ROLLER SHUTTER ACTUATION GROUP

Abstract

An actuation group for a roll-up closure wall comprises: - a tubular body (2) having a main development direction (D) and having first and second ends (2A, 2B); - a motor (3), configured to rotate the tubular body (2); - a support body (4) having a housing seat (40); - a parachute device (5), housed in the seat (40), and comprising a centrifugal brake (50) functionally coupled, in use, to the tubular body (2), the parachute device (5) being configured to activate and block a rotation of the tubular body (2) when a pre-established rotational speed of the tubular body (2) is exceeded; - a torsion spring (7), having a first end (7A) coupled to the motor (3) to be rotated; - a first sensor (9) configured to detect a signal relating to a state of the torsion spring (7).

Description

Title of the invention: ROLLER SHUTTER ACTUATION GROUP technical field

[0001] The present invention relates to an actuation group for a roll-up closing wall. Previous technique

[0002] The present invention relates to an actuation group for a roll-up closing wall.

[0003] In the field of systems for closing spaces or places such as, for example, garages, shops, rooms, etc., there are different types of closing walls, including roller shutters and motorized roller blinds.

[0004] The actuation group with which known curtains and roller shutters are equipped has certain disadvantages both in terms of ease of assembly and maintenance and in terms of safety.

[0005] Generally, the actuation groups include a motor that allows the rolling wall to be moved, a torsion spring and a safety device which may be, for example, of the parachute type.

[0006] The torsion spring automatically loads during the descent phase of the closing wall by absorbing the elastic energy and reducing the power required from the motor (or the user, in the case of manual operation) during the ascent phase of the wall, balancing the weight of the wall.

[0007] Generally, the parachute device is arranged outside relative to the other elements of the group and interacts with the torsion spring.

[0008] There is a need to create an actuation group that is particularly practical to mount and also suitable for small spaces.

[0009] The requirement to report any possible problem with the actuation group, such as the breakage of the spring itself, is also felt. Object of the invention

[0010] The object of the present invention is to provide an actuation group for a roll-up closing wall that meets the requirements mentioned above.

[0011] The specified technical task is essentially performed by an actuation group for a closing wall, comprising one or more of the technical features set forth in the attached claims and in the description.

[0012] The actuation group of a roll-up closing wall is remarkable in that the actuation group comprises: - a tubular body having a principal development direction and having a first and a second end; - a tubular body having a principal development direction and having a first and a second end; - a motor, configured to rotate the tubular body, - a support body with a housing seat, - a parachute device, housed in the seat of the support body and comprising a centrifugal brake, functionally coupled, in use, to the tubular body, the parachute device being configured to activate and block a rotation of the tubular body when a pre-established rotational speed of the tubular body is exceeded, - at least one torsion spring, having a first end coupled to the motor to be set in rotation; - a first sensor configured to detect a signal relating to a state of the torsion spring.

[0013] Advantageously, the first sensor is associated, in particular fixed, to the support body.

[0014] In a particular configuration, the actuation group includes a second sensor, disposed in the support body and configured to detect an actuation of the centrifugal brake.

[0015] Preferably, the actuation group comprises: - an activation body, partially rotatable relative to the support body; and in which: - the torsion spring also has a second end, opposite to the first end, functionally connected, directly or indirectly, to the activation body; - the first sensor is configured to switch following a rotation of the activation disc.

[0016] According to one embodiment, the activation body is configured to rotate, relative to the support body, by an angle of less than 45°.

[0017] According to another embodiment, the activation body comprises a housing seat, and wherein the second end is fixed to the activation body, inserted inside the housing seat.

[0018] Preferably, the activation body has the shape of a disc.

[0019] In an advantageous embodiment, the actuation group comprises a spring fixing body, to which the second end of the spring is fixed, and in which the activation body is coupled to the fixing body.

[0020] Preferably, one, between the activation body and the support body, includes limiting recesses and the other, between the support body and the activation body, includes projections configured to fit into said recesses; said limiting recesses and said projections being configured to define partial rotation constraints of the activation body with respect to the support body.

[0021] Preferably, the activation body has an activation protrusion or an activation recess, configured to bind with the first sensor when the activation body is in a predetermined angular position, relative to the support body.

