JP5361630B2 - Load measuring device and tank truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a load capacity measuring apparatus easily installable to an existing tank truck and capable of reducing an installation cost of a measuring system, and the tank truck. <P>SOLUTION: The load capacity measuring apparatus includes a weight measuring instrument 6 for measuring a weight of the tank truck 1 by placing wheels 2 thereon; an elevating device 7 secured to an undercarriage 3 and capable of lowering the weight measuring instrument 6 onto the ground by elevating the weight measuring instrument 6 before or behind the wheels 2; and a guide device 8 guiding the weight measuring instrument 6 in a back-and-forth direction of the tank truck 1 against the elevating device 7, and guiding the wheels 2 onto the weight measuring instrument 6, if the tank truck 1 moves with the weight measuring instrument 6 placed on the ground. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention collects liquids such as sewage such as urine and household wastewater in a container (tank) mounted on a chassis (chassis) and measures the loading capacity of a tank car such as a sanitary car (vacuum car) to be transported. The present invention relates to a load measuring device and a tank truck equipped with the same.

  2. Description of the Related Art Conventionally, a system for measuring a loaded weight in a tank car such as a sanitary car is known. For example, in Patent Documents 1 to 3, a load cell is disposed below a tank mounted on a chassis, and the weight in the tank is measured by correcting the measured value of the load cell according to the inclination angle of the chassis. Is disclosed.

JP-A-8-93045 JP 2005-114425 A Japanese Patent Laid-Open No. 2002-340662

  However, when the conventional measurement system is mounted on an existing tank car, it is necessary to disassemble the completed car, separate the tank from the car body, and incorporate a load cell between the car body and the tank. Therefore, in order to equip this measuring system, there is a problem that a great deal of cost is required.

  Therefore, an object of the present invention is to provide a load measuring device and a tank car that can be easily mounted on an existing tank car and can reduce the equipment cost of the measurement system.

  The load amount measuring device of the present invention is a load amount measuring device that measures the load amount of a tanker vehicle in which a tank is mounted on a chassis equipped with wheels, for measuring the weight of the tanker vehicle by placing the wheel. A weight measuring instrument, a lifting device fixed to the chassis, and capable of moving the weight measuring device in front of or behind the wheel to reach the ground, and the weight measuring device with respect to the lifting device. And a guide device that guides the wheels so that the wheels are placed on the weight measuring device when the tank truck moves while the weight measuring device is placed on the ground. .

  According to the present invention, when measuring the loading amount of the tanker truck, the weight measuring device is lowered by the lifting device and reaches the ground. Then, if the tank truck is moved with this weight measuring instrument placed on the ground, the weight measuring instrument is guided by the guide device and retained on the spot, and the lifting device moves together with the tank truck to measure the weight of the wheel. Since it is placed on the vessel, the weight of the tank car on which the wheel is placed can be measured by the weight measuring device. Thereby, the loading capacity of the tank car can be calculated based on the weight of the tank car.

  Here, it is desirable that the weight measuring device is arranged so that the left and right wheels on the rear side of the chassis are respectively mounted. Thereby, the rear wheel axle weight of the tank car can be measured by the weight measuring device, and the loading amount of the tank car can be calculated based on the rear wheel axle weight of the tank car.

  Moreover, it is desirable that the weight measuring device is a plate material on which wheels are placed and supported at three points by a load cell. Thereby, even if the tank car is arranged on an inclined surface, the weight of the tank car can be accurately measured by the load cell that supports the plate material on which the wheel is placed at three points.

  Further, the load measuring device of the present invention is based on a tilt sensor that detects the tilt angle of the chassis, and a calibration curve that indicates the relationship between the tilt angle, the weight of the tank car, and the load capacity of the tank car that has been created in advance. Calculation means for calculating the loading amount of the tank truck from the inclination angle detected by the inclination sensor and the weight of the tank truck measured by the weight measuring device, and display means for displaying the loading amount of the tank truck calculated by the calculation means It is desirable to have.

  As a result, even if the weight distribution of each wheel of the tank truck changes due to the tilt angle of the chassis, the tank truck can be accurately loaded from the tilt angle detected by the tilt sensor and the weight of the tank truck measured by the weight measuring instrument. The amount can be calculated. Also, the calculated tank car load is displayed on the display means.

(1) A weight measuring device for measuring the weight of a tank truck mounted on a wheel and a weight measuring device fixed to the chassis, and can be moved up and down in front of or behind the wheel to reach the ground. A lifting device and a guide device that guides the weight measuring device so that it can move forward and backward with respect to the lifting device. When the tank vehicle moves while the weight measuring device is placed on the ground, the weight measuring device The weight of the tank truck can be measured by a weight measuring device that is fixed to the chassis and moves up and down in front of or behind the wheels. This load capacity measuring device can be installed by attaching a lifting device, a guide device and a weight measuring device to the chassis, so that it can be easily mounted on an existing tank car, reducing the equipment cost of the measuring system. be able to.

