EP0941947B1 - Bulk material container with hinged opening door pivotable about an axis - Google Patents

Description

The invention relates to a bulk container, according to the preamble of claim 1.

Such a bulk container is known from DE 344 691 C. On the emptying opening has a downward-pointing nozzle inside crowned surface in cross section required what an elaborate production means. Depending on the delicacy of the content the container is still not a complete seal possible.

Another bulk container with discharge opening and swiveling Opening flap is from EP 0 142 003 B2 - there as a batch mixer - already known. It is envisaged that the between the first Narrow side and the outside of the opening flap formed angle is an acute angle with the aim of being open and accordingly flap hanging down on this upper first narrow side no bulk goods should be able to remain because of this slant Narrow side slips. In one embodiment, this Previous publication, this angle is chosen so that the between the first narrow side of the opening flap and the corresponding housing wall joint in the closed position approximately runs horizontally and its cross-section approximately to the middle of the Axis of rotation is directed.

This arrangement has proven itself for such applications, at which the bulk material due to the slant of the narrow side in opened state completely slips off this and falls. Is the bulk and / or at least part of the first The narrow side of the opening flap can be damp, despite the sloping Course of the cross section of the first narrow side of bulk material this stick and then when closing the emptying opening come into a position in which it is on this first narrow side due to the slant provided by gravity is held. When it is finally closed, such bulk material gets into it into the joint and prevents the Opening flap. Are high clamping forces provided because for example, a high weight of what is in the container Bulk goods must be counteracted, under certain circumstances the bulk material that has got into the joint, the swivel bearing and possibly even the closing mechanism of the opening flap can be damaged. In front however, there are all significant problems with the sealing the opening flap in its closed position, because above all that parallel narrow side spaced apart from this first narrow side the opening flap a relatively large compared to the housing wall forms an open gap. Such large gaps can then pass through voluminous seals can no longer be bridged.

There is therefore the task of having a bulk container to create a pivotable opening flap of the type mentioned at the outset, in which the jamming of bulk material in the joint between Avoided the opening flap and the opening edge, and thus also when it is damp Bulk material or damp opening flap completely closed can be. The bulk goods container is also intended for bulk goods be suitable that contain powdery or dusty components or consist of such.

This task is carried out with the features and measures according to claim 1 solved.

This results in particular when closing the Opening flap a scissor-like parallel movement of their first Narrow side with the corresponding narrow side of the discharge opening, so that bulk material adhering to one of these narrow sides not through a relative approach movement of these narrow sides pinched, but by this essentially in parallel Is stripped in the direction of the shearing movement. So can between these two narrow sides at best one in Closing position existing small gap filling bulk quantity remain, but none generated by the closing force Pressure on the mutually movable parts and the swivel axis or can exercise the swivel mechanism. Compared to the prototype EP 0 142 003 B2, where the Removal of bulk material from the narrow side is sought by the solution of the problem outlined above a completely took another path, the one that remained on the narrow side Bulk material is stripped off by the closing process, the joint between the two corresponding in the closed position Narrow sides seen in cross section runs approximately on the circle or approximates the circle from the narrow side of the Opening flap is described during the closing process, so that possibly remaining bulk goods cannot be compressed.

Due to the seal provided, the bulk container is for the majority of bulk materials, especially those that are powdery or contain dusty constituents or from such exist, suitable. By in the characterizing part of the claim 1 specified arrangement of the seal can be achieved that the Seal gradually as the counter surface closes is under increasing pressure because the counter surface and the sealing surface is not at a right angle in the sense approach that one surface after a touch the seal overall compressed, but because of the oblique and gradual approximation also the compression of the seal in the course the pivoting increases in the closed position. The seal will because of this arrangement not directly from each other approaching surfaces compressed, as is the case with the seal. EP 0 142 003 B1 is provided, but it can even be on the Seal adhering material first through the closing process be scraped off, the further course of the closing movement the seal increasingly from the scraping counter surface is acted upon and compressed. Here is the pressure force transverse to the closing direction and not in the closing direction. This means that practically no bulk material can adhere to the sealing surface and impair the sealing effect. Practically takes place at Seal an automatic self-cleaning of the sealing area.

The oblique first narrow side of the opening flap can, in cross section seen with the inside enclosing an acute angle, its edge when pivoting in the closed position as a scraper serves at least on the counter slope.

