SE468003B - DEVICE FOR A FALLABLE WALL FOR FLOOR FLAK - Google Patents

Description

468 003 the sub-platform by hand, so that the threadable sides of the sub-platform lie flat. Since folding in and out does not require a force that exceeds the force of a person, a spring relief works, and this until just before the neutral position, as stated above.

But a spring relief also works on the other side of the neutral position. This is permitted by means of two springs, which are connected to one horn to a boomerang-like switching arm which is pivotable about the third parallelogram link axis. A disadvantage here is the following: a) b) c) d) e) f) You need the switch arm. This is complicated in shape and takes place on the shaft extending in the transverse direction of the vehicle, belonging to the third parallelogram link axle.

In spring force you are limited in that you can not make it adjustable as needed (due to different lever power) and you can not arrange more than two springs.

This means that for heavier fold-down load platform walls, large forces must be applied by hand to swing the platform package past the neutral position. In the event of negligence, there is a greater risk of accidents due to fall-out.

The tension springs interfere with both the recessed and unfolded conditions of the platform and also interfere with certain vehicle constructions, in the area of the rear load edge.

For certain truck constructions, separate recesses must be provided for certain truck constructions so that in the raised condition of the fold-down load bed wall, the platform can also be moved at the height of the vehicle floor.

For these reasons, it is also difficult to affix the registration plate to the truck. Often one can p.g.a. height only use single-row license plates, which, however, p.g.a. the spring does not fit on the width. Square registration plates require a deeper installation of the platform package at the expense of the floor clearance / angle of inclination.

Sometimes you can help to apply the mark in the middle, but this is impossible as the truck has a trailer. 468 003 g) The two switch arms and the two springs carry increased weight.

They not only give increased weight but also this in a place that is significantly behind the vehicle's rear axle and where additional weight is in many cases undesirable.

The object of the invention is to provide a fold-down wall which in a simple manner at least obviates these disadvantages, does not require a different way of thinking for the operating personnel, is practical and requires a minimum of parts.

According to the invention, this is achieved by the characterizing features stated in claim 1.

The invention saves approximately 8-10 kg compared to the prior art. When the springs and breaker arm fall off, the previously occupied place becomes free. You therefore no longer need to make any recesses on the vehicle side. The invention allows a trailer as it does not block the path to the trailer coupling.

When the springs are missing, they cannot corrode either. Both heavy and light-folding load-bearing walls can now be displaced past the neutral position with the same or at least similar application of force, and this during both folding and folding. The double-acting cylinder now in use can be exactly the same size as the single-acting final cylinder used so far. It has only one additional hydraulic connection.

By the features according to claim 2, it is achieved that both hydraulic connections for the cylinder do not move in the longitudinal direction of the cylinder, since the connections can be arranged on the housing. In addition, the center of gravity of the cylinder consisting of piston rod, piston and housing is closer to the vehicle.

By the features according to claim 3, it is achieved that the same cylinder can be used for the most different fold-down walls according to the invention. To the extent that the length between the second and fourth parallel link shafts must be different, the differences are reduced by different lengths of the rod head. In addition, it is better to arrange the projection on a rod head. The piston rod serves i.a. to apply axial forces and seal between the same and the interior of the piston, which results in a special surface quality 46s ° oo5 on the piston rod. Thus, the rod head can be a comparatively coarse part that compensates for different length requirements. In addition, the folding or folding platform strikes the projection when folding back when the platform is folded past the neutral position towards the vehicle. These shocks can then withstand the rod head affected by bending better than the piston rod.

Due to the features according to claim 4, at least friction arises between the underside of the folding platform and the projection.

In addition, the force that the cylinder must provide when lifting the folding platform to just before the neutral position is the smallest possible. When using a roller, the protrusion does not rub against the underside, it remains superficially balanced.

The features according to claim 5 make it possible to place the projection - or when using a roller, the roller - more or less close to the fourth parallelogram link axis, so that independently of the other parameters of the system one can always place the folding platform sufficiently close to the neutral position. You then only need to attach and attach the roller disc in the correct position on the bar head.

