Tray

Abstract

A tray having excellent impact resistance and excellent vibration resistance and capable of stably holding a fixed number of stored objects. A tray ( 1 ) for storing objects having a substantially plate shape is configured such that angle threads ( 10 ) and bottom surfaces ( 20 ) are alternately arranged, the angle threads ( 10 ) include mount surfaces ( 12 ) that are inclined at a given angle with respect to the bottom surfaces ( 20 ) and on which the stored objects are mounted, and the bottom surfaces 20 include convex portions ( 22 ) arranged asymmetrically with respect to a perpendicular line bisecting the length of the angle threads.

1 . A tray for storing objects having a substantially plate shape, the tray comprising:
 angle threads;   bottom surfaces, the angle threads and the bottom surfaces being alternately arranged; and   mount surfaces on which the stored objects are mounted, the mount surfaces being provided to the angle threads and inclined at a given angle with respect to the bottom surfaces.   
     
     
         2 . The tray according to  claim 1 , wherein the bottom surfaces comprise convex portions defined by projecting portions of the bottom surfaces. 
     
     
         3 . The tray according to  claim 2 , wherein the convex portions are arranged asymmetrically with respect to a perpendicular line bisecting a length of the angle threads. 
     
     
         4 . The tray according to  claim 3 , wherein the convex portions have a height such that when another tray is stacked on the tray so as to be oriented in a direction 180 degrees opposite to the tray, a distance between an opposite surface to a mount surface of the other tray and the mount surface of the tray is substantially equal to a thickness of the stored object. 
     
     
         5 . The tray according to  claim 1 , further comprising side walls that surround the angle threads and the bottom surfaces. 
     
     
         6 . The tray according to  claim 5 , wherein the side walls comprise leveled portions defined by recessed portions of the side walls. 
     
     
         7 . The tray according to  claim 6 , wherein the leveled portions are arranged asymmetrically with respect to at least one of a perpendicular line bisecting a length of the tray and a perpendicular line bisecting a width of the tray. 
     
     
         8 . The tray according to  claim 7 , wherein the leveled portions have a height such that when the other tray is stacked on the tray so as to be oriented in the direction 180 degrees opposite to the tray, a distance between the opposite surface to the mount surface of the other tray and the mount surface of the tray is substantially equal to the thickness of the stored objects. 
     
     
         9 . The tray according to  claim 1 , further comprising orientation discriminating portions that are arranged asymmetrically with respect to at least one of the perpendicular line bisecting the length of the tray and the perpendicular line bisecting the width of the tray. 
     
     
         10 . The tray according to  claim 5 , further comprising a strengthening rib at an outer periphery of the side walls. 
     
     
         11 . The tray according to  claim 1 , wherein the tray is made from a foamed resin. 
     
     
         12 . The tray according to  claim 11 , wherein the foamed resin comprises foamed polyethylene terephthalate.