Device for fast panel fixing and removal

Abstract: A device to secure panels to support bases and, at the same time, make it easier to remove them. A metal cable (4) is connected to the rotatable arms of some plugs or pegs provided with projections, arranged on a panel (2) in correspondence with some sockets secured to the support base (1). The plugs and the sockets have corresponding means to fit together and be separated from each other on operating the cable by moving the rotatable arms of the plugs, so that with a simple movement of the said cable, it is possible to release the said connection and with the insertion of the toothed surfaces of the plug into the sockets, their assembly and securing is achieved.

Description: This invention relates to a device for fast panel fixing and removing, which can be used in any technical field in which it is necessary to arrange closure panels on any kind of supports, either with the aim of closing gaps for decorative effects, for technical reasons, etc., etc. One example of this application, logically with a non-restrictive character, could be the door panels of automobile vehicles, which are situated on the door frame with the purpose of covering the different mechanisms and items that are included in the door, for example window winding mechanisms and others. In this case, as mentioned previously, the door lining panel serves the following purposes: on the one hand, to decorate the inner surface of the door and, on the other hand, ensure that space is allowed for the different technical items, such are armrests, passage for the door opening handle, etc., in the assembly. In general terms, in the conventional assembly of panels of this type, known clips or plugs are usually used, which are housed by pressure in the panel through holes made in it; the clips or plugs protrude from the panel, so that in combination with other auxiliary items of the support base itself, they are connected by pressure between the said auxiliary items and the said clips. The fixing units alluded to in the previous paragraph are known through references FR-A-2668214 and US-A-4422222. These references show conventional assembly units that have the disadvantage that the assembly must be carried out by connecting each auxiliary item of the panel with each plug or peg, in slow operations with certain complications, as the clips often suffer frequent breakages caused by assembling and dismantling the different connections to fit and remove the panel. The invention claims a device whose objective is the automatic assembly and removal of panels on support plates. Another object of the invention is to provide a device that does not suffer frequent breakages, thus providing the appropriate technical security to keep it operational In order to achieve these two basic objectives of the invention, a set of sockets applied on the support base is combined, with some units composed of a support and a plug, combined and connected with a metal cable on the unseen side of the panel. Both items are situated in a variable number, and in mutual correspondence, on the support plate and on the panel respectively. The sockets are positioned with their square portions in square holes cut in the support plate and are units provided with a continuous axial hole. From the square portion a cylindrical portion, which has flexible longitudinal tongues and which is joined to the square area, protrudes towards the interior of the support base. From its free end this cylindrical portion presents a set of evenly distributed longitudinal slots that define a set of fins between them. The ends of these fins are rounded, outwardly convex and turned back towards the centre of the socket. Towards the outer side of the square portion of the socket there is a trunco-conical projection of greater diameter than that of the cylindrical portion and lower in height than it. On housing the socket in the support base, the square hole in the base and the square portion of the said socket will correspond with each other. The protruding tongues on the cylindrical portion fit up againts the inner side of the support base and the trunco-conical projection does the same against the outer side. In combination with these sockets, the rear side of the panel is provided with supports, which have a base area with side fixing holes for bolts to pass through on the panel and an elevation by way of an box open towards one side on the side of the theoretical line between the said holes. The box consists of a hollow interior provided with some protruding straight ribs on its facing transversal sides and another rib on its base, with this latter rib being curvo-concave towards the interior of the said hollow, and with all the ribs being contained in the same horizontal plane. Therefore, the interior of the hollows or gaps is separated into two portions, on one and the other side of the ribs. One of the hollows, the one farthest from the panel, is closed by the outer side of the box, given that this side is provided with a central hole connected with a surface cavity which, starting from the said hole, extends in two directions, forming angles of 45 degrees each with the transversal axis of the base of the support mentioned previously