Detachable thrust device for opening a door

Abstract

The present invention relates to a thrust device (1) for opening a door (2), which can be assembled from a ready-to-assemble set of at least three parts (1-1,1-2,1-3) using reversible attachment devices (4c-4d, 7g-7h), which attachment means can be activated and deactivated manually and can maintain lower (4a, 7b) and upper (4b, 7a) portions of lower (4) and upper (7) support bars in alignment.

Description

[0001] The present invention relates to a removable pushing device for opening a door by pushing, capable of exerting a thrust on the vertical surface of the door and pushing it in. The present invention also relates to a method for exerting a thrust preferably of at least 50 kN on a door or any other vertical flat surface from external support points.

[0002] More particularly, the invention relates to a device for opening, as quickly as possible from a set of at least 3 parts ready to be assembled, by force, without shock and silently, any type of door for residential, industrial or other premises.

[0003] These devices are intended to be used primarily by emergency services such as firefighters or civil protection, or by special police or gendarmerie brigades or even special army units, and are intended in particular to open the doors of armoured houses.

[0004] Already known in FR 2 825 354 and FR 2 944 709 is a device for exerting a thrust on the vertical surface of a door to open said door by pushing it in. These devices are perfectly suited to opening doors that open by pushing or pulling, from the face of said door where the thrust or pull must be exerted on said door to open it. These devices operate by pushing on the door thanks to supports at three levels, namely on the ground, on the central part of the door panel, where the door is pushed in, and on the upper part or lintels of the door retaining and stop frame, where the direct thrust is exerted by a jack.

[0005] These earlier devices include: a lower support bar consisting of a preferably hydraulic cylinder, an intermediate sole and an upper support bar, said cylinder comprising a cylinder body one end of which is fixed in an articulated manner, preferably removably, to a lower sole supporting the ground, and a movable rod one end of which is fixed in an articulated manner, preferably removably, to said intermediate sole supporting the door, and said upper support bar being fixed in an articulated manner, more preferably removably, at one of its ends to said intermediate sole.

[0006] The articulation of the end of the movable rod of said jack on said intermediate sole plate allows it to be arranged at an inclination preferably of 20 to 35° relative to the vertical, so as to be able to exert a thrust preferably of at least 50 kN on said intermediate sole plate when said intermediate sole plate is applied in support on said door or vertical flat surface and said jack is in support on a lower external support point, preferably on the ground.

[0007] Likewise, the articulation of said upper support bar on said intermediate sole plate makes it possible to arrange said bar substantially vertically so as to be able to apply its free end directly in support on an upper external support point preferably constituted by the frame of said door or a ceiling, or a horizontal flat surface situated above said vertical flat surface. Here, the term "free end" means the end of said bar which is not fixed to said intermediate sole plate.

[0008] The device of FR 2 825 354 is perfectly suited for opening doors that open by pushing on the side where the pushing device is located on the door, i.e. so-called "push" doors that open towards the inside of the room from the outside of which it is sought to be opened. In practice, the device works on push doors thanks to its supports at three levels, namely: on the ground, on the door and, on the upper part or lintel of the retaining and stop frame of the door.

[0009] In fact, the upper end of the upper support bar abuts below and against the part of the lintel of the door frame projecting from the vertical plane of the door surface and against which the upper end of the door abuts. This part of the lintel located lower than the upper end of the door ensures that the door is held in its frame when the door is closed by pulling it.

[0010] FR 2 944 709 provides a device for pushing on a door with a vertical flat surface suitable for a pulling door, i.e. one which is intended to open from the outside, the retaining belt of the door frame being located on the inside. This device for opening by pushing a door, capable of exerting a push on the vertical surface of the door and pushing it in, when the device is positioned against the door on the side where it opens by pulling it, comprises an upper support device fixed in an articulated manner, preferably in a removable manner, to the upper end of said upper support bar, said upper support device comprising at least one wedging and blocking part capable of allowing the rotational articulation of said wedging and blocking part relative to the upper end of said upper support bar.Said wedging and blocking device thus fulfils the same technical effect as the part of the lintel projecting from the vertical plane of the door serving as a stop, in a door opening device without this blocking and wedging device at the upper end of the upper support bar, when the door opening device is located on the side where the door opens by pushing.

[0011] It is understood that the terms "upper" / "lower" and "above" / "below" refer to the two opposite directions in the longitudinal direction of the support bars, when the device is in position to exert a thrust on a vertical surface.

[0012] The jack is intended to rest on the ground, but could also rest on a lower external support point. Similarly, the intermediate sole is intended to rest on the door, but could rest on a middle external support point.

