EP3256401B1 - Pallet-type base for transportation and storage containers for liquids - Google Patents

Description

The invention relates to a pallet-like base, in particular for transport and storage containers for liquids, which are equipped with an inner container made of plastic, with a closable filler neck and a discharge nozzle for connecting a removal fitting, wherein the base frame an outer shell of a metal mesh or sheet, and a Floor for supporting the inner container, corner feet and arranged between the Eckfüßen middle feet and a floor cross-piece, wherein at least two middle feet at least the outer shell and the floor cross member are fixed, wherein the respective metatarsal, the outer shell and the floor cross are connected positively by a screw, wherein the screw in the outer shell and the floor cross trained through openings. Furthermore, the invention relates to a transport and storage container with such a base.

Underframes of the type mentioned form a, for example, with suitable Hubstapeleinrichtungen manageable platform for storage and transport of plastic inner container formed. The Outer jacket serves to protect the relatively vulnerable inner container from damage. The pallet-like undercarriage is therefore intended in particular to absorb impact loads which can act on the inner container, for example in the event of an impact of the transport and storage container on a floor. In particular, in an oblique impact of the transport and storage container on the ground or a substrate, it may come to a deformation or slipping of the inner container on the bottom of the undercarriage due to the inertia of a flowable medium located in the inner container. As a result, the outer sheath can be deformed in the region of the bottom of the underframe so that a protective sheath of the inner container formed by the outer casing and the bottom of the undercarriage tears in this area and the inner container is damaged. For transport and storage containers, which are intended for the transport of dangerous goods, therefore, appropriate, standardized drop tests are provided, although it is desirable to secure transport and storage containers in general against such damage.

In order to produce the bases for transport and storage containers as stable as possible at a reasonable cost of materials and low cost, it is known to bolt the outer shell directly with the interposition of the soil with the feet. The bottom and the feet of the undercarriage form a pallet, wherein the feet on an underside can also be interconnected by runners or a frame. Since the bottom serves to support the inner container, a bottom cross member is regularly provided below the bottom, which is arranged between two middle feet and connects them together. The bottom cross member also serves to stabilize the undercarriage in the event of an impact of the transport and storage container along a Fußrahmenseite on a substrate.

In the known transport and storage containers or bases of the outer shell or a lower surface of the outer shell with the Floor, the floor crossbar and the middle feet connected by screws. To make a production of the undercarriage as simple and inexpensive as possible, the screw is passed through sufficiently large through holes in the peripheral edge, the bottom and the floor cross member and screwed only in the metatarsus. In the above impact of the transport and storage container along a Fußrahmenseite it can now come as a result of considerable tensile stress of the screw to a tearing of the screw or tearing a thread of the screw from the metatarsal, whereupon the lower peripheral edge of the outer shell from the bottom of the undercarriage is separated so that the inner container can be deformed or damaged in this area. A tensile force acting on the screw from the peripheral edge of the outer shell acts directly on the connection between the screw and the metatarsus, since a force flow takes place solely from the peripheral edge through the screw to the metatarsus. In particular, if lightweight and inexpensive materials such as plastic or wood are to be used for the metatarsus, therefore, the screw and metatarsal screw connection has proven to be a weak point in case tests. In addition, the screw may be incorrectly positioned or "over-tightened" during assembly. Depending on the location, even high temperatures can weaken a screw connection with, for example, plastic.

It is essential in such a mounting configuration that, to facilitate a relative positioning of the components in a mounting sufficiently large through holes are provided in the peripheral edge, in the bottom and in the floor cross so that they can be easily aligned relative to each other and the screw easily inserted through the through holes and can be screwed to the metatarsus. In particular, it is also advantageous if the passage openings are so generously dimensioned that a comparatively large clearance is formed between the aforementioned components and the screw.

From the EP 2 520 504 A1 is a base for transport and storage containers according to the preamble of claim 1, namely, a base of an IBCs with a bottom, a mesh basket and feet, wherein a bottom cross member is placed below the bottom of center feet. Screws pass through the mesh basket and are screwed into the metatarsus, wherein the bottom cross-piece is not positively connected to the screws in engagement, but has only comparatively large through holes through which the screws are passed.

The DE 81 13 030 U1 discloses a transport and storage container with a wooden pallet and an outer shell made of sheet metal and a metal floor. At the corners of the wooden pallet a Eckbefestigung is provided by means of a screw nail. The screw nail is driven into a rolled edge of the outer shell or sheet metal floor into a Eckfuß inside.

