STACKABLE CONVEYOR CONTAINER
FIELD OF THE INVENTION The present invention relates in general to a stackable transport container according to the general idea of claim 1, and especially to a transport container that is shaped so that being in a state completely filled with articles can Stacking on other transport containers or being in an empty state can be introduced into other transport containers. BACKGROUND OF THE INVENTION Transport containers for bread and similar foods from a large bakery to small vending shops, which are therefore also known as bread baskets, have long been known. These known conveyor containers generally have a bottom, as well as a front wall, a rear wall and two side walls that face each other, extending upwards from the bottom at a right angle, to form a receiving area upwards. The upper edges of the front wall, the rear wall and both side walls are formed with a type of flange that is formed to engage with protrusions that are formed on the bottom side of the container bottom of a transport container that is located above , when two of those conveyor containers are stacked together; In this way two conveyor containers can not move relative to each other, since the protrusions on the lower side of the container bottom of the upper conveyor container engage with the flange on the upper edges of the upper wall, the rear wall and the side walls of the container. Lower transport container. This transport container is generally used for the delivery of items. For this the transport containers are stacked one on top of the other and then for example they are transported from a large bakery to the individual vending shops. The empty transport containers are subsequently transported back to the large bakery. The advantage of these conveyor containers is that when they are empty they can not be introduced one over the other in a compact way, therefore the transport volume of the filled transport containers (volume full of products) is equal to the transport volume of the containers. Conveyor containers (empty volume of products). To overcome these disadvantages, transport containers were developed which can be applied one on top of the other and can also be introduced into each other. Such transport containers can be stacked together in a state completely filled with articles, where in general the lower bottom surface of an upper transport container is on the upper rims of the side walls of a lower transport container . With this for each of the transport containers a relatively large transport volume (volume full of products) is required, which corresponds approximately to the product of the bottom surface and the height of the side walls of such a conveyor container. . If these transport containers are to be transported in an empty state, then naturally the transport volume of the empty transport container (empty volume of products) is kept as small as possible. For these reasons the side walls of those known conveyor containers are tilted slightly outwards, in order to compactly introduce the empty conveyor containers into one another. In this way a full volume ratio at an empty volume of about 2: 1 can be obtained. It is clear that those known conveyor containers must be constructed so as to be able to acquire the stacked state as well as in one introduced state on top of the other. Various proposals have already been made for this in the state of the art. For example, documents E 0 250 674 and EP 0 553 932 can be mentioned. Another conveyor container is known from DE 100 26 149. That stackable transport container in the arrangement shown has a bottom, a front wall, a rear wall, a left side wall and a right side wall, to form an upwardly open receiver. In addition, on the left side wall and on the right side wall there are provided four grooves in the form of channels, which have upper openings and bottoms. On the outer side of the left side wall as well as on the outer surface of the right side wall four sliding pins are formed, wherein in the horizontal direction the spacing between the sliding pins have a mirror symmetrical shape and are different from the spacing of the upper openings of the slots. Due to the fact that in the horizontal direction the distances between the four sliding pins have a symmetrical mirror conformation and that they are different from the separations of the upper openings of the slots, it is ensured that the horizontal arrangement of two transport containers placed one above the other. the other, not all four sliding pins of the conveyor container can simultaneously be inserted into the upper openings of the slots of the conveyor or lower container, thereby preventing an inadvertent introduction of the upper conveyor container into the lower conveyor container. As a consequence, the upper conveyor container can only be introduced by a type of immersion movement in the lower conveyor container (one condition inserted inside the other). By means of the shaping and arrangement of the four slots and the four slide pins, it is also possible that the transport containers can be stacked one on top of the other or inserted into each other in an opposite orientation to each other. This transport container known from DE 100 26 149 also has a series of disadvantages. By means of the conformation with four sliding pins and four slots, in which the separations between the sliding skids are mirror symmetrical, an introduction in opposite orientations is possible (this is introduction from the front or from the rear). However, in many cases it is not desired to allow an introduction from opposite directions, since the transport container must then be removed or unstacked also in the opposite directions, which is precisely different when in an empty warehouse or in the loading area of the container. a cargo truck, there are several stacks of empty transport containers inserted into each other. In the case of a narrow storage of the conveyor container stacks, it is advantageous when the conveyor containers can only be extracted in one direction (this is in front). However, one of the conveyor containers in a pile in the wrong direction is then not easily removable backwards, because the pile behind or the wall behind it makes it impossible to remove it. As a consequence, the entire battery must be pulled forward, to enable a backward extraction. It has also been established that the automatic stackers to stack automatically in different directions are clearly complicated and consequently more expensive than the automatic stackers that only stack in one direction. It is theoretically theoretically conceivable to provide in the transport containers, for example color markings, in order to give the packing personnel a clearly visible indication in which direction the known transport containers should be introduced.; however, it has been shown that these measures are extremely prone to failures. Another disadvantage of the transport containers known from DE 100 26 149 is that sliding skids, due to the possibility of being stacked or unstacked in opposite directions, can not have reinforcements since these reinforcements prevent the introduction of at least one address. When, for example, a reinforcement in the form of a rib adhered to the sliding pin is provided, then it should be shaped in such a manner to coincide with the conformation of the corresponding channel-shaped groove of a conveyor container located below. But if, nevertheless, the upper conveyor container is introduced in the opposite direction (erroneous), then the reinforcing ribs are hinged on the sliding pins with the corresponding grooves. When the missing reinforcements all the conveyor container must be produced entirely of a synthetic material reinforced with glass fibers, to ensure a sufficient stability especially of the sliding skids. With this, however, the costs of materials or production of such a conveyor container are increased. SUMMARY OF THE INVENTION Therefore, the present invention proposes the task of producing containers that can be stacked or introduced one into the other in several planes, with the help of which the aforementioned advantages of the transport containers according to the state can be overcome. of the technique. It is a special task of the present invention to provide a toner container that is shaped in such a way that a secure stacking can be made possible or ensured, so that the stacked transport containers can not be inadvertently introduced into each other. . Another main task is to present a transport container, which can be introduced into one another or stacked only in one direction. Also the sliding pins must be reinforced by means of suitable measures in such a way that an inexpensive, stable material can be used for the production of the transport container. Also the transport containers according to the invention are compatible with the aforementioned bakery trays. Finally, the containers according to the invention must not have moving parts and must be easy to clean. These tasks are solved by means of a transport container with the features of claim 1. Advantageous and preferred embodiments of the transport container according to the invention are presented in the dependent claims. To illustrate the state of the art, a container for transporting bread and similar foods was described. However, it is clear that the transport container according to the invention can also be used in other sectors and according to its size, its use and the materials used and that there are no limitations of any kind. Thus the transport container according to the invention can be used for the transport of bread, vegetables, meat and eggs. Likewise, the transport container according to the invention to be used also for transporting parts of machinery or construction materials can be formed in the form of a large steel container. The conveyor container according to the invention has a bottom, a front wall, a rear wall, a left side wall and a right side wall, which may be slightly inclined outwards, so as to form a receiving area open at the top. The front wall and the rear wall may have a lower height than both side walls; but nevertheless they have the same height. The left wall and the right wall (as well as alternatively also the front wall and / or the rear wall) can also have a stepped shape, wherein said walls have a first essentially vertical lower wall section as well as a second substantially vertical upper wall section, wherein the lower and upper wall sections are joined by means of a connection section extending outwardly slightly inclined . As a consequence, under the lower wall sections, essentially essentially rectangular cross-sections extend, which is greater than the horizontal, in essence it is a transverse surface extending through the upper wall sections.
