JP2001206686A - Floodlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mark horizontal and vertical positioning quickly and easily with only one floodlight. SOLUTION: A light source 14 is arranged at the rear section in a tube body, a lens 13 is arranged at the front section in the tube body, and a cross- shaped projection mark (a) is projected through the lens 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector for irradiating a cross-shaped irradiation mark, and more particularly to an effect for positioning a fork when carrying out a cargo handling operation with a forklift.

[0002]

2. Description of the Related Art FIG.
There are the following. This is because a pair of outer masts 2 are erected at the front end of the vehicle body 1 so as to be tiltable, and a lift bracket 4 is arranged on both outer masts 2 via a pair of left and right inner masts 3 so as to be able to move up and down. Bracket 4
A pair of left and right forks 5 is attached to the vehicle, and a lift cylinder 6 for raising and lowering both forks 5 via both inner masts 3 and lift brackets 4 is provided.

In the above configuration, when unloading the luggage W stored in the storage space 7a of the storage shelf 7 via the pallet P, the operator M sits on the seat 8a of the driver's cab 8 to unload. By operating the steering handle 9a and the switching lever 9b of the driving operation unit 9, the direction of the vehicle body 1 is adjusted, and both forks 5 are moved up and down to be visually positioned on a predetermined pallet P (see virtual lines in FIG. 7). Then, the body 1 is advanced, the forks 5 are inserted into the pallet P, the forks 5 are slightly raised, and the load W is lifted. Just move it up to. When the luggage W is stored in each storage space 7a, the operation may be performed in a procedure reverse to the above.

[0004]

In the above-mentioned conventional configuration,
The tips of both forks 5 are relatively far away from the cab 8, and the masts 2 and 3 obstruct the view, and the tips of both forks 5 are often viewed obliquely from behind. Therefore, it takes time to position the tips of both forks 5 on the pallet P, and the work efficiency is low.

In order to solve the above-mentioned problem, a light projector called a so-called laser pointer is attached to the lift bracket 4, and a linear irradiation mark is vertically or horizontally radiated from the light projector toward the center of the pallet P, so that both forks are used. It is conceivable to perform positioning of No. 5.

However, when irradiating a vertical line-shaped irradiation mark, although positioning in the left-right direction can be easily performed, positioning in the vertical direction is difficult, and irradiation with a horizontal line-shaped irradiation mark is difficult. In this case, the positioning in the vertical direction can be easily performed, but the positioning in the horizontal direction is difficult.

Therefore, two light emitters are attached to the lift bracket 4, and one of the light emitters irradiates a vertical linear irradiation mark to the center of the pallet P to position the two forks 5 in the left-right direction, and to position the other forks 5 in the other direction. A horizontal line-shaped irradiation mark is emitted from the projector to the center of the pallet P,
It is conceivable to position the forks 5 in the vertical direction.

In the above configuration, since the positioning of both forks 5 in the left-right direction and the positioning in the vertical direction are performed separately, the positioning takes time and effort, is troublesome, and uses two projectors. Therefore, the number of parts increases and the production cost increases.

An object of the present invention is to provide a projector capable of performing quick and easy positioning with only one unit in view of the conventional disadvantages.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a light source is disposed at a rear portion of a cylinder, and a lens is disposed at a front portion of the cylinder. A cross-shaped irradiation mark is emitted from a light source through a lens.

[0011] According to the above arrangement, the positioning in the horizontal direction is performed by the vertical axis of the cross-shaped irradiation mark irradiated from the light source through the lens, and the vertical positioning is performed by the horizontal axis of the cross-shaped irradiation mark. (1) Up, down, left, and right positioning can be performed quickly and easily with only one irradiation mark. Further, since the positioning is performed by only one projector, the number of parts is small and the manufacturing cost is low.

According to a second aspect of the present invention, in the first aspect, the light source comprises a laser diode.

According to the above configuration, since the laser diode having excellent directivity is used, it is possible to irradiate the irradiation mark clearly and to reduce the size and weight.

According to a third aspect of the present invention, there is provided the first or second aspect.
In the above invention, the lens is a cylindrical lens.

According to the above-described configuration, simply by applying a light beam from the light source to the cylindrical lens, the light beam can be expanded in a line shape to irradiate a cross-shaped irradiation mark.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the cylindrical body is attached to a substantially central portion between the two forks of the forklift toward the front. And

According to the above arrangement, the left and right positioning of the forks can be accurately performed by using the irradiation mark radiated from the cylindrical body attached forward substantially at the center between the two forks of the forklift as a mark. it can.

A fifth aspect of the present invention is characterized in that, in the fourth aspect of the present invention, the cylindrical body is mounted at substantially the same height as the horizontal portions of the two forks.

According to the above configuration, the vertical positioning of both forks can be accurately performed by using the irradiation mark radiated from the cylinder provided at substantially the same height as the horizontal portion of both forks as a mark.

[0020]

1 and 2 show a state in which a floodlight 11 according to one embodiment of the present invention is mounted on a lift bracket 4 of a forklift.
Is a so-called laser pointer.
As shown in FIG.
2 forwardly through a lens 13 located at the front
Is provided. The same reference numerals as in the conventional example shown in FIG. 7 denote the same parts in the configuration other than the above, and a description thereof will be omitted.