The present invention is therefore based on the object to propose a pallet-like base for a transport and storage container for liquids as well as a transport and storage container with a base, which ensures one or the increased security and yet easy and inexpensive to produce.

To solve this problem, the chassis according to the invention, the features of claim 1 and the transport and storage container according to the invention, the features of claim 14.

In the undercarriage according to the invention, in particular for transport and storage containers for liquids, which are equipped with an inner container made of plastic, with a closable filler neck and an emptying nozzle for connecting a removal fitting, the base frame has an outer shell of a metal grid or sheet, and a bottom to Supporting of the inner container, corner feet and between the Eckfüßen arranged middle feet as well as a ground traverse at least the outer shell and the floor cross-piece are fastened to at least two middle feet, wherein at least the respective metatarsal, the outer shell and the floor cross-member are positively connected to one another by means of a screw in a fastening configuration, wherein the screw engages through openings formed in the outer jacket and the floor cross-member wherein the passage opening is formed in the floor cross member for engagement of the screw, wherein an inner diameter of the through hole is smaller than an outer diameter of the screw, such that a tensile force formed between the floor cross member and the outer jacket is transferable via the screw.

The positive connection takes place in particular by the fact that the screw engages with a screw thread in a thread in the floor cross member. Thus, the screw is in engagement with the floor cross member in such a way that a tensile force acting between the floor cross member and the outer jacket can be transmitted via the screw. Accordingly, the screw is so firmly connected to the floor cross member, that a force flow, which as a result of a force acting on the outer sheath tensile force, can be introduced from the outer sheath into the screw and derived by the screw on the floor crosspiece. The screw is thus directly connected to the ground crossbar. Next, the screw is firmly connected to the respective metatarsus, so that one of the outer shell, caused for example as a result of a crash of the transport and storage container within the screw tensile force can be derived in the bottom crossbeam and the metatarsus. A screw of the screw and metatarsus is less stressed, resulting in increased stability and safety of the chassis, without further components would be required. A risk of corrosion does not exist when screwing the screw and floor cross member, since the screw is firmly connected or screwed to the floor cross member, so that a corrosion protection layer of a surface can not be destroyed by a relative movement of the components or no abrasion can take place.

In a preferred embodiment, the metatarsus, the outer shell, the bottom and the floor cross member may be positively connected by means of the screw. Then, the fastening configuration formed in this way also includes the bottom of the underframe, which does not necessarily have to be directly connected to it in the region of the middle feet.

Next, the screw can then pass through in each case formed in the outer shell and the bottom passage openings. The passage openings may preferably be formed so that a sufficiently large clearance between inner edges of the through holes and the screw remains. The passage openings in the outer jacket can then be formed in a peripheral edge of the outer jacket. For example, if the outer shell is formed of intersecting, horizontal and vertical metal bars, the through openings may each be formed in a lower horizontal tube, which then forms the peripheral edge.

Alternatively, a thread can be formed in the bottom, in which engages the screw. Accordingly, the screw would be connected not only to the metatarsus and the floor cross member by means of a screw, but also with the bottom of the undercarriage. Traction forces formed in the screw can then also be introduced into the ground.

The bottom cross member may preferably be formed of metal, wherein the bottom may be formed of metal or plastic material. It can also be provided integrally to form the floor cross member, for example as a profile element or a manufactured by forming metal sheet component. The floor can also be off a deep-drawn sheet metal are made particularly inexpensive and stable or alternatively from a plastic material. According to the invention, a passage opening for engagement of the screw is formed in the floor cross member. This can then also be ensured that the screw is always screwed at an installation of the undercarriage at the designated location on the floor cross member in this. The passage opening may be formed as a round hole or as a slot. Also, it is in the formation of a through hole of lesser importance which thickness has the material of the floor cross member. So then the floor cross member can be made very stable.

According to the invention, an inner diameter of the passage opening is smaller than an outer diameter of the screw. Thus, it can then be ensured that a thread of the screw actually engages in the region of the passage opening with the material of the floor cross member.

Advantageously, the passage opening can be formed with a depression. An indentation or beading allows for easier insertion of the screw into the through hole, such that the screw is guided to the through hole. Next, the area of the through hole or screw is stabilized by the depression, so that a tearing of the screw from the floor crossbeam is difficult. The recess can also be designed so that an inner edge of the passage opening in the floor crosshead forms a single thread or is approximated to a pitch of the screw. The depression can be formed with an opening angle of 90 °. In addition, the depression may be round or oval or with a slot.

