Liquid transport and storage container

Abstract

The invention relates to a transport and storage container for liquids, comprising a tray-type lower structure for an inner container (11) made of plastic, which has four side walls, a lower base and an upper base (16, 17), a sealable filling spout (19) formed on the upper base (17) and an outlet spout formed on the lower part of the side walls, which has a discharge fitting, which transport and storage container comprises a cage (22) with horizontal and vertical bars (23, 24) made of metal for receiving the inner container (11), wherein at least two vertical bars (24) arranged on opposite side walls are connected at a connection part (25) by a transverse bar (30), which extends above the upper base (17) of the inner container (11) and is formed from a hollow profile, the vertical bars (24) or the transverse bar (30) connected together via the transverse bar (30) having a cross-sectional recess in a transition part for reducing the shear forces acting on the connecting screws, which transition part is formed adjacent to the connection part (25, 31).

Description

Technical Field

[0001] This invention relates to a container for transporting and storing liquids, comprising a tray-type lower structure for an inner container made of plastic, the inner container having four side walls, a lower base and an upper base, a sealable filling spout formed on the upper base, and an outlet spout formed on the lower part of the side walls, the outlet spout having a vent fitting. The transport and storage container includes a cage having horizontal and vertical rods made of metal for receiving the inner container. The ends of the vertical rods, formed of hollow profiles, are welded to the lower and upper circumferential edge profiles of the cage. The upper end of the vertical rods has a connecting portion for connecting to the upper edge profile, the connecting portion having a flat section formed by deformation of the hollow profile. Two vertical rods, each mounted on an opposing sidewall, are connected at a connection point by a horizontal rod. The horizontal rod extends above the upper base of the inner container and is formed of a hollow profile. The connection points of the vertical rods are respectively connected via threaded joints to connection points formed at the ends of the horizontal rods by deformation of the hollow profiles into flat sections. The connection points of the horizontal rods are bent open relative to the longitudinal portion, which extends above the upper base of the inner container. The connection points of the horizontal rods extend toward the connection points of the vertical rods and have fastening openings with walls for forming threaded engagement with connecting screws. The connecting screws are guided through the channel openings of the connection points of the vertical rods. Background Technology

[0002] The aforementioned transport and storage containers undergo compliance checks according to their type to ensure adherence to prescribed safety standards when using transport and storage containers (also known as medium bulk containers, IBCs). During this compliance check, the compressive strength of the transport and storage containers is examined, specifically by applying increased hydraulic internal pressure to the inner container. As a result, the corresponding deformation forces acting on the inner container must be absorbed by the cage receiving the inner container. The threaded joints formed between the vertical and horizontal bar connections experience excessive stress due to shear forces acting on the threaded joints in the connection area. This causes the threaded holes formed in the horizontal bar connection to widen, resulting in the disengagement of the threaded engagement between the connecting screws and the horizontal bar connection, leading to component failure. Summary of the Invention

[0003] The purpose of this invention is to provide a transport and storage container characterized by improved safety against failure for the threaded joint formed between the transverse bar and the cage.

[0004] This objective is achieved by the transport and storage container according to the invention.

[0005] According to the invention, the vertical or horizontal bar has a cross-sectional recess in the transition portion to reduce the shear force acting on the connecting screw, wherein the vertical bars are connected to each other via the horizontal bars, and the transition portion is formed adjacent to the connecting portion in the transition region toward the hollow profile.

[0006] Tests show that the shear force related to the safety of the threaded joint components is mainly caused by the fact that when the inner container expands due to the increase in hydraulic internal pressure, the transverse bar deforms in such a way that the transition portion of the connecting part adjacent to the transverse bar contacts the end of the screw protruding from the fastening opening of the connecting part of the transverse bar, such that the deformation force acts as a shear force on the connecting screw through the transition portion, and the threaded engagement between the connecting screw and the connecting part of the transverse bar disengages due to the widening of the wall of the fastening opening.

[0007] According to the invention, the cross-sectional recess can be formed in the transition portion of the vertical bar or the transition portion of the horizontal bar, or simultaneously in the transition portion of both the vertical bar and the horizontal bar. By means of this cross-sectional recess, physical contact can be prevented between the transition portion of the horizontal bar and the connecting screw, thereby avoiding the generation of corresponding harmful shear forces on the connecting screw.

[0008] According to a preferred embodiment of the invention, a cross-sectional recess in the transition portion of the transverse bar is formed opposite to the screw end protruding from the fastening opening and serves to receive the screw end as the transition portion approaches it. This embodiment of the cross-sectional recess allows the deformation path of the transverse bar to increase due to the expansion of the internal container, while preventing the transverse bar and the screw end from contacting. Therefore, physical contact between the transverse bar and the screw end is avoided, or the possible deformation path of the transverse bar is increased before physical contact is formed.

