LOADING LIFT DEVICE FOR MOUNTING TO THE CONTAINER OF A TRUCK

Abstract: Loading lift device for mounting to the container (2) of a truck (1), comprising two vertical columns (4) being provided with means for receiving sliders (6) to which a loading platform (7) is pivotably mounted. The columns (4) and sliders (6) are vertically extending formed beams comprising a plate-shaped longitudinal rib (43, 44) and stiffening ribs (38, 40, 45, 48, 50, 51, 52) extending longitudinally. The longitudinal rib extends in longitudinal direction of the container (2) and substantially parallel to its side wall (10) and extends along the accompanying column (4) or slider (6). The surfaces of the longitudinal ribs (43, 44) of column and slider (6) facing each other are provided with engaging sliding members (38, 49). Between parts of the slider (6) and the column (4), a space (9) extending in vertical direction is formed for receiving the means (8) for moving a slider (6) in relation to a column (4) in vertical direction.

Description: Loading lift device for mounting to the container of a truck The invention relates to a loading lift device for mounting to the container of a truck, said device, when seen in its mounted state, comprising two vertical columns atta- ched to the container at both sides of the charging opening or being part of it, said columns being provided with means for slidably receiving sliders to which a loading platform is pivotably fixed, means being provided for moving the sliders, said means being connected to the columns or the container at one side and to the sliders at the other side. With the known loading lift devices there is the diffi¬ culty, that the width of the charging opening of the contai¬ ner is considerably limited by the dimensions of the columns with sliders and the means for moving the latter. Further, manufacture of the known loading lifts is expensive on account of the many parts to be manufactured, to be welded together or to be connected to each other in another way. The object of the invention is to remove these diffi¬ culties and furthermore to limit the weight of the loading lift device. According to the invention, this is achieved, in that at least the slider of the device is represented by an elongated beam extending in vertical direction and compri¬ sing at least one plate-shaped longitudinal rib which, when seen in plan view, extends in longitudinal direction of the container and substantially parallel to the side wall of the container and extends along at least a portion of the accom¬ panying column and which is provided with a laterally moun¬ ted protuberance or excavation extending in longitudinal direction of the beam, which, in cooperation with a protube¬ rance or excavation of the column, establishes the slidable connection between both parts, a space extending in vertical direction for receiving at least part of the means for moving a slider in relation to the accompanying column being formed between the parts of the slider, the column and/or the container. Such an elongated beam, further indicated as a "profi¬ le", can be manufactured in a rather simple way and can be strong enough to accomodate the loads exerted thereon by the loading platform, said profile having a relatively small weight. In particular, it can be provided for that the column too is formed by a profile extending in vertical direction comprising a plate-shaped longitudinal rib being provided with the protuberance or excavation for establishing the slidable connection to the slider, said longitudinal rib extending in a plane coinciding with, or being parallel to, the side wall of the container. In principle, due to this, the side wall of the contai¬ ner will be extended and the loading floor can extend be¬ tween the columns. There is no need for a separate covering plate for covering certain parts of the structure as it is the case with the known devices. The longitudinal rib of the slider or of the column can serve that purpose. In order to give the slider sufficient stiffness in longitudinal direction, it can be provided for that the longitudinal rib of the slider, and possibly that of the column as well, is provided with at least one stiffening rib substantially being square to the longitudinal rib and extending in longitudinal direction of the profile, in which the protuberance and the excavation, together forming the slidable connection, can be achieved by one or more stiffe¬ ning ribs. There, the plate-shaped longitudinal ribs of both profiles can extend parallel to and at a relatively small distance from each other and the stiffening ribs of both profiles can be situated in the space between both longitu¬ dinal ribs and extend up to near the longitudinal rib of the other profile. Owing to this, the total width of a column with slider can be limited. Although there is the possibility of mounting rollers between a column and a slider, in particular it will be provided for, that the protuberance is represented by a single rib onto which one or more strips of plastic are fixed, and the excavation is represented by two L-shaped ribs at some distance from each other together comprising the plastic ribs. There, the sliding surfaces between protuberance and excavation and the points of action for the means for moving the sliders in relation to the columns can be substantially in a plane coinciding