Consequently, a thread or internal thread can be formed in the floor cross member, in which engages the screw. In this case, a thread can already be formed in a passage opening into which the screw is simply screwed.

Accordingly, the screw can be positively engaged with the metatarsus, such that a traction force formed between the metatarsus and the outer shell is transferable via the screw. The pulling force can thus, as already stated above, not be completely initiated by the screw alone in the metatarsus, but be absorbed to a considerable extent by the ground crosspiece. The screwed into the metatarsal screw or the thus formed screw is then less stressed, so that, especially in middle feet of plastic material or wood, a tearing of the screw can be avoided from the metatarsus.

In order to make the lower frame even safer or more stable, the floor crossmember can be positively connected to the metatarsus with another screw. The tensile force introduced into the floor crossmember can then be transmitted to the metatarsal via the screw. The formation of this further fastening configuration of ground cross-beam, further screw and metatarsus can advantageously prevent a tearing of the metatarsus from the ground crosspiece as a result of a fall of the transport and storage container. Thus, transverse forces acting on the midfoot can also be introduced into the ground crosspiece via the additional screw.

It has proven to be particularly advantageous if the middle feet are formed of a plastic material. Such middle feet are particularly stable, insensitive to moisture and can be produced inexpensively. Alternatively, the middle feet may be formed of metal, wood or other suitable material.

In the middle foot, a thread may be formed, in which engages the screw. An internal thread in the metatarsus may be cut or molded by the screw itself. Also, the metatarsus may be formed so that it already has a thread. Preferably, in the metatarsus a recess, such as a countersink or a bore may be formed to ensure safe guidance and positioning of the screw during assembly.

The subframe may have two opposite middle feet, which are connected to each other via the floor crossmember. Thus, the bottom of the undercarriage can be particularly easily supported or stabilized by means of the floor traverse. Also, the bottom cross-piece can connect three middle feet together, wherein the third mid-foot can then be fixed in a middle between the two outer middle feet on the floor crosspiece. Alternatively, it is also possible by means of the floor crossmember to connect two middle feet, which are arranged relative to each other with respect to the floor at right-angled side edges of the floor, so that the floor cross-member extends diagonally below the floor.

In addition, a clip may be provided, which surrounds the bottom cross member, the bottom and a peripheral edge of the outer shell, wherein the screw can then pass through the legs of the clip. The clip may then be bolted to the peripheral edge, the bottom, the bottom crossbeam and the midfoot, whereby a tensile force acting on the screw can be at least partially derived from the clip.

In the transport and storage container for liquids according to the invention, which is equipped with an inner container made of plastic, with a closable filler neck and an emptying nozzle for connection to a removal fitting, the inner container is on a bottom of a pallet-like underframe according to one or more of claims 1 to 13 arranged.

Fig. 1

Ein palettenartiges Untergestell nach dem Stand der Technik in einer perspektivischen Ansicht;

Fig. 2

eine Detailansicht eines Mittelfußes des Untergestells aus Fig. 1 ;

Fig. 3

eine Seitenansicht des Untergestells nach dem Stand der Technik aus Fig. 1 ;

Fig. 4

eine Schnittansicht entlang einer Linie IV-IV aus Fig. 3 ;

Fig. 5

eine Schnittansicht im Bereich eines Mittelfußes eines Untergestells;

Fig. 6

eine Detailansicht der Schnittansicht aus Fig. 5 ;

Fig. 7

eine perspektivische Detailansicht des Mittelfußes des Untergestells aus Fig. 5 ;

Fig. 8

eine perspektivische Ansicht einer Bodentraverse des Untergestells aus Fig. 5 .

Hereinafter, a preferred embodiment will be explained in more detail with reference to the drawings. Show it:

Fig. 1

A pallet-type underframe according to the prior art in a perspective view;

Fig. 2

a detailed view of a metatarsus of the underframe Fig. 1 ;

Fig. 3

a side view of the underframe according to the prior art Fig. 1 ;

Fig. 4

a sectional view taken along a line IV-IV Fig. 3 ;

Fig. 5

a sectional view in the region of a metatarsus of a base frame;

Fig. 6

a detailed view of the sectional view Fig. 5 ;

Fig. 7

a detailed perspective view of the metatarsus of the underframe Fig. 5 ;

