JP2785493B2 - Picking forklift safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a picking forklift in which a driver's cab moves up and down integrally with a fork.
In particular, it relates to a safety device provided in a cab.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional general picking forklift. As shown in the drawing, the cab 2 of the picking forklift 1 is attached to a lift bracket (not shown) that moves up and down along a mast 3, and a fork 4 extends forward from a lower surface of the cab 2. Therefore, the driver's cab 2 moves up and down integrally with the fork 4, so that the driver does not fall off the driver's cab 2 between the front pillars 5.
Safety frames 7 and 8 are attached between the front and rear pillars 5 and 6. These safety frames 7 and 8 can be opened and closed around one end as needed at the time of getting on and off or working.

[0003]

However, in the conventional structure as described above, the front and rear pillars 5,
The space between 6 is narrow, making it difficult to get on and off.

Further, since the front pillar 5 and the safety frames 7, 8 are made of square steel and have a configuration in which the safety frames 7, 8 are rotated, a corner projection is formed, which makes the work difficult. There was a problem.

[0005] Further, there is a case where the work is performed with the front safety frame 7 opened as shown in FIG. 8, but in this case, the front pillar 5 and the side safety frame 8 hinder the work efficiency. There is also a problem that is reduced.

[0006]

In order to solve the above-mentioned conventional technical problems, the present invention relates to a picking forklift in which a driver's cab moves up and down integrally with a fork.
In order to surround the driver on the cab and prevent falling,
A safety frame provided to be vertically movable with respect to the cab,
The safety device includes a fixing device for fixing the safety frame at a predetermined position.

[0007]

In such a configuration, the safety frame can be moved upward, so that there is no obstacle around the driver on the driver's cab for getting on or off or for cargo handling.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings, the same or corresponding parts as those in the conventional structure are denoted by the same reference numerals.

In FIG. 1, a picking forklift 1 to which the present invention is applied includes a driver's cab 2 fixed to a lift bracket (not shown) that moves up and down along a mast 3 in the same manner as in the conventional configuration described above. Two forks 4 extend forward from the lower surface of the cab 2. Also,
A head guard pillar 10 for a head guard 9 is vertically provided at a rear corner of the cab 2. A plate 11 is stretched between the left and right head guard pillars 10, a handle 12 and an instrument panel 13 are provided at the center of the plate 11, and an opening 14 with a wire mesh is formed at the upper part.

In this embodiment, the head guard pillar 1
Reference numeral 0 denotes a U-shaped horizontal section, which also functions as a guide rail of the safety frame 15 as described in detail below.

The picking forklift 1 is provided with a safety frame 15 so that a driver does not drop from the cab 2. As clearly shown in FIG. 2, the safety frame 15 has a U-shape, and has a shape substantially coinciding with the outer periphery of the cab 2. Although the illustrated safety frame 15 is formed from a square steel material, it is preferable that the safety frame 15 be formed from a pipe having no corner in terms of workability.

At the left and right free ends of the safety frame 15, respectively,
A safety frame pillar 16 extending vertically downward is fixed.
It is preferable that the safety frame pillar 16 has a length approximately equal to the height to the waist of an average adult male. In such a case, the safety frame pillar 16 is in a state where the lower end thereof is in contact with the cab 2 and is safe. The frame 15 is located near the waist of the driver (the position indicated by the solid line in FIG. 1). Hereinafter, this position is referred to as a normal use position. Also, note that in the present embodiment, there is no pillar at the front corner of the safety frame 15.

An elongated guide plate 17 having substantially the same length as the pillar 16 is fixed to the outer surface of each safety frame pillar 16, and guide rollers 18 are provided on the upper outer surface and the lower outer surface thereof.
Is attached. As shown in FIG. 3, the guide roller 18 is rotatably disposed in a groove inside the corresponding head guard peeler 10. Therefore, safety frame 15
When the user lifts the handle 19, the guide roller 18 is guided in the groove of the head guard pillar 10, and the safety frame 15 is moved along the head guard pillar 10 to a position adjacent to the head guard 9 (hereinafter, this position is referred to as (Referred to as the “top position”). It is easily understood by those skilled in the art that if the distance between the upper and lower guide rollers 18 is increased, the safety frame 15 can be moved up and down more smoothly.

Depending on the material of the safety frame 15, the weight can be reduced, and the safety frame 15 can be easily moved up and down only by human power. However, it is preferable to provide up and down operation assisting means. is there. In the illustrated embodiment, the up / down operation assisting means mainly includes a tension spring 20 and a wire 21. One end of the wire 21 is hooked on a wire hook 22 below the safety frame pillar 16, wound around a pulley 23 attached to an appropriate position of the plate 11 between the head guard peelers 10, and the other end is connected to the plate 11. Is connected to a tension spring 20 fixed to the lower part of the. In such a configuration, a pulling force acts on the safety frame 15 by the tensile force of the spring 20, and the lifting force of the safety frame 15 can be reduced.

