Grating Using Press Process and Method Thereof

Abstract

A grating ( 1 ) and a method of manufacturing the same using a pressing process are disclosed. The grating manufacturing method of the present invention includes the step of bending opposite ends of a metal plate to form a main surface ( 5 ) and supports ( 4 ), each having a predetermined height, the step of drawing a plurality of water drain slot formation portions of the main surface ( 5 ) to form slot frame parts ( 3 ), each having a predetermined depth, and the step of perforating bottoms of the slot frame parts ( 3 ) to form water drain slots ( 2 ). Therefore, the present invention provides a grating ( 1 ) that can sustain a relatively heavy load despite being manufactured through a simple pressing process, and a method of manufacturing the same through the pressing process.

1 . A method of manufacturing a grating using a pressing process, comprising the steps of:
 bending opposite ends of a metal plate to form a main surface and supports, each having a predetermined height;   drawing a plurality of water drain slot formation portions of the main surface to form slot frame parts, each having a predetermined depth; and   perforating bottoms of the slot frame parts to form water drain slots.   
   
   
       2 . The method of manufacturing the grating using the pressing process according to  claim 1 , wherein each of the heights of the supports and the depths of the slot frame parts is equal to a depth of a support seat of each of sewer walls of a sewer. 
   
   
       3 . The method of manufacturing the grating using the pressing process according to  claim 1 , wherein a length of each of the slot frame parts is greater than a width of the sewer and is less than a width of the support seats of the sewer walls. 
   
   
       4 . The method of manufacturing the grating using the pressing process according to  claim 1 , wherein a plurality of through holes is formed through a part defined between the adjacent water drain slots. 
   
   
       5 . The method of manufacturing the grating using the pressing process according to  claim 1 , wherein each of the supports is bent at an angle corresponding to a slope angle of the support seat of each of the sewer walls. 
   
   
       6 . The method of manufacturing the grating using the pressing process according to  claim 1 , further comprising the step of:
 mounting a subsidiary frame both to a lower end of each of the supports and to parts of lower surfaces of opposite ends of the slot frame parts.   
   
   
       7 . The method of manufacturing the grating using the pressing process according to  claim 1 , further comprising the step of:
 bending each of the supports such that a height thereof is greater than a depth of each of the slot frame parts, and bending the support several times at 90°, thus forming a multiply bent part, wherein   the opposite ends of the slot frame parts are in close contact with the related multiply bent part, so that the slot frame parts are supported by the multiply bent parts.   
   
   
       8 . A method of manufacturing a grating using a pressing process, comprising the steps of:
 bending opposite ends of a metal plate to form a main surface and supports, each having a predetermined height;   drawing a plurality of water drain slot formation portions of the main surface to form slot frame parts, each having a predetermined depth;   perforating bottoms of the slot frame parts to form water drain slots;   uniting front surface members to opposite ends of the supports; and   charging a filling material into a space defined by the main surface, the supports and the front surface members.   
   
   
       9 . The method of manufacturing the grating using the pressing process according to  claim 8 , further comprising the step of:
 mounting a subsidiary frame to each of opposite ends of a lower surface of the main surface turned upside down.   
   
   
       10 . A method of manufacturing a grating using a pressing process, comprising the steps of:
 drawing a plurality of water drain slot formation portions of a main surface of a metal plate to form slot frame parts, each having a predetermined length; and   perforating bottoms of the slot frame parts to form water drain slots.   
   
   
       11 . A method of manufacturing a grating using a pressing process, comprising the steps of:
 bending opposite ends of a metal plate to form a main surface and supports, each having a predetermined height;   drawing a plurality of first water drain slot formation portions of the main surface to form first slot frame parts, each having a predetermined depth;   drawing parts between lower ends of the first slot frame parts to form a plurality of second slot frame parts;   perforating bottoms of the second slot frame parts to form a plurality of water drain slots;   uniting front surface members to opposite ends of the supports; and   charging a filling material into a space defined by the main surface, the supports and the front surface members.   
   
   
       12 . A grating manufactured through the method according to  claim 1 .