FR2778648A1 - WINCH FOR TENSIONING A CABLE OF AN ASSEMBLY AS OPENING, SECURITY DEVICE AND INSTALLATION PROVIDED WITH THE WINCH - Google Patents

Abstract

The invention relates to a winch intended for the traction of a cable or the like of a mechanical assembly such as an opening, comprising: - a housing (2); - A winding drum under tension of the cable, mounted so as to rotate relative to the housing (2); - A first shaft (7) for driving the drum in rotation, the first shaft being mounted to rotate relative to the housing about a first axis of rotation; - a second control shaft (10), intended to be driven in rotation by a crank (25) or the like; and- first and second gear parts (14, 15), complementary, provided on the first and second shafts (7, 10).

Description

The invention relates to a winch, intended for the traction of a

  cable or the like of a mechanical assembly.

  The invention also relates to a safety device and an installation provided with the winch. The mechanical assembly is for example an opening, like a fire shutter. The winch is intended to maintain

  the opening closed by pulling on the cable.

  In the event of a fire in the building in which the door is mounted, it must be possible to stop the traction exerted by the winch on the cable, so that the door can open. This opening is caused by an automatic mechanism mounted near the opening and / or by its

own weight.

  Document FR-A-2 605 620 describes a winch comprising a frame in which a pulley and a pinion are mounted

drive.

  A cable intended to be connected to the flap to be moved can be

  wound under tension on the pulley.

  A support mounted oscillating on an axis and carried by the frame

  carries a worm gear engaged with the pinion.

  The worm is mounted in the support by

  via a drive rod.

  The winch comprises an oscillating link for retaining the support in a position in which the worm is engaged with the pinion and an elastic member for returning the support in the direction of the release of the worm relative to the pinion. There is also provided an actuating member of the link for the release of the

  support under the action of the elastic return member.

  The pulley remains immobilized as long as its pinion is in

taken with the worm.

  Such braking is ensured by the judicious choice of the thread pitch so as to obtain an automatic blocking of the

two elements in engagement.

  Immobilization of the pulley under cable tension risks

  therefore to be faulty, in case of wear of the thread pitch.

  Furthermore, the safety of immobilization of the pulley under tension of the cable is subjected to a large number of parts other than the pinion and the worm, which does not

  only increases the risk of default.

  The abrupt release position of the worm with respect to the pinion, allowing the pulley to be unwound under the tension of the cable, is obtained by acting by the actuating member on the link, so as to tilt the support towards the rear under the action of

the elastic return member.

  This winch also has the disadvantage of being of a

  complicated operation and a high cost to achieve.

  In addition, the abrupt release position can only be obtained by breaking a window retaining a

percussion of the rod.

  It is therefore necessary to replace the glass in order to use

later the winch.

  The invention relates to a winch which overcomes the drawbacks of

the state of the art.

  The first object of the invention is a winch, intended for pulling a cable or the like of a mechanical assembly such as an opening. The winch comprises a housing and a cable tension winding drum, mounted rotatably relative to the housing. A first drum drive shaft is rotatably mounted relative to the housing around a first

rotation axis.

  A second control shaft of the first shaft, intended to be driven in rotation by a crank or the like is

also planned.

  First and second complementary gear parts, capable of transmitting the rotation between one and the other of the first and second shaft are provided on

  the first and second trees respectively.

  The second shaft is mounted rotating relative to the housing around a second fixed axis of rotation relative to the

  housing and is movable along this axis.

  While the first shaft is immobilized in translation

  along its first axis of rotation.

  The first and second shafts are such that the drum urges, by reaction to the tension of the cable, the second shaft to move in a direction determined according to the

second axis of rotation.

  The winch comprises a locking lining capable of being immobilized relative to the housing and a locking cheek fixed to the second shaft and capable of being pressed against the lining.

  The blocking trim and the blocking cheek face each other.

  opposite the second axis of rotation and are respectively turned against the determined direction and in the

determined meaning.

