AN APPARATUS IN DEMOUNTABLE BODIES

Abstract: The present invention relates to an apparatus with inwardly and outwardly foldable support legs (39, 45) for a load carrier frame (1) in demountable bodies or the like, the support legs including at least two mutually telescopically shiftable parts (39, 45) in the form of an upper leg and a lowerleg, the load carrier frame (1) being provided with at least one forward and one rear crossbeam (2) each for two sliding beams (15) telescopically shiftable in relation to the crossbeam and each with their bracket (34) for the upper leg (39) and the lower leg (45) telescopically shiftable therein, and the bracket (34) having a guide cam (36, 37) for cooperation with the end of the upper leg (39), a spring (43) being disposed between the bracket (34) and the leg (39, 45) for movably retaining the leg (39, 45) in the bracket (34) in both the folded-in position of the leg (39, 45) and the folded-out, substantially vertical position of the leg (39, 45), the bracket (34) and the upper leg (39) having mutually cooperating locking means (42, 44) for preventing unintentional folding-in of the leg (39, 45) from its folded-out, substantially vertical position.

Description: Invention: An apparatus in demountable bodies The present invention relates to an apparatus with in¬ wardly and outwardly foldable support legs for a load car¬ rier frame in demountable bodies and the like, the support legs including at least two mutually telescopically shift- able parts in the form of an upper leg and a lower leg. Demountable bodies are well-known throughout the entire transportation industry, and the use of demountable bodies makes for extremely rational goods handling. However, desires have been voiced in this art for simplifying the design and construction of prior art support leg arrange¬ ments, with a view to facilitating operation of the sup¬ port legs for the demountable body, and reducing the weight of such constructions without, to that end, fore- going any level of safety and reliability. By a weight re¬ duction, it will, naturally, become possible to increase the permitted payload of the vehicle, which would be a matter of great expediency in the industry. The object forming the basis of the present invention re¬ sides in the task of satisfying the above-outlined desid¬ erata. This task is solved according to the present invention in that the apparatus disclosed by way of introduction is characterized in that the load carrier frame is provided with at least one forward and one rear crossbeam each for two mutually telescopically shiftable sliding beams each with their bracket for the upper leg and the lower leg telescopically insertable therein that the bracket is provided with a giude cam for cooperation with the end of the upper leg; that a spring is disposed between the bracket and the leg for movably retaining the leg in the bracket both in the folded-in position of the leg and in the folded-out position of the leg; and that the bracket and the upper leg are provided with mutually cooperating locking devices for preventing uninentional folding-in of the leg from the folded-out position. Locking devices are disposed at the inner end of the sliding beam for locking thereof in different positions in relation to the cross¬ beam. The locking devices include a locking bar which is manoeuvrable by means of the lever at the opposite end of the sliding beam in relation to the locking devices, and which is spring-biassed towards a projecting position for cooperation with a locking plate in the crossbeam in the retracted position of the sliding beam and the locking plate, and a checkplate in the protracted position of the sliding beam. The locking bar has a recess for locking the locking bar in the retracted position in order to permit complete removal of the sliding beam and, thereby, removal of the leg mounted thereon from the crossbeam and the frame. The spring between the leg bracket and the upper leg is anchored between a shaft on the guide cam in the bracket and a shaft at the upper end of the upper leg, and is provided with a spring portion and a fixed portion, of which the fixed portion limits the maximum extension of the spring and thereby prevents overloading of the spring. The lower leg is insertable in the upper leg with the aid of a spring and is, at its lower end, provided with a footplate which is pivotal about at least one shaft for adaptation to the substrate. A checkbar is disposed on a pivotal handle for switching to and from a position in which the checkbar extends through both the leg bracket wall and the wall of the upper leg and forms an extra saf¬ ety check against unintentional folding-in of the leg. In the upper leg, there is provided a series of mutually al¬ igned holes in two opposing walls, and a first hole A and a second hole B in two opposing walls of the lower leg for cooperation with the holes in