KR102561256B1 - Tractors for container yards that can prevent conduction - Google Patents

Abstract

The present invention can not only easily detect the unbalanced load of the trailer loaded with containers, but also warn the driver of the detected unbalanced load of the trailer to provide the driver with sufficient time to cope with the unbalanced load generated on the trailer. It relates to a container yard tractor capable of preventing overturning of the tractor by reducing the speed of the tractor to a certain speed or less depending on whether a trailer loaded with a container has an eccentric load, and is provided on the rear side of the vehicle body, In a tractor equipped with a coupler to which a kingpin of a traction unit provided at a front side of a trailer loaded with containers is coupled, a load measuring unit measuring a load applied to one side of the coupler; another side load measuring unit for measuring a load applied to the other side of the coupler; an eccentric load determination unit for determining an unbalanced load by comparing a load measurement value of the load measurement unit on one side and a load measurement value of the load measurement unit on the other side; It characterized in that it comprises a; control unit for controlling the brake of the tractor based on the determination result of the eccentric load determination unit.

Description

Tractors for container yards that can prevent conduction}

The present invention can not only easily detect the unbalanced load of the trailer loaded with containers, but also warn the driver of the detected unbalanced load of the trailer to provide the driver with sufficient time to cope with the unbalanced load generated on the trailer. The present invention relates to a tractor for a container yard capable of preventing tipping of the tractor by driving the tractor at a reduced speed below a certain speed depending on whether an eccentric load occurs on a trailer loaded with containers.

Conventionally, a container yard has a gate through which a tractor carrying out or carrying in a container enters.

When entering the gate, the driver driving the tractor drives along the road to the designated equipment area and waits.

In the designated equipment area, a transfer crane that unloads containers is disposed.

When a container is carried in, the container is unloaded from the tractor by a transfer crane, and the container is loaded in a predetermined area.

In addition, when the container is carried out, the container is loaded onto the tractor by the transfer crane.

After loading and unloading of containers is completed, the tractor drives to the gate through the road and then advances to the outside of the container yard.

In such a container yard, the running roads on which the tractors run intersect vertically and horizontally, and a plurality of tractors transporting containers move back and forth on the running roads.

For this reason, at intersections such as crossroads or crossroads, multiple tractors face each other when going straight, turning right, or turning left, and they stop or drive little by little while judging each other's situation by the eye contact of the driver driving the tractor.

Then, according to the judgment of the driver driving the tractor, one tractor yields the road to the other tractor while waiting at the intersection.

In addition, there are cases in which a person is arranged near an intersection to give priority to one tractor or to direct traffic by giving instructions.

However, in this method, there is a problem in that a plurality of tractors do not run smoothly at an intersection and the efficiency of loading and unloading is lowered.

In order to solve this problem, recently, a container yard and a container yard driving control method for enabling smooth driving when a plurality of tractors enter an intersection of driving roads have been proposed in Japanese Patent Laid-open Publication No. 2006-182455.

In the Japanese Patent Laid-open Publication No. 2006-182455, a signal device installed at an intersection of traveling roads to pass or stop tractors and transfer cranes by a lighting signal, and detecting the speed and distance of all tractors and transfer cranes entering the intersection The tractor and the transfer crane were driven according to the priorities determined based on the sensor and the speed and distance detected by the sensor.

However, in the case of Japanese Unexamined Patent Publication No. 2006-182455, a device and method for detecting an unbalanced load of the trailer due to a container loaded on the trailer are not presented, giving the driver enough time to cope with the unbalanced load generated on the trailer. In addition, there is a problem that the tractor is overturned by the eccentric load generated on the trailer.

Japanese Unexamined Patent Publication No. 2006-182455

The present invention was created to solve the above problems, and not only can easily detect the unbalanced load of a trailer loaded with containers, but also warns the driver of the detected unbalanced load of the trailer so that the driver is aware of the unbalanced load generated on the trailer. A tractor for a container yard capable of providing sufficient time to cope with it and, furthermore, being able to prevent the tractor from tipping over by reducing the speed of the tractor to a certain speed or less depending on whether or not an eccentric load occurs on the trailer loaded with containers. Its purpose is to provide

The present invention for achieving the above object is provided on the rear side of the vehicle body, in the tractor equipped with a coupler to which the kingpin of the tow unit provided on the front side of the trailer loaded with containers is coupled, one side of the coupler is applied One side load measurement unit for measuring the load being carried; another side load measuring unit for measuring a load applied to the other side of the coupler; an eccentric load determining unit comparing a load measurement value of the one side load measurement unit and a load measurement value of the other side load measurement unit to determine an unbalanced load; It provides a container yard tractor capable of tipping prevention, characterized in that it includes; a controller for controlling the brakes of the tractor based on the determination result of the eccentric load determination unit.

