WO2013124051A1 - Pallet container - Google Patents

Description

 pallet container

The invention relates to a pallet container with a thin-walled rigid

Inner container made of thermoplastic material for the storage and transport of liquid or flowable products, with the inner container as a support jacket tightly enclosing grid frame and a bottom pallet on which the inner container rests and with which the grid frame is firmly connected, wherein the grid frame of vertical and horizontal firmly connected at the intersections

Profile bars exists.

State of the art

Pallet containers are used for the transport and storage of liquid or flowable, partially dangerous products. During transport of filled pallet containers - especially for high specific weight products and stacked pallet containers - on bad roads - with hard-sprung ones

Lorries, in rail or sea transport, the lattice frameworks are significantly burdened. These transport loads generate due to stacking load in stacked pallet containers axial pressure loads on the lattice frame and by permanent dynamic surge, which emanate from the liquid filling, in addition radial Biegewechselbelastungen on the usually welded grid frame. The

Welded joints or the welding areas of the crossing points of the vertical and horizontal bars or grid pipes, are the places with the highest

Stresses. Such stresses can lead after a certain period to break the welded joints or the grid pipes, so that the required stacking and transport safety of such pallet container is no longer given.

All known pallet container with lattice frame have welded joints at the intersections of the pipe bars; In some pallet containers, elasticized bending points are molded into the pipe bars in addition to the welding points to relieve the welding areas.

Pallet containers with welded tubular frame are well known, such as EP 0 734 967 A2 (Sch). The lattice frame of the pallet container known from this consists of a round raw rprofil, which welded to the

CONFIRMATION COPY Crossing is strongly trough-shaped recessed and thus forms four contact points for the mutual welding in crossed tubes. The limited elastic bending points are created by additional depressions of the Schweißmuldenendbereiche.

From EP 0 755 863 A1 (Fust) another pallet container is known, the

Grid bars have a square tube profile, which is partially partially pressed only slightly in the crossing area for a better welding and thereby forms the four points of contact for welding. The tube profile otherwise has a constant cross-section between the crossing points, over the entire length, without any indentations.

From DE 196 42 242 A1 (red) another pallet container is known with a lattice frame of open trapezoidal profile bars and the rod length

consistent profile. Here are the four welds to the

Intersection points through the flattened outwardly flat surfaces of the profile bars.

Another pallet container with a consistent continuous tube profile is known from US 6,244,453 B1 (Mam). Here are the four welds at the rod intersection points through the continuous two- or four-sided square profile recesses with outside longitudinal ribs.

From EP 1 289 852 (Mau) another pallet container is known, the bars of which have a trapezoidal tube profile which has four welding points in the crossing area. In the area next to the crossing points of the pipe bars on the

Welding area opposite pipe side are formed recesses, which act as predetermined bending points.

Another pallet container with four welding points in the intersection of the

Pipe rods is known from EP 1 618 047 B1 (Mau). The elastic behavior of the

Gitterrohrrahmens is achieved here by reducing the pipe cross-section height between or outside the welded intersections.

From DE-A 10 2010 033 738 1 (R .Bu) another pallet container is known, the lattice cage is characterized in that the crossed profile bars of the cage by punch riveting, TOX- clinch riveting or pure Verclinchung a non-positive and positive, fatigue-proof Joint connection are fixed against each other. Another pallet container with spot welds and clinch connections of the ends of the vertical profile bars of the grid profile support jacket with the upper horizontal profile bar is further known from DE-A 10 2005 031 940 (Sch).

Disadvantages of the prior art

The previously known lattice frame with uniform continuous lattice tube profile and two or four welds at the intersection points have the common drawback that the horizontal and vertical lattice tube bars filled during transport

Pallet container bending stress in total to bending and torsion stiff ??? are. As a result, fatigue cracks and bar breakage occur here after a comparatively short period of use, especially in the vicinity of the welded section

Crossing points of the bars on, or the welds of the intersections break up and tear off.