The features of claim 6 for the fully extended position of the cylinder provide space for the third parallelogram link shaft.

Of course, these axes are not "axes" in the literal sense, but include the parts required for such a link.

By the features according to claim 7, the angle piece can be designed simply and flat, so that it can easily absorb the pushing and pressing forces acting in its area. In addition, it is not affected by other, unfavorable forces that arise when touched.

By the features of claim 8, the load box wall can be left substantially vertical behind the rear of the truck or trailer. In this condition you can drive without problems. This is very advantageous as the distance is short between two loading and unloading locations and after work has been completed, between these two locations, it is not always desired to lower the load bed wall. Through the cylinder, it is possible to set the platform horizontally at the workplace again and then resume unloading or loading. Of course, the platform must be mechanically locked in this position when traveling, as it is not possible to rely on the presence of a hydraulic pressure which maintains the same. These characteristics make it possible not only to keep the platform at a distance behind the vehicle. In addition, by means of the cylinder and, if applicable, other drive devices present at collapsible load bed walls, the platform can be pressed as a closing wall against the rear edges of the truck structure, so that it is closed from behind.

By the features according to claim 9, it is achieved that when fixing it is not necessary to place the platform in any other position than the fold-out position and then start from this position.

The features of claim 10 provide a particularly simple first locking device which is easy to open and requires virtually no working time.

The features according to claim 11 also keep the second platform in a rigidly extended design relative to the first sub-platform and the entire platform then projects higher up.

The features of claim 12 provide a particularly flat, easily manoeuvrable and required rigidity self-locking device. The invention will be described in more detail below with reference to the accompanying drawings, in which Fig. 1 is a schematic side view of a fold-down wall according to the invention. and precipitation. In this case, certain parts, e.g. the lifting cylinder omitted; Fig. 2 is a detailed partially cut-away side view of the portion of the third and fourth parallelogram link shafts with the cylinder rod fully extended; Fig. 3 is a sectional view taken along line 3-3 of Fig. 2; Fig. 4 is a side view of the rear portion of a truck bed structure and the rear portion of the vehicle chassis at the vertical bed wall 468 003; Fig. 5 is an enlarged view in the direction of the arrow 5 in Fig. 4 with the first locking device; Fig. 6 is a view in the direction of the arrow 6 in Fig. 4 with the second locking device; and Fig. 7 is a side view like Fig. 4 but with the load bed wall lowered.

According to Fig. 1, a first link shaft 11 and a second link shaft 12 are arranged, which run perpendicular to the drawing plane and correspond to the link shafts 31 and 46 in DE patent specification 3,307,857. The parallelogram link device described to the right thereof is not described in more detail here.

The device according to Fig. 1 further has a third link shaft 13 and a fourth link shaft 14. The constructive realization of the link shafts can consist of pin / sleeve joints, roller body bearings or the like.

Between the first and third link shafts 11, 13 extends a lifting arm 16 which is rigid. It does not extend the shortest distance of the connecting line 17 between the link axes 11, 13. In addition, relative to this connecting line it is deflected at an acute angle and has a bottom bend 18 at the bottom left which extends so high that the third link shaft 13 is higher than the upper edge of the lifting arm. 19 in order thus to be better able to support a folding or folding platform 21 in the retracted condition. Between the second link shaft 12 and the fourth link shaft 14 extends a cylinder 22 which with its coupling link 23 arranged at the top right is pivotable about the second link shaft 12. Its housing 24 is coaxial with the connecting line 26 between the second and fourth link shafts 12, 14. The housing 24 has a first connection 27 for a hydraulic pressure line. The hydraulic pressure is conducted via a hole 28 to the top of the piston 29. A second connection 31 is directed downwards and arranged in the lower part of the housing 24. Via a hole 32 the hydraulic pressure can be supplied to a space 33 between the inside of the housing 24 and a piston rod 34. Pressure on the piston 29 via the hole 28 means that the piston rod 34 is moved outwards. Pressure on the ring surface of the piston via the second connection 31 causes the piston rod 34 to move downwards. A lower, sealing sleeve 36 is screwed into the lower left end of the housing 24. The piston rod 34 has on the outside an end surface 38, in which a threaded bottom hole is formed coaxially with the connecting line 26. Therein is a rod head 39 § först êšku¿L @; 5 which first comprises an approx. 30 cm long, circular-cylindrical rod 41 of solid material, which, however, does not have nearly the same surface properties as the piston rod 34. The rod 41 has a diameter of approx. 5 cm and extends coaxially with the connecting line 26. On its left end according to Fig. 2, an angle piece 42 is welded, which has the correct shape shown in Fig. 2.