The slant of the first narrow side, that with the outer surface encloses an obtuse angle, so it can go to the inside be continued that there is a corresponding acute angle is formed, the edge of which is suitable as a scraper of bulk material is, possibly in the area of the emptying opening on its edge or Narrow side stuck. This gives the edge of the Opening flap due to this shape and bevel Narrow side an advantageous function as a scraper, so that between the narrow sides and edges of the opening flap and No bulk material can be trapped and pressed in can. This is especially true in the area of the swivel axis The narrow side adjacent to the opening flap is an advantage because the Pinching foreign objects at this point in parallel running edge of such an opening flap corresponding to the The gap of this edge would gap significantly further.

An embodiment of the invention can consist in that the parallel to the first narrow side close to the swivel axis second narrow side of the opening flap one at an angle to Outside of the flap, especially the circle has an approximate cross-sectional shape, that of it when pivoting is described about the pivot axis, and that that of the second Counter slopes at the narrow side in the closed position Emptying opening or one at another opening flap has a suitable, approximately parallel cross-sectional shape. Consequently can also on this second narrow side remote from the pivot axis jamming of bulk goods can be prevented, which is a would have significantly less impact, but still one Leakage could result. Also in the area of the second narrow side can be ensured that evt1. adhering bulk material at Closing process is automatically stripped at least to the extent that the closing process itself is not hindered.

It is again expedient if the second narrow side with the Outside of the opening flap - seen in cross section - one blunt and point with the inside of the opening flap Includes angle and that between the narrow side and the The inside edge serves as a scraper. While closing Such a bulk container is first the inner edge of the first narrow side its stripping function begin while stripping on the second narrow side during the very last part of the closing movement, so that those that may result from such stripping operations Resistances do not occur simultaneously.

A particularly effective and for stripping bulk goods on the one hand and the tightest possible closure on the other favorable arrangement in a particularly simple embodiment can be that the cross section of the first narrow side and / or the second narrow side of a tangent to the respective swing circle or swing cylinder of these narrow sides corresponds to the pivot axis of the opening flap and the Narrow side (s) is (are) essentially flat. In one Such cases only need only one level overall To be trained on narrow sides, but on which nevertheless inventive advantageous stripping effect can be generated.

But it is also possible, especially with a bulk container with a relatively large wall thickness and / or a relatively large thickness too the opening flap the narrow side (s) with a polygonal Cross-section, i.e. with areas with different helix angles to be provided, these areas each tangent to the Envelope circle or the envelope cylinder can correspond to the Swiveling the opening flap and / or from the narrow side (s) is described. With relatively large wall thicknesses, one could be used Helix angle may require a joint that is too large do what through one or more changes to the bevel the cross section of the opening flap and accordingly also the emptying opening can be avoided. The more different, put together Sloping surfaces form the narrow sides the approximation to that described by the narrow sides can be greater Circle.

It is therefore possible that the narrow side (s) and / or the counter bevel (s) has a polygonal shape, and for such polygonal shape of their cross-section at least two planar areas at an angle to one another can be provided, between which an obtuse angle is enclosed.

It is particularly advantageous if the seal on the outside of the container and its sealing surface approximately in continuation of the Counter slopes of the discharge opening is arranged and the opening flap in continuation of its narrow side on the outside an approximately parallel running to the narrow side, with a blunt in cross section Angle-forming stop bar to interact with this seal has, the pressure surface facing the seal in cross section seen in the position of use in particular somewhat obliquely to the Sealing surface of the seal runs and the seal in this Use position somewhat suppressed. The bevel of the printing area is chosen relative to the sealing surface of the seal so that the greatest compression of the seal at the top edge region facing away from the container, that is, in The closed position takes the pressure between the pressure surface and the sealing surface seen from the container with increasing distance from its Outside too. This arrangement enables the closing process the sealing surface first shabby and then more and more with it Pressurize, but without two in the area of Seal directly approaching and pinching the seal Need surfaces so that no bulk material on the seal, impairing them, can be pinched.

