HUP0302064A2 - Pallet container - Google Patents

Abstract

The subject of the invention is a pallet container with a thin-walled, rigid inner container made of thermoplastic, for the storage and transport of liquid or bulk material, with a tubular grid frame surrounding the inner plastic container as a support jacket and a bottom plate on which the inner plastic container rests and with which the support jacket is firmly connected, where the tubular grid frame is also consists of horizontal and vertical pipe rods welded together at intersections. The essence of the invention is that the tubular bars have a closed tubular profile (18a) with a trapezoidal cross-section, a longer and a shorter, parallel wall and two straight walls running diagonally towards each other, which, starting from the longer of the two parallel walls, are connected to the shorter wall running diagonally towards each other, and the tubular profile ( 18a) apex angle closed by two inclined walls is 20-45°, preferably about 36°. HE

Description

£0301364

PALLET TANK

The invention relates to a pallet container with a thin-walled rigid upper container made of thermoplastic plastic for the storage and transport of liquid or bulk materials, with a tubular grid frame surrounding an inner plastic container as a supporting shell and a bottom plate on which the inner plastic container rests and to which the supporting shell is firmly connected, where the grid frame consists of vertical and horizontal tubular bars welded together at the intersections.

Such a pallet container - which has a support shell consisting of a welded tubular lattice frame - is known, for example, from the patent specification EP 0 734 967. The tubular lattice support shell of the known pallet container consists of round profile tubes which are strongly compressed at the welded intersections. Another pallet container is known from the patent specification DE 297 19 830 U1, the grid rods of which have a tube profile other than a round cross-section, where the tube rods have the same cross-section along their entire length and do not have a changed, for example reduced cross-section anywhere. A further pallet container is known from the patent specification DE 196 42 242 A, which consists of open profile rods. Here, there are laterally outwardly flattened surfaces in the intersection regions where the rods are welded together. The open profile bars have a relatively low torsional stiffness and, due to their thin, relatively sharp edges, these pallet containers can be moved very unfavourably by hand. Furthermore, various pallet containers are known in which the lattice bars have a square cross-section.

The grid cladding is usually fixed to the bottom plate by means of a frame bar running horizontally around the bottom or a holding fastening device, such as a screw, hook, etc. The fastening devices are either on the top plate or on the

98023-7245 WE/Tz

- 2 T are riveted, screwed or welded to the upper outer edge of the pallet.

For the industrial use of pallet containers, for example in the chemical industry, they need to be officially approved and must meet various quality requirements. For example, their internal pressure resistance must be determined, and filled containers must be dropped from a certain height. The so-called IBC containers (Intermediate Bulk Container) are used for the transport of liquids in a volume of 1000 liters, for example. In particular, when transporting filled IBC containers by truck, the shocks and movements that occur during transport, especially when driving on rough roads, cause the liquid in the container to move, and internal pressure shocks are generated on the wall of the inner container. These shocks are then transmitted from the wall of the inner container to the pipe grid and cause vibrations there, i.e. a dynamic, sustained vibration load is generated on the pipes forming the grid. In the event of prolonged driving on bad roads, this stress can be so great that signs of fatigue appear on the tube grid, which endangers their static strength. Therefore, such pallet containers are not suitable for export to the USA or for repeated use.

In the solution known from the above-mentioned patent specification EP 0 734 967, the round tube profile of the horizontal and vertical lattice bars is significantly deformed laterally towards the welding points at the crossing points, and thus their resistance to all forces is significantly reduced compared to other places of the tube bars. In addition, the round tube profile is deformed and weakened even more deeply in the deformation area directly at the welding points, while during welding a material hardening also occurs in the pressed tube profile area.

The object of the invention is to eliminate the listed shortcomings and to provide a pallet container which has greater transport strength and in which the resistance of the grid shell can be increased by simple structural means and thus can be subjected to greater transport loads, even in the case of long-term transport. On the one hand, it must be ensured that the pallet container can also transport hazardous liquids or bulk materials, meeting all kinds of requirements. For normal transport loads, it must be ensured that the grid shell can be implemented with relatively fewer vertical and/or horizontal grid bars without reducing the mechanical load capacity.

