fig1 - 4 show a first embodiment according to the invention , which comprises a first suitcase component 1 and a second suitcase component 2 . each of the suitcase components 1 and 2 has a generally oblong rectangular prism like configuration and the corner portions and edge portions of which are rounded suitably ( not shown in the drawings ). in fig1 and 2 , the suitcase components 1 and 2 are connected in side - by - side relationship . the suitcase components 1 and 2 have respectively handle portions 3 and 4 of conventional type , connectors 5 and 6 which will be explained hereinafter in detail with reference to fig5 - 8 , and connectors 8 and 9 of the construction similar to that of the connectors 5 and 6 respectively . the connectors 8 and projection members as shown in fig5 and 6 and act as temporary legs or pedestals when the suitcase component 2 is carried separating form and independently of the suitcase component 1 and , during the condition of fig1 the connectors 8 or the temporal legs are spaced from the surface of the floor by a small distance . further , casters 7 are provided on the first suitcase component 1 . preferably , preparatory handles 13 and 12 are provided on the first and second suitcase components 1 and 2 respectively on respective sides different from those having the handles 3 and 4 respectively . the preparatory handles enable to carry respective suitcase components at different attitudes , but it will be understood that such handles 13 and 12 may be omitted . shown at 10 and 11 are connectors of such as conventional latch type which assures the connected conditions . the connectors 10 and 11 may be omitted since the connected conditions shown in fig1 through 4 can reliably be maintained by the engagement of the connectors or the projection members 8 or 5 with the connectors or the recess members 9 or 6 during usual pushing or pulling operation . further , the connectors 10 and 11 may be substituted by belt and the like . although not shown in the drawings there are provided suitably pulling cord on the suitcase component 2 for aiding the pulling operation . each of the suitcase components 1 and 2 has usual construction consisting of a main body portion , a lid portion connected to the main body portion through hinge means , and latch means having a lock ( these elements are not shown in the drawings ); and is formed of suitable rigid and light weight material such as synthetic resin , light metal such as aluminium alloy , fabric and the like . the width shown in fig3 is about 23 cm , and it will be understood that the height 100 cm consists of the height 49 cm of the main body of the suitcase component 2 plus height 45 cm of the main body of the suitcase component 1 plus 6 cm of the caster 7 . when the suitcase assembly takes the form of fig3 and 4 , it is very easy to push or pull the assembly . further , the assembly does not occupy much space as compared with conventional suitcase , and it is possible to lean onto the suitcase assembly since the overall height is higher than that of conventional suitcase . fig5 through fig8 show connecting means according to a preferred embodiment , in which fig5 and 6 show a projection member 5 and fig7 and 8 show a recess member 6 . preferably , the projection member 5 and the recess member 6 are formed of steel , aluminium alloy , synthetic resin material or the like . further , either one of the projection member and the recess member may be formed of a material having permanent magnet property and the other member of magnetic material such that both members are maintained in engaging condition by magnetic force . the magnetic force may be afforded by electromagnet . as shown in fig5 through fig8 the recess member 6 has opposing two flat side surface portions 6b and 6b and opposing two inclined side surface portions 6c and 6c , and , corresponding two flat surface portions 5b and 5b and opposing two inclined surface portions 5c and 5c are formed on the projection member 5 , whereby relative movement between the suitcase components 1 and 2 is restricted by the engagement of the flat side surface portions 5b , 5b and 6b , 6b of the projection member 5 and the recess member 6 . the flat surface portions of the projection member 8 and the recess member 9 corresponding respectively the flat surface portions 5b , 5b and 6b , 6b are located such that each flat surface is perpendicular to or to left and right directions in fig4 for pushing or pulling the suitcase assembly . preferably , four projection members 5 or 8 are provided on one side surface of either one of the suitcase components 1 and 2 and four recess members 6 or 9 are provided on the other suitcase component with the flat surface portions being arranged in the same direction with respect to diagonally arranged two projection members and two recess members , and in the direction perpendicular to the above mentioned two projection members and two recess members flat surface portions being arranged on the two projection members and two recess members on the other diagonal line . such arrangement can effectively prevent the relative movement between the components 1 and 2 reliably . it will be understood that the flat surface portions may not necessarily be parallel to each other , and the function preventing the relative movement is due to the relatively large contacting area between the flat surfaces . according to the invention , it is possible to reduce the size of each suitcase component while maintaining the total content compatible to large size suitcases . when the suitcase components are vertically overlapingly connected , the height may be larger than that of conventional large size suitcase , but it is easy to push or pull along a flat floor or a load and , as compared with conventional suitcase the overall height is higher , thus , it is easy to lean on the assembly , and on an inclined surface , stairs or the like , the assembly can easily be disassembled into respective suitcase components which are easy be carried by respective hands . further , when the suitcase components are connected in side - by - side relation , the assembly can be utilized as a temporal chair and the size thereof is too bulky to carry it , thereby it is effective to prevent burglar . by providing corresponding projection members and recess members on respective suitcase components , it is possible to reliably maintain the assembled condition and to disassemble or to separate into respective suitcase components as desired . it will be under stood that the present invention is not limited by the embodiment and that various changes and modifications can easily by made for those skilled in the art without departing from the gist of the present invention . for example , the projection member and the recess member shown in the embodiment may be changed as desired provided that both members can easily be connected and disconnected as desired . for example , the connecting means may include electrically actuated projection and recess means such as electro - magnet or the like . the size or dimensions and the configuration of the suitcase component and of constituting members may be determined as desired .
a suitcase assembly consisting of at least two suitcase components each of which having a generally rectangular configuration . projections and / or recesses are provided on each of the suitcase components for detachably connecting the suitcase components in vertically overlapping relationship and also in side - by - side relationship . the projections and / or recesses for connecting the suitcase components have opposing flat surface portions and opposing unclaimed surface portions .