DE202008013413U1 - drum cover - Google Patents

Abstract

drum cover (10) made of thermoplastic material for a lidded barrel Storage and transport of particularly dangerous particulate, pasty or liquid Products to be filled by means of a clamping ring (12) is mounted on the barrel body of a lidded barrel, wherein the U-shaped clamping ring (12) on the one hand on the outer edge the drum lid (10) arranged downwardly open U-shaped Cover edge (18) overlaps and on the other hand one after protruding outwards, at the upper rim of the drum arranged flange edge engages below and the drum cover (10) in Closure state gas- and liquid-tight on the barrel opening fixed, wherein the drum cover (10) between a flat cover disc (24) and the outer U-shaped lid edge (18) a circumferential groove as engagement groove (20) for drum gripper tools characterized in that that within the circumferential engaging groove (20) at least three raised, from Nutengrund (22) high support points are created whose Surface as support surface (or support point) for the lower edge of the lower ring piece (34) a stacked lid (10) in the same height level lie.

Description

The The invention relates to a drum lid of thermoplastic material for a lidded barrel for storage and transport particularly dangerous particulate, pasty or liquid products. The drum lid is fixed to the lid body by means of a clamping ring attached. This overlaps the U-shaped clamping ring one arranged on the outer edge of the barrel lid, down open U-shaped edge of the lid and engages on the other Side outwardly projecting, at the upper edge of the barrel opening arranged flange edge and fixes the barrel lid in the closed state gas and liquid tight on the barrel opening. Of the Drum cover points between a flat cover disc and the outer one U-shaped lid edge has a circumferential groove as engaging groove for drum gripper tools. Furthermore, the barrel lid with one central or two laterally located, deeper lying Spit troughs (= bung housing) with optionally arranged therein gas- and liquid-tight lockable bung hole opening be equipped. The downwardly open lid edge comprises an outer Cover flange and a concentric extending inner cover flange, on located at its lower end in a connecting region of the flat groove bottom of the circumferential engagement groove connects. Below this connection area closes, so to speak on the underside of the lid a circumferential ring piece in the closed state by a piece in the mouth opening protrudes the lid barrel body. This ring piece should be as close to the inside of the wall as possible Cover body abut. The inner cover flange is not completely rectilinear, but with one Bend (turn to the outside) provided.

Problem: The invention is based on the following problem:
Such drum lids for large-volume lidded kegs with a capacity of about 120 to 220 liters themselves have a comparatively large diameter (about 450 mm to 580 mm), they are produced by injection molding and consist of hard plastic, a so-called injection-molded HD-PE ( High Density Polyethylene), which is processed at high temperatures in the molten state (thin liquid) or injected into a closed injection mold and has a comparatively low elasticity when cold and is therefore very rigid. In contrast, the HD-PE, which is expanded in the blow molding from a heated preform (hose) in a blow mold into a hollow body and pressed by compressed air against the inner wall of the blow mold, a higher elasticity and is also elastically deformable in the cooled state. The barrel lids produced by injection molding are removed from the injection molding machine immediately after the manufacturing process in a still hot, not cooled state and stacked in large stacks. Since the outer diameter of the lower barrel-ring piece is slightly larger than the inner diameter of the inner cover flange and thus does not rest circumferentially on the groove bottom of the engagement groove, the lid in the stacking no defined support surface or support points and are each slightly inclined at an angle Position - on one side on the groove base and on the opposite side on the outwardly bent (bent) portion of the inner cover flange. This results in the cooling of the lid and even after prolonged rest in the stack disadvantageously to the fact that the lid warp and bend.

It The object of the present invention is to eliminate these disadvantages and a flat support of the stacked lids - in particular for cooling directly after the manufacturing process - too guarantee.

These The object is achieved according to the invention that within the circumferential engagement groove at least three raised points of support, which are raised from the bottom of the groove, are created, whose surface serves as a bearing surface (or support point) for the lower edge of the lower ring piece of a stacked Lids are in the same height level. By the defined Support points in the same height level is a straight edition the lid ensures cooling and long-term stacking, so that no distortion and bending of the lid occur more can. Due to the even support of a stacked Lids on a stacked lid, this is also from above held in a level altitude or down pressed and a one-sided bending or warping the stacked lid is prevented. This is the top Cover of a lid stack expediently - at least during the cooling phase of the freshly prepared Cover - with z. B. a flat metal plate loaded, so that a good heat dissipation is guaranteed and even the top lid can not be forgiven.

In an embodiment of the invention, it is provided that the support points are formed by a plurality of narrow, radially extending ribs, the upstanding from the groove bottom of the engaging groove on the outside of the inner cover flange. In this simple way, the support points can be realized with the least amount of material. It is further contemplated that the radially extending ribs are bounded on the inside approximately in the half of the engaging groove and reach up to about the bend in the inner cover flange, which is about a height that is half the depth of the one gripping groove corresponds. It is clear that these ribs do not serve the purpose of a lid reinforcement, but should be kept as small and short as possible in order to meet the purpose of a defined lid support for a similar stacked lid.

In Another embodiment of the invention is provided that the single ribs by an arc length of larger equidistant from each other by 30 °. In other words, there should not be too many ribs, a number of a maximum of about 12 is considered sufficient to a to ensure even bearing surface without intervention hamper the drum gripper tools.

The The invention will be described below with reference to a schematic in the drawings illustrated embodiment explained in more detail and described. Show it:

1 a top view of a drum lid according to the invention with stacked ribs,

2 a partial sectional view through the edge of a barrel lid

In 1 is with the reference number 10 an inventive barrel lid referred to by means of a clamping ring 12 Gas- and liquid-tight on a corresponding large-volume lidded drum of the known as "VANGUARD lidded barrel" type with a volume size of about 150 to 220 liters is attached, as it is z. B. from the International Publication WO 96/08416 is known.