with, or being parallel to, the side wall of the container. Due to this, an advantageous trans¬ mission of the occurring forces is achieved. In particular, the profile of the slider and that of the column can be achieved by extrusion from aluminium. Then, the profiles need only be subjected to a few further workings. These further workings could be e.g. the drilling of holes for the bolts by which the profiles are secured to the other parts. The columns can be secured to the rear edges of the container, for example. They can also be part of the end edge of the conatiner and at their upper ends be connected by a top rail and at their lower ends by a part of the floor structure. In particular, the outwardly extending surface of the longitudinal rib of the column or of the slider can be located in the same plane as the outer surface of the con¬ tainer side wall. Then, the loading floor surface can extend across a major part of the width of the profile concerned. Naturally, then the container roof can also continue across a portion of the width of the container so that the container can be closed completely. Then, said closing can take place in that a portion of the container connects to the loading platform folded upwards. If the loading platform in closed condition does not extend across the full length of the container, a closing portion, possibly pivotable, can connect to the upper roof edge. The profile of the column can be provided with a vertically extending edge portion directed backwards in relation to the container, upon which edge portion a sealing strip can be mounted that can cooperate with the loading platform in its folded upward condition, or with a door or the like mounted to the loading platform. The profile of the sliders can extend beyond the edge portion of the column so that a moisture barrier is formed between said edge portion and the loading platform. According to one embodiment it can be provided for, that the longitudinal ribs of the columns are located oppo- site each other and that the longitudinal ribs of the sli- ders are located in the prolongation of the side walls of the container, in which the two vertical spaces for recei¬ ving at least one part of the means for moving the sliders in vertical direction are formed between the stiffening or connecting ribs of the longitudinal ribs of slider and column and a part of the longitudinal rib of the column. The space concerned can then be open to the outside so that the means for moving the slider are easily accessible. Said space can be covered up by a releasable plate being located in the prolongation of the container side wall. Naturally, the space will continue through the container floor so that the sliders can be moved across a considerable height. According to another embodiment, the outer surface of the longitudinal ribs of the columns can connect to the outer surface of the container side walls and the vertical space for receiving the means for moving the slider in relation to the column can be formed between stiffening ribs of the column and of the slider, said space further being limited by a part of the longitudinal rib of the slider. Further, there is the possibility that the column is provided with a second substantially plate-shaped longitudi¬ nal rib at least partly enclosing the slider and having its free vertical end edge provided with a sealing strip that can cooperate with the loading platform in its folded-up condition or with a door or the like closing off the contai¬ ner. The space for receiving the moving means of a slider can be formed by a prolongation of the stiffening rib of the column being located in the plane of the charging opening, the second longitudinal rib of the column, the longitudinal rib of the slider and a stiffening rib connected to it. In this case, the space concerned, as seen in cross- section, is closed off completely to the outside. It is also possible that the space for the moving means is located behind the stiffening rib of the column being situated at the greatest distance from the container and between the longitudinal rib of the slider and a stiffening rib connected to it. Here, the space concerned can be open to the outside and said space can be sealed by a releasable covering plate. The means for moving the sliders in relation to the columns can be represented by pressurized medium-operated cylinders being situated in said spaces. There is also the possibility that tie rods or cables are applied, which extend upwards through the spaces and are led across guiding means to a pressurized medium-operated cylinder or to a winding mechanism. According to preferred embodiment, the loading platform is directly pivotably connected to both sliders, in such a way that both sliders are connected to each other by means of the loading platform. Means for securing the loading platform in certain positions will have been provided between the sliders and the loading platform, and the sliders and the loading plat¬ form will be executed in such a way that in folded-in condi¬ tion of the loading platform, the means are completely received within the sliders. Said means can be in the form of gas springs, for example. Pressurized medium-operated cylinders can be applied as well. The invention is further explained by way of examples shown in the drawing, in which: Figs. 1, 2 and 3 diagrammatically