JPH115700A - Pallet entry detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pallet entry detector purposing that a driver of a car body performs his/her palletizing work accurately and speedily by making simple the detection of a pallet fork entry by a laser marker. SOLUTION: This pallet entry detector consists of a freely movable car body 2 and a mast device 3 loading an article, a lift bracket 5 for moving up and down is arranged in this mast device 3, and a laser marker 9 for lighting up the car body 2 ahead is equipped in the lift bracket 5 together with a pair of right and left forks 6. In this case, in a state that the paired forks 6 is situated at the entry height of a pallet 8, the laser marker 9 is composed so as to irradiate an edge board side face forming both upper and lower sides of this pallet 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an object to simplify the detection of a pallet fork insertion port using a laser marker, so that a driver of a vehicle body can reliably and quickly load a pallet. And a pallet insertion detecting device.

[0002]

2. Description of the Related Art In the prior art, a laser marker 9 provided on a lift bracket 5 is horizontally positioned in front of a vehicle body 2 at a midpoint between left and right forks 6 at the same height as a horizontal plane of the forks 6 as shown in FIG. Irradiated with light. When the driver carries out the unloading work of the pallet 8, the driver moves the irradiation point of the light beam of the laser marker 9 to the beam 8B at the middle part of the pallet 8 shown in FIG.
Was inserted into the insertion port 8C.

[0003]

As can be seen from FIG. 3, the portion of the pallet 8 at the digit 8B has a very small area. When the light beam of the laser marker 9 is shifted right or left, it is not known where the irradiation point 10 of the laser marker 9 is located until the light beam of the laser marker 9 hits the beam 8B. The driver could not judge whether it was good. Therefore, the operation until the light beam of the laser marker 9 hits the beam 8B of the pallet 8, which is a large part of the positioning operation of the fork 6, must be performed by the driver himself, and the function as the pallet insertion detecting device is required. It was not fulfilled.

[0004] The present invention has been devised as a solution that can be implemented at a low cost without changing the conventional apparatus, in order to solve the above-mentioned problems at all.

[0005]

According to the present invention, a lift bracket which comprises a movable vehicle body and a mast device for loading a load, and which moves up and down, is arranged on the mast device. In a pallet insertion detecting device provided with a laser marker for irradiating the front, the laser marker irradiates the side surface of the edge board forming the upper surface or the lower surface of the pallet with the fork positioned at the height of the pallet insertion hole. The above problem is solved as a pallet insertion port detection method having the above configuration.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A counterbalance type forklift (hereinafter referred to as a forklift) 1 according to an embodiment of the present invention will be described below.
The forklift 1 shown in FIG.
Comprises a movable vehicle body 2 and a mast device 3 for loading a load. The mast device 3 includes a lift bracket 5 that moves up and down by expansion and contraction of a lift cylinder 4. The lift bracket 5 includes a pair of left and right forks 6. Is locked.

A hydraulic motor 7 is built in the body 2,
When the operator operates the cargo handling lever 12, the hydraulic motor 7
Rotate, the lift cylinder 4 expands and contracts, and the fork 6 moves up and down via the lift bracket 5.

As shown in FIG. 2, the laser marker 9 which is a feature of the present invention is installed on the lift bracket 5 at a middle point between the left and right forks 6 and slightly above the horizontal plane of the forks 6. The irradiation direction is to irradiate horizontally in front of the vehicle body 2. The position slightly above the horizontal plane of the fork 6 is set so that the irradiation point 10 of the laser marker 9 is located on the upper edge board 8A of the pallet 8 when the fork 6 is at the height of the pallet 8 insertion port 8C. It is that you are.

Specifically, as shown in FIG. 3, when the irradiation point 10 of the laser marker 9 has a set point 10A at the center of the upper edge board 8A of the pallet 8, the height position of the pallet 8
If the left and right positions are set to be at the insertion port 8C of the pallet 8, for example, when the laser marker 9 irradiates the irradiation point 10B of the pallet 8, the fork 6 is moved to set the irradiation point at the set point 10A. You just need to match. Thereafter, the vehicle body 2 of the forklift 1 is moved forward to load the pallet 8.

If the mounting position of the laser marker 9 is small due to the structure of the lift bracket 5, the pallet 8
The lower edge board 8D may be irradiated, or the center of the edge boards 8A and 8D may not be irradiated.

Furthermore, even when the laser marker 9 cannot be mounted horizontally, the mounting angle and position of the laser marker 9 are determined from the edge boards 8A and 8D, the burnt 8B of the pallet 8, and the thickness and length of the fork 6. Thus, the operation of the pallet 8 can be performed in the same manner as in the above embodiment.

[0012]

With the structure as in the above-described embodiment, when the laser marker fixed to the lift bracket irradiates the edge board of the pallet, the position of the fork in the left-right direction can be confirmed. The irradiable range is expanded to several steps, and the work of unloading the pallet of the fork can be performed easily and quickly, which leads to more efficient loading and unloading work. Also, depending on the structure of the lift bracket, if it is difficult to install the laser marker at the middle position between the left and right forks,
The irradiation point may shift to the left or right. Even in this case, the irradiation point can irradiate the edge board, and the pallet can be unloaded using a laser marker.

[Brief description of the drawings]

FIG. 1 shows a side view of a counterbalanced forklift embodying the present invention.

FIG. 2 shows a front view of a lift bracket embodying the present invention.

FIG. 3 shows an overall view of a pallet embodying the present invention.

FIG. 4 shows a side view of a conventional counterbalanced forklift.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Counter balance type forklift 2 Body 3 Mast device 4 Lift cylinder 5 Lift bracket 6 Fork 7 Hydraulic motor 8 Pallet 8A Upper edge board 8B Girder 8C Slot 8D Lower edge board 9 Laser marker 10 Irradiation point 10A Set point 10B Irradiation point 11 Mast Material 12 Loading lever

Claims (1)

[Claims] 1. A mast device for loading a load, comprising a movable vehicle body, a lift bracket that moves up and down is disposed on the mast device, and the lift bracket is provided with a pair of left and right forks and a laser marker that irradiates the front of the vehicle body. In the pallet insertion port detection device, the pallet insertion port detection device is configured by irradiating the side of the edge board that forms the upper or lower surface of the pallet with the fork positioned at the height of the pallet insertion port. Method.