In addition, the lower and upper pairs sections have dimensions such that the lower part of one of the conveyor containers formed by the lower wall sections can be introduced into the upper section formed by the upper wall sections of a conveyor container located below. , this is the external measurements of the lower parts correspond essentially to the internal measures of the upper part or are somewhat smaller. Approximately at the height of the connecting section on the outer side of the side walls and alternatively of the front and / or rear walls, a horizontal flange is formed. When two conveyor containers are inserted into one another, preferably the lower side of the horizontal flange is Paola on the upper side of the upper wall sections of the side walls or the front and / or rear walls. By means of this mode the stability of the transport container is increased. In addition, the transport containers can be introduced better one inside the other and it is not so easy for them to bend when they are in that state. In the left side wall and in the right side wall are formed at least two grooves, the upper ones have openings in the upper edges of the side walls and the lower ones have closed stops. These slots are open towards the interior of the transport container and therefore can be accessible. As a consequence, the grooves extend from the upper edge of the side walls, where the grooves are open and accessible, down to the groove stops in question, which are located approximately in the middle of the side walls and preferably in the half inferred from the side walls. These grooves can be formed as channels on the interior surface or on the inner side of the side walls in question or extend in the form of slits completely through the side walls, whereby among other things a smaller inclination of the layers is possible. side walls. The grooves, however, can also be formed by rib-shaped protuberances on the inner side of the side walls or by means of laterally displaced placement of different side wall sections or on another form known to the person skilled in the art.
Furthermore, on the outer side of the left side wall and on the outer surface of the right side wall, at least two sliding pins are formed, the number of the sliding pins on the outer side in question is equal to the number of the grooves formed on the side walls. These slide pins are placed at approximately the height of the bottom of the transport container, in order to obtain a good bond at the bottom, which is preferred for reasons of stability. The slide pins are generally formed in such a way that the slide pins of an upper conveyor container through the upper slot openings can be inserted into the grooves of a conveyor container located below. The grooves are further shaped such that the slide pins of the upper conveyor can slide into the grooves of the lower conveyor container, down to the stops for grooves, when two conveyor containers are coupled. Furthermore, at the outer ends of the sliding pin container, protrusions protruding downwards can be formed to engage a protruding edge or with a channel, which is formed on the upper surface of the upper walls of a conveyor container which is located at the top. below, when both transport containers are stacked together. This prevents sliding better unnoticed of both transport containers. Also, the upper surfaces (bearing surfaces) of the slot stops can have shaped edges suitable for being stacked to engage the lower protuberances on the slide pins to obtain greater stability in a stacked condition. In a first embodiment of the conveyor container according to the invention in the horizontal direction the separations between the sliding pins are different from the distances of the upper openings of the grooves. This ensures that the horizontal position and the vertical arrangement of two transport containers stacked together, this is both conveyor containers are coupled together stacked as well as horizontally and parallel, not all the sliding pins of the upper conveyor can be inserted in all the upper openings of the slots of the transport container, thus avoiding an inadvertent introduction of the upper conveyor container in the lower conveyor container. Instead, the openings in the slots and the sliding pins are placed in such a manner that the container can only be introduced into the lower conveyor container by means of a type of immersion movement (to arrive at the state in which one is inside the other). For this the upper conveyor container is inclined in comparison with the lower conveyor container around a horizontal axis extending transverse to both side walls, and the forward (or further rear) slide pins are inserted into the slot opening up to forward of the transport container that is below and moves down in the slot. In this way the next sliding pin is accommodated in the next slot opening and by means of the continuous insertion movement it can be introduced into the corresponding slot. When more than two slots or slide pins are provided on each side of the conveyor container, then the third slide pin in the third slot may also be introduced subsequently. In this way, the sliding pins of the upper conveyor container can be sequentially introduced into the corresponding grooves of the lower conveyor container only by means of the described insertion movement, and that is until the slide pins against the lower slot stops of the groove in question. It is clear that the separations of the slide pins are equal to the separations of the slot stops, to make possible in the stacked state (that is in a horizontal, parallel arrangement of two transport containers placed one above the other) a horizontal arrangement of the upper conveyor container in the lower conveyor container. In a second embodiment of the conveyor container according to the invention in the horizontal direction the separations between the sliding pins in the essential is equal to the separations of the upper openings of the grooves. It is this second embodiment on the upper surfaces of the left side wall and on the outer surface of the right side wall when at least three sliding pins are formed, wherein the middle sliding pin (s) is shorter and preferably thicker than the pins external sliders. The cross sections of the grooves or of the upper openings of the grooves, whose number is equal to that of the sliding pins, are shaped correspondingly. This is the slot openings and the grooves have such dimensions, that the external sliding pins only fit in the slot openings or in the outer grooves and the internal (middle) sliding pins only fit in the slot openings or in the internal grooves (socks) . In other words, the slot openings or the outer grooves are deeper and can preferably receive somewhat narrower slide pins, in order to receive longer and preferably narrower outer slide pins, and the slot openings or outer grooves are flatter and preferably wider to be able to receive the shorter and preferably thicker means of sliding pins. Of course the more average sliding pins can also be longer and / or thinner than the outer sliding pins, the openings correspondingly being formed slot or in the outer slots. It should be noted that other forms of slots and slide pins are also possible. It is now important that the various slide pins and grooves are shaped in such a way that the slide pins only fit in the outer grooves and preferably the slide pins only fit in the internal grooves. It should also be noted that the conformation or arrangement of the slots and the sliding pins is symmetrical. By means of the properties described above it is obtained that two transport containers placed one above the other according to the second embodiment of the invention, the sliding pins of the upper transport container can only be inserted into the slot openings or in the outer grooves of the lower conveyor container, when the slide pins of the upper conveyor container are aligned with the corresponding corresponding slot holes of the lower conveyor container. When an upper conveyor container is also pushed by means of the stack onto a lower conveyor container, the forward sliding pins in the advancing direction of the upper conveyor container due to their longer length do not inadvertently slip into the medium flat slot openings. In the same way a thicker middle slide pin can not inadvertently slip into the narrower outer slots. This prevents the slide pins of the upper conveyor container from entering the upper slots of the erroneous slots of the lower conveyor container by pushing the upper conveyor container over the lower conveyor container. When therefore an upper loading container according to the second embodiment of the invention is pushed onto the lower conveyor container for stacking, then the sliding pins of the upper conveyor container slide in the advancing direction on the flat slot openings of the container. lower conveyor container, without entering them. When then the front (outer) conveyor containers of the conveyor container are aligned with the corresponding