DE4133270A1 - LID TRAY - Google Patents

Abstract

The invention concerns a drum with a lid, made of thermoplastics material and intended to hold, in particular, dangerous liquids or solids. In order to improve the securing of the lid, which is held in place with an overlapping clamping ring (18), special locking elements (52, 54) are fitted on the drum body (10) and/or on the lid (20), the barb-like edges of the locking elements physically interlocking with the upper and/or lower sides (30, 32) of the clamping ring (18).

Description

The invention relates to a lid barrel made of thermoplastic Plastic to hold dangerous liquid or solid contents according to the features in the preamble of Claim 1.

Such lid drums are generally known, so at for example from the German utility model DE-GM 86 32 037.

Even more than with sheet drums with comparatively very little There is a small bung hole in a lid barrel with a large one Barrel opening the risk that this in the event of a barrel crash e.g. B. when falling over a stacked drum stack, un becomes tight and the possibly dangerous liquid Content can leak.

When a liquid-filled one falls The barrel lid becomes the barrel lid under the surge pressure of the filling material is pulled from the barrel body, the barrel is thereby leaks and loses contents. With known older Kon structures with segmented cover flange and locking segments ten on the barrel body for a tension wire lock, the one Type locking of the barrel lid with respect to the barrel body the segmented one turns out to be Flange of the barrel lid in the event of a barrel crash as a rule weakest link. It happens even at low fall heights to leaks. For this reason So far, none of the known constructions with segmented lid in practice.

In general, barrels are used to determine those drop heights he or discharge height at which they still remain tight,  certain drop tests and are based on their more or less good sealability only for be agreed dangerous or less dangerous fillers approved by the regulatory authority.

Standard lid drums filled with liquid remain with the classic side fall or side throw only up to a fall height of approx. 1, 20 m tight, with a larger fall leaks occur regularly at high altitudes.

If it were now attainable that a lid barrel a case height of approx. 1.50 m undamaged, d. H. without leaking to who that survives in a reproducible way, that would be it a tremendous success and would have a variety of possibilities Avoid damage that is harmful to the environment help.

The present invention is based on the finding that that when hitting the ground at the moment of the highest Surge pressure inside the barrel at the point of contact with the floor selectively a radially inward force on the Clamping ring and the flange rings overlapped by it on Edge of the lid and the barrel wall. Short term the clamping ring causes it to be viewed in cross-section related to the barrel body an approximately egg-shaped or ellip to take a table shape. In the side areas to the right and left of the point of contact Radius of the clamping ring significantly reduced and in the As a result, these areas spread apart slightly tapered leg of the clamping ring white ter on. At the same time this goes in these areas Contact pressure of the clamping ring on the jacket flange and Cover flange or the contact pressure of the top of the barrel ge lost the cover gasket; the clamping ring can lead Retain any kink damage and the drum is leaking.

It is therefore an object of the present invention to special design measures the radial load capacity of the clamping ring closure of a lid barrel and thereby the danger of pulling off a drum lid to reduce the barrel body when dropping, and a ver better tightness of the barrel overall, even with larger ones To reach heads.

This is according to the invention with those in the labeling part of claim 1 features achieved. Characterized in that the barrel body or the barrel lid with Verrie Gelungselemente is provided in the closed state form-fitting of the clamping ring or its legs can be reached behind or stand against them from the outside (project), the legs of the clamping ring are in axi fixed or prevented from spreading, so that the locking force acting on the barrel lid is not is lost and the barrel is on even at higher heights every point of the barrel circumference remains tight.

When opening the clamping ring lock by pressing or The diameter of the Clamping ring enlarged accordingly, so that a removal of the clamping ring and barrel lid without obstruction by the Locking elements is easily possible. By the still uninterrupted on its outer circumference continuous or all-round closed contour having the jacket flange, the high inherent rigidity remains speed of the barrel body at the top of the barrel or at the barrel opening fully preserved. In the construct according to the invention tion also keeps the flange on the drum lid stable continuous contour, which significantly with the radial stiffness of the closed lid barrel contributes.

