# US 2019/0168366 A1 · Driver > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168366 A1 - Document ID: US20190168366A1 - Status: Published application - Kind: A1 - Application number: 16/320,972 - Filed: 2017-06-30 - Published: 2019-06-06 - Earliest claimed: 2016-07-29 - Assignees: Koki Holdings Co., Ltd. - Applicants: Koki Holdings Co., Ltd. - Inventors: Toshinori YASUTOMI; Shinichirou SATOU; Kazuhiko FUNABASHI; Yuki MITOMA - Web page: https://patentgrep.com/patent/US20190168366A1 ## CPC - B25C 1/047: {Mechanical details} - B25C 1/008: {Safety devices} - B25C 1/04: operated by fluid pressure {, e.g. by air pressure} - B25C 1/06: operated by electric power - B25C: HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS (for shoemaking A43D) ## Abstract To provide a driver that can be reduced in the amount of gas to be injected into a pressure chamber. The driver has: an impactor configured to hit a stopper by moving from a first position toward a second position; a pressure chamber to be filled with gas for moving the impactor from the first position toward the second position; a control mechanism configured to move the impactor from the second position toward the first position; and a gas injection portion configured to inject gas into the pressure chamber, wherein the impactor is capable of taking a standby position between the second position and the first position, and the control mechanism is configured to stop the impactor at an adjustment position closer to the second position than the standby position before gas is injected into the pressure chamber. ## Claims ### Claim 1 A driver comprising: an impactor configured to hit a stopper by moving from a first position toward a second position; a pressure chamber to be filled with gas for moving the impactor from the first position toward the second position; a control mechanism configured to move the impactor from the second position toward the first position; a gas injection portion configured to inject gas into the pressure chamber; and a first operating portion that is operated by an operator, wherein the impactor is capable of taking a standby position between the second position and the first position, and the control mechanism is configured to stop the impactor at an adjustment position closer to the second position than the standby position, when the first operating portion is operated, before gas is injected into the pressure chamber. ### Claim 2 (depends on 1) The driver according to claim 1, wherein the control mechanism comprises: an electric motor; and a power transmission route for moving the impactor from the second position to the first position by transmitting power of the electric motor to the impactor, wherein the control mechanism configured to perform: a first control connecting the power transmission path, moving the impactor from the second position toward the first position by the power of the electric motor, and stopping the impactor at the standby position, and a second control blocking the power transmission path, and stopping the impactor at the adjustment position when gas is injected into the pressure chamber. ### Claim 3 (depends on 1) The driver according to claim 1, wherein the control mechanism comprises: an electric motor and a power transmission route for moving the impactor from the second position to the first position by transmitting power of the electric motor to the impactor, wherein the control mechanism is configured to perform: a first control connecting the power transmission path, moving the impactor from the second position toward the first position by the power of the electric motor, and stopping the impactor at the standby position, and a third control connecting the power transmission path and stopping the impactor at the adjustment position before injecting gas into the pressure chamber. ### Claim 4 (depends on 3) The driver according to claim 3, wherein the control mechanism is configured to perform a fourth control moving the impactor from the adjustment position to the standby position after stopping the impactor at the adjustment position and injecting gas into the pressure chamber. ### Claim 5 (depends on 1) The driver according to claim 1, further comprising a condition judging section configured to judge whether a condition impacting the stopper is satisfied, wherein the standby position is closer to the first position than an intermediate position defined between the second position and the first position, the control mechanism is configured to perform a control stopping the impactor at the standby position when the condition is not satisfied; and a control moving the impactor from the standby position to the first position when the condition is satisfied. ### Claim 6 (depends on 1) The driver according to claim 1, wherein the adjustment position is the second position. ### Claim 7 (depends on 6) The driver according to claim 6, further comprising a stopper configured to stop the impactor at the second position by coming in contact with the impactor when the impactor is moved by a force of the pressure chamber. ### Claim 8 (depends on 4) The driver according to claim 4, wherein the control mechanism is provided with a second operating portion that is operated by an operator before gas is injected into the pressure chamber, and when the second operating portion is operated by the operator the control mechanism performs the third control. ### Claim 9 (depends on 8) The driver according to claim 8, wherein the control mechanism is provided with a third operating portion that is operated by the operator after gas is injected into the pressure chamber, and when the third operating portion is operated by the operator, the control mechanism performs the fourth control. ### Claim 10 (depends on 9) The driver according to claim 9, further comprising: a pressing member that is pressed against an object material into which the stopper is driven; and a trigger that is operated by the operator when the stopper is driven into the object material wherein the control mechanism performs the third control then the pressing member is pressed against the object material and an operation force is applied to the trigger, within a predetermined period of time after the second operating portion is operated by the operator, the control mechanism performs the first control when the pressing member is not pressed against the object material or/and the operation force is not applied to the trigger, within the predetermined period of time after the second operating portion is operated by the operator. ### Claim 11 (depends on 9) The driver according to claim 9, wherein the second operating panel functions as a third operating portion. ### Claim 12 (depends on 1) The driver according to claim 1, further comprising a pressing member that is pressed against an object material into which the stopper is driven, wherein a tip of the impactor stopping at the standby position is positioned between a head of the stopper and a tip of the pressing member. ### Claim 13 (depends on 1) The driver according to claim 1, further comprising an injection portion to which the stopper is supplied and in which the impactor is movably arranged, and a tip of the impactor stopping at the adjustment position protrudes from a tip of the ejection portion in a moving direction of the impactor. ### Claim 14 (depends on 1) The driver according to claim 1, further comprising a detection mechanism configured to detect that the impactor is in the standby position, and that the impactor is in the adjustment position. ### Claim 15 (depends on 3) The driver according to claim 3, wherein the electric motor has: a first rotation direction which is a rotation direction in which the impactor is moved from the second position toward the first position; and a second rotation direction which is opposite to the first rotation direction, and which is a rotation direction in which the impactor is moved from the standby position toward the adjustment position when gas is injected into the pressure chamber. ### Claim 16 (depends on 15) The driver according to claim 15, wherein the power transmission route has a rotation regulatory mechanism configured to regulate the rotation of the electric motor, and the rotation regulating mechanism has: a first state allowing the electric motor to be rotated in the first rotational direction when the impactor is moved from the second position to the first position by the power of the electric motor, and preventing the electric motor from rotating in the second rotational direction; and a second state allowing the electric motor to be rotated in the second rotational direction when the impactor is moved from the standby position to the adjustment position by a pressure of the pressure chamber. ### Claim 17 (depends on 16) The driver according to claim 16, wherein the rotation restricting mechanism has a clutch mechanism and a cancel mechanism, the clutch mechanism has: a rotational element that is integrally rotated in a forward direction together with the electric motor; an engaging portion provided to the rotational element; and a plunger engaged with the engaging portion to restrict the rotation of the rotational element in a direction opposite to the forward direction, and the release mechanism has: a lever configured to move the plunger and to cause the plunger to be disengaged from the engaging portion, in the first state, the plunger is engaged with the engaging portion to prevent the rotational element from being rotated in a reverse direction, and in the second state, the lever causes the plunger and the engaging portion to be disengaged from each other and allows the rotational element to be rotated in the reverse direction. ### Claim 18 (canceled)