The seal can be designed as a sealing strip, the sealing surface with a relaxed, non-loaded seal, i.e. when the Opening flap is in the open position, runs essentially flat and this sealing strip can preferably from the sealing surface and one of these neighboring displacement areas entirely or partially enclosed by a support housing. The seal can not avoid, but is replaced by the sliding and thereby increasing pressure through the pressure surface of the Stop bar is gradually compressed and can be adjusted accordingly exert a good sealing effect.

It is possible that the support housing together with the seal adjustable with this transverse to the longitudinal extent of the seal and adjustable, especially towards the opening flap is adjustable. Especially in the event of wear, the The seal can always be moved into a position in which an optimal sealing effect is achieved. In addition, from assembly easier from the start, because the seal with your Support housing pre-assembled and then on the opening flap and their counter surface can be adjusted.

It should be mentioned that the cross or perpendicular to the Pivot axis of the opening flap running on the narrow side of the Opening flap seen in cross section, with its outer and Form a right angle on the inside and the edges of the The emptying opening can be shaped appropriately and that in the area this approximately at right angles narrow sides Seals are provided on the outside on the edge of the emptying openings can be, which with counter surfaces inclined relative to them in cooperate in the sense that when you close the opening flap are increasingly compressible by this relative inclination. Thus, these can also run transversely to the pivot axis Narrow sides the beneficial sealing effect and self-cleaning the seal can be achieved through the corresponding narrow sides.

Especially when combining one or more of the above Features and measures result in a bulk container with emptying opening and serving to close it Opening flap, in which a jamming of bulk goods in the Gaps between the opening flap and the emptying opening are also avoided if there is an adhesive bulk material, be it due to Moisture or due to its own properties as this automatically from the narrow sides during the closing process and / or the seals provided there are stripped.

Fig.1

eine Seitenansicht und

Fig.2

eine Stirnansicht eines erfindungsgemäßen, als Mischer ausgebildeten Schüttgutbehälters,

Fig.3

in vergrößertem Maßstab die Ausbildung der Fugen zwischen den Schmalseiten einer Öffnungsklappe und dem als Behälter dienenden Mischergehäuse einerseits im Bereich von Schwenkachsen und andererseits in dem Bereich, in dem zwei Öffnungsklappen zusammenstoßen,

Fig.4

eine der Fig.3 entsprechende Darstellung, bei welcher die in dieser Figur rechte Öffnungsklappe teilweise geöffnet ist,

Fig.4a

in noch weiter vergrößerter Darstellung eine Ansicht in Richtung einer ersten, parallel zu der Schwenkachse verlaufenden Schmalseite der Öffnungsklappe, die schräg angeordnet ist und die Gegenschräge der Entleeröffnung sowie den von der ersten Schmalseite beim Öffnen oder Schließen beschriebenen Kreis, an welchen diese erste Schmalseite und die Gegenschräge der Entleeröffnung angepaßt sind,

Fig.4b

im Maßstab der Fig.4a eine zweite Schmalseite der in Fig.4 rechts befindlichen Öffnungsklappe und ihren Öffnungs- oder Schließweg bzw. den diesem etwa entsprechenden Kreis sowie die zweite Schmalseite der zweiten Öffnungsklappe, die aber auch die Gegenschräge einer bis dort verlaufenden Entleeröffnung sein könnte,

Fig.5

einen Längsschnitt des Behälters mit seiner Entleeröffnung,

Fig.5a

eine Ansicht der in Schließstellung befindlichen Öffnungsklappen von unten und jeweils eine ihrer ihre Schwenkachse bildenden Schwenklagerungen,

Fig.6

eine der Fig.3 entsprechende Darstellung, wobei der Behälter nur eine um eine Schwenkachse verschwenkbare Öffnungsklappe aufweist sowie

Fig.7

eine der Fig.6 entsprechende Darstellung, bei welcher die einzige Öffnungsklappe aus ihrer Schließstellung teilweise herausgeschwenkt ist, um bei einer weiteren Verschwenkung ihre etwa vertikale Öffnungsposition zu erreichen.