Here, it is preferable that the load measuring unit on one side and the load measuring unit on the other side are made of a load cell or a strain gauge.

In addition, one side step groove and the other side step groove are formed on one side and the other side of the coupler, respectively, and the one side load measuring part and the other side load measuring part are respectively formed on the bottom surface of the one side step groove and the bottom surface of the other side step groove. It is preferable to include; a load supporting plate on one side and a load supporting plate on the other side, which are provided with a seat, and are accommodated in the step groove on one side and the step groove on the other side while being horizontally seated on the upper portion of the load measuring unit on one side and on the upper side of the load measuring unit on the other side, respectively. do.

Alternatively, one side step groove and the other side step groove are formed on one side and the other side of the coupler, respectively, and the bottom surface of the one side step groove and the bottom surface of the other side step groove are respectively formed in the upper direction of the one side step groove and the other side step groove. One protruding jaw and the other protruding jaw protruding at a certain height in the upper direction of the stepped groove are formed, and the one side load measuring unit and the other load measuring unit are seated on the upper part of the one protruding jaw and the upper part of the other protruding jaw, respectively. and a one-side load supporting plate accommodated in the one-side stepped groove in a state in which the one-side load measuring unit and the one-side protruding jaw are inserted into the one-side lower groove formed therein; It is preferable to include; the other side load supporting plate accommodated in the other side step groove in a state where the other side load measuring part and the other side protruding jaw are inserted into the other side lower groove formed therein.

Alternatively, one side groove and the other side groove are formed on one side and the other side of the coupler, respectively,

The one side load measuring part and the other load measuring part are seated on the bottom surface of the one groove and the bottom surface of the other groove, respectively, and the one side load measuring part and the other load measuring part are installed inside the one side groove and the other groove. It is preferable that one side protective cover and the other side protective cover are provided to protect the one side load measurement unit and the other side load measurement unit in a state accommodated in the.

Here, the one side protective cover and the other side protective cover are preferably made of a filler filled in the one side groove and the other side groove, respectively, in which the one side load measuring unit and the other side load measuring unit are seated on the bottom surface.

Furthermore, it is preferable that a warning generating unit generating a warning signal is provided, and the control unit controls the warning generating unit according to the determination result of the eccentric load determining unit.

The present invention is provided on one side and the other side of the coupler of the tractor, respectively, and one side load measurement unit and the other side load measurement unit for measuring the load applied to the coupler; The eccentric load of the trailer loaded with the container can be easily detected through the eccentric load determination unit that compares the load measurement value of the one side load measurement unit and the load measurement value of the other side load measurement unit to determine the eccentric load. By warning the driver of the unbalanced load, the driver can provide enough time to cope with the unbalanced load generated on the trailer, and furthermore, based on the determination result of the unbalanced load determination unit, the control unit controls the brake of the tractor to drive the tractor at a constant speed. It is possible to drive at a speed lower than that of the tractor, so there is an effect of preventing the fall of the tractor.

1 is a partially enlarged side view schematically showing a container yard tractor capable of tipping prevention, which is an embodiment of the present invention;
2 is a plan view schematically showing a coupler provided with one load measuring unit and the other load measuring unit according to an example;
Figure 3 is a cross-sectional view taken along line A - A of Figure 2 schematically showing an example of one load measuring unit and the other load measuring unit installed in the coupler,
4 is an exploded cross-sectional view of FIG. 3;
5 is a cross-sectional view schematically showing another example in which one load measuring unit and the other load measuring unit are installed in a coupler;
6 is an exploded cross-sectional view of FIG. 5;
7 is a plan view schematically showing a coupler provided with one load measuring unit and the other load measuring unit of another example;
8 is a cross-sectional view taken along line B - B of FIG. 7 schematically showing an example in which one load measuring unit and the other load measuring unit of another example are installed in a coupler;
9 is a block diagram schematically showing a control state of a control unit;
10 is a flowchart schematically showing the operation process of the warning generating unit;
11 is a flowchart schematically illustrating a process of operating a brake.

