JPH092797A - Fork tip obstacle detecting device in automatic guided fork lift - Google Patents

Abstract

PURPOSE: To prevent the pallet position from being moved, and to prevent a pallet from being dropped from a rack caused by contact of a fork, by stopping a reach-out operation before the fork is brought in direct contact with the pallet, an object to be handled, or an obstacle, namely, in the non-contact state. CONSTITUTION: A non-contact type sensor composed of a reflecting type photoelectric sensor 6 for detecting an obstacle is attached on the tip lower part of a fork 2 of an automatic guided fork lift 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fork tip obstacle detecting device in an unmanned forklift.

[0002]

2. Description of the Related Art There is known an unmanned forklift provided with a contact type obstacle detecting device at the tip of the fork. However, this device cannot detect unless the detector directly contacts the pallet or the like. Therefore, there is a problem in terms of safety measures and protection of the handled items.

[0003]

In view of the problems of the prior art, it is necessary to stop the reachout before the fork of the fork comes into direct contact with the pallet or the object to be handled or the obstacle, that is, in the non-contact state. Thus, it is possible to prevent the pallet position from being moved, and to provide a tip obstacle detection device in an unmanned forklift that can prevent the risk of the pallet dropping from the shelf due to the contact of the forks. .

[0004]

A non-contact sensor for detecting an obstacle is attached to a lower portion of a tip of a fork 2 of an unmanned forklift 1.

[0005]

When the fork 2 moves forward in the reach-out operation, if there is an obstacle in front of it, the presence of the obstacle is detected by the reflected light, and the reach-out operation is stopped to stop the pallet or other equipment. Protection and safety can be achieved.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In FIG. 1, 1 is a side fork type unmanned forklift, which allows the pallet 4
The upper baggage 5 is stored (Deposit) or picked up (Pickup) on the shelf 3 of the hangar. A non-contact sensor consisting of a reflective photoelectric sensor 6 is provided below the tip of the fork 2.

When the unmanned forklift 1 picks up the pallet 4 from the shelf 3 (or the transfer station), a reach-out operation is performed to insert the fork 2 into the pallet 4, but at this time, When light is reflected by an obstacle by the reflective photoelectric sensor 6 attached to the tip of the rack 2 and returns, the fork 2 may come into contact with another obstacle (or the pallet 4 itself). Then, the fork-out reach-out operation is stopped immediately and an alarm is issued.

[0008]

[Effect] A non-contact sensor is attached to the lower part of the fork, and the presence or absence of obstacles in front of it can be detected in advance at the time of reach-out.
The protection of luggage, equipment, etc. was perfected without any collision.

[Brief description of drawings]

FIG. 1 shows a state during cargo handling work by an unmanned forklift embodying the present invention.

FIG. 2 is an enlarged view of a fork tip portion of the unmanned forklift in FIG.

FIG. 3 shows a state in which a fork has entered the pallet.

[Explanation of symbols]

1 unmanned forklift 2 forks 3 shelves 4 pallets 5 luggage 6 reflective photoelectric sensors

Claims (1)

[Claims] 1. A fork (2) of an unmanned forklift (1).
A forehead obstacle detection device in an unmanned forklift, characterized in that a non-contact type sensor consisting of a reflective photoelectric sensor (6) for detecting an obstacle is attached to the lower part of the tip of the fork.