show horizontal sections across a part of the rear edge of a container with a loading lift device according to three different embodi¬ ments of the invention mounted to it; Fig. 4 shows a cross-section according to Fig. 1, but of a modified embodiment; Fig. 5 diagrammatically shows a side view of a slider, a loading platform connected to it and a part of the floor of the container; Fig. 6 shows a view corresponding to Fig. 3, but with the accompanying column and with the slider in another position in relation to the container floor; Fig. 7 diagrammatically shows a side view of a column with slider and parts of the container; and Figs. 8 and 9 show horizontal sections corresponding to Fig. 1, but of modified embodiments. Figs. 1, 2 and 3 show a part of a vehicle 1 being provided with a container 2 to which.a loading lift device 3 is mounted, only part of which being shown. Of the container 2, only the side wall 10 and the floor 28 have been illu¬ strated. The loading lift device comprises the columns 4 connecting to the side walls 10 and along which sliders 6 are movable for moving the loading platform 7 up and down by means of the hoisting mechanism 8. Said hoisting mechanism 8, which can be a pressurized medium-operated cylinder, as indicated in the Figures 1 and 3, or a tie rod or cable as indicated in Fig. 2, is located in the vertical space 9 continuing substantially across the entire height of column 4 and slider 6. When the hoisting mechanism is in the form of belts or cables, these can be wound onto a drum not further indicated and be led across rollers. In the latter case, they can also be connected to a pressurized medium- operated cylinder. The outer surface of the slider 6 can be in the same plane 31 as the outer surface of the side wall 10 of the container 2. Although the space 9 could be closed off by a part of the slider 6, it is preferably provided for, that the space is kept accessible and that it can be closed off by a releasable covering plate 27. As shown in Fig. 1 in particular, the column 4 can have a sliding member comprising a protuberance 42 cooperating with an excavation 49 formed by two ribs 45 wich can act as stiffening ribes for the longitudinal rib 44 of the slider 6 at the same time. The axis of the parts being movable in relation to each other is indicated by 41. The longitudinal rib 44 of the slider 6 is further provided with a stiffening rib 50 also carrying the pivot for the loading platform 7. Fig. 2 shows an embodiment in which the column 4 is formed by a profile comprising the longitudinal rib 43 now carrying the excavation 49 consisting of two ribs 45. The slider 6 is provided with the sliding member 38 represented by the protuberance 42. The longitudinal rib 43 is now provided with the stiffening rib 50. Fig. 3 shows an embodiment in which both the column 4 and the slider 6 are executed as hollow profiles. The vari¬ ous parts present have again been indicated by the same reference numbers as in the Figures 1 and 2. Fig. 4 shows in more detail a section across a part of a loading lift device 3 according to the invention. Parts identical to preceding Figures have been indicated by the same reference numbers and will therefore only be discussed 5 as far as this is relevant. The slider 6 has a longitudinal rib 44 provided with the ribs 45 representing the excavation 49 and cooperating with the sliding member 38 mounted to the longitudinal rib 43 of the column 4. The ribs 45 are provided with the parts 10 36 enclosing the protuberance 42 of the sliding member 38, said protuberance 42 consisting of a U-shaped strip 13 of plastic that has been secured on the part connected to the column 4. The column 4 is further provided with stiffening ribs 51 so that the column can be fixed to the connecting 15 beam 25 between the outer wall 11 and the inner wall 29 of the side wall 10 of the container by means of bolts 46. It is also possible to form the sliding member 38 integrally from one single plastic strip being secured on the longitudinal rib 43 of the column 4. 20 The slider 6 has a space 17 being defined by a substan¬ tially L-shaped stiffening rib 40. The space 17 contains the closing mechanism 47 being connected to the sliding part 19 protruding outwards through the slot 21 and being provided with the pivot for loading platform 7. As appears from Fig. 25 5 in particular, the loading platform 7 is further connected to a suspension member 20. Due to this, the loading platform 7 can be locked in certain positions. Possibly, the suspen¬ sion member 20 is represented by a pressurized medium-opera¬ ted cylinder. 