the upper leg, the spacing between the holes in the series in the upper leg and the distance between the holes in the lower leg being adapted so as to realise an unbroken series of lengths of the sup¬ port leg formed by the upper leg and the lower leg of as good as twice the length of the series. Employing the present invention will greatly facilitate handling of the support legs in a demountable body. Both folding-in and folding-out of the support legs will be fa¬ cilitated, since the spring retaining the legs in the leg bracket cooperates in both the folding-in and folding-out operation. Moreover, the present invention makes for a considerable weight reduction of the entire construction as compared with prior art constructions, this without ne¬ cessitating any reduction in the safety and reliability aspects. Furthermore, the present invention makes for a high degree of versatility and one and the same con¬ struction can be applied in connection with different corner box arrangements. In addition, the present in¬ vention makes possible removal of the whole of the leg construction proper after but a few minor and extremely simple manual operations. Since the present invention per¬ mits a considerable weight reduction, all adjustments and alterations can be carried out single-handed. The present invention will now be described in greater de¬ tail hereinbelow with particular reference to the accom¬ panying Drawings. Fig. 1 shows a schematic perspective view of a load carrier frame with crossbeams according to one embodiment of the present invention. Fig. 2 shows an end elevation of a crossbeam according to the present in¬ vention. Fig. 3 is a side elevation of a crossbeam ac¬ cording to the present invention. Fig. 4 is a top plan view of a crossbeam according to the present invention. Fig. 5 is a side elevation of a support leg according to the present invention in the folded-out position, the sup¬ port leg being also intimated in the folded-in position. Fig. 6 shows a view in the direction of the arrow VI in Fig. 5 of the support leg and its sliding beam. Fig. 7 shows a view in the same direction as that of Fig. 6 of parts included in the sliding beam. Fig. 8 shows a view from the left in Fig. 7. Fig. 9 shows a front elevation of a locking plate for a crossbeam according to the present invention. Fig. 10 is an end elevation of the locking plate in Fig. 9. Fig. 11 is an end elevation from the right in Fig. 7 of one embodiment with a cast locking bar. Fig. 12 shows a similar view to that of Fig. 11 of one embodiment with a locking bar of separate parts welded together. Fig. 13 is an end elevation of the locking bar in Fig. 12. Fig. 14 is a top plan view of the locking bar of Fig. 12. Fig. 15 is a side elevation of a spring bet- ween the upper leg and the lower leg in an apparatus ac¬ cording to the present invention. Fig. 16 is a top plan view of one end of the spring of Fig. 15. Fig. 17 is a side elevation of a spring between the upper leg and a leg bracket in an apparatus according to the present inven- tion. Fig. 18 is a top plan view of the spring shown in Fig. 17. In Fig. 1, the contours of a load carrier frame 1 are shown by ghosted lines. The load carrier frame 1 has a crossbeam 2 at each end. At each end of the crossbeams 2, there are provided accommodation spaces 3 in the load car¬ rier frame 1. The accommodation spaces 3 serve to accom¬ modate an inwardly folded support leg with retracted lower leg. In most cases, the support legs are, in addition to being pivotal from the vertical position to a horizontal position in the accommodation spaces 3, also at least partly withdrawable out from the crossbeams 2 for achiev¬ ing width and for permitting driving in and out of a ve¬ hicle of the same width as the load carrier frame 1. The crossbeam 2 according to the present invention may be mounted in principle in any optional type of load carrier frame 1 and is shown in greater detail in Figs. 2, 3 and 4. The crossbeam 2 is provided with two longitudinal I- bea s 4 and 5 which are interconnected by means of upper crosspieces 6 and lower crosspieces 7. In order that the crossbeam 2 be able to extend all the way out into the ac¬ commodation space 3, the web 8 of the I-beam 5 is recessed at the ends, and the lower flange 9 is bent up to the web 8 and extends therefrom throughout the entire accommo¬ dation space 3. From the upper side of the flange 9, a crossplate 10 extends up to the upper I-beam 5 and there¬ after across the space between the I-beams 4 and 5 and past the upper flange on the I-beam 4, whereafter the crossplate 10 is recurved at right angles down towards the lower flange of the I-beam 4 and is fixedly welded to a plate 11 extending along the lower flange. A corner box plate 12 is fixedly welded in the opening. The hole 13 in the plate 12 may be of desired type, a so-called standard sling hoist. On the underside of the plate, a vertical