JP2650791B2 - Weighing equipment for forklift trucks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weighing device for a forklift truck.

[0002]

2. Description of the Related Art A forklift truck is constructed as shown in FIG. The finger bar 2a disposed near the front wheel 1 is driven up and down by a lift cylinder (not shown). An auxiliary plate 2b is attached to the finger bar 2a via a first load cell 3a and a second load cell 3b. A fork 4 originally used by being attached to the finger bar 2a is attached to the auxiliary plate 2a.
b.

The fixed side I and the movable side II of the first and second load cells 3a and 3b are respectively connected to a first fork hook 2
a, is firmly fastened to the second fork hook 2b with the bolt 5. The cargo weight is the first and second load cells 3
It is calculated based on the sum of the detected loads a and 3b.

[0004]

In such a conventional configuration, the finger bar 2a, the first and second load cells 3a and 3b, and the auxiliary plate 2b are completely assembled by being bolted. The difference in the coefficient of linear expansion of each part, the misalignment of the mounting position of the fork 4 on the auxiliary plate 2b,
Due to the unbalanced load received from the load lifted by the fork 4, the first and second load cells 3a and 3b are twisted by the lateral force Δf and the moment θ, so that accurate weighing cannot be performed.

It is an object of the present invention to provide a weighing device for a forklift truck which is not affected by the twisting due to the lateral force Δf and the moment θ as described above, and can improve the measuring accuracy.

[0006]

SUMMARY OF THE INVENTION A weighing device for a forklift truck according to the present invention is a forklift truck in which a plurality of forks are attached to a finger bar. A load cell is provided, and calculation means for adding the weighed value of each load cell to obtain a weighed value is provided.

[0007]

According to this structure, the load cell is interposed between each fork and the finger bar. When two forks are used, the first load cell is disposed between the first fork and the finger bar. Is interposed, and a second load cell is interposed between the second fork and the finger bar. Then, the outputs of the first and second load cells are added by a calculating means to obtain a weight value.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. It is to be noted that components having the same functions as those in FIG. 3 showing a conventional example are denoted by the same reference numerals.

The first and second forks 4a and 4b have the same shape, and the first fork 4a is attached to a first latch 6a via a first load cell 3a. The fork 4b is attached to the second latch 6b via the second load cell 3b.

The first and second latches 6a and 6b are hooked on the finger bar 2a. The first and second load cells 3a and 3b are connected to calculation means 8 via codes 7a and 7b, and the calculation means 8 uses the output W1 of the first load cell 3a and the output W of the second load cell 3b.
The weight value is calculated by adding 2, and the calculated value of the calculating means 8 is supplied via a code 10 to a weight indicator 9 mounted at a position readable from the driver's seat and displayed. Note that the calculating means 8 is actually attached at a position near the backrest 11 or the weight indicator 10, and the codes 7a,
Power is supplied to the first and second load cells 3a and 3b via the switch 7b.

With this configuration, the two load cells 3a and 3b are independent of each other, and are not coupled to each other by bolting, so that there is no interference such as moment.
An accurate weight value is obtained. Further, when replacing with another attachment that is not a fork, the attachment can be separated into the first fork 4a side and the second fork 4b side, so that two forks are removed at once as in the conventional case. Compared with the required weighing device, it does not handle heavy objects, is safe in work, and has good workability.

In the above embodiment, the weight indicator 10 and the calculating means 8 are provided separately, but they may be housed in the same housing.

[0013]

As described above, according to the present invention, in a forklift truck using a plurality of forks attached to a finger bar, a load cell is provided between each fork and the finger bar independently for each fork. Since the calculation means for adding the weighed values of the load cells to obtain the weighed value is provided, there is no need to connect a plurality of load cells to each other, and there is no interference such as moment, and an accurate weighed value can be obtained.

Further, even when replacing with an attachment other than a fork, compared with a conventional weighing device in which two forks must be removed at a time, a heavy object is not handled and the operation is safe and work is possible. The properties are good.

[Brief description of the drawings]

FIG. 1 is a perspective view of a front part of a forklift truck to which a forklift truck weighing device of the present invention is attached.

FIG. 2 is a side view of the device.

FIG. 3 is a perspective view of a conventional weighing device for a forklift truck.

[Explanation of symbols]

 2a finger bar 3a, 3b 1st, 2nd load cell 4a, 4b 1st, 2nd fork 6a, 6b 1st, 2nd latch 8 Calculation means 9 Weight indicator

Claims (1)

(57) [Claims] In a forklift truck using a plurality of forks attached to a finger bar, each fork is independently provided between each fork and the finger bar.
Provide load cells and add the weight values of each load cell.
A weighing device for a forklift truck provided with calculation means for calculating the weighing value .