When double stacking of pallet containers, especially the connection of the upper horizontal profile bar on the vertical profile bars is a weak point.

Those grid tube frames with welded round tubes with 4 welds, e.g. known from EP 0 734 967 A2 (Sch), and with in the region of the crossing points

provided significantly reduced pipe cross-section height (no continuous pipe profile, everywhere equally deep dents or reduced pipe cross-section height of the

Stabkreuzungsstellen), have the disadvantage that in these areas of reduced pipe cross section considerable load peaks occur and thereby breaking or - kinks z. B. in case tests, in hydraulic internal pressure tests and bending stress voltages are pre-programmed by transport loads, so to speak.

Those known trellis frame with four welds in the crossing region of the pipe bars and adjoining offending predetermined bending or predetermined bending areas - known from EP 1 289 852 and EP 1 618 047, have the disadvantage that the pipe rod areas are not uniformly loaded and only the areas with reduced pipe cross-section the bending alternating voltages of Must absorb transport loads. In principle, all tubular bars of the tubular space frame must be oversized with predetermined bending points in the initial profile, because only the reduced Rohrstabquerschnitts- height of the predetermined bending points absorbs the bending alternating stresses, but this reduces the static load capacity of the entire space frame.

All known pallet container with welded tubular frame or with

Welded wire mesh as a support jacket have the following disadvantages:

The welding is done by resistance shearing, a simple welding with high energy consumption; Not all materials can be welded together by resistance welding;

Biegeschwellbelastungen come to break the welds.

Those, for. B. from DE 10 2005 031 940 known lattice tube frame with

Spot welds and another clinch connection at the ends of the vertical profile bars of the grid profile support jacket with the top horizontal

Profile bar have no additional to the adverse spot welding

mechanical interlocking connections at the other intersection points of the vertical and horizontal profile bars of the lattice tube frame.

Those known lattice tube frame of bar profiles, which form the cage by punch riveting. TOX clinch rivets or clinching form so-called joint connections, have the following disadvantages:

When using standard profiles with 15 to 25 mm bar width for the

Grid frame can be realized at each intersection of the lattice frame because of the size or dimensions of the joint connection only one or two joints at the most, these joints must absorb the same forces as in a pallet container with a lattice frame from continuous lattice tube profile with four welds at the intersection. If a lattice tube profile made of a non-metallic material is used, then the mechanical load-bearing capacity of the joint connection is further reduced because of the poorer material properties of the non-metallic material. task

It is the object of the present invention to provide a generic pallet container with a grid profile support casing of permanently connected profile bars, which no longer has the disadvantages of the prior art - taking into account the stacking load of a filled stacked pallet container (double stacking) in addition to the usual transport surge loads of liquid filling.

Solution of the task

This object is achieved by a pallet container with the features of claim 1. The dependent claims include advantageous and

expedient developments of the invention.

The pallet container according to the invention for liquids with a grid profile support jacket sealingly enclosing the inner container as a support jacket and having a base pallet on which the inner container rests and with which the grid profile support jacket is firmly connected, wherein the grid profile support jacket, which can be rigid or collapsible, from vertical and horizontal at the intersection points firmly connected

Profilstäben exists, characterized by the following advantages:

No welding on all grid profile support jacket joints, the

Connection is made by mechanical joining, it can not be

connect resistance weldable materials as profile bars, it can, for. Profile bars made of steel, aluminum, fiber composites and plastic are connected to each other, there is no thermal influence on the connection zone and the mechanical joining is cheaper by a lower energy consumption. The profile bars can have different wall thicknesses and be designed as a bar profile, shape profile or hollow profile. The mechanical joints can be made without pre-punching with one-sided accessibility. Mechanical joints have high dynamic tag capabilities.