30 The longitudinal rib 43 of the column 4 has an extensi¬ on 30 at its end edge being provided with the sealing strip to which the loading platform 7 connects in its closed position. Thus, the charging opening is defined by the loading floor 28 or its extension 34, by the sealing strips 35 26 and the roof of the container 2. The extension 30 can additionally be provided with a stiffening rib 51. By means of the profile 26, a moisture barrier 37 can be achieved. The longitudinal rib 44 of the slider 6 is provided with an extension 32 for laterally defining the space within 40 which the loading platform 7 is located when in the closed position. At its end, the extension 32 is provided with a stiffening rib 48. The cylinder of a pressurized medium-operated cylinder 8 can be connected to the column 4, the piston rod of said cylinder being connected to the slider 6 by fastening means 23 mounted to it. As mentioned before, the cylinder 8 is located in the vertical space 9 extending downwards through or along, the floor 28 of the container 2. Fig. 5 shows a side view and partial cross-section across a portion of the device, to wit in particular: the loading floor 28, its extension 34, extending between the columns 4, the sliders 6, the loading platform 7 fastened to the sliders, its suspension member 20, and the space 9 in which the hoisting mechanism 8, such as in the form of a pressurized medium-operated cylinder, is situated. Here, the loading platform 7 is located at some distan¬ ce above the loading floor 28 and its extension 34, so that a load can be easily positioned on it or removed from it. Fig. 6 substantially shows the same cross-section als Fig. 5. However, now the loading platform 7 is in a lower position, such as close to the ground, so that a load can be placed on it or be removed from it. Fig. 7 shows substantially again the same cross-section as Fig. 5, but now with the loading platform 7 in the closed position so that it closes off the opening 5 of the contai¬ ner 2. Fig. 8 shows a cross-section corresponding to Fig. 4, but of a slightly modified embodiment. Corresponding parts have been indicated with the same reference numbers. Now, the outer surface of the longitudinal rib 43 of the column 4 is situated in the plane 31 in which the outer surface of the side wall 10 of the container 2 is situated as well. The part 30 of the longitudinal rib 43 carrying the sealing strip 26 now encloses the slider 6. The slider 6 is again slidably connected to the column 4 in the same way as in the previously described embodiment. The space 9 in which the pressurized medium-operated cylinder 8 is situated is now completely closed off, naturally with the exception of its lower end. The embodiment according to Fig. 9 largely corresponds to the one according to Fig. 8. However, here the space 9, in which the pressurized medium-operated cylinder 8 is situated, is mounted behind the column 4, as seen from the container 2. To that end, the longitudinal rib 43 of the column 4 is provided with a stiffening rib 52 to which the cylinder 8 has been fixed. At the other side, the cylinder 8 is again connected to the slider 6 by the connecting means 23 in the known way. Now, the space 9 is accessible from the outside again and can be closed off by the covering plate 27. It will be obvious, that only some possible embodiments of the loading lift device according to the invention have been illustrated in the drawing and described above and that many modifications can be made without leaving the scope of the invention as it is defined in the following claims. - claims -

Claims: C L A I M S 1. Loading lift device for mounting to the container (2) of a truck (1), with said device (3), when seen in its mounted state, comprising two vertical columns (4) attached to the container (2) at both sides of the charging opening (5) or being part of it, said columns (4) being provided with means for slidably receiving sliders (6) to which a loading platform (7) is pivotably fixed, means (8) being provided for moving the sliders, said means being connected to the columns (4) or the container (2) at one side and to the sliders (6) at the other side, characterized in that at least the slider (6) is represented by an elongated beam extending in vertical direction and comprising at least one plate-shaped longitudinal rib (44) which, when seen in plan view, extends in longitudinal direction of the container (2) and substantially parallel to the side wall (10) of the container (2) and extends along at least a portion of the accompanying column (4) and which is provided with a late¬ rally mounted protuberance (42) or excavation (49) extending in longitudinal direction of the beam, which, in cooperation with a protuberance or excavation of the column (4), esta¬ blishes the slidable connection between both parts (4, 6), a space extending in vertical direction for receiving at least part of the means (8) for moving a slider (6) in vertical direction in relation to the accompanying column (4) being formed between parts of the slider (6), the column (4) and/or the container (2). 2. Loading lift device according to claim 1, characte¬ rized in that the ' column (4) is also formed by a profile extending in vertical direction comprising a plate-shaped longitudinal rib (43) being provided with a protuberance (42) or excavation (49) for establishing the slidable con¬ nection to the slider (6), said longitudinal rib (43) exten¬ ding in a plane coinciding with, or being parallel to, the side wall (10) of the container (2). 3. Loading lift device according to claim 1 or 2, characterized in that the longitudinal rib (44) of the slider (6), and possibly the longitudinal rib (43) of the column (4) too, has been provided with at least one stiffe¬ ning rib (45) substantially being square to the longitudinal rib and extending in longitudinal direction of the profile, in which the protuberance (42) and the excavation (49) can be achieved by one or more stiffening ribs. 4. Loading lift device according to claim 2 or 3, characterized in that the plate-shaped longitudinal ribs (43, 44) of both profiles extend parallel to each other and at a relatively small distance from each other and that the stiffening ribs (38, 40, 45, 48, 50, 51, 52) of both profi¬ les are situated in the space between both longitudinal ribs and extend till near the longitudinal rib of the other profile. 