Hereinafter, a preferred embodiment of the present invention will be described in more detail based on the accompanying drawings. Of course, the scope of the present invention is not limited to the following examples, and can be variously modified and implemented by those skilled in the art without departing from the technical gist of the present invention.

1 is a partially enlarged side view schematically showing a tractor for a container yard capable of preventing a fall, which is an embodiment of the present invention.

A container yard tractor capable of tipping prevention, which is an embodiment of the present invention, includes a load measuring unit on one side, a load measuring unit on the other side, an eccentric load determining unit, and a control unit.

First, as shown in FIG. 1, a coupler 7 is provided on the rear side of the vehicle body 3, and the coupler 7 has a kingpin of the towing unit 51 provided on the front side of the trailer 5 loaded with containers. (510) is bound.

2 is a plan view schematically showing a coupler provided with one load measuring unit and the other load measuring unit of one example, and FIG. 3 is A of FIG. - A cross-sectional view taken along line A, and FIG. 4 is a separate cross-sectional view of FIG.

The one-side load measuring unit 10 is for measuring a load applied to one side of the coupler 7 due to an unbalanced load of a trailer loaded with containers, and may be provided on one side of the coupler 7.

In addition, the other side load measuring unit 20 is for measuring a load applied to the other side of the coupler 7 due to the unbalanced load of the trailer loaded with the container, and may be provided on the other side of the coupler 7. .

The one side load measuring unit 10 and the other side load measuring unit 20 may be made of various types, and for example, in particular, high precision and low influence of temperature change and eccentric inclination load, the principle is simple, and the configuration is simple. It can be manufactured robustly with few parts, and it can be made into a load cell that is easy to manufacture even in waterproof and internal pressure, and has no restrictions on the use environment and is easy to install and remove.

Next, in order to greatly improve the load measurement efficiency of the load measuring unit 10 on one side and the load measuring unit 20 on the other side, which may be made of load cells, as shown in FIGS. 3 and 4, for example, One side stepped groove 71 and the other stepped groove 72 may be recessed to a predetermined depth in one side and the other side of the coupler 7, respectively.

One side, the front side, the rear side, and the top of the one-side stepped groove 71 may be opened so that the cross-sectional shape of the one-side stepped groove 71 may be formed in a '┛' shape, for example.

The step groove 71 on the other side may be formed symmetrically with the step groove 71 on the one side.

The one side load measuring unit 10 and the other side load measuring unit 20, each of which may be made of a load cell, are bolted to the middle of the bottom surface of the one side stepped groove 71 and the other side to the middle of the bottom surface of the stepped groove 72. It may be provided with a seat in various ways, such as.

As shown in FIGS. 2 to 4, the upper part of the one side load measuring part 10 which may be made of a load cell and the upper part of the other load measuring part 20 which may be made of a load cell in the front and rear direction of the coupler 7 One side load supporting plate 11 and the other side load supporting plate 21 extending a certain length may be accommodated in the one side step groove 71 and the other side step groove 72 in a state of being horizontally seated, respectively.

As the one-side load-bearing plate 11 presses the one-side load measuring unit 10 due to the unbalanced load generated in the container trailer, the one-side load measuring unit 10, which may be made of a load cell, of the coupler 7 The load applied to one side can be measured.

As the other side load measuring unit 21 presses the other side load measuring unit 20 due to the unbalanced load generated in the container trailer, the other side load measuring unit 20, which may be made of a load cell, of the coupler 7 The load applied to the other side can be measured.

The load supporting plate 11 on one side and the load supporting plate 21 on the other side may be made of various materials such as elastic materials such as rubber and silicon or metal materials.

5 is a cross-sectional view schematically showing another example in which one load measuring unit and the other load measuring unit are installed in a coupler, and FIG. 6 is a separate cross-sectional view of FIG. 5 .

Next, in order to easily prevent the one side load supporting plate 11 and the other load supporting plate 21 from being separated from the one side stepped groove 71 and the other side stepped groove 72 by external force, FIG. 5 and As shown in FIG. 6, in the middle of the bottom surface of the one-side stepped groove 71 and the middle of the bottom surface of the other-side stepped groove 72, the upper direction of the one-side stepped groove 71 and the other side stepped groove 72 One protruding jaw 711 and the other protruding jaw 721 protruding at a certain height in the upper direction may be formed.

In addition, the one side load measurement unit 10 and the other side load measurement unit 20, which may be made of load cells, are respectively attached to the upper part of the one side protruding jaw 711 and the upper side of the other side protruding jaw 721 by bolt fixing. It can be equipped with a seat in a way.

