FR2846108A1 - Jack assembly for raising lid of building ventilation outlet, comprises support with lateral jack pivot, jack rod with tip to engage lid block and bolted plate on jack rod to align tip when retracted - Google Patents

Abstract

The electric jack (28) has a body (40) which is pivoted (AA) within a support (26) and an operating rod (38) with a tip (46) which engages with a block on a ventilation lid to lift it to a ventilation position. In case of fire another pneumatic jack releases the tip and fully opens the lid. When the electric jack is retracted it is aligned to resume accurate engagement with lid block by a bolted plate (50) on the jack rod An Independent claim is also included for : A ventilation and evacuation outlet for a building which includes a self aligning electric jack to raise the lid to a ventilation position and a pneumatic jack able to disengage the electric jack and to raise the lid fully in case of fire.

Description

The present invention relates to a cylinder assembly, in particular for

  smoke vent, of the type comprising a jack support and a jack which defines a first central axis and which comprises a jack rod and a jack body, the jack rod being movable between a position

  retracted and an extended position along said first axis, the actuator rod comprising a connecting member adapted to connect the actuator rod to an element to be driven, the actuator being articulated on the actuator support around a second axis not parallel to said first axis.

  It applies in particular to smoke exhaust from buildings. The smoke vents generally comprise a fixed base element, generally a frame or curb, to which a leaf is hinged. The frame is intended to be installed on the opening of a smoke evacuation pipe. The leaf, which may for example be a dome, a hood or a frame filled with plastic material, is movable between a position for closing the opening and a position for discharging smoke by means of a

first training device.

  This device is suitable for bringing the leaf

  quickly in its smoke evacuation position in case of fire.

  These outlets sometimes also include a

  second drive device, which is adapted to bring the leaf into an aeration position and to maintain it therein. This position is located between the two aforementioned positions for closing and discharging smoke.

  The second drive device generally includes a

cylinder articulated to the frame.

  In order to allow the first drive device to fully open the leaf, the cylinder of the second drive device is connected to the leaf by means of a releasable connecting device. When the first drive device trips

  leaf is released from the second drive device.

  Usually smoke vents are

  installed on the roof of the building. Due to the inclination of the roof, the cylinder tilts into an undefined position after its release from the connection device.

  When the leaf is closed again, locking of the leaf to the connection device is therefore not ensured.

  The object of the present invention is to provide a

  device which allows a safe reclosing of the leaf after a triggering of the first drive device.

  To this end the invention relates to an assembly of the aforementioned type, characterized in that the assembly comprises in

  in addition to autonomous guidance and holding means adapted to bring the connecting member into a determined position relative to the jack support during movements of the jack rod in a determined direction, and to hold it in this position.

  According to embodiments, the invention may include one or more of the following characteristics: - the autonomous guide and holding means 25 are adapted to bring the connecting member into said determined position when the jack rod is moved from its extended position to its retracted position; - The independent guide and holding means comprise a first guide and holding element 30 disposed on the cylinder rod, and a second guide and holding element fixed on the jack support, and said two elements are adapted to cooperate during said movements of the cylinder rod; said first guide and holding element comprises a plate, in particular flat, which is adapted to be applied against a surface of said second guide and holding element, in particular flat; - Said first guiding and holding element comprises a first cam-forming member and said second guiding and holding element comprises a second cam-forming member; and - said first cam member is a member 10 having cam surfaces flaring towards the end of the jack rod turned opposite the jack body,

including a truncated cone.

  The invention further relates to a smoke outlet comprising: - a frame delimiting an inlet opening and an outlet opening, the inlet opening being intended to be connected to an outlet opening of a discharge pipe smoke and ventilation; a leaf which is articulated to the frame between a closed position, an intermediate ventilation position and a smoke evacuation position, and which is adapted to close said outlet opening from the frame; - a connecting device arranged on the leaf and comprising a first connecting member; - a first drive device adapted to bring the leaf into its smoke evacuation position; a second driving device comprising a second connecting member and adapted to move the leaf between its ventilation and shutter positions, said second driving device being releasably connected to the leaf by means of the connecting device by means of said first connecting member, characterized in that said second drive device comprises a jack assembly as described above, and characterized in that the leaf is linked to said second drive device by cooperation of said two connecting members, and said determined position of the connecting member of the actuator assembly is such that it is on the path of said second connecting member when the leaf is brought from its evacuation position of

  smoke towards its closed position.