and towards the entry zone to the box. Moreover, from the side of the box which is placed over the panel a curved arm stems outwardly and is approximately coplanary with the plane of the said side, and at the end of this arm is a hollow or cavity open upwardly in a direction that coincides with the theoretical line between the holes. This arm protrudes outside the previously mentioned open hollow, so that it does not interfere with the said opening. The plugs, which have three well differentiated areas, are received in the supports mentioned. One of these areas is cylindrical, with a straitght generatrix, whose diameter coincides with the internal diameter of the sockets and which occupies the greater part of the height of the plug, with its end having a conical finish, above which are determined four protruding longitudinal ribs that occupy a certain length and are separated from each other at angles of 90 degrees. Four tootheed surfaces extend between the ribs in a horizontal direction, so that the said four ribs and these four toothed surfaces correspond in height with those of the slots cut in the sockets, for the operating purposes which will be explained later. At the opposite end of the said straight cylindrical portion, the plug is provided with a protruding perpendicular arm, whose free end is occupied by a rivet, and above this arm and a short distance from it is situated a spiral-shaped body. The spiral in question consists of a body with a rectangular base and low in height, with a protruding convex shape on one of the longer sides. In the surface of this part, three wide slots are made in an approximately helicoidal direction, between which three thin ribs are determined and meet at the geometrical centre of the spiral part. This spiral is of such a nature that by maintaining it controlled by its perimeter, the turning of the arm of the plug in a clockwise direction makes the thin ribs of the said spiral turn and they are contracted by compression in relation to their central point, so that when turning of the arm stops, the initial position of the spiral is recovered, and consequently, the position of the plug. The height of the arm and of the spiral of the plug coincide with the height of the two hollows in the support box, so that the plug becomes housed in this support farthest from the panel and the spiral in the hollow closest to the panel. The cylindrical portion of the plug protrudes through to the outside of the support through the centred hole in the side of the said support farthest from the panel in a perpendicular direction to the said side. The arm of the plug remains at the height of the opening in the side of the support farthest from the panel, and its external portion extends, limited, between the two sides of the opening in this side. In the entry position of the plug into the support box, the arm remains at the side of the opposite opening to that occupied by the support arm itself, in which position the plug is in its rest position, with its spiral area extended. The support and plug units so assembles are fixed to the unseen or rear side of the panel at points that correspond with those of the sockets in the support base, and a metal cable is passed through each unit, which is guided through the end openings of the arms of the support. In these units, it is stressed that the openings in the boxes on the supports must be situated towards the cable, with the cable passing through the ends of the hooks on the arms of the supports, on which the said cable moves freely. The cables also pass through the ends of the arms of the plugs, to which the rivets that they contain are secured to the said cable in succession, so that on moving the cable, the arms move and, with them, the plugs, whose spiral portion is subjected to compression, as well as causing the cylindrical protuberance of the plug to turn. In the assembly, the protruding cylindrical ends of the plug are inserted into the axial hollows of the sockets, with the particularity that the conical ends of the plugs become housed in the internal quasi-conical ends of the sockets. In the initial assembly position, the four ribs of the plug become housed in the longitudinal slots of the sockets, and the four toothed surfaces between the ribs of the plugs receive the end fins of the said sockets, which enter into the internal-dental spaces and succeed in securing the plug to the socket, all of which happens, with the simple insertion of the plug into the socket, and perfectly secures the panel to the support base. In order to remove or dismantle the panel, it is necessary to pull the free end of the metal cable that connects the plugs and the supports, whose other end is secured to the arm of the last plug. On pulling on the cable, therefore, the arms of the plugs turn through an angle of 45 degrees and, with this, the ribs of the plugs move to occupy the positions of the fins in the sockets, opening the corresponding areas and so facilitating the extraction of the panel. Once the panel has been extracted, the action of the spirals of the plugs, which are under stress, return to their initial position after the cable has been released, with which the panel is ready to be attached and fixed to the support