EP2799356B1 - Plastic container - Google Patents

Description

The invention relates to a plastic container with tread.

Various plastic containers are known from the prior art. For example, this describes DE 40 06 188 C1 a transport box made of plastic with a bottom, which is provided on its underside with ribs on the edge area carry a second circumferential bottom surface which forms laterally open pockets with the bottom and the ribs. This construction of a transport box gives the ground a very high stability so that heavy industrial goods can be transported in the box. The second circumferential bottom surface makes it possible to transport the box on roller conveyors. For this purpose, the second bottom surface at its edge facing the center of the box has an obliquely upwardly extending section.

Also DE 198 44 014 C1 discloses such a transport box, which corresponds to the preamble of claim 1.

The invention has for its object to provide an improved transport and storage container made of plastic.

The object underlying the invention is solved by the features of the independent claim. Preferred embodiments of the invention are indicated in the dependent claims.

It is a plastic container with a bottom and standing on the ground side walls, wherein a receiving area of the container is defined by the bottom and the side walls, wherein the bottom has on its side facing away from the receiving area a tread. The tread has at its seen in the plane of the tread outer region a recess open towards the outside of the container, wherein the recess has a bottom side and an upper side facing the receiving area, wherein the bottom side is resiliently formed with respect to the top.

In the context of the description, the term "running rim" is understood to mean that surface of the container with which the container at least partially rests on a floor surface. When rolling over a roller conveyor of the tread is the surface "run-up area", with which the plastic container runs on the rollers of the roller conveyor and then gets into contact with the rollers of the roller conveyor.

Embodiments of the invention could have the advantage that the noise during the sliding of the plastic container over the rollers of the roller conveyor is minimized. The resilient design of the outer edge of the tread gently cushioned when rolling the tread on a transport roller of the reeling. This softer cushioning minimizes the noise associated with rolling up.

Another advantage could be that vibrations of the plastic container are minimized by the softer curling. This makes it possible to transport such cargo in the plastic container, which is sensitive to shocks. These could be, for example, optical measuring instruments.

According to one embodiment of the invention, the recess extends around the entire outside of the container. Thus, it does not matter in which direction the plastic container slides over the rollers of the roller conveyor. In every orientation there is a minimization of noise during sliding over.

According to one embodiment of the invention, the recess is divided into a plurality of chambers by webs. Alternatively, the recess extends continuously around the entire outside of the container. While the latter has the advantage that the resilient properties of the recess can be better utilized, dividing the recess into a plurality of chambers by means of webs could have the advantage that the stability of the recess is increased. In particular, this could avoid that the region of the recess breaks off from the edge of the container.

According to one embodiment of the invention, the plastic container further comprises a groove extending on the bottom side of the recess, the groove extending parallel to the outside of the container towards which the recess is open. The groove may be straight or serpentine or zigzag parallel to the outside of the container. The extension direction of the groove is thus parallel to the outside of the container. Thus, if the recess extends around the entire outside of the container, the groove runs parallel to the associated outside around the entire container. The use of a groove could have the advantage that the resilient properties of the casserole area the container can be further optimized. For example, a very impact-resistant plastic could be used as the tread, which has only low resilient properties. By providing an additional groove, however, takes place in the region of the groove material thinning, so that thereby the spring action can be adjusted. This can be defined by the choice of a virtually arbitrary plastic for the tread, the spring property of the casserole area, that is, the recess.

Preferably, the groove is V-shaped, the recess terminating in a bounding wall with the tip of the groove facing the wall. The recess thus has in this case the said upper side, the bottom side, wherein the bottom side and the upper side are connected to each other by this limiting wall.

The use of a V-shaped groove could allow in a particularly simple manner to adjust the spring characteristics of the casserole. The reason could be that the V-shape in the material, a highly defined weakening is introduced, which allows the said spring action.

According to one embodiment of the invention, the thickness of the bottom side decreases in the region of the recess in the direction of the outside of the container. Thus, instead of the container abruptly coming to rest in the region of the recess on a roller of a roller conveyor, the decrease in the thickness of the bottom side, which is preferably continuous, results in a very smooth start-up and thus a continuous increase in the spring force. This leads to the noise being further minimized.

According to one embodiment of the invention, the bottom side is rounded at its outer edge facing the outside of the container. This also serves to optimize the emergence of the outer edge on a roller of a roller conveyor. An abrupt and thus noise developing emergence is avoided.