According to the invention, the object is achieved by providing a closed tube profile with a trapezoidal cross-section of the tube bars, which has a longer and a shorter wall parallel to each other and two straight walls running obliquely towards each other, which start from the longer of the two parallel walls and connect to the shorter wall running obliquely towards each other, and the apex angle enclosed by the two inclined walls of the tube profile is 20-45°, preferably 36°. The closed, trapezoidal tube profile has a high bending resistance moment and, due to the side walls running obliquely towards each other, a high torsional resistance. This can be ensured in particular if the height-width ratio H/B of the trapezoidal tube profile is 0.8 -1.0, preferably 0.86. Thanks to the design according to the invention, the pallet container can be implemented with five horizontal grid bars instead of the previous six for normal transport requirements without the slightest reduction in mechanical load capacity.

In a preferred embodiment of the invention, the longer parallel wall of the trapezoidal pipe profile at the intersection of two pipe rods is shaped inwardly - namely in a length equal to two pipe widths - so that a rounding facing outwards is always formed on the two outer longitudinal edges so that there are always four contact points at the intersection of the horizontal and vertical pipe rods, which are firmly connected by welding, where at the intersection of each pipe rod the opposite parallel walls

- Even when welded together, they are located at a distance from each other, without contact.

In a further preferred embodiment of the invention, the longer parallel wall of the trapezoidal pipe profile is shaped inwards over the entire pipe length in such a way that there is an outwardly directed rounding on the two outer longitudinal edges, and thus there are four contact points at the intersections of the horizontal and vertical pipe rods, at which they are firmly connected to each other by welding, where the opposite parallel walls at the intersection of each pipe rod are arranged at a distance from each other, even when welded together, without contact. It is also possible to have the longer parallel wall of the trapezoidal pipe profile in one pipe rod shaped inwards only in the region of the intersection, and the longer parallel wall of the pipe profile in the other pipe rod shaped inwards over the entire pipe length. This is a completely satisfactory solution for a relatively medium load.

The profiling and shaping of the longer parallel wall in the case of a pallet container - where the profile tube is 1 mm thick - the shaping depth A is also 1 mm, when after welding the intersecting grid rods fuse into each other to a depth of about 1 mm. Here too, however, it is ensured that the parallel walls at the tube intersection are still about 1 mm apart after welding and thus do not touch each other. This is important because the pallet container often has to be stored outdoors and is exposed to weather effects. By keeping the grid rods at a distance, rainwater can dry out quickly, and rusting and corrosion are thus prevented. In fact, inevitable rust pockets would form on the welded surfaces that lie on top of each other, which would cause rapid rusting in a short time.

In a further preferred embodiment of the invention, the trapezoidal tube profile has at least one side of the longer parallel wall, spaced laterally from the

- 5 has a shaping arranged next to the welding point. This shaping causes a reduction in the height H of the pipe profile and, in the case of dynamic vibration loads, ensures that the sensitive welding points are relieved from the critical peak values resulting from the changing bending loads. Furthermore, according to the invention, the trapezoidal pipe profile has a shaping on each side next to the welding point, the distance from the welding point being 1/10 of the pipe profile width B. In this way, the critical stress peaks in the case of dynamic vibration loads are removed from the welding point, namely to an area adjacent thereto. Due to the special design of the pipe profile, significant relief can be achieved at the welded joints with shapings that reduce the stress peaks, even under static and/or dynamic loads. The welding points are not arranged in a deformation area and thus retain their high bending stiffness. The invention is special in that it has a pipe profile which, in contrast to known pipe profiles, is not locally impressed at the welding point, but rather next to the welding points, at a distance from them, which reduces the static and/or dynamic load acting on the welding point or on the grid bar at the welding point. The trapezoidal pipe profile is designed in such a way that it can be easily deformed without significant material displacement. The pipe bars are only shaped at precisely defined points and vibration relief is provided at the welded intersections. When welded together with a second pipe, the pipe stiffens at the welding point, and it is precisely at this welding point that it is most sensitive to vibration loads.

A non-negligible vibration load, for example during a long transport by a vehicle on a bad road, can cause the tubes of the pallet container to break at the welding point in a shorter time. In the case of the lattice tube support jacket according to the invention, the forced vibration points are not directly

- 6 occurs at or near the welding points, but at least at a small distance therefrom. The so-called forced oscillation points created by these machining operations are in each case designed for less than 50% of the pipe cross-section. They are in the range of 10-45% of the pipe cross-section, preferably in the range of 33%. As a result, the bending stiffness of the formed pipe cross-section is reduced only very slightly, and material fatigue is almost eliminated.