In addition, here the profile bars at their intersections by a

mechanical interlocking locked to each other and mechanically supported on the grid profile cross joints of the upper and lower horizontal profile bar to relieve the clinch, Stanzniet- or clinch joint connections. This mechanical form closure also stiffens, with a mechanical joint connection per grid profile cross impact especially in foldable or collapsible grille profile-supporting coats which consist of separate side panels, their shape-rigidity.

In the case of double stacking of pallet containers, the stacking load of the stacked pallet container must be taken up by the upper horizontal profiled bar of the grate profile supporting jacket and by the vertical profiled bars and the lower horizontal bar

Profile bar to be transferred to the floor pallet. Additional support surfaces on the upper and lower lattice profile cross joints effectively relieve the punch rivet, clinch rivet or clinch joint connections of the stack load.

In one embodiment of the invention, the grid profile support jacket of a

Pallet container collapsible or foldable. At the same

Base area, the pallet container height is reduced to about 1/3 of the original height. It is advantageous in this embodiment that due to the reduced volume of the collapsed pallet container, the transport costs and the cost of storage of the pallet container without inserted inner container can be significantly reduced.

The invention will now be described schematically with reference to the drawings

illustrated embodiments described and described. Show it:

 1 shows a pallet container according to the invention in front view,

 FIG. 2 shows a side view of a pallet container according to the invention,

 Figure 3 at a view of a pallet container according to the invention

 Double stacking,

 Figure 4 is a view of a grid profile crossing point according to the invention

 (Position 18 in FIG. 2),

 5 shows a section A-B through a vertical profile bar of Fig. 4,

 6 shows a section C-D through a grid profile crossing point of Fig. 4 with

 mechanical joint connection by clinching,

 7 shows a section C-D through a further grid profile crossing point of FIG. 4 with a mechanical joint connection by means of punch rivets with half-tubular rivet, FIG.

8 shows a section CD through a further grid profile crossing point of FIG. 4 with mechanical joining connection by means of punch rivets with solid rivet, FIG. 9 shows a section EF through a horizontal profiled bar support of FIG. 4,

FIG. 10 shows a section E-F through a horizontal profile bar receptacle of FIG. 4,

FIG. 11 shows a section E-F through a further horizontal profile bar receptacle of FIG. 4,

FIG. 12 shows a view of an upper grille profile cross joint (position 24 in FIG. 2),

13 shows a standard profile bar connection, upper horizontal / vertical profile bar according to section G-H in FIG. 12, FIG.

 Figure 14 shows a profile bar connection according to the invention, upper horizontal / vertical

 Profile bar, according to section G-H of FIG. 12,

 FIG. 15 shows another profile bar connection according to the invention, upper horizontal / vertical profile bar, according to section G-H of FIG. 12,

 FIG. 16 shows another profile bar connection according to the invention, upper horizontal / vertical profile bar, according to section G-H of FIG. 12,

 FIG. 17 shows a view of a grid profile cross joint according to the invention below (position 26 in FIG. 2),

 18 shows a standard profile bar connection, lower horizontal / vertical profile bar according to section I-J of FIG. 17, FIG.

 19 shows a profile bar connection according to the invention, lower horizontal / vertical

 Profile bar, according to section l-J of FIG. 17,

 FIG. 20 shows another profile bar connection according to the invention, lower horizontal / vertical profile bar, according to section I-J of FIG. 17 and FIG

 FIG. 21 shows another profile bar connection according to the invention, lower horizontal / vertical profile bar, according to section I-J of FIG. 17.

In Figure 1, an inventive pallet container 10 with thin-walled rigid inner container 12 made of thermoplastic material, grid profile support jacket 14 and bottom pallet 16 is shown in front view (pallet width 1000 mm). Of the

Pallet container 10 is shown in Figure 2 in side view (pallet length 1200mm).