[0022] Preferably, the actuation group includes another spring, functionally coupled to the activation body and the support body.

[0023] Preferably, the support body includes a seat for housing said other spring, and in which one end of said other spring is coupled to the activation body.

[0024] Preferably, the actuation group includes a second sensor, disposed in the support body, configured to detect an actuation of the centrifugal brake following an exceedance of the falling speed of the closing wall compared to a pre-established value.

[0025] Preferably, the actuation group includes a control unit, connected to the first sensor and configured to emit an alarm signal based on a state of the signal received from said first sensor.

[0026] Preferably, the actuation group includes a signaling unit, in communication with the control unit, configured to make available a signaling concerning the first sensor and / or the second sensor.

[0027] Preferably, the motor comprises a rotor connected to the tubular body.

[0028] Preferably, the support body includes a stop portion intended to come into contact with the parachute device when the centrifugal brake is actuation.

[0029] Preferably, the centrifugal brake comprises a discoidal body.

[0030] Preferably, the discoidal body has a concave portion.

[0031] Preferably, the second sensor is in contact with said concave portion when the centrifugal brake is not actuated.

[0032] Preferably, the discoidal body comprises a first portion and a second portion.

[0033] Preferably, the discoidal body includes a first edge developing around at least the first portion.

[0034] Preferably, the support body has a first stop portion configured to potentially come into contact with the first edge when the centrifugal brake is activated.

[0035] Preferably, the discoidal body comprises a second edge developing around at least the second portion.

[0036] Preferably, the support body has a second stop portion configured to come against the second edge.

[0037] Preferably, the centrifugal brake comprises a toothed wheel, housed inside the discoidal body and having a plurality of depressions and a central hole.

[0038] Preferably, the centrifugal brake comprises a plurality of movable locking elements, each movable locking element being housed at the level of each depression of the toothed wheel.

[0039] Preferably, the plurality of movable blocking elements comprises spherical or cylindrical elements.

[0040] Preferably, the parachute device is configured to rotate relative to the support body in a first direction of rotation following the actuation of the centrifugal brake.

[0041] Preferably, the tubular body has an octagonal cross-section.

[0042] Preferably, the tubular body has a cylindrical cross-section

[0043] Preferably, the first sensor is configured to generate respectively a first signal following the rupture of the torsion spring.

[0044] Preferably, the first sensor is defined by a switch.

[0045] Preferably, the second sensor (8) is defined by a switch. Brief description of the drawings

[0046] This description will be set out below with reference to the accompanying drawings, provided for illustrative purposes only and, therefore, not as a limitation, in which:

[0047] [Fig-1] illustrates an actuation group of a closing wall in a perspective view, in accordance with the present description, according to a first embodiment;

[0048] [Fig.2] 2 illustrates an exploded view of the actuation group of the [Fig.1];

[0049] [Fig.3] illustrates a cross-section of the actuation group of the [Fig.1];

[0050] [Fig.4] illustrates a detail of an actuation group for a closing wall in a perspective view, in accordance with this description, according to the first form of realization;

[0051] [Fig.5] illustrates a detail of an actuation group for a closing wall in a perspective view according to the first form of realization;

[0052] [Fig.6] are respective perspective views of the detail of [Fig.5], with a activation disc in two different positions;

[0053] [Fig.7] are respective perspective views of the detail of [Fig.5], with a activation disc in two different positions;

[0054] [Fig.8] illustrates a detail of a closing wall actuation group in a perspective view, in accordance with the present description, according to the first embodiment;

[0055] [Fig.9] illustrates a perspective view of the detail of [Fig.8], disassembled, with a component removed;

[0056] [Fig. 10] illustrates a perspective view of the detail of [Fig.8], disassembled;

[0057] [Fig. 11] respectively illustrate a partially assembled perspective view and an exploded perspective view of a parachute device of an actuation group of a closing wall in a perspective view in accordance with the present description;

[0058] [Fig. 12] respectively illustrate a partially assembled perspective view and an exploded perspective view of a parachute device of an actuation group of a closing wall in a perspective view in accordance with the present description;

[0059] [Fig. 13] illustrates an actuation group of a closing wall in a perspective view, in accordance with the present description, according to a second embodiment;

[0060] [Fig. 14] illustrates an exploded view of the actuation group of the [Fig. 13];