An embodiment of the invention is described below with reference to the drawing. It shows in a partially schematic representation:

Fig.1

a side view and

Fig.2

3 shows an end view of a bulk goods container according to the invention, designed as a mixer,

Figure 3

on an enlarged scale, the formation of the joints between the narrow sides of an opening flap and the mixer housing serving as a container on the one hand in the area of swivel axes and on the other hand in the area in which two opening flaps meet,

Figure 4

3 shows a representation corresponding to FIG. 3, in which the opening flap on the right in this figure is partially open,

4a

in a further enlarged view, a view in the direction of a first narrow side of the opening flap, which runs parallel to the pivot axis, which is arranged obliquely and the counter-bevels of the discharge opening and the circle described by the first narrow side when opening or closing, on which this first narrow side and the Counter slopes are adapted to the discharge opening,

4b

on the scale of FIG. 4a, a second narrow side of the opening flap on the right in FIG. 4 and its opening or closing path or the circle approximately corresponding to this, as well as the second narrow side of the second opening flap, which could also be the counter slope of an emptying opening running there .

Figure 5

a longitudinal section of the container with its emptying opening,

5a

2 shows a view of the opening flaps in the closed position from below and in each case one of their pivot bearings forming their pivot axis,

Figure 6

a representation corresponding to Figure 3, wherein the container has only one pivotable about a pivot axis opening flap and

Figure 7

a representation corresponding to FIG. 6, in which the only opening flap is partially pivoted out of its closed position in order to reach its approximately vertical opening position upon further pivoting.

A container designated as a whole with 1 serves for receiving and in the exemplary embodiment also for mixing bulk material and is in in this case approximately drum-shaped or cylindrical. On an emptying opening is provided in its lower wall area, the one with an opening flap 2 (Fig. 6 and 7) or with two wing-like to each other and pivotable away from each other Opening flaps 2 and 18 (Fig. 1 to 5a) can be closed. These opening flap (s) 2 (18) practically form a lower one Wall area of the container 1.

Instead of such an approximately cylindrical container 1, the Container 1 but also any other shapes, for example have the shape of a stand silo.

At this point it should be mentioned that in Fig. 6 and 7 an arrangement is shown, in which the container 1 only one Has opening flap 2.

The respective opening flap 2 can be pivoted about a pivot axis 3 and has a substantially rectangular shape in the exemplary embodiments Shape, being due to the cylindrical shape of the container 1 in addition also has a curvature in one direction. The pivot axis 3 is bided or stored by hinges 4.

In Fig.3, 4 and 4a and in Fig.6 and 7 you can see that the Pivot axis 3 near or parallel first narrow side 5 of the Opening flap 2 is formed obliquely in its cross section, that is between itself and a surface of the opening flap 2 one of Includes a 90 ° angle. The container or emptying opening has a counter bevel 6 that fits so that the first Narrow side 5 of the opening flap 2 and the counter bevels 6 of the edge 7 of the emptying opening in the use position at least in some areas run approximately parallel to each other, i.e. the narrowest possible joint form.

Especially with reference to Figures 3, 4 and 4a and Figures 6 and 7 it is clear that the first is arranged obliquely in cross section Narrow side 5 of the opening flap 2 with the surface of the outside 8 of this opening flap 2 an obtuse angle, that is, an angle includes that is greater than 90 °. Especially in the figures 4, 7 and even more clearly in FIG. 4 a, it can be seen that the course this narrow side 5 on the of it when opening or closing circle 9 described about the pivot axis 3 at least approximated is and also that the cross section of the counter bevels 6 of Discharge opening to match the outside 10 of the container 1 encloses an acute angle. Accordingly, the sloping first narrow side 5 of the opening flap 2, in cross section seen with the inside 11 an acute angle, the Edge 12 when swiveling in the closed position as a scraper serves at least on the counter slope 6. Especially when looking at it the Fig.4a is very clear that when closing the opening flap 2 whose narrow side 5 with the edge 12 first to the Counter-sloping 6 arrives and any bulk material located there scrapes and scrapes, just like the opposite slopes on the Narrow 5 located bulk goods can strip, so that in Closed position according to Fig.3 between the narrow side 5 and the Counter bevels 6 practically no more bulk goods can be present and especially with this closing movement at this point none Bulk material can be pinched, which affects the closing movement could prevent.