deeper (outer) groove openings of the lower conveyor container, then all the other slide pins of the upper slide pins are also aligned with the same. slot openings of the corresponding lower conveyor container and they can all slide simultaneously in their corresponding slots, in order to be able to introduce the upper conveyor container in the lower conveyor container. It is clear that the upper conveyor container in this way can be introduced into the lower conveyor container without the insertion movement described above. When the slide pins of the upper conveyor container are aligned with the lower conveyor container, the upper conveyor container can then move vertically without pivoting movement or in a downward diagonal movement, whereby the sliding pins of the upper conveyor container slide. simultaneously in the grooves of the lower conveyor container, which is advantageous for stacking and unstacking. It is clear that this described shaping of the slots and of the slide pins can also be used in a transport container according to the first embodiment. Furthermore, in both embodiments of the conveyor container according to the invention, preferably in the upper edges (that is the flange) of the right side wall and the left side wall, recesses are formed, whereby the sliding pins of an upper conveyor container can enter the recesses of a conveyor container that is below (unstacked state), so that both transport containers so stacked can not move with each other. In order to make it possible to insert the sliding pins of the conveyor container into the recesses of the lower conveyor container, the separations of the recesses must be equal to the separations of the sliding pins. When, as described above, protrusions protruding downwards are formed at the lower ends of the slide pins, to engage with a protruding edge or with a channel, which is formed on the surface of the side walls of a transport container which is find below, when both transport containers are stacked, then preferably the recesses are provided with those edges or channels, to avoid an inadvertent lateral expulsion of the sliding pins in the direction towards the interior of the transport container or to prevent both transport containers from slipping between them. In the case of the second embodiment of the transport container according to the invention, the cross sections of the recesses are adapted to the corresponding slide pins, so that for example a longer outer slide pin of an upper conveyor container can not slide in a short half notch. As already described above, also in the case of the second embodiment, the protuberances and the edges or channels can be provided on the slide pins. When in the second embodiment an upper conveyor container for stacking is pushed onto a lower conveyor container, the forward sliding pin in the advancing direction of the upper conveyor container due to its longer length can not inadvertently slip into one of the flat slot openings stockings or in one of the half flat notches. A thicker middle slide pin can also not inadvertently slip into one of the narrow outer slots or in one of the narrow outer recesses. This also prevents the sliding pins of the upper conveyor container from slipping into incorrect recesses of the lower conveyor container, thereby preventing a hooking of the sliding pins of the upper conveyor container in the wrong recesses of the lower conveyor when pushing the container upper conveyor on lower conveyor container. When therefore an upper conveyor container according to the second embodiment of the invention is pushed onto the lower conveyor container to obtain a stacking, then the longer forward sliding pin is slid in the advancing direction of, upper conveyor container passing through the flat slotted openings measured in the lower conveyor container can not be inserted into them. When then the longer front (outer) sliding pins of the upper conveyor container are aligned with the corresponding lower (outer) lower notches of the lower conveyor container, then all the other slide pins of the upper conveyor container are also aligned with their corresponding recesses of the lower conveyor container and can all slide simultaneously in their corresponding recesses, in order to be able to stack the upper conveyor container on the lower conveyor container. Preferably the dimensions and the conformations of the bottom and of the slide pins in both embodiments are selected in such a way that a top conveyor container according to the invention can be stacked on a known bakery tray. For this, the bottom and the sliding pins of an upper conveyor container according to the invention are coupled to the flange of a lower bakery tray. The upper edges of the side walls and the front and rear wall of the conveyor container according to the invention are dimensioned in such a way as to be coupled with the peripheral edge of the bottom and with the protuberances which are on the underside of the bottom of a bottom. Upper bakery tray. In this embodiment the conveyor container according to the invention is compatible with the known bakery trays and can be stacked with it in a combined manner; However, a provision introduced in the bakery trays can not be obtained. In the outer sections of the corners of the upper surface of the rim, elevations or protruding edges are preferably formed, by means of which the displacement of a known upper bakery tray on the rim of a lower conveyor container according to the invention is prevented. . This is especially important in the case of conveyor containers according to the invention, which have a front and / or rear wall trimmed downwards. Preferably two, three or four slots, recesses and sliding pins are formed in each side wall. From the above considerations it is clear that the grooves extend inclined in comparison with the vertical, are slightly curved and have different inclination and conformation. The conformation, inclination and exact curvature of the grooves of the groove openings in the upper edge of the side walls to the top of the grooves depends on the desired type of insertion movement, the number and spacing of the sliding pins, etc. In the first embodiment of the conveyor container according to the invention the grooves in a side wall each have different conformation, inclination and curvature, the corresponding opposite grooves in the other side wall being identical. In other words, the grooves in one side wall all have different shapes, both side walls being identical or symmetrical. The exact conformation, inclination and curvature of the grooves of the groove opening in the upper edge (flange) of the side walls to the top of the grooves depends on the desired type of insertion movement, the number and spacing of the sliding pins as well as slot openings, etc. In the case of the second modification of the conveyor container according to the invention, the grooves extend equally inclined towards the vertical, but essentially have an identical shape and orientation with respect to each other. The exact conformation, inclination and curvature of the grooves of the groove opening in the upper edge (flange) of the side walls to the groove stop depends on the desired number and spacing of the sliding pins or groove openings, etc. . Preferably the lower groove stops of a groove and the corresponding recesses above and the sliding pins are real aligned with each other. The essential advantage of the conveyor container according to the invention consists consequently in the special shaping and placement of the slots or slits as well as the sliding pins, thereby ensuring a safe and accurate stacking of the transport containers filled with products, and simultaneously, it avoids or at least makes it difficult for the transport containers to be stacked when they are inadvertently introduced into each other or introduced into each other in the wrong direction. Another essential advantage of the conveyor container according to the invention is that the sliding pins are reinforced with ribs, the sliding pins being constructed with rib-shaped appendages extending in the direction of the grooves. The grooves can also be formed inside the side walls by means of channels, whose walls in the outer walls of the side walls serve as reinforcing ribs, wherein the thickness of the material of those channels at least in some positions is more thicker than the other wall areas. This forms reinforcing ribs that essentially have the shape and conformation of the grooves. The side walls of the channels can extend inclined to make possible a better coupling of the grooves of a lower container with the ribs of an upper container. In addition, the thickness of the ribs may be thicker at or near the slide pins and then slowly reduced. The advantage of this conformation is that the sliding pins obtain a clearly greater stability, which makes it possible to use cheaper and less stable materials but also makes possible a smaller wall thickness with the same material, to reduce the weight of the container. When the