plate 14 A is welded for forming one edge of a space bet- ween the I-beams 4 and 5 for a sliding beam 15 in Fig. 6. Between the I-beams 4 and 5, there are disposed a cross¬ plate 7, the crossplate 16 and an additional vertical plate 14 B in line with the vertical plate 14 A co¬ operating for the formation of the space for the sliding beam 15. A locking plate 17 which is shown in greater det¬ ail in Figs. 9 and 10 is fixedly welded to the underside of the inner face of the upper flange on the I beam 5. The locking plate 17 displays on its inner side a guide cam 18 which is disposed in line with a vertical portion 19 on the crossplate 16. This vertical portion 19 is included in the formation of the space for the sliding beam 15 and co¬ operates with the locking plate 17 for locking the sliding beam 15 in the desired, extended position. Naturally, the ends of the crossbeam 2 are of the same construction and the crossbeam 2 is symmetric about the ghosted line shown in Figs. 3 and 4. The sliding beam 15 in Fig. 6 is, at the outer end of the crossbeam 2, guided by the parts 10, 14 A and 19, in the interior of the crossbeam 2 by the parts 7, 14 B, 16 and 19 and is, at the inner end, provided with a locking de- vice which is illustrated in greater detail in Figs. 11- 14. Insertion of the sliding beam 15 is greatly facili¬ tated in that a portion 15 A extending along the beam 15 fits in the space between the upper side of the horizon¬ tally extending portion of the flange 9 and the plate 10, the lower edge of the portion 15 A resting and sliding on the above-mentioned part of the flange 9. The locking device consists of a square tube portion 20 and an inner square tube portion 22 disposed therein for guiding a locking bar 21. On the tube portion 20, there are secured two spring bolts 23 in register with one an¬ other, although only one is shown in Fig. 6. As will be apparent from Fig. 11, the sliding beam 15 is in the form of a recumbent square tube. The locking bar 21 is secured on a lug 24 by means of a bolt 25 which extends through a recess 26 in the locking bar 21. At its one end, the re¬ cess 26 is flared so as to be able to catch on the bolt 25. Approximately centrally, the locking bar 21 is pro¬ vided with a rectangular recess 27 for one end 28 of a rod 29 which is intended for operating the locking bar 21. The locking bar 21 is provided with substantially identical spring bolts 30 as the bolts 23, and springs 31 extend between the bolts 23 and 30. The springs 31 strive to re¬ tain the locking bar 21 in the position illustrated in Fig. 11, in which the tip of the locking bar 21 proper ex¬ tends beyond the locking plate 17 with the guide cam 18. The bar 21 is displaceable from engagement with the lock¬ ing plate 17 by means of the rod 29 which is shown in greater detail in Fig. 7 and which extends through a guide hole in a crosspiece 32 within the beam 15. At its outer, free end, the rod 29 is bent for forming a handle 33 (Fig. 8) . On switching of the handle 33 from the position shown in Fig. 8 counterclockwise, the end 28 will displace the locking bar 21 from the position illustrated in Fig. 11 so that the tip of the bar 21 is free from the locking plate 17 and the end 28 will be retained in an above- centre position by the springs 31, and thereby the locking bar 21 in non-locking position, whereafter the sliding beam 15 may be displaced from its inner position to its outer position, or vice versa. During displacement past the locking plate 17, the locking bar 21 slides on the guide cam 18, which may consist of a bent wire, as is ap¬ parent in Figs. 9 and 10, and which forces the tip of the locking bar 21 upwards, whereby the locking of the locking bar 21 in the non-locking position is released so that the bar 21 projects out between the locking plate 17 and the check plate 19. If it is desired to remove the sliding beam 15 completely, the locking bar 21 may be caught in the flare of the recess 26, whereafter the sliding beam 15 may be displaced into and out of the crossbeam without being impeded by the locking bar 21. The support leg proper is shown in greater detail in Figs. 5 and 6. A leg bracket 34 is mounted on the end of the sliding beam 15, the bracket being U-shaped and open towards the accommodation space 3 and the substrate. The leg bracket 34 has a top or lid 35 with a lower guide cam 36 and an upper guide cam 37. The guide cam 36 consists of two identical parts on either side of the guide cam 37, and a shaft 38 extends between the parts of the guide cam 36. After folding-in, the end of the upper leg 39 of the support leg will rest on the lower guide cam 36 and, on folding-out, the edge of the upper leg 39 will follow the upper guide cam 37 until the upper leg 39 is located in the correct position for contacting against the inside of the top or lid 35. The upper leg 39 is provided with a first shaft 40 and a second shaft 41. A checkplate 