Forklift
AssigneeNippon Yusoki Co., Ltd.
InventorsTutomu Fujita, Yasunobu Tomiyama, Kazumasa Kokura
Life of this patent
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Abstract
A forklift having a pallet lock device. On an upper face of a top end of a lock bar to lock a pallet, a tapered portion is disposed. When a fork is inserted into the pallet, the tapered portion comes into contact with an end face of the pallet and the lock bar rotates downward. When a landing sensor is turned on by a magnet disposed on the lock bar, the lock bar is immediately driven and the locking operation is started. Then, the top end of the lock bar pushes or comes into pressure contact with an upper face of a lower deck board of the pallet, and the pallet is locked.
Claims17
A forklift comprising:
- a fork to be inserted into a pallet;
- a hoisting device for hoisting the fork;
- and
- a pallet lock device for locking the pallet, the pallet lock device having a lock bar which is pushable a lower deck board of the pallet to lock the pallet,
- wherein the pallet lock device releases the lock of the pallet when an intensity of a force given to the lock bar from the lower deck board exceeds a predetermined value.
A forklift comprising:
- a fork to be inserted into a pallet;
- a hoisting device for hoisting the fork;
- a pallet lock device for locking the pallet;
- a pallet detector for detecting an insertion of the fork into the pallet;
- and
- an upward movement detector for detecting an upward movement of the fork,
- wherein the pallet lock device locks the pallet after the pallet detector detects the insertion of the fork into the pallet and the upward movement detector detects the upward movement of the fork of a predetermined distance.
A forklift comprising:
- a fork to be inserted into a pallet;
- a hoisting device for hoisting the fork;
- a pallet lock device for locking the pallet;
- and
- a pallet detector for detecting an insertion of the fork into the pallet,
- wherein the pallet lock device locks the pallet when the pallet detector detects that the pallet reaches a predetermined position close to a base end portion of the fork.
A forklift comprising:
- a fork to be inserted into a pallet;
- a hoisting device for hoisting the fork;
- a pallet lock device for locking the pallet;
- and
- a pallet detector for detecting an insertion of the fork into the pallet,
- wherein the pallet lock device locks the pallet when the fork is hoisted by the hoisting device in state where the pallet detector detects the insertion of the fork into the pallet.
A forklift comprising:
- a fork to be inserted into a pallet;
- a hoisting device for hoisting the fork;
- a pallet lock device for locking the pallet;
- and
- a fork position detector,
- wherein the pallet lock device locks the pallet when the fork position detector detects that the fork inserted into the pallet is located at the position close to the lower face of the upper deck board.
A forklift comprising:
- a fork to be inserted into a pallet;
- a hoisting device for hoisting the fork;
- and
- a pallet lock device for locking the pallet,
- wherein the pallet lock device comprises:
- a lock bar which is movable to a first position protruding from an upper face of the fork, a second position located lower than the first position, and a third position located lower than the second position and coming into contact with a lower deck board of the pallet;
- a detector for detecting a displacement of the lock bar from the first position to the second position;
- and
- a lock bar driver for displacing the lock bar to the third position when the detector detects the displacement of the lock bar.
Dependencies are inferred from the claim text.