base once again. In the assembly, and when it is necessary, for reasons of surface space on the panel, for example, or for other causes, for the cable to turn, some auxiliary centring devices will be provided, on which the cable can perfectly change direction when it becomes necessary. These centring devices are composed, for example, of a cable guide by way of a pulley and a partial side wall that clasps the said pulley in order to prevent the cable from coming off. These centring units, which can have other geometrical designs, can also be provided with cylindrical projections towards the support base, on which the corresponding recesses will be positioned. All these and other details of the invention will be understood with greater clarity with reference to the accompanying sheet of drawings, in which the following are represented, with a non-restrictive nature. Figure 1 is a schematic view that represents a support base and a panel on its unseen side, in which the mechanisms of the invention are included. Figure 2 is an vertical cross sectional elevation of the socket. Figure 3 is a bottom view of the above. Figure 4 is the result of the cross section along the line I-I in Figure 2. Figure 5 is a top plan view of the supports, according to the invention. Figure 6 shows the cross section along the line II-II in Figure 5. Figure 7 is the view from the right of Figure 5. Figure 8 corresponds to the side view of the plug, according to the invention. Figure 9 is a top view of the above. Figure 10 is an enlarged detail of spiral, according to the invention. Figure 11 is the result of the cross section along the line III-III in Figure 8. Figure 12 represents the cross section along the line IV-IV in Figure 8. Figures 13 to 15 show three views of one of the possible centring devices. Looking now at Figure 1, it is possible to appreciate the support base (1) on which the panel (2) is fitted, with the latter shown on the reverse, i.e. unseen, side, so that the mechanisms of the invention can be seen. The different assemblies (3) of support and plug can be observed here, as can the centring devices (5), when necessary, and the cable (4), that runs round the centring devices (5) and is connected to the arms (13, 23) of the support-plug unit. The cable (4) is free at one of its ends, whereas the other end (6) is fixed on the last of the arms of the last plug, as shown. In the normal position, the arm (23) of the plugs is in the situation most distant from the arm (13) of the supports and when the user pulls on the cable, according to the direction (M), the arms (23) turn in unison, freeing the plugs from their contact and fitting in the interior of the sockets (7) and allowing the panel to be extracted. In accordance with Figure 2, we can see the axially hollow socket (7), which is secured to the support base (1) between its upper outer trunco-conical head (8) and the flexible tongues (9). The portion in which these tongues are made, as well as the holes in the support base, are square. In this way, fast assembly and securing of the socket is achieved. The inner end comprises longitudinal open slots (10) and the inclined surfaces (11) between them, whose ends (12) bend towards the axis of the socket, providing an interior (11') which is curvo-concave. The tongues are made out of the same material as the sockets, usually plastic, as illustrated in Figure 4, which shows the cross section along I-I in Figure 2. The supports (3) in Figures 5 and 7 show their side close to the panel (33) provided with holes (15) for fixing to the panel, and on this side the raised box can be observed. The exterior of this box, farthest from the panel, is provided with a central circular hole (18) which extends towards the opening (19, 20) in an angle, situated on the entry side into the box. From the portion on the right of the opening (19, 20) as seen in Figure 5 protrudes the fixed arm (13), whose free end (14) is U-shaped and open upwardly in order to receive the cable (4) so that it can circulate through it. In the interior of the box are two side ribs (17) and a curvo-concave rib (16) on the base, with all three being of the same height, which delimit the spaces or hollows (21, 22) for the spiral (28) and for the arm (23) of the plug, respectively. The plugs shown in Figures 8 and 9 are composed of the cylindrical portion (25) finishing in a conical end, above which the four longitudinal ribs (27) are determined and between them the toothed surfaces (26). The diameter of this cylindrical portion (25) is capable of passing through the upper central hole (18) of the support, in an outwardly vertical direction. The upper arm (23) of this plug is finished by the recess (24) that receives a rivet fixed to the cable (4) and can rotate on its central axis with the cylindrical portion (25) obliging the spiral (28) from one position (23, 24) to another (23', 24') (Figure 9). In the assembly position and rest position, the arm (23) remains on the side (19) of the opening of the support (3), at the other side from the fixed arm (13) and approximately occupies partly the space (22) in the said support (3). The spiral (28) of the plug forms a single part with the plug body and can also be seen enlarged in Figure 10. This part