Furthermore, the one-side lower groove 110 may be recessed to a predetermined depth in the lower middle portion of the one-side load supporting plate 11 .

The one side load supporting plate 11 is in a state in which the one side load measuring unit 10 and the one side protruding jaw 711, which may be made of a load cell, are inserted into the one side lower groove 110 of the one side load supporting plate 11. It may be accommodated in the step groove 71 on one side.

The lower surface of the one-side load-bearing plate 11 is the bottom of the one-side stepped groove 71 in a state where the one-side load measuring unit 10, which can be made of a load cell, is in surface contact with the upper inner surface of the one-side lower groove 110. It can be spaced apart at a certain height from the surface.

In addition, the other lower groove 210 may be recessed to a predetermined depth in the lower middle portion of the other load supporting plate 21 .

With the other load measuring unit 20 and the other side protruding jaw 721 retracted into the other lower groove 210 of the other side load supporting plate 21, which may be made of a load cell, the other side load supporting plate 21 is It can be accommodated in the other stepped groove 72.

The lower surface of the other load supporting plate 21 is at a certain height from the bottom surface of the other stepped groove 72 while the other load measuring part 20 is in surface contact with the upper inner surface of the other lower groove 210. can be separated

7 is a plan view schematically showing a coupler provided with one load measuring unit and the other load measuring unit of another example, and FIG. 8 is B of FIG. 7 schematically showing another example of one load measuring unit and the other load measuring unit installed in the coupler. - Sectional view along line B.

Next, as another example, the one side load measuring unit 10 and the other side load measuring unit 20 can measure minute dimensional changes, and from the size, it is possible to know the stress that is important for confirming strength or safety. It can be composed of strain gauges that are widely used in automobiles and aircraft as well as in huge structures such as bridges and dams.

The load measuring unit 10 on one side and the load measuring unit 20 on the other side, which may be formed of strain gauges, may extend left and right along the axle with a predetermined length from one side of the axle to the other.

Next, the load measurement efficiency of the one-side load measuring unit 10 and the other load measuring unit 10, which can be made of strain gauges, is greatly improved, and the one-side load measuring unit 10, which can be made of strain gauges, and the In order to safely protect the other load measuring unit 20 from external force, for example, as shown in FIGS. 7 and 8, one side groove 73 and the other side groove ( 74) may be formed by indenting to a certain depth.

The one side load measuring part 10 and the other side load measuring part 20, which may be made of strain gauges, are fixed by spot welding between the bottom surface of the one side groove 73 and the bottom surface of the other side groove 74, respectively. It may be provided with a seat in various ways, such as.

Next, one side protective cover 12 and the other side protective cover 22 for more safely protecting the one side load measuring unit 10 and the other side load measuring unit 20, which may be made of strain gauges, from external force, etc. may be provided.

The one side load measuring unit 10 and the other side load measuring unit 20, which may be made of strain gauges, are accommodated in the lower inner side of the one side protective cover 12 and the lower inner side of the other side protective cover 22, respectively. The one side protective cover 12 and the other side protective cover 22 may be provided in the one side groove 73 and the other side groove 74, respectively.

The one side protective cover 12 and the other side protective cover 22 may be made of various types, but as an example, in particular, the one side load measuring unit that may be made of a strain gauge inside the one side protective cover 12 (10) and the other side, which may be made of a strain gauge inside the other side protective cover 22, to further improve the load measurement efficiency of the load measuring unit 10, the one side that may be made of a strain gauge The load measuring unit 10 and the other load measuring unit 20 are made of fillers of various types of elastic materials such as silicon filled in the one side groove 73 and the other side groove 74 respectively seated on the bottom surface. can

As the one-side protective cover 12 presses the one-side load measuring part 10, which can be made of a strain gauge, by the unbalanced load generated in the container trailer, the one-side load measuring part 10 that can be made of a strain gauge A load applied to one side of the coupler 7 can be measured.

As the other side protective cover 22 presses the other side load measuring unit 20, which can be made of a strain gauge, by the eccentric load generated in the container trailer, the other side load measuring unit 20 that can be made of a strain gauge A load applied to the other side of the coupler 7 can be measured.

9 is a block diagram schematically illustrating a control state of the control unit, and FIG. 10 is a flowchart schematically illustrating an operation process of a warning generating unit.

Next, the eccentric load determining unit 30 compares the measured load value of the one side load measuring unit 10 and the measured load value of the other side load measuring unit 20 to determine the eccentric load. It may be provided in various positions, such as being provided in the control unit 50.