Fig. 8

a perspective view of a floor cross member of the underframe Fig. 5 ,

The Fig. 1 to 4 show a transport and storage container 10 in different views, in particular, an inner container of the transport and storage container 10 is not shown here in detail, so that only a base 11 of the transport and storage container 10 is shown. The underframe 11 is essentially formed of an outer shell 12, a bottom 13 and corner feet 14 and disposed between the Eckfüßen 14 middle feet 15 and located between the middle feet 15 floor cross member 16. The corner feet 14 and the middle feet 15 are further arranged on runners 17 and 18, respectively. The bottom 13, the corner feet 14, the middle feet 15, the bottom cross member 16 and the runners 17, 18 together form a pallet 19. The on the pallet 19 arranged outer shell 12 is formed of intersecting, horizontal and vertical bars 20, 21 made of metal, in particular a lower, resting on the pallet 19 grid bar 20 of the outer shell 12 is formed as a tube 22, which via attachment points 23 with the Corner feet 14 and attachment points 24 is connected to the middle feet 15.

A synopsis of Fig. 2 and 4 shows an attachment point 24 with a midfoot 15, wherein in the in Fig. 2 shown view of the bottom 13 is not shown. The floor cross member 16 is formed from a profile body 25 made of metal, and is arranged on an upper side 26 of the midfoot 15. Next, the bottom 13 is placed above the bottom cross member 16 in an edge region 27 of the midfoot 15 on the bottom cross member 16 and the profile body 25. Furthermore, a passage opening 39 is likewise provided in the floor 13, wherein a screw 40 is screwed through the passage opening 39 and a passage opening 36 of the profile body 25 into the middle foot 15. The inner diameter 42 and 43 of the through hole 36 and 39 are dimensioned so large that a sufficiently large clearance is formed relative to a shaft 45 of the screw 40, which prevents contact with the screw 40 in the region of the inner diameter 42 and 43. The same applies to the passage opening 36 in the profile body 25, which is not shown in detail here.

A now caused as a result of a fall of the transport and storage container 10 on an outer edge 46 of the metatarsus 15 jerky force leads in turn to a deformation or slipping of the inner container, not shown here within the outer shell 12, so that the outer shell 12 in turn a tensile force in the direction of Longitudinal axis 47 of the screw 40 exerts on this. The tensile force acts directly on a screw 48 of the screw 40 with the metatarsus 15th

A synopsis of FIGS. 5 and 6 shows a sectional view of a base 51 of a transport and storage container not shown here in the region of a metatarsus 52. The basic structure of the transport and storage container and the base 51 corresponds to that in the Fig. 1 to 4 shown transport and storage container with the exception of the differences described below. An outer casing 53 of the undercarriage 51 rests with a tube 54 on a circumferential support surface 55 of a bottom 56 of the undercarriage 51. The bottom 56 is in turn in an edge region 57 of the metatarsus 52 together with an integral profile body 58, which forms a bottom cross member 59, on. The bottom crosspiece 59 and the profile body 58 connects the metatarsus 52 with an opposite metatarsal not shown here. Further, a screw 60 is provided, which is screwed into a top 61 of the middle foot 52 made of plastic material and thus forms a screw 62. The screw 60 thus connects the outer jacket 53 via the tube 54 to the bottom 56, the profile body 58 or the bottom crosspiece 59 and the middle foot, whereby a fastening configuration 63 is formed in an attachment point 64 on the middle foot 52.

From the enlarged view of Fig. 6 It can be seen that the screw 60 is passed through a through opening 65 in the tube 54, a through hole 66 in the bottom 56, and a through hole 67 in the profile body 58. In particular, an inner diameter 68 of the through-opening 65 and an inner diameter 69 of the through-opening 66 are selected such that the screw 60 or a shank 70 of the screw 60 is guided through the through-openings 65 and 66 while forming a clearance. An internal diameter of the passage opening 67 which is no longer visible here is smaller than an outer diameter 71 of the screw 60, so that when the screw 60 is screwed into the passage opening 67 in the passage opening 67 by means of an external thread 72 of the screw 60, an internal thread 73 in the passage opening 67 and thus a screw connection 74 is formed between the bottom beam 59 and the screw 60. A caused by the above load case of a fall of the transport and storage container pulling force acting in the direction of a longitudinal axis 75 of the screw 60 is thus introduced via the screw 60 in the middle foot 53, wherein a part of the tensile force also in the profile body 58 and The bottom cross-member 59 is introduced as a result of the formation of the screw 74. The threaded connection 62 with the midfoot 52 is relieved of this part of the tensile force, without the known from the prior art clip would have to be used.

In addition, a second screw 76 is provided, by means of which the profile body 58 is connected to the middle foot 52 by screwing. The screw 76, the profile body 58 and the metatarsus 52 thus form a further fastening configuration 77, which serves for the secure arrangement of the midfoot 52 on the profile body 58.