According to one embodiment of the invention, the recess ends by said limiting wall, wherein the wall itself is also rounded. The rounding of the wall further allows to precisely adjust the resilient properties of the bake area. By rounding off, however, the mechanical stability of the connection of the region of the recess is increased to the rest of the floor. There are no force peaks due to the rounding, so that the risk of breakage of the resulting by the recess run-area is minimized.

According to one embodiment of the invention, the bottom side opposite the top is so resiliently designed to reduce a running noise of the container on a roller conveyor when the tread moves over the roller conveyors.

According to one embodiment of the invention, the bottom has pockets open to the outside of the container, the pockets being formed by the bottom and the tread, the pockets being formed by ribs connecting the bottom and the tread. This could allow low cost of materials cost-effective production of the container in an injection molding process. So it is not required solid material from which out the recess is formed.

According to one embodiment of the invention, the ribs forming the pockets run obliquely to the outer sides of the container. Since transport boxes are usually transported via roller conveyors aligned with at least one side wall parallel to the rollers, is ensured by the oblique arrangement of the pockets forming ribs that in most cases of transport of the plastic container via a roller conveyor, the majority of the ribs obliquely to the rollers is arranged. The container never rests with a rib parallel to a roll on the roll. This could avoid that, in particular, the container is in such a position for a long period of time, in which the container is located with the ribs in parallel between different roller conveyors. In other words, it could be avoided that in case of unfavorable positioning of the container, the ribs each lie like this come that they are parallel to these rollers in the cavities between adjacent rollers. This could cause the area between the ribs to bend down towards the rollers. Even a slight deformation would be sufficient here, however, that in the case of a subsequent sliding of the container over the rollers due to the unevenness of the tread now present, a noise during overflow is increased. In this case, it could thus be prevented by inclined ribs that unintentional bending and thus shaking of the container when overflowing over the rollers.

The inclined ribs, in particular at an angle of 45 ° to the respective side walls thus also minimize the risk of noise when overflowing over a roller conveyor.

According to one embodiment of the invention, the limiting wall is formed by the ribs forming the pockets, the upper side also being formed by the ribs forming the pockets. Since thus the recess is preferably present only in the ribs themselves, the further technical is hardly or not at all affected by the recess by providing the recesses.

According to one embodiment of the invention, furthermore, a rib bottom in the center of the bottom, as viewed relative to the outer sides of the container, is arranged on the ribs forming the pockets. The ribs forming the pockets thus completely surround the ribbed bottom. This makes it possible to optimize the container properties in terms of their carrying capacity by a special design of the ribbed floor and at the same time to optimize the running characteristics of the container via a roller conveyor by a corresponding configuration of the pockets forming ribs.

For example, the ribs of the ribbed bottom could run perpendicular to the outer sides of the container, whereby in particular a power transmission from the container center to the container outer sides can be optimized. The ribbed floor thus leads to an unintentional bending of the soil in the area of the ribbed floor is reduced. Preferably, the ribbed bottom is additionally concave, that is curved in the direction of the container interior. This also helps to increase the carrying capacity of the container when loading at high loads. Forces acting on the container bottom in the middle are transmitted uniformly outwards in the direction of the outer walls or in the direction of the ribs forming the pockets and from there onto the tread.

According to one embodiment of the invention, the tread and the bottom and / or the pockets forming ribs are integrally formed. For example, these could be made by injection molding.

According to one embodiment of the invention, the tread and the floor have different materials. Thus, for example, a material can be selected for the tread, which optimizes the noise properties when overflowing the tread over a roller conveyor in a particularly efficient manner. With respect to the bottom and the rest of the container, however, a material could be selected, which is particularly impact resistant and stable.

It should be noted that the above-described embodiments of the invention can be combined with each other in an arbitrary manner, as long as the combined embodiments are not mutually exclusive.

Figur 1

eine schematische Ansicht eines Transport- und Lagerbehälters aus Kunststoff,

Figur 2

eine seitliche Ansicht eines Behälters,

Figur 3

eine vergrößerte Ausschnittsansicht der Figur 2,

Figur 4

eine Ansicht eines Bodens des Behälters der Figur 1,

Figur 5

eine Ansicht eines Behälterbodens,

Figur 6

eine seitliche Ansicht eines weiteren Behälters.

Embodiments of the invention are explained in more detail below with reference to the following drawings. Show it:

FIG. 1

a schematic view of a transport and storage container made of plastic,

FIG. 2

a side view of a container,

FIG. 3

an enlarged sectional view of the FIG. 2 .

