DE9112544U1 - Plastic bucket and lid with collar-shaped spacer and concealed clamp closure - Google Patents

Description

Plastic bucket and lid with collar-shaped spacer and concealed clamp closure

Plastic buckets are used in many areas of industry and trade. Automation and the development of fully automated production lines with control stations also place special demands on the packaging materials - such as buckets and lids. For example, a bucket is known from utility model application 8335866 which can be centered in a stack and used in robot magazines in an aligned manner. In the bucket lids according to utility model application 83161777.3, centering bars enable good magazine guidance. The disadvantage of such packaging buckets and lids is the free accessibility of the bottom locking segments of the lid and bucket. During transport, the pallet stacks often shift and the lids are knocked off.

Another disadvantage is the empty buckets, because the gaps between the bucket collars require special mechanisms for lifting and securing the handles. Furthermore, these hollow spaces are disadvantageous as dirt corners - especially in the food sector.

Since high-tight closures are required in most cases, damage to the edge of the bucket and thus leaks are always possible when buckets are stacked. The spacers on conventional buckets put pressure on the important closure parts.

The present invention is based on a bucket and lid that avoids the above-mentioned disadvantages because the bucket has a collar running around the top, which acts as a spacer and covers the closure part of the bucket all around when the buckets are stacked one inside the other. The closure part cannot be damaged and the sealing closure bead is not

H γ, S, -,

deformed by spacers. The closed collar prevents the carrying handles from hooking under and jamming.

The lid according to the invention has the same outer diameter as the bucket collar and is flush. This means that there are no starting points where the lid could be accidentally knocked off. The bucket and lid form a smooth cylindrical outer surface. The outer contours of the bucket and lid cannot be opened without additional handling. The bucket collar has a concealed grip recess in one or more places. If a safety segment is deliberately destroyed and pressed in, the lid can be gripped and released via a perforation. Arranged below the grip recess are locking ribs which, when the buckets are stacked one inside the other, dip into the grip recess and prevent the buckets from rotating radially in the stack. The carrying handles are therefore always aligned in the same place. With a centering shoulder on the bucket and a centering bar on the lid, the bucket and lid are fixed and centered on filling systems and are therefore easy to handle on all roll-on or press-on sealing machines. It is also easy to cover and close the bucket by hand. The special arrangement and position of the individual wall elements and the interaction of a sealing lip with a sealing groove result in a highly sealing closure. In order to enable the greatest possible tolerances in bucket and lid production, the bucket lid also has so-called latches, which represent a high-strength, mechanically resilient closure.

The actual sealing and closing element of the lid is also provided by the centering bar on the lid

protected and is located in the deeper inner part of the lid.

The invention is explained in more detail using an embodiment. Shown are:

Figure I shows a partial section through a bucket closed with a lid.

Figure II shows a partial section through the bucket bulge.

Figure III is a view in direction A according to Figure

Figure IV

a plan view in direction B according to Figure iV. 20

Figure V shows a partial section through two buckets stacked one inside the other

In Figures I-V, the numbers have the following definitions:

1 bucket wall

2 Pressure flange

3 Sealing lip

4 Centering shoulder

5 collar

6 Shelter

7 Rib

8 locking rib

9 Grip recess

10 Fuse segment

11 Perforation

12 Bucket latch
5

20 lids

21 Lid area

22 Inner web

23 Sealing groove

24 Head flange

25 outer bridge

26 Centering bar

27 Lid latch

When manufacturing plastic buckets and lids, they are stacked one inside the other. The centering bar 26 of the lid 20 dips over the outer bar 25 and centers the lids one under the other. Precisely straight stacks are formed. The support of the individual lids on the head flange 24 of the lid surface 21 and the centering bar 26 protects the sealing groove 23. There is a small dimensional play between the outer bar 25 and the centering bar 26, so that they can be easily unstacking.

When buckets are stacked one inside the other, they slide into one another until the lower edge of the collar 5 hits the upper edge of the collar 5 at the transition of the centering shoulder 4. The height of the collar 5 is determined by the proportion of the conicity of the bucket to the thickness of the wall 1. The collar 5 is designed as a complete, all-round closed wall. The total weight distribution of the buckets is carried out all around on the bucket bulge or on the collar 5 and the centering web 4. There is a hollow space 6 between the collar 5 and the wall 1. When buckets are stacked

The position of the sealing lip 3 is protected in this area. The sealing lip 3 cannot be damaged. The bucket bead has ribs 7 for reinforcement, which are connected to the collar, the centering shoulder 4, the pressure flange 2 and the wall 1. Since the collars 5 are stacked on top of each other, the bucket stack forms a closed cylindrical outer surface Y. This enables perfect transport and handling on slides or in magazines.