In an embodiment of the invention it is provided that the outer wall of the barrel body above the jacket flange corresponding number of breakthroughs in correspond to the outer ring part of the drum cover  de projections with serving as a locking element Snap cams are formed by the upper leg of the clamping ring can be gripped behind or under are tangible.

Important with the new construction with mutual Ver Locking the barrel lid and barrel body using the clamp ringes is the fact that the clamping ring through on the barrel body-mounted locking cams form-fitting from the outside against his thighs against spreading (in barrel lengthways direction) is blocked. This in turn gives it increased radial rigidity in the lid / barrel mouth area of the Lid barrel in the event of a barrel crash.

With the lid drums designed according to the invention is now a greater drop height of about 1.50 m and above Reachable where the barrels are still safe stay tight. For example, in the Practice quite common case that when loading or Unloading drums on the back of a truck fall over, roll off the bed and fall to the floor, the new lid drums are no longer leaking.

In a further embodiment of the invention, that on the barrel lid or its outer ring part between breakthroughs in the same in the locked state Chen level as the locking cams on the outer wall the barrel body also formed locking cam segments are, which from the upper leg of the clamping ring are available. The locking cam segments on the edge of the lid prevent in cooperation with those on the barrel body arranged locking cams in their intermediate areas spread the upper clamping ring leg. This is the upper clamping ring leg over the entire barrel circumference in Barrel longitudinal direction blocked or fixed.  

In a further embodiment of the invention, that below the jacket flange on the outer wall the barrel body a circumferential locking ring as a locking element is formed, which of the lower leg the clamping ring can be gripped behind.

This measure also makes the lower leg continuously against the circumference of the barrel an attempt to expand hampers and fixes.

In a preferred manufacturing method, the lid barrel body with the locking cams on its outer wall one operation by extrusion blow molding inside made half of the blow mold. Through partial thicknesses The thermoplastic hose can be used to control the ring nozzle shaped preform with different partial wall thick extruded so that in the final blown NEN barrel body no disadvantageous pockets, niches or Depressions on the inside of the barrel body arise in which were attached later when the barrel was emptied tender barrel content could remain.

According to a different manufacturing method with multiple work steps, it is possible that the jacket flange and the Locking cams and, if applicable, the lower circumferential locking ring a band-shaped carrier part as a separate injection molded part are prefabricated and the band-shaped support part Form fit or / and befe by joining on the barrel body is increasing.

The injection molded part can be before the extrusion of the tubular preform into the still open Blow mold halves used and during the blowing process with the Outer wall of the barrel body are welded or that Injection molded part can after a finished barrel body put on sluggishly or z. B. be shrunk.  

In a further preferred embodiment variant of the lid barrel according to the invention it is provided that at the bottom of the cover flange in extension of the ring part at equal intervals and the number of in the Sheath flange formed breakthroughs accordingly several tongue-shaped approaches with at the lower end arranged and protruding outward cams are seen, which in the attached state by the Openings protrude through the jacket flange and from below ren legs of the clamping ring can be reached behind. This essentially locks the lower clamping ring thigh the barrel lid edge against the jacket flange of the Barrel body. Advantageously, on the ring part Barrel lid additionally formed an upper locking ring, which grips behind from the upper leg of the clamping ring is bar, so that the upper clamping ring leg umlau is fixed.

The un are essential in this embodiment interrupted circumferential or continuous stable jacket flange of the barrel body and the massive cover flange for the radial rigidity in the area of the large barrel mouth of the lid barrel.

