JPH10267738A - Loading weight measuring device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle loading weight measuring device which can be attached to a truck, and can measure the loading weight of a cargo loaded on the load carrying platform of the truck to certainly monitor an excessive loading. SOLUTION: A link mechanism 22 is provided between a load carrying platform 18 of a truck 12 and a differential gear box 16 to support the load carrying platform 18 through a plate spring 20, and the quantity of angular displacement generated by the knot section 22A of the link mechanism 22 according to the weight of a cargo loaded on the load carrying platform 18 is measured, and an excessive loading is judged on the measured quantity of the above angular displacement, and thus an excessive loading judging device 10 can be attached to the truck 12 itself and moreover the excessive loading can always be judged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring the weight of a vehicle, and more particularly to a device for measuring the weight of a vehicle which is mounted on a truck and determines overloading of a load loaded on a truck bed.

[0002]

2. Description of the Related Art Conventionally, when judging whether or not the weight of luggage loaded on a loading platform such as a truck is overloaded, conventionally, a truck loaded with luggage is placed on a scale base of a truck scale, and the total weight is measured. Judgment was made by subtracting the tare weight of the truck from the weight.

[0003]

However, a truck scale is a large-scale device, so the equipment cost is high, and in a small-scale delivery warehouse or distribution center where a truck scale cannot be installed, overloading is determined. There is a drawback that you can not. In addition, in the case of loading while collecting and delivering at a plurality of delivery warehouses, the fact is that whether or not overloading depends on the driver's feeling.

The present invention has been made in view of such circumstances, and can be attached to a vehicle, and can easily measure the weight of luggage loaded on the bed of the vehicle to determine whether or not the vehicle is overloaded. It is an object of the present invention to provide a device for measuring the weight of a loaded vehicle.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is a vehicle weight measuring device which is attached to a vehicle and measures the weight of a load loaded on a bed of the vehicle. A link mechanism interposed between the loading platform and a support structure supporting the loading platform via an elastic member; and a support structure in which the loading platform is opposed to the elastic member by the weight of the load loaded on the loading platform. An angular displacement measuring means for measuring an angular displacement formed by a node of the link mechanism as the body approaches, and a load loaded on the carrier based on the measured amount measured by the angular displacement measuring means. And calculating means for calculating the weight of the object.

According to the present invention, a link mechanism is provided between a loading platform and a support structure that supports the loading platform via an elastic member, and a node of the link mechanism is provided according to the weight of the load loaded on the loading platform. The angle variation to be made is measured, and the calculating means calculates the load of the load based on the measured amount. Thereby, the loaded weight can be easily measured, and it can be determined whether or not the vehicle is overloaded.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a preferred embodiment of a vehicle weight measuring apparatus according to the present invention. FIG. 1 is a diagram showing a case where the vehicle weight measuring device of the present invention is mounted on a truck. 2 and 3 are views for explaining the mechanism of the loaded weight measuring device. FIG. 2 is a view of FIG. 1 viewed from the back of the truck (right side of FIG. 1), and FIG. It is sectional drawing of a line.

[0008] As shown in FIG.
Can be attached to the front and rear of the differential gearbox 16 of the rear wheel 14 of the truck 12, for example. As shown in FIGS. 2 and 3, the load weight measuring device 1
0 is mainly the bed 18 of the truck 12 and the bed 18
And a link mechanism 22 interposed between the differential gear box 16 which is a part of a support structure that supports the load via a bow-shaped leaf spring 20, and the weight of the load loaded on the bed 18. An encoder 24 for detecting the amount of angular displacement formed by each of the nodes 22A, 22A, 22A of the link mechanism 22 as it approaches the differential gear box 16 against the spring 20, and a detection detected by the encoder 24. It is composed of a calculator 26 for calculating the load weight of the load loaded on the loading platform 18 based on the amount, and a link mechanism damage prevention device for preventing the link mechanism 22 from being damaged.