When the load measurement value of the one side load measurement unit 10 exceeds the load measurement value of the other side load measurement unit 20, the eccentric load determination unit 30 moves the container toward one side of the coupler 7. It can be determined that the unbalanced load of the trailer 5 has occurred.

When the load measurement value of the other load measurement unit 20 exceeds the load measurement value of the one side load measurement unit 10, the eccentric load determination unit 30 moves the container toward the other side of the coupler 7. It can be determined that the unbalanced load of the trailer 5 has occurred.

There is an advantage in that the eccentric load of the trailer 5 loaded with the container can be easily detected through the one side load measurement unit 10, the other side load measurement unit 20, and the eccentric load determination unit 30.

Next, as shown in FIG. 9 , a warning generating unit 40 generating a warning signal may be provided.

Also, the control unit 50 may control the warning generating unit 40 according to the determination result of the eccentric load determining unit 30 .

The warning generating unit 40 warns the driver of the detected eccentric load of the trailer and provides the driver with enough time to cope with the eccentric load generated on the trailer. It can be.

The control unit 50 may be provided in various positions, such as being installed on a vehicle body while maintaining a predetermined distance from the warning generating unit 40 .

For example, the warning generating unit 40 includes a speaker generating a warning signal through a warning sound; It may be made of any one or all of light emitting members such as LEDs that generate warning signals through light.

The speaker of the warning generating unit 40 may output a warning signal for notifying that an unbalanced load of the container trailer 5 has occurred on one side or the other side of the coupler 7 through different warning sounds.

For example, as shown in FIG. 10 , when the load measurement value of the one side load measurement unit 10 exceeds the load measurement value of the other side load measurement unit 20, the eccentric load determination unit 30 determines the coupler It can be determined that the unbalanced load of the container trailer 5 has occurred in the direction of one side of (7), and at this time, the speaker of the warning generating unit 40 is powered by the power supply unit 51 under the control of the control unit 50. When power is supplied from the controller, a warning sound such as 'buzzer sound' or 'eccentric load has occurred on one side of the coupler' can be output.

When the load measurement value of the other load measurement unit 20 exceeds the load measurement value of the one side load measurement unit 10, the eccentric load determination unit 30 moves the container toward the other side of the coupler 7. It can be determined that an unbalanced load of the trailer 5 has occurred, and at this time, under the control of the control unit 50, the speaker of the warning generating unit 40 receives power from the power supply unit 51 and emits a 'siren sound'. Alternatively, a warning sound such as 'An eccentric load has occurred on the other side of the coupler' can be output.

The light emitting member of the warning generating unit 40 may output a warning signal to notify that an eccentric load of the container trailer 5 has occurred on one side or the other side of the coupler 7 through light of different colors. there is.

For example, when the load measurement value of the one side load measurement unit 10 exceeds the load measurement value of the other side load measurement unit 20, the eccentric load determination unit 30 determines one side of the coupler 7 It can be determined that the unbalanced load of the container trailer 5 has occurred in the direction, and at this time, under the control of the control unit 50, the light emitting member of the warning generating unit 40 receives power from the power supply unit 51. It can emit 'red' light.

When the load measurement value of the other load measurement unit 20 exceeds the load measurement value of the one side load measurement unit 10, the eccentric load determination unit 30 moves the container toward the other side of the coupler 7. It can be determined that an eccentric load has occurred on the trailer 5, and at this time, under the control of the control unit 50, the light emitting member of the warning generating unit 40 receives power from the power supply unit 51 and turns 'yellow'. of light can be emitted.

When the load measurement value of the one side load measurement unit 10 and the load measurement value of the other side load measurement unit 20 are the same, the eccentric load determination unit 30 is applied to one side and the other side of the coupler 7. It can be determined that the unbalanced load of the container trailer 5 has not occurred, and at this time, the warning generating unit 40 can be stopped under the control of the control unit 50 .

11 is a flowchart schematically illustrating a process of operating a brake.

Next, the control unit 50 controls the brakes of the tractor based on the determination result of the eccentric load determination unit 30 to reduce the tractor to a predetermined speed or less to prevent the tractor from overturning, FIG. 11 As shown in, the load measurement value of the one side load measurement unit 10 exceeds the load measurement value of the other side load measurement unit 20 or the load measurement value of the other side load measurement unit 20 is the one side load measurement unit When the load measurement value of (10) is exceeded, the brake of the tractor may be operated so that the tractor travels at a reduced speed below the reference speed value preset in the control unit 50.