  According to embodiments of this smoke outlet: - the movement of the leaf from its smoke evacuation position to its closed position causes mutual locking of said connecting members; and - the start of actuation of the first device

  drive causes the release of the mutual link 15 of said two connecting members.

  The invention will be better understood on reading the

  description which follows, given solely by way of example and made with reference to the appended drawings, on

  which: - Figure 1 is a sectional side view of a smoke outlet according to the invention, in the closed state; - Figure 2 is a side view in section of the smoke outlet of Figure 1, in the aeration state; - Figure 3 is a side view of the smoke outlet of Figure 1, in the smoke evacuation state; - Figures 4 and 5 are perspective views of a cylinder assembly of the smoke outlet according to the invention, in different configurations; - Figure 6A is an enlarged view of the detail VIA of Figure 1; - Figure 6B is a section along the line VIBVIB of Figure 6A; - Figure 6C is a view along the arrow VIC in Figure 6B; and - Figure 7 is a sectional view of part

  of a variant of the jack assembly of Figures 4 and 5.

  In Figure 1 is shown a smoke outlet

  according to the invention, designated by the general reference 2.

  The smoke outlet 2 includes a frame 4, in the form

  general parallelepiped, having a lower inlet opening 6 and an upper outlet opening 8. The frame 4 is fixed with the inlet opening 6 on the outlet opening 10 of a smoke evacuation pipe 12 and 10 ventilation of a building.

  The smoke outlet 2 further comprises a leaf 14, articulated to the frame 4 about a horizontal axis X-X. The leaf 14 is movable between a position for closing the outlet opening 8 of the frame (Figure 1) and a position 15 for discharging smoke, in which the leaf 14 is

  tilted at least 900 from its closed position (Figure 3). In addition, the leaf 14 can take a ventilation position (Figure 2) in which it is tilted by less than 900 relative to its closed position.

  The smoke outlet 2 includes a first device

  drive 16, adapted to bring the leaf 14 to its smoke evacuation position, as well as a second drive device 18, adapted to move the leaf 14 between its shutter and ventilation positions.

  The first 16 and second 18 drive devices are connected to the leaf 14 by means of a

liaison 20.

  The first drive device 16 is constituted by a pneumatic cylinder 22. This cylinder 22 is articulated to the frame 4 around an axis Y-Y. The jack 22 comprises a jack head 22A which is articulated to the connection device 20 about an axis Z-Z. The Y-Y and Z-Z axes extend parallel to the X-X axis. The pneumatic cylinder 22 is controlled for example by a

  smoke (not shown) placed inside the building.

  The second drive device 18 is a jack assembly 24 comprising a jack support 26, fixed to the frame 4, and an electric jack 28. As illustrated in FIG. 4, the jack support 26 consists of a bracket 30 U-shaped, open

down in the mounted state.

  The bracket 30 comprises two side walls 32, 10 parallel and connected to each other by a central wall 34, extending perpendicular to the two side walls 32. Each of the two side walls 32 ends in a

  flange 36 for fixing the support 26 to the frame 4.

  The electric cylinder 28 consists of a cylinder rod 38 and a cylinder 40. The cylinder 40 is articulated, at its end situated on the side of the cylinder rod 38, with the two side walls 32 around an axis AA. The electric actuator 28 defines an actuator axis B-B, perpendicular to

axis A-A.

  The actuator rod 38 consists of a smooth section 42, disposed near the cylinder 40 and having a cross section of diameter d, of a threaded section 44 and of a fixing end piece 46. The fixing end piece 46 is arranged at the end of the jack rod 38 opposite the cylinder 40. The fixing end piece 46 has a domed shape and

  defines a snap groove 47.

  The actuator rod 38 can be moved along the axis B-B between an extended position (Figures 2 and 4), which corresponds to the ventilation position of the leaf 14, and a retracted position, which corresponds to the position

  shutter leaf 14 (Figures 1 and 5).

  The cylinder assembly 24 further comprises autonomous means 48 for guiding and holding the cylinder 28 by

relative to the cylinder support 26.

  These means 48 comprise a first element 50 for guiding and holding fixed on the jack rod 38, as well as a second element 52 for guiding and holding arranged on the jack support. In this case, the first guide and holding element 50 is constituted by a circular plate 54 perpendicular to the axis B-B. The plate 54 is fixed to the cylinder rod 38 by two nuts 56, 58 screwed onto the threaded section 44 of the cylinder rod 38 on either side of the plate 54. The second element 52 for guiding and holding 10 consists of the central wall 34 of the

cylinder support 26.

  The means 48 further comprise surfaces of

  stop adapted to maintain the electric actuator 28 within an angular range determined relative to the support 26.