is basically rectangular and low in height, comprising three wide helices or cavities (32, 31, 30), with thin ribs (34, 35, 37) between them that meet in the centre (36), from which the rest of the plug protrudes out. One side (29) of this helix (28) is convex at as shown, so that in the assembly of the plug in the interior of the cavity (21) of the support (3), the shorter sides of the helix remain in contact with the side ribs (17) of the said cavity (21) and the convex side (29) taken in by the front rib (16) of the cavity, thus controlling the exterior of the helix. With the help of these figures, it is seen how the turning of the arm (23) to the position (23') can oblige the thin ribs (34, 35, 37) to bend back by compression in relation to the centre (36) in order to accumulate potential energy that will allow them to return to their original positions by themselves later, once that the action of the user on the cable (4) has stopped. Figures 11 and 12 allow us to appreciate the longitudinal ribs (27) of the plug and the toothed surfaces (26) between the ribs in detail. The ribs (27) and the surfaces occupy alternate, evenly spaced positions all in consonance with the slots (10) and the fins (11) of the socket. Once again in accordance with Figure 1, in the rest position of the cable, and with the conical ends of the plug housed in the central cavity of the sockets, the ribs (27) of the plug become housed in the slots (10) in the socket and the toothed surfaces (26) of the plug are subjected to pressure by the inward ends (12) of the fins (11) of the socket, making it impossible for the cylindrical portion of the plug to come out of the inside of the socket. In this position, as mentioned previously, the arm (23) of the plug is supported on the side (19) of the upper opening in the support. The panel (2) is assembled and cannot be removed. In order to extract or remove the plate, the cable (4) is pulled according to the direction (M) (Fig. 1), so that it slides through the ends (14) of the fixed arms of the support and pulls on the rivets fitted into the end (24) of the arms of the plugs. These turn through an angle of 45 degrees due to this effect, with the ribs (27) and the toothed surfaces (26) doing the same. With this, the relative positions between the plug and the socket are altered. The ribs (27) of the plug act against the end recesses (12) of the fins (11) of the socket and open these fins, making it perfectly possible to pull out the panel and remove it. When the cable is released, the pontential energy accumulated by the helices (28) make the arms (23) of the plug, pulling on the cable, return to their initial position and the plug and socket are once again in position to permit another locking connection. With reference to the centring devices and guide (5) for the cable shown in Figures 13, 14 and 15, we can appreciate the portions (41) by way of pulleys on which the cable (4) can run in order to change direction, partly covered by the guides (42) as well as the protruding centring (40) which will be housed in ad hoc recesses of the support base. The centring devices will correspond with those described or can be made with other different shapes, although it must be well understood that they will be incorporated into the invention when changes in the direction of the cable on the unseen side of the panel become necessary.

Claims: Device for fast panel fixing and removal, with a panel of any kind (2) which is situated on a support base (1) by means of manual pressure connection means, which are forced both for the fixing of the panel and for its removal, consisting of groups of two independent parts which are situated, respectively, in the panel and in the support base and can be operated individually in order to disconnect both items and by applying pressure in order to connect them, whereby: the support base (1) includes a series of sockets (7) which go through square holes cut into it, in which each socket consists of a part with an axial hole along the whole of its length, with a portion with a square cross section that fits into the hole, from which another substantially cylindrical portion provided with longitudinal flexible tongues (9) adjacent to the square portion protrudes towards the interior, with these tongues matching with the inner surface of the support base (1), in that this cylindrical portion has, starting from its free end, a set of open longitudinal slots (10), evenly distributed, which define a set of fins (11) between them, with the ends of these fins being rounded, outwardly convex and turned back towards the centre of the socket, in that on the opposite side of the portion with the square cross section, another trunco-conical portion (8) extends, with a larger diameter than that of the inner portion and lower in height than it, and further comprising : supports (3) fixed to the internal face or surface of the panel, with each support being composed of a part provided with a base portion provided with holes (15) to allow bolts to pass through for fixing to the panel, which is situated on the surface of the panel, in that the portion between holes has an elevation by way of a box open on one side to one side of the line between holes, while from