The spring force of the tension spring 20 is applied to the safety frame 15
If the safety frame 15 has a size that can overcome the weight of the entirety of the safety frame pillar 16 and the like, the safety frame 15 automatically rises and is held at the uppermost position. Therefore, in order to fix the safety frame 15 at the normal use position, appropriate fixing means is required.
In the illustrated embodiment, a stopper pin 24 is provided so as to protrude inside the right free end of the safety frame 15, and the stopper pin 24 is provided in a hole 25 provided at an appropriate position of the plate 11 between the head guard peelers 10. , The safety frame 15 can be fixed. When releasing the fixing of the safety frame 15, the guide slot 26 of the safety frame 15 is required.
Then, the operation lever 27 of the stopper pin 24 extending therethrough may be pulled, and the stopper pin 24 may be pulled out from the hole 25 of the plate 11. In the figure, reference numeral 28 indicates the safety frame 1
5 is a holder that slidably surrounds 5. Since the tip of the operation lever 27 is embedded in the holder 28,
By moving the holder 28, the stopper pins 2
4 can be inserted and removed.

On the other hand, the spring force of the tension spring 20 is small,
If the safety frame 15 cannot be lifted only by the spring force, a hole 29 (see FIG. 1) into which the stopper pin 24 can be inserted must be provided in the upper part of the plate 11 in order to fix the safety frame 15 at the uppermost position. There is.

As described above, the position for forming the hole for inserting the stopper pin 24 is selected in accordance with the magnitude of the spring force of the tension spring 20, but the safety frame 15 is moved up and down due to vibrations during running. Or the wire 21 is cut and the safety frame 1
In order to prevent the 5 from dropping, it is necessary to enable the application of the stopper pin 24 at at least two positions, that is, the normal use position and the uppermost position.

In the above-described configuration, when it is desired to remove the safety frame 15 from around the driver on the cab 2 at the time of getting on / off or loading / unloading, the stopper pin 24 is moved through the hole 25 of the plate 11. The safety frame 15 is pulled out and raised along the head guard pillar 10 to the uppermost position adjacent to the head guard 9. At this time, the tension spring 20
And the presence of the guide roller 18, the lifting force of the safety frame 15 is reduced, or the safety frame 15 is automatically raised. When the safety frame 15 reaches the uppermost position, the stopper pin 24 is inserted into the hole 29 in the upper part of the plate 11 to fix the safety frame 15 at that position. As a result, since there is no front pillar in the safety frame 15, there is no obstacle around the cab 2 so that getting on / off and loading / unloading can be easily performed. The handle 19 of the safety frame 15 can also be used as a support for the driver at this time.

Conversely, when returning the safety frame 15 from the uppermost position to the normal use position, the operation may be performed in a procedure reverse to the above. That is, after the fixing by the stopper pin 24 is released,
The safety frame 15 is pulled downward against the spring force of the tension spring 20, and the stopper pin 24 is inserted into the hole 25 of the plate 11.

In the above-described embodiment, the safety frame 15 is provided with the safety frame pillar 16 and the guide plate 17, but the safety frame pillar 16 and the guide plate 17 are not necessarily required, and the safety frame 15 can sufficiently save the weight of the driver. Any configuration may be used as long as it can be supported.

As means for guiding the vertical movement of the safety frame 15, instead of arranging the guide roller 18 in the groove of the head guard pillar 10, other means, such as a sliding block in the groove of the head guard pillar 10, may be used. Or a means such as providing a guide rail separately from the head guard pillar 10.

Auxiliary means for reducing the vertical operation force of the safety frame 15 also includes a wire 21 'pulled by a torsion bar 30, as schematically shown in FIG.
As shown in FIG. 5, the wire 21 'is
, Or a wire winding pulley 33 provided on the head guard 9 by a torsion coil spring 32 as shown in FIG.

[0023]

As described above, according to the present invention,
Since the safety frame can be moved up and down, the safety frame is raised as necessary, so that getting on / off and cargo handling can be easily performed.

Further, the pillars on the front side of the safety frame can be eliminated, and complicated projections can be eliminated, so that the workability of loading and unloading can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a picking forklift equipped with a safety device according to the present invention.

FIG. 2 is a perspective view showing the safety device according to the present invention in detail.

FIG. 3 is a plan view, partly in section, of a fixing means and a vertical operation assisting means in the safety device according to the present invention.

FIG. 4 is an explanatory view schematically showing another example of the vertical movement assisting means of the safety frame which can be used in the safety device according to the present invention.

FIG. 5 is an explanatory view schematically showing still another example of the vertical movement assisting means of the safety frame.

FIG. 6 is an explanatory view schematically showing another example of the vertical movement assisting means of the safety frame.

FIG. 7 is a perspective view showing a conventional general picking forklift.

FIG. 8 is an explanatory view showing one mode of a cargo handling operation by a conventional picking forklift.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Picking forklift 2 Driver's cab 4 Fork 10 Head guard pillar 15 Safety frame 18 Guide roller 20 Tension spring 24 Stopper pin 25, 29 hole

Claims (1)

(57) [Claims] 1. A pick-up forklift in which a driver's cab moves up and down integrally with a fork. And a securing means for securing the safety frame at a predetermined position.