Fig. 7 shows a perspective view of the base 51 without representation of the soil. In particular, it can be seen that the outer jacket 53 is formed of vertical bars 78 and horizontal bars 79, wherein a lower grid bar 79 of the outer jacket 53 forms the tube 54.

The Fig. 8 shows an end 80 of the bottom cross member 59, which rests on the top 61 of the metatarsus 52. The bottom crosspiece 59 or the profile body 58 is formed from a formed metal sheet and in particular has a passage opening 81 for the screw 76. An inner diameter 82 of the passage opening 81 is formed so that the screw 76 can be easily inserted or screwed through the passage opening 81. The passage opening 67 has no internal thread in the illustration shown here, since the screw 60 has not yet been screwed in and consequently no thread has yet been formed. Furthermore, a depression 83 is formed in the region of the passage opening 67. The recess 83 is used for Stiffening of the later formed screwing and guiding the screw during assembly. An inner diameter 84 of the passage opening 67 is smaller than the external thread 72 of the screw 60.

Claims (14)

1. A pallet-like understructure (51), in particular for transport and storage containers for liquids, which are equipped with an inner container made of plastic, with a closable filling neck and a draining neck for connecting a tapping armature, wherein the understructure has an outer jacket (53) made of a metal grid or sheet metal, and a bottom (56) for supporting the inner container, corner feet and central feet (52) arranged between the corner feet as well as a bottom cross member (59), wherein at least the outer jacket and the bottom cross member are attached to at least two central feet, wherein the respective central foot (52), the outer jacket and the bottom cross member are coupled in a form-fitting fashion with the aid of a screw (60), wherein the screw reaches through clearance openings (65, 67) embodied in the outer jacket and in the bottom cross member,
   characterized in that
   the screw (60) is engaged with the bottom cross member (59) in a form-fitting fashion, wherein the clearance opening (67) in the bottom cross member is embodied for engaging with the screw, wherein an inside diameter (84) of the clearance opening (67) is smaller than an outside diameter (71) of the screw, in such a manner that a tensile force realized between the bottom cross member and the outer jacket can be transmitted via the screw.
2. The understructure according to claim 1,
   characterized in that
   the central foot (52), the outer jacket (53), the bottom (56) and the bottom cross member (59) are coupled in a form-fitting fashion with the aid of the screw (60).
3. The understructure according to claim 2,
   characterized in that
   the screw (60) reaches through clearance openings (65, 66) embodied in each instance in the outer jacket (53) and in the bottom (56).
4. The understructure according to claim 2 or 3,
   characterized in that
   a screw thread is embodied in the bottom (56), the screw (60) engaging with said screw thread.
5. The understructure according to one of the previous claims,
   characterized in that
   the bottom cross member (59) is realized from metal, and in that the bottom (56) is realized from metal or from plastic material.
6. The understructure according to one of the previous claims,
   characterized in that
   the clearance opening (67) of the bottom cross member (59) is embodied with a hollow (83).
7. The understructure according to one of the previous claims,
   characterized in that
   a screw thread (73) is embodied in the bottom cross member (59), the screw (60) engaging said screw thread.
8. The understructure according to one of the previous claims,
   characterized in that
   the screw (60) is engaged with the central foot (52) in a form-fitting fashion, in such a manner that a tensile force realized between the central foot and the outer jacket (53) can be transmitted via the screw.
9. The understructure according to one of the previous claims,
   characterized in that
   the bottom cross member (59) is coupled to the central foot (52) in a form-fitting fashion with the aid of a further screw (60).
10. The understructure according to one of the previous claims,
    characterized in that
    the central feet (52) are realized from a plastic material.
11. The understructure according to one of the previous claims,
    characterized in that
    a screw thread is embodied in the central foot (52), with which the screw (60) engages.
12. The understructure according to one of the previous claims,
    characterized in that
    two central feet (52) facing each other are coupled to each other via the bottom cross member (59).
13. The understructure according to one of the previous claims
    characterized in that
    there is a bracket, which reaches around the bottom cross member (59), around the bottom (56) and around a peripheral edge of the outer jacket (53), wherein the screw (60) penetrates the legs of the bracket.
14. A transport and storage container for liquids, which is equipped with an inner container made of plastic, with a closable filling neck and a draining neck for connecting a tapping armature, wherein the inner container is arranged on a bottom of a pallet-like understructure (51) according to one or more of the claims 1 to 13.

Images