[0013] Here, "articulatedly" means that the two parts fixed to each other can pivot relative to each other at least around a horizontal axis when the longitudinal directions of said lower support bar and upper support bar are located in the same vertical plane.

[0014] Other thrust devices are known from GB 2 236 803 A, WO 2010 / 125263 A1 and FR 2 983 736 A1.

[0015] The devices described in these known documents are not optimally adapted for easy transport and implementation, in particular because the upper support bar and lower support bar are each made of a single piece and therefore of a relatively long length. In its current configuration, the device is bulky, complicated to carry, particularly during interventions on the upper floors of a building, leading to risks of impact on the walls as well as the handrails of the stairwells, and not easy to install on the door or remove after implementation. This bulkiness also affects its packaging and transport for carrying over long distances, because currently the device can only be separated into two very long elements comprising (a) the lower support bar with the jack and the lower sole and (b) the upper support bar with the intermediate sole and the upper support device.

[0016] The aim of the present invention is to provide a device that overcomes these drawbacks. To this end, the present invention provides a door opening device that can be dismantled into at least 3 parts manually and without any tools, which allows for easier carrying because it can be shared between several people if necessary, and without the risk of shock in stairwells when carrying it up and down the floors of a building, and finally it can be assembled in a few seconds on the door in question. It can also be packaged in a much smaller carrying case than the one currently used, which can be carried by a single person.

[0017] The present invention, defined in claim 1, provides a door opening push device which can be mounted from a ready-to-assemble assembly of at least 3 parts by reversible fixing devices which can be activated and deactivated manually, and which are capable of maintaining in rectilinear alignment lower and upper parts of the lower and upper support bars.

[0018] The present invention provides a pushing device for exerting a push on a door or any other vertical flat surface such as a partition, comprising a lower support bar, an intermediate support sole and an upper support bar, and preferably a lower support sole, each of said lower support bar and respectively upper support bar being capable of being actuated in telescopic extension in which the pushing device is capable of being assembled from a ready-to-assemble assembly of at least 3 parts comprising two reversible fixing devices which can be activated and deactivated manually,capable of carrying out the reversible fixing of the lower and upper parts of each of said lower support bar and respectively upper support bar and capable of maintaining said lower support bar and upper support bar in rectilinear alignment when they are actuated in said telescopic extension.,

[0019] The present invention provides a pushing device in which: said lower support bar comprises a lower part comprising a cylinder, preferably a hydraulic cylinder, said cylinder comprising a cylinder body, the lower end of which is preferably fixed in an articulated manner in rotation on said lower support sole, and a first cylinder rod, and an upper part of the lower support bar being fixed or capable of being fixed in an articulated manner in rotation on said intermediate sole, and said upper support bar comprises a lower part fixed or capable of being fixed in an articulated manner in rotation on and relative to said intermediate sole, and an upper part of the upper support bar preferably comprising an upper support device, said upper support bar being operable in extension in a telescopic manner to vary the distance between said lower part and upper part of the upper support bar,characterized in that: said first cylinder rod is fixed or capable of being fixed reversibly via a first reversible fixing device to said upper part of the lower support bar, the telescopic actuation of said first cylinder rod being capable of varying the distance between said cylinder body and said upper part of the lower support bar, said first reversible fixing device when activated being capable of maintaining said upper part of the lower support bar in rectilinear alignment with said first cylinder rod to which it is fixed during the telescopic actuation of said first cylinder rod, said upper support bar comprises or cooperates with a second rod extending at least partly inside said upper support bar,said second rod being manually or electrically actuable in said telescopic extension to vary said distance between said lower part and upper part of the upper support bar, said second rod being fixed or capable of being fixed reversibly via a second reversible fixing device to said upper part of the upper support bar, said second fixing device when activated being capable of maintaining said lower part and said upper part of the upper support bar, fixed to each other in rectilinear alignment with each other during telescopic actuation of said second rod.

[0020] By "varying the distance between said lower part and upper part of the upper support bar" is meant that it is a question of varying the ends of said lower part and upper part of the upper support bar fixed or capable of being fixed on said intermediate sole and respectively said upper support sole, and by "fixed in an articulated manner in rotation on said sole fixed in an articulated manner in rotation on and relative to said sole.." is meant that it is an articulation in rotation relative to said sole concerned.