5. Loading lift device according to one of the prece¬ ding claims, characterized in that the protuberance (38) is formed by a single rib on which one or more strips (13) of plastic (13) have been secured and the excavation (49) is formed by two spaced-apart L-shaped ribs (45) together enclosing the plastic strips. 6. Loading lift device according to claim 5, characte¬ rized in that the sliding surfaces between protuberance (38) and excavation (49) and points of action for the means for moving the sliders (6) in relation to the columns (4) can be substantially in a plane coinciding with, or being parallel to, the side wall (10) of the container (2). 7. Loading lift device according to one or more of the preceding claims, characterized in that the profiles of column (4) and slider (6) are achieved by extrusion from aluminium. 8. Loading lift device according to one or more of the preceding claims, characterized in that the outwardly exten¬ ding surface of the longitudinal rib (43, 44) of the column (4) or of the slider (6) is located in the same plane (31) as the outer surface of the side wall (10) of the container ( 2 ) . 9. Loading lift device according to one or more of the preceding claims, characterized in that the profile of the column (4) is provided with an edge part (30) extending backwards and vertically in relation to the container (2), upon which a sealing strip (26) has been mounted which can cooperate with the loading platform (7) in its folded-up position, or with a door or the like mounted to the contai¬ ner (2) . 10. Loading lift device according to claim 9, characte¬ rized in that the profile of the sliders (6) extends beyond the edge portion (30) of the column (4) so that a moisture barrier (37) is formed between said edge portion and the loading platform. 11. Loading lift device according to claim 8, characte¬ rized in that the longitudinal ribs (43) of the columns (4) are located opposite each other and that the longitudinal ribs (44) of the sliders (6) are located in the prolongation of the side walls (10) of the container (2), in which the two vertical spaces (9) for receiving at least one part of the means (8) for moving the sliders (6) in vertical direc¬ tion are formed between the stiffening or connecting ribs (51, 45) of the longitudinal ribs (43, 44) of column (4) and slider (6) and a part of the longitudinal rib (43) of the column (4). 12. Loading lift device according to one of the claims 1 - 10, characterized in that the outer surface of the longitudinal ribs (43) of the columns (4) connects to the outer surface of the side walls (10) of the container (2) and that the vertical space (9) for receiving the means (8) for moving the slider (6) in relation to the column (4) are formed between stiffening ribs (51, 52; 40, 32) of the column (4) and of the slider (6), said space (9) further being limited by a part of the longitudinal rib (44) of the slider. 13. Loading lift device according to claim 12, charac¬ terized in that the column (4) is provided with a second substantially plate-shaped longitudinal rib (30) at least partly enclosing the slider (6) and having its free vertical end edge provided with a sealing strip (26) that can coop¬ erate with the loading platform (7) in its folded-up condi¬ tion or with a door or the like closing off the container (2). 14. Loading lift device according to claim 12 or 13, characterized in that the space (9) for receiving the moving means (8) of a slider (6) is formed by an extension of the stiffening rib (51) of the colomn (4), being situated in the plane of the charging opening (5), and the second longitudi¬ nal rib (30) of the column (4) connecting to it, the longi- tudinal rib (44) of the slider (6) and a stiffening rib (40) connected to it. 15. Loading lift device according to claim 12 or 13, characterized in that the space (9) for the moving means (8) is located behind the stiffening rib (52) of the column (4) being situated at the greatest distance to the container (2) and between the longitudinal rib (44) of the slider (6) and an extension (32) connected to it. 16. Loading lift device according to claim 15, charac¬ terized in that the space (9) concerned is open to the outside and can be sealed off by a releasable covering plate (27). 17. Loading lift device according to one of the prece¬ ding claims, characterized in that the means for moving the sliders (6) in relation to the columns (4) are formed by pressurized medium-operated cylinders (8) being located in said spaces (9), or by tie rods or cables extending upwards through the spaces (9) and being led across guiding means to a pressurized medium-operated cylinder or to a winding mechanism. 18. Loading lift device according to one of the prece- ding claims, characterized in that the loading platform (7) is directly pivotably connected to both sliders (6), in such a way that both sliders (6) are connected to each other by means of the loading platform (7).

Inventors: NUYTS HENRI, NUYTS, HENRI
Applicants: BAKKER GILLES EGBERT, NUYTS HENRI, BAKKER, GILLES, EGBERT, NUYTS, HENRI
Application year: 1996
Main classification: B60P1
IPC codes: B60P1