FIG. 3 shows a pallet container 10 according to the invention in double stacking. This type of stacking is common in transportation e.g. by lorries or in overseas containers according to ISO 668. In the double stacking of the grid profile support casing 14 of the stacked pallet container 10 at transport loads next to

Swell forces of its contents (radial) also by the weight of the stacked PalettenbehälterslO (axial) loaded. A grid profile crossing point 18 according to the invention of the grid profile support jacket 14, formed by two U-shaped bar profiles 28 according to FIG. 5, is shown in FIG. Section CD of Figures 4, 12 and 17 show the horizontal 22 and vertical 20 section bars with their mechanically joined connection. The sections CD are identical in FIGS. 4, 2 and 17, the mechanical joining connections can be carried out according to FIGS. 6, 7 and 8.

FIG. 6 shows a mechanical joining connection of the U-shaped vertical 20 and horizontal 22 profile bars by means of clinching or clinching. The mechanical clinch connection is achieved by pressing and moving material from the clinch cavity region 30 of the horizontal profile bar 22 and subsequent insertion and compression in the clinch joining region 32 of the vertical profile bar 20. Advantageous in this mechanical joint connection are the low energy consumption and no thermal influence on the joining zone.

FIG. 7 shows a further inventive mechanical joining connection of the U-shaped vertical 20 and horizontal 22 profile bars. The mechanical

Joining connection is made by the Halbhohlniet 34 of the punched rivets the

Halbhohlniet joining region 36 forms and thereby permanently connects the vertical 20 and horizontal 22 profile bar.

Another mechanical joint connection according to the invention is the punch rivet with full rivet 38, which is shown in FIG. The mechanical joining connection between the profiled bars 20 and 22 is produced by the punching rivet 38 and by the material displacement in the joining area 40 of the punching rivet 38. The punch riveting with solid rivet 38 is like the punch riveting with the Halbhohlniet 34 without pre-drilling and is therefore easy to automate.

Figures 9, 10 and H show at a grid profile intersection point 18 of the grid profile support jacket 14 according to the invention, the support of the horizontal profile bar 22 on the vertical profile bar 20, wherein the horizontal profile bar 22 via the receiving groove 42 in Figure 10 or on the punched out Centering 43 in Figure 11 is additionally fixed in a form-fitting manner in the vertical profile bar 20.

The view of a grid profile cross joint according to the invention at the top 24 of the grid profile support jacket 14 is shown in FIG. 12, wherein the mechanical clinching, punch riveting or clinch-joint connection between the upper horizontal section bar 22 and the vertical profile bar 20, as shown in Figures 6,7 and 8 in section CD can be performed.

FIGS. 13, 14, 15 and 16 show the contact of the upper horizontal profiled bar 22 with the vertical profiled bar 20, the horizontal profiled bar 22 being supported by the shoulder 44 in FIG. 15 or by the stamped lower centering 43 in FIG becomes. Figure 16 shows a modified U-shaped upper horizontal profile bar 22 with a support leg 45, which takes over the support on the vertical profile bar 20. FIG. 13 shows the support of the horizontal profiled rod 22 on the vertical profiled bar 20 without vertical support.

The view of a grid profile cross joint according to the invention below 26 is shown in Figure 17, wherein the mechanical clinch, Stanzniet- or Clinch-joint connection between the horizontal section bar 22 and the vertical profile bar 20, as in Figures 6, 7 and 8 in section CD shown, can be done.

The figures 18. 19. 20 and 2Λ show the on / edition of the vertical profile bar 20 on the lower horizontal profile bar 22, wherein the vertical profile bar 20 in Figure 20 on a T-shaped lower horizontal profile bar 22 with a support leg 47 or on a punched-out paragraph 46 in Figure 19 additionally rests. Figure 21 shows an L-shaped lower horizontal profile bar 22 with two support areas 48, which take over the support of the vertical profile bar 20. FIG. 18 shows the installation of the horizontal profiled rod 22 on the vertical profiled bar 20 without additional vertical support of the vertical profiled bar 20.

