FI65971B - HOPLAEGGBAR TRANSPORT- OCH FOERVARINGSBEHAOLLARE - Google Patents

Description

65971

Collapsible transport and storage tank

The invention relates to a collapsible container for the storage and transport of bulk products, in particular powdered substances, for example flour. More specifically, the invention relates to a container as defined in the preamble of the independent claim.

Containers of this type are often used as transport packaging for various types of bulk products, which are considered to be solids, "flowable" substances. This may be the case, for example, with flour with which the producer fills the container through the filling opening of the container bag and which container is then transported to the consumer, where it is emptied through the emptying opening each time it is used. Once the container has been emptied and the container bag has been folded into a pile in the bottom part, the container is transported back to the producer, whereby it is preferably stacked with a few similar similarly emptied containers.

In a known container of this type, the lower end of the container bag is fixed around an emptying opening formed by a central opening controlled by a manually operated valve in a rigid, flat base plate. It often happens that the outflow through the drain hole is interrupted by the fact that a bridge is formed above the drain hole and does not start again until the bridge has been collapsed. In order for the container to be completely emptied, it is further required that the container bag, when it begins to be empty, be lifted so that its lower part forms a funnel. In addition, the container or the like into which the container is emptied must be located at a lower level, i.e. either the container must be kept raised above the floor or the receiving container must be located below the floor or below the base on which the container stands.

The object of the invention is to provide a container as mentioned in the introduction, in which emptying can take place completely by hand without assistance and regardless of where and at what level the container is placed. This is achieved by shaping the container according to the characterizing part of the independent claim. Embodiments of the container according to the invention may have one or more of the features given in the dependent claims.

The invention will be explained in more detail below with reference to the accompanying drawings.

Figure 1 is a side view of a container according to the invention filled; Figure 2 shows a stack of empty containers according to the invention; Figure 3 shows on an enlarged scale a vertical section of the bottom of the container.

The container shown consists entirely of a marked bottom part 11 and a collapsible container bag 12 attached to it, which is a airtight fabric with a grooved surface. The base part 11 has four legs 13. The lifting fork of the fork lift truck can be inserted into the space between the legs when the hopper is lifted and moved. When the container is lifted, it rests on the lifting fork via a support frame 14 attached to the legs.

The base portion 11 is circular when viewed from above and has a substantially cylindrical jacket 15 having legs 13 formed therein and a funnel-shaped bottom wall 16 / attached to the jacket 15 at its upper or outer edge and having a drain opening 17 at the bottom, center, and a drain socket 18 connected thereto. The connection end of the tube 19 is easily accessible between the two legs 13. The bottom part 11 is rigid, i.e. neither the jacket 15 nor the bottom wall 16 move relative to each other or change its shape under the influence of the forces which occur in the normal use of the container.

At its upper end, the jacket 15 has a tapered portion 20 which forms a fastener both to the upper edge of the bottom wall 16 - this is attached to the upper edge of the tapered portion - and to the open lower end of the container bag 12.

The container bag 12 is thus not pulled at its lower end but is open towards the bottom wall along its entire circumference. The lower edge of the container bag 12 is clamped to the outside of the jacket portion 20 by a compression ring 21 extending around it.

The tapered jacket portion 20 of the base portion 11 is dimensioned in height and diameter so that the empty container can be stacked on top of other similar containers, see Figure 3. In each case, the legs 13 in the bottom container 11 connecting the cylindrical portion of the tapered sheath portion 20 to the main portion of the sheath 15. The width of the horizontal portion 20B is calculated so that the containers in the stack cannot move sideways relative to each other.

The container bag 12 is generally round cylindrical in its entirety, see in particular Figure 1. Above it there is a round top wall with a cord-filled filling neck 22 placed in the middle. arcuate bent rods 24A on two infill supports 24 removably attached to the base portion 11. These supports are used during the filling phase to keep the container bag elevated, but are normally removed immediately after filling and do not normally accompany the container as it is transported to the consumer. Of course, if the empty containers are stacked as shown in Figure 2, it is necessary to remove the support.

The bottom wall 16 has a pneumatic fluidized bed apparatus comprising an air-permeable fabric 25 placed on the top surface of the bottom wall and a plurality of hoses 26 connected to the bottom wall to blow air between it and the fabric 25. These hoses are connected to a common air duct 26A.

The fabric 25 covers the entire upper surface of the bottom wall 16. The fabric is pressed around the upper edge of the bottom wall against the tapered sheath portion 20 together with the lower edge of the container bag 12. In the discharge opening 17, the fabric goes down a distance to the discharge socket 18, against the inner surface of which it is pressed by means of the compression ring 27.

A plurality of radial rails 28, two of which are shown in Figure 3, extend between the drain hole 17 and the tapered sheath portion 20 and secure the fabric against the bottom wall 16.

5,65971

Inside the circular sector-shaped parts between the rails 28, the fabric is detached on the bottom wall and therefore has a certain but somewhat limited freedom of movement with respect to the bottom wall, but above all it can allow air to enter the space above the fabric. Thus, the air introduced through the hoses 26 (these are connected in the middle of the substantially circular sector-shaped parts) can, distributed mainly over the entire surface of the fabric, penetrate the powdered material stored in the container, thus becoming fluid and therefore easily draining and through the discharge opening 17. according to it.

On the other hand, the apex angle α of the funnel-shaped or conical bottom wall 16 must not be less than necessary for the flowing material itself to flow into and through the discharge opening. This requirement is already satisfied by a somewhat large peak angle in the container according to the invention.

A large apex angle is detrimental because the overall height of the base portion remains low. On the other hand, the apex angle must not be greater than that the bottom wall provides sufficient space for the empty container bag to be assembled so that stacking can take place without obstructing the container bag. A peak angle in the range of 120 ° to 165 ° is generally not usable and, as far as possible in individual cases, the peak angle should therefore be chosen as close to the upper limit as possible.

Claims (3)

6 65971 1. A collapsible container for the storage and transport of bulk products, in particular powdered substances, eg flour, with a rigid, footed bottom part with emptying holes and a tank bag made of flexible, cloth or cloth-like material attached to the bottom part, the interior of which is in contact with the drain hole, and having a closable filling opening at the upper end, the container bag being empty when foldable into the base part and the container with the container bags folded into the base part being stackable with other similar containers, characterized in that the bottom part (11) has a funnel-shaped rigid bottom 16 ( ), the horizontal dimension of which is approximately equal to the horizontal dimension of the entire base part (11) and to the periphery of which the open lower end of the tank bag (12) is fixed, the bottom wall (16) has a pneumatic fluidized bed device (25, 26) and a discharge opening (17) the bottom wall is yh connected to a discharge socket (18) accessible via a space between adjacent legs (13) and that the fluidized bed apparatus comprises an air permeable fabric (25) covering the upper surface of the bottom wall (16) and air guide means (26) for conducting compressed air to the fabric (25). ) and the bottom wall (16), wherein the fabric is attached to the bottom wall along a plurality of substantially radial lines (28) from the discharge opening (17) to the circumference. Container according to claim 1, characterized in that the bottom part (11) has a substantially cylindrical jacket (15), the upper part (20) of which is pulled inwards horizontally to give space for the legs (13) of a similar container above, and that the container bag (12) is open the lower end is pressed against the edge surface of the tapered portion (20). Container according to Claim 1 or 2, characterized in that the apex angle (α) of the bottom wall (16) is 120 to 165 °.