FIG. 4

a view of a bottom of the container the FIG. 1 .

FIG. 5

a view of a container bottom,

FIG. 6

a side view of another container.

Hereinafter, similar elements will be denoted by the same reference numerals.

The FIG. 1 shows in a perspective view of a plastic container 100 for transporting and storing piece goods with bottom 102 and side walls 104 which senkkenkt stand up on the floor 102. Through the bottom 102 and the side walls 104, a receiving area 105 of the container is defined, in which the cargo can be received.

It can also be seen in FIG. 1 Pockets 202 which are open to the outside of the container. The pockets are formed by the bottom 102 and a tread 200 of the container 100. Ribs 204 connect the bottom 102 with the tread 200.

This is in more detail in the sectional drawing of FIG. 1 AA in the FIG. 2 seen. The container 100 can be placed with its tread 200 on a surface. For example, the surface may be transport rollers of a roller conveyor. As further in the FIG. 2 it can be seen, connects to the tread 200 in the direction of the container center (ie, opposite to the direction to the outside 208 of the container) to another area 206, through which the bottom of the container is formed concave toward the receiving area 105 of the container. Now push loads through the cargo on the floor 102, this is done by an optimal power transmission to the tread 200. In addition, it is possible that the bottom 102 bends slightly due to the concave shape of the portion 206 down.

In the FIG. 3 is shown in an enlarged view of the outside 208 facing edge region of the tread 200. As can be seen there, the tread 200 has at its outer region, seen in the plane of the tread, a recess 300 open towards the outside 208 of the container. The recess has a bottom side 304 and an upper side 302 facing the receiving region of the container. According to the above description, the bottom side 304 is resiliently formed with respect to the upper side 302. Further, on the bottom side 304 of the recess, there is a groove 308 in the tread 200, the groove 308 being V-shaped. The tip of the V-shape in this case has the limitation indicated by reference numeral 310.

The boundary is formed by one of the ribs 204. In the embodiment of FIG. 3 Thus, the recess 300 is a recess which has been formed in the rib 204. The element labeled 310 is thus a rounded bounding wall formed by the rib 204.

It can also be seen in FIG. 3 in that, on the one hand, the thickness of the bottom side 304 in the region of the recess 300 decreases continuously in the direction of the outside 208 of the container. In addition, the bottom side 306 is rounded off on the front side toward the outside 208.

Now runs the in FIG. 3 apparent container to the right on a conveyor roller, not shown, so will first accrue with its chamfer 306 on the role when hitting the rib with respect to the tongue 204 projecting tread on the role of the tread. Due to the freestanding tongue shape, the tread 200 is resiliently formed in its front portion, which is further enhanced by the presence of the groove 308. When acting on the conveyor roller acting on the container 100 forces are mitigated by the resilient yielding of said tongue. As a result, the noise that occurs when the container runs on a conveyor roller, minimized.

The FIG. 4 shows a perspective view of the relative to the Figures 1 - 3 discussed container 100, which is even more clearly seen how the recess 300 is realized by a material recess on the ribs 204. In the outer region of the container 100, the ribs 204 are thus not pulled through to the outer edge of the tread 200, but in this area material of the ribs 204 is recessed.

The FIG. 5 shows the container 100 in a plan view of the floor from below. The ribs 204, which are not normally visible in this view, have been shown schematically for the sake of completeness, which in reality are covered by the tread 200. As already mentioned above, a set of pockets 202 are formed by the bottom 102 and by the tread 200 and by the ribs 204 set at 45 ° to the outer walls. The ribs 204 extend diagonally in each quadrant of the container bottom. The ribs of adjacent quadrants meet one another only in sectional lines, which in each case bisect the container bottom in the longitudinal and transverse sides.

Further apparent in the FIG. 5 is the schematically illustrated groove 308, which extends continuously parallel to the outer sides of the container on the tread. It can be seen in FIG. 5 a rib bottom 402, which is adapted to the in FIG. 2 discussed bevel 206 of the bottom of the container in the central area to realize. The ribs 400 of this ribbed bottom 402 run perpendicular to the outer sides of the container.

While the inclined ribs 204 serve primarily to reduce the running noise of the container via a roller conveyor, the ribs 400 placed perpendicular to the outer walls serve to optimally transfer load from the container resting on the floor 102 to the cradle 200. Overall, this is generally the case spoke two different rib geometries for the central ribbed bottom and the adjoining pockets of the container used.