The invention is described in detail with reference to exemplary embodiments based on the drawings, where the

Figure 1 is a front view of an embodiment of the pallet container according to the invention,

Figure 2 is a side view of a pallet container, the

Figure 3 is a larger scale detail drawing of a trapezoidal profile of the pallet container according to the invention at a pipe intersection, the

Figure 4 is a further larger-scale detailed drawing of the trapezoidal pipe profile according to the invention, also at a pipe intersection,

Figure 5 illustrates the hydrodynamic pressure effect exerted by a liquid material acting on the side wall of a container in a schematic cross-section, the

Figure 6 shows a horizontal section at the location of the largest lattice deflection, the

Figure 7 shows a pipe intersection with a larger scale design,

Figure 8 shows a trapezoidal pipe cross-section in the direction of arrow D in Figure 7,

Figure 9a illustrates a shaping of the trapezoidal pipe cross-section on its narrow side, while the

Figure 9b shows a design of a trapezoidal pipe cross-section on the wide side,

Figure 10 shows a square tube profile in an unloaded state,

Figure 11 illustrates the square tube profile of Figure 10 in an overloaded condition,

Figure 12 illustrates the pipe profile according to the invention in an unloaded state,

Figure 13 shows the pipe profile according to Figure 12 in a loaded state,

Figure 14 shows another pipe profile according to the invention,

Figure 15 also illustrates another pipe profile variant, and finally the

Figure 16 is a view of the pipe profile part according to the invention at the location of a corner bend.

Figure 1 shows a pallet container 10 according to the invention, which has a thin-walled, blow-molded, rigid inner container 12 made of thermoplastic material and has an upper filling opening, and a tube frame 14 surrounding the inner container 12, which is firmly but releasably connected to a replaceable bottom plate 16. The front view shown in the figure shows the narrow side of the pallet container 10, with the discharge valve near the bottom on the inner container 12. The lower front edge of the bottom plate 16, in the case of the walls shown in the figure, with the discharge valve 18a arranged above it, forms the most sensitive part of the pallet container, which is subjected to the highest load and diagonal drop during testing. The places marked with dotted circles illustrate the special design locations of the tube frame with moldings (see also Figure 7). When developing the pallet container according to the invention, it was subjected to five different known tests, namely internal pressure test, drop test, swing test, compression test and palletization. In the experiments and tests simulating long, rough road transport of the known solutions, particularly weak points were revealed in the case of the known pallet containers, especially in their frame.

Figure 2 illustrates a pallet container 10, which also

- 8 was subjected to permanent loads, and here we have marked with circles those places in the truss frame where so-called weak points first appeared after prolonged, dynamic swinging loads.

Figure 3 shows an intersection region of a closed tube profile 18 according to the invention, where the tube profile is trapezoidal and consists of a longer and a shorter parallel wall 20, 22 and two walls 24 running obliquely towards each other, which walls 24 run obliquely towards each other starting from the longer parallel wall 22 and connect to the shorter parallel wall 20, and these walls 24 running towards each other have an apex angle 26 of 20-45°, preferably 36°. The height/width ratio of the trapezoidal tube profile is approximately 0.8-1.0, preferably 0.86. Due to the relatively high height of the trapezoidal profile, a sufficiently high bending stiffness can be achieved, and due to the closed compact design, a better torsional stiffness can be achieved in the case of lattice rods, i.e. tubes of a truss frame. This provides a significantly better result than in the case of round tubes or open profile tubes. The intersections of the extended lines of the walls 24 running obliquely towards each other at the apex angle 26 - measured from the shorter parallel wall 20 - are approximately 2H, where H is the profile height between the shorter 20 and the longer 22 walls. The distance of the apex of the apex angle from the shorter parallel wall 20 can therefore be 0.75 - 2.5H.

A preferably selected trapezoidal profile 18 is illustrated in Fig. 4. In a simple embodiment, the longer parallel walls 22 are only partially formed inward at the intersection, so that only there are the outwardly directed roundings 28 on the outer longitudinal edges. In this way, there are four contact points at the intersections - where a vertical and a horizontal crossbar meet. At these points, the intersecting bars are then firmly welded together, and the parallel walls 22 of the two intersecting crossbars are spaced apart at a certain distance from each other between the contact points.