(2) Since the weight measuring device is arranged so that the left and right wheels on the rear side of the chassis are respectively mounted, the rear wheel axle weight of the tank vehicle can be measured by the weight measuring device. Based on the rear wheel axle weight, it becomes possible to calculate the loading amount of the tank truck more accurately.

(3) Since the weight measuring device supports the plate material on which the wheel is mounted at three points by the load cell, the plate material on which the wheel is mounted is supported at three points even when the tank truck is disposed on the inclined surface. The load cell can accurately measure the weight of the tank truck, and more accurately calculate the loading capacity of the tank truck.

(4) The tilt angle detected by the tilt sensor based on the tilt sensor that detects the tilt angle of the chassis, and a calibration curve that shows the relationship between the tilt angle, the weight of the tank truck, and the loading capacity of the tank truck that has been created in advance. And calculating means for calculating the tank truck load from the weight of the tank truck measured by the weight measuring instrument, and display means for displaying the tank truck load calculated by the calculator. Even if the weight distribution of each wheel of the tank truck changes due to the tilt angle of the chassis, the loading capacity of the tank truck is more accurately calculated from the tilt angle detected by the tilt sensor and the weight of the tank truck measured by the weight measuring instrument. Can be calculated.

It is a rear left side view of a tank truck provided with a load capacity measuring device in an embodiment of the invention. It is a left view which shows the state which lowered | hung the weight measuring device of FIG. It is a left view which shows the state during the weight measurement of the tank truck by the weight measuring device of FIG. It is a top view of the load amount measuring apparatus of FIG. It is a rear view of the load amount measuring apparatus of FIG. It is a perspective view which shows the state which removed the upper surface board of the weight measuring device of FIG. It is a figure which shows the example of a calibration curve. It is a perspective view which shows another embodiment of a load measuring device.

  1 is a left side view of a rear portion of a tank truck provided with a load capacity measuring device according to an embodiment of the present invention, FIG. 2 is a left side view showing a state in which the weight measuring device of FIG. 1 is lowered, and FIG. FIG. 4 is a plan view of the load measuring device of FIG. 1, FIG. 5 is a rear view of the load measuring device of FIG. 1, and FIG. It is a perspective view which shows the state which removed the weight measuring device of FIG.

  In FIG. 1, a tank car 1 equipped with a load capacity measuring device according to an embodiment of the present invention has a tank 4 mounted on a chassis 3 having wheels 2. The tank 4 collects sewage such as manure and liquids such as household wastewater. Further, a load amount measuring device 5 for measuring the load amount of the tank car 1 is provided behind the wheel 2 of the tank car 1.

  The load amount measuring device 5 includes a weight measuring device 6 that mounts the wheels 2 and measures the rear wheel axle weight of the tank truck 1, a lifting device 7 that lifts and lowers the weight measuring device 6, and the weight measuring device 6 to the lifting device 7. Thus, the guide device 8 that guides the tank car 1 so as to be able to move forward and backward, the tilt sensor 9 that detects the tilt angle of the chassis 3, and the weight of the tank car 1 measured by the weight measuring device 6 and the tilt sensor 9 Calculation means (not shown) for calculating the loading amount of the tank truck 1 from the inclination angle of the chassis 3 and display means (not shown) for displaying the calculation result by the calculation means are provided.

  The weight measuring device 6 is disposed behind the left and right wheels 2 behind the chassis 3 as shown in FIGS. 4 and 5, and the tank truck is placed on the ground as described later. When 1 moves rearward, the left and right wheels 2 are respectively placed as shown in FIGS.

  As shown in FIG. 6, the weight measuring device 6 has load cells 61 a, 61 b, 61 c arranged at two places on the bottom plate 60 at the front left and right and one place at the rear center. On these load cells 61a, 61b, 61c, a plate material 62 on which the wheel 2 is placed is disposed, and the plate material 62 is supported at three points by the load cells 61a, 61b, 61c. Further, springs 63 as cushioning materials are arranged at the four corners of the plate material 62 in order to reduce the impact when the wheel 2 is placed.

  The elevating device 7 is fixed to the chassis 3. The elevating device 7 elevates and lowers the weight measuring device 6 behind the wheel 2. The lifting device 7 raises the weight measuring device 6 as shown in FIG. 1 during normal traveling of the tank truck 1 so as not to obstruct traveling. On the other hand, as shown in FIG. 2, the lifting device 7 can cause the weight measuring device 6 to reach the ground when the load amount is measured.