Especially in Figure 4b, but also in Figures 3, 4, 6 and 7 shown that the parallel to that of the pivot axis 3 near first narrow side 5 second narrow side 15 of the Opening flap 2 approximately at an angle to the outside 8 of this flap 2 extending, in particular to the circle 16, which by her at Swiveling about the pivot axis 3 is described, approximate Has cross-sectional shape and that that of the second narrow side 15th Counter slopes 17 acted upon in the closed position at the discharge opening (Fig. 6 and 7) or on a further opening flap 18 (Fig.3 and 4) a matching cross-sectional shape that runs approximately parallel Has. This also results in on this second narrow side 15 Opening flap an acute-angled edge 12 with the inside 11, which when closing according to Fig.4b on the counter slope 17 a scraping Has an effect and thus prevents pinching of bulk goods. The second narrow side 15 thus closes with the outer side 8 of the Opening flap 2 also a blunt and with the inside 11 an acute angle. As already mentioned, the edge located between the narrow side 15 and the inner side 11 12 as a scraper on the counter slope 17. This is Counter bevels 17 on a further opening flap 18 is only to ensure that when closing both opening flaps first the flap 18 and then the flap 2 are closed so that the located on the second narrow side 15 of the opening flap 2 Scraper edge 12 can take effect. Because in this case too the narrow side 15 and the counter bevels 17 to the swivel circle 16 are adapted to the pivoting of the opening flap 2 around the pivot axis 3 results, is again only one in the closed position such a narrow joint between the narrow side 15 and the counter slope 17 available, which is sufficient for many bulk goods tight seal is created.

In Figures 4a and 4b it can be seen that the cross section of the first Narrow side 5 and that of the second narrow side 15 each about one Tangent to the respective swivel circle 9 and 16 or swivel cylinder these narrow sides about the pivot axis 3 of the opening flap 2 corresponds and the narrow sides 5 and 15 are essentially flat are trained. This is particularly easy to manufacture. It would also be a slight curvature in adaptation to the swivel circles 9 and 16 conceivable.

It should also be mentioned that of course with an arrangement gem. 3 and 4 with two opening flaps 2 and 18 this second Opening flap 18 in the area of its pivot axis 3 in the same way with an oblique narrow side 5 and a stripping Edge 12 is provided, which cooperates with a counter slope 6.

The bulk material container shown in the exemplary embodiments 1 has one (Fig. 6 and 7) or two (Fig. 3 and 4) opening flaps 2 and 18, which are opposite the discharge opening by means of at least one Seal 19 are sealed. The seal 19 is a sealing strip formed and seals the joint between the closed opening flap 2 and counter bevels 6. It is the fugue and the Counter bevels 6 adjacent to the outside of the container 1 arranged, but could also on the outside of the opening flap 2 and / or 18 can be provided.

Their effective sealing surface 20 runs in cross section in Area of the respective swivel circle 9 and 16 or swivel cylinder, the respective narrow side 5 and 15 of the opening flap 2 or 18 and a stop bar 21 adjacent to these narrow sides describes, the sealing surface 20 or that in the embodiment on the stop bar 21 counter surface 22 this respective Swivel circle 9 or 16 or the corresponding swivel cylinder touches or cuts at an acute angle, which is particularly the case in Fig.4a and 4b is made clear. This ensures that the Counter surface 22 when closing the flap the corresponding seal 19 initially touches more and more in the further swivel course puts pressure on the sealing surface 20 and the sealing strip 19 in Area of their sealing surface 20 deformed so that it is due adapts its resilience to the counter surface 2 under pressure and achieved the desired sealing effect.

Although the seal 19 on the outside of the opening flap 2 and 18 may be provided, but it is in the embodiment arranged on the outside of the container 1 and its sealing surface 20 is in continuation of the counter slope of the discharge opening, which has the advantage that the stripping edge 12 of the first and the second narrow side also the sealing surface 20 automatically at Closing cleans.

The opening flap 2 and 18 continues in its narrow sides 5 and 15 on the outside the already briefly mentioned, approximately parallel to the Narrow sides, with a blunt in cross section Angle-forming stop bar 21 for interaction with the seal 19, whose seal faces, in the following as a pressure surface 22 designated counter surface seen in cross section in the use position runs somewhat obliquely to the sealing surface 20 and the seal in the use position, i.e. in the closed position, something with pressure in Applied and displaced circumferential direction of the container.