For a simple filling with liquid product is the drum lid 10 with two diametrically opposed lid spills 14 . 16 equipped in size 2 inches and ¾-inch inches. But it can also be provided that only a single laterally or centrally arranged bung closure z. B. is formed in the size of 3 inches. The clamping ring 12 overlaps with its upper leg one on the outer edge of the barrel lid 10 arranged, downwardly open U-shaped lid edge 18 , on which there is an engaging groove inside 20 with deeper groove bottom 22 followed. On the other side engages under the clamping ring 12 an outwardly projecting, arranged on the upper rim of the rim flange and fixes the drum lid in the closed state gas and liquid tight on the barrel opening.

The engaging groove 20 on the edge of the lid encloses on the inside a again higher central cover disc 24 , in which - as in 1 is shown - yet another elasticity-enhancing annular groove can be provided.

Inside the engagement groove 20 are several short, radial "stack" ribs 26 arranged. To ensure a secure support should be at least three evenly distributed over the circumference of such "stack" ribs 26 to be available.

In 2 are further details of a drum lid according to the invention 10 clarified. On the outer circumference is the U-shaped lid edge open at the bottom 18 formed, in the a lid seal 28 is inserted. The lid edge 18 has an outer cover flange 30 and an inner cover flange 32 on. This inner cover flange has approximately at half its height still a bend (turn), down to the groove bottom 22 towards a diameter reduction represents. As an extension of the inner cover flange 32 closes below the groove bottom 22 a lower ring piece 34 on, which in turn is also designed slightly smaller in diameter. This lower ring piece 34 should rest as close as possible to the correspondingly shaped inner wall of the drum opening with the drum lid attached and additionally support the lid in the event of lateral loads. With a distance of about 20 mm (measured radially inwards) is to reinforce the drum lid below the Eingreifnut 20 another inner ring piece 36 educated. Above the inner ring piece 36 closes - from the bottom of the groove 22 rising - a diagonally conical connecting piece 38 to the higher central cover disc 24 at. In this way, the inner cover flange form 32 and the conical connector 38 above the bottom of the groove 22 and the lower ring piece 34 with the inner ring piece 36 a very stable H-shaped cross-sectional profile of the lid edge region. Through the bent outward inner cover flange 32 and the conical connector 38 is the H-profile at the top as Eingreifnut 20 widened trapezoidal. Within the engagement groove 20 are the narrow, radially extending ribs 26 arranged from the bottom of the groove 22 high outside on the inner cover flange 32 are connected. Characterized in that the radially extending ribs 26 with a width of about 2 mm on the inside approximately in half of the engaging groove 20 are limited (rib length about 10 mm), no closed compartments are formed, in which rainwater could accumulate. Due to the internal flow, any accumulated rainwater can be easily removed by tilting the barrel once. For optimal stacking, there should be a multitude of at least six ribs 26 within the engaging groove 20 be arranged. In the present embodiment ( 1 ) Ten ribs are formed in the barrel lid. The fact that the ribs with a rib height of about 15 mm upwards only to about the bend in the inner cover flange 32 pass (Height = half the depth of the engagement groove), the engagement of the upper barrel gripper claw of a barrel gripper tool is not hindered.

10

drum cover

12

clamping ring

14

Bunghole 2 ''

16

Bunghole opening ¾ ''

18

U-shaped cover edge

20

Engaging groove

22

groove base

24

central flat cover disc

26

Stacking rib

28

sealing ring

30

outer cover flange

32

internal cover flange

34

lower Ring piece (outside)

36

inner Ring piece (below)

38

conical connector ( 22 / 24 )

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - WO 96/08416 [0010]

Claims (5)

Drum cover ( 10 ) of thermoplastic material for a lidded drum for storage and transport of particular dangerous particulate, pasty or liquid products, by means of a clamping ring ( 12 ) is mounted on the barrel body of a lidded barrel, wherein the U-shaped clamping ring ( 12 ) on the one hand on the outer edge of the barrel lid ( 10 ), downwardly open U-shaped lid edge ( 18 ) engages and on the other hand engages under an outwardly projecting, arranged on the upper edge of the drum rim flange and engages the drum lid ( 10 ) fixed in the closed state gas and liquid-tight on the barrel opening, the cask cover ( 10 ) between a flat cover disc ( 24 ) and the outer U-shaped lid edge ( 18 ) a circumferential groove as engagement groove ( 20 ) for Fassgreiferwerkzeuge, characterized in that that within the circumferential engagement groove ( 20 ) at least three sublime, from Nutengrund ( 22 ) upstanding support points are created whose surface as a bearing surface (or support point) for the lower edge of the lower ring piece ( 34 ) of a stacked lid ( 10 ) lie in the same height level. Lid according to claim 1, characterized in that that the support points by a plurality of narrow, radially extending ribs ( 26 ) formed by Nutengrund ( 22 ) of the engaging groove ( 20 ) high on the outside of the inner cover flange ( 32 ) connect. Lid according to claim 1 or 2, characterized in that the radially extending ribs ( 26 ) inside approximately in the half of the engaging groove ( 20 ) are limited and upwards until about the bend in the inner cover flange ( 32 ) (height = half the depth of the engagement groove). Lid according to claim 1, 2 or 3, characterized in that the individual ribs ( 26 ) are spaced apart by an arc length greater than or equal to 30 °. A lidded drum according to claim 1, 2, 3 or 4, characterized in that a plurality of at least six ribs ( 26 ) within the engaging groove ( 20 ) are arranged.