  The elevating device 7 includes a support member 70 extending in the width direction of the tank truck 1, an air cylinder 71 disposed at both ends of the support member 70 and elevating and lowering the support member 70, and is extendable and has a lower end. An extendable guide 72 fixed to the support member 70 and having an upper portion fixed to the chassis 3 is provided. The telescopic guide 72 guides the support member 70 so as to move up and down vertically when the support member 70 is moved up and down by the air cylinder 71.

  The guide device 8 guides the weight measuring device 6 so as to be able to advance and retract in the front-rear direction of the tank truck 1 with respect to the lifting device 7. The guide device 8 includes a connecting member 80 that connects the left and right weight measuring devices 6, and a support member 81 that supports the connecting member 80 so that the connecting member 80 can move forward and backward in the front-rear direction of the tank truck 1. It is configured. The support material 81 is configured to be stretchable. When the tank truck 1 moves rearward with the weight measuring device 6 placed on the ground as shown in FIG. 2, the weight measuring device 6 is kept in place as shown in FIG. The elevating device 7 moves together with the tank car 1 so that the wheel 2 is placed on the weight measuring device 6.

  The calculation means measures the inclination angle detected by the inclination sensor 9 and the weight measuring device 6 based on a construction curve showing the relationship between the inclination angle prepared in advance, the weight of the tank car 1 and the loading capacity of the tank car 1. The loading amount of the tank car 1 is calculated from the weight of the tank car 1 thus obtained. The tilt sensor detects a tilt angle from the horizontal line of the chassis 3, that is, an absolute tilt angle, and a known sensor can be used.

  FIG. 7 shows an example of a calibration curve. In this calibration curve, a predetermined amount of loaded water is loaded into the tank 4 of the tank car 1, the tank car 1 is intentionally inclined, and the weight of the tank car 1 is measured by the weight measuring device 6 at a plurality of points. . Then, the load water amount is changed, the same measurement is performed a plurality of times, and the relationship between the actual weight that is the predetermined load water amount and the value measured by the weight measuring device 6 is plotted according to the inclination angle of the chassis 3. To do. Thereby, the calibration curve according to the inclination angle of the chassis 3 is obtained.

  Based on the calibration curve, the calculation means calculates the actual weight of the tank car 1 from the inclination angle detected by the inclination sensor 9 and the weight of the tank car 1 measured by the weight measuring device 6, and further the tank car 1 The weight of the collected material in the tank 4, that is, the load amount is calculated in consideration of the weight of the tank. The display means displays the loading amount of the tank truck 1 calculated by the calculation means.

  In the tank car 1 having the above-described configuration, when measuring the loading amount of the tank car 1, the weight measuring device 6 is lowered from the state shown in FIG. 1 by the lifting device 7 and reaches the ground as shown in FIG. When the tank truck 1 is moved in a state where the weight measuring instrument 6 is placed on the ground, the weight measuring instrument 6 is guided by the guide device 8 and retained on the spot, and the lifting device 7 moves together with the tank truck 1. Then, the wheel 2 is placed on the weight measuring device 6 as shown in FIG.

  Thereby, the weight of the tank truck 1 on which the wheel 2 is mounted can be measured by the weight measuring device 6. At this time, since the weight measuring device 6 is arranged so that the left and right wheels 2 behind the chassis 3 are mounted, the rear wheel axle weight of the tank truck 1 is measured. At this time, the inclination angle of the chassis 3 is measured by the inclination sensor 9, and the load amount of the collected substance in the tank 4 is calculated based on the calibration curve by the calculation means and displayed on the display means.

  As described above, in the tank truck 1 having the above-described configuration, the chassis 3 is mounted on the weight measuring instrument 6 by moving the chassis (tank truck 1) rearward without causing the chassis 3 to be lifted by another mechanism, and the load amount is measured. It is possible. In the tank car 1, the volume of the load can be calculated from the specific gravity of the load, and the volume can be displayed on the display device as the load amount.

  When the tank truck 1 is moved forward after the measurement is finished, the left and right wheels 2 descend from the weight measuring instrument 6, so that the tank truck 1 is moved forward until the state shown in FIG. When 6 is raised, as shown in FIG. Therefore, the weight measuring device 6 does not interfere with traveling during the normal traveling of the tank car 1. Then, it is possible to measure the load by lowering the weight measuring device 6 anytime and anywhere. Since the load measuring device 5 can be mounted by attaching the lifting device 7, the guide device 8 and the weight measuring device 6 to the chassis 3, it can be easily mounted on the existing tank car 1, and the measurement is performed. System equipment costs can be reduced.

  In this tank car 1, even if the weight distribution of each wheel 2 of the tank car 1 changes due to the inclination angle of the chassis 3, the tank car measured by the inclination angle detected by the inclination sensor 9 and the weight measuring device 6. The load amount of the tanker vehicle 1 can be accurately calculated from the weight of 1.