42 is disposed on the outer ends of these shafts 40 and 41, on either side of the upper leg 39. A spring 43 extends bet¬ ween the shaft 38 and the shaft 40. The lower edge of the leg bracket 34 is designed for cooperation with the check- Plate 42 and has, at the one end, a locking heel 44 for direct cooperation with the checkplate 42. The checkplate 42 will slide on the locking heel 44 on folding-out and folding-in of the leg, a clearance being thereby created between the upper edge of the upper leg 39 and the guide cam 37. It is clearly apparent from Fig. 5 that the spring 43 draws the upper leg 39 in a direction towards the illus¬ trated position with the locking devices 42, 44 in engage¬ ment with each other. The spring 43 is shown in greater detail in Figs. 17 and 18. A lower leg 45 is inserted in the upper leg 39. The lower leg 45 is provided with a footplate 46 which is pivotal about a shaft 47 which ex¬ tends within the end of the lower leg 45. The footplate 46 is provided with a bracket 48 which extends about the shaft 47 with an interlay of a bushing 49 of suitable ma¬ terial so as to permit a certain pivoting of the footplate 46 about the shaft 47. A long draft spring 50 extends bet¬ ween the bracket 48 and the shaft 41 and strives to hold the lower leg 45 inserted in the upper leg 39. A number of mutually aligned holes 51-55 are provided in the upper leg 39 and the lower leg 45, in which holes a pin 56 is in- sertable for fixing of the position between the upper leg 39 and the lower leg 45. The pin 56 has a handle 57 which is bent over the upper leg 39 for preventing unintentional removal of the pin 56, and which will, by its own weight, assume the position illustrated in Fig. 5 locking against withdrawal of the pin 56. The holes 51-55 and those holes in which the pin 56 is placed are located in the upper leg, and a corresponding lower hole A and corresponding upper hole B in the lower leg 39 naturally serve for re¬ alising a suitable length of the support leg formed by the upper leg 39 and the lower leg 45. These holes make for an unbroken series of support leg lengths of 550 mm if the spacing between the holes is 50 mm. The spring 50 is shown in greater detail in Figs. 15 and 16, while the spring 43 is shown in greater detail in Figs. 17 and 18 and has a spring portion 43 and a fixed portion 58. The fixed por¬ tion 58 is secured to the spring 43 at the one end and ex¬ tends through the spring portion 43 and past its opposing end, whereby the fixed portion 58 will serve as a with¬ drawal or overload limiter. In this way, overloading and fatigue of the spring 43 will largely be prevented. For further securement of the support leg in the position illustrated in Fig. 5, an additional locking pin 59 is provided, this pin extending through the wall of the leg bracket 34 into a hole in the upper leg 39 aligned with the pin, and which is secured on the end of a handle 60 which is pivotal about a shaft 61 at the upper, outer end of the sliding beam 15. Springs 62 are disposed between the shaft 61 and the handle 60 and urge the handle and the pin 59 in a direction towards the locking position illus¬ trated in Fig. 7. A plate 63 is provided for facilitating outward pivoting of the handle 60 and thereby the locking pin 59. The inner end of the locking pin 59 is provided with a bevel 64 for cooperation with the edge of the upper leg 39 on folding thereof to the position illustrated in Fig. 5 for pivoting the locking pin 59 without the need for it to be manually operated in that the handle 60 is grasped and turned with the aid of the plate 63 out from the position illustrated in Fig. 7. Pull-out locks are further provided in the accommodation spaces 3 for cooperation with the handle (upwardly di- rected in Fig. 5) on the footplate 46 for fixedly retain¬ ing the support leg raised to the horizontal position. The bushing 49 which permits pivoting of the footplate 46 about the shaft 47 may consist of any suitable elastomer material, eg adeprene. Furthermore, the spring 43 may pos¬ sibly be substituted by a suitable type of gas spring. The apparatus according to the present invention may be manufactured from aluminium without the need for welding stages, for which reason a leg according to the invention may be of such light weight as 50 kg and even less. Furthermore, the leg bracket 34 is common to several dif¬ ferent types of legs, and the legs are extremely easy to change, since only the spring 43 needs to be unhooked for complete release of the leg from the bracket 34. Other legs can be of any optional design and construction what- ever, as long as the upper portion fits in the bracket 34 and it displays the spring 43, the shafts 40, 41 and the check or dead plate 42 and locking heel 4 . Many additional modifications are naturally conceivable without departing from the spirit and scope of the in¬ ventive concept as defined in the appended Claims.