Perpendicular to the plane of the drawing, the angle piece 42, a total of 40 mm thick, is made of a plate. The angle piece consists of a first piece 43 angled downwards from the connecting line 26, a second piece 44 extending parallel to the connecting line 26 and a third piece 46 extending to the fourth link shaft 14.

The elbow 42 is rigid. Through the construction a indentation 47 arises which is long enough and deep to receive the third link shaft 13 and the link parts arranged around it. The third link shaft 13 always stays a bit above the connecting line 26, since the force of the cylinder 22 can of course not be infinitely large when the piston rod 34 is completely extended.

A holder 48 sits on the rod 41. Its two bearing flanges 49 extend vertically upwards at a distance from each other and hold an approx. 28 mm wide roller 51 of impact-resistant plastic, which is freely rotatable on a shaft 52. A first half-bowl 53 is fixedly connected to the holder 48 and through a second half-bowl 54 supplemented to a clamp, the half-bowls at their edges merging into parallel flanges 56, which can be connected to each other by means of screws 57, so that the roller 51, according to Fig. 3, can be adjusted further to the right or left of the rod 41 and screwed there.

A coupling flange 58 connects the third and fourth link shafts 13, 14 to each other. It consists of an elongated oval construction part. In Figure 1, at the bottom left, it has a stop surface 59 for a measuring stop surface on a first sub-platform 62 of the folding platform 21. Of course, in the vertical direction, the cylinder 22 and the lifting arm 16 lie next to each other.

The first sub-platform 62 can be pivoted about the third link shaft 13 by means of an ordinary link, not shown in more detail, and this according to the arrow 63 from the lifting arm 16 and according to the arrow 64 towards the lifting arm. Arrow 63 indicates the direction of folding. Arrow 64 indicates the inset direction. To the end portion facing away from the third link shaft 13, the beginning of the access road forming 468 003 the second sub-platform 66 is pivotally connected via a coupling link in a manner not shown in more detail. When, after unfolding of the second sub-platform 66 1800, the abutment surfaces 68, 69 abut each other, the insides 69, 71 located parallel opposite each other in a retracted state form a continuous plane, the tip 72 pointing away from the vehicle 73 (fig. 6). The second sub-platform 66 has near the tip 72 an underside 74 which lies in the middle f) of the peripheral surface 76 of the roller 51.

This device operates as follows: In the usual way, a mechanical fuse (not shown) is loosened and the platform package is brought to position A. A pressure is now applied to the first connection 27.

Thereby, the fourth link shaft 14 according to the arrow 77 pivots in a circular sector arc around the third link shaft 13 from the position B via the position C and so on. correspondingly, the connecting line 26 (and associated parts) also pivots clockwise upwards about the second link shaft 12. This movement involves a displacement of the coupling flange 58 around the third link shaft 13 from its slightly vertical position to one towards approx. at 8 directional position. In this case, the roller 51 moves from its position E in an arc to the position F. In the position E its periphery 76 is even further away from the tip 72 than in the position F. The peripheral surface 76 rolls on the underside 74 and thereby the folding platform 21 is brought from its position A to its position G. This position G is located just before the neutral position and the rod 41 is maximally extended. The folding platform 21 is now moved by hand past the neutral position to the position H. The folding platform Z1 pivots in a still set position around the third link shaft 13 until its counter-abutment surface 61 ends up on the abutment surface 59 as shown in the position H. The third link shaft 13 is - as shown in fig. 2 - located at a distance from the connecting line 26.

Now a given pressure is applied to the second connection 31.