insertion or removal should only be possible in one direction, the symmetrical arrangement of the slide pins can be avoided. With this it is possible to provide the transport containers with only two or three slide pins or slots in each side wall (four and more slide pins are naturally possible as well). With this the production of the complete transport container is less complex and simpler. By using two slide pins and two slots on each side of the container, the packing staff immediately recognizes the correct direction of insertion. Moreover, the insertion in the wrong direction is prevented on the one hand by means of the different separations between the sliding pins and the grooves, as well as by means of the reinforcing ribs, which extend towards the grooves. When using three and more slide pins or slots the separations of the sliding pins are not symmetrical; they can for example increase stepwise seen in one direction. Another important feature is that the upper surface of the flange has a guide groove, in which the sliding ribs of the sliding pins of a corresponding upper container can move. This means that a groove with a substantially V-shaped cross-section is formed in the upper support surfaces of the flange of the side walls, wherein in general the external internal wall of the groove essentially extends perpendicularly and the wall internal extends inclined. Sliding ribs are formed on the underside of the slide pins, which have a corresponding transverse section. This shaping has the advantage that the stacked arrangement of two containers, the inclined surfaces pointing inwardly of the sliding ribs in the sliding pins of the upper container rest on the inclined surfaces that point outwardly from the guide groove and by medium of the load (articles in the upper container) the side walls of the lower container are compressed. Thus it is easily possible to stack more than 15 transport containers full of products, without compressing the side walls of the lower conveyor container which extend slightly inclined outwards. This is very important precisely in the case of the effects of heat for example when drying the items that are in the containers. In the case of containers with three or more (for example four) sliding pins and grooves in each side wall it is preferred that the middle sliding pin (s) be positioned a little more deeply than both outer sliding pins, so that only the pins sliding means extend in the guide groove of the rail described above, wherein these sliding pins are provided with the sliding ribs that extend ending in a point, extend towards the correspondingly formed guide groove, in the case of force application from above produce a compression of the side walls or avoid destruction of the side walls. Another advantage of the transport container according to the invention is that a good proportion is obtained between the volume filled with products and the empty volume. This is because the volume of the stacked transport containers is relatively large compared to the volume of the transport containers introduced into each other. This good filled / empty ratio is preferably 2: 1 or less and is obtained when the side walls and the front or rear wall of the transport container according to the invention in relation to the vertical are only slightly inclined, whereby the transport container according to the invention obtains a very large filling volume. By means of the formation of slits or grooves in the side walls simultaneously it is achieved that the transport containers can be introduced deep into each other. Yet another advantage of the transport container according to the invention is that there are no moving parts that can break. Furthermore, the transport container according to the invention is very compatible with other transport containers. Finally, the transport container according to the invention is easy to clean. BRIEF DESCRIPTION OF THE FIGURES Preferred embodiments of both embodiments of the invention are described with reference to the attached drawings, in which: Figure 1 shows a schematic perspective view of a first embodiment of the first embodiment of the containers conveyors stackable together or insertable one into another according to the invention, in which the shapes of the grooves are only schematically represented; Figure 2 shows a schematic perspective view of a second embodiment of the first embodiment of transportable containers stackable together or insertable one in another according to the invention, in which the shapes of the grooves are only schematically represented; Figure 3 shows a schematic front view of two t holding containers according to the invention of Figure 2, which are shown in a stacked arrangement with each other; Figure 4 shows a schematic front view of two transport containers according to the invention of Figure 2, which are vertically separated from each other; Figure 5 shows a schematic front view of two transport containers according to the invention of Figure 2, which are placed stacked together but slightly offset from each other; Figure 6 shows a schematic side view, similar to Figures 4 and 5, of two transport containers according to the invention, which are placed one above the other separated and in an orientation opposite to Figures 4 and 5, where the grooves formed in the walls are directed in the opposite direction; Figure 7 shows a schematic side view of two transport containers according to the invention with opposite orientations that are in their disposition one within the other, wherein the grooves formed in the side walls of the transport container are directed in opposite directions; Figure 8 shows a view similar to that of Figure 7, however the grooves formed in the side walls extend in the same direction; Figure 9 shows a schematic side view of four conveyor containers according to the invention that are in one arrangement one inside the other, wherein the grooves formed in the side walls of the three lower conveyor containers are directed in the same direction; Figure 10 shows a schematic side view of five conveyor containers according to the invention which are in one arrangement one inside the other, wherein the grooves formed in the side walls of the lower conveyor containers in the different containers t ansportadores are directed in opposite directions; Figure 11 shows a schematic representation in the stepped placement or insertion of a top conveyor container into a conveyor container that is below; Figure 12 shows a schematic representation in which it is shown how the outer sliding pins of an upper container are introduced stepwise into the grooves of a conveyor container that is located below, to place the upper conveyor container in another arrangement in relation to the container the lower donor in a provision in which one is introduced in the other; Figure 13 shows a schematic representation of a third embodiment of the first embodiment of the transport container according to the invention, in which the front wall and the rear wall have a lower height than the side walls; Figure 14 shows a schematic representation of an embodiment of the second embodiment of the transport container according to the invention; Figure 15a shows a top view on the conveyor container of Figure 14; Figure 15b shows a front view on the transport container of Figure 14; Figure 15c shows a side view on the transport container of figure 14 additionally with different grooves formed; Fig. 15d shows a detail of a front view of Fig. 14 on a larger scale; Figure 16 shows a schematic representation of a transport container according to a third embodiment with a special stepped conformation of the side walls, the front wall and the rear wall; Figures 17a and 17b show a schematic top view and a cross-sectional view of the slide pins; Figure 18 shows a schematic cross-sectional view of a side wall of the transport container shown in Figure 16; Figure 19 shows a schematic and not to scale side view of the conveyor container shown in Figure 16, in which slots and sliding pins formed in the side walls are shown, as well as a schematic cross-sectional view along the line AA, by means of the formation of the grooves in the side walls; Figures 20a and 20b show a schematic representation of a transport container according to another preferred embodiment of the present invention; Figures 21a and 21b show a schematic representation of a conveyor container according to a variation of the embodiment of Figures 20a and 20b according to the invention; Figures 22a and 22b show a schematic representation of a transport container according to a variation of the embodiment of Figures 20a, 20b, 21a and 21b according to the invention; and Figure 23 shows a schematic representation of an embodiment of the sliding pin and the guide groove. DESCRIPTION OF THE INVENTION Figure 1 shows a schematic perspective view of a first embodiment of the first embodiment of the transportable containers 1 stackable together or insertable one into another. That transport container