  The winch comprises means for moving the locking cheek away from the locking lining. The first and second axes of rotation are not parallel to each other and for example orthogonal, the first and second gears being of the wheel type

tangent and worm.

  The blocking pad has a plate whose surface facing the blocking cheek has a coefficient of friction of a sufficient value to prevent rotation about the second axis of the blocking cheek relative to the blocking pad, when the second

  the tree is requested to move in the determined direction.

  The blocking plate is in "Ferodo" (registered trademark), the blocking cheek having a surface

  made of metal, for example steel, facing this plate.

  The blocking plate has a hole for

the passage of the second tree.

  In one embodiment, the blocking plate has an abutment edge, for example rectilinear, against a complementary edge for example rectilinear, such as that of an angle iron and preventing rotation of the

  locking pad around the second axis.

  In another embodiment, the plate of the blocking lining is in the form of a washer, having a surface facing, in the determined direction, towards the housing and suitable for

to be pressed against him.

  This surface has a coefficient of friction of a value sufficient to prevent the rotation, around the second axis, of the locking lining, relative to the housing, when the second shaft is biased in displacement in

the determined meaning.

  The removal means comprise a third shaft intended to be driven in rotation by a crank or the like, mounted to rotate relative to the housing around a third axis of rotation transverse to the second axis of rotation and comprising a cam adapted to be applied to the extreme part of the second tree, which is downstream

according to the determined direction.

  The cam has a screw head fixed transversely to the

  third axis on the periphery of the third tree.

  The cam has a ball mounted to rotate in a recess formed, for example in the drill, in the surface

lateral view of the third tree.

  It comprises at least one crank or the like, removable and capable of driving in rotation about their respective axis, the second and / or the third shaft, which each comprise a connecting member in rotation to the crank, the crank comprising a member of link of complementary shape to these, the link member of the crank or the link members of the second and third shafts being for example with hollow sides, such as at

hexagon socket.

  The connecting member of the second tree is on the side

upstream according to the determined direction.

  The removable crank is unique and has the double function of driving in rotation around their respective axis the

second and third trees.

  The drum comprises a metal sheet rolled into a cylinder, for example circular and set between two flanges and is

attached to the first tree.

  The first gear part comprises a toothed wheel or an endless screw, which is fixed to the first shaft and whose transverse surface is fixed, for example by one or more screws, to the adjacent flange, the second gear part comprising a worm or a gear wheel, including a surface transverse to the second axis of rotation

  and turned in the determined direction forms the blocking cheek.

  The winch comprises a first U-shaped cradle, between the branches of which the first shaft is mounted and a second U-shaped cradle, fixed by its branches to those of the first cradle and intended for fixing the winch to a support such

than wall or wall.

  A second object of the invention is a safety device, comprising a mechanical assembly, such as opening, with two first and second positions, such as opening and closing, automatic means for passing the mechanical assembly from the second at the first position, a traction cable, for example sheathed, intended to pass the mechanical assembly from the second to the first position, to hold it there and to release it

  and the cable pull and release winch.

  A third object of the invention is an installation, such as a room or building, comprising the system and / or the winch. The invention will be clearly understood on reading the

description which follows.

  Figure 1 is a schematic side view of the winch.

  Figure 2 is a schematic view of the rear of the winch.

  FIG. 3 is a schematic top view of the winch,

  showing a transverse pin in its lower part.

  Figure 4 is a schematic top view of the part

lower rear of the winch.

  The description of the figures is made with reference to a

  longitudinal direction L, with respect to which the adjectives "front" and "rear" are taken, a transverse direction T, with respect to which are taken the adjectives "right" and "left", and an elevation direction E, orthonormal to the previous two and by

  relation to which the adjectives "high" and "low" are taken.