The coupling flange 58 now moves counterclockwise to approx. at 6 and this displacement follows the folding platform 21 from its position H to the position I. In this case, other than the shown abutment surface 59 and the counter-abutment surface 61 remain in contact with each other. In it essentially hori-. position, the second sub-platform 66 can now be folded out by hand by turning the coupling link 67 counterclockwise, and - as is normal - can now, by larger or smaller extension of the piston rod 34, the folding platform 29 be adapted to the street level so that its tip 72 lies Right. This procedure is known. 468 003 When folding in, the second sub-platform 66 is first folded back by hand. Then you get a pressure on the first connection 27 and from the starting position, which can be either position around position C or B, the coupling flange 58 and thus also the folding platform 21 moves to position H. Depending on the extension conditions of the vehicle or the slope of the ground to the neutral position approx. 15-300. By hand, the folding platform 21 is now moved from the position H to the position G. The underside 74 then falls down on the peripheral surface 76 of the roller 51. A pressure is now applied to the second connection 31. The piston rod 34 moves further inwards and the roller 51 is displaced from the position F to position E and thereby again reaches position A. By further returning to the piston 29 blocks the roller is released.

In Figs. 4 and 5 of the second exemplary embodiment, the displacement device 78 is recognized from DE patent specification 3,307,857. As before, the link shafts 11, 12, 13 and 14 are present here. Furthermore, the connecting lines 17 and 26 and the roller 51. Fig. 5 shows that e.g. the fourth link shaft 14 is realized by means of a bolt 79 which passes through the end portion of the bend 18 and a complementary recess for this in the coupling flange 58. The abutment surface 59 is also recognizable.

In its center, vertically above the connecting line 26, a loop 81 with a transverse hole 82 projects. In the middle of the counter-abutment surface 61 a recess 83 complementary to the loop 81 is formed. The block 84 facing the abutment surface 61 has a transverse hole which in the condition according to Fig. 5 is in line with the transverse hole 82, so that a securable plug 86 can be inserted through both holes.

Of course, behind the device shown in Fig. 4, the same device is again, which device operates synchronously.

Through the construction thus described, the first sub-platform 62 is rigidly connected to the coupling flange 58, so that it follows the oscillation of the sub-platform.

The second sub-platform 66 is in its position shown in Fig. 4 at the top left by means of at least one flange 87 connected to the first sub-platform 62 in plane therewith. In the lower edge portions of the second sub-platform 66, a pivot bolt 88 projects, which is rigidly connected to the second sub-platform. The bolt goes

Claims (12)