1 has a bottom 2, which can have a continuous surface that can alternatively be provided on the underside with bridges, to increase the stability of the bottom. Alternatively the background
2 can also be perforated or have a cellular or grid-like structure. Background 2 is preferably rectangular, but may also have rounded or otherwise shaped corners. From the bottom 2 of the conveyor container 1 a front wall 3, a rear wall 4, a left side wall 5 and a right side wall 6 extend, so as to form a reception area. The bottom 2, the front wall 3, the rear wall 4, the left side wall 5 and the right side wall 6 are preferably made of synthetic material, but other materials can also be used. The front wall 3, the rear wall 4, the left side wall 5 and the right side wall 6 are preferably inclined slightly outwards, to make possible a single transporter container 1 that can be inserted into another one. On the inner surface of the left side wall 5, four grooves 7a, 7b, 7c and 7d are formed, which are inclined with respect to the vertical. On the inner surface of the right side wall 6 are formed corresponding grooves 8a, 8b, 8c and 8d, which are inclined with respect to the vertical with the same orientation, as the grooves 7a, 7b, 7c and 7d which face each other in the inner surface of the left side wall 5. The grooves 7a-7d and 8a-8d are only shown schematically; in a special way the inclination of these individual slots will be detailed later. In the upper edges of the front wall 3, the rear wall 4, the left side wall 5 and the right side wall 6, there is a wide peripheral edge or a flange 9, which preferably has a rectangular cross section. Alternatively it is possible that mainly the upper edges of the left side wall 5 and the right side wall 6 are formed with a flange 9 or with a wide edge of that type. The flange 9 on the upper edge of the front wall 3 and the rear wall 4 preferably serves to increase the stability of the transport container 1. As can be clearly seen in figure 1, the slots 7a-7d of the left side wall extend. 5 and the grooves 8a-8d of the right side wall 6 upwards to the upper surface of the flange 9 and are closed downwards, to form at the lower end of the grooves 7a-7d, groove stops 10a-10d and in the lower end of grooves 8a-8d groove stops lla-lld (not shown). The slot stops 10a-10d and lla-lld are all in a horizontal plane. Four sliding pins 12a-12d (not shown) are provided on the outer surface of the left side wall 5 and four sliding pins 13a-13d are provided on the outer surface of the left side wall 6. These sliding pins are preferably located in the lower area of the outer surface of the side walls at the height of the bottom or slightly above and they are all equally in a horizontal plane. The slide pins preferably have a round cross section, but may also have a rectangular cross section, extend in a horizontal direction and are preferably rounded at their outer ends. Furthermore, on the outer surface of the left side wall 5 at their ends close to the front wall 3 or near the rear wall 4 at the height of the bottom are provided fastening pins 14a, 14b (not shown), and on the outer surface of the right side wall 6 at its ends close to the front wall 3 or near the rear wall 4 at the height of the bottom are provided with fixing pins 15a, 15b. In addition, four recesses 16a-16d or 17a-17d are provided on the upper surface of the rim 9 of the left side wall 5 and on the right side wall 6. The recesses preferably have a semicircular cross section or a cross section that is adapted to the cross section of the sliding pins. The function of the slots, the slide pins and the recesses will be described in detail later. Figure 2 shows a second embodiment of the first embodiment of the transportable container 20 that can be stacked or inserted in another, wherein in the figures the same reference numbers are used to refer to the same elements. The essential difference between the conveyor container 1 of the first embodiment of FIG. 1 and the conveyor container 20 of the second embodiment of FIG. 2 consists in that the grooves 7a-7d in the left side wall 5 and the grooves 8a- 8d on the right side wall 6 extend completely through the side walls and form slits or fissures. In the description of the following figures 3 to 13 there is talk of grooves, being able to use in those figures they can be non-crossing grooves, as in figure 1, as well as through grooves, as in figure 2. The advantage of the through grooves ( slits) is that the material of the side walls can be thinner and the side walls must be less inclined. When, however, for example, it is necessary for the water container to form a waterproof tub, then it is required to use non-crossing slots. Figure 13 shows a third embodiment of the first embodiment of the transport container 30. The only difference with the transport containers of figures 1 and 2, is that the front wall 3 and the rear wall 4 have a lower height that the side walls 5 and 6. The advantage of this shorter front or rear wall 3,4 is that a deeper insertion of the transport container is possible. The grooves can have a conformation as shown in figures 1 or 2. As can be seen further in figure 2, the grooves 7a-7d or 8a-8b at the height of the flange 9 are not through, so that a section The exterior of the rim remains in the area of the grooves, in order to raise the stability of the conveyor container 20. Otherwise, the conveyor container 20 is similar to the conveyor container 1. Preferably, holes are provided in the front wall 3 and in the rear wall 4. 18, 19, which serve so that the container 20 can be held and carried more easily with the hands. Additionally in the side wall either below the slots or between the slots, other holes may be provided. The holes in the front wall, in the rear wall and / or in both side walls can also be present in the embodiment examples shown in figures 1 and 13. In figure 3 a front view of two transport containers 20 'is shown. , 20", which are stacked together This stacked arrangement is preferred when the conveyor containers are full of products As can be clearly seen in Figure 3, the slide pins 12a-d are in the left side wall 5 of the container conveyor 20 'in the recesses 16a-d, which are formed in the flange of the lower conveyor container 20". Similarly, the slide pins 13a-d which are formed in the right side wall 6 of the upper conveyor container 20 'rest on the recesses 17a-d, which are formed in the flange of the lower conveyor container 20". the conveyor container 20 'is thus secured against slipping in front of the lower conveyor container 20". In a similar manner other conveyor containers 20 can be stacked on the upper conveyor container 20 '. It is clear that the spacings between the individual sliding pins 12a-d or 13a-d are equal to the spacings between the corresponding recesses 16a-d or 17a-d. It is also clear that due to the type of representation in FIG. 3, the front sliding pins 12 a or 13 a and the front recesses 16 a or 17 a can be observed. Figure 3 shows a side view of two transport containers 20 'and 20", which are in a position one over the other, to be stacked together. However, for reasons of better representation, the flange 9 has been omitted in both transport containers 20 'and 20. In Figure 4 it can be clearly seen that the slide pins 13a-d in the right side wall 6 visible of the upper transport container 20 'are at the same distance from each other as the corresponding recesses 17a-d of the conveyor container 20"below. The same applies naturally for the separations of the sliding pins 12a-d in the left side wall 5 (not shown) of the conveyor container 20 'and the separations of the corresponding recesses 16a-d in the upper edge of the left side wall 5 of the This is how it can be ensured that in the stacked position all the sliding pins 12a-12d or 13a-d of the conveyor container 20 'can be inserted directly into the corresponding recesses 16a-do 17a-d of the container 201, which is located below, where the upper conveyor container 20 'and the lower conveyor container 20"are located are in an exact vertical alloy. Preferably the distance between the sliding pins 13a and 13b is equal to the distance between the sliding pins 13c-13d; that distance is preferably different from the distance between the slide pins 13b and 13c. The same applies to the slide pins 12a-12d on the left side wall of the conveyor container. The spacings between the recesses 17a-d or 17a-d are corresponding. As a result, the distances of the slide pins and the spacings between the recesses are symmetrically shaped. In this way it is possible that two or more slide pins can only be coupled with those recesses, when the upper conveyor container is in an exact vertical alloy with the lower conveyor container. This makes it possible for the upper conveyor container to be pushed onto the lower conveyor container, without the sliding pins during the movement being able to enter the erroneous recesses. If during the movement a sliding pin is aligned with an erroneous notch, then it can not be introduced into that recess since