  The winch 1 is intended for pulling a cable, not shown, as well as for maintaining it in a taut position. The cable is intended to actuate a mechanical assembly, not shown, for example the opening and closing of a

  fire shutter or panel, not shown.

  Of course, the invention applies to any set

mechanical controlled by cable.

  The winch 1 is intended to be fixed to a wall or a wall,

for example vertical.

  The winch 1 comprises a box or frame 2 of generally parallelepipedal shape and for example of sheet metal

cut and folded.

  The housing 2 has a front face 3, a rear face 4, a straight transverse face 5, a transverse face

left 6.

  Its front 3, right 5 and left 6 faces form a first U-shaped cradle made of cut and folded metal sheet, the core of which is formed by the front face 3 and the

  branches by the transverse faces 5 and 6.

  Its rear face 4, of smaller height and width than the front face 3, faces the latter and is fixed to one of the right transverse faces 5 and left 6, in the

  realization shown, on the left side 6.

  The winch comprises, mounted rotating between the right and left transverse faces 5, 6 and housed in holes thereof, a first shaft 7 for driving a

  cable winding drum 8.

  The first shaft 7 has a transverse axis of rotation 9. In other embodiments, not shown, the drum 8 is mounted on a separate shaft from the first shaft 7 and

meshing with him.

  In the embodiment shown, the drum 8 is fixed to the first shaft 7 and has the first axis 9 as its axis of rotation.

of rotation.

  The first shaft 7 is immobilized in following translation

its first axis 9.

  The winch 1 comprises a second shaft 10 for controlling the first shaft 7 and intended to be driven in rotation

by a crank or the like.

  The second shaft 10 is mounted to rotate relative to the

  housing 2 around a second axis of rotation 11.

  The second axis 11 is not parallel to the first axis 9.

  In the embodiment shown, the second axis 11 is orthogonal to the first axis 9 and is for example longitudinal. The front and rear faces 3, 4 have passage holes respectively 12, 13 for the second shaft 10,

  for example reinforced with bronze rings.

  The second shaft 10 is movable in translation along the

second axis 11 of rotation.

  First and second gear parts 14, 15 are fixed respectively on the first and second shafts 7,, between the front and rear faces 3, 4 and

5, 6.

  The first and second gear parts 14, 15 are of

  type with tangent gear and worm.

  In the embodiment shown, the first gear part 14 comprises a toothed wheel, while the

  second gear part 15 comprises an endless screw.

  In another embodiment, not shown, the first gear part 14 comprises an endless screw and the

  second part of the gear 15 comprises a toothed wheel.

  The first and second gear parts 14, 15 are complementary and able to transmit the rotation between

  both of the first and second trees 7, 10.

  The first and second gear parts are such that under the traction of the cable, the second shaft 10 is biased in translation along the axis of rotation 11, in

a specific meaning 16.

  In the embodiment shown, this determined direction 16 is

  directed longitudinally from front to rear.

  In other realizations, not shown, this meaning

  determined 16 is directed from rear to front.

  A locking cheek 17 is fixed on the second shaft 10 and oriented along the second axis 11 in the direction

determined 16.

  A blocking pad 18 is provided between the cheek of

lock 17 and rear panel 4.

  In one embodiment, not shown, the cheek 17 extends over the entire periphery of the second axis 11 and the lining 18 extends over part of the periphery of the second axis

11.

  In another embodiment, not shown, the cheek 17 extends over part of the periphery of the second axis 11 and the lining 18 extends over the entire periphery of the

second axis 11.

  In the embodiment shown, the cheek 17 and the trim

  18 extend over the entire periphery of the second axis 11.

  The lining 18 has a through hole for the second

tree 10.

  The lining 18 is turned towards the cheek 17 against the

defined meaning 16.

  In the embodiment shown, the lining 18 comprises a plate having, in its thickness taken along the second axis 11, an edge 19 of abutment against an edge 20 of complementary shape fixed to the housing 2 and preventing the

  rotation of the lining 18 around the second axis 11.