[0061] [Fig. 15] illustrate a detail of an actuation group for a closing wall in a perspective view, in accordance with the present description, according to the second embodiment, in two different configurations;

[0062] [Fig. 16] illustrate a detail of a closing wall actuation group in a perspective view, in accordance with the present description, according to the second embodiment, in two different configurations;

[0063] [Fig. 17] respectively illustrate an enlargement of certain details of figures 15 and 16

[0064] [Fig. 18] respectively illustrate an enlargement of certain details of figures 15 and 16. Description of the implementation methods

[0065] The object of the invention is an actuation group 1 for a rollable closing wall.

[0066] According to the invention, the actuation group of a roll-up closure panel comprises:

[0067] - a tubular body 2 having a principal development direction D and presenting a first and a second end 2A, 2B;

[0068] - a motor 3, configured to rotate the tubular body 2,

[0069] - a support body 4 having a housing seat 40,

[0070] - a parachute device 5, housed in the seat 40 of the support body 4, and comprising a centrifugal brake 50 functionally coupled (directly or indirectly) to the tubular body 2, the parachute device 5 being configured to activate and block a rotation of the tubular body 2 when a pre-established (angular) rotational speed of the tubular body 2 is exceeded,

[0071] - at least one torsion spring 7, having a first end 7A functionally coupled (preferably indirectly) to motor 3 to be set in rotation;

[0072] - a first sensor 9 (preferably a switch) configured to detect a signal relating to a state (preferably of rupture and / or discharge) of the torsion spring 7.

[0073] According to another aspect, the first sensor 9 is associated, in particular fixed, to the support body 4.

[0074] Note that, preferably, the actuation group includes a second sensor 8, disposed in the support body 4 and configured to detect an actuation of the centrifugal brake 50.

[0075] The two embodiments illustrated, first and second, share the concept; the actual differences between these embodiments will be further clarified below.

[0076] According to one aspect of this description, the actuation group comprises an activation body 20, partially rotatable relative to the support body 4.

[0077] Furthermore, preferably, the torsion spring 7 has a first end 7A functionally connected to the motor 3 (directly or indirectly), to be rotated, and a second end 7B functionally connected, directly or indirectly, to the activation body 20.

[0078] The term "indirect connection" means that one element can be connected to another by means of other elements, while the term "direct connection" means that one element can be connected to another without other elements.

[0079] Please note that, where it is not mentioned that the connection is direct or indirect, it is understood that it can be, according to alternative embodiments, in both ways.

[0080] Note that the first sensor 9 is configured to switch (i.e. change logic state) following a rotation of the activation disk 20 between a first and a second angular position.

[0081] Note that the expression "partially rotating", in reference to the activation disc 20, should be understood as the fact that the activation body 20 does not perform a total rotation, i.e. 360°, relative to the support body 4, but performs a rotation according to a pre-established angle of rotation (less than 360°).

[0082] This aspect will be clarified later.

[0083] According to another aspect, the activation body 20 is configured to rotate, relative to the support body 4, by an angle of less than 45° (preferably by an angle of less than 15°).

[0084] To allow the "partial rotation" of the activation body 20, relative to the support body 4, one, between the activation body 20 and the support body 4, includes limiting recesses 23A and the other, between the support body 4 and the activation body 20, includes projections 23B configured to fit into said recesses 23A; said limiting recesses 23A and said projections 23B are configured to define partial rotation constraints of the activation body 20 relative to the support body 4.

[0085] The use of this partial rotation, in relation to the signal from the first sensor 9, will be better described below.

[0086] According to the second embodiment, the activation body 20 comprises a housing seat 21.

[0087] The second end 7B of the spring 7 is fixed to the activation body 20, inserted inside the housing seat 21.

[0088] According to the first embodiment, the activation body 20 has the shape of a disc.

[0089] Furthermore, in this first embodiment, the actuation group includes a spring 7 fixing body 22, to which the second end 7B of the spring 7 is directly attached; in this first embodiment, the activation body 20 is coupled (i.e. fixed) to the fixing body 22.

[0090] According to another aspect, the activation body 20 has an activation protrusion 24A or an activation recess (visible in Figures 10 and 17), configured to bind with the first sensor 9 (more precisely, with the activation element of the first switch 9) when the activation body 20 is in a predetermined angular position, relative to the support body 4.