When the load measurement value of the one side load measurement unit 10 and the load measurement value of the other side load measurement unit 20 are the same, the control unit 50 may release the operation of the brake.

3; body, 31; brake,
5; trailer, 51; tow,
510; Kingpin, 7; coupler,
10; One side load measuring unit, 20; the other side load measurement unit,
30; eccentric load determination unit, 50; control unit.

Claims (7)

In a tractor provided with a coupler provided on the rear side of a vehicle body and coupled to a kingpin of a towing unit provided on the front side of a trailer loaded with containers,
One side, the front, the rear, and the upper part of the one side step groove are formed so that one side step groove and the other side step groove are recessed into one side and the other side of the coupler, and the cross-sectional shape of the one side step groove is formed in a '┛' shape. open, and the other step groove is formed symmetrically with the cross-sectional shape of the one side step groove,
One side protrusion and the other side protrusion protruding at a predetermined height in the upper direction of the one side step groove and the upper direction of the other side step groove are formed on the bottom surface of the one side step groove and the bottom surface of the other step groove, respectively,
a one-side load measurement unit made of a load cell seated and fixed on an upper portion of the one-side protruding jaw to measure a load applied to one side of the coupler;
an other side load measuring unit including a load cell seated and fixed on the upper side of the other protruding jaw to measure a load applied to the other side of the coupler;
In order to improve the load measurement efficiency of the one-side load measuring unit, it is accommodated in the one-side step groove having a cross-sectional shape of '┛' in a state of being seated on the top of the one-side load measuring unit and extends to a certain length in the front and rear direction of the coupler, , In order to prevent separation from the one-side stepped groove, the one-side load measuring part and the one-side protruding jaw are inserted into the one-side lower groove formed in the lower middle part, and the one-side load-measuring part is accommodated on the inner surface of the one-side lower groove a load-bearing plate on one side, the lower surface of which is spaced apart from the bottom surface of the one-side stepped groove at a predetermined height in a state of surface contact with the upper portion;
To improve the load measurement efficiency of the other load measurement unit, the cross-sectional shape is accommodated in the other side step groove formed left-right symmetrically with the one side step groove in a state of being seated on top of the other load measurement unit, and is constant in the front and rear directions of the coupler. The other side load measuring part and the other protruding jaw are accommodated in the other side lower groove recessed in the lower middle part to prevent separation from the other side step groove, and the other side load measuring part is accommodated in the other side protruding jaw. The other load supporting plate, the lower surface of which is in surface contact with the upper inner surface of the lower groove, is spaced apart from the bottom surface of the other stepped groove by a predetermined height;
an eccentric load determination unit for determining an unbalanced load by comparing a load measurement value of the load measurement unit on one side and a load measurement value of the load measurement unit on the other side;
A container yard tractor capable of tipping prevention comprising a; control unit for controlling the brake of the tractor based on the determination result of the eccentric load determination unit.
In a tractor provided with a coupler provided on the rear side of a vehicle body and coupled to a kingpin of a towing unit provided on the front side of a trailer loaded with containers,
One side groove and the other side groove are formed on one side and the other side of the coupler, respectively,
a one-side load measuring unit made of a strain gauge seated and fixed on the bottom surface of the one-side groove to measure a load applied to one side of the coupler;
an other side load measurement unit made of a strain gauge seated and fixed on the bottom surface of the other side groove to measure a load applied to the other side of the coupler;
a one-side protective cover made of a filler filled in the one-side groove and protecting the one-side load-measuring part so that the one-side load measuring part is provided in the one-side groove in a state where the one-side load measuring part is accommodated therein;
an other side protective cover made of a filler filled in the other side groove so as to be provided in the other side groove in a state where the other side load measuring unit is accommodated inside, and protecting the other side load measuring unit;
an eccentric load determination unit for determining an unbalanced load by comparing a load measurement value of the load measurement unit on one side and a load measurement value of the load measurement unit on the other side;
A container yard tractor capable of tipping prevention comprising a; control unit for controlling the brake of the tractor based on the determination result of the eccentric load determination unit.
According to claim 1 or 2,
A warning generating unit for generating a warning signal; is provided,
The controller is a container yard tractor capable of tipping prevention, characterized in that for controlling the warning generating unit according to the determination result of the eccentric load determination unit. delete delete delete delete