The light source 14 is composed of a laser diode, which is small and lightweight, has excellent directivity, and can clearly emit a red laser beam.

As shown in FIGS. 3 and 4, the lens 13 has a disk portion 13a, a vertical ridge portion 13b and a horizontal ridge portion integrally formed in a cross shape on a side face of the disk portion 13a facing the light source. 13c, the projections 13b and 13c are formed of cylindrical lenses in which the light source facing surfaces of the projections 13b and 13c are formed in an arc shape. Irradiate a cross-shaped irradiation mark a which spreads linearly along the ridges 13b and 13c.

As shown in FIG. 2, the cylindrical body 12 has a horizontal line H connecting the horizontal portions 5a of the two forks 5 at the center between the two forks 5 at the same distance D from the two forks 5.
As shown in FIG. 3 (c),
The fork 5 is fixed to the lift bracket 4 by a fixing tool 15 such as a screw, and the upper and lower and left and right positioning of the forks 5 can be accurately performed using the irradiation mark a irradiated from the cylindrical body 12 as a mark.

As shown in FIG. 5, a light source push button 16 for turning on or off the light source 14 is provided in the operation section 9. Reference numeral 17 denotes a key switch.

The procedure for unloading work in the above configuration will be described. The operator M sits on the seat 8a of the cab 8 and the steering handle 9a
By operating the switching lever 9b, the direction of the vehicle body 1 is adjusted, the forks 5 are raised and lowered, and the light source push button 16 of the driving operation unit 9 is pressed to turn on the light source 14, and the light source 14 A cross-shaped irradiation mark a is irradiated through 13 (see FIG. 4).

Next, as shown in FIG. 6, the positions of the two forks 5 are adjusted so that the vertical axis a1 of the cross-shaped irradiation mark a is irradiated onto the center of a predetermined pallet P. And the positions of the two forks 5 are adjusted so that the horizontal axis a2 of the cross-shaped irradiation mark a irradiates substantially the center of the insertion port Pa of the pallet P. Up and down position.

Thereafter, the vehicle body 1 is advanced and the forks 5
Into the outlet Pa of the pallet P, and the forks 5
, The luggage W is lifted slightly, the body 1 is moved backward, the forks 5 are lowered, and the body 1 is moved to a predetermined position. When the luggage W is stored in each storage space 7a, the operation may be performed in a procedure reverse to the above.

In the above embodiment, the light projector 11 is used for positioning a fork of a forklift. However, the present invention is not limited to this. For example, the light projector 11 is used for positioning or centering various kinds of cargo handling machines and construction machines. It can also be used as

Although the cross-shaped irradiation mark a is irradiated by the lens 13 composed of a cylindrical lens, the invention is not limited to this. The cross-shaped irradiation mark may be irradiated by the lens 13 of various shapes. It may be.

[0030]

According to the first aspect of the invention, the positioning in the left-right direction is performed by the vertical axis of the cross-shaped irradiation mark irradiated from the light source through the lens, and the vertical direction is determined by the horizontal axis of the cross-shaped irradiation mark. , Positioning up, down, left, and right can be quickly and easily performed using only one irradiation mark. In addition, the positioning
Since only one projector is used, the number of parts is small and the production cost is low.

According to the second aspect of the present invention, since the laser diode having excellent directivity is used, it is possible to irradiate the irradiation mark clearly and to reduce the size and weight.

According to the third aspect of the present invention, simply by applying a light beam from the light source to the cylindrical lens, the light beam can be spread in a line shape to irradiate a cross-shaped irradiation mark.

According to the fourth aspect of the present invention, the positioning of the forks in the left-right direction can be accurately performed by using the irradiation mark radiated from the cylindrical body attached to the substantially central portion between the forks of the forklift toward the front as a mark. Can be done.

According to the fifth aspect of the present invention, the positioning of the two forks in the up-down direction is accurately performed by using the irradiation mark irradiated from the cylinder provided at substantially the same height as the horizontal portion of both the forks as a mark. be able to.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a projector according to an embodiment of the present invention is attached to a lift bracket of a forklift.

FIG. 2 is a front view of the forklift.

3A is a horizontal sectional view of the light projector, FIG. 3B is a vertical sectional view of the projector, and FIG. 3C is a front view of the same.

FIG. 4 is an exploded perspective view of a main part of the light projector.

FIG. 5 is a perspective view of the driving operation unit.

FIG. 6 is a front view showing a state where the irradiation mark is irradiated on a pallet.

FIG. 7 is a side view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 4 Lift bracket 5 Fork 5a Horizontal part of fork 11 Floodlight 12 Cylindrical body 13 Lens (cylindrical lens) 14 Light source (laser diode) a Irradiation mark

Claims (5)

[Claims] 1. A light source is arranged at a rear part of a cylinder, and a lens is arranged at a front part of the cylinder, and a cross-shaped irradiation mark is emitted from the light source through the lens. A floodlight. 2. The light projector according to claim 1, wherein said light source comprises a laser diode. 3. The light projector according to claim 1, wherein said lens comprises a cylindrical lens. 4. The floodlight according to claim 1, wherein said cylindrical body is mounted forward at a substantially central portion between both forks of a forklift. 5. The floodlight according to claim 4, wherein said cylindrical body is mounted at substantially the same height as the horizontal portions of said forks.