  The abutment surfaces are formed, on the one hand, by the edge of a recess 60 formed in the central wall 34 and, on the other hand, by the surface of the smooth section 42 of

the cylinder rod 38.

  In this case, the recess 60 is a circular opening. The diameter Do of this opening is significantly greater than the diameter d of the smooth section 42 of the rod

cylinder 38.

  The connecting device 20 is fixed to the leaf 25 14 on the side opposite to the axis of articulation X-X (Figure 1).

  As shown in FIG. 6A, this connection device 20 comprises a base body 64 having a recess 66 for receiving the fixing end piece 46, as well as a locking finger 68 forming a member for locking the end piece 46 The locking finger 68 is integral with a piston 68A housed in a bore 68B formed in the base body 64. The locking finger 68 is adapted to be moved in translation in a direction V between a fixing position (shown on Figures), in which it is engaged in the groove 47, and a release position (not shown) of the nozzle 46. The piston 68A is subjected to the action of a spring 68C, which biases the piston towards its locking position. The connecting device 20 further comprises means 70 adapted to move the locking finger 68 from its fixing position to its release position under the action of the

  pneumatic cylinder 22 (see Figure 6B).

  The means 70 comprise a first rod 72 10 hinged to the jack 22 around the axis Z-Z.

  This first rod 72 is housed in two oblong holes 74 formed in the base body 64 and extending in the direction V. The first rod 72 passes through the head

22A of cylinder 22.

  The means 70 further comprise a second rod 76 which passes through two oblong holes 78 formed in the body

  base and extending parallel to the holes 74.

  The second rod 76 is fixed on the piston 68A. The two rods 72 and 76 are coupled to each other by two rods 78, 80 which are arranged on either side of the

basic body 64.

  Two elastic rubber blocks 81 are arranged

  between the base body 64 and the first rod 72 and urge the first rod towards its position corresponding to the locking position of the finger 68.

  The smoke outlet according to the invention operates from

the following way.

  Initially the smoke outlet 2 is in the configuration shown in FIG. 1. The leaf 14 is in its closed position and the fixing end piece 46 of the jack rod 38 is locked in the recess 66 of the connecting device 20. The circular plate 54 applies

on the central wall 34.

  When it is necessary to ventilate the building, the electric actuator 28 is actuated and brings the leaf 14 into its ventilation position, shown in FIG. 2. In this position, the actuator rod 38 is always fixed to the device connecting 20 by the locking finger 68 which engages in the groove 47, preventing a total and untimely opening of the leaf 14, for example under the force of a

gust of wind.

  The leaf 14 is closed from its ventilation position 10 by retraction of the actuator rod 38. In the event of a fire, the pneumatic actuator 22 is actuated. This actuation leads first of all to a displacement of the assembly of the first rod 72, rods 78, 15 80, second rod 76 and piston relative to the base body.

  64 and consequently to a displacement of the locking finger 68 in its release position, so that the latter releases the fixing end piece 46. Then the leaf 14 is pushed suddenly towards its position 20 for evacuating smoke (Figure 3).

  In the case where, when the pneumatic cylinder 22 is triggered, the electric cylinder 28 is not in its retracted position, the electric cylinder 28 rocks around the axis AA so that the smooth section 42 of the rod 25 of cylinder is applied to the edge of the recess 60. In

  Consequently, the fixing end piece 46 is not located in the path of the recess 66 of the connecting device 20 when the leaf 14 is closed, and the leaf 14 cannot be closed and locked on the end piece. fixing 46 30 by simple tilting in its closed position.

  Then, the cylinder rod 38 is brought into its retracted position. During the retraction, firstly the edge of the circular plate 54 is applied to the central wall 34. When the retraction of the cylinder rod 38 continues, the plate 54 and the central wall 34 tilt the actuator 28 in a determined position, in which it is when the leaf 14 is in its closed position. In this position, the plate 54 and the central wall 34 are applied flat one on the other (FIG. 5), and the fixing end piece 46 is on the path of the recess 66 during closing. of

leaf 14.

  When the leaf 14 is brought back to its closed position 10, the recess 66 of the connecting device 20

  comes to rest on the fixing end piece 46. The connecting device 20 locks the leaf 14 on the actuator rod 38 by snap-fastening of the finger 68 in the groove 47 under the force of the spring 68C. As a result, the leaf 14 15 is kept in its closed position again.

  In Figure 7 is shown part of a

  variant of the cylinder assembly according to the invention.

