Shot processing apparatus

Abstract

Provided is a shot processing apparatus capable of suppressing scattering of projection materials to the outside without causing any deterioration in projection efficiency. The shot processing apparatus comprises: a cabinet; a drum housed in the cabinet and having an opening allowing loading of a workpiece therethrough, wherein the drum is configured to be selectively disposed in one of a workpiece-loading position, a workpiece-processing position and a workpiece-unloading position; a projector for projecting the projection materials into the drum; and a door for selectively opening and closing the opening of the drum, the door being formed with a projection port for the projection materials, the projector being attached to the door so as to project the projection materials from the projection port; wherein the door is configured such that the projection port is disposed just above the opening of the drum when opening the opening of the drum.

1 . A shot processing apparatus for abrasively cleaning a workpiece by projection materials, comprising:
 a cabinet;   a drum housed in the cabinet and formed in a bottomed hollow cylindrical shape having an opening allowing loading of the workpiece therethrough, the drum being configured to be selectively disposed in one of a workpiece-loading position for allowing the workpiece to be loaded into the drum, a workpiece-processing position for allowing the workpiece to be abrasively cleaned by the projection materials, and a workpiece-unloading position for allowing the workpiece to be unloaded from the drum;   a projector for projecting the projection materials into the drum; and   a door for selectively opening and closing the opening of the drum, the door being formed with a projection port for the projection materials, the projector being attached to the door so as to project the projection materials from the projection port;   wherein the door is configured such that the projection port is disposed above the opening of the drum when opening the opening of the drum.   
     
     
         2 . The shot processing apparatus according to  claim 1 , wherein the door is attached to the cabinet through a link arm, the link arm having one end pivotally attached to the door and the other end pivotally attached to the cabinet, and wherein the other end of the link arm is located above the one end, in each of a state in which the door opens the opening of the drum and a state in which the door closes the opening of the drum. 
     
     
         3 . The shot processing apparatus according to  claim 1 , wherein the shot processing apparatus further comprises a projection material receiver provided on the cabinet at a position below a lower end of the door, the projection material receiver being provided in conformity to a range of horizontal movement of the lower end of the door during opening/closing of the door. 
     
     
         4 . The shot processing apparatus according to  claim 3 , wherein the cabinet is formed with a communication passage providing communication between an inside of the cabinet and a space located adjacent to and above the projection material receiver. 
     
     
         5 . The shot processing apparatus according to  claim 1 , wherein the drum has an outer peripheral wall provided with a plurality of through-holes, and wherein the shot processing apparatus further comprises a shielding member provided to cover the plurality of through-holes from outside the drum, the shielding member having a double structure comprising a first shielding portion formed with a plurality of first communicating holes, and a second shielding portion formed with a plurality of second communicating holes at positions which do not overlap the first communicating holes of the first shielding portion. 
     
     
         6 . The shot processing apparatus according to  claim 1 , wherein the drum has an outer peripheral wall and a bottom wall, wherein the shot processing apparatus further comprises a drum casing provided outside the drum to integrally cover the outer peripheral wall and the bottom wall. 
     
     
         7 . The shot processing apparatus according to  claim 5 , which further comprises a drum casing provided outside the shielding member to cover the drum and the shielding member. 
     
     
         8 . The shot processing apparatus according to  claim 6 , wherein a lower portion of the drum casing is formed with a projection material discharging port for discharging the projection materials within the drum casing, to an outside of the drum casing, when the drum is in the workpiece-processing position. 
     
     
         9 . The shot processing apparatus according to  claim 1 , wherein the door is formed with an air-intake opening communicating with an outer side of the door, and provided with a protector on the side of the drum with respect to the air-intake opening, the protector being configured to suppress leakage of the projection materials through the air-intake opening toward the outer side of the door. 
     
     
         10 . The shot processing apparatus according to  claim 1 , which the shot processing apparatus further comprises: a projection material tank storing therein the projection materials, the projection material tank being provided above the projector; an introduction pipe attached to the projection material tank to feed the projection materials downwardly; and an introduction tube provided below the introduction pipe, and formed with a projection material inlet opened upwardly at a position corresponding to the introduction pipe, the projection material inlet being set to a size capable of receiving the projection materials fed from the introduction pipe, even when the introduction tube is moved during opening/closing of the door. 
     
     
         11 . The shot processing apparatus according to  claim 10 , wherein the introduction tube is configured to be moved in conjunction with the opening/closing of the door, and the introduction pipe is movable, following the movement of the introduction tube. 
     
     
         12 . The shot processing apparatus according to  claim 11 , wherein the introduction pipe is formed with a joint which is bendable, following the introduction tube.