the upper conveyor container, which due to the different separations described above, is not aligned with the lower recesses, can not be supported on the top edge of the flange. Only when all the sliding pins of the upper conveyor container are aligned with the corresponding cut-outs of the lower conveyor container, is the upper conveyor container inserted, that is, all the sliding pins of the upper conveyor container are simultaneously inserted into the corresponding recesses of the conveyor container lower. In Figures 1-13 the transport containers are provided with four sliding pins, four recesses and four slots on each side of the transport container. The spacing between the sliding pins 12a and 12b (or 13a and 13b) being equal to the spacing between the sliding pins 12c and 12d (or 13c or 13 d), for example 15 cm. The spacing between the sliding pins 12b and 12c (or 13b and 13c) is different and amounts to, for example, 20 cm. The spacings of the corresponding recesses are equivalent to the foregoing. As a consequence, the separations between the sliding pins and the recesses are symmetrical. It is obvious that other quantities of sliding pins, recesses and grooves may be present. Thus for example on each side of the transport container according to the invention two, three or more of four sliding pins, recesses and grooves may also be present. With reference to the separation between the sliding pins and the recesses it is mainly important that the sliding pins of the upper conveyor container are inserted into the recesses of the lower conveyor container, when both conveyor containers are in the stacked position relative to each other. It is also important that the spacings between the sliding pins and the recesses be selected in such a way that the sliding pins of the upper conveyor container in both orientations of the conveyor containers with each other, that is in the orientation shown in FIG. 4 and in the orientation rotated by 180 ° (see figure 6), they enter the recesses of the lower conveyor container, when both conveyor containers are in their correct stacked position. As shown in Figure 4, the separations of the lower groove stops lla-d are equal to the separations of the corresponding sliding pins 13a-d. Preferably, the slit stops lla-d are in vertical alignment with the corresponding slide pins 13a-d. The same applies naturally also for the slit stops lOa-d or for the slide pins 12a-d in the left side wall 5 (not shown) of the transport container. Is Of course, those conditions also apply to a transport container that has another number of sliding pins. In Figure 4 it can further be seen that the upper holes of the grooves 7a-d or 8a-d are spaced apart from one another which is different from the distances of the corresponding sliding pins 12a-d or 13a-d. In this way the sliding pins 12a-do 13a-d are prevented in the case of a horizontal alignment of the lower conveyor container 20"and the upper conveyor container 20 'all simultaneously being placed in vertical alignment with each other. 20 'in figure 4 moves from left to right in horizontal alignment on the conveyor container 20"which is below, then they can only one or two slide pins 12a-do 13a-d in the left side wall 5 or in the right side wall 6 of the upper conveyor container 20 'align with an upper hole in the grooves 7a-do 8a-d of the left side wall or right side wall 6 of lower conveyor 20; the other sliding pins slide on the upper edge of the flange. In this way it can be ensured that the conveyor container 20 '. when moving from left to right on the conveyor container 20"which is below, for which the slide pins 12a-do 13a-d slide on the upper surface of the flange 9, they can not inadvertently assume in an arrangement introduced with with respect to the lower conveyor container 20", since the sliding pins 12a-do 13a-d can not all be aligned simultaneously with the upper holes of the grooves 7a-do 8a-d and therefore can not all slide simultaneously in the grooves 7a-do 8a-d. The shape and manner in which the lower conveyor container 20"can be aligned will be described below.Figure 5 shows the displacement described for Figure 4 of the upper conveyor container 20 'on the lower conveyor container 20". As can be seen in Figure 4, the right slide pin 13d on the right side wall 5 of the upper conveyor container 20 'is aligned with the upper hole of the slot 8d in the right side wall 6 of the lower conveyor 20"and thanks it can easily be inserted into the groove 8d in its own weight, but this is prevented by the fact that the other three sliding pins 13a, b and c on the right side wall 6 of the upper conveyor container 20 'are not aligned with the upper holes of the corresponding grooves 8a, 8b and 9c in the right side wall 6 of the lower conveyor container 20", but instead rest on the upper edge or flange 9 of the right side wall 6 of the lower conveyor 20". upper conveyor container 20 'moves further to the right, then the sliding pin 13d of the upper conveyor container 20"is supported with the upper edge of the flange 8 of the right side wall 6 of the conveyor container 20", the sliding pin 13c of the upper conveyor container 202 is aligned with the upper hole of the groove 8c of the lower conveyor container 20", while the sliding pins 13a and 13b of the upper conveyor container 20 'with the upper edge of the flange 9 of the right side wall 6 of the lower conveyor container 20". As already described above, the separations between the slide pins of the upper conveyor container and the gaps between the recesses in the lower conveyor container 20"are preferably selected in such a way that the slide pins of the upper conveyor container 20 'only engage with the recesses of the lower conveyor container 20", when all four sliding pins of the upper conveyor container 20 'are in vertical alignment with the corresponding four recesses of the lower conveyor container 20. In this case it can not happen that during the movement of the conveyor container upper 20 'towards the lower conveyor container 20"approximately three sliding pins 13b, c and d of the upper conveyor container are coupled with three recesses 17a, b and c of the lower conveyor container 20." This essentially facilitates the stacking of the container transports top 20 'on the lower conveyor 20". It is obvious that the above considerations which due to the representations in figures 5 and 6 refer to the right side walls 5 of the upper conveyor container 20 'and the lower conveyor container 20", also apply to the left side walls 6 of the container upper conveyor 20 'and lower conveyor 20", since the transport containers have a symmetrical conformation. Figure 6 is a representation, similar to those of FIGS. 4 and 5, in which the orientation of the widths of the upper conveyor containers 20 '(which extend from bottom right to top left) is different from the orientation of the container slots lower conveyors 20"(extending from bottom left to top right) Here it can also be seen that the slide pins of upper conveyor container 201 are aligned with corresponding recesses of lower conveyor container 20". The observations presented in relation to Figure 5 when displacing the upper conveyor container 20 'on the lower conveyor container 20"are naturally applied also for the orientation shown in Figure 6 of both conveyor containers 20' and 20". In figure 7 the case is shown in the lime the upper conveyor container 20 'is inserted in the lower conveyor container 20"Here it can be seen that the separations between the sliding pins 13a-d of the upper conveyor container 20' are equal to the separations between the slit stops lla-d of the lower conveyor container 20", such that the slide pins of the upper conveyor container settle into the lower closed end of the slots 8a-d of the lower conveyor 20" and are supported exactly against the groove stops lla-d of the lower conveyor 20". The case in which the orientation of the slots of the upper conveyor container 20 'is different from the orientation of the slots of the lower conveyor container 20 is shown in Figure 7. In Figure 8 the case in which the container is shown is shown. upper conveyor 200 'is inserted in the lower conveyor container 20". Here the grooves of the upper conveyor container have the same orientation as the grooves of the lower conveyor container, as shown in FIGS. 4 and 5. In this case, too, the sliding pins of the upper conveyor container 20 'are exactly coupled with the stoppers of the upper conveyor container 20'. conveyor container slot
