Driver

Patent metadata

Field	Value
Publication number	US-11472012-B2
Application number	US-201916968472-A
Country	US
Kind code	B2
Filing date	Jan 25, 2019
Priority date	Feb 19, 2018
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

A driver includes: a pressure chamber and a striking portion actuated in a direction of striking a fastener when compressed gas is supplied to the pressure chamber, and can select a single firing and a continuous firing; a switching mechanism having a first actuated state to actuate the striking portion in the direction when the single firing is selected and a second actuated state to block the striking portion from being actuated in the direction when the continuous firing is selected; and a control unit configured to switch the switching mechanism from the first actuated state to the second actuated state when a predetermined time elapses in a state where the continuous firing is selected and the switching mechanism is in the first actuated state. The control unit stops the power supply to the switching mechanism for at least part of a period of time when the predetermined time elapses.

First claim

The invention claimed is:

1. A driver comprising:
a pressure chamber;
a striking portion actuated in a direction of striking a fastener when compressed gas is supplied to the pressure chamber; and
a first operation member and a second operation member configured to control the striking of the fastener,
wherein the driver is configured to select a single firing in which the striking portion is actuated in the direction of striking the fastener when an operation force is applied to the first operation member while an operation force is applied to the second operation member and a continuous firing in which the striking portion is actuated in the direction of striking the fastener when the operation force is applied to the second operation member while the operation force is applied to the first operation member,
wherein the driver further comprises:
a switching mechanism having a first control state in which the striking portion is actuatable in the direction of striking the fastener and a second control state in which the striking portion is blocked from being actuated in the direction of striking the fastener; and
a control unit configured to switch a state of the switching mechanism between the first control state and the second control state,

wherein the control unit controls supplying power to the switching mechanism when switching the state of the switching mechanism between the first control state and the second control state, and the switching mechanism maintains the first control state or the second control state even when the power supplied to the switching mechanism is stopped, and
wherein the control unit performs
a first control in which, when the continuous firing is selected, the power is supplied to the switching mechanism to change the state of the switching mechanism from the second control state to the first control state and then the power supplied to the switching mechanism is stopped, and
a second control in which, when a predetermined time elapses in a state where the continuous firing is selected and the switching mechanism is in the first control state, the power is supplied to the switching mechanism to change the state of the switching mechanism from the first control state to the second control state and then the power supplied to the switching mechanism is stopped.

2. The driver according to claim 1 ,
wherein the control unit stops the power supplied to the switching mechanism for at least part of a period of time when a predetermined time elapses.

3. The driver according to claim 1 , further comprising:
a pressure accumulation chamber configured to store the compressed gas; and
a gas supply mechanism configured to supply the compressed gas of the pressure accumulation chamber to the pressure chamber,
wherein the gas supply mechanism has a strikable state in which, when the operation force is applied to the first operation member and the second operation member, the compressed gas of the pressure accumulation chamber is supplied to the pressure chamber and an unstrikable state in which, when the operation force to at least one of the first operation member and the second operation member is released, the compressed gas of the pressure accumulation chamber is not supplied to the pressure chamber.

4. The driver according to claim 3 ,
wherein the switching mechanism is configured to connect or disconnect a first path for transmitting the operation force applied to the first operation member and the second operation member to the gas supply mechanism,
the first control state of the switching mechanism is a state of connecting the first path, and
the second control state of the switching mechanism is a state of disconnecting the first path.

5. The driver according to claim 3 , further comprising:
a first passage configured to supply the compressed gas of the pressure accumulation chamber to the pressure chamber;
a control chamber to which the compressed gas of the pressure accumulation chamber is supplied and from which it is exhausted;
a second passage configured to supply and exhaust the compressed gas to and from the control chamber; and
an opening/closing mechanism configured to close the first passage when the compressed gas is supplied to the control chamber and open the first passage when the compressed gas is exhausted from the control chamber,
wherein the switching mechanism includes a valve configured to open and close the second passage,
the first control state of the switching mechanism is a state in which the valve opens the second passage when the compressed gas is supplied to the control chamber, and
the second control state of the switching mechanism is a state in which the valve closes the second passage when the compressed gas is supplied to the control chamber.

6. The driver according to claim 3 , further comprising a second path to transmit the operation force applied to the second operation member to the first operation member,
wherein the operation force applied to the second operation member is transmitted to the gas supply mechanism through the first operation member,
the switching mechanism can connect and disconnect the second path,
the first control state of the switching mechanism is a state of disconnecting the second path, and
the second control state of the switching mechanism is a state of connecting the second path.

7. The driver according to claim 1 ,
wherein the control unit is activated when power is supplied and is stopped when power is not supplied, and
the driver further comprising a power supply mechanism configured to stop the power supply to the control unit when the single firing is selected and supply the power to the control unit when the continuous firing is selected.

8. The driver according to claim 1 ,
wherein the control unit is activated when power is supplied and is stopped when power is not supplied, and
the driver further comprising a power supply mechanism configured to supply the power to the control unit even when any of the single firing and the continuous firing is selected.

9. The driver according to claim 1 ,
wherein the switching mechanism includes a solenoid, a solenoid valve, or a servo motor.

10. The driver according to claim 1 ,
wherein the solenoid or the solenoid valve includes:
a plunger actuated in a predetermined direction when power is supplied; and
a permanent magnet configured to stop the plunger at a predetermined position in an actuation direction when the power is not supplied.

11. The driver according to claim 1 ,
wherein the single firing restricts the striking portion from being actuated in the direction of striking the fastener when the operation force is applied to the first operation member and then the operation force is applied to the second operation member.

12. A driver comprising:
a pressure chamber;
a pressure accumulation chamber configured to store compressed gas; and
a gas supply mechanism configured to supply the compressed gas of the pressure accumulation chamber to the pressure chamber,
a striking portion actuated in a direction of striking a fastener when the compressed gas is supplied to the pressure chamber;
a first operation member and a second operation member configured to control the gas supply mechanism to supply the compressed gas to the pressure chamber;
a switching mechanism including a movable part having a first position to transmit operation force applied to the first operation member and the second operation member to the gas supply mechanism, and a second position not to transmit the operation force applied to the first operation member and the second operation member to the gas s

Assignees

• Koki Holdings Co Ltd

Inventors

• Ootsuka Kazuhiro

Classifications

• B25C1/008

  Safety devices · CPC title

• B25C1/04

  operated by fluid pressure {, e.g. by air pressure} · CPC title

• B25C1/047 Primary

  Mechanical details · CPC title

• B25C1/043 Primary

  Trigger valve and trigger mechanism · CPC title