Abstract:
This containment structure comprises a sheet-like container defining a plurality of cells for accommodation therein of small plants, in particular for cultivations in greenhouses, and a container holder having a substantially box-like shape. The containment holder removably supports the container and has engagement members allowing easy and reliable stacking of a plurality of such structures, cross-pieces for setting the position of the container with respect to the holder and recesses in the lateral walls for aerating the small plants accommodated in the cells.

Description:
This is a continuation of 06/895023 filed 08/08/86 now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     This invention relates to a container assembly, particularly for small horticultural-floral plants. 
     Nowadays to plant small plants in greenhouses small pots or containers having a plurality of cells are generally employed. 
     Such known types have some drawbacks, including poor practical transportability of same, with consequent increased expense also for their location and dislocation inside the greenhouse. 
     SUMMARY OF THE INVENTION 
     It is the main aim of this invention to eliminate the above indicated drawbacks affecting known types, by devising a container assembly which affords optimum planting for small plants cultivated in greenhouses and at the same time their easy transportation to and from the greenhouses. 
     Within the above-outlined aim it is a further important object to provide a container assembly which enables its stacking in a rapid way, even for prolonged time periods and with the plants accommodated therein, without in any way damaging the small plants. 
     The aim and objects set forth above are achieved by a containment structure, particularly for small horticultural-floral plants, according to the appended claims. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The features and advantages of the invention will be more clearly apparent from the detailed description of an embodiment thereof shown by way of illustration in the accompanying drawing sheets in which: 
     FIG. 1 shows a three-quarter perspective view of the container assembly; 
     FIG. 2 shows a three-quarter perspective view of the container; 
     FIG. 3 is a similar view of the container holder; 
     FIG. 4 is a partial perspective view of two stacked container assemblies; and 
     FIG. 5 is a partial side view of two stacked container assemblies, wherein a portion of the upper assembly has been broken away, for illustrating the engagement between the two assemblies. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference to the drawing figures, the containment structure 1 comprises a container tray 2 consisting of a sheet-like planar body 3 formed preferably from vacuum molded polystyrene. The container 2 has a plurality of cells 4, aligned to one another, defined by essentially frusto-concial containment bodies 30 and formed by hollow projections downwardly protruding from the planar body 3, such cells defining an upper opening 5 at the surface 6 of the sheet and a lower hole 7 for letting out the excess water at the smaller base 8 of body 30, depending from the surface 6. The number of the cells may vary in a broad range, in particular the container 2 may comprise 336 or 312 cells 4. The container assembly 1 also comprises a frame structure or container holder 9, having an open box-like structure, preferably of a shock-resistant plastic material and including two transverse sides 11 and two longitudinal sides 12 respectively defined by lateral walls 18 and 22. The top surface of the edges of side walls 18, 22 lie approximately in the same plane and define an upper open major surface. The bottom lowermost edges of side walls 18, 22 also lie approximately in the same plane and define a bottom open major surface. As visible from the drawings, the walls 18, 22 have inwardly bent edges 24, while the container holder 9 further comprises at the four corners thereof engagement means 10 projecting upwardly of the peripheral transverse sides 11. 
     Such means 10, having a width many times smaller than the length of the sides 11, are equal to each other and specular with respect to the longitudinal mid-axis of the container holder 9. 
     Such means 10 consist of a protruding male member projecting from the upper major surface of the holder 9 and an accommodation seat facing the lower major surface and vertically aligned to the male member, the male members and the accomodation seats being adapted to mutually engage upon two container assemblies 1 being stacked one upon the other. In particular the protruding member comprises a first elevation 13 of essentially parallelepipedal shape with trapezoidal longitudinal cross-section, and a second elevation 14 protruding from the latter, with a similar shape and slightly smaller dimensions. 
     Both elevations preferably have a hollow inside, accommodating an abutment element 15 rigid with the elevations and so arranged to rest on the flat top surface 16 of the second elevation 14 of a lower container holder 9, when two such holders are stacked. Preferably the abutment elements 15 comprise each a small rib rigid with the inside surface 17 of the walls 18 of the transverse sides 11. 
     Under the elevations 13, 14 and in parallel to the walls 18 of the transverse sides 11 there are present two lugs 19 having the same length and defining with walls 18 the accommodation seats, the ends of said lugs 19 and the portions of the walls 18 underlying the engagement means 10 resting, once two structures 1 are stacked, at the peripheral edges of the first elevation 13 of the lower structure 1 (see FIG. 5). 
     At each wall 18 there is formed an opening or recess formation 20 adapted to permit aeration of the small plants once two structures are stacked, similar openings or recess formations 21 being formed at the longitudinal side walls 22 of the container holder 9. As visible, the recess formations extend at intermediate portions of the lateral walls at a position facing the bottom surface of the holder 9, the recess formations laterally delimiting between each four feet portions which thus extend at the holder corners. As further clearly visible from FIG. 4, the height of the projections is smaller than the height of the lateral walls even at the portions thereof provided with the recess formations or openings 20, 21 so that even in the stacked condition, between the bases 8 of the bodies 30 and the bottom major surface of the holder 9 and to the sheet-like planar body of the underlying container assembly an interspace is formed which allows aeration of the small plants tilled in the lower container assembly. 
     The conformation of the sheet-like body 3 is essentially rectangular, the latter having a peripheral edge for resting on the lateral walls of the holder structure and, at the four corners, recesses 23 conforming with the elevation 13. 
     Support elements 25 further extend between the two opposed edges 24 of the longitudinal side walls 22, such elements also having the function of holding the containers 2 in a set position with respect to the related holders 9. In particular the support elements 25 comprise crosspieces arranged at such locations as to extend between two adjacent rows of cells of the related container 2. 
     The utilization of the containment structure 1 envisages the planting of the small plants into the cells 4; subsequently or prior to that operation the container 2 may be placed onto the container holder 9, the peripheral edges 26 of the sheet 3 resting on the sides 11 and 12 of the container holder 9. 
     The position of the container 2 with respect to the latter is determined by the elements 25 which secure the container 2 engaging themselves between two adjacent rows of cells. 
     Thus, the container assembly may be easily transported even if stacked onto other like container assemblies, by virtue of the engagement of the protruding elevation 14 between the ends of the transverse walls 18 and the lugs 19. The abutment element 15 imparts to the stack of container assemblies a high degree of stability, since the length of the abutment element is selected so as to allow accommodation of the second elevation 14 between the wall 18 and the lugs 19 and resting of the lower end of the element 15 on the top surface 16. 
     Preferably the diameters of the upper and lower bases of the cells 4 are 19.5 mm and 12.5 mm respectively, their height 25.5 mm. The hole 7 has a diameter of 6 mm. 
     Therefore, as explained, the container assembly 1 allows accommodation of a considerable number of small plants, may be transported in a rapid, easy and reliable manner thus speeding up the loading and unloading operations for their location in the greenhouses and rationalizing the loading and unloading operations onto and from motor vehicles. 
     The presence of the openings 20 and 21 further enables, in the instance of several container assemblies being stacked, the small plants contained therein to be aerated in an optimum manner without jeopardizing their growth. 
     Of course, the materials used and the dimensions may be any contingent ones, according to the requirements.