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US 2009/0260209 A1Published application
Screwing apparatus and method of controlling screwing operation
AssigneeFujitsu Limited
InventorsHajime Ishibashi, Satoru Osada
Life of this patent
Estimating the term…
Abstract
A screwing apparatus includes a support member having a horizontal support surface. A single urging member has an urging surface opposed to the support surface. The urging surface is set parallel to the support surface. A driving mechanism is configured to drive at least one of the support member and the urging member to move to change the distance between the support member and the urging member. Driver bits have the tip ends opposed to the support surface, respectively. The driver bits are driven to move toward and away from the urging surface.
Claims14
A screwing apparatus comprising:
- a support member having a horizontal support surface;
- a single urging member having an urging surface opposed to the support surface, the urging surface being parallel to the support surface;
- a driving mechanism configured to drive at least one of the support member and the urging member to move to change a distance between the support member and the urging member;
- and
- driver bits having tip ends opposed to the support surface, respectively, the driver bits each driven to move toward and away from the urging surface.
2 more elements
A screwing apparatus comprising:
- a support member having a horizontal support surface;
- driver bits each having a tip end opposed to the support surface, the driver bits each driven to move toward and away from the support surface;
- driving sources assigned to the driver bits, respectively, the driving sources each driving corresponding one of the driver bits to rotate around an axis of the corresponding one of the driver bits;
- level detector circuits assigned to the driver bits, respectively, the level detector circuits each detecting a movement distance of corresponding one of the driver bits in an axial direction of the corresponding one of the driver bits;
- and
- a controller circuit configured to identify a detection of the movement distance smaller than a specific value, the controller circuit configured to supply a control signal for reverse rotation to any of the driving sources, the any of the driving sources being assigned to any of the driver bits that is related to the movement distance smaller than the specific value.
3 more elements
A method of controlling a screwing operation, comprising:
- supplying control signals to driving sources, respectively, the driving sources each associated with individual one of driver bits, the control signals each configured to drive corresponding one of the driver bits for rotation by a predetermined torque around an axis of the corresponding one of the driver bits;
- monitoring a movement distance of each of the driver bits;
- and
- identifying a detection of the movement distance smaller than a specific value, for supplying a control signal for reverse rotation to any of the driving sources assigned to any of the driver bits that is related to the movement distance smaller than the specific value.
1 more element
A computer-readable storage medium containing program instructions controlling a processor to control a screwing operation, by:
- supplying control signals to driving sources, respectively, the driving sources each associated with individual one of driver bits, the control signals each configured to drive corresponding one of the driver bits for rotation by a predetermined torque around an axis of the corresponding one of the driver bits;
- monitoring a movement distance of each of the driver bits;
- and
- identifying a detection of the movement distance smaller than a specific value, for supplying a control signal for reverse rotation to any of the driving sources assigned to any of the driver bits that is related to the movement distance smaller than the specific value.
1 more element
A screwing apparatus comprising:
- a support member having a horizontal support surface;
- driver bits each having a tip end opposed to the support surface, the driver bits each driven to move toward and away from the support surface;
- driving sources assigned to the drive bits, respectively, the driving sources each driving corresponding one of the driver bits to rotate around an axis of the corresponding one of the driver bits;
- torque sensors assigned to the driver bits, respectively, the torque sensors each detecting torque on corresponding one of the driver bits;
- and
- a controller circuit configured to identify a detection of the torque larger than a specific value, the controller circuit configured to supply a control signal for reverse rotation to any of the driving sources, the any of the driving sources being assigned to any of the driver bits that is related to the torque larger than the specific value.
3 more elements
A method of controlling a screwing operation, comprising:
- supplying control signals to driving sources, respectively, the driving sources each associated with individual one of driver bits, the control signals each configured to drive corresponding one of the driver bits for rotation by a predetermined torque around an axis of the corresponding one of the driver bits;
- monitoring torque on each of the driver bits based on a torque sensor;
- and
- identifying a detection of the torque larger than a specific value, for supplying a control signal for reverse rotation to any of the driving sources, the any of the driving sources being assigned to any of the driver bits that is related to the torque larger than the specific value.
1 more element
A computer-readable storage medium containing program instructions controlling a processor to control a screwing operation, by:
- supplying control signals to driving sources, respectively, the driving sources each associated with individual one of driver bits, the control signals each configured to drive corresponding one of the driver bits for rotation by a predetermined torque around an axis of the corresponding one of the driver bits;
- monitoring torque on each of the driver bits based on a torque sensor;
- and
- identifying a detection of the torque larger than a specific value, for supplying a control signal for reverse rotation to any of the driving sources, the any of the driving sources being assigned to any of the driver bits that is related to the torque larger than the specific value.
1 more element
Dependencies are inferred from the claim text.