- 9 In a particularly advantageous embodiment, the longer parallel walls 22 are formed inwardly along the entire length of the grid bar and there are protruding roundings 28 on the outer longitudinal edges. The trapezoidal profile 18 formed through it showed excellent properties in the prototype implemented and is produced from a round tube with a diameter of 18 mm. The depth of the forming in this longitudinal profiling is approximately twice the wall thickness of the profile tube. In one embodiment, the wall thickness of the profile tube of the pallet container is 1 mm, and the depth of the forming is determined accordingly. The welding of the tube bars is carried out at all intersections at the contact points by electric resistance welding. By means of the four-point welding, the intersecting grid bars are compressed by approximately 1 mm, and it is thus ensured that the parallel walls 22 lying opposite each other are 0.5-2.0 mm, preferably 1.0 mm, apart from each other even after welding during shrinkage, i.e. a distance of this size remains between them and therefore they do not touch. This is particularly important because the pallet container is often stored outdoors and is exposed to the weather. The distance between the parallel walls ensures air passage and rapid drying, as a result of which rust does not form, i.e. rusting is thus eliminated. The welding surfaces lying on top of each other inevitably form rust nests, which could cause rapid rusting in a short time. It can also be seen from this cross-sectional view that the width B1 of the wall 22 remaining between the outwardly facing roundings 28 is approximately the same as the width of the shorter parallel wall 20.

The schematic drawing in Figure 5 shows the varying deformation deflection of the lattice frame under dynamic vibration loading. The hydrostatic internal pressure - caused by the liquid filling - is indicated on the right-hand side of the figure. This hydrostatic internal pressure causes the maximum deflection of the lattice.

- 10 frame deflection Da and deflection Di at approximately the height of the filling center of gravity, i.e. 33% of the height of the frame of the hopper, and that the amplitude of the oscillation outward at this height is approximately twice the amplitude inward. This is the reason why the risk of breakage and tearing due to oscillation loads is greatest in the lower region of the frame of the hopper. The schematic part according to Figure 6 is a representation of the horizontal cross section illustrated at the location of the maximum deformation Da. The oscillation deflection outward is unimpeded, while the liquid column and the opposite side walls counteract the inward deflection. The lower circumferential horizontal pipe rods 30 are subjected to high bending loads, especially near the corner arches 38.

Figure 7 shows an internal view of a truss frame, namely at the intersection of a horizontal tube 30 and a vertical tube 32. At the intersection 36, the four welding points are marked with small black dots. In addition, the trapezoidal tube profile of the tube 30, like the tube profile of the tube 32, is provided with a shaping 34 on both sides of the intersection 36, while the shapings 34 are located at a distance of 1/10 of the tube profile width B from the intersection 36. Figure 8 shows a view D of the undeformed part of the trapezoidal tube profile 18, and a section of the shaping 34 along the line C-C is shown in Figure 9b. The formations 34 can be formed on the profile tube on the sides of the longer parallel walls 22 (see Fig. 9b) and/or on the sides of the shorter parallel walls lying on the eye (see Fig. 9a). This makes several variants possible, but at least two formations must be formed on the outer side and/or inner side of the trapezoidal profile. In all variants, however, it is important that the tube profile is formed not at the intersection, but next to it.

In addition, it is advisable to reduce the depth T of the shaping 34, i.e. to keep it at 15-50% of the profile height H. In a preferred embodiment, T ··

- The depth of the recess 11 is 33% of the profile height H. In addition, the longitudinal dimension of the recess 34 may be from 1.5 to 3 times the profile width B, preferably 2 times the profile width B.

Figure 10 shows an unloaded tube profile with a square cross-section and a constant shape over the entire length of the tube. Here, after a comparatively short dynamic vibration load, a crack appears in the horizontal 30' tube rod directly at the intersection at the welding point, as can be seen in Figure 11.

A crack or a truss rod breaking occurs at the point of greatest tensile stress, i.e. at the point of greatest bending of the truss shell. The vertical profile tubes are arranged on the inside and the horizontal profile tubes are arranged on the outside of the truss frame, i.e. the tube shell. The rupture and breakage points always occur in the intersection area, directly next to the welding points. The rupture always starts from the outside with the vertical rods and moves inwards, while with the horizontal rods it always starts from the inside and continues outwards. Comparative tests have shown that the truss frame, which consists of profile rods with open, outwardly bent flat flange edges, has good stackability despite the relatively far apart welding points, but an unfavourable vibration load capacity.