[0091] In practice, the arrangement of the activation body 20 in a predetermined angular position determines the switching of the state of the first sensor 9 (i.e., of the switch 9).

[0092] This functionality will be explained in more detail below, with reference to the specific advantages of the innovation.

[0093] According to one aspect, the actuation group includes another spring 25, functionally coupled to the activation body 20 and the support body 4.

[0094] This other spring 25 is active (interposed) between the activation body 20 and the support body 4. The functionality of this other spring 25 will be described in more detail below.

[0095] According to another aspect, the support body 4 includes a seat 26 for housing said other spring 25, and one end of said other spring 25 is coupled to the activation body 20.

[0096] Preferably, said spring 25 is a linear spring.

[0097] The spring 25 is compressed between the first angular position of the activation body 20 (position corresponding to the unloaded or broken spring 7) and the second angular position of the activation body 20 (position corresponding to the loaded spring 7).

[0098] According to another aspect, the actuation group includes a second sensor 8 (preferably a switch), disposed in the support body 4, configured to detect an actuation of the centrifugal brake 50 following an exceedance of the angular rotation speed of the tubular body 2, corresponding to an excessive falling speed of the closing wall compared to a pre-established value.

[0099] This condition corresponds to the situation in which the spring 7 is broken because of a defect in the motor and / or the brake (or in another mechanical component inherent in the motor-closing wall kinematic chain), which therefore determines a sudden acceleration (fall) of the closing wall.

[0100] According to another aspect, the actuation group includes a control unit, connected to the first sensor 9 and / or the second sensor 8 and configured to emit an alarm signal according to a state of the signal received from said first sensor 9 and / or second sensor 8.

[0101] According to another aspect, the actuation group includes a signaling unit, in communication with the control unit, configured to make available a signaling concerning the first sensor 9 and / or the second sensor 8.

[0102] Preferably, the first sensor 9 is defined by a switch.

[0103] Moreover, preferably, the second sensor 8 is defined by a switch.

[0104] According to one aspect, the first and second switches 9, 8 have respectively a first and a second activation contact 9A, 8A.

[0105] Other aspects of the actuation group will now be described.

[0106] The support body 4 has a support portion in which is disposed the seat 40.

[0107] The support portion preferably has a quadrangular shape and houses the seat 40.

[0108] The seat 40 is preferably defined by a hole, in which the parachute device 5 is housed.

[0109] The support portion is preferably, in use, fixed to the frame (not shown) of the roll-up closure wall.

[0110] The centrifugal brake 50 includes a first rotor part 50A which is, in use, mechanically coupled to the motor 3 (preferably indirectly, i.e. by means of other elements).

[0111] This first part 50A is therefore set in rotation when the motor 3 is activated.

[0112] The parachute device 5 is configured to block, under certain conditions (exceeding a pre-established rotation speed of the tubular body 2 corresponding to an excessive descent speed of the closure wall), a rotation of the tubular body 2, so as to substantially stop the fall of the curtain.

[0113] The parachute device 5 is disposed at the end 2B of the tubular body 2.

[0114] The actuation group 1, according to the first embodiment, comprises also a shaft 6, positioned inside the tubular body 2, having one end 6A, mechanically coupled (more precisely blocked from rotation) to the inner surface 2C of the tubular body 2, and another end 6B, coupled to the parachute device 5 (more precisely to the first rotor part 50A of the centrifugal brake 50).

[0115] This shaft 6, according to the first embodiment, therefore allows the motion of the motor 3 to be transferred to the first rotor part 50A of the centrifugal brake 50.

[0116] According to the first embodiment, the torsion spring 7 is disposed inside the tubular body 2.

[0117] The torsion spring 7, according to the first embodiment, is arranged so as to wrap around the shaft 6.

[0118] Note that, according to the first embodiment, due to the mechanical couplings, the torsion spring 7, the parachute device 5 and the shaft 6 define a single assembly (group) 100.

[0119] The unique assembly 100 can be connected, in a removable manner, to the tubular body 2.

[0120] Thus, advantageously, in the event of breakage of the spring 7 or intervention of the device parachute 5, it is possible to replace the entire set 100.