The sealing surface 20 of the seal 19 designed as a sealing strip runs in a relaxed, unencumbered situation in the essentially flat and this sealing strip is - from the sealing surface 20 and one of these adjacent displacement area 24 - enclosed by a support housing 25, so kept well chambered. It can be seen above all in FIG. 4a, but in a broken line also in Fig.4b that the respective support housing 25 for the seal 19 together with this transverse to the longitudinal extent of the seal 19 and thus also in the transverse direction to the narrow sides 5 and 15 adjustable and adjustable and especially towards the Opening flap 2 and 18 is adjustable, in which the retaining screws 26 solved for the support housing and this, for example shifted in the direction of appropriately arranged elongated perforations can be.

In Fig. 4 and 7 on the one hand and especially in Fig. 5 and 5a on the other hand, it is indicated that the transverse or perpendicular to the Pivot axes 2 of the opening flap 2 and 18 running narrow sides 27 of the opening flap seen in cross section with its outer and Form a right angle on the inside and the edges of the Emptying opening are shaped accordingly and that in the area of this approximately at right angles arranged narrow sides 27 on the outside Edge 19 of the drain opening on the container 1 seals 19 are provided are those with counter or pressure surfaces inclined relative to them 22 cooperate in the sense that when you close the Opening flap 2 and / or 18 increasingly due to this relative inclination are compressible, as is also the case with the seals 19 on the first narrow side 5 and the second narrow side 15 is the case. If necessary, the seal could also be on the opening flap be provided.

5 shows the closed position in the left part, in which the counter or pressure surface 22 one on the outside of the Opening flap located stop bar 21 on the seal 19 compresses the sealing surface in an oblique direction, while in right part of Figure 5, the opening flap with its stop bar 21 and their counter surface 22 already in the open position is pivoted that the seal 19 and its sealing surface 20th are released.

With a rectangular opening flap 2 it is on all four Narrow sides have an effective seal that when closing the opening flap automatically by appropriate stripping Edges of the opening flap is cleaned and its sealing surface in Cross-section seen essentially vertically or downwards runs, so that practically no material will adhere to it can stay. If this should happen, however, the seal will on its sealing surface 20 when closing the opening flap in the already described stripped with their inner edges and thus cleaned automatically.

It is on these seals and in particular on the seal 19 in the area of the first narrow side 5 as particularly advantageous to see that first when closing the opening flap automatic cleaning takes place through the edge 12 of the narrow side 5, then the gradual increase in compression the seal 19 due to the slightly different slope of the Pressure surface 22 takes place opposite the sealing surface 20.

The bulk container especially for building materials or building material mixtures has at least one about an approximately horizontal pivot axis 3 pivoting, usually rectangular opening flap 2 for Closing a lower discharge opening. The pivot axis 3 is located near or parallel to a first narrow side 5 of this opening flap 2 and this first narrow side 5 is over at least a part of their cross section arranged obliquely, so that they with the surface of the outside 8 of this opening flap 2 forms an obtuse angle. The container or emptying opening has a matching counter bevel on the corresponding edge, so that the first narrow side 5 of the opening flap 2 and this Counter bevels 6 of the discharge opening in the use position at least partially parallel to each other. The obtuse angle on the first narrow side 5 is chosen so that the course this oblique narrow side 5 on the from this narrow side Opening and closing described circle 9 about the pivot axis 3rd is at least approximate.

Claims (11)

