Fuel tank

Abstract

A fuel tank includes an inner surface, an engaged portion protruding from the inner surface, an in-tank component part including an accommodation for accommodating the engaged portion, and an engaging portion engaging with the engaged portion and placed in the accommodation of the in-tank component part. The fuel tank can inhibit the fastening force acting between itself and the in-tank component part from degrading.

1 . A fuel tank, comprising: 
 an inner surface,    an engaged portion protruding from the inner surface;    an in-tank component part comprising an accommodation for accommodating the engaged portion; and    an engaging portion engaging with the engaged portion, and placed in the accommodation of the in-tank component part.    
   
   
       2 . The fuel tank set forth in  claim 1 , wherein: 
 both of the engaged portion and the engaging portion deform elastically to engage the engaging portion with the engaged portion; and    the in-tank component part is installed to the fuel tank with the engaged portion accommodated in the accommodation.    
   
   
       3 . The fuel tank set forth in  claim 1 , wherein: 
 the engaged portion comprises an engaged rib through which an engaged hole is bored; and    the engaging portion comprises an engaging claw engaging with the engaged hole.    
   
   
       4 . The fuel tank set forth in  claim 1 , wherein the accommodation of the in-tank component part comprises a thinned portion for making it easier to accommodate the engaged portion therein.  
   
   
       5 . The fuel tank set forth in  claim 1  further comprising an insertion tab fitted into the accommodation of the in-tank component part, wherein: 
 the insertion tab is fitted temporarily into the accommodation with an accommodation allowance for the engaged portion left to the accommodation in a first step;    the engaging portion engages with the engaged portion, and the in-tank component part is installed temporarily to the fuel tank with the engaged portion accommodated in the accommodation in a second step; and    the temporarily fitted insertion tab is further fitted fully into the accommodation, and a surplus allowance in the accommodation, the surplus allowance resulting from the accommodation allowance, disappears to fully install the in-tank component part to the fuel tank in a third step.    
   
   
       6 . The fuel tank set forth in  claim 1 , wherein the engaged portion is disposed on an inner peripheral side with respect to the engaging portion.  
   
   
       7 . The fuel tank set forth in  claim 1 , wherein the engaging portion is composed of a material whose fuel-swelling property is less than that of a material composing the engaged portion.  
   
   
       8 . The fuel tank set forth in  claim 1 , wherein the engaged portion is formed as a rectangular plate shape, and the accommodation is formed as a “U”-shaped cross section.  
   
   
       9 . The fuel tank set forth in  claim 1 , wherein the accommodation further comprises paired rotation-stopper ribs.  
   
   
       10 . The fuel tank set forth in  claim 1  comprising a plurality of pairs of the engaged portion and the engaging portion engaging with engaged portion, the pairs disposed at angular intervals in an arc-shaped disposition; and 
 one of the pairs has a width larger than that of the other pairs.    
   
   
       11 . A fuel tank, comprising: 
 an inner surface;    an engaged portion protruding from the inner surface;    an in-tank component part; and    an engaging portion disposed in the in-tank component part, and engaging inward with an outer periphery of the engaged portion from an outer peripheral side to an inner peripheral side, wherein:    both of the engaged portion and the engaging portion deform elastically to engage the engaging portion with the engaged portion, thereby installing the in-tank component part to the fuel tank.    
   
   
       12 . The fuel tank set forth in  claim 11 , wherein: 
 the engaged portion comprises an engaged rib through which an engaged hole is bored; and    the engaging portion comprises an engaging claw engaging with the engaged hole.    
   
   
       13 . The fuel tank set forth in  claim 11 , wherein the engaged portion is disposed on an inner peripheral side with respect to the engaging portion.  
   
   
       14 . The fuel tank set forth in  claim 11 , wherein the engaging portion is composed of a material whose fuel-swelling property is less than that of a material composing the engaged portion.  
   
   
       15 . The fuel tank set forth in  claim 11  comprising a plurality of pairs of the engaged portion and the engaging portion engaging with engaged portion, the pairs disposed at angular intervals in an arc-shaped disposition; and 
 one of the pairs has a width larger than that of the other pairs.