In Figures 9 and 10 are several transport containers are inserted into each other, the orientation of these transport containers being different. From this it is clear that it is completely irrelevant in which orientation the transport containers are introduced. Contrary to the transport containers according to the state of the art in the case of the transport containers, a 180 ° turn is not required; furthermore, no moving parts are required. In figure 11 it is shown schematically how the upper conveyor container 20 'can be inserted into the lower conveyor container 20"The following description again refers only to the right side wall 6 of the upper conveyor container 20' or of the lower conveyor container 20", where it is naturally clear that these considerations equally apply to the left side walls 5 of the upper conveyor container 20 'and the lower conveyor container 20" or for the slots, the slit stops and the sliding pins, which are located in the container. Left side wall 5 of upper or lower conveyor containers 20 '20". It can be seen that the upper conveyor container 20 'is introduced in a downward inclined position in the lower conveyor container 20. For this first the front sliding pins (in figure 11 only the right sliding pin 13d upper conveyor container is shown) they are introduced into the upper holes of the front groove 8d in the groove of the lower conveyor container 20". By means of the inclined position of the upper conveyor container 20 'in relation to the lower conveyor container 20"can when the front sliding skid 13a of the upper conveyor container 20' is introduced sufficiently deep into the front groove 8a of the lower conveyor container, also the The sliding pin 13c is inserted through the upper holes of the second groove 8c in that groove 8c of the lower transport container If these sliding pins 13d and 13c of the upper conveyor container 20 'are inserted into their corresponding grooves 8d and 8c, then the sliding pin 13b of the upper conveyor container 20 'is also aligned with the slot 8b of the lower conveyor container 20"and can be inserted into it. If the upper conveyor container 20 'is still moved then at some point the sliding pin 13a of the upper conveyor container 20' also engages with the groove 8a of the lower conveyor container 20"and can be inserted into it. 'Upper can only be introduced by means of a type of insertion movement in the lower conveyor container 20". As explained above, an inadvertent introduction of the upper conveyor container into the lower conveyor container is avoided, in such a way that the articles in the lower conveyor container are prevented from being damaged. In figure 12 the insertion movement of the upper container in the lower conveyor container is again shown, where however the contour of the upper conveyor container is omitted, in order to better represent the advance movement of the sliding pins of the container upper conveyor in the slots of the lower conveyor container. By means of this type of insertion of the upper conveyor container 20 'and the lower conveyor container 20", greater stability is also obtained.An automatic unstacking of the coupled conveyor containers is also guaranteed without problems.As mentioned above, the sliding pins are slightly inclined, which facilitates the introduction of the slide pins in the slots and also the unstack (manually or automatically) In figure 14 is shown an embodiment of a conveyor container 40 according to the invention corresponding to the second embodiment The difference with the transport containers corresponding to the first embodiment of figures 1, 2 and 13 consists in that the grooves 7a-d in the left side wall 5 and the grooves 8a-d in the right side wall 6 extend inclined with respect to the vertical and all are formed essentially equal. In the upper edges of the front wall 3, the rear wall 4, the left side wall 5 and the right side wall 6 is provided with a rail 9. The front wall 3 has a somewhat lower height than the other three walls. The flange 0 on the upper edge of the front wall 3 and the rear wall 4 is preferably used to increase the stability of the conveyor container 40. As in figure 14 it can be clearly seen, the grooves 7a-7d of the left side wall 5 and grooves 8a-8d of the right side wall 6 extend upwards to the upper surface of the flange 9 and are closed downward to form groove stops at the lower end of the grooves. Four sliding pins 12a-12d (not shown) are provided on the outer surface of the left side wall 5, and four slide pins 13a-13d are provided on the outer surface of the right side wall 6. The slide pins preferably have a round cross section, may also have a rectangular cross section, extend in the horizontal direction and have their outer ends preferably rounded. Both the slide pins 12a, 12d or 13a, 13d on the left and right side walls are somewhat longer and thinner than the slide pins 12b and 12c or 13a and 13c on the left and right side walls 5,6. In the upper surface of the rim 9 of the left side wall 5 and the right side wall 6, four recesses 16a-16d or 17a-17d are also provided. The recesses preferably have a semicircular cross section or a cross section that fits the cross section of the corresponding sliding bridges. In figure 14 it can be clearly seen that the outer recesses 16a, 16d or 17a, 17d are deeper and have a smaller diameter, in order to receive in a precise way the sliding bridges 12a, 12d or 13a, 13d. Correspondingly the middle recesses 16b, 16c or 17b, 17c are flatter and have a larger diameter, in order to receive the corresponding half sliding bridges 12b, 12c or 13b, 13c. In the same way, the holes of the slots are shaped in a manner corresponding to the shape and measurements of the corresponding sliding bridges 12a-d or 13a-d. In figure 14 it can be clearly seen that the holes of the outer grooves 7a, 7d or 8a, 8d are deeper and narrower, in order to receive exactly the corresponding longer and thinner outer sliding bridges 12a, 12d or 13a, 13d . Correspondingly, the holes in the middle grooves 7b, 7c or 8b, 8c are flatter and wider, in order to receive precisely the corresponding shorter and thicker means of sliding bridges 12b, 12c or 13b, 13c. It is obvious that when an upper conveyor container 40 is placed on a lower conveyor container 40, the forward sliding skids in the forward, longer outer direction 12d and 13d of the upper conveyor container 40, slide over the flat half-notches 16b, 16c or 17b, 17c and over the holes of the middle grooves 7b, 7c or 8b, 8c and mainly can slide in the deepest and smallest outer recesses 16d or 17d or in the holes of the deepest and narrowest outer grooves 7d or 8d. In Figure 14 it can further be seen that the upper side of the flange 9 (preferably at its outer corners) is provided with projecting edges 50a, 50c and 50d. These edges are dimensioned so that with the external bottom edges a known bakery tray, which is stacked on the conveyor container 40 according to the invention, can be coupled. These 50th songs, 50c and 50d are especially important, when the front wall 3 and / or the rear wall 4 of the transport container 40 have a lower height than the side walls 5,6 and the bottom edge directed downwards of the bakery trays known not only by means of the flange of the front wall and / or the rear wall of the lower conveyor container according to the invention. In this case the edges 50a, 50b and 50c are coupled with the horizontal bottom edge directed outwardly of the bakery tray, thereby preventing the bakery tray from sliding forward or backward from the flange 9 of the container lower conveyor 40. It is obvious that the edges 40a, 50b and 50c can also be provided in those embodiments of the transport container according to the invention 1, 20 and 40 of the first embodiment. Figure 15a shows a view from above on a transport container 40 according to the invention according to the second embodiment. Figures 15b and 15c show a front view and a side view of the transport container 40 of Figure 15a, which likewise have slot shapes, such as those used in the first embodiment. Figure 15d shows a detail of the front view of Figure 15b on a larger scale, to better show the measurements of the sliding skids. Figure 16 shows a perspective view of a third more preferred embodiment of the stackable or insertable transport container 50 according to the invention. This conveyor container 50 has a bottom 2, which can be a continuous surface, which selectively can be provided by the underside with bridges to raise the stability of the bottom. Alternatively, the bottom 2 can also be perforated or have a cellular or grid-like structure. Background 2 is preferably rectangular, but may also have rounded or otherwise shaped corners. From the bottom 2 of the conveyor container 1 a front wall 3, a rear wall 4, a left side wall 5 and a right side wall 6 extend, so as to form a reception area. The bottom 2, the front wall 3, the rear wall 4, the left side wall 5 and the right side wall 6 are preferably made of synthetic material, but other materials can also be used. The front wall 3, the rear wall 4, the left side wall 5 and the right side wall 6 have a lower wall section 103, 104, 105 or 106 that essentially extends vertically upwards, as well as a wall section 203, 204 , 205 or 206 that extend essentially vertically upwards. As can be seen in Figure 16, the wall sections 103-105 extend internally, while the outer wall sections 203-206 continue to extend outwardly such that the horizontal transverse surface between the lower wall sections is less than the transverse surface between the upper wall