The structure of the above-mentioned weight measuring device 10 will be described in detail. The link mechanism 22 connects the two arms of the upper arm 28 and the lower arm 30 with the pins 32.
Is formed. One end of the upper arm 28 is rotatably supported by a horizontal bar 38 horizontally attached to a support fitting 36 bolted to a buffer member 34 fixed to the loading platform 18 to form a node 22A of the link mechanism 22. Is done. On the other hand, one end of the lower arm 30 is rotatably supported by the center shaft 40 of the rotary encoder 24 to form a node 22A of the link mechanism. The encoder 24 is supported by a mounting frame 46 that is mounted and fixed to the differential gear box 16 via a rotating shaft 42 and a bearing 44. In addition, the both ends of the bow-shaped leaf spring 20 are on the loading platform 1.
8 (see FIGS. 1 and 2), and the lowermost portion of the bow shape abuts on a cover 50 that covers the axle 49. Therefore, the lower arm 30 of the link mechanism 22 is
When the load on the load 18 increases and the load 18 sinks against the leaf spring 20, the load 18 rotates clockwise about the central axis 40 of the encoder 24 in FIG. 3. Conversely, when the load weight of the load loaded on the loading platform 18 decreases and the loading platform 18 rises due to the urging force of the leaf spring 20, it rotates counterclockwise in FIG. Then, the encoder 24 measures a displacement θ of an angle formed when the lower arm 30 of the link mechanism 22 rotates about the central axis 40 of the encoder 24. The angular displacement θ detected by the encoder 24 is input to the calculator 26. The location where the arithmetic unit 26 is attached to the truck is not particularly limited, but a portion near the cab is preferable.

The arithmetic unit 26 is input in advance with reference data indicating the relationship between the angular displacement θ and the load weight, and the maximum load weight of the truck to which the load weight measuring device 10 is attached. Accordingly, the calculator 26 compares the measured angular displacement θ with the reference data to calculate the load weight of the load. If the measured loading weight exceeds the maximum loading weight of the truck 12, the arithmetic unit 26 sends the
A signal is output to an alarm (not shown) provided in the driver's cab, and a buzzer is emitted.

As shown in FIG. 3, a mounting frame 46 mounted and fixed to the differential gear box 16 is provided.
(Differential gear) is formed by four fastening plates 52, 52, 52, 52 which are supported by four bolts 51, 51... The box 16 is tightened and fixed. In addition, spacers 54, 54, 54, 5 are provided at both ends of the four bolts 51.
Two support plates 54 are attached to the encoder 24 with the interposition of the encoder 4, and a bearing 44 that supports the encoder 24 via the rotation shaft 42 is attached to the support plate 54.

Next, a link mechanism breakage prevention device will be described. As shown in FIG. 2, a pair of compression springs 56 are provided on the horizontal bar 38 on which one end of the upper arm 28 constituting the link mechanism 22 is supported, with the upper arm 28 interposed therebetween.
The upper arm 28 is pressed from the left and right by a pair of compression springs 56. Thereby, the upper arm 2 of the link mechanism 22 is
8 slides in the axial direction of the horizontal shaft 38 against the urging force of the compression spring 56 when a horizontal external force is applied to the link mechanism 22. On the other hand, the encoder 24 in which one end of the lower arm 30 constituting the link mechanism 12 is supported is mounted on the mounting frame 46 fixed to the differential gear box 16 via the bearing 44 and the rotating shaft 42 as described above. Supported, and the rotating shaft 42 and the encoder 24 are fixed. Thus, the encoder 24 is rotatable with respect to the differential gear box 16, in other words, the differential gear box 16 is
4 to form a rotatable relationship. Therefore, as shown in FIG. 4, one of the left and right rear wheels 14 of the truck 12 rides on the shoulder 62 of the road 60 and the axle 4
When the differential gearbox 16 connected to the wheels 14 via the wheel 9 tilts, the differential gearbox 16 rotates with respect to the encoder 24 by the amount of the tilt. Thus, the external force in the rotational direction applied to the differential gear box 16 via the axle 49 due to the riding of the one wheel 14 can be prevented from being transmitted to the link mechanism 22. Further, a horizontal external force applied to the link mechanism 12 via the differential gear box 16 by the riding of one wheel 14 is absorbed by the upper arm 28 of the link mechanism 12 sliding the horizontal bar 38.

Similarly, when the one wheel 14 comes off the concave portion of the road 60, the link mechanism 12 can be prevented from being damaged for the same reason as the above-mentioned riding. As a result, the link mechanism is not damaged even if the one wheel 14 gets on or off while the truck 12 is running. Next, the operation of the loaded weight measuring device 10 of the present invention configured as described above will be described.