Claims: CLAIMS 1. An apparatus with inwardly and outwardly foldable sup¬ port legs (39, 45) for a load carrier frame (1) in de¬ mountable bodies and the like, the support legs including at least two mutually telescopically shiftable parts in the form of an upper leg (39) and a lower leg (45), char¬ acterized in that the load carrier frame (1) is provided with at least one forward and one rear crossbeam (2) each for two sliding beams (15) telescopically shiftable in re¬ lation to the crossbeam (2) and each with their bracket (34) for the upper leg (39) and the lower leg (45) tele¬ scopically insertable therein; that the bracket (34) is provided with a guide cam (36, 37) for cooperation with the end of the upper leg (39); that a spring (43) is dis¬ posed between the bracket (34) and the upper leg (39) for movably retaining the leg (39, 45) in the bracket (34), both in the folded-in position of the leg (39, 45) and the folded-out, substantially vertical position of the leg (39, 45); and that the bracket (34) and the upper leg (39) are provided with cooperating locking means (42, 44) for preventing unintentional folding-in of the leg (39, 45) from the folded-out, substantially vertical position. 2. The apparatus as claimed in Claim 1 , characterized in that locking means (17, 18, 21) are disposed at the inner end of the sliding beam (15) for locking thereof in dif¬ ferent positions in relation to the crossbeam (2) . 3. The apparatus as claimed in Claim 2, characterized in that said locking means include a locking bar (21) switch- able by means of a lever (29) at the opposing end of the sliding beam (15) in relation to said locking means, said locking bar being spring-biassed towards a projecting pos¬ ition for cooperation with a locking plate (17) in the crossbeam (2) in the retracted position of the sliding beam (15) and the locking plate (17), and a check plate (16) in the protracted position of the sliding beam (15) . 4. The apparatus as claimed in Claim 3, characterized in that the locking bar (21) has a recess (26) for locking the locking bar (21) in the retracted position so as to permit complete and unimpeded removal of the sliding beam (15) and thereby removal of the leg (39, 45) mounted thereon from the crossbeam (2) and the frame (1). 5. The apparatus as claimed in Claim 1 , characterized in that the spring (43) between the bracket (34) and the up- per leg (39) is secured between a shaft (38) on the guide cam (36) in the bracket (34) and a shaft (40) at the upper end of the upper leg (39) and has a spring portion (43) and a fixed portion (58) which restrict the maximum exten¬ sion of the spring portion (43) and thereby prevent over- loading of the spring. 6. The apparatus as claimed in Claim 1 , characterized in that the lower leg (45) is insertable in the upper leg (39) with the aid of a spring (50) and is, at the lower end, provided with a footplate (46) which is pivotal about at least one shaft (47) for adaptation to the substrate. 7. The apparatus as claimed in Claim 1 , characterized in that a check bar (59) is mounted on a pivotal handle (60) for switching to and from a position in which the check bar (59) extends through both the wall of the leg bracket (34) and the wall of the upper leg (39) and forms an extra precaution against unintentional folding-in of the leg. 8. The apparatus as claimed in Claim 1 , characterized in that a series of mutually aligned holes (51-55) is pro¬ vided in the upper leg (39) in two opposing walls, and a first hole (A) and a second hole (B) in two opposing walls of the lower leg (45) for cooperation with the holes (51- 55) in the upper leg (39); and that the spacing between the holes (51-55) in the series in the upper leg (39) and the distance between the holes in the lower leg (45) are adapted so as to realise an unbroken series of lengths of the support leg formed by the upper leg (39) and the lower leg (45) of almost twice the series length.

Inventors: HENRIKSSON ARNE, HENRIKSSON, ARNE
Applicants: AH UTVECKLING KB
Application year: 1991
Main classification: B60S9
IPC codes: B60S9, B65D90