Drain trap

Abstract

Provided is a drain trap that allows easy maintenance, yet has high durability with ability to prevent condensation. The drain trap includes a bottomed cylindrical main body portion 5 having a lateral wall 51 on which a receiving pipe portion 2 for receiving liquid and a discharge pipe portion 3 for discharging the liquid are formed, an attachable/detachable partitioning body 1 for partitioning an inside space 4 of the main body portion 5 into a reservoir space 7 and a discharge space 8, a lid portion 6 for closing the inside space 4 of the main body portion 5 and a sealing case 9 surrounding, under a sealed state, at least a portion of an outer surface of the main body portion 5 in which the reservoir space 7 is formed. An air gap 91 is formed between the sealing case 9 and the main body portion 5. The sealing case 9 and the main body portion 5 are formed transparent. The lid portion 6 is attachable/detachable when the sealing case 9 is attached to the main body portion 5.

1 . A drain trap comprising:
 a cylindrical main body portion having a lateral wall on which a receiving pipe portion receiving liquid and a discharge pipe portion discharging the liquid are formed;   an attachable/detachable partitioning body partitioning an inside space of the main body portion into a reservoir space communicated to the receiving pipe portion and reserving liquid therein and a discharge space communicated to the discharge pipe portion and discharging the liquid;   a lid portion closing the inside space of the main body portion; and   a sealing case surrounding, under a sealed state, at least a portion of an outer surface of the main body portion in which the reservoir space is formed;   an air gap being formed between the sealing case and the main body portion;   the sealing case and the main body portion being formed transparent; and   the lid portion being attachable/detachable when the sealing case is attached to the main body portion.   
     
     
         2 . The drain trap of  claim 1 , wherein a connecting portion between the lateral wall and the receiving pipe portion and a connecting portion between the lateral wall and the discharge pipe portion are covered by the sealing case, with air gaps being formed relative to the sealing case. 
     
     
         3 . The drain trap of  claim 1 , wherein the sealing case is constituted of a plurality of split bodies split from each other. 
     
     
         4 . The drain trap of  claim 2 , wherein the sealing case is constituted of a plurality of split bodies split from each other.