As shown in FIG. 3, the position of the lower arm 30 of the link mechanism 12 in the loading weight measuring device 10 when no load is loaded on the loading platform 18 is represented by A, which corresponds to the maximum loading weight of the truck on the loading platform 18. Assuming that the position of the lower arm 30 when the load to be loaded is B, the lower arm 30 gradually rotates from the position A to the position B as the load is loaded on the loading platform 18. The angular displacement θ formed by the rotational movement of the lower arm 30 is sequentially output to the arithmetic unit 26, and the loaded weight is calculated. When the rotational movement of the lower arm 30 exceeds the position B, the arithmetic unit 26
A signal is sent to the alarm provided in the driver's cab, and the buzzer of the alarm is sounded. This makes it possible to know the load weight of the load loaded on the truck and to reliably monitor overloading. In this case, as shown in FIG. 3, the loading weight measuring device 10 is attached to the front and rear of the differential gear box 16, that is, the front and rear of the truck with the differential gear box 16 interposed therebetween, and the two loading weight measuring devices are measured. By taking the average value of the apparatus 10, even if the load is imbalanced before and after the loading platform, the loaded weight can be accurately measured, so that the overload can be reliably determined.

As described above, the loading weight measuring apparatus 1 of the present invention
Since 0 can be attached to the truck 12, it is extremely effective for trucks that are collected and delivered at a small-sized distribution center or the like that does not have a loading weight measuring means such as a truck scale. Further, the loading weight measuring device 10 of the present invention can be manufactured at extremely low cost as compared with a conventional truck scale.

Further, the load weight measuring device 10 of the present invention is provided with a link mechanism breakage prevention device for preventing the link mechanism 22 constituting the load weight measuring device 10 from being damaged, so that the track 12 can be provided on the uneven road. Even if the vehicle runs, the one wheel 14 rides on the shoulder 62 of the road 60, or the wheel 14 gets off the dent of the road 60, the load measuring device 10 is not damaged.

Although the present embodiment has been described with reference to a truck, the present invention is not limited to a truck but can be applied to any vehicle. Further, the example of the encoder has been described as the angular displacement measuring means, but the present invention is not limited to this, and an angular velocity meter may be used. Further, one end of the link mechanism is supported by the differential gear box, but is not limited to the differential gear box. Further, the example of the differential gear box is shown as a supporting structure for supporting the integral link mechanism. However, the present invention is not limited to this, and the carrier of the vehicle can be supported via an elastic member, and the rotating operation can be performed. Any part that does not move such as may be used.

[0018]

As described above, according to the vehicle weight measuring device of the present invention, the vehicle weight measuring device can be attached to the vehicle. Therefore, even in a small-scale distribution warehouse or distribution center where a truck scale cannot be installed, it is possible to know the load weight of the load and to surely monitor the overload.

Further, in the loading weight measuring apparatus of the present invention, unlike the conventional truck scale, it is not necessary to put the truck itself on the scale base, so that the apparatus can be made compact and the apparatus cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a state in which a loaded weight measuring device according to the present invention is mounted on a truck.

FIG. 2 is an explanatory view of the loaded weight measuring device of the present invention as viewed from the back of a truck.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a state diagram showing a state in which one wheel of a truck rides on a shoulder of a road;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Loading weight measuring device 12 ... Truck 14 ... Rear wheel 16 ... Differential gear box 18 ... Luggage carrier 20 ... Leaf spring 22 ... Link mechanism 22A ... Link mechanism node part 24 ... Encoder 26 ... Calculator 28 ... Link mechanism Upper arm 30 ... Link mechanism lower arm 32 ... Pin 34 ... Buffer member 36 ... Support bracket 38 ... Horizontal bar 42 ... Rotating shaft 44 ... Bearing 46 ... Mounting frame 56 ... Compression spring

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[Procedure amendment]

[Submission date] April 3, 1997

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

Claims (5)

[Claims] An apparatus for measuring the weight of a load mounted on a vehicle and mounted on the carrier of the vehicle, comprising: a support structure for supporting the carrier and the carrier via an elastic member. And a link mechanism interposed between the load mechanism and an angle formed by a node of the link mechanism as the load approaches the support structure against the elastic member by the weight of the load loaded on the load. Angular displacement measuring means for measuring the displacement, and calculating means for calculating the weight of the load loaded on the carrier based on the measured amount measured by the angular displacement measuring means. Vehicle weight measurement device. 2. The vehicle load measuring device according to claim 1, wherein the overload is determined by measuring the load weight on the loading platform by the load weight measuring device. 3. An apparatus according to claim 1, wherein said angular displacement measuring means is an encoder. 4. The load weight measuring device is provided with a link mechanism breakage prevention device for preventing breakage of the link mechanism when one wheel of the vehicle gets on or off. 1. A vehicle weight measuring device. 5. The load weight measuring device according to claim 1, wherein a plurality of the load weight measuring devices are provided in the vehicle, and the load weight is measured from an average value of data obtained from each of the load weight measuring devices.