Driving machine

Patent metadata

Field	Value
Publication number	US-10569402-B2
Application number	US-201715413421-A
Country	US
Kind code	B2
Filing date	Jan 24, 2017
Priority date	Jan 26, 2016
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

The disclosure discloses a driving machine includes a trigger, a first switch turned on or off by an operation of the trigger, a push lever that moves in response to an operation of pressing an ejection port of a fastener against a driven material, and a second switch turned on or off by movement of the push lever. The driving machine drives the fastener when the first switch and the second switch are both in the ON state. The trigger includes a switching mechanism to switch between a single-shot driving mode and a continuous-shot driving mode.

First claim

What is claimed is:

1. A driving machine, comprising:
a driver blade that strikes a fastener;
a striking driving element serving as a driving source to cause the driver blade to reciprocate;
a first switch for activating the striking driving element;
a trigger operated by an operator to set the first switch to an ON state or an OFF state;
a push lever supported to be movable in a direction parallel to a movement direction of the driver blade and moving in response to an operation of pressing a front end of an ejection port of the fastener against a driven material;
a second switch opened and closed by a movement of the push lever and set to an ON state when the push lever is at a top dead center and set to an OFF state when the push lever is at a bottom dead center; and
a movable member that is disposed in the trigger and is in contact with a plunger of the first switch,
wherein the driving machine drives the fastener with the striking driving element when the first switch and the second switch are both in the ON state,
wherein the trigger comprises a driving switching mechanism to switch between a single-shot driving mode, which drives one fastener every time the trigger is pulled, and a continuous-shot driving mode, which drives a plurality of the fastener continuously by repeatedly pressing the push lever against the driven material and releasing the push lever in a state of keeping the trigger pulled,
wherein a guiding groove is disposed to partially overlap the movable member,
a switching member inside the guiding groove is moved in a longitudinal direction of the movable member and sets the movable member to be in one of a single-shot position and a continuous-shot position.

2. The driving machine according to claim 1 , wherein the trigger comprises a trigger lever that is swingable around a swing shaft,
the driving switching mechanism and the movable member is disposed in the trigger lever,
the movable member is movable relative to the trigger lever and is able to be positioned at a first position where the plunger is not operated by an operation of the trigger lever and a second position where the plunger is operated by the operation of the trigger lever.

3. The driving machine according to claim 2 , further comprising a piston that is connected to the driver blade,
wherein the striking driving element comprises compressed air and moves the piston,
the first switch is a switching valve of an air flow path, which serves as a trigger to supply the compressed air to the piston, and is operated by the trigger lever, and
the second switch is a switching valve interposed in series in the air flow path and performs opening and closing operations by the movement of the push lever.

4. The driving machine according to claim 2 , wherein in the single-shot driving mode, after the fastener is driven, the movable member moves from the second position to the first position, such that the first switch is not operated; and in the continuous-shot driving mode, after the fastener is driven, the movable member remains at the second position to maintain the first switch in an operable state.

5. The driving machine according to claim 4 , wherein the movable member is of a swing type and is swingable by a predetermined angle around a rotating shaft that is disposed in the trigger lever,
a direction in which a swing end of the trigger lever extends from the swing shaft and a direction in which a swing end of the movable member extends from the rotating shaft are opposite directions, and
the switching member is disposed in the trigger lever to allow or prevent swing of the movable member.

6. The driving machine according to claim 5 , wherein the switching member comprises a rod type switching member,
the switching member is moved inside the guiding groove in a longitudinal direction of the movable member, so as to set one of the single-shot position and the continuous-shot position, wherein the single-shot position is where the movable member is movable between the first position and the second position, and the continuous-shot position is where the movable member is fixed to the second position.

7. The driving machine according to claim 6 , wherein in the single-shot driving mode, if the trigger is operated after the push lever is pressed against the driven material, the movable member moves from the first position to the second position due to contact with the push lever to be able to move the plunger of the first switch; and
if the trigger is operated before the push lever is pressed against the driven material, because the movable member and the push lever are in a non-contact state, the movable member remains at the first position and is not able to move the plunger of the first switch.

8. The driving machine according to claim 7 , wherein when the fastener is driven in the single-shot driving mode, the movable member and the push lever are released from a contact state by releasing the push lever from a state of being pressed against the driven material, and
the movable member returns to the first position from the second position by a force of an urging spring.

Assignees

• Hitachi Koki Kk
• Koki Holdings Co Ltd

Inventors

• Iijima Yoshimitsu
• Kitagawa Hiroki

Classifications

• B25C1/043

  Trigger valve and trigger mechanism · CPC title

• B25C1/008 Primary

  Safety devices · CPC title