[0009] The cross-sectional recesses in the transition portion of the transverse bar can be formed as depressions or recesses between the longitudinal edges of the transverse bar. Recesses are particularly advantageous because they maintain increased bending stiffness of the transverse bar in the transition region compared to recesses or hollow portions extending across the entire width of the transition member.

[0010] According to another preferred embodiment of the invention, a cross-sectional recess in the transition portion of the vertical rod forms a predetermined bending point that allows the connecting portion to pivot outward about the predetermined bending point away from the inner container and about an axis parallel to the upper edge profile when shear force is applied to the connecting portion via the transverse rod. In such an embodiment, because the reduced bending stiffness of the transition portion of the vertical rod causes the connecting portion of the vertical rod to pivot outward about the predetermined bending point in the same direction as the deformation of the transverse rod, physical contact between the transverse rod and the screw end, which is detrimental to the strength of the threaded joint, is prevented or delayed.

[0011] It has been shown that it is particularly advantageous to form the predetermined bending point as a groove, which is disposed on the outer surface of the vertical bar in the transition section and extends parallel to the upper edge profile, thereby achieving the desired reduced bending stiffness in the region of the predetermined bending point. Attached Figure Description

[0012] Preferred embodiments of the invention will be described in more detail below with reference to the accompanying drawings.

[0013] Figure 1 A perspective view of a transport and storage container including a cage with transverse bars along its upper edge outline is shown.

[0014] Figure 2 An enlarged view of the transverse bar connection area formed on the cage is shown;

[0015] Figure 3 It shows that according to Figure 2 Cutting line III-III in Figure 2 A cross-sectional view of the transverse bar connection area shown;

[0016] Figure 4 It shows in Figure 1 The transport and storage containers shown are subjected to increased internal pressure. Figure 3 An enlarged view of the horizontal bar connection area shown. Detailed Implementation

[0017] Figure 1 A transport and storage container 10 for liquids is shown. The transport and storage container 10 can be used as a disposable or reusable container and includes an inner container 11 made of plastic, having four side walls 12, 13, 14, and 15, a lower base 16, and an upper base 17. A filling spout 19 is formed on the upper base 17 and is sealable with a lid 18. An outlet spout 20 is formed on the lower portion of the front side wall 13, the outlet spout 20 having a discharge fitting 21. The transport and storage container 10 also includes an outer cage 22 formed by the intersection of horizontal bars 23 and vertical bars 24 made of metal for receiving the inner container 11. The vertical bars 24 are welded to an upper edge profile 26 via an upper connecting portion 25 and to a lower edge profile 28 of the cage 22 via a lower connecting portion 27. Furthermore, the cage 22 is connected to a tray-type lower structure 29 via its lower edge profile 28.

[0018] like Figure 1As shown, the cage 22 is provided with two transverse rods 30, which extend above the upper base 17 of the inner container 11 and are parallel to each other in this case. The transverse rods 30 are connected to the upper connecting portion 25 of the vertical rod 24 via threaded joints 32 at connecting portions 31, with the connecting portions 31 formed at each longitudinal end of the transverse rod, as shown. Figure 2 As shown. Figure 3 As shown, the connecting portion 31 of the transverse bar 30 and the connecting portion 25 of the vertical bar 24 are formed by the flat sections of the transverse bar 30 and the vertical bar 24, respectively (the transverse bar and the vertical bar are formed by hollow profiles 33 and 34, respectively), and are separated from the longitudinal portions 37 and 38 formed by hollow profiles 33 and 34 by transition portions 35 and 36, respectively.

[0019] Especially as Figure 3 As shown, the connecting portion 31 of the transverse bar 30 is bent open relative to the longitudinal portion 37 of the transverse bar 30, such that the connecting portion 31 of the transverse bar 30 and the connecting portion 25 of the vertical bar 24 extend in a substantially parallel plane. The connecting portions 31 and 25 are connected to each other by a connecting screw 39 in a force-fit manner. The connecting screw 39 extends through the channel opening 40 formed in the connecting portion 25 of the vertical bar 24 and through the fastening opening 41 formed in the connecting portion 31 of the transverse bar 30.

[0020] In order to form a force fit, the connecting screw 39 is screwed into the fastening opening 41, which is formed as a threaded hole, by the screw end 42 passing through the fastening opening 41, so that a threaded engagement is formed between the wall 43 of the fastening opening 41 and the screw end 42.

[0021] In particular, Figure 2 and Figure 3 In this embodiment of the transport and storage container, the transition portion 35 formed between the connecting portion 31 and the longitudinal portion 37 of the transverse bar 30 and the transition portion 36 formed between the connecting portion 25 and the longitudinal portion 38 of the vertical bar 24 both have cross-sectional recesses formed as recesses 44 or grooves 45, the recesses 44 being formed opposite to the screw end 42 protruding from the fastening opening 41, and the grooves 45 being formed in the outer surface 46 of the bar 24 away from the inner container 11 and extending parallel to the upper edge profile 26.