  Only differences from the whole

  cylinder described above will be described. Similar elements have the same references.

  The first guide and holding element 50

  further includes a cam member. This cam member is a truncated cone 90 fixed to the circular plate 54 on the side opposite to the fixing end piece 46. The cone trunk 90 widens towards the fixing end piece 46.

  The truncated cone 90 has a base diameter D, and a

  tip diameter d. The base diameter D is less than the diameter Do of the opening 60. The tip diameter d is identical to the diameter d of the smooth section 42 of the cylinder rod 38.

  When the cylinder rod 38 is retracted, after the release of the fixing end piece 46, firstly the truncated cone 90 comes to rest against the edge of the opening 60 and brings the cylinder rod 38 close to its determined angular position, until the edge of the plate 54 is applied to the central wall 34. Then the actuator rod 38 is guided by applying the edge of the plate 54 to the central wall 34 until that the plate 54 is applied flat on the central wall 34. Thanks to the cam member 90, the forces applied to the plate 54 during the retraction of the rod

cylinder 38 are weak.

  The cylinder assembly according to the invention leads to significant safety of the smoke outlet.

  In addition, it is easy to manufacture and can be installed on existing smoke vents with few modifications.

Claims (9)

RESELL I CAT IONS   1. Cylinder assembly, in particular for smoke outlet (2), of the type comprising - a cylinder support (26) and - a cylinder (28) which defines a first central axis (BB) and which comprises a cylinder rod ( 38) and a jack body (40), the jack rod (38) being movable between a retracted position and an extended position along said first axis, - the jack rod (38) comprising a suitable connecting member (46) for connecting the jack rod to an element to be driven (14), the jack (28) being articulated on the jack support (26) about a second axis (AA) not parallel to said first axis, characterized in that the set also includes   autonomous guide and holding means (48) adapted to bring the connecting member (46) into a determined position relative to the jack support (26) during movements of the jack rod in a given direction, and to keep it in this position.   2. Assembly according to claim 1, characterized in   that the independent means (48) for guiding and holding are adapted to bring the connecting member (46) into said determined position when the jack rod (38) is moved from its extended position to its retracted position.   3. Assembly according to claim 1 or 2, characterized in that the autonomous guide and holding means (48) comprise a first guide and holding element (50) arranged on the jack rod (38), and a second element (52) for guiding and holding fixed on the jack support (26), and in that said two elements (50, 52) are adapted to cooperate during said   displacements of the cylinder rod (38).   4. An assembly according to claim 3, characterized in that said first element (50) for guiding and holding comprises a plate (54), in particular flat, which is adapted to be applied against a surface of said second element (52) of guiding and holding, especially flat. 5. An assembly according to claim 3 or 4,   characterized in that said first guide and holding member (50) comprises a first cam member (70) and said second guide and holding member comprises a second cam member (60).   6. An assembly according to claim 5, characterized in   that said first cam member (90) is a member having cam surfaces flaring towards the end of the jack rod (38) turned away from the jack body 15 (40), in particular a trunk cone.   7. Smoke outlet comprising - a frame (4) delimiting an inlet opening (6) and an outlet opening (8), the inlet opening (6) being intended to be connected to an outlet opening ( 10) 20 of a pipe (12) for smoke evacuation and ventilation; - a leaf (14) which is articulated to the frame (4) between a closed position, an intermediate ventilation position and a smoke evacuation position, and which is adapted to close said outlet opening (8) of the box 25 (4); - a connecting device (20) disposed on the leaf (14) and comprising a first connecting member (68); - a first drive device (16) adapted 30 for bringing the leaf (14) to its smoke evacuation position; - a second drive device (18) comprising a second connecting member (46) and adapted to move the leaf (14) between its ventilation and shutter positions, said second drive device (18) being connected to the leaf (14) releasably by means of the connecting device (20) via said first connecting member (68), characterized in that said second device   drive (16) comprises a cylinder assembly according to any one of the preceding claims, in that the leaf (14) is connected to said second drive device (16) by cooperation of said two connecting members (46, 68), and in that said determined position of   the connecting member (46) of the actuator assembly is such that it is on the path of said second connecting member (68) when the leaf (14) is brought from its smoke evacuation position towards its shutter position 15.   8. smoke outlet according to claim 7,   characterized in that the movement of the leaf (14) from its smoke evacuation position to its closed position causes mutual locking of said connecting members 20 (46, 68).   9. smoke outlet according to claim 7 or 8, characterized in that the start of actuation of the first drive device causes the release of the   mutual connection of said two connecting members (46, 68).