[0121] As is known, in fact, in the event of intervention of the parachute device 5, it is necessary to replace it.

[0122] With reference to the second sensor 8, it should be noted that the second switch 8 is disposed in a first seat 4C of the support body 4.

[0123] Preferably, the first switch 9 is fixed at a 4D region to the support body 4.

[0124] In a preferred embodiment, the tubular body 2 has an octagonal cross-section.

[0125] The motor 3 comprises a rotor connected to the tubular body 2.

[0126] The motor 3 is a tubular type motor.

[0127] Preferably, according to the first embodiment, the motor 3 is joined to the inner surface of the tubular body 2 by means of a flange 60.

[0128] Advantageously, an actuation group thus produced allows a reduction in size, making it suitable for small spaces such as those found for example in the case of roller shutters.

[0129] Advantageously, an actuation group thus produced is particularly practical during the assembly and installation phases.

[0130] According to one aspect, the centrifugal brake 50 comprises a discoidal body 51 having (on its outer surface) a concave portion 52.

[0131] According to one aspect, the support body 4 includes a stop portion 10 intended to come into contact with certain elements of the parachute device 5, more specifically to come into contact with at least one stop element 30 of the discoidal body 51 (when the centrifugal brake 50 intervenes).

[0132] According to one aspect, as illustrated in [Fig.5], the discoidal body 51 comprises a first portion 51A and a second portion 5 IB.

[0133] In a preferred embodiment, the centrifugal brake 50 comprises a toothed wheel 27, housed inside the discoidal body 51, more precisely inside the two portions 51A, 51B.

[0134] The gear 27 is defined by the rotor part 50A.

[0135] The wheel 27 has a plurality of depressions 52' and also has a central hole 53.

[0136] According to the first embodiment, the shaft 6 is coupled to part 50A of the parachute device 5 via the central hole 53.

[0137] The coupling via the hole 53 allows a rotation of the shaft 6 to be transmitted to part 50A of the parachute device 5, namely to the toothed wheel 27.

[0138] The centrifugal brake 50 comprises a plurality of movable locking elements 54.

[0139] Each movable locking element 54 is housed in each depression 52' of the wheel 27.

[0140] In a preferred embodiment, illustrated for example in [Fig. 11], the plurality of movable blocking elements 54 comprises spherical elements 54'.

[0141] In particular, when the centrifugal brake 50 is activated, the spherical elements 54' arranged in the depressions 52', due to the centrifugal force, come out of the depressions 52'.

[0142] More specifically, the spherical elements 54' are locked between the wheel 27 and the discoidal body 51, causing a movement of the discoidal body 51 following the rotation of the wheel 27.

[0143] In this way, as will be better described below, a condition for intervention of the centrifugal brake 50 of the parachute device 5 occurs.

[0144] According to one aspect, the discoidal body comprises a first edge 5 IC extending around at least a part of the first portion 51 A.

[0145] According to one aspect, the support body 4 has a first stop portion 4B configured to come into contact with the first edge 5 IC (or the stop element 30) when the centrifugal brake 50 is actuation.

[0146] In one embodiment, the discoidal body 51 is configured to rotate relative to the support body 4 in a first direction of rotation W1 following the actuation of the centrifugal brake 50.

[0147] In one embodiment, the first and second sensors (switches) 9, 8 are configured to generate, respectively, a first signal following the rupture of the torsion spring 7 and a second signal following the actuation of the centrifugal brake 50.

[0148] Advantageously, following the reception of the first and / or second signal, it is possible to cut off the power supply to motor 3, thus securing the actuation group.

[0149] The intervention condition of the centrifugal brake 50 and the rupture condition of the spring 7 will now be described in more detail.

[0150] As explained previously, the second switch 8 is configured to detect an actuation of the centrifugal brake 50 following an exceedance, by the closing wall, of a pre-established fall speed value.

[0151] We will explain what happens in this condition, in which the intervention of the centrifugal brake 50 preserves the mechanical integrity of the curtain group and the safety of the users, thus acting in all effects as an active safety element.

[0152] Note that the fact that the closing wall exceeds a pre-established value of falling speed is an exceptional event, leading to the breakage of electrical and / or mechanical components of the motor, or motor brake, or other elements of the motor-closing moving wall kinematic chain (for example, of the spring itself).