[0021] We understand that: said second rod extends partly inside a tubular wall of the upper end of said lower part and partly outside said upper part of the upper support bar when it is in said telescopic extension; and the fixing of said upper part of the lower support bar in rectilinear alignment with said first movable rod of the jack allows a variation of the distance between said upper part of the lower support bar and said jack body of the jack during telescopic actuation of said first jack rod, and the fixing of said second rod in rectilinear alignment with said upper part of the upper support bar,via said second reversible attachment allows a variation of the distance between said intermediate sole to which the lower part of the upper support bar bar is fixed by rotational articulation and said upper part of the upper support bar bar, during telescopic actuation of said second rod, and when said first cylinder rod is detached from said upper part of the lower support bar by deactivation of said first reversible attachment device, and said second rod is detached from said upper part of the upper support bar bar by deactivation of said second reversible attachment device, said pushing device is capable of being stored in at least 3 independent parts, preferably of substantially the same length comprising,said upper part of the lower support bar and said lower part of the upper support bar remaining fixed to a said intermediate sole, able to fold against each other longitudinally, detached from said jack and respectively from said upper part of the upper support bar, preferably having substantially the same length.

[0022] More particularly still, said first fixing device comprises an upper end part of said first jack rod capable of cooperating and being reversibly fixed to a lower end part complementary to said upper part of the lower support bar.

[0023] More particularly still, said first fixing device comprises a said upper end portion of said first cylinder rod of male shape, preferably outside said cylinder body when said first cylinder rod is in the retracted position, capable of engaging and being reversibly fixed in a said complementary lower end portion of female shape such as a first cavity of said upper portion of the lower support bar.

[0024] More particularly still, said upper terminal part of the first cylinder rod and said first cavity are of complementary cylindrical shapes capable of entering into one another to activate said first fixing device and deactivate it under manual control, and of the same length d1 sufficient to maintain said rectilinear alignment, preferably of smaller diameter than that of said first cylinder rod.

[0025] In another embodiment, said first fixing device comprises an upper end portion of said first cylinder rod in the form of a cavity capable of receiving and being reversibly fixed to a said lower end portion of male shape complementary to said upper portion of the lower support bar.

[0026] Preferably, said first cylinder rod comprises two telescopic elements. It is understood that said upper end portion of the first cylinder rod is at the end of the rod element furthest from the cylinder body when the cylinder rod is extended. This embodiment is advantageous because it allows the cylinder body to be of shorter length while being able to receive the retracted cylinder rod inside the cylinder body and offers safety with regard to the risk of buckling of the cylinder rod when the thrust device is implemented.

[0027] More particularly still, said second fixing device comprises an upper end part of said second rod capable of cooperating and being fixed reversibly to a complementary lower end part of said upper part of the upper support bar.

[0028] More particularly still, said second fixing device comprises a said upper end portion of said second rod, preferably of smaller diameter than that of said second rod, capable of engaging and being reversibly fixed in a second cavity at the lower end of said upper portion of the upper support bar.

[0029] More particularly still, said upper terminal part of the second rod and said second cavity are of complementary cylindrical shape capable of entering into one another to activate said second fixing device and deactivate it under manual control and of the same length d2 sufficient to maintain said rectilinear alignment.

[0030] In another embodiment, said second fixing device comprises a said upper end portion of said second rod in the form of a cavity capable of receiving and being reversibly fixed to a complementary male end portion at the lower end of said upper portion of the upper support bar.

[0031] More particularly still, said second rod comprises a thread which is capable of cooperating with a peripheral wheel crossed by said second rod such that the manual rotation of said wheel causes said relative sliding of said second rod with respect to said lower part of the upper support bar.

[0032] In practice, we use a worm screw or ball screw system which allows us to transform a rotational movement into a sliding movement.

[0033] More particularly, at least one of said first or second fixing device comprises: a) a first or respectively second transverse locking finger capable of cooperating with a first or respectively second spring at the bottom of a first or respectively hollow housing at the level of said upper end part of the first or respectively second rod, said first or respectively second locking finger being capable of retracting by compression of said first or respectively second spring when said first or respectively second rod begins to enter said first or respectively second cavity, and said first or respectively second locking finger being capable of engaging in a first or respectively second opening at the level of the tubular wall of said first or respectively second cavity,by extension of said first or respectively second spring when said terminal part of said first or respectively second rod is completely engaged in said first or respectively second cavity to activate said first or respectively second reversible fixing device, b) a first or respectively second unlocking push button arranged inside said first or respectively second opening at the tubular wall of said first or respectively second cavity, said first or respectively second unlocking push button being capable of being manually controlled to push in and retract said first or respectively second transverse locking finger by compression of said first or respectively second spring at the bottom of said first or respectively second hollow housing,to deactivate said first or respectively second reversible fixing device.

[0034] In one embodiment, said upper support device is fixed in an articulated manner, preferably removably, to the upper end of said upper support bar, said upper support device comprising at least one wedging and blocking part capable of allowing the opening of a pull door.