sections. The lower and upper wall sections are connected to each other by means of a connecting section 207 that extends outwardly inclined, which extends outwardly from the upper edges of the lower wall sections and upwards to the ends. lower edges of the upper wall sections. Approximately at the height of the lower edge of the connecting section 207 on the outer side of the side wall or alternatively on the outer side of the front and / or rear wall a flange (303 and 306 in FIGS. 18 and 19) is provided. ) that extends horizontally. When two transport containers are in their internal state, then the lower surface of the flange 303, 306 of the upper conveyor container rests on the upper surface of the side walls of the conveyor container which is below, thereby raising the stability of the stacking and the loading of the sliding bridges of the upper transport container is reduced, which rest on the groove stops of the lower conveyor container. The transport container 50 shown in Figure 16 preferably has a total length of 60 cm and a total width of approximately 40 cm, wherein the lower wall sections 103-106 preferably have a height of approximately 8 cm and the upper wall sections 203 -206 preferably have a height of approximately 7 cm, such that the total height of the transport container amounts to approximately 15 cm. The slots 7a-7d and 8a-8d are formed in the upper wall sections 203-206 by through wall sections 207a-207d offset outward, as shown in cross-sectional view in Figure 19. A possible shape of the grooves 7a-7d is shown for example in Figure 19, wherein the grooves 8a-7d are formed identical on the side wall opposite. In this way, by means of this shaping of the grooves 7a-76d and 8a-8d on the outer side of the upper wall sections 205 and 206 several reinforcement ribs are formed, which contribute to the stability of the transport container 50. As can be seen in FIG. to be observed in figures 17a, 17b and 19, the sliding bridges 12a-ld and 13a-13d have different shapes. Both outer sliding bridges 12a, 12d, 13a and 13d have a drop shape while the internal sliding bridges 12b, 12c, 13b, 13c have an approximately semi-circular shape. At the outer end of all the sliding bridges an outward pointing protrusion is provided (for example 213a and 213b in Figures 17a and 17b), which serves to be engaged in a channel or with a ridge (406 in Figure 18) on the upper side of the upper wall sections of the side walls. However, these protuberances can also be coupled to the bearing surface of the slot stops (10a-10d in FIG. 19), when two conveyor containers are inserted into each other. By means of the drop shape (see sliding bridges 13a in Figure 17b) or the semicircular shape (see sliding bridges 13b in Figure 17a) the sliding bridges facilitates the placement of the sliding bridges in the slots. The sliding bridges 13a and 13 preferably have a spacing of approximately 13 cm. The sliding bridges 13b and 13c preferably have a gap of approximately 16 cm. The sliding bridges 13c and 13d preferably have a spacing of approximately 13 cm. The same separations are also applied naturally to the separations of the sliding bridges 12a-12d of the opposite side wall. The recesses 16a and 16b preferably have a spacing of approximately 13 cm. The recesses 16b and 16c preferably have a gap of approximately 16 cm. The recesses 16c and 16d preferably have a spacing of approximately 13 cm. The same separations are also applied naturally for the separations of the recesses 17a-17d of the opposite side wall. The holes 21a and 21b preferably have a gap of approximately 13 cm. The holes 12b and 12c preferably have a gap of approximately 15 cm. The holes 12c and 12d preferably have a spacing of approximately 10.5 cm. The same separations are also applied naturally to the gaps 22a-22d of the opposite side wall.
Figures 20a, 20b, 21a, 21b as well as 22a, 22b show especially preferred embodiments of the transport container according to the invention. In these modalities the insertion of an upper container in a container placed below is only possible in one direction. This avoids a "mixed" insertion of several stacked transport containers. In this way, the unstacking is carried out only in one direction, which has the advantage that the packing staff or the automatic packing machine should only work in one direction. This has the advantage that the stacking of the transport containers, which is directly in front of a wall or another stack of containers, should not move forward when a container stacked erroneously should be taken backwards (instead of forward). . It is obvious that this feature is very important is very important in the case of empty containers that are introduced into each other. As shown in Figures 20a and 20b, the transport container has on each side two sliding shoes 500 a-d and two slots 502 a-d. The spacings between the slot holes 503 a-d on each side are different from the separations of the corresponding slide bridges. It is obvious that to place an upper container in a container that is below, the insertion movement described above is also required. It is also clear that only one introduction is possible in one direction, so that a wrong insertion is not possible (this is in the opposite direction). In Figures 21a and 21b is a variation of the container of Figures 20a and 20b. In this container on each side three sliding bridges 600 a-f and three slots 602 a-f are formed. The spacings between the slot holes 603 a-f on each side of the container are different. Therefore, it is clear that in order to introduce an upper container into a container that is underneath, the described insertion movement is also required and because the insertion is possible only in one direction, in such a way that a wrong insertion (this is in wrong sense) is not possible. In Figures 21a and 21b it can be seen that the middle sliding bridges b, e are somewhat deeper than the outer sliding bridges 600 a, c, d, f. In Figures 22a and 22b another variation of the container of Figures 20a, b and 21a, b is shown. In these containers, four sliding bridges 700a-h and four slots 702 a-h are provided on each side. The spacings between the slot holes 703a-h on each side are different from the separations of the sliding bridges. In addition, the separations between the sliding bridges 700 a-h on each side of the container are all different. Therefore it is clear that to introduce a lower container into a container that is below the insertion movement described and only the insertion in one direction is possible, so that the wrong insertion is not possible (this is in the opposite direction). An insert in the opposite directions is not possible, since the separations of the sliding bridges are not symmetrically distributed (that is, the separations between both external sliding bridges are the same or different from the separations of both medium sliding bridges), but the three separations on each side are different from each other. In Figures 22a, 22b it can further be seen that the average sliding bridges 700 b, c, f, g are disposed slightly deeper than both outer sliding bridges 700a, d, e, h.
Another important aspect of the invention shown in FIGS. 20a, 20b to 22a, 22b is that a reinforcing rib VR is formed on each of the sliding bridges. The reinforcing rib VR can be formed either by means of a thickening of the material (the material in that position of the rib is thicker) or by means of a corresponding conformation of the material in the side walls in the positions of the reinforcing ribs . In each case, the stability of the sliding bridges is clearly increased, in such a way that the rupture of the sliding bridges is effectively avoided. In this way it is possible to dispense with a high-value synthetic material, which for example is reinforced with glass fibers. Instead of this a common synthetic material can be used. Since the complicated technical mixing of fiberglass particles in the synthetic material can be dispensed with, material and production costs can be clearly reduced. Still an important feature is the conformation of the sliding bridges G as well as the conformation of the guide groove FN. As shown schematically in FIG. 23, the guide groove FN of a content B according to the invention has an inclined lateral surface 800, which is shaped to engage a corresponding inclined surface 801 of a sliding rib 803 formed on the side bottom of the sliding bridge 802, of an upper container B. It is obvious that the side wall of the lower container B in the case of a greater application of force through the upper container, that is through the corresponding sliding bridge 802 can not be pushed outwards, which would result in the sliding bridges slipping off the upper edge of the side wall of the lower container. Instead of this the side wall by means of the coupling of the corresponding inclined surfaces 800 and 801 of the guide groove FN and the sliding ribs 803 are pushed inwards, thereby avoiding slippage also in the case of a high application of force through the upper container.