  Moreover, in the tank car 1 in this embodiment, since the weight measuring device 6 supports the plate material 62 on which the wheel 2 is placed at three points by the load cells 61a, 61b, 61c, the tank car 1 is disposed on the inclined surface. Even in such a case, it is possible to accurately measure the weight of the tank truck 1 by the load cells 61a, 61b, 61c that support the plate member 62 on which the wheel 2 is placed at three points.

  Further, as shown in FIG. 8, the load amount measuring device 5 in the present embodiment may include a lifting device 10 that is operated by an electric motor 11 instead of the lifting device 7 that is operated by an air cylinder 71. Is possible. In FIG. 8, the same reference numerals are given to the components common to the above-described load capacity measuring device 5, and detailed description thereof is omitted.

  As shown in FIG. 8, in the lifting device 10, the tip of the wire 12 wound up by the electric motor 11 is fixed to the connecting member 80 via a pulley 13 that is rotatably supported by the support member 70. Thereby, when the weight measuring device 6 is lowered, the wire 12 is sent out by the electric motor 11 or the electric motor 11 is freely rotated, and the weight 12 is weighted by its own weight. The measuring instrument 6 is lowered.

  Then, when the tank truck 1 moves rearward with the weight measuring instrument 6 placed on the ground, the weight measuring instrument 6 is kept in place, and the lifting device 10 moves together with the tank truck 1 to move the weight measuring instrument 6. The wheel 2 comes on top. On the other hand, when lifting the weight measuring device 6, the wire 12 is wound up by the electric motor 11, whereby the connecting member 80 is pulled backward, and when the rear end position is reached, the connecting member 80 is lifted together with the support member 70.

  Thereby, the weight measuring instrument 6 is accommodated in the lower back of the chassis 3 and the tank truck 1 can be run. The elevating device 10 operated by the electric motor 11 does not require a space for the air cylinder 7 to be expanded and contracted unlike the elevating device 7 operated by the air cylinder 71 described above. Mounting on the car 1 becomes easier.

  In addition, in this embodiment, although the raising / lowering apparatus 7 is set as the structure which raises / lowers the weight measuring device 6 in the back of the wheel 2, it can also be set as the structure which raises / lowers the weight measuring device 6 in the front of the wheel 2. . In this embodiment, the wheel 2 behind the chassis 3 is placed on the weight measuring device 6 and the weight of the tank truck 1 is measured. The wheel 2 in front of the chassis 3 is placed on the weight measuring device 6. A configuration for measuring the weight of the tank truck 1 can also be adopted.

  The load amount measuring device of the present invention is useful as a device for measuring the load amount of a tanker vehicle such as a sanitary vehicle that collects and transports liquid such as sewage such as manure or household wastewater in a container mounted on a chassis. Particularly, it is suitable as a load measuring device that can be easily mounted on an existing tank car and can reduce the equipment cost of the measuring system.

DESCRIPTION OF SYMBOLS 1 Tank car 2 Wheel 3 Chassis 4 Tank 5 Loading capacity measuring device 6 Weight measuring device 7,10 Lifting device 8 Guide device 9 Inclination sensor 11 Electric motor 60 Bottom plate 61a, 61b, 61c Load cell 62 Plate material 63 Spring 70 Support material 71 Air cylinder 72 Telescopic Guide 80 Connecting Material 81 Support Material

Claims (5)

A loading capacity measuring device for measuring a loading capacity of a tanker vehicle in which a tank is mounted on a chassis equipped with wheels,
A weight measuring device for placing the wheel and measuring the weight of the tank car;
A lifting device fixed to the chassis, capable of moving the weight measuring device in front of or behind the wheel, and allowing the weight measuring device to reach the ground;
A guide device that guides the weight measuring device so as to be able to advance and retreat in the front-rear direction of the tank car with respect to the lifting device, and the weight measurement is performed when the tank car moves while the weight measuring device is placed on the ground. A load amount measuring device having a guide device for guiding the wheel to be placed on a vessel.   The load measuring device according to claim 1, wherein the weight measuring device is arranged so that left and right wheels on the rear side of the chassis are respectively mounted.   The load measuring device according to claim 1, wherein the weight measuring device is a device in which a plate material on which the wheel is mounted is supported at three points by a load cell. An inclination sensor for detecting an inclination angle of the chassis;
The tank measured by the inclination angle detected by the inclination sensor and the tank based on the calibration curve indicating the relationship between the inclination angle prepared in advance, the weight of the tank truck, and the loading capacity of the tank truck Calculating means for calculating the tank car load from the weight of the car;
The load amount measuring apparatus according to claim 1, further comprising display means for displaying a load amount of the tank car calculated by the calculation means.
  A tanker vehicle comprising the load measuring device according to any one of claims 1 to 4.

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