[0035] More particularly, at least one of said lower sole and intermediate sole comprises a flat support, one face of which is intended to come to bear on the ground or respectively said door or vertical flat surface, comprising anti-slip elements, preferably hard points, and the other face of which comprises articulation means on which articulated fixing means are fixed.

[0036] More particularly still, said intermediate and lower soles comprise a flat support and articulation means constituted by yokes on one face of said flat supports, yokes on which are mounted, preferably removably, lugs forming articulation axes in holes in said yokes and said ends of said first extension bar and second extension bar thus allowing their articulation on said soles. . More particularly still, the pushing device according to the invention comprises: - a hydraulic unit delivering a pressure preferably of at least 250 bars, more preferably mounted on a portable chassis on the back of an operator, and - said hydraulic unit being connected preferably by a single hose to a single-acting hydraulic cylinder, more preferably by means of a handle allowing the opening and closing control of the hydraulic fluid supply and return valves of said single-acting hydraulic cylinder.

[0037] The present invention also provides an assembly (or kit) ready to be assembled to form a pushing device according to the invention, when said first cylinder rod is detached from said upper part of the lower support bar by deactivation of said first reversible fixing device, and said second rod is detached from said upper part of the upper support bar by deactivation of said second reversible fixing device, said assembly comprising at least 3 independent parts preferably of substantially the same length comprising: (1) a first part comprising said lower part of the lower support bar comprising said cylinder whose cylinder body is preferably fixed or capable of being fixed in a rotatably hinged manner on said lower support sole, said first cylinder rod is in the retracted position inside the cylinder body, (2) a second part comprising: (a) said upper part of the lower support bar fixed in a rotatably hinged manner on said intermediate sole, and (b) said lower part of the upper support bar fixed in a rotatably hinged manner on said intermediate sole, said second rod being retracted at least partly inside a tubular termination of said lower part of the upper support bar, and (c) said upper part of the lower support bar and said lower part of the upper support bar,being actuated in rotation relative to said intermediate sole so as to be arranged against each other or opposite each other substantially parallel, and (3) a third part comprising said upper part of the upper support bar, bar preferably comprising a said upper support device.

[0038] The dismantled pushing device can be stored in a small suitcase.

[0039] The present invention also provides a method for exerting a thrust of preferably at least 50 kN on a door or any other vertical flat surface from external support points, characterized in that a thrust device according to the invention is used, and in which the steps in which a) said lower support bar is arranged with said cylinder in the retracted position, preferably at an inclination of 20 to 35° relative to the vertical, with - said intermediate sole bearing on said door or vertical flat surface, preferably near a lock or door handle or the hinges of said door, - said cylinder being in the retracted position bearing on a lower external support point, preferably the ground, preferably by means of a said lower sole, - said upper support bar being actuated in said telescopic extension to bear against an upper external support point, preferably a lintel of a door frame or a ceiling or a horizontal flat surface located above said vertical flat surface, and b) said first movable rod of said cylinder is operated in extension so as to exert a said thrust on said intermediate sole.

[0040] More specifically, the following steps are implemented in which: -before step a), the assembly is carried out between the lower part and upper part of the lower support bar and between the lower part and upper part of the upper support bar, by manually activating said first and second fixing devices before placing said lower support bar and respectively upper support bar in position against the door, and -after step b), said first and second fixing devices are manually deactivated to respectively store separately said lower part of the lower support bar and said upper part of the upper support bar.

[0041] More particularly, a thrust is exerted on an armoured door to force it open by exerting a thrust on said intermediate sole until an increase in the inclination of said jack is obtained by an angle of at least 3°, preferably an increase of 5 to 20°.

[0042] Other characteristics and advantages of the present invention will emerge more clearly on reading the description which follows, given in an illustrative and non-limiting manner, with reference to the appended drawings in which: - there figure 1 represents the thrust device according to the invention disassembled into 3 separate independent parts, -the figures 2A And 2B represent the pushing device according to the invention assembled with said lower support bars 4 and upper support bar 7 arranged against each other ( figure 2A ) and in position against the door ( figure 2B ), - THE figures 3A And 3Brepresent the pushing device according to the invention t applied to the door ready to exert a push ( figure 3A ), and in the process of pushing ( figure 3B ), - THE figures 4A And 4B represent the pushing device according to the invention with said first rod 4-2 in the maximum extension position and the second rod 7c in the maximum extension position, the device being assembled ( figure 4A ) and with the 3 parts 1-1,1-2 and 1-3 disassembled ( figure 4B ), -THE figures 5A et 5B represent the detail of the first fixing device ( figure 5A ) and the second fixing device ( figure 5B ) -there figure 5C shows the schematic detail in longitudinal section of the lower tubular part 7b of the upper support bar 7 with the second rod 7c, - the figures 6A et 6B separately represent the lower part 7b ( figure 6A ) and the upper part 7a ( figure 6B ) of another embodiment of the upper support bar 7, with another embodiment of said second reversible fixing device, - the figure 7A et 7B represent assembled together the lower part 7b and the upper part 7a of the upper support bar 7 of the figures 6A-6B .