10. 468 003 through a hole in the upper end portion of the flange 87. This runs over a dividing joint 89 between the first sub-platform 62 and the second sub-platform 66. In the lower end portion of the flange 87, according to Fig. 6, a recess 91 open to the left edge is formed. This partially encloses a threaded shaft 92 to a star screw 93, with which the flange 87 can be fixed in the position shown in Fig. 6. On the other side are the insides 69 and 71, which you can walk on. In addition to this second locking device, two stops 94, 96 prevent the second sub-platform 66 from pivoting counterclockwise relative to the first sub-platform 62. The flange 87 therefore only needs to provide the required force for pivoting clockwise from the second sub-platform 66, which force is less than that of the stops 94, 96 must accomplish. Through this first locking device 81, 83, 86 and through the second locking device just described and together with the usual lifting cylinders, not shown, it is possible to achieve the configuration shown in Fig. 4 behind the rear edge of the vehicle: The developed folding platform 21 is secured by the first and second locking devices. Through the lifting cylinder the fold-down wall according to the invention is then moved in a known manner to the position K. As pressure is applied to the first connection 27, the coupling flange 58 comes approximately to its horizontal position or in other words in such a position where the insides 69, 71 are approximately vertical. In position K, the device is mechanically secured with the vehicle 73. This fuse is not shown. The superstructure of the vehicle 73 can be fixedly connected to the same chassis 98 or it can be a standard gearbox construction. One skilled in the art will recognize that in the case of vertically positioned and interlocked sub-platforms 62, 66, it is also possible to use these as rear displacement of the vehicle superstructure. In addition, the displacement device 78 must be moved slightly to the right and lifted slightly higher with the lifting cylinders, so that the folding platform 21 in its developed position can be pressed against the rear edge 97. It is then locked here again by locking devices (not shown). In any case, the folding platform 21 does not always have to be folded down. Claims: G! ll. 468 005 A collapsible wall for a load bed on a vehicle, comprising a main cross member (78) movable in the longitudinal direction of the vehicle; an upper, first parallelogram link shaft (II) on the main cross member (78); a lower second parallelogram link shaft (12) on the main cross member (78); an upper, third parallelogram link shaft (13) on the coupling flange (58); a lower, fourth parallelogram link shaft (14) on the coupling flange (58); a lifting arm (16) between the first and third parallelogram link axes (11, 13); a tilt cylinder (22) between the second and fourth parallelogram link shafts (12, 14); a folding platform (21) comprising at least two sub-platforms (62, 66), the first sub-platform (62) being pivotable about the third link axis (13) over an angle of pivoting which extends from fully retracted position to fully unfolded position; a neutral position of the folding platform (21), where the center of gravity of the platform lies substantially vertically over the third link axle (13) and a lower side (74) of the folding platform (21), which in the recessed position of the platform is above the relative vehicle in longitudinal the direction displaceable part (39) of the tipping cylinder (22); k a n n e t e c k n a d a v that a) the tipping cylinder (22) is a double-acting cylinder; b) in the space between the underside (74) of the recessed folding platform (21) and the longitudinally displaceable part (39) of the tipping cylinder (22), a projection (51) is fixed on the movable part (39), but adjustably in the longitudinal direction; c) the projection (51) is longitudinally displaceable against the underside (74) of the recessed folding platform (21), wherein d) the projection (51) carries the recessed folding platform (21) immediately in front of the neutral position, when the displaceable part (39) on the tilt cylinder (22) is fully extended and the projection (51) is in its position closest to the third parallelogram link shaft (13). Collapsible wall according to claim 1, characterized in that the housing (24) of the tipping cylinder (22) is fixedly linked to the 12,468,003 second link shaft (12). Collapsible wall according to claim 1, characterized in that the movable part (39) is a rod head which is rigid and coaxially connected to the free end (38) of the cylinder piston rod (34). Collapsible wall according to claim 3, characterized in that the projection (51) comprises a roller, the axis of rotation of which extends perpendicular to the longitudinal axis (26) of the rod head (39). A fold-down wall according to claim 4, characterized in that the roller (51) is mounted in a holder (48) which is fastened to the rod head (39) by means of sub-cups (53, 54). Collapsible wall according to claim 1, characterized in that the movable part (39) in front of its fourth parallelogram link shaft (14) has an angle piece (42), in whose recess (47) in the projecting portion of the tipping cylinder (22) the portion of the the third parallelogram link shaft (13) is occupied. Retractable wall according to claim 6, characterized in that the angle piece (42) is open upwards and does not even in the fully extended condition of the movable part (39) touch the portion of the third parallelogram link shaft (13) the angle piece (42) (Fig. 2). ). Retractable wall according to one of the preceding claims, characterized in that the first sub-platform (62) in its position tilted past the neutral position by means of a first locking device (81, 86) is rigidly fixable relative to the third and fourth parallelogram link shafts (13, 14). A fold-down wall according to claim 8, characterized in that in said tipping position the wall is in the fold-out position. A fold-down wall according to claim 8, characterized in that the first locking device is a securable plug device (81, 86), one half (81) of which is fixedly connected to the coupling flange (58) and the second half (86) with the first sub-platform (62). 11. ll. Collapsible wall according to claim 8, characterized in that the second sub-platform (66) in its position developed relative to the first sub-platform (62) is rigidly fixable in relation to the first sub-platform (62) by means of a second locking device (87). Retractable wall according to claim 11, characterized in that the second locking device is a pivot flange (87) which is pivotally attached to a sub-platform (66) substantially parallel to the platform plane, that the pivot flange (87) is removably pivotable at the other end and that the pivot flange (87) bridges the folding link between the first and second sub-platforms (62, 66) and this on the non-walkable side.