In particular, there are no cavities or recesses in which dust or dirt particles can get stuck. The collar 5 and the centering recess 4 are interrupted in one or more places offset inwards and form recessed grips 9. These recessed grips 9 enable the lid 20 to be removed because a grip surface is formed under the centering web 26. When the securing segment 10 is pressed in over the perforation 11, this grip surface is released. Locking ribs 8 are formed inside the collar 5 below the recessed grip 9. These dip into the recessed grip 9 and prevent the buckets from twisting in the stack because the locking ribs 8 are fixed laterally by the wall of the recessed grip 9. The carrying handles are fastened in holes in the collar 5 and always have the same position in the stack due to the stop of the locking rib 8. The surrounding collar 5 rests fully on the next stacked bucket over its entire circumference. The bucket stacks are therefore vertical. With commercially available spacers, bucket stacks are always formed with a lateral incline. The opening force required for the lid is low because the lid can be easily released at the point predetermined by the recessed grip 9. The locking force is provided by the bucket latches 12 and the lid latches 27, which are force-

are interlocked and the clamp closure of the sealing lip 3 with the sealing groove 23. The slanted position of the sealing groove 23 and the sealing lip 3 and the slightly thicker wall of the outer web 25 result in an elastic clamp closure. Manufacturing tolerances of the buckets and lids are bridged because, despite possibly different diameters, the sealing system always forms on one wall.

When closing, the lid 20 is pressed directly vertically onto the bucket or placed loosely and pressed on using rollers. The sealing lip 3 serves as a pre-centering for the centering bar 26. When actually pressed on, the centering shoulder 4 of the bucket and the centering bar 26 of the lid lock into place. Due to the greater length L 1 of the centering shoulder 4 compared to the length L 2 of the sealing lip 3, the sealing lip 3 is free, i.e. protected, when closing begins. Only when the centering shoulder 4 and the centering web 26 have found each other centrally and are precisely guided to each other, the sealing lip 3 snaps into the sealing groove 23. The lengths of the sealing groove 23 and the centering web 26 of the lid are congruent with the length L 1 and L. The bucket and lid form an outer cylindrical part X with the same diameter when closed. This creates a closed outer surface. The lid cannot be accidentally detached from the bucket. During transport and loading processes, the buckets and lids always collide with this cylindrical part.

30' outer surface X against each other. This cannot lead to damage to the lock. Likewise, there is no possibility of attack under the edge of the lid. The actual lock and the latches 12 + 27 are protected within the outer surface X.

Claims (1)

- oMi sayings Protection claim I Plastic bucket and lid with collar-shaped spacer and concealed clamp closure consisting of a container with an outwardly projecting collar (5) and a centering shoulder (4) and pressure flange (2) formed thereon, as well as a sealing lip (3) pointing axially away from the bucket opening, and a lid (20) consisting of an outer centering web (26) and a sealing groove (23) which is formed by the outer web (25), head flange (24) and inner web (22), characterized in that the collar (5) forms a protective space (6) with the bucket wall (1) and the sealing lip (3) and the centering shoulder (4) are protected and concealed when the buckets are stacked one inside the other, and that the collar (5) is designed as a closed cylinder with the same height all around and has the same diameter as the centering web (26) of the lid (20) in the closed state and has a common outer cylindrical surface X and opening is not possible without aids and that the centering web (26) with the outer web (25), the head flange (24) and the inner web (22) surrounds the sealing groove (23) in a protective manner. Protection claim II Plastic bucket and lid with collar-shaped spacer and concealed clamp closure according to claim I, characterized in that the diameter of the sealing lip (3) is smaller than the inner diameter of the centering web (26) and that the length L 1 of the centering shoulder (4) is greater than the length L 2 of the sealing lip (3) and that the length of the centering web (26) and the sealing groove (23) are congruent with the proportions of the centering shoulder (4) and the sealing groove (3) and that as a result when the lid (20) is loosely placed on the bucket, a pre-centering for the closing process occurs and that the diameter of the centering shoulder (4) is only a few tenths of a mm smaller than the diameter of the centering bar (26) and the centering shoulder (4) has bucket latches (12) which are force-locked into the lid latches (27) of the centering bar (26) when closed. Protection claim III Plastic bucket and lid with collar-shaped spacer and concealed clamp closure according to claim I+II, characterized in that the sealing lip (3) and the sealing groove (23) have an inclined position and therefore always have a sealing system and function even with different diameters and manufacturing tolerances. Protection claim IV Plastic bucket and lid with collar-shaped spacer and concealed clamp closure according to claims I-III, characterized in that the outer web (25) is significantly thicker than the inner web (22) and the sealing groove (23) forms a clamp fit with the sealing lip (3) due to dimensional shrinkage during manufacture. Protection claim V Plastic bucket and lid with collar-shaped spacer and concealed clamp closure according to claims I-IV, characterized in that the collar (5) has one or more grip recesses (9) which are concealed with securing elements (10) and only when the securing segments (10) are pressed in via a perforation (11) is it possible to grasp and release the centering web (26). Protection claim VI Plastic bucket and lid with collar-shaped spacer and concealed clamp closure according to claims I-V, characterized in that locking ribs (8) are formed below the handle recess (9) in the protective space (6), which, when the buckets are stacked one inside the other, dip into the handle recess (9) of the lower bucket and are locked by the side wall of the handle recess (9), thus preventing radial rotation of the individual buckets. Protection claim VII Plastic bucket and lid with collar-shaped spacer and concealed clamp closure according to claims I-VI, characterized in that the lid surface (21) rests on the pressure flange (2) in the closed state and absorbs the weight forces of stacked buckets and transfers them to the bucket wall (1).