[0043] The pushing device according to the invention disassembled, as shown figure 1 includes 3 independent parts 1-1,1-2,1-3 of lengths L01, L02 and L03 not exceeding L03=750mm including: (1) a first part 1-1 comprising a lower part 4a of the lower support bar 4 comprising a jack whose jack body 4-1 is fixed on the side of its lower end on a lower support sole 5 capable of resting on the ground 10 by a rotational articulation device 4r1, the first telescopic jack rod 4-2 being in the maximum retraction position inside the jack body so that only an upper end part 4-2c of the jack rod protrudes from the jack body by a distance d1 of approximately 100mm, and (2) a second part (1-2) comprising: a) an upper part 4b of the lower support bar 4 fixed at one end by a rotational articulation device 4r2 on said intermediate sole 6 and whose other end contains a first cavity (not visible figure 1 ) capable of receiving said upper end portion 4-2c of the jack rod and fixing thereto by a first reversible fixing device explained below, and (b) the tubular lower portion 7b of the upper support bar 7 fixed at one end by a rotational articulation device 7r1 on said intermediate sole 6, a second telescopic rod 7c being retracted as far as possible inside said tubular lower portion 7b by rotational actuation as described below using a wheel 7e arranged at the other end of said tubular lower portion 7b, of which only an end portion 7d of length d2 of approximately 100mm of said second rod protrudes from said tubular lower portion 7b, and (c) said upper portion 4b of the lower support bar 4 and said lower portion 7b of the upper support bar 7,being here actuated in rotation relative to said intermediate sole so as to be arranged against each other substantially parallel, and (3) a third part 1-3 comprising an upper part 7a of the upper support bar bar 7 comprising at its upper end an upper support device 7a1 and in its lower end part a second cavity (not visible, figure 1 ) capable of receiving said terminal part 7d of said second cylinder rod and fixing it there by a second reversible fixing device explained below.

[0044] On figures 2A And 2B , the pushing device according to the invention is shown assembled with said lower support bar 4 and upper support bar 7 assembled and arranged folded against each other ( figure 2A ) and deployed in rotation with the intermediate sole 6 resting against the door 2, the lower support bar 4 inclined at an angle of approximately α = 20 to 35° relative to the horizontal from the lower sole 5 resting on the ground 10, and the upper support bar 7 vertical against the door ( figure 2B ), said first and second rods being in the maximum retracted position, each assembled bar 4 and 7 has a length L1'=L1+L2 and respectively L2'=L3+L4 of no more than 1500mm.

[0045] On the figures 3A And 3B , the pushing device according to the invention 1 is shown assembled and applied to the door ready to exert a push with said first rod still in the retracted position and said second rod 7c in the extended position to block the upper support device 7a1 at the upper end of the upper support bar 7 against the lintel 2a of the door ( figure 3A ), and in the process of pushing with the said first rod 4-2 in the extension position and the second rod 7c in the extension position ( figure 3B ).

[0046] THE figures 4A-4B And 5A-5C allow to better describe the structure and operation of the pushing device 1 of the invention.

[0047] On the figure 4A , the cylinder rod 4-2 is shown in maximum extension, itself consisting of two telescopic elements 4-2a and 4-2b of length L1a and L1b such that L1a+L1b is greater than L1, the length of the cylinder body, with L1a and L1b less than L1. The upper end part 4-2c is arranged at the end of the second element 4-2b of the cylinder rod 4-2.

[0048] There figure 5A shows the detail of the first fixing device. the cylinder 4 being in the retracted position with only the end portion 4-2c of smaller diameter than the second cylinder rod element 4-2b protruding outside the cylinder body 4-1. The end portion 4-2c is of diameter and length d1 substantially identical to those of the first cylindrical cavity 4b1 at the lower end of the upper portion 4b of the lower support bar.