There are already from DE-PS 33 23 550 and DE- PS 34 00 059 lidded barrels known in which at the bottom Edge of the barrel lid with tongue-shaped shoulders formed locking cams are provided. These barrels white however, disadvantageously a segmented Jacket flange on the barrel body and partially a segmented lid flange on the drum lid. This is the man telflansch, so to speak, only on half the barrel circumference existing and in the between the segments The clamping ring lies hollow on the barrel body between regions or on the edge of the lid and is even more at these points at risk of buckling and spreading. That's the way it is Mouth area of these known lids at one  comparatively rigid tension ring and very weak soft against radial forces and it will be fine leaks occur at low head.

Due to increased static internal pressure (e.g. with external storage of such barrels under intense sunlight lung) or by a surge pressure occurring at the barrel the barrel lid bulges outward or from the top. This reduces the diameter of the drum lid at high prevailing tensile forces the segment pieces from Dec kelflansches. Bend the cover flange segment pieces due to lack of bending stiffness / torsional stiffness down and there is a great risk that the Pull the flange segments out of the clamping ring or the Barrel cover at least at a peripheral point of the barrel body is withdrawn and the barrel content can leak. According to a further embodiment according to the invention provided that through the openings in the ring part of the barrel cover protruding cams on the projections the barrel wall and through the openings in the jacket flange protruding tongue-shaped approaches with the molded ten locking cams alternately on the circumference of the Barrel body are arranged and in cooperation with the overlapping or behind the clamping ring a umlau interlocking interlocking interlocking educate system. By combining the different Locking options can make the Dec kelfasses also improved for larger heads will.

Finally, according to another advantageous one Embodiment of the invention can be provided that the Jacket flange with the openings and the top catch cam as well as the lower one, if necessary  spaced locking cams on a ribbon-shaped carrier are prefabricated as a separate injection molded part and the band-shaped carrier part by positive locking or / and is attached by joining on the barrel body. This allows the rather smaller components of the Locking systems on the band-shaped carrier part as well as the barrel lid manufactured by injection molding are, while for the barrel body production only egg ne simple blow mold is needed.

The invention is based on in the drawing Solutions illustrated embodiments explained in more detail tert and described. Show it:

Fig. 1 detail of the upper portion of a Deckelfas ses invention in longitudinal sectional view,

Fig. 2, the lidded barrel according to FIG. 1 by one piece of a segment in the circumferential direction,

Figure 3 is a further inventive kelfaß Dec.,

Fig. 4, the lidded barrel according to FIG. 3 offset by a segment piece in the circumferential direction,

Fig. 5 shows another dec kelfaß according to the invention and

Fig. 6, the lid barrel according to FIG. 5 offset by a segment piece in the circumferential direction.

In Fig. 1, the reference numeral 10 denotes a Deckelfaßkör by a distance (approx. 20 mm to 60 mm) un below the upper edge of the barrel body 12 on its outer wall, an upset from the material of the barrel wall massive jacket flange 16 as a lower counter bearing for egg nen overlapping or under-clamping ring 18 . The jacket flange 16 is continuous and stable throughout.

On the barrel body 10 , a barrel lid 20 is placed, which in its circumferential area has a ring part 22 , which extends vertically or longitudinally in the barrel, covering the upper barrel body edge 12 , on the lower edge of which a radially outwardly projecting and also circulating the continuous, uninterrupted stable lid flange 24 is designed as an upper counter bearing for the clamping ring 18 .

The clamping ring 18 has an upper leg 30 and a lower leg 32 , which are formed slightly obliquely inwardly ver, so that there is an almost U-shaped or trapezoidal cross-sectional shape. In the closed state of the jacket flange 16 and the cover flange 24 are pulled or clamped against each other by the overlapping clamping ring 18 against each other, as a result of which the upper barrel edge 12 is pressed against the seal inserted into the barrel cover 20 and thus the cover barrel is closed in a gas-tight and liquid-tight manner.