In comparison with the square tube profile shown, FIG. 12 shows a closed trapezoidal profile 18 according to the invention with two formations 34 on the horizontal tube 30. As can be seen from FIG. 13, the tube is free from tearing and breakage even after a sustained oscillating load. This is based on the fact that the intersection region is free from weakening formations at the welding points and is therefore very stable, while the formations 34 that reduce the bending resistance pressure act as so-called bending corners and are arranged at least at a short distance from the intersection region,

- 12 and the peak stresses are kept away from the welding points. The particular problem in the construction of the tubular frame is that on the one hand the vertical and/or horizontal profile bars must be stable and rigid, have high bending resistance in order to prevent unnecessary buckling of the pallet container in the event of high internal pressure, and must also be rigid with high bending resistance moments, and on the other hand their oscillation flexibility must be ensured against dynamic permanent oscillation loads, although these requirements are contradictory. It is also a requirement that the production costs should be relatively low, and thus an optimal fulfillment of these requirements must be found. Known pallet containers are generally manufactured with a continuous, uniform tube profile, as described in the patent specification DE 297 19 830 U1. In the previous solutions, it was not recognized that the bending stiffness and the vibration elasticity are inversely related to the lattice tube frames of pallet containers under transport loads. In the trapezoidal profile according to the invention, the depth T of the shaping 34 is 25-50% of the height H of the tube profile, preferably 33%. A shaping with a value of H of 5 mm, i.e. 33%, is sufficient for a tube with a height of 15 mm, and thus the vibration load at the welding points is kept low or away from it, and adequate tube rigidity is ensured at the same time. This is important so that the vibration amplitude at the lattice can be kept as low as possible.

Figure 14 shows a variant with two mouldings 34 on the side of the profile tube opposite the welding points, i.e. on the side opposite the shorter parallel wall 20. Figure 15 shows a particularly advantageous variant. Here, the trapezoidal tube profile 18 is provided with mouldings 34 on the side of the shorter parallel wall 20 and on the side of the longer parallel wall 22 at a crossing point 36, such that these mouldings 34 lie exactly opposite each other. These mouldings are also provided on the side of the tube B

- 13 are at a distance of at least 1/10 of the profile width from the intersection point 36. If the formations 34 are formed on the two parallel longer and shorter walls 20, 22, then this hinge effect particularly strengthens the flexibility of the pipe profile at this point.

According to the invention, the formations 34 in the tubular bars 30, 32 can be formed in different regions of the tubular frame 14 and/or in different depths and/or in different locations in the horizontal and vertical tubular bars 30, 32, depending on the intensity of the expected dynamic vibration loads. By means of these measures, a permanent bending stiffness that largely meets the requirements and needs can be achieved, as well as optimal vibration flexibility, for example in the longer side walls or in the shorter front or rear walls in the case of the pallet container according to the invention.

A further important design for eliminating harmful effects is shown in FIG. 16. Here, the effect of dynamic vibration loads is reduced in the horizontal lattice bars. Here, the horizontal tubes 30 of the tube frame 14 can be designed to be flattened in the vertical direction parallel to the corner arc 38 bent at 90° and also form a hinge-like bending joint. The horizontal tubes do not have to have high bending resistance moments in the corner region, i.e. perpendicular to the vertical direction, but rather a greater flexibility is required here. Particularly good test results were achieved with the pallet container in which the horizontal tubes 30 are bent at 90° in the corner regions of the tube frame 14, where the profile tube 18 is designed to be flattened on the inside and/or outside at a height of at least 1/4 H of the cross section. In a favorable design, the horizontal tubes of the truss frame are flattened by 30% on the inside in the lower region and 45% on the outside, while the flattening is gradually reduced in the upper region.

Of course, the versions described have many similarities with each other.

- They can be varied in 14 ways and all combinations fall within the scope of the invention.

The options described above allow for various settings, particularly in the lower half of the tube grid shell, with appropriate measures, i.e. to ensure adequate, satisfactory bending stiffness, with an optimized tube bar flexibility adapted to it.

Claims (16)