In the Figures 1 - 5 Thus, a variant of a plastic container was discussed, in which the suspension of the edge region of the tread was realized by a recess of the ribs 204.

In the FIG. 6 an alternative variant is shown in which the pockets 202 are kept unchanged below the bottom together with the ribs 204 in the outer region of the container. Instead, a special tread 200 was chosen, now the tread 200 itself has the said recess 300. In this case, in the tread 300 due to the recess 300, said bottom side 304 and said top 302 are provided.

In the variant of Fig. 6 It may be advantageous if the recess 300 is further subdivided by different webs not shown in detail. Although it could be weakened in the region of the webs, the spring action of the tread. However, the overall stability of the container is increased overall by the provision of the webs.

Although in FIG. 6 the continuous decrease in the thickness of the tread (see Figure 3, reference numeral 306) is not shown in detail, it is understood that such a variant of the tongue-shaped ramp portion of the tread may be provided.

LIST OF REFERENCE NUMBERS

100

container

102

ground

104

Side wall

105

reception area

200

tread

202

bag

204

rib

206

concave area

208

Outside of the container

300

recess

302

top

304

bottom side

306

Area

308

recess

310

rib edge

400

ribs

402

ribbed floor

Claims (17)

1. A plastic container (100) with a bottom (102) and side walls (104) standing on the bottom (102), the bottom (102) and the side walls (104) defining a holding area (105) of the container, the bottom (102) having a flange (200) on its side facing away from the holding area (105), characterized in that the flange (200) has, on its outer area when viewed in the plane of the flange (200), a recess (300) that is open in the direction toward the outside (208) of the container, the recess (300) having a bottom side (304) and a top side (302) facing toward the holding area (105), the bottom side (304) being resilient with respect to the top side (302) in its outer area when viewed in the plane of the flange (200).
2. The plastic container (100) described in claim 1, wherein the recess (300) extends around the entire outside (208) of the container.
3. The plastic container (100) described in claim 2, wherein the recess (300) is subdivided by ribs into multiple chambers.
4. The plastic container (100) described in claim 2, wherein the recess (300) extends continuously around the entire outside (208) of the container.
5. The plastic container (100) described in one of the preceding claims, which also has a groove (308) running around the back of the bottom side of the recess (300), wherein the groove (308) extends parallel to the container's outside (208), toward which the recess (300) is open.
6. The plastic container (100) described in claim 5, wherein the groove (308) is V-shaped, the recess (300) being ended by a bordering wall (310) [and] the tip of the groove (308) pointing toward the wall (310).
7. The plastic container (100) described in one of the preceding claims, wherein the thickness of the bottom side in the area of the recess (300) decreases in the direction toward the outside (208) of the container.
8. The plastic container (100) described in claim 7, wherein the thickness decreases steadily.
9. The plastic container (100) described in one of the preceding claims, wherein the bottom side (304) is rounded on its outer edge pointing toward the outside (208) of the container.
10. The plastic container (100) described one of the preceding claims, wherein the recess (300) is ended by a bordering wall (310) which is rounded.
11. The plastic container (100) described in one of the preceding claims, wherein the bottom (102) has pockets (202) open toward the outside (208) of the container, the pockets (202) being formed by the bottom (102) and the flange (200) [on the one hand, and, on the other hand] by ribs (204) connecting the bottom (102) and the flange (200).
12. The plastic container (100) described in claim 11, wherein the ribs (204) forming the pockets run at an angle toward the outside (208) of the container.
13. The plastic container (100) described in claim 11 or 12, wherein the bordering wall (310) is formed by the ribs (204) forming the pockets and wherein the top side (302) is [also] formed by the ribs (204) forming the pockets.
14. The plastic container (100) described in one of the preceding claims 11-13, wherein a rib bottom (400) is arranged against the ribs (204) forming the pockets, in the middle of the bottom (102) when viewed relative to the outside (208) of the container (100).
15. The plastic container (100) described in claim 14, wherein the ribs (402) of the rib bottom (400) run perpendicular to the outside (208) of the container (100).
16. The plastic container (100) described in one of the preceding claims, wherein the flange (200) and the bottom (102) are made as a single piece.
17. The plastic container (100) described in one of the preceding claims, wherein the flange (200) and the bottom (102) and/or the ribs (204) forming the pockets [are made of] different materials.

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