one of the sides of the box begins a curved arm (13), coplanary with the base face of the box, at whose end (14) a hollow or cavity by way of a guide, in a parallel direction to the mentioned theoretical line between holes, in that the face farthest from the panel has a centre circular hole (18) connected to a surface opening (19, 20) which opens out towards the opening in the box with an inclination of 45 degrees towards each side of the centre, in that in the interior of the said box are two internal side ribs (17) and another frontal concave curved rib (16) towards the interior, all of which are at the same height, a plug composed of a longitudinal cylindrical central body (25) finished off at its end by a conical portion, above which evenly distributed ledges or longitudinal ribs (27) are formed, between which toothed surfaces (26) are created, all of which occupies a certain dimension of the central body, in that at the opposite end to the one occupied by the conical portion are situated a protruding perpendicular arm (23), provided at its free end with a transversal recess (24) for the placement of a rivet, with an end spiral (28) being situated above the said arm, with this spiral having a basically rectangular base and being low in height, with a protruding circular shape (29) on one of its longer sides, with the central part of this spiral having some wide spiral slots (30, 31, 32) that occupy the said central space and provide it with flexibility, with these slots being separated by thin ribs (34, 35, 37) that meet in the centre (36), a metal cable (4) which runs through the different units on the inner face of the panel, which it passes through guided by the gaps or cavities in the arms (13) of the different supports and secured to the rivets in the transversal recesses in the arms of the plugs, with one end of the cable being free (M) and the other end (6) secured to the final plug, the supports (3) receive the plugs in their interior, so that the central bodies of the plugs pass through the centred holes (18) in the upper faces or sides of the boxes and their conical ends with ledges (27) and toothed surfaces (26) are housed in the longitudinal holes in the sockets (7), the bases of the arms of the plugs are received in the interior of the boxes, with the ends of the said arms protruding out through the space between the openings at 90 degrees to the sockets, and the spiral is also received in the box, with its shorter sides adjusting to the straight inner ribs (17) in the said box and the longer convex side (29) on the curved frontal rib (16) of the same, the relative movements of the cable (4) make the plugs rotate, and these in turn flex on their lower spirals (28) so that they also make the ends of their central bodies (25) rotate, thus altering the correspondence between the end ribs and toothed areas of the plugs and the slots and fins in the sockets, so that in the rest position for the system, the toothed areas are in correspondence with the fins and in the position when the cable is pulled, the ribs of the plug are in correspondence with the fins in the sockets, the different support and plug units are arranged appropriately on the panel, in correspondence with the positions of the sockets secured to the support base (1), so that the relative positions of the openings in the supports are correspondent with each other in the sense of receiving the cable in the gaps in their arms in the first instance and of later securing the said cable on the ends of the arms of the plugs, finishing on the last of these, in the plug-socket closure position, the arms of the plugs are to be found in their most distant position in relation to the arms of the supports, and in the opening position, closer to them with an angular rotation calculated in terms of the number of fins-slots in the support and of the corresponding toothed areas-ribs on the plug. Device for fast panel fixing and removal, in accordance with claim 1, characterized in that the rotation of the arm of the plug is of 45 degrees and the number of number of fins-slots in the support and toothed areas-ribs on the plug is four. Device for fast panel fixing and removal, in accordance with claim 1, characterized in that in order to ensure the guiding of the cable between the support-plug units, auxiliary guides (5) are arranged, where necessary, for the said cable, with these auxiliary guides also being secured to the panel and, moreover, have some perpendicular, protruding centring device (40) which are housed in other recesses -ad hoc- in the support base. Device for fast panel fixing and removal, in accordance with claim 1, characterized in that the spiral of the plug is configurated in each case so that on being obliged by the cable that operates the arm of the plug, it rotates a certain angle and returns to its initial position thanks to its flexibility in its continent plane controlled in the interior of the support box.

Inventors: GARCIA GARCIA-ARINO JON, MORALES GALLO FRANCISCO, ROMERO MAGARINO ANTONIO, GARCIA GARCIA-ARINO, JON, MORALES GALLO, FRANCISCO, ROMERO MAGARINO, ANTONIO
Applicants: ANTOLIN GRUPO ING SA, GRUPO ANTOLIN-INGENIERIA, S.A.
Application year: 1997
Main classification: F16B5
IPC codes: F16B5, F16B21