In the outer ring part 22 of the barrel lid 20 , a plurality of openings 26 (recesses / windows) which are evenly distributed over the circumference are provided in the lower region, the lid flange 24 continuing to run continuously closed. The longitudinal section of Fig. 1 is ge rade therethrough defined by such cut-out 26. A corresponding number of the openings 26 are formed on the outer wall of the barrel body 10 above the jacket flange 16 corresponding projections 34 with radially outwardly projecting locking cams 36 serving as a locking element.

In the attached state, the projections 34 of the barrel wall in the openings 26 with the ring part 22 of the barrel cover and the locking cams 36 protrude outwards through the openings 26 and are positively engaging behind the upper leg 30 of the clamping ring 18 or are opposed from the outside the leg 30 on. Since the barrel lid 20 and barrel body 10 are positively locked against each other by the radially engaging clamping ring 18 and the barrel can hen significantly higher internal pressure values or voltage peaks of the short-term Schwalldruc kes during ground impact of a falling barrel without this leaking.

The length in the circumferential direction of an opening 26 in the barrel lid 20 or a barrel jacket projection 34 with Rastnoc ke 36 (these are about 3 mm shorter than an opening) be for a large-volume 220 l lid barrel between 30 mm and 120 mm, preferably about 60 mm.

In Fig. 2, the lid barrel from Fig. 1 is shown offset by the length of egg nes breakthrough in the circumferential direction, ie a longitudinal section through the closed Zwischenbe rich of the ring member 22 of the barrel lid 20th

Here the barrel wall is set back somewhat or is formed without a projection. So that not only the upper leg 30 , but also the lower leg 32 is positively prevented from spreading axially, a circumferential locking ring 40 as a fixed contact edge (stop) is formed on the outer wall of the barrel body 10 below the Mantelflan cal 16 , which from the lower Clamping ring leg 32 can be gripped behind or stands firmly against it. The outer ring member 22 of the barrel lid here also has locking cam segments 38 in the area between the openings 26 , which are in the closed state in the same height plane as the locking cams 36 and prevent evasion or spreading of the clamping ring.

The plastic barrel shown in Fig. 1 and Fig. 2 is produced in one step in the blow molding process. The latching cams 36 can be upset and shaped at the same time as the mas sive jacket flange 16 by means of a correspondingly formed molded slide directly from the material of the barrel wall. The drum cover 20 is preferably made of hard plastic and is produced by injection molding. It is no problem to shape the openings 26 in the ring part 22 .

In Fig. 3 and Fig. 4 1 2 is a lidded barrel but produced in a different way corresponding as shown in Fig. And Fig. Is.

The barrel body 10 has a slightly curved retracted inlet in the area below the barrel top of the 12 . In this area, an annular injection molded part is attached to the barrel body 10 . The injection molded part has a band-shaped Trä gerteil 42 on the inside of the barrel body, on which the upper locking cams 36 (here only in segments according to the openings 26 in the barrel lid ring part 22 ), in the middle of the continuous circumferential jacket flange 16 and the locking ring 40, which is also continuous, are formed at the bottom. The injection molded part is prefabricated separately and has a variety of Aussparun conditions 44 between the locking cams 36 and the jacket flange 16 and recesses 46 in the jacket flange 16 itself to save material. In the recesses 44 , 46 a plurality of ribs in the axial direction (longitudinal direction) or spaced apart in the circumferential direction are provided, so that the intermediate material is saved without loss of strength. In Fig. 4 it is shown that the massive cover flange 24 of the barrel cover 20 can be provided with corresponding ribbed, annular circumferential savings 48 to save material.

To make this barrel, blow molding is sufficient Barrel body a simpler blow mold without a slide valve, however, the injection molded ring part must be prefabricated separately tigt and placed on the outer barrel wall and through Form-fit, joining, gluing or welding who fastened the.

