Blast treatment device and blast treatment method

1. A blast treatment device comprising:

at least one nozzle that injects blast media;

a movement structure that reciprocates the at least one nozzle along a track;

at least one weight member that cancels a vibration caused by reciprocating the at least one nozzle;

a sensor that detects a moving direction of the at least one nozzle; and

a weight control device that moves the at least one weight member, in a direction to cancel the vibration, according to the moving direction of the at least one nozzle.

2. A blast treatment device comprising:

at least one nozzle that injects blast media;

a movement structure that reciprocates the at least one nozzle along a track; and

at least one weight member that cancels a vibration caused by reciprocating the at least one nozzle, wherein

the movement structure has at least one rotating member that repeats a normal rotation and a reverse rotation with a rotating shaft as a fulcrum, one end side of the at least one rotating member being coupled to the at least one nozzle, and

the at least one weight member is disposed on another end side of the at least one rotating member.

3. The blast treatment device according to claim 2 ,

wherein a weight and a location of the at least one weight member are determined to make a rotational moment around the fulcrum by a gravity on a side of the at least one nozzle become not more than a rotational moment around the fulcrum by a gravity on a side of the at least one weight member.

4. The blast treatment device according to claim 2 ,

wherein a weight and a location of the at least one weight member are determined to make a rotational moment around the fulcrum by a gravity become zero.

5. The blast treatment device according to claim 2 ,

wherein the movement structure further has:

a motor having an output shaft, the output shaft and the rotating shaft lie on different straight lines; and

a power transmission structure that couples the output shaft to the rotating shaft, the power transmission structure being configured to transmit a rotative power in one direction from the output shaft to the rotating shaft as a power for repeating the normal rotation and the reverse rotation of the at least one rotating member.

6. The blast treatment device according to claim 5 , further comprising:

a dust-proof body that prevents scattering of the blast media by covering at least the at least one nozzle,

wherein at least the motor and the power transmission structure are disposed outside the dust-proof body.

7. The blast treatment device according to claim 5 ,

wherein the power transmission structure has:

a rotating plate fixed to the output shaft of the motor; and

a connecting bar rotatably coupled to each of the at least one rotating member and a portion other than a rotation center of the rotating plate,

wherein a weight of the rotating plate on a side opposite to a coupling position of the connecting bar with respect to the rotation center is adjusted to suppress a vibration caused by a rotation of the rotating plate.

8. A blast treatment device comprising:

at least one nozzle that injects blast media;

a movement structure that reciprocates the at least one nozzle along a track; and

at least one weight member that cancels a vibration caused by reciprocating the at least one nozzle, wherein

the at least one nozzle comprises multiple nozzles,

the at least one weight member comprises multiple weight members and

the movement structure has:

at least one bar-shaped member that fixes the nozzles; and

rotating members that each repeat a normal rotation and a reverse rotation with a corresponding rotating shaft as a fulcrum, one end side of each of the rotating members being coupled to the at least one bar-shaped member, and

the multiple weight members are attached to other end sides of the rotating members respectively.

9. The blast treatment device according to claim 8 , further comprising:

a connecting member that couples the weight members with each other directly or indirectly in the other end sides of the rotating members.

10. The blast treatment device according to claim 9 ,

wherein the at least one bar-shaped member, the rotating members and the connecting member form a link mechanism.

11. A blast treatment method comprising:

utilizing the blast treatment device according to claim 1 to:

inject blast media from at least one nozzle;

reciprocate the at least one nozzle along a track; and

cancel a vibration, caused by reciprocating the at least one nozzle, by at least one weight member.

12. A blast treatment method comprising:

utilizing the blast treatment device according to claim 2 to:

inject blast media from at least one nozzle;

reciprocate the at least one nozzle along a track; and

cancel a vibration, caused by reciprocating the at least one nozzle, by at least one weight member.

13. A blast treatment method comprising:

utilizing the blast treatment device according to claim 8 to:

inject blast media from at least one nozzle;

reciprocate the at least one nozzle along a track; and

cancel a vibration, caused by reciprocating the at least one nozzle, by at least one weight member.