PATENT CLAIMS 1. Pallet container with a thin-walled, rigid inner container made of thermoplastic plastic, for storing and transporting liquid or bulk materials, with a tube frame surrounding the inner plastic container as a supporting shell and a bottom plate, on which the inner plastic container rests and with which the supporting shell is firmly connected, wherein the tube frame consists of horizontal and vertical tubes welded together at the intersections, characterized in that the tubes (30, 32) have a closed tube profile (18a) with a trapezoidal cross-section, a longer and a shorter, parallel wall (20, 22) and two straight walls (24) running obliquely towards each other, which start from the longer of the two parallel walls (22) and connect to the shorter wall (20) running obliquely towards each other, and the two inclined walls of the tube profile (18a) The apex angle (26) enclosed by (24) is 20-45°, preferably about 36°. 2. Pallet container according to claim 1, characterized in that the height/width ratio (H/B) of the trapezoidal tube profile (18) is 0.8-1.0, preferably 0.86. 3. Pallet container according to claim 1 or 2, characterized in that the longer parallel wall (22) of the trapezoidal tube profile (18) is shaped inward at the intersection of two tube bars (30, 32) in such a way that an outwardly directed rounding (28) (flaring) is always formed on the two outer longitudinal edges, so that at the intersections (36) of the horizontal and vertical tube bars (30, 32) there are always four contact points, which are firmly connected by welding, where at the intersection (36) of each tube bar the opposite parallel walls (22) are arranged at a distance from each other without contact, even in the welded state. 4. Pallet container according to claim 1 or 2, characterized in that the longer parallel wall (22) of the trapezoidal tubular profile (18) is - 16 is shaped inwardly over the entire length of the tube in such a way that there is an outwardly directed rounding (28) on the two outer longitudinal edges, and thus there are four contact points at the intersections (36) of the horizontal and vertical tube rods (30, 32), which are firmly connected to each other by welding, where at the intersection (36) of each tube rod the opposite parallel walls (22) are arranged at a distance from each other without contact even when welded together. 5. Pallet container according to claim 3 or 4, characterized in that in one of the tube bars (30, 32) the longer parallel wall (22) of the trapezoidal tube profile (18) is formed inwardly in the region of the intersection (36), and in the other tube bar (32, 30) the longer parallel wall (22) of the tube profile (18) is formed inwardly over the entire tube length. 6. Pallet container according to any one of claims 1-5, characterized in that the distance (A) between the two longer parallel walls (22) of the intersecting tube bars (30, 32) is approximately 0.5-2 mm, preferably 1 mm. 7. Pallet container according to any one of claims 1-6, characterized in that the width (Bi) of the part of the longer parallel wall (22) remaining between two roundings (28) is approximately equal to the width of the opposite shorter parallel wall (20). 8. Pallet container according to any one of claims 1-7, characterized in that the trapezoidal tube profile (18) has a shaping (34) arranged at least at a distance laterally next to the welding location on the side of the longer parallel wall (22). 9. Pallet container according to any one of claims 1-8, characterized in that the trapezoidal tube profile (18) always has a shaping (34) next to a welding location, and the distance between them is 1/10 of the tube profile width (B). 10. A pallet container according to any one of claims 1-9, characterized in that - 17 fields, that between two intersections (36) on the side of the shorter parallel wall (20), i.e. on the back side of the welding locations, there are at least two shapings (34) and/or on the side of the longer parallel wall, i.e. on the side of the welding locations, there are at least two shapings (34). 11. Pallet container according to any one of claims 1-10, characterized in that the depth (T) of the shaping (34) is 15-50%, preferably 33%, of the profile height (H) by reducing the profile height (H). 12. Pallet container according to any one of claims 1-11, characterized in that the longitudinal dimension of the bar of the shaping (34) is 1.5-3 times, preferably 2 times, the profile width (B). 13. Pallet container according to any one of claims 1-12, characterized in that the trapezoidal tube profile (18) has a molding (34) on the side of the shorter parallel wall (20) and on the side of the longer parallel wall (22) always on the side of a crossing point (36), the moldings (34) lie opposite each other from the crossing point (36), their distance being approximately 1/10 of the tube profile width (B). 14. Pallet container according to any one of claims 1-13, characterized in that the formations (34) in the struts (30, 32) are formed to different depths depending on the intensity of the dynamic vibration loads acting on the strut frame (14) and/or the vertical and horizontal struts (30, 32). 15. Pallet container with a thin-walled, rigid inner container made of thermoplastic material for storing and transporting liquid or bulk materials, and a tubular frame (14) surrounding the inner container as a supporting shell and a bottom plate (16), on which the inner container (12) rests and to which the supporting shell is firmly connected, characterized in that the horizontal tubes (30) of the tubular frame (14) are flattened parallel or perpendicular to the vertical direction in the corner region bent at 90° - 18 w. 16. Pallet container according to claim 15, characterized in that the horizontal struts (30) are flattened on the inner side and/or the outer side by at least 1/4 of the height (H) of the profile cross-section (18) in the corner region bent at 90°. The authorized person: DANUBE Patent and Trademark Office Ltd. ANDRÁS WEICHINOER