[0049] The first fixing device 4c, 4d between the first rod 4-2 and the upper part 4b of the lower support bar 4 comprises: a) a first transverse locking finger 4c1 capable of cooperating with a first spring 4c2 at the bottom of a first hollow housing 4c3 at the level of said upper end portion 4-2c of the first rod 4-2, said first locking finger 4c1 being capable of retracting by compression of said first spring 4c2 when said first rod 4-2 begins to enter said first cavity, and said first locking finger 4c1 being capable of engaging in a first opening 4d2 at the level of the tubular wall of said said first cavity 4b1, by elastic extension of said first spring 4c2 when said end portion 4-2c of the first rod 4-2 is completely engaged in said first cavity 4b1 to activate said first reversible fixing device, b) a first unlocking push button 4d1 disposed inside said first second opening 4d2 at the level of the tubular wall of the said first cavity 4b1,said first unlocking push button 4d1 being capable of being manually controlled to push in and retract said first transverse locking finger 4c1 by compressing said first spring 4c2 at the bottom of said first hollow housing 4c3, to deactivate said first reversible fixing device and thus be able to remove the terminal part 4-2c of the cylinder rod outside the first cavity 4b1.,

[0050] On the figure 4B , the thrust device according to the invention is shown with said second rod 7c in the maximum extension position with its upper terminal part 7d of length d2 of smaller diameter than the second rod 7c. On the figures 5B et 5C , the thread of the second rod 7c and an annular wheel 7e rotatable relative to the longitudinal axis XX' of the upper support bar 7 are shown, arranged at the upper end of the tubular wall of the lower part 7b of the upper support bar 7 to form with the second threaded rod 7c a ball screw system. The thread of the second rod 7c cooperates with the wheel 7e so that a manual control of rotation of the wheel 7e causes a sliding in longitudinal translation along the axis XX' of the second rod in part 7c1 inside the tubular wall 7b and through the wheel 7e to extend in part 7c2 over a length d3 outside the lower tubular part 7b. On the figure 5B , the second rod 7c is in the maximum retracted position with only the upper end portion 7d protruding from the lower tubular portion 7b of the upper support bar.

[0051] THE figures 5B et 5C show the detail of the second fixing device 7g, 7h between the end part 7d of the second rod 7c and the second cylindrical cavity 7a2 at the lower end of the upper part 7a of the upper support bar of substantially identical diameter and length d2. The second fixing device 7g, 7h, comprises: a) a second transverse locking finger 7g1 capable of cooperating with a second spring 7g2 at the bottom of a second hollow housing 7g3 at the level of said upper end portion 7d of the second rod,7c, said second locking finger 7g1 being capable of retracting by compression of said second spring 7g2 when said second rod 7c begins to enter said second cavity 7a2, and said second locking finger 7g1 being capable of engaging in a second opening 7h2 at the level of the tubular wall of said said second cavity, by extension of said second spring 7g2 when said end portion 7d of said second rod 7c is completely engaged in said second cavity to activate said second reversible fixing device, b) a second unlocking push button 7h1 disposed inside said second opening 7h2 at the level of the tubular wall of said second cavity,said second unlocking push button 7h1 being capable of being manually controlled to push in and retract said second transverse locking finger 7g1 by compressing said second spring 7g2 at the bottom of said second hollow housing 7g3, to deactivate said second reversible fixing device and thus be able to remove the terminal part 7d of the second rod 7c outside the second cavity 7a2.,

[0052] On the figure 6A , the lower part 7b of another embodiment of the upper support bar 7 is shown with a said upper end part 7d in the form of a cavity and the second rod 7c in the retracted position inside the tubular wall of the lower part 7b of the upper support bar 7. The sliding of the second rod 7c being able to be controlled by an electric motor 8 powered by a battery 8a arranged inside the tubular wall of the lower part 7b of the upper support bar 7. The motor 8 is arranged below the second rod 7c with which the motor 8 is able to cooperate so as to be able to rotate the screw which constitutes the second rod 7c causing its relative translation in sliding with respect to the wheel 7e with which it cooperates.In the event of failure of the electric motor or the battery, it is still possible to manually rotate the wheel 7e to turn the second rod 7c, causing its relative translation in sliding.

[0053] On the figure 6B , the upper part 7a of said other embodiment of the upper support bar 7 is shown, the lower end part 7a2 is able to engage in the cavity of said upper end part 7d the lower part 7b of the figure 6A .

[0054] On the figures 7A et 7B, another embodiment of the second reversible fixing device 7h', 7g' is shown between (1) the lower end portion 7a2 of the upper portion 7a of said other embodiment of the upper support bar 7 and (2) the upper end portion 7d in the form of a cavity of the second rod 7c. The lower end portion 7a2 comprises a hollow annular groove 7g' capable of receiving the end of a locking finger 7h'. The finger 7h' cooperates with an elastic means in an opening in the tubular wall of the cavity 7d so that the finger engages in the groove 7g' when the end portion 7a2 is fully engaged in the cavity 7d. And, by pulling on the finger 7h' it can be removed from the groove 7g' which allows the end portion 7a2 to be removed from the cavity 7d.