[0153] In such circumstances, when the closing wall accelerates downwards, the rotor part 50A of the centrifugal brake is also accelerated; as a result, the wheel 27 is accelerated, transferring a centrifugal acceleration onto the rolling elements 54 which are pushed radially towards the radial periphery, i.e. towards the inner wall of the discoidal body 51.

[0154] The rolling elements 54 then fit into the radially peripheral zone between the discoidal body 51 and the wheel 27, which causes the wheel 27 and the discoidal body 51 to become rotationally fixed in all effects.

[0155] Under these conditions, due to the rotation of the wheel 27 driven by the fall of the movable wall, there also occurs a rotation of the discoidal body 51 relative to the support body 4.

[0156] The rotation of the discoidal body 51 relative to the support body 4 causes the seat 52, on which the second switch 8 is active, to move relative to the support body 4, namely in relation to the second sensor 8 (which, let us recall, is in a fixed position in relation to the support body 4).

[0157] As a result, the slider 8A of the second switch 8 is no longer active in the seat 52 but in another peripheral area of ​​the discoidal body 51 (having a different radial height), and therefore passes from one logic state (preferably "closed") to another logic state (preferably "open").

[0158] Switching the second switch 8 from the logic state "closed" to the logic state "open" inhibits the actuation of the motor 3.

[0159] In fact, the second switch 8 is arranged in series in the electrical supply circuit of the motor 3.

[0160] This second signal from the second switch 8 is therefore, as can be understood, a signal for the intervention of the centrifugal brake 50.

[0161] With reference to the first sensor (switch) 9, it should be emphasized that it is configured to detect a break in the torsion spring 7 or a condition of the spring 7 being unloaded.

[0162] In other words, the first switch 9 detects whether the torsion spring 7 is no longer in a state of tension (i.e., of accumulation of elastic energy).

[0163] As is known, in fact, when the closing wall passes from the open position of the access bay to the closed position of the access bay, the torsion spring 7 is compressed, accumulating elastic energy.

[0164] The operating mechanism of the actuation group, with reference to the first sensor 9, is as follows.

[0165] When the spring 7 is unloaded, the other spring 25 maintains the activation body 20 in a predetermined angular position (first position) relative to the support body 4.

[0166] This first angular position of the activation body 20 is illustrated in [Fig.7], with reference to the first embodiment, and in Figures 15 and 17, with reference to the second embodiment.

[0167] In this first angular position of the activation body 20, the first sensor (switch) 9 has a predetermined logic state (preferably, "open").

[0168] In fact, the first sensor 9, more precisely the activation slider 9A of the switch 9, is operationally active at the level of a first zone 29A ([Fig. 10]) of the activation body 20.

[0169] In such circumstances, therefore, the first sensor 9 can be advantageously used to provide a "discharged" spring 7 signal, which can be used for example by technical operators during the installation / maintenance phase.

[0170] Due to the rotation of the motor 3 (in the direction indicated by W1), the rotational movement of the motor 3 is transferred to the end 7 A (distal with respect to the centrifugal brake 50 and proximal to the motor 3) of the spring 7.

[0171] The rotation of the end 7A (distal with respect to the centrifugal brake 50 and proximal to the motor 3) of the spring 7 rotates the activation body 20 to its angular stop position, i.e. in a second angular position (position defined by the relative dimensioning of the projections 23B and the recesses 23A).

[0172] This second angular position of the activation body 20 is illustrated in [Fig.6], with reference to the first embodiment, and in Figures 16 and 18, with reference to the second embodiment.

[0173] From this second angular position of the activation body 20, the additional rotation of the motor 3 (in the direction indicated as Wl) determines the load of the spring 7, namely the accumulation of elastic energy in the spring 7.

[0174] In this second angular position of the activation body 20, the other spring 25 is compressed.

[0175] Note that the spring 25 would tend, in the absence of external forces acting on the activation body 20, to push the activation body 20 from the second angular position to the first angular position.

[0176] It should also be noted that in this second angular position of the activation body 20, the logic state of the first sensor 8 (logic state of "closed") is different from that of the first position (logic state of "open").