[0022] To explain the beneficial effects of recess 44 and groove 46 when the inner container 11 is subjected to increased hydraulic internal pressure, Figure 4 The diagram schematically illustrates the deformation state within the region of the threaded connector 32. For example, the undeformed state of the threaded connector 32 (e.g.) Figure 3 (as shown) and deformation state (such as) Figure 4As shown in the comparison between the two, the recess 44 formed in the transition portion 35 of the transverse bar 30 allows the transition portion 35 to approach the screw end 42 in the event of deformation without forming physical contact between the screw end 42 and the transition portion 35. The recess 44 creates a free space in the transition portion 35, which the screw end 42 can insert into when the transition portion 35 approaches the screw end 42.

[0023] also, Figure 3 and Figure 4 The comparison between the illustrations shows that the groove 45 formed on the outer surface 46 of the vertical rod 24 in the transition portion 36 forms a predetermined bending point. When shear force is applied to the connecting portions 25, 31 via the transverse rod 30 due to the expansion of the inner container 11, this predetermined bending point allows the connecting portions 31, 25 to pivot about the predetermined bending point and outward about an axis parallel to the upper edge profile 26. This allows the screw end 42 of the connecting screw 39 to avoid approaching the transition portion 35 of the transverse rod 30 due to this pivoting movement, in addition to the possibility of inserting the recess 44 as described above.

[0024] As can be seen from the above, forming a recess 44 in the transition portion 35 of the transverse bar 30 and a groove 45 in the transition portion 36 of the vertical bar 24 allows physical contact between the transition portion 35 of the transverse bar 30 and the screw end 42 to be avoided. In the illustrated embodiment, forming both the recess 44 and the groove 46 simultaneously allows for a particularly advantageous overlap of effects.

Claims

1. A container (10) for transporting and storing liquids, comprising a tray-type lower structure (29) for an inner container (11) made of plastic, the inner container (11) having four side walls (12, 13, 14, 15), a lower base (16) and an upper base (17), a sealable filling spout (19) formed on the upper base (17) and an outlet spout (20) formed on the lower part of the side walls (12), the outlet spout (20) having a vent fitting (21), the transport and storage container including a horizontal bar (2) made of metal. 3) A cage (22) with vertical rods (24) for receiving an inner container (11), the ends of the vertical rods (24) formed of hollow profiles are welded to the lower circumferential edge profiles (26) and the upper circumferential edge profiles (28) of the cage (22), the upper end of the vertical rods (24) having a connecting portion (25) for connecting to the upper edge profiles (26), the connecting portion (25) having a flat section formed by deformation of hollow profiles (34), and transverse rods extending above the upper base (17) of the inner container (11) and formed of hollow profiles (33). Its features are, The connecting portions (25) of at least two vertical rods (24) set on opposite sidewalls (12, 14) are connected by a horizontal rod (30). The connecting portion (25) of the vertical rod (24) is connected via a threaded joint (32) to the connecting portion (31) at the end of the horizontal rod (30) formed by deforming the hollow profile into a flat section. The connecting portion (31) of the horizontal rod (30) bends open relative to the longitudinal portion (37) extending above the upper base (17) of the inner container (11) and extends toward the connecting portion (25) of the vertical rod (24). The connecting portion (31) of the horizontal rod (30) has a fastening opening with a wall for forming a threaded engagement with a connecting screw (39). The connecting screw is guided through the channel opening (40) of the connecting portion (25) of the vertical rod (24). in, The vertical rod (24) or the horizontal rod (30) has a cross-sectional recess in the transition portion (36, 35) to reduce the shear force acting on the connecting screw (39). The vertical rods (24) are connected to each other via the horizontal rods (30), and the transition portion (36, 35) is formed adjacent to the connecting portion (25, 31).

2. The container according to claim 1, characterized in that, The cross-sectional recess in the transition portion (31) of the transverse bar (30) is formed opposite to the screw end (42) protruding from the fastening opening (41) and is used to receive the screw end (42) when the transition portion (31) approaches the screw end (42).

3. The container according to claim 2, characterized in that, The cross-sectional recess is formed as a depression (44) or recess, which is formed in the transition portion (31) of the transverse bar (30) between the longitudinal edges of the transverse bar (30).

4. The container according to claim 1, characterized in that, The cross-sectional recess in the transition portion (25) of the vertical bar (24) forms a predetermined bending point. When shear force is applied to the connecting portions (25, 31) via the transverse bar (30), the predetermined bending point allows the connecting portions (25, 31) to pivot outward about the predetermined bending point away from the inner container (11) and about an axis parallel to the upper edge profile (26).

5. The container according to claim 4, characterized in that, The predetermined bending point is formed as a groove (45), which is provided on the outer surface (46) of the vertical rod (24) in the transition portion (25) and extends parallel to the upper edge profile (26).

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