  The abutment edge 19 of the plate is for example rectilinear and for example one of those of the plate for example rectangular. The rear face 4 is folded in the upper part, for example perpendicularly from the determined direction 16, towards the lining 18 in an angle, and carries the edge

complementary 20.

  The cheek 17 is capable of being pressed against the lining 18

in the specified direction 16.

  In another embodiment, the plate of the blocking lining 18 is in the form of a washer, the surface 21 of which, in the determined direction 16, toward the rear face 4 is free and capable of being pressed against it and the

  peripheral edge is free and remote from housing 2.

  This surface 21 has a coefficient of friction of a value sufficient to prevent rotation, around the second axis 11, of the lining 18, relative to the housing 2, when the cheek 17 is pressed against the lining 18

  due to cable tension.

  This embodiment has the advantage of avoiding any deterioration by rotation stop, for example a

  break, of the packing 18 of blocking.

  The lining 18 has a surface 22, facing the cheek 17, against the determined direction 16, and having a coefficient of friction of a value sufficient to prevent rotation around the second axis il of the cheek 17 of blocking by relative to the blocking lining 18, when the cheek 17 is pressed against the lining 18 under

the effect of cable tension.

  The lining 18 comprises for example a "Ferodo" plate

(trademark).

  The surface 23 of the cheek 17, turned in the determined direction 16 towards the surface 22 of the lining 18 is for example made of metal. The lining 18 is able to prevent the cheek 17 from rotating around the second axis 11, when the cheek 17 is pressed

  against the lining 18 in the determined direction 16.

  In another embodiment, the lining 18 is fixed, by

  example glued against the back side 4.

  The second shaft 10 includes a connecting member 24 to a crank 25, on its front end extending beyond

  the longitudinal direction L of the front face 3.

  In the embodiment shown, the blocking cheek 17 is formed by a surface of the second part 15

  gear, located downstream in the determined direction 16.

The surfaces 22, 23 are flat.

  The winch 1 includes means 26 for moving the locking cheek 17 away from the locking lining 18 against the

defined meaning 16.

  The removal means 26 comprise a third shaft 27 mounted to rotate relative to the housing around a

third axis 28 of rotation.

  The third axis 28 is transverse to the second axis 11.

  In the embodiment shown, the third axis 28 is transverse. The third shaft 27 is intended to be driven in

  rotation by a crank or the like.

  A cam 29 is provided on the third shaft 27.

  The cam 29 is suitable for being applied to the rear extreme part 30 of the second shaft 10, downstream in the direction

determined 16.

  The cam 29 is able to move the second shaft 10 against rotation in the determined direction 16 by rotation around the third axis 28 to allow the drum 8 to be unwound under

cable traction.

  In the embodiment shown, the cam 29 comprises a screw head fixed transversely through the third axis 28 on the periphery of the third shaft 27. In another embodiment, not shown, the cam 29 comprises a ball, mounted for rotation in a housing formed, for example in the drill, in the lateral surface of the

third tree 27.

  The third shaft 27 is mounted to rotate in one of the right and left transverse faces 5, 6, for example in the left transverse face 6 and in another face

  transverse 32 provided between the faces 5, 6.

  In another embodiment, not shown, the third shaft 27 is intended to be driven in rotation by a crank or the like by means of a lever arm or the like, in order to increase the effort

necessary for training.

  The crank 25 is removable and comprises a connecting member 33 in rotation. The connecting member 33 of the crank is of complementary shape to the connecting member 24 and the connecting member 31 which are of the same type. The connecting member 33 of the crank or the connecting members 24, 31 of the second and third shafts 10, 27 is

  for example with hexagon socket, for example with hexagon socket.

  In the embodiment shown, the drum 8 comprises a metal sheet 34 rolled into a circular cylinder with an axis of the first axis 9 and crimped between two flanges 35, 36

transverse to the first axis 9.