1. A bulk goods container, especially a container (1) for building materials or building material mixtures, with at least one especially rectangular opening flap (2) which can be swivelled about a swivelling axis (3) to close an emptying opening of the container (1), wherein at least the first narrow side if this opening flap (2), which is adjacent or parallel to the swivelling axis (3), is configured to slope over at least a part of its cross-section and encloses an angle which deviates from 90° between itself and the surface of the opening flap (2), wherein the container or emptying opening has a counter-slope (6) which matches it in such a way that the first narrow side (5) of the opening flap (2) and the counter-slope (6) of the emptying opening extend approximately parallel to one another, at least in part, when in the position of use, wherein the first narrow side (5) of the opening flap (2), disposed obliquely in cross-section, encloses an obtuse angle with the surface of the external side (8) of this opening flap (2) and wherein the course of this narrow side (5) at least approximates the circle (9) described about the swivelling axis (3) of the opening flap when opening and closing, characterised in that the cross-section of the counter-slope (6) of the emptying opening, fitting together with the external side (10) of the container (1), encloses an acute angle, that the opening flap (2) is sealed with regard to the emptying opening by means of at least one seal (19) and that the seal (19), as a sealing strip, is disposed on the external side adjacent to the groove between the closed opening flap (2, 18) and the counter-slope (6, 17), and its effective sealing surface (20), when seen in cross-section, extends in the area of the swivelling circle (9, 16) or swivelling cylinder described by the narrow side (5, 15) of the opening flap (2) and/or a detent bar (21) adjacent thereto, wherein the sealing surface (20) and/or the counter-surface (22) touches this swivelling circle (9, 16) or swivelling cylinder or intersects it at an acute angle.
2. A bulk goods container according to claim 1, characterised in that when seen in cross-section, the slanted first narrow side (5) of the opening flap (2) encloses an acute angle with its internal side, the edge (12) of which serves as a scraper, at least on the counter-surface (6) when swivelling into the closed position.
3. A bulk goods container according to one of claims 1 to 2, characterised in that the second narrow side (15) of the opening flap (2) which extends parallel to the first narrow side (5) which is adjacent to the swivelling axis (3) also has a cross-sectional shape which extends approximately obliquely to the external side (8) of the flap (2), especially approximating the circle (16) described by it when swivelling about the swivelling axis (3) and that on the emptying opening or on a further opening flap (18), the counter-slope (17) which is contacted by the second narrow side (15) in the closed position has a matching cross-sectional shape extending approximately in parallel.
4. A bulk goods container according to one of claims 1 to 3, characterised in that the second narrow side (15) encloses an oblique angle with the external side of the opening flap (2) and an acute angle with the internal side of the opening flap (2) and the edge (12) disposed between the narrow side (15) and the internal side (11) serves as a scraper.
5. A bulk goods container according to one of claims 1 to 4, characterised in that the cross-section of the first and/or the second narrow side (5, 15) approximately corresponds to a tangent of the respective swivelling circle (9, 16) or swivelling cylinder of these narrow sides about the swivelling axis (3) of the opening flap (2) and the narrow side(s) is (are) configured to be substantially flat.
6. A bulk goods container according to one of the preceding claims, characterised in that the opening flap has a large wall thickness and/or thickness, and that the narrow side(s) has (have) a polygonal cross-section, that is, areas with different degrees of obliqueness, wherein these areas each correspond to tangents of the enveloping circle or the enveloping cylinder which is described by the narrow side(s) when swivelling the opening flap.
7. A bulk goods container according to one of claims 1 to 6, characterised in that for polygonal shaping, the narrow side(s) and/or the counter-slope(s) have at least two flat areas disposed at an angle to one another, wherein the angle between them is obtuse.
8. A bulk goods container according to claim 1, characterised in that the seal on the outside of the container and its sealing surface (20) is disposed approximately as a continuation of the counter-slope of the emptying opening, and, in continuation of its narrow side (5, 15), the opening flap (2, 18) has, on its external side, a detent strip (21) extending approximately parallel to the narrow side and which forms an obtuse angle therewith, to work together with this seal (19), whose pressure surface (22) which faces the seal extends, when seen in cross-section, approximately obliquely to the sealing surface (20) of the seal in its position of use and somewhat displaces the seal in this position of use.
9. A bulk goods container according to claim 1 or 8, characterised in that the seal (19) is configured as a sealing strip whose sealing surface (20) extends in a substantially flat manner when relaxed and not contacted, and that this sealing strip is preferably enclosed by the sealing surface (20) and a displacement area (24) adjacent thereto, partially or completely apart from a supporting housing (25).
10. A bulk goods container according to claim 9, characterised in that the supporting housing (25) for the seal (19) is moveable and adjustable together with this, especially in the direction towards the opening flap (2, 18).
11. A bulk goods container according to one of claims 1 to 10, characterised in that the narrow sides (27) of the opening flap which extend transverse or at right-angles to the swivelling axis (2) of the opening flap (2, 18), seen in cross-section, form a right-angle with their external and internal sides, and the edges of the emptying opening are formed to as to match them, and that seals (19) are provided in the area of these narrow sides which are approximately disposed at right-angles, preferably externally on the edge of the emptying opening or the opening flap, these seals working together with counter-surfaces (22) which are angled relative thereto, so that they can be increasingly compressed when the opening flap (2, 18) is closed by this relative obliqueness.

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