure 7 when the door is open; - Figure 9 is a schematic view of the third safety device arranged on the non-visible side of the hinges; - Figure 10 shows a sectional view along line 10-10 of Figure 9 when the door is open; - Figure 11 is an identical view to Figure 10 when the door is closed; - Figures 12-14 are views similar to Figures 9-11 of an alternative embodiment.

  Description of a preferred embodiment

  With reference to FIGS. 1 and 2, a hinged door 10 is equipped with a first protective device 12 intended to prevent the fingers of a hand from being caught inadvertently placed in line with the frame 14 in the closing zone located on the

  side of the operating handle 16.

  A mechanical link 18 of transmission connects in a conventional manner the actuating handle 16 to the bolt 20, which normally engages in a keeper 22 provided in the fixed frame 14 to immobilize the door in the closed position. This action of completely closing the door 10 is only possible if the actuating handle 16 is voluntarily moved to an active state.

  biasing the bolt 20 to a cleared position (Figure 1).

  The first protective device 12 comprises a locking piece 24 subject to the bolt 20, and capable of coming into engagement against a stop 26 of the frame 14 to prevent the complete closing of the door 10 when the

  latch 20 is projecting in the inactive state of the actuating handle 16.

  This locking position of the door 10 at the end of the closing stroke is illustrated in FIG. 2, and leaves sufficient space 28 between the vertical front edge 30 of the door 10 and the frame 14 by preventing any jamming of fingers. The stop 26 is formed by a stud fixed by a screw at a predetermined location in the frame 14, at a height corresponding to that of the bolt 20 of the

door 10.

  The locking piece 24 is formed by a prismatic element made of plastic or metallic material, attached to the bevelled face of the bolt 20 so as to have a straight support face 30 extending parallel to the longitudinal direction of movement of the bolt 20. The assembly of the locking piece 24 on the bolt 20 can be operated by any fixing means,

  in particular by gluing, screwing, riveting or welding.

  Any movement of the door 10 in the closing direction is automatically stopped when the bearing face 30 arrives against the stop 26 in the inactive state of the actuating handle 16. The interval delimited by the space 28 is determined by the length of the stop 26 projecting from the frame 1 0 14. The stopping of the door 10 occurs a few centimeters before the end of the closing stroke, avoiding the jamming of the fingers between the door 10 and the frame 14 on the side of the actuating handle 16. The complete reclosing of the door 10 is only authorized after the passage of the actuating handle 16 to the active state, after a voluntary pivoting maneuver causing the retraction of the bolt

1 5 20 in its housing.

  In FIGS. 3 and 4, the prismatic element of the locking piece 24 is provided with a cylindrical retaining lug 32 formed on the oblique face 34. The retaining lug 32 is introduced into an orifice drilled in the bevelled face of the bolt 20 to improve the shear resistance of the locking piece 24 during mechanical impacts on the stop 26. The insertion hole of the lug 32 extends

  perpendicular to the direction of movement of the bolt 20.

  According to a variant (not shown), the prismatic element of the locking piece 24 can be assembled to the bolt 20 by a screw inserted in a

threaded bolt hole 20.

  In FIG. 5, the locking piece 24 is constituted by the bolt 20 itself

  same, after 180 reversal of the latter relative to its position of the

figure 2.

  With reference to FIG. 6, the bolt 20 of the door 10 closure system has a rectangular section over its entire length, one of the faces serving

  from the front bearing against the stop 26.

  The actuating handle 16 of the door 10 according to Figures 1 and 2 is advantageously constituted by a pivoting lever requiring voluntary operation for the transition from the inactive protrusion state to the active erasure state

of the bolt 20.

  To prevent the passage of the bolt 20 to the active state, in particular when hooking a child to a crutch handle, it is possible to orient and maneuver the pivoting lever in two different ways: - either arranged vertically by turning them a quarter turn upwards, avoiding any leverage effect (case of Figure 1); - either positioned horizontally in a conventional manner, but requiring the

  raising the lever to clear the bolt 20.

  To avoid jamming of the fingers between the frame 14 and the rear vertical edge for supporting the hinges, the door 10 is equipped with additional protection means arranged opposite the actuating handle.

16 in the longitudinal direction.

  Referring to Figures 7 and 8, a second protection device 40 arranged on the visible side of the hinges 42, 44, comprises tubular elements 46 in the form of elongated profiles. These tubular elements 46 are mounted in vertical alignment with the hinges 42, 44 so as to permanently plug the small gap 45 formed between the frame 14 and the rear edge 48 of the door 10 during the pivoting of the latter. Each tubular element 46 has a diameter close to that of the hinges 42, 44, and is provided with a flat fixing tongue 50 which can be assembled either to the frame 14 (in the case of FIG. 8), or to the door 10. The elements tubular 46 are staggered between the hinges 42, 44 over the entire height of the door 10, and are advantageously made of rigid or flexible plastic material. The fitting of the fixing tongue 50 can be carried out by any assembly means,

in particular by gluing or nailing.