Claims

1. Device (1) able to exert a thrust on a door (2) or any other vertical flat surface (3) such as a partition, comprising a lower support bar (4), an intermediate support sole (6) and an upper support bar (7), each of said lower support bar (4) and upper support bar (7) respectively being capable to be actuated in telescopic extension, wherein the device (1) can be dismantled into at least 3 parts (1-1, 1-2,1-3) and comprises a first reversible fastening device (4c-4d) and a second reversible fastening device (7g-7h) that can be manually activated and deactivated, said fastening devices being capable of reversibly fastening the lower parts (4a, 7b) and upper parts (4b,7a) of each of said lower support bar (4) and upper support bar (7), respectively, and able to maintain said lower support bar (4) and upper support bar (7) in rectilinear alignment when they are actuated in said telescopic extension, wherein : - said lower support bar (4) comprises a lower part comprising a jack (4a), said jack comprising a jack body (4-1), the lower end of which is preferably fixed or able to be fixed so as to be articulated in rotation (4r1) on a lower support sole (5), and a first jack rod (4-2), and an upper part (4b) of the lower support bar (4) being fixed or able to be fixed in a rotationally articulated manner (4r2) to said intermediate sole (6), - said upper support bar (7) comprises a lower part (7b) fixed or able to be fixed in a manner articulated in rotation (7r1) to and relative to said intermediate sole (6), and an upper part (7a) of the upper support bar (7) comprising an upper support device (7a1), said upper support bar (7) being able to be actuated in telescopic extension to vary the distance between said lower part (7b) and upper part (7a) of the upper support bar (7), - said first jack rod (4-2) is fixed or able to be fixed in a reversible manner via the first reversible fastening device (4-2c, 4b1, 4c-4d) to said upper part (4b) of the lower support bar (4), the telescopic actuation of said first jack rod (4-2) being able to vary the distance between said jack body (4a1) and said upper part (4b) of the lower support bar (4), said first reversible fastening device (4-2c, 4b1, 4c-4d), when activated, being able to maintain said upper part (4b) of the lower support bar (4) in rectilinear alignment with said first jack rod (4-2) to which it is fixed during the telescopic actuation of said first jack rod, - said upper support bar (7) comprises or cooperates with a second rod (7c) extending at least partly inside (7c1) said upper support bar (7), said second rod (7c) being manually or electrically operable in said telescopic extension to vary said distance between said lower part (7a) and said upper part (7b) of the upper support bar (7), said second rod (7c) being fixed or capable of being fixed in a reversible manner via the second reversible fastening device (7a2, 7d, 7g, 7h) to said upper part (7a) of the upper bar support (7), said second fastening device (7a2, 7d, 7g, 7h) when activated being able to hold said lower part (7a) and said upper part (7b) of the upper bar support (7), fixed to each other in rectilinear alignment with each other during telescopic actuation of said second rod (7c).

2. Device according to claim 1, characterized in that said first fastening device comprises an upper end part (4-2c) of said first jack rod (4a2) able to cooperate with and to be fastened in a reversible manner to a complementary lower end part (4b1) of said upper part (4b) of the lower support bar (4).

3. A thrust device according to claim 2, characterized in that said first fastening device comprises a said upper end portion (4-2c) of said first jack rod (4a2) of male shape, preferably outside said jack body when said first jack rod is in the retracted position, able to engage and be fixed in a reversible manner in a complementary lower end part with a female shape (4b1) such as a first cavity (4b1) of the upper part (4b) of the lower support bar (4).

4. Device according to claim 3, characterized in that said upper end part (4-2c) of the first jack rod (4-2) and said first cavity (4b1) are of complementary cylindrical shapes able to enter into one another for activating said first fastening device and deactivate it under manual control, and with the same length d1 sufficient to maintain said rectilinear alignment, preferably with a smaller diameter than that of said first jack rod.

5. Device according to one of claims 1 to 4, characterized in that said first jack rod comprises two telescopic elements (4-2a, 4-2b).

6. Device according to one of claims 1 to 5 characterized in that said second fastening device (7a2, 7d, 7g, 7h) comprises an upper end part (7d) of said second rod (7c) able to cooperate and be reversibly fixed to a complementary lower end part (7a2) of said upper part (7a) of the upper support bar (7).

7. Device according to claim 6, characterized in that said second fastening device (7d-7g-7h) comprises a said upper end part (7d) of said second rod (7c), preferably with a smaller diameter than that of said second rod (7c), able to engage and be fixed reversibly in a second cavity (7a2) at the lower end of said upper part (7a) of the upper support bar (7).