[0177] In the event of breakage of the spring 7, the activation body 20 is free from the constraint of the spring 7, and therefore free to rotate from the second angular position to the first angular position.

[0178] Since the other spring 25 is compressed, in such circumstances of rupture of the spring 7, the spring 7 discharges the accumulated elastic energy, and determines a rotation of the activation body 20 from the second position to the first position.

[0179] Thus, thanks to the movement of the activation body 20, the first sensor 9 is able to change its logic state.

[0180] According to the principle underlying the invention, this determines a switching of the first sensor 9 which passes from one logic state to another.

[0181] This switching of the first sensor 9 corresponds to a breaking signal of the spring 7.

[0182] We will now describe some differences between the first embodiment (already described above) and the second embodiment (which will now be introduced), particularly with regard to the fixing of the closing wall and the transfer of the movement from the motor 3 to the centrifugal brake 50 and the spring 7.

[0183] In this second embodiment, the spring 7 is mounted outside the tubular body 2.

[0184] In this case, the actuation group includes external bushings 32, rotated by the rotor 3.

[0185] The closing wall is fixed to these sockets 32.

[0186] These bushings 32 receive the movement of the tubular body 2, either directly or through interposed elements.

[0187] The actuation group also includes a bushing 80, which is free to rotate, i.e. not driven by the motor 3.

[0188] According to this second embodiment, one end 7B of the spring is directly attached to the activation body 20.

[0189] According to this second embodiment, the activation body 20 is provided with limiting recesses 23A and the support body 4 includes projections 23B, defined by screws and / or sockets keyed onto screws, which are secured, with play, inside said recesses 23A.

[0190] Note that the shape of the recesses 23A, with a play in relation to the projections 23B, determines the possibility for the activation body 20 to rotate relative to the support body 4.

[0191] Note that the second embodiment, in the principle of operation with respect to the first sensor 9 or the second sensor 8, is substantially equivalent to the first embodiment.

[0192] The actuation group, according to the second embodiment, is without a shaft 6: the movement to the bushings 32 is transmitted by the tubular body 2 (by means of a form coupling which allows the transmission of the torsional torque) or by elements which are interposed between the tubular body 2 and the bushings 32, allowing the transmission of the rotational movement.

Claims

Demands

1. Actuation group for a roll-up closure wall comprising: - a tubular body (2) having a principal development direction (D) and having a first and a second end (2A, 2B); - a motor (3), configured to rotate the tubular body (2); - a support body (4) having a housing seat (40); - a parachute device (5), housed in the seat (40) of the support body (4) and comprising a centrifugal brake (50), functionally coupled, in use, to the tubular body (2), the parachute device (5) being configured to activate and block a rotation of the tubular body (2) when a pre-established rotational speed of the tubular body (2) is exceeded; - at least one torsion spring (7), having a first end (7A) coupled to the motor (3) to be rotated; - a first sensor (9) configured to detect a signal relating to a state of the torsion spring (7).

2. Actuation group according to the preceding claim, wherein the first sensor (9) is associated, in particular fixed, with the support body (4).

3. Actuation group according to the preceding claim, comprising a second sensor (8), disposed in the support body (4) and configured to detect an actuation of the centrifugal brake (50).

4. An actuation group according to any one of the preceding claims, comprising: - an actuation body (20), partially rotatable relative to the support body (4); and in which: - the torsion spring (7) also has a second end (7B), opposite to the first end (7A), functionally connected, directly or indirectly, to the actuation body (20); - the first sensor (9) is configured to switch following a rotation of the actuation disc (20).

5. Actuation group according to the preceding claim, wherein the activation body (20) is configured to rotate, relative to the support body (4), by an angle of less than 45°.

6. Actuation group according to any one of the preceding claims 4 or 5, wherein the actuation body (20) comprises a housing seat (21), and wherein the second end (7B) is fixed to the actuation body (20), inserted inside the housing seat (21).

7. Actuation group according to any one of the preceding claims 4 or 5, wherein the actuation body (20) has the shape of a disc.

8. Actuating group according to any one of the preceding claims 4 or 5 or 6, comprising a spring (7) retaining body (22), to which the second end (7B) of the spring (7) is attached, and in which the activating body (20) is coupled to the retaining body (22).