  In FIGS. 9 to 14, a third protection device 52 is provided opposite the tubular elements 46, being arranged on the non-visible side of the hinges 42, 44 between the rear edge 48 of the door 10 and the rebate of the frame. 14. It comprises a strip 54 of flexible or semi-rigid material of small thickness, extending over the entire height of the door 10, and fixed to the frame 14 by one of its ends 56. During the pivoting of the door 10, the strip 54 is driven in a relative sliding movement by deforming angularly in the zone to be protected, and remaining substantially parallel with respect to the adjacent face 58 of the door 10. The sliding of the strip 54 is provided by a guide member 60, 62 secured to the face 58 of the door 10 so as to provide a predetermined clearance. The strip 54 has a high mechanical resistance, and is produced, for example, from a plastic material based on

  polystyrene, polyurethane, or chlorinated polymers or others.

  The guide member 60 according to FIGS. 9-11 is constituted by a plastic plate 64 fixed to the upper part and to the lower part of the door.

  by assembly rods 66, 68.

  The guide member 62 according to FIGS. 12-14 comprises a tube 70 of cylindrical section arranged slightly set back from the edge of the door 10, and extending

  vertically in the height direction. The tube 70 can be rigid or semi

  rigid, and is fixed to the door 10 by suitable fastening means 72 guaranteeing the clearance to allow the sliding of the strip 54, without risk of

injure fingers.

  Depending on the type of doors, it is clear that the strip 54 can be fixed to the movable door 10, and the guide member 60, 62 is secured to the fixed frame 14. The pivoting handle 16 can of course be replaced by a rotating strap or

any other gripping device.

Claims (10)

Claims   1. Mechanical safety device for a door (10), which is pivotally mounted in a frame (14), and provided with an actuating handle (16) connected by a mechanical connection (18) for transmission to a bolt (20), said device being equipped with means for preventing fingers from being trapped when the door is closed (10), and comprising: - a first protective device (12) arranged to stop the door before the end of the stroke closing when the actuating handle (16) is in an inactive state, - and a second protection device (40) intended to prevent access to the gap formed on the side of the hinges (42, 44) between the frame (14) and the rear edge (48) of the door, characterized in that the first protection device (12) comprises a locking piece (24) secured to the bolt (20) and capable of coming into engagement against a stop ( 26) when the bolt (20) protrudes in the state handle (16) inactive, said stop being formed by a stud fixed to the frame (14) at a predetermined height close to that of the bolt (20), and that the second protection device (12) is provided with at least a tubular element (46) mounted in said gap in vertical alignment with the hinges (42, 44) to form a non-deformable static screen during the entire travel of moving the door.   2. Mechanical safety device according to claim 1, characterized in that the locking piece (24) is formed by a prismatic element of plastic or metallic material, attached to the bevelled part of the bolt (20) having a face of rectilinear support (30) extending parallel by   relative to the longitudinal direction of movement of the bolt (20).   3. Mechanical safety device according to claim 2, characterized in that the locking piece (24) is fixed to the bolt (20) by means   mechanical assembly, in particular by screwing, riveting or welding.   4. Mechanical safety device according to claim 2, characterized in   that the locking piece (24) is fixed to the bolt (20) by gluing.   5. Mechanical safety device according to one of claims 2 to 4,   characterized in that the prismatic element of the locking piece (24) is provided with a retaining lug (32) formed on the oblique face (34), and intended to be engaged in an orifice drilled in the bevelled face of the bolt (20) to improve shear strength.   6. Mechanical safety device according to claim 5, characterized in that the retaining lug (32) is cylindrical, said orifice for introducing the lug   (32) extending perpendicular to the direction of movement of the bolt (20).   7. Mechanical safety device according to claim 1, characterized in that the locking piece (24) is constituted by the rectilinear face of the bolt (20), that is to say after turning 180 of the latter relative to the longitudinal direction of the door (10), either by using a section bolt rectangular.   8. Mechanical safety device according to claim 1, characterized in that each tubular element (46) of the second protection device (12)   has a diameter close to that of each hinge (42, 44).   9. Mechanical safety device according to claim 8, characterized in that each tubular element (46) is provided with a fixing tab (50)   plate can be assembled either to the frame (14) or to the door (10).   10. Mechanical safety device according to claim 9, characterized in that the tubular element (46) and fixing tab (50) assembly is   shaped according to a rigid or flexible plastic profile.