8. Device according to claim 7, characterized in that said upper end part (7d) of the second rod (7c) and said second cavity (7b1) are of complementary cylindrical shapes able to enter into one another to activate said second fastening device and deactivate it under manual control and with the same length d2 sufficient to maintain said rectilinear alignment.

9. Device according to one of claims 1 to 8, characterized in that said second rod (7c) comprises a thread (7c1) which is able to cooperate with a peripheral wheel (7e) through which said second rod passes, such that the manual rotation of said wheel causes said second rod (7c) to slide relative to said lower part (7b) of the upper support bar (7).

10. Device according to one of claims 3 and 7, characterized in that at least one of said first or second fastening device comprises : a) a first or respectively second transverse locking finger (4c1, 7g1) able to cooperate with a first or respectively second spring (4c2, 7g2) at the bottom of a first or respectively second hollow housing (4c3, 7g3) at the level of said upper end part (4-2c, 7d) of the first or respectively second rod (4-2,7c), said first or second locking finger (4c1, 7g1) being able to retract by compression of said first or respectively second spring (4c2, 7g2) when said first or respectively second rod (4-2, 7c) begins to enter said first or respectively second cavity, and said first or respectively second locking finger (4c1, 7g1) being able to engage in a first or respectively second opening (4d2, 7h2) at the level of the tubular wall of said first or respectively second cavity, by extension of said first or respectively second spring (4c2,7g2) when said end portion (4-2c, 7d) of said first or second rod (4-2, 7c) is completely engaged in said first or second cavity, for activating said first or respectively second reversible fastening device, b) a first or respectively second unlocking pushbutton (4d1, 7h1) disposed inside said first or respectively second opening (4d2, 7h2) at the level of the tubular wall of said first or respectively second cavity, said first or respectively second unlocking pushbutton (4d1,7h1) being able to be manually controlled to push in and retract said first or respectively second transverse locking finger (4c1, 7g1) by compression of said first or respectively second spring (4c2, 7g2) at the bottom of said first or respectively second hollow housing (4c3, 7g3), for deactivating said first or second respectively reversible fastening device.

11. A ready-to-assemble assembly for forming a thrust device according to one of claims 1 to 10, comprising at least 3 independent parts (1-1,1-2,1-3) preferably with substantially the same length comprising : (1) a first part (1-1) comprising said lower part (4a) of the lower support bar comprising said jack of which the jack body (4-1) is preferably fastened or able to be fastened so as to be articulated in rotation (4r1) on said lower support sole (5), said first jack rod (4-2) is in the retracted position in the interior of the jack body, (2) a second part (1-2) comprising : (a) said upper part (4b) of the lower support bar (4) fastened in a manner articulated rotation (4r2) to said intermediate sole (6), and (b) said lower part (7b) of the upper support bar (7) fastened in a manner articulated in rotation (7r1) to said intermediate sole (6), said second rod (7c) being entered at least in part into the interior of (7c1) a tubular end of said lower part (7b) of the upper support bar (7) and (c) said upper part (4b) of the lower support bar (4) and said lower part (7b) of the upper support bar (7) being actuated in rotation relative to said intermediate sole so as to be situated one against the other or facing one another in a substantially parallel manner, and (3) a third part (1-3) comprising said upper part (7a) of the upper support bar (7) preferably comprising a said upper support device (7a1).

12. A method of exerting a thrust of preferably at least 50 kN on a door or any other flat vertical surface (2, 3) based on external support points (8, 2a), wherein a thrust device according to one of claims 1 to 10 is used, characterized in that steps are carried out wherein : a) said lower support bar (4) is disposed with said jack (4a) in the retracted position, preferably inclined by 20 to 35° relative to the vertical, with - said intermediate sole (6) supported on said door or flat vertical surface (2, 3), - said jack (4a) being in the retracted position supported on a lower external support point, preferably the ground (8), preferably via a said lower support sole (5), - said upper support bar (7) being actuated in said telescopic extension to be supported against an upper external support point, preferably a lintel (2a) of the frame of a door (2) or a ceiling or a flat horizontal surface situated above said flat vertical surface, and b) said first movable rod (4-2) of said jack is operated in extension so as to exert a said thrust on said intermediate sole (6).

13. A method according to claim 12, characterized in that the following steps are implemented wherein: - before step a), the assembly between the lower part (4a) and the upper part (4b) of the lower support bar (4) and between the lower part (7b) and the upper part (7a) of the upper support bar (7), is carried out by manually activating said first and second fastening devices before placing said lower support bar (4) and respectively upper support bar (7) in position against the door, and - after step b), said first and second fastening devices are manually deactivated to respectively store said lower part (4a) of the lower support bar and said upper part (7b) of the upper support bar separately.

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