In the lid barrel shown in Fig. 5 and Fig. 6, a further variant of locking the Faßdec angle 20 relative to the barrel body 10 or its jacket flange 16 by the radially inserted in locking elements 52 engaging clamping ring 18 is realized. Here, the outer flange 16 is also formed solidly in its outer contour, but directly on the Faßwan extension are evenly distributed over the circumference of several slot-like openings 28 (windows) incorporated. These openings 28 can, for. B. are formed or molded directly into the blow mold by means of corresponding tongue extensions on the mold slide.

Corresponding to the number and the width (or length in the circumferential direction) of the openings 28 in the jacket flange 16 , corresponding tongue-like sentences 50 are provided at the lower edge of the cover flange 24 in extension of the ring part 22 , which cover in the mounted state of the barrel through the openings 28 are inserted through and protrude a bit below. At the protruding ends of the tongue-like approaches 50 serving as locking elements serving locking cams 52 are formed, which can be reached from the lower leg 32 of the clamping ring, or from the outside as a stop against this pending and prevent spreading.

As indicated only in dashed lines in FIG. 6, can be formed on the barrel wall between the openings 28 below the jacket flange 16 seg mentally or correspondingly spaced apart unte latching cams 56 . In order to prevent the same time also the upper leg clamping ring 30 at a spreading, there is a circumferentially-imaginary upper locking ring 54 from outside or above against the leg 30 at.

Also in this locking system, there is the possibility of prefabricating the jacket flange 16 with the openings 28 as a separate injection-molded ring part and attaching it to the barrel body.

In a combination of the barrel variants shown above, it is easily possible that the through the openings 26 in the ring portion 22 of the barrel cover 20 projecting Rastnoc ken 36 and through the openings 28 in the flange 16 projecting tongue-shaped approaches 50 with the molded locking cams 52 several times alternately are arranged on the circumference of the barrel body 10 and in cooperation with the engaging clamping ring 18 form a circumferential, form-fitting interlocking locking system.

This barrel version can also be used on the barrel body attached injection molded ring part with the different ver locking elements can be realized.

From the above description it is understood that a lid barrel according to the construction according to the invention considerably higher drop heights or fall heights can stand without leaking. It is therefore for the Transport of dangerous liquid or solid goods particularly suitable.  

Reference number list

10 barrel bodies
12 barrel edge
14 seal
16 jacket flange ( 10 )
18 tension ring
20 drum lids
22 ring part ( 20 )
24 cover flange ( 20 )
26 breakthrough in ( 22 )
28 breakthrough in ( 16 )
30 upper leg ( 18 )
32 lower leg ( 18 )
34 lead in ( 10 )
36 locking cam from ( 34 )
38 locking cam segment on ( 22 )
40 locking ring on ( 10 )
42 carrier part
44 recess in ( 42 )
46 recess in ( 42 )
48 recess in ( 24 )
50 approach to ( 24 )
52 locking cams on ( 50 )
54 snap ring on ( 22 )
56 locking cams on ( 10 )

Claims (10)

1. Lid barrel made of thermoplastic material for recording me dangerous liquid or solid contents

• - With a barrel body ( 10 ), the spacing below the upper edge of the barrel body ( 12 ) at its Außenwan tion an uninterrupted, continuous continuous stable jacket flange ( 16 ) as a lower counter bearing for
• - Has an overlapping or underneath clamping ring ( 18 ) with an almost U-shaped cross section, and with
• - A barrel lid ( 20 ) which in the peripheral region has an upper barrel body edge ( 12 ) covering, verti cal extending ring member ( 22 ), on the lower edge of which a radially outwardly projecting, continuously continuous, stable lid flange ( 24 ) as the upper Counter bearing for the clamping ring ( 18 ) is provided,