  The one 36 of the flanges adjacent to the first gear part 14 is fixed to it by means of a screw 37.

  This embodiment of the drum 8 is simple and economical.

  The housing 2 comprises a transverse reinforcing pin 38 in the lower rear part passing through the transverse faces 5, 6 and 32 and located above the third

tree 27.

  The housing also comprises, in the embodiment shown in FIG. 2, another transverse reinforcement pin 39 crossing the faces 5, 6 and 32 and located under the

third tree 27.

  The transverse faces 5, 6 of the housing 2 are fixed by means of rivets 40 to the opposite transverse branches 41, 42 of a U-shaped fixing cradle 43. The fixing cradle 43 comprises, in its rear core 44, 45 holes for the passage of bolts

  fixing the winch to a wall, wall or the like.

  The cradle 43 is produced for example by cutting and

folding of a metal sheet.

  An upper plate 46 is fixed on the cradle 43 and

  has a hole 47 for passage of the cable.

  The winch 1 operates as follows: To wind the cable around the drum 8, the connecting member 33 of the crank 25 is connected to the connecting member 24 of the second shaft 10 and the crank 25 is rotated around the second axis 11 to rotate through the gear parts 14, 15 the

first shaft 7 and the drum 8.

  The tensioning of the cable causes the translation of the cheek 17 against the lining 18, sufficient to immobilize them relative to one another and relative to the housing 2, which blocks in rotation the second shaft 10 and therefore the drum 7 through the parts

  gear 14, 15 and the first shaft 7.

  To cause the unwinding of the drum 8, the crank 25 is connected via its connecting member 33 to the connecting member 31 and it is rotated to apply the cam 29 against the end portion 30 of the

second tree 10.

  This causes the translation of the second shaft 10 against the determined direction 16 and moves the cheek 17 away from the lining 18, which allows the rotation of the second shaft as well as that of the drum 8 via the

  gear parts 14, 15 and the first shaft 7.

Claims (17)