References list

10 pallet containers

 12 inner containers

 14 grid profile support jacket

 16 floor pallet

 18 grid profile crossing point

20 vertical profile bar horizontal profile bar

Grid profile cross push up

Grid profile cross push down

U-shaped bar profile

Clinch-cavity

Clinch-joining area

semi-hollow rivet

Semi-tubular riveting area

Stanzvollniet

Punching rivet joining area

Receiving groove horizontal profile bar stamped centerings

Support area horizontal profile bar support leg

punched heel vertical profile bar support leg

Support area vertical profile bar

Claims

claims 1.) pallet container (10) with a thin-walled inner container (12) made of thermoplastic material for the storage and transport of liquid or flowable products, with a inner container (12) as a support jacket tightly enclosing grid profile support jacket (14) and with a bottom pallet (16) on which the inner container (12) rests and with which the grid profile support jacket (14) is fixedly connected, wherein the grid profile support jacket (14) comprises crossing vertical (20) and horizontal (22) profile bars, wherein the Connection of the vertical (20) and horizontal (22) profile bars at their intersections by mechanical joining such as clinching, punch riveting or clinching done, characterized in that  the profile bars (20, 22) at their connection points (18, 24, 26) in addition a mechanical positive engagement (42, 43) or a positive locking Supporting region (42, 43) and are thus fixed against rotation. 2) pallet container (10) according to claim 1, characterized in that the additional mechanical form closure the profile bars (22, 20) of the grid profile support jacket (14) at their intersection (18) by placing the vertical profile bars (20) in receiving grooves (42) of the horizontal profile bars (22). 3) pallet container (10) according to claim 1, characterized in that the additional mechanical positive locking the profile bars (22, 20) of the grid profile support jacket (14) at their intersection points (18) by placing the vertical profile bars (20) in stamped centerings (43) of the horizontal profile bars (22). 4) pallet container (10) according to claim 1, 2 or 3, characterized in that the support of the upper horizontal profile bar (22) of the lattice profile support mantle (14) on the lattice cross profile top (24) on the vertical profile bars (20) on the paragraphs (44) or the stamped lower centerings (43) of the vertical profile bars (20 ) he follows. 5) Pallet container (10) according to one of the preceding claims 1 to 4, characterized in that  The support of the upper horizontal profile bar (22) of the lattice profile support mantle (14) on the lattice profile cross impact above (24) on the vertical profile bars (20) via a shoulder (45) of the horizontal profile bar (20). 6) pallet container (10) according to one of the preceding claims 1 to 5, characterized in that the support of the vertical profile bars (20) of the grid profile support jacket (14) on the grid profile cross joint bottom (26) on the support leg (47) of the lower horizontal profile bar (20). 7) pallet container (10) according to one of the preceding claims 1 to 6, characterized in that the support of the vertical profile bars (20) of the lattice profile support mantle (14) on the lattice profile cross joint bottom (26) by their punched heels (46) on the lower horizontal profile bar (22). 8) Pallet container (10) according to one of the preceding claims 1 to 7, characterized in that the profile bars (20,22) of the grid profile support jacket (14) made of different materials and / or different cross-sectional profiles. 9) Pallet container (10) according to one of the preceding claims 1 to 8, characterized in that  The mechanical joints are made free of separate pre-holes. 10) pallet container (10) according to one of the preceding claims, characterized in that the vertical and / or horizontal profile bars (20, 22) of the grid profile support jacket (14) have a substantially continuous profile. 11) pallet container (10) according to any one of the preceding claims, characterized in that the grille profile support jacket (14) is rigid. 11) pallet container (10) according to any one of the preceding claims, characterized in that the grille profile support jacket (14) is designed collapsible or foldable. 12) pallet container (10) according to one of the preceding claims, characterized in that the connection of the vertical (20) and horizontal (22) profile bars by mechanical joining only at some grid profile crossing points (18) is executed.