with one another until the last plate like object 1 is placed in the position shown by a broken line in fig2 in a conventional container of this kind having no plate spring 6 therein only thirty pieces corresponding to fifteen channel boxes at most of plate like objects 1 can be held while in the above embodiment of the present invention which has the same dimensions as the conventional container thirty six corresponding to eighteen channel boxes plate like objects 1 can be held even if the elongated rod referred to in the statement under 34 description of the related art 34 is not used fig3 is a horizontal section of an embodiment of the present invention in which flat plate like objects not angle like objects are to be placed in tight contact with one another the construction and operation of this embodiment being similar to those of the first embodiment previously described in this embodiment the plate like objects 1 39 can be inserted in a tightly laminated state until the last plate like object 1 39 is placed in the position shown by a broken line in the same drawing in the above described embodiments two plate springs 6 are arranged in the widthwise direction of a container one plate spring may also be provided at the widthwise intermediate portion of the interior of the container or not less than two plate springs at horizontally symmetric portions of the interior thereof in the above described embodiments only one or only one horizontal row of plate springs are provided in the container the plate springs may also be provided at vertically spaced portions of the interior of the container the form of the springs may be modified in various manners the.