  1. Winch (1), intended for pulling a cable or the like of a mechanical assembly such as opening, comprising: - a housing (2); - a drum (8) for winding the cable under tension, mounted to rotate relative to the housing (2); - A first shaft (7) for driving the drum (8) in rotation, the first shaft (7) being rotatably mounted relative to the housing (2) about a first axis of rotation (9); - a second control shaft (10), intended to be driven in rotation by a crank (25) or the like; and - first and second gear parts (14, 15), complementary, provided on the first and second shafts (7, 10);   characterized in that the first shaft (7) is immobilized in translation along its first axis of rotation; the second shaft (10) is mounted to rotate relative to the housing (2) around a second axis of rotation (11) and is movable thereon; the first and second gear parts (14, 15) are capable of transmitting the rotation between one and the other of the first and second shafts (7, 10); the first and second shaft (7, 10) are such that the drum (8) biases, by reaction to the tension of the cable, the second shaft (10) moving in a determined direction (16) along the second axis of rotation ( 11); the winch (1) comprises, facing the second axis of rotation (11) and respectively turned against the determined direction (16) and in the latter: - a suitable blocking (18) to be immobilized relative to the housing (2); and - a locking cheek (17) fixed to the second shaft (10) and able to be pressed against the locking lining (18); the winch (1) comprising means (26) for moving the   locking cheek (17) of the locking lining (18).   2. Winch (1) according to claim 1, characterized in that the first and second axes of rotation (9, 11) are not parallel to each other and for example orthogonal, the first and second gears (14, 15) being of type at tangent wheel and worm.   3. Winch (1) according to any one of claims 1   and 2, characterized in that the locking lining (18) comprises a plate whose surface (22) facing the locking cheek (17) has a coefficient of friction of a value sufficient to prevent rotation about the second axis (11) of the cheek (17) locking relative to the lining (18) blocking, when the second shaft (10) is biased in displacement in the determined direction (16). 4. Winch (1) according to claim 3, characterized in that the plate of the blocking lining (18) is in "Ferodo" (registered trademark), the blocking cheek (17) comprising a metal surface (23) , for example steel, facing this plate.   5. Winch (1) according to any one of claims 3   and 4, characterized in that the plate of the blocking lining (18) has a hole for the passage of the second tree (10).   6. Winch (1) according to claim 5, characterized in that the blocking plate (18) has an abutment edge (19), for example straight, against a complementary edge (20) for example straight, such than that of an angle iron and preventing the rotation of the trim of   blocking (18) around the second axis (11).   7. Winch (1) according to any one of claims 3 to   , characterized in that the plate of the blocking lining (18) is in the form of a washer, comprising a surface (21) facing, in the determined direction (16), towards the housing (2) and able to be pressed against it , this surface (21) having a coefficient of friction of a value sufficient to prevent rotation, about the second axis (11), of the locking granulation (18), relative to the housing (2), when the second shaft (10) is   requested to move in the determined direction (16).   8. Winch (1) according to any one of claims 1 to   7, characterized in that the removal means (26) comprise a third shaft (27) intended to be driven in rotation by a crank (25) or the like, mounted to rotate relative to the housing around a third axis of rotation (28) transverse to the second axis of rotation (11) and comprising a cam (29) capable of being applied to the end part (30) of the second shaft (10), which is located   downstream in the determined direction (16).   9. Winch (1) according to claim 8, characterized in that the cam (29) comprises a screw head fixed transversely to the third axis (28) on the periphery of the third tree (27).   10. Winch (1) according to claim 8, characterized in that the cam (29) comprises a ball rotatably mounted in a housing formed, for example in the drill, in the surface side of the third tree (27).   11. Winch (1) according to any one of claims 1   to 10, characterized in that it comprises at least one crank (25) or the like, removable and capable of driving in rotation about their respective axis (11, 28), the second and / or the third shaft (10, 27 ), which each comprise a connecting member (24, 31) rotating in the crank (25), the crank (25) comprising a connecting member (33) of complementary shape thereof, the connecting member ( 33) of the crank (25) or the connecting members (24, 31) of the second and third shafts (10, 27)   being for example with hexagon socket, such as with hexagon socket.   12. Winch (1) according to claim 11, characterized in that the connecting member (24) of the second shaft (10) is located on the upstream side in the determined direction (16), the winch (1) comprises a single removable crank (25) for rotating the second and third shafts (10, 27).   13. Winch (1) according to any one of claims 1   12, characterized in that the drum (8) comprises a metal sheet (24) rolled into a cylinder, for example circular and crimped between two flanges (35, 36) and is attached to the first shaft (7).   14. Winch (1) according to any one of claims 1   to 13, characterized in that the first gear part (14) comprises a toothed wheel or an endless screw, which is fixed to the first shaft (7) and whose transverse surface is fixed, for example by one or more screws , at the adjacent flange (36), the second gear part (15) comprising an endless screw or a toothed wheel, whose surface transverse to the second axis of rotation (11) and turned in the determined direction (16) forms the play of blocking (17).   15. Winch (1) according to any one of claims 1   to 14, characterized in that it comprises a first U-shaped cradle, between the branches (5, 6) from which the first shaft (7) is mounted and a second U-shaped cradle, fixed by its branches (41, 42) to those (5, 6) of the first cradle and intended for fixing the winch to a support such as wall or wall. 16. Safety device, comprising a mechanical assembly, such as opening, with two first and second positions, such as opening and closing, automatic means for moving the mechanical assembly from the second to the first position, a traction cable, for example sheathed, intended to pass the mechanical assembly from the second to the first position, to hold it there and to release it, a traction and cable release winch, characterized by a winch according to   any one of claims 1 to 15.   17. Installation such as a room or building, comprising a system according to claim 16 and / or a winch according to   any one of claims 1 to 15.