9. Actuation group according to any one of the preceding claims from 4 to 8, wherein one, between the activating body (20) and the supporting body (4), comprises limiting recesses (23A) and the other, between the supporting body (4) and the activating body (20), comprises projections (23B) configured to fit into said recesses (23A); said limiting recesses (23A) and said projections (23B) being configured to define partial rotational constraints of the activating body (20) with respect to the supporting body (4).

10. Actuation group according to any one of the preceding claims from 4 to 9, wherein the activation body (20) has an activation protrusion (24A) or an activation recess, configured to bind with the first sensor (9) when the activation body (20) is in a predetermined angular position, relative to the support body (4).

11. Actuation group according to any one of the preceding claims from 4 to 10, comprising another spring (25), functionally coupled to the activating body (20) and the support body (4).

12. Actuation group according to the preceding claim, wherein the support body (4) includes a seat (26) for housing said another spring (25), and in which one end of said other spring (25) is coupled to the activation body (20).

13. Actuation group according to any one of the preceding claims 11 or 12, wherein said other spring (25) is a linear spring.

14. Actuation group according to any one of the preceding claims, comprising a second sensor (8), disposed in the support body (4), configured to detect an actuation of the centrifugal brake (50) following an exceedance of the falling speed of the closing wall compared to a pre-established value.

15. Actuating group according to any one of the preceding claims, comprising a control unit, connected to the first sensor (9) and configured to emit an alarm signal according to a state of the signal received from said first sensor (9).

16. Actuating group according to claim 15, comprising a signaling unit, in communication with the control unit, configured to make available a signaling concerning the first sensor (9) and / or the second sensor (8).

17. Actuation group according to any one of the preceding claims, wherein the motor (3) comprises a rotor connected to the tubular body (2).

18. Actuation group according to any one of the preceding claims, wherein the support body (4) includes a stop portion (10) intended to come into contact with the parachute device (5) when the centrifugal brake (50) is actuation.

19. Actuation group according to any one of the preceding claims, wherein the centrifugal brake (50) comprises a discoidal body (51).

20. Actuation group according to any one of the preceding claims and claim 19, wherein the discoidal body (51) has a concave portion (52).

21. Actuation group according to any one of the preceding claims and claims 3 and 20, wherein the second sensor (8) is in contact with said concave portion (52) when the centrifugal brake (50) is not actuated.

22. Actuation group according to any one of the preceding claims from 19 to 21, wherein the discoidal body (51) comprises a first portion (51A) and a second portion (51B).

23. Actuation group according to the preceding claim, wherein the discoidal body (51) comprises a first edge (51C) extending around at least the first portion (51A).

24. Actuation group according to the preceding claim, wherein the support body (4) has a first stop portion (4B) configured to potentially come into contact with the first edge (51C) when the centrifugal brake (50) is actuated.

25. Actuation group according to any one of claims 22 to 24, wherein the discoidal body (51) comprises a second edge (51D) extending around at least the second portion (51B).

26. Actuation group according to the preceding claim, wherein the support body (4) has a second stop portion (4A) configured to come against the second edge (51D).

27. ​​Actuation group according to any one of the preceding claims and claim 19, wherein the centrifugal brake (50) comprises a toothed wheel (27), housed inside the discoidal body (51) and having a plurality of depressions (52') and a central hole (53).

28. Actuation group according to the preceding claim, wherein the centrifugal brake (50) comprises a plurality of movable locking elements (54), each movable locking element (54) being housed at each depression (52') of the toothed wheel (27).

29. Actuation group according to claim 28, wherein the plurality of movable locking elements (54) comprises spherical (54') or cylindrical elements.

30. Actuation group according to any one of the preceding claims, wherein the parachute device (5) is configured to rotate relative to the support body (4) in a first direction of rotation (Wl) following actuation of the centrifugal brake (50).

31. Actuation group according to any one of the preceding claims, wherein the tubular body (2) has an octagonal cross-section.

32. Actuation group according to any one of the preceding claims, wherein the first sensor (9) is configured to generate respectively a first signal following the rupture of the torsion spring (7).

33. Actuation group according to any one of the preceding claims, wherein the first sensor (9) is defined by a switch.

34. Actuation group according to any one of the preceding claims and claim 3, wherein the second sensor (8) is defined by a switch.

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