characterized in that the outer ring part ( 22 ) of the barrel cover ( 20 ) and / or the jacket flange ( 16 ) on the outer wall of the Faßkör pers ( 10 ) evenly distributed over the circumference through openings ( 26 , 28 ) for receiving locking elements ( 36 , 52 ), which protrude through the openings ( 26 , 28 ) when the barrel cover ( 20 ) is in place and, in the locked state of the clamping ring ( 18 ), can be positively gripped by its upper and / or lower legs ( 30 , 32 ). (all figures) 2. Lid barrel according to claim 1, characterized in that on the outer wall of the barrel body ( 10 ) above the jacket flange ( 16 ) in a corresponding number to the openings ( 26 ) in the outer ring part ( 22 ) of the Fassdec angle ( 20 ) corresponding corresponding projections ( 34 ) are designed with locking cams ( 36 ) serving as a locking element, which can be positively gripped behind by the upper leg ( 30 ) of the clamping ring ( 18 ). ( Fig. 1, 3) 3. Lid barrel according to claim 1 or 2, characterized in that on the barrel lid ( 20 ) or its outer ring part ( 22 ) between the openings ( 26 ) in the same height level in the closed state as the locking cams ( 36 ) on the outer wall of the Barrel body ( 10 ) also locking cam segments ( 38 ) are formed, which of the upper leg ( 30 ) of the clamping ring ( 18 ) are behind bar. ( Fig. 2, 4) 4. Lid barrel according to claim 1, 2 or 3, characterized in that below the jacket flange ( 16 ) on the Außenwan extension of the barrel body ( 10 ) a circumferential locking ring ( 40 ) or spaced locking cams ( 56 ) is formed as a fixed contact edge / are which of the lower leg ( 32 ) of the clamping ring ( 18 ) can be reached behind. ( Fig. 1, 2, 3, 4) 5. Lid barrel according to claim 1, 2, 3 or 4, characterized in that the jacket flange ( 16 ) and the locking cams ( 36 ) and if necessary the circumferential locking ring ( 40 ) on a band-shaped carrier part ( 42 ) are prefabricated as a separate injection molding and the band-shaped carrier part ( 42 ) is fastened by positive locking and / or by joining on the barrel body ( 10 ). ( Fig. 3, 4) 6. Lid barrel according to claim 1, 2, 3, 4 or 5, characterized in that below the lid flange ( 24 ) in extension of the ring part ( 22 ) at regular intervals and the number of openings formed in the jacket flange ( 16 ) ( 28 ) correspondingly a plurality of tongue-like lugs ( 50 ) are provided with locking cams ( 52 ) arranged at the lower end and projecting outwards, which protrude in the attached state through the openings ( 28 ) in the jacket flange ( 16 ) and from the lower arm ( 32 ) of the clamping ring ( 18 ) can be reached behind. ( Fig. 5) 7. Lid barrel according to one of the preceding claims 1 to 6, characterized in that on the ring part ( 22 ) of the barrel lid ( 20 ) an upper locking ring ( 54 ) is additionally formed, which engages behind the upper leg ( 30 ) of the clamping ring ( 18 ) is cash. ( Fig. 5, 6) 8. Lid barrel according to one of the preceding claims 1 to 7, characterized in that the through the openings ( 26 ) in the ring part ( 22 ) of the barrel lid ( 20 ) projecting locking cams ( 36 ) on the before jumps ( 34 ) of the barrel wall and through through the breakthroughs ( 28 ) in the jacket flange ( 16 ) protruding tongue-shaped approaches ( 50 ) with the molded locking cams ( 52 ) are arranged alternately on the circumference of the barrel body ( 10 ) and in cooperation with the clamping ring ( 18 ) engaging behind a circumferential form interlocking interlocking system. 9. Lid barrel according to one of the preceding claims 1 to 8, characterized in that the jacket flange ( 16 ) with the openings ( 28 ) and the upper locking cams ( 36 ) and optionally the lower, spaced-apart locking cams ( 56 ) on a band-shaped carrier part ( 42 ) are prefabricated as a separate injection molded part and the band-shaped carrier part ( 42 ) is fastened to the barrel body ( 10 ) by positive locking and / or by joining.